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 int first_fb_vc;
119 static 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 < 0)
468 first_fb_vc = 0;
469 if (*options++ == '-')
470 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
471 fbcon_is_default = 0;
472 continue;
473 }
474
475 if (!strncmp(options, "rotate:", 7)) {
476 options += 7;
477 if (*options)
478 initial_rotation = simple_strtoul(options, &options, 0);
479 if (initial_rotation > 3)
480 initial_rotation = 0;
481 continue;
482 }
483
484 if (!strncmp(options, "margin:", 7)) {
485 options += 7;
486 if (*options)
487 margin_color = simple_strtoul(options, &options, 0);
488 continue;
489 }
490 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
491 if (!strcmp(options, "nodefer")) {
492 deferred_takeover = false;
493 continue;
494 }
495 #endif
496
497 if (!strncmp(options, "logo-pos:", 9)) {
498 options += 9;
499 if (!strcmp(options, "center"))
500 fb_center_logo = true;
501 continue;
502 }
503
504 if (!strncmp(options, "logo-count:", 11)) {
505 options += 11;
506 if (*options)
507 fb_logo_count = simple_strtol(options, &options, 0);
508 continue;
509 }
510 }
511 return 1;
512 }
513
514 __setup("fbcon=", fb_console_setup);
515 #endif
516
search_fb_in_map(int idx)517 static int search_fb_in_map(int idx)
518 {
519 int i, retval = 0;
520
521 for (i = first_fb_vc; i <= last_fb_vc; i++) {
522 if (con2fb_map[i] == idx)
523 retval = 1;
524 }
525 return retval;
526 }
527
search_for_mapped_con(void)528 static int search_for_mapped_con(void)
529 {
530 int i, retval = 0;
531
532 for (i = first_fb_vc; i <= last_fb_vc; i++) {
533 if (con2fb_map[i] != -1)
534 retval = 1;
535 }
536 return retval;
537 }
538
do_fbcon_takeover(int show_logo)539 static int do_fbcon_takeover(int show_logo)
540 {
541 int err, i;
542
543 if (!num_registered_fb)
544 return -ENODEV;
545
546 if (!show_logo)
547 logo_shown = FBCON_LOGO_DONTSHOW;
548
549 for (i = first_fb_vc; i <= last_fb_vc; i++)
550 con2fb_map[i] = info_idx;
551
552 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
553 fbcon_is_default);
554
555 if (err) {
556 for (i = first_fb_vc; i <= last_fb_vc; i++)
557 con2fb_map[i] = -1;
558 info_idx = -1;
559 } else {
560 fbcon_has_console_bind = 1;
561 }
562
563 return err;
564 }
565
566 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)567 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
568 int cols, int rows, int new_cols, int new_rows)
569 {
570 logo_shown = FBCON_LOGO_DONTSHOW;
571 }
572 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)573 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
574 int cols, int rows, int new_cols, int new_rows)
575 {
576 /* Need to make room for the logo */
577 struct fbcon_ops *ops = info->fbcon_par;
578 int cnt, erase = vc->vc_video_erase_char, step;
579 unsigned short *save = NULL, *r, *q;
580 int logo_height;
581
582 if (info->fbops->owner) {
583 logo_shown = FBCON_LOGO_DONTSHOW;
584 return;
585 }
586
587 /*
588 * remove underline attribute from erase character
589 * if black and white framebuffer.
590 */
591 if (fb_get_color_depth(&info->var, &info->fix) == 1)
592 erase &= ~0x400;
593 logo_height = fb_prepare_logo(info, ops->rotate);
594 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
595 q = (unsigned short *) (vc->vc_origin +
596 vc->vc_size_row * rows);
597 step = logo_lines * cols;
598 for (r = q - logo_lines * cols; r < q; r++)
599 if (scr_readw(r) != vc->vc_video_erase_char)
600 break;
601 if (r != q && new_rows >= rows + logo_lines) {
602 save = kmalloc(array3_size(logo_lines, new_cols, 2),
603 GFP_KERNEL);
604 if (save) {
605 int i = cols < new_cols ? cols : new_cols;
606 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
607 r = q - step;
608 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
609 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
610 r = q;
611 }
612 }
613 if (r == q) {
614 /* We can scroll screen down */
615 r = q - step - cols;
616 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
617 scr_memcpyw(r + step, r, vc->vc_size_row);
618 r -= cols;
619 }
620 if (!save) {
621 int lines;
622 if (vc->state.y + logo_lines >= rows)
623 lines = rows - vc->state.y - 1;
624 else
625 lines = logo_lines;
626 vc->state.y += lines;
627 vc->vc_pos += lines * vc->vc_size_row;
628 }
629 }
630 scr_memsetw((unsigned short *) vc->vc_origin,
631 erase,
632 vc->vc_size_row * logo_lines);
633
634 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
635 fbcon_clear_margins(vc, 0);
636 update_screen(vc);
637 }
638
639 if (save) {
640 q = (unsigned short *) (vc->vc_origin +
641 vc->vc_size_row *
642 rows);
643 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
644 vc->state.y += logo_lines;
645 vc->vc_pos += logo_lines * vc->vc_size_row;
646 kfree(save);
647 }
648
649 if (logo_shown == FBCON_LOGO_DONTSHOW)
650 return;
651
652 if (logo_lines > vc->vc_bottom) {
653 logo_shown = FBCON_LOGO_CANSHOW;
654 printk(KERN_INFO
655 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
656 } else {
657 logo_shown = FBCON_LOGO_DRAW;
658 vc->vc_top = logo_lines;
659 }
660 }
661 #endif /* MODULE */
662
663 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
665 {
666 struct fbcon_ops *ops = info->fbcon_par;
667
668 ops->p = &fb_display[vc->vc_num];
669
670 if ((info->flags & FBINFO_MISC_TILEBLITTING))
671 fbcon_set_tileops(vc, info);
672 else {
673 fbcon_set_rotation(info);
674 fbcon_set_bitops(ops);
675 }
676 }
677
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
679 {
680 int err = 0;
681
682 if (info->flags & FBINFO_MISC_TILEBLITTING &&
683 info->tileops->fb_get_tilemax(info) < charcount)
684 err = 1;
685
686 return err;
687 }
688 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
690 {
691 struct fbcon_ops *ops = info->fbcon_par;
692
693 info->flags &= ~FBINFO_MISC_TILEBLITTING;
694 ops->p = &fb_display[vc->vc_num];
695 fbcon_set_rotation(info);
696 fbcon_set_bitops(ops);
697 }
698
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
700 {
701 return 0;
702 }
703
704 #endif /* CONFIG_MISC_TILEBLITTING */
705
706
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit,int oldidx)707 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
708 int unit, int oldidx)
709 {
710 struct fbcon_ops *ops = NULL;
711 int err = 0;
712
713 if (!try_module_get(info->fbops->owner))
714 err = -ENODEV;
715
716 if (!err && info->fbops->fb_open &&
717 info->fbops->fb_open(info, 0))
718 err = -ENODEV;
719
720 if (!err) {
721 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
722 if (!ops)
723 err = -ENOMEM;
724 }
725
726 if (!err) {
727 ops->cur_blink_jiffies = HZ / 5;
728 ops->info = info;
729 info->fbcon_par = ops;
730
731 if (vc)
732 set_blitting_type(vc, info);
733 }
734
735 if (err) {
736 con2fb_map[unit] = oldidx;
737 module_put(info->fbops->owner);
738 }
739
740 return err;
741 }
742
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo,int unit,int oldidx,int found)743 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
744 struct fb_info *newinfo, int unit,
745 int oldidx, int found)
746 {
747 struct fbcon_ops *ops = oldinfo->fbcon_par;
748 int err = 0, ret;
749
750 if (oldinfo->fbops->fb_release &&
751 oldinfo->fbops->fb_release(oldinfo, 0)) {
752 con2fb_map[unit] = oldidx;
753 if (!found && newinfo->fbops->fb_release)
754 newinfo->fbops->fb_release(newinfo, 0);
755 if (!found)
756 module_put(newinfo->fbops->owner);
757 err = -ENODEV;
758 }
759
760 if (!err) {
761 fbcon_del_cursor_timer(oldinfo);
762 kfree(ops->cursor_state.mask);
763 kfree(ops->cursor_data);
764 kfree(ops->cursor_src);
765 kfree(ops->fontbuffer);
766 kfree(oldinfo->fbcon_par);
767 oldinfo->fbcon_par = NULL;
768 module_put(oldinfo->fbops->owner);
769 /*
770 If oldinfo and newinfo are driving the same hardware,
771 the fb_release() method of oldinfo may attempt to
772 restore the hardware state. This will leave the
773 newinfo in an undefined state. Thus, a call to
774 fb_set_par() may be needed for the newinfo.
775 */
776 if (newinfo && newinfo->fbops->fb_set_par) {
777 ret = newinfo->fbops->fb_set_par(newinfo);
778
779 if (ret)
780 printk(KERN_ERR "con2fb_release_oldinfo: "
781 "detected unhandled fb_set_par error, "
782 "error code %d\n", ret);
783 }
784 }
785
786 return err;
787 }
788
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
790 int unit, int show_logo)
791 {
792 struct fbcon_ops *ops = info->fbcon_par;
793 int ret;
794
795 ops->currcon = fg_console;
796
797 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
798 ret = info->fbops->fb_set_par(info);
799
800 if (ret)
801 printk(KERN_ERR "con2fb_init_display: detected "
802 "unhandled fb_set_par error, "
803 "error code %d\n", ret);
804 }
805
806 ops->flags |= FBCON_FLAGS_INIT;
807 ops->graphics = 0;
808 fbcon_set_disp(info, &info->var, unit);
809
810 if (show_logo) {
811 struct vc_data *fg_vc = vc_cons[fg_console].d;
812 struct fb_info *fg_info =
813 registered_fb[con2fb_map[fg_console]];
814
815 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
816 fg_vc->vc_rows, fg_vc->vc_cols,
817 fg_vc->vc_rows);
818 }
819
820 update_screen(vc_cons[fg_console].d);
821 }
822
823 /**
824 * set_con2fb_map - map console to frame buffer device
825 * @unit: virtual console number to map
826 * @newidx: frame buffer index to map virtual console to
827 * @user: user request
828 *
829 * Maps a virtual console @unit to a frame buffer device
830 * @newidx.
831 *
832 * This should be called with the console lock held.
833 */
set_con2fb_map(int unit,int newidx,int user)834 static int set_con2fb_map(int unit, int newidx, int user)
835 {
836 struct vc_data *vc = vc_cons[unit].d;
837 int oldidx = con2fb_map[unit];
838 struct fb_info *info = registered_fb[newidx];
839 struct fb_info *oldinfo = NULL;
840 int found, err = 0;
841
842 WARN_CONSOLE_UNLOCKED();
843
844 if (oldidx == newidx)
845 return 0;
846
847 if (!info)
848 return -EINVAL;
849
850 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
851 info_idx = newidx;
852 return do_fbcon_takeover(0);
853 }
854
855 if (oldidx != -1)
856 oldinfo = registered_fb[oldidx];
857
858 found = search_fb_in_map(newidx);
859
860 con2fb_map[unit] = newidx;
861 if (!err && !found)
862 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
863
864 /*
865 * If old fb is not mapped to any of the consoles,
866 * fbcon should release it.
867 */
868 if (!err && oldinfo && !search_fb_in_map(oldidx))
869 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
870 found);
871
872 if (!err) {
873 int show_logo = (fg_console == 0 && !user &&
874 logo_shown != FBCON_LOGO_DONTSHOW);
875
876 if (!found)
877 fbcon_add_cursor_timer(info);
878 con2fb_map_boot[unit] = newidx;
879 con2fb_init_display(vc, info, unit, show_logo);
880 }
881
882 if (!search_fb_in_map(info_idx))
883 info_idx = newidx;
884
885 return err;
886 }
887
888 /*
889 * Low Level Operations
890 */
891 /* 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)892 static int var_to_display(struct fbcon_display *disp,
893 struct fb_var_screeninfo *var,
894 struct fb_info *info)
895 {
896 disp->xres_virtual = var->xres_virtual;
897 disp->yres_virtual = var->yres_virtual;
898 disp->bits_per_pixel = var->bits_per_pixel;
899 disp->grayscale = var->grayscale;
900 disp->nonstd = var->nonstd;
901 disp->accel_flags = var->accel_flags;
902 disp->height = var->height;
903 disp->width = var->width;
904 disp->red = var->red;
905 disp->green = var->green;
906 disp->blue = var->blue;
907 disp->transp = var->transp;
908 disp->rotate = var->rotate;
909 disp->mode = fb_match_mode(var, &info->modelist);
910 if (disp->mode == NULL)
911 /* This should not happen */
912 return -EINVAL;
913 return 0;
914 }
915
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)916 static void display_to_var(struct fb_var_screeninfo *var,
917 struct fbcon_display *disp)
918 {
919 fb_videomode_to_var(var, disp->mode);
920 var->xres_virtual = disp->xres_virtual;
921 var->yres_virtual = disp->yres_virtual;
922 var->bits_per_pixel = disp->bits_per_pixel;
923 var->grayscale = disp->grayscale;
924 var->nonstd = disp->nonstd;
925 var->accel_flags = disp->accel_flags;
926 var->height = disp->height;
927 var->width = disp->width;
928 var->red = disp->red;
929 var->green = disp->green;
930 var->blue = disp->blue;
931 var->transp = disp->transp;
932 var->rotate = disp->rotate;
933 }
934
fbcon_startup(void)935 static const char *fbcon_startup(void)
936 {
937 const char *display_desc = "frame buffer device";
938 struct fbcon_display *p = &fb_display[fg_console];
939 struct vc_data *vc = vc_cons[fg_console].d;
940 const struct font_desc *font = NULL;
941 struct module *owner;
942 struct fb_info *info = NULL;
943 struct fbcon_ops *ops;
944 int rows, cols;
945
946 /*
947 * If num_registered_fb is zero, this is a call for the dummy part.
948 * The frame buffer devices weren't initialized yet.
949 */
950 if (!num_registered_fb || info_idx == -1)
951 return display_desc;
952 /*
953 * Instead of blindly using registered_fb[0], we use info_idx, set by
954 * fb_console_init();
955 */
956 info = registered_fb[info_idx];
957 if (!info)
958 return NULL;
959
960 owner = info->fbops->owner;
961 if (!try_module_get(owner))
962 return NULL;
963 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
964 module_put(owner);
965 return NULL;
966 }
967
968 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
969 if (!ops) {
970 module_put(owner);
971 return NULL;
972 }
973
974 ops->currcon = -1;
975 ops->graphics = 1;
976 ops->cur_rotate = -1;
977 ops->cur_blink_jiffies = HZ / 5;
978 ops->info = info;
979 info->fbcon_par = ops;
980
981 p->con_rotate = initial_rotation;
982 if (p->con_rotate == -1)
983 p->con_rotate = info->fbcon_rotate_hint;
984 if (p->con_rotate == -1)
985 p->con_rotate = FB_ROTATE_UR;
986
987 set_blitting_type(vc, info);
988
989 /* Setup default font */
990 if (!p->fontdata && !vc->vc_font.data) {
991 if (!fontname[0] || !(font = find_font(fontname)))
992 font = get_default_font(info->var.xres,
993 info->var.yres,
994 info->pixmap.blit_x,
995 info->pixmap.blit_y);
996 vc->vc_font.width = font->width;
997 vc->vc_font.height = font->height;
998 vc->vc_font.data = (void *)(p->fontdata = font->data);
999 vc->vc_font.charcount = font->charcount;
1000 } else {
1001 p->fontdata = vc->vc_font.data;
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 /*
1139 * No more hw acceleration for fbcon.
1140 *
1141 * FIXME: Garbage collect all the now dead code after sufficient time
1142 * has passed.
1143 */
1144 p->scrollmode = SCROLL_REDRAW;
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,bool freefont)1168 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1169 {
1170 if (freefont && 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 bool free_font = true;
1185
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 if (info->flags & FBINFO_MISC_FIRMWARE)
1197 free_font = false;
1198 ops = info->fbcon_par;
1199
1200 if (!ops)
1201 goto finished;
1202
1203 if (con_is_visible(vc))
1204 fbcon_del_cursor_timer(info);
1205
1206 ops->flags &= ~FBCON_FLAGS_INIT;
1207 finished:
1208
1209 fbcon_free_font(p, free_font);
1210 if (free_font)
1211 vc->vc_font.data = NULL;
1212
1213 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1214 set_vc_hi_font(vc, false);
1215
1216 if (!con_is_bound(&fb_con))
1217 fbcon_exit();
1218
1219 if (vc->vc_num == logo_shown)
1220 logo_shown = FBCON_LOGO_CANSHOW;
1221
1222 return;
1223 }
1224
1225 /* ====================================================================== */
1226
1227 /* fbcon_XXX routines - interface used by the world
1228 *
1229 * This system is now divided into two levels because of complications
1230 * caused by hardware scrolling. Top level functions:
1231 *
1232 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1233 *
1234 * handles y values in range [0, scr_height-1] that correspond to real
1235 * screen positions. y_wrap shift means that first line of bitmap may be
1236 * anywhere on this display. These functions convert lineoffsets to
1237 * bitmap offsets and deal with the wrap-around case by splitting blits.
1238 *
1239 * fbcon_bmove_physical_8() -- These functions fast implementations
1240 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1241 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1242 *
1243 * WARNING:
1244 *
1245 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1246 * Implies should only really hardware scroll in rows. Only reason for
1247 * restriction is simplicity & efficiency at the moment.
1248 */
1249
fbcon_clear(struct vc_data * vc,int sy,int sx,int height,int width)1250 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1251 int width)
1252 {
1253 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1254 struct fbcon_ops *ops = info->fbcon_par;
1255
1256 struct fbcon_display *p = &fb_display[vc->vc_num];
1257 u_int y_break;
1258
1259 if (fbcon_is_inactive(vc, info))
1260 return;
1261
1262 if (!height || !width)
1263 return;
1264
1265 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1266 vc->vc_top = 0;
1267 /*
1268 * If the font dimensions are not an integral of the display
1269 * dimensions then the ops->clear below won't end up clearing
1270 * the margins. Call clear_margins here in case the logo
1271 * bitmap stretched into the margin area.
1272 */
1273 fbcon_clear_margins(vc, 0);
1274 }
1275
1276 /* Split blits that cross physical y_wrap boundary */
1277
1278 y_break = p->vrows - p->yscroll;
1279 if (sy < y_break && sy + height - 1 >= y_break) {
1280 u_int b = y_break - sy;
1281 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1282 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1283 width);
1284 } else
1285 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1286 }
1287
fbcon_putcs(struct vc_data * vc,const unsigned short * s,int count,int ypos,int xpos)1288 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1289 int count, int ypos, int xpos)
1290 {
1291 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1292 struct fbcon_display *p = &fb_display[vc->vc_num];
1293 struct fbcon_ops *ops = info->fbcon_par;
1294
1295 if (!fbcon_is_inactive(vc, info))
1296 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1297 get_color(vc, info, scr_readw(s), 1),
1298 get_color(vc, info, scr_readw(s), 0));
1299 }
1300
fbcon_putc(struct vc_data * vc,int c,int ypos,int xpos)1301 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1302 {
1303 unsigned short chr;
1304
1305 scr_writew(c, &chr);
1306 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1307 }
1308
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1309 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1310 {
1311 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1312 struct fbcon_ops *ops = info->fbcon_par;
1313
1314 if (!fbcon_is_inactive(vc, info))
1315 ops->clear_margins(vc, info, margin_color, bottom_only);
1316 }
1317
fbcon_cursor(struct vc_data * vc,int mode)1318 static void fbcon_cursor(struct vc_data *vc, int mode)
1319 {
1320 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1321 struct fbcon_ops *ops = info->fbcon_par;
1322 int c = scr_readw((u16 *) vc->vc_pos);
1323
1324 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1325
1326 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1327 return;
1328
1329 if (vc->vc_cursor_type & CUR_SW)
1330 fbcon_del_cursor_timer(info);
1331 else
1332 fbcon_add_cursor_timer(info);
1333
1334 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1335
1336 if (!ops->cursor)
1337 return;
1338
1339 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1340 get_color(vc, info, c, 0));
1341 }
1342
1343 static int scrollback_phys_max = 0;
1344 static int scrollback_max = 0;
1345 static int scrollback_current = 0;
1346
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1347 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1348 int unit)
1349 {
1350 struct fbcon_display *p, *t;
1351 struct vc_data **default_mode, *vc;
1352 struct vc_data *svc;
1353 struct fbcon_ops *ops = info->fbcon_par;
1354 int rows, cols;
1355
1356 p = &fb_display[unit];
1357
1358 if (var_to_display(p, var, info))
1359 return;
1360
1361 vc = vc_cons[unit].d;
1362
1363 if (!vc)
1364 return;
1365
1366 default_mode = vc->vc_display_fg;
1367 svc = *default_mode;
1368 t = &fb_display[svc->vc_num];
1369
1370 if (!vc->vc_font.data) {
1371 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1372 vc->vc_font.width = (*default_mode)->vc_font.width;
1373 vc->vc_font.height = (*default_mode)->vc_font.height;
1374 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1375 p->userfont = t->userfont;
1376 if (p->userfont)
1377 REFCOUNT(p->fontdata)++;
1378 }
1379
1380 var->activate = FB_ACTIVATE_NOW;
1381 info->var.activate = var->activate;
1382 var->yoffset = info->var.yoffset;
1383 var->xoffset = info->var.xoffset;
1384 fb_set_var(info, var);
1385 ops->var = info->var;
1386 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1387 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1388 if (vc->vc_font.charcount == 256) {
1389 vc->vc_hi_font_mask = 0;
1390 } else {
1391 vc->vc_hi_font_mask = 0x100;
1392 if (vc->vc_can_do_color)
1393 vc->vc_complement_mask <<= 1;
1394 }
1395
1396 if (!*svc->vc_uni_pagedir_loc)
1397 con_set_default_unimap(svc);
1398 if (!*vc->vc_uni_pagedir_loc)
1399 con_copy_unimap(vc, svc);
1400
1401 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1402 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1403 cols /= vc->vc_font.width;
1404 rows /= vc->vc_font.height;
1405 vc_resize(vc, cols, rows);
1406
1407 if (con_is_visible(vc)) {
1408 update_screen(vc);
1409 }
1410 }
1411
ywrap_up(struct vc_data * vc,int count)1412 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1413 {
1414 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1415 struct fbcon_ops *ops = info->fbcon_par;
1416 struct fbcon_display *p = &fb_display[vc->vc_num];
1417
1418 p->yscroll += count;
1419 if (p->yscroll >= p->vrows) /* Deal with wrap */
1420 p->yscroll -= p->vrows;
1421 ops->var.xoffset = 0;
1422 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1423 ops->var.vmode |= FB_VMODE_YWRAP;
1424 ops->update_start(info);
1425 scrollback_max += count;
1426 if (scrollback_max > scrollback_phys_max)
1427 scrollback_max = scrollback_phys_max;
1428 scrollback_current = 0;
1429 }
1430
ywrap_down(struct vc_data * vc,int count)1431 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1432 {
1433 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1434 struct fbcon_ops *ops = info->fbcon_par;
1435 struct fbcon_display *p = &fb_display[vc->vc_num];
1436
1437 p->yscroll -= count;
1438 if (p->yscroll < 0) /* Deal with wrap */
1439 p->yscroll += p->vrows;
1440 ops->var.xoffset = 0;
1441 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1442 ops->var.vmode |= FB_VMODE_YWRAP;
1443 ops->update_start(info);
1444 scrollback_max -= count;
1445 if (scrollback_max < 0)
1446 scrollback_max = 0;
1447 scrollback_current = 0;
1448 }
1449
ypan_up(struct vc_data * vc,int count)1450 static __inline__ void ypan_up(struct vc_data *vc, int count)
1451 {
1452 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1453 struct fbcon_display *p = &fb_display[vc->vc_num];
1454 struct fbcon_ops *ops = info->fbcon_par;
1455
1456 p->yscroll += count;
1457 if (p->yscroll > p->vrows - vc->vc_rows) {
1458 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1459 0, 0, 0, vc->vc_rows, vc->vc_cols);
1460 p->yscroll -= p->vrows - vc->vc_rows;
1461 }
1462
1463 ops->var.xoffset = 0;
1464 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1465 ops->var.vmode &= ~FB_VMODE_YWRAP;
1466 ops->update_start(info);
1467 fbcon_clear_margins(vc, 1);
1468 scrollback_max += count;
1469 if (scrollback_max > scrollback_phys_max)
1470 scrollback_max = scrollback_phys_max;
1471 scrollback_current = 0;
1472 }
1473
ypan_up_redraw(struct vc_data * vc,int t,int count)1474 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1475 {
1476 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1477 struct fbcon_ops *ops = info->fbcon_par;
1478 struct fbcon_display *p = &fb_display[vc->vc_num];
1479
1480 p->yscroll += count;
1481
1482 if (p->yscroll > p->vrows - vc->vc_rows) {
1483 p->yscroll -= p->vrows - vc->vc_rows;
1484 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1485 }
1486
1487 ops->var.xoffset = 0;
1488 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1489 ops->var.vmode &= ~FB_VMODE_YWRAP;
1490 ops->update_start(info);
1491 fbcon_clear_margins(vc, 1);
1492 scrollback_max += count;
1493 if (scrollback_max > scrollback_phys_max)
1494 scrollback_max = scrollback_phys_max;
1495 scrollback_current = 0;
1496 }
1497
ypan_down(struct vc_data * vc,int count)1498 static __inline__ void ypan_down(struct vc_data *vc, int count)
1499 {
1500 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1501 struct fbcon_display *p = &fb_display[vc->vc_num];
1502 struct fbcon_ops *ops = info->fbcon_par;
1503
1504 p->yscroll -= count;
1505 if (p->yscroll < 0) {
1506 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1507 0, vc->vc_rows, vc->vc_cols);
1508 p->yscroll += p->vrows - vc->vc_rows;
1509 }
1510
1511 ops->var.xoffset = 0;
1512 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1513 ops->var.vmode &= ~FB_VMODE_YWRAP;
1514 ops->update_start(info);
1515 fbcon_clear_margins(vc, 1);
1516 scrollback_max -= count;
1517 if (scrollback_max < 0)
1518 scrollback_max = 0;
1519 scrollback_current = 0;
1520 }
1521
ypan_down_redraw(struct vc_data * vc,int t,int count)1522 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1523 {
1524 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1525 struct fbcon_ops *ops = info->fbcon_par;
1526 struct fbcon_display *p = &fb_display[vc->vc_num];
1527
1528 p->yscroll -= count;
1529
1530 if (p->yscroll < 0) {
1531 p->yscroll += p->vrows - vc->vc_rows;
1532 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1533 }
1534
1535 ops->var.xoffset = 0;
1536 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1537 ops->var.vmode &= ~FB_VMODE_YWRAP;
1538 ops->update_start(info);
1539 fbcon_clear_margins(vc, 1);
1540 scrollback_max -= count;
1541 if (scrollback_max < 0)
1542 scrollback_max = 0;
1543 scrollback_current = 0;
1544 }
1545
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1546 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1547 int line, int count, int dy)
1548 {
1549 unsigned short *s = (unsigned short *)
1550 (vc->vc_origin + vc->vc_size_row * line);
1551
1552 while (count--) {
1553 unsigned short *start = s;
1554 unsigned short *le = advance_row(s, 1);
1555 unsigned short c;
1556 int x = 0;
1557 unsigned short attr = 1;
1558
1559 do {
1560 c = scr_readw(s);
1561 if (attr != (c & 0xff00)) {
1562 attr = c & 0xff00;
1563 if (s > start) {
1564 fbcon_putcs(vc, start, s - start,
1565 dy, x);
1566 x += s - start;
1567 start = s;
1568 }
1569 }
1570 console_conditional_schedule();
1571 s++;
1572 } while (s < le);
1573 if (s > start)
1574 fbcon_putcs(vc, start, s - start, dy, x);
1575 console_conditional_schedule();
1576 dy++;
1577 }
1578 }
1579
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1580 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1581 struct fbcon_display *p, int line, int count, int ycount)
1582 {
1583 int offset = ycount * vc->vc_cols;
1584 unsigned short *d = (unsigned short *)
1585 (vc->vc_origin + vc->vc_size_row * line);
1586 unsigned short *s = d + offset;
1587 struct fbcon_ops *ops = info->fbcon_par;
1588
1589 while (count--) {
1590 unsigned short *start = s;
1591 unsigned short *le = advance_row(s, 1);
1592 unsigned short c;
1593 int x = 0;
1594
1595 do {
1596 c = scr_readw(s);
1597
1598 if (c == scr_readw(d)) {
1599 if (s > start) {
1600 ops->bmove(vc, info, line + ycount, x,
1601 line, x, 1, s-start);
1602 x += s - start + 1;
1603 start = s + 1;
1604 } else {
1605 x++;
1606 start++;
1607 }
1608 }
1609
1610 scr_writew(c, d);
1611 console_conditional_schedule();
1612 s++;
1613 d++;
1614 } while (s < le);
1615 if (s > start)
1616 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1617 s-start);
1618 console_conditional_schedule();
1619 if (ycount > 0)
1620 line++;
1621 else {
1622 line--;
1623 /* NOTE: We subtract two lines from these pointers */
1624 s -= vc->vc_size_row;
1625 d -= vc->vc_size_row;
1626 }
1627 }
1628 }
1629
fbcon_redraw(struct vc_data * vc,struct fbcon_display * p,int line,int count,int offset)1630 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1631 int line, int count, int offset)
1632 {
1633 unsigned short *d = (unsigned short *)
1634 (vc->vc_origin + vc->vc_size_row * line);
1635 unsigned short *s = d + offset;
1636
1637 while (count--) {
1638 unsigned short *start = s;
1639 unsigned short *le = advance_row(s, 1);
1640 unsigned short c;
1641 int x = 0;
1642 unsigned short attr = 1;
1643
1644 do {
1645 c = scr_readw(s);
1646 if (attr != (c & 0xff00)) {
1647 attr = c & 0xff00;
1648 if (s > start) {
1649 fbcon_putcs(vc, start, s - start,
1650 line, x);
1651 x += s - start;
1652 start = s;
1653 }
1654 }
1655 if (c == scr_readw(d)) {
1656 if (s > start) {
1657 fbcon_putcs(vc, start, s - start,
1658 line, x);
1659 x += s - start + 1;
1660 start = s + 1;
1661 } else {
1662 x++;
1663 start++;
1664 }
1665 }
1666 scr_writew(c, d);
1667 console_conditional_schedule();
1668 s++;
1669 d++;
1670 } while (s < le);
1671 if (s > start)
1672 fbcon_putcs(vc, start, s - start, line, x);
1673 console_conditional_schedule();
1674 if (offset > 0)
1675 line++;
1676 else {
1677 line--;
1678 /* NOTE: We subtract two lines from these pointers */
1679 s -= vc->vc_size_row;
1680 d -= vc->vc_size_row;
1681 }
1682 }
1683 }
1684
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1685 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1686 enum con_scroll dir, unsigned int count)
1687 {
1688 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1689 struct fbcon_display *p = &fb_display[vc->vc_num];
1690 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1691
1692 if (fbcon_is_inactive(vc, info))
1693 return true;
1694
1695 fbcon_cursor(vc, CM_ERASE);
1696
1697 /*
1698 * ++Geert: Only use ywrap/ypan if the console is in text mode
1699 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1700 * whole screen (prevents flicker).
1701 */
1702
1703 switch (dir) {
1704 case SM_UP:
1705 if (count > vc->vc_rows) /* Maximum realistic size */
1706 count = vc->vc_rows;
1707 if (logo_shown >= 0)
1708 goto redraw_up;
1709 switch (p->scrollmode) {
1710 case SCROLL_MOVE:
1711 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1712 count);
1713 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1714 scr_memsetw((unsigned short *) (vc->vc_origin +
1715 vc->vc_size_row *
1716 (b - count)),
1717 vc->vc_video_erase_char,
1718 vc->vc_size_row * count);
1719 return true;
1720
1721 case SCROLL_WRAP_MOVE:
1722 if (b - t - count > 3 * vc->vc_rows >> 2) {
1723 if (t > 0)
1724 fbcon_bmove(vc, 0, 0, count, 0, t,
1725 vc->vc_cols);
1726 ywrap_up(vc, count);
1727 if (vc->vc_rows - b > 0)
1728 fbcon_bmove(vc, b - count, 0, b, 0,
1729 vc->vc_rows - b,
1730 vc->vc_cols);
1731 } else if (info->flags & FBINFO_READS_FAST)
1732 fbcon_bmove(vc, t + count, 0, t, 0,
1733 b - t - count, vc->vc_cols);
1734 else
1735 goto redraw_up;
1736 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1737 break;
1738
1739 case SCROLL_PAN_REDRAW:
1740 if ((p->yscroll + count <=
1741 2 * (p->vrows - vc->vc_rows))
1742 && ((!scroll_partial && (b - t == vc->vc_rows))
1743 || (scroll_partial
1744 && (b - t - count >
1745 3 * vc->vc_rows >> 2)))) {
1746 if (t > 0)
1747 fbcon_redraw_move(vc, p, 0, t, count);
1748 ypan_up_redraw(vc, t, count);
1749 if (vc->vc_rows - b > 0)
1750 fbcon_redraw_move(vc, p, b,
1751 vc->vc_rows - b, b);
1752 } else
1753 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1754 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1755 break;
1756
1757 case SCROLL_PAN_MOVE:
1758 if ((p->yscroll + count <=
1759 2 * (p->vrows - vc->vc_rows))
1760 && ((!scroll_partial && (b - t == vc->vc_rows))
1761 || (scroll_partial
1762 && (b - t - count >
1763 3 * vc->vc_rows >> 2)))) {
1764 if (t > 0)
1765 fbcon_bmove(vc, 0, 0, count, 0, t,
1766 vc->vc_cols);
1767 ypan_up(vc, count);
1768 if (vc->vc_rows - b > 0)
1769 fbcon_bmove(vc, b - count, 0, b, 0,
1770 vc->vc_rows - b,
1771 vc->vc_cols);
1772 } else if (info->flags & FBINFO_READS_FAST)
1773 fbcon_bmove(vc, t + count, 0, t, 0,
1774 b - t - count, vc->vc_cols);
1775 else
1776 goto redraw_up;
1777 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1778 break;
1779
1780 case SCROLL_REDRAW:
1781 redraw_up:
1782 fbcon_redraw(vc, p, t, b - t - count,
1783 count * vc->vc_cols);
1784 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1785 scr_memsetw((unsigned short *) (vc->vc_origin +
1786 vc->vc_size_row *
1787 (b - count)),
1788 vc->vc_video_erase_char,
1789 vc->vc_size_row * count);
1790 return true;
1791 }
1792 break;
1793
1794 case SM_DOWN:
1795 if (count > vc->vc_rows) /* Maximum realistic size */
1796 count = vc->vc_rows;
1797 if (logo_shown >= 0)
1798 goto redraw_down;
1799 switch (p->scrollmode) {
1800 case SCROLL_MOVE:
1801 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1802 -count);
1803 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1804 scr_memsetw((unsigned short *) (vc->vc_origin +
1805 vc->vc_size_row *
1806 t),
1807 vc->vc_video_erase_char,
1808 vc->vc_size_row * count);
1809 return true;
1810
1811 case SCROLL_WRAP_MOVE:
1812 if (b - t - count > 3 * vc->vc_rows >> 2) {
1813 if (vc->vc_rows - b > 0)
1814 fbcon_bmove(vc, b, 0, b - count, 0,
1815 vc->vc_rows - b,
1816 vc->vc_cols);
1817 ywrap_down(vc, count);
1818 if (t > 0)
1819 fbcon_bmove(vc, count, 0, 0, 0, t,
1820 vc->vc_cols);
1821 } else if (info->flags & FBINFO_READS_FAST)
1822 fbcon_bmove(vc, t, 0, t + count, 0,
1823 b - t - count, vc->vc_cols);
1824 else
1825 goto redraw_down;
1826 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1827 break;
1828
1829 case SCROLL_PAN_MOVE:
1830 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1831 && ((!scroll_partial && (b - t == vc->vc_rows))
1832 || (scroll_partial
1833 && (b - t - count >
1834 3 * vc->vc_rows >> 2)))) {
1835 if (vc->vc_rows - b > 0)
1836 fbcon_bmove(vc, b, 0, b - count, 0,
1837 vc->vc_rows - b,
1838 vc->vc_cols);
1839 ypan_down(vc, count);
1840 if (t > 0)
1841 fbcon_bmove(vc, count, 0, 0, 0, t,
1842 vc->vc_cols);
1843 } else if (info->flags & FBINFO_READS_FAST)
1844 fbcon_bmove(vc, t, 0, t + count, 0,
1845 b - t - count, vc->vc_cols);
1846 else
1847 goto redraw_down;
1848 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1849 break;
1850
1851 case SCROLL_PAN_REDRAW:
1852 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1853 && ((!scroll_partial && (b - t == vc->vc_rows))
1854 || (scroll_partial
1855 && (b - t - count >
1856 3 * vc->vc_rows >> 2)))) {
1857 if (vc->vc_rows - b > 0)
1858 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1859 b - count);
1860 ypan_down_redraw(vc, t, count);
1861 if (t > 0)
1862 fbcon_redraw_move(vc, p, count, t, 0);
1863 } else
1864 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1865 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1866 break;
1867
1868 case SCROLL_REDRAW:
1869 redraw_down:
1870 fbcon_redraw(vc, p, b - 1, b - t - count,
1871 -count * vc->vc_cols);
1872 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1873 scr_memsetw((unsigned short *) (vc->vc_origin +
1874 vc->vc_size_row *
1875 t),
1876 vc->vc_video_erase_char,
1877 vc->vc_size_row * count);
1878 return true;
1879 }
1880 }
1881 return false;
1882 }
1883
1884
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1885 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1886 int height, int width)
1887 {
1888 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1889 struct fbcon_display *p = &fb_display[vc->vc_num];
1890
1891 if (fbcon_is_inactive(vc, info))
1892 return;
1893
1894 if (!width || !height)
1895 return;
1896
1897 /* Split blits that cross physical y_wrap case.
1898 * Pathological case involves 4 blits, better to use recursive
1899 * code rather than unrolled case
1900 *
1901 * Recursive invocations don't need to erase the cursor over and
1902 * over again, so we use fbcon_bmove_rec()
1903 */
1904 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1905 p->vrows - p->yscroll);
1906 }
1907
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)1908 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1909 int dy, int dx, int height, int width, u_int y_break)
1910 {
1911 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1912 struct fbcon_ops *ops = info->fbcon_par;
1913 u_int b;
1914
1915 if (sy < y_break && sy + height > y_break) {
1916 b = y_break - sy;
1917 if (dy < sy) { /* Avoid trashing self */
1918 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1919 y_break);
1920 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1921 height - b, width, y_break);
1922 } else {
1923 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1924 height - b, width, y_break);
1925 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1926 y_break);
1927 }
1928 return;
1929 }
1930
1931 if (dy < y_break && dy + height > y_break) {
1932 b = y_break - dy;
1933 if (dy < sy) { /* Avoid trashing self */
1934 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1935 y_break);
1936 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1937 height - b, width, y_break);
1938 } else {
1939 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1940 height - b, width, y_break);
1941 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1942 y_break);
1943 }
1944 return;
1945 }
1946 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1947 height, width);
1948 }
1949
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1950 static void updatescrollmode(struct fbcon_display *p,
1951 struct fb_info *info,
1952 struct vc_data *vc)
1953 {
1954 struct fbcon_ops *ops = info->fbcon_par;
1955 int fh = vc->vc_font.height;
1956 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1957 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1958 info->var.xres_virtual);
1959
1960 p->vrows = vyres/fh;
1961 if (yres > (fh * (vc->vc_rows + 1)))
1962 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1963 if ((yres % fh) && (vyres % fh < yres % fh))
1964 p->vrows--;
1965 }
1966
1967 #define PITCH(w) (((w) + 7) >> 3)
1968 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
1969
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,unsigned int user)1970 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1971 unsigned int height, unsigned int user)
1972 {
1973 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1974 struct fbcon_ops *ops = info->fbcon_par;
1975 struct fbcon_display *p = &fb_display[vc->vc_num];
1976 struct fb_var_screeninfo var = info->var;
1977 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
1978
1979 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
1980 int size;
1981 int pitch = PITCH(vc->vc_font.width);
1982
1983 /*
1984 * If user font, ensure that a possible change to user font
1985 * height or width will not allow a font data out-of-bounds access.
1986 * NOTE: must use original charcount in calculation as font
1987 * charcount can change and cannot be used to determine the
1988 * font data allocated size.
1989 */
1990 if (pitch <= 0)
1991 return -EINVAL;
1992 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
1993 if (size > FNTSIZE(vc->vc_font.data))
1994 return -EINVAL;
1995 }
1996
1997 virt_w = FBCON_SWAP(ops->rotate, width, height);
1998 virt_h = FBCON_SWAP(ops->rotate, height, width);
1999 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2000 vc->vc_font.height);
2001 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2002 vc->vc_font.width);
2003 var.xres = virt_w * virt_fw;
2004 var.yres = virt_h * virt_fh;
2005 x_diff = info->var.xres - var.xres;
2006 y_diff = info->var.yres - var.yres;
2007 if (x_diff < 0 || x_diff > virt_fw ||
2008 y_diff < 0 || y_diff > virt_fh) {
2009 const struct fb_videomode *mode;
2010
2011 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2012 mode = fb_find_best_mode(&var, &info->modelist);
2013 if (mode == NULL)
2014 return -EINVAL;
2015 display_to_var(&var, p);
2016 fb_videomode_to_var(&var, mode);
2017
2018 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2019 return -EINVAL;
2020
2021 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2022 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2023 var.activate = FB_ACTIVATE_NOW |
2024 FB_ACTIVATE_FORCE;
2025 fb_set_var(info, &var);
2026 }
2027 var_to_display(p, &info->var, info);
2028 ops->var = info->var;
2029 }
2030 updatescrollmode(p, info, vc);
2031 return 0;
2032 }
2033
fbcon_switch(struct vc_data * vc)2034 static int fbcon_switch(struct vc_data *vc)
2035 {
2036 struct fb_info *info, *old_info = NULL;
2037 struct fbcon_ops *ops;
2038 struct fbcon_display *p = &fb_display[vc->vc_num];
2039 struct fb_var_screeninfo var;
2040 int i, ret, prev_console;
2041
2042 info = registered_fb[con2fb_map[vc->vc_num]];
2043 ops = info->fbcon_par;
2044
2045 if (logo_shown >= 0) {
2046 struct vc_data *conp2 = vc_cons[logo_shown].d;
2047
2048 if (conp2->vc_top == logo_lines
2049 && conp2->vc_bottom == conp2->vc_rows)
2050 conp2->vc_top = 0;
2051 logo_shown = FBCON_LOGO_CANSHOW;
2052 }
2053
2054 prev_console = ops->currcon;
2055 if (prev_console != -1)
2056 old_info = registered_fb[con2fb_map[prev_console]];
2057 /*
2058 * FIXME: If we have multiple fbdev's loaded, we need to
2059 * update all info->currcon. Perhaps, we can place this
2060 * in a centralized structure, but this might break some
2061 * drivers.
2062 *
2063 * info->currcon = vc->vc_num;
2064 */
2065 for_each_registered_fb(i) {
2066 if (registered_fb[i]->fbcon_par) {
2067 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2068
2069 o->currcon = vc->vc_num;
2070 }
2071 }
2072 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2073 display_to_var(&var, p);
2074 var.activate = FB_ACTIVATE_NOW;
2075
2076 /*
2077 * make sure we don't unnecessarily trip the memcmp()
2078 * in fb_set_var()
2079 */
2080 info->var.activate = var.activate;
2081 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2082 fb_set_var(info, &var);
2083 ops->var = info->var;
2084
2085 if (old_info != NULL && (old_info != info ||
2086 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2087 if (info->fbops->fb_set_par) {
2088 ret = info->fbops->fb_set_par(info);
2089
2090 if (ret)
2091 printk(KERN_ERR "fbcon_switch: detected "
2092 "unhandled fb_set_par error, "
2093 "error code %d\n", ret);
2094 }
2095
2096 if (old_info != info)
2097 fbcon_del_cursor_timer(old_info);
2098 }
2099
2100 if (fbcon_is_inactive(vc, info) ||
2101 ops->blank_state != FB_BLANK_UNBLANK)
2102 fbcon_del_cursor_timer(info);
2103 else
2104 fbcon_add_cursor_timer(info);
2105
2106 set_blitting_type(vc, info);
2107 ops->cursor_reset = 1;
2108
2109 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2110 ops->rotate = FB_ROTATE_UR;
2111 set_blitting_type(vc, info);
2112 }
2113
2114 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2115 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2116
2117 if (vc->vc_font.charcount > 256)
2118 vc->vc_complement_mask <<= 1;
2119
2120 updatescrollmode(p, info, vc);
2121
2122 switch (p->scrollmode) {
2123 case SCROLL_WRAP_MOVE:
2124 scrollback_phys_max = p->vrows - vc->vc_rows;
2125 break;
2126 case SCROLL_PAN_MOVE:
2127 case SCROLL_PAN_REDRAW:
2128 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2129 if (scrollback_phys_max < 0)
2130 scrollback_phys_max = 0;
2131 break;
2132 default:
2133 scrollback_phys_max = 0;
2134 break;
2135 }
2136
2137 scrollback_max = 0;
2138 scrollback_current = 0;
2139
2140 if (!fbcon_is_inactive(vc, info)) {
2141 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2142 ops->update_start(info);
2143 }
2144
2145 fbcon_set_palette(vc, color_table);
2146 fbcon_clear_margins(vc, 0);
2147
2148 if (logo_shown == FBCON_LOGO_DRAW) {
2149
2150 logo_shown = fg_console;
2151 /* This is protected above by initmem_freed */
2152 fb_show_logo(info, ops->rotate);
2153 update_region(vc,
2154 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2155 vc->vc_size_row * (vc->vc_bottom -
2156 vc->vc_top) / 2);
2157 return 0;
2158 }
2159 return 1;
2160 }
2161
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2162 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2163 int blank)
2164 {
2165 if (blank) {
2166 unsigned short charmask = vc->vc_hi_font_mask ?
2167 0x1ff : 0xff;
2168 unsigned short oldc;
2169
2170 oldc = vc->vc_video_erase_char;
2171 vc->vc_video_erase_char &= charmask;
2172 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2173 vc->vc_video_erase_char = oldc;
2174 }
2175 }
2176
fbcon_blank(struct vc_data * vc,int blank,int mode_switch)2177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2178 {
2179 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2180 struct fbcon_ops *ops = info->fbcon_par;
2181
2182 if (mode_switch) {
2183 struct fb_var_screeninfo var = info->var;
2184
2185 ops->graphics = 1;
2186
2187 if (!blank) {
2188 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2189 FB_ACTIVATE_KD_TEXT;
2190 fb_set_var(info, &var);
2191 ops->graphics = 0;
2192 ops->var = info->var;
2193 }
2194 }
2195
2196 if (!fbcon_is_inactive(vc, info)) {
2197 if (ops->blank_state != blank) {
2198 ops->blank_state = blank;
2199 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2200 ops->cursor_flash = (!blank);
2201
2202 if (fb_blank(info, blank))
2203 fbcon_generic_blank(vc, info, blank);
2204 }
2205
2206 if (!blank)
2207 update_screen(vc);
2208 }
2209
2210 if (mode_switch || fbcon_is_inactive(vc, info) ||
2211 ops->blank_state != FB_BLANK_UNBLANK)
2212 fbcon_del_cursor_timer(info);
2213 else
2214 fbcon_add_cursor_timer(info);
2215
2216 return 0;
2217 }
2218
fbcon_debug_enter(struct vc_data * vc)2219 static int fbcon_debug_enter(struct vc_data *vc)
2220 {
2221 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2222 struct fbcon_ops *ops = info->fbcon_par;
2223
2224 ops->save_graphics = ops->graphics;
2225 ops->graphics = 0;
2226 if (info->fbops->fb_debug_enter)
2227 info->fbops->fb_debug_enter(info);
2228 fbcon_set_palette(vc, color_table);
2229 return 0;
2230 }
2231
fbcon_debug_leave(struct vc_data * vc)2232 static int fbcon_debug_leave(struct vc_data *vc)
2233 {
2234 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2235 struct fbcon_ops *ops = info->fbcon_par;
2236
2237 ops->graphics = ops->save_graphics;
2238 if (info->fbops->fb_debug_leave)
2239 info->fbops->fb_debug_leave(info);
2240 return 0;
2241 }
2242
fbcon_get_font(struct vc_data * vc,struct console_font * font)2243 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2244 {
2245 u8 *fontdata = vc->vc_font.data;
2246 u8 *data = font->data;
2247 int i, j;
2248
2249 font->width = vc->vc_font.width;
2250 font->height = vc->vc_font.height;
2251 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2252 if (!font->data)
2253 return 0;
2254
2255 if (font->width <= 8) {
2256 j = vc->vc_font.height;
2257 if (font->charcount * j > FNTSIZE(fontdata))
2258 return -EINVAL;
2259
2260 for (i = 0; i < font->charcount; i++) {
2261 memcpy(data, fontdata, j);
2262 memset(data + j, 0, 32 - j);
2263 data += 32;
2264 fontdata += j;
2265 }
2266 } else if (font->width <= 16) {
2267 j = vc->vc_font.height * 2;
2268 if (font->charcount * j > FNTSIZE(fontdata))
2269 return -EINVAL;
2270
2271 for (i = 0; i < font->charcount; i++) {
2272 memcpy(data, fontdata, j);
2273 memset(data + j, 0, 64 - j);
2274 data += 64;
2275 fontdata += j;
2276 }
2277 } else if (font->width <= 24) {
2278 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2279 return -EINVAL;
2280
2281 for (i = 0; i < font->charcount; i++) {
2282 for (j = 0; j < vc->vc_font.height; j++) {
2283 *data++ = fontdata[0];
2284 *data++ = fontdata[1];
2285 *data++ = fontdata[2];
2286 fontdata += sizeof(u32);
2287 }
2288 memset(data, 0, 3 * (32 - j));
2289 data += 3 * (32 - j);
2290 }
2291 } else {
2292 j = vc->vc_font.height * 4;
2293 if (font->charcount * j > FNTSIZE(fontdata))
2294 return -EINVAL;
2295
2296 for (i = 0; i < font->charcount; i++) {
2297 memcpy(data, fontdata, j);
2298 memset(data + j, 0, 128 - j);
2299 data += 128;
2300 fontdata += j;
2301 }
2302 }
2303 return 0;
2304 }
2305
2306 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2307 static void set_vc_hi_font(struct vc_data *vc, bool set)
2308 {
2309 if (!set) {
2310 vc->vc_hi_font_mask = 0;
2311 if (vc->vc_can_do_color) {
2312 vc->vc_complement_mask >>= 1;
2313 vc->vc_s_complement_mask >>= 1;
2314 }
2315
2316 /* ++Edmund: reorder the attribute bits */
2317 if (vc->vc_can_do_color) {
2318 unsigned short *cp =
2319 (unsigned short *) vc->vc_origin;
2320 int count = vc->vc_screenbuf_size / 2;
2321 unsigned short c;
2322 for (; count > 0; count--, cp++) {
2323 c = scr_readw(cp);
2324 scr_writew(((c & 0xfe00) >> 1) |
2325 (c & 0xff), cp);
2326 }
2327 c = vc->vc_video_erase_char;
2328 vc->vc_video_erase_char =
2329 ((c & 0xfe00) >> 1) | (c & 0xff);
2330 vc->vc_attr >>= 1;
2331 }
2332 } else {
2333 vc->vc_hi_font_mask = 0x100;
2334 if (vc->vc_can_do_color) {
2335 vc->vc_complement_mask <<= 1;
2336 vc->vc_s_complement_mask <<= 1;
2337 }
2338
2339 /* ++Edmund: reorder the attribute bits */
2340 {
2341 unsigned short *cp =
2342 (unsigned short *) vc->vc_origin;
2343 int count = vc->vc_screenbuf_size / 2;
2344 unsigned short c;
2345 for (; count > 0; count--, cp++) {
2346 unsigned short newc;
2347 c = scr_readw(cp);
2348 if (vc->vc_can_do_color)
2349 newc =
2350 ((c & 0xff00) << 1) | (c &
2351 0xff);
2352 else
2353 newc = c & ~0x100;
2354 scr_writew(newc, cp);
2355 }
2356 c = vc->vc_video_erase_char;
2357 if (vc->vc_can_do_color) {
2358 vc->vc_video_erase_char =
2359 ((c & 0xff00) << 1) | (c & 0xff);
2360 vc->vc_attr <<= 1;
2361 } else
2362 vc->vc_video_erase_char = c & ~0x100;
2363 }
2364 }
2365 }
2366
fbcon_do_set_font(struct vc_data * vc,int w,int h,int charcount,const u8 * data,int userfont)2367 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2368 const u8 * data, int userfont)
2369 {
2370 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2371 struct fbcon_ops *ops = info->fbcon_par;
2372 struct fbcon_display *p = &fb_display[vc->vc_num];
2373 int resize;
2374 char *old_data = NULL;
2375
2376 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2377 if (p->userfont)
2378 old_data = vc->vc_font.data;
2379 vc->vc_font.data = (void *)(p->fontdata = data);
2380 if ((p->userfont = userfont))
2381 REFCOUNT(data)++;
2382 vc->vc_font.width = w;
2383 vc->vc_font.height = h;
2384 vc->vc_font.charcount = charcount;
2385 if (vc->vc_hi_font_mask && charcount == 256)
2386 set_vc_hi_font(vc, false);
2387 else if (!vc->vc_hi_font_mask && charcount == 512)
2388 set_vc_hi_font(vc, true);
2389
2390 if (resize) {
2391 int cols, rows;
2392
2393 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2394 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2395 cols /= w;
2396 rows /= h;
2397 vc_resize(vc, cols, rows);
2398 } else if (con_is_visible(vc)
2399 && vc->vc_mode == KD_TEXT) {
2400 fbcon_clear_margins(vc, 0);
2401 update_screen(vc);
2402 }
2403
2404 if (old_data && (--REFCOUNT(old_data) == 0))
2405 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2406 return 0;
2407 }
2408
2409 /*
2410 * User asked to set font; we are guaranteed that
2411 * a) width and height are in range 1..32
2412 * b) charcount does not exceed 512
2413 * but lets not assume that, since someone might someday want to use larger
2414 * fonts. And charcount of 512 is small for unicode support.
2415 *
2416 * However, user space gives the font in 32 rows , regardless of
2417 * actual font height. So a new API is needed if support for larger fonts
2418 * is ever implemented.
2419 */
2420
fbcon_set_font(struct vc_data * vc,struct console_font * font,unsigned int flags)2421 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2422 unsigned int flags)
2423 {
2424 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2425 unsigned charcount = font->charcount;
2426 int w = font->width;
2427 int h = font->height;
2428 int size;
2429 int i, csum;
2430 u8 *new_data, *data = font->data;
2431 int pitch = PITCH(font->width);
2432
2433 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2434 * If not this check should be changed to charcount < 256 */
2435 if (charcount != 256 && charcount != 512)
2436 return -EINVAL;
2437
2438 /* Make sure drawing engine can handle the font */
2439 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2440 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2441 return -EINVAL;
2442
2443 /* Make sure driver can handle the font length */
2444 if (fbcon_invalid_charcount(info, charcount))
2445 return -EINVAL;
2446
2447 size = CALC_FONTSZ(h, pitch, charcount);
2448
2449 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2450
2451 if (!new_data)
2452 return -ENOMEM;
2453
2454 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2455
2456 new_data += FONT_EXTRA_WORDS * sizeof(int);
2457 FNTSIZE(new_data) = size;
2458 REFCOUNT(new_data) = 0; /* usage counter */
2459 for (i=0; i< charcount; i++) {
2460 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2461 }
2462
2463 /* Since linux has a nice crc32 function use it for counting font
2464 * checksums. */
2465 csum = crc32(0, new_data, size);
2466
2467 FNTSUM(new_data) = csum;
2468 /* Check if the same font is on some other console already */
2469 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2470 struct vc_data *tmp = vc_cons[i].d;
2471
2472 if (fb_display[i].userfont &&
2473 fb_display[i].fontdata &&
2474 FNTSUM(fb_display[i].fontdata) == csum &&
2475 FNTSIZE(fb_display[i].fontdata) == size &&
2476 tmp->vc_font.width == w &&
2477 !memcmp(fb_display[i].fontdata, new_data, size)) {
2478 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2479 new_data = (u8 *)fb_display[i].fontdata;
2480 break;
2481 }
2482 }
2483 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2484 }
2485
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,char * name)2486 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2487 {
2488 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2489 const struct font_desc *f;
2490
2491 if (!name)
2492 f = get_default_font(info->var.xres, info->var.yres,
2493 info->pixmap.blit_x, info->pixmap.blit_y);
2494 else if (!(f = find_font(name)))
2495 return -ENOENT;
2496
2497 font->width = f->width;
2498 font->height = f->height;
2499 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2500 }
2501
2502 static u16 palette_red[16];
2503 static u16 palette_green[16];
2504 static u16 palette_blue[16];
2505
2506 static struct fb_cmap palette_cmap = {
2507 0, 16, palette_red, palette_green, palette_blue, NULL
2508 };
2509
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2510 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2511 {
2512 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2513 int i, j, k, depth;
2514 u8 val;
2515
2516 if (fbcon_is_inactive(vc, info))
2517 return;
2518
2519 if (!con_is_visible(vc))
2520 return;
2521
2522 depth = fb_get_color_depth(&info->var, &info->fix);
2523 if (depth > 3) {
2524 for (i = j = 0; i < 16; i++) {
2525 k = table[i];
2526 val = vc->vc_palette[j++];
2527 palette_red[k] = (val << 8) | val;
2528 val = vc->vc_palette[j++];
2529 palette_green[k] = (val << 8) | val;
2530 val = vc->vc_palette[j++];
2531 palette_blue[k] = (val << 8) | val;
2532 }
2533 palette_cmap.len = 16;
2534 palette_cmap.start = 0;
2535 /*
2536 * If framebuffer is capable of less than 16 colors,
2537 * use default palette of fbcon.
2538 */
2539 } else
2540 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2541
2542 fb_set_cmap(&palette_cmap, info);
2543 }
2544
fbcon_screen_pos(const struct vc_data * vc,int offset)2545 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2546 {
2547 return (u16 *) (vc->vc_origin + offset);
2548 }
2549
fbcon_getxy(struct vc_data * vc,unsigned long pos,int * px,int * py)2550 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2551 int *px, int *py)
2552 {
2553 unsigned long ret;
2554 int x, y;
2555
2556 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2557 unsigned long offset = (pos - vc->vc_origin) / 2;
2558
2559 x = offset % vc->vc_cols;
2560 y = offset / vc->vc_cols;
2561 ret = pos + (vc->vc_cols - x) * 2;
2562 } else {
2563 /* Should not happen */
2564 x = y = 0;
2565 ret = vc->vc_origin;
2566 }
2567 if (px)
2568 *px = x;
2569 if (py)
2570 *py = y;
2571 return ret;
2572 }
2573
2574 /* As we might be inside of softback, we may work with non-contiguous buffer,
2575 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2576 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2577 {
2578 while (cnt--) {
2579 u16 a = scr_readw(p);
2580 if (!vc->vc_can_do_color)
2581 a ^= 0x0800;
2582 else if (vc->vc_hi_font_mask == 0x100)
2583 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2584 (((a) & 0x0e00) << 4);
2585 else
2586 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2587 (((a) & 0x0700) << 4);
2588 scr_writew(a, p++);
2589 }
2590 }
2591
fbcon_suspended(struct fb_info * info)2592 void fbcon_suspended(struct fb_info *info)
2593 {
2594 struct vc_data *vc = NULL;
2595 struct fbcon_ops *ops = info->fbcon_par;
2596
2597 if (!ops || ops->currcon < 0)
2598 return;
2599 vc = vc_cons[ops->currcon].d;
2600
2601 /* Clear cursor, restore saved data */
2602 fbcon_cursor(vc, CM_ERASE);
2603 }
2604
fbcon_resumed(struct fb_info * info)2605 void fbcon_resumed(struct fb_info *info)
2606 {
2607 struct vc_data *vc;
2608 struct fbcon_ops *ops = info->fbcon_par;
2609
2610 if (!ops || ops->currcon < 0)
2611 return;
2612 vc = vc_cons[ops->currcon].d;
2613
2614 update_screen(vc);
2615 }
2616
fbcon_modechanged(struct fb_info * info)2617 static void fbcon_modechanged(struct fb_info *info)
2618 {
2619 struct fbcon_ops *ops = info->fbcon_par;
2620 struct vc_data *vc;
2621 struct fbcon_display *p;
2622 int rows, cols;
2623
2624 if (!ops || ops->currcon < 0)
2625 return;
2626 vc = vc_cons[ops->currcon].d;
2627 if (vc->vc_mode != KD_TEXT ||
2628 registered_fb[con2fb_map[ops->currcon]] != info)
2629 return;
2630
2631 p = &fb_display[vc->vc_num];
2632 set_blitting_type(vc, info);
2633
2634 if (con_is_visible(vc)) {
2635 var_to_display(p, &info->var, info);
2636 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2637 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2638 cols /= vc->vc_font.width;
2639 rows /= vc->vc_font.height;
2640 vc_resize(vc, cols, rows);
2641 updatescrollmode(p, info, vc);
2642 scrollback_max = 0;
2643 scrollback_current = 0;
2644
2645 if (!fbcon_is_inactive(vc, info)) {
2646 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2647 ops->update_start(info);
2648 }
2649
2650 fbcon_set_palette(vc, color_table);
2651 update_screen(vc);
2652 }
2653 }
2654
fbcon_set_all_vcs(struct fb_info * info)2655 static void fbcon_set_all_vcs(struct fb_info *info)
2656 {
2657 struct fbcon_ops *ops = info->fbcon_par;
2658 struct vc_data *vc;
2659 struct fbcon_display *p;
2660 int i, rows, cols, fg = -1;
2661
2662 if (!ops || ops->currcon < 0)
2663 return;
2664
2665 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2666 vc = vc_cons[i].d;
2667 if (!vc || vc->vc_mode != KD_TEXT ||
2668 registered_fb[con2fb_map[i]] != info)
2669 continue;
2670
2671 if (con_is_visible(vc)) {
2672 fg = i;
2673 continue;
2674 }
2675
2676 p = &fb_display[vc->vc_num];
2677 set_blitting_type(vc, info);
2678 var_to_display(p, &info->var, info);
2679 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2680 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2681 cols /= vc->vc_font.width;
2682 rows /= vc->vc_font.height;
2683 vc_resize(vc, cols, rows);
2684 }
2685
2686 if (fg != -1)
2687 fbcon_modechanged(info);
2688 }
2689
2690
fbcon_update_vcs(struct fb_info * info,bool all)2691 void fbcon_update_vcs(struct fb_info *info, bool all)
2692 {
2693 if (all)
2694 fbcon_set_all_vcs(info);
2695 else
2696 fbcon_modechanged(info);
2697 }
2698 EXPORT_SYMBOL(fbcon_update_vcs);
2699
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2700 int fbcon_mode_deleted(struct fb_info *info,
2701 struct fb_videomode *mode)
2702 {
2703 struct fb_info *fb_info;
2704 struct fbcon_display *p;
2705 int i, j, found = 0;
2706
2707 /* before deletion, ensure that mode is not in use */
2708 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2709 j = con2fb_map[i];
2710 if (j == -1)
2711 continue;
2712 fb_info = registered_fb[j];
2713 if (fb_info != info)
2714 continue;
2715 p = &fb_display[i];
2716 if (!p || !p->mode)
2717 continue;
2718 if (fb_mode_is_equal(p->mode, mode)) {
2719 found = 1;
2720 break;
2721 }
2722 }
2723 return found;
2724 }
2725
2726 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2727 static void fbcon_unbind(void)
2728 {
2729 int ret;
2730
2731 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2732 fbcon_is_default);
2733
2734 if (!ret)
2735 fbcon_has_console_bind = 0;
2736 }
2737 #else
fbcon_unbind(void)2738 static inline void fbcon_unbind(void) {}
2739 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2740
2741 /* called with console_lock held */
fbcon_fb_unbind(struct fb_info * info)2742 void fbcon_fb_unbind(struct fb_info *info)
2743 {
2744 int i, new_idx = -1, ret = 0;
2745 int idx = info->node;
2746
2747 WARN_CONSOLE_UNLOCKED();
2748
2749 if (!fbcon_has_console_bind)
2750 return;
2751
2752 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2753 if (con2fb_map[i] != idx &&
2754 con2fb_map[i] != -1) {
2755 new_idx = con2fb_map[i];
2756 break;
2757 }
2758 }
2759
2760 if (new_idx != -1) {
2761 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2762 if (con2fb_map[i] == idx)
2763 set_con2fb_map(i, new_idx, 0);
2764 }
2765 } else {
2766 struct fb_info *info = registered_fb[idx];
2767
2768 /* This is sort of like set_con2fb_map, except it maps
2769 * the consoles to no device and then releases the
2770 * oldinfo to free memory and cancel the cursor blink
2771 * timer. I can imagine this just becoming part of
2772 * set_con2fb_map where new_idx is -1
2773 */
2774 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2775 if (con2fb_map[i] == idx) {
2776 con2fb_map[i] = -1;
2777 if (!search_fb_in_map(idx)) {
2778 ret = con2fb_release_oldinfo(vc_cons[i].d,
2779 info, NULL, i,
2780 idx, 0);
2781 if (ret) {
2782 con2fb_map[i] = idx;
2783 return;
2784 }
2785 }
2786 }
2787 }
2788 fbcon_unbind();
2789 }
2790 }
2791
2792 /* called with console_lock held */
fbcon_fb_unregistered(struct fb_info * info)2793 void fbcon_fb_unregistered(struct fb_info *info)
2794 {
2795 int i, idx;
2796
2797 WARN_CONSOLE_UNLOCKED();
2798
2799 if (deferred_takeover)
2800 return;
2801
2802 idx = info->node;
2803 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2804 if (con2fb_map[i] == idx)
2805 con2fb_map[i] = -1;
2806 }
2807
2808 if (idx == info_idx) {
2809 info_idx = -1;
2810
2811 for_each_registered_fb(i) {
2812 info_idx = i;
2813 break;
2814 }
2815 }
2816
2817 if (info_idx != -1) {
2818 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2819 if (con2fb_map[i] == -1)
2820 con2fb_map[i] = info_idx;
2821 }
2822 }
2823
2824 if (primary_device == idx)
2825 primary_device = -1;
2826
2827 if (!num_registered_fb)
2828 do_unregister_con_driver(&fb_con);
2829 }
2830
fbcon_remap_all(struct fb_info * info)2831 void fbcon_remap_all(struct fb_info *info)
2832 {
2833 int i, idx = info->node;
2834
2835 console_lock();
2836 if (deferred_takeover) {
2837 for (i = first_fb_vc; i <= last_fb_vc; i++)
2838 con2fb_map_boot[i] = idx;
2839 fbcon_map_override();
2840 console_unlock();
2841 return;
2842 }
2843
2844 for (i = first_fb_vc; i <= last_fb_vc; i++)
2845 set_con2fb_map(i, idx, 0);
2846
2847 if (con_is_bound(&fb_con)) {
2848 printk(KERN_INFO "fbcon: Remapping primary device, "
2849 "fb%i, to tty %i-%i\n", idx,
2850 first_fb_vc + 1, last_fb_vc + 1);
2851 info_idx = idx;
2852 }
2853 console_unlock();
2854 }
2855
2856 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2857 static void fbcon_select_primary(struct fb_info *info)
2858 {
2859 if (!map_override && primary_device == -1 &&
2860 fb_is_primary_device(info)) {
2861 int i;
2862
2863 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2864 info->fix.id, info->node);
2865 primary_device = info->node;
2866
2867 for (i = first_fb_vc; i <= last_fb_vc; i++)
2868 con2fb_map_boot[i] = primary_device;
2869
2870 if (con_is_bound(&fb_con)) {
2871 printk(KERN_INFO "fbcon: Remapping primary device, "
2872 "fb%i, to tty %i-%i\n", info->node,
2873 first_fb_vc + 1, last_fb_vc + 1);
2874 info_idx = primary_device;
2875 }
2876 }
2877
2878 }
2879 #else
fbcon_select_primary(struct fb_info * info)2880 static inline void fbcon_select_primary(struct fb_info *info)
2881 {
2882 return;
2883 }
2884 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2885
2886 /* called with console_lock held */
fbcon_fb_registered(struct fb_info * info)2887 int fbcon_fb_registered(struct fb_info *info)
2888 {
2889 int ret = 0, i, idx;
2890
2891 WARN_CONSOLE_UNLOCKED();
2892
2893 idx = info->node;
2894 fbcon_select_primary(info);
2895
2896 if (deferred_takeover) {
2897 pr_info("fbcon: Deferring console take-over\n");
2898 return 0;
2899 }
2900
2901 if (info_idx == -1) {
2902 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2903 if (con2fb_map_boot[i] == idx) {
2904 info_idx = idx;
2905 break;
2906 }
2907 }
2908
2909 if (info_idx != -1)
2910 ret = do_fbcon_takeover(1);
2911 } else {
2912 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2913 if (con2fb_map_boot[i] == idx)
2914 set_con2fb_map(i, idx, 0);
2915 }
2916 }
2917
2918 return ret;
2919 }
2920
fbcon_fb_blanked(struct fb_info * info,int blank)2921 void fbcon_fb_blanked(struct fb_info *info, int blank)
2922 {
2923 struct fbcon_ops *ops = info->fbcon_par;
2924 struct vc_data *vc;
2925
2926 if (!ops || ops->currcon < 0)
2927 return;
2928
2929 vc = vc_cons[ops->currcon].d;
2930 if (vc->vc_mode != KD_TEXT ||
2931 registered_fb[con2fb_map[ops->currcon]] != info)
2932 return;
2933
2934 if (con_is_visible(vc)) {
2935 if (blank)
2936 do_blank_screen(0);
2937 else
2938 do_unblank_screen(0);
2939 }
2940 ops->blank_state = blank;
2941 }
2942
fbcon_new_modelist(struct fb_info * info)2943 void fbcon_new_modelist(struct fb_info *info)
2944 {
2945 int i;
2946 struct vc_data *vc;
2947 struct fb_var_screeninfo var;
2948 const struct fb_videomode *mode;
2949
2950 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2951 if (registered_fb[con2fb_map[i]] != info)
2952 continue;
2953 if (!fb_display[i].mode)
2954 continue;
2955 vc = vc_cons[i].d;
2956 display_to_var(&var, &fb_display[i]);
2957 mode = fb_find_nearest_mode(fb_display[i].mode,
2958 &info->modelist);
2959 fb_videomode_to_var(&var, mode);
2960 fbcon_set_disp(info, &var, vc->vc_num);
2961 }
2962 }
2963
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)2964 void fbcon_get_requirement(struct fb_info *info,
2965 struct fb_blit_caps *caps)
2966 {
2967 struct vc_data *vc;
2968
2969 if (caps->flags) {
2970 int i, charcnt;
2971
2972 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2973 vc = vc_cons[i].d;
2974 if (vc && vc->vc_mode == KD_TEXT &&
2975 info->node == con2fb_map[i]) {
2976 caps->x |= 1 << (vc->vc_font.width - 1);
2977 caps->y |= 1 << (vc->vc_font.height - 1);
2978 charcnt = vc->vc_font.charcount;
2979 if (caps->len < charcnt)
2980 caps->len = charcnt;
2981 }
2982 }
2983 } else {
2984 vc = vc_cons[fg_console].d;
2985
2986 if (vc && vc->vc_mode == KD_TEXT &&
2987 info->node == con2fb_map[fg_console]) {
2988 caps->x = 1 << (vc->vc_font.width - 1);
2989 caps->y = 1 << (vc->vc_font.height - 1);
2990 caps->len = vc->vc_font.charcount;
2991 }
2992 }
2993 }
2994
fbcon_set_con2fb_map_ioctl(void __user * argp)2995 int fbcon_set_con2fb_map_ioctl(void __user *argp)
2996 {
2997 struct fb_con2fbmap con2fb;
2998 int ret;
2999
3000 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3001 return -EFAULT;
3002 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3003 return -EINVAL;
3004 if (con2fb.framebuffer >= FB_MAX)
3005 return -EINVAL;
3006 if (!registered_fb[con2fb.framebuffer])
3007 request_module("fb%d", con2fb.framebuffer);
3008 if (!registered_fb[con2fb.framebuffer]) {
3009 return -EINVAL;
3010 }
3011
3012 console_lock();
3013 ret = set_con2fb_map(con2fb.console - 1,
3014 con2fb.framebuffer, 1);
3015 console_unlock();
3016
3017 return ret;
3018 }
3019
fbcon_get_con2fb_map_ioctl(void __user * argp)3020 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3021 {
3022 struct fb_con2fbmap con2fb;
3023
3024 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3025 return -EFAULT;
3026 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3027 return -EINVAL;
3028
3029 console_lock();
3030 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3031 console_unlock();
3032
3033 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3034 }
3035
3036 /*
3037 * The console `switch' structure for the frame buffer based console
3038 */
3039
3040 static const struct consw fb_con = {
3041 .owner = THIS_MODULE,
3042 .con_startup = fbcon_startup,
3043 .con_init = fbcon_init,
3044 .con_deinit = fbcon_deinit,
3045 .con_clear = fbcon_clear,
3046 .con_putc = fbcon_putc,
3047 .con_putcs = fbcon_putcs,
3048 .con_cursor = fbcon_cursor,
3049 .con_scroll = fbcon_scroll,
3050 .con_switch = fbcon_switch,
3051 .con_blank = fbcon_blank,
3052 .con_font_set = fbcon_set_font,
3053 .con_font_get = fbcon_get_font,
3054 .con_font_default = fbcon_set_def_font,
3055 .con_set_palette = fbcon_set_palette,
3056 .con_invert_region = fbcon_invert_region,
3057 .con_screen_pos = fbcon_screen_pos,
3058 .con_getxy = fbcon_getxy,
3059 .con_resize = fbcon_resize,
3060 .con_debug_enter = fbcon_debug_enter,
3061 .con_debug_leave = fbcon_debug_leave,
3062 };
3063
store_rotate(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3064 static ssize_t store_rotate(struct device *device,
3065 struct device_attribute *attr, const char *buf,
3066 size_t count)
3067 {
3068 struct fb_info *info;
3069 int rotate, idx;
3070 char **last = NULL;
3071
3072 console_lock();
3073 idx = con2fb_map[fg_console];
3074
3075 if (idx == -1 || registered_fb[idx] == NULL)
3076 goto err;
3077
3078 info = registered_fb[idx];
3079 rotate = simple_strtoul(buf, last, 0);
3080 fbcon_rotate(info, rotate);
3081 err:
3082 console_unlock();
3083 return count;
3084 }
3085
store_rotate_all(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3086 static ssize_t store_rotate_all(struct device *device,
3087 struct device_attribute *attr,const char *buf,
3088 size_t count)
3089 {
3090 struct fb_info *info;
3091 int rotate, idx;
3092 char **last = NULL;
3093
3094 console_lock();
3095 idx = con2fb_map[fg_console];
3096
3097 if (idx == -1 || registered_fb[idx] == NULL)
3098 goto err;
3099
3100 info = registered_fb[idx];
3101 rotate = simple_strtoul(buf, last, 0);
3102 fbcon_rotate_all(info, rotate);
3103 err:
3104 console_unlock();
3105 return count;
3106 }
3107
show_rotate(struct device * device,struct device_attribute * attr,char * buf)3108 static ssize_t show_rotate(struct device *device,
3109 struct device_attribute *attr,char *buf)
3110 {
3111 struct fb_info *info;
3112 int rotate = 0, idx;
3113
3114 console_lock();
3115 idx = con2fb_map[fg_console];
3116
3117 if (idx == -1 || registered_fb[idx] == NULL)
3118 goto err;
3119
3120 info = registered_fb[idx];
3121 rotate = fbcon_get_rotate(info);
3122 err:
3123 console_unlock();
3124 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3125 }
3126
show_cursor_blink(struct device * device,struct device_attribute * attr,char * buf)3127 static ssize_t show_cursor_blink(struct device *device,
3128 struct device_attribute *attr, char *buf)
3129 {
3130 struct fb_info *info;
3131 struct fbcon_ops *ops;
3132 int idx, blink = -1;
3133
3134 console_lock();
3135 idx = con2fb_map[fg_console];
3136
3137 if (idx == -1 || registered_fb[idx] == NULL)
3138 goto err;
3139
3140 info = registered_fb[idx];
3141 ops = info->fbcon_par;
3142
3143 if (!ops)
3144 goto err;
3145
3146 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3147 err:
3148 console_unlock();
3149 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3150 }
3151
store_cursor_blink(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3152 static ssize_t store_cursor_blink(struct device *device,
3153 struct device_attribute *attr,
3154 const char *buf, size_t count)
3155 {
3156 struct fb_info *info;
3157 int blink, idx;
3158 char **last = NULL;
3159
3160 console_lock();
3161 idx = con2fb_map[fg_console];
3162
3163 if (idx == -1 || registered_fb[idx] == NULL)
3164 goto err;
3165
3166 info = registered_fb[idx];
3167
3168 if (!info->fbcon_par)
3169 goto err;
3170
3171 blink = simple_strtoul(buf, last, 0);
3172
3173 if (blink) {
3174 fbcon_cursor_noblink = 0;
3175 fbcon_add_cursor_timer(info);
3176 } else {
3177 fbcon_cursor_noblink = 1;
3178 fbcon_del_cursor_timer(info);
3179 }
3180
3181 err:
3182 console_unlock();
3183 return count;
3184 }
3185
3186 static struct device_attribute device_attrs[] = {
3187 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3188 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3189 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3190 store_cursor_blink),
3191 };
3192
fbcon_init_device(void)3193 static int fbcon_init_device(void)
3194 {
3195 int i, error = 0;
3196
3197 fbcon_has_sysfs = 1;
3198
3199 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3200 error = device_create_file(fbcon_device, &device_attrs[i]);
3201
3202 if (error)
3203 break;
3204 }
3205
3206 if (error) {
3207 while (--i >= 0)
3208 device_remove_file(fbcon_device, &device_attrs[i]);
3209
3210 fbcon_has_sysfs = 0;
3211 }
3212
3213 return 0;
3214 }
3215
3216 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3217 static void fbcon_register_existing_fbs(struct work_struct *work)
3218 {
3219 int i;
3220
3221 console_lock();
3222
3223 for_each_registered_fb(i)
3224 fbcon_fb_registered(registered_fb[i]);
3225
3226 console_unlock();
3227 }
3228
3229 static struct notifier_block fbcon_output_nb;
3230 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3231
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3232 static int fbcon_output_notifier(struct notifier_block *nb,
3233 unsigned long action, void *data)
3234 {
3235 WARN_CONSOLE_UNLOCKED();
3236
3237 pr_info("fbcon: Taking over console\n");
3238
3239 dummycon_unregister_output_notifier(&fbcon_output_nb);
3240 deferred_takeover = false;
3241 logo_shown = FBCON_LOGO_DONTSHOW;
3242
3243 /* We may get called in atomic context */
3244 schedule_work(&fbcon_deferred_takeover_work);
3245
3246 return NOTIFY_OK;
3247 }
3248 #endif
3249
fbcon_start(void)3250 static void fbcon_start(void)
3251 {
3252 WARN_CONSOLE_UNLOCKED();
3253
3254 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3255 if (conswitchp != &dummy_con)
3256 deferred_takeover = false;
3257
3258 if (deferred_takeover) {
3259 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3260 dummycon_register_output_notifier(&fbcon_output_nb);
3261 return;
3262 }
3263 #endif
3264
3265 if (num_registered_fb) {
3266 int i;
3267
3268 for_each_registered_fb(i) {
3269 info_idx = i;
3270 break;
3271 }
3272
3273 do_fbcon_takeover(0);
3274 }
3275 }
3276
fbcon_exit(void)3277 static void fbcon_exit(void)
3278 {
3279 struct fb_info *info;
3280 int i, j, mapped;
3281
3282 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3283 if (deferred_takeover) {
3284 dummycon_unregister_output_notifier(&fbcon_output_nb);
3285 deferred_takeover = false;
3286 }
3287 #endif
3288
3289 for_each_registered_fb(i) {
3290 int pending = 0;
3291
3292 mapped = 0;
3293 info = registered_fb[i];
3294
3295 if (info->queue.func)
3296 pending = cancel_work_sync(&info->queue);
3297 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no"));
3298
3299 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3300 if (con2fb_map[j] == i) {
3301 mapped = 1;
3302 con2fb_map[j] = -1;
3303 }
3304 }
3305
3306 if (mapped) {
3307 if (info->fbops->fb_release)
3308 info->fbops->fb_release(info, 0);
3309 module_put(info->fbops->owner);
3310
3311 if (info->fbcon_par) {
3312 struct fbcon_ops *ops = info->fbcon_par;
3313
3314 fbcon_del_cursor_timer(info);
3315 kfree(ops->cursor_src);
3316 kfree(ops->cursor_state.mask);
3317 kfree(info->fbcon_par);
3318 info->fbcon_par = NULL;
3319 }
3320
3321 if (info->queue.func == fb_flashcursor)
3322 info->queue.func = NULL;
3323 }
3324 }
3325 }
3326
fb_console_init(void)3327 void __init fb_console_init(void)
3328 {
3329 int i;
3330
3331 console_lock();
3332 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3333 "fbcon");
3334
3335 if (IS_ERR(fbcon_device)) {
3336 printk(KERN_WARNING "Unable to create device "
3337 "for fbcon; errno = %ld\n",
3338 PTR_ERR(fbcon_device));
3339 fbcon_device = NULL;
3340 } else
3341 fbcon_init_device();
3342
3343 for (i = 0; i < MAX_NR_CONSOLES; i++)
3344 con2fb_map[i] = -1;
3345
3346 fbcon_start();
3347 console_unlock();
3348 }
3349
3350 #ifdef MODULE
3351
fbcon_deinit_device(void)3352 static void __exit fbcon_deinit_device(void)
3353 {
3354 int i;
3355
3356 if (fbcon_has_sysfs) {
3357 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3358 device_remove_file(fbcon_device, &device_attrs[i]);
3359
3360 fbcon_has_sysfs = 0;
3361 }
3362 }
3363
fb_console_exit(void)3364 void __exit fb_console_exit(void)
3365 {
3366 console_lock();
3367 fbcon_deinit_device();
3368 device_destroy(fb_class, MKDEV(0, 0));
3369 fbcon_exit();
3370 do_unregister_con_driver(&fb_con);
3371 console_unlock();
3372 }
3373 #endif
3374