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Linux 4.16.11
[linux/fpc-iii.git] / drivers / video / fbdev / core / fbcon.c
blob5baf7bc054e12cc183e8b8844bcfc3da942c757d
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 <asm/fb.h>
80 #include <asm/irq.h>
81
82 #include "fbcon.h"
83
84 #ifdef FBCONDEBUG
85 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
86 #else
87 # define DPRINTK(fmt, args...)
88 #endif
89
90 enum {
91 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
92 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
93 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
94 };
95
96 static struct display fb_display[MAX_NR_CONSOLES];
97
98 static signed char con2fb_map[MAX_NR_CONSOLES];
99 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
100
101 static int logo_lines;
102 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
103 enums. */
104 static int logo_shown = FBCON_LOGO_CANSHOW;
105 /* Software scrollback */
106 static int fbcon_softback_size = 32768;
107 static unsigned long softback_buf, softback_curr;
108 static unsigned long softback_in;
109 static unsigned long softback_top, softback_end;
110 static int softback_lines;
111 /* console mappings */
112 static int first_fb_vc;
113 static int last_fb_vc = MAX_NR_CONSOLES - 1;
114 static int fbcon_is_default = 1;
115 static int fbcon_has_exited;
116 static int primary_device = -1;
117 static int fbcon_has_console_bind;
118
119 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
120 static int map_override;
121
122 static inline void fbcon_map_override(void)
123 {
124 map_override = 1;
125 }
126 #else
127 static inline void fbcon_map_override(void)
128 {
129 }
130 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
131
132 /* font data */
133 static char fontname[40];
134
135 /* current fb_info */
136 static int info_idx = -1;
137
138 /* console rotation */
139 static int initial_rotation = -1;
140 static int fbcon_has_sysfs;
141 static int margin_color;
142
143 static const struct consw fb_con;
144
145 #define CM_SOFTBACK (8)
146
147 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
148
149 static int fbcon_set_origin(struct vc_data *);
150
151 static int fbcon_cursor_noblink;
152
153 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
154
155 /*
156 * Interface used by the world
157 */
158
159 static const char *fbcon_startup(void);
160 static void fbcon_init(struct vc_data *vc, int init);
161 static void fbcon_deinit(struct vc_data *vc);
162 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
163 int width);
164 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
165 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
166 int count, int ypos, int xpos);
167 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
168 static void fbcon_cursor(struct vc_data *vc, int mode);
169 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171 static int fbcon_switch(struct vc_data *vc);
172 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
174
175 /*
176 * Internal routines
177 */
178 static __inline__ void ywrap_up(struct vc_data *vc, int count);
179 static __inline__ void ywrap_down(struct vc_data *vc, int count);
180 static __inline__ void ypan_up(struct vc_data *vc, int count);
181 static __inline__ void ypan_down(struct vc_data *vc, int count);
182 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
183 int dy, int dx, int height, int width, u_int y_break);
184 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
185 int unit);
186 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
187 int line, int count, int dy);
188 static void fbcon_modechanged(struct fb_info *info);
189 static void fbcon_set_all_vcs(struct fb_info *info);
190 static void fbcon_start(void);
191 static void fbcon_exit(void);
192 static struct device *fbcon_device;
193
194 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
195 static inline void fbcon_set_rotation(struct fb_info *info)
196 {
197 struct fbcon_ops *ops = info->fbcon_par;
198
199 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
200 ops->p->con_rotate < 4)
201 ops->rotate = ops->p->con_rotate;
202 else
203 ops->rotate = 0;
204 }
205
206 static void fbcon_rotate(struct fb_info *info, u32 rotate)
207 {
208 struct fbcon_ops *ops= info->fbcon_par;
209 struct fb_info *fb_info;
210
211 if (!ops || ops->currcon == -1)
212 return;
213
214 fb_info = registered_fb[con2fb_map[ops->currcon]];
215
216 if (info == fb_info) {
217 struct display *p = &fb_display[ops->currcon];
218
219 if (rotate < 4)
220 p->con_rotate = rotate;
221 else
222 p->con_rotate = 0;
223
224 fbcon_modechanged(info);
225 }
226 }
227
228 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
229 {
230 struct fbcon_ops *ops = info->fbcon_par;
231 struct vc_data *vc;
232 struct display *p;
233 int i;
234
235 if (!ops || ops->currcon < 0 || rotate > 3)
236 return;
237
238 for (i = first_fb_vc; i <= last_fb_vc; i++) {
239 vc = vc_cons[i].d;
240 if (!vc || vc->vc_mode != KD_TEXT ||
241 registered_fb[con2fb_map[i]] != info)
242 continue;
243
244 p = &fb_display[vc->vc_num];
245 p->con_rotate = rotate;
246 }
247
248 fbcon_set_all_vcs(info);
249 }
250 #else
251 static inline void fbcon_set_rotation(struct fb_info *info)
252 {
253 struct fbcon_ops *ops = info->fbcon_par;
254
255 ops->rotate = FB_ROTATE_UR;
256 }
257
258 static void fbcon_rotate(struct fb_info *info, u32 rotate)
259 {
260 return;
261 }
262
263 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
264 {
265 return;
266 }
267 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
268
269 static int fbcon_get_rotate(struct fb_info *info)
270 {
271 struct fbcon_ops *ops = info->fbcon_par;
272
273 return (ops) ? ops->rotate : 0;
274 }
275
276 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
277 {
278 struct fbcon_ops *ops = info->fbcon_par;
279
280 return (info->state != FBINFO_STATE_RUNNING ||
281 vc->vc_mode != KD_TEXT || ops->graphics) &&
282 !vt_force_oops_output(vc);
283 }
284
285 static int get_color(struct vc_data *vc, struct fb_info *info,
286 u16 c, int is_fg)
287 {
288 int depth = fb_get_color_depth(&info->var, &info->fix);
289 int color = 0;
290
291 if (console_blanked) {
292 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
293
294 c = vc->vc_video_erase_char & charmask;
295 }
296
297 if (depth != 1)
298 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
299 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
300
301 switch (depth) {
302 case 1:
303 {
304 int col = mono_col(info);
305 /* 0 or 1 */
306 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
307 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
308
309 if (console_blanked)
310 fg = bg;
311
312 color = (is_fg) ? fg : bg;
313 break;
314 }
315 case 2:
316 /*
317 * Scale down 16-colors to 4 colors. Default 4-color palette
318 * is grayscale. However, simply dividing the values by 4
319 * will not work, as colors 1, 2 and 3 will be scaled-down
320 * to zero rendering them invisible. So empirically convert
321 * colors to a sane 4-level grayscale.
322 */
323 switch (color) {
324 case 0:
325 color = 0; /* black */
326 break;
327 case 1 ... 6:
328 color = 2; /* white */
329 break;
330 case 7 ... 8:
331 color = 1; /* gray */
332 break;
333 default:
334 color = 3; /* intense white */
335 break;
336 }
337 break;
338 case 3:
339 /*
340 * Last 8 entries of default 16-color palette is a more intense
341 * version of the first 8 (i.e., same chrominance, different
342 * luminance).
343 */
344 color &= 7;
345 break;
346 }
347
348
349 return color;
350 }
351
352 static void fbcon_update_softback(struct vc_data *vc)
353 {
354 int l = fbcon_softback_size / vc->vc_size_row;
355
356 if (l > 5)
357 softback_end = softback_buf + l * vc->vc_size_row;
358 else
359 /* Smaller scrollback makes no sense, and 0 would screw
360 the operation totally */
361 softback_top = 0;
362 }
363
364 static void fb_flashcursor(struct work_struct *work)
365 {
366 struct fb_info *info = container_of(work, struct fb_info, queue);
367 struct fbcon_ops *ops = info->fbcon_par;
368 struct vc_data *vc = NULL;
369 int c;
370 int mode;
371 int ret;
372
373 /* FIXME: we should sort out the unbind locking instead */
374 /* instead we just fail to flash the cursor if we can't get
375 * the lock instead of blocking fbcon deinit */
376 ret = console_trylock();
377 if (ret == 0)
378 return;
379
380 if (ops && ops->currcon != -1)
381 vc = vc_cons[ops->currcon].d;
382
383 if (!vc || !con_is_visible(vc) ||
384 registered_fb[con2fb_map[vc->vc_num]] != info ||
385 vc->vc_deccm != 1) {
386 console_unlock();
387 return;
388 }
389
390 c = scr_readw((u16 *) vc->vc_pos);
391 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
392 CM_ERASE : CM_DRAW;
393 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
394 get_color(vc, info, c, 0));
395 console_unlock();
396 }
397
398 static void cursor_timer_handler(struct timer_list *t)
399 {
400 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
401 struct fb_info *info = ops->info;
402
403 queue_work(system_power_efficient_wq, &info->queue);
404 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
405 }
406
407 static void fbcon_add_cursor_timer(struct fb_info *info)
408 {
409 struct fbcon_ops *ops = info->fbcon_par;
410
411 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
412 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
413 !fbcon_cursor_noblink) {
414 if (!info->queue.func)
415 INIT_WORK(&info->queue, fb_flashcursor);
416
417 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
418 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
419 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
420 }
421 }
422
423 static void fbcon_del_cursor_timer(struct fb_info *info)
424 {
425 struct fbcon_ops *ops = info->fbcon_par;
426
427 if (info->queue.func == fb_flashcursor &&
428 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
429 del_timer_sync(&ops->cursor_timer);
430 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
431 }
432 }
433
434 #ifndef MODULE
435 static int __init fb_console_setup(char *this_opt)
436 {
437 char *options;
438 int i, j;
439
440 if (!this_opt || !*this_opt)
441 return 1;
442
443 while ((options = strsep(&this_opt, ",")) != NULL) {
444 if (!strncmp(options, "font:", 5)) {
445 strlcpy(fontname, options + 5, sizeof(fontname));
446 continue;
447 }
448
449 if (!strncmp(options, "scrollback:", 11)) {
450 options += 11;
451 if (*options) {
452 fbcon_softback_size = simple_strtoul(options, &options, 0);
453 if (*options == 'k' || *options == 'K') {
454 fbcon_softback_size *= 1024;
455 }
456 }
457 continue;
458 }
459
460 if (!strncmp(options, "map:", 4)) {
461 options += 4;
462 if (*options) {
463 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
464 if (!options[j])
465 j = 0;
466 con2fb_map_boot[i] =
467 (options[j++]-'0') % FB_MAX;
468 }
469
470 fbcon_map_override();
471 }
472 continue;
473 }
474
475 if (!strncmp(options, "vc:", 3)) {
476 options += 3;
477 if (*options)
478 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
479 if (first_fb_vc < 0)
480 first_fb_vc = 0;
481 if (*options++ == '-')
482 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 fbcon_is_default = 0;
484 continue;
485 }
486
487 if (!strncmp(options, "rotate:", 7)) {
488 options += 7;
489 if (*options)
490 initial_rotation = simple_strtoul(options, &options, 0);
491 if (initial_rotation > 3)
492 initial_rotation = 0;
493 continue;
494 }
495
496 if (!strncmp(options, "margin:", 7)) {
497 options += 7;
498 if (*options)
499 margin_color = simple_strtoul(options, &options, 0);
500 continue;
501 }
502 }
503 return 1;
504 }
505
506 __setup("fbcon=", fb_console_setup);
507 #endif
508
509 static int search_fb_in_map(int idx)
510 {
511 int i, retval = 0;
512
513 for (i = first_fb_vc; i <= last_fb_vc; i++) {
514 if (con2fb_map[i] == idx)
515 retval = 1;
516 }
517 return retval;
518 }
519
520 static int search_for_mapped_con(void)
521 {
522 int i, retval = 0;
523
524 for (i = first_fb_vc; i <= last_fb_vc; i++) {
525 if (con2fb_map[i] != -1)
526 retval = 1;
527 }
528 return retval;
529 }
530
531 static int do_fbcon_takeover(int show_logo)
532 {
533 int err, i;
534
535 if (!num_registered_fb)
536 return -ENODEV;
537
538 if (!show_logo)
539 logo_shown = FBCON_LOGO_DONTSHOW;
540
541 for (i = first_fb_vc; i <= last_fb_vc; i++)
542 con2fb_map[i] = info_idx;
543
544 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
545 fbcon_is_default);
546
547 if (err) {
548 for (i = first_fb_vc; i <= last_fb_vc; i++)
549 con2fb_map[i] = -1;
550 info_idx = -1;
551 } else {
552 fbcon_has_console_bind = 1;
553 }
554
555 return err;
556 }
557
558 #ifdef MODULE
559 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
560 int cols, int rows, int new_cols, int new_rows)
561 {
562 logo_shown = FBCON_LOGO_DONTSHOW;
563 }
564 #else
565 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
566 int cols, int rows, int new_cols, int new_rows)
567 {
568 /* Need to make room for the logo */
569 struct fbcon_ops *ops = info->fbcon_par;
570 int cnt, erase = vc->vc_video_erase_char, step;
571 unsigned short *save = NULL, *r, *q;
572 int logo_height;
573
574 if (info->fbops->owner) {
575 logo_shown = FBCON_LOGO_DONTSHOW;
576 return;
577 }
578
579 /*
580 * remove underline attribute from erase character
581 * if black and white framebuffer.
582 */
583 if (fb_get_color_depth(&info->var, &info->fix) == 1)
584 erase &= ~0x400;
585 logo_height = fb_prepare_logo(info, ops->rotate);
586 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
587 q = (unsigned short *) (vc->vc_origin +
588 vc->vc_size_row * rows);
589 step = logo_lines * cols;
590 for (r = q - logo_lines * cols; r < q; r++)
591 if (scr_readw(r) != vc->vc_video_erase_char)
592 break;
593 if (r != q && new_rows >= rows + logo_lines) {
594 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
595 if (save) {
596 int i = cols < new_cols ? cols : new_cols;
597 scr_memsetw(save, erase, logo_lines * new_cols * 2);
598 r = q - step;
599 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
600 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
601 r = q;
602 }
603 }
604 if (r == q) {
605 /* We can scroll screen down */
606 r = q - step - cols;
607 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
608 scr_memcpyw(r + step, r, vc->vc_size_row);
609 r -= cols;
610 }
611 if (!save) {
612 int lines;
613 if (vc->vc_y + logo_lines >= rows)
614 lines = rows - vc->vc_y - 1;
615 else
616 lines = logo_lines;
617 vc->vc_y += lines;
618 vc->vc_pos += lines * vc->vc_size_row;
619 }
620 }
621 scr_memsetw((unsigned short *) vc->vc_origin,
622 erase,
623 vc->vc_size_row * logo_lines);
624
625 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
626 fbcon_clear_margins(vc, 0);
627 update_screen(vc);
628 }
629
630 if (save) {
631 q = (unsigned short *) (vc->vc_origin +
632 vc->vc_size_row *
633 rows);
634 scr_memcpyw(q, save, logo_lines * new_cols * 2);
635 vc->vc_y += logo_lines;
636 vc->vc_pos += logo_lines * vc->vc_size_row;
637 kfree(save);
638 }
639
640 if (logo_lines > vc->vc_bottom) {
641 logo_shown = FBCON_LOGO_CANSHOW;
642 printk(KERN_INFO
643 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
644 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
645 logo_shown = FBCON_LOGO_DRAW;
646 vc->vc_top = logo_lines;
647 }
648 }
649 #endif /* MODULE */
650
651 #ifdef CONFIG_FB_TILEBLITTING
652 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
653 {
654 struct fbcon_ops *ops = info->fbcon_par;
655
656 ops->p = &fb_display[vc->vc_num];
657
658 if ((info->flags & FBINFO_MISC_TILEBLITTING))
659 fbcon_set_tileops(vc, info);
660 else {
661 fbcon_set_rotation(info);
662 fbcon_set_bitops(ops);
663 }
664 }
665
666 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
667 {
668 int err = 0;
669
670 if (info->flags & FBINFO_MISC_TILEBLITTING &&
671 info->tileops->fb_get_tilemax(info) < charcount)
672 err = 1;
673
674 return err;
675 }
676 #else
677 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
678 {
679 struct fbcon_ops *ops = info->fbcon_par;
680
681 info->flags &= ~FBINFO_MISC_TILEBLITTING;
682 ops->p = &fb_display[vc->vc_num];
683 fbcon_set_rotation(info);
684 fbcon_set_bitops(ops);
685 }
686
687 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
688 {
689 return 0;
690 }
691
692 #endif /* CONFIG_MISC_TILEBLITTING */
693
694
695 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
696 int unit, int oldidx)
697 {
698 struct fbcon_ops *ops = NULL;
699 int err = 0;
700
701 if (!try_module_get(info->fbops->owner))
702 err = -ENODEV;
703
704 if (!err && info->fbops->fb_open &&
705 info->fbops->fb_open(info, 0))
706 err = -ENODEV;
707
708 if (!err) {
709 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
710 if (!ops)
711 err = -ENOMEM;
712 }
713
714 if (!err) {
715 ops->cur_blink_jiffies = HZ / 5;
716 ops->info = info;
717 info->fbcon_par = ops;
718
719 if (vc)
720 set_blitting_type(vc, info);
721 }
722
723 if (err) {
724 con2fb_map[unit] = oldidx;
725 module_put(info->fbops->owner);
726 }
727
728 return err;
729 }
730
731 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
732 struct fb_info *newinfo, int unit,
733 int oldidx, int found)
734 {
735 struct fbcon_ops *ops = oldinfo->fbcon_par;
736 int err = 0, ret;
737
738 if (oldinfo->fbops->fb_release &&
739 oldinfo->fbops->fb_release(oldinfo, 0)) {
740 con2fb_map[unit] = oldidx;
741 if (!found && newinfo->fbops->fb_release)
742 newinfo->fbops->fb_release(newinfo, 0);
743 if (!found)
744 module_put(newinfo->fbops->owner);
745 err = -ENODEV;
746 }
747
748 if (!err) {
749 fbcon_del_cursor_timer(oldinfo);
750 kfree(ops->cursor_state.mask);
751 kfree(ops->cursor_data);
752 kfree(ops->cursor_src);
753 kfree(ops->fontbuffer);
754 kfree(oldinfo->fbcon_par);
755 oldinfo->fbcon_par = NULL;
756 module_put(oldinfo->fbops->owner);
757 /*
758 If oldinfo and newinfo are driving the same hardware,
759 the fb_release() method of oldinfo may attempt to
760 restore the hardware state. This will leave the
761 newinfo in an undefined state. Thus, a call to
762 fb_set_par() may be needed for the newinfo.
763 */
764 if (newinfo && newinfo->fbops->fb_set_par) {
765 ret = newinfo->fbops->fb_set_par(newinfo);
766
767 if (ret)
768 printk(KERN_ERR "con2fb_release_oldinfo: "
769 "detected unhandled fb_set_par error, "
770 "error code %d\n", ret);
771 }
772 }
773
774 return err;
775 }
776
777 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
778 int unit, int show_logo)
779 {
780 struct fbcon_ops *ops = info->fbcon_par;
781 int ret;
782
783 ops->currcon = fg_console;
784
785 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
786 ret = info->fbops->fb_set_par(info);
787
788 if (ret)
789 printk(KERN_ERR "con2fb_init_display: detected "
790 "unhandled fb_set_par error, "
791 "error code %d\n", ret);
792 }
793
794 ops->flags |= FBCON_FLAGS_INIT;
795 ops->graphics = 0;
796 fbcon_set_disp(info, &info->var, unit);
797
798 if (show_logo) {
799 struct vc_data *fg_vc = vc_cons[fg_console].d;
800 struct fb_info *fg_info =
801 registered_fb[con2fb_map[fg_console]];
802
803 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
804 fg_vc->vc_rows, fg_vc->vc_cols,
805 fg_vc->vc_rows);
806 }
807
808 update_screen(vc_cons[fg_console].d);
809 }
810
811 /**
812 * set_con2fb_map - map console to frame buffer device
813 * @unit: virtual console number to map
814 * @newidx: frame buffer index to map virtual console to
815 * @user: user request
816 *
817 * Maps a virtual console @unit to a frame buffer device
818 * @newidx.
819 *
820 * This should be called with the console lock held.
821 */
822 static int set_con2fb_map(int unit, int newidx, int user)
823 {
824 struct vc_data *vc = vc_cons[unit].d;
825 int oldidx = con2fb_map[unit];
826 struct fb_info *info = registered_fb[newidx];
827 struct fb_info *oldinfo = NULL;
828 int found, err = 0;
829
830 if (oldidx == newidx)
831 return 0;
832
833 if (!info)
834 return -EINVAL;
835
836 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
837 info_idx = newidx;
838 return do_fbcon_takeover(0);
839 }
840
841 if (oldidx != -1)
842 oldinfo = registered_fb[oldidx];
843
844 found = search_fb_in_map(newidx);
845
846 con2fb_map[unit] = newidx;
847 if (!err && !found)
848 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
849
850
851 /*
852 * If old fb is not mapped to any of the consoles,
853 * fbcon should release it.
854 */
855 if (!err && oldinfo && !search_fb_in_map(oldidx))
856 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
857 found);
858
859 if (!err) {
860 int show_logo = (fg_console == 0 && !user &&
861 logo_shown != FBCON_LOGO_DONTSHOW);
862
863 if (!found)
864 fbcon_add_cursor_timer(info);
865 con2fb_map_boot[unit] = newidx;
866 con2fb_init_display(vc, info, unit, show_logo);
867 }
868
869 if (!search_fb_in_map(info_idx))
870 info_idx = newidx;
871
872 return err;
873 }
874
875 /*
876 * Low Level Operations
877 */
878 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
879 static int var_to_display(struct display *disp,
880 struct fb_var_screeninfo *var,
881 struct fb_info *info)
882 {
883 disp->xres_virtual = var->xres_virtual;
884 disp->yres_virtual = var->yres_virtual;
885 disp->bits_per_pixel = var->bits_per_pixel;
886 disp->grayscale = var->grayscale;
887 disp->nonstd = var->nonstd;
888 disp->accel_flags = var->accel_flags;
889 disp->height = var->height;
890 disp->width = var->width;
891 disp->red = var->red;
892 disp->green = var->green;
893 disp->blue = var->blue;
894 disp->transp = var->transp;
895 disp->rotate = var->rotate;
896 disp->mode = fb_match_mode(var, &info->modelist);
897 if (disp->mode == NULL)
898 /* This should not happen */
899 return -EINVAL;
900 return 0;
901 }
902
903 static void display_to_var(struct fb_var_screeninfo *var,
904 struct display *disp)
905 {
906 fb_videomode_to_var(var, disp->mode);
907 var->xres_virtual = disp->xres_virtual;
908 var->yres_virtual = disp->yres_virtual;
909 var->bits_per_pixel = disp->bits_per_pixel;
910 var->grayscale = disp->grayscale;
911 var->nonstd = disp->nonstd;
912 var->accel_flags = disp->accel_flags;
913 var->height = disp->height;
914 var->width = disp->width;
915 var->red = disp->red;
916 var->green = disp->green;
917 var->blue = disp->blue;
918 var->transp = disp->transp;
919 var->rotate = disp->rotate;
920 }
921
922 static const char *fbcon_startup(void)
923 {
924 const char *display_desc = "frame buffer device";
925 struct display *p = &fb_display[fg_console];
926 struct vc_data *vc = vc_cons[fg_console].d;
927 const struct font_desc *font = NULL;
928 struct module *owner;
929 struct fb_info *info = NULL;
930 struct fbcon_ops *ops;
931 int rows, cols;
932
933 /*
934 * If num_registered_fb is zero, this is a call for the dummy part.
935 * The frame buffer devices weren't initialized yet.
936 */
937 if (!num_registered_fb || info_idx == -1)
938 return display_desc;
939 /*
940 * Instead of blindly using registered_fb[0], we use info_idx, set by
941 * fb_console_init();
942 */
943 info = registered_fb[info_idx];
944 if (!info)
945 return NULL;
946
947 owner = info->fbops->owner;
948 if (!try_module_get(owner))
949 return NULL;
950 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
951 module_put(owner);
952 return NULL;
953 }
954
955 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
956 if (!ops) {
957 module_put(owner);
958 return NULL;
959 }
960
961 ops->currcon = -1;
962 ops->graphics = 1;
963 ops->cur_rotate = -1;
964 ops->cur_blink_jiffies = HZ / 5;
965 ops->info = info;
966 info->fbcon_par = ops;
967
968 p->con_rotate = initial_rotation;
969 if (p->con_rotate == -1)
970 p->con_rotate = info->fbcon_rotate_hint;
971 if (p->con_rotate == -1)
972 p->con_rotate = FB_ROTATE_UR;
973
974 set_blitting_type(vc, info);
975
976 if (info->fix.type != FB_TYPE_TEXT) {
977 if (fbcon_softback_size) {
978 if (!softback_buf) {
979 softback_buf =
980 (unsigned long)
981 kmalloc(fbcon_softback_size,
982 GFP_KERNEL);
983 if (!softback_buf) {
984 fbcon_softback_size = 0;
985 softback_top = 0;
986 }
987 }
988 } else {
989 if (softback_buf) {
990 kfree((void *) softback_buf);
991 softback_buf = 0;
992 softback_top = 0;
993 }
994 }
995 if (softback_buf)
996 softback_in = softback_top = softback_curr =
997 softback_buf;
998 softback_lines = 0;
999 }
1000
1001 /* Setup default font */
1002 if (!p->fontdata && !vc->vc_font.data) {
1003 if (!fontname[0] || !(font = find_font(fontname)))
1004 font = get_default_font(info->var.xres,
1005 info->var.yres,
1006 info->pixmap.blit_x,
1007 info->pixmap.blit_y);
1008 vc->vc_font.width = font->width;
1009 vc->vc_font.height = font->height;
1010 vc->vc_font.data = (void *)(p->fontdata = font->data);
1011 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1012 } else {
1013 p->fontdata = vc->vc_font.data;
1014 }
1015
1016 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1017 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1018 cols /= vc->vc_font.width;
1019 rows /= vc->vc_font.height;
1020 vc_resize(vc, cols, rows);
1021
1022 DPRINTK("mode: %s\n", info->fix.id);
1023 DPRINTK("visual: %d\n", info->fix.visual);
1024 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1025 info->var.yres,
1026 info->var.bits_per_pixel);
1027
1028 fbcon_add_cursor_timer(info);
1029 fbcon_has_exited = 0;
1030 return display_desc;
1031 }
1032
1033 static void fbcon_init(struct vc_data *vc, int init)
1034 {
1035 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1036 struct fbcon_ops *ops;
1037 struct vc_data **default_mode = vc->vc_display_fg;
1038 struct vc_data *svc = *default_mode;
1039 struct display *t, *p = &fb_display[vc->vc_num];
1040 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1041 int cap, ret;
1042
1043 if (info_idx == -1 || info == NULL)
1044 return;
1045
1046 cap = info->flags;
1047
1048 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1049 (info->fix.type == FB_TYPE_TEXT))
1050 logo = 0;
1051
1052 if (var_to_display(p, &info->var, info))
1053 return;
1054
1055 if (!info->fbcon_par)
1056 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1057
1058 /* If we are not the first console on this
1059 fb, copy the font from that console */
1060 t = &fb_display[fg_console];
1061 if (!p->fontdata) {
1062 if (t->fontdata) {
1063 struct vc_data *fvc = vc_cons[fg_console].d;
1064
1065 vc->vc_font.data = (void *)(p->fontdata =
1066 fvc->vc_font.data);
1067 vc->vc_font.width = fvc->vc_font.width;
1068 vc->vc_font.height = fvc->vc_font.height;
1069 p->userfont = t->userfont;
1070
1071 if (p->userfont)
1072 REFCOUNT(p->fontdata)++;
1073 } else {
1074 const struct font_desc *font = NULL;
1075
1076 if (!fontname[0] || !(font = find_font(fontname)))
1077 font = get_default_font(info->var.xres,
1078 info->var.yres,
1079 info->pixmap.blit_x,
1080 info->pixmap.blit_y);
1081 vc->vc_font.width = font->width;
1082 vc->vc_font.height = font->height;
1083 vc->vc_font.data = (void *)(p->fontdata = font->data);
1084 vc->vc_font.charcount = 256; /* FIXME Need to
1085 support more fonts */
1086 }
1087 }
1088
1089 if (p->userfont)
1090 charcnt = FNTCHARCNT(p->fontdata);
1091
1092 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1093 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1094 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1095 if (charcnt == 256) {
1096 vc->vc_hi_font_mask = 0;
1097 } else {
1098 vc->vc_hi_font_mask = 0x100;
1099 if (vc->vc_can_do_color)
1100 vc->vc_complement_mask <<= 1;
1101 }
1102
1103 if (!*svc->vc_uni_pagedir_loc)
1104 con_set_default_unimap(svc);
1105 if (!*vc->vc_uni_pagedir_loc)
1106 con_copy_unimap(vc, svc);
1107
1108 ops = info->fbcon_par;
1109 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1110
1111 p->con_rotate = initial_rotation;
1112 if (p->con_rotate == -1)
1113 p->con_rotate = info->fbcon_rotate_hint;
1114 if (p->con_rotate == -1)
1115 p->con_rotate = FB_ROTATE_UR;
1116
1117 set_blitting_type(vc, info);
1118
1119 cols = vc->vc_cols;
1120 rows = vc->vc_rows;
1121 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1122 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1123 new_cols /= vc->vc_font.width;
1124 new_rows /= vc->vc_font.height;
1125
1126 /*
1127 * We must always set the mode. The mode of the previous console
1128 * driver could be in the same resolution but we are using different
1129 * hardware so we have to initialize the hardware.
1130 *
1131 * We need to do it in fbcon_init() to prevent screen corruption.
1132 */
1133 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1134 if (info->fbops->fb_set_par &&
1135 !(ops->flags & FBCON_FLAGS_INIT)) {
1136 ret = info->fbops->fb_set_par(info);
1137
1138 if (ret)
1139 printk(KERN_ERR "fbcon_init: detected "
1140 "unhandled fb_set_par error, "
1141 "error code %d\n", ret);
1142 }
1143
1144 ops->flags |= FBCON_FLAGS_INIT;
1145 }
1146
1147 ops->graphics = 0;
1148
1149 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1150 !(cap & FBINFO_HWACCEL_DISABLED))
1151 p->scrollmode = SCROLL_MOVE;
1152 else /* default to something safe */
1153 p->scrollmode = SCROLL_REDRAW;
1154
1155 /*
1156 * ++guenther: console.c:vc_allocate() relies on initializing
1157 * vc_{cols,rows}, but we must not set those if we are only
1158 * resizing the console.
1159 */
1160 if (init) {
1161 vc->vc_cols = new_cols;
1162 vc->vc_rows = new_rows;
1163 } else
1164 vc_resize(vc, new_cols, new_rows);
1165
1166 if (logo)
1167 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1168
1169 if (vc == svc && softback_buf)
1170 fbcon_update_softback(vc);
1171
1172 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1173 ops->rotate = FB_ROTATE_UR;
1174 set_blitting_type(vc, info);
1175 }
1176
1177 ops->p = &fb_display[fg_console];
1178 }
1179
1180 static void fbcon_free_font(struct display *p, bool freefont)
1181 {
1182 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1183 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1184 p->fontdata = NULL;
1185 p->userfont = 0;
1186 }
1187
1188 static void set_vc_hi_font(struct vc_data *vc, bool set);
1189
1190 static void fbcon_deinit(struct vc_data *vc)
1191 {
1192 struct display *p = &fb_display[vc->vc_num];
1193 struct fb_info *info;
1194 struct fbcon_ops *ops;
1195 int idx;
1196 bool free_font = true;
1197
1198 idx = con2fb_map[vc->vc_num];
1199
1200 if (idx == -1)
1201 goto finished;
1202
1203 info = registered_fb[idx];
1204
1205 if (!info)
1206 goto finished;
1207
1208 if (info->flags & FBINFO_MISC_FIRMWARE)
1209 free_font = false;
1210 ops = info->fbcon_par;
1211
1212 if (!ops)
1213 goto finished;
1214
1215 if (con_is_visible(vc))
1216 fbcon_del_cursor_timer(info);
1217
1218 ops->flags &= ~FBCON_FLAGS_INIT;
1219 finished:
1220
1221 fbcon_free_font(p, free_font);
1222 if (free_font)
1223 vc->vc_font.data = NULL;
1224
1225 if (vc->vc_hi_font_mask)
1226 set_vc_hi_font(vc, false);
1227
1228 if (!con_is_bound(&fb_con))
1229 fbcon_exit();
1230
1231 return;
1232 }
1233
1234 /* ====================================================================== */
1235
1236 /* fbcon_XXX routines - interface used by the world
1237 *
1238 * This system is now divided into two levels because of complications
1239 * caused by hardware scrolling. Top level functions:
1240 *
1241 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1242 *
1243 * handles y values in range [0, scr_height-1] that correspond to real
1244 * screen positions. y_wrap shift means that first line of bitmap may be
1245 * anywhere on this display. These functions convert lineoffsets to
1246 * bitmap offsets and deal with the wrap-around case by splitting blits.
1247 *
1248 * fbcon_bmove_physical_8() -- These functions fast implementations
1249 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1250 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1251 *
1252 * WARNING:
1253 *
1254 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1255 * Implies should only really hardware scroll in rows. Only reason for
1256 * restriction is simplicity & efficiency at the moment.
1257 */
1258
1259 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1260 int width)
1261 {
1262 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1263 struct fbcon_ops *ops = info->fbcon_par;
1264
1265 struct display *p = &fb_display[vc->vc_num];
1266 u_int y_break;
1267
1268 if (fbcon_is_inactive(vc, info))
1269 return;
1270
1271 if (!height || !width)
1272 return;
1273
1274 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1275 vc->vc_top = 0;
1276 /*
1277 * If the font dimensions are not an integral of the display
1278 * dimensions then the ops->clear below won't end up clearing
1279 * the margins. Call clear_margins here in case the logo
1280 * bitmap stretched into the margin area.
1281 */
1282 fbcon_clear_margins(vc, 0);
1283 }
1284
1285 /* Split blits that cross physical y_wrap boundary */
1286
1287 y_break = p->vrows - p->yscroll;
1288 if (sy < y_break && sy + height - 1 >= y_break) {
1289 u_int b = y_break - sy;
1290 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1291 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1292 width);
1293 } else
1294 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1295 }
1296
1297 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1298 int count, int ypos, int xpos)
1299 {
1300 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1301 struct display *p = &fb_display[vc->vc_num];
1302 struct fbcon_ops *ops = info->fbcon_par;
1303
1304 if (!fbcon_is_inactive(vc, info))
1305 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1306 get_color(vc, info, scr_readw(s), 1),
1307 get_color(vc, info, scr_readw(s), 0));
1308 }
1309
1310 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1311 {
1312 unsigned short chr;
1313
1314 scr_writew(c, &chr);
1315 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1316 }
1317
1318 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1319 {
1320 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1321 struct fbcon_ops *ops = info->fbcon_par;
1322
1323 if (!fbcon_is_inactive(vc, info))
1324 ops->clear_margins(vc, info, margin_color, bottom_only);
1325 }
1326
1327 static void fbcon_cursor(struct vc_data *vc, int mode)
1328 {
1329 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1330 struct fbcon_ops *ops = info->fbcon_par;
1331 int y;
1332 int c = scr_readw((u16 *) vc->vc_pos);
1333
1334 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1335
1336 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1337 return;
1338
1339 if (vc->vc_cursor_type & 0x10)
1340 fbcon_del_cursor_timer(info);
1341 else
1342 fbcon_add_cursor_timer(info);
1343
1344 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1345 if (mode & CM_SOFTBACK) {
1346 mode &= ~CM_SOFTBACK;
1347 y = softback_lines;
1348 } else {
1349 if (softback_lines)
1350 fbcon_set_origin(vc);
1351 y = 0;
1352 }
1353
1354 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1355 get_color(vc, info, c, 0));
1356 }
1357
1358 static int scrollback_phys_max = 0;
1359 static int scrollback_max = 0;
1360 static int scrollback_current = 0;
1361
1362 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1363 int unit)
1364 {
1365 struct display *p, *t;
1366 struct vc_data **default_mode, *vc;
1367 struct vc_data *svc;
1368 struct fbcon_ops *ops = info->fbcon_par;
1369 int rows, cols, charcnt = 256;
1370
1371 p = &fb_display[unit];
1372
1373 if (var_to_display(p, var, info))
1374 return;
1375
1376 vc = vc_cons[unit].d;
1377
1378 if (!vc)
1379 return;
1380
1381 default_mode = vc->vc_display_fg;
1382 svc = *default_mode;
1383 t = &fb_display[svc->vc_num];
1384
1385 if (!vc->vc_font.data) {
1386 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1387 vc->vc_font.width = (*default_mode)->vc_font.width;
1388 vc->vc_font.height = (*default_mode)->vc_font.height;
1389 p->userfont = t->userfont;
1390 if (p->userfont)
1391 REFCOUNT(p->fontdata)++;
1392 }
1393 if (p->userfont)
1394 charcnt = FNTCHARCNT(p->fontdata);
1395
1396 var->activate = FB_ACTIVATE_NOW;
1397 info->var.activate = var->activate;
1398 var->yoffset = info->var.yoffset;
1399 var->xoffset = info->var.xoffset;
1400 fb_set_var(info, var);
1401 ops->var = info->var;
1402 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1403 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1404 if (charcnt == 256) {
1405 vc->vc_hi_font_mask = 0;
1406 } else {
1407 vc->vc_hi_font_mask = 0x100;
1408 if (vc->vc_can_do_color)
1409 vc->vc_complement_mask <<= 1;
1410 }
1411
1412 if (!*svc->vc_uni_pagedir_loc)
1413 con_set_default_unimap(svc);
1414 if (!*vc->vc_uni_pagedir_loc)
1415 con_copy_unimap(vc, svc);
1416
1417 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1418 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1419 cols /= vc->vc_font.width;
1420 rows /= vc->vc_font.height;
1421 vc_resize(vc, cols, rows);
1422
1423 if (con_is_visible(vc)) {
1424 update_screen(vc);
1425 if (softback_buf)
1426 fbcon_update_softback(vc);
1427 }
1428 }
1429
1430 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1431 {
1432 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1433 struct fbcon_ops *ops = info->fbcon_par;
1434 struct display *p = &fb_display[vc->vc_num];
1435
1436 p->yscroll += count;
1437 if (p->yscroll >= p->vrows) /* Deal with wrap */
1438 p->yscroll -= p->vrows;
1439 ops->var.xoffset = 0;
1440 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1441 ops->var.vmode |= FB_VMODE_YWRAP;
1442 ops->update_start(info);
1443 scrollback_max += count;
1444 if (scrollback_max > scrollback_phys_max)
1445 scrollback_max = scrollback_phys_max;
1446 scrollback_current = 0;
1447 }
1448
1449 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1450 {
1451 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1452 struct fbcon_ops *ops = info->fbcon_par;
1453 struct display *p = &fb_display[vc->vc_num];
1454
1455 p->yscroll -= count;
1456 if (p->yscroll < 0) /* Deal with wrap */
1457 p->yscroll += p->vrows;
1458 ops->var.xoffset = 0;
1459 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1460 ops->var.vmode |= FB_VMODE_YWRAP;
1461 ops->update_start(info);
1462 scrollback_max -= count;
1463 if (scrollback_max < 0)
1464 scrollback_max = 0;
1465 scrollback_current = 0;
1466 }
1467
1468 static __inline__ void ypan_up(struct vc_data *vc, int count)
1469 {
1470 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1471 struct display *p = &fb_display[vc->vc_num];
1472 struct fbcon_ops *ops = info->fbcon_par;
1473
1474 p->yscroll += count;
1475 if (p->yscroll > p->vrows - vc->vc_rows) {
1476 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1477 0, 0, 0, vc->vc_rows, vc->vc_cols);
1478 p->yscroll -= p->vrows - vc->vc_rows;
1479 }
1480
1481 ops->var.xoffset = 0;
1482 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1483 ops->var.vmode &= ~FB_VMODE_YWRAP;
1484 ops->update_start(info);
1485 fbcon_clear_margins(vc, 1);
1486 scrollback_max += count;
1487 if (scrollback_max > scrollback_phys_max)
1488 scrollback_max = scrollback_phys_max;
1489 scrollback_current = 0;
1490 }
1491
1492 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1493 {
1494 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1495 struct fbcon_ops *ops = info->fbcon_par;
1496 struct display *p = &fb_display[vc->vc_num];
1497
1498 p->yscroll += count;
1499
1500 if (p->yscroll > p->vrows - vc->vc_rows) {
1501 p->yscroll -= p->vrows - vc->vc_rows;
1502 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1503 }
1504
1505 ops->var.xoffset = 0;
1506 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1507 ops->var.vmode &= ~FB_VMODE_YWRAP;
1508 ops->update_start(info);
1509 fbcon_clear_margins(vc, 1);
1510 scrollback_max += count;
1511 if (scrollback_max > scrollback_phys_max)
1512 scrollback_max = scrollback_phys_max;
1513 scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_down(struct vc_data *vc, int count)
1517 {
1518 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519 struct display *p = &fb_display[vc->vc_num];
1520 struct fbcon_ops *ops = info->fbcon_par;
1521
1522 p->yscroll -= count;
1523 if (p->yscroll < 0) {
1524 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1525 0, vc->vc_rows, vc->vc_cols);
1526 p->yscroll += p->vrows - vc->vc_rows;
1527 }
1528
1529 ops->var.xoffset = 0;
1530 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531 ops->var.vmode &= ~FB_VMODE_YWRAP;
1532 ops->update_start(info);
1533 fbcon_clear_margins(vc, 1);
1534 scrollback_max -= count;
1535 if (scrollback_max < 0)
1536 scrollback_max = 0;
1537 scrollback_current = 0;
1538 }
1539
1540 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1541 {
1542 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1543 struct fbcon_ops *ops = info->fbcon_par;
1544 struct display *p = &fb_display[vc->vc_num];
1545
1546 p->yscroll -= count;
1547
1548 if (p->yscroll < 0) {
1549 p->yscroll += p->vrows - vc->vc_rows;
1550 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1551 }
1552
1553 ops->var.xoffset = 0;
1554 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1555 ops->var.vmode &= ~FB_VMODE_YWRAP;
1556 ops->update_start(info);
1557 fbcon_clear_margins(vc, 1);
1558 scrollback_max -= count;
1559 if (scrollback_max < 0)
1560 scrollback_max = 0;
1561 scrollback_current = 0;
1562 }
1563
1564 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1565 long delta)
1566 {
1567 int count = vc->vc_rows;
1568 unsigned short *d, *s;
1569 unsigned long n;
1570 int line = 0;
1571
1572 d = (u16 *) softback_curr;
1573 if (d == (u16 *) softback_in)
1574 d = (u16 *) vc->vc_origin;
1575 n = softback_curr + delta * vc->vc_size_row;
1576 softback_lines -= delta;
1577 if (delta < 0) {
1578 if (softback_curr < softback_top && n < softback_buf) {
1579 n += softback_end - softback_buf;
1580 if (n < softback_top) {
1581 softback_lines -=
1582 (softback_top - n) / vc->vc_size_row;
1583 n = softback_top;
1584 }
1585 } else if (softback_curr >= softback_top
1586 && n < softback_top) {
1587 softback_lines -=
1588 (softback_top - n) / vc->vc_size_row;
1589 n = softback_top;
1590 }
1591 } else {
1592 if (softback_curr > softback_in && n >= softback_end) {
1593 n += softback_buf - softback_end;
1594 if (n > softback_in) {
1595 n = softback_in;
1596 softback_lines = 0;
1597 }
1598 } else if (softback_curr <= softback_in && n > softback_in) {
1599 n = softback_in;
1600 softback_lines = 0;
1601 }
1602 }
1603 if (n == softback_curr)
1604 return;
1605 softback_curr = n;
1606 s = (u16 *) softback_curr;
1607 if (s == (u16 *) softback_in)
1608 s = (u16 *) vc->vc_origin;
1609 while (count--) {
1610 unsigned short *start;
1611 unsigned short *le;
1612 unsigned short c;
1613 int x = 0;
1614 unsigned short attr = 1;
1615
1616 start = s;
1617 le = advance_row(s, 1);
1618 do {
1619 c = scr_readw(s);
1620 if (attr != (c & 0xff00)) {
1621 attr = c & 0xff00;
1622 if (s > start) {
1623 fbcon_putcs(vc, start, s - start,
1624 line, x);
1625 x += s - start;
1626 start = s;
1627 }
1628 }
1629 if (c == scr_readw(d)) {
1630 if (s > start) {
1631 fbcon_putcs(vc, start, s - start,
1632 line, x);
1633 x += s - start + 1;
1634 start = s + 1;
1635 } else {
1636 x++;
1637 start++;
1638 }
1639 }
1640 s++;
1641 d++;
1642 } while (s < le);
1643 if (s > start)
1644 fbcon_putcs(vc, start, s - start, line, x);
1645 line++;
1646 if (d == (u16 *) softback_end)
1647 d = (u16 *) softback_buf;
1648 if (d == (u16 *) softback_in)
1649 d = (u16 *) vc->vc_origin;
1650 if (s == (u16 *) softback_end)
1651 s = (u16 *) softback_buf;
1652 if (s == (u16 *) softback_in)
1653 s = (u16 *) vc->vc_origin;
1654 }
1655 }
1656
1657 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1658 int line, int count, int dy)
1659 {
1660 unsigned short *s = (unsigned short *)
1661 (vc->vc_origin + vc->vc_size_row * line);
1662
1663 while (count--) {
1664 unsigned short *start = s;
1665 unsigned short *le = advance_row(s, 1);
1666 unsigned short c;
1667 int x = 0;
1668 unsigned short attr = 1;
1669
1670 do {
1671 c = scr_readw(s);
1672 if (attr != (c & 0xff00)) {
1673 attr = c & 0xff00;
1674 if (s > start) {
1675 fbcon_putcs(vc, start, s - start,
1676 dy, x);
1677 x += s - start;
1678 start = s;
1679 }
1680 }
1681 console_conditional_schedule();
1682 s++;
1683 } while (s < le);
1684 if (s > start)
1685 fbcon_putcs(vc, start, s - start, dy, x);
1686 console_conditional_schedule();
1687 dy++;
1688 }
1689 }
1690
1691 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1692 struct display *p, int line, int count, int ycount)
1693 {
1694 int offset = ycount * vc->vc_cols;
1695 unsigned short *d = (unsigned short *)
1696 (vc->vc_origin + vc->vc_size_row * line);
1697 unsigned short *s = d + offset;
1698 struct fbcon_ops *ops = info->fbcon_par;
1699
1700 while (count--) {
1701 unsigned short *start = s;
1702 unsigned short *le = advance_row(s, 1);
1703 unsigned short c;
1704 int x = 0;
1705
1706 do {
1707 c = scr_readw(s);
1708
1709 if (c == scr_readw(d)) {
1710 if (s > start) {
1711 ops->bmove(vc, info, line + ycount, x,
1712 line, x, 1, s-start);
1713 x += s - start + 1;
1714 start = s + 1;
1715 } else {
1716 x++;
1717 start++;
1718 }
1719 }
1720
1721 scr_writew(c, d);
1722 console_conditional_schedule();
1723 s++;
1724 d++;
1725 } while (s < le);
1726 if (s > start)
1727 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1728 s-start);
1729 console_conditional_schedule();
1730 if (ycount > 0)
1731 line++;
1732 else {
1733 line--;
1734 /* NOTE: We subtract two lines from these pointers */
1735 s -= vc->vc_size_row;
1736 d -= vc->vc_size_row;
1737 }
1738 }
1739 }
1740
1741 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1742 int line, int count, int offset)
1743 {
1744 unsigned short *d = (unsigned short *)
1745 (vc->vc_origin + vc->vc_size_row * line);
1746 unsigned short *s = d + offset;
1747
1748 while (count--) {
1749 unsigned short *start = s;
1750 unsigned short *le = advance_row(s, 1);
1751 unsigned short c;
1752 int x = 0;
1753 unsigned short attr = 1;
1754
1755 do {
1756 c = scr_readw(s);
1757 if (attr != (c & 0xff00)) {
1758 attr = c & 0xff00;
1759 if (s > start) {
1760 fbcon_putcs(vc, start, s - start,
1761 line, x);
1762 x += s - start;
1763 start = s;
1764 }
1765 }
1766 if (c == scr_readw(d)) {
1767 if (s > start) {
1768 fbcon_putcs(vc, start, s - start,
1769 line, x);
1770 x += s - start + 1;
1771 start = s + 1;
1772 } else {
1773 x++;
1774 start++;
1775 }
1776 }
1777 scr_writew(c, d);
1778 console_conditional_schedule();
1779 s++;
1780 d++;
1781 } while (s < le);
1782 if (s > start)
1783 fbcon_putcs(vc, start, s - start, line, x);
1784 console_conditional_schedule();
1785 if (offset > 0)
1786 line++;
1787 else {
1788 line--;
1789 /* NOTE: We subtract two lines from these pointers */
1790 s -= vc->vc_size_row;
1791 d -= vc->vc_size_row;
1792 }
1793 }
1794 }
1795
1796 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1797 int count)
1798 {
1799 unsigned short *p;
1800
1801 if (vc->vc_num != fg_console)
1802 return;
1803 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1804
1805 while (count) {
1806 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1807 count--;
1808 p = advance_row(p, 1);
1809 softback_in += vc->vc_size_row;
1810 if (softback_in == softback_end)
1811 softback_in = softback_buf;
1812 if (softback_in == softback_top) {
1813 softback_top += vc->vc_size_row;
1814 if (softback_top == softback_end)
1815 softback_top = softback_buf;
1816 }
1817 }
1818 softback_curr = softback_in;
1819 }
1820
1821 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1822 enum con_scroll dir, unsigned int count)
1823 {
1824 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1825 struct display *p = &fb_display[vc->vc_num];
1826 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1827
1828 if (fbcon_is_inactive(vc, info))
1829 return true;
1830
1831 fbcon_cursor(vc, CM_ERASE);
1832
1833 /*
1834 * ++Geert: Only use ywrap/ypan if the console is in text mode
1835 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1836 * whole screen (prevents flicker).
1837 */
1838
1839 switch (dir) {
1840 case SM_UP:
1841 if (count > vc->vc_rows) /* Maximum realistic size */
1842 count = vc->vc_rows;
1843 if (softback_top)
1844 fbcon_softback_note(vc, t, count);
1845 if (logo_shown >= 0)
1846 goto redraw_up;
1847 switch (p->scrollmode) {
1848 case SCROLL_MOVE:
1849 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1850 count);
1851 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1852 scr_memsetw((unsigned short *) (vc->vc_origin +
1853 vc->vc_size_row *
1854 (b - count)),
1855 vc->vc_video_erase_char,
1856 vc->vc_size_row * count);
1857 return true;
1858 break;
1859
1860 case SCROLL_WRAP_MOVE:
1861 if (b - t - count > 3 * vc->vc_rows >> 2) {
1862 if (t > 0)
1863 fbcon_bmove(vc, 0, 0, count, 0, t,
1864 vc->vc_cols);
1865 ywrap_up(vc, count);
1866 if (vc->vc_rows - b > 0)
1867 fbcon_bmove(vc, b - count, 0, b, 0,
1868 vc->vc_rows - b,
1869 vc->vc_cols);
1870 } else if (info->flags & FBINFO_READS_FAST)
1871 fbcon_bmove(vc, t + count, 0, t, 0,
1872 b - t - count, vc->vc_cols);
1873 else
1874 goto redraw_up;
1875 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1876 break;
1877
1878 case SCROLL_PAN_REDRAW:
1879 if ((p->yscroll + count <=
1880 2 * (p->vrows - vc->vc_rows))
1881 && ((!scroll_partial && (b - t == vc->vc_rows))
1882 || (scroll_partial
1883 && (b - t - count >
1884 3 * vc->vc_rows >> 2)))) {
1885 if (t > 0)
1886 fbcon_redraw_move(vc, p, 0, t, count);
1887 ypan_up_redraw(vc, t, count);
1888 if (vc->vc_rows - b > 0)
1889 fbcon_redraw_move(vc, p, b,
1890 vc->vc_rows - b, b);
1891 } else
1892 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1893 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1894 break;
1895
1896 case SCROLL_PAN_MOVE:
1897 if ((p->yscroll + count <=
1898 2 * (p->vrows - vc->vc_rows))
1899 && ((!scroll_partial && (b - t == vc->vc_rows))
1900 || (scroll_partial
1901 && (b - t - count >
1902 3 * vc->vc_rows >> 2)))) {
1903 if (t > 0)
1904 fbcon_bmove(vc, 0, 0, count, 0, t,
1905 vc->vc_cols);
1906 ypan_up(vc, count);
1907 if (vc->vc_rows - b > 0)
1908 fbcon_bmove(vc, b - count, 0, b, 0,
1909 vc->vc_rows - b,
1910 vc->vc_cols);
1911 } else if (info->flags & FBINFO_READS_FAST)
1912 fbcon_bmove(vc, t + count, 0, t, 0,
1913 b - t - count, vc->vc_cols);
1914 else
1915 goto redraw_up;
1916 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1917 break;
1918
1919 case SCROLL_REDRAW:
1920 redraw_up:
1921 fbcon_redraw(vc, p, t, b - t - count,
1922 count * vc->vc_cols);
1923 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1924 scr_memsetw((unsigned short *) (vc->vc_origin +
1925 vc->vc_size_row *
1926 (b - count)),
1927 vc->vc_video_erase_char,
1928 vc->vc_size_row * count);
1929 return true;
1930 }
1931 break;
1932
1933 case SM_DOWN:
1934 if (count > vc->vc_rows) /* Maximum realistic size */
1935 count = vc->vc_rows;
1936 if (logo_shown >= 0)
1937 goto redraw_down;
1938 switch (p->scrollmode) {
1939 case SCROLL_MOVE:
1940 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1941 -count);
1942 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1943 scr_memsetw((unsigned short *) (vc->vc_origin +
1944 vc->vc_size_row *
1945 t),
1946 vc->vc_video_erase_char,
1947 vc->vc_size_row * count);
1948 return true;
1949 break;
1950
1951 case SCROLL_WRAP_MOVE:
1952 if (b - t - count > 3 * vc->vc_rows >> 2) {
1953 if (vc->vc_rows - b > 0)
1954 fbcon_bmove(vc, b, 0, b - count, 0,
1955 vc->vc_rows - b,
1956 vc->vc_cols);
1957 ywrap_down(vc, count);
1958 if (t > 0)
1959 fbcon_bmove(vc, count, 0, 0, 0, t,
1960 vc->vc_cols);
1961 } else if (info->flags & FBINFO_READS_FAST)
1962 fbcon_bmove(vc, t, 0, t + count, 0,
1963 b - t - count, vc->vc_cols);
1964 else
1965 goto redraw_down;
1966 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1967 break;
1968
1969 case SCROLL_PAN_MOVE:
1970 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1971 && ((!scroll_partial && (b - t == vc->vc_rows))
1972 || (scroll_partial
1973 && (b - t - count >
1974 3 * vc->vc_rows >> 2)))) {
1975 if (vc->vc_rows - b > 0)
1976 fbcon_bmove(vc, b, 0, b - count, 0,
1977 vc->vc_rows - b,
1978 vc->vc_cols);
1979 ypan_down(vc, count);
1980 if (t > 0)
1981 fbcon_bmove(vc, count, 0, 0, 0, t,
1982 vc->vc_cols);
1983 } else if (info->flags & FBINFO_READS_FAST)
1984 fbcon_bmove(vc, t, 0, t + count, 0,
1985 b - t - count, vc->vc_cols);
1986 else
1987 goto redraw_down;
1988 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1989 break;
1990
1991 case SCROLL_PAN_REDRAW:
1992 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1993 && ((!scroll_partial && (b - t == vc->vc_rows))
1994 || (scroll_partial
1995 && (b - t - count >
1996 3 * vc->vc_rows >> 2)))) {
1997 if (vc->vc_rows - b > 0)
1998 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1999 b - count);
2000 ypan_down_redraw(vc, t, count);
2001 if (t > 0)
2002 fbcon_redraw_move(vc, p, count, t, 0);
2003 } else
2004 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2005 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2006 break;
2007
2008 case SCROLL_REDRAW:
2009 redraw_down:
2010 fbcon_redraw(vc, p, b - 1, b - t - count,
2011 -count * vc->vc_cols);
2012 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2013 scr_memsetw((unsigned short *) (vc->vc_origin +
2014 vc->vc_size_row *
2015 t),
2016 vc->vc_video_erase_char,
2017 vc->vc_size_row * count);
2018 return true;
2019 }
2020 }
2021 return false;
2022 }
2023
2024
2025 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2026 int height, int width)
2027 {
2028 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2029 struct display *p = &fb_display[vc->vc_num];
2030
2031 if (fbcon_is_inactive(vc, info))
2032 return;
2033
2034 if (!width || !height)
2035 return;
2036
2037 /* Split blits that cross physical y_wrap case.
2038 * Pathological case involves 4 blits, better to use recursive
2039 * code rather than unrolled case
2040 *
2041 * Recursive invocations don't need to erase the cursor over and
2042 * over again, so we use fbcon_bmove_rec()
2043 */
2044 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2045 p->vrows - p->yscroll);
2046 }
2047
2048 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2049 int dy, int dx, int height, int width, u_int y_break)
2050 {
2051 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2052 struct fbcon_ops *ops = info->fbcon_par;
2053 u_int b;
2054
2055 if (sy < y_break && sy + height > y_break) {
2056 b = y_break - sy;
2057 if (dy < sy) { /* Avoid trashing self */
2058 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2059 y_break);
2060 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2061 height - b, width, y_break);
2062 } else {
2063 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2064 height - b, width, y_break);
2065 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2066 y_break);
2067 }
2068 return;
2069 }
2070
2071 if (dy < y_break && dy + height > y_break) {
2072 b = y_break - dy;
2073 if (dy < sy) { /* Avoid trashing self */
2074 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2075 y_break);
2076 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2077 height - b, width, y_break);
2078 } else {
2079 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2080 height - b, width, y_break);
2081 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2082 y_break);
2083 }
2084 return;
2085 }
2086 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2087 height, width);
2088 }
2089
2090 static void updatescrollmode(struct display *p,
2091 struct fb_info *info,
2092 struct vc_data *vc)
2093 {
2094 struct fbcon_ops *ops = info->fbcon_par;
2095 int fh = vc->vc_font.height;
2096 int cap = info->flags;
2097 u16 t = 0;
2098 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2099 info->fix.xpanstep);
2100 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2101 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2102 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2103 info->var.xres_virtual);
2104 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2105 divides(ypan, vc->vc_font.height) && vyres > yres;
2106 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2107 divides(ywrap, vc->vc_font.height) &&
2108 divides(vc->vc_font.height, vyres) &&
2109 divides(vc->vc_font.height, yres);
2110 int reading_fast = cap & FBINFO_READS_FAST;
2111 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2112 !(cap & FBINFO_HWACCEL_DISABLED);
2113 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2114 !(cap & FBINFO_HWACCEL_DISABLED);
2115
2116 p->vrows = vyres/fh;
2117 if (yres > (fh * (vc->vc_rows + 1)))
2118 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2119 if ((yres % fh) && (vyres % fh < yres % fh))
2120 p->vrows--;
2121
2122 if (good_wrap || good_pan) {
2123 if (reading_fast || fast_copyarea)
2124 p->scrollmode = good_wrap ?
2125 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2126 else
2127 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2128 SCROLL_PAN_REDRAW;
2129 } else {
2130 if (reading_fast || (fast_copyarea && !fast_imageblit))
2131 p->scrollmode = SCROLL_MOVE;
2132 else
2133 p->scrollmode = SCROLL_REDRAW;
2134 }
2135 }
2136
2137 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2138 unsigned int height, unsigned int user)
2139 {
2140 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2141 struct fbcon_ops *ops = info->fbcon_par;
2142 struct display *p = &fb_display[vc->vc_num];
2143 struct fb_var_screeninfo var = info->var;
2144 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2145
2146 virt_w = FBCON_SWAP(ops->rotate, width, height);
2147 virt_h = FBCON_SWAP(ops->rotate, height, width);
2148 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2149 vc->vc_font.height);
2150 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2151 vc->vc_font.width);
2152 var.xres = virt_w * virt_fw;
2153 var.yres = virt_h * virt_fh;
2154 x_diff = info->var.xres - var.xres;
2155 y_diff = info->var.yres - var.yres;
2156 if (x_diff < 0 || x_diff > virt_fw ||
2157 y_diff < 0 || y_diff > virt_fh) {
2158 const struct fb_videomode *mode;
2159
2160 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2161 mode = fb_find_best_mode(&var, &info->modelist);
2162 if (mode == NULL)
2163 return -EINVAL;
2164 display_to_var(&var, p);
2165 fb_videomode_to_var(&var, mode);
2166
2167 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2168 return -EINVAL;
2169
2170 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2171 if (con_is_visible(vc)) {
2172 var.activate = FB_ACTIVATE_NOW |
2173 FB_ACTIVATE_FORCE;
2174 fb_set_var(info, &var);
2175 }
2176 var_to_display(p, &info->var, info);
2177 ops->var = info->var;
2178 }
2179 updatescrollmode(p, info, vc);
2180 return 0;
2181 }
2182
2183 static int fbcon_switch(struct vc_data *vc)
2184 {
2185 struct fb_info *info, *old_info = NULL;
2186 struct fbcon_ops *ops;
2187 struct display *p = &fb_display[vc->vc_num];
2188 struct fb_var_screeninfo var;
2189 int i, ret, prev_console, charcnt = 256;
2190
2191 info = registered_fb[con2fb_map[vc->vc_num]];
2192 ops = info->fbcon_par;
2193
2194 if (softback_top) {
2195 if (softback_lines)
2196 fbcon_set_origin(vc);
2197 softback_top = softback_curr = softback_in = softback_buf;
2198 softback_lines = 0;
2199 fbcon_update_softback(vc);
2200 }
2201
2202 if (logo_shown >= 0) {
2203 struct vc_data *conp2 = vc_cons[logo_shown].d;
2204
2205 if (conp2->vc_top == logo_lines
2206 && conp2->vc_bottom == conp2->vc_rows)
2207 conp2->vc_top = 0;
2208 logo_shown = FBCON_LOGO_CANSHOW;
2209 }
2210
2211 prev_console = ops->currcon;
2212 if (prev_console != -1)
2213 old_info = registered_fb[con2fb_map[prev_console]];
2214 /*
2215 * FIXME: If we have multiple fbdev's loaded, we need to
2216 * update all info->currcon. Perhaps, we can place this
2217 * in a centralized structure, but this might break some
2218 * drivers.
2219 *
2220 * info->currcon = vc->vc_num;
2221 */
2222 for (i = 0; i < FB_MAX; i++) {
2223 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2224 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2225
2226 o->currcon = vc->vc_num;
2227 }
2228 }
2229 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2230 display_to_var(&var, p);
2231 var.activate = FB_ACTIVATE_NOW;
2232
2233 /*
2234 * make sure we don't unnecessarily trip the memcmp()
2235 * in fb_set_var()
2236 */
2237 info->var.activate = var.activate;
2238 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2239 fb_set_var(info, &var);
2240 ops->var = info->var;
2241
2242 if (old_info != NULL && (old_info != info ||
2243 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2244 if (info->fbops->fb_set_par) {
2245 ret = info->fbops->fb_set_par(info);
2246
2247 if (ret)
2248 printk(KERN_ERR "fbcon_switch: detected "
2249 "unhandled fb_set_par error, "
2250 "error code %d\n", ret);
2251 }
2252
2253 if (old_info != info)
2254 fbcon_del_cursor_timer(old_info);
2255 }
2256
2257 if (fbcon_is_inactive(vc, info) ||
2258 ops->blank_state != FB_BLANK_UNBLANK)
2259 fbcon_del_cursor_timer(info);
2260 else
2261 fbcon_add_cursor_timer(info);
2262
2263 set_blitting_type(vc, info);
2264 ops->cursor_reset = 1;
2265
2266 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2267 ops->rotate = FB_ROTATE_UR;
2268 set_blitting_type(vc, info);
2269 }
2270
2271 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2272 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2273
2274 if (p->userfont)
2275 charcnt = FNTCHARCNT(vc->vc_font.data);
2276
2277 if (charcnt > 256)
2278 vc->vc_complement_mask <<= 1;
2279
2280 updatescrollmode(p, info, vc);
2281
2282 switch (p->scrollmode) {
2283 case SCROLL_WRAP_MOVE:
2284 scrollback_phys_max = p->vrows - vc->vc_rows;
2285 break;
2286 case SCROLL_PAN_MOVE:
2287 case SCROLL_PAN_REDRAW:
2288 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2289 if (scrollback_phys_max < 0)
2290 scrollback_phys_max = 0;
2291 break;
2292 default:
2293 scrollback_phys_max = 0;
2294 break;
2295 }
2296
2297 scrollback_max = 0;
2298 scrollback_current = 0;
2299
2300 if (!fbcon_is_inactive(vc, info)) {
2301 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2302 ops->update_start(info);
2303 }
2304
2305 fbcon_set_palette(vc, color_table);
2306 fbcon_clear_margins(vc, 0);
2307
2308 if (logo_shown == FBCON_LOGO_DRAW) {
2309
2310 logo_shown = fg_console;
2311 /* This is protected above by initmem_freed */
2312 fb_show_logo(info, ops->rotate);
2313 update_region(vc,
2314 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2315 vc->vc_size_row * (vc->vc_bottom -
2316 vc->vc_top) / 2);
2317 return 0;
2318 }
2319 return 1;
2320 }
2321
2322 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2323 int blank)
2324 {
2325 struct fb_event event;
2326
2327 if (blank) {
2328 unsigned short charmask = vc->vc_hi_font_mask ?
2329 0x1ff : 0xff;
2330 unsigned short oldc;
2331
2332 oldc = vc->vc_video_erase_char;
2333 vc->vc_video_erase_char &= charmask;
2334 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2335 vc->vc_video_erase_char = oldc;
2336 }
2337
2338
2339 if (!lock_fb_info(info))
2340 return;
2341 event.info = info;
2342 event.data = &blank;
2343 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2344 unlock_fb_info(info);
2345 }
2346
2347 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2348 {
2349 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2350 struct fbcon_ops *ops = info->fbcon_par;
2351
2352 if (mode_switch) {
2353 struct fb_var_screeninfo var = info->var;
2354
2355 ops->graphics = 1;
2356
2357 if (!blank) {
2358 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2359 fb_set_var(info, &var);
2360 ops->graphics = 0;
2361 ops->var = info->var;
2362 }
2363 }
2364
2365 if (!fbcon_is_inactive(vc, info)) {
2366 if (ops->blank_state != blank) {
2367 ops->blank_state = blank;
2368 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2369 ops->cursor_flash = (!blank);
2370
2371 if (!(info->flags & FBINFO_MISC_USEREVENT))
2372 if (fb_blank(info, blank))
2373 fbcon_generic_blank(vc, info, blank);
2374 }
2375
2376 if (!blank)
2377 update_screen(vc);
2378 }
2379
2380 if (mode_switch || fbcon_is_inactive(vc, info) ||
2381 ops->blank_state != FB_BLANK_UNBLANK)
2382 fbcon_del_cursor_timer(info);
2383 else
2384 fbcon_add_cursor_timer(info);
2385
2386 return 0;
2387 }
2388
2389 static int fbcon_debug_enter(struct vc_data *vc)
2390 {
2391 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2392 struct fbcon_ops *ops = info->fbcon_par;
2393
2394 ops->save_graphics = ops->graphics;
2395 ops->graphics = 0;
2396 if (info->fbops->fb_debug_enter)
2397 info->fbops->fb_debug_enter(info);
2398 fbcon_set_palette(vc, color_table);
2399 return 0;
2400 }
2401
2402 static int fbcon_debug_leave(struct vc_data *vc)
2403 {
2404 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2405 struct fbcon_ops *ops = info->fbcon_par;
2406
2407 ops->graphics = ops->save_graphics;
2408 if (info->fbops->fb_debug_leave)
2409 info->fbops->fb_debug_leave(info);
2410 return 0;
2411 }
2412
2413 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2414 {
2415 u8 *fontdata = vc->vc_font.data;
2416 u8 *data = font->data;
2417 int i, j;
2418
2419 font->width = vc->vc_font.width;
2420 font->height = vc->vc_font.height;
2421 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2422 if (!font->data)
2423 return 0;
2424
2425 if (font->width <= 8) {
2426 j = vc->vc_font.height;
2427 for (i = 0; i < font->charcount; i++) {
2428 memcpy(data, fontdata, j);
2429 memset(data + j, 0, 32 - j);
2430 data += 32;
2431 fontdata += j;
2432 }
2433 } else if (font->width <= 16) {
2434 j = vc->vc_font.height * 2;
2435 for (i = 0; i < font->charcount; i++) {
2436 memcpy(data, fontdata, j);
2437 memset(data + j, 0, 64 - j);
2438 data += 64;
2439 fontdata += j;
2440 }
2441 } else if (font->width <= 24) {
2442 for (i = 0; i < font->charcount; i++) {
2443 for (j = 0; j < vc->vc_font.height; j++) {
2444 *data++ = fontdata[0];
2445 *data++ = fontdata[1];
2446 *data++ = fontdata[2];
2447 fontdata += sizeof(u32);
2448 }
2449 memset(data, 0, 3 * (32 - j));
2450 data += 3 * (32 - j);
2451 }
2452 } else {
2453 j = vc->vc_font.height * 4;
2454 for (i = 0; i < font->charcount; i++) {
2455 memcpy(data, fontdata, j);
2456 memset(data + j, 0, 128 - j);
2457 data += 128;
2458 fontdata += j;
2459 }
2460 }
2461 return 0;
2462 }
2463
2464 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2465 static void set_vc_hi_font(struct vc_data *vc, bool set)
2466 {
2467 if (!set) {
2468 vc->vc_hi_font_mask = 0;
2469 if (vc->vc_can_do_color) {
2470 vc->vc_complement_mask >>= 1;
2471 vc->vc_s_complement_mask >>= 1;
2472 }
2473
2474 /* ++Edmund: reorder the attribute bits */
2475 if (vc->vc_can_do_color) {
2476 unsigned short *cp =
2477 (unsigned short *) vc->vc_origin;
2478 int count = vc->vc_screenbuf_size / 2;
2479 unsigned short c;
2480 for (; count > 0; count--, cp++) {
2481 c = scr_readw(cp);
2482 scr_writew(((c & 0xfe00) >> 1) |
2483 (c & 0xff), cp);
2484 }
2485 c = vc->vc_video_erase_char;
2486 vc->vc_video_erase_char =
2487 ((c & 0xfe00) >> 1) | (c & 0xff);
2488 vc->vc_attr >>= 1;
2489 }
2490 } else {
2491 vc->vc_hi_font_mask = 0x100;
2492 if (vc->vc_can_do_color) {
2493 vc->vc_complement_mask <<= 1;
2494 vc->vc_s_complement_mask <<= 1;
2495 }
2496
2497 /* ++Edmund: reorder the attribute bits */
2498 {
2499 unsigned short *cp =
2500 (unsigned short *) vc->vc_origin;
2501 int count = vc->vc_screenbuf_size / 2;
2502 unsigned short c;
2503 for (; count > 0; count--, cp++) {
2504 unsigned short newc;
2505 c = scr_readw(cp);
2506 if (vc->vc_can_do_color)
2507 newc =
2508 ((c & 0xff00) << 1) | (c &
2509 0xff);
2510 else
2511 newc = c & ~0x100;
2512 scr_writew(newc, cp);
2513 }
2514 c = vc->vc_video_erase_char;
2515 if (vc->vc_can_do_color) {
2516 vc->vc_video_erase_char =
2517 ((c & 0xff00) << 1) | (c & 0xff);
2518 vc->vc_attr <<= 1;
2519 } else
2520 vc->vc_video_erase_char = c & ~0x100;
2521 }
2522 }
2523 }
2524
2525 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2526 const u8 * data, int userfont)
2527 {
2528 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2529 struct fbcon_ops *ops = info->fbcon_par;
2530 struct display *p = &fb_display[vc->vc_num];
2531 int resize;
2532 int cnt;
2533 char *old_data = NULL;
2534
2535 if (con_is_visible(vc) && softback_lines)
2536 fbcon_set_origin(vc);
2537
2538 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2539 if (p->userfont)
2540 old_data = vc->vc_font.data;
2541 if (userfont)
2542 cnt = FNTCHARCNT(data);
2543 else
2544 cnt = 256;
2545 vc->vc_font.data = (void *)(p->fontdata = data);
2546 if ((p->userfont = userfont))
2547 REFCOUNT(data)++;
2548 vc->vc_font.width = w;
2549 vc->vc_font.height = h;
2550 if (vc->vc_hi_font_mask && cnt == 256)
2551 set_vc_hi_font(vc, false);
2552 else if (!vc->vc_hi_font_mask && cnt == 512)
2553 set_vc_hi_font(vc, true);
2554
2555 if (resize) {
2556 int cols, rows;
2557
2558 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2559 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2560 cols /= w;
2561 rows /= h;
2562 vc_resize(vc, cols, rows);
2563 if (con_is_visible(vc) && softback_buf)
2564 fbcon_update_softback(vc);
2565 } else if (con_is_visible(vc)
2566 && vc->vc_mode == KD_TEXT) {
2567 fbcon_clear_margins(vc, 0);
2568 update_screen(vc);
2569 }
2570
2571 if (old_data && (--REFCOUNT(old_data) == 0))
2572 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2573 return 0;
2574 }
2575
2576 static int fbcon_copy_font(struct vc_data *vc, int con)
2577 {
2578 struct display *od = &fb_display[con];
2579 struct console_font *f = &vc->vc_font;
2580
2581 if (od->fontdata == f->data)
2582 return 0; /* already the same font... */
2583 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2584 }
2585
2586 /*
2587 * User asked to set font; we are guaranteed that
2588 * a) width and height are in range 1..32
2589 * b) charcount does not exceed 512
2590 * but lets not assume that, since someone might someday want to use larger
2591 * fonts. And charcount of 512 is small for unicode support.
2592 *
2593 * However, user space gives the font in 32 rows , regardless of
2594 * actual font height. So a new API is needed if support for larger fonts
2595 * is ever implemented.
2596 */
2597
2598 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2599 {
2600 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2601 unsigned charcount = font->charcount;
2602 int w = font->width;
2603 int h = font->height;
2604 int size;
2605 int i, csum;
2606 u8 *new_data, *data = font->data;
2607 int pitch = (font->width+7) >> 3;
2608
2609 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2610 * If not this check should be changed to charcount < 256 */
2611 if (charcount != 256 && charcount != 512)
2612 return -EINVAL;
2613
2614 /* Make sure drawing engine can handle the font */
2615 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2616 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2617 return -EINVAL;
2618
2619 /* Make sure driver can handle the font length */
2620 if (fbcon_invalid_charcount(info, charcount))
2621 return -EINVAL;
2622
2623 size = h * pitch * charcount;
2624
2625 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2626
2627 if (!new_data)
2628 return -ENOMEM;
2629
2630 new_data += FONT_EXTRA_WORDS * sizeof(int);
2631 FNTSIZE(new_data) = size;
2632 FNTCHARCNT(new_data) = charcount;
2633 REFCOUNT(new_data) = 0; /* usage counter */
2634 for (i=0; i< charcount; i++) {
2635 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2636 }
2637
2638 /* Since linux has a nice crc32 function use it for counting font
2639 * checksums. */
2640 csum = crc32(0, new_data, size);
2641
2642 FNTSUM(new_data) = csum;
2643 /* Check if the same font is on some other console already */
2644 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2645 struct vc_data *tmp = vc_cons[i].d;
2646
2647 if (fb_display[i].userfont &&
2648 fb_display[i].fontdata &&
2649 FNTSUM(fb_display[i].fontdata) == csum &&
2650 FNTSIZE(fb_display[i].fontdata) == size &&
2651 tmp->vc_font.width == w &&
2652 !memcmp(fb_display[i].fontdata, new_data, size)) {
2653 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2654 new_data = (u8 *)fb_display[i].fontdata;
2655 break;
2656 }
2657 }
2658 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2659 }
2660
2661 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2662 {
2663 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2664 const struct font_desc *f;
2665
2666 if (!name)
2667 f = get_default_font(info->var.xres, info->var.yres,
2668 info->pixmap.blit_x, info->pixmap.blit_y);
2669 else if (!(f = find_font(name)))
2670 return -ENOENT;
2671
2672 font->width = f->width;
2673 font->height = f->height;
2674 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2675 }
2676
2677 static u16 palette_red[16];
2678 static u16 palette_green[16];
2679 static u16 palette_blue[16];
2680
2681 static struct fb_cmap palette_cmap = {
2682 0, 16, palette_red, palette_green, palette_blue, NULL
2683 };
2684
2685 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2686 {
2687 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2688 int i, j, k, depth;
2689 u8 val;
2690
2691 if (fbcon_is_inactive(vc, info))
2692 return;
2693
2694 if (!con_is_visible(vc))
2695 return;
2696
2697 depth = fb_get_color_depth(&info->var, &info->fix);
2698 if (depth > 3) {
2699 for (i = j = 0; i < 16; i++) {
2700 k = table[i];
2701 val = vc->vc_palette[j++];
2702 palette_red[k] = (val << 8) | val;
2703 val = vc->vc_palette[j++];
2704 palette_green[k] = (val << 8) | val;
2705 val = vc->vc_palette[j++];
2706 palette_blue[k] = (val << 8) | val;
2707 }
2708 palette_cmap.len = 16;
2709 palette_cmap.start = 0;
2710 /*
2711 * If framebuffer is capable of less than 16 colors,
2712 * use default palette of fbcon.
2713 */
2714 } else
2715 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2716
2717 fb_set_cmap(&palette_cmap, info);
2718 }
2719
2720 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2721 {
2722 unsigned long p;
2723 int line;
2724
2725 if (vc->vc_num != fg_console || !softback_lines)
2726 return (u16 *) (vc->vc_origin + offset);
2727 line = offset / vc->vc_size_row;
2728 if (line >= softback_lines)
2729 return (u16 *) (vc->vc_origin + offset -
2730 softback_lines * vc->vc_size_row);
2731 p = softback_curr + offset;
2732 if (p >= softback_end)
2733 p += softback_buf - softback_end;
2734 return (u16 *) p;
2735 }
2736
2737 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2738 int *px, int *py)
2739 {
2740 unsigned long ret;
2741 int x, y;
2742
2743 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2744 unsigned long offset = (pos - vc->vc_origin) / 2;
2745
2746 x = offset % vc->vc_cols;
2747 y = offset / vc->vc_cols;
2748 if (vc->vc_num == fg_console)
2749 y += softback_lines;
2750 ret = pos + (vc->vc_cols - x) * 2;
2751 } else if (vc->vc_num == fg_console && softback_lines) {
2752 unsigned long offset = pos - softback_curr;
2753
2754 if (pos < softback_curr)
2755 offset += softback_end - softback_buf;
2756 offset /= 2;
2757 x = offset % vc->vc_cols;
2758 y = offset / vc->vc_cols;
2759 ret = pos + (vc->vc_cols - x) * 2;
2760 if (ret == softback_end)
2761 ret = softback_buf;
2762 if (ret == softback_in)
2763 ret = vc->vc_origin;
2764 } else {
2765 /* Should not happen */
2766 x = y = 0;
2767 ret = vc->vc_origin;
2768 }
2769 if (px)
2770 *px = x;
2771 if (py)
2772 *py = y;
2773 return ret;
2774 }
2775
2776 /* As we might be inside of softback, we may work with non-contiguous buffer,
2777 that's why we have to use a separate routine. */
2778 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2779 {
2780 while (cnt--) {
2781 u16 a = scr_readw(p);
2782 if (!vc->vc_can_do_color)
2783 a ^= 0x0800;
2784 else if (vc->vc_hi_font_mask == 0x100)
2785 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2786 (((a) & 0x0e00) << 4);
2787 else
2788 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2789 (((a) & 0x0700) << 4);
2790 scr_writew(a, p++);
2791 if (p == (u16 *) softback_end)
2792 p = (u16 *) softback_buf;
2793 if (p == (u16 *) softback_in)
2794 p = (u16 *) vc->vc_origin;
2795 }
2796 }
2797
2798 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2799 {
2800 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2801 struct fbcon_ops *ops = info->fbcon_par;
2802 struct display *disp = &fb_display[fg_console];
2803 int offset, limit, scrollback_old;
2804
2805 if (softback_top) {
2806 if (vc->vc_num != fg_console)
2807 return;
2808 if (vc->vc_mode != KD_TEXT || !lines)
2809 return;
2810 if (logo_shown >= 0) {
2811 struct vc_data *conp2 = vc_cons[logo_shown].d;
2812
2813 if (conp2->vc_top == logo_lines
2814 && conp2->vc_bottom == conp2->vc_rows)
2815 conp2->vc_top = 0;
2816 if (logo_shown == vc->vc_num) {
2817 unsigned long p, q;
2818 int i;
2819
2820 p = softback_in;
2821 q = vc->vc_origin +
2822 logo_lines * vc->vc_size_row;
2823 for (i = 0; i < logo_lines; i++) {
2824 if (p == softback_top)
2825 break;
2826 if (p == softback_buf)
2827 p = softback_end;
2828 p -= vc->vc_size_row;
2829 q -= vc->vc_size_row;
2830 scr_memcpyw((u16 *) q, (u16 *) p,
2831 vc->vc_size_row);
2832 }
2833 softback_in = softback_curr = p;
2834 update_region(vc, vc->vc_origin,
2835 logo_lines * vc->vc_cols);
2836 }
2837 logo_shown = FBCON_LOGO_CANSHOW;
2838 }
2839 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2840 fbcon_redraw_softback(vc, disp, lines);
2841 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2842 return;
2843 }
2844
2845 if (!scrollback_phys_max)
2846 return;
2847
2848 scrollback_old = scrollback_current;
2849 scrollback_current -= lines;
2850 if (scrollback_current < 0)
2851 scrollback_current = 0;
2852 else if (scrollback_current > scrollback_max)
2853 scrollback_current = scrollback_max;
2854 if (scrollback_current == scrollback_old)
2855 return;
2856
2857 if (fbcon_is_inactive(vc, info))
2858 return;
2859
2860 fbcon_cursor(vc, CM_ERASE);
2861
2862 offset = disp->yscroll - scrollback_current;
2863 limit = disp->vrows;
2864 switch (disp->scrollmode) {
2865 case SCROLL_WRAP_MOVE:
2866 info->var.vmode |= FB_VMODE_YWRAP;
2867 break;
2868 case SCROLL_PAN_MOVE:
2869 case SCROLL_PAN_REDRAW:
2870 limit -= vc->vc_rows;
2871 info->var.vmode &= ~FB_VMODE_YWRAP;
2872 break;
2873 }
2874 if (offset < 0)
2875 offset += limit;
2876 else if (offset >= limit)
2877 offset -= limit;
2878
2879 ops->var.xoffset = 0;
2880 ops->var.yoffset = offset * vc->vc_font.height;
2881 ops->update_start(info);
2882
2883 if (!scrollback_current)
2884 fbcon_cursor(vc, CM_DRAW);
2885 }
2886
2887 static int fbcon_set_origin(struct vc_data *vc)
2888 {
2889 if (softback_lines)
2890 fbcon_scrolldelta(vc, softback_lines);
2891 return 0;
2892 }
2893
2894 static void fbcon_suspended(struct fb_info *info)
2895 {
2896 struct vc_data *vc = NULL;
2897 struct fbcon_ops *ops = info->fbcon_par;
2898
2899 if (!ops || ops->currcon < 0)
2900 return;
2901 vc = vc_cons[ops->currcon].d;
2902
2903 /* Clear cursor, restore saved data */
2904 fbcon_cursor(vc, CM_ERASE);
2905 }
2906
2907 static void fbcon_resumed(struct fb_info *info)
2908 {
2909 struct vc_data *vc;
2910 struct fbcon_ops *ops = info->fbcon_par;
2911
2912 if (!ops || ops->currcon < 0)
2913 return;
2914 vc = vc_cons[ops->currcon].d;
2915
2916 update_screen(vc);
2917 }
2918
2919 static void fbcon_modechanged(struct fb_info *info)
2920 {
2921 struct fbcon_ops *ops = info->fbcon_par;
2922 struct vc_data *vc;
2923 struct display *p;
2924 int rows, cols;
2925
2926 if (!ops || ops->currcon < 0)
2927 return;
2928 vc = vc_cons[ops->currcon].d;
2929 if (vc->vc_mode != KD_TEXT ||
2930 registered_fb[con2fb_map[ops->currcon]] != info)
2931 return;
2932
2933 p = &fb_display[vc->vc_num];
2934 set_blitting_type(vc, info);
2935
2936 if (con_is_visible(vc)) {
2937 var_to_display(p, &info->var, info);
2938 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2939 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2940 cols /= vc->vc_font.width;
2941 rows /= vc->vc_font.height;
2942 vc_resize(vc, cols, rows);
2943 updatescrollmode(p, info, vc);
2944 scrollback_max = 0;
2945 scrollback_current = 0;
2946
2947 if (!fbcon_is_inactive(vc, info)) {
2948 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2949 ops->update_start(info);
2950 }
2951
2952 fbcon_set_palette(vc, color_table);
2953 update_screen(vc);
2954 if (softback_buf)
2955 fbcon_update_softback(vc);
2956 }
2957 }
2958
2959 static void fbcon_set_all_vcs(struct fb_info *info)
2960 {
2961 struct fbcon_ops *ops = info->fbcon_par;
2962 struct vc_data *vc;
2963 struct display *p;
2964 int i, rows, cols, fg = -1;
2965
2966 if (!ops || ops->currcon < 0)
2967 return;
2968
2969 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2970 vc = vc_cons[i].d;
2971 if (!vc || vc->vc_mode != KD_TEXT ||
2972 registered_fb[con2fb_map[i]] != info)
2973 continue;
2974
2975 if (con_is_visible(vc)) {
2976 fg = i;
2977 continue;
2978 }
2979
2980 p = &fb_display[vc->vc_num];
2981 set_blitting_type(vc, info);
2982 var_to_display(p, &info->var, info);
2983 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2984 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2985 cols /= vc->vc_font.width;
2986 rows /= vc->vc_font.height;
2987 vc_resize(vc, cols, rows);
2988 }
2989
2990 if (fg != -1)
2991 fbcon_modechanged(info);
2992 }
2993
2994 static int fbcon_mode_deleted(struct fb_info *info,
2995 struct fb_videomode *mode)
2996 {
2997 struct fb_info *fb_info;
2998 struct display *p;
2999 int i, j, found = 0;
3000
3001 /* before deletion, ensure that mode is not in use */
3002 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3003 j = con2fb_map[i];
3004 if (j == -1)
3005 continue;
3006 fb_info = registered_fb[j];
3007 if (fb_info != info)
3008 continue;
3009 p = &fb_display[i];
3010 if (!p || !p->mode)
3011 continue;
3012 if (fb_mode_is_equal(p->mode, mode)) {
3013 found = 1;
3014 break;
3015 }
3016 }
3017 return found;
3018 }
3019
3020 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3021 static int fbcon_unbind(void)
3022 {
3023 int ret;
3024
3025 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3026 fbcon_is_default);
3027
3028 if (!ret)
3029 fbcon_has_console_bind = 0;
3030
3031 return ret;
3032 }
3033 #else
3034 static inline int fbcon_unbind(void)
3035 {
3036 return -EINVAL;
3037 }
3038 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3039
3040 /* called with console_lock held */
3041 static int fbcon_fb_unbind(int idx)
3042 {
3043 int i, new_idx = -1, ret = 0;
3044
3045 if (!fbcon_has_console_bind)
3046 return 0;
3047
3048 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3049 if (con2fb_map[i] != idx &&
3050 con2fb_map[i] != -1) {
3051 new_idx = i;
3052 break;
3053 }
3054 }
3055
3056 if (new_idx != -1) {
3057 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3058 if (con2fb_map[i] == idx)
3059 set_con2fb_map(i, new_idx, 0);
3060 }
3061 } else {
3062 struct fb_info *info = registered_fb[idx];
3063
3064 /* This is sort of like set_con2fb_map, except it maps
3065 * the consoles to no device and then releases the
3066 * oldinfo to free memory and cancel the cursor blink
3067 * timer. I can imagine this just becoming part of
3068 * set_con2fb_map where new_idx is -1
3069 */
3070 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3071 if (con2fb_map[i] == idx) {
3072 con2fb_map[i] = -1;
3073 if (!search_fb_in_map(idx)) {
3074 ret = con2fb_release_oldinfo(vc_cons[i].d,
3075 info, NULL, i,
3076 idx, 0);
3077 if (ret) {
3078 con2fb_map[i] = idx;
3079 return ret;
3080 }
3081 }
3082 }
3083 }
3084 ret = fbcon_unbind();
3085 }
3086
3087 return ret;
3088 }
3089
3090 /* called with console_lock held */
3091 static int fbcon_fb_unregistered(struct fb_info *info)
3092 {
3093 int i, idx;
3094
3095 idx = info->node;
3096 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3097 if (con2fb_map[i] == idx)
3098 con2fb_map[i] = -1;
3099 }
3100
3101 if (idx == info_idx) {
3102 info_idx = -1;
3103
3104 for (i = 0; i < FB_MAX; i++) {
3105 if (registered_fb[i] != NULL) {
3106 info_idx = i;
3107 break;
3108 }
3109 }
3110 }
3111
3112 if (info_idx != -1) {
3113 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3114 if (con2fb_map[i] == -1)
3115 con2fb_map[i] = info_idx;
3116 }
3117 }
3118
3119 if (primary_device == idx)
3120 primary_device = -1;
3121
3122 if (!num_registered_fb)
3123 do_unregister_con_driver(&fb_con);
3124
3125 return 0;
3126 }
3127
3128 /* called with console_lock held */
3129 static void fbcon_remap_all(int idx)
3130 {
3131 int i;
3132 for (i = first_fb_vc; i <= last_fb_vc; i++)
3133 set_con2fb_map(i, idx, 0);
3134
3135 if (con_is_bound(&fb_con)) {
3136 printk(KERN_INFO "fbcon: Remapping primary device, "
3137 "fb%i, to tty %i-%i\n", idx,
3138 first_fb_vc + 1, last_fb_vc + 1);
3139 info_idx = idx;
3140 }
3141 }
3142
3143 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3144 static void fbcon_select_primary(struct fb_info *info)
3145 {
3146 if (!map_override && primary_device == -1 &&
3147 fb_is_primary_device(info)) {
3148 int i;
3149
3150 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3151 info->fix.id, info->node);
3152 primary_device = info->node;
3153
3154 for (i = first_fb_vc; i <= last_fb_vc; i++)
3155 con2fb_map_boot[i] = primary_device;
3156
3157 if (con_is_bound(&fb_con)) {
3158 printk(KERN_INFO "fbcon: Remapping primary device, "
3159 "fb%i, to tty %i-%i\n", info->node,
3160 first_fb_vc + 1, last_fb_vc + 1);
3161 info_idx = primary_device;
3162 }
3163 }
3164
3165 }
3166 #else
3167 static inline void fbcon_select_primary(struct fb_info *info)
3168 {
3169 return;
3170 }
3171 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3172
3173 /* called with console_lock held */
3174 static int fbcon_fb_registered(struct fb_info *info)
3175 {
3176 int ret = 0, i, idx;
3177
3178 idx = info->node;
3179 fbcon_select_primary(info);
3180
3181 if (info_idx == -1) {
3182 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3183 if (con2fb_map_boot[i] == idx) {
3184 info_idx = idx;
3185 break;
3186 }
3187 }
3188
3189 if (info_idx != -1)
3190 ret = do_fbcon_takeover(1);
3191 } else {
3192 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3193 if (con2fb_map_boot[i] == idx)
3194 set_con2fb_map(i, idx, 0);
3195 }
3196 }
3197
3198 return ret;
3199 }
3200
3201 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3202 {
3203 struct fbcon_ops *ops = info->fbcon_par;
3204 struct vc_data *vc;
3205
3206 if (!ops || ops->currcon < 0)
3207 return;
3208
3209 vc = vc_cons[ops->currcon].d;
3210 if (vc->vc_mode != KD_TEXT ||
3211 registered_fb[con2fb_map[ops->currcon]] != info)
3212 return;
3213
3214 if (con_is_visible(vc)) {
3215 if (blank)
3216 do_blank_screen(0);
3217 else
3218 do_unblank_screen(0);
3219 }
3220 ops->blank_state = blank;
3221 }
3222
3223 static void fbcon_new_modelist(struct fb_info *info)
3224 {
3225 int i;
3226 struct vc_data *vc;
3227 struct fb_var_screeninfo var;
3228 const struct fb_videomode *mode;
3229
3230 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3231 if (registered_fb[con2fb_map[i]] != info)
3232 continue;
3233 if (!fb_display[i].mode)
3234 continue;
3235 vc = vc_cons[i].d;
3236 display_to_var(&var, &fb_display[i]);
3237 mode = fb_find_nearest_mode(fb_display[i].mode,
3238 &info->modelist);
3239 fb_videomode_to_var(&var, mode);
3240 fbcon_set_disp(info, &var, vc->vc_num);
3241 }
3242 }
3243
3244 static void fbcon_get_requirement(struct fb_info *info,
3245 struct fb_blit_caps *caps)
3246 {
3247 struct vc_data *vc;
3248 struct display *p;
3249
3250 if (caps->flags) {
3251 int i, charcnt;
3252
3253 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3254 vc = vc_cons[i].d;
3255 if (vc && vc->vc_mode == KD_TEXT &&
3256 info->node == con2fb_map[i]) {
3257 p = &fb_display[i];
3258 caps->x |= 1 << (vc->vc_font.width - 1);
3259 caps->y |= 1 << (vc->vc_font.height - 1);
3260 charcnt = (p->userfont) ?
3261 FNTCHARCNT(p->fontdata) : 256;
3262 if (caps->len < charcnt)
3263 caps->len = charcnt;
3264 }
3265 }
3266 } else {
3267 vc = vc_cons[fg_console].d;
3268
3269 if (vc && vc->vc_mode == KD_TEXT &&
3270 info->node == con2fb_map[fg_console]) {
3271 p = &fb_display[fg_console];
3272 caps->x = 1 << (vc->vc_font.width - 1);
3273 caps->y = 1 << (vc->vc_font.height - 1);
3274 caps->len = (p->userfont) ?
3275 FNTCHARCNT(p->fontdata) : 256;
3276 }
3277 }
3278 }
3279
3280 static int fbcon_event_notify(struct notifier_block *self,
3281 unsigned long action, void *data)
3282 {
3283 struct fb_event *event = data;
3284 struct fb_info *info = event->info;
3285 struct fb_videomode *mode;
3286 struct fb_con2fbmap *con2fb;
3287 struct fb_blit_caps *caps;
3288 int idx, ret = 0;
3289
3290 /*
3291 * ignore all events except driver registration and deregistration
3292 * if fbcon is not active
3293 */
3294 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3295 action == FB_EVENT_FB_UNREGISTERED))
3296 goto done;
3297
3298 switch(action) {
3299 case FB_EVENT_SUSPEND:
3300 fbcon_suspended(info);
3301 break;
3302 case FB_EVENT_RESUME:
3303 fbcon_resumed(info);
3304 break;
3305 case FB_EVENT_MODE_CHANGE:
3306 fbcon_modechanged(info);
3307 break;
3308 case FB_EVENT_MODE_CHANGE_ALL:
3309 fbcon_set_all_vcs(info);
3310 break;
3311 case FB_EVENT_MODE_DELETE:
3312 mode = event->data;
3313 ret = fbcon_mode_deleted(info, mode);
3314 break;
3315 case FB_EVENT_FB_UNBIND:
3316 idx = info->node;
3317 ret = fbcon_fb_unbind(idx);
3318 break;
3319 case FB_EVENT_FB_REGISTERED:
3320 ret = fbcon_fb_registered(info);
3321 break;
3322 case FB_EVENT_FB_UNREGISTERED:
3323 ret = fbcon_fb_unregistered(info);
3324 break;
3325 case FB_EVENT_SET_CONSOLE_MAP:
3326 /* called with console lock held */
3327 con2fb = event->data;
3328 ret = set_con2fb_map(con2fb->console - 1,
3329 con2fb->framebuffer, 1);
3330 break;
3331 case FB_EVENT_GET_CONSOLE_MAP:
3332 con2fb = event->data;
3333 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3334 break;
3335 case FB_EVENT_BLANK:
3336 fbcon_fb_blanked(info, *(int *)event->data);
3337 break;
3338 case FB_EVENT_NEW_MODELIST:
3339 fbcon_new_modelist(info);
3340 break;
3341 case FB_EVENT_GET_REQ:
3342 caps = event->data;
3343 fbcon_get_requirement(info, caps);
3344 break;
3345 case FB_EVENT_REMAP_ALL_CONSOLE:
3346 idx = info->node;
3347 fbcon_remap_all(idx);
3348 break;
3349 }
3350 done:
3351 return ret;
3352 }
3353
3354 /*
3355 * The console `switch' structure for the frame buffer based console
3356 */
3357
3358 static const struct consw fb_con = {
3359 .owner = THIS_MODULE,
3360 .con_startup = fbcon_startup,
3361 .con_init = fbcon_init,
3362 .con_deinit = fbcon_deinit,
3363 .con_clear = fbcon_clear,
3364 .con_putc = fbcon_putc,
3365 .con_putcs = fbcon_putcs,
3366 .con_cursor = fbcon_cursor,
3367 .con_scroll = fbcon_scroll,
3368 .con_switch = fbcon_switch,
3369 .con_blank = fbcon_blank,
3370 .con_font_set = fbcon_set_font,
3371 .con_font_get = fbcon_get_font,
3372 .con_font_default = fbcon_set_def_font,
3373 .con_font_copy = fbcon_copy_font,
3374 .con_set_palette = fbcon_set_palette,
3375 .con_scrolldelta = fbcon_scrolldelta,
3376 .con_set_origin = fbcon_set_origin,
3377 .con_invert_region = fbcon_invert_region,
3378 .con_screen_pos = fbcon_screen_pos,
3379 .con_getxy = fbcon_getxy,
3380 .con_resize = fbcon_resize,
3381 .con_debug_enter = fbcon_debug_enter,
3382 .con_debug_leave = fbcon_debug_leave,
3383 };
3384
3385 static struct notifier_block fbcon_event_notifier = {
3386 .notifier_call = fbcon_event_notify,
3387 };
3388
3389 static ssize_t store_rotate(struct device *device,
3390 struct device_attribute *attr, const char *buf,
3391 size_t count)
3392 {
3393 struct fb_info *info;
3394 int rotate, idx;
3395 char **last = NULL;
3396
3397 if (fbcon_has_exited)
3398 return count;
3399
3400 console_lock();
3401 idx = con2fb_map[fg_console];
3402
3403 if (idx == -1 || registered_fb[idx] == NULL)
3404 goto err;
3405
3406 info = registered_fb[idx];
3407 rotate = simple_strtoul(buf, last, 0);
3408 fbcon_rotate(info, rotate);
3409 err:
3410 console_unlock();
3411 return count;
3412 }
3413
3414 static ssize_t store_rotate_all(struct device *device,
3415 struct device_attribute *attr,const char *buf,
3416 size_t count)
3417 {
3418 struct fb_info *info;
3419 int rotate, idx;
3420 char **last = NULL;
3421
3422 if (fbcon_has_exited)
3423 return count;
3424
3425 console_lock();
3426 idx = con2fb_map[fg_console];
3427
3428 if (idx == -1 || registered_fb[idx] == NULL)
3429 goto err;
3430
3431 info = registered_fb[idx];
3432 rotate = simple_strtoul(buf, last, 0);
3433 fbcon_rotate_all(info, rotate);
3434 err:
3435 console_unlock();
3436 return count;
3437 }
3438
3439 static ssize_t show_rotate(struct device *device,
3440 struct device_attribute *attr,char *buf)
3441 {
3442 struct fb_info *info;
3443 int rotate = 0, idx;
3444
3445 if (fbcon_has_exited)
3446 return 0;
3447
3448 console_lock();
3449 idx = con2fb_map[fg_console];
3450
3451 if (idx == -1 || registered_fb[idx] == NULL)
3452 goto err;
3453
3454 info = registered_fb[idx];
3455 rotate = fbcon_get_rotate(info);
3456 err:
3457 console_unlock();
3458 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3459 }
3460
3461 static ssize_t show_cursor_blink(struct device *device,
3462 struct device_attribute *attr, char *buf)
3463 {
3464 struct fb_info *info;
3465 struct fbcon_ops *ops;
3466 int idx, blink = -1;
3467
3468 if (fbcon_has_exited)
3469 return 0;
3470
3471 console_lock();
3472 idx = con2fb_map[fg_console];
3473
3474 if (idx == -1 || registered_fb[idx] == NULL)
3475 goto err;
3476
3477 info = registered_fb[idx];
3478 ops = info->fbcon_par;
3479
3480 if (!ops)
3481 goto err;
3482
3483 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3484 err:
3485 console_unlock();
3486 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3487 }
3488
3489 static ssize_t store_cursor_blink(struct device *device,
3490 struct device_attribute *attr,
3491 const char *buf, size_t count)
3492 {
3493 struct fb_info *info;
3494 int blink, idx;
3495 char **last = NULL;
3496
3497 if (fbcon_has_exited)
3498 return count;
3499
3500 console_lock();
3501 idx = con2fb_map[fg_console];
3502
3503 if (idx == -1 || registered_fb[idx] == NULL)
3504 goto err;
3505
3506 info = registered_fb[idx];
3507
3508 if (!info->fbcon_par)
3509 goto err;
3510
3511 blink = simple_strtoul(buf, last, 0);
3512
3513 if (blink) {
3514 fbcon_cursor_noblink = 0;
3515 fbcon_add_cursor_timer(info);
3516 } else {
3517 fbcon_cursor_noblink = 1;
3518 fbcon_del_cursor_timer(info);
3519 }
3520
3521 err:
3522 console_unlock();
3523 return count;
3524 }
3525
3526 static struct device_attribute device_attrs[] = {
3527 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3528 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3529 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3530 store_cursor_blink),
3531 };
3532
3533 static int fbcon_init_device(void)
3534 {
3535 int i, error = 0;
3536
3537 fbcon_has_sysfs = 1;
3538
3539 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3540 error = device_create_file(fbcon_device, &device_attrs[i]);
3541
3542 if (error)
3543 break;
3544 }
3545
3546 if (error) {
3547 while (--i >= 0)
3548 device_remove_file(fbcon_device, &device_attrs[i]);
3549
3550 fbcon_has_sysfs = 0;
3551 }
3552
3553 return 0;
3554 }
3555
3556 static void fbcon_start(void)
3557 {
3558 if (num_registered_fb) {
3559 int i;
3560
3561 console_lock();
3562
3563 for (i = 0; i < FB_MAX; i++) {
3564 if (registered_fb[i] != NULL) {
3565 info_idx = i;
3566 break;
3567 }
3568 }
3569
3570 do_fbcon_takeover(0);
3571 console_unlock();
3572
3573 }
3574 }
3575
3576 static void fbcon_exit(void)
3577 {
3578 struct fb_info *info;
3579 int i, j, mapped;
3580
3581 if (fbcon_has_exited)
3582 return;
3583
3584 kfree((void *)softback_buf);
3585 softback_buf = 0UL;
3586
3587 for (i = 0; i < FB_MAX; i++) {
3588 int pending = 0;
3589
3590 mapped = 0;
3591 info = registered_fb[i];
3592
3593 if (info == NULL)
3594 continue;
3595
3596 if (info->queue.func)
3597 pending = cancel_work_sync(&info->queue);
3598 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3599 "no"));
3600
3601 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3602 if (con2fb_map[j] == i) {
3603 mapped = 1;
3604 break;
3605 }
3606 }
3607
3608 if (mapped) {
3609 if (info->fbops->fb_release)
3610 info->fbops->fb_release(info, 0);
3611 module_put(info->fbops->owner);
3612
3613 if (info->fbcon_par) {
3614 struct fbcon_ops *ops = info->fbcon_par;
3615
3616 fbcon_del_cursor_timer(info);
3617 kfree(ops->cursor_src);
3618 kfree(ops->cursor_state.mask);
3619 kfree(info->fbcon_par);
3620 info->fbcon_par = NULL;
3621 }
3622
3623 if (info->queue.func == fb_flashcursor)
3624 info->queue.func = NULL;
3625 }
3626 }
3627
3628 fbcon_has_exited = 1;
3629 }
3630
3631 void __init fb_console_init(void)
3632 {
3633 int i;
3634
3635 console_lock();
3636 fb_register_client(&fbcon_event_notifier);
3637 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3638 "fbcon");
3639
3640 if (IS_ERR(fbcon_device)) {
3641 printk(KERN_WARNING "Unable to create device "
3642 "for fbcon; errno = %ld\n",
3643 PTR_ERR(fbcon_device));
3644 fbcon_device = NULL;
3645 } else
3646 fbcon_init_device();
3647
3648 for (i = 0; i < MAX_NR_CONSOLES; i++)
3649 con2fb_map[i] = -1;
3650
3651 console_unlock();
3652 fbcon_start();
3653 }
3654
3655 #ifdef MODULE
3656
3657 static void __exit fbcon_deinit_device(void)
3658 {
3659 int i;
3660
3661 if (fbcon_has_sysfs) {
3662 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3663 device_remove_file(fbcon_device, &device_attrs[i]);
3664
3665 fbcon_has_sysfs = 0;
3666 }
3667 }
3668
3669 void __exit fb_console_exit(void)
3670 {
3671 console_lock();
3672 fb_unregister_client(&fbcon_event_notifier);
3673 fbcon_deinit_device();
3674 device_destroy(fb_class, MKDEV(0, 0));
3675 fbcon_exit();
3676 do_unregister_con_driver(&fb_con);
3677 console_unlock();
3678 }
3679 #endif
Linux with added FPC-III support