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 signed char fb;
119 WARN_CONSOLE_UNLOCKED();
120
121 fb = con2fb_map[console];
122 if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb))
123 return NULL;
124
125 return fbcon_registered_fb[fb];
126 }
127
128 static int logo_lines;
129 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
130 enums. */
131 static int logo_shown = FBCON_LOGO_CANSHOW;
132 /* console mappings */
133 static unsigned int first_fb_vc;
134 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
135 static int fbcon_is_default = 1;
136 static int primary_device = -1;
137 static int fbcon_has_console_bind;
138
139 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
140 static int map_override;
141
fbcon_map_override(void)142 static inline void fbcon_map_override(void)
143 {
144 map_override = 1;
145 }
146 #else
fbcon_map_override(void)147 static inline void fbcon_map_override(void)
148 {
149 }
150 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
151
152 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
153 static bool deferred_takeover = true;
154 #else
155 #define deferred_takeover false
156 #endif
157
158 /* font data */
159 static char fontname[40];
160
161 /* current fb_info */
162 static int info_idx = -1;
163
164 /* console rotation */
165 static int initial_rotation = -1;
166 static int fbcon_has_sysfs;
167 static int margin_color;
168
169 static const struct consw fb_con;
170
171 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
172
173 static int fbcon_cursor_noblink;
174
175 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
176
177 /*
178 * Interface used by the world
179 */
180
181 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
182 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
183
184 /*
185 * Internal routines
186 */
187 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
188 int unit);
189 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
190 int line, int count, int dy);
191 static void fbcon_modechanged(struct fb_info *info);
192 static void fbcon_set_all_vcs(struct fb_info *info);
193
194 static struct device *fbcon_device;
195
196 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
fbcon_set_rotation(struct fb_info * info)197 static inline void fbcon_set_rotation(struct fb_info *info)
198 {
199 struct fbcon_ops *ops = info->fbcon_par;
200
201 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
202 ops->p->con_rotate < 4)
203 ops->rotate = ops->p->con_rotate;
204 else
205 ops->rotate = 0;
206 }
207
fbcon_rotate(struct fb_info * info,u32 rotate)208 static void fbcon_rotate(struct fb_info *info, u32 rotate)
209 {
210 struct fbcon_ops *ops= info->fbcon_par;
211 struct fb_info *fb_info;
212
213 if (!ops || ops->currcon == -1)
214 return;
215
216 fb_info = fbcon_info_from_console(ops->currcon);
217
218 if (info == fb_info) {
219 struct fbcon_display *p = &fb_display[ops->currcon];
220
221 if (rotate < 4)
222 p->con_rotate = rotate;
223 else
224 p->con_rotate = 0;
225
226 fbcon_modechanged(info);
227 }
228 }
229
fbcon_rotate_all(struct fb_info * info,u32 rotate)230 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
231 {
232 struct fbcon_ops *ops = info->fbcon_par;
233 struct vc_data *vc;
234 struct fbcon_display *p;
235 int i;
236
237 if (!ops || ops->currcon < 0 || rotate > 3)
238 return;
239
240 for (i = first_fb_vc; i <= last_fb_vc; i++) {
241 vc = vc_cons[i].d;
242 if (!vc || vc->vc_mode != KD_TEXT ||
243 fbcon_info_from_console(i) != info)
244 continue;
245
246 p = &fb_display[vc->vc_num];
247 p->con_rotate = rotate;
248 }
249
250 fbcon_set_all_vcs(info);
251 }
252 #else
fbcon_set_rotation(struct fb_info * info)253 static inline void fbcon_set_rotation(struct fb_info *info)
254 {
255 struct fbcon_ops *ops = info->fbcon_par;
256
257 ops->rotate = FB_ROTATE_UR;
258 }
259
fbcon_rotate(struct fb_info * info,u32 rotate)260 static void fbcon_rotate(struct fb_info *info, u32 rotate)
261 {
262 return;
263 }
264
fbcon_rotate_all(struct fb_info * info,u32 rotate)265 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
266 {
267 return;
268 }
269 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
270
fbcon_get_rotate(struct fb_info * info)271 static int fbcon_get_rotate(struct fb_info *info)
272 {
273 struct fbcon_ops *ops = info->fbcon_par;
274
275 return (ops) ? ops->rotate : 0;
276 }
277
fbcon_is_inactive(struct vc_data * vc,struct fb_info * info)278 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
279 {
280 struct fbcon_ops *ops = info->fbcon_par;
281
282 return (info->state != FBINFO_STATE_RUNNING ||
283 vc->vc_mode != KD_TEXT || ops->graphics);
284 }
285
get_color(struct vc_data * vc,struct fb_info * info,u16 c,int is_fg)286 static int get_color(struct vc_data *vc, struct fb_info *info,
287 u16 c, int is_fg)
288 {
289 int depth = fb_get_color_depth(&info->var, &info->fix);
290 int color = 0;
291
292 if (console_blanked) {
293 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
294
295 c = vc->vc_video_erase_char & charmask;
296 }
297
298 if (depth != 1)
299 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
300 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
301
302 switch (depth) {
303 case 1:
304 {
305 int col = mono_col(info);
306 /* 0 or 1 */
307 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
308 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
309
310 if (console_blanked)
311 fg = bg;
312
313 color = (is_fg) ? fg : bg;
314 break;
315 }
316 case 2:
317 /*
318 * Scale down 16-colors to 4 colors. Default 4-color palette
319 * is grayscale. However, simply dividing the values by 4
320 * will not work, as colors 1, 2 and 3 will be scaled-down
321 * to zero rendering them invisible. So empirically convert
322 * colors to a sane 4-level grayscale.
323 */
324 switch (color) {
325 case 0:
326 color = 0; /* black */
327 break;
328 case 1 ... 6:
329 color = 2; /* white */
330 break;
331 case 7 ... 8:
332 color = 1; /* gray */
333 break;
334 default:
335 color = 3; /* intense white */
336 break;
337 }
338 break;
339 case 3:
340 /*
341 * Last 8 entries of default 16-color palette is a more intense
342 * version of the first 8 (i.e., same chrominance, different
343 * luminance).
344 */
345 color &= 7;
346 break;
347 }
348
349
350 return color;
351 }
352
fb_flashcursor(struct work_struct * work)353 static void fb_flashcursor(struct work_struct *work)
354 {
355 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work);
356 struct fb_info *info;
357 struct vc_data *vc = NULL;
358 int c;
359 int mode;
360 int ret;
361
362 /* FIXME: we should sort out the unbind locking instead */
363 /* instead we just fail to flash the cursor if we can't get
364 * the lock instead of blocking fbcon deinit */
365 ret = console_trylock();
366 if (ret == 0)
367 return;
368
369 /* protected by console_lock */
370 info = ops->info;
371
372 if (ops->currcon != -1)
373 vc = vc_cons[ops->currcon].d;
374
375 if (!vc || !con_is_visible(vc) ||
376 fbcon_info_from_console(vc->vc_num) != info ||
377 vc->vc_deccm != 1) {
378 console_unlock();
379 return;
380 }
381
382 c = scr_readw((u16 *) vc->vc_pos);
383 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
384 CM_ERASE : CM_DRAW;
385 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
386 get_color(vc, info, c, 0));
387 console_unlock();
388
389 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
390 ops->cur_blink_jiffies);
391 }
392
fbcon_add_cursor_work(struct fb_info * info)393 static void fbcon_add_cursor_work(struct fb_info *info)
394 {
395 struct fbcon_ops *ops = info->fbcon_par;
396
397 if (!fbcon_cursor_noblink)
398 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
399 ops->cur_blink_jiffies);
400 }
401
fbcon_del_cursor_work(struct fb_info * info)402 static void fbcon_del_cursor_work(struct fb_info *info)
403 {
404 struct fbcon_ops *ops = info->fbcon_par;
405
406 cancel_delayed_work_sync(&ops->cursor_work);
407 }
408
409 #ifndef MODULE
fb_console_setup(char * this_opt)410 static int __init fb_console_setup(char *this_opt)
411 {
412 char *options;
413 int i, j;
414
415 if (!this_opt || !*this_opt)
416 return 1;
417
418 while ((options = strsep(&this_opt, ",")) != NULL) {
419 if (!strncmp(options, "font:", 5)) {
420 strscpy(fontname, options + 5, sizeof(fontname));
421 continue;
422 }
423
424 if (!strncmp(options, "scrollback:", 11)) {
425 pr_warn("Ignoring scrollback size option\n");
426 continue;
427 }
428
429 if (!strncmp(options, "map:", 4)) {
430 options += 4;
431 if (*options) {
432 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
433 if (!options[j])
434 j = 0;
435 con2fb_map_boot[i] =
436 (options[j++]-'0') % FB_MAX;
437 }
438
439 fbcon_map_override();
440 }
441 continue;
442 }
443
444 if (!strncmp(options, "vc:", 3)) {
445 options += 3;
446 if (*options)
447 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
448 if (first_fb_vc >= MAX_NR_CONSOLES)
449 first_fb_vc = 0;
450 if (*options++ == '-')
451 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
452 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
453 last_fb_vc = MAX_NR_CONSOLES - 1;
454 fbcon_is_default = 0;
455 continue;
456 }
457
458 if (!strncmp(options, "rotate:", 7)) {
459 options += 7;
460 if (*options)
461 initial_rotation = simple_strtoul(options, &options, 0);
462 if (initial_rotation > 3)
463 initial_rotation = 0;
464 continue;
465 }
466
467 if (!strncmp(options, "margin:", 7)) {
468 options += 7;
469 if (*options)
470 margin_color = simple_strtoul(options, &options, 0);
471 continue;
472 }
473 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
474 if (!strcmp(options, "nodefer")) {
475 deferred_takeover = false;
476 continue;
477 }
478 #endif
479
480 if (!strncmp(options, "logo-pos:", 9)) {
481 options += 9;
482 if (!strcmp(options, "center"))
483 fb_center_logo = true;
484 continue;
485 }
486
487 if (!strncmp(options, "logo-count:", 11)) {
488 options += 11;
489 if (*options)
490 fb_logo_count = simple_strtol(options, &options, 0);
491 continue;
492 }
493 }
494 return 1;
495 }
496
497 __setup("fbcon=", fb_console_setup);
498 #endif
499
search_fb_in_map(int idx)500 static int search_fb_in_map(int idx)
501 {
502 int i, retval = 0;
503
504 for (i = first_fb_vc; i <= last_fb_vc; i++) {
505 if (con2fb_map[i] == idx)
506 retval = 1;
507 }
508 return retval;
509 }
510
search_for_mapped_con(void)511 static int search_for_mapped_con(void)
512 {
513 int i, retval = 0;
514
515 for (i = first_fb_vc; i <= last_fb_vc; i++) {
516 if (con2fb_map[i] != -1)
517 retval = 1;
518 }
519 return retval;
520 }
521
do_fbcon_takeover(int show_logo)522 static int do_fbcon_takeover(int show_logo)
523 {
524 int err, i;
525
526 if (!fbcon_num_registered_fb)
527 return -ENODEV;
528
529 if (!show_logo)
530 logo_shown = FBCON_LOGO_DONTSHOW;
531
532 for (i = first_fb_vc; i <= last_fb_vc; i++)
533 con2fb_map[i] = info_idx;
534
535 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
536 fbcon_is_default);
537
538 if (err) {
539 for (i = first_fb_vc; i <= last_fb_vc; i++)
540 con2fb_map[i] = -1;
541 info_idx = -1;
542 } else {
543 fbcon_has_console_bind = 1;
544 }
545
546 return err;
547 }
548
549 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)550 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
551 int cols, int rows, int new_cols, int new_rows)
552 {
553 logo_shown = FBCON_LOGO_DONTSHOW;
554 }
555 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)556 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
557 int cols, int rows, int new_cols, int new_rows)
558 {
559 /* Need to make room for the logo */
560 struct fbcon_ops *ops = info->fbcon_par;
561 int cnt, erase = vc->vc_video_erase_char, step;
562 unsigned short *save = NULL, *r, *q;
563 int logo_height;
564
565 if (info->fbops->owner) {
566 logo_shown = FBCON_LOGO_DONTSHOW;
567 return;
568 }
569
570 /*
571 * remove underline attribute from erase character
572 * if black and white framebuffer.
573 */
574 if (fb_get_color_depth(&info->var, &info->fix) == 1)
575 erase &= ~0x400;
576 logo_height = fb_prepare_logo(info, ops->rotate);
577 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
578 q = (unsigned short *) (vc->vc_origin +
579 vc->vc_size_row * rows);
580 step = logo_lines * cols;
581 for (r = q - logo_lines * cols; r < q; r++)
582 if (scr_readw(r) != vc->vc_video_erase_char)
583 break;
584 if (r != q && new_rows >= rows + logo_lines) {
585 save = kmalloc(array3_size(logo_lines, new_cols, 2),
586 GFP_KERNEL);
587 if (save) {
588 int i = min(cols, new_cols);
589 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
590 r = q - step;
591 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
592 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
593 r = q;
594 }
595 }
596 if (r == q) {
597 /* We can scroll screen down */
598 r = q - step - cols;
599 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
600 scr_memcpyw(r + step, r, vc->vc_size_row);
601 r -= cols;
602 }
603 if (!save) {
604 int lines;
605 if (vc->state.y + logo_lines >= rows)
606 lines = rows - vc->state.y - 1;
607 else
608 lines = logo_lines;
609 vc->state.y += lines;
610 vc->vc_pos += lines * vc->vc_size_row;
611 }
612 }
613 scr_memsetw((unsigned short *) vc->vc_origin,
614 erase,
615 vc->vc_size_row * logo_lines);
616
617 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
618 fbcon_clear_margins(vc, 0);
619 update_screen(vc);
620 }
621
622 if (save) {
623 q = (unsigned short *) (vc->vc_origin +
624 vc->vc_size_row *
625 rows);
626 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
627 vc->state.y += logo_lines;
628 vc->vc_pos += logo_lines * vc->vc_size_row;
629 kfree(save);
630 }
631
632 if (logo_shown == FBCON_LOGO_DONTSHOW)
633 return;
634
635 if (logo_lines > vc->vc_bottom) {
636 logo_shown = FBCON_LOGO_CANSHOW;
637 printk(KERN_INFO
638 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
639 } else {
640 logo_shown = FBCON_LOGO_DRAW;
641 vc->vc_top = logo_lines;
642 }
643 }
644 #endif /* MODULE */
645
646 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)647 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
648 {
649 struct fbcon_ops *ops = info->fbcon_par;
650
651 ops->p = &fb_display[vc->vc_num];
652
653 if ((info->flags & FBINFO_MISC_TILEBLITTING))
654 fbcon_set_tileops(vc, info);
655 else {
656 fbcon_set_rotation(info);
657 fbcon_set_bitops(ops);
658 }
659 }
660
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)661 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
662 {
663 int err = 0;
664
665 if (info->flags & FBINFO_MISC_TILEBLITTING &&
666 info->tileops->fb_get_tilemax(info) < charcount)
667 err = 1;
668
669 return err;
670 }
671 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)672 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
673 {
674 struct fbcon_ops *ops = info->fbcon_par;
675
676 info->flags &= ~FBINFO_MISC_TILEBLITTING;
677 ops->p = &fb_display[vc->vc_num];
678 fbcon_set_rotation(info);
679 fbcon_set_bitops(ops);
680 }
681
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)682 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
683 {
684 return 0;
685 }
686
687 #endif /* CONFIG_MISC_TILEBLITTING */
688
fbcon_release(struct fb_info * info)689 static void fbcon_release(struct fb_info *info)
690 {
691 lock_fb_info(info);
692 if (info->fbops->fb_release)
693 info->fbops->fb_release(info, 0);
694 unlock_fb_info(info);
695
696 module_put(info->fbops->owner);
697
698 if (info->fbcon_par) {
699 struct fbcon_ops *ops = info->fbcon_par;
700
701 fbcon_del_cursor_work(info);
702 kfree(ops->cursor_state.mask);
703 kfree(ops->cursor_data);
704 kfree(ops->cursor_src);
705 kfree(ops->fontbuffer);
706 kfree(info->fbcon_par);
707 info->fbcon_par = NULL;
708 }
709 }
710
fbcon_open(struct fb_info * info)711 static int fbcon_open(struct fb_info *info)
712 {
713 struct fbcon_ops *ops;
714
715 if (!try_module_get(info->fbops->owner))
716 return -ENODEV;
717
718 lock_fb_info(info);
719 if (info->fbops->fb_open &&
720 info->fbops->fb_open(info, 0)) {
721 unlock_fb_info(info);
722 module_put(info->fbops->owner);
723 return -ENODEV;
724 }
725 unlock_fb_info(info);
726
727 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
728 if (!ops) {
729 fbcon_release(info);
730 return -ENOMEM;
731 }
732
733 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor);
734 ops->info = info;
735 info->fbcon_par = ops;
736 ops->cur_blink_jiffies = HZ / 5;
737
738 return 0;
739 }
740
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit)741 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
742 int unit)
743 {
744 int err;
745
746 err = fbcon_open(info);
747 if (err)
748 return err;
749
750 if (vc)
751 set_blitting_type(vc, info);
752
753 return err;
754 }
755
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo)756 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
757 struct fb_info *newinfo)
758 {
759 int ret;
760
761 fbcon_release(oldinfo);
762
763 /*
764 If oldinfo and newinfo are driving the same hardware,
765 the fb_release() method of oldinfo may attempt to
766 restore the hardware state. This will leave the
767 newinfo in an undefined state. Thus, a call to
768 fb_set_par() may be needed for the newinfo.
769 */
770 if (newinfo && newinfo->fbops->fb_set_par) {
771 ret = newinfo->fbops->fb_set_par(newinfo);
772
773 if (ret)
774 printk(KERN_ERR "con2fb_release_oldinfo: "
775 "detected unhandled fb_set_par error, "
776 "error code %d\n", ret);
777 }
778 }
779
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)780 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
781 int unit, int show_logo)
782 {
783 struct fbcon_ops *ops = info->fbcon_par;
784 int ret;
785
786 ops->currcon = fg_console;
787
788 if (info->fbops->fb_set_par && !ops->initialized) {
789 ret = info->fbops->fb_set_par(info);
790
791 if (ret)
792 printk(KERN_ERR "con2fb_init_display: detected "
793 "unhandled fb_set_par error, "
794 "error code %d\n", ret);
795 }
796
797 ops->initialized = true;
798 ops->graphics = 0;
799 fbcon_set_disp(info, &info->var, unit);
800
801 if (show_logo) {
802 struct vc_data *fg_vc = vc_cons[fg_console].d;
803 struct fb_info *fg_info =
804 fbcon_info_from_console(fg_console);
805
806 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
807 fg_vc->vc_rows, fg_vc->vc_cols,
808 fg_vc->vc_rows);
809 }
810
811 update_screen(vc_cons[fg_console].d);
812 }
813
814 /**
815 * set_con2fb_map - map console to frame buffer device
816 * @unit: virtual console number to map
817 * @newidx: frame buffer index to map virtual console to
818 * @user: user request
819 *
820 * Maps a virtual console @unit to a frame buffer device
821 * @newidx.
822 *
823 * This should be called with the console lock held.
824 */
set_con2fb_map(int unit,int newidx,int user)825 static int set_con2fb_map(int unit, int newidx, int user)
826 {
827 struct vc_data *vc = vc_cons[unit].d;
828 int oldidx = con2fb_map[unit];
829 struct fb_info *info = fbcon_registered_fb[newidx];
830 struct fb_info *oldinfo = NULL;
831 int err = 0, show_logo;
832
833 WARN_CONSOLE_UNLOCKED();
834
835 if (oldidx == newidx)
836 return 0;
837
838 if (!info)
839 return -EINVAL;
840
841 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
842 info_idx = newidx;
843 return do_fbcon_takeover(0);
844 }
845
846 if (oldidx != -1)
847 oldinfo = fbcon_registered_fb[oldidx];
848
849 if (!search_fb_in_map(newidx)) {
850 err = con2fb_acquire_newinfo(vc, info, unit);
851 if (err)
852 return err;
853
854 fbcon_add_cursor_work(info);
855 } else if (vc) {
856 set_blitting_type(vc, info);
857 }
858
859 con2fb_map[unit] = newidx;
860
861 /*
862 * If old fb is not mapped to any of the consoles,
863 * fbcon should release it.
864 */
865 if (oldinfo && !search_fb_in_map(oldidx))
866 con2fb_release_oldinfo(vc, oldinfo, info);
867
868 show_logo = (fg_console == 0 && !user &&
869 logo_shown != FBCON_LOGO_DONTSHOW);
870
871 con2fb_map_boot[unit] = newidx;
872 con2fb_init_display(vc, info, unit, show_logo);
873
874 if (!search_fb_in_map(info_idx))
875 info_idx = newidx;
876
877 return err;
878 }
879
880 /*
881 * Low Level Operations
882 */
883 /* 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)884 static int var_to_display(struct fbcon_display *disp,
885 struct fb_var_screeninfo *var,
886 struct fb_info *info)
887 {
888 disp->xres_virtual = var->xres_virtual;
889 disp->yres_virtual = var->yres_virtual;
890 disp->bits_per_pixel = var->bits_per_pixel;
891 disp->grayscale = var->grayscale;
892 disp->nonstd = var->nonstd;
893 disp->accel_flags = var->accel_flags;
894 disp->height = var->height;
895 disp->width = var->width;
896 disp->red = var->red;
897 disp->green = var->green;
898 disp->blue = var->blue;
899 disp->transp = var->transp;
900 disp->rotate = var->rotate;
901 disp->mode = fb_match_mode(var, &info->modelist);
902 if (disp->mode == NULL)
903 /* This should not happen */
904 return -EINVAL;
905 return 0;
906 }
907
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)908 static void display_to_var(struct fb_var_screeninfo *var,
909 struct fbcon_display *disp)
910 {
911 fb_videomode_to_var(var, disp->mode);
912 var->xres_virtual = disp->xres_virtual;
913 var->yres_virtual = disp->yres_virtual;
914 var->bits_per_pixel = disp->bits_per_pixel;
915 var->grayscale = disp->grayscale;
916 var->nonstd = disp->nonstd;
917 var->accel_flags = disp->accel_flags;
918 var->height = disp->height;
919 var->width = disp->width;
920 var->red = disp->red;
921 var->green = disp->green;
922 var->blue = disp->blue;
923 var->transp = disp->transp;
924 var->rotate = disp->rotate;
925 }
926
fbcon_startup(void)927 static const char *fbcon_startup(void)
928 {
929 const char *display_desc = "frame buffer device";
930 struct fbcon_display *p = &fb_display[fg_console];
931 struct vc_data *vc = vc_cons[fg_console].d;
932 const struct font_desc *font = NULL;
933 struct fb_info *info = NULL;
934 struct fbcon_ops *ops;
935 int rows, cols;
936
937 /*
938 * If num_registered_fb is zero, this is a call for the dummy part.
939 * The frame buffer devices weren't initialized yet.
940 */
941 if (!fbcon_num_registered_fb || info_idx == -1)
942 return display_desc;
943 /*
944 * Instead of blindly using registered_fb[0], we use info_idx, set by
945 * fbcon_fb_registered();
946 */
947 info = fbcon_registered_fb[info_idx];
948 if (!info)
949 return NULL;
950
951 if (fbcon_open(info))
952 return NULL;
953
954 ops = info->fbcon_par;
955 ops->currcon = -1;
956 ops->graphics = 1;
957 ops->cur_rotate = -1;
958
959 p->con_rotate = initial_rotation;
960 if (p->con_rotate == -1)
961 p->con_rotate = info->fbcon_rotate_hint;
962 if (p->con_rotate == -1)
963 p->con_rotate = FB_ROTATE_UR;
964
965 set_blitting_type(vc, info);
966
967 /* Setup default font */
968 if (!p->fontdata) {
969 if (!fontname[0] || !(font = find_font(fontname)))
970 font = get_default_font(info->var.xres,
971 info->var.yres,
972 info->pixmap.blit_x,
973 info->pixmap.blit_y);
974 vc->vc_font.width = font->width;
975 vc->vc_font.height = font->height;
976 vc->vc_font.data = (void *)(p->fontdata = font->data);
977 vc->vc_font.charcount = font->charcount;
978 }
979
980 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
981 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
982 cols /= vc->vc_font.width;
983 rows /= vc->vc_font.height;
984 vc_resize(vc, cols, rows);
985
986 pr_debug("mode: %s\n", info->fix.id);
987 pr_debug("visual: %d\n", info->fix.visual);
988 pr_debug("res: %dx%d-%d\n", info->var.xres,
989 info->var.yres,
990 info->var.bits_per_pixel);
991
992 fbcon_add_cursor_work(info);
993 return display_desc;
994 }
995
fbcon_init(struct vc_data * vc,bool init)996 static void fbcon_init(struct vc_data *vc, bool init)
997 {
998 struct fb_info *info;
999 struct fbcon_ops *ops;
1000 struct vc_data **default_mode = vc->vc_display_fg;
1001 struct vc_data *svc = *default_mode;
1002 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1003 int logo = 1, new_rows, new_cols, rows, cols;
1004 int ret;
1005
1006 if (WARN_ON(info_idx == -1))
1007 return;
1008
1009 if (con2fb_map[vc->vc_num] == -1)
1010 con2fb_map[vc->vc_num] = info_idx;
1011
1012 info = fbcon_info_from_console(vc->vc_num);
1013
1014 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1015 logo_shown = FBCON_LOGO_DONTSHOW;
1016
1017 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1018 (info->fix.type == FB_TYPE_TEXT))
1019 logo = 0;
1020
1021 if (var_to_display(p, &info->var, info))
1022 return;
1023
1024 if (!info->fbcon_par)
1025 con2fb_acquire_newinfo(vc, info, vc->vc_num);
1026
1027 /* If we are not the first console on this
1028 fb, copy the font from that console */
1029 t = &fb_display[fg_console];
1030 if (!p->fontdata) {
1031 if (t->fontdata) {
1032 struct vc_data *fvc = vc_cons[fg_console].d;
1033
1034 vc->vc_font.data = (void *)(p->fontdata =
1035 fvc->vc_font.data);
1036 vc->vc_font.width = fvc->vc_font.width;
1037 vc->vc_font.height = fvc->vc_font.height;
1038 vc->vc_font.charcount = fvc->vc_font.charcount;
1039 p->userfont = t->userfont;
1040
1041 if (p->userfont)
1042 REFCOUNT(p->fontdata)++;
1043 } else {
1044 const struct font_desc *font = NULL;
1045
1046 if (!fontname[0] || !(font = find_font(fontname)))
1047 font = get_default_font(info->var.xres,
1048 info->var.yres,
1049 info->pixmap.blit_x,
1050 info->pixmap.blit_y);
1051 vc->vc_font.width = font->width;
1052 vc->vc_font.height = font->height;
1053 vc->vc_font.data = (void *)(p->fontdata = font->data);
1054 vc->vc_font.charcount = font->charcount;
1055 }
1056 }
1057
1058 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1059 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1060 if (vc->vc_font.charcount == 256) {
1061 vc->vc_hi_font_mask = 0;
1062 } else {
1063 vc->vc_hi_font_mask = 0x100;
1064 if (vc->vc_can_do_color)
1065 vc->vc_complement_mask <<= 1;
1066 }
1067
1068 if (!*svc->uni_pagedict_loc)
1069 con_set_default_unimap(svc);
1070 if (!*vc->uni_pagedict_loc)
1071 con_copy_unimap(vc, svc);
1072
1073 ops = info->fbcon_par;
1074 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1075
1076 p->con_rotate = initial_rotation;
1077 if (p->con_rotate == -1)
1078 p->con_rotate = info->fbcon_rotate_hint;
1079 if (p->con_rotate == -1)
1080 p->con_rotate = FB_ROTATE_UR;
1081
1082 set_blitting_type(vc, info);
1083
1084 cols = vc->vc_cols;
1085 rows = vc->vc_rows;
1086 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1087 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1088 new_cols /= vc->vc_font.width;
1089 new_rows /= vc->vc_font.height;
1090
1091 /*
1092 * We must always set the mode. The mode of the previous console
1093 * driver could be in the same resolution but we are using different
1094 * hardware so we have to initialize the hardware.
1095 *
1096 * We need to do it in fbcon_init() to prevent screen corruption.
1097 */
1098 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1099 if (info->fbops->fb_set_par && !ops->initialized) {
1100 ret = info->fbops->fb_set_par(info);
1101
1102 if (ret)
1103 printk(KERN_ERR "fbcon_init: detected "
1104 "unhandled fb_set_par error, "
1105 "error code %d\n", ret);
1106 }
1107
1108 ops->initialized = true;
1109 }
1110
1111 ops->graphics = 0;
1112
1113 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1114 if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
1115 !(info->flags & FBINFO_HWACCEL_DISABLED))
1116 p->scrollmode = SCROLL_MOVE;
1117 else /* default to something safe */
1118 p->scrollmode = SCROLL_REDRAW;
1119 #endif
1120
1121 /*
1122 * ++guenther: console.c:vc_allocate() relies on initializing
1123 * vc_{cols,rows}, but we must not set those if we are only
1124 * resizing the console.
1125 */
1126 if (init) {
1127 vc->vc_cols = new_cols;
1128 vc->vc_rows = new_rows;
1129 } else
1130 vc_resize(vc, new_cols, new_rows);
1131
1132 if (logo)
1133 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1134
1135 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1136 ops->rotate = FB_ROTATE_UR;
1137 set_blitting_type(vc, info);
1138 }
1139
1140 ops->p = &fb_display[fg_console];
1141 }
1142
fbcon_free_font(struct fbcon_display * p)1143 static void fbcon_free_font(struct fbcon_display *p)
1144 {
1145 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1146 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1147 p->fontdata = NULL;
1148 p->userfont = 0;
1149 }
1150
1151 static void set_vc_hi_font(struct vc_data *vc, bool set);
1152
fbcon_release_all(void)1153 static void fbcon_release_all(void)
1154 {
1155 struct fb_info *info;
1156 int i, j, mapped;
1157
1158 fbcon_for_each_registered_fb(i) {
1159 mapped = 0;
1160 info = fbcon_registered_fb[i];
1161
1162 for (j = first_fb_vc; j <= last_fb_vc; j++) {
1163 if (con2fb_map[j] == i) {
1164 mapped = 1;
1165 con2fb_map[j] = -1;
1166 }
1167 }
1168
1169 if (mapped)
1170 fbcon_release(info);
1171 }
1172 }
1173
fbcon_deinit(struct vc_data * vc)1174 static void fbcon_deinit(struct vc_data *vc)
1175 {
1176 struct fbcon_display *p = &fb_display[vc->vc_num];
1177 struct fb_info *info;
1178 struct fbcon_ops *ops;
1179 int idx;
1180
1181 fbcon_free_font(p);
1182 idx = con2fb_map[vc->vc_num];
1183
1184 if (idx == -1)
1185 goto finished;
1186
1187 info = fbcon_registered_fb[idx];
1188
1189 if (!info)
1190 goto finished;
1191
1192 ops = info->fbcon_par;
1193
1194 if (!ops)
1195 goto finished;
1196
1197 if (con_is_visible(vc))
1198 fbcon_del_cursor_work(info);
1199
1200 ops->initialized = false;
1201 finished:
1202
1203 fbcon_free_font(p);
1204 vc->vc_font.data = NULL;
1205
1206 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1207 set_vc_hi_font(vc, false);
1208
1209 if (!con_is_bound(&fb_con))
1210 fbcon_release_all();
1211
1212 if (vc->vc_num == logo_shown)
1213 logo_shown = FBCON_LOGO_CANSHOW;
1214
1215 return;
1216 }
1217
1218 /* ====================================================================== */
1219
1220 /* fbcon_XXX routines - interface used by the world
1221 *
1222 * This system is now divided into two levels because of complications
1223 * caused by hardware scrolling. Top level functions:
1224 *
1225 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1226 *
1227 * handles y values in range [0, scr_height-1] that correspond to real
1228 * screen positions. y_wrap shift means that first line of bitmap may be
1229 * anywhere on this display. These functions convert lineoffsets to
1230 * bitmap offsets and deal with the wrap-around case by splitting blits.
1231 *
1232 * fbcon_bmove_physical_8() -- These functions fast implementations
1233 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1234 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1235 *
1236 * WARNING:
1237 *
1238 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1239 * Implies should only really hardware scroll in rows. Only reason for
1240 * restriction is simplicity & efficiency at the moment.
1241 */
1242
__fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int height,unsigned int width)1243 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1244 unsigned int height, unsigned int width)
1245 {
1246 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1247 struct fbcon_ops *ops = info->fbcon_par;
1248 int fg, bg;
1249 struct fbcon_display *p = &fb_display[vc->vc_num];
1250 u_int y_break;
1251
1252 if (fbcon_is_inactive(vc, info))
1253 return;
1254
1255 if (!height || !width)
1256 return;
1257
1258 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1259 vc->vc_top = 0;
1260 /*
1261 * If the font dimensions are not an integral of the display
1262 * dimensions then the ops->clear below won't end up clearing
1263 * the margins. Call clear_margins here in case the logo
1264 * bitmap stretched into the margin area.
1265 */
1266 fbcon_clear_margins(vc, 0);
1267 }
1268
1269 fg = get_color(vc, info, vc->vc_video_erase_char, 1);
1270 bg = get_color(vc, info, vc->vc_video_erase_char, 0);
1271 /* Split blits that cross physical y_wrap boundary */
1272
1273 y_break = p->vrows - p->yscroll;
1274 if (sy < y_break && sy + height - 1 >= y_break) {
1275 u_int b = y_break - sy;
1276 ops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg);
1277 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1278 width, fg, bg);
1279 } else
1280 ops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg);
1281 }
1282
fbcon_clear(struct vc_data * vc,unsigned int sy,unsigned int sx,unsigned int width)1283 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx,
1284 unsigned int width)
1285 {
1286 __fbcon_clear(vc, sy, sx, 1, width);
1287 }
1288
fbcon_putcs(struct vc_data * vc,const unsigned short * s,int count,int ypos,int xpos)1289 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1290 int count, int ypos, int xpos)
1291 {
1292 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1293 struct fbcon_display *p = &fb_display[vc->vc_num];
1294 struct fbcon_ops *ops = info->fbcon_par;
1295
1296 if (!fbcon_is_inactive(vc, info))
1297 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1298 get_color(vc, info, scr_readw(s), 1),
1299 get_color(vc, info, scr_readw(s), 0));
1300 }
1301
fbcon_putc(struct vc_data * vc,int c,int ypos,int xpos)1302 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1303 {
1304 unsigned short chr;
1305
1306 scr_writew(c, &chr);
1307 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1308 }
1309
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1310 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1311 {
1312 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1313 struct fbcon_ops *ops = info->fbcon_par;
1314
1315 if (!fbcon_is_inactive(vc, info))
1316 ops->clear_margins(vc, info, margin_color, bottom_only);
1317 }
1318
fbcon_cursor(struct vc_data * vc,int mode)1319 static void fbcon_cursor(struct vc_data *vc, int mode)
1320 {
1321 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1322 struct fbcon_ops *ops = info->fbcon_par;
1323 int c = scr_readw((u16 *) vc->vc_pos);
1324
1325 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1326
1327 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1328 return;
1329
1330 if (vc->vc_cursor_type & CUR_SW)
1331 fbcon_del_cursor_work(info);
1332 else
1333 fbcon_add_cursor_work(info);
1334
1335 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1336
1337 if (!ops->cursor)
1338 return;
1339
1340 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1341 get_color(vc, info, c, 0));
1342 }
1343
1344 static int scrollback_phys_max = 0;
1345 static int scrollback_max = 0;
1346 static int scrollback_current = 0;
1347
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1348 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1349 int unit)
1350 {
1351 struct fbcon_display *p, *t;
1352 struct vc_data **default_mode, *vc;
1353 struct vc_data *svc;
1354 struct fbcon_ops *ops = info->fbcon_par;
1355 int rows, cols;
1356
1357 p = &fb_display[unit];
1358
1359 if (var_to_display(p, var, info))
1360 return;
1361
1362 vc = vc_cons[unit].d;
1363
1364 if (!vc)
1365 return;
1366
1367 default_mode = vc->vc_display_fg;
1368 svc = *default_mode;
1369 t = &fb_display[svc->vc_num];
1370
1371 if (!vc->vc_font.data) {
1372 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1373 vc->vc_font.width = (*default_mode)->vc_font.width;
1374 vc->vc_font.height = (*default_mode)->vc_font.height;
1375 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1376 p->userfont = t->userfont;
1377 if (p->userfont)
1378 REFCOUNT(p->fontdata)++;
1379 }
1380
1381 var->activate = FB_ACTIVATE_NOW;
1382 info->var.activate = var->activate;
1383 var->yoffset = info->var.yoffset;
1384 var->xoffset = info->var.xoffset;
1385 fb_set_var(info, var);
1386 ops->var = info->var;
1387 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1388 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1389 if (vc->vc_font.charcount == 256) {
1390 vc->vc_hi_font_mask = 0;
1391 } else {
1392 vc->vc_hi_font_mask = 0x100;
1393 if (vc->vc_can_do_color)
1394 vc->vc_complement_mask <<= 1;
1395 }
1396
1397 if (!*svc->uni_pagedict_loc)
1398 con_set_default_unimap(svc);
1399 if (!*vc->uni_pagedict_loc)
1400 con_copy_unimap(vc, svc);
1401
1402 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1403 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1404 cols /= vc->vc_font.width;
1405 rows /= vc->vc_font.height;
1406 vc_resize(vc, cols, rows);
1407
1408 if (con_is_visible(vc)) {
1409 update_screen(vc);
1410 }
1411 }
1412
ywrap_up(struct vc_data * vc,int count)1413 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1414 {
1415 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1416 struct fbcon_ops *ops = info->fbcon_par;
1417 struct fbcon_display *p = &fb_display[vc->vc_num];
1418
1419 p->yscroll += count;
1420 if (p->yscroll >= p->vrows) /* Deal with wrap */
1421 p->yscroll -= p->vrows;
1422 ops->var.xoffset = 0;
1423 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1424 ops->var.vmode |= FB_VMODE_YWRAP;
1425 ops->update_start(info);
1426 scrollback_max += count;
1427 if (scrollback_max > scrollback_phys_max)
1428 scrollback_max = scrollback_phys_max;
1429 scrollback_current = 0;
1430 }
1431
ywrap_down(struct vc_data * vc,int count)1432 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1433 {
1434 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1435 struct fbcon_ops *ops = info->fbcon_par;
1436 struct fbcon_display *p = &fb_display[vc->vc_num];
1437
1438 p->yscroll -= count;
1439 if (p->yscroll < 0) /* Deal with wrap */
1440 p->yscroll += p->vrows;
1441 ops->var.xoffset = 0;
1442 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1443 ops->var.vmode |= FB_VMODE_YWRAP;
1444 ops->update_start(info);
1445 scrollback_max -= count;
1446 if (scrollback_max < 0)
1447 scrollback_max = 0;
1448 scrollback_current = 0;
1449 }
1450
ypan_up(struct vc_data * vc,int count)1451 static __inline__ void ypan_up(struct vc_data *vc, int count)
1452 {
1453 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1454 struct fbcon_display *p = &fb_display[vc->vc_num];
1455 struct fbcon_ops *ops = info->fbcon_par;
1456
1457 p->yscroll += count;
1458 if (p->yscroll > p->vrows - vc->vc_rows) {
1459 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1460 0, 0, 0, vc->vc_rows, vc->vc_cols);
1461 p->yscroll -= p->vrows - vc->vc_rows;
1462 }
1463
1464 ops->var.xoffset = 0;
1465 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1466 ops->var.vmode &= ~FB_VMODE_YWRAP;
1467 ops->update_start(info);
1468 fbcon_clear_margins(vc, 1);
1469 scrollback_max += count;
1470 if (scrollback_max > scrollback_phys_max)
1471 scrollback_max = scrollback_phys_max;
1472 scrollback_current = 0;
1473 }
1474
ypan_up_redraw(struct vc_data * vc,int t,int count)1475 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1476 {
1477 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1478 struct fbcon_ops *ops = info->fbcon_par;
1479 struct fbcon_display *p = &fb_display[vc->vc_num];
1480
1481 p->yscroll += count;
1482
1483 if (p->yscroll > p->vrows - vc->vc_rows) {
1484 p->yscroll -= p->vrows - vc->vc_rows;
1485 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1486 }
1487
1488 ops->var.xoffset = 0;
1489 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1490 ops->var.vmode &= ~FB_VMODE_YWRAP;
1491 ops->update_start(info);
1492 fbcon_clear_margins(vc, 1);
1493 scrollback_max += count;
1494 if (scrollback_max > scrollback_phys_max)
1495 scrollback_max = scrollback_phys_max;
1496 scrollback_current = 0;
1497 }
1498
ypan_down(struct vc_data * vc,int count)1499 static __inline__ void ypan_down(struct vc_data *vc, int count)
1500 {
1501 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1502 struct fbcon_display *p = &fb_display[vc->vc_num];
1503 struct fbcon_ops *ops = info->fbcon_par;
1504
1505 p->yscroll -= count;
1506 if (p->yscroll < 0) {
1507 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1508 0, vc->vc_rows, vc->vc_cols);
1509 p->yscroll += p->vrows - vc->vc_rows;
1510 }
1511
1512 ops->var.xoffset = 0;
1513 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1514 ops->var.vmode &= ~FB_VMODE_YWRAP;
1515 ops->update_start(info);
1516 fbcon_clear_margins(vc, 1);
1517 scrollback_max -= count;
1518 if (scrollback_max < 0)
1519 scrollback_max = 0;
1520 scrollback_current = 0;
1521 }
1522
ypan_down_redraw(struct vc_data * vc,int t,int count)1523 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1524 {
1525 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1526 struct fbcon_ops *ops = info->fbcon_par;
1527 struct fbcon_display *p = &fb_display[vc->vc_num];
1528
1529 p->yscroll -= count;
1530
1531 if (p->yscroll < 0) {
1532 p->yscroll += p->vrows - vc->vc_rows;
1533 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1534 }
1535
1536 ops->var.xoffset = 0;
1537 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1538 ops->var.vmode &= ~FB_VMODE_YWRAP;
1539 ops->update_start(info);
1540 fbcon_clear_margins(vc, 1);
1541 scrollback_max -= count;
1542 if (scrollback_max < 0)
1543 scrollback_max = 0;
1544 scrollback_current = 0;
1545 }
1546
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1547 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1548 int line, int count, int dy)
1549 {
1550 unsigned short *s = (unsigned short *)
1551 (vc->vc_origin + vc->vc_size_row * line);
1552
1553 while (count--) {
1554 unsigned short *start = s;
1555 unsigned short *le = advance_row(s, 1);
1556 unsigned short c;
1557 int x = 0;
1558 unsigned short attr = 1;
1559
1560 do {
1561 c = scr_readw(s);
1562 if (attr != (c & 0xff00)) {
1563 attr = c & 0xff00;
1564 if (s > start) {
1565 fbcon_putcs(vc, start, s - start,
1566 dy, x);
1567 x += s - start;
1568 start = s;
1569 }
1570 }
1571 console_conditional_schedule();
1572 s++;
1573 } while (s < le);
1574 if (s > start)
1575 fbcon_putcs(vc, start, s - start, dy, x);
1576 console_conditional_schedule();
1577 dy++;
1578 }
1579 }
1580
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1581 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1582 struct fbcon_display *p, int line, int count, int ycount)
1583 {
1584 int offset = ycount * vc->vc_cols;
1585 unsigned short *d = (unsigned short *)
1586 (vc->vc_origin + vc->vc_size_row * line);
1587 unsigned short *s = d + offset;
1588 struct fbcon_ops *ops = info->fbcon_par;
1589
1590 while (count--) {
1591 unsigned short *start = s;
1592 unsigned short *le = advance_row(s, 1);
1593 unsigned short c;
1594 int x = 0;
1595
1596 do {
1597 c = scr_readw(s);
1598
1599 if (c == scr_readw(d)) {
1600 if (s > start) {
1601 ops->bmove(vc, info, line + ycount, x,
1602 line, x, 1, s-start);
1603 x += s - start + 1;
1604 start = s + 1;
1605 } else {
1606 x++;
1607 start++;
1608 }
1609 }
1610
1611 scr_writew(c, d);
1612 console_conditional_schedule();
1613 s++;
1614 d++;
1615 } while (s < le);
1616 if (s > start)
1617 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1618 s-start);
1619 console_conditional_schedule();
1620 if (ycount > 0)
1621 line++;
1622 else {
1623 line--;
1624 /* NOTE: We subtract two lines from these pointers */
1625 s -= vc->vc_size_row;
1626 d -= vc->vc_size_row;
1627 }
1628 }
1629 }
1630
fbcon_redraw(struct vc_data * vc,int line,int count,int offset)1631 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset)
1632 {
1633 unsigned short *d = (unsigned short *)
1634 (vc->vc_origin + vc->vc_size_row * line);
1635 unsigned short *s = d + offset;
1636
1637 while (count--) {
1638 unsigned short *start = s;
1639 unsigned short *le = advance_row(s, 1);
1640 unsigned short c;
1641 int x = 0;
1642 unsigned short attr = 1;
1643
1644 do {
1645 c = scr_readw(s);
1646 if (attr != (c & 0xff00)) {
1647 attr = c & 0xff00;
1648 if (s > start) {
1649 fbcon_putcs(vc, start, s - start,
1650 line, x);
1651 x += s - start;
1652 start = s;
1653 }
1654 }
1655 if (c == scr_readw(d)) {
1656 if (s > start) {
1657 fbcon_putcs(vc, start, s - start,
1658 line, x);
1659 x += s - start + 1;
1660 start = s + 1;
1661 } else {
1662 x++;
1663 start++;
1664 }
1665 }
1666 scr_writew(c, d);
1667 console_conditional_schedule();
1668 s++;
1669 d++;
1670 } while (s < le);
1671 if (s > start)
1672 fbcon_putcs(vc, start, s - start, line, x);
1673 console_conditional_schedule();
1674 if (offset > 0)
1675 line++;
1676 else {
1677 line--;
1678 /* NOTE: We subtract two lines from these pointers */
1679 s -= vc->vc_size_row;
1680 d -= vc->vc_size_row;
1681 }
1682 }
1683 }
1684
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)1685 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1686 int dy, int dx, int height, int width, u_int y_break)
1687 {
1688 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1689 struct fbcon_ops *ops = info->fbcon_par;
1690 u_int b;
1691
1692 if (sy < y_break && sy + height > y_break) {
1693 b = y_break - sy;
1694 if (dy < sy) { /* Avoid trashing self */
1695 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1696 y_break);
1697 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1698 height - b, width, y_break);
1699 } else {
1700 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1701 height - b, width, y_break);
1702 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1703 y_break);
1704 }
1705 return;
1706 }
1707
1708 if (dy < y_break && dy + height > y_break) {
1709 b = y_break - dy;
1710 if (dy < sy) { /* Avoid trashing self */
1711 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1712 y_break);
1713 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1714 height - b, width, y_break);
1715 } else {
1716 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1717 height - b, width, y_break);
1718 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1719 y_break);
1720 }
1721 return;
1722 }
1723 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1724 height, width);
1725 }
1726
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1727 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1728 int height, int width)
1729 {
1730 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1731 struct fbcon_display *p = &fb_display[vc->vc_num];
1732
1733 if (fbcon_is_inactive(vc, info))
1734 return;
1735
1736 if (!width || !height)
1737 return;
1738
1739 /* Split blits that cross physical y_wrap case.
1740 * Pathological case involves 4 blits, better to use recursive
1741 * code rather than unrolled case
1742 *
1743 * Recursive invocations don't need to erase the cursor over and
1744 * over again, so we use fbcon_bmove_rec()
1745 */
1746 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1747 p->vrows - p->yscroll);
1748 }
1749
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1750 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1751 enum con_scroll dir, unsigned int count)
1752 {
1753 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
1754 struct fbcon_display *p = &fb_display[vc->vc_num];
1755 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1756
1757 if (fbcon_is_inactive(vc, info))
1758 return true;
1759
1760 fbcon_cursor(vc, CM_ERASE);
1761
1762 /*
1763 * ++Geert: Only use ywrap/ypan if the console is in text mode
1764 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1765 * whole screen (prevents flicker).
1766 */
1767
1768 switch (dir) {
1769 case SM_UP:
1770 if (count > vc->vc_rows) /* Maximum realistic size */
1771 count = vc->vc_rows;
1772 switch (fb_scrollmode(p)) {
1773 case SCROLL_MOVE:
1774 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1775 count);
1776 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1777 scr_memsetw((unsigned short *) (vc->vc_origin +
1778 vc->vc_size_row *
1779 (b - count)),
1780 vc->vc_video_erase_char,
1781 vc->vc_size_row * count);
1782 return true;
1783
1784 case SCROLL_WRAP_MOVE:
1785 if (b - t - count > 3 * vc->vc_rows >> 2) {
1786 if (t > 0)
1787 fbcon_bmove(vc, 0, 0, count, 0, t,
1788 vc->vc_cols);
1789 ywrap_up(vc, count);
1790 if (vc->vc_rows - b > 0)
1791 fbcon_bmove(vc, b - count, 0, b, 0,
1792 vc->vc_rows - b,
1793 vc->vc_cols);
1794 } else if (info->flags & FBINFO_READS_FAST)
1795 fbcon_bmove(vc, t + count, 0, t, 0,
1796 b - t - count, vc->vc_cols);
1797 else
1798 goto redraw_up;
1799 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1800 break;
1801
1802 case SCROLL_PAN_REDRAW:
1803 if ((p->yscroll + count <=
1804 2 * (p->vrows - vc->vc_rows))
1805 && ((!scroll_partial && (b - t == vc->vc_rows))
1806 || (scroll_partial
1807 && (b - t - count >
1808 3 * vc->vc_rows >> 2)))) {
1809 if (t > 0)
1810 fbcon_redraw_move(vc, p, 0, t, count);
1811 ypan_up_redraw(vc, t, count);
1812 if (vc->vc_rows - b > 0)
1813 fbcon_redraw_move(vc, p, b,
1814 vc->vc_rows - b, b);
1815 } else
1816 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1817 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1818 break;
1819
1820 case SCROLL_PAN_MOVE:
1821 if ((p->yscroll + count <=
1822 2 * (p->vrows - vc->vc_rows))
1823 && ((!scroll_partial && (b - t == vc->vc_rows))
1824 || (scroll_partial
1825 && (b - t - count >
1826 3 * vc->vc_rows >> 2)))) {
1827 if (t > 0)
1828 fbcon_bmove(vc, 0, 0, count, 0, t,
1829 vc->vc_cols);
1830 ypan_up(vc, count);
1831 if (vc->vc_rows - b > 0)
1832 fbcon_bmove(vc, b - count, 0, b, 0,
1833 vc->vc_rows - b,
1834 vc->vc_cols);
1835 } else if (info->flags & FBINFO_READS_FAST)
1836 fbcon_bmove(vc, t + count, 0, t, 0,
1837 b - t - count, vc->vc_cols);
1838 else
1839 goto redraw_up;
1840 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1841 break;
1842
1843 case SCROLL_REDRAW:
1844 redraw_up:
1845 fbcon_redraw(vc, t, b - t - count,
1846 count * vc->vc_cols);
1847 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1848 scr_memsetw((unsigned short *) (vc->vc_origin +
1849 vc->vc_size_row *
1850 (b - count)),
1851 vc->vc_video_erase_char,
1852 vc->vc_size_row * count);
1853 return true;
1854 }
1855 break;
1856
1857 case SM_DOWN:
1858 if (count > vc->vc_rows) /* Maximum realistic size */
1859 count = vc->vc_rows;
1860 switch (fb_scrollmode(p)) {
1861 case SCROLL_MOVE:
1862 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1863 -count);
1864 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1865 scr_memsetw((unsigned short *) (vc->vc_origin +
1866 vc->vc_size_row *
1867 t),
1868 vc->vc_video_erase_char,
1869 vc->vc_size_row * count);
1870 return true;
1871
1872 case SCROLL_WRAP_MOVE:
1873 if (b - t - count > 3 * vc->vc_rows >> 2) {
1874 if (vc->vc_rows - b > 0)
1875 fbcon_bmove(vc, b, 0, b - count, 0,
1876 vc->vc_rows - b,
1877 vc->vc_cols);
1878 ywrap_down(vc, count);
1879 if (t > 0)
1880 fbcon_bmove(vc, count, 0, 0, 0, t,
1881 vc->vc_cols);
1882 } else if (info->flags & FBINFO_READS_FAST)
1883 fbcon_bmove(vc, t, 0, t + count, 0,
1884 b - t - count, vc->vc_cols);
1885 else
1886 goto redraw_down;
1887 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1888 break;
1889
1890 case SCROLL_PAN_MOVE:
1891 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1892 && ((!scroll_partial && (b - t == vc->vc_rows))
1893 || (scroll_partial
1894 && (b - t - count >
1895 3 * vc->vc_rows >> 2)))) {
1896 if (vc->vc_rows - b > 0)
1897 fbcon_bmove(vc, b, 0, b - count, 0,
1898 vc->vc_rows - b,
1899 vc->vc_cols);
1900 ypan_down(vc, count);
1901 if (t > 0)
1902 fbcon_bmove(vc, count, 0, 0, 0, t,
1903 vc->vc_cols);
1904 } else if (info->flags & FBINFO_READS_FAST)
1905 fbcon_bmove(vc, t, 0, t + count, 0,
1906 b - t - count, vc->vc_cols);
1907 else
1908 goto redraw_down;
1909 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1910 break;
1911
1912 case SCROLL_PAN_REDRAW:
1913 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1914 && ((!scroll_partial && (b - t == vc->vc_rows))
1915 || (scroll_partial
1916 && (b - t - count >
1917 3 * vc->vc_rows >> 2)))) {
1918 if (vc->vc_rows - b > 0)
1919 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1920 b - count);
1921 ypan_down_redraw(vc, t, count);
1922 if (t > 0)
1923 fbcon_redraw_move(vc, p, count, t, 0);
1924 } else
1925 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1926 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1927 break;
1928
1929 case SCROLL_REDRAW:
1930 redraw_down:
1931 fbcon_redraw(vc, b - 1, b - t - count,
1932 -count * vc->vc_cols);
1933 __fbcon_clear(vc, t, 0, count, vc->vc_cols);
1934 scr_memsetw((unsigned short *) (vc->vc_origin +
1935 vc->vc_size_row *
1936 t),
1937 vc->vc_video_erase_char,
1938 vc->vc_size_row * count);
1939 return true;
1940 }
1941 }
1942 return false;
1943 }
1944
1945
updatescrollmode_accel(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1946 static void updatescrollmode_accel(struct fbcon_display *p,
1947 struct fb_info *info,
1948 struct vc_data *vc)
1949 {
1950 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1951 struct fbcon_ops *ops = info->fbcon_par;
1952 int cap = info->flags;
1953 u16 t = 0;
1954 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1955 info->fix.xpanstep);
1956 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1957 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1958 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1959 info->var.xres_virtual);
1960 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1961 divides(ypan, vc->vc_font.height) && vyres > yres;
1962 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1963 divides(ywrap, vc->vc_font.height) &&
1964 divides(vc->vc_font.height, vyres) &&
1965 divides(vc->vc_font.height, yres);
1966 int reading_fast = cap & FBINFO_READS_FAST;
1967 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1968 !(cap & FBINFO_HWACCEL_DISABLED);
1969 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1970 !(cap & FBINFO_HWACCEL_DISABLED);
1971
1972 if (good_wrap || good_pan) {
1973 if (reading_fast || fast_copyarea)
1974 p->scrollmode = good_wrap ?
1975 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1976 else
1977 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1978 SCROLL_PAN_REDRAW;
1979 } else {
1980 if (reading_fast || (fast_copyarea && !fast_imageblit))
1981 p->scrollmode = SCROLL_MOVE;
1982 else
1983 p->scrollmode = SCROLL_REDRAW;
1984 }
1985 #endif
1986 }
1987
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1988 static void updatescrollmode(struct fbcon_display *p,
1989 struct fb_info *info,
1990 struct vc_data *vc)
1991 {
1992 struct fbcon_ops *ops = info->fbcon_par;
1993 int fh = vc->vc_font.height;
1994 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1995 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1996 info->var.xres_virtual);
1997
1998 p->vrows = vyres/fh;
1999 if (yres > (fh * (vc->vc_rows + 1)))
2000 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2001 if ((yres % fh) && (vyres % fh < yres % fh))
2002 p->vrows--;
2003
2004 /* update scrollmode in case hardware acceleration is used */
2005 updatescrollmode_accel(p, info, vc);
2006 }
2007
2008 #define PITCH(w) (((w) + 7) >> 3)
2009 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2010
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,unsigned int user)2011 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2012 unsigned int height, unsigned int user)
2013 {
2014 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2015 struct fbcon_ops *ops = info->fbcon_par;
2016 struct fbcon_display *p = &fb_display[vc->vc_num];
2017 struct fb_var_screeninfo var = info->var;
2018 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2019
2020 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2021 int size;
2022 int pitch = PITCH(vc->vc_font.width);
2023
2024 /*
2025 * If user font, ensure that a possible change to user font
2026 * height or width will not allow a font data out-of-bounds access.
2027 * NOTE: must use original charcount in calculation as font
2028 * charcount can change and cannot be used to determine the
2029 * font data allocated size.
2030 */
2031 if (pitch <= 0)
2032 return -EINVAL;
2033 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
2034 if (size > FNTSIZE(vc->vc_font.data))
2035 return -EINVAL;
2036 }
2037
2038 virt_w = FBCON_SWAP(ops->rotate, width, height);
2039 virt_h = FBCON_SWAP(ops->rotate, height, width);
2040 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2041 vc->vc_font.height);
2042 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2043 vc->vc_font.width);
2044 var.xres = virt_w * virt_fw;
2045 var.yres = virt_h * virt_fh;
2046 x_diff = info->var.xres - var.xres;
2047 y_diff = info->var.yres - var.yres;
2048 if (x_diff < 0 || x_diff > virt_fw ||
2049 y_diff < 0 || y_diff > virt_fh) {
2050 const struct fb_videomode *mode;
2051
2052 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2053 mode = fb_find_best_mode(&var, &info->modelist);
2054 if (mode == NULL)
2055 return -EINVAL;
2056 display_to_var(&var, p);
2057 fb_videomode_to_var(&var, mode);
2058
2059 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2060 return -EINVAL;
2061
2062 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2063 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2064 var.activate = FB_ACTIVATE_NOW |
2065 FB_ACTIVATE_FORCE;
2066 fb_set_var(info, &var);
2067 }
2068 var_to_display(p, &info->var, info);
2069 ops->var = info->var;
2070 }
2071 updatescrollmode(p, info, vc);
2072 return 0;
2073 }
2074
fbcon_switch(struct vc_data * vc)2075 static bool fbcon_switch(struct vc_data *vc)
2076 {
2077 struct fb_info *info, *old_info = NULL;
2078 struct fbcon_ops *ops;
2079 struct fbcon_display *p = &fb_display[vc->vc_num];
2080 struct fb_var_screeninfo var;
2081 int i, ret, prev_console;
2082
2083 info = fbcon_info_from_console(vc->vc_num);
2084 ops = info->fbcon_par;
2085
2086 if (logo_shown >= 0) {
2087 struct vc_data *conp2 = vc_cons[logo_shown].d;
2088
2089 if (conp2->vc_top == logo_lines
2090 && conp2->vc_bottom == conp2->vc_rows)
2091 conp2->vc_top = 0;
2092 logo_shown = FBCON_LOGO_CANSHOW;
2093 }
2094
2095 prev_console = ops->currcon;
2096 if (prev_console != -1)
2097 old_info = fbcon_info_from_console(prev_console);
2098 /*
2099 * FIXME: If we have multiple fbdev's loaded, we need to
2100 * update all info->currcon. Perhaps, we can place this
2101 * in a centralized structure, but this might break some
2102 * drivers.
2103 *
2104 * info->currcon = vc->vc_num;
2105 */
2106 fbcon_for_each_registered_fb(i) {
2107 if (fbcon_registered_fb[i]->fbcon_par) {
2108 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par;
2109
2110 o->currcon = vc->vc_num;
2111 }
2112 }
2113 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2114 display_to_var(&var, p);
2115 var.activate = FB_ACTIVATE_NOW;
2116
2117 /*
2118 * make sure we don't unnecessarily trip the memcmp()
2119 * in fb_set_var()
2120 */
2121 info->var.activate = var.activate;
2122 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2123 fb_set_var(info, &var);
2124 ops->var = info->var;
2125
2126 if (old_info != NULL && (old_info != info ||
2127 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2128 if (info->fbops->fb_set_par) {
2129 ret = info->fbops->fb_set_par(info);
2130
2131 if (ret)
2132 printk(KERN_ERR "fbcon_switch: detected "
2133 "unhandled fb_set_par error, "
2134 "error code %d\n", ret);
2135 }
2136
2137 if (old_info != info)
2138 fbcon_del_cursor_work(old_info);
2139 }
2140
2141 if (fbcon_is_inactive(vc, info) ||
2142 ops->blank_state != FB_BLANK_UNBLANK)
2143 fbcon_del_cursor_work(info);
2144 else
2145 fbcon_add_cursor_work(info);
2146
2147 set_blitting_type(vc, info);
2148 ops->cursor_reset = 1;
2149
2150 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2151 ops->rotate = FB_ROTATE_UR;
2152 set_blitting_type(vc, info);
2153 }
2154
2155 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2156 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2157
2158 if (vc->vc_font.charcount > 256)
2159 vc->vc_complement_mask <<= 1;
2160
2161 updatescrollmode(p, info, vc);
2162
2163 switch (fb_scrollmode(p)) {
2164 case SCROLL_WRAP_MOVE:
2165 scrollback_phys_max = p->vrows - vc->vc_rows;
2166 break;
2167 case SCROLL_PAN_MOVE:
2168 case SCROLL_PAN_REDRAW:
2169 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2170 if (scrollback_phys_max < 0)
2171 scrollback_phys_max = 0;
2172 break;
2173 default:
2174 scrollback_phys_max = 0;
2175 break;
2176 }
2177
2178 scrollback_max = 0;
2179 scrollback_current = 0;
2180
2181 if (!fbcon_is_inactive(vc, info)) {
2182 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2183 ops->update_start(info);
2184 }
2185
2186 fbcon_set_palette(vc, color_table);
2187 fbcon_clear_margins(vc, 0);
2188
2189 if (logo_shown == FBCON_LOGO_DRAW) {
2190
2191 logo_shown = fg_console;
2192 fb_show_logo(info, ops->rotate);
2193 update_region(vc,
2194 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2195 vc->vc_size_row * (vc->vc_bottom -
2196 vc->vc_top) / 2);
2197 return false;
2198 }
2199 return true;
2200 }
2201
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2202 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2203 int blank)
2204 {
2205 if (blank) {
2206 unsigned short charmask = vc->vc_hi_font_mask ?
2207 0x1ff : 0xff;
2208 unsigned short oldc;
2209
2210 oldc = vc->vc_video_erase_char;
2211 vc->vc_video_erase_char &= charmask;
2212 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2213 vc->vc_video_erase_char = oldc;
2214 }
2215 }
2216
fbcon_blank(struct vc_data * vc,int blank,int mode_switch)2217 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2218 {
2219 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2220 struct fbcon_ops *ops = info->fbcon_par;
2221
2222 if (mode_switch) {
2223 struct fb_var_screeninfo var = info->var;
2224
2225 ops->graphics = 1;
2226
2227 if (!blank) {
2228 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2229 FB_ACTIVATE_KD_TEXT;
2230 fb_set_var(info, &var);
2231 ops->graphics = 0;
2232 ops->var = info->var;
2233 }
2234 }
2235
2236 if (!fbcon_is_inactive(vc, info)) {
2237 if (ops->blank_state != blank) {
2238 ops->blank_state = blank;
2239 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2240 ops->cursor_flash = (!blank);
2241
2242 if (fb_blank(info, blank))
2243 fbcon_generic_blank(vc, info, blank);
2244 }
2245
2246 if (!blank)
2247 update_screen(vc);
2248 }
2249
2250 if (mode_switch || fbcon_is_inactive(vc, info) ||
2251 ops->blank_state != FB_BLANK_UNBLANK)
2252 fbcon_del_cursor_work(info);
2253 else
2254 fbcon_add_cursor_work(info);
2255
2256 return 0;
2257 }
2258
fbcon_debug_enter(struct vc_data * vc)2259 static int fbcon_debug_enter(struct vc_data *vc)
2260 {
2261 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2262 struct fbcon_ops *ops = info->fbcon_par;
2263
2264 ops->save_graphics = ops->graphics;
2265 ops->graphics = 0;
2266 if (info->fbops->fb_debug_enter)
2267 info->fbops->fb_debug_enter(info);
2268 fbcon_set_palette(vc, color_table);
2269 return 0;
2270 }
2271
fbcon_debug_leave(struct vc_data * vc)2272 static int fbcon_debug_leave(struct vc_data *vc)
2273 {
2274 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2275 struct fbcon_ops *ops = info->fbcon_par;
2276
2277 ops->graphics = ops->save_graphics;
2278 if (info->fbops->fb_debug_leave)
2279 info->fbops->fb_debug_leave(info);
2280 return 0;
2281 }
2282
fbcon_get_font(struct vc_data * vc,struct console_font * font,unsigned int vpitch)2283 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch)
2284 {
2285 u8 *fontdata = vc->vc_font.data;
2286 u8 *data = font->data;
2287 int i, j;
2288
2289 font->width = vc->vc_font.width;
2290 font->height = vc->vc_font.height;
2291 if (font->height > vpitch)
2292 return -ENOSPC;
2293 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2294 if (!font->data)
2295 return 0;
2296
2297 if (font->width <= 8) {
2298 j = vc->vc_font.height;
2299 if (font->charcount * j > FNTSIZE(fontdata))
2300 return -EINVAL;
2301
2302 for (i = 0; i < font->charcount; i++) {
2303 memcpy(data, fontdata, j);
2304 memset(data + j, 0, vpitch - j);
2305 data += vpitch;
2306 fontdata += j;
2307 }
2308 } else if (font->width <= 16) {
2309 j = vc->vc_font.height * 2;
2310 if (font->charcount * j > FNTSIZE(fontdata))
2311 return -EINVAL;
2312
2313 for (i = 0; i < font->charcount; i++) {
2314 memcpy(data, fontdata, j);
2315 memset(data + j, 0, 2*vpitch - j);
2316 data += 2*vpitch;
2317 fontdata += j;
2318 }
2319 } else if (font->width <= 24) {
2320 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2321 return -EINVAL;
2322
2323 for (i = 0; i < font->charcount; i++) {
2324 for (j = 0; j < vc->vc_font.height; j++) {
2325 *data++ = fontdata[0];
2326 *data++ = fontdata[1];
2327 *data++ = fontdata[2];
2328 fontdata += sizeof(u32);
2329 }
2330 memset(data, 0, 3 * (vpitch - j));
2331 data += 3 * (vpitch - j);
2332 }
2333 } else {
2334 j = vc->vc_font.height * 4;
2335 if (font->charcount * j > FNTSIZE(fontdata))
2336 return -EINVAL;
2337
2338 for (i = 0; i < font->charcount; i++) {
2339 memcpy(data, fontdata, j);
2340 memset(data + j, 0, 4 * vpitch - j);
2341 data += 4 * vpitch;
2342 fontdata += j;
2343 }
2344 }
2345 return 0;
2346 }
2347
2348 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2349 static void set_vc_hi_font(struct vc_data *vc, bool set)
2350 {
2351 if (!set) {
2352 vc->vc_hi_font_mask = 0;
2353 if (vc->vc_can_do_color) {
2354 vc->vc_complement_mask >>= 1;
2355 vc->vc_s_complement_mask >>= 1;
2356 }
2357
2358 /* ++Edmund: reorder the attribute bits */
2359 if (vc->vc_can_do_color) {
2360 unsigned short *cp =
2361 (unsigned short *) vc->vc_origin;
2362 int count = vc->vc_screenbuf_size / 2;
2363 unsigned short c;
2364 for (; count > 0; count--, cp++) {
2365 c = scr_readw(cp);
2366 scr_writew(((c & 0xfe00) >> 1) |
2367 (c & 0xff), cp);
2368 }
2369 c = vc->vc_video_erase_char;
2370 vc->vc_video_erase_char =
2371 ((c & 0xfe00) >> 1) | (c & 0xff);
2372 vc->vc_attr >>= 1;
2373 }
2374 } else {
2375 vc->vc_hi_font_mask = 0x100;
2376 if (vc->vc_can_do_color) {
2377 vc->vc_complement_mask <<= 1;
2378 vc->vc_s_complement_mask <<= 1;
2379 }
2380
2381 /* ++Edmund: reorder the attribute bits */
2382 {
2383 unsigned short *cp =
2384 (unsigned short *) vc->vc_origin;
2385 int count = vc->vc_screenbuf_size / 2;
2386 unsigned short c;
2387 for (; count > 0; count--, cp++) {
2388 unsigned short newc;
2389 c = scr_readw(cp);
2390 if (vc->vc_can_do_color)
2391 newc =
2392 ((c & 0xff00) << 1) | (c &
2393 0xff);
2394 else
2395 newc = c & ~0x100;
2396 scr_writew(newc, cp);
2397 }
2398 c = vc->vc_video_erase_char;
2399 if (vc->vc_can_do_color) {
2400 vc->vc_video_erase_char =
2401 ((c & 0xff00) << 1) | (c & 0xff);
2402 vc->vc_attr <<= 1;
2403 } else
2404 vc->vc_video_erase_char = c & ~0x100;
2405 }
2406 }
2407 }
2408
fbcon_do_set_font(struct vc_data * vc,int w,int h,int charcount,const u8 * data,int userfont)2409 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2410 const u8 * data, int userfont)
2411 {
2412 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2413 struct fbcon_ops *ops = info->fbcon_par;
2414 struct fbcon_display *p = &fb_display[vc->vc_num];
2415 int resize, ret, old_userfont, old_width, old_height, old_charcount;
2416 u8 *old_data = vc->vc_font.data;
2417
2418 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2419 vc->vc_font.data = (void *)(p->fontdata = data);
2420 old_userfont = p->userfont;
2421 if ((p->userfont = userfont))
2422 REFCOUNT(data)++;
2423
2424 old_width = vc->vc_font.width;
2425 old_height = vc->vc_font.height;
2426 old_charcount = vc->vc_font.charcount;
2427
2428 vc->vc_font.width = w;
2429 vc->vc_font.height = h;
2430 vc->vc_font.charcount = charcount;
2431 if (vc->vc_hi_font_mask && charcount == 256)
2432 set_vc_hi_font(vc, false);
2433 else if (!vc->vc_hi_font_mask && charcount == 512)
2434 set_vc_hi_font(vc, true);
2435
2436 if (resize) {
2437 int cols, rows;
2438
2439 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2440 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2441 cols /= w;
2442 rows /= h;
2443 ret = vc_resize(vc, cols, rows);
2444 if (ret)
2445 goto err_out;
2446 } else if (con_is_visible(vc)
2447 && vc->vc_mode == KD_TEXT) {
2448 fbcon_clear_margins(vc, 0);
2449 update_screen(vc);
2450 }
2451
2452 if (old_userfont && (--REFCOUNT(old_data) == 0))
2453 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2454 return 0;
2455
2456 err_out:
2457 p->fontdata = old_data;
2458 vc->vc_font.data = old_data;
2459
2460 if (userfont) {
2461 p->userfont = old_userfont;
2462 if (--REFCOUNT(data) == 0)
2463 kfree(data - FONT_EXTRA_WORDS * sizeof(int));
2464 }
2465
2466 vc->vc_font.width = old_width;
2467 vc->vc_font.height = old_height;
2468 vc->vc_font.charcount = old_charcount;
2469
2470 return ret;
2471 }
2472
2473 /*
2474 * User asked to set font; we are guaranteed that charcount does not exceed 512
2475 * but lets not assume that, since charcount of 512 is small for unicode support.
2476 */
2477
fbcon_set_font(struct vc_data * vc,struct console_font * font,unsigned int vpitch,unsigned int flags)2478 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2479 unsigned int vpitch, unsigned int flags)
2480 {
2481 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2482 unsigned charcount = font->charcount;
2483 int w = font->width;
2484 int h = font->height;
2485 int size;
2486 int i, csum;
2487 u8 *new_data, *data = font->data;
2488 int pitch = PITCH(font->width);
2489
2490 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2491 * If not this check should be changed to charcount < 256 */
2492 if (charcount != 256 && charcount != 512)
2493 return -EINVAL;
2494
2495 /* font bigger than screen resolution ? */
2496 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
2497 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
2498 return -EINVAL;
2499
2500 if (font->width > 32 || font->height > 32)
2501 return -EINVAL;
2502
2503 /* Make sure drawing engine can handle the font */
2504 if (!(info->pixmap.blit_x & BIT(font->width - 1)) ||
2505 !(info->pixmap.blit_y & BIT(font->height - 1)))
2506 return -EINVAL;
2507
2508 /* Make sure driver can handle the font length */
2509 if (fbcon_invalid_charcount(info, charcount))
2510 return -EINVAL;
2511
2512 size = CALC_FONTSZ(h, pitch, charcount);
2513
2514 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2515
2516 if (!new_data)
2517 return -ENOMEM;
2518
2519 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2520
2521 new_data += FONT_EXTRA_WORDS * sizeof(int);
2522 FNTSIZE(new_data) = size;
2523 REFCOUNT(new_data) = 0; /* usage counter */
2524 for (i=0; i< charcount; i++) {
2525 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch);
2526 }
2527
2528 /* Since linux has a nice crc32 function use it for counting font
2529 * checksums. */
2530 csum = crc32(0, new_data, size);
2531
2532 FNTSUM(new_data) = csum;
2533 /* Check if the same font is on some other console already */
2534 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2535 struct vc_data *tmp = vc_cons[i].d;
2536
2537 if (fb_display[i].userfont &&
2538 fb_display[i].fontdata &&
2539 FNTSUM(fb_display[i].fontdata) == csum &&
2540 FNTSIZE(fb_display[i].fontdata) == size &&
2541 tmp->vc_font.width == w &&
2542 !memcmp(fb_display[i].fontdata, new_data, size)) {
2543 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2544 new_data = (u8 *)fb_display[i].fontdata;
2545 break;
2546 }
2547 }
2548 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2549 }
2550
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,char * name)2551 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2552 {
2553 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2554 const struct font_desc *f;
2555
2556 if (!name)
2557 f = get_default_font(info->var.xres, info->var.yres,
2558 info->pixmap.blit_x, info->pixmap.blit_y);
2559 else if (!(f = find_font(name)))
2560 return -ENOENT;
2561
2562 font->width = f->width;
2563 font->height = f->height;
2564 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2565 }
2566
2567 static u16 palette_red[16];
2568 static u16 palette_green[16];
2569 static u16 palette_blue[16];
2570
2571 static struct fb_cmap palette_cmap = {
2572 0, 16, palette_red, palette_green, palette_blue, NULL
2573 };
2574
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2575 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2576 {
2577 struct fb_info *info = fbcon_info_from_console(vc->vc_num);
2578 int i, j, k, depth;
2579 u8 val;
2580
2581 if (fbcon_is_inactive(vc, info))
2582 return;
2583
2584 if (!con_is_visible(vc))
2585 return;
2586
2587 depth = fb_get_color_depth(&info->var, &info->fix);
2588 if (depth > 3) {
2589 for (i = j = 0; i < 16; i++) {
2590 k = table[i];
2591 val = vc->vc_palette[j++];
2592 palette_red[k] = (val << 8) | val;
2593 val = vc->vc_palette[j++];
2594 palette_green[k] = (val << 8) | val;
2595 val = vc->vc_palette[j++];
2596 palette_blue[k] = (val << 8) | val;
2597 }
2598 palette_cmap.len = 16;
2599 palette_cmap.start = 0;
2600 /*
2601 * If framebuffer is capable of less than 16 colors,
2602 * use default palette of fbcon.
2603 */
2604 } else
2605 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2606
2607 fb_set_cmap(&palette_cmap, info);
2608 }
2609
fbcon_screen_pos(const struct vc_data * vc,int offset)2610 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2611 {
2612 return (u16 *) (vc->vc_origin + offset);
2613 }
2614
fbcon_getxy(struct vc_data * vc,unsigned long pos,int * px,int * py)2615 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2616 int *px, int *py)
2617 {
2618 unsigned long ret;
2619 int x, y;
2620
2621 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2622 unsigned long offset = (pos - vc->vc_origin) / 2;
2623
2624 x = offset % vc->vc_cols;
2625 y = offset / vc->vc_cols;
2626 ret = pos + (vc->vc_cols - x) * 2;
2627 } else {
2628 /* Should not happen */
2629 x = y = 0;
2630 ret = vc->vc_origin;
2631 }
2632 if (px)
2633 *px = x;
2634 if (py)
2635 *py = y;
2636 return ret;
2637 }
2638
2639 /* As we might be inside of softback, we may work with non-contiguous buffer,
2640 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2641 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2642 {
2643 while (cnt--) {
2644 u16 a = scr_readw(p);
2645 if (!vc->vc_can_do_color)
2646 a ^= 0x0800;
2647 else if (vc->vc_hi_font_mask == 0x100)
2648 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2649 (((a) & 0x0e00) << 4);
2650 else
2651 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2652 (((a) & 0x0700) << 4);
2653 scr_writew(a, p++);
2654 }
2655 }
2656
fbcon_suspended(struct fb_info * info)2657 void fbcon_suspended(struct fb_info *info)
2658 {
2659 struct vc_data *vc = NULL;
2660 struct fbcon_ops *ops = info->fbcon_par;
2661
2662 if (!ops || ops->currcon < 0)
2663 return;
2664 vc = vc_cons[ops->currcon].d;
2665
2666 /* Clear cursor, restore saved data */
2667 fbcon_cursor(vc, CM_ERASE);
2668 }
2669
fbcon_resumed(struct fb_info * info)2670 void fbcon_resumed(struct fb_info *info)
2671 {
2672 struct vc_data *vc;
2673 struct fbcon_ops *ops = info->fbcon_par;
2674
2675 if (!ops || ops->currcon < 0)
2676 return;
2677 vc = vc_cons[ops->currcon].d;
2678
2679 update_screen(vc);
2680 }
2681
fbcon_modechanged(struct fb_info * info)2682 static void fbcon_modechanged(struct fb_info *info)
2683 {
2684 struct fbcon_ops *ops = info->fbcon_par;
2685 struct vc_data *vc;
2686 struct fbcon_display *p;
2687 int rows, cols;
2688
2689 if (!ops || ops->currcon < 0)
2690 return;
2691 vc = vc_cons[ops->currcon].d;
2692 if (vc->vc_mode != KD_TEXT ||
2693 fbcon_info_from_console(ops->currcon) != info)
2694 return;
2695
2696 p = &fb_display[vc->vc_num];
2697 set_blitting_type(vc, info);
2698
2699 if (con_is_visible(vc)) {
2700 var_to_display(p, &info->var, info);
2701 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2702 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2703 cols /= vc->vc_font.width;
2704 rows /= vc->vc_font.height;
2705 vc_resize(vc, cols, rows);
2706 updatescrollmode(p, info, vc);
2707 scrollback_max = 0;
2708 scrollback_current = 0;
2709
2710 if (!fbcon_is_inactive(vc, info)) {
2711 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2712 ops->update_start(info);
2713 }
2714
2715 fbcon_set_palette(vc, color_table);
2716 update_screen(vc);
2717 }
2718 }
2719
fbcon_set_all_vcs(struct fb_info * info)2720 static void fbcon_set_all_vcs(struct fb_info *info)
2721 {
2722 struct fbcon_ops *ops = info->fbcon_par;
2723 struct vc_data *vc;
2724 struct fbcon_display *p;
2725 int i, rows, cols, fg = -1;
2726
2727 if (!ops || ops->currcon < 0)
2728 return;
2729
2730 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2731 vc = vc_cons[i].d;
2732 if (!vc || vc->vc_mode != KD_TEXT ||
2733 fbcon_info_from_console(i) != info)
2734 continue;
2735
2736 if (con_is_visible(vc)) {
2737 fg = i;
2738 continue;
2739 }
2740
2741 p = &fb_display[vc->vc_num];
2742 set_blitting_type(vc, info);
2743 var_to_display(p, &info->var, info);
2744 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2745 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2746 cols /= vc->vc_font.width;
2747 rows /= vc->vc_font.height;
2748 vc_resize(vc, cols, rows);
2749 }
2750
2751 if (fg != -1)
2752 fbcon_modechanged(info);
2753 }
2754
2755
fbcon_update_vcs(struct fb_info * info,bool all)2756 void fbcon_update_vcs(struct fb_info *info, bool all)
2757 {
2758 if (all)
2759 fbcon_set_all_vcs(info);
2760 else
2761 fbcon_modechanged(info);
2762 }
2763 EXPORT_SYMBOL(fbcon_update_vcs);
2764
2765 /* let fbcon check if it supports a new screen resolution */
fbcon_modechange_possible(struct fb_info * info,struct fb_var_screeninfo * var)2766 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
2767 {
2768 struct fbcon_ops *ops = info->fbcon_par;
2769 struct vc_data *vc;
2770 unsigned int i;
2771
2772 WARN_CONSOLE_UNLOCKED();
2773
2774 if (!ops)
2775 return 0;
2776
2777 /* prevent setting a screen size which is smaller than font size */
2778 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2779 vc = vc_cons[i].d;
2780 if (!vc || vc->vc_mode != KD_TEXT ||
2781 fbcon_info_from_console(i) != info)
2782 continue;
2783
2784 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
2785 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
2786 return -EINVAL;
2787 }
2788
2789 return 0;
2790 }
2791 EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
2792
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2793 int fbcon_mode_deleted(struct fb_info *info,
2794 struct fb_videomode *mode)
2795 {
2796 struct fb_info *fb_info;
2797 struct fbcon_display *p;
2798 int i, j, found = 0;
2799
2800 /* before deletion, ensure that mode is not in use */
2801 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2802 j = con2fb_map[i];
2803 if (j == -1)
2804 continue;
2805 fb_info = fbcon_registered_fb[j];
2806 if (fb_info != info)
2807 continue;
2808 p = &fb_display[i];
2809 if (!p || !p->mode)
2810 continue;
2811 if (fb_mode_is_equal(p->mode, mode)) {
2812 found = 1;
2813 break;
2814 }
2815 }
2816 return found;
2817 }
2818
2819 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2820 static void fbcon_unbind(void)
2821 {
2822 int ret;
2823
2824 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2825 fbcon_is_default);
2826
2827 if (!ret)
2828 fbcon_has_console_bind = 0;
2829 }
2830 #else
fbcon_unbind(void)2831 static inline void fbcon_unbind(void) {}
2832 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2833
fbcon_fb_unbind(struct fb_info * info)2834 void fbcon_fb_unbind(struct fb_info *info)
2835 {
2836 int i, new_idx = -1;
2837 int idx = info->node;
2838
2839 console_lock();
2840
2841 if (!fbcon_has_console_bind) {
2842 console_unlock();
2843 return;
2844 }
2845
2846 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2847 if (con2fb_map[i] != idx &&
2848 con2fb_map[i] != -1) {
2849 new_idx = con2fb_map[i];
2850 break;
2851 }
2852 }
2853
2854 if (new_idx != -1) {
2855 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2856 if (con2fb_map[i] == idx)
2857 set_con2fb_map(i, new_idx, 0);
2858 }
2859 } else {
2860 struct fb_info *info = fbcon_registered_fb[idx];
2861
2862 /* This is sort of like set_con2fb_map, except it maps
2863 * the consoles to no device and then releases the
2864 * oldinfo to free memory and cancel the cursor blink
2865 * timer. I can imagine this just becoming part of
2866 * set_con2fb_map where new_idx is -1
2867 */
2868 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2869 if (con2fb_map[i] == idx) {
2870 con2fb_map[i] = -1;
2871 if (!search_fb_in_map(idx)) {
2872 con2fb_release_oldinfo(vc_cons[i].d,
2873 info, NULL);
2874 }
2875 }
2876 }
2877 fbcon_unbind();
2878 }
2879
2880 console_unlock();
2881 }
2882
fbcon_fb_unregistered(struct fb_info * info)2883 void fbcon_fb_unregistered(struct fb_info *info)
2884 {
2885 int i, idx;
2886
2887 console_lock();
2888
2889 fbcon_registered_fb[info->node] = NULL;
2890 fbcon_num_registered_fb--;
2891
2892 if (deferred_takeover) {
2893 console_unlock();
2894 return;
2895 }
2896
2897 idx = info->node;
2898 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2899 if (con2fb_map[i] == idx)
2900 con2fb_map[i] = -1;
2901 }
2902
2903 if (idx == info_idx) {
2904 info_idx = -1;
2905
2906 fbcon_for_each_registered_fb(i) {
2907 info_idx = i;
2908 break;
2909 }
2910 }
2911
2912 if (info_idx != -1) {
2913 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2914 if (con2fb_map[i] == -1)
2915 con2fb_map[i] = info_idx;
2916 }
2917 }
2918
2919 if (primary_device == idx)
2920 primary_device = -1;
2921
2922 if (!fbcon_num_registered_fb)
2923 do_unregister_con_driver(&fb_con);
2924 console_unlock();
2925 }
2926
fbcon_remap_all(struct fb_info * info)2927 void fbcon_remap_all(struct fb_info *info)
2928 {
2929 int i, idx = info->node;
2930
2931 console_lock();
2932 if (deferred_takeover) {
2933 for (i = first_fb_vc; i <= last_fb_vc; i++)
2934 con2fb_map_boot[i] = idx;
2935 fbcon_map_override();
2936 console_unlock();
2937 return;
2938 }
2939
2940 for (i = first_fb_vc; i <= last_fb_vc; i++)
2941 set_con2fb_map(i, idx, 0);
2942
2943 if (con_is_bound(&fb_con)) {
2944 printk(KERN_INFO "fbcon: Remapping primary device, "
2945 "fb%i, to tty %i-%i\n", idx,
2946 first_fb_vc + 1, last_fb_vc + 1);
2947 info_idx = idx;
2948 }
2949 console_unlock();
2950 }
2951
2952 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2953 static void fbcon_select_primary(struct fb_info *info)
2954 {
2955 if (!map_override && primary_device == -1 &&
2956 fb_is_primary_device(info)) {
2957 int i;
2958
2959 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2960 info->fix.id, info->node);
2961 primary_device = info->node;
2962
2963 for (i = first_fb_vc; i <= last_fb_vc; i++)
2964 con2fb_map_boot[i] = primary_device;
2965
2966 if (con_is_bound(&fb_con)) {
2967 printk(KERN_INFO "fbcon: Remapping primary device, "
2968 "fb%i, to tty %i-%i\n", info->node,
2969 first_fb_vc + 1, last_fb_vc + 1);
2970 info_idx = primary_device;
2971 }
2972 }
2973
2974 }
2975 #else
fbcon_select_primary(struct fb_info * info)2976 static inline void fbcon_select_primary(struct fb_info *info)
2977 {
2978 return;
2979 }
2980 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2981
2982 static bool lockless_register_fb;
2983 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
2984 MODULE_PARM_DESC(lockless_register_fb,
2985 "Lockless framebuffer registration for debugging [default=off]");
2986
2987 /* called with console_lock held */
do_fb_registered(struct fb_info * info)2988 static int do_fb_registered(struct fb_info *info)
2989 {
2990 int ret = 0, i, idx;
2991
2992 WARN_CONSOLE_UNLOCKED();
2993
2994 fbcon_registered_fb[info->node] = info;
2995 fbcon_num_registered_fb++;
2996
2997 idx = info->node;
2998 fbcon_select_primary(info);
2999
3000 if (deferred_takeover) {
3001 pr_info("fbcon: Deferring console take-over\n");
3002 return 0;
3003 }
3004
3005 if (info_idx == -1) {
3006 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3007 if (con2fb_map_boot[i] == idx) {
3008 info_idx = idx;
3009 break;
3010 }
3011 }
3012
3013 if (info_idx != -1)
3014 ret = do_fbcon_takeover(1);
3015 } else {
3016 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3017 if (con2fb_map_boot[i] == idx)
3018 set_con2fb_map(i, idx, 0);
3019 }
3020 }
3021
3022 return ret;
3023 }
3024
fbcon_fb_registered(struct fb_info * info)3025 int fbcon_fb_registered(struct fb_info *info)
3026 {
3027 int ret;
3028
3029 if (!lockless_register_fb)
3030 console_lock();
3031 else
3032 atomic_inc(&ignore_console_lock_warning);
3033
3034 ret = do_fb_registered(info);
3035
3036 if (!lockless_register_fb)
3037 console_unlock();
3038 else
3039 atomic_dec(&ignore_console_lock_warning);
3040
3041 return ret;
3042 }
3043
fbcon_fb_blanked(struct fb_info * info,int blank)3044 void fbcon_fb_blanked(struct fb_info *info, int blank)
3045 {
3046 struct fbcon_ops *ops = info->fbcon_par;
3047 struct vc_data *vc;
3048
3049 if (!ops || ops->currcon < 0)
3050 return;
3051
3052 vc = vc_cons[ops->currcon].d;
3053 if (vc->vc_mode != KD_TEXT ||
3054 fbcon_info_from_console(ops->currcon) != info)
3055 return;
3056
3057 if (con_is_visible(vc)) {
3058 if (blank)
3059 do_blank_screen(0);
3060 else
3061 do_unblank_screen(0);
3062 }
3063 ops->blank_state = blank;
3064 }
3065
fbcon_new_modelist(struct fb_info * info)3066 void fbcon_new_modelist(struct fb_info *info)
3067 {
3068 int i;
3069 struct vc_data *vc;
3070 struct fb_var_screeninfo var;
3071 const struct fb_videomode *mode;
3072
3073 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3074 if (fbcon_info_from_console(i) != info)
3075 continue;
3076 if (!fb_display[i].mode)
3077 continue;
3078 vc = vc_cons[i].d;
3079 display_to_var(&var, &fb_display[i]);
3080 mode = fb_find_nearest_mode(fb_display[i].mode,
3081 &info->modelist);
3082 fb_videomode_to_var(&var, mode);
3083 fbcon_set_disp(info, &var, vc->vc_num);
3084 }
3085 }
3086
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)3087 void fbcon_get_requirement(struct fb_info *info,
3088 struct fb_blit_caps *caps)
3089 {
3090 struct vc_data *vc;
3091
3092 if (caps->flags) {
3093 int i, charcnt;
3094
3095 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3096 vc = vc_cons[i].d;
3097 if (vc && vc->vc_mode == KD_TEXT &&
3098 info->node == con2fb_map[i]) {
3099 caps->x |= 1 << (vc->vc_font.width - 1);
3100 caps->y |= 1 << (vc->vc_font.height - 1);
3101 charcnt = vc->vc_font.charcount;
3102 if (caps->len < charcnt)
3103 caps->len = charcnt;
3104 }
3105 }
3106 } else {
3107 vc = vc_cons[fg_console].d;
3108
3109 if (vc && vc->vc_mode == KD_TEXT &&
3110 info->node == con2fb_map[fg_console]) {
3111 caps->x = 1 << (vc->vc_font.width - 1);
3112 caps->y = 1 << (vc->vc_font.height - 1);
3113 caps->len = vc->vc_font.charcount;
3114 }
3115 }
3116 }
3117
fbcon_set_con2fb_map_ioctl(void __user * argp)3118 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3119 {
3120 struct fb_con2fbmap con2fb;
3121 int ret;
3122
3123 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3124 return -EFAULT;
3125 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3126 return -EINVAL;
3127 if (con2fb.framebuffer >= FB_MAX)
3128 return -EINVAL;
3129 if (!fbcon_registered_fb[con2fb.framebuffer])
3130 request_module("fb%d", con2fb.framebuffer);
3131 if (!fbcon_registered_fb[con2fb.framebuffer]) {
3132 return -EINVAL;
3133 }
3134
3135 console_lock();
3136 ret = set_con2fb_map(con2fb.console - 1,
3137 con2fb.framebuffer, 1);
3138 console_unlock();
3139
3140 return ret;
3141 }
3142
fbcon_get_con2fb_map_ioctl(void __user * argp)3143 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3144 {
3145 struct fb_con2fbmap con2fb;
3146
3147 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3148 return -EFAULT;
3149 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3150 return -EINVAL;
3151
3152 console_lock();
3153 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3154 console_unlock();
3155
3156 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3157 }
3158
3159 /*
3160 * The console `switch' structure for the frame buffer based console
3161 */
3162
3163 static const struct consw fb_con = {
3164 .owner = THIS_MODULE,
3165 .con_startup = fbcon_startup,
3166 .con_init = fbcon_init,
3167 .con_deinit = fbcon_deinit,
3168 .con_clear = fbcon_clear,
3169 .con_putc = fbcon_putc,
3170 .con_putcs = fbcon_putcs,
3171 .con_cursor = fbcon_cursor,
3172 .con_scroll = fbcon_scroll,
3173 .con_switch = fbcon_switch,
3174 .con_blank = fbcon_blank,
3175 .con_font_set = fbcon_set_font,
3176 .con_font_get = fbcon_get_font,
3177 .con_font_default = fbcon_set_def_font,
3178 .con_set_palette = fbcon_set_palette,
3179 .con_invert_region = fbcon_invert_region,
3180 .con_screen_pos = fbcon_screen_pos,
3181 .con_getxy = fbcon_getxy,
3182 .con_resize = fbcon_resize,
3183 .con_debug_enter = fbcon_debug_enter,
3184 .con_debug_leave = fbcon_debug_leave,
3185 };
3186
store_rotate(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3187 static ssize_t store_rotate(struct device *device,
3188 struct device_attribute *attr, const char *buf,
3189 size_t count)
3190 {
3191 struct fb_info *info;
3192 int rotate, idx;
3193 char **last = NULL;
3194
3195 console_lock();
3196 idx = con2fb_map[fg_console];
3197
3198 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3199 goto err;
3200
3201 info = fbcon_registered_fb[idx];
3202 rotate = simple_strtoul(buf, last, 0);
3203 fbcon_rotate(info, rotate);
3204 err:
3205 console_unlock();
3206 return count;
3207 }
3208
store_rotate_all(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3209 static ssize_t store_rotate_all(struct device *device,
3210 struct device_attribute *attr,const char *buf,
3211 size_t count)
3212 {
3213 struct fb_info *info;
3214 int rotate, idx;
3215 char **last = NULL;
3216
3217 console_lock();
3218 idx = con2fb_map[fg_console];
3219
3220 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3221 goto err;
3222
3223 info = fbcon_registered_fb[idx];
3224 rotate = simple_strtoul(buf, last, 0);
3225 fbcon_rotate_all(info, rotate);
3226 err:
3227 console_unlock();
3228 return count;
3229 }
3230
show_rotate(struct device * device,struct device_attribute * attr,char * buf)3231 static ssize_t show_rotate(struct device *device,
3232 struct device_attribute *attr,char *buf)
3233 {
3234 struct fb_info *info;
3235 int rotate = 0, idx;
3236
3237 console_lock();
3238 idx = con2fb_map[fg_console];
3239
3240 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3241 goto err;
3242
3243 info = fbcon_registered_fb[idx];
3244 rotate = fbcon_get_rotate(info);
3245 err:
3246 console_unlock();
3247 return sysfs_emit(buf, "%d\n", rotate);
3248 }
3249
show_cursor_blink(struct device * device,struct device_attribute * attr,char * buf)3250 static ssize_t show_cursor_blink(struct device *device,
3251 struct device_attribute *attr, char *buf)
3252 {
3253 struct fb_info *info;
3254 struct fbcon_ops *ops;
3255 int idx, blink = -1;
3256
3257 console_lock();
3258 idx = con2fb_map[fg_console];
3259
3260 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3261 goto err;
3262
3263 info = fbcon_registered_fb[idx];
3264 ops = info->fbcon_par;
3265
3266 if (!ops)
3267 goto err;
3268
3269 blink = delayed_work_pending(&ops->cursor_work);
3270 err:
3271 console_unlock();
3272 return sysfs_emit(buf, "%d\n", blink);
3273 }
3274
store_cursor_blink(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3275 static ssize_t store_cursor_blink(struct device *device,
3276 struct device_attribute *attr,
3277 const char *buf, size_t count)
3278 {
3279 struct fb_info *info;
3280 int blink, idx;
3281 char **last = NULL;
3282
3283 console_lock();
3284 idx = con2fb_map[fg_console];
3285
3286 if (idx == -1 || fbcon_registered_fb[idx] == NULL)
3287 goto err;
3288
3289 info = fbcon_registered_fb[idx];
3290
3291 if (!info->fbcon_par)
3292 goto err;
3293
3294 blink = simple_strtoul(buf, last, 0);
3295
3296 if (blink) {
3297 fbcon_cursor_noblink = 0;
3298 fbcon_add_cursor_work(info);
3299 } else {
3300 fbcon_cursor_noblink = 1;
3301 fbcon_del_cursor_work(info);
3302 }
3303
3304 err:
3305 console_unlock();
3306 return count;
3307 }
3308
3309 static struct device_attribute device_attrs[] = {
3310 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3311 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3312 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3313 store_cursor_blink),
3314 };
3315
fbcon_init_device(void)3316 static int fbcon_init_device(void)
3317 {
3318 int i, error = 0;
3319
3320 fbcon_has_sysfs = 1;
3321
3322 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3323 error = device_create_file(fbcon_device, &device_attrs[i]);
3324
3325 if (error)
3326 break;
3327 }
3328
3329 if (error) {
3330 while (--i >= 0)
3331 device_remove_file(fbcon_device, &device_attrs[i]);
3332
3333 fbcon_has_sysfs = 0;
3334 }
3335
3336 return 0;
3337 }
3338
3339 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3340 static void fbcon_register_existing_fbs(struct work_struct *work)
3341 {
3342 int i;
3343
3344 console_lock();
3345
3346 deferred_takeover = false;
3347 logo_shown = FBCON_LOGO_DONTSHOW;
3348
3349 fbcon_for_each_registered_fb(i)
3350 do_fb_registered(fbcon_registered_fb[i]);
3351
3352 console_unlock();
3353 }
3354
3355 static struct notifier_block fbcon_output_nb;
3356 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3357
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3358 static int fbcon_output_notifier(struct notifier_block *nb,
3359 unsigned long action, void *data)
3360 {
3361 WARN_CONSOLE_UNLOCKED();
3362
3363 pr_info("fbcon: Taking over console\n");
3364
3365 dummycon_unregister_output_notifier(&fbcon_output_nb);
3366
3367 /* We may get called in atomic context */
3368 schedule_work(&fbcon_deferred_takeover_work);
3369
3370 return NOTIFY_OK;
3371 }
3372 #endif
3373
fbcon_start(void)3374 static void fbcon_start(void)
3375 {
3376 WARN_CONSOLE_UNLOCKED();
3377
3378 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3379 if (conswitchp != &dummy_con)
3380 deferred_takeover = false;
3381
3382 if (deferred_takeover) {
3383 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3384 dummycon_register_output_notifier(&fbcon_output_nb);
3385 return;
3386 }
3387 #endif
3388 }
3389
fb_console_init(void)3390 void __init fb_console_init(void)
3391 {
3392 int i;
3393
3394 console_lock();
3395 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3396 "fbcon");
3397
3398 if (IS_ERR(fbcon_device)) {
3399 printk(KERN_WARNING "Unable to create device "
3400 "for fbcon; errno = %ld\n",
3401 PTR_ERR(fbcon_device));
3402 fbcon_device = NULL;
3403 } else
3404 fbcon_init_device();
3405
3406 for (i = 0; i < MAX_NR_CONSOLES; i++)
3407 con2fb_map[i] = -1;
3408
3409 fbcon_start();
3410 console_unlock();
3411 }
3412
3413 #ifdef MODULE
3414
fbcon_deinit_device(void)3415 static void __exit fbcon_deinit_device(void)
3416 {
3417 int i;
3418
3419 if (fbcon_has_sysfs) {
3420 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3421 device_remove_file(fbcon_device, &device_attrs[i]);
3422
3423 fbcon_has_sysfs = 0;
3424 }
3425 }
3426
fb_console_exit(void)3427 void __exit fb_console_exit(void)
3428 {
3429 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3430 console_lock();
3431 if (deferred_takeover)
3432 dummycon_unregister_output_notifier(&fbcon_output_nb);
3433 console_unlock();
3434
3435 cancel_work_sync(&fbcon_deferred_takeover_work);
3436 #endif
3437
3438 console_lock();
3439 fbcon_deinit_device();
3440 device_destroy(fb_class, MKDEV(0, 0));
3441
3442 do_unregister_con_driver(&fb_con);
3443 console_unlock();
3444 }
3445 #endif
3446