Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/vt.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Hopefully this will be a rather complete VT102 implementation. | |
9 | * | |
10 | * Beeping thanks to John T Kohl. | |
11 | * | |
12 | * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics | |
13 | * Chars, and VT100 enhancements by Peter MacDonald. | |
14 | * | |
15 | * Copy and paste function by Andrew Haylett, | |
16 | * some enhancements by Alessandro Rubini. | |
17 | * | |
18 | * Code to check for different video-cards mostly by Galen Hunt, | |
19 | * <g-hunt@ee.utah.edu> | |
20 | * | |
21 | * Rudimentary ISO 10646/Unicode/UTF-8 character set support by | |
22 | * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. | |
23 | * | |
24 | * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 | |
25 | * Resizing of consoles, aeb, 940926 | |
26 | * | |
27 | * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 | |
28 | * <poe@daimi.aau.dk> | |
29 | * | |
30 | * User-defined bell sound, new setterm control sequences and printk | |
31 | * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 | |
32 | * | |
33 | * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> | |
34 | * | |
35 | * Merge with the abstract console driver by Geert Uytterhoeven | |
36 | * <geert@linux-m68k.org>, Jan 1997. | |
37 | * | |
38 | * Original m68k console driver modifications by | |
39 | * | |
40 | * - Arno Griffioen <arno@usn.nl> | |
41 | * - David Carter <carter@cs.bris.ac.uk> | |
42 | * | |
43 | * The abstract console driver provides a generic interface for a text | |
44 | * console. It supports VGA text mode, frame buffer based graphical consoles | |
45 | * and special graphics processors that are only accessible through some | |
46 | * registers (e.g. a TMS340x0 GSP). | |
47 | * | |
48 | * The interface to the hardware is specified using a special structure | |
49 | * (struct consw) which contains function pointers to console operations | |
50 | * (see <linux/console.h> for more information). | |
51 | * | |
52 | * Support for changeable cursor shape | |
53 | * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 | |
54 | * | |
55 | * Ported to i386 and con_scrolldelta fixed | |
56 | * by Emmanuel Marty <core@ggi-project.org>, April 1998 | |
57 | * | |
58 | * Resurrected character buffers in videoram plus lots of other trickery | |
59 | * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 | |
60 | * | |
61 | * Removed old-style timers, introduced console_timer, made timer | |
62 | * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au> | |
63 | * | |
64 | * Removed console_lock, enabled interrupts across all console operations | |
65 | * 13 March 2001, Andrew Morton | |
d4328b40 AT |
66 | * |
67 | * Fixed UTF-8 mode so alternate charset modes always work according | |
68 | * to control sequences interpreted in do_con_trol function | |
69 | * preserving backward VT100 semigraphics compatibility, | |
70 | * malformed UTF sequences represented as sequences of replacement glyphs, | |
71 | * original codes or '?' as a last resort if replacement glyph is undefined | |
72 | * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 | |
1da177e4 LT |
73 | */ |
74 | ||
75 | #include <linux/module.h> | |
76 | #include <linux/types.h> | |
77 | #include <linux/sched.h> | |
78 | #include <linux/tty.h> | |
79 | #include <linux/tty_flip.h> | |
80 | #include <linux/kernel.h> | |
81 | #include <linux/string.h> | |
82 | #include <linux/errno.h> | |
83 | #include <linux/kd.h> | |
84 | #include <linux/slab.h> | |
85 | #include <linux/major.h> | |
86 | #include <linux/mm.h> | |
87 | #include <linux/console.h> | |
88 | #include <linux/init.h> | |
c831c338 | 89 | #include <linux/mutex.h> |
1da177e4 LT |
90 | #include <linux/vt_kern.h> |
91 | #include <linux/selection.h> | |
92 | #include <linux/tiocl.h> | |
93 | #include <linux/kbd_kern.h> | |
94 | #include <linux/consolemap.h> | |
95 | #include <linux/timer.h> | |
96 | #include <linux/interrupt.h> | |
1da177e4 LT |
97 | #include <linux/workqueue.h> |
98 | #include <linux/bootmem.h> | |
99 | #include <linux/pm.h> | |
100 | #include <linux/font.h> | |
101 | #include <linux/bitops.h> | |
b293d758 | 102 | #include <linux/notifier.h> |
1da177e4 LT |
103 | |
104 | #include <asm/io.h> | |
105 | #include <asm/system.h> | |
106 | #include <asm/uaccess.h> | |
107 | ||
3e795de7 | 108 | #define MAX_NR_CON_DRIVER 16 |
1da177e4 | 109 | |
6db4063c | 110 | #define CON_DRIVER_FLAG_MODULE 1 |
928e964f AD |
111 | #define CON_DRIVER_FLAG_INIT 2 |
112 | #define CON_DRIVER_FLAG_ATTR 4 | |
3e795de7 AD |
113 | |
114 | struct con_driver { | |
115 | const struct consw *con; | |
116 | const char *desc; | |
805952a8 | 117 | struct device *dev; |
6db4063c | 118 | int node; |
3e795de7 AD |
119 | int first; |
120 | int last; | |
121 | int flag; | |
122 | }; | |
123 | ||
124 | static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; | |
1da177e4 LT |
125 | const struct consw *conswitchp; |
126 | ||
127 | /* A bitmap for codes <32. A bit of 1 indicates that the code | |
128 | * corresponding to that bit number invokes some special action | |
129 | * (such as cursor movement) and should not be displayed as a | |
130 | * glyph unless the disp_ctrl mode is explicitly enabled. | |
131 | */ | |
132 | #define CTRL_ACTION 0x0d00ff81 | |
133 | #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ | |
134 | ||
135 | /* | |
136 | * Here is the default bell parameters: 750HZ, 1/8th of a second | |
137 | */ | |
138 | #define DEFAULT_BELL_PITCH 750 | |
139 | #define DEFAULT_BELL_DURATION (HZ/8) | |
140 | ||
1da177e4 LT |
141 | struct vc vc_cons [MAX_NR_CONSOLES]; |
142 | ||
143 | #ifndef VT_SINGLE_DRIVER | |
144 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; | |
145 | #endif | |
146 | ||
147 | static int con_open(struct tty_struct *, struct file *); | |
148 | static void vc_init(struct vc_data *vc, unsigned int rows, | |
149 | unsigned int cols, int do_clear); | |
150 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); | |
151 | static void save_cur(struct vc_data *vc); | |
152 | static void reset_terminal(struct vc_data *vc, int do_clear); | |
153 | static void con_flush_chars(struct tty_struct *tty); | |
403aac96 | 154 | static int set_vesa_blanking(char __user *p); |
1da177e4 LT |
155 | static void set_cursor(struct vc_data *vc); |
156 | static void hide_cursor(struct vc_data *vc); | |
65f27f38 | 157 | static void console_callback(struct work_struct *ignored); |
1da177e4 LT |
158 | static void blank_screen_t(unsigned long dummy); |
159 | static void set_palette(struct vc_data *vc); | |
160 | ||
161 | static int printable; /* Is console ready for printing? */ | |
77bf2bab | 162 | int default_utf8 = true; |
042f10ec | 163 | module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
164 | |
165 | /* | |
166 | * ignore_poke: don't unblank the screen when things are typed. This is | |
167 | * mainly for the privacy of braille terminal users. | |
168 | */ | |
169 | static int ignore_poke; | |
170 | ||
171 | int do_poke_blanked_console; | |
172 | int console_blanked; | |
173 | ||
174 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ | |
175 | static int blankinterval = 10*60*HZ; | |
176 | static int vesa_off_interval; | |
177 | ||
65f27f38 | 178 | static DECLARE_WORK(console_work, console_callback); |
1da177e4 LT |
179 | |
180 | /* | |
181 | * fg_console is the current virtual console, | |
182 | * last_console is the last used one, | |
183 | * want_console is the console we want to switch to, | |
184 | * kmsg_redirect is the console for kernel messages, | |
185 | */ | |
186 | int fg_console; | |
187 | int last_console; | |
188 | int want_console = -1; | |
189 | int kmsg_redirect; | |
190 | ||
191 | /* | |
192 | * For each existing display, we have a pointer to console currently visible | |
193 | * on that display, allowing consoles other than fg_console to be refreshed | |
194 | * appropriately. Unless the low-level driver supplies its own display_fg | |
195 | * variable, we use this one for the "master display". | |
196 | */ | |
197 | static struct vc_data *master_display_fg; | |
198 | ||
199 | /* | |
200 | * Unfortunately, we need to delay tty echo when we're currently writing to the | |
201 | * console since the code is (and always was) not re-entrant, so we schedule | |
202 | * all flip requests to process context with schedule-task() and run it from | |
203 | * console_callback(). | |
204 | */ | |
205 | ||
206 | /* | |
207 | * For the same reason, we defer scrollback to the console callback. | |
208 | */ | |
209 | static int scrollback_delta; | |
210 | ||
211 | /* | |
212 | * Hook so that the power management routines can (un)blank | |
213 | * the console on our behalf. | |
214 | */ | |
215 | int (*console_blank_hook)(int); | |
216 | ||
40565f19 | 217 | static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); |
1da177e4 LT |
218 | static int blank_state; |
219 | static int blank_timer_expired; | |
220 | enum { | |
221 | blank_off = 0, | |
222 | blank_normal_wait, | |
223 | blank_vesa_wait, | |
224 | }; | |
225 | ||
b293d758 ST |
226 | /* |
227 | * Notifier list for console events. | |
228 | */ | |
229 | static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); | |
230 | ||
231 | int register_vt_notifier(struct notifier_block *nb) | |
232 | { | |
233 | return atomic_notifier_chain_register(&vt_notifier_list, nb); | |
234 | } | |
235 | EXPORT_SYMBOL_GPL(register_vt_notifier); | |
236 | ||
237 | int unregister_vt_notifier(struct notifier_block *nb) | |
238 | { | |
239 | return atomic_notifier_chain_unregister(&vt_notifier_list, nb); | |
240 | } | |
241 | EXPORT_SYMBOL_GPL(unregister_vt_notifier); | |
242 | ||
243 | static void notify_write(struct vc_data *vc, unsigned int unicode) | |
244 | { | |
245 | struct vt_notifier_param param = { .vc = vc, unicode = unicode }; | |
246 | atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); | |
247 | } | |
248 | ||
249 | static void notify_update(struct vc_data *vc) | |
250 | { | |
251 | struct vt_notifier_param param = { .vc = vc }; | |
252 | atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); | |
253 | } | |
254 | ||
1da177e4 LT |
255 | /* |
256 | * Low-Level Functions | |
257 | */ | |
258 | ||
259 | #define IS_FG(vc) ((vc)->vc_num == fg_console) | |
260 | ||
261 | #ifdef VT_BUF_VRAM_ONLY | |
262 | #define DO_UPDATE(vc) 0 | |
263 | #else | |
f700d6e5 | 264 | #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) |
1da177e4 LT |
265 | #endif |
266 | ||
267 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) | |
268 | { | |
269 | unsigned short *p; | |
270 | ||
271 | if (!viewed) | |
272 | p = (unsigned short *)(vc->vc_origin + offset); | |
273 | else if (!vc->vc_sw->con_screen_pos) | |
274 | p = (unsigned short *)(vc->vc_visible_origin + offset); | |
275 | else | |
276 | p = vc->vc_sw->con_screen_pos(vc, offset); | |
277 | return p; | |
278 | } | |
279 | ||
280 | static inline void scrolldelta(int lines) | |
281 | { | |
282 | scrollback_delta += lines; | |
283 | schedule_console_callback(); | |
284 | } | |
285 | ||
286 | void schedule_console_callback(void) | |
287 | { | |
288 | schedule_work(&console_work); | |
289 | } | |
290 | ||
291 | static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
292 | { | |
293 | unsigned short *d, *s; | |
294 | ||
295 | if (t+nr >= b) | |
296 | nr = b - t - 1; | |
297 | if (b > vc->vc_rows || t >= b || nr < 1) | |
298 | return; | |
299 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) | |
300 | return; | |
301 | d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
302 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
303 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
c9e587ab | 304 | scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char, |
1da177e4 LT |
305 | vc->vc_size_row * nr); |
306 | } | |
307 | ||
308 | static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) | |
309 | { | |
310 | unsigned short *s; | |
311 | unsigned int step; | |
312 | ||
313 | if (t+nr >= b) | |
314 | nr = b - t - 1; | |
315 | if (b > vc->vc_rows || t >= b || nr < 1) | |
316 | return; | |
317 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) | |
318 | return; | |
319 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); | |
320 | step = vc->vc_cols * nr; | |
321 | scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); | |
c9e587ab | 322 | scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step); |
1da177e4 LT |
323 | } |
324 | ||
325 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
326 | { | |
327 | #ifndef VT_BUF_VRAM_ONLY | |
328 | unsigned int xx, yy, offset; | |
329 | u16 *p; | |
330 | ||
331 | p = (u16 *) start; | |
332 | if (!vc->vc_sw->con_getxy) { | |
333 | offset = (start - vc->vc_origin) / 2; | |
334 | xx = offset % vc->vc_cols; | |
335 | yy = offset / vc->vc_cols; | |
336 | } else { | |
337 | int nxx, nyy; | |
338 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
339 | xx = nxx; yy = nyy; | |
340 | } | |
341 | for(;;) { | |
342 | u16 attrib = scr_readw(p) & 0xff00; | |
343 | int startx = xx; | |
344 | u16 *q = p; | |
345 | while (xx < vc->vc_cols && count) { | |
346 | if (attrib != (scr_readw(p) & 0xff00)) { | |
347 | if (p > q) | |
348 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
349 | startx = xx; | |
350 | q = p; | |
351 | attrib = scr_readw(p) & 0xff00; | |
352 | } | |
353 | p++; | |
354 | xx++; | |
355 | count--; | |
356 | } | |
357 | if (p > q) | |
358 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
359 | if (!count) | |
360 | break; | |
361 | xx = 0; | |
362 | yy++; | |
363 | if (vc->vc_sw->con_getxy) { | |
364 | p = (u16 *)start; | |
365 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
366 | } | |
367 | } | |
368 | #endif | |
369 | } | |
370 | ||
371 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
372 | { | |
373 | WARN_CONSOLE_UNLOCKED(); | |
374 | ||
375 | if (DO_UPDATE(vc)) { | |
376 | hide_cursor(vc); | |
377 | do_update_region(vc, start, count); | |
378 | set_cursor(vc); | |
379 | } | |
380 | } | |
381 | ||
382 | /* Structure of attributes is hardware-dependent */ | |
383 | ||
fa6ce9ab JE |
384 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
385 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
386 | { |
387 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
388 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
389 | _blink, _underline, _reverse, _italic); | |
1da177e4 LT |
390 | |
391 | #ifndef VT_BUF_VRAM_ONLY | |
392 | /* | |
393 | * ++roman: I completely changed the attribute format for monochrome | |
394 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
395 | * adapter) format didn't allow the combination of certain effects. | |
396 | * Now the attribute is just a bit vector: | |
397 | * Bit 0..1: intensity (0..2) | |
398 | * Bit 2 : underline | |
399 | * Bit 3 : reverse | |
400 | * Bit 7 : blink | |
401 | */ | |
402 | { | |
c9e587ab | 403 | u8 a = _color; |
1da177e4 LT |
404 | if (!vc->vc_can_do_color) |
405 | return _intensity | | |
fa6ce9ab | 406 | (_italic ? 2 : 0) | |
1da177e4 LT |
407 | (_underline ? 4 : 0) | |
408 | (_reverse ? 8 : 0) | | |
409 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
410 | if (_italic) |
411 | a = (a & 0xF0) | vc->vc_itcolor; | |
412 | else if (_underline) | |
1da177e4 LT |
413 | a = (a & 0xf0) | vc->vc_ulcolor; |
414 | else if (_intensity == 0) | |
415 | a = (a & 0xf0) | vc->vc_ulcolor; | |
416 | if (_reverse) | |
417 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
418 | if (_blink) | |
419 | a ^= 0x80; | |
420 | if (_intensity == 2) | |
421 | a ^= 0x08; | |
422 | if (vc->vc_hi_font_mask == 0x100) | |
423 | a <<= 1; | |
424 | return a; | |
425 | } | |
426 | #else | |
427 | return 0; | |
428 | #endif | |
429 | } | |
430 | ||
431 | static void update_attr(struct vc_data *vc) | |
432 | { | |
fa6ce9ab JE |
433 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
434 | vc->vc_blink, vc->vc_underline, | |
435 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
436 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
774533b3 | 437 | vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, vc->vc_decscnm, false) << 8) | ' '; |
1da177e4 LT |
438 | } |
439 | ||
440 | /* Note: inverting the screen twice should revert to the original state */ | |
441 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
442 | { | |
443 | unsigned short *p; | |
444 | ||
445 | WARN_CONSOLE_UNLOCKED(); | |
446 | ||
447 | count /= 2; | |
448 | p = screenpos(vc, offset, viewed); | |
449 | if (vc->vc_sw->con_invert_region) | |
450 | vc->vc_sw->con_invert_region(vc, p, count); | |
451 | #ifndef VT_BUF_VRAM_ONLY | |
452 | else { | |
453 | u16 *q = p; | |
454 | int cnt = count; | |
455 | u16 a; | |
456 | ||
457 | if (!vc->vc_can_do_color) { | |
458 | while (cnt--) { | |
459 | a = scr_readw(q); | |
460 | a ^= 0x0800; | |
461 | scr_writew(a, q); | |
462 | q++; | |
463 | } | |
464 | } else if (vc->vc_hi_font_mask == 0x100) { | |
465 | while (cnt--) { | |
466 | a = scr_readw(q); | |
467 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
468 | scr_writew(a, q); | |
469 | q++; | |
470 | } | |
471 | } else { | |
472 | while (cnt--) { | |
473 | a = scr_readw(q); | |
474 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
475 | scr_writew(a, q); | |
476 | q++; | |
477 | } | |
478 | } | |
479 | } | |
480 | #endif | |
481 | if (DO_UPDATE(vc)) | |
482 | do_update_region(vc, (unsigned long) p, count); | |
483 | } | |
484 | ||
485 | /* used by selection: complement pointer position */ | |
486 | void complement_pos(struct vc_data *vc, int offset) | |
487 | { | |
414edcd3 | 488 | static int old_offset = -1; |
1da177e4 LT |
489 | static unsigned short old; |
490 | static unsigned short oldx, oldy; | |
491 | ||
492 | WARN_CONSOLE_UNLOCKED(); | |
493 | ||
414edcd3 AD |
494 | if (old_offset != -1 && old_offset >= 0 && |
495 | old_offset < vc->vc_screenbuf_size) { | |
496 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
1da177e4 LT |
497 | if (DO_UPDATE(vc)) |
498 | vc->vc_sw->con_putc(vc, old, oldy, oldx); | |
499 | } | |
414edcd3 AD |
500 | |
501 | old_offset = offset; | |
502 | ||
503 | if (offset != -1 && offset >= 0 && | |
504 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 505 | unsigned short new; |
414edcd3 | 506 | unsigned short *p; |
1da177e4 LT |
507 | p = screenpos(vc, offset, 1); |
508 | old = scr_readw(p); | |
509 | new = old ^ vc->vc_complement_mask; | |
510 | scr_writew(new, p); | |
511 | if (DO_UPDATE(vc)) { | |
512 | oldx = (offset >> 1) % vc->vc_cols; | |
513 | oldy = (offset >> 1) / vc->vc_cols; | |
514 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
515 | } | |
516 | } | |
414edcd3 | 517 | |
1da177e4 LT |
518 | } |
519 | ||
520 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
521 | { | |
522 | unsigned short *p, *q = (unsigned short *)vc->vc_pos; | |
523 | ||
524 | p = q + vc->vc_cols - nr - vc->vc_x; | |
525 | while (--p >= q) | |
526 | scr_writew(scr_readw(p), p + nr); | |
527 | scr_memsetw(q, vc->vc_video_erase_char, nr * 2); | |
528 | vc->vc_need_wrap = 0; | |
529 | if (DO_UPDATE(vc)) { | |
530 | unsigned short oldattr = vc->vc_attr; | |
531 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, | |
532 | vc->vc_cols - vc->vc_x - nr); | |
533 | vc->vc_attr = vc->vc_video_erase_char >> 8; | |
534 | while (nr--) | |
535 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); | |
536 | vc->vc_attr = oldattr; | |
537 | } | |
538 | } | |
539 | ||
540 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
541 | { | |
542 | unsigned int i = vc->vc_x; | |
543 | unsigned short *p = (unsigned short *)vc->vc_pos; | |
544 | ||
545 | while (++i <= vc->vc_cols - nr) { | |
546 | scr_writew(scr_readw(p+nr), p); | |
547 | p++; | |
548 | } | |
549 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); | |
550 | vc->vc_need_wrap = 0; | |
551 | if (DO_UPDATE(vc)) { | |
552 | unsigned short oldattr = vc->vc_attr; | |
553 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, | |
554 | vc->vc_cols - vc->vc_x - nr); | |
555 | vc->vc_attr = vc->vc_video_erase_char >> 8; | |
556 | while (nr--) | |
557 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, | |
558 | vc->vc_cols - 1 - nr); | |
559 | vc->vc_attr = oldattr; | |
560 | } | |
561 | } | |
562 | ||
563 | static int softcursor_original; | |
564 | ||
565 | static void add_softcursor(struct vc_data *vc) | |
566 | { | |
567 | int i = scr_readw((u16 *) vc->vc_pos); | |
568 | u32 type = vc->vc_cursor_type; | |
569 | ||
570 | if (! (type & 0x10)) return; | |
571 | if (softcursor_original != -1) return; | |
572 | softcursor_original = i; | |
573 | i |= ((type >> 8) & 0xff00 ); | |
574 | i ^= ((type) & 0xff00 ); | |
575 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
576 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
577 | scr_writew(i, (u16 *) vc->vc_pos); | |
578 | if (DO_UPDATE(vc)) | |
579 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); | |
580 | } | |
581 | ||
582 | static void hide_softcursor(struct vc_data *vc) | |
583 | { | |
584 | if (softcursor_original != -1) { | |
585 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
586 | if (DO_UPDATE(vc)) | |
587 | vc->vc_sw->con_putc(vc, softcursor_original, | |
588 | vc->vc_y, vc->vc_x); | |
589 | softcursor_original = -1; | |
590 | } | |
591 | } | |
592 | ||
593 | static void hide_cursor(struct vc_data *vc) | |
594 | { | |
595 | if (vc == sel_cons) | |
596 | clear_selection(); | |
597 | vc->vc_sw->con_cursor(vc, CM_ERASE); | |
598 | hide_softcursor(vc); | |
599 | } | |
600 | ||
601 | static void set_cursor(struct vc_data *vc) | |
602 | { | |
603 | if (!IS_FG(vc) || console_blanked || | |
604 | vc->vc_mode == KD_GRAPHICS) | |
605 | return; | |
606 | if (vc->vc_deccm) { | |
607 | if (vc == sel_cons) | |
608 | clear_selection(); | |
609 | add_softcursor(vc); | |
610 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
611 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
612 | } else | |
613 | hide_cursor(vc); | |
614 | } | |
615 | ||
616 | static void set_origin(struct vc_data *vc) | |
617 | { | |
618 | WARN_CONSOLE_UNLOCKED(); | |
619 | ||
620 | if (!CON_IS_VISIBLE(vc) || | |
621 | !vc->vc_sw->con_set_origin || | |
622 | !vc->vc_sw->con_set_origin(vc)) | |
623 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
624 | vc->vc_visible_origin = vc->vc_origin; | |
625 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
626 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
627 | } | |
628 | ||
629 | static inline void save_screen(struct vc_data *vc) | |
630 | { | |
631 | WARN_CONSOLE_UNLOCKED(); | |
632 | ||
633 | if (vc->vc_sw->con_save_screen) | |
634 | vc->vc_sw->con_save_screen(vc); | |
635 | } | |
636 | ||
637 | /* | |
638 | * Redrawing of screen | |
639 | */ | |
640 | ||
641 | static void clear_buffer_attributes(struct vc_data *vc) | |
642 | { | |
643 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
644 | int count = vc->vc_screenbuf_size / 2; | |
645 | int mask = vc->vc_hi_font_mask | 0xff; | |
646 | ||
647 | for (; count > 0; count--, p++) { | |
648 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
649 | } | |
650 | } | |
651 | ||
652 | void redraw_screen(struct vc_data *vc, int is_switch) | |
653 | { | |
654 | int redraw = 0; | |
655 | ||
656 | WARN_CONSOLE_UNLOCKED(); | |
657 | ||
658 | if (!vc) { | |
659 | /* strange ... */ | |
660 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
661 | return; | |
662 | } | |
663 | ||
664 | if (is_switch) { | |
665 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
666 | if (old_vc == vc) | |
667 | return; | |
668 | if (!CON_IS_VISIBLE(vc)) | |
669 | redraw = 1; | |
670 | *vc->vc_display_fg = vc; | |
671 | fg_console = vc->vc_num; | |
672 | hide_cursor(old_vc); | |
673 | if (!CON_IS_VISIBLE(old_vc)) { | |
674 | save_screen(old_vc); | |
675 | set_origin(old_vc); | |
676 | } | |
677 | } else { | |
678 | hide_cursor(vc); | |
679 | redraw = 1; | |
680 | } | |
681 | ||
682 | if (redraw) { | |
683 | int update; | |
684 | int old_was_color = vc->vc_can_do_color; | |
685 | ||
686 | set_origin(vc); | |
687 | update = vc->vc_sw->con_switch(vc); | |
688 | set_palette(vc); | |
689 | /* | |
690 | * If console changed from mono<->color, the best we can do | |
691 | * is to clear the buffer attributes. As it currently stands, | |
692 | * rebuilding new attributes from the old buffer is not doable | |
693 | * without overly complex code. | |
694 | */ | |
695 | if (old_was_color != vc->vc_can_do_color) { | |
696 | update_attr(vc); | |
697 | clear_buffer_attributes(vc); | |
698 | } | |
699 | if (update && vc->vc_mode != KD_GRAPHICS) | |
700 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
701 | } | |
702 | set_cursor(vc); | |
703 | if (is_switch) { | |
704 | set_leds(); | |
705 | compute_shiftstate(); | |
8182ec49 | 706 | notify_update(vc); |
1da177e4 LT |
707 | } |
708 | } | |
709 | ||
710 | /* | |
711 | * Allocation, freeing and resizing of VTs. | |
712 | */ | |
713 | ||
714 | int vc_cons_allocated(unsigned int i) | |
715 | { | |
716 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
717 | } | |
718 | ||
719 | static void visual_init(struct vc_data *vc, int num, int init) | |
720 | { | |
721 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
722 | if (vc->vc_sw) | |
723 | module_put(vc->vc_sw->owner); | |
724 | vc->vc_sw = conswitchp; | |
725 | #ifndef VT_SINGLE_DRIVER | |
726 | if (con_driver_map[num]) | |
727 | vc->vc_sw = con_driver_map[num]; | |
728 | #endif | |
729 | __module_get(vc->vc_sw->owner); | |
730 | vc->vc_num = num; | |
731 | vc->vc_display_fg = &master_display_fg; | |
732 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; | |
733 | vc->vc_uni_pagedir = 0; | |
734 | vc->vc_hi_font_mask = 0; | |
735 | vc->vc_complement_mask = 0; | |
736 | vc->vc_can_do_color = 0; | |
737 | vc->vc_sw->con_init(vc, init); | |
738 | if (!vc->vc_complement_mask) | |
739 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
740 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
741 | vc->vc_size_row = vc->vc_cols << 1; | |
742 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
743 | } | |
744 | ||
745 | int vc_allocate(unsigned int currcons) /* return 0 on success */ | |
746 | { | |
747 | WARN_CONSOLE_UNLOCKED(); | |
748 | ||
749 | if (currcons >= MAX_NR_CONSOLES) | |
750 | return -ENXIO; | |
751 | if (!vc_cons[currcons].d) { | |
752 | struct vc_data *vc; | |
b293d758 | 753 | struct vt_notifier_param param; |
1da177e4 LT |
754 | |
755 | /* prevent users from taking too much memory */ | |
756 | if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) | |
757 | return -EPERM; | |
758 | ||
759 | /* due to the granularity of kmalloc, we waste some memory here */ | |
760 | /* the alloc is done in two steps, to optimize the common situation | |
761 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
762 | /* although the numbers above are not valid since long ago, the | |
763 | point is still up-to-date and the comment still has its value | |
764 | even if only as a historical artifact. --mj, July 1998 */ | |
b293d758 | 765 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); |
1da177e4 LT |
766 | if (!vc) |
767 | return -ENOMEM; | |
1da177e4 | 768 | vc_cons[currcons].d = vc; |
c2c88f10 | 769 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
1da177e4 LT |
770 | visual_init(vc, currcons, 1); |
771 | if (!*vc->vc_uni_pagedir_loc) | |
772 | con_set_default_unimap(vc); | |
254e948b CM |
773 | if (!vc->vc_kmalloced) |
774 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); | |
1da177e4 LT |
775 | if (!vc->vc_screenbuf) { |
776 | kfree(vc); | |
777 | vc_cons[currcons].d = NULL; | |
778 | return -ENOMEM; | |
779 | } | |
780 | vc->vc_kmalloced = 1; | |
781 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); | |
b293d758 | 782 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); |
1da177e4 LT |
783 | } |
784 | return 0; | |
785 | } | |
786 | ||
e400b6ec AD |
787 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
788 | int user) | |
1da177e4 LT |
789 | { |
790 | /* Resizes the resolution of the display adapater */ | |
791 | int err = 0; | |
792 | ||
793 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
794 | err = vc->vc_sw->con_resize(vc, width, height, user); |
795 | ||
1da177e4 LT |
796 | return err; |
797 | } | |
798 | ||
799 | /* | |
800 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
801 | * [this is to be used together with some user program | |
802 | * like resize that changes the hardware videomode] | |
803 | */ | |
804 | #define VC_RESIZE_MAXCOL (32767) | |
805 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
806 | |
807 | /** | |
808 | * vc_do_resize - resizing method for the tty | |
809 | * @tty: tty being resized | |
810 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
811 | * @vc: virtual console private data | |
812 | * @cols: columns | |
813 | * @lines: lines | |
814 | * | |
815 | * Resize a virtual console, clipping according to the actual constraints. | |
816 | * If the caller passes a tty structure then update the termios winsize | |
817 | * information and perform any neccessary signal handling. | |
818 | * | |
819 | * Caller must hold the console semaphore. Takes the termios mutex and | |
820 | * ctrl_lock of the tty IFF a tty is passed. | |
821 | */ | |
822 | ||
823 | static int vc_do_resize(struct tty_struct *tty, struct tty_struct *real_tty, | |
824 | struct vc_data *vc, unsigned int cols, unsigned int lines) | |
1da177e4 LT |
825 | { |
826 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
827 | unsigned int old_cols, old_rows, old_row_size, old_screen_size; | |
828 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; | |
e400b6ec | 829 | unsigned int end, user; |
1da177e4 LT |
830 | unsigned short *newscreen; |
831 | ||
832 | WARN_CONSOLE_UNLOCKED(); | |
833 | ||
834 | if (!vc) | |
835 | return -ENXIO; | |
836 | ||
e400b6ec AD |
837 | user = vc->vc_resize_user; |
838 | vc->vc_resize_user = 0; | |
839 | ||
1da177e4 LT |
840 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
841 | return -EINVAL; | |
842 | ||
843 | new_cols = (cols ? cols : vc->vc_cols); | |
844 | new_rows = (lines ? lines : vc->vc_rows); | |
845 | new_row_size = new_cols << 1; | |
846 | new_screen_size = new_row_size * new_rows; | |
847 | ||
848 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
849 | return 0; | |
850 | ||
5cbded58 | 851 | newscreen = kmalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
852 | if (!newscreen) |
853 | return -ENOMEM; | |
854 | ||
855 | old_rows = vc->vc_rows; | |
856 | old_cols = vc->vc_cols; | |
857 | old_row_size = vc->vc_size_row; | |
858 | old_screen_size = vc->vc_screenbuf_size; | |
859 | ||
e400b6ec | 860 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
861 | if (err) { |
862 | kfree(newscreen); | |
863 | return err; | |
864 | } | |
865 | ||
866 | vc->vc_rows = new_rows; | |
867 | vc->vc_cols = new_cols; | |
868 | vc->vc_size_row = new_row_size; | |
869 | vc->vc_screenbuf_size = new_screen_size; | |
870 | ||
871 | rlth = min(old_row_size, new_row_size); | |
872 | rrem = new_row_size - rlth; | |
873 | old_origin = vc->vc_origin; | |
874 | new_origin = (long) newscreen; | |
875 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
876 | |
877 | if (vc->vc_y > new_rows) { | |
878 | if (old_rows - vc->vc_y < new_rows) { | |
879 | /* | |
880 | * Cursor near the bottom, copy contents from the | |
881 | * bottom of buffer | |
882 | */ | |
883 | old_origin += (old_rows - new_rows) * old_row_size; | |
884 | end = vc->vc_scr_end; | |
885 | } else { | |
886 | /* | |
887 | * Cursor is in no man's land, copy 1/2 screenful | |
888 | * from the top and bottom of cursor position | |
889 | */ | |
890 | old_origin += (vc->vc_y - new_rows/2) * old_row_size; | |
065d9cac | 891 | end = old_origin + (old_row_size * new_rows); |
3b41dc1a AD |
892 | } |
893 | } else | |
894 | /* | |
895 | * Cursor near the top, copy contents from the top of buffer | |
896 | */ | |
065d9cac AD |
897 | end = (old_rows > new_rows) ? old_origin + |
898 | (old_row_size * new_rows) : | |
3b41dc1a | 899 | vc->vc_scr_end; |
1da177e4 LT |
900 | |
901 | update_attr(vc); | |
902 | ||
3b41dc1a AD |
903 | while (old_origin < end) { |
904 | scr_memcpyw((unsigned short *) new_origin, | |
905 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 906 | if (rrem) |
3b41dc1a AD |
907 | scr_memsetw((void *)(new_origin + rlth), |
908 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
909 | old_origin += old_row_size; |
910 | new_origin += new_row_size; | |
911 | } | |
912 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
913 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
914 | new_scr_end - new_origin); | |
1da177e4 LT |
915 | if (vc->vc_kmalloced) |
916 | kfree(vc->vc_screenbuf); | |
917 | vc->vc_screenbuf = newscreen; | |
918 | vc->vc_kmalloced = 1; | |
919 | vc->vc_screenbuf_size = new_screen_size; | |
920 | set_origin(vc); | |
921 | ||
922 | /* do part of a reset_terminal() */ | |
923 | vc->vc_top = 0; | |
924 | vc->vc_bottom = vc->vc_rows; | |
925 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
926 | save_cur(vc); | |
927 | ||
8c9a9dd0 AC |
928 | if (tty) { |
929 | /* Rewrite the requested winsize data with the actual | |
930 | resulting sizes */ | |
931 | struct winsize ws; | |
1da177e4 LT |
932 | memset(&ws, 0, sizeof(ws)); |
933 | ws.ws_row = vc->vc_rows; | |
934 | ws.ws_col = vc->vc_cols; | |
935 | ws.ws_ypixel = vc->vc_scan_lines; | |
8c9a9dd0 | 936 | tty_do_resize(tty, real_tty, &ws); |
1da177e4 LT |
937 | } |
938 | ||
939 | if (CON_IS_VISIBLE(vc)) | |
940 | update_screen(vc); | |
941 | return err; | |
942 | } | |
943 | ||
8c9a9dd0 AC |
944 | /** |
945 | * vc_resize - resize a VT | |
946 | * @vc: virtual console | |
947 | * @cols: columns | |
948 | * @rows: rows | |
949 | * | |
950 | * Resize a virtual console as seen from the console end of things. We | |
951 | * use the common vc_do_resize methods to update the structures. The | |
952 | * caller must hold the console sem to protect console internals and | |
953 | * vc->vc_tty | |
954 | */ | |
955 | ||
956 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
957 | { | |
958 | return vc_do_resize(vc->vc_tty, vc->vc_tty, vc, cols, rows); | |
959 | } | |
960 | ||
961 | /** | |
962 | * vt_resize - resize a VT | |
963 | * @tty: tty to resize | |
964 | * @real_tty: tty if a pty/tty pair | |
965 | * @ws: winsize attributes | |
966 | * | |
967 | * Resize a virtual terminal. This is called by the tty layer as we | |
968 | * register our own handler for resizing. The mutual helper does all | |
969 | * the actual work. | |
970 | * | |
971 | * Takes the console sem and the called methods then take the tty | |
972 | * termios_mutex and the tty ctrl_lock in that order. | |
973 | */ | |
974 | ||
975 | int vt_resize(struct tty_struct *tty, struct tty_struct *real_tty, | |
976 | struct winsize *ws) | |
ca9bda00 | 977 | { |
8c9a9dd0 AC |
978 | struct vc_data *vc = tty->driver_data; |
979 | int ret; | |
ca9bda00 AC |
980 | |
981 | acquire_console_sem(); | |
8c9a9dd0 | 982 | ret = vc_do_resize(tty, real_tty, vc, ws->ws_col, ws->ws_row); |
ca9bda00 | 983 | release_console_sem(); |
8c9a9dd0 | 984 | return ret; |
ca9bda00 | 985 | } |
1da177e4 | 986 | |
ca9bda00 | 987 | void vc_deallocate(unsigned int currcons) |
1da177e4 LT |
988 | { |
989 | WARN_CONSOLE_UNLOCKED(); | |
990 | ||
991 | if (vc_cons_allocated(currcons)) { | |
992 | struct vc_data *vc = vc_cons[currcons].d; | |
b293d758 ST |
993 | struct vt_notifier_param param = { .vc = vc }; |
994 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); | |
1da177e4 | 995 | vc->vc_sw->con_deinit(vc); |
bde0d2c9 | 996 | put_pid(vc->vt_pid); |
d459ec0b | 997 | module_put(vc->vc_sw->owner); |
1da177e4 LT |
998 | if (vc->vc_kmalloced) |
999 | kfree(vc->vc_screenbuf); | |
1000 | if (currcons >= MIN_NR_CONSOLES) | |
1001 | kfree(vc); | |
1002 | vc_cons[currcons].d = NULL; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * VT102 emulator | |
1008 | */ | |
1009 | ||
1010 | #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1011 | #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1012 | #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) | |
1013 | ||
1014 | #define decarm VC_REPEAT | |
1015 | #define decckm VC_CKMODE | |
1016 | #define kbdapplic VC_APPLIC | |
1017 | #define lnm VC_CRLF | |
1018 | ||
1019 | /* | |
1020 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1021 | */ | |
1022 | #define VT100ID "\033[?1;2c" | |
1023 | #define VT102ID "\033[?6c" | |
1024 | ||
1025 | unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, | |
1026 | 8,12,10,14, 9,13,11,15 }; | |
1027 | ||
1028 | /* the default colour table, for VGA+ colour systems */ | |
1029 | int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, | |
1030 | 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; | |
1031 | int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, | |
1032 | 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; | |
1033 | int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, | |
1034 | 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; | |
1035 | ||
1c2bbe6a JE |
1036 | module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); |
1037 | module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); | |
1038 | module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); | |
1039 | ||
1da177e4 LT |
1040 | /* |
1041 | * gotoxy() must verify all boundaries, because the arguments | |
1042 | * might also be negative. If the given position is out of | |
1043 | * bounds, the cursor is placed at the nearest margin. | |
1044 | */ | |
1045 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) | |
1046 | { | |
1047 | int min_y, max_y; | |
1048 | ||
1049 | if (new_x < 0) | |
1050 | vc->vc_x = 0; | |
1051 | else { | |
1052 | if (new_x >= vc->vc_cols) | |
1053 | vc->vc_x = vc->vc_cols - 1; | |
1054 | else | |
1055 | vc->vc_x = new_x; | |
1056 | } | |
1057 | ||
1058 | if (vc->vc_decom) { | |
1059 | min_y = vc->vc_top; | |
1060 | max_y = vc->vc_bottom; | |
1061 | } else { | |
1062 | min_y = 0; | |
1063 | max_y = vc->vc_rows; | |
1064 | } | |
1065 | if (new_y < min_y) | |
1066 | vc->vc_y = min_y; | |
1067 | else if (new_y >= max_y) | |
1068 | vc->vc_y = max_y - 1; | |
1069 | else | |
1070 | vc->vc_y = new_y; | |
1071 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); | |
1072 | vc->vc_need_wrap = 0; | |
1073 | } | |
1074 | ||
1075 | /* for absolute user moves, when decom is set */ | |
1076 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) | |
1077 | { | |
1078 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); | |
1079 | } | |
1080 | ||
1081 | void scrollback(struct vc_data *vc, int lines) | |
1082 | { | |
1083 | if (!lines) | |
1084 | lines = vc->vc_rows / 2; | |
1085 | scrolldelta(-lines); | |
1086 | } | |
1087 | ||
1088 | void scrollfront(struct vc_data *vc, int lines) | |
1089 | { | |
1090 | if (!lines) | |
1091 | lines = vc->vc_rows / 2; | |
1092 | scrolldelta(lines); | |
1093 | } | |
1094 | ||
1095 | static void lf(struct vc_data *vc) | |
1096 | { | |
1097 | /* don't scroll if above bottom of scrolling region, or | |
1098 | * if below scrolling region | |
1099 | */ | |
1100 | if (vc->vc_y + 1 == vc->vc_bottom) | |
1101 | scrup(vc, vc->vc_top, vc->vc_bottom, 1); | |
1102 | else if (vc->vc_y < vc->vc_rows - 1) { | |
1103 | vc->vc_y++; | |
1104 | vc->vc_pos += vc->vc_size_row; | |
1105 | } | |
1106 | vc->vc_need_wrap = 0; | |
b293d758 | 1107 | notify_write(vc, '\n'); |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | static void ri(struct vc_data *vc) | |
1111 | { | |
1112 | /* don't scroll if below top of scrolling region, or | |
1113 | * if above scrolling region | |
1114 | */ | |
1115 | if (vc->vc_y == vc->vc_top) | |
1116 | scrdown(vc, vc->vc_top, vc->vc_bottom, 1); | |
1117 | else if (vc->vc_y > 0) { | |
1118 | vc->vc_y--; | |
1119 | vc->vc_pos -= vc->vc_size_row; | |
1120 | } | |
1121 | vc->vc_need_wrap = 0; | |
1122 | } | |
1123 | ||
1124 | static inline void cr(struct vc_data *vc) | |
1125 | { | |
1126 | vc->vc_pos -= vc->vc_x << 1; | |
1127 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1128 | notify_write(vc, '\r'); |
1da177e4 LT |
1129 | } |
1130 | ||
1131 | static inline void bs(struct vc_data *vc) | |
1132 | { | |
1133 | if (vc->vc_x) { | |
1134 | vc->vc_pos -= 2; | |
1135 | vc->vc_x--; | |
1136 | vc->vc_need_wrap = 0; | |
b293d758 | 1137 | notify_write(vc, '\b'); |
1da177e4 LT |
1138 | } |
1139 | } | |
1140 | ||
1141 | static inline void del(struct vc_data *vc) | |
1142 | { | |
1143 | /* ignored */ | |
1144 | } | |
1145 | ||
1146 | static void csi_J(struct vc_data *vc, int vpar) | |
1147 | { | |
1148 | unsigned int count; | |
1149 | unsigned short * start; | |
1150 | ||
1151 | switch (vpar) { | |
1152 | case 0: /* erase from cursor to end of display */ | |
1153 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; | |
1154 | start = (unsigned short *)vc->vc_pos; | |
1155 | if (DO_UPDATE(vc)) { | |
1156 | /* do in two stages */ | |
1157 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1158 | vc->vc_cols - vc->vc_x); | |
1159 | vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, | |
1160 | vc->vc_rows - vc->vc_y - 1, | |
1161 | vc->vc_cols); | |
1162 | } | |
1163 | break; | |
1164 | case 1: /* erase from start to cursor */ | |
1165 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; | |
1166 | start = (unsigned short *)vc->vc_origin; | |
1167 | if (DO_UPDATE(vc)) { | |
1168 | /* do in two stages */ | |
1169 | vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, | |
1170 | vc->vc_cols); | |
1171 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1172 | vc->vc_x + 1); | |
1173 | } | |
1174 | break; | |
1175 | case 2: /* erase whole display */ | |
1176 | count = vc->vc_cols * vc->vc_rows; | |
1177 | start = (unsigned short *)vc->vc_origin; | |
1178 | if (DO_UPDATE(vc)) | |
1179 | vc->vc_sw->con_clear(vc, 0, 0, | |
1180 | vc->vc_rows, | |
1181 | vc->vc_cols); | |
1182 | break; | |
1183 | default: | |
1184 | return; | |
1185 | } | |
1186 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1187 | vc->vc_need_wrap = 0; | |
1188 | } | |
1189 | ||
1190 | static void csi_K(struct vc_data *vc, int vpar) | |
1191 | { | |
1192 | unsigned int count; | |
1193 | unsigned short * start; | |
1194 | ||
1195 | switch (vpar) { | |
1196 | case 0: /* erase from cursor to end of line */ | |
1197 | count = vc->vc_cols - vc->vc_x; | |
1198 | start = (unsigned short *)vc->vc_pos; | |
1199 | if (DO_UPDATE(vc)) | |
1200 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, | |
1201 | vc->vc_cols - vc->vc_x); | |
1202 | break; | |
1203 | case 1: /* erase from start of line to cursor */ | |
1204 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1205 | count = vc->vc_x + 1; | |
1206 | if (DO_UPDATE(vc)) | |
1207 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1208 | vc->vc_x + 1); | |
1209 | break; | |
1210 | case 2: /* erase whole line */ | |
1211 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); | |
1212 | count = vc->vc_cols; | |
1213 | if (DO_UPDATE(vc)) | |
1214 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, | |
1215 | vc->vc_cols); | |
1216 | break; | |
1217 | default: | |
1218 | return; | |
1219 | } | |
1220 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
1221 | vc->vc_need_wrap = 0; | |
1222 | } | |
1223 | ||
1224 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1225 | { /* not vt100? */ | |
1226 | int count; | |
1227 | ||
1228 | if (!vpar) | |
1229 | vpar++; | |
1230 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1231 | ||
1232 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); | |
1233 | if (DO_UPDATE(vc)) | |
1234 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); | |
1235 | vc->vc_need_wrap = 0; | |
1236 | } | |
1237 | ||
1238 | static void default_attr(struct vc_data *vc) | |
1239 | { | |
1240 | vc->vc_intensity = 1; | |
fa6ce9ab | 1241 | vc->vc_italic = 0; |
1da177e4 LT |
1242 | vc->vc_underline = 0; |
1243 | vc->vc_reverse = 0; | |
1244 | vc->vc_blink = 0; | |
1245 | vc->vc_color = vc->vc_def_color; | |
1246 | } | |
1247 | ||
1248 | /* console_sem is held */ | |
1249 | static void csi_m(struct vc_data *vc) | |
1250 | { | |
1251 | int i; | |
1252 | ||
1253 | for (i = 0; i <= vc->vc_npar; i++) | |
1254 | switch (vc->vc_par[i]) { | |
1255 | case 0: /* all attributes off */ | |
1256 | default_attr(vc); | |
1257 | break; | |
1258 | case 1: | |
1259 | vc->vc_intensity = 2; | |
1260 | break; | |
1261 | case 2: | |
1262 | vc->vc_intensity = 0; | |
1263 | break; | |
fa6ce9ab JE |
1264 | case 3: |
1265 | vc->vc_italic = 1; | |
1266 | break; | |
1da177e4 LT |
1267 | case 4: |
1268 | vc->vc_underline = 1; | |
1269 | break; | |
1270 | case 5: | |
1271 | vc->vc_blink = 1; | |
1272 | break; | |
1273 | case 7: | |
1274 | vc->vc_reverse = 1; | |
1275 | break; | |
1276 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1277 | * Select primary font, don't display | |
1278 | * control chars if defined, don't set | |
1279 | * bit 8 on output. | |
1280 | */ | |
1281 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1282 | ? vc->vc_G0_charset | |
1283 | : vc->vc_G1_charset, vc); | |
1284 | vc->vc_disp_ctrl = 0; | |
1285 | vc->vc_toggle_meta = 0; | |
1286 | break; | |
1287 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1288 | * Select first alternate font, lets | |
1289 | * chars < 32 be displayed as ROM chars. | |
1290 | */ | |
1291 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1292 | vc->vc_disp_ctrl = 1; | |
1293 | vc->vc_toggle_meta = 0; | |
1294 | break; | |
1295 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1296 | * Select second alternate font, toggle | |
1297 | * high bit before displaying as ROM char. | |
1298 | */ | |
1299 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1300 | vc->vc_disp_ctrl = 1; | |
1301 | vc->vc_toggle_meta = 1; | |
1302 | break; | |
1303 | case 21: | |
1304 | case 22: | |
1305 | vc->vc_intensity = 1; | |
1306 | break; | |
fa6ce9ab JE |
1307 | case 23: |
1308 | vc->vc_italic = 0; | |
1309 | break; | |
1da177e4 LT |
1310 | case 24: |
1311 | vc->vc_underline = 0; | |
1312 | break; | |
1313 | case 25: | |
1314 | vc->vc_blink = 0; | |
1315 | break; | |
1316 | case 27: | |
1317 | vc->vc_reverse = 0; | |
1318 | break; | |
1319 | case 38: /* ANSI X3.64-1979 (SCO-ish?) | |
1320 | * Enables underscore, white foreground | |
1321 | * with white underscore (Linux - use | |
1322 | * default foreground). | |
1323 | */ | |
1324 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1325 | vc->vc_underline = 1; | |
1326 | break; | |
1327 | case 39: /* ANSI X3.64-1979 (SCO-ish?) | |
1328 | * Disable underline option. | |
1329 | * Reset colour to default? It did this | |
1330 | * before... | |
1331 | */ | |
1332 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); | |
1333 | vc->vc_underline = 0; | |
1334 | break; | |
1335 | case 49: | |
1336 | vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); | |
1337 | break; | |
1338 | default: | |
1339 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) | |
1340 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1341 | | (vc->vc_color & 0xf0); | |
1342 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1343 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1344 | | (vc->vc_color & 0x0f); | |
1345 | break; | |
1346 | } | |
1347 | update_attr(vc); | |
1348 | } | |
1349 | ||
1350 | static void respond_string(const char *p, struct tty_struct *tty) | |
1351 | { | |
1352 | while (*p) { | |
1353 | tty_insert_flip_char(tty, *p, 0); | |
1354 | p++; | |
1355 | } | |
1356 | con_schedule_flip(tty); | |
1357 | } | |
1358 | ||
1359 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1360 | { | |
1361 | char buf[40]; | |
1362 | ||
1363 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
1364 | respond_string(buf, tty); | |
1365 | } | |
1366 | ||
1367 | static inline void status_report(struct tty_struct *tty) | |
1368 | { | |
1369 | respond_string("\033[0n", tty); /* Terminal ok */ | |
1370 | } | |
1371 | ||
1372 | static inline void respond_ID(struct tty_struct * tty) | |
1373 | { | |
1374 | respond_string(VT102ID, tty); | |
1375 | } | |
1376 | ||
1377 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1378 | { | |
1379 | char buf[8]; | |
1380 | ||
1381 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1382 | (char)('!' + mry)); | |
1383 | respond_string(buf, tty); | |
1384 | } | |
1385 | ||
1386 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ | |
1387 | int mouse_reporting(void) | |
1388 | { | |
1389 | return vc_cons[fg_console].d->vc_report_mouse; | |
1390 | } | |
1391 | ||
1392 | /* console_sem is held */ | |
1393 | static void set_mode(struct vc_data *vc, int on_off) | |
1394 | { | |
1395 | int i; | |
1396 | ||
1397 | for (i = 0; i <= vc->vc_npar; i++) | |
1398 | if (vc->vc_ques) { | |
1399 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ | |
1400 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1401 | if (on_off) | |
1402 | set_kbd(vc, decckm); | |
1403 | else | |
1404 | clr_kbd(vc, decckm); | |
1405 | break; | |
1406 | case 3: /* 80/132 mode switch unimplemented */ | |
1407 | vc->vc_deccolm = on_off; | |
1408 | #if 0 | |
1409 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1410 | /* this alone does not suffice; some user mode | |
1411 | utility has to change the hardware regs */ | |
1412 | #endif | |
1413 | break; | |
1414 | case 5: /* Inverted screen on/off */ | |
1415 | if (vc->vc_decscnm != on_off) { | |
1416 | vc->vc_decscnm = on_off; | |
1417 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1418 | update_attr(vc); | |
1419 | } | |
1420 | break; | |
1421 | case 6: /* Origin relative/absolute */ | |
1422 | vc->vc_decom = on_off; | |
1423 | gotoxay(vc, 0, 0); | |
1424 | break; | |
1425 | case 7: /* Autowrap on/off */ | |
1426 | vc->vc_decawm = on_off; | |
1427 | break; | |
1428 | case 8: /* Autorepeat on/off */ | |
1429 | if (on_off) | |
1430 | set_kbd(vc, decarm); | |
1431 | else | |
1432 | clr_kbd(vc, decarm); | |
1433 | break; | |
1434 | case 9: | |
1435 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1436 | break; | |
1437 | case 25: /* Cursor on/off */ | |
1438 | vc->vc_deccm = on_off; | |
1439 | break; | |
1440 | case 1000: | |
1441 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1442 | break; | |
1443 | } | |
1444 | } else { | |
1445 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1446 | case 3: /* Monitor (display ctrls) */ | |
1447 | vc->vc_disp_ctrl = on_off; | |
1448 | break; | |
1449 | case 4: /* Insert Mode on/off */ | |
1450 | vc->vc_decim = on_off; | |
1451 | break; | |
1452 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1453 | if (on_off) | |
1454 | set_kbd(vc, lnm); | |
1455 | else | |
1456 | clr_kbd(vc, lnm); | |
1457 | break; | |
1458 | } | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | /* console_sem is held */ | |
1463 | static void setterm_command(struct vc_data *vc) | |
1464 | { | |
1465 | switch(vc->vc_par[0]) { | |
1466 | case 1: /* set color for underline mode */ | |
1467 | if (vc->vc_can_do_color && | |
1468 | vc->vc_par[1] < 16) { | |
1469 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1470 | if (vc->vc_underline) | |
1471 | update_attr(vc); | |
1472 | } | |
1473 | break; | |
1474 | case 2: /* set color for half intensity mode */ | |
1475 | if (vc->vc_can_do_color && | |
1476 | vc->vc_par[1] < 16) { | |
1477 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1478 | if (vc->vc_intensity == 0) | |
1479 | update_attr(vc); | |
1480 | } | |
1481 | break; | |
1482 | case 8: /* store colors as defaults */ | |
1483 | vc->vc_def_color = vc->vc_attr; | |
1484 | if (vc->vc_hi_font_mask == 0x100) | |
1485 | vc->vc_def_color >>= 1; | |
1486 | default_attr(vc); | |
1487 | update_attr(vc); | |
1488 | break; | |
1489 | case 9: /* set blanking interval */ | |
1490 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1491 | poke_blanked_console(); | |
1492 | break; | |
1493 | case 10: /* set bell frequency in Hz */ | |
1494 | if (vc->vc_npar >= 1) | |
1495 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1496 | else | |
1497 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1498 | break; | |
1499 | case 11: /* set bell duration in msec */ | |
1500 | if (vc->vc_npar >= 1) | |
1501 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
1502 | vc->vc_par[1] * HZ / 1000 : 0; | |
1503 | else | |
1504 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1505 | break; | |
1506 | case 12: /* bring specified console to the front */ | |
1507 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1508 | set_console(vc->vc_par[1] - 1); | |
1509 | break; | |
1510 | case 13: /* unblank the screen */ | |
1511 | poke_blanked_console(); | |
1512 | break; | |
1513 | case 14: /* set vesa powerdown interval */ | |
1514 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; | |
1515 | break; | |
1516 | case 15: /* activate the previous console */ | |
1517 | set_console(last_console); | |
1518 | break; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | /* console_sem is held */ | |
1523 | static void csi_at(struct vc_data *vc, unsigned int nr) | |
1524 | { | |
1525 | if (nr > vc->vc_cols - vc->vc_x) | |
1526 | nr = vc->vc_cols - vc->vc_x; | |
1527 | else if (!nr) | |
1528 | nr = 1; | |
1529 | insert_char(vc, nr); | |
1530 | } | |
1531 | ||
1532 | /* console_sem is held */ | |
1533 | static void csi_L(struct vc_data *vc, unsigned int nr) | |
1534 | { | |
1535 | if (nr > vc->vc_rows - vc->vc_y) | |
1536 | nr = vc->vc_rows - vc->vc_y; | |
1537 | else if (!nr) | |
1538 | nr = 1; | |
1539 | scrdown(vc, vc->vc_y, vc->vc_bottom, nr); | |
1540 | vc->vc_need_wrap = 0; | |
1541 | } | |
1542 | ||
1543 | /* console_sem is held */ | |
1544 | static void csi_P(struct vc_data *vc, unsigned int nr) | |
1545 | { | |
1546 | if (nr > vc->vc_cols - vc->vc_x) | |
1547 | nr = vc->vc_cols - vc->vc_x; | |
1548 | else if (!nr) | |
1549 | nr = 1; | |
1550 | delete_char(vc, nr); | |
1551 | } | |
1552 | ||
1553 | /* console_sem is held */ | |
1554 | static void csi_M(struct vc_data *vc, unsigned int nr) | |
1555 | { | |
1556 | if (nr > vc->vc_rows - vc->vc_y) | |
1557 | nr = vc->vc_rows - vc->vc_y; | |
1558 | else if (!nr) | |
1559 | nr=1; | |
1560 | scrup(vc, vc->vc_y, vc->vc_bottom, nr); | |
1561 | vc->vc_need_wrap = 0; | |
1562 | } | |
1563 | ||
1564 | /* console_sem is held (except via vc_init->reset_terminal */ | |
1565 | static void save_cur(struct vc_data *vc) | |
1566 | { | |
1567 | vc->vc_saved_x = vc->vc_x; | |
1568 | vc->vc_saved_y = vc->vc_y; | |
1569 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 1570 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
1571 | vc->vc_s_underline = vc->vc_underline; |
1572 | vc->vc_s_blink = vc->vc_blink; | |
1573 | vc->vc_s_reverse = vc->vc_reverse; | |
1574 | vc->vc_s_charset = vc->vc_charset; | |
1575 | vc->vc_s_color = vc->vc_color; | |
1576 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
1577 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
1578 | } | |
1579 | ||
1580 | /* console_sem is held */ | |
1581 | static void restore_cur(struct vc_data *vc) | |
1582 | { | |
1583 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
1584 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 1585 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
1586 | vc->vc_underline = vc->vc_s_underline; |
1587 | vc->vc_blink = vc->vc_s_blink; | |
1588 | vc->vc_reverse = vc->vc_s_reverse; | |
1589 | vc->vc_charset = vc->vc_s_charset; | |
1590 | vc->vc_color = vc->vc_s_color; | |
1591 | vc->vc_G0_charset = vc->vc_saved_G0; | |
1592 | vc->vc_G1_charset = vc->vc_saved_G1; | |
1593 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
1594 | update_attr(vc); | |
1595 | vc->vc_need_wrap = 0; | |
1596 | } | |
1597 | ||
1598 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, | |
1599 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, | |
1600 | ESpalette }; | |
1601 | ||
1602 | /* console_sem is held (except via vc_init()) */ | |
1603 | static void reset_terminal(struct vc_data *vc, int do_clear) | |
1604 | { | |
1605 | vc->vc_top = 0; | |
1606 | vc->vc_bottom = vc->vc_rows; | |
1607 | vc->vc_state = ESnormal; | |
1608 | vc->vc_ques = 0; | |
1609 | vc->vc_translate = set_translate(LAT1_MAP, vc); | |
1610 | vc->vc_G0_charset = LAT1_MAP; | |
1611 | vc->vc_G1_charset = GRAF_MAP; | |
1612 | vc->vc_charset = 0; | |
1613 | vc->vc_need_wrap = 0; | |
1614 | vc->vc_report_mouse = 0; | |
042f10ec | 1615 | vc->vc_utf = default_utf8; |
1da177e4 LT |
1616 | vc->vc_utf_count = 0; |
1617 | ||
1618 | vc->vc_disp_ctrl = 0; | |
1619 | vc->vc_toggle_meta = 0; | |
1620 | ||
1621 | vc->vc_decscnm = 0; | |
1622 | vc->vc_decom = 0; | |
1623 | vc->vc_decawm = 1; | |
1624 | vc->vc_deccm = 1; | |
1625 | vc->vc_decim = 0; | |
1626 | ||
1627 | set_kbd(vc, decarm); | |
1628 | clr_kbd(vc, decckm); | |
1629 | clr_kbd(vc, kbdapplic); | |
1630 | clr_kbd(vc, lnm); | |
1631 | kbd_table[vc->vc_num].lockstate = 0; | |
1632 | kbd_table[vc->vc_num].slockstate = 0; | |
1633 | kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; | |
1634 | kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; | |
1635 | /* do not do set_leds here because this causes an endless tasklet loop | |
1636 | when the keyboard hasn't been initialized yet */ | |
1637 | ||
1638 | vc->vc_cursor_type = CUR_DEFAULT; | |
1639 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1640 | ||
1641 | default_attr(vc); | |
1642 | update_attr(vc); | |
1643 | ||
1644 | vc->vc_tab_stop[0] = 0x01010100; | |
1645 | vc->vc_tab_stop[1] = | |
1646 | vc->vc_tab_stop[2] = | |
1647 | vc->vc_tab_stop[3] = | |
1648 | vc->vc_tab_stop[4] = 0x01010101; | |
1649 | ||
1650 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1651 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1652 | ||
1653 | gotoxy(vc, 0, 0); | |
1654 | save_cur(vc); | |
1655 | if (do_clear) | |
1656 | csi_J(vc, 2); | |
1657 | } | |
1658 | ||
1659 | /* console_sem is held */ | |
1660 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) | |
1661 | { | |
1662 | /* | |
1663 | * Control characters can be used in the _middle_ | |
1664 | * of an escape sequence. | |
1665 | */ | |
1666 | switch (c) { | |
1667 | case 0: | |
1668 | return; | |
1669 | case 7: | |
1670 | if (vc->vc_bell_duration) | |
1671 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); | |
1672 | return; | |
1673 | case 8: | |
1674 | bs(vc); | |
1675 | return; | |
1676 | case 9: | |
1677 | vc->vc_pos -= (vc->vc_x << 1); | |
1678 | while (vc->vc_x < vc->vc_cols - 1) { | |
1679 | vc->vc_x++; | |
1680 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) | |
1681 | break; | |
1682 | } | |
1683 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 1684 | notify_write(vc, '\t'); |
1da177e4 LT |
1685 | return; |
1686 | case 10: case 11: case 12: | |
1687 | lf(vc); | |
1688 | if (!is_kbd(vc, lnm)) | |
1689 | return; | |
1690 | case 13: | |
1691 | cr(vc); | |
1692 | return; | |
1693 | case 14: | |
1694 | vc->vc_charset = 1; | |
1695 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
1696 | vc->vc_disp_ctrl = 1; | |
1697 | return; | |
1698 | case 15: | |
1699 | vc->vc_charset = 0; | |
1700 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
1701 | vc->vc_disp_ctrl = 0; | |
1702 | return; | |
1703 | case 24: case 26: | |
1704 | vc->vc_state = ESnormal; | |
1705 | return; | |
1706 | case 27: | |
1707 | vc->vc_state = ESesc; | |
1708 | return; | |
1709 | case 127: | |
1710 | del(vc); | |
1711 | return; | |
1712 | case 128+27: | |
1713 | vc->vc_state = ESsquare; | |
1714 | return; | |
1715 | } | |
1716 | switch(vc->vc_state) { | |
1717 | case ESesc: | |
1718 | vc->vc_state = ESnormal; | |
1719 | switch (c) { | |
1720 | case '[': | |
1721 | vc->vc_state = ESsquare; | |
1722 | return; | |
1723 | case ']': | |
1724 | vc->vc_state = ESnonstd; | |
1725 | return; | |
1726 | case '%': | |
1727 | vc->vc_state = ESpercent; | |
1728 | return; | |
1729 | case 'E': | |
1730 | cr(vc); | |
1731 | lf(vc); | |
1732 | return; | |
1733 | case 'M': | |
1734 | ri(vc); | |
1735 | return; | |
1736 | case 'D': | |
1737 | lf(vc); | |
1738 | return; | |
1739 | case 'H': | |
1740 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); | |
1741 | return; | |
1742 | case 'Z': | |
1743 | respond_ID(tty); | |
1744 | return; | |
1745 | case '7': | |
1746 | save_cur(vc); | |
1747 | return; | |
1748 | case '8': | |
1749 | restore_cur(vc); | |
1750 | return; | |
1751 | case '(': | |
1752 | vc->vc_state = ESsetG0; | |
1753 | return; | |
1754 | case ')': | |
1755 | vc->vc_state = ESsetG1; | |
1756 | return; | |
1757 | case '#': | |
1758 | vc->vc_state = EShash; | |
1759 | return; | |
1760 | case 'c': | |
1761 | reset_terminal(vc, 1); | |
1762 | return; | |
1763 | case '>': /* Numeric keypad */ | |
1764 | clr_kbd(vc, kbdapplic); | |
1765 | return; | |
1766 | case '=': /* Appl. keypad */ | |
1767 | set_kbd(vc, kbdapplic); | |
1768 | return; | |
1769 | } | |
1770 | return; | |
1771 | case ESnonstd: | |
1772 | if (c=='P') { /* palette escape sequence */ | |
1773 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1774 | vc->vc_par[vc->vc_npar] = 0; | |
1775 | vc->vc_npar = 0; | |
1776 | vc->vc_state = ESpalette; | |
1777 | return; | |
1778 | } else if (c=='R') { /* reset palette */ | |
1779 | reset_palette(vc); | |
1780 | vc->vc_state = ESnormal; | |
1781 | } else | |
1782 | vc->vc_state = ESnormal; | |
1783 | return; | |
1784 | case ESpalette: | |
1785 | if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) { | |
1786 | vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0'); | |
1787 | if (vc->vc_npar == 7) { | |
1788 | int i = vc->vc_par[0] * 3, j = 1; | |
1789 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1790 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1791 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1792 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
1793 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
1794 | vc->vc_palette[i] += vc->vc_par[j]; | |
1795 | set_palette(vc); | |
1796 | vc->vc_state = ESnormal; | |
1797 | } | |
1798 | } else | |
1799 | vc->vc_state = ESnormal; | |
1800 | return; | |
1801 | case ESsquare: | |
1802 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
1803 | vc->vc_par[vc->vc_npar] = 0; | |
1804 | vc->vc_npar = 0; | |
1805 | vc->vc_state = ESgetpars; | |
1806 | if (c == '[') { /* Function key */ | |
1807 | vc->vc_state=ESfunckey; | |
1808 | return; | |
1809 | } | |
1810 | vc->vc_ques = (c == '?'); | |
1811 | if (vc->vc_ques) | |
1812 | return; | |
1813 | case ESgetpars: | |
1814 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
1815 | vc->vc_npar++; | |
1816 | return; | |
1817 | } else if (c>='0' && c<='9') { | |
1818 | vc->vc_par[vc->vc_npar] *= 10; | |
1819 | vc->vc_par[vc->vc_npar] += c - '0'; | |
1820 | return; | |
1821 | } else | |
1822 | vc->vc_state = ESgotpars; | |
1823 | case ESgotpars: | |
1824 | vc->vc_state = ESnormal; | |
1825 | switch(c) { | |
1826 | case 'h': | |
1827 | set_mode(vc, 1); | |
1828 | return; | |
1829 | case 'l': | |
1830 | set_mode(vc, 0); | |
1831 | return; | |
1832 | case 'c': | |
1833 | if (vc->vc_ques) { | |
1834 | if (vc->vc_par[0]) | |
1835 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
1836 | else | |
1837 | vc->vc_cursor_type = CUR_DEFAULT; | |
1838 | return; | |
1839 | } | |
1840 | break; | |
1841 | case 'm': | |
1842 | if (vc->vc_ques) { | |
1843 | clear_selection(); | |
1844 | if (vc->vc_par[0]) | |
1845 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
1846 | else | |
1847 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
1848 | return; | |
1849 | } | |
1850 | break; | |
1851 | case 'n': | |
1852 | if (!vc->vc_ques) { | |
1853 | if (vc->vc_par[0] == 5) | |
1854 | status_report(tty); | |
1855 | else if (vc->vc_par[0] == 6) | |
1856 | cursor_report(vc, tty); | |
1857 | } | |
1858 | return; | |
1859 | } | |
1860 | if (vc->vc_ques) { | |
1861 | vc->vc_ques = 0; | |
1862 | return; | |
1863 | } | |
1864 | switch(c) { | |
1865 | case 'G': case '`': | |
1866 | if (vc->vc_par[0]) | |
1867 | vc->vc_par[0]--; | |
1868 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
1869 | return; | |
1870 | case 'A': | |
1871 | if (!vc->vc_par[0]) | |
1872 | vc->vc_par[0]++; | |
1873 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
1874 | return; | |
1875 | case 'B': case 'e': | |
1876 | if (!vc->vc_par[0]) | |
1877 | vc->vc_par[0]++; | |
1878 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
1879 | return; | |
1880 | case 'C': case 'a': | |
1881 | if (!vc->vc_par[0]) | |
1882 | vc->vc_par[0]++; | |
1883 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
1884 | return; | |
1885 | case 'D': | |
1886 | if (!vc->vc_par[0]) | |
1887 | vc->vc_par[0]++; | |
1888 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
1889 | return; | |
1890 | case 'E': | |
1891 | if (!vc->vc_par[0]) | |
1892 | vc->vc_par[0]++; | |
1893 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
1894 | return; | |
1895 | case 'F': | |
1896 | if (!vc->vc_par[0]) | |
1897 | vc->vc_par[0]++; | |
1898 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
1899 | return; | |
1900 | case 'd': | |
1901 | if (vc->vc_par[0]) | |
1902 | vc->vc_par[0]--; | |
1903 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
1904 | return; | |
1905 | case 'H': case 'f': | |
1906 | if (vc->vc_par[0]) | |
1907 | vc->vc_par[0]--; | |
1908 | if (vc->vc_par[1]) | |
1909 | vc->vc_par[1]--; | |
1910 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
1911 | return; | |
1912 | case 'J': | |
1913 | csi_J(vc, vc->vc_par[0]); | |
1914 | return; | |
1915 | case 'K': | |
1916 | csi_K(vc, vc->vc_par[0]); | |
1917 | return; | |
1918 | case 'L': | |
1919 | csi_L(vc, vc->vc_par[0]); | |
1920 | return; | |
1921 | case 'M': | |
1922 | csi_M(vc, vc->vc_par[0]); | |
1923 | return; | |
1924 | case 'P': | |
1925 | csi_P(vc, vc->vc_par[0]); | |
1926 | return; | |
1927 | case 'c': | |
1928 | if (!vc->vc_par[0]) | |
1929 | respond_ID(tty); | |
1930 | return; | |
1931 | case 'g': | |
1932 | if (!vc->vc_par[0]) | |
1933 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); | |
1934 | else if (vc->vc_par[0] == 3) { | |
1935 | vc->vc_tab_stop[0] = | |
1936 | vc->vc_tab_stop[1] = | |
1937 | vc->vc_tab_stop[2] = | |
1938 | vc->vc_tab_stop[3] = | |
1939 | vc->vc_tab_stop[4] = 0; | |
1940 | } | |
1941 | return; | |
1942 | case 'm': | |
1943 | csi_m(vc); | |
1944 | return; | |
1945 | case 'q': /* DECLL - but only 3 leds */ | |
1946 | /* map 0,1,2,3 to 0,1,2,4 */ | |
1947 | if (vc->vc_par[0] < 4) | |
1948 | setledstate(kbd_table + vc->vc_num, | |
1949 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); | |
1950 | return; | |
1951 | case 'r': | |
1952 | if (!vc->vc_par[0]) | |
1953 | vc->vc_par[0]++; | |
1954 | if (!vc->vc_par[1]) | |
1955 | vc->vc_par[1] = vc->vc_rows; | |
1956 | /* Minimum allowed region is 2 lines */ | |
1957 | if (vc->vc_par[0] < vc->vc_par[1] && | |
1958 | vc->vc_par[1] <= vc->vc_rows) { | |
1959 | vc->vc_top = vc->vc_par[0] - 1; | |
1960 | vc->vc_bottom = vc->vc_par[1]; | |
1961 | gotoxay(vc, 0, 0); | |
1962 | } | |
1963 | return; | |
1964 | case 's': | |
1965 | save_cur(vc); | |
1966 | return; | |
1967 | case 'u': | |
1968 | restore_cur(vc); | |
1969 | return; | |
1970 | case 'X': | |
1971 | csi_X(vc, vc->vc_par[0]); | |
1972 | return; | |
1973 | case '@': | |
1974 | csi_at(vc, vc->vc_par[0]); | |
1975 | return; | |
1976 | case ']': /* setterm functions */ | |
1977 | setterm_command(vc); | |
1978 | return; | |
1979 | } | |
1980 | return; | |
1981 | case ESpercent: | |
1982 | vc->vc_state = ESnormal; | |
1983 | switch (c) { | |
1984 | case '@': /* defined in ISO 2022 */ | |
1985 | vc->vc_utf = 0; | |
1986 | return; | |
1987 | case 'G': /* prelim official escape code */ | |
1988 | case '8': /* retained for compatibility */ | |
1989 | vc->vc_utf = 1; | |
1990 | return; | |
1991 | } | |
1992 | return; | |
1993 | case ESfunckey: | |
1994 | vc->vc_state = ESnormal; | |
1995 | return; | |
1996 | case EShash: | |
1997 | vc->vc_state = ESnormal; | |
1998 | if (c == '8') { | |
1999 | /* DEC screen alignment test. kludge :-) */ | |
2000 | vc->vc_video_erase_char = | |
2001 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2002 | csi_J(vc, 2); | |
2003 | vc->vc_video_erase_char = | |
2004 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2005 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2006 | } | |
2007 | return; | |
2008 | case ESsetG0: | |
2009 | if (c == '0') | |
2010 | vc->vc_G0_charset = GRAF_MAP; | |
2011 | else if (c == 'B') | |
2012 | vc->vc_G0_charset = LAT1_MAP; | |
2013 | else if (c == 'U') | |
2014 | vc->vc_G0_charset = IBMPC_MAP; | |
2015 | else if (c == 'K') | |
2016 | vc->vc_G0_charset = USER_MAP; | |
2017 | if (vc->vc_charset == 0) | |
2018 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2019 | vc->vc_state = ESnormal; | |
2020 | return; | |
2021 | case ESsetG1: | |
2022 | if (c == '0') | |
2023 | vc->vc_G1_charset = GRAF_MAP; | |
2024 | else if (c == 'B') | |
2025 | vc->vc_G1_charset = LAT1_MAP; | |
2026 | else if (c == 'U') | |
2027 | vc->vc_G1_charset = IBMPC_MAP; | |
2028 | else if (c == 'K') | |
2029 | vc->vc_G1_charset = USER_MAP; | |
2030 | if (vc->vc_charset == 1) | |
2031 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2032 | vc->vc_state = ESnormal; | |
2033 | return; | |
2034 | default: | |
2035 | vc->vc_state = ESnormal; | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | /* This is a temporary buffer used to prepare a tty console write | |
2040 | * so that we can easily avoid touching user space while holding the | |
2041 | * console spinlock. It is allocated in con_init and is shared by | |
2042 | * this code and the vc_screen read/write tty calls. | |
2043 | * | |
2044 | * We have to allocate this statically in the kernel data section | |
2045 | * since console_init (and thus con_init) are called before any | |
2046 | * kernel memory allocation is available. | |
2047 | */ | |
2048 | char con_buf[CON_BUF_SIZE]; | |
c831c338 | 2049 | DEFINE_MUTEX(con_buf_mtx); |
1da177e4 | 2050 | |
2f1a2ccb | 2051 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2052 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2053 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2054 | */ | |
2055 | struct interval { | |
2056 | uint32_t first; | |
2057 | uint32_t last; | |
2058 | }; | |
2059 | ||
2060 | static int bisearch(uint32_t ucs, const struct interval *table, int max) | |
2061 | { | |
2062 | int min = 0; | |
2063 | int mid; | |
2064 | ||
2065 | if (ucs < table[0].first || ucs > table[max].last) | |
2066 | return 0; | |
2067 | while (max >= min) { | |
2068 | mid = (min + max) / 2; | |
2069 | if (ucs > table[mid].last) | |
2070 | min = mid + 1; | |
2071 | else if (ucs < table[mid].first) | |
2072 | max = mid - 1; | |
2073 | else | |
2074 | return 1; | |
2075 | } | |
2076 | return 0; | |
2077 | } | |
2078 | ||
2079 | static int is_double_width(uint32_t ucs) | |
2080 | { | |
2081 | static const struct interval double_width[] = { | |
2082 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2083 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2084 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2085 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2086 | }; |
0f11541b | 2087 | return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); |
2f1a2ccb EK |
2088 | } |
2089 | ||
1da177e4 LT |
2090 | /* acquires console_sem */ |
2091 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2092 | { | |
2093 | #ifdef VT_BUF_VRAM_ONLY | |
2094 | #define FLUSH do { } while(0); | |
2095 | #else | |
2096 | #define FLUSH if (draw_x >= 0) { \ | |
2097 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ | |
2098 | draw_x = -1; \ | |
2099 | } | |
2100 | #endif | |
2101 | ||
2102 | int c, tc, ok, n = 0, draw_x = -1; | |
2103 | unsigned int currcons; | |
2104 | unsigned long draw_from = 0, draw_to = 0; | |
2105 | struct vc_data *vc; | |
2f1a2ccb | 2106 | unsigned char vc_attr; |
0341a4d0 | 2107 | struct vt_notifier_param param; |
2f1a2ccb EK |
2108 | uint8_t rescan; |
2109 | uint8_t inverse; | |
2110 | uint8_t width; | |
1da177e4 LT |
2111 | u16 himask, charmask; |
2112 | const unsigned char *orig_buf = NULL; | |
2113 | int orig_count; | |
2114 | ||
2115 | if (in_interrupt()) | |
2116 | return count; | |
2117 | ||
2118 | might_sleep(); | |
2119 | ||
2120 | acquire_console_sem(); | |
2121 | vc = tty->driver_data; | |
2122 | if (vc == NULL) { | |
2123 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); | |
2124 | release_console_sem(); | |
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | currcons = vc->vc_num; | |
2129 | if (!vc_cons_allocated(currcons)) { | |
2130 | /* could this happen? */ | |
2131 | static int error = 0; | |
2132 | if (!error) { | |
2133 | error = 1; | |
2134 | printk("con_write: tty %d not allocated\n", currcons+1); | |
2135 | } | |
2136 | release_console_sem(); | |
2137 | return 0; | |
2138 | } | |
2139 | release_console_sem(); | |
2140 | ||
2141 | orig_buf = buf; | |
2142 | orig_count = count; | |
2143 | ||
2144 | /* At this point 'buf' is guaranteed to be a kernel buffer | |
2145 | * and therefore no access to userspace (and therefore sleeping) | |
c831c338 | 2146 | * will be needed. The con_buf_mtx serializes all tty based |
1da177e4 LT |
2147 | * console rendering and vcs write/read operations. We hold |
2148 | * the console spinlock during the entire write. | |
2149 | */ | |
2150 | ||
2151 | acquire_console_sem(); | |
2152 | ||
2153 | vc = tty->driver_data; | |
2154 | if (vc == NULL) { | |
2155 | printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n"); | |
2156 | release_console_sem(); | |
2157 | goto out; | |
2158 | } | |
2159 | ||
2160 | himask = vc->vc_hi_font_mask; | |
2161 | charmask = himask ? 0x1ff : 0xff; | |
2162 | ||
2163 | /* undraw cursor first */ | |
2164 | if (IS_FG(vc)) | |
2165 | hide_cursor(vc); | |
2166 | ||
0341a4d0 KD |
2167 | param.vc = vc; |
2168 | ||
1da177e4 LT |
2169 | while (!tty->stopped && count) { |
2170 | int orig = *buf; | |
2171 | c = orig; | |
2172 | buf++; | |
2173 | n++; | |
2174 | count--; | |
2f1a2ccb EK |
2175 | rescan = 0; |
2176 | inverse = 0; | |
2177 | width = 1; | |
1da177e4 LT |
2178 | |
2179 | /* Do no translation at all in control states */ | |
2180 | if (vc->vc_state != ESnormal) { | |
2181 | tc = c; | |
d4328b40 | 2182 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2183 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2184 | * vc_utf_count is the number of continuation bytes still | |
2185 | * expected to arrive. | |
2186 | * vc_npar is the number of continuation bytes arrived so | |
2187 | * far | |
2188 | */ | |
d4328b40 | 2189 | rescan_last_byte: |
2f1a2ccb EK |
2190 | if ((c & 0xc0) == 0x80) { |
2191 | /* Continuation byte received */ | |
2192 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2193 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2194 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2195 | vc->vc_npar++; | |
2196 | if (--vc->vc_utf_count) { | |
2197 | /* Still need some bytes */ | |
1da177e4 | 2198 | continue; |
2f1a2ccb EK |
2199 | } |
2200 | /* Got a whole character */ | |
2201 | c = vc->vc_utf_char; | |
2202 | /* Reject overlong sequences */ | |
2203 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2204 | c > utf8_length_changes[vc->vc_npar]) | |
2205 | c = 0xfffd; | |
2206 | } else { | |
2207 | /* Unexpected continuation byte */ | |
2208 | vc->vc_utf_count = 0; | |
2209 | c = 0xfffd; | |
2210 | } | |
1da177e4 | 2211 | } else { |
2f1a2ccb EK |
2212 | /* Single ASCII byte or first byte of a sequence received */ |
2213 | if (vc->vc_utf_count) { | |
2214 | /* Continuation byte expected */ | |
2215 | rescan = 1; | |
2216 | vc->vc_utf_count = 0; | |
2217 | c = 0xfffd; | |
2218 | } else if (c > 0x7f) { | |
2219 | /* First byte of a multibyte sequence received */ | |
2220 | vc->vc_npar = 0; | |
2221 | if ((c & 0xe0) == 0xc0) { | |
2222 | vc->vc_utf_count = 1; | |
2223 | vc->vc_utf_char = (c & 0x1f); | |
2224 | } else if ((c & 0xf0) == 0xe0) { | |
2225 | vc->vc_utf_count = 2; | |
2226 | vc->vc_utf_char = (c & 0x0f); | |
2227 | } else if ((c & 0xf8) == 0xf0) { | |
2228 | vc->vc_utf_count = 3; | |
2229 | vc->vc_utf_char = (c & 0x07); | |
2230 | } else if ((c & 0xfc) == 0xf8) { | |
2231 | vc->vc_utf_count = 4; | |
2232 | vc->vc_utf_char = (c & 0x03); | |
2233 | } else if ((c & 0xfe) == 0xfc) { | |
2234 | vc->vc_utf_count = 5; | |
2235 | vc->vc_utf_char = (c & 0x01); | |
2236 | } else { | |
2237 | /* 254 and 255 are invalid */ | |
2238 | c = 0xfffd; | |
2239 | } | |
2240 | if (vc->vc_utf_count) { | |
2241 | /* Still need some bytes */ | |
2242 | continue; | |
2243 | } | |
2244 | } | |
2245 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2246 | } |
2f1a2ccb EK |
2247 | /* End of UTF-8 decoding. */ |
2248 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2249 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2250 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2251 | c = 0xfffd; | |
2252 | tc = c; | |
d4328b40 | 2253 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2254 | tc = vc_translate(vc, c); |
1da177e4 LT |
2255 | } |
2256 | ||
0341a4d0 KD |
2257 | param.c = tc; |
2258 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2259 | ¶m) == NOTIFY_STOP) | |
2260 | continue; | |
2261 | ||
1da177e4 LT |
2262 | /* If the original code was a control character we |
2263 | * only allow a glyph to be displayed if the code is | |
2264 | * not normally used (such as for cursor movement) or | |
2265 | * if the disp_ctrl mode has been explicitly enabled. | |
2266 | * Certain characters (as given by the CTRL_ALWAYS | |
2267 | * bitmap) are always displayed as control characters, | |
2268 | * as the console would be pretty useless without | |
2269 | * them; to display an arbitrary font position use the | |
2270 | * direct-to-font zone in UTF-8 mode. | |
2271 | */ | |
2272 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2273 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2274 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2275 | && (c != 127 || vc->vc_disp_ctrl) |
2276 | && (c != 128+27); | |
2277 | ||
2278 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2279 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2280 | if (is_double_width(c)) | |
2281 | width = 2; | |
2282 | } | |
1da177e4 LT |
2283 | /* Now try to find out how to display it */ |
2284 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2285 | if (tc & ~charmask) { |
2f1a2ccb EK |
2286 | if (tc == -1 || tc == -2) { |
2287 | continue; /* nothing to display */ | |
2288 | } | |
2289 | /* Glyph not found */ | |
1ed8a2b3 | 2290 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2291 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2292 | This would make absolutely no sense with Unicode in mind, |
2293 | but do this for ASCII characters since a font may lack | |
2294 | Unicode mapping info and we don't want to end up with | |
2295 | having question marks only. */ | |
2f1a2ccb EK |
2296 | tc = c; |
2297 | } else { | |
2298 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2299 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2300 | if (tc < 0) { | |
2301 | inverse = 1; | |
2302 | tc = conv_uni_to_pc(vc, '?'); | |
2303 | if (tc < 0) tc = '?'; | |
2304 | } | |
2305 | } | |
d4328b40 | 2306 | } |
1da177e4 | 2307 | |
2f1a2ccb EK |
2308 | if (!inverse) { |
2309 | vc_attr = vc->vc_attr; | |
1da177e4 | 2310 | } else { |
2f1a2ccb EK |
2311 | /* invert vc_attr */ |
2312 | if (!vc->vc_can_do_color) { | |
2313 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2314 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2315 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2316 | } else { | |
2317 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2318 | } | |
1ed8a2b3 | 2319 | FLUSH |
1da177e4 | 2320 | } |
2f1a2ccb EK |
2321 | |
2322 | while (1) { | |
2323 | if (vc->vc_need_wrap || vc->vc_decim) | |
2324 | FLUSH | |
2325 | if (vc->vc_need_wrap) { | |
2326 | cr(vc); | |
2327 | lf(vc); | |
2328 | } | |
2329 | if (vc->vc_decim) | |
2330 | insert_char(vc, 1); | |
2331 | scr_writew(himask ? | |
2332 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2333 | (vc_attr << 8) + tc, | |
2334 | (u16 *) vc->vc_pos); | |
2335 | if (DO_UPDATE(vc) && draw_x < 0) { | |
2336 | draw_x = vc->vc_x; | |
2337 | draw_from = vc->vc_pos; | |
2338 | } | |
2339 | if (vc->vc_x == vc->vc_cols - 1) { | |
2340 | vc->vc_need_wrap = vc->vc_decawm; | |
2341 | draw_to = vc->vc_pos + 2; | |
2342 | } else { | |
2343 | vc->vc_x++; | |
2344 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2345 | } |
2f1a2ccb EK |
2346 | |
2347 | if (!--width) break; | |
2348 | ||
2349 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2350 | if (tc < 0) tc = ' '; | |
2351 | } | |
b293d758 | 2352 | notify_write(vc, c); |
2f1a2ccb | 2353 | |
1ed8a2b3 EK |
2354 | if (inverse) { |
2355 | FLUSH | |
2356 | } | |
2357 | ||
2f1a2ccb EK |
2358 | if (rescan) { |
2359 | rescan = 0; | |
2360 | inverse = 0; | |
2361 | width = 1; | |
d4328b40 AT |
2362 | c = orig; |
2363 | goto rescan_last_byte; | |
2364 | } | |
1da177e4 LT |
2365 | continue; |
2366 | } | |
2367 | FLUSH | |
2368 | do_con_trol(tty, vc, orig); | |
2369 | } | |
2370 | FLUSH | |
2371 | console_conditional_schedule(); | |
2372 | release_console_sem(); | |
2373 | ||
2374 | out: | |
b293d758 | 2375 | notify_update(vc); |
1da177e4 LT |
2376 | return n; |
2377 | #undef FLUSH | |
2378 | } | |
2379 | ||
2380 | /* | |
2381 | * This is the console switching callback. | |
2382 | * | |
2383 | * Doing console switching in a process context allows | |
2384 | * us to do the switches asynchronously (needed when we want | |
2385 | * to switch due to a keyboard interrupt). Synchronization | |
2386 | * with other console code and prevention of re-entrancy is | |
2387 | * ensured with console_sem. | |
2388 | */ | |
65f27f38 | 2389 | static void console_callback(struct work_struct *ignored) |
1da177e4 LT |
2390 | { |
2391 | acquire_console_sem(); | |
2392 | ||
2393 | if (want_console >= 0) { | |
2394 | if (want_console != fg_console && | |
2395 | vc_cons_allocated(want_console)) { | |
2396 | hide_cursor(vc_cons[fg_console].d); | |
2397 | change_console(vc_cons[want_console].d); | |
2398 | /* we only changed when the console had already | |
2399 | been allocated - a new console is not created | |
2400 | in an interrupt routine */ | |
2401 | } | |
2402 | want_console = -1; | |
2403 | } | |
2404 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2405 | do_poke_blanked_console = 0; | |
2406 | poke_blanked_console(); | |
2407 | } | |
2408 | if (scrollback_delta) { | |
2409 | struct vc_data *vc = vc_cons[fg_console].d; | |
2410 | clear_selection(); | |
2411 | if (vc->vc_mode == KD_TEXT) | |
2412 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); | |
2413 | scrollback_delta = 0; | |
2414 | } | |
2415 | if (blank_timer_expired) { | |
2416 | do_blank_screen(0); | |
2417 | blank_timer_expired = 0; | |
2418 | } | |
b293d758 | 2419 | notify_update(vc_cons[fg_console].d); |
1da177e4 LT |
2420 | |
2421 | release_console_sem(); | |
2422 | } | |
2423 | ||
b257bc05 | 2424 | int set_console(int nr) |
1da177e4 | 2425 | { |
b257bc05 AJ |
2426 | struct vc_data *vc = vc_cons[fg_console].d; |
2427 | ||
2428 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2429 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2430 | ||
2431 | /* | |
2432 | * Console switch will fail in console_callback() or | |
2433 | * change_console() so there is no point scheduling | |
2434 | * the callback | |
2435 | * | |
2436 | * Existing set_console() users don't check the return | |
2437 | * value so this shouldn't break anything | |
2438 | */ | |
2439 | return -EINVAL; | |
2440 | } | |
2441 | ||
1da177e4 LT |
2442 | want_console = nr; |
2443 | schedule_console_callback(); | |
b257bc05 AJ |
2444 | |
2445 | return 0; | |
1da177e4 LT |
2446 | } |
2447 | ||
2448 | struct tty_driver *console_driver; | |
2449 | ||
2450 | #ifdef CONFIG_VT_CONSOLE | |
2451 | ||
2452 | /* | |
2453 | * Console on virtual terminal | |
2454 | * | |
2455 | * The console must be locked when we get here. | |
2456 | */ | |
2457 | ||
2458 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2459 | { | |
2460 | struct vc_data *vc = vc_cons[fg_console].d; | |
2461 | unsigned char c; | |
b0940003 | 2462 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 LT |
2463 | const ushort *start; |
2464 | ushort cnt = 0; | |
2465 | ushort myx; | |
2466 | ||
2467 | /* console busy or not yet initialized */ | |
b0940003 NP |
2468 | if (!printable) |
2469 | return; | |
2470 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2471 | return; |
2472 | ||
2473 | if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1)) | |
2474 | vc = vc_cons[kmsg_redirect - 1].d; | |
2475 | ||
2476 | /* read `x' only after setting currcons properly (otherwise | |
2477 | the `x' macro will read the x of the foreground console). */ | |
2478 | myx = vc->vc_x; | |
2479 | ||
2480 | if (!vc_cons_allocated(fg_console)) { | |
2481 | /* impossible */ | |
2482 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2483 | goto quit; | |
2484 | } | |
2485 | ||
2486 | if (vc->vc_mode != KD_TEXT) | |
2487 | goto quit; | |
2488 | ||
2489 | /* undraw cursor first */ | |
2490 | if (IS_FG(vc)) | |
2491 | hide_cursor(vc); | |
2492 | ||
2493 | start = (ushort *)vc->vc_pos; | |
2494 | ||
2495 | /* Contrived structure to try to emulate original need_wrap behaviour | |
2496 | * Problems caused when we have need_wrap set on '\n' character */ | |
2497 | while (count--) { | |
2498 | c = *b++; | |
2499 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
2500 | if (cnt > 0) { | |
2501 | if (CON_IS_VISIBLE(vc)) | |
2502 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2503 | vc->vc_x += cnt; | |
2504 | if (vc->vc_need_wrap) | |
2505 | vc->vc_x--; | |
2506 | cnt = 0; | |
2507 | } | |
2508 | if (c == 8) { /* backspace */ | |
2509 | bs(vc); | |
2510 | start = (ushort *)vc->vc_pos; | |
2511 | myx = vc->vc_x; | |
2512 | continue; | |
2513 | } | |
2514 | if (c != 13) | |
2515 | lf(vc); | |
2516 | cr(vc); | |
2517 | start = (ushort *)vc->vc_pos; | |
2518 | myx = vc->vc_x; | |
2519 | if (c == 10 || c == 13) | |
2520 | continue; | |
2521 | } | |
2522 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); | |
b293d758 | 2523 | notify_write(vc, c); |
1da177e4 LT |
2524 | cnt++; |
2525 | if (myx == vc->vc_cols - 1) { | |
2526 | vc->vc_need_wrap = 1; | |
2527 | continue; | |
2528 | } | |
2529 | vc->vc_pos += 2; | |
2530 | myx++; | |
2531 | } | |
2532 | if (cnt > 0) { | |
2533 | if (CON_IS_VISIBLE(vc)) | |
2534 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); | |
2535 | vc->vc_x += cnt; | |
2536 | if (vc->vc_x == vc->vc_cols) { | |
2537 | vc->vc_x--; | |
2538 | vc->vc_need_wrap = 1; | |
2539 | } | |
2540 | } | |
2541 | set_cursor(vc); | |
b293d758 | 2542 | notify_update(vc); |
1da177e4 LT |
2543 | |
2544 | quit: | |
b0940003 | 2545 | spin_unlock(&printing_lock); |
1da177e4 LT |
2546 | } |
2547 | ||
2548 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
2549 | { | |
2550 | *index = c->index ? c->index-1 : fg_console; | |
2551 | return console_driver; | |
2552 | } | |
2553 | ||
2554 | static struct console vt_console_driver = { | |
2555 | .name = "tty", | |
2556 | .write = vt_console_print, | |
2557 | .device = vt_console_device, | |
2558 | .unblank = unblank_screen, | |
2559 | .flags = CON_PRINTBUFFER, | |
2560 | .index = -1, | |
2561 | }; | |
2562 | #endif | |
2563 | ||
2564 | /* | |
2565 | * Handling of Linux-specific VC ioctls | |
2566 | */ | |
2567 | ||
2568 | /* | |
2569 | * Generally a bit racy with respect to console_sem(). | |
2570 | * | |
2571 | * There are some functions which don't need it. | |
2572 | * | |
2573 | * There are some functions which can sleep for arbitrary periods | |
2574 | * (paste_selection) but we don't need the lock there anyway. | |
2575 | * | |
2576 | * set_selection has locking, and definitely needs it | |
2577 | */ | |
2578 | ||
2579 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
2580 | { | |
2581 | char type, data; | |
2582 | char __user *p = (char __user *)arg; | |
2583 | int lines; | |
2584 | int ret; | |
2585 | ||
2586 | if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE) | |
2587 | return -EINVAL; | |
2588 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) | |
2589 | return -EPERM; | |
2590 | if (get_user(type, p)) | |
2591 | return -EFAULT; | |
2592 | ret = 0; | |
04f378b1 AC |
2593 | |
2594 | lock_kernel(); | |
2595 | ||
1da177e4 LT |
2596 | switch (type) |
2597 | { | |
2598 | case TIOCL_SETSEL: | |
2599 | acquire_console_sem(); | |
2600 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); | |
2601 | release_console_sem(); | |
2602 | break; | |
2603 | case TIOCL_PASTESEL: | |
2604 | ret = paste_selection(tty); | |
2605 | break; | |
2606 | case TIOCL_UNBLANKSCREEN: | |
2d237c63 | 2607 | acquire_console_sem(); |
1da177e4 | 2608 | unblank_screen(); |
2d237c63 | 2609 | release_console_sem(); |
1da177e4 LT |
2610 | break; |
2611 | case TIOCL_SELLOADLUT: | |
2612 | ret = sel_loadlut(p); | |
2613 | break; | |
2614 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 2615 | |
1da177e4 LT |
2616 | /* |
2617 | * Make it possible to react to Shift+Mousebutton. | |
2618 | * Note that 'shift_state' is an undocumented | |
2619 | * kernel-internal variable; programs not closely | |
2620 | * related to the kernel should not use this. | |
2621 | */ | |
2622 | data = shift_state; | |
2623 | ret = __put_user(data, p); | |
2624 | break; | |
2625 | case TIOCL_GETMOUSEREPORTING: | |
2626 | data = mouse_reporting(); | |
2627 | ret = __put_user(data, p); | |
2628 | break; | |
2629 | case TIOCL_SETVESABLANK: | |
403aac96 | 2630 | ret = set_vesa_blanking(p); |
1da177e4 | 2631 | break; |
0ca07731 RW |
2632 | case TIOCL_GETKMSGREDIRECT: |
2633 | data = kmsg_redirect; | |
2634 | ret = __put_user(data, p); | |
2635 | break; | |
1da177e4 LT |
2636 | case TIOCL_SETKMSGREDIRECT: |
2637 | if (!capable(CAP_SYS_ADMIN)) { | |
2638 | ret = -EPERM; | |
2639 | } else { | |
2640 | if (get_user(data, p+1)) | |
2641 | ret = -EFAULT; | |
2642 | else | |
2643 | kmsg_redirect = data; | |
2644 | } | |
2645 | break; | |
2646 | case TIOCL_GETFGCONSOLE: | |
2647 | ret = fg_console; | |
2648 | break; | |
2649 | case TIOCL_SCROLLCONSOLE: | |
2650 | if (get_user(lines, (s32 __user *)(p+4))) { | |
2651 | ret = -EFAULT; | |
2652 | } else { | |
2653 | scrollfront(vc_cons[fg_console].d, lines); | |
2654 | ret = 0; | |
2655 | } | |
2656 | break; | |
2657 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
2d237c63 | 2658 | acquire_console_sem(); |
1da177e4 LT |
2659 | ignore_poke = 1; |
2660 | do_blank_screen(0); | |
2d237c63 | 2661 | release_console_sem(); |
1da177e4 LT |
2662 | break; |
2663 | case TIOCL_BLANKEDSCREEN: | |
2664 | ret = console_blanked; | |
2665 | break; | |
2666 | default: | |
2667 | ret = -EINVAL; | |
2668 | break; | |
2669 | } | |
04f378b1 | 2670 | unlock_kernel(); |
1da177e4 LT |
2671 | return ret; |
2672 | } | |
2673 | ||
2674 | /* | |
2675 | * /dev/ttyN handling | |
2676 | */ | |
2677 | ||
2678 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
2679 | { | |
2680 | int retval; | |
2681 | ||
2682 | retval = do_con_write(tty, buf, count); | |
2683 | con_flush_chars(tty); | |
2684 | ||
2685 | return retval; | |
2686 | } | |
2687 | ||
5d19f546 | 2688 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
2689 | { |
2690 | if (in_interrupt()) | |
5d19f546 AC |
2691 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
2692 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
2693 | } |
2694 | ||
2695 | static int con_write_room(struct tty_struct *tty) | |
2696 | { | |
2697 | if (tty->stopped) | |
2698 | return 0; | |
2699 | return 4096; /* No limit, really; we're not buffering */ | |
2700 | } | |
2701 | ||
2702 | static int con_chars_in_buffer(struct tty_struct *tty) | |
2703 | { | |
2704 | return 0; /* we're not buffering */ | |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * con_throttle and con_unthrottle are only used for | |
2709 | * paste_selection(), which has to stuff in a large number of | |
2710 | * characters... | |
2711 | */ | |
2712 | static void con_throttle(struct tty_struct *tty) | |
2713 | { | |
2714 | } | |
2715 | ||
2716 | static void con_unthrottle(struct tty_struct *tty) | |
2717 | { | |
2718 | struct vc_data *vc = tty->driver_data; | |
2719 | ||
2720 | wake_up_interruptible(&vc->paste_wait); | |
2721 | } | |
2722 | ||
2723 | /* | |
2724 | * Turn the Scroll-Lock LED on when the tty is stopped | |
2725 | */ | |
2726 | static void con_stop(struct tty_struct *tty) | |
2727 | { | |
2728 | int console_num; | |
2729 | if (!tty) | |
2730 | return; | |
2731 | console_num = tty->index; | |
2732 | if (!vc_cons_allocated(console_num)) | |
2733 | return; | |
2734 | set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); | |
2735 | set_leds(); | |
2736 | } | |
2737 | ||
2738 | /* | |
2739 | * Turn the Scroll-Lock LED off when the console is started | |
2740 | */ | |
2741 | static void con_start(struct tty_struct *tty) | |
2742 | { | |
2743 | int console_num; | |
2744 | if (!tty) | |
2745 | return; | |
2746 | console_num = tty->index; | |
2747 | if (!vc_cons_allocated(console_num)) | |
2748 | return; | |
2749 | clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); | |
2750 | set_leds(); | |
2751 | } | |
2752 | ||
2753 | static void con_flush_chars(struct tty_struct *tty) | |
2754 | { | |
2755 | struct vc_data *vc; | |
2756 | ||
2757 | if (in_interrupt()) /* from flush_to_ldisc */ | |
2758 | return; | |
2759 | ||
2760 | /* if we race with con_close(), vt may be null */ | |
2761 | acquire_console_sem(); | |
2762 | vc = tty->driver_data; | |
2763 | if (vc) | |
2764 | set_cursor(vc); | |
2765 | release_console_sem(); | |
2766 | } | |
2767 | ||
2768 | /* | |
2769 | * Allocate the console screen memory. | |
2770 | */ | |
2771 | static int con_open(struct tty_struct *tty, struct file *filp) | |
2772 | { | |
2773 | unsigned int currcons = tty->index; | |
2774 | int ret = 0; | |
2775 | ||
2776 | acquire_console_sem(); | |
f786648b | 2777 | if (tty->driver_data == NULL) { |
1da177e4 LT |
2778 | ret = vc_allocate(currcons); |
2779 | if (ret == 0) { | |
2780 | struct vc_data *vc = vc_cons[currcons].d; | |
2781 | tty->driver_data = vc; | |
2782 | vc->vc_tty = tty; | |
2783 | ||
2784 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
2785 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
2786 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
2787 | } | |
c1236d31 ST |
2788 | if (vc->vc_utf) |
2789 | tty->termios->c_iflag |= IUTF8; | |
2790 | else | |
2791 | tty->termios->c_iflag &= ~IUTF8; | |
d09d7ddf | 2792 | vcs_make_sysfs(tty); |
e0426e6a | 2793 | release_console_sem(); |
1da177e4 LT |
2794 | return ret; |
2795 | } | |
2796 | } | |
2797 | release_console_sem(); | |
2798 | return ret; | |
2799 | } | |
2800 | ||
2801 | /* | |
70522e12 | 2802 | * We take tty_mutex in here to prevent another thread from coming in via init_dev |
1da177e4 LT |
2803 | * and taking a ref against the tty while we're in the process of forgetting |
2804 | * about it and cleaning things up. | |
2805 | * | |
d09d7ddf | 2806 | * This is because vcs_remove_sysfs() can sleep and will drop the BKL. |
1da177e4 LT |
2807 | */ |
2808 | static void con_close(struct tty_struct *tty, struct file *filp) | |
2809 | { | |
70522e12 | 2810 | mutex_lock(&tty_mutex); |
1da177e4 LT |
2811 | acquire_console_sem(); |
2812 | if (tty && tty->count == 1) { | |
2813 | struct vc_data *vc = tty->driver_data; | |
2814 | ||
2815 | if (vc) | |
2816 | vc->vc_tty = NULL; | |
2817 | tty->driver_data = NULL; | |
d09d7ddf | 2818 | vcs_remove_sysfs(tty); |
e0426e6a | 2819 | release_console_sem(); |
70522e12 | 2820 | mutex_unlock(&tty_mutex); |
1da177e4 | 2821 | /* |
70522e12 | 2822 | * tty_mutex is released, but we still hold BKL, so there is |
1da177e4 LT |
2823 | * still exclusion against init_dev() |
2824 | */ | |
2825 | return; | |
2826 | } | |
2827 | release_console_sem(); | |
70522e12 | 2828 | mutex_unlock(&tty_mutex); |
1da177e4 LT |
2829 | } |
2830 | ||
fa6ce9ab JE |
2831 | static int default_italic_color = 2; // green (ASCII) |
2832 | static int default_underline_color = 3; // cyan (ASCII) | |
2833 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); | |
2834 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
2835 | ||
1da177e4 LT |
2836 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2837 | unsigned int cols, int do_clear) | |
2838 | { | |
2839 | int j, k ; | |
2840 | ||
2841 | vc->vc_cols = cols; | |
2842 | vc->vc_rows = rows; | |
2843 | vc->vc_size_row = cols << 1; | |
2844 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
2845 | ||
2846 | set_origin(vc); | |
2847 | vc->vc_pos = vc->vc_origin; | |
2848 | reset_vc(vc); | |
2849 | for (j=k=0; j<16; j++) { | |
2850 | vc->vc_palette[k++] = default_red[j] ; | |
2851 | vc->vc_palette[k++] = default_grn[j] ; | |
2852 | vc->vc_palette[k++] = default_blu[j] ; | |
2853 | } | |
2854 | vc->vc_def_color = 0x07; /* white */ | |
fa6ce9ab JE |
2855 | vc->vc_ulcolor = default_underline_color; |
2856 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
2857 | vc->vc_halfcolor = 0x08; /* grey */ |
2858 | init_waitqueue_head(&vc->paste_wait); | |
2859 | reset_terminal(vc, do_clear); | |
2860 | } | |
2861 | ||
2862 | /* | |
2863 | * This routine initializes console interrupts, and does nothing | |
2864 | * else. If you want the screen to clear, call tty_write with | |
2865 | * the appropriate escape-sequence. | |
2866 | */ | |
2867 | ||
2868 | static int __init con_init(void) | |
2869 | { | |
2870 | const char *display_desc = NULL; | |
2871 | struct vc_data *vc; | |
3e795de7 | 2872 | unsigned int currcons = 0, i; |
1da177e4 LT |
2873 | |
2874 | acquire_console_sem(); | |
2875 | ||
2876 | if (conswitchp) | |
2877 | display_desc = conswitchp->con_startup(); | |
2878 | if (!display_desc) { | |
2879 | fg_console = 0; | |
2880 | release_console_sem(); | |
2881 | return 0; | |
2882 | } | |
2883 | ||
3e795de7 AD |
2884 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
2885 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
2886 | ||
2887 | if (con_driver->con == NULL) { | |
2888 | con_driver->con = conswitchp; | |
2889 | con_driver->desc = display_desc; | |
2890 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
2891 | con_driver->first = 0; | |
2892 | con_driver->last = MAX_NR_CONSOLES - 1; | |
2893 | break; | |
2894 | } | |
2895 | } | |
2896 | ||
2897 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
2898 | con_driver_map[i] = conswitchp; | |
2899 | ||
1da177e4 LT |
2900 | if (blankinterval) { |
2901 | blank_state = blank_normal_wait; | |
2902 | mod_timer(&console_timer, jiffies + blankinterval); | |
2903 | } | |
2904 | ||
2905 | /* | |
2906 | * kmalloc is not running yet - we use the bootmem allocator. | |
2907 | */ | |
2908 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { | |
2909 | vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data)); | |
7f1f86a0 | 2910 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
1da177e4 LT |
2911 | visual_init(vc, currcons, 1); |
2912 | vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size); | |
2913 | vc->vc_kmalloced = 0; | |
2914 | vc_init(vc, vc->vc_rows, vc->vc_cols, | |
2915 | currcons || !vc->vc_sw->con_save_screen); | |
2916 | } | |
2917 | currcons = fg_console = 0; | |
2918 | master_display_fg = vc = vc_cons[currcons].d; | |
2919 | set_origin(vc); | |
2920 | save_screen(vc); | |
2921 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
2922 | csi_J(vc, 0); | |
2923 | update_screen(vc); | |
2924 | printk("Console: %s %s %dx%d", | |
2925 | vc->vc_can_do_color ? "colour" : "mono", | |
2926 | display_desc, vc->vc_cols, vc->vc_rows); | |
2927 | printable = 1; | |
2928 | printk("\n"); | |
2929 | ||
2930 | release_console_sem(); | |
2931 | ||
2932 | #ifdef CONFIG_VT_CONSOLE | |
2933 | register_console(&vt_console_driver); | |
2934 | #endif | |
2935 | return 0; | |
2936 | } | |
2937 | console_initcall(con_init); | |
2938 | ||
b68e31d0 | 2939 | static const struct tty_operations con_ops = { |
1da177e4 LT |
2940 | .open = con_open, |
2941 | .close = con_close, | |
2942 | .write = con_write, | |
2943 | .write_room = con_write_room, | |
2944 | .put_char = con_put_char, | |
2945 | .flush_chars = con_flush_chars, | |
2946 | .chars_in_buffer = con_chars_in_buffer, | |
2947 | .ioctl = vt_ioctl, | |
2948 | .stop = con_stop, | |
2949 | .start = con_start, | |
2950 | .throttle = con_throttle, | |
2951 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 2952 | .resize = vt_resize, |
1da177e4 LT |
2953 | }; |
2954 | ||
2955 | int __init vty_init(void) | |
2956 | { | |
2957 | vcs_init(); | |
2958 | ||
2959 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
2960 | if (!console_driver) | |
2961 | panic("Couldn't allocate console driver\n"); | |
2962 | console_driver->owner = THIS_MODULE; | |
1da177e4 LT |
2963 | console_driver->name = "tty"; |
2964 | console_driver->name_base = 1; | |
2965 | console_driver->major = TTY_MAJOR; | |
2966 | console_driver->minor_start = 1; | |
2967 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
2968 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
2969 | if (default_utf8) |
2970 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
2971 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
2972 | tty_set_operations(console_driver, &con_ops); | |
2973 | if (tty_register_driver(console_driver)) | |
2974 | panic("Couldn't register console driver\n"); | |
2975 | ||
2976 | kbd_init(); | |
2977 | console_map_init(); | |
2978 | #ifdef CONFIG_PROM_CONSOLE | |
2979 | prom_con_init(); | |
2980 | #endif | |
2981 | #ifdef CONFIG_MDA_CONSOLE | |
2982 | mda_console_init(); | |
2983 | #endif | |
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
2988 | #include <linux/device.h> |
2989 | ||
2990 | static struct class *vtconsole_class; | |
2991 | ||
b7269dd2 JB |
2992 | static int bind_con_driver(const struct consw *csw, int first, int last, |
2993 | int deflt) | |
1da177e4 | 2994 | { |
3e795de7 AD |
2995 | struct module *owner = csw->owner; |
2996 | const char *desc = NULL; | |
2997 | struct con_driver *con_driver; | |
2998 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 2999 | |
1da177e4 LT |
3000 | if (!try_module_get(owner)) |
3001 | return -ENODEV; | |
3002 | ||
1c8ce271 | 3003 | acquire_console_sem(); |
1c8ce271 | 3004 | |
3e795de7 AD |
3005 | /* check if driver is registered */ |
3006 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3007 | con_driver = ®istered_con_driver[i]; | |
3008 | ||
3009 | if (con_driver->con == csw) { | |
3010 | desc = con_driver->desc; | |
3011 | retval = 0; | |
3012 | break; | |
3013 | } | |
3014 | } | |
3015 | ||
3016 | if (retval) | |
3017 | goto err; | |
3018 | ||
3019 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3020 | csw->con_startup(); | |
3021 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3022 | } |
1c8ce271 | 3023 | |
1da177e4 LT |
3024 | if (deflt) { |
3025 | if (conswitchp) | |
3026 | module_put(conswitchp->owner); | |
1c8ce271 | 3027 | |
1da177e4 LT |
3028 | __module_get(owner); |
3029 | conswitchp = csw; | |
3030 | } | |
3031 | ||
3e795de7 AD |
3032 | first = max(first, con_driver->first); |
3033 | last = min(last, con_driver->last); | |
3034 | ||
1da177e4 LT |
3035 | for (i = first; i <= last; i++) { |
3036 | int old_was_color; | |
3037 | struct vc_data *vc = vc_cons[i].d; | |
3038 | ||
3039 | if (con_driver_map[i]) | |
3040 | module_put(con_driver_map[i]->owner); | |
3041 | __module_get(owner); | |
3042 | con_driver_map[i] = csw; | |
3043 | ||
3044 | if (!vc || !vc->vc_sw) | |
3045 | continue; | |
3046 | ||
3047 | j = i; | |
1c8ce271 | 3048 | |
4ee1acce DH |
3049 | if (CON_IS_VISIBLE(vc)) { |
3050 | k = i; | |
1da177e4 | 3051 | save_screen(vc); |
4ee1acce DH |
3052 | } |
3053 | ||
1da177e4 LT |
3054 | old_was_color = vc->vc_can_do_color; |
3055 | vc->vc_sw->con_deinit(vc); | |
3056 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
1da177e4 | 3057 | visual_init(vc, i, 0); |
1c8ce271 | 3058 | set_origin(vc); |
1da177e4 LT |
3059 | update_attr(vc); |
3060 | ||
3061 | /* If the console changed between mono <-> color, then | |
3062 | * the attributes in the screenbuf will be wrong. The | |
3063 | * following resets all attributes to something sane. | |
3064 | */ | |
3065 | if (old_was_color != vc->vc_can_do_color) | |
3066 | clear_buffer_attributes(vc); | |
1da177e4 | 3067 | } |
4ee1acce | 3068 | |
1da177e4 LT |
3069 | printk("Console: switching "); |
3070 | if (!deflt) | |
3071 | printk("consoles %d-%d ", first+1, last+1); | |
4ee1acce DH |
3072 | if (j >= 0) { |
3073 | struct vc_data *vc = vc_cons[j].d; | |
3074 | ||
1da177e4 | 3075 | printk("to %s %s %dx%d\n", |
4ee1acce DH |
3076 | vc->vc_can_do_color ? "colour" : "mono", |
3077 | desc, vc->vc_cols, vc->vc_rows); | |
3078 | ||
3079 | if (k >= 0) { | |
3080 | vc = vc_cons[k].d; | |
3081 | update_screen(vc); | |
3082 | } | |
3083 | } else | |
1da177e4 LT |
3084 | printk("to %s\n", desc); |
3085 | ||
3e795de7 AD |
3086 | retval = 0; |
3087 | err: | |
1da177e4 | 3088 | release_console_sem(); |
1da177e4 | 3089 | module_put(owner); |
3e795de7 AD |
3090 | return retval; |
3091 | }; | |
1da177e4 | 3092 | |
13ae6645 AD |
3093 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
3094 | static int con_is_graphics(const struct consw *csw, int first, int last) | |
3095 | { | |
3096 | int i, retval = 0; | |
3097 | ||
3098 | for (i = first; i <= last; i++) { | |
3099 | struct vc_data *vc = vc_cons[i].d; | |
3100 | ||
3101 | if (vc && vc->vc_mode == KD_GRAPHICS) { | |
3102 | retval = 1; | |
3103 | break; | |
3104 | } | |
3105 | } | |
3106 | ||
3107 | return retval; | |
3108 | } | |
3109 | ||
b7269dd2 JB |
3110 | /** |
3111 | * unbind_con_driver - unbind a console driver | |
3112 | * @csw: pointer to console driver to unregister | |
3113 | * @first: first in range of consoles that @csw should be unbound from | |
3114 | * @last: last in range of consoles that @csw should be unbound from | |
3115 | * @deflt: should next bound console driver be default after @csw is unbound? | |
3116 | * | |
3117 | * To unbind a driver from all possible consoles, pass 0 as @first and | |
3118 | * %MAX_NR_CONSOLES as @last. | |
3119 | * | |
3120 | * @deflt controls whether the console that ends up replacing @csw should be | |
3121 | * the default console. | |
3122 | * | |
3123 | * RETURNS: | |
3124 | * -ENODEV if @csw isn't a registered console driver or can't be unregistered | |
3125 | * or 0 on success. | |
3126 | */ | |
623e71b0 | 3127 | int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) |
1da177e4 | 3128 | { |
3e795de7 AD |
3129 | struct module *owner = csw->owner; |
3130 | const struct consw *defcsw = NULL; | |
3131 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3132 | int i, retval = -ENODEV; | |
1da177e4 | 3133 | |
3e795de7 AD |
3134 | if (!try_module_get(owner)) |
3135 | return -ENODEV; | |
3136 | ||
3137 | acquire_console_sem(); | |
3138 | ||
3139 | /* check if driver is registered and if it is unbindable */ | |
3140 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3141 | con_driver = ®istered_con_driver[i]; | |
3142 | ||
3143 | if (con_driver->con == csw && | |
6db4063c | 3144 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3145 | retval = 0; |
3146 | break; | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | if (retval) { | |
3151 | release_console_sem(); | |
3152 | goto err; | |
3153 | } | |
3154 | ||
6db4063c AD |
3155 | retval = -ENODEV; |
3156 | ||
3e795de7 AD |
3157 | /* check if backup driver exists */ |
3158 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3159 | con_back = ®istered_con_driver[i]; | |
3160 | ||
3161 | if (con_back->con && | |
6db4063c | 3162 | !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { |
3e795de7 AD |
3163 | defcsw = con_back->con; |
3164 | retval = 0; | |
3165 | break; | |
3166 | } | |
3167 | } | |
3168 | ||
3169 | if (retval) { | |
3170 | release_console_sem(); | |
3171 | goto err; | |
3172 | } | |
3173 | ||
3174 | if (!con_is_bound(csw)) { | |
3175 | release_console_sem(); | |
3176 | goto err; | |
3177 | } | |
3178 | ||
3179 | first = max(first, con_driver->first); | |
3180 | last = min(last, con_driver->last); | |
3181 | ||
3182 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3183 | if (con_driver_map[i] == csw) { |
3184 | module_put(csw->owner); | |
3185 | con_driver_map[i] = NULL; | |
3186 | } | |
3e795de7 AD |
3187 | } |
3188 | ||
3189 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3190 | const struct consw *defconsw = conswitchp; |
3191 | ||
3e795de7 AD |
3192 | defcsw->con_startup(); |
3193 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3194 | /* |
3195 | * vgacon may change the default driver to point | |
3196 | * to dummycon, we restore it here... | |
3197 | */ | |
3198 | conswitchp = defconsw; | |
3e795de7 AD |
3199 | } |
3200 | ||
3201 | if (!con_is_bound(csw)) | |
3202 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3203 | ||
3204 | release_console_sem(); | |
6db4063c AD |
3205 | /* ignore return value, binding should not fail */ |
3206 | bind_con_driver(defcsw, first, last, deflt); | |
3e795de7 AD |
3207 | err: |
3208 | module_put(owner); | |
3209 | return retval; | |
3210 | ||
3211 | } | |
623e71b0 | 3212 | EXPORT_SYMBOL(unbind_con_driver); |
3e795de7 | 3213 | |
6db4063c AD |
3214 | static int vt_bind(struct con_driver *con) |
3215 | { | |
3216 | const struct consw *defcsw = NULL, *csw = NULL; | |
3217 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3218 | ||
3219 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3220 | con_is_graphics(con->con, con->first, con->last)) | |
3221 | goto err; | |
3222 | ||
3223 | csw = con->con; | |
3224 | ||
3225 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3226 | struct con_driver *con = ®istered_con_driver[i]; | |
3227 | ||
3228 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3229 | defcsw = con->con; | |
3230 | break; | |
3231 | } | |
3232 | } | |
3233 | ||
3234 | if (!defcsw) | |
3235 | goto err; | |
3236 | ||
3237 | while (more) { | |
3238 | more = 0; | |
3239 | ||
3240 | for (i = con->first; i <= con->last; i++) { | |
3241 | if (con_driver_map[i] == defcsw) { | |
3242 | if (first == -1) | |
3243 | first = i; | |
3244 | last = i; | |
3245 | more = 1; | |
3246 | } else if (first != -1) | |
3247 | break; | |
3248 | } | |
3249 | ||
3250 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3251 | deflt = 1; | |
3252 | ||
3253 | if (first != -1) | |
3254 | bind_con_driver(csw, first, last, deflt); | |
3255 | ||
3256 | first = -1; | |
3257 | last = -1; | |
3258 | deflt = 0; | |
3259 | } | |
3260 | ||
3261 | err: | |
3262 | return 0; | |
3263 | } | |
3264 | ||
3265 | static int vt_unbind(struct con_driver *con) | |
3266 | { | |
3267 | const struct consw *csw = NULL; | |
3268 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3269 | ||
3270 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || | |
3271 | con_is_graphics(con->con, con->first, con->last)) | |
3272 | goto err; | |
3273 | ||
3274 | csw = con->con; | |
3275 | ||
3276 | while (more) { | |
3277 | more = 0; | |
3278 | ||
3279 | for (i = con->first; i <= con->last; i++) { | |
3280 | if (con_driver_map[i] == csw) { | |
3281 | if (first == -1) | |
3282 | first = i; | |
3283 | last = i; | |
3284 | more = 1; | |
3285 | } else if (first != -1) | |
3286 | break; | |
3287 | } | |
3288 | ||
3289 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3290 | deflt = 1; | |
3291 | ||
3292 | if (first != -1) | |
3293 | unbind_con_driver(csw, first, last, deflt); | |
3294 | ||
3295 | first = -1; | |
3296 | last = -1; | |
3297 | deflt = 0; | |
3298 | } | |
3299 | ||
3300 | err: | |
3301 | return 0; | |
3302 | } | |
13ae6645 AD |
3303 | #else |
3304 | static inline int vt_bind(struct con_driver *con) | |
3305 | { | |
3306 | return 0; | |
3307 | } | |
3308 | static inline int vt_unbind(struct con_driver *con) | |
3309 | { | |
3310 | return 0; | |
3311 | } | |
3312 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3313 | |
805952a8 | 3314 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3315 | const char *buf, size_t count) |
3316 | { | |
805952a8 | 3317 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3318 | int bind = simple_strtoul(buf, NULL, 0); |
3319 | ||
3320 | if (bind) | |
3321 | vt_bind(con); | |
3322 | else | |
3323 | vt_unbind(con); | |
3324 | ||
3325 | return count; | |
3326 | } | |
3327 | ||
805952a8 GKH |
3328 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3329 | char *buf) | |
6db4063c | 3330 | { |
805952a8 | 3331 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3332 | int bind = con_is_bound(con->con); |
3333 | ||
3334 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3335 | } | |
3336 | ||
805952a8 GKH |
3337 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3338 | char *buf) | |
6db4063c | 3339 | { |
805952a8 | 3340 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3341 | |
3342 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3343 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3344 | con->desc); | |
3345 | ||
3346 | } | |
3347 | ||
805952a8 | 3348 | static struct device_attribute device_attrs[] = { |
6db4063c AD |
3349 | __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), |
3350 | __ATTR(name, S_IRUGO, show_name, NULL), | |
3351 | }; | |
3352 | ||
805952a8 | 3353 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c AD |
3354 | { |
3355 | int i; | |
928e964f | 3356 | int error = 0; |
6db4063c | 3357 | |
928e964f | 3358 | con->flag |= CON_DRIVER_FLAG_ATTR; |
805952a8 GKH |
3359 | dev_set_drvdata(con->dev, con); |
3360 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { | |
3361 | error = device_create_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3362 | if (error) |
3363 | break; | |
3364 | } | |
6db4063c | 3365 | |
928e964f AD |
3366 | if (error) { |
3367 | while (--i >= 0) | |
805952a8 | 3368 | device_remove_file(con->dev, &device_attrs[i]); |
928e964f AD |
3369 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3370 | } | |
3371 | ||
3372 | return error; | |
6db4063c AD |
3373 | } |
3374 | ||
805952a8 | 3375 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c AD |
3376 | { |
3377 | int i; | |
3378 | ||
928e964f | 3379 | if (con->flag & CON_DRIVER_FLAG_ATTR) { |
805952a8 GKH |
3380 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) |
3381 | device_remove_file(con->dev, &device_attrs[i]); | |
928e964f AD |
3382 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
3383 | } | |
6db4063c AD |
3384 | } |
3385 | ||
3e795de7 AD |
3386 | /** |
3387 | * con_is_bound - checks if driver is bound to the console | |
3388 | * @csw: console driver | |
3389 | * | |
3390 | * RETURNS: zero if unbound, nonzero if bound | |
3391 | * | |
3392 | * Drivers can call this and if zero, they should release | |
3393 | * all resources allocated on con_startup() | |
3394 | */ | |
3395 | int con_is_bound(const struct consw *csw) | |
3396 | { | |
3397 | int i, bound = 0; | |
3398 | ||
3399 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
3400 | if (con_driver_map[i] == csw) { | |
3401 | bound = 1; | |
3402 | break; | |
3403 | } | |
3404 | } | |
3405 | ||
3406 | return bound; | |
3407 | } | |
3408 | EXPORT_SYMBOL(con_is_bound); | |
3409 | ||
3410 | /** | |
3411 | * register_con_driver - register console driver to console layer | |
3412 | * @csw: console driver | |
3413 | * @first: the first console to take over, minimum value is 0 | |
3414 | * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 | |
3415 | * | |
3416 | * DESCRIPTION: This function registers a console driver which can later | |
3417 | * bind to a range of consoles specified by @first and @last. It will | |
3418 | * also initialize the console driver by calling con_startup(). | |
3419 | */ | |
3420 | int register_con_driver(const struct consw *csw, int first, int last) | |
3421 | { | |
3422 | struct module *owner = csw->owner; | |
3423 | struct con_driver *con_driver; | |
3424 | const char *desc; | |
3425 | int i, retval = 0; | |
3426 | ||
3427 | if (!try_module_get(owner)) | |
3428 | return -ENODEV; | |
3429 | ||
3430 | acquire_console_sem(); | |
3431 | ||
3432 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3433 | con_driver = ®istered_con_driver[i]; | |
3434 | ||
3435 | /* already registered */ | |
3436 | if (con_driver->con == csw) | |
3437 | retval = -EINVAL; | |
3438 | } | |
3439 | ||
3440 | if (retval) | |
3441 | goto err; | |
3442 | ||
3443 | desc = csw->con_startup(); | |
3444 | ||
3445 | if (!desc) | |
3446 | goto err; | |
3447 | ||
3448 | retval = -EINVAL; | |
3449 | ||
3450 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3451 | con_driver = ®istered_con_driver[i]; | |
3452 | ||
3453 | if (con_driver->con == NULL) { | |
3454 | con_driver->con = csw; | |
3455 | con_driver->desc = desc; | |
6db4063c AD |
3456 | con_driver->node = i; |
3457 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
3458 | CON_DRIVER_FLAG_INIT; |
3459 | con_driver->first = first; | |
3460 | con_driver->last = last; | |
3461 | retval = 0; | |
3462 | break; | |
3463 | } | |
3464 | } | |
3465 | ||
6db4063c AD |
3466 | if (retval) |
3467 | goto err; | |
3468 | ||
47aa5793 GKH |
3469 | con_driver->dev = device_create_drvdata(vtconsole_class, NULL, |
3470 | MKDEV(0, con_driver->node), | |
3471 | NULL, "vtcon%i", | |
3472 | con_driver->node); | |
6db4063c | 3473 | |
805952a8 GKH |
3474 | if (IS_ERR(con_driver->dev)) { |
3475 | printk(KERN_WARNING "Unable to create device for %s; " | |
6db4063c | 3476 | "errno = %ld\n", con_driver->desc, |
805952a8 GKH |
3477 | PTR_ERR(con_driver->dev)); |
3478 | con_driver->dev = NULL; | |
6db4063c | 3479 | } else { |
805952a8 | 3480 | vtconsole_init_device(con_driver); |
6db4063c | 3481 | } |
928e964f | 3482 | |
3e795de7 AD |
3483 | err: |
3484 | release_console_sem(); | |
3485 | module_put(owner); | |
3486 | return retval; | |
3487 | } | |
3488 | EXPORT_SYMBOL(register_con_driver); | |
3489 | ||
3490 | /** | |
3491 | * unregister_con_driver - unregister console driver from console layer | |
3492 | * @csw: console driver | |
3493 | * | |
3494 | * DESCRIPTION: All drivers that registers to the console layer must | |
3495 | * call this function upon exit, or if the console driver is in a state | |
3496 | * where it won't be able to handle console services, such as the | |
3497 | * framebuffer console without loaded framebuffer drivers. | |
3498 | * | |
3499 | * The driver must unbind first prior to unregistration. | |
3500 | */ | |
3501 | int unregister_con_driver(const struct consw *csw) | |
3502 | { | |
3503 | int i, retval = -ENODEV; | |
3504 | ||
3505 | acquire_console_sem(); | |
3506 | ||
3507 | /* cannot unregister a bound driver */ | |
3508 | if (con_is_bound(csw)) | |
3509 | goto err; | |
3510 | ||
3511 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3512 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3513 | ||
3514 | if (con_driver->con == csw && | |
6db4063c | 3515 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
805952a8 GKH |
3516 | vtconsole_deinit_device(con_driver); |
3517 | device_destroy(vtconsole_class, | |
3518 | MKDEV(0, con_driver->node)); | |
3e795de7 AD |
3519 | con_driver->con = NULL; |
3520 | con_driver->desc = NULL; | |
805952a8 | 3521 | con_driver->dev = NULL; |
6db4063c | 3522 | con_driver->node = 0; |
3e795de7 AD |
3523 | con_driver->flag = 0; |
3524 | con_driver->first = 0; | |
3525 | con_driver->last = 0; | |
3526 | retval = 0; | |
3527 | break; | |
3528 | } | |
3529 | } | |
3e795de7 AD |
3530 | err: |
3531 | release_console_sem(); | |
3532 | return retval; | |
3533 | } | |
3534 | EXPORT_SYMBOL(unregister_con_driver); | |
3535 | ||
3536 | /* | |
3537 | * If we support more console drivers, this function is used | |
3538 | * when a driver wants to take over some existing consoles | |
3539 | * and become default driver for newly opened ones. | |
3540 | * | |
3541 | * take_over_console is basically a register followed by unbind | |
3542 | */ | |
3543 | int take_over_console(const struct consw *csw, int first, int last, int deflt) | |
3544 | { | |
3545 | int err; | |
3546 | ||
3547 | err = register_con_driver(csw, first, last); | |
3548 | ||
3549 | if (!err) | |
6db4063c | 3550 | bind_con_driver(csw, first, last, deflt); |
3e795de7 AD |
3551 | |
3552 | return err; | |
3553 | } | |
3554 | ||
3555 | /* | |
3556 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
3557 | * work if driver is fully unbound. | |
3558 | */ | |
3559 | void give_up_console(const struct consw *csw) | |
3560 | { | |
3561 | unregister_con_driver(csw); | |
3562 | } | |
3563 | ||
6db4063c | 3564 | static int __init vtconsole_class_init(void) |
3e795de7 | 3565 | { |
6db4063c | 3566 | int i; |
3e795de7 | 3567 | |
6db4063c AD |
3568 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
3569 | if (IS_ERR(vtconsole_class)) { | |
3570 | printk(KERN_WARNING "Unable to create vt console class; " | |
3571 | "errno = %ld\n", PTR_ERR(vtconsole_class)); | |
3572 | vtconsole_class = NULL; | |
3573 | } | |
3e795de7 | 3574 | |
6db4063c | 3575 | /* Add system drivers to sysfs */ |
3e795de7 AD |
3576 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3577 | struct con_driver *con = ®istered_con_driver[i]; | |
3578 | ||
805952a8 | 3579 | if (con->con && !con->dev) { |
47aa5793 GKH |
3580 | con->dev = device_create_drvdata(vtconsole_class, NULL, |
3581 | MKDEV(0, con->node), | |
3582 | NULL, "vtcon%i", | |
3583 | con->node); | |
6db4063c | 3584 | |
805952a8 | 3585 | if (IS_ERR(con->dev)) { |
6db4063c | 3586 | printk(KERN_WARNING "Unable to create " |
805952a8 GKH |
3587 | "device for %s; errno = %ld\n", |
3588 | con->desc, PTR_ERR(con->dev)); | |
3589 | con->dev = NULL; | |
6db4063c | 3590 | } else { |
805952a8 | 3591 | vtconsole_init_device(con); |
6db4063c | 3592 | } |
3e795de7 | 3593 | } |
3e795de7 AD |
3594 | } |
3595 | ||
3e795de7 AD |
3596 | return 0; |
3597 | } | |
6db4063c | 3598 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 3599 | |
1da177e4 LT |
3600 | #endif |
3601 | ||
3602 | /* | |
3603 | * Screen blanking | |
3604 | */ | |
3605 | ||
403aac96 | 3606 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 3607 | { |
403aac96 YY |
3608 | unsigned int mode; |
3609 | ||
3610 | if (get_user(mode, p + 1)) | |
3611 | return -EFAULT; | |
3612 | ||
3613 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
3614 | return 0; | |
1da177e4 LT |
3615 | } |
3616 | ||
1da177e4 LT |
3617 | void do_blank_screen(int entering_gfx) |
3618 | { | |
3619 | struct vc_data *vc = vc_cons[fg_console].d; | |
3620 | int i; | |
3621 | ||
3622 | WARN_CONSOLE_UNLOCKED(); | |
3623 | ||
3624 | if (console_blanked) { | |
3625 | if (blank_state == blank_vesa_wait) { | |
3626 | blank_state = blank_off; | |
d060a321 | 3627 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
3628 | } |
3629 | return; | |
3630 | } | |
1da177e4 LT |
3631 | |
3632 | /* entering graphics mode? */ | |
3633 | if (entering_gfx) { | |
3634 | hide_cursor(vc); | |
3635 | save_screen(vc); | |
3636 | vc->vc_sw->con_blank(vc, -1, 1); | |
3637 | console_blanked = fg_console + 1; | |
b6e8f00f | 3638 | blank_state = blank_off; |
1da177e4 LT |
3639 | set_origin(vc); |
3640 | return; | |
3641 | } | |
3642 | ||
b6e8f00f | 3643 | if (blank_state != blank_normal_wait) |
3644 | return; | |
3645 | blank_state = blank_off; | |
3646 | ||
1da177e4 LT |
3647 | /* don't blank graphics */ |
3648 | if (vc->vc_mode != KD_TEXT) { | |
3649 | console_blanked = fg_console + 1; | |
3650 | return; | |
3651 | } | |
3652 | ||
3653 | hide_cursor(vc); | |
3654 | del_timer_sync(&console_timer); | |
3655 | blank_timer_expired = 0; | |
3656 | ||
3657 | save_screen(vc); | |
3658 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 3659 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
3660 | console_blanked = fg_console + 1; |
3661 | if (i) | |
3662 | set_origin(vc); | |
3663 | ||
3664 | if (console_blank_hook && console_blank_hook(1)) | |
3665 | return; | |
3666 | ||
d060a321 | 3667 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 3668 | blank_state = blank_vesa_wait; |
1da177e4 LT |
3669 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
3670 | } | |
1da177e4 LT |
3671 | } |
3672 | EXPORT_SYMBOL(do_blank_screen); | |
3673 | ||
3674 | /* | |
3675 | * Called by timer as well as from vt_console_driver | |
3676 | */ | |
3677 | void do_unblank_screen(int leaving_gfx) | |
3678 | { | |
3679 | struct vc_data *vc; | |
3680 | ||
3681 | /* This should now always be called from a "sane" (read: can schedule) | |
3682 | * context for the sake of the low level drivers, except in the special | |
3683 | * case of oops_in_progress | |
3684 | */ | |
3685 | if (!oops_in_progress) | |
3686 | might_sleep(); | |
3687 | ||
3688 | WARN_CONSOLE_UNLOCKED(); | |
3689 | ||
3690 | ignore_poke = 0; | |
3691 | if (!console_blanked) | |
3692 | return; | |
3693 | if (!vc_cons_allocated(fg_console)) { | |
3694 | /* impossible */ | |
3695 | printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); | |
3696 | return; | |
3697 | } | |
3698 | vc = vc_cons[fg_console].d; | |
3699 | if (vc->vc_mode != KD_TEXT) | |
3700 | return; /* but leave console_blanked != 0 */ | |
3701 | ||
3702 | if (blankinterval) { | |
3703 | mod_timer(&console_timer, jiffies + blankinterval); | |
3704 | blank_state = blank_normal_wait; | |
3705 | } | |
3706 | ||
3707 | console_blanked = 0; | |
3708 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) | |
3709 | /* Low-level driver cannot restore -> do it ourselves */ | |
3710 | update_screen(vc); | |
3711 | if (console_blank_hook) | |
3712 | console_blank_hook(0); | |
3713 | set_palette(vc); | |
3714 | set_cursor(vc); | |
3715 | } | |
3716 | EXPORT_SYMBOL(do_unblank_screen); | |
3717 | ||
3718 | /* | |
3719 | * This is called by the outside world to cause a forced unblank, mostly for | |
3720 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
3721 | * call it with 1 as an argument and so force a mode restore... that may kill | |
3722 | * X or at least garbage the screen but would also make the Oops visible... | |
3723 | */ | |
3724 | void unblank_screen(void) | |
3725 | { | |
3726 | do_unblank_screen(0); | |
3727 | } | |
3728 | ||
3729 | /* | |
70522e12 | 3730 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 3731 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 3732 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 LT |
3733 | */ |
3734 | static void blank_screen_t(unsigned long dummy) | |
3735 | { | |
cc63b1e1 JB |
3736 | if (unlikely(!keventd_up())) { |
3737 | mod_timer(&console_timer, jiffies + blankinterval); | |
3738 | return; | |
3739 | } | |
1da177e4 LT |
3740 | blank_timer_expired = 1; |
3741 | schedule_work(&console_work); | |
3742 | } | |
3743 | ||
3744 | void poke_blanked_console(void) | |
3745 | { | |
3746 | WARN_CONSOLE_UNLOCKED(); | |
3747 | ||
3748 | /* Add this so we quickly catch whoever might call us in a non | |
3749 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
3750 | * atomic contexts and is allowed to schedule (with the special case | |
3751 | * of oops_in_progress, but that isn't of any concern for this | |
3752 | * function. --BenH. | |
3753 | */ | |
3754 | might_sleep(); | |
3755 | ||
3756 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
3757 | * at worse, we'll do a spurrious blank and it's unlikely | |
3758 | */ | |
3759 | del_timer(&console_timer); | |
3760 | blank_timer_expired = 0; | |
3761 | ||
3762 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
3763 | return; | |
3764 | if (console_blanked) | |
3765 | unblank_screen(); | |
3766 | else if (blankinterval) { | |
3767 | mod_timer(&console_timer, jiffies + blankinterval); | |
3768 | blank_state = blank_normal_wait; | |
3769 | } | |
3770 | } | |
3771 | ||
3772 | /* | |
3773 | * Palettes | |
3774 | */ | |
3775 | ||
3776 | static void set_palette(struct vc_data *vc) | |
3777 | { | |
3778 | WARN_CONSOLE_UNLOCKED(); | |
3779 | ||
3780 | if (vc->vc_mode != KD_GRAPHICS) | |
3781 | vc->vc_sw->con_set_palette(vc, color_table); | |
3782 | } | |
3783 | ||
3784 | static int set_get_cmap(unsigned char __user *arg, int set) | |
3785 | { | |
3786 | int i, j, k; | |
3787 | ||
3788 | WARN_CONSOLE_UNLOCKED(); | |
3789 | ||
3790 | for (i = 0; i < 16; i++) | |
3791 | if (set) { | |
3792 | get_user(default_red[i], arg++); | |
3793 | get_user(default_grn[i], arg++); | |
3794 | get_user(default_blu[i], arg++); | |
3795 | } else { | |
3796 | put_user(default_red[i], arg++); | |
3797 | put_user(default_grn[i], arg++); | |
3798 | put_user(default_blu[i], arg++); | |
3799 | } | |
3800 | if (set) { | |
3801 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
3802 | if (vc_cons_allocated(i)) { | |
3803 | for (j = k = 0; j < 16; j++) { | |
3804 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
3805 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
3806 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
3807 | } | |
3808 | set_palette(vc_cons[i].d); | |
3809 | } | |
3810 | } | |
3811 | return 0; | |
3812 | } | |
3813 | ||
3814 | /* | |
3815 | * Load palette into the DAC registers. arg points to a colour | |
3816 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
3817 | */ | |
3818 | ||
3819 | int con_set_cmap(unsigned char __user *arg) | |
3820 | { | |
3821 | int rc; | |
3822 | ||
3823 | acquire_console_sem(); | |
3824 | rc = set_get_cmap (arg,1); | |
3825 | release_console_sem(); | |
3826 | ||
3827 | return rc; | |
3828 | } | |
3829 | ||
3830 | int con_get_cmap(unsigned char __user *arg) | |
3831 | { | |
3832 | int rc; | |
3833 | ||
3834 | acquire_console_sem(); | |
3835 | rc = set_get_cmap (arg,0); | |
3836 | release_console_sem(); | |
3837 | ||
3838 | return rc; | |
3839 | } | |
3840 | ||
3841 | void reset_palette(struct vc_data *vc) | |
3842 | { | |
3843 | int j, k; | |
3844 | for (j=k=0; j<16; j++) { | |
3845 | vc->vc_palette[k++] = default_red[j]; | |
3846 | vc->vc_palette[k++] = default_grn[j]; | |
3847 | vc->vc_palette[k++] = default_blu[j]; | |
3848 | } | |
3849 | set_palette(vc); | |
3850 | } | |
3851 | ||
3852 | /* | |
3853 | * Font switching | |
3854 | * | |
3855 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
3856 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
3857 | * depending on width) reserved for each character which is kinda wasty, but | |
3858 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
3859 | * is upto the actual low-level console-driver convert data into its favorite | |
3860 | * format (maybe we should add a `fontoffset' field to the `display' | |
3861 | * structure so we won't have to convert the fontdata all the time. | |
3862 | * /Jes | |
3863 | */ | |
3864 | ||
3865 | #define max_font_size 65536 | |
3866 | ||
3867 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
3868 | { | |
3869 | struct console_font font; | |
3870 | int rc = -EINVAL; | |
3871 | int c; | |
3872 | ||
3873 | if (vc->vc_mode != KD_TEXT) | |
3874 | return -EINVAL; | |
3875 | ||
3876 | if (op->data) { | |
3877 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
3878 | if (!font.data) | |
3879 | return -ENOMEM; | |
3880 | } else | |
3881 | font.data = NULL; | |
3882 | ||
3883 | acquire_console_sem(); | |
3884 | if (vc->vc_sw->con_font_get) | |
3885 | rc = vc->vc_sw->con_font_get(vc, &font); | |
3886 | else | |
3887 | rc = -ENOSYS; | |
3888 | release_console_sem(); | |
3889 | ||
3890 | if (rc) | |
3891 | goto out; | |
3892 | ||
3893 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 3894 | |
1da177e4 LT |
3895 | if (op->data && font.charcount > op->charcount) |
3896 | rc = -ENOSPC; | |
3897 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
3898 | if (font.width > op->width || font.height > op->height) | |
3899 | rc = -ENOSPC; | |
3900 | } else { | |
3901 | if (font.width != 8) | |
3902 | rc = -EIO; | |
3903 | else if ((op->height && font.height > op->height) || | |
3904 | font.height > 32) | |
3905 | rc = -ENOSPC; | |
3906 | } | |
3907 | if (rc) | |
3908 | goto out; | |
3909 | ||
3910 | op->height = font.height; | |
3911 | op->width = font.width; | |
3912 | op->charcount = font.charcount; | |
3913 | ||
3914 | if (op->data && copy_to_user(op->data, font.data, c)) | |
3915 | rc = -EFAULT; | |
3916 | ||
3917 | out: | |
3918 | kfree(font.data); | |
3919 | return rc; | |
3920 | } | |
3921 | ||
3922 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
3923 | { | |
3924 | struct console_font font; | |
3925 | int rc = -EINVAL; | |
3926 | int size; | |
3927 | ||
3928 | if (vc->vc_mode != KD_TEXT) | |
3929 | return -EINVAL; | |
3930 | if (!op->data) | |
3931 | return -EINVAL; | |
3932 | if (op->charcount > 512) | |
3933 | return -EINVAL; | |
3934 | if (!op->height) { /* Need to guess font height [compat] */ | |
3935 | int h, i; | |
3936 | u8 __user *charmap = op->data; | |
3937 | u8 tmp; | |
3938 | ||
3939 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, | |
3940 | so that we can get rid of this soon */ | |
3941 | if (!(op->flags & KD_FONT_FLAG_OLD)) | |
3942 | return -EINVAL; | |
3943 | for (h = 32; h > 0; h--) | |
3944 | for (i = 0; i < op->charcount; i++) { | |
3945 | if (get_user(tmp, &charmap[32*i+h-1])) | |
3946 | return -EFAULT; | |
3947 | if (tmp) | |
3948 | goto nonzero; | |
3949 | } | |
3950 | return -EINVAL; | |
3951 | nonzero: | |
3952 | op->height = h; | |
3953 | } | |
3954 | if (op->width <= 0 || op->width > 32 || op->height > 32) | |
3955 | return -EINVAL; | |
3956 | size = (op->width+7)/8 * 32 * op->charcount; | |
3957 | if (size > max_font_size) | |
3958 | return -ENOSPC; | |
3959 | font.charcount = op->charcount; | |
3960 | font.height = op->height; | |
3961 | font.width = op->width; | |
3962 | font.data = kmalloc(size, GFP_KERNEL); | |
3963 | if (!font.data) | |
3964 | return -ENOMEM; | |
3965 | if (copy_from_user(font.data, op->data, size)) { | |
3966 | kfree(font.data); | |
3967 | return -EFAULT; | |
3968 | } | |
3969 | acquire_console_sem(); | |
3970 | if (vc->vc_sw->con_font_set) | |
3971 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); | |
3972 | else | |
3973 | rc = -ENOSYS; | |
3974 | release_console_sem(); | |
3975 | kfree(font.data); | |
3976 | return rc; | |
3977 | } | |
3978 | ||
3979 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
3980 | { | |
3981 | struct console_font font = {.width = op->width, .height = op->height}; | |
3982 | char name[MAX_FONT_NAME]; | |
3983 | char *s = name; | |
3984 | int rc; | |
3985 | ||
3986 | if (vc->vc_mode != KD_TEXT) | |
3987 | return -EINVAL; | |
3988 | ||
3989 | if (!op->data) | |
3990 | s = NULL; | |
3991 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
3992 | return -EFAULT; | |
3993 | else | |
3994 | name[MAX_FONT_NAME - 1] = 0; | |
3995 | ||
3996 | acquire_console_sem(); | |
3997 | if (vc->vc_sw->con_font_default) | |
3998 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
3999 | else | |
4000 | rc = -ENOSYS; | |
4001 | release_console_sem(); | |
4002 | if (!rc) { | |
4003 | op->width = font.width; | |
4004 | op->height = font.height; | |
4005 | } | |
4006 | return rc; | |
4007 | } | |
4008 | ||
4009 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4010 | { | |
4011 | int con = op->height; | |
4012 | int rc; | |
4013 | ||
4014 | if (vc->vc_mode != KD_TEXT) | |
4015 | return -EINVAL; | |
4016 | ||
4017 | acquire_console_sem(); | |
4018 | if (!vc->vc_sw->con_font_copy) | |
4019 | rc = -ENOSYS; | |
4020 | else if (con < 0 || !vc_cons_allocated(con)) | |
4021 | rc = -ENOTTY; | |
4022 | else if (con == vc->vc_num) /* nothing to do */ | |
4023 | rc = 0; | |
4024 | else | |
4025 | rc = vc->vc_sw->con_font_copy(vc, con); | |
4026 | release_console_sem(); | |
4027 | return rc; | |
4028 | } | |
4029 | ||
4030 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4031 | { | |
4032 | switch (op->op) { | |
4033 | case KD_FONT_OP_SET: | |
4034 | return con_font_set(vc, op); | |
4035 | case KD_FONT_OP_GET: | |
4036 | return con_font_get(vc, op); | |
4037 | case KD_FONT_OP_SET_DEFAULT: | |
4038 | return con_font_default(vc, op); | |
4039 | case KD_FONT_OP_COPY: | |
4040 | return con_font_copy(vc, op); | |
4041 | } | |
4042 | return -ENOSYS; | |
4043 | } | |
4044 | ||
4045 | /* | |
4046 | * Interface exported to selection and vcs. | |
4047 | */ | |
4048 | ||
4049 | /* used by selection */ | |
4050 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4051 | { | |
4052 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4053 | u16 c = w & 0xff; | |
4054 | ||
4055 | if (w & vc->vc_hi_font_mask) | |
4056 | c |= 0x100; | |
4057 | return c; | |
4058 | } | |
f7511d5f | 4059 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 LT |
4060 | |
4061 | /* used by vcs - note the word offset */ | |
4062 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4063 | { | |
4064 | return screenpos(vc, 2 * w_offset, viewed); | |
4065 | } | |
4066 | ||
4067 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4068 | { | |
4069 | p[0] = vc->vc_x; | |
4070 | p[1] = vc->vc_y; | |
4071 | } | |
4072 | ||
4073 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4074 | { | |
9477e260 | 4075 | hide_cursor(vc); |
1da177e4 LT |
4076 | gotoxy(vc, p[0], p[1]); |
4077 | set_cursor(vc); | |
4078 | } | |
4079 | ||
4080 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4081 | { | |
4082 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4083 | return softcursor_original; | |
4084 | return scr_readw(org); | |
4085 | } | |
4086 | ||
4087 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4088 | { | |
4089 | scr_writew(val, org); | |
4090 | if ((unsigned long)org == vc->vc_pos) { | |
4091 | softcursor_original = -1; | |
4092 | add_softcursor(vc); | |
4093 | } | |
4094 | } | |
4095 | ||
4096 | /* | |
4097 | * Visible symbols for modules | |
4098 | */ | |
4099 | ||
4100 | EXPORT_SYMBOL(color_table); | |
4101 | EXPORT_SYMBOL(default_red); | |
4102 | EXPORT_SYMBOL(default_grn); | |
4103 | EXPORT_SYMBOL(default_blu); | |
4104 | EXPORT_SYMBOL(update_region); | |
4105 | EXPORT_SYMBOL(redraw_screen); | |
4106 | EXPORT_SYMBOL(vc_resize); | |
4107 | EXPORT_SYMBOL(fg_console); | |
4108 | EXPORT_SYMBOL(console_blank_hook); | |
4109 | EXPORT_SYMBOL(console_blanked); | |
4110 | EXPORT_SYMBOL(vc_cons); | |
4111 | #ifndef VT_SINGLE_DRIVER | |
4112 | EXPORT_SYMBOL(take_over_console); | |
4113 | EXPORT_SYMBOL(give_up_console); | |
4114 | #endif |