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