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Merge tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client
[linux/fpc-iii.git] / drivers / video / console / fbcon.c
blob12ded23f1aaff70a136114e78d58b3efdfaddc37
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 void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
168 int height, int width);
169 static int fbcon_switch(struct vc_data *vc);
170 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
171 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
172
173 /*
174 * Internal routines
175 */
176 static __inline__ void ywrap_up(struct vc_data *vc, int count);
177 static __inline__ void ywrap_down(struct vc_data *vc, int count);
178 static __inline__ void ypan_up(struct vc_data *vc, int count);
179 static __inline__ void ypan_down(struct vc_data *vc, int count);
180 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
181 int dy, int dx, int height, int width, u_int y_break);
182 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
183 int unit);
184 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
185 int line, int count, int dy);
186 static void fbcon_modechanged(struct fb_info *info);
187 static void fbcon_set_all_vcs(struct fb_info *info);
188 static void fbcon_start(void);
189 static void fbcon_exit(void);
190 static struct device *fbcon_device;
191
192 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
193 static inline void fbcon_set_rotation(struct fb_info *info)
194 {
195 struct fbcon_ops *ops = info->fbcon_par;
196
197 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
198 ops->p->con_rotate < 4)
199 ops->rotate = ops->p->con_rotate;
200 else
201 ops->rotate = 0;
202 }
203
204 static void fbcon_rotate(struct fb_info *info, u32 rotate)
205 {
206 struct fbcon_ops *ops= info->fbcon_par;
207 struct fb_info *fb_info;
208
209 if (!ops || ops->currcon == -1)
210 return;
211
212 fb_info = registered_fb[con2fb_map[ops->currcon]];
213
214 if (info == fb_info) {
215 struct display *p = &fb_display[ops->currcon];
216
217 if (rotate < 4)
218 p->con_rotate = rotate;
219 else
220 p->con_rotate = 0;
221
222 fbcon_modechanged(info);
223 }
224 }
225
226 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
227 {
228 struct fbcon_ops *ops = info->fbcon_par;
229 struct vc_data *vc;
230 struct display *p;
231 int i;
232
233 if (!ops || ops->currcon < 0 || rotate > 3)
234 return;
235
236 for (i = first_fb_vc; i <= last_fb_vc; i++) {
237 vc = vc_cons[i].d;
238 if (!vc || vc->vc_mode != KD_TEXT ||
239 registered_fb[con2fb_map[i]] != info)
240 continue;
241
242 p = &fb_display[vc->vc_num];
243 p->con_rotate = rotate;
244 }
245
246 fbcon_set_all_vcs(info);
247 }
248 #else
249 static inline void fbcon_set_rotation(struct fb_info *info)
250 {
251 struct fbcon_ops *ops = info->fbcon_par;
252
253 ops->rotate = FB_ROTATE_UR;
254 }
255
256 static void fbcon_rotate(struct fb_info *info, u32 rotate)
257 {
258 return;
259 }
260
261 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
262 {
263 return;
264 }
265 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
266
267 static int fbcon_get_rotate(struct fb_info *info)
268 {
269 struct fbcon_ops *ops = info->fbcon_par;
270
271 return (ops) ? ops->rotate : 0;
272 }
273
274 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
275 {
276 struct fbcon_ops *ops = info->fbcon_par;
277
278 return (info->state != FBINFO_STATE_RUNNING ||
279 vc->vc_mode != KD_TEXT || ops->graphics) &&
280 !vt_force_oops_output(vc);
281 }
282
283 static int get_color(struct vc_data *vc, struct fb_info *info,
284 u16 c, int is_fg)
285 {
286 int depth = fb_get_color_depth(&info->var, &info->fix);
287 int color = 0;
288
289 if (console_blanked) {
290 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
291
292 c = vc->vc_video_erase_char & charmask;
293 }
294
295 if (depth != 1)
296 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
297 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
298
299 switch (depth) {
300 case 1:
301 {
302 int col = mono_col(info);
303 /* 0 or 1 */
304 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
305 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
306
307 if (console_blanked)
308 fg = bg;
309
310 color = (is_fg) ? fg : bg;
311 break;
312 }
313 case 2:
314 /*
315 * Scale down 16-colors to 4 colors. Default 4-color palette
316 * is grayscale. However, simply dividing the values by 4
317 * will not work, as colors 1, 2 and 3 will be scaled-down
318 * to zero rendering them invisible. So empirically convert
319 * colors to a sane 4-level grayscale.
320 */
321 switch (color) {
322 case 0:
323 color = 0; /* black */
324 break;
325 case 1 ... 6:
326 color = 2; /* white */
327 break;
328 case 7 ... 8:
329 color = 1; /* gray */
330 break;
331 default:
332 color = 3; /* intense white */
333 break;
334 }
335 break;
336 case 3:
337 /*
338 * Last 8 entries of default 16-color palette is a more intense
339 * version of the first 8 (i.e., same chrominance, different
340 * luminance).
341 */
342 color &= 7;
343 break;
344 }
345
346
347 return color;
348 }
349
350 static void fbcon_update_softback(struct vc_data *vc)
351 {
352 int l = fbcon_softback_size / vc->vc_size_row;
353
354 if (l > 5)
355 softback_end = softback_buf + l * vc->vc_size_row;
356 else
357 /* Smaller scrollback makes no sense, and 0 would screw
358 the operation totally */
359 softback_top = 0;
360 }
361
362 static void fb_flashcursor(struct work_struct *work)
363 {
364 struct fb_info *info = container_of(work, struct fb_info, queue);
365 struct fbcon_ops *ops = info->fbcon_par;
366 struct vc_data *vc = NULL;
367 int c;
368 int mode;
369 int ret;
370
371 /* FIXME: we should sort out the unbind locking instead */
372 /* instead we just fail to flash the cursor if we can't get
373 * the lock instead of blocking fbcon deinit */
374 ret = console_trylock();
375 if (ret == 0)
376 return;
377
378 if (ops && ops->currcon != -1)
379 vc = vc_cons[ops->currcon].d;
380
381 if (!vc || !con_is_visible(vc) ||
382 registered_fb[con2fb_map[vc->vc_num]] != info ||
383 vc->vc_deccm != 1) {
384 console_unlock();
385 return;
386 }
387
388 c = scr_readw((u16 *) vc->vc_pos);
389 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
390 CM_ERASE : CM_DRAW;
391 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
392 get_color(vc, info, c, 0));
393 console_unlock();
394 }
395
396 static void cursor_timer_handler(unsigned long dev_addr)
397 {
398 struct fb_info *info = (struct fb_info *) dev_addr;
399 struct fbcon_ops *ops = info->fbcon_par;
400
401 queue_work(system_power_efficient_wq, &info->queue);
402 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
403 }
404
405 static void fbcon_add_cursor_timer(struct fb_info *info)
406 {
407 struct fbcon_ops *ops = info->fbcon_par;
408
409 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
410 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
411 !fbcon_cursor_noblink) {
412 if (!info->queue.func)
413 INIT_WORK(&info->queue, fb_flashcursor);
414
415 setup_timer(&ops->cursor_timer, cursor_timer_handler,
416 (unsigned long) info);
417 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
418 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
419 }
420 }
421
422 static void fbcon_del_cursor_timer(struct fb_info *info)
423 {
424 struct fbcon_ops *ops = info->fbcon_par;
425
426 if (info->queue.func == fb_flashcursor &&
427 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
428 del_timer_sync(&ops->cursor_timer);
429 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
430 }
431 }
432
433 #ifndef MODULE
434 static int __init fb_console_setup(char *this_opt)
435 {
436 char *options;
437 int i, j;
438
439 if (!this_opt || !*this_opt)
440 return 1;
441
442 while ((options = strsep(&this_opt, ",")) != NULL) {
443 if (!strncmp(options, "font:", 5)) {
444 strlcpy(fontname, options + 5, sizeof(fontname));
445 continue;
446 }
447
448 if (!strncmp(options, "scrollback:", 11)) {
449 options += 11;
450 if (*options) {
451 fbcon_softback_size = simple_strtoul(options, &options, 0);
452 if (*options == 'k' || *options == 'K') {
453 fbcon_softback_size *= 1024;
454 }
455 }
456 continue;
457 }
458
459 if (!strncmp(options, "map:", 4)) {
460 options += 4;
461 if (*options) {
462 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
463 if (!options[j])
464 j = 0;
465 con2fb_map_boot[i] =
466 (options[j++]-'0') % FB_MAX;
467 }
468
469 fbcon_map_override();
470 }
471 continue;
472 }
473
474 if (!strncmp(options, "vc:", 3)) {
475 options += 3;
476 if (*options)
477 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
478 if (first_fb_vc < 0)
479 first_fb_vc = 0;
480 if (*options++ == '-')
481 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
482 fbcon_is_default = 0;
483 continue;
484 }
485
486 if (!strncmp(options, "rotate:", 7)) {
487 options += 7;
488 if (*options)
489 initial_rotation = simple_strtoul(options, &options, 0);
490 if (initial_rotation > 3)
491 initial_rotation = 0;
492 continue;
493 }
494 }
495 return 1;
496 }
497
498 __setup("fbcon=", fb_console_setup);
499 #endif
500
501 static int search_fb_in_map(int idx)
502 {
503 int i, retval = 0;
504
505 for (i = first_fb_vc; i <= last_fb_vc; i++) {
506 if (con2fb_map[i] == idx)
507 retval = 1;
508 }
509 return retval;
510 }
511
512 static int search_for_mapped_con(void)
513 {
514 int i, retval = 0;
515
516 for (i = first_fb_vc; i <= last_fb_vc; i++) {
517 if (con2fb_map[i] != -1)
518 retval = 1;
519 }
520 return retval;
521 }
522
523 static int do_fbcon_takeover(int show_logo)
524 {
525 int err, i;
526
527 if (!num_registered_fb)
528 return -ENODEV;
529
530 if (!show_logo)
531 logo_shown = FBCON_LOGO_DONTSHOW;
532
533 for (i = first_fb_vc; i <= last_fb_vc; i++)
534 con2fb_map[i] = info_idx;
535
536 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
537 fbcon_is_default);
538
539 if (err) {
540 for (i = first_fb_vc; i <= last_fb_vc; i++)
541 con2fb_map[i] = -1;
542 info_idx = -1;
543 } else {
544 fbcon_has_console_bind = 1;
545 }
546
547 return err;
548 }
549
550 #ifdef MODULE
551 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
552 int cols, int rows, int new_cols, int new_rows)
553 {
554 logo_shown = FBCON_LOGO_DONTSHOW;
555 }
556 #else
557 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
558 int cols, int rows, int new_cols, int new_rows)
559 {
560 /* Need to make room for the logo */
561 struct fbcon_ops *ops = info->fbcon_par;
562 int cnt, erase = vc->vc_video_erase_char, step;
563 unsigned short *save = NULL, *r, *q;
564 int logo_height;
565
566 if (info->flags & FBINFO_MODULE) {
567 logo_shown = FBCON_LOGO_DONTSHOW;
568 return;
569 }
570
571 /*
572 * remove underline attribute from erase character
573 * if black and white framebuffer.
574 */
575 if (fb_get_color_depth(&info->var, &info->fix) == 1)
576 erase &= ~0x400;
577 logo_height = fb_prepare_logo(info, ops->rotate);
578 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
579 q = (unsigned short *) (vc->vc_origin +
580 vc->vc_size_row * rows);
581 step = logo_lines * cols;
582 for (r = q - logo_lines * cols; r < q; r++)
583 if (scr_readw(r) != vc->vc_video_erase_char)
584 break;
585 if (r != q && new_rows >= rows + logo_lines) {
586 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
587 if (save) {
588 int i = cols < new_cols ? cols : new_cols;
589 scr_memsetw(save, erase, logo_lines * new_cols * 2);
590 r = q - step;
591 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
592 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
593 r = q;
594 }
595 }
596 if (r == q) {
597 /* We can scroll screen down */
598 r = q - step - cols;
599 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
600 scr_memcpyw(r + step, r, vc->vc_size_row);
601 r -= cols;
602 }
603 if (!save) {
604 int lines;
605 if (vc->vc_y + logo_lines >= rows)
606 lines = rows - vc->vc_y - 1;
607 else
608 lines = logo_lines;
609 vc->vc_y += lines;
610 vc->vc_pos += lines * vc->vc_size_row;
611 }
612 }
613 scr_memsetw((unsigned short *) vc->vc_origin,
614 erase,
615 vc->vc_size_row * logo_lines);
616
617 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
618 fbcon_clear_margins(vc, 0);
619 update_screen(vc);
620 }
621
622 if (save) {
623 q = (unsigned short *) (vc->vc_origin +
624 vc->vc_size_row *
625 rows);
626 scr_memcpyw(q, save, logo_lines * new_cols * 2);
627 vc->vc_y += logo_lines;
628 vc->vc_pos += logo_lines * vc->vc_size_row;
629 kfree(save);
630 }
631
632 if (logo_lines > vc->vc_bottom) {
633 logo_shown = FBCON_LOGO_CANSHOW;
634 printk(KERN_INFO
635 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
636 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
637 logo_shown = FBCON_LOGO_DRAW;
638 vc->vc_top = logo_lines;
639 }
640 }
641 #endif /* MODULE */
642
643 #ifdef CONFIG_FB_TILEBLITTING
644 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
645 {
646 struct fbcon_ops *ops = info->fbcon_par;
647
648 ops->p = &fb_display[vc->vc_num];
649
650 if ((info->flags & FBINFO_MISC_TILEBLITTING))
651 fbcon_set_tileops(vc, info);
652 else {
653 fbcon_set_rotation(info);
654 fbcon_set_bitops(ops);
655 }
656 }
657
658 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
659 {
660 int err = 0;
661
662 if (info->flags & FBINFO_MISC_TILEBLITTING &&
663 info->tileops->fb_get_tilemax(info) < charcount)
664 err = 1;
665
666 return err;
667 }
668 #else
669 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
670 {
671 struct fbcon_ops *ops = info->fbcon_par;
672
673 info->flags &= ~FBINFO_MISC_TILEBLITTING;
674 ops->p = &fb_display[vc->vc_num];
675 fbcon_set_rotation(info);
676 fbcon_set_bitops(ops);
677 }
678
679 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
680 {
681 return 0;
682 }
683
684 #endif /* CONFIG_MISC_TILEBLITTING */
685
686
687 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
688 int unit, int oldidx)
689 {
690 struct fbcon_ops *ops = NULL;
691 int err = 0;
692
693 if (!try_module_get(info->fbops->owner))
694 err = -ENODEV;
695
696 if (!err && info->fbops->fb_open &&
697 info->fbops->fb_open(info, 0))
698 err = -ENODEV;
699
700 if (!err) {
701 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
702 if (!ops)
703 err = -ENOMEM;
704 }
705
706 if (!err) {
707 ops->cur_blink_jiffies = HZ / 5;
708 info->fbcon_par = ops;
709
710 if (vc)
711 set_blitting_type(vc, info);
712 }
713
714 if (err) {
715 con2fb_map[unit] = oldidx;
716 module_put(info->fbops->owner);
717 }
718
719 return err;
720 }
721
722 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
723 struct fb_info *newinfo, int unit,
724 int oldidx, int found)
725 {
726 struct fbcon_ops *ops = oldinfo->fbcon_par;
727 int err = 0, ret;
728
729 if (oldinfo->fbops->fb_release &&
730 oldinfo->fbops->fb_release(oldinfo, 0)) {
731 con2fb_map[unit] = oldidx;
732 if (!found && newinfo->fbops->fb_release)
733 newinfo->fbops->fb_release(newinfo, 0);
734 if (!found)
735 module_put(newinfo->fbops->owner);
736 err = -ENODEV;
737 }
738
739 if (!err) {
740 fbcon_del_cursor_timer(oldinfo);
741 kfree(ops->cursor_state.mask);
742 kfree(ops->cursor_data);
743 kfree(ops->cursor_src);
744 kfree(ops->fontbuffer);
745 kfree(oldinfo->fbcon_par);
746 oldinfo->fbcon_par = NULL;
747 module_put(oldinfo->fbops->owner);
748 /*
749 If oldinfo and newinfo are driving the same hardware,
750 the fb_release() method of oldinfo may attempt to
751 restore the hardware state. This will leave the
752 newinfo in an undefined state. Thus, a call to
753 fb_set_par() may be needed for the newinfo.
754 */
755 if (newinfo && newinfo->fbops->fb_set_par) {
756 ret = newinfo->fbops->fb_set_par(newinfo);
757
758 if (ret)
759 printk(KERN_ERR "con2fb_release_oldinfo: "
760 "detected unhandled fb_set_par error, "
761 "error code %d\n", ret);
762 }
763 }
764
765 return err;
766 }
767
768 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
769 int unit, int show_logo)
770 {
771 struct fbcon_ops *ops = info->fbcon_par;
772 int ret;
773
774 ops->currcon = fg_console;
775
776 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
777 ret = info->fbops->fb_set_par(info);
778
779 if (ret)
780 printk(KERN_ERR "con2fb_init_display: detected "
781 "unhandled fb_set_par error, "
782 "error code %d\n", ret);
783 }
784
785 ops->flags |= FBCON_FLAGS_INIT;
786 ops->graphics = 0;
787 fbcon_set_disp(info, &info->var, unit);
788
789 if (show_logo) {
790 struct vc_data *fg_vc = vc_cons[fg_console].d;
791 struct fb_info *fg_info =
792 registered_fb[con2fb_map[fg_console]];
793
794 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
795 fg_vc->vc_rows, fg_vc->vc_cols,
796 fg_vc->vc_rows);
797 }
798
799 update_screen(vc_cons[fg_console].d);
800 }
801
802 /**
803 * set_con2fb_map - map console to frame buffer device
804 * @unit: virtual console number to map
805 * @newidx: frame buffer index to map virtual console to
806 * @user: user request
807 *
808 * Maps a virtual console @unit to a frame buffer device
809 * @newidx.
810 *
811 * This should be called with the console lock held.
812 */
813 static int set_con2fb_map(int unit, int newidx, int user)
814 {
815 struct vc_data *vc = vc_cons[unit].d;
816 int oldidx = con2fb_map[unit];
817 struct fb_info *info = registered_fb[newidx];
818 struct fb_info *oldinfo = NULL;
819 int found, err = 0;
820
821 if (oldidx == newidx)
822 return 0;
823
824 if (!info)
825 return -EINVAL;
826
827 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
828 info_idx = newidx;
829 return do_fbcon_takeover(0);
830 }
831
832 if (oldidx != -1)
833 oldinfo = registered_fb[oldidx];
834
835 found = search_fb_in_map(newidx);
836
837 con2fb_map[unit] = newidx;
838 if (!err && !found)
839 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
840
841
842 /*
843 * If old fb is not mapped to any of the consoles,
844 * fbcon should release it.
845 */
846 if (!err && oldinfo && !search_fb_in_map(oldidx))
847 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
848 found);
849
850 if (!err) {
851 int show_logo = (fg_console == 0 && !user &&
852 logo_shown != FBCON_LOGO_DONTSHOW);
853
854 if (!found)
855 fbcon_add_cursor_timer(info);
856 con2fb_map_boot[unit] = newidx;
857 con2fb_init_display(vc, info, unit, show_logo);
858 }
859
860 if (!search_fb_in_map(info_idx))
861 info_idx = newidx;
862
863 return err;
864 }
865
866 /*
867 * Low Level Operations
868 */
869 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
870 static int var_to_display(struct display *disp,
871 struct fb_var_screeninfo *var,
872 struct fb_info *info)
873 {
874 disp->xres_virtual = var->xres_virtual;
875 disp->yres_virtual = var->yres_virtual;
876 disp->bits_per_pixel = var->bits_per_pixel;
877 disp->grayscale = var->grayscale;
878 disp->nonstd = var->nonstd;
879 disp->accel_flags = var->accel_flags;
880 disp->height = var->height;
881 disp->width = var->width;
882 disp->red = var->red;
883 disp->green = var->green;
884 disp->blue = var->blue;
885 disp->transp = var->transp;
886 disp->rotate = var->rotate;
887 disp->mode = fb_match_mode(var, &info->modelist);
888 if (disp->mode == NULL)
889 /* This should not happen */
890 return -EINVAL;
891 return 0;
892 }
893
894 static void display_to_var(struct fb_var_screeninfo *var,
895 struct display *disp)
896 {
897 fb_videomode_to_var(var, disp->mode);
898 var->xres_virtual = disp->xres_virtual;
899 var->yres_virtual = disp->yres_virtual;
900 var->bits_per_pixel = disp->bits_per_pixel;
901 var->grayscale = disp->grayscale;
902 var->nonstd = disp->nonstd;
903 var->accel_flags = disp->accel_flags;
904 var->height = disp->height;
905 var->width = disp->width;
906 var->red = disp->red;
907 var->green = disp->green;
908 var->blue = disp->blue;
909 var->transp = disp->transp;
910 var->rotate = disp->rotate;
911 }
912
913 static const char *fbcon_startup(void)
914 {
915 const char *display_desc = "frame buffer device";
916 struct display *p = &fb_display[fg_console];
917 struct vc_data *vc = vc_cons[fg_console].d;
918 const struct font_desc *font = NULL;
919 struct module *owner;
920 struct fb_info *info = NULL;
921 struct fbcon_ops *ops;
922 int rows, cols;
923
924 /*
925 * If num_registered_fb is zero, this is a call for the dummy part.
926 * The frame buffer devices weren't initialized yet.
927 */
928 if (!num_registered_fb || info_idx == -1)
929 return display_desc;
930 /*
931 * Instead of blindly using registered_fb[0], we use info_idx, set by
932 * fb_console_init();
933 */
934 info = registered_fb[info_idx];
935 if (!info)
936 return NULL;
937
938 owner = info->fbops->owner;
939 if (!try_module_get(owner))
940 return NULL;
941 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
942 module_put(owner);
943 return NULL;
944 }
945
946 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
947 if (!ops) {
948 module_put(owner);
949 return NULL;
950 }
951
952 ops->currcon = -1;
953 ops->graphics = 1;
954 ops->cur_rotate = -1;
955 ops->cur_blink_jiffies = HZ / 5;
956 info->fbcon_par = ops;
957 p->con_rotate = initial_rotation;
958 set_blitting_type(vc, info);
959
960 if (info->fix.type != FB_TYPE_TEXT) {
961 if (fbcon_softback_size) {
962 if (!softback_buf) {
963 softback_buf =
964 (unsigned long)
965 kmalloc(fbcon_softback_size,
966 GFP_KERNEL);
967 if (!softback_buf) {
968 fbcon_softback_size = 0;
969 softback_top = 0;
970 }
971 }
972 } else {
973 if (softback_buf) {
974 kfree((void *) softback_buf);
975 softback_buf = 0;
976 softback_top = 0;
977 }
978 }
979 if (softback_buf)
980 softback_in = softback_top = softback_curr =
981 softback_buf;
982 softback_lines = 0;
983 }
984
985 /* Setup default font */
986 if (!p->fontdata && !vc->vc_font.data) {
987 if (!fontname[0] || !(font = find_font(fontname)))
988 font = get_default_font(info->var.xres,
989 info->var.yres,
990 info->pixmap.blit_x,
991 info->pixmap.blit_y);
992 vc->vc_font.width = font->width;
993 vc->vc_font.height = font->height;
994 vc->vc_font.data = (void *)(p->fontdata = font->data);
995 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
996 } else {
997 p->fontdata = vc->vc_font.data;
998 }
999
1000 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1001 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1002 cols /= vc->vc_font.width;
1003 rows /= vc->vc_font.height;
1004 vc_resize(vc, cols, rows);
1005
1006 DPRINTK("mode: %s\n", info->fix.id);
1007 DPRINTK("visual: %d\n", info->fix.visual);
1008 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1009 info->var.yres,
1010 info->var.bits_per_pixel);
1011
1012 fbcon_add_cursor_timer(info);
1013 fbcon_has_exited = 0;
1014 return display_desc;
1015 }
1016
1017 static void fbcon_init(struct vc_data *vc, int init)
1018 {
1019 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1020 struct fbcon_ops *ops;
1021 struct vc_data **default_mode = vc->vc_display_fg;
1022 struct vc_data *svc = *default_mode;
1023 struct display *t, *p = &fb_display[vc->vc_num];
1024 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1025 int cap, ret;
1026
1027 if (info_idx == -1 || info == NULL)
1028 return;
1029
1030 cap = info->flags;
1031
1032 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1033 (info->fix.type == FB_TYPE_TEXT))
1034 logo = 0;
1035
1036 if (var_to_display(p, &info->var, info))
1037 return;
1038
1039 if (!info->fbcon_par)
1040 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1041
1042 /* If we are not the first console on this
1043 fb, copy the font from that console */
1044 t = &fb_display[fg_console];
1045 if (!p->fontdata) {
1046 if (t->fontdata) {
1047 struct vc_data *fvc = vc_cons[fg_console].d;
1048
1049 vc->vc_font.data = (void *)(p->fontdata =
1050 fvc->vc_font.data);
1051 vc->vc_font.width = fvc->vc_font.width;
1052 vc->vc_font.height = fvc->vc_font.height;
1053 p->userfont = t->userfont;
1054
1055 if (p->userfont)
1056 REFCOUNT(p->fontdata)++;
1057 } else {
1058 const struct font_desc *font = NULL;
1059
1060 if (!fontname[0] || !(font = find_font(fontname)))
1061 font = get_default_font(info->var.xres,
1062 info->var.yres,
1063 info->pixmap.blit_x,
1064 info->pixmap.blit_y);
1065 vc->vc_font.width = font->width;
1066 vc->vc_font.height = font->height;
1067 vc->vc_font.data = (void *)(p->fontdata = font->data);
1068 vc->vc_font.charcount = 256; /* FIXME Need to
1069 support more fonts */
1070 }
1071 }
1072
1073 if (p->userfont)
1074 charcnt = FNTCHARCNT(p->fontdata);
1075
1076 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1077 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1078 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1079 if (charcnt == 256) {
1080 vc->vc_hi_font_mask = 0;
1081 } else {
1082 vc->vc_hi_font_mask = 0x100;
1083 if (vc->vc_can_do_color)
1084 vc->vc_complement_mask <<= 1;
1085 }
1086
1087 if (!*svc->vc_uni_pagedir_loc)
1088 con_set_default_unimap(svc);
1089 if (!*vc->vc_uni_pagedir_loc)
1090 con_copy_unimap(vc, svc);
1091
1092 ops = info->fbcon_par;
1093 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1094 p->con_rotate = initial_rotation;
1095 set_blitting_type(vc, info);
1096
1097 cols = vc->vc_cols;
1098 rows = vc->vc_rows;
1099 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1100 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1101 new_cols /= vc->vc_font.width;
1102 new_rows /= vc->vc_font.height;
1103
1104 /*
1105 * We must always set the mode. The mode of the previous console
1106 * driver could be in the same resolution but we are using different
1107 * hardware so we have to initialize the hardware.
1108 *
1109 * We need to do it in fbcon_init() to prevent screen corruption.
1110 */
1111 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1112 if (info->fbops->fb_set_par &&
1113 !(ops->flags & FBCON_FLAGS_INIT)) {
1114 ret = info->fbops->fb_set_par(info);
1115
1116 if (ret)
1117 printk(KERN_ERR "fbcon_init: detected "
1118 "unhandled fb_set_par error, "
1119 "error code %d\n", ret);
1120 }
1121
1122 ops->flags |= FBCON_FLAGS_INIT;
1123 }
1124
1125 ops->graphics = 0;
1126
1127 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1128 !(cap & FBINFO_HWACCEL_DISABLED))
1129 p->scrollmode = SCROLL_MOVE;
1130 else /* default to something safe */
1131 p->scrollmode = SCROLL_REDRAW;
1132
1133 /*
1134 * ++guenther: console.c:vc_allocate() relies on initializing
1135 * vc_{cols,rows}, but we must not set those if we are only
1136 * resizing the console.
1137 */
1138 if (init) {
1139 vc->vc_cols = new_cols;
1140 vc->vc_rows = new_rows;
1141 } else
1142 vc_resize(vc, new_cols, new_rows);
1143
1144 if (logo)
1145 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1146
1147 if (vc == svc && softback_buf)
1148 fbcon_update_softback(vc);
1149
1150 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1151 ops->rotate = FB_ROTATE_UR;
1152 set_blitting_type(vc, info);
1153 }
1154
1155 ops->p = &fb_display[fg_console];
1156 }
1157
1158 static void fbcon_free_font(struct display *p, bool freefont)
1159 {
1160 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1161 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1162 p->fontdata = NULL;
1163 p->userfont = 0;
1164 }
1165
1166 static void set_vc_hi_font(struct vc_data *vc, bool set);
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 (vc->vc_hi_font_mask)
1204 set_vc_hi_font(vc, false);
1205
1206 if (!con_is_bound(&fb_con))
1207 fbcon_exit();
1208
1209 return;
1210 }
1211
1212 /* ====================================================================== */
1213
1214 /* fbcon_XXX routines - interface used by the world
1215 *
1216 * This system is now divided into two levels because of complications
1217 * caused by hardware scrolling. Top level functions:
1218 *
1219 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1220 *
1221 * handles y values in range [0, scr_height-1] that correspond to real
1222 * screen positions. y_wrap shift means that first line of bitmap may be
1223 * anywhere on this display. These functions convert lineoffsets to
1224 * bitmap offsets and deal with the wrap-around case by splitting blits.
1225 *
1226 * fbcon_bmove_physical_8() -- These functions fast implementations
1227 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1228 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1229 *
1230 * WARNING:
1231 *
1232 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1233 * Implies should only really hardware scroll in rows. Only reason for
1234 * restriction is simplicity & efficiency at the moment.
1235 */
1236
1237 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1238 int width)
1239 {
1240 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1241 struct fbcon_ops *ops = info->fbcon_par;
1242
1243 struct display *p = &fb_display[vc->vc_num];
1244 u_int y_break;
1245
1246 if (fbcon_is_inactive(vc, info))
1247 return;
1248
1249 if (!height || !width)
1250 return;
1251
1252 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1253 vc->vc_top = 0;
1254 /*
1255 * If the font dimensions are not an integral of the display
1256 * dimensions then the ops->clear below won't end up clearing
1257 * the margins. Call clear_margins here in case the logo
1258 * bitmap stretched into the margin area.
1259 */
1260 fbcon_clear_margins(vc, 0);
1261 }
1262
1263 /* Split blits that cross physical y_wrap boundary */
1264
1265 y_break = p->vrows - p->yscroll;
1266 if (sy < y_break && sy + height - 1 >= y_break) {
1267 u_int b = y_break - sy;
1268 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1269 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1270 width);
1271 } else
1272 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1273 }
1274
1275 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1276 int count, int ypos, int xpos)
1277 {
1278 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1279 struct display *p = &fb_display[vc->vc_num];
1280 struct fbcon_ops *ops = info->fbcon_par;
1281
1282 if (!fbcon_is_inactive(vc, info))
1283 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1284 get_color(vc, info, scr_readw(s), 1),
1285 get_color(vc, info, scr_readw(s), 0));
1286 }
1287
1288 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1289 {
1290 unsigned short chr;
1291
1292 scr_writew(c, &chr);
1293 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1294 }
1295
1296 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1297 {
1298 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1299 struct fbcon_ops *ops = info->fbcon_par;
1300
1301 if (!fbcon_is_inactive(vc, info))
1302 ops->clear_margins(vc, info, bottom_only);
1303 }
1304
1305 static void fbcon_cursor(struct vc_data *vc, int mode)
1306 {
1307 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1308 struct fbcon_ops *ops = info->fbcon_par;
1309 int y;
1310 int c = scr_readw((u16 *) vc->vc_pos);
1311
1312 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1313
1314 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1315 return;
1316
1317 if (vc->vc_cursor_type & 0x10)
1318 fbcon_del_cursor_timer(info);
1319 else
1320 fbcon_add_cursor_timer(info);
1321
1322 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1323 if (mode & CM_SOFTBACK) {
1324 mode &= ~CM_SOFTBACK;
1325 y = softback_lines;
1326 } else {
1327 if (softback_lines)
1328 fbcon_set_origin(vc);
1329 y = 0;
1330 }
1331
1332 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1333 get_color(vc, info, c, 0));
1334 }
1335
1336 static int scrollback_phys_max = 0;
1337 static int scrollback_max = 0;
1338 static int scrollback_current = 0;
1339
1340 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1341 int unit)
1342 {
1343 struct display *p, *t;
1344 struct vc_data **default_mode, *vc;
1345 struct vc_data *svc;
1346 struct fbcon_ops *ops = info->fbcon_par;
1347 int rows, cols, charcnt = 256;
1348
1349 p = &fb_display[unit];
1350
1351 if (var_to_display(p, var, info))
1352 return;
1353
1354 vc = vc_cons[unit].d;
1355
1356 if (!vc)
1357 return;
1358
1359 default_mode = vc->vc_display_fg;
1360 svc = *default_mode;
1361 t = &fb_display[svc->vc_num];
1362
1363 if (!vc->vc_font.data) {
1364 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1365 vc->vc_font.width = (*default_mode)->vc_font.width;
1366 vc->vc_font.height = (*default_mode)->vc_font.height;
1367 p->userfont = t->userfont;
1368 if (p->userfont)
1369 REFCOUNT(p->fontdata)++;
1370 }
1371 if (p->userfont)
1372 charcnt = FNTCHARCNT(p->fontdata);
1373
1374 var->activate = FB_ACTIVATE_NOW;
1375 info->var.activate = var->activate;
1376 var->yoffset = info->var.yoffset;
1377 var->xoffset = info->var.xoffset;
1378 fb_set_var(info, var);
1379 ops->var = info->var;
1380 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1381 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1382 if (charcnt == 256) {
1383 vc->vc_hi_font_mask = 0;
1384 } else {
1385 vc->vc_hi_font_mask = 0x100;
1386 if (vc->vc_can_do_color)
1387 vc->vc_complement_mask <<= 1;
1388 }
1389
1390 if (!*svc->vc_uni_pagedir_loc)
1391 con_set_default_unimap(svc);
1392 if (!*vc->vc_uni_pagedir_loc)
1393 con_copy_unimap(vc, svc);
1394
1395 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1396 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1397 cols /= vc->vc_font.width;
1398 rows /= vc->vc_font.height;
1399 vc_resize(vc, cols, rows);
1400
1401 if (con_is_visible(vc)) {
1402 update_screen(vc);
1403 if (softback_buf)
1404 fbcon_update_softback(vc);
1405 }
1406 }
1407
1408 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1409 {
1410 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1411 struct fbcon_ops *ops = info->fbcon_par;
1412 struct display *p = &fb_display[vc->vc_num];
1413
1414 p->yscroll += count;
1415 if (p->yscroll >= p->vrows) /* Deal with wrap */
1416 p->yscroll -= p->vrows;
1417 ops->var.xoffset = 0;
1418 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1419 ops->var.vmode |= FB_VMODE_YWRAP;
1420 ops->update_start(info);
1421 scrollback_max += count;
1422 if (scrollback_max > scrollback_phys_max)
1423 scrollback_max = scrollback_phys_max;
1424 scrollback_current = 0;
1425 }
1426
1427 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1428 {
1429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1430 struct fbcon_ops *ops = info->fbcon_par;
1431 struct display *p = &fb_display[vc->vc_num];
1432
1433 p->yscroll -= count;
1434 if (p->yscroll < 0) /* Deal with wrap */
1435 p->yscroll += p->vrows;
1436 ops->var.xoffset = 0;
1437 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1438 ops->var.vmode |= FB_VMODE_YWRAP;
1439 ops->update_start(info);
1440 scrollback_max -= count;
1441 if (scrollback_max < 0)
1442 scrollback_max = 0;
1443 scrollback_current = 0;
1444 }
1445
1446 static __inline__ void ypan_up(struct vc_data *vc, int count)
1447 {
1448 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1449 struct display *p = &fb_display[vc->vc_num];
1450 struct fbcon_ops *ops = info->fbcon_par;
1451
1452 p->yscroll += count;
1453 if (p->yscroll > p->vrows - vc->vc_rows) {
1454 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1455 0, 0, 0, vc->vc_rows, vc->vc_cols);
1456 p->yscroll -= p->vrows - vc->vc_rows;
1457 }
1458
1459 ops->var.xoffset = 0;
1460 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1461 ops->var.vmode &= ~FB_VMODE_YWRAP;
1462 ops->update_start(info);
1463 fbcon_clear_margins(vc, 1);
1464 scrollback_max += count;
1465 if (scrollback_max > scrollback_phys_max)
1466 scrollback_max = scrollback_phys_max;
1467 scrollback_current = 0;
1468 }
1469
1470 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1471 {
1472 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1473 struct fbcon_ops *ops = info->fbcon_par;
1474 struct display *p = &fb_display[vc->vc_num];
1475
1476 p->yscroll += count;
1477
1478 if (p->yscroll > p->vrows - vc->vc_rows) {
1479 p->yscroll -= p->vrows - vc->vc_rows;
1480 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1481 }
1482
1483 ops->var.xoffset = 0;
1484 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1485 ops->var.vmode &= ~FB_VMODE_YWRAP;
1486 ops->update_start(info);
1487 fbcon_clear_margins(vc, 1);
1488 scrollback_max += count;
1489 if (scrollback_max > scrollback_phys_max)
1490 scrollback_max = scrollback_phys_max;
1491 scrollback_current = 0;
1492 }
1493
1494 static __inline__ void ypan_down(struct vc_data *vc, int count)
1495 {
1496 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1497 struct display *p = &fb_display[vc->vc_num];
1498 struct fbcon_ops *ops = info->fbcon_par;
1499
1500 p->yscroll -= count;
1501 if (p->yscroll < 0) {
1502 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1503 0, vc->vc_rows, vc->vc_cols);
1504 p->yscroll += p->vrows - vc->vc_rows;
1505 }
1506
1507 ops->var.xoffset = 0;
1508 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1509 ops->var.vmode &= ~FB_VMODE_YWRAP;
1510 ops->update_start(info);
1511 fbcon_clear_margins(vc, 1);
1512 scrollback_max -= count;
1513 if (scrollback_max < 0)
1514 scrollback_max = 0;
1515 scrollback_current = 0;
1516 }
1517
1518 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1519 {
1520 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1521 struct fbcon_ops *ops = info->fbcon_par;
1522 struct display *p = &fb_display[vc->vc_num];
1523
1524 p->yscroll -= count;
1525
1526 if (p->yscroll < 0) {
1527 p->yscroll += p->vrows - vc->vc_rows;
1528 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1529 }
1530
1531 ops->var.xoffset = 0;
1532 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1533 ops->var.vmode &= ~FB_VMODE_YWRAP;
1534 ops->update_start(info);
1535 fbcon_clear_margins(vc, 1);
1536 scrollback_max -= count;
1537 if (scrollback_max < 0)
1538 scrollback_max = 0;
1539 scrollback_current = 0;
1540 }
1541
1542 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1543 long delta)
1544 {
1545 int count = vc->vc_rows;
1546 unsigned short *d, *s;
1547 unsigned long n;
1548 int line = 0;
1549
1550 d = (u16 *) softback_curr;
1551 if (d == (u16 *) softback_in)
1552 d = (u16 *) vc->vc_origin;
1553 n = softback_curr + delta * vc->vc_size_row;
1554 softback_lines -= delta;
1555 if (delta < 0) {
1556 if (softback_curr < softback_top && n < softback_buf) {
1557 n += softback_end - softback_buf;
1558 if (n < softback_top) {
1559 softback_lines -=
1560 (softback_top - n) / vc->vc_size_row;
1561 n = softback_top;
1562 }
1563 } else if (softback_curr >= softback_top
1564 && n < softback_top) {
1565 softback_lines -=
1566 (softback_top - n) / vc->vc_size_row;
1567 n = softback_top;
1568 }
1569 } else {
1570 if (softback_curr > softback_in && n >= softback_end) {
1571 n += softback_buf - softback_end;
1572 if (n > softback_in) {
1573 n = softback_in;
1574 softback_lines = 0;
1575 }
1576 } else if (softback_curr <= softback_in && n > softback_in) {
1577 n = softback_in;
1578 softback_lines = 0;
1579 }
1580 }
1581 if (n == softback_curr)
1582 return;
1583 softback_curr = n;
1584 s = (u16 *) softback_curr;
1585 if (s == (u16 *) softback_in)
1586 s = (u16 *) vc->vc_origin;
1587 while (count--) {
1588 unsigned short *start;
1589 unsigned short *le;
1590 unsigned short c;
1591 int x = 0;
1592 unsigned short attr = 1;
1593
1594 start = s;
1595 le = advance_row(s, 1);
1596 do {
1597 c = scr_readw(s);
1598 if (attr != (c & 0xff00)) {
1599 attr = c & 0xff00;
1600 if (s > start) {
1601 fbcon_putcs(vc, start, s - start,
1602 line, x);
1603 x += s - start;
1604 start = s;
1605 }
1606 }
1607 if (c == scr_readw(d)) {
1608 if (s > start) {
1609 fbcon_putcs(vc, start, s - start,
1610 line, x);
1611 x += s - start + 1;
1612 start = s + 1;
1613 } else {
1614 x++;
1615 start++;
1616 }
1617 }
1618 s++;
1619 d++;
1620 } while (s < le);
1621 if (s > start)
1622 fbcon_putcs(vc, start, s - start, line, x);
1623 line++;
1624 if (d == (u16 *) softback_end)
1625 d = (u16 *) softback_buf;
1626 if (d == (u16 *) softback_in)
1627 d = (u16 *) vc->vc_origin;
1628 if (s == (u16 *) softback_end)
1629 s = (u16 *) softback_buf;
1630 if (s == (u16 *) softback_in)
1631 s = (u16 *) vc->vc_origin;
1632 }
1633 }
1634
1635 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1636 int line, int count, int dy)
1637 {
1638 unsigned short *s = (unsigned short *)
1639 (vc->vc_origin + vc->vc_size_row * line);
1640
1641 while (count--) {
1642 unsigned short *start = s;
1643 unsigned short *le = advance_row(s, 1);
1644 unsigned short c;
1645 int x = 0;
1646 unsigned short attr = 1;
1647
1648 do {
1649 c = scr_readw(s);
1650 if (attr != (c & 0xff00)) {
1651 attr = c & 0xff00;
1652 if (s > start) {
1653 fbcon_putcs(vc, start, s - start,
1654 dy, x);
1655 x += s - start;
1656 start = s;
1657 }
1658 }
1659 console_conditional_schedule();
1660 s++;
1661 } while (s < le);
1662 if (s > start)
1663 fbcon_putcs(vc, start, s - start, dy, x);
1664 console_conditional_schedule();
1665 dy++;
1666 }
1667 }
1668
1669 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1670 struct display *p, int line, int count, int ycount)
1671 {
1672 int offset = ycount * vc->vc_cols;
1673 unsigned short *d = (unsigned short *)
1674 (vc->vc_origin + vc->vc_size_row * line);
1675 unsigned short *s = d + offset;
1676 struct fbcon_ops *ops = info->fbcon_par;
1677
1678 while (count--) {
1679 unsigned short *start = s;
1680 unsigned short *le = advance_row(s, 1);
1681 unsigned short c;
1682 int x = 0;
1683
1684 do {
1685 c = scr_readw(s);
1686
1687 if (c == scr_readw(d)) {
1688 if (s > start) {
1689 ops->bmove(vc, info, line + ycount, x,
1690 line, x, 1, s-start);
1691 x += s - start + 1;
1692 start = s + 1;
1693 } else {
1694 x++;
1695 start++;
1696 }
1697 }
1698
1699 scr_writew(c, d);
1700 console_conditional_schedule();
1701 s++;
1702 d++;
1703 } while (s < le);
1704 if (s > start)
1705 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1706 s-start);
1707 console_conditional_schedule();
1708 if (ycount > 0)
1709 line++;
1710 else {
1711 line--;
1712 /* NOTE: We subtract two lines from these pointers */
1713 s -= vc->vc_size_row;
1714 d -= vc->vc_size_row;
1715 }
1716 }
1717 }
1718
1719 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1720 int line, int count, int offset)
1721 {
1722 unsigned short *d = (unsigned short *)
1723 (vc->vc_origin + vc->vc_size_row * line);
1724 unsigned short *s = d + offset;
1725
1726 while (count--) {
1727 unsigned short *start = s;
1728 unsigned short *le = advance_row(s, 1);
1729 unsigned short c;
1730 int x = 0;
1731 unsigned short attr = 1;
1732
1733 do {
1734 c = scr_readw(s);
1735 if (attr != (c & 0xff00)) {
1736 attr = c & 0xff00;
1737 if (s > start) {
1738 fbcon_putcs(vc, start, s - start,
1739 line, x);
1740 x += s - start;
1741 start = s;
1742 }
1743 }
1744 if (c == scr_readw(d)) {
1745 if (s > start) {
1746 fbcon_putcs(vc, start, s - start,
1747 line, x);
1748 x += s - start + 1;
1749 start = s + 1;
1750 } else {
1751 x++;
1752 start++;
1753 }
1754 }
1755 scr_writew(c, d);
1756 console_conditional_schedule();
1757 s++;
1758 d++;
1759 } while (s < le);
1760 if (s > start)
1761 fbcon_putcs(vc, start, s - start, line, x);
1762 console_conditional_schedule();
1763 if (offset > 0)
1764 line++;
1765 else {
1766 line--;
1767 /* NOTE: We subtract two lines from these pointers */
1768 s -= vc->vc_size_row;
1769 d -= vc->vc_size_row;
1770 }
1771 }
1772 }
1773
1774 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1775 int count)
1776 {
1777 unsigned short *p;
1778
1779 if (vc->vc_num != fg_console)
1780 return;
1781 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1782
1783 while (count) {
1784 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1785 count--;
1786 p = advance_row(p, 1);
1787 softback_in += vc->vc_size_row;
1788 if (softback_in == softback_end)
1789 softback_in = softback_buf;
1790 if (softback_in == softback_top) {
1791 softback_top += vc->vc_size_row;
1792 if (softback_top == softback_end)
1793 softback_top = softback_buf;
1794 }
1795 }
1796 softback_curr = softback_in;
1797 }
1798
1799 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1800 enum con_scroll dir, unsigned int count)
1801 {
1802 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1803 struct display *p = &fb_display[vc->vc_num];
1804 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1805
1806 if (fbcon_is_inactive(vc, info))
1807 return true;
1808
1809 fbcon_cursor(vc, CM_ERASE);
1810
1811 /*
1812 * ++Geert: Only use ywrap/ypan if the console is in text mode
1813 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1814 * whole screen (prevents flicker).
1815 */
1816
1817 switch (dir) {
1818 case SM_UP:
1819 if (count > vc->vc_rows) /* Maximum realistic size */
1820 count = vc->vc_rows;
1821 if (softback_top)
1822 fbcon_softback_note(vc, t, count);
1823 if (logo_shown >= 0)
1824 goto redraw_up;
1825 switch (p->scrollmode) {
1826 case SCROLL_MOVE:
1827 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1828 count);
1829 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1830 scr_memsetw((unsigned short *) (vc->vc_origin +
1831 vc->vc_size_row *
1832 (b - count)),
1833 vc->vc_video_erase_char,
1834 vc->vc_size_row * count);
1835 return true;
1836 break;
1837
1838 case SCROLL_WRAP_MOVE:
1839 if (b - t - count > 3 * vc->vc_rows >> 2) {
1840 if (t > 0)
1841 fbcon_bmove(vc, 0, 0, count, 0, t,
1842 vc->vc_cols);
1843 ywrap_up(vc, count);
1844 if (vc->vc_rows - b > 0)
1845 fbcon_bmove(vc, b - count, 0, b, 0,
1846 vc->vc_rows - b,
1847 vc->vc_cols);
1848 } else if (info->flags & FBINFO_READS_FAST)
1849 fbcon_bmove(vc, t + count, 0, t, 0,
1850 b - t - count, vc->vc_cols);
1851 else
1852 goto redraw_up;
1853 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1854 break;
1855
1856 case SCROLL_PAN_REDRAW:
1857 if ((p->yscroll + count <=
1858 2 * (p->vrows - vc->vc_rows))
1859 && ((!scroll_partial && (b - t == vc->vc_rows))
1860 || (scroll_partial
1861 && (b - t - count >
1862 3 * vc->vc_rows >> 2)))) {
1863 if (t > 0)
1864 fbcon_redraw_move(vc, p, 0, t, count);
1865 ypan_up_redraw(vc, t, count);
1866 if (vc->vc_rows - b > 0)
1867 fbcon_redraw_move(vc, p, b,
1868 vc->vc_rows - b, b);
1869 } else
1870 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1871 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1872 break;
1873
1874 case SCROLL_PAN_MOVE:
1875 if ((p->yscroll + count <=
1876 2 * (p->vrows - vc->vc_rows))
1877 && ((!scroll_partial && (b - t == vc->vc_rows))
1878 || (scroll_partial
1879 && (b - t - count >
1880 3 * vc->vc_rows >> 2)))) {
1881 if (t > 0)
1882 fbcon_bmove(vc, 0, 0, count, 0, t,
1883 vc->vc_cols);
1884 ypan_up(vc, count);
1885 if (vc->vc_rows - b > 0)
1886 fbcon_bmove(vc, b - count, 0, b, 0,
1887 vc->vc_rows - b,
1888 vc->vc_cols);
1889 } else if (info->flags & FBINFO_READS_FAST)
1890 fbcon_bmove(vc, t + count, 0, t, 0,
1891 b - t - count, vc->vc_cols);
1892 else
1893 goto redraw_up;
1894 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1895 break;
1896
1897 case SCROLL_REDRAW:
1898 redraw_up:
1899 fbcon_redraw(vc, p, t, b - t - count,
1900 count * vc->vc_cols);
1901 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1902 scr_memsetw((unsigned short *) (vc->vc_origin +
1903 vc->vc_size_row *
1904 (b - count)),
1905 vc->vc_video_erase_char,
1906 vc->vc_size_row * count);
1907 return true;
1908 }
1909 break;
1910
1911 case SM_DOWN:
1912 if (count > vc->vc_rows) /* Maximum realistic size */
1913 count = vc->vc_rows;
1914 if (logo_shown >= 0)
1915 goto redraw_down;
1916 switch (p->scrollmode) {
1917 case SCROLL_MOVE:
1918 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1919 -count);
1920 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1921 scr_memsetw((unsigned short *) (vc->vc_origin +
1922 vc->vc_size_row *
1923 t),
1924 vc->vc_video_erase_char,
1925 vc->vc_size_row * count);
1926 return true;
1927 break;
1928
1929 case SCROLL_WRAP_MOVE:
1930 if (b - t - count > 3 * vc->vc_rows >> 2) {
1931 if (vc->vc_rows - b > 0)
1932 fbcon_bmove(vc, b, 0, b - count, 0,
1933 vc->vc_rows - b,
1934 vc->vc_cols);
1935 ywrap_down(vc, count);
1936 if (t > 0)
1937 fbcon_bmove(vc, count, 0, 0, 0, t,
1938 vc->vc_cols);
1939 } else if (info->flags & FBINFO_READS_FAST)
1940 fbcon_bmove(vc, t, 0, t + count, 0,
1941 b - t - count, vc->vc_cols);
1942 else
1943 goto redraw_down;
1944 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945 break;
1946
1947 case SCROLL_PAN_MOVE:
1948 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1949 && ((!scroll_partial && (b - t == vc->vc_rows))
1950 || (scroll_partial
1951 && (b - t - count >
1952 3 * vc->vc_rows >> 2)))) {
1953 if (vc->vc_rows - b > 0)
1954 fbcon_bmove(vc, b, 0, b - count, 0,
1955 vc->vc_rows - b,
1956 vc->vc_cols);
1957 ypan_down(vc, count);
1958 if (t > 0)
1959 fbcon_bmove(vc, count, 0, 0, 0, t,
1960 vc->vc_cols);
1961 } else if (info->flags & FBINFO_READS_FAST)
1962 fbcon_bmove(vc, t, 0, t + count, 0,
1963 b - t - count, vc->vc_cols);
1964 else
1965 goto redraw_down;
1966 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1967 break;
1968
1969 case SCROLL_PAN_REDRAW:
1970 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1971 && ((!scroll_partial && (b - t == vc->vc_rows))
1972 || (scroll_partial
1973 && (b - t - count >
1974 3 * vc->vc_rows >> 2)))) {
1975 if (vc->vc_rows - b > 0)
1976 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1977 b - count);
1978 ypan_down_redraw(vc, t, count);
1979 if (t > 0)
1980 fbcon_redraw_move(vc, p, count, t, 0);
1981 } else
1982 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1983 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1984 break;
1985
1986 case SCROLL_REDRAW:
1987 redraw_down:
1988 fbcon_redraw(vc, p, b - 1, b - t - count,
1989 -count * vc->vc_cols);
1990 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1991 scr_memsetw((unsigned short *) (vc->vc_origin +
1992 vc->vc_size_row *
1993 t),
1994 vc->vc_video_erase_char,
1995 vc->vc_size_row * count);
1996 return true;
1997 }
1998 }
1999 return false;
2000 }
2001
2002
2003 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2004 int height, int width)
2005 {
2006 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2007 struct display *p = &fb_display[vc->vc_num];
2008
2009 if (fbcon_is_inactive(vc, info))
2010 return;
2011
2012 if (!width || !height)
2013 return;
2014
2015 /* Split blits that cross physical y_wrap case.
2016 * Pathological case involves 4 blits, better to use recursive
2017 * code rather than unrolled case
2018 *
2019 * Recursive invocations don't need to erase the cursor over and
2020 * over again, so we use fbcon_bmove_rec()
2021 */
2022 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2023 p->vrows - p->yscroll);
2024 }
2025
2026 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2027 int dy, int dx, int height, int width, u_int y_break)
2028 {
2029 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2030 struct fbcon_ops *ops = info->fbcon_par;
2031 u_int b;
2032
2033 if (sy < y_break && sy + height > y_break) {
2034 b = y_break - sy;
2035 if (dy < sy) { /* Avoid trashing self */
2036 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2037 y_break);
2038 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2039 height - b, width, y_break);
2040 } else {
2041 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2042 height - b, width, y_break);
2043 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2044 y_break);
2045 }
2046 return;
2047 }
2048
2049 if (dy < y_break && dy + height > y_break) {
2050 b = y_break - dy;
2051 if (dy < sy) { /* Avoid trashing self */
2052 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2053 y_break);
2054 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2055 height - b, width, y_break);
2056 } else {
2057 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2058 height - b, width, y_break);
2059 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2060 y_break);
2061 }
2062 return;
2063 }
2064 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2065 height, width);
2066 }
2067
2068 static void updatescrollmode(struct display *p,
2069 struct fb_info *info,
2070 struct vc_data *vc)
2071 {
2072 struct fbcon_ops *ops = info->fbcon_par;
2073 int fh = vc->vc_font.height;
2074 int cap = info->flags;
2075 u16 t = 0;
2076 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2077 info->fix.xpanstep);
2078 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2079 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2080 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2081 info->var.xres_virtual);
2082 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2083 divides(ypan, vc->vc_font.height) && vyres > yres;
2084 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2085 divides(ywrap, vc->vc_font.height) &&
2086 divides(vc->vc_font.height, vyres) &&
2087 divides(vc->vc_font.height, yres);
2088 int reading_fast = cap & FBINFO_READS_FAST;
2089 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2090 !(cap & FBINFO_HWACCEL_DISABLED);
2091 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2092 !(cap & FBINFO_HWACCEL_DISABLED);
2093
2094 p->vrows = vyres/fh;
2095 if (yres > (fh * (vc->vc_rows + 1)))
2096 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2097 if ((yres % fh) && (vyres % fh < yres % fh))
2098 p->vrows--;
2099
2100 if (good_wrap || good_pan) {
2101 if (reading_fast || fast_copyarea)
2102 p->scrollmode = good_wrap ?
2103 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2104 else
2105 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2106 SCROLL_PAN_REDRAW;
2107 } else {
2108 if (reading_fast || (fast_copyarea && !fast_imageblit))
2109 p->scrollmode = SCROLL_MOVE;
2110 else
2111 p->scrollmode = SCROLL_REDRAW;
2112 }
2113 }
2114
2115 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2116 unsigned int height, unsigned int user)
2117 {
2118 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2119 struct fbcon_ops *ops = info->fbcon_par;
2120 struct display *p = &fb_display[vc->vc_num];
2121 struct fb_var_screeninfo var = info->var;
2122 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2123
2124 virt_w = FBCON_SWAP(ops->rotate, width, height);
2125 virt_h = FBCON_SWAP(ops->rotate, height, width);
2126 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2127 vc->vc_font.height);
2128 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2129 vc->vc_font.width);
2130 var.xres = virt_w * virt_fw;
2131 var.yres = virt_h * virt_fh;
2132 x_diff = info->var.xres - var.xres;
2133 y_diff = info->var.yres - var.yres;
2134 if (x_diff < 0 || x_diff > virt_fw ||
2135 y_diff < 0 || y_diff > virt_fh) {
2136 const struct fb_videomode *mode;
2137
2138 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2139 mode = fb_find_best_mode(&var, &info->modelist);
2140 if (mode == NULL)
2141 return -EINVAL;
2142 display_to_var(&var, p);
2143 fb_videomode_to_var(&var, mode);
2144
2145 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2146 return -EINVAL;
2147
2148 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2149 if (con_is_visible(vc)) {
2150 var.activate = FB_ACTIVATE_NOW |
2151 FB_ACTIVATE_FORCE;
2152 fb_set_var(info, &var);
2153 }
2154 var_to_display(p, &info->var, info);
2155 ops->var = info->var;
2156 }
2157 updatescrollmode(p, info, vc);
2158 return 0;
2159 }
2160
2161 static int fbcon_switch(struct vc_data *vc)
2162 {
2163 struct fb_info *info, *old_info = NULL;
2164 struct fbcon_ops *ops;
2165 struct display *p = &fb_display[vc->vc_num];
2166 struct fb_var_screeninfo var;
2167 int i, ret, prev_console, charcnt = 256;
2168
2169 info = registered_fb[con2fb_map[vc->vc_num]];
2170 ops = info->fbcon_par;
2171
2172 if (softback_top) {
2173 if (softback_lines)
2174 fbcon_set_origin(vc);
2175 softback_top = softback_curr = softback_in = softback_buf;
2176 softback_lines = 0;
2177 fbcon_update_softback(vc);
2178 }
2179
2180 if (logo_shown >= 0) {
2181 struct vc_data *conp2 = vc_cons[logo_shown].d;
2182
2183 if (conp2->vc_top == logo_lines
2184 && conp2->vc_bottom == conp2->vc_rows)
2185 conp2->vc_top = 0;
2186 logo_shown = FBCON_LOGO_CANSHOW;
2187 }
2188
2189 prev_console = ops->currcon;
2190 if (prev_console != -1)
2191 old_info = registered_fb[con2fb_map[prev_console]];
2192 /*
2193 * FIXME: If we have multiple fbdev's loaded, we need to
2194 * update all info->currcon. Perhaps, we can place this
2195 * in a centralized structure, but this might break some
2196 * drivers.
2197 *
2198 * info->currcon = vc->vc_num;
2199 */
2200 for (i = 0; i < FB_MAX; i++) {
2201 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2202 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2203
2204 o->currcon = vc->vc_num;
2205 }
2206 }
2207 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2208 display_to_var(&var, p);
2209 var.activate = FB_ACTIVATE_NOW;
2210
2211 /*
2212 * make sure we don't unnecessarily trip the memcmp()
2213 * in fb_set_var()
2214 */
2215 info->var.activate = var.activate;
2216 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2217 fb_set_var(info, &var);
2218 ops->var = info->var;
2219
2220 if (old_info != NULL && (old_info != info ||
2221 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2222 if (info->fbops->fb_set_par) {
2223 ret = info->fbops->fb_set_par(info);
2224
2225 if (ret)
2226 printk(KERN_ERR "fbcon_switch: detected "
2227 "unhandled fb_set_par error, "
2228 "error code %d\n", ret);
2229 }
2230
2231 if (old_info != info)
2232 fbcon_del_cursor_timer(old_info);
2233 }
2234
2235 if (fbcon_is_inactive(vc, info) ||
2236 ops->blank_state != FB_BLANK_UNBLANK)
2237 fbcon_del_cursor_timer(info);
2238 else
2239 fbcon_add_cursor_timer(info);
2240
2241 set_blitting_type(vc, info);
2242 ops->cursor_reset = 1;
2243
2244 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2245 ops->rotate = FB_ROTATE_UR;
2246 set_blitting_type(vc, info);
2247 }
2248
2249 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2250 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2251
2252 if (p->userfont)
2253 charcnt = FNTCHARCNT(vc->vc_font.data);
2254
2255 if (charcnt > 256)
2256 vc->vc_complement_mask <<= 1;
2257
2258 updatescrollmode(p, info, vc);
2259
2260 switch (p->scrollmode) {
2261 case SCROLL_WRAP_MOVE:
2262 scrollback_phys_max = p->vrows - vc->vc_rows;
2263 break;
2264 case SCROLL_PAN_MOVE:
2265 case SCROLL_PAN_REDRAW:
2266 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2267 if (scrollback_phys_max < 0)
2268 scrollback_phys_max = 0;
2269 break;
2270 default:
2271 scrollback_phys_max = 0;
2272 break;
2273 }
2274
2275 scrollback_max = 0;
2276 scrollback_current = 0;
2277
2278 if (!fbcon_is_inactive(vc, info)) {
2279 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2280 ops->update_start(info);
2281 }
2282
2283 fbcon_set_palette(vc, color_table);
2284 fbcon_clear_margins(vc, 0);
2285
2286 if (logo_shown == FBCON_LOGO_DRAW) {
2287
2288 logo_shown = fg_console;
2289 /* This is protected above by initmem_freed */
2290 fb_show_logo(info, ops->rotate);
2291 update_region(vc,
2292 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2293 vc->vc_size_row * (vc->vc_bottom -
2294 vc->vc_top) / 2);
2295 return 0;
2296 }
2297 return 1;
2298 }
2299
2300 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2301 int blank)
2302 {
2303 struct fb_event event;
2304
2305 if (blank) {
2306 unsigned short charmask = vc->vc_hi_font_mask ?
2307 0x1ff : 0xff;
2308 unsigned short oldc;
2309
2310 oldc = vc->vc_video_erase_char;
2311 vc->vc_video_erase_char &= charmask;
2312 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2313 vc->vc_video_erase_char = oldc;
2314 }
2315
2316
2317 if (!lock_fb_info(info))
2318 return;
2319 event.info = info;
2320 event.data = &blank;
2321 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2322 unlock_fb_info(info);
2323 }
2324
2325 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2326 {
2327 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2328 struct fbcon_ops *ops = info->fbcon_par;
2329
2330 if (mode_switch) {
2331 struct fb_var_screeninfo var = info->var;
2332
2333 ops->graphics = 1;
2334
2335 if (!blank) {
2336 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2337 fb_set_var(info, &var);
2338 ops->graphics = 0;
2339 ops->var = info->var;
2340 }
2341 }
2342
2343 if (!fbcon_is_inactive(vc, info)) {
2344 if (ops->blank_state != blank) {
2345 ops->blank_state = blank;
2346 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2347 ops->cursor_flash = (!blank);
2348
2349 if (!(info->flags & FBINFO_MISC_USEREVENT))
2350 if (fb_blank(info, blank))
2351 fbcon_generic_blank(vc, info, blank);
2352 }
2353
2354 if (!blank)
2355 update_screen(vc);
2356 }
2357
2358 if (mode_switch || fbcon_is_inactive(vc, info) ||
2359 ops->blank_state != FB_BLANK_UNBLANK)
2360 fbcon_del_cursor_timer(info);
2361 else
2362 fbcon_add_cursor_timer(info);
2363
2364 return 0;
2365 }
2366
2367 static int fbcon_debug_enter(struct vc_data *vc)
2368 {
2369 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2370 struct fbcon_ops *ops = info->fbcon_par;
2371
2372 ops->save_graphics = ops->graphics;
2373 ops->graphics = 0;
2374 if (info->fbops->fb_debug_enter)
2375 info->fbops->fb_debug_enter(info);
2376 fbcon_set_palette(vc, color_table);
2377 return 0;
2378 }
2379
2380 static int fbcon_debug_leave(struct vc_data *vc)
2381 {
2382 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2383 struct fbcon_ops *ops = info->fbcon_par;
2384
2385 ops->graphics = ops->save_graphics;
2386 if (info->fbops->fb_debug_leave)
2387 info->fbops->fb_debug_leave(info);
2388 return 0;
2389 }
2390
2391 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2392 {
2393 u8 *fontdata = vc->vc_font.data;
2394 u8 *data = font->data;
2395 int i, j;
2396
2397 font->width = vc->vc_font.width;
2398 font->height = vc->vc_font.height;
2399 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2400 if (!font->data)
2401 return 0;
2402
2403 if (font->width <= 8) {
2404 j = vc->vc_font.height;
2405 for (i = 0; i < font->charcount; i++) {
2406 memcpy(data, fontdata, j);
2407 memset(data + j, 0, 32 - j);
2408 data += 32;
2409 fontdata += j;
2410 }
2411 } else if (font->width <= 16) {
2412 j = vc->vc_font.height * 2;
2413 for (i = 0; i < font->charcount; i++) {
2414 memcpy(data, fontdata, j);
2415 memset(data + j, 0, 64 - j);
2416 data += 64;
2417 fontdata += j;
2418 }
2419 } else if (font->width <= 24) {
2420 for (i = 0; i < font->charcount; i++) {
2421 for (j = 0; j < vc->vc_font.height; j++) {
2422 *data++ = fontdata[0];
2423 *data++ = fontdata[1];
2424 *data++ = fontdata[2];
2425 fontdata += sizeof(u32);
2426 }
2427 memset(data, 0, 3 * (32 - j));
2428 data += 3 * (32 - j);
2429 }
2430 } else {
2431 j = vc->vc_font.height * 4;
2432 for (i = 0; i < font->charcount; i++) {
2433 memcpy(data, fontdata, j);
2434 memset(data + j, 0, 128 - j);
2435 data += 128;
2436 fontdata += j;
2437 }
2438 }
2439 return 0;
2440 }
2441
2442 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2443 static void set_vc_hi_font(struct vc_data *vc, bool set)
2444 {
2445 if (!set) {
2446 vc->vc_hi_font_mask = 0;
2447 if (vc->vc_can_do_color) {
2448 vc->vc_complement_mask >>= 1;
2449 vc->vc_s_complement_mask >>= 1;
2450 }
2451
2452 /* ++Edmund: reorder the attribute bits */
2453 if (vc->vc_can_do_color) {
2454 unsigned short *cp =
2455 (unsigned short *) vc->vc_origin;
2456 int count = vc->vc_screenbuf_size / 2;
2457 unsigned short c;
2458 for (; count > 0; count--, cp++) {
2459 c = scr_readw(cp);
2460 scr_writew(((c & 0xfe00) >> 1) |
2461 (c & 0xff), cp);
2462 }
2463 c = vc->vc_video_erase_char;
2464 vc->vc_video_erase_char =
2465 ((c & 0xfe00) >> 1) | (c & 0xff);
2466 vc->vc_attr >>= 1;
2467 }
2468 } else {
2469 vc->vc_hi_font_mask = 0x100;
2470 if (vc->vc_can_do_color) {
2471 vc->vc_complement_mask <<= 1;
2472 vc->vc_s_complement_mask <<= 1;
2473 }
2474
2475 /* ++Edmund: reorder the attribute bits */
2476 {
2477 unsigned short *cp =
2478 (unsigned short *) vc->vc_origin;
2479 int count = vc->vc_screenbuf_size / 2;
2480 unsigned short c;
2481 for (; count > 0; count--, cp++) {
2482 unsigned short newc;
2483 c = scr_readw(cp);
2484 if (vc->vc_can_do_color)
2485 newc =
2486 ((c & 0xff00) << 1) | (c &
2487 0xff);
2488 else
2489 newc = c & ~0x100;
2490 scr_writew(newc, cp);
2491 }
2492 c = vc->vc_video_erase_char;
2493 if (vc->vc_can_do_color) {
2494 vc->vc_video_erase_char =
2495 ((c & 0xff00) << 1) | (c & 0xff);
2496 vc->vc_attr <<= 1;
2497 } else
2498 vc->vc_video_erase_char = c & ~0x100;
2499 }
2500 }
2501 }
2502
2503 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2504 const u8 * data, int userfont)
2505 {
2506 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2507 struct fbcon_ops *ops = info->fbcon_par;
2508 struct display *p = &fb_display[vc->vc_num];
2509 int resize;
2510 int cnt;
2511 char *old_data = NULL;
2512
2513 if (con_is_visible(vc) && softback_lines)
2514 fbcon_set_origin(vc);
2515
2516 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2517 if (p->userfont)
2518 old_data = vc->vc_font.data;
2519 if (userfont)
2520 cnt = FNTCHARCNT(data);
2521 else
2522 cnt = 256;
2523 vc->vc_font.data = (void *)(p->fontdata = data);
2524 if ((p->userfont = userfont))
2525 REFCOUNT(data)++;
2526 vc->vc_font.width = w;
2527 vc->vc_font.height = h;
2528 if (vc->vc_hi_font_mask && cnt == 256)
2529 set_vc_hi_font(vc, false);
2530 else if (!vc->vc_hi_font_mask && cnt == 512)
2531 set_vc_hi_font(vc, true);
2532
2533 if (resize) {
2534 int cols, rows;
2535
2536 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2537 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2538 cols /= w;
2539 rows /= h;
2540 vc_resize(vc, cols, rows);
2541 if (con_is_visible(vc) && softback_buf)
2542 fbcon_update_softback(vc);
2543 } else if (con_is_visible(vc)
2544 && vc->vc_mode == KD_TEXT) {
2545 fbcon_clear_margins(vc, 0);
2546 update_screen(vc);
2547 }
2548
2549 if (old_data && (--REFCOUNT(old_data) == 0))
2550 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2551 return 0;
2552 }
2553
2554 static int fbcon_copy_font(struct vc_data *vc, int con)
2555 {
2556 struct display *od = &fb_display[con];
2557 struct console_font *f = &vc->vc_font;
2558
2559 if (od->fontdata == f->data)
2560 return 0; /* already the same font... */
2561 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2562 }
2563
2564 /*
2565 * User asked to set font; we are guaranteed that
2566 * a) width and height are in range 1..32
2567 * b) charcount does not exceed 512
2568 * but lets not assume that, since someone might someday want to use larger
2569 * fonts. And charcount of 512 is small for unicode support.
2570 *
2571 * However, user space gives the font in 32 rows , regardless of
2572 * actual font height. So a new API is needed if support for larger fonts
2573 * is ever implemented.
2574 */
2575
2576 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2577 {
2578 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2579 unsigned charcount = font->charcount;
2580 int w = font->width;
2581 int h = font->height;
2582 int size;
2583 int i, csum;
2584 u8 *new_data, *data = font->data;
2585 int pitch = (font->width+7) >> 3;
2586
2587 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2588 * If not this check should be changed to charcount < 256 */
2589 if (charcount != 256 && charcount != 512)
2590 return -EINVAL;
2591
2592 /* Make sure drawing engine can handle the font */
2593 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2594 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2595 return -EINVAL;
2596
2597 /* Make sure driver can handle the font length */
2598 if (fbcon_invalid_charcount(info, charcount))
2599 return -EINVAL;
2600
2601 size = h * pitch * charcount;
2602
2603 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2604
2605 if (!new_data)
2606 return -ENOMEM;
2607
2608 new_data += FONT_EXTRA_WORDS * sizeof(int);
2609 FNTSIZE(new_data) = size;
2610 FNTCHARCNT(new_data) = charcount;
2611 REFCOUNT(new_data) = 0; /* usage counter */
2612 for (i=0; i< charcount; i++) {
2613 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2614 }
2615
2616 /* Since linux has a nice crc32 function use it for counting font
2617 * checksums. */
2618 csum = crc32(0, new_data, size);
2619
2620 FNTSUM(new_data) = csum;
2621 /* Check if the same font is on some other console already */
2622 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2623 struct vc_data *tmp = vc_cons[i].d;
2624
2625 if (fb_display[i].userfont &&
2626 fb_display[i].fontdata &&
2627 FNTSUM(fb_display[i].fontdata) == csum &&
2628 FNTSIZE(fb_display[i].fontdata) == size &&
2629 tmp->vc_font.width == w &&
2630 !memcmp(fb_display[i].fontdata, new_data, size)) {
2631 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2632 new_data = (u8 *)fb_display[i].fontdata;
2633 break;
2634 }
2635 }
2636 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2637 }
2638
2639 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2640 {
2641 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2642 const struct font_desc *f;
2643
2644 if (!name)
2645 f = get_default_font(info->var.xres, info->var.yres,
2646 info->pixmap.blit_x, info->pixmap.blit_y);
2647 else if (!(f = find_font(name)))
2648 return -ENOENT;
2649
2650 font->width = f->width;
2651 font->height = f->height;
2652 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2653 }
2654
2655 static u16 palette_red[16];
2656 static u16 palette_green[16];
2657 static u16 palette_blue[16];
2658
2659 static struct fb_cmap palette_cmap = {
2660 0, 16, palette_red, palette_green, palette_blue, NULL
2661 };
2662
2663 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2664 {
2665 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2666 int i, j, k, depth;
2667 u8 val;
2668
2669 if (fbcon_is_inactive(vc, info))
2670 return;
2671
2672 if (!con_is_visible(vc))
2673 return;
2674
2675 depth = fb_get_color_depth(&info->var, &info->fix);
2676 if (depth > 3) {
2677 for (i = j = 0; i < 16; i++) {
2678 k = table[i];
2679 val = vc->vc_palette[j++];
2680 palette_red[k] = (val << 8) | val;
2681 val = vc->vc_palette[j++];
2682 palette_green[k] = (val << 8) | val;
2683 val = vc->vc_palette[j++];
2684 palette_blue[k] = (val << 8) | val;
2685 }
2686 palette_cmap.len = 16;
2687 palette_cmap.start = 0;
2688 /*
2689 * If framebuffer is capable of less than 16 colors,
2690 * use default palette of fbcon.
2691 */
2692 } else
2693 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2694
2695 fb_set_cmap(&palette_cmap, info);
2696 }
2697
2698 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2699 {
2700 unsigned long p;
2701 int line;
2702
2703 if (vc->vc_num != fg_console || !softback_lines)
2704 return (u16 *) (vc->vc_origin + offset);
2705 line = offset / vc->vc_size_row;
2706 if (line >= softback_lines)
2707 return (u16 *) (vc->vc_origin + offset -
2708 softback_lines * vc->vc_size_row);
2709 p = softback_curr + offset;
2710 if (p >= softback_end)
2711 p += softback_buf - softback_end;
2712 return (u16 *) p;
2713 }
2714
2715 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2716 int *px, int *py)
2717 {
2718 unsigned long ret;
2719 int x, y;
2720
2721 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2722 unsigned long offset = (pos - vc->vc_origin) / 2;
2723
2724 x = offset % vc->vc_cols;
2725 y = offset / vc->vc_cols;
2726 if (vc->vc_num == fg_console)
2727 y += softback_lines;
2728 ret = pos + (vc->vc_cols - x) * 2;
2729 } else if (vc->vc_num == fg_console && softback_lines) {
2730 unsigned long offset = pos - softback_curr;
2731
2732 if (pos < softback_curr)
2733 offset += softback_end - softback_buf;
2734 offset /= 2;
2735 x = offset % vc->vc_cols;
2736 y = offset / vc->vc_cols;
2737 ret = pos + (vc->vc_cols - x) * 2;
2738 if (ret == softback_end)
2739 ret = softback_buf;
2740 if (ret == softback_in)
2741 ret = vc->vc_origin;
2742 } else {
2743 /* Should not happen */
2744 x = y = 0;
2745 ret = vc->vc_origin;
2746 }
2747 if (px)
2748 *px = x;
2749 if (py)
2750 *py = y;
2751 return ret;
2752 }
2753
2754 /* As we might be inside of softback, we may work with non-contiguous buffer,
2755 that's why we have to use a separate routine. */
2756 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2757 {
2758 while (cnt--) {
2759 u16 a = scr_readw(p);
2760 if (!vc->vc_can_do_color)
2761 a ^= 0x0800;
2762 else if (vc->vc_hi_font_mask == 0x100)
2763 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2764 (((a) & 0x0e00) << 4);
2765 else
2766 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2767 (((a) & 0x0700) << 4);
2768 scr_writew(a, p++);
2769 if (p == (u16 *) softback_end)
2770 p = (u16 *) softback_buf;
2771 if (p == (u16 *) softback_in)
2772 p = (u16 *) vc->vc_origin;
2773 }
2774 }
2775
2776 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2777 {
2778 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2779 struct fbcon_ops *ops = info->fbcon_par;
2780 struct display *disp = &fb_display[fg_console];
2781 int offset, limit, scrollback_old;
2782
2783 if (softback_top) {
2784 if (vc->vc_num != fg_console)
2785 return;
2786 if (vc->vc_mode != KD_TEXT || !lines)
2787 return;
2788 if (logo_shown >= 0) {
2789 struct vc_data *conp2 = vc_cons[logo_shown].d;
2790
2791 if (conp2->vc_top == logo_lines
2792 && conp2->vc_bottom == conp2->vc_rows)
2793 conp2->vc_top = 0;
2794 if (logo_shown == vc->vc_num) {
2795 unsigned long p, q;
2796 int i;
2797
2798 p = softback_in;
2799 q = vc->vc_origin +
2800 logo_lines * vc->vc_size_row;
2801 for (i = 0; i < logo_lines; i++) {
2802 if (p == softback_top)
2803 break;
2804 if (p == softback_buf)
2805 p = softback_end;
2806 p -= vc->vc_size_row;
2807 q -= vc->vc_size_row;
2808 scr_memcpyw((u16 *) q, (u16 *) p,
2809 vc->vc_size_row);
2810 }
2811 softback_in = softback_curr = p;
2812 update_region(vc, vc->vc_origin,
2813 logo_lines * vc->vc_cols);
2814 }
2815 logo_shown = FBCON_LOGO_CANSHOW;
2816 }
2817 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2818 fbcon_redraw_softback(vc, disp, lines);
2819 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2820 return;
2821 }
2822
2823 if (!scrollback_phys_max)
2824 return;
2825
2826 scrollback_old = scrollback_current;
2827 scrollback_current -= lines;
2828 if (scrollback_current < 0)
2829 scrollback_current = 0;
2830 else if (scrollback_current > scrollback_max)
2831 scrollback_current = scrollback_max;
2832 if (scrollback_current == scrollback_old)
2833 return;
2834
2835 if (fbcon_is_inactive(vc, info))
2836 return;
2837
2838 fbcon_cursor(vc, CM_ERASE);
2839
2840 offset = disp->yscroll - scrollback_current;
2841 limit = disp->vrows;
2842 switch (disp->scrollmode) {
2843 case SCROLL_WRAP_MOVE:
2844 info->var.vmode |= FB_VMODE_YWRAP;
2845 break;
2846 case SCROLL_PAN_MOVE:
2847 case SCROLL_PAN_REDRAW:
2848 limit -= vc->vc_rows;
2849 info->var.vmode &= ~FB_VMODE_YWRAP;
2850 break;
2851 }
2852 if (offset < 0)
2853 offset += limit;
2854 else if (offset >= limit)
2855 offset -= limit;
2856
2857 ops->var.xoffset = 0;
2858 ops->var.yoffset = offset * vc->vc_font.height;
2859 ops->update_start(info);
2860
2861 if (!scrollback_current)
2862 fbcon_cursor(vc, CM_DRAW);
2863 }
2864
2865 static int fbcon_set_origin(struct vc_data *vc)
2866 {
2867 if (softback_lines)
2868 fbcon_scrolldelta(vc, softback_lines);
2869 return 0;
2870 }
2871
2872 static void fbcon_suspended(struct fb_info *info)
2873 {
2874 struct vc_data *vc = NULL;
2875 struct fbcon_ops *ops = info->fbcon_par;
2876
2877 if (!ops || ops->currcon < 0)
2878 return;
2879 vc = vc_cons[ops->currcon].d;
2880
2881 /* Clear cursor, restore saved data */
2882 fbcon_cursor(vc, CM_ERASE);
2883 }
2884
2885 static void fbcon_resumed(struct fb_info *info)
2886 {
2887 struct vc_data *vc;
2888 struct fbcon_ops *ops = info->fbcon_par;
2889
2890 if (!ops || ops->currcon < 0)
2891 return;
2892 vc = vc_cons[ops->currcon].d;
2893
2894 update_screen(vc);
2895 }
2896
2897 static void fbcon_modechanged(struct fb_info *info)
2898 {
2899 struct fbcon_ops *ops = info->fbcon_par;
2900 struct vc_data *vc;
2901 struct display *p;
2902 int rows, cols;
2903
2904 if (!ops || ops->currcon < 0)
2905 return;
2906 vc = vc_cons[ops->currcon].d;
2907 if (vc->vc_mode != KD_TEXT ||
2908 registered_fb[con2fb_map[ops->currcon]] != info)
2909 return;
2910
2911 p = &fb_display[vc->vc_num];
2912 set_blitting_type(vc, info);
2913
2914 if (con_is_visible(vc)) {
2915 var_to_display(p, &info->var, info);
2916 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2917 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2918 cols /= vc->vc_font.width;
2919 rows /= vc->vc_font.height;
2920 vc_resize(vc, cols, rows);
2921 updatescrollmode(p, info, vc);
2922 scrollback_max = 0;
2923 scrollback_current = 0;
2924
2925 if (!fbcon_is_inactive(vc, info)) {
2926 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2927 ops->update_start(info);
2928 }
2929
2930 fbcon_set_palette(vc, color_table);
2931 update_screen(vc);
2932 if (softback_buf)
2933 fbcon_update_softback(vc);
2934 }
2935 }
2936
2937 static void fbcon_set_all_vcs(struct fb_info *info)
2938 {
2939 struct fbcon_ops *ops = info->fbcon_par;
2940 struct vc_data *vc;
2941 struct display *p;
2942 int i, rows, cols, fg = -1;
2943
2944 if (!ops || ops->currcon < 0)
2945 return;
2946
2947 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2948 vc = vc_cons[i].d;
2949 if (!vc || vc->vc_mode != KD_TEXT ||
2950 registered_fb[con2fb_map[i]] != info)
2951 continue;
2952
2953 if (con_is_visible(vc)) {
2954 fg = i;
2955 continue;
2956 }
2957
2958 p = &fb_display[vc->vc_num];
2959 set_blitting_type(vc, info);
2960 var_to_display(p, &info->var, info);
2961 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2962 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2963 cols /= vc->vc_font.width;
2964 rows /= vc->vc_font.height;
2965 vc_resize(vc, cols, rows);
2966 }
2967
2968 if (fg != -1)
2969 fbcon_modechanged(info);
2970 }
2971
2972 static int fbcon_mode_deleted(struct fb_info *info,
2973 struct fb_videomode *mode)
2974 {
2975 struct fb_info *fb_info;
2976 struct display *p;
2977 int i, j, found = 0;
2978
2979 /* before deletion, ensure that mode is not in use */
2980 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2981 j = con2fb_map[i];
2982 if (j == -1)
2983 continue;
2984 fb_info = registered_fb[j];
2985 if (fb_info != info)
2986 continue;
2987 p = &fb_display[i];
2988 if (!p || !p->mode)
2989 continue;
2990 if (fb_mode_is_equal(p->mode, mode)) {
2991 found = 1;
2992 break;
2993 }
2994 }
2995 return found;
2996 }
2997
2998 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2999 static int fbcon_unbind(void)
3000 {
3001 int ret;
3002
3003 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3004 fbcon_is_default);
3005
3006 if (!ret)
3007 fbcon_has_console_bind = 0;
3008
3009 return ret;
3010 }
3011 #else
3012 static inline int fbcon_unbind(void)
3013 {
3014 return -EINVAL;
3015 }
3016 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3017
3018 /* called with console_lock held */
3019 static int fbcon_fb_unbind(int idx)
3020 {
3021 int i, new_idx = -1, ret = 0;
3022
3023 if (!fbcon_has_console_bind)
3024 return 0;
3025
3026 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3027 if (con2fb_map[i] != idx &&
3028 con2fb_map[i] != -1) {
3029 new_idx = i;
3030 break;
3031 }
3032 }
3033
3034 if (new_idx != -1) {
3035 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3036 if (con2fb_map[i] == idx)
3037 set_con2fb_map(i, new_idx, 0);
3038 }
3039 } else {
3040 struct fb_info *info = registered_fb[idx];
3041
3042 /* This is sort of like set_con2fb_map, except it maps
3043 * the consoles to no device and then releases the
3044 * oldinfo to free memory and cancel the cursor blink
3045 * timer. I can imagine this just becoming part of
3046 * set_con2fb_map where new_idx is -1
3047 */
3048 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3049 if (con2fb_map[i] == idx) {
3050 con2fb_map[i] = -1;
3051 if (!search_fb_in_map(idx)) {
3052 ret = con2fb_release_oldinfo(vc_cons[i].d,
3053 info, NULL, i,
3054 idx, 0);
3055 if (ret) {
3056 con2fb_map[i] = idx;
3057 return ret;
3058 }
3059 }
3060 }
3061 }
3062 ret = fbcon_unbind();
3063 }
3064
3065 return ret;
3066 }
3067
3068 /* called with console_lock held */
3069 static int fbcon_fb_unregistered(struct fb_info *info)
3070 {
3071 int i, idx;
3072
3073 idx = info->node;
3074 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3075 if (con2fb_map[i] == idx)
3076 con2fb_map[i] = -1;
3077 }
3078
3079 if (idx == info_idx) {
3080 info_idx = -1;
3081
3082 for (i = 0; i < FB_MAX; i++) {
3083 if (registered_fb[i] != NULL) {
3084 info_idx = i;
3085 break;
3086 }
3087 }
3088 }
3089
3090 if (info_idx != -1) {
3091 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3092 if (con2fb_map[i] == -1)
3093 con2fb_map[i] = info_idx;
3094 }
3095 }
3096
3097 if (primary_device == idx)
3098 primary_device = -1;
3099
3100 if (!num_registered_fb)
3101 do_unregister_con_driver(&fb_con);
3102
3103 return 0;
3104 }
3105
3106 /* called with console_lock held */
3107 static void fbcon_remap_all(int idx)
3108 {
3109 int i;
3110 for (i = first_fb_vc; i <= last_fb_vc; i++)
3111 set_con2fb_map(i, idx, 0);
3112
3113 if (con_is_bound(&fb_con)) {
3114 printk(KERN_INFO "fbcon: Remapping primary device, "
3115 "fb%i, to tty %i-%i\n", idx,
3116 first_fb_vc + 1, last_fb_vc + 1);
3117 info_idx = idx;
3118 }
3119 }
3120
3121 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3122 static void fbcon_select_primary(struct fb_info *info)
3123 {
3124 if (!map_override && primary_device == -1 &&
3125 fb_is_primary_device(info)) {
3126 int i;
3127
3128 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3129 info->fix.id, info->node);
3130 primary_device = info->node;
3131
3132 for (i = first_fb_vc; i <= last_fb_vc; i++)
3133 con2fb_map_boot[i] = primary_device;
3134
3135 if (con_is_bound(&fb_con)) {
3136 printk(KERN_INFO "fbcon: Remapping primary device, "
3137 "fb%i, to tty %i-%i\n", info->node,
3138 first_fb_vc + 1, last_fb_vc + 1);
3139 info_idx = primary_device;
3140 }
3141 }
3142
3143 }
3144 #else
3145 static inline void fbcon_select_primary(struct fb_info *info)
3146 {
3147 return;
3148 }
3149 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3150
3151 /* called with console_lock held */
3152 static int fbcon_fb_registered(struct fb_info *info)
3153 {
3154 int ret = 0, i, idx;
3155
3156 idx = info->node;
3157 fbcon_select_primary(info);
3158
3159 if (info_idx == -1) {
3160 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3161 if (con2fb_map_boot[i] == idx) {
3162 info_idx = idx;
3163 break;
3164 }
3165 }
3166
3167 if (info_idx != -1)
3168 ret = do_fbcon_takeover(1);
3169 } else {
3170 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3171 if (con2fb_map_boot[i] == idx)
3172 set_con2fb_map(i, idx, 0);
3173 }
3174 }
3175
3176 return ret;
3177 }
3178
3179 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3180 {
3181 struct fbcon_ops *ops = info->fbcon_par;
3182 struct vc_data *vc;
3183
3184 if (!ops || ops->currcon < 0)
3185 return;
3186
3187 vc = vc_cons[ops->currcon].d;
3188 if (vc->vc_mode != KD_TEXT ||
3189 registered_fb[con2fb_map[ops->currcon]] != info)
3190 return;
3191
3192 if (con_is_visible(vc)) {
3193 if (blank)
3194 do_blank_screen(0);
3195 else
3196 do_unblank_screen(0);
3197 }
3198 ops->blank_state = blank;
3199 }
3200
3201 static void fbcon_new_modelist(struct fb_info *info)
3202 {
3203 int i;
3204 struct vc_data *vc;
3205 struct fb_var_screeninfo var;
3206 const struct fb_videomode *mode;
3207
3208 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3209 if (registered_fb[con2fb_map[i]] != info)
3210 continue;
3211 if (!fb_display[i].mode)
3212 continue;
3213 vc = vc_cons[i].d;
3214 display_to_var(&var, &fb_display[i]);
3215 mode = fb_find_nearest_mode(fb_display[i].mode,
3216 &info->modelist);
3217 fb_videomode_to_var(&var, mode);
3218 fbcon_set_disp(info, &var, vc->vc_num);
3219 }
3220 }
3221
3222 static void fbcon_get_requirement(struct fb_info *info,
3223 struct fb_blit_caps *caps)
3224 {
3225 struct vc_data *vc;
3226 struct display *p;
3227
3228 if (caps->flags) {
3229 int i, charcnt;
3230
3231 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3232 vc = vc_cons[i].d;
3233 if (vc && vc->vc_mode == KD_TEXT &&
3234 info->node == con2fb_map[i]) {
3235 p = &fb_display[i];
3236 caps->x |= 1 << (vc->vc_font.width - 1);
3237 caps->y |= 1 << (vc->vc_font.height - 1);
3238 charcnt = (p->userfont) ?
3239 FNTCHARCNT(p->fontdata) : 256;
3240 if (caps->len < charcnt)
3241 caps->len = charcnt;
3242 }
3243 }
3244 } else {
3245 vc = vc_cons[fg_console].d;
3246
3247 if (vc && vc->vc_mode == KD_TEXT &&
3248 info->node == con2fb_map[fg_console]) {
3249 p = &fb_display[fg_console];
3250 caps->x = 1 << (vc->vc_font.width - 1);
3251 caps->y = 1 << (vc->vc_font.height - 1);
3252 caps->len = (p->userfont) ?
3253 FNTCHARCNT(p->fontdata) : 256;
3254 }
3255 }
3256 }
3257
3258 static int fbcon_event_notify(struct notifier_block *self,
3259 unsigned long action, void *data)
3260 {
3261 struct fb_event *event = data;
3262 struct fb_info *info = event->info;
3263 struct fb_videomode *mode;
3264 struct fb_con2fbmap *con2fb;
3265 struct fb_blit_caps *caps;
3266 int idx, ret = 0;
3267
3268 /*
3269 * ignore all events except driver registration and deregistration
3270 * if fbcon is not active
3271 */
3272 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3273 action == FB_EVENT_FB_UNREGISTERED))
3274 goto done;
3275
3276 switch(action) {
3277 case FB_EVENT_SUSPEND:
3278 fbcon_suspended(info);
3279 break;
3280 case FB_EVENT_RESUME:
3281 fbcon_resumed(info);
3282 break;
3283 case FB_EVENT_MODE_CHANGE:
3284 fbcon_modechanged(info);
3285 break;
3286 case FB_EVENT_MODE_CHANGE_ALL:
3287 fbcon_set_all_vcs(info);
3288 break;
3289 case FB_EVENT_MODE_DELETE:
3290 mode = event->data;
3291 ret = fbcon_mode_deleted(info, mode);
3292 break;
3293 case FB_EVENT_FB_UNBIND:
3294 idx = info->node;
3295 ret = fbcon_fb_unbind(idx);
3296 break;
3297 case FB_EVENT_FB_REGISTERED:
3298 ret = fbcon_fb_registered(info);
3299 break;
3300 case FB_EVENT_FB_UNREGISTERED:
3301 ret = fbcon_fb_unregistered(info);
3302 break;
3303 case FB_EVENT_SET_CONSOLE_MAP:
3304 /* called with console lock held */
3305 con2fb = event->data;
3306 ret = set_con2fb_map(con2fb->console - 1,
3307 con2fb->framebuffer, 1);
3308 break;
3309 case FB_EVENT_GET_CONSOLE_MAP:
3310 con2fb = event->data;
3311 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3312 break;
3313 case FB_EVENT_BLANK:
3314 fbcon_fb_blanked(info, *(int *)event->data);
3315 break;
3316 case FB_EVENT_NEW_MODELIST:
3317 fbcon_new_modelist(info);
3318 break;
3319 case FB_EVENT_GET_REQ:
3320 caps = event->data;
3321 fbcon_get_requirement(info, caps);
3322 break;
3323 case FB_EVENT_REMAP_ALL_CONSOLE:
3324 idx = info->node;
3325 fbcon_remap_all(idx);
3326 break;
3327 }
3328 done:
3329 return ret;
3330 }
3331
3332 /*
3333 * The console `switch' structure for the frame buffer based console
3334 */
3335
3336 static const struct consw fb_con = {
3337 .owner = THIS_MODULE,
3338 .con_startup = fbcon_startup,
3339 .con_init = fbcon_init,
3340 .con_deinit = fbcon_deinit,
3341 .con_clear = fbcon_clear,
3342 .con_putc = fbcon_putc,
3343 .con_putcs = fbcon_putcs,
3344 .con_cursor = fbcon_cursor,
3345 .con_scroll = fbcon_scroll,
3346 .con_switch = fbcon_switch,
3347 .con_blank = fbcon_blank,
3348 .con_font_set = fbcon_set_font,
3349 .con_font_get = fbcon_get_font,
3350 .con_font_default = fbcon_set_def_font,
3351 .con_font_copy = fbcon_copy_font,
3352 .con_set_palette = fbcon_set_palette,
3353 .con_scrolldelta = fbcon_scrolldelta,
3354 .con_set_origin = fbcon_set_origin,
3355 .con_invert_region = fbcon_invert_region,
3356 .con_screen_pos = fbcon_screen_pos,
3357 .con_getxy = fbcon_getxy,
3358 .con_resize = fbcon_resize,
3359 .con_debug_enter = fbcon_debug_enter,
3360 .con_debug_leave = fbcon_debug_leave,
3361 };
3362
3363 static struct notifier_block fbcon_event_notifier = {
3364 .notifier_call = fbcon_event_notify,
3365 };
3366
3367 static ssize_t store_rotate(struct device *device,
3368 struct device_attribute *attr, const char *buf,
3369 size_t count)
3370 {
3371 struct fb_info *info;
3372 int rotate, idx;
3373 char **last = NULL;
3374
3375 if (fbcon_has_exited)
3376 return count;
3377
3378 console_lock();
3379 idx = con2fb_map[fg_console];
3380
3381 if (idx == -1 || registered_fb[idx] == NULL)
3382 goto err;
3383
3384 info = registered_fb[idx];
3385 rotate = simple_strtoul(buf, last, 0);
3386 fbcon_rotate(info, rotate);
3387 err:
3388 console_unlock();
3389 return count;
3390 }
3391
3392 static ssize_t store_rotate_all(struct device *device,
3393 struct device_attribute *attr,const char *buf,
3394 size_t count)
3395 {
3396 struct fb_info *info;
3397 int rotate, idx;
3398 char **last = NULL;
3399
3400 if (fbcon_has_exited)
3401 return count;
3402
3403 console_lock();
3404 idx = con2fb_map[fg_console];
3405
3406 if (idx == -1 || registered_fb[idx] == NULL)
3407 goto err;
3408
3409 info = registered_fb[idx];
3410 rotate = simple_strtoul(buf, last, 0);
3411 fbcon_rotate_all(info, rotate);
3412 err:
3413 console_unlock();
3414 return count;
3415 }
3416
3417 static ssize_t show_rotate(struct device *device,
3418 struct device_attribute *attr,char *buf)
3419 {
3420 struct fb_info *info;
3421 int rotate = 0, idx;
3422
3423 if (fbcon_has_exited)
3424 return 0;
3425
3426 console_lock();
3427 idx = con2fb_map[fg_console];
3428
3429 if (idx == -1 || registered_fb[idx] == NULL)
3430 goto err;
3431
3432 info = registered_fb[idx];
3433 rotate = fbcon_get_rotate(info);
3434 err:
3435 console_unlock();
3436 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3437 }
3438
3439 static ssize_t show_cursor_blink(struct device *device,
3440 struct device_attribute *attr, char *buf)
3441 {
3442 struct fb_info *info;
3443 struct fbcon_ops *ops;
3444 int idx, blink = -1;
3445
3446 if (fbcon_has_exited)
3447 return 0;
3448
3449 console_lock();
3450 idx = con2fb_map[fg_console];
3451
3452 if (idx == -1 || registered_fb[idx] == NULL)
3453 goto err;
3454
3455 info = registered_fb[idx];
3456 ops = info->fbcon_par;
3457
3458 if (!ops)
3459 goto err;
3460
3461 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3462 err:
3463 console_unlock();
3464 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3465 }
3466
3467 static ssize_t store_cursor_blink(struct device *device,
3468 struct device_attribute *attr,
3469 const char *buf, size_t count)
3470 {
3471 struct fb_info *info;
3472 int blink, idx;
3473 char **last = NULL;
3474
3475 if (fbcon_has_exited)
3476 return count;
3477
3478 console_lock();
3479 idx = con2fb_map[fg_console];
3480
3481 if (idx == -1 || registered_fb[idx] == NULL)
3482 goto err;
3483
3484 info = registered_fb[idx];
3485
3486 if (!info->fbcon_par)
3487 goto err;
3488
3489 blink = simple_strtoul(buf, last, 0);
3490
3491 if (blink) {
3492 fbcon_cursor_noblink = 0;
3493 fbcon_add_cursor_timer(info);
3494 } else {
3495 fbcon_cursor_noblink = 1;
3496 fbcon_del_cursor_timer(info);
3497 }
3498
3499 err:
3500 console_unlock();
3501 return count;
3502 }
3503
3504 static struct device_attribute device_attrs[] = {
3505 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3506 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3507 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3508 store_cursor_blink),
3509 };
3510
3511 static int fbcon_init_device(void)
3512 {
3513 int i, error = 0;
3514
3515 fbcon_has_sysfs = 1;
3516
3517 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3518 error = device_create_file(fbcon_device, &device_attrs[i]);
3519
3520 if (error)
3521 break;
3522 }
3523
3524 if (error) {
3525 while (--i >= 0)
3526 device_remove_file(fbcon_device, &device_attrs[i]);
3527
3528 fbcon_has_sysfs = 0;
3529 }
3530
3531 return 0;
3532 }
3533
3534 static void fbcon_start(void)
3535 {
3536 if (num_registered_fb) {
3537 int i;
3538
3539 console_lock();
3540
3541 for (i = 0; i < FB_MAX; i++) {
3542 if (registered_fb[i] != NULL) {
3543 info_idx = i;
3544 break;
3545 }
3546 }
3547
3548 do_fbcon_takeover(0);
3549 console_unlock();
3550
3551 }
3552 }
3553
3554 static void fbcon_exit(void)
3555 {
3556 struct fb_info *info;
3557 int i, j, mapped;
3558
3559 if (fbcon_has_exited)
3560 return;
3561
3562 kfree((void *)softback_buf);
3563 softback_buf = 0UL;
3564
3565 for (i = 0; i < FB_MAX; i++) {
3566 int pending = 0;
3567
3568 mapped = 0;
3569 info = registered_fb[i];
3570
3571 if (info == NULL)
3572 continue;
3573
3574 if (info->queue.func)
3575 pending = cancel_work_sync(&info->queue);
3576 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3577 "no"));
3578
3579 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3580 if (con2fb_map[j] == i) {
3581 mapped = 1;
3582 break;
3583 }
3584 }
3585
3586 if (mapped) {
3587 if (info->fbops->fb_release)
3588 info->fbops->fb_release(info, 0);
3589 module_put(info->fbops->owner);
3590
3591 if (info->fbcon_par) {
3592 struct fbcon_ops *ops = info->fbcon_par;
3593
3594 fbcon_del_cursor_timer(info);
3595 kfree(ops->cursor_src);
3596 kfree(ops->cursor_state.mask);
3597 kfree(info->fbcon_par);
3598 info->fbcon_par = NULL;
3599 }
3600
3601 if (info->queue.func == fb_flashcursor)
3602 info->queue.func = NULL;
3603 }
3604 }
3605
3606 fbcon_has_exited = 1;
3607 }
3608
3609 static int __init fb_console_init(void)
3610 {
3611 int i;
3612
3613 console_lock();
3614 fb_register_client(&fbcon_event_notifier);
3615 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3616 "fbcon");
3617
3618 if (IS_ERR(fbcon_device)) {
3619 printk(KERN_WARNING "Unable to create device "
3620 "for fbcon; errno = %ld\n",
3621 PTR_ERR(fbcon_device));
3622 fbcon_device = NULL;
3623 } else
3624 fbcon_init_device();
3625
3626 for (i = 0; i < MAX_NR_CONSOLES; i++)
3627 con2fb_map[i] = -1;
3628
3629 console_unlock();
3630 fbcon_start();
3631 return 0;
3632 }
3633
3634 fs_initcall(fb_console_init);
3635
3636 #ifdef MODULE
3637
3638 static void __exit fbcon_deinit_device(void)
3639 {
3640 int i;
3641
3642 if (fbcon_has_sysfs) {
3643 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3644 device_remove_file(fbcon_device, &device_attrs[i]);
3645
3646 fbcon_has_sysfs = 0;
3647 }
3648 }
3649
3650 static void __exit fb_console_exit(void)
3651 {
3652 console_lock();
3653 fb_unregister_client(&fbcon_event_notifier);
3654 fbcon_deinit_device();
3655 device_destroy(fb_class, MKDEV(0, 0));
3656 fbcon_exit();
3657 do_unregister_con_driver(&fb_con);
3658 console_unlock();
3659 }
3660
3661 module_exit(fb_console_exit);
3662
3663 #endif
3664
3665 MODULE_LICENSE("GPL");
Linux with added FPC-III support