Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1991, 1992 Linus Torvalds |
3 | */ | |
4 | ||
5 | /* | |
6 | * Hopefully this will be a rather complete VT102 implementation. | |
7 | * | |
8 | * Beeping thanks to John T Kohl. | |
9 | * | |
10 | * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics | |
11 | * Chars, and VT100 enhancements by Peter MacDonald. | |
12 | * | |
13 | * Copy and paste function by Andrew Haylett, | |
14 | * some enhancements by Alessandro Rubini. | |
15 | * | |
16 | * Code to check for different video-cards mostly by Galen Hunt, | |
17 | * <g-hunt@ee.utah.edu> | |
18 | * | |
19 | * Rudimentary ISO 10646/Unicode/UTF-8 character set support by | |
20 | * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. | |
21 | * | |
22 | * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 | |
23 | * Resizing of consoles, aeb, 940926 | |
24 | * | |
25 | * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 | |
26 | * <poe@daimi.aau.dk> | |
27 | * | |
28 | * User-defined bell sound, new setterm control sequences and printk | |
29 | * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 | |
30 | * | |
31 | * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> | |
32 | * | |
33 | * Merge with the abstract console driver by Geert Uytterhoeven | |
34 | * <geert@linux-m68k.org>, Jan 1997. | |
35 | * | |
36 | * Original m68k console driver modifications by | |
37 | * | |
38 | * - Arno Griffioen <arno@usn.nl> | |
39 | * - David Carter <carter@cs.bris.ac.uk> | |
40 | * | |
41 | * The abstract console driver provides a generic interface for a text | |
42 | * console. It supports VGA text mode, frame buffer based graphical consoles | |
43 | * and special graphics processors that are only accessible through some | |
44 | * registers (e.g. a TMS340x0 GSP). | |
45 | * | |
46 | * The interface to the hardware is specified using a special structure | |
47 | * (struct consw) which contains function pointers to console operations | |
48 | * (see <linux/console.h> for more information). | |
49 | * | |
50 | * Support for changeable cursor shape | |
51 | * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 | |
52 | * | |
53 | * Ported to i386 and con_scrolldelta fixed | |
54 | * by Emmanuel Marty <core@ggi-project.org>, April 1998 | |
55 | * | |
56 | * Resurrected character buffers in videoram plus lots of other trickery | |
57 | * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 | |
58 | * | |
59 | * Removed old-style timers, introduced console_timer, made timer | |
e1f8e874 | 60 | * deletion SMP-safe. 17Jun00, Andrew Morton |
1da177e4 LT |
61 | * |
62 | * Removed console_lock, enabled interrupts across all console operations | |
63 | * 13 March 2001, Andrew Morton | |
d4328b40 AT |
64 | * |
65 | * Fixed UTF-8 mode so alternate charset modes always work according | |
66 | * to control sequences interpreted in do_con_trol function | |
67 | * preserving backward VT100 semigraphics compatibility, | |
68 | * malformed UTF sequences represented as sequences of replacement glyphs, | |
69 | * original codes or '?' as a last resort if replacement glyph is undefined | |
70 | * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 | |
1da177e4 LT |
71 | */ |
72 | ||
73 | #include <linux/module.h> | |
74 | #include <linux/types.h> | |
75 | #include <linux/sched.h> | |
76 | #include <linux/tty.h> | |
77 | #include <linux/tty_flip.h> | |
78 | #include <linux/kernel.h> | |
79 | #include <linux/string.h> | |
80 | #include <linux/errno.h> | |
81 | #include <linux/kd.h> | |
82 | #include <linux/slab.h> | |
83 | #include <linux/major.h> | |
84 | #include <linux/mm.h> | |
85 | #include <linux/console.h> | |
86 | #include <linux/init.h> | |
c831c338 | 87 | #include <linux/mutex.h> |
1da177e4 LT |
88 | #include <linux/vt_kern.h> |
89 | #include <linux/selection.h> | |
90 | #include <linux/tiocl.h> | |
91 | #include <linux/kbd_kern.h> | |
92 | #include <linux/consolemap.h> | |
93 | #include <linux/timer.h> | |
94 | #include <linux/interrupt.h> | |
1da177e4 | 95 | #include <linux/workqueue.h> |
1da177e4 LT |
96 | #include <linux/pm.h> |
97 | #include <linux/font.h> | |
98 | #include <linux/bitops.h> | |
b293d758 | 99 | #include <linux/notifier.h> |
d81ed103 AC |
100 | #include <linux/device.h> |
101 | #include <linux/io.h> | |
1da177e4 | 102 | #include <asm/system.h> |
d81ed103 | 103 | #include <linux/uaccess.h> |
81d44507 | 104 | #include <linux/kdb.h> |
74c807ce | 105 | #include <linux/ctype.h> |
1da177e4 | 106 | |
3e795de7 | 107 | #define MAX_NR_CON_DRIVER 16 |
1da177e4 | 108 | |
6db4063c | 109 | #define CON_DRIVER_FLAG_MODULE 1 |
928e964f AD |
110 | #define CON_DRIVER_FLAG_INIT 2 |
111 | #define CON_DRIVER_FLAG_ATTR 4 | |
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) | |
139 | ||
1da177e4 LT |
140 | struct vc vc_cons [MAX_NR_CONSOLES]; |
141 | ||
142 | #ifndef VT_SINGLE_DRIVER | |
143 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; | |
144 | #endif | |
145 | ||
146 | static int con_open(struct tty_struct *, struct file *); | |
147 | static void vc_init(struct vc_data *vc, unsigned int rows, | |
148 | unsigned int cols, int do_clear); | |
149 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); | |
150 | static void save_cur(struct vc_data *vc); | |
151 | static void reset_terminal(struct vc_data *vc, int do_clear); | |
152 | static void con_flush_chars(struct tty_struct *tty); | |
403aac96 | 153 | static int set_vesa_blanking(char __user *p); |
1da177e4 LT |
154 | static void set_cursor(struct vc_data *vc); |
155 | static void hide_cursor(struct vc_data *vc); | |
65f27f38 | 156 | static void console_callback(struct work_struct *ignored); |
1da177e4 LT |
157 | static void blank_screen_t(unsigned long dummy); |
158 | static void set_palette(struct vc_data *vc); | |
159 | ||
160 | static int printable; /* Is console ready for printing? */ | |
77bf2bab | 161 | int default_utf8 = true; |
042f10ec | 162 | module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
f6c06b68 MG |
163 | int global_cursor_default = -1; |
164 | module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); | |
1da177e4 | 165 | |
9ea9a886 CL |
166 | static int cur_default = CUR_DEFAULT; |
167 | module_param(cur_default, int, S_IRUGO | S_IWUSR); | |
168 | ||
1da177e4 LT |
169 | /* |
170 | * ignore_poke: don't unblank the screen when things are typed. This is | |
171 | * mainly for the privacy of braille terminal users. | |
172 | */ | |
173 | static int ignore_poke; | |
174 | ||
175 | int do_poke_blanked_console; | |
176 | int console_blanked; | |
177 | ||
178 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ | |
1da177e4 | 179 | static int vesa_off_interval; |
f324edc8 DM |
180 | static int blankinterval = 10*60; |
181 | core_param(consoleblank, blankinterval, int, 0444); | |
1da177e4 | 182 | |
65f27f38 | 183 | static DECLARE_WORK(console_work, console_callback); |
1da177e4 LT |
184 | |
185 | /* | |
186 | * fg_console is the current virtual console, | |
187 | * last_console is the last used one, | |
188 | * want_console is the console we want to switch to, | |
b45cfba4 | 189 | * saved_* variants are for save/restore around kernel debugger enter/leave |
1da177e4 LT |
190 | */ |
191 | int fg_console; | |
192 | int last_console; | |
193 | int want_console = -1; | |
fed891c8 JW |
194 | static int saved_fg_console; |
195 | static int saved_last_console; | |
196 | static int saved_want_console; | |
197 | static int saved_vc_mode; | |
beed5336 | 198 | static int saved_console_blanked; |
1da177e4 LT |
199 | |
200 | /* | |
201 | * For each existing display, we have a pointer to console currently visible | |
202 | * on that display, allowing consoles other than fg_console to be refreshed | |
203 | * appropriately. Unless the low-level driver supplies its own display_fg | |
204 | * variable, we use this one for the "master display". | |
205 | */ | |
206 | static struct vc_data *master_display_fg; | |
207 | ||
208 | /* | |
209 | * Unfortunately, we need to delay tty echo when we're currently writing to the | |
210 | * console since the code is (and always was) not re-entrant, so we schedule | |
211 | * all flip requests to process context with schedule-task() and run it from | |
212 | * console_callback(). | |
213 | */ | |
214 | ||
215 | /* | |
216 | * For the same reason, we defer scrollback to the console callback. | |
217 | */ | |
218 | static int scrollback_delta; | |
219 | ||
220 | /* | |
221 | * Hook so that the power management routines can (un)blank | |
222 | * the console on our behalf. | |
223 | */ | |
224 | int (*console_blank_hook)(int); | |
225 | ||
40565f19 | 226 | static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); |
1da177e4 LT |
227 | static int blank_state; |
228 | static int blank_timer_expired; | |
229 | enum { | |
230 | blank_off = 0, | |
231 | blank_normal_wait, | |
232 | blank_vesa_wait, | |
233 | }; | |
234 | ||
fbc92a34 KS |
235 | /* |
236 | * /sys/class/tty/tty0/ | |
237 | * | |
238 | * the attribute 'active' contains the name of the current vc | |
239 | * console and it supports poll() to detect vc switches | |
240 | */ | |
241 | static struct device *tty0dev; | |
242 | ||
b293d758 ST |
243 | /* |
244 | * Notifier list for console events. | |
245 | */ | |
246 | static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); | |
247 | ||
248 | int register_vt_notifier(struct notifier_block *nb) | |
249 | { | |
250 | return atomic_notifier_chain_register(&vt_notifier_list, nb); | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(register_vt_notifier); | |
253 | ||
254 | int unregister_vt_notifier(struct notifier_block *nb) | |
255 | { | |
256 | return atomic_notifier_chain_unregister(&vt_notifier_list, nb); | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(unregister_vt_notifier); | |
259 | ||
260 | static void notify_write(struct vc_data *vc, unsigned int unicode) | |
261 | { | |
502fcb79 | 262 | struct vt_notifier_param param = { .vc = vc, .c = unicode }; |
b293d758 ST |
263 | atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); |
264 | } | |
265 | ||
266 | static void notify_update(struct vc_data *vc) | |
267 | { | |
268 | struct vt_notifier_param param = { .vc = vc }; | |
269 | atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); | |
270 | } | |
1da177e4 LT |
271 | /* |
272 | * Low-Level Functions | |
273 | */ | |
274 | ||
275 | #define IS_FG(vc) ((vc)->vc_num == fg_console) | |
276 | ||
277 | #ifdef VT_BUF_VRAM_ONLY | |
278 | #define DO_UPDATE(vc) 0 | |
279 | #else | |
f700d6e5 | 280 | #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) |
1da177e4 LT |
281 | #endif |
282 | ||
283 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) | |
284 | { | |
285 | unsigned short *p; | |
286 | ||
287 | if (!viewed) | |
288 | p = (unsigned short *)(vc->vc_origin + offset); | |
289 | else if (!vc->vc_sw->con_screen_pos) | |
290 | p = (unsigned short *)(vc->vc_visible_origin + offset); | |
291 | else | |
292 | p = vc->vc_sw->con_screen_pos(vc, offset); | |
293 | return p; | |
294 | } | |
295 | ||
e33ac1c1 | 296 | /* Called from the keyboard irq path.. */ |
1da177e4 LT |
297 | static inline void scrolldelta(int lines) |
298 | { | |
e33ac1c1 AC |
299 | /* FIXME */ |
300 | /* scrolldelta needs some kind of consistency lock, but the BKL was | |
301 | and still is not protecting versus the scheduled back end */ | |
1da177e4 LT |
302 | scrollback_delta += lines; |
303 | schedule_console_callback(); | |
304 | } | |
305 | ||
306 | void schedule_console_callback(void) | |
307 | { | |
308 | schedule_work(&console_work); | |
309 | } | |
310 | ||
311 | static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
312 | { | |
313 | unsigned short *d, *s; | |
314 | ||
315 | if (t+nr >= b) | |
316 | nr = b - t - 1; | |
317 | if (b > vc->vc_rows || t >= b || nr < 1) | |
318 | return; | |
319 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) | |
320 | return; | |
321 | d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
322 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
323 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
386f40c8 | 324 | scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, |
1da177e4 LT |
325 | vc->vc_size_row * nr); |
326 | } | |
327 | ||
328 | static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
329 | { | |
330 | unsigned short *s; | |
331 | unsigned int step; | |
332 | ||
333 | if (t+nr >= b) | |
334 | nr = b - t - 1; | |
335 | if (b > vc->vc_rows || t >= b || nr < 1) | |
336 | return; | |
337 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) | |
338 | return; | |
339 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
340 | step = vc->vc_cols * nr; | |
341 | scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); | |
93f78da4 | 342 | scr_memsetw(s, vc->vc_video_erase_char, 2 * step); |
1da177e4 LT |
343 | } |
344 | ||
345 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
346 | { | |
347 | #ifndef VT_BUF_VRAM_ONLY | |
348 | unsigned int xx, yy, offset; | |
349 | u16 *p; | |
350 | ||
351 | p = (u16 *) start; | |
352 | if (!vc->vc_sw->con_getxy) { | |
353 | offset = (start - vc->vc_origin) / 2; | |
354 | xx = offset % vc->vc_cols; | |
355 | yy = offset / vc->vc_cols; | |
356 | } else { | |
357 | int nxx, nyy; | |
358 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
359 | xx = nxx; yy = nyy; | |
360 | } | |
361 | for(;;) { | |
362 | u16 attrib = scr_readw(p) & 0xff00; | |
363 | int startx = xx; | |
364 | u16 *q = p; | |
365 | while (xx < vc->vc_cols && count) { | |
366 | if (attrib != (scr_readw(p) & 0xff00)) { | |
367 | if (p > q) | |
368 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
369 | startx = xx; | |
370 | q = p; | |
371 | attrib = scr_readw(p) & 0xff00; | |
372 | } | |
373 | p++; | |
374 | xx++; | |
375 | count--; | |
376 | } | |
377 | if (p > q) | |
378 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
379 | if (!count) | |
380 | break; | |
381 | xx = 0; | |
382 | yy++; | |
383 | if (vc->vc_sw->con_getxy) { | |
384 | p = (u16 *)start; | |
385 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
386 | } | |
387 | } | |
388 | #endif | |
389 | } | |
390 | ||
391 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
392 | { | |
393 | WARN_CONSOLE_UNLOCKED(); | |
394 | ||
395 | if (DO_UPDATE(vc)) { | |
396 | hide_cursor(vc); | |
397 | do_update_region(vc, start, count); | |
398 | set_cursor(vc); | |
399 | } | |
400 | } | |
401 | ||
402 | /* Structure of attributes is hardware-dependent */ | |
403 | ||
fa6ce9ab JE |
404 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
405 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
406 | { |
407 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
408 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
409 | _blink, _underline, _reverse, _italic); | |
1da177e4 LT |
410 | |
411 | #ifndef VT_BUF_VRAM_ONLY | |
412 | /* | |
413 | * ++roman: I completely changed the attribute format for monochrome | |
414 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
415 | * adapter) format didn't allow the combination of certain effects. | |
416 | * Now the attribute is just a bit vector: | |
417 | * Bit 0..1: intensity (0..2) | |
418 | * Bit 2 : underline | |
419 | * Bit 3 : reverse | |
420 | * Bit 7 : blink | |
421 | */ | |
422 | { | |
c9e587ab | 423 | u8 a = _color; |
1da177e4 LT |
424 | if (!vc->vc_can_do_color) |
425 | return _intensity | | |
fa6ce9ab | 426 | (_italic ? 2 : 0) | |
1da177e4 LT |
427 | (_underline ? 4 : 0) | |
428 | (_reverse ? 8 : 0) | | |
429 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
430 | if (_italic) |
431 | a = (a & 0xF0) | vc->vc_itcolor; | |
432 | else if (_underline) | |
1da177e4 LT |
433 | a = (a & 0xf0) | vc->vc_ulcolor; |
434 | else if (_intensity == 0) | |
435 | a = (a & 0xf0) | vc->vc_ulcolor; | |
436 | if (_reverse) | |
437 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
438 | if (_blink) | |
439 | a ^= 0x80; | |
440 | if (_intensity == 2) | |
441 | a ^= 0x08; | |
442 | if (vc->vc_hi_font_mask == 0x100) | |
443 | a <<= 1; | |
444 | return a; | |
445 | } | |
446 | #else | |
447 | return 0; | |
448 | #endif | |
449 | } | |
450 | ||
451 | static void update_attr(struct vc_data *vc) | |
452 | { | |
fa6ce9ab JE |
453 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
454 | vc->vc_blink, vc->vc_underline, | |
455 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
456 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
1da177e4 LT |
457 | } |
458 | ||
459 | /* Note: inverting the screen twice should revert to the original state */ | |
460 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
461 | { | |
462 | unsigned short *p; | |
463 | ||
464 | WARN_CONSOLE_UNLOCKED(); | |
465 | ||
466 | count /= 2; | |
467 | p = screenpos(vc, offset, viewed); | |
468 | if (vc->vc_sw->con_invert_region) | |
469 | vc->vc_sw->con_invert_region(vc, p, count); | |
470 | #ifndef VT_BUF_VRAM_ONLY | |
471 | else { | |
472 | u16 *q = p; | |
473 | int cnt = count; | |
474 | u16 a; | |
475 | ||
476 | if (!vc->vc_can_do_color) { | |
477 | while (cnt--) { | |
478 | a = scr_readw(q); | |
479 | a ^= 0x0800; | |
480 | scr_writew(a, q); | |
481 | q++; | |
482 | } | |
483 | } else if (vc->vc_hi_font_mask == 0x100) { | |
484 | while (cnt--) { | |
485 | a = scr_readw(q); | |
486 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
487 | scr_writew(a, q); | |
488 | q++; | |
489 | } | |
490 | } else { | |
491 | while (cnt--) { | |
492 | a = scr_readw(q); | |
493 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
494 | scr_writew(a, q); | |
495 | q++; | |
496 | } | |
497 | } | |
498 | } | |
499 | #endif | |
500 | if (DO_UPDATE(vc)) | |
501 | do_update_region(vc, (unsigned long) p, count); | |
502 | } | |
503 | ||
504 | /* used by selection: complement pointer position */ | |
505 | void complement_pos(struct vc_data *vc, int offset) | |
506 | { | |
414edcd3 | 507 | static int old_offset = -1; |
1da177e4 LT |
508 | static unsigned short old; |
509 | static unsigned short oldx, oldy; | |
510 | ||
511 | WARN_CONSOLE_UNLOCKED(); | |
512 | ||
414edcd3 AD |
513 | if (old_offset != -1 && old_offset >= 0 && |
514 | old_offset < vc->vc_screenbuf_size) { | |
515 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
1da177e4 LT |
516 | if (DO_UPDATE(vc)) |
517 | vc->vc_sw->con_putc(vc, old, oldy, oldx); | |
518 | } | |
414edcd3 AD |
519 | |
520 | old_offset = offset; | |
521 | ||
522 | if (offset != -1 && offset >= 0 && | |
523 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 524 | unsigned short new; |
414edcd3 | 525 | unsigned short *p; |
1da177e4 LT |
526 | p = screenpos(vc, offset, 1); |
527 | old = scr_readw(p); | |
528 | new = old ^ vc->vc_complement_mask; | |
529 | scr_writew(new, p); | |
530 | if (DO_UPDATE(vc)) { | |
531 | oldx = (offset >> 1) % vc->vc_cols; | |
532 | oldy = (offset >> 1) / vc->vc_cols; | |
533 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
534 | } | |
535 | } | |
414edcd3 | 536 | |
1da177e4 LT |
537 | } |
538 | ||
539 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
540 | { | |
541 | unsigned short *p, *q = (unsigned short *)vc->vc_pos; | |
542 | ||
543 | p = q + vc->vc_cols - nr - vc->vc_x; | |
544 | while (--p >= q) | |
545 | scr_writew(scr_readw(p), p + nr); | |
546 | scr_memsetw(q, vc->vc_video_erase_char, nr * 2); | |
547 | vc->vc_need_wrap = 0; | |
548 | if (DO_UPDATE(vc)) { | |
549 | unsigned short oldattr = vc->vc_attr; | |
550 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, | |
551 | vc->vc_cols - vc->vc_x - nr); | |
552 | vc->vc_attr = vc->vc_video_erase_char >> 8; | |
553 | while (nr--) | |
554 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); | |
555 | vc->vc_attr = oldattr; | |
556 | } | |
557 | } | |
558 | ||
559 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
560 | { | |
561 | unsigned int i = vc->vc_x; | |
562 | unsigned short *p = (unsigned short *)vc->vc_pos; | |
563 | ||
564 | while (++i <= vc->vc_cols - nr) { | |
565 | scr_writew(scr_readw(p+nr), p); | |
566 | p++; | |
567 | } | |
568 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); | |
569 | vc->vc_need_wrap = 0; | |
570 | if (DO_UPDATE(vc)) { | |
571 | unsigned short oldattr = vc->vc_attr; | |
572 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, | |
573 | vc->vc_cols - vc->vc_x - nr); | |
574 | vc->vc_attr = vc->vc_video_erase_char >> 8; | |
575 | while (nr--) | |
576 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, | |
577 | vc->vc_cols - 1 - nr); | |
578 | vc->vc_attr = oldattr; | |
579 | } | |
580 | } | |
581 | ||
582 | static int softcursor_original; | |
583 | ||
584 | static void add_softcursor(struct vc_data *vc) | |
585 | { | |
586 | int i = scr_readw((u16 *) vc->vc_pos); | |
587 | u32 type = vc->vc_cursor_type; | |
588 | ||
589 | if (! (type & 0x10)) return; | |
590 | if (softcursor_original != -1) return; | |
591 | softcursor_original = i; | |
592 | i |= ((type >> 8) & 0xff00 ); | |
593 | i ^= ((type) & 0xff00 ); | |
594 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
595 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
596 | scr_writew(i, (u16 *) vc->vc_pos); | |
597 | if (DO_UPDATE(vc)) | |
598 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); | |
599 | } | |
600 | ||
601 | static void hide_softcursor(struct vc_data *vc) | |
602 | { | |
603 | if (softcursor_original != -1) { | |
604 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
605 | if (DO_UPDATE(vc)) | |
606 | vc->vc_sw->con_putc(vc, softcursor_original, | |
607 | vc->vc_y, vc->vc_x); | |
608 | softcursor_original = -1; | |
609 | } | |
610 | } | |
611 | ||
612 | static void hide_cursor(struct vc_data *vc) | |
613 | { | |
614 | if (vc == sel_cons) | |
615 | clear_selection(); | |
616 | vc->vc_sw->con_cursor(vc, CM_ERASE); | |
617 | hide_softcursor(vc); | |
618 | } | |
619 | ||
620 | static void set_cursor(struct vc_data *vc) | |
621 | { | |
622 | if (!IS_FG(vc) || console_blanked || | |
623 | vc->vc_mode == KD_GRAPHICS) | |
624 | return; | |
625 | if (vc->vc_deccm) { | |
626 | if (vc == sel_cons) | |
627 | clear_selection(); | |
628 | add_softcursor(vc); | |
629 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
630 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
631 | } else | |
632 | hide_cursor(vc); | |
633 | } | |
634 | ||
635 | static void set_origin(struct vc_data *vc) | |
636 | { | |
637 | WARN_CONSOLE_UNLOCKED(); | |
638 | ||
639 | if (!CON_IS_VISIBLE(vc) || | |
640 | !vc->vc_sw->con_set_origin || | |
641 | !vc->vc_sw->con_set_origin(vc)) | |
642 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
643 | vc->vc_visible_origin = vc->vc_origin; | |
644 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
645 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
646 | } | |
647 | ||
648 | static inline void save_screen(struct vc_data *vc) | |
649 | { | |
650 | WARN_CONSOLE_UNLOCKED(); | |
651 | ||
652 | if (vc->vc_sw->con_save_screen) | |
653 | vc->vc_sw->con_save_screen(vc); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Redrawing of screen | |
658 | */ | |
659 | ||
660 | static void clear_buffer_attributes(struct vc_data *vc) | |
661 | { | |
662 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
663 | int count = vc->vc_screenbuf_size / 2; | |
664 | int mask = vc->vc_hi_font_mask | 0xff; | |
665 | ||
666 | for (; count > 0; count--, p++) { | |
667 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
668 | } | |
669 | } | |
670 | ||
671 | void redraw_screen(struct vc_data *vc, int is_switch) | |
672 | { | |
673 | int redraw = 0; | |
674 | ||
675 | WARN_CONSOLE_UNLOCKED(); | |
676 | ||
677 | if (!vc) { | |
678 | /* strange ... */ | |
679 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
680 | return; | |
681 | } | |
682 | ||
683 | if (is_switch) { | |
684 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
685 | if (old_vc == vc) | |
686 | return; | |
687 | if (!CON_IS_VISIBLE(vc)) | |
688 | redraw = 1; | |
689 | *vc->vc_display_fg = vc; | |
690 | fg_console = vc->vc_num; | |
691 | hide_cursor(old_vc); | |
692 | if (!CON_IS_VISIBLE(old_vc)) { | |
693 | save_screen(old_vc); | |
694 | set_origin(old_vc); | |
695 | } | |
fbc92a34 KS |
696 | if (tty0dev) |
697 | sysfs_notify(&tty0dev->kobj, NULL, "active"); | |
1da177e4 LT |
698 | } else { |
699 | hide_cursor(vc); | |
700 | redraw = 1; | |
701 | } | |
702 | ||
703 | if (redraw) { | |
704 | int update; | |
705 | int old_was_color = vc->vc_can_do_color; | |
706 | ||
707 | set_origin(vc); | |
708 | update = vc->vc_sw->con_switch(vc); | |
709 | set_palette(vc); | |
710 | /* | |
711 | * If console changed from mono<->color, the best we can do | |
712 | * is to clear the buffer attributes. As it currently stands, | |
713 | * rebuilding new attributes from the old buffer is not doable | |
714 | * without overly complex code. | |
715 | */ | |
716 | if (old_was_color != vc->vc_can_do_color) { | |
717 | update_attr(vc); | |
718 | clear_buffer_attributes(vc); | |
719 | } | |
8fd4bd22 JB |
720 | |
721 | /* Forcibly update if we're panicing */ | |
722 | if ((update && vc->vc_mode != KD_GRAPHICS) || | |
723 | vt_force_oops_output(vc)) | |
1da177e4 LT |
724 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
725 | } | |
726 | set_cursor(vc); | |
727 | if (is_switch) { | |
728 | set_leds(); | |
729 | compute_shiftstate(); | |
8182ec49 | 730 | notify_update(vc); |
1da177e4 LT |
731 | } |
732 | } | |
733 | ||
734 | /* | |
735 | * Allocation, freeing and resizing of VTs. | |
736 | */ | |
737 | ||
738 | int vc_cons_allocated(unsigned int i) | |
739 | { | |
740 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
741 | } | |
742 | ||
743 | static void visual_init(struct vc_data *vc, int num, int init) | |
744 | { | |
745 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
746 | if (vc->vc_sw) | |
747 | module_put(vc->vc_sw->owner); | |
748 | vc->vc_sw = conswitchp; | |
749 | #ifndef VT_SINGLE_DRIVER | |
750 | if (con_driver_map[num]) | |
751 | vc->vc_sw = con_driver_map[num]; | |
752 | #endif | |
753 | __module_get(vc->vc_sw->owner); | |
754 | vc->vc_num = num; | |
755 | vc->vc_display_fg = &master_display_fg; | |
756 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; | |
757 | vc->vc_uni_pagedir = 0; | |
758 | vc->vc_hi_font_mask = 0; | |
759 | vc->vc_complement_mask = 0; | |
760 | vc->vc_can_do_color = 0; | |
8fd4bd22 | 761 | vc->vc_panic_force_write = false; |
1da177e4 LT |
762 | vc->vc_sw->con_init(vc, init); |
763 | if (!vc->vc_complement_mask) | |
764 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
765 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
766 | vc->vc_size_row = vc->vc_cols << 1; | |
767 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
768 | } | |
769 | ||
770 | int vc_allocate(unsigned int currcons) /* return 0 on success */ | |
771 | { | |
772 | WARN_CONSOLE_UNLOCKED(); | |
773 | ||
774 | if (currcons >= MAX_NR_CONSOLES) | |
775 | return -ENXIO; | |
776 | if (!vc_cons[currcons].d) { | |
777 | struct vc_data *vc; | |
b293d758 | 778 | struct vt_notifier_param param; |
1da177e4 LT |
779 | |
780 | /* prevent users from taking too much memory */ | |
781 | if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) | |
782 | return -EPERM; | |
783 | ||
784 | /* due to the granularity of kmalloc, we waste some memory here */ | |
785 | /* the alloc is done in two steps, to optimize the common situation | |
786 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
787 | /* although the numbers above are not valid since long ago, the | |
788 | point is still up-to-date and the comment still has its value | |
789 | even if only as a historical artifact. --mj, July 1998 */ | |
b293d758 | 790 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); |
1da177e4 LT |
791 | if (!vc) |
792 | return -ENOMEM; | |
1da177e4 | 793 | vc_cons[currcons].d = vc; |
ff917ba4 | 794 | tty_port_init(&vc->port); |
c2c88f10 | 795 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
1da177e4 LT |
796 | visual_init(vc, currcons, 1); |
797 | if (!*vc->vc_uni_pagedir_loc) | |
798 | con_set_default_unimap(vc); | |
5c9228f0 | 799 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
1da177e4 LT |
800 | if (!vc->vc_screenbuf) { |
801 | kfree(vc); | |
802 | vc_cons[currcons].d = NULL; | |
803 | return -ENOMEM; | |
804 | } | |
f6c06b68 MG |
805 | |
806 | /* If no drivers have overridden us and the user didn't pass a | |
807 | boot option, default to displaying the cursor */ | |
808 | if (global_cursor_default == -1) | |
809 | global_cursor_default = 1; | |
810 | ||
1da177e4 | 811 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); |
4995f8ef | 812 | vcs_make_sysfs(currcons); |
b293d758 | 813 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); |
1da177e4 LT |
814 | } |
815 | return 0; | |
816 | } | |
817 | ||
e400b6ec AD |
818 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
819 | int user) | |
1da177e4 LT |
820 | { |
821 | /* Resizes the resolution of the display adapater */ | |
822 | int err = 0; | |
823 | ||
824 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
825 | err = vc->vc_sw->con_resize(vc, width, height, user); |
826 | ||
1da177e4 LT |
827 | return err; |
828 | } | |
829 | ||
830 | /* | |
831 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
832 | * [this is to be used together with some user program | |
833 | * like resize that changes the hardware videomode] | |
834 | */ | |
835 | #define VC_RESIZE_MAXCOL (32767) | |
836 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
837 | |
838 | /** | |
839 | * vc_do_resize - resizing method for the tty | |
840 | * @tty: tty being resized | |
841 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
842 | * @vc: virtual console private data | |
843 | * @cols: columns | |
844 | * @lines: lines | |
845 | * | |
846 | * Resize a virtual console, clipping according to the actual constraints. | |
847 | * If the caller passes a tty structure then update the termios winsize | |
3ad2f3fb | 848 | * information and perform any necessary signal handling. |
8c9a9dd0 AC |
849 | * |
850 | * Caller must hold the console semaphore. Takes the termios mutex and | |
851 | * ctrl_lock of the tty IFF a tty is passed. | |
852 | */ | |
853 | ||
fc6f6238 AC |
854 | static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
855 | unsigned int cols, unsigned int lines) | |
1da177e4 LT |
856 | { |
857 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
9e0ba741 | 858 | unsigned long end; |
f2ee4ae8 | 859 | unsigned int old_rows, old_row_size; |
1da177e4 | 860 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
9e0ba741 | 861 | unsigned int user; |
1da177e4 LT |
862 | unsigned short *newscreen; |
863 | ||
864 | WARN_CONSOLE_UNLOCKED(); | |
865 | ||
866 | if (!vc) | |
867 | return -ENXIO; | |
868 | ||
e400b6ec AD |
869 | user = vc->vc_resize_user; |
870 | vc->vc_resize_user = 0; | |
871 | ||
1da177e4 LT |
872 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
873 | return -EINVAL; | |
874 | ||
875 | new_cols = (cols ? cols : vc->vc_cols); | |
876 | new_rows = (lines ? lines : vc->vc_rows); | |
877 | new_row_size = new_cols << 1; | |
878 | new_screen_size = new_row_size * new_rows; | |
879 | ||
880 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
881 | return 0; | |
882 | ||
5cbded58 | 883 | newscreen = kmalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
884 | if (!newscreen) |
885 | return -ENOMEM; | |
886 | ||
887 | old_rows = vc->vc_rows; | |
1da177e4 | 888 | old_row_size = vc->vc_size_row; |
1da177e4 | 889 | |
e400b6ec | 890 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
891 | if (err) { |
892 | kfree(newscreen); | |
893 | return err; | |
894 | } | |
895 | ||
896 | vc->vc_rows = new_rows; | |
897 | vc->vc_cols = new_cols; | |
898 | vc->vc_size_row = new_row_size; | |
899 | vc->vc_screenbuf_size = new_screen_size; | |
900 | ||
901 | rlth = min(old_row_size, new_row_size); | |
902 | rrem = new_row_size - rlth; | |
903 | old_origin = vc->vc_origin; | |
904 | new_origin = (long) newscreen; | |
905 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
906 | |
907 | if (vc->vc_y > new_rows) { | |
908 | if (old_rows - vc->vc_y < new_rows) { | |
909 | /* | |
910 | * Cursor near the bottom, copy contents from the | |
911 | * bottom of buffer | |
912 | */ | |
913 | old_origin += (old_rows - new_rows) * old_row_size; | |
3b41dc1a AD |
914 | } else { |
915 | /* | |
916 | * Cursor is in no man's land, copy 1/2 screenful | |
917 | * from the top and bottom of cursor position | |
918 | */ | |
919 | old_origin += (vc->vc_y - new_rows/2) * old_row_size; | |
3b41dc1a | 920 | } |
9fc2b2d0 FJ |
921 | } |
922 | ||
923 | end = old_origin + old_row_size * min(old_rows, new_rows); | |
1da177e4 LT |
924 | |
925 | update_attr(vc); | |
926 | ||
3b41dc1a AD |
927 | while (old_origin < end) { |
928 | scr_memcpyw((unsigned short *) new_origin, | |
929 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 930 | if (rrem) |
3b41dc1a AD |
931 | scr_memsetw((void *)(new_origin + rlth), |
932 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
933 | old_origin += old_row_size; |
934 | new_origin += new_row_size; | |
935 | } | |
936 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
937 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
938 | new_scr_end - new_origin); | |
5c9228f0 | 939 | kfree(vc->vc_screenbuf); |
1da177e4 | 940 | vc->vc_screenbuf = newscreen; |
1da177e4 LT |
941 | vc->vc_screenbuf_size = new_screen_size; |
942 | set_origin(vc); | |
943 | ||
944 | /* do part of a reset_terminal() */ | |
945 | vc->vc_top = 0; | |
946 | vc->vc_bottom = vc->vc_rows; | |
947 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
948 | save_cur(vc); | |
949 | ||
8c9a9dd0 AC |
950 | if (tty) { |
951 | /* Rewrite the requested winsize data with the actual | |
952 | resulting sizes */ | |
953 | struct winsize ws; | |
1da177e4 LT |
954 | memset(&ws, 0, sizeof(ws)); |
955 | ws.ws_row = vc->vc_rows; | |
956 | ws.ws_col = vc->vc_cols; | |
957 | ws.ws_ypixel = vc->vc_scan_lines; | |
fc6f6238 | 958 | tty_do_resize(tty, &ws); |
1da177e4 LT |
959 | } |
960 | ||
961 | if (CON_IS_VISIBLE(vc)) | |
962 | update_screen(vc); | |
8b92e87d | 963 | vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
1da177e4 LT |
964 | return err; |
965 | } | |
966 | ||
8c9a9dd0 AC |
967 | /** |
968 | * vc_resize - resize a VT | |
969 | * @vc: virtual console | |
970 | * @cols: columns | |
971 | * @rows: rows | |
972 | * | |
973 | * Resize a virtual console as seen from the console end of things. We | |
974 | * use the common vc_do_resize methods to update the structures. The | |
975 | * caller must hold the console sem to protect console internals and | |
8ce73264 | 976 | * vc->port.tty |
8c9a9dd0 AC |
977 | */ |
978 | ||
979 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
980 | { | |
8ce73264 | 981 | return vc_do_resize(vc->port.tty, vc, cols, rows); |
8c9a9dd0 AC |
982 | } |
983 | ||
984 | /** | |
985 | * vt_resize - resize a VT | |
986 | * @tty: tty to resize | |
8c9a9dd0 AC |
987 | * @ws: winsize attributes |
988 | * | |
989 | * Resize a virtual terminal. This is called by the tty layer as we | |
990 | * register our own handler for resizing. The mutual helper does all | |
991 | * the actual work. | |
992 | * | |
993 | * Takes the console sem and the called methods then take the tty | |
994 | * termios_mutex and the tty ctrl_lock in that order. | |
995 | */ | |
da2bdf9a | 996 | static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
ca9bda00 | 997 | { |
8c9a9dd0 AC |
998 | struct vc_data *vc = tty->driver_data; |
999 | int ret; | |
ca9bda00 | 1000 | |
ac751efa | 1001 | console_lock(); |
fc6f6238 | 1002 | ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
ac751efa | 1003 | console_unlock(); |
8c9a9dd0 | 1004 | return ret; |
ca9bda00 | 1005 | } |
1da177e4 | 1006 | |
ca9bda00 | 1007 | void vc_deallocate(unsigned int currcons) |
1da177e4 LT |
1008 | { |
1009 | WARN_CONSOLE_UNLOCKED(); | |
1010 | ||
1011 | if (vc_cons_allocated(currcons)) { | |
1012 | struct vc_data *vc = vc_cons[currcons].d; | |
b293d758 | 1013 | struct vt_notifier_param param = { .vc = vc }; |
4995f8ef | 1014 | |
b293d758 | 1015 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
4995f8ef | 1016 | vcs_remove_sysfs(currcons); |
1da177e4 | 1017 | vc->vc_sw->con_deinit(vc); |
bde0d2c9 | 1018 | put_pid(vc->vt_pid); |
d459ec0b | 1019 | module_put(vc->vc_sw->owner); |
5c9228f0 | 1020 | kfree(vc->vc_screenbuf); |
1da177e4 LT |
1021 | if (currcons >= MIN_NR_CONSOLES) |
1022 | kfree(vc); | |
1023 | vc_cons[currcons].d = NULL; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * VT102 emulator | |
1029 | */ | |
1030 | ||
079c9534 AC |
1031 | #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) |
1032 | #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) | |
1033 | #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) | |
1da177e4 LT |
1034 | |
1035 | #define decarm VC_REPEAT | |
1036 | #define decckm VC_CKMODE | |
1037 | #define kbdapplic VC_APPLIC | |
1038 | #define lnm VC_CRLF | |
1039 | ||
1040 | /* | |
1041 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1042 | */ | |
1043 | #define VT100ID "\033[?1;2c" | |
1044 | #define VT102ID "\033[?6c" | |
1045 | ||
1046 | unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, | |
1047 | 8,12,10,14, 9,13,11,15 }; | |
1048 | ||
1049 | /* the default colour table, for VGA+ colour systems */ | |
1050 | int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, | |
1051 | 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; | |
1052 | int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, | |
1053 | 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; | |
1054 | int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, | |
1055 | 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; | |
1056 | ||
1c2bbe6a JE |
1057 | module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); |
1058 | module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); | |
1059 | module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); | |
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 | ||
1102 | void scrollback(struct vc_data *vc, int lines) | |
1103 | { | |
1104 | if (!lines) | |
1105 | lines = vc->vc_rows / 2; | |
1106 | scrolldelta(-lines); | |
1107 | } | |
1108 | ||
1109 | void scrollfront(struct vc_data *vc, int lines) | |
1110 | { | |
1111 | if (!lines) | |
1112 | lines = vc->vc_rows / 2; | |
1113 | scrolldelta(lines); | |
1114 | } | |
1115 | ||
1116 | static void lf(struct vc_data *vc) | |
1117 | { | |
1118 | /* don't scroll if above bottom of scrolling region, or | |
1119 | * if below scrolling region | |
1120 | */ | |
1121 | if (vc->vc_y + 1 == vc->vc_bottom) | |
1122 | scrup(vc, vc->vc_top, vc->vc_bottom, 1); | |
1123 | else if (vc->vc_y < vc->vc_rows - 1) { | |
1124 | vc->vc_y++; | |
1125 | vc->vc_pos += vc->vc_size_row; | |
1126 | } | |
1127 | vc->vc_need_wrap = 0; | |
b293d758 | 1128 | notify_write(vc, '\n'); |
1da177e4 LT |
1129 | } |
1130 | ||
1131 | static void ri(struct vc_data *vc) | |
1132 | { | |
1133 | /* don't scroll if below top of scrolling region, or | |
1134 | * if above scrolling region | |
1135 | */ | |
1136 | if (vc->vc_y == vc->vc_top) | |
1137 | scrdown(vc, vc->vc_top, vc->vc_bottom, 1); | |
1138 | else if (vc->vc_y > 0) { | |
1139 | vc->vc_y--; | |
1140 | vc->vc_pos -= vc->vc_size_row; | |
1141 | } | |
1142 | vc->vc_need_wrap = 0; | |
1143 | } | |
1144 | ||
1145 | static inline void cr(struct vc_data *vc) | |
1146 | { | |
1147 | vc->vc_pos -= vc->vc_x << 1; | |
1148 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1149 | notify_write(vc, '\r'); |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | static inline void bs(struct vc_data *vc) | |
1153 | { | |
1154 | if (vc->vc_x) { | |
1155 | vc->vc_pos -= 2; | |
1156 | vc->vc_x--; | |
1157 | vc->vc_need_wrap = 0; | |
b293d758 | 1158 | notify_write(vc, '\b'); |
1da177e4 LT |
1159 | } |
1160 | } | |
1161 | ||
1162 | static inline void del(struct vc_data *vc) | |
1163 | { | |
1164 | /* ignored */ | |
1165 | } | |
1166 | ||
1167 | static void csi_J(struct vc_data *vc, int vpar) | |
1168 | { | |
1169 | unsigned int count; | |
1170 | unsigned short * start; | |
1171 | ||
1172 | switch (vpar) { | |
1173 | case 0: /* erase from cursor to end of display */ | |
1174 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; | |
1175 | start = (unsigned short *)vc->vc_pos; | |
1176 | if (DO_UPDATE(vc)) { | |
1177 | /* do in two stages */ | |
1178 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1179 | vc->vc_cols - vc->vc_x); | |
1180 | vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, | |
1181 | vc->vc_rows - vc->vc_y - 1, | |
1182 | vc->vc_cols); | |
1183 | } | |
1184 | break; | |
1185 | case 1: /* erase from start to cursor */ | |
1186 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; | |
1187 | start = (unsigned short *)vc->vc_origin; | |
1188 | if (DO_UPDATE(vc)) { | |
1189 | /* do in two stages */ | |
1190 | vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, | |
1191 | vc->vc_cols); | |
1192 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1193 | vc->vc_x + 1); | |
1194 | } | |
1195 | break; | |
f8df13e0 PP |
1196 | case 3: /* erase scroll-back buffer (and whole display) */ |
1197 | scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, | |
1198 | vc->vc_screenbuf_size >> 1); | |
1199 | set_origin(vc); | |
1200 | if (CON_IS_VISIBLE(vc)) | |
1201 | update_screen(vc); | |
1202 | /* fall through */ | |
1da177e4 LT |
1203 | case 2: /* erase whole display */ |
1204 | count = vc->vc_cols * vc->vc_rows; | |
1205 | start = (unsigned short *)vc->vc_origin; | |
1206 | if (DO_UPDATE(vc)) | |
1207 | vc->vc_sw->con_clear(vc, 0, 0, | |
1208 | vc->vc_rows, | |
1209 | vc->vc_cols); | |
1210 | break; | |
1211 | default: | |
1212 | return; | |
1213 | } | |
1214 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1215 | vc->vc_need_wrap = 0; | |
1216 | } | |
1217 | ||
1218 | static void csi_K(struct vc_data *vc, int vpar) | |
1219 | { | |
1220 | unsigned int count; | |
1221 | unsigned short * start; | |
1222 | ||
1223 | switch (vpar) { | |
1224 | case 0: /* erase from cursor to end of line */ | |
1225 | count = vc->vc_cols - vc->vc_x; | |
1226 | start = (unsigned short *)vc->vc_pos; | |
1227 | if (DO_UPDATE(vc)) | |
1228 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1229 | vc->vc_cols - vc->vc_x); | |
1230 | break; | |
1231 | case 1: /* erase from start of line to cursor */ | |
1232 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1233 | count = vc->vc_x + 1; | |
1234 | if (DO_UPDATE(vc)) | |
1235 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1236 | vc->vc_x + 1); | |
1237 | break; | |
1238 | case 2: /* erase whole line */ | |
1239 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1240 | count = vc->vc_cols; | |
1241 | if (DO_UPDATE(vc)) | |
1242 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1243 | vc->vc_cols); | |
1244 | break; | |
1245 | default: | |
1246 | return; | |
1247 | } | |
1248 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1249 | vc->vc_need_wrap = 0; | |
1250 | } | |
1251 | ||
1252 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1253 | { /* not vt100? */ | |
1254 | int count; | |
1255 | ||
1256 | if (!vpar) | |
1257 | vpar++; | |
1258 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1259 | ||
1260 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); | |
1261 | if (DO_UPDATE(vc)) | |
1262 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); | |
1263 | vc->vc_need_wrap = 0; | |
1264 | } | |
1265 | ||
1266 | static void default_attr(struct vc_data *vc) | |
1267 | { | |
1268 | vc->vc_intensity = 1; | |
fa6ce9ab | 1269 | vc->vc_italic = 0; |
1da177e4 LT |
1270 | vc->vc_underline = 0; |
1271 | vc->vc_reverse = 0; | |
1272 | vc->vc_blink = 0; | |
1273 | vc->vc_color = vc->vc_def_color; | |
1274 | } | |
1275 | ||
ac751efa | 1276 | /* console_lock is held */ |
1da177e4 LT |
1277 | static void csi_m(struct vc_data *vc) |
1278 | { | |
1279 | int i; | |
1280 | ||
1281 | for (i = 0; i <= vc->vc_npar; i++) | |
1282 | switch (vc->vc_par[i]) { | |
1283 | case 0: /* all attributes off */ | |
1284 | default_attr(vc); | |
1285 | break; | |
1286 | case 1: | |
1287 | vc->vc_intensity = 2; | |
1288 | break; | |
1289 | case 2: | |
1290 | vc->vc_intensity = 0; | |
1291 | break; | |
fa6ce9ab JE |
1292 | case 3: |
1293 | vc->vc_italic = 1; | |
1294 | break; | |
1da177e4 LT |
1295 | case 4: |
1296 | vc->vc_underline = 1; | |
1297 | break; | |
1298 | case 5: | |
1299 | vc->vc_blink = 1; | |
1300 | break; | |
1301 | case 7: | |
1302 | vc->vc_reverse = 1; | |
1303 | break; | |
1304 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1305 | * Select primary font, don't display | |
1306 | * control chars if defined, don't set | |
1307 | * bit 8 on output. | |
1308 | */ | |
1309 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1310 | ? vc->vc_G0_charset | |
1311 | : vc->vc_G1_charset, vc); | |
1312 | vc->vc_disp_ctrl = 0; | |
1313 | vc->vc_toggle_meta = 0; | |
1314 | break; | |
1315 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1316 | * Select first alternate font, lets | |
1317 | * chars < 32 be displayed as ROM chars. | |
1318 | */ | |
1319 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1320 | vc->vc_disp_ctrl = 1; | |
1321 | vc->vc_toggle_meta = 0; | |
1322 | break; | |
1323 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1324 | * Select second alternate font, toggle | |
1325 | * high bit before displaying as ROM char. | |
1326 | */ | |
1327 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1328 | vc->vc_disp_ctrl = 1; | |
1329 | vc->vc_toggle_meta = 1; | |
1330 | break; | |
1331 | case 21: | |
1332 | case 22: | |
1333 | vc->vc_intensity = 1; | |
1334 | break; | |
fa6ce9ab JE |
1335 | case 23: |
1336 | vc->vc_italic = 0; | |
1337 | break; | |
1da177e4 LT |
1338 | case 24: |
1339 | vc->vc_underline = 0; | |
1340 | break; | |
1341 | case 25: | |
1342 | vc->vc_blink = 0; | |
1343 | break; | |
1344 | case 27: | |
1345 | vc->vc_reverse = 0; | |
1346 | break; | |
1347 | case 38: /* ANSI X3.64-1979 (SCO-ish?) | |
1348 | * Enables underscore, white foreground | |
1349 | * with white underscore (Linux - use | |
1350 | * default foreground). | |
1351 | */ | |
1352 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1353 | vc->vc_underline = 1; | |
1354 | break; | |
1355 | case 39: /* ANSI X3.64-1979 (SCO-ish?) | |
1356 | * Disable underline option. | |
1357 | * Reset colour to default? It did this | |
1358 | * before... | |
1359 | */ | |
1360 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1361 | vc->vc_underline = 0; | |
1362 | break; | |
1363 | case 49: | |
1364 | vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); | |
1365 | break; | |
1366 | default: | |
1367 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) | |
1368 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1369 | | (vc->vc_color & 0xf0); | |
1370 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1371 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1372 | | (vc->vc_color & 0x0f); | |
1373 | break; | |
1374 | } | |
1375 | update_attr(vc); | |
1376 | } | |
1377 | ||
1378 | static void respond_string(const char *p, struct tty_struct *tty) | |
1379 | { | |
1380 | while (*p) { | |
1381 | tty_insert_flip_char(tty, *p, 0); | |
1382 | p++; | |
1383 | } | |
1384 | con_schedule_flip(tty); | |
1385 | } | |
1386 | ||
1387 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1388 | { | |
1389 | char buf[40]; | |
1390 | ||
1391 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
1392 | respond_string(buf, tty); | |
1393 | } | |
1394 | ||
1395 | static inline void status_report(struct tty_struct *tty) | |
1396 | { | |
1397 | respond_string("\033[0n", tty); /* Terminal ok */ | |
1398 | } | |
1399 | ||
1400 | static inline void respond_ID(struct tty_struct * tty) | |
1401 | { | |
1402 | respond_string(VT102ID, tty); | |
1403 | } | |
1404 | ||
1405 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1406 | { | |
1407 | char buf[8]; | |
1408 | ||
1409 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1410 | (char)('!' + mry)); | |
1411 | respond_string(buf, tty); | |
1412 | } | |
1413 | ||
1414 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ | |
1415 | int mouse_reporting(void) | |
1416 | { | |
1417 | return vc_cons[fg_console].d->vc_report_mouse; | |
1418 | } | |
1419 | ||
ac751efa | 1420 | /* console_lock is held */ |
1da177e4 LT |
1421 | static void set_mode(struct vc_data *vc, int on_off) |
1422 | { | |
1423 | int i; | |
1424 | ||
1425 | for (i = 0; i <= vc->vc_npar; i++) | |
1426 | if (vc->vc_ques) { | |
1427 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ | |
1428 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1429 | if (on_off) | |
1430 | set_kbd(vc, decckm); | |
1431 | else | |
1432 | clr_kbd(vc, decckm); | |
1433 | break; | |
1434 | case 3: /* 80/132 mode switch unimplemented */ | |
1435 | vc->vc_deccolm = on_off; | |
1436 | #if 0 | |
1437 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1438 | /* this alone does not suffice; some user mode | |
1439 | utility has to change the hardware regs */ | |
1440 | #endif | |
1441 | break; | |
1442 | case 5: /* Inverted screen on/off */ | |
1443 | if (vc->vc_decscnm != on_off) { | |
1444 | vc->vc_decscnm = on_off; | |
1445 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1446 | update_attr(vc); | |
1447 | } | |
1448 | break; | |
1449 | case 6: /* Origin relative/absolute */ | |
1450 | vc->vc_decom = on_off; | |
1451 | gotoxay(vc, 0, 0); | |
1452 | break; | |
1453 | case 7: /* Autowrap on/off */ | |
1454 | vc->vc_decawm = on_off; | |
1455 | break; | |
1456 | case 8: /* Autorepeat on/off */ | |
1457 | if (on_off) | |
1458 | set_kbd(vc, decarm); | |
1459 | else | |
1460 | clr_kbd(vc, decarm); | |
1461 | break; | |
1462 | case 9: | |
1463 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1464 | break; | |
1465 | case 25: /* Cursor on/off */ | |
1466 | vc->vc_deccm = on_off; | |
1467 | break; | |
1468 | case 1000: | |
1469 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1470 | break; | |
1471 | } | |
1472 | } else { | |
1473 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1474 | case 3: /* Monitor (display ctrls) */ | |
1475 | vc->vc_disp_ctrl = on_off; | |
1476 | break; | |
1477 | case 4: /* Insert Mode on/off */ | |
1478 | vc->vc_decim = on_off; | |
1479 | break; | |
1480 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1481 | if (on_off) | |
1482 | set_kbd(vc, lnm); | |
1483 | else | |
1484 | clr_kbd(vc, lnm); | |
1485 | break; | |
1486 | } | |
1487 | } | |
1488 | } | |
1489 | ||
ac751efa | 1490 | /* console_lock is held */ |
1da177e4 LT |
1491 | static void setterm_command(struct vc_data *vc) |
1492 | { | |
1493 | switch(vc->vc_par[0]) { | |
1494 | case 1: /* set color for underline mode */ | |
1495 | if (vc->vc_can_do_color && | |
1496 | vc->vc_par[1] < 16) { | |
1497 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1498 | if (vc->vc_underline) | |
1499 | update_attr(vc); | |
1500 | } | |
1501 | break; | |
1502 | case 2: /* set color for half intensity mode */ | |
1503 | if (vc->vc_can_do_color && | |
1504 | vc->vc_par[1] < 16) { | |
1505 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1506 | if (vc->vc_intensity == 0) | |
1507 | update_attr(vc); | |
1508 | } | |
1509 | break; | |
1510 | case 8: /* store colors as defaults */ | |
1511 | vc->vc_def_color = vc->vc_attr; | |
1512 | if (vc->vc_hi_font_mask == 0x100) | |
1513 | vc->vc_def_color >>= 1; | |
1514 | default_attr(vc); | |
1515 | update_attr(vc); | |
1516 | break; | |
1517 | case 9: /* set blanking interval */ | |
f324edc8 | 1518 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; |
1da177e4 LT |
1519 | poke_blanked_console(); |
1520 | break; | |
1521 | case 10: /* set bell frequency in Hz */ | |
1522 | if (vc->vc_npar >= 1) | |
1523 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1524 | else | |
1525 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1526 | break; | |
1527 | case 11: /* set bell duration in msec */ | |
1528 | if (vc->vc_npar >= 1) | |
1529 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
1530 | vc->vc_par[1] * HZ / 1000 : 0; | |
1531 | else | |
1532 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1533 | break; | |
1534 | case 12: /* bring specified console to the front */ | |
1535 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1536 | set_console(vc->vc_par[1] - 1); | |
1537 | break; | |
1538 | case 13: /* unblank the screen */ | |
1539 | poke_blanked_console(); | |
1540 | break; | |
1541 | case 14: /* set vesa powerdown interval */ | |
1542 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1543 | break; | |
1544 | case 15: /* activate the previous console */ | |
1545 | set_console(last_console); | |
1546 | break; | |
1547 | } | |
1548 | } | |
1549 | ||
ac751efa | 1550 | /* console_lock is held */ |
1da177e4 LT |
1551 | static void csi_at(struct vc_data *vc, unsigned int nr) |
1552 | { | |
1553 | if (nr > vc->vc_cols - vc->vc_x) | |
1554 | nr = vc->vc_cols - vc->vc_x; | |
1555 | else if (!nr) | |
1556 | nr = 1; | |
1557 | insert_char(vc, nr); | |
1558 | } | |
1559 | ||
ac751efa | 1560 | /* console_lock is held */ |
1da177e4 LT |
1561 | static void csi_L(struct vc_data *vc, unsigned int nr) |
1562 | { | |
1563 | if (nr > vc->vc_rows - vc->vc_y) | |
1564 | nr = vc->vc_rows - vc->vc_y; | |
1565 | else if (!nr) | |
1566 | nr = 1; | |
1567 | scrdown(vc, vc->vc_y, vc->vc_bottom, nr); | |
1568 | vc->vc_need_wrap = 0; | |
1569 | } | |
1570 | ||
ac751efa | 1571 | /* console_lock is held */ |
1da177e4 LT |
1572 | static void csi_P(struct vc_data *vc, unsigned int nr) |
1573 | { | |
1574 | if (nr > vc->vc_cols - vc->vc_x) | |
1575 | nr = vc->vc_cols - vc->vc_x; | |
1576 | else if (!nr) | |
1577 | nr = 1; | |
1578 | delete_char(vc, nr); | |
1579 | } | |
1580 | ||
ac751efa | 1581 | /* console_lock is held */ |
1da177e4 LT |
1582 | static void csi_M(struct vc_data *vc, unsigned int nr) |
1583 | { | |
1584 | if (nr > vc->vc_rows - vc->vc_y) | |
1585 | nr = vc->vc_rows - vc->vc_y; | |
1586 | else if (!nr) | |
1587 | nr=1; | |
1588 | scrup(vc, vc->vc_y, vc->vc_bottom, nr); | |
1589 | vc->vc_need_wrap = 0; | |
1590 | } | |
1591 | ||
ac751efa | 1592 | /* console_lock is held (except via vc_init->reset_terminal */ |
1da177e4 LT |
1593 | static void save_cur(struct vc_data *vc) |
1594 | { | |
1595 | vc->vc_saved_x = vc->vc_x; | |
1596 | vc->vc_saved_y = vc->vc_y; | |
1597 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 1598 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
1599 | vc->vc_s_underline = vc->vc_underline; |
1600 | vc->vc_s_blink = vc->vc_blink; | |
1601 | vc->vc_s_reverse = vc->vc_reverse; | |
1602 | vc->vc_s_charset = vc->vc_charset; | |
1603 | vc->vc_s_color = vc->vc_color; | |
1604 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
1605 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
1606 | } | |
1607 | ||
ac751efa | 1608 | /* console_lock is held */ |
1da177e4 LT |
1609 | static void restore_cur(struct vc_data *vc) |
1610 | { | |
1611 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
1612 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 1613 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
1614 | vc->vc_underline = vc->vc_s_underline; |
1615 | vc->vc_blink = vc->vc_s_blink; | |
1616 | vc->vc_reverse = vc->vc_s_reverse; | |
1617 | vc->vc_charset = vc->vc_s_charset; | |
1618 | vc->vc_color = vc->vc_s_color; | |
1619 | vc->vc_G0_charset = vc->vc_saved_G0; | |
1620 | vc->vc_G1_charset = vc->vc_saved_G1; | |
1621 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
1622 | update_attr(vc); | |
1623 | vc->vc_need_wrap = 0; | |
1624 | } | |
1625 | ||
1626 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, | |
1627 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, | |
1628 | ESpalette }; | |
1629 | ||
ac751efa | 1630 | /* console_lock is held (except via vc_init()) */ |
1da177e4 LT |
1631 | static void reset_terminal(struct vc_data *vc, int do_clear) |
1632 | { | |
1633 | vc->vc_top = 0; | |
1634 | vc->vc_bottom = vc->vc_rows; | |
1635 | vc->vc_state = ESnormal; | |
1636 | vc->vc_ques = 0; | |
1637 | vc->vc_translate = set_translate(LAT1_MAP, vc); | |
1638 | vc->vc_G0_charset = LAT1_MAP; | |
1639 | vc->vc_G1_charset = GRAF_MAP; | |
1640 | vc->vc_charset = 0; | |
1641 | vc->vc_need_wrap = 0; | |
1642 | vc->vc_report_mouse = 0; | |
042f10ec | 1643 | vc->vc_utf = default_utf8; |
1da177e4 LT |
1644 | vc->vc_utf_count = 0; |
1645 | ||
1646 | vc->vc_disp_ctrl = 0; | |
1647 | vc->vc_toggle_meta = 0; | |
1648 | ||
1649 | vc->vc_decscnm = 0; | |
1650 | vc->vc_decom = 0; | |
1651 | vc->vc_decawm = 1; | |
f6c06b68 | 1652 | vc->vc_deccm = global_cursor_default; |
1da177e4 LT |
1653 | vc->vc_decim = 0; |
1654 | ||
079c9534 | 1655 | vt_reset_keyboard(vc->vc_num); |
1da177e4 | 1656 | |
9ea9a886 | 1657 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1658 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1659 | ||
1660 | default_attr(vc); | |
1661 | update_attr(vc); | |
1662 | ||
1663 | vc->vc_tab_stop[0] = 0x01010100; | |
1664 | vc->vc_tab_stop[1] = | |
1665 | vc->vc_tab_stop[2] = | |
1666 | vc->vc_tab_stop[3] = | |
a564738c WK |
1667 | vc->vc_tab_stop[4] = |
1668 | vc->vc_tab_stop[5] = | |
1669 | vc->vc_tab_stop[6] = | |
1670 | vc->vc_tab_stop[7] = 0x01010101; | |
1da177e4 LT |
1671 | |
1672 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1673 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1674 | ||
1675 | gotoxy(vc, 0, 0); | |
1676 | save_cur(vc); | |
1677 | if (do_clear) | |
1678 | csi_J(vc, 2); | |
1679 | } | |
1680 | ||
ac751efa | 1681 | /* console_lock is held */ |
1da177e4 LT |
1682 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
1683 | { | |
1684 | /* | |
1685 | * Control characters can be used in the _middle_ | |
1686 | * of an escape sequence. | |
1687 | */ | |
1688 | switch (c) { | |
1689 | case 0: | |
1690 | return; | |
1691 | case 7: | |
1692 | if (vc->vc_bell_duration) | |
1693 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); | |
1694 | return; | |
1695 | case 8: | |
1696 | bs(vc); | |
1697 | return; | |
1698 | case 9: | |
1699 | vc->vc_pos -= (vc->vc_x << 1); | |
1700 | while (vc->vc_x < vc->vc_cols - 1) { | |
1701 | vc->vc_x++; | |
1702 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) | |
1703 | break; | |
1704 | } | |
1705 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 1706 | notify_write(vc, '\t'); |
1da177e4 LT |
1707 | return; |
1708 | case 10: case 11: case 12: | |
1709 | lf(vc); | |
1710 | if (!is_kbd(vc, lnm)) | |
1711 | return; | |
1712 | case 13: | |
1713 | cr(vc); | |
1714 | return; | |
1715 | case 14: | |
1716 | vc->vc_charset = 1; | |
1717 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
1718 | vc->vc_disp_ctrl = 1; | |
1719 | return; | |
1720 | case 15: | |
1721 | vc->vc_charset = 0; | |
1722 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
1723 | vc->vc_disp_ctrl = 0; | |
1724 | return; | |
1725 | case 24: case 26: | |
1726 | vc->vc_state = ESnormal; | |
1727 | return; | |
1728 | case 27: | |
1729 | vc->vc_state = ESesc; | |
1730 | return; | |
1731 | case 127: | |
1732 | del(vc); | |
1733 | return; | |
1734 | case 128+27: | |
1735 | vc->vc_state = ESsquare; | |
1736 | return; | |
1737 | } | |
1738 | switch(vc->vc_state) { | |
1739 | case ESesc: | |
1740 | vc->vc_state = ESnormal; | |
1741 | switch (c) { | |
1742 | case '[': | |
1743 | vc->vc_state = ESsquare; | |
1744 | return; | |
1745 | case ']': | |
1746 | vc->vc_state = ESnonstd; | |
1747 | return; | |
1748 | case '%': | |
1749 | vc->vc_state = ESpercent; | |
1750 | return; | |
1751 | case 'E': | |
1752 | cr(vc); | |
1753 | lf(vc); | |
1754 | return; | |
1755 | case 'M': | |
1756 | ri(vc); | |
1757 | return; | |
1758 | case 'D': | |
1759 | lf(vc); | |
1760 | return; | |
1761 | case 'H': | |
1762 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); | |
1763 | return; | |
1764 | case 'Z': | |
1765 | respond_ID(tty); | |
1766 | return; | |
1767 | case '7': | |
1768 | save_cur(vc); | |
1769 | return; | |
1770 | case '8': | |
1771 | restore_cur(vc); | |
1772 | return; | |
1773 | case '(': | |
1774 | vc->vc_state = ESsetG0; | |
1775 | return; | |
1776 | case ')': | |
1777 | vc->vc_state = ESsetG1; | |
1778 | return; | |
1779 | case '#': | |
1780 | vc->vc_state = EShash; | |
1781 | return; | |
1782 | case 'c': | |
1783 | reset_terminal(vc, 1); | |
1784 | return; | |
1785 | case '>': /* Numeric keypad */ | |
1786 | clr_kbd(vc, kbdapplic); | |
1787 | return; | |
1788 | case '=': /* Appl. keypad */ | |
1789 | set_kbd(vc, kbdapplic); | |
1790 | return; | |
1791 | } | |
1792 | return; | |
1793 | case ESnonstd: | |
1794 | if (c=='P') { /* palette escape sequence */ | |
1795 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1796 | vc->vc_par[vc->vc_npar] = 0; | |
1797 | vc->vc_npar = 0; | |
1798 | vc->vc_state = ESpalette; | |
1799 | return; | |
1800 | } else if (c=='R') { /* reset palette */ | |
1801 | reset_palette(vc); | |
1802 | vc->vc_state = ESnormal; | |
1803 | } else | |
1804 | vc->vc_state = ESnormal; | |
1805 | return; | |
1806 | case ESpalette: | |
74c807ce AS |
1807 | if (isxdigit(c)) { |
1808 | vc->vc_par[vc->vc_npar++] = hex_to_bin(c); | |
1da177e4 LT |
1809 | if (vc->vc_npar == 7) { |
1810 | int i = vc->vc_par[0] * 3, j = 1; | |
1811 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1812 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1813 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1814 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1815 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1816 | vc->vc_palette[i] += vc->vc_par[j]; | |
1817 | set_palette(vc); | |
1818 | vc->vc_state = ESnormal; | |
1819 | } | |
1820 | } else | |
1821 | vc->vc_state = ESnormal; | |
1822 | return; | |
1823 | case ESsquare: | |
1824 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1825 | vc->vc_par[vc->vc_npar] = 0; | |
1826 | vc->vc_npar = 0; | |
1827 | vc->vc_state = ESgetpars; | |
1828 | if (c == '[') { /* Function key */ | |
1829 | vc->vc_state=ESfunckey; | |
1830 | return; | |
1831 | } | |
1832 | vc->vc_ques = (c == '?'); | |
1833 | if (vc->vc_ques) | |
1834 | return; | |
1835 | case ESgetpars: | |
1836 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
1837 | vc->vc_npar++; | |
1838 | return; | |
1839 | } else if (c>='0' && c<='9') { | |
1840 | vc->vc_par[vc->vc_npar] *= 10; | |
1841 | vc->vc_par[vc->vc_npar] += c - '0'; | |
1842 | return; | |
1843 | } else | |
1844 | vc->vc_state = ESgotpars; | |
1845 | case ESgotpars: | |
1846 | vc->vc_state = ESnormal; | |
1847 | switch(c) { | |
1848 | case 'h': | |
1849 | set_mode(vc, 1); | |
1850 | return; | |
1851 | case 'l': | |
1852 | set_mode(vc, 0); | |
1853 | return; | |
1854 | case 'c': | |
1855 | if (vc->vc_ques) { | |
1856 | if (vc->vc_par[0]) | |
1857 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
1858 | else | |
9ea9a886 | 1859 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
1860 | return; |
1861 | } | |
1862 | break; | |
1863 | case 'm': | |
1864 | if (vc->vc_ques) { | |
1865 | clear_selection(); | |
1866 | if (vc->vc_par[0]) | |
1867 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
1868 | else | |
1869 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1870 | return; | |
1871 | } | |
1872 | break; | |
1873 | case 'n': | |
1874 | if (!vc->vc_ques) { | |
1875 | if (vc->vc_par[0] == 5) | |
1876 | status_report(tty); | |
1877 | else if (vc->vc_par[0] == 6) | |
1878 | cursor_report(vc, tty); | |
1879 | } | |
1880 | return; | |
1881 | } | |
1882 | if (vc->vc_ques) { | |
1883 | vc->vc_ques = 0; | |
1884 | return; | |
1885 | } | |
1886 | switch(c) { | |
1887 | case 'G': case '`': | |
1888 | if (vc->vc_par[0]) | |
1889 | vc->vc_par[0]--; | |
1890 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
1891 | return; | |
1892 | case 'A': | |
1893 | if (!vc->vc_par[0]) | |
1894 | vc->vc_par[0]++; | |
1895 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
1896 | return; | |
1897 | case 'B': case 'e': | |
1898 | if (!vc->vc_par[0]) | |
1899 | vc->vc_par[0]++; | |
1900 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
1901 | return; | |
1902 | case 'C': case 'a': | |
1903 | if (!vc->vc_par[0]) | |
1904 | vc->vc_par[0]++; | |
1905 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
1906 | return; | |
1907 | case 'D': | |
1908 | if (!vc->vc_par[0]) | |
1909 | vc->vc_par[0]++; | |
1910 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
1911 | return; | |
1912 | case 'E': | |
1913 | if (!vc->vc_par[0]) | |
1914 | vc->vc_par[0]++; | |
1915 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
1916 | return; | |
1917 | case 'F': | |
1918 | if (!vc->vc_par[0]) | |
1919 | vc->vc_par[0]++; | |
1920 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
1921 | return; | |
1922 | case 'd': | |
1923 | if (vc->vc_par[0]) | |
1924 | vc->vc_par[0]--; | |
1925 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
1926 | return; | |
1927 | case 'H': case 'f': | |
1928 | if (vc->vc_par[0]) | |
1929 | vc->vc_par[0]--; | |
1930 | if (vc->vc_par[1]) | |
1931 | vc->vc_par[1]--; | |
1932 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
1933 | return; | |
1934 | case 'J': | |
1935 | csi_J(vc, vc->vc_par[0]); | |
1936 | return; | |
1937 | case 'K': | |
1938 | csi_K(vc, vc->vc_par[0]); | |
1939 | return; | |
1940 | case 'L': | |
1941 | csi_L(vc, vc->vc_par[0]); | |
1942 | return; | |
1943 | case 'M': | |
1944 | csi_M(vc, vc->vc_par[0]); | |
1945 | return; | |
1946 | case 'P': | |
1947 | csi_P(vc, vc->vc_par[0]); | |
1948 | return; | |
1949 | case 'c': | |
1950 | if (!vc->vc_par[0]) | |
1951 | respond_ID(tty); | |
1952 | return; | |
1953 | case 'g': | |
1954 | if (!vc->vc_par[0]) | |
1955 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); | |
1956 | else if (vc->vc_par[0] == 3) { | |
1957 | vc->vc_tab_stop[0] = | |
1958 | vc->vc_tab_stop[1] = | |
1959 | vc->vc_tab_stop[2] = | |
1960 | vc->vc_tab_stop[3] = | |
a564738c WK |
1961 | vc->vc_tab_stop[4] = |
1962 | vc->vc_tab_stop[5] = | |
1963 | vc->vc_tab_stop[6] = | |
1964 | vc->vc_tab_stop[7] = 0; | |
1da177e4 LT |
1965 | } |
1966 | return; | |
1967 | case 'm': | |
1968 | csi_m(vc); | |
1969 | return; | |
1970 | case 'q': /* DECLL - but only 3 leds */ | |
1971 | /* map 0,1,2,3 to 0,1,2,4 */ | |
1972 | if (vc->vc_par[0] < 4) | |
079c9534 | 1973 | vt_set_led_state(vc->vc_num, |
1da177e4 LT |
1974 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
1975 | return; | |
1976 | case 'r': | |
1977 | if (!vc->vc_par[0]) | |
1978 | vc->vc_par[0]++; | |
1979 | if (!vc->vc_par[1]) | |
1980 | vc->vc_par[1] = vc->vc_rows; | |
1981 | /* Minimum allowed region is 2 lines */ | |
1982 | if (vc->vc_par[0] < vc->vc_par[1] && | |
1983 | vc->vc_par[1] <= vc->vc_rows) { | |
1984 | vc->vc_top = vc->vc_par[0] - 1; | |
1985 | vc->vc_bottom = vc->vc_par[1]; | |
1986 | gotoxay(vc, 0, 0); | |
1987 | } | |
1988 | return; | |
1989 | case 's': | |
1990 | save_cur(vc); | |
1991 | return; | |
1992 | case 'u': | |
1993 | restore_cur(vc); | |
1994 | return; | |
1995 | case 'X': | |
1996 | csi_X(vc, vc->vc_par[0]); | |
1997 | return; | |
1998 | case '@': | |
1999 | csi_at(vc, vc->vc_par[0]); | |
2000 | return; | |
2001 | case ']': /* setterm functions */ | |
2002 | setterm_command(vc); | |
2003 | return; | |
2004 | } | |
2005 | return; | |
2006 | case ESpercent: | |
2007 | vc->vc_state = ESnormal; | |
2008 | switch (c) { | |
2009 | case '@': /* defined in ISO 2022 */ | |
2010 | vc->vc_utf = 0; | |
2011 | return; | |
2012 | case 'G': /* prelim official escape code */ | |
2013 | case '8': /* retained for compatibility */ | |
2014 | vc->vc_utf = 1; | |
2015 | return; | |
2016 | } | |
2017 | return; | |
2018 | case ESfunckey: | |
2019 | vc->vc_state = ESnormal; | |
2020 | return; | |
2021 | case EShash: | |
2022 | vc->vc_state = ESnormal; | |
2023 | if (c == '8') { | |
2024 | /* DEC screen alignment test. kludge :-) */ | |
2025 | vc->vc_video_erase_char = | |
2026 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2027 | csi_J(vc, 2); | |
2028 | vc->vc_video_erase_char = | |
2029 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2030 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2031 | } | |
2032 | return; | |
2033 | case ESsetG0: | |
2034 | if (c == '0') | |
2035 | vc->vc_G0_charset = GRAF_MAP; | |
2036 | else if (c == 'B') | |
2037 | vc->vc_G0_charset = LAT1_MAP; | |
2038 | else if (c == 'U') | |
2039 | vc->vc_G0_charset = IBMPC_MAP; | |
2040 | else if (c == 'K') | |
2041 | vc->vc_G0_charset = USER_MAP; | |
2042 | if (vc->vc_charset == 0) | |
2043 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2044 | vc->vc_state = ESnormal; | |
2045 | return; | |
2046 | case ESsetG1: | |
2047 | if (c == '0') | |
2048 | vc->vc_G1_charset = GRAF_MAP; | |
2049 | else if (c == 'B') | |
2050 | vc->vc_G1_charset = LAT1_MAP; | |
2051 | else if (c == 'U') | |
2052 | vc->vc_G1_charset = IBMPC_MAP; | |
2053 | else if (c == 'K') | |
2054 | vc->vc_G1_charset = USER_MAP; | |
2055 | if (vc->vc_charset == 1) | |
2056 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2057 | vc->vc_state = ESnormal; | |
2058 | return; | |
2059 | default: | |
2060 | vc->vc_state = ESnormal; | |
2061 | } | |
2062 | } | |
2063 | ||
2f1a2ccb | 2064 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2065 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2066 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2067 | */ | |
2068 | struct interval { | |
2069 | uint32_t first; | |
2070 | uint32_t last; | |
2071 | }; | |
2072 | ||
2073 | static int bisearch(uint32_t ucs, const struct interval *table, int max) | |
2074 | { | |
2075 | int min = 0; | |
2076 | int mid; | |
2077 | ||
2078 | if (ucs < table[0].first || ucs > table[max].last) | |
2079 | return 0; | |
2080 | while (max >= min) { | |
2081 | mid = (min + max) / 2; | |
2082 | if (ucs > table[mid].last) | |
2083 | min = mid + 1; | |
2084 | else if (ucs < table[mid].first) | |
2085 | max = mid - 1; | |
2086 | else | |
2087 | return 1; | |
2088 | } | |
2089 | return 0; | |
2090 | } | |
2091 | ||
2092 | static int is_double_width(uint32_t ucs) | |
2093 | { | |
2094 | static const struct interval double_width[] = { | |
2095 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2096 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2097 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2098 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2099 | }; |
0f11541b | 2100 | return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
2f1a2ccb EK |
2101 | } |
2102 | ||
ac751efa | 2103 | /* acquires console_lock */ |
1da177e4 LT |
2104 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
2105 | { | |
2106 | #ifdef VT_BUF_VRAM_ONLY | |
2107 | #define FLUSH do { } while(0); | |
2108 | #else | |
2109 | #define FLUSH if (draw_x >= 0) { \ | |
2110 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ | |
2111 | draw_x = -1; \ | |
2112 | } | |
2113 | #endif | |
2114 | ||
2115 | int c, tc, ok, n = 0, draw_x = -1; | |
2116 | unsigned int currcons; | |
2117 | unsigned long draw_from = 0, draw_to = 0; | |
2118 | struct vc_data *vc; | |
2f1a2ccb | 2119 | unsigned char vc_attr; |
0341a4d0 | 2120 | struct vt_notifier_param param; |
2f1a2ccb EK |
2121 | uint8_t rescan; |
2122 | uint8_t inverse; | |
2123 | uint8_t width; | |
1da177e4 | 2124 | u16 himask, charmask; |
1da177e4 LT |
2125 | |
2126 | if (in_interrupt()) | |
2127 | return count; | |
2128 | ||
2129 | might_sleep(); | |
2130 | ||
ac751efa | 2131 | console_lock(); |
1da177e4 LT |
2132 | vc = tty->driver_data; |
2133 | if (vc == NULL) { | |
2134 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); | |
ac751efa | 2135 | console_unlock(); |
1da177e4 LT |
2136 | return 0; |
2137 | } | |
2138 | ||
2139 | currcons = vc->vc_num; | |
2140 | if (!vc_cons_allocated(currcons)) { | |
1ffdda95 MSB |
2141 | /* could this happen? */ |
2142 | pr_warn_once("con_write: tty %d not allocated\n", currcons+1); | |
2143 | console_unlock(); | |
2144 | return 0; | |
1da177e4 | 2145 | } |
1da177e4 | 2146 | |
1da177e4 LT |
2147 | himask = vc->vc_hi_font_mask; |
2148 | charmask = himask ? 0x1ff : 0xff; | |
2149 | ||
2150 | /* undraw cursor first */ | |
2151 | if (IS_FG(vc)) | |
2152 | hide_cursor(vc); | |
2153 | ||
0341a4d0 KD |
2154 | param.vc = vc; |
2155 | ||
1da177e4 LT |
2156 | while (!tty->stopped && count) { |
2157 | int orig = *buf; | |
2158 | c = orig; | |
2159 | buf++; | |
2160 | n++; | |
2161 | count--; | |
2f1a2ccb EK |
2162 | rescan = 0; |
2163 | inverse = 0; | |
2164 | width = 1; | |
1da177e4 LT |
2165 | |
2166 | /* Do no translation at all in control states */ | |
2167 | if (vc->vc_state != ESnormal) { | |
2168 | tc = c; | |
d4328b40 | 2169 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2170 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2171 | * vc_utf_count is the number of continuation bytes still | |
2172 | * expected to arrive. | |
2173 | * vc_npar is the number of continuation bytes arrived so | |
2174 | * far | |
2175 | */ | |
d4328b40 | 2176 | rescan_last_byte: |
2f1a2ccb EK |
2177 | if ((c & 0xc0) == 0x80) { |
2178 | /* Continuation byte received */ | |
2179 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2180 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2181 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2182 | vc->vc_npar++; | |
2183 | if (--vc->vc_utf_count) { | |
2184 | /* Still need some bytes */ | |
1da177e4 | 2185 | continue; |
2f1a2ccb EK |
2186 | } |
2187 | /* Got a whole character */ | |
2188 | c = vc->vc_utf_char; | |
2189 | /* Reject overlong sequences */ | |
2190 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2191 | c > utf8_length_changes[vc->vc_npar]) | |
2192 | c = 0xfffd; | |
2193 | } else { | |
2194 | /* Unexpected continuation byte */ | |
2195 | vc->vc_utf_count = 0; | |
2196 | c = 0xfffd; | |
2197 | } | |
1da177e4 | 2198 | } else { |
2f1a2ccb EK |
2199 | /* Single ASCII byte or first byte of a sequence received */ |
2200 | if (vc->vc_utf_count) { | |
2201 | /* Continuation byte expected */ | |
2202 | rescan = 1; | |
2203 | vc->vc_utf_count = 0; | |
2204 | c = 0xfffd; | |
2205 | } else if (c > 0x7f) { | |
2206 | /* First byte of a multibyte sequence received */ | |
2207 | vc->vc_npar = 0; | |
2208 | if ((c & 0xe0) == 0xc0) { | |
2209 | vc->vc_utf_count = 1; | |
2210 | vc->vc_utf_char = (c & 0x1f); | |
2211 | } else if ((c & 0xf0) == 0xe0) { | |
2212 | vc->vc_utf_count = 2; | |
2213 | vc->vc_utf_char = (c & 0x0f); | |
2214 | } else if ((c & 0xf8) == 0xf0) { | |
2215 | vc->vc_utf_count = 3; | |
2216 | vc->vc_utf_char = (c & 0x07); | |
2217 | } else if ((c & 0xfc) == 0xf8) { | |
2218 | vc->vc_utf_count = 4; | |
2219 | vc->vc_utf_char = (c & 0x03); | |
2220 | } else if ((c & 0xfe) == 0xfc) { | |
2221 | vc->vc_utf_count = 5; | |
2222 | vc->vc_utf_char = (c & 0x01); | |
2223 | } else { | |
2224 | /* 254 and 255 are invalid */ | |
2225 | c = 0xfffd; | |
2226 | } | |
2227 | if (vc->vc_utf_count) { | |
2228 | /* Still need some bytes */ | |
2229 | continue; | |
2230 | } | |
2231 | } | |
2232 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2233 | } |
2f1a2ccb EK |
2234 | /* End of UTF-8 decoding. */ |
2235 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2236 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2237 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2238 | c = 0xfffd; | |
2239 | tc = c; | |
d4328b40 | 2240 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2241 | tc = vc_translate(vc, c); |
1da177e4 LT |
2242 | } |
2243 | ||
0341a4d0 KD |
2244 | param.c = tc; |
2245 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2246 | ¶m) == NOTIFY_STOP) | |
2247 | continue; | |
2248 | ||
1da177e4 LT |
2249 | /* If the original code was a control character we |
2250 | * only allow a glyph to be displayed if the code is | |
2251 | * not normally used (such as for cursor movement) or | |
2252 | * if the disp_ctrl mode has been explicitly enabled. | |
2253 | * Certain characters (as given by the CTRL_ALWAYS | |
2254 | * bitmap) are always displayed as control characters, | |
2255 | * as the console would be pretty useless without | |
2256 | * them; to display an arbitrary font position use the | |
2257 | * direct-to-font zone in UTF-8 mode. | |
2258 | */ | |
2259 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2260 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2261 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2262 | && (c != 127 || vc->vc_disp_ctrl) |
2263 | && (c != 128+27); | |
2264 | ||
2265 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2266 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2267 | if (is_double_width(c)) | |
2268 | width = 2; | |
2269 | } | |
1da177e4 LT |
2270 | /* Now try to find out how to display it */ |
2271 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2272 | if (tc & ~charmask) { |
2f1a2ccb EK |
2273 | if (tc == -1 || tc == -2) { |
2274 | continue; /* nothing to display */ | |
2275 | } | |
2276 | /* Glyph not found */ | |
c0b79882 | 2277 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2278 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2279 | This would make absolutely no sense with Unicode in mind, |
2280 | but do this for ASCII characters since a font may lack | |
2281 | Unicode mapping info and we don't want to end up with | |
2282 | having question marks only. */ | |
2f1a2ccb EK |
2283 | tc = c; |
2284 | } else { | |
2285 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2286 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2287 | if (tc < 0) { | |
2288 | inverse = 1; | |
2289 | tc = conv_uni_to_pc(vc, '?'); | |
2290 | if (tc < 0) tc = '?'; | |
2291 | } | |
2292 | } | |
d4328b40 | 2293 | } |
1da177e4 | 2294 | |
2f1a2ccb EK |
2295 | if (!inverse) { |
2296 | vc_attr = vc->vc_attr; | |
1da177e4 | 2297 | } else { |
2f1a2ccb EK |
2298 | /* invert vc_attr */ |
2299 | if (!vc->vc_can_do_color) { | |
2300 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2301 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2302 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2303 | } else { | |
2304 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2305 | } | |
1ed8a2b3 | 2306 | FLUSH |
1da177e4 | 2307 | } |
2f1a2ccb EK |
2308 | |
2309 | while (1) { | |
2310 | if (vc->vc_need_wrap || vc->vc_decim) | |
2311 | FLUSH | |
2312 | if (vc->vc_need_wrap) { | |
2313 | cr(vc); | |
2314 | lf(vc); | |
2315 | } | |
2316 | if (vc->vc_decim) | |
2317 | insert_char(vc, 1); | |
2318 | scr_writew(himask ? | |
2319 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2320 | (vc_attr << 8) + tc, | |
2321 | (u16 *) vc->vc_pos); | |
2322 | if (DO_UPDATE(vc) && draw_x < 0) { | |
2323 | draw_x = vc->vc_x; | |
2324 | draw_from = vc->vc_pos; | |
2325 | } | |
2326 | if (vc->vc_x == vc->vc_cols - 1) { | |
2327 | vc->vc_need_wrap = vc->vc_decawm; | |
2328 | draw_to = vc->vc_pos + 2; | |
2329 | } else { | |
2330 | vc->vc_x++; | |
2331 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2332 | } |
2f1a2ccb EK |
2333 | |
2334 | if (!--width) break; | |
2335 | ||
2336 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2337 | if (tc < 0) tc = ' '; | |
2338 | } | |
b293d758 | 2339 | notify_write(vc, c); |
2f1a2ccb | 2340 | |
1ed8a2b3 EK |
2341 | if (inverse) { |
2342 | FLUSH | |
2343 | } | |
2344 | ||
2f1a2ccb EK |
2345 | if (rescan) { |
2346 | rescan = 0; | |
2347 | inverse = 0; | |
2348 | width = 1; | |
d4328b40 AT |
2349 | c = orig; |
2350 | goto rescan_last_byte; | |
2351 | } | |
1da177e4 LT |
2352 | continue; |
2353 | } | |
2354 | FLUSH | |
2355 | do_con_trol(tty, vc, orig); | |
2356 | } | |
2357 | FLUSH | |
2358 | console_conditional_schedule(); | |
ac751efa | 2359 | console_unlock(); |
b293d758 | 2360 | notify_update(vc); |
1da177e4 LT |
2361 | return n; |
2362 | #undef FLUSH | |
2363 | } | |
2364 | ||
2365 | /* | |
2366 | * This is the console switching callback. | |
2367 | * | |
2368 | * Doing console switching in a process context allows | |
2369 | * us to do the switches asynchronously (needed when we want | |
2370 | * to switch due to a keyboard interrupt). Synchronization | |
2371 | * with other console code and prevention of re-entrancy is | |
ac751efa | 2372 | * ensured with console_lock. |
1da177e4 | 2373 | */ |
65f27f38 | 2374 | static void console_callback(struct work_struct *ignored) |
1da177e4 | 2375 | { |
ac751efa | 2376 | console_lock(); |
1da177e4 LT |
2377 | |
2378 | if (want_console >= 0) { | |
2379 | if (want_console != fg_console && | |
2380 | vc_cons_allocated(want_console)) { | |
2381 | hide_cursor(vc_cons[fg_console].d); | |
2382 | change_console(vc_cons[want_console].d); | |
2383 | /* we only changed when the console had already | |
2384 | been allocated - a new console is not created | |
2385 | in an interrupt routine */ | |
2386 | } | |
2387 | want_console = -1; | |
2388 | } | |
2389 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2390 | do_poke_blanked_console = 0; | |
2391 | poke_blanked_console(); | |
2392 | } | |
2393 | if (scrollback_delta) { | |
2394 | struct vc_data *vc = vc_cons[fg_console].d; | |
2395 | clear_selection(); | |
2396 | if (vc->vc_mode == KD_TEXT) | |
2397 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); | |
2398 | scrollback_delta = 0; | |
2399 | } | |
2400 | if (blank_timer_expired) { | |
2401 | do_blank_screen(0); | |
2402 | blank_timer_expired = 0; | |
2403 | } | |
b293d758 | 2404 | notify_update(vc_cons[fg_console].d); |
1da177e4 | 2405 | |
ac751efa | 2406 | console_unlock(); |
1da177e4 LT |
2407 | } |
2408 | ||
b257bc05 | 2409 | int set_console(int nr) |
1da177e4 | 2410 | { |
b257bc05 AJ |
2411 | struct vc_data *vc = vc_cons[fg_console].d; |
2412 | ||
2413 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2414 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2415 | ||
2416 | /* | |
2417 | * Console switch will fail in console_callback() or | |
2418 | * change_console() so there is no point scheduling | |
2419 | * the callback | |
2420 | * | |
2421 | * Existing set_console() users don't check the return | |
2422 | * value so this shouldn't break anything | |
2423 | */ | |
2424 | return -EINVAL; | |
2425 | } | |
2426 | ||
1da177e4 LT |
2427 | want_console = nr; |
2428 | schedule_console_callback(); | |
b257bc05 AJ |
2429 | |
2430 | return 0; | |
1da177e4 LT |
2431 | } |
2432 | ||
2433 | struct tty_driver *console_driver; | |
2434 | ||
2435 | #ifdef CONFIG_VT_CONSOLE | |
2436 | ||
5ada918b BW |
2437 | /** |
2438 | * vt_kmsg_redirect() - Sets/gets the kernel message console | |
2439 | * @new: The new virtual terminal number or -1 if the console should stay | |
2440 | * unchanged | |
2441 | * | |
2442 | * By default, the kernel messages are always printed on the current virtual | |
2443 | * console. However, the user may modify that default with the | |
2444 | * TIOCL_SETKMSGREDIRECT ioctl call. | |
2445 | * | |
2446 | * This function sets the kernel message console to be @new. It returns the old | |
2447 | * virtual console number. The virtual terminal number 0 (both as parameter and | |
2448 | * return value) means no redirection (i.e. always printed on the currently | |
2449 | * active console). | |
2450 | * | |
2451 | * The parameter -1 means that only the current console is returned, but the | |
2452 | * value is not modified. You may use the macro vt_get_kmsg_redirect() in that | |
2453 | * case to make the code more understandable. | |
2454 | * | |
2455 | * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores | |
2456 | * the parameter and always returns 0. | |
2457 | */ | |
2458 | int vt_kmsg_redirect(int new) | |
2459 | { | |
2460 | static int kmsg_con; | |
2461 | ||
2462 | if (new != -1) | |
2463 | return xchg(&kmsg_con, new); | |
2464 | else | |
2465 | return kmsg_con; | |
2466 | } | |
2467 | ||
1da177e4 LT |
2468 | /* |
2469 | * Console on virtual terminal | |
2470 | * | |
2471 | * The console must be locked when we get here. | |
2472 | */ | |
2473 | ||
2474 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2475 | { | |
2476 | struct vc_data *vc = vc_cons[fg_console].d; | |
2477 | unsigned char c; | |
b0940003 | 2478 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 LT |
2479 | const ushort *start; |
2480 | ushort cnt = 0; | |
2481 | ushort myx; | |
5ada918b | 2482 | int kmsg_console; |
1da177e4 LT |
2483 | |
2484 | /* console busy or not yet initialized */ | |
b0940003 NP |
2485 | if (!printable) |
2486 | return; | |
2487 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2488 | return; |
2489 | ||
5ada918b BW |
2490 | kmsg_console = vt_get_kmsg_redirect(); |
2491 | if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) | |
2492 | vc = vc_cons[kmsg_console - 1].d; | |
1da177e4 LT |
2493 | |
2494 | /* read `x' only after setting currcons properly (otherwise | |
2495 | the `x' macro will read the x of the foreground console). */ | |
2496 | myx = vc->vc_x; | |
2497 | ||
2498 | if (!vc_cons_allocated(fg_console)) { | |
2499 | /* impossible */ | |
2500 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2501 | goto quit; | |
2502 | } | |
2503 | ||
8fd4bd22 | 2504 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) |
1da177e4 LT |
2505 | goto quit; |
2506 | ||
2507 | /* undraw cursor first */ | |
2508 | if (IS_FG(vc)) | |
2509 | hide_cursor(vc); | |
2510 | ||
2511 | start = (ushort *)vc->vc_pos; | |
2512 | ||
2513 | /* Contrived structure to try to emulate original need_wrap behaviour | |
2514 | * Problems caused when we have need_wrap set on '\n' character */ | |
2515 | while (count--) { | |
2516 | c = *b++; | |
2517 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
2518 | if (cnt > 0) { | |
2519 | if (CON_IS_VISIBLE(vc)) | |
2520 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2521 | vc->vc_x += cnt; | |
2522 | if (vc->vc_need_wrap) | |
2523 | vc->vc_x--; | |
2524 | cnt = 0; | |
2525 | } | |
2526 | if (c == 8) { /* backspace */ | |
2527 | bs(vc); | |
2528 | start = (ushort *)vc->vc_pos; | |
2529 | myx = vc->vc_x; | |
2530 | continue; | |
2531 | } | |
2532 | if (c != 13) | |
2533 | lf(vc); | |
2534 | cr(vc); | |
2535 | start = (ushort *)vc->vc_pos; | |
2536 | myx = vc->vc_x; | |
2537 | if (c == 10 || c == 13) | |
2538 | continue; | |
2539 | } | |
2540 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); | |
b293d758 | 2541 | notify_write(vc, c); |
1da177e4 LT |
2542 | cnt++; |
2543 | if (myx == vc->vc_cols - 1) { | |
2544 | vc->vc_need_wrap = 1; | |
2545 | continue; | |
2546 | } | |
2547 | vc->vc_pos += 2; | |
2548 | myx++; | |
2549 | } | |
2550 | if (cnt > 0) { | |
2551 | if (CON_IS_VISIBLE(vc)) | |
2552 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2553 | vc->vc_x += cnt; | |
2554 | if (vc->vc_x == vc->vc_cols) { | |
2555 | vc->vc_x--; | |
2556 | vc->vc_need_wrap = 1; | |
2557 | } | |
2558 | } | |
2559 | set_cursor(vc); | |
b293d758 | 2560 | notify_update(vc); |
1da177e4 LT |
2561 | |
2562 | quit: | |
b0940003 | 2563 | spin_unlock(&printing_lock); |
1da177e4 LT |
2564 | } |
2565 | ||
2566 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
2567 | { | |
2568 | *index = c->index ? c->index-1 : fg_console; | |
2569 | return console_driver; | |
2570 | } | |
2571 | ||
2572 | static struct console vt_console_driver = { | |
2573 | .name = "tty", | |
2574 | .write = vt_console_print, | |
2575 | .device = vt_console_device, | |
2576 | .unblank = unblank_screen, | |
2577 | .flags = CON_PRINTBUFFER, | |
2578 | .index = -1, | |
2579 | }; | |
2580 | #endif | |
2581 | ||
2582 | /* | |
2583 | * Handling of Linux-specific VC ioctls | |
2584 | */ | |
2585 | ||
2586 | /* | |
ac751efa | 2587 | * Generally a bit racy with respect to console_lock();. |
1da177e4 LT |
2588 | * |
2589 | * There are some functions which don't need it. | |
2590 | * | |
2591 | * There are some functions which can sleep for arbitrary periods | |
2592 | * (paste_selection) but we don't need the lock there anyway. | |
2593 | * | |
2594 | * set_selection has locking, and definitely needs it | |
2595 | */ | |
2596 | ||
2597 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
2598 | { | |
2599 | char type, data; | |
2600 | char __user *p = (char __user *)arg; | |
2601 | int lines; | |
2602 | int ret; | |
2603 | ||
1da177e4 LT |
2604 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
2605 | return -EPERM; | |
2606 | if (get_user(type, p)) | |
2607 | return -EFAULT; | |
2608 | ret = 0; | |
04f378b1 | 2609 | |
1da177e4 LT |
2610 | switch (type) |
2611 | { | |
2612 | case TIOCL_SETSEL: | |
ac751efa | 2613 | console_lock(); |
1da177e4 | 2614 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); |
ac751efa | 2615 | console_unlock(); |
1da177e4 LT |
2616 | break; |
2617 | case TIOCL_PASTESEL: | |
2618 | ret = paste_selection(tty); | |
2619 | break; | |
2620 | case TIOCL_UNBLANKSCREEN: | |
ac751efa | 2621 | console_lock(); |
1da177e4 | 2622 | unblank_screen(); |
ac751efa | 2623 | console_unlock(); |
1da177e4 LT |
2624 | break; |
2625 | case TIOCL_SELLOADLUT: | |
2626 | ret = sel_loadlut(p); | |
2627 | break; | |
2628 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 2629 | |
1da177e4 LT |
2630 | /* |
2631 | * Make it possible to react to Shift+Mousebutton. | |
2632 | * Note that 'shift_state' is an undocumented | |
2633 | * kernel-internal variable; programs not closely | |
2634 | * related to the kernel should not use this. | |
2635 | */ | |
079c9534 | 2636 | data = vt_get_shift_state(); |
1da177e4 LT |
2637 | ret = __put_user(data, p); |
2638 | break; | |
2639 | case TIOCL_GETMOUSEREPORTING: | |
2640 | data = mouse_reporting(); | |
2641 | ret = __put_user(data, p); | |
2642 | break; | |
2643 | case TIOCL_SETVESABLANK: | |
403aac96 | 2644 | ret = set_vesa_blanking(p); |
1da177e4 | 2645 | break; |
0ca07731 | 2646 | case TIOCL_GETKMSGREDIRECT: |
5ada918b | 2647 | data = vt_get_kmsg_redirect(); |
0ca07731 RW |
2648 | ret = __put_user(data, p); |
2649 | break; | |
1da177e4 LT |
2650 | case TIOCL_SETKMSGREDIRECT: |
2651 | if (!capable(CAP_SYS_ADMIN)) { | |
2652 | ret = -EPERM; | |
2653 | } else { | |
2654 | if (get_user(data, p+1)) | |
2655 | ret = -EFAULT; | |
2656 | else | |
5ada918b | 2657 | vt_kmsg_redirect(data); |
1da177e4 LT |
2658 | } |
2659 | break; | |
2660 | case TIOCL_GETFGCONSOLE: | |
2661 | ret = fg_console; | |
2662 | break; | |
2663 | case TIOCL_SCROLLCONSOLE: | |
2664 | if (get_user(lines, (s32 __user *)(p+4))) { | |
2665 | ret = -EFAULT; | |
2666 | } else { | |
2667 | scrollfront(vc_cons[fg_console].d, lines); | |
2668 | ret = 0; | |
2669 | } | |
2670 | break; | |
2671 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
ac751efa | 2672 | console_lock(); |
1da177e4 LT |
2673 | ignore_poke = 1; |
2674 | do_blank_screen(0); | |
ac751efa | 2675 | console_unlock(); |
1da177e4 LT |
2676 | break; |
2677 | case TIOCL_BLANKEDSCREEN: | |
2678 | ret = console_blanked; | |
2679 | break; | |
2680 | default: | |
2681 | ret = -EINVAL; | |
2682 | break; | |
2683 | } | |
2684 | return ret; | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * /dev/ttyN handling | |
2689 | */ | |
2690 | ||
2691 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2692 | { | |
2693 | int retval; | |
2694 | ||
2695 | retval = do_con_write(tty, buf, count); | |
2696 | con_flush_chars(tty); | |
2697 | ||
2698 | return retval; | |
2699 | } | |
2700 | ||
5d19f546 | 2701 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
2702 | { |
2703 | if (in_interrupt()) | |
5d19f546 AC |
2704 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
2705 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
2706 | } |
2707 | ||
2708 | static int con_write_room(struct tty_struct *tty) | |
2709 | { | |
2710 | if (tty->stopped) | |
2711 | return 0; | |
a88a69c9 | 2712 | return 32768; /* No limit, really; we're not buffering */ |
1da177e4 LT |
2713 | } |
2714 | ||
2715 | static int con_chars_in_buffer(struct tty_struct *tty) | |
2716 | { | |
2717 | return 0; /* we're not buffering */ | |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * con_throttle and con_unthrottle are only used for | |
2722 | * paste_selection(), which has to stuff in a large number of | |
2723 | * characters... | |
2724 | */ | |
2725 | static void con_throttle(struct tty_struct *tty) | |
2726 | { | |
2727 | } | |
2728 | ||
2729 | static void con_unthrottle(struct tty_struct *tty) | |
2730 | { | |
2731 | struct vc_data *vc = tty->driver_data; | |
2732 | ||
2733 | wake_up_interruptible(&vc->paste_wait); | |
2734 | } | |
2735 | ||
2736 | /* | |
2737 | * Turn the Scroll-Lock LED on when the tty is stopped | |
2738 | */ | |
2739 | static void con_stop(struct tty_struct *tty) | |
2740 | { | |
2741 | int console_num; | |
2742 | if (!tty) | |
2743 | return; | |
2744 | console_num = tty->index; | |
2745 | if (!vc_cons_allocated(console_num)) | |
2746 | return; | |
079c9534 | 2747 | vt_kbd_con_stop(console_num); |
1da177e4 LT |
2748 | } |
2749 | ||
2750 | /* | |
2751 | * Turn the Scroll-Lock LED off when the console is started | |
2752 | */ | |
2753 | static void con_start(struct tty_struct *tty) | |
2754 | { | |
2755 | int console_num; | |
2756 | if (!tty) | |
2757 | return; | |
2758 | console_num = tty->index; | |
2759 | if (!vc_cons_allocated(console_num)) | |
2760 | return; | |
079c9534 | 2761 | vt_kbd_con_start(console_num); |
1da177e4 LT |
2762 | } |
2763 | ||
2764 | static void con_flush_chars(struct tty_struct *tty) | |
2765 | { | |
2766 | struct vc_data *vc; | |
2767 | ||
2768 | if (in_interrupt()) /* from flush_to_ldisc */ | |
2769 | return; | |
2770 | ||
2771 | /* if we race with con_close(), vt may be null */ | |
ac751efa | 2772 | console_lock(); |
1da177e4 LT |
2773 | vc = tty->driver_data; |
2774 | if (vc) | |
2775 | set_cursor(vc); | |
ac751efa | 2776 | console_unlock(); |
1da177e4 LT |
2777 | } |
2778 | ||
2779 | /* | |
2780 | * Allocate the console screen memory. | |
2781 | */ | |
2782 | static int con_open(struct tty_struct *tty, struct file *filp) | |
2783 | { | |
2784 | unsigned int currcons = tty->index; | |
2785 | int ret = 0; | |
2786 | ||
ac751efa | 2787 | console_lock(); |
f786648b | 2788 | if (tty->driver_data == NULL) { |
1da177e4 LT |
2789 | ret = vc_allocate(currcons); |
2790 | if (ret == 0) { | |
2791 | struct vc_data *vc = vc_cons[currcons].d; | |
feebed65 AC |
2792 | |
2793 | /* Still being freed */ | |
8ce73264 | 2794 | if (vc->port.tty) { |
ac751efa | 2795 | console_unlock(); |
feebed65 AC |
2796 | return -ERESTARTSYS; |
2797 | } | |
1da177e4 | 2798 | tty->driver_data = vc; |
8ce73264 | 2799 | vc->port.tty = tty; |
1da177e4 LT |
2800 | |
2801 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
2802 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
2803 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
2804 | } | |
c1236d31 ST |
2805 | if (vc->vc_utf) |
2806 | tty->termios->c_iflag |= IUTF8; | |
2807 | else | |
2808 | tty->termios->c_iflag &= ~IUTF8; | |
ac751efa | 2809 | console_unlock(); |
1da177e4 LT |
2810 | return ret; |
2811 | } | |
2812 | } | |
ac751efa | 2813 | console_unlock(); |
1da177e4 LT |
2814 | return ret; |
2815 | } | |
2816 | ||
1da177e4 LT |
2817 | static void con_close(struct tty_struct *tty, struct file *filp) |
2818 | { | |
feebed65 AC |
2819 | /* Nothing to do - we defer to shutdown */ |
2820 | } | |
1da177e4 | 2821 | |
feebed65 AC |
2822 | static void con_shutdown(struct tty_struct *tty) |
2823 | { | |
2824 | struct vc_data *vc = tty->driver_data; | |
2825 | BUG_ON(vc == NULL); | |
ac751efa | 2826 | console_lock(); |
8ce73264 | 2827 | vc->port.tty = NULL; |
ac751efa | 2828 | console_unlock(); |
feebed65 | 2829 | tty_shutdown(tty); |
1da177e4 LT |
2830 | } |
2831 | ||
fa6ce9ab JE |
2832 | static int default_italic_color = 2; // green (ASCII) |
2833 | static int default_underline_color = 3; // cyan (ASCII) | |
2834 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); | |
2835 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
2836 | ||
1da177e4 LT |
2837 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2838 | unsigned int cols, int do_clear) | |
2839 | { | |
2840 | int j, k ; | |
2841 | ||
2842 | vc->vc_cols = cols; | |
2843 | vc->vc_rows = rows; | |
2844 | vc->vc_size_row = cols << 1; | |
2845 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
2846 | ||
2847 | set_origin(vc); | |
2848 | vc->vc_pos = vc->vc_origin; | |
2849 | reset_vc(vc); | |
2850 | for (j=k=0; j<16; j++) { | |
2851 | vc->vc_palette[k++] = default_red[j] ; | |
2852 | vc->vc_palette[k++] = default_grn[j] ; | |
2853 | vc->vc_palette[k++] = default_blu[j] ; | |
2854 | } | |
2855 | vc->vc_def_color = 0x07; /* white */ | |
fa6ce9ab JE |
2856 | vc->vc_ulcolor = default_underline_color; |
2857 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
2858 | vc->vc_halfcolor = 0x08; /* grey */ |
2859 | init_waitqueue_head(&vc->paste_wait); | |
2860 | reset_terminal(vc, do_clear); | |
2861 | } | |
2862 | ||
2863 | /* | |
2864 | * This routine initializes console interrupts, and does nothing | |
2865 | * else. If you want the screen to clear, call tty_write with | |
2866 | * the appropriate escape-sequence. | |
2867 | */ | |
2868 | ||
2869 | static int __init con_init(void) | |
2870 | { | |
2871 | const char *display_desc = NULL; | |
2872 | struct vc_data *vc; | |
3e795de7 | 2873 | unsigned int currcons = 0, i; |
1da177e4 | 2874 | |
ac751efa | 2875 | console_lock(); |
1da177e4 LT |
2876 | |
2877 | if (conswitchp) | |
2878 | display_desc = conswitchp->con_startup(); | |
2879 | if (!display_desc) { | |
2880 | fg_console = 0; | |
ac751efa | 2881 | console_unlock(); |
1da177e4 LT |
2882 | return 0; |
2883 | } | |
2884 | ||
3e795de7 AD |
2885 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
2886 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
2887 | ||
2888 | if (con_driver->con == NULL) { | |
2889 | con_driver->con = conswitchp; | |
2890 | con_driver->desc = display_desc; | |
2891 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
2892 | con_driver->first = 0; | |
2893 | con_driver->last = MAX_NR_CONSOLES - 1; | |
2894 | break; | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
2899 | con_driver_map[i] = conswitchp; | |
2900 | ||
1da177e4 LT |
2901 | if (blankinterval) { |
2902 | blank_state = blank_normal_wait; | |
f324edc8 | 2903 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
2904 | } |
2905 | ||
1da177e4 | 2906 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
a5f4f52e | 2907 | vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
7f1f86a0 | 2908 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
ff917ba4 | 2909 | tty_port_init(&vc->port); |
1da177e4 | 2910 | visual_init(vc, currcons, 1); |
a5f4f52e | 2911 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
1da177e4 LT |
2912 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
2913 | currcons || !vc->vc_sw->con_save_screen); | |
2914 | } | |
2915 | currcons = fg_console = 0; | |
2916 | master_display_fg = vc = vc_cons[currcons].d; | |
2917 | set_origin(vc); | |
2918 | save_screen(vc); | |
2919 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
2920 | csi_J(vc, 0); | |
2921 | update_screen(vc); | |
1ffdda95 | 2922 | pr_info("Console: %s %s %dx%d", |
1da177e4 LT |
2923 | vc->vc_can_do_color ? "colour" : "mono", |
2924 | display_desc, vc->vc_cols, vc->vc_rows); | |
2925 | printable = 1; | |
2926 | printk("\n"); | |
2927 | ||
ac751efa | 2928 | console_unlock(); |
1da177e4 LT |
2929 | |
2930 | #ifdef CONFIG_VT_CONSOLE | |
2931 | register_console(&vt_console_driver); | |
2932 | #endif | |
2933 | return 0; | |
2934 | } | |
2935 | console_initcall(con_init); | |
2936 | ||
b68e31d0 | 2937 | static const struct tty_operations con_ops = { |
1da177e4 LT |
2938 | .open = con_open, |
2939 | .close = con_close, | |
2940 | .write = con_write, | |
2941 | .write_room = con_write_room, | |
2942 | .put_char = con_put_char, | |
2943 | .flush_chars = con_flush_chars, | |
2944 | .chars_in_buffer = con_chars_in_buffer, | |
2945 | .ioctl = vt_ioctl, | |
e9216651 AB |
2946 | #ifdef CONFIG_COMPAT |
2947 | .compat_ioctl = vt_compat_ioctl, | |
2948 | #endif | |
1da177e4 LT |
2949 | .stop = con_stop, |
2950 | .start = con_start, | |
2951 | .throttle = con_throttle, | |
2952 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 2953 | .resize = vt_resize, |
feebed65 | 2954 | .shutdown = con_shutdown |
1da177e4 LT |
2955 | }; |
2956 | ||
d81ed103 AC |
2957 | static struct cdev vc0_cdev; |
2958 | ||
fbc92a34 KS |
2959 | static ssize_t show_tty_active(struct device *dev, |
2960 | struct device_attribute *attr, char *buf) | |
2961 | { | |
2962 | return sprintf(buf, "tty%d\n", fg_console + 1); | |
2963 | } | |
2964 | static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); | |
2965 | ||
d81ed103 | 2966 | int __init vty_init(const struct file_operations *console_fops) |
1da177e4 | 2967 | { |
d81ed103 AC |
2968 | cdev_init(&vc0_cdev, console_fops); |
2969 | if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || | |
2970 | register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) | |
2971 | panic("Couldn't register /dev/tty0 driver\n"); | |
fbc92a34 KS |
2972 | tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); |
2973 | if (IS_ERR(tty0dev)) | |
2974 | tty0dev = NULL; | |
2975 | else | |
a2a6a822 | 2976 | WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0); |
d81ed103 | 2977 | |
1da177e4 LT |
2978 | vcs_init(); |
2979 | ||
2980 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
2981 | if (!console_driver) | |
2982 | panic("Couldn't allocate console driver\n"); | |
2983 | console_driver->owner = THIS_MODULE; | |
1da177e4 LT |
2984 | console_driver->name = "tty"; |
2985 | console_driver->name_base = 1; | |
2986 | console_driver->major = TTY_MAJOR; | |
2987 | console_driver->minor_start = 1; | |
2988 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
2989 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
2990 | if (default_utf8) |
2991 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
2992 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
2993 | tty_set_operations(console_driver, &con_ops); | |
2994 | if (tty_register_driver(console_driver)) | |
2995 | panic("Couldn't register console driver\n"); | |
1da177e4 LT |
2996 | kbd_init(); |
2997 | console_map_init(); | |
1da177e4 LT |
2998 | #ifdef CONFIG_MDA_CONSOLE |
2999 | mda_console_init(); | |
3000 | #endif | |
3001 | return 0; | |
3002 | } | |
3003 | ||
3004 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
3005 | |
3006 | static struct class *vtconsole_class; | |
3007 | ||
b7269dd2 JB |
3008 | static int bind_con_driver(const struct consw *csw, int first, int last, |
3009 | int deflt) | |
1da177e4 | 3010 | { |
3e795de7 AD |
3011 | struct module *owner = csw->owner; |
3012 | const char *desc = NULL; | |
3013 | struct con_driver *con_driver; | |
3014 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 3015 | |
1da177e4 LT |
3016 | if (!try_module_get(owner)) |
3017 | return -ENODEV; | |
3018 | ||
ac751efa | 3019 | console_lock(); |
1c8ce271 | 3020 | |
3e795de7 AD |
3021 | /* check if driver is registered */ |
3022 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3023 | con_driver = ®istered_con_driver[i]; | |
3024 | ||
3025 | if (con_driver->con == csw) { | |
3026 | desc = con_driver->desc; | |
3027 | retval = 0; | |
3028 | break; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | if (retval) | |
3033 | goto err; | |
3034 | ||
3035 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3036 | csw->con_startup(); | |
3037 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3038 | } |
1c8ce271 | 3039 | |
1da177e4 LT |
3040 | if (deflt) { |
3041 | if (conswitchp) | |
3042 | module_put(conswitchp->owner); | |
1c8ce271 | 3043 | |
1da177e4 LT |
3044 | __module_get(owner); |
3045 | conswitchp = csw; | |
3046 | } | |
3047 | ||
3e795de7 AD |
3048 | first = max(first, con_driver->first); |
3049 | last = min(last, con_driver->last); | |
3050 | ||
1da177e4 LT |
3051 | for (i = first; i <= last; i++) { |
3052 | int old_was_color; | |
3053 | struct vc_data *vc = vc_cons[i].d; | |
3054 | ||
3055 | if (con_driver_map[i]) | |
3056 | module_put(con_driver_map[i]->owner); | |
3057 | __module_get(owner); | |
3058 | con_driver_map[i] = csw; | |
3059 | ||
3060 | if (!vc || !vc->vc_sw) | |
3061 | continue; | |
3062 | ||
3063 | j = i; | |
1c8ce271 | 3064 | |
4ee1acce DH |
3065 | if (CON_IS_VISIBLE(vc)) { |
3066 | k = i; | |
1da177e4 | 3067 | save_screen(vc); |
4ee1acce DH |
3068 | } |
3069 | ||
1da177e4 LT |
3070 | old_was_color = vc->vc_can_do_color; |
3071 | vc->vc_sw->con_deinit(vc); | |
9fc2b2d0 | 3072 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
1da177e4 | 3073 | visual_init(vc, i, 0); |
1c8ce271 | 3074 | set_origin(vc); |
1da177e4 LT |
3075 | update_attr(vc); |
3076 | ||
3077 | /* If the console changed between mono <-> color, then | |
3078 | * the attributes in the screenbuf will be wrong. The | |
3079 | * following resets all attributes to something sane. | |
3080 | */ | |
3081 | if (old_was_color != vc->vc_can_do_color) | |
3082 | clear_buffer_attributes(vc); | |
1da177e4 | 3083 | } |
4ee1acce | 3084 | |
1ffdda95 | 3085 | pr_info("Console: switching "); |
1da177e4 LT |
3086 | if (!deflt) |
3087 | printk("consoles %d-%d ", first+1, last+1); | |
4ee1acce DH |
3088 | if (j >= 0) { |
3089 | struct vc_data *vc = vc_cons[j].d; | |
3090 | ||
1da177e4 | 3091 | printk("to %s %s %dx%d\n", |
4ee1acce DH |
3092 | vc->vc_can_do_color ? "colour" : "mono", |
3093 | desc, vc->vc_cols, vc->vc_rows); | |
3094 | ||
3095 | if (k >= 0) { | |
3096 | vc = vc_cons[k].d; | |
3097 | update_screen(vc); | |
3098 | } | |
3099 | } else | |
1da177e4 LT |
3100 | printk("to %s\n", desc); |
3101 | ||
3e795de7 AD |
3102 | retval = 0; |
3103 | err: | |
ac751efa | 3104 | console_unlock(); |
1da177e4 | 3105 | module_put(owner); |
3e795de7 AD |
3106 | return retval; |
3107 | }; | |
1da177e4 | 3108 | |
13ae6645 AD |
3109 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
3110 | static int con_is_graphics(const struct consw *csw, int first, int last) | |
3111 | { | |
3112 | int i, retval = 0; | |
3113 | ||
3114 | for (i = first; i <= last; i++) { | |
3115 | struct vc_data *vc = vc_cons[i].d; | |
3116 | ||
3117 | if (vc && vc->vc_mode == KD_GRAPHICS) { | |
3118 | retval = 1; | |
3119 | break; | |
3120 | } | |
3121 | } | |
3122 | ||
3123 | return retval; | |
3124 | } | |
3125 | ||
b7269dd2 JB |
3126 | /** |
3127 | * unbind_con_driver - unbind a console driver | |
3128 | * @csw: pointer to console driver to unregister | |
3129 | * @first: first in range of consoles that @csw should be unbound from | |
3130 | * @last: last in range of consoles that @csw should be unbound from | |
3131 | * @deflt: should next bound console driver be default after @csw is unbound? | |
3132 | * | |
3133 | * To unbind a driver from all possible consoles, pass 0 as @first and | |
3134 | * %MAX_NR_CONSOLES as @last. | |
3135 | * | |
3136 | * @deflt controls whether the console that ends up replacing @csw should be | |
3137 | * the default console. | |
3138 | * | |
3139 | * RETURNS: | |
3140 | * -ENODEV if @csw isn't a registered console driver or can't be unregistered | |
3141 | * or 0 on success. | |
3142 | */ | |
623e71b0 | 3143 | int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) |
1da177e4 | 3144 | { |
3e795de7 AD |
3145 | struct module *owner = csw->owner; |
3146 | const struct consw *defcsw = NULL; | |
3147 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3148 | int i, retval = -ENODEV; | |
1da177e4 | 3149 | |
3e795de7 AD |
3150 | if (!try_module_get(owner)) |
3151 | return -ENODEV; | |
3152 | ||
ac751efa | 3153 | console_lock(); |
3e795de7 AD |
3154 | |
3155 | /* check if driver is registered and if it is unbindable */ | |
3156 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3157 | con_driver = ®istered_con_driver[i]; | |
3158 | ||
3159 | if (con_driver->con == csw && | |
6db4063c | 3160 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3161 | retval = 0; |
3162 | break; | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | if (retval) { | |
ac751efa | 3167 | console_unlock(); |
3e795de7 AD |
3168 | goto err; |
3169 | } | |
3170 | ||
6db4063c AD |
3171 | retval = -ENODEV; |
3172 | ||
3e795de7 AD |
3173 | /* check if backup driver exists */ |
3174 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3175 | con_back = ®istered_con_driver[i]; | |
3176 | ||
3177 | if (con_back->con && | |
6db4063c | 3178 | !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { |
3e795de7 AD |
3179 | defcsw = con_back->con; |
3180 | retval = 0; | |
3181 | break; | |
3182 | } | |
3183 | } | |
3184 | ||
3185 | if (retval) { | |
ac751efa | 3186 | console_unlock(); |
3e795de7 AD |
3187 | goto err; |
3188 | } | |
3189 | ||
3190 | if (!con_is_bound(csw)) { | |
ac751efa | 3191 | console_unlock(); |
3e795de7 AD |
3192 | goto err; |
3193 | } | |
3194 | ||
3195 | first = max(first, con_driver->first); | |
3196 | last = min(last, con_driver->last); | |
3197 | ||
3198 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3199 | if (con_driver_map[i] == csw) { |
3200 | module_put(csw->owner); | |
3201 | con_driver_map[i] = NULL; | |
3202 | } | |
3e795de7 AD |
3203 | } |
3204 | ||
3205 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3206 | const struct consw *defconsw = conswitchp; |
3207 | ||
3e795de7 AD |
3208 | defcsw->con_startup(); |
3209 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3210 | /* |
3211 | * vgacon may change the default driver to point | |
3212 | * to dummycon, we restore it here... | |
3213 | */ | |
3214 | conswitchp = defconsw; | |
3e795de7 AD |
3215 | } |
3216 | ||
3217 | if (!con_is_bound(csw)) | |
3218 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3219 | ||
ac751efa | 3220 | console_unlock(); |
6db4063c AD |
3221 | /* ignore return value, binding should not fail */ |
3222 | bind_con_driver(defcsw, first, last, deflt); | |
3e795de7 AD |
3223 | err: |
3224 | module_put(owner); | |
3225 | return retval; | |
3226 | ||
3227 | } | |
623e71b0 | 3228 | EXPORT_SYMBOL(unbind_con_driver); |
3e795de7 | 3229 | |
6db4063c AD |
3230 | static int vt_bind(struct con_driver *con) |
3231 | { | |
3232 | const struct consw *defcsw = NULL, *csw = NULL; | |
3233 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3234 | ||
3235 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3236 | con_is_graphics(con->con, con->first, con->last)) | |
3237 | goto err; | |
3238 | ||
3239 | csw = con->con; | |
3240 | ||
3241 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3242 | struct con_driver *con = ®istered_con_driver[i]; | |
3243 | ||
3244 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3245 | defcsw = con->con; | |
3246 | break; | |
3247 | } | |
3248 | } | |
3249 | ||
3250 | if (!defcsw) | |
3251 | goto err; | |
3252 | ||
3253 | while (more) { | |
3254 | more = 0; | |
3255 | ||
3256 | for (i = con->first; i <= con->last; i++) { | |
3257 | if (con_driver_map[i] == defcsw) { | |
3258 | if (first == -1) | |
3259 | first = i; | |
3260 | last = i; | |
3261 | more = 1; | |
3262 | } else if (first != -1) | |
3263 | break; | |
3264 | } | |
3265 | ||
3266 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3267 | deflt = 1; | |
3268 | ||
3269 | if (first != -1) | |
3270 | bind_con_driver(csw, first, last, deflt); | |
3271 | ||
3272 | first = -1; | |
3273 | last = -1; | |
3274 | deflt = 0; | |
3275 | } | |
3276 | ||
3277 | err: | |
3278 | return 0; | |
3279 | } | |
3280 | ||
3281 | static int vt_unbind(struct con_driver *con) | |
3282 | { | |
3283 | const struct consw *csw = NULL; | |
3284 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3285 | ||
3286 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3287 | con_is_graphics(con->con, con->first, con->last)) | |
3288 | goto err; | |
3289 | ||
3290 | csw = con->con; | |
3291 | ||
3292 | while (more) { | |
3293 | more = 0; | |
3294 | ||
3295 | for (i = con->first; i <= con->last; i++) { | |
3296 | if (con_driver_map[i] == csw) { | |
3297 | if (first == -1) | |
3298 | first = i; | |
3299 | last = i; | |
3300 | more = 1; | |
3301 | } else if (first != -1) | |
3302 | break; | |
3303 | } | |
3304 | ||
3305 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3306 | deflt = 1; | |
3307 | ||
3308 | if (first != -1) | |
3309 | unbind_con_driver(csw, first, last, deflt); | |
3310 | ||
3311 | first = -1; | |
3312 | last = -1; | |
3313 | deflt = 0; | |
3314 | } | |
3315 | ||
3316 | err: | |
3317 | return 0; | |
3318 | } | |
13ae6645 AD |
3319 | #else |
3320 | static inline int vt_bind(struct con_driver *con) | |
3321 | { | |
3322 | return 0; | |
3323 | } | |
3324 | static inline int vt_unbind(struct con_driver *con) | |
3325 | { | |
3326 | return 0; | |
3327 | } | |
3328 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3329 | |
805952a8 | 3330 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3331 | const char *buf, size_t count) |
3332 | { | |
805952a8 | 3333 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3334 | int bind = simple_strtoul(buf, NULL, 0); |
3335 | ||
3336 | if (bind) | |
3337 | vt_bind(con); | |
3338 | else | |
3339 | vt_unbind(con); | |
3340 | ||
3341 | return count; | |
3342 | } | |
3343 | ||
805952a8 GKH |
3344 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3345 | char *buf) | |
6db4063c | 3346 | { |
805952a8 | 3347 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3348 | int bind = con_is_bound(con->con); |
3349 | ||
3350 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3351 | } | |
3352 | ||
805952a8 GKH |
3353 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3354 | char *buf) | |
6db4063c | 3355 | { |
805952a8 | 3356 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3357 | |
3358 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3359 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3360 | con->desc); | |
3361 | ||
3362 | } | |
3363 | ||
805952a8 | 3364 | static struct device_attribute device_attrs[] = { |
6db4063c AD |
3365 | __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), |
3366 | __ATTR(name, S_IRUGO, show_name, NULL), | |
3367 | }; | |
3368 | ||
805952a8 | 3369 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c AD |
3370 | { |
3371 | int i; | |
928e964f | 3372 | int error = 0; |
6db4063c | 3373 | |
928e964f | 3374 | con->flag |= CON_DRIVER_FLAG_ATTR; |
805952a8 GKH |
3375 | dev_set_drvdata(con->dev, con); |
3376 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { | |
3377 | error = device_create_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3378 | if (error) |
3379 | break; | |
3380 | } | |
6db4063c | 3381 | |
928e964f AD |
3382 | if (error) { |
3383 | while (--i >= 0) | |
805952a8 | 3384 | device_remove_file(con->dev, &device_attrs[i]); |
928e964f AD |
3385 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3386 | } | |
3387 | ||
3388 | return error; | |
6db4063c AD |
3389 | } |
3390 | ||
805952a8 | 3391 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c AD |
3392 | { |
3393 | int i; | |
3394 | ||
928e964f | 3395 | if (con->flag & CON_DRIVER_FLAG_ATTR) { |
805952a8 GKH |
3396 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) |
3397 | device_remove_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3398 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3399 | } | |
6db4063c AD |
3400 | } |
3401 | ||
3e795de7 AD |
3402 | /** |
3403 | * con_is_bound - checks if driver is bound to the console | |
3404 | * @csw: console driver | |
3405 | * | |
3406 | * RETURNS: zero if unbound, nonzero if bound | |
3407 | * | |
3408 | * Drivers can call this and if zero, they should release | |
3409 | * all resources allocated on con_startup() | |
3410 | */ | |
3411 | int con_is_bound(const struct consw *csw) | |
3412 | { | |
3413 | int i, bound = 0; | |
3414 | ||
3415 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3416 | if (con_driver_map[i] == csw) { | |
3417 | bound = 1; | |
3418 | break; | |
3419 | } | |
3420 | } | |
3421 | ||
3422 | return bound; | |
3423 | } | |
3424 | EXPORT_SYMBOL(con_is_bound); | |
3425 | ||
b45cfba4 JB |
3426 | /** |
3427 | * con_debug_enter - prepare the console for the kernel debugger | |
3428 | * @sw: console driver | |
3429 | * | |
3430 | * Called when the console is taken over by the kernel debugger, this | |
3431 | * function needs to save the current console state, then put the console | |
3432 | * into a state suitable for the kernel debugger. | |
3433 | * | |
3434 | * RETURNS: | |
3435 | * Zero on success, nonzero if a failure occurred when trying to prepare | |
3436 | * the console for the debugger. | |
3437 | */ | |
3438 | int con_debug_enter(struct vc_data *vc) | |
3439 | { | |
3440 | int ret = 0; | |
3441 | ||
3442 | saved_fg_console = fg_console; | |
3443 | saved_last_console = last_console; | |
3444 | saved_want_console = want_console; | |
3445 | saved_vc_mode = vc->vc_mode; | |
beed5336 | 3446 | saved_console_blanked = console_blanked; |
b45cfba4 JB |
3447 | vc->vc_mode = KD_TEXT; |
3448 | console_blanked = 0; | |
3449 | if (vc->vc_sw->con_debug_enter) | |
3450 | ret = vc->vc_sw->con_debug_enter(vc); | |
81d44507 JW |
3451 | #ifdef CONFIG_KGDB_KDB |
3452 | /* Set the initial LINES variable if it is not already set */ | |
3453 | if (vc->vc_rows < 999) { | |
3454 | int linecount; | |
3455 | char lns[4]; | |
3456 | const char *setargs[3] = { | |
3457 | "set", | |
3458 | "LINES", | |
3459 | lns, | |
3460 | }; | |
3461 | if (kdbgetintenv(setargs[0], &linecount)) { | |
3462 | snprintf(lns, 4, "%i", vc->vc_rows); | |
3463 | kdb_set(2, setargs); | |
3464 | } | |
3465 | } | |
3466 | #endif /* CONFIG_KGDB_KDB */ | |
b45cfba4 JB |
3467 | return ret; |
3468 | } | |
3469 | EXPORT_SYMBOL_GPL(con_debug_enter); | |
3470 | ||
3471 | /** | |
3472 | * con_debug_leave - restore console state | |
3473 | * @sw: console driver | |
3474 | * | |
3475 | * Restore the console state to what it was before the kernel debugger | |
3476 | * was invoked. | |
3477 | * | |
3478 | * RETURNS: | |
3479 | * Zero on success, nonzero if a failure occurred when trying to restore | |
3480 | * the console. | |
3481 | */ | |
3482 | int con_debug_leave(void) | |
3483 | { | |
3484 | struct vc_data *vc; | |
3485 | int ret = 0; | |
3486 | ||
3487 | fg_console = saved_fg_console; | |
3488 | last_console = saved_last_console; | |
3489 | want_console = saved_want_console; | |
beed5336 | 3490 | console_blanked = saved_console_blanked; |
b45cfba4 JB |
3491 | vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
3492 | ||
3493 | vc = vc_cons[fg_console].d; | |
3494 | if (vc->vc_sw->con_debug_leave) | |
3495 | ret = vc->vc_sw->con_debug_leave(vc); | |
3496 | return ret; | |
3497 | } | |
3498 | EXPORT_SYMBOL_GPL(con_debug_leave); | |
3499 | ||
3e795de7 AD |
3500 | /** |
3501 | * register_con_driver - register console driver to console layer | |
3502 | * @csw: console driver | |
3503 | * @first: the first console to take over, minimum value is 0 | |
3504 | * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 | |
3505 | * | |
3506 | * DESCRIPTION: This function registers a console driver which can later | |
3507 | * bind to a range of consoles specified by @first and @last. It will | |
3508 | * also initialize the console driver by calling con_startup(). | |
3509 | */ | |
3510 | int register_con_driver(const struct consw *csw, int first, int last) | |
3511 | { | |
3512 | struct module *owner = csw->owner; | |
3513 | struct con_driver *con_driver; | |
3514 | const char *desc; | |
3515 | int i, retval = 0; | |
3516 | ||
3517 | if (!try_module_get(owner)) | |
3518 | return -ENODEV; | |
3519 | ||
ac751efa | 3520 | console_lock(); |
3e795de7 AD |
3521 | |
3522 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3523 | con_driver = ®istered_con_driver[i]; | |
3524 | ||
3525 | /* already registered */ | |
3526 | if (con_driver->con == csw) | |
c55c63c6 | 3527 | retval = -EBUSY; |
3e795de7 AD |
3528 | } |
3529 | ||
3530 | if (retval) | |
3531 | goto err; | |
3532 | ||
3533 | desc = csw->con_startup(); | |
3534 | ||
3535 | if (!desc) | |
3536 | goto err; | |
3537 | ||
3538 | retval = -EINVAL; | |
3539 | ||
3540 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3541 | con_driver = ®istered_con_driver[i]; | |
3542 | ||
3543 | if (con_driver->con == NULL) { | |
3544 | con_driver->con = csw; | |
3545 | con_driver->desc = desc; | |
6db4063c AD |
3546 | con_driver->node = i; |
3547 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
3548 | CON_DRIVER_FLAG_INIT; |
3549 | con_driver->first = first; | |
3550 | con_driver->last = last; | |
3551 | retval = 0; | |
3552 | break; | |
3553 | } | |
3554 | } | |
3555 | ||
6db4063c AD |
3556 | if (retval) |
3557 | goto err; | |
3558 | ||
d81ed103 | 3559 | con_driver->dev = device_create(vtconsole_class, NULL, |
47aa5793 GKH |
3560 | MKDEV(0, con_driver->node), |
3561 | NULL, "vtcon%i", | |
3562 | con_driver->node); | |
6db4063c | 3563 | |
805952a8 GKH |
3564 | if (IS_ERR(con_driver->dev)) { |
3565 | printk(KERN_WARNING "Unable to create device for %s; " | |
6db4063c | 3566 | "errno = %ld\n", con_driver->desc, |
805952a8 GKH |
3567 | PTR_ERR(con_driver->dev)); |
3568 | con_driver->dev = NULL; | |
6db4063c | 3569 | } else { |
805952a8 | 3570 | vtconsole_init_device(con_driver); |
6db4063c | 3571 | } |
928e964f | 3572 | |
3e795de7 | 3573 | err: |
ac751efa | 3574 | console_unlock(); |
3e795de7 AD |
3575 | module_put(owner); |
3576 | return retval; | |
3577 | } | |
3578 | EXPORT_SYMBOL(register_con_driver); | |
3579 | ||
3580 | /** | |
3581 | * unregister_con_driver - unregister console driver from console layer | |
3582 | * @csw: console driver | |
3583 | * | |
3584 | * DESCRIPTION: All drivers that registers to the console layer must | |
3585 | * call this function upon exit, or if the console driver is in a state | |
3586 | * where it won't be able to handle console services, such as the | |
3587 | * framebuffer console without loaded framebuffer drivers. | |
3588 | * | |
3589 | * The driver must unbind first prior to unregistration. | |
3590 | */ | |
3591 | int unregister_con_driver(const struct consw *csw) | |
3592 | { | |
3593 | int i, retval = -ENODEV; | |
3594 | ||
ac751efa | 3595 | console_lock(); |
3e795de7 AD |
3596 | |
3597 | /* cannot unregister a bound driver */ | |
3598 | if (con_is_bound(csw)) | |
3599 | goto err; | |
3600 | ||
3601 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3602 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3603 | ||
3604 | if (con_driver->con == csw && | |
6db4063c | 3605 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
805952a8 GKH |
3606 | vtconsole_deinit_device(con_driver); |
3607 | device_destroy(vtconsole_class, | |
3608 | MKDEV(0, con_driver->node)); | |
3e795de7 AD |
3609 | con_driver->con = NULL; |
3610 | con_driver->desc = NULL; | |
805952a8 | 3611 | con_driver->dev = NULL; |
6db4063c | 3612 | con_driver->node = 0; |
3e795de7 AD |
3613 | con_driver->flag = 0; |
3614 | con_driver->first = 0; | |
3615 | con_driver->last = 0; | |
3616 | retval = 0; | |
3617 | break; | |
3618 | } | |
3619 | } | |
3e795de7 | 3620 | err: |
ac751efa | 3621 | console_unlock(); |
3e795de7 AD |
3622 | return retval; |
3623 | } | |
3624 | EXPORT_SYMBOL(unregister_con_driver); | |
3625 | ||
3626 | /* | |
3627 | * If we support more console drivers, this function is used | |
3628 | * when a driver wants to take over some existing consoles | |
3629 | * and become default driver for newly opened ones. | |
3630 | * | |
3631 | * take_over_console is basically a register followed by unbind | |
3632 | */ | |
3633 | int take_over_console(const struct consw *csw, int first, int last, int deflt) | |
3634 | { | |
3635 | int err; | |
3636 | ||
3637 | err = register_con_driver(csw, first, last); | |
c55c63c6 DA |
3638 | /* if we get an busy error we still want to bind the console driver |
3639 | * and return success, as we may have unbound the console driver | |
3640 | Â * but not unregistered it. | |
3641 | */ | |
3642 | if (err == -EBUSY) | |
3643 | err = 0; | |
3e795de7 | 3644 | if (!err) |
6db4063c | 3645 | bind_con_driver(csw, first, last, deflt); |
3e795de7 AD |
3646 | |
3647 | return err; | |
3648 | } | |
3649 | ||
3650 | /* | |
3651 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
3652 | * work if driver is fully unbound. | |
3653 | */ | |
3654 | void give_up_console(const struct consw *csw) | |
3655 | { | |
3656 | unregister_con_driver(csw); | |
3657 | } | |
3658 | ||
6db4063c | 3659 | static int __init vtconsole_class_init(void) |
3e795de7 | 3660 | { |
6db4063c | 3661 | int i; |
3e795de7 | 3662 | |
6db4063c AD |
3663 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
3664 | if (IS_ERR(vtconsole_class)) { | |
3665 | printk(KERN_WARNING "Unable to create vt console class; " | |
3666 | "errno = %ld\n", PTR_ERR(vtconsole_class)); | |
3667 | vtconsole_class = NULL; | |
3668 | } | |
3e795de7 | 3669 | |
6db4063c | 3670 | /* Add system drivers to sysfs */ |
3e795de7 AD |
3671 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3672 | struct con_driver *con = ®istered_con_driver[i]; | |
3673 | ||
805952a8 | 3674 | if (con->con && !con->dev) { |
d81ed103 | 3675 | con->dev = device_create(vtconsole_class, NULL, |
47aa5793 GKH |
3676 | MKDEV(0, con->node), |
3677 | NULL, "vtcon%i", | |
3678 | con->node); | |
6db4063c | 3679 | |
805952a8 | 3680 | if (IS_ERR(con->dev)) { |
6db4063c | 3681 | printk(KERN_WARNING "Unable to create " |
805952a8 GKH |
3682 | "device for %s; errno = %ld\n", |
3683 | con->desc, PTR_ERR(con->dev)); | |
3684 | con->dev = NULL; | |
6db4063c | 3685 | } else { |
805952a8 | 3686 | vtconsole_init_device(con); |
6db4063c | 3687 | } |
3e795de7 | 3688 | } |
3e795de7 AD |
3689 | } |
3690 | ||
3e795de7 AD |
3691 | return 0; |
3692 | } | |
6db4063c | 3693 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 3694 | |
1da177e4 LT |
3695 | #endif |
3696 | ||
3697 | /* | |
3698 | * Screen blanking | |
3699 | */ | |
3700 | ||
403aac96 | 3701 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 3702 | { |
403aac96 YY |
3703 | unsigned int mode; |
3704 | ||
3705 | if (get_user(mode, p + 1)) | |
3706 | return -EFAULT; | |
3707 | ||
3708 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
3709 | return 0; | |
1da177e4 LT |
3710 | } |
3711 | ||
1da177e4 LT |
3712 | void do_blank_screen(int entering_gfx) |
3713 | { | |
3714 | struct vc_data *vc = vc_cons[fg_console].d; | |
3715 | int i; | |
3716 | ||
3717 | WARN_CONSOLE_UNLOCKED(); | |
3718 | ||
3719 | if (console_blanked) { | |
3720 | if (blank_state == blank_vesa_wait) { | |
3721 | blank_state = blank_off; | |
d060a321 | 3722 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
3723 | } |
3724 | return; | |
3725 | } | |
1da177e4 LT |
3726 | |
3727 | /* entering graphics mode? */ | |
3728 | if (entering_gfx) { | |
3729 | hide_cursor(vc); | |
3730 | save_screen(vc); | |
3731 | vc->vc_sw->con_blank(vc, -1, 1); | |
3732 | console_blanked = fg_console + 1; | |
b6e8f00f | 3733 | blank_state = blank_off; |
1da177e4 LT |
3734 | set_origin(vc); |
3735 | return; | |
3736 | } | |
3737 | ||
b6e8f00f | 3738 | if (blank_state != blank_normal_wait) |
3739 | return; | |
3740 | blank_state = blank_off; | |
3741 | ||
1da177e4 LT |
3742 | /* don't blank graphics */ |
3743 | if (vc->vc_mode != KD_TEXT) { | |
3744 | console_blanked = fg_console + 1; | |
3745 | return; | |
3746 | } | |
3747 | ||
3748 | hide_cursor(vc); | |
3749 | del_timer_sync(&console_timer); | |
3750 | blank_timer_expired = 0; | |
3751 | ||
3752 | save_screen(vc); | |
3753 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 3754 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
3755 | console_blanked = fg_console + 1; |
3756 | if (i) | |
3757 | set_origin(vc); | |
3758 | ||
3759 | if (console_blank_hook && console_blank_hook(1)) | |
3760 | return; | |
3761 | ||
d060a321 | 3762 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 3763 | blank_state = blank_vesa_wait; |
1da177e4 LT |
3764 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
3765 | } | |
8b92e87d | 3766 | vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3767 | } |
3768 | EXPORT_SYMBOL(do_blank_screen); | |
3769 | ||
3770 | /* | |
3771 | * Called by timer as well as from vt_console_driver | |
3772 | */ | |
3773 | void do_unblank_screen(int leaving_gfx) | |
3774 | { | |
3775 | struct vc_data *vc; | |
3776 | ||
3777 | /* This should now always be called from a "sane" (read: can schedule) | |
3778 | * context for the sake of the low level drivers, except in the special | |
3779 | * case of oops_in_progress | |
3780 | */ | |
3781 | if (!oops_in_progress) | |
3782 | might_sleep(); | |
3783 | ||
3784 | WARN_CONSOLE_UNLOCKED(); | |
3785 | ||
3786 | ignore_poke = 0; | |
3787 | if (!console_blanked) | |
3788 | return; | |
3789 | if (!vc_cons_allocated(fg_console)) { | |
3790 | /* impossible */ | |
1ffdda95 MSB |
3791 | pr_warning("unblank_screen: tty %d not allocated ??\n", |
3792 | fg_console+1); | |
1da177e4 LT |
3793 | return; |
3794 | } | |
3795 | vc = vc_cons[fg_console].d; | |
8fd4bd22 JB |
3796 | /* Try to unblank in oops case too */ |
3797 | if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) | |
1da177e4 LT |
3798 | return; /* but leave console_blanked != 0 */ |
3799 | ||
3800 | if (blankinterval) { | |
f324edc8 | 3801 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3802 | blank_state = blank_normal_wait; |
3803 | } | |
3804 | ||
3805 | console_blanked = 0; | |
8fd4bd22 | 3806 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) |
1da177e4 LT |
3807 | /* Low-level driver cannot restore -> do it ourselves */ |
3808 | update_screen(vc); | |
3809 | if (console_blank_hook) | |
3810 | console_blank_hook(0); | |
3811 | set_palette(vc); | |
3812 | set_cursor(vc); | |
8b92e87d | 3813 | vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
3814 | } |
3815 | EXPORT_SYMBOL(do_unblank_screen); | |
3816 | ||
3817 | /* | |
3818 | * This is called by the outside world to cause a forced unblank, mostly for | |
3819 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
3820 | * call it with 1 as an argument and so force a mode restore... that may kill | |
3821 | * X or at least garbage the screen but would also make the Oops visible... | |
3822 | */ | |
3823 | void unblank_screen(void) | |
3824 | { | |
3825 | do_unblank_screen(0); | |
3826 | } | |
3827 | ||
3828 | /* | |
70522e12 | 3829 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 3830 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 3831 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 LT |
3832 | */ |
3833 | static void blank_screen_t(unsigned long dummy) | |
3834 | { | |
cc63b1e1 | 3835 | if (unlikely(!keventd_up())) { |
f324edc8 | 3836 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
cc63b1e1 JB |
3837 | return; |
3838 | } | |
1da177e4 LT |
3839 | blank_timer_expired = 1; |
3840 | schedule_work(&console_work); | |
3841 | } | |
3842 | ||
3843 | void poke_blanked_console(void) | |
3844 | { | |
3845 | WARN_CONSOLE_UNLOCKED(); | |
3846 | ||
3847 | /* Add this so we quickly catch whoever might call us in a non | |
3848 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
3849 | * atomic contexts and is allowed to schedule (with the special case | |
3850 | * of oops_in_progress, but that isn't of any concern for this | |
3851 | * function. --BenH. | |
3852 | */ | |
3853 | might_sleep(); | |
3854 | ||
3855 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
3856 | * at worse, we'll do a spurrious blank and it's unlikely | |
3857 | */ | |
3858 | del_timer(&console_timer); | |
3859 | blank_timer_expired = 0; | |
3860 | ||
3861 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
3862 | return; | |
3863 | if (console_blanked) | |
3864 | unblank_screen(); | |
3865 | else if (blankinterval) { | |
f324edc8 | 3866 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3867 | blank_state = blank_normal_wait; |
3868 | } | |
3869 | } | |
3870 | ||
3871 | /* | |
3872 | * Palettes | |
3873 | */ | |
3874 | ||
3875 | static void set_palette(struct vc_data *vc) | |
3876 | { | |
3877 | WARN_CONSOLE_UNLOCKED(); | |
3878 | ||
3879 | if (vc->vc_mode != KD_GRAPHICS) | |
3880 | vc->vc_sw->con_set_palette(vc, color_table); | |
3881 | } | |
3882 | ||
3883 | static int set_get_cmap(unsigned char __user *arg, int set) | |
3884 | { | |
3885 | int i, j, k; | |
3886 | ||
3887 | WARN_CONSOLE_UNLOCKED(); | |
3888 | ||
3889 | for (i = 0; i < 16; i++) | |
3890 | if (set) { | |
3891 | get_user(default_red[i], arg++); | |
3892 | get_user(default_grn[i], arg++); | |
3893 | get_user(default_blu[i], arg++); | |
3894 | } else { | |
3895 | put_user(default_red[i], arg++); | |
3896 | put_user(default_grn[i], arg++); | |
3897 | put_user(default_blu[i], arg++); | |
3898 | } | |
3899 | if (set) { | |
3900 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
3901 | if (vc_cons_allocated(i)) { | |
3902 | for (j = k = 0; j < 16; j++) { | |
3903 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
3904 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
3905 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
3906 | } | |
3907 | set_palette(vc_cons[i].d); | |
3908 | } | |
3909 | } | |
3910 | return 0; | |
3911 | } | |
3912 | ||
3913 | /* | |
3914 | * Load palette into the DAC registers. arg points to a colour | |
3915 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
3916 | */ | |
3917 | ||
3918 | int con_set_cmap(unsigned char __user *arg) | |
3919 | { | |
3920 | int rc; | |
3921 | ||
ac751efa | 3922 | console_lock(); |
1da177e4 | 3923 | rc = set_get_cmap (arg,1); |
ac751efa | 3924 | console_unlock(); |
1da177e4 LT |
3925 | |
3926 | return rc; | |
3927 | } | |
3928 | ||
3929 | int con_get_cmap(unsigned char __user *arg) | |
3930 | { | |
3931 | int rc; | |
3932 | ||
ac751efa | 3933 | console_lock(); |
1da177e4 | 3934 | rc = set_get_cmap (arg,0); |
ac751efa | 3935 | console_unlock(); |
1da177e4 LT |
3936 | |
3937 | return rc; | |
3938 | } | |
3939 | ||
3940 | void reset_palette(struct vc_data *vc) | |
3941 | { | |
3942 | int j, k; | |
3943 | for (j=k=0; j<16; j++) { | |
3944 | vc->vc_palette[k++] = default_red[j]; | |
3945 | vc->vc_palette[k++] = default_grn[j]; | |
3946 | vc->vc_palette[k++] = default_blu[j]; | |
3947 | } | |
3948 | set_palette(vc); | |
3949 | } | |
3950 | ||
3951 | /* | |
3952 | * Font switching | |
3953 | * | |
3954 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
3955 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
3956 | * depending on width) reserved for each character which is kinda wasty, but | |
3957 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
25985edc | 3958 | * is up to the actual low-level console-driver convert data into its favorite |
1da177e4 LT |
3959 | * format (maybe we should add a `fontoffset' field to the `display' |
3960 | * structure so we won't have to convert the fontdata all the time. | |
3961 | * /Jes | |
3962 | */ | |
3963 | ||
3964 | #define max_font_size 65536 | |
3965 | ||
3966 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
3967 | { | |
3968 | struct console_font font; | |
3969 | int rc = -EINVAL; | |
3970 | int c; | |
3971 | ||
3972 | if (vc->vc_mode != KD_TEXT) | |
3973 | return -EINVAL; | |
3974 | ||
3975 | if (op->data) { | |
3976 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
3977 | if (!font.data) | |
3978 | return -ENOMEM; | |
3979 | } else | |
3980 | font.data = NULL; | |
3981 | ||
ac751efa | 3982 | console_lock(); |
1da177e4 LT |
3983 | if (vc->vc_sw->con_font_get) |
3984 | rc = vc->vc_sw->con_font_get(vc, &font); | |
3985 | else | |
3986 | rc = -ENOSYS; | |
ac751efa | 3987 | console_unlock(); |
1da177e4 LT |
3988 | |
3989 | if (rc) | |
3990 | goto out; | |
3991 | ||
3992 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 3993 | |
1da177e4 LT |
3994 | if (op->data && font.charcount > op->charcount) |
3995 | rc = -ENOSPC; | |
3996 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
3997 | if (font.width > op->width || font.height > op->height) | |
3998 | rc = -ENOSPC; | |
3999 | } else { | |
4000 | if (font.width != 8) | |
4001 | rc = -EIO; | |
4002 | else if ((op->height && font.height > op->height) || | |
4003 | font.height > 32) | |
4004 | rc = -ENOSPC; | |
4005 | } | |
4006 | if (rc) | |
4007 | goto out; | |
4008 | ||
4009 | op->height = font.height; | |
4010 | op->width = font.width; | |
4011 | op->charcount = font.charcount; | |
4012 | ||
4013 | if (op->data && copy_to_user(op->data, font.data, c)) | |
4014 | rc = -EFAULT; | |
4015 | ||
4016 | out: | |
4017 | kfree(font.data); | |
4018 | return rc; | |
4019 | } | |
4020 | ||
4021 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
4022 | { | |
4023 | struct console_font font; | |
4024 | int rc = -EINVAL; | |
4025 | int size; | |
4026 | ||
4027 | if (vc->vc_mode != KD_TEXT) | |
4028 | return -EINVAL; | |
4029 | if (!op->data) | |
4030 | return -EINVAL; | |
4031 | if (op->charcount > 512) | |
4032 | return -EINVAL; | |
4033 | if (!op->height) { /* Need to guess font height [compat] */ | |
4034 | int h, i; | |
4035 | u8 __user *charmap = op->data; | |
4036 | u8 tmp; | |
4037 | ||
4038 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, | |
4039 | so that we can get rid of this soon */ | |
4040 | if (!(op->flags & KD_FONT_FLAG_OLD)) | |
4041 | return -EINVAL; | |
4042 | for (h = 32; h > 0; h--) | |
4043 | for (i = 0; i < op->charcount; i++) { | |
4044 | if (get_user(tmp, &charmap[32*i+h-1])) | |
4045 | return -EFAULT; | |
4046 | if (tmp) | |
4047 | goto nonzero; | |
4048 | } | |
4049 | return -EINVAL; | |
4050 | nonzero: | |
4051 | op->height = h; | |
4052 | } | |
4053 | if (op->width <= 0 || op->width > 32 || op->height > 32) | |
4054 | return -EINVAL; | |
4055 | size = (op->width+7)/8 * 32 * op->charcount; | |
4056 | if (size > max_font_size) | |
4057 | return -ENOSPC; | |
4058 | font.charcount = op->charcount; | |
4059 | font.height = op->height; | |
4060 | font.width = op->width; | |
9b71ca20 JL |
4061 | font.data = memdup_user(op->data, size); |
4062 | if (IS_ERR(font.data)) | |
4063 | return PTR_ERR(font.data); | |
ac751efa | 4064 | console_lock(); |
1da177e4 LT |
4065 | if (vc->vc_sw->con_font_set) |
4066 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); | |
4067 | else | |
4068 | rc = -ENOSYS; | |
ac751efa | 4069 | console_unlock(); |
1da177e4 LT |
4070 | kfree(font.data); |
4071 | return rc; | |
4072 | } | |
4073 | ||
4074 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
4075 | { | |
4076 | struct console_font font = {.width = op->width, .height = op->height}; | |
4077 | char name[MAX_FONT_NAME]; | |
4078 | char *s = name; | |
4079 | int rc; | |
4080 | ||
4081 | if (vc->vc_mode != KD_TEXT) | |
4082 | return -EINVAL; | |
4083 | ||
4084 | if (!op->data) | |
4085 | s = NULL; | |
4086 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
4087 | return -EFAULT; | |
4088 | else | |
4089 | name[MAX_FONT_NAME - 1] = 0; | |
4090 | ||
ac751efa | 4091 | console_lock(); |
1da177e4 LT |
4092 | if (vc->vc_sw->con_font_default) |
4093 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
4094 | else | |
4095 | rc = -ENOSYS; | |
ac751efa | 4096 | console_unlock(); |
1da177e4 LT |
4097 | if (!rc) { |
4098 | op->width = font.width; | |
4099 | op->height = font.height; | |
4100 | } | |
4101 | return rc; | |
4102 | } | |
4103 | ||
4104 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4105 | { | |
4106 | int con = op->height; | |
4107 | int rc; | |
4108 | ||
4109 | if (vc->vc_mode != KD_TEXT) | |
4110 | return -EINVAL; | |
4111 | ||
ac751efa | 4112 | console_lock(); |
1da177e4 LT |
4113 | if (!vc->vc_sw->con_font_copy) |
4114 | rc = -ENOSYS; | |
4115 | else if (con < 0 || !vc_cons_allocated(con)) | |
4116 | rc = -ENOTTY; | |
4117 | else if (con == vc->vc_num) /* nothing to do */ | |
4118 | rc = 0; | |
4119 | else | |
4120 | rc = vc->vc_sw->con_font_copy(vc, con); | |
ac751efa | 4121 | console_unlock(); |
1da177e4 LT |
4122 | return rc; |
4123 | } | |
4124 | ||
4125 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4126 | { | |
4127 | switch (op->op) { | |
4128 | case KD_FONT_OP_SET: | |
4129 | return con_font_set(vc, op); | |
4130 | case KD_FONT_OP_GET: | |
4131 | return con_font_get(vc, op); | |
4132 | case KD_FONT_OP_SET_DEFAULT: | |
4133 | return con_font_default(vc, op); | |
4134 | case KD_FONT_OP_COPY: | |
4135 | return con_font_copy(vc, op); | |
4136 | } | |
4137 | return -ENOSYS; | |
4138 | } | |
4139 | ||
4140 | /* | |
4141 | * Interface exported to selection and vcs. | |
4142 | */ | |
4143 | ||
4144 | /* used by selection */ | |
4145 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4146 | { | |
4147 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4148 | u16 c = w & 0xff; | |
4149 | ||
4150 | if (w & vc->vc_hi_font_mask) | |
4151 | c |= 0x100; | |
4152 | return c; | |
4153 | } | |
f7511d5f | 4154 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 LT |
4155 | |
4156 | /* used by vcs - note the word offset */ | |
4157 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4158 | { | |
4159 | return screenpos(vc, 2 * w_offset, viewed); | |
4160 | } | |
4161 | ||
4162 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4163 | { | |
4164 | p[0] = vc->vc_x; | |
4165 | p[1] = vc->vc_y; | |
4166 | } | |
4167 | ||
4168 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4169 | { | |
9477e260 | 4170 | hide_cursor(vc); |
1da177e4 LT |
4171 | gotoxy(vc, p[0], p[1]); |
4172 | set_cursor(vc); | |
4173 | } | |
4174 | ||
4175 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4176 | { | |
4177 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4178 | return softcursor_original; | |
4179 | return scr_readw(org); | |
4180 | } | |
4181 | ||
4182 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4183 | { | |
4184 | scr_writew(val, org); | |
4185 | if ((unsigned long)org == vc->vc_pos) { | |
4186 | softcursor_original = -1; | |
4187 | add_softcursor(vc); | |
4188 | } | |
4189 | } | |
4190 | ||
432c9ed2 NP |
4191 | void vcs_scr_updated(struct vc_data *vc) |
4192 | { | |
4193 | notify_update(vc); | |
4194 | } | |
4195 | ||
1da177e4 LT |
4196 | /* |
4197 | * Visible symbols for modules | |
4198 | */ | |
4199 | ||
4200 | EXPORT_SYMBOL(color_table); | |
4201 | EXPORT_SYMBOL(default_red); | |
4202 | EXPORT_SYMBOL(default_grn); | |
4203 | EXPORT_SYMBOL(default_blu); | |
4204 | EXPORT_SYMBOL(update_region); | |
4205 | EXPORT_SYMBOL(redraw_screen); | |
4206 | EXPORT_SYMBOL(vc_resize); | |
4207 | EXPORT_SYMBOL(fg_console); | |
4208 | EXPORT_SYMBOL(console_blank_hook); | |
4209 | EXPORT_SYMBOL(console_blanked); | |
4210 | EXPORT_SYMBOL(vc_cons); | |
f6c06b68 | 4211 | EXPORT_SYMBOL(global_cursor_default); |
1da177e4 LT |
4212 | #ifndef VT_SINGLE_DRIVER |
4213 | EXPORT_SYMBOL(take_over_console); | |
4214 | EXPORT_SYMBOL(give_up_console); | |
4215 | #endif |