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