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kasan: enable instrumentation of global variables
[linux-2.6/btrfs-unstable.git] / drivers / video / console / fbcon.c
blobb97210671a81965379626de4d86a6a4b37a730fd
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80
81 #include "fbcon.h"
82
83 #ifdef FBCONDEBUG
84 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
85 #else
86 # define DPRINTK(fmt, args...)
87 #endif
88
89 enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93 };
94
95 static struct display fb_display[MAX_NR_CONSOLES];
96
97 static signed char con2fb_map[MAX_NR_CONSOLES];
98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
99
100 static int logo_lines;
101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103 static int logo_shown = FBCON_LOGO_CANSHOW;
104 /* Software scrollback */
105 static int fbcon_softback_size = 32768;
106 static unsigned long softback_buf, softback_curr;
107 static unsigned long softback_in;
108 static unsigned long softback_top, softback_end;
109 static int softback_lines;
110 /* console mappings */
111 static int first_fb_vc;
112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
113 static int fbcon_is_default = 1;
114 static int fbcon_has_exited;
115 static int primary_device = -1;
116 static int fbcon_has_console_bind;
117
118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
119 static int map_override;
120
121 static inline void fbcon_map_override(void)
122 {
123 map_override = 1;
124 }
125 #else
126 static inline void fbcon_map_override(void)
127 {
128 }
129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
131 /* font data */
132 static char fontname[40];
133
134 /* current fb_info */
135 static int info_idx = -1;
136
137 /* console rotation */
138 static int initial_rotation;
139 static int fbcon_has_sysfs;
140
141 static const struct consw fb_con;
142
143 #define CM_SOFTBACK (8)
144
145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
147 static int fbcon_set_origin(struct vc_data *);
148
149 static int fbcon_cursor_noblink;
150
151 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153 /*
154 * Interface used by the world
155 */
156
157 static const char *fbcon_startup(void);
158 static void fbcon_init(struct vc_data *vc, int init);
159 static void fbcon_deinit(struct vc_data *vc);
160 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166 static void fbcon_cursor(struct vc_data *vc, int mode);
167 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171 static int fbcon_switch(struct vc_data *vc);
172 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176 /*
177 * Internal routines
178 */
179 static __inline__ void ywrap_up(struct vc_data *vc, int count);
180 static __inline__ void ywrap_down(struct vc_data *vc, int count);
181 static __inline__ void ypan_up(struct vc_data *vc, int count);
182 static __inline__ void ypan_down(struct vc_data *vc, int count);
183 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
184 int dy, int dx, int height, int width, u_int y_break);
185 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
186 int unit);
187 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
188 int line, int count, int dy);
189 static void fbcon_modechanged(struct fb_info *info);
190 static void fbcon_set_all_vcs(struct fb_info *info);
191 static void fbcon_start(void);
192 static void fbcon_exit(void);
193 static struct device *fbcon_device;
194
195 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
196 static inline void fbcon_set_rotation(struct fb_info *info)
197 {
198 struct fbcon_ops *ops = info->fbcon_par;
199
200 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
201 ops->p->con_rotate < 4)
202 ops->rotate = ops->p->con_rotate;
203 else
204 ops->rotate = 0;
205 }
206
207 static void fbcon_rotate(struct fb_info *info, u32 rotate)
208 {
209 struct fbcon_ops *ops= info->fbcon_par;
210 struct fb_info *fb_info;
211
212 if (!ops || ops->currcon == -1)
213 return;
214
215 fb_info = registered_fb[con2fb_map[ops->currcon]];
216
217 if (info == fb_info) {
218 struct display *p = &fb_display[ops->currcon];
219
220 if (rotate < 4)
221 p->con_rotate = rotate;
222 else
223 p->con_rotate = 0;
224
225 fbcon_modechanged(info);
226 }
227 }
228
229 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
230 {
231 struct fbcon_ops *ops = info->fbcon_par;
232 struct vc_data *vc;
233 struct display *p;
234 int i;
235
236 if (!ops || ops->currcon < 0 || rotate > 3)
237 return;
238
239 for (i = first_fb_vc; i <= last_fb_vc; i++) {
240 vc = vc_cons[i].d;
241 if (!vc || vc->vc_mode != KD_TEXT ||
242 registered_fb[con2fb_map[i]] != info)
243 continue;
244
245 p = &fb_display[vc->vc_num];
246 p->con_rotate = rotate;
247 }
248
249 fbcon_set_all_vcs(info);
250 }
251 #else
252 static inline void fbcon_set_rotation(struct fb_info *info)
253 {
254 struct fbcon_ops *ops = info->fbcon_par;
255
256 ops->rotate = FB_ROTATE_UR;
257 }
258
259 static void fbcon_rotate(struct fb_info *info, u32 rotate)
260 {
261 return;
262 }
263
264 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
265 {
266 return;
267 }
268 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
269
270 static int fbcon_get_rotate(struct fb_info *info)
271 {
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 return (ops) ? ops->rotate : 0;
275 }
276
277 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
278 {
279 struct fbcon_ops *ops = info->fbcon_par;
280
281 return (info->state != FBINFO_STATE_RUNNING ||
282 vc->vc_mode != KD_TEXT || ops->graphics) &&
283 !vt_force_oops_output(vc);
284 }
285
286 static int get_color(struct vc_data *vc, struct fb_info *info,
287 u16 c, int is_fg)
288 {
289 int depth = fb_get_color_depth(&info->var, &info->fix);
290 int color = 0;
291
292 if (console_blanked) {
293 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
294
295 c = vc->vc_video_erase_char & charmask;
296 }
297
298 if (depth != 1)
299 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
300 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
301
302 switch (depth) {
303 case 1:
304 {
305 int col = mono_col(info);
306 /* 0 or 1 */
307 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
308 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
309
310 if (console_blanked)
311 fg = bg;
312
313 color = (is_fg) ? fg : bg;
314 break;
315 }
316 case 2:
317 /*
318 * Scale down 16-colors to 4 colors. Default 4-color palette
319 * is grayscale. However, simply dividing the values by 4
320 * will not work, as colors 1, 2 and 3 will be scaled-down
321 * to zero rendering them invisible. So empirically convert
322 * colors to a sane 4-level grayscale.
323 */
324 switch (color) {
325 case 0:
326 color = 0; /* black */
327 break;
328 case 1 ... 6:
329 color = 2; /* white */
330 break;
331 case 7 ... 8:
332 color = 1; /* gray */
333 break;
334 default:
335 color = 3; /* intense white */
336 break;
337 }
338 break;
339 case 3:
340 /*
341 * Last 8 entries of default 16-color palette is a more intense
342 * version of the first 8 (i.e., same chrominance, different
343 * luminance).
344 */
345 color &= 7;
346 break;
347 }
348
349
350 return color;
351 }
352
353 static void fbcon_update_softback(struct vc_data *vc)
354 {
355 int l = fbcon_softback_size / vc->vc_size_row;
356
357 if (l > 5)
358 softback_end = softback_buf + l * vc->vc_size_row;
359 else
360 /* Smaller scrollback makes no sense, and 0 would screw
361 the operation totally */
362 softback_top = 0;
363 }
364
365 static void fb_flashcursor(struct work_struct *work)
366 {
367 struct fb_info *info = container_of(work, struct fb_info, queue);
368 struct fbcon_ops *ops = info->fbcon_par;
369 struct vc_data *vc = NULL;
370 int c;
371 int mode;
372 int ret;
373
374 /* FIXME: we should sort out the unbind locking instead */
375 /* instead we just fail to flash the cursor if we can't get
376 * the lock instead of blocking fbcon deinit */
377 ret = console_trylock();
378 if (ret == 0)
379 return;
380
381 if (ops && ops->currcon != -1)
382 vc = vc_cons[ops->currcon].d;
383
384 if (!vc || !CON_IS_VISIBLE(vc) ||
385 registered_fb[con2fb_map[vc->vc_num]] != info ||
386 vc->vc_deccm != 1) {
387 console_unlock();
388 return;
389 }
390
391 c = scr_readw((u16 *) vc->vc_pos);
392 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
393 CM_ERASE : CM_DRAW;
394 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
395 get_color(vc, info, c, 0));
396 console_unlock();
397 }
398
399 static void cursor_timer_handler(unsigned long dev_addr)
400 {
401 struct fb_info *info = (struct fb_info *) dev_addr;
402 struct fbcon_ops *ops = info->fbcon_par;
403
404 queue_work(system_power_efficient_wq, &info->queue);
405 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
406 }
407
408 static void fbcon_add_cursor_timer(struct fb_info *info)
409 {
410 struct fbcon_ops *ops = info->fbcon_par;
411
412 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
413 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
414 !fbcon_cursor_noblink) {
415 if (!info->queue.func)
416 INIT_WORK(&info->queue, fb_flashcursor);
417
418 init_timer(&ops->cursor_timer);
419 ops->cursor_timer.function = cursor_timer_handler;
420 ops->cursor_timer.expires = jiffies + HZ / 5;
421 ops->cursor_timer.data = (unsigned long ) info;
422 add_timer(&ops->cursor_timer);
423 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
424 }
425 }
426
427 static void fbcon_del_cursor_timer(struct fb_info *info)
428 {
429 struct fbcon_ops *ops = info->fbcon_par;
430
431 if (info->queue.func == fb_flashcursor &&
432 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
433 del_timer_sync(&ops->cursor_timer);
434 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
435 }
436 }
437
438 #ifndef MODULE
439 static int __init fb_console_setup(char *this_opt)
440 {
441 char *options;
442 int i, j;
443
444 if (!this_opt || !*this_opt)
445 return 1;
446
447 while ((options = strsep(&this_opt, ",")) != NULL) {
448 if (!strncmp(options, "font:", 5)) {
449 strlcpy(fontname, options + 5, sizeof(fontname));
450 continue;
451 }
452
453 if (!strncmp(options, "scrollback:", 11)) {
454 options += 11;
455 if (*options) {
456 fbcon_softback_size = simple_strtoul(options, &options, 0);
457 if (*options == 'k' || *options == 'K') {
458 fbcon_softback_size *= 1024;
459 }
460 }
461 continue;
462 }
463
464 if (!strncmp(options, "map:", 4)) {
465 options += 4;
466 if (*options) {
467 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
468 if (!options[j])
469 j = 0;
470 con2fb_map_boot[i] =
471 (options[j++]-'0') % FB_MAX;
472 }
473
474 fbcon_map_override();
475 }
476 continue;
477 }
478
479 if (!strncmp(options, "vc:", 3)) {
480 options += 3;
481 if (*options)
482 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 if (first_fb_vc < 0)
484 first_fb_vc = 0;
485 if (*options++ == '-')
486 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
487 fbcon_is_default = 0;
488 continue;
489 }
490
491 if (!strncmp(options, "rotate:", 7)) {
492 options += 7;
493 if (*options)
494 initial_rotation = simple_strtoul(options, &options, 0);
495 if (initial_rotation > 3)
496 initial_rotation = 0;
497 continue;
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 do_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 = do_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 info_idx = -1;
548 } else {
549 fbcon_has_console_bind = 1;
550 }
551
552 return err;
553 }
554
555 #ifdef MODULE
556 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
557 int cols, int rows, int new_cols, int new_rows)
558 {
559 logo_shown = FBCON_LOGO_DONTSHOW;
560 }
561 #else
562 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
563 int cols, int rows, int new_cols, int new_rows)
564 {
565 /* Need to make room for the logo */
566 struct fbcon_ops *ops = info->fbcon_par;
567 int cnt, erase = vc->vc_video_erase_char, step;
568 unsigned short *save = NULL, *r, *q;
569 int logo_height;
570
571 if (info->flags & FBINFO_MODULE) {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 return;
574 }
575
576 /*
577 * remove underline attribute from erase character
578 * if black and white framebuffer.
579 */
580 if (fb_get_color_depth(&info->var, &info->fix) == 1)
581 erase &= ~0x400;
582 logo_height = fb_prepare_logo(info, ops->rotate);
583 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
584 q = (unsigned short *) (vc->vc_origin +
585 vc->vc_size_row * rows);
586 step = logo_lines * cols;
587 for (r = q - logo_lines * cols; r < q; r++)
588 if (scr_readw(r) != vc->vc_video_erase_char)
589 break;
590 if (r != q && new_rows >= rows + logo_lines) {
591 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
592 if (save) {
593 int i = cols < new_cols ? cols : new_cols;
594 scr_memsetw(save, erase, logo_lines * new_cols * 2);
595 r = q - step;
596 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
597 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
598 r = q;
599 }
600 }
601 if (r == q) {
602 /* We can scroll screen down */
603 r = q - step - cols;
604 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
605 scr_memcpyw(r + step, r, vc->vc_size_row);
606 r -= cols;
607 }
608 if (!save) {
609 int lines;
610 if (vc->vc_y + logo_lines >= rows)
611 lines = rows - vc->vc_y - 1;
612 else
613 lines = logo_lines;
614 vc->vc_y += lines;
615 vc->vc_pos += lines * vc->vc_size_row;
616 }
617 }
618 scr_memsetw((unsigned short *) vc->vc_origin,
619 erase,
620 vc->vc_size_row * logo_lines);
621
622 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
623 fbcon_clear_margins(vc, 0);
624 update_screen(vc);
625 }
626
627 if (save) {
628 q = (unsigned short *) (vc->vc_origin +
629 vc->vc_size_row *
630 rows);
631 scr_memcpyw(q, save, logo_lines * new_cols * 2);
632 vc->vc_y += logo_lines;
633 vc->vc_pos += logo_lines * vc->vc_size_row;
634 kfree(save);
635 }
636
637 if (logo_lines > vc->vc_bottom) {
638 logo_shown = FBCON_LOGO_CANSHOW;
639 printk(KERN_INFO
640 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
641 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
642 logo_shown = FBCON_LOGO_DRAW;
643 vc->vc_top = logo_lines;
644 }
645 }
646 #endif /* MODULE */
647
648 #ifdef CONFIG_FB_TILEBLITTING
649 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
650 {
651 struct fbcon_ops *ops = info->fbcon_par;
652
653 ops->p = &fb_display[vc->vc_num];
654
655 if ((info->flags & FBINFO_MISC_TILEBLITTING))
656 fbcon_set_tileops(vc, info);
657 else {
658 fbcon_set_rotation(info);
659 fbcon_set_bitops(ops);
660 }
661 }
662
663 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
664 {
665 int err = 0;
666
667 if (info->flags & FBINFO_MISC_TILEBLITTING &&
668 info->tileops->fb_get_tilemax(info) < charcount)
669 err = 1;
670
671 return err;
672 }
673 #else
674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
675 {
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 info->flags &= ~FBINFO_MISC_TILEBLITTING;
679 ops->p = &fb_display[vc->vc_num];
680 fbcon_set_rotation(info);
681 fbcon_set_bitops(ops);
682 }
683
684 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
685 {
686 return 0;
687 }
688
689 #endif /* CONFIG_MISC_TILEBLITTING */
690
691
692 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
693 int unit, int oldidx)
694 {
695 struct fbcon_ops *ops = NULL;
696 int err = 0;
697
698 if (!try_module_get(info->fbops->owner))
699 err = -ENODEV;
700
701 if (!err && info->fbops->fb_open &&
702 info->fbops->fb_open(info, 0))
703 err = -ENODEV;
704
705 if (!err) {
706 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
707 if (!ops)
708 err = -ENOMEM;
709 }
710
711 if (!err) {
712 info->fbcon_par = ops;
713
714 if (vc)
715 set_blitting_type(vc, info);
716 }
717
718 if (err) {
719 con2fb_map[unit] = oldidx;
720 module_put(info->fbops->owner);
721 }
722
723 return err;
724 }
725
726 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
727 struct fb_info *newinfo, int unit,
728 int oldidx, int found)
729 {
730 struct fbcon_ops *ops = oldinfo->fbcon_par;
731 int err = 0, ret;
732
733 if (oldinfo->fbops->fb_release &&
734 oldinfo->fbops->fb_release(oldinfo, 0)) {
735 con2fb_map[unit] = oldidx;
736 if (!found && newinfo->fbops->fb_release)
737 newinfo->fbops->fb_release(newinfo, 0);
738 if (!found)
739 module_put(newinfo->fbops->owner);
740 err = -ENODEV;
741 }
742
743 if (!err) {
744 fbcon_del_cursor_timer(oldinfo);
745 kfree(ops->cursor_state.mask);
746 kfree(ops->cursor_data);
747 kfree(ops->cursor_src);
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 && 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 * This should be called with the console lock held.
816 */
817 static int set_con2fb_map(int unit, int newidx, int user)
818 {
819 struct vc_data *vc = vc_cons[unit].d;
820 int oldidx = con2fb_map[unit];
821 struct fb_info *info = registered_fb[newidx];
822 struct fb_info *oldinfo = NULL;
823 int found, err = 0;
824
825 if (oldidx == newidx)
826 return 0;
827
828 if (!info)
829 return -EINVAL;
830
831 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
832 info_idx = newidx;
833 return do_fbcon_takeover(0);
834 }
835
836 if (oldidx != -1)
837 oldinfo = registered_fb[oldidx];
838
839 found = search_fb_in_map(newidx);
840
841 con2fb_map[unit] = newidx;
842 if (!err && !found)
843 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
844
845
846 /*
847 * If old fb is not mapped to any of the consoles,
848 * fbcon should release it.
849 */
850 if (!err && oldinfo && !search_fb_in_map(oldidx))
851 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
852 found);
853
854 if (!err) {
855 int show_logo = (fg_console == 0 && !user &&
856 logo_shown != FBCON_LOGO_DONTSHOW);
857
858 if (!found)
859 fbcon_add_cursor_timer(info);
860 con2fb_map_boot[unit] = newidx;
861 con2fb_init_display(vc, info, unit, show_logo);
862 }
863
864 if (!search_fb_in_map(info_idx))
865 info_idx = newidx;
866
867 return err;
868 }
869
870 /*
871 * Low Level Operations
872 */
873 /* NOTE: fbcon cannot be __init: it may be called from do_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 && !vc->vc_font.data) {
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; /* FIXME Need to support more fonts */
999 } else {
1000 p->fontdata = vc->vc_font.data;
1001 }
1002
1003 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1004 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1005 cols /= vc->vc_font.width;
1006 rows /= vc->vc_font.height;
1007 vc_resize(vc, cols, rows);
1008
1009 DPRINTK("mode: %s\n", info->fix.id);
1010 DPRINTK("visual: %d\n", info->fix.visual);
1011 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1012 info->var.yres,
1013 info->var.bits_per_pixel);
1014
1015 fbcon_add_cursor_timer(info);
1016 fbcon_has_exited = 0;
1017 return display_desc;
1018 }
1019
1020 static void fbcon_init(struct vc_data *vc, int init)
1021 {
1022 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1023 struct fbcon_ops *ops;
1024 struct vc_data **default_mode = vc->vc_display_fg;
1025 struct vc_data *svc = *default_mode;
1026 struct display *t, *p = &fb_display[vc->vc_num];
1027 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1028 int cap, ret;
1029
1030 if (info_idx == -1 || info == NULL)
1031 return;
1032
1033 cap = info->flags;
1034
1035 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1036 (info->fix.type == FB_TYPE_TEXT))
1037 logo = 0;
1038
1039 if (var_to_display(p, &info->var, info))
1040 return;
1041
1042 if (!info->fbcon_par)
1043 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1044
1045 /* If we are not the first console on this
1046 fb, copy the font from that console */
1047 t = &fb_display[fg_console];
1048 if (!p->fontdata) {
1049 if (t->fontdata) {
1050 struct vc_data *fvc = vc_cons[fg_console].d;
1051
1052 vc->vc_font.data = (void *)(p->fontdata =
1053 fvc->vc_font.data);
1054 vc->vc_font.width = fvc->vc_font.width;
1055 vc->vc_font.height = fvc->vc_font.height;
1056 p->userfont = t->userfont;
1057
1058 if (p->userfont)
1059 REFCOUNT(p->fontdata)++;
1060 } else {
1061 const struct font_desc *font = NULL;
1062
1063 if (!fontname[0] || !(font = find_font(fontname)))
1064 font = get_default_font(info->var.xres,
1065 info->var.yres,
1066 info->pixmap.blit_x,
1067 info->pixmap.blit_y);
1068 vc->vc_font.width = font->width;
1069 vc->vc_font.height = font->height;
1070 vc->vc_font.data = (void *)(p->fontdata = font->data);
1071 vc->vc_font.charcount = 256; /* FIXME Need to
1072 support more fonts */
1073 }
1074 }
1075
1076 if (p->userfont)
1077 charcnt = FNTCHARCNT(p->fontdata);
1078
1079 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1080 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1081 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1082 if (charcnt == 256) {
1083 vc->vc_hi_font_mask = 0;
1084 } else {
1085 vc->vc_hi_font_mask = 0x100;
1086 if (vc->vc_can_do_color)
1087 vc->vc_complement_mask <<= 1;
1088 }
1089
1090 if (!*svc->vc_uni_pagedir_loc)
1091 con_set_default_unimap(svc);
1092 if (!*vc->vc_uni_pagedir_loc)
1093 con_copy_unimap(vc, svc);
1094
1095 ops = info->fbcon_par;
1096 p->con_rotate = initial_rotation;
1097 set_blitting_type(vc, info);
1098
1099 cols = vc->vc_cols;
1100 rows = vc->vc_rows;
1101 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1102 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1103 new_cols /= vc->vc_font.width;
1104 new_rows /= vc->vc_font.height;
1105
1106 /*
1107 * We must always set the mode. The mode of the previous console
1108 * driver could be in the same resolution but we are using different
1109 * hardware so we have to initialize the hardware.
1110 *
1111 * We need to do it in fbcon_init() to prevent screen corruption.
1112 */
1113 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1114 if (info->fbops->fb_set_par &&
1115 !(ops->flags & FBCON_FLAGS_INIT)) {
1116 ret = info->fbops->fb_set_par(info);
1117
1118 if (ret)
1119 printk(KERN_ERR "fbcon_init: detected "
1120 "unhandled fb_set_par error, "
1121 "error code %d\n", ret);
1122 }
1123
1124 ops->flags |= FBCON_FLAGS_INIT;
1125 }
1126
1127 ops->graphics = 0;
1128
1129 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1130 !(cap & FBINFO_HWACCEL_DISABLED))
1131 p->scrollmode = SCROLL_MOVE;
1132 else /* default to something safe */
1133 p->scrollmode = SCROLL_REDRAW;
1134
1135 /*
1136 * ++guenther: console.c:vc_allocate() relies on initializing
1137 * vc_{cols,rows}, but we must not set those if we are only
1138 * resizing the console.
1139 */
1140 if (init) {
1141 vc->vc_cols = new_cols;
1142 vc->vc_rows = new_rows;
1143 } else
1144 vc_resize(vc, new_cols, new_rows);
1145
1146 if (logo)
1147 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1148
1149 if (vc == svc && softback_buf)
1150 fbcon_update_softback(vc);
1151
1152 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1153 ops->rotate = FB_ROTATE_UR;
1154 set_blitting_type(vc, info);
1155 }
1156
1157 ops->p = &fb_display[fg_console];
1158 }
1159
1160 static void fbcon_free_font(struct display *p, bool freefont)
1161 {
1162 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1163 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1164 p->fontdata = NULL;
1165 p->userfont = 0;
1166 }
1167
1168 static void fbcon_deinit(struct vc_data *vc)
1169 {
1170 struct display *p = &fb_display[vc->vc_num];
1171 struct fb_info *info;
1172 struct fbcon_ops *ops;
1173 int idx;
1174 bool free_font = true;
1175
1176 idx = con2fb_map[vc->vc_num];
1177
1178 if (idx == -1)
1179 goto finished;
1180
1181 info = registered_fb[idx];
1182
1183 if (!info)
1184 goto finished;
1185
1186 if (info->flags & FBINFO_MISC_FIRMWARE)
1187 free_font = false;
1188 ops = info->fbcon_par;
1189
1190 if (!ops)
1191 goto finished;
1192
1193 if (CON_IS_VISIBLE(vc))
1194 fbcon_del_cursor_timer(info);
1195
1196 ops->flags &= ~FBCON_FLAGS_INIT;
1197 finished:
1198
1199 fbcon_free_font(p, free_font);
1200 if (free_font)
1201 vc->vc_font.data = NULL;
1202
1203 if (!con_is_bound(&fb_con))
1204 fbcon_exit();
1205
1206 return;
1207 }
1208
1209 /* ====================================================================== */
1210
1211 /* fbcon_XXX routines - interface used by the world
1212 *
1213 * This system is now divided into two levels because of complications
1214 * caused by hardware scrolling. Top level functions:
1215 *
1216 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1217 *
1218 * handles y values in range [0, scr_height-1] that correspond to real
1219 * screen positions. y_wrap shift means that first line of bitmap may be
1220 * anywhere on this display. These functions convert lineoffsets to
1221 * bitmap offsets and deal with the wrap-around case by splitting blits.
1222 *
1223 * fbcon_bmove_physical_8() -- These functions fast implementations
1224 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1225 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1226 *
1227 * WARNING:
1228 *
1229 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1230 * Implies should only really hardware scroll in rows. Only reason for
1231 * restriction is simplicity & efficiency at the moment.
1232 */
1233
1234 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1235 int width)
1236 {
1237 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1238 struct fbcon_ops *ops = info->fbcon_par;
1239
1240 struct display *p = &fb_display[vc->vc_num];
1241 u_int y_break;
1242
1243 if (fbcon_is_inactive(vc, info))
1244 return;
1245
1246 if (!height || !width)
1247 return;
1248
1249 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1250 vc->vc_top = 0;
1251 /*
1252 * If the font dimensions are not an integral of the display
1253 * dimensions then the ops->clear below won't end up clearing
1254 * the margins. Call clear_margins here in case the logo
1255 * bitmap stretched into the margin area.
1256 */
1257 fbcon_clear_margins(vc, 0);
1258 }
1259
1260 /* Split blits that cross physical y_wrap boundary */
1261
1262 y_break = p->vrows - p->yscroll;
1263 if (sy < y_break && sy + height - 1 >= y_break) {
1264 u_int b = y_break - sy;
1265 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267 width);
1268 } else
1269 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270 }
1271
1272 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273 int count, int ypos, int xpos)
1274 {
1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276 struct display *p = &fb_display[vc->vc_num];
1277 struct fbcon_ops *ops = info->fbcon_par;
1278
1279 if (!fbcon_is_inactive(vc, info))
1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281 get_color(vc, info, scr_readw(s), 1),
1282 get_color(vc, info, scr_readw(s), 0));
1283 }
1284
1285 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286 {
1287 unsigned short chr;
1288
1289 scr_writew(c, &chr);
1290 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291 }
1292
1293 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294 {
1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->clear_margins(vc, info, bottom_only);
1300 }
1301
1302 static void fbcon_cursor(struct vc_data *vc, int mode)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1306 int y;
1307 int c = scr_readw((u16 *) vc->vc_pos);
1308
1309 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1310 return;
1311
1312 if (vc->vc_cursor_type & 0x10)
1313 fbcon_del_cursor_timer(info);
1314 else
1315 fbcon_add_cursor_timer(info);
1316
1317 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1318 if (mode & CM_SOFTBACK) {
1319 mode &= ~CM_SOFTBACK;
1320 y = softback_lines;
1321 } else {
1322 if (softback_lines)
1323 fbcon_set_origin(vc);
1324 y = 0;
1325 }
1326
1327 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1328 get_color(vc, info, c, 0));
1329 }
1330
1331 static int scrollback_phys_max = 0;
1332 static int scrollback_max = 0;
1333 static int scrollback_current = 0;
1334
1335 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1336 int unit)
1337 {
1338 struct display *p, *t;
1339 struct vc_data **default_mode, *vc;
1340 struct vc_data *svc;
1341 struct fbcon_ops *ops = info->fbcon_par;
1342 int rows, cols, charcnt = 256;
1343
1344 p = &fb_display[unit];
1345
1346 if (var_to_display(p, var, info))
1347 return;
1348
1349 vc = vc_cons[unit].d;
1350
1351 if (!vc)
1352 return;
1353
1354 default_mode = vc->vc_display_fg;
1355 svc = *default_mode;
1356 t = &fb_display[svc->vc_num];
1357
1358 if (!vc->vc_font.data) {
1359 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1360 vc->vc_font.width = (*default_mode)->vc_font.width;
1361 vc->vc_font.height = (*default_mode)->vc_font.height;
1362 p->userfont = t->userfont;
1363 if (p->userfont)
1364 REFCOUNT(p->fontdata)++;
1365 }
1366 if (p->userfont)
1367 charcnt = FNTCHARCNT(p->fontdata);
1368
1369 var->activate = FB_ACTIVATE_NOW;
1370 info->var.activate = var->activate;
1371 var->yoffset = info->var.yoffset;
1372 var->xoffset = info->var.xoffset;
1373 fb_set_var(info, var);
1374 ops->var = info->var;
1375 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1376 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1377 if (charcnt == 256) {
1378 vc->vc_hi_font_mask = 0;
1379 } else {
1380 vc->vc_hi_font_mask = 0x100;
1381 if (vc->vc_can_do_color)
1382 vc->vc_complement_mask <<= 1;
1383 }
1384
1385 if (!*svc->vc_uni_pagedir_loc)
1386 con_set_default_unimap(svc);
1387 if (!*vc->vc_uni_pagedir_loc)
1388 con_copy_unimap(vc, svc);
1389
1390 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1391 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1392 cols /= vc->vc_font.width;
1393 rows /= vc->vc_font.height;
1394 vc_resize(vc, cols, rows);
1395
1396 if (CON_IS_VISIBLE(vc)) {
1397 update_screen(vc);
1398 if (softback_buf)
1399 fbcon_update_softback(vc);
1400 }
1401 }
1402
1403 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1404 {
1405 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1406 struct fbcon_ops *ops = info->fbcon_par;
1407 struct display *p = &fb_display[vc->vc_num];
1408
1409 p->yscroll += count;
1410 if (p->yscroll >= p->vrows) /* Deal with wrap */
1411 p->yscroll -= p->vrows;
1412 ops->var.xoffset = 0;
1413 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1414 ops->var.vmode |= FB_VMODE_YWRAP;
1415 ops->update_start(info);
1416 scrollback_max += count;
1417 if (scrollback_max > scrollback_phys_max)
1418 scrollback_max = scrollback_phys_max;
1419 scrollback_current = 0;
1420 }
1421
1422 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1423 {
1424 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1425 struct fbcon_ops *ops = info->fbcon_par;
1426 struct display *p = &fb_display[vc->vc_num];
1427
1428 p->yscroll -= count;
1429 if (p->yscroll < 0) /* Deal with wrap */
1430 p->yscroll += p->vrows;
1431 ops->var.xoffset = 0;
1432 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1433 ops->var.vmode |= FB_VMODE_YWRAP;
1434 ops->update_start(info);
1435 scrollback_max -= count;
1436 if (scrollback_max < 0)
1437 scrollback_max = 0;
1438 scrollback_current = 0;
1439 }
1440
1441 static __inline__ void ypan_up(struct vc_data *vc, int count)
1442 {
1443 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1444 struct display *p = &fb_display[vc->vc_num];
1445 struct fbcon_ops *ops = info->fbcon_par;
1446
1447 p->yscroll += count;
1448 if (p->yscroll > p->vrows - vc->vc_rows) {
1449 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1450 0, 0, 0, vc->vc_rows, vc->vc_cols);
1451 p->yscroll -= p->vrows - vc->vc_rows;
1452 }
1453
1454 ops->var.xoffset = 0;
1455 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1456 ops->var.vmode &= ~FB_VMODE_YWRAP;
1457 ops->update_start(info);
1458 fbcon_clear_margins(vc, 1);
1459 scrollback_max += count;
1460 if (scrollback_max > scrollback_phys_max)
1461 scrollback_max = scrollback_phys_max;
1462 scrollback_current = 0;
1463 }
1464
1465 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1466 {
1467 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1468 struct fbcon_ops *ops = info->fbcon_par;
1469 struct display *p = &fb_display[vc->vc_num];
1470
1471 p->yscroll += count;
1472
1473 if (p->yscroll > p->vrows - vc->vc_rows) {
1474 p->yscroll -= p->vrows - vc->vc_rows;
1475 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1476 }
1477
1478 ops->var.xoffset = 0;
1479 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1480 ops->var.vmode &= ~FB_VMODE_YWRAP;
1481 ops->update_start(info);
1482 fbcon_clear_margins(vc, 1);
1483 scrollback_max += count;
1484 if (scrollback_max > scrollback_phys_max)
1485 scrollback_max = scrollback_phys_max;
1486 scrollback_current = 0;
1487 }
1488
1489 static __inline__ void ypan_down(struct vc_data *vc, int count)
1490 {
1491 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1492 struct display *p = &fb_display[vc->vc_num];
1493 struct fbcon_ops *ops = info->fbcon_par;
1494
1495 p->yscroll -= count;
1496 if (p->yscroll < 0) {
1497 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1498 0, vc->vc_rows, vc->vc_cols);
1499 p->yscroll += p->vrows - vc->vc_rows;
1500 }
1501
1502 ops->var.xoffset = 0;
1503 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1504 ops->var.vmode &= ~FB_VMODE_YWRAP;
1505 ops->update_start(info);
1506 fbcon_clear_margins(vc, 1);
1507 scrollback_max -= count;
1508 if (scrollback_max < 0)
1509 scrollback_max = 0;
1510 scrollback_current = 0;
1511 }
1512
1513 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1514 {
1515 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1516 struct fbcon_ops *ops = info->fbcon_par;
1517 struct display *p = &fb_display[vc->vc_num];
1518
1519 p->yscroll -= count;
1520
1521 if (p->yscroll < 0) {
1522 p->yscroll += p->vrows - vc->vc_rows;
1523 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1524 }
1525
1526 ops->var.xoffset = 0;
1527 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1528 ops->var.vmode &= ~FB_VMODE_YWRAP;
1529 ops->update_start(info);
1530 fbcon_clear_margins(vc, 1);
1531 scrollback_max -= count;
1532 if (scrollback_max < 0)
1533 scrollback_max = 0;
1534 scrollback_current = 0;
1535 }
1536
1537 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1538 long delta)
1539 {
1540 int count = vc->vc_rows;
1541 unsigned short *d, *s;
1542 unsigned long n;
1543 int line = 0;
1544
1545 d = (u16 *) softback_curr;
1546 if (d == (u16 *) softback_in)
1547 d = (u16 *) vc->vc_origin;
1548 n = softback_curr + delta * vc->vc_size_row;
1549 softback_lines -= delta;
1550 if (delta < 0) {
1551 if (softback_curr < softback_top && n < softback_buf) {
1552 n += softback_end - softback_buf;
1553 if (n < softback_top) {
1554 softback_lines -=
1555 (softback_top - n) / vc->vc_size_row;
1556 n = softback_top;
1557 }
1558 } else if (softback_curr >= softback_top
1559 && n < softback_top) {
1560 softback_lines -=
1561 (softback_top - n) / vc->vc_size_row;
1562 n = softback_top;
1563 }
1564 } else {
1565 if (softback_curr > softback_in && n >= softback_end) {
1566 n += softback_buf - softback_end;
1567 if (n > softback_in) {
1568 n = softback_in;
1569 softback_lines = 0;
1570 }
1571 } else if (softback_curr <= softback_in && n > softback_in) {
1572 n = softback_in;
1573 softback_lines = 0;
1574 }
1575 }
1576 if (n == softback_curr)
1577 return;
1578 softback_curr = n;
1579 s = (u16 *) softback_curr;
1580 if (s == (u16 *) softback_in)
1581 s = (u16 *) vc->vc_origin;
1582 while (count--) {
1583 unsigned short *start;
1584 unsigned short *le;
1585 unsigned short c;
1586 int x = 0;
1587 unsigned short attr = 1;
1588
1589 start = s;
1590 le = advance_row(s, 1);
1591 do {
1592 c = scr_readw(s);
1593 if (attr != (c & 0xff00)) {
1594 attr = c & 0xff00;
1595 if (s > start) {
1596 fbcon_putcs(vc, start, s - start,
1597 line, x);
1598 x += s - start;
1599 start = s;
1600 }
1601 }
1602 if (c == scr_readw(d)) {
1603 if (s > start) {
1604 fbcon_putcs(vc, start, s - start,
1605 line, x);
1606 x += s - start + 1;
1607 start = s + 1;
1608 } else {
1609 x++;
1610 start++;
1611 }
1612 }
1613 s++;
1614 d++;
1615 } while (s < le);
1616 if (s > start)
1617 fbcon_putcs(vc, start, s - start, line, x);
1618 line++;
1619 if (d == (u16 *) softback_end)
1620 d = (u16 *) softback_buf;
1621 if (d == (u16 *) softback_in)
1622 d = (u16 *) vc->vc_origin;
1623 if (s == (u16 *) softback_end)
1624 s = (u16 *) softback_buf;
1625 if (s == (u16 *) softback_in)
1626 s = (u16 *) vc->vc_origin;
1627 }
1628 }
1629
1630 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1631 int line, int count, int dy)
1632 {
1633 unsigned short *s = (unsigned short *)
1634 (vc->vc_origin + vc->vc_size_row * line);
1635
1636 while (count--) {
1637 unsigned short *start = s;
1638 unsigned short *le = advance_row(s, 1);
1639 unsigned short c;
1640 int x = 0;
1641 unsigned short attr = 1;
1642
1643 do {
1644 c = scr_readw(s);
1645 if (attr != (c & 0xff00)) {
1646 attr = c & 0xff00;
1647 if (s > start) {
1648 fbcon_putcs(vc, start, s - start,
1649 dy, x);
1650 x += s - start;
1651 start = s;
1652 }
1653 }
1654 console_conditional_schedule();
1655 s++;
1656 } while (s < le);
1657 if (s > start)
1658 fbcon_putcs(vc, start, s - start, dy, x);
1659 console_conditional_schedule();
1660 dy++;
1661 }
1662 }
1663
1664 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1665 struct display *p, int line, int count, int ycount)
1666 {
1667 int offset = ycount * vc->vc_cols;
1668 unsigned short *d = (unsigned short *)
1669 (vc->vc_origin + vc->vc_size_row * line);
1670 unsigned short *s = d + offset;
1671 struct fbcon_ops *ops = info->fbcon_par;
1672
1673 while (count--) {
1674 unsigned short *start = s;
1675 unsigned short *le = advance_row(s, 1);
1676 unsigned short c;
1677 int x = 0;
1678
1679 do {
1680 c = scr_readw(s);
1681
1682 if (c == scr_readw(d)) {
1683 if (s > start) {
1684 ops->bmove(vc, info, line + ycount, x,
1685 line, x, 1, s-start);
1686 x += s - start + 1;
1687 start = s + 1;
1688 } else {
1689 x++;
1690 start++;
1691 }
1692 }
1693
1694 scr_writew(c, d);
1695 console_conditional_schedule();
1696 s++;
1697 d++;
1698 } while (s < le);
1699 if (s > start)
1700 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1701 s-start);
1702 console_conditional_schedule();
1703 if (ycount > 0)
1704 line++;
1705 else {
1706 line--;
1707 /* NOTE: We subtract two lines from these pointers */
1708 s -= vc->vc_size_row;
1709 d -= vc->vc_size_row;
1710 }
1711 }
1712 }
1713
1714 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1715 int line, int count, int offset)
1716 {
1717 unsigned short *d = (unsigned short *)
1718 (vc->vc_origin + vc->vc_size_row * line);
1719 unsigned short *s = d + offset;
1720
1721 while (count--) {
1722 unsigned short *start = s;
1723 unsigned short *le = advance_row(s, 1);
1724 unsigned short c;
1725 int x = 0;
1726 unsigned short attr = 1;
1727
1728 do {
1729 c = scr_readw(s);
1730 if (attr != (c & 0xff00)) {
1731 attr = c & 0xff00;
1732 if (s > start) {
1733 fbcon_putcs(vc, start, s - start,
1734 line, x);
1735 x += s - start;
1736 start = s;
1737 }
1738 }
1739 if (c == scr_readw(d)) {
1740 if (s > start) {
1741 fbcon_putcs(vc, start, s - start,
1742 line, x);
1743 x += s - start + 1;
1744 start = s + 1;
1745 } else {
1746 x++;
1747 start++;
1748 }
1749 }
1750 scr_writew(c, d);
1751 console_conditional_schedule();
1752 s++;
1753 d++;
1754 } while (s < le);
1755 if (s > start)
1756 fbcon_putcs(vc, start, s - start, line, x);
1757 console_conditional_schedule();
1758 if (offset > 0)
1759 line++;
1760 else {
1761 line--;
1762 /* NOTE: We subtract two lines from these pointers */
1763 s -= vc->vc_size_row;
1764 d -= vc->vc_size_row;
1765 }
1766 }
1767 }
1768
1769 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1770 int count)
1771 {
1772 unsigned short *p;
1773
1774 if (vc->vc_num != fg_console)
1775 return;
1776 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1777
1778 while (count) {
1779 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1780 count--;
1781 p = advance_row(p, 1);
1782 softback_in += vc->vc_size_row;
1783 if (softback_in == softback_end)
1784 softback_in = softback_buf;
1785 if (softback_in == softback_top) {
1786 softback_top += vc->vc_size_row;
1787 if (softback_top == softback_end)
1788 softback_top = softback_buf;
1789 }
1790 }
1791 softback_curr = softback_in;
1792 }
1793
1794 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1795 int count)
1796 {
1797 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1798 struct display *p = &fb_display[vc->vc_num];
1799 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1800
1801 if (fbcon_is_inactive(vc, info))
1802 return -EINVAL;
1803
1804 fbcon_cursor(vc, CM_ERASE);
1805
1806 /*
1807 * ++Geert: Only use ywrap/ypan if the console is in text mode
1808 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1809 * whole screen (prevents flicker).
1810 */
1811
1812 switch (dir) {
1813 case SM_UP:
1814 if (count > vc->vc_rows) /* Maximum realistic size */
1815 count = vc->vc_rows;
1816 if (softback_top)
1817 fbcon_softback_note(vc, t, count);
1818 if (logo_shown >= 0)
1819 goto redraw_up;
1820 switch (p->scrollmode) {
1821 case SCROLL_MOVE:
1822 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1823 count);
1824 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1825 scr_memsetw((unsigned short *) (vc->vc_origin +
1826 vc->vc_size_row *
1827 (b - count)),
1828 vc->vc_video_erase_char,
1829 vc->vc_size_row * count);
1830 return 1;
1831 break;
1832
1833 case SCROLL_WRAP_MOVE:
1834 if (b - t - count > 3 * vc->vc_rows >> 2) {
1835 if (t > 0)
1836 fbcon_bmove(vc, 0, 0, count, 0, t,
1837 vc->vc_cols);
1838 ywrap_up(vc, count);
1839 if (vc->vc_rows - b > 0)
1840 fbcon_bmove(vc, b - count, 0, b, 0,
1841 vc->vc_rows - b,
1842 vc->vc_cols);
1843 } else if (info->flags & FBINFO_READS_FAST)
1844 fbcon_bmove(vc, t + count, 0, t, 0,
1845 b - t - count, vc->vc_cols);
1846 else
1847 goto redraw_up;
1848 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1849 break;
1850
1851 case SCROLL_PAN_REDRAW:
1852 if ((p->yscroll + count <=
1853 2 * (p->vrows - vc->vc_rows))
1854 && ((!scroll_partial && (b - t == vc->vc_rows))
1855 || (scroll_partial
1856 && (b - t - count >
1857 3 * vc->vc_rows >> 2)))) {
1858 if (t > 0)
1859 fbcon_redraw_move(vc, p, 0, t, count);
1860 ypan_up_redraw(vc, t, count);
1861 if (vc->vc_rows - b > 0)
1862 fbcon_redraw_move(vc, p, b,
1863 vc->vc_rows - b, b);
1864 } else
1865 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1866 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1867 break;
1868
1869 case SCROLL_PAN_MOVE:
1870 if ((p->yscroll + count <=
1871 2 * (p->vrows - vc->vc_rows))
1872 && ((!scroll_partial && (b - t == vc->vc_rows))
1873 || (scroll_partial
1874 && (b - t - count >
1875 3 * vc->vc_rows >> 2)))) {
1876 if (t > 0)
1877 fbcon_bmove(vc, 0, 0, count, 0, t,
1878 vc->vc_cols);
1879 ypan_up(vc, count);
1880 if (vc->vc_rows - b > 0)
1881 fbcon_bmove(vc, b - count, 0, b, 0,
1882 vc->vc_rows - b,
1883 vc->vc_cols);
1884 } else if (info->flags & FBINFO_READS_FAST)
1885 fbcon_bmove(vc, t + count, 0, t, 0,
1886 b - t - count, vc->vc_cols);
1887 else
1888 goto redraw_up;
1889 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1890 break;
1891
1892 case SCROLL_REDRAW:
1893 redraw_up:
1894 fbcon_redraw(vc, p, t, b - t - count,
1895 count * vc->vc_cols);
1896 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1897 scr_memsetw((unsigned short *) (vc->vc_origin +
1898 vc->vc_size_row *
1899 (b - count)),
1900 vc->vc_video_erase_char,
1901 vc->vc_size_row * count);
1902 return 1;
1903 }
1904 break;
1905
1906 case SM_DOWN:
1907 if (count > vc->vc_rows) /* Maximum realistic size */
1908 count = vc->vc_rows;
1909 if (logo_shown >= 0)
1910 goto redraw_down;
1911 switch (p->scrollmode) {
1912 case SCROLL_MOVE:
1913 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1914 -count);
1915 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1916 scr_memsetw((unsigned short *) (vc->vc_origin +
1917 vc->vc_size_row *
1918 t),
1919 vc->vc_video_erase_char,
1920 vc->vc_size_row * count);
1921 return 1;
1922 break;
1923
1924 case SCROLL_WRAP_MOVE:
1925 if (b - t - count > 3 * vc->vc_rows >> 2) {
1926 if (vc->vc_rows - b > 0)
1927 fbcon_bmove(vc, b, 0, b - count, 0,
1928 vc->vc_rows - b,
1929 vc->vc_cols);
1930 ywrap_down(vc, count);
1931 if (t > 0)
1932 fbcon_bmove(vc, count, 0, 0, 0, t,
1933 vc->vc_cols);
1934 } else if (info->flags & FBINFO_READS_FAST)
1935 fbcon_bmove(vc, t, 0, t + count, 0,
1936 b - t - count, vc->vc_cols);
1937 else
1938 goto redraw_down;
1939 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1940 break;
1941
1942 case SCROLL_PAN_MOVE:
1943 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1944 && ((!scroll_partial && (b - t == vc->vc_rows))
1945 || (scroll_partial
1946 && (b - t - count >
1947 3 * vc->vc_rows >> 2)))) {
1948 if (vc->vc_rows - b > 0)
1949 fbcon_bmove(vc, b, 0, b - count, 0,
1950 vc->vc_rows - b,
1951 vc->vc_cols);
1952 ypan_down(vc, count);
1953 if (t > 0)
1954 fbcon_bmove(vc, count, 0, 0, 0, t,
1955 vc->vc_cols);
1956 } else if (info->flags & FBINFO_READS_FAST)
1957 fbcon_bmove(vc, t, 0, t + count, 0,
1958 b - t - count, vc->vc_cols);
1959 else
1960 goto redraw_down;
1961 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1962 break;
1963
1964 case SCROLL_PAN_REDRAW:
1965 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1966 && ((!scroll_partial && (b - t == vc->vc_rows))
1967 || (scroll_partial
1968 && (b - t - count >
1969 3 * vc->vc_rows >> 2)))) {
1970 if (vc->vc_rows - b > 0)
1971 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1972 b - count);
1973 ypan_down_redraw(vc, t, count);
1974 if (t > 0)
1975 fbcon_redraw_move(vc, p, count, t, 0);
1976 } else
1977 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1978 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1979 break;
1980
1981 case SCROLL_REDRAW:
1982 redraw_down:
1983 fbcon_redraw(vc, p, b - 1, b - t - count,
1984 -count * vc->vc_cols);
1985 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1986 scr_memsetw((unsigned short *) (vc->vc_origin +
1987 vc->vc_size_row *
1988 t),
1989 vc->vc_video_erase_char,
1990 vc->vc_size_row * count);
1991 return 1;
1992 }
1993 }
1994 return 0;
1995 }
1996
1997
1998 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1999 int height, int width)
2000 {
2001 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2002 struct display *p = &fb_display[vc->vc_num];
2003
2004 if (fbcon_is_inactive(vc, info))
2005 return;
2006
2007 if (!width || !height)
2008 return;
2009
2010 /* Split blits that cross physical y_wrap case.
2011 * Pathological case involves 4 blits, better to use recursive
2012 * code rather than unrolled case
2013 *
2014 * Recursive invocations don't need to erase the cursor over and
2015 * over again, so we use fbcon_bmove_rec()
2016 */
2017 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2018 p->vrows - p->yscroll);
2019 }
2020
2021 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2022 int dy, int dx, int height, int width, u_int y_break)
2023 {
2024 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2025 struct fbcon_ops *ops = info->fbcon_par;
2026 u_int b;
2027
2028 if (sy < y_break && sy + height > y_break) {
2029 b = y_break - sy;
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
2044 if (dy < y_break && dy + height > y_break) {
2045 b = y_break - dy;
2046 if (dy < sy) { /* Avoid trashing self */
2047 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2048 y_break);
2049 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2050 height - b, width, y_break);
2051 } else {
2052 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2053 height - b, width, y_break);
2054 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2055 y_break);
2056 }
2057 return;
2058 }
2059 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2060 height, width);
2061 }
2062
2063 static void updatescrollmode(struct display *p,
2064 struct fb_info *info,
2065 struct vc_data *vc)
2066 {
2067 struct fbcon_ops *ops = info->fbcon_par;
2068 int fh = vc->vc_font.height;
2069 int cap = info->flags;
2070 u16 t = 0;
2071 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2072 info->fix.xpanstep);
2073 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2074 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2075 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2076 info->var.xres_virtual);
2077 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2078 divides(ypan, vc->vc_font.height) && vyres > yres;
2079 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2080 divides(ywrap, vc->vc_font.height) &&
2081 divides(vc->vc_font.height, vyres) &&
2082 divides(vc->vc_font.height, yres);
2083 int reading_fast = cap & FBINFO_READS_FAST;
2084 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2085 !(cap & FBINFO_HWACCEL_DISABLED);
2086 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2087 !(cap & FBINFO_HWACCEL_DISABLED);
2088
2089 p->vrows = vyres/fh;
2090 if (yres > (fh * (vc->vc_rows + 1)))
2091 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2092 if ((yres % fh) && (vyres % fh < yres % fh))
2093 p->vrows--;
2094
2095 if (good_wrap || good_pan) {
2096 if (reading_fast || fast_copyarea)
2097 p->scrollmode = good_wrap ?
2098 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2099 else
2100 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2101 SCROLL_PAN_REDRAW;
2102 } else {
2103 if (reading_fast || (fast_copyarea && !fast_imageblit))
2104 p->scrollmode = SCROLL_MOVE;
2105 else
2106 p->scrollmode = SCROLL_REDRAW;
2107 }
2108 }
2109
2110 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2111 unsigned int height, unsigned int user)
2112 {
2113 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2114 struct fbcon_ops *ops = info->fbcon_par;
2115 struct display *p = &fb_display[vc->vc_num];
2116 struct fb_var_screeninfo var = info->var;
2117 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2118
2119 virt_w = FBCON_SWAP(ops->rotate, width, height);
2120 virt_h = FBCON_SWAP(ops->rotate, height, width);
2121 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2122 vc->vc_font.height);
2123 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2124 vc->vc_font.width);
2125 var.xres = virt_w * virt_fw;
2126 var.yres = virt_h * virt_fh;
2127 x_diff = info->var.xres - var.xres;
2128 y_diff = info->var.yres - var.yres;
2129 if (x_diff < 0 || x_diff > virt_fw ||
2130 y_diff < 0 || y_diff > virt_fh) {
2131 const struct fb_videomode *mode;
2132
2133 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2134 mode = fb_find_best_mode(&var, &info->modelist);
2135 if (mode == NULL)
2136 return -EINVAL;
2137 display_to_var(&var, p);
2138 fb_videomode_to_var(&var, mode);
2139
2140 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2141 return -EINVAL;
2142
2143 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2144 if (CON_IS_VISIBLE(vc)) {
2145 var.activate = FB_ACTIVATE_NOW |
2146 FB_ACTIVATE_FORCE;
2147 fb_set_var(info, &var);
2148 }
2149 var_to_display(p, &info->var, info);
2150 ops->var = info->var;
2151 }
2152 updatescrollmode(p, info, vc);
2153 return 0;
2154 }
2155
2156 static int fbcon_switch(struct vc_data *vc)
2157 {
2158 struct fb_info *info, *old_info = NULL;
2159 struct fbcon_ops *ops;
2160 struct display *p = &fb_display[vc->vc_num];
2161 struct fb_var_screeninfo var;
2162 int i, ret, prev_console, charcnt = 256;
2163
2164 info = registered_fb[con2fb_map[vc->vc_num]];
2165 ops = info->fbcon_par;
2166
2167 if (softback_top) {
2168 if (softback_lines)
2169 fbcon_set_origin(vc);
2170 softback_top = softback_curr = softback_in = softback_buf;
2171 softback_lines = 0;
2172 fbcon_update_softback(vc);
2173 }
2174
2175 if (logo_shown >= 0) {
2176 struct vc_data *conp2 = vc_cons[logo_shown].d;
2177
2178 if (conp2->vc_top == logo_lines
2179 && conp2->vc_bottom == conp2->vc_rows)
2180 conp2->vc_top = 0;
2181 logo_shown = FBCON_LOGO_CANSHOW;
2182 }
2183
2184 prev_console = ops->currcon;
2185 if (prev_console != -1)
2186 old_info = registered_fb[con2fb_map[prev_console]];
2187 /*
2188 * FIXME: If we have multiple fbdev's loaded, we need to
2189 * update all info->currcon. Perhaps, we can place this
2190 * in a centralized structure, but this might break some
2191 * drivers.
2192 *
2193 * info->currcon = vc->vc_num;
2194 */
2195 for (i = 0; i < FB_MAX; i++) {
2196 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2197 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2198
2199 o->currcon = vc->vc_num;
2200 }
2201 }
2202 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2203 display_to_var(&var, p);
2204 var.activate = FB_ACTIVATE_NOW;
2205
2206 /*
2207 * make sure we don't unnecessarily trip the memcmp()
2208 * in fb_set_var()
2209 */
2210 info->var.activate = var.activate;
2211 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2212 fb_set_var(info, &var);
2213 ops->var = info->var;
2214
2215 if (old_info != NULL && (old_info != info ||
2216 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2217 if (info->fbops->fb_set_par) {
2218 ret = info->fbops->fb_set_par(info);
2219
2220 if (ret)
2221 printk(KERN_ERR "fbcon_switch: detected "
2222 "unhandled fb_set_par error, "
2223 "error code %d\n", ret);
2224 }
2225
2226 if (old_info != info)
2227 fbcon_del_cursor_timer(old_info);
2228 }
2229
2230 if (fbcon_is_inactive(vc, info) ||
2231 ops->blank_state != FB_BLANK_UNBLANK)
2232 fbcon_del_cursor_timer(info);
2233 else
2234 fbcon_add_cursor_timer(info);
2235
2236 set_blitting_type(vc, info);
2237 ops->cursor_reset = 1;
2238
2239 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2240 ops->rotate = FB_ROTATE_UR;
2241 set_blitting_type(vc, info);
2242 }
2243
2244 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2245 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2246
2247 if (p->userfont)
2248 charcnt = FNTCHARCNT(vc->vc_font.data);
2249
2250 if (charcnt > 256)
2251 vc->vc_complement_mask <<= 1;
2252
2253 updatescrollmode(p, info, vc);
2254
2255 switch (p->scrollmode) {
2256 case SCROLL_WRAP_MOVE:
2257 scrollback_phys_max = p->vrows - vc->vc_rows;
2258 break;
2259 case SCROLL_PAN_MOVE:
2260 case SCROLL_PAN_REDRAW:
2261 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2262 if (scrollback_phys_max < 0)
2263 scrollback_phys_max = 0;
2264 break;
2265 default:
2266 scrollback_phys_max = 0;
2267 break;
2268 }
2269
2270 scrollback_max = 0;
2271 scrollback_current = 0;
2272
2273 if (!fbcon_is_inactive(vc, info)) {
2274 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2275 ops->update_start(info);
2276 }
2277
2278 fbcon_set_palette(vc, color_table);
2279 fbcon_clear_margins(vc, 0);
2280
2281 if (logo_shown == FBCON_LOGO_DRAW) {
2282
2283 logo_shown = fg_console;
2284 /* This is protected above by initmem_freed */
2285 fb_show_logo(info, ops->rotate);
2286 update_region(vc,
2287 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2288 vc->vc_size_row * (vc->vc_bottom -
2289 vc->vc_top) / 2);
2290 return 0;
2291 }
2292 return 1;
2293 }
2294
2295 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2296 int blank)
2297 {
2298 struct fb_event event;
2299
2300 if (blank) {
2301 unsigned short charmask = vc->vc_hi_font_mask ?
2302 0x1ff : 0xff;
2303 unsigned short oldc;
2304
2305 oldc = vc->vc_video_erase_char;
2306 vc->vc_video_erase_char &= charmask;
2307 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2308 vc->vc_video_erase_char = oldc;
2309 }
2310
2311
2312 if (!lock_fb_info(info))
2313 return;
2314 event.info = info;
2315 event.data = &blank;
2316 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2317 unlock_fb_info(info);
2318 }
2319
2320 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2321 {
2322 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2323 struct fbcon_ops *ops = info->fbcon_par;
2324
2325 if (mode_switch) {
2326 struct fb_var_screeninfo var = info->var;
2327
2328 ops->graphics = 1;
2329
2330 if (!blank) {
2331 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2332 fb_set_var(info, &var);
2333 ops->graphics = 0;
2334 ops->var = info->var;
2335 }
2336 }
2337
2338 if (!fbcon_is_inactive(vc, info)) {
2339 if (ops->blank_state != blank) {
2340 ops->blank_state = blank;
2341 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2342 ops->cursor_flash = (!blank);
2343
2344 if (!(info->flags & FBINFO_MISC_USEREVENT))
2345 if (fb_blank(info, blank))
2346 fbcon_generic_blank(vc, info, blank);
2347 }
2348
2349 if (!blank)
2350 update_screen(vc);
2351 }
2352
2353 if (mode_switch || fbcon_is_inactive(vc, info) ||
2354 ops->blank_state != FB_BLANK_UNBLANK)
2355 fbcon_del_cursor_timer(info);
2356 else
2357 fbcon_add_cursor_timer(info);
2358
2359 return 0;
2360 }
2361
2362 static int fbcon_debug_enter(struct vc_data *vc)
2363 {
2364 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2365 struct fbcon_ops *ops = info->fbcon_par;
2366
2367 ops->save_graphics = ops->graphics;
2368 ops->graphics = 0;
2369 if (info->fbops->fb_debug_enter)
2370 info->fbops->fb_debug_enter(info);
2371 fbcon_set_palette(vc, color_table);
2372 return 0;
2373 }
2374
2375 static int fbcon_debug_leave(struct vc_data *vc)
2376 {
2377 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2378 struct fbcon_ops *ops = info->fbcon_par;
2379
2380 ops->graphics = ops->save_graphics;
2381 if (info->fbops->fb_debug_leave)
2382 info->fbops->fb_debug_leave(info);
2383 return 0;
2384 }
2385
2386 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2387 {
2388 u8 *fontdata = vc->vc_font.data;
2389 u8 *data = font->data;
2390 int i, j;
2391
2392 font->width = vc->vc_font.width;
2393 font->height = vc->vc_font.height;
2394 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2395 if (!font->data)
2396 return 0;
2397
2398 if (font->width <= 8) {
2399 j = vc->vc_font.height;
2400 for (i = 0; i < font->charcount; i++) {
2401 memcpy(data, fontdata, j);
2402 memset(data + j, 0, 32 - j);
2403 data += 32;
2404 fontdata += j;
2405 }
2406 } else if (font->width <= 16) {
2407 j = vc->vc_font.height * 2;
2408 for (i = 0; i < font->charcount; i++) {
2409 memcpy(data, fontdata, j);
2410 memset(data + j, 0, 64 - j);
2411 data += 64;
2412 fontdata += j;
2413 }
2414 } else if (font->width <= 24) {
2415 for (i = 0; i < font->charcount; i++) {
2416 for (j = 0; j < vc->vc_font.height; j++) {
2417 *data++ = fontdata[0];
2418 *data++ = fontdata[1];
2419 *data++ = fontdata[2];
2420 fontdata += sizeof(u32);
2421 }
2422 memset(data, 0, 3 * (32 - j));
2423 data += 3 * (32 - j);
2424 }
2425 } else {
2426 j = vc->vc_font.height * 4;
2427 for (i = 0; i < font->charcount; i++) {
2428 memcpy(data, fontdata, j);
2429 memset(data + j, 0, 128 - j);
2430 data += 128;
2431 fontdata += j;
2432 }
2433 }
2434 return 0;
2435 }
2436
2437 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2438 const u8 * data, int userfont)
2439 {
2440 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2441 struct fbcon_ops *ops = info->fbcon_par;
2442 struct display *p = &fb_display[vc->vc_num];
2443 int resize;
2444 int cnt;
2445 char *old_data = NULL;
2446
2447 if (CON_IS_VISIBLE(vc) && softback_lines)
2448 fbcon_set_origin(vc);
2449
2450 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2451 if (p->userfont)
2452 old_data = vc->vc_font.data;
2453 if (userfont)
2454 cnt = FNTCHARCNT(data);
2455 else
2456 cnt = 256;
2457 vc->vc_font.data = (void *)(p->fontdata = data);
2458 if ((p->userfont = userfont))
2459 REFCOUNT(data)++;
2460 vc->vc_font.width = w;
2461 vc->vc_font.height = h;
2462 if (vc->vc_hi_font_mask && cnt == 256) {
2463 vc->vc_hi_font_mask = 0;
2464 if (vc->vc_can_do_color) {
2465 vc->vc_complement_mask >>= 1;
2466 vc->vc_s_complement_mask >>= 1;
2467 }
2468
2469 /* ++Edmund: reorder the attribute bits */
2470 if (vc->vc_can_do_color) {
2471 unsigned short *cp =
2472 (unsigned short *) vc->vc_origin;
2473 int count = vc->vc_screenbuf_size / 2;
2474 unsigned short c;
2475 for (; count > 0; count--, cp++) {
2476 c = scr_readw(cp);
2477 scr_writew(((c & 0xfe00) >> 1) |
2478 (c & 0xff), cp);
2479 }
2480 c = vc->vc_video_erase_char;
2481 vc->vc_video_erase_char =
2482 ((c & 0xfe00) >> 1) | (c & 0xff);
2483 vc->vc_attr >>= 1;
2484 }
2485 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2486 vc->vc_hi_font_mask = 0x100;
2487 if (vc->vc_can_do_color) {
2488 vc->vc_complement_mask <<= 1;
2489 vc->vc_s_complement_mask <<= 1;
2490 }
2491
2492 /* ++Edmund: reorder the attribute bits */
2493 {
2494 unsigned short *cp =
2495 (unsigned short *) vc->vc_origin;
2496 int count = vc->vc_screenbuf_size / 2;
2497 unsigned short c;
2498 for (; count > 0; count--, cp++) {
2499 unsigned short newc;
2500 c = scr_readw(cp);
2501 if (vc->vc_can_do_color)
2502 newc =
2503 ((c & 0xff00) << 1) | (c &
2504 0xff);
2505 else
2506 newc = c & ~0x100;
2507 scr_writew(newc, cp);
2508 }
2509 c = vc->vc_video_erase_char;
2510 if (vc->vc_can_do_color) {
2511 vc->vc_video_erase_char =
2512 ((c & 0xff00) << 1) | (c & 0xff);
2513 vc->vc_attr <<= 1;
2514 } else
2515 vc->vc_video_erase_char = c & ~0x100;
2516 }
2517
2518 }
2519
2520 if (resize) {
2521 int cols, rows;
2522
2523 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2524 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2525 cols /= w;
2526 rows /= h;
2527 vc_resize(vc, cols, rows);
2528 if (CON_IS_VISIBLE(vc) && softback_buf)
2529 fbcon_update_softback(vc);
2530 } else if (CON_IS_VISIBLE(vc)
2531 && vc->vc_mode == KD_TEXT) {
2532 fbcon_clear_margins(vc, 0);
2533 update_screen(vc);
2534 }
2535
2536 if (old_data && (--REFCOUNT(old_data) == 0))
2537 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2538 return 0;
2539 }
2540
2541 static int fbcon_copy_font(struct vc_data *vc, int con)
2542 {
2543 struct display *od = &fb_display[con];
2544 struct console_font *f = &vc->vc_font;
2545
2546 if (od->fontdata == f->data)
2547 return 0; /* already the same font... */
2548 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2549 }
2550
2551 /*
2552 * User asked to set font; we are guaranteed that
2553 * a) width and height are in range 1..32
2554 * b) charcount does not exceed 512
2555 * but lets not assume that, since someone might someday want to use larger
2556 * fonts. And charcount of 512 is small for unicode support.
2557 *
2558 * However, user space gives the font in 32 rows , regardless of
2559 * actual font height. So a new API is needed if support for larger fonts
2560 * is ever implemented.
2561 */
2562
2563 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2564 {
2565 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2566 unsigned charcount = font->charcount;
2567 int w = font->width;
2568 int h = font->height;
2569 int size;
2570 int i, csum;
2571 u8 *new_data, *data = font->data;
2572 int pitch = (font->width+7) >> 3;
2573
2574 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2575 * If not this check should be changed to charcount < 256 */
2576 if (charcount != 256 && charcount != 512)
2577 return -EINVAL;
2578
2579 /* Make sure drawing engine can handle the font */
2580 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2581 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2582 return -EINVAL;
2583
2584 /* Make sure driver can handle the font length */
2585 if (fbcon_invalid_charcount(info, charcount))
2586 return -EINVAL;
2587
2588 size = h * pitch * charcount;
2589
2590 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2591
2592 if (!new_data)
2593 return -ENOMEM;
2594
2595 new_data += FONT_EXTRA_WORDS * sizeof(int);
2596 FNTSIZE(new_data) = size;
2597 FNTCHARCNT(new_data) = charcount;
2598 REFCOUNT(new_data) = 0; /* usage counter */
2599 for (i=0; i< charcount; i++) {
2600 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2601 }
2602
2603 /* Since linux has a nice crc32 function use it for counting font
2604 * checksums. */
2605 csum = crc32(0, new_data, size);
2606
2607 FNTSUM(new_data) = csum;
2608 /* Check if the same font is on some other console already */
2609 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2610 struct vc_data *tmp = vc_cons[i].d;
2611
2612 if (fb_display[i].userfont &&
2613 fb_display[i].fontdata &&
2614 FNTSUM(fb_display[i].fontdata) == csum &&
2615 FNTSIZE(fb_display[i].fontdata) == size &&
2616 tmp->vc_font.width == w &&
2617 !memcmp(fb_display[i].fontdata, new_data, size)) {
2618 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2619 new_data = (u8 *)fb_display[i].fontdata;
2620 break;
2621 }
2622 }
2623 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2624 }
2625
2626 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2627 {
2628 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2629 const struct font_desc *f;
2630
2631 if (!name)
2632 f = get_default_font(info->var.xres, info->var.yres,
2633 info->pixmap.blit_x, info->pixmap.blit_y);
2634 else if (!(f = find_font(name)))
2635 return -ENOENT;
2636
2637 font->width = f->width;
2638 font->height = f->height;
2639 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2640 }
2641
2642 static u16 palette_red[16];
2643 static u16 palette_green[16];
2644 static u16 palette_blue[16];
2645
2646 static struct fb_cmap palette_cmap = {
2647 0, 16, palette_red, palette_green, palette_blue, NULL
2648 };
2649
2650 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2651 {
2652 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2653 int i, j, k, depth;
2654 u8 val;
2655
2656 if (fbcon_is_inactive(vc, info))
2657 return -EINVAL;
2658
2659 if (!CON_IS_VISIBLE(vc))
2660 return 0;
2661
2662 depth = fb_get_color_depth(&info->var, &info->fix);
2663 if (depth > 3) {
2664 for (i = j = 0; i < 16; i++) {
2665 k = table[i];
2666 val = vc->vc_palette[j++];
2667 palette_red[k] = (val << 8) | val;
2668 val = vc->vc_palette[j++];
2669 palette_green[k] = (val << 8) | val;
2670 val = vc->vc_palette[j++];
2671 palette_blue[k] = (val << 8) | val;
2672 }
2673 palette_cmap.len = 16;
2674 palette_cmap.start = 0;
2675 /*
2676 * If framebuffer is capable of less than 16 colors,
2677 * use default palette of fbcon.
2678 */
2679 } else
2680 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2681
2682 return fb_set_cmap(&palette_cmap, info);
2683 }
2684
2685 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2686 {
2687 unsigned long p;
2688 int line;
2689
2690 if (vc->vc_num != fg_console || !softback_lines)
2691 return (u16 *) (vc->vc_origin + offset);
2692 line = offset / vc->vc_size_row;
2693 if (line >= softback_lines)
2694 return (u16 *) (vc->vc_origin + offset -
2695 softback_lines * vc->vc_size_row);
2696 p = softback_curr + offset;
2697 if (p >= softback_end)
2698 p += softback_buf - softback_end;
2699 return (u16 *) p;
2700 }
2701
2702 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2703 int *px, int *py)
2704 {
2705 unsigned long ret;
2706 int x, y;
2707
2708 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2709 unsigned long offset = (pos - vc->vc_origin) / 2;
2710
2711 x = offset % vc->vc_cols;
2712 y = offset / vc->vc_cols;
2713 if (vc->vc_num == fg_console)
2714 y += softback_lines;
2715 ret = pos + (vc->vc_cols - x) * 2;
2716 } else if (vc->vc_num == fg_console && softback_lines) {
2717 unsigned long offset = pos - softback_curr;
2718
2719 if (pos < softback_curr)
2720 offset += softback_end - softback_buf;
2721 offset /= 2;
2722 x = offset % vc->vc_cols;
2723 y = offset / vc->vc_cols;
2724 ret = pos + (vc->vc_cols - x) * 2;
2725 if (ret == softback_end)
2726 ret = softback_buf;
2727 if (ret == softback_in)
2728 ret = vc->vc_origin;
2729 } else {
2730 /* Should not happen */
2731 x = y = 0;
2732 ret = vc->vc_origin;
2733 }
2734 if (px)
2735 *px = x;
2736 if (py)
2737 *py = y;
2738 return ret;
2739 }
2740
2741 /* As we might be inside of softback, we may work with non-contiguous buffer,
2742 that's why we have to use a separate routine. */
2743 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2744 {
2745 while (cnt--) {
2746 u16 a = scr_readw(p);
2747 if (!vc->vc_can_do_color)
2748 a ^= 0x0800;
2749 else if (vc->vc_hi_font_mask == 0x100)
2750 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2751 (((a) & 0x0e00) << 4);
2752 else
2753 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2754 (((a) & 0x0700) << 4);
2755 scr_writew(a, p++);
2756 if (p == (u16 *) softback_end)
2757 p = (u16 *) softback_buf;
2758 if (p == (u16 *) softback_in)
2759 p = (u16 *) vc->vc_origin;
2760 }
2761 }
2762
2763 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2764 {
2765 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2766 struct fbcon_ops *ops = info->fbcon_par;
2767 struct display *disp = &fb_display[fg_console];
2768 int offset, limit, scrollback_old;
2769
2770 if (softback_top) {
2771 if (vc->vc_num != fg_console)
2772 return 0;
2773 if (vc->vc_mode != KD_TEXT || !lines)
2774 return 0;
2775 if (logo_shown >= 0) {
2776 struct vc_data *conp2 = vc_cons[logo_shown].d;
2777
2778 if (conp2->vc_top == logo_lines
2779 && conp2->vc_bottom == conp2->vc_rows)
2780 conp2->vc_top = 0;
2781 if (logo_shown == vc->vc_num) {
2782 unsigned long p, q;
2783 int i;
2784
2785 p = softback_in;
2786 q = vc->vc_origin +
2787 logo_lines * vc->vc_size_row;
2788 for (i = 0; i < logo_lines; i++) {
2789 if (p == softback_top)
2790 break;
2791 if (p == softback_buf)
2792 p = softback_end;
2793 p -= vc->vc_size_row;
2794 q -= vc->vc_size_row;
2795 scr_memcpyw((u16 *) q, (u16 *) p,
2796 vc->vc_size_row);
2797 }
2798 softback_in = softback_curr = p;
2799 update_region(vc, vc->vc_origin,
2800 logo_lines * vc->vc_cols);
2801 }
2802 logo_shown = FBCON_LOGO_CANSHOW;
2803 }
2804 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2805 fbcon_redraw_softback(vc, disp, lines);
2806 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2807 return 0;
2808 }
2809
2810 if (!scrollback_phys_max)
2811 return -ENOSYS;
2812
2813 scrollback_old = scrollback_current;
2814 scrollback_current -= lines;
2815 if (scrollback_current < 0)
2816 scrollback_current = 0;
2817 else if (scrollback_current > scrollback_max)
2818 scrollback_current = scrollback_max;
2819 if (scrollback_current == scrollback_old)
2820 return 0;
2821
2822 if (fbcon_is_inactive(vc, info))
2823 return 0;
2824
2825 fbcon_cursor(vc, CM_ERASE);
2826
2827 offset = disp->yscroll - scrollback_current;
2828 limit = disp->vrows;
2829 switch (disp->scrollmode) {
2830 case SCROLL_WRAP_MOVE:
2831 info->var.vmode |= FB_VMODE_YWRAP;
2832 break;
2833 case SCROLL_PAN_MOVE:
2834 case SCROLL_PAN_REDRAW:
2835 limit -= vc->vc_rows;
2836 info->var.vmode &= ~FB_VMODE_YWRAP;
2837 break;
2838 }
2839 if (offset < 0)
2840 offset += limit;
2841 else if (offset >= limit)
2842 offset -= limit;
2843
2844 ops->var.xoffset = 0;
2845 ops->var.yoffset = offset * vc->vc_font.height;
2846 ops->update_start(info);
2847
2848 if (!scrollback_current)
2849 fbcon_cursor(vc, CM_DRAW);
2850 return 0;
2851 }
2852
2853 static int fbcon_set_origin(struct vc_data *vc)
2854 {
2855 if (softback_lines)
2856 fbcon_scrolldelta(vc, softback_lines);
2857 return 0;
2858 }
2859
2860 static void fbcon_suspended(struct fb_info *info)
2861 {
2862 struct vc_data *vc = NULL;
2863 struct fbcon_ops *ops = info->fbcon_par;
2864
2865 if (!ops || ops->currcon < 0)
2866 return;
2867 vc = vc_cons[ops->currcon].d;
2868
2869 /* Clear cursor, restore saved data */
2870 fbcon_cursor(vc, CM_ERASE);
2871 }
2872
2873 static void fbcon_resumed(struct fb_info *info)
2874 {
2875 struct vc_data *vc;
2876 struct fbcon_ops *ops = info->fbcon_par;
2877
2878 if (!ops || ops->currcon < 0)
2879 return;
2880 vc = vc_cons[ops->currcon].d;
2881
2882 update_screen(vc);
2883 }
2884
2885 static void fbcon_modechanged(struct fb_info *info)
2886 {
2887 struct fbcon_ops *ops = info->fbcon_par;
2888 struct vc_data *vc;
2889 struct display *p;
2890 int rows, cols;
2891
2892 if (!ops || ops->currcon < 0)
2893 return;
2894 vc = vc_cons[ops->currcon].d;
2895 if (vc->vc_mode != KD_TEXT ||
2896 registered_fb[con2fb_map[ops->currcon]] != info)
2897 return;
2898
2899 p = &fb_display[vc->vc_num];
2900 set_blitting_type(vc, info);
2901
2902 if (CON_IS_VISIBLE(vc)) {
2903 var_to_display(p, &info->var, info);
2904 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2905 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2906 cols /= vc->vc_font.width;
2907 rows /= vc->vc_font.height;
2908 vc_resize(vc, cols, rows);
2909 updatescrollmode(p, info, vc);
2910 scrollback_max = 0;
2911 scrollback_current = 0;
2912
2913 if (!fbcon_is_inactive(vc, info)) {
2914 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2915 ops->update_start(info);
2916 }
2917
2918 fbcon_set_palette(vc, color_table);
2919 update_screen(vc);
2920 if (softback_buf)
2921 fbcon_update_softback(vc);
2922 }
2923 }
2924
2925 static void fbcon_set_all_vcs(struct fb_info *info)
2926 {
2927 struct fbcon_ops *ops = info->fbcon_par;
2928 struct vc_data *vc;
2929 struct display *p;
2930 int i, rows, cols, fg = -1;
2931
2932 if (!ops || ops->currcon < 0)
2933 return;
2934
2935 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2936 vc = vc_cons[i].d;
2937 if (!vc || vc->vc_mode != KD_TEXT ||
2938 registered_fb[con2fb_map[i]] != info)
2939 continue;
2940
2941 if (CON_IS_VISIBLE(vc)) {
2942 fg = i;
2943 continue;
2944 }
2945
2946 p = &fb_display[vc->vc_num];
2947 set_blitting_type(vc, info);
2948 var_to_display(p, &info->var, info);
2949 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2950 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2951 cols /= vc->vc_font.width;
2952 rows /= vc->vc_font.height;
2953 vc_resize(vc, cols, rows);
2954 }
2955
2956 if (fg != -1)
2957 fbcon_modechanged(info);
2958 }
2959
2960 static int fbcon_mode_deleted(struct fb_info *info,
2961 struct fb_videomode *mode)
2962 {
2963 struct fb_info *fb_info;
2964 struct display *p;
2965 int i, j, found = 0;
2966
2967 /* before deletion, ensure that mode is not in use */
2968 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2969 j = con2fb_map[i];
2970 if (j == -1)
2971 continue;
2972 fb_info = registered_fb[j];
2973 if (fb_info != info)
2974 continue;
2975 p = &fb_display[i];
2976 if (!p || !p->mode)
2977 continue;
2978 if (fb_mode_is_equal(p->mode, mode)) {
2979 found = 1;
2980 break;
2981 }
2982 }
2983 return found;
2984 }
2985
2986 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2987 static int fbcon_unbind(void)
2988 {
2989 int ret;
2990
2991 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2992 fbcon_is_default);
2993
2994 if (!ret)
2995 fbcon_has_console_bind = 0;
2996
2997 return ret;
2998 }
2999 #else
3000 static inline int fbcon_unbind(void)
3001 {
3002 return -EINVAL;
3003 }
3004 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3005
3006 /* called with console_lock held */
3007 static int fbcon_fb_unbind(int idx)
3008 {
3009 int i, new_idx = -1, ret = 0;
3010
3011 if (!fbcon_has_console_bind)
3012 return 0;
3013
3014 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3015 if (con2fb_map[i] != idx &&
3016 con2fb_map[i] != -1) {
3017 new_idx = i;
3018 break;
3019 }
3020 }
3021
3022 if (new_idx != -1) {
3023 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3024 if (con2fb_map[i] == idx)
3025 set_con2fb_map(i, new_idx, 0);
3026 }
3027 } else {
3028 struct fb_info *info = registered_fb[idx];
3029
3030 /* This is sort of like set_con2fb_map, except it maps
3031 * the consoles to no device and then releases the
3032 * oldinfo to free memory and cancel the cursor blink
3033 * timer. I can imagine this just becoming part of
3034 * set_con2fb_map where new_idx is -1
3035 */
3036 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3037 if (con2fb_map[i] == idx) {
3038 con2fb_map[i] = -1;
3039 if (!search_fb_in_map(idx)) {
3040 ret = con2fb_release_oldinfo(vc_cons[i].d,
3041 info, NULL, i,
3042 idx, 0);
3043 if (ret) {
3044 con2fb_map[i] = idx;
3045 return ret;
3046 }
3047 }
3048 }
3049 }
3050 ret = fbcon_unbind();
3051 }
3052
3053 return ret;
3054 }
3055
3056 /* called with console_lock held */
3057 static int fbcon_fb_unregistered(struct fb_info *info)
3058 {
3059 int i, idx;
3060
3061 idx = info->node;
3062 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3063 if (con2fb_map[i] == idx)
3064 con2fb_map[i] = -1;
3065 }
3066
3067 if (idx == info_idx) {
3068 info_idx = -1;
3069
3070 for (i = 0; i < FB_MAX; i++) {
3071 if (registered_fb[i] != NULL) {
3072 info_idx = i;
3073 break;
3074 }
3075 }
3076 }
3077
3078 if (info_idx != -1) {
3079 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3080 if (con2fb_map[i] == -1)
3081 con2fb_map[i] = info_idx;
3082 }
3083 }
3084
3085 if (primary_device == idx)
3086 primary_device = -1;
3087
3088 if (!num_registered_fb)
3089 do_unregister_con_driver(&fb_con);
3090
3091 return 0;
3092 }
3093
3094 /* called with console_lock held */
3095 static void fbcon_remap_all(int idx)
3096 {
3097 int i;
3098 for (i = first_fb_vc; i <= last_fb_vc; i++)
3099 set_con2fb_map(i, idx, 0);
3100
3101 if (con_is_bound(&fb_con)) {
3102 printk(KERN_INFO "fbcon: Remapping primary device, "
3103 "fb%i, to tty %i-%i\n", idx,
3104 first_fb_vc + 1, last_fb_vc + 1);
3105 info_idx = idx;
3106 }
3107 }
3108
3109 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3110 static void fbcon_select_primary(struct fb_info *info)
3111 {
3112 if (!map_override && primary_device == -1 &&
3113 fb_is_primary_device(info)) {
3114 int i;
3115
3116 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3117 info->fix.id, info->node);
3118 primary_device = info->node;
3119
3120 for (i = first_fb_vc; i <= last_fb_vc; i++)
3121 con2fb_map_boot[i] = primary_device;
3122
3123 if (con_is_bound(&fb_con)) {
3124 printk(KERN_INFO "fbcon: Remapping primary device, "
3125 "fb%i, to tty %i-%i\n", info->node,
3126 first_fb_vc + 1, last_fb_vc + 1);
3127 info_idx = primary_device;
3128 }
3129 }
3130
3131 }
3132 #else
3133 static inline void fbcon_select_primary(struct fb_info *info)
3134 {
3135 return;
3136 }
3137 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3138
3139 /* called with console_lock held */
3140 static int fbcon_fb_registered(struct fb_info *info)
3141 {
3142 int ret = 0, i, idx;
3143
3144 idx = info->node;
3145 fbcon_select_primary(info);
3146
3147 if (info_idx == -1) {
3148 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3149 if (con2fb_map_boot[i] == idx) {
3150 info_idx = idx;
3151 break;
3152 }
3153 }
3154
3155 if (info_idx != -1)
3156 ret = do_fbcon_takeover(1);
3157 } else {
3158 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3159 if (con2fb_map_boot[i] == idx)
3160 set_con2fb_map(i, idx, 0);
3161 }
3162 }
3163
3164 return ret;
3165 }
3166
3167 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3168 {
3169 struct fbcon_ops *ops = info->fbcon_par;
3170 struct vc_data *vc;
3171
3172 if (!ops || ops->currcon < 0)
3173 return;
3174
3175 vc = vc_cons[ops->currcon].d;
3176 if (vc->vc_mode != KD_TEXT ||
3177 registered_fb[con2fb_map[ops->currcon]] != info)
3178 return;
3179
3180 if (CON_IS_VISIBLE(vc)) {
3181 if (blank)
3182 do_blank_screen(0);
3183 else
3184 do_unblank_screen(0);
3185 }
3186 ops->blank_state = blank;
3187 }
3188
3189 static void fbcon_new_modelist(struct fb_info *info)
3190 {
3191 int i;
3192 struct vc_data *vc;
3193 struct fb_var_screeninfo var;
3194 const struct fb_videomode *mode;
3195
3196 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3197 if (registered_fb[con2fb_map[i]] != info)
3198 continue;
3199 if (!fb_display[i].mode)
3200 continue;
3201 vc = vc_cons[i].d;
3202 display_to_var(&var, &fb_display[i]);
3203 mode = fb_find_nearest_mode(fb_display[i].mode,
3204 &info->modelist);
3205 fb_videomode_to_var(&var, mode);
3206 fbcon_set_disp(info, &var, vc->vc_num);
3207 }
3208 }
3209
3210 static void fbcon_get_requirement(struct fb_info *info,
3211 struct fb_blit_caps *caps)
3212 {
3213 struct vc_data *vc;
3214 struct display *p;
3215
3216 if (caps->flags) {
3217 int i, charcnt;
3218
3219 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3220 vc = vc_cons[i].d;
3221 if (vc && vc->vc_mode == KD_TEXT &&
3222 info->node == con2fb_map[i]) {
3223 p = &fb_display[i];
3224 caps->x |= 1 << (vc->vc_font.width - 1);
3225 caps->y |= 1 << (vc->vc_font.height - 1);
3226 charcnt = (p->userfont) ?
3227 FNTCHARCNT(p->fontdata) : 256;
3228 if (caps->len < charcnt)
3229 caps->len = charcnt;
3230 }
3231 }
3232 } else {
3233 vc = vc_cons[fg_console].d;
3234
3235 if (vc && vc->vc_mode == KD_TEXT &&
3236 info->node == con2fb_map[fg_console]) {
3237 p = &fb_display[fg_console];
3238 caps->x = 1 << (vc->vc_font.width - 1);
3239 caps->y = 1 << (vc->vc_font.height - 1);
3240 caps->len = (p->userfont) ?
3241 FNTCHARCNT(p->fontdata) : 256;
3242 }
3243 }
3244 }
3245
3246 static int fbcon_event_notify(struct notifier_block *self,
3247 unsigned long action, void *data)
3248 {
3249 struct fb_event *event = data;
3250 struct fb_info *info = event->info;
3251 struct fb_videomode *mode;
3252 struct fb_con2fbmap *con2fb;
3253 struct fb_blit_caps *caps;
3254 int idx, ret = 0;
3255
3256 /*
3257 * ignore all events except driver registration and deregistration
3258 * if fbcon is not active
3259 */
3260 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3261 action == FB_EVENT_FB_UNREGISTERED))
3262 goto done;
3263
3264 switch(action) {
3265 case FB_EVENT_SUSPEND:
3266 fbcon_suspended(info);
3267 break;
3268 case FB_EVENT_RESUME:
3269 fbcon_resumed(info);
3270 break;
3271 case FB_EVENT_MODE_CHANGE:
3272 fbcon_modechanged(info);
3273 break;
3274 case FB_EVENT_MODE_CHANGE_ALL:
3275 fbcon_set_all_vcs(info);
3276 break;
3277 case FB_EVENT_MODE_DELETE:
3278 mode = event->data;
3279 ret = fbcon_mode_deleted(info, mode);
3280 break;
3281 case FB_EVENT_FB_UNBIND:
3282 idx = info->node;
3283 ret = fbcon_fb_unbind(idx);
3284 break;
3285 case FB_EVENT_FB_REGISTERED:
3286 ret = fbcon_fb_registered(info);
3287 break;
3288 case FB_EVENT_FB_UNREGISTERED:
3289 ret = fbcon_fb_unregistered(info);
3290 break;
3291 case FB_EVENT_SET_CONSOLE_MAP:
3292 /* called with console lock held */
3293 con2fb = event->data;
3294 ret = set_con2fb_map(con2fb->console - 1,
3295 con2fb->framebuffer, 1);
3296 break;
3297 case FB_EVENT_GET_CONSOLE_MAP:
3298 con2fb = event->data;
3299 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3300 break;
3301 case FB_EVENT_BLANK:
3302 fbcon_fb_blanked(info, *(int *)event->data);
3303 break;
3304 case FB_EVENT_NEW_MODELIST:
3305 fbcon_new_modelist(info);
3306 break;
3307 case FB_EVENT_GET_REQ:
3308 caps = event->data;
3309 fbcon_get_requirement(info, caps);
3310 break;
3311 case FB_EVENT_REMAP_ALL_CONSOLE:
3312 idx = info->node;
3313 fbcon_remap_all(idx);
3314 break;
3315 }
3316 done:
3317 return ret;
3318 }
3319
3320 /*
3321 * The console `switch' structure for the frame buffer based console
3322 */
3323
3324 static const struct consw fb_con = {
3325 .owner = THIS_MODULE,
3326 .con_startup = fbcon_startup,
3327 .con_init = fbcon_init,
3328 .con_deinit = fbcon_deinit,
3329 .con_clear = fbcon_clear,
3330 .con_putc = fbcon_putc,
3331 .con_putcs = fbcon_putcs,
3332 .con_cursor = fbcon_cursor,
3333 .con_scroll = fbcon_scroll,
3334 .con_bmove = fbcon_bmove,
3335 .con_switch = fbcon_switch,
3336 .con_blank = fbcon_blank,
3337 .con_font_set = fbcon_set_font,
3338 .con_font_get = fbcon_get_font,
3339 .con_font_default = fbcon_set_def_font,
3340 .con_font_copy = fbcon_copy_font,
3341 .con_set_palette = fbcon_set_palette,
3342 .con_scrolldelta = fbcon_scrolldelta,
3343 .con_set_origin = fbcon_set_origin,
3344 .con_invert_region = fbcon_invert_region,
3345 .con_screen_pos = fbcon_screen_pos,
3346 .con_getxy = fbcon_getxy,
3347 .con_resize = fbcon_resize,
3348 .con_debug_enter = fbcon_debug_enter,
3349 .con_debug_leave = fbcon_debug_leave,
3350 };
3351
3352 static struct notifier_block fbcon_event_notifier = {
3353 .notifier_call = fbcon_event_notify,
3354 };
3355
3356 static ssize_t store_rotate(struct device *device,
3357 struct device_attribute *attr, const char *buf,
3358 size_t count)
3359 {
3360 struct fb_info *info;
3361 int rotate, idx;
3362 char **last = NULL;
3363
3364 if (fbcon_has_exited)
3365 return count;
3366
3367 console_lock();
3368 idx = con2fb_map[fg_console];
3369
3370 if (idx == -1 || registered_fb[idx] == NULL)
3371 goto err;
3372
3373 info = registered_fb[idx];
3374 rotate = simple_strtoul(buf, last, 0);
3375 fbcon_rotate(info, rotate);
3376 err:
3377 console_unlock();
3378 return count;
3379 }
3380
3381 static ssize_t store_rotate_all(struct device *device,
3382 struct device_attribute *attr,const char *buf,
3383 size_t count)
3384 {
3385 struct fb_info *info;
3386 int rotate, idx;
3387 char **last = NULL;
3388
3389 if (fbcon_has_exited)
3390 return count;
3391
3392 console_lock();
3393 idx = con2fb_map[fg_console];
3394
3395 if (idx == -1 || registered_fb[idx] == NULL)
3396 goto err;
3397
3398 info = registered_fb[idx];
3399 rotate = simple_strtoul(buf, last, 0);
3400 fbcon_rotate_all(info, rotate);
3401 err:
3402 console_unlock();
3403 return count;
3404 }
3405
3406 static ssize_t show_rotate(struct device *device,
3407 struct device_attribute *attr,char *buf)
3408 {
3409 struct fb_info *info;
3410 int rotate = 0, idx;
3411
3412 if (fbcon_has_exited)
3413 return 0;
3414
3415 console_lock();
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 rotate = fbcon_get_rotate(info);
3423 err:
3424 console_unlock();
3425 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3426 }
3427
3428 static ssize_t show_cursor_blink(struct device *device,
3429 struct device_attribute *attr, char *buf)
3430 {
3431 struct fb_info *info;
3432 struct fbcon_ops *ops;
3433 int idx, blink = -1;
3434
3435 if (fbcon_has_exited)
3436 return 0;
3437
3438 console_lock();
3439 idx = con2fb_map[fg_console];
3440
3441 if (idx == -1 || registered_fb[idx] == NULL)
3442 goto err;
3443
3444 info = registered_fb[idx];
3445 ops = info->fbcon_par;
3446
3447 if (!ops)
3448 goto err;
3449
3450 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3451 err:
3452 console_unlock();
3453 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3454 }
3455
3456 static ssize_t store_cursor_blink(struct device *device,
3457 struct device_attribute *attr,
3458 const char *buf, size_t count)
3459 {
3460 struct fb_info *info;
3461 int blink, idx;
3462 char **last = NULL;
3463
3464 if (fbcon_has_exited)
3465 return count;
3466
3467 console_lock();
3468 idx = con2fb_map[fg_console];
3469
3470 if (idx == -1 || registered_fb[idx] == NULL)
3471 goto err;
3472
3473 info = registered_fb[idx];
3474
3475 if (!info->fbcon_par)
3476 goto err;
3477
3478 blink = simple_strtoul(buf, last, 0);
3479
3480 if (blink) {
3481 fbcon_cursor_noblink = 0;
3482 fbcon_add_cursor_timer(info);
3483 } else {
3484 fbcon_cursor_noblink = 1;
3485 fbcon_del_cursor_timer(info);
3486 }
3487
3488 err:
3489 console_unlock();
3490 return count;
3491 }
3492
3493 static struct device_attribute device_attrs[] = {
3494 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3495 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3496 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3497 store_cursor_blink),
3498 };
3499
3500 static int fbcon_init_device(void)
3501 {
3502 int i, error = 0;
3503
3504 fbcon_has_sysfs = 1;
3505
3506 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3507 error = device_create_file(fbcon_device, &device_attrs[i]);
3508
3509 if (error)
3510 break;
3511 }
3512
3513 if (error) {
3514 while (--i >= 0)
3515 device_remove_file(fbcon_device, &device_attrs[i]);
3516
3517 fbcon_has_sysfs = 0;
3518 }
3519
3520 return 0;
3521 }
3522
3523 static void fbcon_start(void)
3524 {
3525 if (num_registered_fb) {
3526 int i;
3527
3528 console_lock();
3529
3530 for (i = 0; i < FB_MAX; i++) {
3531 if (registered_fb[i] != NULL) {
3532 info_idx = i;
3533 break;
3534 }
3535 }
3536
3537 do_fbcon_takeover(0);
3538 console_unlock();
3539
3540 }
3541 }
3542
3543 static void fbcon_exit(void)
3544 {
3545 struct fb_info *info;
3546 int i, j, mapped;
3547
3548 if (fbcon_has_exited)
3549 return;
3550
3551 kfree((void *)softback_buf);
3552 softback_buf = 0UL;
3553
3554 for (i = 0; i < FB_MAX; i++) {
3555 int pending = 0;
3556
3557 mapped = 0;
3558 info = registered_fb[i];
3559
3560 if (info == NULL)
3561 continue;
3562
3563 if (info->queue.func)
3564 pending = cancel_work_sync(&info->queue);
3565 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3566 "no"));
3567
3568 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3569 if (con2fb_map[j] == i) {
3570 mapped = 1;
3571 break;
3572 }
3573 }
3574
3575 if (mapped) {
3576 if (info->fbops->fb_release)
3577 info->fbops->fb_release(info, 0);
3578 module_put(info->fbops->owner);
3579
3580 if (info->fbcon_par) {
3581 struct fbcon_ops *ops = info->fbcon_par;
3582
3583 fbcon_del_cursor_timer(info);
3584 kfree(ops->cursor_src);
3585 kfree(ops->cursor_state.mask);
3586 kfree(info->fbcon_par);
3587 info->fbcon_par = NULL;
3588 }
3589
3590 if (info->queue.func == fb_flashcursor)
3591 info->queue.func = NULL;
3592 }
3593 }
3594
3595 fbcon_has_exited = 1;
3596 }
3597
3598 static int __init fb_console_init(void)
3599 {
3600 int i;
3601
3602 console_lock();
3603 fb_register_client(&fbcon_event_notifier);
3604 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3605 "fbcon");
3606
3607 if (IS_ERR(fbcon_device)) {
3608 printk(KERN_WARNING "Unable to create device "
3609 "for fbcon; errno = %ld\n",
3610 PTR_ERR(fbcon_device));
3611 fbcon_device = NULL;
3612 } else
3613 fbcon_init_device();
3614
3615 for (i = 0; i < MAX_NR_CONSOLES; i++)
3616 con2fb_map[i] = -1;
3617
3618 console_unlock();
3619 fbcon_start();
3620 return 0;
3621 }
3622
3623 fs_initcall(fb_console_init);
3624
3625 #ifdef MODULE
3626
3627 static void __exit fbcon_deinit_device(void)
3628 {
3629 int i;
3630
3631 if (fbcon_has_sysfs) {
3632 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3633 device_remove_file(fbcon_device, &device_attrs[i]);
3634
3635 fbcon_has_sysfs = 0;
3636 }
3637 }
3638
3639 static void __exit fb_console_exit(void)
3640 {
3641 console_lock();
3642 fb_unregister_client(&fbcon_event_notifier);
3643 fbcon_deinit_device();
3644 device_destroy(fb_class, MKDEV(0, 0));
3645 fbcon_exit();
3646 do_unregister_con_driver(&fb_con);
3647 console_unlock();
3648 }
3649
3650 module_exit(fb_console_exit);
3651
3652 #endif
3653
3654 MODULE_LICENSE("GPL");
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