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ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / drivers / video / console / fbcon.c
blob5fa8b76673cb5c07de0066c6f6577434e13b86fc
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80 #include <asm/system.h>
81 #ifdef CONFIG_ATARI
82 #include <asm/atariints.h>
83 #endif
84 #ifdef CONFIG_MAC
85 #include <asm/macints.h>
86 #endif
87 #if defined(__mc68000__)
88 #include <asm/machdep.h>
89 #include <asm/setup.h>
90 #endif
91
92 #include "fbcon.h"
93
94 #ifdef FBCONDEBUG
95 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
96 #else
97 # define DPRINTK(fmt, args...)
98 #endif
99
100 enum {
101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
104 };
105
106 static struct display fb_display[MAX_NR_CONSOLES];
107
108 static signed char con2fb_map[MAX_NR_CONSOLES];
109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
110 #ifndef MODULE
111 static int logo_height;
112 #endif
113 static int logo_lines;
114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116 static int logo_shown = FBCON_LOGO_CANSHOW;
117 /* Software scrollback */
118 static int fbcon_softback_size = 32768;
119 static unsigned long softback_buf, softback_curr;
120 static unsigned long softback_in;
121 static unsigned long softback_top, softback_end;
122 static int softback_lines;
123 /* console mappings */
124 static int first_fb_vc;
125 static int last_fb_vc = MAX_NR_CONSOLES - 1;
126 static int fbcon_is_default = 1;
127 static int fbcon_has_exited;
128 static int primary_device = -1;
129
130 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
131 static int map_override;
132
133 static inline void fbcon_map_override(void)
134 {
135 map_override = 1;
136 }
137 #else
138 static inline void fbcon_map_override(void)
139 {
140 }
141 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
142
143 /* font data */
144 static char fontname[40];
145
146 /* current fb_info */
147 static int info_idx = -1;
148
149 /* console rotation */
150 static int initial_rotation;
151 static int fbcon_has_sysfs;
152
153 static const struct consw fb_con;
154
155 #define CM_SOFTBACK (8)
156
157 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
158
159 static int fbcon_set_origin(struct vc_data *);
160
161 #define CURSOR_DRAW_DELAY (1)
162
163 /* # VBL ints between cursor state changes */
164 #define ATARI_CURSOR_BLINK_RATE (42)
165 #define MAC_CURSOR_BLINK_RATE (32)
166 #define DEFAULT_CURSOR_BLINK_RATE (20)
167
168 static int vbl_cursor_cnt;
169 static int fbcon_cursor_noblink;
170
171 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
172
173 /*
174 * Interface used by the world
175 */
176
177 static const char *fbcon_startup(void);
178 static void fbcon_init(struct vc_data *vc, int init);
179 static void fbcon_deinit(struct vc_data *vc);
180 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
181 int width);
182 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
183 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
184 int count, int ypos, int xpos);
185 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
186 static void fbcon_cursor(struct vc_data *vc, int mode);
187 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
188 int count);
189 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
190 int height, int width);
191 static int fbcon_switch(struct vc_data *vc);
192 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
193 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
194 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
195
196 /*
197 * Internal routines
198 */
199 static __inline__ void ywrap_up(struct vc_data *vc, int count);
200 static __inline__ void ywrap_down(struct vc_data *vc, int count);
201 static __inline__ void ypan_up(struct vc_data *vc, int count);
202 static __inline__ void ypan_down(struct vc_data *vc, int count);
203 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
204 int dy, int dx, int height, int width, u_int y_break);
205 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
206 int unit);
207 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
208 int line, int count, int dy);
209 static void fbcon_modechanged(struct fb_info *info);
210 static void fbcon_set_all_vcs(struct fb_info *info);
211 static void fbcon_start(void);
212 static void fbcon_exit(void);
213 static struct device *fbcon_device;
214
215 #ifdef CONFIG_MAC
216 /*
217 * On the Macintoy, there may or may not be a working VBL int. We need to probe
218 */
219 static int vbl_detected;
220
221 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
222 {
223 vbl_detected++;
224 return IRQ_HANDLED;
225 }
226 #endif
227
228 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
229 static inline void fbcon_set_rotation(struct fb_info *info)
230 {
231 struct fbcon_ops *ops = info->fbcon_par;
232
233 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
234 ops->p->con_rotate < 4)
235 ops->rotate = ops->p->con_rotate;
236 else
237 ops->rotate = 0;
238 }
239
240 static void fbcon_rotate(struct fb_info *info, u32 rotate)
241 {
242 struct fbcon_ops *ops= info->fbcon_par;
243 struct fb_info *fb_info;
244
245 if (!ops || ops->currcon == -1)
246 return;
247
248 fb_info = registered_fb[con2fb_map[ops->currcon]];
249
250 if (info == fb_info) {
251 struct display *p = &fb_display[ops->currcon];
252
253 if (rotate < 4)
254 p->con_rotate = rotate;
255 else
256 p->con_rotate = 0;
257
258 fbcon_modechanged(info);
259 }
260 }
261
262 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
263 {
264 struct fbcon_ops *ops = info->fbcon_par;
265 struct vc_data *vc;
266 struct display *p;
267 int i;
268
269 if (!ops || ops->currcon < 0 || rotate > 3)
270 return;
271
272 for (i = first_fb_vc; i <= last_fb_vc; i++) {
273 vc = vc_cons[i].d;
274 if (!vc || vc->vc_mode != KD_TEXT ||
275 registered_fb[con2fb_map[i]] != info)
276 continue;
277
278 p = &fb_display[vc->vc_num];
279 p->con_rotate = rotate;
280 }
281
282 fbcon_set_all_vcs(info);
283 }
284 #else
285 static inline void fbcon_set_rotation(struct fb_info *info)
286 {
287 struct fbcon_ops *ops = info->fbcon_par;
288
289 ops->rotate = FB_ROTATE_UR;
290 }
291
292 static void fbcon_rotate(struct fb_info *info, u32 rotate)
293 {
294 return;
295 }
296
297 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
298 {
299 return;
300 }
301 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
302
303 static int fbcon_get_rotate(struct fb_info *info)
304 {
305 struct fbcon_ops *ops = info->fbcon_par;
306
307 return (ops) ? ops->rotate : 0;
308 }
309
310 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
311 {
312 struct fbcon_ops *ops = info->fbcon_par;
313
314 return (info->state != FBINFO_STATE_RUNNING ||
315 vc->vc_mode != KD_TEXT || ops->graphics);
316 }
317
318 static inline int get_color(struct vc_data *vc, struct fb_info *info,
319 u16 c, int is_fg)
320 {
321 int depth = fb_get_color_depth(&info->var, &info->fix);
322 int color = 0;
323
324 if (console_blanked) {
325 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
326
327 c = vc->vc_video_erase_char & charmask;
328 }
329
330 if (depth != 1)
331 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
332 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
333
334 switch (depth) {
335 case 1:
336 {
337 int col = mono_col(info);
338 /* 0 or 1 */
339 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
340 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
341
342 if (console_blanked)
343 fg = bg;
344
345 color = (is_fg) ? fg : bg;
346 break;
347 }
348 case 2:
349 /*
350 * Scale down 16-colors to 4 colors. Default 4-color palette
351 * is grayscale. However, simply dividing the values by 4
352 * will not work, as colors 1, 2 and 3 will be scaled-down
353 * to zero rendering them invisible. So empirically convert
354 * colors to a sane 4-level grayscale.
355 */
356 switch (color) {
357 case 0:
358 color = 0; /* black */
359 break;
360 case 1 ... 6:
361 color = 2; /* white */
362 break;
363 case 7 ... 8:
364 color = 1; /* gray */
365 break;
366 default:
367 color = 3; /* intense white */
368 break;
369 }
370 break;
371 case 3:
372 /*
373 * Last 8 entries of default 16-color palette is a more intense
374 * version of the first 8 (i.e., same chrominance, different
375 * luminance).
376 */
377 color &= 7;
378 break;
379 }
380
381
382 return color;
383 }
384
385 static void fbcon_update_softback(struct vc_data *vc)
386 {
387 int l = fbcon_softback_size / vc->vc_size_row;
388
389 if (l > 5)
390 softback_end = softback_buf + l * vc->vc_size_row;
391 else
392 /* Smaller scrollback makes no sense, and 0 would screw
393 the operation totally */
394 softback_top = 0;
395 }
396
397 static void fb_flashcursor(struct work_struct *work)
398 {
399 struct fb_info *info = container_of(work, struct fb_info, queue);
400 struct fbcon_ops *ops = info->fbcon_par;
401 struct display *p;
402 struct vc_data *vc = NULL;
403 int c;
404 int mode;
405
406 acquire_console_sem();
407 if (ops && ops->currcon != -1)
408 vc = vc_cons[ops->currcon].d;
409
410 if (!vc || !CON_IS_VISIBLE(vc) ||
411 registered_fb[con2fb_map[vc->vc_num]] != info ||
412 vc->vc_deccm != 1) {
413 release_console_sem();
414 return;
415 }
416
417 p = &fb_display[vc->vc_num];
418 c = scr_readw((u16 *) vc->vc_pos);
419 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
420 CM_ERASE : CM_DRAW;
421 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
422 get_color(vc, info, c, 0));
423 release_console_sem();
424 }
425
426 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
427 static int cursor_blink_rate;
428 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
429 {
430 struct fb_info *info = dev_id;
431
432 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
433 schedule_work(&info->queue);
434 vbl_cursor_cnt = cursor_blink_rate;
435 }
436 return IRQ_HANDLED;
437 }
438 #endif
439
440 static void cursor_timer_handler(unsigned long dev_addr)
441 {
442 struct fb_info *info = (struct fb_info *) dev_addr;
443 struct fbcon_ops *ops = info->fbcon_par;
444
445 schedule_work(&info->queue);
446 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
447 }
448
449 static void fbcon_add_cursor_timer(struct fb_info *info)
450 {
451 struct fbcon_ops *ops = info->fbcon_par;
452
453 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
454 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
455 !fbcon_cursor_noblink) {
456 if (!info->queue.func)
457 INIT_WORK(&info->queue, fb_flashcursor);
458
459 init_timer(&ops->cursor_timer);
460 ops->cursor_timer.function = cursor_timer_handler;
461 ops->cursor_timer.expires = jiffies + HZ / 5;
462 ops->cursor_timer.data = (unsigned long ) info;
463 add_timer(&ops->cursor_timer);
464 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
465 }
466 }
467
468 static void fbcon_del_cursor_timer(struct fb_info *info)
469 {
470 struct fbcon_ops *ops = info->fbcon_par;
471
472 if (info->queue.func == fb_flashcursor &&
473 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
474 del_timer_sync(&ops->cursor_timer);
475 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
476 }
477 }
478
479 #ifndef MODULE
480 static int __init fb_console_setup(char *this_opt)
481 {
482 char *options;
483 int i, j;
484
485 if (!this_opt || !*this_opt)
486 return 1;
487
488 while ((options = strsep(&this_opt, ",")) != NULL) {
489 if (!strncmp(options, "font:", 5))
490 strcpy(fontname, options + 5);
491
492 if (!strncmp(options, "scrollback:", 11)) {
493 options += 11;
494 if (*options) {
495 fbcon_softback_size = simple_strtoul(options, &options, 0);
496 if (*options == 'k' || *options == 'K') {
497 fbcon_softback_size *= 1024;
498 options++;
499 }
500 if (*options != ',')
501 return 1;
502 options++;
503 } else
504 return 1;
505 }
506
507 if (!strncmp(options, "map:", 4)) {
508 options += 4;
509 if (*options) {
510 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
511 if (!options[j])
512 j = 0;
513 con2fb_map_boot[i] =
514 (options[j++]-'0') % FB_MAX;
515 }
516
517 fbcon_map_override();
518 }
519
520 return 1;
521 }
522
523 if (!strncmp(options, "vc:", 3)) {
524 options += 3;
525 if (*options)
526 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
527 if (first_fb_vc < 0)
528 first_fb_vc = 0;
529 if (*options++ == '-')
530 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
531 fbcon_is_default = 0;
532 }
533
534 if (!strncmp(options, "rotate:", 7)) {
535 options += 7;
536 if (*options)
537 initial_rotation = simple_strtoul(options, &options, 0);
538 if (initial_rotation > 3)
539 initial_rotation = 0;
540 }
541 }
542 return 1;
543 }
544
545 __setup("fbcon=", fb_console_setup);
546 #endif
547
548 static int search_fb_in_map(int idx)
549 {
550 int i, retval = 0;
551
552 for (i = first_fb_vc; i <= last_fb_vc; i++) {
553 if (con2fb_map[i] == idx)
554 retval = 1;
555 }
556 return retval;
557 }
558
559 static int search_for_mapped_con(void)
560 {
561 int i, retval = 0;
562
563 for (i = first_fb_vc; i <= last_fb_vc; i++) {
564 if (con2fb_map[i] != -1)
565 retval = 1;
566 }
567 return retval;
568 }
569
570 static int fbcon_takeover(int show_logo)
571 {
572 int err, i;
573
574 if (!num_registered_fb)
575 return -ENODEV;
576
577 if (!show_logo)
578 logo_shown = FBCON_LOGO_DONTSHOW;
579
580 for (i = first_fb_vc; i <= last_fb_vc; i++)
581 con2fb_map[i] = info_idx;
582
583 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
584 fbcon_is_default);
585
586 if (err) {
587 for (i = first_fb_vc; i <= last_fb_vc; i++) {
588 con2fb_map[i] = -1;
589 }
590 info_idx = -1;
591 }
592
593 return err;
594 }
595
596 #ifdef MODULE
597 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
598 int cols, int rows, int new_cols, int new_rows)
599 {
600 logo_shown = FBCON_LOGO_DONTSHOW;
601 }
602 #else
603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
604 int cols, int rows, int new_cols, int new_rows)
605 {
606 /* Need to make room for the logo */
607 struct fbcon_ops *ops = info->fbcon_par;
608 int cnt, erase = vc->vc_video_erase_char, step;
609 unsigned short *save = NULL, *r, *q;
610
611 if (info->flags & FBINFO_MODULE) {
612 logo_shown = FBCON_LOGO_DONTSHOW;
613 return;
614 }
615
616 /*
617 * remove underline attribute from erase character
618 * if black and white framebuffer.
619 */
620 if (fb_get_color_depth(&info->var, &info->fix) == 1)
621 erase &= ~0x400;
622 logo_height = fb_prepare_logo(info, ops->rotate);
623 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
624 q = (unsigned short *) (vc->vc_origin +
625 vc->vc_size_row * rows);
626 step = logo_lines * cols;
627 for (r = q - logo_lines * cols; r < q; r++)
628 if (scr_readw(r) != vc->vc_video_erase_char)
629 break;
630 if (r != q && new_rows >= rows + logo_lines) {
631 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
632 if (save) {
633 int i = cols < new_cols ? cols : new_cols;
634 scr_memsetw(save, erase, logo_lines * new_cols * 2);
635 r = q - step;
636 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
637 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
638 r = q;
639 }
640 }
641 if (r == q) {
642 /* We can scroll screen down */
643 r = q - step - cols;
644 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
645 scr_memcpyw(r + step, r, vc->vc_size_row);
646 r -= cols;
647 }
648 if (!save) {
649 int lines;
650 if (vc->vc_y + logo_lines >= rows)
651 lines = rows - vc->vc_y - 1;
652 else
653 lines = logo_lines;
654 vc->vc_y += lines;
655 vc->vc_pos += lines * vc->vc_size_row;
656 }
657 }
658 scr_memsetw((unsigned short *) vc->vc_origin,
659 erase,
660 vc->vc_size_row * logo_lines);
661
662 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
663 fbcon_clear_margins(vc, 0);
664 update_screen(vc);
665 }
666
667 if (save) {
668 q = (unsigned short *) (vc->vc_origin +
669 vc->vc_size_row *
670 rows);
671 scr_memcpyw(q, save, logo_lines * new_cols * 2);
672 vc->vc_y += logo_lines;
673 vc->vc_pos += logo_lines * vc->vc_size_row;
674 kfree(save);
675 }
676
677 if (logo_lines > vc->vc_bottom) {
678 logo_shown = FBCON_LOGO_CANSHOW;
679 printk(KERN_INFO
680 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
681 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
682 logo_shown = FBCON_LOGO_DRAW;
683 vc->vc_top = logo_lines;
684 }
685 }
686 #endif /* MODULE */
687
688 #ifdef CONFIG_FB_TILEBLITTING
689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
690 {
691 struct fbcon_ops *ops = info->fbcon_par;
692
693 ops->p = &fb_display[vc->vc_num];
694
695 if ((info->flags & FBINFO_MISC_TILEBLITTING))
696 fbcon_set_tileops(vc, info);
697 else {
698 fbcon_set_rotation(info);
699 fbcon_set_bitops(ops);
700 }
701 }
702
703 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
704 {
705 int err = 0;
706
707 if (info->flags & FBINFO_MISC_TILEBLITTING &&
708 info->tileops->fb_get_tilemax(info) < charcount)
709 err = 1;
710
711 return err;
712 }
713 #else
714 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
715 {
716 struct fbcon_ops *ops = info->fbcon_par;
717
718 info->flags &= ~FBINFO_MISC_TILEBLITTING;
719 ops->p = &fb_display[vc->vc_num];
720 fbcon_set_rotation(info);
721 fbcon_set_bitops(ops);
722 }
723
724 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
725 {
726 return 0;
727 }
728
729 #endif /* CONFIG_MISC_TILEBLITTING */
730
731
732 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
733 int unit, int oldidx)
734 {
735 struct fbcon_ops *ops = NULL;
736 int err = 0;
737
738 if (!try_module_get(info->fbops->owner))
739 err = -ENODEV;
740
741 if (!err && info->fbops->fb_open &&
742 info->fbops->fb_open(info, 0))
743 err = -ENODEV;
744
745 if (!err) {
746 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
747 if (!ops)
748 err = -ENOMEM;
749 }
750
751 if (!err) {
752 info->fbcon_par = ops;
753
754 if (vc)
755 set_blitting_type(vc, info);
756 }
757
758 if (err) {
759 con2fb_map[unit] = oldidx;
760 module_put(info->fbops->owner);
761 }
762
763 return err;
764 }
765
766 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
767 struct fb_info *newinfo, int unit,
768 int oldidx, int found)
769 {
770 struct fbcon_ops *ops = oldinfo->fbcon_par;
771 int err = 0;
772
773 if (oldinfo->fbops->fb_release &&
774 oldinfo->fbops->fb_release(oldinfo, 0)) {
775 con2fb_map[unit] = oldidx;
776 if (!found && newinfo->fbops->fb_release)
777 newinfo->fbops->fb_release(newinfo, 0);
778 if (!found)
779 module_put(newinfo->fbops->owner);
780 err = -ENODEV;
781 }
782
783 if (!err) {
784 fbcon_del_cursor_timer(oldinfo);
785 kfree(ops->cursor_state.mask);
786 kfree(ops->cursor_data);
787 kfree(ops->fontbuffer);
788 kfree(oldinfo->fbcon_par);
789 oldinfo->fbcon_par = NULL;
790 module_put(oldinfo->fbops->owner);
791 /*
792 If oldinfo and newinfo are driving the same hardware,
793 the fb_release() method of oldinfo may attempt to
794 restore the hardware state. This will leave the
795 newinfo in an undefined state. Thus, a call to
796 fb_set_par() may be needed for the newinfo.
797 */
798 if (newinfo->fbops->fb_set_par)
799 newinfo->fbops->fb_set_par(newinfo);
800 }
801
802 return err;
803 }
804
805 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
806 int unit, int show_logo)
807 {
808 struct fbcon_ops *ops = info->fbcon_par;
809
810 ops->currcon = fg_console;
811
812 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
813 info->fbops->fb_set_par(info);
814
815 ops->flags |= FBCON_FLAGS_INIT;
816 ops->graphics = 0;
817 fbcon_set_disp(info, &info->var, unit);
818
819 if (show_logo) {
820 struct vc_data *fg_vc = vc_cons[fg_console].d;
821 struct fb_info *fg_info =
822 registered_fb[con2fb_map[fg_console]];
823
824 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
825 fg_vc->vc_rows, fg_vc->vc_cols,
826 fg_vc->vc_rows);
827 }
828
829 update_screen(vc_cons[fg_console].d);
830 }
831
832 /**
833 * set_con2fb_map - map console to frame buffer device
834 * @unit: virtual console number to map
835 * @newidx: frame buffer index to map virtual console to
836 * @user: user request
837 *
838 * Maps a virtual console @unit to a frame buffer device
839 * @newidx.
840 */
841 static int set_con2fb_map(int unit, int newidx, int user)
842 {
843 struct vc_data *vc = vc_cons[unit].d;
844 int oldidx = con2fb_map[unit];
845 struct fb_info *info = registered_fb[newidx];
846 struct fb_info *oldinfo = NULL;
847 int found, err = 0;
848
849 if (oldidx == newidx)
850 return 0;
851
852 if (!info || fbcon_has_exited)
853 return -EINVAL;
854
855 if (!err && !search_for_mapped_con()) {
856 info_idx = newidx;
857 return fbcon_takeover(0);
858 }
859
860 if (oldidx != -1)
861 oldinfo = registered_fb[oldidx];
862
863 found = search_fb_in_map(newidx);
864
865 acquire_console_sem();
866 con2fb_map[unit] = newidx;
867 if (!err && !found)
868 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
869
870
871 /*
872 * If old fb is not mapped to any of the consoles,
873 * fbcon should release it.
874 */
875 if (!err && oldinfo && !search_fb_in_map(oldidx))
876 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
877 found);
878
879 if (!err) {
880 int show_logo = (fg_console == 0 && !user &&
881 logo_shown != FBCON_LOGO_DONTSHOW);
882
883 if (!found)
884 fbcon_add_cursor_timer(info);
885 con2fb_map_boot[unit] = newidx;
886 con2fb_init_display(vc, info, unit, show_logo);
887 }
888
889 if (!search_fb_in_map(info_idx))
890 info_idx = newidx;
891
892 release_console_sem();
893 return err;
894 }
895
896 /*
897 * Low Level Operations
898 */
899 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
900 static int var_to_display(struct display *disp,
901 struct fb_var_screeninfo *var,
902 struct fb_info *info)
903 {
904 disp->xres_virtual = var->xres_virtual;
905 disp->yres_virtual = var->yres_virtual;
906 disp->bits_per_pixel = var->bits_per_pixel;
907 disp->grayscale = var->grayscale;
908 disp->nonstd = var->nonstd;
909 disp->accel_flags = var->accel_flags;
910 disp->height = var->height;
911 disp->width = var->width;
912 disp->red = var->red;
913 disp->green = var->green;
914 disp->blue = var->blue;
915 disp->transp = var->transp;
916 disp->rotate = var->rotate;
917 disp->mode = fb_match_mode(var, &info->modelist);
918 if (disp->mode == NULL)
919 /* This should not happen */
920 return -EINVAL;
921 return 0;
922 }
923
924 static void display_to_var(struct fb_var_screeninfo *var,
925 struct display *disp)
926 {
927 fb_videomode_to_var(var, disp->mode);
928 var->xres_virtual = disp->xres_virtual;
929 var->yres_virtual = disp->yres_virtual;
930 var->bits_per_pixel = disp->bits_per_pixel;
931 var->grayscale = disp->grayscale;
932 var->nonstd = disp->nonstd;
933 var->accel_flags = disp->accel_flags;
934 var->height = disp->height;
935 var->width = disp->width;
936 var->red = disp->red;
937 var->green = disp->green;
938 var->blue = disp->blue;
939 var->transp = disp->transp;
940 var->rotate = disp->rotate;
941 }
942
943 static const char *fbcon_startup(void)
944 {
945 const char *display_desc = "frame buffer device";
946 struct display *p = &fb_display[fg_console];
947 struct vc_data *vc = vc_cons[fg_console].d;
948 const struct font_desc *font = NULL;
949 struct module *owner;
950 struct fb_info *info = NULL;
951 struct fbcon_ops *ops;
952 int rows, cols;
953 int irqres;
954
955 irqres = 1;
956 /*
957 * If num_registered_fb is zero, this is a call for the dummy part.
958 * The frame buffer devices weren't initialized yet.
959 */
960 if (!num_registered_fb || info_idx == -1)
961 return display_desc;
962 /*
963 * Instead of blindly using registered_fb[0], we use info_idx, set by
964 * fb_console_init();
965 */
966 info = registered_fb[info_idx];
967 if (!info)
968 return NULL;
969
970 owner = info->fbops->owner;
971 if (!try_module_get(owner))
972 return NULL;
973 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
974 module_put(owner);
975 return NULL;
976 }
977
978 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
979 if (!ops) {
980 module_put(owner);
981 return NULL;
982 }
983
984 ops->currcon = -1;
985 ops->graphics = 1;
986 ops->cur_rotate = -1;
987 info->fbcon_par = ops;
988 p->con_rotate = initial_rotation;
989 set_blitting_type(vc, info);
990
991 if (info->fix.type != FB_TYPE_TEXT) {
992 if (fbcon_softback_size) {
993 if (!softback_buf) {
994 softback_buf =
995 (unsigned long)
996 kmalloc(fbcon_softback_size,
997 GFP_KERNEL);
998 if (!softback_buf) {
999 fbcon_softback_size = 0;
1000 softback_top = 0;
1001 }
1002 }
1003 } else {
1004 if (softback_buf) {
1005 kfree((void *) softback_buf);
1006 softback_buf = 0;
1007 softback_top = 0;
1008 }
1009 }
1010 if (softback_buf)
1011 softback_in = softback_top = softback_curr =
1012 softback_buf;
1013 softback_lines = 0;
1014 }
1015
1016 /* Setup default font */
1017 if (!p->fontdata) {
1018 if (!fontname[0] || !(font = find_font(fontname)))
1019 font = get_default_font(info->var.xres,
1020 info->var.yres,
1021 info->pixmap.blit_x,
1022 info->pixmap.blit_y);
1023 vc->vc_font.width = font->width;
1024 vc->vc_font.height = font->height;
1025 vc->vc_font.data = (void *)(p->fontdata = font->data);
1026 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1027 }
1028
1029 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1030 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1031 cols /= vc->vc_font.width;
1032 rows /= vc->vc_font.height;
1033 vc_resize(vc, cols, rows);
1034
1035 DPRINTK("mode: %s\n", info->fix.id);
1036 DPRINTK("visual: %d\n", info->fix.visual);
1037 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1038 info->var.yres,
1039 info->var.bits_per_pixel);
1040
1041 #ifdef CONFIG_ATARI
1042 if (MACH_IS_ATARI) {
1043 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1044 irqres =
1045 request_irq(IRQ_AUTO_4, fb_vbl_handler,
1046 IRQ_TYPE_PRIO, "framebuffer vbl",
1047 info);
1048 }
1049 #endif /* CONFIG_ATARI */
1050
1051 #ifdef CONFIG_MAC
1052 /*
1053 * On a Macintoy, the VBL interrupt may or may not be active.
1054 * As interrupt based cursor is more reliable and race free, we
1055 * probe for VBL interrupts.
1056 */
1057 if (MACH_IS_MAC) {
1058 int ct = 0;
1059 /*
1060 * Probe for VBL: set temp. handler ...
1061 */
1062 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1063 "framebuffer vbl", info);
1064 vbl_detected = 0;
1065
1066 /*
1067 * ... and spin for 20 ms ...
1068 */
1069 while (!vbl_detected && ++ct < 1000)
1070 udelay(20);
1071
1072 if (ct == 1000)
1073 printk
1074 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1075
1076 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1077
1078 if (vbl_detected) {
1079 /*
1080 * interrupt based cursor ok
1081 */
1082 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1083 irqres =
1084 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1085 "framebuffer vbl", info);
1086 } else {
1087 /*
1088 * VBL not detected: fall through, use timer based cursor
1089 */
1090 irqres = 1;
1091 }
1092 }
1093 #endif /* CONFIG_MAC */
1094
1095 fbcon_add_cursor_timer(info);
1096 fbcon_has_exited = 0;
1097 return display_desc;
1098 }
1099
1100 static void fbcon_init(struct vc_data *vc, int init)
1101 {
1102 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1103 struct fbcon_ops *ops;
1104 struct vc_data **default_mode = vc->vc_display_fg;
1105 struct vc_data *svc = *default_mode;
1106 struct display *t, *p = &fb_display[vc->vc_num];
1107 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1108 int cap;
1109
1110 if (info_idx == -1 || info == NULL)
1111 return;
1112
1113 cap = info->flags;
1114
1115 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1116 (info->fix.type == FB_TYPE_TEXT))
1117 logo = 0;
1118
1119 if (var_to_display(p, &info->var, info))
1120 return;
1121
1122 if (!info->fbcon_par)
1123 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1124
1125 /* If we are not the first console on this
1126 fb, copy the font from that console */
1127 t = &fb_display[fg_console];
1128 if (!p->fontdata) {
1129 if (t->fontdata) {
1130 struct vc_data *fvc = vc_cons[fg_console].d;
1131
1132 vc->vc_font.data = (void *)(p->fontdata =
1133 fvc->vc_font.data);
1134 vc->vc_font.width = fvc->vc_font.width;
1135 vc->vc_font.height = fvc->vc_font.height;
1136 p->userfont = t->userfont;
1137
1138 if (p->userfont)
1139 REFCOUNT(p->fontdata)++;
1140 } else {
1141 const struct font_desc *font = NULL;
1142
1143 if (!fontname[0] || !(font = find_font(fontname)))
1144 font = get_default_font(info->var.xres,
1145 info->var.yres,
1146 info->pixmap.blit_x,
1147 info->pixmap.blit_y);
1148 vc->vc_font.width = font->width;
1149 vc->vc_font.height = font->height;
1150 vc->vc_font.data = (void *)(p->fontdata = font->data);
1151 vc->vc_font.charcount = 256; /* FIXME Need to
1152 support more fonts */
1153 }
1154 }
1155
1156 if (p->userfont)
1157 charcnt = FNTCHARCNT(p->fontdata);
1158
1159 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1160 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1161 if (charcnt == 256) {
1162 vc->vc_hi_font_mask = 0;
1163 } else {
1164 vc->vc_hi_font_mask = 0x100;
1165 if (vc->vc_can_do_color)
1166 vc->vc_complement_mask <<= 1;
1167 }
1168
1169 if (!*svc->vc_uni_pagedir_loc)
1170 con_set_default_unimap(svc);
1171 if (!*vc->vc_uni_pagedir_loc)
1172 con_copy_unimap(vc, svc);
1173
1174 ops = info->fbcon_par;
1175 p->con_rotate = initial_rotation;
1176 set_blitting_type(vc, info);
1177
1178 cols = vc->vc_cols;
1179 rows = vc->vc_rows;
1180 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1181 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1182 new_cols /= vc->vc_font.width;
1183 new_rows /= vc->vc_font.height;
1184 vc_resize(vc, new_cols, new_rows);
1185
1186 /*
1187 * We must always set the mode. The mode of the previous console
1188 * driver could be in the same resolution but we are using different
1189 * hardware so we have to initialize the hardware.
1190 *
1191 * We need to do it in fbcon_init() to prevent screen corruption.
1192 */
1193 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1194 if (info->fbops->fb_set_par &&
1195 !(ops->flags & FBCON_FLAGS_INIT))
1196 info->fbops->fb_set_par(info);
1197 ops->flags |= FBCON_FLAGS_INIT;
1198 }
1199
1200 ops->graphics = 0;
1201
1202 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1203 !(cap & FBINFO_HWACCEL_DISABLED))
1204 p->scrollmode = SCROLL_MOVE;
1205 else /* default to something safe */
1206 p->scrollmode = SCROLL_REDRAW;
1207
1208 /*
1209 * ++guenther: console.c:vc_allocate() relies on initializing
1210 * vc_{cols,rows}, but we must not set those if we are only
1211 * resizing the console.
1212 */
1213 if (!init) {
1214 vc->vc_cols = new_cols;
1215 vc->vc_rows = new_rows;
1216 }
1217
1218 if (logo)
1219 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1220
1221 if (vc == svc && softback_buf)
1222 fbcon_update_softback(vc);
1223
1224 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1225 ops->rotate = FB_ROTATE_UR;
1226 set_blitting_type(vc, info);
1227 }
1228
1229 ops->p = &fb_display[fg_console];
1230 }
1231
1232 static void fbcon_free_font(struct display *p)
1233 {
1234 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1235 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1236 p->fontdata = NULL;
1237 p->userfont = 0;
1238 }
1239
1240 static void fbcon_deinit(struct vc_data *vc)
1241 {
1242 struct display *p = &fb_display[vc->vc_num];
1243 struct fb_info *info;
1244 struct fbcon_ops *ops;
1245 int idx;
1246
1247 fbcon_free_font(p);
1248 idx = con2fb_map[vc->vc_num];
1249
1250 if (idx == -1)
1251 goto finished;
1252
1253 info = registered_fb[idx];
1254
1255 if (!info)
1256 goto finished;
1257
1258 ops = info->fbcon_par;
1259
1260 if (!ops)
1261 goto finished;
1262
1263 if (CON_IS_VISIBLE(vc))
1264 fbcon_del_cursor_timer(info);
1265
1266 ops->flags &= ~FBCON_FLAGS_INIT;
1267 finished:
1268
1269 if (!con_is_bound(&fb_con))
1270 fbcon_exit();
1271
1272 return;
1273 }
1274
1275 /* ====================================================================== */
1276
1277 /* fbcon_XXX routines - interface used by the world
1278 *
1279 * This system is now divided into two levels because of complications
1280 * caused by hardware scrolling. Top level functions:
1281 *
1282 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1283 *
1284 * handles y values in range [0, scr_height-1] that correspond to real
1285 * screen positions. y_wrap shift means that first line of bitmap may be
1286 * anywhere on this display. These functions convert lineoffsets to
1287 * bitmap offsets and deal with the wrap-around case by splitting blits.
1288 *
1289 * fbcon_bmove_physical_8() -- These functions fast implementations
1290 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1291 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1292 *
1293 * WARNING:
1294 *
1295 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1296 * Implies should only really hardware scroll in rows. Only reason for
1297 * restriction is simplicity & efficiency at the moment.
1298 */
1299
1300 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1301 int width)
1302 {
1303 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1304 struct fbcon_ops *ops = info->fbcon_par;
1305
1306 struct display *p = &fb_display[vc->vc_num];
1307 u_int y_break;
1308
1309 if (fbcon_is_inactive(vc, info))
1310 return;
1311
1312 if (!height || !width)
1313 return;
1314
1315 /* Split blits that cross physical y_wrap boundary */
1316
1317 y_break = p->vrows - p->yscroll;
1318 if (sy < y_break && sy + height - 1 >= y_break) {
1319 u_int b = y_break - sy;
1320 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1321 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1322 width);
1323 } else
1324 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1325 }
1326
1327 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1328 int count, int ypos, int xpos)
1329 {
1330 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1331 struct display *p = &fb_display[vc->vc_num];
1332 struct fbcon_ops *ops = info->fbcon_par;
1333
1334 if (!fbcon_is_inactive(vc, info))
1335 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1336 get_color(vc, info, scr_readw(s), 1),
1337 get_color(vc, info, scr_readw(s), 0));
1338 }
1339
1340 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1341 {
1342 unsigned short chr;
1343
1344 scr_writew(c, &chr);
1345 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1346 }
1347
1348 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1349 {
1350 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1351 struct fbcon_ops *ops = info->fbcon_par;
1352
1353 if (!fbcon_is_inactive(vc, info))
1354 ops->clear_margins(vc, info, bottom_only);
1355 }
1356
1357 static void fbcon_cursor(struct vc_data *vc, int mode)
1358 {
1359 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1360 struct fbcon_ops *ops = info->fbcon_par;
1361 int y;
1362 int c = scr_readw((u16 *) vc->vc_pos);
1363
1364 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1365 return;
1366
1367 if (vc->vc_cursor_type & 0x10)
1368 fbcon_del_cursor_timer(info);
1369 else
1370 fbcon_add_cursor_timer(info);
1371
1372 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1373 if (mode & CM_SOFTBACK) {
1374 mode &= ~CM_SOFTBACK;
1375 y = softback_lines;
1376 } else {
1377 if (softback_lines)
1378 fbcon_set_origin(vc);
1379 y = 0;
1380 }
1381
1382 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1383 get_color(vc, info, c, 0));
1384 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1385 }
1386
1387 static int scrollback_phys_max = 0;
1388 static int scrollback_max = 0;
1389 static int scrollback_current = 0;
1390
1391 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1392 int unit)
1393 {
1394 struct display *p, *t;
1395 struct vc_data **default_mode, *vc;
1396 struct vc_data *svc;
1397 struct fbcon_ops *ops = info->fbcon_par;
1398 int rows, cols, charcnt = 256;
1399
1400 p = &fb_display[unit];
1401
1402 if (var_to_display(p, var, info))
1403 return;
1404
1405 vc = vc_cons[unit].d;
1406
1407 if (!vc)
1408 return;
1409
1410 default_mode = vc->vc_display_fg;
1411 svc = *default_mode;
1412 t = &fb_display[svc->vc_num];
1413
1414 if (!vc->vc_font.data) {
1415 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1416 vc->vc_font.width = (*default_mode)->vc_font.width;
1417 vc->vc_font.height = (*default_mode)->vc_font.height;
1418 p->userfont = t->userfont;
1419 if (p->userfont)
1420 REFCOUNT(p->fontdata)++;
1421 }
1422 if (p->userfont)
1423 charcnt = FNTCHARCNT(p->fontdata);
1424
1425 var->activate = FB_ACTIVATE_NOW;
1426 info->var.activate = var->activate;
1427 var->yoffset = info->var.yoffset;
1428 var->xoffset = info->var.xoffset;
1429 fb_set_var(info, var);
1430 ops->var = info->var;
1431 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1432 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1433 if (charcnt == 256) {
1434 vc->vc_hi_font_mask = 0;
1435 } else {
1436 vc->vc_hi_font_mask = 0x100;
1437 if (vc->vc_can_do_color)
1438 vc->vc_complement_mask <<= 1;
1439 }
1440
1441 if (!*svc->vc_uni_pagedir_loc)
1442 con_set_default_unimap(svc);
1443 if (!*vc->vc_uni_pagedir_loc)
1444 con_copy_unimap(vc, svc);
1445
1446 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1447 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1448 cols /= vc->vc_font.width;
1449 rows /= vc->vc_font.height;
1450 vc_resize(vc, cols, rows);
1451
1452 if (CON_IS_VISIBLE(vc)) {
1453 update_screen(vc);
1454 if (softback_buf)
1455 fbcon_update_softback(vc);
1456 }
1457 }
1458
1459 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1460 {
1461 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1462 struct fbcon_ops *ops = info->fbcon_par;
1463 struct display *p = &fb_display[vc->vc_num];
1464
1465 p->yscroll += count;
1466 if (p->yscroll >= p->vrows) /* Deal with wrap */
1467 p->yscroll -= p->vrows;
1468 ops->var.xoffset = 0;
1469 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1470 ops->var.vmode |= FB_VMODE_YWRAP;
1471 ops->update_start(info);
1472 scrollback_max += count;
1473 if (scrollback_max > scrollback_phys_max)
1474 scrollback_max = scrollback_phys_max;
1475 scrollback_current = 0;
1476 }
1477
1478 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1479 {
1480 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1481 struct fbcon_ops *ops = info->fbcon_par;
1482 struct display *p = &fb_display[vc->vc_num];
1483
1484 p->yscroll -= count;
1485 if (p->yscroll < 0) /* Deal with wrap */
1486 p->yscroll += p->vrows;
1487 ops->var.xoffset = 0;
1488 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1489 ops->var.vmode |= FB_VMODE_YWRAP;
1490 ops->update_start(info);
1491 scrollback_max -= count;
1492 if (scrollback_max < 0)
1493 scrollback_max = 0;
1494 scrollback_current = 0;
1495 }
1496
1497 static __inline__ void ypan_up(struct vc_data *vc, int count)
1498 {
1499 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1500 struct display *p = &fb_display[vc->vc_num];
1501 struct fbcon_ops *ops = info->fbcon_par;
1502
1503 p->yscroll += count;
1504 if (p->yscroll > p->vrows - vc->vc_rows) {
1505 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1506 0, 0, 0, vc->vc_rows, vc->vc_cols);
1507 p->yscroll -= p->vrows - vc->vc_rows;
1508 }
1509
1510 ops->var.xoffset = 0;
1511 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1512 ops->var.vmode &= ~FB_VMODE_YWRAP;
1513 ops->update_start(info);
1514 fbcon_clear_margins(vc, 1);
1515 scrollback_max += count;
1516 if (scrollback_max > scrollback_phys_max)
1517 scrollback_max = scrollback_phys_max;
1518 scrollback_current = 0;
1519 }
1520
1521 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1522 {
1523 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1524 struct fbcon_ops *ops = info->fbcon_par;
1525 struct display *p = &fb_display[vc->vc_num];
1526
1527 p->yscroll += count;
1528
1529 if (p->yscroll > p->vrows - vc->vc_rows) {
1530 p->yscroll -= p->vrows - vc->vc_rows;
1531 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1532 }
1533
1534 ops->var.xoffset = 0;
1535 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1536 ops->var.vmode &= ~FB_VMODE_YWRAP;
1537 ops->update_start(info);
1538 fbcon_clear_margins(vc, 1);
1539 scrollback_max += count;
1540 if (scrollback_max > scrollback_phys_max)
1541 scrollback_max = scrollback_phys_max;
1542 scrollback_current = 0;
1543 }
1544
1545 static __inline__ void ypan_down(struct vc_data *vc, int count)
1546 {
1547 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1548 struct display *p = &fb_display[vc->vc_num];
1549 struct fbcon_ops *ops = info->fbcon_par;
1550
1551 p->yscroll -= count;
1552 if (p->yscroll < 0) {
1553 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1554 0, vc->vc_rows, vc->vc_cols);
1555 p->yscroll += p->vrows - vc->vc_rows;
1556 }
1557
1558 ops->var.xoffset = 0;
1559 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1560 ops->var.vmode &= ~FB_VMODE_YWRAP;
1561 ops->update_start(info);
1562 fbcon_clear_margins(vc, 1);
1563 scrollback_max -= count;
1564 if (scrollback_max < 0)
1565 scrollback_max = 0;
1566 scrollback_current = 0;
1567 }
1568
1569 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1570 {
1571 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1572 struct fbcon_ops *ops = info->fbcon_par;
1573 struct display *p = &fb_display[vc->vc_num];
1574
1575 p->yscroll -= count;
1576
1577 if (p->yscroll < 0) {
1578 p->yscroll += p->vrows - vc->vc_rows;
1579 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1580 }
1581
1582 ops->var.xoffset = 0;
1583 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1584 ops->var.vmode &= ~FB_VMODE_YWRAP;
1585 ops->update_start(info);
1586 fbcon_clear_margins(vc, 1);
1587 scrollback_max -= count;
1588 if (scrollback_max < 0)
1589 scrollback_max = 0;
1590 scrollback_current = 0;
1591 }
1592
1593 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1594 long delta)
1595 {
1596 int count = vc->vc_rows;
1597 unsigned short *d, *s;
1598 unsigned long n;
1599 int line = 0;
1600
1601 d = (u16 *) softback_curr;
1602 if (d == (u16 *) softback_in)
1603 d = (u16 *) vc->vc_origin;
1604 n = softback_curr + delta * vc->vc_size_row;
1605 softback_lines -= delta;
1606 if (delta < 0) {
1607 if (softback_curr < softback_top && n < softback_buf) {
1608 n += softback_end - softback_buf;
1609 if (n < softback_top) {
1610 softback_lines -=
1611 (softback_top - n) / vc->vc_size_row;
1612 n = softback_top;
1613 }
1614 } else if (softback_curr >= softback_top
1615 && n < softback_top) {
1616 softback_lines -=
1617 (softback_top - n) / vc->vc_size_row;
1618 n = softback_top;
1619 }
1620 } else {
1621 if (softback_curr > softback_in && n >= softback_end) {
1622 n += softback_buf - softback_end;
1623 if (n > softback_in) {
1624 n = softback_in;
1625 softback_lines = 0;
1626 }
1627 } else if (softback_curr <= softback_in && n > softback_in) {
1628 n = softback_in;
1629 softback_lines = 0;
1630 }
1631 }
1632 if (n == softback_curr)
1633 return;
1634 softback_curr = n;
1635 s = (u16 *) softback_curr;
1636 if (s == (u16 *) softback_in)
1637 s = (u16 *) vc->vc_origin;
1638 while (count--) {
1639 unsigned short *start;
1640 unsigned short *le;
1641 unsigned short c;
1642 int x = 0;
1643 unsigned short attr = 1;
1644
1645 start = s;
1646 le = advance_row(s, 1);
1647 do {
1648 c = scr_readw(s);
1649 if (attr != (c & 0xff00)) {
1650 attr = c & 0xff00;
1651 if (s > start) {
1652 fbcon_putcs(vc, start, s - start,
1653 line, x);
1654 x += s - start;
1655 start = s;
1656 }
1657 }
1658 if (c == scr_readw(d)) {
1659 if (s > start) {
1660 fbcon_putcs(vc, start, s - start,
1661 line, x);
1662 x += s - start + 1;
1663 start = s + 1;
1664 } else {
1665 x++;
1666 start++;
1667 }
1668 }
1669 s++;
1670 d++;
1671 } while (s < le);
1672 if (s > start)
1673 fbcon_putcs(vc, start, s - start, line, x);
1674 line++;
1675 if (d == (u16 *) softback_end)
1676 d = (u16 *) softback_buf;
1677 if (d == (u16 *) softback_in)
1678 d = (u16 *) vc->vc_origin;
1679 if (s == (u16 *) softback_end)
1680 s = (u16 *) softback_buf;
1681 if (s == (u16 *) softback_in)
1682 s = (u16 *) vc->vc_origin;
1683 }
1684 }
1685
1686 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1687 int line, int count, int dy)
1688 {
1689 unsigned short *s = (unsigned short *)
1690 (vc->vc_origin + vc->vc_size_row * line);
1691
1692 while (count--) {
1693 unsigned short *start = s;
1694 unsigned short *le = advance_row(s, 1);
1695 unsigned short c;
1696 int x = 0;
1697 unsigned short attr = 1;
1698
1699 do {
1700 c = scr_readw(s);
1701 if (attr != (c & 0xff00)) {
1702 attr = c & 0xff00;
1703 if (s > start) {
1704 fbcon_putcs(vc, start, s - start,
1705 dy, x);
1706 x += s - start;
1707 start = s;
1708 }
1709 }
1710 console_conditional_schedule();
1711 s++;
1712 } while (s < le);
1713 if (s > start)
1714 fbcon_putcs(vc, start, s - start, dy, x);
1715 console_conditional_schedule();
1716 dy++;
1717 }
1718 }
1719
1720 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1721 struct display *p, int line, int count, int ycount)
1722 {
1723 int offset = ycount * vc->vc_cols;
1724 unsigned short *d = (unsigned short *)
1725 (vc->vc_origin + vc->vc_size_row * line);
1726 unsigned short *s = d + offset;
1727 struct fbcon_ops *ops = info->fbcon_par;
1728
1729 while (count--) {
1730 unsigned short *start = s;
1731 unsigned short *le = advance_row(s, 1);
1732 unsigned short c;
1733 int x = 0;
1734
1735 do {
1736 c = scr_readw(s);
1737
1738 if (c == scr_readw(d)) {
1739 if (s > start) {
1740 ops->bmove(vc, info, line + ycount, x,
1741 line, x, 1, s-start);
1742 x += s - start + 1;
1743 start = s + 1;
1744 } else {
1745 x++;
1746 start++;
1747 }
1748 }
1749
1750 scr_writew(c, d);
1751 console_conditional_schedule();
1752 s++;
1753 d++;
1754 } while (s < le);
1755 if (s > start)
1756 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1757 s-start);
1758 console_conditional_schedule();
1759 if (ycount > 0)
1760 line++;
1761 else {
1762 line--;
1763 /* NOTE: We subtract two lines from these pointers */
1764 s -= vc->vc_size_row;
1765 d -= vc->vc_size_row;
1766 }
1767 }
1768 }
1769
1770 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1771 int line, int count, int offset)
1772 {
1773 unsigned short *d = (unsigned short *)
1774 (vc->vc_origin + vc->vc_size_row * line);
1775 unsigned short *s = d + offset;
1776
1777 while (count--) {
1778 unsigned short *start = s;
1779 unsigned short *le = advance_row(s, 1);
1780 unsigned short c;
1781 int x = 0;
1782 unsigned short attr = 1;
1783
1784 do {
1785 c = scr_readw(s);
1786 if (attr != (c & 0xff00)) {
1787 attr = c & 0xff00;
1788 if (s > start) {
1789 fbcon_putcs(vc, start, s - start,
1790 line, x);
1791 x += s - start;
1792 start = s;
1793 }
1794 }
1795 if (c == scr_readw(d)) {
1796 if (s > start) {
1797 fbcon_putcs(vc, start, s - start,
1798 line, x);
1799 x += s - start + 1;
1800 start = s + 1;
1801 } else {
1802 x++;
1803 start++;
1804 }
1805 }
1806 scr_writew(c, d);
1807 console_conditional_schedule();
1808 s++;
1809 d++;
1810 } while (s < le);
1811 if (s > start)
1812 fbcon_putcs(vc, start, s - start, line, x);
1813 console_conditional_schedule();
1814 if (offset > 0)
1815 line++;
1816 else {
1817 line--;
1818 /* NOTE: We subtract two lines from these pointers */
1819 s -= vc->vc_size_row;
1820 d -= vc->vc_size_row;
1821 }
1822 }
1823 }
1824
1825 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1826 int count)
1827 {
1828 unsigned short *p;
1829
1830 if (vc->vc_num != fg_console)
1831 return;
1832 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1833
1834 while (count) {
1835 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1836 count--;
1837 p = advance_row(p, 1);
1838 softback_in += vc->vc_size_row;
1839 if (softback_in == softback_end)
1840 softback_in = softback_buf;
1841 if (softback_in == softback_top) {
1842 softback_top += vc->vc_size_row;
1843 if (softback_top == softback_end)
1844 softback_top = softback_buf;
1845 }
1846 }
1847 softback_curr = softback_in;
1848 }
1849
1850 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1851 int count)
1852 {
1853 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1854 struct display *p = &fb_display[vc->vc_num];
1855 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1856 unsigned short saved_ec;
1857 int ret;
1858
1859 if (fbcon_is_inactive(vc, info))
1860 return -EINVAL;
1861
1862 fbcon_cursor(vc, CM_ERASE);
1863
1864 /*
1865 * ++Geert: Only use ywrap/ypan if the console is in text mode
1866 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1867 * whole screen (prevents flicker).
1868 */
1869
1870 saved_ec = vc->vc_video_erase_char;
1871 vc->vc_video_erase_char = vc->vc_scrl_erase_char;
1872
1873 ret = 0;
1874
1875 switch (dir) {
1876 case SM_UP:
1877 if (count > vc->vc_rows) /* Maximum realistic size */
1878 count = vc->vc_rows;
1879 if (softback_top)
1880 fbcon_softback_note(vc, t, count);
1881 if (logo_shown >= 0)
1882 goto redraw_up;
1883 switch (p->scrollmode) {
1884 case SCROLL_MOVE:
1885 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1886 count);
1887 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1888 scr_memsetw((unsigned short *) (vc->vc_origin +
1889 vc->vc_size_row *
1890 (b - count)),
1891 vc->vc_scrl_erase_char,
1892 vc->vc_size_row * count);
1893 ret = 1;
1894 break;
1895
1896 case SCROLL_WRAP_MOVE:
1897 if (b - t - count > 3 * vc->vc_rows >> 2) {
1898 if (t > 0)
1899 fbcon_bmove(vc, 0, 0, count, 0, t,
1900 vc->vc_cols);
1901 ywrap_up(vc, count);
1902 if (vc->vc_rows - b > 0)
1903 fbcon_bmove(vc, b - count, 0, b, 0,
1904 vc->vc_rows - b,
1905 vc->vc_cols);
1906 } else if (info->flags & FBINFO_READS_FAST)
1907 fbcon_bmove(vc, t + count, 0, t, 0,
1908 b - t - count, vc->vc_cols);
1909 else
1910 goto redraw_up;
1911 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1912 break;
1913
1914 case SCROLL_PAN_REDRAW:
1915 if ((p->yscroll + count <=
1916 2 * (p->vrows - vc->vc_rows))
1917 && ((!scroll_partial && (b - t == vc->vc_rows))
1918 || (scroll_partial
1919 && (b - t - count >
1920 3 * vc->vc_rows >> 2)))) {
1921 if (t > 0)
1922 fbcon_redraw_move(vc, p, 0, t, count);
1923 ypan_up_redraw(vc, t, count);
1924 if (vc->vc_rows - b > 0)
1925 fbcon_redraw_move(vc, p, b,
1926 vc->vc_rows - b, b);
1927 } else
1928 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1929 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1930 break;
1931
1932 case SCROLL_PAN_MOVE:
1933 if ((p->yscroll + count <=
1934 2 * (p->vrows - vc->vc_rows))
1935 && ((!scroll_partial && (b - t == vc->vc_rows))
1936 || (scroll_partial
1937 && (b - t - count >
1938 3 * vc->vc_rows >> 2)))) {
1939 if (t > 0)
1940 fbcon_bmove(vc, 0, 0, count, 0, t,
1941 vc->vc_cols);
1942 ypan_up(vc, count);
1943 if (vc->vc_rows - b > 0)
1944 fbcon_bmove(vc, b - count, 0, b, 0,
1945 vc->vc_rows - b,
1946 vc->vc_cols);
1947 } else if (info->flags & FBINFO_READS_FAST)
1948 fbcon_bmove(vc, t + count, 0, t, 0,
1949 b - t - count, vc->vc_cols);
1950 else
1951 goto redraw_up;
1952 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1953 break;
1954
1955 case SCROLL_REDRAW:
1956 redraw_up:
1957 fbcon_redraw(vc, p, t, b - t - count,
1958 count * vc->vc_cols);
1959 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1960 scr_memsetw((unsigned short *) (vc->vc_origin +
1961 vc->vc_size_row *
1962 (b - count)),
1963 vc->vc_scrl_erase_char,
1964 vc->vc_size_row * count);
1965 ret = 1;
1966 break;
1967 }
1968 break;
1969
1970 case SM_DOWN:
1971 if (count > vc->vc_rows) /* Maximum realistic size */
1972 count = vc->vc_rows;
1973 if (logo_shown >= 0)
1974 goto redraw_down;
1975 switch (p->scrollmode) {
1976 case SCROLL_MOVE:
1977 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1978 -count);
1979 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1980 scr_memsetw((unsigned short *) (vc->vc_origin +
1981 vc->vc_size_row *
1982 t),
1983 vc->vc_scrl_erase_char,
1984 vc->vc_size_row * count);
1985 ret = 1;
1986 break;
1987
1988 case SCROLL_WRAP_MOVE:
1989 if (b - t - count > 3 * vc->vc_rows >> 2) {
1990 if (vc->vc_rows - b > 0)
1991 fbcon_bmove(vc, b, 0, b - count, 0,
1992 vc->vc_rows - b,
1993 vc->vc_cols);
1994 ywrap_down(vc, count);
1995 if (t > 0)
1996 fbcon_bmove(vc, count, 0, 0, 0, t,
1997 vc->vc_cols);
1998 } else if (info->flags & FBINFO_READS_FAST)
1999 fbcon_bmove(vc, t, 0, t + count, 0,
2000 b - t - count, vc->vc_cols);
2001 else
2002 goto redraw_down;
2003 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2004 break;
2005
2006 case SCROLL_PAN_MOVE:
2007 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2008 && ((!scroll_partial && (b - t == vc->vc_rows))
2009 || (scroll_partial
2010 && (b - t - count >
2011 3 * vc->vc_rows >> 2)))) {
2012 if (vc->vc_rows - b > 0)
2013 fbcon_bmove(vc, b, 0, b - count, 0,
2014 vc->vc_rows - b,
2015 vc->vc_cols);
2016 ypan_down(vc, count);
2017 if (t > 0)
2018 fbcon_bmove(vc, count, 0, 0, 0, t,
2019 vc->vc_cols);
2020 } else if (info->flags & FBINFO_READS_FAST)
2021 fbcon_bmove(vc, t, 0, t + count, 0,
2022 b - t - count, vc->vc_cols);
2023 else
2024 goto redraw_down;
2025 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2026 break;
2027
2028 case SCROLL_PAN_REDRAW:
2029 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2030 && ((!scroll_partial && (b - t == vc->vc_rows))
2031 || (scroll_partial
2032 && (b - t - count >
2033 3 * vc->vc_rows >> 2)))) {
2034 if (vc->vc_rows - b > 0)
2035 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2036 b - count);
2037 ypan_down_redraw(vc, t, count);
2038 if (t > 0)
2039 fbcon_redraw_move(vc, p, count, t, 0);
2040 } else
2041 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2042 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2043 break;
2044
2045 case SCROLL_REDRAW:
2046 redraw_down:
2047 fbcon_redraw(vc, p, b - 1, b - t - count,
2048 -count * vc->vc_cols);
2049 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2050 scr_memsetw((unsigned short *) (vc->vc_origin +
2051 vc->vc_size_row *
2052 t),
2053 vc->vc_scrl_erase_char,
2054 vc->vc_size_row * count);
2055 ret = 1;
2056 break;
2057 }
2058 break;
2059 }
2060 vc->vc_video_erase_char = saved_ec;
2061 return ret;
2062 }
2063
2064
2065 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2066 int height, int width)
2067 {
2068 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2069 struct display *p = &fb_display[vc->vc_num];
2070
2071 if (fbcon_is_inactive(vc, info))
2072 return;
2073
2074 if (!width || !height)
2075 return;
2076
2077 /* Split blits that cross physical y_wrap case.
2078 * Pathological case involves 4 blits, better to use recursive
2079 * code rather than unrolled case
2080 *
2081 * Recursive invocations don't need to erase the cursor over and
2082 * over again, so we use fbcon_bmove_rec()
2083 */
2084 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2085 p->vrows - p->yscroll);
2086 }
2087
2088 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2089 int dy, int dx, int height, int width, u_int y_break)
2090 {
2091 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2092 struct fbcon_ops *ops = info->fbcon_par;
2093 u_int b;
2094
2095 if (sy < y_break && sy + height > y_break) {
2096 b = y_break - sy;
2097 if (dy < sy) { /* Avoid trashing self */
2098 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2099 y_break);
2100 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2101 height - b, width, y_break);
2102 } else {
2103 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2104 height - b, width, y_break);
2105 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2106 y_break);
2107 }
2108 return;
2109 }
2110
2111 if (dy < y_break && dy + height > y_break) {
2112 b = y_break - dy;
2113 if (dy < sy) { /* Avoid trashing self */
2114 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2115 y_break);
2116 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2117 height - b, width, y_break);
2118 } else {
2119 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2120 height - b, width, y_break);
2121 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2122 y_break);
2123 }
2124 return;
2125 }
2126 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2127 height, width);
2128 }
2129
2130 static __inline__ void updatescrollmode(struct display *p,
2131 struct fb_info *info,
2132 struct vc_data *vc)
2133 {
2134 struct fbcon_ops *ops = info->fbcon_par;
2135 int fh = vc->vc_font.height;
2136 int cap = info->flags;
2137 u16 t = 0;
2138 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2139 info->fix.xpanstep);
2140 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2141 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2142 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2143 info->var.xres_virtual);
2144 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2145 divides(ypan, vc->vc_font.height) && vyres > yres;
2146 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2147 divides(ywrap, vc->vc_font.height) &&
2148 divides(vc->vc_font.height, vyres) &&
2149 divides(vc->vc_font.height, yres);
2150 int reading_fast = cap & FBINFO_READS_FAST;
2151 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2152 !(cap & FBINFO_HWACCEL_DISABLED);
2153 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2154 !(cap & FBINFO_HWACCEL_DISABLED);
2155
2156 p->vrows = vyres/fh;
2157 if (yres > (fh * (vc->vc_rows + 1)))
2158 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2159 if ((yres % fh) && (vyres % fh < yres % fh))
2160 p->vrows--;
2161
2162 if (good_wrap || good_pan) {
2163 if (reading_fast || fast_copyarea)
2164 p->scrollmode = good_wrap ?
2165 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2166 else
2167 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2168 SCROLL_PAN_REDRAW;
2169 } else {
2170 if (reading_fast || (fast_copyarea && !fast_imageblit))
2171 p->scrollmode = SCROLL_MOVE;
2172 else
2173 p->scrollmode = SCROLL_REDRAW;
2174 }
2175 }
2176
2177 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2178 unsigned int height, unsigned int user)
2179 {
2180 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2181 struct fbcon_ops *ops = info->fbcon_par;
2182 struct display *p = &fb_display[vc->vc_num];
2183 struct fb_var_screeninfo var = info->var;
2184 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2185
2186 virt_w = FBCON_SWAP(ops->rotate, width, height);
2187 virt_h = FBCON_SWAP(ops->rotate, height, width);
2188 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2189 vc->vc_font.height);
2190 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2191 vc->vc_font.width);
2192 var.xres = virt_w * virt_fw;
2193 var.yres = virt_h * virt_fh;
2194 x_diff = info->var.xres - var.xres;
2195 y_diff = info->var.yres - var.yres;
2196 if (x_diff < 0 || x_diff > virt_fw ||
2197 y_diff < 0 || y_diff > virt_fh) {
2198 const struct fb_videomode *mode;
2199
2200 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2201 mode = fb_find_best_mode(&var, &info->modelist);
2202 if (mode == NULL)
2203 return -EINVAL;
2204 display_to_var(&var, p);
2205 fb_videomode_to_var(&var, mode);
2206
2207 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2208 return -EINVAL;
2209
2210 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2211 if (CON_IS_VISIBLE(vc)) {
2212 var.activate = FB_ACTIVATE_NOW |
2213 FB_ACTIVATE_FORCE;
2214 fb_set_var(info, &var);
2215 }
2216 var_to_display(p, &info->var, info);
2217 ops->var = info->var;
2218 }
2219 updatescrollmode(p, info, vc);
2220 return 0;
2221 }
2222
2223 static int fbcon_switch(struct vc_data *vc)
2224 {
2225 struct fb_info *info, *old_info = NULL;
2226 struct fbcon_ops *ops;
2227 struct display *p = &fb_display[vc->vc_num];
2228 struct fb_var_screeninfo var;
2229 int i, prev_console, charcnt = 256;
2230
2231 info = registered_fb[con2fb_map[vc->vc_num]];
2232 ops = info->fbcon_par;
2233
2234 if (softback_top) {
2235 if (softback_lines)
2236 fbcon_set_origin(vc);
2237 softback_top = softback_curr = softback_in = softback_buf;
2238 softback_lines = 0;
2239 fbcon_update_softback(vc);
2240 }
2241
2242 if (logo_shown >= 0) {
2243 struct vc_data *conp2 = vc_cons[logo_shown].d;
2244
2245 if (conp2->vc_top == logo_lines
2246 && conp2->vc_bottom == conp2->vc_rows)
2247 conp2->vc_top = 0;
2248 logo_shown = FBCON_LOGO_CANSHOW;
2249 }
2250
2251 prev_console = ops->currcon;
2252 if (prev_console != -1)
2253 old_info = registered_fb[con2fb_map[prev_console]];
2254 /*
2255 * FIXME: If we have multiple fbdev's loaded, we need to
2256 * update all info->currcon. Perhaps, we can place this
2257 * in a centralized structure, but this might break some
2258 * drivers.
2259 *
2260 * info->currcon = vc->vc_num;
2261 */
2262 for (i = 0; i < FB_MAX; i++) {
2263 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2264 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2265
2266 o->currcon = vc->vc_num;
2267 }
2268 }
2269 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2270 display_to_var(&var, p);
2271 var.activate = FB_ACTIVATE_NOW;
2272
2273 /*
2274 * make sure we don't unnecessarily trip the memcmp()
2275 * in fb_set_var()
2276 */
2277 info->var.activate = var.activate;
2278 var.yoffset = info->var.yoffset;
2279 var.xoffset = info->var.xoffset;
2280 var.vmode = info->var.vmode;
2281 fb_set_var(info, &var);
2282 ops->var = info->var;
2283
2284 if (old_info != NULL && (old_info != info ||
2285 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2286 if (info->fbops->fb_set_par)
2287 info->fbops->fb_set_par(info);
2288
2289 if (old_info != info)
2290 fbcon_del_cursor_timer(old_info);
2291 }
2292
2293 if (fbcon_is_inactive(vc, info) ||
2294 ops->blank_state != FB_BLANK_UNBLANK)
2295 fbcon_del_cursor_timer(info);
2296 else
2297 fbcon_add_cursor_timer(info);
2298
2299 set_blitting_type(vc, info);
2300 ops->cursor_reset = 1;
2301
2302 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2303 ops->rotate = FB_ROTATE_UR;
2304 set_blitting_type(vc, info);
2305 }
2306
2307 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2308 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2309
2310 if (p->userfont)
2311 charcnt = FNTCHARCNT(vc->vc_font.data);
2312
2313 if (charcnt > 256)
2314 vc->vc_complement_mask <<= 1;
2315
2316 updatescrollmode(p, info, vc);
2317
2318 switch (p->scrollmode) {
2319 case SCROLL_WRAP_MOVE:
2320 scrollback_phys_max = p->vrows - vc->vc_rows;
2321 break;
2322 case SCROLL_PAN_MOVE:
2323 case SCROLL_PAN_REDRAW:
2324 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2325 if (scrollback_phys_max < 0)
2326 scrollback_phys_max = 0;
2327 break;
2328 default:
2329 scrollback_phys_max = 0;
2330 break;
2331 }
2332
2333 scrollback_max = 0;
2334 scrollback_current = 0;
2335
2336 if (!fbcon_is_inactive(vc, info)) {
2337 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2338 ops->update_start(info);
2339 }
2340
2341 fbcon_set_palette(vc, color_table);
2342 fbcon_clear_margins(vc, 0);
2343
2344 if (logo_shown == FBCON_LOGO_DRAW) {
2345
2346 logo_shown = fg_console;
2347 /* This is protected above by initmem_freed */
2348 fb_show_logo(info, ops->rotate);
2349 update_region(vc,
2350 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2351 vc->vc_size_row * (vc->vc_bottom -
2352 vc->vc_top) / 2);
2353 return 0;
2354 }
2355 return 1;
2356 }
2357
2358 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2359 int blank)
2360 {
2361 struct fb_event event;
2362
2363 if (blank) {
2364 unsigned short charmask = vc->vc_hi_font_mask ?
2365 0x1ff : 0xff;
2366 unsigned short oldc;
2367
2368 oldc = vc->vc_video_erase_char;
2369 vc->vc_video_erase_char &= charmask;
2370 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2371 vc->vc_video_erase_char = oldc;
2372 }
2373
2374
2375 event.info = info;
2376 event.data = &blank;
2377 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2378 }
2379
2380 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2381 {
2382 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2383 struct fbcon_ops *ops = info->fbcon_par;
2384
2385 if (mode_switch) {
2386 struct fb_var_screeninfo var = info->var;
2387
2388 ops->graphics = 1;
2389
2390 if (!blank) {
2391 if (info->fbops->fb_save_state)
2392 info->fbops->fb_save_state(info);
2393 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2394 fb_set_var(info, &var);
2395 ops->graphics = 0;
2396 ops->var = info->var;
2397 } else if (info->fbops->fb_restore_state)
2398 info->fbops->fb_restore_state(info);
2399 }
2400
2401 if (!fbcon_is_inactive(vc, info)) {
2402 if (ops->blank_state != blank) {
2403 ops->blank_state = blank;
2404 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2405 ops->cursor_flash = (!blank);
2406
2407 if (fb_blank(info, blank))
2408 fbcon_generic_blank(vc, info, blank);
2409 }
2410
2411 if (!blank)
2412 update_screen(vc);
2413 }
2414
2415 if (mode_switch || fbcon_is_inactive(vc, info) ||
2416 ops->blank_state != FB_BLANK_UNBLANK)
2417 fbcon_del_cursor_timer(info);
2418 else
2419 fbcon_add_cursor_timer(info);
2420
2421 return 0;
2422 }
2423
2424 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2425 {
2426 u8 *fontdata = vc->vc_font.data;
2427 u8 *data = font->data;
2428 int i, j;
2429
2430 font->width = vc->vc_font.width;
2431 font->height = vc->vc_font.height;
2432 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2433 if (!font->data)
2434 return 0;
2435
2436 if (font->width <= 8) {
2437 j = vc->vc_font.height;
2438 for (i = 0; i < font->charcount; i++) {
2439 memcpy(data, fontdata, j);
2440 memset(data + j, 0, 32 - j);
2441 data += 32;
2442 fontdata += j;
2443 }
2444 } else if (font->width <= 16) {
2445 j = vc->vc_font.height * 2;
2446 for (i = 0; i < font->charcount; i++) {
2447 memcpy(data, fontdata, j);
2448 memset(data + j, 0, 64 - j);
2449 data += 64;
2450 fontdata += j;
2451 }
2452 } else if (font->width <= 24) {
2453 for (i = 0; i < font->charcount; i++) {
2454 for (j = 0; j < vc->vc_font.height; j++) {
2455 *data++ = fontdata[0];
2456 *data++ = fontdata[1];
2457 *data++ = fontdata[2];
2458 fontdata += sizeof(u32);
2459 }
2460 memset(data, 0, 3 * (32 - j));
2461 data += 3 * (32 - j);
2462 }
2463 } else {
2464 j = vc->vc_font.height * 4;
2465 for (i = 0; i < font->charcount; i++) {
2466 memcpy(data, fontdata, j);
2467 memset(data + j, 0, 128 - j);
2468 data += 128;
2469 fontdata += j;
2470 }
2471 }
2472 return 0;
2473 }
2474
2475 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2476 const u8 * data, int userfont)
2477 {
2478 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2479 struct fbcon_ops *ops = info->fbcon_par;
2480 struct display *p = &fb_display[vc->vc_num];
2481 int resize;
2482 int cnt;
2483 char *old_data = NULL;
2484
2485 if (CON_IS_VISIBLE(vc) && softback_lines)
2486 fbcon_set_origin(vc);
2487
2488 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2489 if (p->userfont)
2490 old_data = vc->vc_font.data;
2491 if (userfont)
2492 cnt = FNTCHARCNT(data);
2493 else
2494 cnt = 256;
2495 vc->vc_font.data = (void *)(p->fontdata = data);
2496 if ((p->userfont = userfont))
2497 REFCOUNT(data)++;
2498 vc->vc_font.width = w;
2499 vc->vc_font.height = h;
2500 if (vc->vc_hi_font_mask && cnt == 256) {
2501 vc->vc_hi_font_mask = 0;
2502 if (vc->vc_can_do_color) {
2503 vc->vc_complement_mask >>= 1;
2504 vc->vc_s_complement_mask >>= 1;
2505 }
2506
2507 /* ++Edmund: reorder the attribute bits */
2508 if (vc->vc_can_do_color) {
2509 unsigned short *cp =
2510 (unsigned short *) vc->vc_origin;
2511 int count = vc->vc_screenbuf_size / 2;
2512 unsigned short c;
2513 for (; count > 0; count--, cp++) {
2514 c = scr_readw(cp);
2515 scr_writew(((c & 0xfe00) >> 1) |
2516 (c & 0xff), cp);
2517 }
2518 c = vc->vc_video_erase_char;
2519 vc->vc_video_erase_char =
2520 ((c & 0xfe00) >> 1) | (c & 0xff);
2521 c = vc->vc_def_color;
2522 vc->vc_scrl_erase_char =
2523 ((c & 0xFE00) >> 1) | (c & 0xFF);
2524 vc->vc_attr >>= 1;
2525 }
2526 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2527 vc->vc_hi_font_mask = 0x100;
2528 if (vc->vc_can_do_color) {
2529 vc->vc_complement_mask <<= 1;
2530 vc->vc_s_complement_mask <<= 1;
2531 }
2532
2533 /* ++Edmund: reorder the attribute bits */
2534 {
2535 unsigned short *cp =
2536 (unsigned short *) vc->vc_origin;
2537 int count = vc->vc_screenbuf_size / 2;
2538 unsigned short c;
2539 for (; count > 0; count--, cp++) {
2540 unsigned short newc;
2541 c = scr_readw(cp);
2542 if (vc->vc_can_do_color)
2543 newc =
2544 ((c & 0xff00) << 1) | (c &
2545 0xff);
2546 else
2547 newc = c & ~0x100;
2548 scr_writew(newc, cp);
2549 }
2550 c = vc->vc_video_erase_char;
2551 if (vc->vc_can_do_color) {
2552 vc->vc_video_erase_char =
2553 ((c & 0xff00) << 1) | (c & 0xff);
2554 c = vc->vc_def_color;
2555 vc->vc_scrl_erase_char =
2556 ((c & 0xFF00) << 1) | (c & 0xFF);
2557 vc->vc_attr <<= 1;
2558 } else {
2559 vc->vc_video_erase_char = c & ~0x100;
2560 vc->vc_scrl_erase_char = c & ~0x100;
2561 }
2562 }
2563
2564 }
2565
2566 if (resize) {
2567 int cols, rows;
2568
2569 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2570 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2571 cols /= w;
2572 rows /= h;
2573 vc_resize(vc, cols, rows);
2574 if (CON_IS_VISIBLE(vc) && softback_buf)
2575 fbcon_update_softback(vc);
2576 } else if (CON_IS_VISIBLE(vc)
2577 && vc->vc_mode == KD_TEXT) {
2578 fbcon_clear_margins(vc, 0);
2579 update_screen(vc);
2580 }
2581
2582 if (old_data && (--REFCOUNT(old_data) == 0))
2583 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2584 return 0;
2585 }
2586
2587 static int fbcon_copy_font(struct vc_data *vc, int con)
2588 {
2589 struct display *od = &fb_display[con];
2590 struct console_font *f = &vc->vc_font;
2591
2592 if (od->fontdata == f->data)
2593 return 0; /* already the same font... */
2594 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2595 }
2596
2597 /*
2598 * User asked to set font; we are guaranteed that
2599 * a) width and height are in range 1..32
2600 * b) charcount does not exceed 512
2601 * but lets not assume that, since someone might someday want to use larger
2602 * fonts. And charcount of 512 is small for unicode support.
2603 *
2604 * However, user space gives the font in 32 rows , regardless of
2605 * actual font height. So a new API is needed if support for larger fonts
2606 * is ever implemented.
2607 */
2608
2609 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2610 {
2611 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2612 unsigned charcount = font->charcount;
2613 int w = font->width;
2614 int h = font->height;
2615 int size;
2616 int i, csum;
2617 u8 *new_data, *data = font->data;
2618 int pitch = (font->width+7) >> 3;
2619
2620 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2621 * If not this check should be changed to charcount < 256 */
2622 if (charcount != 256 && charcount != 512)
2623 return -EINVAL;
2624
2625 /* Make sure drawing engine can handle the font */
2626 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2627 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2628 return -EINVAL;
2629
2630 /* Make sure driver can handle the font length */
2631 if (fbcon_invalid_charcount(info, charcount))
2632 return -EINVAL;
2633
2634 size = h * pitch * charcount;
2635
2636 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2637
2638 if (!new_data)
2639 return -ENOMEM;
2640
2641 new_data += FONT_EXTRA_WORDS * sizeof(int);
2642 FNTSIZE(new_data) = size;
2643 FNTCHARCNT(new_data) = charcount;
2644 REFCOUNT(new_data) = 0; /* usage counter */
2645 for (i=0; i< charcount; i++) {
2646 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2647 }
2648
2649 /* Since linux has a nice crc32 function use it for counting font
2650 * checksums. */
2651 csum = crc32(0, new_data, size);
2652
2653 FNTSUM(new_data) = csum;
2654 /* Check if the same font is on some other console already */
2655 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2656 struct vc_data *tmp = vc_cons[i].d;
2657
2658 if (fb_display[i].userfont &&
2659 fb_display[i].fontdata &&
2660 FNTSUM(fb_display[i].fontdata) == csum &&
2661 FNTSIZE(fb_display[i].fontdata) == size &&
2662 tmp->vc_font.width == w &&
2663 !memcmp(fb_display[i].fontdata, new_data, size)) {
2664 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2665 new_data = (u8 *)fb_display[i].fontdata;
2666 break;
2667 }
2668 }
2669 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2670 }
2671
2672 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2673 {
2674 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2675 const struct font_desc *f;
2676
2677 if (!name)
2678 f = get_default_font(info->var.xres, info->var.yres,
2679 info->pixmap.blit_x, info->pixmap.blit_y);
2680 else if (!(f = find_font(name)))
2681 return -ENOENT;
2682
2683 font->width = f->width;
2684 font->height = f->height;
2685 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2686 }
2687
2688 static u16 palette_red[16];
2689 static u16 palette_green[16];
2690 static u16 palette_blue[16];
2691
2692 static struct fb_cmap palette_cmap = {
2693 0, 16, palette_red, palette_green, palette_blue, NULL
2694 };
2695
2696 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2697 {
2698 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2699 int i, j, k, depth;
2700 u8 val;
2701
2702 if (fbcon_is_inactive(vc, info))
2703 return -EINVAL;
2704
2705 if (!CON_IS_VISIBLE(vc))
2706 return 0;
2707
2708 depth = fb_get_color_depth(&info->var, &info->fix);
2709 if (depth > 3) {
2710 for (i = j = 0; i < 16; i++) {
2711 k = table[i];
2712 val = vc->vc_palette[j++];
2713 palette_red[k] = (val << 8) | val;
2714 val = vc->vc_palette[j++];
2715 palette_green[k] = (val << 8) | val;
2716 val = vc->vc_palette[j++];
2717 palette_blue[k] = (val << 8) | val;
2718 }
2719 palette_cmap.len = 16;
2720 palette_cmap.start = 0;
2721 /*
2722 * If framebuffer is capable of less than 16 colors,
2723 * use default palette of fbcon.
2724 */
2725 } else
2726 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2727
2728 return fb_set_cmap(&palette_cmap, info);
2729 }
2730
2731 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2732 {
2733 unsigned long p;
2734 int line;
2735
2736 if (vc->vc_num != fg_console || !softback_lines)
2737 return (u16 *) (vc->vc_origin + offset);
2738 line = offset / vc->vc_size_row;
2739 if (line >= softback_lines)
2740 return (u16 *) (vc->vc_origin + offset -
2741 softback_lines * vc->vc_size_row);
2742 p = softback_curr + offset;
2743 if (p >= softback_end)
2744 p += softback_buf - softback_end;
2745 return (u16 *) p;
2746 }
2747
2748 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2749 int *px, int *py)
2750 {
2751 unsigned long ret;
2752 int x, y;
2753
2754 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2755 unsigned long offset = (pos - vc->vc_origin) / 2;
2756
2757 x = offset % vc->vc_cols;
2758 y = offset / vc->vc_cols;
2759 if (vc->vc_num == fg_console)
2760 y += softback_lines;
2761 ret = pos + (vc->vc_cols - x) * 2;
2762 } else if (vc->vc_num == fg_console && softback_lines) {
2763 unsigned long offset = pos - softback_curr;
2764
2765 if (pos < softback_curr)
2766 offset += softback_end - softback_buf;
2767 offset /= 2;
2768 x = offset % vc->vc_cols;
2769 y = offset / vc->vc_cols;
2770 ret = pos + (vc->vc_cols - x) * 2;
2771 if (ret == softback_end)
2772 ret = softback_buf;
2773 if (ret == softback_in)
2774 ret = vc->vc_origin;
2775 } else {
2776 /* Should not happen */
2777 x = y = 0;
2778 ret = vc->vc_origin;
2779 }
2780 if (px)
2781 *px = x;
2782 if (py)
2783 *py = y;
2784 return ret;
2785 }
2786
2787 /* As we might be inside of softback, we may work with non-contiguous buffer,
2788 that's why we have to use a separate routine. */
2789 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2790 {
2791 while (cnt--) {
2792 u16 a = scr_readw(p);
2793 if (!vc->vc_can_do_color)
2794 a ^= 0x0800;
2795 else if (vc->vc_hi_font_mask == 0x100)
2796 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2797 (((a) & 0x0e00) << 4);
2798 else
2799 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2800 (((a) & 0x0700) << 4);
2801 scr_writew(a, p++);
2802 if (p == (u16 *) softback_end)
2803 p = (u16 *) softback_buf;
2804 if (p == (u16 *) softback_in)
2805 p = (u16 *) vc->vc_origin;
2806 }
2807 }
2808
2809 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2810 {
2811 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2812 struct fbcon_ops *ops = info->fbcon_par;
2813 struct display *disp = &fb_display[fg_console];
2814 int offset, limit, scrollback_old;
2815
2816 if (softback_top) {
2817 if (vc->vc_num != fg_console)
2818 return 0;
2819 if (vc->vc_mode != KD_TEXT || !lines)
2820 return 0;
2821 if (logo_shown >= 0) {
2822 struct vc_data *conp2 = vc_cons[logo_shown].d;
2823
2824 if (conp2->vc_top == logo_lines
2825 && conp2->vc_bottom == conp2->vc_rows)
2826 conp2->vc_top = 0;
2827 if (logo_shown == vc->vc_num) {
2828 unsigned long p, q;
2829 int i;
2830
2831 p = softback_in;
2832 q = vc->vc_origin +
2833 logo_lines * vc->vc_size_row;
2834 for (i = 0; i < logo_lines; i++) {
2835 if (p == softback_top)
2836 break;
2837 if (p == softback_buf)
2838 p = softback_end;
2839 p -= vc->vc_size_row;
2840 q -= vc->vc_size_row;
2841 scr_memcpyw((u16 *) q, (u16 *) p,
2842 vc->vc_size_row);
2843 }
2844 softback_in = softback_curr = p;
2845 update_region(vc, vc->vc_origin,
2846 logo_lines * vc->vc_cols);
2847 }
2848 logo_shown = FBCON_LOGO_CANSHOW;
2849 }
2850 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2851 fbcon_redraw_softback(vc, disp, lines);
2852 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2853 return 0;
2854 }
2855
2856 if (!scrollback_phys_max)
2857 return -ENOSYS;
2858
2859 scrollback_old = scrollback_current;
2860 scrollback_current -= lines;
2861 if (scrollback_current < 0)
2862 scrollback_current = 0;
2863 else if (scrollback_current > scrollback_max)
2864 scrollback_current = scrollback_max;
2865 if (scrollback_current == scrollback_old)
2866 return 0;
2867
2868 if (fbcon_is_inactive(vc, info))
2869 return 0;
2870
2871 fbcon_cursor(vc, CM_ERASE);
2872
2873 offset = disp->yscroll - scrollback_current;
2874 limit = disp->vrows;
2875 switch (disp->scrollmode) {
2876 case SCROLL_WRAP_MOVE:
2877 info->var.vmode |= FB_VMODE_YWRAP;
2878 break;
2879 case SCROLL_PAN_MOVE:
2880 case SCROLL_PAN_REDRAW:
2881 limit -= vc->vc_rows;
2882 info->var.vmode &= ~FB_VMODE_YWRAP;
2883 break;
2884 }
2885 if (offset < 0)
2886 offset += limit;
2887 else if (offset >= limit)
2888 offset -= limit;
2889
2890 ops->var.xoffset = 0;
2891 ops->var.yoffset = offset * vc->vc_font.height;
2892 ops->update_start(info);
2893
2894 if (!scrollback_current)
2895 fbcon_cursor(vc, CM_DRAW);
2896 return 0;
2897 }
2898
2899 static int fbcon_set_origin(struct vc_data *vc)
2900 {
2901 if (softback_lines)
2902 fbcon_scrolldelta(vc, softback_lines);
2903 return 0;
2904 }
2905
2906 static void fbcon_suspended(struct fb_info *info)
2907 {
2908 struct vc_data *vc = NULL;
2909 struct fbcon_ops *ops = info->fbcon_par;
2910
2911 if (!ops || ops->currcon < 0)
2912 return;
2913 vc = vc_cons[ops->currcon].d;
2914
2915 /* Clear cursor, restore saved data */
2916 fbcon_cursor(vc, CM_ERASE);
2917 }
2918
2919 static void fbcon_resumed(struct fb_info *info)
2920 {
2921 struct vc_data *vc;
2922 struct fbcon_ops *ops = info->fbcon_par;
2923
2924 if (!ops || ops->currcon < 0)
2925 return;
2926 vc = vc_cons[ops->currcon].d;
2927
2928 update_screen(vc);
2929 }
2930
2931 static void fbcon_modechanged(struct fb_info *info)
2932 {
2933 struct fbcon_ops *ops = info->fbcon_par;
2934 struct vc_data *vc;
2935 struct display *p;
2936 int rows, cols;
2937
2938 if (!ops || ops->currcon < 0)
2939 return;
2940 vc = vc_cons[ops->currcon].d;
2941 if (vc->vc_mode != KD_TEXT ||
2942 registered_fb[con2fb_map[ops->currcon]] != info)
2943 return;
2944
2945 p = &fb_display[vc->vc_num];
2946 set_blitting_type(vc, info);
2947
2948 if (CON_IS_VISIBLE(vc)) {
2949 var_to_display(p, &info->var, info);
2950 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2951 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2952 cols /= vc->vc_font.width;
2953 rows /= vc->vc_font.height;
2954 vc_resize(vc, cols, rows);
2955 updatescrollmode(p, info, vc);
2956 scrollback_max = 0;
2957 scrollback_current = 0;
2958
2959 if (!fbcon_is_inactive(vc, info)) {
2960 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2961 ops->update_start(info);
2962 }
2963
2964 fbcon_set_palette(vc, color_table);
2965 update_screen(vc);
2966 if (softback_buf)
2967 fbcon_update_softback(vc);
2968 }
2969 }
2970
2971 static void fbcon_set_all_vcs(struct fb_info *info)
2972 {
2973 struct fbcon_ops *ops = info->fbcon_par;
2974 struct vc_data *vc;
2975 struct display *p;
2976 int i, rows, cols, fg = -1;
2977
2978 if (!ops || ops->currcon < 0)
2979 return;
2980
2981 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2982 vc = vc_cons[i].d;
2983 if (!vc || vc->vc_mode != KD_TEXT ||
2984 registered_fb[con2fb_map[i]] != info)
2985 continue;
2986
2987 if (CON_IS_VISIBLE(vc)) {
2988 fg = i;
2989 continue;
2990 }
2991
2992 p = &fb_display[vc->vc_num];
2993 set_blitting_type(vc, info);
2994 var_to_display(p, &info->var, info);
2995 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2996 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2997 cols /= vc->vc_font.width;
2998 rows /= vc->vc_font.height;
2999 vc_resize(vc, cols, rows);
3000 }
3001
3002 if (fg != -1)
3003 fbcon_modechanged(info);
3004 }
3005
3006 static int fbcon_mode_deleted(struct fb_info *info,
3007 struct fb_videomode *mode)
3008 {
3009 struct fb_info *fb_info;
3010 struct display *p;
3011 int i, j, found = 0;
3012
3013 /* before deletion, ensure that mode is not in use */
3014 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3015 j = con2fb_map[i];
3016 if (j == -1)
3017 continue;
3018 fb_info = registered_fb[j];
3019 if (fb_info != info)
3020 continue;
3021 p = &fb_display[i];
3022 if (!p || !p->mode)
3023 continue;
3024 if (fb_mode_is_equal(p->mode, mode)) {
3025 found = 1;
3026 break;
3027 }
3028 }
3029 return found;
3030 }
3031
3032 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3033 static int fbcon_unbind(void)
3034 {
3035 int ret;
3036
3037 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3038 fbcon_is_default);
3039 return ret;
3040 }
3041 #else
3042 static inline int fbcon_unbind(void)
3043 {
3044 return -EINVAL;
3045 }
3046 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3047
3048 static int fbcon_fb_unbind(int idx)
3049 {
3050 int i, new_idx = -1, ret = 0;
3051
3052 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3053 if (con2fb_map[i] != idx &&
3054 con2fb_map[i] != -1) {
3055 new_idx = i;
3056 break;
3057 }
3058 }
3059
3060 if (new_idx != -1) {
3061 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3062 if (con2fb_map[i] == idx)
3063 set_con2fb_map(i, new_idx, 0);
3064 }
3065 } else
3066 ret = fbcon_unbind();
3067
3068 return ret;
3069 }
3070
3071 static int fbcon_fb_unregistered(struct fb_info *info)
3072 {
3073 int i, idx = info->node;
3074
3075 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3076 if (con2fb_map[i] == idx)
3077 con2fb_map[i] = -1;
3078 }
3079
3080 if (idx == info_idx) {
3081 info_idx = -1;
3082
3083 for (i = 0; i < FB_MAX; i++) {
3084 if (registered_fb[i] != NULL) {
3085 info_idx = i;
3086 break;
3087 }
3088 }
3089 }
3090
3091 if (info_idx != -1) {
3092 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3093 if (con2fb_map[i] == -1)
3094 con2fb_map[i] = info_idx;
3095 }
3096 }
3097
3098 if (!num_registered_fb)
3099 unregister_con_driver(&fb_con);
3100
3101
3102 if (primary_device == idx)
3103 primary_device = -1;
3104
3105 return 0;
3106 }
3107
3108 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3109 static void fbcon_select_primary(struct fb_info *info)
3110 {
3111 if (!map_override && primary_device == -1 &&
3112 fb_is_primary_device(info)) {
3113 int i;
3114
3115 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3116 info->fix.id, info->node);
3117 primary_device = info->node;
3118
3119 for (i = first_fb_vc; i <= last_fb_vc; i++)
3120 con2fb_map_boot[i] = primary_device;
3121
3122 if (con_is_bound(&fb_con)) {
3123 printk(KERN_INFO "fbcon: Remapping primary device, "
3124 "fb%i, to tty %i-%i\n", info->node,
3125 first_fb_vc + 1, last_fb_vc + 1);
3126 info_idx = primary_device;
3127 }
3128 }
3129
3130 }
3131 #else
3132 static inline void fbcon_select_primary(struct fb_info *info)
3133 {
3134 return;
3135 }
3136 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3137
3138 static int fbcon_fb_registered(struct fb_info *info)
3139 {
3140 int ret = 0, i, idx = info->node;
3141
3142 fbcon_select_primary(info);
3143
3144 if (info_idx == -1) {
3145 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3146 if (con2fb_map_boot[i] == idx) {
3147 info_idx = idx;
3148 break;
3149 }
3150 }
3151
3152 if (info_idx != -1)
3153 ret = fbcon_takeover(1);
3154 } else {
3155 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3156 if (con2fb_map_boot[i] == idx)
3157 set_con2fb_map(i, idx, 0);
3158 }
3159 }
3160
3161 return ret;
3162 }
3163
3164 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3165 {
3166 struct fbcon_ops *ops = info->fbcon_par;
3167 struct vc_data *vc;
3168
3169 if (!ops || ops->currcon < 0)
3170 return;
3171
3172 vc = vc_cons[ops->currcon].d;
3173 if (vc->vc_mode != KD_TEXT ||
3174 registered_fb[con2fb_map[ops->currcon]] != info)
3175 return;
3176
3177 if (CON_IS_VISIBLE(vc)) {
3178 if (blank)
3179 do_blank_screen(0);
3180 else
3181 do_unblank_screen(0);
3182 }
3183 ops->blank_state = blank;
3184 }
3185
3186 static void fbcon_new_modelist(struct fb_info *info)
3187 {
3188 int i;
3189 struct vc_data *vc;
3190 struct fb_var_screeninfo var;
3191 const struct fb_videomode *mode;
3192
3193 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3194 if (registered_fb[con2fb_map[i]] != info)
3195 continue;
3196 if (!fb_display[i].mode)
3197 continue;
3198 vc = vc_cons[i].d;
3199 display_to_var(&var, &fb_display[i]);
3200 mode = fb_find_nearest_mode(fb_display[i].mode,
3201 &info->modelist);
3202 fb_videomode_to_var(&var, mode);
3203 fbcon_set_disp(info, &var, vc->vc_num);
3204 }
3205 }
3206
3207 static void fbcon_get_requirement(struct fb_info *info,
3208 struct fb_blit_caps *caps)
3209 {
3210 struct vc_data *vc;
3211 struct display *p;
3212
3213 if (caps->flags) {
3214 int i, charcnt;
3215
3216 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3217 vc = vc_cons[i].d;
3218 if (vc && vc->vc_mode == KD_TEXT &&
3219 info->node == con2fb_map[i]) {
3220 p = &fb_display[i];
3221 caps->x |= 1 << (vc->vc_font.width - 1);
3222 caps->y |= 1 << (vc->vc_font.height - 1);
3223 charcnt = (p->userfont) ?
3224 FNTCHARCNT(p->fontdata) : 256;
3225 if (caps->len < charcnt)
3226 caps->len = charcnt;
3227 }
3228 }
3229 } else {
3230 vc = vc_cons[fg_console].d;
3231
3232 if (vc && vc->vc_mode == KD_TEXT &&
3233 info->node == con2fb_map[fg_console]) {
3234 p = &fb_display[fg_console];
3235 caps->x = 1 << (vc->vc_font.width - 1);
3236 caps->y = 1 << (vc->vc_font.height - 1);
3237 caps->len = (p->userfont) ?
3238 FNTCHARCNT(p->fontdata) : 256;
3239 }
3240 }
3241 }
3242
3243 static int fbcon_event_notify(struct notifier_block *self,
3244 unsigned long action, void *data)
3245 {
3246 struct fb_event *event = data;
3247 struct fb_info *info = event->info;
3248 struct fb_videomode *mode;
3249 struct fb_con2fbmap *con2fb;
3250 struct fb_blit_caps *caps;
3251 int ret = 0;
3252
3253 /*
3254 * ignore all events except driver registration and deregistration
3255 * if fbcon is not active
3256 */
3257 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3258 action == FB_EVENT_FB_UNREGISTERED))
3259 goto done;
3260
3261 switch(action) {
3262 case FB_EVENT_SUSPEND:
3263 fbcon_suspended(info);
3264 break;
3265 case FB_EVENT_RESUME:
3266 fbcon_resumed(info);
3267 break;
3268 case FB_EVENT_MODE_CHANGE:
3269 fbcon_modechanged(info);
3270 break;
3271 case FB_EVENT_MODE_CHANGE_ALL:
3272 fbcon_set_all_vcs(info);
3273 break;
3274 case FB_EVENT_MODE_DELETE:
3275 mode = event->data;
3276 ret = fbcon_mode_deleted(info, mode);
3277 break;
3278 case FB_EVENT_FB_UNBIND:
3279 ret = fbcon_fb_unbind(info->node);
3280 break;
3281 case FB_EVENT_FB_REGISTERED:
3282 ret = fbcon_fb_registered(info);
3283 break;
3284 case FB_EVENT_FB_UNREGISTERED:
3285 ret = fbcon_fb_unregistered(info);
3286 break;
3287 case FB_EVENT_SET_CONSOLE_MAP:
3288 con2fb = event->data;
3289 ret = set_con2fb_map(con2fb->console - 1,
3290 con2fb->framebuffer, 1);
3291 break;
3292 case FB_EVENT_GET_CONSOLE_MAP:
3293 con2fb = event->data;
3294 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3295 break;
3296 case FB_EVENT_BLANK:
3297 fbcon_fb_blanked(info, *(int *)event->data);
3298 break;
3299 case FB_EVENT_NEW_MODELIST:
3300 fbcon_new_modelist(info);
3301 break;
3302 case FB_EVENT_GET_REQ:
3303 caps = event->data;
3304 fbcon_get_requirement(info, caps);
3305 break;
3306 }
3307
3308 done:
3309 return ret;
3310 }
3311
3312 /*
3313 * The console `switch' structure for the frame buffer based console
3314 */
3315
3316 static const struct consw fb_con = {
3317 .owner = THIS_MODULE,
3318 .con_startup = fbcon_startup,
3319 .con_init = fbcon_init,
3320 .con_deinit = fbcon_deinit,
3321 .con_clear = fbcon_clear,
3322 .con_putc = fbcon_putc,
3323 .con_putcs = fbcon_putcs,
3324 .con_cursor = fbcon_cursor,
3325 .con_scroll = fbcon_scroll,
3326 .con_bmove = fbcon_bmove,
3327 .con_switch = fbcon_switch,
3328 .con_blank = fbcon_blank,
3329 .con_font_set = fbcon_set_font,
3330 .con_font_get = fbcon_get_font,
3331 .con_font_default = fbcon_set_def_font,
3332 .con_font_copy = fbcon_copy_font,
3333 .con_set_palette = fbcon_set_palette,
3334 .con_scrolldelta = fbcon_scrolldelta,
3335 .con_set_origin = fbcon_set_origin,
3336 .con_invert_region = fbcon_invert_region,
3337 .con_screen_pos = fbcon_screen_pos,
3338 .con_getxy = fbcon_getxy,
3339 .con_resize = fbcon_resize,
3340 };
3341
3342 static struct notifier_block fbcon_event_notifier = {
3343 .notifier_call = fbcon_event_notify,
3344 };
3345
3346 static ssize_t store_rotate(struct device *device,
3347 struct device_attribute *attr, const char *buf,
3348 size_t count)
3349 {
3350 struct fb_info *info;
3351 int rotate, idx;
3352 char **last = NULL;
3353
3354 if (fbcon_has_exited)
3355 return count;
3356
3357 acquire_console_sem();
3358 idx = con2fb_map[fg_console];
3359
3360 if (idx == -1 || registered_fb[idx] == NULL)
3361 goto err;
3362
3363 info = registered_fb[idx];
3364 rotate = simple_strtoul(buf, last, 0);
3365 fbcon_rotate(info, rotate);
3366 err:
3367 release_console_sem();
3368 return count;
3369 }
3370
3371 static ssize_t store_rotate_all(struct device *device,
3372 struct device_attribute *attr,const char *buf,
3373 size_t count)
3374 {
3375 struct fb_info *info;
3376 int rotate, idx;
3377 char **last = NULL;
3378
3379 if (fbcon_has_exited)
3380 return count;
3381
3382 acquire_console_sem();
3383 idx = con2fb_map[fg_console];
3384
3385 if (idx == -1 || registered_fb[idx] == NULL)
3386 goto err;
3387
3388 info = registered_fb[idx];
3389 rotate = simple_strtoul(buf, last, 0);
3390 fbcon_rotate_all(info, rotate);
3391 err:
3392 release_console_sem();
3393 return count;
3394 }
3395
3396 static ssize_t show_rotate(struct device *device,
3397 struct device_attribute *attr,char *buf)
3398 {
3399 struct fb_info *info;
3400 int rotate = 0, idx;
3401
3402 if (fbcon_has_exited)
3403 return 0;
3404
3405 acquire_console_sem();
3406 idx = con2fb_map[fg_console];
3407
3408 if (idx == -1 || registered_fb[idx] == NULL)
3409 goto err;
3410
3411 info = registered_fb[idx];
3412 rotate = fbcon_get_rotate(info);
3413 err:
3414 release_console_sem();
3415 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3416 }
3417
3418 static ssize_t show_cursor_blink(struct device *device,
3419 struct device_attribute *attr, char *buf)
3420 {
3421 struct fb_info *info;
3422 struct fbcon_ops *ops;
3423 int idx, blink = -1;
3424
3425 if (fbcon_has_exited)
3426 return 0;
3427
3428 acquire_console_sem();
3429 idx = con2fb_map[fg_console];
3430
3431 if (idx == -1 || registered_fb[idx] == NULL)
3432 goto err;
3433
3434 info = registered_fb[idx];
3435 ops = info->fbcon_par;
3436
3437 if (!ops)
3438 goto err;
3439
3440 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3441 err:
3442 release_console_sem();
3443 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3444 }
3445
3446 static ssize_t store_cursor_blink(struct device *device,
3447 struct device_attribute *attr,
3448 const char *buf, size_t count)
3449 {
3450 struct fb_info *info;
3451 int blink, idx;
3452 char **last = NULL;
3453
3454 if (fbcon_has_exited)
3455 return count;
3456
3457 acquire_console_sem();
3458 idx = con2fb_map[fg_console];
3459
3460 if (idx == -1 || registered_fb[idx] == NULL)
3461 goto err;
3462
3463 info = registered_fb[idx];
3464
3465 if (!info->fbcon_par)
3466 goto err;
3467
3468 blink = simple_strtoul(buf, last, 0);
3469
3470 if (blink) {
3471 fbcon_cursor_noblink = 0;
3472 fbcon_add_cursor_timer(info);
3473 } else {
3474 fbcon_cursor_noblink = 1;
3475 fbcon_del_cursor_timer(info);
3476 }
3477
3478 err:
3479 release_console_sem();
3480 return count;
3481 }
3482
3483 static struct device_attribute device_attrs[] = {
3484 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3485 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3486 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3487 store_cursor_blink),
3488 };
3489
3490 static int fbcon_init_device(void)
3491 {
3492 int i, error = 0;
3493
3494 fbcon_has_sysfs = 1;
3495
3496 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3497 error = device_create_file(fbcon_device, &device_attrs[i]);
3498
3499 if (error)
3500 break;
3501 }
3502
3503 if (error) {
3504 while (--i >= 0)
3505 device_remove_file(fbcon_device, &device_attrs[i]);
3506
3507 fbcon_has_sysfs = 0;
3508 }
3509
3510 return 0;
3511 }
3512
3513 static void fbcon_start(void)
3514 {
3515 if (num_registered_fb) {
3516 int i;
3517
3518 acquire_console_sem();
3519
3520 for (i = 0; i < FB_MAX; i++) {
3521 if (registered_fb[i] != NULL) {
3522 info_idx = i;
3523 break;
3524 }
3525 }
3526
3527 release_console_sem();
3528 fbcon_takeover(0);
3529 }
3530 }
3531
3532 static void fbcon_exit(void)
3533 {
3534 struct fb_info *info;
3535 int i, j, mapped;
3536
3537 if (fbcon_has_exited)
3538 return;
3539
3540 #ifdef CONFIG_ATARI
3541 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3542 #endif
3543 #ifdef CONFIG_MAC
3544 if (MACH_IS_MAC && vbl_detected)
3545 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3546 #endif
3547
3548 kfree((void *)softback_buf);
3549 softback_buf = 0UL;
3550
3551 for (i = 0; i < FB_MAX; i++) {
3552 mapped = 0;
3553 info = registered_fb[i];
3554
3555 if (info == NULL)
3556 continue;
3557
3558 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3559 if (con2fb_map[j] == i)
3560 mapped = 1;
3561 }
3562
3563 if (mapped) {
3564 if (info->fbops->fb_release)
3565 info->fbops->fb_release(info, 0);
3566 module_put(info->fbops->owner);
3567
3568 if (info->fbcon_par) {
3569 struct fbcon_ops *ops = info->fbcon_par;
3570
3571 fbcon_del_cursor_timer(info);
3572 kfree(ops->cursor_src);
3573 kfree(info->fbcon_par);
3574 info->fbcon_par = NULL;
3575 }
3576
3577 if (info->queue.func == fb_flashcursor)
3578 info->queue.func = NULL;
3579 }
3580 }
3581
3582 fbcon_has_exited = 1;
3583 }
3584
3585 static int __init fb_console_init(void)
3586 {
3587 int i;
3588
3589 acquire_console_sem();
3590 fb_register_client(&fbcon_event_notifier);
3591 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3592
3593 if (IS_ERR(fbcon_device)) {
3594 printk(KERN_WARNING "Unable to create device "
3595 "for fbcon; errno = %ld\n",
3596 PTR_ERR(fbcon_device));
3597 fbcon_device = NULL;
3598 } else
3599 fbcon_init_device();
3600
3601 for (i = 0; i < MAX_NR_CONSOLES; i++)
3602 con2fb_map[i] = -1;
3603
3604 release_console_sem();
3605 fbcon_start();
3606 return 0;
3607 }
3608
3609 module_init(fb_console_init);
3610
3611 #ifdef MODULE
3612
3613 static void __exit fbcon_deinit_device(void)
3614 {
3615 int i;
3616
3617 if (fbcon_has_sysfs) {
3618 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3619 device_remove_file(fbcon_device, &device_attrs[i]);
3620
3621 fbcon_has_sysfs = 0;
3622 }
3623 }
3624
3625 static void __exit fb_console_exit(void)
3626 {
3627 acquire_console_sem();
3628 fb_unregister_client(&fbcon_event_notifier);
3629 fbcon_deinit_device();
3630 device_destroy(fb_class, MKDEV(0, 0));
3631 fbcon_exit();
3632 release_console_sem();
3633 unregister_con_driver(&fb_con);
3634 }
3635
3636 module_exit(fb_console_exit);
3637
3638 #endif
3639
3640 MODULE_LICENSE("GPL");
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