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[mirror_ubuntu-zesty-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 p->con_rotate = initial_rotation;
1097 set_blitting_type(vc, info);
1098
1099 cols = vc->vc_cols;
1100 rows = vc->vc_rows;
1101 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1102 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1103 new_cols /= vc->vc_font.width;
1104 new_rows /= vc->vc_font.height;
1105
1106 /*
1107 * We must always set the mode. The mode of the previous console
1108 * driver could be in the same resolution but we are using different
1109 * hardware so we have to initialize the hardware.
1110 *
1111 * We need to do it in fbcon_init() to prevent screen corruption.
1112 */
1113 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1114 if (info->fbops->fb_set_par &&
1115 !(ops->flags & FBCON_FLAGS_INIT)) {
1116 ret = info->fbops->fb_set_par(info);
1117
1118 if (ret)
1119 printk(KERN_ERR "fbcon_init: detected "
1120 "unhandled fb_set_par error, "
1121 "error code %d\n", ret);
1122 }
1123
1124 ops->flags |= FBCON_FLAGS_INIT;
1125 }
1126
1127 ops->graphics = 0;
1128
1129 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1130 !(cap & FBINFO_HWACCEL_DISABLED))
1131 p->scrollmode = SCROLL_MOVE;
1132 else /* default to something safe */
1133 p->scrollmode = SCROLL_REDRAW;
1134
1135 /*
1136 * ++guenther: console.c:vc_allocate() relies on initializing
1137 * vc_{cols,rows}, but we must not set those if we are only
1138 * resizing the console.
1139 */
1140 if (init) {
1141 vc->vc_cols = new_cols;
1142 vc->vc_rows = new_rows;
1143 } else
1144 vc_resize(vc, new_cols, new_rows);
1145
1146 if (logo)
1147 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1148
1149 if (vc == svc && softback_buf)
1150 fbcon_update_softback(vc);
1151
1152 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1153 ops->rotate = FB_ROTATE_UR;
1154 set_blitting_type(vc, info);
1155 }
1156
1157 ops->p = &fb_display[fg_console];
1158 }
1159
1160 static void fbcon_free_font(struct display *p, bool freefont)
1161 {
1162 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1163 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1164 p->fontdata = NULL;
1165 p->userfont = 0;
1166 }
1167
1168 static void fbcon_deinit(struct vc_data *vc)
1169 {
1170 struct display *p = &fb_display[vc->vc_num];
1171 struct fb_info *info;
1172 struct fbcon_ops *ops;
1173 int idx;
1174 bool free_font = true;
1175
1176 idx = con2fb_map[vc->vc_num];
1177
1178 if (idx == -1)
1179 goto finished;
1180
1181 info = registered_fb[idx];
1182
1183 if (!info)
1184 goto finished;
1185
1186 if (info->flags & FBINFO_MISC_FIRMWARE)
1187 free_font = false;
1188 ops = info->fbcon_par;
1189
1190 if (!ops)
1191 goto finished;
1192
1193 if (CON_IS_VISIBLE(vc))
1194 fbcon_del_cursor_timer(info);
1195
1196 ops->flags &= ~FBCON_FLAGS_INIT;
1197 finished:
1198
1199 fbcon_free_font(p, free_font);
1200 if (free_font)
1201 vc->vc_font.data = NULL;
1202
1203 if (!con_is_bound(&fb_con))
1204 fbcon_exit();
1205
1206 return;
1207 }
1208
1209 /* ====================================================================== */
1210
1211 /* fbcon_XXX routines - interface used by the world
1212 *
1213 * This system is now divided into two levels because of complications
1214 * caused by hardware scrolling. Top level functions:
1215 *
1216 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1217 *
1218 * handles y values in range [0, scr_height-1] that correspond to real
1219 * screen positions. y_wrap shift means that first line of bitmap may be
1220 * anywhere on this display. These functions convert lineoffsets to
1221 * bitmap offsets and deal with the wrap-around case by splitting blits.
1222 *
1223 * fbcon_bmove_physical_8() -- These functions fast implementations
1224 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1225 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1226 *
1227 * WARNING:
1228 *
1229 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1230 * Implies should only really hardware scroll in rows. Only reason for
1231 * restriction is simplicity & efficiency at the moment.
1232 */
1233
1234 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1235 int width)
1236 {
1237 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1238 struct fbcon_ops *ops = info->fbcon_par;
1239
1240 struct display *p = &fb_display[vc->vc_num];
1241 u_int y_break;
1242
1243 if (fbcon_is_inactive(vc, info))
1244 return;
1245
1246 if (!height || !width)
1247 return;
1248
1249 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1250 vc->vc_top = 0;
1251 /*
1252 * If the font dimensions are not an integral of the display
1253 * dimensions then the ops->clear below won't end up clearing
1254 * the margins. Call clear_margins here in case the logo
1255 * bitmap stretched into the margin area.
1256 */
1257 fbcon_clear_margins(vc, 0);
1258 }
1259
1260 /* Split blits that cross physical y_wrap boundary */
1261
1262 y_break = p->vrows - p->yscroll;
1263 if (sy < y_break && sy + height - 1 >= y_break) {
1264 u_int b = y_break - sy;
1265 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267 width);
1268 } else
1269 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270 }
1271
1272 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273 int count, int ypos, int xpos)
1274 {
1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276 struct display *p = &fb_display[vc->vc_num];
1277 struct fbcon_ops *ops = info->fbcon_par;
1278
1279 if (!fbcon_is_inactive(vc, info))
1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281 get_color(vc, info, scr_readw(s), 1),
1282 get_color(vc, info, scr_readw(s), 0));
1283 }
1284
1285 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286 {
1287 unsigned short chr;
1288
1289 scr_writew(c, &chr);
1290 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291 }
1292
1293 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294 {
1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->clear_margins(vc, info, bottom_only);
1300 }
1301
1302 static void fbcon_cursor(struct vc_data *vc, int mode)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1306 int y;
1307 int c = scr_readw((u16 *) vc->vc_pos);
1308
1309 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1310
1311 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1312 return;
1313
1314 if (vc->vc_cursor_type & 0x10)
1315 fbcon_del_cursor_timer(info);
1316 else
1317 fbcon_add_cursor_timer(info);
1318
1319 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1320 if (mode & CM_SOFTBACK) {
1321 mode &= ~CM_SOFTBACK;
1322 y = softback_lines;
1323 } else {
1324 if (softback_lines)
1325 fbcon_set_origin(vc);
1326 y = 0;
1327 }
1328
1329 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1330 get_color(vc, info, c, 0));
1331 }
1332
1333 static int scrollback_phys_max = 0;
1334 static int scrollback_max = 0;
1335 static int scrollback_current = 0;
1336
1337 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1338 int unit)
1339 {
1340 struct display *p, *t;
1341 struct vc_data **default_mode, *vc;
1342 struct vc_data *svc;
1343 struct fbcon_ops *ops = info->fbcon_par;
1344 int rows, cols, charcnt = 256;
1345
1346 p = &fb_display[unit];
1347
1348 if (var_to_display(p, var, info))
1349 return;
1350
1351 vc = vc_cons[unit].d;
1352
1353 if (!vc)
1354 return;
1355
1356 default_mode = vc->vc_display_fg;
1357 svc = *default_mode;
1358 t = &fb_display[svc->vc_num];
1359
1360 if (!vc->vc_font.data) {
1361 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1362 vc->vc_font.width = (*default_mode)->vc_font.width;
1363 vc->vc_font.height = (*default_mode)->vc_font.height;
1364 p->userfont = t->userfont;
1365 if (p->userfont)
1366 REFCOUNT(p->fontdata)++;
1367 }
1368 if (p->userfont)
1369 charcnt = FNTCHARCNT(p->fontdata);
1370
1371 var->activate = FB_ACTIVATE_NOW;
1372 info->var.activate = var->activate;
1373 var->yoffset = info->var.yoffset;
1374 var->xoffset = info->var.xoffset;
1375 fb_set_var(info, var);
1376 ops->var = info->var;
1377 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1378 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1379 if (charcnt == 256) {
1380 vc->vc_hi_font_mask = 0;
1381 } else {
1382 vc->vc_hi_font_mask = 0x100;
1383 if (vc->vc_can_do_color)
1384 vc->vc_complement_mask <<= 1;
1385 }
1386
1387 if (!*svc->vc_uni_pagedir_loc)
1388 con_set_default_unimap(svc);
1389 if (!*vc->vc_uni_pagedir_loc)
1390 con_copy_unimap(vc, svc);
1391
1392 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1393 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1394 cols /= vc->vc_font.width;
1395 rows /= vc->vc_font.height;
1396 vc_resize(vc, cols, rows);
1397
1398 if (CON_IS_VISIBLE(vc)) {
1399 update_screen(vc);
1400 if (softback_buf)
1401 fbcon_update_softback(vc);
1402 }
1403 }
1404
1405 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1406 {
1407 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1408 struct fbcon_ops *ops = info->fbcon_par;
1409 struct display *p = &fb_display[vc->vc_num];
1410
1411 p->yscroll += count;
1412 if (p->yscroll >= p->vrows) /* Deal with wrap */
1413 p->yscroll -= p->vrows;
1414 ops->var.xoffset = 0;
1415 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416 ops->var.vmode |= FB_VMODE_YWRAP;
1417 ops->update_start(info);
1418 scrollback_max += count;
1419 if (scrollback_max > scrollback_phys_max)
1420 scrollback_max = scrollback_phys_max;
1421 scrollback_current = 0;
1422 }
1423
1424 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1425 {
1426 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1427 struct fbcon_ops *ops = info->fbcon_par;
1428 struct display *p = &fb_display[vc->vc_num];
1429
1430 p->yscroll -= count;
1431 if (p->yscroll < 0) /* Deal with wrap */
1432 p->yscroll += p->vrows;
1433 ops->var.xoffset = 0;
1434 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1435 ops->var.vmode |= FB_VMODE_YWRAP;
1436 ops->update_start(info);
1437 scrollback_max -= count;
1438 if (scrollback_max < 0)
1439 scrollback_max = 0;
1440 scrollback_current = 0;
1441 }
1442
1443 static __inline__ void ypan_up(struct vc_data *vc, int count)
1444 {
1445 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1446 struct display *p = &fb_display[vc->vc_num];
1447 struct fbcon_ops *ops = info->fbcon_par;
1448
1449 p->yscroll += count;
1450 if (p->yscroll > p->vrows - vc->vc_rows) {
1451 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1452 0, 0, 0, vc->vc_rows, vc->vc_cols);
1453 p->yscroll -= p->vrows - vc->vc_rows;
1454 }
1455
1456 ops->var.xoffset = 0;
1457 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1458 ops->var.vmode &= ~FB_VMODE_YWRAP;
1459 ops->update_start(info);
1460 fbcon_clear_margins(vc, 1);
1461 scrollback_max += count;
1462 if (scrollback_max > scrollback_phys_max)
1463 scrollback_max = scrollback_phys_max;
1464 scrollback_current = 0;
1465 }
1466
1467 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1468 {
1469 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1470 struct fbcon_ops *ops = info->fbcon_par;
1471 struct display *p = &fb_display[vc->vc_num];
1472
1473 p->yscroll += count;
1474
1475 if (p->yscroll > p->vrows - vc->vc_rows) {
1476 p->yscroll -= p->vrows - vc->vc_rows;
1477 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1478 }
1479
1480 ops->var.xoffset = 0;
1481 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1482 ops->var.vmode &= ~FB_VMODE_YWRAP;
1483 ops->update_start(info);
1484 fbcon_clear_margins(vc, 1);
1485 scrollback_max += count;
1486 if (scrollback_max > scrollback_phys_max)
1487 scrollback_max = scrollback_phys_max;
1488 scrollback_current = 0;
1489 }
1490
1491 static __inline__ void ypan_down(struct vc_data *vc, int count)
1492 {
1493 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1494 struct display *p = &fb_display[vc->vc_num];
1495 struct fbcon_ops *ops = info->fbcon_par;
1496
1497 p->yscroll -= count;
1498 if (p->yscroll < 0) {
1499 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1500 0, vc->vc_rows, vc->vc_cols);
1501 p->yscroll += p->vrows - vc->vc_rows;
1502 }
1503
1504 ops->var.xoffset = 0;
1505 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1506 ops->var.vmode &= ~FB_VMODE_YWRAP;
1507 ops->update_start(info);
1508 fbcon_clear_margins(vc, 1);
1509 scrollback_max -= count;
1510 if (scrollback_max < 0)
1511 scrollback_max = 0;
1512 scrollback_current = 0;
1513 }
1514
1515 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1516 {
1517 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1518 struct fbcon_ops *ops = info->fbcon_par;
1519 struct display *p = &fb_display[vc->vc_num];
1520
1521 p->yscroll -= count;
1522
1523 if (p->yscroll < 0) {
1524 p->yscroll += p->vrows - vc->vc_rows;
1525 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1526 }
1527
1528 ops->var.xoffset = 0;
1529 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1530 ops->var.vmode &= ~FB_VMODE_YWRAP;
1531 ops->update_start(info);
1532 fbcon_clear_margins(vc, 1);
1533 scrollback_max -= count;
1534 if (scrollback_max < 0)
1535 scrollback_max = 0;
1536 scrollback_current = 0;
1537 }
1538
1539 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1540 long delta)
1541 {
1542 int count = vc->vc_rows;
1543 unsigned short *d, *s;
1544 unsigned long n;
1545 int line = 0;
1546
1547 d = (u16 *) softback_curr;
1548 if (d == (u16 *) softback_in)
1549 d = (u16 *) vc->vc_origin;
1550 n = softback_curr + delta * vc->vc_size_row;
1551 softback_lines -= delta;
1552 if (delta < 0) {
1553 if (softback_curr < softback_top && n < softback_buf) {
1554 n += softback_end - softback_buf;
1555 if (n < softback_top) {
1556 softback_lines -=
1557 (softback_top - n) / vc->vc_size_row;
1558 n = softback_top;
1559 }
1560 } else if (softback_curr >= softback_top
1561 && n < softback_top) {
1562 softback_lines -=
1563 (softback_top - n) / vc->vc_size_row;
1564 n = softback_top;
1565 }
1566 } else {
1567 if (softback_curr > softback_in && n >= softback_end) {
1568 n += softback_buf - softback_end;
1569 if (n > softback_in) {
1570 n = softback_in;
1571 softback_lines = 0;
1572 }
1573 } else if (softback_curr <= softback_in && n > softback_in) {
1574 n = softback_in;
1575 softback_lines = 0;
1576 }
1577 }
1578 if (n == softback_curr)
1579 return;
1580 softback_curr = n;
1581 s = (u16 *) softback_curr;
1582 if (s == (u16 *) softback_in)
1583 s = (u16 *) vc->vc_origin;
1584 while (count--) {
1585 unsigned short *start;
1586 unsigned short *le;
1587 unsigned short c;
1588 int x = 0;
1589 unsigned short attr = 1;
1590
1591 start = s;
1592 le = advance_row(s, 1);
1593 do {
1594 c = scr_readw(s);
1595 if (attr != (c & 0xff00)) {
1596 attr = c & 0xff00;
1597 if (s > start) {
1598 fbcon_putcs(vc, start, s - start,
1599 line, x);
1600 x += s - start;
1601 start = s;
1602 }
1603 }
1604 if (c == scr_readw(d)) {
1605 if (s > start) {
1606 fbcon_putcs(vc, start, s - start,
1607 line, x);
1608 x += s - start + 1;
1609 start = s + 1;
1610 } else {
1611 x++;
1612 start++;
1613 }
1614 }
1615 s++;
1616 d++;
1617 } while (s < le);
1618 if (s > start)
1619 fbcon_putcs(vc, start, s - start, line, x);
1620 line++;
1621 if (d == (u16 *) softback_end)
1622 d = (u16 *) softback_buf;
1623 if (d == (u16 *) softback_in)
1624 d = (u16 *) vc->vc_origin;
1625 if (s == (u16 *) softback_end)
1626 s = (u16 *) softback_buf;
1627 if (s == (u16 *) softback_in)
1628 s = (u16 *) vc->vc_origin;
1629 }
1630 }
1631
1632 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1633 int line, int count, int dy)
1634 {
1635 unsigned short *s = (unsigned short *)
1636 (vc->vc_origin + vc->vc_size_row * line);
1637
1638 while (count--) {
1639 unsigned short *start = s;
1640 unsigned short *le = advance_row(s, 1);
1641 unsigned short c;
1642 int x = 0;
1643 unsigned short attr = 1;
1644
1645 do {
1646 c = scr_readw(s);
1647 if (attr != (c & 0xff00)) {
1648 attr = c & 0xff00;
1649 if (s > start) {
1650 fbcon_putcs(vc, start, s - start,
1651 dy, x);
1652 x += s - start;
1653 start = s;
1654 }
1655 }
1656 console_conditional_schedule();
1657 s++;
1658 } while (s < le);
1659 if (s > start)
1660 fbcon_putcs(vc, start, s - start, dy, x);
1661 console_conditional_schedule();
1662 dy++;
1663 }
1664 }
1665
1666 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1667 struct display *p, int line, int count, int ycount)
1668 {
1669 int offset = ycount * vc->vc_cols;
1670 unsigned short *d = (unsigned short *)
1671 (vc->vc_origin + vc->vc_size_row * line);
1672 unsigned short *s = d + offset;
1673 struct fbcon_ops *ops = info->fbcon_par;
1674
1675 while (count--) {
1676 unsigned short *start = s;
1677 unsigned short *le = advance_row(s, 1);
1678 unsigned short c;
1679 int x = 0;
1680
1681 do {
1682 c = scr_readw(s);
1683
1684 if (c == scr_readw(d)) {
1685 if (s > start) {
1686 ops->bmove(vc, info, line + ycount, x,
1687 line, x, 1, s-start);
1688 x += s - start + 1;
1689 start = s + 1;
1690 } else {
1691 x++;
1692 start++;
1693 }
1694 }
1695
1696 scr_writew(c, d);
1697 console_conditional_schedule();
1698 s++;
1699 d++;
1700 } while (s < le);
1701 if (s > start)
1702 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1703 s-start);
1704 console_conditional_schedule();
1705 if (ycount > 0)
1706 line++;
1707 else {
1708 line--;
1709 /* NOTE: We subtract two lines from these pointers */
1710 s -= vc->vc_size_row;
1711 d -= vc->vc_size_row;
1712 }
1713 }
1714 }
1715
1716 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1717 int line, int count, int offset)
1718 {
1719 unsigned short *d = (unsigned short *)
1720 (vc->vc_origin + vc->vc_size_row * line);
1721 unsigned short *s = d + offset;
1722
1723 while (count--) {
1724 unsigned short *start = s;
1725 unsigned short *le = advance_row(s, 1);
1726 unsigned short c;
1727 int x = 0;
1728 unsigned short attr = 1;
1729
1730 do {
1731 c = scr_readw(s);
1732 if (attr != (c & 0xff00)) {
1733 attr = c & 0xff00;
1734 if (s > start) {
1735 fbcon_putcs(vc, start, s - start,
1736 line, x);
1737 x += s - start;
1738 start = s;
1739 }
1740 }
1741 if (c == scr_readw(d)) {
1742 if (s > start) {
1743 fbcon_putcs(vc, start, s - start,
1744 line, x);
1745 x += s - start + 1;
1746 start = s + 1;
1747 } else {
1748 x++;
1749 start++;
1750 }
1751 }
1752 scr_writew(c, d);
1753 console_conditional_schedule();
1754 s++;
1755 d++;
1756 } while (s < le);
1757 if (s > start)
1758 fbcon_putcs(vc, start, s - start, line, x);
1759 console_conditional_schedule();
1760 if (offset > 0)
1761 line++;
1762 else {
1763 line--;
1764 /* NOTE: We subtract two lines from these pointers */
1765 s -= vc->vc_size_row;
1766 d -= vc->vc_size_row;
1767 }
1768 }
1769 }
1770
1771 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1772 int count)
1773 {
1774 unsigned short *p;
1775
1776 if (vc->vc_num != fg_console)
1777 return;
1778 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1779
1780 while (count) {
1781 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1782 count--;
1783 p = advance_row(p, 1);
1784 softback_in += vc->vc_size_row;
1785 if (softback_in == softback_end)
1786 softback_in = softback_buf;
1787 if (softback_in == softback_top) {
1788 softback_top += vc->vc_size_row;
1789 if (softback_top == softback_end)
1790 softback_top = softback_buf;
1791 }
1792 }
1793 softback_curr = softback_in;
1794 }
1795
1796 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1797 int count)
1798 {
1799 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1800 struct display *p = &fb_display[vc->vc_num];
1801 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1802
1803 if (fbcon_is_inactive(vc, info))
1804 return -EINVAL;
1805
1806 fbcon_cursor(vc, CM_ERASE);
1807
1808 /*
1809 * ++Geert: Only use ywrap/ypan if the console is in text mode
1810 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1811 * whole screen (prevents flicker).
1812 */
1813
1814 switch (dir) {
1815 case SM_UP:
1816 if (count > vc->vc_rows) /* Maximum realistic size */
1817 count = vc->vc_rows;
1818 if (softback_top)
1819 fbcon_softback_note(vc, t, count);
1820 if (logo_shown >= 0)
1821 goto redraw_up;
1822 switch (p->scrollmode) {
1823 case SCROLL_MOVE:
1824 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1825 count);
1826 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1827 scr_memsetw((unsigned short *) (vc->vc_origin +
1828 vc->vc_size_row *
1829 (b - count)),
1830 vc->vc_video_erase_char,
1831 vc->vc_size_row * count);
1832 return 1;
1833 break;
1834
1835 case SCROLL_WRAP_MOVE:
1836 if (b - t - count > 3 * vc->vc_rows >> 2) {
1837 if (t > 0)
1838 fbcon_bmove(vc, 0, 0, count, 0, t,
1839 vc->vc_cols);
1840 ywrap_up(vc, count);
1841 if (vc->vc_rows - b > 0)
1842 fbcon_bmove(vc, b - count, 0, b, 0,
1843 vc->vc_rows - b,
1844 vc->vc_cols);
1845 } else if (info->flags & FBINFO_READS_FAST)
1846 fbcon_bmove(vc, t + count, 0, t, 0,
1847 b - t - count, vc->vc_cols);
1848 else
1849 goto redraw_up;
1850 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1851 break;
1852
1853 case SCROLL_PAN_REDRAW:
1854 if ((p->yscroll + count <=
1855 2 * (p->vrows - vc->vc_rows))
1856 && ((!scroll_partial && (b - t == vc->vc_rows))
1857 || (scroll_partial
1858 && (b - t - count >
1859 3 * vc->vc_rows >> 2)))) {
1860 if (t > 0)
1861 fbcon_redraw_move(vc, p, 0, t, count);
1862 ypan_up_redraw(vc, t, count);
1863 if (vc->vc_rows - b > 0)
1864 fbcon_redraw_move(vc, p, b,
1865 vc->vc_rows - b, b);
1866 } else
1867 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1868 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1869 break;
1870
1871 case SCROLL_PAN_MOVE:
1872 if ((p->yscroll + count <=
1873 2 * (p->vrows - vc->vc_rows))
1874 && ((!scroll_partial && (b - t == vc->vc_rows))
1875 || (scroll_partial
1876 && (b - t - count >
1877 3 * vc->vc_rows >> 2)))) {
1878 if (t > 0)
1879 fbcon_bmove(vc, 0, 0, count, 0, t,
1880 vc->vc_cols);
1881 ypan_up(vc, count);
1882 if (vc->vc_rows - b > 0)
1883 fbcon_bmove(vc, b - count, 0, b, 0,
1884 vc->vc_rows - b,
1885 vc->vc_cols);
1886 } else if (info->flags & FBINFO_READS_FAST)
1887 fbcon_bmove(vc, t + count, 0, t, 0,
1888 b - t - count, vc->vc_cols);
1889 else
1890 goto redraw_up;
1891 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1892 break;
1893
1894 case SCROLL_REDRAW:
1895 redraw_up:
1896 fbcon_redraw(vc, p, t, b - t - count,
1897 count * vc->vc_cols);
1898 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1899 scr_memsetw((unsigned short *) (vc->vc_origin +
1900 vc->vc_size_row *
1901 (b - count)),
1902 vc->vc_video_erase_char,
1903 vc->vc_size_row * count);
1904 return 1;
1905 }
1906 break;
1907
1908 case SM_DOWN:
1909 if (count > vc->vc_rows) /* Maximum realistic size */
1910 count = vc->vc_rows;
1911 if (logo_shown >= 0)
1912 goto redraw_down;
1913 switch (p->scrollmode) {
1914 case SCROLL_MOVE:
1915 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1916 -count);
1917 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1918 scr_memsetw((unsigned short *) (vc->vc_origin +
1919 vc->vc_size_row *
1920 t),
1921 vc->vc_video_erase_char,
1922 vc->vc_size_row * count);
1923 return 1;
1924 break;
1925
1926 case SCROLL_WRAP_MOVE:
1927 if (b - t - count > 3 * vc->vc_rows >> 2) {
1928 if (vc->vc_rows - b > 0)
1929 fbcon_bmove(vc, b, 0, b - count, 0,
1930 vc->vc_rows - b,
1931 vc->vc_cols);
1932 ywrap_down(vc, count);
1933 if (t > 0)
1934 fbcon_bmove(vc, count, 0, 0, 0, t,
1935 vc->vc_cols);
1936 } else if (info->flags & FBINFO_READS_FAST)
1937 fbcon_bmove(vc, t, 0, t + count, 0,
1938 b - t - count, vc->vc_cols);
1939 else
1940 goto redraw_down;
1941 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1942 break;
1943
1944 case SCROLL_PAN_MOVE:
1945 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1946 && ((!scroll_partial && (b - t == vc->vc_rows))
1947 || (scroll_partial
1948 && (b - t - count >
1949 3 * vc->vc_rows >> 2)))) {
1950 if (vc->vc_rows - b > 0)
1951 fbcon_bmove(vc, b, 0, b - count, 0,
1952 vc->vc_rows - b,
1953 vc->vc_cols);
1954 ypan_down(vc, count);
1955 if (t > 0)
1956 fbcon_bmove(vc, count, 0, 0, 0, t,
1957 vc->vc_cols);
1958 } else if (info->flags & FBINFO_READS_FAST)
1959 fbcon_bmove(vc, t, 0, t + count, 0,
1960 b - t - count, vc->vc_cols);
1961 else
1962 goto redraw_down;
1963 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1964 break;
1965
1966 case SCROLL_PAN_REDRAW:
1967 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1968 && ((!scroll_partial && (b - t == vc->vc_rows))
1969 || (scroll_partial
1970 && (b - t - count >
1971 3 * vc->vc_rows >> 2)))) {
1972 if (vc->vc_rows - b > 0)
1973 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1974 b - count);
1975 ypan_down_redraw(vc, t, count);
1976 if (t > 0)
1977 fbcon_redraw_move(vc, p, count, t, 0);
1978 } else
1979 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1980 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1981 break;
1982
1983 case SCROLL_REDRAW:
1984 redraw_down:
1985 fbcon_redraw(vc, p, b - 1, b - t - count,
1986 -count * vc->vc_cols);
1987 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1988 scr_memsetw((unsigned short *) (vc->vc_origin +
1989 vc->vc_size_row *
1990 t),
1991 vc->vc_video_erase_char,
1992 vc->vc_size_row * count);
1993 return 1;
1994 }
1995 }
1996 return 0;
1997 }
1998
1999
2000 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2001 int height, int width)
2002 {
2003 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2004 struct display *p = &fb_display[vc->vc_num];
2005
2006 if (fbcon_is_inactive(vc, info))
2007 return;
2008
2009 if (!width || !height)
2010 return;
2011
2012 /* Split blits that cross physical y_wrap case.
2013 * Pathological case involves 4 blits, better to use recursive
2014 * code rather than unrolled case
2015 *
2016 * Recursive invocations don't need to erase the cursor over and
2017 * over again, so we use fbcon_bmove_rec()
2018 */
2019 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2020 p->vrows - p->yscroll);
2021 }
2022
2023 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2024 int dy, int dx, int height, int width, u_int y_break)
2025 {
2026 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2027 struct fbcon_ops *ops = info->fbcon_par;
2028 u_int b;
2029
2030 if (sy < y_break && sy + height > y_break) {
2031 b = y_break - sy;
2032 if (dy < sy) { /* Avoid trashing self */
2033 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2034 y_break);
2035 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2036 height - b, width, y_break);
2037 } else {
2038 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2039 height - b, width, y_break);
2040 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2041 y_break);
2042 }
2043 return;
2044 }
2045
2046 if (dy < y_break && dy + height > y_break) {
2047 b = y_break - dy;
2048 if (dy < sy) { /* Avoid trashing self */
2049 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2050 y_break);
2051 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2052 height - b, width, y_break);
2053 } else {
2054 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2055 height - b, width, y_break);
2056 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2057 y_break);
2058 }
2059 return;
2060 }
2061 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2062 height, width);
2063 }
2064
2065 static void updatescrollmode(struct display *p,
2066 struct fb_info *info,
2067 struct vc_data *vc)
2068 {
2069 struct fbcon_ops *ops = info->fbcon_par;
2070 int fh = vc->vc_font.height;
2071 int cap = info->flags;
2072 u16 t = 0;
2073 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2074 info->fix.xpanstep);
2075 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2076 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2077 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2078 info->var.xres_virtual);
2079 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2080 divides(ypan, vc->vc_font.height) && vyres > yres;
2081 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2082 divides(ywrap, vc->vc_font.height) &&
2083 divides(vc->vc_font.height, vyres) &&
2084 divides(vc->vc_font.height, yres);
2085 int reading_fast = cap & FBINFO_READS_FAST;
2086 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2087 !(cap & FBINFO_HWACCEL_DISABLED);
2088 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2089 !(cap & FBINFO_HWACCEL_DISABLED);
2090
2091 p->vrows = vyres/fh;
2092 if (yres > (fh * (vc->vc_rows + 1)))
2093 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2094 if ((yres % fh) && (vyres % fh < yres % fh))
2095 p->vrows--;
2096
2097 if (good_wrap || good_pan) {
2098 if (reading_fast || fast_copyarea)
2099 p->scrollmode = good_wrap ?
2100 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2101 else
2102 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2103 SCROLL_PAN_REDRAW;
2104 } else {
2105 if (reading_fast || (fast_copyarea && !fast_imageblit))
2106 p->scrollmode = SCROLL_MOVE;
2107 else
2108 p->scrollmode = SCROLL_REDRAW;
2109 }
2110 }
2111
2112 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2113 unsigned int height, unsigned int user)
2114 {
2115 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2116 struct fbcon_ops *ops = info->fbcon_par;
2117 struct display *p = &fb_display[vc->vc_num];
2118 struct fb_var_screeninfo var = info->var;
2119 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2120
2121 virt_w = FBCON_SWAP(ops->rotate, width, height);
2122 virt_h = FBCON_SWAP(ops->rotate, height, width);
2123 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2124 vc->vc_font.height);
2125 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2126 vc->vc_font.width);
2127 var.xres = virt_w * virt_fw;
2128 var.yres = virt_h * virt_fh;
2129 x_diff = info->var.xres - var.xres;
2130 y_diff = info->var.yres - var.yres;
2131 if (x_diff < 0 || x_diff > virt_fw ||
2132 y_diff < 0 || y_diff > virt_fh) {
2133 const struct fb_videomode *mode;
2134
2135 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2136 mode = fb_find_best_mode(&var, &info->modelist);
2137 if (mode == NULL)
2138 return -EINVAL;
2139 display_to_var(&var, p);
2140 fb_videomode_to_var(&var, mode);
2141
2142 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2143 return -EINVAL;
2144
2145 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2146 if (CON_IS_VISIBLE(vc)) {
2147 var.activate = FB_ACTIVATE_NOW |
2148 FB_ACTIVATE_FORCE;
2149 fb_set_var(info, &var);
2150 }
2151 var_to_display(p, &info->var, info);
2152 ops->var = info->var;
2153 }
2154 updatescrollmode(p, info, vc);
2155 return 0;
2156 }
2157
2158 static int fbcon_switch(struct vc_data *vc)
2159 {
2160 struct fb_info *info, *old_info = NULL;
2161 struct fbcon_ops *ops;
2162 struct display *p = &fb_display[vc->vc_num];
2163 struct fb_var_screeninfo var;
2164 int i, ret, prev_console, charcnt = 256;
2165
2166 info = registered_fb[con2fb_map[vc->vc_num]];
2167 ops = info->fbcon_par;
2168
2169 if (softback_top) {
2170 if (softback_lines)
2171 fbcon_set_origin(vc);
2172 softback_top = softback_curr = softback_in = softback_buf;
2173 softback_lines = 0;
2174 fbcon_update_softback(vc);
2175 }
2176
2177 if (logo_shown >= 0) {
2178 struct vc_data *conp2 = vc_cons[logo_shown].d;
2179
2180 if (conp2->vc_top == logo_lines
2181 && conp2->vc_bottom == conp2->vc_rows)
2182 conp2->vc_top = 0;
2183 logo_shown = FBCON_LOGO_CANSHOW;
2184 }
2185
2186 prev_console = ops->currcon;
2187 if (prev_console != -1)
2188 old_info = registered_fb[con2fb_map[prev_console]];
2189 /*
2190 * FIXME: If we have multiple fbdev's loaded, we need to
2191 * update all info->currcon. Perhaps, we can place this
2192 * in a centralized structure, but this might break some
2193 * drivers.
2194 *
2195 * info->currcon = vc->vc_num;
2196 */
2197 for (i = 0; i < FB_MAX; i++) {
2198 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2199 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2200
2201 o->currcon = vc->vc_num;
2202 }
2203 }
2204 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2205 display_to_var(&var, p);
2206 var.activate = FB_ACTIVATE_NOW;
2207
2208 /*
2209 * make sure we don't unnecessarily trip the memcmp()
2210 * in fb_set_var()
2211 */
2212 info->var.activate = var.activate;
2213 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2214 fb_set_var(info, &var);
2215 ops->var = info->var;
2216
2217 if (old_info != NULL && (old_info != info ||
2218 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2219 if (info->fbops->fb_set_par) {
2220 ret = info->fbops->fb_set_par(info);
2221
2222 if (ret)
2223 printk(KERN_ERR "fbcon_switch: detected "
2224 "unhandled fb_set_par error, "
2225 "error code %d\n", ret);
2226 }
2227
2228 if (old_info != info)
2229 fbcon_del_cursor_timer(old_info);
2230 }
2231
2232 if (fbcon_is_inactive(vc, info) ||
2233 ops->blank_state != FB_BLANK_UNBLANK)
2234 fbcon_del_cursor_timer(info);
2235 else
2236 fbcon_add_cursor_timer(info);
2237
2238 set_blitting_type(vc, info);
2239 ops->cursor_reset = 1;
2240
2241 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2242 ops->rotate = FB_ROTATE_UR;
2243 set_blitting_type(vc, info);
2244 }
2245
2246 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2247 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2248
2249 if (p->userfont)
2250 charcnt = FNTCHARCNT(vc->vc_font.data);
2251
2252 if (charcnt > 256)
2253 vc->vc_complement_mask <<= 1;
2254
2255 updatescrollmode(p, info, vc);
2256
2257 switch (p->scrollmode) {
2258 case SCROLL_WRAP_MOVE:
2259 scrollback_phys_max = p->vrows - vc->vc_rows;
2260 break;
2261 case SCROLL_PAN_MOVE:
2262 case SCROLL_PAN_REDRAW:
2263 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2264 if (scrollback_phys_max < 0)
2265 scrollback_phys_max = 0;
2266 break;
2267 default:
2268 scrollback_phys_max = 0;
2269 break;
2270 }
2271
2272 scrollback_max = 0;
2273 scrollback_current = 0;
2274
2275 if (!fbcon_is_inactive(vc, info)) {
2276 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2277 ops->update_start(info);
2278 }
2279
2280 fbcon_set_palette(vc, color_table);
2281 fbcon_clear_margins(vc, 0);
2282
2283 if (logo_shown == FBCON_LOGO_DRAW) {
2284
2285 logo_shown = fg_console;
2286 /* This is protected above by initmem_freed */
2287 fb_show_logo(info, ops->rotate);
2288 update_region(vc,
2289 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2290 vc->vc_size_row * (vc->vc_bottom -
2291 vc->vc_top) / 2);
2292 return 0;
2293 }
2294 return 1;
2295 }
2296
2297 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2298 int blank)
2299 {
2300 struct fb_event event;
2301
2302 if (blank) {
2303 unsigned short charmask = vc->vc_hi_font_mask ?
2304 0x1ff : 0xff;
2305 unsigned short oldc;
2306
2307 oldc = vc->vc_video_erase_char;
2308 vc->vc_video_erase_char &= charmask;
2309 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2310 vc->vc_video_erase_char = oldc;
2311 }
2312
2313
2314 if (!lock_fb_info(info))
2315 return;
2316 event.info = info;
2317 event.data = &blank;
2318 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2319 unlock_fb_info(info);
2320 }
2321
2322 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2323 {
2324 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2325 struct fbcon_ops *ops = info->fbcon_par;
2326
2327 if (mode_switch) {
2328 struct fb_var_screeninfo var = info->var;
2329
2330 ops->graphics = 1;
2331
2332 if (!blank) {
2333 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2334 fb_set_var(info, &var);
2335 ops->graphics = 0;
2336 ops->var = info->var;
2337 }
2338 }
2339
2340 if (!fbcon_is_inactive(vc, info)) {
2341 if (ops->blank_state != blank) {
2342 ops->blank_state = blank;
2343 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2344 ops->cursor_flash = (!blank);
2345
2346 if (!(info->flags & FBINFO_MISC_USEREVENT))
2347 if (fb_blank(info, blank))
2348 fbcon_generic_blank(vc, info, blank);
2349 }
2350
2351 if (!blank)
2352 update_screen(vc);
2353 }
2354
2355 if (mode_switch || fbcon_is_inactive(vc, info) ||
2356 ops->blank_state != FB_BLANK_UNBLANK)
2357 fbcon_del_cursor_timer(info);
2358 else
2359 fbcon_add_cursor_timer(info);
2360
2361 return 0;
2362 }
2363
2364 static int fbcon_debug_enter(struct vc_data *vc)
2365 {
2366 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2367 struct fbcon_ops *ops = info->fbcon_par;
2368
2369 ops->save_graphics = ops->graphics;
2370 ops->graphics = 0;
2371 if (info->fbops->fb_debug_enter)
2372 info->fbops->fb_debug_enter(info);
2373 fbcon_set_palette(vc, color_table);
2374 return 0;
2375 }
2376
2377 static int fbcon_debug_leave(struct vc_data *vc)
2378 {
2379 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2380 struct fbcon_ops *ops = info->fbcon_par;
2381
2382 ops->graphics = ops->save_graphics;
2383 if (info->fbops->fb_debug_leave)
2384 info->fbops->fb_debug_leave(info);
2385 return 0;
2386 }
2387
2388 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2389 {
2390 u8 *fontdata = vc->vc_font.data;
2391 u8 *data = font->data;
2392 int i, j;
2393
2394 font->width = vc->vc_font.width;
2395 font->height = vc->vc_font.height;
2396 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2397 if (!font->data)
2398 return 0;
2399
2400 if (font->width <= 8) {
2401 j = vc->vc_font.height;
2402 for (i = 0; i < font->charcount; i++) {
2403 memcpy(data, fontdata, j);
2404 memset(data + j, 0, 32 - j);
2405 data += 32;
2406 fontdata += j;
2407 }
2408 } else if (font->width <= 16) {
2409 j = vc->vc_font.height * 2;
2410 for (i = 0; i < font->charcount; i++) {
2411 memcpy(data, fontdata, j);
2412 memset(data + j, 0, 64 - j);
2413 data += 64;
2414 fontdata += j;
2415 }
2416 } else if (font->width <= 24) {
2417 for (i = 0; i < font->charcount; i++) {
2418 for (j = 0; j < vc->vc_font.height; j++) {
2419 *data++ = fontdata[0];
2420 *data++ = fontdata[1];
2421 *data++ = fontdata[2];
2422 fontdata += sizeof(u32);
2423 }
2424 memset(data, 0, 3 * (32 - j));
2425 data += 3 * (32 - j);
2426 }
2427 } else {
2428 j = vc->vc_font.height * 4;
2429 for (i = 0; i < font->charcount; i++) {
2430 memcpy(data, fontdata, j);
2431 memset(data + j, 0, 128 - j);
2432 data += 128;
2433 fontdata += j;
2434 }
2435 }
2436 return 0;
2437 }
2438
2439 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2440 const u8 * data, int userfont)
2441 {
2442 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2443 struct fbcon_ops *ops = info->fbcon_par;
2444 struct display *p = &fb_display[vc->vc_num];
2445 int resize;
2446 int cnt;
2447 char *old_data = NULL;
2448
2449 if (CON_IS_VISIBLE(vc) && softback_lines)
2450 fbcon_set_origin(vc);
2451
2452 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2453 if (p->userfont)
2454 old_data = vc->vc_font.data;
2455 if (userfont)
2456 cnt = FNTCHARCNT(data);
2457 else
2458 cnt = 256;
2459 vc->vc_font.data = (void *)(p->fontdata = data);
2460 if ((p->userfont = userfont))
2461 REFCOUNT(data)++;
2462 vc->vc_font.width = w;
2463 vc->vc_font.height = h;
2464 if (vc->vc_hi_font_mask && cnt == 256) {
2465 vc->vc_hi_font_mask = 0;
2466 if (vc->vc_can_do_color) {
2467 vc->vc_complement_mask >>= 1;
2468 vc->vc_s_complement_mask >>= 1;
2469 }
2470
2471 /* ++Edmund: reorder the attribute bits */
2472 if (vc->vc_can_do_color) {
2473 unsigned short *cp =
2474 (unsigned short *) vc->vc_origin;
2475 int count = vc->vc_screenbuf_size / 2;
2476 unsigned short c;
2477 for (; count > 0; count--, cp++) {
2478 c = scr_readw(cp);
2479 scr_writew(((c & 0xfe00) >> 1) |
2480 (c & 0xff), cp);
2481 }
2482 c = vc->vc_video_erase_char;
2483 vc->vc_video_erase_char =
2484 ((c & 0xfe00) >> 1) | (c & 0xff);
2485 vc->vc_attr >>= 1;
2486 }
2487 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2488 vc->vc_hi_font_mask = 0x100;
2489 if (vc->vc_can_do_color) {
2490 vc->vc_complement_mask <<= 1;
2491 vc->vc_s_complement_mask <<= 1;
2492 }
2493
2494 /* ++Edmund: reorder the attribute bits */
2495 {
2496 unsigned short *cp =
2497 (unsigned short *) vc->vc_origin;
2498 int count = vc->vc_screenbuf_size / 2;
2499 unsigned short c;
2500 for (; count > 0; count--, cp++) {
2501 unsigned short newc;
2502 c = scr_readw(cp);
2503 if (vc->vc_can_do_color)
2504 newc =
2505 ((c & 0xff00) << 1) | (c &
2506 0xff);
2507 else
2508 newc = c & ~0x100;
2509 scr_writew(newc, cp);
2510 }
2511 c = vc->vc_video_erase_char;
2512 if (vc->vc_can_do_color) {
2513 vc->vc_video_erase_char =
2514 ((c & 0xff00) << 1) | (c & 0xff);
2515 vc->vc_attr <<= 1;
2516 } else
2517 vc->vc_video_erase_char = c & ~0x100;
2518 }
2519
2520 }
2521
2522 if (resize) {
2523 int cols, rows;
2524
2525 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2526 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2527 cols /= w;
2528 rows /= h;
2529 vc_resize(vc, cols, rows);
2530 if (CON_IS_VISIBLE(vc) && softback_buf)
2531 fbcon_update_softback(vc);
2532 } else if (CON_IS_VISIBLE(vc)
2533 && vc->vc_mode == KD_TEXT) {
2534 fbcon_clear_margins(vc, 0);
2535 update_screen(vc);
2536 }
2537
2538 if (old_data && (--REFCOUNT(old_data) == 0))
2539 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2540 return 0;
2541 }
2542
2543 static int fbcon_copy_font(struct vc_data *vc, int con)
2544 {
2545 struct display *od = &fb_display[con];
2546 struct console_font *f = &vc->vc_font;
2547
2548 if (od->fontdata == f->data)
2549 return 0; /* already the same font... */
2550 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2551 }
2552
2553 /*
2554 * User asked to set font; we are guaranteed that
2555 * a) width and height are in range 1..32
2556 * b) charcount does not exceed 512
2557 * but lets not assume that, since someone might someday want to use larger
2558 * fonts. And charcount of 512 is small for unicode support.
2559 *
2560 * However, user space gives the font in 32 rows , regardless of
2561 * actual font height. So a new API is needed if support for larger fonts
2562 * is ever implemented.
2563 */
2564
2565 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2566 {
2567 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2568 unsigned charcount = font->charcount;
2569 int w = font->width;
2570 int h = font->height;
2571 int size;
2572 int i, csum;
2573 u8 *new_data, *data = font->data;
2574 int pitch = (font->width+7) >> 3;
2575
2576 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2577 * If not this check should be changed to charcount < 256 */
2578 if (charcount != 256 && charcount != 512)
2579 return -EINVAL;
2580
2581 /* Make sure drawing engine can handle the font */
2582 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2583 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2584 return -EINVAL;
2585
2586 /* Make sure driver can handle the font length */
2587 if (fbcon_invalid_charcount(info, charcount))
2588 return -EINVAL;
2589
2590 size = h * pitch * charcount;
2591
2592 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2593
2594 if (!new_data)
2595 return -ENOMEM;
2596
2597 new_data += FONT_EXTRA_WORDS * sizeof(int);
2598 FNTSIZE(new_data) = size;
2599 FNTCHARCNT(new_data) = charcount;
2600 REFCOUNT(new_data) = 0; /* usage counter */
2601 for (i=0; i< charcount; i++) {
2602 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2603 }
2604
2605 /* Since linux has a nice crc32 function use it for counting font
2606 * checksums. */
2607 csum = crc32(0, new_data, size);
2608
2609 FNTSUM(new_data) = csum;
2610 /* Check if the same font is on some other console already */
2611 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2612 struct vc_data *tmp = vc_cons[i].d;
2613
2614 if (fb_display[i].userfont &&
2615 fb_display[i].fontdata &&
2616 FNTSUM(fb_display[i].fontdata) == csum &&
2617 FNTSIZE(fb_display[i].fontdata) == size &&
2618 tmp->vc_font.width == w &&
2619 !memcmp(fb_display[i].fontdata, new_data, size)) {
2620 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2621 new_data = (u8 *)fb_display[i].fontdata;
2622 break;
2623 }
2624 }
2625 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2626 }
2627
2628 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2629 {
2630 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2631 const struct font_desc *f;
2632
2633 if (!name)
2634 f = get_default_font(info->var.xres, info->var.yres,
2635 info->pixmap.blit_x, info->pixmap.blit_y);
2636 else if (!(f = find_font(name)))
2637 return -ENOENT;
2638
2639 font->width = f->width;
2640 font->height = f->height;
2641 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2642 }
2643
2644 static u16 palette_red[16];
2645 static u16 palette_green[16];
2646 static u16 palette_blue[16];
2647
2648 static struct fb_cmap palette_cmap = {
2649 0, 16, palette_red, palette_green, palette_blue, NULL
2650 };
2651
2652 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2653 {
2654 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2655 int i, j, k, depth;
2656 u8 val;
2657
2658 if (fbcon_is_inactive(vc, info))
2659 return -EINVAL;
2660
2661 if (!CON_IS_VISIBLE(vc))
2662 return 0;
2663
2664 depth = fb_get_color_depth(&info->var, &info->fix);
2665 if (depth > 3) {
2666 for (i = j = 0; i < 16; i++) {
2667 k = table[i];
2668 val = vc->vc_palette[j++];
2669 palette_red[k] = (val << 8) | val;
2670 val = vc->vc_palette[j++];
2671 palette_green[k] = (val << 8) | val;
2672 val = vc->vc_palette[j++];
2673 palette_blue[k] = (val << 8) | val;
2674 }
2675 palette_cmap.len = 16;
2676 palette_cmap.start = 0;
2677 /*
2678 * If framebuffer is capable of less than 16 colors,
2679 * use default palette of fbcon.
2680 */
2681 } else
2682 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2683
2684 return fb_set_cmap(&palette_cmap, info);
2685 }
2686
2687 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2688 {
2689 unsigned long p;
2690 int line;
2691
2692 if (vc->vc_num != fg_console || !softback_lines)
2693 return (u16 *) (vc->vc_origin + offset);
2694 line = offset / vc->vc_size_row;
2695 if (line >= softback_lines)
2696 return (u16 *) (vc->vc_origin + offset -
2697 softback_lines * vc->vc_size_row);
2698 p = softback_curr + offset;
2699 if (p >= softback_end)
2700 p += softback_buf - softback_end;
2701 return (u16 *) p;
2702 }
2703
2704 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2705 int *px, int *py)
2706 {
2707 unsigned long ret;
2708 int x, y;
2709
2710 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2711 unsigned long offset = (pos - vc->vc_origin) / 2;
2712
2713 x = offset % vc->vc_cols;
2714 y = offset / vc->vc_cols;
2715 if (vc->vc_num == fg_console)
2716 y += softback_lines;
2717 ret = pos + (vc->vc_cols - x) * 2;
2718 } else if (vc->vc_num == fg_console && softback_lines) {
2719 unsigned long offset = pos - softback_curr;
2720
2721 if (pos < softback_curr)
2722 offset += softback_end - softback_buf;
2723 offset /= 2;
2724 x = offset % vc->vc_cols;
2725 y = offset / vc->vc_cols;
2726 ret = pos + (vc->vc_cols - x) * 2;
2727 if (ret == softback_end)
2728 ret = softback_buf;
2729 if (ret == softback_in)
2730 ret = vc->vc_origin;
2731 } else {
2732 /* Should not happen */
2733 x = y = 0;
2734 ret = vc->vc_origin;
2735 }
2736 if (px)
2737 *px = x;
2738 if (py)
2739 *py = y;
2740 return ret;
2741 }
2742
2743 /* As we might be inside of softback, we may work with non-contiguous buffer,
2744 that's why we have to use a separate routine. */
2745 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2746 {
2747 while (cnt--) {
2748 u16 a = scr_readw(p);
2749 if (!vc->vc_can_do_color)
2750 a ^= 0x0800;
2751 else if (vc->vc_hi_font_mask == 0x100)
2752 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2753 (((a) & 0x0e00) << 4);
2754 else
2755 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2756 (((a) & 0x0700) << 4);
2757 scr_writew(a, p++);
2758 if (p == (u16 *) softback_end)
2759 p = (u16 *) softback_buf;
2760 if (p == (u16 *) softback_in)
2761 p = (u16 *) vc->vc_origin;
2762 }
2763 }
2764
2765 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2766 {
2767 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2768 struct fbcon_ops *ops = info->fbcon_par;
2769 struct display *disp = &fb_display[fg_console];
2770 int offset, limit, scrollback_old;
2771
2772 if (softback_top) {
2773 if (vc->vc_num != fg_console)
2774 return 0;
2775 if (vc->vc_mode != KD_TEXT || !lines)
2776 return 0;
2777 if (logo_shown >= 0) {
2778 struct vc_data *conp2 = vc_cons[logo_shown].d;
2779
2780 if (conp2->vc_top == logo_lines
2781 && conp2->vc_bottom == conp2->vc_rows)
2782 conp2->vc_top = 0;
2783 if (logo_shown == vc->vc_num) {
2784 unsigned long p, q;
2785 int i;
2786
2787 p = softback_in;
2788 q = vc->vc_origin +
2789 logo_lines * vc->vc_size_row;
2790 for (i = 0; i < logo_lines; i++) {
2791 if (p == softback_top)
2792 break;
2793 if (p == softback_buf)
2794 p = softback_end;
2795 p -= vc->vc_size_row;
2796 q -= vc->vc_size_row;
2797 scr_memcpyw((u16 *) q, (u16 *) p,
2798 vc->vc_size_row);
2799 }
2800 softback_in = softback_curr = p;
2801 update_region(vc, vc->vc_origin,
2802 logo_lines * vc->vc_cols);
2803 }
2804 logo_shown = FBCON_LOGO_CANSHOW;
2805 }
2806 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2807 fbcon_redraw_softback(vc, disp, lines);
2808 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2809 return 0;
2810 }
2811
2812 if (!scrollback_phys_max)
2813 return -ENOSYS;
2814
2815 scrollback_old = scrollback_current;
2816 scrollback_current -= lines;
2817 if (scrollback_current < 0)
2818 scrollback_current = 0;
2819 else if (scrollback_current > scrollback_max)
2820 scrollback_current = scrollback_max;
2821 if (scrollback_current == scrollback_old)
2822 return 0;
2823
2824 if (fbcon_is_inactive(vc, info))
2825 return 0;
2826
2827 fbcon_cursor(vc, CM_ERASE);
2828
2829 offset = disp->yscroll - scrollback_current;
2830 limit = disp->vrows;
2831 switch (disp->scrollmode) {
2832 case SCROLL_WRAP_MOVE:
2833 info->var.vmode |= FB_VMODE_YWRAP;
2834 break;
2835 case SCROLL_PAN_MOVE:
2836 case SCROLL_PAN_REDRAW:
2837 limit -= vc->vc_rows;
2838 info->var.vmode &= ~FB_VMODE_YWRAP;
2839 break;
2840 }
2841 if (offset < 0)
2842 offset += limit;
2843 else if (offset >= limit)
2844 offset -= limit;
2845
2846 ops->var.xoffset = 0;
2847 ops->var.yoffset = offset * vc->vc_font.height;
2848 ops->update_start(info);
2849
2850 if (!scrollback_current)
2851 fbcon_cursor(vc, CM_DRAW);
2852 return 0;
2853 }
2854
2855 static int fbcon_set_origin(struct vc_data *vc)
2856 {
2857 if (softback_lines)
2858 fbcon_scrolldelta(vc, softback_lines);
2859 return 0;
2860 }
2861
2862 static void fbcon_suspended(struct fb_info *info)
2863 {
2864 struct vc_data *vc = NULL;
2865 struct fbcon_ops *ops = info->fbcon_par;
2866
2867 if (!ops || ops->currcon < 0)
2868 return;
2869 vc = vc_cons[ops->currcon].d;
2870
2871 /* Clear cursor, restore saved data */
2872 fbcon_cursor(vc, CM_ERASE);
2873 }
2874
2875 static void fbcon_resumed(struct fb_info *info)
2876 {
2877 struct vc_data *vc;
2878 struct fbcon_ops *ops = info->fbcon_par;
2879
2880 if (!ops || ops->currcon < 0)
2881 return;
2882 vc = vc_cons[ops->currcon].d;
2883
2884 update_screen(vc);
2885 }
2886
2887 static void fbcon_modechanged(struct fb_info *info)
2888 {
2889 struct fbcon_ops *ops = info->fbcon_par;
2890 struct vc_data *vc;
2891 struct display *p;
2892 int rows, cols;
2893
2894 if (!ops || ops->currcon < 0)
2895 return;
2896 vc = vc_cons[ops->currcon].d;
2897 if (vc->vc_mode != KD_TEXT ||
2898 registered_fb[con2fb_map[ops->currcon]] != info)
2899 return;
2900
2901 p = &fb_display[vc->vc_num];
2902 set_blitting_type(vc, info);
2903
2904 if (CON_IS_VISIBLE(vc)) {
2905 var_to_display(p, &info->var, info);
2906 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2907 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2908 cols /= vc->vc_font.width;
2909 rows /= vc->vc_font.height;
2910 vc_resize(vc, cols, rows);
2911 updatescrollmode(p, info, vc);
2912 scrollback_max = 0;
2913 scrollback_current = 0;
2914
2915 if (!fbcon_is_inactive(vc, info)) {
2916 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2917 ops->update_start(info);
2918 }
2919
2920 fbcon_set_palette(vc, color_table);
2921 update_screen(vc);
2922 if (softback_buf)
2923 fbcon_update_softback(vc);
2924 }
2925 }
2926
2927 static void fbcon_set_all_vcs(struct fb_info *info)
2928 {
2929 struct fbcon_ops *ops = info->fbcon_par;
2930 struct vc_data *vc;
2931 struct display *p;
2932 int i, rows, cols, fg = -1;
2933
2934 if (!ops || ops->currcon < 0)
2935 return;
2936
2937 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2938 vc = vc_cons[i].d;
2939 if (!vc || vc->vc_mode != KD_TEXT ||
2940 registered_fb[con2fb_map[i]] != info)
2941 continue;
2942
2943 if (CON_IS_VISIBLE(vc)) {
2944 fg = i;
2945 continue;
2946 }
2947
2948 p = &fb_display[vc->vc_num];
2949 set_blitting_type(vc, info);
2950 var_to_display(p, &info->var, info);
2951 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2952 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2953 cols /= vc->vc_font.width;
2954 rows /= vc->vc_font.height;
2955 vc_resize(vc, cols, rows);
2956 }
2957
2958 if (fg != -1)
2959 fbcon_modechanged(info);
2960 }
2961
2962 static int fbcon_mode_deleted(struct fb_info *info,
2963 struct fb_videomode *mode)
2964 {
2965 struct fb_info *fb_info;
2966 struct display *p;
2967 int i, j, found = 0;
2968
2969 /* before deletion, ensure that mode is not in use */
2970 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2971 j = con2fb_map[i];
2972 if (j == -1)
2973 continue;
2974 fb_info = registered_fb[j];
2975 if (fb_info != info)
2976 continue;
2977 p = &fb_display[i];
2978 if (!p || !p->mode)
2979 continue;
2980 if (fb_mode_is_equal(p->mode, mode)) {
2981 found = 1;
2982 break;
2983 }
2984 }
2985 return found;
2986 }
2987
2988 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2989 static int fbcon_unbind(void)
2990 {
2991 int ret;
2992
2993 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2994 fbcon_is_default);
2995
2996 if (!ret)
2997 fbcon_has_console_bind = 0;
2998
2999 return ret;
3000 }
3001 #else
3002 static inline int fbcon_unbind(void)
3003 {
3004 return -EINVAL;
3005 }
3006 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3007
3008 /* called with console_lock held */
3009 static int fbcon_fb_unbind(int idx)
3010 {
3011 int i, new_idx = -1, ret = 0;
3012
3013 if (!fbcon_has_console_bind)
3014 return 0;
3015
3016 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3017 if (con2fb_map[i] != idx &&
3018 con2fb_map[i] != -1) {
3019 new_idx = i;
3020 break;
3021 }
3022 }
3023
3024 if (new_idx != -1) {
3025 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3026 if (con2fb_map[i] == idx)
3027 set_con2fb_map(i, new_idx, 0);
3028 }
3029 } else {
3030 struct fb_info *info = registered_fb[idx];
3031
3032 /* This is sort of like set_con2fb_map, except it maps
3033 * the consoles to no device and then releases the
3034 * oldinfo to free memory and cancel the cursor blink
3035 * timer. I can imagine this just becoming part of
3036 * set_con2fb_map where new_idx is -1
3037 */
3038 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3039 if (con2fb_map[i] == idx) {
3040 con2fb_map[i] = -1;
3041 if (!search_fb_in_map(idx)) {
3042 ret = con2fb_release_oldinfo(vc_cons[i].d,
3043 info, NULL, i,
3044 idx, 0);
3045 if (ret) {
3046 con2fb_map[i] = idx;
3047 return ret;
3048 }
3049 }
3050 }
3051 }
3052 ret = fbcon_unbind();
3053 }
3054
3055 return ret;
3056 }
3057
3058 /* called with console_lock held */
3059 static int fbcon_fb_unregistered(struct fb_info *info)
3060 {
3061 int i, idx;
3062
3063 idx = info->node;
3064 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3065 if (con2fb_map[i] == idx)
3066 con2fb_map[i] = -1;
3067 }
3068
3069 if (idx == info_idx) {
3070 info_idx = -1;
3071
3072 for (i = 0; i < FB_MAX; i++) {
3073 if (registered_fb[i] != NULL) {
3074 info_idx = i;
3075 break;
3076 }
3077 }
3078 }
3079
3080 if (info_idx != -1) {
3081 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3082 if (con2fb_map[i] == -1)
3083 con2fb_map[i] = info_idx;
3084 }
3085 }
3086
3087 if (primary_device == idx)
3088 primary_device = -1;
3089
3090 if (!num_registered_fb)
3091 do_unregister_con_driver(&fb_con);
3092
3093 return 0;
3094 }
3095
3096 /* called with console_lock held */
3097 static void fbcon_remap_all(int idx)
3098 {
3099 int i;
3100 for (i = first_fb_vc; i <= last_fb_vc; i++)
3101 set_con2fb_map(i, idx, 0);
3102
3103 if (con_is_bound(&fb_con)) {
3104 printk(KERN_INFO "fbcon: Remapping primary device, "
3105 "fb%i, to tty %i-%i\n", idx,
3106 first_fb_vc + 1, last_fb_vc + 1);
3107 info_idx = idx;
3108 }
3109 }
3110
3111 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3112 static void fbcon_select_primary(struct fb_info *info)
3113 {
3114 if (!map_override && primary_device == -1 &&
3115 fb_is_primary_device(info)) {
3116 int i;
3117
3118 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3119 info->fix.id, info->node);
3120 primary_device = info->node;
3121
3122 for (i = first_fb_vc; i <= last_fb_vc; i++)
3123 con2fb_map_boot[i] = primary_device;
3124
3125 if (con_is_bound(&fb_con)) {
3126 printk(KERN_INFO "fbcon: Remapping primary device, "
3127 "fb%i, to tty %i-%i\n", info->node,
3128 first_fb_vc + 1, last_fb_vc + 1);
3129 info_idx = primary_device;
3130 }
3131 }
3132
3133 }
3134 #else
3135 static inline void fbcon_select_primary(struct fb_info *info)
3136 {
3137 return;
3138 }
3139 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3140
3141 /* called with console_lock held */
3142 static int fbcon_fb_registered(struct fb_info *info)
3143 {
3144 int ret = 0, i, idx;
3145
3146 idx = info->node;
3147 fbcon_select_primary(info);
3148
3149 if (info_idx == -1) {
3150 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3151 if (con2fb_map_boot[i] == idx) {
3152 info_idx = idx;
3153 break;
3154 }
3155 }
3156
3157 if (info_idx != -1)
3158 ret = do_fbcon_takeover(1);
3159 } else {
3160 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3161 if (con2fb_map_boot[i] == idx)
3162 set_con2fb_map(i, idx, 0);
3163 }
3164 }
3165
3166 return ret;
3167 }
3168
3169 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3170 {
3171 struct fbcon_ops *ops = info->fbcon_par;
3172 struct vc_data *vc;
3173
3174 if (!ops || ops->currcon < 0)
3175 return;
3176
3177 vc = vc_cons[ops->currcon].d;
3178 if (vc->vc_mode != KD_TEXT ||
3179 registered_fb[con2fb_map[ops->currcon]] != info)
3180 return;
3181
3182 if (CON_IS_VISIBLE(vc)) {
3183 if (blank)
3184 do_blank_screen(0);
3185 else
3186 do_unblank_screen(0);
3187 }
3188 ops->blank_state = blank;
3189 }
3190
3191 static void fbcon_new_modelist(struct fb_info *info)
3192 {
3193 int i;
3194 struct vc_data *vc;
3195 struct fb_var_screeninfo var;
3196 const struct fb_videomode *mode;
3197
3198 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3199 if (registered_fb[con2fb_map[i]] != info)
3200 continue;
3201 if (!fb_display[i].mode)
3202 continue;
3203 vc = vc_cons[i].d;
3204 display_to_var(&var, &fb_display[i]);
3205 mode = fb_find_nearest_mode(fb_display[i].mode,
3206 &info->modelist);
3207 fb_videomode_to_var(&var, mode);
3208 fbcon_set_disp(info, &var, vc->vc_num);
3209 }
3210 }
3211
3212 static void fbcon_get_requirement(struct fb_info *info,
3213 struct fb_blit_caps *caps)
3214 {
3215 struct vc_data *vc;
3216 struct display *p;
3217
3218 if (caps->flags) {
3219 int i, charcnt;
3220
3221 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3222 vc = vc_cons[i].d;
3223 if (vc && vc->vc_mode == KD_TEXT &&
3224 info->node == con2fb_map[i]) {
3225 p = &fb_display[i];
3226 caps->x |= 1 << (vc->vc_font.width - 1);
3227 caps->y |= 1 << (vc->vc_font.height - 1);
3228 charcnt = (p->userfont) ?
3229 FNTCHARCNT(p->fontdata) : 256;
3230 if (caps->len < charcnt)
3231 caps->len = charcnt;
3232 }
3233 }
3234 } else {
3235 vc = vc_cons[fg_console].d;
3236
3237 if (vc && vc->vc_mode == KD_TEXT &&
3238 info->node == con2fb_map[fg_console]) {
3239 p = &fb_display[fg_console];
3240 caps->x = 1 << (vc->vc_font.width - 1);
3241 caps->y = 1 << (vc->vc_font.height - 1);
3242 caps->len = (p->userfont) ?
3243 FNTCHARCNT(p->fontdata) : 256;
3244 }
3245 }
3246 }
3247
3248 static int fbcon_event_notify(struct notifier_block *self,
3249 unsigned long action, void *data)
3250 {
3251 struct fb_event *event = data;
3252 struct fb_info *info = event->info;
3253 struct fb_videomode *mode;
3254 struct fb_con2fbmap *con2fb;
3255 struct fb_blit_caps *caps;
3256 int idx, ret = 0;
3257
3258 /*
3259 * ignore all events except driver registration and deregistration
3260 * if fbcon is not active
3261 */
3262 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3263 action == FB_EVENT_FB_UNREGISTERED))
3264 goto done;
3265
3266 switch(action) {
3267 case FB_EVENT_SUSPEND:
3268 fbcon_suspended(info);
3269 break;
3270 case FB_EVENT_RESUME:
3271 fbcon_resumed(info);
3272 break;
3273 case FB_EVENT_MODE_CHANGE:
3274 fbcon_modechanged(info);
3275 break;
3276 case FB_EVENT_MODE_CHANGE_ALL:
3277 fbcon_set_all_vcs(info);
3278 break;
3279 case FB_EVENT_MODE_DELETE:
3280 mode = event->data;
3281 ret = fbcon_mode_deleted(info, mode);
3282 break;
3283 case FB_EVENT_FB_UNBIND:
3284 idx = info->node;
3285 ret = fbcon_fb_unbind(idx);
3286 break;
3287 case FB_EVENT_FB_REGISTERED:
3288 ret = fbcon_fb_registered(info);
3289 break;
3290 case FB_EVENT_FB_UNREGISTERED:
3291 ret = fbcon_fb_unregistered(info);
3292 break;
3293 case FB_EVENT_SET_CONSOLE_MAP:
3294 /* called with console lock held */
3295 con2fb = event->data;
3296 ret = set_con2fb_map(con2fb->console - 1,
3297 con2fb->framebuffer, 1);
3298 break;
3299 case FB_EVENT_GET_CONSOLE_MAP:
3300 con2fb = event->data;
3301 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3302 break;
3303 case FB_EVENT_BLANK:
3304 fbcon_fb_blanked(info, *(int *)event->data);
3305 break;
3306 case FB_EVENT_NEW_MODELIST:
3307 fbcon_new_modelist(info);
3308 break;
3309 case FB_EVENT_GET_REQ:
3310 caps = event->data;
3311 fbcon_get_requirement(info, caps);
3312 break;
3313 case FB_EVENT_REMAP_ALL_CONSOLE:
3314 idx = info->node;
3315 fbcon_remap_all(idx);
3316 break;
3317 }
3318 done:
3319 return ret;
3320 }
3321
3322 /*
3323 * The console `switch' structure for the frame buffer based console
3324 */
3325
3326 static const struct consw fb_con = {
3327 .owner = THIS_MODULE,
3328 .con_startup = fbcon_startup,
3329 .con_init = fbcon_init,
3330 .con_deinit = fbcon_deinit,
3331 .con_clear = fbcon_clear,
3332 .con_putc = fbcon_putc,
3333 .con_putcs = fbcon_putcs,
3334 .con_cursor = fbcon_cursor,
3335 .con_scroll = fbcon_scroll,
3336 .con_bmove = fbcon_bmove,
3337 .con_switch = fbcon_switch,
3338 .con_blank = fbcon_blank,
3339 .con_font_set = fbcon_set_font,
3340 .con_font_get = fbcon_get_font,
3341 .con_font_default = fbcon_set_def_font,
3342 .con_font_copy = fbcon_copy_font,
3343 .con_set_palette = fbcon_set_palette,
3344 .con_scrolldelta = fbcon_scrolldelta,
3345 .con_set_origin = fbcon_set_origin,
3346 .con_invert_region = fbcon_invert_region,
3347 .con_screen_pos = fbcon_screen_pos,
3348 .con_getxy = fbcon_getxy,
3349 .con_resize = fbcon_resize,
3350 .con_debug_enter = fbcon_debug_enter,
3351 .con_debug_leave = fbcon_debug_leave,
3352 };
3353
3354 static struct notifier_block fbcon_event_notifier = {
3355 .notifier_call = fbcon_event_notify,
3356 };
3357
3358 static ssize_t store_rotate(struct device *device,
3359 struct device_attribute *attr, const char *buf,
3360 size_t count)
3361 {
3362 struct fb_info *info;
3363 int rotate, idx;
3364 char **last = NULL;
3365
3366 if (fbcon_has_exited)
3367 return count;
3368
3369 console_lock();
3370 idx = con2fb_map[fg_console];
3371
3372 if (idx == -1 || registered_fb[idx] == NULL)
3373 goto err;
3374
3375 info = registered_fb[idx];
3376 rotate = simple_strtoul(buf, last, 0);
3377 fbcon_rotate(info, rotate);
3378 err:
3379 console_unlock();
3380 return count;
3381 }
3382
3383 static ssize_t store_rotate_all(struct device *device,
3384 struct device_attribute *attr,const char *buf,
3385 size_t count)
3386 {
3387 struct fb_info *info;
3388 int rotate, idx;
3389 char **last = NULL;
3390
3391 if (fbcon_has_exited)
3392 return count;
3393
3394 console_lock();
3395 idx = con2fb_map[fg_console];
3396
3397 if (idx == -1 || registered_fb[idx] == NULL)
3398 goto err;
3399
3400 info = registered_fb[idx];
3401 rotate = simple_strtoul(buf, last, 0);
3402 fbcon_rotate_all(info, rotate);
3403 err:
3404 console_unlock();
3405 return count;
3406 }
3407
3408 static ssize_t show_rotate(struct device *device,
3409 struct device_attribute *attr,char *buf)
3410 {
3411 struct fb_info *info;
3412 int rotate = 0, idx;
3413
3414 if (fbcon_has_exited)
3415 return 0;
3416
3417 console_lock();
3418 idx = con2fb_map[fg_console];
3419
3420 if (idx == -1 || registered_fb[idx] == NULL)
3421 goto err;
3422
3423 info = registered_fb[idx];
3424 rotate = fbcon_get_rotate(info);
3425 err:
3426 console_unlock();
3427 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3428 }
3429
3430 static ssize_t show_cursor_blink(struct device *device,
3431 struct device_attribute *attr, char *buf)
3432 {
3433 struct fb_info *info;
3434 struct fbcon_ops *ops;
3435 int idx, blink = -1;
3436
3437 if (fbcon_has_exited)
3438 return 0;
3439
3440 console_lock();
3441 idx = con2fb_map[fg_console];
3442
3443 if (idx == -1 || registered_fb[idx] == NULL)
3444 goto err;
3445
3446 info = registered_fb[idx];
3447 ops = info->fbcon_par;
3448
3449 if (!ops)
3450 goto err;
3451
3452 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3453 err:
3454 console_unlock();
3455 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3456 }
3457
3458 static ssize_t store_cursor_blink(struct device *device,
3459 struct device_attribute *attr,
3460 const char *buf, size_t count)
3461 {
3462 struct fb_info *info;
3463 int blink, idx;
3464 char **last = NULL;
3465
3466 if (fbcon_has_exited)
3467 return count;
3468
3469 console_lock();
3470 idx = con2fb_map[fg_console];
3471
3472 if (idx == -1 || registered_fb[idx] == NULL)
3473 goto err;
3474
3475 info = registered_fb[idx];
3476
3477 if (!info->fbcon_par)
3478 goto err;
3479
3480 blink = simple_strtoul(buf, last, 0);
3481
3482 if (blink) {
3483 fbcon_cursor_noblink = 0;
3484 fbcon_add_cursor_timer(info);
3485 } else {
3486 fbcon_cursor_noblink = 1;
3487 fbcon_del_cursor_timer(info);
3488 }
3489
3490 err:
3491 console_unlock();
3492 return count;
3493 }
3494
3495 static struct device_attribute device_attrs[] = {
3496 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3497 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3498 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3499 store_cursor_blink),
3500 };
3501
3502 static int fbcon_init_device(void)
3503 {
3504 int i, error = 0;
3505
3506 fbcon_has_sysfs = 1;
3507
3508 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3509 error = device_create_file(fbcon_device, &device_attrs[i]);
3510
3511 if (error)
3512 break;
3513 }
3514
3515 if (error) {
3516 while (--i >= 0)
3517 device_remove_file(fbcon_device, &device_attrs[i]);
3518
3519 fbcon_has_sysfs = 0;
3520 }
3521
3522 return 0;
3523 }
3524
3525 static void fbcon_start(void)
3526 {
3527 if (num_registered_fb) {
3528 int i;
3529
3530 console_lock();
3531
3532 for (i = 0; i < FB_MAX; i++) {
3533 if (registered_fb[i] != NULL) {
3534 info_idx = i;
3535 break;
3536 }
3537 }
3538
3539 do_fbcon_takeover(0);
3540 console_unlock();
3541
3542 }
3543 }
3544
3545 static void fbcon_exit(void)
3546 {
3547 struct fb_info *info;
3548 int i, j, mapped;
3549
3550 if (fbcon_has_exited)
3551 return;
3552
3553 kfree((void *)softback_buf);
3554 softback_buf = 0UL;
3555
3556 for (i = 0; i < FB_MAX; i++) {
3557 int pending = 0;
3558
3559 mapped = 0;
3560 info = registered_fb[i];
3561
3562 if (info == NULL)
3563 continue;
3564
3565 if (info->queue.func)
3566 pending = cancel_work_sync(&info->queue);
3567 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3568 "no"));
3569
3570 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3571 if (con2fb_map[j] == i) {
3572 mapped = 1;
3573 break;
3574 }
3575 }
3576
3577 if (mapped) {
3578 if (info->fbops->fb_release)
3579 info->fbops->fb_release(info, 0);
3580 module_put(info->fbops->owner);
3581
3582 if (info->fbcon_par) {
3583 struct fbcon_ops *ops = info->fbcon_par;
3584
3585 fbcon_del_cursor_timer(info);
3586 kfree(ops->cursor_src);
3587 kfree(ops->cursor_state.mask);
3588 kfree(info->fbcon_par);
3589 info->fbcon_par = NULL;
3590 }
3591
3592 if (info->queue.func == fb_flashcursor)
3593 info->queue.func = NULL;
3594 }
3595 }
3596
3597 fbcon_has_exited = 1;
3598 }
3599
3600 static int __init fb_console_init(void)
3601 {
3602 int i;
3603
3604 console_lock();
3605 fb_register_client(&fbcon_event_notifier);
3606 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3607 "fbcon");
3608
3609 if (IS_ERR(fbcon_device)) {
3610 printk(KERN_WARNING "Unable to create device "
3611 "for fbcon; errno = %ld\n",
3612 PTR_ERR(fbcon_device));
3613 fbcon_device = NULL;
3614 } else
3615 fbcon_init_device();
3616
3617 for (i = 0; i < MAX_NR_CONSOLES; i++)
3618 con2fb_map[i] = -1;
3619
3620 console_unlock();
3621 fbcon_start();
3622 return 0;
3623 }
3624
3625 fs_initcall(fb_console_init);
3626
3627 #ifdef MODULE
3628
3629 static void __exit fbcon_deinit_device(void)
3630 {
3631 int i;
3632
3633 if (fbcon_has_sysfs) {
3634 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3635 device_remove_file(fbcon_device, &device_attrs[i]);
3636
3637 fbcon_has_sysfs = 0;
3638 }
3639 }
3640
3641 static void __exit fb_console_exit(void)
3642 {
3643 console_lock();
3644 fb_unregister_client(&fbcon_event_notifier);
3645 fbcon_deinit_device();
3646 device_destroy(fb_class, MKDEV(0, 0));
3647 fbcon_exit();
3648 do_unregister_con_driver(&fb_con);
3649 console_unlock();
3650 }
3651
3652 module_exit(fb_console_exit);
3653
3654 #endif
3655
3656 MODULE_LICENSE("GPL");
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