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Linux 2.6.33-rc6
[cris-mirror.git] / drivers / video / console / fbcon.c
blob3681c6a8821239ad58858a062e0f2e6177f994fa
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 #include <asm/system.h>
81
82 #include "fbcon.h"
83
84 #ifdef FBCONDEBUG
85 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
86 #else
87 # define DPRINTK(fmt, args...)
88 #endif
89
90 enum {
91 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
92 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
93 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
94 };
95
96 static struct display fb_display[MAX_NR_CONSOLES];
97
98 static signed char con2fb_map[MAX_NR_CONSOLES];
99 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
100
101 static int logo_lines;
102 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
103 enums. */
104 static int logo_shown = FBCON_LOGO_CANSHOW;
105 /* Software scrollback */
106 static int fbcon_softback_size = 32768;
107 static unsigned long softback_buf, softback_curr;
108 static unsigned long softback_in;
109 static unsigned long softback_top, softback_end;
110 static int softback_lines;
111 /* console mappings */
112 static int first_fb_vc;
113 static int last_fb_vc = MAX_NR_CONSOLES - 1;
114 static int fbcon_is_default = 1;
115 static int fbcon_has_exited;
116 static int primary_device = -1;
117 static int fbcon_has_console_bind;
118
119 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
120 static int map_override;
121
122 static inline void fbcon_map_override(void)
123 {
124 map_override = 1;
125 }
126 #else
127 static inline void fbcon_map_override(void)
128 {
129 }
130 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
131
132 /* font data */
133 static char fontname[40];
134
135 /* current fb_info */
136 static int info_idx = -1;
137
138 /* console rotation */
139 static int initial_rotation;
140 static int fbcon_has_sysfs;
141
142 static const struct consw fb_con;
143
144 #define CM_SOFTBACK (8)
145
146 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
147
148 static int fbcon_set_origin(struct vc_data *);
149
150 #define CURSOR_DRAW_DELAY (1)
151
152 static int vbl_cursor_cnt;
153 static int fbcon_cursor_noblink;
154
155 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
156
157 /*
158 * Interface used by the world
159 */
160
161 static const char *fbcon_startup(void);
162 static void fbcon_init(struct vc_data *vc, int init);
163 static void fbcon_deinit(struct vc_data *vc);
164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
165 int width);
166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
168 int count, int ypos, int xpos);
169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
170 static void fbcon_cursor(struct vc_data *vc, int mode);
171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
172 int count);
173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
174 int height, int width);
175 static int fbcon_switch(struct vc_data *vc);
176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
179
180 /*
181 * Internal routines
182 */
183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
185 static __inline__ void ypan_up(struct vc_data *vc, int count);
186 static __inline__ void ypan_down(struct vc_data *vc, int count);
187 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
188 int dy, int dx, int height, int width, u_int y_break);
189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 int unit);
191 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
192 int line, int count, int dy);
193 static void fbcon_modechanged(struct fb_info *info);
194 static void fbcon_set_all_vcs(struct fb_info *info);
195 static void fbcon_start(void);
196 static void fbcon_exit(void);
197 static struct device *fbcon_device;
198
199 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
200 static inline void fbcon_set_rotation(struct fb_info *info)
201 {
202 struct fbcon_ops *ops = info->fbcon_par;
203
204 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
205 ops->p->con_rotate < 4)
206 ops->rotate = ops->p->con_rotate;
207 else
208 ops->rotate = 0;
209 }
210
211 static void fbcon_rotate(struct fb_info *info, u32 rotate)
212 {
213 struct fbcon_ops *ops= info->fbcon_par;
214 struct fb_info *fb_info;
215
216 if (!ops || ops->currcon == -1)
217 return;
218
219 fb_info = registered_fb[con2fb_map[ops->currcon]];
220
221 if (info == fb_info) {
222 struct display *p = &fb_display[ops->currcon];
223
224 if (rotate < 4)
225 p->con_rotate = rotate;
226 else
227 p->con_rotate = 0;
228
229 fbcon_modechanged(info);
230 }
231 }
232
233 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
234 {
235 struct fbcon_ops *ops = info->fbcon_par;
236 struct vc_data *vc;
237 struct display *p;
238 int i;
239
240 if (!ops || ops->currcon < 0 || rotate > 3)
241 return;
242
243 for (i = first_fb_vc; i <= last_fb_vc; i++) {
244 vc = vc_cons[i].d;
245 if (!vc || vc->vc_mode != KD_TEXT ||
246 registered_fb[con2fb_map[i]] != info)
247 continue;
248
249 p = &fb_display[vc->vc_num];
250 p->con_rotate = rotate;
251 }
252
253 fbcon_set_all_vcs(info);
254 }
255 #else
256 static inline void fbcon_set_rotation(struct fb_info *info)
257 {
258 struct fbcon_ops *ops = info->fbcon_par;
259
260 ops->rotate = FB_ROTATE_UR;
261 }
262
263 static void fbcon_rotate(struct fb_info *info, u32 rotate)
264 {
265 return;
266 }
267
268 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
269 {
270 return;
271 }
272 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
273
274 static int fbcon_get_rotate(struct fb_info *info)
275 {
276 struct fbcon_ops *ops = info->fbcon_par;
277
278 return (ops) ? ops->rotate : 0;
279 }
280
281 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
282 {
283 struct fbcon_ops *ops = info->fbcon_par;
284
285 return (info->state != FBINFO_STATE_RUNNING ||
286 vc->vc_mode != KD_TEXT || ops->graphics);
287 }
288
289 static inline 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 display *p;
373 struct vc_data *vc = NULL;
374 int c;
375 int mode;
376
377 acquire_console_sem();
378 if (ops && ops->currcon != -1)
379 vc = vc_cons[ops->currcon].d;
380
381 if (!vc || !CON_IS_VISIBLE(vc) ||
382 registered_fb[con2fb_map[vc->vc_num]] != info ||
383 vc->vc_deccm != 1) {
384 release_console_sem();
385 return;
386 }
387
388 p = &fb_display[vc->vc_num];
389 c = scr_readw((u16 *) vc->vc_pos);
390 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
391 CM_ERASE : CM_DRAW;
392 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
393 get_color(vc, info, c, 0));
394 release_console_sem();
395 }
396
397 static void cursor_timer_handler(unsigned long dev_addr)
398 {
399 struct fb_info *info = (struct fb_info *) dev_addr;
400 struct fbcon_ops *ops = info->fbcon_par;
401
402 schedule_work(&info->queue);
403 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
404 }
405
406 static void fbcon_add_cursor_timer(struct fb_info *info)
407 {
408 struct fbcon_ops *ops = info->fbcon_par;
409
410 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
411 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
412 !fbcon_cursor_noblink) {
413 if (!info->queue.func)
414 INIT_WORK(&info->queue, fb_flashcursor);
415
416 init_timer(&ops->cursor_timer);
417 ops->cursor_timer.function = cursor_timer_handler;
418 ops->cursor_timer.expires = jiffies + HZ / 5;
419 ops->cursor_timer.data = (unsigned long ) info;
420 add_timer(&ops->cursor_timer);
421 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
422 }
423 }
424
425 static void fbcon_del_cursor_timer(struct fb_info *info)
426 {
427 struct fbcon_ops *ops = info->fbcon_par;
428
429 if (info->queue.func == fb_flashcursor &&
430 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
431 del_timer_sync(&ops->cursor_timer);
432 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
433 }
434 }
435
436 #ifndef MODULE
437 static int __init fb_console_setup(char *this_opt)
438 {
439 char *options;
440 int i, j;
441
442 if (!this_opt || !*this_opt)
443 return 1;
444
445 while ((options = strsep(&this_opt, ",")) != NULL) {
446 if (!strncmp(options, "font:", 5))
447 strcpy(fontname, options + 5);
448
449 if (!strncmp(options, "scrollback:", 11)) {
450 options += 11;
451 if (*options) {
452 fbcon_softback_size = simple_strtoul(options, &options, 0);
453 if (*options == 'k' || *options == 'K') {
454 fbcon_softback_size *= 1024;
455 options++;
456 }
457 if (*options != ',')
458 return 1;
459 options++;
460 } else
461 return 1;
462 }
463
464 if (!strncmp(options, "map:", 4)) {
465 options += 4;
466 if (*options) {
467 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
468 if (!options[j])
469 j = 0;
470 con2fb_map_boot[i] =
471 (options[j++]-'0') % FB_MAX;
472 }
473
474 fbcon_map_override();
475 }
476
477 return 1;
478 }
479
480 if (!strncmp(options, "vc:", 3)) {
481 options += 3;
482 if (*options)
483 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
484 if (first_fb_vc < 0)
485 first_fb_vc = 0;
486 if (*options++ == '-')
487 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
488 fbcon_is_default = 0;
489 }
490
491 if (!strncmp(options, "rotate:", 7)) {
492 options += 7;
493 if (*options)
494 initial_rotation = simple_strtoul(options, &options, 0);
495 if (initial_rotation > 3)
496 initial_rotation = 0;
497 }
498 }
499 return 1;
500 }
501
502 __setup("fbcon=", fb_console_setup);
503 #endif
504
505 static int search_fb_in_map(int idx)
506 {
507 int i, retval = 0;
508
509 for (i = first_fb_vc; i <= last_fb_vc; i++) {
510 if (con2fb_map[i] == idx)
511 retval = 1;
512 }
513 return retval;
514 }
515
516 static int search_for_mapped_con(void)
517 {
518 int i, retval = 0;
519
520 for (i = first_fb_vc; i <= last_fb_vc; i++) {
521 if (con2fb_map[i] != -1)
522 retval = 1;
523 }
524 return retval;
525 }
526
527 static int fbcon_takeover(int show_logo)
528 {
529 int err, i;
530
531 if (!num_registered_fb)
532 return -ENODEV;
533
534 if (!show_logo)
535 logo_shown = FBCON_LOGO_DONTSHOW;
536
537 for (i = first_fb_vc; i <= last_fb_vc; i++)
538 con2fb_map[i] = info_idx;
539
540 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
541 fbcon_is_default);
542
543 if (err) {
544 for (i = first_fb_vc; i <= last_fb_vc; i++) {
545 con2fb_map[i] = -1;
546 }
547 info_idx = -1;
548 } else {
549 fbcon_has_console_bind = 1;
550 }
551
552 return err;
553 }
554
555 #ifdef MODULE
556 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
557 int cols, int rows, int new_cols, int new_rows)
558 {
559 logo_shown = FBCON_LOGO_DONTSHOW;
560 }
561 #else
562 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
563 int cols, int rows, int new_cols, int new_rows)
564 {
565 /* Need to make room for the logo */
566 struct fbcon_ops *ops = info->fbcon_par;
567 int cnt, erase = vc->vc_video_erase_char, step;
568 unsigned short *save = NULL, *r, *q;
569 int logo_height;
570
571 if (info->flags & FBINFO_MODULE) {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 return;
574 }
575
576 /*
577 * remove underline attribute from erase character
578 * if black and white framebuffer.
579 */
580 if (fb_get_color_depth(&info->var, &info->fix) == 1)
581 erase &= ~0x400;
582 logo_height = fb_prepare_logo(info, ops->rotate);
583 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
584 q = (unsigned short *) (vc->vc_origin +
585 vc->vc_size_row * rows);
586 step = logo_lines * cols;
587 for (r = q - logo_lines * cols; r < q; r++)
588 if (scr_readw(r) != vc->vc_video_erase_char)
589 break;
590 if (r != q && new_rows >= rows + logo_lines) {
591 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
592 if (save) {
593 int i = cols < new_cols ? cols : new_cols;
594 scr_memsetw(save, erase, logo_lines * new_cols * 2);
595 r = q - step;
596 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
597 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
598 r = q;
599 }
600 }
601 if (r == q) {
602 /* We can scroll screen down */
603 r = q - step - cols;
604 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
605 scr_memcpyw(r + step, r, vc->vc_size_row);
606 r -= cols;
607 }
608 if (!save) {
609 int lines;
610 if (vc->vc_y + logo_lines >= rows)
611 lines = rows - vc->vc_y - 1;
612 else
613 lines = logo_lines;
614 vc->vc_y += lines;
615 vc->vc_pos += lines * vc->vc_size_row;
616 }
617 }
618 scr_memsetw((unsigned short *) vc->vc_origin,
619 erase,
620 vc->vc_size_row * logo_lines);
621
622 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
623 fbcon_clear_margins(vc, 0);
624 update_screen(vc);
625 }
626
627 if (save) {
628 q = (unsigned short *) (vc->vc_origin +
629 vc->vc_size_row *
630 rows);
631 scr_memcpyw(q, save, logo_lines * new_cols * 2);
632 vc->vc_y += logo_lines;
633 vc->vc_pos += logo_lines * vc->vc_size_row;
634 kfree(save);
635 }
636
637 if (logo_lines > vc->vc_bottom) {
638 logo_shown = FBCON_LOGO_CANSHOW;
639 printk(KERN_INFO
640 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
641 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
642 logo_shown = FBCON_LOGO_DRAW;
643 vc->vc_top = logo_lines;
644 }
645 }
646 #endif /* MODULE */
647
648 #ifdef CONFIG_FB_TILEBLITTING
649 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
650 {
651 struct fbcon_ops *ops = info->fbcon_par;
652
653 ops->p = &fb_display[vc->vc_num];
654
655 if ((info->flags & FBINFO_MISC_TILEBLITTING))
656 fbcon_set_tileops(vc, info);
657 else {
658 fbcon_set_rotation(info);
659 fbcon_set_bitops(ops);
660 }
661 }
662
663 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
664 {
665 int err = 0;
666
667 if (info->flags & FBINFO_MISC_TILEBLITTING &&
668 info->tileops->fb_get_tilemax(info) < charcount)
669 err = 1;
670
671 return err;
672 }
673 #else
674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
675 {
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 info->flags &= ~FBINFO_MISC_TILEBLITTING;
679 ops->p = &fb_display[vc->vc_num];
680 fbcon_set_rotation(info);
681 fbcon_set_bitops(ops);
682 }
683
684 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
685 {
686 return 0;
687 }
688
689 #endif /* CONFIG_MISC_TILEBLITTING */
690
691
692 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
693 int unit, int oldidx)
694 {
695 struct fbcon_ops *ops = NULL;
696 int err = 0;
697
698 if (!try_module_get(info->fbops->owner))
699 err = -ENODEV;
700
701 if (!err && info->fbops->fb_open &&
702 info->fbops->fb_open(info, 0))
703 err = -ENODEV;
704
705 if (!err) {
706 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
707 if (!ops)
708 err = -ENOMEM;
709 }
710
711 if (!err) {
712 info->fbcon_par = ops;
713
714 if (vc)
715 set_blitting_type(vc, info);
716 }
717
718 if (err) {
719 con2fb_map[unit] = oldidx;
720 module_put(info->fbops->owner);
721 }
722
723 return err;
724 }
725
726 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
727 struct fb_info *newinfo, int unit,
728 int oldidx, int found)
729 {
730 struct fbcon_ops *ops = oldinfo->fbcon_par;
731 int err = 0, ret;
732
733 if (oldinfo->fbops->fb_release &&
734 oldinfo->fbops->fb_release(oldinfo, 0)) {
735 con2fb_map[unit] = oldidx;
736 if (!found && newinfo->fbops->fb_release)
737 newinfo->fbops->fb_release(newinfo, 0);
738 if (!found)
739 module_put(newinfo->fbops->owner);
740 err = -ENODEV;
741 }
742
743 if (!err) {
744 fbcon_del_cursor_timer(oldinfo);
745 kfree(ops->cursor_state.mask);
746 kfree(ops->cursor_data);
747 kfree(ops->fontbuffer);
748 kfree(oldinfo->fbcon_par);
749 oldinfo->fbcon_par = NULL;
750 module_put(oldinfo->fbops->owner);
751 /*
752 If oldinfo and newinfo are driving the same hardware,
753 the fb_release() method of oldinfo may attempt to
754 restore the hardware state. This will leave the
755 newinfo in an undefined state. Thus, a call to
756 fb_set_par() may be needed for the newinfo.
757 */
758 if (newinfo->fbops->fb_set_par) {
759 ret = newinfo->fbops->fb_set_par(newinfo);
760
761 if (ret)
762 printk(KERN_ERR "con2fb_release_oldinfo: "
763 "detected unhandled fb_set_par error, "
764 "error code %d\n", ret);
765 }
766 }
767
768 return err;
769 }
770
771 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
772 int unit, int show_logo)
773 {
774 struct fbcon_ops *ops = info->fbcon_par;
775 int ret;
776
777 ops->currcon = fg_console;
778
779 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
780 ret = info->fbops->fb_set_par(info);
781
782 if (ret)
783 printk(KERN_ERR "con2fb_init_display: detected "
784 "unhandled fb_set_par error, "
785 "error code %d\n", ret);
786 }
787
788 ops->flags |= FBCON_FLAGS_INIT;
789 ops->graphics = 0;
790 fbcon_set_disp(info, &info->var, unit);
791
792 if (show_logo) {
793 struct vc_data *fg_vc = vc_cons[fg_console].d;
794 struct fb_info *fg_info =
795 registered_fb[con2fb_map[fg_console]];
796
797 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
798 fg_vc->vc_rows, fg_vc->vc_cols,
799 fg_vc->vc_rows);
800 }
801
802 update_screen(vc_cons[fg_console].d);
803 }
804
805 /**
806 * set_con2fb_map - map console to frame buffer device
807 * @unit: virtual console number to map
808 * @newidx: frame buffer index to map virtual console to
809 * @user: user request
810 *
811 * Maps a virtual console @unit to a frame buffer device
812 * @newidx.
813 */
814 static int set_con2fb_map(int unit, int newidx, int user)
815 {
816 struct vc_data *vc = vc_cons[unit].d;
817 int oldidx = con2fb_map[unit];
818 struct fb_info *info = registered_fb[newidx];
819 struct fb_info *oldinfo = NULL;
820 int found, err = 0;
821
822 if (oldidx == newidx)
823 return 0;
824
825 if (!info || fbcon_has_exited)
826 return -EINVAL;
827
828 if (!err && !search_for_mapped_con()) {
829 info_idx = newidx;
830 return fbcon_takeover(0);
831 }
832
833 if (oldidx != -1)
834 oldinfo = registered_fb[oldidx];
835
836 found = search_fb_in_map(newidx);
837
838 acquire_console_sem();
839 con2fb_map[unit] = newidx;
840 if (!err && !found)
841 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
842
843
844 /*
845 * If old fb is not mapped to any of the consoles,
846 * fbcon should release it.
847 */
848 if (!err && oldinfo && !search_fb_in_map(oldidx))
849 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
850 found);
851
852 if (!err) {
853 int show_logo = (fg_console == 0 && !user &&
854 logo_shown != FBCON_LOGO_DONTSHOW);
855
856 if (!found)
857 fbcon_add_cursor_timer(info);
858 con2fb_map_boot[unit] = newidx;
859 con2fb_init_display(vc, info, unit, show_logo);
860 }
861
862 if (!search_fb_in_map(info_idx))
863 info_idx = newidx;
864
865 release_console_sem();
866 return err;
867 }
868
869 /*
870 * Low Level Operations
871 */
872 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
873 static int var_to_display(struct display *disp,
874 struct fb_var_screeninfo *var,
875 struct fb_info *info)
876 {
877 disp->xres_virtual = var->xres_virtual;
878 disp->yres_virtual = var->yres_virtual;
879 disp->bits_per_pixel = var->bits_per_pixel;
880 disp->grayscale = var->grayscale;
881 disp->nonstd = var->nonstd;
882 disp->accel_flags = var->accel_flags;
883 disp->height = var->height;
884 disp->width = var->width;
885 disp->red = var->red;
886 disp->green = var->green;
887 disp->blue = var->blue;
888 disp->transp = var->transp;
889 disp->rotate = var->rotate;
890 disp->mode = fb_match_mode(var, &info->modelist);
891 if (disp->mode == NULL)
892 /* This should not happen */
893 return -EINVAL;
894 return 0;
895 }
896
897 static void display_to_var(struct fb_var_screeninfo *var,
898 struct display *disp)
899 {
900 fb_videomode_to_var(var, disp->mode);
901 var->xres_virtual = disp->xres_virtual;
902 var->yres_virtual = disp->yres_virtual;
903 var->bits_per_pixel = disp->bits_per_pixel;
904 var->grayscale = disp->grayscale;
905 var->nonstd = disp->nonstd;
906 var->accel_flags = disp->accel_flags;
907 var->height = disp->height;
908 var->width = disp->width;
909 var->red = disp->red;
910 var->green = disp->green;
911 var->blue = disp->blue;
912 var->transp = disp->transp;
913 var->rotate = disp->rotate;
914 }
915
916 static const char *fbcon_startup(void)
917 {
918 const char *display_desc = "frame buffer device";
919 struct display *p = &fb_display[fg_console];
920 struct vc_data *vc = vc_cons[fg_console].d;
921 const struct font_desc *font = NULL;
922 struct module *owner;
923 struct fb_info *info = NULL;
924 struct fbcon_ops *ops;
925 int rows, cols;
926
927 /*
928 * If num_registered_fb is zero, this is a call for the dummy part.
929 * The frame buffer devices weren't initialized yet.
930 */
931 if (!num_registered_fb || info_idx == -1)
932 return display_desc;
933 /*
934 * Instead of blindly using registered_fb[0], we use info_idx, set by
935 * fb_console_init();
936 */
937 info = registered_fb[info_idx];
938 if (!info)
939 return NULL;
940
941 owner = info->fbops->owner;
942 if (!try_module_get(owner))
943 return NULL;
944 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
945 module_put(owner);
946 return NULL;
947 }
948
949 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
950 if (!ops) {
951 module_put(owner);
952 return NULL;
953 }
954
955 ops->currcon = -1;
956 ops->graphics = 1;
957 ops->cur_rotate = -1;
958 info->fbcon_par = ops;
959 p->con_rotate = initial_rotation;
960 set_blitting_type(vc, info);
961
962 if (info->fix.type != FB_TYPE_TEXT) {
963 if (fbcon_softback_size) {
964 if (!softback_buf) {
965 softback_buf =
966 (unsigned long)
967 kmalloc(fbcon_softback_size,
968 GFP_KERNEL);
969 if (!softback_buf) {
970 fbcon_softback_size = 0;
971 softback_top = 0;
972 }
973 }
974 } else {
975 if (softback_buf) {
976 kfree((void *) softback_buf);
977 softback_buf = 0;
978 softback_top = 0;
979 }
980 }
981 if (softback_buf)
982 softback_in = softback_top = softback_curr =
983 softback_buf;
984 softback_lines = 0;
985 }
986
987 /* Setup default font */
988 if (!p->fontdata) {
989 if (!fontname[0] || !(font = find_font(fontname)))
990 font = get_default_font(info->var.xres,
991 info->var.yres,
992 info->pixmap.blit_x,
993 info->pixmap.blit_y);
994 vc->vc_font.width = font->width;
995 vc->vc_font.height = font->height;
996 vc->vc_font.data = (void *)(p->fontdata = font->data);
997 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
998 }
999
1000 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1001 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1002 cols /= vc->vc_font.width;
1003 rows /= vc->vc_font.height;
1004 vc_resize(vc, cols, rows);
1005
1006 DPRINTK("mode: %s\n", info->fix.id);
1007 DPRINTK("visual: %d\n", info->fix.visual);
1008 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1009 info->var.yres,
1010 info->var.bits_per_pixel);
1011
1012 fbcon_add_cursor_timer(info);
1013 fbcon_has_exited = 0;
1014 return display_desc;
1015 }
1016
1017 static void fbcon_init(struct vc_data *vc, int init)
1018 {
1019 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1020 struct fbcon_ops *ops;
1021 struct vc_data **default_mode = vc->vc_display_fg;
1022 struct vc_data *svc = *default_mode;
1023 struct display *t, *p = &fb_display[vc->vc_num];
1024 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1025 int cap, ret;
1026
1027 if (info_idx == -1 || info == NULL)
1028 return;
1029
1030 cap = info->flags;
1031
1032 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1033 (info->fix.type == FB_TYPE_TEXT))
1034 logo = 0;
1035
1036 if (var_to_display(p, &info->var, info))
1037 return;
1038
1039 if (!info->fbcon_par)
1040 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1041
1042 /* If we are not the first console on this
1043 fb, copy the font from that console */
1044 t = &fb_display[fg_console];
1045 if (!p->fontdata) {
1046 if (t->fontdata) {
1047 struct vc_data *fvc = vc_cons[fg_console].d;
1048
1049 vc->vc_font.data = (void *)(p->fontdata =
1050 fvc->vc_font.data);
1051 vc->vc_font.width = fvc->vc_font.width;
1052 vc->vc_font.height = fvc->vc_font.height;
1053 p->userfont = t->userfont;
1054
1055 if (p->userfont)
1056 REFCOUNT(p->fontdata)++;
1057 } else {
1058 const struct font_desc *font = NULL;
1059
1060 if (!fontname[0] || !(font = find_font(fontname)))
1061 font = get_default_font(info->var.xres,
1062 info->var.yres,
1063 info->pixmap.blit_x,
1064 info->pixmap.blit_y);
1065 vc->vc_font.width = font->width;
1066 vc->vc_font.height = font->height;
1067 vc->vc_font.data = (void *)(p->fontdata = font->data);
1068 vc->vc_font.charcount = 256; /* FIXME Need to
1069 support more fonts */
1070 }
1071 }
1072
1073 if (p->userfont)
1074 charcnt = FNTCHARCNT(p->fontdata);
1075
1076 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1077 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1078 if (charcnt == 256) {
1079 vc->vc_hi_font_mask = 0;
1080 } else {
1081 vc->vc_hi_font_mask = 0x100;
1082 if (vc->vc_can_do_color)
1083 vc->vc_complement_mask <<= 1;
1084 }
1085
1086 if (!*svc->vc_uni_pagedir_loc)
1087 con_set_default_unimap(svc);
1088 if (!*vc->vc_uni_pagedir_loc)
1089 con_copy_unimap(vc, svc);
1090
1091 ops = info->fbcon_par;
1092 p->con_rotate = initial_rotation;
1093 set_blitting_type(vc, info);
1094
1095 cols = vc->vc_cols;
1096 rows = vc->vc_rows;
1097 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1098 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1099 new_cols /= vc->vc_font.width;
1100 new_rows /= vc->vc_font.height;
1101
1102 /*
1103 * We must always set the mode. The mode of the previous console
1104 * driver could be in the same resolution but we are using different
1105 * hardware so we have to initialize the hardware.
1106 *
1107 * We need to do it in fbcon_init() to prevent screen corruption.
1108 */
1109 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1110 if (info->fbops->fb_set_par &&
1111 !(ops->flags & FBCON_FLAGS_INIT)) {
1112 ret = info->fbops->fb_set_par(info);
1113
1114 if (ret)
1115 printk(KERN_ERR "fbcon_init: detected "
1116 "unhandled fb_set_par error, "
1117 "error code %d\n", ret);
1118 }
1119
1120 ops->flags |= FBCON_FLAGS_INIT;
1121 }
1122
1123 ops->graphics = 0;
1124
1125 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1126 !(cap & FBINFO_HWACCEL_DISABLED))
1127 p->scrollmode = SCROLL_MOVE;
1128 else /* default to something safe */
1129 p->scrollmode = SCROLL_REDRAW;
1130
1131 /*
1132 * ++guenther: console.c:vc_allocate() relies on initializing
1133 * vc_{cols,rows}, but we must not set those if we are only
1134 * resizing the console.
1135 */
1136 if (init) {
1137 vc->vc_cols = new_cols;
1138 vc->vc_rows = new_rows;
1139 } else
1140 vc_resize(vc, new_cols, new_rows);
1141
1142 if (logo)
1143 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1144
1145 if (vc == svc && softback_buf)
1146 fbcon_update_softback(vc);
1147
1148 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1149 ops->rotate = FB_ROTATE_UR;
1150 set_blitting_type(vc, info);
1151 }
1152
1153 ops->p = &fb_display[fg_console];
1154 }
1155
1156 static void fbcon_free_font(struct display *p)
1157 {
1158 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1159 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1160 p->fontdata = NULL;
1161 p->userfont = 0;
1162 }
1163
1164 static void fbcon_deinit(struct vc_data *vc)
1165 {
1166 struct display *p = &fb_display[vc->vc_num];
1167 struct fb_info *info;
1168 struct fbcon_ops *ops;
1169 int idx;
1170
1171 fbcon_free_font(p);
1172 idx = con2fb_map[vc->vc_num];
1173
1174 if (idx == -1)
1175 goto finished;
1176
1177 info = registered_fb[idx];
1178
1179 if (!info)
1180 goto finished;
1181
1182 ops = info->fbcon_par;
1183
1184 if (!ops)
1185 goto finished;
1186
1187 if (CON_IS_VISIBLE(vc))
1188 fbcon_del_cursor_timer(info);
1189
1190 ops->flags &= ~FBCON_FLAGS_INIT;
1191 finished:
1192
1193 if (!con_is_bound(&fb_con))
1194 fbcon_exit();
1195
1196 return;
1197 }
1198
1199 /* ====================================================================== */
1200
1201 /* fbcon_XXX routines - interface used by the world
1202 *
1203 * This system is now divided into two levels because of complications
1204 * caused by hardware scrolling. Top level functions:
1205 *
1206 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1207 *
1208 * handles y values in range [0, scr_height-1] that correspond to real
1209 * screen positions. y_wrap shift means that first line of bitmap may be
1210 * anywhere on this display. These functions convert lineoffsets to
1211 * bitmap offsets and deal with the wrap-around case by splitting blits.
1212 *
1213 * fbcon_bmove_physical_8() -- These functions fast implementations
1214 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1215 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1216 *
1217 * WARNING:
1218 *
1219 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1220 * Implies should only really hardware scroll in rows. Only reason for
1221 * restriction is simplicity & efficiency at the moment.
1222 */
1223
1224 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1225 int width)
1226 {
1227 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1228 struct fbcon_ops *ops = info->fbcon_par;
1229
1230 struct display *p = &fb_display[vc->vc_num];
1231 u_int y_break;
1232
1233 if (fbcon_is_inactive(vc, info))
1234 return;
1235
1236 if (!height || !width)
1237 return;
1238
1239 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1240 vc->vc_top = 0;
1241
1242 /* Split blits that cross physical y_wrap boundary */
1243
1244 y_break = p->vrows - p->yscroll;
1245 if (sy < y_break && sy + height - 1 >= y_break) {
1246 u_int b = y_break - sy;
1247 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1248 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1249 width);
1250 } else
1251 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1252 }
1253
1254 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1255 int count, int ypos, int xpos)
1256 {
1257 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1258 struct display *p = &fb_display[vc->vc_num];
1259 struct fbcon_ops *ops = info->fbcon_par;
1260
1261 if (!fbcon_is_inactive(vc, info))
1262 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1263 get_color(vc, info, scr_readw(s), 1),
1264 get_color(vc, info, scr_readw(s), 0));
1265 }
1266
1267 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1268 {
1269 unsigned short chr;
1270
1271 scr_writew(c, &chr);
1272 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1273 }
1274
1275 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1276 {
1277 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1278 struct fbcon_ops *ops = info->fbcon_par;
1279
1280 if (!fbcon_is_inactive(vc, info))
1281 ops->clear_margins(vc, info, bottom_only);
1282 }
1283
1284 static void fbcon_cursor(struct vc_data *vc, int mode)
1285 {
1286 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1287 struct fbcon_ops *ops = info->fbcon_par;
1288 int y;
1289 int c = scr_readw((u16 *) vc->vc_pos);
1290
1291 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1292 return;
1293
1294 if (vc->vc_cursor_type & 0x10)
1295 fbcon_del_cursor_timer(info);
1296 else
1297 fbcon_add_cursor_timer(info);
1298
1299 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1300 if (mode & CM_SOFTBACK) {
1301 mode &= ~CM_SOFTBACK;
1302 y = softback_lines;
1303 } else {
1304 if (softback_lines)
1305 fbcon_set_origin(vc);
1306 y = 0;
1307 }
1308
1309 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1310 get_color(vc, info, c, 0));
1311 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1312 }
1313
1314 static int scrollback_phys_max = 0;
1315 static int scrollback_max = 0;
1316 static int scrollback_current = 0;
1317
1318 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1319 int unit)
1320 {
1321 struct display *p, *t;
1322 struct vc_data **default_mode, *vc;
1323 struct vc_data *svc;
1324 struct fbcon_ops *ops = info->fbcon_par;
1325 int rows, cols, charcnt = 256;
1326
1327 p = &fb_display[unit];
1328
1329 if (var_to_display(p, var, info))
1330 return;
1331
1332 vc = vc_cons[unit].d;
1333
1334 if (!vc)
1335 return;
1336
1337 default_mode = vc->vc_display_fg;
1338 svc = *default_mode;
1339 t = &fb_display[svc->vc_num];
1340
1341 if (!vc->vc_font.data) {
1342 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1343 vc->vc_font.width = (*default_mode)->vc_font.width;
1344 vc->vc_font.height = (*default_mode)->vc_font.height;
1345 p->userfont = t->userfont;
1346 if (p->userfont)
1347 REFCOUNT(p->fontdata)++;
1348 }
1349 if (p->userfont)
1350 charcnt = FNTCHARCNT(p->fontdata);
1351
1352 var->activate = FB_ACTIVATE_NOW;
1353 info->var.activate = var->activate;
1354 var->yoffset = info->var.yoffset;
1355 var->xoffset = info->var.xoffset;
1356 fb_set_var(info, var);
1357 ops->var = info->var;
1358 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1359 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1360 if (charcnt == 256) {
1361 vc->vc_hi_font_mask = 0;
1362 } else {
1363 vc->vc_hi_font_mask = 0x100;
1364 if (vc->vc_can_do_color)
1365 vc->vc_complement_mask <<= 1;
1366 }
1367
1368 if (!*svc->vc_uni_pagedir_loc)
1369 con_set_default_unimap(svc);
1370 if (!*vc->vc_uni_pagedir_loc)
1371 con_copy_unimap(vc, svc);
1372
1373 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1374 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1375 cols /= vc->vc_font.width;
1376 rows /= vc->vc_font.height;
1377 vc_resize(vc, cols, rows);
1378
1379 if (CON_IS_VISIBLE(vc)) {
1380 update_screen(vc);
1381 if (softback_buf)
1382 fbcon_update_softback(vc);
1383 }
1384 }
1385
1386 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1387 {
1388 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1389 struct fbcon_ops *ops = info->fbcon_par;
1390 struct display *p = &fb_display[vc->vc_num];
1391
1392 p->yscroll += count;
1393 if (p->yscroll >= p->vrows) /* Deal with wrap */
1394 p->yscroll -= p->vrows;
1395 ops->var.xoffset = 0;
1396 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1397 ops->var.vmode |= FB_VMODE_YWRAP;
1398 ops->update_start(info);
1399 scrollback_max += count;
1400 if (scrollback_max > scrollback_phys_max)
1401 scrollback_max = scrollback_phys_max;
1402 scrollback_current = 0;
1403 }
1404
1405 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1406 {
1407 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1408 struct fbcon_ops *ops = info->fbcon_par;
1409 struct display *p = &fb_display[vc->vc_num];
1410
1411 p->yscroll -= count;
1412 if (p->yscroll < 0) /* Deal with wrap */
1413 p->yscroll += p->vrows;
1414 ops->var.xoffset = 0;
1415 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416 ops->var.vmode |= FB_VMODE_YWRAP;
1417 ops->update_start(info);
1418 scrollback_max -= count;
1419 if (scrollback_max < 0)
1420 scrollback_max = 0;
1421 scrollback_current = 0;
1422 }
1423
1424 static __inline__ void ypan_up(struct vc_data *vc, int count)
1425 {
1426 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1427 struct display *p = &fb_display[vc->vc_num];
1428 struct fbcon_ops *ops = info->fbcon_par;
1429
1430 p->yscroll += count;
1431 if (p->yscroll > p->vrows - vc->vc_rows) {
1432 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1433 0, 0, 0, vc->vc_rows, vc->vc_cols);
1434 p->yscroll -= p->vrows - vc->vc_rows;
1435 }
1436
1437 ops->var.xoffset = 0;
1438 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1439 ops->var.vmode &= ~FB_VMODE_YWRAP;
1440 ops->update_start(info);
1441 fbcon_clear_margins(vc, 1);
1442 scrollback_max += count;
1443 if (scrollback_max > scrollback_phys_max)
1444 scrollback_max = scrollback_phys_max;
1445 scrollback_current = 0;
1446 }
1447
1448 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1449 {
1450 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1451 struct fbcon_ops *ops = info->fbcon_par;
1452 struct display *p = &fb_display[vc->vc_num];
1453
1454 p->yscroll += count;
1455
1456 if (p->yscroll > p->vrows - vc->vc_rows) {
1457 p->yscroll -= p->vrows - vc->vc_rows;
1458 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1459 }
1460
1461 ops->var.xoffset = 0;
1462 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1463 ops->var.vmode &= ~FB_VMODE_YWRAP;
1464 ops->update_start(info);
1465 fbcon_clear_margins(vc, 1);
1466 scrollback_max += count;
1467 if (scrollback_max > scrollback_phys_max)
1468 scrollback_max = scrollback_phys_max;
1469 scrollback_current = 0;
1470 }
1471
1472 static __inline__ void ypan_down(struct vc_data *vc, int count)
1473 {
1474 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1475 struct display *p = &fb_display[vc->vc_num];
1476 struct fbcon_ops *ops = info->fbcon_par;
1477
1478 p->yscroll -= count;
1479 if (p->yscroll < 0) {
1480 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1481 0, vc->vc_rows, vc->vc_cols);
1482 p->yscroll += p->vrows - vc->vc_rows;
1483 }
1484
1485 ops->var.xoffset = 0;
1486 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1487 ops->var.vmode &= ~FB_VMODE_YWRAP;
1488 ops->update_start(info);
1489 fbcon_clear_margins(vc, 1);
1490 scrollback_max -= count;
1491 if (scrollback_max < 0)
1492 scrollback_max = 0;
1493 scrollback_current = 0;
1494 }
1495
1496 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1497 {
1498 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1499 struct fbcon_ops *ops = info->fbcon_par;
1500 struct display *p = &fb_display[vc->vc_num];
1501
1502 p->yscroll -= count;
1503
1504 if (p->yscroll < 0) {
1505 p->yscroll += p->vrows - vc->vc_rows;
1506 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1507 }
1508
1509 ops->var.xoffset = 0;
1510 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1511 ops->var.vmode &= ~FB_VMODE_YWRAP;
1512 ops->update_start(info);
1513 fbcon_clear_margins(vc, 1);
1514 scrollback_max -= count;
1515 if (scrollback_max < 0)
1516 scrollback_max = 0;
1517 scrollback_current = 0;
1518 }
1519
1520 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1521 long delta)
1522 {
1523 int count = vc->vc_rows;
1524 unsigned short *d, *s;
1525 unsigned long n;
1526 int line = 0;
1527
1528 d = (u16 *) softback_curr;
1529 if (d == (u16 *) softback_in)
1530 d = (u16 *) vc->vc_origin;
1531 n = softback_curr + delta * vc->vc_size_row;
1532 softback_lines -= delta;
1533 if (delta < 0) {
1534 if (softback_curr < softback_top && n < softback_buf) {
1535 n += softback_end - softback_buf;
1536 if (n < softback_top) {
1537 softback_lines -=
1538 (softback_top - n) / vc->vc_size_row;
1539 n = softback_top;
1540 }
1541 } else if (softback_curr >= softback_top
1542 && n < softback_top) {
1543 softback_lines -=
1544 (softback_top - n) / vc->vc_size_row;
1545 n = softback_top;
1546 }
1547 } else {
1548 if (softback_curr > softback_in && n >= softback_end) {
1549 n += softback_buf - softback_end;
1550 if (n > softback_in) {
1551 n = softback_in;
1552 softback_lines = 0;
1553 }
1554 } else if (softback_curr <= softback_in && n > softback_in) {
1555 n = softback_in;
1556 softback_lines = 0;
1557 }
1558 }
1559 if (n == softback_curr)
1560 return;
1561 softback_curr = n;
1562 s = (u16 *) softback_curr;
1563 if (s == (u16 *) softback_in)
1564 s = (u16 *) vc->vc_origin;
1565 while (count--) {
1566 unsigned short *start;
1567 unsigned short *le;
1568 unsigned short c;
1569 int x = 0;
1570 unsigned short attr = 1;
1571
1572 start = s;
1573 le = advance_row(s, 1);
1574 do {
1575 c = scr_readw(s);
1576 if (attr != (c & 0xff00)) {
1577 attr = c & 0xff00;
1578 if (s > start) {
1579 fbcon_putcs(vc, start, s - start,
1580 line, x);
1581 x += s - start;
1582 start = s;
1583 }
1584 }
1585 if (c == scr_readw(d)) {
1586 if (s > start) {
1587 fbcon_putcs(vc, start, s - start,
1588 line, x);
1589 x += s - start + 1;
1590 start = s + 1;
1591 } else {
1592 x++;
1593 start++;
1594 }
1595 }
1596 s++;
1597 d++;
1598 } while (s < le);
1599 if (s > start)
1600 fbcon_putcs(vc, start, s - start, line, x);
1601 line++;
1602 if (d == (u16 *) softback_end)
1603 d = (u16 *) softback_buf;
1604 if (d == (u16 *) softback_in)
1605 d = (u16 *) vc->vc_origin;
1606 if (s == (u16 *) softback_end)
1607 s = (u16 *) softback_buf;
1608 if (s == (u16 *) softback_in)
1609 s = (u16 *) vc->vc_origin;
1610 }
1611 }
1612
1613 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1614 int line, int count, int dy)
1615 {
1616 unsigned short *s = (unsigned short *)
1617 (vc->vc_origin + vc->vc_size_row * line);
1618
1619 while (count--) {
1620 unsigned short *start = s;
1621 unsigned short *le = advance_row(s, 1);
1622 unsigned short c;
1623 int x = 0;
1624 unsigned short attr = 1;
1625
1626 do {
1627 c = scr_readw(s);
1628 if (attr != (c & 0xff00)) {
1629 attr = c & 0xff00;
1630 if (s > start) {
1631 fbcon_putcs(vc, start, s - start,
1632 dy, x);
1633 x += s - start;
1634 start = s;
1635 }
1636 }
1637 console_conditional_schedule();
1638 s++;
1639 } while (s < le);
1640 if (s > start)
1641 fbcon_putcs(vc, start, s - start, dy, x);
1642 console_conditional_schedule();
1643 dy++;
1644 }
1645 }
1646
1647 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1648 struct display *p, int line, int count, int ycount)
1649 {
1650 int offset = ycount * vc->vc_cols;
1651 unsigned short *d = (unsigned short *)
1652 (vc->vc_origin + vc->vc_size_row * line);
1653 unsigned short *s = d + offset;
1654 struct fbcon_ops *ops = info->fbcon_par;
1655
1656 while (count--) {
1657 unsigned short *start = s;
1658 unsigned short *le = advance_row(s, 1);
1659 unsigned short c;
1660 int x = 0;
1661
1662 do {
1663 c = scr_readw(s);
1664
1665 if (c == scr_readw(d)) {
1666 if (s > start) {
1667 ops->bmove(vc, info, line + ycount, x,
1668 line, x, 1, s-start);
1669 x += s - start + 1;
1670 start = s + 1;
1671 } else {
1672 x++;
1673 start++;
1674 }
1675 }
1676
1677 scr_writew(c, d);
1678 console_conditional_schedule();
1679 s++;
1680 d++;
1681 } while (s < le);
1682 if (s > start)
1683 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1684 s-start);
1685 console_conditional_schedule();
1686 if (ycount > 0)
1687 line++;
1688 else {
1689 line--;
1690 /* NOTE: We subtract two lines from these pointers */
1691 s -= vc->vc_size_row;
1692 d -= vc->vc_size_row;
1693 }
1694 }
1695 }
1696
1697 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1698 int line, int count, int offset)
1699 {
1700 unsigned short *d = (unsigned short *)
1701 (vc->vc_origin + vc->vc_size_row * line);
1702 unsigned short *s = d + offset;
1703
1704 while (count--) {
1705 unsigned short *start = s;
1706 unsigned short *le = advance_row(s, 1);
1707 unsigned short c;
1708 int x = 0;
1709 unsigned short attr = 1;
1710
1711 do {
1712 c = scr_readw(s);
1713 if (attr != (c & 0xff00)) {
1714 attr = c & 0xff00;
1715 if (s > start) {
1716 fbcon_putcs(vc, start, s - start,
1717 line, x);
1718 x += s - start;
1719 start = s;
1720 }
1721 }
1722 if (c == scr_readw(d)) {
1723 if (s > start) {
1724 fbcon_putcs(vc, start, s - start,
1725 line, x);
1726 x += s - start + 1;
1727 start = s + 1;
1728 } else {
1729 x++;
1730 start++;
1731 }
1732 }
1733 scr_writew(c, d);
1734 console_conditional_schedule();
1735 s++;
1736 d++;
1737 } while (s < le);
1738 if (s > start)
1739 fbcon_putcs(vc, start, s - start, line, x);
1740 console_conditional_schedule();
1741 if (offset > 0)
1742 line++;
1743 else {
1744 line--;
1745 /* NOTE: We subtract two lines from these pointers */
1746 s -= vc->vc_size_row;
1747 d -= vc->vc_size_row;
1748 }
1749 }
1750 }
1751
1752 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1753 int count)
1754 {
1755 unsigned short *p;
1756
1757 if (vc->vc_num != fg_console)
1758 return;
1759 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1760
1761 while (count) {
1762 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1763 count--;
1764 p = advance_row(p, 1);
1765 softback_in += vc->vc_size_row;
1766 if (softback_in == softback_end)
1767 softback_in = softback_buf;
1768 if (softback_in == softback_top) {
1769 softback_top += vc->vc_size_row;
1770 if (softback_top == softback_end)
1771 softback_top = softback_buf;
1772 }
1773 }
1774 softback_curr = softback_in;
1775 }
1776
1777 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1778 int count)
1779 {
1780 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1781 struct display *p = &fb_display[vc->vc_num];
1782 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1783
1784 if (fbcon_is_inactive(vc, info))
1785 return -EINVAL;
1786
1787 fbcon_cursor(vc, CM_ERASE);
1788
1789 /*
1790 * ++Geert: Only use ywrap/ypan if the console is in text mode
1791 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1792 * whole screen (prevents flicker).
1793 */
1794
1795 switch (dir) {
1796 case SM_UP:
1797 if (count > vc->vc_rows) /* Maximum realistic size */
1798 count = vc->vc_rows;
1799 if (softback_top)
1800 fbcon_softback_note(vc, t, count);
1801 if (logo_shown >= 0)
1802 goto redraw_up;
1803 switch (p->scrollmode) {
1804 case SCROLL_MOVE:
1805 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1806 count);
1807 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1808 scr_memsetw((unsigned short *) (vc->vc_origin +
1809 vc->vc_size_row *
1810 (b - count)),
1811 vc->vc_video_erase_char,
1812 vc->vc_size_row * count);
1813 return 1;
1814 break;
1815
1816 case SCROLL_WRAP_MOVE:
1817 if (b - t - count > 3 * vc->vc_rows >> 2) {
1818 if (t > 0)
1819 fbcon_bmove(vc, 0, 0, count, 0, t,
1820 vc->vc_cols);
1821 ywrap_up(vc, count);
1822 if (vc->vc_rows - b > 0)
1823 fbcon_bmove(vc, b - count, 0, b, 0,
1824 vc->vc_rows - b,
1825 vc->vc_cols);
1826 } else if (info->flags & FBINFO_READS_FAST)
1827 fbcon_bmove(vc, t + count, 0, t, 0,
1828 b - t - count, vc->vc_cols);
1829 else
1830 goto redraw_up;
1831 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1832 break;
1833
1834 case SCROLL_PAN_REDRAW:
1835 if ((p->yscroll + count <=
1836 2 * (p->vrows - vc->vc_rows))
1837 && ((!scroll_partial && (b - t == vc->vc_rows))
1838 || (scroll_partial
1839 && (b - t - count >
1840 3 * vc->vc_rows >> 2)))) {
1841 if (t > 0)
1842 fbcon_redraw_move(vc, p, 0, t, count);
1843 ypan_up_redraw(vc, t, count);
1844 if (vc->vc_rows - b > 0)
1845 fbcon_redraw_move(vc, p, b,
1846 vc->vc_rows - b, b);
1847 } else
1848 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1849 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1850 break;
1851
1852 case SCROLL_PAN_MOVE:
1853 if ((p->yscroll + count <=
1854 2 * (p->vrows - vc->vc_rows))
1855 && ((!scroll_partial && (b - t == vc->vc_rows))
1856 || (scroll_partial
1857 && (b - t - count >
1858 3 * vc->vc_rows >> 2)))) {
1859 if (t > 0)
1860 fbcon_bmove(vc, 0, 0, count, 0, t,
1861 vc->vc_cols);
1862 ypan_up(vc, count);
1863 if (vc->vc_rows - b > 0)
1864 fbcon_bmove(vc, b - count, 0, b, 0,
1865 vc->vc_rows - b,
1866 vc->vc_cols);
1867 } else if (info->flags & FBINFO_READS_FAST)
1868 fbcon_bmove(vc, t + count, 0, t, 0,
1869 b - t - count, vc->vc_cols);
1870 else
1871 goto redraw_up;
1872 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1873 break;
1874
1875 case SCROLL_REDRAW:
1876 redraw_up:
1877 fbcon_redraw(vc, p, t, b - t - count,
1878 count * vc->vc_cols);
1879 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1880 scr_memsetw((unsigned short *) (vc->vc_origin +
1881 vc->vc_size_row *
1882 (b - count)),
1883 vc->vc_video_erase_char,
1884 vc->vc_size_row * count);
1885 return 1;
1886 }
1887 break;
1888
1889 case SM_DOWN:
1890 if (count > vc->vc_rows) /* Maximum realistic size */
1891 count = vc->vc_rows;
1892 if (logo_shown >= 0)
1893 goto redraw_down;
1894 switch (p->scrollmode) {
1895 case SCROLL_MOVE:
1896 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1897 -count);
1898 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1899 scr_memsetw((unsigned short *) (vc->vc_origin +
1900 vc->vc_size_row *
1901 t),
1902 vc->vc_video_erase_char,
1903 vc->vc_size_row * count);
1904 return 1;
1905 break;
1906
1907 case SCROLL_WRAP_MOVE:
1908 if (b - t - count > 3 * vc->vc_rows >> 2) {
1909 if (vc->vc_rows - b > 0)
1910 fbcon_bmove(vc, b, 0, b - count, 0,
1911 vc->vc_rows - b,
1912 vc->vc_cols);
1913 ywrap_down(vc, count);
1914 if (t > 0)
1915 fbcon_bmove(vc, count, 0, 0, 0, t,
1916 vc->vc_cols);
1917 } else if (info->flags & FBINFO_READS_FAST)
1918 fbcon_bmove(vc, t, 0, t + count, 0,
1919 b - t - count, vc->vc_cols);
1920 else
1921 goto redraw_down;
1922 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1923 break;
1924
1925 case SCROLL_PAN_MOVE:
1926 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1927 && ((!scroll_partial && (b - t == vc->vc_rows))
1928 || (scroll_partial
1929 && (b - t - count >
1930 3 * vc->vc_rows >> 2)))) {
1931 if (vc->vc_rows - b > 0)
1932 fbcon_bmove(vc, b, 0, b - count, 0,
1933 vc->vc_rows - b,
1934 vc->vc_cols);
1935 ypan_down(vc, count);
1936 if (t > 0)
1937 fbcon_bmove(vc, count, 0, 0, 0, t,
1938 vc->vc_cols);
1939 } else if (info->flags & FBINFO_READS_FAST)
1940 fbcon_bmove(vc, t, 0, t + count, 0,
1941 b - t - count, vc->vc_cols);
1942 else
1943 goto redraw_down;
1944 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945 break;
1946
1947 case SCROLL_PAN_REDRAW:
1948 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1949 && ((!scroll_partial && (b - t == vc->vc_rows))
1950 || (scroll_partial
1951 && (b - t - count >
1952 3 * vc->vc_rows >> 2)))) {
1953 if (vc->vc_rows - b > 0)
1954 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1955 b - count);
1956 ypan_down_redraw(vc, t, count);
1957 if (t > 0)
1958 fbcon_redraw_move(vc, p, count, t, 0);
1959 } else
1960 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1961 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1962 break;
1963
1964 case SCROLL_REDRAW:
1965 redraw_down:
1966 fbcon_redraw(vc, p, b - 1, b - t - count,
1967 -count * vc->vc_cols);
1968 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1969 scr_memsetw((unsigned short *) (vc->vc_origin +
1970 vc->vc_size_row *
1971 t),
1972 vc->vc_video_erase_char,
1973 vc->vc_size_row * count);
1974 return 1;
1975 }
1976 }
1977 return 0;
1978 }
1979
1980
1981 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1982 int height, int width)
1983 {
1984 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1985 struct display *p = &fb_display[vc->vc_num];
1986
1987 if (fbcon_is_inactive(vc, info))
1988 return;
1989
1990 if (!width || !height)
1991 return;
1992
1993 /* Split blits that cross physical y_wrap case.
1994 * Pathological case involves 4 blits, better to use recursive
1995 * code rather than unrolled case
1996 *
1997 * Recursive invocations don't need to erase the cursor over and
1998 * over again, so we use fbcon_bmove_rec()
1999 */
2000 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2001 p->vrows - p->yscroll);
2002 }
2003
2004 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2005 int dy, int dx, int height, int width, u_int y_break)
2006 {
2007 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2008 struct fbcon_ops *ops = info->fbcon_par;
2009 u_int b;
2010
2011 if (sy < y_break && sy + height > y_break) {
2012 b = y_break - sy;
2013 if (dy < sy) { /* Avoid trashing self */
2014 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2015 y_break);
2016 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2017 height - b, width, y_break);
2018 } else {
2019 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2020 height - b, width, y_break);
2021 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2022 y_break);
2023 }
2024 return;
2025 }
2026
2027 if (dy < y_break && dy + height > y_break) {
2028 b = y_break - dy;
2029 if (dy < sy) { /* Avoid trashing self */
2030 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2031 y_break);
2032 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2033 height - b, width, y_break);
2034 } else {
2035 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2036 height - b, width, y_break);
2037 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2038 y_break);
2039 }
2040 return;
2041 }
2042 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2043 height, width);
2044 }
2045
2046 static void updatescrollmode(struct display *p,
2047 struct fb_info *info,
2048 struct vc_data *vc)
2049 {
2050 struct fbcon_ops *ops = info->fbcon_par;
2051 int fh = vc->vc_font.height;
2052 int cap = info->flags;
2053 u16 t = 0;
2054 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2055 info->fix.xpanstep);
2056 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2057 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2058 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2059 info->var.xres_virtual);
2060 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2061 divides(ypan, vc->vc_font.height) && vyres > yres;
2062 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2063 divides(ywrap, vc->vc_font.height) &&
2064 divides(vc->vc_font.height, vyres) &&
2065 divides(vc->vc_font.height, yres);
2066 int reading_fast = cap & FBINFO_READS_FAST;
2067 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2068 !(cap & FBINFO_HWACCEL_DISABLED);
2069 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2070 !(cap & FBINFO_HWACCEL_DISABLED);
2071
2072 p->vrows = vyres/fh;
2073 if (yres > (fh * (vc->vc_rows + 1)))
2074 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2075 if ((yres % fh) && (vyres % fh < yres % fh))
2076 p->vrows--;
2077
2078 if (good_wrap || good_pan) {
2079 if (reading_fast || fast_copyarea)
2080 p->scrollmode = good_wrap ?
2081 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2082 else
2083 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2084 SCROLL_PAN_REDRAW;
2085 } else {
2086 if (reading_fast || (fast_copyarea && !fast_imageblit))
2087 p->scrollmode = SCROLL_MOVE;
2088 else
2089 p->scrollmode = SCROLL_REDRAW;
2090 }
2091 }
2092
2093 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2094 unsigned int height, unsigned int user)
2095 {
2096 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2097 struct fbcon_ops *ops = info->fbcon_par;
2098 struct display *p = &fb_display[vc->vc_num];
2099 struct fb_var_screeninfo var = info->var;
2100 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2101
2102 virt_w = FBCON_SWAP(ops->rotate, width, height);
2103 virt_h = FBCON_SWAP(ops->rotate, height, width);
2104 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2105 vc->vc_font.height);
2106 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2107 vc->vc_font.width);
2108 var.xres = virt_w * virt_fw;
2109 var.yres = virt_h * virt_fh;
2110 x_diff = info->var.xres - var.xres;
2111 y_diff = info->var.yres - var.yres;
2112 if (x_diff < 0 || x_diff > virt_fw ||
2113 y_diff < 0 || y_diff > virt_fh) {
2114 const struct fb_videomode *mode;
2115
2116 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2117 mode = fb_find_best_mode(&var, &info->modelist);
2118 if (mode == NULL)
2119 return -EINVAL;
2120 display_to_var(&var, p);
2121 fb_videomode_to_var(&var, mode);
2122
2123 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2124 return -EINVAL;
2125
2126 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2127 if (CON_IS_VISIBLE(vc)) {
2128 var.activate = FB_ACTIVATE_NOW |
2129 FB_ACTIVATE_FORCE;
2130 fb_set_var(info, &var);
2131 }
2132 var_to_display(p, &info->var, info);
2133 ops->var = info->var;
2134 }
2135 updatescrollmode(p, info, vc);
2136 return 0;
2137 }
2138
2139 static int fbcon_switch(struct vc_data *vc)
2140 {
2141 struct fb_info *info, *old_info = NULL;
2142 struct fbcon_ops *ops;
2143 struct display *p = &fb_display[vc->vc_num];
2144 struct fb_var_screeninfo var;
2145 int i, ret, prev_console, charcnt = 256;
2146
2147 info = registered_fb[con2fb_map[vc->vc_num]];
2148 ops = info->fbcon_par;
2149
2150 if (softback_top) {
2151 if (softback_lines)
2152 fbcon_set_origin(vc);
2153 softback_top = softback_curr = softback_in = softback_buf;
2154 softback_lines = 0;
2155 fbcon_update_softback(vc);
2156 }
2157
2158 if (logo_shown >= 0) {
2159 struct vc_data *conp2 = vc_cons[logo_shown].d;
2160
2161 if (conp2->vc_top == logo_lines
2162 && conp2->vc_bottom == conp2->vc_rows)
2163 conp2->vc_top = 0;
2164 logo_shown = FBCON_LOGO_CANSHOW;
2165 }
2166
2167 prev_console = ops->currcon;
2168 if (prev_console != -1)
2169 old_info = registered_fb[con2fb_map[prev_console]];
2170 /*
2171 * FIXME: If we have multiple fbdev's loaded, we need to
2172 * update all info->currcon. Perhaps, we can place this
2173 * in a centralized structure, but this might break some
2174 * drivers.
2175 *
2176 * info->currcon = vc->vc_num;
2177 */
2178 for (i = 0; i < FB_MAX; i++) {
2179 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2180 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2181
2182 o->currcon = vc->vc_num;
2183 }
2184 }
2185 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2186 display_to_var(&var, p);
2187 var.activate = FB_ACTIVATE_NOW;
2188
2189 /*
2190 * make sure we don't unnecessarily trip the memcmp()
2191 * in fb_set_var()
2192 */
2193 info->var.activate = var.activate;
2194 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2195 fb_set_var(info, &var);
2196 ops->var = info->var;
2197
2198 if (old_info != NULL && (old_info != info ||
2199 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2200 if (info->fbops->fb_set_par) {
2201 ret = info->fbops->fb_set_par(info);
2202
2203 if (ret)
2204 printk(KERN_ERR "fbcon_switch: detected "
2205 "unhandled fb_set_par error, "
2206 "error code %d\n", ret);
2207 }
2208
2209 if (old_info != info)
2210 fbcon_del_cursor_timer(old_info);
2211 }
2212
2213 if (fbcon_is_inactive(vc, info) ||
2214 ops->blank_state != FB_BLANK_UNBLANK)
2215 fbcon_del_cursor_timer(info);
2216 else
2217 fbcon_add_cursor_timer(info);
2218
2219 set_blitting_type(vc, info);
2220 ops->cursor_reset = 1;
2221
2222 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2223 ops->rotate = FB_ROTATE_UR;
2224 set_blitting_type(vc, info);
2225 }
2226
2227 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2228 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2229
2230 if (p->userfont)
2231 charcnt = FNTCHARCNT(vc->vc_font.data);
2232
2233 if (charcnt > 256)
2234 vc->vc_complement_mask <<= 1;
2235
2236 updatescrollmode(p, info, vc);
2237
2238 switch (p->scrollmode) {
2239 case SCROLL_WRAP_MOVE:
2240 scrollback_phys_max = p->vrows - vc->vc_rows;
2241 break;
2242 case SCROLL_PAN_MOVE:
2243 case SCROLL_PAN_REDRAW:
2244 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2245 if (scrollback_phys_max < 0)
2246 scrollback_phys_max = 0;
2247 break;
2248 default:
2249 scrollback_phys_max = 0;
2250 break;
2251 }
2252
2253 scrollback_max = 0;
2254 scrollback_current = 0;
2255
2256 if (!fbcon_is_inactive(vc, info)) {
2257 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2258 ops->update_start(info);
2259 }
2260
2261 fbcon_set_palette(vc, color_table);
2262 fbcon_clear_margins(vc, 0);
2263
2264 if (logo_shown == FBCON_LOGO_DRAW) {
2265
2266 logo_shown = fg_console;
2267 /* This is protected above by initmem_freed */
2268 fb_show_logo(info, ops->rotate);
2269 update_region(vc,
2270 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2271 vc->vc_size_row * (vc->vc_bottom -
2272 vc->vc_top) / 2);
2273 return 0;
2274 }
2275 return 1;
2276 }
2277
2278 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2279 int blank)
2280 {
2281 struct fb_event event;
2282
2283 if (blank) {
2284 unsigned short charmask = vc->vc_hi_font_mask ?
2285 0x1ff : 0xff;
2286 unsigned short oldc;
2287
2288 oldc = vc->vc_video_erase_char;
2289 vc->vc_video_erase_char &= charmask;
2290 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2291 vc->vc_video_erase_char = oldc;
2292 }
2293
2294
2295 if (!lock_fb_info(info))
2296 return;
2297 event.info = info;
2298 event.data = &blank;
2299 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2300 unlock_fb_info(info);
2301 }
2302
2303 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2304 {
2305 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2306 struct fbcon_ops *ops = info->fbcon_par;
2307
2308 if (mode_switch) {
2309 struct fb_var_screeninfo var = info->var;
2310
2311 ops->graphics = 1;
2312
2313 if (!blank) {
2314 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2315 fb_set_var(info, &var);
2316 ops->graphics = 0;
2317 ops->var = info->var;
2318 }
2319 }
2320
2321 if (!fbcon_is_inactive(vc, info)) {
2322 if (ops->blank_state != blank) {
2323 ops->blank_state = blank;
2324 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2325 ops->cursor_flash = (!blank);
2326
2327 if (!(info->flags & FBINFO_MISC_USEREVENT))
2328 if (fb_blank(info, blank))
2329 fbcon_generic_blank(vc, info, blank);
2330 }
2331
2332 if (!blank)
2333 update_screen(vc);
2334 }
2335
2336 if (mode_switch || fbcon_is_inactive(vc, info) ||
2337 ops->blank_state != FB_BLANK_UNBLANK)
2338 fbcon_del_cursor_timer(info);
2339 else
2340 fbcon_add_cursor_timer(info);
2341
2342 return 0;
2343 }
2344
2345 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2346 {
2347 u8 *fontdata = vc->vc_font.data;
2348 u8 *data = font->data;
2349 int i, j;
2350
2351 font->width = vc->vc_font.width;
2352 font->height = vc->vc_font.height;
2353 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2354 if (!font->data)
2355 return 0;
2356
2357 if (font->width <= 8) {
2358 j = vc->vc_font.height;
2359 for (i = 0; i < font->charcount; i++) {
2360 memcpy(data, fontdata, j);
2361 memset(data + j, 0, 32 - j);
2362 data += 32;
2363 fontdata += j;
2364 }
2365 } else if (font->width <= 16) {
2366 j = vc->vc_font.height * 2;
2367 for (i = 0; i < font->charcount; i++) {
2368 memcpy(data, fontdata, j);
2369 memset(data + j, 0, 64 - j);
2370 data += 64;
2371 fontdata += j;
2372 }
2373 } else if (font->width <= 24) {
2374 for (i = 0; i < font->charcount; i++) {
2375 for (j = 0; j < vc->vc_font.height; j++) {
2376 *data++ = fontdata[0];
2377 *data++ = fontdata[1];
2378 *data++ = fontdata[2];
2379 fontdata += sizeof(u32);
2380 }
2381 memset(data, 0, 3 * (32 - j));
2382 data += 3 * (32 - j);
2383 }
2384 } else {
2385 j = vc->vc_font.height * 4;
2386 for (i = 0; i < font->charcount; i++) {
2387 memcpy(data, fontdata, j);
2388 memset(data + j, 0, 128 - j);
2389 data += 128;
2390 fontdata += j;
2391 }
2392 }
2393 return 0;
2394 }
2395
2396 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2397 const u8 * data, int userfont)
2398 {
2399 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2400 struct fbcon_ops *ops = info->fbcon_par;
2401 struct display *p = &fb_display[vc->vc_num];
2402 int resize;
2403 int cnt;
2404 char *old_data = NULL;
2405
2406 if (CON_IS_VISIBLE(vc) && softback_lines)
2407 fbcon_set_origin(vc);
2408
2409 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2410 if (p->userfont)
2411 old_data = vc->vc_font.data;
2412 if (userfont)
2413 cnt = FNTCHARCNT(data);
2414 else
2415 cnt = 256;
2416 vc->vc_font.data = (void *)(p->fontdata = data);
2417 if ((p->userfont = userfont))
2418 REFCOUNT(data)++;
2419 vc->vc_font.width = w;
2420 vc->vc_font.height = h;
2421 if (vc->vc_hi_font_mask && cnt == 256) {
2422 vc->vc_hi_font_mask = 0;
2423 if (vc->vc_can_do_color) {
2424 vc->vc_complement_mask >>= 1;
2425 vc->vc_s_complement_mask >>= 1;
2426 }
2427
2428 /* ++Edmund: reorder the attribute bits */
2429 if (vc->vc_can_do_color) {
2430 unsigned short *cp =
2431 (unsigned short *) vc->vc_origin;
2432 int count = vc->vc_screenbuf_size / 2;
2433 unsigned short c;
2434 for (; count > 0; count--, cp++) {
2435 c = scr_readw(cp);
2436 scr_writew(((c & 0xfe00) >> 1) |
2437 (c & 0xff), cp);
2438 }
2439 c = vc->vc_video_erase_char;
2440 vc->vc_video_erase_char =
2441 ((c & 0xfe00) >> 1) | (c & 0xff);
2442 vc->vc_attr >>= 1;
2443 }
2444 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2445 vc->vc_hi_font_mask = 0x100;
2446 if (vc->vc_can_do_color) {
2447 vc->vc_complement_mask <<= 1;
2448 vc->vc_s_complement_mask <<= 1;
2449 }
2450
2451 /* ++Edmund: reorder the attribute bits */
2452 {
2453 unsigned short *cp =
2454 (unsigned short *) vc->vc_origin;
2455 int count = vc->vc_screenbuf_size / 2;
2456 unsigned short c;
2457 for (; count > 0; count--, cp++) {
2458 unsigned short newc;
2459 c = scr_readw(cp);
2460 if (vc->vc_can_do_color)
2461 newc =
2462 ((c & 0xff00) << 1) | (c &
2463 0xff);
2464 else
2465 newc = c & ~0x100;
2466 scr_writew(newc, cp);
2467 }
2468 c = vc->vc_video_erase_char;
2469 if (vc->vc_can_do_color) {
2470 vc->vc_video_erase_char =
2471 ((c & 0xff00) << 1) | (c & 0xff);
2472 vc->vc_attr <<= 1;
2473 } else
2474 vc->vc_video_erase_char = c & ~0x100;
2475 }
2476
2477 }
2478
2479 if (resize) {
2480 int cols, rows;
2481
2482 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2483 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2484 cols /= w;
2485 rows /= h;
2486 vc_resize(vc, cols, rows);
2487 if (CON_IS_VISIBLE(vc) && softback_buf)
2488 fbcon_update_softback(vc);
2489 } else if (CON_IS_VISIBLE(vc)
2490 && vc->vc_mode == KD_TEXT) {
2491 fbcon_clear_margins(vc, 0);
2492 update_screen(vc);
2493 }
2494
2495 if (old_data && (--REFCOUNT(old_data) == 0))
2496 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2497 return 0;
2498 }
2499
2500 static int fbcon_copy_font(struct vc_data *vc, int con)
2501 {
2502 struct display *od = &fb_display[con];
2503 struct console_font *f = &vc->vc_font;
2504
2505 if (od->fontdata == f->data)
2506 return 0; /* already the same font... */
2507 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2508 }
2509
2510 /*
2511 * User asked to set font; we are guaranteed that
2512 * a) width and height are in range 1..32
2513 * b) charcount does not exceed 512
2514 * but lets not assume that, since someone might someday want to use larger
2515 * fonts. And charcount of 512 is small for unicode support.
2516 *
2517 * However, user space gives the font in 32 rows , regardless of
2518 * actual font height. So a new API is needed if support for larger fonts
2519 * is ever implemented.
2520 */
2521
2522 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2523 {
2524 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2525 unsigned charcount = font->charcount;
2526 int w = font->width;
2527 int h = font->height;
2528 int size;
2529 int i, csum;
2530 u8 *new_data, *data = font->data;
2531 int pitch = (font->width+7) >> 3;
2532
2533 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2534 * If not this check should be changed to charcount < 256 */
2535 if (charcount != 256 && charcount != 512)
2536 return -EINVAL;
2537
2538 /* Make sure drawing engine can handle the font */
2539 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2540 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2541 return -EINVAL;
2542
2543 /* Make sure driver can handle the font length */
2544 if (fbcon_invalid_charcount(info, charcount))
2545 return -EINVAL;
2546
2547 size = h * pitch * charcount;
2548
2549 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2550
2551 if (!new_data)
2552 return -ENOMEM;
2553
2554 new_data += FONT_EXTRA_WORDS * sizeof(int);
2555 FNTSIZE(new_data) = size;
2556 FNTCHARCNT(new_data) = charcount;
2557 REFCOUNT(new_data) = 0; /* usage counter */
2558 for (i=0; i< charcount; i++) {
2559 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2560 }
2561
2562 /* Since linux has a nice crc32 function use it for counting font
2563 * checksums. */
2564 csum = crc32(0, new_data, size);
2565
2566 FNTSUM(new_data) = csum;
2567 /* Check if the same font is on some other console already */
2568 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2569 struct vc_data *tmp = vc_cons[i].d;
2570
2571 if (fb_display[i].userfont &&
2572 fb_display[i].fontdata &&
2573 FNTSUM(fb_display[i].fontdata) == csum &&
2574 FNTSIZE(fb_display[i].fontdata) == size &&
2575 tmp->vc_font.width == w &&
2576 !memcmp(fb_display[i].fontdata, new_data, size)) {
2577 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2578 new_data = (u8 *)fb_display[i].fontdata;
2579 break;
2580 }
2581 }
2582 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2583 }
2584
2585 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2586 {
2587 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2588 const struct font_desc *f;
2589
2590 if (!name)
2591 f = get_default_font(info->var.xres, info->var.yres,
2592 info->pixmap.blit_x, info->pixmap.blit_y);
2593 else if (!(f = find_font(name)))
2594 return -ENOENT;
2595
2596 font->width = f->width;
2597 font->height = f->height;
2598 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2599 }
2600
2601 static u16 palette_red[16];
2602 static u16 palette_green[16];
2603 static u16 palette_blue[16];
2604
2605 static struct fb_cmap palette_cmap = {
2606 0, 16, palette_red, palette_green, palette_blue, NULL
2607 };
2608
2609 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2610 {
2611 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2612 int i, j, k, depth;
2613 u8 val;
2614
2615 if (fbcon_is_inactive(vc, info))
2616 return -EINVAL;
2617
2618 if (!CON_IS_VISIBLE(vc))
2619 return 0;
2620
2621 depth = fb_get_color_depth(&info->var, &info->fix);
2622 if (depth > 3) {
2623 for (i = j = 0; i < 16; i++) {
2624 k = table[i];
2625 val = vc->vc_palette[j++];
2626 palette_red[k] = (val << 8) | val;
2627 val = vc->vc_palette[j++];
2628 palette_green[k] = (val << 8) | val;
2629 val = vc->vc_palette[j++];
2630 palette_blue[k] = (val << 8) | val;
2631 }
2632 palette_cmap.len = 16;
2633 palette_cmap.start = 0;
2634 /*
2635 * If framebuffer is capable of less than 16 colors,
2636 * use default palette of fbcon.
2637 */
2638 } else
2639 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2640
2641 return fb_set_cmap(&palette_cmap, info);
2642 }
2643
2644 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2645 {
2646 unsigned long p;
2647 int line;
2648
2649 if (vc->vc_num != fg_console || !softback_lines)
2650 return (u16 *) (vc->vc_origin + offset);
2651 line = offset / vc->vc_size_row;
2652 if (line >= softback_lines)
2653 return (u16 *) (vc->vc_origin + offset -
2654 softback_lines * vc->vc_size_row);
2655 p = softback_curr + offset;
2656 if (p >= softback_end)
2657 p += softback_buf - softback_end;
2658 return (u16 *) p;
2659 }
2660
2661 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2662 int *px, int *py)
2663 {
2664 unsigned long ret;
2665 int x, y;
2666
2667 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2668 unsigned long offset = (pos - vc->vc_origin) / 2;
2669
2670 x = offset % vc->vc_cols;
2671 y = offset / vc->vc_cols;
2672 if (vc->vc_num == fg_console)
2673 y += softback_lines;
2674 ret = pos + (vc->vc_cols - x) * 2;
2675 } else if (vc->vc_num == fg_console && softback_lines) {
2676 unsigned long offset = pos - softback_curr;
2677
2678 if (pos < softback_curr)
2679 offset += softback_end - softback_buf;
2680 offset /= 2;
2681 x = offset % vc->vc_cols;
2682 y = offset / vc->vc_cols;
2683 ret = pos + (vc->vc_cols - x) * 2;
2684 if (ret == softback_end)
2685 ret = softback_buf;
2686 if (ret == softback_in)
2687 ret = vc->vc_origin;
2688 } else {
2689 /* Should not happen */
2690 x = y = 0;
2691 ret = vc->vc_origin;
2692 }
2693 if (px)
2694 *px = x;
2695 if (py)
2696 *py = y;
2697 return ret;
2698 }
2699
2700 /* As we might be inside of softback, we may work with non-contiguous buffer,
2701 that's why we have to use a separate routine. */
2702 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2703 {
2704 while (cnt--) {
2705 u16 a = scr_readw(p);
2706 if (!vc->vc_can_do_color)
2707 a ^= 0x0800;
2708 else if (vc->vc_hi_font_mask == 0x100)
2709 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2710 (((a) & 0x0e00) << 4);
2711 else
2712 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2713 (((a) & 0x0700) << 4);
2714 scr_writew(a, p++);
2715 if (p == (u16 *) softback_end)
2716 p = (u16 *) softback_buf;
2717 if (p == (u16 *) softback_in)
2718 p = (u16 *) vc->vc_origin;
2719 }
2720 }
2721
2722 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2723 {
2724 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2725 struct fbcon_ops *ops = info->fbcon_par;
2726 struct display *disp = &fb_display[fg_console];
2727 int offset, limit, scrollback_old;
2728
2729 if (softback_top) {
2730 if (vc->vc_num != fg_console)
2731 return 0;
2732 if (vc->vc_mode != KD_TEXT || !lines)
2733 return 0;
2734 if (logo_shown >= 0) {
2735 struct vc_data *conp2 = vc_cons[logo_shown].d;
2736
2737 if (conp2->vc_top == logo_lines
2738 && conp2->vc_bottom == conp2->vc_rows)
2739 conp2->vc_top = 0;
2740 if (logo_shown == vc->vc_num) {
2741 unsigned long p, q;
2742 int i;
2743
2744 p = softback_in;
2745 q = vc->vc_origin +
2746 logo_lines * vc->vc_size_row;
2747 for (i = 0; i < logo_lines; i++) {
2748 if (p == softback_top)
2749 break;
2750 if (p == softback_buf)
2751 p = softback_end;
2752 p -= vc->vc_size_row;
2753 q -= vc->vc_size_row;
2754 scr_memcpyw((u16 *) q, (u16 *) p,
2755 vc->vc_size_row);
2756 }
2757 softback_in = softback_curr = p;
2758 update_region(vc, vc->vc_origin,
2759 logo_lines * vc->vc_cols);
2760 }
2761 logo_shown = FBCON_LOGO_CANSHOW;
2762 }
2763 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2764 fbcon_redraw_softback(vc, disp, lines);
2765 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2766 return 0;
2767 }
2768
2769 if (!scrollback_phys_max)
2770 return -ENOSYS;
2771
2772 scrollback_old = scrollback_current;
2773 scrollback_current -= lines;
2774 if (scrollback_current < 0)
2775 scrollback_current = 0;
2776 else if (scrollback_current > scrollback_max)
2777 scrollback_current = scrollback_max;
2778 if (scrollback_current == scrollback_old)
2779 return 0;
2780
2781 if (fbcon_is_inactive(vc, info))
2782 return 0;
2783
2784 fbcon_cursor(vc, CM_ERASE);
2785
2786 offset = disp->yscroll - scrollback_current;
2787 limit = disp->vrows;
2788 switch (disp->scrollmode) {
2789 case SCROLL_WRAP_MOVE:
2790 info->var.vmode |= FB_VMODE_YWRAP;
2791 break;
2792 case SCROLL_PAN_MOVE:
2793 case SCROLL_PAN_REDRAW:
2794 limit -= vc->vc_rows;
2795 info->var.vmode &= ~FB_VMODE_YWRAP;
2796 break;
2797 }
2798 if (offset < 0)
2799 offset += limit;
2800 else if (offset >= limit)
2801 offset -= limit;
2802
2803 ops->var.xoffset = 0;
2804 ops->var.yoffset = offset * vc->vc_font.height;
2805 ops->update_start(info);
2806
2807 if (!scrollback_current)
2808 fbcon_cursor(vc, CM_DRAW);
2809 return 0;
2810 }
2811
2812 static int fbcon_set_origin(struct vc_data *vc)
2813 {
2814 if (softback_lines)
2815 fbcon_scrolldelta(vc, softback_lines);
2816 return 0;
2817 }
2818
2819 static void fbcon_suspended(struct fb_info *info)
2820 {
2821 struct vc_data *vc = NULL;
2822 struct fbcon_ops *ops = info->fbcon_par;
2823
2824 if (!ops || ops->currcon < 0)
2825 return;
2826 vc = vc_cons[ops->currcon].d;
2827
2828 /* Clear cursor, restore saved data */
2829 fbcon_cursor(vc, CM_ERASE);
2830 }
2831
2832 static void fbcon_resumed(struct fb_info *info)
2833 {
2834 struct vc_data *vc;
2835 struct fbcon_ops *ops = info->fbcon_par;
2836
2837 if (!ops || ops->currcon < 0)
2838 return;
2839 vc = vc_cons[ops->currcon].d;
2840
2841 update_screen(vc);
2842 }
2843
2844 static void fbcon_modechanged(struct fb_info *info)
2845 {
2846 struct fbcon_ops *ops = info->fbcon_par;
2847 struct vc_data *vc;
2848 struct display *p;
2849 int rows, cols;
2850
2851 if (!ops || ops->currcon < 0)
2852 return;
2853 vc = vc_cons[ops->currcon].d;
2854 if (vc->vc_mode != KD_TEXT ||
2855 registered_fb[con2fb_map[ops->currcon]] != info)
2856 return;
2857
2858 p = &fb_display[vc->vc_num];
2859 set_blitting_type(vc, info);
2860
2861 if (CON_IS_VISIBLE(vc)) {
2862 var_to_display(p, &info->var, info);
2863 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2864 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2865 cols /= vc->vc_font.width;
2866 rows /= vc->vc_font.height;
2867 vc_resize(vc, cols, rows);
2868 updatescrollmode(p, info, vc);
2869 scrollback_max = 0;
2870 scrollback_current = 0;
2871
2872 if (!fbcon_is_inactive(vc, info)) {
2873 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2874 ops->update_start(info);
2875 }
2876
2877 fbcon_set_palette(vc, color_table);
2878 update_screen(vc);
2879 if (softback_buf)
2880 fbcon_update_softback(vc);
2881 }
2882 }
2883
2884 static void fbcon_set_all_vcs(struct fb_info *info)
2885 {
2886 struct fbcon_ops *ops = info->fbcon_par;
2887 struct vc_data *vc;
2888 struct display *p;
2889 int i, rows, cols, fg = -1;
2890
2891 if (!ops || ops->currcon < 0)
2892 return;
2893
2894 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2895 vc = vc_cons[i].d;
2896 if (!vc || vc->vc_mode != KD_TEXT ||
2897 registered_fb[con2fb_map[i]] != info)
2898 continue;
2899
2900 if (CON_IS_VISIBLE(vc)) {
2901 fg = i;
2902 continue;
2903 }
2904
2905 p = &fb_display[vc->vc_num];
2906 set_blitting_type(vc, info);
2907 var_to_display(p, &info->var, info);
2908 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2909 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2910 cols /= vc->vc_font.width;
2911 rows /= vc->vc_font.height;
2912 vc_resize(vc, cols, rows);
2913 }
2914
2915 if (fg != -1)
2916 fbcon_modechanged(info);
2917 }
2918
2919 static int fbcon_mode_deleted(struct fb_info *info,
2920 struct fb_videomode *mode)
2921 {
2922 struct fb_info *fb_info;
2923 struct display *p;
2924 int i, j, found = 0;
2925
2926 /* before deletion, ensure that mode is not in use */
2927 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2928 j = con2fb_map[i];
2929 if (j == -1)
2930 continue;
2931 fb_info = registered_fb[j];
2932 if (fb_info != info)
2933 continue;
2934 p = &fb_display[i];
2935 if (!p || !p->mode)
2936 continue;
2937 if (fb_mode_is_equal(p->mode, mode)) {
2938 found = 1;
2939 break;
2940 }
2941 }
2942 return found;
2943 }
2944
2945 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2946 static int fbcon_unbind(void)
2947 {
2948 int ret;
2949
2950 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2951 fbcon_is_default);
2952
2953 if (!ret)
2954 fbcon_has_console_bind = 0;
2955
2956 return ret;
2957 }
2958 #else
2959 static inline int fbcon_unbind(void)
2960 {
2961 return -EINVAL;
2962 }
2963 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2964
2965 static int fbcon_fb_unbind(int idx)
2966 {
2967 int i, new_idx = -1, ret = 0;
2968
2969 if (!fbcon_has_console_bind)
2970 return 0;
2971
2972 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2973 if (con2fb_map[i] != idx &&
2974 con2fb_map[i] != -1) {
2975 new_idx = i;
2976 break;
2977 }
2978 }
2979
2980 if (new_idx != -1) {
2981 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2982 if (con2fb_map[i] == idx)
2983 set_con2fb_map(i, new_idx, 0);
2984 }
2985 } else
2986 ret = fbcon_unbind();
2987
2988 return ret;
2989 }
2990
2991 static int fbcon_fb_unregistered(struct fb_info *info)
2992 {
2993 int i, idx;
2994
2995 idx = info->node;
2996 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997 if (con2fb_map[i] == idx)
2998 con2fb_map[i] = -1;
2999 }
3000
3001 if (idx == info_idx) {
3002 info_idx = -1;
3003
3004 for (i = 0; i < FB_MAX; i++) {
3005 if (registered_fb[i] != NULL) {
3006 info_idx = i;
3007 break;
3008 }
3009 }
3010 }
3011
3012 if (info_idx != -1) {
3013 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3014 if (con2fb_map[i] == -1)
3015 con2fb_map[i] = info_idx;
3016 }
3017 }
3018
3019 if (primary_device == idx)
3020 primary_device = -1;
3021
3022 if (!num_registered_fb)
3023 unregister_con_driver(&fb_con);
3024
3025 return 0;
3026 }
3027
3028 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3029 static void fbcon_select_primary(struct fb_info *info)
3030 {
3031 if (!map_override && primary_device == -1 &&
3032 fb_is_primary_device(info)) {
3033 int i;
3034
3035 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3036 info->fix.id, info->node);
3037 primary_device = info->node;
3038
3039 for (i = first_fb_vc; i <= last_fb_vc; i++)
3040 con2fb_map_boot[i] = primary_device;
3041
3042 if (con_is_bound(&fb_con)) {
3043 printk(KERN_INFO "fbcon: Remapping primary device, "
3044 "fb%i, to tty %i-%i\n", info->node,
3045 first_fb_vc + 1, last_fb_vc + 1);
3046 info_idx = primary_device;
3047 }
3048 }
3049
3050 }
3051 #else
3052 static inline void fbcon_select_primary(struct fb_info *info)
3053 {
3054 return;
3055 }
3056 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3057
3058 static int fbcon_fb_registered(struct fb_info *info)
3059 {
3060 int ret = 0, i, idx;
3061
3062 idx = info->node;
3063 fbcon_select_primary(info);
3064
3065 if (info_idx == -1) {
3066 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3067 if (con2fb_map_boot[i] == idx) {
3068 info_idx = idx;
3069 break;
3070 }
3071 }
3072
3073 if (info_idx != -1)
3074 ret = fbcon_takeover(1);
3075 } else {
3076 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3077 if (con2fb_map_boot[i] == idx)
3078 set_con2fb_map(i, idx, 0);
3079 }
3080 }
3081
3082 return ret;
3083 }
3084
3085 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3086 {
3087 struct fbcon_ops *ops = info->fbcon_par;
3088 struct vc_data *vc;
3089
3090 if (!ops || ops->currcon < 0)
3091 return;
3092
3093 vc = vc_cons[ops->currcon].d;
3094 if (vc->vc_mode != KD_TEXT ||
3095 registered_fb[con2fb_map[ops->currcon]] != info)
3096 return;
3097
3098 if (CON_IS_VISIBLE(vc)) {
3099 if (blank)
3100 do_blank_screen(0);
3101 else
3102 do_unblank_screen(0);
3103 }
3104 ops->blank_state = blank;
3105 }
3106
3107 static void fbcon_new_modelist(struct fb_info *info)
3108 {
3109 int i;
3110 struct vc_data *vc;
3111 struct fb_var_screeninfo var;
3112 const struct fb_videomode *mode;
3113
3114 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3115 if (registered_fb[con2fb_map[i]] != info)
3116 continue;
3117 if (!fb_display[i].mode)
3118 continue;
3119 vc = vc_cons[i].d;
3120 display_to_var(&var, &fb_display[i]);
3121 mode = fb_find_nearest_mode(fb_display[i].mode,
3122 &info->modelist);
3123 fb_videomode_to_var(&var, mode);
3124 fbcon_set_disp(info, &var, vc->vc_num);
3125 }
3126 }
3127
3128 static void fbcon_get_requirement(struct fb_info *info,
3129 struct fb_blit_caps *caps)
3130 {
3131 struct vc_data *vc;
3132 struct display *p;
3133
3134 if (caps->flags) {
3135 int i, charcnt;
3136
3137 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3138 vc = vc_cons[i].d;
3139 if (vc && vc->vc_mode == KD_TEXT &&
3140 info->node == con2fb_map[i]) {
3141 p = &fb_display[i];
3142 caps->x |= 1 << (vc->vc_font.width - 1);
3143 caps->y |= 1 << (vc->vc_font.height - 1);
3144 charcnt = (p->userfont) ?
3145 FNTCHARCNT(p->fontdata) : 256;
3146 if (caps->len < charcnt)
3147 caps->len = charcnt;
3148 }
3149 }
3150 } else {
3151 vc = vc_cons[fg_console].d;
3152
3153 if (vc && vc->vc_mode == KD_TEXT &&
3154 info->node == con2fb_map[fg_console]) {
3155 p = &fb_display[fg_console];
3156 caps->x = 1 << (vc->vc_font.width - 1);
3157 caps->y = 1 << (vc->vc_font.height - 1);
3158 caps->len = (p->userfont) ?
3159 FNTCHARCNT(p->fontdata) : 256;
3160 }
3161 }
3162 }
3163
3164 static int fbcon_event_notify(struct notifier_block *self,
3165 unsigned long action, void *data)
3166 {
3167 struct fb_event *event = data;
3168 struct fb_info *info = event->info;
3169 struct fb_videomode *mode;
3170 struct fb_con2fbmap *con2fb;
3171 struct fb_blit_caps *caps;
3172 int idx, ret = 0;
3173
3174 /*
3175 * ignore all events except driver registration and deregistration
3176 * if fbcon is not active
3177 */
3178 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3179 action == FB_EVENT_FB_UNREGISTERED))
3180 goto done;
3181
3182 switch(action) {
3183 case FB_EVENT_SUSPEND:
3184 fbcon_suspended(info);
3185 break;
3186 case FB_EVENT_RESUME:
3187 fbcon_resumed(info);
3188 break;
3189 case FB_EVENT_MODE_CHANGE:
3190 fbcon_modechanged(info);
3191 break;
3192 case FB_EVENT_MODE_CHANGE_ALL:
3193 fbcon_set_all_vcs(info);
3194 break;
3195 case FB_EVENT_MODE_DELETE:
3196 mode = event->data;
3197 ret = fbcon_mode_deleted(info, mode);
3198 break;
3199 case FB_EVENT_FB_UNBIND:
3200 idx = info->node;
3201 ret = fbcon_fb_unbind(idx);
3202 break;
3203 case FB_EVENT_FB_REGISTERED:
3204 ret = fbcon_fb_registered(info);
3205 break;
3206 case FB_EVENT_FB_UNREGISTERED:
3207 ret = fbcon_fb_unregistered(info);
3208 break;
3209 case FB_EVENT_SET_CONSOLE_MAP:
3210 con2fb = event->data;
3211 ret = set_con2fb_map(con2fb->console - 1,
3212 con2fb->framebuffer, 1);
3213 break;
3214 case FB_EVENT_GET_CONSOLE_MAP:
3215 con2fb = event->data;
3216 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3217 break;
3218 case FB_EVENT_BLANK:
3219 fbcon_fb_blanked(info, *(int *)event->data);
3220 break;
3221 case FB_EVENT_NEW_MODELIST:
3222 fbcon_new_modelist(info);
3223 break;
3224 case FB_EVENT_GET_REQ:
3225 caps = event->data;
3226 fbcon_get_requirement(info, caps);
3227 break;
3228 }
3229 done:
3230 return ret;
3231 }
3232
3233 /*
3234 * The console `switch' structure for the frame buffer based console
3235 */
3236
3237 static const struct consw fb_con = {
3238 .owner = THIS_MODULE,
3239 .con_startup = fbcon_startup,
3240 .con_init = fbcon_init,
3241 .con_deinit = fbcon_deinit,
3242 .con_clear = fbcon_clear,
3243 .con_putc = fbcon_putc,
3244 .con_putcs = fbcon_putcs,
3245 .con_cursor = fbcon_cursor,
3246 .con_scroll = fbcon_scroll,
3247 .con_bmove = fbcon_bmove,
3248 .con_switch = fbcon_switch,
3249 .con_blank = fbcon_blank,
3250 .con_font_set = fbcon_set_font,
3251 .con_font_get = fbcon_get_font,
3252 .con_font_default = fbcon_set_def_font,
3253 .con_font_copy = fbcon_copy_font,
3254 .con_set_palette = fbcon_set_palette,
3255 .con_scrolldelta = fbcon_scrolldelta,
3256 .con_set_origin = fbcon_set_origin,
3257 .con_invert_region = fbcon_invert_region,
3258 .con_screen_pos = fbcon_screen_pos,
3259 .con_getxy = fbcon_getxy,
3260 .con_resize = fbcon_resize,
3261 };
3262
3263 static struct notifier_block fbcon_event_notifier = {
3264 .notifier_call = fbcon_event_notify,
3265 };
3266
3267 static ssize_t store_rotate(struct device *device,
3268 struct device_attribute *attr, const char *buf,
3269 size_t count)
3270 {
3271 struct fb_info *info;
3272 int rotate, idx;
3273 char **last = NULL;
3274
3275 if (fbcon_has_exited)
3276 return count;
3277
3278 acquire_console_sem();
3279 idx = con2fb_map[fg_console];
3280
3281 if (idx == -1 || registered_fb[idx] == NULL)
3282 goto err;
3283
3284 info = registered_fb[idx];
3285 rotate = simple_strtoul(buf, last, 0);
3286 fbcon_rotate(info, rotate);
3287 err:
3288 release_console_sem();
3289 return count;
3290 }
3291
3292 static ssize_t store_rotate_all(struct device *device,
3293 struct device_attribute *attr,const char *buf,
3294 size_t count)
3295 {
3296 struct fb_info *info;
3297 int rotate, idx;
3298 char **last = NULL;
3299
3300 if (fbcon_has_exited)
3301 return count;
3302
3303 acquire_console_sem();
3304 idx = con2fb_map[fg_console];
3305
3306 if (idx == -1 || registered_fb[idx] == NULL)
3307 goto err;
3308
3309 info = registered_fb[idx];
3310 rotate = simple_strtoul(buf, last, 0);
3311 fbcon_rotate_all(info, rotate);
3312 err:
3313 release_console_sem();
3314 return count;
3315 }
3316
3317 static ssize_t show_rotate(struct device *device,
3318 struct device_attribute *attr,char *buf)
3319 {
3320 struct fb_info *info;
3321 int rotate = 0, idx;
3322
3323 if (fbcon_has_exited)
3324 return 0;
3325
3326 acquire_console_sem();
3327 idx = con2fb_map[fg_console];
3328
3329 if (idx == -1 || registered_fb[idx] == NULL)
3330 goto err;
3331
3332 info = registered_fb[idx];
3333 rotate = fbcon_get_rotate(info);
3334 err:
3335 release_console_sem();
3336 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3337 }
3338
3339 static ssize_t show_cursor_blink(struct device *device,
3340 struct device_attribute *attr, char *buf)
3341 {
3342 struct fb_info *info;
3343 struct fbcon_ops *ops;
3344 int idx, blink = -1;
3345
3346 if (fbcon_has_exited)
3347 return 0;
3348
3349 acquire_console_sem();
3350 idx = con2fb_map[fg_console];
3351
3352 if (idx == -1 || registered_fb[idx] == NULL)
3353 goto err;
3354
3355 info = registered_fb[idx];
3356 ops = info->fbcon_par;
3357
3358 if (!ops)
3359 goto err;
3360
3361 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3362 err:
3363 release_console_sem();
3364 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3365 }
3366
3367 static ssize_t store_cursor_blink(struct device *device,
3368 struct device_attribute *attr,
3369 const char *buf, size_t count)
3370 {
3371 struct fb_info *info;
3372 int blink, idx;
3373 char **last = NULL;
3374
3375 if (fbcon_has_exited)
3376 return count;
3377
3378 acquire_console_sem();
3379 idx = con2fb_map[fg_console];
3380
3381 if (idx == -1 || registered_fb[idx] == NULL)
3382 goto err;
3383
3384 info = registered_fb[idx];
3385
3386 if (!info->fbcon_par)
3387 goto err;
3388
3389 blink = simple_strtoul(buf, last, 0);
3390
3391 if (blink) {
3392 fbcon_cursor_noblink = 0;
3393 fbcon_add_cursor_timer(info);
3394 } else {
3395 fbcon_cursor_noblink = 1;
3396 fbcon_del_cursor_timer(info);
3397 }
3398
3399 err:
3400 release_console_sem();
3401 return count;
3402 }
3403
3404 static struct device_attribute device_attrs[] = {
3405 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3406 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3407 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3408 store_cursor_blink),
3409 };
3410
3411 static int fbcon_init_device(void)
3412 {
3413 int i, error = 0;
3414
3415 fbcon_has_sysfs = 1;
3416
3417 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3418 error = device_create_file(fbcon_device, &device_attrs[i]);
3419
3420 if (error)
3421 break;
3422 }
3423
3424 if (error) {
3425 while (--i >= 0)
3426 device_remove_file(fbcon_device, &device_attrs[i]);
3427
3428 fbcon_has_sysfs = 0;
3429 }
3430
3431 return 0;
3432 }
3433
3434 static void fbcon_start(void)
3435 {
3436 if (num_registered_fb) {
3437 int i;
3438
3439 acquire_console_sem();
3440
3441 for (i = 0; i < FB_MAX; i++) {
3442 if (registered_fb[i] != NULL) {
3443 info_idx = i;
3444 break;
3445 }
3446 }
3447
3448 release_console_sem();
3449 fbcon_takeover(0);
3450 }
3451 }
3452
3453 static void fbcon_exit(void)
3454 {
3455 struct fb_info *info;
3456 int i, j, mapped;
3457
3458 if (fbcon_has_exited)
3459 return;
3460
3461 kfree((void *)softback_buf);
3462 softback_buf = 0UL;
3463
3464 for (i = 0; i < FB_MAX; i++) {
3465 int pending;
3466
3467 mapped = 0;
3468 info = registered_fb[i];
3469
3470 if (info == NULL)
3471 continue;
3472
3473 pending = cancel_work_sync(&info->queue);
3474 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3475 "no"));
3476
3477 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3478 if (con2fb_map[j] == i)
3479 mapped = 1;
3480 }
3481
3482 if (mapped) {
3483 if (info->fbops->fb_release)
3484 info->fbops->fb_release(info, 0);
3485 module_put(info->fbops->owner);
3486
3487 if (info->fbcon_par) {
3488 struct fbcon_ops *ops = info->fbcon_par;
3489
3490 fbcon_del_cursor_timer(info);
3491 kfree(ops->cursor_src);
3492 kfree(info->fbcon_par);
3493 info->fbcon_par = NULL;
3494 }
3495
3496 if (info->queue.func == fb_flashcursor)
3497 info->queue.func = NULL;
3498 }
3499 }
3500
3501 fbcon_has_exited = 1;
3502 }
3503
3504 static int __init fb_console_init(void)
3505 {
3506 int i;
3507
3508 acquire_console_sem();
3509 fb_register_client(&fbcon_event_notifier);
3510 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3511 "fbcon");
3512
3513 if (IS_ERR(fbcon_device)) {
3514 printk(KERN_WARNING "Unable to create device "
3515 "for fbcon; errno = %ld\n",
3516 PTR_ERR(fbcon_device));
3517 fbcon_device = NULL;
3518 } else
3519 fbcon_init_device();
3520
3521 for (i = 0; i < MAX_NR_CONSOLES; i++)
3522 con2fb_map[i] = -1;
3523
3524 release_console_sem();
3525 fbcon_start();
3526 return 0;
3527 }
3528
3529 module_init(fb_console_init);
3530
3531 #ifdef MODULE
3532
3533 static void __exit fbcon_deinit_device(void)
3534 {
3535 int i;
3536
3537 if (fbcon_has_sysfs) {
3538 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3539 device_remove_file(fbcon_device, &device_attrs[i]);
3540
3541 fbcon_has_sysfs = 0;
3542 }
3543 }
3544
3545 static void __exit fb_console_exit(void)
3546 {
3547 acquire_console_sem();
3548 fb_unregister_client(&fbcon_event_notifier);
3549 fbcon_deinit_device();
3550 device_destroy(fb_class, MKDEV(0, 0));
3551 fbcon_exit();
3552 release_console_sem();
3553 unregister_con_driver(&fb_con);
3554 }
3555
3556 module_exit(fb_console_exit);
3557
3558 #endif
3559
3560 MODULE_LICENSE("GPL");
CRIS linux kernel tree