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fbcon: when font is freed, clear also vc_font.data
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / video / console / fbcon.c
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/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80
81 #include "fbcon.h"
82
83 #ifdef FBCONDEBUG
84 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
85 #else
86 # define DPRINTK(fmt, args...)
87 #endif
88
89 enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93 };
94
95 static struct display fb_display[MAX_NR_CONSOLES];
96
97 static signed char con2fb_map[MAX_NR_CONSOLES];
98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
99
100 static int logo_lines;
101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103 static int logo_shown = FBCON_LOGO_CANSHOW;
104 /* Software scrollback */
105 static int fbcon_softback_size = 32768;
106 static unsigned long softback_buf, softback_curr;
107 static unsigned long softback_in;
108 static unsigned long softback_top, softback_end;
109 static int softback_lines;
110 /* console mappings */
111 static int first_fb_vc;
112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
113 static int fbcon_is_default = 1;
114 static int fbcon_has_exited;
115 static int primary_device = -1;
116 static int fbcon_has_console_bind;
117
118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
119 static int map_override;
120
121 static inline void fbcon_map_override(void)
122 {
123 map_override = 1;
124 }
125 #else
126 static inline void fbcon_map_override(void)
127 {
128 }
129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
131 /* font data */
132 static char fontname[40];
133
134 /* current fb_info */
135 static int info_idx = -1;
136
137 /* console rotation */
138 static int initial_rotation;
139 static int fbcon_has_sysfs;
140
141 static const struct consw fb_con;
142
143 #define CM_SOFTBACK (8)
144
145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
147 static int fbcon_set_origin(struct vc_data *);
148
149 #define CURSOR_DRAW_DELAY (1)
150
151 static int vbl_cursor_cnt;
152 static int fbcon_cursor_noblink;
153
154 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
155
156 /*
157 * Interface used by the world
158 */
159
160 static const char *fbcon_startup(void);
161 static void fbcon_init(struct vc_data *vc, int init);
162 static void fbcon_deinit(struct vc_data *vc);
163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
164 int width);
165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
167 int count, int ypos, int xpos);
168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
169 static void fbcon_cursor(struct vc_data *vc, int mode);
170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
171 int count);
172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
173 int height, int width);
174 static int fbcon_switch(struct vc_data *vc);
175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
178
179 /*
180 * Internal routines
181 */
182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
184 static __inline__ void ypan_up(struct vc_data *vc, int count);
185 static __inline__ void ypan_down(struct vc_data *vc, int count);
186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
187 int dy, int dx, int height, int width, u_int y_break);
188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 int unit);
190 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
191 int line, int count, int dy);
192 static void fbcon_modechanged(struct fb_info *info);
193 static void fbcon_set_all_vcs(struct fb_info *info);
194 static void fbcon_start(void);
195 static void fbcon_exit(void);
196 static struct device *fbcon_device;
197
198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
199 static inline void fbcon_set_rotation(struct fb_info *info)
200 {
201 struct fbcon_ops *ops = info->fbcon_par;
202
203 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
204 ops->p->con_rotate < 4)
205 ops->rotate = ops->p->con_rotate;
206 else
207 ops->rotate = 0;
208 }
209
210 static void fbcon_rotate(struct fb_info *info, u32 rotate)
211 {
212 struct fbcon_ops *ops= info->fbcon_par;
213 struct fb_info *fb_info;
214
215 if (!ops || ops->currcon == -1)
216 return;
217
218 fb_info = registered_fb[con2fb_map[ops->currcon]];
219
220 if (info == fb_info) {
221 struct display *p = &fb_display[ops->currcon];
222
223 if (rotate < 4)
224 p->con_rotate = rotate;
225 else
226 p->con_rotate = 0;
227
228 fbcon_modechanged(info);
229 }
230 }
231
232 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
233 {
234 struct fbcon_ops *ops = info->fbcon_par;
235 struct vc_data *vc;
236 struct display *p;
237 int i;
238
239 if (!ops || ops->currcon < 0 || rotate > 3)
240 return;
241
242 for (i = first_fb_vc; i <= last_fb_vc; i++) {
243 vc = vc_cons[i].d;
244 if (!vc || vc->vc_mode != KD_TEXT ||
245 registered_fb[con2fb_map[i]] != info)
246 continue;
247
248 p = &fb_display[vc->vc_num];
249 p->con_rotate = rotate;
250 }
251
252 fbcon_set_all_vcs(info);
253 }
254 #else
255 static inline void fbcon_set_rotation(struct fb_info *info)
256 {
257 struct fbcon_ops *ops = info->fbcon_par;
258
259 ops->rotate = FB_ROTATE_UR;
260 }
261
262 static void fbcon_rotate(struct fb_info *info, u32 rotate)
263 {
264 return;
265 }
266
267 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
268 {
269 return;
270 }
271 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
272
273 static int fbcon_get_rotate(struct fb_info *info)
274 {
275 struct fbcon_ops *ops = info->fbcon_par;
276
277 return (ops) ? ops->rotate : 0;
278 }
279
280 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
281 {
282 struct fbcon_ops *ops = info->fbcon_par;
283
284 return (info->state != FBINFO_STATE_RUNNING ||
285 vc->vc_mode != KD_TEXT || ops->graphics) &&
286 !vt_force_oops_output(vc);
287 }
288
289 static int get_color(struct vc_data *vc, struct fb_info *info,
290 u16 c, int is_fg)
291 {
292 int depth = fb_get_color_depth(&info->var, &info->fix);
293 int color = 0;
294
295 if (console_blanked) {
296 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
297
298 c = vc->vc_video_erase_char & charmask;
299 }
300
301 if (depth != 1)
302 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
303 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
304
305 switch (depth) {
306 case 1:
307 {
308 int col = mono_col(info);
309 /* 0 or 1 */
310 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
311 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
312
313 if (console_blanked)
314 fg = bg;
315
316 color = (is_fg) ? fg : bg;
317 break;
318 }
319 case 2:
320 /*
321 * Scale down 16-colors to 4 colors. Default 4-color palette
322 * is grayscale. However, simply dividing the values by 4
323 * will not work, as colors 1, 2 and 3 will be scaled-down
324 * to zero rendering them invisible. So empirically convert
325 * colors to a sane 4-level grayscale.
326 */
327 switch (color) {
328 case 0:
329 color = 0; /* black */
330 break;
331 case 1 ... 6:
332 color = 2; /* white */
333 break;
334 case 7 ... 8:
335 color = 1; /* gray */
336 break;
337 default:
338 color = 3; /* intense white */
339 break;
340 }
341 break;
342 case 3:
343 /*
344 * Last 8 entries of default 16-color palette is a more intense
345 * version of the first 8 (i.e., same chrominance, different
346 * luminance).
347 */
348 color &= 7;
349 break;
350 }
351
352
353 return color;
354 }
355
356 static void fbcon_update_softback(struct vc_data *vc)
357 {
358 int l = fbcon_softback_size / vc->vc_size_row;
359
360 if (l > 5)
361 softback_end = softback_buf + l * vc->vc_size_row;
362 else
363 /* Smaller scrollback makes no sense, and 0 would screw
364 the operation totally */
365 softback_top = 0;
366 }
367
368 static void fb_flashcursor(struct work_struct *work)
369 {
370 struct fb_info *info = container_of(work, struct fb_info, queue);
371 struct fbcon_ops *ops = info->fbcon_par;
372 struct vc_data *vc = NULL;
373 int c;
374 int mode;
375 int ret;
376
377 /* FIXME: we should sort out the unbind locking instead */
378 /* instead we just fail to flash the cursor if we can't get
379 * the lock instead of blocking fbcon deinit */
380 ret = console_trylock();
381 if (ret == 0)
382 return;
383
384 if (ops && ops->currcon != -1)
385 vc = vc_cons[ops->currcon].d;
386
387 if (!vc || !CON_IS_VISIBLE(vc) ||
388 registered_fb[con2fb_map[vc->vc_num]] != info ||
389 vc->vc_deccm != 1) {
390 console_unlock();
391 return;
392 }
393
394 c = scr_readw((u16 *) vc->vc_pos);
395 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
396 CM_ERASE : CM_DRAW;
397 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
398 get_color(vc, info, c, 0));
399 console_unlock();
400 }
401
402 static void cursor_timer_handler(unsigned long dev_addr)
403 {
404 struct fb_info *info = (struct fb_info *) dev_addr;
405 struct fbcon_ops *ops = info->fbcon_par;
406
407 schedule_work(&info->queue);
408 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
409 }
410
411 static void fbcon_add_cursor_timer(struct fb_info *info)
412 {
413 struct fbcon_ops *ops = info->fbcon_par;
414
415 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
416 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
417 !fbcon_cursor_noblink) {
418 if (!info->queue.func)
419 INIT_WORK(&info->queue, fb_flashcursor);
420
421 init_timer(&ops->cursor_timer);
422 ops->cursor_timer.function = cursor_timer_handler;
423 ops->cursor_timer.expires = jiffies + HZ / 5;
424 ops->cursor_timer.data = (unsigned long ) info;
425 add_timer(&ops->cursor_timer);
426 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
427 }
428 }
429
430 static void fbcon_del_cursor_timer(struct fb_info *info)
431 {
432 struct fbcon_ops *ops = info->fbcon_par;
433
434 if (info->queue.func == fb_flashcursor &&
435 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
436 del_timer_sync(&ops->cursor_timer);
437 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
438 }
439 }
440
441 #ifndef MODULE
442 static int __init fb_console_setup(char *this_opt)
443 {
444 char *options;
445 int i, j;
446
447 if (!this_opt || !*this_opt)
448 return 1;
449
450 while ((options = strsep(&this_opt, ",")) != NULL) {
451 if (!strncmp(options, "font:", 5))
452 strlcpy(fontname, options + 5, sizeof(fontname));
453
454 if (!strncmp(options, "scrollback:", 11)) {
455 options += 11;
456 if (*options) {
457 fbcon_softback_size = simple_strtoul(options, &options, 0);
458 if (*options == 'k' || *options == 'K') {
459 fbcon_softback_size *= 1024;
460 options++;
461 }
462 if (*options != ',')
463 return 1;
464 options++;
465 } else
466 return 1;
467 }
468
469 if (!strncmp(options, "map:", 4)) {
470 options += 4;
471 if (*options) {
472 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
473 if (!options[j])
474 j = 0;
475 con2fb_map_boot[i] =
476 (options[j++]-'0') % FB_MAX;
477 }
478
479 fbcon_map_override();
480 }
481
482 return 1;
483 }
484
485 if (!strncmp(options, "vc:", 3)) {
486 options += 3;
487 if (*options)
488 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
489 if (first_fb_vc < 0)
490 first_fb_vc = 0;
491 if (*options++ == '-')
492 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
493 fbcon_is_default = 0;
494 }
495
496 if (!strncmp(options, "rotate:", 7)) {
497 options += 7;
498 if (*options)
499 initial_rotation = simple_strtoul(options, &options, 0);
500 if (initial_rotation > 3)
501 initial_rotation = 0;
502 }
503 }
504 return 1;
505 }
506
507 __setup("fbcon=", fb_console_setup);
508 #endif
509
510 static int search_fb_in_map(int idx)
511 {
512 int i, retval = 0;
513
514 for (i = first_fb_vc; i <= last_fb_vc; i++) {
515 if (con2fb_map[i] == idx)
516 retval = 1;
517 }
518 return retval;
519 }
520
521 static int search_for_mapped_con(void)
522 {
523 int i, retval = 0;
524
525 for (i = first_fb_vc; i <= last_fb_vc; i++) {
526 if (con2fb_map[i] != -1)
527 retval = 1;
528 }
529 return retval;
530 }
531
532 static int do_fbcon_takeover(int show_logo)
533 {
534 int err, i;
535
536 if (!num_registered_fb)
537 return -ENODEV;
538
539 if (!show_logo)
540 logo_shown = FBCON_LOGO_DONTSHOW;
541
542 for (i = first_fb_vc; i <= last_fb_vc; i++)
543 con2fb_map[i] = info_idx;
544
545 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
546 fbcon_is_default);
547
548 if (err) {
549 for (i = first_fb_vc; i <= last_fb_vc; i++)
550 con2fb_map[i] = -1;
551 info_idx = -1;
552 } else {
553 fbcon_has_console_bind = 1;
554 }
555
556 return err;
557 }
558
559 static int fbcon_takeover(int show_logo)
560 {
561 int err, i;
562
563 if (!num_registered_fb)
564 return -ENODEV;
565
566 if (!show_logo)
567 logo_shown = FBCON_LOGO_DONTSHOW;
568
569 for (i = first_fb_vc; i <= last_fb_vc; i++)
570 con2fb_map[i] = info_idx;
571
572 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
573 fbcon_is_default);
574
575 if (err) {
576 for (i = first_fb_vc; i <= last_fb_vc; i++) {
577 con2fb_map[i] = -1;
578 }
579 info_idx = -1;
580 } else {
581 fbcon_has_console_bind = 1;
582 }
583
584 return err;
585 }
586
587 #ifdef MODULE
588 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
589 int cols, int rows, int new_cols, int new_rows)
590 {
591 logo_shown = FBCON_LOGO_DONTSHOW;
592 }
593 #else
594 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
595 int cols, int rows, int new_cols, int new_rows)
596 {
597 /* Need to make room for the logo */
598 struct fbcon_ops *ops = info->fbcon_par;
599 int cnt, erase = vc->vc_video_erase_char, step;
600 unsigned short *save = NULL, *r, *q;
601 int logo_height;
602
603 if (info->flags & FBINFO_MODULE) {
604 logo_shown = FBCON_LOGO_DONTSHOW;
605 return;
606 }
607
608 /*
609 * remove underline attribute from erase character
610 * if black and white framebuffer.
611 */
612 if (fb_get_color_depth(&info->var, &info->fix) == 1)
613 erase &= ~0x400;
614 logo_height = fb_prepare_logo(info, ops->rotate);
615 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
616 q = (unsigned short *) (vc->vc_origin +
617 vc->vc_size_row * rows);
618 step = logo_lines * cols;
619 for (r = q - logo_lines * cols; r < q; r++)
620 if (scr_readw(r) != vc->vc_video_erase_char)
621 break;
622 if (r != q && new_rows >= rows + logo_lines) {
623 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
624 if (save) {
625 int i = cols < new_cols ? cols : new_cols;
626 scr_memsetw(save, erase, logo_lines * new_cols * 2);
627 r = q - step;
628 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
629 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
630 r = q;
631 }
632 }
633 if (r == q) {
634 /* We can scroll screen down */
635 r = q - step - cols;
636 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
637 scr_memcpyw(r + step, r, vc->vc_size_row);
638 r -= cols;
639 }
640 if (!save) {
641 int lines;
642 if (vc->vc_y + logo_lines >= rows)
643 lines = rows - vc->vc_y - 1;
644 else
645 lines = logo_lines;
646 vc->vc_y += lines;
647 vc->vc_pos += lines * vc->vc_size_row;
648 }
649 }
650 scr_memsetw((unsigned short *) vc->vc_origin,
651 erase,
652 vc->vc_size_row * logo_lines);
653
654 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
655 fbcon_clear_margins(vc, 0);
656 update_screen(vc);
657 }
658
659 if (save) {
660 q = (unsigned short *) (vc->vc_origin +
661 vc->vc_size_row *
662 rows);
663 scr_memcpyw(q, save, logo_lines * new_cols * 2);
664 vc->vc_y += logo_lines;
665 vc->vc_pos += logo_lines * vc->vc_size_row;
666 kfree(save);
667 }
668
669 if (logo_lines > vc->vc_bottom) {
670 logo_shown = FBCON_LOGO_CANSHOW;
671 printk(KERN_INFO
672 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
673 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
674 logo_shown = FBCON_LOGO_DRAW;
675 vc->vc_top = logo_lines;
676 }
677 }
678 #endif /* MODULE */
679
680 #ifdef CONFIG_FB_TILEBLITTING
681 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
682 {
683 struct fbcon_ops *ops = info->fbcon_par;
684
685 ops->p = &fb_display[vc->vc_num];
686
687 if ((info->flags & FBINFO_MISC_TILEBLITTING))
688 fbcon_set_tileops(vc, info);
689 else {
690 fbcon_set_rotation(info);
691 fbcon_set_bitops(ops);
692 }
693 }
694
695 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
696 {
697 int err = 0;
698
699 if (info->flags & FBINFO_MISC_TILEBLITTING &&
700 info->tileops->fb_get_tilemax(info) < charcount)
701 err = 1;
702
703 return err;
704 }
705 #else
706 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
707 {
708 struct fbcon_ops *ops = info->fbcon_par;
709
710 info->flags &= ~FBINFO_MISC_TILEBLITTING;
711 ops->p = &fb_display[vc->vc_num];
712 fbcon_set_rotation(info);
713 fbcon_set_bitops(ops);
714 }
715
716 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
717 {
718 return 0;
719 }
720
721 #endif /* CONFIG_MISC_TILEBLITTING */
722
723
724 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
725 int unit, int oldidx)
726 {
727 struct fbcon_ops *ops = NULL;
728 int err = 0;
729
730 if (!try_module_get(info->fbops->owner))
731 err = -ENODEV;
732
733 if (!err && info->fbops->fb_open &&
734 info->fbops->fb_open(info, 0))
735 err = -ENODEV;
736
737 if (!err) {
738 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
739 if (!ops)
740 err = -ENOMEM;
741 }
742
743 if (!err) {
744 info->fbcon_par = ops;
745
746 if (vc)
747 set_blitting_type(vc, info);
748 }
749
750 if (err) {
751 con2fb_map[unit] = oldidx;
752 module_put(info->fbops->owner);
753 }
754
755 return err;
756 }
757
758 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
759 struct fb_info *newinfo, int unit,
760 int oldidx, int found)
761 {
762 struct fbcon_ops *ops = oldinfo->fbcon_par;
763 int err = 0, ret;
764
765 if (oldinfo->fbops->fb_release &&
766 oldinfo->fbops->fb_release(oldinfo, 0)) {
767 con2fb_map[unit] = oldidx;
768 if (!found && newinfo->fbops->fb_release)
769 newinfo->fbops->fb_release(newinfo, 0);
770 if (!found)
771 module_put(newinfo->fbops->owner);
772 err = -ENODEV;
773 }
774
775 if (!err) {
776 fbcon_del_cursor_timer(oldinfo);
777 kfree(ops->cursor_state.mask);
778 kfree(ops->cursor_data);
779 kfree(ops->fontbuffer);
780 kfree(oldinfo->fbcon_par);
781 oldinfo->fbcon_par = NULL;
782 module_put(oldinfo->fbops->owner);
783 /*
784 If oldinfo and newinfo are driving the same hardware,
785 the fb_release() method of oldinfo may attempt to
786 restore the hardware state. This will leave the
787 newinfo in an undefined state. Thus, a call to
788 fb_set_par() may be needed for the newinfo.
789 */
790 if (newinfo->fbops->fb_set_par) {
791 ret = newinfo->fbops->fb_set_par(newinfo);
792
793 if (ret)
794 printk(KERN_ERR "con2fb_release_oldinfo: "
795 "detected unhandled fb_set_par error, "
796 "error code %d\n", ret);
797 }
798 }
799
800 return err;
801 }
802
803 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
804 int unit, int show_logo)
805 {
806 struct fbcon_ops *ops = info->fbcon_par;
807 int ret;
808
809 ops->currcon = fg_console;
810
811 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
812 ret = info->fbops->fb_set_par(info);
813
814 if (ret)
815 printk(KERN_ERR "con2fb_init_display: detected "
816 "unhandled fb_set_par error, "
817 "error code %d\n", ret);
818 }
819
820 ops->flags |= FBCON_FLAGS_INIT;
821 ops->graphics = 0;
822 fbcon_set_disp(info, &info->var, unit);
823
824 if (show_logo) {
825 struct vc_data *fg_vc = vc_cons[fg_console].d;
826 struct fb_info *fg_info =
827 registered_fb[con2fb_map[fg_console]];
828
829 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
830 fg_vc->vc_rows, fg_vc->vc_cols,
831 fg_vc->vc_rows);
832 }
833
834 update_screen(vc_cons[fg_console].d);
835 }
836
837 /**
838 * set_con2fb_map - map console to frame buffer device
839 * @unit: virtual console number to map
840 * @newidx: frame buffer index to map virtual console to
841 * @user: user request
842 *
843 * Maps a virtual console @unit to a frame buffer device
844 * @newidx.
845 *
846 * This should be called with the console lock held.
847 */
848 static int set_con2fb_map(int unit, int newidx, int user)
849 {
850 struct vc_data *vc = vc_cons[unit].d;
851 int oldidx = con2fb_map[unit];
852 struct fb_info *info = registered_fb[newidx];
853 struct fb_info *oldinfo = NULL;
854 int found, err = 0;
855
856 if (oldidx == newidx)
857 return 0;
858
859 if (!info)
860 return -EINVAL;
861
862 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
863 info_idx = newidx;
864 return do_fbcon_takeover(0);
865 }
866
867 if (oldidx != -1)
868 oldinfo = registered_fb[oldidx];
869
870 found = search_fb_in_map(newidx);
871
872 con2fb_map[unit] = newidx;
873 if (!err && !found)
874 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
875
876
877 /*
878 * If old fb is not mapped to any of the consoles,
879 * fbcon should release it.
880 */
881 if (!err && oldinfo && !search_fb_in_map(oldidx))
882 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
883 found);
884
885 if (!err) {
886 int show_logo = (fg_console == 0 && !user &&
887 logo_shown != FBCON_LOGO_DONTSHOW);
888
889 if (!found)
890 fbcon_add_cursor_timer(info);
891 con2fb_map_boot[unit] = newidx;
892 con2fb_init_display(vc, info, unit, show_logo);
893 }
894
895 if (!search_fb_in_map(info_idx))
896 info_idx = newidx;
897
898 return err;
899 }
900
901 /*
902 * Low Level Operations
903 */
904 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
905 static int var_to_display(struct display *disp,
906 struct fb_var_screeninfo *var,
907 struct fb_info *info)
908 {
909 disp->xres_virtual = var->xres_virtual;
910 disp->yres_virtual = var->yres_virtual;
911 disp->bits_per_pixel = var->bits_per_pixel;
912 disp->grayscale = var->grayscale;
913 disp->nonstd = var->nonstd;
914 disp->accel_flags = var->accel_flags;
915 disp->height = var->height;
916 disp->width = var->width;
917 disp->red = var->red;
918 disp->green = var->green;
919 disp->blue = var->blue;
920 disp->transp = var->transp;
921 disp->rotate = var->rotate;
922 disp->mode = fb_match_mode(var, &info->modelist);
923 if (disp->mode == NULL)
924 /* This should not happen */
925 return -EINVAL;
926 return 0;
927 }
928
929 static void display_to_var(struct fb_var_screeninfo *var,
930 struct display *disp)
931 {
932 fb_videomode_to_var(var, disp->mode);
933 var->xres_virtual = disp->xres_virtual;
934 var->yres_virtual = disp->yres_virtual;
935 var->bits_per_pixel = disp->bits_per_pixel;
936 var->grayscale = disp->grayscale;
937 var->nonstd = disp->nonstd;
938 var->accel_flags = disp->accel_flags;
939 var->height = disp->height;
940 var->width = disp->width;
941 var->red = disp->red;
942 var->green = disp->green;
943 var->blue = disp->blue;
944 var->transp = disp->transp;
945 var->rotate = disp->rotate;
946 }
947
948 static const char *fbcon_startup(void)
949 {
950 const char *display_desc = "frame buffer device";
951 struct display *p = &fb_display[fg_console];
952 struct vc_data *vc = vc_cons[fg_console].d;
953 const struct font_desc *font = NULL;
954 struct module *owner;
955 struct fb_info *info = NULL;
956 struct fbcon_ops *ops;
957 int rows, cols;
958
959 /*
960 * If num_registered_fb is zero, this is a call for the dummy part.
961 * The frame buffer devices weren't initialized yet.
962 */
963 if (!num_registered_fb || info_idx == -1)
964 return display_desc;
965 /*
966 * Instead of blindly using registered_fb[0], we use info_idx, set by
967 * fb_console_init();
968 */
969 info = registered_fb[info_idx];
970 if (!info)
971 return NULL;
972
973 owner = info->fbops->owner;
974 if (!try_module_get(owner))
975 return NULL;
976 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
977 module_put(owner);
978 return NULL;
979 }
980
981 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
982 if (!ops) {
983 module_put(owner);
984 return NULL;
985 }
986
987 ops->currcon = -1;
988 ops->graphics = 1;
989 ops->cur_rotate = -1;
990 info->fbcon_par = ops;
991 p->con_rotate = initial_rotation;
992 set_blitting_type(vc, info);
993
994 if (info->fix.type != FB_TYPE_TEXT) {
995 if (fbcon_softback_size) {
996 if (!softback_buf) {
997 softback_buf =
998 (unsigned long)
999 kmalloc(fbcon_softback_size,
1000 GFP_KERNEL);
1001 if (!softback_buf) {
1002 fbcon_softback_size = 0;
1003 softback_top = 0;
1004 }
1005 }
1006 } else {
1007 if (softback_buf) {
1008 kfree((void *) softback_buf);
1009 softback_buf = 0;
1010 softback_top = 0;
1011 }
1012 }
1013 if (softback_buf)
1014 softback_in = softback_top = softback_curr =
1015 softback_buf;
1016 softback_lines = 0;
1017 }
1018
1019 /* Setup default font */
1020 if (!p->fontdata && !vc->vc_font.data) {
1021 if (!fontname[0] || !(font = find_font(fontname)))
1022 font = get_default_font(info->var.xres,
1023 info->var.yres,
1024 info->pixmap.blit_x,
1025 info->pixmap.blit_y);
1026 vc->vc_font.width = font->width;
1027 vc->vc_font.height = font->height;
1028 vc->vc_font.data = (void *)(p->fontdata = font->data);
1029 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1030 } else {
1031 p->fontdata = vc->vc_font.data;
1032 }
1033
1034 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1035 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1036 cols /= vc->vc_font.width;
1037 rows /= vc->vc_font.height;
1038 vc_resize(vc, cols, rows);
1039
1040 DPRINTK("mode: %s\n", info->fix.id);
1041 DPRINTK("visual: %d\n", info->fix.visual);
1042 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1043 info->var.yres,
1044 info->var.bits_per_pixel);
1045
1046 fbcon_add_cursor_timer(info);
1047 fbcon_has_exited = 0;
1048 return display_desc;
1049 }
1050
1051 static void fbcon_init(struct vc_data *vc, int init)
1052 {
1053 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1054 struct fbcon_ops *ops;
1055 struct vc_data **default_mode = vc->vc_display_fg;
1056 struct vc_data *svc = *default_mode;
1057 struct display *t, *p = &fb_display[vc->vc_num];
1058 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1059 int cap, ret;
1060
1061 if (info_idx == -1 || info == NULL)
1062 return;
1063
1064 cap = info->flags;
1065
1066 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1067 (info->fix.type == FB_TYPE_TEXT))
1068 logo = 0;
1069
1070 if (var_to_display(p, &info->var, info))
1071 return;
1072
1073 if (!info->fbcon_par)
1074 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1075
1076 /* If we are not the first console on this
1077 fb, copy the font from that console */
1078 t = &fb_display[fg_console];
1079 if (!p->fontdata) {
1080 if (t->fontdata) {
1081 struct vc_data *fvc = vc_cons[fg_console].d;
1082
1083 vc->vc_font.data = (void *)(p->fontdata =
1084 fvc->vc_font.data);
1085 vc->vc_font.width = fvc->vc_font.width;
1086 vc->vc_font.height = fvc->vc_font.height;
1087 p->userfont = t->userfont;
1088
1089 if (p->userfont)
1090 REFCOUNT(p->fontdata)++;
1091 } else {
1092 const struct font_desc *font = NULL;
1093
1094 if (!fontname[0] || !(font = find_font(fontname)))
1095 font = get_default_font(info->var.xres,
1096 info->var.yres,
1097 info->pixmap.blit_x,
1098 info->pixmap.blit_y);
1099 vc->vc_font.width = font->width;
1100 vc->vc_font.height = font->height;
1101 vc->vc_font.data = (void *)(p->fontdata = font->data);
1102 vc->vc_font.charcount = 256; /* FIXME Need to
1103 support more fonts */
1104 }
1105 }
1106
1107 if (p->userfont)
1108 charcnt = FNTCHARCNT(p->fontdata);
1109
1110 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1111 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1112 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1113 if (charcnt == 256) {
1114 vc->vc_hi_font_mask = 0;
1115 } else {
1116 vc->vc_hi_font_mask = 0x100;
1117 if (vc->vc_can_do_color)
1118 vc->vc_complement_mask <<= 1;
1119 }
1120
1121 if (!*svc->vc_uni_pagedir_loc)
1122 con_set_default_unimap(svc);
1123 if (!*vc->vc_uni_pagedir_loc)
1124 con_copy_unimap(vc, svc);
1125
1126 ops = info->fbcon_par;
1127 p->con_rotate = initial_rotation;
1128 set_blitting_type(vc, info);
1129
1130 cols = vc->vc_cols;
1131 rows = vc->vc_rows;
1132 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1133 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1134 new_cols /= vc->vc_font.width;
1135 new_rows /= vc->vc_font.height;
1136
1137 /*
1138 * We must always set the mode. The mode of the previous console
1139 * driver could be in the same resolution but we are using different
1140 * hardware so we have to initialize the hardware.
1141 *
1142 * We need to do it in fbcon_init() to prevent screen corruption.
1143 */
1144 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1145 if (info->fbops->fb_set_par &&
1146 !(ops->flags & FBCON_FLAGS_INIT)) {
1147 ret = info->fbops->fb_set_par(info);
1148
1149 if (ret)
1150 printk(KERN_ERR "fbcon_init: detected "
1151 "unhandled fb_set_par error, "
1152 "error code %d\n", ret);
1153 }
1154
1155 ops->flags |= FBCON_FLAGS_INIT;
1156 }
1157
1158 ops->graphics = 0;
1159
1160 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1161 !(cap & FBINFO_HWACCEL_DISABLED))
1162 p->scrollmode = SCROLL_MOVE;
1163 else /* default to something safe */
1164 p->scrollmode = SCROLL_REDRAW;
1165
1166 /*
1167 * ++guenther: console.c:vc_allocate() relies on initializing
1168 * vc_{cols,rows}, but we must not set those if we are only
1169 * resizing the console.
1170 */
1171 if (init) {
1172 vc->vc_cols = new_cols;
1173 vc->vc_rows = new_rows;
1174 } else
1175 vc_resize(vc, new_cols, new_rows);
1176
1177 if (logo)
1178 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1179
1180 if (vc == svc && softback_buf)
1181 fbcon_update_softback(vc);
1182
1183 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1184 ops->rotate = FB_ROTATE_UR;
1185 set_blitting_type(vc, info);
1186 }
1187
1188 ops->p = &fb_display[fg_console];
1189 }
1190
1191 static void fbcon_free_font(struct display *p, bool freefont)
1192 {
1193 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1194 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1195 p->fontdata = NULL;
1196 p->userfont = 0;
1197 }
1198
1199 static void fbcon_deinit(struct vc_data *vc)
1200 {
1201 struct display *p = &fb_display[vc->vc_num];
1202 struct fb_info *info;
1203 struct fbcon_ops *ops;
1204 int idx;
1205 bool free_font = true;
1206
1207 idx = con2fb_map[vc->vc_num];
1208
1209 if (idx == -1)
1210 goto finished;
1211
1212 info = registered_fb[idx];
1213
1214 if (!info)
1215 goto finished;
1216
1217 if (info->flags & FBINFO_MISC_FIRMWARE)
1218 free_font = false;
1219 ops = info->fbcon_par;
1220
1221 if (!ops)
1222 goto finished;
1223
1224 if (CON_IS_VISIBLE(vc))
1225 fbcon_del_cursor_timer(info);
1226
1227 ops->flags &= ~FBCON_FLAGS_INIT;
1228 finished:
1229
1230 fbcon_free_font(p, free_font);
1231 if (free_font)
1232 vc->vc_font.data = NULL;
1233
1234 if (!con_is_bound(&fb_con))
1235 fbcon_exit();
1236
1237 return;
1238 }
1239
1240 /* ====================================================================== */
1241
1242 /* fbcon_XXX routines - interface used by the world
1243 *
1244 * This system is now divided into two levels because of complications
1245 * caused by hardware scrolling. Top level functions:
1246 *
1247 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1248 *
1249 * handles y values in range [0, scr_height-1] that correspond to real
1250 * screen positions. y_wrap shift means that first line of bitmap may be
1251 * anywhere on this display. These functions convert lineoffsets to
1252 * bitmap offsets and deal with the wrap-around case by splitting blits.
1253 *
1254 * fbcon_bmove_physical_8() -- These functions fast implementations
1255 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1256 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1257 *
1258 * WARNING:
1259 *
1260 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1261 * Implies should only really hardware scroll in rows. Only reason for
1262 * restriction is simplicity & efficiency at the moment.
1263 */
1264
1265 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1266 int width)
1267 {
1268 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1269 struct fbcon_ops *ops = info->fbcon_par;
1270
1271 struct display *p = &fb_display[vc->vc_num];
1272 u_int y_break;
1273
1274 if (fbcon_is_inactive(vc, info))
1275 return;
1276
1277 if (!height || !width)
1278 return;
1279
1280 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1281 vc->vc_top = 0;
1282 /*
1283 * If the font dimensions are not an integral of the display
1284 * dimensions then the ops->clear below won't end up clearing
1285 * the margins. Call clear_margins here in case the logo
1286 * bitmap stretched into the margin area.
1287 */
1288 fbcon_clear_margins(vc, 0);
1289 }
1290
1291 /* Split blits that cross physical y_wrap boundary */
1292
1293 y_break = p->vrows - p->yscroll;
1294 if (sy < y_break && sy + height - 1 >= y_break) {
1295 u_int b = y_break - sy;
1296 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1297 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1298 width);
1299 } else
1300 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1301 }
1302
1303 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1304 int count, int ypos, int xpos)
1305 {
1306 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1307 struct display *p = &fb_display[vc->vc_num];
1308 struct fbcon_ops *ops = info->fbcon_par;
1309
1310 if (!fbcon_is_inactive(vc, info))
1311 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1312 get_color(vc, info, scr_readw(s), 1),
1313 get_color(vc, info, scr_readw(s), 0));
1314 }
1315
1316 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1317 {
1318 unsigned short chr;
1319
1320 scr_writew(c, &chr);
1321 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1322 }
1323
1324 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1325 {
1326 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1327 struct fbcon_ops *ops = info->fbcon_par;
1328
1329 if (!fbcon_is_inactive(vc, info))
1330 ops->clear_margins(vc, info, bottom_only);
1331 }
1332
1333 static void fbcon_cursor(struct vc_data *vc, int mode)
1334 {
1335 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1336 struct fbcon_ops *ops = info->fbcon_par;
1337 int y;
1338 int c = scr_readw((u16 *) vc->vc_pos);
1339
1340 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1341 return;
1342
1343 if (vc->vc_cursor_type & 0x10)
1344 fbcon_del_cursor_timer(info);
1345 else
1346 fbcon_add_cursor_timer(info);
1347
1348 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1349 if (mode & CM_SOFTBACK) {
1350 mode &= ~CM_SOFTBACK;
1351 y = softback_lines;
1352 } else {
1353 if (softback_lines)
1354 fbcon_set_origin(vc);
1355 y = 0;
1356 }
1357
1358 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1359 get_color(vc, info, c, 0));
1360 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1361 }
1362
1363 static int scrollback_phys_max = 0;
1364 static int scrollback_max = 0;
1365 static int scrollback_current = 0;
1366
1367 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1368 int unit)
1369 {
1370 struct display *p, *t;
1371 struct vc_data **default_mode, *vc;
1372 struct vc_data *svc;
1373 struct fbcon_ops *ops = info->fbcon_par;
1374 int rows, cols, charcnt = 256;
1375
1376 p = &fb_display[unit];
1377
1378 if (var_to_display(p, var, info))
1379 return;
1380
1381 vc = vc_cons[unit].d;
1382
1383 if (!vc)
1384 return;
1385
1386 default_mode = vc->vc_display_fg;
1387 svc = *default_mode;
1388 t = &fb_display[svc->vc_num];
1389
1390 if (!vc->vc_font.data) {
1391 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1392 vc->vc_font.width = (*default_mode)->vc_font.width;
1393 vc->vc_font.height = (*default_mode)->vc_font.height;
1394 p->userfont = t->userfont;
1395 if (p->userfont)
1396 REFCOUNT(p->fontdata)++;
1397 }
1398 if (p->userfont)
1399 charcnt = FNTCHARCNT(p->fontdata);
1400
1401 var->activate = FB_ACTIVATE_NOW;
1402 info->var.activate = var->activate;
1403 var->yoffset = info->var.yoffset;
1404 var->xoffset = info->var.xoffset;
1405 fb_set_var(info, var);
1406 ops->var = info->var;
1407 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1408 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1409 if (charcnt == 256) {
1410 vc->vc_hi_font_mask = 0;
1411 } else {
1412 vc->vc_hi_font_mask = 0x100;
1413 if (vc->vc_can_do_color)
1414 vc->vc_complement_mask <<= 1;
1415 }
1416
1417 if (!*svc->vc_uni_pagedir_loc)
1418 con_set_default_unimap(svc);
1419 if (!*vc->vc_uni_pagedir_loc)
1420 con_copy_unimap(vc, svc);
1421
1422 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1423 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1424 cols /= vc->vc_font.width;
1425 rows /= vc->vc_font.height;
1426 vc_resize(vc, cols, rows);
1427
1428 if (CON_IS_VISIBLE(vc)) {
1429 update_screen(vc);
1430 if (softback_buf)
1431 fbcon_update_softback(vc);
1432 }
1433 }
1434
1435 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1436 {
1437 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1438 struct fbcon_ops *ops = info->fbcon_par;
1439 struct display *p = &fb_display[vc->vc_num];
1440
1441 p->yscroll += count;
1442 if (p->yscroll >= p->vrows) /* Deal with wrap */
1443 p->yscroll -= p->vrows;
1444 ops->var.xoffset = 0;
1445 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1446 ops->var.vmode |= FB_VMODE_YWRAP;
1447 ops->update_start(info);
1448 scrollback_max += count;
1449 if (scrollback_max > scrollback_phys_max)
1450 scrollback_max = scrollback_phys_max;
1451 scrollback_current = 0;
1452 }
1453
1454 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1455 {
1456 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1457 struct fbcon_ops *ops = info->fbcon_par;
1458 struct display *p = &fb_display[vc->vc_num];
1459
1460 p->yscroll -= count;
1461 if (p->yscroll < 0) /* Deal with wrap */
1462 p->yscroll += p->vrows;
1463 ops->var.xoffset = 0;
1464 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1465 ops->var.vmode |= FB_VMODE_YWRAP;
1466 ops->update_start(info);
1467 scrollback_max -= count;
1468 if (scrollback_max < 0)
1469 scrollback_max = 0;
1470 scrollback_current = 0;
1471 }
1472
1473 static __inline__ void ypan_up(struct vc_data *vc, int count)
1474 {
1475 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1476 struct display *p = &fb_display[vc->vc_num];
1477 struct fbcon_ops *ops = info->fbcon_par;
1478
1479 p->yscroll += count;
1480 if (p->yscroll > p->vrows - vc->vc_rows) {
1481 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1482 0, 0, 0, vc->vc_rows, vc->vc_cols);
1483 p->yscroll -= p->vrows - vc->vc_rows;
1484 }
1485
1486 ops->var.xoffset = 0;
1487 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1488 ops->var.vmode &= ~FB_VMODE_YWRAP;
1489 ops->update_start(info);
1490 fbcon_clear_margins(vc, 1);
1491 scrollback_max += count;
1492 if (scrollback_max > scrollback_phys_max)
1493 scrollback_max = scrollback_phys_max;
1494 scrollback_current = 0;
1495 }
1496
1497 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1498 {
1499 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1500 struct fbcon_ops *ops = info->fbcon_par;
1501 struct display *p = &fb_display[vc->vc_num];
1502
1503 p->yscroll += count;
1504
1505 if (p->yscroll > p->vrows - vc->vc_rows) {
1506 p->yscroll -= p->vrows - vc->vc_rows;
1507 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1508 }
1509
1510 ops->var.xoffset = 0;
1511 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1512 ops->var.vmode &= ~FB_VMODE_YWRAP;
1513 ops->update_start(info);
1514 fbcon_clear_margins(vc, 1);
1515 scrollback_max += count;
1516 if (scrollback_max > scrollback_phys_max)
1517 scrollback_max = scrollback_phys_max;
1518 scrollback_current = 0;
1519 }
1520
1521 static __inline__ void ypan_down(struct vc_data *vc, int count)
1522 {
1523 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1524 struct display *p = &fb_display[vc->vc_num];
1525 struct fbcon_ops *ops = info->fbcon_par;
1526
1527 p->yscroll -= count;
1528 if (p->yscroll < 0) {
1529 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1530 0, vc->vc_rows, vc->vc_cols);
1531 p->yscroll += p->vrows - vc->vc_rows;
1532 }
1533
1534 ops->var.xoffset = 0;
1535 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1536 ops->var.vmode &= ~FB_VMODE_YWRAP;
1537 ops->update_start(info);
1538 fbcon_clear_margins(vc, 1);
1539 scrollback_max -= count;
1540 if (scrollback_max < 0)
1541 scrollback_max = 0;
1542 scrollback_current = 0;
1543 }
1544
1545 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1546 {
1547 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1548 struct fbcon_ops *ops = info->fbcon_par;
1549 struct display *p = &fb_display[vc->vc_num];
1550
1551 p->yscroll -= count;
1552
1553 if (p->yscroll < 0) {
1554 p->yscroll += p->vrows - vc->vc_rows;
1555 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1556 }
1557
1558 ops->var.xoffset = 0;
1559 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1560 ops->var.vmode &= ~FB_VMODE_YWRAP;
1561 ops->update_start(info);
1562 fbcon_clear_margins(vc, 1);
1563 scrollback_max -= count;
1564 if (scrollback_max < 0)
1565 scrollback_max = 0;
1566 scrollback_current = 0;
1567 }
1568
1569 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1570 long delta)
1571 {
1572 int count = vc->vc_rows;
1573 unsigned short *d, *s;
1574 unsigned long n;
1575 int line = 0;
1576
1577 d = (u16 *) softback_curr;
1578 if (d == (u16 *) softback_in)
1579 d = (u16 *) vc->vc_origin;
1580 n = softback_curr + delta * vc->vc_size_row;
1581 softback_lines -= delta;
1582 if (delta < 0) {
1583 if (softback_curr < softback_top && n < softback_buf) {
1584 n += softback_end - softback_buf;
1585 if (n < softback_top) {
1586 softback_lines -=
1587 (softback_top - n) / vc->vc_size_row;
1588 n = softback_top;
1589 }
1590 } else if (softback_curr >= softback_top
1591 && n < softback_top) {
1592 softback_lines -=
1593 (softback_top - n) / vc->vc_size_row;
1594 n = softback_top;
1595 }
1596 } else {
1597 if (softback_curr > softback_in && n >= softback_end) {
1598 n += softback_buf - softback_end;
1599 if (n > softback_in) {
1600 n = softback_in;
1601 softback_lines = 0;
1602 }
1603 } else if (softback_curr <= softback_in && n > softback_in) {
1604 n = softback_in;
1605 softback_lines = 0;
1606 }
1607 }
1608 if (n == softback_curr)
1609 return;
1610 softback_curr = n;
1611 s = (u16 *) softback_curr;
1612 if (s == (u16 *) softback_in)
1613 s = (u16 *) vc->vc_origin;
1614 while (count--) {
1615 unsigned short *start;
1616 unsigned short *le;
1617 unsigned short c;
1618 int x = 0;
1619 unsigned short attr = 1;
1620
1621 start = s;
1622 le = advance_row(s, 1);
1623 do {
1624 c = scr_readw(s);
1625 if (attr != (c & 0xff00)) {
1626 attr = c & 0xff00;
1627 if (s > start) {
1628 fbcon_putcs(vc, start, s - start,
1629 line, x);
1630 x += s - start;
1631 start = s;
1632 }
1633 }
1634 if (c == scr_readw(d)) {
1635 if (s > start) {
1636 fbcon_putcs(vc, start, s - start,
1637 line, x);
1638 x += s - start + 1;
1639 start = s + 1;
1640 } else {
1641 x++;
1642 start++;
1643 }
1644 }
1645 s++;
1646 d++;
1647 } while (s < le);
1648 if (s > start)
1649 fbcon_putcs(vc, start, s - start, line, x);
1650 line++;
1651 if (d == (u16 *) softback_end)
1652 d = (u16 *) softback_buf;
1653 if (d == (u16 *) softback_in)
1654 d = (u16 *) vc->vc_origin;
1655 if (s == (u16 *) softback_end)
1656 s = (u16 *) softback_buf;
1657 if (s == (u16 *) softback_in)
1658 s = (u16 *) vc->vc_origin;
1659 }
1660 }
1661
1662 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1663 int line, int count, int dy)
1664 {
1665 unsigned short *s = (unsigned short *)
1666 (vc->vc_origin + vc->vc_size_row * line);
1667
1668 while (count--) {
1669 unsigned short *start = s;
1670 unsigned short *le = advance_row(s, 1);
1671 unsigned short c;
1672 int x = 0;
1673 unsigned short attr = 1;
1674
1675 do {
1676 c = scr_readw(s);
1677 if (attr != (c & 0xff00)) {
1678 attr = c & 0xff00;
1679 if (s > start) {
1680 fbcon_putcs(vc, start, s - start,
1681 dy, x);
1682 x += s - start;
1683 start = s;
1684 }
1685 }
1686 console_conditional_schedule();
1687 s++;
1688 } while (s < le);
1689 if (s > start)
1690 fbcon_putcs(vc, start, s - start, dy, x);
1691 console_conditional_schedule();
1692 dy++;
1693 }
1694 }
1695
1696 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1697 struct display *p, int line, int count, int ycount)
1698 {
1699 int offset = ycount * vc->vc_cols;
1700 unsigned short *d = (unsigned short *)
1701 (vc->vc_origin + vc->vc_size_row * line);
1702 unsigned short *s = d + offset;
1703 struct fbcon_ops *ops = info->fbcon_par;
1704
1705 while (count--) {
1706 unsigned short *start = s;
1707 unsigned short *le = advance_row(s, 1);
1708 unsigned short c;
1709 int x = 0;
1710
1711 do {
1712 c = scr_readw(s);
1713
1714 if (c == scr_readw(d)) {
1715 if (s > start) {
1716 ops->bmove(vc, info, line + ycount, x,
1717 line, x, 1, s-start);
1718 x += s - start + 1;
1719 start = s + 1;
1720 } else {
1721 x++;
1722 start++;
1723 }
1724 }
1725
1726 scr_writew(c, d);
1727 console_conditional_schedule();
1728 s++;
1729 d++;
1730 } while (s < le);
1731 if (s > start)
1732 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1733 s-start);
1734 console_conditional_schedule();
1735 if (ycount > 0)
1736 line++;
1737 else {
1738 line--;
1739 /* NOTE: We subtract two lines from these pointers */
1740 s -= vc->vc_size_row;
1741 d -= vc->vc_size_row;
1742 }
1743 }
1744 }
1745
1746 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1747 int line, int count, int offset)
1748 {
1749 unsigned short *d = (unsigned short *)
1750 (vc->vc_origin + vc->vc_size_row * line);
1751 unsigned short *s = d + offset;
1752
1753 while (count--) {
1754 unsigned short *start = s;
1755 unsigned short *le = advance_row(s, 1);
1756 unsigned short c;
1757 int x = 0;
1758 unsigned short attr = 1;
1759
1760 do {
1761 c = scr_readw(s);
1762 if (attr != (c & 0xff00)) {
1763 attr = c & 0xff00;
1764 if (s > start) {
1765 fbcon_putcs(vc, start, s - start,
1766 line, x);
1767 x += s - start;
1768 start = s;
1769 }
1770 }
1771 if (c == scr_readw(d)) {
1772 if (s > start) {
1773 fbcon_putcs(vc, start, s - start,
1774 line, x);
1775 x += s - start + 1;
1776 start = s + 1;
1777 } else {
1778 x++;
1779 start++;
1780 }
1781 }
1782 scr_writew(c, d);
1783 console_conditional_schedule();
1784 s++;
1785 d++;
1786 } while (s < le);
1787 if (s > start)
1788 fbcon_putcs(vc, start, s - start, line, x);
1789 console_conditional_schedule();
1790 if (offset > 0)
1791 line++;
1792 else {
1793 line--;
1794 /* NOTE: We subtract two lines from these pointers */
1795 s -= vc->vc_size_row;
1796 d -= vc->vc_size_row;
1797 }
1798 }
1799 }
1800
1801 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1802 int count)
1803 {
1804 unsigned short *p;
1805
1806 if (vc->vc_num != fg_console)
1807 return;
1808 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1809
1810 while (count) {
1811 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1812 count--;
1813 p = advance_row(p, 1);
1814 softback_in += vc->vc_size_row;
1815 if (softback_in == softback_end)
1816 softback_in = softback_buf;
1817 if (softback_in == softback_top) {
1818 softback_top += vc->vc_size_row;
1819 if (softback_top == softback_end)
1820 softback_top = softback_buf;
1821 }
1822 }
1823 softback_curr = softback_in;
1824 }
1825
1826 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1827 int count)
1828 {
1829 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1830 struct display *p = &fb_display[vc->vc_num];
1831 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1832
1833 if (fbcon_is_inactive(vc, info))
1834 return -EINVAL;
1835
1836 fbcon_cursor(vc, CM_ERASE);
1837
1838 /*
1839 * ++Geert: Only use ywrap/ypan if the console is in text mode
1840 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1841 * whole screen (prevents flicker).
1842 */
1843
1844 switch (dir) {
1845 case SM_UP:
1846 if (count > vc->vc_rows) /* Maximum realistic size */
1847 count = vc->vc_rows;
1848 if (softback_top)
1849 fbcon_softback_note(vc, t, count);
1850 if (logo_shown >= 0)
1851 goto redraw_up;
1852 switch (p->scrollmode) {
1853 case SCROLL_MOVE:
1854 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1855 count);
1856 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1857 scr_memsetw((unsigned short *) (vc->vc_origin +
1858 vc->vc_size_row *
1859 (b - count)),
1860 vc->vc_video_erase_char,
1861 vc->vc_size_row * count);
1862 return 1;
1863 break;
1864
1865 case SCROLL_WRAP_MOVE:
1866 if (b - t - count > 3 * vc->vc_rows >> 2) {
1867 if (t > 0)
1868 fbcon_bmove(vc, 0, 0, count, 0, t,
1869 vc->vc_cols);
1870 ywrap_up(vc, count);
1871 if (vc->vc_rows - b > 0)
1872 fbcon_bmove(vc, b - count, 0, b, 0,
1873 vc->vc_rows - b,
1874 vc->vc_cols);
1875 } else if (info->flags & FBINFO_READS_FAST)
1876 fbcon_bmove(vc, t + count, 0, t, 0,
1877 b - t - count, vc->vc_cols);
1878 else
1879 goto redraw_up;
1880 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1881 break;
1882
1883 case SCROLL_PAN_REDRAW:
1884 if ((p->yscroll + count <=
1885 2 * (p->vrows - vc->vc_rows))
1886 && ((!scroll_partial && (b - t == vc->vc_rows))
1887 || (scroll_partial
1888 && (b - t - count >
1889 3 * vc->vc_rows >> 2)))) {
1890 if (t > 0)
1891 fbcon_redraw_move(vc, p, 0, t, count);
1892 ypan_up_redraw(vc, t, count);
1893 if (vc->vc_rows - b > 0)
1894 fbcon_redraw_move(vc, p, b,
1895 vc->vc_rows - b, b);
1896 } else
1897 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1898 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1899 break;
1900
1901 case SCROLL_PAN_MOVE:
1902 if ((p->yscroll + count <=
1903 2 * (p->vrows - vc->vc_rows))
1904 && ((!scroll_partial && (b - t == vc->vc_rows))
1905 || (scroll_partial
1906 && (b - t - count >
1907 3 * vc->vc_rows >> 2)))) {
1908 if (t > 0)
1909 fbcon_bmove(vc, 0, 0, count, 0, t,
1910 vc->vc_cols);
1911 ypan_up(vc, count);
1912 if (vc->vc_rows - b > 0)
1913 fbcon_bmove(vc, b - count, 0, b, 0,
1914 vc->vc_rows - b,
1915 vc->vc_cols);
1916 } else if (info->flags & FBINFO_READS_FAST)
1917 fbcon_bmove(vc, t + count, 0, t, 0,
1918 b - t - count, vc->vc_cols);
1919 else
1920 goto redraw_up;
1921 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1922 break;
1923
1924 case SCROLL_REDRAW:
1925 redraw_up:
1926 fbcon_redraw(vc, p, t, b - t - count,
1927 count * vc->vc_cols);
1928 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1929 scr_memsetw((unsigned short *) (vc->vc_origin +
1930 vc->vc_size_row *
1931 (b - count)),
1932 vc->vc_video_erase_char,
1933 vc->vc_size_row * count);
1934 return 1;
1935 }
1936 break;
1937
1938 case SM_DOWN:
1939 if (count > vc->vc_rows) /* Maximum realistic size */
1940 count = vc->vc_rows;
1941 if (logo_shown >= 0)
1942 goto redraw_down;
1943 switch (p->scrollmode) {
1944 case SCROLL_MOVE:
1945 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1946 -count);
1947 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1948 scr_memsetw((unsigned short *) (vc->vc_origin +
1949 vc->vc_size_row *
1950 t),
1951 vc->vc_video_erase_char,
1952 vc->vc_size_row * count);
1953 return 1;
1954 break;
1955
1956 case SCROLL_WRAP_MOVE:
1957 if (b - t - count > 3 * vc->vc_rows >> 2) {
1958 if (vc->vc_rows - b > 0)
1959 fbcon_bmove(vc, b, 0, b - count, 0,
1960 vc->vc_rows - b,
1961 vc->vc_cols);
1962 ywrap_down(vc, count);
1963 if (t > 0)
1964 fbcon_bmove(vc, count, 0, 0, 0, t,
1965 vc->vc_cols);
1966 } else if (info->flags & FBINFO_READS_FAST)
1967 fbcon_bmove(vc, t, 0, t + count, 0,
1968 b - t - count, vc->vc_cols);
1969 else
1970 goto redraw_down;
1971 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1972 break;
1973
1974 case SCROLL_PAN_MOVE:
1975 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1976 && ((!scroll_partial && (b - t == vc->vc_rows))
1977 || (scroll_partial
1978 && (b - t - count >
1979 3 * vc->vc_rows >> 2)))) {
1980 if (vc->vc_rows - b > 0)
1981 fbcon_bmove(vc, b, 0, b - count, 0,
1982 vc->vc_rows - b,
1983 vc->vc_cols);
1984 ypan_down(vc, count);
1985 if (t > 0)
1986 fbcon_bmove(vc, count, 0, 0, 0, t,
1987 vc->vc_cols);
1988 } else if (info->flags & FBINFO_READS_FAST)
1989 fbcon_bmove(vc, t, 0, t + count, 0,
1990 b - t - count, vc->vc_cols);
1991 else
1992 goto redraw_down;
1993 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1994 break;
1995
1996 case SCROLL_PAN_REDRAW:
1997 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1998 && ((!scroll_partial && (b - t == vc->vc_rows))
1999 || (scroll_partial
2000 && (b - t - count >
2001 3 * vc->vc_rows >> 2)))) {
2002 if (vc->vc_rows - b > 0)
2003 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2004 b - count);
2005 ypan_down_redraw(vc, t, count);
2006 if (t > 0)
2007 fbcon_redraw_move(vc, p, count, t, 0);
2008 } else
2009 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2010 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2011 break;
2012
2013 case SCROLL_REDRAW:
2014 redraw_down:
2015 fbcon_redraw(vc, p, b - 1, b - t - count,
2016 -count * vc->vc_cols);
2017 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2018 scr_memsetw((unsigned short *) (vc->vc_origin +
2019 vc->vc_size_row *
2020 t),
2021 vc->vc_video_erase_char,
2022 vc->vc_size_row * count);
2023 return 1;
2024 }
2025 }
2026 return 0;
2027 }
2028
2029
2030 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2031 int height, int width)
2032 {
2033 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2034 struct display *p = &fb_display[vc->vc_num];
2035
2036 if (fbcon_is_inactive(vc, info))
2037 return;
2038
2039 if (!width || !height)
2040 return;
2041
2042 /* Split blits that cross physical y_wrap case.
2043 * Pathological case involves 4 blits, better to use recursive
2044 * code rather than unrolled case
2045 *
2046 * Recursive invocations don't need to erase the cursor over and
2047 * over again, so we use fbcon_bmove_rec()
2048 */
2049 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2050 p->vrows - p->yscroll);
2051 }
2052
2053 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2054 int dy, int dx, int height, int width, u_int y_break)
2055 {
2056 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2057 struct fbcon_ops *ops = info->fbcon_par;
2058 u_int b;
2059
2060 if (sy < y_break && sy + height > y_break) {
2061 b = y_break - sy;
2062 if (dy < sy) { /* Avoid trashing self */
2063 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2064 y_break);
2065 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2066 height - b, width, y_break);
2067 } else {
2068 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2069 height - b, width, y_break);
2070 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2071 y_break);
2072 }
2073 return;
2074 }
2075
2076 if (dy < y_break && dy + height > y_break) {
2077 b = y_break - dy;
2078 if (dy < sy) { /* Avoid trashing self */
2079 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2080 y_break);
2081 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2082 height - b, width, y_break);
2083 } else {
2084 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2085 height - b, width, y_break);
2086 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2087 y_break);
2088 }
2089 return;
2090 }
2091 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2092 height, width);
2093 }
2094
2095 static void updatescrollmode(struct display *p,
2096 struct fb_info *info,
2097 struct vc_data *vc)
2098 {
2099 struct fbcon_ops *ops = info->fbcon_par;
2100 int fh = vc->vc_font.height;
2101 int cap = info->flags;
2102 u16 t = 0;
2103 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2104 info->fix.xpanstep);
2105 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2106 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2107 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2108 info->var.xres_virtual);
2109 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2110 divides(ypan, vc->vc_font.height) && vyres > yres;
2111 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2112 divides(ywrap, vc->vc_font.height) &&
2113 divides(vc->vc_font.height, vyres) &&
2114 divides(vc->vc_font.height, yres);
2115 int reading_fast = cap & FBINFO_READS_FAST;
2116 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2117 !(cap & FBINFO_HWACCEL_DISABLED);
2118 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2119 !(cap & FBINFO_HWACCEL_DISABLED);
2120
2121 p->vrows = vyres/fh;
2122 if (yres > (fh * (vc->vc_rows + 1)))
2123 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2124 if ((yres % fh) && (vyres % fh < yres % fh))
2125 p->vrows--;
2126
2127 if (good_wrap || good_pan) {
2128 if (reading_fast || fast_copyarea)
2129 p->scrollmode = good_wrap ?
2130 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2131 else
2132 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2133 SCROLL_PAN_REDRAW;
2134 } else {
2135 if (reading_fast || (fast_copyarea && !fast_imageblit))
2136 p->scrollmode = SCROLL_MOVE;
2137 else
2138 p->scrollmode = SCROLL_REDRAW;
2139 }
2140 }
2141
2142 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2143 unsigned int height, unsigned int user)
2144 {
2145 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2146 struct fbcon_ops *ops = info->fbcon_par;
2147 struct display *p = &fb_display[vc->vc_num];
2148 struct fb_var_screeninfo var = info->var;
2149 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2150
2151 virt_w = FBCON_SWAP(ops->rotate, width, height);
2152 virt_h = FBCON_SWAP(ops->rotate, height, width);
2153 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2154 vc->vc_font.height);
2155 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2156 vc->vc_font.width);
2157 var.xres = virt_w * virt_fw;
2158 var.yres = virt_h * virt_fh;
2159 x_diff = info->var.xres - var.xres;
2160 y_diff = info->var.yres - var.yres;
2161 if (x_diff < 0 || x_diff > virt_fw ||
2162 y_diff < 0 || y_diff > virt_fh) {
2163 const struct fb_videomode *mode;
2164
2165 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2166 mode = fb_find_best_mode(&var, &info->modelist);
2167 if (mode == NULL)
2168 return -EINVAL;
2169 display_to_var(&var, p);
2170 fb_videomode_to_var(&var, mode);
2171
2172 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2173 return -EINVAL;
2174
2175 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2176 if (CON_IS_VISIBLE(vc)) {
2177 var.activate = FB_ACTIVATE_NOW |
2178 FB_ACTIVATE_FORCE;
2179 fb_set_var(info, &var);
2180 }
2181 var_to_display(p, &info->var, info);
2182 ops->var = info->var;
2183 }
2184 updatescrollmode(p, info, vc);
2185 return 0;
2186 }
2187
2188 static int fbcon_switch(struct vc_data *vc)
2189 {
2190 struct fb_info *info, *old_info = NULL;
2191 struct fbcon_ops *ops;
2192 struct display *p = &fb_display[vc->vc_num];
2193 struct fb_var_screeninfo var;
2194 int i, ret, prev_console, charcnt = 256;
2195
2196 info = registered_fb[con2fb_map[vc->vc_num]];
2197 ops = info->fbcon_par;
2198
2199 if (softback_top) {
2200 if (softback_lines)
2201 fbcon_set_origin(vc);
2202 softback_top = softback_curr = softback_in = softback_buf;
2203 softback_lines = 0;
2204 fbcon_update_softback(vc);
2205 }
2206
2207 if (logo_shown >= 0) {
2208 struct vc_data *conp2 = vc_cons[logo_shown].d;
2209
2210 if (conp2->vc_top == logo_lines
2211 && conp2->vc_bottom == conp2->vc_rows)
2212 conp2->vc_top = 0;
2213 logo_shown = FBCON_LOGO_CANSHOW;
2214 }
2215
2216 prev_console = ops->currcon;
2217 if (prev_console != -1)
2218 old_info = registered_fb[con2fb_map[prev_console]];
2219 /*
2220 * FIXME: If we have multiple fbdev's loaded, we need to
2221 * update all info->currcon. Perhaps, we can place this
2222 * in a centralized structure, but this might break some
2223 * drivers.
2224 *
2225 * info->currcon = vc->vc_num;
2226 */
2227 for (i = 0; i < FB_MAX; i++) {
2228 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2229 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2230
2231 o->currcon = vc->vc_num;
2232 }
2233 }
2234 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2235 display_to_var(&var, p);
2236 var.activate = FB_ACTIVATE_NOW;
2237
2238 /*
2239 * make sure we don't unnecessarily trip the memcmp()
2240 * in fb_set_var()
2241 */
2242 info->var.activate = var.activate;
2243 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2244 fb_set_var(info, &var);
2245 ops->var = info->var;
2246
2247 if (old_info != NULL && (old_info != info ||
2248 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2249 if (info->fbops->fb_set_par) {
2250 ret = info->fbops->fb_set_par(info);
2251
2252 if (ret)
2253 printk(KERN_ERR "fbcon_switch: detected "
2254 "unhandled fb_set_par error, "
2255 "error code %d\n", ret);
2256 }
2257
2258 if (old_info != info)
2259 fbcon_del_cursor_timer(old_info);
2260 }
2261
2262 if (fbcon_is_inactive(vc, info) ||
2263 ops->blank_state != FB_BLANK_UNBLANK)
2264 fbcon_del_cursor_timer(info);
2265 else
2266 fbcon_add_cursor_timer(info);
2267
2268 set_blitting_type(vc, info);
2269 ops->cursor_reset = 1;
2270
2271 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2272 ops->rotate = FB_ROTATE_UR;
2273 set_blitting_type(vc, info);
2274 }
2275
2276 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2277 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2278
2279 if (p->userfont)
2280 charcnt = FNTCHARCNT(vc->vc_font.data);
2281
2282 if (charcnt > 256)
2283 vc->vc_complement_mask <<= 1;
2284
2285 updatescrollmode(p, info, vc);
2286
2287 switch (p->scrollmode) {
2288 case SCROLL_WRAP_MOVE:
2289 scrollback_phys_max = p->vrows - vc->vc_rows;
2290 break;
2291 case SCROLL_PAN_MOVE:
2292 case SCROLL_PAN_REDRAW:
2293 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2294 if (scrollback_phys_max < 0)
2295 scrollback_phys_max = 0;
2296 break;
2297 default:
2298 scrollback_phys_max = 0;
2299 break;
2300 }
2301
2302 scrollback_max = 0;
2303 scrollback_current = 0;
2304
2305 if (!fbcon_is_inactive(vc, info)) {
2306 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2307 ops->update_start(info);
2308 }
2309
2310 fbcon_set_palette(vc, color_table);
2311 fbcon_clear_margins(vc, 0);
2312
2313 if (logo_shown == FBCON_LOGO_DRAW) {
2314
2315 logo_shown = fg_console;
2316 /* This is protected above by initmem_freed */
2317 fb_show_logo(info, ops->rotate);
2318 update_region(vc,
2319 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2320 vc->vc_size_row * (vc->vc_bottom -
2321 vc->vc_top) / 2);
2322 return 0;
2323 }
2324 return 1;
2325 }
2326
2327 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2328 int blank)
2329 {
2330 struct fb_event event;
2331
2332 if (blank) {
2333 unsigned short charmask = vc->vc_hi_font_mask ?
2334 0x1ff : 0xff;
2335 unsigned short oldc;
2336
2337 oldc = vc->vc_video_erase_char;
2338 vc->vc_video_erase_char &= charmask;
2339 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2340 vc->vc_video_erase_char = oldc;
2341 }
2342
2343
2344 if (!lock_fb_info(info))
2345 return;
2346 event.info = info;
2347 event.data = &blank;
2348 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2349 unlock_fb_info(info);
2350 }
2351
2352 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2353 {
2354 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2355 struct fbcon_ops *ops = info->fbcon_par;
2356
2357 if (mode_switch) {
2358 struct fb_var_screeninfo var = info->var;
2359
2360 ops->graphics = 1;
2361
2362 if (!blank) {
2363 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2364 fb_set_var(info, &var);
2365 ops->graphics = 0;
2366 ops->var = info->var;
2367 }
2368 }
2369
2370 if (!fbcon_is_inactive(vc, info)) {
2371 if (ops->blank_state != blank) {
2372 ops->blank_state = blank;
2373 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2374 ops->cursor_flash = (!blank);
2375
2376 if (!(info->flags & FBINFO_MISC_USEREVENT))
2377 if (fb_blank(info, blank))
2378 fbcon_generic_blank(vc, info, blank);
2379 }
2380
2381 if (!blank)
2382 update_screen(vc);
2383 }
2384
2385 if (mode_switch || fbcon_is_inactive(vc, info) ||
2386 ops->blank_state != FB_BLANK_UNBLANK)
2387 fbcon_del_cursor_timer(info);
2388 else
2389 fbcon_add_cursor_timer(info);
2390
2391 return 0;
2392 }
2393
2394 static int fbcon_debug_enter(struct vc_data *vc)
2395 {
2396 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2397 struct fbcon_ops *ops = info->fbcon_par;
2398
2399 ops->save_graphics = ops->graphics;
2400 ops->graphics = 0;
2401 if (info->fbops->fb_debug_enter)
2402 info->fbops->fb_debug_enter(info);
2403 fbcon_set_palette(vc, color_table);
2404 return 0;
2405 }
2406
2407 static int fbcon_debug_leave(struct vc_data *vc)
2408 {
2409 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2410 struct fbcon_ops *ops = info->fbcon_par;
2411
2412 ops->graphics = ops->save_graphics;
2413 if (info->fbops->fb_debug_leave)
2414 info->fbops->fb_debug_leave(info);
2415 return 0;
2416 }
2417
2418 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2419 {
2420 u8 *fontdata = vc->vc_font.data;
2421 u8 *data = font->data;
2422 int i, j;
2423
2424 font->width = vc->vc_font.width;
2425 font->height = vc->vc_font.height;
2426 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2427 if (!font->data)
2428 return 0;
2429
2430 if (font->width <= 8) {
2431 j = vc->vc_font.height;
2432 for (i = 0; i < font->charcount; i++) {
2433 memcpy(data, fontdata, j);
2434 memset(data + j, 0, 32 - j);
2435 data += 32;
2436 fontdata += j;
2437 }
2438 } else if (font->width <= 16) {
2439 j = vc->vc_font.height * 2;
2440 for (i = 0; i < font->charcount; i++) {
2441 memcpy(data, fontdata, j);
2442 memset(data + j, 0, 64 - j);
2443 data += 64;
2444 fontdata += j;
2445 }
2446 } else if (font->width <= 24) {
2447 for (i = 0; i < font->charcount; i++) {
2448 for (j = 0; j < vc->vc_font.height; j++) {
2449 *data++ = fontdata[0];
2450 *data++ = fontdata[1];
2451 *data++ = fontdata[2];
2452 fontdata += sizeof(u32);
2453 }
2454 memset(data, 0, 3 * (32 - j));
2455 data += 3 * (32 - j);
2456 }
2457 } else {
2458 j = vc->vc_font.height * 4;
2459 for (i = 0; i < font->charcount; i++) {
2460 memcpy(data, fontdata, j);
2461 memset(data + j, 0, 128 - j);
2462 data += 128;
2463 fontdata += j;
2464 }
2465 }
2466 return 0;
2467 }
2468
2469 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2470 const u8 * data, int userfont)
2471 {
2472 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2473 struct fbcon_ops *ops = info->fbcon_par;
2474 struct display *p = &fb_display[vc->vc_num];
2475 int resize;
2476 int cnt;
2477 char *old_data = NULL;
2478
2479 if (CON_IS_VISIBLE(vc) && softback_lines)
2480 fbcon_set_origin(vc);
2481
2482 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2483 if (p->userfont)
2484 old_data = vc->vc_font.data;
2485 if (userfont)
2486 cnt = FNTCHARCNT(data);
2487 else
2488 cnt = 256;
2489 vc->vc_font.data = (void *)(p->fontdata = data);
2490 if ((p->userfont = userfont))
2491 REFCOUNT(data)++;
2492 vc->vc_font.width = w;
2493 vc->vc_font.height = h;
2494 if (vc->vc_hi_font_mask && cnt == 256) {
2495 vc->vc_hi_font_mask = 0;
2496 if (vc->vc_can_do_color) {
2497 vc->vc_complement_mask >>= 1;
2498 vc->vc_s_complement_mask >>= 1;
2499 }
2500
2501 /* ++Edmund: reorder the attribute bits */
2502 if (vc->vc_can_do_color) {
2503 unsigned short *cp =
2504 (unsigned short *) vc->vc_origin;
2505 int count = vc->vc_screenbuf_size / 2;
2506 unsigned short c;
2507 for (; count > 0; count--, cp++) {
2508 c = scr_readw(cp);
2509 scr_writew(((c & 0xfe00) >> 1) |
2510 (c & 0xff), cp);
2511 }
2512 c = vc->vc_video_erase_char;
2513 vc->vc_video_erase_char =
2514 ((c & 0xfe00) >> 1) | (c & 0xff);
2515 vc->vc_attr >>= 1;
2516 }
2517 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2518 vc->vc_hi_font_mask = 0x100;
2519 if (vc->vc_can_do_color) {
2520 vc->vc_complement_mask <<= 1;
2521 vc->vc_s_complement_mask <<= 1;
2522 }
2523
2524 /* ++Edmund: reorder the attribute bits */
2525 {
2526 unsigned short *cp =
2527 (unsigned short *) vc->vc_origin;
2528 int count = vc->vc_screenbuf_size / 2;
2529 unsigned short c;
2530 for (; count > 0; count--, cp++) {
2531 unsigned short newc;
2532 c = scr_readw(cp);
2533 if (vc->vc_can_do_color)
2534 newc =
2535 ((c & 0xff00) << 1) | (c &
2536 0xff);
2537 else
2538 newc = c & ~0x100;
2539 scr_writew(newc, cp);
2540 }
2541 c = vc->vc_video_erase_char;
2542 if (vc->vc_can_do_color) {
2543 vc->vc_video_erase_char =
2544 ((c & 0xff00) << 1) | (c & 0xff);
2545 vc->vc_attr <<= 1;
2546 } else
2547 vc->vc_video_erase_char = c & ~0x100;
2548 }
2549
2550 }
2551
2552 if (resize) {
2553 int cols, rows;
2554
2555 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2556 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2557 cols /= w;
2558 rows /= h;
2559 vc_resize(vc, cols, rows);
2560 if (CON_IS_VISIBLE(vc) && softback_buf)
2561 fbcon_update_softback(vc);
2562 } else if (CON_IS_VISIBLE(vc)
2563 && vc->vc_mode == KD_TEXT) {
2564 fbcon_clear_margins(vc, 0);
2565 update_screen(vc);
2566 }
2567
2568 if (old_data && (--REFCOUNT(old_data) == 0))
2569 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2570 return 0;
2571 }
2572
2573 static int fbcon_copy_font(struct vc_data *vc, int con)
2574 {
2575 struct display *od = &fb_display[con];
2576 struct console_font *f = &vc->vc_font;
2577
2578 if (od->fontdata == f->data)
2579 return 0; /* already the same font... */
2580 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2581 }
2582
2583 /*
2584 * User asked to set font; we are guaranteed that
2585 * a) width and height are in range 1..32
2586 * b) charcount does not exceed 512
2587 * but lets not assume that, since someone might someday want to use larger
2588 * fonts. And charcount of 512 is small for unicode support.
2589 *
2590 * However, user space gives the font in 32 rows , regardless of
2591 * actual font height. So a new API is needed if support for larger fonts
2592 * is ever implemented.
2593 */
2594
2595 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2596 {
2597 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2598 unsigned charcount = font->charcount;
2599 int w = font->width;
2600 int h = font->height;
2601 int size;
2602 int i, csum;
2603 u8 *new_data, *data = font->data;
2604 int pitch = (font->width+7) >> 3;
2605
2606 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2607 * If not this check should be changed to charcount < 256 */
2608 if (charcount != 256 && charcount != 512)
2609 return -EINVAL;
2610
2611 /* Make sure drawing engine can handle the font */
2612 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2613 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2614 return -EINVAL;
2615
2616 /* Make sure driver can handle the font length */
2617 if (fbcon_invalid_charcount(info, charcount))
2618 return -EINVAL;
2619
2620 size = h * pitch * charcount;
2621
2622 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2623
2624 if (!new_data)
2625 return -ENOMEM;
2626
2627 new_data += FONT_EXTRA_WORDS * sizeof(int);
2628 FNTSIZE(new_data) = size;
2629 FNTCHARCNT(new_data) = charcount;
2630 REFCOUNT(new_data) = 0; /* usage counter */
2631 for (i=0; i< charcount; i++) {
2632 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2633 }
2634
2635 /* Since linux has a nice crc32 function use it for counting font
2636 * checksums. */
2637 csum = crc32(0, new_data, size);
2638
2639 FNTSUM(new_data) = csum;
2640 /* Check if the same font is on some other console already */
2641 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2642 struct vc_data *tmp = vc_cons[i].d;
2643
2644 if (fb_display[i].userfont &&
2645 fb_display[i].fontdata &&
2646 FNTSUM(fb_display[i].fontdata) == csum &&
2647 FNTSIZE(fb_display[i].fontdata) == size &&
2648 tmp->vc_font.width == w &&
2649 !memcmp(fb_display[i].fontdata, new_data, size)) {
2650 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2651 new_data = (u8 *)fb_display[i].fontdata;
2652 break;
2653 }
2654 }
2655 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2656 }
2657
2658 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2659 {
2660 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2661 const struct font_desc *f;
2662
2663 if (!name)
2664 f = get_default_font(info->var.xres, info->var.yres,
2665 info->pixmap.blit_x, info->pixmap.blit_y);
2666 else if (!(f = find_font(name)))
2667 return -ENOENT;
2668
2669 font->width = f->width;
2670 font->height = f->height;
2671 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2672 }
2673
2674 static u16 palette_red[16];
2675 static u16 palette_green[16];
2676 static u16 palette_blue[16];
2677
2678 static struct fb_cmap palette_cmap = {
2679 0, 16, palette_red, palette_green, palette_blue, NULL
2680 };
2681
2682 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2683 {
2684 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2685 int i, j, k, depth;
2686 u8 val;
2687
2688 if (fbcon_is_inactive(vc, info))
2689 return -EINVAL;
2690
2691 if (!CON_IS_VISIBLE(vc))
2692 return 0;
2693
2694 depth = fb_get_color_depth(&info->var, &info->fix);
2695 if (depth > 3) {
2696 for (i = j = 0; i < 16; i++) {
2697 k = table[i];
2698 val = vc->vc_palette[j++];
2699 palette_red[k] = (val << 8) | val;
2700 val = vc->vc_palette[j++];
2701 palette_green[k] = (val << 8) | val;
2702 val = vc->vc_palette[j++];
2703 palette_blue[k] = (val << 8) | val;
2704 }
2705 palette_cmap.len = 16;
2706 palette_cmap.start = 0;
2707 /*
2708 * If framebuffer is capable of less than 16 colors,
2709 * use default palette of fbcon.
2710 */
2711 } else
2712 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2713
2714 return fb_set_cmap(&palette_cmap, info);
2715 }
2716
2717 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2718 {
2719 unsigned long p;
2720 int line;
2721
2722 if (vc->vc_num != fg_console || !softback_lines)
2723 return (u16 *) (vc->vc_origin + offset);
2724 line = offset / vc->vc_size_row;
2725 if (line >= softback_lines)
2726 return (u16 *) (vc->vc_origin + offset -
2727 softback_lines * vc->vc_size_row);
2728 p = softback_curr + offset;
2729 if (p >= softback_end)
2730 p += softback_buf - softback_end;
2731 return (u16 *) p;
2732 }
2733
2734 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2735 int *px, int *py)
2736 {
2737 unsigned long ret;
2738 int x, y;
2739
2740 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2741 unsigned long offset = (pos - vc->vc_origin) / 2;
2742
2743 x = offset % vc->vc_cols;
2744 y = offset / vc->vc_cols;
2745 if (vc->vc_num == fg_console)
2746 y += softback_lines;
2747 ret = pos + (vc->vc_cols - x) * 2;
2748 } else if (vc->vc_num == fg_console && softback_lines) {
2749 unsigned long offset = pos - softback_curr;
2750
2751 if (pos < softback_curr)
2752 offset += softback_end - softback_buf;
2753 offset /= 2;
2754 x = offset % vc->vc_cols;
2755 y = offset / vc->vc_cols;
2756 ret = pos + (vc->vc_cols - x) * 2;
2757 if (ret == softback_end)
2758 ret = softback_buf;
2759 if (ret == softback_in)
2760 ret = vc->vc_origin;
2761 } else {
2762 /* Should not happen */
2763 x = y = 0;
2764 ret = vc->vc_origin;
2765 }
2766 if (px)
2767 *px = x;
2768 if (py)
2769 *py = y;
2770 return ret;
2771 }
2772
2773 /* As we might be inside of softback, we may work with non-contiguous buffer,
2774 that's why we have to use a separate routine. */
2775 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2776 {
2777 while (cnt--) {
2778 u16 a = scr_readw(p);
2779 if (!vc->vc_can_do_color)
2780 a ^= 0x0800;
2781 else if (vc->vc_hi_font_mask == 0x100)
2782 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2783 (((a) & 0x0e00) << 4);
2784 else
2785 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2786 (((a) & 0x0700) << 4);
2787 scr_writew(a, p++);
2788 if (p == (u16 *) softback_end)
2789 p = (u16 *) softback_buf;
2790 if (p == (u16 *) softback_in)
2791 p = (u16 *) vc->vc_origin;
2792 }
2793 }
2794
2795 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2796 {
2797 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2798 struct fbcon_ops *ops = info->fbcon_par;
2799 struct display *disp = &fb_display[fg_console];
2800 int offset, limit, scrollback_old;
2801
2802 if (softback_top) {
2803 if (vc->vc_num != fg_console)
2804 return 0;
2805 if (vc->vc_mode != KD_TEXT || !lines)
2806 return 0;
2807 if (logo_shown >= 0) {
2808 struct vc_data *conp2 = vc_cons[logo_shown].d;
2809
2810 if (conp2->vc_top == logo_lines
2811 && conp2->vc_bottom == conp2->vc_rows)
2812 conp2->vc_top = 0;
2813 if (logo_shown == vc->vc_num) {
2814 unsigned long p, q;
2815 int i;
2816
2817 p = softback_in;
2818 q = vc->vc_origin +
2819 logo_lines * vc->vc_size_row;
2820 for (i = 0; i < logo_lines; i++) {
2821 if (p == softback_top)
2822 break;
2823 if (p == softback_buf)
2824 p = softback_end;
2825 p -= vc->vc_size_row;
2826 q -= vc->vc_size_row;
2827 scr_memcpyw((u16 *) q, (u16 *) p,
2828 vc->vc_size_row);
2829 }
2830 softback_in = softback_curr = p;
2831 update_region(vc, vc->vc_origin,
2832 logo_lines * vc->vc_cols);
2833 }
2834 logo_shown = FBCON_LOGO_CANSHOW;
2835 }
2836 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2837 fbcon_redraw_softback(vc, disp, lines);
2838 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2839 return 0;
2840 }
2841
2842 if (!scrollback_phys_max)
2843 return -ENOSYS;
2844
2845 scrollback_old = scrollback_current;
2846 scrollback_current -= lines;
2847 if (scrollback_current < 0)
2848 scrollback_current = 0;
2849 else if (scrollback_current > scrollback_max)
2850 scrollback_current = scrollback_max;
2851 if (scrollback_current == scrollback_old)
2852 return 0;
2853
2854 if (fbcon_is_inactive(vc, info))
2855 return 0;
2856
2857 fbcon_cursor(vc, CM_ERASE);
2858
2859 offset = disp->yscroll - scrollback_current;
2860 limit = disp->vrows;
2861 switch (disp->scrollmode) {
2862 case SCROLL_WRAP_MOVE:
2863 info->var.vmode |= FB_VMODE_YWRAP;
2864 break;
2865 case SCROLL_PAN_MOVE:
2866 case SCROLL_PAN_REDRAW:
2867 limit -= vc->vc_rows;
2868 info->var.vmode &= ~FB_VMODE_YWRAP;
2869 break;
2870 }
2871 if (offset < 0)
2872 offset += limit;
2873 else if (offset >= limit)
2874 offset -= limit;
2875
2876 ops->var.xoffset = 0;
2877 ops->var.yoffset = offset * vc->vc_font.height;
2878 ops->update_start(info);
2879
2880 if (!scrollback_current)
2881 fbcon_cursor(vc, CM_DRAW);
2882 return 0;
2883 }
2884
2885 static int fbcon_set_origin(struct vc_data *vc)
2886 {
2887 if (softback_lines)
2888 fbcon_scrolldelta(vc, softback_lines);
2889 return 0;
2890 }
2891
2892 static void fbcon_suspended(struct fb_info *info)
2893 {
2894 struct vc_data *vc = NULL;
2895 struct fbcon_ops *ops = info->fbcon_par;
2896
2897 if (!ops || ops->currcon < 0)
2898 return;
2899 vc = vc_cons[ops->currcon].d;
2900
2901 /* Clear cursor, restore saved data */
2902 fbcon_cursor(vc, CM_ERASE);
2903 }
2904
2905 static void fbcon_resumed(struct fb_info *info)
2906 {
2907 struct vc_data *vc;
2908 struct fbcon_ops *ops = info->fbcon_par;
2909
2910 if (!ops || ops->currcon < 0)
2911 return;
2912 vc = vc_cons[ops->currcon].d;
2913
2914 update_screen(vc);
2915 }
2916
2917 static void fbcon_modechanged(struct fb_info *info)
2918 {
2919 struct fbcon_ops *ops = info->fbcon_par;
2920 struct vc_data *vc;
2921 struct display *p;
2922 int rows, cols;
2923
2924 if (!ops || ops->currcon < 0)
2925 return;
2926 vc = vc_cons[ops->currcon].d;
2927 if (vc->vc_mode != KD_TEXT ||
2928 registered_fb[con2fb_map[ops->currcon]] != info)
2929 return;
2930
2931 p = &fb_display[vc->vc_num];
2932 set_blitting_type(vc, info);
2933
2934 if (CON_IS_VISIBLE(vc)) {
2935 var_to_display(p, &info->var, info);
2936 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2937 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2938 cols /= vc->vc_font.width;
2939 rows /= vc->vc_font.height;
2940 vc_resize(vc, cols, rows);
2941 updatescrollmode(p, info, vc);
2942 scrollback_max = 0;
2943 scrollback_current = 0;
2944
2945 if (!fbcon_is_inactive(vc, info)) {
2946 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2947 ops->update_start(info);
2948 }
2949
2950 fbcon_set_palette(vc, color_table);
2951 update_screen(vc);
2952 if (softback_buf)
2953 fbcon_update_softback(vc);
2954 }
2955 }
2956
2957 static void fbcon_set_all_vcs(struct fb_info *info)
2958 {
2959 struct fbcon_ops *ops = info->fbcon_par;
2960 struct vc_data *vc;
2961 struct display *p;
2962 int i, rows, cols, fg = -1;
2963
2964 if (!ops || ops->currcon < 0)
2965 return;
2966
2967 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2968 vc = vc_cons[i].d;
2969 if (!vc || vc->vc_mode != KD_TEXT ||
2970 registered_fb[con2fb_map[i]] != info)
2971 continue;
2972
2973 if (CON_IS_VISIBLE(vc)) {
2974 fg = i;
2975 continue;
2976 }
2977
2978 p = &fb_display[vc->vc_num];
2979 set_blitting_type(vc, info);
2980 var_to_display(p, &info->var, info);
2981 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2982 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2983 cols /= vc->vc_font.width;
2984 rows /= vc->vc_font.height;
2985 vc_resize(vc, cols, rows);
2986 }
2987
2988 if (fg != -1)
2989 fbcon_modechanged(info);
2990 }
2991
2992 static int fbcon_mode_deleted(struct fb_info *info,
2993 struct fb_videomode *mode)
2994 {
2995 struct fb_info *fb_info;
2996 struct display *p;
2997 int i, j, found = 0;
2998
2999 /* before deletion, ensure that mode is not in use */
3000 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3001 j = con2fb_map[i];
3002 if (j == -1)
3003 continue;
3004 fb_info = registered_fb[j];
3005 if (fb_info != info)
3006 continue;
3007 p = &fb_display[i];
3008 if (!p || !p->mode)
3009 continue;
3010 if (fb_mode_is_equal(p->mode, mode)) {
3011 found = 1;
3012 break;
3013 }
3014 }
3015 return found;
3016 }
3017
3018 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3019 static int fbcon_unbind(void)
3020 {
3021 int ret;
3022
3023 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3024 fbcon_is_default);
3025
3026 if (!ret)
3027 fbcon_has_console_bind = 0;
3028
3029 return ret;
3030 }
3031 #else
3032 static inline int fbcon_unbind(void)
3033 {
3034 return -EINVAL;
3035 }
3036 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3037
3038 /* called with console_lock held */
3039 static int fbcon_fb_unbind(int idx)
3040 {
3041 int i, new_idx = -1, ret = 0;
3042
3043 if (!fbcon_has_console_bind)
3044 return 0;
3045
3046 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3047 if (con2fb_map[i] != idx &&
3048 con2fb_map[i] != -1) {
3049 new_idx = i;
3050 break;
3051 }
3052 }
3053
3054 if (new_idx != -1) {
3055 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3056 if (con2fb_map[i] == idx)
3057 set_con2fb_map(i, new_idx, 0);
3058 }
3059 } else
3060 ret = fbcon_unbind();
3061
3062 return ret;
3063 }
3064
3065 /* called with console_lock held */
3066 static int fbcon_fb_unregistered(struct fb_info *info)
3067 {
3068 int i, idx;
3069
3070 idx = info->node;
3071 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3072 if (con2fb_map[i] == idx)
3073 con2fb_map[i] = -1;
3074 }
3075
3076 if (idx == info_idx) {
3077 info_idx = -1;
3078
3079 for (i = 0; i < FB_MAX; i++) {
3080 if (registered_fb[i] != NULL) {
3081 info_idx = i;
3082 break;
3083 }
3084 }
3085 }
3086
3087 if (info_idx != -1) {
3088 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3089 if (con2fb_map[i] == -1)
3090 con2fb_map[i] = info_idx;
3091 }
3092 }
3093
3094 if (primary_device == idx)
3095 primary_device = -1;
3096
3097 if (!num_registered_fb)
3098 do_unregister_con_driver(&fb_con);
3099
3100 return 0;
3101 }
3102
3103 /* called with console_lock held */
3104 static void fbcon_remap_all(int idx)
3105 {
3106 int i;
3107 for (i = first_fb_vc; i <= last_fb_vc; i++)
3108 set_con2fb_map(i, idx, 0);
3109
3110 if (con_is_bound(&fb_con)) {
3111 printk(KERN_INFO "fbcon: Remapping primary device, "
3112 "fb%i, to tty %i-%i\n", idx,
3113 first_fb_vc + 1, last_fb_vc + 1);
3114 info_idx = idx;
3115 }
3116 }
3117
3118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3119 static void fbcon_select_primary(struct fb_info *info)
3120 {
3121 if (!map_override && primary_device == -1 &&
3122 fb_is_primary_device(info)) {
3123 int i;
3124
3125 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3126 info->fix.id, info->node);
3127 primary_device = info->node;
3128
3129 for (i = first_fb_vc; i <= last_fb_vc; i++)
3130 con2fb_map_boot[i] = primary_device;
3131
3132 if (con_is_bound(&fb_con)) {
3133 printk(KERN_INFO "fbcon: Remapping primary device, "
3134 "fb%i, to tty %i-%i\n", info->node,
3135 first_fb_vc + 1, last_fb_vc + 1);
3136 info_idx = primary_device;
3137 }
3138 }
3139
3140 }
3141 #else
3142 static inline void fbcon_select_primary(struct fb_info *info)
3143 {
3144 return;
3145 }
3146 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3147
3148 /* called with console_lock held */
3149 static int fbcon_fb_registered(struct fb_info *info)
3150 {
3151 int ret = 0, i, idx;
3152
3153 idx = info->node;
3154 fbcon_select_primary(info);
3155
3156 if (info_idx == -1) {
3157 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3158 if (con2fb_map_boot[i] == idx) {
3159 info_idx = idx;
3160 break;
3161 }
3162 }
3163
3164 if (info_idx != -1)
3165 ret = do_fbcon_takeover(1);
3166 } else {
3167 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3168 if (con2fb_map_boot[i] == idx)
3169 set_con2fb_map(i, idx, 0);
3170 }
3171 }
3172
3173 return ret;
3174 }
3175
3176 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3177 {
3178 struct fbcon_ops *ops = info->fbcon_par;
3179 struct vc_data *vc;
3180
3181 if (!ops || ops->currcon < 0)
3182 return;
3183
3184 vc = vc_cons[ops->currcon].d;
3185 if (vc->vc_mode != KD_TEXT ||
3186 registered_fb[con2fb_map[ops->currcon]] != info)
3187 return;
3188
3189 if (CON_IS_VISIBLE(vc)) {
3190 if (blank)
3191 do_blank_screen(0);
3192 else
3193 do_unblank_screen(0);
3194 }
3195 ops->blank_state = blank;
3196 }
3197
3198 static void fbcon_new_modelist(struct fb_info *info)
3199 {
3200 int i;
3201 struct vc_data *vc;
3202 struct fb_var_screeninfo var;
3203 const struct fb_videomode *mode;
3204
3205 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3206 if (registered_fb[con2fb_map[i]] != info)
3207 continue;
3208 if (!fb_display[i].mode)
3209 continue;
3210 vc = vc_cons[i].d;
3211 display_to_var(&var, &fb_display[i]);
3212 mode = fb_find_nearest_mode(fb_display[i].mode,
3213 &info->modelist);
3214 fb_videomode_to_var(&var, mode);
3215 fbcon_set_disp(info, &var, vc->vc_num);
3216 }
3217 }
3218
3219 static void fbcon_get_requirement(struct fb_info *info,
3220 struct fb_blit_caps *caps)
3221 {
3222 struct vc_data *vc;
3223 struct display *p;
3224
3225 if (caps->flags) {
3226 int i, charcnt;
3227
3228 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3229 vc = vc_cons[i].d;
3230 if (vc && vc->vc_mode == KD_TEXT &&
3231 info->node == con2fb_map[i]) {
3232 p = &fb_display[i];
3233 caps->x |= 1 << (vc->vc_font.width - 1);
3234 caps->y |= 1 << (vc->vc_font.height - 1);
3235 charcnt = (p->userfont) ?
3236 FNTCHARCNT(p->fontdata) : 256;
3237 if (caps->len < charcnt)
3238 caps->len = charcnt;
3239 }
3240 }
3241 } else {
3242 vc = vc_cons[fg_console].d;
3243
3244 if (vc && vc->vc_mode == KD_TEXT &&
3245 info->node == con2fb_map[fg_console]) {
3246 p = &fb_display[fg_console];
3247 caps->x = 1 << (vc->vc_font.width - 1);
3248 caps->y = 1 << (vc->vc_font.height - 1);
3249 caps->len = (p->userfont) ?
3250 FNTCHARCNT(p->fontdata) : 256;
3251 }
3252 }
3253 }
3254
3255 static int fbcon_event_notify(struct notifier_block *self,
3256 unsigned long action, void *data)
3257 {
3258 struct fb_event *event = data;
3259 struct fb_info *info = event->info;
3260 struct fb_videomode *mode;
3261 struct fb_con2fbmap *con2fb;
3262 struct fb_blit_caps *caps;
3263 int idx, ret = 0;
3264
3265 /*
3266 * ignore all events except driver registration and deregistration
3267 * if fbcon is not active
3268 */
3269 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3270 action == FB_EVENT_FB_UNREGISTERED))
3271 goto done;
3272
3273 switch(action) {
3274 case FB_EVENT_SUSPEND:
3275 fbcon_suspended(info);
3276 break;
3277 case FB_EVENT_RESUME:
3278 fbcon_resumed(info);
3279 break;
3280 case FB_EVENT_MODE_CHANGE:
3281 fbcon_modechanged(info);
3282 break;
3283 case FB_EVENT_MODE_CHANGE_ALL:
3284 fbcon_set_all_vcs(info);
3285 break;
3286 case FB_EVENT_MODE_DELETE:
3287 mode = event->data;
3288 ret = fbcon_mode_deleted(info, mode);
3289 break;
3290 case FB_EVENT_FB_UNBIND:
3291 idx = info->node;
3292 ret = fbcon_fb_unbind(idx);
3293 break;
3294 case FB_EVENT_FB_REGISTERED:
3295 ret = fbcon_fb_registered(info);
3296 break;
3297 case FB_EVENT_FB_UNREGISTERED:
3298 ret = fbcon_fb_unregistered(info);
3299 break;
3300 case FB_EVENT_SET_CONSOLE_MAP:
3301 /* called with console lock held */
3302 con2fb = event->data;
3303 ret = set_con2fb_map(con2fb->console - 1,
3304 con2fb->framebuffer, 1);
3305 break;
3306 case FB_EVENT_GET_CONSOLE_MAP:
3307 con2fb = event->data;
3308 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3309 break;
3310 case FB_EVENT_BLANK:
3311 fbcon_fb_blanked(info, *(int *)event->data);
3312 break;
3313 case FB_EVENT_NEW_MODELIST:
3314 fbcon_new_modelist(info);
3315 break;
3316 case FB_EVENT_GET_REQ:
3317 caps = event->data;
3318 fbcon_get_requirement(info, caps);
3319 break;
3320 case FB_EVENT_REMAP_ALL_CONSOLE:
3321 idx = info->node;
3322 fbcon_remap_all(idx);
3323 break;
3324 }
3325 done:
3326 return ret;
3327 }
3328
3329 /*
3330 * The console `switch' structure for the frame buffer based console
3331 */
3332
3333 static const struct consw fb_con = {
3334 .owner = THIS_MODULE,
3335 .con_startup = fbcon_startup,
3336 .con_init = fbcon_init,
3337 .con_deinit = fbcon_deinit,
3338 .con_clear = fbcon_clear,
3339 .con_putc = fbcon_putc,
3340 .con_putcs = fbcon_putcs,
3341 .con_cursor = fbcon_cursor,
3342 .con_scroll = fbcon_scroll,
3343 .con_bmove = fbcon_bmove,
3344 .con_switch = fbcon_switch,
3345 .con_blank = fbcon_blank,
3346 .con_font_set = fbcon_set_font,
3347 .con_font_get = fbcon_get_font,
3348 .con_font_default = fbcon_set_def_font,
3349 .con_font_copy = fbcon_copy_font,
3350 .con_set_palette = fbcon_set_palette,
3351 .con_scrolldelta = fbcon_scrolldelta,
3352 .con_set_origin = fbcon_set_origin,
3353 .con_invert_region = fbcon_invert_region,
3354 .con_screen_pos = fbcon_screen_pos,
3355 .con_getxy = fbcon_getxy,
3356 .con_resize = fbcon_resize,
3357 .con_debug_enter = fbcon_debug_enter,
3358 .con_debug_leave = fbcon_debug_leave,
3359 };
3360
3361 static struct notifier_block fbcon_event_notifier = {
3362 .notifier_call = fbcon_event_notify,
3363 };
3364
3365 static ssize_t store_rotate(struct device *device,
3366 struct device_attribute *attr, const char *buf,
3367 size_t count)
3368 {
3369 struct fb_info *info;
3370 int rotate, idx;
3371 char **last = NULL;
3372
3373 if (fbcon_has_exited)
3374 return count;
3375
3376 console_lock();
3377 idx = con2fb_map[fg_console];
3378
3379 if (idx == -1 || registered_fb[idx] == NULL)
3380 goto err;
3381
3382 info = registered_fb[idx];
3383 rotate = simple_strtoul(buf, last, 0);
3384 fbcon_rotate(info, rotate);
3385 err:
3386 console_unlock();
3387 return count;
3388 }
3389
3390 static ssize_t store_rotate_all(struct device *device,
3391 struct device_attribute *attr,const char *buf,
3392 size_t count)
3393 {
3394 struct fb_info *info;
3395 int rotate, idx;
3396 char **last = NULL;
3397
3398 if (fbcon_has_exited)
3399 return count;
3400
3401 console_lock();
3402 idx = con2fb_map[fg_console];
3403
3404 if (idx == -1 || registered_fb[idx] == NULL)
3405 goto err;
3406
3407 info = registered_fb[idx];
3408 rotate = simple_strtoul(buf, last, 0);
3409 fbcon_rotate_all(info, rotate);
3410 err:
3411 console_unlock();
3412 return count;
3413 }
3414
3415 static ssize_t show_rotate(struct device *device,
3416 struct device_attribute *attr,char *buf)
3417 {
3418 struct fb_info *info;
3419 int rotate = 0, idx;
3420
3421 if (fbcon_has_exited)
3422 return 0;
3423
3424 console_lock();
3425 idx = con2fb_map[fg_console];
3426
3427 if (idx == -1 || registered_fb[idx] == NULL)
3428 goto err;
3429
3430 info = registered_fb[idx];
3431 rotate = fbcon_get_rotate(info);
3432 err:
3433 console_unlock();
3434 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3435 }
3436
3437 static ssize_t show_cursor_blink(struct device *device,
3438 struct device_attribute *attr, char *buf)
3439 {
3440 struct fb_info *info;
3441 struct fbcon_ops *ops;
3442 int idx, blink = -1;
3443
3444 if (fbcon_has_exited)
3445 return 0;
3446
3447 console_lock();
3448 idx = con2fb_map[fg_console];
3449
3450 if (idx == -1 || registered_fb[idx] == NULL)
3451 goto err;
3452
3453 info = registered_fb[idx];
3454 ops = info->fbcon_par;
3455
3456 if (!ops)
3457 goto err;
3458
3459 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3460 err:
3461 console_unlock();
3462 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3463 }
3464
3465 static ssize_t store_cursor_blink(struct device *device,
3466 struct device_attribute *attr,
3467 const char *buf, size_t count)
3468 {
3469 struct fb_info *info;
3470 int blink, idx;
3471 char **last = NULL;
3472
3473 if (fbcon_has_exited)
3474 return count;
3475
3476 console_lock();
3477 idx = con2fb_map[fg_console];
3478
3479 if (idx == -1 || registered_fb[idx] == NULL)
3480 goto err;
3481
3482 info = registered_fb[idx];
3483
3484 if (!info->fbcon_par)
3485 goto err;
3486
3487 blink = simple_strtoul(buf, last, 0);
3488
3489 if (blink) {
3490 fbcon_cursor_noblink = 0;
3491 fbcon_add_cursor_timer(info);
3492 } else {
3493 fbcon_cursor_noblink = 1;
3494 fbcon_del_cursor_timer(info);
3495 }
3496
3497 err:
3498 console_unlock();
3499 return count;
3500 }
3501
3502 static struct device_attribute device_attrs[] = {
3503 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3504 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3505 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3506 store_cursor_blink),
3507 };
3508
3509 static int fbcon_init_device(void)
3510 {
3511 int i, error = 0;
3512
3513 fbcon_has_sysfs = 1;
3514
3515 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3516 error = device_create_file(fbcon_device, &device_attrs[i]);
3517
3518 if (error)
3519 break;
3520 }
3521
3522 if (error) {
3523 while (--i >= 0)
3524 device_remove_file(fbcon_device, &device_attrs[i]);
3525
3526 fbcon_has_sysfs = 0;
3527 }
3528
3529 return 0;
3530 }
3531
3532 static void fbcon_start(void)
3533 {
3534 if (num_registered_fb) {
3535 int i;
3536
3537 console_lock();
3538
3539 for (i = 0; i < FB_MAX; i++) {
3540 if (registered_fb[i] != NULL) {
3541 info_idx = i;
3542 break;
3543 }
3544 }
3545
3546 console_unlock();
3547 fbcon_takeover(0);
3548 }
3549 }
3550
3551 static void fbcon_exit(void)
3552 {
3553 struct fb_info *info;
3554 int i, j, mapped;
3555
3556 if (fbcon_has_exited)
3557 return;
3558
3559 kfree((void *)softback_buf);
3560 softback_buf = 0UL;
3561
3562 for (i = 0; i < FB_MAX; i++) {
3563 int pending = 0;
3564
3565 mapped = 0;
3566 info = registered_fb[i];
3567
3568 if (info == NULL)
3569 continue;
3570
3571 if (info->queue.func)
3572 pending = cancel_work_sync(&info->queue);
3573 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3574 "no"));
3575
3576 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3577 if (con2fb_map[j] == i)
3578 mapped = 1;
3579 }
3580
3581 if (mapped) {
3582 if (info->fbops->fb_release)
3583 info->fbops->fb_release(info, 0);
3584 module_put(info->fbops->owner);
3585
3586 if (info->fbcon_par) {
3587 struct fbcon_ops *ops = info->fbcon_par;
3588
3589 fbcon_del_cursor_timer(info);
3590 kfree(ops->cursor_src);
3591 kfree(info->fbcon_par);
3592 info->fbcon_par = NULL;
3593 }
3594
3595 if (info->queue.func == fb_flashcursor)
3596 info->queue.func = NULL;
3597 }
3598 }
3599
3600 fbcon_has_exited = 1;
3601 }
3602
3603 static int __init fb_console_init(void)
3604 {
3605 int i;
3606
3607 console_lock();
3608 fb_register_client(&fbcon_event_notifier);
3609 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3610 "fbcon");
3611
3612 if (IS_ERR(fbcon_device)) {
3613 printk(KERN_WARNING "Unable to create device "
3614 "for fbcon; errno = %ld\n",
3615 PTR_ERR(fbcon_device));
3616 fbcon_device = NULL;
3617 } else
3618 fbcon_init_device();
3619
3620 for (i = 0; i < MAX_NR_CONSOLES; i++)
3621 con2fb_map[i] = -1;
3622
3623 console_unlock();
3624 fbcon_start();
3625 return 0;
3626 }
3627
3628 module_init(fb_console_init);
3629
3630 #ifdef MODULE
3631
3632 static void __exit fbcon_deinit_device(void)
3633 {
3634 int i;
3635
3636 if (fbcon_has_sysfs) {
3637 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3638 device_remove_file(fbcon_device, &device_attrs[i]);
3639
3640 fbcon_has_sysfs = 0;
3641 }
3642 }
3643
3644 static void __exit fb_console_exit(void)
3645 {
3646 console_lock();
3647 fb_unregister_client(&fbcon_event_notifier);
3648 fbcon_deinit_device();
3649 device_destroy(fb_class, MKDEV(0, 0));
3650 fbcon_exit();
3651 console_unlock();
3652 unregister_con_driver(&fb_con);
3653 }
3654
3655 module_exit(fb_console_exit);
3656
3657 #endif
3658
3659 MODULE_LICENSE("GPL");