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kmemtrace: SLOB hooks.
[linux-2.6/kmemtrace.git] / drivers / video / console / fbcon.c
blob97aff8db10bf1e53435ef2a3441b83ab9f5ed774
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.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2279 fb_set_var(info, &var);
2280 ops->var = info->var;
2281
2282 if (old_info != NULL && (old_info != info ||
2283 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2284 if (info->fbops->fb_set_par)
2285 info->fbops->fb_set_par(info);
2286
2287 if (old_info != info)
2288 fbcon_del_cursor_timer(old_info);
2289 }
2290
2291 if (fbcon_is_inactive(vc, info) ||
2292 ops->blank_state != FB_BLANK_UNBLANK)
2293 fbcon_del_cursor_timer(info);
2294 else
2295 fbcon_add_cursor_timer(info);
2296
2297 set_blitting_type(vc, info);
2298 ops->cursor_reset = 1;
2299
2300 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2301 ops->rotate = FB_ROTATE_UR;
2302 set_blitting_type(vc, info);
2303 }
2304
2305 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2306 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2307
2308 if (p->userfont)
2309 charcnt = FNTCHARCNT(vc->vc_font.data);
2310
2311 if (charcnt > 256)
2312 vc->vc_complement_mask <<= 1;
2313
2314 updatescrollmode(p, info, vc);
2315
2316 switch (p->scrollmode) {
2317 case SCROLL_WRAP_MOVE:
2318 scrollback_phys_max = p->vrows - vc->vc_rows;
2319 break;
2320 case SCROLL_PAN_MOVE:
2321 case SCROLL_PAN_REDRAW:
2322 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2323 if (scrollback_phys_max < 0)
2324 scrollback_phys_max = 0;
2325 break;
2326 default:
2327 scrollback_phys_max = 0;
2328 break;
2329 }
2330
2331 scrollback_max = 0;
2332 scrollback_current = 0;
2333
2334 if (!fbcon_is_inactive(vc, info)) {
2335 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2336 ops->update_start(info);
2337 }
2338
2339 fbcon_set_palette(vc, color_table);
2340 fbcon_clear_margins(vc, 0);
2341
2342 if (logo_shown == FBCON_LOGO_DRAW) {
2343
2344 logo_shown = fg_console;
2345 /* This is protected above by initmem_freed */
2346 fb_show_logo(info, ops->rotate);
2347 update_region(vc,
2348 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2349 vc->vc_size_row * (vc->vc_bottom -
2350 vc->vc_top) / 2);
2351 return 0;
2352 }
2353 return 1;
2354 }
2355
2356 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2357 int blank)
2358 {
2359 struct fb_event event;
2360
2361 if (blank) {
2362 unsigned short charmask = vc->vc_hi_font_mask ?
2363 0x1ff : 0xff;
2364 unsigned short oldc;
2365
2366 oldc = vc->vc_video_erase_char;
2367 vc->vc_video_erase_char &= charmask;
2368 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2369 vc->vc_video_erase_char = oldc;
2370 }
2371
2372
2373 event.info = info;
2374 event.data = &blank;
2375 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2376 }
2377
2378 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2379 {
2380 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2381 struct fbcon_ops *ops = info->fbcon_par;
2382
2383 if (mode_switch) {
2384 struct fb_var_screeninfo var = info->var;
2385
2386 ops->graphics = 1;
2387
2388 if (!blank) {
2389 if (info->fbops->fb_save_state)
2390 info->fbops->fb_save_state(info);
2391 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2392 fb_set_var(info, &var);
2393 ops->graphics = 0;
2394 ops->var = info->var;
2395 } else if (info->fbops->fb_restore_state)
2396 info->fbops->fb_restore_state(info);
2397 }
2398
2399 if (!fbcon_is_inactive(vc, info)) {
2400 if (ops->blank_state != blank) {
2401 ops->blank_state = blank;
2402 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2403 ops->cursor_flash = (!blank);
2404
2405 if (fb_blank(info, blank))
2406 fbcon_generic_blank(vc, info, blank);
2407 }
2408
2409 if (!blank)
2410 update_screen(vc);
2411 }
2412
2413 if (mode_switch || fbcon_is_inactive(vc, info) ||
2414 ops->blank_state != FB_BLANK_UNBLANK)
2415 fbcon_del_cursor_timer(info);
2416 else
2417 fbcon_add_cursor_timer(info);
2418
2419 return 0;
2420 }
2421
2422 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2423 {
2424 u8 *fontdata = vc->vc_font.data;
2425 u8 *data = font->data;
2426 int i, j;
2427
2428 font->width = vc->vc_font.width;
2429 font->height = vc->vc_font.height;
2430 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2431 if (!font->data)
2432 return 0;
2433
2434 if (font->width <= 8) {
2435 j = vc->vc_font.height;
2436 for (i = 0; i < font->charcount; i++) {
2437 memcpy(data, fontdata, j);
2438 memset(data + j, 0, 32 - j);
2439 data += 32;
2440 fontdata += j;
2441 }
2442 } else if (font->width <= 16) {
2443 j = vc->vc_font.height * 2;
2444 for (i = 0; i < font->charcount; i++) {
2445 memcpy(data, fontdata, j);
2446 memset(data + j, 0, 64 - j);
2447 data += 64;
2448 fontdata += j;
2449 }
2450 } else if (font->width <= 24) {
2451 for (i = 0; i < font->charcount; i++) {
2452 for (j = 0; j < vc->vc_font.height; j++) {
2453 *data++ = fontdata[0];
2454 *data++ = fontdata[1];
2455 *data++ = fontdata[2];
2456 fontdata += sizeof(u32);
2457 }
2458 memset(data, 0, 3 * (32 - j));
2459 data += 3 * (32 - j);
2460 }
2461 } else {
2462 j = vc->vc_font.height * 4;
2463 for (i = 0; i < font->charcount; i++) {
2464 memcpy(data, fontdata, j);
2465 memset(data + j, 0, 128 - j);
2466 data += 128;
2467 fontdata += j;
2468 }
2469 }
2470 return 0;
2471 }
2472
2473 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2474 const u8 * data, int userfont)
2475 {
2476 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2477 struct fbcon_ops *ops = info->fbcon_par;
2478 struct display *p = &fb_display[vc->vc_num];
2479 int resize;
2480 int cnt;
2481 char *old_data = NULL;
2482
2483 if (CON_IS_VISIBLE(vc) && softback_lines)
2484 fbcon_set_origin(vc);
2485
2486 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2487 if (p->userfont)
2488 old_data = vc->vc_font.data;
2489 if (userfont)
2490 cnt = FNTCHARCNT(data);
2491 else
2492 cnt = 256;
2493 vc->vc_font.data = (void *)(p->fontdata = data);
2494 if ((p->userfont = userfont))
2495 REFCOUNT(data)++;
2496 vc->vc_font.width = w;
2497 vc->vc_font.height = h;
2498 if (vc->vc_hi_font_mask && cnt == 256) {
2499 vc->vc_hi_font_mask = 0;
2500 if (vc->vc_can_do_color) {
2501 vc->vc_complement_mask >>= 1;
2502 vc->vc_s_complement_mask >>= 1;
2503 }
2504
2505 /* ++Edmund: reorder the attribute bits */
2506 if (vc->vc_can_do_color) {
2507 unsigned short *cp =
2508 (unsigned short *) vc->vc_origin;
2509 int count = vc->vc_screenbuf_size / 2;
2510 unsigned short c;
2511 for (; count > 0; count--, cp++) {
2512 c = scr_readw(cp);
2513 scr_writew(((c & 0xfe00) >> 1) |
2514 (c & 0xff), cp);
2515 }
2516 c = vc->vc_video_erase_char;
2517 vc->vc_video_erase_char =
2518 ((c & 0xfe00) >> 1) | (c & 0xff);
2519 c = vc->vc_def_color;
2520 vc->vc_scrl_erase_char =
2521 ((c & 0xFE00) >> 1) | (c & 0xFF);
2522 vc->vc_attr >>= 1;
2523 }
2524 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2525 vc->vc_hi_font_mask = 0x100;
2526 if (vc->vc_can_do_color) {
2527 vc->vc_complement_mask <<= 1;
2528 vc->vc_s_complement_mask <<= 1;
2529 }
2530
2531 /* ++Edmund: reorder the attribute bits */
2532 {
2533 unsigned short *cp =
2534 (unsigned short *) vc->vc_origin;
2535 int count = vc->vc_screenbuf_size / 2;
2536 unsigned short c;
2537 for (; count > 0; count--, cp++) {
2538 unsigned short newc;
2539 c = scr_readw(cp);
2540 if (vc->vc_can_do_color)
2541 newc =
2542 ((c & 0xff00) << 1) | (c &
2543 0xff);
2544 else
2545 newc = c & ~0x100;
2546 scr_writew(newc, cp);
2547 }
2548 c = vc->vc_video_erase_char;
2549 if (vc->vc_can_do_color) {
2550 vc->vc_video_erase_char =
2551 ((c & 0xff00) << 1) | (c & 0xff);
2552 c = vc->vc_def_color;
2553 vc->vc_scrl_erase_char =
2554 ((c & 0xFF00) << 1) | (c & 0xFF);
2555 vc->vc_attr <<= 1;
2556 } else {
2557 vc->vc_video_erase_char = c & ~0x100;
2558 vc->vc_scrl_erase_char = c & ~0x100;
2559 }
2560 }
2561
2562 }
2563
2564 if (resize) {
2565 int cols, rows;
2566
2567 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2568 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2569 cols /= w;
2570 rows /= h;
2571 vc_resize(vc, cols, rows);
2572 if (CON_IS_VISIBLE(vc) && softback_buf)
2573 fbcon_update_softback(vc);
2574 } else if (CON_IS_VISIBLE(vc)
2575 && vc->vc_mode == KD_TEXT) {
2576 fbcon_clear_margins(vc, 0);
2577 update_screen(vc);
2578 }
2579
2580 if (old_data && (--REFCOUNT(old_data) == 0))
2581 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2582 return 0;
2583 }
2584
2585 static int fbcon_copy_font(struct vc_data *vc, int con)
2586 {
2587 struct display *od = &fb_display[con];
2588 struct console_font *f = &vc->vc_font;
2589
2590 if (od->fontdata == f->data)
2591 return 0; /* already the same font... */
2592 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2593 }
2594
2595 /*
2596 * User asked to set font; we are guaranteed that
2597 * a) width and height are in range 1..32
2598 * b) charcount does not exceed 512
2599 * but lets not assume that, since someone might someday want to use larger
2600 * fonts. And charcount of 512 is small for unicode support.
2601 *
2602 * However, user space gives the font in 32 rows , regardless of
2603 * actual font height. So a new API is needed if support for larger fonts
2604 * is ever implemented.
2605 */
2606
2607 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2608 {
2609 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2610 unsigned charcount = font->charcount;
2611 int w = font->width;
2612 int h = font->height;
2613 int size;
2614 int i, csum;
2615 u8 *new_data, *data = font->data;
2616 int pitch = (font->width+7) >> 3;
2617
2618 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2619 * If not this check should be changed to charcount < 256 */
2620 if (charcount != 256 && charcount != 512)
2621 return -EINVAL;
2622
2623 /* Make sure drawing engine can handle the font */
2624 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2625 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2626 return -EINVAL;
2627
2628 /* Make sure driver can handle the font length */
2629 if (fbcon_invalid_charcount(info, charcount))
2630 return -EINVAL;
2631
2632 size = h * pitch * charcount;
2633
2634 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2635
2636 if (!new_data)
2637 return -ENOMEM;
2638
2639 new_data += FONT_EXTRA_WORDS * sizeof(int);
2640 FNTSIZE(new_data) = size;
2641 FNTCHARCNT(new_data) = charcount;
2642 REFCOUNT(new_data) = 0; /* usage counter */
2643 for (i=0; i< charcount; i++) {
2644 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2645 }
2646
2647 /* Since linux has a nice crc32 function use it for counting font
2648 * checksums. */
2649 csum = crc32(0, new_data, size);
2650
2651 FNTSUM(new_data) = csum;
2652 /* Check if the same font is on some other console already */
2653 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2654 struct vc_data *tmp = vc_cons[i].d;
2655
2656 if (fb_display[i].userfont &&
2657 fb_display[i].fontdata &&
2658 FNTSUM(fb_display[i].fontdata) == csum &&
2659 FNTSIZE(fb_display[i].fontdata) == size &&
2660 tmp->vc_font.width == w &&
2661 !memcmp(fb_display[i].fontdata, new_data, size)) {
2662 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2663 new_data = (u8 *)fb_display[i].fontdata;
2664 break;
2665 }
2666 }
2667 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2668 }
2669
2670 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2671 {
2672 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2673 const struct font_desc *f;
2674
2675 if (!name)
2676 f = get_default_font(info->var.xres, info->var.yres,
2677 info->pixmap.blit_x, info->pixmap.blit_y);
2678 else if (!(f = find_font(name)))
2679 return -ENOENT;
2680
2681 font->width = f->width;
2682 font->height = f->height;
2683 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2684 }
2685
2686 static u16 palette_red[16];
2687 static u16 palette_green[16];
2688 static u16 palette_blue[16];
2689
2690 static struct fb_cmap palette_cmap = {
2691 0, 16, palette_red, palette_green, palette_blue, NULL
2692 };
2693
2694 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2695 {
2696 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2697 int i, j, k, depth;
2698 u8 val;
2699
2700 if (fbcon_is_inactive(vc, info))
2701 return -EINVAL;
2702
2703 if (!CON_IS_VISIBLE(vc))
2704 return 0;
2705
2706 depth = fb_get_color_depth(&info->var, &info->fix);
2707 if (depth > 3) {
2708 for (i = j = 0; i < 16; i++) {
2709 k = table[i];
2710 val = vc->vc_palette[j++];
2711 palette_red[k] = (val << 8) | val;
2712 val = vc->vc_palette[j++];
2713 palette_green[k] = (val << 8) | val;
2714 val = vc->vc_palette[j++];
2715 palette_blue[k] = (val << 8) | val;
2716 }
2717 palette_cmap.len = 16;
2718 palette_cmap.start = 0;
2719 /*
2720 * If framebuffer is capable of less than 16 colors,
2721 * use default palette of fbcon.
2722 */
2723 } else
2724 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2725
2726 return fb_set_cmap(&palette_cmap, info);
2727 }
2728
2729 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2730 {
2731 unsigned long p;
2732 int line;
2733
2734 if (vc->vc_num != fg_console || !softback_lines)
2735 return (u16 *) (vc->vc_origin + offset);
2736 line = offset / vc->vc_size_row;
2737 if (line >= softback_lines)
2738 return (u16 *) (vc->vc_origin + offset -
2739 softback_lines * vc->vc_size_row);
2740 p = softback_curr + offset;
2741 if (p >= softback_end)
2742 p += softback_buf - softback_end;
2743 return (u16 *) p;
2744 }
2745
2746 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2747 int *px, int *py)
2748 {
2749 unsigned long ret;
2750 int x, y;
2751
2752 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2753 unsigned long offset = (pos - vc->vc_origin) / 2;
2754
2755 x = offset % vc->vc_cols;
2756 y = offset / vc->vc_cols;
2757 if (vc->vc_num == fg_console)
2758 y += softback_lines;
2759 ret = pos + (vc->vc_cols - x) * 2;
2760 } else if (vc->vc_num == fg_console && softback_lines) {
2761 unsigned long offset = pos - softback_curr;
2762
2763 if (pos < softback_curr)
2764 offset += softback_end - softback_buf;
2765 offset /= 2;
2766 x = offset % vc->vc_cols;
2767 y = offset / vc->vc_cols;
2768 ret = pos + (vc->vc_cols - x) * 2;
2769 if (ret == softback_end)
2770 ret = softback_buf;
2771 if (ret == softback_in)
2772 ret = vc->vc_origin;
2773 } else {
2774 /* Should not happen */
2775 x = y = 0;
2776 ret = vc->vc_origin;
2777 }
2778 if (px)
2779 *px = x;
2780 if (py)
2781 *py = y;
2782 return ret;
2783 }
2784
2785 /* As we might be inside of softback, we may work with non-contiguous buffer,
2786 that's why we have to use a separate routine. */
2787 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2788 {
2789 while (cnt--) {
2790 u16 a = scr_readw(p);
2791 if (!vc->vc_can_do_color)
2792 a ^= 0x0800;
2793 else if (vc->vc_hi_font_mask == 0x100)
2794 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2795 (((a) & 0x0e00) << 4);
2796 else
2797 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2798 (((a) & 0x0700) << 4);
2799 scr_writew(a, p++);
2800 if (p == (u16 *) softback_end)
2801 p = (u16 *) softback_buf;
2802 if (p == (u16 *) softback_in)
2803 p = (u16 *) vc->vc_origin;
2804 }
2805 }
2806
2807 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2808 {
2809 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2810 struct fbcon_ops *ops = info->fbcon_par;
2811 struct display *disp = &fb_display[fg_console];
2812 int offset, limit, scrollback_old;
2813
2814 if (softback_top) {
2815 if (vc->vc_num != fg_console)
2816 return 0;
2817 if (vc->vc_mode != KD_TEXT || !lines)
2818 return 0;
2819 if (logo_shown >= 0) {
2820 struct vc_data *conp2 = vc_cons[logo_shown].d;
2821
2822 if (conp2->vc_top == logo_lines
2823 && conp2->vc_bottom == conp2->vc_rows)
2824 conp2->vc_top = 0;
2825 if (logo_shown == vc->vc_num) {
2826 unsigned long p, q;
2827 int i;
2828
2829 p = softback_in;
2830 q = vc->vc_origin +
2831 logo_lines * vc->vc_size_row;
2832 for (i = 0; i < logo_lines; i++) {
2833 if (p == softback_top)
2834 break;
2835 if (p == softback_buf)
2836 p = softback_end;
2837 p -= vc->vc_size_row;
2838 q -= vc->vc_size_row;
2839 scr_memcpyw((u16 *) q, (u16 *) p,
2840 vc->vc_size_row);
2841 }
2842 softback_in = softback_curr = p;
2843 update_region(vc, vc->vc_origin,
2844 logo_lines * vc->vc_cols);
2845 }
2846 logo_shown = FBCON_LOGO_CANSHOW;
2847 }
2848 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2849 fbcon_redraw_softback(vc, disp, lines);
2850 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2851 return 0;
2852 }
2853
2854 if (!scrollback_phys_max)
2855 return -ENOSYS;
2856
2857 scrollback_old = scrollback_current;
2858 scrollback_current -= lines;
2859 if (scrollback_current < 0)
2860 scrollback_current = 0;
2861 else if (scrollback_current > scrollback_max)
2862 scrollback_current = scrollback_max;
2863 if (scrollback_current == scrollback_old)
2864 return 0;
2865
2866 if (fbcon_is_inactive(vc, info))
2867 return 0;
2868
2869 fbcon_cursor(vc, CM_ERASE);
2870
2871 offset = disp->yscroll - scrollback_current;
2872 limit = disp->vrows;
2873 switch (disp->scrollmode) {
2874 case SCROLL_WRAP_MOVE:
2875 info->var.vmode |= FB_VMODE_YWRAP;
2876 break;
2877 case SCROLL_PAN_MOVE:
2878 case SCROLL_PAN_REDRAW:
2879 limit -= vc->vc_rows;
2880 info->var.vmode &= ~FB_VMODE_YWRAP;
2881 break;
2882 }
2883 if (offset < 0)
2884 offset += limit;
2885 else if (offset >= limit)
2886 offset -= limit;
2887
2888 ops->var.xoffset = 0;
2889 ops->var.yoffset = offset * vc->vc_font.height;
2890 ops->update_start(info);
2891
2892 if (!scrollback_current)
2893 fbcon_cursor(vc, CM_DRAW);
2894 return 0;
2895 }
2896
2897 static int fbcon_set_origin(struct vc_data *vc)
2898 {
2899 if (softback_lines)
2900 fbcon_scrolldelta(vc, softback_lines);
2901 return 0;
2902 }
2903
2904 static void fbcon_suspended(struct fb_info *info)
2905 {
2906 struct vc_data *vc = NULL;
2907 struct fbcon_ops *ops = info->fbcon_par;
2908
2909 if (!ops || ops->currcon < 0)
2910 return;
2911 vc = vc_cons[ops->currcon].d;
2912
2913 /* Clear cursor, restore saved data */
2914 fbcon_cursor(vc, CM_ERASE);
2915 }
2916
2917 static void fbcon_resumed(struct fb_info *info)
2918 {
2919 struct vc_data *vc;
2920 struct fbcon_ops *ops = info->fbcon_par;
2921
2922 if (!ops || ops->currcon < 0)
2923 return;
2924 vc = vc_cons[ops->currcon].d;
2925
2926 update_screen(vc);
2927 }
2928
2929 static void fbcon_modechanged(struct fb_info *info)
2930 {
2931 struct fbcon_ops *ops = info->fbcon_par;
2932 struct vc_data *vc;
2933 struct display *p;
2934 int rows, cols;
2935
2936 if (!ops || ops->currcon < 0)
2937 return;
2938 vc = vc_cons[ops->currcon].d;
2939 if (vc->vc_mode != KD_TEXT ||
2940 registered_fb[con2fb_map[ops->currcon]] != info)
2941 return;
2942
2943 p = &fb_display[vc->vc_num];
2944 set_blitting_type(vc, info);
2945
2946 if (CON_IS_VISIBLE(vc)) {
2947 var_to_display(p, &info->var, info);
2948 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2949 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2950 cols /= vc->vc_font.width;
2951 rows /= vc->vc_font.height;
2952 vc_resize(vc, cols, rows);
2953 updatescrollmode(p, info, vc);
2954 scrollback_max = 0;
2955 scrollback_current = 0;
2956
2957 if (!fbcon_is_inactive(vc, info)) {
2958 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2959 ops->update_start(info);
2960 }
2961
2962 fbcon_set_palette(vc, color_table);
2963 update_screen(vc);
2964 if (softback_buf)
2965 fbcon_update_softback(vc);
2966 }
2967 }
2968
2969 static void fbcon_set_all_vcs(struct fb_info *info)
2970 {
2971 struct fbcon_ops *ops = info->fbcon_par;
2972 struct vc_data *vc;
2973 struct display *p;
2974 int i, rows, cols, fg = -1;
2975
2976 if (!ops || ops->currcon < 0)
2977 return;
2978
2979 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2980 vc = vc_cons[i].d;
2981 if (!vc || vc->vc_mode != KD_TEXT ||
2982 registered_fb[con2fb_map[i]] != info)
2983 continue;
2984
2985 if (CON_IS_VISIBLE(vc)) {
2986 fg = i;
2987 continue;
2988 }
2989
2990 p = &fb_display[vc->vc_num];
2991 set_blitting_type(vc, info);
2992 var_to_display(p, &info->var, info);
2993 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2994 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2995 cols /= vc->vc_font.width;
2996 rows /= vc->vc_font.height;
2997 vc_resize(vc, cols, rows);
2998 }
2999
3000 if (fg != -1)
3001 fbcon_modechanged(info);
3002 }
3003
3004 static int fbcon_mode_deleted(struct fb_info *info,
3005 struct fb_videomode *mode)
3006 {
3007 struct fb_info *fb_info;
3008 struct display *p;
3009 int i, j, found = 0;
3010
3011 /* before deletion, ensure that mode is not in use */
3012 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3013 j = con2fb_map[i];
3014 if (j == -1)
3015 continue;
3016 fb_info = registered_fb[j];
3017 if (fb_info != info)
3018 continue;
3019 p = &fb_display[i];
3020 if (!p || !p->mode)
3021 continue;
3022 if (fb_mode_is_equal(p->mode, mode)) {
3023 found = 1;
3024 break;
3025 }
3026 }
3027 return found;
3028 }
3029
3030 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3031 static int fbcon_unbind(void)
3032 {
3033 int ret;
3034
3035 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3036 fbcon_is_default);
3037 return ret;
3038 }
3039 #else
3040 static inline int fbcon_unbind(void)
3041 {
3042 return -EINVAL;
3043 }
3044 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3045
3046 static int fbcon_fb_unbind(int idx)
3047 {
3048 int i, new_idx = -1, ret = 0;
3049
3050 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3051 if (con2fb_map[i] != idx &&
3052 con2fb_map[i] != -1) {
3053 new_idx = i;
3054 break;
3055 }
3056 }
3057
3058 if (new_idx != -1) {
3059 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3060 if (con2fb_map[i] == idx)
3061 set_con2fb_map(i, new_idx, 0);
3062 }
3063 } else
3064 ret = fbcon_unbind();
3065
3066 return ret;
3067 }
3068
3069 static int fbcon_fb_unregistered(struct fb_info *info)
3070 {
3071 int i, idx = info->node;
3072
3073 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3074 if (con2fb_map[i] == idx)
3075 con2fb_map[i] = -1;
3076 }
3077
3078 if (idx == info_idx) {
3079 info_idx = -1;
3080
3081 for (i = 0; i < FB_MAX; i++) {
3082 if (registered_fb[i] != NULL) {
3083 info_idx = i;
3084 break;
3085 }
3086 }
3087 }
3088
3089 if (info_idx != -1) {
3090 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3091 if (con2fb_map[i] == -1)
3092 con2fb_map[i] = info_idx;
3093 }
3094 }
3095
3096 if (!num_registered_fb)
3097 unregister_con_driver(&fb_con);
3098
3099
3100 if (primary_device == idx)
3101 primary_device = -1;
3102
3103 return 0;
3104 }
3105
3106 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3107 static void fbcon_select_primary(struct fb_info *info)
3108 {
3109 if (!map_override && primary_device == -1 &&
3110 fb_is_primary_device(info)) {
3111 int i;
3112
3113 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3114 info->fix.id, info->node);
3115 primary_device = info->node;
3116
3117 for (i = first_fb_vc; i <= last_fb_vc; i++)
3118 con2fb_map_boot[i] = primary_device;
3119
3120 if (con_is_bound(&fb_con)) {
3121 printk(KERN_INFO "fbcon: Remapping primary device, "
3122 "fb%i, to tty %i-%i\n", info->node,
3123 first_fb_vc + 1, last_fb_vc + 1);
3124 info_idx = primary_device;
3125 }
3126 }
3127
3128 }
3129 #else
3130 static inline void fbcon_select_primary(struct fb_info *info)
3131 {
3132 return;
3133 }
3134 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3135
3136 static int fbcon_fb_registered(struct fb_info *info)
3137 {
3138 int ret = 0, i, idx = info->node;
3139
3140 fbcon_select_primary(info);
3141
3142 if (info_idx == -1) {
3143 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3144 if (con2fb_map_boot[i] == idx) {
3145 info_idx = idx;
3146 break;
3147 }
3148 }
3149
3150 if (info_idx != -1)
3151 ret = fbcon_takeover(1);
3152 } else {
3153 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3154 if (con2fb_map_boot[i] == idx)
3155 set_con2fb_map(i, idx, 0);
3156 }
3157 }
3158
3159 return ret;
3160 }
3161
3162 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3163 {
3164 struct fbcon_ops *ops = info->fbcon_par;
3165 struct vc_data *vc;
3166
3167 if (!ops || ops->currcon < 0)
3168 return;
3169
3170 vc = vc_cons[ops->currcon].d;
3171 if (vc->vc_mode != KD_TEXT ||
3172 registered_fb[con2fb_map[ops->currcon]] != info)
3173 return;
3174
3175 if (CON_IS_VISIBLE(vc)) {
3176 if (blank)
3177 do_blank_screen(0);
3178 else
3179 do_unblank_screen(0);
3180 }
3181 ops->blank_state = blank;
3182 }
3183
3184 static void fbcon_new_modelist(struct fb_info *info)
3185 {
3186 int i;
3187 struct vc_data *vc;
3188 struct fb_var_screeninfo var;
3189 const struct fb_videomode *mode;
3190
3191 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3192 if (registered_fb[con2fb_map[i]] != info)
3193 continue;
3194 if (!fb_display[i].mode)
3195 continue;
3196 vc = vc_cons[i].d;
3197 display_to_var(&var, &fb_display[i]);
3198 mode = fb_find_nearest_mode(fb_display[i].mode,
3199 &info->modelist);
3200 fb_videomode_to_var(&var, mode);
3201 fbcon_set_disp(info, &var, vc->vc_num);
3202 }
3203 }
3204
3205 static void fbcon_get_requirement(struct fb_info *info,
3206 struct fb_blit_caps *caps)
3207 {
3208 struct vc_data *vc;
3209 struct display *p;
3210
3211 if (caps->flags) {
3212 int i, charcnt;
3213
3214 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3215 vc = vc_cons[i].d;
3216 if (vc && vc->vc_mode == KD_TEXT &&
3217 info->node == con2fb_map[i]) {
3218 p = &fb_display[i];
3219 caps->x |= 1 << (vc->vc_font.width - 1);
3220 caps->y |= 1 << (vc->vc_font.height - 1);
3221 charcnt = (p->userfont) ?
3222 FNTCHARCNT(p->fontdata) : 256;
3223 if (caps->len < charcnt)
3224 caps->len = charcnt;
3225 }
3226 }
3227 } else {
3228 vc = vc_cons[fg_console].d;
3229
3230 if (vc && vc->vc_mode == KD_TEXT &&
3231 info->node == con2fb_map[fg_console]) {
3232 p = &fb_display[fg_console];
3233 caps->x = 1 << (vc->vc_font.width - 1);
3234 caps->y = 1 << (vc->vc_font.height - 1);
3235 caps->len = (p->userfont) ?
3236 FNTCHARCNT(p->fontdata) : 256;
3237 }
3238 }
3239 }
3240
3241 static int fbcon_event_notify(struct notifier_block *self,
3242 unsigned long action, void *data)
3243 {
3244 struct fb_event *event = data;
3245 struct fb_info *info = event->info;
3246 struct fb_videomode *mode;
3247 struct fb_con2fbmap *con2fb;
3248 struct fb_blit_caps *caps;
3249 int ret = 0;
3250
3251 /*
3252 * ignore all events except driver registration and deregistration
3253 * if fbcon is not active
3254 */
3255 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3256 action == FB_EVENT_FB_UNREGISTERED))
3257 goto done;
3258
3259 switch(action) {
3260 case FB_EVENT_SUSPEND:
3261 fbcon_suspended(info);
3262 break;
3263 case FB_EVENT_RESUME:
3264 fbcon_resumed(info);
3265 break;
3266 case FB_EVENT_MODE_CHANGE:
3267 fbcon_modechanged(info);
3268 break;
3269 case FB_EVENT_MODE_CHANGE_ALL:
3270 fbcon_set_all_vcs(info);
3271 break;
3272 case FB_EVENT_MODE_DELETE:
3273 mode = event->data;
3274 ret = fbcon_mode_deleted(info, mode);
3275 break;
3276 case FB_EVENT_FB_UNBIND:
3277 ret = fbcon_fb_unbind(info->node);
3278 break;
3279 case FB_EVENT_FB_REGISTERED:
3280 ret = fbcon_fb_registered(info);
3281 break;
3282 case FB_EVENT_FB_UNREGISTERED:
3283 ret = fbcon_fb_unregistered(info);
3284 break;
3285 case FB_EVENT_SET_CONSOLE_MAP:
3286 con2fb = event->data;
3287 ret = set_con2fb_map(con2fb->console - 1,
3288 con2fb->framebuffer, 1);
3289 break;
3290 case FB_EVENT_GET_CONSOLE_MAP:
3291 con2fb = event->data;
3292 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3293 break;
3294 case FB_EVENT_BLANK:
3295 fbcon_fb_blanked(info, *(int *)event->data);
3296 break;
3297 case FB_EVENT_NEW_MODELIST:
3298 fbcon_new_modelist(info);
3299 break;
3300 case FB_EVENT_GET_REQ:
3301 caps = event->data;
3302 fbcon_get_requirement(info, caps);
3303 break;
3304 }
3305
3306 done:
3307 return ret;
3308 }
3309
3310 /*
3311 * The console `switch' structure for the frame buffer based console
3312 */
3313
3314 static const struct consw fb_con = {
3315 .owner = THIS_MODULE,
3316 .con_startup = fbcon_startup,
3317 .con_init = fbcon_init,
3318 .con_deinit = fbcon_deinit,
3319 .con_clear = fbcon_clear,
3320 .con_putc = fbcon_putc,
3321 .con_putcs = fbcon_putcs,
3322 .con_cursor = fbcon_cursor,
3323 .con_scroll = fbcon_scroll,
3324 .con_bmove = fbcon_bmove,
3325 .con_switch = fbcon_switch,
3326 .con_blank = fbcon_blank,
3327 .con_font_set = fbcon_set_font,
3328 .con_font_get = fbcon_get_font,
3329 .con_font_default = fbcon_set_def_font,
3330 .con_font_copy = fbcon_copy_font,
3331 .con_set_palette = fbcon_set_palette,
3332 .con_scrolldelta = fbcon_scrolldelta,
3333 .con_set_origin = fbcon_set_origin,
3334 .con_invert_region = fbcon_invert_region,
3335 .con_screen_pos = fbcon_screen_pos,
3336 .con_getxy = fbcon_getxy,
3337 .con_resize = fbcon_resize,
3338 };
3339
3340 static struct notifier_block fbcon_event_notifier = {
3341 .notifier_call = fbcon_event_notify,
3342 };
3343
3344 static ssize_t store_rotate(struct device *device,
3345 struct device_attribute *attr, const char *buf,
3346 size_t count)
3347 {
3348 struct fb_info *info;
3349 int rotate, idx;
3350 char **last = NULL;
3351
3352 if (fbcon_has_exited)
3353 return count;
3354
3355 acquire_console_sem();
3356 idx = con2fb_map[fg_console];
3357
3358 if (idx == -1 || registered_fb[idx] == NULL)
3359 goto err;
3360
3361 info = registered_fb[idx];
3362 rotate = simple_strtoul(buf, last, 0);
3363 fbcon_rotate(info, rotate);
3364 err:
3365 release_console_sem();
3366 return count;
3367 }
3368
3369 static ssize_t store_rotate_all(struct device *device,
3370 struct device_attribute *attr,const char *buf,
3371 size_t count)
3372 {
3373 struct fb_info *info;
3374 int rotate, idx;
3375 char **last = NULL;
3376
3377 if (fbcon_has_exited)
3378 return count;
3379
3380 acquire_console_sem();
3381 idx = con2fb_map[fg_console];
3382
3383 if (idx == -1 || registered_fb[idx] == NULL)
3384 goto err;
3385
3386 info = registered_fb[idx];
3387 rotate = simple_strtoul(buf, last, 0);
3388 fbcon_rotate_all(info, rotate);
3389 err:
3390 release_console_sem();
3391 return count;
3392 }
3393
3394 static ssize_t show_rotate(struct device *device,
3395 struct device_attribute *attr,char *buf)
3396 {
3397 struct fb_info *info;
3398 int rotate = 0, idx;
3399
3400 if (fbcon_has_exited)
3401 return 0;
3402
3403 acquire_console_sem();
3404 idx = con2fb_map[fg_console];
3405
3406 if (idx == -1 || registered_fb[idx] == NULL)
3407 goto err;
3408
3409 info = registered_fb[idx];
3410 rotate = fbcon_get_rotate(info);
3411 err:
3412 release_console_sem();
3413 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3414 }
3415
3416 static ssize_t show_cursor_blink(struct device *device,
3417 struct device_attribute *attr, char *buf)
3418 {
3419 struct fb_info *info;
3420 struct fbcon_ops *ops;
3421 int idx, blink = -1;
3422
3423 if (fbcon_has_exited)
3424 return 0;
3425
3426 acquire_console_sem();
3427 idx = con2fb_map[fg_console];
3428
3429 if (idx == -1 || registered_fb[idx] == NULL)
3430 goto err;
3431
3432 info = registered_fb[idx];
3433 ops = info->fbcon_par;
3434
3435 if (!ops)
3436 goto err;
3437
3438 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3439 err:
3440 release_console_sem();
3441 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3442 }
3443
3444 static ssize_t store_cursor_blink(struct device *device,
3445 struct device_attribute *attr,
3446 const char *buf, size_t count)
3447 {
3448 struct fb_info *info;
3449 int blink, idx;
3450 char **last = NULL;
3451
3452 if (fbcon_has_exited)
3453 return count;
3454
3455 acquire_console_sem();
3456 idx = con2fb_map[fg_console];
3457
3458 if (idx == -1 || registered_fb[idx] == NULL)
3459 goto err;
3460
3461 info = registered_fb[idx];
3462
3463 if (!info->fbcon_par)
3464 goto err;
3465
3466 blink = simple_strtoul(buf, last, 0);
3467
3468 if (blink) {
3469 fbcon_cursor_noblink = 0;
3470 fbcon_add_cursor_timer(info);
3471 } else {
3472 fbcon_cursor_noblink = 1;
3473 fbcon_del_cursor_timer(info);
3474 }
3475
3476 err:
3477 release_console_sem();
3478 return count;
3479 }
3480
3481 static struct device_attribute device_attrs[] = {
3482 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3483 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3484 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3485 store_cursor_blink),
3486 };
3487
3488 static int fbcon_init_device(void)
3489 {
3490 int i, error = 0;
3491
3492 fbcon_has_sysfs = 1;
3493
3494 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3495 error = device_create_file(fbcon_device, &device_attrs[i]);
3496
3497 if (error)
3498 break;
3499 }
3500
3501 if (error) {
3502 while (--i >= 0)
3503 device_remove_file(fbcon_device, &device_attrs[i]);
3504
3505 fbcon_has_sysfs = 0;
3506 }
3507
3508 return 0;
3509 }
3510
3511 static void fbcon_start(void)
3512 {
3513 if (num_registered_fb) {
3514 int i;
3515
3516 acquire_console_sem();
3517
3518 for (i = 0; i < FB_MAX; i++) {
3519 if (registered_fb[i] != NULL) {
3520 info_idx = i;
3521 break;
3522 }
3523 }
3524
3525 release_console_sem();
3526 fbcon_takeover(0);
3527 }
3528 }
3529
3530 static void fbcon_exit(void)
3531 {
3532 struct fb_info *info;
3533 int i, j, mapped;
3534
3535 if (fbcon_has_exited)
3536 return;
3537
3538 #ifdef CONFIG_ATARI
3539 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3540 #endif
3541 #ifdef CONFIG_MAC
3542 if (MACH_IS_MAC && vbl_detected)
3543 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3544 #endif
3545
3546 kfree((void *)softback_buf);
3547 softback_buf = 0UL;
3548
3549 for (i = 0; i < FB_MAX; i++) {
3550 mapped = 0;
3551 info = registered_fb[i];
3552
3553 if (info == NULL)
3554 continue;
3555
3556 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3557 if (con2fb_map[j] == i)
3558 mapped = 1;
3559 }
3560
3561 if (mapped) {
3562 if (info->fbops->fb_release)
3563 info->fbops->fb_release(info, 0);
3564 module_put(info->fbops->owner);
3565
3566 if (info->fbcon_par) {
3567 struct fbcon_ops *ops = info->fbcon_par;
3568
3569 fbcon_del_cursor_timer(info);
3570 kfree(ops->cursor_src);
3571 kfree(info->fbcon_par);
3572 info->fbcon_par = NULL;
3573 }
3574
3575 if (info->queue.func == fb_flashcursor)
3576 info->queue.func = NULL;
3577 }
3578 }
3579
3580 fbcon_has_exited = 1;
3581 }
3582
3583 static int __init fb_console_init(void)
3584 {
3585 int i;
3586
3587 acquire_console_sem();
3588 fb_register_client(&fbcon_event_notifier);
3589 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3590
3591 if (IS_ERR(fbcon_device)) {
3592 printk(KERN_WARNING "Unable to create device "
3593 "for fbcon; errno = %ld\n",
3594 PTR_ERR(fbcon_device));
3595 fbcon_device = NULL;
3596 } else
3597 fbcon_init_device();
3598
3599 for (i = 0; i < MAX_NR_CONSOLES; i++)
3600 con2fb_map[i] = -1;
3601
3602 release_console_sem();
3603 fbcon_start();
3604 return 0;
3605 }
3606
3607 module_init(fb_console_init);
3608
3609 #ifdef MODULE
3610
3611 static void __exit fbcon_deinit_device(void)
3612 {
3613 int i;
3614
3615 if (fbcon_has_sysfs) {
3616 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3617 device_remove_file(fbcon_device, &device_attrs[i]);
3618
3619 fbcon_has_sysfs = 0;
3620 }
3621 }
3622
3623 static void __exit fb_console_exit(void)
3624 {
3625 acquire_console_sem();
3626 fb_unregister_client(&fbcon_event_notifier);
3627 fbcon_deinit_device();
3628 device_destroy(fb_class, MKDEV(0, 0));
3629 fbcon_exit();
3630 release_console_sem();
3631 unregister_con_driver(&fb_con);
3632 }
3633
3634 module_exit(fb_console_exit);
3635
3636 #endif
3637
3638 MODULE_LICENSE("GPL");
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