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