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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1991, 1992 Linus Torvalds |
3 | */ | |
4 | ||
5 | /* | |
6 | * Hopefully this will be a rather complete VT102 implementation. | |
7 | * | |
8 | * Beeping thanks to John T Kohl. | |
9 | * | |
10 | * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics | |
11 | * Chars, and VT100 enhancements by Peter MacDonald. | |
12 | * | |
13 | * Copy and paste function by Andrew Haylett, | |
14 | * some enhancements by Alessandro Rubini. | |
15 | * | |
16 | * Code to check for different video-cards mostly by Galen Hunt, | |
17 | * <g-hunt@ee.utah.edu> | |
18 | * | |
19 | * Rudimentary ISO 10646/Unicode/UTF-8 character set support by | |
20 | * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. | |
21 | * | |
22 | * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 | |
23 | * Resizing of consoles, aeb, 940926 | |
24 | * | |
25 | * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 | |
26 | * <poe@daimi.aau.dk> | |
27 | * | |
28 | * User-defined bell sound, new setterm control sequences and printk | |
29 | * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 | |
30 | * | |
31 | * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> | |
32 | * | |
33 | * Merge with the abstract console driver by Geert Uytterhoeven | |
34 | * <geert@linux-m68k.org>, Jan 1997. | |
35 | * | |
36 | * Original m68k console driver modifications by | |
37 | * | |
38 | * - Arno Griffioen <arno@usn.nl> | |
39 | * - David Carter <carter@cs.bris.ac.uk> | |
40 | * | |
41 | * The abstract console driver provides a generic interface for a text | |
42 | * console. It supports VGA text mode, frame buffer based graphical consoles | |
43 | * and special graphics processors that are only accessible through some | |
44 | * registers (e.g. a TMS340x0 GSP). | |
45 | * | |
46 | * The interface to the hardware is specified using a special structure | |
47 | * (struct consw) which contains function pointers to console operations | |
48 | * (see <linux/console.h> for more information). | |
49 | * | |
50 | * Support for changeable cursor shape | |
51 | * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 | |
52 | * | |
53 | * Ported to i386 and con_scrolldelta fixed | |
54 | * by Emmanuel Marty <core@ggi-project.org>, April 1998 | |
55 | * | |
56 | * Resurrected character buffers in videoram plus lots of other trickery | |
57 | * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 | |
58 | * | |
59 | * Removed old-style timers, introduced console_timer, made timer | |
e1f8e874 | 60 | * deletion SMP-safe. 17Jun00, Andrew Morton |
1da177e4 LT |
61 | * |
62 | * Removed console_lock, enabled interrupts across all console operations | |
63 | * 13 March 2001, Andrew Morton | |
d4328b40 AT |
64 | * |
65 | * Fixed UTF-8 mode so alternate charset modes always work according | |
66 | * to control sequences interpreted in do_con_trol function | |
67 | * preserving backward VT100 semigraphics compatibility, | |
68 | * malformed UTF sequences represented as sequences of replacement glyphs, | |
69 | * original codes or '?' as a last resort if replacement glyph is undefined | |
70 | * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 | |
1da177e4 LT |
71 | */ |
72 | ||
73 | #include <linux/module.h> | |
74 | #include <linux/types.h> | |
75 | #include <linux/sched.h> | |
76 | #include <linux/tty.h> | |
77 | #include <linux/tty_flip.h> | |
78 | #include <linux/kernel.h> | |
79 | #include <linux/string.h> | |
80 | #include <linux/errno.h> | |
81 | #include <linux/kd.h> | |
82 | #include <linux/slab.h> | |
83 | #include <linux/major.h> | |
84 | #include <linux/mm.h> | |
85 | #include <linux/console.h> | |
86 | #include <linux/init.h> | |
c831c338 | 87 | #include <linux/mutex.h> |
1da177e4 LT |
88 | #include <linux/vt_kern.h> |
89 | #include <linux/selection.h> | |
90 | #include <linux/tiocl.h> | |
91 | #include <linux/kbd_kern.h> | |
92 | #include <linux/consolemap.h> | |
93 | #include <linux/timer.h> | |
94 | #include <linux/interrupt.h> | |
1da177e4 | 95 | #include <linux/workqueue.h> |
1da177e4 LT |
96 | #include <linux/pm.h> |
97 | #include <linux/font.h> | |
98 | #include <linux/bitops.h> | |
b293d758 | 99 | #include <linux/notifier.h> |
d81ed103 AC |
100 | #include <linux/device.h> |
101 | #include <linux/io.h> | |
d81ed103 | 102 | #include <linux/uaccess.h> |
81d44507 | 103 | #include <linux/kdb.h> |
74c807ce | 104 | #include <linux/ctype.h> |
1da177e4 | 105 | |
3e795de7 | 106 | #define MAX_NR_CON_DRIVER 16 |
1da177e4 | 107 | |
6db4063c | 108 | #define CON_DRIVER_FLAG_MODULE 1 |
928e964f AD |
109 | #define CON_DRIVER_FLAG_INIT 2 |
110 | #define CON_DRIVER_FLAG_ATTR 4 | |
d364b5c3 | 111 | #define CON_DRIVER_FLAG_ZOMBIE 8 |
3e795de7 AD |
112 | |
113 | struct con_driver { | |
114 | const struct consw *con; | |
115 | const char *desc; | |
805952a8 | 116 | struct device *dev; |
6db4063c | 117 | int node; |
3e795de7 AD |
118 | int first; |
119 | int last; | |
120 | int flag; | |
121 | }; | |
122 | ||
123 | static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; | |
1da177e4 LT |
124 | const struct consw *conswitchp; |
125 | ||
126 | /* A bitmap for codes <32. A bit of 1 indicates that the code | |
127 | * corresponding to that bit number invokes some special action | |
128 | * (such as cursor movement) and should not be displayed as a | |
129 | * glyph unless the disp_ctrl mode is explicitly enabled. | |
130 | */ | |
131 | #define CTRL_ACTION 0x0d00ff81 | |
132 | #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ | |
133 | ||
134 | /* | |
135 | * Here is the default bell parameters: 750HZ, 1/8th of a second | |
136 | */ | |
137 | #define DEFAULT_BELL_PITCH 750 | |
138 | #define DEFAULT_BELL_DURATION (HZ/8) | |
bd63364c | 139 | #define DEFAULT_CURSOR_BLINK_MS 200 |
1da177e4 | 140 | |
1da177e4 LT |
141 | struct vc vc_cons [MAX_NR_CONSOLES]; |
142 | ||
143 | #ifndef VT_SINGLE_DRIVER | |
144 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; | |
145 | #endif | |
146 | ||
147 | static int con_open(struct tty_struct *, struct file *); | |
148 | static void vc_init(struct vc_data *vc, unsigned int rows, | |
149 | unsigned int cols, int do_clear); | |
150 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); | |
151 | static void save_cur(struct vc_data *vc); | |
152 | static void reset_terminal(struct vc_data *vc, int do_clear); | |
153 | static void con_flush_chars(struct tty_struct *tty); | |
403aac96 | 154 | static int set_vesa_blanking(char __user *p); |
1da177e4 LT |
155 | static void set_cursor(struct vc_data *vc); |
156 | static void hide_cursor(struct vc_data *vc); | |
65f27f38 | 157 | static void console_callback(struct work_struct *ignored); |
d364b5c3 | 158 | static void con_driver_unregister_callback(struct work_struct *ignored); |
1da177e4 LT |
159 | static void blank_screen_t(unsigned long dummy); |
160 | static void set_palette(struct vc_data *vc); | |
161 | ||
52c40fca PH |
162 | #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1) |
163 | ||
1da177e4 | 164 | static int printable; /* Is console ready for printing? */ |
77bf2bab | 165 | int default_utf8 = true; |
042f10ec | 166 | module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
f6c06b68 MG |
167 | int global_cursor_default = -1; |
168 | module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); | |
1da177e4 | 169 | |
9ea9a886 CL |
170 | static int cur_default = CUR_DEFAULT; |
171 | module_param(cur_default, int, S_IRUGO | S_IWUSR); | |
172 | ||
1da177e4 LT |
173 | /* |
174 | * ignore_poke: don't unblank the screen when things are typed. This is | |
175 | * mainly for the privacy of braille terminal users. | |
176 | */ | |
177 | static int ignore_poke; | |
178 | ||
179 | int do_poke_blanked_console; | |
180 | int console_blanked; | |
181 | ||
182 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ | |
1da177e4 | 183 | static int vesa_off_interval; |
f324edc8 DM |
184 | static int blankinterval = 10*60; |
185 | core_param(consoleblank, blankinterval, int, 0444); | |
1da177e4 | 186 | |
65f27f38 | 187 | static DECLARE_WORK(console_work, console_callback); |
d364b5c3 | 188 | static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback); |
1da177e4 LT |
189 | |
190 | /* | |
191 | * fg_console is the current virtual console, | |
192 | * last_console is the last used one, | |
193 | * want_console is the console we want to switch to, | |
b45cfba4 | 194 | * saved_* variants are for save/restore around kernel debugger enter/leave |
1da177e4 LT |
195 | */ |
196 | int fg_console; | |
197 | int last_console; | |
198 | int want_console = -1; | |
fed891c8 JW |
199 | static int saved_fg_console; |
200 | static int saved_last_console; | |
201 | static int saved_want_console; | |
202 | static int saved_vc_mode; | |
beed5336 | 203 | static int saved_console_blanked; |
1da177e4 LT |
204 | |
205 | /* | |
206 | * For each existing display, we have a pointer to console currently visible | |
207 | * on that display, allowing consoles other than fg_console to be refreshed | |
208 | * appropriately. Unless the low-level driver supplies its own display_fg | |
209 | * variable, we use this one for the "master display". | |
210 | */ | |
211 | static struct vc_data *master_display_fg; | |
212 | ||
213 | /* | |
214 | * Unfortunately, we need to delay tty echo when we're currently writing to the | |
215 | * console since the code is (and always was) not re-entrant, so we schedule | |
216 | * all flip requests to process context with schedule-task() and run it from | |
217 | * console_callback(). | |
218 | */ | |
219 | ||
220 | /* | |
221 | * For the same reason, we defer scrollback to the console callback. | |
222 | */ | |
223 | static int scrollback_delta; | |
224 | ||
225 | /* | |
226 | * Hook so that the power management routines can (un)blank | |
227 | * the console on our behalf. | |
228 | */ | |
229 | int (*console_blank_hook)(int); | |
230 | ||
40565f19 | 231 | static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); |
1da177e4 LT |
232 | static int blank_state; |
233 | static int blank_timer_expired; | |
234 | enum { | |
235 | blank_off = 0, | |
236 | blank_normal_wait, | |
237 | blank_vesa_wait, | |
238 | }; | |
239 | ||
fbc92a34 KS |
240 | /* |
241 | * /sys/class/tty/tty0/ | |
242 | * | |
243 | * the attribute 'active' contains the name of the current vc | |
244 | * console and it supports poll() to detect vc switches | |
245 | */ | |
246 | static struct device *tty0dev; | |
247 | ||
b293d758 ST |
248 | /* |
249 | * Notifier list for console events. | |
250 | */ | |
251 | static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); | |
252 | ||
253 | int register_vt_notifier(struct notifier_block *nb) | |
254 | { | |
255 | return atomic_notifier_chain_register(&vt_notifier_list, nb); | |
256 | } | |
257 | EXPORT_SYMBOL_GPL(register_vt_notifier); | |
258 | ||
259 | int unregister_vt_notifier(struct notifier_block *nb) | |
260 | { | |
261 | return atomic_notifier_chain_unregister(&vt_notifier_list, nb); | |
262 | } | |
263 | EXPORT_SYMBOL_GPL(unregister_vt_notifier); | |
264 | ||
265 | static void notify_write(struct vc_data *vc, unsigned int unicode) | |
266 | { | |
502fcb79 | 267 | struct vt_notifier_param param = { .vc = vc, .c = unicode }; |
b293d758 ST |
268 | atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); |
269 | } | |
270 | ||
271 | static void notify_update(struct vc_data *vc) | |
272 | { | |
273 | struct vt_notifier_param param = { .vc = vc }; | |
274 | atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); | |
275 | } | |
1da177e4 LT |
276 | /* |
277 | * Low-Level Functions | |
278 | */ | |
279 | ||
6ca8dfd7 JS |
280 | static inline bool con_is_fg(const struct vc_data *vc) |
281 | { | |
282 | return vc->vc_num == fg_console; | |
283 | } | |
284 | ||
285 | static inline bool con_should_update(const struct vc_data *vc) | |
286 | { | |
287 | return con_is_visible(vc) && !console_blanked; | |
288 | } | |
1da177e4 LT |
289 | |
290 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) | |
291 | { | |
292 | unsigned short *p; | |
293 | ||
294 | if (!viewed) | |
295 | p = (unsigned short *)(vc->vc_origin + offset); | |
296 | else if (!vc->vc_sw->con_screen_pos) | |
297 | p = (unsigned short *)(vc->vc_visible_origin + offset); | |
298 | else | |
299 | p = vc->vc_sw->con_screen_pos(vc, offset); | |
300 | return p; | |
301 | } | |
302 | ||
e33ac1c1 | 303 | /* Called from the keyboard irq path.. */ |
1da177e4 LT |
304 | static inline void scrolldelta(int lines) |
305 | { | |
e33ac1c1 AC |
306 | /* FIXME */ |
307 | /* scrolldelta needs some kind of consistency lock, but the BKL was | |
308 | and still is not protecting versus the scheduled back end */ | |
1da177e4 LT |
309 | scrollback_delta += lines; |
310 | schedule_console_callback(); | |
311 | } | |
312 | ||
313 | void schedule_console_callback(void) | |
314 | { | |
315 | schedule_work(&console_work); | |
316 | } | |
317 | ||
318 | static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
319 | { | |
320 | unsigned short *d, *s; | |
321 | ||
322 | if (t+nr >= b) | |
323 | nr = b - t - 1; | |
324 | if (b > vc->vc_rows || t >= b || nr < 1) | |
325 | return; | |
6ca8dfd7 | 326 | if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) |
1da177e4 LT |
327 | return; |
328 | d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
329 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
330 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
386f40c8 | 331 | scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, |
1da177e4 LT |
332 | vc->vc_size_row * nr); |
333 | } | |
334 | ||
335 | static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
336 | { | |
337 | unsigned short *s; | |
338 | unsigned int step; | |
339 | ||
340 | if (t+nr >= b) | |
341 | nr = b - t - 1; | |
342 | if (b > vc->vc_rows || t >= b || nr < 1) | |
343 | return; | |
6ca8dfd7 | 344 | if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) |
1da177e4 LT |
345 | return; |
346 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
347 | step = vc->vc_cols * nr; | |
348 | scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); | |
93f78da4 | 349 | scr_memsetw(s, vc->vc_video_erase_char, 2 * step); |
1da177e4 LT |
350 | } |
351 | ||
352 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
353 | { | |
1da177e4 LT |
354 | unsigned int xx, yy, offset; |
355 | u16 *p; | |
356 | ||
357 | p = (u16 *) start; | |
358 | if (!vc->vc_sw->con_getxy) { | |
359 | offset = (start - vc->vc_origin) / 2; | |
360 | xx = offset % vc->vc_cols; | |
361 | yy = offset / vc->vc_cols; | |
362 | } else { | |
363 | int nxx, nyy; | |
364 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
365 | xx = nxx; yy = nyy; | |
366 | } | |
367 | for(;;) { | |
368 | u16 attrib = scr_readw(p) & 0xff00; | |
369 | int startx = xx; | |
370 | u16 *q = p; | |
371 | while (xx < vc->vc_cols && count) { | |
372 | if (attrib != (scr_readw(p) & 0xff00)) { | |
373 | if (p > q) | |
374 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
375 | startx = xx; | |
376 | q = p; | |
377 | attrib = scr_readw(p) & 0xff00; | |
378 | } | |
379 | p++; | |
380 | xx++; | |
381 | count--; | |
382 | } | |
383 | if (p > q) | |
384 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
385 | if (!count) | |
386 | break; | |
387 | xx = 0; | |
388 | yy++; | |
389 | if (vc->vc_sw->con_getxy) { | |
390 | p = (u16 *)start; | |
391 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
392 | } | |
393 | } | |
1da177e4 LT |
394 | } |
395 | ||
396 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
397 | { | |
398 | WARN_CONSOLE_UNLOCKED(); | |
399 | ||
6ca8dfd7 | 400 | if (con_should_update(vc)) { |
1da177e4 LT |
401 | hide_cursor(vc); |
402 | do_update_region(vc, start, count); | |
403 | set_cursor(vc); | |
404 | } | |
405 | } | |
406 | ||
407 | /* Structure of attributes is hardware-dependent */ | |
408 | ||
fa6ce9ab JE |
409 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
410 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
411 | { |
412 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
413 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
414 | _blink, _underline, _reverse, _italic); | |
1da177e4 | 415 | |
1da177e4 LT |
416 | /* |
417 | * ++roman: I completely changed the attribute format for monochrome | |
418 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
419 | * adapter) format didn't allow the combination of certain effects. | |
420 | * Now the attribute is just a bit vector: | |
421 | * Bit 0..1: intensity (0..2) | |
422 | * Bit 2 : underline | |
423 | * Bit 3 : reverse | |
424 | * Bit 7 : blink | |
425 | */ | |
426 | { | |
c9e587ab | 427 | u8 a = _color; |
1da177e4 LT |
428 | if (!vc->vc_can_do_color) |
429 | return _intensity | | |
fa6ce9ab | 430 | (_italic ? 2 : 0) | |
1da177e4 LT |
431 | (_underline ? 4 : 0) | |
432 | (_reverse ? 8 : 0) | | |
433 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
434 | if (_italic) |
435 | a = (a & 0xF0) | vc->vc_itcolor; | |
436 | else if (_underline) | |
1da177e4 LT |
437 | a = (a & 0xf0) | vc->vc_ulcolor; |
438 | else if (_intensity == 0) | |
439 | a = (a & 0xf0) | vc->vc_ulcolor; | |
440 | if (_reverse) | |
441 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
442 | if (_blink) | |
443 | a ^= 0x80; | |
444 | if (_intensity == 2) | |
445 | a ^= 0x08; | |
446 | if (vc->vc_hi_font_mask == 0x100) | |
447 | a <<= 1; | |
448 | return a; | |
449 | } | |
1da177e4 LT |
450 | } |
451 | ||
452 | static void update_attr(struct vc_data *vc) | |
453 | { | |
fa6ce9ab JE |
454 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
455 | vc->vc_blink, vc->vc_underline, | |
456 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
457 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
1da177e4 LT |
458 | } |
459 | ||
460 | /* Note: inverting the screen twice should revert to the original state */ | |
461 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
462 | { | |
463 | unsigned short *p; | |
464 | ||
465 | WARN_CONSOLE_UNLOCKED(); | |
466 | ||
467 | count /= 2; | |
468 | p = screenpos(vc, offset, viewed); | |
6af39ed3 | 469 | if (vc->vc_sw->con_invert_region) { |
1da177e4 | 470 | vc->vc_sw->con_invert_region(vc, p, count); |
6af39ed3 | 471 | } else { |
1da177e4 LT |
472 | u16 *q = p; |
473 | int cnt = count; | |
474 | u16 a; | |
475 | ||
476 | if (!vc->vc_can_do_color) { | |
477 | while (cnt--) { | |
478 | a = scr_readw(q); | |
479 | a ^= 0x0800; | |
480 | scr_writew(a, q); | |
481 | q++; | |
482 | } | |
483 | } else if (vc->vc_hi_font_mask == 0x100) { | |
484 | while (cnt--) { | |
485 | a = scr_readw(q); | |
486 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
487 | scr_writew(a, q); | |
488 | q++; | |
489 | } | |
490 | } else { | |
491 | while (cnt--) { | |
492 | a = scr_readw(q); | |
493 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
494 | scr_writew(a, q); | |
495 | q++; | |
496 | } | |
497 | } | |
498 | } | |
6af39ed3 | 499 | |
6ca8dfd7 | 500 | if (con_should_update(vc)) |
1da177e4 | 501 | do_update_region(vc, (unsigned long) p, count); |
19e3ae6b | 502 | notify_update(vc); |
1da177e4 LT |
503 | } |
504 | ||
505 | /* used by selection: complement pointer position */ | |
506 | void complement_pos(struct vc_data *vc, int offset) | |
507 | { | |
414edcd3 | 508 | static int old_offset = -1; |
1da177e4 LT |
509 | static unsigned short old; |
510 | static unsigned short oldx, oldy; | |
511 | ||
512 | WARN_CONSOLE_UNLOCKED(); | |
513 | ||
414edcd3 AD |
514 | if (old_offset != -1 && old_offset >= 0 && |
515 | old_offset < vc->vc_screenbuf_size) { | |
516 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
6ca8dfd7 | 517 | if (con_should_update(vc)) |
1da177e4 | 518 | vc->vc_sw->con_putc(vc, old, oldy, oldx); |
19e3ae6b | 519 | notify_update(vc); |
1da177e4 | 520 | } |
414edcd3 AD |
521 | |
522 | old_offset = offset; | |
523 | ||
524 | if (offset != -1 && offset >= 0 && | |
525 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 526 | unsigned short new; |
414edcd3 | 527 | unsigned short *p; |
1da177e4 LT |
528 | p = screenpos(vc, offset, 1); |
529 | old = scr_readw(p); | |
530 | new = old ^ vc->vc_complement_mask; | |
531 | scr_writew(new, p); | |
6ca8dfd7 | 532 | if (con_should_update(vc)) { |
1da177e4 LT |
533 | oldx = (offset >> 1) % vc->vc_cols; |
534 | oldy = (offset >> 1) / vc->vc_cols; | |
535 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
536 | } | |
19e3ae6b | 537 | notify_update(vc); |
1da177e4 LT |
538 | } |
539 | } | |
540 | ||
541 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
542 | { | |
81732c3b | 543 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 544 | |
a883b70d | 545 | scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b | 546 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
1da177e4 | 547 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 548 | if (con_should_update(vc)) |
81732c3b | 549 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 550 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
551 | } |
552 | ||
553 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
554 | { | |
81732c3b | 555 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 556 | |
b1a925f4 | 557 | scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b JFM |
558 | scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, |
559 | nr * 2); | |
1da177e4 | 560 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 561 | if (con_should_update(vc)) |
81732c3b | 562 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 563 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
564 | } |
565 | ||
e882f715 | 566 | static int softcursor_original = -1; |
1da177e4 LT |
567 | |
568 | static void add_softcursor(struct vc_data *vc) | |
569 | { | |
570 | int i = scr_readw((u16 *) vc->vc_pos); | |
571 | u32 type = vc->vc_cursor_type; | |
572 | ||
573 | if (! (type & 0x10)) return; | |
574 | if (softcursor_original != -1) return; | |
575 | softcursor_original = i; | |
576 | i |= ((type >> 8) & 0xff00 ); | |
577 | i ^= ((type) & 0xff00 ); | |
578 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
579 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
580 | scr_writew(i, (u16 *) vc->vc_pos); | |
6ca8dfd7 | 581 | if (con_should_update(vc)) |
1da177e4 LT |
582 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); |
583 | } | |
584 | ||
585 | static void hide_softcursor(struct vc_data *vc) | |
586 | { | |
587 | if (softcursor_original != -1) { | |
588 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
6ca8dfd7 | 589 | if (con_should_update(vc)) |
1da177e4 LT |
590 | vc->vc_sw->con_putc(vc, softcursor_original, |
591 | vc->vc_y, vc->vc_x); | |
592 | softcursor_original = -1; | |
593 | } | |
594 | } | |
595 | ||
596 | static void hide_cursor(struct vc_data *vc) | |
597 | { | |
598 | if (vc == sel_cons) | |
599 | clear_selection(); | |
600 | vc->vc_sw->con_cursor(vc, CM_ERASE); | |
601 | hide_softcursor(vc); | |
602 | } | |
603 | ||
604 | static void set_cursor(struct vc_data *vc) | |
605 | { | |
6ca8dfd7 | 606 | if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS) |
1da177e4 LT |
607 | return; |
608 | if (vc->vc_deccm) { | |
609 | if (vc == sel_cons) | |
610 | clear_selection(); | |
611 | add_softcursor(vc); | |
612 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
613 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
614 | } else | |
615 | hide_cursor(vc); | |
616 | } | |
617 | ||
618 | static void set_origin(struct vc_data *vc) | |
619 | { | |
620 | WARN_CONSOLE_UNLOCKED(); | |
621 | ||
6ca8dfd7 | 622 | if (!con_is_visible(vc) || |
1da177e4 LT |
623 | !vc->vc_sw->con_set_origin || |
624 | !vc->vc_sw->con_set_origin(vc)) | |
625 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
626 | vc->vc_visible_origin = vc->vc_origin; | |
627 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
628 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
629 | } | |
630 | ||
c0f160a7 | 631 | static void save_screen(struct vc_data *vc) |
1da177e4 LT |
632 | { |
633 | WARN_CONSOLE_UNLOCKED(); | |
634 | ||
635 | if (vc->vc_sw->con_save_screen) | |
636 | vc->vc_sw->con_save_screen(vc); | |
637 | } | |
638 | ||
639 | /* | |
640 | * Redrawing of screen | |
641 | */ | |
642 | ||
2a248307 | 643 | void clear_buffer_attributes(struct vc_data *vc) |
1da177e4 LT |
644 | { |
645 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
646 | int count = vc->vc_screenbuf_size / 2; | |
647 | int mask = vc->vc_hi_font_mask | 0xff; | |
648 | ||
649 | for (; count > 0; count--, p++) { | |
650 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
651 | } | |
652 | } | |
653 | ||
654 | void redraw_screen(struct vc_data *vc, int is_switch) | |
655 | { | |
656 | int redraw = 0; | |
657 | ||
658 | WARN_CONSOLE_UNLOCKED(); | |
659 | ||
660 | if (!vc) { | |
661 | /* strange ... */ | |
662 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
663 | return; | |
664 | } | |
665 | ||
666 | if (is_switch) { | |
667 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
668 | if (old_vc == vc) | |
669 | return; | |
6ca8dfd7 | 670 | if (!con_is_visible(vc)) |
1da177e4 LT |
671 | redraw = 1; |
672 | *vc->vc_display_fg = vc; | |
673 | fg_console = vc->vc_num; | |
674 | hide_cursor(old_vc); | |
6ca8dfd7 | 675 | if (!con_is_visible(old_vc)) { |
1da177e4 LT |
676 | save_screen(old_vc); |
677 | set_origin(old_vc); | |
678 | } | |
fbc92a34 KS |
679 | if (tty0dev) |
680 | sysfs_notify(&tty0dev->kobj, NULL, "active"); | |
1da177e4 LT |
681 | } else { |
682 | hide_cursor(vc); | |
683 | redraw = 1; | |
684 | } | |
685 | ||
686 | if (redraw) { | |
687 | int update; | |
688 | int old_was_color = vc->vc_can_do_color; | |
689 | ||
690 | set_origin(vc); | |
691 | update = vc->vc_sw->con_switch(vc); | |
692 | set_palette(vc); | |
693 | /* | |
694 | * If console changed from mono<->color, the best we can do | |
695 | * is to clear the buffer attributes. As it currently stands, | |
696 | * rebuilding new attributes from the old buffer is not doable | |
697 | * without overly complex code. | |
698 | */ | |
699 | if (old_was_color != vc->vc_can_do_color) { | |
700 | update_attr(vc); | |
701 | clear_buffer_attributes(vc); | |
702 | } | |
8fd4bd22 JB |
703 | |
704 | /* Forcibly update if we're panicing */ | |
705 | if ((update && vc->vc_mode != KD_GRAPHICS) || | |
706 | vt_force_oops_output(vc)) | |
1da177e4 LT |
707 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
708 | } | |
709 | set_cursor(vc); | |
710 | if (is_switch) { | |
711 | set_leds(); | |
712 | compute_shiftstate(); | |
8182ec49 | 713 | notify_update(vc); |
1da177e4 LT |
714 | } |
715 | } | |
716 | ||
717 | /* | |
718 | * Allocation, freeing and resizing of VTs. | |
719 | */ | |
720 | ||
721 | int vc_cons_allocated(unsigned int i) | |
722 | { | |
723 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
724 | } | |
725 | ||
726 | static void visual_init(struct vc_data *vc, int num, int init) | |
727 | { | |
728 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
729 | if (vc->vc_sw) | |
730 | module_put(vc->vc_sw->owner); | |
731 | vc->vc_sw = conswitchp; | |
732 | #ifndef VT_SINGLE_DRIVER | |
733 | if (con_driver_map[num]) | |
734 | vc->vc_sw = con_driver_map[num]; | |
735 | #endif | |
736 | __module_get(vc->vc_sw->owner); | |
737 | vc->vc_num = num; | |
738 | vc->vc_display_fg = &master_display_fg; | |
08b33249 DZ |
739 | if (vc->vc_uni_pagedir_loc) |
740 | con_free_unimap(vc); | |
1da177e4 | 741 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
e4bdab70 | 742 | vc->vc_uni_pagedir = NULL; |
1da177e4 LT |
743 | vc->vc_hi_font_mask = 0; |
744 | vc->vc_complement_mask = 0; | |
745 | vc->vc_can_do_color = 0; | |
8fd4bd22 | 746 | vc->vc_panic_force_write = false; |
1b45996d | 747 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
748 | vc->vc_sw->con_init(vc, init); |
749 | if (!vc->vc_complement_mask) | |
750 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
751 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
752 | vc->vc_size_row = vc->vc_cols << 1; | |
753 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
754 | } | |
755 | ||
756 | int vc_allocate(unsigned int currcons) /* return 0 on success */ | |
757 | { | |
34902b7f JS |
758 | struct vt_notifier_param param; |
759 | struct vc_data *vc; | |
760 | ||
1da177e4 LT |
761 | WARN_CONSOLE_UNLOCKED(); |
762 | ||
763 | if (currcons >= MAX_NR_CONSOLES) | |
764 | return -ENXIO; | |
34902b7f JS |
765 | |
766 | if (vc_cons[currcons].d) | |
767 | return 0; | |
768 | ||
769 | /* due to the granularity of kmalloc, we waste some memory here */ | |
770 | /* the alloc is done in two steps, to optimize the common situation | |
771 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
772 | /* although the numbers above are not valid since long ago, the | |
773 | point is still up-to-date and the comment still has its value | |
774 | even if only as a historical artifact. --mj, July 1998 */ | |
775 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); | |
776 | if (!vc) | |
1da177e4 | 777 | return -ENOMEM; |
34902b7f JS |
778 | |
779 | vc_cons[currcons].d = vc; | |
780 | tty_port_init(&vc->port); | |
781 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); | |
782 | ||
783 | visual_init(vc, currcons, 1); | |
784 | ||
785 | if (!*vc->vc_uni_pagedir_loc) | |
1da177e4 | 786 | con_set_default_unimap(vc); |
f6c06b68 | 787 | |
34902b7f JS |
788 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
789 | if (!vc->vc_screenbuf) | |
790 | goto err_free; | |
791 | ||
792 | /* If no drivers have overridden us and the user didn't pass a | |
793 | boot option, default to displaying the cursor */ | |
794 | if (global_cursor_default == -1) | |
795 | global_cursor_default = 1; | |
796 | ||
797 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); | |
798 | vcs_make_sysfs(currcons); | |
799 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); | |
f6c06b68 | 800 | |
1da177e4 | 801 | return 0; |
34902b7f JS |
802 | err_free: |
803 | kfree(vc); | |
804 | vc_cons[currcons].d = NULL; | |
805 | return -ENOMEM; | |
1da177e4 LT |
806 | } |
807 | ||
e400b6ec AD |
808 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
809 | int user) | |
1da177e4 LT |
810 | { |
811 | /* Resizes the resolution of the display adapater */ | |
812 | int err = 0; | |
813 | ||
814 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
815 | err = vc->vc_sw->con_resize(vc, width, height, user); |
816 | ||
1da177e4 LT |
817 | return err; |
818 | } | |
819 | ||
820 | /* | |
821 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
822 | * [this is to be used together with some user program | |
823 | * like resize that changes the hardware videomode] | |
824 | */ | |
825 | #define VC_RESIZE_MAXCOL (32767) | |
826 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
827 | |
828 | /** | |
829 | * vc_do_resize - resizing method for the tty | |
830 | * @tty: tty being resized | |
831 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
832 | * @vc: virtual console private data | |
833 | * @cols: columns | |
834 | * @lines: lines | |
835 | * | |
836 | * Resize a virtual console, clipping according to the actual constraints. | |
837 | * If the caller passes a tty structure then update the termios winsize | |
3ad2f3fb | 838 | * information and perform any necessary signal handling. |
8c9a9dd0 | 839 | * |
6a1c0680 | 840 | * Caller must hold the console semaphore. Takes the termios rwsem and |
8c9a9dd0 AC |
841 | * ctrl_lock of the tty IFF a tty is passed. |
842 | */ | |
843 | ||
fc6f6238 AC |
844 | static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
845 | unsigned int cols, unsigned int lines) | |
1da177e4 LT |
846 | { |
847 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
9e0ba741 | 848 | unsigned long end; |
f2ee4ae8 | 849 | unsigned int old_rows, old_row_size; |
1da177e4 | 850 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
9e0ba741 | 851 | unsigned int user; |
1da177e4 LT |
852 | unsigned short *newscreen; |
853 | ||
854 | WARN_CONSOLE_UNLOCKED(); | |
855 | ||
856 | if (!vc) | |
857 | return -ENXIO; | |
858 | ||
e400b6ec AD |
859 | user = vc->vc_resize_user; |
860 | vc->vc_resize_user = 0; | |
861 | ||
1da177e4 LT |
862 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
863 | return -EINVAL; | |
864 | ||
865 | new_cols = (cols ? cols : vc->vc_cols); | |
866 | new_rows = (lines ? lines : vc->vc_rows); | |
867 | new_row_size = new_cols << 1; | |
868 | new_screen_size = new_row_size * new_rows; | |
869 | ||
870 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
871 | return 0; | |
872 | ||
32b2921e DV |
873 | if (new_screen_size > (4 << 20)) |
874 | return -EINVAL; | |
5cbded58 | 875 | newscreen = kmalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
876 | if (!newscreen) |
877 | return -ENOMEM; | |
878 | ||
009e39ae SD |
879 | if (vc == sel_cons) |
880 | clear_selection(); | |
881 | ||
1da177e4 | 882 | old_rows = vc->vc_rows; |
1da177e4 | 883 | old_row_size = vc->vc_size_row; |
1da177e4 | 884 | |
e400b6ec | 885 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
886 | if (err) { |
887 | kfree(newscreen); | |
888 | return err; | |
889 | } | |
890 | ||
891 | vc->vc_rows = new_rows; | |
892 | vc->vc_cols = new_cols; | |
893 | vc->vc_size_row = new_row_size; | |
894 | vc->vc_screenbuf_size = new_screen_size; | |
895 | ||
896 | rlth = min(old_row_size, new_row_size); | |
897 | rrem = new_row_size - rlth; | |
898 | old_origin = vc->vc_origin; | |
899 | new_origin = (long) newscreen; | |
900 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
901 | |
902 | if (vc->vc_y > new_rows) { | |
903 | if (old_rows - vc->vc_y < new_rows) { | |
904 | /* | |
905 | * Cursor near the bottom, copy contents from the | |
906 | * bottom of buffer | |
907 | */ | |
908 | old_origin += (old_rows - new_rows) * old_row_size; | |
3b41dc1a AD |
909 | } else { |
910 | /* | |
911 | * Cursor is in no man's land, copy 1/2 screenful | |
912 | * from the top and bottom of cursor position | |
913 | */ | |
914 | old_origin += (vc->vc_y - new_rows/2) * old_row_size; | |
3b41dc1a | 915 | } |
9fc2b2d0 FJ |
916 | } |
917 | ||
918 | end = old_origin + old_row_size * min(old_rows, new_rows); | |
1da177e4 LT |
919 | |
920 | update_attr(vc); | |
921 | ||
3b41dc1a AD |
922 | while (old_origin < end) { |
923 | scr_memcpyw((unsigned short *) new_origin, | |
924 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 925 | if (rrem) |
3b41dc1a AD |
926 | scr_memsetw((void *)(new_origin + rlth), |
927 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
928 | old_origin += old_row_size; |
929 | new_origin += new_row_size; | |
930 | } | |
931 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
932 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
933 | new_scr_end - new_origin); | |
5c9228f0 | 934 | kfree(vc->vc_screenbuf); |
1da177e4 | 935 | vc->vc_screenbuf = newscreen; |
1da177e4 LT |
936 | vc->vc_screenbuf_size = new_screen_size; |
937 | set_origin(vc); | |
938 | ||
939 | /* do part of a reset_terminal() */ | |
940 | vc->vc_top = 0; | |
941 | vc->vc_bottom = vc->vc_rows; | |
942 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
943 | save_cur(vc); | |
944 | ||
8c9a9dd0 AC |
945 | if (tty) { |
946 | /* Rewrite the requested winsize data with the actual | |
947 | resulting sizes */ | |
948 | struct winsize ws; | |
1da177e4 LT |
949 | memset(&ws, 0, sizeof(ws)); |
950 | ws.ws_row = vc->vc_rows; | |
951 | ws.ws_col = vc->vc_cols; | |
952 | ws.ws_ypixel = vc->vc_scan_lines; | |
fc6f6238 | 953 | tty_do_resize(tty, &ws); |
1da177e4 LT |
954 | } |
955 | ||
6ca8dfd7 | 956 | if (con_is_visible(vc)) |
1da177e4 | 957 | update_screen(vc); |
8b92e87d | 958 | vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
1da177e4 LT |
959 | return err; |
960 | } | |
961 | ||
8c9a9dd0 AC |
962 | /** |
963 | * vc_resize - resize a VT | |
964 | * @vc: virtual console | |
965 | * @cols: columns | |
966 | * @rows: rows | |
967 | * | |
968 | * Resize a virtual console as seen from the console end of things. We | |
969 | * use the common vc_do_resize methods to update the structures. The | |
970 | * caller must hold the console sem to protect console internals and | |
8ce73264 | 971 | * vc->port.tty |
8c9a9dd0 AC |
972 | */ |
973 | ||
974 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
975 | { | |
8ce73264 | 976 | return vc_do_resize(vc->port.tty, vc, cols, rows); |
8c9a9dd0 AC |
977 | } |
978 | ||
979 | /** | |
980 | * vt_resize - resize a VT | |
981 | * @tty: tty to resize | |
8c9a9dd0 AC |
982 | * @ws: winsize attributes |
983 | * | |
984 | * Resize a virtual terminal. This is called by the tty layer as we | |
985 | * register our own handler for resizing. The mutual helper does all | |
986 | * the actual work. | |
987 | * | |
988 | * Takes the console sem and the called methods then take the tty | |
6a1c0680 | 989 | * termios_rwsem and the tty ctrl_lock in that order. |
8c9a9dd0 | 990 | */ |
da2bdf9a | 991 | static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
ca9bda00 | 992 | { |
8c9a9dd0 AC |
993 | struct vc_data *vc = tty->driver_data; |
994 | int ret; | |
ca9bda00 | 995 | |
ac751efa | 996 | console_lock(); |
fc6f6238 | 997 | ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
ac751efa | 998 | console_unlock(); |
8c9a9dd0 | 999 | return ret; |
ca9bda00 | 1000 | } |
1da177e4 | 1001 | |
421b40a6 | 1002 | struct vc_data *vc_deallocate(unsigned int currcons) |
1da177e4 | 1003 | { |
421b40a6 PH |
1004 | struct vc_data *vc = NULL; |
1005 | ||
1da177e4 LT |
1006 | WARN_CONSOLE_UNLOCKED(); |
1007 | ||
1008 | if (vc_cons_allocated(currcons)) { | |
421b40a6 | 1009 | struct vt_notifier_param param; |
4995f8ef | 1010 | |
421b40a6 | 1011 | param.vc = vc = vc_cons[currcons].d; |
b293d758 | 1012 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
4995f8ef | 1013 | vcs_remove_sysfs(currcons); |
1da177e4 | 1014 | vc->vc_sw->con_deinit(vc); |
bde0d2c9 | 1015 | put_pid(vc->vt_pid); |
d459ec0b | 1016 | module_put(vc->vc_sw->owner); |
5c9228f0 | 1017 | kfree(vc->vc_screenbuf); |
1da177e4 LT |
1018 | vc_cons[currcons].d = NULL; |
1019 | } | |
421b40a6 | 1020 | return vc; |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | /* | |
1024 | * VT102 emulator | |
1025 | */ | |
1026 | ||
079c9534 AC |
1027 | #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) |
1028 | #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) | |
1029 | #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) | |
1da177e4 LT |
1030 | |
1031 | #define decarm VC_REPEAT | |
1032 | #define decckm VC_CKMODE | |
1033 | #define kbdapplic VC_APPLIC | |
1034 | #define lnm VC_CRLF | |
1035 | ||
1036 | /* | |
1037 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1038 | */ | |
1039 | #define VT100ID "\033[?1;2c" | |
1040 | #define VT102ID "\033[?6c" | |
1041 | ||
8ede5cce | 1042 | const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, |
1da177e4 LT |
1043 | 8,12,10,14, 9,13,11,15 }; |
1044 | ||
1045 | /* the default colour table, for VGA+ colour systems */ | |
91e74ca5 JS |
1046 | unsigned char default_red[] = { |
1047 | 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, | |
1048 | 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff | |
1049 | }; | |
1050 | module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); | |
1051 | ||
1052 | unsigned char default_grn[] = { | |
1053 | 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, | |
1054 | 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff | |
1055 | }; | |
1056 | module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); | |
1057 | ||
1058 | unsigned char default_blu[] = { | |
1059 | 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, | |
1060 | 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff | |
1061 | }; | |
1062 | module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR); | |
1c2bbe6a | 1063 | |
1da177e4 LT |
1064 | /* |
1065 | * gotoxy() must verify all boundaries, because the arguments | |
1066 | * might also be negative. If the given position is out of | |
1067 | * bounds, the cursor is placed at the nearest margin. | |
1068 | */ | |
1069 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) | |
1070 | { | |
1071 | int min_y, max_y; | |
1072 | ||
1073 | if (new_x < 0) | |
1074 | vc->vc_x = 0; | |
1075 | else { | |
1076 | if (new_x >= vc->vc_cols) | |
1077 | vc->vc_x = vc->vc_cols - 1; | |
1078 | else | |
1079 | vc->vc_x = new_x; | |
1080 | } | |
1081 | ||
1082 | if (vc->vc_decom) { | |
1083 | min_y = vc->vc_top; | |
1084 | max_y = vc->vc_bottom; | |
1085 | } else { | |
1086 | min_y = 0; | |
1087 | max_y = vc->vc_rows; | |
1088 | } | |
1089 | if (new_y < min_y) | |
1090 | vc->vc_y = min_y; | |
1091 | else if (new_y >= max_y) | |
1092 | vc->vc_y = max_y - 1; | |
1093 | else | |
1094 | vc->vc_y = new_y; | |
1095 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); | |
1096 | vc->vc_need_wrap = 0; | |
1097 | } | |
1098 | ||
1099 | /* for absolute user moves, when decom is set */ | |
1100 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) | |
1101 | { | |
1102 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); | |
1103 | } | |
1104 | ||
1b0ec88a | 1105 | void scrollback(struct vc_data *vc) |
1da177e4 | 1106 | { |
1b0ec88a | 1107 | scrolldelta(-(vc->vc_rows / 2)); |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | void scrollfront(struct vc_data *vc, int lines) | |
1111 | { | |
1112 | if (!lines) | |
1113 | lines = vc->vc_rows / 2; | |
1114 | scrolldelta(lines); | |
1115 | } | |
1116 | ||
1117 | static void lf(struct vc_data *vc) | |
1118 | { | |
1119 | /* don't scroll if above bottom of scrolling region, or | |
1120 | * if below scrolling region | |
1121 | */ | |
1122 | if (vc->vc_y + 1 == vc->vc_bottom) | |
1123 | scrup(vc, vc->vc_top, vc->vc_bottom, 1); | |
1124 | else if (vc->vc_y < vc->vc_rows - 1) { | |
1125 | vc->vc_y++; | |
1126 | vc->vc_pos += vc->vc_size_row; | |
1127 | } | |
1128 | vc->vc_need_wrap = 0; | |
b293d758 | 1129 | notify_write(vc, '\n'); |
1da177e4 LT |
1130 | } |
1131 | ||
1132 | static void ri(struct vc_data *vc) | |
1133 | { | |
1134 | /* don't scroll if below top of scrolling region, or | |
1135 | * if above scrolling region | |
1136 | */ | |
1137 | if (vc->vc_y == vc->vc_top) | |
1138 | scrdown(vc, vc->vc_top, vc->vc_bottom, 1); | |
1139 | else if (vc->vc_y > 0) { | |
1140 | vc->vc_y--; | |
1141 | vc->vc_pos -= vc->vc_size_row; | |
1142 | } | |
1143 | vc->vc_need_wrap = 0; | |
1144 | } | |
1145 | ||
1146 | static inline void cr(struct vc_data *vc) | |
1147 | { | |
1148 | vc->vc_pos -= vc->vc_x << 1; | |
1149 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1150 | notify_write(vc, '\r'); |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | static inline void bs(struct vc_data *vc) | |
1154 | { | |
1155 | if (vc->vc_x) { | |
1156 | vc->vc_pos -= 2; | |
1157 | vc->vc_x--; | |
1158 | vc->vc_need_wrap = 0; | |
b293d758 | 1159 | notify_write(vc, '\b'); |
1da177e4 LT |
1160 | } |
1161 | } | |
1162 | ||
1163 | static inline void del(struct vc_data *vc) | |
1164 | { | |
1165 | /* ignored */ | |
1166 | } | |
1167 | ||
1168 | static void csi_J(struct vc_data *vc, int vpar) | |
1169 | { | |
1170 | unsigned int count; | |
1171 | unsigned short * start; | |
1172 | ||
1173 | switch (vpar) { | |
1174 | case 0: /* erase from cursor to end of display */ | |
1175 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; | |
1176 | start = (unsigned short *)vc->vc_pos; | |
1da177e4 LT |
1177 | break; |
1178 | case 1: /* erase from start to cursor */ | |
1179 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; | |
1180 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 | 1181 | break; |
f8df13e0 PP |
1182 | case 3: /* erase scroll-back buffer (and whole display) */ |
1183 | scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, | |
42acfc66 | 1184 | vc->vc_screenbuf_size); |
f8df13e0 | 1185 | set_origin(vc); |
6ca8dfd7 | 1186 | if (con_is_visible(vc)) |
0930b095 | 1187 | update_screen(vc); |
f8df13e0 | 1188 | /* fall through */ |
1da177e4 LT |
1189 | case 2: /* erase whole display */ |
1190 | count = vc->vc_cols * vc->vc_rows; | |
1191 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 LT |
1192 | break; |
1193 | default: | |
1194 | return; | |
1195 | } | |
1196 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
6ca8dfd7 | 1197 | if (con_should_update(vc)) |
81732c3b | 1198 | do_update_region(vc, (unsigned long) start, count); |
1da177e4 LT |
1199 | vc->vc_need_wrap = 0; |
1200 | } | |
1201 | ||
1202 | static void csi_K(struct vc_data *vc, int vpar) | |
1203 | { | |
1204 | unsigned int count; | |
1205 | unsigned short * start; | |
1206 | ||
1207 | switch (vpar) { | |
1208 | case 0: /* erase from cursor to end of line */ | |
1209 | count = vc->vc_cols - vc->vc_x; | |
1210 | start = (unsigned short *)vc->vc_pos; | |
1da177e4 LT |
1211 | break; |
1212 | case 1: /* erase from start of line to cursor */ | |
1213 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1214 | count = vc->vc_x + 1; | |
1da177e4 LT |
1215 | break; |
1216 | case 2: /* erase whole line */ | |
1217 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1218 | count = vc->vc_cols; | |
1da177e4 LT |
1219 | break; |
1220 | default: | |
1221 | return; | |
1222 | } | |
1223 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1224 | vc->vc_need_wrap = 0; | |
6ca8dfd7 | 1225 | if (con_should_update(vc)) |
81732c3b | 1226 | do_update_region(vc, (unsigned long) start, count); |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1230 | { /* not vt100? */ | |
1231 | int count; | |
1232 | ||
1233 | if (!vpar) | |
1234 | vpar++; | |
1235 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1236 | ||
1237 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); | |
6ca8dfd7 | 1238 | if (con_should_update(vc)) |
1da177e4 LT |
1239 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); |
1240 | vc->vc_need_wrap = 0; | |
1241 | } | |
1242 | ||
1243 | static void default_attr(struct vc_data *vc) | |
1244 | { | |
1245 | vc->vc_intensity = 1; | |
fa6ce9ab | 1246 | vc->vc_italic = 0; |
1da177e4 LT |
1247 | vc->vc_underline = 0; |
1248 | vc->vc_reverse = 0; | |
1249 | vc->vc_blink = 0; | |
1250 | vc->vc_color = vc->vc_def_color; | |
1251 | } | |
1252 | ||
cec5b2a9 AB |
1253 | struct rgb { u8 r; u8 g; u8 b; }; |
1254 | ||
0f91e142 | 1255 | static void rgb_from_256(int i, struct rgb *c) |
cec5b2a9 | 1256 | { |
cec5b2a9 | 1257 | if (i < 8) { /* Standard colours. */ |
0f91e142 JS |
1258 | c->r = i&1 ? 0xaa : 0x00; |
1259 | c->g = i&2 ? 0xaa : 0x00; | |
1260 | c->b = i&4 ? 0xaa : 0x00; | |
cec5b2a9 | 1261 | } else if (i < 16) { |
0f91e142 JS |
1262 | c->r = i&1 ? 0xff : 0x55; |
1263 | c->g = i&2 ? 0xff : 0x55; | |
1264 | c->b = i&4 ? 0xff : 0x55; | |
cec5b2a9 | 1265 | } else if (i < 232) { /* 6x6x6 colour cube. */ |
0f91e142 JS |
1266 | c->r = (i - 16) / 36 * 85 / 2; |
1267 | c->g = (i - 16) / 6 % 6 * 85 / 2; | |
1268 | c->b = (i - 16) % 6 * 85 / 2; | |
cec5b2a9 | 1269 | } else /* Grayscale ramp. */ |
0f91e142 | 1270 | c->r = c->g = c->b = i * 10 - 2312; |
cec5b2a9 AB |
1271 | } |
1272 | ||
0f91e142 | 1273 | static void rgb_foreground(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 | 1274 | { |
193df022 JS |
1275 | u8 hue = 0, max = max3(c->r, c->g, c->b); |
1276 | ||
1277 | if (c->r > max / 2) | |
1278 | hue |= 4; | |
1279 | if (c->g > max / 2) | |
1280 | hue |= 2; | |
1281 | if (c->b > max / 2) | |
1282 | hue |= 1; | |
1283 | ||
1284 | if (hue == 7 && max <= 0x55) { | |
1285 | hue = 0; | |
1286 | vc->vc_intensity = 2; | |
1287 | } else if (max > 0xaa) | |
1288 | vc->vc_intensity = 2; | |
cec5b2a9 | 1289 | else |
193df022 JS |
1290 | vc->vc_intensity = 1; |
1291 | ||
cec5b2a9 AB |
1292 | vc->vc_color = (vc->vc_color & 0xf0) | hue; |
1293 | } | |
1294 | ||
0f91e142 | 1295 | static void rgb_background(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 AB |
1296 | { |
1297 | /* For backgrounds, err on the dark side. */ | |
1298 | vc->vc_color = (vc->vc_color & 0x0f) | |
0f91e142 | 1299 | | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3; |
cec5b2a9 AB |
1300 | } |
1301 | ||
e05ab238 JS |
1302 | /* |
1303 | * ITU T.416 Higher colour modes. They break the usual properties of SGR codes | |
1304 | * and thus need to be detected and ignored by hand. Strictly speaking, that | |
1305 | * standard also wants : rather than ; as separators, contrary to ECMA-48, but | |
1306 | * no one produces such codes and almost no one accepts them. | |
1307 | * | |
1308 | * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in | |
1309 | * supporting them. | |
1310 | */ | |
1311 | static int vc_t416_color(struct vc_data *vc, int i, | |
0f91e142 | 1312 | void(*set_color)(struct vc_data *vc, const struct rgb *c)) |
e05ab238 | 1313 | { |
0f91e142 JS |
1314 | struct rgb c; |
1315 | ||
e05ab238 JS |
1316 | i++; |
1317 | if (i > vc->vc_npar) | |
1318 | return i; | |
1319 | ||
0bf1f4a8 | 1320 | if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) { |
3e7ec4a0 | 1321 | /* 256 colours */ |
e05ab238 | 1322 | i++; |
0f91e142 | 1323 | rgb_from_256(vc->vc_par[i], &c); |
669e0a51 | 1324 | } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) { |
3e7ec4a0 | 1325 | /* 24 bit */ |
0f91e142 JS |
1326 | c.r = vc->vc_par[i + 1]; |
1327 | c.g = vc->vc_par[i + 2]; | |
1328 | c.b = vc->vc_par[i + 3]; | |
e05ab238 | 1329 | i += 3; |
0f91e142 JS |
1330 | } else |
1331 | return i; | |
1332 | ||
1333 | set_color(vc, &c); | |
e05ab238 JS |
1334 | |
1335 | return i; | |
1336 | } | |
1337 | ||
ac751efa | 1338 | /* console_lock is held */ |
1da177e4 LT |
1339 | static void csi_m(struct vc_data *vc) |
1340 | { | |
1341 | int i; | |
1342 | ||
1343 | for (i = 0; i <= vc->vc_npar; i++) | |
1344 | switch (vc->vc_par[i]) { | |
aada0a34 JS |
1345 | case 0: /* all attributes off */ |
1346 | default_attr(vc); | |
1347 | break; | |
1348 | case 1: | |
1349 | vc->vc_intensity = 2; | |
1350 | break; | |
1351 | case 2: | |
1352 | vc->vc_intensity = 0; | |
1353 | break; | |
1354 | case 3: | |
1355 | vc->vc_italic = 1; | |
1356 | break; | |
1357 | case 4: | |
1358 | vc->vc_underline = 1; | |
1359 | break; | |
1360 | case 5: | |
1361 | vc->vc_blink = 1; | |
1362 | break; | |
1363 | case 7: | |
1364 | vc->vc_reverse = 1; | |
1365 | break; | |
1366 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1367 | * Select primary font, don't display control chars if | |
1368 | * defined, don't set bit 8 on output. | |
1369 | */ | |
1370 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1371 | ? vc->vc_G0_charset | |
1372 | : vc->vc_G1_charset, vc); | |
1373 | vc->vc_disp_ctrl = 0; | |
1374 | vc->vc_toggle_meta = 0; | |
1375 | break; | |
1376 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1377 | * Select first alternate font, lets chars < 32 be | |
1378 | * displayed as ROM chars. | |
1379 | */ | |
1380 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1381 | vc->vc_disp_ctrl = 1; | |
1382 | vc->vc_toggle_meta = 0; | |
1383 | break; | |
1384 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1385 | * Select second alternate font, toggle high bit | |
1386 | * before displaying as ROM char. | |
1387 | */ | |
1388 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1389 | vc->vc_disp_ctrl = 1; | |
1390 | vc->vc_toggle_meta = 1; | |
1391 | break; | |
1392 | case 21: | |
1393 | case 22: | |
1394 | vc->vc_intensity = 1; | |
1395 | break; | |
1396 | case 23: | |
1397 | vc->vc_italic = 0; | |
1398 | break; | |
1399 | case 24: | |
1400 | vc->vc_underline = 0; | |
1401 | break; | |
1402 | case 25: | |
1403 | vc->vc_blink = 0; | |
1404 | break; | |
1405 | case 27: | |
1406 | vc->vc_reverse = 0; | |
1407 | break; | |
1408 | case 38: | |
1409 | i = vc_t416_color(vc, i, rgb_foreground); | |
1410 | break; | |
1411 | case 48: | |
1412 | i = vc_t416_color(vc, i, rgb_background); | |
1413 | break; | |
1414 | case 39: | |
1415 | vc->vc_color = (vc->vc_def_color & 0x0f) | | |
1416 | (vc->vc_color & 0xf0); | |
1417 | break; | |
1418 | case 49: | |
1419 | vc->vc_color = (vc->vc_def_color & 0xf0) | | |
1420 | (vc->vc_color & 0x0f); | |
1421 | break; | |
1422 | default: | |
fadb4244 AB |
1423 | if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) { |
1424 | if (vc->vc_par[i] < 100) | |
1425 | vc->vc_intensity = 2; | |
cc67dc28 AB |
1426 | vc->vc_par[i] -= 60; |
1427 | } | |
aada0a34 JS |
1428 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
1429 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1430 | | (vc->vc_color & 0xf0); | |
1431 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1432 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1433 | | (vc->vc_color & 0x0f); | |
1434 | break; | |
1da177e4 LT |
1435 | } |
1436 | update_attr(vc); | |
1437 | } | |
1438 | ||
6732c8bb | 1439 | static void respond_string(const char *p, struct tty_port *port) |
1da177e4 LT |
1440 | { |
1441 | while (*p) { | |
6732c8bb | 1442 | tty_insert_flip_char(port, *p, 0); |
1da177e4 LT |
1443 | p++; |
1444 | } | |
6732c8bb | 1445 | tty_schedule_flip(port); |
1da177e4 LT |
1446 | } |
1447 | ||
1448 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1449 | { | |
1450 | char buf[40]; | |
1451 | ||
1452 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
6732c8bb | 1453 | respond_string(buf, tty->port); |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | static inline void status_report(struct tty_struct *tty) | |
1457 | { | |
6732c8bb | 1458 | respond_string("\033[0n", tty->port); /* Terminal ok */ |
1da177e4 LT |
1459 | } |
1460 | ||
6732c8bb | 1461 | static inline void respond_ID(struct tty_struct *tty) |
1da177e4 | 1462 | { |
6732c8bb | 1463 | respond_string(VT102ID, tty->port); |
1da177e4 LT |
1464 | } |
1465 | ||
1466 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1467 | { | |
1468 | char buf[8]; | |
1469 | ||
1470 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1471 | (char)('!' + mry)); | |
6732c8bb | 1472 | respond_string(buf, tty->port); |
1da177e4 LT |
1473 | } |
1474 | ||
1475 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ | |
1476 | int mouse_reporting(void) | |
1477 | { | |
1478 | return vc_cons[fg_console].d->vc_report_mouse; | |
1479 | } | |
1480 | ||
ac751efa | 1481 | /* console_lock is held */ |
1da177e4 LT |
1482 | static void set_mode(struct vc_data *vc, int on_off) |
1483 | { | |
1484 | int i; | |
1485 | ||
1486 | for (i = 0; i <= vc->vc_npar; i++) | |
1487 | if (vc->vc_ques) { | |
1488 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ | |
1489 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1490 | if (on_off) | |
1491 | set_kbd(vc, decckm); | |
1492 | else | |
1493 | clr_kbd(vc, decckm); | |
1494 | break; | |
1495 | case 3: /* 80/132 mode switch unimplemented */ | |
1da177e4 LT |
1496 | #if 0 |
1497 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1498 | /* this alone does not suffice; some user mode | |
1499 | utility has to change the hardware regs */ | |
1500 | #endif | |
1501 | break; | |
1502 | case 5: /* Inverted screen on/off */ | |
1503 | if (vc->vc_decscnm != on_off) { | |
1504 | vc->vc_decscnm = on_off; | |
1505 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1506 | update_attr(vc); | |
1507 | } | |
1508 | break; | |
1509 | case 6: /* Origin relative/absolute */ | |
1510 | vc->vc_decom = on_off; | |
1511 | gotoxay(vc, 0, 0); | |
1512 | break; | |
1513 | case 7: /* Autowrap on/off */ | |
1514 | vc->vc_decawm = on_off; | |
1515 | break; | |
1516 | case 8: /* Autorepeat on/off */ | |
1517 | if (on_off) | |
1518 | set_kbd(vc, decarm); | |
1519 | else | |
1520 | clr_kbd(vc, decarm); | |
1521 | break; | |
1522 | case 9: | |
1523 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1524 | break; | |
1525 | case 25: /* Cursor on/off */ | |
1526 | vc->vc_deccm = on_off; | |
1527 | break; | |
1528 | case 1000: | |
1529 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1530 | break; | |
1531 | } | |
1532 | } else { | |
1533 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1534 | case 3: /* Monitor (display ctrls) */ | |
1535 | vc->vc_disp_ctrl = on_off; | |
1536 | break; | |
1537 | case 4: /* Insert Mode on/off */ | |
1538 | vc->vc_decim = on_off; | |
1539 | break; | |
1540 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1541 | if (on_off) | |
1542 | set_kbd(vc, lnm); | |
1543 | else | |
1544 | clr_kbd(vc, lnm); | |
1545 | break; | |
1546 | } | |
1547 | } | |
1548 | } | |
1549 | ||
ac751efa | 1550 | /* console_lock is held */ |
1da177e4 LT |
1551 | static void setterm_command(struct vc_data *vc) |
1552 | { | |
1553 | switch(vc->vc_par[0]) { | |
1554 | case 1: /* set color for underline mode */ | |
1555 | if (vc->vc_can_do_color && | |
1556 | vc->vc_par[1] < 16) { | |
1557 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1558 | if (vc->vc_underline) | |
1559 | update_attr(vc); | |
1560 | } | |
1561 | break; | |
1562 | case 2: /* set color for half intensity mode */ | |
1563 | if (vc->vc_can_do_color && | |
1564 | vc->vc_par[1] < 16) { | |
1565 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1566 | if (vc->vc_intensity == 0) | |
1567 | update_attr(vc); | |
1568 | } | |
1569 | break; | |
1570 | case 8: /* store colors as defaults */ | |
1571 | vc->vc_def_color = vc->vc_attr; | |
1572 | if (vc->vc_hi_font_mask == 0x100) | |
1573 | vc->vc_def_color >>= 1; | |
1574 | default_attr(vc); | |
1575 | update_attr(vc); | |
1576 | break; | |
1577 | case 9: /* set blanking interval */ | |
f324edc8 | 1578 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; |
1da177e4 LT |
1579 | poke_blanked_console(); |
1580 | break; | |
1581 | case 10: /* set bell frequency in Hz */ | |
1582 | if (vc->vc_npar >= 1) | |
1583 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1584 | else | |
1585 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1586 | break; | |
1587 | case 11: /* set bell duration in msec */ | |
1588 | if (vc->vc_npar >= 1) | |
1589 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
3372ec28 | 1590 | msecs_to_jiffies(vc->vc_par[1]) : 0; |
1da177e4 LT |
1591 | else |
1592 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1593 | break; | |
1594 | case 12: /* bring specified console to the front */ | |
1595 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1596 | set_console(vc->vc_par[1] - 1); | |
1597 | break; | |
1598 | case 13: /* unblank the screen */ | |
1599 | poke_blanked_console(); | |
1600 | break; | |
1601 | case 14: /* set vesa powerdown interval */ | |
1602 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1603 | break; | |
1604 | case 15: /* activate the previous console */ | |
1605 | set_console(last_console); | |
1606 | break; | |
bd63364c SD |
1607 | case 16: /* set cursor blink duration in msec */ |
1608 | if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && | |
1609 | vc->vc_par[1] <= USHRT_MAX) | |
1610 | vc->vc_cur_blink_ms = vc->vc_par[1]; | |
1611 | else | |
1612 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; | |
1613 | break; | |
1da177e4 LT |
1614 | } |
1615 | } | |
1616 | ||
ac751efa | 1617 | /* console_lock is held */ |
1da177e4 LT |
1618 | static void csi_at(struct vc_data *vc, unsigned int nr) |
1619 | { | |
1620 | if (nr > vc->vc_cols - vc->vc_x) | |
1621 | nr = vc->vc_cols - vc->vc_x; | |
1622 | else if (!nr) | |
1623 | nr = 1; | |
1624 | insert_char(vc, nr); | |
1625 | } | |
1626 | ||
ac751efa | 1627 | /* console_lock is held */ |
1da177e4 LT |
1628 | static void csi_L(struct vc_data *vc, unsigned int nr) |
1629 | { | |
1630 | if (nr > vc->vc_rows - vc->vc_y) | |
1631 | nr = vc->vc_rows - vc->vc_y; | |
1632 | else if (!nr) | |
1633 | nr = 1; | |
1634 | scrdown(vc, vc->vc_y, vc->vc_bottom, nr); | |
1635 | vc->vc_need_wrap = 0; | |
1636 | } | |
1637 | ||
ac751efa | 1638 | /* console_lock is held */ |
1da177e4 LT |
1639 | static void csi_P(struct vc_data *vc, unsigned int nr) |
1640 | { | |
1641 | if (nr > vc->vc_cols - vc->vc_x) | |
1642 | nr = vc->vc_cols - vc->vc_x; | |
1643 | else if (!nr) | |
1644 | nr = 1; | |
1645 | delete_char(vc, nr); | |
1646 | } | |
1647 | ||
ac751efa | 1648 | /* console_lock is held */ |
1da177e4 LT |
1649 | static void csi_M(struct vc_data *vc, unsigned int nr) |
1650 | { | |
1651 | if (nr > vc->vc_rows - vc->vc_y) | |
1652 | nr = vc->vc_rows - vc->vc_y; | |
1653 | else if (!nr) | |
1654 | nr=1; | |
1655 | scrup(vc, vc->vc_y, vc->vc_bottom, nr); | |
1656 | vc->vc_need_wrap = 0; | |
1657 | } | |
1658 | ||
ac751efa | 1659 | /* console_lock is held (except via vc_init->reset_terminal */ |
1da177e4 LT |
1660 | static void save_cur(struct vc_data *vc) |
1661 | { | |
1662 | vc->vc_saved_x = vc->vc_x; | |
1663 | vc->vc_saved_y = vc->vc_y; | |
1664 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 1665 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
1666 | vc->vc_s_underline = vc->vc_underline; |
1667 | vc->vc_s_blink = vc->vc_blink; | |
1668 | vc->vc_s_reverse = vc->vc_reverse; | |
1669 | vc->vc_s_charset = vc->vc_charset; | |
1670 | vc->vc_s_color = vc->vc_color; | |
1671 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
1672 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
1673 | } | |
1674 | ||
ac751efa | 1675 | /* console_lock is held */ |
1da177e4 LT |
1676 | static void restore_cur(struct vc_data *vc) |
1677 | { | |
1678 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
1679 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 1680 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
1681 | vc->vc_underline = vc->vc_s_underline; |
1682 | vc->vc_blink = vc->vc_s_blink; | |
1683 | vc->vc_reverse = vc->vc_s_reverse; | |
1684 | vc->vc_charset = vc->vc_s_charset; | |
1685 | vc->vc_color = vc->vc_s_color; | |
1686 | vc->vc_G0_charset = vc->vc_saved_G0; | |
1687 | vc->vc_G1_charset = vc->vc_saved_G1; | |
1688 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
1689 | update_attr(vc); | |
1690 | vc->vc_need_wrap = 0; | |
1691 | } | |
1692 | ||
b290af68 | 1693 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, |
1da177e4 | 1694 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, |
63f3a16d | 1695 | ESpalette, ESosc }; |
1da177e4 | 1696 | |
ac751efa | 1697 | /* console_lock is held (except via vc_init()) */ |
1da177e4 LT |
1698 | static void reset_terminal(struct vc_data *vc, int do_clear) |
1699 | { | |
1700 | vc->vc_top = 0; | |
1701 | vc->vc_bottom = vc->vc_rows; | |
1702 | vc->vc_state = ESnormal; | |
1703 | vc->vc_ques = 0; | |
1704 | vc->vc_translate = set_translate(LAT1_MAP, vc); | |
1705 | vc->vc_G0_charset = LAT1_MAP; | |
1706 | vc->vc_G1_charset = GRAF_MAP; | |
1707 | vc->vc_charset = 0; | |
1708 | vc->vc_need_wrap = 0; | |
1709 | vc->vc_report_mouse = 0; | |
042f10ec | 1710 | vc->vc_utf = default_utf8; |
1da177e4 LT |
1711 | vc->vc_utf_count = 0; |
1712 | ||
1713 | vc->vc_disp_ctrl = 0; | |
1714 | vc->vc_toggle_meta = 0; | |
1715 | ||
1716 | vc->vc_decscnm = 0; | |
1717 | vc->vc_decom = 0; | |
1718 | vc->vc_decawm = 1; | |
f6c06b68 | 1719 | vc->vc_deccm = global_cursor_default; |
1da177e4 LT |
1720 | vc->vc_decim = 0; |
1721 | ||
079c9534 | 1722 | vt_reset_keyboard(vc->vc_num); |
1da177e4 | 1723 | |
9ea9a886 | 1724 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1725 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1726 | ||
1727 | default_attr(vc); | |
1728 | update_attr(vc); | |
1729 | ||
1730 | vc->vc_tab_stop[0] = 0x01010100; | |
1731 | vc->vc_tab_stop[1] = | |
1732 | vc->vc_tab_stop[2] = | |
1733 | vc->vc_tab_stop[3] = | |
a564738c WK |
1734 | vc->vc_tab_stop[4] = |
1735 | vc->vc_tab_stop[5] = | |
1736 | vc->vc_tab_stop[6] = | |
1737 | vc->vc_tab_stop[7] = 0x01010101; | |
1da177e4 LT |
1738 | |
1739 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1740 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
bd63364c | 1741 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
1742 | |
1743 | gotoxy(vc, 0, 0); | |
1744 | save_cur(vc); | |
1745 | if (do_clear) | |
1746 | csi_J(vc, 2); | |
1747 | } | |
1748 | ||
ac751efa | 1749 | /* console_lock is held */ |
1da177e4 LT |
1750 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
1751 | { | |
1752 | /* | |
1753 | * Control characters can be used in the _middle_ | |
1754 | * of an escape sequence. | |
1755 | */ | |
63f3a16d AB |
1756 | if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ |
1757 | return; | |
1da177e4 LT |
1758 | switch (c) { |
1759 | case 0: | |
1760 | return; | |
1761 | case 7: | |
63f3a16d AB |
1762 | if (vc->vc_state == ESosc) |
1763 | vc->vc_state = ESnormal; | |
1764 | else if (vc->vc_bell_duration) | |
1da177e4 LT |
1765 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); |
1766 | return; | |
1767 | case 8: | |
1768 | bs(vc); | |
1769 | return; | |
1770 | case 9: | |
1771 | vc->vc_pos -= (vc->vc_x << 1); | |
1772 | while (vc->vc_x < vc->vc_cols - 1) { | |
1773 | vc->vc_x++; | |
1774 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) | |
1775 | break; | |
1776 | } | |
1777 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 1778 | notify_write(vc, '\t'); |
1da177e4 LT |
1779 | return; |
1780 | case 10: case 11: case 12: | |
1781 | lf(vc); | |
1782 | if (!is_kbd(vc, lnm)) | |
1783 | return; | |
1784 | case 13: | |
1785 | cr(vc); | |
1786 | return; | |
1787 | case 14: | |
1788 | vc->vc_charset = 1; | |
1789 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
1790 | vc->vc_disp_ctrl = 1; | |
1791 | return; | |
1792 | case 15: | |
1793 | vc->vc_charset = 0; | |
1794 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
1795 | vc->vc_disp_ctrl = 0; | |
1796 | return; | |
1797 | case 24: case 26: | |
1798 | vc->vc_state = ESnormal; | |
1799 | return; | |
1800 | case 27: | |
1801 | vc->vc_state = ESesc; | |
1802 | return; | |
1803 | case 127: | |
1804 | del(vc); | |
1805 | return; | |
1806 | case 128+27: | |
1807 | vc->vc_state = ESsquare; | |
1808 | return; | |
1809 | } | |
1810 | switch(vc->vc_state) { | |
1811 | case ESesc: | |
1812 | vc->vc_state = ESnormal; | |
1813 | switch (c) { | |
1814 | case '[': | |
1815 | vc->vc_state = ESsquare; | |
1816 | return; | |
1817 | case ']': | |
1818 | vc->vc_state = ESnonstd; | |
1819 | return; | |
1820 | case '%': | |
1821 | vc->vc_state = ESpercent; | |
1822 | return; | |
1823 | case 'E': | |
1824 | cr(vc); | |
1825 | lf(vc); | |
1826 | return; | |
1827 | case 'M': | |
1828 | ri(vc); | |
1829 | return; | |
1830 | case 'D': | |
1831 | lf(vc); | |
1832 | return; | |
1833 | case 'H': | |
1834 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); | |
1835 | return; | |
1836 | case 'Z': | |
1837 | respond_ID(tty); | |
1838 | return; | |
1839 | case '7': | |
1840 | save_cur(vc); | |
1841 | return; | |
1842 | case '8': | |
1843 | restore_cur(vc); | |
1844 | return; | |
1845 | case '(': | |
1846 | vc->vc_state = ESsetG0; | |
1847 | return; | |
1848 | case ')': | |
1849 | vc->vc_state = ESsetG1; | |
1850 | return; | |
1851 | case '#': | |
1852 | vc->vc_state = EShash; | |
1853 | return; | |
1854 | case 'c': | |
1855 | reset_terminal(vc, 1); | |
1856 | return; | |
1857 | case '>': /* Numeric keypad */ | |
1858 | clr_kbd(vc, kbdapplic); | |
1859 | return; | |
1860 | case '=': /* Appl. keypad */ | |
1861 | set_kbd(vc, kbdapplic); | |
1862 | return; | |
1863 | } | |
1864 | return; | |
1865 | case ESnonstd: | |
1866 | if (c=='P') { /* palette escape sequence */ | |
1867 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1868 | vc->vc_par[vc->vc_npar] = 0; | |
1869 | vc->vc_npar = 0; | |
1870 | vc->vc_state = ESpalette; | |
1871 | return; | |
1872 | } else if (c=='R') { /* reset palette */ | |
1873 | reset_palette(vc); | |
1874 | vc->vc_state = ESnormal; | |
63f3a16d AB |
1875 | } else if (c>='0' && c<='9') |
1876 | vc->vc_state = ESosc; | |
1877 | else | |
1da177e4 LT |
1878 | vc->vc_state = ESnormal; |
1879 | return; | |
1880 | case ESpalette: | |
74c807ce AS |
1881 | if (isxdigit(c)) { |
1882 | vc->vc_par[vc->vc_npar++] = hex_to_bin(c); | |
1da177e4 LT |
1883 | if (vc->vc_npar == 7) { |
1884 | int i = vc->vc_par[0] * 3, j = 1; | |
1885 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1886 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1887 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1888 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1889 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1890 | vc->vc_palette[i] += vc->vc_par[j]; | |
1891 | set_palette(vc); | |
1892 | vc->vc_state = ESnormal; | |
1893 | } | |
1894 | } else | |
1895 | vc->vc_state = ESnormal; | |
1896 | return; | |
1897 | case ESsquare: | |
1898 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1899 | vc->vc_par[vc->vc_npar] = 0; | |
1900 | vc->vc_npar = 0; | |
1901 | vc->vc_state = ESgetpars; | |
1902 | if (c == '[') { /* Function key */ | |
1903 | vc->vc_state=ESfunckey; | |
1904 | return; | |
1905 | } | |
1906 | vc->vc_ques = (c == '?'); | |
1907 | if (vc->vc_ques) | |
1908 | return; | |
1909 | case ESgetpars: | |
1910 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
1911 | vc->vc_npar++; | |
1912 | return; | |
1913 | } else if (c>='0' && c<='9') { | |
1914 | vc->vc_par[vc->vc_npar] *= 10; | |
1915 | vc->vc_par[vc->vc_npar] += c - '0'; | |
1916 | return; | |
b290af68 | 1917 | } |
1da177e4 LT |
1918 | vc->vc_state = ESnormal; |
1919 | switch(c) { | |
1920 | case 'h': | |
1921 | set_mode(vc, 1); | |
1922 | return; | |
1923 | case 'l': | |
1924 | set_mode(vc, 0); | |
1925 | return; | |
1926 | case 'c': | |
1927 | if (vc->vc_ques) { | |
1928 | if (vc->vc_par[0]) | |
1929 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
1930 | else | |
9ea9a886 | 1931 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1932 | return; |
1933 | } | |
1934 | break; | |
1935 | case 'm': | |
1936 | if (vc->vc_ques) { | |
1937 | clear_selection(); | |
1938 | if (vc->vc_par[0]) | |
1939 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
1940 | else | |
1941 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1942 | return; | |
1943 | } | |
1944 | break; | |
1945 | case 'n': | |
1946 | if (!vc->vc_ques) { | |
1947 | if (vc->vc_par[0] == 5) | |
1948 | status_report(tty); | |
1949 | else if (vc->vc_par[0] == 6) | |
1950 | cursor_report(vc, tty); | |
1951 | } | |
1952 | return; | |
1953 | } | |
1954 | if (vc->vc_ques) { | |
1955 | vc->vc_ques = 0; | |
1956 | return; | |
1957 | } | |
1958 | switch(c) { | |
1959 | case 'G': case '`': | |
1960 | if (vc->vc_par[0]) | |
1961 | vc->vc_par[0]--; | |
1962 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
1963 | return; | |
1964 | case 'A': | |
1965 | if (!vc->vc_par[0]) | |
1966 | vc->vc_par[0]++; | |
1967 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
1968 | return; | |
1969 | case 'B': case 'e': | |
1970 | if (!vc->vc_par[0]) | |
1971 | vc->vc_par[0]++; | |
1972 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
1973 | return; | |
1974 | case 'C': case 'a': | |
1975 | if (!vc->vc_par[0]) | |
1976 | vc->vc_par[0]++; | |
1977 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
1978 | return; | |
1979 | case 'D': | |
1980 | if (!vc->vc_par[0]) | |
1981 | vc->vc_par[0]++; | |
1982 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
1983 | return; | |
1984 | case 'E': | |
1985 | if (!vc->vc_par[0]) | |
1986 | vc->vc_par[0]++; | |
1987 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
1988 | return; | |
1989 | case 'F': | |
1990 | if (!vc->vc_par[0]) | |
1991 | vc->vc_par[0]++; | |
1992 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
1993 | return; | |
1994 | case 'd': | |
1995 | if (vc->vc_par[0]) | |
1996 | vc->vc_par[0]--; | |
1997 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
1998 | return; | |
1999 | case 'H': case 'f': | |
2000 | if (vc->vc_par[0]) | |
2001 | vc->vc_par[0]--; | |
2002 | if (vc->vc_par[1]) | |
2003 | vc->vc_par[1]--; | |
2004 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
2005 | return; | |
2006 | case 'J': | |
2007 | csi_J(vc, vc->vc_par[0]); | |
2008 | return; | |
2009 | case 'K': | |
2010 | csi_K(vc, vc->vc_par[0]); | |
2011 | return; | |
2012 | case 'L': | |
2013 | csi_L(vc, vc->vc_par[0]); | |
2014 | return; | |
2015 | case 'M': | |
2016 | csi_M(vc, vc->vc_par[0]); | |
2017 | return; | |
2018 | case 'P': | |
2019 | csi_P(vc, vc->vc_par[0]); | |
2020 | return; | |
2021 | case 'c': | |
2022 | if (!vc->vc_par[0]) | |
2023 | respond_ID(tty); | |
2024 | return; | |
2025 | case 'g': | |
2026 | if (!vc->vc_par[0]) | |
2027 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); | |
2028 | else if (vc->vc_par[0] == 3) { | |
2029 | vc->vc_tab_stop[0] = | |
2030 | vc->vc_tab_stop[1] = | |
2031 | vc->vc_tab_stop[2] = | |
2032 | vc->vc_tab_stop[3] = | |
a564738c WK |
2033 | vc->vc_tab_stop[4] = |
2034 | vc->vc_tab_stop[5] = | |
2035 | vc->vc_tab_stop[6] = | |
2036 | vc->vc_tab_stop[7] = 0; | |
1da177e4 LT |
2037 | } |
2038 | return; | |
2039 | case 'm': | |
2040 | csi_m(vc); | |
2041 | return; | |
2042 | case 'q': /* DECLL - but only 3 leds */ | |
2043 | /* map 0,1,2,3 to 0,1,2,4 */ | |
2044 | if (vc->vc_par[0] < 4) | |
079c9534 | 2045 | vt_set_led_state(vc->vc_num, |
1da177e4 LT |
2046 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
2047 | return; | |
2048 | case 'r': | |
2049 | if (!vc->vc_par[0]) | |
2050 | vc->vc_par[0]++; | |
2051 | if (!vc->vc_par[1]) | |
2052 | vc->vc_par[1] = vc->vc_rows; | |
2053 | /* Minimum allowed region is 2 lines */ | |
2054 | if (vc->vc_par[0] < vc->vc_par[1] && | |
2055 | vc->vc_par[1] <= vc->vc_rows) { | |
2056 | vc->vc_top = vc->vc_par[0] - 1; | |
2057 | vc->vc_bottom = vc->vc_par[1]; | |
2058 | gotoxay(vc, 0, 0); | |
2059 | } | |
2060 | return; | |
2061 | case 's': | |
2062 | save_cur(vc); | |
2063 | return; | |
2064 | case 'u': | |
2065 | restore_cur(vc); | |
2066 | return; | |
2067 | case 'X': | |
2068 | csi_X(vc, vc->vc_par[0]); | |
2069 | return; | |
2070 | case '@': | |
2071 | csi_at(vc, vc->vc_par[0]); | |
2072 | return; | |
2073 | case ']': /* setterm functions */ | |
2074 | setterm_command(vc); | |
2075 | return; | |
2076 | } | |
2077 | return; | |
2078 | case ESpercent: | |
2079 | vc->vc_state = ESnormal; | |
2080 | switch (c) { | |
2081 | case '@': /* defined in ISO 2022 */ | |
2082 | vc->vc_utf = 0; | |
2083 | return; | |
2084 | case 'G': /* prelim official escape code */ | |
2085 | case '8': /* retained for compatibility */ | |
2086 | vc->vc_utf = 1; | |
2087 | return; | |
2088 | } | |
2089 | return; | |
2090 | case ESfunckey: | |
2091 | vc->vc_state = ESnormal; | |
2092 | return; | |
2093 | case EShash: | |
2094 | vc->vc_state = ESnormal; | |
2095 | if (c == '8') { | |
2096 | /* DEC screen alignment test. kludge :-) */ | |
2097 | vc->vc_video_erase_char = | |
2098 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2099 | csi_J(vc, 2); | |
2100 | vc->vc_video_erase_char = | |
2101 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2102 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2103 | } | |
2104 | return; | |
2105 | case ESsetG0: | |
2106 | if (c == '0') | |
2107 | vc->vc_G0_charset = GRAF_MAP; | |
2108 | else if (c == 'B') | |
2109 | vc->vc_G0_charset = LAT1_MAP; | |
2110 | else if (c == 'U') | |
2111 | vc->vc_G0_charset = IBMPC_MAP; | |
2112 | else if (c == 'K') | |
2113 | vc->vc_G0_charset = USER_MAP; | |
2114 | if (vc->vc_charset == 0) | |
2115 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2116 | vc->vc_state = ESnormal; | |
2117 | return; | |
2118 | case ESsetG1: | |
2119 | if (c == '0') | |
2120 | vc->vc_G1_charset = GRAF_MAP; | |
2121 | else if (c == 'B') | |
2122 | vc->vc_G1_charset = LAT1_MAP; | |
2123 | else if (c == 'U') | |
2124 | vc->vc_G1_charset = IBMPC_MAP; | |
2125 | else if (c == 'K') | |
2126 | vc->vc_G1_charset = USER_MAP; | |
2127 | if (vc->vc_charset == 1) | |
2128 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2129 | vc->vc_state = ESnormal; | |
2130 | return; | |
63f3a16d AB |
2131 | case ESosc: |
2132 | return; | |
1da177e4 LT |
2133 | default: |
2134 | vc->vc_state = ESnormal; | |
2135 | } | |
2136 | } | |
2137 | ||
2f1a2ccb | 2138 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2139 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2140 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2141 | */ | |
2142 | struct interval { | |
2143 | uint32_t first; | |
2144 | uint32_t last; | |
2145 | }; | |
2146 | ||
2147 | static int bisearch(uint32_t ucs, const struct interval *table, int max) | |
2148 | { | |
2149 | int min = 0; | |
2150 | int mid; | |
2151 | ||
2152 | if (ucs < table[0].first || ucs > table[max].last) | |
2153 | return 0; | |
2154 | while (max >= min) { | |
2155 | mid = (min + max) / 2; | |
2156 | if (ucs > table[mid].last) | |
2157 | min = mid + 1; | |
2158 | else if (ucs < table[mid].first) | |
2159 | max = mid - 1; | |
2160 | else | |
2161 | return 1; | |
2162 | } | |
2163 | return 0; | |
2164 | } | |
2165 | ||
2166 | static int is_double_width(uint32_t ucs) | |
2167 | { | |
2168 | static const struct interval double_width[] = { | |
2169 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2170 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2171 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2172 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2173 | }; |
0f11541b | 2174 | return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
2f1a2ccb EK |
2175 | } |
2176 | ||
d711ea8f JS |
2177 | static void con_flush(struct vc_data *vc, unsigned long draw_from, |
2178 | unsigned long draw_to, int *draw_x) | |
2179 | { | |
2180 | if (*draw_x < 0) | |
2181 | return; | |
2182 | ||
2183 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, | |
2184 | (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x); | |
2185 | *draw_x = -1; | |
2186 | } | |
2187 | ||
ac751efa | 2188 | /* acquires console_lock */ |
1da177e4 LT |
2189 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
2190 | { | |
1da177e4 LT |
2191 | int c, tc, ok, n = 0, draw_x = -1; |
2192 | unsigned int currcons; | |
2193 | unsigned long draw_from = 0, draw_to = 0; | |
2194 | struct vc_data *vc; | |
2f1a2ccb | 2195 | unsigned char vc_attr; |
0341a4d0 | 2196 | struct vt_notifier_param param; |
2f1a2ccb EK |
2197 | uint8_t rescan; |
2198 | uint8_t inverse; | |
2199 | uint8_t width; | |
1da177e4 | 2200 | u16 himask, charmask; |
1da177e4 LT |
2201 | |
2202 | if (in_interrupt()) | |
2203 | return count; | |
2204 | ||
2205 | might_sleep(); | |
2206 | ||
ac751efa | 2207 | console_lock(); |
1da177e4 LT |
2208 | vc = tty->driver_data; |
2209 | if (vc == NULL) { | |
2210 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); | |
ac751efa | 2211 | console_unlock(); |
1da177e4 LT |
2212 | return 0; |
2213 | } | |
2214 | ||
2215 | currcons = vc->vc_num; | |
2216 | if (!vc_cons_allocated(currcons)) { | |
1ffdda95 MSB |
2217 | /* could this happen? */ |
2218 | pr_warn_once("con_write: tty %d not allocated\n", currcons+1); | |
2219 | console_unlock(); | |
2220 | return 0; | |
1da177e4 | 2221 | } |
1da177e4 | 2222 | |
1da177e4 LT |
2223 | himask = vc->vc_hi_font_mask; |
2224 | charmask = himask ? 0x1ff : 0xff; | |
2225 | ||
2226 | /* undraw cursor first */ | |
6ca8dfd7 | 2227 | if (con_is_fg(vc)) |
1da177e4 LT |
2228 | hide_cursor(vc); |
2229 | ||
0341a4d0 KD |
2230 | param.vc = vc; |
2231 | ||
1da177e4 LT |
2232 | while (!tty->stopped && count) { |
2233 | int orig = *buf; | |
2234 | c = orig; | |
2235 | buf++; | |
2236 | n++; | |
2237 | count--; | |
2f1a2ccb EK |
2238 | rescan = 0; |
2239 | inverse = 0; | |
2240 | width = 1; | |
1da177e4 LT |
2241 | |
2242 | /* Do no translation at all in control states */ | |
2243 | if (vc->vc_state != ESnormal) { | |
2244 | tc = c; | |
d4328b40 | 2245 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2246 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2247 | * vc_utf_count is the number of continuation bytes still | |
2248 | * expected to arrive. | |
2249 | * vc_npar is the number of continuation bytes arrived so | |
2250 | * far | |
2251 | */ | |
d4328b40 | 2252 | rescan_last_byte: |
2f1a2ccb EK |
2253 | if ((c & 0xc0) == 0x80) { |
2254 | /* Continuation byte received */ | |
2255 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2256 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2257 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2258 | vc->vc_npar++; | |
2259 | if (--vc->vc_utf_count) { | |
2260 | /* Still need some bytes */ | |
1da177e4 | 2261 | continue; |
2f1a2ccb EK |
2262 | } |
2263 | /* Got a whole character */ | |
2264 | c = vc->vc_utf_char; | |
2265 | /* Reject overlong sequences */ | |
2266 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2267 | c > utf8_length_changes[vc->vc_npar]) | |
2268 | c = 0xfffd; | |
2269 | } else { | |
2270 | /* Unexpected continuation byte */ | |
2271 | vc->vc_utf_count = 0; | |
2272 | c = 0xfffd; | |
2273 | } | |
1da177e4 | 2274 | } else { |
2f1a2ccb EK |
2275 | /* Single ASCII byte or first byte of a sequence received */ |
2276 | if (vc->vc_utf_count) { | |
2277 | /* Continuation byte expected */ | |
2278 | rescan = 1; | |
2279 | vc->vc_utf_count = 0; | |
2280 | c = 0xfffd; | |
2281 | } else if (c > 0x7f) { | |
2282 | /* First byte of a multibyte sequence received */ | |
2283 | vc->vc_npar = 0; | |
2284 | if ((c & 0xe0) == 0xc0) { | |
2285 | vc->vc_utf_count = 1; | |
2286 | vc->vc_utf_char = (c & 0x1f); | |
2287 | } else if ((c & 0xf0) == 0xe0) { | |
2288 | vc->vc_utf_count = 2; | |
2289 | vc->vc_utf_char = (c & 0x0f); | |
2290 | } else if ((c & 0xf8) == 0xf0) { | |
2291 | vc->vc_utf_count = 3; | |
2292 | vc->vc_utf_char = (c & 0x07); | |
2293 | } else if ((c & 0xfc) == 0xf8) { | |
2294 | vc->vc_utf_count = 4; | |
2295 | vc->vc_utf_char = (c & 0x03); | |
2296 | } else if ((c & 0xfe) == 0xfc) { | |
2297 | vc->vc_utf_count = 5; | |
2298 | vc->vc_utf_char = (c & 0x01); | |
2299 | } else { | |
2300 | /* 254 and 255 are invalid */ | |
2301 | c = 0xfffd; | |
2302 | } | |
2303 | if (vc->vc_utf_count) { | |
2304 | /* Still need some bytes */ | |
2305 | continue; | |
2306 | } | |
2307 | } | |
2308 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2309 | } |
2f1a2ccb EK |
2310 | /* End of UTF-8 decoding. */ |
2311 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2312 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2313 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2314 | c = 0xfffd; | |
2315 | tc = c; | |
d4328b40 | 2316 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2317 | tc = vc_translate(vc, c); |
1da177e4 LT |
2318 | } |
2319 | ||
0341a4d0 KD |
2320 | param.c = tc; |
2321 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2322 | ¶m) == NOTIFY_STOP) | |
2323 | continue; | |
2324 | ||
1da177e4 LT |
2325 | /* If the original code was a control character we |
2326 | * only allow a glyph to be displayed if the code is | |
2327 | * not normally used (such as for cursor movement) or | |
2328 | * if the disp_ctrl mode has been explicitly enabled. | |
2329 | * Certain characters (as given by the CTRL_ALWAYS | |
2330 | * bitmap) are always displayed as control characters, | |
2331 | * as the console would be pretty useless without | |
2332 | * them; to display an arbitrary font position use the | |
2333 | * direct-to-font zone in UTF-8 mode. | |
2334 | */ | |
2335 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2336 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2337 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2338 | && (c != 127 || vc->vc_disp_ctrl) |
2339 | && (c != 128+27); | |
2340 | ||
2341 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2342 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2343 | if (is_double_width(c)) | |
2344 | width = 2; | |
2345 | } | |
1da177e4 LT |
2346 | /* Now try to find out how to display it */ |
2347 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2348 | if (tc & ~charmask) { |
2f1a2ccb EK |
2349 | if (tc == -1 || tc == -2) { |
2350 | continue; /* nothing to display */ | |
2351 | } | |
2352 | /* Glyph not found */ | |
c0b79882 | 2353 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2354 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2355 | This would make absolutely no sense with Unicode in mind, |
2356 | but do this for ASCII characters since a font may lack | |
2357 | Unicode mapping info and we don't want to end up with | |
2358 | having question marks only. */ | |
2f1a2ccb EK |
2359 | tc = c; |
2360 | } else { | |
2361 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2362 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2363 | if (tc < 0) { | |
2364 | inverse = 1; | |
2365 | tc = conv_uni_to_pc(vc, '?'); | |
2366 | if (tc < 0) tc = '?'; | |
2367 | } | |
2368 | } | |
d4328b40 | 2369 | } |
1da177e4 | 2370 | |
2f1a2ccb EK |
2371 | if (!inverse) { |
2372 | vc_attr = vc->vc_attr; | |
1da177e4 | 2373 | } else { |
2f1a2ccb EK |
2374 | /* invert vc_attr */ |
2375 | if (!vc->vc_can_do_color) { | |
2376 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2377 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2378 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2379 | } else { | |
2380 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2381 | } | |
d711ea8f | 2382 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 | 2383 | } |
2f1a2ccb EK |
2384 | |
2385 | while (1) { | |
2386 | if (vc->vc_need_wrap || vc->vc_decim) | |
d711ea8f JS |
2387 | con_flush(vc, draw_from, draw_to, |
2388 | &draw_x); | |
2f1a2ccb EK |
2389 | if (vc->vc_need_wrap) { |
2390 | cr(vc); | |
2391 | lf(vc); | |
2392 | } | |
2393 | if (vc->vc_decim) | |
2394 | insert_char(vc, 1); | |
2395 | scr_writew(himask ? | |
2396 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2397 | (vc_attr << 8) + tc, | |
2398 | (u16 *) vc->vc_pos); | |
6ca8dfd7 | 2399 | if (con_should_update(vc) && draw_x < 0) { |
2f1a2ccb EK |
2400 | draw_x = vc->vc_x; |
2401 | draw_from = vc->vc_pos; | |
2402 | } | |
2403 | if (vc->vc_x == vc->vc_cols - 1) { | |
2404 | vc->vc_need_wrap = vc->vc_decawm; | |
2405 | draw_to = vc->vc_pos + 2; | |
2406 | } else { | |
2407 | vc->vc_x++; | |
2408 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2409 | } |
2f1a2ccb EK |
2410 | |
2411 | if (!--width) break; | |
2412 | ||
2413 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2414 | if (tc < 0) tc = ' '; | |
2415 | } | |
b293d758 | 2416 | notify_write(vc, c); |
2f1a2ccb | 2417 | |
d711ea8f JS |
2418 | if (inverse) |
2419 | con_flush(vc, draw_from, draw_to, &draw_x); | |
1ed8a2b3 | 2420 | |
2f1a2ccb EK |
2421 | if (rescan) { |
2422 | rescan = 0; | |
2423 | inverse = 0; | |
2424 | width = 1; | |
d4328b40 AT |
2425 | c = orig; |
2426 | goto rescan_last_byte; | |
2427 | } | |
1da177e4 LT |
2428 | continue; |
2429 | } | |
d711ea8f | 2430 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 LT |
2431 | do_con_trol(tty, vc, orig); |
2432 | } | |
d711ea8f | 2433 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 | 2434 | console_conditional_schedule(); |
ac751efa | 2435 | console_unlock(); |
b293d758 | 2436 | notify_update(vc); |
1da177e4 | 2437 | return n; |
1da177e4 LT |
2438 | } |
2439 | ||
2440 | /* | |
2441 | * This is the console switching callback. | |
2442 | * | |
2443 | * Doing console switching in a process context allows | |
2444 | * us to do the switches asynchronously (needed when we want | |
2445 | * to switch due to a keyboard interrupt). Synchronization | |
2446 | * with other console code and prevention of re-entrancy is | |
ac751efa | 2447 | * ensured with console_lock. |
1da177e4 | 2448 | */ |
65f27f38 | 2449 | static void console_callback(struct work_struct *ignored) |
1da177e4 | 2450 | { |
ac751efa | 2451 | console_lock(); |
1da177e4 LT |
2452 | |
2453 | if (want_console >= 0) { | |
2454 | if (want_console != fg_console && | |
2455 | vc_cons_allocated(want_console)) { | |
2456 | hide_cursor(vc_cons[fg_console].d); | |
2457 | change_console(vc_cons[want_console].d); | |
2458 | /* we only changed when the console had already | |
2459 | been allocated - a new console is not created | |
2460 | in an interrupt routine */ | |
2461 | } | |
2462 | want_console = -1; | |
2463 | } | |
2464 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2465 | do_poke_blanked_console = 0; | |
2466 | poke_blanked_console(); | |
2467 | } | |
2468 | if (scrollback_delta) { | |
2469 | struct vc_data *vc = vc_cons[fg_console].d; | |
2470 | clear_selection(); | |
97293de9 | 2471 | if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta) |
1da177e4 LT |
2472 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); |
2473 | scrollback_delta = 0; | |
2474 | } | |
2475 | if (blank_timer_expired) { | |
2476 | do_blank_screen(0); | |
2477 | blank_timer_expired = 0; | |
2478 | } | |
b293d758 | 2479 | notify_update(vc_cons[fg_console].d); |
1da177e4 | 2480 | |
ac751efa | 2481 | console_unlock(); |
1da177e4 LT |
2482 | } |
2483 | ||
b257bc05 | 2484 | int set_console(int nr) |
1da177e4 | 2485 | { |
b257bc05 AJ |
2486 | struct vc_data *vc = vc_cons[fg_console].d; |
2487 | ||
2488 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2489 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2490 | ||
2491 | /* | |
2492 | * Console switch will fail in console_callback() or | |
2493 | * change_console() so there is no point scheduling | |
2494 | * the callback | |
2495 | * | |
2496 | * Existing set_console() users don't check the return | |
2497 | * value so this shouldn't break anything | |
2498 | */ | |
2499 | return -EINVAL; | |
2500 | } | |
2501 | ||
1da177e4 LT |
2502 | want_console = nr; |
2503 | schedule_console_callback(); | |
b257bc05 AJ |
2504 | |
2505 | return 0; | |
1da177e4 LT |
2506 | } |
2507 | ||
2508 | struct tty_driver *console_driver; | |
2509 | ||
2510 | #ifdef CONFIG_VT_CONSOLE | |
2511 | ||
5ada918b BW |
2512 | /** |
2513 | * vt_kmsg_redirect() - Sets/gets the kernel message console | |
2514 | * @new: The new virtual terminal number or -1 if the console should stay | |
2515 | * unchanged | |
2516 | * | |
2517 | * By default, the kernel messages are always printed on the current virtual | |
2518 | * console. However, the user may modify that default with the | |
2519 | * TIOCL_SETKMSGREDIRECT ioctl call. | |
2520 | * | |
2521 | * This function sets the kernel message console to be @new. It returns the old | |
2522 | * virtual console number. The virtual terminal number 0 (both as parameter and | |
2523 | * return value) means no redirection (i.e. always printed on the currently | |
2524 | * active console). | |
2525 | * | |
2526 | * The parameter -1 means that only the current console is returned, but the | |
2527 | * value is not modified. You may use the macro vt_get_kmsg_redirect() in that | |
2528 | * case to make the code more understandable. | |
2529 | * | |
2530 | * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores | |
2531 | * the parameter and always returns 0. | |
2532 | */ | |
2533 | int vt_kmsg_redirect(int new) | |
2534 | { | |
2535 | static int kmsg_con; | |
2536 | ||
2537 | if (new != -1) | |
2538 | return xchg(&kmsg_con, new); | |
2539 | else | |
2540 | return kmsg_con; | |
2541 | } | |
2542 | ||
1da177e4 LT |
2543 | /* |
2544 | * Console on virtual terminal | |
2545 | * | |
2546 | * The console must be locked when we get here. | |
2547 | */ | |
2548 | ||
2549 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2550 | { | |
2551 | struct vc_data *vc = vc_cons[fg_console].d; | |
2552 | unsigned char c; | |
b0940003 | 2553 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 LT |
2554 | const ushort *start; |
2555 | ushort cnt = 0; | |
2556 | ushort myx; | |
5ada918b | 2557 | int kmsg_console; |
1da177e4 LT |
2558 | |
2559 | /* console busy or not yet initialized */ | |
b0940003 NP |
2560 | if (!printable) |
2561 | return; | |
2562 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2563 | return; |
2564 | ||
5ada918b BW |
2565 | kmsg_console = vt_get_kmsg_redirect(); |
2566 | if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) | |
2567 | vc = vc_cons[kmsg_console - 1].d; | |
1da177e4 LT |
2568 | |
2569 | /* read `x' only after setting currcons properly (otherwise | |
2570 | the `x' macro will read the x of the foreground console). */ | |
2571 | myx = vc->vc_x; | |
2572 | ||
2573 | if (!vc_cons_allocated(fg_console)) { | |
2574 | /* impossible */ | |
2575 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2576 | goto quit; | |
2577 | } | |
2578 | ||
8fd4bd22 | 2579 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
1da177e4 LT |
2580 | goto quit; |
2581 | ||
2582 | /* undraw cursor first */ | |
6ca8dfd7 | 2583 | if (con_is_fg(vc)) |
1da177e4 LT |
2584 | hide_cursor(vc); |
2585 | ||
2586 | start = (ushort *)vc->vc_pos; | |
2587 | ||
2588 | /* Contrived structure to try to emulate original need_wrap behaviour | |
2589 | * Problems caused when we have need_wrap set on '\n' character */ | |
2590 | while (count--) { | |
2591 | c = *b++; | |
2592 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
2593 | if (cnt > 0) { | |
6ca8dfd7 | 2594 | if (con_is_visible(vc)) |
1da177e4 LT |
2595 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2596 | vc->vc_x += cnt; | |
2597 | if (vc->vc_need_wrap) | |
2598 | vc->vc_x--; | |
2599 | cnt = 0; | |
2600 | } | |
2601 | if (c == 8) { /* backspace */ | |
2602 | bs(vc); | |
2603 | start = (ushort *)vc->vc_pos; | |
2604 | myx = vc->vc_x; | |
2605 | continue; | |
2606 | } | |
2607 | if (c != 13) | |
2608 | lf(vc); | |
2609 | cr(vc); | |
2610 | start = (ushort *)vc->vc_pos; | |
2611 | myx = vc->vc_x; | |
2612 | if (c == 10 || c == 13) | |
2613 | continue; | |
2614 | } | |
2615 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); | |
b293d758 | 2616 | notify_write(vc, c); |
1da177e4 LT |
2617 | cnt++; |
2618 | if (myx == vc->vc_cols - 1) { | |
2619 | vc->vc_need_wrap = 1; | |
2620 | continue; | |
2621 | } | |
2622 | vc->vc_pos += 2; | |
2623 | myx++; | |
2624 | } | |
2625 | if (cnt > 0) { | |
6ca8dfd7 | 2626 | if (con_is_visible(vc)) |
1da177e4 LT |
2627 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2628 | vc->vc_x += cnt; | |
2629 | if (vc->vc_x == vc->vc_cols) { | |
2630 | vc->vc_x--; | |
2631 | vc->vc_need_wrap = 1; | |
2632 | } | |
2633 | } | |
2634 | set_cursor(vc); | |
b293d758 | 2635 | notify_update(vc); |
1da177e4 LT |
2636 | |
2637 | quit: | |
b0940003 | 2638 | spin_unlock(&printing_lock); |
1da177e4 LT |
2639 | } |
2640 | ||
2641 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
2642 | { | |
2643 | *index = c->index ? c->index-1 : fg_console; | |
2644 | return console_driver; | |
2645 | } | |
2646 | ||
2647 | static struct console vt_console_driver = { | |
2648 | .name = "tty", | |
2649 | .write = vt_console_print, | |
2650 | .device = vt_console_device, | |
2651 | .unblank = unblank_screen, | |
2652 | .flags = CON_PRINTBUFFER, | |
2653 | .index = -1, | |
2654 | }; | |
2655 | #endif | |
2656 | ||
2657 | /* | |
2658 | * Handling of Linux-specific VC ioctls | |
2659 | */ | |
2660 | ||
2661 | /* | |
ac751efa | 2662 | * Generally a bit racy with respect to console_lock();. |
1da177e4 LT |
2663 | * |
2664 | * There are some functions which don't need it. | |
2665 | * | |
2666 | * There are some functions which can sleep for arbitrary periods | |
2667 | * (paste_selection) but we don't need the lock there anyway. | |
2668 | * | |
2669 | * set_selection has locking, and definitely needs it | |
2670 | */ | |
2671 | ||
2672 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
2673 | { | |
2674 | char type, data; | |
2675 | char __user *p = (char __user *)arg; | |
2676 | int lines; | |
2677 | int ret; | |
2678 | ||
1da177e4 LT |
2679 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
2680 | return -EPERM; | |
2681 | if (get_user(type, p)) | |
2682 | return -EFAULT; | |
2683 | ret = 0; | |
04f378b1 | 2684 | |
1da177e4 LT |
2685 | switch (type) |
2686 | { | |
2687 | case TIOCL_SETSEL: | |
ac751efa | 2688 | console_lock(); |
1da177e4 | 2689 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); |
ac751efa | 2690 | console_unlock(); |
1da177e4 LT |
2691 | break; |
2692 | case TIOCL_PASTESEL: | |
2693 | ret = paste_selection(tty); | |
2694 | break; | |
2695 | case TIOCL_UNBLANKSCREEN: | |
ac751efa | 2696 | console_lock(); |
1da177e4 | 2697 | unblank_screen(); |
ac751efa | 2698 | console_unlock(); |
1da177e4 LT |
2699 | break; |
2700 | case TIOCL_SELLOADLUT: | |
5289475d | 2701 | console_lock(); |
1da177e4 | 2702 | ret = sel_loadlut(p); |
5289475d | 2703 | console_unlock(); |
1da177e4 LT |
2704 | break; |
2705 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 2706 | |
1da177e4 LT |
2707 | /* |
2708 | * Make it possible to react to Shift+Mousebutton. | |
2709 | * Note that 'shift_state' is an undocumented | |
2710 | * kernel-internal variable; programs not closely | |
2711 | * related to the kernel should not use this. | |
2712 | */ | |
079c9534 | 2713 | data = vt_get_shift_state(); |
1da177e4 LT |
2714 | ret = __put_user(data, p); |
2715 | break; | |
2716 | case TIOCL_GETMOUSEREPORTING: | |
20f62579 | 2717 | console_lock(); /* May be overkill */ |
1da177e4 | 2718 | data = mouse_reporting(); |
20f62579 | 2719 | console_unlock(); |
1da177e4 LT |
2720 | ret = __put_user(data, p); |
2721 | break; | |
2722 | case TIOCL_SETVESABLANK: | |
20f62579 | 2723 | console_lock(); |
403aac96 | 2724 | ret = set_vesa_blanking(p); |
20f62579 | 2725 | console_unlock(); |
1da177e4 | 2726 | break; |
0ca07731 | 2727 | case TIOCL_GETKMSGREDIRECT: |
5ada918b | 2728 | data = vt_get_kmsg_redirect(); |
0ca07731 RW |
2729 | ret = __put_user(data, p); |
2730 | break; | |
1da177e4 LT |
2731 | case TIOCL_SETKMSGREDIRECT: |
2732 | if (!capable(CAP_SYS_ADMIN)) { | |
2733 | ret = -EPERM; | |
2734 | } else { | |
2735 | if (get_user(data, p+1)) | |
2736 | ret = -EFAULT; | |
2737 | else | |
5ada918b | 2738 | vt_kmsg_redirect(data); |
1da177e4 LT |
2739 | } |
2740 | break; | |
2741 | case TIOCL_GETFGCONSOLE: | |
20f62579 AC |
2742 | /* No locking needed as this is a transiently |
2743 | correct return anyway if the caller hasn't | |
2744 | disabled switching */ | |
1da177e4 LT |
2745 | ret = fg_console; |
2746 | break; | |
2747 | case TIOCL_SCROLLCONSOLE: | |
2748 | if (get_user(lines, (s32 __user *)(p+4))) { | |
2749 | ret = -EFAULT; | |
2750 | } else { | |
20f62579 AC |
2751 | /* Need the console lock here. Note that lots |
2752 | of other calls need fixing before the lock | |
2753 | is actually useful ! */ | |
2754 | console_lock(); | |
1da177e4 | 2755 | scrollfront(vc_cons[fg_console].d, lines); |
20f62579 | 2756 | console_unlock(); |
1da177e4 LT |
2757 | ret = 0; |
2758 | } | |
2759 | break; | |
2760 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
ac751efa | 2761 | console_lock(); |
1da177e4 LT |
2762 | ignore_poke = 1; |
2763 | do_blank_screen(0); | |
ac751efa | 2764 | console_unlock(); |
1da177e4 LT |
2765 | break; |
2766 | case TIOCL_BLANKEDSCREEN: | |
2767 | ret = console_blanked; | |
2768 | break; | |
2769 | default: | |
2770 | ret = -EINVAL; | |
2771 | break; | |
2772 | } | |
2773 | return ret; | |
2774 | } | |
2775 | ||
2776 | /* | |
2777 | * /dev/ttyN handling | |
2778 | */ | |
2779 | ||
2780 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2781 | { | |
2782 | int retval; | |
2783 | ||
2784 | retval = do_con_write(tty, buf, count); | |
2785 | con_flush_chars(tty); | |
2786 | ||
2787 | return retval; | |
2788 | } | |
2789 | ||
5d19f546 | 2790 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
2791 | { |
2792 | if (in_interrupt()) | |
5d19f546 AC |
2793 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
2794 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
2795 | } |
2796 | ||
2797 | static int con_write_room(struct tty_struct *tty) | |
2798 | { | |
2799 | if (tty->stopped) | |
2800 | return 0; | |
a88a69c9 | 2801 | return 32768; /* No limit, really; we're not buffering */ |
1da177e4 LT |
2802 | } |
2803 | ||
2804 | static int con_chars_in_buffer(struct tty_struct *tty) | |
2805 | { | |
2806 | return 0; /* we're not buffering */ | |
2807 | } | |
2808 | ||
2809 | /* | |
2810 | * con_throttle and con_unthrottle are only used for | |
2811 | * paste_selection(), which has to stuff in a large number of | |
2812 | * characters... | |
2813 | */ | |
2814 | static void con_throttle(struct tty_struct *tty) | |
2815 | { | |
2816 | } | |
2817 | ||
2818 | static void con_unthrottle(struct tty_struct *tty) | |
2819 | { | |
2820 | struct vc_data *vc = tty->driver_data; | |
2821 | ||
2822 | wake_up_interruptible(&vc->paste_wait); | |
2823 | } | |
2824 | ||
2825 | /* | |
2826 | * Turn the Scroll-Lock LED on when the tty is stopped | |
2827 | */ | |
2828 | static void con_stop(struct tty_struct *tty) | |
2829 | { | |
2830 | int console_num; | |
2831 | if (!tty) | |
2832 | return; | |
2833 | console_num = tty->index; | |
2834 | if (!vc_cons_allocated(console_num)) | |
2835 | return; | |
079c9534 | 2836 | vt_kbd_con_stop(console_num); |
1da177e4 LT |
2837 | } |
2838 | ||
2839 | /* | |
2840 | * Turn the Scroll-Lock LED off when the console is started | |
2841 | */ | |
2842 | static void con_start(struct tty_struct *tty) | |
2843 | { | |
2844 | int console_num; | |
2845 | if (!tty) | |
2846 | return; | |
2847 | console_num = tty->index; | |
2848 | if (!vc_cons_allocated(console_num)) | |
2849 | return; | |
079c9534 | 2850 | vt_kbd_con_start(console_num); |
1da177e4 LT |
2851 | } |
2852 | ||
2853 | static void con_flush_chars(struct tty_struct *tty) | |
2854 | { | |
2855 | struct vc_data *vc; | |
2856 | ||
2857 | if (in_interrupt()) /* from flush_to_ldisc */ | |
2858 | return; | |
2859 | ||
2860 | /* if we race with con_close(), vt may be null */ | |
ac751efa | 2861 | console_lock(); |
1da177e4 LT |
2862 | vc = tty->driver_data; |
2863 | if (vc) | |
2864 | set_cursor(vc); | |
ac751efa | 2865 | console_unlock(); |
1da177e4 LT |
2866 | } |
2867 | ||
2868 | /* | |
2869 | * Allocate the console screen memory. | |
2870 | */ | |
bc1e99d9 | 2871 | static int con_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 LT |
2872 | { |
2873 | unsigned int currcons = tty->index; | |
bc1e99d9 JS |
2874 | struct vc_data *vc; |
2875 | int ret; | |
1da177e4 | 2876 | |
ac751efa | 2877 | console_lock(); |
bc1e99d9 JS |
2878 | ret = vc_allocate(currcons); |
2879 | if (ret) | |
2880 | goto unlock; | |
feebed65 | 2881 | |
bc1e99d9 | 2882 | vc = vc_cons[currcons].d; |
1da177e4 | 2883 | |
bc1e99d9 JS |
2884 | /* Still being freed */ |
2885 | if (vc->port.tty) { | |
2886 | ret = -ERESTARTSYS; | |
2887 | goto unlock; | |
2888 | } | |
2889 | ||
2890 | ret = tty_port_install(&vc->port, driver, tty); | |
2891 | if (ret) | |
2892 | goto unlock; | |
2893 | ||
2894 | tty->driver_data = vc; | |
2895 | vc->port.tty = tty; | |
2896 | ||
2897 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
2898 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
2899 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
1da177e4 | 2900 | } |
bc1e99d9 | 2901 | if (vc->vc_utf) |
adc8d746 | 2902 | tty->termios.c_iflag |= IUTF8; |
bc1e99d9 | 2903 | else |
adc8d746 | 2904 | tty->termios.c_iflag &= ~IUTF8; |
bc1e99d9 | 2905 | unlock: |
ac751efa | 2906 | console_unlock(); |
1da177e4 LT |
2907 | return ret; |
2908 | } | |
2909 | ||
bc1e99d9 JS |
2910 | static int con_open(struct tty_struct *tty, struct file *filp) |
2911 | { | |
2912 | /* everything done in install */ | |
2913 | return 0; | |
2914 | } | |
2915 | ||
2916 | ||
1da177e4 LT |
2917 | static void con_close(struct tty_struct *tty, struct file *filp) |
2918 | { | |
feebed65 AC |
2919 | /* Nothing to do - we defer to shutdown */ |
2920 | } | |
1da177e4 | 2921 | |
feebed65 AC |
2922 | static void con_shutdown(struct tty_struct *tty) |
2923 | { | |
2924 | struct vc_data *vc = tty->driver_data; | |
2925 | BUG_ON(vc == NULL); | |
ac751efa | 2926 | console_lock(); |
8ce73264 | 2927 | vc->port.tty = NULL; |
ac751efa | 2928 | console_unlock(); |
1da177e4 LT |
2929 | } |
2930 | ||
3855ae1c | 2931 | static int default_color = 7; /* white */ |
fa6ce9ab JE |
2932 | static int default_italic_color = 2; // green (ASCII) |
2933 | static int default_underline_color = 3; // cyan (ASCII) | |
3855ae1c | 2934 | module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); |
fa6ce9ab JE |
2935 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); |
2936 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
2937 | ||
1da177e4 LT |
2938 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2939 | unsigned int cols, int do_clear) | |
2940 | { | |
2941 | int j, k ; | |
2942 | ||
2943 | vc->vc_cols = cols; | |
2944 | vc->vc_rows = rows; | |
2945 | vc->vc_size_row = cols << 1; | |
2946 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
2947 | ||
2948 | set_origin(vc); | |
2949 | vc->vc_pos = vc->vc_origin; | |
2950 | reset_vc(vc); | |
2951 | for (j=k=0; j<16; j++) { | |
2952 | vc->vc_palette[k++] = default_red[j] ; | |
2953 | vc->vc_palette[k++] = default_grn[j] ; | |
2954 | vc->vc_palette[k++] = default_blu[j] ; | |
2955 | } | |
3855ae1c | 2956 | vc->vc_def_color = default_color; |
fa6ce9ab JE |
2957 | vc->vc_ulcolor = default_underline_color; |
2958 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
2959 | vc->vc_halfcolor = 0x08; /* grey */ |
2960 | init_waitqueue_head(&vc->paste_wait); | |
2961 | reset_terminal(vc, do_clear); | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | * This routine initializes console interrupts, and does nothing | |
2966 | * else. If you want the screen to clear, call tty_write with | |
2967 | * the appropriate escape-sequence. | |
2968 | */ | |
2969 | ||
2970 | static int __init con_init(void) | |
2971 | { | |
2972 | const char *display_desc = NULL; | |
2973 | struct vc_data *vc; | |
3e795de7 | 2974 | unsigned int currcons = 0, i; |
1da177e4 | 2975 | |
ac751efa | 2976 | console_lock(); |
1da177e4 LT |
2977 | |
2978 | if (conswitchp) | |
2979 | display_desc = conswitchp->con_startup(); | |
2980 | if (!display_desc) { | |
2981 | fg_console = 0; | |
ac751efa | 2982 | console_unlock(); |
1da177e4 LT |
2983 | return 0; |
2984 | } | |
2985 | ||
3e795de7 AD |
2986 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
2987 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
2988 | ||
2989 | if (con_driver->con == NULL) { | |
2990 | con_driver->con = conswitchp; | |
2991 | con_driver->desc = display_desc; | |
2992 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
2993 | con_driver->first = 0; | |
2994 | con_driver->last = MAX_NR_CONSOLES - 1; | |
2995 | break; | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
3000 | con_driver_map[i] = conswitchp; | |
3001 | ||
1da177e4 LT |
3002 | if (blankinterval) { |
3003 | blank_state = blank_normal_wait; | |
f324edc8 | 3004 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3005 | } |
3006 | ||
1da177e4 | 3007 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
a5f4f52e | 3008 | vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
7f1f86a0 | 3009 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
ff917ba4 | 3010 | tty_port_init(&vc->port); |
1da177e4 | 3011 | visual_init(vc, currcons, 1); |
a5f4f52e | 3012 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
1da177e4 LT |
3013 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
3014 | currcons || !vc->vc_sw->con_save_screen); | |
3015 | } | |
3016 | currcons = fg_console = 0; | |
3017 | master_display_fg = vc = vc_cons[currcons].d; | |
3018 | set_origin(vc); | |
3019 | save_screen(vc); | |
3020 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
3021 | csi_J(vc, 0); | |
3022 | update_screen(vc); | |
5da527aa | 3023 | pr_info("Console: %s %s %dx%d\n", |
1da177e4 LT |
3024 | vc->vc_can_do_color ? "colour" : "mono", |
3025 | display_desc, vc->vc_cols, vc->vc_rows); | |
3026 | printable = 1; | |
1da177e4 | 3027 | |
ac751efa | 3028 | console_unlock(); |
1da177e4 LT |
3029 | |
3030 | #ifdef CONFIG_VT_CONSOLE | |
3031 | register_console(&vt_console_driver); | |
3032 | #endif | |
3033 | return 0; | |
3034 | } | |
3035 | console_initcall(con_init); | |
3036 | ||
b68e31d0 | 3037 | static const struct tty_operations con_ops = { |
bc1e99d9 | 3038 | .install = con_install, |
1da177e4 LT |
3039 | .open = con_open, |
3040 | .close = con_close, | |
3041 | .write = con_write, | |
3042 | .write_room = con_write_room, | |
3043 | .put_char = con_put_char, | |
3044 | .flush_chars = con_flush_chars, | |
3045 | .chars_in_buffer = con_chars_in_buffer, | |
3046 | .ioctl = vt_ioctl, | |
e9216651 AB |
3047 | #ifdef CONFIG_COMPAT |
3048 | .compat_ioctl = vt_compat_ioctl, | |
3049 | #endif | |
1da177e4 LT |
3050 | .stop = con_stop, |
3051 | .start = con_start, | |
3052 | .throttle = con_throttle, | |
3053 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 3054 | .resize = vt_resize, |
feebed65 | 3055 | .shutdown = con_shutdown |
1da177e4 LT |
3056 | }; |
3057 | ||
d81ed103 AC |
3058 | static struct cdev vc0_cdev; |
3059 | ||
fbc92a34 KS |
3060 | static ssize_t show_tty_active(struct device *dev, |
3061 | struct device_attribute *attr, char *buf) | |
3062 | { | |
3063 | return sprintf(buf, "tty%d\n", fg_console + 1); | |
3064 | } | |
3065 | static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); | |
3066 | ||
1083a7be TI |
3067 | static struct attribute *vt_dev_attrs[] = { |
3068 | &dev_attr_active.attr, | |
3069 | NULL | |
3070 | }; | |
3071 | ||
3072 | ATTRIBUTE_GROUPS(vt_dev); | |
3073 | ||
d81ed103 | 3074 | int __init vty_init(const struct file_operations *console_fops) |
1da177e4 | 3075 | { |
d81ed103 AC |
3076 | cdev_init(&vc0_cdev, console_fops); |
3077 | if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || | |
3078 | register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) | |
3079 | panic("Couldn't register /dev/tty0 driver\n"); | |
1083a7be TI |
3080 | tty0dev = device_create_with_groups(tty_class, NULL, |
3081 | MKDEV(TTY_MAJOR, 0), NULL, | |
3082 | vt_dev_groups, "tty0"); | |
fbc92a34 KS |
3083 | if (IS_ERR(tty0dev)) |
3084 | tty0dev = NULL; | |
d81ed103 | 3085 | |
1da177e4 LT |
3086 | vcs_init(); |
3087 | ||
3088 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
3089 | if (!console_driver) | |
3090 | panic("Couldn't allocate console driver\n"); | |
2f16669d | 3091 | |
1da177e4 LT |
3092 | console_driver->name = "tty"; |
3093 | console_driver->name_base = 1; | |
3094 | console_driver->major = TTY_MAJOR; | |
3095 | console_driver->minor_start = 1; | |
3096 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
3097 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
3098 | if (default_utf8) |
3099 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
3100 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
3101 | tty_set_operations(console_driver, &con_ops); | |
3102 | if (tty_register_driver(console_driver)) | |
3103 | panic("Couldn't register console driver\n"); | |
1da177e4 LT |
3104 | kbd_init(); |
3105 | console_map_init(); | |
1da177e4 LT |
3106 | #ifdef CONFIG_MDA_CONSOLE |
3107 | mda_console_init(); | |
3108 | #endif | |
3109 | return 0; | |
3110 | } | |
3111 | ||
3112 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
3113 | |
3114 | static struct class *vtconsole_class; | |
3115 | ||
50e244cc | 3116 | static int do_bind_con_driver(const struct consw *csw, int first, int last, |
b7269dd2 | 3117 | int deflt) |
1da177e4 | 3118 | { |
3e795de7 AD |
3119 | struct module *owner = csw->owner; |
3120 | const char *desc = NULL; | |
3121 | struct con_driver *con_driver; | |
3122 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 3123 | |
1da177e4 LT |
3124 | if (!try_module_get(owner)) |
3125 | return -ENODEV; | |
3126 | ||
50e244cc | 3127 | WARN_CONSOLE_UNLOCKED(); |
1c8ce271 | 3128 | |
3e795de7 AD |
3129 | /* check if driver is registered */ |
3130 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3131 | con_driver = ®istered_con_driver[i]; | |
3132 | ||
3133 | if (con_driver->con == csw) { | |
3134 | desc = con_driver->desc; | |
3135 | retval = 0; | |
3136 | break; | |
3137 | } | |
3138 | } | |
3139 | ||
3140 | if (retval) | |
3141 | goto err; | |
3142 | ||
3143 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3144 | csw->con_startup(); | |
3145 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3146 | } |
1c8ce271 | 3147 | |
1da177e4 LT |
3148 | if (deflt) { |
3149 | if (conswitchp) | |
3150 | module_put(conswitchp->owner); | |
1c8ce271 | 3151 | |
1da177e4 LT |
3152 | __module_get(owner); |
3153 | conswitchp = csw; | |
3154 | } | |
3155 | ||
3e795de7 AD |
3156 | first = max(first, con_driver->first); |
3157 | last = min(last, con_driver->last); | |
3158 | ||
1da177e4 LT |
3159 | for (i = first; i <= last; i++) { |
3160 | int old_was_color; | |
3161 | struct vc_data *vc = vc_cons[i].d; | |
3162 | ||
3163 | if (con_driver_map[i]) | |
3164 | module_put(con_driver_map[i]->owner); | |
3165 | __module_get(owner); | |
3166 | con_driver_map[i] = csw; | |
3167 | ||
3168 | if (!vc || !vc->vc_sw) | |
3169 | continue; | |
3170 | ||
3171 | j = i; | |
1c8ce271 | 3172 | |
6ca8dfd7 | 3173 | if (con_is_visible(vc)) { |
4ee1acce | 3174 | k = i; |
1da177e4 | 3175 | save_screen(vc); |
4ee1acce DH |
3176 | } |
3177 | ||
1da177e4 LT |
3178 | old_was_color = vc->vc_can_do_color; |
3179 | vc->vc_sw->con_deinit(vc); | |
9fc2b2d0 | 3180 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
1da177e4 | 3181 | visual_init(vc, i, 0); |
1c8ce271 | 3182 | set_origin(vc); |
1da177e4 LT |
3183 | update_attr(vc); |
3184 | ||
3185 | /* If the console changed between mono <-> color, then | |
3186 | * the attributes in the screenbuf will be wrong. The | |
3187 | * following resets all attributes to something sane. | |
3188 | */ | |
3189 | if (old_was_color != vc->vc_can_do_color) | |
3190 | clear_buffer_attributes(vc); | |
1da177e4 | 3191 | } |
4ee1acce | 3192 | |
1ffdda95 | 3193 | pr_info("Console: switching "); |
1da177e4 | 3194 | if (!deflt) |
4bcc595c | 3195 | printk(KERN_CONT "consoles %d-%d ", first+1, last+1); |
4ee1acce DH |
3196 | if (j >= 0) { |
3197 | struct vc_data *vc = vc_cons[j].d; | |
3198 | ||
4bcc595c | 3199 | printk(KERN_CONT "to %s %s %dx%d\n", |
4ee1acce DH |
3200 | vc->vc_can_do_color ? "colour" : "mono", |
3201 | desc, vc->vc_cols, vc->vc_rows); | |
3202 | ||
3203 | if (k >= 0) { | |
3204 | vc = vc_cons[k].d; | |
3205 | update_screen(vc); | |
3206 | } | |
3207 | } else | |
4bcc595c | 3208 | printk(KERN_CONT "to %s\n", desc); |
1da177e4 | 3209 | |
3e795de7 AD |
3210 | retval = 0; |
3211 | err: | |
1da177e4 | 3212 | module_put(owner); |
3e795de7 AD |
3213 | return retval; |
3214 | }; | |
1da177e4 | 3215 | |
50e244cc | 3216 | |
13ae6645 | 3217 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
e93a9a86 TI |
3218 | /* unlocked version of unbind_con_driver() */ |
3219 | int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) | |
1da177e4 | 3220 | { |
3e795de7 AD |
3221 | struct module *owner = csw->owner; |
3222 | const struct consw *defcsw = NULL; | |
3223 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3224 | int i, retval = -ENODEV; | |
1da177e4 | 3225 | |
3e795de7 AD |
3226 | if (!try_module_get(owner)) |
3227 | return -ENODEV; | |
3228 | ||
e93a9a86 | 3229 | WARN_CONSOLE_UNLOCKED(); |
3e795de7 AD |
3230 | |
3231 | /* check if driver is registered and if it is unbindable */ | |
3232 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3233 | con_driver = ®istered_con_driver[i]; | |
3234 | ||
3235 | if (con_driver->con == csw && | |
6db4063c | 3236 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3237 | retval = 0; |
3238 | break; | |
3239 | } | |
3240 | } | |
3241 | ||
e93a9a86 | 3242 | if (retval) |
3e795de7 | 3243 | goto err; |
3e795de7 | 3244 | |
6db4063c AD |
3245 | retval = -ENODEV; |
3246 | ||
3e795de7 AD |
3247 | /* check if backup driver exists */ |
3248 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3249 | con_back = ®istered_con_driver[i]; | |
3250 | ||
249f7b3e | 3251 | if (con_back->con && con_back->con != csw) { |
3e795de7 AD |
3252 | defcsw = con_back->con; |
3253 | retval = 0; | |
3254 | break; | |
3255 | } | |
3256 | } | |
3257 | ||
e93a9a86 | 3258 | if (retval) |
3e795de7 | 3259 | goto err; |
3e795de7 | 3260 | |
e93a9a86 | 3261 | if (!con_is_bound(csw)) |
3e795de7 | 3262 | goto err; |
3e795de7 AD |
3263 | |
3264 | first = max(first, con_driver->first); | |
3265 | last = min(last, con_driver->last); | |
3266 | ||
3267 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3268 | if (con_driver_map[i] == csw) { |
3269 | module_put(csw->owner); | |
3270 | con_driver_map[i] = NULL; | |
3271 | } | |
3e795de7 AD |
3272 | } |
3273 | ||
3274 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3275 | const struct consw *defconsw = conswitchp; |
3276 | ||
3e795de7 AD |
3277 | defcsw->con_startup(); |
3278 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3279 | /* |
3280 | * vgacon may change the default driver to point | |
3281 | * to dummycon, we restore it here... | |
3282 | */ | |
3283 | conswitchp = defconsw; | |
3e795de7 AD |
3284 | } |
3285 | ||
3286 | if (!con_is_bound(csw)) | |
3287 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3288 | ||
6db4063c | 3289 | /* ignore return value, binding should not fail */ |
50e244cc | 3290 | do_bind_con_driver(defcsw, first, last, deflt); |
3e795de7 AD |
3291 | err: |
3292 | module_put(owner); | |
3293 | return retval; | |
3294 | ||
3295 | } | |
e93a9a86 | 3296 | EXPORT_SYMBOL_GPL(do_unbind_con_driver); |
3e795de7 | 3297 | |
6db4063c AD |
3298 | static int vt_bind(struct con_driver *con) |
3299 | { | |
3300 | const struct consw *defcsw = NULL, *csw = NULL; | |
3301 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3302 | ||
77232f79 | 3303 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3304 | goto err; |
3305 | ||
3306 | csw = con->con; | |
3307 | ||
3308 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3309 | struct con_driver *con = ®istered_con_driver[i]; | |
3310 | ||
3311 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3312 | defcsw = con->con; | |
3313 | break; | |
3314 | } | |
3315 | } | |
3316 | ||
3317 | if (!defcsw) | |
3318 | goto err; | |
3319 | ||
3320 | while (more) { | |
3321 | more = 0; | |
3322 | ||
3323 | for (i = con->first; i <= con->last; i++) { | |
3324 | if (con_driver_map[i] == defcsw) { | |
3325 | if (first == -1) | |
3326 | first = i; | |
3327 | last = i; | |
3328 | more = 1; | |
3329 | } else if (first != -1) | |
3330 | break; | |
3331 | } | |
3332 | ||
3333 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3334 | deflt = 1; | |
3335 | ||
4c215fe8 | 3336 | if (first != -1) |
c62a1e57 | 3337 | do_bind_con_driver(csw, first, last, deflt); |
6db4063c AD |
3338 | |
3339 | first = -1; | |
3340 | last = -1; | |
3341 | deflt = 0; | |
3342 | } | |
3343 | ||
3344 | err: | |
3345 | return 0; | |
3346 | } | |
3347 | ||
3348 | static int vt_unbind(struct con_driver *con) | |
3349 | { | |
3350 | const struct consw *csw = NULL; | |
3351 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
f418f2ec | 3352 | int ret; |
6db4063c | 3353 | |
77232f79 | 3354 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3355 | goto err; |
3356 | ||
3357 | csw = con->con; | |
3358 | ||
3359 | while (more) { | |
3360 | more = 0; | |
3361 | ||
3362 | for (i = con->first; i <= con->last; i++) { | |
3363 | if (con_driver_map[i] == csw) { | |
3364 | if (first == -1) | |
3365 | first = i; | |
3366 | last = i; | |
3367 | more = 1; | |
3368 | } else if (first != -1) | |
3369 | break; | |
3370 | } | |
3371 | ||
3372 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3373 | deflt = 1; | |
3374 | ||
618f2b90 | 3375 | if (first != -1) { |
f418f2ec | 3376 | ret = do_unbind_con_driver(csw, first, last, deflt); |
f418f2ec DV |
3377 | if (ret != 0) |
3378 | return ret; | |
618f2b90 | 3379 | } |
6db4063c AD |
3380 | |
3381 | first = -1; | |
3382 | last = -1; | |
3383 | deflt = 0; | |
3384 | } | |
3385 | ||
3386 | err: | |
3387 | return 0; | |
3388 | } | |
13ae6645 AD |
3389 | #else |
3390 | static inline int vt_bind(struct con_driver *con) | |
3391 | { | |
3392 | return 0; | |
3393 | } | |
3394 | static inline int vt_unbind(struct con_driver *con) | |
3395 | { | |
3396 | return 0; | |
3397 | } | |
3398 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3399 | |
805952a8 | 3400 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3401 | const char *buf, size_t count) |
3402 | { | |
805952a8 | 3403 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3404 | int bind = simple_strtoul(buf, NULL, 0); |
3405 | ||
4c215fe8 ID |
3406 | console_lock(); |
3407 | ||
6db4063c AD |
3408 | if (bind) |
3409 | vt_bind(con); | |
3410 | else | |
3411 | vt_unbind(con); | |
3412 | ||
4c215fe8 ID |
3413 | console_unlock(); |
3414 | ||
6db4063c AD |
3415 | return count; |
3416 | } | |
3417 | ||
805952a8 GKH |
3418 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3419 | char *buf) | |
6db4063c | 3420 | { |
805952a8 | 3421 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3422 | int bind = con_is_bound(con->con); |
3423 | ||
3424 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3425 | } | |
3426 | ||
805952a8 GKH |
3427 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3428 | char *buf) | |
6db4063c | 3429 | { |
805952a8 | 3430 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3431 | |
3432 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3433 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3434 | con->desc); | |
3435 | ||
3436 | } | |
3437 | ||
1083a7be TI |
3438 | static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind); |
3439 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
3440 | ||
3441 | static struct attribute *con_dev_attrs[] = { | |
3442 | &dev_attr_bind.attr, | |
3443 | &dev_attr_name.attr, | |
3444 | NULL | |
6db4063c AD |
3445 | }; |
3446 | ||
1083a7be TI |
3447 | ATTRIBUTE_GROUPS(con_dev); |
3448 | ||
805952a8 | 3449 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c | 3450 | { |
928e964f | 3451 | con->flag |= CON_DRIVER_FLAG_ATTR; |
1083a7be | 3452 | return 0; |
6db4063c AD |
3453 | } |
3454 | ||
805952a8 | 3455 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c | 3456 | { |
1083a7be | 3457 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
6db4063c AD |
3458 | } |
3459 | ||
3e795de7 AD |
3460 | /** |
3461 | * con_is_bound - checks if driver is bound to the console | |
3462 | * @csw: console driver | |
3463 | * | |
3464 | * RETURNS: zero if unbound, nonzero if bound | |
3465 | * | |
3466 | * Drivers can call this and if zero, they should release | |
3467 | * all resources allocated on con_startup() | |
3468 | */ | |
3469 | int con_is_bound(const struct consw *csw) | |
3470 | { | |
3471 | int i, bound = 0; | |
3472 | ||
3473 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3474 | if (con_driver_map[i] == csw) { | |
3475 | bound = 1; | |
3476 | break; | |
3477 | } | |
3478 | } | |
3479 | ||
3480 | return bound; | |
3481 | } | |
3482 | EXPORT_SYMBOL(con_is_bound); | |
3483 | ||
b45cfba4 JB |
3484 | /** |
3485 | * con_debug_enter - prepare the console for the kernel debugger | |
3486 | * @sw: console driver | |
3487 | * | |
3488 | * Called when the console is taken over by the kernel debugger, this | |
3489 | * function needs to save the current console state, then put the console | |
3490 | * into a state suitable for the kernel debugger. | |
3491 | * | |
3492 | * RETURNS: | |
3493 | * Zero on success, nonzero if a failure occurred when trying to prepare | |
3494 | * the console for the debugger. | |
3495 | */ | |
3496 | int con_debug_enter(struct vc_data *vc) | |
3497 | { | |
3498 | int ret = 0; | |
3499 | ||
3500 | saved_fg_console = fg_console; | |
3501 | saved_last_console = last_console; | |
3502 | saved_want_console = want_console; | |
3503 | saved_vc_mode = vc->vc_mode; | |
beed5336 | 3504 | saved_console_blanked = console_blanked; |
b45cfba4 JB |
3505 | vc->vc_mode = KD_TEXT; |
3506 | console_blanked = 0; | |
3507 | if (vc->vc_sw->con_debug_enter) | |
3508 | ret = vc->vc_sw->con_debug_enter(vc); | |
81d44507 JW |
3509 | #ifdef CONFIG_KGDB_KDB |
3510 | /* Set the initial LINES variable if it is not already set */ | |
3511 | if (vc->vc_rows < 999) { | |
3512 | int linecount; | |
3513 | char lns[4]; | |
3514 | const char *setargs[3] = { | |
3515 | "set", | |
3516 | "LINES", | |
3517 | lns, | |
3518 | }; | |
3519 | if (kdbgetintenv(setargs[0], &linecount)) { | |
3520 | snprintf(lns, 4, "%i", vc->vc_rows); | |
3521 | kdb_set(2, setargs); | |
3522 | } | |
3523 | } | |
17b572e8 JW |
3524 | if (vc->vc_cols < 999) { |
3525 | int colcount; | |
3526 | char cols[4]; | |
3527 | const char *setargs[3] = { | |
3528 | "set", | |
3529 | "COLUMNS", | |
3530 | cols, | |
3531 | }; | |
3532 | if (kdbgetintenv(setargs[0], &colcount)) { | |
3533 | snprintf(cols, 4, "%i", vc->vc_cols); | |
3534 | kdb_set(2, setargs); | |
3535 | } | |
3536 | } | |
81d44507 | 3537 | #endif /* CONFIG_KGDB_KDB */ |
b45cfba4 JB |
3538 | return ret; |
3539 | } | |
3540 | EXPORT_SYMBOL_GPL(con_debug_enter); | |
3541 | ||
3542 | /** | |
3543 | * con_debug_leave - restore console state | |
3544 | * @sw: console driver | |
3545 | * | |
3546 | * Restore the console state to what it was before the kernel debugger | |
3547 | * was invoked. | |
3548 | * | |
3549 | * RETURNS: | |
3550 | * Zero on success, nonzero if a failure occurred when trying to restore | |
3551 | * the console. | |
3552 | */ | |
3553 | int con_debug_leave(void) | |
3554 | { | |
3555 | struct vc_data *vc; | |
3556 | int ret = 0; | |
3557 | ||
3558 | fg_console = saved_fg_console; | |
3559 | last_console = saved_last_console; | |
3560 | want_console = saved_want_console; | |
beed5336 | 3561 | console_blanked = saved_console_blanked; |
b45cfba4 JB |
3562 | vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
3563 | ||
3564 | vc = vc_cons[fg_console].d; | |
3565 | if (vc->vc_sw->con_debug_leave) | |
3566 | ret = vc->vc_sw->con_debug_leave(vc); | |
3567 | return ret; | |
3568 | } | |
3569 | EXPORT_SYMBOL_GPL(con_debug_leave); | |
3570 | ||
50e244cc | 3571 | static int do_register_con_driver(const struct consw *csw, int first, int last) |
3e795de7 AD |
3572 | { |
3573 | struct module *owner = csw->owner; | |
3574 | struct con_driver *con_driver; | |
3575 | const char *desc; | |
96317e9e | 3576 | int i, retval; |
3e795de7 | 3577 | |
50e244cc AC |
3578 | WARN_CONSOLE_UNLOCKED(); |
3579 | ||
3e795de7 AD |
3580 | if (!try_module_get(owner)) |
3581 | return -ENODEV; | |
3582 | ||
3e795de7 AD |
3583 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3584 | con_driver = ®istered_con_driver[i]; | |
3585 | ||
3586 | /* already registered */ | |
96317e9e | 3587 | if (con_driver->con == csw) { |
c55c63c6 | 3588 | retval = -EBUSY; |
96317e9e JS |
3589 | goto err; |
3590 | } | |
3e795de7 AD |
3591 | } |
3592 | ||
3e795de7 | 3593 | desc = csw->con_startup(); |
6798df4c JS |
3594 | if (!desc) { |
3595 | retval = -ENODEV; | |
3e795de7 | 3596 | goto err; |
6798df4c | 3597 | } |
3e795de7 AD |
3598 | |
3599 | retval = -EINVAL; | |
3600 | ||
3601 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3602 | con_driver = ®istered_con_driver[i]; | |
3603 | ||
d364b5c3 ID |
3604 | if (con_driver->con == NULL && |
3605 | !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) { | |
3e795de7 AD |
3606 | con_driver->con = csw; |
3607 | con_driver->desc = desc; | |
6db4063c AD |
3608 | con_driver->node = i; |
3609 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
3610 | CON_DRIVER_FLAG_INIT; |
3611 | con_driver->first = first; | |
3612 | con_driver->last = last; | |
3613 | retval = 0; | |
3614 | break; | |
3615 | } | |
3616 | } | |
3617 | ||
6db4063c AD |
3618 | if (retval) |
3619 | goto err; | |
3620 | ||
1083a7be TI |
3621 | con_driver->dev = |
3622 | device_create_with_groups(vtconsole_class, NULL, | |
3623 | MKDEV(0, con_driver->node), | |
3624 | con_driver, con_dev_groups, | |
3625 | "vtcon%i", con_driver->node); | |
805952a8 GKH |
3626 | if (IS_ERR(con_driver->dev)) { |
3627 | printk(KERN_WARNING "Unable to create device for %s; " | |
6db4063c | 3628 | "errno = %ld\n", con_driver->desc, |
805952a8 GKH |
3629 | PTR_ERR(con_driver->dev)); |
3630 | con_driver->dev = NULL; | |
6db4063c | 3631 | } else { |
805952a8 | 3632 | vtconsole_init_device(con_driver); |
6db4063c | 3633 | } |
928e964f | 3634 | |
3e795de7 | 3635 | err: |
3e795de7 AD |
3636 | module_put(owner); |
3637 | return retval; | |
3638 | } | |
50e244cc | 3639 | |
3e795de7 AD |
3640 | |
3641 | /** | |
50539dd4 | 3642 | * do_unregister_con_driver - unregister console driver from console layer |
3e795de7 AD |
3643 | * @csw: console driver |
3644 | * | |
3645 | * DESCRIPTION: All drivers that registers to the console layer must | |
3646 | * call this function upon exit, or if the console driver is in a state | |
3647 | * where it won't be able to handle console services, such as the | |
3648 | * framebuffer console without loaded framebuffer drivers. | |
3649 | * | |
3650 | * The driver must unbind first prior to unregistration. | |
3651 | */ | |
e93a9a86 TI |
3652 | int do_unregister_con_driver(const struct consw *csw) |
3653 | { | |
d9c660e7 | 3654 | int i; |
3e795de7 AD |
3655 | |
3656 | /* cannot unregister a bound driver */ | |
3657 | if (con_is_bound(csw)) | |
d9c660e7 DV |
3658 | return -EBUSY; |
3659 | ||
3660 | if (csw == conswitchp) | |
3661 | return -EINVAL; | |
3e795de7 AD |
3662 | |
3663 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3664 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3665 | ||
2cf30f75 | 3666 | if (con_driver->con == csw) { |
d364b5c3 ID |
3667 | /* |
3668 | * Defer the removal of the sysfs entries since that | |
3669 | * will acquire the kernfs s_active lock and we can't | |
3670 | * acquire this lock while holding the console lock: | |
3671 | * the unbind sysfs entry imposes already the opposite | |
3672 | * order. Reset con already here to prevent any later | |
3673 | * lookup to succeed and mark this slot as zombie, so | |
3674 | * it won't get reused until we complete the removal | |
3675 | * in the deferred work. | |
3676 | */ | |
3e795de7 | 3677 | con_driver->con = NULL; |
d364b5c3 ID |
3678 | con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; |
3679 | schedule_work(&con_driver_unregister_work); | |
3680 | ||
d9c660e7 | 3681 | return 0; |
3e795de7 AD |
3682 | } |
3683 | } | |
d9c660e7 DV |
3684 | |
3685 | return -ENODEV; | |
3e795de7 | 3686 | } |
e93a9a86 | 3687 | EXPORT_SYMBOL_GPL(do_unregister_con_driver); |
3e795de7 | 3688 | |
d364b5c3 ID |
3689 | static void con_driver_unregister_callback(struct work_struct *ignored) |
3690 | { | |
3691 | int i; | |
3692 | ||
3693 | console_lock(); | |
3694 | ||
3695 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3696 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3697 | ||
3698 | if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) | |
3699 | continue; | |
3700 | ||
3701 | console_unlock(); | |
3702 | ||
3703 | vtconsole_deinit_device(con_driver); | |
3704 | device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); | |
3705 | ||
3706 | console_lock(); | |
3707 | ||
3708 | if (WARN_ON_ONCE(con_driver->con)) | |
3709 | con_driver->con = NULL; | |
3710 | con_driver->desc = NULL; | |
3711 | con_driver->dev = NULL; | |
3712 | con_driver->node = 0; | |
3713 | WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); | |
3714 | con_driver->flag = 0; | |
3715 | con_driver->first = 0; | |
3716 | con_driver->last = 0; | |
3717 | } | |
3718 | ||
3719 | console_unlock(); | |
3720 | } | |
3721 | ||
3e795de7 AD |
3722 | /* |
3723 | * If we support more console drivers, this function is used | |
3724 | * when a driver wants to take over some existing consoles | |
3725 | * and become default driver for newly opened ones. | |
3726 | * | |
155957f5 | 3727 | * do_take_over_console is basically a register followed by unbind |
50e244cc AC |
3728 | */ |
3729 | int do_take_over_console(const struct consw *csw, int first, int last, int deflt) | |
3730 | { | |
3731 | int err; | |
3732 | ||
3733 | err = do_register_con_driver(csw, first, last); | |
3734 | /* | |
3735 | * If we get an busy error we still want to bind the console driver | |
3736 | * and return success, as we may have unbound the console driver | |
3737 | * but not unregistered it. | |
3738 | */ | |
3739 | if (err == -EBUSY) | |
3740 | err = 0; | |
3741 | if (!err) | |
3742 | do_bind_con_driver(csw, first, last, deflt); | |
3743 | ||
3744 | return err; | |
3745 | } | |
3746 | EXPORT_SYMBOL_GPL(do_take_over_console); | |
3747 | ||
3e795de7 AD |
3748 | |
3749 | /* | |
3750 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
3751 | * work if driver is fully unbound. | |
3752 | */ | |
3753 | void give_up_console(const struct consw *csw) | |
3754 | { | |
70125e76 WY |
3755 | console_lock(); |
3756 | do_unregister_con_driver(csw); | |
3757 | console_unlock(); | |
3e795de7 AD |
3758 | } |
3759 | ||
6db4063c | 3760 | static int __init vtconsole_class_init(void) |
3e795de7 | 3761 | { |
6db4063c | 3762 | int i; |
3e795de7 | 3763 | |
6db4063c AD |
3764 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
3765 | if (IS_ERR(vtconsole_class)) { | |
3766 | printk(KERN_WARNING "Unable to create vt console class; " | |
3767 | "errno = %ld\n", PTR_ERR(vtconsole_class)); | |
3768 | vtconsole_class = NULL; | |
3769 | } | |
3e795de7 | 3770 | |
6db4063c | 3771 | /* Add system drivers to sysfs */ |
3e795de7 AD |
3772 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3773 | struct con_driver *con = ®istered_con_driver[i]; | |
3774 | ||
805952a8 | 3775 | if (con->con && !con->dev) { |
1083a7be TI |
3776 | con->dev = |
3777 | device_create_with_groups(vtconsole_class, NULL, | |
3778 | MKDEV(0, con->node), | |
3779 | con, con_dev_groups, | |
3780 | "vtcon%i", con->node); | |
6db4063c | 3781 | |
805952a8 | 3782 | if (IS_ERR(con->dev)) { |
6db4063c | 3783 | printk(KERN_WARNING "Unable to create " |
805952a8 GKH |
3784 | "device for %s; errno = %ld\n", |
3785 | con->desc, PTR_ERR(con->dev)); | |
3786 | con->dev = NULL; | |
6db4063c | 3787 | } else { |
805952a8 | 3788 | vtconsole_init_device(con); |
6db4063c | 3789 | } |
3e795de7 | 3790 | } |
3e795de7 AD |
3791 | } |
3792 | ||
3e795de7 AD |
3793 | return 0; |
3794 | } | |
6db4063c | 3795 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 3796 | |
1da177e4 LT |
3797 | #endif |
3798 | ||
3799 | /* | |
3800 | * Screen blanking | |
3801 | */ | |
3802 | ||
403aac96 | 3803 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 3804 | { |
403aac96 YY |
3805 | unsigned int mode; |
3806 | ||
3807 | if (get_user(mode, p + 1)) | |
3808 | return -EFAULT; | |
3809 | ||
3810 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
3811 | return 0; | |
1da177e4 LT |
3812 | } |
3813 | ||
1da177e4 LT |
3814 | void do_blank_screen(int entering_gfx) |
3815 | { | |
3816 | struct vc_data *vc = vc_cons[fg_console].d; | |
3817 | int i; | |
3818 | ||
3819 | WARN_CONSOLE_UNLOCKED(); | |
3820 | ||
3821 | if (console_blanked) { | |
3822 | if (blank_state == blank_vesa_wait) { | |
3823 | blank_state = blank_off; | |
d060a321 | 3824 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
3825 | } |
3826 | return; | |
3827 | } | |
1da177e4 LT |
3828 | |
3829 | /* entering graphics mode? */ | |
3830 | if (entering_gfx) { | |
3831 | hide_cursor(vc); | |
3832 | save_screen(vc); | |
3833 | vc->vc_sw->con_blank(vc, -1, 1); | |
3834 | console_blanked = fg_console + 1; | |
b6e8f00f | 3835 | blank_state = blank_off; |
1da177e4 LT |
3836 | set_origin(vc); |
3837 | return; | |
3838 | } | |
3839 | ||
b6e8f00f | 3840 | if (blank_state != blank_normal_wait) |
3841 | return; | |
3842 | blank_state = blank_off; | |
3843 | ||
1da177e4 LT |
3844 | /* don't blank graphics */ |
3845 | if (vc->vc_mode != KD_TEXT) { | |
3846 | console_blanked = fg_console + 1; | |
3847 | return; | |
3848 | } | |
3849 | ||
3850 | hide_cursor(vc); | |
3851 | del_timer_sync(&console_timer); | |
3852 | blank_timer_expired = 0; | |
3853 | ||
3854 | save_screen(vc); | |
3855 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 3856 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
3857 | console_blanked = fg_console + 1; |
3858 | if (i) | |
3859 | set_origin(vc); | |
3860 | ||
3861 | if (console_blank_hook && console_blank_hook(1)) | |
3862 | return; | |
3863 | ||
d060a321 | 3864 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 3865 | blank_state = blank_vesa_wait; |
1da177e4 LT |
3866 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
3867 | } | |
8b92e87d | 3868 | vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3869 | } |
3870 | EXPORT_SYMBOL(do_blank_screen); | |
3871 | ||
3872 | /* | |
3873 | * Called by timer as well as from vt_console_driver | |
3874 | */ | |
3875 | void do_unblank_screen(int leaving_gfx) | |
3876 | { | |
3877 | struct vc_data *vc; | |
3878 | ||
3879 | /* This should now always be called from a "sane" (read: can schedule) | |
3880 | * context for the sake of the low level drivers, except in the special | |
3881 | * case of oops_in_progress | |
3882 | */ | |
3883 | if (!oops_in_progress) | |
3884 | might_sleep(); | |
3885 | ||
3886 | WARN_CONSOLE_UNLOCKED(); | |
3887 | ||
3888 | ignore_poke = 0; | |
3889 | if (!console_blanked) | |
3890 | return; | |
3891 | if (!vc_cons_allocated(fg_console)) { | |
3892 | /* impossible */ | |
e620e548 JP |
3893 | pr_warn("unblank_screen: tty %d not allocated ??\n", |
3894 | fg_console + 1); | |
1da177e4 LT |
3895 | return; |
3896 | } | |
3897 | vc = vc_cons[fg_console].d; | |
8fd4bd22 JB |
3898 | /* Try to unblank in oops case too */ |
3899 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) | |
1da177e4 LT |
3900 | return; /* but leave console_blanked != 0 */ |
3901 | ||
3902 | if (blankinterval) { | |
f324edc8 | 3903 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3904 | blank_state = blank_normal_wait; |
3905 | } | |
3906 | ||
3907 | console_blanked = 0; | |
8fd4bd22 | 3908 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) |
1da177e4 LT |
3909 | /* Low-level driver cannot restore -> do it ourselves */ |
3910 | update_screen(vc); | |
3911 | if (console_blank_hook) | |
3912 | console_blank_hook(0); | |
3913 | set_palette(vc); | |
3914 | set_cursor(vc); | |
8b92e87d | 3915 | vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3916 | } |
3917 | EXPORT_SYMBOL(do_unblank_screen); | |
3918 | ||
3919 | /* | |
3920 | * This is called by the outside world to cause a forced unblank, mostly for | |
3921 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
3922 | * call it with 1 as an argument and so force a mode restore... that may kill | |
3923 | * X or at least garbage the screen but would also make the Oops visible... | |
3924 | */ | |
3925 | void unblank_screen(void) | |
3926 | { | |
3927 | do_unblank_screen(0); | |
3928 | } | |
3929 | ||
3930 | /* | |
70522e12 | 3931 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 3932 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 3933 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 LT |
3934 | */ |
3935 | static void blank_screen_t(unsigned long dummy) | |
3936 | { | |
cc63b1e1 | 3937 | if (unlikely(!keventd_up())) { |
f324edc8 | 3938 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
cc63b1e1 JB |
3939 | return; |
3940 | } | |
1da177e4 LT |
3941 | blank_timer_expired = 1; |
3942 | schedule_work(&console_work); | |
3943 | } | |
3944 | ||
3945 | void poke_blanked_console(void) | |
3946 | { | |
3947 | WARN_CONSOLE_UNLOCKED(); | |
3948 | ||
3949 | /* Add this so we quickly catch whoever might call us in a non | |
3950 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
3951 | * atomic contexts and is allowed to schedule (with the special case | |
3952 | * of oops_in_progress, but that isn't of any concern for this | |
3953 | * function. --BenH. | |
3954 | */ | |
3955 | might_sleep(); | |
3956 | ||
3957 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
3958 | * at worse, we'll do a spurrious blank and it's unlikely | |
3959 | */ | |
3960 | del_timer(&console_timer); | |
3961 | blank_timer_expired = 0; | |
3962 | ||
3963 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
3964 | return; | |
3965 | if (console_blanked) | |
3966 | unblank_screen(); | |
3967 | else if (blankinterval) { | |
f324edc8 | 3968 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3969 | blank_state = blank_normal_wait; |
3970 | } | |
3971 | } | |
3972 | ||
3973 | /* | |
3974 | * Palettes | |
3975 | */ | |
3976 | ||
3977 | static void set_palette(struct vc_data *vc) | |
3978 | { | |
3979 | WARN_CONSOLE_UNLOCKED(); | |
3980 | ||
709280da | 3981 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette) |
1da177e4 LT |
3982 | vc->vc_sw->con_set_palette(vc, color_table); |
3983 | } | |
3984 | ||
1da177e4 LT |
3985 | /* |
3986 | * Load palette into the DAC registers. arg points to a colour | |
3987 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
3988 | */ | |
3989 | ||
3990 | int con_set_cmap(unsigned char __user *arg) | |
3991 | { | |
871bdea6 MG |
3992 | int i, j, k; |
3993 | unsigned char colormap[3*16]; | |
3994 | ||
3995 | if (copy_from_user(colormap, arg, sizeof(colormap))) | |
3996 | return -EFAULT; | |
1da177e4 | 3997 | |
ac751efa | 3998 | console_lock(); |
871bdea6 MG |
3999 | for (i = k = 0; i < 16; i++) { |
4000 | default_red[i] = colormap[k++]; | |
4001 | default_grn[i] = colormap[k++]; | |
4002 | default_blu[i] = colormap[k++]; | |
4003 | } | |
4004 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
4005 | if (!vc_cons_allocated(i)) | |
4006 | continue; | |
4007 | for (j = k = 0; j < 16; j++) { | |
4008 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
4009 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
4010 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
4011 | } | |
4012 | set_palette(vc_cons[i].d); | |
4013 | } | |
ac751efa | 4014 | console_unlock(); |
1da177e4 | 4015 | |
871bdea6 | 4016 | return 0; |
1da177e4 LT |
4017 | } |
4018 | ||
4019 | int con_get_cmap(unsigned char __user *arg) | |
4020 | { | |
871bdea6 MG |
4021 | int i, k; |
4022 | unsigned char colormap[3*16]; | |
1da177e4 | 4023 | |
ac751efa | 4024 | console_lock(); |
871bdea6 MG |
4025 | for (i = k = 0; i < 16; i++) { |
4026 | colormap[k++] = default_red[i]; | |
4027 | colormap[k++] = default_grn[i]; | |
4028 | colormap[k++] = default_blu[i]; | |
4029 | } | |
ac751efa | 4030 | console_unlock(); |
1da177e4 | 4031 | |
871bdea6 MG |
4032 | if (copy_to_user(arg, colormap, sizeof(colormap))) |
4033 | return -EFAULT; | |
4034 | ||
4035 | return 0; | |
1da177e4 LT |
4036 | } |
4037 | ||
4038 | void reset_palette(struct vc_data *vc) | |
4039 | { | |
4040 | int j, k; | |
4041 | for (j=k=0; j<16; j++) { | |
4042 | vc->vc_palette[k++] = default_red[j]; | |
4043 | vc->vc_palette[k++] = default_grn[j]; | |
4044 | vc->vc_palette[k++] = default_blu[j]; | |
4045 | } | |
4046 | set_palette(vc); | |
4047 | } | |
4048 | ||
4049 | /* | |
4050 | * Font switching | |
4051 | * | |
4052 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
4053 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
4054 | * depending on width) reserved for each character which is kinda wasty, but | |
4055 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
25985edc | 4056 | * is up to the actual low-level console-driver convert data into its favorite |
1da177e4 LT |
4057 | * format (maybe we should add a `fontoffset' field to the `display' |
4058 | * structure so we won't have to convert the fontdata all the time. | |
4059 | * /Jes | |
4060 | */ | |
4061 | ||
4062 | #define max_font_size 65536 | |
4063 | ||
4064 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
4065 | { | |
4066 | struct console_font font; | |
4067 | int rc = -EINVAL; | |
4068 | int c; | |
4069 | ||
1da177e4 LT |
4070 | if (op->data) { |
4071 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
4072 | if (!font.data) | |
4073 | return -ENOMEM; | |
4074 | } else | |
4075 | font.data = NULL; | |
4076 | ||
ac751efa | 4077 | console_lock(); |
edab558f AC |
4078 | if (vc->vc_mode != KD_TEXT) |
4079 | rc = -EINVAL; | |
4080 | else if (vc->vc_sw->con_font_get) | |
1da177e4 LT |
4081 | rc = vc->vc_sw->con_font_get(vc, &font); |
4082 | else | |
4083 | rc = -ENOSYS; | |
ac751efa | 4084 | console_unlock(); |
1da177e4 LT |
4085 | |
4086 | if (rc) | |
4087 | goto out; | |
4088 | ||
4089 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 4090 | |
1da177e4 LT |
4091 | if (op->data && font.charcount > op->charcount) |
4092 | rc = -ENOSPC; | |
4093 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
4094 | if (font.width > op->width || font.height > op->height) | |
4095 | rc = -ENOSPC; | |
4096 | } else { | |
4097 | if (font.width != 8) | |
4098 | rc = -EIO; | |
4099 | else if ((op->height && font.height > op->height) || | |
4100 | font.height > 32) | |
4101 | rc = -ENOSPC; | |
4102 | } | |
4103 | if (rc) | |
4104 | goto out; | |
4105 | ||
4106 | op->height = font.height; | |
4107 | op->width = font.width; | |
4108 | op->charcount = font.charcount; | |
4109 | ||
4110 | if (op->data && copy_to_user(op->data, font.data, c)) | |
4111 | rc = -EFAULT; | |
4112 | ||
4113 | out: | |
4114 | kfree(font.data); | |
4115 | return rc; | |
4116 | } | |
4117 | ||
4118 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
4119 | { | |
4120 | struct console_font font; | |
4121 | int rc = -EINVAL; | |
4122 | int size; | |
4123 | ||
4124 | if (vc->vc_mode != KD_TEXT) | |
4125 | return -EINVAL; | |
4126 | if (!op->data) | |
4127 | return -EINVAL; | |
4128 | if (op->charcount > 512) | |
4129 | return -EINVAL; | |
4130 | if (!op->height) { /* Need to guess font height [compat] */ | |
4131 | int h, i; | |
4132 | u8 __user *charmap = op->data; | |
4133 | u8 tmp; | |
4134 | ||
4135 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, | |
4136 | so that we can get rid of this soon */ | |
4137 | if (!(op->flags & KD_FONT_FLAG_OLD)) | |
4138 | return -EINVAL; | |
4139 | for (h = 32; h > 0; h--) | |
4140 | for (i = 0; i < op->charcount; i++) { | |
4141 | if (get_user(tmp, &charmap[32*i+h-1])) | |
4142 | return -EFAULT; | |
4143 | if (tmp) | |
4144 | goto nonzero; | |
4145 | } | |
4146 | return -EINVAL; | |
4147 | nonzero: | |
4148 | op->height = h; | |
4149 | } | |
4150 | if (op->width <= 0 || op->width > 32 || op->height > 32) | |
4151 | return -EINVAL; | |
4152 | size = (op->width+7)/8 * 32 * op->charcount; | |
4153 | if (size > max_font_size) | |
4154 | return -ENOSPC; | |
4155 | font.charcount = op->charcount; | |
4156 | font.height = op->height; | |
4157 | font.width = op->width; | |
9b71ca20 JL |
4158 | font.data = memdup_user(op->data, size); |
4159 | if (IS_ERR(font.data)) | |
4160 | return PTR_ERR(font.data); | |
ac751efa | 4161 | console_lock(); |
edab558f AC |
4162 | if (vc->vc_mode != KD_TEXT) |
4163 | rc = -EINVAL; | |
4164 | else if (vc->vc_sw->con_font_set) | |
1da177e4 LT |
4165 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
4166 | else | |
4167 | rc = -ENOSYS; | |
ac751efa | 4168 | console_unlock(); |
1da177e4 LT |
4169 | kfree(font.data); |
4170 | return rc; | |
4171 | } | |
4172 | ||
4173 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
4174 | { | |
4175 | struct console_font font = {.width = op->width, .height = op->height}; | |
4176 | char name[MAX_FONT_NAME]; | |
4177 | char *s = name; | |
4178 | int rc; | |
4179 | ||
1da177e4 LT |
4180 | |
4181 | if (!op->data) | |
4182 | s = NULL; | |
4183 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
4184 | return -EFAULT; | |
4185 | else | |
4186 | name[MAX_FONT_NAME - 1] = 0; | |
4187 | ||
ac751efa | 4188 | console_lock(); |
edab558f AC |
4189 | if (vc->vc_mode != KD_TEXT) { |
4190 | console_unlock(); | |
4191 | return -EINVAL; | |
4192 | } | |
1da177e4 LT |
4193 | if (vc->vc_sw->con_font_default) |
4194 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
4195 | else | |
4196 | rc = -ENOSYS; | |
ac751efa | 4197 | console_unlock(); |
1da177e4 LT |
4198 | if (!rc) { |
4199 | op->width = font.width; | |
4200 | op->height = font.height; | |
4201 | } | |
4202 | return rc; | |
4203 | } | |
4204 | ||
4205 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4206 | { | |
4207 | int con = op->height; | |
4208 | int rc; | |
4209 | ||
1da177e4 | 4210 | |
ac751efa | 4211 | console_lock(); |
edab558f AC |
4212 | if (vc->vc_mode != KD_TEXT) |
4213 | rc = -EINVAL; | |
4214 | else if (!vc->vc_sw->con_font_copy) | |
1da177e4 LT |
4215 | rc = -ENOSYS; |
4216 | else if (con < 0 || !vc_cons_allocated(con)) | |
4217 | rc = -ENOTTY; | |
4218 | else if (con == vc->vc_num) /* nothing to do */ | |
4219 | rc = 0; | |
4220 | else | |
4221 | rc = vc->vc_sw->con_font_copy(vc, con); | |
ac751efa | 4222 | console_unlock(); |
1da177e4 LT |
4223 | return rc; |
4224 | } | |
4225 | ||
4226 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4227 | { | |
4228 | switch (op->op) { | |
4229 | case KD_FONT_OP_SET: | |
4230 | return con_font_set(vc, op); | |
4231 | case KD_FONT_OP_GET: | |
4232 | return con_font_get(vc, op); | |
4233 | case KD_FONT_OP_SET_DEFAULT: | |
4234 | return con_font_default(vc, op); | |
4235 | case KD_FONT_OP_COPY: | |
4236 | return con_font_copy(vc, op); | |
4237 | } | |
4238 | return -ENOSYS; | |
4239 | } | |
4240 | ||
4241 | /* | |
4242 | * Interface exported to selection and vcs. | |
4243 | */ | |
4244 | ||
4245 | /* used by selection */ | |
4246 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4247 | { | |
4248 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4249 | u16 c = w & 0xff; | |
4250 | ||
4251 | if (w & vc->vc_hi_font_mask) | |
4252 | c |= 0x100; | |
4253 | return c; | |
4254 | } | |
f7511d5f | 4255 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 LT |
4256 | |
4257 | /* used by vcs - note the word offset */ | |
4258 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4259 | { | |
4260 | return screenpos(vc, 2 * w_offset, viewed); | |
4261 | } | |
88867e3d | 4262 | EXPORT_SYMBOL_GPL(screen_pos); |
1da177e4 LT |
4263 | |
4264 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4265 | { | |
4266 | p[0] = vc->vc_x; | |
4267 | p[1] = vc->vc_y; | |
4268 | } | |
4269 | ||
4270 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4271 | { | |
9477e260 | 4272 | hide_cursor(vc); |
1da177e4 LT |
4273 | gotoxy(vc, p[0], p[1]); |
4274 | set_cursor(vc); | |
4275 | } | |
4276 | ||
4277 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4278 | { | |
4279 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4280 | return softcursor_original; | |
4281 | return scr_readw(org); | |
4282 | } | |
4283 | ||
4284 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4285 | { | |
4286 | scr_writew(val, org); | |
4287 | if ((unsigned long)org == vc->vc_pos) { | |
4288 | softcursor_original = -1; | |
4289 | add_softcursor(vc); | |
4290 | } | |
4291 | } | |
4292 | ||
432c9ed2 NP |
4293 | void vcs_scr_updated(struct vc_data *vc) |
4294 | { | |
4295 | notify_update(vc); | |
4296 | } | |
4297 | ||
1da177e4 LT |
4298 | /* |
4299 | * Visible symbols for modules | |
4300 | */ | |
4301 | ||
4302 | EXPORT_SYMBOL(color_table); | |
4303 | EXPORT_SYMBOL(default_red); | |
4304 | EXPORT_SYMBOL(default_grn); | |
4305 | EXPORT_SYMBOL(default_blu); | |
4306 | EXPORT_SYMBOL(update_region); | |
4307 | EXPORT_SYMBOL(redraw_screen); | |
4308 | EXPORT_SYMBOL(vc_resize); | |
4309 | EXPORT_SYMBOL(fg_console); | |
4310 | EXPORT_SYMBOL(console_blank_hook); | |
4311 | EXPORT_SYMBOL(console_blanked); | |
4312 | EXPORT_SYMBOL(vc_cons); | |
f6c06b68 | 4313 | EXPORT_SYMBOL(global_cursor_default); |
1da177e4 | 4314 | #ifndef VT_SINGLE_DRIVER |
1da177e4 LT |
4315 | EXPORT_SYMBOL(give_up_console); |
4316 | #endif |