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initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / video / console / fbcon.c
blobfdefa8fd72c4da070787d95260b2744d6a9a7dab
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80
81 #include "fbcon.h"
82
83 #ifdef FBCONDEBUG
84 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
85 #else
86 # define DPRINTK(fmt, args...)
87 #endif
88
89 enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93 };
94
95 static struct display fb_display[MAX_NR_CONSOLES];
96
97 static signed char con2fb_map[MAX_NR_CONSOLES];
98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
99
100 static int logo_lines;
101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103 static int logo_shown = FBCON_LOGO_CANSHOW;
104 /* Software scrollback */
105 static int fbcon_softback_size = 32768;
106 static unsigned long softback_buf, softback_curr;
107 static unsigned long softback_in;
108 static unsigned long softback_top, softback_end;
109 static int softback_lines;
110 /* console mappings */
111 static int first_fb_vc;
112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
113 static int fbcon_is_default = 1;
114 static int fbcon_has_exited;
115 static int primary_device = -1;
116 static int fbcon_has_console_bind;
117
118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
119 static int map_override;
120
121 static inline void fbcon_map_override(void)
122 {
123 map_override = 1;
124 }
125 #else
126 static inline void fbcon_map_override(void)
127 {
128 }
129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
131 /* font data */
132 static char fontname[40];
133
134 /* current fb_info */
135 static int info_idx = -1;
136
137 /* console rotation */
138 static int initial_rotation;
139 static int fbcon_has_sysfs;
140
141 static const struct consw fb_con;
142
143 #define CM_SOFTBACK (8)
144
145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
147 static int fbcon_set_origin(struct vc_data *);
148
149 #define CURSOR_DRAW_DELAY (1)
150
151 static int vbl_cursor_cnt;
152 static int fbcon_cursor_noblink;
153
154 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
155
156 /*
157 * Interface used by the world
158 */
159
160 static const char *fbcon_startup(void);
161 static void fbcon_init(struct vc_data *vc, int init);
162 static void fbcon_deinit(struct vc_data *vc);
163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
164 int width);
165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
167 int count, int ypos, int xpos);
168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
169 static void fbcon_cursor(struct vc_data *vc, int mode);
170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
171 int count);
172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
173 int height, int width);
174 static int fbcon_switch(struct vc_data *vc);
175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
178
179 /*
180 * Internal routines
181 */
182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
184 static __inline__ void ypan_up(struct vc_data *vc, int count);
185 static __inline__ void ypan_down(struct vc_data *vc, int count);
186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
187 int dy, int dx, int height, int width, u_int y_break);
188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 int unit);
190 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
191 int line, int count, int dy);
192 static void fbcon_modechanged(struct fb_info *info);
193 static void fbcon_set_all_vcs(struct fb_info *info);
194 static void fbcon_start(void);
195 static void fbcon_exit(void);
196 static struct device *fbcon_device;
197
198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
199 static inline void fbcon_set_rotation(struct fb_info *info)
200 {
201 struct fbcon_ops *ops = info->fbcon_par;
202
203 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
204 ops->p->con_rotate < 4)
205 ops->rotate = ops->p->con_rotate;
206 else
207 ops->rotate = 0;
208 }
209
210 static void fbcon_rotate(struct fb_info *info, u32 rotate)
211 {
212 struct fbcon_ops *ops= info->fbcon_par;
213 struct fb_info *fb_info;
214
215 if (!ops || ops->currcon == -1)
216 return;
217
218 fb_info = registered_fb[con2fb_map[ops->currcon]];
219
220 if (info == fb_info) {
221 struct display *p = &fb_display[ops->currcon];
222
223 if (rotate < 4)
224 p->con_rotate = rotate;
225 else
226 p->con_rotate = 0;
227
228 fbcon_modechanged(info);
229 }
230 }
231
232 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
233 {
234 struct fbcon_ops *ops = info->fbcon_par;
235 struct vc_data *vc;
236 struct display *p;
237 int i;
238
239 if (!ops || ops->currcon < 0 || rotate > 3)
240 return;
241
242 for (i = first_fb_vc; i <= last_fb_vc; i++) {
243 vc = vc_cons[i].d;
244 if (!vc || vc->vc_mode != KD_TEXT ||
245 registered_fb[con2fb_map[i]] != info)
246 continue;
247
248 p = &fb_display[vc->vc_num];
249 p->con_rotate = rotate;
250 }
251
252 fbcon_set_all_vcs(info);
253 }
254 #else
255 static inline void fbcon_set_rotation(struct fb_info *info)
256 {
257 struct fbcon_ops *ops = info->fbcon_par;
258
259 ops->rotate = FB_ROTATE_UR;
260 }
261
262 static void fbcon_rotate(struct fb_info *info, u32 rotate)
263 {
264 return;
265 }
266
267 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
268 {
269 return;
270 }
271 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
272
273 static int fbcon_get_rotate(struct fb_info *info)
274 {
275 struct fbcon_ops *ops = info->fbcon_par;
276
277 return (ops) ? ops->rotate : 0;
278 }
279
280 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
281 {
282 struct fbcon_ops *ops = info->fbcon_par;
283
284 return (info->state != FBINFO_STATE_RUNNING ||
285 vc->vc_mode != KD_TEXT || ops->graphics) &&
286 !vt_force_oops_output(vc);
287 }
288
289 static int get_color(struct vc_data *vc, struct fb_info *info,
290 u16 c, int is_fg)
291 {
292 int depth = fb_get_color_depth(&info->var, &info->fix);
293 int color = 0;
294
295 if (console_blanked) {
296 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
297
298 c = vc->vc_video_erase_char & charmask;
299 }
300
301 if (depth != 1)
302 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
303 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
304
305 switch (depth) {
306 case 1:
307 {
308 int col = mono_col(info);
309 /* 0 or 1 */
310 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
311 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
312
313 if (console_blanked)
314 fg = bg;
315
316 color = (is_fg) ? fg : bg;
317 break;
318 }
319 case 2:
320 /*
321 * Scale down 16-colors to 4 colors. Default 4-color palette
322 * is grayscale. However, simply dividing the values by 4
323 * will not work, as colors 1, 2 and 3 will be scaled-down
324 * to zero rendering them invisible. So empirically convert
325 * colors to a sane 4-level grayscale.
326 */
327 switch (color) {
328 case 0:
329 color = 0; /* black */
330 break;
331 case 1 ... 6:
332 color = 2; /* white */
333 break;
334 case 7 ... 8:
335 color = 1; /* gray */
336 break;
337 default:
338 color = 3; /* intense white */
339 break;
340 }
341 break;
342 case 3:
343 /*
344 * Last 8 entries of default 16-color palette is a more intense
345 * version of the first 8 (i.e., same chrominance, different
346 * luminance).
347 */
348 color &= 7;
349 break;
350 }
351
352
353 return color;
354 }
355
356 static void fbcon_update_softback(struct vc_data *vc)
357 {
358 int l = fbcon_softback_size / vc->vc_size_row;
359
360 if (l > 5)
361 softback_end = softback_buf + l * vc->vc_size_row;
362 else
363 /* Smaller scrollback makes no sense, and 0 would screw
364 the operation totally */
365 softback_top = 0;
366 }
367
368 static void fb_flashcursor(struct work_struct *work)
369 {
370 struct fb_info *info = container_of(work, struct fb_info, queue);
371 struct fbcon_ops *ops = info->fbcon_par;
372 struct vc_data *vc = NULL;
373 int c;
374 int mode;
375 int ret;
376
377 /* FIXME: we should sort out the unbind locking instead */
378 /* instead we just fail to flash the cursor if we can't get
379 * the lock instead of blocking fbcon deinit */
380 ret = console_trylock();
381 if (ret == 0)
382 return;
383
384 if (ops && ops->currcon != -1)
385 vc = vc_cons[ops->currcon].d;
386
387 if (!vc || !CON_IS_VISIBLE(vc) ||
388 registered_fb[con2fb_map[vc->vc_num]] != info ||
389 vc->vc_deccm != 1) {
390 console_unlock();
391 return;
392 }
393
394 c = scr_readw((u16 *) vc->vc_pos);
395 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
396 CM_ERASE : CM_DRAW;
397 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
398 get_color(vc, info, c, 0));
399 console_unlock();
400 }
401
402 static void cursor_timer_handler(unsigned long dev_addr)
403 {
404 struct fb_info *info = (struct fb_info *) dev_addr;
405 struct fbcon_ops *ops = info->fbcon_par;
406
407 schedule_work(&info->queue);
408 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
409 }
410
411 static void fbcon_add_cursor_timer(struct fb_info *info)
412 {
413 struct fbcon_ops *ops = info->fbcon_par;
414
415 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
416 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
417 !fbcon_cursor_noblink) {
418 if (!info->queue.func)
419 INIT_WORK(&info->queue, fb_flashcursor);
420
421 init_timer(&ops->cursor_timer);
422 ops->cursor_timer.function = cursor_timer_handler;
423 ops->cursor_timer.expires = jiffies + HZ / 5;
424 ops->cursor_timer.data = (unsigned long ) info;
425 add_timer(&ops->cursor_timer);
426 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
427 }
428 }
429
430 static void fbcon_del_cursor_timer(struct fb_info *info)
431 {
432 struct fbcon_ops *ops = info->fbcon_par;
433
434 if (info->queue.func == fb_flashcursor &&
435 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
436 del_timer_sync(&ops->cursor_timer);
437 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
438 }
439 }
440
441 #ifndef MODULE
442 static int __init fb_console_setup(char *this_opt)
443 {
444 char *options;
445 int i, j;
446
447 if (!this_opt || !*this_opt)
448 return 1;
449
450 while ((options = strsep(&this_opt, ",")) != NULL) {
451 if (!strncmp(options, "font:", 5))
452 strlcpy(fontname, options + 5, sizeof(fontname));
453
454 if (!strncmp(options, "scrollback:", 11)) {
455 options += 11;
456 if (*options) {
457 fbcon_softback_size = simple_strtoul(options, &options, 0);
458 if (*options == 'k' || *options == 'K') {
459 fbcon_softback_size *= 1024;
460 options++;
461 }
462 if (*options != ',')
463 return 1;
464 options++;
465 } else
466 return 1;
467 }
468
469 if (!strncmp(options, "map:", 4)) {
470 options += 4;
471 if (*options) {
472 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
473 if (!options[j])
474 j = 0;
475 con2fb_map_boot[i] =
476 (options[j++]-'0') % FB_MAX;
477 }
478
479 fbcon_map_override();
480 }
481
482 return 1;
483 }
484
485 if (!strncmp(options, "vc:", 3)) {
486 options += 3;
487 if (*options)
488 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
489 if (first_fb_vc < 0)
490 first_fb_vc = 0;
491 if (*options++ == '-')
492 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
493 fbcon_is_default = 0;
494 }
495
496 if (!strncmp(options, "rotate:", 7)) {
497 options += 7;
498 if (*options)
499 initial_rotation = simple_strtoul(options, &options, 0);
500 if (initial_rotation > 3)
501 initial_rotation = 0;
502 }
503 }
504 return 1;
505 }
506
507 __setup("fbcon=", fb_console_setup);
508 #endif
509
510 static int search_fb_in_map(int idx)
511 {
512 int i, retval = 0;
513
514 for (i = first_fb_vc; i <= last_fb_vc; i++) {
515 if (con2fb_map[i] == idx)
516 retval = 1;
517 }
518 return retval;
519 }
520
521 static int search_for_mapped_con(void)
522 {
523 int i, retval = 0;
524
525 for (i = first_fb_vc; i <= last_fb_vc; i++) {
526 if (con2fb_map[i] != -1)
527 retval = 1;
528 }
529 return retval;
530 }
531
532 static int fbcon_takeover(int show_logo)
533 {
534 int err, i;
535
536 if (!num_registered_fb)
537 return -ENODEV;
538
539 if (!show_logo)
540 logo_shown = FBCON_LOGO_DONTSHOW;
541
542 for (i = first_fb_vc; i <= last_fb_vc; i++)
543 con2fb_map[i] = info_idx;
544
545 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
546 fbcon_is_default);
547
548 if (err) {
549 for (i = first_fb_vc; i <= last_fb_vc; i++) {
550 con2fb_map[i] = -1;
551 }
552 info_idx = -1;
553 } else {
554 fbcon_has_console_bind = 1;
555 }
556
557 return err;
558 }
559
560 #ifdef MODULE
561 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
562 int cols, int rows, int new_cols, int new_rows)
563 {
564 logo_shown = FBCON_LOGO_DONTSHOW;
565 }
566 #else
567 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
568 int cols, int rows, int new_cols, int new_rows)
569 {
570 /* Need to make room for the logo */
571 struct fbcon_ops *ops = info->fbcon_par;
572 int cnt, erase = vc->vc_video_erase_char, step;
573 unsigned short *save = NULL, *r, *q;
574 int logo_height;
575
576 if (info->flags & FBINFO_MODULE) {
577 logo_shown = FBCON_LOGO_DONTSHOW;
578 return;
579 }
580
581 /*
582 * remove underline attribute from erase character
583 * if black and white framebuffer.
584 */
585 if (fb_get_color_depth(&info->var, &info->fix) == 1)
586 erase &= ~0x400;
587 logo_height = fb_prepare_logo(info, ops->rotate);
588 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
589 q = (unsigned short *) (vc->vc_origin +
590 vc->vc_size_row * rows);
591 step = logo_lines * cols;
592 for (r = q - logo_lines * cols; r < q; r++)
593 if (scr_readw(r) != vc->vc_video_erase_char)
594 break;
595 if (r != q && new_rows >= rows + logo_lines) {
596 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
597 if (save) {
598 int i = cols < new_cols ? cols : new_cols;
599 scr_memsetw(save, erase, logo_lines * new_cols * 2);
600 r = q - step;
601 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
602 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
603 r = q;
604 }
605 }
606 if (r == q) {
607 /* We can scroll screen down */
608 r = q - step - cols;
609 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
610 scr_memcpyw(r + step, r, vc->vc_size_row);
611 r -= cols;
612 }
613 if (!save) {
614 int lines;
615 if (vc->vc_y + logo_lines >= rows)
616 lines = rows - vc->vc_y - 1;
617 else
618 lines = logo_lines;
619 vc->vc_y += lines;
620 vc->vc_pos += lines * vc->vc_size_row;
621 }
622 }
623 scr_memsetw((unsigned short *) vc->vc_origin,
624 erase,
625 vc->vc_size_row * logo_lines);
626
627 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
628 fbcon_clear_margins(vc, 0);
629 update_screen(vc);
630 }
631
632 if (save) {
633 q = (unsigned short *) (vc->vc_origin +
634 vc->vc_size_row *
635 rows);
636 scr_memcpyw(q, save, logo_lines * new_cols * 2);
637 vc->vc_y += logo_lines;
638 vc->vc_pos += logo_lines * vc->vc_size_row;
639 kfree(save);
640 }
641
642 if (logo_lines > vc->vc_bottom) {
643 logo_shown = FBCON_LOGO_CANSHOW;
644 printk(KERN_INFO
645 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
646 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
647 logo_shown = FBCON_LOGO_DRAW;
648 vc->vc_top = logo_lines;
649 }
650 }
651 #endif /* MODULE */
652
653 #ifdef CONFIG_FB_TILEBLITTING
654 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
655 {
656 struct fbcon_ops *ops = info->fbcon_par;
657
658 ops->p = &fb_display[vc->vc_num];
659
660 if ((info->flags & FBINFO_MISC_TILEBLITTING))
661 fbcon_set_tileops(vc, info);
662 else {
663 fbcon_set_rotation(info);
664 fbcon_set_bitops(ops);
665 }
666 }
667
668 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
669 {
670 int err = 0;
671
672 if (info->flags & FBINFO_MISC_TILEBLITTING &&
673 info->tileops->fb_get_tilemax(info) < charcount)
674 err = 1;
675
676 return err;
677 }
678 #else
679 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
680 {
681 struct fbcon_ops *ops = info->fbcon_par;
682
683 info->flags &= ~FBINFO_MISC_TILEBLITTING;
684 ops->p = &fb_display[vc->vc_num];
685 fbcon_set_rotation(info);
686 fbcon_set_bitops(ops);
687 }
688
689 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
690 {
691 return 0;
692 }
693
694 #endif /* CONFIG_MISC_TILEBLITTING */
695
696
697 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
698 int unit, int oldidx)
699 {
700 struct fbcon_ops *ops = NULL;
701 int err = 0;
702
703 if (!try_module_get(info->fbops->owner))
704 err = -ENODEV;
705
706 if (!err && info->fbops->fb_open &&
707 info->fbops->fb_open(info, 0))
708 err = -ENODEV;
709
710 if (!err) {
711 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
712 if (!ops)
713 err = -ENOMEM;
714 }
715
716 if (!err) {
717 info->fbcon_par = ops;
718
719 if (vc)
720 set_blitting_type(vc, info);
721 }
722
723 if (err) {
724 con2fb_map[unit] = oldidx;
725 module_put(info->fbops->owner);
726 }
727
728 return err;
729 }
730
731 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
732 struct fb_info *newinfo, int unit,
733 int oldidx, int found)
734 {
735 struct fbcon_ops *ops = oldinfo->fbcon_par;
736 int err = 0, ret;
737
738 if (oldinfo->fbops->fb_release &&
739 oldinfo->fbops->fb_release(oldinfo, 0)) {
740 con2fb_map[unit] = oldidx;
741 if (!found && newinfo->fbops->fb_release)
742 newinfo->fbops->fb_release(newinfo, 0);
743 if (!found)
744 module_put(newinfo->fbops->owner);
745 err = -ENODEV;
746 }
747
748 if (!err) {
749 fbcon_del_cursor_timer(oldinfo);
750 kfree(ops->cursor_state.mask);
751 kfree(ops->cursor_data);
752 kfree(ops->fontbuffer);
753 kfree(oldinfo->fbcon_par);
754 oldinfo->fbcon_par = NULL;
755 module_put(oldinfo->fbops->owner);
756 /*
757 If oldinfo and newinfo are driving the same hardware,
758 the fb_release() method of oldinfo may attempt to
759 restore the hardware state. This will leave the
760 newinfo in an undefined state. Thus, a call to
761 fb_set_par() may be needed for the newinfo.
762 */
763 if (newinfo->fbops->fb_set_par) {
764 ret = newinfo->fbops->fb_set_par(newinfo);
765
766 if (ret)
767 printk(KERN_ERR "con2fb_release_oldinfo: "
768 "detected unhandled fb_set_par error, "
769 "error code %d\n", ret);
770 }
771 }
772
773 return err;
774 }
775
776 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
777 int unit, int show_logo)
778 {
779 struct fbcon_ops *ops = info->fbcon_par;
780 int ret;
781
782 ops->currcon = fg_console;
783
784 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
785 ret = info->fbops->fb_set_par(info);
786
787 if (ret)
788 printk(KERN_ERR "con2fb_init_display: detected "
789 "unhandled fb_set_par error, "
790 "error code %d\n", ret);
791 }
792
793 ops->flags |= FBCON_FLAGS_INIT;
794 ops->graphics = 0;
795 fbcon_set_disp(info, &info->var, unit);
796
797 if (show_logo) {
798 struct vc_data *fg_vc = vc_cons[fg_console].d;
799 struct fb_info *fg_info =
800 registered_fb[con2fb_map[fg_console]];
801
802 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
803 fg_vc->vc_rows, fg_vc->vc_cols,
804 fg_vc->vc_rows);
805 }
806
807 update_screen(vc_cons[fg_console].d);
808 }
809
810 /**
811 * set_con2fb_map - map console to frame buffer device
812 * @unit: virtual console number to map
813 * @newidx: frame buffer index to map virtual console to
814 * @user: user request
815 *
816 * Maps a virtual console @unit to a frame buffer device
817 * @newidx.
818 */
819 static int set_con2fb_map(int unit, int newidx, int user)
820 {
821 struct vc_data *vc = vc_cons[unit].d;
822 int oldidx = con2fb_map[unit];
823 struct fb_info *info = registered_fb[newidx];
824 struct fb_info *oldinfo = NULL;
825 int found, err = 0;
826
827 if (oldidx == newidx)
828 return 0;
829
830 if (!info)
831 return -EINVAL;
832
833 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
834 info_idx = newidx;
835 return fbcon_takeover(0);
836 }
837
838 if (oldidx != -1)
839 oldinfo = registered_fb[oldidx];
840
841 found = search_fb_in_map(newidx);
842
843 console_lock();
844 con2fb_map[unit] = newidx;
845 if (!err && !found)
846 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
847
848
849 /*
850 * If old fb is not mapped to any of the consoles,
851 * fbcon should release it.
852 */
853 if (!err && oldinfo && !search_fb_in_map(oldidx))
854 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
855 found);
856
857 if (!err) {
858 int show_logo = (fg_console == 0 && !user &&
859 logo_shown != FBCON_LOGO_DONTSHOW);
860
861 if (!found)
862 fbcon_add_cursor_timer(info);
863 con2fb_map_boot[unit] = newidx;
864 con2fb_init_display(vc, info, unit, show_logo);
865 }
866
867 if (!search_fb_in_map(info_idx))
868 info_idx = newidx;
869
870 console_unlock();
871 return err;
872 }
873
874 /*
875 * Low Level Operations
876 */
877 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
878 static int var_to_display(struct display *disp,
879 struct fb_var_screeninfo *var,
880 struct fb_info *info)
881 {
882 disp->xres_virtual = var->xres_virtual;
883 disp->yres_virtual = var->yres_virtual;
884 disp->bits_per_pixel = var->bits_per_pixel;
885 disp->grayscale = var->grayscale;
886 disp->nonstd = var->nonstd;
887 disp->accel_flags = var->accel_flags;
888 disp->height = var->height;
889 disp->width = var->width;
890 disp->red = var->red;
891 disp->green = var->green;
892 disp->blue = var->blue;
893 disp->transp = var->transp;
894 disp->rotate = var->rotate;
895 disp->mode = fb_match_mode(var, &info->modelist);
896 if (disp->mode == NULL)
897 /* This should not happen */
898 return -EINVAL;
899 return 0;
900 }
901
902 static void display_to_var(struct fb_var_screeninfo *var,
903 struct display *disp)
904 {
905 fb_videomode_to_var(var, disp->mode);
906 var->xres_virtual = disp->xres_virtual;
907 var->yres_virtual = disp->yres_virtual;
908 var->bits_per_pixel = disp->bits_per_pixel;
909 var->grayscale = disp->grayscale;
910 var->nonstd = disp->nonstd;
911 var->accel_flags = disp->accel_flags;
912 var->height = disp->height;
913 var->width = disp->width;
914 var->red = disp->red;
915 var->green = disp->green;
916 var->blue = disp->blue;
917 var->transp = disp->transp;
918 var->rotate = disp->rotate;
919 }
920
921 static const char *fbcon_startup(void)
922 {
923 const char *display_desc = "frame buffer device";
924 struct display *p = &fb_display[fg_console];
925 struct vc_data *vc = vc_cons[fg_console].d;
926 const struct font_desc *font = NULL;
927 struct module *owner;
928 struct fb_info *info = NULL;
929 struct fbcon_ops *ops;
930 int rows, cols;
931
932 /*
933 * If num_registered_fb is zero, this is a call for the dummy part.
934 * The frame buffer devices weren't initialized yet.
935 */
936 if (!num_registered_fb || info_idx == -1)
937 return display_desc;
938 /*
939 * Instead of blindly using registered_fb[0], we use info_idx, set by
940 * fb_console_init();
941 */
942 info = registered_fb[info_idx];
943 if (!info)
944 return NULL;
945
946 owner = info->fbops->owner;
947 if (!try_module_get(owner))
948 return NULL;
949 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
950 module_put(owner);
951 return NULL;
952 }
953
954 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
955 if (!ops) {
956 module_put(owner);
957 return NULL;
958 }
959
960 ops->currcon = -1;
961 ops->graphics = 1;
962 ops->cur_rotate = -1;
963 info->fbcon_par = ops;
964 p->con_rotate = initial_rotation;
965 set_blitting_type(vc, info);
966
967 if (info->fix.type != FB_TYPE_TEXT) {
968 if (fbcon_softback_size) {
969 if (!softback_buf) {
970 softback_buf =
971 (unsigned long)
972 kmalloc(fbcon_softback_size,
973 GFP_KERNEL);
974 if (!softback_buf) {
975 fbcon_softback_size = 0;
976 softback_top = 0;
977 }
978 }
979 } else {
980 if (softback_buf) {
981 kfree((void *) softback_buf);
982 softback_buf = 0;
983 softback_top = 0;
984 }
985 }
986 if (softback_buf)
987 softback_in = softback_top = softback_curr =
988 softback_buf;
989 softback_lines = 0;
990 }
991
992 /* Setup default font */
993 if (!p->fontdata) {
994 if (!fontname[0] || !(font = find_font(fontname)))
995 font = get_default_font(info->var.xres,
996 info->var.yres,
997 info->pixmap.blit_x,
998 info->pixmap.blit_y);
999 vc->vc_font.width = font->width;
1000 vc->vc_font.height = font->height;
1001 vc->vc_font.data = (void *)(p->fontdata = font->data);
1002 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1003 }
1004
1005 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1006 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1007 cols /= vc->vc_font.width;
1008 rows /= vc->vc_font.height;
1009 vc_resize(vc, cols, rows);
1010
1011 DPRINTK("mode: %s\n", info->fix.id);
1012 DPRINTK("visual: %d\n", info->fix.visual);
1013 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1014 info->var.yres,
1015 info->var.bits_per_pixel);
1016
1017 fbcon_add_cursor_timer(info);
1018 fbcon_has_exited = 0;
1019 return display_desc;
1020 }
1021
1022 static void fbcon_init(struct vc_data *vc, int init)
1023 {
1024 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1025 struct fbcon_ops *ops;
1026 struct vc_data **default_mode = vc->vc_display_fg;
1027 struct vc_data *svc = *default_mode;
1028 struct display *t, *p = &fb_display[vc->vc_num];
1029 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1030 int cap, ret;
1031
1032 if (info_idx == -1 || info == NULL)
1033 return;
1034
1035 cap = info->flags;
1036
1037 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1038 (info->fix.type == FB_TYPE_TEXT))
1039 logo = 0;
1040
1041 if (var_to_display(p, &info->var, info))
1042 return;
1043
1044 if (!info->fbcon_par)
1045 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1046
1047 /* If we are not the first console on this
1048 fb, copy the font from that console */
1049 t = &fb_display[fg_console];
1050 if (!p->fontdata) {
1051 if (t->fontdata) {
1052 struct vc_data *fvc = vc_cons[fg_console].d;
1053
1054 vc->vc_font.data = (void *)(p->fontdata =
1055 fvc->vc_font.data);
1056 vc->vc_font.width = fvc->vc_font.width;
1057 vc->vc_font.height = fvc->vc_font.height;
1058 p->userfont = t->userfont;
1059
1060 if (p->userfont)
1061 REFCOUNT(p->fontdata)++;
1062 } else {
1063 const struct font_desc *font = NULL;
1064
1065 if (!fontname[0] || !(font = find_font(fontname)))
1066 font = get_default_font(info->var.xres,
1067 info->var.yres,
1068 info->pixmap.blit_x,
1069 info->pixmap.blit_y);
1070 vc->vc_font.width = font->width;
1071 vc->vc_font.height = font->height;
1072 vc->vc_font.data = (void *)(p->fontdata = font->data);
1073 vc->vc_font.charcount = 256; /* FIXME Need to
1074 support more fonts */
1075 }
1076 }
1077
1078 if (p->userfont)
1079 charcnt = FNTCHARCNT(p->fontdata);
1080
1081 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1082 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084 if (charcnt == 256) {
1085 vc->vc_hi_font_mask = 0;
1086 } else {
1087 vc->vc_hi_font_mask = 0x100;
1088 if (vc->vc_can_do_color)
1089 vc->vc_complement_mask <<= 1;
1090 }
1091
1092 if (!*svc->vc_uni_pagedir_loc)
1093 con_set_default_unimap(svc);
1094 if (!*vc->vc_uni_pagedir_loc)
1095 con_copy_unimap(vc, svc);
1096
1097 ops = info->fbcon_par;
1098 p->con_rotate = initial_rotation;
1099 set_blitting_type(vc, info);
1100
1101 cols = vc->vc_cols;
1102 rows = vc->vc_rows;
1103 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1104 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1105 new_cols /= vc->vc_font.width;
1106 new_rows /= vc->vc_font.height;
1107
1108 /*
1109 * We must always set the mode. The mode of the previous console
1110 * driver could be in the same resolution but we are using different
1111 * hardware so we have to initialize the hardware.
1112 *
1113 * We need to do it in fbcon_init() to prevent screen corruption.
1114 */
1115 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1116 if (info->fbops->fb_set_par &&
1117 !(ops->flags & FBCON_FLAGS_INIT)) {
1118 ret = info->fbops->fb_set_par(info);
1119
1120 if (ret)
1121 printk(KERN_ERR "fbcon_init: detected "
1122 "unhandled fb_set_par error, "
1123 "error code %d\n", ret);
1124 }
1125
1126 ops->flags |= FBCON_FLAGS_INIT;
1127 }
1128
1129 ops->graphics = 0;
1130
1131 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1132 !(cap & FBINFO_HWACCEL_DISABLED))
1133 p->scrollmode = SCROLL_MOVE;
1134 else /* default to something safe */
1135 p->scrollmode = SCROLL_REDRAW;
1136
1137 /*
1138 * ++guenther: console.c:vc_allocate() relies on initializing
1139 * vc_{cols,rows}, but we must not set those if we are only
1140 * resizing the console.
1141 */
1142 if (init) {
1143 vc->vc_cols = new_cols;
1144 vc->vc_rows = new_rows;
1145 } else
1146 vc_resize(vc, new_cols, new_rows);
1147
1148 if (logo)
1149 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1150
1151 if (vc == svc && softback_buf)
1152 fbcon_update_softback(vc);
1153
1154 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1155 ops->rotate = FB_ROTATE_UR;
1156 set_blitting_type(vc, info);
1157 }
1158
1159 ops->p = &fb_display[fg_console];
1160 }
1161
1162 static void fbcon_free_font(struct display *p)
1163 {
1164 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1165 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1166 p->fontdata = NULL;
1167 p->userfont = 0;
1168 }
1169
1170 static void fbcon_deinit(struct vc_data *vc)
1171 {
1172 struct display *p = &fb_display[vc->vc_num];
1173 struct fb_info *info;
1174 struct fbcon_ops *ops;
1175 int idx;
1176
1177 fbcon_free_font(p);
1178 idx = con2fb_map[vc->vc_num];
1179
1180 if (idx == -1)
1181 goto finished;
1182
1183 info = registered_fb[idx];
1184
1185 if (!info)
1186 goto finished;
1187
1188 ops = info->fbcon_par;
1189
1190 if (!ops)
1191 goto finished;
1192
1193 if (CON_IS_VISIBLE(vc))
1194 fbcon_del_cursor_timer(info);
1195
1196 ops->flags &= ~FBCON_FLAGS_INIT;
1197 finished:
1198
1199 if (!con_is_bound(&fb_con))
1200 fbcon_exit();
1201
1202 return;
1203 }
1204
1205 /* ====================================================================== */
1206
1207 /* fbcon_XXX routines - interface used by the world
1208 *
1209 * This system is now divided into two levels because of complications
1210 * caused by hardware scrolling. Top level functions:
1211 *
1212 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1213 *
1214 * handles y values in range [0, scr_height-1] that correspond to real
1215 * screen positions. y_wrap shift means that first line of bitmap may be
1216 * anywhere on this display. These functions convert lineoffsets to
1217 * bitmap offsets and deal with the wrap-around case by splitting blits.
1218 *
1219 * fbcon_bmove_physical_8() -- These functions fast implementations
1220 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1221 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1222 *
1223 * WARNING:
1224 *
1225 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1226 * Implies should only really hardware scroll in rows. Only reason for
1227 * restriction is simplicity & efficiency at the moment.
1228 */
1229
1230 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1231 int width)
1232 {
1233 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1234 struct fbcon_ops *ops = info->fbcon_par;
1235
1236 struct display *p = &fb_display[vc->vc_num];
1237 u_int y_break;
1238
1239 if (fbcon_is_inactive(vc, info))
1240 return;
1241
1242 if (!height || !width)
1243 return;
1244
1245 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1246 vc->vc_top = 0;
1247
1248 /* Split blits that cross physical y_wrap boundary */
1249
1250 y_break = p->vrows - p->yscroll;
1251 if (sy < y_break && sy + height - 1 >= y_break) {
1252 u_int b = y_break - sy;
1253 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1254 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1255 width);
1256 } else
1257 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1258 }
1259
1260 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1261 int count, int ypos, int xpos)
1262 {
1263 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1264 struct display *p = &fb_display[vc->vc_num];
1265 struct fbcon_ops *ops = info->fbcon_par;
1266
1267 if (!fbcon_is_inactive(vc, info))
1268 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1269 get_color(vc, info, scr_readw(s), 1),
1270 get_color(vc, info, scr_readw(s), 0));
1271 }
1272
1273 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1274 {
1275 unsigned short chr;
1276
1277 scr_writew(c, &chr);
1278 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1279 }
1280
1281 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1282 {
1283 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1284 struct fbcon_ops *ops = info->fbcon_par;
1285
1286 if (!fbcon_is_inactive(vc, info))
1287 ops->clear_margins(vc, info, bottom_only);
1288 }
1289
1290 static void fbcon_cursor(struct vc_data *vc, int mode)
1291 {
1292 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1293 struct fbcon_ops *ops = info->fbcon_par;
1294 int y;
1295 int c = scr_readw((u16 *) vc->vc_pos);
1296
1297 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1298 return;
1299
1300 if (vc->vc_cursor_type & 0x10)
1301 fbcon_del_cursor_timer(info);
1302 else
1303 fbcon_add_cursor_timer(info);
1304
1305 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1306 if (mode & CM_SOFTBACK) {
1307 mode &= ~CM_SOFTBACK;
1308 y = softback_lines;
1309 } else {
1310 if (softback_lines)
1311 fbcon_set_origin(vc);
1312 y = 0;
1313 }
1314
1315 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1316 get_color(vc, info, c, 0));
1317 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1318 }
1319
1320 static int scrollback_phys_max = 0;
1321 static int scrollback_max = 0;
1322 static int scrollback_current = 0;
1323
1324 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1325 int unit)
1326 {
1327 struct display *p, *t;
1328 struct vc_data **default_mode, *vc;
1329 struct vc_data *svc;
1330 struct fbcon_ops *ops = info->fbcon_par;
1331 int rows, cols, charcnt = 256;
1332
1333 p = &fb_display[unit];
1334
1335 if (var_to_display(p, var, info))
1336 return;
1337
1338 vc = vc_cons[unit].d;
1339
1340 if (!vc)
1341 return;
1342
1343 default_mode = vc->vc_display_fg;
1344 svc = *default_mode;
1345 t = &fb_display[svc->vc_num];
1346
1347 if (!vc->vc_font.data) {
1348 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1349 vc->vc_font.width = (*default_mode)->vc_font.width;
1350 vc->vc_font.height = (*default_mode)->vc_font.height;
1351 p->userfont = t->userfont;
1352 if (p->userfont)
1353 REFCOUNT(p->fontdata)++;
1354 }
1355 if (p->userfont)
1356 charcnt = FNTCHARCNT(p->fontdata);
1357
1358 var->activate = FB_ACTIVATE_NOW;
1359 info->var.activate = var->activate;
1360 var->yoffset = info->var.yoffset;
1361 var->xoffset = info->var.xoffset;
1362 fb_set_var(info, var);
1363 ops->var = info->var;
1364 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1365 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1366 if (charcnt == 256) {
1367 vc->vc_hi_font_mask = 0;
1368 } else {
1369 vc->vc_hi_font_mask = 0x100;
1370 if (vc->vc_can_do_color)
1371 vc->vc_complement_mask <<= 1;
1372 }
1373
1374 if (!*svc->vc_uni_pagedir_loc)
1375 con_set_default_unimap(svc);
1376 if (!*vc->vc_uni_pagedir_loc)
1377 con_copy_unimap(vc, svc);
1378
1379 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1380 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1381 cols /= vc->vc_font.width;
1382 rows /= vc->vc_font.height;
1383 vc_resize(vc, cols, rows);
1384
1385 if (CON_IS_VISIBLE(vc)) {
1386 update_screen(vc);
1387 if (softback_buf)
1388 fbcon_update_softback(vc);
1389 }
1390 }
1391
1392 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1393 {
1394 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1395 struct fbcon_ops *ops = info->fbcon_par;
1396 struct display *p = &fb_display[vc->vc_num];
1397
1398 p->yscroll += count;
1399 if (p->yscroll >= p->vrows) /* Deal with wrap */
1400 p->yscroll -= p->vrows;
1401 ops->var.xoffset = 0;
1402 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1403 ops->var.vmode |= FB_VMODE_YWRAP;
1404 ops->update_start(info);
1405 scrollback_max += count;
1406 if (scrollback_max > scrollback_phys_max)
1407 scrollback_max = scrollback_phys_max;
1408 scrollback_current = 0;
1409 }
1410
1411 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1412 {
1413 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1414 struct fbcon_ops *ops = info->fbcon_par;
1415 struct display *p = &fb_display[vc->vc_num];
1416
1417 p->yscroll -= count;
1418 if (p->yscroll < 0) /* Deal with wrap */
1419 p->yscroll += p->vrows;
1420 ops->var.xoffset = 0;
1421 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1422 ops->var.vmode |= FB_VMODE_YWRAP;
1423 ops->update_start(info);
1424 scrollback_max -= count;
1425 if (scrollback_max < 0)
1426 scrollback_max = 0;
1427 scrollback_current = 0;
1428 }
1429
1430 static __inline__ void ypan_up(struct vc_data *vc, int count)
1431 {
1432 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1433 struct display *p = &fb_display[vc->vc_num];
1434 struct fbcon_ops *ops = info->fbcon_par;
1435
1436 p->yscroll += count;
1437 if (p->yscroll > p->vrows - vc->vc_rows) {
1438 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1439 0, 0, 0, vc->vc_rows, vc->vc_cols);
1440 p->yscroll -= p->vrows - vc->vc_rows;
1441 }
1442
1443 ops->var.xoffset = 0;
1444 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1445 ops->var.vmode &= ~FB_VMODE_YWRAP;
1446 ops->update_start(info);
1447 fbcon_clear_margins(vc, 1);
1448 scrollback_max += count;
1449 if (scrollback_max > scrollback_phys_max)
1450 scrollback_max = scrollback_phys_max;
1451 scrollback_current = 0;
1452 }
1453
1454 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1455 {
1456 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1457 struct fbcon_ops *ops = info->fbcon_par;
1458 struct display *p = &fb_display[vc->vc_num];
1459
1460 p->yscroll += count;
1461
1462 if (p->yscroll > p->vrows - vc->vc_rows) {
1463 p->yscroll -= p->vrows - vc->vc_rows;
1464 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1465 }
1466
1467 ops->var.xoffset = 0;
1468 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1469 ops->var.vmode &= ~FB_VMODE_YWRAP;
1470 ops->update_start(info);
1471 fbcon_clear_margins(vc, 1);
1472 scrollback_max += count;
1473 if (scrollback_max > scrollback_phys_max)
1474 scrollback_max = scrollback_phys_max;
1475 scrollback_current = 0;
1476 }
1477
1478 static __inline__ void ypan_down(struct vc_data *vc, int count)
1479 {
1480 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1481 struct display *p = &fb_display[vc->vc_num];
1482 struct fbcon_ops *ops = info->fbcon_par;
1483
1484 p->yscroll -= count;
1485 if (p->yscroll < 0) {
1486 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1487 0, vc->vc_rows, vc->vc_cols);
1488 p->yscroll += p->vrows - vc->vc_rows;
1489 }
1490
1491 ops->var.xoffset = 0;
1492 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1493 ops->var.vmode &= ~FB_VMODE_YWRAP;
1494 ops->update_start(info);
1495 fbcon_clear_margins(vc, 1);
1496 scrollback_max -= count;
1497 if (scrollback_max < 0)
1498 scrollback_max = 0;
1499 scrollback_current = 0;
1500 }
1501
1502 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1503 {
1504 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1505 struct fbcon_ops *ops = info->fbcon_par;
1506 struct display *p = &fb_display[vc->vc_num];
1507
1508 p->yscroll -= count;
1509
1510 if (p->yscroll < 0) {
1511 p->yscroll += p->vrows - vc->vc_rows;
1512 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1513 }
1514
1515 ops->var.xoffset = 0;
1516 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1517 ops->var.vmode &= ~FB_VMODE_YWRAP;
1518 ops->update_start(info);
1519 fbcon_clear_margins(vc, 1);
1520 scrollback_max -= count;
1521 if (scrollback_max < 0)
1522 scrollback_max = 0;
1523 scrollback_current = 0;
1524 }
1525
1526 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1527 long delta)
1528 {
1529 int count = vc->vc_rows;
1530 unsigned short *d, *s;
1531 unsigned long n;
1532 int line = 0;
1533
1534 d = (u16 *) softback_curr;
1535 if (d == (u16 *) softback_in)
1536 d = (u16 *) vc->vc_origin;
1537 n = softback_curr + delta * vc->vc_size_row;
1538 softback_lines -= delta;
1539 if (delta < 0) {
1540 if (softback_curr < softback_top && n < softback_buf) {
1541 n += softback_end - softback_buf;
1542 if (n < softback_top) {
1543 softback_lines -=
1544 (softback_top - n) / vc->vc_size_row;
1545 n = softback_top;
1546 }
1547 } else if (softback_curr >= softback_top
1548 && n < softback_top) {
1549 softback_lines -=
1550 (softback_top - n) / vc->vc_size_row;
1551 n = softback_top;
1552 }
1553 } else {
1554 if (softback_curr > softback_in && n >= softback_end) {
1555 n += softback_buf - softback_end;
1556 if (n > softback_in) {
1557 n = softback_in;
1558 softback_lines = 0;
1559 }
1560 } else if (softback_curr <= softback_in && n > softback_in) {
1561 n = softback_in;
1562 softback_lines = 0;
1563 }
1564 }
1565 if (n == softback_curr)
1566 return;
1567 softback_curr = n;
1568 s = (u16 *) softback_curr;
1569 if (s == (u16 *) softback_in)
1570 s = (u16 *) vc->vc_origin;
1571 while (count--) {
1572 unsigned short *start;
1573 unsigned short *le;
1574 unsigned short c;
1575 int x = 0;
1576 unsigned short attr = 1;
1577
1578 start = s;
1579 le = advance_row(s, 1);
1580 do {
1581 c = scr_readw(s);
1582 if (attr != (c & 0xff00)) {
1583 attr = c & 0xff00;
1584 if (s > start) {
1585 fbcon_putcs(vc, start, s - start,
1586 line, x);
1587 x += s - start;
1588 start = s;
1589 }
1590 }
1591 if (c == scr_readw(d)) {
1592 if (s > start) {
1593 fbcon_putcs(vc, start, s - start,
1594 line, x);
1595 x += s - start + 1;
1596 start = s + 1;
1597 } else {
1598 x++;
1599 start++;
1600 }
1601 }
1602 s++;
1603 d++;
1604 } while (s < le);
1605 if (s > start)
1606 fbcon_putcs(vc, start, s - start, line, x);
1607 line++;
1608 if (d == (u16 *) softback_end)
1609 d = (u16 *) softback_buf;
1610 if (d == (u16 *) softback_in)
1611 d = (u16 *) vc->vc_origin;
1612 if (s == (u16 *) softback_end)
1613 s = (u16 *) softback_buf;
1614 if (s == (u16 *) softback_in)
1615 s = (u16 *) vc->vc_origin;
1616 }
1617 }
1618
1619 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1620 int line, int count, int dy)
1621 {
1622 unsigned short *s = (unsigned short *)
1623 (vc->vc_origin + vc->vc_size_row * line);
1624
1625 while (count--) {
1626 unsigned short *start = s;
1627 unsigned short *le = advance_row(s, 1);
1628 unsigned short c;
1629 int x = 0;
1630 unsigned short attr = 1;
1631
1632 do {
1633 c = scr_readw(s);
1634 if (attr != (c & 0xff00)) {
1635 attr = c & 0xff00;
1636 if (s > start) {
1637 fbcon_putcs(vc, start, s - start,
1638 dy, x);
1639 x += s - start;
1640 start = s;
1641 }
1642 }
1643 console_conditional_schedule();
1644 s++;
1645 } while (s < le);
1646 if (s > start)
1647 fbcon_putcs(vc, start, s - start, dy, x);
1648 console_conditional_schedule();
1649 dy++;
1650 }
1651 }
1652
1653 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1654 struct display *p, int line, int count, int ycount)
1655 {
1656 int offset = ycount * vc->vc_cols;
1657 unsigned short *d = (unsigned short *)
1658 (vc->vc_origin + vc->vc_size_row * line);
1659 unsigned short *s = d + offset;
1660 struct fbcon_ops *ops = info->fbcon_par;
1661
1662 while (count--) {
1663 unsigned short *start = s;
1664 unsigned short *le = advance_row(s, 1);
1665 unsigned short c;
1666 int x = 0;
1667
1668 do {
1669 c = scr_readw(s);
1670
1671 if (c == scr_readw(d)) {
1672 if (s > start) {
1673 ops->bmove(vc, info, line + ycount, x,
1674 line, x, 1, s-start);
1675 x += s - start + 1;
1676 start = s + 1;
1677 } else {
1678 x++;
1679 start++;
1680 }
1681 }
1682
1683 scr_writew(c, d);
1684 console_conditional_schedule();
1685 s++;
1686 d++;
1687 } while (s < le);
1688 if (s > start)
1689 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1690 s-start);
1691 console_conditional_schedule();
1692 if (ycount > 0)
1693 line++;
1694 else {
1695 line--;
1696 /* NOTE: We subtract two lines from these pointers */
1697 s -= vc->vc_size_row;
1698 d -= vc->vc_size_row;
1699 }
1700 }
1701 }
1702
1703 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1704 int line, int count, int offset)
1705 {
1706 unsigned short *d = (unsigned short *)
1707 (vc->vc_origin + vc->vc_size_row * line);
1708 unsigned short *s = d + offset;
1709
1710 while (count--) {
1711 unsigned short *start = s;
1712 unsigned short *le = advance_row(s, 1);
1713 unsigned short c;
1714 int x = 0;
1715 unsigned short attr = 1;
1716
1717 do {
1718 c = scr_readw(s);
1719 if (attr != (c & 0xff00)) {
1720 attr = c & 0xff00;
1721 if (s > start) {
1722 fbcon_putcs(vc, start, s - start,
1723 line, x);
1724 x += s - start;
1725 start = s;
1726 }
1727 }
1728 if (c == scr_readw(d)) {
1729 if (s > start) {
1730 fbcon_putcs(vc, start, s - start,
1731 line, x);
1732 x += s - start + 1;
1733 start = s + 1;
1734 } else {
1735 x++;
1736 start++;
1737 }
1738 }
1739 scr_writew(c, d);
1740 console_conditional_schedule();
1741 s++;
1742 d++;
1743 } while (s < le);
1744 if (s > start)
1745 fbcon_putcs(vc, start, s - start, line, x);
1746 console_conditional_schedule();
1747 if (offset > 0)
1748 line++;
1749 else {
1750 line--;
1751 /* NOTE: We subtract two lines from these pointers */
1752 s -= vc->vc_size_row;
1753 d -= vc->vc_size_row;
1754 }
1755 }
1756 }
1757
1758 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1759 int count)
1760 {
1761 unsigned short *p;
1762
1763 if (vc->vc_num != fg_console)
1764 return;
1765 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1766
1767 while (count) {
1768 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1769 count--;
1770 p = advance_row(p, 1);
1771 softback_in += vc->vc_size_row;
1772 if (softback_in == softback_end)
1773 softback_in = softback_buf;
1774 if (softback_in == softback_top) {
1775 softback_top += vc->vc_size_row;
1776 if (softback_top == softback_end)
1777 softback_top = softback_buf;
1778 }
1779 }
1780 softback_curr = softback_in;
1781 }
1782
1783 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1784 int count)
1785 {
1786 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1787 struct display *p = &fb_display[vc->vc_num];
1788 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1789
1790 if (fbcon_is_inactive(vc, info))
1791 return -EINVAL;
1792
1793 fbcon_cursor(vc, CM_ERASE);
1794
1795 /*
1796 * ++Geert: Only use ywrap/ypan if the console is in text mode
1797 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1798 * whole screen (prevents flicker).
1799 */
1800
1801 switch (dir) {
1802 case SM_UP:
1803 if (count > vc->vc_rows) /* Maximum realistic size */
1804 count = vc->vc_rows;
1805 if (softback_top)
1806 fbcon_softback_note(vc, t, count);
1807 if (logo_shown >= 0)
1808 goto redraw_up;
1809 switch (p->scrollmode) {
1810 case SCROLL_MOVE:
1811 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1812 count);
1813 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1814 scr_memsetw((unsigned short *) (vc->vc_origin +
1815 vc->vc_size_row *
1816 (b - count)),
1817 vc->vc_video_erase_char,
1818 vc->vc_size_row * count);
1819 return 1;
1820 break;
1821
1822 case SCROLL_WRAP_MOVE:
1823 if (b - t - count > 3 * vc->vc_rows >> 2) {
1824 if (t > 0)
1825 fbcon_bmove(vc, 0, 0, count, 0, t,
1826 vc->vc_cols);
1827 ywrap_up(vc, count);
1828 if (vc->vc_rows - b > 0)
1829 fbcon_bmove(vc, b - count, 0, b, 0,
1830 vc->vc_rows - b,
1831 vc->vc_cols);
1832 } else if (info->flags & FBINFO_READS_FAST)
1833 fbcon_bmove(vc, t + count, 0, t, 0,
1834 b - t - count, vc->vc_cols);
1835 else
1836 goto redraw_up;
1837 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1838 break;
1839
1840 case SCROLL_PAN_REDRAW:
1841 if ((p->yscroll + count <=
1842 2 * (p->vrows - vc->vc_rows))
1843 && ((!scroll_partial && (b - t == vc->vc_rows))
1844 || (scroll_partial
1845 && (b - t - count >
1846 3 * vc->vc_rows >> 2)))) {
1847 if (t > 0)
1848 fbcon_redraw_move(vc, p, 0, t, count);
1849 ypan_up_redraw(vc, t, count);
1850 if (vc->vc_rows - b > 0)
1851 fbcon_redraw_move(vc, p, b,
1852 vc->vc_rows - b, b);
1853 } else
1854 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1855 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1856 break;
1857
1858 case SCROLL_PAN_MOVE:
1859 if ((p->yscroll + count <=
1860 2 * (p->vrows - vc->vc_rows))
1861 && ((!scroll_partial && (b - t == vc->vc_rows))
1862 || (scroll_partial
1863 && (b - t - count >
1864 3 * vc->vc_rows >> 2)))) {
1865 if (t > 0)
1866 fbcon_bmove(vc, 0, 0, count, 0, t,
1867 vc->vc_cols);
1868 ypan_up(vc, count);
1869 if (vc->vc_rows - b > 0)
1870 fbcon_bmove(vc, b - count, 0, b, 0,
1871 vc->vc_rows - b,
1872 vc->vc_cols);
1873 } else if (info->flags & FBINFO_READS_FAST)
1874 fbcon_bmove(vc, t + count, 0, t, 0,
1875 b - t - count, vc->vc_cols);
1876 else
1877 goto redraw_up;
1878 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1879 break;
1880
1881 case SCROLL_REDRAW:
1882 redraw_up:
1883 fbcon_redraw(vc, p, t, b - t - count,
1884 count * vc->vc_cols);
1885 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1886 scr_memsetw((unsigned short *) (vc->vc_origin +
1887 vc->vc_size_row *
1888 (b - count)),
1889 vc->vc_video_erase_char,
1890 vc->vc_size_row * count);
1891 return 1;
1892 }
1893 break;
1894
1895 case SM_DOWN:
1896 if (count > vc->vc_rows) /* Maximum realistic size */
1897 count = vc->vc_rows;
1898 if (logo_shown >= 0)
1899 goto redraw_down;
1900 switch (p->scrollmode) {
1901 case SCROLL_MOVE:
1902 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1903 -count);
1904 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1905 scr_memsetw((unsigned short *) (vc->vc_origin +
1906 vc->vc_size_row *
1907 t),
1908 vc->vc_video_erase_char,
1909 vc->vc_size_row * count);
1910 return 1;
1911 break;
1912
1913 case SCROLL_WRAP_MOVE:
1914 if (b - t - count > 3 * vc->vc_rows >> 2) {
1915 if (vc->vc_rows - b > 0)
1916 fbcon_bmove(vc, b, 0, b - count, 0,
1917 vc->vc_rows - b,
1918 vc->vc_cols);
1919 ywrap_down(vc, count);
1920 if (t > 0)
1921 fbcon_bmove(vc, count, 0, 0, 0, t,
1922 vc->vc_cols);
1923 } else if (info->flags & FBINFO_READS_FAST)
1924 fbcon_bmove(vc, t, 0, t + count, 0,
1925 b - t - count, vc->vc_cols);
1926 else
1927 goto redraw_down;
1928 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1929 break;
1930
1931 case SCROLL_PAN_MOVE:
1932 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1933 && ((!scroll_partial && (b - t == vc->vc_rows))
1934 || (scroll_partial
1935 && (b - t - count >
1936 3 * vc->vc_rows >> 2)))) {
1937 if (vc->vc_rows - b > 0)
1938 fbcon_bmove(vc, b, 0, b - count, 0,
1939 vc->vc_rows - b,
1940 vc->vc_cols);
1941 ypan_down(vc, count);
1942 if (t > 0)
1943 fbcon_bmove(vc, count, 0, 0, 0, t,
1944 vc->vc_cols);
1945 } else if (info->flags & FBINFO_READS_FAST)
1946 fbcon_bmove(vc, t, 0, t + count, 0,
1947 b - t - count, vc->vc_cols);
1948 else
1949 goto redraw_down;
1950 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1951 break;
1952
1953 case SCROLL_PAN_REDRAW:
1954 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1955 && ((!scroll_partial && (b - t == vc->vc_rows))
1956 || (scroll_partial
1957 && (b - t - count >
1958 3 * vc->vc_rows >> 2)))) {
1959 if (vc->vc_rows - b > 0)
1960 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1961 b - count);
1962 ypan_down_redraw(vc, t, count);
1963 if (t > 0)
1964 fbcon_redraw_move(vc, p, count, t, 0);
1965 } else
1966 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1967 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1968 break;
1969
1970 case SCROLL_REDRAW:
1971 redraw_down:
1972 fbcon_redraw(vc, p, b - 1, b - t - count,
1973 -count * vc->vc_cols);
1974 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1975 scr_memsetw((unsigned short *) (vc->vc_origin +
1976 vc->vc_size_row *
1977 t),
1978 vc->vc_video_erase_char,
1979 vc->vc_size_row * count);
1980 return 1;
1981 }
1982 }
1983 return 0;
1984 }
1985
1986
1987 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1988 int height, int width)
1989 {
1990 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1991 struct display *p = &fb_display[vc->vc_num];
1992
1993 if (fbcon_is_inactive(vc, info))
1994 return;
1995
1996 if (!width || !height)
1997 return;
1998
1999 /* Split blits that cross physical y_wrap case.
2000 * Pathological case involves 4 blits, better to use recursive
2001 * code rather than unrolled case
2002 *
2003 * Recursive invocations don't need to erase the cursor over and
2004 * over again, so we use fbcon_bmove_rec()
2005 */
2006 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2007 p->vrows - p->yscroll);
2008 }
2009
2010 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2011 int dy, int dx, int height, int width, u_int y_break)
2012 {
2013 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2014 struct fbcon_ops *ops = info->fbcon_par;
2015 u_int b;
2016
2017 if (sy < y_break && sy + height > y_break) {
2018 b = y_break - sy;
2019 if (dy < sy) { /* Avoid trashing self */
2020 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2021 y_break);
2022 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2023 height - b, width, y_break);
2024 } else {
2025 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2026 height - b, width, y_break);
2027 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2028 y_break);
2029 }
2030 return;
2031 }
2032
2033 if (dy < y_break && dy + height > y_break) {
2034 b = y_break - dy;
2035 if (dy < sy) { /* Avoid trashing self */
2036 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2037 y_break);
2038 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2039 height - b, width, y_break);
2040 } else {
2041 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2042 height - b, width, y_break);
2043 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2044 y_break);
2045 }
2046 return;
2047 }
2048 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2049 height, width);
2050 }
2051
2052 static void updatescrollmode(struct display *p,
2053 struct fb_info *info,
2054 struct vc_data *vc)
2055 {
2056 struct fbcon_ops *ops = info->fbcon_par;
2057 int fh = vc->vc_font.height;
2058 int cap = info->flags;
2059 u16 t = 0;
2060 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2061 info->fix.xpanstep);
2062 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2063 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2064 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2065 info->var.xres_virtual);
2066 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2067 divides(ypan, vc->vc_font.height) && vyres > yres;
2068 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2069 divides(ywrap, vc->vc_font.height) &&
2070 divides(vc->vc_font.height, vyres) &&
2071 divides(vc->vc_font.height, yres);
2072 int reading_fast = cap & FBINFO_READS_FAST;
2073 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2074 !(cap & FBINFO_HWACCEL_DISABLED);
2075 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2076 !(cap & FBINFO_HWACCEL_DISABLED);
2077
2078 p->vrows = vyres/fh;
2079 if (yres > (fh * (vc->vc_rows + 1)))
2080 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2081 if ((yres % fh) && (vyres % fh < yres % fh))
2082 p->vrows--;
2083
2084 if (good_wrap || good_pan) {
2085 if (reading_fast || fast_copyarea)
2086 p->scrollmode = good_wrap ?
2087 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2088 else
2089 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2090 SCROLL_PAN_REDRAW;
2091 } else {
2092 if (reading_fast || (fast_copyarea && !fast_imageblit))
2093 p->scrollmode = SCROLL_MOVE;
2094 else
2095 p->scrollmode = SCROLL_REDRAW;
2096 }
2097 }
2098
2099 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2100 unsigned int height, unsigned int user)
2101 {
2102 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2103 struct fbcon_ops *ops = info->fbcon_par;
2104 struct display *p = &fb_display[vc->vc_num];
2105 struct fb_var_screeninfo var = info->var;
2106 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2107
2108 virt_w = FBCON_SWAP(ops->rotate, width, height);
2109 virt_h = FBCON_SWAP(ops->rotate, height, width);
2110 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2111 vc->vc_font.height);
2112 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2113 vc->vc_font.width);
2114 var.xres = virt_w * virt_fw;
2115 var.yres = virt_h * virt_fh;
2116 x_diff = info->var.xres - var.xres;
2117 y_diff = info->var.yres - var.yres;
2118 if (x_diff < 0 || x_diff > virt_fw ||
2119 y_diff < 0 || y_diff > virt_fh) {
2120 const struct fb_videomode *mode;
2121
2122 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2123 mode = fb_find_best_mode(&var, &info->modelist);
2124 if (mode == NULL)
2125 return -EINVAL;
2126 display_to_var(&var, p);
2127 fb_videomode_to_var(&var, mode);
2128
2129 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2130 return -EINVAL;
2131
2132 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2133 if (CON_IS_VISIBLE(vc)) {
2134 var.activate = FB_ACTIVATE_NOW |
2135 FB_ACTIVATE_FORCE;
2136 fb_set_var(info, &var);
2137 }
2138 var_to_display(p, &info->var, info);
2139 ops->var = info->var;
2140 }
2141 updatescrollmode(p, info, vc);
2142 return 0;
2143 }
2144
2145 static int fbcon_switch(struct vc_data *vc)
2146 {
2147 struct fb_info *info, *old_info = NULL;
2148 struct fbcon_ops *ops;
2149 struct display *p = &fb_display[vc->vc_num];
2150 struct fb_var_screeninfo var;
2151 int i, ret, prev_console, charcnt = 256;
2152
2153 info = registered_fb[con2fb_map[vc->vc_num]];
2154 ops = info->fbcon_par;
2155
2156 if (softback_top) {
2157 if (softback_lines)
2158 fbcon_set_origin(vc);
2159 softback_top = softback_curr = softback_in = softback_buf;
2160 softback_lines = 0;
2161 fbcon_update_softback(vc);
2162 }
2163
2164 if (logo_shown >= 0) {
2165 struct vc_data *conp2 = vc_cons[logo_shown].d;
2166
2167 if (conp2->vc_top == logo_lines
2168 && conp2->vc_bottom == conp2->vc_rows)
2169 conp2->vc_top = 0;
2170 logo_shown = FBCON_LOGO_CANSHOW;
2171 }
2172
2173 prev_console = ops->currcon;
2174 if (prev_console != -1)
2175 old_info = registered_fb[con2fb_map[prev_console]];
2176 /*
2177 * FIXME: If we have multiple fbdev's loaded, we need to
2178 * update all info->currcon. Perhaps, we can place this
2179 * in a centralized structure, but this might break some
2180 * drivers.
2181 *
2182 * info->currcon = vc->vc_num;
2183 */
2184 for (i = 0; i < FB_MAX; i++) {
2185 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2186 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2187
2188 o->currcon = vc->vc_num;
2189 }
2190 }
2191 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2192 display_to_var(&var, p);
2193 var.activate = FB_ACTIVATE_NOW;
2194
2195 /*
2196 * make sure we don't unnecessarily trip the memcmp()
2197 * in fb_set_var()
2198 */
2199 info->var.activate = var.activate;
2200 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2201 fb_set_var(info, &var);
2202 ops->var = info->var;
2203
2204 if (old_info != NULL && (old_info != info ||
2205 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2206 if (info->fbops->fb_set_par) {
2207 ret = info->fbops->fb_set_par(info);
2208
2209 if (ret)
2210 printk(KERN_ERR "fbcon_switch: detected "
2211 "unhandled fb_set_par error, "
2212 "error code %d\n", ret);
2213 }
2214
2215 if (old_info != info)
2216 fbcon_del_cursor_timer(old_info);
2217 }
2218
2219 if (fbcon_is_inactive(vc, info) ||
2220 ops->blank_state != FB_BLANK_UNBLANK)
2221 fbcon_del_cursor_timer(info);
2222 else
2223 fbcon_add_cursor_timer(info);
2224
2225 set_blitting_type(vc, info);
2226 ops->cursor_reset = 1;
2227
2228 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2229 ops->rotate = FB_ROTATE_UR;
2230 set_blitting_type(vc, info);
2231 }
2232
2233 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2234 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2235
2236 if (p->userfont)
2237 charcnt = FNTCHARCNT(vc->vc_font.data);
2238
2239 if (charcnt > 256)
2240 vc->vc_complement_mask <<= 1;
2241
2242 updatescrollmode(p, info, vc);
2243
2244 switch (p->scrollmode) {
2245 case SCROLL_WRAP_MOVE:
2246 scrollback_phys_max = p->vrows - vc->vc_rows;
2247 break;
2248 case SCROLL_PAN_MOVE:
2249 case SCROLL_PAN_REDRAW:
2250 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2251 if (scrollback_phys_max < 0)
2252 scrollback_phys_max = 0;
2253 break;
2254 default:
2255 scrollback_phys_max = 0;
2256 break;
2257 }
2258
2259 scrollback_max = 0;
2260 scrollback_current = 0;
2261
2262 if (!fbcon_is_inactive(vc, info)) {
2263 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2264 ops->update_start(info);
2265 }
2266
2267 fbcon_set_palette(vc, color_table);
2268 fbcon_clear_margins(vc, 0);
2269
2270 if (logo_shown == FBCON_LOGO_DRAW) {
2271
2272 logo_shown = fg_console;
2273 /* This is protected above by initmem_freed */
2274 fb_show_logo(info, ops->rotate);
2275 update_region(vc,
2276 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2277 vc->vc_size_row * (vc->vc_bottom -
2278 vc->vc_top) / 2);
2279 return 0;
2280 }
2281 return 1;
2282 }
2283
2284 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2285 int blank)
2286 {
2287 struct fb_event event;
2288
2289 if (blank) {
2290 unsigned short charmask = vc->vc_hi_font_mask ?
2291 0x1ff : 0xff;
2292 unsigned short oldc;
2293
2294 oldc = vc->vc_video_erase_char;
2295 vc->vc_video_erase_char &= charmask;
2296 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2297 vc->vc_video_erase_char = oldc;
2298 }
2299
2300
2301 if (!lock_fb_info(info))
2302 return;
2303 event.info = info;
2304 event.data = &blank;
2305 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2306 unlock_fb_info(info);
2307 }
2308
2309 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2310 {
2311 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2312 struct fbcon_ops *ops = info->fbcon_par;
2313
2314 if (mode_switch) {
2315 struct fb_var_screeninfo var = info->var;
2316
2317 ops->graphics = 1;
2318
2319 if (!blank) {
2320 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2321 fb_set_var(info, &var);
2322 ops->graphics = 0;
2323 ops->var = info->var;
2324 }
2325 }
2326
2327 if (!fbcon_is_inactive(vc, info)) {
2328 if (ops->blank_state != blank) {
2329 ops->blank_state = blank;
2330 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2331 ops->cursor_flash = (!blank);
2332
2333 if (!(info->flags & FBINFO_MISC_USEREVENT))
2334 if (fb_blank(info, blank))
2335 fbcon_generic_blank(vc, info, blank);
2336 }
2337
2338 if (!blank)
2339 update_screen(vc);
2340 }
2341
2342 if (mode_switch || fbcon_is_inactive(vc, info) ||
2343 ops->blank_state != FB_BLANK_UNBLANK)
2344 fbcon_del_cursor_timer(info);
2345 else
2346 fbcon_add_cursor_timer(info);
2347
2348 return 0;
2349 }
2350
2351 static int fbcon_debug_enter(struct vc_data *vc)
2352 {
2353 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2354 struct fbcon_ops *ops = info->fbcon_par;
2355
2356 ops->save_graphics = ops->graphics;
2357 ops->graphics = 0;
2358 if (info->fbops->fb_debug_enter)
2359 info->fbops->fb_debug_enter(info);
2360 fbcon_set_palette(vc, color_table);
2361 return 0;
2362 }
2363
2364 static int fbcon_debug_leave(struct vc_data *vc)
2365 {
2366 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2367 struct fbcon_ops *ops = info->fbcon_par;
2368
2369 ops->graphics = ops->save_graphics;
2370 if (info->fbops->fb_debug_leave)
2371 info->fbops->fb_debug_leave(info);
2372 return 0;
2373 }
2374
2375 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2376 {
2377 u8 *fontdata = vc->vc_font.data;
2378 u8 *data = font->data;
2379 int i, j;
2380
2381 font->width = vc->vc_font.width;
2382 font->height = vc->vc_font.height;
2383 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2384 if (!font->data)
2385 return 0;
2386
2387 if (font->width <= 8) {
2388 j = vc->vc_font.height;
2389 for (i = 0; i < font->charcount; i++) {
2390 memcpy(data, fontdata, j);
2391 memset(data + j, 0, 32 - j);
2392 data += 32;
2393 fontdata += j;
2394 }
2395 } else if (font->width <= 16) {
2396 j = vc->vc_font.height * 2;
2397 for (i = 0; i < font->charcount; i++) {
2398 memcpy(data, fontdata, j);
2399 memset(data + j, 0, 64 - j);
2400 data += 64;
2401 fontdata += j;
2402 }
2403 } else if (font->width <= 24) {
2404 for (i = 0; i < font->charcount; i++) {
2405 for (j = 0; j < vc->vc_font.height; j++) {
2406 *data++ = fontdata[0];
2407 *data++ = fontdata[1];
2408 *data++ = fontdata[2];
2409 fontdata += sizeof(u32);
2410 }
2411 memset(data, 0, 3 * (32 - j));
2412 data += 3 * (32 - j);
2413 }
2414 } else {
2415 j = vc->vc_font.height * 4;
2416 for (i = 0; i < font->charcount; i++) {
2417 memcpy(data, fontdata, j);
2418 memset(data + j, 0, 128 - j);
2419 data += 128;
2420 fontdata += j;
2421 }
2422 }
2423 return 0;
2424 }
2425
2426 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2427 const u8 * data, int userfont)
2428 {
2429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2430 struct fbcon_ops *ops = info->fbcon_par;
2431 struct display *p = &fb_display[vc->vc_num];
2432 int resize;
2433 int cnt;
2434 char *old_data = NULL;
2435
2436 if (CON_IS_VISIBLE(vc) && softback_lines)
2437 fbcon_set_origin(vc);
2438
2439 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2440 if (p->userfont)
2441 old_data = vc->vc_font.data;
2442 if (userfont)
2443 cnt = FNTCHARCNT(data);
2444 else
2445 cnt = 256;
2446 vc->vc_font.data = (void *)(p->fontdata = data);
2447 if ((p->userfont = userfont))
2448 REFCOUNT(data)++;
2449 vc->vc_font.width = w;
2450 vc->vc_font.height = h;
2451 if (vc->vc_hi_font_mask && cnt == 256) {
2452 vc->vc_hi_font_mask = 0;
2453 if (vc->vc_can_do_color) {
2454 vc->vc_complement_mask >>= 1;
2455 vc->vc_s_complement_mask >>= 1;
2456 }
2457
2458 /* ++Edmund: reorder the attribute bits */
2459 if (vc->vc_can_do_color) {
2460 unsigned short *cp =
2461 (unsigned short *) vc->vc_origin;
2462 int count = vc->vc_screenbuf_size / 2;
2463 unsigned short c;
2464 for (; count > 0; count--, cp++) {
2465 c = scr_readw(cp);
2466 scr_writew(((c & 0xfe00) >> 1) |
2467 (c & 0xff), cp);
2468 }
2469 c = vc->vc_video_erase_char;
2470 vc->vc_video_erase_char =
2471 ((c & 0xfe00) >> 1) | (c & 0xff);
2472 vc->vc_attr >>= 1;
2473 }
2474 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2475 vc->vc_hi_font_mask = 0x100;
2476 if (vc->vc_can_do_color) {
2477 vc->vc_complement_mask <<= 1;
2478 vc->vc_s_complement_mask <<= 1;
2479 }
2480
2481 /* ++Edmund: reorder the attribute bits */
2482 {
2483 unsigned short *cp =
2484 (unsigned short *) vc->vc_origin;
2485 int count = vc->vc_screenbuf_size / 2;
2486 unsigned short c;
2487 for (; count > 0; count--, cp++) {
2488 unsigned short newc;
2489 c = scr_readw(cp);
2490 if (vc->vc_can_do_color)
2491 newc =
2492 ((c & 0xff00) << 1) | (c &
2493 0xff);
2494 else
2495 newc = c & ~0x100;
2496 scr_writew(newc, cp);
2497 }
2498 c = vc->vc_video_erase_char;
2499 if (vc->vc_can_do_color) {
2500 vc->vc_video_erase_char =
2501 ((c & 0xff00) << 1) | (c & 0xff);
2502 vc->vc_attr <<= 1;
2503 } else
2504 vc->vc_video_erase_char = c & ~0x100;
2505 }
2506
2507 }
2508
2509 if (resize) {
2510 int cols, rows;
2511
2512 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2513 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2514 cols /= w;
2515 rows /= h;
2516 vc_resize(vc, cols, rows);
2517 if (CON_IS_VISIBLE(vc) && softback_buf)
2518 fbcon_update_softback(vc);
2519 } else if (CON_IS_VISIBLE(vc)
2520 && vc->vc_mode == KD_TEXT) {
2521 fbcon_clear_margins(vc, 0);
2522 update_screen(vc);
2523 }
2524
2525 if (old_data && (--REFCOUNT(old_data) == 0))
2526 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2527 return 0;
2528 }
2529
2530 static int fbcon_copy_font(struct vc_data *vc, int con)
2531 {
2532 struct display *od = &fb_display[con];
2533 struct console_font *f = &vc->vc_font;
2534
2535 if (od->fontdata == f->data)
2536 return 0; /* already the same font... */
2537 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2538 }
2539
2540 /*
2541 * User asked to set font; we are guaranteed that
2542 * a) width and height are in range 1..32
2543 * b) charcount does not exceed 512
2544 * but lets not assume that, since someone might someday want to use larger
2545 * fonts. And charcount of 512 is small for unicode support.
2546 *
2547 * However, user space gives the font in 32 rows , regardless of
2548 * actual font height. So a new API is needed if support for larger fonts
2549 * is ever implemented.
2550 */
2551
2552 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2553 {
2554 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2555 unsigned charcount = font->charcount;
2556 int w = font->width;
2557 int h = font->height;
2558 int size;
2559 int i, csum;
2560 u8 *new_data, *data = font->data;
2561 int pitch = (font->width+7) >> 3;
2562
2563 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2564 * If not this check should be changed to charcount < 256 */
2565 if (charcount != 256 && charcount != 512)
2566 return -EINVAL;
2567
2568 /* Make sure drawing engine can handle the font */
2569 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2570 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2571 return -EINVAL;
2572
2573 /* Make sure driver can handle the font length */
2574 if (fbcon_invalid_charcount(info, charcount))
2575 return -EINVAL;
2576
2577 size = h * pitch * charcount;
2578
2579 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2580
2581 if (!new_data)
2582 return -ENOMEM;
2583
2584 new_data += FONT_EXTRA_WORDS * sizeof(int);
2585 FNTSIZE(new_data) = size;
2586 FNTCHARCNT(new_data) = charcount;
2587 REFCOUNT(new_data) = 0; /* usage counter */
2588 for (i=0; i< charcount; i++) {
2589 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2590 }
2591
2592 /* Since linux has a nice crc32 function use it for counting font
2593 * checksums. */
2594 csum = crc32(0, new_data, size);
2595
2596 FNTSUM(new_data) = csum;
2597 /* Check if the same font is on some other console already */
2598 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2599 struct vc_data *tmp = vc_cons[i].d;
2600
2601 if (fb_display[i].userfont &&
2602 fb_display[i].fontdata &&
2603 FNTSUM(fb_display[i].fontdata) == csum &&
2604 FNTSIZE(fb_display[i].fontdata) == size &&
2605 tmp->vc_font.width == w &&
2606 !memcmp(fb_display[i].fontdata, new_data, size)) {
2607 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2608 new_data = (u8 *)fb_display[i].fontdata;
2609 break;
2610 }
2611 }
2612 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2613 }
2614
2615 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2616 {
2617 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2618 const struct font_desc *f;
2619
2620 if (!name)
2621 f = get_default_font(info->var.xres, info->var.yres,
2622 info->pixmap.blit_x, info->pixmap.blit_y);
2623 else if (!(f = find_font(name)))
2624 return -ENOENT;
2625
2626 font->width = f->width;
2627 font->height = f->height;
2628 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2629 }
2630
2631 static u16 palette_red[16];
2632 static u16 palette_green[16];
2633 static u16 palette_blue[16];
2634
2635 static struct fb_cmap palette_cmap = {
2636 0, 16, palette_red, palette_green, palette_blue, NULL
2637 };
2638
2639 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2640 {
2641 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2642 int i, j, k, depth;
2643 u8 val;
2644
2645 if (fbcon_is_inactive(vc, info))
2646 return -EINVAL;
2647
2648 if (!CON_IS_VISIBLE(vc))
2649 return 0;
2650
2651 depth = fb_get_color_depth(&info->var, &info->fix);
2652 if (depth > 3) {
2653 for (i = j = 0; i < 16; i++) {
2654 k = table[i];
2655 val = vc->vc_palette[j++];
2656 palette_red[k] = (val << 8) | val;
2657 val = vc->vc_palette[j++];
2658 palette_green[k] = (val << 8) | val;
2659 val = vc->vc_palette[j++];
2660 palette_blue[k] = (val << 8) | val;
2661 }
2662 palette_cmap.len = 16;
2663 palette_cmap.start = 0;
2664 /*
2665 * If framebuffer is capable of less than 16 colors,
2666 * use default palette of fbcon.
2667 */
2668 } else
2669 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2670
2671 return fb_set_cmap(&palette_cmap, info);
2672 }
2673
2674 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2675 {
2676 unsigned long p;
2677 int line;
2678
2679 if (vc->vc_num != fg_console || !softback_lines)
2680 return (u16 *) (vc->vc_origin + offset);
2681 line = offset / vc->vc_size_row;
2682 if (line >= softback_lines)
2683 return (u16 *) (vc->vc_origin + offset -
2684 softback_lines * vc->vc_size_row);
2685 p = softback_curr + offset;
2686 if (p >= softback_end)
2687 p += softback_buf - softback_end;
2688 return (u16 *) p;
2689 }
2690
2691 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2692 int *px, int *py)
2693 {
2694 unsigned long ret;
2695 int x, y;
2696
2697 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2698 unsigned long offset = (pos - vc->vc_origin) / 2;
2699
2700 x = offset % vc->vc_cols;
2701 y = offset / vc->vc_cols;
2702 if (vc->vc_num == fg_console)
2703 y += softback_lines;
2704 ret = pos + (vc->vc_cols - x) * 2;
2705 } else if (vc->vc_num == fg_console && softback_lines) {
2706 unsigned long offset = pos - softback_curr;
2707
2708 if (pos < softback_curr)
2709 offset += softback_end - softback_buf;
2710 offset /= 2;
2711 x = offset % vc->vc_cols;
2712 y = offset / vc->vc_cols;
2713 ret = pos + (vc->vc_cols - x) * 2;
2714 if (ret == softback_end)
2715 ret = softback_buf;
2716 if (ret == softback_in)
2717 ret = vc->vc_origin;
2718 } else {
2719 /* Should not happen */
2720 x = y = 0;
2721 ret = vc->vc_origin;
2722 }
2723 if (px)
2724 *px = x;
2725 if (py)
2726 *py = y;
2727 return ret;
2728 }
2729
2730 /* As we might be inside of softback, we may work with non-contiguous buffer,
2731 that's why we have to use a separate routine. */
2732 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2733 {
2734 while (cnt--) {
2735 u16 a = scr_readw(p);
2736 if (!vc->vc_can_do_color)
2737 a ^= 0x0800;
2738 else if (vc->vc_hi_font_mask == 0x100)
2739 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2740 (((a) & 0x0e00) << 4);
2741 else
2742 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2743 (((a) & 0x0700) << 4);
2744 scr_writew(a, p++);
2745 if (p == (u16 *) softback_end)
2746 p = (u16 *) softback_buf;
2747 if (p == (u16 *) softback_in)
2748 p = (u16 *) vc->vc_origin;
2749 }
2750 }
2751
2752 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2753 {
2754 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2755 struct fbcon_ops *ops = info->fbcon_par;
2756 struct display *disp = &fb_display[fg_console];
2757 int offset, limit, scrollback_old;
2758
2759 if (softback_top) {
2760 if (vc->vc_num != fg_console)
2761 return 0;
2762 if (vc->vc_mode != KD_TEXT || !lines)
2763 return 0;
2764 if (logo_shown >= 0) {
2765 struct vc_data *conp2 = vc_cons[logo_shown].d;
2766
2767 if (conp2->vc_top == logo_lines
2768 && conp2->vc_bottom == conp2->vc_rows)
2769 conp2->vc_top = 0;
2770 if (logo_shown == vc->vc_num) {
2771 unsigned long p, q;
2772 int i;
2773
2774 p = softback_in;
2775 q = vc->vc_origin +
2776 logo_lines * vc->vc_size_row;
2777 for (i = 0; i < logo_lines; i++) {
2778 if (p == softback_top)
2779 break;
2780 if (p == softback_buf)
2781 p = softback_end;
2782 p -= vc->vc_size_row;
2783 q -= vc->vc_size_row;
2784 scr_memcpyw((u16 *) q, (u16 *) p,
2785 vc->vc_size_row);
2786 }
2787 softback_in = softback_curr = p;
2788 update_region(vc, vc->vc_origin,
2789 logo_lines * vc->vc_cols);
2790 }
2791 logo_shown = FBCON_LOGO_CANSHOW;
2792 }
2793 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2794 fbcon_redraw_softback(vc, disp, lines);
2795 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2796 return 0;
2797 }
2798
2799 if (!scrollback_phys_max)
2800 return -ENOSYS;
2801
2802 scrollback_old = scrollback_current;
2803 scrollback_current -= lines;
2804 if (scrollback_current < 0)
2805 scrollback_current = 0;
2806 else if (scrollback_current > scrollback_max)
2807 scrollback_current = scrollback_max;
2808 if (scrollback_current == scrollback_old)
2809 return 0;
2810
2811 if (fbcon_is_inactive(vc, info))
2812 return 0;
2813
2814 fbcon_cursor(vc, CM_ERASE);
2815
2816 offset = disp->yscroll - scrollback_current;
2817 limit = disp->vrows;
2818 switch (disp->scrollmode) {
2819 case SCROLL_WRAP_MOVE:
2820 info->var.vmode |= FB_VMODE_YWRAP;
2821 break;
2822 case SCROLL_PAN_MOVE:
2823 case SCROLL_PAN_REDRAW:
2824 limit -= vc->vc_rows;
2825 info->var.vmode &= ~FB_VMODE_YWRAP;
2826 break;
2827 }
2828 if (offset < 0)
2829 offset += limit;
2830 else if (offset >= limit)
2831 offset -= limit;
2832
2833 ops->var.xoffset = 0;
2834 ops->var.yoffset = offset * vc->vc_font.height;
2835 ops->update_start(info);
2836
2837 if (!scrollback_current)
2838 fbcon_cursor(vc, CM_DRAW);
2839 return 0;
2840 }
2841
2842 static int fbcon_set_origin(struct vc_data *vc)
2843 {
2844 if (softback_lines)
2845 fbcon_scrolldelta(vc, softback_lines);
2846 return 0;
2847 }
2848
2849 static void fbcon_suspended(struct fb_info *info)
2850 {
2851 struct vc_data *vc = NULL;
2852 struct fbcon_ops *ops = info->fbcon_par;
2853
2854 if (!ops || ops->currcon < 0)
2855 return;
2856 vc = vc_cons[ops->currcon].d;
2857
2858 /* Clear cursor, restore saved data */
2859 fbcon_cursor(vc, CM_ERASE);
2860 }
2861
2862 static void fbcon_resumed(struct fb_info *info)
2863 {
2864 struct vc_data *vc;
2865 struct fbcon_ops *ops = info->fbcon_par;
2866
2867 if (!ops || ops->currcon < 0)
2868 return;
2869 vc = vc_cons[ops->currcon].d;
2870
2871 update_screen(vc);
2872 }
2873
2874 static void fbcon_modechanged(struct fb_info *info)
2875 {
2876 struct fbcon_ops *ops = info->fbcon_par;
2877 struct vc_data *vc;
2878 struct display *p;
2879 int rows, cols;
2880
2881 if (!ops || ops->currcon < 0)
2882 return;
2883 vc = vc_cons[ops->currcon].d;
2884 if (vc->vc_mode != KD_TEXT ||
2885 registered_fb[con2fb_map[ops->currcon]] != info)
2886 return;
2887
2888 p = &fb_display[vc->vc_num];
2889 set_blitting_type(vc, info);
2890
2891 if (CON_IS_VISIBLE(vc)) {
2892 var_to_display(p, &info->var, info);
2893 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2894 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2895 cols /= vc->vc_font.width;
2896 rows /= vc->vc_font.height;
2897 vc_resize(vc, cols, rows);
2898 updatescrollmode(p, info, vc);
2899 scrollback_max = 0;
2900 scrollback_current = 0;
2901
2902 if (!fbcon_is_inactive(vc, info)) {
2903 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2904 ops->update_start(info);
2905 }
2906
2907 fbcon_set_palette(vc, color_table);
2908 update_screen(vc);
2909 if (softback_buf)
2910 fbcon_update_softback(vc);
2911 }
2912 }
2913
2914 static void fbcon_set_all_vcs(struct fb_info *info)
2915 {
2916 struct fbcon_ops *ops = info->fbcon_par;
2917 struct vc_data *vc;
2918 struct display *p;
2919 int i, rows, cols, fg = -1;
2920
2921 if (!ops || ops->currcon < 0)
2922 return;
2923
2924 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2925 vc = vc_cons[i].d;
2926 if (!vc || vc->vc_mode != KD_TEXT ||
2927 registered_fb[con2fb_map[i]] != info)
2928 continue;
2929
2930 if (CON_IS_VISIBLE(vc)) {
2931 fg = i;
2932 continue;
2933 }
2934
2935 p = &fb_display[vc->vc_num];
2936 set_blitting_type(vc, info);
2937 var_to_display(p, &info->var, info);
2938 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2939 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2940 cols /= vc->vc_font.width;
2941 rows /= vc->vc_font.height;
2942 vc_resize(vc, cols, rows);
2943 }
2944
2945 if (fg != -1)
2946 fbcon_modechanged(info);
2947 }
2948
2949 static int fbcon_mode_deleted(struct fb_info *info,
2950 struct fb_videomode *mode)
2951 {
2952 struct fb_info *fb_info;
2953 struct display *p;
2954 int i, j, found = 0;
2955
2956 /* before deletion, ensure that mode is not in use */
2957 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2958 j = con2fb_map[i];
2959 if (j == -1)
2960 continue;
2961 fb_info = registered_fb[j];
2962 if (fb_info != info)
2963 continue;
2964 p = &fb_display[i];
2965 if (!p || !p->mode)
2966 continue;
2967 if (fb_mode_is_equal(p->mode, mode)) {
2968 found = 1;
2969 break;
2970 }
2971 }
2972 return found;
2973 }
2974
2975 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2976 static int fbcon_unbind(void)
2977 {
2978 int ret;
2979
2980 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2981 fbcon_is_default);
2982
2983 if (!ret)
2984 fbcon_has_console_bind = 0;
2985
2986 return ret;
2987 }
2988 #else
2989 static inline int fbcon_unbind(void)
2990 {
2991 return -EINVAL;
2992 }
2993 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2994
2995 static int fbcon_fb_unbind(int idx)
2996 {
2997 int i, new_idx = -1, ret = 0;
2998
2999 if (!fbcon_has_console_bind)
3000 return 0;
3001
3002 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3003 if (con2fb_map[i] != idx &&
3004 con2fb_map[i] != -1) {
3005 new_idx = i;
3006 break;
3007 }
3008 }
3009
3010 if (new_idx != -1) {
3011 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3012 if (con2fb_map[i] == idx)
3013 set_con2fb_map(i, new_idx, 0);
3014 }
3015 } else
3016 ret = fbcon_unbind();
3017
3018 return ret;
3019 }
3020
3021 static int fbcon_fb_unregistered(struct fb_info *info)
3022 {
3023 int i, idx;
3024
3025 idx = info->node;
3026 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3027 if (con2fb_map[i] == idx)
3028 con2fb_map[i] = -1;
3029 }
3030
3031 if (idx == info_idx) {
3032 info_idx = -1;
3033
3034 for (i = 0; i < FB_MAX; i++) {
3035 if (registered_fb[i] != NULL) {
3036 info_idx = i;
3037 break;
3038 }
3039 }
3040 }
3041
3042 if (info_idx != -1) {
3043 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3044 if (con2fb_map[i] == -1)
3045 con2fb_map[i] = info_idx;
3046 }
3047 }
3048
3049 if (primary_device == idx)
3050 primary_device = -1;
3051
3052 if (!num_registered_fb)
3053 unregister_con_driver(&fb_con);
3054
3055 return 0;
3056 }
3057
3058 static void fbcon_remap_all(int idx)
3059 {
3060 int i;
3061 for (i = first_fb_vc; i <= last_fb_vc; i++)
3062 set_con2fb_map(i, idx, 0);
3063
3064 if (con_is_bound(&fb_con)) {
3065 printk(KERN_INFO "fbcon: Remapping primary device, "
3066 "fb%i, to tty %i-%i\n", idx,
3067 first_fb_vc + 1, last_fb_vc + 1);
3068 info_idx = idx;
3069 }
3070 }
3071
3072 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3073 static void fbcon_select_primary(struct fb_info *info)
3074 {
3075 if (!map_override && primary_device == -1 &&
3076 fb_is_primary_device(info)) {
3077 int i;
3078
3079 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3080 info->fix.id, info->node);
3081 primary_device = info->node;
3082
3083 for (i = first_fb_vc; i <= last_fb_vc; i++)
3084 con2fb_map_boot[i] = primary_device;
3085
3086 if (con_is_bound(&fb_con)) {
3087 printk(KERN_INFO "fbcon: Remapping primary device, "
3088 "fb%i, to tty %i-%i\n", info->node,
3089 first_fb_vc + 1, last_fb_vc + 1);
3090 info_idx = primary_device;
3091 }
3092 }
3093
3094 }
3095 #else
3096 static inline void fbcon_select_primary(struct fb_info *info)
3097 {
3098 return;
3099 }
3100 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3101
3102 static int fbcon_fb_registered(struct fb_info *info)
3103 {
3104 int ret = 0, i, idx;
3105
3106 idx = info->node;
3107 fbcon_select_primary(info);
3108
3109 if (info_idx == -1) {
3110 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3111 if (con2fb_map_boot[i] == idx) {
3112 info_idx = idx;
3113 break;
3114 }
3115 }
3116
3117 if (info_idx != -1)
3118 ret = fbcon_takeover(1);
3119 } else {
3120 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3121 if (con2fb_map_boot[i] == idx)
3122 set_con2fb_map(i, idx, 0);
3123 }
3124 }
3125
3126 return ret;
3127 }
3128
3129 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3130 {
3131 struct fbcon_ops *ops = info->fbcon_par;
3132 struct vc_data *vc;
3133
3134 if (!ops || ops->currcon < 0)
3135 return;
3136
3137 vc = vc_cons[ops->currcon].d;
3138 if (vc->vc_mode != KD_TEXT ||
3139 registered_fb[con2fb_map[ops->currcon]] != info)
3140 return;
3141
3142 if (CON_IS_VISIBLE(vc)) {
3143 if (blank)
3144 do_blank_screen(0);
3145 else
3146 do_unblank_screen(0);
3147 }
3148 ops->blank_state = blank;
3149 }
3150
3151 static void fbcon_new_modelist(struct fb_info *info)
3152 {
3153 int i;
3154 struct vc_data *vc;
3155 struct fb_var_screeninfo var;
3156 const struct fb_videomode *mode;
3157
3158 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3159 if (registered_fb[con2fb_map[i]] != info)
3160 continue;
3161 if (!fb_display[i].mode)
3162 continue;
3163 vc = vc_cons[i].d;
3164 display_to_var(&var, &fb_display[i]);
3165 mode = fb_find_nearest_mode(fb_display[i].mode,
3166 &info->modelist);
3167 fb_videomode_to_var(&var, mode);
3168 fbcon_set_disp(info, &var, vc->vc_num);
3169 }
3170 }
3171
3172 static void fbcon_get_requirement(struct fb_info *info,
3173 struct fb_blit_caps *caps)
3174 {
3175 struct vc_data *vc;
3176 struct display *p;
3177
3178 if (caps->flags) {
3179 int i, charcnt;
3180
3181 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3182 vc = vc_cons[i].d;
3183 if (vc && vc->vc_mode == KD_TEXT &&
3184 info->node == con2fb_map[i]) {
3185 p = &fb_display[i];
3186 caps->x |= 1 << (vc->vc_font.width - 1);
3187 caps->y |= 1 << (vc->vc_font.height - 1);
3188 charcnt = (p->userfont) ?
3189 FNTCHARCNT(p->fontdata) : 256;
3190 if (caps->len < charcnt)
3191 caps->len = charcnt;
3192 }
3193 }
3194 } else {
3195 vc = vc_cons[fg_console].d;
3196
3197 if (vc && vc->vc_mode == KD_TEXT &&
3198 info->node == con2fb_map[fg_console]) {
3199 p = &fb_display[fg_console];
3200 caps->x = 1 << (vc->vc_font.width - 1);
3201 caps->y = 1 << (vc->vc_font.height - 1);
3202 caps->len = (p->userfont) ?
3203 FNTCHARCNT(p->fontdata) : 256;
3204 }
3205 }
3206 }
3207
3208 static int fbcon_event_notify(struct notifier_block *self,
3209 unsigned long action, void *data)
3210 {
3211 struct fb_event *event = data;
3212 struct fb_info *info = event->info;
3213 struct fb_videomode *mode;
3214 struct fb_con2fbmap *con2fb;
3215 struct fb_blit_caps *caps;
3216 int idx, ret = 0;
3217
3218 /*
3219 * ignore all events except driver registration and deregistration
3220 * if fbcon is not active
3221 */
3222 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3223 action == FB_EVENT_FB_UNREGISTERED))
3224 goto done;
3225
3226 switch(action) {
3227 case FB_EVENT_SUSPEND:
3228 fbcon_suspended(info);
3229 break;
3230 case FB_EVENT_RESUME:
3231 fbcon_resumed(info);
3232 break;
3233 case FB_EVENT_MODE_CHANGE:
3234 fbcon_modechanged(info);
3235 break;
3236 case FB_EVENT_MODE_CHANGE_ALL:
3237 fbcon_set_all_vcs(info);
3238 break;
3239 case FB_EVENT_MODE_DELETE:
3240 mode = event->data;
3241 ret = fbcon_mode_deleted(info, mode);
3242 break;
3243 case FB_EVENT_FB_UNBIND:
3244 idx = info->node;
3245 ret = fbcon_fb_unbind(idx);
3246 break;
3247 case FB_EVENT_FB_REGISTERED:
3248 ret = fbcon_fb_registered(info);
3249 break;
3250 case FB_EVENT_FB_UNREGISTERED:
3251 ret = fbcon_fb_unregistered(info);
3252 break;
3253 case FB_EVENT_SET_CONSOLE_MAP:
3254 con2fb = event->data;
3255 ret = set_con2fb_map(con2fb->console - 1,
3256 con2fb->framebuffer, 1);
3257 break;
3258 case FB_EVENT_GET_CONSOLE_MAP:
3259 con2fb = event->data;
3260 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3261 break;
3262 case FB_EVENT_BLANK:
3263 fbcon_fb_blanked(info, *(int *)event->data);
3264 break;
3265 case FB_EVENT_NEW_MODELIST:
3266 fbcon_new_modelist(info);
3267 break;
3268 case FB_EVENT_GET_REQ:
3269 caps = event->data;
3270 fbcon_get_requirement(info, caps);
3271 break;
3272 case FB_EVENT_REMAP_ALL_CONSOLE:
3273 idx = info->node;
3274 fbcon_remap_all(idx);
3275 break;
3276 }
3277 done:
3278 return ret;
3279 }
3280
3281 /*
3282 * The console `switch' structure for the frame buffer based console
3283 */
3284
3285 static const struct consw fb_con = {
3286 .owner = THIS_MODULE,
3287 .con_startup = fbcon_startup,
3288 .con_init = fbcon_init,
3289 .con_deinit = fbcon_deinit,
3290 .con_clear = fbcon_clear,
3291 .con_putc = fbcon_putc,
3292 .con_putcs = fbcon_putcs,
3293 .con_cursor = fbcon_cursor,
3294 .con_scroll = fbcon_scroll,
3295 .con_bmove = fbcon_bmove,
3296 .con_switch = fbcon_switch,
3297 .con_blank = fbcon_blank,
3298 .con_font_set = fbcon_set_font,
3299 .con_font_get = fbcon_get_font,
3300 .con_font_default = fbcon_set_def_font,
3301 .con_font_copy = fbcon_copy_font,
3302 .con_set_palette = fbcon_set_palette,
3303 .con_scrolldelta = fbcon_scrolldelta,
3304 .con_set_origin = fbcon_set_origin,
3305 .con_invert_region = fbcon_invert_region,
3306 .con_screen_pos = fbcon_screen_pos,
3307 .con_getxy = fbcon_getxy,
3308 .con_resize = fbcon_resize,
3309 .con_debug_enter = fbcon_debug_enter,
3310 .con_debug_leave = fbcon_debug_leave,
3311 };
3312
3313 static struct notifier_block fbcon_event_notifier = {
3314 .notifier_call = fbcon_event_notify,
3315 };
3316
3317 static ssize_t store_rotate(struct device *device,
3318 struct device_attribute *attr, const char *buf,
3319 size_t count)
3320 {
3321 struct fb_info *info;
3322 int rotate, idx;
3323 char **last = NULL;
3324
3325 if (fbcon_has_exited)
3326 return count;
3327
3328 console_lock();
3329 idx = con2fb_map[fg_console];
3330
3331 if (idx == -1 || registered_fb[idx] == NULL)
3332 goto err;
3333
3334 info = registered_fb[idx];
3335 rotate = simple_strtoul(buf, last, 0);
3336 fbcon_rotate(info, rotate);
3337 err:
3338 console_unlock();
3339 return count;
3340 }
3341
3342 static ssize_t store_rotate_all(struct device *device,
3343 struct device_attribute *attr,const char *buf,
3344 size_t count)
3345 {
3346 struct fb_info *info;
3347 int rotate, idx;
3348 char **last = NULL;
3349
3350 if (fbcon_has_exited)
3351 return count;
3352
3353 console_lock();
3354 idx = con2fb_map[fg_console];
3355
3356 if (idx == -1 || registered_fb[idx] == NULL)
3357 goto err;
3358
3359 info = registered_fb[idx];
3360 rotate = simple_strtoul(buf, last, 0);
3361 fbcon_rotate_all(info, rotate);
3362 err:
3363 console_unlock();
3364 return count;
3365 }
3366
3367 static ssize_t show_rotate(struct device *device,
3368 struct device_attribute *attr,char *buf)
3369 {
3370 struct fb_info *info;
3371 int rotate = 0, idx;
3372
3373 if (fbcon_has_exited)
3374 return 0;
3375
3376 console_lock();
3377 idx = con2fb_map[fg_console];
3378
3379 if (idx == -1 || registered_fb[idx] == NULL)
3380 goto err;
3381
3382 info = registered_fb[idx];
3383 rotate = fbcon_get_rotate(info);
3384 err:
3385 console_unlock();
3386 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3387 }
3388
3389 static ssize_t show_cursor_blink(struct device *device,
3390 struct device_attribute *attr, char *buf)
3391 {
3392 struct fb_info *info;
3393 struct fbcon_ops *ops;
3394 int idx, blink = -1;
3395
3396 if (fbcon_has_exited)
3397 return 0;
3398
3399 console_lock();
3400 idx = con2fb_map[fg_console];
3401
3402 if (idx == -1 || registered_fb[idx] == NULL)
3403 goto err;
3404
3405 info = registered_fb[idx];
3406 ops = info->fbcon_par;
3407
3408 if (!ops)
3409 goto err;
3410
3411 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3412 err:
3413 console_unlock();
3414 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3415 }
3416
3417 static ssize_t store_cursor_blink(struct device *device,
3418 struct device_attribute *attr,
3419 const char *buf, size_t count)
3420 {
3421 struct fb_info *info;
3422 int blink, idx;
3423 char **last = NULL;
3424
3425 if (fbcon_has_exited)
3426 return count;
3427
3428 console_lock();
3429 idx = con2fb_map[fg_console];
3430
3431 if (idx == -1 || registered_fb[idx] == NULL)
3432 goto err;
3433
3434 info = registered_fb[idx];
3435
3436 if (!info->fbcon_par)
3437 goto err;
3438
3439 blink = simple_strtoul(buf, last, 0);
3440
3441 if (blink) {
3442 fbcon_cursor_noblink = 0;
3443 fbcon_add_cursor_timer(info);
3444 } else {
3445 fbcon_cursor_noblink = 1;
3446 fbcon_del_cursor_timer(info);
3447 }
3448
3449 err:
3450 console_unlock();
3451 return count;
3452 }
3453
3454 static struct device_attribute device_attrs[] = {
3455 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3456 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3457 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3458 store_cursor_blink),
3459 };
3460
3461 static int fbcon_init_device(void)
3462 {
3463 int i, error = 0;
3464
3465 fbcon_has_sysfs = 1;
3466
3467 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3468 error = device_create_file(fbcon_device, &device_attrs[i]);
3469
3470 if (error)
3471 break;
3472 }
3473
3474 if (error) {
3475 while (--i >= 0)
3476 device_remove_file(fbcon_device, &device_attrs[i]);
3477
3478 fbcon_has_sysfs = 0;
3479 }
3480
3481 return 0;
3482 }
3483
3484 static void fbcon_start(void)
3485 {
3486 if (num_registered_fb) {
3487 int i;
3488
3489 console_lock();
3490
3491 for (i = 0; i < FB_MAX; i++) {
3492 if (registered_fb[i] != NULL) {
3493 info_idx = i;
3494 break;
3495 }
3496 }
3497
3498 console_unlock();
3499 fbcon_takeover(0);
3500 }
3501 }
3502
3503 static void fbcon_exit(void)
3504 {
3505 struct fb_info *info;
3506 int i, j, mapped;
3507
3508 if (fbcon_has_exited)
3509 return;
3510
3511 kfree((void *)softback_buf);
3512 softback_buf = 0UL;
3513
3514 for (i = 0; i < FB_MAX; i++) {
3515 int pending = 0;
3516
3517 mapped = 0;
3518 info = registered_fb[i];
3519
3520 if (info == NULL)
3521 continue;
3522
3523 if (info->queue.func)
3524 pending = cancel_work_sync(&info->queue);
3525 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3526 "no"));
3527
3528 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3529 if (con2fb_map[j] == i)
3530 mapped = 1;
3531 }
3532
3533 if (mapped) {
3534 if (info->fbops->fb_release)
3535 info->fbops->fb_release(info, 0);
3536 module_put(info->fbops->owner);
3537
3538 if (info->fbcon_par) {
3539 struct fbcon_ops *ops = info->fbcon_par;
3540
3541 fbcon_del_cursor_timer(info);
3542 kfree(ops->cursor_src);
3543 kfree(info->fbcon_par);
3544 info->fbcon_par = NULL;
3545 }
3546
3547 if (info->queue.func == fb_flashcursor)
3548 info->queue.func = NULL;
3549 }
3550 }
3551
3552 fbcon_has_exited = 1;
3553 }
3554
3555 static int __init fb_console_init(void)
3556 {
3557 int i;
3558
3559 console_lock();
3560 fb_register_client(&fbcon_event_notifier);
3561 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3562 "fbcon");
3563
3564 if (IS_ERR(fbcon_device)) {
3565 printk(KERN_WARNING "Unable to create device "
3566 "for fbcon; errno = %ld\n",
3567 PTR_ERR(fbcon_device));
3568 fbcon_device = NULL;
3569 } else
3570 fbcon_init_device();
3571
3572 for (i = 0; i < MAX_NR_CONSOLES; i++)
3573 con2fb_map[i] = -1;
3574
3575 console_unlock();
3576 fbcon_start();
3577 return 0;
3578 }
3579
3580 module_init(fb_console_init);
3581
3582 #ifdef MODULE
3583
3584 static void __exit fbcon_deinit_device(void)
3585 {
3586 int i;
3587
3588 if (fbcon_has_sysfs) {
3589 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3590 device_remove_file(fbcon_device, &device_attrs[i]);
3591
3592 fbcon_has_sysfs = 0;
3593 }
3594 }
3595
3596 static void __exit fb_console_exit(void)
3597 {
3598 console_lock();
3599 fb_unregister_client(&fbcon_event_notifier);
3600 fbcon_deinit_device();
3601 device_destroy(fb_class, MKDEV(0, 0));
3602 fbcon_exit();
3603 console_unlock();
3604 unregister_con_driver(&fb_con);
3605 }
3606
3607 module_exit(fb_console_exit);
3608
3609 #endif
3610
3611 MODULE_LICENSE("GPL");
Linux ARM platform port for MOXA ART SoC