Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/vt.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 79654 byte(s)
Tag kernel26-2.6.12-alx-r9
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 |
66 | */ |
67 | |
68 | #include <linux/module.h> |
69 | #include <linux/types.h> |
70 | #include <linux/sched.h> |
71 | #include <linux/tty.h> |
72 | #include <linux/tty_flip.h> |
73 | #include <linux/kernel.h> |
74 | #include <linux/string.h> |
75 | #include <linux/errno.h> |
76 | #include <linux/kd.h> |
77 | #include <linux/slab.h> |
78 | #include <linux/major.h> |
79 | #include <linux/mm.h> |
80 | #include <linux/console.h> |
81 | #include <linux/init.h> |
82 | #include <linux/devfs_fs_kernel.h> |
83 | #include <linux/vt_kern.h> |
84 | #include <linux/selection.h> |
85 | #include <linux/tiocl.h> |
86 | #include <linux/kbd_kern.h> |
87 | #include <linux/consolemap.h> |
88 | #include <linux/timer.h> |
89 | #include <linux/interrupt.h> |
90 | #include <linux/config.h> |
91 | #include <linux/workqueue.h> |
92 | #include <linux/bootmem.h> |
93 | #include <linux/pm.h> |
94 | #include <linux/font.h> |
95 | #include <linux/bitops.h> |
96 | |
97 | #include <asm/io.h> |
98 | #include <asm/system.h> |
99 | #include <asm/uaccess.h> |
100 | |
101 | |
102 | const struct consw *conswitchp; |
103 | |
104 | /* A bitmap for codes <32. A bit of 1 indicates that the code |
105 | * corresponding to that bit number invokes some special action |
106 | * (such as cursor movement) and should not be displayed as a |
107 | * glyph unless the disp_ctrl mode is explicitly enabled. |
108 | */ |
109 | #define CTRL_ACTION 0x0d00ff81 |
110 | #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ |
111 | |
112 | /* |
113 | * Here is the default bell parameters: 750HZ, 1/8th of a second |
114 | */ |
115 | #define DEFAULT_BELL_PITCH 750 |
116 | #define DEFAULT_BELL_DURATION (HZ/8) |
117 | |
118 | extern void vcs_make_devfs(struct tty_struct *tty); |
119 | extern void vcs_remove_devfs(struct tty_struct *tty); |
120 | |
121 | extern void console_map_init(void); |
122 | #ifdef CONFIG_PROM_CONSOLE |
123 | extern void prom_con_init(void); |
124 | #endif |
125 | #ifdef CONFIG_MDA_CONSOLE |
126 | extern int mda_console_init(void); |
127 | #endif |
128 | |
129 | struct vc vc_cons [MAX_NR_CONSOLES]; |
130 | |
131 | #ifndef VT_SINGLE_DRIVER |
132 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; |
133 | #endif |
134 | |
135 | static int con_open(struct tty_struct *, struct file *); |
136 | static void vc_init(struct vc_data *vc, unsigned int rows, |
137 | unsigned int cols, int do_clear); |
138 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); |
139 | static void save_cur(struct vc_data *vc); |
140 | static void reset_terminal(struct vc_data *vc, int do_clear); |
141 | static void con_flush_chars(struct tty_struct *tty); |
142 | static void set_vesa_blanking(char __user *p); |
143 | static void set_cursor(struct vc_data *vc); |
144 | static void hide_cursor(struct vc_data *vc); |
145 | static void console_callback(void *ignored); |
146 | static void blank_screen_t(unsigned long dummy); |
147 | static void set_palette(struct vc_data *vc); |
148 | |
149 | static int printable; /* Is console ready for printing? */ |
150 | |
151 | /* |
152 | * ignore_poke: don't unblank the screen when things are typed. This is |
153 | * mainly for the privacy of braille terminal users. |
154 | */ |
155 | static int ignore_poke; |
156 | |
157 | int do_poke_blanked_console; |
158 | int console_blanked; |
159 | |
160 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ |
161 | static int blankinterval = 10*60*HZ; |
162 | static int vesa_off_interval; |
163 | |
164 | static DECLARE_WORK(console_work, console_callback, NULL); |
165 | |
166 | /* |
167 | * fg_console is the current virtual console, |
168 | * last_console is the last used one, |
169 | * want_console is the console we want to switch to, |
170 | * kmsg_redirect is the console for kernel messages, |
171 | */ |
172 | int fg_console; |
173 | int last_console; |
174 | int want_console = -1; |
175 | int kmsg_redirect; |
176 | |
177 | /* |
178 | * For each existing display, we have a pointer to console currently visible |
179 | * on that display, allowing consoles other than fg_console to be refreshed |
180 | * appropriately. Unless the low-level driver supplies its own display_fg |
181 | * variable, we use this one for the "master display". |
182 | */ |
183 | static struct vc_data *master_display_fg; |
184 | |
185 | /* |
186 | * Unfortunately, we need to delay tty echo when we're currently writing to the |
187 | * console since the code is (and always was) not re-entrant, so we schedule |
188 | * all flip requests to process context with schedule-task() and run it from |
189 | * console_callback(). |
190 | */ |
191 | |
192 | /* |
193 | * For the same reason, we defer scrollback to the console callback. |
194 | */ |
195 | static int scrollback_delta; |
196 | |
197 | /* |
198 | * Hook so that the power management routines can (un)blank |
199 | * the console on our behalf. |
200 | */ |
201 | int (*console_blank_hook)(int); |
202 | |
203 | static struct timer_list console_timer; |
204 | static int blank_state; |
205 | static int blank_timer_expired; |
206 | enum { |
207 | blank_off = 0, |
208 | blank_normal_wait, |
209 | blank_vesa_wait, |
210 | }; |
211 | |
212 | /* |
213 | * Low-Level Functions |
214 | */ |
215 | |
216 | #define IS_FG(vc) ((vc)->vc_num == fg_console) |
217 | |
218 | #ifdef VT_BUF_VRAM_ONLY |
219 | #define DO_UPDATE(vc) 0 |
220 | #else |
221 | #define DO_UPDATE(vc) CON_IS_VISIBLE(vc) |
222 | #endif |
223 | |
224 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) |
225 | { |
226 | unsigned short *p; |
227 | |
228 | if (!viewed) |
229 | p = (unsigned short *)(vc->vc_origin + offset); |
230 | else if (!vc->vc_sw->con_screen_pos) |
231 | p = (unsigned short *)(vc->vc_visible_origin + offset); |
232 | else |
233 | p = vc->vc_sw->con_screen_pos(vc, offset); |
234 | return p; |
235 | } |
236 | |
237 | static inline void scrolldelta(int lines) |
238 | { |
239 | scrollback_delta += lines; |
240 | schedule_console_callback(); |
241 | } |
242 | |
243 | void schedule_console_callback(void) |
244 | { |
245 | schedule_work(&console_work); |
246 | } |
247 | |
248 | static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) |
249 | { |
250 | unsigned short *d, *s; |
251 | |
252 | if (t+nr >= b) |
253 | nr = b - t - 1; |
254 | if (b > vc->vc_rows || t >= b || nr < 1) |
255 | return; |
256 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) |
257 | return; |
258 | d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); |
259 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); |
260 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); |
261 | scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, |
262 | vc->vc_size_row * nr); |
263 | } |
264 | |
265 | static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) |
266 | { |
267 | unsigned short *s; |
268 | unsigned int step; |
269 | |
270 | if (t+nr >= b) |
271 | nr = b - t - 1; |
272 | if (b > vc->vc_rows || t >= b || nr < 1) |
273 | return; |
274 | if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) |
275 | return; |
276 | s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); |
277 | step = vc->vc_cols * nr; |
278 | scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); |
279 | scr_memsetw(s, vc->vc_video_erase_char, 2 * step); |
280 | } |
281 | |
282 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) |
283 | { |
284 | #ifndef VT_BUF_VRAM_ONLY |
285 | unsigned int xx, yy, offset; |
286 | u16 *p; |
287 | |
288 | p = (u16 *) start; |
289 | if (!vc->vc_sw->con_getxy) { |
290 | offset = (start - vc->vc_origin) / 2; |
291 | xx = offset % vc->vc_cols; |
292 | yy = offset / vc->vc_cols; |
293 | } else { |
294 | int nxx, nyy; |
295 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); |
296 | xx = nxx; yy = nyy; |
297 | } |
298 | for(;;) { |
299 | u16 attrib = scr_readw(p) & 0xff00; |
300 | int startx = xx; |
301 | u16 *q = p; |
302 | while (xx < vc->vc_cols && count) { |
303 | if (attrib != (scr_readw(p) & 0xff00)) { |
304 | if (p > q) |
305 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); |
306 | startx = xx; |
307 | q = p; |
308 | attrib = scr_readw(p) & 0xff00; |
309 | } |
310 | p++; |
311 | xx++; |
312 | count--; |
313 | } |
314 | if (p > q) |
315 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); |
316 | if (!count) |
317 | break; |
318 | xx = 0; |
319 | yy++; |
320 | if (vc->vc_sw->con_getxy) { |
321 | p = (u16 *)start; |
322 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); |
323 | } |
324 | } |
325 | #endif |
326 | } |
327 | |
328 | void update_region(struct vc_data *vc, unsigned long start, int count) |
329 | { |
330 | WARN_CONSOLE_UNLOCKED(); |
331 | |
332 | if (DO_UPDATE(vc)) { |
333 | hide_cursor(vc); |
334 | do_update_region(vc, start, count); |
335 | set_cursor(vc); |
336 | } |
337 | } |
338 | |
339 | /* Structure of attributes is hardware-dependent */ |
340 | |
341 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, u8 _underline, u8 _reverse) |
342 | { |
343 | if (vc->vc_sw->con_build_attr) |
344 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, _blink, _underline, _reverse); |
345 | |
346 | #ifndef VT_BUF_VRAM_ONLY |
347 | /* |
348 | * ++roman: I completely changed the attribute format for monochrome |
349 | * mode (!can_do_color). The formerly used MDA (monochrome display |
350 | * adapter) format didn't allow the combination of certain effects. |
351 | * Now the attribute is just a bit vector: |
352 | * Bit 0..1: intensity (0..2) |
353 | * Bit 2 : underline |
354 | * Bit 3 : reverse |
355 | * Bit 7 : blink |
356 | */ |
357 | { |
358 | u8 a = vc->vc_color; |
359 | if (!vc->vc_can_do_color) |
360 | return _intensity | |
361 | (_underline ? 4 : 0) | |
362 | (_reverse ? 8 : 0) | |
363 | (_blink ? 0x80 : 0); |
364 | if (_underline) |
365 | a = (a & 0xf0) | vc->vc_ulcolor; |
366 | else if (_intensity == 0) |
367 | a = (a & 0xf0) | vc->vc_ulcolor; |
368 | if (_reverse) |
369 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); |
370 | if (_blink) |
371 | a ^= 0x80; |
372 | if (_intensity == 2) |
373 | a ^= 0x08; |
374 | if (vc->vc_hi_font_mask == 0x100) |
375 | a <<= 1; |
376 | return a; |
377 | } |
378 | #else |
379 | return 0; |
380 | #endif |
381 | } |
382 | |
383 | static void update_attr(struct vc_data *vc) |
384 | { |
385 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, vc->vc_blink, vc->vc_underline, vc->vc_reverse ^ vc->vc_decscnm); |
386 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm) << 8) | ' '; |
387 | } |
388 | |
389 | /* Note: inverting the screen twice should revert to the original state */ |
390 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) |
391 | { |
392 | unsigned short *p; |
393 | |
394 | WARN_CONSOLE_UNLOCKED(); |
395 | |
396 | count /= 2; |
397 | p = screenpos(vc, offset, viewed); |
398 | if (vc->vc_sw->con_invert_region) |
399 | vc->vc_sw->con_invert_region(vc, p, count); |
400 | #ifndef VT_BUF_VRAM_ONLY |
401 | else { |
402 | u16 *q = p; |
403 | int cnt = count; |
404 | u16 a; |
405 | |
406 | if (!vc->vc_can_do_color) { |
407 | while (cnt--) { |
408 | a = scr_readw(q); |
409 | a ^= 0x0800; |
410 | scr_writew(a, q); |
411 | q++; |
412 | } |
413 | } else if (vc->vc_hi_font_mask == 0x100) { |
414 | while (cnt--) { |
415 | a = scr_readw(q); |
416 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); |
417 | scr_writew(a, q); |
418 | q++; |
419 | } |
420 | } else { |
421 | while (cnt--) { |
422 | a = scr_readw(q); |
423 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); |
424 | scr_writew(a, q); |
425 | q++; |
426 | } |
427 | } |
428 | } |
429 | #endif |
430 | if (DO_UPDATE(vc)) |
431 | do_update_region(vc, (unsigned long) p, count); |
432 | } |
433 | |
434 | /* used by selection: complement pointer position */ |
435 | void complement_pos(struct vc_data *vc, int offset) |
436 | { |
437 | static unsigned short *p; |
438 | static unsigned short old; |
439 | static unsigned short oldx, oldy; |
440 | |
441 | WARN_CONSOLE_UNLOCKED(); |
442 | |
443 | if (p) { |
444 | scr_writew(old, p); |
445 | if (DO_UPDATE(vc)) |
446 | vc->vc_sw->con_putc(vc, old, oldy, oldx); |
447 | } |
448 | if (offset == -1) |
449 | p = NULL; |
450 | else { |
451 | unsigned short new; |
452 | p = screenpos(vc, offset, 1); |
453 | old = scr_readw(p); |
454 | new = old ^ vc->vc_complement_mask; |
455 | scr_writew(new, p); |
456 | if (DO_UPDATE(vc)) { |
457 | oldx = (offset >> 1) % vc->vc_cols; |
458 | oldy = (offset >> 1) / vc->vc_cols; |
459 | vc->vc_sw->con_putc(vc, new, oldy, oldx); |
460 | } |
461 | } |
462 | } |
463 | |
464 | static void insert_char(struct vc_data *vc, unsigned int nr) |
465 | { |
466 | unsigned short *p, *q = (unsigned short *)vc->vc_pos; |
467 | |
468 | p = q + vc->vc_cols - nr - vc->vc_x; |
469 | while (--p >= q) |
470 | scr_writew(scr_readw(p), p + nr); |
471 | scr_memsetw(q, vc->vc_video_erase_char, nr * 2); |
472 | vc->vc_need_wrap = 0; |
473 | if (DO_UPDATE(vc)) { |
474 | unsigned short oldattr = vc->vc_attr; |
475 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, |
476 | vc->vc_cols - vc->vc_x - nr); |
477 | vc->vc_attr = vc->vc_video_erase_char >> 8; |
478 | while (nr--) |
479 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); |
480 | vc->vc_attr = oldattr; |
481 | } |
482 | } |
483 | |
484 | static void delete_char(struct vc_data *vc, unsigned int nr) |
485 | { |
486 | unsigned int i = vc->vc_x; |
487 | unsigned short *p = (unsigned short *)vc->vc_pos; |
488 | |
489 | while (++i <= vc->vc_cols - nr) { |
490 | scr_writew(scr_readw(p+nr), p); |
491 | p++; |
492 | } |
493 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
494 | vc->vc_need_wrap = 0; |
495 | if (DO_UPDATE(vc)) { |
496 | unsigned short oldattr = vc->vc_attr; |
497 | vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, |
498 | vc->vc_cols - vc->vc_x - nr); |
499 | vc->vc_attr = vc->vc_video_erase_char >> 8; |
500 | while (nr--) |
501 | vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, |
502 | vc->vc_cols - 1 - nr); |
503 | vc->vc_attr = oldattr; |
504 | } |
505 | } |
506 | |
507 | static int softcursor_original; |
508 | |
509 | static void add_softcursor(struct vc_data *vc) |
510 | { |
511 | int i = scr_readw((u16 *) vc->vc_pos); |
512 | u32 type = vc->vc_cursor_type; |
513 | |
514 | if (! (type & 0x10)) return; |
515 | if (softcursor_original != -1) return; |
516 | softcursor_original = i; |
517 | i |= ((type >> 8) & 0xff00 ); |
518 | i ^= ((type) & 0xff00 ); |
519 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; |
520 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; |
521 | scr_writew(i, (u16 *) vc->vc_pos); |
522 | if (DO_UPDATE(vc)) |
523 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); |
524 | } |
525 | |
526 | static void hide_softcursor(struct vc_data *vc) |
527 | { |
528 | if (softcursor_original != -1) { |
529 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); |
530 | if (DO_UPDATE(vc)) |
531 | vc->vc_sw->con_putc(vc, softcursor_original, |
532 | vc->vc_y, vc->vc_x); |
533 | softcursor_original = -1; |
534 | } |
535 | } |
536 | |
537 | static void hide_cursor(struct vc_data *vc) |
538 | { |
539 | if (vc == sel_cons) |
540 | clear_selection(); |
541 | vc->vc_sw->con_cursor(vc, CM_ERASE); |
542 | hide_softcursor(vc); |
543 | } |
544 | |
545 | static void set_cursor(struct vc_data *vc) |
546 | { |
547 | if (!IS_FG(vc) || console_blanked || |
548 | vc->vc_mode == KD_GRAPHICS) |
549 | return; |
550 | if (vc->vc_deccm) { |
551 | if (vc == sel_cons) |
552 | clear_selection(); |
553 | add_softcursor(vc); |
554 | if ((vc->vc_cursor_type & 0x0f) != 1) |
555 | vc->vc_sw->con_cursor(vc, CM_DRAW); |
556 | } else |
557 | hide_cursor(vc); |
558 | } |
559 | |
560 | static void set_origin(struct vc_data *vc) |
561 | { |
562 | WARN_CONSOLE_UNLOCKED(); |
563 | |
564 | if (!CON_IS_VISIBLE(vc) || |
565 | !vc->vc_sw->con_set_origin || |
566 | !vc->vc_sw->con_set_origin(vc)) |
567 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
568 | vc->vc_visible_origin = vc->vc_origin; |
569 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; |
570 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; |
571 | } |
572 | |
573 | static inline void save_screen(struct vc_data *vc) |
574 | { |
575 | WARN_CONSOLE_UNLOCKED(); |
576 | |
577 | if (vc->vc_sw->con_save_screen) |
578 | vc->vc_sw->con_save_screen(vc); |
579 | } |
580 | |
581 | /* |
582 | * Redrawing of screen |
583 | */ |
584 | |
585 | static void clear_buffer_attributes(struct vc_data *vc) |
586 | { |
587 | unsigned short *p = (unsigned short *)vc->vc_origin; |
588 | int count = vc->vc_screenbuf_size / 2; |
589 | int mask = vc->vc_hi_font_mask | 0xff; |
590 | |
591 | for (; count > 0; count--, p++) { |
592 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); |
593 | } |
594 | } |
595 | |
596 | void redraw_screen(struct vc_data *vc, int is_switch) |
597 | { |
598 | int redraw = 0; |
599 | |
600 | WARN_CONSOLE_UNLOCKED(); |
601 | |
602 | if (!vc) { |
603 | /* strange ... */ |
604 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ |
605 | return; |
606 | } |
607 | |
608 | if (is_switch) { |
609 | struct vc_data *old_vc = vc_cons[fg_console].d; |
610 | if (old_vc == vc) |
611 | return; |
612 | if (!CON_IS_VISIBLE(vc)) |
613 | redraw = 1; |
614 | *vc->vc_display_fg = vc; |
615 | fg_console = vc->vc_num; |
616 | hide_cursor(old_vc); |
617 | if (!CON_IS_VISIBLE(old_vc)) { |
618 | save_screen(old_vc); |
619 | set_origin(old_vc); |
620 | } |
621 | } else { |
622 | hide_cursor(vc); |
623 | redraw = 1; |
624 | } |
625 | |
626 | if (redraw) { |
627 | int update; |
628 | int old_was_color = vc->vc_can_do_color; |
629 | |
630 | set_origin(vc); |
631 | update = vc->vc_sw->con_switch(vc); |
632 | set_palette(vc); |
633 | /* |
634 | * If console changed from mono<->color, the best we can do |
635 | * is to clear the buffer attributes. As it currently stands, |
636 | * rebuilding new attributes from the old buffer is not doable |
637 | * without overly complex code. |
638 | */ |
639 | if (old_was_color != vc->vc_can_do_color) { |
640 | update_attr(vc); |
641 | clear_buffer_attributes(vc); |
642 | } |
643 | if (update && vc->vc_mode != KD_GRAPHICS) |
644 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
645 | } |
646 | set_cursor(vc); |
647 | if (is_switch) { |
648 | set_leds(); |
649 | compute_shiftstate(); |
650 | } |
651 | } |
652 | |
653 | /* |
654 | * Allocation, freeing and resizing of VTs. |
655 | */ |
656 | |
657 | int vc_cons_allocated(unsigned int i) |
658 | { |
659 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); |
660 | } |
661 | |
662 | static void visual_init(struct vc_data *vc, int num, int init) |
663 | { |
664 | /* ++Geert: vc->vc_sw->con_init determines console size */ |
665 | if (vc->vc_sw) |
666 | module_put(vc->vc_sw->owner); |
667 | vc->vc_sw = conswitchp; |
668 | #ifndef VT_SINGLE_DRIVER |
669 | if (con_driver_map[num]) |
670 | vc->vc_sw = con_driver_map[num]; |
671 | #endif |
672 | __module_get(vc->vc_sw->owner); |
673 | vc->vc_num = num; |
674 | vc->vc_display_fg = &master_display_fg; |
675 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
676 | vc->vc_uni_pagedir = 0; |
677 | vc->vc_hi_font_mask = 0; |
678 | vc->vc_complement_mask = 0; |
679 | vc->vc_can_do_color = 0; |
680 | vc->vc_sw->con_init(vc, init); |
681 | if (!vc->vc_complement_mask) |
682 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; |
683 | vc->vc_s_complement_mask = vc->vc_complement_mask; |
684 | vc->vc_size_row = vc->vc_cols << 1; |
685 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; |
686 | } |
687 | |
688 | int vc_allocate(unsigned int currcons) /* return 0 on success */ |
689 | { |
690 | WARN_CONSOLE_UNLOCKED(); |
691 | |
692 | if (currcons >= MAX_NR_CONSOLES) |
693 | return -ENXIO; |
694 | if (!vc_cons[currcons].d) { |
695 | struct vc_data *vc; |
696 | |
697 | /* prevent users from taking too much memory */ |
698 | if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) |
699 | return -EPERM; |
700 | |
701 | /* due to the granularity of kmalloc, we waste some memory here */ |
702 | /* the alloc is done in two steps, to optimize the common situation |
703 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ |
704 | /* although the numbers above are not valid since long ago, the |
705 | point is still up-to-date and the comment still has its value |
706 | even if only as a historical artifact. --mj, July 1998 */ |
707 | vc = kmalloc(sizeof(struct vc_data), GFP_KERNEL); |
708 | if (!vc) |
709 | return -ENOMEM; |
710 | memset(vc, 0, sizeof(*vc)); |
711 | vc_cons[currcons].d = vc; |
712 | visual_init(vc, currcons, 1); |
713 | if (!*vc->vc_uni_pagedir_loc) |
714 | con_set_default_unimap(vc); |
715 | vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
716 | if (!vc->vc_screenbuf) { |
717 | kfree(vc); |
718 | vc_cons[currcons].d = NULL; |
719 | return -ENOMEM; |
720 | } |
721 | vc->vc_kmalloced = 1; |
722 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); |
723 | } |
724 | return 0; |
725 | } |
726 | |
727 | static inline int resize_screen(struct vc_data *vc, int width, int height) |
728 | { |
729 | /* Resizes the resolution of the display adapater */ |
730 | int err = 0; |
731 | |
732 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) |
733 | err = vc->vc_sw->con_resize(vc, width, height); |
734 | return err; |
735 | } |
736 | |
737 | /* |
738 | * Change # of rows and columns (0 means unchanged/the size of fg_console) |
739 | * [this is to be used together with some user program |
740 | * like resize that changes the hardware videomode] |
741 | */ |
742 | #define VC_RESIZE_MAXCOL (32767) |
743 | #define VC_RESIZE_MAXROW (32767) |
744 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines) |
745 | { |
746 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; |
747 | unsigned int old_cols, old_rows, old_row_size, old_screen_size; |
748 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
749 | unsigned short *newscreen; |
750 | |
751 | WARN_CONSOLE_UNLOCKED(); |
752 | |
753 | if (!vc) |
754 | return -ENXIO; |
755 | |
756 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
757 | return -EINVAL; |
758 | |
759 | new_cols = (cols ? cols : vc->vc_cols); |
760 | new_rows = (lines ? lines : vc->vc_rows); |
761 | new_row_size = new_cols << 1; |
762 | new_screen_size = new_row_size * new_rows; |
763 | |
764 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) |
765 | return 0; |
766 | |
767 | newscreen = (unsigned short *) kmalloc(new_screen_size, GFP_USER); |
768 | if (!newscreen) |
769 | return -ENOMEM; |
770 | |
771 | old_rows = vc->vc_rows; |
772 | old_cols = vc->vc_cols; |
773 | old_row_size = vc->vc_size_row; |
774 | old_screen_size = vc->vc_screenbuf_size; |
775 | |
776 | err = resize_screen(vc, new_cols, new_rows); |
777 | if (err) { |
778 | kfree(newscreen); |
779 | return err; |
780 | } |
781 | |
782 | vc->vc_rows = new_rows; |
783 | vc->vc_cols = new_cols; |
784 | vc->vc_size_row = new_row_size; |
785 | vc->vc_screenbuf_size = new_screen_size; |
786 | |
787 | rlth = min(old_row_size, new_row_size); |
788 | rrem = new_row_size - rlth; |
789 | old_origin = vc->vc_origin; |
790 | new_origin = (long) newscreen; |
791 | new_scr_end = new_origin + new_screen_size; |
792 | if (new_rows < old_rows) |
793 | old_origin += (old_rows - new_rows) * old_row_size; |
794 | |
795 | update_attr(vc); |
796 | |
797 | while (old_origin < vc->vc_scr_end) { |
798 | scr_memcpyw((unsigned short *) new_origin, (unsigned short *) old_origin, rlth); |
799 | if (rrem) |
800 | scr_memsetw((void *)(new_origin + rlth), vc->vc_video_erase_char, rrem); |
801 | old_origin += old_row_size; |
802 | new_origin += new_row_size; |
803 | } |
804 | if (new_scr_end > new_origin) |
805 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, new_scr_end - new_origin); |
806 | if (vc->vc_kmalloced) |
807 | kfree(vc->vc_screenbuf); |
808 | vc->vc_screenbuf = newscreen; |
809 | vc->vc_kmalloced = 1; |
810 | vc->vc_screenbuf_size = new_screen_size; |
811 | set_origin(vc); |
812 | |
813 | /* do part of a reset_terminal() */ |
814 | vc->vc_top = 0; |
815 | vc->vc_bottom = vc->vc_rows; |
816 | gotoxy(vc, vc->vc_x, vc->vc_y); |
817 | save_cur(vc); |
818 | |
819 | if (vc->vc_tty) { |
820 | struct winsize ws, *cws = &vc->vc_tty->winsize; |
821 | |
822 | memset(&ws, 0, sizeof(ws)); |
823 | ws.ws_row = vc->vc_rows; |
824 | ws.ws_col = vc->vc_cols; |
825 | ws.ws_ypixel = vc->vc_scan_lines; |
826 | if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) && |
827 | vc->vc_tty->pgrp > 0) |
828 | kill_pg(vc->vc_tty->pgrp, SIGWINCH, 1); |
829 | *cws = ws; |
830 | } |
831 | |
832 | if (CON_IS_VISIBLE(vc)) |
833 | update_screen(vc); |
834 | return err; |
835 | } |
836 | |
837 | |
838 | void vc_disallocate(unsigned int currcons) |
839 | { |
840 | WARN_CONSOLE_UNLOCKED(); |
841 | |
842 | if (vc_cons_allocated(currcons)) { |
843 | struct vc_data *vc = vc_cons[currcons].d; |
844 | vc->vc_sw->con_deinit(vc); |
845 | if (vc->vc_kmalloced) |
846 | kfree(vc->vc_screenbuf); |
847 | if (currcons >= MIN_NR_CONSOLES) |
848 | kfree(vc); |
849 | vc_cons[currcons].d = NULL; |
850 | } |
851 | } |
852 | |
853 | /* |
854 | * VT102 emulator |
855 | */ |
856 | |
857 | #define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
858 | #define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
859 | #define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) |
860 | |
861 | #define decarm VC_REPEAT |
862 | #define decckm VC_CKMODE |
863 | #define kbdapplic VC_APPLIC |
864 | #define lnm VC_CRLF |
865 | |
866 | /* |
867 | * this is what the terminal answers to a ESC-Z or csi0c query. |
868 | */ |
869 | #define VT100ID "\033[?1;2c" |
870 | #define VT102ID "\033[?6c" |
871 | |
872 | unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, |
873 | 8,12,10,14, 9,13,11,15 }; |
874 | |
875 | /* the default colour table, for VGA+ colour systems */ |
876 | int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, |
877 | 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; |
878 | int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, |
879 | 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; |
880 | int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, |
881 | 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; |
882 | |
883 | /* |
884 | * gotoxy() must verify all boundaries, because the arguments |
885 | * might also be negative. If the given position is out of |
886 | * bounds, the cursor is placed at the nearest margin. |
887 | */ |
888 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) |
889 | { |
890 | int min_y, max_y; |
891 | |
892 | if (new_x < 0) |
893 | vc->vc_x = 0; |
894 | else { |
895 | if (new_x >= vc->vc_cols) |
896 | vc->vc_x = vc->vc_cols - 1; |
897 | else |
898 | vc->vc_x = new_x; |
899 | } |
900 | |
901 | if (vc->vc_decom) { |
902 | min_y = vc->vc_top; |
903 | max_y = vc->vc_bottom; |
904 | } else { |
905 | min_y = 0; |
906 | max_y = vc->vc_rows; |
907 | } |
908 | if (new_y < min_y) |
909 | vc->vc_y = min_y; |
910 | else if (new_y >= max_y) |
911 | vc->vc_y = max_y - 1; |
912 | else |
913 | vc->vc_y = new_y; |
914 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); |
915 | vc->vc_need_wrap = 0; |
916 | } |
917 | |
918 | /* for absolute user moves, when decom is set */ |
919 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) |
920 | { |
921 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); |
922 | } |
923 | |
924 | void scrollback(struct vc_data *vc, int lines) |
925 | { |
926 | if (!lines) |
927 | lines = vc->vc_rows / 2; |
928 | scrolldelta(-lines); |
929 | } |
930 | |
931 | void scrollfront(struct vc_data *vc, int lines) |
932 | { |
933 | if (!lines) |
934 | lines = vc->vc_rows / 2; |
935 | scrolldelta(lines); |
936 | } |
937 | |
938 | static void lf(struct vc_data *vc) |
939 | { |
940 | /* don't scroll if above bottom of scrolling region, or |
941 | * if below scrolling region |
942 | */ |
943 | if (vc->vc_y + 1 == vc->vc_bottom) |
944 | scrup(vc, vc->vc_top, vc->vc_bottom, 1); |
945 | else if (vc->vc_y < vc->vc_rows - 1) { |
946 | vc->vc_y++; |
947 | vc->vc_pos += vc->vc_size_row; |
948 | } |
949 | vc->vc_need_wrap = 0; |
950 | } |
951 | |
952 | static void ri(struct vc_data *vc) |
953 | { |
954 | /* don't scroll if below top of scrolling region, or |
955 | * if above scrolling region |
956 | */ |
957 | if (vc->vc_y == vc->vc_top) |
958 | scrdown(vc, vc->vc_top, vc->vc_bottom, 1); |
959 | else if (vc->vc_y > 0) { |
960 | vc->vc_y--; |
961 | vc->vc_pos -= vc->vc_size_row; |
962 | } |
963 | vc->vc_need_wrap = 0; |
964 | } |
965 | |
966 | static inline void cr(struct vc_data *vc) |
967 | { |
968 | vc->vc_pos -= vc->vc_x << 1; |
969 | vc->vc_need_wrap = vc->vc_x = 0; |
970 | } |
971 | |
972 | static inline void bs(struct vc_data *vc) |
973 | { |
974 | if (vc->vc_x) { |
975 | vc->vc_pos -= 2; |
976 | vc->vc_x--; |
977 | vc->vc_need_wrap = 0; |
978 | } |
979 | } |
980 | |
981 | static inline void del(struct vc_data *vc) |
982 | { |
983 | /* ignored */ |
984 | } |
985 | |
986 | static void csi_J(struct vc_data *vc, int vpar) |
987 | { |
988 | unsigned int count; |
989 | unsigned short * start; |
990 | |
991 | switch (vpar) { |
992 | case 0: /* erase from cursor to end of display */ |
993 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; |
994 | start = (unsigned short *)vc->vc_pos; |
995 | if (DO_UPDATE(vc)) { |
996 | /* do in two stages */ |
997 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, |
998 | vc->vc_cols - vc->vc_x); |
999 | vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, |
1000 | vc->vc_rows - vc->vc_y - 1, |
1001 | vc->vc_cols); |
1002 | } |
1003 | break; |
1004 | case 1: /* erase from start to cursor */ |
1005 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; |
1006 | start = (unsigned short *)vc->vc_origin; |
1007 | if (DO_UPDATE(vc)) { |
1008 | /* do in two stages */ |
1009 | vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, |
1010 | vc->vc_cols); |
1011 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
1012 | vc->vc_x + 1); |
1013 | } |
1014 | break; |
1015 | case 2: /* erase whole display */ |
1016 | count = vc->vc_cols * vc->vc_rows; |
1017 | start = (unsigned short *)vc->vc_origin; |
1018 | if (DO_UPDATE(vc)) |
1019 | vc->vc_sw->con_clear(vc, 0, 0, |
1020 | vc->vc_rows, |
1021 | vc->vc_cols); |
1022 | break; |
1023 | default: |
1024 | return; |
1025 | } |
1026 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); |
1027 | vc->vc_need_wrap = 0; |
1028 | } |
1029 | |
1030 | static void csi_K(struct vc_data *vc, int vpar) |
1031 | { |
1032 | unsigned int count; |
1033 | unsigned short * start; |
1034 | |
1035 | switch (vpar) { |
1036 | case 0: /* erase from cursor to end of line */ |
1037 | count = vc->vc_cols - vc->vc_x; |
1038 | start = (unsigned short *)vc->vc_pos; |
1039 | if (DO_UPDATE(vc)) |
1040 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, |
1041 | vc->vc_cols - vc->vc_x); |
1042 | break; |
1043 | case 1: /* erase from start of line to cursor */ |
1044 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); |
1045 | count = vc->vc_x + 1; |
1046 | if (DO_UPDATE(vc)) |
1047 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
1048 | vc->vc_x + 1); |
1049 | break; |
1050 | case 2: /* erase whole line */ |
1051 | start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); |
1052 | count = vc->vc_cols; |
1053 | if (DO_UPDATE(vc)) |
1054 | vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, |
1055 | vc->vc_cols); |
1056 | break; |
1057 | default: |
1058 | return; |
1059 | } |
1060 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); |
1061 | vc->vc_need_wrap = 0; |
1062 | } |
1063 | |
1064 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ |
1065 | { /* not vt100? */ |
1066 | int count; |
1067 | |
1068 | if (!vpar) |
1069 | vpar++; |
1070 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; |
1071 | |
1072 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); |
1073 | if (DO_UPDATE(vc)) |
1074 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); |
1075 | vc->vc_need_wrap = 0; |
1076 | } |
1077 | |
1078 | static void default_attr(struct vc_data *vc) |
1079 | { |
1080 | vc->vc_intensity = 1; |
1081 | vc->vc_underline = 0; |
1082 | vc->vc_reverse = 0; |
1083 | vc->vc_blink = 0; |
1084 | vc->vc_color = vc->vc_def_color; |
1085 | } |
1086 | |
1087 | /* console_sem is held */ |
1088 | static void csi_m(struct vc_data *vc) |
1089 | { |
1090 | int i; |
1091 | |
1092 | for (i = 0; i <= vc->vc_npar; i++) |
1093 | switch (vc->vc_par[i]) { |
1094 | case 0: /* all attributes off */ |
1095 | default_attr(vc); |
1096 | break; |
1097 | case 1: |
1098 | vc->vc_intensity = 2; |
1099 | break; |
1100 | case 2: |
1101 | vc->vc_intensity = 0; |
1102 | break; |
1103 | case 4: |
1104 | vc->vc_underline = 1; |
1105 | break; |
1106 | case 5: |
1107 | vc->vc_blink = 1; |
1108 | break; |
1109 | case 7: |
1110 | vc->vc_reverse = 1; |
1111 | break; |
1112 | case 10: /* ANSI X3.64-1979 (SCO-ish?) |
1113 | * Select primary font, don't display |
1114 | * control chars if defined, don't set |
1115 | * bit 8 on output. |
1116 | */ |
1117 | vc->vc_translate = set_translate(vc->vc_charset == 0 |
1118 | ? vc->vc_G0_charset |
1119 | : vc->vc_G1_charset, vc); |
1120 | vc->vc_disp_ctrl = 0; |
1121 | vc->vc_toggle_meta = 0; |
1122 | break; |
1123 | case 11: /* ANSI X3.64-1979 (SCO-ish?) |
1124 | * Select first alternate font, lets |
1125 | * chars < 32 be displayed as ROM chars. |
1126 | */ |
1127 | vc->vc_translate = set_translate(IBMPC_MAP, vc); |
1128 | vc->vc_disp_ctrl = 1; |
1129 | vc->vc_toggle_meta = 0; |
1130 | break; |
1131 | case 12: /* ANSI X3.64-1979 (SCO-ish?) |
1132 | * Select second alternate font, toggle |
1133 | * high bit before displaying as ROM char. |
1134 | */ |
1135 | vc->vc_translate = set_translate(IBMPC_MAP, vc); |
1136 | vc->vc_disp_ctrl = 1; |
1137 | vc->vc_toggle_meta = 1; |
1138 | break; |
1139 | case 21: |
1140 | case 22: |
1141 | vc->vc_intensity = 1; |
1142 | break; |
1143 | case 24: |
1144 | vc->vc_underline = 0; |
1145 | break; |
1146 | case 25: |
1147 | vc->vc_blink = 0; |
1148 | break; |
1149 | case 27: |
1150 | vc->vc_reverse = 0; |
1151 | break; |
1152 | case 38: /* ANSI X3.64-1979 (SCO-ish?) |
1153 | * Enables underscore, white foreground |
1154 | * with white underscore (Linux - use |
1155 | * default foreground). |
1156 | */ |
1157 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); |
1158 | vc->vc_underline = 1; |
1159 | break; |
1160 | case 39: /* ANSI X3.64-1979 (SCO-ish?) |
1161 | * Disable underline option. |
1162 | * Reset colour to default? It did this |
1163 | * before... |
1164 | */ |
1165 | vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); |
1166 | vc->vc_underline = 0; |
1167 | break; |
1168 | case 49: |
1169 | vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); |
1170 | break; |
1171 | default: |
1172 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
1173 | vc->vc_color = color_table[vc->vc_par[i] - 30] |
1174 | | (vc->vc_color & 0xf0); |
1175 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) |
1176 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) |
1177 | | (vc->vc_color & 0x0f); |
1178 | break; |
1179 | } |
1180 | update_attr(vc); |
1181 | } |
1182 | |
1183 | static void respond_string(const char *p, struct tty_struct *tty) |
1184 | { |
1185 | while (*p) { |
1186 | tty_insert_flip_char(tty, *p, 0); |
1187 | p++; |
1188 | } |
1189 | con_schedule_flip(tty); |
1190 | } |
1191 | |
1192 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) |
1193 | { |
1194 | char buf[40]; |
1195 | |
1196 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); |
1197 | respond_string(buf, tty); |
1198 | } |
1199 | |
1200 | static inline void status_report(struct tty_struct *tty) |
1201 | { |
1202 | respond_string("\033[0n", tty); /* Terminal ok */ |
1203 | } |
1204 | |
1205 | static inline void respond_ID(struct tty_struct * tty) |
1206 | { |
1207 | respond_string(VT102ID, tty); |
1208 | } |
1209 | |
1210 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) |
1211 | { |
1212 | char buf[8]; |
1213 | |
1214 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), |
1215 | (char)('!' + mry)); |
1216 | respond_string(buf, tty); |
1217 | } |
1218 | |
1219 | /* invoked via ioctl(TIOCLINUX) and through set_selection */ |
1220 | int mouse_reporting(void) |
1221 | { |
1222 | return vc_cons[fg_console].d->vc_report_mouse; |
1223 | } |
1224 | |
1225 | /* console_sem is held */ |
1226 | static void set_mode(struct vc_data *vc, int on_off) |
1227 | { |
1228 | int i; |
1229 | |
1230 | for (i = 0; i <= vc->vc_npar; i++) |
1231 | if (vc->vc_ques) { |
1232 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ |
1233 | case 1: /* Cursor keys send ^[Ox/^[[x */ |
1234 | if (on_off) |
1235 | set_kbd(vc, decckm); |
1236 | else |
1237 | clr_kbd(vc, decckm); |
1238 | break; |
1239 | case 3: /* 80/132 mode switch unimplemented */ |
1240 | vc->vc_deccolm = on_off; |
1241 | #if 0 |
1242 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); |
1243 | /* this alone does not suffice; some user mode |
1244 | utility has to change the hardware regs */ |
1245 | #endif |
1246 | break; |
1247 | case 5: /* Inverted screen on/off */ |
1248 | if (vc->vc_decscnm != on_off) { |
1249 | vc->vc_decscnm = on_off; |
1250 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); |
1251 | update_attr(vc); |
1252 | } |
1253 | break; |
1254 | case 6: /* Origin relative/absolute */ |
1255 | vc->vc_decom = on_off; |
1256 | gotoxay(vc, 0, 0); |
1257 | break; |
1258 | case 7: /* Autowrap on/off */ |
1259 | vc->vc_decawm = on_off; |
1260 | break; |
1261 | case 8: /* Autorepeat on/off */ |
1262 | if (on_off) |
1263 | set_kbd(vc, decarm); |
1264 | else |
1265 | clr_kbd(vc, decarm); |
1266 | break; |
1267 | case 9: |
1268 | vc->vc_report_mouse = on_off ? 1 : 0; |
1269 | break; |
1270 | case 25: /* Cursor on/off */ |
1271 | vc->vc_deccm = on_off; |
1272 | break; |
1273 | case 1000: |
1274 | vc->vc_report_mouse = on_off ? 2 : 0; |
1275 | break; |
1276 | } |
1277 | } else { |
1278 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ |
1279 | case 3: /* Monitor (display ctrls) */ |
1280 | vc->vc_disp_ctrl = on_off; |
1281 | break; |
1282 | case 4: /* Insert Mode on/off */ |
1283 | vc->vc_decim = on_off; |
1284 | break; |
1285 | case 20: /* Lf, Enter == CrLf/Lf */ |
1286 | if (on_off) |
1287 | set_kbd(vc, lnm); |
1288 | else |
1289 | clr_kbd(vc, lnm); |
1290 | break; |
1291 | } |
1292 | } |
1293 | } |
1294 | |
1295 | /* console_sem is held */ |
1296 | static void setterm_command(struct vc_data *vc) |
1297 | { |
1298 | switch(vc->vc_par[0]) { |
1299 | case 1: /* set color for underline mode */ |
1300 | if (vc->vc_can_do_color && |
1301 | vc->vc_par[1] < 16) { |
1302 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; |
1303 | if (vc->vc_underline) |
1304 | update_attr(vc); |
1305 | } |
1306 | break; |
1307 | case 2: /* set color for half intensity mode */ |
1308 | if (vc->vc_can_do_color && |
1309 | vc->vc_par[1] < 16) { |
1310 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; |
1311 | if (vc->vc_intensity == 0) |
1312 | update_attr(vc); |
1313 | } |
1314 | break; |
1315 | case 8: /* store colors as defaults */ |
1316 | vc->vc_def_color = vc->vc_attr; |
1317 | if (vc->vc_hi_font_mask == 0x100) |
1318 | vc->vc_def_color >>= 1; |
1319 | default_attr(vc); |
1320 | update_attr(vc); |
1321 | break; |
1322 | case 9: /* set blanking interval */ |
1323 | blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; |
1324 | poke_blanked_console(); |
1325 | break; |
1326 | case 10: /* set bell frequency in Hz */ |
1327 | if (vc->vc_npar >= 1) |
1328 | vc->vc_bell_pitch = vc->vc_par[1]; |
1329 | else |
1330 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; |
1331 | break; |
1332 | case 11: /* set bell duration in msec */ |
1333 | if (vc->vc_npar >= 1) |
1334 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? |
1335 | vc->vc_par[1] * HZ / 1000 : 0; |
1336 | else |
1337 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; |
1338 | break; |
1339 | case 12: /* bring specified console to the front */ |
1340 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) |
1341 | set_console(vc->vc_par[1] - 1); |
1342 | break; |
1343 | case 13: /* unblank the screen */ |
1344 | poke_blanked_console(); |
1345 | break; |
1346 | case 14: /* set vesa powerdown interval */ |
1347 | vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; |
1348 | break; |
1349 | case 15: /* activate the previous console */ |
1350 | set_console(last_console); |
1351 | break; |
1352 | } |
1353 | } |
1354 | |
1355 | /* console_sem is held */ |
1356 | static void csi_at(struct vc_data *vc, unsigned int nr) |
1357 | { |
1358 | if (nr > vc->vc_cols - vc->vc_x) |
1359 | nr = vc->vc_cols - vc->vc_x; |
1360 | else if (!nr) |
1361 | nr = 1; |
1362 | insert_char(vc, nr); |
1363 | } |
1364 | |
1365 | /* console_sem is held */ |
1366 | static void csi_L(struct vc_data *vc, unsigned int nr) |
1367 | { |
1368 | if (nr > vc->vc_rows - vc->vc_y) |
1369 | nr = vc->vc_rows - vc->vc_y; |
1370 | else if (!nr) |
1371 | nr = 1; |
1372 | scrdown(vc, vc->vc_y, vc->vc_bottom, nr); |
1373 | vc->vc_need_wrap = 0; |
1374 | } |
1375 | |
1376 | /* console_sem is held */ |
1377 | static void csi_P(struct vc_data *vc, unsigned int nr) |
1378 | { |
1379 | if (nr > vc->vc_cols - vc->vc_x) |
1380 | nr = vc->vc_cols - vc->vc_x; |
1381 | else if (!nr) |
1382 | nr = 1; |
1383 | delete_char(vc, nr); |
1384 | } |
1385 | |
1386 | /* console_sem is held */ |
1387 | static void csi_M(struct vc_data *vc, unsigned int nr) |
1388 | { |
1389 | if (nr > vc->vc_rows - vc->vc_y) |
1390 | nr = vc->vc_rows - vc->vc_y; |
1391 | else if (!nr) |
1392 | nr=1; |
1393 | scrup(vc, vc->vc_y, vc->vc_bottom, nr); |
1394 | vc->vc_need_wrap = 0; |
1395 | } |
1396 | |
1397 | /* console_sem is held (except via vc_init->reset_terminal */ |
1398 | static void save_cur(struct vc_data *vc) |
1399 | { |
1400 | vc->vc_saved_x = vc->vc_x; |
1401 | vc->vc_saved_y = vc->vc_y; |
1402 | vc->vc_s_intensity = vc->vc_intensity; |
1403 | vc->vc_s_underline = vc->vc_underline; |
1404 | vc->vc_s_blink = vc->vc_blink; |
1405 | vc->vc_s_reverse = vc->vc_reverse; |
1406 | vc->vc_s_charset = vc->vc_charset; |
1407 | vc->vc_s_color = vc->vc_color; |
1408 | vc->vc_saved_G0 = vc->vc_G0_charset; |
1409 | vc->vc_saved_G1 = vc->vc_G1_charset; |
1410 | } |
1411 | |
1412 | /* console_sem is held */ |
1413 | static void restore_cur(struct vc_data *vc) |
1414 | { |
1415 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); |
1416 | vc->vc_intensity = vc->vc_s_intensity; |
1417 | vc->vc_underline = vc->vc_s_underline; |
1418 | vc->vc_blink = vc->vc_s_blink; |
1419 | vc->vc_reverse = vc->vc_s_reverse; |
1420 | vc->vc_charset = vc->vc_s_charset; |
1421 | vc->vc_color = vc->vc_s_color; |
1422 | vc->vc_G0_charset = vc->vc_saved_G0; |
1423 | vc->vc_G1_charset = vc->vc_saved_G1; |
1424 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); |
1425 | update_attr(vc); |
1426 | vc->vc_need_wrap = 0; |
1427 | } |
1428 | |
1429 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, |
1430 | EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, |
1431 | ESpalette }; |
1432 | |
1433 | /* console_sem is held (except via vc_init()) */ |
1434 | static void reset_terminal(struct vc_data *vc, int do_clear) |
1435 | { |
1436 | vc->vc_top = 0; |
1437 | vc->vc_bottom = vc->vc_rows; |
1438 | vc->vc_state = ESnormal; |
1439 | vc->vc_ques = 0; |
1440 | vc->vc_translate = set_translate(LAT1_MAP, vc); |
1441 | vc->vc_G0_charset = LAT1_MAP; |
1442 | vc->vc_G1_charset = GRAF_MAP; |
1443 | vc->vc_charset = 0; |
1444 | vc->vc_need_wrap = 0; |
1445 | vc->vc_report_mouse = 0; |
1446 | vc->vc_utf = 0; |
1447 | vc->vc_utf_count = 0; |
1448 | |
1449 | vc->vc_disp_ctrl = 0; |
1450 | vc->vc_toggle_meta = 0; |
1451 | |
1452 | vc->vc_decscnm = 0; |
1453 | vc->vc_decom = 0; |
1454 | vc->vc_decawm = 1; |
1455 | vc->vc_deccm = 1; |
1456 | vc->vc_decim = 0; |
1457 | |
1458 | set_kbd(vc, decarm); |
1459 | clr_kbd(vc, decckm); |
1460 | clr_kbd(vc, kbdapplic); |
1461 | clr_kbd(vc, lnm); |
1462 | kbd_table[vc->vc_num].lockstate = 0; |
1463 | kbd_table[vc->vc_num].slockstate = 0; |
1464 | kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; |
1465 | kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; |
1466 | /* do not do set_leds here because this causes an endless tasklet loop |
1467 | when the keyboard hasn't been initialized yet */ |
1468 | |
1469 | vc->vc_cursor_type = CUR_DEFAULT; |
1470 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1471 | |
1472 | default_attr(vc); |
1473 | update_attr(vc); |
1474 | |
1475 | vc->vc_tab_stop[0] = 0x01010100; |
1476 | vc->vc_tab_stop[1] = |
1477 | vc->vc_tab_stop[2] = |
1478 | vc->vc_tab_stop[3] = |
1479 | vc->vc_tab_stop[4] = 0x01010101; |
1480 | |
1481 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; |
1482 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; |
1483 | |
1484 | gotoxy(vc, 0, 0); |
1485 | save_cur(vc); |
1486 | if (do_clear) |
1487 | csi_J(vc, 2); |
1488 | } |
1489 | |
1490 | /* console_sem is held */ |
1491 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
1492 | { |
1493 | /* |
1494 | * Control characters can be used in the _middle_ |
1495 | * of an escape sequence. |
1496 | */ |
1497 | switch (c) { |
1498 | case 0: |
1499 | return; |
1500 | case 7: |
1501 | if (vc->vc_bell_duration) |
1502 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); |
1503 | return; |
1504 | case 8: |
1505 | bs(vc); |
1506 | return; |
1507 | case 9: |
1508 | vc->vc_pos -= (vc->vc_x << 1); |
1509 | while (vc->vc_x < vc->vc_cols - 1) { |
1510 | vc->vc_x++; |
1511 | if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) |
1512 | break; |
1513 | } |
1514 | vc->vc_pos += (vc->vc_x << 1); |
1515 | return; |
1516 | case 10: case 11: case 12: |
1517 | lf(vc); |
1518 | if (!is_kbd(vc, lnm)) |
1519 | return; |
1520 | case 13: |
1521 | cr(vc); |
1522 | return; |
1523 | case 14: |
1524 | vc->vc_charset = 1; |
1525 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); |
1526 | vc->vc_disp_ctrl = 1; |
1527 | return; |
1528 | case 15: |
1529 | vc->vc_charset = 0; |
1530 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); |
1531 | vc->vc_disp_ctrl = 0; |
1532 | return; |
1533 | case 24: case 26: |
1534 | vc->vc_state = ESnormal; |
1535 | return; |
1536 | case 27: |
1537 | vc->vc_state = ESesc; |
1538 | return; |
1539 | case 127: |
1540 | del(vc); |
1541 | return; |
1542 | case 128+27: |
1543 | vc->vc_state = ESsquare; |
1544 | return; |
1545 | } |
1546 | switch(vc->vc_state) { |
1547 | case ESesc: |
1548 | vc->vc_state = ESnormal; |
1549 | switch (c) { |
1550 | case '[': |
1551 | vc->vc_state = ESsquare; |
1552 | return; |
1553 | case ']': |
1554 | vc->vc_state = ESnonstd; |
1555 | return; |
1556 | case '%': |
1557 | vc->vc_state = ESpercent; |
1558 | return; |
1559 | case 'E': |
1560 | cr(vc); |
1561 | lf(vc); |
1562 | return; |
1563 | case 'M': |
1564 | ri(vc); |
1565 | return; |
1566 | case 'D': |
1567 | lf(vc); |
1568 | return; |
1569 | case 'H': |
1570 | vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); |
1571 | return; |
1572 | case 'Z': |
1573 | respond_ID(tty); |
1574 | return; |
1575 | case '7': |
1576 | save_cur(vc); |
1577 | return; |
1578 | case '8': |
1579 | restore_cur(vc); |
1580 | return; |
1581 | case '(': |
1582 | vc->vc_state = ESsetG0; |
1583 | return; |
1584 | case ')': |
1585 | vc->vc_state = ESsetG1; |
1586 | return; |
1587 | case '#': |
1588 | vc->vc_state = EShash; |
1589 | return; |
1590 | case 'c': |
1591 | reset_terminal(vc, 1); |
1592 | return; |
1593 | case '>': /* Numeric keypad */ |
1594 | clr_kbd(vc, kbdapplic); |
1595 | return; |
1596 | case '=': /* Appl. keypad */ |
1597 | set_kbd(vc, kbdapplic); |
1598 | return; |
1599 | } |
1600 | return; |
1601 | case ESnonstd: |
1602 | if (c=='P') { /* palette escape sequence */ |
1603 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) |
1604 | vc->vc_par[vc->vc_npar] = 0; |
1605 | vc->vc_npar = 0; |
1606 | vc->vc_state = ESpalette; |
1607 | return; |
1608 | } else if (c=='R') { /* reset palette */ |
1609 | reset_palette(vc); |
1610 | vc->vc_state = ESnormal; |
1611 | } else |
1612 | vc->vc_state = ESnormal; |
1613 | return; |
1614 | case ESpalette: |
1615 | if ( (c>='0'&&c<='9') || (c>='A'&&c<='F') || (c>='a'&&c<='f') ) { |
1616 | vc->vc_par[vc->vc_npar++] = (c > '9' ? (c & 0xDF) - 'A' + 10 : c - '0'); |
1617 | if (vc->vc_npar == 7) { |
1618 | int i = vc->vc_par[0] * 3, j = 1; |
1619 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
1620 | vc->vc_palette[i++] += vc->vc_par[j++]; |
1621 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
1622 | vc->vc_palette[i++] += vc->vc_par[j++]; |
1623 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; |
1624 | vc->vc_palette[i] += vc->vc_par[j]; |
1625 | set_palette(vc); |
1626 | vc->vc_state = ESnormal; |
1627 | } |
1628 | } else |
1629 | vc->vc_state = ESnormal; |
1630 | return; |
1631 | case ESsquare: |
1632 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) |
1633 | vc->vc_par[vc->vc_npar] = 0; |
1634 | vc->vc_npar = 0; |
1635 | vc->vc_state = ESgetpars; |
1636 | if (c == '[') { /* Function key */ |
1637 | vc->vc_state=ESfunckey; |
1638 | return; |
1639 | } |
1640 | vc->vc_ques = (c == '?'); |
1641 | if (vc->vc_ques) |
1642 | return; |
1643 | case ESgetpars: |
1644 | if (c == ';' && vc->vc_npar < NPAR - 1) { |
1645 | vc->vc_npar++; |
1646 | return; |
1647 | } else if (c>='0' && c<='9') { |
1648 | vc->vc_par[vc->vc_npar] *= 10; |
1649 | vc->vc_par[vc->vc_npar] += c - '0'; |
1650 | return; |
1651 | } else |
1652 | vc->vc_state = ESgotpars; |
1653 | case ESgotpars: |
1654 | vc->vc_state = ESnormal; |
1655 | switch(c) { |
1656 | case 'h': |
1657 | set_mode(vc, 1); |
1658 | return; |
1659 | case 'l': |
1660 | set_mode(vc, 0); |
1661 | return; |
1662 | case 'c': |
1663 | if (vc->vc_ques) { |
1664 | if (vc->vc_par[0]) |
1665 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); |
1666 | else |
1667 | vc->vc_cursor_type = CUR_DEFAULT; |
1668 | return; |
1669 | } |
1670 | break; |
1671 | case 'm': |
1672 | if (vc->vc_ques) { |
1673 | clear_selection(); |
1674 | if (vc->vc_par[0]) |
1675 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; |
1676 | else |
1677 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
1678 | return; |
1679 | } |
1680 | break; |
1681 | case 'n': |
1682 | if (!vc->vc_ques) { |
1683 | if (vc->vc_par[0] == 5) |
1684 | status_report(tty); |
1685 | else if (vc->vc_par[0] == 6) |
1686 | cursor_report(vc, tty); |
1687 | } |
1688 | return; |
1689 | } |
1690 | if (vc->vc_ques) { |
1691 | vc->vc_ques = 0; |
1692 | return; |
1693 | } |
1694 | switch(c) { |
1695 | case 'G': case '`': |
1696 | if (vc->vc_par[0]) |
1697 | vc->vc_par[0]--; |
1698 | gotoxy(vc, vc->vc_par[0], vc->vc_y); |
1699 | return; |
1700 | case 'A': |
1701 | if (!vc->vc_par[0]) |
1702 | vc->vc_par[0]++; |
1703 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); |
1704 | return; |
1705 | case 'B': case 'e': |
1706 | if (!vc->vc_par[0]) |
1707 | vc->vc_par[0]++; |
1708 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); |
1709 | return; |
1710 | case 'C': case 'a': |
1711 | if (!vc->vc_par[0]) |
1712 | vc->vc_par[0]++; |
1713 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); |
1714 | return; |
1715 | case 'D': |
1716 | if (!vc->vc_par[0]) |
1717 | vc->vc_par[0]++; |
1718 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); |
1719 | return; |
1720 | case 'E': |
1721 | if (!vc->vc_par[0]) |
1722 | vc->vc_par[0]++; |
1723 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); |
1724 | return; |
1725 | case 'F': |
1726 | if (!vc->vc_par[0]) |
1727 | vc->vc_par[0]++; |
1728 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); |
1729 | return; |
1730 | case 'd': |
1731 | if (vc->vc_par[0]) |
1732 | vc->vc_par[0]--; |
1733 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); |
1734 | return; |
1735 | case 'H': case 'f': |
1736 | if (vc->vc_par[0]) |
1737 | vc->vc_par[0]--; |
1738 | if (vc->vc_par[1]) |
1739 | vc->vc_par[1]--; |
1740 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); |
1741 | return; |
1742 | case 'J': |
1743 | csi_J(vc, vc->vc_par[0]); |
1744 | return; |
1745 | case 'K': |
1746 | csi_K(vc, vc->vc_par[0]); |
1747 | return; |
1748 | case 'L': |
1749 | csi_L(vc, vc->vc_par[0]); |
1750 | return; |
1751 | case 'M': |
1752 | csi_M(vc, vc->vc_par[0]); |
1753 | return; |
1754 | case 'P': |
1755 | csi_P(vc, vc->vc_par[0]); |
1756 | return; |
1757 | case 'c': |
1758 | if (!vc->vc_par[0]) |
1759 | respond_ID(tty); |
1760 | return; |
1761 | case 'g': |
1762 | if (!vc->vc_par[0]) |
1763 | vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); |
1764 | else if (vc->vc_par[0] == 3) { |
1765 | vc->vc_tab_stop[0] = |
1766 | vc->vc_tab_stop[1] = |
1767 | vc->vc_tab_stop[2] = |
1768 | vc->vc_tab_stop[3] = |
1769 | vc->vc_tab_stop[4] = 0; |
1770 | } |
1771 | return; |
1772 | case 'm': |
1773 | csi_m(vc); |
1774 | return; |
1775 | case 'q': /* DECLL - but only 3 leds */ |
1776 | /* map 0,1,2,3 to 0,1,2,4 */ |
1777 | if (vc->vc_par[0] < 4) |
1778 | setledstate(kbd_table + vc->vc_num, |
1779 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
1780 | return; |
1781 | case 'r': |
1782 | if (!vc->vc_par[0]) |
1783 | vc->vc_par[0]++; |
1784 | if (!vc->vc_par[1]) |
1785 | vc->vc_par[1] = vc->vc_rows; |
1786 | /* Minimum allowed region is 2 lines */ |
1787 | if (vc->vc_par[0] < vc->vc_par[1] && |
1788 | vc->vc_par[1] <= vc->vc_rows) { |
1789 | vc->vc_top = vc->vc_par[0] - 1; |
1790 | vc->vc_bottom = vc->vc_par[1]; |
1791 | gotoxay(vc, 0, 0); |
1792 | } |
1793 | return; |
1794 | case 's': |
1795 | save_cur(vc); |
1796 | return; |
1797 | case 'u': |
1798 | restore_cur(vc); |
1799 | return; |
1800 | case 'X': |
1801 | csi_X(vc, vc->vc_par[0]); |
1802 | return; |
1803 | case '@': |
1804 | csi_at(vc, vc->vc_par[0]); |
1805 | return; |
1806 | case ']': /* setterm functions */ |
1807 | setterm_command(vc); |
1808 | return; |
1809 | } |
1810 | return; |
1811 | case ESpercent: |
1812 | vc->vc_state = ESnormal; |
1813 | switch (c) { |
1814 | case '@': /* defined in ISO 2022 */ |
1815 | vc->vc_utf = 0; |
1816 | return; |
1817 | case 'G': /* prelim official escape code */ |
1818 | case '8': /* retained for compatibility */ |
1819 | vc->vc_utf = 1; |
1820 | return; |
1821 | } |
1822 | return; |
1823 | case ESfunckey: |
1824 | vc->vc_state = ESnormal; |
1825 | return; |
1826 | case EShash: |
1827 | vc->vc_state = ESnormal; |
1828 | if (c == '8') { |
1829 | /* DEC screen alignment test. kludge :-) */ |
1830 | vc->vc_video_erase_char = |
1831 | (vc->vc_video_erase_char & 0xff00) | 'E'; |
1832 | csi_J(vc, 2); |
1833 | vc->vc_video_erase_char = |
1834 | (vc->vc_video_erase_char & 0xff00) | ' '; |
1835 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
1836 | } |
1837 | return; |
1838 | case ESsetG0: |
1839 | if (c == '0') |
1840 | vc->vc_G0_charset = GRAF_MAP; |
1841 | else if (c == 'B') |
1842 | vc->vc_G0_charset = LAT1_MAP; |
1843 | else if (c == 'U') |
1844 | vc->vc_G0_charset = IBMPC_MAP; |
1845 | else if (c == 'K') |
1846 | vc->vc_G0_charset = USER_MAP; |
1847 | if (vc->vc_charset == 0) |
1848 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); |
1849 | vc->vc_state = ESnormal; |
1850 | return; |
1851 | case ESsetG1: |
1852 | if (c == '0') |
1853 | vc->vc_G1_charset = GRAF_MAP; |
1854 | else if (c == 'B') |
1855 | vc->vc_G1_charset = LAT1_MAP; |
1856 | else if (c == 'U') |
1857 | vc->vc_G1_charset = IBMPC_MAP; |
1858 | else if (c == 'K') |
1859 | vc->vc_G1_charset = USER_MAP; |
1860 | if (vc->vc_charset == 1) |
1861 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); |
1862 | vc->vc_state = ESnormal; |
1863 | return; |
1864 | default: |
1865 | vc->vc_state = ESnormal; |
1866 | } |
1867 | } |
1868 | |
1869 | /* This is a temporary buffer used to prepare a tty console write |
1870 | * so that we can easily avoid touching user space while holding the |
1871 | * console spinlock. It is allocated in con_init and is shared by |
1872 | * this code and the vc_screen read/write tty calls. |
1873 | * |
1874 | * We have to allocate this statically in the kernel data section |
1875 | * since console_init (and thus con_init) are called before any |
1876 | * kernel memory allocation is available. |
1877 | */ |
1878 | char con_buf[CON_BUF_SIZE]; |
1879 | DECLARE_MUTEX(con_buf_sem); |
1880 | |
1881 | /* acquires console_sem */ |
1882 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
1883 | { |
1884 | #ifdef VT_BUF_VRAM_ONLY |
1885 | #define FLUSH do { } while(0); |
1886 | #else |
1887 | #define FLUSH if (draw_x >= 0) { \ |
1888 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ |
1889 | draw_x = -1; \ |
1890 | } |
1891 | #endif |
1892 | |
1893 | int c, tc, ok, n = 0, draw_x = -1; |
1894 | unsigned int currcons; |
1895 | unsigned long draw_from = 0, draw_to = 0; |
1896 | struct vc_data *vc; |
1897 | u16 himask, charmask; |
1898 | const unsigned char *orig_buf = NULL; |
1899 | int orig_count; |
1900 | |
1901 | if (in_interrupt()) |
1902 | return count; |
1903 | |
1904 | might_sleep(); |
1905 | |
1906 | acquire_console_sem(); |
1907 | vc = tty->driver_data; |
1908 | if (vc == NULL) { |
1909 | printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); |
1910 | release_console_sem(); |
1911 | return 0; |
1912 | } |
1913 | |
1914 | currcons = vc->vc_num; |
1915 | if (!vc_cons_allocated(currcons)) { |
1916 | /* could this happen? */ |
1917 | static int error = 0; |
1918 | if (!error) { |
1919 | error = 1; |
1920 | printk("con_write: tty %d not allocated\n", currcons+1); |
1921 | } |
1922 | release_console_sem(); |
1923 | return 0; |
1924 | } |
1925 | release_console_sem(); |
1926 | |
1927 | orig_buf = buf; |
1928 | orig_count = count; |
1929 | |
1930 | /* At this point 'buf' is guaranteed to be a kernel buffer |
1931 | * and therefore no access to userspace (and therefore sleeping) |
1932 | * will be needed. The con_buf_sem serializes all tty based |
1933 | * console rendering and vcs write/read operations. We hold |
1934 | * the console spinlock during the entire write. |
1935 | */ |
1936 | |
1937 | acquire_console_sem(); |
1938 | |
1939 | vc = tty->driver_data; |
1940 | if (vc == NULL) { |
1941 | printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n"); |
1942 | release_console_sem(); |
1943 | goto out; |
1944 | } |
1945 | |
1946 | himask = vc->vc_hi_font_mask; |
1947 | charmask = himask ? 0x1ff : 0xff; |
1948 | |
1949 | /* undraw cursor first */ |
1950 | if (IS_FG(vc)) |
1951 | hide_cursor(vc); |
1952 | |
1953 | while (!tty->stopped && count) { |
1954 | int orig = *buf; |
1955 | c = orig; |
1956 | buf++; |
1957 | n++; |
1958 | count--; |
1959 | |
1960 | /* Do no translation at all in control states */ |
1961 | if (vc->vc_state != ESnormal) { |
1962 | tc = c; |
1963 | } else if (vc->vc_utf) { |
1964 | /* Combine UTF-8 into Unicode */ |
1965 | /* Incomplete characters silently ignored */ |
1966 | if(c > 0x7f) { |
1967 | if (vc->vc_utf_count > 0 && (c & 0xc0) == 0x80) { |
1968 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
1969 | vc->vc_utf_count--; |
1970 | if (vc->vc_utf_count == 0) |
1971 | tc = c = vc->vc_utf_char; |
1972 | else continue; |
1973 | } else { |
1974 | if ((c & 0xe0) == 0xc0) { |
1975 | vc->vc_utf_count = 1; |
1976 | vc->vc_utf_char = (c & 0x1f); |
1977 | } else if ((c & 0xf0) == 0xe0) { |
1978 | vc->vc_utf_count = 2; |
1979 | vc->vc_utf_char = (c & 0x0f); |
1980 | } else if ((c & 0xf8) == 0xf0) { |
1981 | vc->vc_utf_count = 3; |
1982 | vc->vc_utf_char = (c & 0x07); |
1983 | } else if ((c & 0xfc) == 0xf8) { |
1984 | vc->vc_utf_count = 4; |
1985 | vc->vc_utf_char = (c & 0x03); |
1986 | } else if ((c & 0xfe) == 0xfc) { |
1987 | vc->vc_utf_count = 5; |
1988 | vc->vc_utf_char = (c & 0x01); |
1989 | } else |
1990 | vc->vc_utf_count = 0; |
1991 | continue; |
1992 | } |
1993 | } else { |
1994 | tc = c; |
1995 | vc->vc_utf_count = 0; |
1996 | } |
1997 | } else { /* no utf */ |
1998 | tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c]; |
1999 | } |
2000 | |
2001 | /* If the original code was a control character we |
2002 | * only allow a glyph to be displayed if the code is |
2003 | * not normally used (such as for cursor movement) or |
2004 | * if the disp_ctrl mode has been explicitly enabled. |
2005 | * Certain characters (as given by the CTRL_ALWAYS |
2006 | * bitmap) are always displayed as control characters, |
2007 | * as the console would be pretty useless without |
2008 | * them; to display an arbitrary font position use the |
2009 | * direct-to-font zone in UTF-8 mode. |
2010 | */ |
2011 | ok = tc && (c >= 32 || |
2012 | (!vc->vc_utf && !(((vc->vc_disp_ctrl ? CTRL_ALWAYS |
2013 | : CTRL_ACTION) >> c) & 1))) |
2014 | && (c != 127 || vc->vc_disp_ctrl) |
2015 | && (c != 128+27); |
2016 | |
2017 | if (vc->vc_state == ESnormal && ok) { |
2018 | /* Now try to find out how to display it */ |
2019 | tc = conv_uni_to_pc(vc, tc); |
2020 | if ( tc == -4 ) { |
2021 | /* If we got -4 (not found) then see if we have |
2022 | defined a replacement character (U+FFFD) */ |
2023 | tc = conv_uni_to_pc(vc, 0xfffd); |
2024 | |
2025 | /* One reason for the -4 can be that we just |
2026 | did a clear_unimap(); |
2027 | try at least to show something. */ |
2028 | if (tc == -4) |
2029 | tc = c; |
2030 | } else if ( tc == -3 ) { |
2031 | /* Bad hash table -- hope for the best */ |
2032 | tc = c; |
2033 | } |
2034 | if (tc & ~charmask) |
2035 | continue; /* Conversion failed */ |
2036 | |
2037 | if (vc->vc_need_wrap || vc->vc_decim) |
2038 | FLUSH |
2039 | if (vc->vc_need_wrap) { |
2040 | cr(vc); |
2041 | lf(vc); |
2042 | } |
2043 | if (vc->vc_decim) |
2044 | insert_char(vc, 1); |
2045 | scr_writew(himask ? |
2046 | ((vc->vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : |
2047 | (vc->vc_attr << 8) + tc, |
2048 | (u16 *) vc->vc_pos); |
2049 | if (DO_UPDATE(vc) && draw_x < 0) { |
2050 | draw_x = vc->vc_x; |
2051 | draw_from = vc->vc_pos; |
2052 | } |
2053 | if (vc->vc_x == vc->vc_cols - 1) { |
2054 | vc->vc_need_wrap = vc->vc_decawm; |
2055 | draw_to = vc->vc_pos + 2; |
2056 | } else { |
2057 | vc->vc_x++; |
2058 | draw_to = (vc->vc_pos += 2); |
2059 | } |
2060 | continue; |
2061 | } |
2062 | FLUSH |
2063 | do_con_trol(tty, vc, orig); |
2064 | } |
2065 | FLUSH |
2066 | console_conditional_schedule(); |
2067 | release_console_sem(); |
2068 | |
2069 | out: |
2070 | return n; |
2071 | #undef FLUSH |
2072 | } |
2073 | |
2074 | /* |
2075 | * This is the console switching callback. |
2076 | * |
2077 | * Doing console switching in a process context allows |
2078 | * us to do the switches asynchronously (needed when we want |
2079 | * to switch due to a keyboard interrupt). Synchronization |
2080 | * with other console code and prevention of re-entrancy is |
2081 | * ensured with console_sem. |
2082 | */ |
2083 | static void console_callback(void *ignored) |
2084 | { |
2085 | acquire_console_sem(); |
2086 | |
2087 | if (want_console >= 0) { |
2088 | if (want_console != fg_console && |
2089 | vc_cons_allocated(want_console)) { |
2090 | hide_cursor(vc_cons[fg_console].d); |
2091 | change_console(vc_cons[want_console].d); |
2092 | /* we only changed when the console had already |
2093 | been allocated - a new console is not created |
2094 | in an interrupt routine */ |
2095 | } |
2096 | want_console = -1; |
2097 | } |
2098 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ |
2099 | do_poke_blanked_console = 0; |
2100 | poke_blanked_console(); |
2101 | } |
2102 | if (scrollback_delta) { |
2103 | struct vc_data *vc = vc_cons[fg_console].d; |
2104 | clear_selection(); |
2105 | if (vc->vc_mode == KD_TEXT) |
2106 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); |
2107 | scrollback_delta = 0; |
2108 | } |
2109 | if (blank_timer_expired) { |
2110 | do_blank_screen(0); |
2111 | blank_timer_expired = 0; |
2112 | } |
2113 | |
2114 | release_console_sem(); |
2115 | } |
2116 | |
2117 | void set_console(int nr) |
2118 | { |
2119 | want_console = nr; |
2120 | schedule_console_callback(); |
2121 | } |
2122 | |
2123 | struct tty_driver *console_driver; |
2124 | |
2125 | #ifdef CONFIG_VT_CONSOLE |
2126 | |
2127 | /* |
2128 | * Console on virtual terminal |
2129 | * |
2130 | * The console must be locked when we get here. |
2131 | */ |
2132 | |
2133 | static void vt_console_print(struct console *co, const char *b, unsigned count) |
2134 | { |
2135 | struct vc_data *vc = vc_cons[fg_console].d; |
2136 | unsigned char c; |
2137 | static unsigned long printing; |
2138 | const ushort *start; |
2139 | ushort cnt = 0; |
2140 | ushort myx; |
2141 | |
2142 | /* console busy or not yet initialized */ |
2143 | if (!printable || test_and_set_bit(0, &printing)) |
2144 | return; |
2145 | |
2146 | if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1)) |
2147 | vc = vc_cons[kmsg_redirect - 1].d; |
2148 | |
2149 | /* read `x' only after setting currcons properly (otherwise |
2150 | the `x' macro will read the x of the foreground console). */ |
2151 | myx = vc->vc_x; |
2152 | |
2153 | if (!vc_cons_allocated(fg_console)) { |
2154 | /* impossible */ |
2155 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ |
2156 | goto quit; |
2157 | } |
2158 | |
2159 | if (vc->vc_mode != KD_TEXT) |
2160 | goto quit; |
2161 | |
2162 | /* undraw cursor first */ |
2163 | if (IS_FG(vc)) |
2164 | hide_cursor(vc); |
2165 | |
2166 | start = (ushort *)vc->vc_pos; |
2167 | |
2168 | /* Contrived structure to try to emulate original need_wrap behaviour |
2169 | * Problems caused when we have need_wrap set on '\n' character */ |
2170 | while (count--) { |
2171 | c = *b++; |
2172 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { |
2173 | if (cnt > 0) { |
2174 | if (CON_IS_VISIBLE(vc)) |
2175 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2176 | vc->vc_x += cnt; |
2177 | if (vc->vc_need_wrap) |
2178 | vc->vc_x--; |
2179 | cnt = 0; |
2180 | } |
2181 | if (c == 8) { /* backspace */ |
2182 | bs(vc); |
2183 | start = (ushort *)vc->vc_pos; |
2184 | myx = vc->vc_x; |
2185 | continue; |
2186 | } |
2187 | if (c != 13) |
2188 | lf(vc); |
2189 | cr(vc); |
2190 | start = (ushort *)vc->vc_pos; |
2191 | myx = vc->vc_x; |
2192 | if (c == 10 || c == 13) |
2193 | continue; |
2194 | } |
2195 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); |
2196 | cnt++; |
2197 | if (myx == vc->vc_cols - 1) { |
2198 | vc->vc_need_wrap = 1; |
2199 | continue; |
2200 | } |
2201 | vc->vc_pos += 2; |
2202 | myx++; |
2203 | } |
2204 | if (cnt > 0) { |
2205 | if (CON_IS_VISIBLE(vc)) |
2206 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); |
2207 | vc->vc_x += cnt; |
2208 | if (vc->vc_x == vc->vc_cols) { |
2209 | vc->vc_x--; |
2210 | vc->vc_need_wrap = 1; |
2211 | } |
2212 | } |
2213 | set_cursor(vc); |
2214 | |
2215 | quit: |
2216 | clear_bit(0, &printing); |
2217 | } |
2218 | |
2219 | static struct tty_driver *vt_console_device(struct console *c, int *index) |
2220 | { |
2221 | *index = c->index ? c->index-1 : fg_console; |
2222 | return console_driver; |
2223 | } |
2224 | |
2225 | static struct console vt_console_driver = { |
2226 | .name = "tty", |
2227 | .write = vt_console_print, |
2228 | .device = vt_console_device, |
2229 | .unblank = unblank_screen, |
2230 | .flags = CON_PRINTBUFFER, |
2231 | .index = -1, |
2232 | }; |
2233 | #endif |
2234 | |
2235 | /* |
2236 | * Handling of Linux-specific VC ioctls |
2237 | */ |
2238 | |
2239 | /* |
2240 | * Generally a bit racy with respect to console_sem(). |
2241 | * |
2242 | * There are some functions which don't need it. |
2243 | * |
2244 | * There are some functions which can sleep for arbitrary periods |
2245 | * (paste_selection) but we don't need the lock there anyway. |
2246 | * |
2247 | * set_selection has locking, and definitely needs it |
2248 | */ |
2249 | |
2250 | int tioclinux(struct tty_struct *tty, unsigned long arg) |
2251 | { |
2252 | char type, data; |
2253 | char __user *p = (char __user *)arg; |
2254 | int lines; |
2255 | int ret; |
2256 | |
2257 | if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE) |
2258 | return -EINVAL; |
2259 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
2260 | return -EPERM; |
2261 | if (get_user(type, p)) |
2262 | return -EFAULT; |
2263 | ret = 0; |
2264 | switch (type) |
2265 | { |
2266 | case TIOCL_SETSEL: |
2267 | acquire_console_sem(); |
2268 | ret = set_selection((struct tiocl_selection __user *)(p+1), tty); |
2269 | release_console_sem(); |
2270 | break; |
2271 | case TIOCL_PASTESEL: |
2272 | ret = paste_selection(tty); |
2273 | break; |
2274 | case TIOCL_UNBLANKSCREEN: |
2275 | unblank_screen(); |
2276 | break; |
2277 | case TIOCL_SELLOADLUT: |
2278 | ret = sel_loadlut(p); |
2279 | break; |
2280 | case TIOCL_GETSHIFTSTATE: |
2281 | |
2282 | /* |
2283 | * Make it possible to react to Shift+Mousebutton. |
2284 | * Note that 'shift_state' is an undocumented |
2285 | * kernel-internal variable; programs not closely |
2286 | * related to the kernel should not use this. |
2287 | */ |
2288 | data = shift_state; |
2289 | ret = __put_user(data, p); |
2290 | break; |
2291 | case TIOCL_GETMOUSEREPORTING: |
2292 | data = mouse_reporting(); |
2293 | ret = __put_user(data, p); |
2294 | break; |
2295 | case TIOCL_SETVESABLANK: |
2296 | set_vesa_blanking(p); |
2297 | break; |
2298 | case TIOCL_SETKMSGREDIRECT: |
2299 | if (!capable(CAP_SYS_ADMIN)) { |
2300 | ret = -EPERM; |
2301 | } else { |
2302 | if (get_user(data, p+1)) |
2303 | ret = -EFAULT; |
2304 | else |
2305 | kmsg_redirect = data; |
2306 | } |
2307 | break; |
2308 | case TIOCL_GETFGCONSOLE: |
2309 | ret = fg_console; |
2310 | break; |
2311 | case TIOCL_SCROLLCONSOLE: |
2312 | if (get_user(lines, (s32 __user *)(p+4))) { |
2313 | ret = -EFAULT; |
2314 | } else { |
2315 | scrollfront(vc_cons[fg_console].d, lines); |
2316 | ret = 0; |
2317 | } |
2318 | break; |
2319 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ |
2320 | ignore_poke = 1; |
2321 | do_blank_screen(0); |
2322 | break; |
2323 | case TIOCL_BLANKEDSCREEN: |
2324 | ret = console_blanked; |
2325 | break; |
2326 | default: |
2327 | ret = -EINVAL; |
2328 | break; |
2329 | } |
2330 | return ret; |
2331 | } |
2332 | |
2333 | /* |
2334 | * /dev/ttyN handling |
2335 | */ |
2336 | |
2337 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
2338 | { |
2339 | int retval; |
2340 | |
2341 | retval = do_con_write(tty, buf, count); |
2342 | con_flush_chars(tty); |
2343 | |
2344 | return retval; |
2345 | } |
2346 | |
2347 | static void con_put_char(struct tty_struct *tty, unsigned char ch) |
2348 | { |
2349 | if (in_interrupt()) |
2350 | return; /* n_r3964 calls put_char() from interrupt context */ |
2351 | do_con_write(tty, &ch, 1); |
2352 | } |
2353 | |
2354 | static int con_write_room(struct tty_struct *tty) |
2355 | { |
2356 | if (tty->stopped) |
2357 | return 0; |
2358 | return 4096; /* No limit, really; we're not buffering */ |
2359 | } |
2360 | |
2361 | static int con_chars_in_buffer(struct tty_struct *tty) |
2362 | { |
2363 | return 0; /* we're not buffering */ |
2364 | } |
2365 | |
2366 | /* |
2367 | * con_throttle and con_unthrottle are only used for |
2368 | * paste_selection(), which has to stuff in a large number of |
2369 | * characters... |
2370 | */ |
2371 | static void con_throttle(struct tty_struct *tty) |
2372 | { |
2373 | } |
2374 | |
2375 | static void con_unthrottle(struct tty_struct *tty) |
2376 | { |
2377 | struct vc_data *vc = tty->driver_data; |
2378 | |
2379 | wake_up_interruptible(&vc->paste_wait); |
2380 | } |
2381 | |
2382 | /* |
2383 | * Turn the Scroll-Lock LED on when the tty is stopped |
2384 | */ |
2385 | static void con_stop(struct tty_struct *tty) |
2386 | { |
2387 | int console_num; |
2388 | if (!tty) |
2389 | return; |
2390 | console_num = tty->index; |
2391 | if (!vc_cons_allocated(console_num)) |
2392 | return; |
2393 | set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); |
2394 | set_leds(); |
2395 | } |
2396 | |
2397 | /* |
2398 | * Turn the Scroll-Lock LED off when the console is started |
2399 | */ |
2400 | static void con_start(struct tty_struct *tty) |
2401 | { |
2402 | int console_num; |
2403 | if (!tty) |
2404 | return; |
2405 | console_num = tty->index; |
2406 | if (!vc_cons_allocated(console_num)) |
2407 | return; |
2408 | clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); |
2409 | set_leds(); |
2410 | } |
2411 | |
2412 | static void con_flush_chars(struct tty_struct *tty) |
2413 | { |
2414 | struct vc_data *vc; |
2415 | |
2416 | if (in_interrupt()) /* from flush_to_ldisc */ |
2417 | return; |
2418 | |
2419 | /* if we race with con_close(), vt may be null */ |
2420 | acquire_console_sem(); |
2421 | vc = tty->driver_data; |
2422 | if (vc) |
2423 | set_cursor(vc); |
2424 | release_console_sem(); |
2425 | } |
2426 | |
2427 | /* |
2428 | * Allocate the console screen memory. |
2429 | */ |
2430 | static int con_open(struct tty_struct *tty, struct file *filp) |
2431 | { |
2432 | unsigned int currcons = tty->index; |
2433 | int ret = 0; |
2434 | |
2435 | acquire_console_sem(); |
2436 | if (tty->count == 1) { |
2437 | ret = vc_allocate(currcons); |
2438 | if (ret == 0) { |
2439 | struct vc_data *vc = vc_cons[currcons].d; |
2440 | tty->driver_data = vc; |
2441 | vc->vc_tty = tty; |
2442 | |
2443 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { |
2444 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; |
2445 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; |
2446 | } |
2447 | release_console_sem(); |
2448 | vcs_make_devfs(tty); |
2449 | return ret; |
2450 | } |
2451 | } |
2452 | release_console_sem(); |
2453 | return ret; |
2454 | } |
2455 | |
2456 | /* |
2457 | * We take tty_sem in here to prevent another thread from coming in via init_dev |
2458 | * and taking a ref against the tty while we're in the process of forgetting |
2459 | * about it and cleaning things up. |
2460 | * |
2461 | * This is because vcs_remove_devfs() can sleep and will drop the BKL. |
2462 | */ |
2463 | static void con_close(struct tty_struct *tty, struct file *filp) |
2464 | { |
2465 | down(&tty_sem); |
2466 | acquire_console_sem(); |
2467 | if (tty && tty->count == 1) { |
2468 | struct vc_data *vc = tty->driver_data; |
2469 | |
2470 | if (vc) |
2471 | vc->vc_tty = NULL; |
2472 | tty->driver_data = NULL; |
2473 | release_console_sem(); |
2474 | vcs_remove_devfs(tty); |
2475 | up(&tty_sem); |
2476 | /* |
2477 | * tty_sem is released, but we still hold BKL, so there is |
2478 | * still exclusion against init_dev() |
2479 | */ |
2480 | return; |
2481 | } |
2482 | release_console_sem(); |
2483 | up(&tty_sem); |
2484 | } |
2485 | |
2486 | static void vc_init(struct vc_data *vc, unsigned int rows, |
2487 | unsigned int cols, int do_clear) |
2488 | { |
2489 | int j, k ; |
2490 | |
2491 | vc->vc_cols = cols; |
2492 | vc->vc_rows = rows; |
2493 | vc->vc_size_row = cols << 1; |
2494 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; |
2495 | |
2496 | set_origin(vc); |
2497 | vc->vc_pos = vc->vc_origin; |
2498 | reset_vc(vc); |
2499 | for (j=k=0; j<16; j++) { |
2500 | vc->vc_palette[k++] = default_red[j] ; |
2501 | vc->vc_palette[k++] = default_grn[j] ; |
2502 | vc->vc_palette[k++] = default_blu[j] ; |
2503 | } |
2504 | vc->vc_def_color = 0x07; /* white */ |
2505 | vc->vc_ulcolor = 0x0f; /* bold white */ |
2506 | vc->vc_halfcolor = 0x08; /* grey */ |
2507 | init_waitqueue_head(&vc->paste_wait); |
2508 | reset_terminal(vc, do_clear); |
2509 | } |
2510 | |
2511 | /* |
2512 | * This routine initializes console interrupts, and does nothing |
2513 | * else. If you want the screen to clear, call tty_write with |
2514 | * the appropriate escape-sequence. |
2515 | */ |
2516 | |
2517 | static int __init con_init(void) |
2518 | { |
2519 | const char *display_desc = NULL; |
2520 | struct vc_data *vc; |
2521 | unsigned int currcons = 0; |
2522 | |
2523 | acquire_console_sem(); |
2524 | |
2525 | if (conswitchp) |
2526 | display_desc = conswitchp->con_startup(); |
2527 | if (!display_desc) { |
2528 | fg_console = 0; |
2529 | release_console_sem(); |
2530 | return 0; |
2531 | } |
2532 | |
2533 | init_timer(&console_timer); |
2534 | console_timer.function = blank_screen_t; |
2535 | if (blankinterval) { |
2536 | blank_state = blank_normal_wait; |
2537 | mod_timer(&console_timer, jiffies + blankinterval); |
2538 | } |
2539 | |
2540 | /* |
2541 | * kmalloc is not running yet - we use the bootmem allocator. |
2542 | */ |
2543 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
2544 | vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data)); |
2545 | visual_init(vc, currcons, 1); |
2546 | vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size); |
2547 | vc->vc_kmalloced = 0; |
2548 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
2549 | currcons || !vc->vc_sw->con_save_screen); |
2550 | } |
2551 | currcons = fg_console = 0; |
2552 | master_display_fg = vc = vc_cons[currcons].d; |
2553 | set_origin(vc); |
2554 | save_screen(vc); |
2555 | gotoxy(vc, vc->vc_x, vc->vc_y); |
2556 | csi_J(vc, 0); |
2557 | update_screen(vc); |
2558 | printk("Console: %s %s %dx%d", |
2559 | vc->vc_can_do_color ? "colour" : "mono", |
2560 | display_desc, vc->vc_cols, vc->vc_rows); |
2561 | printable = 1; |
2562 | printk("\n"); |
2563 | |
2564 | release_console_sem(); |
2565 | |
2566 | #ifdef CONFIG_VT_CONSOLE |
2567 | register_console(&vt_console_driver); |
2568 | #endif |
2569 | return 0; |
2570 | } |
2571 | console_initcall(con_init); |
2572 | |
2573 | static struct tty_operations con_ops = { |
2574 | .open = con_open, |
2575 | .close = con_close, |
2576 | .write = con_write, |
2577 | .write_room = con_write_room, |
2578 | .put_char = con_put_char, |
2579 | .flush_chars = con_flush_chars, |
2580 | .chars_in_buffer = con_chars_in_buffer, |
2581 | .ioctl = vt_ioctl, |
2582 | .stop = con_stop, |
2583 | .start = con_start, |
2584 | .throttle = con_throttle, |
2585 | .unthrottle = con_unthrottle, |
2586 | }; |
2587 | |
2588 | int __init vty_init(void) |
2589 | { |
2590 | vcs_init(); |
2591 | |
2592 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); |
2593 | if (!console_driver) |
2594 | panic("Couldn't allocate console driver\n"); |
2595 | console_driver->owner = THIS_MODULE; |
2596 | console_driver->devfs_name = "vc/"; |
2597 | console_driver->name = "tty"; |
2598 | console_driver->name_base = 1; |
2599 | console_driver->major = TTY_MAJOR; |
2600 | console_driver->minor_start = 1; |
2601 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; |
2602 | console_driver->init_termios = tty_std_termios; |
2603 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
2604 | tty_set_operations(console_driver, &con_ops); |
2605 | if (tty_register_driver(console_driver)) |
2606 | panic("Couldn't register console driver\n"); |
2607 | |
2608 | kbd_init(); |
2609 | console_map_init(); |
2610 | #ifdef CONFIG_PROM_CONSOLE |
2611 | prom_con_init(); |
2612 | #endif |
2613 | #ifdef CONFIG_MDA_CONSOLE |
2614 | mda_console_init(); |
2615 | #endif |
2616 | return 0; |
2617 | } |
2618 | |
2619 | #ifndef VT_SINGLE_DRIVER |
2620 | |
2621 | /* |
2622 | * If we support more console drivers, this function is used |
2623 | * when a driver wants to take over some existing consoles |
2624 | * and become default driver for newly opened ones. |
2625 | */ |
2626 | |
2627 | int take_over_console(const struct consw *csw, int first, int last, int deflt) |
2628 | { |
2629 | int i, j = -1; |
2630 | const char *desc; |
2631 | struct module *owner; |
2632 | |
2633 | owner = csw->owner; |
2634 | if (!try_module_get(owner)) |
2635 | return -ENODEV; |
2636 | |
2637 | acquire_console_sem(); |
2638 | |
2639 | desc = csw->con_startup(); |
2640 | if (!desc) { |
2641 | release_console_sem(); |
2642 | module_put(owner); |
2643 | return -ENODEV; |
2644 | } |
2645 | if (deflt) { |
2646 | if (conswitchp) |
2647 | module_put(conswitchp->owner); |
2648 | __module_get(owner); |
2649 | conswitchp = csw; |
2650 | } |
2651 | |
2652 | for (i = first; i <= last; i++) { |
2653 | int old_was_color; |
2654 | struct vc_data *vc = vc_cons[i].d; |
2655 | |
2656 | if (con_driver_map[i]) |
2657 | module_put(con_driver_map[i]->owner); |
2658 | __module_get(owner); |
2659 | con_driver_map[i] = csw; |
2660 | |
2661 | if (!vc || !vc->vc_sw) |
2662 | continue; |
2663 | |
2664 | j = i; |
2665 | if (CON_IS_VISIBLE(vc)) |
2666 | save_screen(vc); |
2667 | old_was_color = vc->vc_can_do_color; |
2668 | vc->vc_sw->con_deinit(vc); |
2669 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
2670 | vc->vc_visible_origin = vc->vc_origin; |
2671 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; |
2672 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; |
2673 | visual_init(vc, i, 0); |
2674 | update_attr(vc); |
2675 | |
2676 | /* If the console changed between mono <-> color, then |
2677 | * the attributes in the screenbuf will be wrong. The |
2678 | * following resets all attributes to something sane. |
2679 | */ |
2680 | if (old_was_color != vc->vc_can_do_color) |
2681 | clear_buffer_attributes(vc); |
2682 | |
2683 | if (CON_IS_VISIBLE(vc)) |
2684 | update_screen(vc); |
2685 | } |
2686 | printk("Console: switching "); |
2687 | if (!deflt) |
2688 | printk("consoles %d-%d ", first+1, last+1); |
2689 | if (j >= 0) |
2690 | printk("to %s %s %dx%d\n", |
2691 | vc_cons[j].d->vc_can_do_color ? "colour" : "mono", |
2692 | desc, vc_cons[j].d->vc_cols, vc_cons[j].d->vc_rows); |
2693 | else |
2694 | printk("to %s\n", desc); |
2695 | |
2696 | release_console_sem(); |
2697 | |
2698 | module_put(owner); |
2699 | return 0; |
2700 | } |
2701 | |
2702 | void give_up_console(const struct consw *csw) |
2703 | { |
2704 | int i; |
2705 | |
2706 | for(i = 0; i < MAX_NR_CONSOLES; i++) |
2707 | if (con_driver_map[i] == csw) { |
2708 | module_put(csw->owner); |
2709 | con_driver_map[i] = NULL; |
2710 | } |
2711 | } |
2712 | |
2713 | #endif |
2714 | |
2715 | /* |
2716 | * Screen blanking |
2717 | */ |
2718 | |
2719 | static void set_vesa_blanking(char __user *p) |
2720 | { |
2721 | unsigned int mode; |
2722 | get_user(mode, p + 1); |
2723 | vesa_blank_mode = (mode < 4) ? mode : 0; |
2724 | } |
2725 | |
2726 | /* |
2727 | * This is called by a timer handler |
2728 | */ |
2729 | static void vesa_powerdown(void) |
2730 | { |
2731 | struct vc_data *c = vc_cons[fg_console].d; |
2732 | /* |
2733 | * Power down if currently suspended (1 or 2), |
2734 | * suspend if currently blanked (0), |
2735 | * else do nothing (i.e. already powered down (3)). |
2736 | * Called only if powerdown features are allowed. |
2737 | */ |
2738 | switch (vesa_blank_mode) { |
2739 | case VESA_NO_BLANKING: |
2740 | c->vc_sw->con_blank(c, VESA_VSYNC_SUSPEND+1, 0); |
2741 | break; |
2742 | case VESA_VSYNC_SUSPEND: |
2743 | case VESA_HSYNC_SUSPEND: |
2744 | c->vc_sw->con_blank(c, VESA_POWERDOWN+1, 0); |
2745 | break; |
2746 | } |
2747 | } |
2748 | |
2749 | void do_blank_screen(int entering_gfx) |
2750 | { |
2751 | struct vc_data *vc = vc_cons[fg_console].d; |
2752 | int i; |
2753 | |
2754 | WARN_CONSOLE_UNLOCKED(); |
2755 | |
2756 | if (console_blanked) { |
2757 | if (blank_state == blank_vesa_wait) { |
2758 | blank_state = blank_off; |
2759 | vesa_powerdown(); |
2760 | |
2761 | } |
2762 | return; |
2763 | } |
2764 | if (blank_state != blank_normal_wait) |
2765 | return; |
2766 | blank_state = blank_off; |
2767 | |
2768 | /* entering graphics mode? */ |
2769 | if (entering_gfx) { |
2770 | hide_cursor(vc); |
2771 | save_screen(vc); |
2772 | vc->vc_sw->con_blank(vc, -1, 1); |
2773 | console_blanked = fg_console + 1; |
2774 | set_origin(vc); |
2775 | return; |
2776 | } |
2777 | |
2778 | /* don't blank graphics */ |
2779 | if (vc->vc_mode != KD_TEXT) { |
2780 | console_blanked = fg_console + 1; |
2781 | return; |
2782 | } |
2783 | |
2784 | hide_cursor(vc); |
2785 | del_timer_sync(&console_timer); |
2786 | blank_timer_expired = 0; |
2787 | |
2788 | save_screen(vc); |
2789 | /* In case we need to reset origin, blanking hook returns 1 */ |
2790 | i = vc->vc_sw->con_blank(vc, 1, 0); |
2791 | console_blanked = fg_console + 1; |
2792 | if (i) |
2793 | set_origin(vc); |
2794 | |
2795 | if (console_blank_hook && console_blank_hook(1)) |
2796 | return; |
2797 | |
2798 | if (vesa_off_interval) { |
2799 | blank_state = blank_vesa_wait, |
2800 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
2801 | } |
2802 | |
2803 | if (vesa_blank_mode) |
2804 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
2805 | } |
2806 | EXPORT_SYMBOL(do_blank_screen); |
2807 | |
2808 | /* |
2809 | * Called by timer as well as from vt_console_driver |
2810 | */ |
2811 | void do_unblank_screen(int leaving_gfx) |
2812 | { |
2813 | struct vc_data *vc; |
2814 | |
2815 | /* This should now always be called from a "sane" (read: can schedule) |
2816 | * context for the sake of the low level drivers, except in the special |
2817 | * case of oops_in_progress |
2818 | */ |
2819 | if (!oops_in_progress) |
2820 | might_sleep(); |
2821 | |
2822 | WARN_CONSOLE_UNLOCKED(); |
2823 | |
2824 | ignore_poke = 0; |
2825 | if (!console_blanked) |
2826 | return; |
2827 | if (!vc_cons_allocated(fg_console)) { |
2828 | /* impossible */ |
2829 | printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); |
2830 | return; |
2831 | } |
2832 | vc = vc_cons[fg_console].d; |
2833 | if (vc->vc_mode != KD_TEXT) |
2834 | return; /* but leave console_blanked != 0 */ |
2835 | |
2836 | if (blankinterval) { |
2837 | mod_timer(&console_timer, jiffies + blankinterval); |
2838 | blank_state = blank_normal_wait; |
2839 | } |
2840 | |
2841 | console_blanked = 0; |
2842 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) |
2843 | /* Low-level driver cannot restore -> do it ourselves */ |
2844 | update_screen(vc); |
2845 | if (console_blank_hook) |
2846 | console_blank_hook(0); |
2847 | set_palette(vc); |
2848 | set_cursor(vc); |
2849 | } |
2850 | EXPORT_SYMBOL(do_unblank_screen); |
2851 | |
2852 | /* |
2853 | * This is called by the outside world to cause a forced unblank, mostly for |
2854 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually |
2855 | * call it with 1 as an argument and so force a mode restore... that may kill |
2856 | * X or at least garbage the screen but would also make the Oops visible... |
2857 | */ |
2858 | void unblank_screen(void) |
2859 | { |
2860 | do_unblank_screen(0); |
2861 | } |
2862 | |
2863 | /* |
2864 | * We defer the timer blanking to work queue so it can take the console semaphore |
2865 | * (console operations can still happen at irq time, but only from printk which |
2866 | * has the console semaphore. Not perfect yet, but better than no locking |
2867 | */ |
2868 | static void blank_screen_t(unsigned long dummy) |
2869 | { |
2870 | blank_timer_expired = 1; |
2871 | schedule_work(&console_work); |
2872 | } |
2873 | |
2874 | void poke_blanked_console(void) |
2875 | { |
2876 | WARN_CONSOLE_UNLOCKED(); |
2877 | |
2878 | /* Add this so we quickly catch whoever might call us in a non |
2879 | * safe context. Nowadays, unblank_screen() isn't to be called in |
2880 | * atomic contexts and is allowed to schedule (with the special case |
2881 | * of oops_in_progress, but that isn't of any concern for this |
2882 | * function. --BenH. |
2883 | */ |
2884 | might_sleep(); |
2885 | |
2886 | /* This isn't perfectly race free, but a race here would be mostly harmless, |
2887 | * at worse, we'll do a spurrious blank and it's unlikely |
2888 | */ |
2889 | del_timer(&console_timer); |
2890 | blank_timer_expired = 0; |
2891 | |
2892 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) |
2893 | return; |
2894 | if (console_blanked) |
2895 | unblank_screen(); |
2896 | else if (blankinterval) { |
2897 | mod_timer(&console_timer, jiffies + blankinterval); |
2898 | blank_state = blank_normal_wait; |
2899 | } |
2900 | } |
2901 | |
2902 | /* |
2903 | * Palettes |
2904 | */ |
2905 | |
2906 | static void set_palette(struct vc_data *vc) |
2907 | { |
2908 | WARN_CONSOLE_UNLOCKED(); |
2909 | |
2910 | if (vc->vc_mode != KD_GRAPHICS) |
2911 | vc->vc_sw->con_set_palette(vc, color_table); |
2912 | } |
2913 | |
2914 | static int set_get_cmap(unsigned char __user *arg, int set) |
2915 | { |
2916 | int i, j, k; |
2917 | |
2918 | WARN_CONSOLE_UNLOCKED(); |
2919 | |
2920 | for (i = 0; i < 16; i++) |
2921 | if (set) { |
2922 | get_user(default_red[i], arg++); |
2923 | get_user(default_grn[i], arg++); |
2924 | get_user(default_blu[i], arg++); |
2925 | } else { |
2926 | put_user(default_red[i], arg++); |
2927 | put_user(default_grn[i], arg++); |
2928 | put_user(default_blu[i], arg++); |
2929 | } |
2930 | if (set) { |
2931 | for (i = 0; i < MAX_NR_CONSOLES; i++) |
2932 | if (vc_cons_allocated(i)) { |
2933 | for (j = k = 0; j < 16; j++) { |
2934 | vc_cons[i].d->vc_palette[k++] = default_red[j]; |
2935 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; |
2936 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; |
2937 | } |
2938 | set_palette(vc_cons[i].d); |
2939 | } |
2940 | } |
2941 | return 0; |
2942 | } |
2943 | |
2944 | /* |
2945 | * Load palette into the DAC registers. arg points to a colour |
2946 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. |
2947 | */ |
2948 | |
2949 | int con_set_cmap(unsigned char __user *arg) |
2950 | { |
2951 | int rc; |
2952 | |
2953 | acquire_console_sem(); |
2954 | rc = set_get_cmap (arg,1); |
2955 | release_console_sem(); |
2956 | |
2957 | return rc; |
2958 | } |
2959 | |
2960 | int con_get_cmap(unsigned char __user *arg) |
2961 | { |
2962 | int rc; |
2963 | |
2964 | acquire_console_sem(); |
2965 | rc = set_get_cmap (arg,0); |
2966 | release_console_sem(); |
2967 | |
2968 | return rc; |
2969 | } |
2970 | |
2971 | void reset_palette(struct vc_data *vc) |
2972 | { |
2973 | int j, k; |
2974 | for (j=k=0; j<16; j++) { |
2975 | vc->vc_palette[k++] = default_red[j]; |
2976 | vc->vc_palette[k++] = default_grn[j]; |
2977 | vc->vc_palette[k++] = default_blu[j]; |
2978 | } |
2979 | set_palette(vc); |
2980 | } |
2981 | |
2982 | /* |
2983 | * Font switching |
2984 | * |
2985 | * Currently we only support fonts up to 32 pixels wide, at a maximum height |
2986 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, |
2987 | * depending on width) reserved for each character which is kinda wasty, but |
2988 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It |
2989 | * is upto the actual low-level console-driver convert data into its favorite |
2990 | * format (maybe we should add a `fontoffset' field to the `display' |
2991 | * structure so we won't have to convert the fontdata all the time. |
2992 | * /Jes |
2993 | */ |
2994 | |
2995 | #define max_font_size 65536 |
2996 | |
2997 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) |
2998 | { |
2999 | struct console_font font; |
3000 | int rc = -EINVAL; |
3001 | int c; |
3002 | |
3003 | if (vc->vc_mode != KD_TEXT) |
3004 | return -EINVAL; |
3005 | |
3006 | if (op->data) { |
3007 | font.data = kmalloc(max_font_size, GFP_KERNEL); |
3008 | if (!font.data) |
3009 | return -ENOMEM; |
3010 | } else |
3011 | font.data = NULL; |
3012 | |
3013 | acquire_console_sem(); |
3014 | if (vc->vc_sw->con_font_get) |
3015 | rc = vc->vc_sw->con_font_get(vc, &font); |
3016 | else |
3017 | rc = -ENOSYS; |
3018 | release_console_sem(); |
3019 | |
3020 | if (rc) |
3021 | goto out; |
3022 | |
3023 | c = (font.width+7)/8 * 32 * font.charcount; |
3024 | |
3025 | if (op->data && font.charcount > op->charcount) |
3026 | rc = -ENOSPC; |
3027 | if (!(op->flags & KD_FONT_FLAG_OLD)) { |
3028 | if (font.width > op->width || font.height > op->height) |
3029 | rc = -ENOSPC; |
3030 | } else { |
3031 | if (font.width != 8) |
3032 | rc = -EIO; |
3033 | else if ((op->height && font.height > op->height) || |
3034 | font.height > 32) |
3035 | rc = -ENOSPC; |
3036 | } |
3037 | if (rc) |
3038 | goto out; |
3039 | |
3040 | op->height = font.height; |
3041 | op->width = font.width; |
3042 | op->charcount = font.charcount; |
3043 | |
3044 | if (op->data && copy_to_user(op->data, font.data, c)) |
3045 | rc = -EFAULT; |
3046 | |
3047 | out: |
3048 | kfree(font.data); |
3049 | return rc; |
3050 | } |
3051 | |
3052 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) |
3053 | { |
3054 | struct console_font font; |
3055 | int rc = -EINVAL; |
3056 | int size; |
3057 | |
3058 | if (vc->vc_mode != KD_TEXT) |
3059 | return -EINVAL; |
3060 | if (!op->data) |
3061 | return -EINVAL; |
3062 | if (op->charcount > 512) |
3063 | return -EINVAL; |
3064 | if (!op->height) { /* Need to guess font height [compat] */ |
3065 | int h, i; |
3066 | u8 __user *charmap = op->data; |
3067 | u8 tmp; |
3068 | |
3069 | /* If from KDFONTOP ioctl, don't allow things which can be done in userland, |
3070 | so that we can get rid of this soon */ |
3071 | if (!(op->flags & KD_FONT_FLAG_OLD)) |
3072 | return -EINVAL; |
3073 | for (h = 32; h > 0; h--) |
3074 | for (i = 0; i < op->charcount; i++) { |
3075 | if (get_user(tmp, &charmap[32*i+h-1])) |
3076 | return -EFAULT; |
3077 | if (tmp) |
3078 | goto nonzero; |
3079 | } |
3080 | return -EINVAL; |
3081 | nonzero: |
3082 | op->height = h; |
3083 | } |
3084 | if (op->width <= 0 || op->width > 32 || op->height > 32) |
3085 | return -EINVAL; |
3086 | size = (op->width+7)/8 * 32 * op->charcount; |
3087 | if (size > max_font_size) |
3088 | return -ENOSPC; |
3089 | font.charcount = op->charcount; |
3090 | font.height = op->height; |
3091 | font.width = op->width; |
3092 | font.data = kmalloc(size, GFP_KERNEL); |
3093 | if (!font.data) |
3094 | return -ENOMEM; |
3095 | if (copy_from_user(font.data, op->data, size)) { |
3096 | kfree(font.data); |
3097 | return -EFAULT; |
3098 | } |
3099 | acquire_console_sem(); |
3100 | if (vc->vc_sw->con_font_set) |
3101 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
3102 | else |
3103 | rc = -ENOSYS; |
3104 | release_console_sem(); |
3105 | kfree(font.data); |
3106 | return rc; |
3107 | } |
3108 | |
3109 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) |
3110 | { |
3111 | struct console_font font = {.width = op->width, .height = op->height}; |
3112 | char name[MAX_FONT_NAME]; |
3113 | char *s = name; |
3114 | int rc; |
3115 | |
3116 | if (vc->vc_mode != KD_TEXT) |
3117 | return -EINVAL; |
3118 | |
3119 | if (!op->data) |
3120 | s = NULL; |
3121 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) |
3122 | return -EFAULT; |
3123 | else |
3124 | name[MAX_FONT_NAME - 1] = 0; |
3125 | |
3126 | acquire_console_sem(); |
3127 | if (vc->vc_sw->con_font_default) |
3128 | rc = vc->vc_sw->con_font_default(vc, &font, s); |
3129 | else |
3130 | rc = -ENOSYS; |
3131 | release_console_sem(); |
3132 | if (!rc) { |
3133 | op->width = font.width; |
3134 | op->height = font.height; |
3135 | } |
3136 | return rc; |
3137 | } |
3138 | |
3139 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) |
3140 | { |
3141 | int con = op->height; |
3142 | int rc; |
3143 | |
3144 | if (vc->vc_mode != KD_TEXT) |
3145 | return -EINVAL; |
3146 | |
3147 | acquire_console_sem(); |
3148 | if (!vc->vc_sw->con_font_copy) |
3149 | rc = -ENOSYS; |
3150 | else if (con < 0 || !vc_cons_allocated(con)) |
3151 | rc = -ENOTTY; |
3152 | else if (con == vc->vc_num) /* nothing to do */ |
3153 | rc = 0; |
3154 | else |
3155 | rc = vc->vc_sw->con_font_copy(vc, con); |
3156 | release_console_sem(); |
3157 | return rc; |
3158 | } |
3159 | |
3160 | int con_font_op(struct vc_data *vc, struct console_font_op *op) |
3161 | { |
3162 | switch (op->op) { |
3163 | case KD_FONT_OP_SET: |
3164 | return con_font_set(vc, op); |
3165 | case KD_FONT_OP_GET: |
3166 | return con_font_get(vc, op); |
3167 | case KD_FONT_OP_SET_DEFAULT: |
3168 | return con_font_default(vc, op); |
3169 | case KD_FONT_OP_COPY: |
3170 | return con_font_copy(vc, op); |
3171 | } |
3172 | return -ENOSYS; |
3173 | } |
3174 | |
3175 | /* |
3176 | * Interface exported to selection and vcs. |
3177 | */ |
3178 | |
3179 | /* used by selection */ |
3180 | u16 screen_glyph(struct vc_data *vc, int offset) |
3181 | { |
3182 | u16 w = scr_readw(screenpos(vc, offset, 1)); |
3183 | u16 c = w & 0xff; |
3184 | |
3185 | if (w & vc->vc_hi_font_mask) |
3186 | c |= 0x100; |
3187 | return c; |
3188 | } |
3189 | |
3190 | /* used by vcs - note the word offset */ |
3191 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) |
3192 | { |
3193 | return screenpos(vc, 2 * w_offset, viewed); |
3194 | } |
3195 | |
3196 | void getconsxy(struct vc_data *vc, unsigned char *p) |
3197 | { |
3198 | p[0] = vc->vc_x; |
3199 | p[1] = vc->vc_y; |
3200 | } |
3201 | |
3202 | void putconsxy(struct vc_data *vc, unsigned char *p) |
3203 | { |
3204 | gotoxy(vc, p[0], p[1]); |
3205 | set_cursor(vc); |
3206 | } |
3207 | |
3208 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) |
3209 | { |
3210 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) |
3211 | return softcursor_original; |
3212 | return scr_readw(org); |
3213 | } |
3214 | |
3215 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) |
3216 | { |
3217 | scr_writew(val, org); |
3218 | if ((unsigned long)org == vc->vc_pos) { |
3219 | softcursor_original = -1; |
3220 | add_softcursor(vc); |
3221 | } |
3222 | } |
3223 | |
3224 | /* |
3225 | * Visible symbols for modules |
3226 | */ |
3227 | |
3228 | EXPORT_SYMBOL(color_table); |
3229 | EXPORT_SYMBOL(default_red); |
3230 | EXPORT_SYMBOL(default_grn); |
3231 | EXPORT_SYMBOL(default_blu); |
3232 | EXPORT_SYMBOL(update_region); |
3233 | EXPORT_SYMBOL(redraw_screen); |
3234 | EXPORT_SYMBOL(vc_resize); |
3235 | EXPORT_SYMBOL(fg_console); |
3236 | EXPORT_SYMBOL(console_blank_hook); |
3237 | EXPORT_SYMBOL(console_blanked); |
3238 | EXPORT_SYMBOL(vc_cons); |
3239 | #ifndef VT_SINGLE_DRIVER |
3240 | EXPORT_SYMBOL(take_over_console); |
3241 | EXPORT_SYMBOL(give_up_console); |
3242 | #endif |