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Merge branch 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[mirror_ubuntu-jammy-kernel.git] / drivers / video / console / fbcon.c
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80
81 #include "fbcon.h"
82
83 #ifdef FBCONDEBUG
84 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
85 #else
86 # define DPRINTK(fmt, args...)
87 #endif
88
89 enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93 };
94
95 static struct display fb_display[MAX_NR_CONSOLES];
96
97 static signed char con2fb_map[MAX_NR_CONSOLES];
98 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
99
100 static int logo_lines;
101 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103 static int logo_shown = FBCON_LOGO_CANSHOW;
104 /* Software scrollback */
105 static int fbcon_softback_size = 32768;
106 static unsigned long softback_buf, softback_curr;
107 static unsigned long softback_in;
108 static unsigned long softback_top, softback_end;
109 static int softback_lines;
110 /* console mappings */
111 static int first_fb_vc;
112 static int last_fb_vc = MAX_NR_CONSOLES - 1;
113 static int fbcon_is_default = 1;
114 static int fbcon_has_exited;
115 static int primary_device = -1;
116 static int fbcon_has_console_bind;
117
118 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
119 static int map_override;
120
121 static inline void fbcon_map_override(void)
122 {
123 map_override = 1;
124 }
125 #else
126 static inline void fbcon_map_override(void)
127 {
128 }
129 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
131 /* font data */
132 static char fontname[40];
133
134 /* current fb_info */
135 static int info_idx = -1;
136
137 /* console rotation */
138 static int initial_rotation;
139 static int fbcon_has_sysfs;
140
141 static const struct consw fb_con;
142
143 #define CM_SOFTBACK (8)
144
145 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
147 static int fbcon_set_origin(struct vc_data *);
148
149 static int fbcon_cursor_noblink;
150
151 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153 /*
154 * Interface used by the world
155 */
156
157 static const char *fbcon_startup(void);
158 static void fbcon_init(struct vc_data *vc, int init);
159 static void fbcon_deinit(struct vc_data *vc);
160 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166 static void fbcon_cursor(struct vc_data *vc, int mode);
167 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171 static int fbcon_switch(struct vc_data *vc);
172 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176 /*
177 * Internal routines
178 */
179 static __inline__ void ywrap_up(struct vc_data *vc, int count);
180 static __inline__ void ywrap_down(struct vc_data *vc, int count);
181 static __inline__ void ypan_up(struct vc_data *vc, int count);
182 static __inline__ void ypan_down(struct vc_data *vc, int count);
183 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
184 int dy, int dx, int height, int width, u_int y_break);
185 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
186 int unit);
187 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
188 int line, int count, int dy);
189 static void fbcon_modechanged(struct fb_info *info);
190 static void fbcon_set_all_vcs(struct fb_info *info);
191 static void fbcon_start(void);
192 static void fbcon_exit(void);
193 static struct device *fbcon_device;
194
195 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
196 static inline void fbcon_set_rotation(struct fb_info *info)
197 {
198 struct fbcon_ops *ops = info->fbcon_par;
199
200 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
201 ops->p->con_rotate < 4)
202 ops->rotate = ops->p->con_rotate;
203 else
204 ops->rotate = 0;
205 }
206
207 static void fbcon_rotate(struct fb_info *info, u32 rotate)
208 {
209 struct fbcon_ops *ops= info->fbcon_par;
210 struct fb_info *fb_info;
211
212 if (!ops || ops->currcon == -1)
213 return;
214
215 fb_info = registered_fb[con2fb_map[ops->currcon]];
216
217 if (info == fb_info) {
218 struct display *p = &fb_display[ops->currcon];
219
220 if (rotate < 4)
221 p->con_rotate = rotate;
222 else
223 p->con_rotate = 0;
224
225 fbcon_modechanged(info);
226 }
227 }
228
229 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
230 {
231 struct fbcon_ops *ops = info->fbcon_par;
232 struct vc_data *vc;
233 struct display *p;
234 int i;
235
236 if (!ops || ops->currcon < 0 || rotate > 3)
237 return;
238
239 for (i = first_fb_vc; i <= last_fb_vc; i++) {
240 vc = vc_cons[i].d;
241 if (!vc || vc->vc_mode != KD_TEXT ||
242 registered_fb[con2fb_map[i]] != info)
243 continue;
244
245 p = &fb_display[vc->vc_num];
246 p->con_rotate = rotate;
247 }
248
249 fbcon_set_all_vcs(info);
250 }
251 #else
252 static inline void fbcon_set_rotation(struct fb_info *info)
253 {
254 struct fbcon_ops *ops = info->fbcon_par;
255
256 ops->rotate = FB_ROTATE_UR;
257 }
258
259 static void fbcon_rotate(struct fb_info *info, u32 rotate)
260 {
261 return;
262 }
263
264 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
265 {
266 return;
267 }
268 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
269
270 static int fbcon_get_rotate(struct fb_info *info)
271 {
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 return (ops) ? ops->rotate : 0;
275 }
276
277 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
278 {
279 struct fbcon_ops *ops = info->fbcon_par;
280
281 return (info->state != FBINFO_STATE_RUNNING ||
282 vc->vc_mode != KD_TEXT || ops->graphics) &&
283 !vt_force_oops_output(vc);
284 }
285
286 static int get_color(struct vc_data *vc, struct fb_info *info,
287 u16 c, int is_fg)
288 {
289 int depth = fb_get_color_depth(&info->var, &info->fix);
290 int color = 0;
291
292 if (console_blanked) {
293 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
294
295 c = vc->vc_video_erase_char & charmask;
296 }
297
298 if (depth != 1)
299 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
300 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
301
302 switch (depth) {
303 case 1:
304 {
305 int col = mono_col(info);
306 /* 0 or 1 */
307 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
308 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
309
310 if (console_blanked)
311 fg = bg;
312
313 color = (is_fg) ? fg : bg;
314 break;
315 }
316 case 2:
317 /*
318 * Scale down 16-colors to 4 colors. Default 4-color palette
319 * is grayscale. However, simply dividing the values by 4
320 * will not work, as colors 1, 2 and 3 will be scaled-down
321 * to zero rendering them invisible. So empirically convert
322 * colors to a sane 4-level grayscale.
323 */
324 switch (color) {
325 case 0:
326 color = 0; /* black */
327 break;
328 case 1 ... 6:
329 color = 2; /* white */
330 break;
331 case 7 ... 8:
332 color = 1; /* gray */
333 break;
334 default:
335 color = 3; /* intense white */
336 break;
337 }
338 break;
339 case 3:
340 /*
341 * Last 8 entries of default 16-color palette is a more intense
342 * version of the first 8 (i.e., same chrominance, different
343 * luminance).
344 */
345 color &= 7;
346 break;
347 }
348
349
350 return color;
351 }
352
353 static void fbcon_update_softback(struct vc_data *vc)
354 {
355 int l = fbcon_softback_size / vc->vc_size_row;
356
357 if (l > 5)
358 softback_end = softback_buf + l * vc->vc_size_row;
359 else
360 /* Smaller scrollback makes no sense, and 0 would screw
361 the operation totally */
362 softback_top = 0;
363 }
364
365 static void fb_flashcursor(struct work_struct *work)
366 {
367 struct fb_info *info = container_of(work, struct fb_info, queue);
368 struct fbcon_ops *ops = info->fbcon_par;
369 struct vc_data *vc = NULL;
370 int c;
371 int mode;
372 int ret;
373
374 /* FIXME: we should sort out the unbind locking instead */
375 /* instead we just fail to flash the cursor if we can't get
376 * the lock instead of blocking fbcon deinit */
377 ret = console_trylock();
378 if (ret == 0)
379 return;
380
381 if (ops && ops->currcon != -1)
382 vc = vc_cons[ops->currcon].d;
383
384 if (!vc || !CON_IS_VISIBLE(vc) ||
385 registered_fb[con2fb_map[vc->vc_num]] != info ||
386 vc->vc_deccm != 1) {
387 console_unlock();
388 return;
389 }
390
391 c = scr_readw((u16 *) vc->vc_pos);
392 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
393 CM_ERASE : CM_DRAW;
394 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
395 get_color(vc, info, c, 0));
396 console_unlock();
397 }
398
399 static void cursor_timer_handler(unsigned long dev_addr)
400 {
401 struct fb_info *info = (struct fb_info *) dev_addr;
402 struct fbcon_ops *ops = info->fbcon_par;
403
404 queue_work(system_power_efficient_wq, &info->queue);
405 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
406 }
407
408 static void fbcon_add_cursor_timer(struct fb_info *info)
409 {
410 struct fbcon_ops *ops = info->fbcon_par;
411
412 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
413 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
414 !fbcon_cursor_noblink) {
415 if (!info->queue.func)
416 INIT_WORK(&info->queue, fb_flashcursor);
417
418 init_timer(&ops->cursor_timer);
419 ops->cursor_timer.function = cursor_timer_handler;
420 ops->cursor_timer.expires = jiffies + ops->cur_blink_jiffies;
421 ops->cursor_timer.data = (unsigned long ) info;
422 add_timer(&ops->cursor_timer);
423 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
424 }
425 }
426
427 static void fbcon_del_cursor_timer(struct fb_info *info)
428 {
429 struct fbcon_ops *ops = info->fbcon_par;
430
431 if (info->queue.func == fb_flashcursor &&
432 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
433 del_timer_sync(&ops->cursor_timer);
434 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
435 }
436 }
437
438 #ifndef MODULE
439 static int __init fb_console_setup(char *this_opt)
440 {
441 char *options;
442 int i, j;
443
444 if (!this_opt || !*this_opt)
445 return 1;
446
447 while ((options = strsep(&this_opt, ",")) != NULL) {
448 if (!strncmp(options, "font:", 5)) {
449 strlcpy(fontname, options + 5, sizeof(fontname));
450 continue;
451 }
452
453 if (!strncmp(options, "scrollback:", 11)) {
454 options += 11;
455 if (*options) {
456 fbcon_softback_size = simple_strtoul(options, &options, 0);
457 if (*options == 'k' || *options == 'K') {
458 fbcon_softback_size *= 1024;
459 }
460 }
461 continue;
462 }
463
464 if (!strncmp(options, "map:", 4)) {
465 options += 4;
466 if (*options) {
467 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
468 if (!options[j])
469 j = 0;
470 con2fb_map_boot[i] =
471 (options[j++]-'0') % FB_MAX;
472 }
473
474 fbcon_map_override();
475 }
476 continue;
477 }
478
479 if (!strncmp(options, "vc:", 3)) {
480 options += 3;
481 if (*options)
482 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 if (first_fb_vc < 0)
484 first_fb_vc = 0;
485 if (*options++ == '-')
486 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
487 fbcon_is_default = 0;
488 continue;
489 }
490
491 if (!strncmp(options, "rotate:", 7)) {
492 options += 7;
493 if (*options)
494 initial_rotation = simple_strtoul(options, &options, 0);
495 if (initial_rotation > 3)
496 initial_rotation = 0;
497 continue;
498 }
499 }
500 return 1;
501 }
502
503 __setup("fbcon=", fb_console_setup);
504 #endif
505
506 static int search_fb_in_map(int idx)
507 {
508 int i, retval = 0;
509
510 for (i = first_fb_vc; i <= last_fb_vc; i++) {
511 if (con2fb_map[i] == idx)
512 retval = 1;
513 }
514 return retval;
515 }
516
517 static int search_for_mapped_con(void)
518 {
519 int i, retval = 0;
520
521 for (i = first_fb_vc; i <= last_fb_vc; i++) {
522 if (con2fb_map[i] != -1)
523 retval = 1;
524 }
525 return retval;
526 }
527
528 static int do_fbcon_takeover(int show_logo)
529 {
530 int err, i;
531
532 if (!num_registered_fb)
533 return -ENODEV;
534
535 if (!show_logo)
536 logo_shown = FBCON_LOGO_DONTSHOW;
537
538 for (i = first_fb_vc; i <= last_fb_vc; i++)
539 con2fb_map[i] = info_idx;
540
541 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
542 fbcon_is_default);
543
544 if (err) {
545 for (i = first_fb_vc; i <= last_fb_vc; i++)
546 con2fb_map[i] = -1;
547 info_idx = -1;
548 } else {
549 fbcon_has_console_bind = 1;
550 }
551
552 return err;
553 }
554
555 #ifdef MODULE
556 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
557 int cols, int rows, int new_cols, int new_rows)
558 {
559 logo_shown = FBCON_LOGO_DONTSHOW;
560 }
561 #else
562 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
563 int cols, int rows, int new_cols, int new_rows)
564 {
565 /* Need to make room for the logo */
566 struct fbcon_ops *ops = info->fbcon_par;
567 int cnt, erase = vc->vc_video_erase_char, step;
568 unsigned short *save = NULL, *r, *q;
569 int logo_height;
570
571 if (info->flags & FBINFO_MODULE) {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 return;
574 }
575
576 /*
577 * remove underline attribute from erase character
578 * if black and white framebuffer.
579 */
580 if (fb_get_color_depth(&info->var, &info->fix) == 1)
581 erase &= ~0x400;
582 logo_height = fb_prepare_logo(info, ops->rotate);
583 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
584 q = (unsigned short *) (vc->vc_origin +
585 vc->vc_size_row * rows);
586 step = logo_lines * cols;
587 for (r = q - logo_lines * cols; r < q; r++)
588 if (scr_readw(r) != vc->vc_video_erase_char)
589 break;
590 if (r != q && new_rows >= rows + logo_lines) {
591 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
592 if (save) {
593 int i = cols < new_cols ? cols : new_cols;
594 scr_memsetw(save, erase, logo_lines * new_cols * 2);
595 r = q - step;
596 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
597 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
598 r = q;
599 }
600 }
601 if (r == q) {
602 /* We can scroll screen down */
603 r = q - step - cols;
604 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
605 scr_memcpyw(r + step, r, vc->vc_size_row);
606 r -= cols;
607 }
608 if (!save) {
609 int lines;
610 if (vc->vc_y + logo_lines >= rows)
611 lines = rows - vc->vc_y - 1;
612 else
613 lines = logo_lines;
614 vc->vc_y += lines;
615 vc->vc_pos += lines * vc->vc_size_row;
616 }
617 }
618 scr_memsetw((unsigned short *) vc->vc_origin,
619 erase,
620 vc->vc_size_row * logo_lines);
621
622 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
623 fbcon_clear_margins(vc, 0);
624 update_screen(vc);
625 }
626
627 if (save) {
628 q = (unsigned short *) (vc->vc_origin +
629 vc->vc_size_row *
630 rows);
631 scr_memcpyw(q, save, logo_lines * new_cols * 2);
632 vc->vc_y += logo_lines;
633 vc->vc_pos += logo_lines * vc->vc_size_row;
634 kfree(save);
635 }
636
637 if (logo_lines > vc->vc_bottom) {
638 logo_shown = FBCON_LOGO_CANSHOW;
639 printk(KERN_INFO
640 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
641 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
642 logo_shown = FBCON_LOGO_DRAW;
643 vc->vc_top = logo_lines;
644 }
645 }
646 #endif /* MODULE */
647
648 #ifdef CONFIG_FB_TILEBLITTING
649 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
650 {
651 struct fbcon_ops *ops = info->fbcon_par;
652
653 ops->p = &fb_display[vc->vc_num];
654
655 if ((info->flags & FBINFO_MISC_TILEBLITTING))
656 fbcon_set_tileops(vc, info);
657 else {
658 fbcon_set_rotation(info);
659 fbcon_set_bitops(ops);
660 }
661 }
662
663 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
664 {
665 int err = 0;
666
667 if (info->flags & FBINFO_MISC_TILEBLITTING &&
668 info->tileops->fb_get_tilemax(info) < charcount)
669 err = 1;
670
671 return err;
672 }
673 #else
674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
675 {
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 info->flags &= ~FBINFO_MISC_TILEBLITTING;
679 ops->p = &fb_display[vc->vc_num];
680 fbcon_set_rotation(info);
681 fbcon_set_bitops(ops);
682 }
683
684 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
685 {
686 return 0;
687 }
688
689 #endif /* CONFIG_MISC_TILEBLITTING */
690
691
692 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
693 int unit, int oldidx)
694 {
695 struct fbcon_ops *ops = NULL;
696 int err = 0;
697
698 if (!try_module_get(info->fbops->owner))
699 err = -ENODEV;
700
701 if (!err && info->fbops->fb_open &&
702 info->fbops->fb_open(info, 0))
703 err = -ENODEV;
704
705 if (!err) {
706 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
707 if (!ops)
708 err = -ENOMEM;
709 }
710
711 if (!err) {
712 info->fbcon_par = ops;
713
714 if (vc)
715 set_blitting_type(vc, info);
716 }
717
718 if (err) {
719 con2fb_map[unit] = oldidx;
720 module_put(info->fbops->owner);
721 }
722
723 return err;
724 }
725
726 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
727 struct fb_info *newinfo, int unit,
728 int oldidx, int found)
729 {
730 struct fbcon_ops *ops = oldinfo->fbcon_par;
731 int err = 0, ret;
732
733 if (oldinfo->fbops->fb_release &&
734 oldinfo->fbops->fb_release(oldinfo, 0)) {
735 con2fb_map[unit] = oldidx;
736 if (!found && newinfo->fbops->fb_release)
737 newinfo->fbops->fb_release(newinfo, 0);
738 if (!found)
739 module_put(newinfo->fbops->owner);
740 err = -ENODEV;
741 }
742
743 if (!err) {
744 fbcon_del_cursor_timer(oldinfo);
745 kfree(ops->cursor_state.mask);
746 kfree(ops->cursor_data);
747 kfree(ops->cursor_src);
748 kfree(ops->fontbuffer);
749 kfree(oldinfo->fbcon_par);
750 oldinfo->fbcon_par = NULL;
751 module_put(oldinfo->fbops->owner);
752 /*
753 If oldinfo and newinfo are driving the same hardware,
754 the fb_release() method of oldinfo may attempt to
755 restore the hardware state. This will leave the
756 newinfo in an undefined state. Thus, a call to
757 fb_set_par() may be needed for the newinfo.
758 */
759 if (newinfo && newinfo->fbops->fb_set_par) {
760 ret = newinfo->fbops->fb_set_par(newinfo);
761
762 if (ret)
763 printk(KERN_ERR "con2fb_release_oldinfo: "
764 "detected unhandled fb_set_par error, "
765 "error code %d\n", ret);
766 }
767 }
768
769 return err;
770 }
771
772 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
773 int unit, int show_logo)
774 {
775 struct fbcon_ops *ops = info->fbcon_par;
776 int ret;
777
778 ops->currcon = fg_console;
779
780 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
781 ret = info->fbops->fb_set_par(info);
782
783 if (ret)
784 printk(KERN_ERR "con2fb_init_display: detected "
785 "unhandled fb_set_par error, "
786 "error code %d\n", ret);
787 }
788
789 ops->flags |= FBCON_FLAGS_INIT;
790 ops->graphics = 0;
791 fbcon_set_disp(info, &info->var, unit);
792
793 if (show_logo) {
794 struct vc_data *fg_vc = vc_cons[fg_console].d;
795 struct fb_info *fg_info =
796 registered_fb[con2fb_map[fg_console]];
797
798 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
799 fg_vc->vc_rows, fg_vc->vc_cols,
800 fg_vc->vc_rows);
801 }
802
803 update_screen(vc_cons[fg_console].d);
804 }
805
806 /**
807 * set_con2fb_map - map console to frame buffer device
808 * @unit: virtual console number to map
809 * @newidx: frame buffer index to map virtual console to
810 * @user: user request
811 *
812 * Maps a virtual console @unit to a frame buffer device
813 * @newidx.
814 *
815 * This should be called with the console lock held.
816 */
817 static int set_con2fb_map(int unit, int newidx, int user)
818 {
819 struct vc_data *vc = vc_cons[unit].d;
820 int oldidx = con2fb_map[unit];
821 struct fb_info *info = registered_fb[newidx];
822 struct fb_info *oldinfo = NULL;
823 int found, err = 0;
824
825 if (oldidx == newidx)
826 return 0;
827
828 if (!info)
829 return -EINVAL;
830
831 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
832 info_idx = newidx;
833 return do_fbcon_takeover(0);
834 }
835
836 if (oldidx != -1)
837 oldinfo = registered_fb[oldidx];
838
839 found = search_fb_in_map(newidx);
840
841 con2fb_map[unit] = newidx;
842 if (!err && !found)
843 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
844
845
846 /*
847 * If old fb is not mapped to any of the consoles,
848 * fbcon should release it.
849 */
850 if (!err && oldinfo && !search_fb_in_map(oldidx))
851 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
852 found);
853
854 if (!err) {
855 int show_logo = (fg_console == 0 && !user &&
856 logo_shown != FBCON_LOGO_DONTSHOW);
857
858 if (!found)
859 fbcon_add_cursor_timer(info);
860 con2fb_map_boot[unit] = newidx;
861 con2fb_init_display(vc, info, unit, show_logo);
862 }
863
864 if (!search_fb_in_map(info_idx))
865 info_idx = newidx;
866
867 return err;
868 }
869
870 /*
871 * Low Level Operations
872 */
873 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
874 static int var_to_display(struct display *disp,
875 struct fb_var_screeninfo *var,
876 struct fb_info *info)
877 {
878 disp->xres_virtual = var->xres_virtual;
879 disp->yres_virtual = var->yres_virtual;
880 disp->bits_per_pixel = var->bits_per_pixel;
881 disp->grayscale = var->grayscale;
882 disp->nonstd = var->nonstd;
883 disp->accel_flags = var->accel_flags;
884 disp->height = var->height;
885 disp->width = var->width;
886 disp->red = var->red;
887 disp->green = var->green;
888 disp->blue = var->blue;
889 disp->transp = var->transp;
890 disp->rotate = var->rotate;
891 disp->mode = fb_match_mode(var, &info->modelist);
892 if (disp->mode == NULL)
893 /* This should not happen */
894 return -EINVAL;
895 return 0;
896 }
897
898 static void display_to_var(struct fb_var_screeninfo *var,
899 struct display *disp)
900 {
901 fb_videomode_to_var(var, disp->mode);
902 var->xres_virtual = disp->xres_virtual;
903 var->yres_virtual = disp->yres_virtual;
904 var->bits_per_pixel = disp->bits_per_pixel;
905 var->grayscale = disp->grayscale;
906 var->nonstd = disp->nonstd;
907 var->accel_flags = disp->accel_flags;
908 var->height = disp->height;
909 var->width = disp->width;
910 var->red = disp->red;
911 var->green = disp->green;
912 var->blue = disp->blue;
913 var->transp = disp->transp;
914 var->rotate = disp->rotate;
915 }
916
917 static const char *fbcon_startup(void)
918 {
919 const char *display_desc = "frame buffer device";
920 struct display *p = &fb_display[fg_console];
921 struct vc_data *vc = vc_cons[fg_console].d;
922 const struct font_desc *font = NULL;
923 struct module *owner;
924 struct fb_info *info = NULL;
925 struct fbcon_ops *ops;
926 int rows, cols;
927
928 /*
929 * If num_registered_fb is zero, this is a call for the dummy part.
930 * The frame buffer devices weren't initialized yet.
931 */
932 if (!num_registered_fb || info_idx == -1)
933 return display_desc;
934 /*
935 * Instead of blindly using registered_fb[0], we use info_idx, set by
936 * fb_console_init();
937 */
938 info = registered_fb[info_idx];
939 if (!info)
940 return NULL;
941
942 owner = info->fbops->owner;
943 if (!try_module_get(owner))
944 return NULL;
945 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
946 module_put(owner);
947 return NULL;
948 }
949
950 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
951 if (!ops) {
952 module_put(owner);
953 return NULL;
954 }
955
956 ops->currcon = -1;
957 ops->graphics = 1;
958 ops->cur_rotate = -1;
959 info->fbcon_par = ops;
960 p->con_rotate = initial_rotation;
961 set_blitting_type(vc, info);
962
963 if (info->fix.type != FB_TYPE_TEXT) {
964 if (fbcon_softback_size) {
965 if (!softback_buf) {
966 softback_buf =
967 (unsigned long)
968 kmalloc(fbcon_softback_size,
969 GFP_KERNEL);
970 if (!softback_buf) {
971 fbcon_softback_size = 0;
972 softback_top = 0;
973 }
974 }
975 } else {
976 if (softback_buf) {
977 kfree((void *) softback_buf);
978 softback_buf = 0;
979 softback_top = 0;
980 }
981 }
982 if (softback_buf)
983 softback_in = softback_top = softback_curr =
984 softback_buf;
985 softback_lines = 0;
986 }
987
988 /* Setup default font */
989 if (!p->fontdata && !vc->vc_font.data) {
990 if (!fontname[0] || !(font = find_font(fontname)))
991 font = get_default_font(info->var.xres,
992 info->var.yres,
993 info->pixmap.blit_x,
994 info->pixmap.blit_y);
995 vc->vc_font.width = font->width;
996 vc->vc_font.height = font->height;
997 vc->vc_font.data = (void *)(p->fontdata = font->data);
998 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
999 } else {
1000 p->fontdata = vc->vc_font.data;
1001 }
1002
1003 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1004 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1005 cols /= vc->vc_font.width;
1006 rows /= vc->vc_font.height;
1007 vc_resize(vc, cols, rows);
1008
1009 DPRINTK("mode: %s\n", info->fix.id);
1010 DPRINTK("visual: %d\n", info->fix.visual);
1011 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1012 info->var.yres,
1013 info->var.bits_per_pixel);
1014
1015 fbcon_add_cursor_timer(info);
1016 fbcon_has_exited = 0;
1017 return display_desc;
1018 }
1019
1020 static void fbcon_init(struct vc_data *vc, int init)
1021 {
1022 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1023 struct fbcon_ops *ops;
1024 struct vc_data **default_mode = vc->vc_display_fg;
1025 struct vc_data *svc = *default_mode;
1026 struct display *t, *p = &fb_display[vc->vc_num];
1027 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1028 int cap, ret;
1029
1030 if (info_idx == -1 || info == NULL)
1031 return;
1032
1033 cap = info->flags;
1034
1035 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1036 (info->fix.type == FB_TYPE_TEXT))
1037 logo = 0;
1038
1039 if (var_to_display(p, &info->var, info))
1040 return;
1041
1042 if (!info->fbcon_par)
1043 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1044
1045 /* If we are not the first console on this
1046 fb, copy the font from that console */
1047 t = &fb_display[fg_console];
1048 if (!p->fontdata) {
1049 if (t->fontdata) {
1050 struct vc_data *fvc = vc_cons[fg_console].d;
1051
1052 vc->vc_font.data = (void *)(p->fontdata =
1053 fvc->vc_font.data);
1054 vc->vc_font.width = fvc->vc_font.width;
1055 vc->vc_font.height = fvc->vc_font.height;
1056 p->userfont = t->userfont;
1057
1058 if (p->userfont)
1059 REFCOUNT(p->fontdata)++;
1060 } else {
1061 const struct font_desc *font = NULL;
1062
1063 if (!fontname[0] || !(font = find_font(fontname)))
1064 font = get_default_font(info->var.xres,
1065 info->var.yres,
1066 info->pixmap.blit_x,
1067 info->pixmap.blit_y);
1068 vc->vc_font.width = font->width;
1069 vc->vc_font.height = font->height;
1070 vc->vc_font.data = (void *)(p->fontdata = font->data);
1071 vc->vc_font.charcount = 256; /* FIXME Need to
1072 support more fonts */
1073 }
1074 }
1075
1076 if (p->userfont)
1077 charcnt = FNTCHARCNT(p->fontdata);
1078
1079 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1080 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1081 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1082 if (charcnt == 256) {
1083 vc->vc_hi_font_mask = 0;
1084 } else {
1085 vc->vc_hi_font_mask = 0x100;
1086 if (vc->vc_can_do_color)
1087 vc->vc_complement_mask <<= 1;
1088 }
1089
1090 if (!*svc->vc_uni_pagedir_loc)
1091 con_set_default_unimap(svc);
1092 if (!*vc->vc_uni_pagedir_loc)
1093 con_copy_unimap(vc, svc);
1094
1095 ops = info->fbcon_par;
1096 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1097 p->con_rotate = initial_rotation;
1098 set_blitting_type(vc, info);
1099
1100 cols = vc->vc_cols;
1101 rows = vc->vc_rows;
1102 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1103 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1104 new_cols /= vc->vc_font.width;
1105 new_rows /= vc->vc_font.height;
1106
1107 /*
1108 * We must always set the mode. The mode of the previous console
1109 * driver could be in the same resolution but we are using different
1110 * hardware so we have to initialize the hardware.
1111 *
1112 * We need to do it in fbcon_init() to prevent screen corruption.
1113 */
1114 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1115 if (info->fbops->fb_set_par &&
1116 !(ops->flags & FBCON_FLAGS_INIT)) {
1117 ret = info->fbops->fb_set_par(info);
1118
1119 if (ret)
1120 printk(KERN_ERR "fbcon_init: detected "
1121 "unhandled fb_set_par error, "
1122 "error code %d\n", ret);
1123 }
1124
1125 ops->flags |= FBCON_FLAGS_INIT;
1126 }
1127
1128 ops->graphics = 0;
1129
1130 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1131 !(cap & FBINFO_HWACCEL_DISABLED))
1132 p->scrollmode = SCROLL_MOVE;
1133 else /* default to something safe */
1134 p->scrollmode = SCROLL_REDRAW;
1135
1136 /*
1137 * ++guenther: console.c:vc_allocate() relies on initializing
1138 * vc_{cols,rows}, but we must not set those if we are only
1139 * resizing the console.
1140 */
1141 if (init) {
1142 vc->vc_cols = new_cols;
1143 vc->vc_rows = new_rows;
1144 } else
1145 vc_resize(vc, new_cols, new_rows);
1146
1147 if (logo)
1148 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1149
1150 if (vc == svc && softback_buf)
1151 fbcon_update_softback(vc);
1152
1153 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1154 ops->rotate = FB_ROTATE_UR;
1155 set_blitting_type(vc, info);
1156 }
1157
1158 ops->p = &fb_display[fg_console];
1159 }
1160
1161 static void fbcon_free_font(struct display *p, bool freefont)
1162 {
1163 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1164 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1165 p->fontdata = NULL;
1166 p->userfont = 0;
1167 }
1168
1169 static void fbcon_deinit(struct vc_data *vc)
1170 {
1171 struct display *p = &fb_display[vc->vc_num];
1172 struct fb_info *info;
1173 struct fbcon_ops *ops;
1174 int idx;
1175 bool free_font = true;
1176
1177 idx = con2fb_map[vc->vc_num];
1178
1179 if (idx == -1)
1180 goto finished;
1181
1182 info = registered_fb[idx];
1183
1184 if (!info)
1185 goto finished;
1186
1187 if (info->flags & FBINFO_MISC_FIRMWARE)
1188 free_font = false;
1189 ops = info->fbcon_par;
1190
1191 if (!ops)
1192 goto finished;
1193
1194 if (CON_IS_VISIBLE(vc))
1195 fbcon_del_cursor_timer(info);
1196
1197 ops->flags &= ~FBCON_FLAGS_INIT;
1198 finished:
1199
1200 fbcon_free_font(p, free_font);
1201 if (free_font)
1202 vc->vc_font.data = NULL;
1203
1204 if (!con_is_bound(&fb_con))
1205 fbcon_exit();
1206
1207 return;
1208 }
1209
1210 /* ====================================================================== */
1211
1212 /* fbcon_XXX routines - interface used by the world
1213 *
1214 * This system is now divided into two levels because of complications
1215 * caused by hardware scrolling. Top level functions:
1216 *
1217 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1218 *
1219 * handles y values in range [0, scr_height-1] that correspond to real
1220 * screen positions. y_wrap shift means that first line of bitmap may be
1221 * anywhere on this display. These functions convert lineoffsets to
1222 * bitmap offsets and deal with the wrap-around case by splitting blits.
1223 *
1224 * fbcon_bmove_physical_8() -- These functions fast implementations
1225 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1226 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1227 *
1228 * WARNING:
1229 *
1230 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1231 * Implies should only really hardware scroll in rows. Only reason for
1232 * restriction is simplicity & efficiency at the moment.
1233 */
1234
1235 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1236 int width)
1237 {
1238 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1239 struct fbcon_ops *ops = info->fbcon_par;
1240
1241 struct display *p = &fb_display[vc->vc_num];
1242 u_int y_break;
1243
1244 if (fbcon_is_inactive(vc, info))
1245 return;
1246
1247 if (!height || !width)
1248 return;
1249
1250 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1251 vc->vc_top = 0;
1252 /*
1253 * If the font dimensions are not an integral of the display
1254 * dimensions then the ops->clear below won't end up clearing
1255 * the margins. Call clear_margins here in case the logo
1256 * bitmap stretched into the margin area.
1257 */
1258 fbcon_clear_margins(vc, 0);
1259 }
1260
1261 /* Split blits that cross physical y_wrap boundary */
1262
1263 y_break = p->vrows - p->yscroll;
1264 if (sy < y_break && sy + height - 1 >= y_break) {
1265 u_int b = y_break - sy;
1266 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1267 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1268 width);
1269 } else
1270 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1271 }
1272
1273 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1274 int count, int ypos, int xpos)
1275 {
1276 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1277 struct display *p = &fb_display[vc->vc_num];
1278 struct fbcon_ops *ops = info->fbcon_par;
1279
1280 if (!fbcon_is_inactive(vc, info))
1281 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1282 get_color(vc, info, scr_readw(s), 1),
1283 get_color(vc, info, scr_readw(s), 0));
1284 }
1285
1286 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1287 {
1288 unsigned short chr;
1289
1290 scr_writew(c, &chr);
1291 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1292 }
1293
1294 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1295 {
1296 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1297 struct fbcon_ops *ops = info->fbcon_par;
1298
1299 if (!fbcon_is_inactive(vc, info))
1300 ops->clear_margins(vc, info, bottom_only);
1301 }
1302
1303 static void fbcon_cursor(struct vc_data *vc, int mode)
1304 {
1305 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1306 struct fbcon_ops *ops = info->fbcon_par;
1307 int y;
1308 int c = scr_readw((u16 *) vc->vc_pos);
1309
1310 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1311
1312 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1313 return;
1314
1315 if (vc->vc_cursor_type & 0x10)
1316 fbcon_del_cursor_timer(info);
1317 else
1318 fbcon_add_cursor_timer(info);
1319
1320 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1321 if (mode & CM_SOFTBACK) {
1322 mode &= ~CM_SOFTBACK;
1323 y = softback_lines;
1324 } else {
1325 if (softback_lines)
1326 fbcon_set_origin(vc);
1327 y = 0;
1328 }
1329
1330 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1331 get_color(vc, info, c, 0));
1332 }
1333
1334 static int scrollback_phys_max = 0;
1335 static int scrollback_max = 0;
1336 static int scrollback_current = 0;
1337
1338 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1339 int unit)
1340 {
1341 struct display *p, *t;
1342 struct vc_data **default_mode, *vc;
1343 struct vc_data *svc;
1344 struct fbcon_ops *ops = info->fbcon_par;
1345 int rows, cols, charcnt = 256;
1346
1347 p = &fb_display[unit];
1348
1349 if (var_to_display(p, var, info))
1350 return;
1351
1352 vc = vc_cons[unit].d;
1353
1354 if (!vc)
1355 return;
1356
1357 default_mode = vc->vc_display_fg;
1358 svc = *default_mode;
1359 t = &fb_display[svc->vc_num];
1360
1361 if (!vc->vc_font.data) {
1362 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1363 vc->vc_font.width = (*default_mode)->vc_font.width;
1364 vc->vc_font.height = (*default_mode)->vc_font.height;
1365 p->userfont = t->userfont;
1366 if (p->userfont)
1367 REFCOUNT(p->fontdata)++;
1368 }
1369 if (p->userfont)
1370 charcnt = FNTCHARCNT(p->fontdata);
1371
1372 var->activate = FB_ACTIVATE_NOW;
1373 info->var.activate = var->activate;
1374 var->yoffset = info->var.yoffset;
1375 var->xoffset = info->var.xoffset;
1376 fb_set_var(info, var);
1377 ops->var = info->var;
1378 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1379 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1380 if (charcnt == 256) {
1381 vc->vc_hi_font_mask = 0;
1382 } else {
1383 vc->vc_hi_font_mask = 0x100;
1384 if (vc->vc_can_do_color)
1385 vc->vc_complement_mask <<= 1;
1386 }
1387
1388 if (!*svc->vc_uni_pagedir_loc)
1389 con_set_default_unimap(svc);
1390 if (!*vc->vc_uni_pagedir_loc)
1391 con_copy_unimap(vc, svc);
1392
1393 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1394 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1395 cols /= vc->vc_font.width;
1396 rows /= vc->vc_font.height;
1397 vc_resize(vc, cols, rows);
1398
1399 if (CON_IS_VISIBLE(vc)) {
1400 update_screen(vc);
1401 if (softback_buf)
1402 fbcon_update_softback(vc);
1403 }
1404 }
1405
1406 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1407 {
1408 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1409 struct fbcon_ops *ops = info->fbcon_par;
1410 struct display *p = &fb_display[vc->vc_num];
1411
1412 p->yscroll += count;
1413 if (p->yscroll >= p->vrows) /* Deal with wrap */
1414 p->yscroll -= p->vrows;
1415 ops->var.xoffset = 0;
1416 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1417 ops->var.vmode |= FB_VMODE_YWRAP;
1418 ops->update_start(info);
1419 scrollback_max += count;
1420 if (scrollback_max > scrollback_phys_max)
1421 scrollback_max = scrollback_phys_max;
1422 scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1426 {
1427 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428 struct fbcon_ops *ops = info->fbcon_par;
1429 struct display *p = &fb_display[vc->vc_num];
1430
1431 p->yscroll -= count;
1432 if (p->yscroll < 0) /* Deal with wrap */
1433 p->yscroll += p->vrows;
1434 ops->var.xoffset = 0;
1435 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1436 ops->var.vmode |= FB_VMODE_YWRAP;
1437 ops->update_start(info);
1438 scrollback_max -= count;
1439 if (scrollback_max < 0)
1440 scrollback_max = 0;
1441 scrollback_current = 0;
1442 }
1443
1444 static __inline__ void ypan_up(struct vc_data *vc, int count)
1445 {
1446 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1447 struct display *p = &fb_display[vc->vc_num];
1448 struct fbcon_ops *ops = info->fbcon_par;
1449
1450 p->yscroll += count;
1451 if (p->yscroll > p->vrows - vc->vc_rows) {
1452 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1453 0, 0, 0, vc->vc_rows, vc->vc_cols);
1454 p->yscroll -= p->vrows - vc->vc_rows;
1455 }
1456
1457 ops->var.xoffset = 0;
1458 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1459 ops->var.vmode &= ~FB_VMODE_YWRAP;
1460 ops->update_start(info);
1461 fbcon_clear_margins(vc, 1);
1462 scrollback_max += count;
1463 if (scrollback_max > scrollback_phys_max)
1464 scrollback_max = scrollback_phys_max;
1465 scrollback_current = 0;
1466 }
1467
1468 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1469 {
1470 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1471 struct fbcon_ops *ops = info->fbcon_par;
1472 struct display *p = &fb_display[vc->vc_num];
1473
1474 p->yscroll += count;
1475
1476 if (p->yscroll > p->vrows - vc->vc_rows) {
1477 p->yscroll -= p->vrows - vc->vc_rows;
1478 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1479 }
1480
1481 ops->var.xoffset = 0;
1482 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1483 ops->var.vmode &= ~FB_VMODE_YWRAP;
1484 ops->update_start(info);
1485 fbcon_clear_margins(vc, 1);
1486 scrollback_max += count;
1487 if (scrollback_max > scrollback_phys_max)
1488 scrollback_max = scrollback_phys_max;
1489 scrollback_current = 0;
1490 }
1491
1492 static __inline__ void ypan_down(struct vc_data *vc, int count)
1493 {
1494 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1495 struct display *p = &fb_display[vc->vc_num];
1496 struct fbcon_ops *ops = info->fbcon_par;
1497
1498 p->yscroll -= count;
1499 if (p->yscroll < 0) {
1500 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1501 0, vc->vc_rows, vc->vc_cols);
1502 p->yscroll += p->vrows - vc->vc_rows;
1503 }
1504
1505 ops->var.xoffset = 0;
1506 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1507 ops->var.vmode &= ~FB_VMODE_YWRAP;
1508 ops->update_start(info);
1509 fbcon_clear_margins(vc, 1);
1510 scrollback_max -= count;
1511 if (scrollback_max < 0)
1512 scrollback_max = 0;
1513 scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1517 {
1518 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519 struct fbcon_ops *ops = info->fbcon_par;
1520 struct display *p = &fb_display[vc->vc_num];
1521
1522 p->yscroll -= count;
1523
1524 if (p->yscroll < 0) {
1525 p->yscroll += p->vrows - vc->vc_rows;
1526 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1527 }
1528
1529 ops->var.xoffset = 0;
1530 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531 ops->var.vmode &= ~FB_VMODE_YWRAP;
1532 ops->update_start(info);
1533 fbcon_clear_margins(vc, 1);
1534 scrollback_max -= count;
1535 if (scrollback_max < 0)
1536 scrollback_max = 0;
1537 scrollback_current = 0;
1538 }
1539
1540 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1541 long delta)
1542 {
1543 int count = vc->vc_rows;
1544 unsigned short *d, *s;
1545 unsigned long n;
1546 int line = 0;
1547
1548 d = (u16 *) softback_curr;
1549 if (d == (u16 *) softback_in)
1550 d = (u16 *) vc->vc_origin;
1551 n = softback_curr + delta * vc->vc_size_row;
1552 softback_lines -= delta;
1553 if (delta < 0) {
1554 if (softback_curr < softback_top && n < softback_buf) {
1555 n += softback_end - softback_buf;
1556 if (n < softback_top) {
1557 softback_lines -=
1558 (softback_top - n) / vc->vc_size_row;
1559 n = softback_top;
1560 }
1561 } else if (softback_curr >= softback_top
1562 && n < softback_top) {
1563 softback_lines -=
1564 (softback_top - n) / vc->vc_size_row;
1565 n = softback_top;
1566 }
1567 } else {
1568 if (softback_curr > softback_in && n >= softback_end) {
1569 n += softback_buf - softback_end;
1570 if (n > softback_in) {
1571 n = softback_in;
1572 softback_lines = 0;
1573 }
1574 } else if (softback_curr <= softback_in && n > softback_in) {
1575 n = softback_in;
1576 softback_lines = 0;
1577 }
1578 }
1579 if (n == softback_curr)
1580 return;
1581 softback_curr = n;
1582 s = (u16 *) softback_curr;
1583 if (s == (u16 *) softback_in)
1584 s = (u16 *) vc->vc_origin;
1585 while (count--) {
1586 unsigned short *start;
1587 unsigned short *le;
1588 unsigned short c;
1589 int x = 0;
1590 unsigned short attr = 1;
1591
1592 start = s;
1593 le = advance_row(s, 1);
1594 do {
1595 c = scr_readw(s);
1596 if (attr != (c & 0xff00)) {
1597 attr = c & 0xff00;
1598 if (s > start) {
1599 fbcon_putcs(vc, start, s - start,
1600 line, x);
1601 x += s - start;
1602 start = s;
1603 }
1604 }
1605 if (c == scr_readw(d)) {
1606 if (s > start) {
1607 fbcon_putcs(vc, start, s - start,
1608 line, x);
1609 x += s - start + 1;
1610 start = s + 1;
1611 } else {
1612 x++;
1613 start++;
1614 }
1615 }
1616 s++;
1617 d++;
1618 } while (s < le);
1619 if (s > start)
1620 fbcon_putcs(vc, start, s - start, line, x);
1621 line++;
1622 if (d == (u16 *) softback_end)
1623 d = (u16 *) softback_buf;
1624 if (d == (u16 *) softback_in)
1625 d = (u16 *) vc->vc_origin;
1626 if (s == (u16 *) softback_end)
1627 s = (u16 *) softback_buf;
1628 if (s == (u16 *) softback_in)
1629 s = (u16 *) vc->vc_origin;
1630 }
1631 }
1632
1633 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1634 int line, int count, int dy)
1635 {
1636 unsigned short *s = (unsigned short *)
1637 (vc->vc_origin + vc->vc_size_row * line);
1638
1639 while (count--) {
1640 unsigned short *start = s;
1641 unsigned short *le = advance_row(s, 1);
1642 unsigned short c;
1643 int x = 0;
1644 unsigned short attr = 1;
1645
1646 do {
1647 c = scr_readw(s);
1648 if (attr != (c & 0xff00)) {
1649 attr = c & 0xff00;
1650 if (s > start) {
1651 fbcon_putcs(vc, start, s - start,
1652 dy, x);
1653 x += s - start;
1654 start = s;
1655 }
1656 }
1657 console_conditional_schedule();
1658 s++;
1659 } while (s < le);
1660 if (s > start)
1661 fbcon_putcs(vc, start, s - start, dy, x);
1662 console_conditional_schedule();
1663 dy++;
1664 }
1665 }
1666
1667 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1668 struct display *p, int line, int count, int ycount)
1669 {
1670 int offset = ycount * vc->vc_cols;
1671 unsigned short *d = (unsigned short *)
1672 (vc->vc_origin + vc->vc_size_row * line);
1673 unsigned short *s = d + offset;
1674 struct fbcon_ops *ops = info->fbcon_par;
1675
1676 while (count--) {
1677 unsigned short *start = s;
1678 unsigned short *le = advance_row(s, 1);
1679 unsigned short c;
1680 int x = 0;
1681
1682 do {
1683 c = scr_readw(s);
1684
1685 if (c == scr_readw(d)) {
1686 if (s > start) {
1687 ops->bmove(vc, info, line + ycount, x,
1688 line, x, 1, s-start);
1689 x += s - start + 1;
1690 start = s + 1;
1691 } else {
1692 x++;
1693 start++;
1694 }
1695 }
1696
1697 scr_writew(c, d);
1698 console_conditional_schedule();
1699 s++;
1700 d++;
1701 } while (s < le);
1702 if (s > start)
1703 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1704 s-start);
1705 console_conditional_schedule();
1706 if (ycount > 0)
1707 line++;
1708 else {
1709 line--;
1710 /* NOTE: We subtract two lines from these pointers */
1711 s -= vc->vc_size_row;
1712 d -= vc->vc_size_row;
1713 }
1714 }
1715 }
1716
1717 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1718 int line, int count, int offset)
1719 {
1720 unsigned short *d = (unsigned short *)
1721 (vc->vc_origin + vc->vc_size_row * line);
1722 unsigned short *s = d + offset;
1723
1724 while (count--) {
1725 unsigned short *start = s;
1726 unsigned short *le = advance_row(s, 1);
1727 unsigned short c;
1728 int x = 0;
1729 unsigned short attr = 1;
1730
1731 do {
1732 c = scr_readw(s);
1733 if (attr != (c & 0xff00)) {
1734 attr = c & 0xff00;
1735 if (s > start) {
1736 fbcon_putcs(vc, start, s - start,
1737 line, x);
1738 x += s - start;
1739 start = s;
1740 }
1741 }
1742 if (c == scr_readw(d)) {
1743 if (s > start) {
1744 fbcon_putcs(vc, start, s - start,
1745 line, x);
1746 x += s - start + 1;
1747 start = s + 1;
1748 } else {
1749 x++;
1750 start++;
1751 }
1752 }
1753 scr_writew(c, d);
1754 console_conditional_schedule();
1755 s++;
1756 d++;
1757 } while (s < le);
1758 if (s > start)
1759 fbcon_putcs(vc, start, s - start, line, x);
1760 console_conditional_schedule();
1761 if (offset > 0)
1762 line++;
1763 else {
1764 line--;
1765 /* NOTE: We subtract two lines from these pointers */
1766 s -= vc->vc_size_row;
1767 d -= vc->vc_size_row;
1768 }
1769 }
1770 }
1771
1772 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1773 int count)
1774 {
1775 unsigned short *p;
1776
1777 if (vc->vc_num != fg_console)
1778 return;
1779 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1780
1781 while (count) {
1782 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1783 count--;
1784 p = advance_row(p, 1);
1785 softback_in += vc->vc_size_row;
1786 if (softback_in == softback_end)
1787 softback_in = softback_buf;
1788 if (softback_in == softback_top) {
1789 softback_top += vc->vc_size_row;
1790 if (softback_top == softback_end)
1791 softback_top = softback_buf;
1792 }
1793 }
1794 softback_curr = softback_in;
1795 }
1796
1797 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1798 int count)
1799 {
1800 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1801 struct display *p = &fb_display[vc->vc_num];
1802 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1803
1804 if (fbcon_is_inactive(vc, info))
1805 return -EINVAL;
1806
1807 fbcon_cursor(vc, CM_ERASE);
1808
1809 /*
1810 * ++Geert: Only use ywrap/ypan if the console is in text mode
1811 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1812 * whole screen (prevents flicker).
1813 */
1814
1815 switch (dir) {
1816 case SM_UP:
1817 if (count > vc->vc_rows) /* Maximum realistic size */
1818 count = vc->vc_rows;
1819 if (softback_top)
1820 fbcon_softback_note(vc, t, count);
1821 if (logo_shown >= 0)
1822 goto redraw_up;
1823 switch (p->scrollmode) {
1824 case SCROLL_MOVE:
1825 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1826 count);
1827 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1828 scr_memsetw((unsigned short *) (vc->vc_origin +
1829 vc->vc_size_row *
1830 (b - count)),
1831 vc->vc_video_erase_char,
1832 vc->vc_size_row * count);
1833 return 1;
1834 break;
1835
1836 case SCROLL_WRAP_MOVE:
1837 if (b - t - count > 3 * vc->vc_rows >> 2) {
1838 if (t > 0)
1839 fbcon_bmove(vc, 0, 0, count, 0, t,
1840 vc->vc_cols);
1841 ywrap_up(vc, count);
1842 if (vc->vc_rows - b > 0)
1843 fbcon_bmove(vc, b - count, 0, b, 0,
1844 vc->vc_rows - b,
1845 vc->vc_cols);
1846 } else if (info->flags & FBINFO_READS_FAST)
1847 fbcon_bmove(vc, t + count, 0, t, 0,
1848 b - t - count, vc->vc_cols);
1849 else
1850 goto redraw_up;
1851 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1852 break;
1853
1854 case SCROLL_PAN_REDRAW:
1855 if ((p->yscroll + count <=
1856 2 * (p->vrows - vc->vc_rows))
1857 && ((!scroll_partial && (b - t == vc->vc_rows))
1858 || (scroll_partial
1859 && (b - t - count >
1860 3 * vc->vc_rows >> 2)))) {
1861 if (t > 0)
1862 fbcon_redraw_move(vc, p, 0, t, count);
1863 ypan_up_redraw(vc, t, count);
1864 if (vc->vc_rows - b > 0)
1865 fbcon_redraw_move(vc, p, b,
1866 vc->vc_rows - b, b);
1867 } else
1868 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1869 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1870 break;
1871
1872 case SCROLL_PAN_MOVE:
1873 if ((p->yscroll + count <=
1874 2 * (p->vrows - vc->vc_rows))
1875 && ((!scroll_partial && (b - t == vc->vc_rows))
1876 || (scroll_partial
1877 && (b - t - count >
1878 3 * vc->vc_rows >> 2)))) {
1879 if (t > 0)
1880 fbcon_bmove(vc, 0, 0, count, 0, t,
1881 vc->vc_cols);
1882 ypan_up(vc, count);
1883 if (vc->vc_rows - b > 0)
1884 fbcon_bmove(vc, b - count, 0, b, 0,
1885 vc->vc_rows - b,
1886 vc->vc_cols);
1887 } else if (info->flags & FBINFO_READS_FAST)
1888 fbcon_bmove(vc, t + count, 0, t, 0,
1889 b - t - count, vc->vc_cols);
1890 else
1891 goto redraw_up;
1892 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1893 break;
1894
1895 case SCROLL_REDRAW:
1896 redraw_up:
1897 fbcon_redraw(vc, p, t, b - t - count,
1898 count * vc->vc_cols);
1899 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1900 scr_memsetw((unsigned short *) (vc->vc_origin +
1901 vc->vc_size_row *
1902 (b - count)),
1903 vc->vc_video_erase_char,
1904 vc->vc_size_row * count);
1905 return 1;
1906 }
1907 break;
1908
1909 case SM_DOWN:
1910 if (count > vc->vc_rows) /* Maximum realistic size */
1911 count = vc->vc_rows;
1912 if (logo_shown >= 0)
1913 goto redraw_down;
1914 switch (p->scrollmode) {
1915 case SCROLL_MOVE:
1916 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1917 -count);
1918 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1919 scr_memsetw((unsigned short *) (vc->vc_origin +
1920 vc->vc_size_row *
1921 t),
1922 vc->vc_video_erase_char,
1923 vc->vc_size_row * count);
1924 return 1;
1925 break;
1926
1927 case SCROLL_WRAP_MOVE:
1928 if (b - t - count > 3 * vc->vc_rows >> 2) {
1929 if (vc->vc_rows - b > 0)
1930 fbcon_bmove(vc, b, 0, b - count, 0,
1931 vc->vc_rows - b,
1932 vc->vc_cols);
1933 ywrap_down(vc, count);
1934 if (t > 0)
1935 fbcon_bmove(vc, count, 0, 0, 0, t,
1936 vc->vc_cols);
1937 } else if (info->flags & FBINFO_READS_FAST)
1938 fbcon_bmove(vc, t, 0, t + count, 0,
1939 b - t - count, vc->vc_cols);
1940 else
1941 goto redraw_down;
1942 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1943 break;
1944
1945 case SCROLL_PAN_MOVE:
1946 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1947 && ((!scroll_partial && (b - t == vc->vc_rows))
1948 || (scroll_partial
1949 && (b - t - count >
1950 3 * vc->vc_rows >> 2)))) {
1951 if (vc->vc_rows - b > 0)
1952 fbcon_bmove(vc, b, 0, b - count, 0,
1953 vc->vc_rows - b,
1954 vc->vc_cols);
1955 ypan_down(vc, count);
1956 if (t > 0)
1957 fbcon_bmove(vc, count, 0, 0, 0, t,
1958 vc->vc_cols);
1959 } else if (info->flags & FBINFO_READS_FAST)
1960 fbcon_bmove(vc, t, 0, t + count, 0,
1961 b - t - count, vc->vc_cols);
1962 else
1963 goto redraw_down;
1964 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1965 break;
1966
1967 case SCROLL_PAN_REDRAW:
1968 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1969 && ((!scroll_partial && (b - t == vc->vc_rows))
1970 || (scroll_partial
1971 && (b - t - count >
1972 3 * vc->vc_rows >> 2)))) {
1973 if (vc->vc_rows - b > 0)
1974 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1975 b - count);
1976 ypan_down_redraw(vc, t, count);
1977 if (t > 0)
1978 fbcon_redraw_move(vc, p, count, t, 0);
1979 } else
1980 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1981 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1982 break;
1983
1984 case SCROLL_REDRAW:
1985 redraw_down:
1986 fbcon_redraw(vc, p, b - 1, b - t - count,
1987 -count * vc->vc_cols);
1988 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1989 scr_memsetw((unsigned short *) (vc->vc_origin +
1990 vc->vc_size_row *
1991 t),
1992 vc->vc_video_erase_char,
1993 vc->vc_size_row * count);
1994 return 1;
1995 }
1996 }
1997 return 0;
1998 }
1999
2000
2001 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2002 int height, int width)
2003 {
2004 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2005 struct display *p = &fb_display[vc->vc_num];
2006
2007 if (fbcon_is_inactive(vc, info))
2008 return;
2009
2010 if (!width || !height)
2011 return;
2012
2013 /* Split blits that cross physical y_wrap case.
2014 * Pathological case involves 4 blits, better to use recursive
2015 * code rather than unrolled case
2016 *
2017 * Recursive invocations don't need to erase the cursor over and
2018 * over again, so we use fbcon_bmove_rec()
2019 */
2020 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2021 p->vrows - p->yscroll);
2022 }
2023
2024 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2025 int dy, int dx, int height, int width, u_int y_break)
2026 {
2027 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2028 struct fbcon_ops *ops = info->fbcon_par;
2029 u_int b;
2030
2031 if (sy < y_break && sy + height > y_break) {
2032 b = y_break - sy;
2033 if (dy < sy) { /* Avoid trashing self */
2034 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2035 y_break);
2036 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2037 height - b, width, y_break);
2038 } else {
2039 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2040 height - b, width, y_break);
2041 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2042 y_break);
2043 }
2044 return;
2045 }
2046
2047 if (dy < y_break && dy + height > y_break) {
2048 b = y_break - dy;
2049 if (dy < sy) { /* Avoid trashing self */
2050 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2051 y_break);
2052 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2053 height - b, width, y_break);
2054 } else {
2055 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2056 height - b, width, y_break);
2057 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2058 y_break);
2059 }
2060 return;
2061 }
2062 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2063 height, width);
2064 }
2065
2066 static void updatescrollmode(struct display *p,
2067 struct fb_info *info,
2068 struct vc_data *vc)
2069 {
2070 struct fbcon_ops *ops = info->fbcon_par;
2071 int fh = vc->vc_font.height;
2072 int cap = info->flags;
2073 u16 t = 0;
2074 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2075 info->fix.xpanstep);
2076 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2077 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2078 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2079 info->var.xres_virtual);
2080 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2081 divides(ypan, vc->vc_font.height) && vyres > yres;
2082 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2083 divides(ywrap, vc->vc_font.height) &&
2084 divides(vc->vc_font.height, vyres) &&
2085 divides(vc->vc_font.height, yres);
2086 int reading_fast = cap & FBINFO_READS_FAST;
2087 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2088 !(cap & FBINFO_HWACCEL_DISABLED);
2089 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2090 !(cap & FBINFO_HWACCEL_DISABLED);
2091
2092 p->vrows = vyres/fh;
2093 if (yres > (fh * (vc->vc_rows + 1)))
2094 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2095 if ((yres % fh) && (vyres % fh < yres % fh))
2096 p->vrows--;
2097
2098 if (good_wrap || good_pan) {
2099 if (reading_fast || fast_copyarea)
2100 p->scrollmode = good_wrap ?
2101 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2102 else
2103 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2104 SCROLL_PAN_REDRAW;
2105 } else {
2106 if (reading_fast || (fast_copyarea && !fast_imageblit))
2107 p->scrollmode = SCROLL_MOVE;
2108 else
2109 p->scrollmode = SCROLL_REDRAW;
2110 }
2111 }
2112
2113 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2114 unsigned int height, unsigned int user)
2115 {
2116 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2117 struct fbcon_ops *ops = info->fbcon_par;
2118 struct display *p = &fb_display[vc->vc_num];
2119 struct fb_var_screeninfo var = info->var;
2120 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2121
2122 virt_w = FBCON_SWAP(ops->rotate, width, height);
2123 virt_h = FBCON_SWAP(ops->rotate, height, width);
2124 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2125 vc->vc_font.height);
2126 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2127 vc->vc_font.width);
2128 var.xres = virt_w * virt_fw;
2129 var.yres = virt_h * virt_fh;
2130 x_diff = info->var.xres - var.xres;
2131 y_diff = info->var.yres - var.yres;
2132 if (x_diff < 0 || x_diff > virt_fw ||
2133 y_diff < 0 || y_diff > virt_fh) {
2134 const struct fb_videomode *mode;
2135
2136 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2137 mode = fb_find_best_mode(&var, &info->modelist);
2138 if (mode == NULL)
2139 return -EINVAL;
2140 display_to_var(&var, p);
2141 fb_videomode_to_var(&var, mode);
2142
2143 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2144 return -EINVAL;
2145
2146 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2147 if (CON_IS_VISIBLE(vc)) {
2148 var.activate = FB_ACTIVATE_NOW |
2149 FB_ACTIVATE_FORCE;
2150 fb_set_var(info, &var);
2151 }
2152 var_to_display(p, &info->var, info);
2153 ops->var = info->var;
2154 }
2155 updatescrollmode(p, info, vc);
2156 return 0;
2157 }
2158
2159 static int fbcon_switch(struct vc_data *vc)
2160 {
2161 struct fb_info *info, *old_info = NULL;
2162 struct fbcon_ops *ops;
2163 struct display *p = &fb_display[vc->vc_num];
2164 struct fb_var_screeninfo var;
2165 int i, ret, prev_console, charcnt = 256;
2166
2167 info = registered_fb[con2fb_map[vc->vc_num]];
2168 ops = info->fbcon_par;
2169
2170 if (softback_top) {
2171 if (softback_lines)
2172 fbcon_set_origin(vc);
2173 softback_top = softback_curr = softback_in = softback_buf;
2174 softback_lines = 0;
2175 fbcon_update_softback(vc);
2176 }
2177
2178 if (logo_shown >= 0) {
2179 struct vc_data *conp2 = vc_cons[logo_shown].d;
2180
2181 if (conp2->vc_top == logo_lines
2182 && conp2->vc_bottom == conp2->vc_rows)
2183 conp2->vc_top = 0;
2184 logo_shown = FBCON_LOGO_CANSHOW;
2185 }
2186
2187 prev_console = ops->currcon;
2188 if (prev_console != -1)
2189 old_info = registered_fb[con2fb_map[prev_console]];
2190 /*
2191 * FIXME: If we have multiple fbdev's loaded, we need to
2192 * update all info->currcon. Perhaps, we can place this
2193 * in a centralized structure, but this might break some
2194 * drivers.
2195 *
2196 * info->currcon = vc->vc_num;
2197 */
2198 for (i = 0; i < FB_MAX; i++) {
2199 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2200 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2201
2202 o->currcon = vc->vc_num;
2203 }
2204 }
2205 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2206 display_to_var(&var, p);
2207 var.activate = FB_ACTIVATE_NOW;
2208
2209 /*
2210 * make sure we don't unnecessarily trip the memcmp()
2211 * in fb_set_var()
2212 */
2213 info->var.activate = var.activate;
2214 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2215 fb_set_var(info, &var);
2216 ops->var = info->var;
2217
2218 if (old_info != NULL && (old_info != info ||
2219 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2220 if (info->fbops->fb_set_par) {
2221 ret = info->fbops->fb_set_par(info);
2222
2223 if (ret)
2224 printk(KERN_ERR "fbcon_switch: detected "
2225 "unhandled fb_set_par error, "
2226 "error code %d\n", ret);
2227 }
2228
2229 if (old_info != info)
2230 fbcon_del_cursor_timer(old_info);
2231 }
2232
2233 if (fbcon_is_inactive(vc, info) ||
2234 ops->blank_state != FB_BLANK_UNBLANK)
2235 fbcon_del_cursor_timer(info);
2236 else
2237 fbcon_add_cursor_timer(info);
2238
2239 set_blitting_type(vc, info);
2240 ops->cursor_reset = 1;
2241
2242 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2243 ops->rotate = FB_ROTATE_UR;
2244 set_blitting_type(vc, info);
2245 }
2246
2247 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2248 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2249
2250 if (p->userfont)
2251 charcnt = FNTCHARCNT(vc->vc_font.data);
2252
2253 if (charcnt > 256)
2254 vc->vc_complement_mask <<= 1;
2255
2256 updatescrollmode(p, info, vc);
2257
2258 switch (p->scrollmode) {
2259 case SCROLL_WRAP_MOVE:
2260 scrollback_phys_max = p->vrows - vc->vc_rows;
2261 break;
2262 case SCROLL_PAN_MOVE:
2263 case SCROLL_PAN_REDRAW:
2264 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2265 if (scrollback_phys_max < 0)
2266 scrollback_phys_max = 0;
2267 break;
2268 default:
2269 scrollback_phys_max = 0;
2270 break;
2271 }
2272
2273 scrollback_max = 0;
2274 scrollback_current = 0;
2275
2276 if (!fbcon_is_inactive(vc, info)) {
2277 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2278 ops->update_start(info);
2279 }
2280
2281 fbcon_set_palette(vc, color_table);
2282 fbcon_clear_margins(vc, 0);
2283
2284 if (logo_shown == FBCON_LOGO_DRAW) {
2285
2286 logo_shown = fg_console;
2287 /* This is protected above by initmem_freed */
2288 fb_show_logo(info, ops->rotate);
2289 update_region(vc,
2290 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2291 vc->vc_size_row * (vc->vc_bottom -
2292 vc->vc_top) / 2);
2293 return 0;
2294 }
2295 return 1;
2296 }
2297
2298 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2299 int blank)
2300 {
2301 struct fb_event event;
2302
2303 if (blank) {
2304 unsigned short charmask = vc->vc_hi_font_mask ?
2305 0x1ff : 0xff;
2306 unsigned short oldc;
2307
2308 oldc = vc->vc_video_erase_char;
2309 vc->vc_video_erase_char &= charmask;
2310 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2311 vc->vc_video_erase_char = oldc;
2312 }
2313
2314
2315 if (!lock_fb_info(info))
2316 return;
2317 event.info = info;
2318 event.data = &blank;
2319 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2320 unlock_fb_info(info);
2321 }
2322
2323 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2324 {
2325 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2326 struct fbcon_ops *ops = info->fbcon_par;
2327
2328 if (mode_switch) {
2329 struct fb_var_screeninfo var = info->var;
2330
2331 ops->graphics = 1;
2332
2333 if (!blank) {
2334 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2335 fb_set_var(info, &var);
2336 ops->graphics = 0;
2337 ops->var = info->var;
2338 }
2339 }
2340
2341 if (!fbcon_is_inactive(vc, info)) {
2342 if (ops->blank_state != blank) {
2343 ops->blank_state = blank;
2344 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2345 ops->cursor_flash = (!blank);
2346
2347 if (!(info->flags & FBINFO_MISC_USEREVENT))
2348 if (fb_blank(info, blank))
2349 fbcon_generic_blank(vc, info, blank);
2350 }
2351
2352 if (!blank)
2353 update_screen(vc);
2354 }
2355
2356 if (mode_switch || fbcon_is_inactive(vc, info) ||
2357 ops->blank_state != FB_BLANK_UNBLANK)
2358 fbcon_del_cursor_timer(info);
2359 else
2360 fbcon_add_cursor_timer(info);
2361
2362 return 0;
2363 }
2364
2365 static int fbcon_debug_enter(struct vc_data *vc)
2366 {
2367 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2368 struct fbcon_ops *ops = info->fbcon_par;
2369
2370 ops->save_graphics = ops->graphics;
2371 ops->graphics = 0;
2372 if (info->fbops->fb_debug_enter)
2373 info->fbops->fb_debug_enter(info);
2374 fbcon_set_palette(vc, color_table);
2375 return 0;
2376 }
2377
2378 static int fbcon_debug_leave(struct vc_data *vc)
2379 {
2380 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2381 struct fbcon_ops *ops = info->fbcon_par;
2382
2383 ops->graphics = ops->save_graphics;
2384 if (info->fbops->fb_debug_leave)
2385 info->fbops->fb_debug_leave(info);
2386 return 0;
2387 }
2388
2389 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2390 {
2391 u8 *fontdata = vc->vc_font.data;
2392 u8 *data = font->data;
2393 int i, j;
2394
2395 font->width = vc->vc_font.width;
2396 font->height = vc->vc_font.height;
2397 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2398 if (!font->data)
2399 return 0;
2400
2401 if (font->width <= 8) {
2402 j = vc->vc_font.height;
2403 for (i = 0; i < font->charcount; i++) {
2404 memcpy(data, fontdata, j);
2405 memset(data + j, 0, 32 - j);
2406 data += 32;
2407 fontdata += j;
2408 }
2409 } else if (font->width <= 16) {
2410 j = vc->vc_font.height * 2;
2411 for (i = 0; i < font->charcount; i++) {
2412 memcpy(data, fontdata, j);
2413 memset(data + j, 0, 64 - j);
2414 data += 64;
2415 fontdata += j;
2416 }
2417 } else if (font->width <= 24) {
2418 for (i = 0; i < font->charcount; i++) {
2419 for (j = 0; j < vc->vc_font.height; j++) {
2420 *data++ = fontdata[0];
2421 *data++ = fontdata[1];
2422 *data++ = fontdata[2];
2423 fontdata += sizeof(u32);
2424 }
2425 memset(data, 0, 3 * (32 - j));
2426 data += 3 * (32 - j);
2427 }
2428 } else {
2429 j = vc->vc_font.height * 4;
2430 for (i = 0; i < font->charcount; i++) {
2431 memcpy(data, fontdata, j);
2432 memset(data + j, 0, 128 - j);
2433 data += 128;
2434 fontdata += j;
2435 }
2436 }
2437 return 0;
2438 }
2439
2440 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2441 const u8 * data, int userfont)
2442 {
2443 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2444 struct fbcon_ops *ops = info->fbcon_par;
2445 struct display *p = &fb_display[vc->vc_num];
2446 int resize;
2447 int cnt;
2448 char *old_data = NULL;
2449
2450 if (CON_IS_VISIBLE(vc) && softback_lines)
2451 fbcon_set_origin(vc);
2452
2453 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2454 if (p->userfont)
2455 old_data = vc->vc_font.data;
2456 if (userfont)
2457 cnt = FNTCHARCNT(data);
2458 else
2459 cnt = 256;
2460 vc->vc_font.data = (void *)(p->fontdata = data);
2461 if ((p->userfont = userfont))
2462 REFCOUNT(data)++;
2463 vc->vc_font.width = w;
2464 vc->vc_font.height = h;
2465 if (vc->vc_hi_font_mask && cnt == 256) {
2466 vc->vc_hi_font_mask = 0;
2467 if (vc->vc_can_do_color) {
2468 vc->vc_complement_mask >>= 1;
2469 vc->vc_s_complement_mask >>= 1;
2470 }
2471
2472 /* ++Edmund: reorder the attribute bits */
2473 if (vc->vc_can_do_color) {
2474 unsigned short *cp =
2475 (unsigned short *) vc->vc_origin;
2476 int count = vc->vc_screenbuf_size / 2;
2477 unsigned short c;
2478 for (; count > 0; count--, cp++) {
2479 c = scr_readw(cp);
2480 scr_writew(((c & 0xfe00) >> 1) |
2481 (c & 0xff), cp);
2482 }
2483 c = vc->vc_video_erase_char;
2484 vc->vc_video_erase_char =
2485 ((c & 0xfe00) >> 1) | (c & 0xff);
2486 vc->vc_attr >>= 1;
2487 }
2488 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2489 vc->vc_hi_font_mask = 0x100;
2490 if (vc->vc_can_do_color) {
2491 vc->vc_complement_mask <<= 1;
2492 vc->vc_s_complement_mask <<= 1;
2493 }
2494
2495 /* ++Edmund: reorder the attribute bits */
2496 {
2497 unsigned short *cp =
2498 (unsigned short *) vc->vc_origin;
2499 int count = vc->vc_screenbuf_size / 2;
2500 unsigned short c;
2501 for (; count > 0; count--, cp++) {
2502 unsigned short newc;
2503 c = scr_readw(cp);
2504 if (vc->vc_can_do_color)
2505 newc =
2506 ((c & 0xff00) << 1) | (c &
2507 0xff);
2508 else
2509 newc = c & ~0x100;
2510 scr_writew(newc, cp);
2511 }
2512 c = vc->vc_video_erase_char;
2513 if (vc->vc_can_do_color) {
2514 vc->vc_video_erase_char =
2515 ((c & 0xff00) << 1) | (c & 0xff);
2516 vc->vc_attr <<= 1;
2517 } else
2518 vc->vc_video_erase_char = c & ~0x100;
2519 }
2520
2521 }
2522
2523 if (resize) {
2524 int cols, rows;
2525
2526 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2527 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2528 cols /= w;
2529 rows /= h;
2530 vc_resize(vc, cols, rows);
2531 if (CON_IS_VISIBLE(vc) && softback_buf)
2532 fbcon_update_softback(vc);
2533 } else if (CON_IS_VISIBLE(vc)
2534 && vc->vc_mode == KD_TEXT) {
2535 fbcon_clear_margins(vc, 0);
2536 update_screen(vc);
2537 }
2538
2539 if (old_data && (--REFCOUNT(old_data) == 0))
2540 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2541 return 0;
2542 }
2543
2544 static int fbcon_copy_font(struct vc_data *vc, int con)
2545 {
2546 struct display *od = &fb_display[con];
2547 struct console_font *f = &vc->vc_font;
2548
2549 if (od->fontdata == f->data)
2550 return 0; /* already the same font... */
2551 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2552 }
2553
2554 /*
2555 * User asked to set font; we are guaranteed that
2556 * a) width and height are in range 1..32
2557 * b) charcount does not exceed 512
2558 * but lets not assume that, since someone might someday want to use larger
2559 * fonts. And charcount of 512 is small for unicode support.
2560 *
2561 * However, user space gives the font in 32 rows , regardless of
2562 * actual font height. So a new API is needed if support for larger fonts
2563 * is ever implemented.
2564 */
2565
2566 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2567 {
2568 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2569 unsigned charcount = font->charcount;
2570 int w = font->width;
2571 int h = font->height;
2572 int size;
2573 int i, csum;
2574 u8 *new_data, *data = font->data;
2575 int pitch = (font->width+7) >> 3;
2576
2577 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2578 * If not this check should be changed to charcount < 256 */
2579 if (charcount != 256 && charcount != 512)
2580 return -EINVAL;
2581
2582 /* Make sure drawing engine can handle the font */
2583 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2584 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2585 return -EINVAL;
2586
2587 /* Make sure driver can handle the font length */
2588 if (fbcon_invalid_charcount(info, charcount))
2589 return -EINVAL;
2590
2591 size = h * pitch * charcount;
2592
2593 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2594
2595 if (!new_data)
2596 return -ENOMEM;
2597
2598 new_data += FONT_EXTRA_WORDS * sizeof(int);
2599 FNTSIZE(new_data) = size;
2600 FNTCHARCNT(new_data) = charcount;
2601 REFCOUNT(new_data) = 0; /* usage counter */
2602 for (i=0; i< charcount; i++) {
2603 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2604 }
2605
2606 /* Since linux has a nice crc32 function use it for counting font
2607 * checksums. */
2608 csum = crc32(0, new_data, size);
2609
2610 FNTSUM(new_data) = csum;
2611 /* Check if the same font is on some other console already */
2612 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2613 struct vc_data *tmp = vc_cons[i].d;
2614
2615 if (fb_display[i].userfont &&
2616 fb_display[i].fontdata &&
2617 FNTSUM(fb_display[i].fontdata) == csum &&
2618 FNTSIZE(fb_display[i].fontdata) == size &&
2619 tmp->vc_font.width == w &&
2620 !memcmp(fb_display[i].fontdata, new_data, size)) {
2621 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2622 new_data = (u8 *)fb_display[i].fontdata;
2623 break;
2624 }
2625 }
2626 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2627 }
2628
2629 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2630 {
2631 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2632 const struct font_desc *f;
2633
2634 if (!name)
2635 f = get_default_font(info->var.xres, info->var.yres,
2636 info->pixmap.blit_x, info->pixmap.blit_y);
2637 else if (!(f = find_font(name)))
2638 return -ENOENT;
2639
2640 font->width = f->width;
2641 font->height = f->height;
2642 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2643 }
2644
2645 static u16 palette_red[16];
2646 static u16 palette_green[16];
2647 static u16 palette_blue[16];
2648
2649 static struct fb_cmap palette_cmap = {
2650 0, 16, palette_red, palette_green, palette_blue, NULL
2651 };
2652
2653 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2654 {
2655 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2656 int i, j, k, depth;
2657 u8 val;
2658
2659 if (fbcon_is_inactive(vc, info))
2660 return -EINVAL;
2661
2662 if (!CON_IS_VISIBLE(vc))
2663 return 0;
2664
2665 depth = fb_get_color_depth(&info->var, &info->fix);
2666 if (depth > 3) {
2667 for (i = j = 0; i < 16; i++) {
2668 k = table[i];
2669 val = vc->vc_palette[j++];
2670 palette_red[k] = (val << 8) | val;
2671 val = vc->vc_palette[j++];
2672 palette_green[k] = (val << 8) | val;
2673 val = vc->vc_palette[j++];
2674 palette_blue[k] = (val << 8) | val;
2675 }
2676 palette_cmap.len = 16;
2677 palette_cmap.start = 0;
2678 /*
2679 * If framebuffer is capable of less than 16 colors,
2680 * use default palette of fbcon.
2681 */
2682 } else
2683 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2684
2685 return fb_set_cmap(&palette_cmap, info);
2686 }
2687
2688 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2689 {
2690 unsigned long p;
2691 int line;
2692
2693 if (vc->vc_num != fg_console || !softback_lines)
2694 return (u16 *) (vc->vc_origin + offset);
2695 line = offset / vc->vc_size_row;
2696 if (line >= softback_lines)
2697 return (u16 *) (vc->vc_origin + offset -
2698 softback_lines * vc->vc_size_row);
2699 p = softback_curr + offset;
2700 if (p >= softback_end)
2701 p += softback_buf - softback_end;
2702 return (u16 *) p;
2703 }
2704
2705 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2706 int *px, int *py)
2707 {
2708 unsigned long ret;
2709 int x, y;
2710
2711 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2712 unsigned long offset = (pos - vc->vc_origin) / 2;
2713
2714 x = offset % vc->vc_cols;
2715 y = offset / vc->vc_cols;
2716 if (vc->vc_num == fg_console)
2717 y += softback_lines;
2718 ret = pos + (vc->vc_cols - x) * 2;
2719 } else if (vc->vc_num == fg_console && softback_lines) {
2720 unsigned long offset = pos - softback_curr;
2721
2722 if (pos < softback_curr)
2723 offset += softback_end - softback_buf;
2724 offset /= 2;
2725 x = offset % vc->vc_cols;
2726 y = offset / vc->vc_cols;
2727 ret = pos + (vc->vc_cols - x) * 2;
2728 if (ret == softback_end)
2729 ret = softback_buf;
2730 if (ret == softback_in)
2731 ret = vc->vc_origin;
2732 } else {
2733 /* Should not happen */
2734 x = y = 0;
2735 ret = vc->vc_origin;
2736 }
2737 if (px)
2738 *px = x;
2739 if (py)
2740 *py = y;
2741 return ret;
2742 }
2743
2744 /* As we might be inside of softback, we may work with non-contiguous buffer,
2745 that's why we have to use a separate routine. */
2746 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2747 {
2748 while (cnt--) {
2749 u16 a = scr_readw(p);
2750 if (!vc->vc_can_do_color)
2751 a ^= 0x0800;
2752 else if (vc->vc_hi_font_mask == 0x100)
2753 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2754 (((a) & 0x0e00) << 4);
2755 else
2756 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2757 (((a) & 0x0700) << 4);
2758 scr_writew(a, p++);
2759 if (p == (u16 *) softback_end)
2760 p = (u16 *) softback_buf;
2761 if (p == (u16 *) softback_in)
2762 p = (u16 *) vc->vc_origin;
2763 }
2764 }
2765
2766 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2767 {
2768 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2769 struct fbcon_ops *ops = info->fbcon_par;
2770 struct display *disp = &fb_display[fg_console];
2771 int offset, limit, scrollback_old;
2772
2773 if (softback_top) {
2774 if (vc->vc_num != fg_console)
2775 return 0;
2776 if (vc->vc_mode != KD_TEXT || !lines)
2777 return 0;
2778 if (logo_shown >= 0) {
2779 struct vc_data *conp2 = vc_cons[logo_shown].d;
2780
2781 if (conp2->vc_top == logo_lines
2782 && conp2->vc_bottom == conp2->vc_rows)
2783 conp2->vc_top = 0;
2784 if (logo_shown == vc->vc_num) {
2785 unsigned long p, q;
2786 int i;
2787
2788 p = softback_in;
2789 q = vc->vc_origin +
2790 logo_lines * vc->vc_size_row;
2791 for (i = 0; i < logo_lines; i++) {
2792 if (p == softback_top)
2793 break;
2794 if (p == softback_buf)
2795 p = softback_end;
2796 p -= vc->vc_size_row;
2797 q -= vc->vc_size_row;
2798 scr_memcpyw((u16 *) q, (u16 *) p,
2799 vc->vc_size_row);
2800 }
2801 softback_in = softback_curr = p;
2802 update_region(vc, vc->vc_origin,
2803 logo_lines * vc->vc_cols);
2804 }
2805 logo_shown = FBCON_LOGO_CANSHOW;
2806 }
2807 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2808 fbcon_redraw_softback(vc, disp, lines);
2809 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2810 return 0;
2811 }
2812
2813 if (!scrollback_phys_max)
2814 return -ENOSYS;
2815
2816 scrollback_old = scrollback_current;
2817 scrollback_current -= lines;
2818 if (scrollback_current < 0)
2819 scrollback_current = 0;
2820 else if (scrollback_current > scrollback_max)
2821 scrollback_current = scrollback_max;
2822 if (scrollback_current == scrollback_old)
2823 return 0;
2824
2825 if (fbcon_is_inactive(vc, info))
2826 return 0;
2827
2828 fbcon_cursor(vc, CM_ERASE);
2829
2830 offset = disp->yscroll - scrollback_current;
2831 limit = disp->vrows;
2832 switch (disp->scrollmode) {
2833 case SCROLL_WRAP_MOVE:
2834 info->var.vmode |= FB_VMODE_YWRAP;
2835 break;
2836 case SCROLL_PAN_MOVE:
2837 case SCROLL_PAN_REDRAW:
2838 limit -= vc->vc_rows;
2839 info->var.vmode &= ~FB_VMODE_YWRAP;
2840 break;
2841 }
2842 if (offset < 0)
2843 offset += limit;
2844 else if (offset >= limit)
2845 offset -= limit;
2846
2847 ops->var.xoffset = 0;
2848 ops->var.yoffset = offset * vc->vc_font.height;
2849 ops->update_start(info);
2850
2851 if (!scrollback_current)
2852 fbcon_cursor(vc, CM_DRAW);
2853 return 0;
2854 }
2855
2856 static int fbcon_set_origin(struct vc_data *vc)
2857 {
2858 if (softback_lines)
2859 fbcon_scrolldelta(vc, softback_lines);
2860 return 0;
2861 }
2862
2863 static void fbcon_suspended(struct fb_info *info)
2864 {
2865 struct vc_data *vc = NULL;
2866 struct fbcon_ops *ops = info->fbcon_par;
2867
2868 if (!ops || ops->currcon < 0)
2869 return;
2870 vc = vc_cons[ops->currcon].d;
2871
2872 /* Clear cursor, restore saved data */
2873 fbcon_cursor(vc, CM_ERASE);
2874 }
2875
2876 static void fbcon_resumed(struct fb_info *info)
2877 {
2878 struct vc_data *vc;
2879 struct fbcon_ops *ops = info->fbcon_par;
2880
2881 if (!ops || ops->currcon < 0)
2882 return;
2883 vc = vc_cons[ops->currcon].d;
2884
2885 update_screen(vc);
2886 }
2887
2888 static void fbcon_modechanged(struct fb_info *info)
2889 {
2890 struct fbcon_ops *ops = info->fbcon_par;
2891 struct vc_data *vc;
2892 struct display *p;
2893 int rows, cols;
2894
2895 if (!ops || ops->currcon < 0)
2896 return;
2897 vc = vc_cons[ops->currcon].d;
2898 if (vc->vc_mode != KD_TEXT ||
2899 registered_fb[con2fb_map[ops->currcon]] != info)
2900 return;
2901
2902 p = &fb_display[vc->vc_num];
2903 set_blitting_type(vc, info);
2904
2905 if (CON_IS_VISIBLE(vc)) {
2906 var_to_display(p, &info->var, info);
2907 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2908 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2909 cols /= vc->vc_font.width;
2910 rows /= vc->vc_font.height;
2911 vc_resize(vc, cols, rows);
2912 updatescrollmode(p, info, vc);
2913 scrollback_max = 0;
2914 scrollback_current = 0;
2915
2916 if (!fbcon_is_inactive(vc, info)) {
2917 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2918 ops->update_start(info);
2919 }
2920
2921 fbcon_set_palette(vc, color_table);
2922 update_screen(vc);
2923 if (softback_buf)
2924 fbcon_update_softback(vc);
2925 }
2926 }
2927
2928 static void fbcon_set_all_vcs(struct fb_info *info)
2929 {
2930 struct fbcon_ops *ops = info->fbcon_par;
2931 struct vc_data *vc;
2932 struct display *p;
2933 int i, rows, cols, fg = -1;
2934
2935 if (!ops || ops->currcon < 0)
2936 return;
2937
2938 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2939 vc = vc_cons[i].d;
2940 if (!vc || vc->vc_mode != KD_TEXT ||
2941 registered_fb[con2fb_map[i]] != info)
2942 continue;
2943
2944 if (CON_IS_VISIBLE(vc)) {
2945 fg = i;
2946 continue;
2947 }
2948
2949 p = &fb_display[vc->vc_num];
2950 set_blitting_type(vc, info);
2951 var_to_display(p, &info->var, info);
2952 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2953 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2954 cols /= vc->vc_font.width;
2955 rows /= vc->vc_font.height;
2956 vc_resize(vc, cols, rows);
2957 }
2958
2959 if (fg != -1)
2960 fbcon_modechanged(info);
2961 }
2962
2963 static int fbcon_mode_deleted(struct fb_info *info,
2964 struct fb_videomode *mode)
2965 {
2966 struct fb_info *fb_info;
2967 struct display *p;
2968 int i, j, found = 0;
2969
2970 /* before deletion, ensure that mode is not in use */
2971 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2972 j = con2fb_map[i];
2973 if (j == -1)
2974 continue;
2975 fb_info = registered_fb[j];
2976 if (fb_info != info)
2977 continue;
2978 p = &fb_display[i];
2979 if (!p || !p->mode)
2980 continue;
2981 if (fb_mode_is_equal(p->mode, mode)) {
2982 found = 1;
2983 break;
2984 }
2985 }
2986 return found;
2987 }
2988
2989 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2990 static int fbcon_unbind(void)
2991 {
2992 int ret;
2993
2994 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2995 fbcon_is_default);
2996
2997 if (!ret)
2998 fbcon_has_console_bind = 0;
2999
3000 return ret;
3001 }
3002 #else
3003 static inline int fbcon_unbind(void)
3004 {
3005 return -EINVAL;
3006 }
3007 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3008
3009 /* called with console_lock held */
3010 static int fbcon_fb_unbind(int idx)
3011 {
3012 int i, new_idx = -1, ret = 0;
3013
3014 if (!fbcon_has_console_bind)
3015 return 0;
3016
3017 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3018 if (con2fb_map[i] != idx &&
3019 con2fb_map[i] != -1) {
3020 new_idx = i;
3021 break;
3022 }
3023 }
3024
3025 if (new_idx != -1) {
3026 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3027 if (con2fb_map[i] == idx)
3028 set_con2fb_map(i, new_idx, 0);
3029 }
3030 } else {
3031 struct fb_info *info = registered_fb[idx];
3032
3033 /* This is sort of like set_con2fb_map, except it maps
3034 * the consoles to no device and then releases the
3035 * oldinfo to free memory and cancel the cursor blink
3036 * timer. I can imagine this just becoming part of
3037 * set_con2fb_map where new_idx is -1
3038 */
3039 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3040 if (con2fb_map[i] == idx) {
3041 con2fb_map[i] = -1;
3042 if (!search_fb_in_map(idx)) {
3043 ret = con2fb_release_oldinfo(vc_cons[i].d,
3044 info, NULL, i,
3045 idx, 0);
3046 if (ret) {
3047 con2fb_map[i] = idx;
3048 return ret;
3049 }
3050 }
3051 }
3052 }
3053 ret = fbcon_unbind();
3054 }
3055
3056 return ret;
3057 }
3058
3059 /* called with console_lock held */
3060 static int fbcon_fb_unregistered(struct fb_info *info)
3061 {
3062 int i, idx;
3063
3064 idx = info->node;
3065 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3066 if (con2fb_map[i] == idx)
3067 con2fb_map[i] = -1;
3068 }
3069
3070 if (idx == info_idx) {
3071 info_idx = -1;
3072
3073 for (i = 0; i < FB_MAX; i++) {
3074 if (registered_fb[i] != NULL) {
3075 info_idx = i;
3076 break;
3077 }
3078 }
3079 }
3080
3081 if (info_idx != -1) {
3082 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3083 if (con2fb_map[i] == -1)
3084 con2fb_map[i] = info_idx;
3085 }
3086 }
3087
3088 if (primary_device == idx)
3089 primary_device = -1;
3090
3091 if (!num_registered_fb)
3092 do_unregister_con_driver(&fb_con);
3093
3094 return 0;
3095 }
3096
3097 /* called with console_lock held */
3098 static void fbcon_remap_all(int idx)
3099 {
3100 int i;
3101 for (i = first_fb_vc; i <= last_fb_vc; i++)
3102 set_con2fb_map(i, idx, 0);
3103
3104 if (con_is_bound(&fb_con)) {
3105 printk(KERN_INFO "fbcon: Remapping primary device, "
3106 "fb%i, to tty %i-%i\n", idx,
3107 first_fb_vc + 1, last_fb_vc + 1);
3108 info_idx = idx;
3109 }
3110 }
3111
3112 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3113 static void fbcon_select_primary(struct fb_info *info)
3114 {
3115 if (!map_override && primary_device == -1 &&
3116 fb_is_primary_device(info)) {
3117 int i;
3118
3119 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3120 info->fix.id, info->node);
3121 primary_device = info->node;
3122
3123 for (i = first_fb_vc; i <= last_fb_vc; i++)
3124 con2fb_map_boot[i] = primary_device;
3125
3126 if (con_is_bound(&fb_con)) {
3127 printk(KERN_INFO "fbcon: Remapping primary device, "
3128 "fb%i, to tty %i-%i\n", info->node,
3129 first_fb_vc + 1, last_fb_vc + 1);
3130 info_idx = primary_device;
3131 }
3132 }
3133
3134 }
3135 #else
3136 static inline void fbcon_select_primary(struct fb_info *info)
3137 {
3138 return;
3139 }
3140 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3141
3142 /* called with console_lock held */
3143 static int fbcon_fb_registered(struct fb_info *info)
3144 {
3145 int ret = 0, i, idx;
3146
3147 idx = info->node;
3148 fbcon_select_primary(info);
3149
3150 if (info_idx == -1) {
3151 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3152 if (con2fb_map_boot[i] == idx) {
3153 info_idx = idx;
3154 break;
3155 }
3156 }
3157
3158 if (info_idx != -1)
3159 ret = do_fbcon_takeover(1);
3160 } else {
3161 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3162 if (con2fb_map_boot[i] == idx)
3163 set_con2fb_map(i, idx, 0);
3164 }
3165 }
3166
3167 return ret;
3168 }
3169
3170 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3171 {
3172 struct fbcon_ops *ops = info->fbcon_par;
3173 struct vc_data *vc;
3174
3175 if (!ops || ops->currcon < 0)
3176 return;
3177
3178 vc = vc_cons[ops->currcon].d;
3179 if (vc->vc_mode != KD_TEXT ||
3180 registered_fb[con2fb_map[ops->currcon]] != info)
3181 return;
3182
3183 if (CON_IS_VISIBLE(vc)) {
3184 if (blank)
3185 do_blank_screen(0);
3186 else
3187 do_unblank_screen(0);
3188 }
3189 ops->blank_state = blank;
3190 }
3191
3192 static void fbcon_new_modelist(struct fb_info *info)
3193 {
3194 int i;
3195 struct vc_data *vc;
3196 struct fb_var_screeninfo var;
3197 const struct fb_videomode *mode;
3198
3199 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3200 if (registered_fb[con2fb_map[i]] != info)
3201 continue;
3202 if (!fb_display[i].mode)
3203 continue;
3204 vc = vc_cons[i].d;
3205 display_to_var(&var, &fb_display[i]);
3206 mode = fb_find_nearest_mode(fb_display[i].mode,
3207 &info->modelist);
3208 fb_videomode_to_var(&var, mode);
3209 fbcon_set_disp(info, &var, vc->vc_num);
3210 }
3211 }
3212
3213 static void fbcon_get_requirement(struct fb_info *info,
3214 struct fb_blit_caps *caps)
3215 {
3216 struct vc_data *vc;
3217 struct display *p;
3218
3219 if (caps->flags) {
3220 int i, charcnt;
3221
3222 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3223 vc = vc_cons[i].d;
3224 if (vc && vc->vc_mode == KD_TEXT &&
3225 info->node == con2fb_map[i]) {
3226 p = &fb_display[i];
3227 caps->x |= 1 << (vc->vc_font.width - 1);
3228 caps->y |= 1 << (vc->vc_font.height - 1);
3229 charcnt = (p->userfont) ?
3230 FNTCHARCNT(p->fontdata) : 256;
3231 if (caps->len < charcnt)
3232 caps->len = charcnt;
3233 }
3234 }
3235 } else {
3236 vc = vc_cons[fg_console].d;
3237
3238 if (vc && vc->vc_mode == KD_TEXT &&
3239 info->node == con2fb_map[fg_console]) {
3240 p = &fb_display[fg_console];
3241 caps->x = 1 << (vc->vc_font.width - 1);
3242 caps->y = 1 << (vc->vc_font.height - 1);
3243 caps->len = (p->userfont) ?
3244 FNTCHARCNT(p->fontdata) : 256;
3245 }
3246 }
3247 }
3248
3249 static int fbcon_event_notify(struct notifier_block *self,
3250 unsigned long action, void *data)
3251 {
3252 struct fb_event *event = data;
3253 struct fb_info *info = event->info;
3254 struct fb_videomode *mode;
3255 struct fb_con2fbmap *con2fb;
3256 struct fb_blit_caps *caps;
3257 int idx, ret = 0;
3258
3259 /*
3260 * ignore all events except driver registration and deregistration
3261 * if fbcon is not active
3262 */
3263 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3264 action == FB_EVENT_FB_UNREGISTERED))
3265 goto done;
3266
3267 switch(action) {
3268 case FB_EVENT_SUSPEND:
3269 fbcon_suspended(info);
3270 break;
3271 case FB_EVENT_RESUME:
3272 fbcon_resumed(info);
3273 break;
3274 case FB_EVENT_MODE_CHANGE:
3275 fbcon_modechanged(info);
3276 break;
3277 case FB_EVENT_MODE_CHANGE_ALL:
3278 fbcon_set_all_vcs(info);
3279 break;
3280 case FB_EVENT_MODE_DELETE:
3281 mode = event->data;
3282 ret = fbcon_mode_deleted(info, mode);
3283 break;
3284 case FB_EVENT_FB_UNBIND:
3285 idx = info->node;
3286 ret = fbcon_fb_unbind(idx);
3287 break;
3288 case FB_EVENT_FB_REGISTERED:
3289 ret = fbcon_fb_registered(info);
3290 break;
3291 case FB_EVENT_FB_UNREGISTERED:
3292 ret = fbcon_fb_unregistered(info);
3293 break;
3294 case FB_EVENT_SET_CONSOLE_MAP:
3295 /* called with console lock held */
3296 con2fb = event->data;
3297 ret = set_con2fb_map(con2fb->console - 1,
3298 con2fb->framebuffer, 1);
3299 break;
3300 case FB_EVENT_GET_CONSOLE_MAP:
3301 con2fb = event->data;
3302 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3303 break;
3304 case FB_EVENT_BLANK:
3305 fbcon_fb_blanked(info, *(int *)event->data);
3306 break;
3307 case FB_EVENT_NEW_MODELIST:
3308 fbcon_new_modelist(info);
3309 break;
3310 case FB_EVENT_GET_REQ:
3311 caps = event->data;
3312 fbcon_get_requirement(info, caps);
3313 break;
3314 case FB_EVENT_REMAP_ALL_CONSOLE:
3315 idx = info->node;
3316 fbcon_remap_all(idx);
3317 break;
3318 }
3319 done:
3320 return ret;
3321 }
3322
3323 /*
3324 * The console `switch' structure for the frame buffer based console
3325 */
3326
3327 static const struct consw fb_con = {
3328 .owner = THIS_MODULE,
3329 .con_startup = fbcon_startup,
3330 .con_init = fbcon_init,
3331 .con_deinit = fbcon_deinit,
3332 .con_clear = fbcon_clear,
3333 .con_putc = fbcon_putc,
3334 .con_putcs = fbcon_putcs,
3335 .con_cursor = fbcon_cursor,
3336 .con_scroll = fbcon_scroll,
3337 .con_bmove = fbcon_bmove,
3338 .con_switch = fbcon_switch,
3339 .con_blank = fbcon_blank,
3340 .con_font_set = fbcon_set_font,
3341 .con_font_get = fbcon_get_font,
3342 .con_font_default = fbcon_set_def_font,
3343 .con_font_copy = fbcon_copy_font,
3344 .con_set_palette = fbcon_set_palette,
3345 .con_scrolldelta = fbcon_scrolldelta,
3346 .con_set_origin = fbcon_set_origin,
3347 .con_invert_region = fbcon_invert_region,
3348 .con_screen_pos = fbcon_screen_pos,
3349 .con_getxy = fbcon_getxy,
3350 .con_resize = fbcon_resize,
3351 .con_debug_enter = fbcon_debug_enter,
3352 .con_debug_leave = fbcon_debug_leave,
3353 };
3354
3355 static struct notifier_block fbcon_event_notifier = {
3356 .notifier_call = fbcon_event_notify,
3357 };
3358
3359 static ssize_t store_rotate(struct device *device,
3360 struct device_attribute *attr, const char *buf,
3361 size_t count)
3362 {
3363 struct fb_info *info;
3364 int rotate, idx;
3365 char **last = NULL;
3366
3367 if (fbcon_has_exited)
3368 return count;
3369
3370 console_lock();
3371 idx = con2fb_map[fg_console];
3372
3373 if (idx == -1 || registered_fb[idx] == NULL)
3374 goto err;
3375
3376 info = registered_fb[idx];
3377 rotate = simple_strtoul(buf, last, 0);
3378 fbcon_rotate(info, rotate);
3379 err:
3380 console_unlock();
3381 return count;
3382 }
3383
3384 static ssize_t store_rotate_all(struct device *device,
3385 struct device_attribute *attr,const char *buf,
3386 size_t count)
3387 {
3388 struct fb_info *info;
3389 int rotate, idx;
3390 char **last = NULL;
3391
3392 if (fbcon_has_exited)
3393 return count;
3394
3395 console_lock();
3396 idx = con2fb_map[fg_console];
3397
3398 if (idx == -1 || registered_fb[idx] == NULL)
3399 goto err;
3400
3401 info = registered_fb[idx];
3402 rotate = simple_strtoul(buf, last, 0);
3403 fbcon_rotate_all(info, rotate);
3404 err:
3405 console_unlock();
3406 return count;
3407 }
3408
3409 static ssize_t show_rotate(struct device *device,
3410 struct device_attribute *attr,char *buf)
3411 {
3412 struct fb_info *info;
3413 int rotate = 0, idx;
3414
3415 if (fbcon_has_exited)
3416 return 0;
3417
3418 console_lock();
3419 idx = con2fb_map[fg_console];
3420
3421 if (idx == -1 || registered_fb[idx] == NULL)
3422 goto err;
3423
3424 info = registered_fb[idx];
3425 rotate = fbcon_get_rotate(info);
3426 err:
3427 console_unlock();
3428 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3429 }
3430
3431 static ssize_t show_cursor_blink(struct device *device,
3432 struct device_attribute *attr, char *buf)
3433 {
3434 struct fb_info *info;
3435 struct fbcon_ops *ops;
3436 int idx, blink = -1;
3437
3438 if (fbcon_has_exited)
3439 return 0;
3440
3441 console_lock();
3442 idx = con2fb_map[fg_console];
3443
3444 if (idx == -1 || registered_fb[idx] == NULL)
3445 goto err;
3446
3447 info = registered_fb[idx];
3448 ops = info->fbcon_par;
3449
3450 if (!ops)
3451 goto err;
3452
3453 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3454 err:
3455 console_unlock();
3456 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3457 }
3458
3459 static ssize_t store_cursor_blink(struct device *device,
3460 struct device_attribute *attr,
3461 const char *buf, size_t count)
3462 {
3463 struct fb_info *info;
3464 int blink, idx;
3465 char **last = NULL;
3466
3467 if (fbcon_has_exited)
3468 return count;
3469
3470 console_lock();
3471 idx = con2fb_map[fg_console];
3472
3473 if (idx == -1 || registered_fb[idx] == NULL)
3474 goto err;
3475
3476 info = registered_fb[idx];
3477
3478 if (!info->fbcon_par)
3479 goto err;
3480
3481 blink = simple_strtoul(buf, last, 0);
3482
3483 if (blink) {
3484 fbcon_cursor_noblink = 0;
3485 fbcon_add_cursor_timer(info);
3486 } else {
3487 fbcon_cursor_noblink = 1;
3488 fbcon_del_cursor_timer(info);
3489 }
3490
3491 err:
3492 console_unlock();
3493 return count;
3494 }
3495
3496 static struct device_attribute device_attrs[] = {
3497 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3498 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3499 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3500 store_cursor_blink),
3501 };
3502
3503 static int fbcon_init_device(void)
3504 {
3505 int i, error = 0;
3506
3507 fbcon_has_sysfs = 1;
3508
3509 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3510 error = device_create_file(fbcon_device, &device_attrs[i]);
3511
3512 if (error)
3513 break;
3514 }
3515
3516 if (error) {
3517 while (--i >= 0)
3518 device_remove_file(fbcon_device, &device_attrs[i]);
3519
3520 fbcon_has_sysfs = 0;
3521 }
3522
3523 return 0;
3524 }
3525
3526 static void fbcon_start(void)
3527 {
3528 if (num_registered_fb) {
3529 int i;
3530
3531 console_lock();
3532
3533 for (i = 0; i < FB_MAX; i++) {
3534 if (registered_fb[i] != NULL) {
3535 info_idx = i;
3536 break;
3537 }
3538 }
3539
3540 do_fbcon_takeover(0);
3541 console_unlock();
3542
3543 }
3544 }
3545
3546 static void fbcon_exit(void)
3547 {
3548 struct fb_info *info;
3549 int i, j, mapped;
3550
3551 if (fbcon_has_exited)
3552 return;
3553
3554 kfree((void *)softback_buf);
3555 softback_buf = 0UL;
3556
3557 for (i = 0; i < FB_MAX; i++) {
3558 int pending = 0;
3559
3560 mapped = 0;
3561 info = registered_fb[i];
3562
3563 if (info == NULL)
3564 continue;
3565
3566 if (info->queue.func)
3567 pending = cancel_work_sync(&info->queue);
3568 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3569 "no"));
3570
3571 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3572 if (con2fb_map[j] == i) {
3573 mapped = 1;
3574 break;
3575 }
3576 }
3577
3578 if (mapped) {
3579 if (info->fbops->fb_release)
3580 info->fbops->fb_release(info, 0);
3581 module_put(info->fbops->owner);
3582
3583 if (info->fbcon_par) {
3584 struct fbcon_ops *ops = info->fbcon_par;
3585
3586 fbcon_del_cursor_timer(info);
3587 kfree(ops->cursor_src);
3588 kfree(ops->cursor_state.mask);
3589 kfree(info->fbcon_par);
3590 info->fbcon_par = NULL;
3591 }
3592
3593 if (info->queue.func == fb_flashcursor)
3594 info->queue.func = NULL;
3595 }
3596 }
3597
3598 fbcon_has_exited = 1;
3599 }
3600
3601 static int __init fb_console_init(void)
3602 {
3603 int i;
3604
3605 console_lock();
3606 fb_register_client(&fbcon_event_notifier);
3607 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3608 "fbcon");
3609
3610 if (IS_ERR(fbcon_device)) {
3611 printk(KERN_WARNING "Unable to create device "
3612 "for fbcon; errno = %ld\n",
3613 PTR_ERR(fbcon_device));
3614 fbcon_device = NULL;
3615 } else
3616 fbcon_init_device();
3617
3618 for (i = 0; i < MAX_NR_CONSOLES; i++)
3619 con2fb_map[i] = -1;
3620
3621 console_unlock();
3622 fbcon_start();
3623 return 0;
3624 }
3625
3626 fs_initcall(fb_console_init);
3627
3628 #ifdef MODULE
3629
3630 static void __exit fbcon_deinit_device(void)
3631 {
3632 int i;
3633
3634 if (fbcon_has_sysfs) {
3635 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3636 device_remove_file(fbcon_device, &device_attrs[i]);
3637
3638 fbcon_has_sysfs = 0;
3639 }
3640 }
3641
3642 static void __exit fb_console_exit(void)
3643 {
3644 console_lock();
3645 fb_unregister_client(&fbcon_event_notifier);
3646 fbcon_deinit_device();
3647 device_destroy(fb_class, MKDEV(0, 0));
3648 fbcon_exit();
3649 do_unregister_con_driver(&fb_con);
3650 console_unlock();
3651 }
3652
3653 module_exit(fb_console_exit);
3654
3655 #endif
3656
3657 MODULE_LICENSE("GPL");
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