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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> | |
3f07c014 | 75 | #include <linux/sched/signal.h> |
1da177e4 LT |
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; |
a4199f5e | 184 | static int blankinterval; |
f324edc8 | 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 | ||
1d27e3e2 | 231 | static DEFINE_TIMER(console_timer, blank_screen_t); |
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 | ||
89765b94 JS |
318 | static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, |
319 | enum con_scroll dir, unsigned int nr) | |
1da177e4 | 320 | { |
89765b94 | 321 | u16 *clear, *d, *s; |
1da177e4 | 322 | |
89765b94 | 323 | if (t + nr >= b) |
1da177e4 LT |
324 | nr = b - t - 1; |
325 | if (b > vc->vc_rows || t >= b || nr < 1) | |
326 | return; | |
89765b94 | 327 | if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr)) |
1da177e4 | 328 | return; |
1da177e4 | 329 | |
89765b94 JS |
330 | s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t); |
331 | d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
1da177e4 | 332 | |
89765b94 JS |
333 | if (dir == SM_UP) { |
334 | clear = s + (b - t - nr) * vc->vc_cols; | |
335 | swap(s, d); | |
336 | } | |
337 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
338 | scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); | |
1da177e4 LT |
339 | } |
340 | ||
341 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
342 | { | |
1da177e4 LT |
343 | unsigned int xx, yy, offset; |
344 | u16 *p; | |
345 | ||
346 | p = (u16 *) start; | |
347 | if (!vc->vc_sw->con_getxy) { | |
348 | offset = (start - vc->vc_origin) / 2; | |
349 | xx = offset % vc->vc_cols; | |
350 | yy = offset / vc->vc_cols; | |
351 | } else { | |
352 | int nxx, nyy; | |
353 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
354 | xx = nxx; yy = nyy; | |
355 | } | |
356 | for(;;) { | |
357 | u16 attrib = scr_readw(p) & 0xff00; | |
358 | int startx = xx; | |
359 | u16 *q = p; | |
360 | while (xx < vc->vc_cols && count) { | |
361 | if (attrib != (scr_readw(p) & 0xff00)) { | |
362 | if (p > q) | |
363 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
364 | startx = xx; | |
365 | q = p; | |
366 | attrib = scr_readw(p) & 0xff00; | |
367 | } | |
368 | p++; | |
369 | xx++; | |
370 | count--; | |
371 | } | |
372 | if (p > q) | |
373 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
374 | if (!count) | |
375 | break; | |
376 | xx = 0; | |
377 | yy++; | |
378 | if (vc->vc_sw->con_getxy) { | |
379 | p = (u16 *)start; | |
380 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
381 | } | |
382 | } | |
1da177e4 LT |
383 | } |
384 | ||
385 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
386 | { | |
387 | WARN_CONSOLE_UNLOCKED(); | |
388 | ||
6ca8dfd7 | 389 | if (con_should_update(vc)) { |
1da177e4 LT |
390 | hide_cursor(vc); |
391 | do_update_region(vc, start, count); | |
392 | set_cursor(vc); | |
393 | } | |
394 | } | |
395 | ||
396 | /* Structure of attributes is hardware-dependent */ | |
397 | ||
fa6ce9ab JE |
398 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
399 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
400 | { |
401 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
402 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
403 | _blink, _underline, _reverse, _italic); | |
1da177e4 | 404 | |
1da177e4 LT |
405 | /* |
406 | * ++roman: I completely changed the attribute format for monochrome | |
407 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
408 | * adapter) format didn't allow the combination of certain effects. | |
409 | * Now the attribute is just a bit vector: | |
410 | * Bit 0..1: intensity (0..2) | |
411 | * Bit 2 : underline | |
412 | * Bit 3 : reverse | |
413 | * Bit 7 : blink | |
414 | */ | |
415 | { | |
c9e587ab | 416 | u8 a = _color; |
1da177e4 LT |
417 | if (!vc->vc_can_do_color) |
418 | return _intensity | | |
fa6ce9ab | 419 | (_italic ? 2 : 0) | |
1da177e4 LT |
420 | (_underline ? 4 : 0) | |
421 | (_reverse ? 8 : 0) | | |
422 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
423 | if (_italic) |
424 | a = (a & 0xF0) | vc->vc_itcolor; | |
425 | else if (_underline) | |
1da177e4 LT |
426 | a = (a & 0xf0) | vc->vc_ulcolor; |
427 | else if (_intensity == 0) | |
1c65a879 | 428 | a = (a & 0xf0) | vc->vc_halfcolor; |
1da177e4 LT |
429 | if (_reverse) |
430 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
431 | if (_blink) | |
432 | a ^= 0x80; | |
433 | if (_intensity == 2) | |
434 | a ^= 0x08; | |
435 | if (vc->vc_hi_font_mask == 0x100) | |
436 | a <<= 1; | |
437 | return a; | |
438 | } | |
1da177e4 LT |
439 | } |
440 | ||
441 | static void update_attr(struct vc_data *vc) | |
442 | { | |
fa6ce9ab JE |
443 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
444 | vc->vc_blink, vc->vc_underline, | |
445 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
446 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
1da177e4 LT |
447 | } |
448 | ||
449 | /* Note: inverting the screen twice should revert to the original state */ | |
450 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
451 | { | |
452 | unsigned short *p; | |
453 | ||
454 | WARN_CONSOLE_UNLOCKED(); | |
455 | ||
456 | count /= 2; | |
457 | p = screenpos(vc, offset, viewed); | |
6af39ed3 | 458 | if (vc->vc_sw->con_invert_region) { |
1da177e4 | 459 | vc->vc_sw->con_invert_region(vc, p, count); |
6af39ed3 | 460 | } else { |
1da177e4 LT |
461 | u16 *q = p; |
462 | int cnt = count; | |
463 | u16 a; | |
464 | ||
465 | if (!vc->vc_can_do_color) { | |
466 | while (cnt--) { | |
467 | a = scr_readw(q); | |
468 | a ^= 0x0800; | |
469 | scr_writew(a, q); | |
470 | q++; | |
471 | } | |
472 | } else if (vc->vc_hi_font_mask == 0x100) { | |
473 | while (cnt--) { | |
474 | a = scr_readw(q); | |
475 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
476 | scr_writew(a, q); | |
477 | q++; | |
478 | } | |
479 | } else { | |
480 | while (cnt--) { | |
481 | a = scr_readw(q); | |
482 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
483 | scr_writew(a, q); | |
484 | q++; | |
485 | } | |
486 | } | |
487 | } | |
6af39ed3 | 488 | |
6ca8dfd7 | 489 | if (con_should_update(vc)) |
1da177e4 | 490 | do_update_region(vc, (unsigned long) p, count); |
19e3ae6b | 491 | notify_update(vc); |
1da177e4 LT |
492 | } |
493 | ||
494 | /* used by selection: complement pointer position */ | |
495 | void complement_pos(struct vc_data *vc, int offset) | |
496 | { | |
414edcd3 | 497 | static int old_offset = -1; |
1da177e4 LT |
498 | static unsigned short old; |
499 | static unsigned short oldx, oldy; | |
500 | ||
501 | WARN_CONSOLE_UNLOCKED(); | |
502 | ||
414edcd3 AD |
503 | if (old_offset != -1 && old_offset >= 0 && |
504 | old_offset < vc->vc_screenbuf_size) { | |
505 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
6ca8dfd7 | 506 | if (con_should_update(vc)) |
1da177e4 | 507 | vc->vc_sw->con_putc(vc, old, oldy, oldx); |
19e3ae6b | 508 | notify_update(vc); |
1da177e4 | 509 | } |
414edcd3 AD |
510 | |
511 | old_offset = offset; | |
512 | ||
513 | if (offset != -1 && offset >= 0 && | |
514 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 515 | unsigned short new; |
414edcd3 | 516 | unsigned short *p; |
1da177e4 LT |
517 | p = screenpos(vc, offset, 1); |
518 | old = scr_readw(p); | |
519 | new = old ^ vc->vc_complement_mask; | |
520 | scr_writew(new, p); | |
6ca8dfd7 | 521 | if (con_should_update(vc)) { |
1da177e4 LT |
522 | oldx = (offset >> 1) % vc->vc_cols; |
523 | oldy = (offset >> 1) / vc->vc_cols; | |
524 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
525 | } | |
19e3ae6b | 526 | notify_update(vc); |
1da177e4 LT |
527 | } |
528 | } | |
529 | ||
530 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
531 | { | |
81732c3b | 532 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 533 | |
a883b70d | 534 | scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b | 535 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
1da177e4 | 536 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 537 | if (con_should_update(vc)) |
81732c3b | 538 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 539 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
540 | } |
541 | ||
542 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
543 | { | |
81732c3b | 544 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 545 | |
b1a925f4 | 546 | scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b JFM |
547 | scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, |
548 | nr * 2); | |
1da177e4 | 549 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 550 | if (con_should_update(vc)) |
81732c3b | 551 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 552 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
553 | } |
554 | ||
e882f715 | 555 | static int softcursor_original = -1; |
1da177e4 LT |
556 | |
557 | static void add_softcursor(struct vc_data *vc) | |
558 | { | |
559 | int i = scr_readw((u16 *) vc->vc_pos); | |
560 | u32 type = vc->vc_cursor_type; | |
561 | ||
562 | if (! (type & 0x10)) return; | |
563 | if (softcursor_original != -1) return; | |
564 | softcursor_original = i; | |
565 | i |= ((type >> 8) & 0xff00 ); | |
566 | i ^= ((type) & 0xff00 ); | |
567 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
568 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
569 | scr_writew(i, (u16 *) vc->vc_pos); | |
6ca8dfd7 | 570 | if (con_should_update(vc)) |
1da177e4 LT |
571 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); |
572 | } | |
573 | ||
574 | static void hide_softcursor(struct vc_data *vc) | |
575 | { | |
576 | if (softcursor_original != -1) { | |
577 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
6ca8dfd7 | 578 | if (con_should_update(vc)) |
1da177e4 LT |
579 | vc->vc_sw->con_putc(vc, softcursor_original, |
580 | vc->vc_y, vc->vc_x); | |
581 | softcursor_original = -1; | |
582 | } | |
583 | } | |
584 | ||
585 | static void hide_cursor(struct vc_data *vc) | |
586 | { | |
587 | if (vc == sel_cons) | |
588 | clear_selection(); | |
589 | vc->vc_sw->con_cursor(vc, CM_ERASE); | |
590 | hide_softcursor(vc); | |
591 | } | |
592 | ||
593 | static void set_cursor(struct vc_data *vc) | |
594 | { | |
6ca8dfd7 | 595 | if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS) |
1da177e4 LT |
596 | return; |
597 | if (vc->vc_deccm) { | |
598 | if (vc == sel_cons) | |
599 | clear_selection(); | |
600 | add_softcursor(vc); | |
601 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
602 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
603 | } else | |
604 | hide_cursor(vc); | |
605 | } | |
606 | ||
607 | static void set_origin(struct vc_data *vc) | |
608 | { | |
609 | WARN_CONSOLE_UNLOCKED(); | |
610 | ||
6ca8dfd7 | 611 | if (!con_is_visible(vc) || |
1da177e4 LT |
612 | !vc->vc_sw->con_set_origin || |
613 | !vc->vc_sw->con_set_origin(vc)) | |
614 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
615 | vc->vc_visible_origin = vc->vc_origin; | |
616 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
617 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
618 | } | |
619 | ||
c0f160a7 | 620 | static void save_screen(struct vc_data *vc) |
1da177e4 LT |
621 | { |
622 | WARN_CONSOLE_UNLOCKED(); | |
623 | ||
624 | if (vc->vc_sw->con_save_screen) | |
625 | vc->vc_sw->con_save_screen(vc); | |
626 | } | |
627 | ||
bcd375f7 MS |
628 | static void flush_scrollback(struct vc_data *vc) |
629 | { | |
630 | WARN_CONSOLE_UNLOCKED(); | |
631 | ||
632 | if (vc->vc_sw->con_flush_scrollback) | |
633 | vc->vc_sw->con_flush_scrollback(vc); | |
634 | } | |
635 | ||
1da177e4 LT |
636 | /* |
637 | * Redrawing of screen | |
638 | */ | |
639 | ||
2a248307 | 640 | void clear_buffer_attributes(struct vc_data *vc) |
1da177e4 LT |
641 | { |
642 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
643 | int count = vc->vc_screenbuf_size / 2; | |
644 | int mask = vc->vc_hi_font_mask | 0xff; | |
645 | ||
646 | for (; count > 0; count--, p++) { | |
647 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
648 | } | |
649 | } | |
650 | ||
651 | void redraw_screen(struct vc_data *vc, int is_switch) | |
652 | { | |
653 | int redraw = 0; | |
654 | ||
655 | WARN_CONSOLE_UNLOCKED(); | |
656 | ||
657 | if (!vc) { | |
658 | /* strange ... */ | |
659 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
660 | return; | |
661 | } | |
662 | ||
663 | if (is_switch) { | |
664 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
665 | if (old_vc == vc) | |
666 | return; | |
6ca8dfd7 | 667 | if (!con_is_visible(vc)) |
1da177e4 LT |
668 | redraw = 1; |
669 | *vc->vc_display_fg = vc; | |
670 | fg_console = vc->vc_num; | |
671 | hide_cursor(old_vc); | |
6ca8dfd7 | 672 | if (!con_is_visible(old_vc)) { |
1da177e4 LT |
673 | save_screen(old_vc); |
674 | set_origin(old_vc); | |
675 | } | |
fbc92a34 KS |
676 | if (tty0dev) |
677 | sysfs_notify(&tty0dev->kobj, NULL, "active"); | |
1da177e4 LT |
678 | } else { |
679 | hide_cursor(vc); | |
680 | redraw = 1; | |
681 | } | |
682 | ||
683 | if (redraw) { | |
684 | int update; | |
685 | int old_was_color = vc->vc_can_do_color; | |
686 | ||
687 | set_origin(vc); | |
688 | update = vc->vc_sw->con_switch(vc); | |
689 | set_palette(vc); | |
690 | /* | |
691 | * If console changed from mono<->color, the best we can do | |
692 | * is to clear the buffer attributes. As it currently stands, | |
693 | * rebuilding new attributes from the old buffer is not doable | |
694 | * without overly complex code. | |
695 | */ | |
696 | if (old_was_color != vc->vc_can_do_color) { | |
697 | update_attr(vc); | |
698 | clear_buffer_attributes(vc); | |
699 | } | |
8fd4bd22 JB |
700 | |
701 | /* Forcibly update if we're panicing */ | |
702 | if ((update && vc->vc_mode != KD_GRAPHICS) || | |
703 | vt_force_oops_output(vc)) | |
1da177e4 LT |
704 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
705 | } | |
706 | set_cursor(vc); | |
707 | if (is_switch) { | |
708 | set_leds(); | |
709 | compute_shiftstate(); | |
8182ec49 | 710 | notify_update(vc); |
1da177e4 LT |
711 | } |
712 | } | |
713 | ||
714 | /* | |
715 | * Allocation, freeing and resizing of VTs. | |
716 | */ | |
717 | ||
718 | int vc_cons_allocated(unsigned int i) | |
719 | { | |
720 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
721 | } | |
722 | ||
723 | static void visual_init(struct vc_data *vc, int num, int init) | |
724 | { | |
725 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
726 | if (vc->vc_sw) | |
727 | module_put(vc->vc_sw->owner); | |
728 | vc->vc_sw = conswitchp; | |
729 | #ifndef VT_SINGLE_DRIVER | |
730 | if (con_driver_map[num]) | |
731 | vc->vc_sw = con_driver_map[num]; | |
732 | #endif | |
733 | __module_get(vc->vc_sw->owner); | |
734 | vc->vc_num = num; | |
735 | vc->vc_display_fg = &master_display_fg; | |
08b33249 DZ |
736 | if (vc->vc_uni_pagedir_loc) |
737 | con_free_unimap(vc); | |
1da177e4 | 738 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
e4bdab70 | 739 | vc->vc_uni_pagedir = NULL; |
1da177e4 LT |
740 | vc->vc_hi_font_mask = 0; |
741 | vc->vc_complement_mask = 0; | |
742 | vc->vc_can_do_color = 0; | |
8fd4bd22 | 743 | vc->vc_panic_force_write = false; |
1b45996d | 744 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
745 | vc->vc_sw->con_init(vc, init); |
746 | if (!vc->vc_complement_mask) | |
747 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
748 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
749 | vc->vc_size_row = vc->vc_cols << 1; | |
750 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
751 | } | |
752 | ||
753 | int vc_allocate(unsigned int currcons) /* return 0 on success */ | |
754 | { | |
34902b7f JS |
755 | struct vt_notifier_param param; |
756 | struct vc_data *vc; | |
757 | ||
1da177e4 LT |
758 | WARN_CONSOLE_UNLOCKED(); |
759 | ||
760 | if (currcons >= MAX_NR_CONSOLES) | |
761 | return -ENXIO; | |
34902b7f JS |
762 | |
763 | if (vc_cons[currcons].d) | |
764 | return 0; | |
765 | ||
766 | /* due to the granularity of kmalloc, we waste some memory here */ | |
767 | /* the alloc is done in two steps, to optimize the common situation | |
768 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
769 | /* although the numbers above are not valid since long ago, the | |
770 | point is still up-to-date and the comment still has its value | |
771 | even if only as a historical artifact. --mj, July 1998 */ | |
772 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); | |
773 | if (!vc) | |
1da177e4 | 774 | return -ENOMEM; |
34902b7f JS |
775 | |
776 | vc_cons[currcons].d = vc; | |
777 | tty_port_init(&vc->port); | |
778 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); | |
779 | ||
780 | visual_init(vc, currcons, 1); | |
781 | ||
782 | if (!*vc->vc_uni_pagedir_loc) | |
1da177e4 | 783 | con_set_default_unimap(vc); |
f6c06b68 | 784 | |
34902b7f JS |
785 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
786 | if (!vc->vc_screenbuf) | |
787 | goto err_free; | |
788 | ||
789 | /* If no drivers have overridden us and the user didn't pass a | |
790 | boot option, default to displaying the cursor */ | |
791 | if (global_cursor_default == -1) | |
792 | global_cursor_default = 1; | |
793 | ||
794 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); | |
795 | vcs_make_sysfs(currcons); | |
796 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); | |
f6c06b68 | 797 | |
1da177e4 | 798 | return 0; |
34902b7f JS |
799 | err_free: |
800 | kfree(vc); | |
801 | vc_cons[currcons].d = NULL; | |
802 | return -ENOMEM; | |
1da177e4 LT |
803 | } |
804 | ||
e400b6ec AD |
805 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
806 | int user) | |
1da177e4 LT |
807 | { |
808 | /* Resizes the resolution of the display adapater */ | |
809 | int err = 0; | |
810 | ||
811 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
812 | err = vc->vc_sw->con_resize(vc, width, height, user); |
813 | ||
1da177e4 LT |
814 | return err; |
815 | } | |
816 | ||
817 | /* | |
818 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
819 | * [this is to be used together with some user program | |
820 | * like resize that changes the hardware videomode] | |
821 | */ | |
822 | #define VC_RESIZE_MAXCOL (32767) | |
823 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
824 | |
825 | /** | |
826 | * vc_do_resize - resizing method for the tty | |
827 | * @tty: tty being resized | |
828 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
829 | * @vc: virtual console private data | |
830 | * @cols: columns | |
831 | * @lines: lines | |
832 | * | |
833 | * Resize a virtual console, clipping according to the actual constraints. | |
834 | * If the caller passes a tty structure then update the termios winsize | |
3ad2f3fb | 835 | * information and perform any necessary signal handling. |
8c9a9dd0 | 836 | * |
6a1c0680 | 837 | * Caller must hold the console semaphore. Takes the termios rwsem and |
8c9a9dd0 AC |
838 | * ctrl_lock of the tty IFF a tty is passed. |
839 | */ | |
840 | ||
fc6f6238 AC |
841 | static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
842 | unsigned int cols, unsigned int lines) | |
1da177e4 LT |
843 | { |
844 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
9e0ba741 | 845 | unsigned long end; |
f2ee4ae8 | 846 | unsigned int old_rows, old_row_size; |
1da177e4 | 847 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
9e0ba741 | 848 | unsigned int user; |
1da177e4 LT |
849 | unsigned short *newscreen; |
850 | ||
851 | WARN_CONSOLE_UNLOCKED(); | |
852 | ||
853 | if (!vc) | |
854 | return -ENXIO; | |
855 | ||
e400b6ec AD |
856 | user = vc->vc_resize_user; |
857 | vc->vc_resize_user = 0; | |
858 | ||
1da177e4 LT |
859 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
860 | return -EINVAL; | |
861 | ||
862 | new_cols = (cols ? cols : vc->vc_cols); | |
863 | new_rows = (lines ? lines : vc->vc_rows); | |
864 | new_row_size = new_cols << 1; | |
865 | new_screen_size = new_row_size * new_rows; | |
866 | ||
867 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
868 | return 0; | |
869 | ||
32b2921e DV |
870 | if (new_screen_size > (4 << 20)) |
871 | return -EINVAL; | |
5cbded58 | 872 | newscreen = kmalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
873 | if (!newscreen) |
874 | return -ENOMEM; | |
875 | ||
009e39ae SD |
876 | if (vc == sel_cons) |
877 | clear_selection(); | |
878 | ||
1da177e4 | 879 | old_rows = vc->vc_rows; |
1da177e4 | 880 | old_row_size = vc->vc_size_row; |
1da177e4 | 881 | |
e400b6ec | 882 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
883 | if (err) { |
884 | kfree(newscreen); | |
885 | return err; | |
886 | } | |
887 | ||
888 | vc->vc_rows = new_rows; | |
889 | vc->vc_cols = new_cols; | |
890 | vc->vc_size_row = new_row_size; | |
891 | vc->vc_screenbuf_size = new_screen_size; | |
892 | ||
893 | rlth = min(old_row_size, new_row_size); | |
894 | rrem = new_row_size - rlth; | |
895 | old_origin = vc->vc_origin; | |
896 | new_origin = (long) newscreen; | |
897 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
898 | |
899 | if (vc->vc_y > new_rows) { | |
900 | if (old_rows - vc->vc_y < new_rows) { | |
901 | /* | |
902 | * Cursor near the bottom, copy contents from the | |
903 | * bottom of buffer | |
904 | */ | |
905 | old_origin += (old_rows - new_rows) * old_row_size; | |
3b41dc1a AD |
906 | } else { |
907 | /* | |
908 | * Cursor is in no man's land, copy 1/2 screenful | |
909 | * from the top and bottom of cursor position | |
910 | */ | |
911 | old_origin += (vc->vc_y - new_rows/2) * old_row_size; | |
3b41dc1a | 912 | } |
9fc2b2d0 FJ |
913 | } |
914 | ||
915 | end = old_origin + old_row_size * min(old_rows, new_rows); | |
1da177e4 LT |
916 | |
917 | update_attr(vc); | |
918 | ||
3b41dc1a AD |
919 | while (old_origin < end) { |
920 | scr_memcpyw((unsigned short *) new_origin, | |
921 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 922 | if (rrem) |
3b41dc1a AD |
923 | scr_memsetw((void *)(new_origin + rlth), |
924 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
925 | old_origin += old_row_size; |
926 | new_origin += new_row_size; | |
927 | } | |
928 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
929 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
930 | new_scr_end - new_origin); | |
5c9228f0 | 931 | kfree(vc->vc_screenbuf); |
1da177e4 | 932 | vc->vc_screenbuf = newscreen; |
1da177e4 LT |
933 | vc->vc_screenbuf_size = new_screen_size; |
934 | set_origin(vc); | |
935 | ||
936 | /* do part of a reset_terminal() */ | |
937 | vc->vc_top = 0; | |
938 | vc->vc_bottom = vc->vc_rows; | |
939 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
940 | save_cur(vc); | |
941 | ||
8c9a9dd0 AC |
942 | if (tty) { |
943 | /* Rewrite the requested winsize data with the actual | |
944 | resulting sizes */ | |
945 | struct winsize ws; | |
1da177e4 LT |
946 | memset(&ws, 0, sizeof(ws)); |
947 | ws.ws_row = vc->vc_rows; | |
948 | ws.ws_col = vc->vc_cols; | |
949 | ws.ws_ypixel = vc->vc_scan_lines; | |
fc6f6238 | 950 | tty_do_resize(tty, &ws); |
1da177e4 LT |
951 | } |
952 | ||
6ca8dfd7 | 953 | if (con_is_visible(vc)) |
1da177e4 | 954 | update_screen(vc); |
8b92e87d | 955 | vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
1da177e4 LT |
956 | return err; |
957 | } | |
958 | ||
8c9a9dd0 AC |
959 | /** |
960 | * vc_resize - resize a VT | |
961 | * @vc: virtual console | |
962 | * @cols: columns | |
963 | * @rows: rows | |
964 | * | |
965 | * Resize a virtual console as seen from the console end of things. We | |
966 | * use the common vc_do_resize methods to update the structures. The | |
967 | * caller must hold the console sem to protect console internals and | |
8ce73264 | 968 | * vc->port.tty |
8c9a9dd0 AC |
969 | */ |
970 | ||
971 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
972 | { | |
8ce73264 | 973 | return vc_do_resize(vc->port.tty, vc, cols, rows); |
8c9a9dd0 AC |
974 | } |
975 | ||
976 | /** | |
977 | * vt_resize - resize a VT | |
978 | * @tty: tty to resize | |
8c9a9dd0 AC |
979 | * @ws: winsize attributes |
980 | * | |
981 | * Resize a virtual terminal. This is called by the tty layer as we | |
982 | * register our own handler for resizing. The mutual helper does all | |
983 | * the actual work. | |
984 | * | |
985 | * Takes the console sem and the called methods then take the tty | |
6a1c0680 | 986 | * termios_rwsem and the tty ctrl_lock in that order. |
8c9a9dd0 | 987 | */ |
da2bdf9a | 988 | static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
ca9bda00 | 989 | { |
8c9a9dd0 AC |
990 | struct vc_data *vc = tty->driver_data; |
991 | int ret; | |
ca9bda00 | 992 | |
ac751efa | 993 | console_lock(); |
fc6f6238 | 994 | ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
ac751efa | 995 | console_unlock(); |
8c9a9dd0 | 996 | return ret; |
ca9bda00 | 997 | } |
1da177e4 | 998 | |
421b40a6 | 999 | struct vc_data *vc_deallocate(unsigned int currcons) |
1da177e4 | 1000 | { |
421b40a6 PH |
1001 | struct vc_data *vc = NULL; |
1002 | ||
1da177e4 LT |
1003 | WARN_CONSOLE_UNLOCKED(); |
1004 | ||
1005 | if (vc_cons_allocated(currcons)) { | |
421b40a6 | 1006 | struct vt_notifier_param param; |
4995f8ef | 1007 | |
421b40a6 | 1008 | param.vc = vc = vc_cons[currcons].d; |
b293d758 | 1009 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
4995f8ef | 1010 | vcs_remove_sysfs(currcons); |
1da177e4 | 1011 | vc->vc_sw->con_deinit(vc); |
bde0d2c9 | 1012 | put_pid(vc->vt_pid); |
d459ec0b | 1013 | module_put(vc->vc_sw->owner); |
5c9228f0 | 1014 | kfree(vc->vc_screenbuf); |
1da177e4 LT |
1015 | vc_cons[currcons].d = NULL; |
1016 | } | |
421b40a6 | 1017 | return vc; |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | /* | |
1021 | * VT102 emulator | |
1022 | */ | |
1023 | ||
079c9534 AC |
1024 | #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) |
1025 | #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) | |
1026 | #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) | |
1da177e4 LT |
1027 | |
1028 | #define decarm VC_REPEAT | |
1029 | #define decckm VC_CKMODE | |
1030 | #define kbdapplic VC_APPLIC | |
1031 | #define lnm VC_CRLF | |
1032 | ||
1033 | /* | |
1034 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1035 | */ | |
1036 | #define VT100ID "\033[?1;2c" | |
1037 | #define VT102ID "\033[?6c" | |
1038 | ||
8ede5cce | 1039 | const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, |
1da177e4 LT |
1040 | 8,12,10,14, 9,13,11,15 }; |
1041 | ||
1042 | /* the default colour table, for VGA+ colour systems */ | |
91e74ca5 JS |
1043 | unsigned char default_red[] = { |
1044 | 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, | |
1045 | 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff | |
1046 | }; | |
1047 | module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); | |
1048 | ||
1049 | unsigned char default_grn[] = { | |
1050 | 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, | |
1051 | 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff | |
1052 | }; | |
1053 | module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); | |
1054 | ||
1055 | unsigned char default_blu[] = { | |
1056 | 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, | |
1057 | 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff | |
1058 | }; | |
1059 | module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR); | |
1c2bbe6a | 1060 | |
1da177e4 LT |
1061 | /* |
1062 | * gotoxy() must verify all boundaries, because the arguments | |
1063 | * might also be negative. If the given position is out of | |
1064 | * bounds, the cursor is placed at the nearest margin. | |
1065 | */ | |
1066 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) | |
1067 | { | |
1068 | int min_y, max_y; | |
1069 | ||
1070 | if (new_x < 0) | |
1071 | vc->vc_x = 0; | |
1072 | else { | |
1073 | if (new_x >= vc->vc_cols) | |
1074 | vc->vc_x = vc->vc_cols - 1; | |
1075 | else | |
1076 | vc->vc_x = new_x; | |
1077 | } | |
1078 | ||
1079 | if (vc->vc_decom) { | |
1080 | min_y = vc->vc_top; | |
1081 | max_y = vc->vc_bottom; | |
1082 | } else { | |
1083 | min_y = 0; | |
1084 | max_y = vc->vc_rows; | |
1085 | } | |
1086 | if (new_y < min_y) | |
1087 | vc->vc_y = min_y; | |
1088 | else if (new_y >= max_y) | |
1089 | vc->vc_y = max_y - 1; | |
1090 | else | |
1091 | vc->vc_y = new_y; | |
1092 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); | |
1093 | vc->vc_need_wrap = 0; | |
1094 | } | |
1095 | ||
1096 | /* for absolute user moves, when decom is set */ | |
1097 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) | |
1098 | { | |
1099 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); | |
1100 | } | |
1101 | ||
1b0ec88a | 1102 | void scrollback(struct vc_data *vc) |
1da177e4 | 1103 | { |
1b0ec88a | 1104 | scrolldelta(-(vc->vc_rows / 2)); |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | void scrollfront(struct vc_data *vc, int lines) | |
1108 | { | |
1109 | if (!lines) | |
1110 | lines = vc->vc_rows / 2; | |
1111 | scrolldelta(lines); | |
1112 | } | |
1113 | ||
1114 | static void lf(struct vc_data *vc) | |
1115 | { | |
1116 | /* don't scroll if above bottom of scrolling region, or | |
1117 | * if below scrolling region | |
1118 | */ | |
1119 | if (vc->vc_y + 1 == vc->vc_bottom) | |
89765b94 | 1120 | con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1); |
1da177e4 LT |
1121 | else if (vc->vc_y < vc->vc_rows - 1) { |
1122 | vc->vc_y++; | |
1123 | vc->vc_pos += vc->vc_size_row; | |
1124 | } | |
1125 | vc->vc_need_wrap = 0; | |
b293d758 | 1126 | notify_write(vc, '\n'); |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | static void ri(struct vc_data *vc) | |
1130 | { | |
1131 | /* don't scroll if below top of scrolling region, or | |
1132 | * if above scrolling region | |
1133 | */ | |
1134 | if (vc->vc_y == vc->vc_top) | |
89765b94 | 1135 | con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1); |
1da177e4 LT |
1136 | else if (vc->vc_y > 0) { |
1137 | vc->vc_y--; | |
1138 | vc->vc_pos -= vc->vc_size_row; | |
1139 | } | |
1140 | vc->vc_need_wrap = 0; | |
1141 | } | |
1142 | ||
1143 | static inline void cr(struct vc_data *vc) | |
1144 | { | |
1145 | vc->vc_pos -= vc->vc_x << 1; | |
1146 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1147 | notify_write(vc, '\r'); |
1da177e4 LT |
1148 | } |
1149 | ||
1150 | static inline void bs(struct vc_data *vc) | |
1151 | { | |
1152 | if (vc->vc_x) { | |
1153 | vc->vc_pos -= 2; | |
1154 | vc->vc_x--; | |
1155 | vc->vc_need_wrap = 0; | |
b293d758 | 1156 | notify_write(vc, '\b'); |
1da177e4 LT |
1157 | } |
1158 | } | |
1159 | ||
1160 | static inline void del(struct vc_data *vc) | |
1161 | { | |
1162 | /* ignored */ | |
1163 | } | |
1164 | ||
1165 | static void csi_J(struct vc_data *vc, int vpar) | |
1166 | { | |
1167 | unsigned int count; | |
1168 | unsigned short * start; | |
1169 | ||
1170 | switch (vpar) { | |
1171 | case 0: /* erase from cursor to end of display */ | |
1172 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; | |
1173 | start = (unsigned short *)vc->vc_pos; | |
1da177e4 LT |
1174 | break; |
1175 | case 1: /* erase from start to cursor */ | |
1176 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; | |
1177 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 | 1178 | break; |
f8df13e0 PP |
1179 | case 3: /* erase scroll-back buffer (and whole display) */ |
1180 | scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, | |
42acfc66 | 1181 | vc->vc_screenbuf_size); |
bcd375f7 | 1182 | flush_scrollback(vc); |
f8df13e0 | 1183 | set_origin(vc); |
6ca8dfd7 | 1184 | if (con_is_visible(vc)) |
0930b095 | 1185 | update_screen(vc); |
f8df13e0 | 1186 | /* fall through */ |
1da177e4 LT |
1187 | case 2: /* erase whole display */ |
1188 | count = vc->vc_cols * vc->vc_rows; | |
1189 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 LT |
1190 | break; |
1191 | default: | |
1192 | return; | |
1193 | } | |
1194 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
6ca8dfd7 | 1195 | if (con_should_update(vc)) |
81732c3b | 1196 | do_update_region(vc, (unsigned long) start, count); |
1da177e4 LT |
1197 | vc->vc_need_wrap = 0; |
1198 | } | |
1199 | ||
1200 | static void csi_K(struct vc_data *vc, int vpar) | |
1201 | { | |
1202 | unsigned int count; | |
1203 | unsigned short * start; | |
1204 | ||
1205 | switch (vpar) { | |
1206 | case 0: /* erase from cursor to end of line */ | |
1207 | count = vc->vc_cols - vc->vc_x; | |
1208 | start = (unsigned short *)vc->vc_pos; | |
1da177e4 LT |
1209 | break; |
1210 | case 1: /* erase from start of line to cursor */ | |
1211 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1212 | count = vc->vc_x + 1; | |
1da177e4 LT |
1213 | break; |
1214 | case 2: /* erase whole line */ | |
1215 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1216 | count = vc->vc_cols; | |
1da177e4 LT |
1217 | break; |
1218 | default: | |
1219 | return; | |
1220 | } | |
1221 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1222 | vc->vc_need_wrap = 0; | |
6ca8dfd7 | 1223 | if (con_should_update(vc)) |
81732c3b | 1224 | do_update_region(vc, (unsigned long) start, count); |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1228 | { /* not vt100? */ | |
1229 | int count; | |
1230 | ||
1231 | if (!vpar) | |
1232 | vpar++; | |
1233 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1234 | ||
1235 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); | |
6ca8dfd7 | 1236 | if (con_should_update(vc)) |
1da177e4 LT |
1237 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); |
1238 | vc->vc_need_wrap = 0; | |
1239 | } | |
1240 | ||
1241 | static void default_attr(struct vc_data *vc) | |
1242 | { | |
1243 | vc->vc_intensity = 1; | |
fa6ce9ab | 1244 | vc->vc_italic = 0; |
1da177e4 LT |
1245 | vc->vc_underline = 0; |
1246 | vc->vc_reverse = 0; | |
1247 | vc->vc_blink = 0; | |
1248 | vc->vc_color = vc->vc_def_color; | |
1249 | } | |
1250 | ||
cec5b2a9 AB |
1251 | struct rgb { u8 r; u8 g; u8 b; }; |
1252 | ||
0f91e142 | 1253 | static void rgb_from_256(int i, struct rgb *c) |
cec5b2a9 | 1254 | { |
cec5b2a9 | 1255 | if (i < 8) { /* Standard colours. */ |
0f91e142 JS |
1256 | c->r = i&1 ? 0xaa : 0x00; |
1257 | c->g = i&2 ? 0xaa : 0x00; | |
1258 | c->b = i&4 ? 0xaa : 0x00; | |
cec5b2a9 | 1259 | } else if (i < 16) { |
0f91e142 JS |
1260 | c->r = i&1 ? 0xff : 0x55; |
1261 | c->g = i&2 ? 0xff : 0x55; | |
1262 | c->b = i&4 ? 0xff : 0x55; | |
cec5b2a9 | 1263 | } else if (i < 232) { /* 6x6x6 colour cube. */ |
0f91e142 JS |
1264 | c->r = (i - 16) / 36 * 85 / 2; |
1265 | c->g = (i - 16) / 6 % 6 * 85 / 2; | |
1266 | c->b = (i - 16) % 6 * 85 / 2; | |
cec5b2a9 | 1267 | } else /* Grayscale ramp. */ |
0f91e142 | 1268 | c->r = c->g = c->b = i * 10 - 2312; |
cec5b2a9 AB |
1269 | } |
1270 | ||
0f91e142 | 1271 | static void rgb_foreground(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 | 1272 | { |
193df022 JS |
1273 | u8 hue = 0, max = max3(c->r, c->g, c->b); |
1274 | ||
1275 | if (c->r > max / 2) | |
1276 | hue |= 4; | |
1277 | if (c->g > max / 2) | |
1278 | hue |= 2; | |
1279 | if (c->b > max / 2) | |
1280 | hue |= 1; | |
1281 | ||
1282 | if (hue == 7 && max <= 0x55) { | |
1283 | hue = 0; | |
1284 | vc->vc_intensity = 2; | |
1285 | } else if (max > 0xaa) | |
1286 | vc->vc_intensity = 2; | |
cec5b2a9 | 1287 | else |
193df022 JS |
1288 | vc->vc_intensity = 1; |
1289 | ||
cec5b2a9 AB |
1290 | vc->vc_color = (vc->vc_color & 0xf0) | hue; |
1291 | } | |
1292 | ||
0f91e142 | 1293 | static void rgb_background(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 AB |
1294 | { |
1295 | /* For backgrounds, err on the dark side. */ | |
1296 | vc->vc_color = (vc->vc_color & 0x0f) | |
0f91e142 | 1297 | | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3; |
cec5b2a9 AB |
1298 | } |
1299 | ||
e05ab238 JS |
1300 | /* |
1301 | * ITU T.416 Higher colour modes. They break the usual properties of SGR codes | |
1302 | * and thus need to be detected and ignored by hand. Strictly speaking, that | |
1303 | * standard also wants : rather than ; as separators, contrary to ECMA-48, but | |
1304 | * no one produces such codes and almost no one accepts them. | |
1305 | * | |
1306 | * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in | |
1307 | * supporting them. | |
1308 | */ | |
1309 | static int vc_t416_color(struct vc_data *vc, int i, | |
0f91e142 | 1310 | void(*set_color)(struct vc_data *vc, const struct rgb *c)) |
e05ab238 | 1311 | { |
0f91e142 JS |
1312 | struct rgb c; |
1313 | ||
e05ab238 JS |
1314 | i++; |
1315 | if (i > vc->vc_npar) | |
1316 | return i; | |
1317 | ||
0bf1f4a8 | 1318 | if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) { |
3e7ec4a0 | 1319 | /* 256 colours */ |
e05ab238 | 1320 | i++; |
0f91e142 | 1321 | rgb_from_256(vc->vc_par[i], &c); |
669e0a51 | 1322 | } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) { |
3e7ec4a0 | 1323 | /* 24 bit */ |
0f91e142 JS |
1324 | c.r = vc->vc_par[i + 1]; |
1325 | c.g = vc->vc_par[i + 2]; | |
1326 | c.b = vc->vc_par[i + 3]; | |
e05ab238 | 1327 | i += 3; |
0f91e142 JS |
1328 | } else |
1329 | return i; | |
1330 | ||
1331 | set_color(vc, &c); | |
e05ab238 JS |
1332 | |
1333 | return i; | |
1334 | } | |
1335 | ||
ac751efa | 1336 | /* console_lock is held */ |
1da177e4 LT |
1337 | static void csi_m(struct vc_data *vc) |
1338 | { | |
1339 | int i; | |
1340 | ||
1341 | for (i = 0; i <= vc->vc_npar; i++) | |
1342 | switch (vc->vc_par[i]) { | |
aada0a34 JS |
1343 | case 0: /* all attributes off */ |
1344 | default_attr(vc); | |
1345 | break; | |
1346 | case 1: | |
1347 | vc->vc_intensity = 2; | |
1348 | break; | |
1349 | case 2: | |
1350 | vc->vc_intensity = 0; | |
1351 | break; | |
1352 | case 3: | |
1353 | vc->vc_italic = 1; | |
1354 | break; | |
1355 | case 4: | |
1356 | vc->vc_underline = 1; | |
1357 | break; | |
1358 | case 5: | |
1359 | vc->vc_blink = 1; | |
1360 | break; | |
1361 | case 7: | |
1362 | vc->vc_reverse = 1; | |
1363 | break; | |
1364 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1365 | * Select primary font, don't display control chars if | |
1366 | * defined, don't set bit 8 on output. | |
1367 | */ | |
1368 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1369 | ? vc->vc_G0_charset | |
1370 | : vc->vc_G1_charset, vc); | |
1371 | vc->vc_disp_ctrl = 0; | |
1372 | vc->vc_toggle_meta = 0; | |
1373 | break; | |
1374 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1375 | * Select first alternate font, lets chars < 32 be | |
1376 | * displayed as ROM chars. | |
1377 | */ | |
1378 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1379 | vc->vc_disp_ctrl = 1; | |
1380 | vc->vc_toggle_meta = 0; | |
1381 | break; | |
1382 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1383 | * Select second alternate font, toggle high bit | |
1384 | * before displaying as ROM char. | |
1385 | */ | |
1386 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1387 | vc->vc_disp_ctrl = 1; | |
1388 | vc->vc_toggle_meta = 1; | |
1389 | break; | |
1390 | case 21: | |
1391 | case 22: | |
1392 | vc->vc_intensity = 1; | |
1393 | break; | |
1394 | case 23: | |
1395 | vc->vc_italic = 0; | |
1396 | break; | |
1397 | case 24: | |
1398 | vc->vc_underline = 0; | |
1399 | break; | |
1400 | case 25: | |
1401 | vc->vc_blink = 0; | |
1402 | break; | |
1403 | case 27: | |
1404 | vc->vc_reverse = 0; | |
1405 | break; | |
1406 | case 38: | |
1407 | i = vc_t416_color(vc, i, rgb_foreground); | |
1408 | break; | |
1409 | case 48: | |
1410 | i = vc_t416_color(vc, i, rgb_background); | |
1411 | break; | |
1412 | case 39: | |
1413 | vc->vc_color = (vc->vc_def_color & 0x0f) | | |
1414 | (vc->vc_color & 0xf0); | |
1415 | break; | |
1416 | case 49: | |
1417 | vc->vc_color = (vc->vc_def_color & 0xf0) | | |
1418 | (vc->vc_color & 0x0f); | |
1419 | break; | |
1420 | default: | |
fadb4244 AB |
1421 | if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) { |
1422 | if (vc->vc_par[i] < 100) | |
1423 | vc->vc_intensity = 2; | |
cc67dc28 AB |
1424 | vc->vc_par[i] -= 60; |
1425 | } | |
aada0a34 JS |
1426 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
1427 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1428 | | (vc->vc_color & 0xf0); | |
1429 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1430 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1431 | | (vc->vc_color & 0x0f); | |
1432 | break; | |
1da177e4 LT |
1433 | } |
1434 | update_attr(vc); | |
1435 | } | |
1436 | ||
6732c8bb | 1437 | static void respond_string(const char *p, struct tty_port *port) |
1da177e4 LT |
1438 | { |
1439 | while (*p) { | |
6732c8bb | 1440 | tty_insert_flip_char(port, *p, 0); |
1da177e4 LT |
1441 | p++; |
1442 | } | |
6732c8bb | 1443 | tty_schedule_flip(port); |
1da177e4 LT |
1444 | } |
1445 | ||
1446 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1447 | { | |
1448 | char buf[40]; | |
1449 | ||
1450 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
6732c8bb | 1451 | respond_string(buf, tty->port); |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | static inline void status_report(struct tty_struct *tty) | |
1455 | { | |
6732c8bb | 1456 | respond_string("\033[0n", tty->port); /* Terminal ok */ |
1da177e4 LT |
1457 | } |
1458 | ||
6732c8bb | 1459 | static inline void respond_ID(struct tty_struct *tty) |
1da177e4 | 1460 | { |
6732c8bb | 1461 | respond_string(VT102ID, tty->port); |
1da177e4 LT |
1462 | } |
1463 | ||
1464 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1465 | { | |
1466 | char buf[8]; | |
1467 | ||
1468 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1469 | (char)('!' + mry)); | |
6732c8bb | 1470 | respond_string(buf, tty->port); |
1da177e4 LT |
1471 | } |
1472 | ||
1473 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ | |
1474 | int mouse_reporting(void) | |
1475 | { | |
1476 | return vc_cons[fg_console].d->vc_report_mouse; | |
1477 | } | |
1478 | ||
ac751efa | 1479 | /* console_lock is held */ |
1da177e4 LT |
1480 | static void set_mode(struct vc_data *vc, int on_off) |
1481 | { | |
1482 | int i; | |
1483 | ||
1484 | for (i = 0; i <= vc->vc_npar; i++) | |
1485 | if (vc->vc_ques) { | |
1486 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ | |
1487 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1488 | if (on_off) | |
1489 | set_kbd(vc, decckm); | |
1490 | else | |
1491 | clr_kbd(vc, decckm); | |
1492 | break; | |
1493 | case 3: /* 80/132 mode switch unimplemented */ | |
1da177e4 LT |
1494 | #if 0 |
1495 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1496 | /* this alone does not suffice; some user mode | |
1497 | utility has to change the hardware regs */ | |
1498 | #endif | |
1499 | break; | |
1500 | case 5: /* Inverted screen on/off */ | |
1501 | if (vc->vc_decscnm != on_off) { | |
1502 | vc->vc_decscnm = on_off; | |
1503 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1504 | update_attr(vc); | |
1505 | } | |
1506 | break; | |
1507 | case 6: /* Origin relative/absolute */ | |
1508 | vc->vc_decom = on_off; | |
1509 | gotoxay(vc, 0, 0); | |
1510 | break; | |
1511 | case 7: /* Autowrap on/off */ | |
1512 | vc->vc_decawm = on_off; | |
1513 | break; | |
1514 | case 8: /* Autorepeat on/off */ | |
1515 | if (on_off) | |
1516 | set_kbd(vc, decarm); | |
1517 | else | |
1518 | clr_kbd(vc, decarm); | |
1519 | break; | |
1520 | case 9: | |
1521 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1522 | break; | |
1523 | case 25: /* Cursor on/off */ | |
1524 | vc->vc_deccm = on_off; | |
1525 | break; | |
1526 | case 1000: | |
1527 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1528 | break; | |
1529 | } | |
1530 | } else { | |
1531 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1532 | case 3: /* Monitor (display ctrls) */ | |
1533 | vc->vc_disp_ctrl = on_off; | |
1534 | break; | |
1535 | case 4: /* Insert Mode on/off */ | |
1536 | vc->vc_decim = on_off; | |
1537 | break; | |
1538 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1539 | if (on_off) | |
1540 | set_kbd(vc, lnm); | |
1541 | else | |
1542 | clr_kbd(vc, lnm); | |
1543 | break; | |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | ||
ac751efa | 1548 | /* console_lock is held */ |
1da177e4 LT |
1549 | static void setterm_command(struct vc_data *vc) |
1550 | { | |
1551 | switch(vc->vc_par[0]) { | |
1552 | case 1: /* set color for underline mode */ | |
1553 | if (vc->vc_can_do_color && | |
1554 | vc->vc_par[1] < 16) { | |
1555 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1556 | if (vc->vc_underline) | |
1557 | update_attr(vc); | |
1558 | } | |
1559 | break; | |
1560 | case 2: /* set color for half intensity mode */ | |
1561 | if (vc->vc_can_do_color && | |
1562 | vc->vc_par[1] < 16) { | |
1563 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1564 | if (vc->vc_intensity == 0) | |
1565 | update_attr(vc); | |
1566 | } | |
1567 | break; | |
1568 | case 8: /* store colors as defaults */ | |
1569 | vc->vc_def_color = vc->vc_attr; | |
1570 | if (vc->vc_hi_font_mask == 0x100) | |
1571 | vc->vc_def_color >>= 1; | |
1572 | default_attr(vc); | |
1573 | update_attr(vc); | |
1574 | break; | |
1575 | case 9: /* set blanking interval */ | |
f324edc8 | 1576 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; |
1da177e4 LT |
1577 | poke_blanked_console(); |
1578 | break; | |
1579 | case 10: /* set bell frequency in Hz */ | |
1580 | if (vc->vc_npar >= 1) | |
1581 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1582 | else | |
1583 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1584 | break; | |
1585 | case 11: /* set bell duration in msec */ | |
1586 | if (vc->vc_npar >= 1) | |
1587 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
3372ec28 | 1588 | msecs_to_jiffies(vc->vc_par[1]) : 0; |
1da177e4 LT |
1589 | else |
1590 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1591 | break; | |
1592 | case 12: /* bring specified console to the front */ | |
1593 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1594 | set_console(vc->vc_par[1] - 1); | |
1595 | break; | |
1596 | case 13: /* unblank the screen */ | |
1597 | poke_blanked_console(); | |
1598 | break; | |
1599 | case 14: /* set vesa powerdown interval */ | |
1600 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1601 | break; | |
1602 | case 15: /* activate the previous console */ | |
1603 | set_console(last_console); | |
1604 | break; | |
bd63364c SD |
1605 | case 16: /* set cursor blink duration in msec */ |
1606 | if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && | |
1607 | vc->vc_par[1] <= USHRT_MAX) | |
1608 | vc->vc_cur_blink_ms = vc->vc_par[1]; | |
1609 | else | |
1610 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; | |
1611 | break; | |
1da177e4 LT |
1612 | } |
1613 | } | |
1614 | ||
ac751efa | 1615 | /* console_lock is held */ |
1da177e4 LT |
1616 | static void csi_at(struct vc_data *vc, unsigned int nr) |
1617 | { | |
1618 | if (nr > vc->vc_cols - vc->vc_x) | |
1619 | nr = vc->vc_cols - vc->vc_x; | |
1620 | else if (!nr) | |
1621 | nr = 1; | |
1622 | insert_char(vc, nr); | |
1623 | } | |
1624 | ||
ac751efa | 1625 | /* console_lock is held */ |
1da177e4 LT |
1626 | static void csi_L(struct vc_data *vc, unsigned int nr) |
1627 | { | |
1628 | if (nr > vc->vc_rows - vc->vc_y) | |
1629 | nr = vc->vc_rows - vc->vc_y; | |
1630 | else if (!nr) | |
1631 | nr = 1; | |
89765b94 | 1632 | con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_DOWN, nr); |
1da177e4 LT |
1633 | vc->vc_need_wrap = 0; |
1634 | } | |
1635 | ||
ac751efa | 1636 | /* console_lock is held */ |
1da177e4 LT |
1637 | static void csi_P(struct vc_data *vc, unsigned int nr) |
1638 | { | |
1639 | if (nr > vc->vc_cols - vc->vc_x) | |
1640 | nr = vc->vc_cols - vc->vc_x; | |
1641 | else if (!nr) | |
1642 | nr = 1; | |
1643 | delete_char(vc, nr); | |
1644 | } | |
1645 | ||
ac751efa | 1646 | /* console_lock is held */ |
1da177e4 LT |
1647 | static void csi_M(struct vc_data *vc, unsigned int nr) |
1648 | { | |
1649 | if (nr > vc->vc_rows - vc->vc_y) | |
1650 | nr = vc->vc_rows - vc->vc_y; | |
1651 | else if (!nr) | |
1652 | nr=1; | |
89765b94 | 1653 | con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_UP, nr); |
1da177e4 LT |
1654 | vc->vc_need_wrap = 0; |
1655 | } | |
1656 | ||
ac751efa | 1657 | /* console_lock is held (except via vc_init->reset_terminal */ |
1da177e4 LT |
1658 | static void save_cur(struct vc_data *vc) |
1659 | { | |
1660 | vc->vc_saved_x = vc->vc_x; | |
1661 | vc->vc_saved_y = vc->vc_y; | |
1662 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 1663 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
1664 | vc->vc_s_underline = vc->vc_underline; |
1665 | vc->vc_s_blink = vc->vc_blink; | |
1666 | vc->vc_s_reverse = vc->vc_reverse; | |
1667 | vc->vc_s_charset = vc->vc_charset; | |
1668 | vc->vc_s_color = vc->vc_color; | |
1669 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
1670 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
1671 | } | |
1672 | ||
ac751efa | 1673 | /* console_lock is held */ |
1da177e4 LT |
1674 | static void restore_cur(struct vc_data *vc) |
1675 | { | |
1676 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
1677 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 1678 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
1679 | vc->vc_underline = vc->vc_s_underline; |
1680 | vc->vc_blink = vc->vc_s_blink; | |
1681 | vc->vc_reverse = vc->vc_s_reverse; | |
1682 | vc->vc_charset = vc->vc_s_charset; | |
1683 | vc->vc_color = vc->vc_s_color; | |
1684 | vc->vc_G0_charset = vc->vc_saved_G0; | |
1685 | vc->vc_G1_charset = vc->vc_saved_G1; | |
1686 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
1687 | update_attr(vc); | |
1688 | vc->vc_need_wrap = 0; | |
1689 | } | |
1690 | ||
b290af68 | 1691 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, |
1da177e4 | 1692 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, |
63f3a16d | 1693 | ESpalette, ESosc }; |
1da177e4 | 1694 | |
ac751efa | 1695 | /* console_lock is held (except via vc_init()) */ |
1da177e4 LT |
1696 | static void reset_terminal(struct vc_data *vc, int do_clear) |
1697 | { | |
1698 | vc->vc_top = 0; | |
1699 | vc->vc_bottom = vc->vc_rows; | |
1700 | vc->vc_state = ESnormal; | |
1701 | vc->vc_ques = 0; | |
1702 | vc->vc_translate = set_translate(LAT1_MAP, vc); | |
1703 | vc->vc_G0_charset = LAT1_MAP; | |
1704 | vc->vc_G1_charset = GRAF_MAP; | |
1705 | vc->vc_charset = 0; | |
1706 | vc->vc_need_wrap = 0; | |
1707 | vc->vc_report_mouse = 0; | |
042f10ec | 1708 | vc->vc_utf = default_utf8; |
1da177e4 LT |
1709 | vc->vc_utf_count = 0; |
1710 | ||
1711 | vc->vc_disp_ctrl = 0; | |
1712 | vc->vc_toggle_meta = 0; | |
1713 | ||
1714 | vc->vc_decscnm = 0; | |
1715 | vc->vc_decom = 0; | |
1716 | vc->vc_decawm = 1; | |
f6c06b68 | 1717 | vc->vc_deccm = global_cursor_default; |
1da177e4 LT |
1718 | vc->vc_decim = 0; |
1719 | ||
079c9534 | 1720 | vt_reset_keyboard(vc->vc_num); |
1da177e4 | 1721 | |
9ea9a886 | 1722 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1723 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1724 | ||
1725 | default_attr(vc); | |
1726 | update_attr(vc); | |
1727 | ||
1728 | vc->vc_tab_stop[0] = 0x01010100; | |
1729 | vc->vc_tab_stop[1] = | |
1730 | vc->vc_tab_stop[2] = | |
1731 | vc->vc_tab_stop[3] = | |
a564738c WK |
1732 | vc->vc_tab_stop[4] = |
1733 | vc->vc_tab_stop[5] = | |
1734 | vc->vc_tab_stop[6] = | |
1735 | vc->vc_tab_stop[7] = 0x01010101; | |
1da177e4 LT |
1736 | |
1737 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1738 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
bd63364c | 1739 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
1740 | |
1741 | gotoxy(vc, 0, 0); | |
1742 | save_cur(vc); | |
1743 | if (do_clear) | |
1744 | csi_J(vc, 2); | |
1745 | } | |
1746 | ||
ac751efa | 1747 | /* console_lock is held */ |
1da177e4 LT |
1748 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
1749 | { | |
1750 | /* | |
1751 | * Control characters can be used in the _middle_ | |
1752 | * of an escape sequence. | |
1753 | */ | |
63f3a16d AB |
1754 | if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ |
1755 | return; | |
1da177e4 LT |
1756 | switch (c) { |
1757 | case 0: | |
1758 | return; | |
1759 | case 7: | |
63f3a16d AB |
1760 | if (vc->vc_state == ESosc) |
1761 | vc->vc_state = ESnormal; | |
1762 | else if (vc->vc_bell_duration) | |
1da177e4 LT |
1763 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); |
1764 | return; | |
1765 | case 8: | |
1766 | bs(vc); | |
1767 | return; | |
1768 | case 9: | |
1769 | vc->vc_pos -= (vc->vc_x << 1); | |
1770 | while (vc->vc_x < vc->vc_cols - 1) { | |
1771 | vc->vc_x++; | |
1772 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) | |
1773 | break; | |
1774 | } | |
1775 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 1776 | notify_write(vc, '\t'); |
1da177e4 LT |
1777 | return; |
1778 | case 10: case 11: case 12: | |
1779 | lf(vc); | |
1780 | if (!is_kbd(vc, lnm)) | |
1781 | return; | |
1782 | case 13: | |
1783 | cr(vc); | |
1784 | return; | |
1785 | case 14: | |
1786 | vc->vc_charset = 1; | |
1787 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
1788 | vc->vc_disp_ctrl = 1; | |
1789 | return; | |
1790 | case 15: | |
1791 | vc->vc_charset = 0; | |
1792 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
1793 | vc->vc_disp_ctrl = 0; | |
1794 | return; | |
1795 | case 24: case 26: | |
1796 | vc->vc_state = ESnormal; | |
1797 | return; | |
1798 | case 27: | |
1799 | vc->vc_state = ESesc; | |
1800 | return; | |
1801 | case 127: | |
1802 | del(vc); | |
1803 | return; | |
1804 | case 128+27: | |
1805 | vc->vc_state = ESsquare; | |
1806 | return; | |
1807 | } | |
1808 | switch(vc->vc_state) { | |
1809 | case ESesc: | |
1810 | vc->vc_state = ESnormal; | |
1811 | switch (c) { | |
1812 | case '[': | |
1813 | vc->vc_state = ESsquare; | |
1814 | return; | |
1815 | case ']': | |
1816 | vc->vc_state = ESnonstd; | |
1817 | return; | |
1818 | case '%': | |
1819 | vc->vc_state = ESpercent; | |
1820 | return; | |
1821 | case 'E': | |
1822 | cr(vc); | |
1823 | lf(vc); | |
1824 | return; | |
1825 | case 'M': | |
1826 | ri(vc); | |
1827 | return; | |
1828 | case 'D': | |
1829 | lf(vc); | |
1830 | return; | |
1831 | case 'H': | |
1832 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); | |
1833 | return; | |
1834 | case 'Z': | |
1835 | respond_ID(tty); | |
1836 | return; | |
1837 | case '7': | |
1838 | save_cur(vc); | |
1839 | return; | |
1840 | case '8': | |
1841 | restore_cur(vc); | |
1842 | return; | |
1843 | case '(': | |
1844 | vc->vc_state = ESsetG0; | |
1845 | return; | |
1846 | case ')': | |
1847 | vc->vc_state = ESsetG1; | |
1848 | return; | |
1849 | case '#': | |
1850 | vc->vc_state = EShash; | |
1851 | return; | |
1852 | case 'c': | |
1853 | reset_terminal(vc, 1); | |
1854 | return; | |
1855 | case '>': /* Numeric keypad */ | |
1856 | clr_kbd(vc, kbdapplic); | |
1857 | return; | |
1858 | case '=': /* Appl. keypad */ | |
1859 | set_kbd(vc, kbdapplic); | |
1860 | return; | |
1861 | } | |
1862 | return; | |
1863 | case ESnonstd: | |
1864 | if (c=='P') { /* palette escape sequence */ | |
1865 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1866 | vc->vc_par[vc->vc_npar] = 0; | |
1867 | vc->vc_npar = 0; | |
1868 | vc->vc_state = ESpalette; | |
1869 | return; | |
1870 | } else if (c=='R') { /* reset palette */ | |
1871 | reset_palette(vc); | |
1872 | vc->vc_state = ESnormal; | |
63f3a16d AB |
1873 | } else if (c>='0' && c<='9') |
1874 | vc->vc_state = ESosc; | |
1875 | else | |
1da177e4 LT |
1876 | vc->vc_state = ESnormal; |
1877 | return; | |
1878 | case ESpalette: | |
74c807ce AS |
1879 | if (isxdigit(c)) { |
1880 | vc->vc_par[vc->vc_npar++] = hex_to_bin(c); | |
1da177e4 LT |
1881 | if (vc->vc_npar == 7) { |
1882 | int i = vc->vc_par[0] * 3, j = 1; | |
1883 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1884 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
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 | set_palette(vc); | |
1890 | vc->vc_state = ESnormal; | |
1891 | } | |
1892 | } else | |
1893 | vc->vc_state = ESnormal; | |
1894 | return; | |
1895 | case ESsquare: | |
1896 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1897 | vc->vc_par[vc->vc_npar] = 0; | |
1898 | vc->vc_npar = 0; | |
1899 | vc->vc_state = ESgetpars; | |
1900 | if (c == '[') { /* Function key */ | |
1901 | vc->vc_state=ESfunckey; | |
1902 | return; | |
1903 | } | |
1904 | vc->vc_ques = (c == '?'); | |
1905 | if (vc->vc_ques) | |
1906 | return; | |
1907 | case ESgetpars: | |
1908 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
1909 | vc->vc_npar++; | |
1910 | return; | |
1911 | } else if (c>='0' && c<='9') { | |
1912 | vc->vc_par[vc->vc_npar] *= 10; | |
1913 | vc->vc_par[vc->vc_npar] += c - '0'; | |
1914 | return; | |
b290af68 | 1915 | } |
1da177e4 LT |
1916 | vc->vc_state = ESnormal; |
1917 | switch(c) { | |
1918 | case 'h': | |
1919 | set_mode(vc, 1); | |
1920 | return; | |
1921 | case 'l': | |
1922 | set_mode(vc, 0); | |
1923 | return; | |
1924 | case 'c': | |
1925 | if (vc->vc_ques) { | |
1926 | if (vc->vc_par[0]) | |
1927 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
1928 | else | |
9ea9a886 | 1929 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1930 | return; |
1931 | } | |
1932 | break; | |
1933 | case 'm': | |
1934 | if (vc->vc_ques) { | |
1935 | clear_selection(); | |
1936 | if (vc->vc_par[0]) | |
1937 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
1938 | else | |
1939 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1940 | return; | |
1941 | } | |
1942 | break; | |
1943 | case 'n': | |
1944 | if (!vc->vc_ques) { | |
1945 | if (vc->vc_par[0] == 5) | |
1946 | status_report(tty); | |
1947 | else if (vc->vc_par[0] == 6) | |
1948 | cursor_report(vc, tty); | |
1949 | } | |
1950 | return; | |
1951 | } | |
1952 | if (vc->vc_ques) { | |
1953 | vc->vc_ques = 0; | |
1954 | return; | |
1955 | } | |
1956 | switch(c) { | |
1957 | case 'G': case '`': | |
1958 | if (vc->vc_par[0]) | |
1959 | vc->vc_par[0]--; | |
1960 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
1961 | return; | |
1962 | case 'A': | |
1963 | if (!vc->vc_par[0]) | |
1964 | vc->vc_par[0]++; | |
1965 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
1966 | return; | |
1967 | case 'B': case 'e': | |
1968 | if (!vc->vc_par[0]) | |
1969 | vc->vc_par[0]++; | |
1970 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
1971 | return; | |
1972 | case 'C': case 'a': | |
1973 | if (!vc->vc_par[0]) | |
1974 | vc->vc_par[0]++; | |
1975 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
1976 | return; | |
1977 | case 'D': | |
1978 | if (!vc->vc_par[0]) | |
1979 | vc->vc_par[0]++; | |
1980 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
1981 | return; | |
1982 | case 'E': | |
1983 | if (!vc->vc_par[0]) | |
1984 | vc->vc_par[0]++; | |
1985 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
1986 | return; | |
1987 | case 'F': | |
1988 | if (!vc->vc_par[0]) | |
1989 | vc->vc_par[0]++; | |
1990 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
1991 | return; | |
1992 | case 'd': | |
1993 | if (vc->vc_par[0]) | |
1994 | vc->vc_par[0]--; | |
1995 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
1996 | return; | |
1997 | case 'H': case 'f': | |
1998 | if (vc->vc_par[0]) | |
1999 | vc->vc_par[0]--; | |
2000 | if (vc->vc_par[1]) | |
2001 | vc->vc_par[1]--; | |
2002 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
2003 | return; | |
2004 | case 'J': | |
2005 | csi_J(vc, vc->vc_par[0]); | |
2006 | return; | |
2007 | case 'K': | |
2008 | csi_K(vc, vc->vc_par[0]); | |
2009 | return; | |
2010 | case 'L': | |
2011 | csi_L(vc, vc->vc_par[0]); | |
2012 | return; | |
2013 | case 'M': | |
2014 | csi_M(vc, vc->vc_par[0]); | |
2015 | return; | |
2016 | case 'P': | |
2017 | csi_P(vc, vc->vc_par[0]); | |
2018 | return; | |
2019 | case 'c': | |
2020 | if (!vc->vc_par[0]) | |
2021 | respond_ID(tty); | |
2022 | return; | |
2023 | case 'g': | |
2024 | if (!vc->vc_par[0]) | |
2025 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); | |
2026 | else if (vc->vc_par[0] == 3) { | |
2027 | vc->vc_tab_stop[0] = | |
2028 | vc->vc_tab_stop[1] = | |
2029 | vc->vc_tab_stop[2] = | |
2030 | vc->vc_tab_stop[3] = | |
a564738c WK |
2031 | vc->vc_tab_stop[4] = |
2032 | vc->vc_tab_stop[5] = | |
2033 | vc->vc_tab_stop[6] = | |
2034 | vc->vc_tab_stop[7] = 0; | |
1da177e4 LT |
2035 | } |
2036 | return; | |
2037 | case 'm': | |
2038 | csi_m(vc); | |
2039 | return; | |
2040 | case 'q': /* DECLL - but only 3 leds */ | |
2041 | /* map 0,1,2,3 to 0,1,2,4 */ | |
2042 | if (vc->vc_par[0] < 4) | |
079c9534 | 2043 | vt_set_led_state(vc->vc_num, |
1da177e4 LT |
2044 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
2045 | return; | |
2046 | case 'r': | |
2047 | if (!vc->vc_par[0]) | |
2048 | vc->vc_par[0]++; | |
2049 | if (!vc->vc_par[1]) | |
2050 | vc->vc_par[1] = vc->vc_rows; | |
2051 | /* Minimum allowed region is 2 lines */ | |
2052 | if (vc->vc_par[0] < vc->vc_par[1] && | |
2053 | vc->vc_par[1] <= vc->vc_rows) { | |
2054 | vc->vc_top = vc->vc_par[0] - 1; | |
2055 | vc->vc_bottom = vc->vc_par[1]; | |
2056 | gotoxay(vc, 0, 0); | |
2057 | } | |
2058 | return; | |
2059 | case 's': | |
2060 | save_cur(vc); | |
2061 | return; | |
2062 | case 'u': | |
2063 | restore_cur(vc); | |
2064 | return; | |
2065 | case 'X': | |
2066 | csi_X(vc, vc->vc_par[0]); | |
2067 | return; | |
2068 | case '@': | |
2069 | csi_at(vc, vc->vc_par[0]); | |
2070 | return; | |
2071 | case ']': /* setterm functions */ | |
2072 | setterm_command(vc); | |
2073 | return; | |
2074 | } | |
2075 | return; | |
2076 | case ESpercent: | |
2077 | vc->vc_state = ESnormal; | |
2078 | switch (c) { | |
2079 | case '@': /* defined in ISO 2022 */ | |
2080 | vc->vc_utf = 0; | |
2081 | return; | |
2082 | case 'G': /* prelim official escape code */ | |
2083 | case '8': /* retained for compatibility */ | |
2084 | vc->vc_utf = 1; | |
2085 | return; | |
2086 | } | |
2087 | return; | |
2088 | case ESfunckey: | |
2089 | vc->vc_state = ESnormal; | |
2090 | return; | |
2091 | case EShash: | |
2092 | vc->vc_state = ESnormal; | |
2093 | if (c == '8') { | |
2094 | /* DEC screen alignment test. kludge :-) */ | |
2095 | vc->vc_video_erase_char = | |
2096 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2097 | csi_J(vc, 2); | |
2098 | vc->vc_video_erase_char = | |
2099 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2100 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2101 | } | |
2102 | return; | |
2103 | case ESsetG0: | |
2104 | if (c == '0') | |
2105 | vc->vc_G0_charset = GRAF_MAP; | |
2106 | else if (c == 'B') | |
2107 | vc->vc_G0_charset = LAT1_MAP; | |
2108 | else if (c == 'U') | |
2109 | vc->vc_G0_charset = IBMPC_MAP; | |
2110 | else if (c == 'K') | |
2111 | vc->vc_G0_charset = USER_MAP; | |
2112 | if (vc->vc_charset == 0) | |
2113 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2114 | vc->vc_state = ESnormal; | |
2115 | return; | |
2116 | case ESsetG1: | |
2117 | if (c == '0') | |
2118 | vc->vc_G1_charset = GRAF_MAP; | |
2119 | else if (c == 'B') | |
2120 | vc->vc_G1_charset = LAT1_MAP; | |
2121 | else if (c == 'U') | |
2122 | vc->vc_G1_charset = IBMPC_MAP; | |
2123 | else if (c == 'K') | |
2124 | vc->vc_G1_charset = USER_MAP; | |
2125 | if (vc->vc_charset == 1) | |
2126 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2127 | vc->vc_state = ESnormal; | |
2128 | return; | |
63f3a16d AB |
2129 | case ESosc: |
2130 | return; | |
1da177e4 LT |
2131 | default: |
2132 | vc->vc_state = ESnormal; | |
2133 | } | |
2134 | } | |
2135 | ||
2f1a2ccb | 2136 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2137 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2138 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2139 | */ | |
2140 | struct interval { | |
2141 | uint32_t first; | |
2142 | uint32_t last; | |
2143 | }; | |
2144 | ||
2145 | static int bisearch(uint32_t ucs, const struct interval *table, int max) | |
2146 | { | |
2147 | int min = 0; | |
2148 | int mid; | |
2149 | ||
2150 | if (ucs < table[0].first || ucs > table[max].last) | |
2151 | return 0; | |
2152 | while (max >= min) { | |
2153 | mid = (min + max) / 2; | |
2154 | if (ucs > table[mid].last) | |
2155 | min = mid + 1; | |
2156 | else if (ucs < table[mid].first) | |
2157 | max = mid - 1; | |
2158 | else | |
2159 | return 1; | |
2160 | } | |
2161 | return 0; | |
2162 | } | |
2163 | ||
2164 | static int is_double_width(uint32_t ucs) | |
2165 | { | |
2166 | static const struct interval double_width[] = { | |
2167 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2168 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2169 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2170 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2171 | }; |
0f11541b | 2172 | return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
2f1a2ccb EK |
2173 | } |
2174 | ||
d711ea8f JS |
2175 | static void con_flush(struct vc_data *vc, unsigned long draw_from, |
2176 | unsigned long draw_to, int *draw_x) | |
2177 | { | |
2178 | if (*draw_x < 0) | |
2179 | return; | |
2180 | ||
2181 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, | |
2182 | (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x); | |
2183 | *draw_x = -1; | |
2184 | } | |
2185 | ||
ac751efa | 2186 | /* acquires console_lock */ |
1da177e4 LT |
2187 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
2188 | { | |
1da177e4 LT |
2189 | int c, tc, ok, n = 0, draw_x = -1; |
2190 | unsigned int currcons; | |
2191 | unsigned long draw_from = 0, draw_to = 0; | |
2192 | struct vc_data *vc; | |
2f1a2ccb | 2193 | unsigned char vc_attr; |
0341a4d0 | 2194 | struct vt_notifier_param param; |
2f1a2ccb EK |
2195 | uint8_t rescan; |
2196 | uint8_t inverse; | |
2197 | uint8_t width; | |
1da177e4 | 2198 | u16 himask, charmask; |
1da177e4 LT |
2199 | |
2200 | if (in_interrupt()) | |
2201 | return count; | |
2202 | ||
2203 | might_sleep(); | |
2204 | ||
ac751efa | 2205 | console_lock(); |
1da177e4 LT |
2206 | vc = tty->driver_data; |
2207 | if (vc == NULL) { | |
2208 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); | |
ac751efa | 2209 | console_unlock(); |
1da177e4 LT |
2210 | return 0; |
2211 | } | |
2212 | ||
2213 | currcons = vc->vc_num; | |
2214 | if (!vc_cons_allocated(currcons)) { | |
1ffdda95 MSB |
2215 | /* could this happen? */ |
2216 | pr_warn_once("con_write: tty %d not allocated\n", currcons+1); | |
2217 | console_unlock(); | |
2218 | return 0; | |
1da177e4 | 2219 | } |
1da177e4 | 2220 | |
1da177e4 LT |
2221 | himask = vc->vc_hi_font_mask; |
2222 | charmask = himask ? 0x1ff : 0xff; | |
2223 | ||
2224 | /* undraw cursor first */ | |
6ca8dfd7 | 2225 | if (con_is_fg(vc)) |
1da177e4 LT |
2226 | hide_cursor(vc); |
2227 | ||
0341a4d0 KD |
2228 | param.vc = vc; |
2229 | ||
1da177e4 LT |
2230 | while (!tty->stopped && count) { |
2231 | int orig = *buf; | |
2232 | c = orig; | |
2233 | buf++; | |
2234 | n++; | |
2235 | count--; | |
2f1a2ccb EK |
2236 | rescan = 0; |
2237 | inverse = 0; | |
2238 | width = 1; | |
1da177e4 LT |
2239 | |
2240 | /* Do no translation at all in control states */ | |
2241 | if (vc->vc_state != ESnormal) { | |
2242 | tc = c; | |
d4328b40 | 2243 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2244 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2245 | * vc_utf_count is the number of continuation bytes still | |
2246 | * expected to arrive. | |
2247 | * vc_npar is the number of continuation bytes arrived so | |
2248 | * far | |
2249 | */ | |
d4328b40 | 2250 | rescan_last_byte: |
2f1a2ccb EK |
2251 | if ((c & 0xc0) == 0x80) { |
2252 | /* Continuation byte received */ | |
2253 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2254 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2255 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2256 | vc->vc_npar++; | |
2257 | if (--vc->vc_utf_count) { | |
2258 | /* Still need some bytes */ | |
1da177e4 | 2259 | continue; |
2f1a2ccb EK |
2260 | } |
2261 | /* Got a whole character */ | |
2262 | c = vc->vc_utf_char; | |
2263 | /* Reject overlong sequences */ | |
2264 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2265 | c > utf8_length_changes[vc->vc_npar]) | |
2266 | c = 0xfffd; | |
2267 | } else { | |
2268 | /* Unexpected continuation byte */ | |
2269 | vc->vc_utf_count = 0; | |
2270 | c = 0xfffd; | |
2271 | } | |
1da177e4 | 2272 | } else { |
2f1a2ccb EK |
2273 | /* Single ASCII byte or first byte of a sequence received */ |
2274 | if (vc->vc_utf_count) { | |
2275 | /* Continuation byte expected */ | |
2276 | rescan = 1; | |
2277 | vc->vc_utf_count = 0; | |
2278 | c = 0xfffd; | |
2279 | } else if (c > 0x7f) { | |
2280 | /* First byte of a multibyte sequence received */ | |
2281 | vc->vc_npar = 0; | |
2282 | if ((c & 0xe0) == 0xc0) { | |
2283 | vc->vc_utf_count = 1; | |
2284 | vc->vc_utf_char = (c & 0x1f); | |
2285 | } else if ((c & 0xf0) == 0xe0) { | |
2286 | vc->vc_utf_count = 2; | |
2287 | vc->vc_utf_char = (c & 0x0f); | |
2288 | } else if ((c & 0xf8) == 0xf0) { | |
2289 | vc->vc_utf_count = 3; | |
2290 | vc->vc_utf_char = (c & 0x07); | |
2291 | } else if ((c & 0xfc) == 0xf8) { | |
2292 | vc->vc_utf_count = 4; | |
2293 | vc->vc_utf_char = (c & 0x03); | |
2294 | } else if ((c & 0xfe) == 0xfc) { | |
2295 | vc->vc_utf_count = 5; | |
2296 | vc->vc_utf_char = (c & 0x01); | |
2297 | } else { | |
2298 | /* 254 and 255 are invalid */ | |
2299 | c = 0xfffd; | |
2300 | } | |
2301 | if (vc->vc_utf_count) { | |
2302 | /* Still need some bytes */ | |
2303 | continue; | |
2304 | } | |
2305 | } | |
2306 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2307 | } |
2f1a2ccb EK |
2308 | /* End of UTF-8 decoding. */ |
2309 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2310 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2311 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2312 | c = 0xfffd; | |
2313 | tc = c; | |
d4328b40 | 2314 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2315 | tc = vc_translate(vc, c); |
1da177e4 LT |
2316 | } |
2317 | ||
0341a4d0 KD |
2318 | param.c = tc; |
2319 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2320 | ¶m) == NOTIFY_STOP) | |
2321 | continue; | |
2322 | ||
1da177e4 LT |
2323 | /* If the original code was a control character we |
2324 | * only allow a glyph to be displayed if the code is | |
2325 | * not normally used (such as for cursor movement) or | |
2326 | * if the disp_ctrl mode has been explicitly enabled. | |
2327 | * Certain characters (as given by the CTRL_ALWAYS | |
2328 | * bitmap) are always displayed as control characters, | |
2329 | * as the console would be pretty useless without | |
2330 | * them; to display an arbitrary font position use the | |
2331 | * direct-to-font zone in UTF-8 mode. | |
2332 | */ | |
2333 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2334 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2335 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2336 | && (c != 127 || vc->vc_disp_ctrl) |
2337 | && (c != 128+27); | |
2338 | ||
2339 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2340 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2341 | if (is_double_width(c)) | |
2342 | width = 2; | |
2343 | } | |
1da177e4 LT |
2344 | /* Now try to find out how to display it */ |
2345 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2346 | if (tc & ~charmask) { |
2f1a2ccb EK |
2347 | if (tc == -1 || tc == -2) { |
2348 | continue; /* nothing to display */ | |
2349 | } | |
2350 | /* Glyph not found */ | |
c0b79882 | 2351 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2352 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2353 | This would make absolutely no sense with Unicode in mind, |
2354 | but do this for ASCII characters since a font may lack | |
2355 | Unicode mapping info and we don't want to end up with | |
2356 | having question marks only. */ | |
2f1a2ccb EK |
2357 | tc = c; |
2358 | } else { | |
2359 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2360 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2361 | if (tc < 0) { | |
2362 | inverse = 1; | |
2363 | tc = conv_uni_to_pc(vc, '?'); | |
2364 | if (tc < 0) tc = '?'; | |
2365 | } | |
2366 | } | |
d4328b40 | 2367 | } |
1da177e4 | 2368 | |
2f1a2ccb EK |
2369 | if (!inverse) { |
2370 | vc_attr = vc->vc_attr; | |
1da177e4 | 2371 | } else { |
2f1a2ccb EK |
2372 | /* invert vc_attr */ |
2373 | if (!vc->vc_can_do_color) { | |
2374 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2375 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2376 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2377 | } else { | |
2378 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2379 | } | |
d711ea8f | 2380 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 | 2381 | } |
2f1a2ccb EK |
2382 | |
2383 | while (1) { | |
2384 | if (vc->vc_need_wrap || vc->vc_decim) | |
d711ea8f JS |
2385 | con_flush(vc, draw_from, draw_to, |
2386 | &draw_x); | |
2f1a2ccb EK |
2387 | if (vc->vc_need_wrap) { |
2388 | cr(vc); | |
2389 | lf(vc); | |
2390 | } | |
2391 | if (vc->vc_decim) | |
2392 | insert_char(vc, 1); | |
2393 | scr_writew(himask ? | |
2394 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2395 | (vc_attr << 8) + tc, | |
2396 | (u16 *) vc->vc_pos); | |
6ca8dfd7 | 2397 | if (con_should_update(vc) && draw_x < 0) { |
2f1a2ccb EK |
2398 | draw_x = vc->vc_x; |
2399 | draw_from = vc->vc_pos; | |
2400 | } | |
2401 | if (vc->vc_x == vc->vc_cols - 1) { | |
2402 | vc->vc_need_wrap = vc->vc_decawm; | |
2403 | draw_to = vc->vc_pos + 2; | |
2404 | } else { | |
2405 | vc->vc_x++; | |
2406 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2407 | } |
2f1a2ccb EK |
2408 | |
2409 | if (!--width) break; | |
2410 | ||
2411 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2412 | if (tc < 0) tc = ' '; | |
2413 | } | |
b293d758 | 2414 | notify_write(vc, c); |
2f1a2ccb | 2415 | |
d711ea8f JS |
2416 | if (inverse) |
2417 | con_flush(vc, draw_from, draw_to, &draw_x); | |
1ed8a2b3 | 2418 | |
2f1a2ccb EK |
2419 | if (rescan) { |
2420 | rescan = 0; | |
2421 | inverse = 0; | |
2422 | width = 1; | |
d4328b40 AT |
2423 | c = orig; |
2424 | goto rescan_last_byte; | |
2425 | } | |
1da177e4 LT |
2426 | continue; |
2427 | } | |
d711ea8f | 2428 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 LT |
2429 | do_con_trol(tty, vc, orig); |
2430 | } | |
d711ea8f | 2431 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 | 2432 | console_conditional_schedule(); |
ac751efa | 2433 | console_unlock(); |
b293d758 | 2434 | notify_update(vc); |
1da177e4 | 2435 | return n; |
1da177e4 LT |
2436 | } |
2437 | ||
2438 | /* | |
2439 | * This is the console switching callback. | |
2440 | * | |
2441 | * Doing console switching in a process context allows | |
2442 | * us to do the switches asynchronously (needed when we want | |
2443 | * to switch due to a keyboard interrupt). Synchronization | |
2444 | * with other console code and prevention of re-entrancy is | |
ac751efa | 2445 | * ensured with console_lock. |
1da177e4 | 2446 | */ |
65f27f38 | 2447 | static void console_callback(struct work_struct *ignored) |
1da177e4 | 2448 | { |
ac751efa | 2449 | console_lock(); |
1da177e4 LT |
2450 | |
2451 | if (want_console >= 0) { | |
2452 | if (want_console != fg_console && | |
2453 | vc_cons_allocated(want_console)) { | |
2454 | hide_cursor(vc_cons[fg_console].d); | |
2455 | change_console(vc_cons[want_console].d); | |
2456 | /* we only changed when the console had already | |
2457 | been allocated - a new console is not created | |
2458 | in an interrupt routine */ | |
2459 | } | |
2460 | want_console = -1; | |
2461 | } | |
2462 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2463 | do_poke_blanked_console = 0; | |
2464 | poke_blanked_console(); | |
2465 | } | |
2466 | if (scrollback_delta) { | |
2467 | struct vc_data *vc = vc_cons[fg_console].d; | |
2468 | clear_selection(); | |
97293de9 | 2469 | if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta) |
1da177e4 LT |
2470 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); |
2471 | scrollback_delta = 0; | |
2472 | } | |
2473 | if (blank_timer_expired) { | |
2474 | do_blank_screen(0); | |
2475 | blank_timer_expired = 0; | |
2476 | } | |
b293d758 | 2477 | notify_update(vc_cons[fg_console].d); |
1da177e4 | 2478 | |
ac751efa | 2479 | console_unlock(); |
1da177e4 LT |
2480 | } |
2481 | ||
b257bc05 | 2482 | int set_console(int nr) |
1da177e4 | 2483 | { |
b257bc05 AJ |
2484 | struct vc_data *vc = vc_cons[fg_console].d; |
2485 | ||
2486 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2487 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2488 | ||
2489 | /* | |
2490 | * Console switch will fail in console_callback() or | |
2491 | * change_console() so there is no point scheduling | |
2492 | * the callback | |
2493 | * | |
2494 | * Existing set_console() users don't check the return | |
2495 | * value so this shouldn't break anything | |
2496 | */ | |
2497 | return -EINVAL; | |
2498 | } | |
2499 | ||
1da177e4 LT |
2500 | want_console = nr; |
2501 | schedule_console_callback(); | |
b257bc05 AJ |
2502 | |
2503 | return 0; | |
1da177e4 LT |
2504 | } |
2505 | ||
2506 | struct tty_driver *console_driver; | |
2507 | ||
2508 | #ifdef CONFIG_VT_CONSOLE | |
2509 | ||
5ada918b BW |
2510 | /** |
2511 | * vt_kmsg_redirect() - Sets/gets the kernel message console | |
2512 | * @new: The new virtual terminal number or -1 if the console should stay | |
2513 | * unchanged | |
2514 | * | |
2515 | * By default, the kernel messages are always printed on the current virtual | |
2516 | * console. However, the user may modify that default with the | |
2517 | * TIOCL_SETKMSGREDIRECT ioctl call. | |
2518 | * | |
2519 | * This function sets the kernel message console to be @new. It returns the old | |
2520 | * virtual console number. The virtual terminal number 0 (both as parameter and | |
2521 | * return value) means no redirection (i.e. always printed on the currently | |
2522 | * active console). | |
2523 | * | |
2524 | * The parameter -1 means that only the current console is returned, but the | |
2525 | * value is not modified. You may use the macro vt_get_kmsg_redirect() in that | |
2526 | * case to make the code more understandable. | |
2527 | * | |
2528 | * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores | |
2529 | * the parameter and always returns 0. | |
2530 | */ | |
2531 | int vt_kmsg_redirect(int new) | |
2532 | { | |
2533 | static int kmsg_con; | |
2534 | ||
2535 | if (new != -1) | |
2536 | return xchg(&kmsg_con, new); | |
2537 | else | |
2538 | return kmsg_con; | |
2539 | } | |
2540 | ||
1da177e4 LT |
2541 | /* |
2542 | * Console on virtual terminal | |
2543 | * | |
2544 | * The console must be locked when we get here. | |
2545 | */ | |
2546 | ||
2547 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2548 | { | |
2549 | struct vc_data *vc = vc_cons[fg_console].d; | |
2550 | unsigned char c; | |
b0940003 | 2551 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 LT |
2552 | const ushort *start; |
2553 | ushort cnt = 0; | |
2554 | ushort myx; | |
5ada918b | 2555 | int kmsg_console; |
1da177e4 LT |
2556 | |
2557 | /* console busy or not yet initialized */ | |
b0940003 NP |
2558 | if (!printable) |
2559 | return; | |
2560 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2561 | return; |
2562 | ||
5ada918b BW |
2563 | kmsg_console = vt_get_kmsg_redirect(); |
2564 | if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) | |
2565 | vc = vc_cons[kmsg_console - 1].d; | |
1da177e4 LT |
2566 | |
2567 | /* read `x' only after setting currcons properly (otherwise | |
2568 | the `x' macro will read the x of the foreground console). */ | |
2569 | myx = vc->vc_x; | |
2570 | ||
2571 | if (!vc_cons_allocated(fg_console)) { | |
2572 | /* impossible */ | |
2573 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2574 | goto quit; | |
2575 | } | |
2576 | ||
8fd4bd22 | 2577 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
1da177e4 LT |
2578 | goto quit; |
2579 | ||
2580 | /* undraw cursor first */ | |
6ca8dfd7 | 2581 | if (con_is_fg(vc)) |
1da177e4 LT |
2582 | hide_cursor(vc); |
2583 | ||
2584 | start = (ushort *)vc->vc_pos; | |
2585 | ||
2586 | /* Contrived structure to try to emulate original need_wrap behaviour | |
2587 | * Problems caused when we have need_wrap set on '\n' character */ | |
2588 | while (count--) { | |
2589 | c = *b++; | |
2590 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
2591 | if (cnt > 0) { | |
6ca8dfd7 | 2592 | if (con_is_visible(vc)) |
1da177e4 LT |
2593 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2594 | vc->vc_x += cnt; | |
2595 | if (vc->vc_need_wrap) | |
2596 | vc->vc_x--; | |
2597 | cnt = 0; | |
2598 | } | |
2599 | if (c == 8) { /* backspace */ | |
2600 | bs(vc); | |
2601 | start = (ushort *)vc->vc_pos; | |
2602 | myx = vc->vc_x; | |
2603 | continue; | |
2604 | } | |
2605 | if (c != 13) | |
2606 | lf(vc); | |
2607 | cr(vc); | |
2608 | start = (ushort *)vc->vc_pos; | |
2609 | myx = vc->vc_x; | |
2610 | if (c == 10 || c == 13) | |
2611 | continue; | |
2612 | } | |
2613 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); | |
b293d758 | 2614 | notify_write(vc, c); |
1da177e4 LT |
2615 | cnt++; |
2616 | if (myx == vc->vc_cols - 1) { | |
2617 | vc->vc_need_wrap = 1; | |
2618 | continue; | |
2619 | } | |
2620 | vc->vc_pos += 2; | |
2621 | myx++; | |
2622 | } | |
2623 | if (cnt > 0) { | |
6ca8dfd7 | 2624 | if (con_is_visible(vc)) |
1da177e4 LT |
2625 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2626 | vc->vc_x += cnt; | |
2627 | if (vc->vc_x == vc->vc_cols) { | |
2628 | vc->vc_x--; | |
2629 | vc->vc_need_wrap = 1; | |
2630 | } | |
2631 | } | |
2632 | set_cursor(vc); | |
b293d758 | 2633 | notify_update(vc); |
1da177e4 LT |
2634 | |
2635 | quit: | |
b0940003 | 2636 | spin_unlock(&printing_lock); |
1da177e4 LT |
2637 | } |
2638 | ||
2639 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
2640 | { | |
2641 | *index = c->index ? c->index-1 : fg_console; | |
2642 | return console_driver; | |
2643 | } | |
2644 | ||
2645 | static struct console vt_console_driver = { | |
2646 | .name = "tty", | |
2647 | .write = vt_console_print, | |
2648 | .device = vt_console_device, | |
2649 | .unblank = unblank_screen, | |
2650 | .flags = CON_PRINTBUFFER, | |
2651 | .index = -1, | |
2652 | }; | |
2653 | #endif | |
2654 | ||
2655 | /* | |
2656 | * Handling of Linux-specific VC ioctls | |
2657 | */ | |
2658 | ||
2659 | /* | |
ac751efa | 2660 | * Generally a bit racy with respect to console_lock();. |
1da177e4 LT |
2661 | * |
2662 | * There are some functions which don't need it. | |
2663 | * | |
2664 | * There are some functions which can sleep for arbitrary periods | |
2665 | * (paste_selection) but we don't need the lock there anyway. | |
2666 | * | |
2667 | * set_selection has locking, and definitely needs it | |
2668 | */ | |
2669 | ||
2670 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
2671 | { | |
2672 | char type, data; | |
2673 | char __user *p = (char __user *)arg; | |
2674 | int lines; | |
2675 | int ret; | |
2676 | ||
1da177e4 LT |
2677 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
2678 | return -EPERM; | |
2679 | if (get_user(type, p)) | |
2680 | return -EFAULT; | |
2681 | ret = 0; | |
04f378b1 | 2682 | |
1da177e4 LT |
2683 | switch (type) |
2684 | { | |
2685 | case TIOCL_SETSEL: | |
ac751efa | 2686 | console_lock(); |
1da177e4 | 2687 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); |
ac751efa | 2688 | console_unlock(); |
1da177e4 LT |
2689 | break; |
2690 | case TIOCL_PASTESEL: | |
2691 | ret = paste_selection(tty); | |
2692 | break; | |
2693 | case TIOCL_UNBLANKSCREEN: | |
ac751efa | 2694 | console_lock(); |
1da177e4 | 2695 | unblank_screen(); |
ac751efa | 2696 | console_unlock(); |
1da177e4 LT |
2697 | break; |
2698 | case TIOCL_SELLOADLUT: | |
5289475d | 2699 | console_lock(); |
1da177e4 | 2700 | ret = sel_loadlut(p); |
5289475d | 2701 | console_unlock(); |
1da177e4 LT |
2702 | break; |
2703 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 2704 | |
1da177e4 LT |
2705 | /* |
2706 | * Make it possible to react to Shift+Mousebutton. | |
2707 | * Note that 'shift_state' is an undocumented | |
2708 | * kernel-internal variable; programs not closely | |
2709 | * related to the kernel should not use this. | |
2710 | */ | |
079c9534 | 2711 | data = vt_get_shift_state(); |
6987dc8a | 2712 | ret = put_user(data, p); |
1da177e4 LT |
2713 | break; |
2714 | case TIOCL_GETMOUSEREPORTING: | |
20f62579 | 2715 | console_lock(); /* May be overkill */ |
1da177e4 | 2716 | data = mouse_reporting(); |
20f62579 | 2717 | console_unlock(); |
6987dc8a | 2718 | ret = put_user(data, p); |
1da177e4 LT |
2719 | break; |
2720 | case TIOCL_SETVESABLANK: | |
20f62579 | 2721 | console_lock(); |
403aac96 | 2722 | ret = set_vesa_blanking(p); |
20f62579 | 2723 | console_unlock(); |
1da177e4 | 2724 | break; |
0ca07731 | 2725 | case TIOCL_GETKMSGREDIRECT: |
5ada918b | 2726 | data = vt_get_kmsg_redirect(); |
6987dc8a | 2727 | ret = put_user(data, p); |
0ca07731 | 2728 | break; |
1da177e4 LT |
2729 | case TIOCL_SETKMSGREDIRECT: |
2730 | if (!capable(CAP_SYS_ADMIN)) { | |
2731 | ret = -EPERM; | |
2732 | } else { | |
2733 | if (get_user(data, p+1)) | |
2734 | ret = -EFAULT; | |
2735 | else | |
5ada918b | 2736 | vt_kmsg_redirect(data); |
1da177e4 LT |
2737 | } |
2738 | break; | |
2739 | case TIOCL_GETFGCONSOLE: | |
20f62579 AC |
2740 | /* No locking needed as this is a transiently |
2741 | correct return anyway if the caller hasn't | |
2742 | disabled switching */ | |
1da177e4 LT |
2743 | ret = fg_console; |
2744 | break; | |
2745 | case TIOCL_SCROLLCONSOLE: | |
2746 | if (get_user(lines, (s32 __user *)(p+4))) { | |
2747 | ret = -EFAULT; | |
2748 | } else { | |
20f62579 AC |
2749 | /* Need the console lock here. Note that lots |
2750 | of other calls need fixing before the lock | |
2751 | is actually useful ! */ | |
2752 | console_lock(); | |
1da177e4 | 2753 | scrollfront(vc_cons[fg_console].d, lines); |
20f62579 | 2754 | console_unlock(); |
1da177e4 LT |
2755 | ret = 0; |
2756 | } | |
2757 | break; | |
2758 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
ac751efa | 2759 | console_lock(); |
1da177e4 LT |
2760 | ignore_poke = 1; |
2761 | do_blank_screen(0); | |
ac751efa | 2762 | console_unlock(); |
1da177e4 LT |
2763 | break; |
2764 | case TIOCL_BLANKEDSCREEN: | |
2765 | ret = console_blanked; | |
2766 | break; | |
2767 | default: | |
2768 | ret = -EINVAL; | |
2769 | break; | |
2770 | } | |
2771 | return ret; | |
2772 | } | |
2773 | ||
2774 | /* | |
2775 | * /dev/ttyN handling | |
2776 | */ | |
2777 | ||
2778 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2779 | { | |
2780 | int retval; | |
2781 | ||
2782 | retval = do_con_write(tty, buf, count); | |
2783 | con_flush_chars(tty); | |
2784 | ||
2785 | return retval; | |
2786 | } | |
2787 | ||
5d19f546 | 2788 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
2789 | { |
2790 | if (in_interrupt()) | |
5d19f546 AC |
2791 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
2792 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
2793 | } |
2794 | ||
2795 | static int con_write_room(struct tty_struct *tty) | |
2796 | { | |
2797 | if (tty->stopped) | |
2798 | return 0; | |
a88a69c9 | 2799 | return 32768; /* No limit, really; we're not buffering */ |
1da177e4 LT |
2800 | } |
2801 | ||
2802 | static int con_chars_in_buffer(struct tty_struct *tty) | |
2803 | { | |
2804 | return 0; /* we're not buffering */ | |
2805 | } | |
2806 | ||
2807 | /* | |
2808 | * con_throttle and con_unthrottle are only used for | |
2809 | * paste_selection(), which has to stuff in a large number of | |
2810 | * characters... | |
2811 | */ | |
2812 | static void con_throttle(struct tty_struct *tty) | |
2813 | { | |
2814 | } | |
2815 | ||
2816 | static void con_unthrottle(struct tty_struct *tty) | |
2817 | { | |
2818 | struct vc_data *vc = tty->driver_data; | |
2819 | ||
2820 | wake_up_interruptible(&vc->paste_wait); | |
2821 | } | |
2822 | ||
2823 | /* | |
2824 | * Turn the Scroll-Lock LED on when the tty is stopped | |
2825 | */ | |
2826 | static void con_stop(struct tty_struct *tty) | |
2827 | { | |
2828 | int console_num; | |
2829 | if (!tty) | |
2830 | return; | |
2831 | console_num = tty->index; | |
2832 | if (!vc_cons_allocated(console_num)) | |
2833 | return; | |
079c9534 | 2834 | vt_kbd_con_stop(console_num); |
1da177e4 LT |
2835 | } |
2836 | ||
2837 | /* | |
2838 | * Turn the Scroll-Lock LED off when the console is started | |
2839 | */ | |
2840 | static void con_start(struct tty_struct *tty) | |
2841 | { | |
2842 | int console_num; | |
2843 | if (!tty) | |
2844 | return; | |
2845 | console_num = tty->index; | |
2846 | if (!vc_cons_allocated(console_num)) | |
2847 | return; | |
079c9534 | 2848 | vt_kbd_con_start(console_num); |
1da177e4 LT |
2849 | } |
2850 | ||
2851 | static void con_flush_chars(struct tty_struct *tty) | |
2852 | { | |
2853 | struct vc_data *vc; | |
2854 | ||
2855 | if (in_interrupt()) /* from flush_to_ldisc */ | |
2856 | return; | |
2857 | ||
2858 | /* if we race with con_close(), vt may be null */ | |
ac751efa | 2859 | console_lock(); |
1da177e4 LT |
2860 | vc = tty->driver_data; |
2861 | if (vc) | |
2862 | set_cursor(vc); | |
ac751efa | 2863 | console_unlock(); |
1da177e4 LT |
2864 | } |
2865 | ||
2866 | /* | |
2867 | * Allocate the console screen memory. | |
2868 | */ | |
bc1e99d9 | 2869 | static int con_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 LT |
2870 | { |
2871 | unsigned int currcons = tty->index; | |
bc1e99d9 JS |
2872 | struct vc_data *vc; |
2873 | int ret; | |
1da177e4 | 2874 | |
ac751efa | 2875 | console_lock(); |
bc1e99d9 JS |
2876 | ret = vc_allocate(currcons); |
2877 | if (ret) | |
2878 | goto unlock; | |
feebed65 | 2879 | |
bc1e99d9 | 2880 | vc = vc_cons[currcons].d; |
1da177e4 | 2881 | |
bc1e99d9 JS |
2882 | /* Still being freed */ |
2883 | if (vc->port.tty) { | |
2884 | ret = -ERESTARTSYS; | |
2885 | goto unlock; | |
2886 | } | |
2887 | ||
2888 | ret = tty_port_install(&vc->port, driver, tty); | |
2889 | if (ret) | |
2890 | goto unlock; | |
2891 | ||
2892 | tty->driver_data = vc; | |
2893 | vc->port.tty = tty; | |
2894 | ||
2895 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
2896 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
2897 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
1da177e4 | 2898 | } |
bc1e99d9 | 2899 | if (vc->vc_utf) |
adc8d746 | 2900 | tty->termios.c_iflag |= IUTF8; |
bc1e99d9 | 2901 | else |
adc8d746 | 2902 | tty->termios.c_iflag &= ~IUTF8; |
bc1e99d9 | 2903 | unlock: |
ac751efa | 2904 | console_unlock(); |
1da177e4 LT |
2905 | return ret; |
2906 | } | |
2907 | ||
bc1e99d9 JS |
2908 | static int con_open(struct tty_struct *tty, struct file *filp) |
2909 | { | |
2910 | /* everything done in install */ | |
2911 | return 0; | |
2912 | } | |
2913 | ||
2914 | ||
1da177e4 LT |
2915 | static void con_close(struct tty_struct *tty, struct file *filp) |
2916 | { | |
feebed65 AC |
2917 | /* Nothing to do - we defer to shutdown */ |
2918 | } | |
1da177e4 | 2919 | |
feebed65 AC |
2920 | static void con_shutdown(struct tty_struct *tty) |
2921 | { | |
2922 | struct vc_data *vc = tty->driver_data; | |
2923 | BUG_ON(vc == NULL); | |
ac751efa | 2924 | console_lock(); |
8ce73264 | 2925 | vc->port.tty = NULL; |
ac751efa | 2926 | console_unlock(); |
1da177e4 LT |
2927 | } |
2928 | ||
3855ae1c | 2929 | static int default_color = 7; /* white */ |
fa6ce9ab JE |
2930 | static int default_italic_color = 2; // green (ASCII) |
2931 | static int default_underline_color = 3; // cyan (ASCII) | |
3855ae1c | 2932 | module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); |
fa6ce9ab JE |
2933 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); |
2934 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
2935 | ||
1da177e4 LT |
2936 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2937 | unsigned int cols, int do_clear) | |
2938 | { | |
2939 | int j, k ; | |
2940 | ||
2941 | vc->vc_cols = cols; | |
2942 | vc->vc_rows = rows; | |
2943 | vc->vc_size_row = cols << 1; | |
2944 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
2945 | ||
2946 | set_origin(vc); | |
2947 | vc->vc_pos = vc->vc_origin; | |
2948 | reset_vc(vc); | |
2949 | for (j=k=0; j<16; j++) { | |
2950 | vc->vc_palette[k++] = default_red[j] ; | |
2951 | vc->vc_palette[k++] = default_grn[j] ; | |
2952 | vc->vc_palette[k++] = default_blu[j] ; | |
2953 | } | |
3855ae1c | 2954 | vc->vc_def_color = default_color; |
fa6ce9ab JE |
2955 | vc->vc_ulcolor = default_underline_color; |
2956 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
2957 | vc->vc_halfcolor = 0x08; /* grey */ |
2958 | init_waitqueue_head(&vc->paste_wait); | |
2959 | reset_terminal(vc, do_clear); | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * This routine initializes console interrupts, and does nothing | |
2964 | * else. If you want the screen to clear, call tty_write with | |
2965 | * the appropriate escape-sequence. | |
2966 | */ | |
2967 | ||
2968 | static int __init con_init(void) | |
2969 | { | |
2970 | const char *display_desc = NULL; | |
2971 | struct vc_data *vc; | |
3e795de7 | 2972 | unsigned int currcons = 0, i; |
1da177e4 | 2973 | |
ac751efa | 2974 | console_lock(); |
1da177e4 LT |
2975 | |
2976 | if (conswitchp) | |
2977 | display_desc = conswitchp->con_startup(); | |
2978 | if (!display_desc) { | |
2979 | fg_console = 0; | |
ac751efa | 2980 | console_unlock(); |
1da177e4 LT |
2981 | return 0; |
2982 | } | |
2983 | ||
3e795de7 AD |
2984 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
2985 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
2986 | ||
2987 | if (con_driver->con == NULL) { | |
2988 | con_driver->con = conswitchp; | |
2989 | con_driver->desc = display_desc; | |
2990 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
2991 | con_driver->first = 0; | |
2992 | con_driver->last = MAX_NR_CONSOLES - 1; | |
2993 | break; | |
2994 | } | |
2995 | } | |
2996 | ||
2997 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
2998 | con_driver_map[i] = conswitchp; | |
2999 | ||
1da177e4 LT |
3000 | if (blankinterval) { |
3001 | blank_state = blank_normal_wait; | |
f324edc8 | 3002 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3003 | } |
3004 | ||
1da177e4 | 3005 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
a5f4f52e | 3006 | vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
7f1f86a0 | 3007 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
ff917ba4 | 3008 | tty_port_init(&vc->port); |
1da177e4 | 3009 | visual_init(vc, currcons, 1); |
a5f4f52e | 3010 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
1da177e4 LT |
3011 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
3012 | currcons || !vc->vc_sw->con_save_screen); | |
3013 | } | |
3014 | currcons = fg_console = 0; | |
3015 | master_display_fg = vc = vc_cons[currcons].d; | |
3016 | set_origin(vc); | |
3017 | save_screen(vc); | |
3018 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
3019 | csi_J(vc, 0); | |
3020 | update_screen(vc); | |
5da527aa | 3021 | pr_info("Console: %s %s %dx%d\n", |
1da177e4 LT |
3022 | vc->vc_can_do_color ? "colour" : "mono", |
3023 | display_desc, vc->vc_cols, vc->vc_rows); | |
3024 | printable = 1; | |
1da177e4 | 3025 | |
ac751efa | 3026 | console_unlock(); |
1da177e4 LT |
3027 | |
3028 | #ifdef CONFIG_VT_CONSOLE | |
3029 | register_console(&vt_console_driver); | |
3030 | #endif | |
3031 | return 0; | |
3032 | } | |
3033 | console_initcall(con_init); | |
3034 | ||
b68e31d0 | 3035 | static const struct tty_operations con_ops = { |
bc1e99d9 | 3036 | .install = con_install, |
1da177e4 LT |
3037 | .open = con_open, |
3038 | .close = con_close, | |
3039 | .write = con_write, | |
3040 | .write_room = con_write_room, | |
3041 | .put_char = con_put_char, | |
3042 | .flush_chars = con_flush_chars, | |
3043 | .chars_in_buffer = con_chars_in_buffer, | |
3044 | .ioctl = vt_ioctl, | |
e9216651 AB |
3045 | #ifdef CONFIG_COMPAT |
3046 | .compat_ioctl = vt_compat_ioctl, | |
3047 | #endif | |
1da177e4 LT |
3048 | .stop = con_stop, |
3049 | .start = con_start, | |
3050 | .throttle = con_throttle, | |
3051 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 3052 | .resize = vt_resize, |
feebed65 | 3053 | .shutdown = con_shutdown |
1da177e4 LT |
3054 | }; |
3055 | ||
d81ed103 AC |
3056 | static struct cdev vc0_cdev; |
3057 | ||
fbc92a34 KS |
3058 | static ssize_t show_tty_active(struct device *dev, |
3059 | struct device_attribute *attr, char *buf) | |
3060 | { | |
3061 | return sprintf(buf, "tty%d\n", fg_console + 1); | |
3062 | } | |
3063 | static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); | |
3064 | ||
1083a7be TI |
3065 | static struct attribute *vt_dev_attrs[] = { |
3066 | &dev_attr_active.attr, | |
3067 | NULL | |
3068 | }; | |
3069 | ||
3070 | ATTRIBUTE_GROUPS(vt_dev); | |
3071 | ||
d81ed103 | 3072 | int __init vty_init(const struct file_operations *console_fops) |
1da177e4 | 3073 | { |
d81ed103 AC |
3074 | cdev_init(&vc0_cdev, console_fops); |
3075 | if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || | |
3076 | register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) | |
3077 | panic("Couldn't register /dev/tty0 driver\n"); | |
1083a7be TI |
3078 | tty0dev = device_create_with_groups(tty_class, NULL, |
3079 | MKDEV(TTY_MAJOR, 0), NULL, | |
3080 | vt_dev_groups, "tty0"); | |
fbc92a34 KS |
3081 | if (IS_ERR(tty0dev)) |
3082 | tty0dev = NULL; | |
d81ed103 | 3083 | |
1da177e4 LT |
3084 | vcs_init(); |
3085 | ||
3086 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
3087 | if (!console_driver) | |
3088 | panic("Couldn't allocate console driver\n"); | |
2f16669d | 3089 | |
1da177e4 LT |
3090 | console_driver->name = "tty"; |
3091 | console_driver->name_base = 1; | |
3092 | console_driver->major = TTY_MAJOR; | |
3093 | console_driver->minor_start = 1; | |
3094 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
3095 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
3096 | if (default_utf8) |
3097 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
3098 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
3099 | tty_set_operations(console_driver, &con_ops); | |
3100 | if (tty_register_driver(console_driver)) | |
3101 | panic("Couldn't register console driver\n"); | |
1da177e4 LT |
3102 | kbd_init(); |
3103 | console_map_init(); | |
1da177e4 LT |
3104 | #ifdef CONFIG_MDA_CONSOLE |
3105 | mda_console_init(); | |
3106 | #endif | |
3107 | return 0; | |
3108 | } | |
3109 | ||
3110 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
3111 | |
3112 | static struct class *vtconsole_class; | |
3113 | ||
50e244cc | 3114 | static int do_bind_con_driver(const struct consw *csw, int first, int last, |
b7269dd2 | 3115 | int deflt) |
1da177e4 | 3116 | { |
3e795de7 AD |
3117 | struct module *owner = csw->owner; |
3118 | const char *desc = NULL; | |
3119 | struct con_driver *con_driver; | |
3120 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 3121 | |
1da177e4 LT |
3122 | if (!try_module_get(owner)) |
3123 | return -ENODEV; | |
3124 | ||
50e244cc | 3125 | WARN_CONSOLE_UNLOCKED(); |
1c8ce271 | 3126 | |
3e795de7 AD |
3127 | /* check if driver is registered */ |
3128 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3129 | con_driver = ®istered_con_driver[i]; | |
3130 | ||
3131 | if (con_driver->con == csw) { | |
3132 | desc = con_driver->desc; | |
3133 | retval = 0; | |
3134 | break; | |
3135 | } | |
3136 | } | |
3137 | ||
3138 | if (retval) | |
3139 | goto err; | |
3140 | ||
3141 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3142 | csw->con_startup(); | |
3143 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3144 | } |
1c8ce271 | 3145 | |
1da177e4 LT |
3146 | if (deflt) { |
3147 | if (conswitchp) | |
3148 | module_put(conswitchp->owner); | |
1c8ce271 | 3149 | |
1da177e4 LT |
3150 | __module_get(owner); |
3151 | conswitchp = csw; | |
3152 | } | |
3153 | ||
3e795de7 AD |
3154 | first = max(first, con_driver->first); |
3155 | last = min(last, con_driver->last); | |
3156 | ||
1da177e4 LT |
3157 | for (i = first; i <= last; i++) { |
3158 | int old_was_color; | |
3159 | struct vc_data *vc = vc_cons[i].d; | |
3160 | ||
3161 | if (con_driver_map[i]) | |
3162 | module_put(con_driver_map[i]->owner); | |
3163 | __module_get(owner); | |
3164 | con_driver_map[i] = csw; | |
3165 | ||
3166 | if (!vc || !vc->vc_sw) | |
3167 | continue; | |
3168 | ||
3169 | j = i; | |
1c8ce271 | 3170 | |
6ca8dfd7 | 3171 | if (con_is_visible(vc)) { |
4ee1acce | 3172 | k = i; |
1da177e4 | 3173 | save_screen(vc); |
4ee1acce DH |
3174 | } |
3175 | ||
1da177e4 LT |
3176 | old_was_color = vc->vc_can_do_color; |
3177 | vc->vc_sw->con_deinit(vc); | |
9fc2b2d0 | 3178 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
1da177e4 | 3179 | visual_init(vc, i, 0); |
1c8ce271 | 3180 | set_origin(vc); |
1da177e4 LT |
3181 | update_attr(vc); |
3182 | ||
3183 | /* If the console changed between mono <-> color, then | |
3184 | * the attributes in the screenbuf will be wrong. The | |
3185 | * following resets all attributes to something sane. | |
3186 | */ | |
3187 | if (old_was_color != vc->vc_can_do_color) | |
3188 | clear_buffer_attributes(vc); | |
1da177e4 | 3189 | } |
4ee1acce | 3190 | |
1ffdda95 | 3191 | pr_info("Console: switching "); |
1da177e4 | 3192 | if (!deflt) |
4bcc595c | 3193 | printk(KERN_CONT "consoles %d-%d ", first+1, last+1); |
4ee1acce DH |
3194 | if (j >= 0) { |
3195 | struct vc_data *vc = vc_cons[j].d; | |
3196 | ||
4bcc595c | 3197 | printk(KERN_CONT "to %s %s %dx%d\n", |
4ee1acce DH |
3198 | vc->vc_can_do_color ? "colour" : "mono", |
3199 | desc, vc->vc_cols, vc->vc_rows); | |
3200 | ||
3201 | if (k >= 0) { | |
3202 | vc = vc_cons[k].d; | |
3203 | update_screen(vc); | |
3204 | } | |
3205 | } else | |
4bcc595c | 3206 | printk(KERN_CONT "to %s\n", desc); |
1da177e4 | 3207 | |
3e795de7 AD |
3208 | retval = 0; |
3209 | err: | |
1da177e4 | 3210 | module_put(owner); |
3e795de7 AD |
3211 | return retval; |
3212 | }; | |
1da177e4 | 3213 | |
50e244cc | 3214 | |
13ae6645 | 3215 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
e93a9a86 TI |
3216 | /* unlocked version of unbind_con_driver() */ |
3217 | int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) | |
1da177e4 | 3218 | { |
3e795de7 AD |
3219 | struct module *owner = csw->owner; |
3220 | const struct consw *defcsw = NULL; | |
3221 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3222 | int i, retval = -ENODEV; | |
1da177e4 | 3223 | |
3e795de7 AD |
3224 | if (!try_module_get(owner)) |
3225 | return -ENODEV; | |
3226 | ||
e93a9a86 | 3227 | WARN_CONSOLE_UNLOCKED(); |
3e795de7 AD |
3228 | |
3229 | /* check if driver is registered and if it is unbindable */ | |
3230 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3231 | con_driver = ®istered_con_driver[i]; | |
3232 | ||
3233 | if (con_driver->con == csw && | |
6db4063c | 3234 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3235 | retval = 0; |
3236 | break; | |
3237 | } | |
3238 | } | |
3239 | ||
e93a9a86 | 3240 | if (retval) |
3e795de7 | 3241 | goto err; |
3e795de7 | 3242 | |
6db4063c AD |
3243 | retval = -ENODEV; |
3244 | ||
3e795de7 AD |
3245 | /* check if backup driver exists */ |
3246 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3247 | con_back = ®istered_con_driver[i]; | |
3248 | ||
249f7b3e | 3249 | if (con_back->con && con_back->con != csw) { |
3e795de7 AD |
3250 | defcsw = con_back->con; |
3251 | retval = 0; | |
3252 | break; | |
3253 | } | |
3254 | } | |
3255 | ||
e93a9a86 | 3256 | if (retval) |
3e795de7 | 3257 | goto err; |
3e795de7 | 3258 | |
e93a9a86 | 3259 | if (!con_is_bound(csw)) |
3e795de7 | 3260 | goto err; |
3e795de7 AD |
3261 | |
3262 | first = max(first, con_driver->first); | |
3263 | last = min(last, con_driver->last); | |
3264 | ||
3265 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3266 | if (con_driver_map[i] == csw) { |
3267 | module_put(csw->owner); | |
3268 | con_driver_map[i] = NULL; | |
3269 | } | |
3e795de7 AD |
3270 | } |
3271 | ||
3272 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3273 | const struct consw *defconsw = conswitchp; |
3274 | ||
3e795de7 AD |
3275 | defcsw->con_startup(); |
3276 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3277 | /* |
3278 | * vgacon may change the default driver to point | |
3279 | * to dummycon, we restore it here... | |
3280 | */ | |
3281 | conswitchp = defconsw; | |
3e795de7 AD |
3282 | } |
3283 | ||
3284 | if (!con_is_bound(csw)) | |
3285 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3286 | ||
6db4063c | 3287 | /* ignore return value, binding should not fail */ |
50e244cc | 3288 | do_bind_con_driver(defcsw, first, last, deflt); |
3e795de7 AD |
3289 | err: |
3290 | module_put(owner); | |
3291 | return retval; | |
3292 | ||
3293 | } | |
e93a9a86 | 3294 | EXPORT_SYMBOL_GPL(do_unbind_con_driver); |
3e795de7 | 3295 | |
6db4063c AD |
3296 | static int vt_bind(struct con_driver *con) |
3297 | { | |
3298 | const struct consw *defcsw = NULL, *csw = NULL; | |
3299 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3300 | ||
77232f79 | 3301 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3302 | goto err; |
3303 | ||
3304 | csw = con->con; | |
3305 | ||
3306 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3307 | struct con_driver *con = ®istered_con_driver[i]; | |
3308 | ||
3309 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3310 | defcsw = con->con; | |
3311 | break; | |
3312 | } | |
3313 | } | |
3314 | ||
3315 | if (!defcsw) | |
3316 | goto err; | |
3317 | ||
3318 | while (more) { | |
3319 | more = 0; | |
3320 | ||
3321 | for (i = con->first; i <= con->last; i++) { | |
3322 | if (con_driver_map[i] == defcsw) { | |
3323 | if (first == -1) | |
3324 | first = i; | |
3325 | last = i; | |
3326 | more = 1; | |
3327 | } else if (first != -1) | |
3328 | break; | |
3329 | } | |
3330 | ||
3331 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3332 | deflt = 1; | |
3333 | ||
4c215fe8 | 3334 | if (first != -1) |
c62a1e57 | 3335 | do_bind_con_driver(csw, first, last, deflt); |
6db4063c AD |
3336 | |
3337 | first = -1; | |
3338 | last = -1; | |
3339 | deflt = 0; | |
3340 | } | |
3341 | ||
3342 | err: | |
3343 | return 0; | |
3344 | } | |
3345 | ||
3346 | static int vt_unbind(struct con_driver *con) | |
3347 | { | |
3348 | const struct consw *csw = NULL; | |
3349 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
f418f2ec | 3350 | int ret; |
6db4063c | 3351 | |
77232f79 | 3352 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3353 | goto err; |
3354 | ||
3355 | csw = con->con; | |
3356 | ||
3357 | while (more) { | |
3358 | more = 0; | |
3359 | ||
3360 | for (i = con->first; i <= con->last; i++) { | |
3361 | if (con_driver_map[i] == csw) { | |
3362 | if (first == -1) | |
3363 | first = i; | |
3364 | last = i; | |
3365 | more = 1; | |
3366 | } else if (first != -1) | |
3367 | break; | |
3368 | } | |
3369 | ||
3370 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3371 | deflt = 1; | |
3372 | ||
618f2b90 | 3373 | if (first != -1) { |
f418f2ec | 3374 | ret = do_unbind_con_driver(csw, first, last, deflt); |
f418f2ec DV |
3375 | if (ret != 0) |
3376 | return ret; | |
618f2b90 | 3377 | } |
6db4063c AD |
3378 | |
3379 | first = -1; | |
3380 | last = -1; | |
3381 | deflt = 0; | |
3382 | } | |
3383 | ||
3384 | err: | |
3385 | return 0; | |
3386 | } | |
13ae6645 AD |
3387 | #else |
3388 | static inline int vt_bind(struct con_driver *con) | |
3389 | { | |
3390 | return 0; | |
3391 | } | |
3392 | static inline int vt_unbind(struct con_driver *con) | |
3393 | { | |
3394 | return 0; | |
3395 | } | |
3396 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3397 | |
805952a8 | 3398 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3399 | const char *buf, size_t count) |
3400 | { | |
805952a8 | 3401 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3402 | int bind = simple_strtoul(buf, NULL, 0); |
3403 | ||
4c215fe8 ID |
3404 | console_lock(); |
3405 | ||
6db4063c AD |
3406 | if (bind) |
3407 | vt_bind(con); | |
3408 | else | |
3409 | vt_unbind(con); | |
3410 | ||
4c215fe8 ID |
3411 | console_unlock(); |
3412 | ||
6db4063c AD |
3413 | return count; |
3414 | } | |
3415 | ||
805952a8 GKH |
3416 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3417 | char *buf) | |
6db4063c | 3418 | { |
805952a8 | 3419 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3420 | int bind = con_is_bound(con->con); |
3421 | ||
3422 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3423 | } | |
3424 | ||
805952a8 GKH |
3425 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3426 | char *buf) | |
6db4063c | 3427 | { |
805952a8 | 3428 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3429 | |
3430 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3431 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3432 | con->desc); | |
3433 | ||
3434 | } | |
3435 | ||
1083a7be TI |
3436 | static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind); |
3437 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
3438 | ||
3439 | static struct attribute *con_dev_attrs[] = { | |
3440 | &dev_attr_bind.attr, | |
3441 | &dev_attr_name.attr, | |
3442 | NULL | |
6db4063c AD |
3443 | }; |
3444 | ||
1083a7be TI |
3445 | ATTRIBUTE_GROUPS(con_dev); |
3446 | ||
805952a8 | 3447 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c | 3448 | { |
928e964f | 3449 | con->flag |= CON_DRIVER_FLAG_ATTR; |
1083a7be | 3450 | return 0; |
6db4063c AD |
3451 | } |
3452 | ||
805952a8 | 3453 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c | 3454 | { |
1083a7be | 3455 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
6db4063c AD |
3456 | } |
3457 | ||
3e795de7 AD |
3458 | /** |
3459 | * con_is_bound - checks if driver is bound to the console | |
3460 | * @csw: console driver | |
3461 | * | |
3462 | * RETURNS: zero if unbound, nonzero if bound | |
3463 | * | |
3464 | * Drivers can call this and if zero, they should release | |
3465 | * all resources allocated on con_startup() | |
3466 | */ | |
3467 | int con_is_bound(const struct consw *csw) | |
3468 | { | |
3469 | int i, bound = 0; | |
3470 | ||
3471 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3472 | if (con_driver_map[i] == csw) { | |
3473 | bound = 1; | |
3474 | break; | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | return bound; | |
3479 | } | |
3480 | EXPORT_SYMBOL(con_is_bound); | |
3481 | ||
b45cfba4 JB |
3482 | /** |
3483 | * con_debug_enter - prepare the console for the kernel debugger | |
3484 | * @sw: console driver | |
3485 | * | |
3486 | * Called when the console is taken over by the kernel debugger, this | |
3487 | * function needs to save the current console state, then put the console | |
3488 | * into a state suitable for the kernel debugger. | |
3489 | * | |
3490 | * RETURNS: | |
3491 | * Zero on success, nonzero if a failure occurred when trying to prepare | |
3492 | * the console for the debugger. | |
3493 | */ | |
3494 | int con_debug_enter(struct vc_data *vc) | |
3495 | { | |
3496 | int ret = 0; | |
3497 | ||
3498 | saved_fg_console = fg_console; | |
3499 | saved_last_console = last_console; | |
3500 | saved_want_console = want_console; | |
3501 | saved_vc_mode = vc->vc_mode; | |
beed5336 | 3502 | saved_console_blanked = console_blanked; |
b45cfba4 JB |
3503 | vc->vc_mode = KD_TEXT; |
3504 | console_blanked = 0; | |
3505 | if (vc->vc_sw->con_debug_enter) | |
3506 | ret = vc->vc_sw->con_debug_enter(vc); | |
81d44507 JW |
3507 | #ifdef CONFIG_KGDB_KDB |
3508 | /* Set the initial LINES variable if it is not already set */ | |
3509 | if (vc->vc_rows < 999) { | |
3510 | int linecount; | |
3511 | char lns[4]; | |
3512 | const char *setargs[3] = { | |
3513 | "set", | |
3514 | "LINES", | |
3515 | lns, | |
3516 | }; | |
3517 | if (kdbgetintenv(setargs[0], &linecount)) { | |
3518 | snprintf(lns, 4, "%i", vc->vc_rows); | |
3519 | kdb_set(2, setargs); | |
3520 | } | |
3521 | } | |
17b572e8 JW |
3522 | if (vc->vc_cols < 999) { |
3523 | int colcount; | |
3524 | char cols[4]; | |
3525 | const char *setargs[3] = { | |
3526 | "set", | |
3527 | "COLUMNS", | |
3528 | cols, | |
3529 | }; | |
3530 | if (kdbgetintenv(setargs[0], &colcount)) { | |
3531 | snprintf(cols, 4, "%i", vc->vc_cols); | |
3532 | kdb_set(2, setargs); | |
3533 | } | |
3534 | } | |
81d44507 | 3535 | #endif /* CONFIG_KGDB_KDB */ |
b45cfba4 JB |
3536 | return ret; |
3537 | } | |
3538 | EXPORT_SYMBOL_GPL(con_debug_enter); | |
3539 | ||
3540 | /** | |
3541 | * con_debug_leave - restore console state | |
3542 | * @sw: console driver | |
3543 | * | |
3544 | * Restore the console state to what it was before the kernel debugger | |
3545 | * was invoked. | |
3546 | * | |
3547 | * RETURNS: | |
3548 | * Zero on success, nonzero if a failure occurred when trying to restore | |
3549 | * the console. | |
3550 | */ | |
3551 | int con_debug_leave(void) | |
3552 | { | |
3553 | struct vc_data *vc; | |
3554 | int ret = 0; | |
3555 | ||
3556 | fg_console = saved_fg_console; | |
3557 | last_console = saved_last_console; | |
3558 | want_console = saved_want_console; | |
beed5336 | 3559 | console_blanked = saved_console_blanked; |
b45cfba4 JB |
3560 | vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
3561 | ||
3562 | vc = vc_cons[fg_console].d; | |
3563 | if (vc->vc_sw->con_debug_leave) | |
3564 | ret = vc->vc_sw->con_debug_leave(vc); | |
3565 | return ret; | |
3566 | } | |
3567 | EXPORT_SYMBOL_GPL(con_debug_leave); | |
3568 | ||
50e244cc | 3569 | static int do_register_con_driver(const struct consw *csw, int first, int last) |
3e795de7 AD |
3570 | { |
3571 | struct module *owner = csw->owner; | |
3572 | struct con_driver *con_driver; | |
3573 | const char *desc; | |
96317e9e | 3574 | int i, retval; |
3e795de7 | 3575 | |
50e244cc AC |
3576 | WARN_CONSOLE_UNLOCKED(); |
3577 | ||
3e795de7 AD |
3578 | if (!try_module_get(owner)) |
3579 | return -ENODEV; | |
3580 | ||
3e795de7 AD |
3581 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3582 | con_driver = ®istered_con_driver[i]; | |
3583 | ||
3584 | /* already registered */ | |
96317e9e | 3585 | if (con_driver->con == csw) { |
c55c63c6 | 3586 | retval = -EBUSY; |
96317e9e JS |
3587 | goto err; |
3588 | } | |
3e795de7 AD |
3589 | } |
3590 | ||
3e795de7 | 3591 | desc = csw->con_startup(); |
6798df4c JS |
3592 | if (!desc) { |
3593 | retval = -ENODEV; | |
3e795de7 | 3594 | goto err; |
6798df4c | 3595 | } |
3e795de7 AD |
3596 | |
3597 | retval = -EINVAL; | |
3598 | ||
3599 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3600 | con_driver = ®istered_con_driver[i]; | |
3601 | ||
d364b5c3 ID |
3602 | if (con_driver->con == NULL && |
3603 | !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) { | |
3e795de7 AD |
3604 | con_driver->con = csw; |
3605 | con_driver->desc = desc; | |
6db4063c AD |
3606 | con_driver->node = i; |
3607 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
3608 | CON_DRIVER_FLAG_INIT; |
3609 | con_driver->first = first; | |
3610 | con_driver->last = last; | |
3611 | retval = 0; | |
3612 | break; | |
3613 | } | |
3614 | } | |
3615 | ||
6db4063c AD |
3616 | if (retval) |
3617 | goto err; | |
3618 | ||
1083a7be TI |
3619 | con_driver->dev = |
3620 | device_create_with_groups(vtconsole_class, NULL, | |
3621 | MKDEV(0, con_driver->node), | |
3622 | con_driver, con_dev_groups, | |
3623 | "vtcon%i", con_driver->node); | |
805952a8 GKH |
3624 | if (IS_ERR(con_driver->dev)) { |
3625 | printk(KERN_WARNING "Unable to create device for %s; " | |
6db4063c | 3626 | "errno = %ld\n", con_driver->desc, |
805952a8 GKH |
3627 | PTR_ERR(con_driver->dev)); |
3628 | con_driver->dev = NULL; | |
6db4063c | 3629 | } else { |
805952a8 | 3630 | vtconsole_init_device(con_driver); |
6db4063c | 3631 | } |
928e964f | 3632 | |
3e795de7 | 3633 | err: |
3e795de7 AD |
3634 | module_put(owner); |
3635 | return retval; | |
3636 | } | |
50e244cc | 3637 | |
3e795de7 AD |
3638 | |
3639 | /** | |
50539dd4 | 3640 | * do_unregister_con_driver - unregister console driver from console layer |
3e795de7 AD |
3641 | * @csw: console driver |
3642 | * | |
3643 | * DESCRIPTION: All drivers that registers to the console layer must | |
3644 | * call this function upon exit, or if the console driver is in a state | |
3645 | * where it won't be able to handle console services, such as the | |
3646 | * framebuffer console without loaded framebuffer drivers. | |
3647 | * | |
3648 | * The driver must unbind first prior to unregistration. | |
3649 | */ | |
e93a9a86 TI |
3650 | int do_unregister_con_driver(const struct consw *csw) |
3651 | { | |
d9c660e7 | 3652 | int i; |
3e795de7 AD |
3653 | |
3654 | /* cannot unregister a bound driver */ | |
3655 | if (con_is_bound(csw)) | |
d9c660e7 DV |
3656 | return -EBUSY; |
3657 | ||
3658 | if (csw == conswitchp) | |
3659 | return -EINVAL; | |
3e795de7 AD |
3660 | |
3661 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3662 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3663 | ||
2cf30f75 | 3664 | if (con_driver->con == csw) { |
d364b5c3 ID |
3665 | /* |
3666 | * Defer the removal of the sysfs entries since that | |
3667 | * will acquire the kernfs s_active lock and we can't | |
3668 | * acquire this lock while holding the console lock: | |
3669 | * the unbind sysfs entry imposes already the opposite | |
3670 | * order. Reset con already here to prevent any later | |
3671 | * lookup to succeed and mark this slot as zombie, so | |
3672 | * it won't get reused until we complete the removal | |
3673 | * in the deferred work. | |
3674 | */ | |
3e795de7 | 3675 | con_driver->con = NULL; |
d364b5c3 ID |
3676 | con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; |
3677 | schedule_work(&con_driver_unregister_work); | |
3678 | ||
d9c660e7 | 3679 | return 0; |
3e795de7 AD |
3680 | } |
3681 | } | |
d9c660e7 DV |
3682 | |
3683 | return -ENODEV; | |
3e795de7 | 3684 | } |
e93a9a86 | 3685 | EXPORT_SYMBOL_GPL(do_unregister_con_driver); |
3e795de7 | 3686 | |
d364b5c3 ID |
3687 | static void con_driver_unregister_callback(struct work_struct *ignored) |
3688 | { | |
3689 | int i; | |
3690 | ||
3691 | console_lock(); | |
3692 | ||
3693 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3694 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3695 | ||
3696 | if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) | |
3697 | continue; | |
3698 | ||
3699 | console_unlock(); | |
3700 | ||
3701 | vtconsole_deinit_device(con_driver); | |
3702 | device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); | |
3703 | ||
3704 | console_lock(); | |
3705 | ||
3706 | if (WARN_ON_ONCE(con_driver->con)) | |
3707 | con_driver->con = NULL; | |
3708 | con_driver->desc = NULL; | |
3709 | con_driver->dev = NULL; | |
3710 | con_driver->node = 0; | |
3711 | WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); | |
3712 | con_driver->flag = 0; | |
3713 | con_driver->first = 0; | |
3714 | con_driver->last = 0; | |
3715 | } | |
3716 | ||
3717 | console_unlock(); | |
3718 | } | |
3719 | ||
3e795de7 AD |
3720 | /* |
3721 | * If we support more console drivers, this function is used | |
3722 | * when a driver wants to take over some existing consoles | |
3723 | * and become default driver for newly opened ones. | |
3724 | * | |
155957f5 | 3725 | * do_take_over_console is basically a register followed by unbind |
50e244cc AC |
3726 | */ |
3727 | int do_take_over_console(const struct consw *csw, int first, int last, int deflt) | |
3728 | { | |
3729 | int err; | |
3730 | ||
3731 | err = do_register_con_driver(csw, first, last); | |
3732 | /* | |
3733 | * If we get an busy error we still want to bind the console driver | |
3734 | * and return success, as we may have unbound the console driver | |
3735 | * but not unregistered it. | |
3736 | */ | |
3737 | if (err == -EBUSY) | |
3738 | err = 0; | |
3739 | if (!err) | |
3740 | do_bind_con_driver(csw, first, last, deflt); | |
3741 | ||
3742 | return err; | |
3743 | } | |
3744 | EXPORT_SYMBOL_GPL(do_take_over_console); | |
3745 | ||
3e795de7 AD |
3746 | |
3747 | /* | |
3748 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
3749 | * work if driver is fully unbound. | |
3750 | */ | |
3751 | void give_up_console(const struct consw *csw) | |
3752 | { | |
70125e76 WY |
3753 | console_lock(); |
3754 | do_unregister_con_driver(csw); | |
3755 | console_unlock(); | |
3e795de7 AD |
3756 | } |
3757 | ||
6db4063c | 3758 | static int __init vtconsole_class_init(void) |
3e795de7 | 3759 | { |
6db4063c | 3760 | int i; |
3e795de7 | 3761 | |
6db4063c AD |
3762 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
3763 | if (IS_ERR(vtconsole_class)) { | |
3764 | printk(KERN_WARNING "Unable to create vt console class; " | |
3765 | "errno = %ld\n", PTR_ERR(vtconsole_class)); | |
3766 | vtconsole_class = NULL; | |
3767 | } | |
3e795de7 | 3768 | |
6db4063c | 3769 | /* Add system drivers to sysfs */ |
3e795de7 AD |
3770 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3771 | struct con_driver *con = ®istered_con_driver[i]; | |
3772 | ||
805952a8 | 3773 | if (con->con && !con->dev) { |
1083a7be TI |
3774 | con->dev = |
3775 | device_create_with_groups(vtconsole_class, NULL, | |
3776 | MKDEV(0, con->node), | |
3777 | con, con_dev_groups, | |
3778 | "vtcon%i", con->node); | |
6db4063c | 3779 | |
805952a8 | 3780 | if (IS_ERR(con->dev)) { |
6db4063c | 3781 | printk(KERN_WARNING "Unable to create " |
805952a8 GKH |
3782 | "device for %s; errno = %ld\n", |
3783 | con->desc, PTR_ERR(con->dev)); | |
3784 | con->dev = NULL; | |
6db4063c | 3785 | } else { |
805952a8 | 3786 | vtconsole_init_device(con); |
6db4063c | 3787 | } |
3e795de7 | 3788 | } |
3e795de7 AD |
3789 | } |
3790 | ||
3e795de7 AD |
3791 | return 0; |
3792 | } | |
6db4063c | 3793 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 3794 | |
1da177e4 LT |
3795 | #endif |
3796 | ||
3797 | /* | |
3798 | * Screen blanking | |
3799 | */ | |
3800 | ||
403aac96 | 3801 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 3802 | { |
403aac96 YY |
3803 | unsigned int mode; |
3804 | ||
3805 | if (get_user(mode, p + 1)) | |
3806 | return -EFAULT; | |
3807 | ||
3808 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
3809 | return 0; | |
1da177e4 LT |
3810 | } |
3811 | ||
1da177e4 LT |
3812 | void do_blank_screen(int entering_gfx) |
3813 | { | |
3814 | struct vc_data *vc = vc_cons[fg_console].d; | |
3815 | int i; | |
3816 | ||
3817 | WARN_CONSOLE_UNLOCKED(); | |
3818 | ||
3819 | if (console_blanked) { | |
3820 | if (blank_state == blank_vesa_wait) { | |
3821 | blank_state = blank_off; | |
d060a321 | 3822 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
3823 | } |
3824 | return; | |
3825 | } | |
1da177e4 LT |
3826 | |
3827 | /* entering graphics mode? */ | |
3828 | if (entering_gfx) { | |
3829 | hide_cursor(vc); | |
3830 | save_screen(vc); | |
3831 | vc->vc_sw->con_blank(vc, -1, 1); | |
3832 | console_blanked = fg_console + 1; | |
b6e8f00f | 3833 | blank_state = blank_off; |
1da177e4 LT |
3834 | set_origin(vc); |
3835 | return; | |
3836 | } | |
3837 | ||
b6e8f00f | 3838 | if (blank_state != blank_normal_wait) |
3839 | return; | |
3840 | blank_state = blank_off; | |
3841 | ||
1da177e4 LT |
3842 | /* don't blank graphics */ |
3843 | if (vc->vc_mode != KD_TEXT) { | |
3844 | console_blanked = fg_console + 1; | |
3845 | return; | |
3846 | } | |
3847 | ||
3848 | hide_cursor(vc); | |
3849 | del_timer_sync(&console_timer); | |
3850 | blank_timer_expired = 0; | |
3851 | ||
3852 | save_screen(vc); | |
3853 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 3854 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
3855 | console_blanked = fg_console + 1; |
3856 | if (i) | |
3857 | set_origin(vc); | |
3858 | ||
3859 | if (console_blank_hook && console_blank_hook(1)) | |
3860 | return; | |
3861 | ||
d060a321 | 3862 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 3863 | blank_state = blank_vesa_wait; |
1da177e4 LT |
3864 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
3865 | } | |
8b92e87d | 3866 | vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3867 | } |
3868 | EXPORT_SYMBOL(do_blank_screen); | |
3869 | ||
3870 | /* | |
3871 | * Called by timer as well as from vt_console_driver | |
3872 | */ | |
3873 | void do_unblank_screen(int leaving_gfx) | |
3874 | { | |
3875 | struct vc_data *vc; | |
3876 | ||
3877 | /* This should now always be called from a "sane" (read: can schedule) | |
3878 | * context for the sake of the low level drivers, except in the special | |
3879 | * case of oops_in_progress | |
3880 | */ | |
3881 | if (!oops_in_progress) | |
3882 | might_sleep(); | |
3883 | ||
3884 | WARN_CONSOLE_UNLOCKED(); | |
3885 | ||
3886 | ignore_poke = 0; | |
3887 | if (!console_blanked) | |
3888 | return; | |
3889 | if (!vc_cons_allocated(fg_console)) { | |
3890 | /* impossible */ | |
e620e548 JP |
3891 | pr_warn("unblank_screen: tty %d not allocated ??\n", |
3892 | fg_console + 1); | |
1da177e4 LT |
3893 | return; |
3894 | } | |
3895 | vc = vc_cons[fg_console].d; | |
8fd4bd22 JB |
3896 | /* Try to unblank in oops case too */ |
3897 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) | |
1da177e4 LT |
3898 | return; /* but leave console_blanked != 0 */ |
3899 | ||
3900 | if (blankinterval) { | |
f324edc8 | 3901 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3902 | blank_state = blank_normal_wait; |
3903 | } | |
3904 | ||
3905 | console_blanked = 0; | |
8fd4bd22 | 3906 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) |
1da177e4 LT |
3907 | /* Low-level driver cannot restore -> do it ourselves */ |
3908 | update_screen(vc); | |
3909 | if (console_blank_hook) | |
3910 | console_blank_hook(0); | |
3911 | set_palette(vc); | |
3912 | set_cursor(vc); | |
8b92e87d | 3913 | vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3914 | } |
3915 | EXPORT_SYMBOL(do_unblank_screen); | |
3916 | ||
3917 | /* | |
3918 | * This is called by the outside world to cause a forced unblank, mostly for | |
3919 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
3920 | * call it with 1 as an argument and so force a mode restore... that may kill | |
3921 | * X or at least garbage the screen but would also make the Oops visible... | |
3922 | */ | |
3923 | void unblank_screen(void) | |
3924 | { | |
3925 | do_unblank_screen(0); | |
3926 | } | |
3927 | ||
3928 | /* | |
70522e12 | 3929 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 3930 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 3931 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 LT |
3932 | */ |
3933 | static void blank_screen_t(unsigned long dummy) | |
3934 | { | |
3935 | blank_timer_expired = 1; | |
3936 | schedule_work(&console_work); | |
3937 | } | |
3938 | ||
3939 | void poke_blanked_console(void) | |
3940 | { | |
3941 | WARN_CONSOLE_UNLOCKED(); | |
3942 | ||
3943 | /* Add this so we quickly catch whoever might call us in a non | |
3944 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
3945 | * atomic contexts and is allowed to schedule (with the special case | |
3946 | * of oops_in_progress, but that isn't of any concern for this | |
3947 | * function. --BenH. | |
3948 | */ | |
3949 | might_sleep(); | |
3950 | ||
3951 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
3952 | * at worse, we'll do a spurrious blank and it's unlikely | |
3953 | */ | |
3954 | del_timer(&console_timer); | |
3955 | blank_timer_expired = 0; | |
3956 | ||
3957 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
3958 | return; | |
3959 | if (console_blanked) | |
3960 | unblank_screen(); | |
3961 | else if (blankinterval) { | |
f324edc8 | 3962 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3963 | blank_state = blank_normal_wait; |
3964 | } | |
3965 | } | |
3966 | ||
3967 | /* | |
3968 | * Palettes | |
3969 | */ | |
3970 | ||
3971 | static void set_palette(struct vc_data *vc) | |
3972 | { | |
3973 | WARN_CONSOLE_UNLOCKED(); | |
3974 | ||
709280da | 3975 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette) |
1da177e4 LT |
3976 | vc->vc_sw->con_set_palette(vc, color_table); |
3977 | } | |
3978 | ||
1da177e4 LT |
3979 | /* |
3980 | * Load palette into the DAC registers. arg points to a colour | |
3981 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
3982 | */ | |
3983 | ||
3984 | int con_set_cmap(unsigned char __user *arg) | |
3985 | { | |
871bdea6 MG |
3986 | int i, j, k; |
3987 | unsigned char colormap[3*16]; | |
3988 | ||
3989 | if (copy_from_user(colormap, arg, sizeof(colormap))) | |
3990 | return -EFAULT; | |
1da177e4 | 3991 | |
ac751efa | 3992 | console_lock(); |
871bdea6 MG |
3993 | for (i = k = 0; i < 16; i++) { |
3994 | default_red[i] = colormap[k++]; | |
3995 | default_grn[i] = colormap[k++]; | |
3996 | default_blu[i] = colormap[k++]; | |
3997 | } | |
3998 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3999 | if (!vc_cons_allocated(i)) | |
4000 | continue; | |
4001 | for (j = k = 0; j < 16; j++) { | |
4002 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
4003 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
4004 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
4005 | } | |
4006 | set_palette(vc_cons[i].d); | |
4007 | } | |
ac751efa | 4008 | console_unlock(); |
1da177e4 | 4009 | |
871bdea6 | 4010 | return 0; |
1da177e4 LT |
4011 | } |
4012 | ||
4013 | int con_get_cmap(unsigned char __user *arg) | |
4014 | { | |
871bdea6 MG |
4015 | int i, k; |
4016 | unsigned char colormap[3*16]; | |
1da177e4 | 4017 | |
ac751efa | 4018 | console_lock(); |
871bdea6 MG |
4019 | for (i = k = 0; i < 16; i++) { |
4020 | colormap[k++] = default_red[i]; | |
4021 | colormap[k++] = default_grn[i]; | |
4022 | colormap[k++] = default_blu[i]; | |
4023 | } | |
ac751efa | 4024 | console_unlock(); |
1da177e4 | 4025 | |
871bdea6 MG |
4026 | if (copy_to_user(arg, colormap, sizeof(colormap))) |
4027 | return -EFAULT; | |
4028 | ||
4029 | return 0; | |
1da177e4 LT |
4030 | } |
4031 | ||
4032 | void reset_palette(struct vc_data *vc) | |
4033 | { | |
4034 | int j, k; | |
4035 | for (j=k=0; j<16; j++) { | |
4036 | vc->vc_palette[k++] = default_red[j]; | |
4037 | vc->vc_palette[k++] = default_grn[j]; | |
4038 | vc->vc_palette[k++] = default_blu[j]; | |
4039 | } | |
4040 | set_palette(vc); | |
4041 | } | |
4042 | ||
4043 | /* | |
4044 | * Font switching | |
4045 | * | |
4046 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
4047 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
4048 | * depending on width) reserved for each character which is kinda wasty, but | |
4049 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
25985edc | 4050 | * is up to the actual low-level console-driver convert data into its favorite |
1da177e4 LT |
4051 | * format (maybe we should add a `fontoffset' field to the `display' |
4052 | * structure so we won't have to convert the fontdata all the time. | |
4053 | * /Jes | |
4054 | */ | |
4055 | ||
4056 | #define max_font_size 65536 | |
4057 | ||
4058 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
4059 | { | |
4060 | struct console_font font; | |
4061 | int rc = -EINVAL; | |
4062 | int c; | |
4063 | ||
1da177e4 LT |
4064 | if (op->data) { |
4065 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
4066 | if (!font.data) | |
4067 | return -ENOMEM; | |
4068 | } else | |
4069 | font.data = NULL; | |
4070 | ||
ac751efa | 4071 | console_lock(); |
edab558f AC |
4072 | if (vc->vc_mode != KD_TEXT) |
4073 | rc = -EINVAL; | |
4074 | else if (vc->vc_sw->con_font_get) | |
1da177e4 LT |
4075 | rc = vc->vc_sw->con_font_get(vc, &font); |
4076 | else | |
4077 | rc = -ENOSYS; | |
ac751efa | 4078 | console_unlock(); |
1da177e4 LT |
4079 | |
4080 | if (rc) | |
4081 | goto out; | |
4082 | ||
4083 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 4084 | |
1da177e4 LT |
4085 | if (op->data && font.charcount > op->charcount) |
4086 | rc = -ENOSPC; | |
4087 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
4088 | if (font.width > op->width || font.height > op->height) | |
4089 | rc = -ENOSPC; | |
4090 | } else { | |
4091 | if (font.width != 8) | |
4092 | rc = -EIO; | |
4093 | else if ((op->height && font.height > op->height) || | |
4094 | font.height > 32) | |
4095 | rc = -ENOSPC; | |
4096 | } | |
4097 | if (rc) | |
4098 | goto out; | |
4099 | ||
4100 | op->height = font.height; | |
4101 | op->width = font.width; | |
4102 | op->charcount = font.charcount; | |
4103 | ||
4104 | if (op->data && copy_to_user(op->data, font.data, c)) | |
4105 | rc = -EFAULT; | |
4106 | ||
4107 | out: | |
4108 | kfree(font.data); | |
4109 | return rc; | |
4110 | } | |
4111 | ||
4112 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
4113 | { | |
4114 | struct console_font font; | |
4115 | int rc = -EINVAL; | |
4116 | int size; | |
4117 | ||
4118 | if (vc->vc_mode != KD_TEXT) | |
4119 | return -EINVAL; | |
4120 | if (!op->data) | |
4121 | return -EINVAL; | |
4122 | if (op->charcount > 512) | |
4123 | return -EINVAL; | |
4124 | if (!op->height) { /* Need to guess font height [compat] */ | |
4125 | int h, i; | |
4126 | u8 __user *charmap = op->data; | |
4127 | u8 tmp; | |
4128 | ||
4129 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, | |
4130 | so that we can get rid of this soon */ | |
4131 | if (!(op->flags & KD_FONT_FLAG_OLD)) | |
4132 | return -EINVAL; | |
4133 | for (h = 32; h > 0; h--) | |
4134 | for (i = 0; i < op->charcount; i++) { | |
4135 | if (get_user(tmp, &charmap[32*i+h-1])) | |
4136 | return -EFAULT; | |
4137 | if (tmp) | |
4138 | goto nonzero; | |
4139 | } | |
4140 | return -EINVAL; | |
4141 | nonzero: | |
4142 | op->height = h; | |
4143 | } | |
4144 | if (op->width <= 0 || op->width > 32 || op->height > 32) | |
4145 | return -EINVAL; | |
4146 | size = (op->width+7)/8 * 32 * op->charcount; | |
4147 | if (size > max_font_size) | |
4148 | return -ENOSPC; | |
4149 | font.charcount = op->charcount; | |
4150 | font.height = op->height; | |
4151 | font.width = op->width; | |
9b71ca20 JL |
4152 | font.data = memdup_user(op->data, size); |
4153 | if (IS_ERR(font.data)) | |
4154 | return PTR_ERR(font.data); | |
ac751efa | 4155 | console_lock(); |
edab558f AC |
4156 | if (vc->vc_mode != KD_TEXT) |
4157 | rc = -EINVAL; | |
4158 | else if (vc->vc_sw->con_font_set) | |
1da177e4 LT |
4159 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
4160 | else | |
4161 | rc = -ENOSYS; | |
ac751efa | 4162 | console_unlock(); |
1da177e4 LT |
4163 | kfree(font.data); |
4164 | return rc; | |
4165 | } | |
4166 | ||
4167 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
4168 | { | |
4169 | struct console_font font = {.width = op->width, .height = op->height}; | |
4170 | char name[MAX_FONT_NAME]; | |
4171 | char *s = name; | |
4172 | int rc; | |
4173 | ||
1da177e4 LT |
4174 | |
4175 | if (!op->data) | |
4176 | s = NULL; | |
4177 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
4178 | return -EFAULT; | |
4179 | else | |
4180 | name[MAX_FONT_NAME - 1] = 0; | |
4181 | ||
ac751efa | 4182 | console_lock(); |
edab558f AC |
4183 | if (vc->vc_mode != KD_TEXT) { |
4184 | console_unlock(); | |
4185 | return -EINVAL; | |
4186 | } | |
1da177e4 LT |
4187 | if (vc->vc_sw->con_font_default) |
4188 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
4189 | else | |
4190 | rc = -ENOSYS; | |
ac751efa | 4191 | console_unlock(); |
1da177e4 LT |
4192 | if (!rc) { |
4193 | op->width = font.width; | |
4194 | op->height = font.height; | |
4195 | } | |
4196 | return rc; | |
4197 | } | |
4198 | ||
4199 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4200 | { | |
4201 | int con = op->height; | |
4202 | int rc; | |
4203 | ||
1da177e4 | 4204 | |
ac751efa | 4205 | console_lock(); |
edab558f AC |
4206 | if (vc->vc_mode != KD_TEXT) |
4207 | rc = -EINVAL; | |
4208 | else if (!vc->vc_sw->con_font_copy) | |
1da177e4 LT |
4209 | rc = -ENOSYS; |
4210 | else if (con < 0 || !vc_cons_allocated(con)) | |
4211 | rc = -ENOTTY; | |
4212 | else if (con == vc->vc_num) /* nothing to do */ | |
4213 | rc = 0; | |
4214 | else | |
4215 | rc = vc->vc_sw->con_font_copy(vc, con); | |
ac751efa | 4216 | console_unlock(); |
1da177e4 LT |
4217 | return rc; |
4218 | } | |
4219 | ||
4220 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4221 | { | |
4222 | switch (op->op) { | |
4223 | case KD_FONT_OP_SET: | |
4224 | return con_font_set(vc, op); | |
4225 | case KD_FONT_OP_GET: | |
4226 | return con_font_get(vc, op); | |
4227 | case KD_FONT_OP_SET_DEFAULT: | |
4228 | return con_font_default(vc, op); | |
4229 | case KD_FONT_OP_COPY: | |
4230 | return con_font_copy(vc, op); | |
4231 | } | |
4232 | return -ENOSYS; | |
4233 | } | |
4234 | ||
4235 | /* | |
4236 | * Interface exported to selection and vcs. | |
4237 | */ | |
4238 | ||
4239 | /* used by selection */ | |
4240 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4241 | { | |
4242 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4243 | u16 c = w & 0xff; | |
4244 | ||
4245 | if (w & vc->vc_hi_font_mask) | |
4246 | c |= 0x100; | |
4247 | return c; | |
4248 | } | |
f7511d5f | 4249 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 LT |
4250 | |
4251 | /* used by vcs - note the word offset */ | |
4252 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4253 | { | |
4254 | return screenpos(vc, 2 * w_offset, viewed); | |
4255 | } | |
88867e3d | 4256 | EXPORT_SYMBOL_GPL(screen_pos); |
1da177e4 LT |
4257 | |
4258 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4259 | { | |
4260 | p[0] = vc->vc_x; | |
4261 | p[1] = vc->vc_y; | |
4262 | } | |
4263 | ||
4264 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4265 | { | |
9477e260 | 4266 | hide_cursor(vc); |
1da177e4 LT |
4267 | gotoxy(vc, p[0], p[1]); |
4268 | set_cursor(vc); | |
4269 | } | |
4270 | ||
4271 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4272 | { | |
4273 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4274 | return softcursor_original; | |
4275 | return scr_readw(org); | |
4276 | } | |
4277 | ||
4278 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4279 | { | |
4280 | scr_writew(val, org); | |
4281 | if ((unsigned long)org == vc->vc_pos) { | |
4282 | softcursor_original = -1; | |
4283 | add_softcursor(vc); | |
4284 | } | |
4285 | } | |
4286 | ||
432c9ed2 NP |
4287 | void vcs_scr_updated(struct vc_data *vc) |
4288 | { | |
4289 | notify_update(vc); | |
4290 | } | |
4291 | ||
35cc56f9 JS |
4292 | void vc_scrolldelta_helper(struct vc_data *c, int lines, |
4293 | unsigned int rolled_over, void *base, unsigned int size) | |
4294 | { | |
4295 | unsigned long ubase = (unsigned long)base; | |
210fd746 JS |
4296 | ptrdiff_t scr_end = (void *)c->vc_scr_end - base; |
4297 | ptrdiff_t vorigin = (void *)c->vc_visible_origin - base; | |
4298 | ptrdiff_t origin = (void *)c->vc_origin - base; | |
35cc56f9 | 4299 | int margin = c->vc_size_row * 4; |
7c918cdc | 4300 | int from, wrap, from_off, avail; |
35cc56f9 JS |
4301 | |
4302 | /* Turn scrollback off */ | |
4303 | if (!lines) { | |
4304 | c->vc_visible_origin = c->vc_origin; | |
4305 | return; | |
4306 | } | |
4307 | ||
4308 | /* Do we have already enough to allow jumping from 0 to the end? */ | |
210fd746 | 4309 | if (rolled_over > scr_end + margin) { |
7c918cdc JS |
4310 | from = scr_end; |
4311 | wrap = rolled_over + c->vc_size_row; | |
35cc56f9 | 4312 | } else { |
7c918cdc JS |
4313 | from = 0; |
4314 | wrap = size; | |
35cc56f9 JS |
4315 | } |
4316 | ||
7c918cdc JS |
4317 | from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; |
4318 | avail = (origin - from + wrap) % wrap; | |
35cc56f9 JS |
4319 | |
4320 | /* Only a little piece would be left? Show all incl. the piece! */ | |
7c918cdc | 4321 | if (avail < 2 * margin) |
35cc56f9 | 4322 | margin = 0; |
7c918cdc JS |
4323 | if (from_off < margin) |
4324 | from_off = 0; | |
4325 | if (from_off > avail - margin) | |
4326 | from_off = avail; | |
35cc56f9 | 4327 | |
7c918cdc | 4328 | c->vc_visible_origin = ubase + (from + from_off) % wrap; |
35cc56f9 JS |
4329 | } |
4330 | EXPORT_SYMBOL_GPL(vc_scrolldelta_helper); | |
4331 | ||
1da177e4 LT |
4332 | /* |
4333 | * Visible symbols for modules | |
4334 | */ | |
4335 | ||
4336 | EXPORT_SYMBOL(color_table); | |
4337 | EXPORT_SYMBOL(default_red); | |
4338 | EXPORT_SYMBOL(default_grn); | |
4339 | EXPORT_SYMBOL(default_blu); | |
4340 | EXPORT_SYMBOL(update_region); | |
4341 | EXPORT_SYMBOL(redraw_screen); | |
4342 | EXPORT_SYMBOL(vc_resize); | |
4343 | EXPORT_SYMBOL(fg_console); | |
4344 | EXPORT_SYMBOL(console_blank_hook); | |
4345 | EXPORT_SYMBOL(console_blanked); | |
4346 | EXPORT_SYMBOL(vc_cons); | |
f6c06b68 | 4347 | EXPORT_SYMBOL(global_cursor_default); |
1da177e4 | 4348 | #ifndef VT_SINGLE_DRIVER |
1da177e4 LT |
4349 | EXPORT_SYMBOL(give_up_console); |
4350 | #endif |