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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / video / console / fbcon.c
blob8745637e4b7e3811d27935b07dd1a24e6f3700c0
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80 #include <asm/system.h>
81
82 #include "fbcon.h"
83
84 #ifdef FBCONDEBUG
85 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
86 #else
87 # define DPRINTK(fmt, args...)
88 #endif
89
90 enum {
91 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
92 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
93 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
94 };
95
96 static struct display fb_display[MAX_NR_CONSOLES];
97
98 static signed char con2fb_map[MAX_NR_CONSOLES];
99 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
100
101 static int logo_lines;
102 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
103 enums. */
104 static int logo_shown = FBCON_LOGO_CANSHOW;
105 /* Software scrollback */
106 static int fbcon_softback_size = 32768;
107 static unsigned long softback_buf, softback_curr;
108 static unsigned long softback_in;
109 static unsigned long softback_top, softback_end;
110 static int softback_lines;
111 /* console mappings */
112 static int first_fb_vc;
113 static int last_fb_vc = MAX_NR_CONSOLES - 1;
114 static int fbcon_is_default = 1;
115 static int fbcon_has_exited;
116 static int primary_device = -1;
117 static int fbcon_has_console_bind;
118
119 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
120 static int map_override;
121
122 static inline void fbcon_map_override(void)
123 {
124 map_override = 1;
125 }
126 #else
127 static inline void fbcon_map_override(void)
128 {
129 }
130 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
131
132 /* font data */
133 static char fontname[40];
134
135 /* current fb_info */
136 static int info_idx = -1;
137
138 /* console rotation */
139 static int initial_rotation;
140 static int fbcon_has_sysfs;
141
142 static const struct consw fb_con;
143
144 #define CM_SOFTBACK (8)
145
146 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
147
148 static int fbcon_set_origin(struct vc_data *);
149
150 #define CURSOR_DRAW_DELAY (1)
151
152 static int vbl_cursor_cnt;
153 static int fbcon_cursor_noblink;
154
155 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
156
157 /*
158 * Interface used by the world
159 */
160
161 static const char *fbcon_startup(void);
162 static void fbcon_init(struct vc_data *vc, int init);
163 static void fbcon_deinit(struct vc_data *vc);
164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
165 int width);
166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
168 int count, int ypos, int xpos);
169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
170 static void fbcon_cursor(struct vc_data *vc, int mode);
171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
172 int count);
173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
174 int height, int width);
175 static int fbcon_switch(struct vc_data *vc);
176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
179
180 /*
181 * Internal routines
182 */
183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
185 static __inline__ void ypan_up(struct vc_data *vc, int count);
186 static __inline__ void ypan_down(struct vc_data *vc, int count);
187 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
188 int dy, int dx, int height, int width, u_int y_break);
189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 int unit);
191 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
192 int line, int count, int dy);
193 static void fbcon_modechanged(struct fb_info *info);
194 static void fbcon_set_all_vcs(struct fb_info *info);
195 static void fbcon_start(void);
196 static void fbcon_exit(void);
197 static struct device *fbcon_device;
198
199 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
200 static inline void fbcon_set_rotation(struct fb_info *info)
201 {
202 struct fbcon_ops *ops = info->fbcon_par;
203
204 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
205 ops->p->con_rotate < 4)
206 ops->rotate = ops->p->con_rotate;
207 else
208 ops->rotate = 0;
209 }
210
211 static void fbcon_rotate(struct fb_info *info, u32 rotate)
212 {
213 struct fbcon_ops *ops= info->fbcon_par;
214 struct fb_info *fb_info;
215
216 if (!ops || ops->currcon == -1)
217 return;
218
219 fb_info = registered_fb[con2fb_map[ops->currcon]];
220
221 if (info == fb_info) {
222 struct display *p = &fb_display[ops->currcon];
223
224 if (rotate < 4)
225 p->con_rotate = rotate;
226 else
227 p->con_rotate = 0;
228
229 fbcon_modechanged(info);
230 }
231 }
232
233 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
234 {
235 struct fbcon_ops *ops = info->fbcon_par;
236 struct vc_data *vc;
237 struct display *p;
238 int i;
239
240 if (!ops || ops->currcon < 0 || rotate > 3)
241 return;
242
243 for (i = first_fb_vc; i <= last_fb_vc; i++) {
244 vc = vc_cons[i].d;
245 if (!vc || vc->vc_mode != KD_TEXT ||
246 registered_fb[con2fb_map[i]] != info)
247 continue;
248
249 p = &fb_display[vc->vc_num];
250 p->con_rotate = rotate;
251 }
252
253 fbcon_set_all_vcs(info);
254 }
255 #else
256 static inline void fbcon_set_rotation(struct fb_info *info)
257 {
258 struct fbcon_ops *ops = info->fbcon_par;
259
260 ops->rotate = FB_ROTATE_UR;
261 }
262
263 static void fbcon_rotate(struct fb_info *info, u32 rotate)
264 {
265 return;
266 }
267
268 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
269 {
270 return;
271 }
272 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
273
274 static int fbcon_get_rotate(struct fb_info *info)
275 {
276 struct fbcon_ops *ops = info->fbcon_par;
277
278 return (ops) ? ops->rotate : 0;
279 }
280
281 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
282 {
283 struct fbcon_ops *ops = info->fbcon_par;
284
285 return (info->state != FBINFO_STATE_RUNNING ||
286 vc->vc_mode != KD_TEXT || ops->graphics) &&
287 !vt_force_oops_output(vc);
288 }
289
290 static int get_color(struct vc_data *vc, struct fb_info *info,
291 u16 c, int is_fg)
292 {
293 int depth = fb_get_color_depth(&info->var, &info->fix);
294 int color = 0;
295
296 if (console_blanked) {
297 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
298
299 c = vc->vc_video_erase_char & charmask;
300 }
301
302 if (depth != 1)
303 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
304 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
305
306 switch (depth) {
307 case 1:
308 {
309 int col = mono_col(info);
310 /* 0 or 1 */
311 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
312 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
313
314 if (console_blanked)
315 fg = bg;
316
317 color = (is_fg) ? fg : bg;
318 break;
319 }
320 case 2:
321 /*
322 * Scale down 16-colors to 4 colors. Default 4-color palette
323 * is grayscale. However, simply dividing the values by 4
324 * will not work, as colors 1, 2 and 3 will be scaled-down
325 * to zero rendering them invisible. So empirically convert
326 * colors to a sane 4-level grayscale.
327 */
328 switch (color) {
329 case 0:
330 color = 0; /* black */
331 break;
332 case 1 ... 6:
333 color = 2; /* white */
334 break;
335 case 7 ... 8:
336 color = 1; /* gray */
337 break;
338 default:
339 color = 3; /* intense white */
340 break;
341 }
342 break;
343 case 3:
344 /*
345 * Last 8 entries of default 16-color palette is a more intense
346 * version of the first 8 (i.e., same chrominance, different
347 * luminance).
348 */
349 color &= 7;
350 break;
351 }
352
353
354 return color;
355 }
356
357 static void fbcon_update_softback(struct vc_data *vc)
358 {
359 int l = fbcon_softback_size / vc->vc_size_row;
360
361 if (l > 5)
362 softback_end = softback_buf + l * vc->vc_size_row;
363 else
364 /* Smaller scrollback makes no sense, and 0 would screw
365 the operation totally */
366 softback_top = 0;
367 }
368
369 static void fb_flashcursor(struct work_struct *work)
370 {
371 struct fb_info *info = container_of(work, struct fb_info, queue);
372 struct fbcon_ops *ops = info->fbcon_par;
373 struct vc_data *vc = NULL;
374 int c;
375 int mode;
376
377 console_lock();
378 if (ops && ops->currcon != -1)
379 vc = vc_cons[ops->currcon].d;
380
381 if (!vc || !CON_IS_VISIBLE(vc) ||
382 registered_fb[con2fb_map[vc->vc_num]] != info ||
383 vc->vc_deccm != 1) {
384 console_unlock();
385 return;
386 }
387
388 c = scr_readw((u16 *) vc->vc_pos);
389 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
390 CM_ERASE : CM_DRAW;
391 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
392 get_color(vc, info, c, 0));
393 console_unlock();
394 }
395
396 static void cursor_timer_handler(unsigned long dev_addr)
397 {
398 struct fb_info *info = (struct fb_info *) dev_addr;
399 struct fbcon_ops *ops = info->fbcon_par;
400
401 schedule_work(&info->queue);
402 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
403 }
404
405 static void fbcon_add_cursor_timer(struct fb_info *info)
406 {
407 struct fbcon_ops *ops = info->fbcon_par;
408
409 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
410 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
411 !fbcon_cursor_noblink) {
412 if (!info->queue.func)
413 INIT_WORK(&info->queue, fb_flashcursor);
414
415 init_timer(&ops->cursor_timer);
416 ops->cursor_timer.function = cursor_timer_handler;
417 ops->cursor_timer.expires = jiffies + HZ / 5;
418 ops->cursor_timer.data = (unsigned long ) info;
419 add_timer(&ops->cursor_timer);
420 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
421 }
422 }
423
424 static void fbcon_del_cursor_timer(struct fb_info *info)
425 {
426 struct fbcon_ops *ops = info->fbcon_par;
427
428 if (info->queue.func == fb_flashcursor &&
429 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
430 del_timer_sync(&ops->cursor_timer);
431 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
432 }
433 }
434
435 #ifndef MODULE
436 static int __init fb_console_setup(char *this_opt)
437 {
438 char *options;
439 int i, j;
440
441 if (!this_opt || !*this_opt)
442 return 1;
443
444 while ((options = strsep(&this_opt, ",")) != NULL) {
445 if (!strncmp(options, "font:", 5))
446 strcpy(fontname, options + 5);
447
448 if (!strncmp(options, "scrollback:", 11)) {
449 options += 11;
450 if (*options) {
451 fbcon_softback_size = simple_strtoul(options, &options, 0);
452 if (*options == 'k' || *options == 'K') {
453 fbcon_softback_size *= 1024;
454 options++;
455 }
456 if (*options != ',')
457 return 1;
458 options++;
459 } else
460 return 1;
461 }
462
463 if (!strncmp(options, "map:", 4)) {
464 options += 4;
465 if (*options) {
466 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
467 if (!options[j])
468 j = 0;
469 con2fb_map_boot[i] =
470 (options[j++]-'0') % FB_MAX;
471 }
472
473 fbcon_map_override();
474 }
475
476 return 1;
477 }
478
479 if (!strncmp(options, "vc:", 3)) {
480 options += 3;
481 if (*options)
482 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 if (first_fb_vc < 0)
484 first_fb_vc = 0;
485 if (*options++ == '-')
486 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
487 fbcon_is_default = 0;
488 }
489
490 if (!strncmp(options, "rotate:", 7)) {
491 options += 7;
492 if (*options)
493 initial_rotation = simple_strtoul(options, &options, 0);
494 if (initial_rotation > 3)
495 initial_rotation = 0;
496 }
497 }
498 return 1;
499 }
500
501 __setup("fbcon=", fb_console_setup);
502 #endif
503
504 static int search_fb_in_map(int idx)
505 {
506 int i, retval = 0;
507
508 for (i = first_fb_vc; i <= last_fb_vc; i++) {
509 if (con2fb_map[i] == idx)
510 retval = 1;
511 }
512 return retval;
513 }
514
515 static int search_for_mapped_con(void)
516 {
517 int i, retval = 0;
518
519 for (i = first_fb_vc; i <= last_fb_vc; i++) {
520 if (con2fb_map[i] != -1)
521 retval = 1;
522 }
523 return retval;
524 }
525
526 static int fbcon_takeover(int show_logo)
527 {
528 int err, i;
529
530 if (!num_registered_fb)
531 return -ENODEV;
532
533 if (!show_logo)
534 logo_shown = FBCON_LOGO_DONTSHOW;
535
536 for (i = first_fb_vc; i <= last_fb_vc; i++)
537 con2fb_map[i] = info_idx;
538
539 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
540 fbcon_is_default);
541
542 if (err) {
543 for (i = first_fb_vc; i <= last_fb_vc; i++) {
544 con2fb_map[i] = -1;
545 }
546 info_idx = -1;
547 } else {
548 fbcon_has_console_bind = 1;
549 }
550
551 return err;
552 }
553
554 #ifdef MODULE
555 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
556 int cols, int rows, int new_cols, int new_rows)
557 {
558 logo_shown = FBCON_LOGO_DONTSHOW;
559 }
560 #else
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 /* Need to make room for the logo */
565 struct fbcon_ops *ops = info->fbcon_par;
566 int cnt, erase = vc->vc_video_erase_char, step;
567 unsigned short *save = NULL, *r, *q;
568 int logo_height;
569
570 if (info->flags & FBINFO_MODULE) {
571 logo_shown = FBCON_LOGO_DONTSHOW;
572 return;
573 }
574
575 /*
576 * remove underline attribute from erase character
577 * if black and white framebuffer.
578 */
579 if (fb_get_color_depth(&info->var, &info->fix) == 1)
580 erase &= ~0x400;
581 logo_height = fb_prepare_logo(info, ops->rotate);
582 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
583 q = (unsigned short *) (vc->vc_origin +
584 vc->vc_size_row * rows);
585 step = logo_lines * cols;
586 for (r = q - logo_lines * cols; r < q; r++)
587 if (scr_readw(r) != vc->vc_video_erase_char)
588 break;
589 if (r != q && new_rows >= rows + logo_lines) {
590 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
591 if (save) {
592 int i = cols < new_cols ? cols : new_cols;
593 scr_memsetw(save, erase, logo_lines * new_cols * 2);
594 r = q - step;
595 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
596 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
597 r = q;
598 }
599 }
600 if (r == q) {
601 /* We can scroll screen down */
602 r = q - step - cols;
603 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
604 scr_memcpyw(r + step, r, vc->vc_size_row);
605 r -= cols;
606 }
607 if (!save) {
608 int lines;
609 if (vc->vc_y + logo_lines >= rows)
610 lines = rows - vc->vc_y - 1;
611 else
612 lines = logo_lines;
613 vc->vc_y += lines;
614 vc->vc_pos += lines * vc->vc_size_row;
615 }
616 }
617 scr_memsetw((unsigned short *) vc->vc_origin,
618 erase,
619 vc->vc_size_row * logo_lines);
620
621 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
622 fbcon_clear_margins(vc, 0);
623 update_screen(vc);
624 }
625
626 if (save) {
627 q = (unsigned short *) (vc->vc_origin +
628 vc->vc_size_row *
629 rows);
630 scr_memcpyw(q, save, logo_lines * new_cols * 2);
631 vc->vc_y += logo_lines;
632 vc->vc_pos += logo_lines * vc->vc_size_row;
633 kfree(save);
634 }
635
636 if (logo_lines > vc->vc_bottom) {
637 logo_shown = FBCON_LOGO_CANSHOW;
638 printk(KERN_INFO
639 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
640 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
641 logo_shown = FBCON_LOGO_DRAW;
642 vc->vc_top = logo_lines;
643 }
644 }
645 #endif /* MODULE */
646
647 #ifdef CONFIG_FB_TILEBLITTING
648 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
649 {
650 struct fbcon_ops *ops = info->fbcon_par;
651
652 ops->p = &fb_display[vc->vc_num];
653
654 if ((info->flags & FBINFO_MISC_TILEBLITTING))
655 fbcon_set_tileops(vc, info);
656 else {
657 fbcon_set_rotation(info);
658 fbcon_set_bitops(ops);
659 }
660 }
661
662 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
663 {
664 int err = 0;
665
666 if (info->flags & FBINFO_MISC_TILEBLITTING &&
667 info->tileops->fb_get_tilemax(info) < charcount)
668 err = 1;
669
670 return err;
671 }
672 #else
673 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
674 {
675 struct fbcon_ops *ops = info->fbcon_par;
676
677 info->flags &= ~FBINFO_MISC_TILEBLITTING;
678 ops->p = &fb_display[vc->vc_num];
679 fbcon_set_rotation(info);
680 fbcon_set_bitops(ops);
681 }
682
683 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
684 {
685 return 0;
686 }
687
688 #endif /* CONFIG_MISC_TILEBLITTING */
689
690
691 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
692 int unit, int oldidx)
693 {
694 struct fbcon_ops *ops = NULL;
695 int err = 0;
696
697 if (!try_module_get(info->fbops->owner))
698 err = -ENODEV;
699
700 if (!err && info->fbops->fb_open &&
701 info->fbops->fb_open(info, 0))
702 err = -ENODEV;
703
704 if (!err) {
705 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
706 if (!ops)
707 err = -ENOMEM;
708 }
709
710 if (!err) {
711 info->fbcon_par = ops;
712
713 if (vc)
714 set_blitting_type(vc, info);
715 }
716
717 if (err) {
718 con2fb_map[unit] = oldidx;
719 module_put(info->fbops->owner);
720 }
721
722 return err;
723 }
724
725 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
726 struct fb_info *newinfo, int unit,
727 int oldidx, int found)
728 {
729 struct fbcon_ops *ops = oldinfo->fbcon_par;
730 int err = 0, ret;
731
732 if (oldinfo->fbops->fb_release &&
733 oldinfo->fbops->fb_release(oldinfo, 0)) {
734 con2fb_map[unit] = oldidx;
735 if (!found && newinfo->fbops->fb_release)
736 newinfo->fbops->fb_release(newinfo, 0);
737 if (!found)
738 module_put(newinfo->fbops->owner);
739 err = -ENODEV;
740 }
741
742 if (!err) {
743 fbcon_del_cursor_timer(oldinfo);
744 kfree(ops->cursor_state.mask);
745 kfree(ops->cursor_data);
746 kfree(ops->fontbuffer);
747 kfree(oldinfo->fbcon_par);
748 oldinfo->fbcon_par = NULL;
749 module_put(oldinfo->fbops->owner);
750 /*
751 If oldinfo and newinfo are driving the same hardware,
752 the fb_release() method of oldinfo may attempt to
753 restore the hardware state. This will leave the
754 newinfo in an undefined state. Thus, a call to
755 fb_set_par() may be needed for the newinfo.
756 */
757 if (newinfo->fbops->fb_set_par) {
758 ret = newinfo->fbops->fb_set_par(newinfo);
759
760 if (ret)
761 printk(KERN_ERR "con2fb_release_oldinfo: "
762 "detected unhandled fb_set_par error, "
763 "error code %d\n", ret);
764 }
765 }
766
767 return err;
768 }
769
770 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
771 int unit, int show_logo)
772 {
773 struct fbcon_ops *ops = info->fbcon_par;
774 int ret;
775
776 ops->currcon = fg_console;
777
778 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
779 ret = info->fbops->fb_set_par(info);
780
781 if (ret)
782 printk(KERN_ERR "con2fb_init_display: detected "
783 "unhandled fb_set_par error, "
784 "error code %d\n", ret);
785 }
786
787 ops->flags |= FBCON_FLAGS_INIT;
788 ops->graphics = 0;
789 fbcon_set_disp(info, &info->var, unit);
790
791 if (show_logo) {
792 struct vc_data *fg_vc = vc_cons[fg_console].d;
793 struct fb_info *fg_info =
794 registered_fb[con2fb_map[fg_console]];
795
796 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
797 fg_vc->vc_rows, fg_vc->vc_cols,
798 fg_vc->vc_rows);
799 }
800
801 update_screen(vc_cons[fg_console].d);
802 }
803
804 /**
805 * set_con2fb_map - map console to frame buffer device
806 * @unit: virtual console number to map
807 * @newidx: frame buffer index to map virtual console to
808 * @user: user request
809 *
810 * Maps a virtual console @unit to a frame buffer device
811 * @newidx.
812 */
813 static int set_con2fb_map(int unit, int newidx, int user)
814 {
815 struct vc_data *vc = vc_cons[unit].d;
816 int oldidx = con2fb_map[unit];
817 struct fb_info *info = registered_fb[newidx];
818 struct fb_info *oldinfo = NULL;
819 int found, err = 0;
820
821 if (oldidx == newidx)
822 return 0;
823
824 if (!info)
825 return -EINVAL;
826
827 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
828 info_idx = newidx;
829 return fbcon_takeover(0);
830 }
831
832 if (oldidx != -1)
833 oldinfo = registered_fb[oldidx];
834
835 found = search_fb_in_map(newidx);
836
837 console_lock();
838 con2fb_map[unit] = newidx;
839 if (!err && !found)
840 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
841
842
843 /*
844 * If old fb is not mapped to any of the consoles,
845 * fbcon should release it.
846 */
847 if (!err && oldinfo && !search_fb_in_map(oldidx))
848 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
849 found);
850
851 if (!err) {
852 int show_logo = (fg_console == 0 && !user &&
853 logo_shown != FBCON_LOGO_DONTSHOW);
854
855 if (!found)
856 fbcon_add_cursor_timer(info);
857 con2fb_map_boot[unit] = newidx;
858 con2fb_init_display(vc, info, unit, show_logo);
859 }
860
861 if (!search_fb_in_map(info_idx))
862 info_idx = newidx;
863
864 console_unlock();
865 return err;
866 }
867
868 /*
869 * Low Level Operations
870 */
871 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
872 static int var_to_display(struct display *disp,
873 struct fb_var_screeninfo *var,
874 struct fb_info *info)
875 {
876 disp->xres_virtual = var->xres_virtual;
877 disp->yres_virtual = var->yres_virtual;
878 disp->bits_per_pixel = var->bits_per_pixel;
879 disp->grayscale = var->grayscale;
880 disp->nonstd = var->nonstd;
881 disp->accel_flags = var->accel_flags;
882 disp->height = var->height;
883 disp->width = var->width;
884 disp->red = var->red;
885 disp->green = var->green;
886 disp->blue = var->blue;
887 disp->transp = var->transp;
888 disp->rotate = var->rotate;
889 disp->mode = fb_match_mode(var, &info->modelist);
890 if (disp->mode == NULL)
891 /* This should not happen */
892 return -EINVAL;
893 return 0;
894 }
895
896 static void display_to_var(struct fb_var_screeninfo *var,
897 struct display *disp)
898 {
899 fb_videomode_to_var(var, disp->mode);
900 var->xres_virtual = disp->xres_virtual;
901 var->yres_virtual = disp->yres_virtual;
902 var->bits_per_pixel = disp->bits_per_pixel;
903 var->grayscale = disp->grayscale;
904 var->nonstd = disp->nonstd;
905 var->accel_flags = disp->accel_flags;
906 var->height = disp->height;
907 var->width = disp->width;
908 var->red = disp->red;
909 var->green = disp->green;
910 var->blue = disp->blue;
911 var->transp = disp->transp;
912 var->rotate = disp->rotate;
913 }
914
915 static const char *fbcon_startup(void)
916 {
917 const char *display_desc = "frame buffer device";
918 struct display *p = &fb_display[fg_console];
919 struct vc_data *vc = vc_cons[fg_console].d;
920 const struct font_desc *font = NULL;
921 struct module *owner;
922 struct fb_info *info = NULL;
923 struct fbcon_ops *ops;
924 int rows, cols;
925
926 /*
927 * If num_registered_fb is zero, this is a call for the dummy part.
928 * The frame buffer devices weren't initialized yet.
929 */
930 if (!num_registered_fb || info_idx == -1)
931 return display_desc;
932 /*
933 * Instead of blindly using registered_fb[0], we use info_idx, set by
934 * fb_console_init();
935 */
936 info = registered_fb[info_idx];
937 if (!info)
938 return NULL;
939
940 owner = info->fbops->owner;
941 if (!try_module_get(owner))
942 return NULL;
943 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
944 module_put(owner);
945 return NULL;
946 }
947
948 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
949 if (!ops) {
950 module_put(owner);
951 return NULL;
952 }
953
954 ops->currcon = -1;
955 ops->graphics = 1;
956 ops->cur_rotate = -1;
957 info->fbcon_par = ops;
958 p->con_rotate = initial_rotation;
959 set_blitting_type(vc, info);
960
961 if (info->fix.type != FB_TYPE_TEXT) {
962 if (fbcon_softback_size) {
963 if (!softback_buf) {
964 softback_buf =
965 (unsigned long)
966 kmalloc(fbcon_softback_size,
967 GFP_KERNEL);
968 if (!softback_buf) {
969 fbcon_softback_size = 0;
970 softback_top = 0;
971 }
972 }
973 } else {
974 if (softback_buf) {
975 kfree((void *) softback_buf);
976 softback_buf = 0;
977 softback_top = 0;
978 }
979 }
980 if (softback_buf)
981 softback_in = softback_top = softback_curr =
982 softback_buf;
983 softback_lines = 0;
984 }
985
986 /* Setup default font */
987 if (!p->fontdata) {
988 if (!fontname[0] || !(font = find_font(fontname)))
989 font = get_default_font(info->var.xres,
990 info->var.yres,
991 info->pixmap.blit_x,
992 info->pixmap.blit_y);
993 vc->vc_font.width = font->width;
994 vc->vc_font.height = font->height;
995 vc->vc_font.data = (void *)(p->fontdata = font->data);
996 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
997 }
998
999 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1000 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1001 cols /= vc->vc_font.width;
1002 rows /= vc->vc_font.height;
1003 vc_resize(vc, cols, rows);
1004
1005 DPRINTK("mode: %s\n", info->fix.id);
1006 DPRINTK("visual: %d\n", info->fix.visual);
1007 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1008 info->var.yres,
1009 info->var.bits_per_pixel);
1010
1011 fbcon_add_cursor_timer(info);
1012 fbcon_has_exited = 0;
1013 return display_desc;
1014 }
1015
1016 static void fbcon_init(struct vc_data *vc, int init)
1017 {
1018 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1019 struct fbcon_ops *ops;
1020 struct vc_data **default_mode = vc->vc_display_fg;
1021 struct vc_data *svc = *default_mode;
1022 struct display *t, *p = &fb_display[vc->vc_num];
1023 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1024 int cap, ret;
1025
1026 if (info_idx == -1 || info == NULL)
1027 return;
1028
1029 cap = info->flags;
1030
1031 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1032 (info->fix.type == FB_TYPE_TEXT))
1033 logo = 0;
1034
1035 if (var_to_display(p, &info->var, info))
1036 return;
1037
1038 if (!info->fbcon_par)
1039 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1040
1041 /* If we are not the first console on this
1042 fb, copy the font from that console */
1043 t = &fb_display[fg_console];
1044 if (!p->fontdata) {
1045 if (t->fontdata) {
1046 struct vc_data *fvc = vc_cons[fg_console].d;
1047
1048 vc->vc_font.data = (void *)(p->fontdata =
1049 fvc->vc_font.data);
1050 vc->vc_font.width = fvc->vc_font.width;
1051 vc->vc_font.height = fvc->vc_font.height;
1052 p->userfont = t->userfont;
1053
1054 if (p->userfont)
1055 REFCOUNT(p->fontdata)++;
1056 } else {
1057 const struct font_desc *font = NULL;
1058
1059 if (!fontname[0] || !(font = find_font(fontname)))
1060 font = get_default_font(info->var.xres,
1061 info->var.yres,
1062 info->pixmap.blit_x,
1063 info->pixmap.blit_y);
1064 vc->vc_font.width = font->width;
1065 vc->vc_font.height = font->height;
1066 vc->vc_font.data = (void *)(p->fontdata = font->data);
1067 vc->vc_font.charcount = 256; /* FIXME Need to
1068 support more fonts */
1069 }
1070 }
1071
1072 if (p->userfont)
1073 charcnt = FNTCHARCNT(p->fontdata);
1074
1075 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1076 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1077 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1078 if (charcnt == 256) {
1079 vc->vc_hi_font_mask = 0;
1080 } else {
1081 vc->vc_hi_font_mask = 0x100;
1082 if (vc->vc_can_do_color)
1083 vc->vc_complement_mask <<= 1;
1084 }
1085
1086 if (!*svc->vc_uni_pagedir_loc)
1087 con_set_default_unimap(svc);
1088 if (!*vc->vc_uni_pagedir_loc)
1089 con_copy_unimap(vc, svc);
1090
1091 ops = info->fbcon_par;
1092 p->con_rotate = initial_rotation;
1093 set_blitting_type(vc, info);
1094
1095 cols = vc->vc_cols;
1096 rows = vc->vc_rows;
1097 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1098 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1099 new_cols /= vc->vc_font.width;
1100 new_rows /= vc->vc_font.height;
1101
1102 /*
1103 * We must always set the mode. The mode of the previous console
1104 * driver could be in the same resolution but we are using different
1105 * hardware so we have to initialize the hardware.
1106 *
1107 * We need to do it in fbcon_init() to prevent screen corruption.
1108 */
1109 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1110 if (info->fbops->fb_set_par &&
1111 !(ops->flags & FBCON_FLAGS_INIT)) {
1112 ret = info->fbops->fb_set_par(info);
1113
1114 if (ret)
1115 printk(KERN_ERR "fbcon_init: detected "
1116 "unhandled fb_set_par error, "
1117 "error code %d\n", ret);
1118 }
1119
1120 ops->flags |= FBCON_FLAGS_INIT;
1121 }
1122
1123 ops->graphics = 0;
1124
1125 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1126 !(cap & FBINFO_HWACCEL_DISABLED))
1127 p->scrollmode = SCROLL_MOVE;
1128 else /* default to something safe */
1129 p->scrollmode = SCROLL_REDRAW;
1130
1131 /*
1132 * ++guenther: console.c:vc_allocate() relies on initializing
1133 * vc_{cols,rows}, but we must not set those if we are only
1134 * resizing the console.
1135 */
1136 if (init) {
1137 vc->vc_cols = new_cols;
1138 vc->vc_rows = new_rows;
1139 } else
1140 vc_resize(vc, new_cols, new_rows);
1141
1142 if (logo)
1143 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1144
1145 if (vc == svc && softback_buf)
1146 fbcon_update_softback(vc);
1147
1148 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1149 ops->rotate = FB_ROTATE_UR;
1150 set_blitting_type(vc, info);
1151 }
1152
1153 ops->p = &fb_display[fg_console];
1154 }
1155
1156 static void fbcon_free_font(struct display *p)
1157 {
1158 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1159 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1160 p->fontdata = NULL;
1161 p->userfont = 0;
1162 }
1163
1164 static void fbcon_deinit(struct vc_data *vc)
1165 {
1166 struct display *p = &fb_display[vc->vc_num];
1167 struct fb_info *info;
1168 struct fbcon_ops *ops;
1169 int idx;
1170
1171 fbcon_free_font(p);
1172 idx = con2fb_map[vc->vc_num];
1173
1174 if (idx == -1)
1175 goto finished;
1176
1177 info = registered_fb[idx];
1178
1179 if (!info)
1180 goto finished;
1181
1182 ops = info->fbcon_par;
1183
1184 if (!ops)
1185 goto finished;
1186
1187 if (CON_IS_VISIBLE(vc))
1188 fbcon_del_cursor_timer(info);
1189
1190 ops->flags &= ~FBCON_FLAGS_INIT;
1191 finished:
1192
1193 if (!con_is_bound(&fb_con))
1194 fbcon_exit();
1195
1196 return;
1197 }
1198
1199 /* ====================================================================== */
1200
1201 /* fbcon_XXX routines - interface used by the world
1202 *
1203 * This system is now divided into two levels because of complications
1204 * caused by hardware scrolling. Top level functions:
1205 *
1206 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1207 *
1208 * handles y values in range [0, scr_height-1] that correspond to real
1209 * screen positions. y_wrap shift means that first line of bitmap may be
1210 * anywhere on this display. These functions convert lineoffsets to
1211 * bitmap offsets and deal with the wrap-around case by splitting blits.
1212 *
1213 * fbcon_bmove_physical_8() -- These functions fast implementations
1214 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1215 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1216 *
1217 * WARNING:
1218 *
1219 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1220 * Implies should only really hardware scroll in rows. Only reason for
1221 * restriction is simplicity & efficiency at the moment.
1222 */
1223
1224 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1225 int width)
1226 {
1227 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1228 struct fbcon_ops *ops = info->fbcon_par;
1229
1230 struct display *p = &fb_display[vc->vc_num];
1231 u_int y_break;
1232
1233 if (fbcon_is_inactive(vc, info))
1234 return;
1235
1236 if (!height || !width)
1237 return;
1238
1239 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1240 vc->vc_top = 0;
1241
1242 /* Split blits that cross physical y_wrap boundary */
1243
1244 y_break = p->vrows - p->yscroll;
1245 if (sy < y_break && sy + height - 1 >= y_break) {
1246 u_int b = y_break - sy;
1247 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1248 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1249 width);
1250 } else
1251 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1252 }
1253
1254 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1255 int count, int ypos, int xpos)
1256 {
1257 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1258 struct display *p = &fb_display[vc->vc_num];
1259 struct fbcon_ops *ops = info->fbcon_par;
1260
1261 if (!fbcon_is_inactive(vc, info))
1262 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1263 get_color(vc, info, scr_readw(s), 1),
1264 get_color(vc, info, scr_readw(s), 0));
1265 }
1266
1267 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1268 {
1269 unsigned short chr;
1270
1271 scr_writew(c, &chr);
1272 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1273 }
1274
1275 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1276 {
1277 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1278 struct fbcon_ops *ops = info->fbcon_par;
1279
1280 if (!fbcon_is_inactive(vc, info))
1281 ops->clear_margins(vc, info, bottom_only);
1282 }
1283
1284 static void fbcon_cursor(struct vc_data *vc, int mode)
1285 {
1286 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1287 struct fbcon_ops *ops = info->fbcon_par;
1288 int y;
1289 int c = scr_readw((u16 *) vc->vc_pos);
1290
1291 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1292 return;
1293
1294 if (vc->vc_cursor_type & 0x10)
1295 fbcon_del_cursor_timer(info);
1296 else
1297 fbcon_add_cursor_timer(info);
1298
1299 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1300 if (mode & CM_SOFTBACK) {
1301 mode &= ~CM_SOFTBACK;
1302 y = softback_lines;
1303 } else {
1304 if (softback_lines)
1305 fbcon_set_origin(vc);
1306 y = 0;
1307 }
1308
1309 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1310 get_color(vc, info, c, 0));
1311 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1312 }
1313
1314 static int scrollback_phys_max = 0;
1315 static int scrollback_max = 0;
1316 static int scrollback_current = 0;
1317
1318 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1319 int unit)
1320 {
1321 struct display *p, *t;
1322 struct vc_data **default_mode, *vc;
1323 struct vc_data *svc;
1324 struct fbcon_ops *ops = info->fbcon_par;
1325 int rows, cols, charcnt = 256;
1326
1327 p = &fb_display[unit];
1328
1329 if (var_to_display(p, var, info))
1330 return;
1331
1332 vc = vc_cons[unit].d;
1333
1334 if (!vc)
1335 return;
1336
1337 default_mode = vc->vc_display_fg;
1338 svc = *default_mode;
1339 t = &fb_display[svc->vc_num];
1340
1341 if (!vc->vc_font.data) {
1342 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1343 vc->vc_font.width = (*default_mode)->vc_font.width;
1344 vc->vc_font.height = (*default_mode)->vc_font.height;
1345 p->userfont = t->userfont;
1346 if (p->userfont)
1347 REFCOUNT(p->fontdata)++;
1348 }
1349 if (p->userfont)
1350 charcnt = FNTCHARCNT(p->fontdata);
1351
1352 var->activate = FB_ACTIVATE_NOW;
1353 info->var.activate = var->activate;
1354 var->yoffset = info->var.yoffset;
1355 var->xoffset = info->var.xoffset;
1356 fb_set_var(info, var);
1357 ops->var = info->var;
1358 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1359 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1360 if (charcnt == 256) {
1361 vc->vc_hi_font_mask = 0;
1362 } else {
1363 vc->vc_hi_font_mask = 0x100;
1364 if (vc->vc_can_do_color)
1365 vc->vc_complement_mask <<= 1;
1366 }
1367
1368 if (!*svc->vc_uni_pagedir_loc)
1369 con_set_default_unimap(svc);
1370 if (!*vc->vc_uni_pagedir_loc)
1371 con_copy_unimap(vc, svc);
1372
1373 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1374 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1375 cols /= vc->vc_font.width;
1376 rows /= vc->vc_font.height;
1377 vc_resize(vc, cols, rows);
1378
1379 if (CON_IS_VISIBLE(vc)) {
1380 update_screen(vc);
1381 if (softback_buf)
1382 fbcon_update_softback(vc);
1383 }
1384 }
1385
1386 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1387 {
1388 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1389 struct fbcon_ops *ops = info->fbcon_par;
1390 struct display *p = &fb_display[vc->vc_num];
1391
1392 p->yscroll += count;
1393 if (p->yscroll >= p->vrows) /* Deal with wrap */
1394 p->yscroll -= p->vrows;
1395 ops->var.xoffset = 0;
1396 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1397 ops->var.vmode |= FB_VMODE_YWRAP;
1398 ops->update_start(info);
1399 scrollback_max += count;
1400 if (scrollback_max > scrollback_phys_max)
1401 scrollback_max = scrollback_phys_max;
1402 scrollback_current = 0;
1403 }
1404
1405 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1406 {
1407 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1408 struct fbcon_ops *ops = info->fbcon_par;
1409 struct display *p = &fb_display[vc->vc_num];
1410
1411 p->yscroll -= count;
1412 if (p->yscroll < 0) /* Deal with wrap */
1413 p->yscroll += p->vrows;
1414 ops->var.xoffset = 0;
1415 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416 ops->var.vmode |= FB_VMODE_YWRAP;
1417 ops->update_start(info);
1418 scrollback_max -= count;
1419 if (scrollback_max < 0)
1420 scrollback_max = 0;
1421 scrollback_current = 0;
1422 }
1423
1424 static __inline__ void ypan_up(struct vc_data *vc, int count)
1425 {
1426 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1427 struct display *p = &fb_display[vc->vc_num];
1428 struct fbcon_ops *ops = info->fbcon_par;
1429
1430 p->yscroll += count;
1431 if (p->yscroll > p->vrows - vc->vc_rows) {
1432 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1433 0, 0, 0, vc->vc_rows, vc->vc_cols);
1434 p->yscroll -= p->vrows - vc->vc_rows;
1435 }
1436
1437 ops->var.xoffset = 0;
1438 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1439 ops->var.vmode &= ~FB_VMODE_YWRAP;
1440 ops->update_start(info);
1441 fbcon_clear_margins(vc, 1);
1442 scrollback_max += count;
1443 if (scrollback_max > scrollback_phys_max)
1444 scrollback_max = scrollback_phys_max;
1445 scrollback_current = 0;
1446 }
1447
1448 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1449 {
1450 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1451 struct fbcon_ops *ops = info->fbcon_par;
1452 struct display *p = &fb_display[vc->vc_num];
1453
1454 p->yscroll += count;
1455
1456 if (p->yscroll > p->vrows - vc->vc_rows) {
1457 p->yscroll -= p->vrows - vc->vc_rows;
1458 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1459 }
1460
1461 ops->var.xoffset = 0;
1462 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1463 ops->var.vmode &= ~FB_VMODE_YWRAP;
1464 ops->update_start(info);
1465 fbcon_clear_margins(vc, 1);
1466 scrollback_max += count;
1467 if (scrollback_max > scrollback_phys_max)
1468 scrollback_max = scrollback_phys_max;
1469 scrollback_current = 0;
1470 }
1471
1472 static __inline__ void ypan_down(struct vc_data *vc, int count)
1473 {
1474 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1475 struct display *p = &fb_display[vc->vc_num];
1476 struct fbcon_ops *ops = info->fbcon_par;
1477
1478 p->yscroll -= count;
1479 if (p->yscroll < 0) {
1480 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1481 0, vc->vc_rows, vc->vc_cols);
1482 p->yscroll += p->vrows - vc->vc_rows;
1483 }
1484
1485 ops->var.xoffset = 0;
1486 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1487 ops->var.vmode &= ~FB_VMODE_YWRAP;
1488 ops->update_start(info);
1489 fbcon_clear_margins(vc, 1);
1490 scrollback_max -= count;
1491 if (scrollback_max < 0)
1492 scrollback_max = 0;
1493 scrollback_current = 0;
1494 }
1495
1496 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1497 {
1498 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1499 struct fbcon_ops *ops = info->fbcon_par;
1500 struct display *p = &fb_display[vc->vc_num];
1501
1502 p->yscroll -= count;
1503
1504 if (p->yscroll < 0) {
1505 p->yscroll += p->vrows - vc->vc_rows;
1506 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1507 }
1508
1509 ops->var.xoffset = 0;
1510 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1511 ops->var.vmode &= ~FB_VMODE_YWRAP;
1512 ops->update_start(info);
1513 fbcon_clear_margins(vc, 1);
1514 scrollback_max -= count;
1515 if (scrollback_max < 0)
1516 scrollback_max = 0;
1517 scrollback_current = 0;
1518 }
1519
1520 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1521 long delta)
1522 {
1523 int count = vc->vc_rows;
1524 unsigned short *d, *s;
1525 unsigned long n;
1526 int line = 0;
1527
1528 d = (u16 *) softback_curr;
1529 if (d == (u16 *) softback_in)
1530 d = (u16 *) vc->vc_origin;
1531 n = softback_curr + delta * vc->vc_size_row;
1532 softback_lines -= delta;
1533 if (delta < 0) {
1534 if (softback_curr < softback_top && n < softback_buf) {
1535 n += softback_end - softback_buf;
1536 if (n < softback_top) {
1537 softback_lines -=
1538 (softback_top - n) / vc->vc_size_row;
1539 n = softback_top;
1540 }
1541 } else if (softback_curr >= softback_top
1542 && n < softback_top) {
1543 softback_lines -=
1544 (softback_top - n) / vc->vc_size_row;
1545 n = softback_top;
1546 }
1547 } else {
1548 if (softback_curr > softback_in && n >= softback_end) {
1549 n += softback_buf - softback_end;
1550 if (n > softback_in) {
1551 n = softback_in;
1552 softback_lines = 0;
1553 }
1554 } else if (softback_curr <= softback_in && n > softback_in) {
1555 n = softback_in;
1556 softback_lines = 0;
1557 }
1558 }
1559 if (n == softback_curr)
1560 return;
1561 softback_curr = n;
1562 s = (u16 *) softback_curr;
1563 if (s == (u16 *) softback_in)
1564 s = (u16 *) vc->vc_origin;
1565 while (count--) {
1566 unsigned short *start;
1567 unsigned short *le;
1568 unsigned short c;
1569 int x = 0;
1570 unsigned short attr = 1;
1571
1572 start = s;
1573 le = advance_row(s, 1);
1574 do {
1575 c = scr_readw(s);
1576 if (attr != (c & 0xff00)) {
1577 attr = c & 0xff00;
1578 if (s > start) {
1579 fbcon_putcs(vc, start, s - start,
1580 line, x);
1581 x += s - start;
1582 start = s;
1583 }
1584 }
1585 if (c == scr_readw(d)) {
1586 if (s > start) {
1587 fbcon_putcs(vc, start, s - start,
1588 line, x);
1589 x += s - start + 1;
1590 start = s + 1;
1591 } else {
1592 x++;
1593 start++;
1594 }
1595 }
1596 s++;
1597 d++;
1598 } while (s < le);
1599 if (s > start)
1600 fbcon_putcs(vc, start, s - start, line, x);
1601 line++;
1602 if (d == (u16 *) softback_end)
1603 d = (u16 *) softback_buf;
1604 if (d == (u16 *) softback_in)
1605 d = (u16 *) vc->vc_origin;
1606 if (s == (u16 *) softback_end)
1607 s = (u16 *) softback_buf;
1608 if (s == (u16 *) softback_in)
1609 s = (u16 *) vc->vc_origin;
1610 }
1611 }
1612
1613 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1614 int line, int count, int dy)
1615 {
1616 unsigned short *s = (unsigned short *)
1617 (vc->vc_origin + vc->vc_size_row * line);
1618
1619 while (count--) {
1620 unsigned short *start = s;
1621 unsigned short *le = advance_row(s, 1);
1622 unsigned short c;
1623 int x = 0;
1624 unsigned short attr = 1;
1625
1626 do {
1627 c = scr_readw(s);
1628 if (attr != (c & 0xff00)) {
1629 attr = c & 0xff00;
1630 if (s > start) {
1631 fbcon_putcs(vc, start, s - start,
1632 dy, x);
1633 x += s - start;
1634 start = s;
1635 }
1636 }
1637 console_conditional_schedule();
1638 s++;
1639 } while (s < le);
1640 if (s > start)
1641 fbcon_putcs(vc, start, s - start, dy, x);
1642 console_conditional_schedule();
1643 dy++;
1644 }
1645 }
1646
1647 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1648 struct display *p, int line, int count, int ycount)
1649 {
1650 int offset = ycount * vc->vc_cols;
1651 unsigned short *d = (unsigned short *)
1652 (vc->vc_origin + vc->vc_size_row * line);
1653 unsigned short *s = d + offset;
1654 struct fbcon_ops *ops = info->fbcon_par;
1655
1656 while (count--) {
1657 unsigned short *start = s;
1658 unsigned short *le = advance_row(s, 1);
1659 unsigned short c;
1660 int x = 0;
1661
1662 do {
1663 c = scr_readw(s);
1664
1665 if (c == scr_readw(d)) {
1666 if (s > start) {
1667 ops->bmove(vc, info, line + ycount, x,
1668 line, x, 1, s-start);
1669 x += s - start + 1;
1670 start = s + 1;
1671 } else {
1672 x++;
1673 start++;
1674 }
1675 }
1676
1677 scr_writew(c, d);
1678 console_conditional_schedule();
1679 s++;
1680 d++;
1681 } while (s < le);
1682 if (s > start)
1683 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1684 s-start);
1685 console_conditional_schedule();
1686 if (ycount > 0)
1687 line++;
1688 else {
1689 line--;
1690 /* NOTE: We subtract two lines from these pointers */
1691 s -= vc->vc_size_row;
1692 d -= vc->vc_size_row;
1693 }
1694 }
1695 }
1696
1697 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1698 int line, int count, int offset)
1699 {
1700 unsigned short *d = (unsigned short *)
1701 (vc->vc_origin + vc->vc_size_row * line);
1702 unsigned short *s = d + offset;
1703
1704 while (count--) {
1705 unsigned short *start = s;
1706 unsigned short *le = advance_row(s, 1);
1707 unsigned short c;
1708 int x = 0;
1709 unsigned short attr = 1;
1710
1711 do {
1712 c = scr_readw(s);
1713 if (attr != (c & 0xff00)) {
1714 attr = c & 0xff00;
1715 if (s > start) {
1716 fbcon_putcs(vc, start, s - start,
1717 line, x);
1718 x += s - start;
1719 start = s;
1720 }
1721 }
1722 if (c == scr_readw(d)) {
1723 if (s > start) {
1724 fbcon_putcs(vc, start, s - start,
1725 line, x);
1726 x += s - start + 1;
1727 start = s + 1;
1728 } else {
1729 x++;
1730 start++;
1731 }
1732 }
1733 scr_writew(c, d);
1734 console_conditional_schedule();
1735 s++;
1736 d++;
1737 } while (s < le);
1738 if (s > start)
1739 fbcon_putcs(vc, start, s - start, line, x);
1740 console_conditional_schedule();
1741 if (offset > 0)
1742 line++;
1743 else {
1744 line--;
1745 /* NOTE: We subtract two lines from these pointers */
1746 s -= vc->vc_size_row;
1747 d -= vc->vc_size_row;
1748 }
1749 }
1750 }
1751
1752 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1753 int count)
1754 {
1755 unsigned short *p;
1756
1757 if (vc->vc_num != fg_console)
1758 return;
1759 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1760
1761 while (count) {
1762 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1763 count--;
1764 p = advance_row(p, 1);
1765 softback_in += vc->vc_size_row;
1766 if (softback_in == softback_end)
1767 softback_in = softback_buf;
1768 if (softback_in == softback_top) {
1769 softback_top += vc->vc_size_row;
1770 if (softback_top == softback_end)
1771 softback_top = softback_buf;
1772 }
1773 }
1774 softback_curr = softback_in;
1775 }
1776
1777 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1778 int count)
1779 {
1780 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1781 struct display *p = &fb_display[vc->vc_num];
1782 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1783
1784 if (fbcon_is_inactive(vc, info))
1785 return -EINVAL;
1786
1787 fbcon_cursor(vc, CM_ERASE);
1788
1789 /*
1790 * ++Geert: Only use ywrap/ypan if the console is in text mode
1791 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1792 * whole screen (prevents flicker).
1793 */
1794
1795 switch (dir) {
1796 case SM_UP:
1797 if (count > vc->vc_rows) /* Maximum realistic size */
1798 count = vc->vc_rows;
1799 if (softback_top)
1800 fbcon_softback_note(vc, t, count);
1801 if (logo_shown >= 0)
1802 goto redraw_up;
1803 switch (p->scrollmode) {
1804 case SCROLL_MOVE:
1805 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1806 count);
1807 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1808 scr_memsetw((unsigned short *) (vc->vc_origin +
1809 vc->vc_size_row *
1810 (b - count)),
1811 vc->vc_video_erase_char,
1812 vc->vc_size_row * count);
1813 return 1;
1814 break;
1815
1816 case SCROLL_WRAP_MOVE:
1817 if (b - t - count > 3 * vc->vc_rows >> 2) {
1818 if (t > 0)
1819 fbcon_bmove(vc, 0, 0, count, 0, t,
1820 vc->vc_cols);
1821 ywrap_up(vc, count);
1822 if (vc->vc_rows - b > 0)
1823 fbcon_bmove(vc, b - count, 0, b, 0,
1824 vc->vc_rows - b,
1825 vc->vc_cols);
1826 } else if (info->flags & FBINFO_READS_FAST)
1827 fbcon_bmove(vc, t + count, 0, t, 0,
1828 b - t - count, vc->vc_cols);
1829 else
1830 goto redraw_up;
1831 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1832 break;
1833
1834 case SCROLL_PAN_REDRAW:
1835 if ((p->yscroll + count <=
1836 2 * (p->vrows - vc->vc_rows))
1837 && ((!scroll_partial && (b - t == vc->vc_rows))
1838 || (scroll_partial
1839 && (b - t - count >
1840 3 * vc->vc_rows >> 2)))) {
1841 if (t > 0)
1842 fbcon_redraw_move(vc, p, 0, t, count);
1843 ypan_up_redraw(vc, t, count);
1844 if (vc->vc_rows - b > 0)
1845 fbcon_redraw_move(vc, p, b,
1846 vc->vc_rows - b, b);
1847 } else
1848 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1849 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1850 break;
1851
1852 case SCROLL_PAN_MOVE:
1853 if ((p->yscroll + count <=
1854 2 * (p->vrows - vc->vc_rows))
1855 && ((!scroll_partial && (b - t == vc->vc_rows))
1856 || (scroll_partial
1857 && (b - t - count >
1858 3 * vc->vc_rows >> 2)))) {
1859 if (t > 0)
1860 fbcon_bmove(vc, 0, 0, count, 0, t,
1861 vc->vc_cols);
1862 ypan_up(vc, count);
1863 if (vc->vc_rows - b > 0)
1864 fbcon_bmove(vc, b - count, 0, b, 0,
1865 vc->vc_rows - b,
1866 vc->vc_cols);
1867 } else if (info->flags & FBINFO_READS_FAST)
1868 fbcon_bmove(vc, t + count, 0, t, 0,
1869 b - t - count, vc->vc_cols);
1870 else
1871 goto redraw_up;
1872 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1873 break;
1874
1875 case SCROLL_REDRAW:
1876 redraw_up:
1877 fbcon_redraw(vc, p, t, b - t - count,
1878 count * vc->vc_cols);
1879 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1880 scr_memsetw((unsigned short *) (vc->vc_origin +
1881 vc->vc_size_row *
1882 (b - count)),
1883 vc->vc_video_erase_char,
1884 vc->vc_size_row * count);
1885 return 1;
1886 }
1887 break;
1888
1889 case SM_DOWN:
1890 if (count > vc->vc_rows) /* Maximum realistic size */
1891 count = vc->vc_rows;
1892 if (logo_shown >= 0)
1893 goto redraw_down;
1894 switch (p->scrollmode) {
1895 case SCROLL_MOVE:
1896 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1897 -count);
1898 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1899 scr_memsetw((unsigned short *) (vc->vc_origin +
1900 vc->vc_size_row *
1901 t),
1902 vc->vc_video_erase_char,
1903 vc->vc_size_row * count);
1904 return 1;
1905 break;
1906
1907 case SCROLL_WRAP_MOVE:
1908 if (b - t - count > 3 * vc->vc_rows >> 2) {
1909 if (vc->vc_rows - b > 0)
1910 fbcon_bmove(vc, b, 0, b - count, 0,
1911 vc->vc_rows - b,
1912 vc->vc_cols);
1913 ywrap_down(vc, count);
1914 if (t > 0)
1915 fbcon_bmove(vc, count, 0, 0, 0, t,
1916 vc->vc_cols);
1917 } else if (info->flags & FBINFO_READS_FAST)
1918 fbcon_bmove(vc, t, 0, t + count, 0,
1919 b - t - count, vc->vc_cols);
1920 else
1921 goto redraw_down;
1922 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1923 break;
1924
1925 case SCROLL_PAN_MOVE:
1926 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1927 && ((!scroll_partial && (b - t == vc->vc_rows))
1928 || (scroll_partial
1929 && (b - t - count >
1930 3 * vc->vc_rows >> 2)))) {
1931 if (vc->vc_rows - b > 0)
1932 fbcon_bmove(vc, b, 0, b - count, 0,
1933 vc->vc_rows - b,
1934 vc->vc_cols);
1935 ypan_down(vc, count);
1936 if (t > 0)
1937 fbcon_bmove(vc, count, 0, 0, 0, t,
1938 vc->vc_cols);
1939 } else if (info->flags & FBINFO_READS_FAST)
1940 fbcon_bmove(vc, t, 0, t + count, 0,
1941 b - t - count, vc->vc_cols);
1942 else
1943 goto redraw_down;
1944 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945 break;
1946
1947 case SCROLL_PAN_REDRAW:
1948 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1949 && ((!scroll_partial && (b - t == vc->vc_rows))
1950 || (scroll_partial
1951 && (b - t - count >
1952 3 * vc->vc_rows >> 2)))) {
1953 if (vc->vc_rows - b > 0)
1954 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1955 b - count);
1956 ypan_down_redraw(vc, t, count);
1957 if (t > 0)
1958 fbcon_redraw_move(vc, p, count, t, 0);
1959 } else
1960 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1961 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1962 break;
1963
1964 case SCROLL_REDRAW:
1965 redraw_down:
1966 fbcon_redraw(vc, p, b - 1, b - t - count,
1967 -count * vc->vc_cols);
1968 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1969 scr_memsetw((unsigned short *) (vc->vc_origin +
1970 vc->vc_size_row *
1971 t),
1972 vc->vc_video_erase_char,
1973 vc->vc_size_row * count);
1974 return 1;
1975 }
1976 }
1977 return 0;
1978 }
1979
1980
1981 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1982 int height, int width)
1983 {
1984 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1985 struct display *p = &fb_display[vc->vc_num];
1986
1987 if (fbcon_is_inactive(vc, info))
1988 return;
1989
1990 if (!width || !height)
1991 return;
1992
1993 /* Split blits that cross physical y_wrap case.
1994 * Pathological case involves 4 blits, better to use recursive
1995 * code rather than unrolled case
1996 *
1997 * Recursive invocations don't need to erase the cursor over and
1998 * over again, so we use fbcon_bmove_rec()
1999 */
2000 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2001 p->vrows - p->yscroll);
2002 }
2003
2004 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2005 int dy, int dx, int height, int width, u_int y_break)
2006 {
2007 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2008 struct fbcon_ops *ops = info->fbcon_par;
2009 u_int b;
2010
2011 if (sy < y_break && sy + height > y_break) {
2012 b = y_break - sy;
2013 if (dy < sy) { /* Avoid trashing self */
2014 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2015 y_break);
2016 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2017 height - b, width, y_break);
2018 } else {
2019 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2020 height - b, width, y_break);
2021 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2022 y_break);
2023 }
2024 return;
2025 }
2026
2027 if (dy < y_break && dy + height > y_break) {
2028 b = y_break - dy;
2029 if (dy < sy) { /* Avoid trashing self */
2030 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2031 y_break);
2032 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2033 height - b, width, y_break);
2034 } else {
2035 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2036 height - b, width, y_break);
2037 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2038 y_break);
2039 }
2040 return;
2041 }
2042 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2043 height, width);
2044 }
2045
2046 static void updatescrollmode(struct display *p,
2047 struct fb_info *info,
2048 struct vc_data *vc)
2049 {
2050 struct fbcon_ops *ops = info->fbcon_par;
2051 int fh = vc->vc_font.height;
2052 int cap = info->flags;
2053 u16 t = 0;
2054 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2055 info->fix.xpanstep);
2056 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2057 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2058 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2059 info->var.xres_virtual);
2060 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2061 divides(ypan, vc->vc_font.height) && vyres > yres;
2062 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2063 divides(ywrap, vc->vc_font.height) &&
2064 divides(vc->vc_font.height, vyres) &&
2065 divides(vc->vc_font.height, yres);
2066 int reading_fast = cap & FBINFO_READS_FAST;
2067 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2068 !(cap & FBINFO_HWACCEL_DISABLED);
2069 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2070 !(cap & FBINFO_HWACCEL_DISABLED);
2071
2072 p->vrows = vyres/fh;
2073 if (yres > (fh * (vc->vc_rows + 1)))
2074 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2075 if ((yres % fh) && (vyres % fh < yres % fh))
2076 p->vrows--;
2077
2078 if (good_wrap || good_pan) {
2079 if (reading_fast || fast_copyarea)
2080 p->scrollmode = good_wrap ?
2081 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2082 else
2083 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2084 SCROLL_PAN_REDRAW;
2085 } else {
2086 if (reading_fast || (fast_copyarea && !fast_imageblit))
2087 p->scrollmode = SCROLL_MOVE;
2088 else
2089 p->scrollmode = SCROLL_REDRAW;
2090 }
2091 }
2092
2093 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2094 unsigned int height, unsigned int user)
2095 {
2096 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2097 struct fbcon_ops *ops = info->fbcon_par;
2098 struct display *p = &fb_display[vc->vc_num];
2099 struct fb_var_screeninfo var = info->var;
2100 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2101
2102 virt_w = FBCON_SWAP(ops->rotate, width, height);
2103 virt_h = FBCON_SWAP(ops->rotate, height, width);
2104 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2105 vc->vc_font.height);
2106 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2107 vc->vc_font.width);
2108 var.xres = virt_w * virt_fw;
2109 var.yres = virt_h * virt_fh;
2110 x_diff = info->var.xres - var.xres;
2111 y_diff = info->var.yres - var.yres;
2112 if (x_diff < 0 || x_diff > virt_fw ||
2113 y_diff < 0 || y_diff > virt_fh) {
2114 const struct fb_videomode *mode;
2115
2116 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2117 mode = fb_find_best_mode(&var, &info->modelist);
2118 if (mode == NULL)
2119 return -EINVAL;
2120 display_to_var(&var, p);
2121 fb_videomode_to_var(&var, mode);
2122
2123 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2124 return -EINVAL;
2125
2126 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2127 if (CON_IS_VISIBLE(vc)) {
2128 var.activate = FB_ACTIVATE_NOW |
2129 FB_ACTIVATE_FORCE;
2130 fb_set_var(info, &var);
2131 }
2132 var_to_display(p, &info->var, info);
2133 ops->var = info->var;
2134 }
2135 updatescrollmode(p, info, vc);
2136 return 0;
2137 }
2138
2139 static int fbcon_switch(struct vc_data *vc)
2140 {
2141 struct fb_info *info, *old_info = NULL;
2142 struct fbcon_ops *ops;
2143 struct display *p = &fb_display[vc->vc_num];
2144 struct fb_var_screeninfo var;
2145 int i, ret, prev_console, charcnt = 256;
2146
2147 info = registered_fb[con2fb_map[vc->vc_num]];
2148 ops = info->fbcon_par;
2149
2150 if (softback_top) {
2151 if (softback_lines)
2152 fbcon_set_origin(vc);
2153 softback_top = softback_curr = softback_in = softback_buf;
2154 softback_lines = 0;
2155 fbcon_update_softback(vc);
2156 }
2157
2158 if (logo_shown >= 0) {
2159 struct vc_data *conp2 = vc_cons[logo_shown].d;
2160
2161 if (conp2->vc_top == logo_lines
2162 && conp2->vc_bottom == conp2->vc_rows)
2163 conp2->vc_top = 0;
2164 logo_shown = FBCON_LOGO_CANSHOW;
2165 }
2166
2167 prev_console = ops->currcon;
2168 if (prev_console != -1)
2169 old_info = registered_fb[con2fb_map[prev_console]];
2170 /*
2171 * FIXME: If we have multiple fbdev's loaded, we need to
2172 * update all info->currcon. Perhaps, we can place this
2173 * in a centralized structure, but this might break some
2174 * drivers.
2175 *
2176 * info->currcon = vc->vc_num;
2177 */
2178 for (i = 0; i < FB_MAX; i++) {
2179 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2180 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2181
2182 o->currcon = vc->vc_num;
2183 }
2184 }
2185 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2186 display_to_var(&var, p);
2187 var.activate = FB_ACTIVATE_NOW;
2188
2189 /*
2190 * make sure we don't unnecessarily trip the memcmp()
2191 * in fb_set_var()
2192 */
2193 info->var.activate = var.activate;
2194 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2195 fb_set_var(info, &var);
2196 ops->var = info->var;
2197
2198 if (old_info != NULL && (old_info != info ||
2199 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2200 if (info->fbops->fb_set_par) {
2201 ret = info->fbops->fb_set_par(info);
2202
2203 if (ret)
2204 printk(KERN_ERR "fbcon_switch: detected "
2205 "unhandled fb_set_par error, "
2206 "error code %d\n", ret);
2207 }
2208
2209 if (old_info != info)
2210 fbcon_del_cursor_timer(old_info);
2211 }
2212
2213 if (fbcon_is_inactive(vc, info) ||
2214 ops->blank_state != FB_BLANK_UNBLANK)
2215 fbcon_del_cursor_timer(info);
2216 else
2217 fbcon_add_cursor_timer(info);
2218
2219 set_blitting_type(vc, info);
2220 ops->cursor_reset = 1;
2221
2222 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2223 ops->rotate = FB_ROTATE_UR;
2224 set_blitting_type(vc, info);
2225 }
2226
2227 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2228 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2229
2230 if (p->userfont)
2231 charcnt = FNTCHARCNT(vc->vc_font.data);
2232
2233 if (charcnt > 256)
2234 vc->vc_complement_mask <<= 1;
2235
2236 updatescrollmode(p, info, vc);
2237
2238 switch (p->scrollmode) {
2239 case SCROLL_WRAP_MOVE:
2240 scrollback_phys_max = p->vrows - vc->vc_rows;
2241 break;
2242 case SCROLL_PAN_MOVE:
2243 case SCROLL_PAN_REDRAW:
2244 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2245 if (scrollback_phys_max < 0)
2246 scrollback_phys_max = 0;
2247 break;
2248 default:
2249 scrollback_phys_max = 0;
2250 break;
2251 }
2252
2253 scrollback_max = 0;
2254 scrollback_current = 0;
2255
2256 if (!fbcon_is_inactive(vc, info)) {
2257 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2258 ops->update_start(info);
2259 }
2260
2261 fbcon_set_palette(vc, color_table);
2262 fbcon_clear_margins(vc, 0);
2263
2264 if (logo_shown == FBCON_LOGO_DRAW) {
2265
2266 logo_shown = fg_console;
2267 /* This is protected above by initmem_freed */
2268 fb_show_logo(info, ops->rotate);
2269 update_region(vc,
2270 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2271 vc->vc_size_row * (vc->vc_bottom -
2272 vc->vc_top) / 2);
2273 return 0;
2274 }
2275 return 1;
2276 }
2277
2278 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2279 int blank)
2280 {
2281 struct fb_event event;
2282
2283 if (blank) {
2284 unsigned short charmask = vc->vc_hi_font_mask ?
2285 0x1ff : 0xff;
2286 unsigned short oldc;
2287
2288 oldc = vc->vc_video_erase_char;
2289 vc->vc_video_erase_char &= charmask;
2290 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2291 vc->vc_video_erase_char = oldc;
2292 }
2293
2294
2295 if (!lock_fb_info(info))
2296 return;
2297 event.info = info;
2298 event.data = &blank;
2299 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2300 unlock_fb_info(info);
2301 }
2302
2303 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2304 {
2305 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2306 struct fbcon_ops *ops = info->fbcon_par;
2307
2308 if (mode_switch) {
2309 struct fb_var_screeninfo var = info->var;
2310
2311 ops->graphics = 1;
2312
2313 if (!blank) {
2314 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2315 fb_set_var(info, &var);
2316 ops->graphics = 0;
2317 ops->var = info->var;
2318 }
2319 }
2320
2321 if (!fbcon_is_inactive(vc, info)) {
2322 if (ops->blank_state != blank) {
2323 ops->blank_state = blank;
2324 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2325 ops->cursor_flash = (!blank);
2326
2327 if (!(info->flags & FBINFO_MISC_USEREVENT))
2328 if (fb_blank(info, blank))
2329 fbcon_generic_blank(vc, info, blank);
2330 }
2331
2332 if (!blank)
2333 update_screen(vc);
2334 }
2335
2336 if (mode_switch || fbcon_is_inactive(vc, info) ||
2337 ops->blank_state != FB_BLANK_UNBLANK)
2338 fbcon_del_cursor_timer(info);
2339 else
2340 fbcon_add_cursor_timer(info);
2341
2342 return 0;
2343 }
2344
2345 static int fbcon_debug_enter(struct vc_data *vc)
2346 {
2347 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2348 struct fbcon_ops *ops = info->fbcon_par;
2349
2350 ops->save_graphics = ops->graphics;
2351 ops->graphics = 0;
2352 if (info->fbops->fb_debug_enter)
2353 info->fbops->fb_debug_enter(info);
2354 fbcon_set_palette(vc, color_table);
2355 return 0;
2356 }
2357
2358 static int fbcon_debug_leave(struct vc_data *vc)
2359 {
2360 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2361 struct fbcon_ops *ops = info->fbcon_par;
2362
2363 ops->graphics = ops->save_graphics;
2364 if (info->fbops->fb_debug_leave)
2365 info->fbops->fb_debug_leave(info);
2366 return 0;
2367 }
2368
2369 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2370 {
2371 u8 *fontdata = vc->vc_font.data;
2372 u8 *data = font->data;
2373 int i, j;
2374
2375 font->width = vc->vc_font.width;
2376 font->height = vc->vc_font.height;
2377 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2378 if (!font->data)
2379 return 0;
2380
2381 if (font->width <= 8) {
2382 j = vc->vc_font.height;
2383 for (i = 0; i < font->charcount; i++) {
2384 memcpy(data, fontdata, j);
2385 memset(data + j, 0, 32 - j);
2386 data += 32;
2387 fontdata += j;
2388 }
2389 } else if (font->width <= 16) {
2390 j = vc->vc_font.height * 2;
2391 for (i = 0; i < font->charcount; i++) {
2392 memcpy(data, fontdata, j);
2393 memset(data + j, 0, 64 - j);
2394 data += 64;
2395 fontdata += j;
2396 }
2397 } else if (font->width <= 24) {
2398 for (i = 0; i < font->charcount; i++) {
2399 for (j = 0; j < vc->vc_font.height; j++) {
2400 *data++ = fontdata[0];
2401 *data++ = fontdata[1];
2402 *data++ = fontdata[2];
2403 fontdata += sizeof(u32);
2404 }
2405 memset(data, 0, 3 * (32 - j));
2406 data += 3 * (32 - j);
2407 }
2408 } else {
2409 j = vc->vc_font.height * 4;
2410 for (i = 0; i < font->charcount; i++) {
2411 memcpy(data, fontdata, j);
2412 memset(data + j, 0, 128 - j);
2413 data += 128;
2414 fontdata += j;
2415 }
2416 }
2417 return 0;
2418 }
2419
2420 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2421 const u8 * data, int userfont)
2422 {
2423 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2424 struct fbcon_ops *ops = info->fbcon_par;
2425 struct display *p = &fb_display[vc->vc_num];
2426 int resize;
2427 int cnt;
2428 char *old_data = NULL;
2429
2430 if (CON_IS_VISIBLE(vc) && softback_lines)
2431 fbcon_set_origin(vc);
2432
2433 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2434 if (p->userfont)
2435 old_data = vc->vc_font.data;
2436 if (userfont)
2437 cnt = FNTCHARCNT(data);
2438 else
2439 cnt = 256;
2440 vc->vc_font.data = (void *)(p->fontdata = data);
2441 if ((p->userfont = userfont))
2442 REFCOUNT(data)++;
2443 vc->vc_font.width = w;
2444 vc->vc_font.height = h;
2445 if (vc->vc_hi_font_mask && cnt == 256) {
2446 vc->vc_hi_font_mask = 0;
2447 if (vc->vc_can_do_color) {
2448 vc->vc_complement_mask >>= 1;
2449 vc->vc_s_complement_mask >>= 1;
2450 }
2451
2452 /* ++Edmund: reorder the attribute bits */
2453 if (vc->vc_can_do_color) {
2454 unsigned short *cp =
2455 (unsigned short *) vc->vc_origin;
2456 int count = vc->vc_screenbuf_size / 2;
2457 unsigned short c;
2458 for (; count > 0; count--, cp++) {
2459 c = scr_readw(cp);
2460 scr_writew(((c & 0xfe00) >> 1) |
2461 (c & 0xff), cp);
2462 }
2463 c = vc->vc_video_erase_char;
2464 vc->vc_video_erase_char =
2465 ((c & 0xfe00) >> 1) | (c & 0xff);
2466 vc->vc_attr >>= 1;
2467 }
2468 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2469 vc->vc_hi_font_mask = 0x100;
2470 if (vc->vc_can_do_color) {
2471 vc->vc_complement_mask <<= 1;
2472 vc->vc_s_complement_mask <<= 1;
2473 }
2474
2475 /* ++Edmund: reorder the attribute bits */
2476 {
2477 unsigned short *cp =
2478 (unsigned short *) vc->vc_origin;
2479 int count = vc->vc_screenbuf_size / 2;
2480 unsigned short c;
2481 for (; count > 0; count--, cp++) {
2482 unsigned short newc;
2483 c = scr_readw(cp);
2484 if (vc->vc_can_do_color)
2485 newc =
2486 ((c & 0xff00) << 1) | (c &
2487 0xff);
2488 else
2489 newc = c & ~0x100;
2490 scr_writew(newc, cp);
2491 }
2492 c = vc->vc_video_erase_char;
2493 if (vc->vc_can_do_color) {
2494 vc->vc_video_erase_char =
2495 ((c & 0xff00) << 1) | (c & 0xff);
2496 vc->vc_attr <<= 1;
2497 } else
2498 vc->vc_video_erase_char = c & ~0x100;
2499 }
2500
2501 }
2502
2503 if (resize) {
2504 int cols, rows;
2505
2506 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2507 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2508 cols /= w;
2509 rows /= h;
2510 vc_resize(vc, cols, rows);
2511 if (CON_IS_VISIBLE(vc) && softback_buf)
2512 fbcon_update_softback(vc);
2513 } else if (CON_IS_VISIBLE(vc)
2514 && vc->vc_mode == KD_TEXT) {
2515 fbcon_clear_margins(vc, 0);
2516 update_screen(vc);
2517 }
2518
2519 if (old_data && (--REFCOUNT(old_data) == 0))
2520 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2521 return 0;
2522 }
2523
2524 static int fbcon_copy_font(struct vc_data *vc, int con)
2525 {
2526 struct display *od = &fb_display[con];
2527 struct console_font *f = &vc->vc_font;
2528
2529 if (od->fontdata == f->data)
2530 return 0; /* already the same font... */
2531 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2532 }
2533
2534 /*
2535 * User asked to set font; we are guaranteed that
2536 * a) width and height are in range 1..32
2537 * b) charcount does not exceed 512
2538 * but lets not assume that, since someone might someday want to use larger
2539 * fonts. And charcount of 512 is small for unicode support.
2540 *
2541 * However, user space gives the font in 32 rows , regardless of
2542 * actual font height. So a new API is needed if support for larger fonts
2543 * is ever implemented.
2544 */
2545
2546 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2547 {
2548 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2549 unsigned charcount = font->charcount;
2550 int w = font->width;
2551 int h = font->height;
2552 int size;
2553 int i, csum;
2554 u8 *new_data, *data = font->data;
2555 int pitch = (font->width+7) >> 3;
2556
2557 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2558 * If not this check should be changed to charcount < 256 */
2559 if (charcount != 256 && charcount != 512)
2560 return -EINVAL;
2561
2562 /* Make sure drawing engine can handle the font */
2563 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2564 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2565 return -EINVAL;
2566
2567 /* Make sure driver can handle the font length */
2568 if (fbcon_invalid_charcount(info, charcount))
2569 return -EINVAL;
2570
2571 size = h * pitch * charcount;
2572
2573 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2574
2575 if (!new_data)
2576 return -ENOMEM;
2577
2578 new_data += FONT_EXTRA_WORDS * sizeof(int);
2579 FNTSIZE(new_data) = size;
2580 FNTCHARCNT(new_data) = charcount;
2581 REFCOUNT(new_data) = 0; /* usage counter */
2582 for (i=0; i< charcount; i++) {
2583 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2584 }
2585
2586 /* Since linux has a nice crc32 function use it for counting font
2587 * checksums. */
2588 csum = crc32(0, new_data, size);
2589
2590 FNTSUM(new_data) = csum;
2591 /* Check if the same font is on some other console already */
2592 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2593 struct vc_data *tmp = vc_cons[i].d;
2594
2595 if (fb_display[i].userfont &&
2596 fb_display[i].fontdata &&
2597 FNTSUM(fb_display[i].fontdata) == csum &&
2598 FNTSIZE(fb_display[i].fontdata) == size &&
2599 tmp->vc_font.width == w &&
2600 !memcmp(fb_display[i].fontdata, new_data, size)) {
2601 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2602 new_data = (u8 *)fb_display[i].fontdata;
2603 break;
2604 }
2605 }
2606 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2607 }
2608
2609 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2610 {
2611 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2612 const struct font_desc *f;
2613
2614 if (!name)
2615 f = get_default_font(info->var.xres, info->var.yres,
2616 info->pixmap.blit_x, info->pixmap.blit_y);
2617 else if (!(f = find_font(name)))
2618 return -ENOENT;
2619
2620 font->width = f->width;
2621 font->height = f->height;
2622 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2623 }
2624
2625 static u16 palette_red[16];
2626 static u16 palette_green[16];
2627 static u16 palette_blue[16];
2628
2629 static struct fb_cmap palette_cmap = {
2630 0, 16, palette_red, palette_green, palette_blue, NULL
2631 };
2632
2633 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2634 {
2635 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2636 int i, j, k, depth;
2637 u8 val;
2638
2639 if (fbcon_is_inactive(vc, info))
2640 return -EINVAL;
2641
2642 if (!CON_IS_VISIBLE(vc))
2643 return 0;
2644
2645 depth = fb_get_color_depth(&info->var, &info->fix);
2646 if (depth > 3) {
2647 for (i = j = 0; i < 16; i++) {
2648 k = table[i];
2649 val = vc->vc_palette[j++];
2650 palette_red[k] = (val << 8) | val;
2651 val = vc->vc_palette[j++];
2652 palette_green[k] = (val << 8) | val;
2653 val = vc->vc_palette[j++];
2654 palette_blue[k] = (val << 8) | val;
2655 }
2656 palette_cmap.len = 16;
2657 palette_cmap.start = 0;
2658 /*
2659 * If framebuffer is capable of less than 16 colors,
2660 * use default palette of fbcon.
2661 */
2662 } else
2663 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2664
2665 return fb_set_cmap(&palette_cmap, info);
2666 }
2667
2668 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2669 {
2670 unsigned long p;
2671 int line;
2672
2673 if (vc->vc_num != fg_console || !softback_lines)
2674 return (u16 *) (vc->vc_origin + offset);
2675 line = offset / vc->vc_size_row;
2676 if (line >= softback_lines)
2677 return (u16 *) (vc->vc_origin + offset -
2678 softback_lines * vc->vc_size_row);
2679 p = softback_curr + offset;
2680 if (p >= softback_end)
2681 p += softback_buf - softback_end;
2682 return (u16 *) p;
2683 }
2684
2685 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2686 int *px, int *py)
2687 {
2688 unsigned long ret;
2689 int x, y;
2690
2691 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2692 unsigned long offset = (pos - vc->vc_origin) / 2;
2693
2694 x = offset % vc->vc_cols;
2695 y = offset / vc->vc_cols;
2696 if (vc->vc_num == fg_console)
2697 y += softback_lines;
2698 ret = pos + (vc->vc_cols - x) * 2;
2699 } else if (vc->vc_num == fg_console && softback_lines) {
2700 unsigned long offset = pos - softback_curr;
2701
2702 if (pos < softback_curr)
2703 offset += softback_end - softback_buf;
2704 offset /= 2;
2705 x = offset % vc->vc_cols;
2706 y = offset / vc->vc_cols;
2707 ret = pos + (vc->vc_cols - x) * 2;
2708 if (ret == softback_end)
2709 ret = softback_buf;
2710 if (ret == softback_in)
2711 ret = vc->vc_origin;
2712 } else {
2713 /* Should not happen */
2714 x = y = 0;
2715 ret = vc->vc_origin;
2716 }
2717 if (px)
2718 *px = x;
2719 if (py)
2720 *py = y;
2721 return ret;
2722 }
2723
2724 /* As we might be inside of softback, we may work with non-contiguous buffer,
2725 that's why we have to use a separate routine. */
2726 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2727 {
2728 while (cnt--) {
2729 u16 a = scr_readw(p);
2730 if (!vc->vc_can_do_color)
2731 a ^= 0x0800;
2732 else if (vc->vc_hi_font_mask == 0x100)
2733 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2734 (((a) & 0x0e00) << 4);
2735 else
2736 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2737 (((a) & 0x0700) << 4);
2738 scr_writew(a, p++);
2739 if (p == (u16 *) softback_end)
2740 p = (u16 *) softback_buf;
2741 if (p == (u16 *) softback_in)
2742 p = (u16 *) vc->vc_origin;
2743 }
2744 }
2745
2746 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2747 {
2748 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2749 struct fbcon_ops *ops = info->fbcon_par;
2750 struct display *disp = &fb_display[fg_console];
2751 int offset, limit, scrollback_old;
2752
2753 if (softback_top) {
2754 if (vc->vc_num != fg_console)
2755 return 0;
2756 if (vc->vc_mode != KD_TEXT || !lines)
2757 return 0;
2758 if (logo_shown >= 0) {
2759 struct vc_data *conp2 = vc_cons[logo_shown].d;
2760
2761 if (conp2->vc_top == logo_lines
2762 && conp2->vc_bottom == conp2->vc_rows)
2763 conp2->vc_top = 0;
2764 if (logo_shown == vc->vc_num) {
2765 unsigned long p, q;
2766 int i;
2767
2768 p = softback_in;
2769 q = vc->vc_origin +
2770 logo_lines * vc->vc_size_row;
2771 for (i = 0; i < logo_lines; i++) {
2772 if (p == softback_top)
2773 break;
2774 if (p == softback_buf)
2775 p = softback_end;
2776 p -= vc->vc_size_row;
2777 q -= vc->vc_size_row;
2778 scr_memcpyw((u16 *) q, (u16 *) p,
2779 vc->vc_size_row);
2780 }
2781 softback_in = softback_curr = p;
2782 update_region(vc, vc->vc_origin,
2783 logo_lines * vc->vc_cols);
2784 }
2785 logo_shown = FBCON_LOGO_CANSHOW;
2786 }
2787 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2788 fbcon_redraw_softback(vc, disp, lines);
2789 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2790 return 0;
2791 }
2792
2793 if (!scrollback_phys_max)
2794 return -ENOSYS;
2795
2796 scrollback_old = scrollback_current;
2797 scrollback_current -= lines;
2798 if (scrollback_current < 0)
2799 scrollback_current = 0;
2800 else if (scrollback_current > scrollback_max)
2801 scrollback_current = scrollback_max;
2802 if (scrollback_current == scrollback_old)
2803 return 0;
2804
2805 if (fbcon_is_inactive(vc, info))
2806 return 0;
2807
2808 fbcon_cursor(vc, CM_ERASE);
2809
2810 offset = disp->yscroll - scrollback_current;
2811 limit = disp->vrows;
2812 switch (disp->scrollmode) {
2813 case SCROLL_WRAP_MOVE:
2814 info->var.vmode |= FB_VMODE_YWRAP;
2815 break;
2816 case SCROLL_PAN_MOVE:
2817 case SCROLL_PAN_REDRAW:
2818 limit -= vc->vc_rows;
2819 info->var.vmode &= ~FB_VMODE_YWRAP;
2820 break;
2821 }
2822 if (offset < 0)
2823 offset += limit;
2824 else if (offset >= limit)
2825 offset -= limit;
2826
2827 ops->var.xoffset = 0;
2828 ops->var.yoffset = offset * vc->vc_font.height;
2829 ops->update_start(info);
2830
2831 if (!scrollback_current)
2832 fbcon_cursor(vc, CM_DRAW);
2833 return 0;
2834 }
2835
2836 static int fbcon_set_origin(struct vc_data *vc)
2837 {
2838 if (softback_lines)
2839 fbcon_scrolldelta(vc, softback_lines);
2840 return 0;
2841 }
2842
2843 static void fbcon_suspended(struct fb_info *info)
2844 {
2845 struct vc_data *vc = NULL;
2846 struct fbcon_ops *ops = info->fbcon_par;
2847
2848 if (!ops || ops->currcon < 0)
2849 return;
2850 vc = vc_cons[ops->currcon].d;
2851
2852 /* Clear cursor, restore saved data */
2853 fbcon_cursor(vc, CM_ERASE);
2854 }
2855
2856 static void fbcon_resumed(struct fb_info *info)
2857 {
2858 struct vc_data *vc;
2859 struct fbcon_ops *ops = info->fbcon_par;
2860
2861 if (!ops || ops->currcon < 0)
2862 return;
2863 vc = vc_cons[ops->currcon].d;
2864
2865 update_screen(vc);
2866 }
2867
2868 static void fbcon_modechanged(struct fb_info *info)
2869 {
2870 struct fbcon_ops *ops = info->fbcon_par;
2871 struct vc_data *vc;
2872 struct display *p;
2873 int rows, cols;
2874
2875 if (!ops || ops->currcon < 0)
2876 return;
2877 vc = vc_cons[ops->currcon].d;
2878 if (vc->vc_mode != KD_TEXT ||
2879 registered_fb[con2fb_map[ops->currcon]] != info)
2880 return;
2881
2882 p = &fb_display[vc->vc_num];
2883 set_blitting_type(vc, info);
2884
2885 if (CON_IS_VISIBLE(vc)) {
2886 var_to_display(p, &info->var, info);
2887 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2888 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2889 cols /= vc->vc_font.width;
2890 rows /= vc->vc_font.height;
2891 vc_resize(vc, cols, rows);
2892 updatescrollmode(p, info, vc);
2893 scrollback_max = 0;
2894 scrollback_current = 0;
2895
2896 if (!fbcon_is_inactive(vc, info)) {
2897 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2898 ops->update_start(info);
2899 }
2900
2901 fbcon_set_palette(vc, color_table);
2902 update_screen(vc);
2903 if (softback_buf)
2904 fbcon_update_softback(vc);
2905 }
2906 }
2907
2908 static void fbcon_set_all_vcs(struct fb_info *info)
2909 {
2910 struct fbcon_ops *ops = info->fbcon_par;
2911 struct vc_data *vc;
2912 struct display *p;
2913 int i, rows, cols, fg = -1;
2914
2915 if (!ops || ops->currcon < 0)
2916 return;
2917
2918 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2919 vc = vc_cons[i].d;
2920 if (!vc || vc->vc_mode != KD_TEXT ||
2921 registered_fb[con2fb_map[i]] != info)
2922 continue;
2923
2924 if (CON_IS_VISIBLE(vc)) {
2925 fg = i;
2926 continue;
2927 }
2928
2929 p = &fb_display[vc->vc_num];
2930 set_blitting_type(vc, info);
2931 var_to_display(p, &info->var, info);
2932 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2933 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2934 cols /= vc->vc_font.width;
2935 rows /= vc->vc_font.height;
2936 vc_resize(vc, cols, rows);
2937 }
2938
2939 if (fg != -1)
2940 fbcon_modechanged(info);
2941 }
2942
2943 static int fbcon_mode_deleted(struct fb_info *info,
2944 struct fb_videomode *mode)
2945 {
2946 struct fb_info *fb_info;
2947 struct display *p;
2948 int i, j, found = 0;
2949
2950 /* before deletion, ensure that mode is not in use */
2951 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2952 j = con2fb_map[i];
2953 if (j == -1)
2954 continue;
2955 fb_info = registered_fb[j];
2956 if (fb_info != info)
2957 continue;
2958 p = &fb_display[i];
2959 if (!p || !p->mode)
2960 continue;
2961 if (fb_mode_is_equal(p->mode, mode)) {
2962 found = 1;
2963 break;
2964 }
2965 }
2966 return found;
2967 }
2968
2969 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2970 static int fbcon_unbind(void)
2971 {
2972 int ret;
2973
2974 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2975 fbcon_is_default);
2976
2977 if (!ret)
2978 fbcon_has_console_bind = 0;
2979
2980 return ret;
2981 }
2982 #else
2983 static inline int fbcon_unbind(void)
2984 {
2985 return -EINVAL;
2986 }
2987 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2988
2989 static int fbcon_fb_unbind(int idx)
2990 {
2991 int i, new_idx = -1, ret = 0;
2992
2993 if (!fbcon_has_console_bind)
2994 return 0;
2995
2996 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997 if (con2fb_map[i] != idx &&
2998 con2fb_map[i] != -1) {
2999 new_idx = i;
3000 break;
3001 }
3002 }
3003
3004 if (new_idx != -1) {
3005 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3006 if (con2fb_map[i] == idx)
3007 set_con2fb_map(i, new_idx, 0);
3008 }
3009 } else
3010 ret = fbcon_unbind();
3011
3012 return ret;
3013 }
3014
3015 static int fbcon_fb_unregistered(struct fb_info *info)
3016 {
3017 int i, idx;
3018
3019 idx = info->node;
3020 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3021 if (con2fb_map[i] == idx)
3022 con2fb_map[i] = -1;
3023 }
3024
3025 if (idx == info_idx) {
3026 info_idx = -1;
3027
3028 for (i = 0; i < FB_MAX; i++) {
3029 if (registered_fb[i] != NULL) {
3030 info_idx = i;
3031 break;
3032 }
3033 }
3034 }
3035
3036 if (info_idx != -1) {
3037 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3038 if (con2fb_map[i] == -1)
3039 con2fb_map[i] = info_idx;
3040 }
3041 }
3042
3043 if (primary_device == idx)
3044 primary_device = -1;
3045
3046 if (!num_registered_fb)
3047 unregister_con_driver(&fb_con);
3048
3049 return 0;
3050 }
3051
3052 static void fbcon_remap_all(int idx)
3053 {
3054 int i;
3055 for (i = first_fb_vc; i <= last_fb_vc; i++)
3056 set_con2fb_map(i, idx, 0);
3057
3058 if (con_is_bound(&fb_con)) {
3059 printk(KERN_INFO "fbcon: Remapping primary device, "
3060 "fb%i, to tty %i-%i\n", idx,
3061 first_fb_vc + 1, last_fb_vc + 1);
3062 info_idx = idx;
3063 }
3064 }
3065
3066 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3067 static void fbcon_select_primary(struct fb_info *info)
3068 {
3069 if (!map_override && primary_device == -1 &&
3070 fb_is_primary_device(info)) {
3071 int i;
3072
3073 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3074 info->fix.id, info->node);
3075 primary_device = info->node;
3076
3077 for (i = first_fb_vc; i <= last_fb_vc; i++)
3078 con2fb_map_boot[i] = primary_device;
3079
3080 if (con_is_bound(&fb_con)) {
3081 printk(KERN_INFO "fbcon: Remapping primary device, "
3082 "fb%i, to tty %i-%i\n", info->node,
3083 first_fb_vc + 1, last_fb_vc + 1);
3084 info_idx = primary_device;
3085 }
3086 }
3087
3088 }
3089 #else
3090 static inline void fbcon_select_primary(struct fb_info *info)
3091 {
3092 return;
3093 }
3094 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3095
3096 static int fbcon_fb_registered(struct fb_info *info)
3097 {
3098 int ret = 0, i, idx;
3099
3100 idx = info->node;
3101 fbcon_select_primary(info);
3102
3103 if (info_idx == -1) {
3104 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3105 if (con2fb_map_boot[i] == idx) {
3106 info_idx = idx;
3107 break;
3108 }
3109 }
3110
3111 if (info_idx != -1)
3112 ret = fbcon_takeover(1);
3113 } else {
3114 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3115 if (con2fb_map_boot[i] == idx)
3116 set_con2fb_map(i, idx, 0);
3117 }
3118 }
3119
3120 return ret;
3121 }
3122
3123 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3124 {
3125 struct fbcon_ops *ops = info->fbcon_par;
3126 struct vc_data *vc;
3127
3128 if (!ops || ops->currcon < 0)
3129 return;
3130
3131 vc = vc_cons[ops->currcon].d;
3132 if (vc->vc_mode != KD_TEXT ||
3133 registered_fb[con2fb_map[ops->currcon]] != info)
3134 return;
3135
3136 if (CON_IS_VISIBLE(vc)) {
3137 if (blank)
3138 do_blank_screen(0);
3139 else
3140 do_unblank_screen(0);
3141 }
3142 ops->blank_state = blank;
3143 }
3144
3145 static void fbcon_new_modelist(struct fb_info *info)
3146 {
3147 int i;
3148 struct vc_data *vc;
3149 struct fb_var_screeninfo var;
3150 const struct fb_videomode *mode;
3151
3152 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3153 if (registered_fb[con2fb_map[i]] != info)
3154 continue;
3155 if (!fb_display[i].mode)
3156 continue;
3157 vc = vc_cons[i].d;
3158 display_to_var(&var, &fb_display[i]);
3159 mode = fb_find_nearest_mode(fb_display[i].mode,
3160 &info->modelist);
3161 fb_videomode_to_var(&var, mode);
3162 fbcon_set_disp(info, &var, vc->vc_num);
3163 }
3164 }
3165
3166 static void fbcon_get_requirement(struct fb_info *info,
3167 struct fb_blit_caps *caps)
3168 {
3169 struct vc_data *vc;
3170 struct display *p;
3171
3172 if (caps->flags) {
3173 int i, charcnt;
3174
3175 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3176 vc = vc_cons[i].d;
3177 if (vc && vc->vc_mode == KD_TEXT &&
3178 info->node == con2fb_map[i]) {
3179 p = &fb_display[i];
3180 caps->x |= 1 << (vc->vc_font.width - 1);
3181 caps->y |= 1 << (vc->vc_font.height - 1);
3182 charcnt = (p->userfont) ?
3183 FNTCHARCNT(p->fontdata) : 256;
3184 if (caps->len < charcnt)
3185 caps->len = charcnt;
3186 }
3187 }
3188 } else {
3189 vc = vc_cons[fg_console].d;
3190
3191 if (vc && vc->vc_mode == KD_TEXT &&
3192 info->node == con2fb_map[fg_console]) {
3193 p = &fb_display[fg_console];
3194 caps->x = 1 << (vc->vc_font.width - 1);
3195 caps->y = 1 << (vc->vc_font.height - 1);
3196 caps->len = (p->userfont) ?
3197 FNTCHARCNT(p->fontdata) : 256;
3198 }
3199 }
3200 }
3201
3202 static int fbcon_event_notify(struct notifier_block *self,
3203 unsigned long action, void *data)
3204 {
3205 struct fb_event *event = data;
3206 struct fb_info *info = event->info;
3207 struct fb_videomode *mode;
3208 struct fb_con2fbmap *con2fb;
3209 struct fb_blit_caps *caps;
3210 int idx, ret = 0;
3211
3212 /*
3213 * ignore all events except driver registration and deregistration
3214 * if fbcon is not active
3215 */
3216 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3217 action == FB_EVENT_FB_UNREGISTERED))
3218 goto done;
3219
3220 switch(action) {
3221 case FB_EVENT_SUSPEND:
3222 fbcon_suspended(info);
3223 break;
3224 case FB_EVENT_RESUME:
3225 fbcon_resumed(info);
3226 break;
3227 case FB_EVENT_MODE_CHANGE:
3228 fbcon_modechanged(info);
3229 break;
3230 case FB_EVENT_MODE_CHANGE_ALL:
3231 fbcon_set_all_vcs(info);
3232 break;
3233 case FB_EVENT_MODE_DELETE:
3234 mode = event->data;
3235 ret = fbcon_mode_deleted(info, mode);
3236 break;
3237 case FB_EVENT_FB_UNBIND:
3238 idx = info->node;
3239 ret = fbcon_fb_unbind(idx);
3240 break;
3241 case FB_EVENT_FB_REGISTERED:
3242 ret = fbcon_fb_registered(info);
3243 break;
3244 case FB_EVENT_FB_UNREGISTERED:
3245 ret = fbcon_fb_unregistered(info);
3246 break;
3247 case FB_EVENT_SET_CONSOLE_MAP:
3248 con2fb = event->data;
3249 ret = set_con2fb_map(con2fb->console - 1,
3250 con2fb->framebuffer, 1);
3251 break;
3252 case FB_EVENT_GET_CONSOLE_MAP:
3253 con2fb = event->data;
3254 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3255 break;
3256 case FB_EVENT_BLANK:
3257 fbcon_fb_blanked(info, *(int *)event->data);
3258 break;
3259 case FB_EVENT_NEW_MODELIST:
3260 fbcon_new_modelist(info);
3261 break;
3262 case FB_EVENT_GET_REQ:
3263 caps = event->data;
3264 fbcon_get_requirement(info, caps);
3265 break;
3266 case FB_EVENT_REMAP_ALL_CONSOLE:
3267 idx = info->node;
3268 fbcon_remap_all(idx);
3269 break;
3270 }
3271 done:
3272 return ret;
3273 }
3274
3275 /*
3276 * The console `switch' structure for the frame buffer based console
3277 */
3278
3279 static const struct consw fb_con = {
3280 .owner = THIS_MODULE,
3281 .con_startup = fbcon_startup,
3282 .con_init = fbcon_init,
3283 .con_deinit = fbcon_deinit,
3284 .con_clear = fbcon_clear,
3285 .con_putc = fbcon_putc,
3286 .con_putcs = fbcon_putcs,
3287 .con_cursor = fbcon_cursor,
3288 .con_scroll = fbcon_scroll,
3289 .con_bmove = fbcon_bmove,
3290 .con_switch = fbcon_switch,
3291 .con_blank = fbcon_blank,
3292 .con_font_set = fbcon_set_font,
3293 .con_font_get = fbcon_get_font,
3294 .con_font_default = fbcon_set_def_font,
3295 .con_font_copy = fbcon_copy_font,
3296 .con_set_palette = fbcon_set_palette,
3297 .con_scrolldelta = fbcon_scrolldelta,
3298 .con_set_origin = fbcon_set_origin,
3299 .con_invert_region = fbcon_invert_region,
3300 .con_screen_pos = fbcon_screen_pos,
3301 .con_getxy = fbcon_getxy,
3302 .con_resize = fbcon_resize,
3303 .con_debug_enter = fbcon_debug_enter,
3304 .con_debug_leave = fbcon_debug_leave,
3305 };
3306
3307 static struct notifier_block fbcon_event_notifier = {
3308 .notifier_call = fbcon_event_notify,
3309 };
3310
3311 static ssize_t store_rotate(struct device *device,
3312 struct device_attribute *attr, const char *buf,
3313 size_t count)
3314 {
3315 struct fb_info *info;
3316 int rotate, idx;
3317 char **last = NULL;
3318
3319 if (fbcon_has_exited)
3320 return count;
3321
3322 console_lock();
3323 idx = con2fb_map[fg_console];
3324
3325 if (idx == -1 || registered_fb[idx] == NULL)
3326 goto err;
3327
3328 info = registered_fb[idx];
3329 rotate = simple_strtoul(buf, last, 0);
3330 fbcon_rotate(info, rotate);
3331 err:
3332 console_unlock();
3333 return count;
3334 }
3335
3336 static ssize_t store_rotate_all(struct device *device,
3337 struct device_attribute *attr,const char *buf,
3338 size_t count)
3339 {
3340 struct fb_info *info;
3341 int rotate, idx;
3342 char **last = NULL;
3343
3344 if (fbcon_has_exited)
3345 return count;
3346
3347 console_lock();
3348 idx = con2fb_map[fg_console];
3349
3350 if (idx == -1 || registered_fb[idx] == NULL)
3351 goto err;
3352
3353 info = registered_fb[idx];
3354 rotate = simple_strtoul(buf, last, 0);
3355 fbcon_rotate_all(info, rotate);
3356 err:
3357 console_unlock();
3358 return count;
3359 }
3360
3361 static ssize_t show_rotate(struct device *device,
3362 struct device_attribute *attr,char *buf)
3363 {
3364 struct fb_info *info;
3365 int rotate = 0, idx;
3366
3367 if (fbcon_has_exited)
3368 return 0;
3369
3370 console_lock();
3371 idx = con2fb_map[fg_console];
3372
3373 if (idx == -1 || registered_fb[idx] == NULL)
3374 goto err;
3375
3376 info = registered_fb[idx];
3377 rotate = fbcon_get_rotate(info);
3378 err:
3379 console_unlock();
3380 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3381 }
3382
3383 static ssize_t show_cursor_blink(struct device *device,
3384 struct device_attribute *attr, char *buf)
3385 {
3386 struct fb_info *info;
3387 struct fbcon_ops *ops;
3388 int idx, blink = -1;
3389
3390 if (fbcon_has_exited)
3391 return 0;
3392
3393 console_lock();
3394 idx = con2fb_map[fg_console];
3395
3396 if (idx == -1 || registered_fb[idx] == NULL)
3397 goto err;
3398
3399 info = registered_fb[idx];
3400 ops = info->fbcon_par;
3401
3402 if (!ops)
3403 goto err;
3404
3405 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3406 err:
3407 console_unlock();
3408 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3409 }
3410
3411 static ssize_t store_cursor_blink(struct device *device,
3412 struct device_attribute *attr,
3413 const char *buf, size_t count)
3414 {
3415 struct fb_info *info;
3416 int blink, idx;
3417 char **last = NULL;
3418
3419 if (fbcon_has_exited)
3420 return count;
3421
3422 console_lock();
3423 idx = con2fb_map[fg_console];
3424
3425 if (idx == -1 || registered_fb[idx] == NULL)
3426 goto err;
3427
3428 info = registered_fb[idx];
3429
3430 if (!info->fbcon_par)
3431 goto err;
3432
3433 blink = simple_strtoul(buf, last, 0);
3434
3435 if (blink) {
3436 fbcon_cursor_noblink = 0;
3437 fbcon_add_cursor_timer(info);
3438 } else {
3439 fbcon_cursor_noblink = 1;
3440 fbcon_del_cursor_timer(info);
3441 }
3442
3443 err:
3444 console_unlock();
3445 return count;
3446 }
3447
3448 static struct device_attribute device_attrs[] = {
3449 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3450 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3451 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3452 store_cursor_blink),
3453 };
3454
3455 static int fbcon_init_device(void)
3456 {
3457 int i, error = 0;
3458
3459 fbcon_has_sysfs = 1;
3460
3461 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3462 error = device_create_file(fbcon_device, &device_attrs[i]);
3463
3464 if (error)
3465 break;
3466 }
3467
3468 if (error) {
3469 while (--i >= 0)
3470 device_remove_file(fbcon_device, &device_attrs[i]);
3471
3472 fbcon_has_sysfs = 0;
3473 }
3474
3475 return 0;
3476 }
3477
3478 static void fbcon_start(void)
3479 {
3480 if (num_registered_fb) {
3481 int i;
3482
3483 console_lock();
3484
3485 for (i = 0; i < FB_MAX; i++) {
3486 if (registered_fb[i] != NULL) {
3487 info_idx = i;
3488 break;
3489 }
3490 }
3491
3492 console_unlock();
3493 fbcon_takeover(0);
3494 }
3495 }
3496
3497 static void fbcon_exit(void)
3498 {
3499 struct fb_info *info;
3500 int i, j, mapped;
3501
3502 if (fbcon_has_exited)
3503 return;
3504
3505 kfree((void *)softback_buf);
3506 softback_buf = 0UL;
3507
3508 for (i = 0; i < FB_MAX; i++) {
3509 int pending = 0;
3510
3511 mapped = 0;
3512 info = registered_fb[i];
3513
3514 if (info == NULL)
3515 continue;
3516
3517 if (info->queue.func)
3518 pending = cancel_work_sync(&info->queue);
3519 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3520 "no"));
3521
3522 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3523 if (con2fb_map[j] == i)
3524 mapped = 1;
3525 }
3526
3527 if (mapped) {
3528 if (info->fbops->fb_release)
3529 info->fbops->fb_release(info, 0);
3530 module_put(info->fbops->owner);
3531
3532 if (info->fbcon_par) {
3533 struct fbcon_ops *ops = info->fbcon_par;
3534
3535 fbcon_del_cursor_timer(info);
3536 kfree(ops->cursor_src);
3537 kfree(info->fbcon_par);
3538 info->fbcon_par = NULL;
3539 }
3540
3541 if (info->queue.func == fb_flashcursor)
3542 info->queue.func = NULL;
3543 }
3544 }
3545
3546 fbcon_has_exited = 1;
3547 }
3548
3549 static int __init fb_console_init(void)
3550 {
3551 int i;
3552
3553 console_lock();
3554 fb_register_client(&fbcon_event_notifier);
3555 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3556 "fbcon");
3557
3558 if (IS_ERR(fbcon_device)) {
3559 printk(KERN_WARNING "Unable to create device "
3560 "for fbcon; errno = %ld\n",
3561 PTR_ERR(fbcon_device));
3562 fbcon_device = NULL;
3563 } else
3564 fbcon_init_device();
3565
3566 for (i = 0; i < MAX_NR_CONSOLES; i++)
3567 con2fb_map[i] = -1;
3568
3569 console_unlock();
3570 fbcon_start();
3571 return 0;
3572 }
3573
3574 module_init(fb_console_init);
3575
3576 #ifdef MODULE
3577
3578 static void __exit fbcon_deinit_device(void)
3579 {
3580 int i;
3581
3582 if (fbcon_has_sysfs) {
3583 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3584 device_remove_file(fbcon_device, &device_attrs[i]);
3585
3586 fbcon_has_sysfs = 0;
3587 }
3588 }
3589
3590 static void __exit fb_console_exit(void)
3591 {
3592 console_lock();
3593 fb_unregister_client(&fbcon_event_notifier);
3594 fbcon_deinit_device();
3595 device_destroy(fb_class, MKDEV(0, 0));
3596 fbcon_exit();
3597 console_unlock();
3598 unregister_con_driver(&fb_con);
3599 }
3600
3601 module_exit(fb_console_exit);
3602
3603 #endif
3604
3605 MODULE_LICENSE("GPL");