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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / video / console / fbcon.c
bloba3df48b399a1e8821aa759734d32c8fa406fb6f7
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 display *p;
374 struct vc_data *vc = NULL;
375 int c;
376 int mode;
377
378 acquire_console_sem();
379 if (ops && ops->currcon != -1)
380 vc = vc_cons[ops->currcon].d;
381
382 if (!vc || !CON_IS_VISIBLE(vc) ||
383 registered_fb[con2fb_map[vc->vc_num]] != info ||
384 vc->vc_deccm != 1) {
385 release_console_sem();
386 return;
387 }
388
389 p = &fb_display[vc->vc_num];
390 c = scr_readw((u16 *) vc->vc_pos);
391 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
392 CM_ERASE : CM_DRAW;
393 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
394 get_color(vc, info, c, 0));
395 release_console_sem();
396 }
397
398 static void cursor_timer_handler(unsigned long dev_addr)
399 {
400 struct fb_info *info = (struct fb_info *) dev_addr;
401 struct fbcon_ops *ops = info->fbcon_par;
402
403 schedule_work(&info->queue);
404 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
405 }
406
407 static void fbcon_add_cursor_timer(struct fb_info *info)
408 {
409 struct fbcon_ops *ops = info->fbcon_par;
410
411 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
412 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
413 !fbcon_cursor_noblink) {
414 if (!info->queue.func)
415 INIT_WORK(&info->queue, fb_flashcursor);
416
417 init_timer(&ops->cursor_timer);
418 ops->cursor_timer.function = cursor_timer_handler;
419 ops->cursor_timer.expires = jiffies + HZ / 5;
420 ops->cursor_timer.data = (unsigned long ) info;
421 add_timer(&ops->cursor_timer);
422 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
423 }
424 }
425
426 static void fbcon_del_cursor_timer(struct fb_info *info)
427 {
428 struct fbcon_ops *ops = info->fbcon_par;
429
430 if (info->queue.func == fb_flashcursor &&
431 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
432 del_timer_sync(&ops->cursor_timer);
433 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
434 }
435 }
436
437 #ifndef MODULE
438 static int __init fb_console_setup(char *this_opt)
439 {
440 char *options;
441 int i, j;
442
443 if (!this_opt || !*this_opt)
444 return 1;
445
446 while ((options = strsep(&this_opt, ",")) != NULL) {
447 if (!strncmp(options, "font:", 5))
448 strcpy(fontname, options + 5);
449
450 if (!strncmp(options, "scrollback:", 11)) {
451 options += 11;
452 if (*options) {
453 fbcon_softback_size = simple_strtoul(options, &options, 0);
454 if (*options == 'k' || *options == 'K') {
455 fbcon_softback_size *= 1024;
456 options++;
457 }
458 if (*options != ',')
459 return 1;
460 options++;
461 } else
462 return 1;
463 }
464
465 if (!strncmp(options, "map:", 4)) {
466 options += 4;
467 if (*options) {
468 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
469 if (!options[j])
470 j = 0;
471 con2fb_map_boot[i] =
472 (options[j++]-'0') % FB_MAX;
473 }
474
475 fbcon_map_override();
476 }
477
478 return 1;
479 }
480
481 if (!strncmp(options, "vc:", 3)) {
482 options += 3;
483 if (*options)
484 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
485 if (first_fb_vc < 0)
486 first_fb_vc = 0;
487 if (*options++ == '-')
488 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
489 fbcon_is_default = 0;
490 }
491
492 if (!strncmp(options, "rotate:", 7)) {
493 options += 7;
494 if (*options)
495 initial_rotation = simple_strtoul(options, &options, 0);
496 if (initial_rotation > 3)
497 initial_rotation = 0;
498 }
499 }
500 return 1;
501 }
502
503 __setup("fbcon=", fb_console_setup);
504 #endif
505
506 static int search_fb_in_map(int idx)
507 {
508 int i, retval = 0;
509
510 for (i = first_fb_vc; i <= last_fb_vc; i++) {
511 if (con2fb_map[i] == idx)
512 retval = 1;
513 }
514 return retval;
515 }
516
517 static int search_for_mapped_con(void)
518 {
519 int i, retval = 0;
520
521 for (i = first_fb_vc; i <= last_fb_vc; i++) {
522 if (con2fb_map[i] != -1)
523 retval = 1;
524 }
525 return retval;
526 }
527
528 static int fbcon_takeover(int show_logo)
529 {
530 int err, i;
531
532 if (!num_registered_fb)
533 return -ENODEV;
534
535 if (!show_logo)
536 logo_shown = FBCON_LOGO_DONTSHOW;
537
538 for (i = first_fb_vc; i <= last_fb_vc; i++)
539 con2fb_map[i] = info_idx;
540
541 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
542 fbcon_is_default);
543
544 if (err) {
545 for (i = first_fb_vc; i <= last_fb_vc; i++) {
546 con2fb_map[i] = -1;
547 }
548 info_idx = -1;
549 } else {
550 fbcon_has_console_bind = 1;
551 }
552
553 return err;
554 }
555
556 #ifdef MODULE
557 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
558 int cols, int rows, int new_cols, int new_rows)
559 {
560 logo_shown = FBCON_LOGO_DONTSHOW;
561 }
562 #else
563 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
564 int cols, int rows, int new_cols, int new_rows)
565 {
566 /* Need to make room for the logo */
567 struct fbcon_ops *ops = info->fbcon_par;
568 int cnt, erase = vc->vc_video_erase_char, step;
569 unsigned short *save = NULL, *r, *q;
570 int logo_height;
571
572 if (info->flags & FBINFO_MODULE) {
573 logo_shown = FBCON_LOGO_DONTSHOW;
574 return;
575 }
576
577 /*
578 * remove underline attribute from erase character
579 * if black and white framebuffer.
580 */
581 if (fb_get_color_depth(&info->var, &info->fix) == 1)
582 erase &= ~0x400;
583 logo_height = fb_prepare_logo(info, ops->rotate);
584 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
585 q = (unsigned short *) (vc->vc_origin +
586 vc->vc_size_row * rows);
587 step = logo_lines * cols;
588 for (r = q - logo_lines * cols; r < q; r++)
589 if (scr_readw(r) != vc->vc_video_erase_char)
590 break;
591 if (r != q && new_rows >= rows + logo_lines) {
592 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
593 if (save) {
594 int i = cols < new_cols ? cols : new_cols;
595 scr_memsetw(save, erase, logo_lines * new_cols * 2);
596 r = q - step;
597 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
598 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
599 r = q;
600 }
601 }
602 if (r == q) {
603 /* We can scroll screen down */
604 r = q - step - cols;
605 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
606 scr_memcpyw(r + step, r, vc->vc_size_row);
607 r -= cols;
608 }
609 if (!save) {
610 int lines;
611 if (vc->vc_y + logo_lines >= rows)
612 lines = rows - vc->vc_y - 1;
613 else
614 lines = logo_lines;
615 vc->vc_y += lines;
616 vc->vc_pos += lines * vc->vc_size_row;
617 }
618 }
619 scr_memsetw((unsigned short *) vc->vc_origin,
620 erase,
621 vc->vc_size_row * logo_lines);
622
623 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
624 fbcon_clear_margins(vc, 0);
625 update_screen(vc);
626 }
627
628 if (save) {
629 q = (unsigned short *) (vc->vc_origin +
630 vc->vc_size_row *
631 rows);
632 scr_memcpyw(q, save, logo_lines * new_cols * 2);
633 vc->vc_y += logo_lines;
634 vc->vc_pos += logo_lines * vc->vc_size_row;
635 kfree(save);
636 }
637
638 if (logo_lines > vc->vc_bottom) {
639 logo_shown = FBCON_LOGO_CANSHOW;
640 printk(KERN_INFO
641 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
642 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
643 logo_shown = FBCON_LOGO_DRAW;
644 vc->vc_top = logo_lines;
645 }
646 }
647 #endif /* MODULE */
648
649 #ifdef CONFIG_FB_TILEBLITTING
650 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
651 {
652 struct fbcon_ops *ops = info->fbcon_par;
653
654 ops->p = &fb_display[vc->vc_num];
655
656 if ((info->flags & FBINFO_MISC_TILEBLITTING))
657 fbcon_set_tileops(vc, info);
658 else {
659 fbcon_set_rotation(info);
660 fbcon_set_bitops(ops);
661 }
662 }
663
664 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
665 {
666 int err = 0;
667
668 if (info->flags & FBINFO_MISC_TILEBLITTING &&
669 info->tileops->fb_get_tilemax(info) < charcount)
670 err = 1;
671
672 return err;
673 }
674 #else
675 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
676 {
677 struct fbcon_ops *ops = info->fbcon_par;
678
679 info->flags &= ~FBINFO_MISC_TILEBLITTING;
680 ops->p = &fb_display[vc->vc_num];
681 fbcon_set_rotation(info);
682 fbcon_set_bitops(ops);
683 }
684
685 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
686 {
687 return 0;
688 }
689
690 #endif /* CONFIG_MISC_TILEBLITTING */
691
692
693 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
694 int unit, int oldidx)
695 {
696 struct fbcon_ops *ops = NULL;
697 int err = 0;
698
699 if (!try_module_get(info->fbops->owner))
700 err = -ENODEV;
701
702 if (!err && info->fbops->fb_open &&
703 info->fbops->fb_open(info, 0))
704 err = -ENODEV;
705
706 if (!err) {
707 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
708 if (!ops)
709 err = -ENOMEM;
710 }
711
712 if (!err) {
713 info->fbcon_par = ops;
714
715 if (vc)
716 set_blitting_type(vc, info);
717 }
718
719 if (err) {
720 con2fb_map[unit] = oldidx;
721 module_put(info->fbops->owner);
722 }
723
724 return err;
725 }
726
727 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
728 struct fb_info *newinfo, int unit,
729 int oldidx, int found)
730 {
731 struct fbcon_ops *ops = oldinfo->fbcon_par;
732 int err = 0, ret;
733
734 if (oldinfo->fbops->fb_release &&
735 oldinfo->fbops->fb_release(oldinfo, 0)) {
736 con2fb_map[unit] = oldidx;
737 if (!found && newinfo->fbops->fb_release)
738 newinfo->fbops->fb_release(newinfo, 0);
739 if (!found)
740 module_put(newinfo->fbops->owner);
741 err = -ENODEV;
742 }
743
744 if (!err) {
745 fbcon_del_cursor_timer(oldinfo);
746 kfree(ops->cursor_state.mask);
747 kfree(ops->cursor_data);
748 kfree(ops->fontbuffer);
749 kfree(oldinfo->fbcon_par);
750 oldinfo->fbcon_par = NULL;
751 module_put(oldinfo->fbops->owner);
752 /*
753 If oldinfo and newinfo are driving the same hardware,
754 the fb_release() method of oldinfo may attempt to
755 restore the hardware state. This will leave the
756 newinfo in an undefined state. Thus, a call to
757 fb_set_par() may be needed for the newinfo.
758 */
759 if (newinfo->fbops->fb_set_par) {
760 ret = newinfo->fbops->fb_set_par(newinfo);
761
762 if (ret)
763 printk(KERN_ERR "con2fb_release_oldinfo: "
764 "detected unhandled fb_set_par error, "
765 "error code %d\n", ret);
766 }
767 }
768
769 return err;
770 }
771
772 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
773 int unit, int show_logo)
774 {
775 struct fbcon_ops *ops = info->fbcon_par;
776 int ret;
777
778 ops->currcon = fg_console;
779
780 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
781 ret = info->fbops->fb_set_par(info);
782
783 if (ret)
784 printk(KERN_ERR "con2fb_init_display: detected "
785 "unhandled fb_set_par error, "
786 "error code %d\n", ret);
787 }
788
789 ops->flags |= FBCON_FLAGS_INIT;
790 ops->graphics = 0;
791 fbcon_set_disp(info, &info->var, unit);
792
793 if (show_logo) {
794 struct vc_data *fg_vc = vc_cons[fg_console].d;
795 struct fb_info *fg_info =
796 registered_fb[con2fb_map[fg_console]];
797
798 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
799 fg_vc->vc_rows, fg_vc->vc_cols,
800 fg_vc->vc_rows);
801 }
802
803 update_screen(vc_cons[fg_console].d);
804 }
805
806 /**
807 * set_con2fb_map - map console to frame buffer device
808 * @unit: virtual console number to map
809 * @newidx: frame buffer index to map virtual console to
810 * @user: user request
811 *
812 * Maps a virtual console @unit to a frame buffer device
813 * @newidx.
814 */
815 static int set_con2fb_map(int unit, int newidx, int user)
816 {
817 struct vc_data *vc = vc_cons[unit].d;
818 int oldidx = con2fb_map[unit];
819 struct fb_info *info = registered_fb[newidx];
820 struct fb_info *oldinfo = NULL;
821 int found, err = 0;
822
823 if (oldidx == newidx)
824 return 0;
825
826 if (!info || fbcon_has_exited)
827 return -EINVAL;
828
829 if (!err && !search_for_mapped_con()) {
830 info_idx = newidx;
831 return fbcon_takeover(0);
832 }
833
834 if (oldidx != -1)
835 oldinfo = registered_fb[oldidx];
836
837 found = search_fb_in_map(newidx);
838
839 acquire_console_sem();
840 con2fb_map[unit] = newidx;
841 if (!err && !found)
842 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
843
844
845 /*
846 * If old fb is not mapped to any of the consoles,
847 * fbcon should release it.
848 */
849 if (!err && oldinfo && !search_fb_in_map(oldidx))
850 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
851 found);
852
853 if (!err) {
854 int show_logo = (fg_console == 0 && !user &&
855 logo_shown != FBCON_LOGO_DONTSHOW);
856
857 if (!found)
858 fbcon_add_cursor_timer(info);
859 con2fb_map_boot[unit] = newidx;
860 con2fb_init_display(vc, info, unit, show_logo);
861 }
862
863 if (!search_fb_in_map(info_idx))
864 info_idx = newidx;
865
866 release_console_sem();
867 return err;
868 }
869
870 /*
871 * Low Level Operations
872 */
873 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
874 static int var_to_display(struct display *disp,
875 struct fb_var_screeninfo *var,
876 struct fb_info *info)
877 {
878 disp->xres_virtual = var->xres_virtual;
879 disp->yres_virtual = var->yres_virtual;
880 disp->bits_per_pixel = var->bits_per_pixel;
881 disp->grayscale = var->grayscale;
882 disp->nonstd = var->nonstd;
883 disp->accel_flags = var->accel_flags;
884 disp->height = var->height;
885 disp->width = var->width;
886 disp->red = var->red;
887 disp->green = var->green;
888 disp->blue = var->blue;
889 disp->transp = var->transp;
890 disp->rotate = var->rotate;
891 disp->mode = fb_match_mode(var, &info->modelist);
892 if (disp->mode == NULL)
893 /* This should not happen */
894 return -EINVAL;
895 return 0;
896 }
897
898 static void display_to_var(struct fb_var_screeninfo *var,
899 struct display *disp)
900 {
901 fb_videomode_to_var(var, disp->mode);
902 var->xres_virtual = disp->xres_virtual;
903 var->yres_virtual = disp->yres_virtual;
904 var->bits_per_pixel = disp->bits_per_pixel;
905 var->grayscale = disp->grayscale;
906 var->nonstd = disp->nonstd;
907 var->accel_flags = disp->accel_flags;
908 var->height = disp->height;
909 var->width = disp->width;
910 var->red = disp->red;
911 var->green = disp->green;
912 var->blue = disp->blue;
913 var->transp = disp->transp;
914 var->rotate = disp->rotate;
915 }
916
917 static const char *fbcon_startup(void)
918 {
919 const char *display_desc = "frame buffer device";
920 struct display *p = &fb_display[fg_console];
921 struct vc_data *vc = vc_cons[fg_console].d;
922 const struct font_desc *font = NULL;
923 struct module *owner;
924 struct fb_info *info = NULL;
925 struct fbcon_ops *ops;
926 int rows, cols;
927
928 /*
929 * If num_registered_fb is zero, this is a call for the dummy part.
930 * The frame buffer devices weren't initialized yet.
931 */
932 if (!num_registered_fb || info_idx == -1)
933 return display_desc;
934 /*
935 * Instead of blindly using registered_fb[0], we use info_idx, set by
936 * fb_console_init();
937 */
938 info = registered_fb[info_idx];
939 if (!info)
940 return NULL;
941
942 owner = info->fbops->owner;
943 if (!try_module_get(owner))
944 return NULL;
945 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
946 module_put(owner);
947 return NULL;
948 }
949
950 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
951 if (!ops) {
952 module_put(owner);
953 return NULL;
954 }
955
956 ops->currcon = -1;
957 ops->graphics = 1;
958 ops->cur_rotate = -1;
959 info->fbcon_par = ops;
960 p->con_rotate = initial_rotation;
961 set_blitting_type(vc, info);
962
963 if (info->fix.type != FB_TYPE_TEXT) {
964 if (fbcon_softback_size) {
965 if (!softback_buf) {
966 softback_buf =
967 (unsigned long)
968 kmalloc(fbcon_softback_size,
969 GFP_KERNEL);
970 if (!softback_buf) {
971 fbcon_softback_size = 0;
972 softback_top = 0;
973 }
974 }
975 } else {
976 if (softback_buf) {
977 kfree((void *) softback_buf);
978 softback_buf = 0;
979 softback_top = 0;
980 }
981 }
982 if (softback_buf)
983 softback_in = softback_top = softback_curr =
984 softback_buf;
985 softback_lines = 0;
986 }
987
988 /* Setup default font */
989 if (!p->fontdata) {
990 if (!fontname[0] || !(font = find_font(fontname)))
991 font = get_default_font(info->var.xres,
992 info->var.yres,
993 info->pixmap.blit_x,
994 info->pixmap.blit_y);
995 vc->vc_font.width = font->width;
996 vc->vc_font.height = font->height;
997 vc->vc_font.data = (void *)(p->fontdata = font->data);
998 vc->vc_font.charcount = 256;
999 }
1000
1001 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1002 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1003 cols /= vc->vc_font.width;
1004 rows /= vc->vc_font.height;
1005 vc_resize(vc, cols, rows);
1006
1007 DPRINTK("mode: %s\n", info->fix.id);
1008 DPRINTK("visual: %d\n", info->fix.visual);
1009 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1010 info->var.yres,
1011 info->var.bits_per_pixel);
1012
1013 fbcon_add_cursor_timer(info);
1014 fbcon_has_exited = 0;
1015 return display_desc;
1016 }
1017
1018 static void fbcon_init(struct vc_data *vc, int init)
1019 {
1020 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1021 struct fbcon_ops *ops;
1022 struct vc_data **default_mode = vc->vc_display_fg;
1023 struct vc_data *svc = *default_mode;
1024 struct display *t, *p = &fb_display[vc->vc_num];
1025 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1026 int cap, ret;
1027
1028 if (info_idx == -1 || info == NULL)
1029 return;
1030
1031 cap = info->flags;
1032
1033 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1034 (info->fix.type == FB_TYPE_TEXT))
1035 logo = 0;
1036
1037 if (var_to_display(p, &info->var, info))
1038 return;
1039
1040 if (!info->fbcon_par)
1041 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1042
1043 /* If we are not the first console on this
1044 fb, copy the font from that console */
1045 t = &fb_display[fg_console];
1046 if (!p->fontdata) {
1047 if (t->fontdata) {
1048 struct vc_data *fvc = vc_cons[fg_console].d;
1049
1050 vc->vc_font.data = (void *)(p->fontdata =
1051 fvc->vc_font.data);
1052 vc->vc_font.width = fvc->vc_font.width;
1053 vc->vc_font.height = fvc->vc_font.height;
1054 p->userfont = t->userfont;
1055
1056 if (p->userfont)
1057 REFCOUNT(p->fontdata)++;
1058 } else {
1059 const struct font_desc *font = NULL;
1060
1061 if (!fontname[0] || !(font = find_font(fontname)))
1062 font = get_default_font(info->var.xres,
1063 info->var.yres,
1064 info->pixmap.blit_x,
1065 info->pixmap.blit_y);
1066 vc->vc_font.width = font->width;
1067 vc->vc_font.height = font->height;
1068 vc->vc_font.data = (void *)(p->fontdata = font->data);
1069 vc->vc_font.charcount = 256;
1070 }
1071 }
1072
1073 if (p->userfont)
1074 charcnt = FNTCHARCNT(p->fontdata);
1075
1076 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1077 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1078 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1079 if (charcnt == 256) {
1080 vc->vc_hi_font_mask = 0;
1081 } else {
1082 vc->vc_hi_font_mask = 0x100;
1083 if (vc->vc_can_do_color)
1084 vc->vc_complement_mask <<= 1;
1085 }
1086
1087 if (!*svc->vc_uni_pagedir_loc)
1088 con_set_default_unimap(svc);
1089 if (!*vc->vc_uni_pagedir_loc)
1090 con_copy_unimap(vc, svc);
1091
1092 ops = info->fbcon_par;
1093 p->con_rotate = initial_rotation;
1094 set_blitting_type(vc, info);
1095
1096 cols = vc->vc_cols;
1097 rows = vc->vc_rows;
1098 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1099 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1100 new_cols /= vc->vc_font.width;
1101 new_rows /= vc->vc_font.height;
1102
1103 /*
1104 * We must always set the mode. The mode of the previous console
1105 * driver could be in the same resolution but we are using different
1106 * hardware so we have to initialize the hardware.
1107 *
1108 * We need to do it in fbcon_init() to prevent screen corruption.
1109 */
1110 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1111 if (info->fbops->fb_set_par &&
1112 !(ops->flags & FBCON_FLAGS_INIT)) {
1113 ret = info->fbops->fb_set_par(info);
1114
1115 if (ret)
1116 printk(KERN_ERR "fbcon_init: detected "
1117 "unhandled fb_set_par error, "
1118 "error code %d\n", ret);
1119 }
1120
1121 ops->flags |= FBCON_FLAGS_INIT;
1122 }
1123
1124 ops->graphics = 0;
1125
1126 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1127 !(cap & FBINFO_HWACCEL_DISABLED))
1128 p->scrollmode = SCROLL_MOVE;
1129 else /* default to something safe */
1130 p->scrollmode = SCROLL_REDRAW;
1131
1132 /*
1133 * ++guenther: console.c:vc_allocate() relies on initializing
1134 * vc_{cols,rows}, but we must not set those if we are only
1135 * resizing the console.
1136 */
1137 if (init) {
1138 vc->vc_cols = new_cols;
1139 vc->vc_rows = new_rows;
1140 } else
1141 vc_resize(vc, new_cols, new_rows);
1142
1143 if (logo)
1144 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1145
1146 if (vc == svc && softback_buf)
1147 fbcon_update_softback(vc);
1148
1149 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1150 ops->rotate = FB_ROTATE_UR;
1151 set_blitting_type(vc, info);
1152 }
1153
1154 ops->p = &fb_display[fg_console];
1155 }
1156
1157 static void fbcon_free_font(struct display *p)
1158 {
1159 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1160 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1161 p->fontdata = NULL;
1162 p->userfont = 0;
1163 }
1164
1165 static void fbcon_deinit(struct vc_data *vc)
1166 {
1167 struct display *p = &fb_display[vc->vc_num];
1168 struct fb_info *info;
1169 struct fbcon_ops *ops;
1170 int idx;
1171
1172 fbcon_free_font(p);
1173 idx = con2fb_map[vc->vc_num];
1174
1175 if (idx == -1)
1176 goto finished;
1177
1178 info = registered_fb[idx];
1179
1180 if (!info)
1181 goto finished;
1182
1183 ops = info->fbcon_par;
1184
1185 if (!ops)
1186 goto finished;
1187
1188 if (CON_IS_VISIBLE(vc))
1189 fbcon_del_cursor_timer(info);
1190
1191 ops->flags &= ~FBCON_FLAGS_INIT;
1192 finished:
1193
1194 if (!con_is_bound(&fb_con))
1195 fbcon_exit();
1196
1197 return;
1198 }
1199
1200 /* ====================================================================== */
1201
1202 /* fbcon_XXX routines - interface used by the world
1203 *
1204 * This system is now divided into two levels because of complications
1205 * caused by hardware scrolling. Top level functions:
1206 *
1207 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1208 *
1209 * handles y values in range [0, scr_height-1] that correspond to real
1210 * screen positions. y_wrap shift means that first line of bitmap may be
1211 * anywhere on this display. These functions convert lineoffsets to
1212 * bitmap offsets and deal with the wrap-around case by splitting blits.
1213 *
1214 * fbcon_bmove_physical_8() -- These functions fast implementations
1215 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1216 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1217 *
1218 * WARNING:
1219 *
1220 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1221 * Implies should only really hardware scroll in rows. Only reason for
1222 * restriction is simplicity & efficiency at the moment.
1223 */
1224
1225 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1226 int width)
1227 {
1228 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1229 struct fbcon_ops *ops = info->fbcon_par;
1230
1231 struct display *p = &fb_display[vc->vc_num];
1232 u_int y_break;
1233
1234 if (fbcon_is_inactive(vc, info))
1235 return;
1236
1237 if (!height || !width)
1238 return;
1239
1240 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1241 vc->vc_top = 0;
1242
1243 /* Split blits that cross physical y_wrap boundary */
1244
1245 y_break = p->vrows - p->yscroll;
1246 if (sy < y_break && sy + height - 1 >= y_break) {
1247 u_int b = y_break - sy;
1248 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1249 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1250 width);
1251 } else
1252 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1253 }
1254
1255 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1256 int count, int ypos, int xpos)
1257 {
1258 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1259 struct display *p = &fb_display[vc->vc_num];
1260 struct fbcon_ops *ops = info->fbcon_par;
1261
1262 if (!fbcon_is_inactive(vc, info))
1263 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1264 get_color(vc, info, scr_readw(s), 1),
1265 get_color(vc, info, scr_readw(s), 0));
1266 }
1267
1268 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1269 {
1270 unsigned short chr;
1271
1272 scr_writew(c, &chr);
1273 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1274 }
1275
1276 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1277 {
1278 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1279 struct fbcon_ops *ops = info->fbcon_par;
1280
1281 if (!fbcon_is_inactive(vc, info))
1282 ops->clear_margins(vc, info, bottom_only);
1283 }
1284
1285 static void fbcon_cursor(struct vc_data *vc, int mode)
1286 {
1287 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1288 struct fbcon_ops *ops = info->fbcon_par;
1289 int y;
1290 int c = scr_readw((u16 *) vc->vc_pos);
1291
1292 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1293 return;
1294
1295 if (vc->vc_cursor_type & 0x10)
1296 fbcon_del_cursor_timer(info);
1297 else
1298 fbcon_add_cursor_timer(info);
1299
1300 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1301 if (mode & CM_SOFTBACK) {
1302 mode &= ~CM_SOFTBACK;
1303 y = softback_lines;
1304 } else {
1305 if (softback_lines)
1306 fbcon_set_origin(vc);
1307 y = 0;
1308 }
1309
1310 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1311 get_color(vc, info, c, 0));
1312 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1313 }
1314
1315 static int scrollback_phys_max = 0;
1316 static int scrollback_max = 0;
1317 static int scrollback_current = 0;
1318
1319 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1320 int unit)
1321 {
1322 struct display *p, *t;
1323 struct vc_data **default_mode, *vc;
1324 struct vc_data *svc;
1325 struct fbcon_ops *ops = info->fbcon_par;
1326 int rows, cols, charcnt = 256;
1327
1328 p = &fb_display[unit];
1329
1330 if (var_to_display(p, var, info))
1331 return;
1332
1333 vc = vc_cons[unit].d;
1334
1335 if (!vc)
1336 return;
1337
1338 default_mode = vc->vc_display_fg;
1339 svc = *default_mode;
1340 t = &fb_display[svc->vc_num];
1341
1342 if (!vc->vc_font.data) {
1343 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1344 vc->vc_font.width = (*default_mode)->vc_font.width;
1345 vc->vc_font.height = (*default_mode)->vc_font.height;
1346 p->userfont = t->userfont;
1347 if (p->userfont)
1348 REFCOUNT(p->fontdata)++;
1349 }
1350 if (p->userfont)
1351 charcnt = FNTCHARCNT(p->fontdata);
1352
1353 var->activate = FB_ACTIVATE_NOW;
1354 info->var.activate = var->activate;
1355 var->yoffset = info->var.yoffset;
1356 var->xoffset = info->var.xoffset;
1357 fb_set_var(info, var);
1358 ops->var = info->var;
1359 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1360 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1361 if (charcnt == 256) {
1362 vc->vc_hi_font_mask = 0;
1363 } else {
1364 vc->vc_hi_font_mask = 0x100;
1365 if (vc->vc_can_do_color)
1366 vc->vc_complement_mask <<= 1;
1367 }
1368
1369 if (!*svc->vc_uni_pagedir_loc)
1370 con_set_default_unimap(svc);
1371 if (!*vc->vc_uni_pagedir_loc)
1372 con_copy_unimap(vc, svc);
1373
1374 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1375 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1376 cols /= vc->vc_font.width;
1377 rows /= vc->vc_font.height;
1378 vc_resize(vc, cols, rows);
1379
1380 if (CON_IS_VISIBLE(vc)) {
1381 update_screen(vc);
1382 if (softback_buf)
1383 fbcon_update_softback(vc);
1384 }
1385 }
1386
1387 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1388 {
1389 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1390 struct fbcon_ops *ops = info->fbcon_par;
1391 struct display *p = &fb_display[vc->vc_num];
1392
1393 p->yscroll += count;
1394 if (p->yscroll >= p->vrows) /* Deal with wrap */
1395 p->yscroll -= p->vrows;
1396 ops->var.xoffset = 0;
1397 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1398 ops->var.vmode |= FB_VMODE_YWRAP;
1399 ops->update_start(info);
1400 scrollback_max += count;
1401 if (scrollback_max > scrollback_phys_max)
1402 scrollback_max = scrollback_phys_max;
1403 scrollback_current = 0;
1404 }
1405
1406 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1407 {
1408 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1409 struct fbcon_ops *ops = info->fbcon_par;
1410 struct display *p = &fb_display[vc->vc_num];
1411
1412 p->yscroll -= count;
1413 if (p->yscroll < 0) /* Deal with wrap */
1414 p->yscroll += p->vrows;
1415 ops->var.xoffset = 0;
1416 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1417 ops->var.vmode |= FB_VMODE_YWRAP;
1418 ops->update_start(info);
1419 scrollback_max -= count;
1420 if (scrollback_max < 0)
1421 scrollback_max = 0;
1422 scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ypan_up(struct vc_data *vc, int count)
1426 {
1427 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428 struct display *p = &fb_display[vc->vc_num];
1429 struct fbcon_ops *ops = info->fbcon_par;
1430
1431 p->yscroll += count;
1432 if (p->yscroll > p->vrows - vc->vc_rows) {
1433 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1434 0, 0, 0, vc->vc_rows, vc->vc_cols);
1435 p->yscroll -= p->vrows - vc->vc_rows;
1436 }
1437
1438 ops->var.xoffset = 0;
1439 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1440 ops->var.vmode &= ~FB_VMODE_YWRAP;
1441 ops->update_start(info);
1442 fbcon_clear_margins(vc, 1);
1443 scrollback_max += count;
1444 if (scrollback_max > scrollback_phys_max)
1445 scrollback_max = scrollback_phys_max;
1446 scrollback_current = 0;
1447 }
1448
1449 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1450 {
1451 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1452 struct fbcon_ops *ops = info->fbcon_par;
1453 struct display *p = &fb_display[vc->vc_num];
1454
1455 p->yscroll += count;
1456
1457 if (p->yscroll > p->vrows - vc->vc_rows) {
1458 p->yscroll -= p->vrows - vc->vc_rows;
1459 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1460 }
1461
1462 ops->var.xoffset = 0;
1463 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1464 ops->var.vmode &= ~FB_VMODE_YWRAP;
1465 ops->update_start(info);
1466 fbcon_clear_margins(vc, 1);
1467 scrollback_max += count;
1468 if (scrollback_max > scrollback_phys_max)
1469 scrollback_max = scrollback_phys_max;
1470 scrollback_current = 0;
1471 }
1472
1473 static __inline__ void ypan_down(struct vc_data *vc, int count)
1474 {
1475 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1476 struct display *p = &fb_display[vc->vc_num];
1477 struct fbcon_ops *ops = info->fbcon_par;
1478
1479 p->yscroll -= count;
1480 if (p->yscroll < 0) {
1481 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1482 0, vc->vc_rows, vc->vc_cols);
1483 p->yscroll += p->vrows - vc->vc_rows;
1484 }
1485
1486 ops->var.xoffset = 0;
1487 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1488 ops->var.vmode &= ~FB_VMODE_YWRAP;
1489 ops->update_start(info);
1490 fbcon_clear_margins(vc, 1);
1491 scrollback_max -= count;
1492 if (scrollback_max < 0)
1493 scrollback_max = 0;
1494 scrollback_current = 0;
1495 }
1496
1497 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1498 {
1499 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1500 struct fbcon_ops *ops = info->fbcon_par;
1501 struct display *p = &fb_display[vc->vc_num];
1502
1503 p->yscroll -= count;
1504
1505 if (p->yscroll < 0) {
1506 p->yscroll += p->vrows - vc->vc_rows;
1507 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1508 }
1509
1510 ops->var.xoffset = 0;
1511 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1512 ops->var.vmode &= ~FB_VMODE_YWRAP;
1513 ops->update_start(info);
1514 fbcon_clear_margins(vc, 1);
1515 scrollback_max -= count;
1516 if (scrollback_max < 0)
1517 scrollback_max = 0;
1518 scrollback_current = 0;
1519 }
1520
1521 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1522 long delta)
1523 {
1524 int count = vc->vc_rows;
1525 unsigned short *d, *s;
1526 unsigned long n;
1527 int line = 0;
1528
1529 d = (u16 *) softback_curr;
1530 if (d == (u16 *) softback_in)
1531 d = (u16 *) vc->vc_origin;
1532 n = softback_curr + delta * vc->vc_size_row;
1533 softback_lines -= delta;
1534 if (delta < 0) {
1535 if (softback_curr < softback_top && n < softback_buf) {
1536 n += softback_end - softback_buf;
1537 if (n < softback_top) {
1538 softback_lines -=
1539 (softback_top - n) / vc->vc_size_row;
1540 n = softback_top;
1541 }
1542 } else if (softback_curr >= softback_top
1543 && n < softback_top) {
1544 softback_lines -=
1545 (softback_top - n) / vc->vc_size_row;
1546 n = softback_top;
1547 }
1548 } else {
1549 if (softback_curr > softback_in && n >= softback_end) {
1550 n += softback_buf - softback_end;
1551 if (n > softback_in) {
1552 n = softback_in;
1553 softback_lines = 0;
1554 }
1555 } else if (softback_curr <= softback_in && n > softback_in) {
1556 n = softback_in;
1557 softback_lines = 0;
1558 }
1559 }
1560 if (n == softback_curr)
1561 return;
1562 softback_curr = n;
1563 s = (u16 *) softback_curr;
1564 if (s == (u16 *) softback_in)
1565 s = (u16 *) vc->vc_origin;
1566 while (count--) {
1567 unsigned short *start;
1568 unsigned short *le;
1569 unsigned short c;
1570 int x = 0;
1571 unsigned short attr = 1;
1572
1573 start = s;
1574 le = advance_row(s, 1);
1575 do {
1576 c = scr_readw(s);
1577 if (attr != (c & 0xff00)) {
1578 attr = c & 0xff00;
1579 if (s > start) {
1580 fbcon_putcs(vc, start, s - start,
1581 line, x);
1582 x += s - start;
1583 start = s;
1584 }
1585 }
1586 if (c == scr_readw(d)) {
1587 if (s > start) {
1588 fbcon_putcs(vc, start, s - start,
1589 line, x);
1590 x += s - start + 1;
1591 start = s + 1;
1592 } else {
1593 x++;
1594 start++;
1595 }
1596 }
1597 s++;
1598 d++;
1599 } while (s < le);
1600 if (s > start)
1601 fbcon_putcs(vc, start, s - start, line, x);
1602 line++;
1603 if (d == (u16 *) softback_end)
1604 d = (u16 *) softback_buf;
1605 if (d == (u16 *) softback_in)
1606 d = (u16 *) vc->vc_origin;
1607 if (s == (u16 *) softback_end)
1608 s = (u16 *) softback_buf;
1609 if (s == (u16 *) softback_in)
1610 s = (u16 *) vc->vc_origin;
1611 }
1612 }
1613
1614 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1615 int line, int count, int dy)
1616 {
1617 unsigned short *s = (unsigned short *)
1618 (vc->vc_origin + vc->vc_size_row * line);
1619
1620 while (count--) {
1621 unsigned short *start = s;
1622 unsigned short *le = advance_row(s, 1);
1623 unsigned short c;
1624 int x = 0;
1625 unsigned short attr = 1;
1626
1627 do {
1628 c = scr_readw(s);
1629 if (attr != (c & 0xff00)) {
1630 attr = c & 0xff00;
1631 if (s > start) {
1632 fbcon_putcs(vc, start, s - start,
1633 dy, x);
1634 x += s - start;
1635 start = s;
1636 }
1637 }
1638 console_conditional_schedule();
1639 s++;
1640 } while (s < le);
1641 if (s > start)
1642 fbcon_putcs(vc, start, s - start, dy, x);
1643 console_conditional_schedule();
1644 dy++;
1645 }
1646 }
1647
1648 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1649 struct display *p, int line, int count, int ycount)
1650 {
1651 int offset = ycount * vc->vc_cols;
1652 unsigned short *d = (unsigned short *)
1653 (vc->vc_origin + vc->vc_size_row * line);
1654 unsigned short *s = d + offset;
1655 struct fbcon_ops *ops = info->fbcon_par;
1656
1657 while (count--) {
1658 unsigned short *start = s;
1659 unsigned short *le = advance_row(s, 1);
1660 unsigned short c;
1661 int x = 0;
1662
1663 do {
1664 c = scr_readw(s);
1665
1666 if (c == scr_readw(d)) {
1667 if (s > start) {
1668 ops->bmove(vc, info, line + ycount, x,
1669 line, x, 1, s-start);
1670 x += s - start + 1;
1671 start = s + 1;
1672 } else {
1673 x++;
1674 start++;
1675 }
1676 }
1677
1678 scr_writew(c, d);
1679 console_conditional_schedule();
1680 s++;
1681 d++;
1682 } while (s < le);
1683 if (s > start)
1684 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1685 s-start);
1686 console_conditional_schedule();
1687 if (ycount > 0)
1688 line++;
1689 else {
1690 line--;
1691 /* NOTE: We subtract two lines from these pointers */
1692 s -= vc->vc_size_row;
1693 d -= vc->vc_size_row;
1694 }
1695 }
1696 }
1697
1698 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1699 int line, int count, int offset)
1700 {
1701 unsigned short *d = (unsigned short *)
1702 (vc->vc_origin + vc->vc_size_row * line);
1703 unsigned short *s = d + offset;
1704
1705 while (count--) {
1706 unsigned short *start = s;
1707 unsigned short *le = advance_row(s, 1);
1708 unsigned short c;
1709 int x = 0;
1710 unsigned short attr = 1;
1711
1712 do {
1713 c = scr_readw(s);
1714 if (attr != (c & 0xff00)) {
1715 attr = c & 0xff00;
1716 if (s > start) {
1717 fbcon_putcs(vc, start, s - start,
1718 line, x);
1719 x += s - start;
1720 start = s;
1721 }
1722 }
1723 if (c == scr_readw(d)) {
1724 if (s > start) {
1725 fbcon_putcs(vc, start, s - start,
1726 line, x);
1727 x += s - start + 1;
1728 start = s + 1;
1729 } else {
1730 x++;
1731 start++;
1732 }
1733 }
1734 scr_writew(c, d);
1735 console_conditional_schedule();
1736 s++;
1737 d++;
1738 } while (s < le);
1739 if (s > start)
1740 fbcon_putcs(vc, start, s - start, line, x);
1741 console_conditional_schedule();
1742 if (offset > 0)
1743 line++;
1744 else {
1745 line--;
1746 /* NOTE: We subtract two lines from these pointers */
1747 s -= vc->vc_size_row;
1748 d -= vc->vc_size_row;
1749 }
1750 }
1751 }
1752
1753 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1754 int count)
1755 {
1756 unsigned short *p;
1757
1758 if (vc->vc_num != fg_console)
1759 return;
1760 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1761
1762 while (count) {
1763 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1764 count--;
1765 p = advance_row(p, 1);
1766 softback_in += vc->vc_size_row;
1767 if (softback_in == softback_end)
1768 softback_in = softback_buf;
1769 if (softback_in == softback_top) {
1770 softback_top += vc->vc_size_row;
1771 if (softback_top == softback_end)
1772 softback_top = softback_buf;
1773 }
1774 }
1775 softback_curr = softback_in;
1776 }
1777
1778 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1779 int count)
1780 {
1781 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1782 struct display *p = &fb_display[vc->vc_num];
1783 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1784
1785 if (fbcon_is_inactive(vc, info))
1786 return -EINVAL;
1787
1788 fbcon_cursor(vc, CM_ERASE);
1789
1790 /*
1791 * ++Geert: Only use ywrap/ypan if the console is in text mode
1792 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1793 * whole screen (prevents flicker).
1794 */
1795
1796 switch (dir) {
1797 case SM_UP:
1798 if (count > vc->vc_rows) /* Maximum realistic size */
1799 count = vc->vc_rows;
1800 if (softback_top)
1801 fbcon_softback_note(vc, t, count);
1802 if (logo_shown >= 0)
1803 goto redraw_up;
1804 switch (p->scrollmode) {
1805 case SCROLL_MOVE:
1806 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1807 count);
1808 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1809 scr_memsetw((unsigned short *) (vc->vc_origin +
1810 vc->vc_size_row *
1811 (b - count)),
1812 vc->vc_video_erase_char,
1813 vc->vc_size_row * count);
1814 return 1;
1815 break;
1816
1817 case SCROLL_WRAP_MOVE:
1818 if (b - t - count > 3 * vc->vc_rows >> 2) {
1819 if (t > 0)
1820 fbcon_bmove(vc, 0, 0, count, 0, t,
1821 vc->vc_cols);
1822 ywrap_up(vc, count);
1823 if (vc->vc_rows - b > 0)
1824 fbcon_bmove(vc, b - count, 0, b, 0,
1825 vc->vc_rows - b,
1826 vc->vc_cols);
1827 } else if (info->flags & FBINFO_READS_FAST)
1828 fbcon_bmove(vc, t + count, 0, t, 0,
1829 b - t - count, vc->vc_cols);
1830 else
1831 goto redraw_up;
1832 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1833 break;
1834
1835 case SCROLL_PAN_REDRAW:
1836 if ((p->yscroll + count <=
1837 2 * (p->vrows - vc->vc_rows))
1838 && ((!scroll_partial && (b - t == vc->vc_rows))
1839 || (scroll_partial
1840 && (b - t - count >
1841 3 * vc->vc_rows >> 2)))) {
1842 if (t > 0)
1843 fbcon_redraw_move(vc, p, 0, t, count);
1844 ypan_up_redraw(vc, t, count);
1845 if (vc->vc_rows - b > 0)
1846 fbcon_redraw_move(vc, p, b,
1847 vc->vc_rows - b, b);
1848 } else
1849 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1850 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1851 break;
1852
1853 case SCROLL_PAN_MOVE:
1854 if ((p->yscroll + count <=
1855 2 * (p->vrows - vc->vc_rows))
1856 && ((!scroll_partial && (b - t == vc->vc_rows))
1857 || (scroll_partial
1858 && (b - t - count >
1859 3 * vc->vc_rows >> 2)))) {
1860 if (t > 0)
1861 fbcon_bmove(vc, 0, 0, count, 0, t,
1862 vc->vc_cols);
1863 ypan_up(vc, count);
1864 if (vc->vc_rows - b > 0)
1865 fbcon_bmove(vc, b - count, 0, b, 0,
1866 vc->vc_rows - b,
1867 vc->vc_cols);
1868 } else if (info->flags & FBINFO_READS_FAST)
1869 fbcon_bmove(vc, t + count, 0, t, 0,
1870 b - t - count, vc->vc_cols);
1871 else
1872 goto redraw_up;
1873 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1874 break;
1875
1876 case SCROLL_REDRAW:
1877 redraw_up:
1878 fbcon_redraw(vc, p, t, b - t - count,
1879 count * vc->vc_cols);
1880 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1881 scr_memsetw((unsigned short *) (vc->vc_origin +
1882 vc->vc_size_row *
1883 (b - count)),
1884 vc->vc_video_erase_char,
1885 vc->vc_size_row * count);
1886 return 1;
1887 }
1888 break;
1889
1890 case SM_DOWN:
1891 if (count > vc->vc_rows) /* Maximum realistic size */
1892 count = vc->vc_rows;
1893 if (logo_shown >= 0)
1894 goto redraw_down;
1895 switch (p->scrollmode) {
1896 case SCROLL_MOVE:
1897 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1898 -count);
1899 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1900 scr_memsetw((unsigned short *) (vc->vc_origin +
1901 vc->vc_size_row *
1902 t),
1903 vc->vc_video_erase_char,
1904 vc->vc_size_row * count);
1905 return 1;
1906 break;
1907
1908 case SCROLL_WRAP_MOVE:
1909 if (b - t - count > 3 * vc->vc_rows >> 2) {
1910 if (vc->vc_rows - b > 0)
1911 fbcon_bmove(vc, b, 0, b - count, 0,
1912 vc->vc_rows - b,
1913 vc->vc_cols);
1914 ywrap_down(vc, count);
1915 if (t > 0)
1916 fbcon_bmove(vc, count, 0, 0, 0, t,
1917 vc->vc_cols);
1918 } else if (info->flags & FBINFO_READS_FAST)
1919 fbcon_bmove(vc, t, 0, t + count, 0,
1920 b - t - count, vc->vc_cols);
1921 else
1922 goto redraw_down;
1923 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1924 break;
1925
1926 case SCROLL_PAN_MOVE:
1927 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1928 && ((!scroll_partial && (b - t == vc->vc_rows))
1929 || (scroll_partial
1930 && (b - t - count >
1931 3 * vc->vc_rows >> 2)))) {
1932 if (vc->vc_rows - b > 0)
1933 fbcon_bmove(vc, b, 0, b - count, 0,
1934 vc->vc_rows - b,
1935 vc->vc_cols);
1936 ypan_down(vc, count);
1937 if (t > 0)
1938 fbcon_bmove(vc, count, 0, 0, 0, t,
1939 vc->vc_cols);
1940 } else if (info->flags & FBINFO_READS_FAST)
1941 fbcon_bmove(vc, t, 0, t + count, 0,
1942 b - t - count, vc->vc_cols);
1943 else
1944 goto redraw_down;
1945 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1946 break;
1947
1948 case SCROLL_PAN_REDRAW:
1949 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1950 && ((!scroll_partial && (b - t == vc->vc_rows))
1951 || (scroll_partial
1952 && (b - t - count >
1953 3 * vc->vc_rows >> 2)))) {
1954 if (vc->vc_rows - b > 0)
1955 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1956 b - count);
1957 ypan_down_redraw(vc, t, count);
1958 if (t > 0)
1959 fbcon_redraw_move(vc, p, count, t, 0);
1960 } else
1961 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1962 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1963 break;
1964
1965 case SCROLL_REDRAW:
1966 redraw_down:
1967 fbcon_redraw(vc, p, b - 1, b - t - count,
1968 -count * vc->vc_cols);
1969 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1970 scr_memsetw((unsigned short *) (vc->vc_origin +
1971 vc->vc_size_row *
1972 t),
1973 vc->vc_video_erase_char,
1974 vc->vc_size_row * count);
1975 return 1;
1976 }
1977 }
1978 return 0;
1979 }
1980
1981
1982 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1983 int height, int width)
1984 {
1985 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1986 struct display *p = &fb_display[vc->vc_num];
1987
1988 if (fbcon_is_inactive(vc, info))
1989 return;
1990
1991 if (!width || !height)
1992 return;
1993
1994 /* Split blits that cross physical y_wrap case.
1995 * Pathological case involves 4 blits, better to use recursive
1996 * code rather than unrolled case
1997 *
1998 * Recursive invocations don't need to erase the cursor over and
1999 * over again, so we use fbcon_bmove_rec()
2000 */
2001 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2002 p->vrows - p->yscroll);
2003 }
2004
2005 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2006 int dy, int dx, int height, int width, u_int y_break)
2007 {
2008 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2009 struct fbcon_ops *ops = info->fbcon_par;
2010 u_int b;
2011
2012 if (sy < y_break && sy + height > y_break) {
2013 b = y_break - sy;
2014 if (dy < sy) { /* Avoid trashing self */
2015 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2016 y_break);
2017 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2018 height - b, width, y_break);
2019 } else {
2020 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2021 height - b, width, y_break);
2022 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2023 y_break);
2024 }
2025 return;
2026 }
2027
2028 if (dy < y_break && dy + height > y_break) {
2029 b = y_break - dy;
2030 if (dy < sy) { /* Avoid trashing self */
2031 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2032 y_break);
2033 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2034 height - b, width, y_break);
2035 } else {
2036 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2037 height - b, width, y_break);
2038 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2039 y_break);
2040 }
2041 return;
2042 }
2043 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2044 height, width);
2045 }
2046
2047 static void updatescrollmode(struct display *p,
2048 struct fb_info *info,
2049 struct vc_data *vc)
2050 {
2051 struct fbcon_ops *ops = info->fbcon_par;
2052 int fh = vc->vc_font.height;
2053 int cap = info->flags;
2054 u16 t = 0;
2055 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2056 info->fix.xpanstep);
2057 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2058 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2059 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2060 info->var.xres_virtual);
2061 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2062 divides(ypan, vc->vc_font.height) && vyres > yres;
2063 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2064 divides(ywrap, vc->vc_font.height) &&
2065 divides(vc->vc_font.height, vyres) &&
2066 divides(vc->vc_font.height, yres);
2067 int reading_fast = cap & FBINFO_READS_FAST;
2068 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2069 !(cap & FBINFO_HWACCEL_DISABLED);
2070 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2071 !(cap & FBINFO_HWACCEL_DISABLED);
2072
2073 p->vrows = vyres/fh;
2074 if (yres > (fh * (vc->vc_rows + 1)))
2075 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2076 if ((yres % fh) && (vyres % fh < yres % fh))
2077 p->vrows--;
2078
2079 if (good_wrap || good_pan) {
2080 if (reading_fast || fast_copyarea)
2081 p->scrollmode = good_wrap ?
2082 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2083 else
2084 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2085 SCROLL_PAN_REDRAW;
2086 } else {
2087 if (reading_fast || (fast_copyarea && !fast_imageblit))
2088 p->scrollmode = SCROLL_MOVE;
2089 else
2090 p->scrollmode = SCROLL_REDRAW;
2091 }
2092 }
2093
2094 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2095 unsigned int height, unsigned int user)
2096 {
2097 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2098 struct fbcon_ops *ops = info->fbcon_par;
2099 struct display *p = &fb_display[vc->vc_num];
2100 struct fb_var_screeninfo var = info->var;
2101 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2102
2103 virt_w = FBCON_SWAP(ops->rotate, width, height);
2104 virt_h = FBCON_SWAP(ops->rotate, height, width);
2105 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2106 vc->vc_font.height);
2107 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2108 vc->vc_font.width);
2109 var.xres = virt_w * virt_fw;
2110 var.yres = virt_h * virt_fh;
2111 x_diff = info->var.xres - var.xres;
2112 y_diff = info->var.yres - var.yres;
2113 if (x_diff < 0 || x_diff > virt_fw ||
2114 y_diff < 0 || y_diff > virt_fh) {
2115 const struct fb_videomode *mode;
2116
2117 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2118 mode = fb_find_best_mode(&var, &info->modelist);
2119 if (mode == NULL)
2120 return -EINVAL;
2121 display_to_var(&var, p);
2122 fb_videomode_to_var(&var, mode);
2123
2124 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2125 return -EINVAL;
2126
2127 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2128 if (CON_IS_VISIBLE(vc)) {
2129 var.activate = FB_ACTIVATE_NOW |
2130 FB_ACTIVATE_FORCE;
2131 fb_set_var(info, &var);
2132 }
2133 var_to_display(p, &info->var, info);
2134 ops->var = info->var;
2135 }
2136 updatescrollmode(p, info, vc);
2137 return 0;
2138 }
2139
2140 static int fbcon_switch(struct vc_data *vc)
2141 {
2142 struct fb_info *info, *old_info = NULL;
2143 struct fbcon_ops *ops;
2144 struct display *p = &fb_display[vc->vc_num];
2145 struct fb_var_screeninfo var;
2146 int i, ret, prev_console, charcnt = 256;
2147
2148 info = registered_fb[con2fb_map[vc->vc_num]];
2149 ops = info->fbcon_par;
2150
2151 if (softback_top) {
2152 if (softback_lines)
2153 fbcon_set_origin(vc);
2154 softback_top = softback_curr = softback_in = softback_buf;
2155 softback_lines = 0;
2156 fbcon_update_softback(vc);
2157 }
2158
2159 if (logo_shown >= 0) {
2160 struct vc_data *conp2 = vc_cons[logo_shown].d;
2161
2162 if (conp2->vc_top == logo_lines
2163 && conp2->vc_bottom == conp2->vc_rows)
2164 conp2->vc_top = 0;
2165 logo_shown = FBCON_LOGO_CANSHOW;
2166 }
2167
2168 prev_console = ops->currcon;
2169 if (prev_console != -1)
2170 old_info = registered_fb[con2fb_map[prev_console]];
2171 for (i = 0; i < FB_MAX; i++) {
2172 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2173 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2174
2175 o->currcon = vc->vc_num;
2176 }
2177 }
2178 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2179 display_to_var(&var, p);
2180 var.activate = FB_ACTIVATE_NOW;
2181
2182 /*
2183 * make sure we don't unnecessarily trip the memcmp()
2184 * in fb_set_var()
2185 */
2186 info->var.activate = var.activate;
2187 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2188 fb_set_var(info, &var);
2189 ops->var = info->var;
2190
2191 if (old_info != NULL && (old_info != info ||
2192 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2193 if (info->fbops->fb_set_par) {
2194 ret = info->fbops->fb_set_par(info);
2195
2196 if (ret)
2197 printk(KERN_ERR "fbcon_switch: detected "
2198 "unhandled fb_set_par error, "
2199 "error code %d\n", ret);
2200 }
2201
2202 if (old_info != info)
2203 fbcon_del_cursor_timer(old_info);
2204 }
2205
2206 if (fbcon_is_inactive(vc, info) ||
2207 ops->blank_state != FB_BLANK_UNBLANK)
2208 fbcon_del_cursor_timer(info);
2209 else
2210 fbcon_add_cursor_timer(info);
2211
2212 set_blitting_type(vc, info);
2213 ops->cursor_reset = 1;
2214
2215 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2216 ops->rotate = FB_ROTATE_UR;
2217 set_blitting_type(vc, info);
2218 }
2219
2220 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2221 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2222
2223 if (p->userfont)
2224 charcnt = FNTCHARCNT(vc->vc_font.data);
2225
2226 if (charcnt > 256)
2227 vc->vc_complement_mask <<= 1;
2228
2229 updatescrollmode(p, info, vc);
2230
2231 switch (p->scrollmode) {
2232 case SCROLL_WRAP_MOVE:
2233 scrollback_phys_max = p->vrows - vc->vc_rows;
2234 break;
2235 case SCROLL_PAN_MOVE:
2236 case SCROLL_PAN_REDRAW:
2237 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2238 if (scrollback_phys_max < 0)
2239 scrollback_phys_max = 0;
2240 break;
2241 default:
2242 scrollback_phys_max = 0;
2243 break;
2244 }
2245
2246 scrollback_max = 0;
2247 scrollback_current = 0;
2248
2249 if (!fbcon_is_inactive(vc, info)) {
2250 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2251 ops->update_start(info);
2252 }
2253
2254 fbcon_set_palette(vc, color_table);
2255 fbcon_clear_margins(vc, 0);
2256
2257 if (logo_shown == FBCON_LOGO_DRAW) {
2258
2259 logo_shown = fg_console;
2260 /* This is protected above by initmem_freed */
2261 fb_show_logo(info, ops->rotate);
2262 update_region(vc,
2263 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2264 vc->vc_size_row * (vc->vc_bottom -
2265 vc->vc_top) / 2);
2266 return 0;
2267 }
2268 return 1;
2269 }
2270
2271 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2272 int blank)
2273 {
2274 struct fb_event event;
2275
2276 if (blank) {
2277 unsigned short charmask = vc->vc_hi_font_mask ?
2278 0x1ff : 0xff;
2279 unsigned short oldc;
2280
2281 oldc = vc->vc_video_erase_char;
2282 vc->vc_video_erase_char &= charmask;
2283 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2284 vc->vc_video_erase_char = oldc;
2285 }
2286
2287
2288 if (!lock_fb_info(info))
2289 return;
2290 event.info = info;
2291 event.data = &blank;
2292 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2293 unlock_fb_info(info);
2294 }
2295
2296 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2297 {
2298 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2299 struct fbcon_ops *ops = info->fbcon_par;
2300
2301 if (mode_switch) {
2302 struct fb_var_screeninfo var = info->var;
2303
2304 ops->graphics = 1;
2305
2306 if (!blank) {
2307 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2308 fb_set_var(info, &var);
2309 ops->graphics = 0;
2310 ops->var = info->var;
2311 }
2312 }
2313
2314 if (!fbcon_is_inactive(vc, info)) {
2315 if (ops->blank_state != blank) {
2316 ops->blank_state = blank;
2317 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2318 ops->cursor_flash = (!blank);
2319
2320 if (!(info->flags & FBINFO_MISC_USEREVENT))
2321 if (fb_blank(info, blank))
2322 fbcon_generic_blank(vc, info, blank);
2323 }
2324
2325 if (!blank)
2326 update_screen(vc);
2327 }
2328
2329 if (mode_switch || fbcon_is_inactive(vc, info) ||
2330 ops->blank_state != FB_BLANK_UNBLANK)
2331 fbcon_del_cursor_timer(info);
2332 else
2333 fbcon_add_cursor_timer(info);
2334
2335 return 0;
2336 }
2337
2338 static int fbcon_debug_enter(struct vc_data *vc)
2339 {
2340 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2341 struct fbcon_ops *ops = info->fbcon_par;
2342
2343 ops->save_graphics = ops->graphics;
2344 ops->graphics = 0;
2345 if (info->fbops->fb_debug_enter)
2346 info->fbops->fb_debug_enter(info);
2347 fbcon_set_palette(vc, color_table);
2348 return 0;
2349 }
2350
2351 static int fbcon_debug_leave(struct vc_data *vc)
2352 {
2353 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2354 struct fbcon_ops *ops = info->fbcon_par;
2355
2356 ops->graphics = ops->save_graphics;
2357 if (info->fbops->fb_debug_leave)
2358 info->fbops->fb_debug_leave(info);
2359 return 0;
2360 }
2361
2362 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2363 {
2364 u8 *fontdata = vc->vc_font.data;
2365 u8 *data = font->data;
2366 int i, j;
2367
2368 font->width = vc->vc_font.width;
2369 font->height = vc->vc_font.height;
2370 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2371 if (!font->data)
2372 return 0;
2373
2374 if (font->width <= 8) {
2375 j = vc->vc_font.height;
2376 for (i = 0; i < font->charcount; i++) {
2377 memcpy(data, fontdata, j);
2378 memset(data + j, 0, 32 - j);
2379 data += 32;
2380 fontdata += j;
2381 }
2382 } else if (font->width <= 16) {
2383 j = vc->vc_font.height * 2;
2384 for (i = 0; i < font->charcount; i++) {
2385 memcpy(data, fontdata, j);
2386 memset(data + j, 0, 64 - j);
2387 data += 64;
2388 fontdata += j;
2389 }
2390 } else if (font->width <= 24) {
2391 for (i = 0; i < font->charcount; i++) {
2392 for (j = 0; j < vc->vc_font.height; j++) {
2393 *data++ = fontdata[0];
2394 *data++ = fontdata[1];
2395 *data++ = fontdata[2];
2396 fontdata += sizeof(u32);
2397 }
2398 memset(data, 0, 3 * (32 - j));
2399 data += 3 * (32 - j);
2400 }
2401 } else {
2402 j = vc->vc_font.height * 4;
2403 for (i = 0; i < font->charcount; i++) {
2404 memcpy(data, fontdata, j);
2405 memset(data + j, 0, 128 - j);
2406 data += 128;
2407 fontdata += j;
2408 }
2409 }
2410 return 0;
2411 }
2412
2413 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2414 const u8 * data, int userfont)
2415 {
2416 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2417 struct fbcon_ops *ops = info->fbcon_par;
2418 struct display *p = &fb_display[vc->vc_num];
2419 int resize;
2420 int cnt;
2421 char *old_data = NULL;
2422
2423 if (CON_IS_VISIBLE(vc) && softback_lines)
2424 fbcon_set_origin(vc);
2425
2426 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2427 if (p->userfont)
2428 old_data = vc->vc_font.data;
2429 if (userfont)
2430 cnt = FNTCHARCNT(data);
2431 else
2432 cnt = 256;
2433 vc->vc_font.data = (void *)(p->fontdata = data);
2434 if ((p->userfont = userfont))
2435 REFCOUNT(data)++;
2436 vc->vc_font.width = w;
2437 vc->vc_font.height = h;
2438 if (vc->vc_hi_font_mask && cnt == 256) {
2439 vc->vc_hi_font_mask = 0;
2440 if (vc->vc_can_do_color) {
2441 vc->vc_complement_mask >>= 1;
2442 vc->vc_s_complement_mask >>= 1;
2443 }
2444
2445 /* ++Edmund: reorder the attribute bits */
2446 if (vc->vc_can_do_color) {
2447 unsigned short *cp =
2448 (unsigned short *) vc->vc_origin;
2449 int count = vc->vc_screenbuf_size / 2;
2450 unsigned short c;
2451 for (; count > 0; count--, cp++) {
2452 c = scr_readw(cp);
2453 scr_writew(((c & 0xfe00) >> 1) |
2454 (c & 0xff), cp);
2455 }
2456 c = vc->vc_video_erase_char;
2457 vc->vc_video_erase_char =
2458 ((c & 0xfe00) >> 1) | (c & 0xff);
2459 vc->vc_attr >>= 1;
2460 }
2461 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2462 vc->vc_hi_font_mask = 0x100;
2463 if (vc->vc_can_do_color) {
2464 vc->vc_complement_mask <<= 1;
2465 vc->vc_s_complement_mask <<= 1;
2466 }
2467
2468 /* ++Edmund: reorder the attribute bits */
2469 {
2470 unsigned short *cp =
2471 (unsigned short *) vc->vc_origin;
2472 int count = vc->vc_screenbuf_size / 2;
2473 unsigned short c;
2474 for (; count > 0; count--, cp++) {
2475 unsigned short newc;
2476 c = scr_readw(cp);
2477 if (vc->vc_can_do_color)
2478 newc =
2479 ((c & 0xff00) << 1) | (c &
2480 0xff);
2481 else
2482 newc = c & ~0x100;
2483 scr_writew(newc, cp);
2484 }
2485 c = vc->vc_video_erase_char;
2486 if (vc->vc_can_do_color) {
2487 vc->vc_video_erase_char =
2488 ((c & 0xff00) << 1) | (c & 0xff);
2489 vc->vc_attr <<= 1;
2490 } else
2491 vc->vc_video_erase_char = c & ~0x100;
2492 }
2493
2494 }
2495
2496 if (resize) {
2497 int cols, rows;
2498
2499 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2500 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2501 cols /= w;
2502 rows /= h;
2503 vc_resize(vc, cols, rows);
2504 if (CON_IS_VISIBLE(vc) && softback_buf)
2505 fbcon_update_softback(vc);
2506 } else if (CON_IS_VISIBLE(vc)
2507 && vc->vc_mode == KD_TEXT) {
2508 fbcon_clear_margins(vc, 0);
2509 update_screen(vc);
2510 }
2511
2512 if (old_data && (--REFCOUNT(old_data) == 0))
2513 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2514 return 0;
2515 }
2516
2517 static int fbcon_copy_font(struct vc_data *vc, int con)
2518 {
2519 struct display *od = &fb_display[con];
2520 struct console_font *f = &vc->vc_font;
2521
2522 if (od->fontdata == f->data)
2523 return 0; /* already the same font... */
2524 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2525 }
2526
2527 /*
2528 * User asked to set font; we are guaranteed that
2529 * a) width and height are in range 1..32
2530 * b) charcount does not exceed 512
2531 * but lets not assume that, since someone might someday want to use larger
2532 * fonts. And charcount of 512 is small for unicode support.
2533 *
2534 * However, user space gives the font in 32 rows , regardless of
2535 * actual font height. So a new API is needed if support for larger fonts
2536 * is ever implemented.
2537 */
2538
2539 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2540 {
2541 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2542 unsigned charcount = font->charcount;
2543 int w = font->width;
2544 int h = font->height;
2545 int size;
2546 int i, csum;
2547 u8 *new_data, *data = font->data;
2548 int pitch = (font->width+7) >> 3;
2549
2550 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2551 * If not this check should be changed to charcount < 256 */
2552 if (charcount != 256 && charcount != 512)
2553 return -EINVAL;
2554
2555 /* Make sure drawing engine can handle the font */
2556 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2557 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2558 return -EINVAL;
2559
2560 /* Make sure driver can handle the font length */
2561 if (fbcon_invalid_charcount(info, charcount))
2562 return -EINVAL;
2563
2564 size = h * pitch * charcount;
2565
2566 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2567
2568 if (!new_data)
2569 return -ENOMEM;
2570
2571 new_data += FONT_EXTRA_WORDS * sizeof(int);
2572 FNTSIZE(new_data) = size;
2573 FNTCHARCNT(new_data) = charcount;
2574 REFCOUNT(new_data) = 0; /* usage counter */
2575 for (i=0; i< charcount; i++) {
2576 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2577 }
2578
2579 /* Since linux has a nice crc32 function use it for counting font
2580 * checksums. */
2581 csum = crc32(0, new_data, size);
2582
2583 FNTSUM(new_data) = csum;
2584 /* Check if the same font is on some other console already */
2585 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2586 struct vc_data *tmp = vc_cons[i].d;
2587
2588 if (fb_display[i].userfont &&
2589 fb_display[i].fontdata &&
2590 FNTSUM(fb_display[i].fontdata) == csum &&
2591 FNTSIZE(fb_display[i].fontdata) == size &&
2592 tmp->vc_font.width == w &&
2593 !memcmp(fb_display[i].fontdata, new_data, size)) {
2594 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2595 new_data = (u8 *)fb_display[i].fontdata;
2596 break;
2597 }
2598 }
2599 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2600 }
2601
2602 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2603 {
2604 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2605 const struct font_desc *f;
2606
2607 if (!name)
2608 f = get_default_font(info->var.xres, info->var.yres,
2609 info->pixmap.blit_x, info->pixmap.blit_y);
2610 else if (!(f = find_font(name)))
2611 return -ENOENT;
2612
2613 font->width = f->width;
2614 font->height = f->height;
2615 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2616 }
2617
2618 static u16 palette_red[16];
2619 static u16 palette_green[16];
2620 static u16 palette_blue[16];
2621
2622 static struct fb_cmap palette_cmap = {
2623 0, 16, palette_red, palette_green, palette_blue, NULL
2624 };
2625
2626 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2627 {
2628 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2629 int i, j, k, depth;
2630 u8 val;
2631
2632 if (fbcon_is_inactive(vc, info))
2633 return -EINVAL;
2634
2635 if (!CON_IS_VISIBLE(vc))
2636 return 0;
2637
2638 depth = fb_get_color_depth(&info->var, &info->fix);
2639 if (depth > 3) {
2640 for (i = j = 0; i < 16; i++) {
2641 k = table[i];
2642 val = vc->vc_palette[j++];
2643 palette_red[k] = (val << 8) | val;
2644 val = vc->vc_palette[j++];
2645 palette_green[k] = (val << 8) | val;
2646 val = vc->vc_palette[j++];
2647 palette_blue[k] = (val << 8) | val;
2648 }
2649 palette_cmap.len = 16;
2650 palette_cmap.start = 0;
2651 /*
2652 * If framebuffer is capable of less than 16 colors,
2653 * use default palette of fbcon.
2654 */
2655 } else
2656 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2657
2658 return fb_set_cmap(&palette_cmap, info);
2659 }
2660
2661 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2662 {
2663 unsigned long p;
2664 int line;
2665
2666 if (vc->vc_num != fg_console || !softback_lines)
2667 return (u16 *) (vc->vc_origin + offset);
2668 line = offset / vc->vc_size_row;
2669 if (line >= softback_lines)
2670 return (u16 *) (vc->vc_origin + offset -
2671 softback_lines * vc->vc_size_row);
2672 p = softback_curr + offset;
2673 if (p >= softback_end)
2674 p += softback_buf - softback_end;
2675 return (u16 *) p;
2676 }
2677
2678 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2679 int *px, int *py)
2680 {
2681 unsigned long ret;
2682 int x, y;
2683
2684 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2685 unsigned long offset = (pos - vc->vc_origin) / 2;
2686
2687 x = offset % vc->vc_cols;
2688 y = offset / vc->vc_cols;
2689 if (vc->vc_num == fg_console)
2690 y += softback_lines;
2691 ret = pos + (vc->vc_cols - x) * 2;
2692 } else if (vc->vc_num == fg_console && softback_lines) {
2693 unsigned long offset = pos - softback_curr;
2694
2695 if (pos < softback_curr)
2696 offset += softback_end - softback_buf;
2697 offset /= 2;
2698 x = offset % vc->vc_cols;
2699 y = offset / vc->vc_cols;
2700 ret = pos + (vc->vc_cols - x) * 2;
2701 if (ret == softback_end)
2702 ret = softback_buf;
2703 if (ret == softback_in)
2704 ret = vc->vc_origin;
2705 } else {
2706 /* Should not happen */
2707 x = y = 0;
2708 ret = vc->vc_origin;
2709 }
2710 if (px)
2711 *px = x;
2712 if (py)
2713 *py = y;
2714 return ret;
2715 }
2716
2717 /* As we might be inside of softback, we may work with non-contiguous buffer,
2718 that's why we have to use a separate routine. */
2719 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2720 {
2721 while (cnt--) {
2722 u16 a = scr_readw(p);
2723 if (!vc->vc_can_do_color)
2724 a ^= 0x0800;
2725 else if (vc->vc_hi_font_mask == 0x100)
2726 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2727 (((a) & 0x0e00) << 4);
2728 else
2729 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2730 (((a) & 0x0700) << 4);
2731 scr_writew(a, p++);
2732 if (p == (u16 *) softback_end)
2733 p = (u16 *) softback_buf;
2734 if (p == (u16 *) softback_in)
2735 p = (u16 *) vc->vc_origin;
2736 }
2737 }
2738
2739 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2740 {
2741 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2742 struct fbcon_ops *ops = info->fbcon_par;
2743 struct display *disp = &fb_display[fg_console];
2744 int offset, limit, scrollback_old;
2745
2746 if (softback_top) {
2747 if (vc->vc_num != fg_console)
2748 return 0;
2749 if (vc->vc_mode != KD_TEXT || !lines)
2750 return 0;
2751 if (logo_shown >= 0) {
2752 struct vc_data *conp2 = vc_cons[logo_shown].d;
2753
2754 if (conp2->vc_top == logo_lines
2755 && conp2->vc_bottom == conp2->vc_rows)
2756 conp2->vc_top = 0;
2757 if (logo_shown == vc->vc_num) {
2758 unsigned long p, q;
2759 int i;
2760
2761 p = softback_in;
2762 q = vc->vc_origin +
2763 logo_lines * vc->vc_size_row;
2764 for (i = 0; i < logo_lines; i++) {
2765 if (p == softback_top)
2766 break;
2767 if (p == softback_buf)
2768 p = softback_end;
2769 p -= vc->vc_size_row;
2770 q -= vc->vc_size_row;
2771 scr_memcpyw((u16 *) q, (u16 *) p,
2772 vc->vc_size_row);
2773 }
2774 softback_in = softback_curr = p;
2775 update_region(vc, vc->vc_origin,
2776 logo_lines * vc->vc_cols);
2777 }
2778 logo_shown = FBCON_LOGO_CANSHOW;
2779 }
2780 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2781 fbcon_redraw_softback(vc, disp, lines);
2782 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2783 return 0;
2784 }
2785
2786 if (!scrollback_phys_max)
2787 return -ENOSYS;
2788
2789 scrollback_old = scrollback_current;
2790 scrollback_current -= lines;
2791 if (scrollback_current < 0)
2792 scrollback_current = 0;
2793 else if (scrollback_current > scrollback_max)
2794 scrollback_current = scrollback_max;
2795 if (scrollback_current == scrollback_old)
2796 return 0;
2797
2798 if (fbcon_is_inactive(vc, info))
2799 return 0;
2800
2801 fbcon_cursor(vc, CM_ERASE);
2802
2803 offset = disp->yscroll - scrollback_current;
2804 limit = disp->vrows;
2805 switch (disp->scrollmode) {
2806 case SCROLL_WRAP_MOVE:
2807 info->var.vmode |= FB_VMODE_YWRAP;
2808 break;
2809 case SCROLL_PAN_MOVE:
2810 case SCROLL_PAN_REDRAW:
2811 limit -= vc->vc_rows;
2812 info->var.vmode &= ~FB_VMODE_YWRAP;
2813 break;
2814 }
2815 if (offset < 0)
2816 offset += limit;
2817 else if (offset >= limit)
2818 offset -= limit;
2819
2820 ops->var.xoffset = 0;
2821 ops->var.yoffset = offset * vc->vc_font.height;
2822 ops->update_start(info);
2823
2824 if (!scrollback_current)
2825 fbcon_cursor(vc, CM_DRAW);
2826 return 0;
2827 }
2828
2829 static int fbcon_set_origin(struct vc_data *vc)
2830 {
2831 if (softback_lines)
2832 fbcon_scrolldelta(vc, softback_lines);
2833 return 0;
2834 }
2835
2836 static void fbcon_suspended(struct fb_info *info)
2837 {
2838 struct vc_data *vc = NULL;
2839 struct fbcon_ops *ops = info->fbcon_par;
2840
2841 if (!ops || ops->currcon < 0)
2842 return;
2843 vc = vc_cons[ops->currcon].d;
2844
2845 /* Clear cursor, restore saved data */
2846 fbcon_cursor(vc, CM_ERASE);
2847 }
2848
2849 static void fbcon_resumed(struct fb_info *info)
2850 {
2851 struct vc_data *vc;
2852 struct fbcon_ops *ops = info->fbcon_par;
2853
2854 if (!ops || ops->currcon < 0)
2855 return;
2856 vc = vc_cons[ops->currcon].d;
2857
2858 update_screen(vc);
2859 }
2860
2861 static void fbcon_modechanged(struct fb_info *info)
2862 {
2863 struct fbcon_ops *ops = info->fbcon_par;
2864 struct vc_data *vc;
2865 struct display *p;
2866 int rows, cols;
2867
2868 if (!ops || ops->currcon < 0)
2869 return;
2870 vc = vc_cons[ops->currcon].d;
2871 if (vc->vc_mode != KD_TEXT ||
2872 registered_fb[con2fb_map[ops->currcon]] != info)
2873 return;
2874
2875 p = &fb_display[vc->vc_num];
2876 set_blitting_type(vc, info);
2877
2878 if (CON_IS_VISIBLE(vc)) {
2879 var_to_display(p, &info->var, info);
2880 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2881 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2882 cols /= vc->vc_font.width;
2883 rows /= vc->vc_font.height;
2884 vc_resize(vc, cols, rows);
2885 updatescrollmode(p, info, vc);
2886 scrollback_max = 0;
2887 scrollback_current = 0;
2888
2889 if (!fbcon_is_inactive(vc, info)) {
2890 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2891 ops->update_start(info);
2892 }
2893
2894 fbcon_set_palette(vc, color_table);
2895 update_screen(vc);
2896 if (softback_buf)
2897 fbcon_update_softback(vc);
2898 }
2899 }
2900
2901 static void fbcon_set_all_vcs(struct fb_info *info)
2902 {
2903 struct fbcon_ops *ops = info->fbcon_par;
2904 struct vc_data *vc;
2905 struct display *p;
2906 int i, rows, cols, fg = -1;
2907
2908 if (!ops || ops->currcon < 0)
2909 return;
2910
2911 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2912 vc = vc_cons[i].d;
2913 if (!vc || vc->vc_mode != KD_TEXT ||
2914 registered_fb[con2fb_map[i]] != info)
2915 continue;
2916
2917 if (CON_IS_VISIBLE(vc)) {
2918 fg = i;
2919 continue;
2920 }
2921
2922 p = &fb_display[vc->vc_num];
2923 set_blitting_type(vc, info);
2924 var_to_display(p, &info->var, info);
2925 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2926 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2927 cols /= vc->vc_font.width;
2928 rows /= vc->vc_font.height;
2929 vc_resize(vc, cols, rows);
2930 }
2931
2932 if (fg != -1)
2933 fbcon_modechanged(info);
2934 }
2935
2936 static int fbcon_mode_deleted(struct fb_info *info,
2937 struct fb_videomode *mode)
2938 {
2939 struct fb_info *fb_info;
2940 struct display *p;
2941 int i, j, found = 0;
2942
2943 /* before deletion, ensure that mode is not in use */
2944 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2945 j = con2fb_map[i];
2946 if (j == -1)
2947 continue;
2948 fb_info = registered_fb[j];
2949 if (fb_info != info)
2950 continue;
2951 p = &fb_display[i];
2952 if (!p || !p->mode)
2953 continue;
2954 if (fb_mode_is_equal(p->mode, mode)) {
2955 found = 1;
2956 break;
2957 }
2958 }
2959 return found;
2960 }
2961
2962 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2963 static int fbcon_unbind(void)
2964 {
2965 int ret;
2966
2967 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2968 fbcon_is_default);
2969
2970 if (!ret)
2971 fbcon_has_console_bind = 0;
2972
2973 return ret;
2974 }
2975 #else
2976 static inline int fbcon_unbind(void)
2977 {
2978 return -EINVAL;
2979 }
2980 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2981
2982 static int fbcon_fb_unbind(int idx)
2983 {
2984 int i, new_idx = -1, ret = 0;
2985
2986 if (!fbcon_has_console_bind)
2987 return 0;
2988
2989 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2990 if (con2fb_map[i] != idx &&
2991 con2fb_map[i] != -1) {
2992 new_idx = i;
2993 break;
2994 }
2995 }
2996
2997 if (new_idx != -1) {
2998 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2999 if (con2fb_map[i] == idx)
3000 set_con2fb_map(i, new_idx, 0);
3001 }
3002 } else
3003 ret = fbcon_unbind();
3004
3005 return ret;
3006 }
3007
3008 static int fbcon_fb_unregistered(struct fb_info *info)
3009 {
3010 int i, idx;
3011
3012 idx = info->node;
3013 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3014 if (con2fb_map[i] == idx)
3015 con2fb_map[i] = -1;
3016 }
3017
3018 if (idx == info_idx) {
3019 info_idx = -1;
3020
3021 for (i = 0; i < FB_MAX; i++) {
3022 if (registered_fb[i] != NULL) {
3023 info_idx = i;
3024 break;
3025 }
3026 }
3027 }
3028
3029 if (info_idx != -1) {
3030 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3031 if (con2fb_map[i] == -1)
3032 con2fb_map[i] = info_idx;
3033 }
3034 }
3035
3036 if (primary_device == idx)
3037 primary_device = -1;
3038
3039 if (!num_registered_fb)
3040 unregister_con_driver(&fb_con);
3041
3042 return 0;
3043 }
3044
3045 static void fbcon_remap_all(int idx)
3046 {
3047 int i;
3048 for (i = first_fb_vc; i <= last_fb_vc; i++)
3049 set_con2fb_map(i, idx, 0);
3050
3051 if (con_is_bound(&fb_con)) {
3052 printk(KERN_INFO "fbcon: Remapping primary device, "
3053 "fb%i, to tty %i-%i\n", idx,
3054 first_fb_vc + 1, last_fb_vc + 1);
3055 info_idx = idx;
3056 }
3057 }
3058
3059 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3060 static void fbcon_select_primary(struct fb_info *info)
3061 {
3062 if (!map_override && primary_device == -1 &&
3063 fb_is_primary_device(info)) {
3064 int i;
3065
3066 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3067 info->fix.id, info->node);
3068 primary_device = info->node;
3069
3070 for (i = first_fb_vc; i <= last_fb_vc; i++)
3071 con2fb_map_boot[i] = primary_device;
3072
3073 if (con_is_bound(&fb_con)) {
3074 printk(KERN_INFO "fbcon: Remapping primary device, "
3075 "fb%i, to tty %i-%i\n", info->node,
3076 first_fb_vc + 1, last_fb_vc + 1);
3077 info_idx = primary_device;
3078 }
3079 }
3080
3081 }
3082 #else
3083 static inline void fbcon_select_primary(struct fb_info *info)
3084 {
3085 return;
3086 }
3087 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3088
3089 static int fbcon_fb_registered(struct fb_info *info)
3090 {
3091 int ret = 0, i, idx;
3092
3093 idx = info->node;
3094 fbcon_select_primary(info);
3095
3096 if (info_idx == -1) {
3097 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3098 if (con2fb_map_boot[i] == idx) {
3099 info_idx = idx;
3100 break;
3101 }
3102 }
3103
3104 if (info_idx != -1)
3105 ret = fbcon_takeover(1);
3106 } else {
3107 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3108 if (con2fb_map_boot[i] == idx)
3109 set_con2fb_map(i, idx, 0);
3110 }
3111 }
3112
3113 return ret;
3114 }
3115
3116 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3117 {
3118 struct fbcon_ops *ops = info->fbcon_par;
3119 struct vc_data *vc;
3120
3121 if (!ops || ops->currcon < 0)
3122 return;
3123
3124 vc = vc_cons[ops->currcon].d;
3125 if (vc->vc_mode != KD_TEXT ||
3126 registered_fb[con2fb_map[ops->currcon]] != info)
3127 return;
3128
3129 if (CON_IS_VISIBLE(vc)) {
3130 if (blank)
3131 do_blank_screen(0);
3132 else
3133 do_unblank_screen(0);
3134 }
3135 ops->blank_state = blank;
3136 }
3137
3138 static void fbcon_new_modelist(struct fb_info *info)
3139 {
3140 int i;
3141 struct vc_data *vc;
3142 struct fb_var_screeninfo var;
3143 const struct fb_videomode *mode;
3144
3145 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3146 if (registered_fb[con2fb_map[i]] != info)
3147 continue;
3148 if (!fb_display[i].mode)
3149 continue;
3150 vc = vc_cons[i].d;
3151 display_to_var(&var, &fb_display[i]);
3152 mode = fb_find_nearest_mode(fb_display[i].mode,
3153 &info->modelist);
3154 fb_videomode_to_var(&var, mode);
3155 fbcon_set_disp(info, &var, vc->vc_num);
3156 }
3157 }
3158
3159 static void fbcon_get_requirement(struct fb_info *info,
3160 struct fb_blit_caps *caps)
3161 {
3162 struct vc_data *vc;
3163 struct display *p;
3164
3165 if (caps->flags) {
3166 int i, charcnt;
3167
3168 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3169 vc = vc_cons[i].d;
3170 if (vc && vc->vc_mode == KD_TEXT &&
3171 info->node == con2fb_map[i]) {
3172 p = &fb_display[i];
3173 caps->x |= 1 << (vc->vc_font.width - 1);
3174 caps->y |= 1 << (vc->vc_font.height - 1);
3175 charcnt = (p->userfont) ?
3176 FNTCHARCNT(p->fontdata) : 256;
3177 if (caps->len < charcnt)
3178 caps->len = charcnt;
3179 }
3180 }
3181 } else {
3182 vc = vc_cons[fg_console].d;
3183
3184 if (vc && vc->vc_mode == KD_TEXT &&
3185 info->node == con2fb_map[fg_console]) {
3186 p = &fb_display[fg_console];
3187 caps->x = 1 << (vc->vc_font.width - 1);
3188 caps->y = 1 << (vc->vc_font.height - 1);
3189 caps->len = (p->userfont) ?
3190 FNTCHARCNT(p->fontdata) : 256;
3191 }
3192 }
3193 }
3194
3195 static int fbcon_event_notify(struct notifier_block *self,
3196 unsigned long action, void *data)
3197 {
3198 struct fb_event *event = data;
3199 struct fb_info *info = event->info;
3200 struct fb_videomode *mode;
3201 struct fb_con2fbmap *con2fb;
3202 struct fb_blit_caps *caps;
3203 int idx, ret = 0;
3204
3205 /*
3206 * ignore all events except driver registration and deregistration
3207 * if fbcon is not active
3208 */
3209 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3210 action == FB_EVENT_FB_UNREGISTERED))
3211 goto done;
3212
3213 switch(action) {
3214 case FB_EVENT_SUSPEND:
3215 fbcon_suspended(info);
3216 break;
3217 case FB_EVENT_RESUME:
3218 fbcon_resumed(info);
3219 break;
3220 case FB_EVENT_MODE_CHANGE:
3221 fbcon_modechanged(info);
3222 break;
3223 case FB_EVENT_MODE_CHANGE_ALL:
3224 fbcon_set_all_vcs(info);
3225 break;
3226 case FB_EVENT_MODE_DELETE:
3227 mode = event->data;
3228 ret = fbcon_mode_deleted(info, mode);
3229 break;
3230 case FB_EVENT_FB_UNBIND:
3231 idx = info->node;
3232 ret = fbcon_fb_unbind(idx);
3233 break;
3234 case FB_EVENT_FB_REGISTERED:
3235 ret = fbcon_fb_registered(info);
3236 break;
3237 case FB_EVENT_FB_UNREGISTERED:
3238 ret = fbcon_fb_unregistered(info);
3239 break;
3240 case FB_EVENT_SET_CONSOLE_MAP:
3241 con2fb = event->data;
3242 ret = set_con2fb_map(con2fb->console - 1,
3243 con2fb->framebuffer, 1);
3244 break;
3245 case FB_EVENT_GET_CONSOLE_MAP:
3246 con2fb = event->data;
3247 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3248 break;
3249 case FB_EVENT_BLANK:
3250 fbcon_fb_blanked(info, *(int *)event->data);
3251 break;
3252 case FB_EVENT_NEW_MODELIST:
3253 fbcon_new_modelist(info);
3254 break;
3255 case FB_EVENT_GET_REQ:
3256 caps = event->data;
3257 fbcon_get_requirement(info, caps);
3258 break;
3259 case FB_EVENT_REMAP_ALL_CONSOLE:
3260 idx = info->node;
3261 fbcon_remap_all(idx);
3262 break;
3263 }
3264 done:
3265 return ret;
3266 }
3267
3268 /*
3269 * The console `switch' structure for the frame buffer based console
3270 */
3271
3272 static const struct consw fb_con = {
3273 .owner = THIS_MODULE,
3274 .con_startup = fbcon_startup,
3275 .con_init = fbcon_init,
3276 .con_deinit = fbcon_deinit,
3277 .con_clear = fbcon_clear,
3278 .con_putc = fbcon_putc,
3279 .con_putcs = fbcon_putcs,
3280 .con_cursor = fbcon_cursor,
3281 .con_scroll = fbcon_scroll,
3282 .con_bmove = fbcon_bmove,
3283 .con_switch = fbcon_switch,
3284 .con_blank = fbcon_blank,
3285 .con_font_set = fbcon_set_font,
3286 .con_font_get = fbcon_get_font,
3287 .con_font_default = fbcon_set_def_font,
3288 .con_font_copy = fbcon_copy_font,
3289 .con_set_palette = fbcon_set_palette,
3290 .con_scrolldelta = fbcon_scrolldelta,
3291 .con_set_origin = fbcon_set_origin,
3292 .con_invert_region = fbcon_invert_region,
3293 .con_screen_pos = fbcon_screen_pos,
3294 .con_getxy = fbcon_getxy,
3295 .con_resize = fbcon_resize,
3296 .con_debug_enter = fbcon_debug_enter,
3297 .con_debug_leave = fbcon_debug_leave,
3298 };
3299
3300 static struct notifier_block fbcon_event_notifier = {
3301 .notifier_call = fbcon_event_notify,
3302 };
3303
3304 static ssize_t store_rotate(struct device *device,
3305 struct device_attribute *attr, const char *buf,
3306 size_t count)
3307 {
3308 struct fb_info *info;
3309 int rotate, idx;
3310 char **last = NULL;
3311
3312 if (fbcon_has_exited)
3313 return count;
3314
3315 acquire_console_sem();
3316 idx = con2fb_map[fg_console];
3317
3318 if (idx == -1 || registered_fb[idx] == NULL)
3319 goto err;
3320
3321 info = registered_fb[idx];
3322 rotate = simple_strtoul(buf, last, 0);
3323 fbcon_rotate(info, rotate);
3324 err:
3325 release_console_sem();
3326 return count;
3327 }
3328
3329 static ssize_t store_rotate_all(struct device *device,
3330 struct device_attribute *attr,const char *buf,
3331 size_t count)
3332 {
3333 struct fb_info *info;
3334 int rotate, idx;
3335 char **last = NULL;
3336
3337 if (fbcon_has_exited)
3338 return count;
3339
3340 acquire_console_sem();
3341 idx = con2fb_map[fg_console];
3342
3343 if (idx == -1 || registered_fb[idx] == NULL)
3344 goto err;
3345
3346 info = registered_fb[idx];
3347 rotate = simple_strtoul(buf, last, 0);
3348 fbcon_rotate_all(info, rotate);
3349 err:
3350 release_console_sem();
3351 return count;
3352 }
3353
3354 static ssize_t show_rotate(struct device *device,
3355 struct device_attribute *attr,char *buf)
3356 {
3357 struct fb_info *info;
3358 int rotate = 0, idx;
3359
3360 if (fbcon_has_exited)
3361 return 0;
3362
3363 acquire_console_sem();
3364 idx = con2fb_map[fg_console];
3365
3366 if (idx == -1 || registered_fb[idx] == NULL)
3367 goto err;
3368
3369 info = registered_fb[idx];
3370 rotate = fbcon_get_rotate(info);
3371 err:
3372 release_console_sem();
3373 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3374 }
3375
3376 static ssize_t show_cursor_blink(struct device *device,
3377 struct device_attribute *attr, char *buf)
3378 {
3379 struct fb_info *info;
3380 struct fbcon_ops *ops;
3381 int idx, blink = -1;
3382
3383 if (fbcon_has_exited)
3384 return 0;
3385
3386 acquire_console_sem();
3387 idx = con2fb_map[fg_console];
3388
3389 if (idx == -1 || registered_fb[idx] == NULL)
3390 goto err;
3391
3392 info = registered_fb[idx];
3393 ops = info->fbcon_par;
3394
3395 if (!ops)
3396 goto err;
3397
3398 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3399 err:
3400 release_console_sem();
3401 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3402 }
3403
3404 static ssize_t store_cursor_blink(struct device *device,
3405 struct device_attribute *attr,
3406 const char *buf, size_t count)
3407 {
3408 struct fb_info *info;
3409 int blink, idx;
3410 char **last = NULL;
3411
3412 if (fbcon_has_exited)
3413 return count;
3414
3415 acquire_console_sem();
3416 idx = con2fb_map[fg_console];
3417
3418 if (idx == -1 || registered_fb[idx] == NULL)
3419 goto err;
3420
3421 info = registered_fb[idx];
3422
3423 if (!info->fbcon_par)
3424 goto err;
3425
3426 blink = simple_strtoul(buf, last, 0);
3427
3428 if (blink) {
3429 fbcon_cursor_noblink = 0;
3430 fbcon_add_cursor_timer(info);
3431 } else {
3432 fbcon_cursor_noblink = 1;
3433 fbcon_del_cursor_timer(info);
3434 }
3435
3436 err:
3437 release_console_sem();
3438 return count;
3439 }
3440
3441 static struct device_attribute device_attrs[] = {
3442 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3443 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3444 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3445 store_cursor_blink),
3446 };
3447
3448 static int fbcon_init_device(void)
3449 {
3450 int i, error = 0;
3451
3452 fbcon_has_sysfs = 1;
3453
3454 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3455 error = device_create_file(fbcon_device, &device_attrs[i]);
3456
3457 if (error)
3458 break;
3459 }
3460
3461 if (error) {
3462 while (--i >= 0)
3463 device_remove_file(fbcon_device, &device_attrs[i]);
3464
3465 fbcon_has_sysfs = 0;
3466 }
3467
3468 return 0;
3469 }
3470
3471 static void fbcon_start(void)
3472 {
3473 if (num_registered_fb) {
3474 int i;
3475
3476 acquire_console_sem();
3477
3478 for (i = 0; i < FB_MAX; i++) {
3479 if (registered_fb[i] != NULL) {
3480 info_idx = i;
3481 break;
3482 }
3483 }
3484
3485 release_console_sem();
3486 fbcon_takeover(0);
3487 }
3488 }
3489
3490 static void fbcon_exit(void)
3491 {
3492 struct fb_info *info;
3493 int i, j, mapped;
3494
3495 if (fbcon_has_exited)
3496 return;
3497
3498 kfree((void *)softback_buf);
3499 softback_buf = 0UL;
3500
3501 for (i = 0; i < FB_MAX; i++) {
3502 int pending = 0;
3503
3504 mapped = 0;
3505 info = registered_fb[i];
3506
3507 if (info == NULL)
3508 continue;
3509
3510 if (info->queue.func)
3511 pending = cancel_work_sync(&info->queue);
3512 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3513 "no"));
3514
3515 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3516 if (con2fb_map[j] == i)
3517 mapped = 1;
3518 }
3519
3520 if (mapped) {
3521 if (info->fbops->fb_release)
3522 info->fbops->fb_release(info, 0);
3523 module_put(info->fbops->owner);
3524
3525 if (info->fbcon_par) {
3526 struct fbcon_ops *ops = info->fbcon_par;
3527
3528 fbcon_del_cursor_timer(info);
3529 kfree(ops->cursor_src);
3530 kfree(info->fbcon_par);
3531 info->fbcon_par = NULL;
3532 }
3533
3534 if (info->queue.func == fb_flashcursor)
3535 info->queue.func = NULL;
3536 }
3537 }
3538
3539 fbcon_has_exited = 1;
3540 }
3541
3542 static int __init fb_console_init(void)
3543 {
3544 int i;
3545
3546 acquire_console_sem();
3547 fb_register_client(&fbcon_event_notifier);
3548 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3549 "fbcon");
3550
3551 if (IS_ERR(fbcon_device)) {
3552 printk(KERN_WARNING "Unable to create device "
3553 "for fbcon; errno = %ld\n",
3554 PTR_ERR(fbcon_device));
3555 fbcon_device = NULL;
3556 } else
3557 fbcon_init_device();
3558
3559 for (i = 0; i < MAX_NR_CONSOLES; i++)
3560 con2fb_map[i] = -1;
3561
3562 release_console_sem();
3563 fbcon_start();
3564 return 0;
3565 }
3566
3567 module_init(fb_console_init);
3568
3569 #ifdef MODULE
3570
3571 static void __exit fbcon_deinit_device(void)
3572 {
3573 int i;
3574
3575 if (fbcon_has_sysfs) {
3576 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3577 device_remove_file(fbcon_device, &device_attrs[i]);
3578
3579 fbcon_has_sysfs = 0;
3580 }
3581 }
3582
3583 static void __exit fb_console_exit(void)
3584 {
3585 acquire_console_sem();
3586 fb_unregister_client(&fbcon_event_notifier);
3587 fbcon_deinit_device();
3588 device_destroy(fb_class, MKDEV(0, 0));
3589 fbcon_exit();
3590 release_console_sem();
3591 unregister_con_driver(&fb_con);
3592 }
3593
3594 module_exit(fb_console_exit);
3595
3596 #endif
3597
3598 MODULE_LICENSE("GPL");
Tomato firmware and modifications.