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e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (C) 1991, 1992 Linus Torvalds |
4 | */ | |
5 | ||
6 | /* | |
7 | * Hopefully this will be a rather complete VT102 implementation. | |
8 | * | |
9 | * Beeping thanks to John T Kohl. | |
10 | * | |
11 | * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics | |
12 | * Chars, and VT100 enhancements by Peter MacDonald. | |
13 | * | |
14 | * Copy and paste function by Andrew Haylett, | |
15 | * some enhancements by Alessandro Rubini. | |
16 | * | |
17 | * Code to check for different video-cards mostly by Galen Hunt, | |
18 | * <g-hunt@ee.utah.edu> | |
19 | * | |
20 | * Rudimentary ISO 10646/Unicode/UTF-8 character set support by | |
21 | * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. | |
22 | * | |
23 | * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 | |
24 | * Resizing of consoles, aeb, 940926 | |
25 | * | |
26 | * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 | |
27 | * <poe@daimi.aau.dk> | |
28 | * | |
29 | * User-defined bell sound, new setterm control sequences and printk | |
30 | * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 | |
31 | * | |
32 | * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> | |
33 | * | |
34 | * Merge with the abstract console driver by Geert Uytterhoeven | |
35 | * <geert@linux-m68k.org>, Jan 1997. | |
36 | * | |
37 | * Original m68k console driver modifications by | |
38 | * | |
39 | * - Arno Griffioen <arno@usn.nl> | |
40 | * - David Carter <carter@cs.bris.ac.uk> | |
41 | * | |
42 | * The abstract console driver provides a generic interface for a text | |
43 | * console. It supports VGA text mode, frame buffer based graphical consoles | |
44 | * and special graphics processors that are only accessible through some | |
45 | * registers (e.g. a TMS340x0 GSP). | |
46 | * | |
47 | * The interface to the hardware is specified using a special structure | |
48 | * (struct consw) which contains function pointers to console operations | |
49 | * (see <linux/console.h> for more information). | |
50 | * | |
51 | * Support for changeable cursor shape | |
52 | * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 | |
53 | * | |
54 | * Ported to i386 and con_scrolldelta fixed | |
55 | * by Emmanuel Marty <core@ggi-project.org>, April 1998 | |
56 | * | |
57 | * Resurrected character buffers in videoram plus lots of other trickery | |
58 | * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 | |
59 | * | |
60 | * Removed old-style timers, introduced console_timer, made timer | |
e1f8e874 | 61 | * deletion SMP-safe. 17Jun00, Andrew Morton |
1da177e4 LT |
62 | * |
63 | * Removed console_lock, enabled interrupts across all console operations | |
64 | * 13 March 2001, Andrew Morton | |
d4328b40 AT |
65 | * |
66 | * Fixed UTF-8 mode so alternate charset modes always work according | |
67 | * to control sequences interpreted in do_con_trol function | |
68 | * preserving backward VT100 semigraphics compatibility, | |
69 | * malformed UTF sequences represented as sequences of replacement glyphs, | |
70 | * original codes or '?' as a last resort if replacement glyph is undefined | |
71 | * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 | |
1da177e4 LT |
72 | */ |
73 | ||
74 | #include <linux/module.h> | |
75 | #include <linux/types.h> | |
3f07c014 | 76 | #include <linux/sched/signal.h> |
1da177e4 LT |
77 | #include <linux/tty.h> |
78 | #include <linux/tty_flip.h> | |
79 | #include <linux/kernel.h> | |
80 | #include <linux/string.h> | |
81 | #include <linux/errno.h> | |
82 | #include <linux/kd.h> | |
83 | #include <linux/slab.h> | |
9a98e7a8 | 84 | #include <linux/vmalloc.h> |
1da177e4 LT |
85 | #include <linux/major.h> |
86 | #include <linux/mm.h> | |
87 | #include <linux/console.h> | |
88 | #include <linux/init.h> | |
c831c338 | 89 | #include <linux/mutex.h> |
1da177e4 LT |
90 | #include <linux/vt_kern.h> |
91 | #include <linux/selection.h> | |
92 | #include <linux/tiocl.h> | |
93 | #include <linux/kbd_kern.h> | |
94 | #include <linux/consolemap.h> | |
95 | #include <linux/timer.h> | |
96 | #include <linux/interrupt.h> | |
1da177e4 | 97 | #include <linux/workqueue.h> |
1da177e4 LT |
98 | #include <linux/pm.h> |
99 | #include <linux/font.h> | |
100 | #include <linux/bitops.h> | |
b293d758 | 101 | #include <linux/notifier.h> |
d81ed103 AC |
102 | #include <linux/device.h> |
103 | #include <linux/io.h> | |
d81ed103 | 104 | #include <linux/uaccess.h> |
81d44507 | 105 | #include <linux/kdb.h> |
74c807ce | 106 | #include <linux/ctype.h> |
f0a8d84f | 107 | #include <linux/bsearch.h> |
d541ae4e | 108 | #include <linux/gcd.h> |
1da177e4 | 109 | |
3e795de7 | 110 | #define MAX_NR_CON_DRIVER 16 |
1da177e4 | 111 | |
6db4063c | 112 | #define CON_DRIVER_FLAG_MODULE 1 |
928e964f AD |
113 | #define CON_DRIVER_FLAG_INIT 2 |
114 | #define CON_DRIVER_FLAG_ATTR 4 | |
d364b5c3 | 115 | #define CON_DRIVER_FLAG_ZOMBIE 8 |
3e795de7 AD |
116 | |
117 | struct con_driver { | |
118 | const struct consw *con; | |
119 | const char *desc; | |
805952a8 | 120 | struct device *dev; |
6db4063c | 121 | int node; |
3e795de7 AD |
122 | int first; |
123 | int last; | |
124 | int flag; | |
125 | }; | |
126 | ||
127 | static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; | |
1da177e4 LT |
128 | const struct consw *conswitchp; |
129 | ||
130 | /* A bitmap for codes <32. A bit of 1 indicates that the code | |
131 | * corresponding to that bit number invokes some special action | |
132 | * (such as cursor movement) and should not be displayed as a | |
133 | * glyph unless the disp_ctrl mode is explicitly enabled. | |
134 | */ | |
135 | #define CTRL_ACTION 0x0d00ff81 | |
136 | #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ | |
137 | ||
138 | /* | |
139 | * Here is the default bell parameters: 750HZ, 1/8th of a second | |
140 | */ | |
141 | #define DEFAULT_BELL_PITCH 750 | |
142 | #define DEFAULT_BELL_DURATION (HZ/8) | |
bd63364c | 143 | #define DEFAULT_CURSOR_BLINK_MS 200 |
1da177e4 | 144 | |
1da177e4 LT |
145 | struct vc vc_cons [MAX_NR_CONSOLES]; |
146 | ||
147 | #ifndef VT_SINGLE_DRIVER | |
148 | static const struct consw *con_driver_map[MAX_NR_CONSOLES]; | |
149 | #endif | |
150 | ||
151 | static int con_open(struct tty_struct *, struct file *); | |
152 | static void vc_init(struct vc_data *vc, unsigned int rows, | |
153 | unsigned int cols, int do_clear); | |
154 | static void gotoxy(struct vc_data *vc, int new_x, int new_y); | |
155 | static void save_cur(struct vc_data *vc); | |
156 | static void reset_terminal(struct vc_data *vc, int do_clear); | |
157 | static void con_flush_chars(struct tty_struct *tty); | |
403aac96 | 158 | static int set_vesa_blanking(char __user *p); |
1da177e4 LT |
159 | static void set_cursor(struct vc_data *vc); |
160 | static void hide_cursor(struct vc_data *vc); | |
65f27f38 | 161 | static void console_callback(struct work_struct *ignored); |
d364b5c3 | 162 | static void con_driver_unregister_callback(struct work_struct *ignored); |
24ed960a | 163 | static void blank_screen_t(struct timer_list *unused); |
1da177e4 LT |
164 | static void set_palette(struct vc_data *vc); |
165 | ||
52c40fca PH |
166 | #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1) |
167 | ||
1da177e4 | 168 | static int printable; /* Is console ready for printing? */ |
77bf2bab | 169 | int default_utf8 = true; |
042f10ec | 170 | module_param(default_utf8, int, S_IRUGO | S_IWUSR); |
f6c06b68 MG |
171 | int global_cursor_default = -1; |
172 | module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); | |
1da177e4 | 173 | |
9ea9a886 CL |
174 | static int cur_default = CUR_DEFAULT; |
175 | module_param(cur_default, int, S_IRUGO | S_IWUSR); | |
176 | ||
1da177e4 LT |
177 | /* |
178 | * ignore_poke: don't unblank the screen when things are typed. This is | |
179 | * mainly for the privacy of braille terminal users. | |
180 | */ | |
181 | static int ignore_poke; | |
182 | ||
183 | int do_poke_blanked_console; | |
184 | int console_blanked; | |
185 | ||
186 | static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ | |
1da177e4 | 187 | static int vesa_off_interval; |
a4199f5e | 188 | static int blankinterval; |
f324edc8 | 189 | core_param(consoleblank, blankinterval, int, 0444); |
1da177e4 | 190 | |
65f27f38 | 191 | static DECLARE_WORK(console_work, console_callback); |
d364b5c3 | 192 | static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback); |
1da177e4 LT |
193 | |
194 | /* | |
195 | * fg_console is the current virtual console, | |
196 | * last_console is the last used one, | |
197 | * want_console is the console we want to switch to, | |
b45cfba4 | 198 | * saved_* variants are for save/restore around kernel debugger enter/leave |
1da177e4 LT |
199 | */ |
200 | int fg_console; | |
201 | int last_console; | |
202 | int want_console = -1; | |
fed891c8 JW |
203 | static int saved_fg_console; |
204 | static int saved_last_console; | |
205 | static int saved_want_console; | |
206 | static int saved_vc_mode; | |
beed5336 | 207 | static int saved_console_blanked; |
1da177e4 LT |
208 | |
209 | /* | |
210 | * For each existing display, we have a pointer to console currently visible | |
211 | * on that display, allowing consoles other than fg_console to be refreshed | |
212 | * appropriately. Unless the low-level driver supplies its own display_fg | |
213 | * variable, we use this one for the "master display". | |
214 | */ | |
215 | static struct vc_data *master_display_fg; | |
216 | ||
217 | /* | |
218 | * Unfortunately, we need to delay tty echo when we're currently writing to the | |
219 | * console since the code is (and always was) not re-entrant, so we schedule | |
220 | * all flip requests to process context with schedule-task() and run it from | |
221 | * console_callback(). | |
222 | */ | |
223 | ||
224 | /* | |
225 | * For the same reason, we defer scrollback to the console callback. | |
226 | */ | |
227 | static int scrollback_delta; | |
228 | ||
229 | /* | |
230 | * Hook so that the power management routines can (un)blank | |
231 | * the console on our behalf. | |
232 | */ | |
233 | int (*console_blank_hook)(int); | |
234 | ||
1d27e3e2 | 235 | static DEFINE_TIMER(console_timer, blank_screen_t); |
1da177e4 LT |
236 | static int blank_state; |
237 | static int blank_timer_expired; | |
238 | enum { | |
239 | blank_off = 0, | |
240 | blank_normal_wait, | |
241 | blank_vesa_wait, | |
242 | }; | |
243 | ||
fbc92a34 KS |
244 | /* |
245 | * /sys/class/tty/tty0/ | |
246 | * | |
247 | * the attribute 'active' contains the name of the current vc | |
248 | * console and it supports poll() to detect vc switches | |
249 | */ | |
250 | static struct device *tty0dev; | |
251 | ||
b293d758 ST |
252 | /* |
253 | * Notifier list for console events. | |
254 | */ | |
255 | static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); | |
256 | ||
257 | int register_vt_notifier(struct notifier_block *nb) | |
258 | { | |
259 | return atomic_notifier_chain_register(&vt_notifier_list, nb); | |
260 | } | |
261 | EXPORT_SYMBOL_GPL(register_vt_notifier); | |
262 | ||
263 | int unregister_vt_notifier(struct notifier_block *nb) | |
264 | { | |
265 | return atomic_notifier_chain_unregister(&vt_notifier_list, nb); | |
266 | } | |
267 | EXPORT_SYMBOL_GPL(unregister_vt_notifier); | |
268 | ||
269 | static void notify_write(struct vc_data *vc, unsigned int unicode) | |
270 | { | |
502fcb79 | 271 | struct vt_notifier_param param = { .vc = vc, .c = unicode }; |
b293d758 ST |
272 | atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); |
273 | } | |
274 | ||
275 | static void notify_update(struct vc_data *vc) | |
276 | { | |
277 | struct vt_notifier_param param = { .vc = vc }; | |
278 | atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); | |
279 | } | |
1da177e4 LT |
280 | /* |
281 | * Low-Level Functions | |
282 | */ | |
283 | ||
6ca8dfd7 JS |
284 | static inline bool con_is_fg(const struct vc_data *vc) |
285 | { | |
286 | return vc->vc_num == fg_console; | |
287 | } | |
288 | ||
289 | static inline bool con_should_update(const struct vc_data *vc) | |
290 | { | |
291 | return con_is_visible(vc) && !console_blanked; | |
292 | } | |
1da177e4 LT |
293 | |
294 | static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) | |
295 | { | |
296 | unsigned short *p; | |
297 | ||
298 | if (!viewed) | |
299 | p = (unsigned short *)(vc->vc_origin + offset); | |
300 | else if (!vc->vc_sw->con_screen_pos) | |
301 | p = (unsigned short *)(vc->vc_visible_origin + offset); | |
302 | else | |
303 | p = vc->vc_sw->con_screen_pos(vc, offset); | |
304 | return p; | |
305 | } | |
306 | ||
e33ac1c1 | 307 | /* Called from the keyboard irq path.. */ |
1da177e4 LT |
308 | static inline void scrolldelta(int lines) |
309 | { | |
e33ac1c1 AC |
310 | /* FIXME */ |
311 | /* scrolldelta needs some kind of consistency lock, but the BKL was | |
312 | and still is not protecting versus the scheduled back end */ | |
1da177e4 LT |
313 | scrollback_delta += lines; |
314 | schedule_console_callback(); | |
315 | } | |
316 | ||
317 | void schedule_console_callback(void) | |
318 | { | |
319 | schedule_work(&console_work); | |
320 | } | |
321 | ||
d8ae7242 NP |
322 | /* |
323 | * Code to manage unicode-based screen buffers | |
324 | */ | |
325 | ||
326 | #ifdef NO_VC_UNI_SCREEN | |
327 | /* this disables and optimizes related code away at compile time */ | |
328 | #define get_vc_uniscr(vc) NULL | |
329 | #else | |
330 | #define get_vc_uniscr(vc) vc->vc_uni_screen | |
331 | #endif | |
332 | ||
0224080f NP |
333 | #define VC_UNI_SCREEN_DEBUG 0 |
334 | ||
d8ae7242 NP |
335 | typedef uint32_t char32_t; |
336 | ||
337 | /* | |
338 | * Our screen buffer is preceded by an array of line pointers so that | |
339 | * scrolling only implies some pointer shuffling. | |
340 | */ | |
341 | struct uni_screen { | |
342 | char32_t *lines[0]; | |
343 | }; | |
344 | ||
345 | static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) | |
346 | { | |
347 | struct uni_screen *uniscr; | |
348 | void *p; | |
349 | unsigned int memsize, i; | |
350 | ||
351 | /* allocate everything in one go */ | |
352 | memsize = cols * rows * sizeof(char32_t); | |
353 | memsize += rows * sizeof(char32_t *); | |
9a98e7a8 | 354 | p = vmalloc(memsize); |
d8ae7242 NP |
355 | if (!p) |
356 | return NULL; | |
357 | ||
358 | /* initial line pointers */ | |
359 | uniscr = p; | |
360 | p = uniscr->lines + rows; | |
361 | for (i = 0; i < rows; i++) { | |
362 | uniscr->lines[i] = p; | |
363 | p += cols * sizeof(char32_t); | |
364 | } | |
365 | return uniscr; | |
366 | } | |
367 | ||
57d38f26 NP |
368 | static void vc_uniscr_free(struct uni_screen *uniscr) |
369 | { | |
370 | vfree(uniscr); | |
371 | } | |
372 | ||
d8ae7242 NP |
373 | static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) |
374 | { | |
57d38f26 | 375 | vc_uniscr_free(vc->vc_uni_screen); |
d8ae7242 NP |
376 | vc->vc_uni_screen = new_uniscr; |
377 | } | |
378 | ||
379 | static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) | |
380 | { | |
381 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
382 | ||
383 | if (uniscr) | |
384 | uniscr->lines[vc->vc_y][vc->vc_x] = uc; | |
385 | } | |
386 | ||
387 | static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) | |
388 | { | |
389 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
390 | ||
391 | if (uniscr) { | |
392 | char32_t *ln = uniscr->lines[vc->vc_y]; | |
393 | unsigned int x = vc->vc_x, cols = vc->vc_cols; | |
394 | ||
395 | memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); | |
396 | memset32(&ln[x], ' ', nr); | |
397 | } | |
398 | } | |
399 | ||
400 | static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) | |
401 | { | |
402 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
403 | ||
404 | if (uniscr) { | |
405 | char32_t *ln = uniscr->lines[vc->vc_y]; | |
406 | unsigned int x = vc->vc_x, cols = vc->vc_cols; | |
407 | ||
408 | memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); | |
409 | memset32(&ln[cols - nr], ' ', nr); | |
410 | } | |
411 | } | |
412 | ||
413 | static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, | |
414 | unsigned int nr) | |
415 | { | |
416 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
417 | ||
418 | if (uniscr) { | |
419 | char32_t *ln = uniscr->lines[vc->vc_y]; | |
420 | ||
421 | memset32(&ln[x], ' ', nr); | |
422 | } | |
423 | } | |
424 | ||
425 | static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, | |
426 | unsigned int nr) | |
427 | { | |
428 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
429 | ||
430 | if (uniscr) { | |
431 | unsigned int cols = vc->vc_cols; | |
432 | ||
433 | while (nr--) | |
434 | memset32(uniscr->lines[y++], ' ', cols); | |
435 | } | |
436 | } | |
437 | ||
438 | static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, | |
439 | enum con_scroll dir, unsigned int nr) | |
440 | { | |
441 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
442 | ||
443 | if (uniscr) { | |
d541ae4e NP |
444 | unsigned int i, j, k, sz, d, clear; |
445 | ||
446 | sz = b - t; | |
447 | clear = b - nr; | |
448 | d = nr; | |
449 | if (dir == SM_DOWN) { | |
450 | clear = t; | |
451 | d = sz - nr; | |
452 | } | |
453 | for (i = 0; i < gcd(d, sz); i++) { | |
454 | char32_t *tmp = uniscr->lines[t + i]; | |
455 | j = i; | |
456 | while (1) { | |
457 | k = j + d; | |
458 | if (k >= sz) | |
459 | k -= sz; | |
460 | if (k == i) | |
461 | break; | |
462 | uniscr->lines[t + j] = uniscr->lines[t + k]; | |
463 | j = k; | |
464 | } | |
465 | uniscr->lines[t + j] = tmp; | |
d8ae7242 | 466 | } |
d8ae7242 NP |
467 | vc_uniscr_clear_lines(vc, clear, nr); |
468 | } | |
469 | } | |
470 | ||
471 | static void vc_uniscr_copy_area(struct uni_screen *dst, | |
472 | unsigned int dst_cols, | |
473 | unsigned int dst_rows, | |
474 | struct uni_screen *src, | |
475 | unsigned int src_cols, | |
476 | unsigned int src_top_row, | |
477 | unsigned int src_bot_row) | |
478 | { | |
479 | unsigned int dst_row = 0; | |
480 | ||
481 | if (!dst) | |
482 | return; | |
483 | ||
484 | while (src_top_row < src_bot_row) { | |
485 | char32_t *src_line = src->lines[src_top_row]; | |
486 | char32_t *dst_line = dst->lines[dst_row]; | |
487 | ||
488 | memcpy(dst_line, src_line, src_cols * sizeof(char32_t)); | |
489 | if (dst_cols - src_cols) | |
490 | memset32(dst_line + src_cols, ' ', dst_cols - src_cols); | |
491 | src_top_row++; | |
492 | dst_row++; | |
493 | } | |
494 | while (dst_row < dst_rows) { | |
495 | char32_t *dst_line = dst->lines[dst_row]; | |
496 | ||
497 | memset32(dst_line, ' ', dst_cols); | |
498 | dst_row++; | |
499 | } | |
500 | } | |
501 | ||
d21b0be2 NP |
502 | /* |
503 | * Called from vcs_read() to make sure unicode screen retrieval is possible. | |
504 | * This will initialize the unicode screen buffer if not already done. | |
505 | * This returns 0 if OK, or a negative error code otherwise. | |
506 | * In particular, -ENODATA is returned if the console is not in UTF-8 mode. | |
507 | */ | |
508 | int vc_uniscr_check(struct vc_data *vc) | |
509 | { | |
510 | struct uni_screen *uniscr; | |
511 | unsigned short *p; | |
512 | int x, y, mask; | |
513 | ||
514 | if (__is_defined(NO_VC_UNI_SCREEN)) | |
515 | return -EOPNOTSUPP; | |
516 | ||
517 | WARN_CONSOLE_UNLOCKED(); | |
518 | ||
519 | if (!vc->vc_utf) | |
520 | return -ENODATA; | |
521 | ||
522 | if (vc->vc_uni_screen) | |
523 | return 0; | |
524 | ||
525 | uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows); | |
526 | if (!uniscr) | |
527 | return -ENOMEM; | |
528 | ||
529 | /* | |
530 | * Let's populate it initially with (imperfect) reverse translation. | |
531 | * This is the next best thing we can do short of having it enabled | |
532 | * from the start even when no users rely on this functionality. True | |
533 | * unicode content will be available after a complete screen refresh. | |
534 | */ | |
535 | p = (unsigned short *)vc->vc_origin; | |
536 | mask = vc->vc_hi_font_mask | 0xff; | |
537 | for (y = 0; y < vc->vc_rows; y++) { | |
538 | char32_t *line = uniscr->lines[y]; | |
539 | for (x = 0; x < vc->vc_cols; x++) { | |
540 | u16 glyph = scr_readw(p++) & mask; | |
541 | line[x] = inverse_translate(vc, glyph, true); | |
542 | } | |
543 | } | |
544 | ||
545 | vc->vc_uni_screen = uniscr; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | /* | |
550 | * Called from vcs_read() to get the unicode data from the screen. | |
551 | * This must be preceded by a successful call to vc_uniscr_check() once | |
552 | * the console lock has been taken. | |
553 | */ | |
708d0bff | 554 | void vc_uniscr_copy_line(struct vc_data *vc, void *dest, int viewed, |
d21b0be2 NP |
555 | unsigned int row, unsigned int col, unsigned int nr) |
556 | { | |
557 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
708d0bff NP |
558 | int offset = row * vc->vc_size_row + col * 2; |
559 | unsigned long pos; | |
d21b0be2 NP |
560 | |
561 | BUG_ON(!uniscr); | |
708d0bff NP |
562 | |
563 | pos = (unsigned long)screenpos(vc, offset, viewed); | |
564 | if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { | |
565 | /* | |
566 | * Desired position falls in the main screen buffer. | |
567 | * However the actual row/col might be different if | |
568 | * scrollback is active. | |
569 | */ | |
570 | row = (pos - vc->vc_origin) / vc->vc_size_row; | |
571 | col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2; | |
572 | memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t)); | |
573 | } else { | |
574 | /* | |
575 | * Scrollback is active. For now let's simply backtranslate | |
576 | * the screen glyphs until the unicode screen buffer does | |
577 | * synchronize with console display drivers for a scrollback | |
578 | * buffer of its own. | |
579 | */ | |
580 | u16 *p = (u16 *)pos; | |
581 | int mask = vc->vc_hi_font_mask | 0xff; | |
582 | char32_t *uni_buf = dest; | |
583 | while (nr--) { | |
584 | u16 glyph = scr_readw(p++) & mask; | |
585 | *uni_buf++ = inverse_translate(vc, glyph, true); | |
586 | } | |
587 | } | |
d21b0be2 NP |
588 | } |
589 | ||
0224080f NP |
590 | /* this is for validation and debugging only */ |
591 | static void vc_uniscr_debug_check(struct vc_data *vc) | |
592 | { | |
593 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
594 | unsigned short *p; | |
595 | int x, y, mask; | |
596 | ||
597 | if (!VC_UNI_SCREEN_DEBUG || !uniscr) | |
598 | return; | |
599 | ||
600 | WARN_CONSOLE_UNLOCKED(); | |
601 | ||
602 | /* | |
603 | * Make sure our unicode screen translates into the same glyphs | |
604 | * as the actual screen. This is brutal indeed. | |
605 | */ | |
606 | p = (unsigned short *)vc->vc_origin; | |
607 | mask = vc->vc_hi_font_mask | 0xff; | |
608 | for (y = 0; y < vc->vc_rows; y++) { | |
609 | char32_t *line = uniscr->lines[y]; | |
610 | for (x = 0; x < vc->vc_cols; x++) { | |
611 | u16 glyph = scr_readw(p++) & mask; | |
612 | char32_t uc = line[x]; | |
613 | int tc = conv_uni_to_pc(vc, uc); | |
614 | if (tc == -4) | |
615 | tc = conv_uni_to_pc(vc, 0xfffd); | |
616 | if (tc == -4) | |
617 | tc = conv_uni_to_pc(vc, '?'); | |
618 | if (tc != glyph) | |
619 | pr_err_ratelimited( | |
620 | "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n", | |
621 | __func__, x, y, glyph, tc); | |
622 | } | |
623 | } | |
624 | } | |
625 | ||
d8ae7242 | 626 | |
89765b94 JS |
627 | static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, |
628 | enum con_scroll dir, unsigned int nr) | |
1da177e4 | 629 | { |
89765b94 | 630 | u16 *clear, *d, *s; |
1da177e4 | 631 | |
89765b94 | 632 | if (t + nr >= b) |
1da177e4 LT |
633 | nr = b - t - 1; |
634 | if (b > vc->vc_rows || t >= b || nr < 1) | |
635 | return; | |
d8ae7242 | 636 | vc_uniscr_scroll(vc, t, b, dir, nr); |
89765b94 | 637 | if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr)) |
1da177e4 | 638 | return; |
1da177e4 | 639 | |
89765b94 JS |
640 | s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t); |
641 | d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr)); | |
1da177e4 | 642 | |
89765b94 JS |
643 | if (dir == SM_UP) { |
644 | clear = s + (b - t - nr) * vc->vc_cols; | |
645 | swap(s, d); | |
646 | } | |
647 | scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); | |
648 | scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); | |
1da177e4 LT |
649 | } |
650 | ||
651 | static void do_update_region(struct vc_data *vc, unsigned long start, int count) | |
652 | { | |
1da177e4 LT |
653 | unsigned int xx, yy, offset; |
654 | u16 *p; | |
655 | ||
656 | p = (u16 *) start; | |
657 | if (!vc->vc_sw->con_getxy) { | |
658 | offset = (start - vc->vc_origin) / 2; | |
659 | xx = offset % vc->vc_cols; | |
660 | yy = offset / vc->vc_cols; | |
661 | } else { | |
662 | int nxx, nyy; | |
663 | start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); | |
664 | xx = nxx; yy = nyy; | |
665 | } | |
666 | for(;;) { | |
667 | u16 attrib = scr_readw(p) & 0xff00; | |
668 | int startx = xx; | |
669 | u16 *q = p; | |
670 | while (xx < vc->vc_cols && count) { | |
671 | if (attrib != (scr_readw(p) & 0xff00)) { | |
672 | if (p > q) | |
673 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
674 | startx = xx; | |
675 | q = p; | |
676 | attrib = scr_readw(p) & 0xff00; | |
677 | } | |
678 | p++; | |
679 | xx++; | |
680 | count--; | |
681 | } | |
682 | if (p > q) | |
683 | vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); | |
684 | if (!count) | |
685 | break; | |
686 | xx = 0; | |
687 | yy++; | |
688 | if (vc->vc_sw->con_getxy) { | |
689 | p = (u16 *)start; | |
690 | start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); | |
691 | } | |
692 | } | |
1da177e4 LT |
693 | } |
694 | ||
695 | void update_region(struct vc_data *vc, unsigned long start, int count) | |
696 | { | |
697 | WARN_CONSOLE_UNLOCKED(); | |
698 | ||
6ca8dfd7 | 699 | if (con_should_update(vc)) { |
1da177e4 LT |
700 | hide_cursor(vc); |
701 | do_update_region(vc, start, count); | |
702 | set_cursor(vc); | |
703 | } | |
704 | } | |
705 | ||
706 | /* Structure of attributes is hardware-dependent */ | |
707 | ||
fa6ce9ab JE |
708 | static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, |
709 | u8 _underline, u8 _reverse, u8 _italic) | |
1da177e4 LT |
710 | { |
711 | if (vc->vc_sw->con_build_attr) | |
fa6ce9ab JE |
712 | return vc->vc_sw->con_build_attr(vc, _color, _intensity, |
713 | _blink, _underline, _reverse, _italic); | |
1da177e4 | 714 | |
1da177e4 LT |
715 | /* |
716 | * ++roman: I completely changed the attribute format for monochrome | |
717 | * mode (!can_do_color). The formerly used MDA (monochrome display | |
718 | * adapter) format didn't allow the combination of certain effects. | |
719 | * Now the attribute is just a bit vector: | |
720 | * Bit 0..1: intensity (0..2) | |
721 | * Bit 2 : underline | |
722 | * Bit 3 : reverse | |
723 | * Bit 7 : blink | |
724 | */ | |
725 | { | |
c9e587ab | 726 | u8 a = _color; |
1da177e4 LT |
727 | if (!vc->vc_can_do_color) |
728 | return _intensity | | |
fa6ce9ab | 729 | (_italic ? 2 : 0) | |
1da177e4 LT |
730 | (_underline ? 4 : 0) | |
731 | (_reverse ? 8 : 0) | | |
732 | (_blink ? 0x80 : 0); | |
fa6ce9ab JE |
733 | if (_italic) |
734 | a = (a & 0xF0) | vc->vc_itcolor; | |
735 | else if (_underline) | |
1da177e4 LT |
736 | a = (a & 0xf0) | vc->vc_ulcolor; |
737 | else if (_intensity == 0) | |
1c65a879 | 738 | a = (a & 0xf0) | vc->vc_halfcolor; |
1da177e4 LT |
739 | if (_reverse) |
740 | a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); | |
741 | if (_blink) | |
742 | a ^= 0x80; | |
743 | if (_intensity == 2) | |
744 | a ^= 0x08; | |
745 | if (vc->vc_hi_font_mask == 0x100) | |
746 | a <<= 1; | |
747 | return a; | |
748 | } | |
1da177e4 LT |
749 | } |
750 | ||
751 | static void update_attr(struct vc_data *vc) | |
752 | { | |
fa6ce9ab JE |
753 | vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, |
754 | vc->vc_blink, vc->vc_underline, | |
755 | vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); | |
756 | vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; | |
1da177e4 LT |
757 | } |
758 | ||
759 | /* Note: inverting the screen twice should revert to the original state */ | |
760 | void invert_screen(struct vc_data *vc, int offset, int count, int viewed) | |
761 | { | |
762 | unsigned short *p; | |
763 | ||
764 | WARN_CONSOLE_UNLOCKED(); | |
765 | ||
766 | count /= 2; | |
767 | p = screenpos(vc, offset, viewed); | |
6af39ed3 | 768 | if (vc->vc_sw->con_invert_region) { |
1da177e4 | 769 | vc->vc_sw->con_invert_region(vc, p, count); |
6af39ed3 | 770 | } else { |
1da177e4 LT |
771 | u16 *q = p; |
772 | int cnt = count; | |
773 | u16 a; | |
774 | ||
775 | if (!vc->vc_can_do_color) { | |
776 | while (cnt--) { | |
777 | a = scr_readw(q); | |
778 | a ^= 0x0800; | |
779 | scr_writew(a, q); | |
780 | q++; | |
781 | } | |
782 | } else if (vc->vc_hi_font_mask == 0x100) { | |
783 | while (cnt--) { | |
784 | a = scr_readw(q); | |
785 | a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); | |
786 | scr_writew(a, q); | |
787 | q++; | |
788 | } | |
789 | } else { | |
790 | while (cnt--) { | |
791 | a = scr_readw(q); | |
792 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); | |
793 | scr_writew(a, q); | |
794 | q++; | |
795 | } | |
796 | } | |
797 | } | |
6af39ed3 | 798 | |
6ca8dfd7 | 799 | if (con_should_update(vc)) |
1da177e4 | 800 | do_update_region(vc, (unsigned long) p, count); |
19e3ae6b | 801 | notify_update(vc); |
1da177e4 LT |
802 | } |
803 | ||
804 | /* used by selection: complement pointer position */ | |
805 | void complement_pos(struct vc_data *vc, int offset) | |
806 | { | |
414edcd3 | 807 | static int old_offset = -1; |
1da177e4 LT |
808 | static unsigned short old; |
809 | static unsigned short oldx, oldy; | |
810 | ||
811 | WARN_CONSOLE_UNLOCKED(); | |
812 | ||
414edcd3 AD |
813 | if (old_offset != -1 && old_offset >= 0 && |
814 | old_offset < vc->vc_screenbuf_size) { | |
815 | scr_writew(old, screenpos(vc, old_offset, 1)); | |
6ca8dfd7 | 816 | if (con_should_update(vc)) |
1da177e4 | 817 | vc->vc_sw->con_putc(vc, old, oldy, oldx); |
19e3ae6b | 818 | notify_update(vc); |
1da177e4 | 819 | } |
414edcd3 AD |
820 | |
821 | old_offset = offset; | |
822 | ||
823 | if (offset != -1 && offset >= 0 && | |
824 | offset < vc->vc_screenbuf_size) { | |
1da177e4 | 825 | unsigned short new; |
414edcd3 | 826 | unsigned short *p; |
1da177e4 LT |
827 | p = screenpos(vc, offset, 1); |
828 | old = scr_readw(p); | |
829 | new = old ^ vc->vc_complement_mask; | |
830 | scr_writew(new, p); | |
6ca8dfd7 | 831 | if (con_should_update(vc)) { |
1da177e4 LT |
832 | oldx = (offset >> 1) % vc->vc_cols; |
833 | oldy = (offset >> 1) / vc->vc_cols; | |
834 | vc->vc_sw->con_putc(vc, new, oldy, oldx); | |
835 | } | |
19e3ae6b | 836 | notify_update(vc); |
1da177e4 LT |
837 | } |
838 | } | |
839 | ||
840 | static void insert_char(struct vc_data *vc, unsigned int nr) | |
841 | { | |
81732c3b | 842 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 843 | |
d8ae7242 | 844 | vc_uniscr_insert(vc, nr); |
a883b70d | 845 | scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b | 846 | scr_memsetw(p, vc->vc_video_erase_char, nr * 2); |
1da177e4 | 847 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 848 | if (con_should_update(vc)) |
81732c3b | 849 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 850 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
851 | } |
852 | ||
853 | static void delete_char(struct vc_data *vc, unsigned int nr) | |
854 | { | |
81732c3b | 855 | unsigned short *p = (unsigned short *) vc->vc_pos; |
1da177e4 | 856 | |
d8ae7242 | 857 | vc_uniscr_delete(vc, nr); |
b1a925f4 | 858 | scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); |
81732c3b JFM |
859 | scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, |
860 | nr * 2); | |
1da177e4 | 861 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 862 | if (con_should_update(vc)) |
81732c3b | 863 | do_update_region(vc, (unsigned long) p, |
b1a925f4 | 864 | vc->vc_cols - vc->vc_x); |
1da177e4 LT |
865 | } |
866 | ||
e882f715 | 867 | static int softcursor_original = -1; |
1da177e4 LT |
868 | |
869 | static void add_softcursor(struct vc_data *vc) | |
870 | { | |
871 | int i = scr_readw((u16 *) vc->vc_pos); | |
872 | u32 type = vc->vc_cursor_type; | |
873 | ||
874 | if (! (type & 0x10)) return; | |
875 | if (softcursor_original != -1) return; | |
876 | softcursor_original = i; | |
877 | i |= ((type >> 8) & 0xff00 ); | |
878 | i ^= ((type) & 0xff00 ); | |
879 | if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; | |
880 | if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; | |
881 | scr_writew(i, (u16 *) vc->vc_pos); | |
6ca8dfd7 | 882 | if (con_should_update(vc)) |
1da177e4 LT |
883 | vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); |
884 | } | |
885 | ||
886 | static void hide_softcursor(struct vc_data *vc) | |
887 | { | |
888 | if (softcursor_original != -1) { | |
889 | scr_writew(softcursor_original, (u16 *)vc->vc_pos); | |
6ca8dfd7 | 890 | if (con_should_update(vc)) |
1da177e4 LT |
891 | vc->vc_sw->con_putc(vc, softcursor_original, |
892 | vc->vc_y, vc->vc_x); | |
893 | softcursor_original = -1; | |
894 | } | |
895 | } | |
896 | ||
897 | static void hide_cursor(struct vc_data *vc) | |
898 | { | |
dce05aa6 | 899 | if (vc_is_sel(vc)) |
1da177e4 | 900 | clear_selection(); |
dce05aa6 | 901 | |
1da177e4 LT |
902 | vc->vc_sw->con_cursor(vc, CM_ERASE); |
903 | hide_softcursor(vc); | |
904 | } | |
905 | ||
906 | static void set_cursor(struct vc_data *vc) | |
907 | { | |
6ca8dfd7 | 908 | if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS) |
1da177e4 LT |
909 | return; |
910 | if (vc->vc_deccm) { | |
dce05aa6 | 911 | if (vc_is_sel(vc)) |
1da177e4 LT |
912 | clear_selection(); |
913 | add_softcursor(vc); | |
914 | if ((vc->vc_cursor_type & 0x0f) != 1) | |
915 | vc->vc_sw->con_cursor(vc, CM_DRAW); | |
916 | } else | |
917 | hide_cursor(vc); | |
918 | } | |
919 | ||
920 | static void set_origin(struct vc_data *vc) | |
921 | { | |
922 | WARN_CONSOLE_UNLOCKED(); | |
923 | ||
6ca8dfd7 | 924 | if (!con_is_visible(vc) || |
1da177e4 LT |
925 | !vc->vc_sw->con_set_origin || |
926 | !vc->vc_sw->con_set_origin(vc)) | |
927 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; | |
928 | vc->vc_visible_origin = vc->vc_origin; | |
929 | vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; | |
930 | vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; | |
931 | } | |
932 | ||
c0f160a7 | 933 | static void save_screen(struct vc_data *vc) |
1da177e4 LT |
934 | { |
935 | WARN_CONSOLE_UNLOCKED(); | |
936 | ||
937 | if (vc->vc_sw->con_save_screen) | |
938 | vc->vc_sw->con_save_screen(vc); | |
939 | } | |
940 | ||
bcd375f7 MS |
941 | static void flush_scrollback(struct vc_data *vc) |
942 | { | |
943 | WARN_CONSOLE_UNLOCKED(); | |
944 | ||
a6dbe442 | 945 | set_origin(vc); |
3f4ef485 | 946 | if (vc->vc_sw->con_flush_scrollback) { |
bcd375f7 | 947 | vc->vc_sw->con_flush_scrollback(vc); |
3f4ef485 NP |
948 | } else if (con_is_visible(vc)) { |
949 | /* | |
950 | * When no con_flush_scrollback method is provided then the | |
951 | * legacy way for flushing the scrollback buffer is to use | |
952 | * a side effect of the con_switch method. We do it only on | |
953 | * the foreground console as background consoles have no | |
954 | * scrollback buffers in that case and we obviously don't | |
955 | * want to switch to them. | |
956 | */ | |
957 | hide_cursor(vc); | |
a6dbe442 | 958 | vc->vc_sw->con_switch(vc); |
3f4ef485 NP |
959 | set_cursor(vc); |
960 | } | |
bcd375f7 MS |
961 | } |
962 | ||
1da177e4 LT |
963 | /* |
964 | * Redrawing of screen | |
965 | */ | |
966 | ||
2a248307 | 967 | void clear_buffer_attributes(struct vc_data *vc) |
1da177e4 LT |
968 | { |
969 | unsigned short *p = (unsigned short *)vc->vc_origin; | |
970 | int count = vc->vc_screenbuf_size / 2; | |
971 | int mask = vc->vc_hi_font_mask | 0xff; | |
972 | ||
973 | for (; count > 0; count--, p++) { | |
974 | scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); | |
975 | } | |
976 | } | |
977 | ||
978 | void redraw_screen(struct vc_data *vc, int is_switch) | |
979 | { | |
980 | int redraw = 0; | |
981 | ||
982 | WARN_CONSOLE_UNLOCKED(); | |
983 | ||
984 | if (!vc) { | |
985 | /* strange ... */ | |
986 | /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ | |
987 | return; | |
988 | } | |
989 | ||
990 | if (is_switch) { | |
991 | struct vc_data *old_vc = vc_cons[fg_console].d; | |
992 | if (old_vc == vc) | |
993 | return; | |
6ca8dfd7 | 994 | if (!con_is_visible(vc)) |
1da177e4 LT |
995 | redraw = 1; |
996 | *vc->vc_display_fg = vc; | |
997 | fg_console = vc->vc_num; | |
998 | hide_cursor(old_vc); | |
6ca8dfd7 | 999 | if (!con_is_visible(old_vc)) { |
1da177e4 LT |
1000 | save_screen(old_vc); |
1001 | set_origin(old_vc); | |
1002 | } | |
fbc92a34 KS |
1003 | if (tty0dev) |
1004 | sysfs_notify(&tty0dev->kobj, NULL, "active"); | |
1da177e4 LT |
1005 | } else { |
1006 | hide_cursor(vc); | |
1007 | redraw = 1; | |
1008 | } | |
1009 | ||
1010 | if (redraw) { | |
1011 | int update; | |
1012 | int old_was_color = vc->vc_can_do_color; | |
1013 | ||
1014 | set_origin(vc); | |
1015 | update = vc->vc_sw->con_switch(vc); | |
1016 | set_palette(vc); | |
1017 | /* | |
1018 | * If console changed from mono<->color, the best we can do | |
1019 | * is to clear the buffer attributes. As it currently stands, | |
1020 | * rebuilding new attributes from the old buffer is not doable | |
1021 | * without overly complex code. | |
1022 | */ | |
1023 | if (old_was_color != vc->vc_can_do_color) { | |
1024 | update_attr(vc); | |
1025 | clear_buffer_attributes(vc); | |
1026 | } | |
8fd4bd22 | 1027 | |
8d7fc299 | 1028 | if (update && vc->vc_mode != KD_GRAPHICS) |
1da177e4 LT |
1029 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); |
1030 | } | |
1031 | set_cursor(vc); | |
1032 | if (is_switch) { | |
1033 | set_leds(); | |
1034 | compute_shiftstate(); | |
8182ec49 | 1035 | notify_update(vc); |
1da177e4 LT |
1036 | } |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Allocation, freeing and resizing of VTs. | |
1041 | */ | |
1042 | ||
1043 | int vc_cons_allocated(unsigned int i) | |
1044 | { | |
1045 | return (i < MAX_NR_CONSOLES && vc_cons[i].d); | |
1046 | } | |
1047 | ||
1048 | static void visual_init(struct vc_data *vc, int num, int init) | |
1049 | { | |
1050 | /* ++Geert: vc->vc_sw->con_init determines console size */ | |
1051 | if (vc->vc_sw) | |
1052 | module_put(vc->vc_sw->owner); | |
1053 | vc->vc_sw = conswitchp; | |
1054 | #ifndef VT_SINGLE_DRIVER | |
1055 | if (con_driver_map[num]) | |
1056 | vc->vc_sw = con_driver_map[num]; | |
1057 | #endif | |
1058 | __module_get(vc->vc_sw->owner); | |
1059 | vc->vc_num = num; | |
1060 | vc->vc_display_fg = &master_display_fg; | |
08b33249 DZ |
1061 | if (vc->vc_uni_pagedir_loc) |
1062 | con_free_unimap(vc); | |
1da177e4 | 1063 | vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; |
e4bdab70 | 1064 | vc->vc_uni_pagedir = NULL; |
1da177e4 LT |
1065 | vc->vc_hi_font_mask = 0; |
1066 | vc->vc_complement_mask = 0; | |
1067 | vc->vc_can_do_color = 0; | |
1b45996d | 1068 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
1069 | vc->vc_sw->con_init(vc, init); |
1070 | if (!vc->vc_complement_mask) | |
1071 | vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; | |
1072 | vc->vc_s_complement_mask = vc->vc_complement_mask; | |
1073 | vc->vc_size_row = vc->vc_cols << 1; | |
1074 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
1075 | } | |
1076 | ||
a1ad1cc9 GH |
1077 | |
1078 | static void visual_deinit(struct vc_data *vc) | |
1079 | { | |
1080 | vc->vc_sw->con_deinit(vc); | |
1081 | module_put(vc->vc_sw->owner); | |
1082 | } | |
1083 | ||
ca4463bf EB |
1084 | static void vc_port_destruct(struct tty_port *port) |
1085 | { | |
1086 | struct vc_data *vc = container_of(port, struct vc_data, port); | |
1087 | ||
1088 | kfree(vc); | |
1089 | } | |
1090 | ||
1091 | static const struct tty_port_operations vc_port_ops = { | |
1092 | .destruct = vc_port_destruct, | |
1093 | }; | |
1094 | ||
1da177e4 LT |
1095 | int vc_allocate(unsigned int currcons) /* return 0 on success */ |
1096 | { | |
34902b7f JS |
1097 | struct vt_notifier_param param; |
1098 | struct vc_data *vc; | |
1099 | ||
1da177e4 LT |
1100 | WARN_CONSOLE_UNLOCKED(); |
1101 | ||
1102 | if (currcons >= MAX_NR_CONSOLES) | |
1103 | return -ENXIO; | |
34902b7f JS |
1104 | |
1105 | if (vc_cons[currcons].d) | |
1106 | return 0; | |
1107 | ||
1108 | /* due to the granularity of kmalloc, we waste some memory here */ | |
1109 | /* the alloc is done in two steps, to optimize the common situation | |
1110 | of a 25x80 console (structsize=216, screenbuf_size=4000) */ | |
1111 | /* although the numbers above are not valid since long ago, the | |
1112 | point is still up-to-date and the comment still has its value | |
1113 | even if only as a historical artifact. --mj, July 1998 */ | |
1114 | param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); | |
1115 | if (!vc) | |
1da177e4 | 1116 | return -ENOMEM; |
34902b7f JS |
1117 | |
1118 | vc_cons[currcons].d = vc; | |
1119 | tty_port_init(&vc->port); | |
ca4463bf | 1120 | vc->port.ops = &vc_port_ops; |
34902b7f JS |
1121 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
1122 | ||
1123 | visual_init(vc, currcons, 1); | |
1124 | ||
1125 | if (!*vc->vc_uni_pagedir_loc) | |
1da177e4 | 1126 | con_set_default_unimap(vc); |
f6c06b68 | 1127 | |
21eff69a | 1128 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL); |
34902b7f JS |
1129 | if (!vc->vc_screenbuf) |
1130 | goto err_free; | |
1131 | ||
1132 | /* If no drivers have overridden us and the user didn't pass a | |
1133 | boot option, default to displaying the cursor */ | |
1134 | if (global_cursor_default == -1) | |
1135 | global_cursor_default = 1; | |
1136 | ||
1137 | vc_init(vc, vc->vc_rows, vc->vc_cols, 1); | |
1138 | vcs_make_sysfs(currcons); | |
1139 | atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); | |
f6c06b68 | 1140 | |
1da177e4 | 1141 | return 0; |
34902b7f | 1142 | err_free: |
a1ad1cc9 | 1143 | visual_deinit(vc); |
34902b7f JS |
1144 | kfree(vc); |
1145 | vc_cons[currcons].d = NULL; | |
1146 | return -ENOMEM; | |
1da177e4 LT |
1147 | } |
1148 | ||
e400b6ec AD |
1149 | static inline int resize_screen(struct vc_data *vc, int width, int height, |
1150 | int user) | |
1da177e4 LT |
1151 | { |
1152 | /* Resizes the resolution of the display adapater */ | |
1153 | int err = 0; | |
1154 | ||
1155 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) | |
e400b6ec AD |
1156 | err = vc->vc_sw->con_resize(vc, width, height, user); |
1157 | ||
1da177e4 LT |
1158 | return err; |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * Change # of rows and columns (0 means unchanged/the size of fg_console) | |
1163 | * [this is to be used together with some user program | |
1164 | * like resize that changes the hardware videomode] | |
1165 | */ | |
1166 | #define VC_RESIZE_MAXCOL (32767) | |
1167 | #define VC_RESIZE_MAXROW (32767) | |
8c9a9dd0 AC |
1168 | |
1169 | /** | |
1170 | * vc_do_resize - resizing method for the tty | |
1171 | * @tty: tty being resized | |
1172 | * @real_tty: real tty (different to tty if a pty/tty pair) | |
1173 | * @vc: virtual console private data | |
1174 | * @cols: columns | |
1175 | * @lines: lines | |
1176 | * | |
1177 | * Resize a virtual console, clipping according to the actual constraints. | |
1178 | * If the caller passes a tty structure then update the termios winsize | |
3ad2f3fb | 1179 | * information and perform any necessary signal handling. |
8c9a9dd0 | 1180 | * |
6a1c0680 | 1181 | * Caller must hold the console semaphore. Takes the termios rwsem and |
8c9a9dd0 AC |
1182 | * ctrl_lock of the tty IFF a tty is passed. |
1183 | */ | |
1184 | ||
fc6f6238 AC |
1185 | static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, |
1186 | unsigned int cols, unsigned int lines) | |
1da177e4 LT |
1187 | { |
1188 | unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; | |
9e0ba741 | 1189 | unsigned long end; |
d8ae7242 | 1190 | unsigned int old_rows, old_row_size, first_copied_row; |
1da177e4 | 1191 | unsigned int new_cols, new_rows, new_row_size, new_screen_size; |
9e0ba741 | 1192 | unsigned int user; |
1da177e4 | 1193 | unsigned short *newscreen; |
d8ae7242 | 1194 | struct uni_screen *new_uniscr = NULL; |
1da177e4 LT |
1195 | |
1196 | WARN_CONSOLE_UNLOCKED(); | |
1197 | ||
1198 | if (!vc) | |
1199 | return -ENXIO; | |
1200 | ||
e400b6ec AD |
1201 | user = vc->vc_resize_user; |
1202 | vc->vc_resize_user = 0; | |
1203 | ||
1da177e4 LT |
1204 | if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) |
1205 | return -EINVAL; | |
1206 | ||
1207 | new_cols = (cols ? cols : vc->vc_cols); | |
1208 | new_rows = (lines ? lines : vc->vc_rows); | |
1209 | new_row_size = new_cols << 1; | |
1210 | new_screen_size = new_row_size * new_rows; | |
1211 | ||
1212 | if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) | |
1213 | return 0; | |
1214 | ||
2717769e | 1215 | if (new_screen_size > KMALLOC_MAX_SIZE) |
32b2921e | 1216 | return -EINVAL; |
21eff69a | 1217 | newscreen = kzalloc(new_screen_size, GFP_USER); |
1da177e4 LT |
1218 | if (!newscreen) |
1219 | return -ENOMEM; | |
1220 | ||
d8ae7242 NP |
1221 | if (get_vc_uniscr(vc)) { |
1222 | new_uniscr = vc_uniscr_alloc(new_cols, new_rows); | |
1223 | if (!new_uniscr) { | |
1224 | kfree(newscreen); | |
1225 | return -ENOMEM; | |
1226 | } | |
1227 | } | |
1228 | ||
dce05aa6 | 1229 | if (vc_is_sel(vc)) |
009e39ae SD |
1230 | clear_selection(); |
1231 | ||
1da177e4 | 1232 | old_rows = vc->vc_rows; |
1da177e4 | 1233 | old_row_size = vc->vc_size_row; |
1da177e4 | 1234 | |
e400b6ec | 1235 | err = resize_screen(vc, new_cols, new_rows, user); |
1da177e4 LT |
1236 | if (err) { |
1237 | kfree(newscreen); | |
57d38f26 | 1238 | vc_uniscr_free(new_uniscr); |
1da177e4 LT |
1239 | return err; |
1240 | } | |
1241 | ||
1242 | vc->vc_rows = new_rows; | |
1243 | vc->vc_cols = new_cols; | |
1244 | vc->vc_size_row = new_row_size; | |
1245 | vc->vc_screenbuf_size = new_screen_size; | |
1246 | ||
1247 | rlth = min(old_row_size, new_row_size); | |
1248 | rrem = new_row_size - rlth; | |
1249 | old_origin = vc->vc_origin; | |
1250 | new_origin = (long) newscreen; | |
1251 | new_scr_end = new_origin + new_screen_size; | |
3b41dc1a AD |
1252 | |
1253 | if (vc->vc_y > new_rows) { | |
1254 | if (old_rows - vc->vc_y < new_rows) { | |
1255 | /* | |
1256 | * Cursor near the bottom, copy contents from the | |
1257 | * bottom of buffer | |
1258 | */ | |
d8ae7242 | 1259 | first_copied_row = (old_rows - new_rows); |
3b41dc1a AD |
1260 | } else { |
1261 | /* | |
1262 | * Cursor is in no man's land, copy 1/2 screenful | |
1263 | * from the top and bottom of cursor position | |
1264 | */ | |
d8ae7242 | 1265 | first_copied_row = (vc->vc_y - new_rows/2); |
3b41dc1a | 1266 | } |
d8ae7242 NP |
1267 | old_origin += first_copied_row * old_row_size; |
1268 | } else | |
1269 | first_copied_row = 0; | |
9fc2b2d0 | 1270 | end = old_origin + old_row_size * min(old_rows, new_rows); |
1da177e4 | 1271 | |
d8ae7242 NP |
1272 | vc_uniscr_copy_area(new_uniscr, new_cols, new_rows, |
1273 | get_vc_uniscr(vc), rlth/2, first_copied_row, | |
1274 | min(old_rows, new_rows)); | |
1275 | vc_uniscr_set(vc, new_uniscr); | |
1276 | ||
1da177e4 LT |
1277 | update_attr(vc); |
1278 | ||
3b41dc1a AD |
1279 | while (old_origin < end) { |
1280 | scr_memcpyw((unsigned short *) new_origin, | |
1281 | (unsigned short *) old_origin, rlth); | |
1da177e4 | 1282 | if (rrem) |
3b41dc1a AD |
1283 | scr_memsetw((void *)(new_origin + rlth), |
1284 | vc->vc_video_erase_char, rrem); | |
1da177e4 LT |
1285 | old_origin += old_row_size; |
1286 | new_origin += new_row_size; | |
1287 | } | |
1288 | if (new_scr_end > new_origin) | |
3b41dc1a AD |
1289 | scr_memsetw((void *)new_origin, vc->vc_video_erase_char, |
1290 | new_scr_end - new_origin); | |
5c9228f0 | 1291 | kfree(vc->vc_screenbuf); |
1da177e4 | 1292 | vc->vc_screenbuf = newscreen; |
1da177e4 LT |
1293 | vc->vc_screenbuf_size = new_screen_size; |
1294 | set_origin(vc); | |
1295 | ||
1296 | /* do part of a reset_terminal() */ | |
1297 | vc->vc_top = 0; | |
1298 | vc->vc_bottom = vc->vc_rows; | |
1299 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
1300 | save_cur(vc); | |
1301 | ||
8c9a9dd0 AC |
1302 | if (tty) { |
1303 | /* Rewrite the requested winsize data with the actual | |
1304 | resulting sizes */ | |
1305 | struct winsize ws; | |
1da177e4 LT |
1306 | memset(&ws, 0, sizeof(ws)); |
1307 | ws.ws_row = vc->vc_rows; | |
1308 | ws.ws_col = vc->vc_cols; | |
1309 | ws.ws_ypixel = vc->vc_scan_lines; | |
fc6f6238 | 1310 | tty_do_resize(tty, &ws); |
1da177e4 LT |
1311 | } |
1312 | ||
6ca8dfd7 | 1313 | if (con_is_visible(vc)) |
1da177e4 | 1314 | update_screen(vc); |
8b92e87d | 1315 | vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); |
0c9b1965 | 1316 | notify_update(vc); |
1da177e4 LT |
1317 | return err; |
1318 | } | |
1319 | ||
8c9a9dd0 AC |
1320 | /** |
1321 | * vc_resize - resize a VT | |
1322 | * @vc: virtual console | |
1323 | * @cols: columns | |
1324 | * @rows: rows | |
1325 | * | |
1326 | * Resize a virtual console as seen from the console end of things. We | |
1327 | * use the common vc_do_resize methods to update the structures. The | |
1328 | * caller must hold the console sem to protect console internals and | |
8ce73264 | 1329 | * vc->port.tty |
8c9a9dd0 AC |
1330 | */ |
1331 | ||
1332 | int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) | |
1333 | { | |
8ce73264 | 1334 | return vc_do_resize(vc->port.tty, vc, cols, rows); |
8c9a9dd0 AC |
1335 | } |
1336 | ||
1337 | /** | |
1338 | * vt_resize - resize a VT | |
1339 | * @tty: tty to resize | |
8c9a9dd0 AC |
1340 | * @ws: winsize attributes |
1341 | * | |
1342 | * Resize a virtual terminal. This is called by the tty layer as we | |
1343 | * register our own handler for resizing. The mutual helper does all | |
1344 | * the actual work. | |
1345 | * | |
1346 | * Takes the console sem and the called methods then take the tty | |
6a1c0680 | 1347 | * termios_rwsem and the tty ctrl_lock in that order. |
8c9a9dd0 | 1348 | */ |
da2bdf9a | 1349 | static int vt_resize(struct tty_struct *tty, struct winsize *ws) |
ca9bda00 | 1350 | { |
8c9a9dd0 AC |
1351 | struct vc_data *vc = tty->driver_data; |
1352 | int ret; | |
ca9bda00 | 1353 | |
ac751efa | 1354 | console_lock(); |
fc6f6238 | 1355 | ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); |
ac751efa | 1356 | console_unlock(); |
8c9a9dd0 | 1357 | return ret; |
ca9bda00 | 1358 | } |
1da177e4 | 1359 | |
421b40a6 | 1360 | struct vc_data *vc_deallocate(unsigned int currcons) |
1da177e4 | 1361 | { |
421b40a6 PH |
1362 | struct vc_data *vc = NULL; |
1363 | ||
1da177e4 LT |
1364 | WARN_CONSOLE_UNLOCKED(); |
1365 | ||
1366 | if (vc_cons_allocated(currcons)) { | |
421b40a6 | 1367 | struct vt_notifier_param param; |
4995f8ef | 1368 | |
421b40a6 | 1369 | param.vc = vc = vc_cons[currcons].d; |
b293d758 | 1370 | atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); |
4995f8ef | 1371 | vcs_remove_sysfs(currcons); |
a1ad1cc9 | 1372 | visual_deinit(vc); |
bde0d2c9 | 1373 | put_pid(vc->vt_pid); |
d8ae7242 | 1374 | vc_uniscr_set(vc, NULL); |
5c9228f0 | 1375 | kfree(vc->vc_screenbuf); |
1da177e4 LT |
1376 | vc_cons[currcons].d = NULL; |
1377 | } | |
421b40a6 | 1378 | return vc; |
1da177e4 LT |
1379 | } |
1380 | ||
1381 | /* | |
1382 | * VT102 emulator | |
1383 | */ | |
1384 | ||
2ff5c5a1 MH |
1385 | enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt}; |
1386 | ||
079c9534 AC |
1387 | #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) |
1388 | #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) | |
1389 | #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) | |
1da177e4 LT |
1390 | |
1391 | #define decarm VC_REPEAT | |
1392 | #define decckm VC_CKMODE | |
1393 | #define kbdapplic VC_APPLIC | |
1394 | #define lnm VC_CRLF | |
1395 | ||
1396 | /* | |
1397 | * this is what the terminal answers to a ESC-Z or csi0c query. | |
1398 | */ | |
1399 | #define VT100ID "\033[?1;2c" | |
1400 | #define VT102ID "\033[?6c" | |
1401 | ||
8ede5cce | 1402 | const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, |
1da177e4 LT |
1403 | 8,12,10,14, 9,13,11,15 }; |
1404 | ||
1405 | /* the default colour table, for VGA+ colour systems */ | |
91e74ca5 JS |
1406 | unsigned char default_red[] = { |
1407 | 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, | |
1408 | 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff | |
1409 | }; | |
1410 | module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR); | |
1411 | ||
1412 | unsigned char default_grn[] = { | |
1413 | 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa, | |
1414 | 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff | |
1415 | }; | |
1416 | module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR); | |
1417 | ||
1418 | unsigned char default_blu[] = { | |
1419 | 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, | |
1420 | 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff | |
1421 | }; | |
1422 | module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR); | |
1c2bbe6a | 1423 | |
1da177e4 LT |
1424 | /* |
1425 | * gotoxy() must verify all boundaries, because the arguments | |
1426 | * might also be negative. If the given position is out of | |
1427 | * bounds, the cursor is placed at the nearest margin. | |
1428 | */ | |
1429 | static void gotoxy(struct vc_data *vc, int new_x, int new_y) | |
1430 | { | |
1431 | int min_y, max_y; | |
1432 | ||
1433 | if (new_x < 0) | |
1434 | vc->vc_x = 0; | |
1435 | else { | |
1436 | if (new_x >= vc->vc_cols) | |
1437 | vc->vc_x = vc->vc_cols - 1; | |
1438 | else | |
1439 | vc->vc_x = new_x; | |
1440 | } | |
1441 | ||
1442 | if (vc->vc_decom) { | |
1443 | min_y = vc->vc_top; | |
1444 | max_y = vc->vc_bottom; | |
1445 | } else { | |
1446 | min_y = 0; | |
1447 | max_y = vc->vc_rows; | |
1448 | } | |
1449 | if (new_y < min_y) | |
1450 | vc->vc_y = min_y; | |
1451 | else if (new_y >= max_y) | |
1452 | vc->vc_y = max_y - 1; | |
1453 | else | |
1454 | vc->vc_y = new_y; | |
1455 | vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); | |
1456 | vc->vc_need_wrap = 0; | |
1457 | } | |
1458 | ||
1459 | /* for absolute user moves, when decom is set */ | |
1460 | static void gotoxay(struct vc_data *vc, int new_x, int new_y) | |
1461 | { | |
1462 | gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); | |
1463 | } | |
1464 | ||
1b0ec88a | 1465 | void scrollback(struct vc_data *vc) |
1da177e4 | 1466 | { |
1b0ec88a | 1467 | scrolldelta(-(vc->vc_rows / 2)); |
1da177e4 LT |
1468 | } |
1469 | ||
1470 | void scrollfront(struct vc_data *vc, int lines) | |
1471 | { | |
1472 | if (!lines) | |
1473 | lines = vc->vc_rows / 2; | |
1474 | scrolldelta(lines); | |
1475 | } | |
1476 | ||
1477 | static void lf(struct vc_data *vc) | |
1478 | { | |
1479 | /* don't scroll if above bottom of scrolling region, or | |
1480 | * if below scrolling region | |
1481 | */ | |
1482 | if (vc->vc_y + 1 == vc->vc_bottom) | |
89765b94 | 1483 | con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1); |
1da177e4 LT |
1484 | else if (vc->vc_y < vc->vc_rows - 1) { |
1485 | vc->vc_y++; | |
1486 | vc->vc_pos += vc->vc_size_row; | |
1487 | } | |
1488 | vc->vc_need_wrap = 0; | |
b293d758 | 1489 | notify_write(vc, '\n'); |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | static void ri(struct vc_data *vc) | |
1493 | { | |
1494 | /* don't scroll if below top of scrolling region, or | |
1495 | * if above scrolling region | |
1496 | */ | |
1497 | if (vc->vc_y == vc->vc_top) | |
89765b94 | 1498 | con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1); |
1da177e4 LT |
1499 | else if (vc->vc_y > 0) { |
1500 | vc->vc_y--; | |
1501 | vc->vc_pos -= vc->vc_size_row; | |
1502 | } | |
1503 | vc->vc_need_wrap = 0; | |
1504 | } | |
1505 | ||
1506 | static inline void cr(struct vc_data *vc) | |
1507 | { | |
1508 | vc->vc_pos -= vc->vc_x << 1; | |
1509 | vc->vc_need_wrap = vc->vc_x = 0; | |
b293d758 | 1510 | notify_write(vc, '\r'); |
1da177e4 LT |
1511 | } |
1512 | ||
1513 | static inline void bs(struct vc_data *vc) | |
1514 | { | |
1515 | if (vc->vc_x) { | |
1516 | vc->vc_pos -= 2; | |
1517 | vc->vc_x--; | |
1518 | vc->vc_need_wrap = 0; | |
b293d758 | 1519 | notify_write(vc, '\b'); |
1da177e4 LT |
1520 | } |
1521 | } | |
1522 | ||
1523 | static inline void del(struct vc_data *vc) | |
1524 | { | |
1525 | /* ignored */ | |
1526 | } | |
1527 | ||
1528 | static void csi_J(struct vc_data *vc, int vpar) | |
1529 | { | |
1530 | unsigned int count; | |
1531 | unsigned short * start; | |
1532 | ||
1533 | switch (vpar) { | |
1534 | case 0: /* erase from cursor to end of display */ | |
d8ae7242 NP |
1535 | vc_uniscr_clear_line(vc, vc->vc_x, |
1536 | vc->vc_cols - vc->vc_x); | |
1537 | vc_uniscr_clear_lines(vc, vc->vc_y + 1, | |
1538 | vc->vc_rows - vc->vc_y - 1); | |
1da177e4 LT |
1539 | count = (vc->vc_scr_end - vc->vc_pos) >> 1; |
1540 | start = (unsigned short *)vc->vc_pos; | |
1da177e4 LT |
1541 | break; |
1542 | case 1: /* erase from start to cursor */ | |
d8ae7242 NP |
1543 | vc_uniscr_clear_line(vc, 0, vc->vc_x + 1); |
1544 | vc_uniscr_clear_lines(vc, 0, vc->vc_y); | |
1da177e4 LT |
1545 | count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; |
1546 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 | 1547 | break; |
a6dbe442 NP |
1548 | case 3: /* include scrollback */ |
1549 | flush_scrollback(vc); | |
1550 | /* fallthrough */ | |
1da177e4 | 1551 | case 2: /* erase whole display */ |
d8ae7242 | 1552 | vc_uniscr_clear_lines(vc, 0, vc->vc_rows); |
1da177e4 LT |
1553 | count = vc->vc_cols * vc->vc_rows; |
1554 | start = (unsigned short *)vc->vc_origin; | |
1da177e4 LT |
1555 | break; |
1556 | default: | |
1557 | return; | |
1558 | } | |
1559 | scr_memsetw(start, vc->vc_video_erase_char, 2 * count); | |
b2ecf006 MP |
1560 | if (con_should_update(vc)) |
1561 | do_update_region(vc, (unsigned long) start, count); | |
1da177e4 LT |
1562 | vc->vc_need_wrap = 0; |
1563 | } | |
1564 | ||
1565 | static void csi_K(struct vc_data *vc, int vpar) | |
1566 | { | |
1567 | unsigned int count; | |
d8ae7242 NP |
1568 | unsigned short *start = (unsigned short *)vc->vc_pos; |
1569 | int offset; | |
1da177e4 LT |
1570 | |
1571 | switch (vpar) { | |
1572 | case 0: /* erase from cursor to end of line */ | |
d8ae7242 | 1573 | offset = 0; |
1da177e4 | 1574 | count = vc->vc_cols - vc->vc_x; |
1da177e4 LT |
1575 | break; |
1576 | case 1: /* erase from start of line to cursor */ | |
d8ae7242 | 1577 | offset = -vc->vc_x; |
1da177e4 | 1578 | count = vc->vc_x + 1; |
1da177e4 LT |
1579 | break; |
1580 | case 2: /* erase whole line */ | |
d8ae7242 | 1581 | offset = -vc->vc_x; |
1da177e4 | 1582 | count = vc->vc_cols; |
1da177e4 LT |
1583 | break; |
1584 | default: | |
1585 | return; | |
1586 | } | |
d8ae7242 NP |
1587 | vc_uniscr_clear_line(vc, vc->vc_x + offset, count); |
1588 | scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count); | |
1da177e4 | 1589 | vc->vc_need_wrap = 0; |
6ca8dfd7 | 1590 | if (con_should_update(vc)) |
943210ba | 1591 | do_update_region(vc, (unsigned long)(start + offset), count); |
1da177e4 LT |
1592 | } |
1593 | ||
1594 | static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ | |
1595 | { /* not vt100? */ | |
1596 | int count; | |
1597 | ||
1598 | if (!vpar) | |
1599 | vpar++; | |
1600 | count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; | |
1601 | ||
d8ae7242 | 1602 | vc_uniscr_clear_line(vc, vc->vc_x, count); |
1da177e4 | 1603 | scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); |
6ca8dfd7 | 1604 | if (con_should_update(vc)) |
1da177e4 LT |
1605 | vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); |
1606 | vc->vc_need_wrap = 0; | |
1607 | } | |
1608 | ||
1609 | static void default_attr(struct vc_data *vc) | |
1610 | { | |
1611 | vc->vc_intensity = 1; | |
fa6ce9ab | 1612 | vc->vc_italic = 0; |
1da177e4 LT |
1613 | vc->vc_underline = 0; |
1614 | vc->vc_reverse = 0; | |
1615 | vc->vc_blink = 0; | |
1616 | vc->vc_color = vc->vc_def_color; | |
1617 | } | |
1618 | ||
cec5b2a9 AB |
1619 | struct rgb { u8 r; u8 g; u8 b; }; |
1620 | ||
0f91e142 | 1621 | static void rgb_from_256(int i, struct rgb *c) |
cec5b2a9 | 1622 | { |
cec5b2a9 | 1623 | if (i < 8) { /* Standard colours. */ |
0f91e142 JS |
1624 | c->r = i&1 ? 0xaa : 0x00; |
1625 | c->g = i&2 ? 0xaa : 0x00; | |
1626 | c->b = i&4 ? 0xaa : 0x00; | |
cec5b2a9 | 1627 | } else if (i < 16) { |
0f91e142 JS |
1628 | c->r = i&1 ? 0xff : 0x55; |
1629 | c->g = i&2 ? 0xff : 0x55; | |
1630 | c->b = i&4 ? 0xff : 0x55; | |
cec5b2a9 | 1631 | } else if (i < 232) { /* 6x6x6 colour cube. */ |
0f91e142 JS |
1632 | c->r = (i - 16) / 36 * 85 / 2; |
1633 | c->g = (i - 16) / 6 % 6 * 85 / 2; | |
1634 | c->b = (i - 16) % 6 * 85 / 2; | |
cec5b2a9 | 1635 | } else /* Grayscale ramp. */ |
0f91e142 | 1636 | c->r = c->g = c->b = i * 10 - 2312; |
cec5b2a9 AB |
1637 | } |
1638 | ||
0f91e142 | 1639 | static void rgb_foreground(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 | 1640 | { |
193df022 JS |
1641 | u8 hue = 0, max = max3(c->r, c->g, c->b); |
1642 | ||
1643 | if (c->r > max / 2) | |
1644 | hue |= 4; | |
1645 | if (c->g > max / 2) | |
1646 | hue |= 2; | |
1647 | if (c->b > max / 2) | |
1648 | hue |= 1; | |
1649 | ||
1650 | if (hue == 7 && max <= 0x55) { | |
1651 | hue = 0; | |
1652 | vc->vc_intensity = 2; | |
1653 | } else if (max > 0xaa) | |
1654 | vc->vc_intensity = 2; | |
cec5b2a9 | 1655 | else |
193df022 JS |
1656 | vc->vc_intensity = 1; |
1657 | ||
cec5b2a9 AB |
1658 | vc->vc_color = (vc->vc_color & 0xf0) | hue; |
1659 | } | |
1660 | ||
0f91e142 | 1661 | static void rgb_background(struct vc_data *vc, const struct rgb *c) |
cec5b2a9 AB |
1662 | { |
1663 | /* For backgrounds, err on the dark side. */ | |
1664 | vc->vc_color = (vc->vc_color & 0x0f) | |
0f91e142 | 1665 | | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3; |
cec5b2a9 AB |
1666 | } |
1667 | ||
e05ab238 JS |
1668 | /* |
1669 | * ITU T.416 Higher colour modes. They break the usual properties of SGR codes | |
04afcd3a MH |
1670 | * and thus need to be detected and ignored by hand. That standard also |
1671 | * wants : rather than ; as separators but sequences containing : are currently | |
1672 | * completely ignored by the parser. | |
e05ab238 JS |
1673 | * |
1674 | * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in | |
1675 | * supporting them. | |
1676 | */ | |
1677 | static int vc_t416_color(struct vc_data *vc, int i, | |
0f91e142 | 1678 | void(*set_color)(struct vc_data *vc, const struct rgb *c)) |
e05ab238 | 1679 | { |
0f91e142 JS |
1680 | struct rgb c; |
1681 | ||
e05ab238 JS |
1682 | i++; |
1683 | if (i > vc->vc_npar) | |
1684 | return i; | |
1685 | ||
0bf1f4a8 | 1686 | if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) { |
3e7ec4a0 | 1687 | /* 256 colours */ |
e05ab238 | 1688 | i++; |
0f91e142 | 1689 | rgb_from_256(vc->vc_par[i], &c); |
669e0a51 | 1690 | } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) { |
3e7ec4a0 | 1691 | /* 24 bit */ |
0f91e142 JS |
1692 | c.r = vc->vc_par[i + 1]; |
1693 | c.g = vc->vc_par[i + 2]; | |
1694 | c.b = vc->vc_par[i + 3]; | |
e05ab238 | 1695 | i += 3; |
0f91e142 JS |
1696 | } else |
1697 | return i; | |
1698 | ||
1699 | set_color(vc, &c); | |
e05ab238 JS |
1700 | |
1701 | return i; | |
1702 | } | |
1703 | ||
ac751efa | 1704 | /* console_lock is held */ |
1da177e4 LT |
1705 | static void csi_m(struct vc_data *vc) |
1706 | { | |
1707 | int i; | |
1708 | ||
1709 | for (i = 0; i <= vc->vc_npar; i++) | |
1710 | switch (vc->vc_par[i]) { | |
aada0a34 JS |
1711 | case 0: /* all attributes off */ |
1712 | default_attr(vc); | |
1713 | break; | |
1714 | case 1: | |
1715 | vc->vc_intensity = 2; | |
1716 | break; | |
1717 | case 2: | |
1718 | vc->vc_intensity = 0; | |
1719 | break; | |
1720 | case 3: | |
1721 | vc->vc_italic = 1; | |
1722 | break; | |
65d9982d MF |
1723 | case 21: |
1724 | /* | |
1725 | * No console drivers support double underline, so | |
1726 | * convert it to a single underline. | |
1727 | */ | |
aada0a34 JS |
1728 | case 4: |
1729 | vc->vc_underline = 1; | |
1730 | break; | |
1731 | case 5: | |
1732 | vc->vc_blink = 1; | |
1733 | break; | |
1734 | case 7: | |
1735 | vc->vc_reverse = 1; | |
1736 | break; | |
1737 | case 10: /* ANSI X3.64-1979 (SCO-ish?) | |
1738 | * Select primary font, don't display control chars if | |
1739 | * defined, don't set bit 8 on output. | |
1740 | */ | |
1741 | vc->vc_translate = set_translate(vc->vc_charset == 0 | |
1742 | ? vc->vc_G0_charset | |
1743 | : vc->vc_G1_charset, vc); | |
1744 | vc->vc_disp_ctrl = 0; | |
1745 | vc->vc_toggle_meta = 0; | |
1746 | break; | |
1747 | case 11: /* ANSI X3.64-1979 (SCO-ish?) | |
1748 | * Select first alternate font, lets chars < 32 be | |
1749 | * displayed as ROM chars. | |
1750 | */ | |
1751 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1752 | vc->vc_disp_ctrl = 1; | |
1753 | vc->vc_toggle_meta = 0; | |
1754 | break; | |
1755 | case 12: /* ANSI X3.64-1979 (SCO-ish?) | |
1756 | * Select second alternate font, toggle high bit | |
1757 | * before displaying as ROM char. | |
1758 | */ | |
1759 | vc->vc_translate = set_translate(IBMPC_MAP, vc); | |
1760 | vc->vc_disp_ctrl = 1; | |
1761 | vc->vc_toggle_meta = 1; | |
1762 | break; | |
aada0a34 JS |
1763 | case 22: |
1764 | vc->vc_intensity = 1; | |
1765 | break; | |
1766 | case 23: | |
1767 | vc->vc_italic = 0; | |
1768 | break; | |
1769 | case 24: | |
1770 | vc->vc_underline = 0; | |
1771 | break; | |
1772 | case 25: | |
1773 | vc->vc_blink = 0; | |
1774 | break; | |
1775 | case 27: | |
1776 | vc->vc_reverse = 0; | |
1777 | break; | |
1778 | case 38: | |
1779 | i = vc_t416_color(vc, i, rgb_foreground); | |
1780 | break; | |
1781 | case 48: | |
1782 | i = vc_t416_color(vc, i, rgb_background); | |
1783 | break; | |
1784 | case 39: | |
1785 | vc->vc_color = (vc->vc_def_color & 0x0f) | | |
1786 | (vc->vc_color & 0xf0); | |
1787 | break; | |
1788 | case 49: | |
1789 | vc->vc_color = (vc->vc_def_color & 0xf0) | | |
1790 | (vc->vc_color & 0x0f); | |
1791 | break; | |
1792 | default: | |
fadb4244 AB |
1793 | if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) { |
1794 | if (vc->vc_par[i] < 100) | |
1795 | vc->vc_intensity = 2; | |
cc67dc28 AB |
1796 | vc->vc_par[i] -= 60; |
1797 | } | |
aada0a34 JS |
1798 | if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) |
1799 | vc->vc_color = color_table[vc->vc_par[i] - 30] | |
1800 | | (vc->vc_color & 0xf0); | |
1801 | else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) | |
1802 | vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) | |
1803 | | (vc->vc_color & 0x0f); | |
1804 | break; | |
1da177e4 LT |
1805 | } |
1806 | update_attr(vc); | |
1807 | } | |
1808 | ||
6732c8bb | 1809 | static void respond_string(const char *p, struct tty_port *port) |
1da177e4 LT |
1810 | { |
1811 | while (*p) { | |
6732c8bb | 1812 | tty_insert_flip_char(port, *p, 0); |
1da177e4 LT |
1813 | p++; |
1814 | } | |
6732c8bb | 1815 | tty_schedule_flip(port); |
1da177e4 LT |
1816 | } |
1817 | ||
1818 | static void cursor_report(struct vc_data *vc, struct tty_struct *tty) | |
1819 | { | |
1820 | char buf[40]; | |
1821 | ||
1822 | sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); | |
6732c8bb | 1823 | respond_string(buf, tty->port); |
1da177e4 LT |
1824 | } |
1825 | ||
1826 | static inline void status_report(struct tty_struct *tty) | |
1827 | { | |
6732c8bb | 1828 | respond_string("\033[0n", tty->port); /* Terminal ok */ |
1da177e4 LT |
1829 | } |
1830 | ||
6732c8bb | 1831 | static inline void respond_ID(struct tty_struct *tty) |
1da177e4 | 1832 | { |
6732c8bb | 1833 | respond_string(VT102ID, tty->port); |
1da177e4 LT |
1834 | } |
1835 | ||
1836 | void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) | |
1837 | { | |
1838 | char buf[8]; | |
1839 | ||
1840 | sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), | |
1841 | (char)('!' + mry)); | |
6732c8bb | 1842 | respond_string(buf, tty->port); |
1da177e4 LT |
1843 | } |
1844 | ||
496124e5 | 1845 | /* invoked via ioctl(TIOCLINUX) and through set_selection_user */ |
1da177e4 LT |
1846 | int mouse_reporting(void) |
1847 | { | |
1848 | return vc_cons[fg_console].d->vc_report_mouse; | |
1849 | } | |
1850 | ||
ac751efa | 1851 | /* console_lock is held */ |
1da177e4 LT |
1852 | static void set_mode(struct vc_data *vc, int on_off) |
1853 | { | |
1854 | int i; | |
1855 | ||
1856 | for (i = 0; i <= vc->vc_npar; i++) | |
2ff5c5a1 | 1857 | if (vc->vc_priv == EPdec) { |
1da177e4 LT |
1858 | switch(vc->vc_par[i]) { /* DEC private modes set/reset */ |
1859 | case 1: /* Cursor keys send ^[Ox/^[[x */ | |
1860 | if (on_off) | |
1861 | set_kbd(vc, decckm); | |
1862 | else | |
1863 | clr_kbd(vc, decckm); | |
1864 | break; | |
1865 | case 3: /* 80/132 mode switch unimplemented */ | |
1da177e4 LT |
1866 | #if 0 |
1867 | vc_resize(deccolm ? 132 : 80, vc->vc_rows); | |
1868 | /* this alone does not suffice; some user mode | |
1869 | utility has to change the hardware regs */ | |
1870 | #endif | |
1871 | break; | |
1872 | case 5: /* Inverted screen on/off */ | |
1873 | if (vc->vc_decscnm != on_off) { | |
1874 | vc->vc_decscnm = on_off; | |
1875 | invert_screen(vc, 0, vc->vc_screenbuf_size, 0); | |
1876 | update_attr(vc); | |
1877 | } | |
1878 | break; | |
1879 | case 6: /* Origin relative/absolute */ | |
1880 | vc->vc_decom = on_off; | |
1881 | gotoxay(vc, 0, 0); | |
1882 | break; | |
1883 | case 7: /* Autowrap on/off */ | |
1884 | vc->vc_decawm = on_off; | |
1885 | break; | |
1886 | case 8: /* Autorepeat on/off */ | |
1887 | if (on_off) | |
1888 | set_kbd(vc, decarm); | |
1889 | else | |
1890 | clr_kbd(vc, decarm); | |
1891 | break; | |
1892 | case 9: | |
1893 | vc->vc_report_mouse = on_off ? 1 : 0; | |
1894 | break; | |
1895 | case 25: /* Cursor on/off */ | |
1896 | vc->vc_deccm = on_off; | |
1897 | break; | |
1898 | case 1000: | |
1899 | vc->vc_report_mouse = on_off ? 2 : 0; | |
1900 | break; | |
1901 | } | |
1902 | } else { | |
1903 | switch(vc->vc_par[i]) { /* ANSI modes set/reset */ | |
1904 | case 3: /* Monitor (display ctrls) */ | |
1905 | vc->vc_disp_ctrl = on_off; | |
1906 | break; | |
1907 | case 4: /* Insert Mode on/off */ | |
1908 | vc->vc_decim = on_off; | |
1909 | break; | |
1910 | case 20: /* Lf, Enter == CrLf/Lf */ | |
1911 | if (on_off) | |
1912 | set_kbd(vc, lnm); | |
1913 | else | |
1914 | clr_kbd(vc, lnm); | |
1915 | break; | |
1916 | } | |
1917 | } | |
1918 | } | |
1919 | ||
ac751efa | 1920 | /* console_lock is held */ |
1da177e4 LT |
1921 | static void setterm_command(struct vc_data *vc) |
1922 | { | |
c3a834e8 JS |
1923 | switch (vc->vc_par[0]) { |
1924 | case 1: /* set color for underline mode */ | |
1925 | if (vc->vc_can_do_color && vc->vc_par[1] < 16) { | |
1926 | vc->vc_ulcolor = color_table[vc->vc_par[1]]; | |
1927 | if (vc->vc_underline) | |
1928 | update_attr(vc); | |
1929 | } | |
1930 | break; | |
1931 | case 2: /* set color for half intensity mode */ | |
1932 | if (vc->vc_can_do_color && vc->vc_par[1] < 16) { | |
1933 | vc->vc_halfcolor = color_table[vc->vc_par[1]]; | |
1934 | if (vc->vc_intensity == 0) | |
1935 | update_attr(vc); | |
1936 | } | |
1937 | break; | |
1938 | case 8: /* store colors as defaults */ | |
1939 | vc->vc_def_color = vc->vc_attr; | |
1940 | if (vc->vc_hi_font_mask == 0x100) | |
1941 | vc->vc_def_color >>= 1; | |
1942 | default_attr(vc); | |
1943 | update_attr(vc); | |
1944 | break; | |
1945 | case 9: /* set blanking interval */ | |
1946 | blankinterval = min(vc->vc_par[1], 60U) * 60; | |
1947 | poke_blanked_console(); | |
1948 | break; | |
1949 | case 10: /* set bell frequency in Hz */ | |
1950 | if (vc->vc_npar >= 1) | |
1951 | vc->vc_bell_pitch = vc->vc_par[1]; | |
1952 | else | |
1953 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
1954 | break; | |
1955 | case 11: /* set bell duration in msec */ | |
1956 | if (vc->vc_npar >= 1) | |
1957 | vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? | |
1958 | msecs_to_jiffies(vc->vc_par[1]) : 0; | |
1959 | else | |
1960 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
1961 | break; | |
1962 | case 12: /* bring specified console to the front */ | |
1963 | if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) | |
1964 | set_console(vc->vc_par[1] - 1); | |
1965 | break; | |
1966 | case 13: /* unblank the screen */ | |
1967 | poke_blanked_console(); | |
1968 | break; | |
1969 | case 14: /* set vesa powerdown interval */ | |
1970 | vesa_off_interval = min(vc->vc_par[1], 60U) * 60 * HZ; | |
1971 | break; | |
1972 | case 15: /* activate the previous console */ | |
1973 | set_console(last_console); | |
1974 | break; | |
1975 | case 16: /* set cursor blink duration in msec */ | |
1976 | if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && | |
1977 | vc->vc_par[1] <= USHRT_MAX) | |
1978 | vc->vc_cur_blink_ms = vc->vc_par[1]; | |
1979 | else | |
1980 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; | |
1981 | break; | |
1da177e4 LT |
1982 | } |
1983 | } | |
1984 | ||
ac751efa | 1985 | /* console_lock is held */ |
1da177e4 LT |
1986 | static void csi_at(struct vc_data *vc, unsigned int nr) |
1987 | { | |
1988 | if (nr > vc->vc_cols - vc->vc_x) | |
1989 | nr = vc->vc_cols - vc->vc_x; | |
1990 | else if (!nr) | |
1991 | nr = 1; | |
1992 | insert_char(vc, nr); | |
1993 | } | |
1994 | ||
ac751efa | 1995 | /* console_lock is held */ |
1da177e4 LT |
1996 | static void csi_L(struct vc_data *vc, unsigned int nr) |
1997 | { | |
1998 | if (nr > vc->vc_rows - vc->vc_y) | |
1999 | nr = vc->vc_rows - vc->vc_y; | |
2000 | else if (!nr) | |
2001 | nr = 1; | |
89765b94 | 2002 | con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_DOWN, nr); |
1da177e4 LT |
2003 | vc->vc_need_wrap = 0; |
2004 | } | |
2005 | ||
ac751efa | 2006 | /* console_lock is held */ |
1da177e4 LT |
2007 | static void csi_P(struct vc_data *vc, unsigned int nr) |
2008 | { | |
2009 | if (nr > vc->vc_cols - vc->vc_x) | |
2010 | nr = vc->vc_cols - vc->vc_x; | |
2011 | else if (!nr) | |
2012 | nr = 1; | |
2013 | delete_char(vc, nr); | |
2014 | } | |
2015 | ||
ac751efa | 2016 | /* console_lock is held */ |
1da177e4 LT |
2017 | static void csi_M(struct vc_data *vc, unsigned int nr) |
2018 | { | |
2019 | if (nr > vc->vc_rows - vc->vc_y) | |
2020 | nr = vc->vc_rows - vc->vc_y; | |
2021 | else if (!nr) | |
2022 | nr=1; | |
89765b94 | 2023 | con_scroll(vc, vc->vc_y, vc->vc_bottom, SM_UP, nr); |
1da177e4 LT |
2024 | vc->vc_need_wrap = 0; |
2025 | } | |
2026 | ||
ac751efa | 2027 | /* console_lock is held (except via vc_init->reset_terminal */ |
1da177e4 LT |
2028 | static void save_cur(struct vc_data *vc) |
2029 | { | |
2030 | vc->vc_saved_x = vc->vc_x; | |
2031 | vc->vc_saved_y = vc->vc_y; | |
2032 | vc->vc_s_intensity = vc->vc_intensity; | |
fa6ce9ab | 2033 | vc->vc_s_italic = vc->vc_italic; |
1da177e4 LT |
2034 | vc->vc_s_underline = vc->vc_underline; |
2035 | vc->vc_s_blink = vc->vc_blink; | |
2036 | vc->vc_s_reverse = vc->vc_reverse; | |
2037 | vc->vc_s_charset = vc->vc_charset; | |
2038 | vc->vc_s_color = vc->vc_color; | |
2039 | vc->vc_saved_G0 = vc->vc_G0_charset; | |
2040 | vc->vc_saved_G1 = vc->vc_G1_charset; | |
2041 | } | |
2042 | ||
ac751efa | 2043 | /* console_lock is held */ |
1da177e4 LT |
2044 | static void restore_cur(struct vc_data *vc) |
2045 | { | |
2046 | gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); | |
2047 | vc->vc_intensity = vc->vc_s_intensity; | |
fa6ce9ab | 2048 | vc->vc_italic = vc->vc_s_italic; |
1da177e4 LT |
2049 | vc->vc_underline = vc->vc_s_underline; |
2050 | vc->vc_blink = vc->vc_s_blink; | |
2051 | vc->vc_reverse = vc->vc_s_reverse; | |
2052 | vc->vc_charset = vc->vc_s_charset; | |
2053 | vc->vc_color = vc->vc_s_color; | |
2054 | vc->vc_G0_charset = vc->vc_saved_G0; | |
2055 | vc->vc_G1_charset = vc->vc_saved_G1; | |
2056 | vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); | |
2057 | update_attr(vc); | |
2058 | vc->vc_need_wrap = 0; | |
2059 | } | |
2060 | ||
b290af68 | 2061 | enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey, |
7a99565f | 2062 | EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd, |
63f3a16d | 2063 | ESpalette, ESosc }; |
1da177e4 | 2064 | |
ac751efa | 2065 | /* console_lock is held (except via vc_init()) */ |
1da177e4 LT |
2066 | static void reset_terminal(struct vc_data *vc, int do_clear) |
2067 | { | |
2068 | vc->vc_top = 0; | |
2069 | vc->vc_bottom = vc->vc_rows; | |
2070 | vc->vc_state = ESnormal; | |
2ff5c5a1 | 2071 | vc->vc_priv = EPecma; |
1da177e4 LT |
2072 | vc->vc_translate = set_translate(LAT1_MAP, vc); |
2073 | vc->vc_G0_charset = LAT1_MAP; | |
2074 | vc->vc_G1_charset = GRAF_MAP; | |
2075 | vc->vc_charset = 0; | |
2076 | vc->vc_need_wrap = 0; | |
2077 | vc->vc_report_mouse = 0; | |
042f10ec | 2078 | vc->vc_utf = default_utf8; |
1da177e4 LT |
2079 | vc->vc_utf_count = 0; |
2080 | ||
2081 | vc->vc_disp_ctrl = 0; | |
2082 | vc->vc_toggle_meta = 0; | |
2083 | ||
2084 | vc->vc_decscnm = 0; | |
2085 | vc->vc_decom = 0; | |
2086 | vc->vc_decawm = 1; | |
f6c06b68 | 2087 | vc->vc_deccm = global_cursor_default; |
1da177e4 LT |
2088 | vc->vc_decim = 0; |
2089 | ||
079c9534 | 2090 | vt_reset_keyboard(vc->vc_num); |
1da177e4 | 2091 | |
9ea9a886 | 2092 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
2093 | vc->vc_complement_mask = vc->vc_s_complement_mask; |
2094 | ||
2095 | default_attr(vc); | |
2096 | update_attr(vc); | |
2097 | ||
f1869a89 | 2098 | vc->vc_tab_stop[0] = |
1da177e4 LT |
2099 | vc->vc_tab_stop[1] = |
2100 | vc->vc_tab_stop[2] = | |
2101 | vc->vc_tab_stop[3] = | |
a564738c WK |
2102 | vc->vc_tab_stop[4] = |
2103 | vc->vc_tab_stop[5] = | |
2104 | vc->vc_tab_stop[6] = | |
2105 | vc->vc_tab_stop[7] = 0x01010101; | |
1da177e4 LT |
2106 | |
2107 | vc->vc_bell_pitch = DEFAULT_BELL_PITCH; | |
2108 | vc->vc_bell_duration = DEFAULT_BELL_DURATION; | |
bd63364c | 2109 | vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; |
1da177e4 LT |
2110 | |
2111 | gotoxy(vc, 0, 0); | |
2112 | save_cur(vc); | |
2113 | if (do_clear) | |
2114 | csi_J(vc, 2); | |
2115 | } | |
2116 | ||
ac751efa | 2117 | /* console_lock is held */ |
1da177e4 LT |
2118 | static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) |
2119 | { | |
2120 | /* | |
2121 | * Control characters can be used in the _middle_ | |
2122 | * of an escape sequence. | |
2123 | */ | |
63f3a16d AB |
2124 | if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */ |
2125 | return; | |
1da177e4 LT |
2126 | switch (c) { |
2127 | case 0: | |
2128 | return; | |
2129 | case 7: | |
63f3a16d AB |
2130 | if (vc->vc_state == ESosc) |
2131 | vc->vc_state = ESnormal; | |
2132 | else if (vc->vc_bell_duration) | |
1da177e4 LT |
2133 | kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); |
2134 | return; | |
2135 | case 8: | |
2136 | bs(vc); | |
2137 | return; | |
2138 | case 9: | |
2139 | vc->vc_pos -= (vc->vc_x << 1); | |
2140 | while (vc->vc_x < vc->vc_cols - 1) { | |
2141 | vc->vc_x++; | |
f1869a89 | 2142 | if (vc->vc_tab_stop[7 & (vc->vc_x >> 5)] & (1 << (vc->vc_x & 31))) |
1da177e4 LT |
2143 | break; |
2144 | } | |
2145 | vc->vc_pos += (vc->vc_x << 1); | |
b293d758 | 2146 | notify_write(vc, '\t'); |
1da177e4 LT |
2147 | return; |
2148 | case 10: case 11: case 12: | |
2149 | lf(vc); | |
2150 | if (!is_kbd(vc, lnm)) | |
2151 | return; | |
17504fd7 | 2152 | /* fall through */ |
1da177e4 LT |
2153 | case 13: |
2154 | cr(vc); | |
2155 | return; | |
2156 | case 14: | |
2157 | vc->vc_charset = 1; | |
2158 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2159 | vc->vc_disp_ctrl = 1; | |
2160 | return; | |
2161 | case 15: | |
2162 | vc->vc_charset = 0; | |
2163 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2164 | vc->vc_disp_ctrl = 0; | |
2165 | return; | |
2166 | case 24: case 26: | |
2167 | vc->vc_state = ESnormal; | |
2168 | return; | |
2169 | case 27: | |
2170 | vc->vc_state = ESesc; | |
2171 | return; | |
2172 | case 127: | |
2173 | del(vc); | |
2174 | return; | |
2175 | case 128+27: | |
2176 | vc->vc_state = ESsquare; | |
2177 | return; | |
2178 | } | |
2179 | switch(vc->vc_state) { | |
2180 | case ESesc: | |
2181 | vc->vc_state = ESnormal; | |
2182 | switch (c) { | |
2183 | case '[': | |
2184 | vc->vc_state = ESsquare; | |
2185 | return; | |
2186 | case ']': | |
2187 | vc->vc_state = ESnonstd; | |
2188 | return; | |
2189 | case '%': | |
2190 | vc->vc_state = ESpercent; | |
2191 | return; | |
2192 | case 'E': | |
2193 | cr(vc); | |
2194 | lf(vc); | |
2195 | return; | |
2196 | case 'M': | |
2197 | ri(vc); | |
2198 | return; | |
2199 | case 'D': | |
2200 | lf(vc); | |
2201 | return; | |
2202 | case 'H': | |
f1869a89 | 2203 | vc->vc_tab_stop[7 & (vc->vc_x >> 5)] |= (1 << (vc->vc_x & 31)); |
1da177e4 LT |
2204 | return; |
2205 | case 'Z': | |
2206 | respond_ID(tty); | |
2207 | return; | |
2208 | case '7': | |
2209 | save_cur(vc); | |
2210 | return; | |
2211 | case '8': | |
2212 | restore_cur(vc); | |
2213 | return; | |
2214 | case '(': | |
2215 | vc->vc_state = ESsetG0; | |
2216 | return; | |
2217 | case ')': | |
2218 | vc->vc_state = ESsetG1; | |
2219 | return; | |
2220 | case '#': | |
2221 | vc->vc_state = EShash; | |
2222 | return; | |
2223 | case 'c': | |
2224 | reset_terminal(vc, 1); | |
2225 | return; | |
2226 | case '>': /* Numeric keypad */ | |
2227 | clr_kbd(vc, kbdapplic); | |
2228 | return; | |
2229 | case '=': /* Appl. keypad */ | |
2230 | set_kbd(vc, kbdapplic); | |
2231 | return; | |
2232 | } | |
2233 | return; | |
2234 | case ESnonstd: | |
2235 | if (c=='P') { /* palette escape sequence */ | |
2236 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
2237 | vc->vc_par[vc->vc_npar] = 0; | |
2238 | vc->vc_npar = 0; | |
2239 | vc->vc_state = ESpalette; | |
2240 | return; | |
2241 | } else if (c=='R') { /* reset palette */ | |
2242 | reset_palette(vc); | |
2243 | vc->vc_state = ESnormal; | |
63f3a16d AB |
2244 | } else if (c>='0' && c<='9') |
2245 | vc->vc_state = ESosc; | |
2246 | else | |
1da177e4 LT |
2247 | vc->vc_state = ESnormal; |
2248 | return; | |
2249 | case ESpalette: | |
74c807ce AS |
2250 | if (isxdigit(c)) { |
2251 | vc->vc_par[vc->vc_npar++] = hex_to_bin(c); | |
1da177e4 LT |
2252 | if (vc->vc_npar == 7) { |
2253 | int i = vc->vc_par[0] * 3, j = 1; | |
2254 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
2255 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
2256 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
2257 | vc->vc_palette[i++] += vc->vc_par[j++]; | |
2258 | vc->vc_palette[i] = 16 * vc->vc_par[j++]; | |
2259 | vc->vc_palette[i] += vc->vc_par[j]; | |
2260 | set_palette(vc); | |
2261 | vc->vc_state = ESnormal; | |
2262 | } | |
2263 | } else | |
2264 | vc->vc_state = ESnormal; | |
2265 | return; | |
2266 | case ESsquare: | |
2267 | for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) | |
2268 | vc->vc_par[vc->vc_npar] = 0; | |
2269 | vc->vc_npar = 0; | |
2270 | vc->vc_state = ESgetpars; | |
2271 | if (c == '[') { /* Function key */ | |
2272 | vc->vc_state=ESfunckey; | |
2273 | return; | |
2274 | } | |
5445447b MH |
2275 | switch (c) { |
2276 | case '?': | |
2277 | vc->vc_priv = EPdec; | |
2278 | return; | |
2279 | case '>': | |
2280 | vc->vc_priv = EPgt; | |
2281 | return; | |
2282 | case '=': | |
2283 | vc->vc_priv = EPeq; | |
1da177e4 | 2284 | return; |
5445447b MH |
2285 | case '<': |
2286 | vc->vc_priv = EPlt; | |
2287 | return; | |
2288 | } | |
2289 | vc->vc_priv = EPecma; | |
17504fd7 | 2290 | /* fall through */ |
1da177e4 LT |
2291 | case ESgetpars: |
2292 | if (c == ';' && vc->vc_npar < NPAR - 1) { | |
2293 | vc->vc_npar++; | |
2294 | return; | |
2295 | } else if (c>='0' && c<='9') { | |
2296 | vc->vc_par[vc->vc_npar] *= 10; | |
2297 | vc->vc_par[vc->vc_npar] += c - '0'; | |
2298 | return; | |
b290af68 | 2299 | } |
04afcd3a | 2300 | if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */ |
7a99565f MH |
2301 | vc->vc_state = EScsiignore; |
2302 | return; | |
2303 | } | |
1da177e4 LT |
2304 | vc->vc_state = ESnormal; |
2305 | switch(c) { | |
2306 | case 'h': | |
5445447b MH |
2307 | if (vc->vc_priv <= EPdec) |
2308 | set_mode(vc, 1); | |
1da177e4 LT |
2309 | return; |
2310 | case 'l': | |
5445447b MH |
2311 | if (vc->vc_priv <= EPdec) |
2312 | set_mode(vc, 0); | |
1da177e4 LT |
2313 | return; |
2314 | case 'c': | |
2ff5c5a1 | 2315 | if (vc->vc_priv == EPdec) { |
1da177e4 LT |
2316 | if (vc->vc_par[0]) |
2317 | vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); | |
2318 | else | |
9ea9a886 | 2319 | vc->vc_cursor_type = cur_default; |
1da177e4 LT |
2320 | return; |
2321 | } | |
2322 | break; | |
2323 | case 'm': | |
2ff5c5a1 | 2324 | if (vc->vc_priv == EPdec) { |
1da177e4 LT |
2325 | clear_selection(); |
2326 | if (vc->vc_par[0]) | |
2327 | vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; | |
2328 | else | |
2329 | vc->vc_complement_mask = vc->vc_s_complement_mask; | |
2330 | return; | |
2331 | } | |
2332 | break; | |
2333 | case 'n': | |
2ff5c5a1 | 2334 | if (vc->vc_priv == EPecma) { |
1da177e4 LT |
2335 | if (vc->vc_par[0] == 5) |
2336 | status_report(tty); | |
2337 | else if (vc->vc_par[0] == 6) | |
2338 | cursor_report(vc, tty); | |
2339 | } | |
2340 | return; | |
2341 | } | |
2ff5c5a1 MH |
2342 | if (vc->vc_priv != EPecma) { |
2343 | vc->vc_priv = EPecma; | |
1da177e4 LT |
2344 | return; |
2345 | } | |
2346 | switch(c) { | |
2347 | case 'G': case '`': | |
2348 | if (vc->vc_par[0]) | |
2349 | vc->vc_par[0]--; | |
2350 | gotoxy(vc, vc->vc_par[0], vc->vc_y); | |
2351 | return; | |
2352 | case 'A': | |
2353 | if (!vc->vc_par[0]) | |
2354 | vc->vc_par[0]++; | |
2355 | gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); | |
2356 | return; | |
2357 | case 'B': case 'e': | |
2358 | if (!vc->vc_par[0]) | |
2359 | vc->vc_par[0]++; | |
2360 | gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); | |
2361 | return; | |
2362 | case 'C': case 'a': | |
2363 | if (!vc->vc_par[0]) | |
2364 | vc->vc_par[0]++; | |
2365 | gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); | |
2366 | return; | |
2367 | case 'D': | |
2368 | if (!vc->vc_par[0]) | |
2369 | vc->vc_par[0]++; | |
2370 | gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); | |
2371 | return; | |
2372 | case 'E': | |
2373 | if (!vc->vc_par[0]) | |
2374 | vc->vc_par[0]++; | |
2375 | gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); | |
2376 | return; | |
2377 | case 'F': | |
2378 | if (!vc->vc_par[0]) | |
2379 | vc->vc_par[0]++; | |
2380 | gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); | |
2381 | return; | |
2382 | case 'd': | |
2383 | if (vc->vc_par[0]) | |
2384 | vc->vc_par[0]--; | |
2385 | gotoxay(vc, vc->vc_x ,vc->vc_par[0]); | |
2386 | return; | |
2387 | case 'H': case 'f': | |
2388 | if (vc->vc_par[0]) | |
2389 | vc->vc_par[0]--; | |
2390 | if (vc->vc_par[1]) | |
2391 | vc->vc_par[1]--; | |
2392 | gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); | |
2393 | return; | |
2394 | case 'J': | |
2395 | csi_J(vc, vc->vc_par[0]); | |
2396 | return; | |
2397 | case 'K': | |
2398 | csi_K(vc, vc->vc_par[0]); | |
2399 | return; | |
2400 | case 'L': | |
2401 | csi_L(vc, vc->vc_par[0]); | |
2402 | return; | |
2403 | case 'M': | |
2404 | csi_M(vc, vc->vc_par[0]); | |
2405 | return; | |
2406 | case 'P': | |
2407 | csi_P(vc, vc->vc_par[0]); | |
2408 | return; | |
2409 | case 'c': | |
2410 | if (!vc->vc_par[0]) | |
2411 | respond_ID(tty); | |
2412 | return; | |
2413 | case 'g': | |
2414 | if (!vc->vc_par[0]) | |
f1869a89 | 2415 | vc->vc_tab_stop[7 & (vc->vc_x >> 5)] &= ~(1 << (vc->vc_x & 31)); |
1da177e4 LT |
2416 | else if (vc->vc_par[0] == 3) { |
2417 | vc->vc_tab_stop[0] = | |
2418 | vc->vc_tab_stop[1] = | |
2419 | vc->vc_tab_stop[2] = | |
2420 | vc->vc_tab_stop[3] = | |
a564738c WK |
2421 | vc->vc_tab_stop[4] = |
2422 | vc->vc_tab_stop[5] = | |
2423 | vc->vc_tab_stop[6] = | |
2424 | vc->vc_tab_stop[7] = 0; | |
1da177e4 LT |
2425 | } |
2426 | return; | |
2427 | case 'm': | |
2428 | csi_m(vc); | |
2429 | return; | |
2430 | case 'q': /* DECLL - but only 3 leds */ | |
2431 | /* map 0,1,2,3 to 0,1,2,4 */ | |
2432 | if (vc->vc_par[0] < 4) | |
079c9534 | 2433 | vt_set_led_state(vc->vc_num, |
1da177e4 LT |
2434 | (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); |
2435 | return; | |
2436 | case 'r': | |
2437 | if (!vc->vc_par[0]) | |
2438 | vc->vc_par[0]++; | |
2439 | if (!vc->vc_par[1]) | |
2440 | vc->vc_par[1] = vc->vc_rows; | |
2441 | /* Minimum allowed region is 2 lines */ | |
2442 | if (vc->vc_par[0] < vc->vc_par[1] && | |
2443 | vc->vc_par[1] <= vc->vc_rows) { | |
2444 | vc->vc_top = vc->vc_par[0] - 1; | |
2445 | vc->vc_bottom = vc->vc_par[1]; | |
2446 | gotoxay(vc, 0, 0); | |
2447 | } | |
2448 | return; | |
2449 | case 's': | |
2450 | save_cur(vc); | |
2451 | return; | |
2452 | case 'u': | |
2453 | restore_cur(vc); | |
2454 | return; | |
2455 | case 'X': | |
2456 | csi_X(vc, vc->vc_par[0]); | |
2457 | return; | |
2458 | case '@': | |
2459 | csi_at(vc, vc->vc_par[0]); | |
2460 | return; | |
2461 | case ']': /* setterm functions */ | |
2462 | setterm_command(vc); | |
2463 | return; | |
2464 | } | |
2465 | return; | |
7a99565f MH |
2466 | case EScsiignore: |
2467 | if (c >= 20 && c <= 0x3f) | |
2468 | return; | |
2469 | vc->vc_state = ESnormal; | |
2470 | return; | |
1da177e4 LT |
2471 | case ESpercent: |
2472 | vc->vc_state = ESnormal; | |
2473 | switch (c) { | |
2474 | case '@': /* defined in ISO 2022 */ | |
2475 | vc->vc_utf = 0; | |
2476 | return; | |
2477 | case 'G': /* prelim official escape code */ | |
2478 | case '8': /* retained for compatibility */ | |
2479 | vc->vc_utf = 1; | |
2480 | return; | |
2481 | } | |
2482 | return; | |
2483 | case ESfunckey: | |
2484 | vc->vc_state = ESnormal; | |
2485 | return; | |
2486 | case EShash: | |
2487 | vc->vc_state = ESnormal; | |
2488 | if (c == '8') { | |
2489 | /* DEC screen alignment test. kludge :-) */ | |
2490 | vc->vc_video_erase_char = | |
2491 | (vc->vc_video_erase_char & 0xff00) | 'E'; | |
2492 | csi_J(vc, 2); | |
2493 | vc->vc_video_erase_char = | |
2494 | (vc->vc_video_erase_char & 0xff00) | ' '; | |
2495 | do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); | |
2496 | } | |
2497 | return; | |
2498 | case ESsetG0: | |
2499 | if (c == '0') | |
2500 | vc->vc_G0_charset = GRAF_MAP; | |
2501 | else if (c == 'B') | |
2502 | vc->vc_G0_charset = LAT1_MAP; | |
2503 | else if (c == 'U') | |
2504 | vc->vc_G0_charset = IBMPC_MAP; | |
2505 | else if (c == 'K') | |
2506 | vc->vc_G0_charset = USER_MAP; | |
2507 | if (vc->vc_charset == 0) | |
2508 | vc->vc_translate = set_translate(vc->vc_G0_charset, vc); | |
2509 | vc->vc_state = ESnormal; | |
2510 | return; | |
2511 | case ESsetG1: | |
2512 | if (c == '0') | |
2513 | vc->vc_G1_charset = GRAF_MAP; | |
2514 | else if (c == 'B') | |
2515 | vc->vc_G1_charset = LAT1_MAP; | |
2516 | else if (c == 'U') | |
2517 | vc->vc_G1_charset = IBMPC_MAP; | |
2518 | else if (c == 'K') | |
2519 | vc->vc_G1_charset = USER_MAP; | |
2520 | if (vc->vc_charset == 1) | |
2521 | vc->vc_translate = set_translate(vc->vc_G1_charset, vc); | |
2522 | vc->vc_state = ESnormal; | |
2523 | return; | |
63f3a16d AB |
2524 | case ESosc: |
2525 | return; | |
1da177e4 LT |
2526 | default: |
2527 | vc->vc_state = ESnormal; | |
2528 | } | |
2529 | } | |
2530 | ||
2f1a2ccb | 2531 | /* is_double_width() is based on the wcwidth() implementation by |
1ed8a2b3 | 2532 | * Markus Kuhn -- 2007-05-26 (Unicode 5.0) |
2f1a2ccb EK |
2533 | * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c |
2534 | */ | |
2535 | struct interval { | |
2536 | uint32_t first; | |
2537 | uint32_t last; | |
2538 | }; | |
2539 | ||
f0a8d84f | 2540 | static int ucs_cmp(const void *key, const void *elt) |
2f1a2ccb | 2541 | { |
f0a8d84f TM |
2542 | uint32_t ucs = *(uint32_t *)key; |
2543 | struct interval e = *(struct interval *) elt; | |
2f1a2ccb | 2544 | |
f0a8d84f TM |
2545 | if (ucs > e.last) |
2546 | return 1; | |
2547 | else if (ucs < e.first) | |
2548 | return -1; | |
2f1a2ccb EK |
2549 | return 0; |
2550 | } | |
2551 | ||
2552 | static int is_double_width(uint32_t ucs) | |
2553 | { | |
2554 | static const struct interval double_width[] = { | |
2555 | { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, | |
2556 | { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, | |
1ed8a2b3 EK |
2557 | { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, |
2558 | { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } | |
2f1a2ccb | 2559 | }; |
f0a8d84f TM |
2560 | if (ucs < double_width[0].first || |
2561 | ucs > double_width[ARRAY_SIZE(double_width) - 1].last) | |
2562 | return 0; | |
2563 | ||
2564 | return bsearch(&ucs, double_width, ARRAY_SIZE(double_width), | |
2565 | sizeof(struct interval), ucs_cmp) != NULL; | |
2f1a2ccb EK |
2566 | } |
2567 | ||
d711ea8f JS |
2568 | static void con_flush(struct vc_data *vc, unsigned long draw_from, |
2569 | unsigned long draw_to, int *draw_x) | |
2570 | { | |
2571 | if (*draw_x < 0) | |
2572 | return; | |
2573 | ||
2574 | vc->vc_sw->con_putcs(vc, (u16 *)draw_from, | |
2575 | (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, *draw_x); | |
2576 | *draw_x = -1; | |
2577 | } | |
2578 | ||
ac751efa | 2579 | /* acquires console_lock */ |
1da177e4 LT |
2580 | static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) |
2581 | { | |
d8ae7242 | 2582 | int c, next_c, tc, ok, n = 0, draw_x = -1; |
1da177e4 LT |
2583 | unsigned int currcons; |
2584 | unsigned long draw_from = 0, draw_to = 0; | |
2585 | struct vc_data *vc; | |
2f1a2ccb | 2586 | unsigned char vc_attr; |
0341a4d0 | 2587 | struct vt_notifier_param param; |
2f1a2ccb EK |
2588 | uint8_t rescan; |
2589 | uint8_t inverse; | |
2590 | uint8_t width; | |
1da177e4 | 2591 | u16 himask, charmask; |
1da177e4 LT |
2592 | |
2593 | if (in_interrupt()) | |
2594 | return count; | |
2595 | ||
ac751efa | 2596 | console_lock(); |
1da177e4 LT |
2597 | vc = tty->driver_data; |
2598 | if (vc == NULL) { | |
bccf1da3 | 2599 | pr_err("vt: argh, driver_data is NULL !\n"); |
ac751efa | 2600 | console_unlock(); |
1da177e4 LT |
2601 | return 0; |
2602 | } | |
2603 | ||
2604 | currcons = vc->vc_num; | |
2605 | if (!vc_cons_allocated(currcons)) { | |
1ffdda95 MSB |
2606 | /* could this happen? */ |
2607 | pr_warn_once("con_write: tty %d not allocated\n", currcons+1); | |
2608 | console_unlock(); | |
2609 | return 0; | |
1da177e4 | 2610 | } |
1da177e4 | 2611 | |
1da177e4 LT |
2612 | himask = vc->vc_hi_font_mask; |
2613 | charmask = himask ? 0x1ff : 0xff; | |
2614 | ||
2615 | /* undraw cursor first */ | |
6ca8dfd7 | 2616 | if (con_is_fg(vc)) |
1da177e4 LT |
2617 | hide_cursor(vc); |
2618 | ||
0341a4d0 KD |
2619 | param.vc = vc; |
2620 | ||
1da177e4 LT |
2621 | while (!tty->stopped && count) { |
2622 | int orig = *buf; | |
2623 | c = orig; | |
2624 | buf++; | |
2625 | n++; | |
2626 | count--; | |
2f1a2ccb EK |
2627 | rescan = 0; |
2628 | inverse = 0; | |
2629 | width = 1; | |
1da177e4 LT |
2630 | |
2631 | /* Do no translation at all in control states */ | |
2632 | if (vc->vc_state != ESnormal) { | |
2633 | tc = c; | |
d4328b40 | 2634 | } else if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2f1a2ccb EK |
2635 | /* Combine UTF-8 into Unicode in vc_utf_char. |
2636 | * vc_utf_count is the number of continuation bytes still | |
2637 | * expected to arrive. | |
2638 | * vc_npar is the number of continuation bytes arrived so | |
2639 | * far | |
2640 | */ | |
d4328b40 | 2641 | rescan_last_byte: |
2f1a2ccb EK |
2642 | if ((c & 0xc0) == 0x80) { |
2643 | /* Continuation byte received */ | |
2644 | static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; | |
d4328b40 | 2645 | if (vc->vc_utf_count) { |
2f1a2ccb EK |
2646 | vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); |
2647 | vc->vc_npar++; | |
2648 | if (--vc->vc_utf_count) { | |
2649 | /* Still need some bytes */ | |
1da177e4 | 2650 | continue; |
2f1a2ccb EK |
2651 | } |
2652 | /* Got a whole character */ | |
2653 | c = vc->vc_utf_char; | |
2654 | /* Reject overlong sequences */ | |
2655 | if (c <= utf8_length_changes[vc->vc_npar - 1] || | |
2656 | c > utf8_length_changes[vc->vc_npar]) | |
2657 | c = 0xfffd; | |
2658 | } else { | |
2659 | /* Unexpected continuation byte */ | |
2660 | vc->vc_utf_count = 0; | |
2661 | c = 0xfffd; | |
2662 | } | |
1da177e4 | 2663 | } else { |
2f1a2ccb EK |
2664 | /* Single ASCII byte or first byte of a sequence received */ |
2665 | if (vc->vc_utf_count) { | |
2666 | /* Continuation byte expected */ | |
2667 | rescan = 1; | |
2668 | vc->vc_utf_count = 0; | |
2669 | c = 0xfffd; | |
2670 | } else if (c > 0x7f) { | |
2671 | /* First byte of a multibyte sequence received */ | |
2672 | vc->vc_npar = 0; | |
2673 | if ((c & 0xe0) == 0xc0) { | |
2674 | vc->vc_utf_count = 1; | |
2675 | vc->vc_utf_char = (c & 0x1f); | |
2676 | } else if ((c & 0xf0) == 0xe0) { | |
2677 | vc->vc_utf_count = 2; | |
2678 | vc->vc_utf_char = (c & 0x0f); | |
2679 | } else if ((c & 0xf8) == 0xf0) { | |
2680 | vc->vc_utf_count = 3; | |
2681 | vc->vc_utf_char = (c & 0x07); | |
2682 | } else if ((c & 0xfc) == 0xf8) { | |
2683 | vc->vc_utf_count = 4; | |
2684 | vc->vc_utf_char = (c & 0x03); | |
2685 | } else if ((c & 0xfe) == 0xfc) { | |
2686 | vc->vc_utf_count = 5; | |
2687 | vc->vc_utf_char = (c & 0x01); | |
2688 | } else { | |
2689 | /* 254 and 255 are invalid */ | |
2690 | c = 0xfffd; | |
2691 | } | |
2692 | if (vc->vc_utf_count) { | |
2693 | /* Still need some bytes */ | |
2694 | continue; | |
2695 | } | |
2696 | } | |
2697 | /* Nothing to do if an ASCII byte was received */ | |
1da177e4 | 2698 | } |
2f1a2ccb EK |
2699 | /* End of UTF-8 decoding. */ |
2700 | /* c is the received character, or U+FFFD for invalid sequences. */ | |
2701 | /* Replace invalid Unicode code points with U+FFFD too */ | |
2702 | if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) | |
2703 | c = 0xfffd; | |
2704 | tc = c; | |
d4328b40 | 2705 | } else { /* no utf or alternate charset mode */ |
a29ccf6f | 2706 | tc = vc_translate(vc, c); |
1da177e4 LT |
2707 | } |
2708 | ||
0341a4d0 KD |
2709 | param.c = tc; |
2710 | if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, | |
2711 | ¶m) == NOTIFY_STOP) | |
2712 | continue; | |
2713 | ||
1da177e4 LT |
2714 | /* If the original code was a control character we |
2715 | * only allow a glyph to be displayed if the code is | |
2716 | * not normally used (such as for cursor movement) or | |
2717 | * if the disp_ctrl mode has been explicitly enabled. | |
2718 | * Certain characters (as given by the CTRL_ALWAYS | |
2719 | * bitmap) are always displayed as control characters, | |
2720 | * as the console would be pretty useless without | |
2721 | * them; to display an arbitrary font position use the | |
2722 | * direct-to-font zone in UTF-8 mode. | |
2723 | */ | |
2724 | ok = tc && (c >= 32 || | |
d4328b40 AT |
2725 | !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : |
2726 | vc->vc_utf || ((CTRL_ACTION >> c) & 1))) | |
1da177e4 LT |
2727 | && (c != 127 || vc->vc_disp_ctrl) |
2728 | && (c != 128+27); | |
2729 | ||
2730 | if (vc->vc_state == ESnormal && ok) { | |
2f1a2ccb EK |
2731 | if (vc->vc_utf && !vc->vc_disp_ctrl) { |
2732 | if (is_double_width(c)) | |
2733 | width = 2; | |
2734 | } | |
1da177e4 LT |
2735 | /* Now try to find out how to display it */ |
2736 | tc = conv_uni_to_pc(vc, tc); | |
d4328b40 | 2737 | if (tc & ~charmask) { |
2f1a2ccb EK |
2738 | if (tc == -1 || tc == -2) { |
2739 | continue; /* nothing to display */ | |
2740 | } | |
2741 | /* Glyph not found */ | |
c0b79882 | 2742 | if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { |
2f1a2ccb | 2743 | /* In legacy mode use the glyph we get by a 1:1 mapping. |
1ed8a2b3 EK |
2744 | This would make absolutely no sense with Unicode in mind, |
2745 | but do this for ASCII characters since a font may lack | |
2746 | Unicode mapping info and we don't want to end up with | |
2747 | having question marks only. */ | |
2f1a2ccb EK |
2748 | tc = c; |
2749 | } else { | |
2750 | /* Display U+FFFD. If it's not found, display an inverse question mark. */ | |
2751 | tc = conv_uni_to_pc(vc, 0xfffd); | |
2752 | if (tc < 0) { | |
2753 | inverse = 1; | |
2754 | tc = conv_uni_to_pc(vc, '?'); | |
2755 | if (tc < 0) tc = '?'; | |
2756 | } | |
2757 | } | |
d4328b40 | 2758 | } |
1da177e4 | 2759 | |
2f1a2ccb EK |
2760 | if (!inverse) { |
2761 | vc_attr = vc->vc_attr; | |
1da177e4 | 2762 | } else { |
2f1a2ccb EK |
2763 | /* invert vc_attr */ |
2764 | if (!vc->vc_can_do_color) { | |
2765 | vc_attr = (vc->vc_attr) ^ 0x08; | |
2766 | } else if (vc->vc_hi_font_mask == 0x100) { | |
2767 | vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); | |
2768 | } else { | |
2769 | vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); | |
2770 | } | |
d711ea8f | 2771 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 | 2772 | } |
2f1a2ccb | 2773 | |
d8ae7242 | 2774 | next_c = c; |
2f1a2ccb EK |
2775 | while (1) { |
2776 | if (vc->vc_need_wrap || vc->vc_decim) | |
d711ea8f JS |
2777 | con_flush(vc, draw_from, draw_to, |
2778 | &draw_x); | |
2f1a2ccb EK |
2779 | if (vc->vc_need_wrap) { |
2780 | cr(vc); | |
2781 | lf(vc); | |
2782 | } | |
2783 | if (vc->vc_decim) | |
2784 | insert_char(vc, 1); | |
d8ae7242 | 2785 | vc_uniscr_putc(vc, next_c); |
2f1a2ccb EK |
2786 | scr_writew(himask ? |
2787 | ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : | |
2788 | (vc_attr << 8) + tc, | |
2789 | (u16 *) vc->vc_pos); | |
6ca8dfd7 | 2790 | if (con_should_update(vc) && draw_x < 0) { |
2f1a2ccb EK |
2791 | draw_x = vc->vc_x; |
2792 | draw_from = vc->vc_pos; | |
2793 | } | |
2794 | if (vc->vc_x == vc->vc_cols - 1) { | |
2795 | vc->vc_need_wrap = vc->vc_decawm; | |
2796 | draw_to = vc->vc_pos + 2; | |
2797 | } else { | |
2798 | vc->vc_x++; | |
2799 | draw_to = (vc->vc_pos += 2); | |
d4328b40 | 2800 | } |
2f1a2ccb EK |
2801 | |
2802 | if (!--width) break; | |
2803 | ||
2804 | tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ | |
2805 | if (tc < 0) tc = ' '; | |
d8ae7242 | 2806 | next_c = ' '; |
2f1a2ccb | 2807 | } |
b293d758 | 2808 | notify_write(vc, c); |
2f1a2ccb | 2809 | |
d711ea8f JS |
2810 | if (inverse) |
2811 | con_flush(vc, draw_from, draw_to, &draw_x); | |
1ed8a2b3 | 2812 | |
2f1a2ccb EK |
2813 | if (rescan) { |
2814 | rescan = 0; | |
2815 | inverse = 0; | |
2816 | width = 1; | |
d4328b40 AT |
2817 | c = orig; |
2818 | goto rescan_last_byte; | |
2819 | } | |
1da177e4 LT |
2820 | continue; |
2821 | } | |
d711ea8f | 2822 | con_flush(vc, draw_from, draw_to, &draw_x); |
1da177e4 LT |
2823 | do_con_trol(tty, vc, orig); |
2824 | } | |
d711ea8f | 2825 | con_flush(vc, draw_from, draw_to, &draw_x); |
0224080f | 2826 | vc_uniscr_debug_check(vc); |
1da177e4 | 2827 | console_conditional_schedule(); |
b293d758 | 2828 | notify_update(vc); |
7e1d2263 | 2829 | console_unlock(); |
1da177e4 | 2830 | return n; |
1da177e4 LT |
2831 | } |
2832 | ||
2833 | /* | |
2834 | * This is the console switching callback. | |
2835 | * | |
2836 | * Doing console switching in a process context allows | |
2837 | * us to do the switches asynchronously (needed when we want | |
2838 | * to switch due to a keyboard interrupt). Synchronization | |
2839 | * with other console code and prevention of re-entrancy is | |
ac751efa | 2840 | * ensured with console_lock. |
1da177e4 | 2841 | */ |
65f27f38 | 2842 | static void console_callback(struct work_struct *ignored) |
1da177e4 | 2843 | { |
ac751efa | 2844 | console_lock(); |
1da177e4 LT |
2845 | |
2846 | if (want_console >= 0) { | |
2847 | if (want_console != fg_console && | |
2848 | vc_cons_allocated(want_console)) { | |
2849 | hide_cursor(vc_cons[fg_console].d); | |
2850 | change_console(vc_cons[want_console].d); | |
2851 | /* we only changed when the console had already | |
2852 | been allocated - a new console is not created | |
2853 | in an interrupt routine */ | |
2854 | } | |
2855 | want_console = -1; | |
2856 | } | |
2857 | if (do_poke_blanked_console) { /* do not unblank for a LED change */ | |
2858 | do_poke_blanked_console = 0; | |
2859 | poke_blanked_console(); | |
2860 | } | |
2861 | if (scrollback_delta) { | |
2862 | struct vc_data *vc = vc_cons[fg_console].d; | |
2863 | clear_selection(); | |
97293de9 | 2864 | if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta) |
1da177e4 LT |
2865 | vc->vc_sw->con_scrolldelta(vc, scrollback_delta); |
2866 | scrollback_delta = 0; | |
2867 | } | |
2868 | if (blank_timer_expired) { | |
2869 | do_blank_screen(0); | |
2870 | blank_timer_expired = 0; | |
2871 | } | |
b293d758 | 2872 | notify_update(vc_cons[fg_console].d); |
1da177e4 | 2873 | |
ac751efa | 2874 | console_unlock(); |
1da177e4 LT |
2875 | } |
2876 | ||
b257bc05 | 2877 | int set_console(int nr) |
1da177e4 | 2878 | { |
b257bc05 AJ |
2879 | struct vc_data *vc = vc_cons[fg_console].d; |
2880 | ||
2881 | if (!vc_cons_allocated(nr) || vt_dont_switch || | |
2882 | (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { | |
2883 | ||
2884 | /* | |
2885 | * Console switch will fail in console_callback() or | |
2886 | * change_console() so there is no point scheduling | |
2887 | * the callback | |
2888 | * | |
2889 | * Existing set_console() users don't check the return | |
2890 | * value so this shouldn't break anything | |
2891 | */ | |
2892 | return -EINVAL; | |
2893 | } | |
2894 | ||
1da177e4 LT |
2895 | want_console = nr; |
2896 | schedule_console_callback(); | |
b257bc05 AJ |
2897 | |
2898 | return 0; | |
1da177e4 LT |
2899 | } |
2900 | ||
2901 | struct tty_driver *console_driver; | |
2902 | ||
2903 | #ifdef CONFIG_VT_CONSOLE | |
2904 | ||
5ada918b BW |
2905 | /** |
2906 | * vt_kmsg_redirect() - Sets/gets the kernel message console | |
2907 | * @new: The new virtual terminal number or -1 if the console should stay | |
2908 | * unchanged | |
2909 | * | |
2910 | * By default, the kernel messages are always printed on the current virtual | |
2911 | * console. However, the user may modify that default with the | |
2912 | * TIOCL_SETKMSGREDIRECT ioctl call. | |
2913 | * | |
2914 | * This function sets the kernel message console to be @new. It returns the old | |
2915 | * virtual console number. The virtual terminal number 0 (both as parameter and | |
2916 | * return value) means no redirection (i.e. always printed on the currently | |
2917 | * active console). | |
2918 | * | |
2919 | * The parameter -1 means that only the current console is returned, but the | |
2920 | * value is not modified. You may use the macro vt_get_kmsg_redirect() in that | |
2921 | * case to make the code more understandable. | |
2922 | * | |
2923 | * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores | |
2924 | * the parameter and always returns 0. | |
2925 | */ | |
2926 | int vt_kmsg_redirect(int new) | |
2927 | { | |
2928 | static int kmsg_con; | |
2929 | ||
2930 | if (new != -1) | |
2931 | return xchg(&kmsg_con, new); | |
2932 | else | |
2933 | return kmsg_con; | |
2934 | } | |
2935 | ||
1da177e4 LT |
2936 | /* |
2937 | * Console on virtual terminal | |
2938 | * | |
2939 | * The console must be locked when we get here. | |
2940 | */ | |
2941 | ||
2942 | static void vt_console_print(struct console *co, const char *b, unsigned count) | |
2943 | { | |
2944 | struct vc_data *vc = vc_cons[fg_console].d; | |
2945 | unsigned char c; | |
b0940003 | 2946 | static DEFINE_SPINLOCK(printing_lock); |
1da177e4 | 2947 | const ushort *start; |
6609cff6 | 2948 | ushort start_x, cnt; |
5ada918b | 2949 | int kmsg_console; |
1da177e4 LT |
2950 | |
2951 | /* console busy or not yet initialized */ | |
b0940003 NP |
2952 | if (!printable) |
2953 | return; | |
2954 | if (!spin_trylock(&printing_lock)) | |
1da177e4 LT |
2955 | return; |
2956 | ||
5ada918b BW |
2957 | kmsg_console = vt_get_kmsg_redirect(); |
2958 | if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) | |
2959 | vc = vc_cons[kmsg_console - 1].d; | |
1da177e4 | 2960 | |
1da177e4 LT |
2961 | if (!vc_cons_allocated(fg_console)) { |
2962 | /* impossible */ | |
2963 | /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ | |
2964 | goto quit; | |
2965 | } | |
2966 | ||
8d7fc299 | 2967 | if (vc->vc_mode != KD_TEXT) |
1da177e4 LT |
2968 | goto quit; |
2969 | ||
2970 | /* undraw cursor first */ | |
6ca8dfd7 | 2971 | if (con_is_fg(vc)) |
1da177e4 LT |
2972 | hide_cursor(vc); |
2973 | ||
2974 | start = (ushort *)vc->vc_pos; | |
6609cff6 NP |
2975 | start_x = vc->vc_x; |
2976 | cnt = 0; | |
1da177e4 LT |
2977 | while (count--) { |
2978 | c = *b++; | |
2979 | if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { | |
6609cff6 NP |
2980 | if (cnt && con_is_visible(vc)) |
2981 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x); | |
2982 | cnt = 0; | |
1da177e4 LT |
2983 | if (c == 8) { /* backspace */ |
2984 | bs(vc); | |
2985 | start = (ushort *)vc->vc_pos; | |
6609cff6 | 2986 | start_x = vc->vc_x; |
1da177e4 LT |
2987 | continue; |
2988 | } | |
2989 | if (c != 13) | |
2990 | lf(vc); | |
2991 | cr(vc); | |
2992 | start = (ushort *)vc->vc_pos; | |
6609cff6 | 2993 | start_x = vc->vc_x; |
1da177e4 LT |
2994 | if (c == 10 || c == 13) |
2995 | continue; | |
2996 | } | |
6609cff6 | 2997 | vc_uniscr_putc(vc, c); |
1da177e4 | 2998 | scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); |
b293d758 | 2999 | notify_write(vc, c); |
1da177e4 | 3000 | cnt++; |
6609cff6 | 3001 | if (vc->vc_x == vc->vc_cols - 1) { |
1da177e4 | 3002 | vc->vc_need_wrap = 1; |
6609cff6 NP |
3003 | } else { |
3004 | vc->vc_pos += 2; | |
3005 | vc->vc_x++; | |
1da177e4 LT |
3006 | } |
3007 | } | |
6609cff6 NP |
3008 | if (cnt && con_is_visible(vc)) |
3009 | vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, start_x); | |
1da177e4 | 3010 | set_cursor(vc); |
b293d758 | 3011 | notify_update(vc); |
1da177e4 LT |
3012 | |
3013 | quit: | |
b0940003 | 3014 | spin_unlock(&printing_lock); |
1da177e4 LT |
3015 | } |
3016 | ||
3017 | static struct tty_driver *vt_console_device(struct console *c, int *index) | |
3018 | { | |
3019 | *index = c->index ? c->index-1 : fg_console; | |
3020 | return console_driver; | |
3021 | } | |
3022 | ||
3023 | static struct console vt_console_driver = { | |
3024 | .name = "tty", | |
3025 | .write = vt_console_print, | |
3026 | .device = vt_console_device, | |
3027 | .unblank = unblank_screen, | |
3028 | .flags = CON_PRINTBUFFER, | |
3029 | .index = -1, | |
3030 | }; | |
3031 | #endif | |
3032 | ||
3033 | /* | |
3034 | * Handling of Linux-specific VC ioctls | |
3035 | */ | |
3036 | ||
3037 | /* | |
ac751efa | 3038 | * Generally a bit racy with respect to console_lock();. |
1da177e4 LT |
3039 | * |
3040 | * There are some functions which don't need it. | |
3041 | * | |
3042 | * There are some functions which can sleep for arbitrary periods | |
3043 | * (paste_selection) but we don't need the lock there anyway. | |
3044 | * | |
496124e5 | 3045 | * set_selection_user has locking, and definitely needs it |
1da177e4 LT |
3046 | */ |
3047 | ||
3048 | int tioclinux(struct tty_struct *tty, unsigned long arg) | |
3049 | { | |
3050 | char type, data; | |
3051 | char __user *p = (char __user *)arg; | |
3052 | int lines; | |
3053 | int ret; | |
3054 | ||
1da177e4 LT |
3055 | if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) |
3056 | return -EPERM; | |
3057 | if (get_user(type, p)) | |
3058 | return -EFAULT; | |
3059 | ret = 0; | |
04f378b1 | 3060 | |
1da177e4 LT |
3061 | switch (type) |
3062 | { | |
3063 | case TIOCL_SETSEL: | |
496124e5 OK |
3064 | ret = set_selection_user((struct tiocl_selection |
3065 | __user *)(p+1), tty); | |
1da177e4 LT |
3066 | break; |
3067 | case TIOCL_PASTESEL: | |
3068 | ret = paste_selection(tty); | |
3069 | break; | |
3070 | case TIOCL_UNBLANKSCREEN: | |
ac751efa | 3071 | console_lock(); |
1da177e4 | 3072 | unblank_screen(); |
ac751efa | 3073 | console_unlock(); |
1da177e4 LT |
3074 | break; |
3075 | case TIOCL_SELLOADLUT: | |
5289475d | 3076 | console_lock(); |
1da177e4 | 3077 | ret = sel_loadlut(p); |
5289475d | 3078 | console_unlock(); |
1da177e4 LT |
3079 | break; |
3080 | case TIOCL_GETSHIFTSTATE: | |
04f378b1 | 3081 | |
1da177e4 LT |
3082 | /* |
3083 | * Make it possible to react to Shift+Mousebutton. | |
3084 | * Note that 'shift_state' is an undocumented | |
3085 | * kernel-internal variable; programs not closely | |
3086 | * related to the kernel should not use this. | |
3087 | */ | |
079c9534 | 3088 | data = vt_get_shift_state(); |
6987dc8a | 3089 | ret = put_user(data, p); |
1da177e4 LT |
3090 | break; |
3091 | case TIOCL_GETMOUSEREPORTING: | |
20f62579 | 3092 | console_lock(); /* May be overkill */ |
1da177e4 | 3093 | data = mouse_reporting(); |
20f62579 | 3094 | console_unlock(); |
6987dc8a | 3095 | ret = put_user(data, p); |
1da177e4 LT |
3096 | break; |
3097 | case TIOCL_SETVESABLANK: | |
20f62579 | 3098 | console_lock(); |
403aac96 | 3099 | ret = set_vesa_blanking(p); |
20f62579 | 3100 | console_unlock(); |
1da177e4 | 3101 | break; |
0ca07731 | 3102 | case TIOCL_GETKMSGREDIRECT: |
5ada918b | 3103 | data = vt_get_kmsg_redirect(); |
6987dc8a | 3104 | ret = put_user(data, p); |
0ca07731 | 3105 | break; |
1da177e4 LT |
3106 | case TIOCL_SETKMSGREDIRECT: |
3107 | if (!capable(CAP_SYS_ADMIN)) { | |
3108 | ret = -EPERM; | |
3109 | } else { | |
3110 | if (get_user(data, p+1)) | |
3111 | ret = -EFAULT; | |
3112 | else | |
5ada918b | 3113 | vt_kmsg_redirect(data); |
1da177e4 LT |
3114 | } |
3115 | break; | |
3116 | case TIOCL_GETFGCONSOLE: | |
20f62579 AC |
3117 | /* No locking needed as this is a transiently |
3118 | correct return anyway if the caller hasn't | |
3119 | disabled switching */ | |
1da177e4 LT |
3120 | ret = fg_console; |
3121 | break; | |
3122 | case TIOCL_SCROLLCONSOLE: | |
3123 | if (get_user(lines, (s32 __user *)(p+4))) { | |
3124 | ret = -EFAULT; | |
3125 | } else { | |
20f62579 AC |
3126 | /* Need the console lock here. Note that lots |
3127 | of other calls need fixing before the lock | |
3128 | is actually useful ! */ | |
3129 | console_lock(); | |
1da177e4 | 3130 | scrollfront(vc_cons[fg_console].d, lines); |
20f62579 | 3131 | console_unlock(); |
1da177e4 LT |
3132 | ret = 0; |
3133 | } | |
3134 | break; | |
3135 | case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ | |
ac751efa | 3136 | console_lock(); |
1da177e4 LT |
3137 | ignore_poke = 1; |
3138 | do_blank_screen(0); | |
ac751efa | 3139 | console_unlock(); |
1da177e4 LT |
3140 | break; |
3141 | case TIOCL_BLANKEDSCREEN: | |
3142 | ret = console_blanked; | |
3143 | break; | |
3144 | default: | |
3145 | ret = -EINVAL; | |
3146 | break; | |
3147 | } | |
3148 | return ret; | |
3149 | } | |
3150 | ||
3151 | /* | |
3152 | * /dev/ttyN handling | |
3153 | */ | |
3154 | ||
3155 | static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
3156 | { | |
3157 | int retval; | |
3158 | ||
3159 | retval = do_con_write(tty, buf, count); | |
3160 | con_flush_chars(tty); | |
3161 | ||
3162 | return retval; | |
3163 | } | |
3164 | ||
5d19f546 | 3165 | static int con_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
3166 | { |
3167 | if (in_interrupt()) | |
5d19f546 AC |
3168 | return 0; /* n_r3964 calls put_char() from interrupt context */ |
3169 | return do_con_write(tty, &ch, 1); | |
1da177e4 LT |
3170 | } |
3171 | ||
3172 | static int con_write_room(struct tty_struct *tty) | |
3173 | { | |
3174 | if (tty->stopped) | |
3175 | return 0; | |
a88a69c9 | 3176 | return 32768; /* No limit, really; we're not buffering */ |
1da177e4 LT |
3177 | } |
3178 | ||
3179 | static int con_chars_in_buffer(struct tty_struct *tty) | |
3180 | { | |
3181 | return 0; /* we're not buffering */ | |
3182 | } | |
3183 | ||
3184 | /* | |
3185 | * con_throttle and con_unthrottle are only used for | |
3186 | * paste_selection(), which has to stuff in a large number of | |
3187 | * characters... | |
3188 | */ | |
3189 | static void con_throttle(struct tty_struct *tty) | |
3190 | { | |
3191 | } | |
3192 | ||
3193 | static void con_unthrottle(struct tty_struct *tty) | |
3194 | { | |
3195 | struct vc_data *vc = tty->driver_data; | |
3196 | ||
3197 | wake_up_interruptible(&vc->paste_wait); | |
3198 | } | |
3199 | ||
3200 | /* | |
3201 | * Turn the Scroll-Lock LED on when the tty is stopped | |
3202 | */ | |
3203 | static void con_stop(struct tty_struct *tty) | |
3204 | { | |
3205 | int console_num; | |
3206 | if (!tty) | |
3207 | return; | |
3208 | console_num = tty->index; | |
3209 | if (!vc_cons_allocated(console_num)) | |
3210 | return; | |
079c9534 | 3211 | vt_kbd_con_stop(console_num); |
1da177e4 LT |
3212 | } |
3213 | ||
3214 | /* | |
3215 | * Turn the Scroll-Lock LED off when the console is started | |
3216 | */ | |
3217 | static void con_start(struct tty_struct *tty) | |
3218 | { | |
3219 | int console_num; | |
3220 | if (!tty) | |
3221 | return; | |
3222 | console_num = tty->index; | |
3223 | if (!vc_cons_allocated(console_num)) | |
3224 | return; | |
079c9534 | 3225 | vt_kbd_con_start(console_num); |
1da177e4 LT |
3226 | } |
3227 | ||
3228 | static void con_flush_chars(struct tty_struct *tty) | |
3229 | { | |
3230 | struct vc_data *vc; | |
3231 | ||
3232 | if (in_interrupt()) /* from flush_to_ldisc */ | |
3233 | return; | |
3234 | ||
3235 | /* if we race with con_close(), vt may be null */ | |
ac751efa | 3236 | console_lock(); |
1da177e4 LT |
3237 | vc = tty->driver_data; |
3238 | if (vc) | |
3239 | set_cursor(vc); | |
ac751efa | 3240 | console_unlock(); |
1da177e4 LT |
3241 | } |
3242 | ||
3243 | /* | |
3244 | * Allocate the console screen memory. | |
3245 | */ | |
bc1e99d9 | 3246 | static int con_install(struct tty_driver *driver, struct tty_struct *tty) |
1da177e4 LT |
3247 | { |
3248 | unsigned int currcons = tty->index; | |
bc1e99d9 JS |
3249 | struct vc_data *vc; |
3250 | int ret; | |
1da177e4 | 3251 | |
ac751efa | 3252 | console_lock(); |
bc1e99d9 JS |
3253 | ret = vc_allocate(currcons); |
3254 | if (ret) | |
3255 | goto unlock; | |
feebed65 | 3256 | |
bc1e99d9 | 3257 | vc = vc_cons[currcons].d; |
1da177e4 | 3258 | |
bc1e99d9 JS |
3259 | /* Still being freed */ |
3260 | if (vc->port.tty) { | |
3261 | ret = -ERESTARTSYS; | |
3262 | goto unlock; | |
3263 | } | |
3264 | ||
3265 | ret = tty_port_install(&vc->port, driver, tty); | |
3266 | if (ret) | |
3267 | goto unlock; | |
3268 | ||
3269 | tty->driver_data = vc; | |
3270 | vc->port.tty = tty; | |
ca4463bf | 3271 | tty_port_get(&vc->port); |
bc1e99d9 JS |
3272 | |
3273 | if (!tty->winsize.ws_row && !tty->winsize.ws_col) { | |
3274 | tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; | |
3275 | tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; | |
1da177e4 | 3276 | } |
bc1e99d9 | 3277 | if (vc->vc_utf) |
adc8d746 | 3278 | tty->termios.c_iflag |= IUTF8; |
bc1e99d9 | 3279 | else |
adc8d746 | 3280 | tty->termios.c_iflag &= ~IUTF8; |
bc1e99d9 | 3281 | unlock: |
ac751efa | 3282 | console_unlock(); |
1da177e4 LT |
3283 | return ret; |
3284 | } | |
3285 | ||
bc1e99d9 JS |
3286 | static int con_open(struct tty_struct *tty, struct file *filp) |
3287 | { | |
3288 | /* everything done in install */ | |
3289 | return 0; | |
3290 | } | |
3291 | ||
3292 | ||
1da177e4 LT |
3293 | static void con_close(struct tty_struct *tty, struct file *filp) |
3294 | { | |
feebed65 AC |
3295 | /* Nothing to do - we defer to shutdown */ |
3296 | } | |
1da177e4 | 3297 | |
feebed65 AC |
3298 | static void con_shutdown(struct tty_struct *tty) |
3299 | { | |
3300 | struct vc_data *vc = tty->driver_data; | |
3301 | BUG_ON(vc == NULL); | |
ac751efa | 3302 | console_lock(); |
8ce73264 | 3303 | vc->port.tty = NULL; |
ac751efa | 3304 | console_unlock(); |
1da177e4 LT |
3305 | } |
3306 | ||
ca4463bf EB |
3307 | static void con_cleanup(struct tty_struct *tty) |
3308 | { | |
3309 | struct vc_data *vc = tty->driver_data; | |
3310 | ||
3311 | tty_port_put(&vc->port); | |
3312 | } | |
3313 | ||
3855ae1c | 3314 | static int default_color = 7; /* white */ |
fa6ce9ab JE |
3315 | static int default_italic_color = 2; // green (ASCII) |
3316 | static int default_underline_color = 3; // cyan (ASCII) | |
3855ae1c | 3317 | module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); |
fa6ce9ab JE |
3318 | module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); |
3319 | module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); | |
3320 | ||
1da177e4 LT |
3321 | static void vc_init(struct vc_data *vc, unsigned int rows, |
3322 | unsigned int cols, int do_clear) | |
3323 | { | |
3324 | int j, k ; | |
3325 | ||
3326 | vc->vc_cols = cols; | |
3327 | vc->vc_rows = rows; | |
3328 | vc->vc_size_row = cols << 1; | |
3329 | vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; | |
3330 | ||
3331 | set_origin(vc); | |
3332 | vc->vc_pos = vc->vc_origin; | |
3333 | reset_vc(vc); | |
3334 | for (j=k=0; j<16; j++) { | |
3335 | vc->vc_palette[k++] = default_red[j] ; | |
3336 | vc->vc_palette[k++] = default_grn[j] ; | |
3337 | vc->vc_palette[k++] = default_blu[j] ; | |
3338 | } | |
3855ae1c | 3339 | vc->vc_def_color = default_color; |
fa6ce9ab JE |
3340 | vc->vc_ulcolor = default_underline_color; |
3341 | vc->vc_itcolor = default_italic_color; | |
1da177e4 LT |
3342 | vc->vc_halfcolor = 0x08; /* grey */ |
3343 | init_waitqueue_head(&vc->paste_wait); | |
3344 | reset_terminal(vc, do_clear); | |
3345 | } | |
3346 | ||
3347 | /* | |
3348 | * This routine initializes console interrupts, and does nothing | |
3349 | * else. If you want the screen to clear, call tty_write with | |
3350 | * the appropriate escape-sequence. | |
3351 | */ | |
3352 | ||
3353 | static int __init con_init(void) | |
3354 | { | |
3355 | const char *display_desc = NULL; | |
3356 | struct vc_data *vc; | |
3e795de7 | 3357 | unsigned int currcons = 0, i; |
1da177e4 | 3358 | |
ac751efa | 3359 | console_lock(); |
1da177e4 | 3360 | |
805ece2a AS |
3361 | if (!conswitchp) |
3362 | conswitchp = &dummy_con; | |
3363 | display_desc = conswitchp->con_startup(); | |
1da177e4 LT |
3364 | if (!display_desc) { |
3365 | fg_console = 0; | |
ac751efa | 3366 | console_unlock(); |
1da177e4 LT |
3367 | return 0; |
3368 | } | |
3369 | ||
3e795de7 AD |
3370 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3371 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
3372 | ||
3373 | if (con_driver->con == NULL) { | |
3374 | con_driver->con = conswitchp; | |
3375 | con_driver->desc = display_desc; | |
3376 | con_driver->flag = CON_DRIVER_FLAG_INIT; | |
3377 | con_driver->first = 0; | |
3378 | con_driver->last = MAX_NR_CONSOLES - 1; | |
3379 | break; | |
3380 | } | |
3381 | } | |
3382 | ||
3383 | for (i = 0; i < MAX_NR_CONSOLES; i++) | |
3384 | con_driver_map[i] = conswitchp; | |
3385 | ||
1da177e4 LT |
3386 | if (blankinterval) { |
3387 | blank_state = blank_normal_wait; | |
f324edc8 | 3388 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
3389 | } |
3390 | ||
1da177e4 | 3391 | for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { |
a5f4f52e | 3392 | vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); |
7f1f86a0 | 3393 | INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); |
ff917ba4 | 3394 | tty_port_init(&vc->port); |
1da177e4 | 3395 | visual_init(vc, currcons, 1); |
a5f4f52e | 3396 | vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); |
1da177e4 LT |
3397 | vc_init(vc, vc->vc_rows, vc->vc_cols, |
3398 | currcons || !vc->vc_sw->con_save_screen); | |
3399 | } | |
3400 | currcons = fg_console = 0; | |
3401 | master_display_fg = vc = vc_cons[currcons].d; | |
3402 | set_origin(vc); | |
3403 | save_screen(vc); | |
3404 | gotoxy(vc, vc->vc_x, vc->vc_y); | |
3405 | csi_J(vc, 0); | |
3406 | update_screen(vc); | |
5da527aa | 3407 | pr_info("Console: %s %s %dx%d\n", |
1da177e4 LT |
3408 | vc->vc_can_do_color ? "colour" : "mono", |
3409 | display_desc, vc->vc_cols, vc->vc_rows); | |
3410 | printable = 1; | |
1da177e4 | 3411 | |
ac751efa | 3412 | console_unlock(); |
1da177e4 LT |
3413 | |
3414 | #ifdef CONFIG_VT_CONSOLE | |
3415 | register_console(&vt_console_driver); | |
3416 | #endif | |
3417 | return 0; | |
3418 | } | |
3419 | console_initcall(con_init); | |
3420 | ||
b68e31d0 | 3421 | static const struct tty_operations con_ops = { |
bc1e99d9 | 3422 | .install = con_install, |
1da177e4 LT |
3423 | .open = con_open, |
3424 | .close = con_close, | |
3425 | .write = con_write, | |
3426 | .write_room = con_write_room, | |
3427 | .put_char = con_put_char, | |
3428 | .flush_chars = con_flush_chars, | |
3429 | .chars_in_buffer = con_chars_in_buffer, | |
3430 | .ioctl = vt_ioctl, | |
e9216651 AB |
3431 | #ifdef CONFIG_COMPAT |
3432 | .compat_ioctl = vt_compat_ioctl, | |
3433 | #endif | |
1da177e4 LT |
3434 | .stop = con_stop, |
3435 | .start = con_start, | |
3436 | .throttle = con_throttle, | |
3437 | .unthrottle = con_unthrottle, | |
8c9a9dd0 | 3438 | .resize = vt_resize, |
ca4463bf EB |
3439 | .shutdown = con_shutdown, |
3440 | .cleanup = con_cleanup, | |
1da177e4 LT |
3441 | }; |
3442 | ||
d81ed103 AC |
3443 | static struct cdev vc0_cdev; |
3444 | ||
fbc92a34 KS |
3445 | static ssize_t show_tty_active(struct device *dev, |
3446 | struct device_attribute *attr, char *buf) | |
3447 | { | |
3448 | return sprintf(buf, "tty%d\n", fg_console + 1); | |
3449 | } | |
3450 | static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); | |
3451 | ||
1083a7be TI |
3452 | static struct attribute *vt_dev_attrs[] = { |
3453 | &dev_attr_active.attr, | |
3454 | NULL | |
3455 | }; | |
3456 | ||
3457 | ATTRIBUTE_GROUPS(vt_dev); | |
3458 | ||
d81ed103 | 3459 | int __init vty_init(const struct file_operations *console_fops) |
1da177e4 | 3460 | { |
d81ed103 AC |
3461 | cdev_init(&vc0_cdev, console_fops); |
3462 | if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || | |
3463 | register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) | |
3464 | panic("Couldn't register /dev/tty0 driver\n"); | |
1083a7be TI |
3465 | tty0dev = device_create_with_groups(tty_class, NULL, |
3466 | MKDEV(TTY_MAJOR, 0), NULL, | |
3467 | vt_dev_groups, "tty0"); | |
fbc92a34 KS |
3468 | if (IS_ERR(tty0dev)) |
3469 | tty0dev = NULL; | |
d81ed103 | 3470 | |
1da177e4 LT |
3471 | vcs_init(); |
3472 | ||
3473 | console_driver = alloc_tty_driver(MAX_NR_CONSOLES); | |
3474 | if (!console_driver) | |
3475 | panic("Couldn't allocate console driver\n"); | |
2f16669d | 3476 | |
1da177e4 LT |
3477 | console_driver->name = "tty"; |
3478 | console_driver->name_base = 1; | |
3479 | console_driver->major = TTY_MAJOR; | |
3480 | console_driver->minor_start = 1; | |
3481 | console_driver->type = TTY_DRIVER_TYPE_CONSOLE; | |
3482 | console_driver->init_termios = tty_std_termios; | |
c1236d31 ST |
3483 | if (default_utf8) |
3484 | console_driver->init_termios.c_iflag |= IUTF8; | |
1da177e4 LT |
3485 | console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; |
3486 | tty_set_operations(console_driver, &con_ops); | |
3487 | if (tty_register_driver(console_driver)) | |
3488 | panic("Couldn't register console driver\n"); | |
1da177e4 LT |
3489 | kbd_init(); |
3490 | console_map_init(); | |
1da177e4 LT |
3491 | #ifdef CONFIG_MDA_CONSOLE |
3492 | mda_console_init(); | |
3493 | #endif | |
3494 | return 0; | |
3495 | } | |
3496 | ||
3497 | #ifndef VT_SINGLE_DRIVER | |
6db4063c AD |
3498 | |
3499 | static struct class *vtconsole_class; | |
3500 | ||
50e244cc | 3501 | static int do_bind_con_driver(const struct consw *csw, int first, int last, |
b7269dd2 | 3502 | int deflt) |
1da177e4 | 3503 | { |
3e795de7 AD |
3504 | struct module *owner = csw->owner; |
3505 | const char *desc = NULL; | |
3506 | struct con_driver *con_driver; | |
3507 | int i, j = -1, k = -1, retval = -ENODEV; | |
1da177e4 | 3508 | |
1da177e4 LT |
3509 | if (!try_module_get(owner)) |
3510 | return -ENODEV; | |
3511 | ||
50e244cc | 3512 | WARN_CONSOLE_UNLOCKED(); |
1c8ce271 | 3513 | |
3e795de7 AD |
3514 | /* check if driver is registered */ |
3515 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3516 | con_driver = ®istered_con_driver[i]; | |
3517 | ||
3518 | if (con_driver->con == csw) { | |
3519 | desc = con_driver->desc; | |
3520 | retval = 0; | |
3521 | break; | |
3522 | } | |
3523 | } | |
3524 | ||
3525 | if (retval) | |
3526 | goto err; | |
3527 | ||
3528 | if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { | |
3529 | csw->con_startup(); | |
3530 | con_driver->flag |= CON_DRIVER_FLAG_INIT; | |
1da177e4 | 3531 | } |
1c8ce271 | 3532 | |
1da177e4 LT |
3533 | if (deflt) { |
3534 | if (conswitchp) | |
3535 | module_put(conswitchp->owner); | |
1c8ce271 | 3536 | |
1da177e4 LT |
3537 | __module_get(owner); |
3538 | conswitchp = csw; | |
3539 | } | |
3540 | ||
3e795de7 AD |
3541 | first = max(first, con_driver->first); |
3542 | last = min(last, con_driver->last); | |
3543 | ||
1da177e4 LT |
3544 | for (i = first; i <= last; i++) { |
3545 | int old_was_color; | |
3546 | struct vc_data *vc = vc_cons[i].d; | |
3547 | ||
3548 | if (con_driver_map[i]) | |
3549 | module_put(con_driver_map[i]->owner); | |
3550 | __module_get(owner); | |
3551 | con_driver_map[i] = csw; | |
3552 | ||
3553 | if (!vc || !vc->vc_sw) | |
3554 | continue; | |
3555 | ||
3556 | j = i; | |
1c8ce271 | 3557 | |
6ca8dfd7 | 3558 | if (con_is_visible(vc)) { |
4ee1acce | 3559 | k = i; |
1da177e4 | 3560 | save_screen(vc); |
4ee1acce DH |
3561 | } |
3562 | ||
1da177e4 LT |
3563 | old_was_color = vc->vc_can_do_color; |
3564 | vc->vc_sw->con_deinit(vc); | |
9fc2b2d0 | 3565 | vc->vc_origin = (unsigned long)vc->vc_screenbuf; |
1da177e4 | 3566 | visual_init(vc, i, 0); |
1c8ce271 | 3567 | set_origin(vc); |
1da177e4 LT |
3568 | update_attr(vc); |
3569 | ||
3570 | /* If the console changed between mono <-> color, then | |
3571 | * the attributes in the screenbuf will be wrong. The | |
3572 | * following resets all attributes to something sane. | |
3573 | */ | |
3574 | if (old_was_color != vc->vc_can_do_color) | |
3575 | clear_buffer_attributes(vc); | |
1da177e4 | 3576 | } |
4ee1acce | 3577 | |
1ffdda95 | 3578 | pr_info("Console: switching "); |
1da177e4 | 3579 | if (!deflt) |
bccf1da3 | 3580 | pr_cont("consoles %d-%d ", first + 1, last + 1); |
4ee1acce DH |
3581 | if (j >= 0) { |
3582 | struct vc_data *vc = vc_cons[j].d; | |
3583 | ||
bccf1da3 JP |
3584 | pr_cont("to %s %s %dx%d\n", |
3585 | vc->vc_can_do_color ? "colour" : "mono", | |
3586 | desc, vc->vc_cols, vc->vc_rows); | |
4ee1acce DH |
3587 | |
3588 | if (k >= 0) { | |
3589 | vc = vc_cons[k].d; | |
3590 | update_screen(vc); | |
3591 | } | |
bccf1da3 JP |
3592 | } else { |
3593 | pr_cont("to %s\n", desc); | |
3594 | } | |
1da177e4 | 3595 | |
3e795de7 AD |
3596 | retval = 0; |
3597 | err: | |
1da177e4 | 3598 | module_put(owner); |
3e795de7 AD |
3599 | return retval; |
3600 | }; | |
1da177e4 | 3601 | |
50e244cc | 3602 | |
13ae6645 | 3603 | #ifdef CONFIG_VT_HW_CONSOLE_BINDING |
e93a9a86 | 3604 | int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) |
1da177e4 | 3605 | { |
3e795de7 AD |
3606 | struct module *owner = csw->owner; |
3607 | const struct consw *defcsw = NULL; | |
3608 | struct con_driver *con_driver = NULL, *con_back = NULL; | |
3609 | int i, retval = -ENODEV; | |
1da177e4 | 3610 | |
3e795de7 AD |
3611 | if (!try_module_get(owner)) |
3612 | return -ENODEV; | |
3613 | ||
e93a9a86 | 3614 | WARN_CONSOLE_UNLOCKED(); |
3e795de7 AD |
3615 | |
3616 | /* check if driver is registered and if it is unbindable */ | |
3617 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3618 | con_driver = ®istered_con_driver[i]; | |
3619 | ||
3620 | if (con_driver->con == csw && | |
6db4063c | 3621 | con_driver->flag & CON_DRIVER_FLAG_MODULE) { |
3e795de7 AD |
3622 | retval = 0; |
3623 | break; | |
3624 | } | |
3625 | } | |
3626 | ||
e93a9a86 | 3627 | if (retval) |
3e795de7 | 3628 | goto err; |
3e795de7 | 3629 | |
6db4063c AD |
3630 | retval = -ENODEV; |
3631 | ||
3e795de7 AD |
3632 | /* check if backup driver exists */ |
3633 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3634 | con_back = ®istered_con_driver[i]; | |
3635 | ||
249f7b3e | 3636 | if (con_back->con && con_back->con != csw) { |
3e795de7 AD |
3637 | defcsw = con_back->con; |
3638 | retval = 0; | |
3639 | break; | |
3640 | } | |
3641 | } | |
3642 | ||
e93a9a86 | 3643 | if (retval) |
3e795de7 | 3644 | goto err; |
3e795de7 | 3645 | |
e93a9a86 | 3646 | if (!con_is_bound(csw)) |
3e795de7 | 3647 | goto err; |
3e795de7 AD |
3648 | |
3649 | first = max(first, con_driver->first); | |
3650 | last = min(last, con_driver->last); | |
3651 | ||
3652 | for (i = first; i <= last; i++) { | |
1da177e4 LT |
3653 | if (con_driver_map[i] == csw) { |
3654 | module_put(csw->owner); | |
3655 | con_driver_map[i] = NULL; | |
3656 | } | |
3e795de7 AD |
3657 | } |
3658 | ||
3659 | if (!con_is_bound(defcsw)) { | |
6db4063c AD |
3660 | const struct consw *defconsw = conswitchp; |
3661 | ||
3e795de7 AD |
3662 | defcsw->con_startup(); |
3663 | con_back->flag |= CON_DRIVER_FLAG_INIT; | |
6db4063c AD |
3664 | /* |
3665 | * vgacon may change the default driver to point | |
3666 | * to dummycon, we restore it here... | |
3667 | */ | |
3668 | conswitchp = defconsw; | |
3e795de7 AD |
3669 | } |
3670 | ||
3671 | if (!con_is_bound(csw)) | |
3672 | con_driver->flag &= ~CON_DRIVER_FLAG_INIT; | |
3673 | ||
6db4063c | 3674 | /* ignore return value, binding should not fail */ |
50e244cc | 3675 | do_bind_con_driver(defcsw, first, last, deflt); |
3e795de7 AD |
3676 | err: |
3677 | module_put(owner); | |
3678 | return retval; | |
3679 | ||
3680 | } | |
e93a9a86 | 3681 | EXPORT_SYMBOL_GPL(do_unbind_con_driver); |
3e795de7 | 3682 | |
6db4063c AD |
3683 | static int vt_bind(struct con_driver *con) |
3684 | { | |
3685 | const struct consw *defcsw = NULL, *csw = NULL; | |
3686 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
3687 | ||
77232f79 | 3688 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3689 | goto err; |
3690 | ||
3691 | csw = con->con; | |
3692 | ||
3693 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
3694 | struct con_driver *con = ®istered_con_driver[i]; | |
3695 | ||
3696 | if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { | |
3697 | defcsw = con->con; | |
3698 | break; | |
3699 | } | |
3700 | } | |
3701 | ||
3702 | if (!defcsw) | |
3703 | goto err; | |
3704 | ||
3705 | while (more) { | |
3706 | more = 0; | |
3707 | ||
3708 | for (i = con->first; i <= con->last; i++) { | |
3709 | if (con_driver_map[i] == defcsw) { | |
3710 | if (first == -1) | |
3711 | first = i; | |
3712 | last = i; | |
3713 | more = 1; | |
3714 | } else if (first != -1) | |
3715 | break; | |
3716 | } | |
3717 | ||
3718 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3719 | deflt = 1; | |
3720 | ||
4c215fe8 | 3721 | if (first != -1) |
c62a1e57 | 3722 | do_bind_con_driver(csw, first, last, deflt); |
6db4063c AD |
3723 | |
3724 | first = -1; | |
3725 | last = -1; | |
3726 | deflt = 0; | |
3727 | } | |
3728 | ||
3729 | err: | |
3730 | return 0; | |
3731 | } | |
3732 | ||
3733 | static int vt_unbind(struct con_driver *con) | |
3734 | { | |
3735 | const struct consw *csw = NULL; | |
3736 | int i, more = 1, first = -1, last = -1, deflt = 0; | |
f418f2ec | 3737 | int ret; |
6db4063c | 3738 | |
77232f79 | 3739 | if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE)) |
6db4063c AD |
3740 | goto err; |
3741 | ||
3742 | csw = con->con; | |
3743 | ||
3744 | while (more) { | |
3745 | more = 0; | |
3746 | ||
3747 | for (i = con->first; i <= con->last; i++) { | |
3748 | if (con_driver_map[i] == csw) { | |
3749 | if (first == -1) | |
3750 | first = i; | |
3751 | last = i; | |
3752 | more = 1; | |
3753 | } else if (first != -1) | |
3754 | break; | |
3755 | } | |
3756 | ||
3757 | if (first == 0 && last == MAX_NR_CONSOLES -1) | |
3758 | deflt = 1; | |
3759 | ||
618f2b90 | 3760 | if (first != -1) { |
f418f2ec | 3761 | ret = do_unbind_con_driver(csw, first, last, deflt); |
f418f2ec SV |
3762 | if (ret != 0) |
3763 | return ret; | |
618f2b90 | 3764 | } |
6db4063c AD |
3765 | |
3766 | first = -1; | |
3767 | last = -1; | |
3768 | deflt = 0; | |
3769 | } | |
3770 | ||
3771 | err: | |
3772 | return 0; | |
3773 | } | |
13ae6645 AD |
3774 | #else |
3775 | static inline int vt_bind(struct con_driver *con) | |
3776 | { | |
3777 | return 0; | |
3778 | } | |
3779 | static inline int vt_unbind(struct con_driver *con) | |
3780 | { | |
3781 | return 0; | |
3782 | } | |
3783 | #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ | |
6db4063c | 3784 | |
805952a8 | 3785 | static ssize_t store_bind(struct device *dev, struct device_attribute *attr, |
6db4063c AD |
3786 | const char *buf, size_t count) |
3787 | { | |
805952a8 | 3788 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3789 | int bind = simple_strtoul(buf, NULL, 0); |
3790 | ||
4c215fe8 ID |
3791 | console_lock(); |
3792 | ||
6db4063c AD |
3793 | if (bind) |
3794 | vt_bind(con); | |
3795 | else | |
3796 | vt_unbind(con); | |
3797 | ||
4c215fe8 ID |
3798 | console_unlock(); |
3799 | ||
6db4063c AD |
3800 | return count; |
3801 | } | |
3802 | ||
805952a8 GKH |
3803 | static ssize_t show_bind(struct device *dev, struct device_attribute *attr, |
3804 | char *buf) | |
6db4063c | 3805 | { |
805952a8 | 3806 | struct con_driver *con = dev_get_drvdata(dev); |
61d51456 SV |
3807 | int bind; |
3808 | ||
3809 | console_lock(); | |
3810 | bind = con_is_bound(con->con); | |
3811 | console_unlock(); | |
6db4063c AD |
3812 | |
3813 | return snprintf(buf, PAGE_SIZE, "%i\n", bind); | |
3814 | } | |
3815 | ||
805952a8 GKH |
3816 | static ssize_t show_name(struct device *dev, struct device_attribute *attr, |
3817 | char *buf) | |
6db4063c | 3818 | { |
805952a8 | 3819 | struct con_driver *con = dev_get_drvdata(dev); |
6db4063c AD |
3820 | |
3821 | return snprintf(buf, PAGE_SIZE, "%s %s\n", | |
3822 | (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", | |
3823 | con->desc); | |
3824 | ||
3825 | } | |
3826 | ||
1083a7be TI |
3827 | static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind); |
3828 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
3829 | ||
3830 | static struct attribute *con_dev_attrs[] = { | |
3831 | &dev_attr_bind.attr, | |
3832 | &dev_attr_name.attr, | |
3833 | NULL | |
6db4063c AD |
3834 | }; |
3835 | ||
1083a7be TI |
3836 | ATTRIBUTE_GROUPS(con_dev); |
3837 | ||
805952a8 | 3838 | static int vtconsole_init_device(struct con_driver *con) |
6db4063c | 3839 | { |
928e964f | 3840 | con->flag |= CON_DRIVER_FLAG_ATTR; |
1083a7be | 3841 | return 0; |
6db4063c AD |
3842 | } |
3843 | ||
805952a8 | 3844 | static void vtconsole_deinit_device(struct con_driver *con) |
6db4063c | 3845 | { |
1083a7be | 3846 | con->flag &= ~CON_DRIVER_FLAG_ATTR; |
6db4063c AD |
3847 | } |
3848 | ||
3e795de7 AD |
3849 | /** |
3850 | * con_is_bound - checks if driver is bound to the console | |
3851 | * @csw: console driver | |
3852 | * | |
3853 | * RETURNS: zero if unbound, nonzero if bound | |
3854 | * | |
3855 | * Drivers can call this and if zero, they should release | |
3856 | * all resources allocated on con_startup() | |
3857 | */ | |
3858 | int con_is_bound(const struct consw *csw) | |
3859 | { | |
3860 | int i, bound = 0; | |
3861 | ||
ddde3c18 SV |
3862 | WARN_CONSOLE_UNLOCKED(); |
3863 | ||
3e795de7 AD |
3864 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
3865 | if (con_driver_map[i] == csw) { | |
3866 | bound = 1; | |
3867 | break; | |
3868 | } | |
3869 | } | |
3870 | ||
3871 | return bound; | |
3872 | } | |
3873 | EXPORT_SYMBOL(con_is_bound); | |
3874 | ||
ddde3c18 SV |
3875 | /** |
3876 | * con_is_visible - checks whether the current console is visible | |
3877 | * @vc: virtual console | |
3878 | * | |
3879 | * RETURNS: zero if not visible, nonzero if visible | |
3880 | */ | |
3881 | bool con_is_visible(const struct vc_data *vc) | |
3882 | { | |
3883 | WARN_CONSOLE_UNLOCKED(); | |
3884 | ||
3885 | return *vc->vc_display_fg == vc; | |
3886 | } | |
3887 | EXPORT_SYMBOL(con_is_visible); | |
3888 | ||
b45cfba4 JB |
3889 | /** |
3890 | * con_debug_enter - prepare the console for the kernel debugger | |
3891 | * @sw: console driver | |
3892 | * | |
3893 | * Called when the console is taken over by the kernel debugger, this | |
3894 | * function needs to save the current console state, then put the console | |
3895 | * into a state suitable for the kernel debugger. | |
3896 | * | |
3897 | * RETURNS: | |
3898 | * Zero on success, nonzero if a failure occurred when trying to prepare | |
3899 | * the console for the debugger. | |
3900 | */ | |
3901 | int con_debug_enter(struct vc_data *vc) | |
3902 | { | |
3903 | int ret = 0; | |
3904 | ||
3905 | saved_fg_console = fg_console; | |
3906 | saved_last_console = last_console; | |
3907 | saved_want_console = want_console; | |
3908 | saved_vc_mode = vc->vc_mode; | |
beed5336 | 3909 | saved_console_blanked = console_blanked; |
b45cfba4 JB |
3910 | vc->vc_mode = KD_TEXT; |
3911 | console_blanked = 0; | |
3912 | if (vc->vc_sw->con_debug_enter) | |
3913 | ret = vc->vc_sw->con_debug_enter(vc); | |
81d44507 JW |
3914 | #ifdef CONFIG_KGDB_KDB |
3915 | /* Set the initial LINES variable if it is not already set */ | |
3916 | if (vc->vc_rows < 999) { | |
3917 | int linecount; | |
3918 | char lns[4]; | |
3919 | const char *setargs[3] = { | |
3920 | "set", | |
3921 | "LINES", | |
3922 | lns, | |
3923 | }; | |
3924 | if (kdbgetintenv(setargs[0], &linecount)) { | |
3925 | snprintf(lns, 4, "%i", vc->vc_rows); | |
3926 | kdb_set(2, setargs); | |
3927 | } | |
3928 | } | |
17b572e8 JW |
3929 | if (vc->vc_cols < 999) { |
3930 | int colcount; | |
3931 | char cols[4]; | |
3932 | const char *setargs[3] = { | |
3933 | "set", | |
3934 | "COLUMNS", | |
3935 | cols, | |
3936 | }; | |
3937 | if (kdbgetintenv(setargs[0], &colcount)) { | |
3938 | snprintf(cols, 4, "%i", vc->vc_cols); | |
3939 | kdb_set(2, setargs); | |
3940 | } | |
3941 | } | |
81d44507 | 3942 | #endif /* CONFIG_KGDB_KDB */ |
b45cfba4 JB |
3943 | return ret; |
3944 | } | |
3945 | EXPORT_SYMBOL_GPL(con_debug_enter); | |
3946 | ||
3947 | /** | |
3948 | * con_debug_leave - restore console state | |
3949 | * @sw: console driver | |
3950 | * | |
3951 | * Restore the console state to what it was before the kernel debugger | |
3952 | * was invoked. | |
3953 | * | |
3954 | * RETURNS: | |
3955 | * Zero on success, nonzero if a failure occurred when trying to restore | |
3956 | * the console. | |
3957 | */ | |
3958 | int con_debug_leave(void) | |
3959 | { | |
3960 | struct vc_data *vc; | |
3961 | int ret = 0; | |
3962 | ||
3963 | fg_console = saved_fg_console; | |
3964 | last_console = saved_last_console; | |
3965 | want_console = saved_want_console; | |
beed5336 | 3966 | console_blanked = saved_console_blanked; |
b45cfba4 JB |
3967 | vc_cons[fg_console].d->vc_mode = saved_vc_mode; |
3968 | ||
3969 | vc = vc_cons[fg_console].d; | |
3970 | if (vc->vc_sw->con_debug_leave) | |
3971 | ret = vc->vc_sw->con_debug_leave(vc); | |
3972 | return ret; | |
3973 | } | |
3974 | EXPORT_SYMBOL_GPL(con_debug_leave); | |
3975 | ||
50e244cc | 3976 | static int do_register_con_driver(const struct consw *csw, int first, int last) |
3e795de7 AD |
3977 | { |
3978 | struct module *owner = csw->owner; | |
3979 | struct con_driver *con_driver; | |
3980 | const char *desc; | |
96317e9e | 3981 | int i, retval; |
3e795de7 | 3982 | |
50e244cc AC |
3983 | WARN_CONSOLE_UNLOCKED(); |
3984 | ||
3e795de7 AD |
3985 | if (!try_module_get(owner)) |
3986 | return -ENODEV; | |
3987 | ||
3e795de7 AD |
3988 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
3989 | con_driver = ®istered_con_driver[i]; | |
3990 | ||
3991 | /* already registered */ | |
96317e9e | 3992 | if (con_driver->con == csw) { |
c55c63c6 | 3993 | retval = -EBUSY; |
96317e9e JS |
3994 | goto err; |
3995 | } | |
3e795de7 AD |
3996 | } |
3997 | ||
3e795de7 | 3998 | desc = csw->con_startup(); |
6798df4c JS |
3999 | if (!desc) { |
4000 | retval = -ENODEV; | |
3e795de7 | 4001 | goto err; |
6798df4c | 4002 | } |
3e795de7 AD |
4003 | |
4004 | retval = -EINVAL; | |
4005 | ||
4006 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
4007 | con_driver = ®istered_con_driver[i]; | |
4008 | ||
d364b5c3 ID |
4009 | if (con_driver->con == NULL && |
4010 | !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) { | |
3e795de7 AD |
4011 | con_driver->con = csw; |
4012 | con_driver->desc = desc; | |
6db4063c AD |
4013 | con_driver->node = i; |
4014 | con_driver->flag = CON_DRIVER_FLAG_MODULE | | |
3e795de7 AD |
4015 | CON_DRIVER_FLAG_INIT; |
4016 | con_driver->first = first; | |
4017 | con_driver->last = last; | |
4018 | retval = 0; | |
4019 | break; | |
4020 | } | |
4021 | } | |
4022 | ||
6db4063c AD |
4023 | if (retval) |
4024 | goto err; | |
4025 | ||
1083a7be TI |
4026 | con_driver->dev = |
4027 | device_create_with_groups(vtconsole_class, NULL, | |
4028 | MKDEV(0, con_driver->node), | |
4029 | con_driver, con_dev_groups, | |
4030 | "vtcon%i", con_driver->node); | |
805952a8 | 4031 | if (IS_ERR(con_driver->dev)) { |
bccf1da3 JP |
4032 | pr_warn("Unable to create device for %s; errno = %ld\n", |
4033 | con_driver->desc, PTR_ERR(con_driver->dev)); | |
805952a8 | 4034 | con_driver->dev = NULL; |
6db4063c | 4035 | } else { |
805952a8 | 4036 | vtconsole_init_device(con_driver); |
6db4063c | 4037 | } |
928e964f | 4038 | |
3e795de7 | 4039 | err: |
3e795de7 AD |
4040 | module_put(owner); |
4041 | return retval; | |
4042 | } | |
50e244cc | 4043 | |
3e795de7 AD |
4044 | |
4045 | /** | |
50539dd4 | 4046 | * do_unregister_con_driver - unregister console driver from console layer |
3e795de7 AD |
4047 | * @csw: console driver |
4048 | * | |
4049 | * DESCRIPTION: All drivers that registers to the console layer must | |
4050 | * call this function upon exit, or if the console driver is in a state | |
4051 | * where it won't be able to handle console services, such as the | |
4052 | * framebuffer console without loaded framebuffer drivers. | |
4053 | * | |
4054 | * The driver must unbind first prior to unregistration. | |
4055 | */ | |
e93a9a86 TI |
4056 | int do_unregister_con_driver(const struct consw *csw) |
4057 | { | |
d9c660e7 | 4058 | int i; |
3e795de7 AD |
4059 | |
4060 | /* cannot unregister a bound driver */ | |
4061 | if (con_is_bound(csw)) | |
d9c660e7 SV |
4062 | return -EBUSY; |
4063 | ||
4064 | if (csw == conswitchp) | |
4065 | return -EINVAL; | |
3e795de7 AD |
4066 | |
4067 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
4068 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
4069 | ||
2cf30f75 | 4070 | if (con_driver->con == csw) { |
d364b5c3 ID |
4071 | /* |
4072 | * Defer the removal of the sysfs entries since that | |
4073 | * will acquire the kernfs s_active lock and we can't | |
4074 | * acquire this lock while holding the console lock: | |
4075 | * the unbind sysfs entry imposes already the opposite | |
4076 | * order. Reset con already here to prevent any later | |
4077 | * lookup to succeed and mark this slot as zombie, so | |
4078 | * it won't get reused until we complete the removal | |
4079 | * in the deferred work. | |
4080 | */ | |
3e795de7 | 4081 | con_driver->con = NULL; |
d364b5c3 ID |
4082 | con_driver->flag = CON_DRIVER_FLAG_ZOMBIE; |
4083 | schedule_work(&con_driver_unregister_work); | |
4084 | ||
d9c660e7 | 4085 | return 0; |
3e795de7 AD |
4086 | } |
4087 | } | |
d9c660e7 SV |
4088 | |
4089 | return -ENODEV; | |
3e795de7 | 4090 | } |
e93a9a86 | 4091 | EXPORT_SYMBOL_GPL(do_unregister_con_driver); |
3e795de7 | 4092 | |
d364b5c3 ID |
4093 | static void con_driver_unregister_callback(struct work_struct *ignored) |
4094 | { | |
4095 | int i; | |
4096 | ||
4097 | console_lock(); | |
4098 | ||
4099 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { | |
4100 | struct con_driver *con_driver = ®istered_con_driver[i]; | |
4101 | ||
4102 | if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) | |
4103 | continue; | |
4104 | ||
4105 | console_unlock(); | |
4106 | ||
4107 | vtconsole_deinit_device(con_driver); | |
4108 | device_destroy(vtconsole_class, MKDEV(0, con_driver->node)); | |
4109 | ||
4110 | console_lock(); | |
4111 | ||
4112 | if (WARN_ON_ONCE(con_driver->con)) | |
4113 | con_driver->con = NULL; | |
4114 | con_driver->desc = NULL; | |
4115 | con_driver->dev = NULL; | |
4116 | con_driver->node = 0; | |
4117 | WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE); | |
4118 | con_driver->flag = 0; | |
4119 | con_driver->first = 0; | |
4120 | con_driver->last = 0; | |
4121 | } | |
4122 | ||
4123 | console_unlock(); | |
4124 | } | |
4125 | ||
3e795de7 AD |
4126 | /* |
4127 | * If we support more console drivers, this function is used | |
4128 | * when a driver wants to take over some existing consoles | |
4129 | * and become default driver for newly opened ones. | |
4130 | * | |
0095ab42 | 4131 | * do_take_over_console is basically a register followed by bind |
50e244cc AC |
4132 | */ |
4133 | int do_take_over_console(const struct consw *csw, int first, int last, int deflt) | |
4134 | { | |
4135 | int err; | |
4136 | ||
4137 | err = do_register_con_driver(csw, first, last); | |
4138 | /* | |
4139 | * If we get an busy error we still want to bind the console driver | |
4140 | * and return success, as we may have unbound the console driver | |
4141 | * but not unregistered it. | |
4142 | */ | |
4143 | if (err == -EBUSY) | |
4144 | err = 0; | |
4145 | if (!err) | |
4146 | do_bind_con_driver(csw, first, last, deflt); | |
4147 | ||
4148 | return err; | |
4149 | } | |
4150 | EXPORT_SYMBOL_GPL(do_take_over_console); | |
4151 | ||
3e795de7 AD |
4152 | |
4153 | /* | |
4154 | * give_up_console is a wrapper to unregister_con_driver. It will only | |
4155 | * work if driver is fully unbound. | |
4156 | */ | |
4157 | void give_up_console(const struct consw *csw) | |
4158 | { | |
70125e76 WY |
4159 | console_lock(); |
4160 | do_unregister_con_driver(csw); | |
4161 | console_unlock(); | |
3e795de7 AD |
4162 | } |
4163 | ||
6db4063c | 4164 | static int __init vtconsole_class_init(void) |
3e795de7 | 4165 | { |
6db4063c | 4166 | int i; |
3e795de7 | 4167 | |
6db4063c AD |
4168 | vtconsole_class = class_create(THIS_MODULE, "vtconsole"); |
4169 | if (IS_ERR(vtconsole_class)) { | |
bccf1da3 JP |
4170 | pr_warn("Unable to create vt console class; errno = %ld\n", |
4171 | PTR_ERR(vtconsole_class)); | |
6db4063c AD |
4172 | vtconsole_class = NULL; |
4173 | } | |
3e795de7 | 4174 | |
6db4063c | 4175 | /* Add system drivers to sysfs */ |
3e795de7 AD |
4176 | for (i = 0; i < MAX_NR_CON_DRIVER; i++) { |
4177 | struct con_driver *con = ®istered_con_driver[i]; | |
4178 | ||
805952a8 | 4179 | if (con->con && !con->dev) { |
1083a7be TI |
4180 | con->dev = |
4181 | device_create_with_groups(vtconsole_class, NULL, | |
4182 | MKDEV(0, con->node), | |
4183 | con, con_dev_groups, | |
4184 | "vtcon%i", con->node); | |
6db4063c | 4185 | |
805952a8 | 4186 | if (IS_ERR(con->dev)) { |
bccf1da3 JP |
4187 | pr_warn("Unable to create device for %s; errno = %ld\n", |
4188 | con->desc, PTR_ERR(con->dev)); | |
805952a8 | 4189 | con->dev = NULL; |
6db4063c | 4190 | } else { |
805952a8 | 4191 | vtconsole_init_device(con); |
6db4063c | 4192 | } |
3e795de7 | 4193 | } |
3e795de7 AD |
4194 | } |
4195 | ||
3e795de7 AD |
4196 | return 0; |
4197 | } | |
6db4063c | 4198 | postcore_initcall(vtconsole_class_init); |
3e795de7 | 4199 | |
1da177e4 LT |
4200 | #endif |
4201 | ||
4202 | /* | |
4203 | * Screen blanking | |
4204 | */ | |
4205 | ||
403aac96 | 4206 | static int set_vesa_blanking(char __user *p) |
1da177e4 | 4207 | { |
403aac96 YY |
4208 | unsigned int mode; |
4209 | ||
4210 | if (get_user(mode, p + 1)) | |
4211 | return -EFAULT; | |
4212 | ||
4213 | vesa_blank_mode = (mode < 4) ? mode : 0; | |
4214 | return 0; | |
1da177e4 LT |
4215 | } |
4216 | ||
1da177e4 LT |
4217 | void do_blank_screen(int entering_gfx) |
4218 | { | |
4219 | struct vc_data *vc = vc_cons[fg_console].d; | |
4220 | int i; | |
4221 | ||
a135513c SV |
4222 | might_sleep(); |
4223 | ||
1da177e4 LT |
4224 | WARN_CONSOLE_UNLOCKED(); |
4225 | ||
4226 | if (console_blanked) { | |
4227 | if (blank_state == blank_vesa_wait) { | |
4228 | blank_state = blank_off; | |
d060a321 | 4229 | vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); |
1da177e4 LT |
4230 | } |
4231 | return; | |
4232 | } | |
1da177e4 LT |
4233 | |
4234 | /* entering graphics mode? */ | |
4235 | if (entering_gfx) { | |
4236 | hide_cursor(vc); | |
4237 | save_screen(vc); | |
4238 | vc->vc_sw->con_blank(vc, -1, 1); | |
4239 | console_blanked = fg_console + 1; | |
b6e8f00f | 4240 | blank_state = blank_off; |
1da177e4 LT |
4241 | set_origin(vc); |
4242 | return; | |
4243 | } | |
4244 | ||
b6e8f00f | 4245 | blank_state = blank_off; |
4246 | ||
1da177e4 LT |
4247 | /* don't blank graphics */ |
4248 | if (vc->vc_mode != KD_TEXT) { | |
4249 | console_blanked = fg_console + 1; | |
4250 | return; | |
4251 | } | |
4252 | ||
4253 | hide_cursor(vc); | |
4254 | del_timer_sync(&console_timer); | |
4255 | blank_timer_expired = 0; | |
4256 | ||
4257 | save_screen(vc); | |
4258 | /* In case we need to reset origin, blanking hook returns 1 */ | |
d060a321 | 4259 | i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); |
1da177e4 LT |
4260 | console_blanked = fg_console + 1; |
4261 | if (i) | |
4262 | set_origin(vc); | |
4263 | ||
4264 | if (console_blank_hook && console_blank_hook(1)) | |
4265 | return; | |
4266 | ||
d060a321 | 4267 | if (vesa_off_interval && vesa_blank_mode) { |
030babac | 4268 | blank_state = blank_vesa_wait; |
1da177e4 LT |
4269 | mod_timer(&console_timer, jiffies + vesa_off_interval); |
4270 | } | |
8b92e87d | 4271 | vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
4272 | } |
4273 | EXPORT_SYMBOL(do_blank_screen); | |
4274 | ||
4275 | /* | |
4276 | * Called by timer as well as from vt_console_driver | |
4277 | */ | |
4278 | void do_unblank_screen(int leaving_gfx) | |
4279 | { | |
4280 | struct vc_data *vc; | |
4281 | ||
4282 | /* This should now always be called from a "sane" (read: can schedule) | |
4283 | * context for the sake of the low level drivers, except in the special | |
4284 | * case of oops_in_progress | |
4285 | */ | |
4286 | if (!oops_in_progress) | |
4287 | might_sleep(); | |
4288 | ||
4289 | WARN_CONSOLE_UNLOCKED(); | |
4290 | ||
4291 | ignore_poke = 0; | |
4292 | if (!console_blanked) | |
4293 | return; | |
4294 | if (!vc_cons_allocated(fg_console)) { | |
4295 | /* impossible */ | |
e620e548 JP |
4296 | pr_warn("unblank_screen: tty %d not allocated ??\n", |
4297 | fg_console + 1); | |
1da177e4 LT |
4298 | return; |
4299 | } | |
4300 | vc = vc_cons[fg_console].d; | |
8d7fc299 | 4301 | if (vc->vc_mode != KD_TEXT) |
1da177e4 LT |
4302 | return; /* but leave console_blanked != 0 */ |
4303 | ||
4304 | if (blankinterval) { | |
f324edc8 | 4305 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
4306 | blank_state = blank_normal_wait; |
4307 | } | |
4308 | ||
4309 | console_blanked = 0; | |
8d7fc299 | 4310 | if (vc->vc_sw->con_blank(vc, 0, leaving_gfx)) |
1da177e4 LT |
4311 | /* Low-level driver cannot restore -> do it ourselves */ |
4312 | update_screen(vc); | |
4313 | if (console_blank_hook) | |
4314 | console_blank_hook(0); | |
4315 | set_palette(vc); | |
4316 | set_cursor(vc); | |
8b92e87d | 4317 | vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); |
1da177e4 LT |
4318 | } |
4319 | EXPORT_SYMBOL(do_unblank_screen); | |
4320 | ||
4321 | /* | |
4322 | * This is called by the outside world to cause a forced unblank, mostly for | |
4323 | * oopses. Currently, I just call do_unblank_screen(0), but we could eventually | |
4324 | * call it with 1 as an argument and so force a mode restore... that may kill | |
4325 | * X or at least garbage the screen but would also make the Oops visible... | |
4326 | */ | |
4327 | void unblank_screen(void) | |
4328 | { | |
4329 | do_unblank_screen(0); | |
4330 | } | |
4331 | ||
4332 | /* | |
70522e12 | 4333 | * We defer the timer blanking to work queue so it can take the console mutex |
1da177e4 | 4334 | * (console operations can still happen at irq time, but only from printk which |
70522e12 | 4335 | * has the console mutex. Not perfect yet, but better than no locking |
1da177e4 | 4336 | */ |
24ed960a | 4337 | static void blank_screen_t(struct timer_list *unused) |
1da177e4 LT |
4338 | { |
4339 | blank_timer_expired = 1; | |
4340 | schedule_work(&console_work); | |
4341 | } | |
4342 | ||
4343 | void poke_blanked_console(void) | |
4344 | { | |
4345 | WARN_CONSOLE_UNLOCKED(); | |
4346 | ||
4347 | /* Add this so we quickly catch whoever might call us in a non | |
4348 | * safe context. Nowadays, unblank_screen() isn't to be called in | |
4349 | * atomic contexts and is allowed to schedule (with the special case | |
4350 | * of oops_in_progress, but that isn't of any concern for this | |
4351 | * function. --BenH. | |
4352 | */ | |
4353 | might_sleep(); | |
4354 | ||
4355 | /* This isn't perfectly race free, but a race here would be mostly harmless, | |
4356 | * at worse, we'll do a spurrious blank and it's unlikely | |
4357 | */ | |
4358 | del_timer(&console_timer); | |
4359 | blank_timer_expired = 0; | |
4360 | ||
4361 | if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) | |
4362 | return; | |
4363 | if (console_blanked) | |
4364 | unblank_screen(); | |
4365 | else if (blankinterval) { | |
f324edc8 | 4366 | mod_timer(&console_timer, jiffies + (blankinterval * HZ)); |
1da177e4 LT |
4367 | blank_state = blank_normal_wait; |
4368 | } | |
4369 | } | |
4370 | ||
4371 | /* | |
4372 | * Palettes | |
4373 | */ | |
4374 | ||
4375 | static void set_palette(struct vc_data *vc) | |
4376 | { | |
4377 | WARN_CONSOLE_UNLOCKED(); | |
4378 | ||
709280da | 4379 | if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette) |
1da177e4 LT |
4380 | vc->vc_sw->con_set_palette(vc, color_table); |
4381 | } | |
4382 | ||
1da177e4 LT |
4383 | /* |
4384 | * Load palette into the DAC registers. arg points to a colour | |
4385 | * map, 3 bytes per colour, 16 colours, range from 0 to 255. | |
4386 | */ | |
4387 | ||
4388 | int con_set_cmap(unsigned char __user *arg) | |
4389 | { | |
871bdea6 MG |
4390 | int i, j, k; |
4391 | unsigned char colormap[3*16]; | |
4392 | ||
4393 | if (copy_from_user(colormap, arg, sizeof(colormap))) | |
4394 | return -EFAULT; | |
1da177e4 | 4395 | |
ac751efa | 4396 | console_lock(); |
871bdea6 MG |
4397 | for (i = k = 0; i < 16; i++) { |
4398 | default_red[i] = colormap[k++]; | |
4399 | default_grn[i] = colormap[k++]; | |
4400 | default_blu[i] = colormap[k++]; | |
4401 | } | |
4402 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
4403 | if (!vc_cons_allocated(i)) | |
4404 | continue; | |
4405 | for (j = k = 0; j < 16; j++) { | |
4406 | vc_cons[i].d->vc_palette[k++] = default_red[j]; | |
4407 | vc_cons[i].d->vc_palette[k++] = default_grn[j]; | |
4408 | vc_cons[i].d->vc_palette[k++] = default_blu[j]; | |
4409 | } | |
4410 | set_palette(vc_cons[i].d); | |
4411 | } | |
ac751efa | 4412 | console_unlock(); |
1da177e4 | 4413 | |
871bdea6 | 4414 | return 0; |
1da177e4 LT |
4415 | } |
4416 | ||
4417 | int con_get_cmap(unsigned char __user *arg) | |
4418 | { | |
871bdea6 MG |
4419 | int i, k; |
4420 | unsigned char colormap[3*16]; | |
1da177e4 | 4421 | |
ac751efa | 4422 | console_lock(); |
871bdea6 MG |
4423 | for (i = k = 0; i < 16; i++) { |
4424 | colormap[k++] = default_red[i]; | |
4425 | colormap[k++] = default_grn[i]; | |
4426 | colormap[k++] = default_blu[i]; | |
4427 | } | |
ac751efa | 4428 | console_unlock(); |
1da177e4 | 4429 | |
871bdea6 MG |
4430 | if (copy_to_user(arg, colormap, sizeof(colormap))) |
4431 | return -EFAULT; | |
4432 | ||
4433 | return 0; | |
1da177e4 LT |
4434 | } |
4435 | ||
4436 | void reset_palette(struct vc_data *vc) | |
4437 | { | |
4438 | int j, k; | |
4439 | for (j=k=0; j<16; j++) { | |
4440 | vc->vc_palette[k++] = default_red[j]; | |
4441 | vc->vc_palette[k++] = default_grn[j]; | |
4442 | vc->vc_palette[k++] = default_blu[j]; | |
4443 | } | |
4444 | set_palette(vc); | |
4445 | } | |
4446 | ||
4447 | /* | |
4448 | * Font switching | |
4449 | * | |
4450 | * Currently we only support fonts up to 32 pixels wide, at a maximum height | |
4451 | * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, | |
4452 | * depending on width) reserved for each character which is kinda wasty, but | |
4453 | * this is done in order to maintain compatibility with the EGA/VGA fonts. It | |
25985edc | 4454 | * is up to the actual low-level console-driver convert data into its favorite |
1da177e4 LT |
4455 | * format (maybe we should add a `fontoffset' field to the `display' |
4456 | * structure so we won't have to convert the fontdata all the time. | |
4457 | * /Jes | |
4458 | */ | |
4459 | ||
4460 | #define max_font_size 65536 | |
4461 | ||
4462 | static int con_font_get(struct vc_data *vc, struct console_font_op *op) | |
4463 | { | |
4464 | struct console_font font; | |
4465 | int rc = -EINVAL; | |
4466 | int c; | |
4467 | ||
1da177e4 LT |
4468 | if (op->data) { |
4469 | font.data = kmalloc(max_font_size, GFP_KERNEL); | |
4470 | if (!font.data) | |
4471 | return -ENOMEM; | |
4472 | } else | |
4473 | font.data = NULL; | |
4474 | ||
ac751efa | 4475 | console_lock(); |
edab558f AC |
4476 | if (vc->vc_mode != KD_TEXT) |
4477 | rc = -EINVAL; | |
4478 | else if (vc->vc_sw->con_font_get) | |
1da177e4 LT |
4479 | rc = vc->vc_sw->con_font_get(vc, &font); |
4480 | else | |
4481 | rc = -ENOSYS; | |
ac751efa | 4482 | console_unlock(); |
1da177e4 LT |
4483 | |
4484 | if (rc) | |
4485 | goto out; | |
4486 | ||
4487 | c = (font.width+7)/8 * 32 * font.charcount; | |
04f378b1 | 4488 | |
1da177e4 LT |
4489 | if (op->data && font.charcount > op->charcount) |
4490 | rc = -ENOSPC; | |
4491 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
4492 | if (font.width > op->width || font.height > op->height) | |
4493 | rc = -ENOSPC; | |
4494 | } else { | |
4495 | if (font.width != 8) | |
4496 | rc = -EIO; | |
4497 | else if ((op->height && font.height > op->height) || | |
4498 | font.height > 32) | |
4499 | rc = -ENOSPC; | |
4500 | } | |
4501 | if (rc) | |
4502 | goto out; | |
4503 | ||
4504 | op->height = font.height; | |
4505 | op->width = font.width; | |
4506 | op->charcount = font.charcount; | |
4507 | ||
4508 | if (op->data && copy_to_user(op->data, font.data, c)) | |
4509 | rc = -EFAULT; | |
4510 | ||
4511 | out: | |
4512 | kfree(font.data); | |
4513 | return rc; | |
4514 | } | |
4515 | ||
4516 | static int con_font_set(struct vc_data *vc, struct console_font_op *op) | |
4517 | { | |
4518 | struct console_font font; | |
4519 | int rc = -EINVAL; | |
4520 | int size; | |
4521 | ||
4522 | if (vc->vc_mode != KD_TEXT) | |
4523 | return -EINVAL; | |
4524 | if (!op->data) | |
4525 | return -EINVAL; | |
4526 | if (op->charcount > 512) | |
4527 | return -EINVAL; | |
8ffb8209 MX |
4528 | if (op->width <= 0 || op->width > 32 || op->height > 32) |
4529 | return -EINVAL; | |
4530 | size = (op->width+7)/8 * 32 * op->charcount; | |
4531 | if (size > max_font_size) | |
4532 | return -ENOSPC; | |
4533 | ||
4534 | font.data = memdup_user(op->data, size); | |
4535 | if (IS_ERR(font.data)) | |
4536 | return PTR_ERR(font.data); | |
4537 | ||
1da177e4 LT |
4538 | if (!op->height) { /* Need to guess font height [compat] */ |
4539 | int h, i; | |
8ffb8209 MX |
4540 | u8 *charmap = font.data; |
4541 | ||
4542 | /* | |
4543 | * If from KDFONTOP ioctl, don't allow things which can be done | |
4544 | * in userland,so that we can get rid of this soon | |
4545 | */ | |
4546 | if (!(op->flags & KD_FONT_FLAG_OLD)) { | |
4547 | kfree(font.data); | |
1da177e4 | 4548 | return -EINVAL; |
8ffb8209 MX |
4549 | } |
4550 | ||
1da177e4 | 4551 | for (h = 32; h > 0; h--) |
8ffb8209 MX |
4552 | for (i = 0; i < op->charcount; i++) |
4553 | if (charmap[32*i+h-1]) | |
1da177e4 | 4554 | goto nonzero; |
8ffb8209 MX |
4555 | |
4556 | kfree(font.data); | |
1da177e4 | 4557 | return -EINVAL; |
8ffb8209 | 4558 | |
1da177e4 LT |
4559 | nonzero: |
4560 | op->height = h; | |
4561 | } | |
8ffb8209 | 4562 | |
1da177e4 | 4563 | font.charcount = op->charcount; |
1da177e4 | 4564 | font.width = op->width; |
8ffb8209 MX |
4565 | font.height = op->height; |
4566 | ||
ac751efa | 4567 | console_lock(); |
edab558f AC |
4568 | if (vc->vc_mode != KD_TEXT) |
4569 | rc = -EINVAL; | |
4570 | else if (vc->vc_sw->con_font_set) | |
1da177e4 LT |
4571 | rc = vc->vc_sw->con_font_set(vc, &font, op->flags); |
4572 | else | |
4573 | rc = -ENOSYS; | |
ac751efa | 4574 | console_unlock(); |
1da177e4 LT |
4575 | kfree(font.data); |
4576 | return rc; | |
4577 | } | |
4578 | ||
4579 | static int con_font_default(struct vc_data *vc, struct console_font_op *op) | |
4580 | { | |
4581 | struct console_font font = {.width = op->width, .height = op->height}; | |
4582 | char name[MAX_FONT_NAME]; | |
4583 | char *s = name; | |
4584 | int rc; | |
4585 | ||
1da177e4 LT |
4586 | |
4587 | if (!op->data) | |
4588 | s = NULL; | |
4589 | else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) | |
4590 | return -EFAULT; | |
4591 | else | |
4592 | name[MAX_FONT_NAME - 1] = 0; | |
4593 | ||
ac751efa | 4594 | console_lock(); |
edab558f AC |
4595 | if (vc->vc_mode != KD_TEXT) { |
4596 | console_unlock(); | |
4597 | return -EINVAL; | |
4598 | } | |
1da177e4 LT |
4599 | if (vc->vc_sw->con_font_default) |
4600 | rc = vc->vc_sw->con_font_default(vc, &font, s); | |
4601 | else | |
4602 | rc = -ENOSYS; | |
ac751efa | 4603 | console_unlock(); |
1da177e4 LT |
4604 | if (!rc) { |
4605 | op->width = font.width; | |
4606 | op->height = font.height; | |
4607 | } | |
4608 | return rc; | |
4609 | } | |
4610 | ||
4611 | static int con_font_copy(struct vc_data *vc, struct console_font_op *op) | |
4612 | { | |
4613 | int con = op->height; | |
4614 | int rc; | |
4615 | ||
1da177e4 | 4616 | |
ac751efa | 4617 | console_lock(); |
edab558f AC |
4618 | if (vc->vc_mode != KD_TEXT) |
4619 | rc = -EINVAL; | |
4620 | else if (!vc->vc_sw->con_font_copy) | |
1da177e4 LT |
4621 | rc = -ENOSYS; |
4622 | else if (con < 0 || !vc_cons_allocated(con)) | |
4623 | rc = -ENOTTY; | |
4624 | else if (con == vc->vc_num) /* nothing to do */ | |
4625 | rc = 0; | |
4626 | else | |
4627 | rc = vc->vc_sw->con_font_copy(vc, con); | |
ac751efa | 4628 | console_unlock(); |
1da177e4 LT |
4629 | return rc; |
4630 | } | |
4631 | ||
4632 | int con_font_op(struct vc_data *vc, struct console_font_op *op) | |
4633 | { | |
4634 | switch (op->op) { | |
4635 | case KD_FONT_OP_SET: | |
4636 | return con_font_set(vc, op); | |
4637 | case KD_FONT_OP_GET: | |
4638 | return con_font_get(vc, op); | |
4639 | case KD_FONT_OP_SET_DEFAULT: | |
4640 | return con_font_default(vc, op); | |
4641 | case KD_FONT_OP_COPY: | |
4642 | return con_font_copy(vc, op); | |
4643 | } | |
4644 | return -ENOSYS; | |
4645 | } | |
4646 | ||
4647 | /* | |
4648 | * Interface exported to selection and vcs. | |
4649 | */ | |
4650 | ||
4651 | /* used by selection */ | |
4652 | u16 screen_glyph(struct vc_data *vc, int offset) | |
4653 | { | |
4654 | u16 w = scr_readw(screenpos(vc, offset, 1)); | |
4655 | u16 c = w & 0xff; | |
4656 | ||
4657 | if (w & vc->vc_hi_font_mask) | |
4658 | c |= 0x100; | |
4659 | return c; | |
4660 | } | |
f7511d5f | 4661 | EXPORT_SYMBOL_GPL(screen_glyph); |
1da177e4 | 4662 | |
9bfdc261 AB |
4663 | u32 screen_glyph_unicode(struct vc_data *vc, int n) |
4664 | { | |
4665 | struct uni_screen *uniscr = get_vc_uniscr(vc); | |
4666 | ||
4667 | if (uniscr) | |
4668 | return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; | |
4669 | return inverse_translate(vc, screen_glyph(vc, n * 2), 1); | |
4670 | } | |
4671 | EXPORT_SYMBOL_GPL(screen_glyph_unicode); | |
4672 | ||
1da177e4 LT |
4673 | /* used by vcs - note the word offset */ |
4674 | unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) | |
4675 | { | |
4676 | return screenpos(vc, 2 * w_offset, viewed); | |
4677 | } | |
88867e3d | 4678 | EXPORT_SYMBOL_GPL(screen_pos); |
1da177e4 LT |
4679 | |
4680 | void getconsxy(struct vc_data *vc, unsigned char *p) | |
4681 | { | |
8a085494 NP |
4682 | /* clamp values if they don't fit */ |
4683 | p[0] = min(vc->vc_x, 0xFFu); | |
4684 | p[1] = min(vc->vc_y, 0xFFu); | |
1da177e4 LT |
4685 | } |
4686 | ||
4687 | void putconsxy(struct vc_data *vc, unsigned char *p) | |
4688 | { | |
9477e260 | 4689 | hide_cursor(vc); |
1da177e4 LT |
4690 | gotoxy(vc, p[0], p[1]); |
4691 | set_cursor(vc); | |
4692 | } | |
4693 | ||
4694 | u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) | |
4695 | { | |
4696 | if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) | |
4697 | return softcursor_original; | |
4698 | return scr_readw(org); | |
4699 | } | |
4700 | ||
4701 | void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) | |
4702 | { | |
4703 | scr_writew(val, org); | |
4704 | if ((unsigned long)org == vc->vc_pos) { | |
4705 | softcursor_original = -1; | |
4706 | add_softcursor(vc); | |
4707 | } | |
4708 | } | |
4709 | ||
432c9ed2 NP |
4710 | void vcs_scr_updated(struct vc_data *vc) |
4711 | { | |
4712 | notify_update(vc); | |
4713 | } | |
4714 | ||
35cc56f9 JS |
4715 | void vc_scrolldelta_helper(struct vc_data *c, int lines, |
4716 | unsigned int rolled_over, void *base, unsigned int size) | |
4717 | { | |
4718 | unsigned long ubase = (unsigned long)base; | |
210fd746 JS |
4719 | ptrdiff_t scr_end = (void *)c->vc_scr_end - base; |
4720 | ptrdiff_t vorigin = (void *)c->vc_visible_origin - base; | |
4721 | ptrdiff_t origin = (void *)c->vc_origin - base; | |
35cc56f9 | 4722 | int margin = c->vc_size_row * 4; |
7c918cdc | 4723 | int from, wrap, from_off, avail; |
35cc56f9 JS |
4724 | |
4725 | /* Turn scrollback off */ | |
4726 | if (!lines) { | |
4727 | c->vc_visible_origin = c->vc_origin; | |
4728 | return; | |
4729 | } | |
4730 | ||
4731 | /* Do we have already enough to allow jumping from 0 to the end? */ | |
210fd746 | 4732 | if (rolled_over > scr_end + margin) { |
7c918cdc JS |
4733 | from = scr_end; |
4734 | wrap = rolled_over + c->vc_size_row; | |
35cc56f9 | 4735 | } else { |
7c918cdc JS |
4736 | from = 0; |
4737 | wrap = size; | |
35cc56f9 JS |
4738 | } |
4739 | ||
7c918cdc JS |
4740 | from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; |
4741 | avail = (origin - from + wrap) % wrap; | |
35cc56f9 JS |
4742 | |
4743 | /* Only a little piece would be left? Show all incl. the piece! */ | |
7c918cdc | 4744 | if (avail < 2 * margin) |
35cc56f9 | 4745 | margin = 0; |
7c918cdc JS |
4746 | if (from_off < margin) |
4747 | from_off = 0; | |
4748 | if (from_off > avail - margin) | |
4749 | from_off = avail; | |
35cc56f9 | 4750 | |
7c918cdc | 4751 | c->vc_visible_origin = ubase + (from + from_off) % wrap; |
35cc56f9 JS |
4752 | } |
4753 | EXPORT_SYMBOL_GPL(vc_scrolldelta_helper); | |
4754 | ||
1da177e4 LT |
4755 | /* |
4756 | * Visible symbols for modules | |
4757 | */ | |
4758 | ||
4759 | EXPORT_SYMBOL(color_table); | |
4760 | EXPORT_SYMBOL(default_red); | |
4761 | EXPORT_SYMBOL(default_grn); | |
4762 | EXPORT_SYMBOL(default_blu); | |
4763 | EXPORT_SYMBOL(update_region); | |
4764 | EXPORT_SYMBOL(redraw_screen); | |
4765 | EXPORT_SYMBOL(vc_resize); | |
4766 | EXPORT_SYMBOL(fg_console); | |
4767 | EXPORT_SYMBOL(console_blank_hook); | |
4768 | EXPORT_SYMBOL(console_blanked); | |
4769 | EXPORT_SYMBOL(vc_cons); | |
f6c06b68 | 4770 | EXPORT_SYMBOL(global_cursor_default); |
1da177e4 | 4771 | #ifndef VT_SINGLE_DRIVER |
1da177e4 LT |
4772 | EXPORT_SYMBOL(give_up_console); |
4773 | #endif |