projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'sched/core' into cpus4096
[deliverable/linux.git] / drivers / video / console / fbcon.c
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/fb.h>
79 #include <asm/irq.h>
80 #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
111 static int logo_lines;
112 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
113 enums. */
114 static int logo_shown = FBCON_LOGO_CANSHOW;
115 /* Software scrollback */
116 static int fbcon_softback_size = 32768;
117 static unsigned long softback_buf, softback_curr;
118 static unsigned long softback_in;
119 static unsigned long softback_top, softback_end;
120 static int softback_lines;
121 /* console mappings */
122 static int first_fb_vc;
123 static int last_fb_vc = MAX_NR_CONSOLES - 1;
124 static int fbcon_is_default = 1;
125 static int fbcon_has_exited;
126 static int primary_device = -1;
127
128 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
129 static int map_override;
130
131 static inline void fbcon_map_override(void)
132 {
133 map_override = 1;
134 }
135 #else
136 static inline void fbcon_map_override(void)
137 {
138 }
139 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
140
141 /* font data */
142 static char fontname[40];
143
144 /* current fb_info */
145 static int info_idx = -1;
146
147 /* console rotation */
148 static int initial_rotation;
149 static int fbcon_has_sysfs;
150
151 static const struct consw fb_con;
152
153 #define CM_SOFTBACK (8)
154
155 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
156
157 static int fbcon_set_origin(struct vc_data *);
158
159 #define CURSOR_DRAW_DELAY (1)
160
161 /* # VBL ints between cursor state changes */
162 #define ATARI_CURSOR_BLINK_RATE (42)
163 #define MAC_CURSOR_BLINK_RATE (32)
164 #define DEFAULT_CURSOR_BLINK_RATE (20)
165
166 static int vbl_cursor_cnt;
167 static int fbcon_cursor_noblink;
168
169 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
170
171 /*
172 * Interface used by the world
173 */
174
175 static const char *fbcon_startup(void);
176 static void fbcon_init(struct vc_data *vc, int init);
177 static void fbcon_deinit(struct vc_data *vc);
178 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
179 int width);
180 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
181 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
182 int count, int ypos, int xpos);
183 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
184 static void fbcon_cursor(struct vc_data *vc, int mode);
185 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
186 int count);
187 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
188 int height, int width);
189 static int fbcon_switch(struct vc_data *vc);
190 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
191 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
192 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
193
194 /*
195 * Internal routines
196 */
197 static __inline__ void ywrap_up(struct vc_data *vc, int count);
198 static __inline__ void ywrap_down(struct vc_data *vc, int count);
199 static __inline__ void ypan_up(struct vc_data *vc, int count);
200 static __inline__ void ypan_down(struct vc_data *vc, int count);
201 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
202 int dy, int dx, int height, int width, u_int y_break);
203 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
204 int unit);
205 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
206 int line, int count, int dy);
207 static void fbcon_modechanged(struct fb_info *info);
208 static void fbcon_set_all_vcs(struct fb_info *info);
209 static void fbcon_start(void);
210 static void fbcon_exit(void);
211 static struct device *fbcon_device;
212
213 #ifdef CONFIG_MAC
214 /*
215 * On the Macintoy, there may or may not be a working VBL int. We need to probe
216 */
217 static int vbl_detected;
218
219 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
220 {
221 vbl_detected++;
222 return IRQ_HANDLED;
223 }
224 #endif
225
226 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
227 static inline void fbcon_set_rotation(struct fb_info *info)
228 {
229 struct fbcon_ops *ops = info->fbcon_par;
230
231 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
232 ops->p->con_rotate < 4)
233 ops->rotate = ops->p->con_rotate;
234 else
235 ops->rotate = 0;
236 }
237
238 static void fbcon_rotate(struct fb_info *info, u32 rotate)
239 {
240 struct fbcon_ops *ops= info->fbcon_par;
241 struct fb_info *fb_info;
242
243 if (!ops || ops->currcon == -1)
244 return;
245
246 fb_info = registered_fb[con2fb_map[ops->currcon]];
247
248 if (info == fb_info) {
249 struct display *p = &fb_display[ops->currcon];
250
251 if (rotate < 4)
252 p->con_rotate = rotate;
253 else
254 p->con_rotate = 0;
255
256 fbcon_modechanged(info);
257 }
258 }
259
260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
261 {
262 struct fbcon_ops *ops = info->fbcon_par;
263 struct vc_data *vc;
264 struct display *p;
265 int i;
266
267 if (!ops || ops->currcon < 0 || rotate > 3)
268 return;
269
270 for (i = first_fb_vc; i <= last_fb_vc; i++) {
271 vc = vc_cons[i].d;
272 if (!vc || vc->vc_mode != KD_TEXT ||
273 registered_fb[con2fb_map[i]] != info)
274 continue;
275
276 p = &fb_display[vc->vc_num];
277 p->con_rotate = rotate;
278 }
279
280 fbcon_set_all_vcs(info);
281 }
282 #else
283 static inline void fbcon_set_rotation(struct fb_info *info)
284 {
285 struct fbcon_ops *ops = info->fbcon_par;
286
287 ops->rotate = FB_ROTATE_UR;
288 }
289
290 static void fbcon_rotate(struct fb_info *info, u32 rotate)
291 {
292 return;
293 }
294
295 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
296 {
297 return;
298 }
299 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
300
301 static int fbcon_get_rotate(struct fb_info *info)
302 {
303 struct fbcon_ops *ops = info->fbcon_par;
304
305 return (ops) ? ops->rotate : 0;
306 }
307
308 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
309 {
310 struct fbcon_ops *ops = info->fbcon_par;
311
312 return (info->state != FBINFO_STATE_RUNNING ||
313 vc->vc_mode != KD_TEXT || ops->graphics);
314 }
315
316 static inline int get_color(struct vc_data *vc, struct fb_info *info,
317 u16 c, int is_fg)
318 {
319 int depth = fb_get_color_depth(&info->var, &info->fix);
320 int color = 0;
321
322 if (console_blanked) {
323 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
324
325 c = vc->vc_video_erase_char & charmask;
326 }
327
328 if (depth != 1)
329 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
330 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
331
332 switch (depth) {
333 case 1:
334 {
335 int col = mono_col(info);
336 /* 0 or 1 */
337 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
338 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
339
340 if (console_blanked)
341 fg = bg;
342
343 color = (is_fg) ? fg : bg;
344 break;
345 }
346 case 2:
347 /*
348 * Scale down 16-colors to 4 colors. Default 4-color palette
349 * is grayscale. However, simply dividing the values by 4
350 * will not work, as colors 1, 2 and 3 will be scaled-down
351 * to zero rendering them invisible. So empirically convert
352 * colors to a sane 4-level grayscale.
353 */
354 switch (color) {
355 case 0:
356 color = 0; /* black */
357 break;
358 case 1 ... 6:
359 color = 2; /* white */
360 break;
361 case 7 ... 8:
362 color = 1; /* gray */
363 break;
364 default:
365 color = 3; /* intense white */
366 break;
367 }
368 break;
369 case 3:
370 /*
371 * Last 8 entries of default 16-color palette is a more intense
372 * version of the first 8 (i.e., same chrominance, different
373 * luminance).
374 */
375 color &= 7;
376 break;
377 }
378
379
380 return color;
381 }
382
383 static void fbcon_update_softback(struct vc_data *vc)
384 {
385 int l = fbcon_softback_size / vc->vc_size_row;
386
387 if (l > 5)
388 softback_end = softback_buf + l * vc->vc_size_row;
389 else
390 /* Smaller scrollback makes no sense, and 0 would screw
391 the operation totally */
392 softback_top = 0;
393 }
394
395 static void fb_flashcursor(struct work_struct *work)
396 {
397 struct fb_info *info = container_of(work, struct fb_info, queue);
398 struct fbcon_ops *ops = info->fbcon_par;
399 struct display *p;
400 struct vc_data *vc = NULL;
401 int c;
402 int mode;
403
404 acquire_console_sem();
405 if (ops && ops->currcon != -1)
406 vc = vc_cons[ops->currcon].d;
407
408 if (!vc || !CON_IS_VISIBLE(vc) ||
409 registered_fb[con2fb_map[vc->vc_num]] != info ||
410 vc->vc_deccm != 1) {
411 release_console_sem();
412 return;
413 }
414
415 p = &fb_display[vc->vc_num];
416 c = scr_readw((u16 *) vc->vc_pos);
417 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
418 CM_ERASE : CM_DRAW;
419 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
420 get_color(vc, info, c, 0));
421 release_console_sem();
422 }
423
424 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
425 static int cursor_blink_rate;
426 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
427 {
428 struct fb_info *info = dev_id;
429
430 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
431 schedule_work(&info->queue);
432 vbl_cursor_cnt = cursor_blink_rate;
433 }
434 return IRQ_HANDLED;
435 }
436 #endif
437
438 static void cursor_timer_handler(unsigned long dev_addr)
439 {
440 struct fb_info *info = (struct fb_info *) dev_addr;
441 struct fbcon_ops *ops = info->fbcon_par;
442
443 schedule_work(&info->queue);
444 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
445 }
446
447 static void fbcon_add_cursor_timer(struct fb_info *info)
448 {
449 struct fbcon_ops *ops = info->fbcon_par;
450
451 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
452 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
453 !fbcon_cursor_noblink) {
454 if (!info->queue.func)
455 INIT_WORK(&info->queue, fb_flashcursor);
456
457 init_timer(&ops->cursor_timer);
458 ops->cursor_timer.function = cursor_timer_handler;
459 ops->cursor_timer.expires = jiffies + HZ / 5;
460 ops->cursor_timer.data = (unsigned long ) info;
461 add_timer(&ops->cursor_timer);
462 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
463 }
464 }
465
466 static void fbcon_del_cursor_timer(struct fb_info *info)
467 {
468 struct fbcon_ops *ops = info->fbcon_par;
469
470 if (info->queue.func == fb_flashcursor &&
471 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
472 del_timer_sync(&ops->cursor_timer);
473 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
474 }
475 }
476
477 #ifndef MODULE
478 static int __init fb_console_setup(char *this_opt)
479 {
480 char *options;
481 int i, j;
482
483 if (!this_opt || !*this_opt)
484 return 1;
485
486 while ((options = strsep(&this_opt, ",")) != NULL) {
487 if (!strncmp(options, "font:", 5))
488 strcpy(fontname, options + 5);
489
490 if (!strncmp(options, "scrollback:", 11)) {
491 options += 11;
492 if (*options) {
493 fbcon_softback_size = simple_strtoul(options, &options, 0);
494 if (*options == 'k' || *options == 'K') {
495 fbcon_softback_size *= 1024;
496 options++;
497 }
498 if (*options != ',')
499 return 1;
500 options++;
501 } else
502 return 1;
503 }
504
505 if (!strncmp(options, "map:", 4)) {
506 options += 4;
507 if (*options) {
508 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
509 if (!options[j])
510 j = 0;
511 con2fb_map_boot[i] =
512 (options[j++]-'0') % FB_MAX;
513 }
514
515 fbcon_map_override();
516 }
517
518 return 1;
519 }
520
521 if (!strncmp(options, "vc:", 3)) {
522 options += 3;
523 if (*options)
524 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
525 if (first_fb_vc < 0)
526 first_fb_vc = 0;
527 if (*options++ == '-')
528 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
529 fbcon_is_default = 0;
530 }
531
532 if (!strncmp(options, "rotate:", 7)) {
533 options += 7;
534 if (*options)
535 initial_rotation = simple_strtoul(options, &options, 0);
536 if (initial_rotation > 3)
537 initial_rotation = 0;
538 }
539 }
540 return 1;
541 }
542
543 __setup("fbcon=", fb_console_setup);
544 #endif
545
546 static int search_fb_in_map(int idx)
547 {
548 int i, retval = 0;
549
550 for (i = first_fb_vc; i <= last_fb_vc; i++) {
551 if (con2fb_map[i] == idx)
552 retval = 1;
553 }
554 return retval;
555 }
556
557 static int search_for_mapped_con(void)
558 {
559 int i, retval = 0;
560
561 for (i = first_fb_vc; i <= last_fb_vc; i++) {
562 if (con2fb_map[i] != -1)
563 retval = 1;
564 }
565 return retval;
566 }
567
568 static int fbcon_takeover(int show_logo)
569 {
570 int err, i;
571
572 if (!num_registered_fb)
573 return -ENODEV;
574
575 if (!show_logo)
576 logo_shown = FBCON_LOGO_DONTSHOW;
577
578 for (i = first_fb_vc; i <= last_fb_vc; i++)
579 con2fb_map[i] = info_idx;
580
581 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
582 fbcon_is_default);
583
584 if (err) {
585 for (i = first_fb_vc; i <= last_fb_vc; i++) {
586 con2fb_map[i] = -1;
587 }
588 info_idx = -1;
589 }
590
591 return err;
592 }
593
594 #ifdef MODULE
595 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
596 int cols, int rows, int new_cols, int new_rows)
597 {
598 logo_shown = FBCON_LOGO_DONTSHOW;
599 }
600 #else
601 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
602 int cols, int rows, int new_cols, int new_rows)
603 {
604 /* Need to make room for the logo */
605 struct fbcon_ops *ops = info->fbcon_par;
606 int cnt, erase = vc->vc_video_erase_char, step;
607 unsigned short *save = NULL, *r, *q;
608 int logo_height;
609
610 if (info->flags & FBINFO_MODULE) {
611 logo_shown = FBCON_LOGO_DONTSHOW;
612 return;
613 }
614
615 /*
616 * remove underline attribute from erase character
617 * if black and white framebuffer.
618 */
619 if (fb_get_color_depth(&info->var, &info->fix) == 1)
620 erase &= ~0x400;
621 logo_height = fb_prepare_logo(info, ops->rotate);
622 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
623 q = (unsigned short *) (vc->vc_origin +
624 vc->vc_size_row * rows);
625 step = logo_lines * cols;
626 for (r = q - logo_lines * cols; r < q; r++)
627 if (scr_readw(r) != vc->vc_video_erase_char)
628 break;
629 if (r != q && new_rows >= rows + logo_lines) {
630 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
631 if (save) {
632 int i = cols < new_cols ? cols : new_cols;
633 scr_memsetw(save, erase, logo_lines * new_cols * 2);
634 r = q - step;
635 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
636 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
637 r = q;
638 }
639 }
640 if (r == q) {
641 /* We can scroll screen down */
642 r = q - step - cols;
643 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
644 scr_memcpyw(r + step, r, vc->vc_size_row);
645 r -= cols;
646 }
647 if (!save) {
648 int lines;
649 if (vc->vc_y + logo_lines >= rows)
650 lines = rows - vc->vc_y - 1;
651 else
652 lines = logo_lines;
653 vc->vc_y += lines;
654 vc->vc_pos += lines * vc->vc_size_row;
655 }
656 }
657 scr_memsetw((unsigned short *) vc->vc_origin,
658 erase,
659 vc->vc_size_row * logo_lines);
660
661 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
662 fbcon_clear_margins(vc, 0);
663 update_screen(vc);
664 }
665
666 if (save) {
667 q = (unsigned short *) (vc->vc_origin +
668 vc->vc_size_row *
669 rows);
670 scr_memcpyw(q, save, logo_lines * new_cols * 2);
671 vc->vc_y += logo_lines;
672 vc->vc_pos += logo_lines * vc->vc_size_row;
673 kfree(save);
674 }
675
676 if (logo_lines > vc->vc_bottom) {
677 logo_shown = FBCON_LOGO_CANSHOW;
678 printk(KERN_INFO
679 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
680 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
681 logo_shown = FBCON_LOGO_DRAW;
682 vc->vc_top = logo_lines;
683 }
684 }
685 #endif /* MODULE */
686
687 #ifdef CONFIG_FB_TILEBLITTING
688 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
689 {
690 struct fbcon_ops *ops = info->fbcon_par;
691
692 ops->p = &fb_display[vc->vc_num];
693
694 if ((info->flags & FBINFO_MISC_TILEBLITTING))
695 fbcon_set_tileops(vc, info);
696 else {
697 fbcon_set_rotation(info);
698 fbcon_set_bitops(ops);
699 }
700 }
701
702 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
703 {
704 int err = 0;
705
706 if (info->flags & FBINFO_MISC_TILEBLITTING &&
707 info->tileops->fb_get_tilemax(info) < charcount)
708 err = 1;
709
710 return err;
711 }
712 #else
713 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
714 {
715 struct fbcon_ops *ops = info->fbcon_par;
716
717 info->flags &= ~FBINFO_MISC_TILEBLITTING;
718 ops->p = &fb_display[vc->vc_num];
719 fbcon_set_rotation(info);
720 fbcon_set_bitops(ops);
721 }
722
723 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
724 {
725 return 0;
726 }
727
728 #endif /* CONFIG_MISC_TILEBLITTING */
729
730
731 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
732 int unit, int oldidx)
733 {
734 struct fbcon_ops *ops = NULL;
735 int err = 0;
736
737 if (!try_module_get(info->fbops->owner))
738 err = -ENODEV;
739
740 if (!err && info->fbops->fb_open &&
741 info->fbops->fb_open(info, 0))
742 err = -ENODEV;
743
744 if (!err) {
745 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
746 if (!ops)
747 err = -ENOMEM;
748 }
749
750 if (!err) {
751 info->fbcon_par = ops;
752
753 if (vc)
754 set_blitting_type(vc, info);
755 }
756
757 if (err) {
758 con2fb_map[unit] = oldidx;
759 module_put(info->fbops->owner);
760 }
761
762 return err;
763 }
764
765 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
766 struct fb_info *newinfo, int unit,
767 int oldidx, int found)
768 {
769 struct fbcon_ops *ops = oldinfo->fbcon_par;
770 int err = 0;
771
772 if (oldinfo->fbops->fb_release &&
773 oldinfo->fbops->fb_release(oldinfo, 0)) {
774 con2fb_map[unit] = oldidx;
775 if (!found && newinfo->fbops->fb_release)
776 newinfo->fbops->fb_release(newinfo, 0);
777 if (!found)
778 module_put(newinfo->fbops->owner);
779 err = -ENODEV;
780 }
781
782 if (!err) {
783 fbcon_del_cursor_timer(oldinfo);
784 kfree(ops->cursor_state.mask);
785 kfree(ops->cursor_data);
786 kfree(ops->fontbuffer);
787 kfree(oldinfo->fbcon_par);
788 oldinfo->fbcon_par = NULL;
789 module_put(oldinfo->fbops->owner);
790 /*
791 If oldinfo and newinfo are driving the same hardware,
792 the fb_release() method of oldinfo may attempt to
793 restore the hardware state. This will leave the
794 newinfo in an undefined state. Thus, a call to
795 fb_set_par() may be needed for the newinfo.
796 */
797 if (newinfo->fbops->fb_set_par)
798 newinfo->fbops->fb_set_par(newinfo);
799 }
800
801 return err;
802 }
803
804 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
805 int unit, int show_logo)
806 {
807 struct fbcon_ops *ops = info->fbcon_par;
808
809 ops->currcon = fg_console;
810
811 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
812 info->fbops->fb_set_par(info);
813
814 ops->flags |= FBCON_FLAGS_INIT;
815 ops->graphics = 0;
816 fbcon_set_disp(info, &info->var, unit);
817
818 if (show_logo) {
819 struct vc_data *fg_vc = vc_cons[fg_console].d;
820 struct fb_info *fg_info =
821 registered_fb[con2fb_map[fg_console]];
822
823 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
824 fg_vc->vc_rows, fg_vc->vc_cols,
825 fg_vc->vc_rows);
826 }
827
828 update_screen(vc_cons[fg_console].d);
829 }
830
831 /**
832 * set_con2fb_map - map console to frame buffer device
833 * @unit: virtual console number to map
834 * @newidx: frame buffer index to map virtual console to
835 * @user: user request
836 *
837 * Maps a virtual console @unit to a frame buffer device
838 * @newidx.
839 */
840 static int set_con2fb_map(int unit, int newidx, int user)
841 {
842 struct vc_data *vc = vc_cons[unit].d;
843 int oldidx = con2fb_map[unit];
844 struct fb_info *info = registered_fb[newidx];
845 struct fb_info *oldinfo = NULL;
846 int found, err = 0;
847
848 if (oldidx == newidx)
849 return 0;
850
851 if (!info || fbcon_has_exited)
852 return -EINVAL;
853
854 if (!err && !search_for_mapped_con()) {
855 info_idx = newidx;
856 return fbcon_takeover(0);
857 }
858
859 if (oldidx != -1)
860 oldinfo = registered_fb[oldidx];
861
862 found = search_fb_in_map(newidx);
863
864 acquire_console_sem();
865 con2fb_map[unit] = newidx;
866 if (!err && !found)
867 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
868
869
870 /*
871 * If old fb is not mapped to any of the consoles,
872 * fbcon should release it.
873 */
874 if (!err && oldinfo && !search_fb_in_map(oldidx))
875 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
876 found);
877
878 if (!err) {
879 int show_logo = (fg_console == 0 && !user &&
880 logo_shown != FBCON_LOGO_DONTSHOW);
881
882 if (!found)
883 fbcon_add_cursor_timer(info);
884 con2fb_map_boot[unit] = newidx;
885 con2fb_init_display(vc, info, unit, show_logo);
886 }
887
888 if (!search_fb_in_map(info_idx))
889 info_idx = newidx;
890
891 release_console_sem();
892 return err;
893 }
894
895 /*
896 * Low Level Operations
897 */
898 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
899 static int var_to_display(struct display *disp,
900 struct fb_var_screeninfo *var,
901 struct fb_info *info)
902 {
903 disp->xres_virtual = var->xres_virtual;
904 disp->yres_virtual = var->yres_virtual;
905 disp->bits_per_pixel = var->bits_per_pixel;
906 disp->grayscale = var->grayscale;
907 disp->nonstd = var->nonstd;
908 disp->accel_flags = var->accel_flags;
909 disp->height = var->height;
910 disp->width = var->width;
911 disp->red = var->red;
912 disp->green = var->green;
913 disp->blue = var->blue;
914 disp->transp = var->transp;
915 disp->rotate = var->rotate;
916 disp->mode = fb_match_mode(var, &info->modelist);
917 if (disp->mode == NULL)
918 /* This should not happen */
919 return -EINVAL;
920 return 0;
921 }
922
923 static void display_to_var(struct fb_var_screeninfo *var,
924 struct display *disp)
925 {
926 fb_videomode_to_var(var, disp->mode);
927 var->xres_virtual = disp->xres_virtual;
928 var->yres_virtual = disp->yres_virtual;
929 var->bits_per_pixel = disp->bits_per_pixel;
930 var->grayscale = disp->grayscale;
931 var->nonstd = disp->nonstd;
932 var->accel_flags = disp->accel_flags;
933 var->height = disp->height;
934 var->width = disp->width;
935 var->red = disp->red;
936 var->green = disp->green;
937 var->blue = disp->blue;
938 var->transp = disp->transp;
939 var->rotate = disp->rotate;
940 }
941
942 static const char *fbcon_startup(void)
943 {
944 const char *display_desc = "frame buffer device";
945 struct display *p = &fb_display[fg_console];
946 struct vc_data *vc = vc_cons[fg_console].d;
947 const struct font_desc *font = NULL;
948 struct module *owner;
949 struct fb_info *info = NULL;
950 struct fbcon_ops *ops;
951 int rows, cols;
952 int irqres;
953
954 irqres = 1;
955 /*
956 * If num_registered_fb is zero, this is a call for the dummy part.
957 * The frame buffer devices weren't initialized yet.
958 */
959 if (!num_registered_fb || info_idx == -1)
960 return display_desc;
961 /*
962 * Instead of blindly using registered_fb[0], we use info_idx, set by
963 * fb_console_init();
964 */
965 info = registered_fb[info_idx];
966 if (!info)
967 return NULL;
968
969 owner = info->fbops->owner;
970 if (!try_module_get(owner))
971 return NULL;
972 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
973 module_put(owner);
974 return NULL;
975 }
976
977 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
978 if (!ops) {
979 module_put(owner);
980 return NULL;
981 }
982
983 ops->currcon = -1;
984 ops->graphics = 1;
985 ops->cur_rotate = -1;
986 info->fbcon_par = ops;
987 p->con_rotate = initial_rotation;
988 set_blitting_type(vc, info);
989
990 if (info->fix.type != FB_TYPE_TEXT) {
991 if (fbcon_softback_size) {
992 if (!softback_buf) {
993 softback_buf =
994 (unsigned long)
995 kmalloc(fbcon_softback_size,
996 GFP_KERNEL);
997 if (!softback_buf) {
998 fbcon_softback_size = 0;
999 softback_top = 0;
1000 }
1001 }
1002 } else {
1003 if (softback_buf) {
1004 kfree((void *) softback_buf);
1005 softback_buf = 0;
1006 softback_top = 0;
1007 }
1008 }
1009 if (softback_buf)
1010 softback_in = softback_top = softback_curr =
1011 softback_buf;
1012 softback_lines = 0;
1013 }
1014
1015 /* Setup default font */
1016 if (!p->fontdata) {
1017 if (!fontname[0] || !(font = find_font(fontname)))
1018 font = get_default_font(info->var.xres,
1019 info->var.yres,
1020 info->pixmap.blit_x,
1021 info->pixmap.blit_y);
1022 vc->vc_font.width = font->width;
1023 vc->vc_font.height = font->height;
1024 vc->vc_font.data = (void *)(p->fontdata = font->data);
1025 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1026 }
1027
1028 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1029 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1030 cols /= vc->vc_font.width;
1031 rows /= vc->vc_font.height;
1032 vc_resize(vc, cols, rows);
1033
1034 DPRINTK("mode: %s\n", info->fix.id);
1035 DPRINTK("visual: %d\n", info->fix.visual);
1036 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1037 info->var.yres,
1038 info->var.bits_per_pixel);
1039
1040 #ifdef CONFIG_ATARI
1041 if (MACH_IS_ATARI) {
1042 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1043 irqres =
1044 request_irq(IRQ_AUTO_4, fb_vbl_handler,
1045 IRQ_TYPE_PRIO, "framebuffer vbl",
1046 info);
1047 }
1048 #endif /* CONFIG_ATARI */
1049
1050 #ifdef CONFIG_MAC
1051 /*
1052 * On a Macintoy, the VBL interrupt may or may not be active.
1053 * As interrupt based cursor is more reliable and race free, we
1054 * probe for VBL interrupts.
1055 */
1056 if (MACH_IS_MAC) {
1057 int ct = 0;
1058 /*
1059 * Probe for VBL: set temp. handler ...
1060 */
1061 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1062 "framebuffer vbl", info);
1063 vbl_detected = 0;
1064
1065 /*
1066 * ... and spin for 20 ms ...
1067 */
1068 while (!vbl_detected && ++ct < 1000)
1069 udelay(20);
1070
1071 if (ct == 1000)
1072 printk
1073 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1074
1075 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1076
1077 if (vbl_detected) {
1078 /*
1079 * interrupt based cursor ok
1080 */
1081 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1082 irqres =
1083 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1084 "framebuffer vbl", info);
1085 } else {
1086 /*
1087 * VBL not detected: fall through, use timer based cursor
1088 */
1089 irqres = 1;
1090 }
1091 }
1092 #endif /* CONFIG_MAC */
1093
1094 fbcon_add_cursor_timer(info);
1095 fbcon_has_exited = 0;
1096 return display_desc;
1097 }
1098
1099 static void fbcon_init(struct vc_data *vc, int init)
1100 {
1101 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1102 struct fbcon_ops *ops;
1103 struct vc_data **default_mode = vc->vc_display_fg;
1104 struct vc_data *svc = *default_mode;
1105 struct display *t, *p = &fb_display[vc->vc_num];
1106 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1107 int cap;
1108
1109 if (info_idx == -1 || info == NULL)
1110 return;
1111
1112 cap = info->flags;
1113
1114 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1115 (info->fix.type == FB_TYPE_TEXT))
1116 logo = 0;
1117
1118 if (var_to_display(p, &info->var, info))
1119 return;
1120
1121 if (!info->fbcon_par)
1122 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1123
1124 /* If we are not the first console on this
1125 fb, copy the font from that console */
1126 t = &fb_display[fg_console];
1127 if (!p->fontdata) {
1128 if (t->fontdata) {
1129 struct vc_data *fvc = vc_cons[fg_console].d;
1130
1131 vc->vc_font.data = (void *)(p->fontdata =
1132 fvc->vc_font.data);
1133 vc->vc_font.width = fvc->vc_font.width;
1134 vc->vc_font.height = fvc->vc_font.height;
1135 p->userfont = t->userfont;
1136
1137 if (p->userfont)
1138 REFCOUNT(p->fontdata)++;
1139 } else {
1140 const struct font_desc *font = NULL;
1141
1142 if (!fontname[0] || !(font = find_font(fontname)))
1143 font = get_default_font(info->var.xres,
1144 info->var.yres,
1145 info->pixmap.blit_x,
1146 info->pixmap.blit_y);
1147 vc->vc_font.width = font->width;
1148 vc->vc_font.height = font->height;
1149 vc->vc_font.data = (void *)(p->fontdata = font->data);
1150 vc->vc_font.charcount = 256; /* FIXME Need to
1151 support more fonts */
1152 }
1153 }
1154
1155 if (p->userfont)
1156 charcnt = FNTCHARCNT(p->fontdata);
1157
1158 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1159 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1160 if (charcnt == 256) {
1161 vc->vc_hi_font_mask = 0;
1162 } else {
1163 vc->vc_hi_font_mask = 0x100;
1164 if (vc->vc_can_do_color)
1165 vc->vc_complement_mask <<= 1;
1166 }
1167
1168 if (!*svc->vc_uni_pagedir_loc)
1169 con_set_default_unimap(svc);
1170 if (!*vc->vc_uni_pagedir_loc)
1171 con_copy_unimap(vc, svc);
1172
1173 ops = info->fbcon_par;
1174 p->con_rotate = initial_rotation;
1175 set_blitting_type(vc, info);
1176
1177 cols = vc->vc_cols;
1178 rows = vc->vc_rows;
1179 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1180 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1181 new_cols /= vc->vc_font.width;
1182 new_rows /= vc->vc_font.height;
1183 vc_resize(vc, new_cols, new_rows);
1184
1185 /*
1186 * We must always set the mode. The mode of the previous console
1187 * driver could be in the same resolution but we are using different
1188 * hardware so we have to initialize the hardware.
1189 *
1190 * We need to do it in fbcon_init() to prevent screen corruption.
1191 */
1192 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1193 if (info->fbops->fb_set_par &&
1194 !(ops->flags & FBCON_FLAGS_INIT))
1195 info->fbops->fb_set_par(info);
1196 ops->flags |= FBCON_FLAGS_INIT;
1197 }
1198
1199 ops->graphics = 0;
1200
1201 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1202 !(cap & FBINFO_HWACCEL_DISABLED))
1203 p->scrollmode = SCROLL_MOVE;
1204 else /* default to something safe */
1205 p->scrollmode = SCROLL_REDRAW;
1206
1207 /*
1208 * ++guenther: console.c:vc_allocate() relies on initializing
1209 * vc_{cols,rows}, but we must not set those if we are only
1210 * resizing the console.
1211 */
1212 if (!init) {
1213 vc->vc_cols = new_cols;
1214 vc->vc_rows = new_rows;
1215 }
1216
1217 if (logo)
1218 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1219
1220 if (vc == svc && softback_buf)
1221 fbcon_update_softback(vc);
1222
1223 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1224 ops->rotate = FB_ROTATE_UR;
1225 set_blitting_type(vc, info);
1226 }
1227
1228 ops->p = &fb_display[fg_console];
1229 }
1230
1231 static void fbcon_free_font(struct display *p)
1232 {
1233 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1234 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1235 p->fontdata = NULL;
1236 p->userfont = 0;
1237 }
1238
1239 static void fbcon_deinit(struct vc_data *vc)
1240 {
1241 struct display *p = &fb_display[vc->vc_num];
1242 struct fb_info *info;
1243 struct fbcon_ops *ops;
1244 int idx;
1245
1246 fbcon_free_font(p);
1247 idx = con2fb_map[vc->vc_num];
1248
1249 if (idx == -1)
1250 goto finished;
1251
1252 info = registered_fb[idx];
1253
1254 if (!info)
1255 goto finished;
1256
1257 ops = info->fbcon_par;
1258
1259 if (!ops)
1260 goto finished;
1261
1262 if (CON_IS_VISIBLE(vc))
1263 fbcon_del_cursor_timer(info);
1264
1265 ops->flags &= ~FBCON_FLAGS_INIT;
1266 finished:
1267
1268 if (!con_is_bound(&fb_con))
1269 fbcon_exit();
1270
1271 return;
1272 }
1273
1274 /* ====================================================================== */
1275
1276 /* fbcon_XXX routines - interface used by the world
1277 *
1278 * This system is now divided into two levels because of complications
1279 * caused by hardware scrolling. Top level functions:
1280 *
1281 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1282 *
1283 * handles y values in range [0, scr_height-1] that correspond to real
1284 * screen positions. y_wrap shift means that first line of bitmap may be
1285 * anywhere on this display. These functions convert lineoffsets to
1286 * bitmap offsets and deal with the wrap-around case by splitting blits.
1287 *
1288 * fbcon_bmove_physical_8() -- These functions fast implementations
1289 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1290 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1291 *
1292 * WARNING:
1293 *
1294 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1295 * Implies should only really hardware scroll in rows. Only reason for
1296 * restriction is simplicity & efficiency at the moment.
1297 */
1298
1299 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1300 int width)
1301 {
1302 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1303 struct fbcon_ops *ops = info->fbcon_par;
1304
1305 struct display *p = &fb_display[vc->vc_num];
1306 u_int y_break;
1307
1308 if (fbcon_is_inactive(vc, info))
1309 return;
1310
1311 if (!height || !width)
1312 return;
1313
1314 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1315 vc->vc_top = 0;
1316
1317 /* Split blits that cross physical y_wrap boundary */
1318
1319 y_break = p->vrows - p->yscroll;
1320 if (sy < y_break && sy + height - 1 >= y_break) {
1321 u_int b = y_break - sy;
1322 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1323 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1324 width);
1325 } else
1326 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1327 }
1328
1329 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1330 int count, int ypos, int xpos)
1331 {
1332 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1333 struct display *p = &fb_display[vc->vc_num];
1334 struct fbcon_ops *ops = info->fbcon_par;
1335
1336 if (!fbcon_is_inactive(vc, info))
1337 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1338 get_color(vc, info, scr_readw(s), 1),
1339 get_color(vc, info, scr_readw(s), 0));
1340 }
1341
1342 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1343 {
1344 unsigned short chr;
1345
1346 scr_writew(c, &chr);
1347 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1348 }
1349
1350 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1351 {
1352 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1353 struct fbcon_ops *ops = info->fbcon_par;
1354
1355 if (!fbcon_is_inactive(vc, info))
1356 ops->clear_margins(vc, info, bottom_only);
1357 }
1358
1359 static void fbcon_cursor(struct vc_data *vc, int mode)
1360 {
1361 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1362 struct fbcon_ops *ops = info->fbcon_par;
1363 int y;
1364 int c = scr_readw((u16 *) vc->vc_pos);
1365
1366 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1367 return;
1368
1369 if (vc->vc_cursor_type & 0x10)
1370 fbcon_del_cursor_timer(info);
1371 else
1372 fbcon_add_cursor_timer(info);
1373
1374 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1375 if (mode & CM_SOFTBACK) {
1376 mode &= ~CM_SOFTBACK;
1377 y = softback_lines;
1378 } else {
1379 if (softback_lines)
1380 fbcon_set_origin(vc);
1381 y = 0;
1382 }
1383
1384 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1385 get_color(vc, info, c, 0));
1386 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1387 }
1388
1389 static int scrollback_phys_max = 0;
1390 static int scrollback_max = 0;
1391 static int scrollback_current = 0;
1392
1393 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1394 int unit)
1395 {
1396 struct display *p, *t;
1397 struct vc_data **default_mode, *vc;
1398 struct vc_data *svc;
1399 struct fbcon_ops *ops = info->fbcon_par;
1400 int rows, cols, charcnt = 256;
1401
1402 p = &fb_display[unit];
1403
1404 if (var_to_display(p, var, info))
1405 return;
1406
1407 vc = vc_cons[unit].d;
1408
1409 if (!vc)
1410 return;
1411
1412 default_mode = vc->vc_display_fg;
1413 svc = *default_mode;
1414 t = &fb_display[svc->vc_num];
1415
1416 if (!vc->vc_font.data) {
1417 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1418 vc->vc_font.width = (*default_mode)->vc_font.width;
1419 vc->vc_font.height = (*default_mode)->vc_font.height;
1420 p->userfont = t->userfont;
1421 if (p->userfont)
1422 REFCOUNT(p->fontdata)++;
1423 }
1424 if (p->userfont)
1425 charcnt = FNTCHARCNT(p->fontdata);
1426
1427 var->activate = FB_ACTIVATE_NOW;
1428 info->var.activate = var->activate;
1429 var->yoffset = info->var.yoffset;
1430 var->xoffset = info->var.xoffset;
1431 fb_set_var(info, var);
1432 ops->var = info->var;
1433 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1434 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1435 if (charcnt == 256) {
1436 vc->vc_hi_font_mask = 0;
1437 } else {
1438 vc->vc_hi_font_mask = 0x100;
1439 if (vc->vc_can_do_color)
1440 vc->vc_complement_mask <<= 1;
1441 }
1442
1443 if (!*svc->vc_uni_pagedir_loc)
1444 con_set_default_unimap(svc);
1445 if (!*vc->vc_uni_pagedir_loc)
1446 con_copy_unimap(vc, svc);
1447
1448 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1449 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1450 cols /= vc->vc_font.width;
1451 rows /= vc->vc_font.height;
1452 vc_resize(vc, cols, rows);
1453
1454 if (CON_IS_VISIBLE(vc)) {
1455 update_screen(vc);
1456 if (softback_buf)
1457 fbcon_update_softback(vc);
1458 }
1459 }
1460
1461 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1462 {
1463 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1464 struct fbcon_ops *ops = info->fbcon_par;
1465 struct display *p = &fb_display[vc->vc_num];
1466
1467 p->yscroll += count;
1468 if (p->yscroll >= p->vrows) /* Deal with wrap */
1469 p->yscroll -= p->vrows;
1470 ops->var.xoffset = 0;
1471 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1472 ops->var.vmode |= FB_VMODE_YWRAP;
1473 ops->update_start(info);
1474 scrollback_max += count;
1475 if (scrollback_max > scrollback_phys_max)
1476 scrollback_max = scrollback_phys_max;
1477 scrollback_current = 0;
1478 }
1479
1480 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1481 {
1482 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1483 struct fbcon_ops *ops = info->fbcon_par;
1484 struct display *p = &fb_display[vc->vc_num];
1485
1486 p->yscroll -= count;
1487 if (p->yscroll < 0) /* Deal with wrap */
1488 p->yscroll += p->vrows;
1489 ops->var.xoffset = 0;
1490 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1491 ops->var.vmode |= FB_VMODE_YWRAP;
1492 ops->update_start(info);
1493 scrollback_max -= count;
1494 if (scrollback_max < 0)
1495 scrollback_max = 0;
1496 scrollback_current = 0;
1497 }
1498
1499 static __inline__ void ypan_up(struct vc_data *vc, int count)
1500 {
1501 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1502 struct display *p = &fb_display[vc->vc_num];
1503 struct fbcon_ops *ops = info->fbcon_par;
1504
1505 p->yscroll += count;
1506 if (p->yscroll > p->vrows - vc->vc_rows) {
1507 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1508 0, 0, 0, vc->vc_rows, vc->vc_cols);
1509 p->yscroll -= p->vrows - vc->vc_rows;
1510 }
1511
1512 ops->var.xoffset = 0;
1513 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1514 ops->var.vmode &= ~FB_VMODE_YWRAP;
1515 ops->update_start(info);
1516 fbcon_clear_margins(vc, 1);
1517 scrollback_max += count;
1518 if (scrollback_max > scrollback_phys_max)
1519 scrollback_max = scrollback_phys_max;
1520 scrollback_current = 0;
1521 }
1522
1523 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1524 {
1525 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1526 struct fbcon_ops *ops = info->fbcon_par;
1527 struct display *p = &fb_display[vc->vc_num];
1528
1529 p->yscroll += count;
1530
1531 if (p->yscroll > p->vrows - vc->vc_rows) {
1532 p->yscroll -= p->vrows - vc->vc_rows;
1533 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1534 }
1535
1536 ops->var.xoffset = 0;
1537 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1538 ops->var.vmode &= ~FB_VMODE_YWRAP;
1539 ops->update_start(info);
1540 fbcon_clear_margins(vc, 1);
1541 scrollback_max += count;
1542 if (scrollback_max > scrollback_phys_max)
1543 scrollback_max = scrollback_phys_max;
1544 scrollback_current = 0;
1545 }
1546
1547 static __inline__ void ypan_down(struct vc_data *vc, int count)
1548 {
1549 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1550 struct display *p = &fb_display[vc->vc_num];
1551 struct fbcon_ops *ops = info->fbcon_par;
1552
1553 p->yscroll -= count;
1554 if (p->yscroll < 0) {
1555 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1556 0, vc->vc_rows, vc->vc_cols);
1557 p->yscroll += p->vrows - vc->vc_rows;
1558 }
1559
1560 ops->var.xoffset = 0;
1561 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1562 ops->var.vmode &= ~FB_VMODE_YWRAP;
1563 ops->update_start(info);
1564 fbcon_clear_margins(vc, 1);
1565 scrollback_max -= count;
1566 if (scrollback_max < 0)
1567 scrollback_max = 0;
1568 scrollback_current = 0;
1569 }
1570
1571 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1572 {
1573 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1574 struct fbcon_ops *ops = info->fbcon_par;
1575 struct display *p = &fb_display[vc->vc_num];
1576
1577 p->yscroll -= count;
1578
1579 if (p->yscroll < 0) {
1580 p->yscroll += p->vrows - vc->vc_rows;
1581 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1582 }
1583
1584 ops->var.xoffset = 0;
1585 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1586 ops->var.vmode &= ~FB_VMODE_YWRAP;
1587 ops->update_start(info);
1588 fbcon_clear_margins(vc, 1);
1589 scrollback_max -= count;
1590 if (scrollback_max < 0)
1591 scrollback_max = 0;
1592 scrollback_current = 0;
1593 }
1594
1595 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1596 long delta)
1597 {
1598 int count = vc->vc_rows;
1599 unsigned short *d, *s;
1600 unsigned long n;
1601 int line = 0;
1602
1603 d = (u16 *) softback_curr;
1604 if (d == (u16 *) softback_in)
1605 d = (u16 *) vc->vc_origin;
1606 n = softback_curr + delta * vc->vc_size_row;
1607 softback_lines -= delta;
1608 if (delta < 0) {
1609 if (softback_curr < softback_top && n < softback_buf) {
1610 n += softback_end - softback_buf;
1611 if (n < softback_top) {
1612 softback_lines -=
1613 (softback_top - n) / vc->vc_size_row;
1614 n = softback_top;
1615 }
1616 } else if (softback_curr >= softback_top
1617 && n < softback_top) {
1618 softback_lines -=
1619 (softback_top - n) / vc->vc_size_row;
1620 n = softback_top;
1621 }
1622 } else {
1623 if (softback_curr > softback_in && n >= softback_end) {
1624 n += softback_buf - softback_end;
1625 if (n > softback_in) {
1626 n = softback_in;
1627 softback_lines = 0;
1628 }
1629 } else if (softback_curr <= softback_in && n > softback_in) {
1630 n = softback_in;
1631 softback_lines = 0;
1632 }
1633 }
1634 if (n == softback_curr)
1635 return;
1636 softback_curr = n;
1637 s = (u16 *) softback_curr;
1638 if (s == (u16 *) softback_in)
1639 s = (u16 *) vc->vc_origin;
1640 while (count--) {
1641 unsigned short *start;
1642 unsigned short *le;
1643 unsigned short c;
1644 int x = 0;
1645 unsigned short attr = 1;
1646
1647 start = s;
1648 le = advance_row(s, 1);
1649 do {
1650 c = scr_readw(s);
1651 if (attr != (c & 0xff00)) {
1652 attr = c & 0xff00;
1653 if (s > start) {
1654 fbcon_putcs(vc, start, s - start,
1655 line, x);
1656 x += s - start;
1657 start = s;
1658 }
1659 }
1660 if (c == scr_readw(d)) {
1661 if (s > start) {
1662 fbcon_putcs(vc, start, s - start,
1663 line, x);
1664 x += s - start + 1;
1665 start = s + 1;
1666 } else {
1667 x++;
1668 start++;
1669 }
1670 }
1671 s++;
1672 d++;
1673 } while (s < le);
1674 if (s > start)
1675 fbcon_putcs(vc, start, s - start, line, x);
1676 line++;
1677 if (d == (u16 *) softback_end)
1678 d = (u16 *) softback_buf;
1679 if (d == (u16 *) softback_in)
1680 d = (u16 *) vc->vc_origin;
1681 if (s == (u16 *) softback_end)
1682 s = (u16 *) softback_buf;
1683 if (s == (u16 *) softback_in)
1684 s = (u16 *) vc->vc_origin;
1685 }
1686 }
1687
1688 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1689 int line, int count, int dy)
1690 {
1691 unsigned short *s = (unsigned short *)
1692 (vc->vc_origin + vc->vc_size_row * line);
1693
1694 while (count--) {
1695 unsigned short *start = s;
1696 unsigned short *le = advance_row(s, 1);
1697 unsigned short c;
1698 int x = 0;
1699 unsigned short attr = 1;
1700
1701 do {
1702 c = scr_readw(s);
1703 if (attr != (c & 0xff00)) {
1704 attr = c & 0xff00;
1705 if (s > start) {
1706 fbcon_putcs(vc, start, s - start,
1707 dy, x);
1708 x += s - start;
1709 start = s;
1710 }
1711 }
1712 console_conditional_schedule();
1713 s++;
1714 } while (s < le);
1715 if (s > start)
1716 fbcon_putcs(vc, start, s - start, dy, x);
1717 console_conditional_schedule();
1718 dy++;
1719 }
1720 }
1721
1722 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1723 struct display *p, int line, int count, int ycount)
1724 {
1725 int offset = ycount * vc->vc_cols;
1726 unsigned short *d = (unsigned short *)
1727 (vc->vc_origin + vc->vc_size_row * line);
1728 unsigned short *s = d + offset;
1729 struct fbcon_ops *ops = info->fbcon_par;
1730
1731 while (count--) {
1732 unsigned short *start = s;
1733 unsigned short *le = advance_row(s, 1);
1734 unsigned short c;
1735 int x = 0;
1736
1737 do {
1738 c = scr_readw(s);
1739
1740 if (c == scr_readw(d)) {
1741 if (s > start) {
1742 ops->bmove(vc, info, line + ycount, x,
1743 line, x, 1, s-start);
1744 x += s - start + 1;
1745 start = s + 1;
1746 } else {
1747 x++;
1748 start++;
1749 }
1750 }
1751
1752 scr_writew(c, d);
1753 console_conditional_schedule();
1754 s++;
1755 d++;
1756 } while (s < le);
1757 if (s > start)
1758 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1759 s-start);
1760 console_conditional_schedule();
1761 if (ycount > 0)
1762 line++;
1763 else {
1764 line--;
1765 /* NOTE: We subtract two lines from these pointers */
1766 s -= vc->vc_size_row;
1767 d -= vc->vc_size_row;
1768 }
1769 }
1770 }
1771
1772 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1773 int line, int count, int offset)
1774 {
1775 unsigned short *d = (unsigned short *)
1776 (vc->vc_origin + vc->vc_size_row * line);
1777 unsigned short *s = d + offset;
1778
1779 while (count--) {
1780 unsigned short *start = s;
1781 unsigned short *le = advance_row(s, 1);
1782 unsigned short c;
1783 int x = 0;
1784 unsigned short attr = 1;
1785
1786 do {
1787 c = scr_readw(s);
1788 if (attr != (c & 0xff00)) {
1789 attr = c & 0xff00;
1790 if (s > start) {
1791 fbcon_putcs(vc, start, s - start,
1792 line, x);
1793 x += s - start;
1794 start = s;
1795 }
1796 }
1797 if (c == scr_readw(d)) {
1798 if (s > start) {
1799 fbcon_putcs(vc, start, s - start,
1800 line, x);
1801 x += s - start + 1;
1802 start = s + 1;
1803 } else {
1804 x++;
1805 start++;
1806 }
1807 }
1808 scr_writew(c, d);
1809 console_conditional_schedule();
1810 s++;
1811 d++;
1812 } while (s < le);
1813 if (s > start)
1814 fbcon_putcs(vc, start, s - start, line, x);
1815 console_conditional_schedule();
1816 if (offset > 0)
1817 line++;
1818 else {
1819 line--;
1820 /* NOTE: We subtract two lines from these pointers */
1821 s -= vc->vc_size_row;
1822 d -= vc->vc_size_row;
1823 }
1824 }
1825 }
1826
1827 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1828 int count)
1829 {
1830 unsigned short *p;
1831
1832 if (vc->vc_num != fg_console)
1833 return;
1834 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1835
1836 while (count) {
1837 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1838 count--;
1839 p = advance_row(p, 1);
1840 softback_in += vc->vc_size_row;
1841 if (softback_in == softback_end)
1842 softback_in = softback_buf;
1843 if (softback_in == softback_top) {
1844 softback_top += vc->vc_size_row;
1845 if (softback_top == softback_end)
1846 softback_top = softback_buf;
1847 }
1848 }
1849 softback_curr = softback_in;
1850 }
1851
1852 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1853 int count)
1854 {
1855 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1856 struct display *p = &fb_display[vc->vc_num];
1857 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
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 switch (dir) {
1871 case SM_UP:
1872 if (count > vc->vc_rows) /* Maximum realistic size */
1873 count = vc->vc_rows;
1874 if (softback_top)
1875 fbcon_softback_note(vc, t, count);
1876 if (logo_shown >= 0)
1877 goto redraw_up;
1878 switch (p->scrollmode) {
1879 case SCROLL_MOVE:
1880 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1881 count);
1882 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1883 scr_memsetw((unsigned short *) (vc->vc_origin +
1884 vc->vc_size_row *
1885 (b - count)),
1886 vc->vc_video_erase_char,
1887 vc->vc_size_row * count);
1888 return 1;
1889 break;
1890
1891 case SCROLL_WRAP_MOVE:
1892 if (b - t - count > 3 * vc->vc_rows >> 2) {
1893 if (t > 0)
1894 fbcon_bmove(vc, 0, 0, count, 0, t,
1895 vc->vc_cols);
1896 ywrap_up(vc, count);
1897 if (vc->vc_rows - b > 0)
1898 fbcon_bmove(vc, b - count, 0, b, 0,
1899 vc->vc_rows - b,
1900 vc->vc_cols);
1901 } else if (info->flags & FBINFO_READS_FAST)
1902 fbcon_bmove(vc, t + count, 0, t, 0,
1903 b - t - count, vc->vc_cols);
1904 else
1905 goto redraw_up;
1906 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1907 break;
1908
1909 case SCROLL_PAN_REDRAW:
1910 if ((p->yscroll + count <=
1911 2 * (p->vrows - vc->vc_rows))
1912 && ((!scroll_partial && (b - t == vc->vc_rows))
1913 || (scroll_partial
1914 && (b - t - count >
1915 3 * vc->vc_rows >> 2)))) {
1916 if (t > 0)
1917 fbcon_redraw_move(vc, p, 0, t, count);
1918 ypan_up_redraw(vc, t, count);
1919 if (vc->vc_rows - b > 0)
1920 fbcon_redraw_move(vc, p, b,
1921 vc->vc_rows - b, b);
1922 } else
1923 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1924 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1925 break;
1926
1927 case SCROLL_PAN_MOVE:
1928 if ((p->yscroll + count <=
1929 2 * (p->vrows - vc->vc_rows))
1930 && ((!scroll_partial && (b - t == vc->vc_rows))
1931 || (scroll_partial
1932 && (b - t - count >
1933 3 * vc->vc_rows >> 2)))) {
1934 if (t > 0)
1935 fbcon_bmove(vc, 0, 0, count, 0, t,
1936 vc->vc_cols);
1937 ypan_up(vc, count);
1938 if (vc->vc_rows - b > 0)
1939 fbcon_bmove(vc, b - count, 0, b, 0,
1940 vc->vc_rows - b,
1941 vc->vc_cols);
1942 } else if (info->flags & FBINFO_READS_FAST)
1943 fbcon_bmove(vc, t + count, 0, t, 0,
1944 b - t - count, vc->vc_cols);
1945 else
1946 goto redraw_up;
1947 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1948 break;
1949
1950 case SCROLL_REDRAW:
1951 redraw_up:
1952 fbcon_redraw(vc, p, t, b - t - count,
1953 count * vc->vc_cols);
1954 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1955 scr_memsetw((unsigned short *) (vc->vc_origin +
1956 vc->vc_size_row *
1957 (b - count)),
1958 vc->vc_video_erase_char,
1959 vc->vc_size_row * count);
1960 return 1;
1961 }
1962 break;
1963
1964 case SM_DOWN:
1965 if (count > vc->vc_rows) /* Maximum realistic size */
1966 count = vc->vc_rows;
1967 if (logo_shown >= 0)
1968 goto redraw_down;
1969 switch (p->scrollmode) {
1970 case SCROLL_MOVE:
1971 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1972 -count);
1973 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1974 scr_memsetw((unsigned short *) (vc->vc_origin +
1975 vc->vc_size_row *
1976 t),
1977 vc->vc_video_erase_char,
1978 vc->vc_size_row * count);
1979 return 1;
1980 break;
1981
1982 case SCROLL_WRAP_MOVE:
1983 if (b - t - count > 3 * vc->vc_rows >> 2) {
1984 if (vc->vc_rows - b > 0)
1985 fbcon_bmove(vc, b, 0, b - count, 0,
1986 vc->vc_rows - b,
1987 vc->vc_cols);
1988 ywrap_down(vc, count);
1989 if (t > 0)
1990 fbcon_bmove(vc, count, 0, 0, 0, t,
1991 vc->vc_cols);
1992 } else if (info->flags & FBINFO_READS_FAST)
1993 fbcon_bmove(vc, t, 0, t + count, 0,
1994 b - t - count, vc->vc_cols);
1995 else
1996 goto redraw_down;
1997 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1998 break;
1999
2000 case SCROLL_PAN_MOVE:
2001 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2002 && ((!scroll_partial && (b - t == vc->vc_rows))
2003 || (scroll_partial
2004 && (b - t - count >
2005 3 * vc->vc_rows >> 2)))) {
2006 if (vc->vc_rows - b > 0)
2007 fbcon_bmove(vc, b, 0, b - count, 0,
2008 vc->vc_rows - b,
2009 vc->vc_cols);
2010 ypan_down(vc, count);
2011 if (t > 0)
2012 fbcon_bmove(vc, count, 0, 0, 0, t,
2013 vc->vc_cols);
2014 } else if (info->flags & FBINFO_READS_FAST)
2015 fbcon_bmove(vc, t, 0, t + count, 0,
2016 b - t - count, vc->vc_cols);
2017 else
2018 goto redraw_down;
2019 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2020 break;
2021
2022 case SCROLL_PAN_REDRAW:
2023 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2024 && ((!scroll_partial && (b - t == vc->vc_rows))
2025 || (scroll_partial
2026 && (b - t - count >
2027 3 * vc->vc_rows >> 2)))) {
2028 if (vc->vc_rows - b > 0)
2029 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2030 b - count);
2031 ypan_down_redraw(vc, t, count);
2032 if (t > 0)
2033 fbcon_redraw_move(vc, p, count, t, 0);
2034 } else
2035 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2036 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2037 break;
2038
2039 case SCROLL_REDRAW:
2040 redraw_down:
2041 fbcon_redraw(vc, p, b - 1, b - t - count,
2042 -count * vc->vc_cols);
2043 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2044 scr_memsetw((unsigned short *) (vc->vc_origin +
2045 vc->vc_size_row *
2046 t),
2047 vc->vc_video_erase_char,
2048 vc->vc_size_row * count);
2049 return 1;
2050 }
2051 }
2052 return 0;
2053 }
2054
2055
2056 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2057 int height, int width)
2058 {
2059 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2060 struct display *p = &fb_display[vc->vc_num];
2061
2062 if (fbcon_is_inactive(vc, info))
2063 return;
2064
2065 if (!width || !height)
2066 return;
2067
2068 /* Split blits that cross physical y_wrap case.
2069 * Pathological case involves 4 blits, better to use recursive
2070 * code rather than unrolled case
2071 *
2072 * Recursive invocations don't need to erase the cursor over and
2073 * over again, so we use fbcon_bmove_rec()
2074 */
2075 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2076 p->vrows - p->yscroll);
2077 }
2078
2079 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2080 int dy, int dx, int height, int width, u_int y_break)
2081 {
2082 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2083 struct fbcon_ops *ops = info->fbcon_par;
2084 u_int b;
2085
2086 if (sy < y_break && sy + height > y_break) {
2087 b = y_break - sy;
2088 if (dy < sy) { /* Avoid trashing self */
2089 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2090 y_break);
2091 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2092 height - b, width, y_break);
2093 } else {
2094 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2095 height - b, width, y_break);
2096 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2097 y_break);
2098 }
2099 return;
2100 }
2101
2102 if (dy < y_break && dy + height > y_break) {
2103 b = y_break - dy;
2104 if (dy < sy) { /* Avoid trashing self */
2105 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2106 y_break);
2107 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2108 height - b, width, y_break);
2109 } else {
2110 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2111 height - b, width, y_break);
2112 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2113 y_break);
2114 }
2115 return;
2116 }
2117 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2118 height, width);
2119 }
2120
2121 static void updatescrollmode(struct display *p,
2122 struct fb_info *info,
2123 struct vc_data *vc)
2124 {
2125 struct fbcon_ops *ops = info->fbcon_par;
2126 int fh = vc->vc_font.height;
2127 int cap = info->flags;
2128 u16 t = 0;
2129 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2130 info->fix.xpanstep);
2131 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2132 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2133 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2134 info->var.xres_virtual);
2135 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2136 divides(ypan, vc->vc_font.height) && vyres > yres;
2137 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2138 divides(ywrap, vc->vc_font.height) &&
2139 divides(vc->vc_font.height, vyres) &&
2140 divides(vc->vc_font.height, yres);
2141 int reading_fast = cap & FBINFO_READS_FAST;
2142 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2143 !(cap & FBINFO_HWACCEL_DISABLED);
2144 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2145 !(cap & FBINFO_HWACCEL_DISABLED);
2146
2147 p->vrows = vyres/fh;
2148 if (yres > (fh * (vc->vc_rows + 1)))
2149 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2150 if ((yres % fh) && (vyres % fh < yres % fh))
2151 p->vrows--;
2152
2153 if (good_wrap || good_pan) {
2154 if (reading_fast || fast_copyarea)
2155 p->scrollmode = good_wrap ?
2156 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2157 else
2158 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2159 SCROLL_PAN_REDRAW;
2160 } else {
2161 if (reading_fast || (fast_copyarea && !fast_imageblit))
2162 p->scrollmode = SCROLL_MOVE;
2163 else
2164 p->scrollmode = SCROLL_REDRAW;
2165 }
2166 }
2167
2168 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2169 unsigned int height, unsigned int user)
2170 {
2171 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2172 struct fbcon_ops *ops = info->fbcon_par;
2173 struct display *p = &fb_display[vc->vc_num];
2174 struct fb_var_screeninfo var = info->var;
2175 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2176
2177 virt_w = FBCON_SWAP(ops->rotate, width, height);
2178 virt_h = FBCON_SWAP(ops->rotate, height, width);
2179 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2180 vc->vc_font.height);
2181 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2182 vc->vc_font.width);
2183 var.xres = virt_w * virt_fw;
2184 var.yres = virt_h * virt_fh;
2185 x_diff = info->var.xres - var.xres;
2186 y_diff = info->var.yres - var.yres;
2187 if (x_diff < 0 || x_diff > virt_fw ||
2188 y_diff < 0 || y_diff > virt_fh) {
2189 const struct fb_videomode *mode;
2190
2191 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2192 mode = fb_find_best_mode(&var, &info->modelist);
2193 if (mode == NULL)
2194 return -EINVAL;
2195 display_to_var(&var, p);
2196 fb_videomode_to_var(&var, mode);
2197
2198 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2199 return -EINVAL;
2200
2201 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2202 if (CON_IS_VISIBLE(vc)) {
2203 var.activate = FB_ACTIVATE_NOW |
2204 FB_ACTIVATE_FORCE;
2205 fb_set_var(info, &var);
2206 }
2207 var_to_display(p, &info->var, info);
2208 ops->var = info->var;
2209 }
2210 updatescrollmode(p, info, vc);
2211 return 0;
2212 }
2213
2214 static int fbcon_switch(struct vc_data *vc)
2215 {
2216 struct fb_info *info, *old_info = NULL;
2217 struct fbcon_ops *ops;
2218 struct display *p = &fb_display[vc->vc_num];
2219 struct fb_var_screeninfo var;
2220 int i, prev_console, charcnt = 256;
2221
2222 info = registered_fb[con2fb_map[vc->vc_num]];
2223 ops = info->fbcon_par;
2224
2225 if (softback_top) {
2226 if (softback_lines)
2227 fbcon_set_origin(vc);
2228 softback_top = softback_curr = softback_in = softback_buf;
2229 softback_lines = 0;
2230 fbcon_update_softback(vc);
2231 }
2232
2233 if (logo_shown >= 0) {
2234 struct vc_data *conp2 = vc_cons[logo_shown].d;
2235
2236 if (conp2->vc_top == logo_lines
2237 && conp2->vc_bottom == conp2->vc_rows)
2238 conp2->vc_top = 0;
2239 logo_shown = FBCON_LOGO_CANSHOW;
2240 }
2241
2242 prev_console = ops->currcon;
2243 if (prev_console != -1)
2244 old_info = registered_fb[con2fb_map[prev_console]];
2245 /*
2246 * FIXME: If we have multiple fbdev's loaded, we need to
2247 * update all info->currcon. Perhaps, we can place this
2248 * in a centralized structure, but this might break some
2249 * drivers.
2250 *
2251 * info->currcon = vc->vc_num;
2252 */
2253 for (i = 0; i < FB_MAX; i++) {
2254 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2255 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2256
2257 o->currcon = vc->vc_num;
2258 }
2259 }
2260 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2261 display_to_var(&var, p);
2262 var.activate = FB_ACTIVATE_NOW;
2263
2264 /*
2265 * make sure we don't unnecessarily trip the memcmp()
2266 * in fb_set_var()
2267 */
2268 info->var.activate = var.activate;
2269 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2270 fb_set_var(info, &var);
2271 ops->var = info->var;
2272
2273 if (old_info != NULL && (old_info != info ||
2274 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2275 if (info->fbops->fb_set_par)
2276 info->fbops->fb_set_par(info);
2277
2278 if (old_info != info)
2279 fbcon_del_cursor_timer(old_info);
2280 }
2281
2282 if (fbcon_is_inactive(vc, info) ||
2283 ops->blank_state != FB_BLANK_UNBLANK)
2284 fbcon_del_cursor_timer(info);
2285 else
2286 fbcon_add_cursor_timer(info);
2287
2288 set_blitting_type(vc, info);
2289 ops->cursor_reset = 1;
2290
2291 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2292 ops->rotate = FB_ROTATE_UR;
2293 set_blitting_type(vc, info);
2294 }
2295
2296 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2297 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2298
2299 if (p->userfont)
2300 charcnt = FNTCHARCNT(vc->vc_font.data);
2301
2302 if (charcnt > 256)
2303 vc->vc_complement_mask <<= 1;
2304
2305 updatescrollmode(p, info, vc);
2306
2307 switch (p->scrollmode) {
2308 case SCROLL_WRAP_MOVE:
2309 scrollback_phys_max = p->vrows - vc->vc_rows;
2310 break;
2311 case SCROLL_PAN_MOVE:
2312 case SCROLL_PAN_REDRAW:
2313 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2314 if (scrollback_phys_max < 0)
2315 scrollback_phys_max = 0;
2316 break;
2317 default:
2318 scrollback_phys_max = 0;
2319 break;
2320 }
2321
2322 scrollback_max = 0;
2323 scrollback_current = 0;
2324
2325 if (!fbcon_is_inactive(vc, info)) {
2326 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2327 ops->update_start(info);
2328 }
2329
2330 fbcon_set_palette(vc, color_table);
2331 fbcon_clear_margins(vc, 0);
2332
2333 if (logo_shown == FBCON_LOGO_DRAW) {
2334
2335 logo_shown = fg_console;
2336 /* This is protected above by initmem_freed */
2337 fb_show_logo(info, ops->rotate);
2338 update_region(vc,
2339 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2340 vc->vc_size_row * (vc->vc_bottom -
2341 vc->vc_top) / 2);
2342 return 0;
2343 }
2344 return 1;
2345 }
2346
2347 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2348 int blank)
2349 {
2350 struct fb_event event;
2351
2352 if (blank) {
2353 unsigned short charmask = vc->vc_hi_font_mask ?
2354 0x1ff : 0xff;
2355 unsigned short oldc;
2356
2357 oldc = vc->vc_video_erase_char;
2358 vc->vc_video_erase_char &= charmask;
2359 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2360 vc->vc_video_erase_char = oldc;
2361 }
2362
2363
2364 event.info = info;
2365 event.data = &blank;
2366 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2367 }
2368
2369 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2370 {
2371 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2372 struct fbcon_ops *ops = info->fbcon_par;
2373
2374 if (mode_switch) {
2375 struct fb_var_screeninfo var = info->var;
2376
2377 ops->graphics = 1;
2378
2379 if (!blank) {
2380 if (info->fbops->fb_save_state)
2381 info->fbops->fb_save_state(info);
2382 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2383 fb_set_var(info, &var);
2384 ops->graphics = 0;
2385 ops->var = info->var;
2386 } else if (info->fbops->fb_restore_state)
2387 info->fbops->fb_restore_state(info);
2388 }
2389
2390 if (!fbcon_is_inactive(vc, info)) {
2391 if (ops->blank_state != blank) {
2392 ops->blank_state = blank;
2393 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2394 ops->cursor_flash = (!blank);
2395
2396 if (!(info->flags & FBINFO_MISC_USEREVENT))
2397 if (fb_blank(info, blank))
2398 fbcon_generic_blank(vc, info, blank);
2399 }
2400
2401 if (!blank)
2402 update_screen(vc);
2403 }
2404
2405 if (mode_switch || fbcon_is_inactive(vc, info) ||
2406 ops->blank_state != FB_BLANK_UNBLANK)
2407 fbcon_del_cursor_timer(info);
2408 else
2409 fbcon_add_cursor_timer(info);
2410
2411 return 0;
2412 }
2413
2414 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2415 {
2416 u8 *fontdata = vc->vc_font.data;
2417 u8 *data = font->data;
2418 int i, j;
2419
2420 font->width = vc->vc_font.width;
2421 font->height = vc->vc_font.height;
2422 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2423 if (!font->data)
2424 return 0;
2425
2426 if (font->width <= 8) {
2427 j = vc->vc_font.height;
2428 for (i = 0; i < font->charcount; i++) {
2429 memcpy(data, fontdata, j);
2430 memset(data + j, 0, 32 - j);
2431 data += 32;
2432 fontdata += j;
2433 }
2434 } else if (font->width <= 16) {
2435 j = vc->vc_font.height * 2;
2436 for (i = 0; i < font->charcount; i++) {
2437 memcpy(data, fontdata, j);
2438 memset(data + j, 0, 64 - j);
2439 data += 64;
2440 fontdata += j;
2441 }
2442 } else if (font->width <= 24) {
2443 for (i = 0; i < font->charcount; i++) {
2444 for (j = 0; j < vc->vc_font.height; j++) {
2445 *data++ = fontdata[0];
2446 *data++ = fontdata[1];
2447 *data++ = fontdata[2];
2448 fontdata += sizeof(u32);
2449 }
2450 memset(data, 0, 3 * (32 - j));
2451 data += 3 * (32 - j);
2452 }
2453 } else {
2454 j = vc->vc_font.height * 4;
2455 for (i = 0; i < font->charcount; i++) {
2456 memcpy(data, fontdata, j);
2457 memset(data + j, 0, 128 - j);
2458 data += 128;
2459 fontdata += j;
2460 }
2461 }
2462 return 0;
2463 }
2464
2465 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2466 const u8 * data, int userfont)
2467 {
2468 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2469 struct fbcon_ops *ops = info->fbcon_par;
2470 struct display *p = &fb_display[vc->vc_num];
2471 int resize;
2472 int cnt;
2473 char *old_data = NULL;
2474
2475 if (CON_IS_VISIBLE(vc) && softback_lines)
2476 fbcon_set_origin(vc);
2477
2478 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2479 if (p->userfont)
2480 old_data = vc->vc_font.data;
2481 if (userfont)
2482 cnt = FNTCHARCNT(data);
2483 else
2484 cnt = 256;
2485 vc->vc_font.data = (void *)(p->fontdata = data);
2486 if ((p->userfont = userfont))
2487 REFCOUNT(data)++;
2488 vc->vc_font.width = w;
2489 vc->vc_font.height = h;
2490 if (vc->vc_hi_font_mask && cnt == 256) {
2491 vc->vc_hi_font_mask = 0;
2492 if (vc->vc_can_do_color) {
2493 vc->vc_complement_mask >>= 1;
2494 vc->vc_s_complement_mask >>= 1;
2495 }
2496
2497 /* ++Edmund: reorder the attribute bits */
2498 if (vc->vc_can_do_color) {
2499 unsigned short *cp =
2500 (unsigned short *) vc->vc_origin;
2501 int count = vc->vc_screenbuf_size / 2;
2502 unsigned short c;
2503 for (; count > 0; count--, cp++) {
2504 c = scr_readw(cp);
2505 scr_writew(((c & 0xfe00) >> 1) |
2506 (c & 0xff), cp);
2507 }
2508 c = vc->vc_video_erase_char;
2509 vc->vc_video_erase_char =
2510 ((c & 0xfe00) >> 1) | (c & 0xff);
2511 vc->vc_attr >>= 1;
2512 }
2513 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2514 vc->vc_hi_font_mask = 0x100;
2515 if (vc->vc_can_do_color) {
2516 vc->vc_complement_mask <<= 1;
2517 vc->vc_s_complement_mask <<= 1;
2518 }
2519
2520 /* ++Edmund: reorder the attribute bits */
2521 {
2522 unsigned short *cp =
2523 (unsigned short *) vc->vc_origin;
2524 int count = vc->vc_screenbuf_size / 2;
2525 unsigned short c;
2526 for (; count > 0; count--, cp++) {
2527 unsigned short newc;
2528 c = scr_readw(cp);
2529 if (vc->vc_can_do_color)
2530 newc =
2531 ((c & 0xff00) << 1) | (c &
2532 0xff);
2533 else
2534 newc = c & ~0x100;
2535 scr_writew(newc, cp);
2536 }
2537 c = vc->vc_video_erase_char;
2538 if (vc->vc_can_do_color) {
2539 vc->vc_video_erase_char =
2540 ((c & 0xff00) << 1) | (c & 0xff);
2541 vc->vc_attr <<= 1;
2542 } else
2543 vc->vc_video_erase_char = c & ~0x100;
2544 }
2545
2546 }
2547
2548 if (resize) {
2549 int cols, rows;
2550
2551 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2552 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2553 cols /= w;
2554 rows /= h;
2555 vc_resize(vc, cols, rows);
2556 if (CON_IS_VISIBLE(vc) && softback_buf)
2557 fbcon_update_softback(vc);
2558 } else if (CON_IS_VISIBLE(vc)
2559 && vc->vc_mode == KD_TEXT) {
2560 fbcon_clear_margins(vc, 0);
2561 update_screen(vc);
2562 }
2563
2564 if (old_data && (--REFCOUNT(old_data) == 0))
2565 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2566 return 0;
2567 }
2568
2569 static int fbcon_copy_font(struct vc_data *vc, int con)
2570 {
2571 struct display *od = &fb_display[con];
2572 struct console_font *f = &vc->vc_font;
2573
2574 if (od->fontdata == f->data)
2575 return 0; /* already the same font... */
2576 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2577 }
2578
2579 /*
2580 * User asked to set font; we are guaranteed that
2581 * a) width and height are in range 1..32
2582 * b) charcount does not exceed 512
2583 * but lets not assume that, since someone might someday want to use larger
2584 * fonts. And charcount of 512 is small for unicode support.
2585 *
2586 * However, user space gives the font in 32 rows , regardless of
2587 * actual font height. So a new API is needed if support for larger fonts
2588 * is ever implemented.
2589 */
2590
2591 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2592 {
2593 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2594 unsigned charcount = font->charcount;
2595 int w = font->width;
2596 int h = font->height;
2597 int size;
2598 int i, csum;
2599 u8 *new_data, *data = font->data;
2600 int pitch = (font->width+7) >> 3;
2601
2602 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2603 * If not this check should be changed to charcount < 256 */
2604 if (charcount != 256 && charcount != 512)
2605 return -EINVAL;
2606
2607 /* Make sure drawing engine can handle the font */
2608 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2609 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2610 return -EINVAL;
2611
2612 /* Make sure driver can handle the font length */
2613 if (fbcon_invalid_charcount(info, charcount))
2614 return -EINVAL;
2615
2616 size = h * pitch * charcount;
2617
2618 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2619
2620 if (!new_data)
2621 return -ENOMEM;
2622
2623 new_data += FONT_EXTRA_WORDS * sizeof(int);
2624 FNTSIZE(new_data) = size;
2625 FNTCHARCNT(new_data) = charcount;
2626 REFCOUNT(new_data) = 0; /* usage counter */
2627 for (i=0; i< charcount; i++) {
2628 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2629 }
2630
2631 /* Since linux has a nice crc32 function use it for counting font
2632 * checksums. */
2633 csum = crc32(0, new_data, size);
2634
2635 FNTSUM(new_data) = csum;
2636 /* Check if the same font is on some other console already */
2637 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2638 struct vc_data *tmp = vc_cons[i].d;
2639
2640 if (fb_display[i].userfont &&
2641 fb_display[i].fontdata &&
2642 FNTSUM(fb_display[i].fontdata) == csum &&
2643 FNTSIZE(fb_display[i].fontdata) == size &&
2644 tmp->vc_font.width == w &&
2645 !memcmp(fb_display[i].fontdata, new_data, size)) {
2646 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2647 new_data = (u8 *)fb_display[i].fontdata;
2648 break;
2649 }
2650 }
2651 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2652 }
2653
2654 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2655 {
2656 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2657 const struct font_desc *f;
2658
2659 if (!name)
2660 f = get_default_font(info->var.xres, info->var.yres,
2661 info->pixmap.blit_x, info->pixmap.blit_y);
2662 else if (!(f = find_font(name)))
2663 return -ENOENT;
2664
2665 font->width = f->width;
2666 font->height = f->height;
2667 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2668 }
2669
2670 static u16 palette_red[16];
2671 static u16 palette_green[16];
2672 static u16 palette_blue[16];
2673
2674 static struct fb_cmap palette_cmap = {
2675 0, 16, palette_red, palette_green, palette_blue, NULL
2676 };
2677
2678 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2679 {
2680 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2681 int i, j, k, depth;
2682 u8 val;
2683
2684 if (fbcon_is_inactive(vc, info))
2685 return -EINVAL;
2686
2687 if (!CON_IS_VISIBLE(vc))
2688 return 0;
2689
2690 depth = fb_get_color_depth(&info->var, &info->fix);
2691 if (depth > 3) {
2692 for (i = j = 0; i < 16; i++) {
2693 k = table[i];
2694 val = vc->vc_palette[j++];
2695 palette_red[k] = (val << 8) | val;
2696 val = vc->vc_palette[j++];
2697 palette_green[k] = (val << 8) | val;
2698 val = vc->vc_palette[j++];
2699 palette_blue[k] = (val << 8) | val;
2700 }
2701 palette_cmap.len = 16;
2702 palette_cmap.start = 0;
2703 /*
2704 * If framebuffer is capable of less than 16 colors,
2705 * use default palette of fbcon.
2706 */
2707 } else
2708 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2709
2710 return fb_set_cmap(&palette_cmap, info);
2711 }
2712
2713 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2714 {
2715 unsigned long p;
2716 int line;
2717
2718 if (vc->vc_num != fg_console || !softback_lines)
2719 return (u16 *) (vc->vc_origin + offset);
2720 line = offset / vc->vc_size_row;
2721 if (line >= softback_lines)
2722 return (u16 *) (vc->vc_origin + offset -
2723 softback_lines * vc->vc_size_row);
2724 p = softback_curr + offset;
2725 if (p >= softback_end)
2726 p += softback_buf - softback_end;
2727 return (u16 *) p;
2728 }
2729
2730 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2731 int *px, int *py)
2732 {
2733 unsigned long ret;
2734 int x, y;
2735
2736 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2737 unsigned long offset = (pos - vc->vc_origin) / 2;
2738
2739 x = offset % vc->vc_cols;
2740 y = offset / vc->vc_cols;
2741 if (vc->vc_num == fg_console)
2742 y += softback_lines;
2743 ret = pos + (vc->vc_cols - x) * 2;
2744 } else if (vc->vc_num == fg_console && softback_lines) {
2745 unsigned long offset = pos - softback_curr;
2746
2747 if (pos < softback_curr)
2748 offset += softback_end - softback_buf;
2749 offset /= 2;
2750 x = offset % vc->vc_cols;
2751 y = offset / vc->vc_cols;
2752 ret = pos + (vc->vc_cols - x) * 2;
2753 if (ret == softback_end)
2754 ret = softback_buf;
2755 if (ret == softback_in)
2756 ret = vc->vc_origin;
2757 } else {
2758 /* Should not happen */
2759 x = y = 0;
2760 ret = vc->vc_origin;
2761 }
2762 if (px)
2763 *px = x;
2764 if (py)
2765 *py = y;
2766 return ret;
2767 }
2768
2769 /* As we might be inside of softback, we may work with non-contiguous buffer,
2770 that's why we have to use a separate routine. */
2771 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2772 {
2773 while (cnt--) {
2774 u16 a = scr_readw(p);
2775 if (!vc->vc_can_do_color)
2776 a ^= 0x0800;
2777 else if (vc->vc_hi_font_mask == 0x100)
2778 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2779 (((a) & 0x0e00) << 4);
2780 else
2781 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2782 (((a) & 0x0700) << 4);
2783 scr_writew(a, p++);
2784 if (p == (u16 *) softback_end)
2785 p = (u16 *) softback_buf;
2786 if (p == (u16 *) softback_in)
2787 p = (u16 *) vc->vc_origin;
2788 }
2789 }
2790
2791 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2792 {
2793 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2794 struct fbcon_ops *ops = info->fbcon_par;
2795 struct display *disp = &fb_display[fg_console];
2796 int offset, limit, scrollback_old;
2797
2798 if (softback_top) {
2799 if (vc->vc_num != fg_console)
2800 return 0;
2801 if (vc->vc_mode != KD_TEXT || !lines)
2802 return 0;
2803 if (logo_shown >= 0) {
2804 struct vc_data *conp2 = vc_cons[logo_shown].d;
2805
2806 if (conp2->vc_top == logo_lines
2807 && conp2->vc_bottom == conp2->vc_rows)
2808 conp2->vc_top = 0;
2809 if (logo_shown == vc->vc_num) {
2810 unsigned long p, q;
2811 int i;
2812
2813 p = softback_in;
2814 q = vc->vc_origin +
2815 logo_lines * vc->vc_size_row;
2816 for (i = 0; i < logo_lines; i++) {
2817 if (p == softback_top)
2818 break;
2819 if (p == softback_buf)
2820 p = softback_end;
2821 p -= vc->vc_size_row;
2822 q -= vc->vc_size_row;
2823 scr_memcpyw((u16 *) q, (u16 *) p,
2824 vc->vc_size_row);
2825 }
2826 softback_in = softback_curr = p;
2827 update_region(vc, vc->vc_origin,
2828 logo_lines * vc->vc_cols);
2829 }
2830 logo_shown = FBCON_LOGO_CANSHOW;
2831 }
2832 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2833 fbcon_redraw_softback(vc, disp, lines);
2834 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2835 return 0;
2836 }
2837
2838 if (!scrollback_phys_max)
2839 return -ENOSYS;
2840
2841 scrollback_old = scrollback_current;
2842 scrollback_current -= lines;
2843 if (scrollback_current < 0)
2844 scrollback_current = 0;
2845 else if (scrollback_current > scrollback_max)
2846 scrollback_current = scrollback_max;
2847 if (scrollback_current == scrollback_old)
2848 return 0;
2849
2850 if (fbcon_is_inactive(vc, info))
2851 return 0;
2852
2853 fbcon_cursor(vc, CM_ERASE);
2854
2855 offset = disp->yscroll - scrollback_current;
2856 limit = disp->vrows;
2857 switch (disp->scrollmode) {
2858 case SCROLL_WRAP_MOVE:
2859 info->var.vmode |= FB_VMODE_YWRAP;
2860 break;
2861 case SCROLL_PAN_MOVE:
2862 case SCROLL_PAN_REDRAW:
2863 limit -= vc->vc_rows;
2864 info->var.vmode &= ~FB_VMODE_YWRAP;
2865 break;
2866 }
2867 if (offset < 0)
2868 offset += limit;
2869 else if (offset >= limit)
2870 offset -= limit;
2871
2872 ops->var.xoffset = 0;
2873 ops->var.yoffset = offset * vc->vc_font.height;
2874 ops->update_start(info);
2875
2876 if (!scrollback_current)
2877 fbcon_cursor(vc, CM_DRAW);
2878 return 0;
2879 }
2880
2881 static int fbcon_set_origin(struct vc_data *vc)
2882 {
2883 if (softback_lines)
2884 fbcon_scrolldelta(vc, softback_lines);
2885 return 0;
2886 }
2887
2888 static void fbcon_suspended(struct fb_info *info)
2889 {
2890 struct vc_data *vc = NULL;
2891 struct fbcon_ops *ops = info->fbcon_par;
2892
2893 if (!ops || ops->currcon < 0)
2894 return;
2895 vc = vc_cons[ops->currcon].d;
2896
2897 /* Clear cursor, restore saved data */
2898 fbcon_cursor(vc, CM_ERASE);
2899 }
2900
2901 static void fbcon_resumed(struct fb_info *info)
2902 {
2903 struct vc_data *vc;
2904 struct fbcon_ops *ops = info->fbcon_par;
2905
2906 if (!ops || ops->currcon < 0)
2907 return;
2908 vc = vc_cons[ops->currcon].d;
2909
2910 update_screen(vc);
2911 }
2912
2913 static void fbcon_modechanged(struct fb_info *info)
2914 {
2915 struct fbcon_ops *ops = info->fbcon_par;
2916 struct vc_data *vc;
2917 struct display *p;
2918 int rows, cols;
2919
2920 if (!ops || ops->currcon < 0)
2921 return;
2922 vc = vc_cons[ops->currcon].d;
2923 if (vc->vc_mode != KD_TEXT ||
2924 registered_fb[con2fb_map[ops->currcon]] != info)
2925 return;
2926
2927 p = &fb_display[vc->vc_num];
2928 set_blitting_type(vc, info);
2929
2930 if (CON_IS_VISIBLE(vc)) {
2931 var_to_display(p, &info->var, info);
2932 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2933 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2934 cols /= vc->vc_font.width;
2935 rows /= vc->vc_font.height;
2936 vc_resize(vc, cols, rows);
2937 updatescrollmode(p, info, vc);
2938 scrollback_max = 0;
2939 scrollback_current = 0;
2940
2941 if (!fbcon_is_inactive(vc, info)) {
2942 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2943 ops->update_start(info);
2944 }
2945
2946 fbcon_set_palette(vc, color_table);
2947 update_screen(vc);
2948 if (softback_buf)
2949 fbcon_update_softback(vc);
2950 }
2951 }
2952
2953 static void fbcon_set_all_vcs(struct fb_info *info)
2954 {
2955 struct fbcon_ops *ops = info->fbcon_par;
2956 struct vc_data *vc;
2957 struct display *p;
2958 int i, rows, cols, fg = -1;
2959
2960 if (!ops || ops->currcon < 0)
2961 return;
2962
2963 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2964 vc = vc_cons[i].d;
2965 if (!vc || vc->vc_mode != KD_TEXT ||
2966 registered_fb[con2fb_map[i]] != info)
2967 continue;
2968
2969 if (CON_IS_VISIBLE(vc)) {
2970 fg = i;
2971 continue;
2972 }
2973
2974 p = &fb_display[vc->vc_num];
2975 set_blitting_type(vc, info);
2976 var_to_display(p, &info->var, info);
2977 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2978 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2979 cols /= vc->vc_font.width;
2980 rows /= vc->vc_font.height;
2981 vc_resize(vc, cols, rows);
2982 }
2983
2984 if (fg != -1)
2985 fbcon_modechanged(info);
2986 }
2987
2988 static int fbcon_mode_deleted(struct fb_info *info,
2989 struct fb_videomode *mode)
2990 {
2991 struct fb_info *fb_info;
2992 struct display *p;
2993 int i, j, found = 0;
2994
2995 /* before deletion, ensure that mode is not in use */
2996 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997 j = con2fb_map[i];
2998 if (j == -1)
2999 continue;
3000 fb_info = registered_fb[j];
3001 if (fb_info != info)
3002 continue;
3003 p = &fb_display[i];
3004 if (!p || !p->mode)
3005 continue;
3006 if (fb_mode_is_equal(p->mode, mode)) {
3007 found = 1;
3008 break;
3009 }
3010 }
3011 return found;
3012 }
3013
3014 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3015 static int fbcon_unbind(void)
3016 {
3017 int ret;
3018
3019 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3020 fbcon_is_default);
3021 return ret;
3022 }
3023 #else
3024 static inline int fbcon_unbind(void)
3025 {
3026 return -EINVAL;
3027 }
3028 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3029
3030 static int fbcon_fb_unbind(int idx)
3031 {
3032 int i, new_idx = -1, ret = 0;
3033
3034 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3035 if (con2fb_map[i] != idx &&
3036 con2fb_map[i] != -1) {
3037 new_idx = i;
3038 break;
3039 }
3040 }
3041
3042 if (new_idx != -1) {
3043 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3044 if (con2fb_map[i] == idx)
3045 set_con2fb_map(i, new_idx, 0);
3046 }
3047 } else
3048 ret = fbcon_unbind();
3049
3050 return ret;
3051 }
3052
3053 static int fbcon_fb_unregistered(struct fb_info *info)
3054 {
3055 int i, idx = info->node;
3056
3057 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3058 if (con2fb_map[i] == idx)
3059 con2fb_map[i] = -1;
3060 }
3061
3062 if (idx == info_idx) {
3063 info_idx = -1;
3064
3065 for (i = 0; i < FB_MAX; i++) {
3066 if (registered_fb[i] != NULL) {
3067 info_idx = i;
3068 break;
3069 }
3070 }
3071 }
3072
3073 if (info_idx != -1) {
3074 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3075 if (con2fb_map[i] == -1)
3076 con2fb_map[i] = info_idx;
3077 }
3078 }
3079
3080 if (!num_registered_fb)
3081 unregister_con_driver(&fb_con);
3082
3083
3084 if (primary_device == idx)
3085 primary_device = -1;
3086
3087 return 0;
3088 }
3089
3090 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3091 static void fbcon_select_primary(struct fb_info *info)
3092 {
3093 if (!map_override && primary_device == -1 &&
3094 fb_is_primary_device(info)) {
3095 int i;
3096
3097 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3098 info->fix.id, info->node);
3099 primary_device = info->node;
3100
3101 for (i = first_fb_vc; i <= last_fb_vc; i++)
3102 con2fb_map_boot[i] = primary_device;
3103
3104 if (con_is_bound(&fb_con)) {
3105 printk(KERN_INFO "fbcon: Remapping primary device, "
3106 "fb%i, to tty %i-%i\n", info->node,
3107 first_fb_vc + 1, last_fb_vc + 1);
3108 info_idx = primary_device;
3109 }
3110 }
3111
3112 }
3113 #else
3114 static inline void fbcon_select_primary(struct fb_info *info)
3115 {
3116 return;
3117 }
3118 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3119
3120 static int fbcon_fb_registered(struct fb_info *info)
3121 {
3122 int ret = 0, i, idx = info->node;
3123
3124 fbcon_select_primary(info);
3125
3126 if (info_idx == -1) {
3127 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3128 if (con2fb_map_boot[i] == idx) {
3129 info_idx = idx;
3130 break;
3131 }
3132 }
3133
3134 if (info_idx != -1)
3135 ret = fbcon_takeover(1);
3136 } else {
3137 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3138 if (con2fb_map_boot[i] == idx)
3139 set_con2fb_map(i, idx, 0);
3140 }
3141 }
3142
3143 return ret;
3144 }
3145
3146 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3147 {
3148 struct fbcon_ops *ops = info->fbcon_par;
3149 struct vc_data *vc;
3150
3151 if (!ops || ops->currcon < 0)
3152 return;
3153
3154 vc = vc_cons[ops->currcon].d;
3155 if (vc->vc_mode != KD_TEXT ||
3156 registered_fb[con2fb_map[ops->currcon]] != info)
3157 return;
3158
3159 if (CON_IS_VISIBLE(vc)) {
3160 if (blank)
3161 do_blank_screen(0);
3162 else
3163 do_unblank_screen(0);
3164 }
3165 ops->blank_state = blank;
3166 }
3167
3168 static void fbcon_new_modelist(struct fb_info *info)
3169 {
3170 int i;
3171 struct vc_data *vc;
3172 struct fb_var_screeninfo var;
3173 const struct fb_videomode *mode;
3174
3175 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3176 if (registered_fb[con2fb_map[i]] != info)
3177 continue;
3178 if (!fb_display[i].mode)
3179 continue;
3180 vc = vc_cons[i].d;
3181 display_to_var(&var, &fb_display[i]);
3182 mode = fb_find_nearest_mode(fb_display[i].mode,
3183 &info->modelist);
3184 fb_videomode_to_var(&var, mode);
3185 fbcon_set_disp(info, &var, vc->vc_num);
3186 }
3187 }
3188
3189 static void fbcon_get_requirement(struct fb_info *info,
3190 struct fb_blit_caps *caps)
3191 {
3192 struct vc_data *vc;
3193 struct display *p;
3194
3195 if (caps->flags) {
3196 int i, charcnt;
3197
3198 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3199 vc = vc_cons[i].d;
3200 if (vc && vc->vc_mode == KD_TEXT &&
3201 info->node == con2fb_map[i]) {
3202 p = &fb_display[i];
3203 caps->x |= 1 << (vc->vc_font.width - 1);
3204 caps->y |= 1 << (vc->vc_font.height - 1);
3205 charcnt = (p->userfont) ?
3206 FNTCHARCNT(p->fontdata) : 256;
3207 if (caps->len < charcnt)
3208 caps->len = charcnt;
3209 }
3210 }
3211 } else {
3212 vc = vc_cons[fg_console].d;
3213
3214 if (vc && vc->vc_mode == KD_TEXT &&
3215 info->node == con2fb_map[fg_console]) {
3216 p = &fb_display[fg_console];
3217 caps->x = 1 << (vc->vc_font.width - 1);
3218 caps->y = 1 << (vc->vc_font.height - 1);
3219 caps->len = (p->userfont) ?
3220 FNTCHARCNT(p->fontdata) : 256;
3221 }
3222 }
3223 }
3224
3225 static int fbcon_event_notify(struct notifier_block *self,
3226 unsigned long action, void *data)
3227 {
3228 struct fb_event *event = data;
3229 struct fb_info *info = event->info;
3230 struct fb_videomode *mode;
3231 struct fb_con2fbmap *con2fb;
3232 struct fb_blit_caps *caps;
3233 int ret = 0;
3234
3235 /*
3236 * ignore all events except driver registration and deregistration
3237 * if fbcon is not active
3238 */
3239 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3240 action == FB_EVENT_FB_UNREGISTERED))
3241 goto done;
3242
3243 switch(action) {
3244 case FB_EVENT_SUSPEND:
3245 fbcon_suspended(info);
3246 break;
3247 case FB_EVENT_RESUME:
3248 fbcon_resumed(info);
3249 break;
3250 case FB_EVENT_MODE_CHANGE:
3251 fbcon_modechanged(info);
3252 break;
3253 case FB_EVENT_MODE_CHANGE_ALL:
3254 fbcon_set_all_vcs(info);
3255 break;
3256 case FB_EVENT_MODE_DELETE:
3257 mode = event->data;
3258 ret = fbcon_mode_deleted(info, mode);
3259 break;
3260 case FB_EVENT_FB_UNBIND:
3261 ret = fbcon_fb_unbind(info->node);
3262 break;
3263 case FB_EVENT_FB_REGISTERED:
3264 ret = fbcon_fb_registered(info);
3265 break;
3266 case FB_EVENT_FB_UNREGISTERED:
3267 ret = fbcon_fb_unregistered(info);
3268 break;
3269 case FB_EVENT_SET_CONSOLE_MAP:
3270 con2fb = event->data;
3271 ret = set_con2fb_map(con2fb->console - 1,
3272 con2fb->framebuffer, 1);
3273 break;
3274 case FB_EVENT_GET_CONSOLE_MAP:
3275 con2fb = event->data;
3276 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3277 break;
3278 case FB_EVENT_BLANK:
3279 fbcon_fb_blanked(info, *(int *)event->data);
3280 break;
3281 case FB_EVENT_NEW_MODELIST:
3282 fbcon_new_modelist(info);
3283 break;
3284 case FB_EVENT_GET_REQ:
3285 caps = event->data;
3286 fbcon_get_requirement(info, caps);
3287 break;
3288 }
3289
3290 done:
3291 return ret;
3292 }
3293
3294 /*
3295 * The console `switch' structure for the frame buffer based console
3296 */
3297
3298 static const struct consw fb_con = {
3299 .owner = THIS_MODULE,
3300 .con_startup = fbcon_startup,
3301 .con_init = fbcon_init,
3302 .con_deinit = fbcon_deinit,
3303 .con_clear = fbcon_clear,
3304 .con_putc = fbcon_putc,
3305 .con_putcs = fbcon_putcs,
3306 .con_cursor = fbcon_cursor,
3307 .con_scroll = fbcon_scroll,
3308 .con_bmove = fbcon_bmove,
3309 .con_switch = fbcon_switch,
3310 .con_blank = fbcon_blank,
3311 .con_font_set = fbcon_set_font,
3312 .con_font_get = fbcon_get_font,
3313 .con_font_default = fbcon_set_def_font,
3314 .con_font_copy = fbcon_copy_font,
3315 .con_set_palette = fbcon_set_palette,
3316 .con_scrolldelta = fbcon_scrolldelta,
3317 .con_set_origin = fbcon_set_origin,
3318 .con_invert_region = fbcon_invert_region,
3319 .con_screen_pos = fbcon_screen_pos,
3320 .con_getxy = fbcon_getxy,
3321 .con_resize = fbcon_resize,
3322 };
3323
3324 static struct notifier_block fbcon_event_notifier = {
3325 .notifier_call = fbcon_event_notify,
3326 };
3327
3328 static ssize_t store_rotate(struct device *device,
3329 struct device_attribute *attr, const char *buf,
3330 size_t count)
3331 {
3332 struct fb_info *info;
3333 int rotate, idx;
3334 char **last = NULL;
3335
3336 if (fbcon_has_exited)
3337 return count;
3338
3339 acquire_console_sem();
3340 idx = con2fb_map[fg_console];
3341
3342 if (idx == -1 || registered_fb[idx] == NULL)
3343 goto err;
3344
3345 info = registered_fb[idx];
3346 rotate = simple_strtoul(buf, last, 0);
3347 fbcon_rotate(info, rotate);
3348 err:
3349 release_console_sem();
3350 return count;
3351 }
3352
3353 static ssize_t store_rotate_all(struct device *device,
3354 struct device_attribute *attr,const char *buf,
3355 size_t count)
3356 {
3357 struct fb_info *info;
3358 int rotate, idx;
3359 char **last = NULL;
3360
3361 if (fbcon_has_exited)
3362 return count;
3363
3364 acquire_console_sem();
3365 idx = con2fb_map[fg_console];
3366
3367 if (idx == -1 || registered_fb[idx] == NULL)
3368 goto err;
3369
3370 info = registered_fb[idx];
3371 rotate = simple_strtoul(buf, last, 0);
3372 fbcon_rotate_all(info, rotate);
3373 err:
3374 release_console_sem();
3375 return count;
3376 }
3377
3378 static ssize_t show_rotate(struct device *device,
3379 struct device_attribute *attr,char *buf)
3380 {
3381 struct fb_info *info;
3382 int rotate = 0, idx;
3383
3384 if (fbcon_has_exited)
3385 return 0;
3386
3387 acquire_console_sem();
3388 idx = con2fb_map[fg_console];
3389
3390 if (idx == -1 || registered_fb[idx] == NULL)
3391 goto err;
3392
3393 info = registered_fb[idx];
3394 rotate = fbcon_get_rotate(info);
3395 err:
3396 release_console_sem();
3397 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3398 }
3399
3400 static ssize_t show_cursor_blink(struct device *device,
3401 struct device_attribute *attr, char *buf)
3402 {
3403 struct fb_info *info;
3404 struct fbcon_ops *ops;
3405 int idx, blink = -1;
3406
3407 if (fbcon_has_exited)
3408 return 0;
3409
3410 acquire_console_sem();
3411 idx = con2fb_map[fg_console];
3412
3413 if (idx == -1 || registered_fb[idx] == NULL)
3414 goto err;
3415
3416 info = registered_fb[idx];
3417 ops = info->fbcon_par;
3418
3419 if (!ops)
3420 goto err;
3421
3422 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3423 err:
3424 release_console_sem();
3425 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3426 }
3427
3428 static ssize_t store_cursor_blink(struct device *device,
3429 struct device_attribute *attr,
3430 const char *buf, size_t count)
3431 {
3432 struct fb_info *info;
3433 int blink, idx;
3434 char **last = NULL;
3435
3436 if (fbcon_has_exited)
3437 return count;
3438
3439 acquire_console_sem();
3440 idx = con2fb_map[fg_console];
3441
3442 if (idx == -1 || registered_fb[idx] == NULL)
3443 goto err;
3444
3445 info = registered_fb[idx];
3446
3447 if (!info->fbcon_par)
3448 goto err;
3449
3450 blink = simple_strtoul(buf, last, 0);
3451
3452 if (blink) {
3453 fbcon_cursor_noblink = 0;
3454 fbcon_add_cursor_timer(info);
3455 } else {
3456 fbcon_cursor_noblink = 1;
3457 fbcon_del_cursor_timer(info);
3458 }
3459
3460 err:
3461 release_console_sem();
3462 return count;
3463 }
3464
3465 static struct device_attribute device_attrs[] = {
3466 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3467 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3468 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3469 store_cursor_blink),
3470 };
3471
3472 static int fbcon_init_device(void)
3473 {
3474 int i, error = 0;
3475
3476 fbcon_has_sysfs = 1;
3477
3478 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3479 error = device_create_file(fbcon_device, &device_attrs[i]);
3480
3481 if (error)
3482 break;
3483 }
3484
3485 if (error) {
3486 while (--i >= 0)
3487 device_remove_file(fbcon_device, &device_attrs[i]);
3488
3489 fbcon_has_sysfs = 0;
3490 }
3491
3492 return 0;
3493 }
3494
3495 static void fbcon_start(void)
3496 {
3497 if (num_registered_fb) {
3498 int i;
3499
3500 acquire_console_sem();
3501
3502 for (i = 0; i < FB_MAX; i++) {
3503 if (registered_fb[i] != NULL) {
3504 info_idx = i;
3505 break;
3506 }
3507 }
3508
3509 release_console_sem();
3510 fbcon_takeover(0);
3511 }
3512 }
3513
3514 static void fbcon_exit(void)
3515 {
3516 struct fb_info *info;
3517 int i, j, mapped;
3518
3519 if (fbcon_has_exited)
3520 return;
3521
3522 #ifdef CONFIG_ATARI
3523 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3524 #endif
3525 #ifdef CONFIG_MAC
3526 if (MACH_IS_MAC && vbl_detected)
3527 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3528 #endif
3529
3530 kfree((void *)softback_buf);
3531 softback_buf = 0UL;
3532
3533 for (i = 0; i < FB_MAX; i++) {
3534 int pending;
3535
3536 mapped = 0;
3537 info = registered_fb[i];
3538
3539 if (info == NULL)
3540 continue;
3541
3542 pending = cancel_work_sync(&info->queue);
3543 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3544 "no"));
3545
3546 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3547 if (con2fb_map[j] == i)
3548 mapped = 1;
3549 }
3550
3551 if (mapped) {
3552 if (info->fbops->fb_release)
3553 info->fbops->fb_release(info, 0);
3554 module_put(info->fbops->owner);
3555
3556 if (info->fbcon_par) {
3557 struct fbcon_ops *ops = info->fbcon_par;
3558
3559 fbcon_del_cursor_timer(info);
3560 kfree(ops->cursor_src);
3561 kfree(info->fbcon_par);
3562 info->fbcon_par = NULL;
3563 }
3564
3565 if (info->queue.func == fb_flashcursor)
3566 info->queue.func = NULL;
3567 }
3568 }
3569
3570 fbcon_has_exited = 1;
3571 }
3572
3573 static int __init fb_console_init(void)
3574 {
3575 int i;
3576
3577 acquire_console_sem();
3578 fb_register_client(&fbcon_event_notifier);
3579 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3580 "fbcon");
3581
3582 if (IS_ERR(fbcon_device)) {
3583 printk(KERN_WARNING "Unable to create device "
3584 "for fbcon; errno = %ld\n",
3585 PTR_ERR(fbcon_device));
3586 fbcon_device = NULL;
3587 } else
3588 fbcon_init_device();
3589
3590 for (i = 0; i < MAX_NR_CONSOLES; i++)
3591 con2fb_map[i] = -1;
3592
3593 release_console_sem();
3594 fbcon_start();
3595 return 0;
3596 }
3597
3598 module_init(fb_console_init);
3599
3600 #ifdef MODULE
3601
3602 static void __exit fbcon_deinit_device(void)
3603 {
3604 int i;
3605
3606 if (fbcon_has_sysfs) {
3607 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3608 device_remove_file(fbcon_device, &device_attrs[i]);
3609
3610 fbcon_has_sysfs = 0;
3611 }
3612 }
3613
3614 static void __exit fb_console_exit(void)
3615 {
3616 acquire_console_sem();
3617 fb_unregister_client(&fbcon_event_notifier);
3618 fbcon_deinit_device();
3619 device_destroy(fb_class, MKDEV(0, 0));
3620 fbcon_exit();
3621 release_console_sem();
3622 unregister_con_driver(&fb_con);
3623 }
3624
3625 module_exit(fb_console_exit);
3626
3627 #endif
3628
3629 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.17506 seconds and 5 git commands to generate.