?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / video / fbdev / core / fbcon.c
blob9d28a8e3328fbad14491e83c81d24a0d8fc5f9b7
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 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/fbcon.h>
72 #include <linux/vt_kern.h>
73 #include <linux/selection.h>
74 #include <linux/font.h>
75 #include <linux/smp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/crc32.h> /* For counting font checksums */
79 #include <linux/uaccess.h>
80 #include <asm/fb.h>
81 #include <asm/irq.h>
82
83 #include "fbcon.h"
84
85 #ifdef FBCONDEBUG
86 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
87 #else
88 # define DPRINTK(fmt, args...)
89 #endif
90
91 /*
92 * FIXME: Locking
93 *
94 * - fbcon state itself is protected by the console_lock, and the code does a
95 * pretty good job at making sure that lock is held everywhere it's needed.
96 *
97 * - access to the registered_fb array is entirely unprotected. This should use
98 * proper object lifetime handling, i.e. get/put_fb_info. This also means
99 * switching from indices to proper pointers for fb_info everywhere.
100 *
101 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
102 * means concurrent access to the same fbdev from both fbcon and userspace
103 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
104 * of fb_lock/unlock protected sections, since otherwise we'll recurse and
105 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
106 * fbmem.c cannot use locking asserts, and there's lots of callers which get
107 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
108 */
109
110 enum {
111 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
112 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
113 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
114 };
115
116 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
117
118 static signed char con2fb_map[MAX_NR_CONSOLES];
119 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
120
121 static int logo_lines;
122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
123 enums. */
124 static int logo_shown = FBCON_LOGO_CANSHOW;
125 /* Software scrollback */
126 static int fbcon_softback_size = 32768;
127 static unsigned long softback_buf, softback_curr;
128 static unsigned long softback_in;
129 static unsigned long softback_top, softback_end;
130 static int softback_lines;
131 /* console mappings */
132 static int first_fb_vc;
133 static int last_fb_vc = MAX_NR_CONSOLES - 1;
134 static int fbcon_is_default = 1;
135 static int primary_device = -1;
136 static int fbcon_has_console_bind;
137
138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
139 static int map_override;
140
141 static inline void fbcon_map_override(void)
142 {
143 map_override = 1;
144 }
145 #else
146 static inline void fbcon_map_override(void)
147 {
148 }
149 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
150
151 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
152 static bool deferred_takeover = true;
153 #else
154 #define deferred_takeover false
155 #endif
156
157 /* font data */
158 static char fontname[40];
159
160 /* current fb_info */
161 static int info_idx = -1;
162
163 /* console rotation */
164 static int initial_rotation = -1;
165 static int fbcon_has_sysfs;
166 static int margin_color;
167
168 static const struct consw fb_con;
169
170 #define CM_SOFTBACK (8)
171
172 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
173
174 static int fbcon_set_origin(struct vc_data *);
175
176 static int fbcon_cursor_noblink;
177
178 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
179
180 /*
181 * Interface used by the world
182 */
183
184 static const char *fbcon_startup(void);
185 static void fbcon_init(struct vc_data *vc, int init);
186 static void fbcon_deinit(struct vc_data *vc);
187 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
188 int width);
189 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
190 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
191 int count, int ypos, int xpos);
192 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
193 static void fbcon_cursor(struct vc_data *vc, int mode);
194 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
195 int height, int width);
196 static int fbcon_switch(struct vc_data *vc);
197 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
198 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
199
200 /*
201 * Internal routines
202 */
203 static __inline__ void ywrap_up(struct vc_data *vc, int count);
204 static __inline__ void ywrap_down(struct vc_data *vc, int count);
205 static __inline__ void ypan_up(struct vc_data *vc, int count);
206 static __inline__ void ypan_down(struct vc_data *vc, int count);
207 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
208 int dy, int dx, int height, int width, u_int y_break);
209 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
210 int unit);
211 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
212 int line, int count, int dy);
213 static void fbcon_modechanged(struct fb_info *info);
214 static void fbcon_set_all_vcs(struct fb_info *info);
215 static void fbcon_start(void);
216 static void fbcon_exit(void);
217 static struct device *fbcon_device;
218
219 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
220 static inline void fbcon_set_rotation(struct fb_info *info)
221 {
222 struct fbcon_ops *ops = info->fbcon_par;
223
224 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
225 ops->p->con_rotate < 4)
226 ops->rotate = ops->p->con_rotate;
227 else
228 ops->rotate = 0;
229 }
230
231 static void fbcon_rotate(struct fb_info *info, u32 rotate)
232 {
233 struct fbcon_ops *ops= info->fbcon_par;
234 struct fb_info *fb_info;
235
236 if (!ops || ops->currcon == -1)
237 return;
238
239 fb_info = registered_fb[con2fb_map[ops->currcon]];
240
241 if (info == fb_info) {
242 struct fbcon_display *p = &fb_display[ops->currcon];
243
244 if (rotate < 4)
245 p->con_rotate = rotate;
246 else
247 p->con_rotate = 0;
248
249 fbcon_modechanged(info);
250 }
251 }
252
253 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
254 {
255 struct fbcon_ops *ops = info->fbcon_par;
256 struct vc_data *vc;
257 struct fbcon_display *p;
258 int i;
259
260 if (!ops || ops->currcon < 0 || rotate > 3)
261 return;
262
263 for (i = first_fb_vc; i <= last_fb_vc; i++) {
264 vc = vc_cons[i].d;
265 if (!vc || vc->vc_mode != KD_TEXT ||
266 registered_fb[con2fb_map[i]] != info)
267 continue;
268
269 p = &fb_display[vc->vc_num];
270 p->con_rotate = rotate;
271 }
272
273 fbcon_set_all_vcs(info);
274 }
275 #else
276 static inline void fbcon_set_rotation(struct fb_info *info)
277 {
278 struct fbcon_ops *ops = info->fbcon_par;
279
280 ops->rotate = FB_ROTATE_UR;
281 }
282
283 static void fbcon_rotate(struct fb_info *info, u32 rotate)
284 {
285 return;
286 }
287
288 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
289 {
290 return;
291 }
292 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
293
294 static int fbcon_get_rotate(struct fb_info *info)
295 {
296 struct fbcon_ops *ops = info->fbcon_par;
297
298 return (ops) ? ops->rotate : 0;
299 }
300
301 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
302 {
303 struct fbcon_ops *ops = info->fbcon_par;
304
305 return (info->state != FBINFO_STATE_RUNNING ||
306 vc->vc_mode != KD_TEXT || ops->graphics);
307 }
308
309 static int get_color(struct vc_data *vc, struct fb_info *info,
310 u16 c, int is_fg)
311 {
312 int depth = fb_get_color_depth(&info->var, &info->fix);
313 int color = 0;
314
315 if (console_blanked) {
316 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
317
318 c = vc->vc_video_erase_char & charmask;
319 }
320
321 if (depth != 1)
322 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
323 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
324
325 switch (depth) {
326 case 1:
327 {
328 int col = mono_col(info);
329 /* 0 or 1 */
330 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
331 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
332
333 if (console_blanked)
334 fg = bg;
335
336 color = (is_fg) ? fg : bg;
337 break;
338 }
339 case 2:
340 /*
341 * Scale down 16-colors to 4 colors. Default 4-color palette
342 * is grayscale. However, simply dividing the values by 4
343 * will not work, as colors 1, 2 and 3 will be scaled-down
344 * to zero rendering them invisible. So empirically convert
345 * colors to a sane 4-level grayscale.
346 */
347 switch (color) {
348 case 0:
349 color = 0; /* black */
350 break;
351 case 1 ... 6:
352 color = 2; /* white */
353 break;
354 case 7 ... 8:
355 color = 1; /* gray */
356 break;
357 default:
358 color = 3; /* intense white */
359 break;
360 }
361 break;
362 case 3:
363 /*
364 * Last 8 entries of default 16-color palette is a more intense
365 * version of the first 8 (i.e., same chrominance, different
366 * luminance).
367 */
368 color &= 7;
369 break;
370 }
371
372
373 return color;
374 }
375
376 static void fbcon_update_softback(struct vc_data *vc)
377 {
378 int l = fbcon_softback_size / vc->vc_size_row;
379
380 if (l > 5)
381 softback_end = softback_buf + l * vc->vc_size_row;
382 else
383 /* Smaller scrollback makes no sense, and 0 would screw
384 the operation totally */
385 softback_top = 0;
386 }
387
388 static void fb_flashcursor(struct work_struct *work)
389 {
390 struct fb_info *info = container_of(work, struct fb_info, queue);
391 struct fbcon_ops *ops = info->fbcon_par;
392 struct vc_data *vc = NULL;
393 int c;
394 int mode;
395 int ret;
396
397 /* FIXME: we should sort out the unbind locking instead */
398 /* instead we just fail to flash the cursor if we can't get
399 * the lock instead of blocking fbcon deinit */
400 ret = console_trylock();
401 if (ret == 0)
402 return;
403
404 if (ops && ops->currcon != -1)
405 vc = vc_cons[ops->currcon].d;
406
407 if (!vc || !con_is_visible(vc) ||
408 registered_fb[con2fb_map[vc->vc_num]] != info ||
409 vc->vc_deccm != 1) {
410 console_unlock();
411 return;
412 }
413
414 c = scr_readw((u16 *) vc->vc_pos);
415 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
416 CM_ERASE : CM_DRAW;
417 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
418 get_color(vc, info, c, 0));
419 console_unlock();
420 }
421
422 static void cursor_timer_handler(struct timer_list *t)
423 {
424 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
425 struct fb_info *info = ops->info;
426
427 queue_work(system_power_efficient_wq, &info->queue);
428 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
429 }
430
431 static void fbcon_add_cursor_timer(struct fb_info *info)
432 {
433 struct fbcon_ops *ops = info->fbcon_par;
434
435 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
436 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
437 !fbcon_cursor_noblink) {
438 if (!info->queue.func)
439 INIT_WORK(&info->queue, fb_flashcursor);
440
441 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
442 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
443 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
444 }
445 }
446
447 static void fbcon_del_cursor_timer(struct fb_info *info)
448 {
449 struct fbcon_ops *ops = info->fbcon_par;
450
451 if (info->queue.func == fb_flashcursor &&
452 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
453 del_timer_sync(&ops->cursor_timer);
454 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
455 }
456 }
457
458 #ifndef MODULE
459 static int __init fb_console_setup(char *this_opt)
460 {
461 char *options;
462 int i, j;
463
464 if (!this_opt || !*this_opt)
465 return 1;
466
467 while ((options = strsep(&this_opt, ",")) != NULL) {
468 if (!strncmp(options, "font:", 5)) {
469 strlcpy(fontname, options + 5, sizeof(fontname));
470 continue;
471 }
472
473 if (!strncmp(options, "scrollback:", 11)) {
474 options += 11;
475 if (*options) {
476 fbcon_softback_size = simple_strtoul(options, &options, 0);
477 if (*options == 'k' || *options == 'K') {
478 fbcon_softback_size *= 1024;
479 }
480 }
481 continue;
482 }
483
484 if (!strncmp(options, "map:", 4)) {
485 options += 4;
486 if (*options) {
487 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
488 if (!options[j])
489 j = 0;
490 con2fb_map_boot[i] =
491 (options[j++]-'0') % FB_MAX;
492 }
493
494 fbcon_map_override();
495 }
496 continue;
497 }
498
499 if (!strncmp(options, "vc:", 3)) {
500 options += 3;
501 if (*options)
502 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
503 if (first_fb_vc < 0)
504 first_fb_vc = 0;
505 if (*options++ == '-')
506 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
507 fbcon_is_default = 0;
508 continue;
509 }
510
511 if (!strncmp(options, "rotate:", 7)) {
512 options += 7;
513 if (*options)
514 initial_rotation = simple_strtoul(options, &options, 0);
515 if (initial_rotation > 3)
516 initial_rotation = 0;
517 continue;
518 }
519
520 if (!strncmp(options, "margin:", 7)) {
521 options += 7;
522 if (*options)
523 margin_color = simple_strtoul(options, &options, 0);
524 continue;
525 }
526 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
527 if (!strcmp(options, "nodefer")) {
528 deferred_takeover = false;
529 continue;
530 }
531 #endif
532
533 if (!strncmp(options, "logo-pos:", 9)) {
534 options += 9;
535 if (!strcmp(options, "center"))
536 fb_center_logo = true;
537 continue;
538 }
539
540 if (!strncmp(options, "logo-count:", 11)) {
541 options += 11;
542 if (*options)
543 fb_logo_count = simple_strtol(options, &options, 0);
544 continue;
545 }
546 }
547 return 1;
548 }
549
550 __setup("fbcon=", fb_console_setup);
551 #endif
552
553 static int search_fb_in_map(int idx)
554 {
555 int i, retval = 0;
556
557 for (i = first_fb_vc; i <= last_fb_vc; i++) {
558 if (con2fb_map[i] == idx)
559 retval = 1;
560 }
561 return retval;
562 }
563
564 static int search_for_mapped_con(void)
565 {
566 int i, retval = 0;
567
568 for (i = first_fb_vc; i <= last_fb_vc; i++) {
569 if (con2fb_map[i] != -1)
570 retval = 1;
571 }
572 return retval;
573 }
574
575 static int do_fbcon_takeover(int show_logo)
576 {
577 int err, i;
578
579 if (!num_registered_fb)
580 return -ENODEV;
581
582 if (!show_logo)
583 logo_shown = FBCON_LOGO_DONTSHOW;
584
585 for (i = first_fb_vc; i <= last_fb_vc; i++)
586 con2fb_map[i] = info_idx;
587
588 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
589 fbcon_is_default);
590
591 if (err) {
592 for (i = first_fb_vc; i <= last_fb_vc; i++)
593 con2fb_map[i] = -1;
594 info_idx = -1;
595 } else {
596 fbcon_has_console_bind = 1;
597 }
598
599 return err;
600 }
601
602 #ifdef MODULE
603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
604 int cols, int rows, int new_cols, int new_rows)
605 {
606 logo_shown = FBCON_LOGO_DONTSHOW;
607 }
608 #else
609 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
610 int cols, int rows, int new_cols, int new_rows)
611 {
612 /* Need to make room for the logo */
613 struct fbcon_ops *ops = info->fbcon_par;
614 int cnt, erase = vc->vc_video_erase_char, step;
615 unsigned short *save = NULL, *r, *q;
616 int logo_height;
617
618 if (info->fbops->owner) {
619 logo_shown = FBCON_LOGO_DONTSHOW;
620 return;
621 }
622
623 /*
624 * remove underline attribute from erase character
625 * if black and white framebuffer.
626 */
627 if (fb_get_color_depth(&info->var, &info->fix) == 1)
628 erase &= ~0x400;
629 logo_height = fb_prepare_logo(info, ops->rotate);
630 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
631 q = (unsigned short *) (vc->vc_origin +
632 vc->vc_size_row * rows);
633 step = logo_lines * cols;
634 for (r = q - logo_lines * cols; r < q; r++)
635 if (scr_readw(r) != vc->vc_video_erase_char)
636 break;
637 if (r != q && new_rows >= rows + logo_lines) {
638 save = kmalloc(array3_size(logo_lines, new_cols, 2),
639 GFP_KERNEL);
640 if (save) {
641 int i = cols < new_cols ? cols : new_cols;
642 scr_memsetw(save, erase, logo_lines * new_cols * 2);
643 r = q - step;
644 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
645 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
646 r = q;
647 }
648 }
649 if (r == q) {
650 /* We can scroll screen down */
651 r = q - step - cols;
652 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
653 scr_memcpyw(r + step, r, vc->vc_size_row);
654 r -= cols;
655 }
656 if (!save) {
657 int lines;
658 if (vc->vc_y + logo_lines >= rows)
659 lines = rows - vc->vc_y - 1;
660 else
661 lines = logo_lines;
662 vc->vc_y += lines;
663 vc->vc_pos += lines * vc->vc_size_row;
664 }
665 }
666 scr_memsetw((unsigned short *) vc->vc_origin,
667 erase,
668 vc->vc_size_row * logo_lines);
669
670 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
671 fbcon_clear_margins(vc, 0);
672 update_screen(vc);
673 }
674
675 if (save) {
676 q = (unsigned short *) (vc->vc_origin +
677 vc->vc_size_row *
678 rows);
679 scr_memcpyw(q, save, logo_lines * new_cols * 2);
680 vc->vc_y += logo_lines;
681 vc->vc_pos += logo_lines * vc->vc_size_row;
682 kfree(save);
683 }
684
685 if (logo_shown == FBCON_LOGO_DONTSHOW)
686 return;
687
688 if (logo_lines > vc->vc_bottom) {
689 logo_shown = FBCON_LOGO_CANSHOW;
690 printk(KERN_INFO
691 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
692 } else {
693 logo_shown = FBCON_LOGO_DRAW;
694 vc->vc_top = logo_lines;
695 }
696 }
697 #endif /* MODULE */
698
699 #ifdef CONFIG_FB_TILEBLITTING
700 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
701 {
702 struct fbcon_ops *ops = info->fbcon_par;
703
704 ops->p = &fb_display[vc->vc_num];
705
706 if ((info->flags & FBINFO_MISC_TILEBLITTING))
707 fbcon_set_tileops(vc, info);
708 else {
709 fbcon_set_rotation(info);
710 fbcon_set_bitops(ops);
711 }
712 }
713
714 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
715 {
716 int err = 0;
717
718 if (info->flags & FBINFO_MISC_TILEBLITTING &&
719 info->tileops->fb_get_tilemax(info) < charcount)
720 err = 1;
721
722 return err;
723 }
724 #else
725 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
726 {
727 struct fbcon_ops *ops = info->fbcon_par;
728
729 info->flags &= ~FBINFO_MISC_TILEBLITTING;
730 ops->p = &fb_display[vc->vc_num];
731 fbcon_set_rotation(info);
732 fbcon_set_bitops(ops);
733 }
734
735 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
736 {
737 return 0;
738 }
739
740 #endif /* CONFIG_MISC_TILEBLITTING */
741
742
743 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
744 int unit, int oldidx)
745 {
746 struct fbcon_ops *ops = NULL;
747 int err = 0;
748
749 if (!try_module_get(info->fbops->owner))
750 err = -ENODEV;
751
752 if (!err && info->fbops->fb_open &&
753 info->fbops->fb_open(info, 0))
754 err = -ENODEV;
755
756 if (!err) {
757 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
758 if (!ops)
759 err = -ENOMEM;
760 }
761
762 if (!err) {
763 ops->cur_blink_jiffies = HZ / 5;
764 ops->info = info;
765 info->fbcon_par = ops;
766
767 if (vc)
768 set_blitting_type(vc, info);
769 }
770
771 if (err) {
772 con2fb_map[unit] = oldidx;
773 module_put(info->fbops->owner);
774 }
775
776 return err;
777 }
778
779 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
780 struct fb_info *newinfo, int unit,
781 int oldidx, int found)
782 {
783 struct fbcon_ops *ops = oldinfo->fbcon_par;
784 int err = 0, ret;
785
786 if (oldinfo->fbops->fb_release &&
787 oldinfo->fbops->fb_release(oldinfo, 0)) {
788 con2fb_map[unit] = oldidx;
789 if (!found && newinfo->fbops->fb_release)
790 newinfo->fbops->fb_release(newinfo, 0);
791 if (!found)
792 module_put(newinfo->fbops->owner);
793 err = -ENODEV;
794 }
795
796 if (!err) {
797 fbcon_del_cursor_timer(oldinfo);
798 kfree(ops->cursor_state.mask);
799 kfree(ops->cursor_data);
800 kfree(ops->cursor_src);
801 kfree(ops->fontbuffer);
802 kfree(oldinfo->fbcon_par);
803 oldinfo->fbcon_par = NULL;
804 module_put(oldinfo->fbops->owner);
805 /*
806 If oldinfo and newinfo are driving the same hardware,
807 the fb_release() method of oldinfo may attempt to
808 restore the hardware state. This will leave the
809 newinfo in an undefined state. Thus, a call to
810 fb_set_par() may be needed for the newinfo.
811 */
812 if (newinfo && newinfo->fbops->fb_set_par) {
813 ret = newinfo->fbops->fb_set_par(newinfo);
814
815 if (ret)
816 printk(KERN_ERR "con2fb_release_oldinfo: "
817 "detected unhandled fb_set_par error, "
818 "error code %d\n", ret);
819 }
820 }
821
822 return err;
823 }
824
825 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
826 int unit, int show_logo)
827 {
828 struct fbcon_ops *ops = info->fbcon_par;
829 int ret;
830
831 ops->currcon = fg_console;
832
833 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
834 ret = info->fbops->fb_set_par(info);
835
836 if (ret)
837 printk(KERN_ERR "con2fb_init_display: detected "
838 "unhandled fb_set_par error, "
839 "error code %d\n", ret);
840 }
841
842 ops->flags |= FBCON_FLAGS_INIT;
843 ops->graphics = 0;
844 fbcon_set_disp(info, &info->var, unit);
845
846 if (show_logo) {
847 struct vc_data *fg_vc = vc_cons[fg_console].d;
848 struct fb_info *fg_info =
849 registered_fb[con2fb_map[fg_console]];
850
851 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
852 fg_vc->vc_rows, fg_vc->vc_cols,
853 fg_vc->vc_rows);
854 }
855
856 update_screen(vc_cons[fg_console].d);
857 }
858
859 /**
860 * set_con2fb_map - map console to frame buffer device
861 * @unit: virtual console number to map
862 * @newidx: frame buffer index to map virtual console to
863 * @user: user request
864 *
865 * Maps a virtual console @unit to a frame buffer device
866 * @newidx.
867 *
868 * This should be called with the console lock held.
869 */
870 static int set_con2fb_map(int unit, int newidx, int user)
871 {
872 struct vc_data *vc = vc_cons[unit].d;
873 int oldidx = con2fb_map[unit];
874 struct fb_info *info = registered_fb[newidx];
875 struct fb_info *oldinfo = NULL;
876 int found, err = 0;
877
878 WARN_CONSOLE_UNLOCKED();
879
880 if (oldidx == newidx)
881 return 0;
882
883 if (!info)
884 return -EINVAL;
885
886 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
887 info_idx = newidx;
888 return do_fbcon_takeover(0);
889 }
890
891 if (oldidx != -1)
892 oldinfo = registered_fb[oldidx];
893
894 found = search_fb_in_map(newidx);
895
896 con2fb_map[unit] = newidx;
897 if (!err && !found)
898 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
899
900 /*
901 * If old fb is not mapped to any of the consoles,
902 * fbcon should release it.
903 */
904 if (!err && oldinfo && !search_fb_in_map(oldidx))
905 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
906 found);
907
908 if (!err) {
909 int show_logo = (fg_console == 0 && !user &&
910 logo_shown != FBCON_LOGO_DONTSHOW);
911
912 if (!found)
913 fbcon_add_cursor_timer(info);
914 con2fb_map_boot[unit] = newidx;
915 con2fb_init_display(vc, info, unit, show_logo);
916 }
917
918 if (!search_fb_in_map(info_idx))
919 info_idx = newidx;
920
921 return err;
922 }
923
924 /*
925 * Low Level Operations
926 */
927 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
928 static int var_to_display(struct fbcon_display *disp,
929 struct fb_var_screeninfo *var,
930 struct fb_info *info)
931 {
932 disp->xres_virtual = var->xres_virtual;
933 disp->yres_virtual = var->yres_virtual;
934 disp->bits_per_pixel = var->bits_per_pixel;
935 disp->grayscale = var->grayscale;
936 disp->nonstd = var->nonstd;
937 disp->accel_flags = var->accel_flags;
938 disp->height = var->height;
939 disp->width = var->width;
940 disp->red = var->red;
941 disp->green = var->green;
942 disp->blue = var->blue;
943 disp->transp = var->transp;
944 disp->rotate = var->rotate;
945 disp->mode = fb_match_mode(var, &info->modelist);
946 if (disp->mode == NULL)
947 /* This should not happen */
948 return -EINVAL;
949 return 0;
950 }
951
952 static void display_to_var(struct fb_var_screeninfo *var,
953 struct fbcon_display *disp)
954 {
955 fb_videomode_to_var(var, disp->mode);
956 var->xres_virtual = disp->xres_virtual;
957 var->yres_virtual = disp->yres_virtual;
958 var->bits_per_pixel = disp->bits_per_pixel;
959 var->grayscale = disp->grayscale;
960 var->nonstd = disp->nonstd;
961 var->accel_flags = disp->accel_flags;
962 var->height = disp->height;
963 var->width = disp->width;
964 var->red = disp->red;
965 var->green = disp->green;
966 var->blue = disp->blue;
967 var->transp = disp->transp;
968 var->rotate = disp->rotate;
969 }
970
971 static const char *fbcon_startup(void)
972 {
973 const char *display_desc = "frame buffer device";
974 struct fbcon_display *p = &fb_display[fg_console];
975 struct vc_data *vc = vc_cons[fg_console].d;
976 const struct font_desc *font = NULL;
977 struct module *owner;
978 struct fb_info *info = NULL;
979 struct fbcon_ops *ops;
980 int rows, cols;
981
982 /*
983 * If num_registered_fb is zero, this is a call for the dummy part.
984 * The frame buffer devices weren't initialized yet.
985 */
986 if (!num_registered_fb || info_idx == -1)
987 return display_desc;
988 /*
989 * Instead of blindly using registered_fb[0], we use info_idx, set by
990 * fb_console_init();
991 */
992 info = registered_fb[info_idx];
993 if (!info)
994 return NULL;
995
996 owner = info->fbops->owner;
997 if (!try_module_get(owner))
998 return NULL;
999 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
1000 module_put(owner);
1001 return NULL;
1002 }
1003
1004 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1005 if (!ops) {
1006 module_put(owner);
1007 return NULL;
1008 }
1009
1010 ops->currcon = -1;
1011 ops->graphics = 1;
1012 ops->cur_rotate = -1;
1013 ops->cur_blink_jiffies = HZ / 5;
1014 ops->info = info;
1015 info->fbcon_par = ops;
1016
1017 p->con_rotate = initial_rotation;
1018 if (p->con_rotate == -1)
1019 p->con_rotate = info->fbcon_rotate_hint;
1020 if (p->con_rotate == -1)
1021 p->con_rotate = FB_ROTATE_UR;
1022
1023 set_blitting_type(vc, info);
1024
1025 if (info->fix.type != FB_TYPE_TEXT) {
1026 if (fbcon_softback_size) {
1027 if (!softback_buf) {
1028 softback_buf =
1029 (unsigned long)
1030 kvmalloc(fbcon_softback_size,
1031 GFP_KERNEL);
1032 if (!softback_buf) {
1033 fbcon_softback_size = 0;
1034 softback_top = 0;
1035 }
1036 }
1037 } else {
1038 if (softback_buf) {
1039 kvfree((void *) softback_buf);
1040 softback_buf = 0;
1041 softback_top = 0;
1042 }
1043 }
1044 if (softback_buf)
1045 softback_in = softback_top = softback_curr =
1046 softback_buf;
1047 softback_lines = 0;
1048 }
1049
1050 /* Setup default font */
1051 if (!p->fontdata && !vc->vc_font.data) {
1052 if (!fontname[0] || !(font = find_font(fontname)))
1053 font = get_default_font(info->var.xres,
1054 info->var.yres,
1055 info->pixmap.blit_x,
1056 info->pixmap.blit_y);
1057 vc->vc_font.width = font->width;
1058 vc->vc_font.height = font->height;
1059 vc->vc_font.data = (void *)(p->fontdata = font->data);
1060 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1061 } else {
1062 p->fontdata = vc->vc_font.data;
1063 }
1064
1065 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1066 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1067 cols /= vc->vc_font.width;
1068 rows /= vc->vc_font.height;
1069 vc_resize(vc, cols, rows);
1070
1071 DPRINTK("mode: %s\n", info->fix.id);
1072 DPRINTK("visual: %d\n", info->fix.visual);
1073 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1074 info->var.yres,
1075 info->var.bits_per_pixel);
1076
1077 fbcon_add_cursor_timer(info);
1078 return display_desc;
1079 }
1080
1081 static void fbcon_init(struct vc_data *vc, int init)
1082 {
1083 struct fb_info *info;
1084 struct fbcon_ops *ops;
1085 struct vc_data **default_mode = vc->vc_display_fg;
1086 struct vc_data *svc = *default_mode;
1087 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1088 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1089 int cap, ret;
1090
1091 if (WARN_ON(info_idx == -1))
1092 return;
1093
1094 if (con2fb_map[vc->vc_num] == -1)
1095 con2fb_map[vc->vc_num] = info_idx;
1096
1097 info = registered_fb[con2fb_map[vc->vc_num]];
1098 cap = info->flags;
1099
1100 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1101 logo_shown = FBCON_LOGO_DONTSHOW;
1102
1103 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1104 (info->fix.type == FB_TYPE_TEXT))
1105 logo = 0;
1106
1107 if (var_to_display(p, &info->var, info))
1108 return;
1109
1110 if (!info->fbcon_par)
1111 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1112
1113 /* If we are not the first console on this
1114 fb, copy the font from that console */
1115 t = &fb_display[fg_console];
1116 if (!p->fontdata) {
1117 if (t->fontdata) {
1118 struct vc_data *fvc = vc_cons[fg_console].d;
1119
1120 vc->vc_font.data = (void *)(p->fontdata =
1121 fvc->vc_font.data);
1122 vc->vc_font.width = fvc->vc_font.width;
1123 vc->vc_font.height = fvc->vc_font.height;
1124 p->userfont = t->userfont;
1125
1126 if (p->userfont)
1127 REFCOUNT(p->fontdata)++;
1128 } else {
1129 const struct font_desc *font = NULL;
1130
1131 if (!fontname[0] || !(font = find_font(fontname)))
1132 font = get_default_font(info->var.xres,
1133 info->var.yres,
1134 info->pixmap.blit_x,
1135 info->pixmap.blit_y);
1136 vc->vc_font.width = font->width;
1137 vc->vc_font.height = font->height;
1138 vc->vc_font.data = (void *)(p->fontdata = font->data);
1139 vc->vc_font.charcount = 256; /* FIXME Need to
1140 support more fonts */
1141 }
1142 }
1143
1144 if (p->userfont)
1145 charcnt = FNTCHARCNT(p->fontdata);
1146
1147 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1148 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1149 if (charcnt == 256) {
1150 vc->vc_hi_font_mask = 0;
1151 } else {
1152 vc->vc_hi_font_mask = 0x100;
1153 if (vc->vc_can_do_color)
1154 vc->vc_complement_mask <<= 1;
1155 }
1156
1157 if (!*svc->vc_uni_pagedir_loc)
1158 con_set_default_unimap(svc);
1159 if (!*vc->vc_uni_pagedir_loc)
1160 con_copy_unimap(vc, svc);
1161
1162 ops = info->fbcon_par;
1163 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1164
1165 p->con_rotate = initial_rotation;
1166 if (p->con_rotate == -1)
1167 p->con_rotate = info->fbcon_rotate_hint;
1168 if (p->con_rotate == -1)
1169 p->con_rotate = FB_ROTATE_UR;
1170
1171 set_blitting_type(vc, info);
1172
1173 cols = vc->vc_cols;
1174 rows = vc->vc_rows;
1175 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1176 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1177 new_cols /= vc->vc_font.width;
1178 new_rows /= vc->vc_font.height;
1179
1180 /*
1181 * We must always set the mode. The mode of the previous console
1182 * driver could be in the same resolution but we are using different
1183 * hardware so we have to initialize the hardware.
1184 *
1185 * We need to do it in fbcon_init() to prevent screen corruption.
1186 */
1187 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1188 if (info->fbops->fb_set_par &&
1189 !(ops->flags & FBCON_FLAGS_INIT)) {
1190 ret = info->fbops->fb_set_par(info);
1191
1192 if (ret)
1193 printk(KERN_ERR "fbcon_init: detected "
1194 "unhandled fb_set_par error, "
1195 "error code %d\n", ret);
1196 }
1197
1198 ops->flags |= FBCON_FLAGS_INIT;
1199 }
1200
1201 ops->graphics = 0;
1202
1203 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1204 !(cap & FBINFO_HWACCEL_DISABLED))
1205 p->scrollmode = SCROLL_MOVE;
1206 else /* default to something safe */
1207 p->scrollmode = SCROLL_REDRAW;
1208
1209 /*
1210 * ++guenther: console.c:vc_allocate() relies on initializing
1211 * vc_{cols,rows}, but we must not set those if we are only
1212 * resizing the console.
1213 */
1214 if (init) {
1215 vc->vc_cols = new_cols;
1216 vc->vc_rows = new_rows;
1217 } else
1218 vc_resize(vc, new_cols, new_rows);
1219
1220 if (logo)
1221 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1222
1223 if (vc == svc && softback_buf)
1224 fbcon_update_softback(vc);
1225
1226 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1227 ops->rotate = FB_ROTATE_UR;
1228 set_blitting_type(vc, info);
1229 }
1230
1231 ops->p = &fb_display[fg_console];
1232 }
1233
1234 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1235 {
1236 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1237 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1238 p->fontdata = NULL;
1239 p->userfont = 0;
1240 }
1241
1242 static void set_vc_hi_font(struct vc_data *vc, bool set);
1243
1244 static void fbcon_deinit(struct vc_data *vc)
1245 {
1246 struct fbcon_display *p = &fb_display[vc->vc_num];
1247 struct fb_info *info;
1248 struct fbcon_ops *ops;
1249 int idx;
1250 bool free_font = true;
1251
1252 idx = con2fb_map[vc->vc_num];
1253
1254 if (idx == -1)
1255 goto finished;
1256
1257 info = registered_fb[idx];
1258
1259 if (!info)
1260 goto finished;
1261
1262 if (info->flags & FBINFO_MISC_FIRMWARE)
1263 free_font = false;
1264 ops = info->fbcon_par;
1265
1266 if (!ops)
1267 goto finished;
1268
1269 if (con_is_visible(vc))
1270 fbcon_del_cursor_timer(info);
1271
1272 ops->flags &= ~FBCON_FLAGS_INIT;
1273 finished:
1274
1275 fbcon_free_font(p, free_font);
1276 if (free_font)
1277 vc->vc_font.data = NULL;
1278
1279 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1280 set_vc_hi_font(vc, false);
1281
1282 if (!con_is_bound(&fb_con))
1283 fbcon_exit();
1284
1285 if (vc->vc_num == logo_shown)
1286 logo_shown = FBCON_LOGO_CANSHOW;
1287
1288 return;
1289 }
1290
1291 /* ====================================================================== */
1292
1293 /* fbcon_XXX routines - interface used by the world
1294 *
1295 * This system is now divided into two levels because of complications
1296 * caused by hardware scrolling. Top level functions:
1297 *
1298 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1299 *
1300 * handles y values in range [0, scr_height-1] that correspond to real
1301 * screen positions. y_wrap shift means that first line of bitmap may be
1302 * anywhere on this display. These functions convert lineoffsets to
1303 * bitmap offsets and deal with the wrap-around case by splitting blits.
1304 *
1305 * fbcon_bmove_physical_8() -- These functions fast implementations
1306 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1307 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1308 *
1309 * WARNING:
1310 *
1311 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1312 * Implies should only really hardware scroll in rows. Only reason for
1313 * restriction is simplicity & efficiency at the moment.
1314 */
1315
1316 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1317 int width)
1318 {
1319 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1320 struct fbcon_ops *ops = info->fbcon_par;
1321
1322 struct fbcon_display *p = &fb_display[vc->vc_num];
1323 u_int y_break;
1324
1325 if (fbcon_is_inactive(vc, info))
1326 return;
1327
1328 if (!height || !width)
1329 return;
1330
1331 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1332 vc->vc_top = 0;
1333 /*
1334 * If the font dimensions are not an integral of the display
1335 * dimensions then the ops->clear below won't end up clearing
1336 * the margins. Call clear_margins here in case the logo
1337 * bitmap stretched into the margin area.
1338 */
1339 fbcon_clear_margins(vc, 0);
1340 }
1341
1342 /* Split blits that cross physical y_wrap boundary */
1343
1344 y_break = p->vrows - p->yscroll;
1345 if (sy < y_break && sy + height - 1 >= y_break) {
1346 u_int b = y_break - sy;
1347 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1348 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1349 width);
1350 } else
1351 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1352 }
1353
1354 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1355 int count, int ypos, int xpos)
1356 {
1357 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1358 struct fbcon_display *p = &fb_display[vc->vc_num];
1359 struct fbcon_ops *ops = info->fbcon_par;
1360
1361 if (!fbcon_is_inactive(vc, info))
1362 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1363 get_color(vc, info, scr_readw(s), 1),
1364 get_color(vc, info, scr_readw(s), 0));
1365 }
1366
1367 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1368 {
1369 unsigned short chr;
1370
1371 scr_writew(c, &chr);
1372 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1373 }
1374
1375 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1376 {
1377 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1378 struct fbcon_ops *ops = info->fbcon_par;
1379
1380 if (!fbcon_is_inactive(vc, info))
1381 ops->clear_margins(vc, info, margin_color, bottom_only);
1382 }
1383
1384 static void fbcon_cursor(struct vc_data *vc, int mode)
1385 {
1386 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1387 struct fbcon_ops *ops = info->fbcon_par;
1388 int y;
1389 int c = scr_readw((u16 *) vc->vc_pos);
1390
1391 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1392
1393 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1394 return;
1395
1396 if (vc->vc_cursor_type & 0x10)
1397 fbcon_del_cursor_timer(info);
1398 else
1399 fbcon_add_cursor_timer(info);
1400
1401 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1402 if (mode & CM_SOFTBACK) {
1403 mode &= ~CM_SOFTBACK;
1404 y = softback_lines;
1405 } else {
1406 if (softback_lines)
1407 fbcon_set_origin(vc);
1408 y = 0;
1409 }
1410
1411 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1412 get_color(vc, info, c, 0));
1413 }
1414
1415 static int scrollback_phys_max = 0;
1416 static int scrollback_max = 0;
1417 static int scrollback_current = 0;
1418
1419 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1420 int unit)
1421 {
1422 struct fbcon_display *p, *t;
1423 struct vc_data **default_mode, *vc;
1424 struct vc_data *svc;
1425 struct fbcon_ops *ops = info->fbcon_par;
1426 int rows, cols, charcnt = 256;
1427
1428 p = &fb_display[unit];
1429
1430 if (var_to_display(p, var, info))
1431 return;
1432
1433 vc = vc_cons[unit].d;
1434
1435 if (!vc)
1436 return;
1437
1438 default_mode = vc->vc_display_fg;
1439 svc = *default_mode;
1440 t = &fb_display[svc->vc_num];
1441
1442 if (!vc->vc_font.data) {
1443 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1444 vc->vc_font.width = (*default_mode)->vc_font.width;
1445 vc->vc_font.height = (*default_mode)->vc_font.height;
1446 p->userfont = t->userfont;
1447 if (p->userfont)
1448 REFCOUNT(p->fontdata)++;
1449 }
1450 if (p->userfont)
1451 charcnt = FNTCHARCNT(p->fontdata);
1452
1453 var->activate = FB_ACTIVATE_NOW;
1454 info->var.activate = var->activate;
1455 var->yoffset = info->var.yoffset;
1456 var->xoffset = info->var.xoffset;
1457 fb_set_var(info, var);
1458 ops->var = info->var;
1459 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1460 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1461 if (charcnt == 256) {
1462 vc->vc_hi_font_mask = 0;
1463 } else {
1464 vc->vc_hi_font_mask = 0x100;
1465 if (vc->vc_can_do_color)
1466 vc->vc_complement_mask <<= 1;
1467 }
1468
1469 if (!*svc->vc_uni_pagedir_loc)
1470 con_set_default_unimap(svc);
1471 if (!*vc->vc_uni_pagedir_loc)
1472 con_copy_unimap(vc, svc);
1473
1474 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1475 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1476 cols /= vc->vc_font.width;
1477 rows /= vc->vc_font.height;
1478 vc_resize(vc, cols, rows);
1479
1480 if (con_is_visible(vc)) {
1481 update_screen(vc);
1482 if (softback_buf)
1483 fbcon_update_softback(vc);
1484 }
1485 }
1486
1487 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1488 {
1489 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1490 struct fbcon_ops *ops = info->fbcon_par;
1491 struct fbcon_display *p = &fb_display[vc->vc_num];
1492
1493 p->yscroll += count;
1494 if (p->yscroll >= p->vrows) /* Deal with wrap */
1495 p->yscroll -= p->vrows;
1496 ops->var.xoffset = 0;
1497 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1498 ops->var.vmode |= FB_VMODE_YWRAP;
1499 ops->update_start(info);
1500 scrollback_max += count;
1501 if (scrollback_max > scrollback_phys_max)
1502 scrollback_max = scrollback_phys_max;
1503 scrollback_current = 0;
1504 }
1505
1506 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1507 {
1508 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1509 struct fbcon_ops *ops = info->fbcon_par;
1510 struct fbcon_display *p = &fb_display[vc->vc_num];
1511
1512 p->yscroll -= count;
1513 if (p->yscroll < 0) /* Deal with wrap */
1514 p->yscroll += p->vrows;
1515 ops->var.xoffset = 0;
1516 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1517 ops->var.vmode |= FB_VMODE_YWRAP;
1518 ops->update_start(info);
1519 scrollback_max -= count;
1520 if (scrollback_max < 0)
1521 scrollback_max = 0;
1522 scrollback_current = 0;
1523 }
1524
1525 static __inline__ void ypan_up(struct vc_data *vc, int count)
1526 {
1527 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1528 struct fbcon_display *p = &fb_display[vc->vc_num];
1529 struct fbcon_ops *ops = info->fbcon_par;
1530
1531 p->yscroll += count;
1532 if (p->yscroll > p->vrows - vc->vc_rows) {
1533 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1534 0, 0, 0, vc->vc_rows, vc->vc_cols);
1535 p->yscroll -= p->vrows - vc->vc_rows;
1536 }
1537
1538 ops->var.xoffset = 0;
1539 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1540 ops->var.vmode &= ~FB_VMODE_YWRAP;
1541 ops->update_start(info);
1542 fbcon_clear_margins(vc, 1);
1543 scrollback_max += count;
1544 if (scrollback_max > scrollback_phys_max)
1545 scrollback_max = scrollback_phys_max;
1546 scrollback_current = 0;
1547 }
1548
1549 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1550 {
1551 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1552 struct fbcon_ops *ops = info->fbcon_par;
1553 struct fbcon_display *p = &fb_display[vc->vc_num];
1554
1555 p->yscroll += count;
1556
1557 if (p->yscroll > p->vrows - vc->vc_rows) {
1558 p->yscroll -= p->vrows - vc->vc_rows;
1559 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1560 }
1561
1562 ops->var.xoffset = 0;
1563 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1564 ops->var.vmode &= ~FB_VMODE_YWRAP;
1565 ops->update_start(info);
1566 fbcon_clear_margins(vc, 1);
1567 scrollback_max += count;
1568 if (scrollback_max > scrollback_phys_max)
1569 scrollback_max = scrollback_phys_max;
1570 scrollback_current = 0;
1571 }
1572
1573 static __inline__ void ypan_down(struct vc_data *vc, int count)
1574 {
1575 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1576 struct fbcon_display *p = &fb_display[vc->vc_num];
1577 struct fbcon_ops *ops = info->fbcon_par;
1578
1579 p->yscroll -= count;
1580 if (p->yscroll < 0) {
1581 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1582 0, vc->vc_rows, vc->vc_cols);
1583 p->yscroll += p->vrows - vc->vc_rows;
1584 }
1585
1586 ops->var.xoffset = 0;
1587 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1588 ops->var.vmode &= ~FB_VMODE_YWRAP;
1589 ops->update_start(info);
1590 fbcon_clear_margins(vc, 1);
1591 scrollback_max -= count;
1592 if (scrollback_max < 0)
1593 scrollback_max = 0;
1594 scrollback_current = 0;
1595 }
1596
1597 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1598 {
1599 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1600 struct fbcon_ops *ops = info->fbcon_par;
1601 struct fbcon_display *p = &fb_display[vc->vc_num];
1602
1603 p->yscroll -= count;
1604
1605 if (p->yscroll < 0) {
1606 p->yscroll += p->vrows - vc->vc_rows;
1607 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1608 }
1609
1610 ops->var.xoffset = 0;
1611 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1612 ops->var.vmode &= ~FB_VMODE_YWRAP;
1613 ops->update_start(info);
1614 fbcon_clear_margins(vc, 1);
1615 scrollback_max -= count;
1616 if (scrollback_max < 0)
1617 scrollback_max = 0;
1618 scrollback_current = 0;
1619 }
1620
1621 static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
1622 long delta)
1623 {
1624 int count = vc->vc_rows;
1625 unsigned short *d, *s;
1626 unsigned long n;
1627 int line = 0;
1628
1629 d = (u16 *) softback_curr;
1630 if (d == (u16 *) softback_in)
1631 d = (u16 *) vc->vc_origin;
1632 n = softback_curr + delta * vc->vc_size_row;
1633 softback_lines -= delta;
1634 if (delta < 0) {
1635 if (softback_curr < softback_top && n < softback_buf) {
1636 n += softback_end - softback_buf;
1637 if (n < softback_top) {
1638 softback_lines -=
1639 (softback_top - n) / vc->vc_size_row;
1640 n = softback_top;
1641 }
1642 } else if (softback_curr >= softback_top
1643 && n < softback_top) {
1644 softback_lines -=
1645 (softback_top - n) / vc->vc_size_row;
1646 n = softback_top;
1647 }
1648 } else {
1649 if (softback_curr > softback_in && n >= softback_end) {
1650 n += softback_buf - softback_end;
1651 if (n > softback_in) {
1652 n = softback_in;
1653 softback_lines = 0;
1654 }
1655 } else if (softback_curr <= softback_in && n > softback_in) {
1656 n = softback_in;
1657 softback_lines = 0;
1658 }
1659 }
1660 if (n == softback_curr)
1661 return;
1662 softback_curr = n;
1663 s = (u16 *) softback_curr;
1664 if (s == (u16 *) softback_in)
1665 s = (u16 *) vc->vc_origin;
1666 while (count--) {
1667 unsigned short *start;
1668 unsigned short *le;
1669 unsigned short c;
1670 int x = 0;
1671 unsigned short attr = 1;
1672
1673 start = s;
1674 le = advance_row(s, 1);
1675 do {
1676 c = scr_readw(s);
1677 if (attr != (c & 0xff00)) {
1678 attr = c & 0xff00;
1679 if (s > start) {
1680 fbcon_putcs(vc, start, s - start,
1681 line, x);
1682 x += s - start;
1683 start = s;
1684 }
1685 }
1686 if (c == scr_readw(d)) {
1687 if (s > start) {
1688 fbcon_putcs(vc, start, s - start,
1689 line, x);
1690 x += s - start + 1;
1691 start = s + 1;
1692 } else {
1693 x++;
1694 start++;
1695 }
1696 }
1697 s++;
1698 d++;
1699 } while (s < le);
1700 if (s > start)
1701 fbcon_putcs(vc, start, s - start, line, x);
1702 line++;
1703 if (d == (u16 *) softback_end)
1704 d = (u16 *) softback_buf;
1705 if (d == (u16 *) softback_in)
1706 d = (u16 *) vc->vc_origin;
1707 if (s == (u16 *) softback_end)
1708 s = (u16 *) softback_buf;
1709 if (s == (u16 *) softback_in)
1710 s = (u16 *) vc->vc_origin;
1711 }
1712 }
1713
1714 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1715 int line, int count, int dy)
1716 {
1717 unsigned short *s = (unsigned short *)
1718 (vc->vc_origin + vc->vc_size_row * line);
1719
1720 while (count--) {
1721 unsigned short *start = s;
1722 unsigned short *le = advance_row(s, 1);
1723 unsigned short c;
1724 int x = 0;
1725 unsigned short attr = 1;
1726
1727 do {
1728 c = scr_readw(s);
1729 if (attr != (c & 0xff00)) {
1730 attr = c & 0xff00;
1731 if (s > start) {
1732 fbcon_putcs(vc, start, s - start,
1733 dy, x);
1734 x += s - start;
1735 start = s;
1736 }
1737 }
1738 console_conditional_schedule();
1739 s++;
1740 } while (s < le);
1741 if (s > start)
1742 fbcon_putcs(vc, start, s - start, dy, x);
1743 console_conditional_schedule();
1744 dy++;
1745 }
1746 }
1747
1748 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1749 struct fbcon_display *p, int line, int count, int ycount)
1750 {
1751 int offset = ycount * vc->vc_cols;
1752 unsigned short *d = (unsigned short *)
1753 (vc->vc_origin + vc->vc_size_row * line);
1754 unsigned short *s = d + offset;
1755 struct fbcon_ops *ops = info->fbcon_par;
1756
1757 while (count--) {
1758 unsigned short *start = s;
1759 unsigned short *le = advance_row(s, 1);
1760 unsigned short c;
1761 int x = 0;
1762
1763 do {
1764 c = scr_readw(s);
1765
1766 if (c == scr_readw(d)) {
1767 if (s > start) {
1768 ops->bmove(vc, info, line + ycount, x,
1769 line, x, 1, s-start);
1770 x += s - start + 1;
1771 start = s + 1;
1772 } else {
1773 x++;
1774 start++;
1775 }
1776 }
1777
1778 scr_writew(c, d);
1779 console_conditional_schedule();
1780 s++;
1781 d++;
1782 } while (s < le);
1783 if (s > start)
1784 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1785 s-start);
1786 console_conditional_schedule();
1787 if (ycount > 0)
1788 line++;
1789 else {
1790 line--;
1791 /* NOTE: We subtract two lines from these pointers */
1792 s -= vc->vc_size_row;
1793 d -= vc->vc_size_row;
1794 }
1795 }
1796 }
1797
1798 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1799 int line, int count, int offset)
1800 {
1801 unsigned short *d = (unsigned short *)
1802 (vc->vc_origin + vc->vc_size_row * line);
1803 unsigned short *s = d + offset;
1804
1805 while (count--) {
1806 unsigned short *start = s;
1807 unsigned short *le = advance_row(s, 1);
1808 unsigned short c;
1809 int x = 0;
1810 unsigned short attr = 1;
1811
1812 do {
1813 c = scr_readw(s);
1814 if (attr != (c & 0xff00)) {
1815 attr = c & 0xff00;
1816 if (s > start) {
1817 fbcon_putcs(vc, start, s - start,
1818 line, x);
1819 x += s - start;
1820 start = s;
1821 }
1822 }
1823 if (c == scr_readw(d)) {
1824 if (s > start) {
1825 fbcon_putcs(vc, start, s - start,
1826 line, x);
1827 x += s - start + 1;
1828 start = s + 1;
1829 } else {
1830 x++;
1831 start++;
1832 }
1833 }
1834 scr_writew(c, d);
1835 console_conditional_schedule();
1836 s++;
1837 d++;
1838 } while (s < le);
1839 if (s > start)
1840 fbcon_putcs(vc, start, s - start, line, x);
1841 console_conditional_schedule();
1842 if (offset > 0)
1843 line++;
1844 else {
1845 line--;
1846 /* NOTE: We subtract two lines from these pointers */
1847 s -= vc->vc_size_row;
1848 d -= vc->vc_size_row;
1849 }
1850 }
1851 }
1852
1853 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1854 int count)
1855 {
1856 unsigned short *p;
1857
1858 if (vc->vc_num != fg_console)
1859 return;
1860 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1861
1862 while (count) {
1863 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1864 count--;
1865 p = advance_row(p, 1);
1866 softback_in += vc->vc_size_row;
1867 if (softback_in == softback_end)
1868 softback_in = softback_buf;
1869 if (softback_in == softback_top) {
1870 softback_top += vc->vc_size_row;
1871 if (softback_top == softback_end)
1872 softback_top = softback_buf;
1873 }
1874 }
1875 softback_curr = softback_in;
1876 }
1877
1878 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1879 enum con_scroll dir, unsigned int count)
1880 {
1881 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1882 struct fbcon_display *p = &fb_display[vc->vc_num];
1883 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1884
1885 if (fbcon_is_inactive(vc, info))
1886 return true;
1887
1888 fbcon_cursor(vc, CM_ERASE);
1889
1890 /*
1891 * ++Geert: Only use ywrap/ypan if the console is in text mode
1892 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1893 * whole screen (prevents flicker).
1894 */
1895
1896 switch (dir) {
1897 case SM_UP:
1898 if (count > vc->vc_rows) /* Maximum realistic size */
1899 count = vc->vc_rows;
1900 if (softback_top)
1901 fbcon_softback_note(vc, t, count);
1902 if (logo_shown >= 0)
1903 goto redraw_up;
1904 switch (p->scrollmode) {
1905 case SCROLL_MOVE:
1906 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1907 count);
1908 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1909 scr_memsetw((unsigned short *) (vc->vc_origin +
1910 vc->vc_size_row *
1911 (b - count)),
1912 vc->vc_video_erase_char,
1913 vc->vc_size_row * count);
1914 return true;
1915 break;
1916
1917 case SCROLL_WRAP_MOVE:
1918 if (b - t - count > 3 * vc->vc_rows >> 2) {
1919 if (t > 0)
1920 fbcon_bmove(vc, 0, 0, count, 0, t,
1921 vc->vc_cols);
1922 ywrap_up(vc, count);
1923 if (vc->vc_rows - b > 0)
1924 fbcon_bmove(vc, b - count, 0, b, 0,
1925 vc->vc_rows - b,
1926 vc->vc_cols);
1927 } else if (info->flags & FBINFO_READS_FAST)
1928 fbcon_bmove(vc, t + count, 0, t, 0,
1929 b - t - count, vc->vc_cols);
1930 else
1931 goto redraw_up;
1932 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1933 break;
1934
1935 case SCROLL_PAN_REDRAW:
1936 if ((p->yscroll + count <=
1937 2 * (p->vrows - vc->vc_rows))
1938 && ((!scroll_partial && (b - t == vc->vc_rows))
1939 || (scroll_partial
1940 && (b - t - count >
1941 3 * vc->vc_rows >> 2)))) {
1942 if (t > 0)
1943 fbcon_redraw_move(vc, p, 0, t, count);
1944 ypan_up_redraw(vc, t, count);
1945 if (vc->vc_rows - b > 0)
1946 fbcon_redraw_move(vc, p, b,
1947 vc->vc_rows - b, b);
1948 } else
1949 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1950 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1951 break;
1952
1953 case SCROLL_PAN_MOVE:
1954 if ((p->yscroll + count <=
1955 2 * (p->vrows - vc->vc_rows))
1956 && ((!scroll_partial && (b - t == vc->vc_rows))
1957 || (scroll_partial
1958 && (b - t - count >
1959 3 * vc->vc_rows >> 2)))) {
1960 if (t > 0)
1961 fbcon_bmove(vc, 0, 0, count, 0, t,
1962 vc->vc_cols);
1963 ypan_up(vc, count);
1964 if (vc->vc_rows - b > 0)
1965 fbcon_bmove(vc, b - count, 0, b, 0,
1966 vc->vc_rows - b,
1967 vc->vc_cols);
1968 } else if (info->flags & FBINFO_READS_FAST)
1969 fbcon_bmove(vc, t + count, 0, t, 0,
1970 b - t - count, vc->vc_cols);
1971 else
1972 goto redraw_up;
1973 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1974 break;
1975
1976 case SCROLL_REDRAW:
1977 redraw_up:
1978 fbcon_redraw(vc, p, t, b - t - count,
1979 count * vc->vc_cols);
1980 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1981 scr_memsetw((unsigned short *) (vc->vc_origin +
1982 vc->vc_size_row *
1983 (b - count)),
1984 vc->vc_video_erase_char,
1985 vc->vc_size_row * count);
1986 return true;
1987 }
1988 break;
1989
1990 case SM_DOWN:
1991 if (count > vc->vc_rows) /* Maximum realistic size */
1992 count = vc->vc_rows;
1993 if (logo_shown >= 0)
1994 goto redraw_down;
1995 switch (p->scrollmode) {
1996 case SCROLL_MOVE:
1997 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1998 -count);
1999 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2000 scr_memsetw((unsigned short *) (vc->vc_origin +
2001 vc->vc_size_row *
2002 t),
2003 vc->vc_video_erase_char,
2004 vc->vc_size_row * count);
2005 return true;
2006 break;
2007
2008 case SCROLL_WRAP_MOVE:
2009 if (b - t - count > 3 * vc->vc_rows >> 2) {
2010 if (vc->vc_rows - b > 0)
2011 fbcon_bmove(vc, b, 0, b - count, 0,
2012 vc->vc_rows - b,
2013 vc->vc_cols);
2014 ywrap_down(vc, count);
2015 if (t > 0)
2016 fbcon_bmove(vc, count, 0, 0, 0, t,
2017 vc->vc_cols);
2018 } else if (info->flags & FBINFO_READS_FAST)
2019 fbcon_bmove(vc, t, 0, t + count, 0,
2020 b - t - count, vc->vc_cols);
2021 else
2022 goto redraw_down;
2023 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2024 break;
2025
2026 case SCROLL_PAN_MOVE:
2027 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2028 && ((!scroll_partial && (b - t == vc->vc_rows))
2029 || (scroll_partial
2030 && (b - t - count >
2031 3 * vc->vc_rows >> 2)))) {
2032 if (vc->vc_rows - b > 0)
2033 fbcon_bmove(vc, b, 0, b - count, 0,
2034 vc->vc_rows - b,
2035 vc->vc_cols);
2036 ypan_down(vc, count);
2037 if (t > 0)
2038 fbcon_bmove(vc, count, 0, 0, 0, t,
2039 vc->vc_cols);
2040 } else if (info->flags & FBINFO_READS_FAST)
2041 fbcon_bmove(vc, t, 0, t + count, 0,
2042 b - t - count, vc->vc_cols);
2043 else
2044 goto redraw_down;
2045 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2046 break;
2047
2048 case SCROLL_PAN_REDRAW:
2049 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2050 && ((!scroll_partial && (b - t == vc->vc_rows))
2051 || (scroll_partial
2052 && (b - t - count >
2053 3 * vc->vc_rows >> 2)))) {
2054 if (vc->vc_rows - b > 0)
2055 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2056 b - count);
2057 ypan_down_redraw(vc, t, count);
2058 if (t > 0)
2059 fbcon_redraw_move(vc, p, count, t, 0);
2060 } else
2061 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2062 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2063 break;
2064
2065 case SCROLL_REDRAW:
2066 redraw_down:
2067 fbcon_redraw(vc, p, b - 1, b - t - count,
2068 -count * vc->vc_cols);
2069 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2070 scr_memsetw((unsigned short *) (vc->vc_origin +
2071 vc->vc_size_row *
2072 t),
2073 vc->vc_video_erase_char,
2074 vc->vc_size_row * count);
2075 return true;
2076 }
2077 }
2078 return false;
2079 }
2080
2081
2082 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2083 int height, int width)
2084 {
2085 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2086 struct fbcon_display *p = &fb_display[vc->vc_num];
2087
2088 if (fbcon_is_inactive(vc, info))
2089 return;
2090
2091 if (!width || !height)
2092 return;
2093
2094 /* Split blits that cross physical y_wrap case.
2095 * Pathological case involves 4 blits, better to use recursive
2096 * code rather than unrolled case
2097 *
2098 * Recursive invocations don't need to erase the cursor over and
2099 * over again, so we use fbcon_bmove_rec()
2100 */
2101 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2102 p->vrows - p->yscroll);
2103 }
2104
2105 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
2106 int dy, int dx, int height, int width, u_int y_break)
2107 {
2108 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2109 struct fbcon_ops *ops = info->fbcon_par;
2110 u_int b;
2111
2112 if (sy < y_break && sy + height > y_break) {
2113 b = y_break - sy;
2114 if (dy < sy) { /* Avoid trashing self */
2115 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2116 y_break);
2117 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2118 height - b, width, y_break);
2119 } else {
2120 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2121 height - b, width, y_break);
2122 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2123 y_break);
2124 }
2125 return;
2126 }
2127
2128 if (dy < y_break && dy + height > y_break) {
2129 b = y_break - dy;
2130 if (dy < sy) { /* Avoid trashing self */
2131 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2132 y_break);
2133 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2134 height - b, width, y_break);
2135 } else {
2136 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2137 height - b, width, y_break);
2138 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2139 y_break);
2140 }
2141 return;
2142 }
2143 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2144 height, width);
2145 }
2146
2147 static void updatescrollmode(struct fbcon_display *p,
2148 struct fb_info *info,
2149 struct vc_data *vc)
2150 {
2151 struct fbcon_ops *ops = info->fbcon_par;
2152 int fh = vc->vc_font.height;
2153 int cap = info->flags;
2154 u16 t = 0;
2155 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2156 info->fix.xpanstep);
2157 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2158 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2159 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2160 info->var.xres_virtual);
2161 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2162 divides(ypan, vc->vc_font.height) && vyres > yres;
2163 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2164 divides(ywrap, vc->vc_font.height) &&
2165 divides(vc->vc_font.height, vyres) &&
2166 divides(vc->vc_font.height, yres);
2167 int reading_fast = cap & FBINFO_READS_FAST;
2168 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2169 !(cap & FBINFO_HWACCEL_DISABLED);
2170 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2171 !(cap & FBINFO_HWACCEL_DISABLED);
2172
2173 p->vrows = vyres/fh;
2174 if (yres > (fh * (vc->vc_rows + 1)))
2175 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2176 if ((yres % fh) && (vyres % fh < yres % fh))
2177 p->vrows--;
2178
2179 if (good_wrap || good_pan) {
2180 if (reading_fast || fast_copyarea)
2181 p->scrollmode = good_wrap ?
2182 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2183 else
2184 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2185 SCROLL_PAN_REDRAW;
2186 } else {
2187 if (reading_fast || (fast_copyarea && !fast_imageblit))
2188 p->scrollmode = SCROLL_MOVE;
2189 else
2190 p->scrollmode = SCROLL_REDRAW;
2191 }
2192 }
2193
2194 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2195 unsigned int height, unsigned int user)
2196 {
2197 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2198 struct fbcon_ops *ops = info->fbcon_par;
2199 struct fbcon_display *p = &fb_display[vc->vc_num];
2200 struct fb_var_screeninfo var = info->var;
2201 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2202
2203 virt_w = FBCON_SWAP(ops->rotate, width, height);
2204 virt_h = FBCON_SWAP(ops->rotate, height, width);
2205 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2206 vc->vc_font.height);
2207 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2208 vc->vc_font.width);
2209 var.xres = virt_w * virt_fw;
2210 var.yres = virt_h * virt_fh;
2211 x_diff = info->var.xres - var.xres;
2212 y_diff = info->var.yres - var.yres;
2213 if (x_diff < 0 || x_diff > virt_fw ||
2214 y_diff < 0 || y_diff > virt_fh) {
2215 const struct fb_videomode *mode;
2216
2217 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2218 mode = fb_find_best_mode(&var, &info->modelist);
2219 if (mode == NULL)
2220 return -EINVAL;
2221 display_to_var(&var, p);
2222 fb_videomode_to_var(&var, mode);
2223
2224 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2225 return -EINVAL;
2226
2227 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2228 if (con_is_visible(vc)) {
2229 var.activate = FB_ACTIVATE_NOW |
2230 FB_ACTIVATE_FORCE;
2231 fb_set_var(info, &var);
2232 }
2233 var_to_display(p, &info->var, info);
2234 ops->var = info->var;
2235 }
2236 updatescrollmode(p, info, vc);
2237 return 0;
2238 }
2239
2240 static int fbcon_switch(struct vc_data *vc)
2241 {
2242 struct fb_info *info, *old_info = NULL;
2243 struct fbcon_ops *ops;
2244 struct fbcon_display *p = &fb_display[vc->vc_num];
2245 struct fb_var_screeninfo var;
2246 int i, ret, prev_console, charcnt = 256;
2247
2248 info = registered_fb[con2fb_map[vc->vc_num]];
2249 ops = info->fbcon_par;
2250
2251 if (softback_top) {
2252 if (softback_lines)
2253 fbcon_set_origin(vc);
2254 softback_top = softback_curr = softback_in = softback_buf;
2255 softback_lines = 0;
2256 fbcon_update_softback(vc);
2257 }
2258
2259 if (logo_shown >= 0) {
2260 struct vc_data *conp2 = vc_cons[logo_shown].d;
2261
2262 if (conp2->vc_top == logo_lines
2263 && conp2->vc_bottom == conp2->vc_rows)
2264 conp2->vc_top = 0;
2265 logo_shown = FBCON_LOGO_CANSHOW;
2266 }
2267
2268 prev_console = ops->currcon;
2269 if (prev_console != -1)
2270 old_info = registered_fb[con2fb_map[prev_console]];
2271 /*
2272 * FIXME: If we have multiple fbdev's loaded, we need to
2273 * update all info->currcon. Perhaps, we can place this
2274 * in a centralized structure, but this might break some
2275 * drivers.
2276 *
2277 * info->currcon = vc->vc_num;
2278 */
2279 for_each_registered_fb(i) {
2280 if (registered_fb[i]->fbcon_par) {
2281 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2282
2283 o->currcon = vc->vc_num;
2284 }
2285 }
2286 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2287 display_to_var(&var, p);
2288 var.activate = FB_ACTIVATE_NOW;
2289
2290 /*
2291 * make sure we don't unnecessarily trip the memcmp()
2292 * in fb_set_var()
2293 */
2294 info->var.activate = var.activate;
2295 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2296 fb_set_var(info, &var);
2297 ops->var = info->var;
2298
2299 if (old_info != NULL && (old_info != info ||
2300 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2301 if (info->fbops->fb_set_par) {
2302 ret = info->fbops->fb_set_par(info);
2303
2304 if (ret)
2305 printk(KERN_ERR "fbcon_switch: detected "
2306 "unhandled fb_set_par error, "
2307 "error code %d\n", ret);
2308 }
2309
2310 if (old_info != info)
2311 fbcon_del_cursor_timer(old_info);
2312 }
2313
2314 if (fbcon_is_inactive(vc, info) ||
2315 ops->blank_state != FB_BLANK_UNBLANK)
2316 fbcon_del_cursor_timer(info);
2317 else
2318 fbcon_add_cursor_timer(info);
2319
2320 set_blitting_type(vc, info);
2321 ops->cursor_reset = 1;
2322
2323 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2324 ops->rotate = FB_ROTATE_UR;
2325 set_blitting_type(vc, info);
2326 }
2327
2328 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2329 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2330
2331 if (p->userfont)
2332 charcnt = FNTCHARCNT(vc->vc_font.data);
2333
2334 if (charcnt > 256)
2335 vc->vc_complement_mask <<= 1;
2336
2337 updatescrollmode(p, info, vc);
2338
2339 switch (p->scrollmode) {
2340 case SCROLL_WRAP_MOVE:
2341 scrollback_phys_max = p->vrows - vc->vc_rows;
2342 break;
2343 case SCROLL_PAN_MOVE:
2344 case SCROLL_PAN_REDRAW:
2345 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2346 if (scrollback_phys_max < 0)
2347 scrollback_phys_max = 0;
2348 break;
2349 default:
2350 scrollback_phys_max = 0;
2351 break;
2352 }
2353
2354 scrollback_max = 0;
2355 scrollback_current = 0;
2356
2357 if (!fbcon_is_inactive(vc, info)) {
2358 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2359 ops->update_start(info);
2360 }
2361
2362 fbcon_set_palette(vc, color_table);
2363 fbcon_clear_margins(vc, 0);
2364
2365 if (logo_shown == FBCON_LOGO_DRAW) {
2366
2367 logo_shown = fg_console;
2368 /* This is protected above by initmem_freed */
2369 fb_show_logo(info, ops->rotate);
2370 update_region(vc,
2371 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2372 vc->vc_size_row * (vc->vc_bottom -
2373 vc->vc_top) / 2);
2374 return 0;
2375 }
2376 return 1;
2377 }
2378
2379 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2380 int blank)
2381 {
2382 if (blank) {
2383 unsigned short charmask = vc->vc_hi_font_mask ?
2384 0x1ff : 0xff;
2385 unsigned short oldc;
2386
2387 oldc = vc->vc_video_erase_char;
2388 vc->vc_video_erase_char &= charmask;
2389 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2390 vc->vc_video_erase_char = oldc;
2391 }
2392 }
2393
2394 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2395 {
2396 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2397 struct fbcon_ops *ops = info->fbcon_par;
2398
2399 if (mode_switch) {
2400 struct fb_var_screeninfo var = info->var;
2401
2402 ops->graphics = 1;
2403
2404 if (!blank) {
2405 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2406 fb_set_var(info, &var);
2407 ops->graphics = 0;
2408 ops->var = info->var;
2409 }
2410 }
2411
2412 if (!fbcon_is_inactive(vc, info)) {
2413 if (ops->blank_state != blank) {
2414 ops->blank_state = blank;
2415 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2416 ops->cursor_flash = (!blank);
2417
2418 if (fb_blank(info, blank))
2419 fbcon_generic_blank(vc, info, blank);
2420 }
2421
2422 if (!blank)
2423 update_screen(vc);
2424 }
2425
2426 if (mode_switch || fbcon_is_inactive(vc, info) ||
2427 ops->blank_state != FB_BLANK_UNBLANK)
2428 fbcon_del_cursor_timer(info);
2429 else
2430 fbcon_add_cursor_timer(info);
2431
2432 return 0;
2433 }
2434
2435 static int fbcon_debug_enter(struct vc_data *vc)
2436 {
2437 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2438 struct fbcon_ops *ops = info->fbcon_par;
2439
2440 ops->save_graphics = ops->graphics;
2441 ops->graphics = 0;
2442 if (info->fbops->fb_debug_enter)
2443 info->fbops->fb_debug_enter(info);
2444 fbcon_set_palette(vc, color_table);
2445 return 0;
2446 }
2447
2448 static int fbcon_debug_leave(struct vc_data *vc)
2449 {
2450 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2451 struct fbcon_ops *ops = info->fbcon_par;
2452
2453 ops->graphics = ops->save_graphics;
2454 if (info->fbops->fb_debug_leave)
2455 info->fbops->fb_debug_leave(info);
2456 return 0;
2457 }
2458
2459 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2460 {
2461 u8 *fontdata = vc->vc_font.data;
2462 u8 *data = font->data;
2463 int i, j;
2464
2465 font->width = vc->vc_font.width;
2466 font->height = vc->vc_font.height;
2467 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2468 if (!font->data)
2469 return 0;
2470
2471 if (font->width <= 8) {
2472 j = vc->vc_font.height;
2473 for (i = 0; i < font->charcount; i++) {
2474 memcpy(data, fontdata, j);
2475 memset(data + j, 0, 32 - j);
2476 data += 32;
2477 fontdata += j;
2478 }
2479 } else if (font->width <= 16) {
2480 j = vc->vc_font.height * 2;
2481 for (i = 0; i < font->charcount; i++) {
2482 memcpy(data, fontdata, j);
2483 memset(data + j, 0, 64 - j);
2484 data += 64;
2485 fontdata += j;
2486 }
2487 } else if (font->width <= 24) {
2488 for (i = 0; i < font->charcount; i++) {
2489 for (j = 0; j < vc->vc_font.height; j++) {
2490 *data++ = fontdata[0];
2491 *data++ = fontdata[1];
2492 *data++ = fontdata[2];
2493 fontdata += sizeof(u32);
2494 }
2495 memset(data, 0, 3 * (32 - j));
2496 data += 3 * (32 - j);
2497 }
2498 } else {
2499 j = vc->vc_font.height * 4;
2500 for (i = 0; i < font->charcount; i++) {
2501 memcpy(data, fontdata, j);
2502 memset(data + j, 0, 128 - j);
2503 data += 128;
2504 fontdata += j;
2505 }
2506 }
2507 return 0;
2508 }
2509
2510 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2511 static void set_vc_hi_font(struct vc_data *vc, bool set)
2512 {
2513 if (!set) {
2514 vc->vc_hi_font_mask = 0;
2515 if (vc->vc_can_do_color) {
2516 vc->vc_complement_mask >>= 1;
2517 vc->vc_s_complement_mask >>= 1;
2518 }
2519
2520 /* ++Edmund: reorder the attribute bits */
2521 if (vc->vc_can_do_color) {
2522 unsigned short *cp =
2523 (unsigned short *) vc->vc_origin;
2524 int count = vc->vc_screenbuf_size / 2;
2525 unsigned short c;
2526 for (; count > 0; count--, cp++) {
2527 c = scr_readw(cp);
2528 scr_writew(((c & 0xfe00) >> 1) |
2529 (c & 0xff), cp);
2530 }
2531 c = vc->vc_video_erase_char;
2532 vc->vc_video_erase_char =
2533 ((c & 0xfe00) >> 1) | (c & 0xff);
2534 vc->vc_attr >>= 1;
2535 }
2536 } else {
2537 vc->vc_hi_font_mask = 0x100;
2538 if (vc->vc_can_do_color) {
2539 vc->vc_complement_mask <<= 1;
2540 vc->vc_s_complement_mask <<= 1;
2541 }
2542
2543 /* ++Edmund: reorder the attribute bits */
2544 {
2545 unsigned short *cp =
2546 (unsigned short *) vc->vc_origin;
2547 int count = vc->vc_screenbuf_size / 2;
2548 unsigned short c;
2549 for (; count > 0; count--, cp++) {
2550 unsigned short newc;
2551 c = scr_readw(cp);
2552 if (vc->vc_can_do_color)
2553 newc =
2554 ((c & 0xff00) << 1) | (c &
2555 0xff);
2556 else
2557 newc = c & ~0x100;
2558 scr_writew(newc, cp);
2559 }
2560 c = vc->vc_video_erase_char;
2561 if (vc->vc_can_do_color) {
2562 vc->vc_video_erase_char =
2563 ((c & 0xff00) << 1) | (c & 0xff);
2564 vc->vc_attr <<= 1;
2565 } else
2566 vc->vc_video_erase_char = c & ~0x100;
2567 }
2568 }
2569 }
2570
2571 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2572 const u8 * data, int userfont)
2573 {
2574 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2575 struct fbcon_ops *ops = info->fbcon_par;
2576 struct fbcon_display *p = &fb_display[vc->vc_num];
2577 int resize;
2578 int cnt;
2579 char *old_data = NULL;
2580
2581 if (con_is_visible(vc) && softback_lines)
2582 fbcon_set_origin(vc);
2583
2584 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2585 if (p->userfont)
2586 old_data = vc->vc_font.data;
2587 if (userfont)
2588 cnt = FNTCHARCNT(data);
2589 else
2590 cnt = 256;
2591 vc->vc_font.data = (void *)(p->fontdata = data);
2592 if ((p->userfont = userfont))
2593 REFCOUNT(data)++;
2594 vc->vc_font.width = w;
2595 vc->vc_font.height = h;
2596 if (vc->vc_hi_font_mask && cnt == 256)
2597 set_vc_hi_font(vc, false);
2598 else if (!vc->vc_hi_font_mask && cnt == 512)
2599 set_vc_hi_font(vc, true);
2600
2601 if (resize) {
2602 int cols, rows;
2603
2604 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2605 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2606 cols /= w;
2607 rows /= h;
2608 vc_resize(vc, cols, rows);
2609 if (con_is_visible(vc) && softback_buf)
2610 fbcon_update_softback(vc);
2611 } else if (con_is_visible(vc)
2612 && vc->vc_mode == KD_TEXT) {
2613 fbcon_clear_margins(vc, 0);
2614 update_screen(vc);
2615 }
2616
2617 if (old_data && (--REFCOUNT(old_data) == 0))
2618 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2619 return 0;
2620 }
2621
2622 static int fbcon_copy_font(struct vc_data *vc, int con)
2623 {
2624 struct fbcon_display *od = &fb_display[con];
2625 struct console_font *f = &vc->vc_font;
2626
2627 if (od->fontdata == f->data)
2628 return 0; /* already the same font... */
2629 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2630 }
2631
2632 /*
2633 * User asked to set font; we are guaranteed that
2634 * a) width and height are in range 1..32
2635 * b) charcount does not exceed 512
2636 * but lets not assume that, since someone might someday want to use larger
2637 * fonts. And charcount of 512 is small for unicode support.
2638 *
2639 * However, user space gives the font in 32 rows , regardless of
2640 * actual font height. So a new API is needed if support for larger fonts
2641 * is ever implemented.
2642 */
2643
2644 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2645 unsigned int flags)
2646 {
2647 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2648 unsigned charcount = font->charcount;
2649 int w = font->width;
2650 int h = font->height;
2651 int size;
2652 int i, csum;
2653 u8 *new_data, *data = font->data;
2654 int pitch = (font->width+7) >> 3;
2655
2656 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2657 * If not this check should be changed to charcount < 256 */
2658 if (charcount != 256 && charcount != 512)
2659 return -EINVAL;
2660
2661 /* Make sure drawing engine can handle the font */
2662 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2663 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2664 return -EINVAL;
2665
2666 /* Make sure driver can handle the font length */
2667 if (fbcon_invalid_charcount(info, charcount))
2668 return -EINVAL;
2669
2670 size = h * pitch * charcount;
2671
2672 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2673
2674 if (!new_data)
2675 return -ENOMEM;
2676
2677 new_data += FONT_EXTRA_WORDS * sizeof(int);
2678 FNTSIZE(new_data) = size;
2679 FNTCHARCNT(new_data) = charcount;
2680 REFCOUNT(new_data) = 0; /* usage counter */
2681 for (i=0; i< charcount; i++) {
2682 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2683 }
2684
2685 /* Since linux has a nice crc32 function use it for counting font
2686 * checksums. */
2687 csum = crc32(0, new_data, size);
2688
2689 FNTSUM(new_data) = csum;
2690 /* Check if the same font is on some other console already */
2691 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2692 struct vc_data *tmp = vc_cons[i].d;
2693
2694 if (fb_display[i].userfont &&
2695 fb_display[i].fontdata &&
2696 FNTSUM(fb_display[i].fontdata) == csum &&
2697 FNTSIZE(fb_display[i].fontdata) == size &&
2698 tmp->vc_font.width == w &&
2699 !memcmp(fb_display[i].fontdata, new_data, size)) {
2700 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2701 new_data = (u8 *)fb_display[i].fontdata;
2702 break;
2703 }
2704 }
2705 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2706 }
2707
2708 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2709 {
2710 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2711 const struct font_desc *f;
2712
2713 if (!name)
2714 f = get_default_font(info->var.xres, info->var.yres,
2715 info->pixmap.blit_x, info->pixmap.blit_y);
2716 else if (!(f = find_font(name)))
2717 return -ENOENT;
2718
2719 font->width = f->width;
2720 font->height = f->height;
2721 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2722 }
2723
2724 static u16 palette_red[16];
2725 static u16 palette_green[16];
2726 static u16 palette_blue[16];
2727
2728 static struct fb_cmap palette_cmap = {
2729 0, 16, palette_red, palette_green, palette_blue, NULL
2730 };
2731
2732 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2733 {
2734 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2735 int i, j, k, depth;
2736 u8 val;
2737
2738 if (fbcon_is_inactive(vc, info))
2739 return;
2740
2741 if (!con_is_visible(vc))
2742 return;
2743
2744 depth = fb_get_color_depth(&info->var, &info->fix);
2745 if (depth > 3) {
2746 for (i = j = 0; i < 16; i++) {
2747 k = table[i];
2748 val = vc->vc_palette[j++];
2749 palette_red[k] = (val << 8) | val;
2750 val = vc->vc_palette[j++];
2751 palette_green[k] = (val << 8) | val;
2752 val = vc->vc_palette[j++];
2753 palette_blue[k] = (val << 8) | val;
2754 }
2755 palette_cmap.len = 16;
2756 palette_cmap.start = 0;
2757 /*
2758 * If framebuffer is capable of less than 16 colors,
2759 * use default palette of fbcon.
2760 */
2761 } else
2762 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2763
2764 fb_set_cmap(&palette_cmap, info);
2765 }
2766
2767 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2768 {
2769 unsigned long p;
2770 int line;
2771
2772 if (vc->vc_num != fg_console || !softback_lines)
2773 return (u16 *) (vc->vc_origin + offset);
2774 line = offset / vc->vc_size_row;
2775 if (line >= softback_lines)
2776 return (u16 *) (vc->vc_origin + offset -
2777 softback_lines * vc->vc_size_row);
2778 p = softback_curr + offset;
2779 if (p >= softback_end)
2780 p += softback_buf - softback_end;
2781 return (u16 *) p;
2782 }
2783
2784 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2785 int *px, int *py)
2786 {
2787 unsigned long ret;
2788 int x, y;
2789
2790 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2791 unsigned long offset = (pos - vc->vc_origin) / 2;
2792
2793 x = offset % vc->vc_cols;
2794 y = offset / vc->vc_cols;
2795 if (vc->vc_num == fg_console)
2796 y += softback_lines;
2797 ret = pos + (vc->vc_cols - x) * 2;
2798 } else if (vc->vc_num == fg_console && softback_lines) {
2799 unsigned long offset = pos - softback_curr;
2800
2801 if (pos < softback_curr)
2802 offset += softback_end - softback_buf;
2803 offset /= 2;
2804 x = offset % vc->vc_cols;
2805 y = offset / vc->vc_cols;
2806 ret = pos + (vc->vc_cols - x) * 2;
2807 if (ret == softback_end)
2808 ret = softback_buf;
2809 if (ret == softback_in)
2810 ret = vc->vc_origin;
2811 } else {
2812 /* Should not happen */
2813 x = y = 0;
2814 ret = vc->vc_origin;
2815 }
2816 if (px)
2817 *px = x;
2818 if (py)
2819 *py = y;
2820 return ret;
2821 }
2822
2823 /* As we might be inside of softback, we may work with non-contiguous buffer,
2824 that's why we have to use a separate routine. */
2825 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2826 {
2827 while (cnt--) {
2828 u16 a = scr_readw(p);
2829 if (!vc->vc_can_do_color)
2830 a ^= 0x0800;
2831 else if (vc->vc_hi_font_mask == 0x100)
2832 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2833 (((a) & 0x0e00) << 4);
2834 else
2835 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2836 (((a) & 0x0700) << 4);
2837 scr_writew(a, p++);
2838 if (p == (u16 *) softback_end)
2839 p = (u16 *) softback_buf;
2840 if (p == (u16 *) softback_in)
2841 p = (u16 *) vc->vc_origin;
2842 }
2843 }
2844
2845 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2846 {
2847 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2848 struct fbcon_ops *ops = info->fbcon_par;
2849 struct fbcon_display *disp = &fb_display[fg_console];
2850 int offset, limit, scrollback_old;
2851
2852 if (softback_top) {
2853 if (vc->vc_num != fg_console)
2854 return;
2855 if (vc->vc_mode != KD_TEXT || !lines)
2856 return;
2857 if (logo_shown >= 0) {
2858 struct vc_data *conp2 = vc_cons[logo_shown].d;
2859
2860 if (conp2->vc_top == logo_lines
2861 && conp2->vc_bottom == conp2->vc_rows)
2862 conp2->vc_top = 0;
2863 if (logo_shown == vc->vc_num) {
2864 unsigned long p, q;
2865 int i;
2866
2867 p = softback_in;
2868 q = vc->vc_origin +
2869 logo_lines * vc->vc_size_row;
2870 for (i = 0; i < logo_lines; i++) {
2871 if (p == softback_top)
2872 break;
2873 if (p == softback_buf)
2874 p = softback_end;
2875 p -= vc->vc_size_row;
2876 q -= vc->vc_size_row;
2877 scr_memcpyw((u16 *) q, (u16 *) p,
2878 vc->vc_size_row);
2879 }
2880 softback_in = softback_curr = p;
2881 update_region(vc, vc->vc_origin,
2882 logo_lines * vc->vc_cols);
2883 }
2884 logo_shown = FBCON_LOGO_CANSHOW;
2885 }
2886 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2887 fbcon_redraw_softback(vc, disp, lines);
2888 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2889 return;
2890 }
2891
2892 if (!scrollback_phys_max)
2893 return;
2894
2895 scrollback_old = scrollback_current;
2896 scrollback_current -= lines;
2897 if (scrollback_current < 0)
2898 scrollback_current = 0;
2899 else if (scrollback_current > scrollback_max)
2900 scrollback_current = scrollback_max;
2901 if (scrollback_current == scrollback_old)
2902 return;
2903
2904 if (fbcon_is_inactive(vc, info))
2905 return;
2906
2907 fbcon_cursor(vc, CM_ERASE);
2908
2909 offset = disp->yscroll - scrollback_current;
2910 limit = disp->vrows;
2911 switch (disp->scrollmode) {
2912 case SCROLL_WRAP_MOVE:
2913 info->var.vmode |= FB_VMODE_YWRAP;
2914 break;
2915 case SCROLL_PAN_MOVE:
2916 case SCROLL_PAN_REDRAW:
2917 limit -= vc->vc_rows;
2918 info->var.vmode &= ~FB_VMODE_YWRAP;
2919 break;
2920 }
2921 if (offset < 0)
2922 offset += limit;
2923 else if (offset >= limit)
2924 offset -= limit;
2925
2926 ops->var.xoffset = 0;
2927 ops->var.yoffset = offset * vc->vc_font.height;
2928 ops->update_start(info);
2929
2930 if (!scrollback_current)
2931 fbcon_cursor(vc, CM_DRAW);
2932 }
2933
2934 static int fbcon_set_origin(struct vc_data *vc)
2935 {
2936 if (softback_lines)
2937 fbcon_scrolldelta(vc, softback_lines);
2938 return 0;
2939 }
2940
2941 void fbcon_suspended(struct fb_info *info)
2942 {
2943 struct vc_data *vc = NULL;
2944 struct fbcon_ops *ops = info->fbcon_par;
2945
2946 if (!ops || ops->currcon < 0)
2947 return;
2948 vc = vc_cons[ops->currcon].d;
2949
2950 /* Clear cursor, restore saved data */
2951 fbcon_cursor(vc, CM_ERASE);
2952 }
2953
2954 void fbcon_resumed(struct fb_info *info)
2955 {
2956 struct vc_data *vc;
2957 struct fbcon_ops *ops = info->fbcon_par;
2958
2959 if (!ops || ops->currcon < 0)
2960 return;
2961 vc = vc_cons[ops->currcon].d;
2962
2963 update_screen(vc);
2964 }
2965
2966 static void fbcon_modechanged(struct fb_info *info)
2967 {
2968 struct fbcon_ops *ops = info->fbcon_par;
2969 struct vc_data *vc;
2970 struct fbcon_display *p;
2971 int rows, cols;
2972
2973 if (!ops || ops->currcon < 0)
2974 return;
2975 vc = vc_cons[ops->currcon].d;
2976 if (vc->vc_mode != KD_TEXT ||
2977 registered_fb[con2fb_map[ops->currcon]] != info)
2978 return;
2979
2980 p = &fb_display[vc->vc_num];
2981 set_blitting_type(vc, info);
2982
2983 if (con_is_visible(vc)) {
2984 var_to_display(p, &info->var, info);
2985 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2986 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2987 cols /= vc->vc_font.width;
2988 rows /= vc->vc_font.height;
2989 vc_resize(vc, cols, rows);
2990 updatescrollmode(p, info, vc);
2991 scrollback_max = 0;
2992 scrollback_current = 0;
2993
2994 if (!fbcon_is_inactive(vc, info)) {
2995 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2996 ops->update_start(info);
2997 }
2998
2999 fbcon_set_palette(vc, color_table);
3000 update_screen(vc);
3001 if (softback_buf)
3002 fbcon_update_softback(vc);
3003 }
3004 }
3005
3006 static void fbcon_set_all_vcs(struct fb_info *info)
3007 {
3008 struct fbcon_ops *ops = info->fbcon_par;
3009 struct vc_data *vc;
3010 struct fbcon_display *p;
3011 int i, rows, cols, fg = -1;
3012
3013 if (!ops || ops->currcon < 0)
3014 return;
3015
3016 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3017 vc = vc_cons[i].d;
3018 if (!vc || vc->vc_mode != KD_TEXT ||
3019 registered_fb[con2fb_map[i]] != info)
3020 continue;
3021
3022 if (con_is_visible(vc)) {
3023 fg = i;
3024 continue;
3025 }
3026
3027 p = &fb_display[vc->vc_num];
3028 set_blitting_type(vc, info);
3029 var_to_display(p, &info->var, info);
3030 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
3031 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
3032 cols /= vc->vc_font.width;
3033 rows /= vc->vc_font.height;
3034 vc_resize(vc, cols, rows);
3035 }
3036
3037 if (fg != -1)
3038 fbcon_modechanged(info);
3039 }
3040
3041
3042 void fbcon_update_vcs(struct fb_info *info, bool all)
3043 {
3044 if (all)
3045 fbcon_set_all_vcs(info);
3046 else
3047 fbcon_modechanged(info);
3048 }
3049 EXPORT_SYMBOL(fbcon_update_vcs);
3050
3051 int fbcon_mode_deleted(struct fb_info *info,
3052 struct fb_videomode *mode)
3053 {
3054 struct fb_info *fb_info;
3055 struct fbcon_display *p;
3056 int i, j, found = 0;
3057
3058 /* before deletion, ensure that mode is not in use */
3059 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3060 j = con2fb_map[i];
3061 if (j == -1)
3062 continue;
3063 fb_info = registered_fb[j];
3064 if (fb_info != info)
3065 continue;
3066 p = &fb_display[i];
3067 if (!p || !p->mode)
3068 continue;
3069 if (fb_mode_is_equal(p->mode, mode)) {
3070 found = 1;
3071 break;
3072 }
3073 }
3074 return found;
3075 }
3076
3077 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3078 static void fbcon_unbind(void)
3079 {
3080 int ret;
3081
3082 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3083 fbcon_is_default);
3084
3085 if (!ret)
3086 fbcon_has_console_bind = 0;
3087 }
3088 #else
3089 static inline void fbcon_unbind(void) {}
3090 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3091
3092 /* called with console_lock held */
3093 void fbcon_fb_unbind(struct fb_info *info)
3094 {
3095 int i, new_idx = -1, ret = 0;
3096 int idx = info->node;
3097
3098 WARN_CONSOLE_UNLOCKED();
3099
3100 if (!fbcon_has_console_bind)
3101 return;
3102
3103 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3104 if (con2fb_map[i] != idx &&
3105 con2fb_map[i] != -1) {
3106 new_idx = con2fb_map[i];
3107 break;
3108 }
3109 }
3110
3111 if (new_idx != -1) {
3112 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3113 if (con2fb_map[i] == idx)
3114 set_con2fb_map(i, new_idx, 0);
3115 }
3116 } else {
3117 struct fb_info *info = registered_fb[idx];
3118
3119 /* This is sort of like set_con2fb_map, except it maps
3120 * the consoles to no device and then releases the
3121 * oldinfo to free memory and cancel the cursor blink
3122 * timer. I can imagine this just becoming part of
3123 * set_con2fb_map where new_idx is -1
3124 */
3125 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3126 if (con2fb_map[i] == idx) {
3127 con2fb_map[i] = -1;
3128 if (!search_fb_in_map(idx)) {
3129 ret = con2fb_release_oldinfo(vc_cons[i].d,
3130 info, NULL, i,
3131 idx, 0);
3132 if (ret) {
3133 con2fb_map[i] = idx;
3134 return;
3135 }
3136 }
3137 }
3138 }
3139 fbcon_unbind();
3140 }
3141 }
3142
3143 /* called with console_lock held */
3144 void fbcon_fb_unregistered(struct fb_info *info)
3145 {
3146 int i, idx;
3147
3148 WARN_CONSOLE_UNLOCKED();
3149
3150 if (deferred_takeover)
3151 return;
3152
3153 idx = info->node;
3154 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3155 if (con2fb_map[i] == idx)
3156 con2fb_map[i] = -1;
3157 }
3158
3159 if (idx == info_idx) {
3160 info_idx = -1;
3161
3162 for_each_registered_fb(i) {
3163 info_idx = i;
3164 break;
3165 }
3166 }
3167
3168 if (info_idx != -1) {
3169 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3170 if (con2fb_map[i] == -1)
3171 con2fb_map[i] = info_idx;
3172 }
3173 }
3174
3175 if (primary_device == idx)
3176 primary_device = -1;
3177
3178 if (!num_registered_fb)
3179 do_unregister_con_driver(&fb_con);
3180 }
3181
3182 void fbcon_remap_all(struct fb_info *info)
3183 {
3184 int i, idx = info->node;
3185
3186 console_lock();
3187 if (deferred_takeover) {
3188 for (i = first_fb_vc; i <= last_fb_vc; i++)
3189 con2fb_map_boot[i] = idx;
3190 fbcon_map_override();
3191 console_unlock();
3192 return;
3193 }
3194
3195 for (i = first_fb_vc; i <= last_fb_vc; i++)
3196 set_con2fb_map(i, idx, 0);
3197
3198 if (con_is_bound(&fb_con)) {
3199 printk(KERN_INFO "fbcon: Remapping primary device, "
3200 "fb%i, to tty %i-%i\n", idx,
3201 first_fb_vc + 1, last_fb_vc + 1);
3202 info_idx = idx;
3203 }
3204 console_unlock();
3205 }
3206
3207 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3208 static void fbcon_select_primary(struct fb_info *info)
3209 {
3210 if (!map_override && primary_device == -1 &&
3211 fb_is_primary_device(info)) {
3212 int i;
3213
3214 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3215 info->fix.id, info->node);
3216 primary_device = info->node;
3217
3218 for (i = first_fb_vc; i <= last_fb_vc; i++)
3219 con2fb_map_boot[i] = primary_device;
3220
3221 if (con_is_bound(&fb_con)) {
3222 printk(KERN_INFO "fbcon: Remapping primary device, "
3223 "fb%i, to tty %i-%i\n", info->node,
3224 first_fb_vc + 1, last_fb_vc + 1);
3225 info_idx = primary_device;
3226 }
3227 }
3228
3229 }
3230 #else
3231 static inline void fbcon_select_primary(struct fb_info *info)
3232 {
3233 return;
3234 }
3235 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3236
3237 /* called with console_lock held */
3238 int fbcon_fb_registered(struct fb_info *info)
3239 {
3240 int ret = 0, i, idx;
3241
3242 WARN_CONSOLE_UNLOCKED();
3243
3244 idx = info->node;
3245 fbcon_select_primary(info);
3246
3247 if (deferred_takeover) {
3248 pr_info("fbcon: Deferring console take-over\n");
3249 return 0;
3250 }
3251
3252 if (info_idx == -1) {
3253 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3254 if (con2fb_map_boot[i] == idx) {
3255 info_idx = idx;
3256 break;
3257 }
3258 }
3259
3260 if (info_idx != -1)
3261 ret = do_fbcon_takeover(1);
3262 } else {
3263 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3264 if (con2fb_map_boot[i] == idx)
3265 set_con2fb_map(i, idx, 0);
3266 }
3267 }
3268
3269 return ret;
3270 }
3271
3272 void fbcon_fb_blanked(struct fb_info *info, int blank)
3273 {
3274 struct fbcon_ops *ops = info->fbcon_par;
3275 struct vc_data *vc;
3276
3277 if (!ops || ops->currcon < 0)
3278 return;
3279
3280 vc = vc_cons[ops->currcon].d;
3281 if (vc->vc_mode != KD_TEXT ||
3282 registered_fb[con2fb_map[ops->currcon]] != info)
3283 return;
3284
3285 if (con_is_visible(vc)) {
3286 if (blank)
3287 do_blank_screen(0);
3288 else
3289 do_unblank_screen(0);
3290 }
3291 ops->blank_state = blank;
3292 }
3293
3294 void fbcon_new_modelist(struct fb_info *info)
3295 {
3296 int i;
3297 struct vc_data *vc;
3298 struct fb_var_screeninfo var;
3299 const struct fb_videomode *mode;
3300
3301 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3302 if (registered_fb[con2fb_map[i]] != info)
3303 continue;
3304 if (!fb_display[i].mode)
3305 continue;
3306 vc = vc_cons[i].d;
3307 display_to_var(&var, &fb_display[i]);
3308 mode = fb_find_nearest_mode(fb_display[i].mode,
3309 &info->modelist);
3310 fb_videomode_to_var(&var, mode);
3311 fbcon_set_disp(info, &var, vc->vc_num);
3312 }
3313 }
3314
3315 void fbcon_get_requirement(struct fb_info *info,
3316 struct fb_blit_caps *caps)
3317 {
3318 struct vc_data *vc;
3319 struct fbcon_display *p;
3320
3321 if (caps->flags) {
3322 int i, charcnt;
3323
3324 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3325 vc = vc_cons[i].d;
3326 if (vc && vc->vc_mode == KD_TEXT &&
3327 info->node == con2fb_map[i]) {
3328 p = &fb_display[i];
3329 caps->x |= 1 << (vc->vc_font.width - 1);
3330 caps->y |= 1 << (vc->vc_font.height - 1);
3331 charcnt = (p->userfont) ?
3332 FNTCHARCNT(p->fontdata) : 256;
3333 if (caps->len < charcnt)
3334 caps->len = charcnt;
3335 }
3336 }
3337 } else {
3338 vc = vc_cons[fg_console].d;
3339
3340 if (vc && vc->vc_mode == KD_TEXT &&
3341 info->node == con2fb_map[fg_console]) {
3342 p = &fb_display[fg_console];
3343 caps->x = 1 << (vc->vc_font.width - 1);
3344 caps->y = 1 << (vc->vc_font.height - 1);
3345 caps->len = (p->userfont) ?
3346 FNTCHARCNT(p->fontdata) : 256;
3347 }
3348 }
3349 }
3350
3351 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3352 {
3353 struct fb_con2fbmap con2fb;
3354 int ret;
3355
3356 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3357 return -EFAULT;
3358 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3359 return -EINVAL;
3360 if (con2fb.framebuffer >= FB_MAX)
3361 return -EINVAL;
3362 if (!registered_fb[con2fb.framebuffer])
3363 request_module("fb%d", con2fb.framebuffer);
3364 if (!registered_fb[con2fb.framebuffer]) {
3365 return -EINVAL;
3366 }
3367
3368 console_lock();
3369 ret = set_con2fb_map(con2fb.console - 1,
3370 con2fb.framebuffer, 1);
3371 console_unlock();
3372
3373 return ret;
3374 }
3375
3376 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3377 {
3378 struct fb_con2fbmap con2fb;
3379
3380 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3381 return -EFAULT;
3382 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3383 return -EINVAL;
3384
3385 console_lock();
3386 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3387 console_unlock();
3388
3389 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3390 }
3391
3392 /*
3393 * The console `switch' structure for the frame buffer based console
3394 */
3395
3396 static const struct consw fb_con = {
3397 .owner = THIS_MODULE,
3398 .con_startup = fbcon_startup,
3399 .con_init = fbcon_init,
3400 .con_deinit = fbcon_deinit,
3401 .con_clear = fbcon_clear,
3402 .con_putc = fbcon_putc,
3403 .con_putcs = fbcon_putcs,
3404 .con_cursor = fbcon_cursor,
3405 .con_scroll = fbcon_scroll,
3406 .con_switch = fbcon_switch,
3407 .con_blank = fbcon_blank,
3408 .con_font_set = fbcon_set_font,
3409 .con_font_get = fbcon_get_font,
3410 .con_font_default = fbcon_set_def_font,
3411 .con_font_copy = fbcon_copy_font,
3412 .con_set_palette = fbcon_set_palette,
3413 .con_scrolldelta = fbcon_scrolldelta,
3414 .con_set_origin = fbcon_set_origin,
3415 .con_invert_region = fbcon_invert_region,
3416 .con_screen_pos = fbcon_screen_pos,
3417 .con_getxy = fbcon_getxy,
3418 .con_resize = fbcon_resize,
3419 .con_debug_enter = fbcon_debug_enter,
3420 .con_debug_leave = fbcon_debug_leave,
3421 };
3422
3423 static ssize_t store_rotate(struct device *device,
3424 struct device_attribute *attr, const char *buf,
3425 size_t count)
3426 {
3427 struct fb_info *info;
3428 int rotate, idx;
3429 char **last = NULL;
3430
3431 console_lock();
3432 idx = con2fb_map[fg_console];
3433
3434 if (idx == -1 || registered_fb[idx] == NULL)
3435 goto err;
3436
3437 info = registered_fb[idx];
3438 rotate = simple_strtoul(buf, last, 0);
3439 fbcon_rotate(info, rotate);
3440 err:
3441 console_unlock();
3442 return count;
3443 }
3444
3445 static ssize_t store_rotate_all(struct device *device,
3446 struct device_attribute *attr,const char *buf,
3447 size_t count)
3448 {
3449 struct fb_info *info;
3450 int rotate, idx;
3451 char **last = NULL;
3452
3453 console_lock();
3454 idx = con2fb_map[fg_console];
3455
3456 if (idx == -1 || registered_fb[idx] == NULL)
3457 goto err;
3458
3459 info = registered_fb[idx];
3460 rotate = simple_strtoul(buf, last, 0);
3461 fbcon_rotate_all(info, rotate);
3462 err:
3463 console_unlock();
3464 return count;
3465 }
3466
3467 static ssize_t show_rotate(struct device *device,
3468 struct device_attribute *attr,char *buf)
3469 {
3470 struct fb_info *info;
3471 int rotate = 0, idx;
3472
3473 console_lock();
3474 idx = con2fb_map[fg_console];
3475
3476 if (idx == -1 || registered_fb[idx] == NULL)
3477 goto err;
3478
3479 info = registered_fb[idx];
3480 rotate = fbcon_get_rotate(info);
3481 err:
3482 console_unlock();
3483 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3484 }
3485
3486 static ssize_t show_cursor_blink(struct device *device,
3487 struct device_attribute *attr, char *buf)
3488 {
3489 struct fb_info *info;
3490 struct fbcon_ops *ops;
3491 int idx, blink = -1;
3492
3493 console_lock();
3494 idx = con2fb_map[fg_console];
3495
3496 if (idx == -1 || registered_fb[idx] == NULL)
3497 goto err;
3498
3499 info = registered_fb[idx];
3500 ops = info->fbcon_par;
3501
3502 if (!ops)
3503 goto err;
3504
3505 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3506 err:
3507 console_unlock();
3508 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3509 }
3510
3511 static ssize_t store_cursor_blink(struct device *device,
3512 struct device_attribute *attr,
3513 const char *buf, size_t count)
3514 {
3515 struct fb_info *info;
3516 int blink, idx;
3517 char **last = NULL;
3518
3519 console_lock();
3520 idx = con2fb_map[fg_console];
3521
3522 if (idx == -1 || registered_fb[idx] == NULL)
3523 goto err;
3524
3525 info = registered_fb[idx];
3526
3527 if (!info->fbcon_par)
3528 goto err;
3529
3530 blink = simple_strtoul(buf, last, 0);
3531
3532 if (blink) {
3533 fbcon_cursor_noblink = 0;
3534 fbcon_add_cursor_timer(info);
3535 } else {
3536 fbcon_cursor_noblink = 1;
3537 fbcon_del_cursor_timer(info);
3538 }
3539
3540 err:
3541 console_unlock();
3542 return count;
3543 }
3544
3545 static struct device_attribute device_attrs[] = {
3546 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3547 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3548 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3549 store_cursor_blink),
3550 };
3551
3552 static int fbcon_init_device(void)
3553 {
3554 int i, error = 0;
3555
3556 fbcon_has_sysfs = 1;
3557
3558 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3559 error = device_create_file(fbcon_device, &device_attrs[i]);
3560
3561 if (error)
3562 break;
3563 }
3564
3565 if (error) {
3566 while (--i >= 0)
3567 device_remove_file(fbcon_device, &device_attrs[i]);
3568
3569 fbcon_has_sysfs = 0;
3570 }
3571
3572 return 0;
3573 }
3574
3575 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3576 static void fbcon_register_existing_fbs(struct work_struct *work)
3577 {
3578 int i;
3579
3580 console_lock();
3581
3582 for_each_registered_fb(i)
3583 fbcon_fb_registered(registered_fb[i]);
3584
3585 console_unlock();
3586 }
3587
3588 static struct notifier_block fbcon_output_nb;
3589 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3590
3591 static int fbcon_output_notifier(struct notifier_block *nb,
3592 unsigned long action, void *data)
3593 {
3594 WARN_CONSOLE_UNLOCKED();
3595
3596 pr_info("fbcon: Taking over console\n");
3597
3598 dummycon_unregister_output_notifier(&fbcon_output_nb);
3599 deferred_takeover = false;
3600 logo_shown = FBCON_LOGO_DONTSHOW;
3601
3602 /* We may get called in atomic context */
3603 schedule_work(&fbcon_deferred_takeover_work);
3604
3605 return NOTIFY_OK;
3606 }
3607 #endif
3608
3609 static void fbcon_start(void)
3610 {
3611 WARN_CONSOLE_UNLOCKED();
3612
3613 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3614 if (conswitchp != &dummy_con)
3615 deferred_takeover = false;
3616
3617 if (deferred_takeover) {
3618 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3619 dummycon_register_output_notifier(&fbcon_output_nb);
3620 return;
3621 }
3622 #endif
3623
3624 if (num_registered_fb) {
3625 int i;
3626
3627 for_each_registered_fb(i) {
3628 info_idx = i;
3629 break;
3630 }
3631
3632 do_fbcon_takeover(0);
3633 }
3634 }
3635
3636 static void fbcon_exit(void)
3637 {
3638 struct fb_info *info;
3639 int i, j, mapped;
3640
3641 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3642 if (deferred_takeover) {
3643 dummycon_unregister_output_notifier(&fbcon_output_nb);
3644 deferred_takeover = false;
3645 }
3646 #endif
3647
3648 kvfree((void *)softback_buf);
3649 softback_buf = 0UL;
3650
3651 for_each_registered_fb(i) {
3652 int pending = 0;
3653
3654 mapped = 0;
3655 info = registered_fb[i];
3656
3657 if (info->queue.func)
3658 pending = cancel_work_sync(&info->queue);
3659 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3660 "no"));
3661
3662 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3663 if (con2fb_map[j] == i) {
3664 mapped = 1;
3665 con2fb_map[j] = -1;
3666 }
3667 }
3668
3669 if (mapped) {
3670 if (info->fbops->fb_release)
3671 info->fbops->fb_release(info, 0);
3672 module_put(info->fbops->owner);
3673
3674 if (info->fbcon_par) {
3675 struct fbcon_ops *ops = info->fbcon_par;
3676
3677 fbcon_del_cursor_timer(info);
3678 kfree(ops->cursor_src);
3679 kfree(ops->cursor_state.mask);
3680 kfree(info->fbcon_par);
3681 info->fbcon_par = NULL;
3682 }
3683
3684 if (info->queue.func == fb_flashcursor)
3685 info->queue.func = NULL;
3686 }
3687 }
3688 }
3689
3690 void __init fb_console_init(void)
3691 {
3692 int i;
3693
3694 console_lock();
3695 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3696 "fbcon");
3697
3698 if (IS_ERR(fbcon_device)) {
3699 printk(KERN_WARNING "Unable to create device "
3700 "for fbcon; errno = %ld\n",
3701 PTR_ERR(fbcon_device));
3702 fbcon_device = NULL;
3703 } else
3704 fbcon_init_device();
3705
3706 for (i = 0; i < MAX_NR_CONSOLES; i++)
3707 con2fb_map[i] = -1;
3708
3709 fbcon_start();
3710 console_unlock();
3711 }
3712
3713 #ifdef MODULE
3714
3715 static void __exit fbcon_deinit_device(void)
3716 {
3717 int i;
3718
3719 if (fbcon_has_sysfs) {
3720 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3721 device_remove_file(fbcon_device, &device_attrs[i]);
3722
3723 fbcon_has_sysfs = 0;
3724 }
3725 }
3726
3727 void __exit fb_console_exit(void)
3728 {
3729 console_lock();
3730 fbcon_deinit_device();
3731 device_destroy(fb_class, MKDEV(0, 0));
3732 fbcon_exit();
3733 do_unregister_con_driver(&fb_con);
3734 console_unlock();
3735 }
3736 #endif
Linux with added FPC-III support