1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #include <linux/module.h>
60 #include <linux/types.h>
61 #include <linux/fs.h>
62 #include <linux/kernel.h>
63 #include <linux/delay.h> /* MSch: for IRQ probe */
64 #include <linux/console.h>
65 #include <linux/string.h>
66 #include <linux/kd.h>
67 #include <linux/panic.h>
68 #include <linux/printk.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/fbcon.h>
72 #include <linux/vt_kern.h>
73 #include <linux/selection.h>
74 #include <linux/font.h>
75 #include <linux/smp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/crc32.h> /* For counting font checksums */
79 #include <linux/uaccess.h>
80 #include <asm/irq.h>
81
82 #include "fbcon.h"
83 #include "fb_internal.h"
84
85 /*
86 * FIXME: Locking
87 *
88 * - fbcon state itself is protected by the console_lock, and the code does a
89 * pretty good job at making sure that lock is held everywhere it's needed.
90 *
91 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
92 * means concurrent access to the same fbdev from both fbcon and userspace
93 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
94 * of fb_lock/unlock protected sections, since otherwise we'll recurse and
95 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
96 * fbmem.c cannot use locking asserts, and there's lots of callers which get
97 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
98 */
99
100 enum {
101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
104 };
105
106 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
107
108 static struct fb_info *fbcon_registered_fb[FB_MAX];
109 static int fbcon_num_registered_fb;
110
111 #define fbcon_for_each_registered_fb(i) \
112 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \
113 if (!fbcon_registered_fb[i]) {} else
114
115 static signed char con2fb_map[MAX_NR_CONSOLES];
116 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
117
fbcon_info_from_console(int console)118 static struct fb_info *fbcon_info_from_console(int console)
119 {
120 signed char fb;
121 WARN_CONSOLE_UNLOCKED();
122
123 fb = con2fb_map[console];
124 if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb))
125 return NULL;
126
127 return fbcon_registered_fb[fb];
128 }
129
130 static int logo_lines;
131 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
132 enums. */
133 static int logo_shown = FBCON_LOGO_CANSHOW;
134 /* console mappings */
135 static unsigned int first_fb_vc;
136 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
137 static int fbcon_is_default = 1;
138 static int primary_device = -1;
139 static int fbcon_has_console_bind;
140
141 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
142 static int map_override;
143
fbcon_map_override(void)144 static inline void fbcon_map_override(void)
145 {
146 map_override = 1;
147 }
148 #else
fbcon_map_override(void)149 static inline void fbcon_map_override(void)
150 {
151 }
152 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
153
154 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
155 static bool deferred_takeover = true;
156 #else
157 #define deferred_takeover false
158 #endif
159
160 /* font data */
161 static char fontname[40];
162
163 /* current fb_info */
164 static int info_idx = -1;
165
166 /* console rotation */
167 static int initial_rotation = -1;
168 static int fbcon_has_sysfs;
169 static int margin_color;
170
171 static const struct consw fb_con;
172
173 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
174
175 static int fbcon_cursor_noblink;
176
177 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
178
179 /*
180 * Interface used by the world
181 */
182
183 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
184 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
185
186 /*
187 * Internal routines
188 */
189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 int unit);
191 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
192 int line, int count, int dy);
193 static void fbcon_modechanged(struct fb_info *info);
194 static void fbcon_set_all_vcs(struct fb_info *info);
195
196 static struct device *fbcon_device;
197
198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
fbcon_set_rotation(struct fb_info * info)199 static inline void fbcon_set_rotation(struct fb_info *info)
200 {
201 struct fbcon_ops *ops = info->fbcon_par;
202
203 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
204 ops->p->con_rotate < 4)
205 ops->rotate = ops->p->con_rotate;
206 else
207 ops->rotate = 0;
208 }
209
fbcon_rotate(struct fb_info * info,u32 rotate)210 static void fbcon_rotate(struct fb_info *info, u32 rotate)
211 {
212 struct fbcon_ops *ops= info->fbcon_par;
213 struct fb_info *fb_info;
214
215 if (!ops || ops->currcon == -1)
216 return;
217
218 fb_info = fbcon_info_from_console(ops->currcon);
219
220 if (info == fb_info) {
221 struct fbcon_display *p = &fb_display[ops->currcon];
222
223 if (rotate < 4)
224 p->con_rotate = rotate;
225 else
226 p->con_rotate = 0;
227
228 fbcon_modechanged(info);
229 }
230 }
231
fbcon_rotate_all(struct fb_info * info,u32 rotate)232 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
233 {
234 struct fbcon_ops *ops = info->fbcon_par;
235 struct vc_data *vc;
236 struct fbcon_display *p;
237 int i;
238
239 if (!ops || ops->currcon < 0 || rotate > 3)
240 return;
241
242 for (i = first_fb_vc; i <= last_fb_vc; i++) {
243 vc = vc_cons[i].d;
244 if (!vc || vc->vc_mode != KD_TEXT ||
245 fbcon_info_from_console(i) != info)
246 continue;
247
248 p = &fb_display[vc->vc_num];
249 p->con_rotate = rotate;
250 }
251
252 fbcon_set_all_vcs(info);
253 }
254 #else
fbcon_set_rotation(struct fb_info * info)255 static inline void fbcon_set_rotation(struct fb_info *info)
256 {
257 struct fbcon_ops *ops = info->fbcon_par;
258
259 ops->rotate = FB_ROTATE_UR;
260 }
261
fbcon_rotate(struct fb_info * info,u32 rotate)262 static void fbcon_rotate(struct fb_info *info, u32 rotate)
263 {
264 return;
265 }
266
fbcon_rotate_all(struct fb_info * info,u32 rotate)267 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
268 {
269 return;
270 }
271 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
272
fbcon_get_rotate(struct fb_info * info)273 static int fbcon_get_rotate(struct fb_info *info)
274 {
275 struct fbcon_ops *ops = info->fbcon_par;
276
277 return (ops) ? ops->rotate : 0;
278 }
279
fbcon_skip_panic(struct fb_info * info)280 static bool fbcon_skip_panic(struct fb_info *info)
281 {
282 /* panic_cpu is not exported, and can't be used if built as module. Use
283 * oops_in_progress instead, but non-fatal oops won't be printed.
284 */
285 #if defined(MODULE)
286 return (info->skip_panic && unlikely(oops_in_progress));
287 #else
288 return (info->skip_panic && unlikely(atomic_read(&panic_cpu) != PANIC_CPU_INVALID));
289 #endif
290 }
291
fbcon_is_inactive(struct vc_data * vc,struct fb_info * info)292 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
293 {
294 struct fbcon_ops *ops = info->fbcon_par;
295
296 return (info->state != FBINFO_STATE_RUNNING ||
297 vc->vc_mode != KD_TEXT || ops->graphics || fbcon_skip_panic(info));
298 }
299
get_color(struct vc_data * vc,struct fb_info * info,u16 c,int is_fg)300 static int get_color(struct vc_data *vc, struct fb_info *info,
301 u16 c, int is_fg)
302 {
303 int depth = fb_get_color_depth(&info->var, &info->fix);
304 int color = 0;
305
306 if (console_blanked) {
307 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
308
309 c = vc->vc_video_erase_char & charmask;
310 }
311
312 if (depth != 1)
313 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
314 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
315
316 switch (depth) {
317 case 1:
318 {
319 int col = mono_col(info);
320 /* 0 or 1 */
321 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
322 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
323
324 if (console_blanked)
325 fg = bg;
326
327 color = (is_fg) ? fg : bg;
328 break;
329 }
330 case 2:
331 /*
332 * Scale down 16-colors to 4 colors. Default 4-color palette
333 * is grayscale. However, simply dividing the values by 4
334 * will not work, as colors 1, 2 and 3 will be scaled-down
335 * to zero rendering them invisible. So empirically convert
336 * colors to a sane 4-level grayscale.
337 */
338 switch (color) {
339 case 0:
340 color = 0; /* black */
341 break;
342 case 1 ... 6:
343 color = 2; /* white */
344 break;
345 case 7 ... 8:
346 color = 1; /* gray */
347 break;
348 default:
349 color = 3; /* intense white */
350 break;
351 }
352 break;
353 case 3:
354 /*
355 * Last 8 entries of default 16-color palette is a more intense
356 * version of the first 8 (i.e., same chrominance, different
357 * luminance).
358 */
359 color &= 7;
360 break;
361 }
362
363
364 return color;
365 }
366
fb_flashcursor(struct work_struct * work)367 static void fb_flashcursor(struct work_struct *work)
368 {
369 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work);
370 struct fb_info *info;
371 struct vc_data *vc = NULL;
372 int c;
373 bool enable;
374 int ret;
375
376 /* FIXME: we should sort out the unbind locking instead */
377 /* instead we just fail to flash the cursor if we can't get
378 * the lock instead of blocking fbcon deinit */
379 ret = console_trylock();
380 if (ret == 0)
381 return;
382
383 /* protected by console_lock */
384 info = ops->info;
385
386 if (ops->currcon != -1)
387 vc = vc_cons[ops->currcon].d;
388
389 if (!vc || !con_is_visible(vc) ||
390 fbcon_info_from_console(vc->vc_num) != info ||
391 vc->vc_deccm != 1) {
392 console_unlock();
393 return;
394 }
395
396 c = scr_readw((u16 *) vc->vc_pos);
397 enable = ops->cursor_flash && !ops->cursor_state.enable;
398 ops->cursor(vc, info, enable, get_color(vc, info, c, 1),
399 get_color(vc, info, c, 0));
400 console_unlock();
401
402 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
403 ops->cur_blink_jiffies);
404 }
405
fbcon_add_cursor_work(struct fb_info * info)406 static void fbcon_add_cursor_work(struct fb_info *info)
407 {
408 struct fbcon_ops *ops = info->fbcon_par;
409
410 if (!fbcon_cursor_noblink)
411 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
412 ops->cur_blink_jiffies);
413 }
414
fbcon_del_cursor_work(struct fb_info * info)415 static void fbcon_del_cursor_work(struct fb_info *info)
416 {
417 struct fbcon_ops *ops = info->fbcon_par;
418
419 cancel_delayed_work_sync(&ops->cursor_work);
420 }
421
422 #ifndef MODULE
fb_console_setup(char * this_opt)423 static int __init fb_console_setup(char *this_opt)
424 {
425 char *options;
426 int i, j;
427
428 if (!this_opt || !*this_opt)
429 return 1;
430
431 while ((options = strsep(&this_opt, ",")) != NULL) {
432 if (!strncmp(options, "font:", 5)) {
433 strscpy(fontname, options + 5, sizeof(fontname));
434 continue;
435 }
436
437 if (!strncmp(options, "scrollback:", 11)) {
438 pr_warn("Ignoring scrollback size option\n");
439 continue;
440 }
441
442 if (!strncmp(options, "map:", 4)) {
443 options += 4;
444 if (*options) {
445 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
446 if (!options[j])
447 j = 0;
448 con2fb_map_boot[i] =
449 (options[j++]-'0') % FB_MAX;
450 }
451
452 fbcon_map_override();
453 }
454 continue;
455 }
456
457 if (!strncmp(options, "vc:", 3)) {
458 options += 3;
459 if (*options)
460 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
461 if (first_fb_vc >= MAX_NR_CONSOLES)
462 first_fb_vc = 0;
463 if (*options++ == '-')
464 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
465 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
466 last_fb_vc = MAX_NR_CONSOLES - 1;
467 fbcon_is_default = 0;
468 continue;
469 }
470
471 if (!strncmp(options, "rotate:", 7)) {
472 options += 7;
473 if (*options)
474 initial_rotation = simple_strtoul(options, &options, 0);
475 if (initial_rotation > 3)
476 initial_rotation = 0;
477 continue;
478 }
479
480 if (!strncmp(options, "margin:", 7)) {
481 options += 7;
482 if (*options)
483 margin_color = simple_strtoul(options, &options, 0);
484 continue;
485 }
486 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
487 if (!strcmp(options, "nodefer")) {
488 deferred_takeover = false;
489 continue;
490 }
491 #endif
492
493 #ifdef CONFIG_LOGO
494 if (!strncmp(options, "logo-pos:", 9)) {
495 options += 9;
496 if (!strcmp(options, "center"))
497 fb_center_logo = true;
498 continue;
499 }
500
501 if (!strncmp(options, "logo-count:", 11)) {
502 options += 11;
503 if (*options)
504 fb_logo_count = simple_strtol(options, &options, 0);
505 continue;
506 }
507 #endif
508 }
509 return 1;
510 }
511
512 __setup("fbcon=", fb_console_setup);
513 #endif
514
search_fb_in_map(int idx)515 static int search_fb_in_map(int idx)
516 {
517 int i, retval = 0;
518
519 for (i = first_fb_vc; i <= last_fb_vc; i++) {
520 if (con2fb_map[i] == idx) {
521 retval = 1;
522 break;
523 }
524 }
525 return retval;
526 }
527
search_for_mapped_con(void)528 static int search_for_mapped_con(void)
529 {
530 int i, retval = 0;
531
532 for (i = first_fb_vc; i <= last_fb_vc; i++) {
533 if (con2fb_map[i] != -1) {
534 retval = 1;
535 break;
536 }
537 }
538 return retval;
539 }
540
do_fbcon_takeover(int show_logo)541 static int do_fbcon_takeover(int show_logo)
542 {
543 int err, i;
544
545 if (!fbcon_num_registered_fb)
546 return -ENODEV;
547
548 if (!show_logo)
549 logo_shown = FBCON_LOGO_DONTSHOW;
550
551 for (i = first_fb_vc; i <= last_fb_vc; i++)
552 con2fb_map[i] = info_idx;
553
554 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
555 fbcon_is_default);
556
557 if (err) {
558 for (i = first_fb_vc; i <= last_fb_vc; i++)
559 con2fb_map[i] = -1;
560 info_idx = -1;
561 } else {
562 fbcon_has_console_bind = 1;
563 }
564
565 return err;
566 }
567
568 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)569 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
570 int cols, int rows, int new_cols, int new_rows)
571 {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 }
574 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
576 int cols, int rows, int new_cols, int new_rows)
577 {
578 /* Need to make room for the logo */
579 struct fbcon_ops *ops = info->fbcon_par;
580 int cnt, erase = vc->vc_video_erase_char, step;
581 unsigned short *save = NULL, *r, *q;
582 int logo_height;
583
584 if (info->fbops->owner) {
585 logo_shown = FBCON_LOGO_DONTSHOW;
586 return;
587 }
588
589 /*
590 * remove underline attribute from erase character
591 * if black and white framebuffer.
592 */
593 if (fb_get_color_depth(&info->var, &info->fix) == 1)
594 erase &= ~0x400;
595 logo_height = fb_prepare_logo(info, ops->rotate);
596 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kmalloc(array3_size(logo_lines, new_cols, 2),
605 GFP_KERNEL);
606 if (save) {
607 int i = min(cols, new_cols);
608 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
609 r = q - step;
610 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
611 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
612 r = q;
613 }
614 }
615 if (r == q) {
616 /* We can scroll screen down */
617 r = q - step - cols;
618 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
619 scr_memcpyw(r + step, r, vc->vc_size_row);
620 r -= cols;
621 }
622 if (!save) {
623 int lines;
624 if (vc->state.y + logo_lines >= rows)
625 lines = rows - vc->state.y - 1;
626 else
627 lines = logo_lines;
628 vc->state.y += lines;
629 vc->vc_pos += lines * vc->vc_size_row;
630 }
631 }
632 scr_memsetw((unsigned short *) vc->vc_origin,
633 erase,
634 vc->vc_size_row * logo_lines);
635
636 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
637 fbcon_clear_margins(vc, 0);
638 update_screen(vc);
639 }
640
641 if (save) {
642 q = (unsigned short *) (vc->vc_origin +
643 vc->vc_size_row *
644 rows);
645 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
646 vc->state.y += logo_lines;
647 vc->vc_pos += logo_lines * vc->vc_size_row;
648 kfree(save);
649 }
650
651 if (logo_shown == FBCON_LOGO_DONTSHOW)
652 return;
653
654 if (logo_lines > vc->vc_bottom) {
655 logo_shown = FBCON_LOGO_CANSHOW;
656 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n");
657 } else {
658 logo_shown = FBCON_LOGO_DRAW;
659 vc->vc_top = logo_lines;
660 }
661 }
662 #endif /* MODULE */
663
664 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)665 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
666 {
667 struct fbcon_ops *ops = info->fbcon_par;
668
669 ops->p = &fb_display[vc->vc_num];
670
671 if ((info->flags & FBINFO_MISC_TILEBLITTING))
672 fbcon_set_tileops(vc, info);
673 else {
674 fbcon_set_rotation(info);
675 fbcon_set_bitops(ops);
676 }
677 }
678
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)679 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
680 {
681 int err = 0;
682
683 if (info->flags & FBINFO_MISC_TILEBLITTING &&
684 info->tileops->fb_get_tilemax(info) < charcount)
685 err = 1;
686
687 return err;
688 }
689 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)690 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
691 {
692 struct fbcon_ops *ops = info->fbcon_par;
693
694 info->flags &= ~FBINFO_MISC_TILEBLITTING;
695 ops->p = &fb_display[vc->vc_num];
696 fbcon_set_rotation(info);
697 fbcon_set_bitops(ops);
698 }
699
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)700 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
701 {
702 return 0;
703 }
704
705 #endif /* CONFIG_MISC_TILEBLITTING */
706
fbcon_release(struct fb_info * info)707 static void fbcon_release(struct fb_info *info)
708 {
709 lock_fb_info(info);
710 if (info->fbops->fb_release)
711 info->fbops->fb_release(info, 0);
712 unlock_fb_info(info);
713
714 module_put(info->fbops->owner);
715
716 if (info->fbcon_par) {
717 struct fbcon_ops *ops = info->fbcon_par;
718
719 fbcon_del_cursor_work(info);
720 kfree(ops->cursor_state.mask);
721 kfree(ops->cursor_data);
722 kfree(ops->cursor_src);
723 kfree(ops->fontbuffer);
724 kfree(info->fbcon_par);
725 info->fbcon_par = NULL;
726 }
727 }
728
fbcon_open(struct fb_info * info)729 static int fbcon_open(struct fb_info *info)
730 {
731 struct fbcon_ops *ops;
732
733 if (!try_module_get(info->fbops->owner))
734 return -ENODEV;
735
736 lock_fb_info(info);
737 if (info->fbops->fb_open &&
738 info->fbops->fb_open(info, 0)) {
739 unlock_fb_info(info);
740 module_put(info->fbops->owner);
741 return -ENODEV;
742 }
743 unlock_fb_info(info);
744
745 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
746 if (!ops) {
747 fbcon_release(info);
748 return -ENOMEM;
749 }
750
751 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor);
752 ops->info = info;
753 info->fbcon_par = ops;
754 ops->cur_blink_jiffies = HZ / 5;
755
756 return 0;
757 }
758
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit)759 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
760 int unit)
761 {
762 int err;
763
764 err = fbcon_open(info);
765 if (err)
766 return err;
767
768 if (vc)
769 set_blitting_type(vc, info);
770
771 return err;
772 }
773
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo)774 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
775 struct fb_info *newinfo)
776 {
777 int ret;
778
779 fbcon_release(oldinfo);
780
781 /*
782 If oldinfo and newinfo are driving the same hardware,
783 the fb_release() method of oldinfo may attempt to
784 restore the hardware state. This will leave the
785 newinfo in an undefined state. Thus, a call to
786 fb_set_par() may be needed for the newinfo.
787 */
788 if (newinfo && newinfo->fbops->fb_set_par) {
789 ret = newinfo->fbops->fb_set_par(newinfo);
790
791 if (ret)
792 printk(KERN_ERR "con2fb_release_oldinfo: "
793 "detected unhandled fb_set_par error, "
794 "error code %d\n", ret);
795 }
796 }
797
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)798 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
799 int unit, int show_logo)
800 {
801 struct fbcon_ops *ops = info->fbcon_par;
802 int ret;
803
804 ops->currcon = fg_console;
805
806 if (info->fbops->fb_set_par && !ops->initialized) {
807 ret = info->fbops->fb_set_par(info);
808
809 if (ret)
810 printk(KERN_ERR "con2fb_init_display: detected "
811 "unhandled fb_set_par error, "
812 "error code %d\n", ret);
813 }
814
815 ops->initialized = true;
816 ops->graphics = 0;
817 fbcon_set_disp(info, &info->var, unit);
818
819 if (show_logo) {
820 struct vc_data *fg_vc = vc_cons[fg_console].d;
821 struct fb_info *fg_info =
822 fbcon_info_from_console(fg_console);
823
824 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
825 fg_vc->vc_rows, fg_vc->vc_cols,
826 fg_vc->vc_rows);
827 }
828
829 if (fg_console != unit)
830 update_screen(vc_cons[fg_console].d);
831 }
832
833 /**
834 * set_con2fb_map - map console to frame buffer device
835 * @unit: virtual console number to map
836 * @newidx: frame buffer index to map virtual console to
837 * @user: user request
838 *
839 * Maps a virtual console @unit to a frame buffer device
840 * @newidx.
841 *
842 * This should be called with the console lock held.
843 */
set_con2fb_map(int unit,int newidx,int user)844 static int set_con2fb_map(int unit, int newidx, int user)
845 {
846 struct vc_data *vc = vc_cons[unit].d;
847 int oldidx = con2fb_map[unit];
848 struct fb_info *info = fbcon_registered_fb[newidx];
849 struct fb_info *oldinfo = NULL;
850 int err = 0, show_logo;
851
852 WARN_CONSOLE_UNLOCKED();
853
854 if (oldidx == newidx)
855 return 0;
856
857 if (!info)
858 return -EINVAL;
859
860 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
861 info_idx = newidx;
862 return do_fbcon_takeover(0);
863 }
864
865 if (oldidx != -1)
866 oldinfo = fbcon_registered_fb[oldidx];
867
868 if (!search_fb_in_map(newidx)) {
869 err = con2fb_acquire_newinfo(vc, info, unit);
870 if (err)
871 return err;
872
873 fbcon_add_cursor_work(info);
874 } else if (vc) {
875 set_blitting_type(vc, info);
876 }
877
878 con2fb_map[unit] = newidx;
879
880 /*
881 * If old fb is not mapped to any of the consoles,
882 * fbcon should release it.
883 */
884 if (oldinfo && !search_fb_in_map(oldidx))
885 con2fb_release_oldinfo(vc, oldinfo, info);
886
887 show_logo = (fg_console == 0 && !user &&
888 logo_shown != FBCON_LOGO_DONTSHOW);
889
890 con2fb_map_boot[unit] = newidx;
891 con2fb_init_display(vc, info, unit, show_logo);
892
893 if (!search_fb_in_map(info_idx))
894 info_idx = newidx;
895
896 return err;
897 }
898
899 /*
900 * Low Level Operations
901 */
902 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
var_to_display(struct fbcon_display * disp,struct fb_var_screeninfo * var,struct fb_info * info)903 static int var_to_display(struct fbcon_display *disp,
904 struct fb_var_screeninfo *var,
905 struct fb_info *info)
906 {
907 disp->xres_virtual = var->xres_virtual;
908 disp->yres_virtual = var->yres_virtual;
909 disp->bits_per_pixel = var->bits_per_pixel;
910 disp->grayscale = var->grayscale;
911 disp->nonstd = var->nonstd;
912 disp->accel_flags = var->accel_flags;
913 disp->height = var->height;
914 disp->width = var->width;
915 disp->red = var->red;
916 disp->green = var->green;
917 disp->blue = var->blue;
918 disp->transp = var->transp;
919 disp->rotate = var->rotate;
920 disp->mode = fb_match_mode(var, &info->modelist);
921 if (disp->mode == NULL)
922 /* This should not happen */
923 return -EINVAL;
924 return 0;
925 }
926
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)927 static void display_to_var(struct fb_var_screeninfo *var,
928 struct fbcon_display *disp)
929 {
930 fb_videomode_to_var(var, disp->mode);
931 var->xres_virtual = disp->xres_virtual;
932 var->yres_virtual = disp->yres_virtual;
933 var->bits_per_pixel = disp->bits_per_pixel;
934 var->grayscale = disp->grayscale;
935 var->nonstd = disp->nonstd;
936 var->accel_flags = disp->accel_flags;
937 var->height = disp->height;
938 var->width = disp->width;
939 var->red = disp->red;
940 var->green = disp->green;
941 var->blue = disp->blue;
942 var->transp = disp->transp;
943 var->rotate = disp->rotate;
944 }
945
fbcon_startup(void)946 static const char *fbcon_startup(void)
947 {
948 static const char display_desc[] = "frame buffer device";
949 struct fbcon_display *p = &fb_display[fg_console];
950 struct vc_data *vc = vc_cons[fg_console].d;
951 const struct font_desc *font = NULL;
952 struct fb_info *info = NULL;
953 struct fbcon_ops *ops;
954 int rows, cols;
955
956 /*
957 * If fbcon_num_registered_fb is zero, this is a call for the dummy part.
958 * The frame buffer devices weren't initialized yet.
959 */
960 if (!fbcon_num_registered_fb || info_idx == -1)
961 return display_desc;
962 /*
963 * Instead of blindly using fbcon_registered_fb[0], we use info_idx, set by
964 * fbcon_fb_registered();
965 */
966 info = fbcon_registered_fb[info_idx];
967 if (!info)
968 return NULL;
969
970 if (fbcon_open(info))
971 return NULL;
972
973 ops = info->fbcon_par;
974 ops->currcon = -1;
975 ops->graphics = 1;
976 ops->cur_rotate = -1;
977
978 p->con_rotate = initial_rotation;
979 if (p->con_rotate == -1)
980 p->con_rotate = info->fbcon_rotate_hint;
981 if (p->con_rotate == -1)
982 p->con_rotate = FB_ROTATE_UR;
983
984 set_blitting_type(vc, info);
985
986 /* Setup default font */
987 if (!p->fontdata) {
988 if (!fontname[0] || !(font = find_font(fontname)))
989 font = get_default_font(info->var.xres,
990 info->var.yres,
991 info->pixmap.blit_x,
992 info->pixmap.blit_y);
993 vc->vc_font.width = font->width;
994 vc->vc_font.height = font->height;
995 vc->vc_font.data = (void *)(p->fontdata = font->data);
996 vc->vc_font.charcount = font->charcount;
997 }
998
999 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1000 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1001 cols /= vc->vc_font.width;
1002 rows /= vc->vc_font.height;
1003 vc_resize(vc, cols, rows);
1004
1005 pr_debug("mode: %s\n", info->fix.id);
1006 pr_debug("visual: %d\n", info->fix.visual);
1007 pr_debug("res: %dx%d-%d\n", info->var.xres,
1008 info->var.yres,
1009 info->var.bits_per_pixel);
1010
1011 fbcon_add_cursor_work(info);
1012 return display_desc;
1013 }
1014
fbcon_init(struct vc_data * vc,bool init)1015 static void fbcon_init(struct vc_data *vc, bool init)
1016 {
1017 struct fb_info *info;
1018 struct fbcon_ops *ops;
1019 struct vc_data **default_mode = vc->vc_display_fg;
1020 struct vc_data *svc = *default_mode;
1021 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1022 int logo = 1, new_rows, new_cols, rows, cols;
1023 int ret;
1024
1025 if (WARN_ON(info_idx == -1))
1026 return;
1027
1028 if (con2fb_map[vc->vc_num] == -1)
1029 con2fb_map[vc->vc_num] = info_idx;
1030
1031 info = fbcon_info_from_console(vc->vc_num);
1032
1033 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1034 logo_shown = FBCON_LOGO_DONTSHOW;
1035
1036 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1037 (info->fix.type == FB_TYPE_TEXT))
1038 logo = 0;
1039
1040 if (var_to_display(p, &info->var, info))
1041 return;
1042
1043 if (!info->fbcon_par)
1044 con2fb_acquire_newinfo(vc, info, vc->vc_num);
1045
1046 /* If we are not the first console on this
1047 fb, copy the font from that console */
1048 t = &fb_display[fg_console];
1049 if (!p->fontdata) {
1050 if (t->fontdata) {
1051 struct vc_data *fvc = vc_cons[fg_console].d;
1052
1053 vc->vc_font.data = (void *)(p->fontdata =
1054 fvc->vc_font.data);
1055 vc->vc_font.width = fvc->vc_font.width;
1056 vc->vc_font.height = fvc->vc_font.height;
1057 vc->vc_font.charcount = fvc->vc_font.charcount;
1058 p->userfont = t->userfont;
1059
1060 if (p->userfont)
1061 REFCOUNT(p->fontdata)++;
1062 } else {
1063 const struct font_desc *font = NULL;
1064
1065 if (!fontname[0] || !(font = find_font(fontname)))
1066 font = get_default_font(info->var.xres,
1067 info->var.yres,
1068 info->pixmap.blit_x,
1069 info->pixmap.blit_y);
1070 vc->vc_font.width = font->width;
1071 vc->vc_font.height = font->height;
1072 vc->vc_font.data = (void *)(p->fontdata = font->data);
1073 vc->vc_font.charcount = font->charcount;
1074 }
1075 }
1076
1077 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1078 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1079 if (vc->vc_font.charcount == 256) {
1080 vc->vc_hi_font_mask = 0;
1081 } else {
1082 vc->vc_hi_font_mask = 0x100;
1083 if (vc->vc_can_do_color)
1084 vc->vc_complement_mask <<= 1;
1085 }
1086
1087 if (!*svc->uni_pagedict_loc)
1088 con_set_default_unimap(svc);
1089 if (!*vc->uni_pagedict_loc)
1090 con_copy_unimap(vc, svc);
1091
1092 ops = info->fbcon_par;
1093 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1094
1095 p->con_rotate = initial_rotation;
1096 if (p->con_rotate == -1)
1097 p->con_rotate = info->fbcon_rotate_hint;
1098 if (p->con_rotate == -1)
1099 p->con_rotate = FB_ROTATE_UR;
1100
1101 set_blitting_type(vc, info);
1102
1103 cols = vc->vc_cols;
1104 rows = vc->vc_rows;
1105 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1106 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1107 new_cols /= vc->vc_font.width;
1108 new_rows /= vc->vc_font.height;
1109
1110 /*
1111 * We must always set the mode. The mode of the previous console
1112 * driver could be in the same resolution but we are using different
1113 * hardware so we have to initialize the hardware.
1114 *
1115 * We need to do it in fbcon_init() to prevent screen corruption.
1116 */
1117 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1118 if (info->fbops->fb_set_par && !ops->initialized) {
1119 ret = info->fbops->fb_set_par(info);
1120
1121 if (ret)
1122 printk(KERN_ERR "fbcon_init: detected "
1123 "unhandled fb_set_par error, "
1124 "error code %d\n", ret);
1125 }
1126
1127 ops->initialized = true;
1128 }
1129
1130 ops->graphics = 0;
1131
1132 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1133 if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
1134 !(info->flags & FBINFO_HWACCEL_DISABLED))
1135 p->scrollmode = SCROLL_MOVE;
1136 else /* default to something safe */
1137 p->scrollmode = SCROLL_REDRAW;
1138 #endif
1139
1140 /*
1141 * ++guenther: console.c:vc_allocate() relies on initializing
1142 * vc_{cols,rows}, but we must not set those if we are only
1143 * resizing the console.
1144 */
1145 if (init) {
1146 vc->vc_cols = new_cols;
1147 vc->vc_rows = new_rows;
1148 } else
1149 vc_resize(vc, new_cols, new_rows);
1150
1151 if (logo)
1152 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1153
1154 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1155 ops->rotate = FB_ROTATE_UR;
1156 set_blitting_type(vc, info);
1157 }
1158
1159 ops->p = &fb_display[fg_console];
1160 }
1161
fbcon_free_font(struct fbcon_display * p)1162 static void fbcon_free_font(struct fbcon_display *p)
1163 {
1164 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1165 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1166 p->fontdata = NULL;
1167 p->userfont = 0;
1168 }
1169
1170 static void set_vc_hi_font(struct vc_data *vc, bool set);
1171
fbcon_release_all(void)1172 static void fbcon_release_all(void)
1173 {
1174 struct fb_info *info;
1175 int i, j, mapped;
1176
1177 fbcon_for_each_registered_fb(i) {
1178 mapped = 0;
1179 info = fbcon_registered_fb[i];
1180
1181 for (j = first_fb_vc; j <= last_fb_vc; j++) {
1182 if (con2fb_map[j] == i) {
1183 mapped = 1;
1184 con2fb_map[j] = -1;
1185 }
1186 }
1187
1188 if (mapped)
1189 fbcon_release(info);
1190 }
1191 }
1192
fbcon_deinit(struct vc_data * vc)1193 static void fbcon_deinit(struct vc_data *vc)
1194 {
1195 struct fbcon_display *p = &fb_display[vc->vc_num];
1196 struct fb_info *info;
1197 struct fbcon_ops *ops;
1198 int idx;
1199
1200 fbcon_free_font(p);
1201 idx = con2fb_map[vc->vc_num];
1202
1203 if (idx == -1)
1204 goto finished;
1205
1206 info = fbcon_registered_fb[idx];
1207
1208 if (!info)
1209 goto finished;
1210
1211 ops = info->fbcon_par;
1212
1213 if (!ops)
1214 goto finished;
1215
1216 if (con_is_visible(vc))
1217 fbcon_del_cursor_work(info);
1218
1219 ops->initialized = false;
1220 finished:
1221
1222 fbcon_free_font(p);
1223 vc->vc_font.data = NULL;
1224
1225 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1226 set_vc_hi_font(vc, false);
1227
1228 if (!con_is_bound(&fb_con))
1229 fbcon_release_all();
1230
1231 if (vc->vc_num == logo_shown)
1232 logo_shown = FBCON_LOGO_CANSHOW;
1233
1234 return;
1235 }
1236
1237 /* ====================================================================== */
1238
1239 /* fbcon_XXX routines - interface used by the world
1240 *
1241 * This system is now divided into two levels because of complications
1242 * caused by hardware scrolling. Top level functions:
1243 *
1244 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1245 *
1246 * handles y values in range [0, scr_height-1] that correspond to real
1247 * screen positions. y_wrap shift means that first line of bitmap may be
1248 * anywhere on this display. These functions convert lineoffsets to
1249 * bitmap offsets and deal with the wrap-around case by splitting blits.
1250 *
1251 * fbcon_bmove_physical_8() -- These functions fast implementations
1252 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1253 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1254 *
1255 * WARNING:
1256 *
1257 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1258 * Implies should only really hardware scroll in rows. Only reason for
1259 * restriction is simplicity & efficiency at the moment.
1260 */
1261
__fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int height,unsigned int width)1262 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1263 unsigned int height, unsigned int width)
1264 {
1265 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1266 struct fbcon_ops *ops = info->fbcon_par;
1267 int fg, bg;
1268 struct fbcon_display *p = &fb_display[vc->vc_num];
1269 u_int y_break;
1270
1271 if (fbcon_is_inactive(vc, info))
1272 return;
1273
1274 if (!height || !width)
1275 return;
1276
1277 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1278 vc->vc_top = 0;
1279 /*
1280 * If the font dimensions are not an integral of the display
1281 * dimensions then the ops->clear below won't end up clearing
1282 * the margins. Call clear_margins here in case the logo
1283 * bitmap stretched into the margin area.
1284 */
1285 fbcon_clear_margins(vc, 0);
1286 }
1287
1288 fg = get_color(vc, info, vc->vc_video_erase_char, 1);
1289 bg = get_color(vc, info, vc->vc_video_erase_char, 0);
1290 /* Split blits that cross physical y_wrap boundary */
1291
1292 y_break = p->vrows - p->yscroll;
1293 if (sy < y_break && sy + height - 1 >= y_break) {
1294 u_int b = y_break - sy;
1295 ops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg);
1296 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1297 width, fg, bg);
1298 } else
1299 ops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg);
1300 }
1301
fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int width)1302 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1303 unsigned int width)
1304 {
1305 __fbcon_clear(vc, sy, sx, 1, width);
1306 }
1307
fbcon_putcs(struct vc_data * vc,const u16 * s,unsigned int count,unsigned int ypos,unsigned int xpos)1308 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count,
1309 unsigned int ypos, unsigned int xpos)
1310 {
1311 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1312 struct fbcon_display *p = &fb_display[vc->vc_num];
1313 struct fbcon_ops *ops = info->fbcon_par;
1314
1315 if (!fbcon_is_inactive(vc, info))
1316 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1317 get_color(vc, info, scr_readw(s), 1),
1318 get_color(vc, info, scr_readw(s), 0));
1319 }
1320
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1321 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1322 {
1323 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1324 struct fbcon_ops *ops = info->fbcon_par;
1325
1326 if (!fbcon_is_inactive(vc, info))
1327 ops->clear_margins(vc, info, margin_color, bottom_only);
1328 }
1329
fbcon_cursor(struct vc_data * vc,bool enable)1330 static void fbcon_cursor(struct vc_data *vc, bool enable)
1331 {
1332 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1333 struct fbcon_ops *ops = info->fbcon_par;
1334 int c = scr_readw((u16 *) vc->vc_pos);
1335
1336 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1337
1338 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1339 return;
1340
1341 if (vc->vc_cursor_type & CUR_SW)
1342 fbcon_del_cursor_work(info);
1343 else
1344 fbcon_add_cursor_work(info);
1345
1346 ops->cursor_flash = enable;
1347
1348 if (!ops->cursor)
1349 return;
1350
1351 ops->cursor(vc, info, enable, get_color(vc, info, c, 1),
1352 get_color(vc, info, c, 0));
1353 }
1354
1355 static int scrollback_phys_max = 0;
1356 static int scrollback_max = 0;
1357 static int scrollback_current = 0;
1358
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1359 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1360 int unit)
1361 {
1362 struct fbcon_display *p, *t;
1363 struct vc_data **default_mode, *vc;
1364 struct vc_data *svc;
1365 struct fbcon_ops *ops = info->fbcon_par;
1366 int rows, cols;
1367 unsigned long ret = 0;
1368
1369 p = &fb_display[unit];
1370
1371 if (var_to_display(p, var, info))
1372 return;
1373
1374 vc = vc_cons[unit].d;
1375
1376 if (!vc)
1377 return;
1378
1379 default_mode = vc->vc_display_fg;
1380 svc = *default_mode;
1381 t = &fb_display[svc->vc_num];
1382
1383 if (!vc->vc_font.data) {
1384 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1385 vc->vc_font.width = (*default_mode)->vc_font.width;
1386 vc->vc_font.height = (*default_mode)->vc_font.height;
1387 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1388 p->userfont = t->userfont;
1389 if (p->userfont)
1390 REFCOUNT(p->fontdata)++;
1391 }
1392
1393 var->activate = FB_ACTIVATE_NOW;
1394 info->var.activate = var->activate;
1395 var->yoffset = info->var.yoffset;
1396 var->xoffset = info->var.xoffset;
1397 fb_set_var(info, var);
1398 ops->var = info->var;
1399 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1400 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1401 if (vc->vc_font.charcount == 256) {
1402 vc->vc_hi_font_mask = 0;
1403 } else {
1404 vc->vc_hi_font_mask = 0x100;
1405 if (vc->vc_can_do_color)
1406 vc->vc_complement_mask <<= 1;
1407 }
1408
1409 if (!*svc->uni_pagedict_loc)
1410 con_set_default_unimap(svc);
1411 if (!*vc->uni_pagedict_loc)
1412 con_copy_unimap(vc, svc);
1413
1414 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1415 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1416 cols /= vc->vc_font.width;
1417 rows /= vc->vc_font.height;
1418 ret = vc_resize(vc, cols, rows);
1419
1420 if (con_is_visible(vc) && !ret)
1421 update_screen(vc);
1422 }
1423
ywrap_up(struct vc_data * vc,int count)1424 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1425 {
1426 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1427 struct fbcon_ops *ops = info->fbcon_par;
1428 struct fbcon_display *p = &fb_display[vc->vc_num];
1429
1430 p->yscroll += count;
1431 if (p->yscroll >= p->vrows) /* Deal with wrap */
1432 p->yscroll -= p->vrows;
1433 ops->var.xoffset = 0;
1434 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1435 ops->var.vmode |= FB_VMODE_YWRAP;
1436 ops->update_start(info);
1437 scrollback_max += count;
1438 if (scrollback_max > scrollback_phys_max)
1439 scrollback_max = scrollback_phys_max;
1440 scrollback_current = 0;
1441 }
1442
ywrap_down(struct vc_data * vc,int count)1443 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1444 {
1445 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1446 struct fbcon_ops *ops = info->fbcon_par;
1447 struct fbcon_display *p = &fb_display[vc->vc_num];
1448
1449 p->yscroll -= count;
1450 if (p->yscroll < 0) /* Deal with wrap */
1451 p->yscroll += p->vrows;
1452 ops->var.xoffset = 0;
1453 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1454 ops->var.vmode |= FB_VMODE_YWRAP;
1455 ops->update_start(info);
1456 scrollback_max -= count;
1457 if (scrollback_max < 0)
1458 scrollback_max = 0;
1459 scrollback_current = 0;
1460 }
1461
ypan_up(struct vc_data * vc,int count)1462 static __inline__ void ypan_up(struct vc_data *vc, int count)
1463 {
1464 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1465 struct fbcon_display *p = &fb_display[vc->vc_num];
1466 struct fbcon_ops *ops = info->fbcon_par;
1467
1468 p->yscroll += count;
1469 if (p->yscroll > p->vrows - vc->vc_rows) {
1470 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1471 0, 0, 0, vc->vc_rows, vc->vc_cols);
1472 p->yscroll -= p->vrows - vc->vc_rows;
1473 }
1474
1475 ops->var.xoffset = 0;
1476 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1477 ops->var.vmode &= ~FB_VMODE_YWRAP;
1478 ops->update_start(info);
1479 fbcon_clear_margins(vc, 1);
1480 scrollback_max += count;
1481 if (scrollback_max > scrollback_phys_max)
1482 scrollback_max = scrollback_phys_max;
1483 scrollback_current = 0;
1484 }
1485
ypan_up_redraw(struct vc_data * vc,int t,int count)1486 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1487 {
1488 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1489 struct fbcon_ops *ops = info->fbcon_par;
1490 struct fbcon_display *p = &fb_display[vc->vc_num];
1491
1492 p->yscroll += count;
1493
1494 if (p->yscroll > p->vrows - vc->vc_rows) {
1495 p->yscroll -= p->vrows - vc->vc_rows;
1496 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1497 }
1498
1499 ops->var.xoffset = 0;
1500 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1501 ops->var.vmode &= ~FB_VMODE_YWRAP;
1502 ops->update_start(info);
1503 fbcon_clear_margins(vc, 1);
1504 scrollback_max += count;
1505 if (scrollback_max > scrollback_phys_max)
1506 scrollback_max = scrollback_phys_max;
1507 scrollback_current = 0;
1508 }
1509
ypan_down(struct vc_data * vc,int count)1510 static __inline__ void ypan_down(struct vc_data *vc, int count)
1511 {
1512 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1513 struct fbcon_display *p = &fb_display[vc->vc_num];
1514 struct fbcon_ops *ops = info->fbcon_par;
1515
1516 p->yscroll -= count;
1517 if (p->yscroll < 0) {
1518 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1519 0, vc->vc_rows, vc->vc_cols);
1520 p->yscroll += p->vrows - vc->vc_rows;
1521 }
1522
1523 ops->var.xoffset = 0;
1524 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1525 ops->var.vmode &= ~FB_VMODE_YWRAP;
1526 ops->update_start(info);
1527 fbcon_clear_margins(vc, 1);
1528 scrollback_max -= count;
1529 if (scrollback_max < 0)
1530 scrollback_max = 0;
1531 scrollback_current = 0;
1532 }
1533
ypan_down_redraw(struct vc_data * vc,int t,int count)1534 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1535 {
1536 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1537 struct fbcon_ops *ops = info->fbcon_par;
1538 struct fbcon_display *p = &fb_display[vc->vc_num];
1539
1540 p->yscroll -= count;
1541
1542 if (p->yscroll < 0) {
1543 p->yscroll += p->vrows - vc->vc_rows;
1544 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1545 }
1546
1547 ops->var.xoffset = 0;
1548 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1549 ops->var.vmode &= ~FB_VMODE_YWRAP;
1550 ops->update_start(info);
1551 fbcon_clear_margins(vc, 1);
1552 scrollback_max -= count;
1553 if (scrollback_max < 0)
1554 scrollback_max = 0;
1555 scrollback_current = 0;
1556 }
1557
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1558 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1559 int line, int count, int dy)
1560 {
1561 unsigned short *s = (unsigned short *)
1562 (vc->vc_origin + vc->vc_size_row * line);
1563
1564 while (count--) {
1565 unsigned short *start = s;
1566 unsigned short *le = advance_row(s, 1);
1567 unsigned short c;
1568 int x = 0;
1569 unsigned short attr = 1;
1570
1571 do {
1572 c = scr_readw(s);
1573 if (attr != (c & 0xff00)) {
1574 attr = c & 0xff00;
1575 if (s > start) {
1576 fbcon_putcs(vc, start, s - start,
1577 dy, x);
1578 x += s - start;
1579 start = s;
1580 }
1581 }
1582 console_conditional_schedule();
1583 s++;
1584 } while (s < le);
1585 if (s > start)
1586 fbcon_putcs(vc, start, s - start, dy, x);
1587 console_conditional_schedule();
1588 dy++;
1589 }
1590 }
1591
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1592 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1593 struct fbcon_display *p, int line, int count, int ycount)
1594 {
1595 int offset = ycount * vc->vc_cols;
1596 unsigned short *d = (unsigned short *)
1597 (vc->vc_origin + vc->vc_size_row * line);
1598 unsigned short *s = d + offset;
1599 struct fbcon_ops *ops = info->fbcon_par;
1600
1601 while (count--) {
1602 unsigned short *start = s;
1603 unsigned short *le = advance_row(s, 1);
1604 unsigned short c;
1605 int x = 0;
1606
1607 do {
1608 c = scr_readw(s);
1609
1610 if (c == scr_readw(d)) {
1611 if (s > start) {
1612 ops->bmove(vc, info, line + ycount, x,
1613 line, x, 1, s-start);
1614 x += s - start + 1;
1615 start = s + 1;
1616 } else {
1617 x++;
1618 start++;
1619 }
1620 }
1621
1622 scr_writew(c, d);
1623 console_conditional_schedule();
1624 s++;
1625 d++;
1626 } while (s < le);
1627 if (s > start)
1628 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1629 s-start);
1630 console_conditional_schedule();
1631 if (ycount > 0)
1632 line++;
1633 else {
1634 line--;
1635 /* NOTE: We subtract two lines from these pointers */
1636 s -= vc->vc_size_row;
1637 d -= vc->vc_size_row;
1638 }
1639 }
1640 }
1641
fbcon_redraw(struct vc_data * vc,int line,int count,int offset)1642 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset)
1643 {
1644 unsigned short *d = (unsigned short *)
1645 (vc->vc_origin + vc->vc_size_row * line);
1646 unsigned short *s = d + offset;
1647
1648 while (count--) {
1649 unsigned short *start = s;
1650 unsigned short *le = advance_row(s, 1);
1651 unsigned short c;
1652 int x = 0;
1653 unsigned short attr = 1;
1654
1655 do {
1656 c = scr_readw(s);
1657 if (attr != (c & 0xff00)) {
1658 attr = c & 0xff00;
1659 if (s > start) {
1660 fbcon_putcs(vc, start, s - start,
1661 line, x);
1662 x += s - start;
1663 start = s;
1664 }
1665 }
1666 if (c == scr_readw(d)) {
1667 if (s > start) {
1668 fbcon_putcs(vc, start, s - start,
1669 line, x);
1670 x += s - start + 1;
1671 start = s + 1;
1672 } else {
1673 x++;
1674 start++;
1675 }
1676 }
1677 scr_writew(c, d);
1678 console_conditional_schedule();
1679 s++;
1680 d++;
1681 } while (s < le);
1682 if (s > start)
1683 fbcon_putcs(vc, start, s - start, line, x);
1684 console_conditional_schedule();
1685 if (offset > 0)
1686 line++;
1687 else {
1688 line--;
1689 /* NOTE: We subtract two lines from these pointers */
1690 s -= vc->vc_size_row;
1691 d -= vc->vc_size_row;
1692 }
1693 }
1694 }
1695
fbcon_bmove_rec(struct vc_data * vc,struct fbcon_display * p,int sy,int sx,int dy,int dx,int height,int width,u_int y_break)1696 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1697 int dy, int dx, int height, int width, u_int y_break)
1698 {
1699 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1700 struct fbcon_ops *ops = info->fbcon_par;
1701 u_int b;
1702
1703 if (sy < y_break && sy + height > y_break) {
1704 b = y_break - sy;
1705 if (dy < sy) { /* Avoid trashing self */
1706 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1707 y_break);
1708 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1709 height - b, width, y_break);
1710 } else {
1711 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1712 height - b, width, y_break);
1713 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1714 y_break);
1715 }
1716 return;
1717 }
1718
1719 if (dy < y_break && dy + height > y_break) {
1720 b = y_break - dy;
1721 if (dy < sy) { /* Avoid trashing self */
1722 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1723 y_break);
1724 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1725 height - b, width, y_break);
1726 } else {
1727 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1728 height - b, width, y_break);
1729 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1730 y_break);
1731 }
1732 return;
1733 }
1734 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1735 height, width);
1736 }
1737
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1738 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1739 int height, int width)
1740 {
1741 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1742 struct fbcon_display *p = &fb_display[vc->vc_num];
1743
1744 if (fbcon_is_inactive(vc, info))
1745 return;
1746
1747 if (!width || !height)
1748 return;
1749
1750 /* Split blits that cross physical y_wrap case.
1751 * Pathological case involves 4 blits, better to use recursive
1752 * code rather than unrolled case
1753 *
1754 * Recursive invocations don't need to erase the cursor over and
1755 * over again, so we use fbcon_bmove_rec()
1756 */
1757 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1758 p->vrows - p->yscroll);
1759 }
1760
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1761 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1762 enum con_scroll dir, unsigned int count)
1763 {
1764 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1765 struct fbcon_display *p = &fb_display[vc->vc_num];
1766 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1767
1768 if (fbcon_is_inactive(vc, info))
1769 return true;
1770
1771 fbcon_cursor(vc, false);
1772
1773 /*
1774 * ++Geert: Only use ywrap/ypan if the console is in text mode
1775 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1776 * whole screen (prevents flicker).
1777 */
1778
1779 switch (dir) {
1780 case SM_UP:
1781 if (count > vc->vc_rows) /* Maximum realistic size */
1782 count = vc->vc_rows;
1783 switch (fb_scrollmode(p)) {
1784 case SCROLL_MOVE:
1785 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1786 count);
1787 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1788 scr_memsetw((unsigned short *) (vc->vc_origin +
1789 vc->vc_size_row *
1790 (b - count)),
1791 vc->vc_video_erase_char,
1792 vc->vc_size_row * count);
1793 return true;
1794
1795 case SCROLL_WRAP_MOVE:
1796 if (b - t - count > 3 * vc->vc_rows >> 2) {
1797 if (t > 0)
1798 fbcon_bmove(vc, 0, 0, count, 0, t,
1799 vc->vc_cols);
1800 ywrap_up(vc, count);
1801 if (vc->vc_rows - b > 0)
1802 fbcon_bmove(vc, b - count, 0, b, 0,
1803 vc->vc_rows - b,
1804 vc->vc_cols);
1805 } else if (info->flags & FBINFO_READS_FAST)
1806 fbcon_bmove(vc, t + count, 0, t, 0,
1807 b - t - count, vc->vc_cols);
1808 else
1809 goto redraw_up;
1810 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1811 break;
1812
1813 case SCROLL_PAN_REDRAW:
1814 if ((p->yscroll + count <=
1815 2 * (p->vrows - vc->vc_rows))
1816 && ((!scroll_partial && (b - t == vc->vc_rows))
1817 || (scroll_partial
1818 && (b - t - count >
1819 3 * vc->vc_rows >> 2)))) {
1820 if (t > 0)
1821 fbcon_redraw_move(vc, p, 0, t, count);
1822 ypan_up_redraw(vc, t, count);
1823 if (vc->vc_rows - b > 0)
1824 fbcon_redraw_move(vc, p, b,
1825 vc->vc_rows - b, b);
1826 } else
1827 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1828 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1829 break;
1830
1831 case SCROLL_PAN_MOVE:
1832 if ((p->yscroll + count <=
1833 2 * (p->vrows - vc->vc_rows))
1834 && ((!scroll_partial && (b - t == vc->vc_rows))
1835 || (scroll_partial
1836 && (b - t - count >
1837 3 * vc->vc_rows >> 2)))) {
1838 if (t > 0)
1839 fbcon_bmove(vc, 0, 0, count, 0, t,
1840 vc->vc_cols);
1841 ypan_up(vc, count);
1842 if (vc->vc_rows - b > 0)
1843 fbcon_bmove(vc, b - count, 0, b, 0,
1844 vc->vc_rows - b,
1845 vc->vc_cols);
1846 } else if (info->flags & FBINFO_READS_FAST)
1847 fbcon_bmove(vc, t + count, 0, t, 0,
1848 b - t - count, vc->vc_cols);
1849 else
1850 goto redraw_up;
1851 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1852 break;
1853
1854 case SCROLL_REDRAW:
1855 redraw_up:
1856 fbcon_redraw(vc, t, b - t - count,
1857 count * vc->vc_cols);
1858 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1859 scr_memsetw((unsigned short *) (vc->vc_origin +
1860 vc->vc_size_row *
1861 (b - count)),
1862 vc->vc_video_erase_char,
1863 vc->vc_size_row * count);
1864 return true;
1865 }
1866 break;
1867
1868 case SM_DOWN:
1869 if (count > vc->vc_rows) /* Maximum realistic size */
1870 count = vc->vc_rows;
1871 switch (fb_scrollmode(p)) {
1872 case SCROLL_MOVE:
1873 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1874 -count);
1875 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1876 scr_memsetw((unsigned short *) (vc->vc_origin +
1877 vc->vc_size_row *
1878 t),
1879 vc->vc_video_erase_char,
1880 vc->vc_size_row * count);
1881 return true;
1882
1883 case SCROLL_WRAP_MOVE:
1884 if (b - t - count > 3 * vc->vc_rows >> 2) {
1885 if (vc->vc_rows - b > 0)
1886 fbcon_bmove(vc, b, 0, b - count, 0,
1887 vc->vc_rows - b,
1888 vc->vc_cols);
1889 ywrap_down(vc, count);
1890 if (t > 0)
1891 fbcon_bmove(vc, count, 0, 0, 0, t,
1892 vc->vc_cols);
1893 } else if (info->flags & FBINFO_READS_FAST)
1894 fbcon_bmove(vc, t, 0, t + count, 0,
1895 b - t - count, vc->vc_cols);
1896 else
1897 goto redraw_down;
1898 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1899 break;
1900
1901 case SCROLL_PAN_MOVE:
1902 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1903 && ((!scroll_partial && (b - t == vc->vc_rows))
1904 || (scroll_partial
1905 && (b - t - count >
1906 3 * vc->vc_rows >> 2)))) {
1907 if (vc->vc_rows - b > 0)
1908 fbcon_bmove(vc, b, 0, b - count, 0,
1909 vc->vc_rows - b,
1910 vc->vc_cols);
1911 ypan_down(vc, count);
1912 if (t > 0)
1913 fbcon_bmove(vc, count, 0, 0, 0, t,
1914 vc->vc_cols);
1915 } else if (info->flags & FBINFO_READS_FAST)
1916 fbcon_bmove(vc, t, 0, t + count, 0,
1917 b - t - count, vc->vc_cols);
1918 else
1919 goto redraw_down;
1920 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1921 break;
1922
1923 case SCROLL_PAN_REDRAW:
1924 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1925 && ((!scroll_partial && (b - t == vc->vc_rows))
1926 || (scroll_partial
1927 && (b - t - count >
1928 3 * vc->vc_rows >> 2)))) {
1929 if (vc->vc_rows - b > 0)
1930 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1931 b - count);
1932 ypan_down_redraw(vc, t, count);
1933 if (t > 0)
1934 fbcon_redraw_move(vc, p, count, t, 0);
1935 } else
1936 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1937 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1938 break;
1939
1940 case SCROLL_REDRAW:
1941 redraw_down:
1942 fbcon_redraw(vc, b - 1, b - t - count,
1943 -count * vc->vc_cols);
1944 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945 scr_memsetw((unsigned short *) (vc->vc_origin +
1946 vc->vc_size_row *
1947 t),
1948 vc->vc_video_erase_char,
1949 vc->vc_size_row * count);
1950 return true;
1951 }
1952 }
1953 return false;
1954 }
1955
1956
updatescrollmode_accel(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1957 static void updatescrollmode_accel(struct fbcon_display *p,
1958 struct fb_info *info,
1959 struct vc_data *vc)
1960 {
1961 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1962 struct fbcon_ops *ops = info->fbcon_par;
1963 int cap = info->flags;
1964 u16 t = 0;
1965 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1966 info->fix.xpanstep);
1967 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1968 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1969 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1970 info->var.xres_virtual);
1971 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1972 divides(ypan, vc->vc_font.height) && vyres > yres;
1973 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1974 divides(ywrap, vc->vc_font.height) &&
1975 divides(vc->vc_font.height, vyres) &&
1976 divides(vc->vc_font.height, yres);
1977 int reading_fast = cap & FBINFO_READS_FAST;
1978 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1979 !(cap & FBINFO_HWACCEL_DISABLED);
1980 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1981 !(cap & FBINFO_HWACCEL_DISABLED);
1982
1983 if (good_wrap || good_pan) {
1984 if (reading_fast || fast_copyarea)
1985 p->scrollmode = good_wrap ?
1986 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1987 else
1988 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1989 SCROLL_PAN_REDRAW;
1990 } else {
1991 if (reading_fast || (fast_copyarea && !fast_imageblit))
1992 p->scrollmode = SCROLL_MOVE;
1993 else
1994 p->scrollmode = SCROLL_REDRAW;
1995 }
1996 #endif
1997 }
1998
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1999 static void updatescrollmode(struct fbcon_display *p,
2000 struct fb_info *info,
2001 struct vc_data *vc)
2002 {
2003 struct fbcon_ops *ops = info->fbcon_par;
2004 int fh = vc->vc_font.height;
2005 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2006 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2007 info->var.xres_virtual);
2008
2009 p->vrows = vyres/fh;
2010 if (yres > (fh * (vc->vc_rows + 1)))
2011 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2012 if ((yres % fh) && (vyres % fh < yres % fh))
2013 p->vrows--;
2014
2015 /* update scrollmode in case hardware acceleration is used */
2016 updatescrollmode_accel(p, info, vc);
2017 }
2018
2019 #define PITCH(w) (((w) + 7) >> 3)
2020 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2021
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,bool from_user)2022 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2023 unsigned int height, bool from_user)
2024 {
2025 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2026 struct fbcon_ops *ops = info->fbcon_par;
2027 struct fbcon_display *p = &fb_display[vc->vc_num];
2028 struct fb_var_screeninfo var = info->var;
2029 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2030
2031 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2032 int size;
2033 int pitch = PITCH(vc->vc_font.width);
2034
2035 /*
2036 * If user font, ensure that a possible change to user font
2037 * height or width will not allow a font data out-of-bounds access.
2038 * NOTE: must use original charcount in calculation as font
2039 * charcount can change and cannot be used to determine the
2040 * font data allocated size.
2041 */
2042 if (pitch <= 0)
2043 return -EINVAL;
2044 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
2045 if (size > FNTSIZE(vc->vc_font.data))
2046 return -EINVAL;
2047 }
2048
2049 virt_w = FBCON_SWAP(ops->rotate, width, height);
2050 virt_h = FBCON_SWAP(ops->rotate, height, width);
2051 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2052 vc->vc_font.height);
2053 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2054 vc->vc_font.width);
2055 var.xres = virt_w * virt_fw;
2056 var.yres = virt_h * virt_fh;
2057 x_diff = info->var.xres - var.xres;
2058 y_diff = info->var.yres - var.yres;
2059 if (x_diff < 0 || x_diff > virt_fw ||
2060 y_diff < 0 || y_diff > virt_fh) {
2061 const struct fb_videomode *mode;
2062
2063 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2064 mode = fb_find_best_mode(&var, &info->modelist);
2065 if (mode == NULL)
2066 return -EINVAL;
2067 display_to_var(&var, p);
2068 fb_videomode_to_var(&var, mode);
2069
2070 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2071 return -EINVAL;
2072
2073 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2074 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2075 var.activate = FB_ACTIVATE_NOW |
2076 FB_ACTIVATE_FORCE;
2077 fb_set_var(info, &var);
2078 }
2079 var_to_display(p, &info->var, info);
2080 ops->var = info->var;
2081 }
2082 updatescrollmode(p, info, vc);
2083 return 0;
2084 }
2085
fbcon_switch(struct vc_data * vc)2086 static bool fbcon_switch(struct vc_data *vc)
2087 {
2088 struct fb_info *info, *old_info = NULL;
2089 struct fbcon_ops *ops;
2090 struct fbcon_display *p = &fb_display[vc->vc_num];
2091 struct fb_var_screeninfo var;
2092 int i, ret, prev_console;
2093
2094 info = fbcon_info_from_console(vc->vc_num);
2095 ops = info->fbcon_par;
2096
2097 if (logo_shown >= 0) {
2098 struct vc_data *conp2 = vc_cons[logo_shown].d;
2099
2100 if (conp2->vc_top == logo_lines
2101 && conp2->vc_bottom == conp2->vc_rows)
2102 conp2->vc_top = 0;
2103 logo_shown = FBCON_LOGO_CANSHOW;
2104 }
2105
2106 prev_console = ops->currcon;
2107 if (prev_console != -1)
2108 old_info = fbcon_info_from_console(prev_console);
2109 /*
2110 * FIXME: If we have multiple fbdev's loaded, we need to
2111 * update all info->currcon. Perhaps, we can place this
2112 * in a centralized structure, but this might break some
2113 * drivers.
2114 *
2115 * info->currcon = vc->vc_num;
2116 */
2117 fbcon_for_each_registered_fb(i) {
2118 if (fbcon_registered_fb[i]->fbcon_par) {
2119 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par;
2120
2121 o->currcon = vc->vc_num;
2122 }
2123 }
2124 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2125 display_to_var(&var, p);
2126 var.activate = FB_ACTIVATE_NOW;
2127
2128 /*
2129 * make sure we don't unnecessarily trip the memcmp()
2130 * in fb_set_var()
2131 */
2132 info->var.activate = var.activate;
2133 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2134 fb_set_var(info, &var);
2135 ops->var = info->var;
2136
2137 if (old_info != NULL && (old_info != info ||
2138 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2139 if (info->fbops->fb_set_par) {
2140 ret = info->fbops->fb_set_par(info);
2141
2142 if (ret)
2143 printk(KERN_ERR "fbcon_switch: detected "
2144 "unhandled fb_set_par error, "
2145 "error code %d\n", ret);
2146 }
2147
2148 if (old_info != info)
2149 fbcon_del_cursor_work(old_info);
2150 }
2151
2152 if (fbcon_is_inactive(vc, info) ||
2153 ops->blank_state != FB_BLANK_UNBLANK)
2154 fbcon_del_cursor_work(info);
2155 else
2156 fbcon_add_cursor_work(info);
2157
2158 set_blitting_type(vc, info);
2159 ops->cursor_reset = 1;
2160
2161 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2162 ops->rotate = FB_ROTATE_UR;
2163 set_blitting_type(vc, info);
2164 }
2165
2166 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2167 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2168
2169 if (vc->vc_font.charcount > 256)
2170 vc->vc_complement_mask <<= 1;
2171
2172 updatescrollmode(p, info, vc);
2173
2174 switch (fb_scrollmode(p)) {
2175 case SCROLL_WRAP_MOVE:
2176 scrollback_phys_max = p->vrows - vc->vc_rows;
2177 break;
2178 case SCROLL_PAN_MOVE:
2179 case SCROLL_PAN_REDRAW:
2180 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2181 if (scrollback_phys_max < 0)
2182 scrollback_phys_max = 0;
2183 break;
2184 default:
2185 scrollback_phys_max = 0;
2186 break;
2187 }
2188
2189 scrollback_max = 0;
2190 scrollback_current = 0;
2191
2192 if (!fbcon_is_inactive(vc, info)) {
2193 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2194 ops->update_start(info);
2195 }
2196
2197 fbcon_set_palette(vc, color_table);
2198 fbcon_clear_margins(vc, 0);
2199
2200 if (logo_shown == FBCON_LOGO_DRAW) {
2201
2202 logo_shown = fg_console;
2203 fb_show_logo(info, ops->rotate);
2204 update_region(vc,
2205 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2206 vc->vc_size_row * (vc->vc_bottom -
2207 vc->vc_top) / 2);
2208 return false;
2209 }
2210 return true;
2211 }
2212
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2213 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2214 int blank)
2215 {
2216 if (blank) {
2217 unsigned short charmask = vc->vc_hi_font_mask ?
2218 0x1ff : 0xff;
2219 unsigned short oldc;
2220
2221 oldc = vc->vc_video_erase_char;
2222 vc->vc_video_erase_char &= charmask;
2223 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2224 vc->vc_video_erase_char = oldc;
2225 }
2226 }
2227
fbcon_blank(struct vc_data * vc,enum vesa_blank_mode blank,bool mode_switch)2228 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank,
2229 bool mode_switch)
2230 {
2231 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2232 struct fbcon_ops *ops = info->fbcon_par;
2233
2234 if (mode_switch) {
2235 struct fb_var_screeninfo var = info->var;
2236
2237 ops->graphics = 1;
2238
2239 if (!blank) {
2240 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2241 FB_ACTIVATE_KD_TEXT;
2242 fb_set_var(info, &var);
2243 ops->graphics = 0;
2244 ops->var = info->var;
2245 }
2246 }
2247
2248 if (!fbcon_is_inactive(vc, info)) {
2249 if (ops->blank_state != blank) {
2250 ops->blank_state = blank;
2251 fbcon_cursor(vc, !blank);
2252 ops->cursor_flash = (!blank);
2253
2254 if (fb_blank(info, blank))
2255 fbcon_generic_blank(vc, info, blank);
2256 }
2257
2258 if (!blank)
2259 update_screen(vc);
2260 }
2261
2262 if (mode_switch || fbcon_is_inactive(vc, info) ||
2263 ops->blank_state != FB_BLANK_UNBLANK)
2264 fbcon_del_cursor_work(info);
2265 else
2266 fbcon_add_cursor_work(info);
2267
2268 return false;
2269 }
2270
fbcon_debug_enter(struct vc_data * vc)2271 static void fbcon_debug_enter(struct vc_data *vc)
2272 {
2273 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2274 struct fbcon_ops *ops = info->fbcon_par;
2275
2276 ops->save_graphics = ops->graphics;
2277 ops->graphics = 0;
2278 if (info->fbops->fb_debug_enter)
2279 info->fbops->fb_debug_enter(info);
2280 fbcon_set_palette(vc, color_table);
2281 }
2282
fbcon_debug_leave(struct vc_data * vc)2283 static void fbcon_debug_leave(struct vc_data *vc)
2284 {
2285 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2286 struct fbcon_ops *ops = info->fbcon_par;
2287
2288 ops->graphics = ops->save_graphics;
2289 if (info->fbops->fb_debug_leave)
2290 info->fbops->fb_debug_leave(info);
2291 }
2292
fbcon_get_font(struct vc_data * vc,struct console_font * font,unsigned int vpitch)2293 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch)
2294 {
2295 u8 *fontdata = vc->vc_font.data;
2296 u8 *data = font->data;
2297 int i, j;
2298
2299 font->width = vc->vc_font.width;
2300 font->height = vc->vc_font.height;
2301 if (font->height > vpitch)
2302 return -ENOSPC;
2303 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2304 if (!font->data)
2305 return 0;
2306
2307 if (font->width <= 8) {
2308 j = vc->vc_font.height;
2309 if (font->charcount * j > FNTSIZE(fontdata))
2310 return -EINVAL;
2311
2312 for (i = 0; i < font->charcount; i++) {
2313 memcpy(data, fontdata, j);
2314 memset(data + j, 0, vpitch - j);
2315 data += vpitch;
2316 fontdata += j;
2317 }
2318 } else if (font->width <= 16) {
2319 j = vc->vc_font.height * 2;
2320 if (font->charcount * j > FNTSIZE(fontdata))
2321 return -EINVAL;
2322
2323 for (i = 0; i < font->charcount; i++) {
2324 memcpy(data, fontdata, j);
2325 memset(data + j, 0, 2*vpitch - j);
2326 data += 2*vpitch;
2327 fontdata += j;
2328 }
2329 } else if (font->width <= 24) {
2330 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2331 return -EINVAL;
2332
2333 for (i = 0; i < font->charcount; i++) {
2334 for (j = 0; j < vc->vc_font.height; j++) {
2335 *data++ = fontdata[0];
2336 *data++ = fontdata[1];
2337 *data++ = fontdata[2];
2338 fontdata += sizeof(u32);
2339 }
2340 memset(data, 0, 3 * (vpitch - j));
2341 data += 3 * (vpitch - j);
2342 }
2343 } else {
2344 j = vc->vc_font.height * 4;
2345 if (font->charcount * j > FNTSIZE(fontdata))
2346 return -EINVAL;
2347
2348 for (i = 0; i < font->charcount; i++) {
2349 memcpy(data, fontdata, j);
2350 memset(data + j, 0, 4 * vpitch - j);
2351 data += 4 * vpitch;
2352 fontdata += j;
2353 }
2354 }
2355 return 0;
2356 }
2357
2358 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2359 static void set_vc_hi_font(struct vc_data *vc, bool set)
2360 {
2361 if (!set) {
2362 vc->vc_hi_font_mask = 0;
2363 if (vc->vc_can_do_color) {
2364 vc->vc_complement_mask >>= 1;
2365 vc->vc_s_complement_mask >>= 1;
2366 }
2367
2368 /* ++Edmund: reorder the attribute bits */
2369 if (vc->vc_can_do_color) {
2370 unsigned short *cp =
2371 (unsigned short *) vc->vc_origin;
2372 int count = vc->vc_screenbuf_size / 2;
2373 unsigned short c;
2374 for (; count > 0; count--, cp++) {
2375 c = scr_readw(cp);
2376 scr_writew(((c & 0xfe00) >> 1) |
2377 (c & 0xff), cp);
2378 }
2379 c = vc->vc_video_erase_char;
2380 vc->vc_video_erase_char =
2381 ((c & 0xfe00) >> 1) | (c & 0xff);
2382 vc->vc_attr >>= 1;
2383 }
2384 } else {
2385 vc->vc_hi_font_mask = 0x100;
2386 if (vc->vc_can_do_color) {
2387 vc->vc_complement_mask <<= 1;
2388 vc->vc_s_complement_mask <<= 1;
2389 }
2390
2391 /* ++Edmund: reorder the attribute bits */
2392 {
2393 unsigned short *cp =
2394 (unsigned short *) vc->vc_origin;
2395 int count = vc->vc_screenbuf_size / 2;
2396 unsigned short c;
2397 for (; count > 0; count--, cp++) {
2398 unsigned short newc;
2399 c = scr_readw(cp);
2400 if (vc->vc_can_do_color)
2401 newc =
2402 ((c & 0xff00) << 1) | (c &
2403 0xff);
2404 else
2405 newc = c & ~0x100;
2406 scr_writew(newc, cp);
2407 }
2408 c = vc->vc_video_erase_char;
2409 if (vc->vc_can_do_color) {
2410 vc->vc_video_erase_char =
2411 ((c & 0xff00) << 1) | (c & 0xff);
2412 vc->vc_attr <<= 1;
2413 } else
2414 vc->vc_video_erase_char = c & ~0x100;
2415 }
2416 }
2417 }
2418
fbcon_do_set_font(struct vc_data * vc,int w,int h,int charcount,const u8 * data,int userfont)2419 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2420 const u8 * data, int userfont)
2421 {
2422 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2423 struct fbcon_ops *ops = info->fbcon_par;
2424 struct fbcon_display *p = &fb_display[vc->vc_num];
2425 int resize, ret, old_userfont, old_width, old_height, old_charcount;
2426 u8 *old_data = vc->vc_font.data;
2427
2428 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2429 vc->vc_font.data = (void *)(p->fontdata = data);
2430 old_userfont = p->userfont;
2431 if ((p->userfont = userfont))
2432 REFCOUNT(data)++;
2433
2434 old_width = vc->vc_font.width;
2435 old_height = vc->vc_font.height;
2436 old_charcount = vc->vc_font.charcount;
2437
2438 vc->vc_font.width = w;
2439 vc->vc_font.height = h;
2440 vc->vc_font.charcount = charcount;
2441 if (vc->vc_hi_font_mask && charcount == 256)
2442 set_vc_hi_font(vc, false);
2443 else if (!vc->vc_hi_font_mask && charcount == 512)
2444 set_vc_hi_font(vc, true);
2445
2446 if (resize) {
2447 int cols, rows;
2448
2449 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2450 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2451 cols /= w;
2452 rows /= h;
2453 ret = vc_resize(vc, cols, rows);
2454 if (ret)
2455 goto err_out;
2456 } else if (con_is_visible(vc)
2457 && vc->vc_mode == KD_TEXT) {
2458 fbcon_clear_margins(vc, 0);
2459 update_screen(vc);
2460 }
2461
2462 if (old_userfont && (--REFCOUNT(old_data) == 0))
2463 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2464 return 0;
2465
2466 err_out:
2467 p->fontdata = old_data;
2468 vc->vc_font.data = old_data;
2469
2470 if (userfont) {
2471 p->userfont = old_userfont;
2472 if (--REFCOUNT(data) == 0)
2473 kfree(data - FONT_EXTRA_WORDS * sizeof(int));
2474 }
2475
2476 vc->vc_font.width = old_width;
2477 vc->vc_font.height = old_height;
2478 vc->vc_font.charcount = old_charcount;
2479
2480 return ret;
2481 }
2482
2483 /*
2484 * User asked to set font; we are guaranteed that charcount does not exceed 512
2485 * but lets not assume that, since charcount of 512 is small for unicode support.
2486 */
2487
fbcon_set_font(struct vc_data * vc,const struct console_font * font,unsigned int vpitch,unsigned int flags)2488 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font,
2489 unsigned int vpitch, unsigned int flags)
2490 {
2491 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2492 unsigned charcount = font->charcount;
2493 int w = font->width;
2494 int h = font->height;
2495 int size, alloc_size;
2496 int i, csum;
2497 u8 *new_data, *data = font->data;
2498 int pitch = PITCH(font->width);
2499
2500 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2501 * If not this check should be changed to charcount < 256 */
2502 if (charcount != 256 && charcount != 512)
2503 return -EINVAL;
2504
2505 /* font bigger than screen resolution ? */
2506 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
2507 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
2508 return -EINVAL;
2509
2510 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT)
2511 return -EINVAL;
2512
2513 /* Make sure drawing engine can handle the font */
2514 if (!test_bit(font->width - 1, info->pixmap.blit_x) ||
2515 !test_bit(font->height - 1, info->pixmap.blit_y))
2516 return -EINVAL;
2517
2518 /* Make sure driver can handle the font length */
2519 if (fbcon_invalid_charcount(info, charcount))
2520 return -EINVAL;
2521
2522 /* Check for integer overflow in font size calculation */
2523 if (check_mul_overflow(h, pitch, &size) ||
2524 check_mul_overflow(size, charcount, &size))
2525 return -EINVAL;
2526
2527 /* Check for overflow in allocation size calculation */
2528 if (check_add_overflow(FONT_EXTRA_WORDS * sizeof(int), size, &alloc_size))
2529 return -EINVAL;
2530
2531 new_data = kmalloc(alloc_size, GFP_USER);
2532
2533 if (!new_data)
2534 return -ENOMEM;
2535
2536 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2537
2538 new_data += FONT_EXTRA_WORDS * sizeof(int);
2539 FNTSIZE(new_data) = size;
2540 REFCOUNT(new_data) = 0; /* usage counter */
2541 for (i=0; i< charcount; i++) {
2542 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch);
2543 }
2544
2545 /* Since linux has a nice crc32 function use it for counting font
2546 * checksums. */
2547 csum = crc32(0, new_data, size);
2548
2549 FNTSUM(new_data) = csum;
2550 /* Check if the same font is on some other console already */
2551 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2552 struct vc_data *tmp = vc_cons[i].d;
2553
2554 if (fb_display[i].userfont &&
2555 fb_display[i].fontdata &&
2556 FNTSUM(fb_display[i].fontdata) == csum &&
2557 FNTSIZE(fb_display[i].fontdata) == size &&
2558 tmp->vc_font.width == w &&
2559 !memcmp(fb_display[i].fontdata, new_data, size)) {
2560 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2561 new_data = (u8 *)fb_display[i].fontdata;
2562 break;
2563 }
2564 }
2565 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2566 }
2567
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,const char * name)2568 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font,
2569 const char *name)
2570 {
2571 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2572 const struct font_desc *f;
2573
2574 if (!name)
2575 f = get_default_font(info->var.xres, info->var.yres,
2576 info->pixmap.blit_x, info->pixmap.blit_y);
2577 else if (!(f = find_font(name)))
2578 return -ENOENT;
2579
2580 font->width = f->width;
2581 font->height = f->height;
2582 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2583 }
2584
2585 static u16 palette_red[16];
2586 static u16 palette_green[16];
2587 static u16 palette_blue[16];
2588
2589 static struct fb_cmap palette_cmap = {
2590 0, 16, palette_red, palette_green, palette_blue, NULL
2591 };
2592
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2593 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2594 {
2595 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2596 int i, j, k, depth;
2597 u8 val;
2598
2599 if (fbcon_is_inactive(vc, info))
2600 return;
2601
2602 if (!con_is_visible(vc))
2603 return;
2604
2605 depth = fb_get_color_depth(&info->var, &info->fix);
2606 if (depth > 3) {
2607 for (i = j = 0; i < 16; i++) {
2608 k = table[i];
2609 val = vc->vc_palette[j++];
2610 palette_red[k] = (val << 8) | val;
2611 val = vc->vc_palette[j++];
2612 palette_green[k] = (val << 8) | val;
2613 val = vc->vc_palette[j++];
2614 palette_blue[k] = (val << 8) | val;
2615 }
2616 palette_cmap.len = 16;
2617 palette_cmap.start = 0;
2618 /*
2619 * If framebuffer is capable of less than 16 colors,
2620 * use default palette of fbcon.
2621 */
2622 } else
2623 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2624
2625 fb_set_cmap(&palette_cmap, info);
2626 }
2627
2628 /* As we might be inside of softback, we may work with non-contiguous buffer,
2629 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2630 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2631 {
2632 while (cnt--) {
2633 u16 a = scr_readw(p);
2634 if (!vc->vc_can_do_color)
2635 a ^= 0x0800;
2636 else if (vc->vc_hi_font_mask == 0x100)
2637 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2638 (((a) & 0x0e00) << 4);
2639 else
2640 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2641 (((a) & 0x0700) << 4);
2642 scr_writew(a, p++);
2643 }
2644 }
2645
fbcon_suspended(struct fb_info * info)2646 void fbcon_suspended(struct fb_info *info)
2647 {
2648 struct vc_data *vc = NULL;
2649 struct fbcon_ops *ops = info->fbcon_par;
2650
2651 if (!ops || ops->currcon < 0)
2652 return;
2653 vc = vc_cons[ops->currcon].d;
2654
2655 /* Clear cursor, restore saved data */
2656 fbcon_cursor(vc, false);
2657 }
2658
fbcon_resumed(struct fb_info * info)2659 void fbcon_resumed(struct fb_info *info)
2660 {
2661 struct vc_data *vc;
2662 struct fbcon_ops *ops = info->fbcon_par;
2663
2664 if (!ops || ops->currcon < 0)
2665 return;
2666 vc = vc_cons[ops->currcon].d;
2667
2668 update_screen(vc);
2669 }
2670
fbcon_modechanged(struct fb_info * info)2671 static void fbcon_modechanged(struct fb_info *info)
2672 {
2673 struct fbcon_ops *ops = info->fbcon_par;
2674 struct vc_data *vc;
2675 struct fbcon_display *p;
2676 int rows, cols;
2677
2678 if (!ops || ops->currcon < 0)
2679 return;
2680 vc = vc_cons[ops->currcon].d;
2681 if (vc->vc_mode != KD_TEXT ||
2682 fbcon_info_from_console(ops->currcon) != info)
2683 return;
2684
2685 p = &fb_display[vc->vc_num];
2686 set_blitting_type(vc, info);
2687
2688 if (con_is_visible(vc)) {
2689 var_to_display(p, &info->var, info);
2690 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2691 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2692 cols /= vc->vc_font.width;
2693 rows /= vc->vc_font.height;
2694 vc_resize(vc, cols, rows);
2695 updatescrollmode(p, info, vc);
2696 scrollback_max = 0;
2697 scrollback_current = 0;
2698
2699 if (!fbcon_is_inactive(vc, info)) {
2700 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2701 ops->update_start(info);
2702 }
2703
2704 fbcon_set_palette(vc, color_table);
2705 update_screen(vc);
2706 }
2707 }
2708
fbcon_set_all_vcs(struct fb_info * info)2709 static void fbcon_set_all_vcs(struct fb_info *info)
2710 {
2711 struct fbcon_ops *ops = info->fbcon_par;
2712 struct vc_data *vc;
2713 struct fbcon_display *p;
2714 int i, rows, cols, fg = -1;
2715
2716 if (!ops || ops->currcon < 0)
2717 return;
2718
2719 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2720 vc = vc_cons[i].d;
2721 if (!vc || vc->vc_mode != KD_TEXT ||
2722 fbcon_info_from_console(i) != info)
2723 continue;
2724
2725 if (con_is_visible(vc)) {
2726 fg = i;
2727 continue;
2728 }
2729
2730 p = &fb_display[vc->vc_num];
2731 set_blitting_type(vc, info);
2732 var_to_display(p, &info->var, info);
2733 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2734 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2735 cols /= vc->vc_font.width;
2736 rows /= vc->vc_font.height;
2737 vc_resize(vc, cols, rows);
2738 }
2739
2740 if (fg != -1)
2741 fbcon_modechanged(info);
2742 }
2743
2744
fbcon_update_vcs(struct fb_info * info,bool all)2745 void fbcon_update_vcs(struct fb_info *info, bool all)
2746 {
2747 if (all)
2748 fbcon_set_all_vcs(info);
2749 else
2750 fbcon_modechanged(info);
2751 }
2752 EXPORT_SYMBOL(fbcon_update_vcs);
2753
2754 /* let fbcon check if it supports a new screen resolution */
fbcon_modechange_possible(struct fb_info * info,struct fb_var_screeninfo * var)2755 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
2756 {
2757 struct fbcon_ops *ops = info->fbcon_par;
2758 struct vc_data *vc;
2759 unsigned int i;
2760
2761 WARN_CONSOLE_UNLOCKED();
2762
2763 if (!ops)
2764 return 0;
2765
2766 /* prevent setting a screen size which is smaller than font size */
2767 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2768 vc = vc_cons[i].d;
2769 if (!vc || vc->vc_mode != KD_TEXT ||
2770 fbcon_info_from_console(i) != info)
2771 continue;
2772
2773 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
2774 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
2775 return -EINVAL;
2776 }
2777
2778 return 0;
2779 }
2780 EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
2781
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2782 int fbcon_mode_deleted(struct fb_info *info,
2783 struct fb_videomode *mode)
2784 {
2785 struct fb_info *fb_info;
2786 struct fbcon_display *p;
2787 int i, j, found = 0;
2788
2789 /* before deletion, ensure that mode is not in use */
2790 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2791 j = con2fb_map[i];
2792 if (j == -1)
2793 continue;
2794 fb_info = fbcon_registered_fb[j];
2795 if (fb_info != info)
2796 continue;
2797 p = &fb_display[i];
2798 if (!p || !p->mode)
2799 continue;
2800 if (fb_mode_is_equal(p->mode, mode)) {
2801 found = 1;
2802 break;
2803 }
2804 }
2805 return found;
2806 }
2807
2808 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2809 static void fbcon_unbind(void)
2810 {
2811 int ret;
2812
2813 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2814 fbcon_is_default);
2815
2816 if (!ret)
2817 fbcon_has_console_bind = 0;
2818 }
2819 #else
fbcon_unbind(void)2820 static inline void fbcon_unbind(void) {}
2821 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2822
fbcon_fb_unbind(struct fb_info * info)2823 void fbcon_fb_unbind(struct fb_info *info)
2824 {
2825 int i, new_idx = -1;
2826 int idx = info->node;
2827
2828 console_lock();
2829
2830 if (!fbcon_has_console_bind) {
2831 console_unlock();
2832 return;
2833 }
2834
2835 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2836 if (con2fb_map[i] != idx &&
2837 con2fb_map[i] != -1) {
2838 new_idx = con2fb_map[i];
2839 break;
2840 }
2841 }
2842
2843 if (new_idx != -1) {
2844 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2845 if (con2fb_map[i] == idx)
2846 set_con2fb_map(i, new_idx, 0);
2847 }
2848 } else {
2849 struct fb_info *info = fbcon_registered_fb[idx];
2850
2851 /* This is sort of like set_con2fb_map, except it maps
2852 * the consoles to no device and then releases the
2853 * oldinfo to free memory and cancel the cursor blink
2854 * timer. I can imagine this just becoming part of
2855 * set_con2fb_map where new_idx is -1
2856 */
2857 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2858 if (con2fb_map[i] == idx) {
2859 con2fb_map[i] = -1;
2860 if (!search_fb_in_map(idx)) {
2861 con2fb_release_oldinfo(vc_cons[i].d,
2862 info, NULL);
2863 }
2864 }
2865 }
2866 fbcon_unbind();
2867 }
2868
2869 console_unlock();
2870 }
2871
fbcon_fb_unregistered(struct fb_info * info)2872 void fbcon_fb_unregistered(struct fb_info *info)
2873 {
2874 int i, idx;
2875
2876 console_lock();
2877
2878 fbcon_registered_fb[info->node] = NULL;
2879 fbcon_num_registered_fb--;
2880
2881 if (deferred_takeover) {
2882 console_unlock();
2883 return;
2884 }
2885
2886 idx = info->node;
2887 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2888 if (con2fb_map[i] == idx)
2889 con2fb_map[i] = -1;
2890 }
2891
2892 if (idx == info_idx) {
2893 info_idx = -1;
2894
2895 fbcon_for_each_registered_fb(i) {
2896 info_idx = i;
2897 break;
2898 }
2899 }
2900
2901 if (info_idx != -1) {
2902 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2903 if (con2fb_map[i] == -1)
2904 con2fb_map[i] = info_idx;
2905 }
2906 }
2907
2908 if (primary_device == idx)
2909 primary_device = -1;
2910
2911 if (!fbcon_num_registered_fb)
2912 do_unregister_con_driver(&fb_con);
2913 console_unlock();
2914 }
2915
fbcon_remap_all(struct fb_info * info)2916 void fbcon_remap_all(struct fb_info *info)
2917 {
2918 int i, idx = info->node;
2919
2920 console_lock();
2921 if (deferred_takeover) {
2922 for (i = first_fb_vc; i <= last_fb_vc; i++)
2923 con2fb_map_boot[i] = idx;
2924 fbcon_map_override();
2925 console_unlock();
2926 return;
2927 }
2928
2929 for (i = first_fb_vc; i <= last_fb_vc; i++)
2930 set_con2fb_map(i, idx, 0);
2931
2932 if (con_is_bound(&fb_con)) {
2933 printk(KERN_INFO "fbcon: Remapping primary device, "
2934 "fb%i, to tty %i-%i\n", idx,
2935 first_fb_vc + 1, last_fb_vc + 1);
2936 info_idx = idx;
2937 }
2938 console_unlock();
2939 }
2940
2941 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2942 static void fbcon_select_primary(struct fb_info *info)
2943 {
2944 if (!map_override && primary_device == -1 &&
2945 video_is_primary_device(info->device)) {
2946 int i;
2947
2948 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2949 info->fix.id, info->node);
2950 primary_device = info->node;
2951
2952 for (i = first_fb_vc; i <= last_fb_vc; i++)
2953 con2fb_map_boot[i] = primary_device;
2954
2955 if (con_is_bound(&fb_con)) {
2956 printk(KERN_INFO "fbcon: Remapping primary device, "
2957 "fb%i, to tty %i-%i\n", info->node,
2958 first_fb_vc + 1, last_fb_vc + 1);
2959 info_idx = primary_device;
2960 }
2961 }
2962
2963 }
2964 #else
fbcon_select_primary(struct fb_info * info)2965 static inline void fbcon_select_primary(struct fb_info *info)
2966 {
2967 return;
2968 }
2969 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2970
2971 static bool lockless_register_fb;
2972 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
2973 MODULE_PARM_DESC(lockless_register_fb,
2974 "Lockless framebuffer registration for debugging [default=off]");
2975
2976 /* called with console_lock held */
do_fb_registered(struct fb_info * info)2977 static int do_fb_registered(struct fb_info *info)
2978 {
2979 int ret = 0, i, idx;
2980
2981 WARN_CONSOLE_UNLOCKED();
2982
2983 fbcon_registered_fb[info->node] = info;
2984 fbcon_num_registered_fb++;
2985
2986 idx = info->node;
2987 fbcon_select_primary(info);
2988
2989 if (deferred_takeover) {
2990 pr_info("fbcon: Deferring console take-over\n");
2991 return 0;
2992 }
2993
2994 if (info_idx == -1) {
2995 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2996 if (con2fb_map_boot[i] == idx) {
2997 info_idx = idx;
2998 break;
2999 }
3000 }
3001
3002 if (info_idx != -1)
3003 ret = do_fbcon_takeover(1);
3004 } else {
3005 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3006 if (con2fb_map_boot[i] == idx)
3007 set_con2fb_map(i, idx, 0);
3008 }
3009 }
3010
3011 return ret;
3012 }
3013
fbcon_fb_registered(struct fb_info * info)3014 int fbcon_fb_registered(struct fb_info *info)
3015 {
3016 int ret;
3017
3018 if (!lockless_register_fb)
3019 console_lock();
3020 else
3021 atomic_inc(&ignore_console_lock_warning);
3022
3023 ret = do_fb_registered(info);
3024
3025 if (!lockless_register_fb)
3026 console_unlock();
3027 else
3028 atomic_dec(&ignore_console_lock_warning);
3029
3030 return ret;
3031 }
3032
fbcon_fb_blanked(struct fb_info * info,int blank)3033 void fbcon_fb_blanked(struct fb_info *info, int blank)
3034 {
3035 struct fbcon_ops *ops = info->fbcon_par;
3036 struct vc_data *vc;
3037
3038 if (!ops || ops->currcon < 0)
3039 return;
3040
3041 vc = vc_cons[ops->currcon].d;
3042 if (vc->vc_mode != KD_TEXT ||
3043 fbcon_info_from_console(ops->currcon) != info)
3044 return;
3045
3046 if (con_is_visible(vc)) {
3047 if (blank)
3048 do_blank_screen(0);
3049 else
3050 do_unblank_screen(0);
3051 }
3052 ops->blank_state = blank;
3053 }
3054
fbcon_new_modelist(struct fb_info * info)3055 void fbcon_new_modelist(struct fb_info *info)
3056 {
3057 int i;
3058 struct vc_data *vc;
3059 struct fb_var_screeninfo var;
3060 const struct fb_videomode *mode;
3061
3062 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3063 if (fbcon_info_from_console(i) != info)
3064 continue;
3065 if (!fb_display[i].mode)
3066 continue;
3067 vc = vc_cons[i].d;
3068 display_to_var(&var, &fb_display[i]);
3069 mode = fb_find_nearest_mode(fb_display[i].mode,
3070 &info->modelist);
3071 fb_videomode_to_var(&var, mode);
3072 fbcon_set_disp(info, &var, vc->vc_num);
3073 }
3074 }
3075
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)3076 void fbcon_get_requirement(struct fb_info *info,
3077 struct fb_blit_caps *caps)
3078 {
3079 struct vc_data *vc;
3080
3081 if (caps->flags) {
3082 int i, charcnt;
3083
3084 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3085 vc = vc_cons[i].d;
3086 if (vc && vc->vc_mode == KD_TEXT &&
3087 info->node == con2fb_map[i]) {
3088 set_bit(vc->vc_font.width - 1, caps->x);
3089 set_bit(vc->vc_font.height - 1, caps->y);
3090 charcnt = vc->vc_font.charcount;
3091 if (caps->len < charcnt)
3092 caps->len = charcnt;
3093 }
3094 }
3095 } else {
3096 vc = vc_cons[fg_console].d;
3097
3098 if (vc && vc->vc_mode == KD_TEXT &&
3099 info->node == con2fb_map[fg_console]) {
3100 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH);
3101 set_bit(vc->vc_font.width - 1, caps->x);
3102 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT);
3103 set_bit(vc->vc_font.height - 1, caps->y);
3104 caps->len = vc->vc_font.charcount;
3105 }
3106 }
3107 }
3108
fbcon_set_con2fb_map_ioctl(void __user * argp)3109 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3110 {
3111 struct fb_con2fbmap con2fb;
3112 int ret;
3113
3114 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3115 return -EFAULT;
3116 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3117 return -EINVAL;
3118 if (con2fb.framebuffer >= FB_MAX)
3119 return -EINVAL;
3120 if (!fbcon_registered_fb[con2fb.framebuffer])
3121 request_module("fb%d", con2fb.framebuffer);
3122 if (!fbcon_registered_fb[con2fb.framebuffer]) {
3123 return -EINVAL;
3124 }
3125
3126 console_lock();
3127 ret = set_con2fb_map(con2fb.console - 1,
3128 con2fb.framebuffer, 1);
3129 console_unlock();
3130
3131 return ret;
3132 }
3133
fbcon_get_con2fb_map_ioctl(void __user * argp)3134 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3135 {
3136 struct fb_con2fbmap con2fb;
3137
3138 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3139 return -EFAULT;
3140 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3141 return -EINVAL;
3142
3143 console_lock();
3144 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3145 console_unlock();
3146
3147 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3148 }
3149
3150 /*
3151 * The console `switch' structure for the frame buffer based console
3152 */
3153
3154 static const struct consw fb_con = {
3155 .owner = THIS_MODULE,
3156 .con_startup = fbcon_startup,
3157 .con_init = fbcon_init,
3158 .con_deinit = fbcon_deinit,
3159 .con_clear = fbcon_clear,
3160 .con_putcs = fbcon_putcs,
3161 .con_cursor = fbcon_cursor,
3162 .con_scroll = fbcon_scroll,
3163 .con_switch = fbcon_switch,
3164 .con_blank = fbcon_blank,
3165 .con_font_set = fbcon_set_font,
3166 .con_font_get = fbcon_get_font,
3167 .con_font_default = fbcon_set_def_font,
3168 .con_set_palette = fbcon_set_palette,
3169 .con_invert_region = fbcon_invert_region,
3170 .con_resize = fbcon_resize,
3171 .con_debug_enter = fbcon_debug_enter,
3172 .con_debug_leave = fbcon_debug_leave,
3173 };
3174
store_rotate(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3175 static ssize_t store_rotate(struct device *device,
3176 struct device_attribute *attr, const char *buf,
3177 size_t count)
3178 {
3179 struct fb_info *info;
3180 int rotate, idx;
3181 char **last = NULL;
3182
3183 console_lock();
3184 idx = con2fb_map[fg_console];
3185
3186 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3187 goto err;
3188
3189 info = fbcon_registered_fb[idx];
3190 rotate = simple_strtoul(buf, last, 0);
3191 fbcon_rotate(info, rotate);
3192 err:
3193 console_unlock();
3194 return count;
3195 }
3196
store_rotate_all(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3197 static ssize_t store_rotate_all(struct device *device,
3198 struct device_attribute *attr,const char *buf,
3199 size_t count)
3200 {
3201 struct fb_info *info;
3202 int rotate, idx;
3203 char **last = NULL;
3204
3205 console_lock();
3206 idx = con2fb_map[fg_console];
3207
3208 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3209 goto err;
3210
3211 info = fbcon_registered_fb[idx];
3212 rotate = simple_strtoul(buf, last, 0);
3213 fbcon_rotate_all(info, rotate);
3214 err:
3215 console_unlock();
3216 return count;
3217 }
3218
show_rotate(struct device * device,struct device_attribute * attr,char * buf)3219 static ssize_t show_rotate(struct device *device,
3220 struct device_attribute *attr,char *buf)
3221 {
3222 struct fb_info *info;
3223 int rotate = 0, idx;
3224
3225 console_lock();
3226 idx = con2fb_map[fg_console];
3227
3228 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3229 goto err;
3230
3231 info = fbcon_registered_fb[idx];
3232 rotate = fbcon_get_rotate(info);
3233 err:
3234 console_unlock();
3235 return sysfs_emit(buf, "%d\n", rotate);
3236 }
3237
show_cursor_blink(struct device * device,struct device_attribute * attr,char * buf)3238 static ssize_t show_cursor_blink(struct device *device,
3239 struct device_attribute *attr, char *buf)
3240 {
3241 struct fb_info *info;
3242 struct fbcon_ops *ops;
3243 int idx, blink = -1;
3244
3245 console_lock();
3246 idx = con2fb_map[fg_console];
3247
3248 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3249 goto err;
3250
3251 info = fbcon_registered_fb[idx];
3252 ops = info->fbcon_par;
3253
3254 if (!ops)
3255 goto err;
3256
3257 blink = delayed_work_pending(&ops->cursor_work);
3258 err:
3259 console_unlock();
3260 return sysfs_emit(buf, "%d\n", blink);
3261 }
3262
store_cursor_blink(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3263 static ssize_t store_cursor_blink(struct device *device,
3264 struct device_attribute *attr,
3265 const char *buf, size_t count)
3266 {
3267 struct fb_info *info;
3268 int blink, idx;
3269 char **last = NULL;
3270
3271 console_lock();
3272 idx = con2fb_map[fg_console];
3273
3274 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3275 goto err;
3276
3277 info = fbcon_registered_fb[idx];
3278
3279 if (!info->fbcon_par)
3280 goto err;
3281
3282 blink = simple_strtoul(buf, last, 0);
3283
3284 if (blink) {
3285 fbcon_cursor_noblink = 0;
3286 fbcon_add_cursor_work(info);
3287 } else {
3288 fbcon_cursor_noblink = 1;
3289 fbcon_del_cursor_work(info);
3290 }
3291
3292 err:
3293 console_unlock();
3294 return count;
3295 }
3296
3297 static struct device_attribute device_attrs[] = {
3298 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3299 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3300 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3301 store_cursor_blink),
3302 };
3303
fbcon_init_device(void)3304 static int fbcon_init_device(void)
3305 {
3306 int i, error = 0;
3307
3308 fbcon_has_sysfs = 1;
3309
3310 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3311 error = device_create_file(fbcon_device, &device_attrs[i]);
3312
3313 if (error)
3314 break;
3315 }
3316
3317 if (error) {
3318 while (--i >= 0)
3319 device_remove_file(fbcon_device, &device_attrs[i]);
3320
3321 fbcon_has_sysfs = 0;
3322 }
3323
3324 return 0;
3325 }
3326
3327 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3328 static void fbcon_register_existing_fbs(struct work_struct *work)
3329 {
3330 int i;
3331
3332 console_lock();
3333
3334 deferred_takeover = false;
3335 logo_shown = FBCON_LOGO_DONTSHOW;
3336
3337 fbcon_for_each_registered_fb(i)
3338 do_fb_registered(fbcon_registered_fb[i]);
3339
3340 console_unlock();
3341 }
3342
3343 static struct notifier_block fbcon_output_nb;
3344 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3345
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3346 static int fbcon_output_notifier(struct notifier_block *nb,
3347 unsigned long action, void *data)
3348 {
3349 WARN_CONSOLE_UNLOCKED();
3350
3351 pr_info("fbcon: Taking over console\n");
3352
3353 dummycon_unregister_output_notifier(&fbcon_output_nb);
3354
3355 /* We may get called in atomic context */
3356 schedule_work(&fbcon_deferred_takeover_work);
3357
3358 return NOTIFY_OK;
3359 }
3360 #endif
3361
fbcon_start(void)3362 static void fbcon_start(void)
3363 {
3364 WARN_CONSOLE_UNLOCKED();
3365
3366 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3367 if (conswitchp != &dummy_con)
3368 deferred_takeover = false;
3369
3370 if (deferred_takeover) {
3371 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3372 dummycon_register_output_notifier(&fbcon_output_nb);
3373 return;
3374 }
3375 #endif
3376 }
3377
fb_console_init(void)3378 void __init fb_console_init(void)
3379 {
3380 int i;
3381
3382 console_lock();
3383 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3384 "fbcon");
3385
3386 if (IS_ERR(fbcon_device)) {
3387 printk(KERN_WARNING "Unable to create device "
3388 "for fbcon; errno = %ld\n",
3389 PTR_ERR(fbcon_device));
3390 fbcon_device = NULL;
3391 } else
3392 fbcon_init_device();
3393
3394 for (i = 0; i < MAX_NR_CONSOLES; i++)
3395 con2fb_map[i] = -1;
3396
3397 fbcon_start();
3398 console_unlock();
3399 }
3400
3401 #ifdef MODULE
3402
fbcon_deinit_device(void)3403 static void __exit fbcon_deinit_device(void)
3404 {
3405 int i;
3406
3407 if (fbcon_has_sysfs) {
3408 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3409 device_remove_file(fbcon_device, &device_attrs[i]);
3410
3411 fbcon_has_sysfs = 0;
3412 }
3413 }
3414
fb_console_exit(void)3415 void __exit fb_console_exit(void)
3416 {
3417 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3418 console_lock();
3419 if (deferred_takeover)
3420 dummycon_unregister_output_notifier(&fbcon_output_nb);
3421 console_unlock();
3422
3423 cancel_work_sync(&fbcon_deferred_takeover_work);
3424 #endif
3425
3426 console_lock();
3427 fbcon_deinit_device();
3428 device_destroy(fb_class, MKDEV(0, 0));
3429
3430 do_unregister_con_driver(&fb_con);
3431 console_unlock();
3432 }
3433 #endif
3434