1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #include <linux/module.h>
60 #include <linux/types.h>
61 #include <linux/fs.h>
62 #include <linux/kernel.h>
63 #include <linux/delay.h> /* MSch: for IRQ probe */
64 #include <linux/console.h>
65 #include <linux/string.h>
66 #include <linux/kd.h>
67 #include <linux/slab.h>
68 #include <linux/fb.h>
69 #include <linux/fbcon.h>
70 #include <linux/vt_kern.h>
71 #include <linux/selection.h>
72 #include <linux/font.h>
73 #include <linux/smp.h>
74 #include <linux/init.h>
75 #include <linux/interrupt.h>
76 #include <linux/crc32.h> /* For counting font checksums */
77 #include <linux/uaccess.h>
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80
81 #include "fbcon.h"
82
83 /*
84 * FIXME: Locking
85 *
86 * - fbcon state itself is protected by the console_lock, and the code does a
87 * pretty good job at making sure that lock is held everywhere it's needed.
88 *
89 * - access to the registered_fb array is entirely unprotected. This should use
90 * proper object lifetime handling, i.e. get/put_fb_info. This also means
91 * switching from indices to proper pointers for fb_info everywhere.
92 *
93 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
94 * means concurrent access to the same fbdev from both fbcon and userspace
95 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
96 * of fb_lock/unlock protected sections, since otherwise we'll recurse and
97 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
98 * fbmem.c cannot use locking asserts, and there's lots of callers which get
99 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
100 */
101
102 enum {
103 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
104 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
105 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
106 };
107
108 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
109
110 static signed char con2fb_map[MAX_NR_CONSOLES];
111 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
112
113 static int logo_lines;
114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116 static int logo_shown = FBCON_LOGO_CANSHOW;
117 /* console mappings */
118 static unsigned int first_fb_vc;
119 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
120 static int fbcon_is_default = 1;
121 static int primary_device = -1;
122 static int fbcon_has_console_bind;
123
124 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
125 static int map_override;
126
fbcon_map_override(void)127 static inline void fbcon_map_override(void)
128 {
129 map_override = 1;
130 }
131 #else
fbcon_map_override(void)132 static inline void fbcon_map_override(void)
133 {
134 }
135 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
136
137 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
138 static bool deferred_takeover = true;
139 #else
140 #define deferred_takeover false
141 #endif
142
143 /* font data */
144 static char fontname[40];
145
146 /* current fb_info */
147 static int info_idx = -1;
148
149 /* console rotation */
150 static int initial_rotation = -1;
151 static int fbcon_has_sysfs;
152 static int margin_color;
153
154 static const struct consw fb_con;
155
156 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
157
158 static int fbcon_cursor_noblink;
159
160 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
161
162 /*
163 * Interface used by the world
164 */
165
166 static const char *fbcon_startup(void);
167 static void fbcon_init(struct vc_data *vc, int init);
168 static void fbcon_deinit(struct vc_data *vc);
169 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
170 int width);
171 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
172 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
173 int count, int ypos, int xpos);
174 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
175 static void fbcon_cursor(struct vc_data *vc, int mode);
176 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
177 int height, int width);
178 static int fbcon_switch(struct vc_data *vc);
179 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
180 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
181
182 /*
183 * Internal routines
184 */
185 static __inline__ void ywrap_up(struct vc_data *vc, int count);
186 static __inline__ void ywrap_down(struct vc_data *vc, int count);
187 static __inline__ void ypan_up(struct vc_data *vc, int count);
188 static __inline__ void ypan_down(struct vc_data *vc, int count);
189 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
190 int dy, int dx, int height, int width, u_int y_break);
191 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 int unit);
193 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
194 int line, int count, int dy);
195 static void fbcon_modechanged(struct fb_info *info);
196 static void fbcon_set_all_vcs(struct fb_info *info);
197 static void fbcon_start(void);
198 static void fbcon_exit(void);
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_ops *ops = info->fbcon_par;
205
206 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
207 ops->p->con_rotate < 4)
208 ops->rotate = ops->p->con_rotate;
209 else
210 ops->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_ops *ops= info->fbcon_par;
216 struct fb_info *fb_info;
217
218 if (!ops || ops->currcon == -1)
219 return;
220
221 fb_info = registered_fb[con2fb_map[ops->currcon]];
222
223 if (info == fb_info) {
224 struct fbcon_display *p = &fb_display[ops->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_ops *ops = info->fbcon_par;
238 struct vc_data *vc;
239 struct fbcon_display *p;
240 int i;
241
242 if (!ops || ops->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 registered_fb[con2fb_map[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_ops *ops = info->fbcon_par;
261
262 ops->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_get_rotate(struct fb_info * info)276 static int fbcon_get_rotate(struct fb_info *info)
277 {
278 struct fbcon_ops *ops = info->fbcon_par;
279
280 return (ops) ? ops->rotate : 0;
281 }
282
fbcon_is_inactive(struct vc_data * vc,struct fb_info * info)283 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
284 {
285 struct fbcon_ops *ops = info->fbcon_par;
286
287 return (info->state != FBINFO_STATE_RUNNING ||
288 vc->vc_mode != KD_TEXT || ops->graphics);
289 }
290
get_color(struct vc_data * vc,struct fb_info * info,u16 c,int is_fg)291 static int get_color(struct vc_data *vc, struct fb_info *info,
292 u16 c, int is_fg)
293 {
294 int depth = fb_get_color_depth(&info->var, &info->fix);
295 int color = 0;
296
297 if (console_blanked) {
298 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
299
300 c = vc->vc_video_erase_char & charmask;
301 }
302
303 if (depth != 1)
304 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
305 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
306
307 switch (depth) {
308 case 1:
309 {
310 int col = mono_col(info);
311 /* 0 or 1 */
312 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
313 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
314
315 if (console_blanked)
316 fg = bg;
317
318 color = (is_fg) ? fg : bg;
319 break;
320 }
321 case 2:
322 /*
323 * Scale down 16-colors to 4 colors. Default 4-color palette
324 * is grayscale. However, simply dividing the values by 4
325 * will not work, as colors 1, 2 and 3 will be scaled-down
326 * to zero rendering them invisible. So empirically convert
327 * colors to a sane 4-level grayscale.
328 */
329 switch (color) {
330 case 0:
331 color = 0; /* black */
332 break;
333 case 1 ... 6:
334 color = 2; /* white */
335 break;
336 case 7 ... 8:
337 color = 1; /* gray */
338 break;
339 default:
340 color = 3; /* intense white */
341 break;
342 }
343 break;
344 case 3:
345 /*
346 * Last 8 entries of default 16-color palette is a more intense
347 * version of the first 8 (i.e., same chrominance, different
348 * luminance).
349 */
350 color &= 7;
351 break;
352 }
353
354
355 return color;
356 }
357
fb_flashcursor(struct work_struct * work)358 static void fb_flashcursor(struct work_struct *work)
359 {
360 struct fb_info *info = container_of(work, struct fb_info, queue);
361 struct fbcon_ops *ops = info->fbcon_par;
362 struct vc_data *vc = NULL;
363 int c;
364 int mode;
365 int ret;
366
367 /* FIXME: we should sort out the unbind locking instead */
368 /* instead we just fail to flash the cursor if we can't get
369 * the lock instead of blocking fbcon deinit */
370 ret = console_trylock();
371 if (ret == 0)
372 return;
373
374 if (ops && ops->currcon != -1)
375 vc = vc_cons[ops->currcon].d;
376
377 if (!vc || !con_is_visible(vc) ||
378 registered_fb[con2fb_map[vc->vc_num]] != info ||
379 vc->vc_deccm != 1) {
380 console_unlock();
381 return;
382 }
383
384 c = scr_readw((u16 *) vc->vc_pos);
385 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
386 CM_ERASE : CM_DRAW;
387 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
388 get_color(vc, info, c, 0));
389 console_unlock();
390 }
391
cursor_timer_handler(struct timer_list * t)392 static void cursor_timer_handler(struct timer_list *t)
393 {
394 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
395 struct fb_info *info = ops->info;
396
397 queue_work(system_power_efficient_wq, &info->queue);
398 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
399 }
400
fbcon_add_cursor_timer(struct fb_info * info)401 static void fbcon_add_cursor_timer(struct fb_info *info)
402 {
403 struct fbcon_ops *ops = info->fbcon_par;
404
405 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
406 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
407 !fbcon_cursor_noblink) {
408 if (!info->queue.func)
409 INIT_WORK(&info->queue, fb_flashcursor);
410
411 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
412 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
413 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
414 }
415 }
416
fbcon_del_cursor_timer(struct fb_info * info)417 static void fbcon_del_cursor_timer(struct fb_info *info)
418 {
419 struct fbcon_ops *ops = info->fbcon_par;
420
421 if (info->queue.func == fb_flashcursor &&
422 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
423 del_timer_sync(&ops->cursor_timer);
424 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
425 }
426 }
427
428 #ifndef MODULE
fb_console_setup(char * this_opt)429 static int __init fb_console_setup(char *this_opt)
430 {
431 char *options;
432 int i, j;
433
434 if (!this_opt || !*this_opt)
435 return 1;
436
437 while ((options = strsep(&this_opt, ",")) != NULL) {
438 if (!strncmp(options, "font:", 5)) {
439 strlcpy(fontname, options + 5, sizeof(fontname));
440 continue;
441 }
442
443 if (!strncmp(options, "scrollback:", 11)) {
444 pr_warn("Ignoring scrollback size option\n");
445 continue;
446 }
447
448 if (!strncmp(options, "map:", 4)) {
449 options += 4;
450 if (*options) {
451 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
452 if (!options[j])
453 j = 0;
454 con2fb_map_boot[i] =
455 (options[j++]-'0') % FB_MAX;
456 }
457
458 fbcon_map_override();
459 }
460 continue;
461 }
462
463 if (!strncmp(options, "vc:", 3)) {
464 options += 3;
465 if (*options)
466 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
467 if (first_fb_vc >= MAX_NR_CONSOLES)
468 first_fb_vc = 0;
469 if (*options++ == '-')
470 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
471 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
472 last_fb_vc = MAX_NR_CONSOLES - 1;
473 fbcon_is_default = 0;
474 continue;
475 }
476
477 if (!strncmp(options, "rotate:", 7)) {
478 options += 7;
479 if (*options)
480 initial_rotation = simple_strtoul(options, &options, 0);
481 if (initial_rotation > 3)
482 initial_rotation = 0;
483 continue;
484 }
485
486 if (!strncmp(options, "margin:", 7)) {
487 options += 7;
488 if (*options)
489 margin_color = simple_strtoul(options, &options, 0);
490 continue;
491 }
492 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
493 if (!strcmp(options, "nodefer")) {
494 deferred_takeover = false;
495 continue;
496 }
497 #endif
498
499 if (!strncmp(options, "logo-pos:", 9)) {
500 options += 9;
501 if (!strcmp(options, "center"))
502 fb_center_logo = true;
503 continue;
504 }
505
506 if (!strncmp(options, "logo-count:", 11)) {
507 options += 11;
508 if (*options)
509 fb_logo_count = simple_strtol(options, &options, 0);
510 continue;
511 }
512 }
513 return 1;
514 }
515
516 __setup("fbcon=", fb_console_setup);
517 #endif
518
search_fb_in_map(int idx)519 static int search_fb_in_map(int idx)
520 {
521 int i, retval = 0;
522
523 for (i = first_fb_vc; i <= last_fb_vc; i++) {
524 if (con2fb_map[i] == idx)
525 retval = 1;
526 }
527 return retval;
528 }
529
search_for_mapped_con(void)530 static int search_for_mapped_con(void)
531 {
532 int i, retval = 0;
533
534 for (i = first_fb_vc; i <= last_fb_vc; i++) {
535 if (con2fb_map[i] != -1)
536 retval = 1;
537 }
538 return retval;
539 }
540
do_fbcon_takeover(int show_logo)541 static int do_fbcon_takeover(int show_logo)
542 {
543 int err, i;
544
545 if (!num_registered_fb)
546 return -ENODEV;
547
548 if (!show_logo)
549 logo_shown = FBCON_LOGO_DONTSHOW;
550
551 for (i = first_fb_vc; i <= last_fb_vc; i++)
552 con2fb_map[i] = info_idx;
553
554 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
555 fbcon_is_default);
556
557 if (err) {
558 for (i = first_fb_vc; i <= last_fb_vc; i++)
559 con2fb_map[i] = -1;
560 info_idx = -1;
561 } else {
562 fbcon_has_console_bind = 1;
563 }
564
565 return err;
566 }
567
568 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)569 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
570 int cols, int rows, int new_cols, int new_rows)
571 {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 }
574 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
576 int cols, int rows, int new_cols, int new_rows)
577 {
578 /* Need to make room for the logo */
579 struct fbcon_ops *ops = info->fbcon_par;
580 int cnt, erase = vc->vc_video_erase_char, step;
581 unsigned short *save = NULL, *r, *q;
582 int logo_height;
583
584 if (info->fbops->owner) {
585 logo_shown = FBCON_LOGO_DONTSHOW;
586 return;
587 }
588
589 /*
590 * remove underline attribute from erase character
591 * if black and white framebuffer.
592 */
593 if (fb_get_color_depth(&info->var, &info->fix) == 1)
594 erase &= ~0x400;
595 logo_height = fb_prepare_logo(info, ops->rotate);
596 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kzalloc(array3_size(logo_lines, new_cols, 2),
605 GFP_KERNEL);
606 if (save) {
607 int i = cols < new_cols ? cols : new_cols;
608 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
609 r = q - step;
610 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
611 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
612 r = q;
613 }
614 }
615 if (r == q) {
616 /* We can scroll screen down */
617 r = q - step - cols;
618 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
619 scr_memcpyw(r + step, r, vc->vc_size_row);
620 r -= cols;
621 }
622 if (!save) {
623 int lines;
624 if (vc->state.y + logo_lines >= rows)
625 lines = rows - vc->state.y - 1;
626 else
627 lines = logo_lines;
628 vc->state.y += lines;
629 vc->vc_pos += lines * vc->vc_size_row;
630 }
631 }
632 scr_memsetw((unsigned short *) vc->vc_origin,
633 erase,
634 vc->vc_size_row * logo_lines);
635
636 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
637 fbcon_clear_margins(vc, 0);
638 update_screen(vc);
639 }
640
641 if (save) {
642 q = (unsigned short *) (vc->vc_origin +
643 vc->vc_size_row *
644 rows);
645 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
646 vc->state.y += logo_lines;
647 vc->vc_pos += logo_lines * vc->vc_size_row;
648 kfree(save);
649 }
650
651 if (logo_shown == FBCON_LOGO_DONTSHOW)
652 return;
653
654 if (logo_lines > vc->vc_bottom) {
655 logo_shown = FBCON_LOGO_CANSHOW;
656 printk(KERN_INFO
657 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
658 } else {
659 logo_shown = FBCON_LOGO_DRAW;
660 vc->vc_top = logo_lines;
661 }
662 }
663 #endif /* MODULE */
664
665 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)666 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
667 {
668 struct fbcon_ops *ops = info->fbcon_par;
669
670 ops->p = &fb_display[vc->vc_num];
671
672 if ((info->flags & FBINFO_MISC_TILEBLITTING))
673 fbcon_set_tileops(vc, info);
674 else {
675 fbcon_set_rotation(info);
676 fbcon_set_bitops(ops);
677 }
678 }
679
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)680 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
681 {
682 int err = 0;
683
684 if (info->flags & FBINFO_MISC_TILEBLITTING &&
685 info->tileops->fb_get_tilemax(info) < charcount)
686 err = 1;
687
688 return err;
689 }
690 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)691 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
692 {
693 struct fbcon_ops *ops = info->fbcon_par;
694
695 info->flags &= ~FBINFO_MISC_TILEBLITTING;
696 ops->p = &fb_display[vc->vc_num];
697 fbcon_set_rotation(info);
698 fbcon_set_bitops(ops);
699 }
700
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)701 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
702 {
703 return 0;
704 }
705
706 #endif /* CONFIG_MISC_TILEBLITTING */
707
708
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit,int oldidx)709 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
710 int unit, int oldidx)
711 {
712 struct fbcon_ops *ops = NULL;
713 int err = 0;
714
715 if (!try_module_get(info->fbops->owner))
716 err = -ENODEV;
717
718 if (!err && info->fbops->fb_open &&
719 info->fbops->fb_open(info, 0))
720 err = -ENODEV;
721
722 if (!err) {
723 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
724 if (!ops)
725 err = -ENOMEM;
726 }
727
728 if (!err) {
729 ops->cur_blink_jiffies = HZ / 5;
730 ops->info = info;
731 info->fbcon_par = ops;
732
733 if (vc)
734 set_blitting_type(vc, info);
735 }
736
737 if (err) {
738 con2fb_map[unit] = oldidx;
739 module_put(info->fbops->owner);
740 }
741
742 return err;
743 }
744
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo,int unit,int oldidx,int found)745 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
746 struct fb_info *newinfo, int unit,
747 int oldidx, int found)
748 {
749 struct fbcon_ops *ops = oldinfo->fbcon_par;
750 int err = 0, ret;
751
752 if (oldinfo->fbops->fb_release &&
753 oldinfo->fbops->fb_release(oldinfo, 0)) {
754 con2fb_map[unit] = oldidx;
755 if (!found && newinfo->fbops->fb_release)
756 newinfo->fbops->fb_release(newinfo, 0);
757 if (!found)
758 module_put(newinfo->fbops->owner);
759 err = -ENODEV;
760 }
761
762 if (!err) {
763 fbcon_del_cursor_timer(oldinfo);
764 kfree(ops->cursor_state.mask);
765 kfree(ops->cursor_data);
766 kfree(ops->cursor_src);
767 kfree(ops->fontbuffer);
768 kfree(oldinfo->fbcon_par);
769 oldinfo->fbcon_par = NULL;
770 module_put(oldinfo->fbops->owner);
771 /*
772 If oldinfo and newinfo are driving the same hardware,
773 the fb_release() method of oldinfo may attempt to
774 restore the hardware state. This will leave the
775 newinfo in an undefined state. Thus, a call to
776 fb_set_par() may be needed for the newinfo.
777 */
778 if (newinfo && newinfo->fbops->fb_set_par) {
779 ret = newinfo->fbops->fb_set_par(newinfo);
780
781 if (ret)
782 printk(KERN_ERR "con2fb_release_oldinfo: "
783 "detected unhandled fb_set_par error, "
784 "error code %d\n", ret);
785 }
786 }
787
788 return err;
789 }
790
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)791 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
792 int unit, int show_logo)
793 {
794 struct fbcon_ops *ops = info->fbcon_par;
795 int ret;
796
797 ops->currcon = fg_console;
798
799 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
800 ret = info->fbops->fb_set_par(info);
801
802 if (ret)
803 printk(KERN_ERR "con2fb_init_display: detected "
804 "unhandled fb_set_par error, "
805 "error code %d\n", ret);
806 }
807
808 ops->flags |= FBCON_FLAGS_INIT;
809 ops->graphics = 0;
810 fbcon_set_disp(info, &info->var, unit);
811
812 if (show_logo) {
813 struct vc_data *fg_vc = vc_cons[fg_console].d;
814 struct fb_info *fg_info =
815 registered_fb[con2fb_map[fg_console]];
816
817 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
818 fg_vc->vc_rows, fg_vc->vc_cols,
819 fg_vc->vc_rows);
820 }
821
822 update_screen(vc_cons[fg_console].d);
823 }
824
825 /**
826 * set_con2fb_map - map console to frame buffer device
827 * @unit: virtual console number to map
828 * @newidx: frame buffer index to map virtual console to
829 * @user: user request
830 *
831 * Maps a virtual console @unit to a frame buffer device
832 * @newidx.
833 *
834 * This should be called with the console lock held.
835 */
set_con2fb_map(int unit,int newidx,int user)836 static int set_con2fb_map(int unit, int newidx, int user)
837 {
838 struct vc_data *vc = vc_cons[unit].d;
839 int oldidx = con2fb_map[unit];
840 struct fb_info *info = registered_fb[newidx];
841 struct fb_info *oldinfo = NULL;
842 int found, err = 0;
843
844 WARN_CONSOLE_UNLOCKED();
845
846 if (oldidx == newidx)
847 return 0;
848
849 if (!info)
850 return -EINVAL;
851
852 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
853 info_idx = newidx;
854 return do_fbcon_takeover(0);
855 }
856
857 if (oldidx != -1)
858 oldinfo = registered_fb[oldidx];
859
860 found = search_fb_in_map(newidx);
861
862 con2fb_map[unit] = newidx;
863 if (!err && !found)
864 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
865
866 /*
867 * If old fb is not mapped to any of the consoles,
868 * fbcon should release it.
869 */
870 if (!err && oldinfo && !search_fb_in_map(oldidx))
871 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
872 found);
873
874 if (!err) {
875 int show_logo = (fg_console == 0 && !user &&
876 logo_shown != FBCON_LOGO_DONTSHOW);
877
878 if (!found)
879 fbcon_add_cursor_timer(info);
880 con2fb_map_boot[unit] = newidx;
881 con2fb_init_display(vc, info, unit, show_logo);
882 }
883
884 if (!search_fb_in_map(info_idx))
885 info_idx = newidx;
886
887 return err;
888 }
889
890 /*
891 * Low Level Operations
892 */
893 /* 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)894 static int var_to_display(struct fbcon_display *disp,
895 struct fb_var_screeninfo *var,
896 struct fb_info *info)
897 {
898 disp->xres_virtual = var->xres_virtual;
899 disp->yres_virtual = var->yres_virtual;
900 disp->bits_per_pixel = var->bits_per_pixel;
901 disp->grayscale = var->grayscale;
902 disp->nonstd = var->nonstd;
903 disp->accel_flags = var->accel_flags;
904 disp->height = var->height;
905 disp->width = var->width;
906 disp->red = var->red;
907 disp->green = var->green;
908 disp->blue = var->blue;
909 disp->transp = var->transp;
910 disp->rotate = var->rotate;
911 disp->mode = fb_match_mode(var, &info->modelist);
912 if (disp->mode == NULL)
913 /* This should not happen */
914 return -EINVAL;
915 return 0;
916 }
917
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)918 static void display_to_var(struct fb_var_screeninfo *var,
919 struct fbcon_display *disp)
920 {
921 fb_videomode_to_var(var, disp->mode);
922 var->xres_virtual = disp->xres_virtual;
923 var->yres_virtual = disp->yres_virtual;
924 var->bits_per_pixel = disp->bits_per_pixel;
925 var->grayscale = disp->grayscale;
926 var->nonstd = disp->nonstd;
927 var->accel_flags = disp->accel_flags;
928 var->height = disp->height;
929 var->width = disp->width;
930 var->red = disp->red;
931 var->green = disp->green;
932 var->blue = disp->blue;
933 var->transp = disp->transp;
934 var->rotate = disp->rotate;
935 }
936
fbcon_startup(void)937 static const char *fbcon_startup(void)
938 {
939 const char *display_desc = "frame buffer device";
940 struct fbcon_display *p = &fb_display[fg_console];
941 struct vc_data *vc = vc_cons[fg_console].d;
942 const struct font_desc *font = NULL;
943 struct module *owner;
944 struct fb_info *info = NULL;
945 struct fbcon_ops *ops;
946 int rows, cols;
947
948 /*
949 * If num_registered_fb is zero, this is a call for the dummy part.
950 * The frame buffer devices weren't initialized yet.
951 */
952 if (!num_registered_fb || info_idx == -1)
953 return display_desc;
954 /*
955 * Instead of blindly using registered_fb[0], we use info_idx, set by
956 * fb_console_init();
957 */
958 info = registered_fb[info_idx];
959 if (!info)
960 return NULL;
961
962 owner = info->fbops->owner;
963 if (!try_module_get(owner))
964 return NULL;
965 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
966 module_put(owner);
967 return NULL;
968 }
969
970 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
971 if (!ops) {
972 module_put(owner);
973 return NULL;
974 }
975
976 ops->currcon = -1;
977 ops->graphics = 1;
978 ops->cur_rotate = -1;
979 ops->cur_blink_jiffies = HZ / 5;
980 ops->info = info;
981 info->fbcon_par = ops;
982
983 p->con_rotate = initial_rotation;
984 if (p->con_rotate == -1)
985 p->con_rotate = info->fbcon_rotate_hint;
986 if (p->con_rotate == -1)
987 p->con_rotate = FB_ROTATE_UR;
988
989 set_blitting_type(vc, info);
990
991 /* Setup default font */
992 if (!p->fontdata) {
993 if (!fontname[0] || !(font = find_font(fontname)))
994 font = get_default_font(info->var.xres,
995 info->var.yres,
996 info->pixmap.blit_x,
997 info->pixmap.blit_y);
998 vc->vc_font.width = font->width;
999 vc->vc_font.height = font->height;
1000 vc->vc_font.data = (void *)(p->fontdata = font->data);
1001 vc->vc_font.charcount = font->charcount;
1002 }
1003
1004 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1005 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1006 cols /= vc->vc_font.width;
1007 rows /= vc->vc_font.height;
1008 vc_resize(vc, cols, rows);
1009
1010 pr_debug("mode: %s\n", info->fix.id);
1011 pr_debug("visual: %d\n", info->fix.visual);
1012 pr_debug("res: %dx%d-%d\n", info->var.xres,
1013 info->var.yres,
1014 info->var.bits_per_pixel);
1015
1016 fbcon_add_cursor_timer(info);
1017 return display_desc;
1018 }
1019
fbcon_init(struct vc_data * vc,int init)1020 static void fbcon_init(struct vc_data *vc, int init)
1021 {
1022 struct fb_info *info;
1023 struct fbcon_ops *ops;
1024 struct vc_data **default_mode = vc->vc_display_fg;
1025 struct vc_data *svc = *default_mode;
1026 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1027 int logo = 1, new_rows, new_cols, rows, cols;
1028 int ret;
1029
1030 if (WARN_ON(info_idx == -1))
1031 return;
1032
1033 if (con2fb_map[vc->vc_num] == -1)
1034 con2fb_map[vc->vc_num] = info_idx;
1035
1036 info = registered_fb[con2fb_map[vc->vc_num]];
1037
1038 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1039 logo_shown = FBCON_LOGO_DONTSHOW;
1040
1041 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1042 (info->fix.type == FB_TYPE_TEXT))
1043 logo = 0;
1044
1045 if (var_to_display(p, &info->var, info))
1046 return;
1047
1048 if (!info->fbcon_par)
1049 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1050
1051 /* If we are not the first console on this
1052 fb, copy the font from that console */
1053 t = &fb_display[fg_console];
1054 if (!p->fontdata) {
1055 if (t->fontdata) {
1056 struct vc_data *fvc = vc_cons[fg_console].d;
1057
1058 vc->vc_font.data = (void *)(p->fontdata =
1059 fvc->vc_font.data);
1060 vc->vc_font.width = fvc->vc_font.width;
1061 vc->vc_font.height = fvc->vc_font.height;
1062 vc->vc_font.charcount = fvc->vc_font.charcount;
1063 p->userfont = t->userfont;
1064
1065 if (p->userfont)
1066 REFCOUNT(p->fontdata)++;
1067 } else {
1068 const struct font_desc *font = NULL;
1069
1070 if (!fontname[0] || !(font = find_font(fontname)))
1071 font = get_default_font(info->var.xres,
1072 info->var.yres,
1073 info->pixmap.blit_x,
1074 info->pixmap.blit_y);
1075 vc->vc_font.width = font->width;
1076 vc->vc_font.height = font->height;
1077 vc->vc_font.data = (void *)(p->fontdata = font->data);
1078 vc->vc_font.charcount = font->charcount;
1079 }
1080 }
1081
1082 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084 if (vc->vc_font.charcount == 256) {
1085 vc->vc_hi_font_mask = 0;
1086 } else {
1087 vc->vc_hi_font_mask = 0x100;
1088 if (vc->vc_can_do_color)
1089 vc->vc_complement_mask <<= 1;
1090 }
1091
1092 if (!*svc->vc_uni_pagedir_loc)
1093 con_set_default_unimap(svc);
1094 if (!*vc->vc_uni_pagedir_loc)
1095 con_copy_unimap(vc, svc);
1096
1097 ops = info->fbcon_par;
1098 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1099
1100 p->con_rotate = initial_rotation;
1101 if (p->con_rotate == -1)
1102 p->con_rotate = info->fbcon_rotate_hint;
1103 if (p->con_rotate == -1)
1104 p->con_rotate = FB_ROTATE_UR;
1105
1106 set_blitting_type(vc, info);
1107
1108 cols = vc->vc_cols;
1109 rows = vc->vc_rows;
1110 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1111 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1112 new_cols /= vc->vc_font.width;
1113 new_rows /= vc->vc_font.height;
1114
1115 /*
1116 * We must always set the mode. The mode of the previous console
1117 * driver could be in the same resolution but we are using different
1118 * hardware so we have to initialize the hardware.
1119 *
1120 * We need to do it in fbcon_init() to prevent screen corruption.
1121 */
1122 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1123 if (info->fbops->fb_set_par &&
1124 !(ops->flags & FBCON_FLAGS_INIT)) {
1125 ret = info->fbops->fb_set_par(info);
1126
1127 if (ret)
1128 printk(KERN_ERR "fbcon_init: detected "
1129 "unhandled fb_set_par error, "
1130 "error code %d\n", ret);
1131 }
1132
1133 ops->flags |= FBCON_FLAGS_INIT;
1134 }
1135
1136 ops->graphics = 0;
1137
1138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1139 if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
1140 !(info->flags & FBINFO_HWACCEL_DISABLED))
1141 p->scrollmode = SCROLL_MOVE;
1142 else /* default to something safe */
1143 p->scrollmode = SCROLL_REDRAW;
1144 #endif
1145
1146 /*
1147 * ++guenther: console.c:vc_allocate() relies on initializing
1148 * vc_{cols,rows}, but we must not set those if we are only
1149 * resizing the console.
1150 */
1151 if (init) {
1152 vc->vc_cols = new_cols;
1153 vc->vc_rows = new_rows;
1154 } else
1155 vc_resize(vc, new_cols, new_rows);
1156
1157 if (logo)
1158 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1159
1160 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1161 ops->rotate = FB_ROTATE_UR;
1162 set_blitting_type(vc, info);
1163 }
1164
1165 ops->p = &fb_display[fg_console];
1166 }
1167
fbcon_free_font(struct fbcon_display * p)1168 static void fbcon_free_font(struct fbcon_display *p)
1169 {
1170 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1171 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1172 p->fontdata = NULL;
1173 p->userfont = 0;
1174 }
1175
1176 static void set_vc_hi_font(struct vc_data *vc, bool set);
1177
fbcon_deinit(struct vc_data * vc)1178 static void fbcon_deinit(struct vc_data *vc)
1179 {
1180 struct fbcon_display *p = &fb_display[vc->vc_num];
1181 struct fb_info *info;
1182 struct fbcon_ops *ops;
1183 int idx;
1184
1185 fbcon_free_font(p);
1186 idx = con2fb_map[vc->vc_num];
1187
1188 if (idx == -1)
1189 goto finished;
1190
1191 info = registered_fb[idx];
1192
1193 if (!info)
1194 goto finished;
1195
1196 ops = info->fbcon_par;
1197
1198 if (!ops)
1199 goto finished;
1200
1201 if (con_is_visible(vc))
1202 fbcon_del_cursor_timer(info);
1203
1204 ops->flags &= ~FBCON_FLAGS_INIT;
1205 finished:
1206
1207 fbcon_free_font(p);
1208 vc->vc_font.data = NULL;
1209
1210 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1211 set_vc_hi_font(vc, false);
1212
1213 if (!con_is_bound(&fb_con))
1214 fbcon_exit();
1215
1216 if (vc->vc_num == logo_shown)
1217 logo_shown = FBCON_LOGO_CANSHOW;
1218
1219 return;
1220 }
1221
1222 /* ====================================================================== */
1223
1224 /* fbcon_XXX routines - interface used by the world
1225 *
1226 * This system is now divided into two levels because of complications
1227 * caused by hardware scrolling. Top level functions:
1228 *
1229 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1230 *
1231 * handles y values in range [0, scr_height-1] that correspond to real
1232 * screen positions. y_wrap shift means that first line of bitmap may be
1233 * anywhere on this display. These functions convert lineoffsets to
1234 * bitmap offsets and deal with the wrap-around case by splitting blits.
1235 *
1236 * fbcon_bmove_physical_8() -- These functions fast implementations
1237 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1238 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1239 *
1240 * WARNING:
1241 *
1242 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1243 * Implies should only really hardware scroll in rows. Only reason for
1244 * restriction is simplicity & efficiency at the moment.
1245 */
1246
fbcon_clear(struct vc_data * vc,int sy,int sx,int height,int width)1247 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1248 int width)
1249 {
1250 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1251 struct fbcon_ops *ops = info->fbcon_par;
1252
1253 struct fbcon_display *p = &fb_display[vc->vc_num];
1254 u_int y_break;
1255
1256 if (fbcon_is_inactive(vc, info))
1257 return;
1258
1259 if (!height || !width)
1260 return;
1261
1262 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1263 vc->vc_top = 0;
1264 /*
1265 * If the font dimensions are not an integral of the display
1266 * dimensions then the ops->clear below won't end up clearing
1267 * the margins. Call clear_margins here in case the logo
1268 * bitmap stretched into the margin area.
1269 */
1270 fbcon_clear_margins(vc, 0);
1271 }
1272
1273 /* Split blits that cross physical y_wrap boundary */
1274
1275 y_break = p->vrows - p->yscroll;
1276 if (sy < y_break && sy + height - 1 >= y_break) {
1277 u_int b = y_break - sy;
1278 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1279 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1280 width);
1281 } else
1282 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1283 }
1284
fbcon_putcs(struct vc_data * vc,const unsigned short * s,int count,int ypos,int xpos)1285 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1286 int count, int ypos, int xpos)
1287 {
1288 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1289 struct fbcon_display *p = &fb_display[vc->vc_num];
1290 struct fbcon_ops *ops = info->fbcon_par;
1291
1292 if (!fbcon_is_inactive(vc, info))
1293 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1294 get_color(vc, info, scr_readw(s), 1),
1295 get_color(vc, info, scr_readw(s), 0));
1296 }
1297
fbcon_putc(struct vc_data * vc,int c,int ypos,int xpos)1298 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1299 {
1300 unsigned short chr;
1301
1302 scr_writew(c, &chr);
1303 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1304 }
1305
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1306 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1307 {
1308 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1309 struct fbcon_ops *ops = info->fbcon_par;
1310
1311 if (!fbcon_is_inactive(vc, info))
1312 ops->clear_margins(vc, info, margin_color, bottom_only);
1313 }
1314
fbcon_cursor(struct vc_data * vc,int mode)1315 static void fbcon_cursor(struct vc_data *vc, int mode)
1316 {
1317 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1318 struct fbcon_ops *ops = info->fbcon_par;
1319 int c = scr_readw((u16 *) vc->vc_pos);
1320
1321 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1322
1323 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1324 return;
1325
1326 if (vc->vc_cursor_type & CUR_SW)
1327 fbcon_del_cursor_timer(info);
1328 else
1329 fbcon_add_cursor_timer(info);
1330
1331 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1332
1333 if (!ops->cursor)
1334 return;
1335
1336 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1337 get_color(vc, info, c, 0));
1338 }
1339
1340 static int scrollback_phys_max = 0;
1341 static int scrollback_max = 0;
1342 static int scrollback_current = 0;
1343
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1344 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1345 int unit)
1346 {
1347 struct fbcon_display *p, *t;
1348 struct vc_data **default_mode, *vc;
1349 struct vc_data *svc;
1350 struct fbcon_ops *ops = info->fbcon_par;
1351 int rows, cols;
1352
1353 p = &fb_display[unit];
1354
1355 if (var_to_display(p, var, info))
1356 return;
1357
1358 vc = vc_cons[unit].d;
1359
1360 if (!vc)
1361 return;
1362
1363 default_mode = vc->vc_display_fg;
1364 svc = *default_mode;
1365 t = &fb_display[svc->vc_num];
1366
1367 if (!vc->vc_font.data) {
1368 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1369 vc->vc_font.width = (*default_mode)->vc_font.width;
1370 vc->vc_font.height = (*default_mode)->vc_font.height;
1371 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1372 p->userfont = t->userfont;
1373 if (p->userfont)
1374 REFCOUNT(p->fontdata)++;
1375 }
1376
1377 var->activate = FB_ACTIVATE_NOW;
1378 info->var.activate = var->activate;
1379 var->yoffset = info->var.yoffset;
1380 var->xoffset = info->var.xoffset;
1381 fb_set_var(info, var);
1382 ops->var = info->var;
1383 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1384 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1385 if (vc->vc_font.charcount == 256) {
1386 vc->vc_hi_font_mask = 0;
1387 } else {
1388 vc->vc_hi_font_mask = 0x100;
1389 if (vc->vc_can_do_color)
1390 vc->vc_complement_mask <<= 1;
1391 }
1392
1393 if (!*svc->vc_uni_pagedir_loc)
1394 con_set_default_unimap(svc);
1395 if (!*vc->vc_uni_pagedir_loc)
1396 con_copy_unimap(vc, svc);
1397
1398 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1399 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1400 cols /= vc->vc_font.width;
1401 rows /= vc->vc_font.height;
1402 vc_resize(vc, cols, rows);
1403
1404 if (con_is_visible(vc)) {
1405 update_screen(vc);
1406 }
1407 }
1408
ywrap_up(struct vc_data * vc,int count)1409 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1410 {
1411 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1412 struct fbcon_ops *ops = info->fbcon_par;
1413 struct fbcon_display *p = &fb_display[vc->vc_num];
1414
1415 p->yscroll += count;
1416 if (p->yscroll >= p->vrows) /* Deal with wrap */
1417 p->yscroll -= p->vrows;
1418 ops->var.xoffset = 0;
1419 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1420 ops->var.vmode |= FB_VMODE_YWRAP;
1421 ops->update_start(info);
1422 scrollback_max += count;
1423 if (scrollback_max > scrollback_phys_max)
1424 scrollback_max = scrollback_phys_max;
1425 scrollback_current = 0;
1426 }
1427
ywrap_down(struct vc_data * vc,int count)1428 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1429 {
1430 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1431 struct fbcon_ops *ops = info->fbcon_par;
1432 struct fbcon_display *p = &fb_display[vc->vc_num];
1433
1434 p->yscroll -= count;
1435 if (p->yscroll < 0) /* Deal with wrap */
1436 p->yscroll += p->vrows;
1437 ops->var.xoffset = 0;
1438 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1439 ops->var.vmode |= FB_VMODE_YWRAP;
1440 ops->update_start(info);
1441 scrollback_max -= count;
1442 if (scrollback_max < 0)
1443 scrollback_max = 0;
1444 scrollback_current = 0;
1445 }
1446
ypan_up(struct vc_data * vc,int count)1447 static __inline__ void ypan_up(struct vc_data *vc, int count)
1448 {
1449 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1450 struct fbcon_display *p = &fb_display[vc->vc_num];
1451 struct fbcon_ops *ops = info->fbcon_par;
1452
1453 p->yscroll += count;
1454 if (p->yscroll > p->vrows - vc->vc_rows) {
1455 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1456 0, 0, 0, vc->vc_rows, vc->vc_cols);
1457 p->yscroll -= p->vrows - vc->vc_rows;
1458 }
1459
1460 ops->var.xoffset = 0;
1461 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1462 ops->var.vmode &= ~FB_VMODE_YWRAP;
1463 ops->update_start(info);
1464 fbcon_clear_margins(vc, 1);
1465 scrollback_max += count;
1466 if (scrollback_max > scrollback_phys_max)
1467 scrollback_max = scrollback_phys_max;
1468 scrollback_current = 0;
1469 }
1470
ypan_up_redraw(struct vc_data * vc,int t,int count)1471 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1472 {
1473 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1474 struct fbcon_ops *ops = info->fbcon_par;
1475 struct fbcon_display *p = &fb_display[vc->vc_num];
1476
1477 p->yscroll += count;
1478
1479 if (p->yscroll > p->vrows - vc->vc_rows) {
1480 p->yscroll -= p->vrows - vc->vc_rows;
1481 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1482 }
1483
1484 ops->var.xoffset = 0;
1485 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1486 ops->var.vmode &= ~FB_VMODE_YWRAP;
1487 ops->update_start(info);
1488 fbcon_clear_margins(vc, 1);
1489 scrollback_max += count;
1490 if (scrollback_max > scrollback_phys_max)
1491 scrollback_max = scrollback_phys_max;
1492 scrollback_current = 0;
1493 }
1494
ypan_down(struct vc_data * vc,int count)1495 static __inline__ void ypan_down(struct vc_data *vc, int count)
1496 {
1497 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1498 struct fbcon_display *p = &fb_display[vc->vc_num];
1499 struct fbcon_ops *ops = info->fbcon_par;
1500
1501 p->yscroll -= count;
1502 if (p->yscroll < 0) {
1503 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1504 0, vc->vc_rows, vc->vc_cols);
1505 p->yscroll += p->vrows - vc->vc_rows;
1506 }
1507
1508 ops->var.xoffset = 0;
1509 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1510 ops->var.vmode &= ~FB_VMODE_YWRAP;
1511 ops->update_start(info);
1512 fbcon_clear_margins(vc, 1);
1513 scrollback_max -= count;
1514 if (scrollback_max < 0)
1515 scrollback_max = 0;
1516 scrollback_current = 0;
1517 }
1518
ypan_down_redraw(struct vc_data * vc,int t,int count)1519 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1520 {
1521 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1522 struct fbcon_ops *ops = info->fbcon_par;
1523 struct fbcon_display *p = &fb_display[vc->vc_num];
1524
1525 p->yscroll -= count;
1526
1527 if (p->yscroll < 0) {
1528 p->yscroll += p->vrows - vc->vc_rows;
1529 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1530 }
1531
1532 ops->var.xoffset = 0;
1533 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1534 ops->var.vmode &= ~FB_VMODE_YWRAP;
1535 ops->update_start(info);
1536 fbcon_clear_margins(vc, 1);
1537 scrollback_max -= count;
1538 if (scrollback_max < 0)
1539 scrollback_max = 0;
1540 scrollback_current = 0;
1541 }
1542
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1543 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1544 int line, int count, int dy)
1545 {
1546 unsigned short *s = (unsigned short *)
1547 (vc->vc_origin + vc->vc_size_row * line);
1548
1549 while (count--) {
1550 unsigned short *start = s;
1551 unsigned short *le = advance_row(s, 1);
1552 unsigned short c;
1553 int x = 0;
1554 unsigned short attr = 1;
1555
1556 do {
1557 c = scr_readw(s);
1558 if (attr != (c & 0xff00)) {
1559 attr = c & 0xff00;
1560 if (s > start) {
1561 fbcon_putcs(vc, start, s - start,
1562 dy, x);
1563 x += s - start;
1564 start = s;
1565 }
1566 }
1567 console_conditional_schedule();
1568 s++;
1569 } while (s < le);
1570 if (s > start)
1571 fbcon_putcs(vc, start, s - start, dy, x);
1572 console_conditional_schedule();
1573 dy++;
1574 }
1575 }
1576
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1577 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1578 struct fbcon_display *p, int line, int count, int ycount)
1579 {
1580 int offset = ycount * vc->vc_cols;
1581 unsigned short *d = (unsigned short *)
1582 (vc->vc_origin + vc->vc_size_row * line);
1583 unsigned short *s = d + offset;
1584 struct fbcon_ops *ops = info->fbcon_par;
1585
1586 while (count--) {
1587 unsigned short *start = s;
1588 unsigned short *le = advance_row(s, 1);
1589 unsigned short c;
1590 int x = 0;
1591
1592 do {
1593 c = scr_readw(s);
1594
1595 if (c == scr_readw(d)) {
1596 if (s > start) {
1597 ops->bmove(vc, info, line + ycount, x,
1598 line, x, 1, s-start);
1599 x += s - start + 1;
1600 start = s + 1;
1601 } else {
1602 x++;
1603 start++;
1604 }
1605 }
1606
1607 scr_writew(c, d);
1608 console_conditional_schedule();
1609 s++;
1610 d++;
1611 } while (s < le);
1612 if (s > start)
1613 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1614 s-start);
1615 console_conditional_schedule();
1616 if (ycount > 0)
1617 line++;
1618 else {
1619 line--;
1620 /* NOTE: We subtract two lines from these pointers */
1621 s -= vc->vc_size_row;
1622 d -= vc->vc_size_row;
1623 }
1624 }
1625 }
1626
fbcon_redraw(struct vc_data * vc,struct fbcon_display * p,int line,int count,int offset)1627 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1628 int line, int count, int offset)
1629 {
1630 unsigned short *d = (unsigned short *)
1631 (vc->vc_origin + vc->vc_size_row * line);
1632 unsigned short *s = d + offset;
1633
1634 while (count--) {
1635 unsigned short *start = s;
1636 unsigned short *le = advance_row(s, 1);
1637 unsigned short c;
1638 int x = 0;
1639 unsigned short attr = 1;
1640
1641 do {
1642 c = scr_readw(s);
1643 if (attr != (c & 0xff00)) {
1644 attr = c & 0xff00;
1645 if (s > start) {
1646 fbcon_putcs(vc, start, s - start,
1647 line, x);
1648 x += s - start;
1649 start = s;
1650 }
1651 }
1652 if (c == scr_readw(d)) {
1653 if (s > start) {
1654 fbcon_putcs(vc, start, s - start,
1655 line, x);
1656 x += s - start + 1;
1657 start = s + 1;
1658 } else {
1659 x++;
1660 start++;
1661 }
1662 }
1663 scr_writew(c, d);
1664 console_conditional_schedule();
1665 s++;
1666 d++;
1667 } while (s < le);
1668 if (s > start)
1669 fbcon_putcs(vc, start, s - start, line, x);
1670 console_conditional_schedule();
1671 if (offset > 0)
1672 line++;
1673 else {
1674 line--;
1675 /* NOTE: We subtract two lines from these pointers */
1676 s -= vc->vc_size_row;
1677 d -= vc->vc_size_row;
1678 }
1679 }
1680 }
1681
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1682 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1683 enum con_scroll dir, unsigned int count)
1684 {
1685 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1686 struct fbcon_display *p = &fb_display[vc->vc_num];
1687 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1688
1689 if (fbcon_is_inactive(vc, info))
1690 return true;
1691
1692 fbcon_cursor(vc, CM_ERASE);
1693
1694 /*
1695 * ++Geert: Only use ywrap/ypan if the console is in text mode
1696 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1697 * whole screen (prevents flicker).
1698 */
1699
1700 switch (dir) {
1701 case SM_UP:
1702 if (count > vc->vc_rows) /* Maximum realistic size */
1703 count = vc->vc_rows;
1704 switch (fb_scrollmode(p)) {
1705 case SCROLL_MOVE:
1706 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1707 count);
1708 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1709 scr_memsetw((unsigned short *) (vc->vc_origin +
1710 vc->vc_size_row *
1711 (b - count)),
1712 vc->vc_video_erase_char,
1713 vc->vc_size_row * count);
1714 return true;
1715
1716 case SCROLL_WRAP_MOVE:
1717 if (b - t - count > 3 * vc->vc_rows >> 2) {
1718 if (t > 0)
1719 fbcon_bmove(vc, 0, 0, count, 0, t,
1720 vc->vc_cols);
1721 ywrap_up(vc, count);
1722 if (vc->vc_rows - b > 0)
1723 fbcon_bmove(vc, b - count, 0, b, 0,
1724 vc->vc_rows - b,
1725 vc->vc_cols);
1726 } else if (info->flags & FBINFO_READS_FAST)
1727 fbcon_bmove(vc, t + count, 0, t, 0,
1728 b - t - count, vc->vc_cols);
1729 else
1730 goto redraw_up;
1731 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1732 break;
1733
1734 case SCROLL_PAN_REDRAW:
1735 if ((p->yscroll + count <=
1736 2 * (p->vrows - vc->vc_rows))
1737 && ((!scroll_partial && (b - t == vc->vc_rows))
1738 || (scroll_partial
1739 && (b - t - count >
1740 3 * vc->vc_rows >> 2)))) {
1741 if (t > 0)
1742 fbcon_redraw_move(vc, p, 0, t, count);
1743 ypan_up_redraw(vc, t, count);
1744 if (vc->vc_rows - b > 0)
1745 fbcon_redraw_move(vc, p, b,
1746 vc->vc_rows - b, b);
1747 } else
1748 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1749 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1750 break;
1751
1752 case SCROLL_PAN_MOVE:
1753 if ((p->yscroll + count <=
1754 2 * (p->vrows - vc->vc_rows))
1755 && ((!scroll_partial && (b - t == vc->vc_rows))
1756 || (scroll_partial
1757 && (b - t - count >
1758 3 * vc->vc_rows >> 2)))) {
1759 if (t > 0)
1760 fbcon_bmove(vc, 0, 0, count, 0, t,
1761 vc->vc_cols);
1762 ypan_up(vc, count);
1763 if (vc->vc_rows - b > 0)
1764 fbcon_bmove(vc, b - count, 0, b, 0,
1765 vc->vc_rows - b,
1766 vc->vc_cols);
1767 } else if (info->flags & FBINFO_READS_FAST)
1768 fbcon_bmove(vc, t + count, 0, t, 0,
1769 b - t - count, vc->vc_cols);
1770 else
1771 goto redraw_up;
1772 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1773 break;
1774
1775 case SCROLL_REDRAW:
1776 redraw_up:
1777 fbcon_redraw(vc, p, t, b - t - count,
1778 count * vc->vc_cols);
1779 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1780 scr_memsetw((unsigned short *) (vc->vc_origin +
1781 vc->vc_size_row *
1782 (b - count)),
1783 vc->vc_video_erase_char,
1784 vc->vc_size_row * count);
1785 return true;
1786 }
1787 break;
1788
1789 case SM_DOWN:
1790 if (count > vc->vc_rows) /* Maximum realistic size */
1791 count = vc->vc_rows;
1792 switch (fb_scrollmode(p)) {
1793 case SCROLL_MOVE:
1794 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1795 -count);
1796 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1797 scr_memsetw((unsigned short *) (vc->vc_origin +
1798 vc->vc_size_row *
1799 t),
1800 vc->vc_video_erase_char,
1801 vc->vc_size_row * count);
1802 return true;
1803
1804 case SCROLL_WRAP_MOVE:
1805 if (b - t - count > 3 * vc->vc_rows >> 2) {
1806 if (vc->vc_rows - b > 0)
1807 fbcon_bmove(vc, b, 0, b - count, 0,
1808 vc->vc_rows - b,
1809 vc->vc_cols);
1810 ywrap_down(vc, count);
1811 if (t > 0)
1812 fbcon_bmove(vc, count, 0, 0, 0, t,
1813 vc->vc_cols);
1814 } else if (info->flags & FBINFO_READS_FAST)
1815 fbcon_bmove(vc, t, 0, t + count, 0,
1816 b - t - count, vc->vc_cols);
1817 else
1818 goto redraw_down;
1819 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1820 break;
1821
1822 case SCROLL_PAN_MOVE:
1823 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1824 && ((!scroll_partial && (b - t == vc->vc_rows))
1825 || (scroll_partial
1826 && (b - t - count >
1827 3 * vc->vc_rows >> 2)))) {
1828 if (vc->vc_rows - b > 0)
1829 fbcon_bmove(vc, b, 0, b - count, 0,
1830 vc->vc_rows - b,
1831 vc->vc_cols);
1832 ypan_down(vc, count);
1833 if (t > 0)
1834 fbcon_bmove(vc, count, 0, 0, 0, t,
1835 vc->vc_cols);
1836 } else if (info->flags & FBINFO_READS_FAST)
1837 fbcon_bmove(vc, t, 0, t + count, 0,
1838 b - t - count, vc->vc_cols);
1839 else
1840 goto redraw_down;
1841 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1842 break;
1843
1844 case SCROLL_PAN_REDRAW:
1845 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1846 && ((!scroll_partial && (b - t == vc->vc_rows))
1847 || (scroll_partial
1848 && (b - t - count >
1849 3 * vc->vc_rows >> 2)))) {
1850 if (vc->vc_rows - b > 0)
1851 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1852 b - count);
1853 ypan_down_redraw(vc, t, count);
1854 if (t > 0)
1855 fbcon_redraw_move(vc, p, count, t, 0);
1856 } else
1857 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1858 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1859 break;
1860
1861 case SCROLL_REDRAW:
1862 redraw_down:
1863 fbcon_redraw(vc, p, b - 1, b - t - count,
1864 -count * vc->vc_cols);
1865 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1866 scr_memsetw((unsigned short *) (vc->vc_origin +
1867 vc->vc_size_row *
1868 t),
1869 vc->vc_video_erase_char,
1870 vc->vc_size_row * count);
1871 return true;
1872 }
1873 }
1874 return false;
1875 }
1876
1877
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1878 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1879 int height, int width)
1880 {
1881 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1882 struct fbcon_display *p = &fb_display[vc->vc_num];
1883
1884 if (fbcon_is_inactive(vc, info))
1885 return;
1886
1887 if (!width || !height)
1888 return;
1889
1890 /* Split blits that cross physical y_wrap case.
1891 * Pathological case involves 4 blits, better to use recursive
1892 * code rather than unrolled case
1893 *
1894 * Recursive invocations don't need to erase the cursor over and
1895 * over again, so we use fbcon_bmove_rec()
1896 */
1897 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1898 p->vrows - p->yscroll);
1899 }
1900
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)1901 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1902 int dy, int dx, int height, int width, u_int y_break)
1903 {
1904 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1905 struct fbcon_ops *ops = info->fbcon_par;
1906 u_int b;
1907
1908 if (sy < y_break && sy + height > y_break) {
1909 b = y_break - sy;
1910 if (dy < sy) { /* Avoid trashing self */
1911 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1912 y_break);
1913 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1914 height - b, width, y_break);
1915 } else {
1916 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1917 height - b, width, y_break);
1918 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1919 y_break);
1920 }
1921 return;
1922 }
1923
1924 if (dy < y_break && dy + height > y_break) {
1925 b = y_break - dy;
1926 if (dy < sy) { /* Avoid trashing self */
1927 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1928 y_break);
1929 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1930 height - b, width, y_break);
1931 } else {
1932 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1933 height - b, width, y_break);
1934 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1935 y_break);
1936 }
1937 return;
1938 }
1939 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1940 height, width);
1941 }
1942
updatescrollmode_accel(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1943 static void updatescrollmode_accel(struct fbcon_display *p,
1944 struct fb_info *info,
1945 struct vc_data *vc)
1946 {
1947 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1948 struct fbcon_ops *ops = info->fbcon_par;
1949 int cap = info->flags;
1950 u16 t = 0;
1951 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1952 info->fix.xpanstep);
1953 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1954 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1955 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1956 info->var.xres_virtual);
1957 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1958 divides(ypan, vc->vc_font.height) && vyres > yres;
1959 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1960 divides(ywrap, vc->vc_font.height) &&
1961 divides(vc->vc_font.height, vyres) &&
1962 divides(vc->vc_font.height, yres);
1963 int reading_fast = cap & FBINFO_READS_FAST;
1964 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1965 !(cap & FBINFO_HWACCEL_DISABLED);
1966 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1967 !(cap & FBINFO_HWACCEL_DISABLED);
1968
1969 if (good_wrap || good_pan) {
1970 if (reading_fast || fast_copyarea)
1971 p->scrollmode = good_wrap ?
1972 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1973 else
1974 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1975 SCROLL_PAN_REDRAW;
1976 } else {
1977 if (reading_fast || (fast_copyarea && !fast_imageblit))
1978 p->scrollmode = SCROLL_MOVE;
1979 else
1980 p->scrollmode = SCROLL_REDRAW;
1981 }
1982 #endif
1983 }
1984
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1985 static void updatescrollmode(struct fbcon_display *p,
1986 struct fb_info *info,
1987 struct vc_data *vc)
1988 {
1989 struct fbcon_ops *ops = info->fbcon_par;
1990 int fh = vc->vc_font.height;
1991 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1992 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1993 info->var.xres_virtual);
1994
1995 p->vrows = vyres/fh;
1996 if (yres > (fh * (vc->vc_rows + 1)))
1997 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1998 if ((yres % fh) && (vyres % fh < yres % fh))
1999 p->vrows--;
2000
2001 /* update scrollmode in case hardware acceleration is used */
2002 updatescrollmode_accel(p, info, vc);
2003 }
2004
2005 #define PITCH(w) (((w) + 7) >> 3)
2006 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2007
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,unsigned int user)2008 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2009 unsigned int height, unsigned int user)
2010 {
2011 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2012 struct fbcon_ops *ops = info->fbcon_par;
2013 struct fbcon_display *p = &fb_display[vc->vc_num];
2014 struct fb_var_screeninfo var = info->var;
2015 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2016
2017 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2018 int size;
2019 int pitch = PITCH(vc->vc_font.width);
2020
2021 /*
2022 * If user font, ensure that a possible change to user font
2023 * height or width will not allow a font data out-of-bounds access.
2024 * NOTE: must use original charcount in calculation as font
2025 * charcount can change and cannot be used to determine the
2026 * font data allocated size.
2027 */
2028 if (pitch <= 0)
2029 return -EINVAL;
2030 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
2031 if (size > FNTSIZE(vc->vc_font.data))
2032 return -EINVAL;
2033 }
2034
2035 virt_w = FBCON_SWAP(ops->rotate, width, height);
2036 virt_h = FBCON_SWAP(ops->rotate, height, width);
2037 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2038 vc->vc_font.height);
2039 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2040 vc->vc_font.width);
2041 var.xres = virt_w * virt_fw;
2042 var.yres = virt_h * virt_fh;
2043 x_diff = info->var.xres - var.xres;
2044 y_diff = info->var.yres - var.yres;
2045 if (x_diff < 0 || x_diff > virt_fw ||
2046 y_diff < 0 || y_diff > virt_fh) {
2047 const struct fb_videomode *mode;
2048
2049 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2050 mode = fb_find_best_mode(&var, &info->modelist);
2051 if (mode == NULL)
2052 return -EINVAL;
2053 display_to_var(&var, p);
2054 fb_videomode_to_var(&var, mode);
2055
2056 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2057 return -EINVAL;
2058
2059 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2060 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2061 var.activate = FB_ACTIVATE_NOW |
2062 FB_ACTIVATE_FORCE;
2063 fb_set_var(info, &var);
2064 }
2065 var_to_display(p, &info->var, info);
2066 ops->var = info->var;
2067 }
2068 updatescrollmode(p, info, vc);
2069 return 0;
2070 }
2071
fbcon_switch(struct vc_data * vc)2072 static int fbcon_switch(struct vc_data *vc)
2073 {
2074 struct fb_info *info, *old_info = NULL;
2075 struct fbcon_ops *ops;
2076 struct fbcon_display *p = &fb_display[vc->vc_num];
2077 struct fb_var_screeninfo var;
2078 int i, ret, prev_console;
2079
2080 info = registered_fb[con2fb_map[vc->vc_num]];
2081 ops = info->fbcon_par;
2082
2083 if (logo_shown >= 0) {
2084 struct vc_data *conp2 = vc_cons[logo_shown].d;
2085
2086 if (conp2->vc_top == logo_lines
2087 && conp2->vc_bottom == conp2->vc_rows)
2088 conp2->vc_top = 0;
2089 logo_shown = FBCON_LOGO_CANSHOW;
2090 }
2091
2092 prev_console = ops->currcon;
2093 if (prev_console != -1)
2094 old_info = registered_fb[con2fb_map[prev_console]];
2095 /*
2096 * FIXME: If we have multiple fbdev's loaded, we need to
2097 * update all info->currcon. Perhaps, we can place this
2098 * in a centralized structure, but this might break some
2099 * drivers.
2100 *
2101 * info->currcon = vc->vc_num;
2102 */
2103 for_each_registered_fb(i) {
2104 if (registered_fb[i]->fbcon_par) {
2105 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2106
2107 o->currcon = vc->vc_num;
2108 }
2109 }
2110 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2111 display_to_var(&var, p);
2112 var.activate = FB_ACTIVATE_NOW;
2113
2114 /*
2115 * make sure we don't unnecessarily trip the memcmp()
2116 * in fb_set_var()
2117 */
2118 info->var.activate = var.activate;
2119 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2120 fb_set_var(info, &var);
2121 ops->var = info->var;
2122
2123 if (old_info != NULL && (old_info != info ||
2124 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2125 if (info->fbops->fb_set_par) {
2126 ret = info->fbops->fb_set_par(info);
2127
2128 if (ret)
2129 printk(KERN_ERR "fbcon_switch: detected "
2130 "unhandled fb_set_par error, "
2131 "error code %d\n", ret);
2132 }
2133
2134 if (old_info != info)
2135 fbcon_del_cursor_timer(old_info);
2136 }
2137
2138 if (fbcon_is_inactive(vc, info) ||
2139 ops->blank_state != FB_BLANK_UNBLANK)
2140 fbcon_del_cursor_timer(info);
2141 else
2142 fbcon_add_cursor_timer(info);
2143
2144 set_blitting_type(vc, info);
2145 ops->cursor_reset = 1;
2146
2147 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2148 ops->rotate = FB_ROTATE_UR;
2149 set_blitting_type(vc, info);
2150 }
2151
2152 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2153 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2154
2155 if (vc->vc_font.charcount > 256)
2156 vc->vc_complement_mask <<= 1;
2157
2158 updatescrollmode(p, info, vc);
2159
2160 switch (fb_scrollmode(p)) {
2161 case SCROLL_WRAP_MOVE:
2162 scrollback_phys_max = p->vrows - vc->vc_rows;
2163 break;
2164 case SCROLL_PAN_MOVE:
2165 case SCROLL_PAN_REDRAW:
2166 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2167 if (scrollback_phys_max < 0)
2168 scrollback_phys_max = 0;
2169 break;
2170 default:
2171 scrollback_phys_max = 0;
2172 break;
2173 }
2174
2175 scrollback_max = 0;
2176 scrollback_current = 0;
2177
2178 if (!fbcon_is_inactive(vc, info)) {
2179 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2180 ops->update_start(info);
2181 }
2182
2183 fbcon_set_palette(vc, color_table);
2184 fbcon_clear_margins(vc, 0);
2185
2186 if (logo_shown == FBCON_LOGO_DRAW) {
2187
2188 logo_shown = fg_console;
2189 /* This is protected above by initmem_freed */
2190 fb_show_logo(info, ops->rotate);
2191 update_region(vc,
2192 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2193 vc->vc_size_row * (vc->vc_bottom -
2194 vc->vc_top) / 2);
2195 return 0;
2196 }
2197 return 1;
2198 }
2199
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2200 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2201 int blank)
2202 {
2203 if (blank) {
2204 unsigned short charmask = vc->vc_hi_font_mask ?
2205 0x1ff : 0xff;
2206 unsigned short oldc;
2207
2208 oldc = vc->vc_video_erase_char;
2209 vc->vc_video_erase_char &= charmask;
2210 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2211 vc->vc_video_erase_char = oldc;
2212 }
2213 }
2214
fbcon_blank(struct vc_data * vc,int blank,int mode_switch)2215 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2216 {
2217 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2218 struct fbcon_ops *ops = info->fbcon_par;
2219
2220 if (mode_switch) {
2221 struct fb_var_screeninfo var = info->var;
2222
2223 ops->graphics = 1;
2224
2225 if (!blank) {
2226 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2227 FB_ACTIVATE_KD_TEXT;
2228 fb_set_var(info, &var);
2229 ops->graphics = 0;
2230 ops->var = info->var;
2231 }
2232 }
2233
2234 if (!fbcon_is_inactive(vc, info)) {
2235 if (ops->blank_state != blank) {
2236 ops->blank_state = blank;
2237 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2238 ops->cursor_flash = (!blank);
2239
2240 if (fb_blank(info, blank))
2241 fbcon_generic_blank(vc, info, blank);
2242 }
2243
2244 if (!blank)
2245 update_screen(vc);
2246 }
2247
2248 if (mode_switch || fbcon_is_inactive(vc, info) ||
2249 ops->blank_state != FB_BLANK_UNBLANK)
2250 fbcon_del_cursor_timer(info);
2251 else
2252 fbcon_add_cursor_timer(info);
2253
2254 return 0;
2255 }
2256
fbcon_debug_enter(struct vc_data * vc)2257 static int fbcon_debug_enter(struct vc_data *vc)
2258 {
2259 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2260 struct fbcon_ops *ops = info->fbcon_par;
2261
2262 ops->save_graphics = ops->graphics;
2263 ops->graphics = 0;
2264 if (info->fbops->fb_debug_enter)
2265 info->fbops->fb_debug_enter(info);
2266 fbcon_set_palette(vc, color_table);
2267 return 0;
2268 }
2269
fbcon_debug_leave(struct vc_data * vc)2270 static int fbcon_debug_leave(struct vc_data *vc)
2271 {
2272 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2273 struct fbcon_ops *ops = info->fbcon_par;
2274
2275 ops->graphics = ops->save_graphics;
2276 if (info->fbops->fb_debug_leave)
2277 info->fbops->fb_debug_leave(info);
2278 return 0;
2279 }
2280
fbcon_get_font(struct vc_data * vc,struct console_font * font)2281 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2282 {
2283 u8 *fontdata = vc->vc_font.data;
2284 u8 *data = font->data;
2285 int i, j;
2286
2287 font->width = vc->vc_font.width;
2288 font->height = vc->vc_font.height;
2289 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2290 if (!font->data)
2291 return 0;
2292
2293 if (font->width <= 8) {
2294 j = vc->vc_font.height;
2295 if (font->charcount * j > FNTSIZE(fontdata))
2296 return -EINVAL;
2297
2298 for (i = 0; i < font->charcount; i++) {
2299 memcpy(data, fontdata, j);
2300 memset(data + j, 0, 32 - j);
2301 data += 32;
2302 fontdata += j;
2303 }
2304 } else if (font->width <= 16) {
2305 j = vc->vc_font.height * 2;
2306 if (font->charcount * j > FNTSIZE(fontdata))
2307 return -EINVAL;
2308
2309 for (i = 0; i < font->charcount; i++) {
2310 memcpy(data, fontdata, j);
2311 memset(data + j, 0, 64 - j);
2312 data += 64;
2313 fontdata += j;
2314 }
2315 } else if (font->width <= 24) {
2316 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2317 return -EINVAL;
2318
2319 for (i = 0; i < font->charcount; i++) {
2320 for (j = 0; j < vc->vc_font.height; j++) {
2321 *data++ = fontdata[0];
2322 *data++ = fontdata[1];
2323 *data++ = fontdata[2];
2324 fontdata += sizeof(u32);
2325 }
2326 memset(data, 0, 3 * (32 - j));
2327 data += 3 * (32 - j);
2328 }
2329 } else {
2330 j = vc->vc_font.height * 4;
2331 if (font->charcount * j > FNTSIZE(fontdata))
2332 return -EINVAL;
2333
2334 for (i = 0; i < font->charcount; i++) {
2335 memcpy(data, fontdata, j);
2336 memset(data + j, 0, 128 - j);
2337 data += 128;
2338 fontdata += j;
2339 }
2340 }
2341 return 0;
2342 }
2343
2344 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2345 static void set_vc_hi_font(struct vc_data *vc, bool set)
2346 {
2347 if (!set) {
2348 vc->vc_hi_font_mask = 0;
2349 if (vc->vc_can_do_color) {
2350 vc->vc_complement_mask >>= 1;
2351 vc->vc_s_complement_mask >>= 1;
2352 }
2353
2354 /* ++Edmund: reorder the attribute bits */
2355 if (vc->vc_can_do_color) {
2356 unsigned short *cp =
2357 (unsigned short *) vc->vc_origin;
2358 int count = vc->vc_screenbuf_size / 2;
2359 unsigned short c;
2360 for (; count > 0; count--, cp++) {
2361 c = scr_readw(cp);
2362 scr_writew(((c & 0xfe00) >> 1) |
2363 (c & 0xff), cp);
2364 }
2365 c = vc->vc_video_erase_char;
2366 vc->vc_video_erase_char =
2367 ((c & 0xfe00) >> 1) | (c & 0xff);
2368 vc->vc_attr >>= 1;
2369 }
2370 } else {
2371 vc->vc_hi_font_mask = 0x100;
2372 if (vc->vc_can_do_color) {
2373 vc->vc_complement_mask <<= 1;
2374 vc->vc_s_complement_mask <<= 1;
2375 }
2376
2377 /* ++Edmund: reorder the attribute bits */
2378 {
2379 unsigned short *cp =
2380 (unsigned short *) vc->vc_origin;
2381 int count = vc->vc_screenbuf_size / 2;
2382 unsigned short c;
2383 for (; count > 0; count--, cp++) {
2384 unsigned short newc;
2385 c = scr_readw(cp);
2386 if (vc->vc_can_do_color)
2387 newc =
2388 ((c & 0xff00) << 1) | (c &
2389 0xff);
2390 else
2391 newc = c & ~0x100;
2392 scr_writew(newc, cp);
2393 }
2394 c = vc->vc_video_erase_char;
2395 if (vc->vc_can_do_color) {
2396 vc->vc_video_erase_char =
2397 ((c & 0xff00) << 1) | (c & 0xff);
2398 vc->vc_attr <<= 1;
2399 } else
2400 vc->vc_video_erase_char = c & ~0x100;
2401 }
2402 }
2403 }
2404
fbcon_do_set_font(struct vc_data * vc,int w,int h,int charcount,const u8 * data,int userfont)2405 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2406 const u8 * data, int userfont)
2407 {
2408 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2409 struct fbcon_ops *ops = info->fbcon_par;
2410 struct fbcon_display *p = &fb_display[vc->vc_num];
2411 int resize, ret, old_userfont, old_width, old_height, old_charcount;
2412 u8 *old_data = vc->vc_font.data;
2413
2414 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2415 vc->vc_font.data = (void *)(p->fontdata = data);
2416 old_userfont = p->userfont;
2417 if ((p->userfont = userfont))
2418 REFCOUNT(data)++;
2419
2420 old_width = vc->vc_font.width;
2421 old_height = vc->vc_font.height;
2422 old_charcount = vc->vc_font.charcount;
2423
2424 vc->vc_font.width = w;
2425 vc->vc_font.height = h;
2426 vc->vc_font.charcount = charcount;
2427 if (vc->vc_hi_font_mask && charcount == 256)
2428 set_vc_hi_font(vc, false);
2429 else if (!vc->vc_hi_font_mask && charcount == 512)
2430 set_vc_hi_font(vc, true);
2431
2432 if (resize) {
2433 int cols, rows;
2434
2435 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2436 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2437 cols /= w;
2438 rows /= h;
2439 ret = vc_resize(vc, cols, rows);
2440 if (ret)
2441 goto err_out;
2442 } else if (con_is_visible(vc)
2443 && vc->vc_mode == KD_TEXT) {
2444 fbcon_clear_margins(vc, 0);
2445 update_screen(vc);
2446 }
2447
2448 if (old_userfont && (--REFCOUNT(old_data) == 0))
2449 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2450 return 0;
2451
2452 err_out:
2453 p->fontdata = old_data;
2454 vc->vc_font.data = old_data;
2455
2456 if (userfont) {
2457 p->userfont = old_userfont;
2458 if (--REFCOUNT(data) == 0)
2459 kfree(data - FONT_EXTRA_WORDS * sizeof(int));
2460 }
2461
2462 vc->vc_font.width = old_width;
2463 vc->vc_font.height = old_height;
2464 vc->vc_font.charcount = old_charcount;
2465
2466 return ret;
2467 }
2468
2469 /*
2470 * User asked to set font; we are guaranteed that
2471 * a) width and height are in range 1..32
2472 * b) charcount does not exceed 512
2473 * but lets not assume that, since someone might someday want to use larger
2474 * fonts. And charcount of 512 is small for unicode support.
2475 *
2476 * However, user space gives the font in 32 rows , regardless of
2477 * actual font height. So a new API is needed if support for larger fonts
2478 * is ever implemented.
2479 */
2480
fbcon_set_font(struct vc_data * vc,struct console_font * font,unsigned int flags)2481 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2482 unsigned int flags)
2483 {
2484 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2485 unsigned charcount = font->charcount;
2486 int w = font->width;
2487 int h = font->height;
2488 int size;
2489 int i, csum;
2490 u8 *new_data, *data = font->data;
2491 int pitch = PITCH(font->width);
2492
2493 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2494 * If not this check should be changed to charcount < 256 */
2495 if (charcount != 256 && charcount != 512)
2496 return -EINVAL;
2497
2498 /* font bigger than screen resolution ? */
2499 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
2500 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
2501 return -EINVAL;
2502
2503 if (font->width > 32 || font->height > 32)
2504 return -EINVAL;
2505
2506 /* Make sure drawing engine can handle the font */
2507 if (!(info->pixmap.blit_x & BIT(font->width - 1)) ||
2508 !(info->pixmap.blit_y & BIT(font->height - 1)))
2509 return -EINVAL;
2510
2511 /* Make sure driver can handle the font length */
2512 if (fbcon_invalid_charcount(info, charcount))
2513 return -EINVAL;
2514
2515 size = CALC_FONTSZ(h, pitch, charcount);
2516
2517 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2518
2519 if (!new_data)
2520 return -ENOMEM;
2521
2522 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2523
2524 new_data += FONT_EXTRA_WORDS * sizeof(int);
2525 FNTSIZE(new_data) = size;
2526 REFCOUNT(new_data) = 0; /* usage counter */
2527 for (i=0; i< charcount; i++) {
2528 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2529 }
2530
2531 /* Since linux has a nice crc32 function use it for counting font
2532 * checksums. */
2533 csum = crc32(0, new_data, size);
2534
2535 FNTSUM(new_data) = csum;
2536 /* Check if the same font is on some other console already */
2537 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2538 struct vc_data *tmp = vc_cons[i].d;
2539
2540 if (fb_display[i].userfont &&
2541 fb_display[i].fontdata &&
2542 FNTSUM(fb_display[i].fontdata) == csum &&
2543 FNTSIZE(fb_display[i].fontdata) == size &&
2544 tmp->vc_font.width == w &&
2545 !memcmp(fb_display[i].fontdata, new_data, size)) {
2546 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2547 new_data = (u8 *)fb_display[i].fontdata;
2548 break;
2549 }
2550 }
2551 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2552 }
2553
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,char * name)2554 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2555 {
2556 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2557 const struct font_desc *f;
2558
2559 if (!name)
2560 f = get_default_font(info->var.xres, info->var.yres,
2561 info->pixmap.blit_x, info->pixmap.blit_y);
2562 else if (!(f = find_font(name)))
2563 return -ENOENT;
2564
2565 font->width = f->width;
2566 font->height = f->height;
2567 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2568 }
2569
2570 static u16 palette_red[16];
2571 static u16 palette_green[16];
2572 static u16 palette_blue[16];
2573
2574 static struct fb_cmap palette_cmap = {
2575 0, 16, palette_red, palette_green, palette_blue, NULL
2576 };
2577
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2578 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2579 {
2580 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2581 int i, j, k, depth;
2582 u8 val;
2583
2584 if (fbcon_is_inactive(vc, info))
2585 return;
2586
2587 if (!con_is_visible(vc))
2588 return;
2589
2590 depth = fb_get_color_depth(&info->var, &info->fix);
2591 if (depth > 3) {
2592 for (i = j = 0; i < 16; i++) {
2593 k = table[i];
2594 val = vc->vc_palette[j++];
2595 palette_red[k] = (val << 8) | val;
2596 val = vc->vc_palette[j++];
2597 palette_green[k] = (val << 8) | val;
2598 val = vc->vc_palette[j++];
2599 palette_blue[k] = (val << 8) | val;
2600 }
2601 palette_cmap.len = 16;
2602 palette_cmap.start = 0;
2603 /*
2604 * If framebuffer is capable of less than 16 colors,
2605 * use default palette of fbcon.
2606 */
2607 } else
2608 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2609
2610 fb_set_cmap(&palette_cmap, info);
2611 }
2612
fbcon_screen_pos(const struct vc_data * vc,int offset)2613 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2614 {
2615 return (u16 *) (vc->vc_origin + offset);
2616 }
2617
fbcon_getxy(struct vc_data * vc,unsigned long pos,int * px,int * py)2618 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2619 int *px, int *py)
2620 {
2621 unsigned long ret;
2622 int x, y;
2623
2624 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2625 unsigned long offset = (pos - vc->vc_origin) / 2;
2626
2627 x = offset % vc->vc_cols;
2628 y = offset / vc->vc_cols;
2629 ret = pos + (vc->vc_cols - x) * 2;
2630 } else {
2631 /* Should not happen */
2632 x = y = 0;
2633 ret = vc->vc_origin;
2634 }
2635 if (px)
2636 *px = x;
2637 if (py)
2638 *py = y;
2639 return ret;
2640 }
2641
2642 /* As we might be inside of softback, we may work with non-contiguous buffer,
2643 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2644 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2645 {
2646 while (cnt--) {
2647 u16 a = scr_readw(p);
2648 if (!vc->vc_can_do_color)
2649 a ^= 0x0800;
2650 else if (vc->vc_hi_font_mask == 0x100)
2651 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2652 (((a) & 0x0e00) << 4);
2653 else
2654 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2655 (((a) & 0x0700) << 4);
2656 scr_writew(a, p++);
2657 }
2658 }
2659
fbcon_suspended(struct fb_info * info)2660 void fbcon_suspended(struct fb_info *info)
2661 {
2662 struct vc_data *vc = NULL;
2663 struct fbcon_ops *ops = info->fbcon_par;
2664
2665 if (!ops || ops->currcon < 0)
2666 return;
2667 vc = vc_cons[ops->currcon].d;
2668
2669 /* Clear cursor, restore saved data */
2670 fbcon_cursor(vc, CM_ERASE);
2671 }
2672
fbcon_resumed(struct fb_info * info)2673 void fbcon_resumed(struct fb_info *info)
2674 {
2675 struct vc_data *vc;
2676 struct fbcon_ops *ops = info->fbcon_par;
2677
2678 if (!ops || ops->currcon < 0)
2679 return;
2680 vc = vc_cons[ops->currcon].d;
2681
2682 update_screen(vc);
2683 }
2684
fbcon_modechanged(struct fb_info * info)2685 static void fbcon_modechanged(struct fb_info *info)
2686 {
2687 struct fbcon_ops *ops = info->fbcon_par;
2688 struct vc_data *vc;
2689 struct fbcon_display *p;
2690 int rows, cols;
2691
2692 if (!ops || ops->currcon < 0)
2693 return;
2694 vc = vc_cons[ops->currcon].d;
2695 if (vc->vc_mode != KD_TEXT ||
2696 registered_fb[con2fb_map[ops->currcon]] != info)
2697 return;
2698
2699 p = &fb_display[vc->vc_num];
2700 set_blitting_type(vc, info);
2701
2702 if (con_is_visible(vc)) {
2703 var_to_display(p, &info->var, info);
2704 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2705 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2706 cols /= vc->vc_font.width;
2707 rows /= vc->vc_font.height;
2708 vc_resize(vc, cols, rows);
2709 updatescrollmode(p, info, vc);
2710 scrollback_max = 0;
2711 scrollback_current = 0;
2712
2713 if (!fbcon_is_inactive(vc, info)) {
2714 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2715 ops->update_start(info);
2716 }
2717
2718 fbcon_set_palette(vc, color_table);
2719 update_screen(vc);
2720 }
2721 }
2722
fbcon_set_all_vcs(struct fb_info * info)2723 static void fbcon_set_all_vcs(struct fb_info *info)
2724 {
2725 struct fbcon_ops *ops = info->fbcon_par;
2726 struct vc_data *vc;
2727 struct fbcon_display *p;
2728 int i, rows, cols, fg = -1;
2729
2730 if (!ops || ops->currcon < 0)
2731 return;
2732
2733 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2734 vc = vc_cons[i].d;
2735 if (!vc || vc->vc_mode != KD_TEXT ||
2736 registered_fb[con2fb_map[i]] != info)
2737 continue;
2738
2739 if (con_is_visible(vc)) {
2740 fg = i;
2741 continue;
2742 }
2743
2744 p = &fb_display[vc->vc_num];
2745 set_blitting_type(vc, info);
2746 var_to_display(p, &info->var, info);
2747 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2748 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2749 cols /= vc->vc_font.width;
2750 rows /= vc->vc_font.height;
2751 vc_resize(vc, cols, rows);
2752 }
2753
2754 if (fg != -1)
2755 fbcon_modechanged(info);
2756 }
2757
2758
fbcon_update_vcs(struct fb_info * info,bool all)2759 void fbcon_update_vcs(struct fb_info *info, bool all)
2760 {
2761 if (all)
2762 fbcon_set_all_vcs(info);
2763 else
2764 fbcon_modechanged(info);
2765 }
2766 EXPORT_SYMBOL(fbcon_update_vcs);
2767
2768 /* let fbcon check if it supports a new screen resolution */
fbcon_modechange_possible(struct fb_info * info,struct fb_var_screeninfo * var)2769 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
2770 {
2771 struct fbcon_ops *ops = info->fbcon_par;
2772 struct vc_data *vc;
2773 unsigned int i;
2774
2775 WARN_CONSOLE_UNLOCKED();
2776
2777 if (!ops)
2778 return 0;
2779
2780 /* prevent setting a screen size which is smaller than font size */
2781 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2782 vc = vc_cons[i].d;
2783 if (!vc || vc->vc_mode != KD_TEXT ||
2784 registered_fb[con2fb_map[i]] != info)
2785 continue;
2786
2787 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
2788 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
2789 return -EINVAL;
2790 }
2791
2792 return 0;
2793 }
2794 EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
2795
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2796 int fbcon_mode_deleted(struct fb_info *info,
2797 struct fb_videomode *mode)
2798 {
2799 struct fb_info *fb_info;
2800 struct fbcon_display *p;
2801 int i, j, found = 0;
2802
2803 /* before deletion, ensure that mode is not in use */
2804 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2805 j = con2fb_map[i];
2806 if (j == -1)
2807 continue;
2808 fb_info = registered_fb[j];
2809 if (fb_info != info)
2810 continue;
2811 p = &fb_display[i];
2812 if (!p || !p->mode)
2813 continue;
2814 if (fb_mode_is_equal(p->mode, mode)) {
2815 found = 1;
2816 break;
2817 }
2818 }
2819 return found;
2820 }
2821
2822 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2823 static void fbcon_unbind(void)
2824 {
2825 int ret;
2826
2827 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2828 fbcon_is_default);
2829
2830 if (!ret)
2831 fbcon_has_console_bind = 0;
2832 }
2833 #else
fbcon_unbind(void)2834 static inline void fbcon_unbind(void) {}
2835 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2836
2837 /* called with console_lock held */
fbcon_fb_unbind(struct fb_info * info)2838 void fbcon_fb_unbind(struct fb_info *info)
2839 {
2840 int i, new_idx = -1, ret = 0;
2841 int idx = info->node;
2842
2843 WARN_CONSOLE_UNLOCKED();
2844
2845 if (!fbcon_has_console_bind)
2846 return;
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 = 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 ret = con2fb_release_oldinfo(vc_cons[i].d,
2875 info, NULL, i,
2876 idx, 0);
2877 if (ret) {
2878 con2fb_map[i] = idx;
2879 return;
2880 }
2881 }
2882 }
2883 }
2884 fbcon_unbind();
2885 }
2886 }
2887
2888 /* called with console_lock held */
fbcon_fb_unregistered(struct fb_info * info)2889 void fbcon_fb_unregistered(struct fb_info *info)
2890 {
2891 int i, idx;
2892
2893 WARN_CONSOLE_UNLOCKED();
2894
2895 if (deferred_takeover)
2896 return;
2897
2898 idx = info->node;
2899 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2900 if (con2fb_map[i] == idx)
2901 con2fb_map[i] = -1;
2902 }
2903
2904 if (idx == info_idx) {
2905 info_idx = -1;
2906
2907 for_each_registered_fb(i) {
2908 info_idx = i;
2909 break;
2910 }
2911 }
2912
2913 if (info_idx != -1) {
2914 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2915 if (con2fb_map[i] == -1)
2916 con2fb_map[i] = info_idx;
2917 }
2918 }
2919
2920 if (primary_device == idx)
2921 primary_device = -1;
2922
2923 if (!num_registered_fb)
2924 do_unregister_con_driver(&fb_con);
2925 }
2926
fbcon_remap_all(struct fb_info * info)2927 void fbcon_remap_all(struct fb_info *info)
2928 {
2929 int i, idx = info->node;
2930
2931 console_lock();
2932 if (deferred_takeover) {
2933 for (i = first_fb_vc; i <= last_fb_vc; i++)
2934 con2fb_map_boot[i] = idx;
2935 fbcon_map_override();
2936 console_unlock();
2937 return;
2938 }
2939
2940 for (i = first_fb_vc; i <= last_fb_vc; i++)
2941 set_con2fb_map(i, idx, 0);
2942
2943 if (con_is_bound(&fb_con)) {
2944 printk(KERN_INFO "fbcon: Remapping primary device, "
2945 "fb%i, to tty %i-%i\n", idx,
2946 first_fb_vc + 1, last_fb_vc + 1);
2947 info_idx = idx;
2948 }
2949 console_unlock();
2950 }
2951
2952 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2953 static void fbcon_select_primary(struct fb_info *info)
2954 {
2955 if (!map_override && primary_device == -1 &&
2956 fb_is_primary_device(info)) {
2957 int i;
2958
2959 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2960 info->fix.id, info->node);
2961 primary_device = info->node;
2962
2963 for (i = first_fb_vc; i <= last_fb_vc; i++)
2964 con2fb_map_boot[i] = primary_device;
2965
2966 if (con_is_bound(&fb_con)) {
2967 printk(KERN_INFO "fbcon: Remapping primary device, "
2968 "fb%i, to tty %i-%i\n", info->node,
2969 first_fb_vc + 1, last_fb_vc + 1);
2970 info_idx = primary_device;
2971 }
2972 }
2973
2974 }
2975 #else
fbcon_select_primary(struct fb_info * info)2976 static inline void fbcon_select_primary(struct fb_info *info)
2977 {
2978 return;
2979 }
2980 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2981
2982 /* called with console_lock held */
fbcon_fb_registered(struct fb_info * info)2983 int fbcon_fb_registered(struct fb_info *info)
2984 {
2985 int ret = 0, i, idx;
2986
2987 WARN_CONSOLE_UNLOCKED();
2988
2989 idx = info->node;
2990 fbcon_select_primary(info);
2991
2992 if (deferred_takeover) {
2993 pr_info("fbcon: Deferring console take-over\n");
2994 return 0;
2995 }
2996
2997 if (info_idx == -1) {
2998 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2999 if (con2fb_map_boot[i] == idx) {
3000 info_idx = idx;
3001 break;
3002 }
3003 }
3004
3005 if (info_idx != -1)
3006 ret = do_fbcon_takeover(1);
3007 } else {
3008 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3009 if (con2fb_map_boot[i] == idx)
3010 set_con2fb_map(i, idx, 0);
3011 }
3012 }
3013
3014 return ret;
3015 }
3016
fbcon_fb_blanked(struct fb_info * info,int blank)3017 void fbcon_fb_blanked(struct fb_info *info, int blank)
3018 {
3019 struct fbcon_ops *ops = info->fbcon_par;
3020 struct vc_data *vc;
3021
3022 if (!ops || ops->currcon < 0)
3023 return;
3024
3025 vc = vc_cons[ops->currcon].d;
3026 if (vc->vc_mode != KD_TEXT ||
3027 registered_fb[con2fb_map[ops->currcon]] != info)
3028 return;
3029
3030 if (con_is_visible(vc)) {
3031 if (blank)
3032 do_blank_screen(0);
3033 else
3034 do_unblank_screen(0);
3035 }
3036 ops->blank_state = blank;
3037 }
3038
fbcon_new_modelist(struct fb_info * info)3039 void fbcon_new_modelist(struct fb_info *info)
3040 {
3041 int i;
3042 struct vc_data *vc;
3043 struct fb_var_screeninfo var;
3044 const struct fb_videomode *mode;
3045
3046 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3047 if (registered_fb[con2fb_map[i]] != info)
3048 continue;
3049 if (!fb_display[i].mode)
3050 continue;
3051 vc = vc_cons[i].d;
3052 display_to_var(&var, &fb_display[i]);
3053 mode = fb_find_nearest_mode(fb_display[i].mode,
3054 &info->modelist);
3055 fb_videomode_to_var(&var, mode);
3056 fbcon_set_disp(info, &var, vc->vc_num);
3057 }
3058 }
3059
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)3060 void fbcon_get_requirement(struct fb_info *info,
3061 struct fb_blit_caps *caps)
3062 {
3063 struct vc_data *vc;
3064
3065 if (caps->flags) {
3066 int i, charcnt;
3067
3068 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3069 vc = vc_cons[i].d;
3070 if (vc && vc->vc_mode == KD_TEXT &&
3071 info->node == con2fb_map[i]) {
3072 caps->x |= 1 << (vc->vc_font.width - 1);
3073 caps->y |= 1 << (vc->vc_font.height - 1);
3074 charcnt = vc->vc_font.charcount;
3075 if (caps->len < charcnt)
3076 caps->len = charcnt;
3077 }
3078 }
3079 } else {
3080 vc = vc_cons[fg_console].d;
3081
3082 if (vc && vc->vc_mode == KD_TEXT &&
3083 info->node == con2fb_map[fg_console]) {
3084 caps->x = 1 << (vc->vc_font.width - 1);
3085 caps->y = 1 << (vc->vc_font.height - 1);
3086 caps->len = vc->vc_font.charcount;
3087 }
3088 }
3089 }
3090
fbcon_set_con2fb_map_ioctl(void __user * argp)3091 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3092 {
3093 struct fb_con2fbmap con2fb;
3094 int ret;
3095
3096 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3097 return -EFAULT;
3098 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3099 return -EINVAL;
3100 if (con2fb.framebuffer >= FB_MAX)
3101 return -EINVAL;
3102 if (!registered_fb[con2fb.framebuffer])
3103 request_module("fb%d", con2fb.framebuffer);
3104 if (!registered_fb[con2fb.framebuffer]) {
3105 return -EINVAL;
3106 }
3107
3108 console_lock();
3109 ret = set_con2fb_map(con2fb.console - 1,
3110 con2fb.framebuffer, 1);
3111 console_unlock();
3112
3113 return ret;
3114 }
3115
fbcon_get_con2fb_map_ioctl(void __user * argp)3116 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3117 {
3118 struct fb_con2fbmap con2fb;
3119
3120 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3121 return -EFAULT;
3122 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3123 return -EINVAL;
3124
3125 console_lock();
3126 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3127 console_unlock();
3128
3129 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3130 }
3131
3132 /*
3133 * The console `switch' structure for the frame buffer based console
3134 */
3135
3136 static const struct consw fb_con = {
3137 .owner = THIS_MODULE,
3138 .con_startup = fbcon_startup,
3139 .con_init = fbcon_init,
3140 .con_deinit = fbcon_deinit,
3141 .con_clear = fbcon_clear,
3142 .con_putc = fbcon_putc,
3143 .con_putcs = fbcon_putcs,
3144 .con_cursor = fbcon_cursor,
3145 .con_scroll = fbcon_scroll,
3146 .con_switch = fbcon_switch,
3147 .con_blank = fbcon_blank,
3148 .con_font_set = fbcon_set_font,
3149 .con_font_get = fbcon_get_font,
3150 .con_font_default = fbcon_set_def_font,
3151 .con_set_palette = fbcon_set_palette,
3152 .con_invert_region = fbcon_invert_region,
3153 .con_screen_pos = fbcon_screen_pos,
3154 .con_getxy = fbcon_getxy,
3155 .con_resize = fbcon_resize,
3156 .con_debug_enter = fbcon_debug_enter,
3157 .con_debug_leave = fbcon_debug_leave,
3158 };
3159
store_rotate(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3160 static ssize_t store_rotate(struct device *device,
3161 struct device_attribute *attr, const char *buf,
3162 size_t count)
3163 {
3164 struct fb_info *info;
3165 int rotate, idx;
3166 char **last = NULL;
3167
3168 console_lock();
3169 idx = con2fb_map[fg_console];
3170
3171 if (idx == -1 || registered_fb[idx] == NULL)
3172 goto err;
3173
3174 info = registered_fb[idx];
3175 rotate = simple_strtoul(buf, last, 0);
3176 fbcon_rotate(info, rotate);
3177 err:
3178 console_unlock();
3179 return count;
3180 }
3181
store_rotate_all(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3182 static ssize_t store_rotate_all(struct device *device,
3183 struct device_attribute *attr,const char *buf,
3184 size_t count)
3185 {
3186 struct fb_info *info;
3187 int rotate, idx;
3188 char **last = NULL;
3189
3190 console_lock();
3191 idx = con2fb_map[fg_console];
3192
3193 if (idx == -1 || registered_fb[idx] == NULL)
3194 goto err;
3195
3196 info = registered_fb[idx];
3197 rotate = simple_strtoul(buf, last, 0);
3198 fbcon_rotate_all(info, rotate);
3199 err:
3200 console_unlock();
3201 return count;
3202 }
3203
show_rotate(struct device * device,struct device_attribute * attr,char * buf)3204 static ssize_t show_rotate(struct device *device,
3205 struct device_attribute *attr,char *buf)
3206 {
3207 struct fb_info *info;
3208 int rotate = 0, idx;
3209
3210 console_lock();
3211 idx = con2fb_map[fg_console];
3212
3213 if (idx == -1 || registered_fb[idx] == NULL)
3214 goto err;
3215
3216 info = registered_fb[idx];
3217 rotate = fbcon_get_rotate(info);
3218 err:
3219 console_unlock();
3220 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3221 }
3222
show_cursor_blink(struct device * device,struct device_attribute * attr,char * buf)3223 static ssize_t show_cursor_blink(struct device *device,
3224 struct device_attribute *attr, char *buf)
3225 {
3226 struct fb_info *info;
3227 struct fbcon_ops *ops;
3228 int idx, blink = -1;
3229
3230 console_lock();
3231 idx = con2fb_map[fg_console];
3232
3233 if (idx == -1 || registered_fb[idx] == NULL)
3234 goto err;
3235
3236 info = registered_fb[idx];
3237 ops = info->fbcon_par;
3238
3239 if (!ops)
3240 goto err;
3241
3242 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3243 err:
3244 console_unlock();
3245 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3246 }
3247
store_cursor_blink(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3248 static ssize_t store_cursor_blink(struct device *device,
3249 struct device_attribute *attr,
3250 const char *buf, size_t count)
3251 {
3252 struct fb_info *info;
3253 int blink, idx;
3254 char **last = NULL;
3255
3256 console_lock();
3257 idx = con2fb_map[fg_console];
3258
3259 if (idx == -1 || registered_fb[idx] == NULL)
3260 goto err;
3261
3262 info = registered_fb[idx];
3263
3264 if (!info->fbcon_par)
3265 goto err;
3266
3267 blink = simple_strtoul(buf, last, 0);
3268
3269 if (blink) {
3270 fbcon_cursor_noblink = 0;
3271 fbcon_add_cursor_timer(info);
3272 } else {
3273 fbcon_cursor_noblink = 1;
3274 fbcon_del_cursor_timer(info);
3275 }
3276
3277 err:
3278 console_unlock();
3279 return count;
3280 }
3281
3282 static struct device_attribute device_attrs[] = {
3283 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3284 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3285 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3286 store_cursor_blink),
3287 };
3288
fbcon_init_device(void)3289 static int fbcon_init_device(void)
3290 {
3291 int i, error = 0;
3292
3293 fbcon_has_sysfs = 1;
3294
3295 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3296 error = device_create_file(fbcon_device, &device_attrs[i]);
3297
3298 if (error)
3299 break;
3300 }
3301
3302 if (error) {
3303 while (--i >= 0)
3304 device_remove_file(fbcon_device, &device_attrs[i]);
3305
3306 fbcon_has_sysfs = 0;
3307 }
3308
3309 return 0;
3310 }
3311
3312 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3313 static void fbcon_register_existing_fbs(struct work_struct *work)
3314 {
3315 int i;
3316
3317 console_lock();
3318
3319 deferred_takeover = false;
3320 logo_shown = FBCON_LOGO_DONTSHOW;
3321
3322 for_each_registered_fb(i)
3323 fbcon_fb_registered(registered_fb[i]);
3324
3325 console_unlock();
3326 }
3327
3328 static struct notifier_block fbcon_output_nb;
3329 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3330
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3331 static int fbcon_output_notifier(struct notifier_block *nb,
3332 unsigned long action, void *data)
3333 {
3334 WARN_CONSOLE_UNLOCKED();
3335
3336 pr_info("fbcon: Taking over console\n");
3337
3338 dummycon_unregister_output_notifier(&fbcon_output_nb);
3339
3340 /* We may get called in atomic context */
3341 schedule_work(&fbcon_deferred_takeover_work);
3342
3343 return NOTIFY_OK;
3344 }
3345 #endif
3346
fbcon_start(void)3347 static void fbcon_start(void)
3348 {
3349 WARN_CONSOLE_UNLOCKED();
3350
3351 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3352 if (conswitchp != &dummy_con)
3353 deferred_takeover = false;
3354
3355 if (deferred_takeover) {
3356 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3357 dummycon_register_output_notifier(&fbcon_output_nb);
3358 return;
3359 }
3360 #endif
3361
3362 if (num_registered_fb) {
3363 int i;
3364
3365 for_each_registered_fb(i) {
3366 info_idx = i;
3367 break;
3368 }
3369
3370 do_fbcon_takeover(0);
3371 }
3372 }
3373
fbcon_exit(void)3374 static void fbcon_exit(void)
3375 {
3376 struct fb_info *info;
3377 int i, j, mapped;
3378
3379 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3380 if (deferred_takeover) {
3381 dummycon_unregister_output_notifier(&fbcon_output_nb);
3382 deferred_takeover = false;
3383 }
3384 #endif
3385
3386 for_each_registered_fb(i) {
3387 int pending = 0;
3388
3389 mapped = 0;
3390 info = registered_fb[i];
3391
3392 if (info->queue.func)
3393 pending = cancel_work_sync(&info->queue);
3394 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no"));
3395
3396 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3397 if (con2fb_map[j] == i) {
3398 mapped = 1;
3399 con2fb_map[j] = -1;
3400 }
3401 }
3402
3403 if (mapped) {
3404 if (info->fbops->fb_release)
3405 info->fbops->fb_release(info, 0);
3406 module_put(info->fbops->owner);
3407
3408 if (info->fbcon_par) {
3409 struct fbcon_ops *ops = info->fbcon_par;
3410
3411 fbcon_del_cursor_timer(info);
3412 kfree(ops->cursor_src);
3413 kfree(ops->cursor_state.mask);
3414 kfree(info->fbcon_par);
3415 info->fbcon_par = NULL;
3416 }
3417
3418 if (info->queue.func == fb_flashcursor)
3419 info->queue.func = NULL;
3420 }
3421 }
3422 }
3423
fb_console_init(void)3424 void __init fb_console_init(void)
3425 {
3426 int i;
3427
3428 console_lock();
3429 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3430 "fbcon");
3431
3432 if (IS_ERR(fbcon_device)) {
3433 printk(KERN_WARNING "Unable to create device "
3434 "for fbcon; errno = %ld\n",
3435 PTR_ERR(fbcon_device));
3436 fbcon_device = NULL;
3437 } else
3438 fbcon_init_device();
3439
3440 for (i = 0; i < MAX_NR_CONSOLES; i++)
3441 con2fb_map[i] = -1;
3442
3443 fbcon_start();
3444 console_unlock();
3445 }
3446
3447 #ifdef MODULE
3448
fbcon_deinit_device(void)3449 static void __exit fbcon_deinit_device(void)
3450 {
3451 int i;
3452
3453 if (fbcon_has_sysfs) {
3454 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3455 device_remove_file(fbcon_device, &device_attrs[i]);
3456
3457 fbcon_has_sysfs = 0;
3458 }
3459 }
3460
fb_console_exit(void)3461 void __exit fb_console_exit(void)
3462 {
3463 console_lock();
3464 fbcon_deinit_device();
3465 device_destroy(fb_class, MKDEV(0, 0));
3466 fbcon_exit();
3467 do_unregister_con_driver(&fb_con);
3468 console_unlock();
3469 }
3470 #endif
3471