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