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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / video / console / fbcon.c
blob022282494d3fecee136f47d831e2dd4e534fe62d
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, __FUNCTION__ , ## args)
96 #else
97 # define DPRINTK(fmt, args...)
98 #endif
99
100 enum {
101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
104 };
105
106 static struct display fb_display[MAX_NR_CONSOLES];
107
108 static signed char con2fb_map[MAX_NR_CONSOLES];
109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
110 #ifndef MODULE
111 static int logo_height;
112 #endif
113 static int logo_lines;
114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116 static int logo_shown = FBCON_LOGO_CANSHOW;
117 /* Software scrollback */
118 static int fbcon_softback_size = 32768;
119 static unsigned long softback_buf, softback_curr;
120 static unsigned long softback_in;
121 static unsigned long softback_top, softback_end;
122 static int softback_lines;
123 /* console mappings */
124 static int first_fb_vc;
125 static int last_fb_vc = MAX_NR_CONSOLES - 1;
126 static int fbcon_is_default = 1;
127 static int fbcon_has_exited;
128 static int primary_device = -1;
129
130 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
131 static int map_override;
132
133 static inline void fbcon_map_override(void)
134 {
135 map_override = 1;
136 }
137 #else
138 static inline void fbcon_map_override(void)
139 {
140 }
141 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
142
143 /* font data */
144 static char fontname[40];
145
146 /* current fb_info */
147 static int info_idx = -1;
148
149 /* console rotation */
150 static int initial_rotation;
151 static int fbcon_has_sysfs;
152
153 static const struct consw fb_con;
154
155 #define CM_SOFTBACK (8)
156
157 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
158
159 static int fbcon_set_origin(struct vc_data *);
160
161 #define CURSOR_DRAW_DELAY (1)
162
163 /* # VBL ints between cursor state changes */
164 #define ATARI_CURSOR_BLINK_RATE (42)
165 #define MAC_CURSOR_BLINK_RATE (32)
166 #define DEFAULT_CURSOR_BLINK_RATE (20)
167
168 static int vbl_cursor_cnt;
169 static int fbcon_cursor_noblink;
170
171 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
172
173 /*
174 * Interface used by the world
175 */
176
177 static const char *fbcon_startup(void);
178 static void fbcon_init(struct vc_data *vc, int init);
179 static void fbcon_deinit(struct vc_data *vc);
180 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
181 int width);
182 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
183 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
184 int count, int ypos, int xpos);
185 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
186 static void fbcon_cursor(struct vc_data *vc, int mode);
187 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
188 int count);
189 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
190 int height, int width);
191 static int fbcon_switch(struct vc_data *vc);
192 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
193 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
194 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
195
196 /*
197 * Internal routines
198 */
199 static __inline__ void ywrap_up(struct vc_data *vc, int count);
200 static __inline__ void ywrap_down(struct vc_data *vc, int count);
201 static __inline__ void ypan_up(struct vc_data *vc, int count);
202 static __inline__ void ypan_down(struct vc_data *vc, int count);
203 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
204 int dy, int dx, int height, int width, u_int y_break);
205 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
206 int unit);
207 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
208 int line, int count, int dy);
209 static void fbcon_modechanged(struct fb_info *info);
210 static void fbcon_set_all_vcs(struct fb_info *info);
211 static void fbcon_start(void);
212 static void fbcon_exit(void);
213 static struct device *fbcon_device;
214
215 #ifdef CONFIG_MAC
216 /*
217 * On the Macintoy, there may or may not be a working VBL int. We need to probe
218 */
219 static int vbl_detected;
220
221 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
222 {
223 vbl_detected++;
224 return IRQ_HANDLED;
225 }
226 #endif
227
228 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
229 static inline void fbcon_set_rotation(struct fb_info *info)
230 {
231 struct fbcon_ops *ops = info->fbcon_par;
232
233 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
234 ops->p->con_rotate < 4)
235 ops->rotate = ops->p->con_rotate;
236 else
237 ops->rotate = 0;
238 }
239
240 static void fbcon_rotate(struct fb_info *info, u32 rotate)
241 {
242 struct fbcon_ops *ops= info->fbcon_par;
243 struct fb_info *fb_info;
244
245 if (!ops || ops->currcon == -1)
246 return;
247
248 fb_info = registered_fb[con2fb_map[ops->currcon]];
249
250 if (info == fb_info) {
251 struct display *p = &fb_display[ops->currcon];
252
253 if (rotate < 4)
254 p->con_rotate = rotate;
255 else
256 p->con_rotate = 0;
257
258 fbcon_modechanged(info);
259 }
260 }
261
262 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
263 {
264 struct fbcon_ops *ops = info->fbcon_par;
265 struct vc_data *vc;
266 struct display *p;
267 int i;
268
269 if (!ops || ops->currcon < 0 || rotate > 3)
270 return;
271
272 for (i = first_fb_vc; i <= last_fb_vc; i++) {
273 vc = vc_cons[i].d;
274 if (!vc || vc->vc_mode != KD_TEXT ||
275 registered_fb[con2fb_map[i]] != info)
276 continue;
277
278 p = &fb_display[vc->vc_num];
279 p->con_rotate = rotate;
280 }
281
282 fbcon_set_all_vcs(info);
283 }
284 #else
285 static inline void fbcon_set_rotation(struct fb_info *info)
286 {
287 struct fbcon_ops *ops = info->fbcon_par;
288
289 ops->rotate = FB_ROTATE_UR;
290 }
291
292 static void fbcon_rotate(struct fb_info *info, u32 rotate)
293 {
294 return;
295 }
296
297 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
298 {
299 return;
300 }
301 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
302
303 static int fbcon_get_rotate(struct fb_info *info)
304 {
305 struct fbcon_ops *ops = info->fbcon_par;
306
307 return (ops) ? ops->rotate : 0;
308 }
309
310 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
311 {
312 struct fbcon_ops *ops = info->fbcon_par;
313
314 return (info->state != FBINFO_STATE_RUNNING ||
315 vc->vc_mode != KD_TEXT || ops->graphics);
316 }
317
318 static inline int get_color(struct vc_data *vc, struct fb_info *info,
319 u16 c, int is_fg)
320 {
321 int depth = fb_get_color_depth(&info->var, &info->fix);
322 int color = 0;
323
324 if (console_blanked) {
325 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
326
327 c = vc->vc_video_erase_char & charmask;
328 }
329
330 if (depth != 1)
331 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
332 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
333
334 switch (depth) {
335 case 1:
336 {
337 int col = mono_col(info);
338 /* 0 or 1 */
339 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
340 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
341
342 if (console_blanked)
343 fg = bg;
344
345 color = (is_fg) ? fg : bg;
346 break;
347 }
348 case 2:
349 /*
350 * Scale down 16-colors to 4 colors. Default 4-color palette
351 * is grayscale. However, simply dividing the values by 4
352 * will not work, as colors 1, 2 and 3 will be scaled-down
353 * to zero rendering them invisible. So empirically convert
354 * colors to a sane 4-level grayscale.
355 */
356 switch (color) {
357 case 0:
358 color = 0; /* black */
359 break;
360 case 1 ... 6:
361 color = 2; /* white */
362 break;
363 case 7 ... 8:
364 color = 1; /* gray */
365 break;
366 default:
367 color = 3; /* intense white */
368 break;
369 }
370 break;
371 case 3:
372 /*
373 * Last 8 entries of default 16-color palette is a more intense
374 * version of the first 8 (i.e., same chrominance, different
375 * luminance).
376 */
377 color &= 7;
378 break;
379 }
380
381
382 return color;
383 }
384
385 static void fbcon_update_softback(struct vc_data *vc)
386 {
387 int l = fbcon_softback_size / vc->vc_size_row;
388
389 if (l > 5)
390 softback_end = softback_buf + l * vc->vc_size_row;
391 else
392 /* Smaller scrollback makes no sense, and 0 would screw
393 the operation totally */
394 softback_top = 0;
395 }
396
397 static void fb_flashcursor(struct work_struct *work)
398 {
399 struct fb_info *info = container_of(work, struct fb_info, queue);
400 struct fbcon_ops *ops = info->fbcon_par;
401 struct display *p;
402 struct vc_data *vc = NULL;
403 int c;
404 int mode;
405
406 acquire_console_sem();
407 if (ops && ops->currcon != -1)
408 vc = vc_cons[ops->currcon].d;
409
410 if (!vc || !CON_IS_VISIBLE(vc) ||
411 registered_fb[con2fb_map[vc->vc_num]] != info ||
412 vc->vc_deccm != 1) {
413 release_console_sem();
414 return;
415 }
416
417 p = &fb_display[vc->vc_num];
418 c = scr_readw((u16 *) vc->vc_pos);
419 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
420 CM_ERASE : CM_DRAW;
421 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
422 get_color(vc, info, c, 0));
423 release_console_sem();
424 }
425
426 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
427 static int cursor_blink_rate;
428 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
429 {
430 struct fb_info *info = dev_id;
431
432 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
433 schedule_work(&info->queue);
434 vbl_cursor_cnt = cursor_blink_rate;
435 }
436 return IRQ_HANDLED;
437 }
438 #endif
439
440 static void cursor_timer_handler(unsigned long dev_addr)
441 {
442 struct fb_info *info = (struct fb_info *) dev_addr;
443 struct fbcon_ops *ops = info->fbcon_par;
444
445 schedule_work(&info->queue);
446 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
447 }
448
449 static void fbcon_add_cursor_timer(struct fb_info *info)
450 {
451 struct fbcon_ops *ops = info->fbcon_par;
452
453 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
454 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
455 !fbcon_cursor_noblink) {
456 if (!info->queue.func)
457 INIT_WORK(&info->queue, fb_flashcursor);
458
459 init_timer(&ops->cursor_timer);
460 ops->cursor_timer.function = cursor_timer_handler;
461 ops->cursor_timer.expires = jiffies + HZ / 5;
462 ops->cursor_timer.data = (unsigned long ) info;
463 add_timer(&ops->cursor_timer);
464 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
465 }
466 }
467
468 static void fbcon_del_cursor_timer(struct fb_info *info)
469 {
470 struct fbcon_ops *ops = info->fbcon_par;
471
472 if (info->queue.func == fb_flashcursor &&
473 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
474 del_timer_sync(&ops->cursor_timer);
475 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
476 }
477 }
478
479 #ifndef MODULE
480 static int __init fb_console_setup(char *this_opt)
481 {
482 char *options;
483 int i, j;
484
485 if (!this_opt || !*this_opt)
486 return 1;
487
488 while ((options = strsep(&this_opt, ",")) != NULL) {
489 if (!strncmp(options, "font:", 5))
490 strcpy(fontname, options + 5);
491
492 if (!strncmp(options, "scrollback:", 11)) {
493 options += 11;
494 if (*options) {
495 fbcon_softback_size = simple_strtoul(options, &options, 0);
496 if (*options == 'k' || *options == 'K') {
497 fbcon_softback_size *= 1024;
498 options++;
499 }
500 if (*options != ',')
501 return 1;
502 options++;
503 } else
504 return 1;
505 }
506
507 if (!strncmp(options, "map:", 4)) {
508 options += 4;
509 if (*options) {
510 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
511 if (!options[j])
512 j = 0;
513 con2fb_map_boot[i] =
514 (options[j++]-'0') % FB_MAX;
515 }
516
517 fbcon_map_override();
518 }
519
520 return 1;
521 }
522
523 if (!strncmp(options, "vc:", 3)) {
524 options += 3;
525 if (*options)
526 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
527 if (first_fb_vc < 0)
528 first_fb_vc = 0;
529 if (*options++ == '-')
530 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
531 fbcon_is_default = 0;
532 }
533
534 if (!strncmp(options, "rotate:", 7)) {
535 options += 7;
536 if (*options)
537 initial_rotation = simple_strtoul(options, &options, 0);
538 if (initial_rotation > 3)
539 initial_rotation = 0;
540 }
541 }
542 return 1;
543 }
544
545 __setup("fbcon=", fb_console_setup);
546 #endif
547
548 static int search_fb_in_map(int idx)
549 {
550 int i, retval = 0;
551
552 for (i = first_fb_vc; i <= last_fb_vc; i++) {
553 if (con2fb_map[i] == idx)
554 retval = 1;
555 }
556 return retval;
557 }
558
559 static int search_for_mapped_con(void)
560 {
561 int i, retval = 0;
562
563 for (i = first_fb_vc; i <= last_fb_vc; i++) {
564 if (con2fb_map[i] != -1)
565 retval = 1;
566 }
567 return retval;
568 }
569
570 static int fbcon_takeover(int show_logo)
571 {
572 int err, i;
573
574 if (!num_registered_fb)
575 return -ENODEV;
576
577 if (!show_logo)
578 logo_shown = FBCON_LOGO_DONTSHOW;
579
580 for (i = first_fb_vc; i <= last_fb_vc; i++)
581 con2fb_map[i] = info_idx;
582
583 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
584 fbcon_is_default);
585
586 if (err) {
587 for (i = first_fb_vc; i <= last_fb_vc; i++) {
588 con2fb_map[i] = -1;
589 }
590 info_idx = -1;
591 }
592
593 return err;
594 }
595
596 #ifdef MODULE
597 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
598 int cols, int rows, int new_cols, int new_rows)
599 {
600 logo_shown = FBCON_LOGO_DONTSHOW;
601 }
602 #else
603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
604 int cols, int rows, int new_cols, int new_rows)
605 {
606 /* Need to make room for the logo */
607 struct fbcon_ops *ops = info->fbcon_par;
608 int cnt, erase = vc->vc_video_erase_char, step;
609 unsigned short *save = NULL, *r, *q;
610
611 if (info->flags & FBINFO_MODULE) {
612 logo_shown = FBCON_LOGO_DONTSHOW;
613 return;
614 }
615
616 /*
617 * remove underline attribute from erase character
618 * if black and white framebuffer.
619 */
620 if (fb_get_color_depth(&info->var, &info->fix) == 1)
621 erase &= ~0x400;
622 logo_height = fb_prepare_logo(info, ops->rotate);
623 logo_lines = (logo_height + vc->vc_font.height - 1) /
624 vc->vc_font.height;
625 q = (unsigned short *) (vc->vc_origin +
626 vc->vc_size_row * rows);
627 step = logo_lines * cols;
628 for (r = q - logo_lines * cols; r < q; r++)
629 if (scr_readw(r) != vc->vc_video_erase_char)
630 break;
631 if (r != q && new_rows >= rows + logo_lines) {
632 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
633 if (save) {
634 int i = cols < new_cols ? cols : new_cols;
635 scr_memsetw(save, erase, logo_lines * new_cols * 2);
636 r = q - step;
637 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
638 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
639 r = q;
640 }
641 }
642 if (r == q) {
643 /* We can scroll screen down */
644 r = q - step - cols;
645 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
646 scr_memcpyw(r + step, r, vc->vc_size_row);
647 r -= cols;
648 }
649 if (!save) {
650 int lines;
651 if (vc->vc_y + logo_lines >= rows)
652 lines = rows - vc->vc_y - 1;
653 else
654 lines = logo_lines;
655 vc->vc_y += lines;
656 vc->vc_pos += lines * vc->vc_size_row;
657 }
658 }
659 scr_memsetw((unsigned short *) vc->vc_origin,
660 erase,
661 vc->vc_size_row * logo_lines);
662
663 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
664 fbcon_clear_margins(vc, 0);
665 update_screen(vc);
666 }
667
668 if (save) {
669 q = (unsigned short *) (vc->vc_origin +
670 vc->vc_size_row *
671 rows);
672 scr_memcpyw(q, save, logo_lines * new_cols * 2);
673 vc->vc_y += logo_lines;
674 vc->vc_pos += logo_lines * vc->vc_size_row;
675 kfree(save);
676 }
677
678 if (logo_lines > vc->vc_bottom) {
679 logo_shown = FBCON_LOGO_CANSHOW;
680 printk(KERN_INFO
681 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
682 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
683 logo_shown = FBCON_LOGO_DRAW;
684 vc->vc_top = logo_lines;
685 }
686 }
687 #endif /* MODULE */
688
689 #ifdef CONFIG_FB_TILEBLITTING
690 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
691 {
692 struct fbcon_ops *ops = info->fbcon_par;
693
694 ops->p = &fb_display[vc->vc_num];
695
696 if ((info->flags & FBINFO_MISC_TILEBLITTING))
697 fbcon_set_tileops(vc, info);
698 else {
699 fbcon_set_rotation(info);
700 fbcon_set_bitops(ops);
701 }
702 }
703
704 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
705 {
706 int err = 0;
707
708 if (info->flags & FBINFO_MISC_TILEBLITTING &&
709 info->tileops->fb_get_tilemax(info) < charcount)
710 err = 1;
711
712 return err;
713 }
714 #else
715 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
716 {
717 struct fbcon_ops *ops = info->fbcon_par;
718
719 info->flags &= ~FBINFO_MISC_TILEBLITTING;
720 ops->p = &fb_display[vc->vc_num];
721 fbcon_set_rotation(info);
722 fbcon_set_bitops(ops);
723 }
724
725 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
726 {
727 return 0;
728 }
729
730 #endif /* CONFIG_MISC_TILEBLITTING */
731
732
733 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
734 int unit, int oldidx)
735 {
736 struct fbcon_ops *ops = NULL;
737 int err = 0;
738
739 if (!try_module_get(info->fbops->owner))
740 err = -ENODEV;
741
742 if (!err && info->fbops->fb_open &&
743 info->fbops->fb_open(info, 0))
744 err = -ENODEV;
745
746 if (!err) {
747 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
748 if (!ops)
749 err = -ENOMEM;
750 }
751
752 if (!err) {
753 info->fbcon_par = ops;
754
755 if (vc)
756 set_blitting_type(vc, info);
757 }
758
759 if (err) {
760 con2fb_map[unit] = oldidx;
761 module_put(info->fbops->owner);
762 }
763
764 return err;
765 }
766
767 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
768 struct fb_info *newinfo, int unit,
769 int oldidx, int found)
770 {
771 struct fbcon_ops *ops = oldinfo->fbcon_par;
772 int err = 0;
773
774 if (oldinfo->fbops->fb_release &&
775 oldinfo->fbops->fb_release(oldinfo, 0)) {
776 con2fb_map[unit] = oldidx;
777 if (!found && newinfo->fbops->fb_release)
778 newinfo->fbops->fb_release(newinfo, 0);
779 if (!found)
780 module_put(newinfo->fbops->owner);
781 err = -ENODEV;
782 }
783
784 if (!err) {
785 fbcon_del_cursor_timer(oldinfo);
786 kfree(ops->cursor_state.mask);
787 kfree(ops->cursor_data);
788 kfree(ops->fontbuffer);
789 kfree(oldinfo->fbcon_par);
790 oldinfo->fbcon_par = NULL;
791 module_put(oldinfo->fbops->owner);
792 /*
793 If oldinfo and newinfo are driving the same hardware,
794 the fb_release() method of oldinfo may attempt to
795 restore the hardware state. This will leave the
796 newinfo in an undefined state. Thus, a call to
797 fb_set_par() may be needed for the newinfo.
798 */
799 if (newinfo->fbops->fb_set_par)
800 newinfo->fbops->fb_set_par(newinfo);
801 }
802
803 return err;
804 }
805
806 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
807 int unit, int show_logo)
808 {
809 struct fbcon_ops *ops = info->fbcon_par;
810
811 ops->currcon = fg_console;
812
813 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
814 info->fbops->fb_set_par(info);
815
816 ops->flags |= FBCON_FLAGS_INIT;
817 ops->graphics = 0;
818 fbcon_set_disp(info, &info->var, unit);
819
820 if (show_logo) {
821 struct vc_data *fg_vc = vc_cons[fg_console].d;
822 struct fb_info *fg_info =
823 registered_fb[con2fb_map[fg_console]];
824
825 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
826 fg_vc->vc_rows, fg_vc->vc_cols,
827 fg_vc->vc_rows);
828 }
829
830 update_screen(vc_cons[fg_console].d);
831 }
832
833 /**
834 * set_con2fb_map - map console to frame buffer device
835 * @unit: virtual console number to map
836 * @newidx: frame buffer index to map virtual console to
837 * @user: user request
838 *
839 * Maps a virtual console @unit to a frame buffer device
840 * @newidx.
841 */
842 static int set_con2fb_map(int unit, int newidx, int user)
843 {
844 struct vc_data *vc = vc_cons[unit].d;
845 int oldidx = con2fb_map[unit];
846 struct fb_info *info = registered_fb[newidx];
847 struct fb_info *oldinfo = NULL;
848 int found, err = 0;
849
850 if (oldidx == newidx)
851 return 0;
852
853 if (!info || fbcon_has_exited)
854 return -EINVAL;
855
856 if (!err && !search_for_mapped_con()) {
857 info_idx = newidx;
858 return fbcon_takeover(0);
859 }
860
861 if (oldidx != -1)
862 oldinfo = registered_fb[oldidx];
863
864 found = search_fb_in_map(newidx);
865
866 acquire_console_sem();
867 con2fb_map[unit] = newidx;
868 if (!err && !found)
869 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
870
871
872 /*
873 * If old fb is not mapped to any of the consoles,
874 * fbcon should release it.
875 */
876 if (!err && oldinfo && !search_fb_in_map(oldidx))
877 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
878 found);
879
880 if (!err) {
881 int show_logo = (fg_console == 0 && !user &&
882 logo_shown != FBCON_LOGO_DONTSHOW);
883
884 if (!found)
885 fbcon_add_cursor_timer(info);
886 con2fb_map_boot[unit] = newidx;
887 con2fb_init_display(vc, info, unit, show_logo);
888 }
889
890 if (!search_fb_in_map(info_idx))
891 info_idx = newidx;
892
893 release_console_sem();
894 return err;
895 }
896
897 /*
898 * Low Level Operations
899 */
900 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
901 static int var_to_display(struct display *disp,
902 struct fb_var_screeninfo *var,
903 struct fb_info *info)
904 {
905 disp->xres_virtual = var->xres_virtual;
906 disp->yres_virtual = var->yres_virtual;
907 disp->bits_per_pixel = var->bits_per_pixel;
908 disp->grayscale = var->grayscale;
909 disp->nonstd = var->nonstd;
910 disp->accel_flags = var->accel_flags;
911 disp->height = var->height;
912 disp->width = var->width;
913 disp->red = var->red;
914 disp->green = var->green;
915 disp->blue = var->blue;
916 disp->transp = var->transp;
917 disp->rotate = var->rotate;
918 disp->mode = fb_match_mode(var, &info->modelist);
919 if (disp->mode == NULL)
920 /* This should not happen */
921 return -EINVAL;
922 return 0;
923 }
924
925 static void display_to_var(struct fb_var_screeninfo *var,
926 struct display *disp)
927 {
928 fb_videomode_to_var(var, disp->mode);
929 var->xres_virtual = disp->xres_virtual;
930 var->yres_virtual = disp->yres_virtual;
931 var->bits_per_pixel = disp->bits_per_pixel;
932 var->grayscale = disp->grayscale;
933 var->nonstd = disp->nonstd;
934 var->accel_flags = disp->accel_flags;
935 var->height = disp->height;
936 var->width = disp->width;
937 var->red = disp->red;
938 var->green = disp->green;
939 var->blue = disp->blue;
940 var->transp = disp->transp;
941 var->rotate = disp->rotate;
942 }
943
944 static const char *fbcon_startup(void)
945 {
946 const char *display_desc = "frame buffer device";
947 struct display *p = &fb_display[fg_console];
948 struct vc_data *vc = vc_cons[fg_console].d;
949 const struct font_desc *font = NULL;
950 struct module *owner;
951 struct fb_info *info = NULL;
952 struct fbcon_ops *ops;
953 int rows, cols;
954 int irqres;
955
956 irqres = 1;
957 /*
958 * If num_registered_fb is zero, this is a call for the dummy part.
959 * The frame buffer devices weren't initialized yet.
960 */
961 if (!num_registered_fb || info_idx == -1)
962 return display_desc;
963 /*
964 * Instead of blindly using registered_fb[0], we use info_idx, set by
965 * fb_console_init();
966 */
967 info = registered_fb[info_idx];
968 if (!info)
969 return NULL;
970
971 owner = info->fbops->owner;
972 if (!try_module_get(owner))
973 return NULL;
974 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
975 module_put(owner);
976 return NULL;
977 }
978
979 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
980 if (!ops) {
981 module_put(owner);
982 return NULL;
983 }
984
985 ops->currcon = -1;
986 ops->graphics = 1;
987 ops->cur_rotate = -1;
988 info->fbcon_par = ops;
989 p->con_rotate = initial_rotation;
990 set_blitting_type(vc, info);
991
992 if (info->fix.type != FB_TYPE_TEXT) {
993 if (fbcon_softback_size) {
994 if (!softback_buf) {
995 softback_buf =
996 (unsigned long)
997 kmalloc(fbcon_softback_size,
998 GFP_KERNEL);
999 if (!softback_buf) {
1000 fbcon_softback_size = 0;
1001 softback_top = 0;
1002 }
1003 }
1004 } else {
1005 if (softback_buf) {
1006 kfree((void *) softback_buf);
1007 softback_buf = 0;
1008 softback_top = 0;
1009 }
1010 }
1011 if (softback_buf)
1012 softback_in = softback_top = softback_curr =
1013 softback_buf;
1014 softback_lines = 0;
1015 }
1016
1017 /* Setup default font */
1018 if (!p->fontdata) {
1019 if (!fontname[0] || !(font = find_font(fontname)))
1020 font = get_default_font(info->var.xres,
1021 info->var.yres,
1022 info->pixmap.blit_x,
1023 info->pixmap.blit_y);
1024 vc->vc_font.width = font->width;
1025 vc->vc_font.height = font->height;
1026 vc->vc_font.data = (void *)(p->fontdata = font->data);
1027 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1028 }
1029
1030 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1031 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1032 cols /= vc->vc_font.width;
1033 rows /= vc->vc_font.height;
1034 vc_resize(vc, cols, rows);
1035
1036 DPRINTK("mode: %s\n", info->fix.id);
1037 DPRINTK("visual: %d\n", info->fix.visual);
1038 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1039 info->var.yres,
1040 info->var.bits_per_pixel);
1041
1042 #ifdef CONFIG_ATARI
1043 if (MACH_IS_ATARI) {
1044 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1045 irqres =
1046 request_irq(IRQ_AUTO_4, fb_vbl_handler,
1047 IRQ_TYPE_PRIO, "framebuffer vbl",
1048 info);
1049 }
1050 #endif /* CONFIG_ATARI */
1051
1052 #ifdef CONFIG_MAC
1053 /*
1054 * On a Macintoy, the VBL interrupt may or may not be active.
1055 * As interrupt based cursor is more reliable and race free, we
1056 * probe for VBL interrupts.
1057 */
1058 if (MACH_IS_MAC) {
1059 int ct = 0;
1060 /*
1061 * Probe for VBL: set temp. handler ...
1062 */
1063 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1064 "framebuffer vbl", info);
1065 vbl_detected = 0;
1066
1067 /*
1068 * ... and spin for 20 ms ...
1069 */
1070 while (!vbl_detected && ++ct < 1000)
1071 udelay(20);
1072
1073 if (ct == 1000)
1074 printk
1075 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1076
1077 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1078
1079 if (vbl_detected) {
1080 /*
1081 * interrupt based cursor ok
1082 */
1083 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1084 irqres =
1085 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1086 "framebuffer vbl", info);
1087 } else {
1088 /*
1089 * VBL not detected: fall through, use timer based cursor
1090 */
1091 irqres = 1;
1092 }
1093 }
1094 #endif /* CONFIG_MAC */
1095
1096 fbcon_add_cursor_timer(info);
1097 fbcon_has_exited = 0;
1098 return display_desc;
1099 }
1100
1101 static void fbcon_init(struct vc_data *vc, int init)
1102 {
1103 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1104 struct fbcon_ops *ops;
1105 struct vc_data **default_mode = vc->vc_display_fg;
1106 struct vc_data *svc = *default_mode;
1107 struct display *t, *p = &fb_display[vc->vc_num];
1108 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1109 int cap;
1110
1111 if (info_idx == -1 || info == NULL)
1112 return;
1113
1114 cap = info->flags;
1115
1116 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1117 (info->fix.type == FB_TYPE_TEXT))
1118 logo = 0;
1119
1120 if (var_to_display(p, &info->var, info))
1121 return;
1122
1123 if (!info->fbcon_par)
1124 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1125
1126 /* If we are not the first console on this
1127 fb, copy the font from that console */
1128 t = &fb_display[fg_console];
1129 if (!p->fontdata) {
1130 if (t->fontdata) {
1131 struct vc_data *fvc = vc_cons[fg_console].d;
1132
1133 vc->vc_font.data = (void *)(p->fontdata =
1134 fvc->vc_font.data);
1135 vc->vc_font.width = fvc->vc_font.width;
1136 vc->vc_font.height = fvc->vc_font.height;
1137 p->userfont = t->userfont;
1138
1139 if (p->userfont)
1140 REFCOUNT(p->fontdata)++;
1141 } else {
1142 const struct font_desc *font = NULL;
1143
1144 if (!fontname[0] || !(font = find_font(fontname)))
1145 font = get_default_font(info->var.xres,
1146 info->var.yres,
1147 info->pixmap.blit_x,
1148 info->pixmap.blit_y);
1149 vc->vc_font.width = font->width;
1150 vc->vc_font.height = font->height;
1151 vc->vc_font.data = (void *)(p->fontdata = font->data);
1152 vc->vc_font.charcount = 256; /* FIXME Need to
1153 support more fonts */
1154 }
1155 }
1156
1157 if (p->userfont)
1158 charcnt = FNTCHARCNT(p->fontdata);
1159
1160 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1161 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1162 if (charcnt == 256) {
1163 vc->vc_hi_font_mask = 0;
1164 } else {
1165 vc->vc_hi_font_mask = 0x100;
1166 if (vc->vc_can_do_color)
1167 vc->vc_complement_mask <<= 1;
1168 }
1169
1170 if (!*svc->vc_uni_pagedir_loc)
1171 con_set_default_unimap(svc);
1172 if (!*vc->vc_uni_pagedir_loc)
1173 con_copy_unimap(vc, svc);
1174
1175 ops = info->fbcon_par;
1176 p->con_rotate = initial_rotation;
1177 set_blitting_type(vc, info);
1178
1179 cols = vc->vc_cols;
1180 rows = vc->vc_rows;
1181 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1182 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1183 new_cols /= vc->vc_font.width;
1184 new_rows /= vc->vc_font.height;
1185 vc_resize(vc, new_cols, new_rows);
1186
1187 /*
1188 * We must always set the mode. The mode of the previous console
1189 * driver could be in the same resolution but we are using different
1190 * hardware so we have to initialize the hardware.
1191 *
1192 * We need to do it in fbcon_init() to prevent screen corruption.
1193 */
1194 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1195 if (info->fbops->fb_set_par &&
1196 !(ops->flags & FBCON_FLAGS_INIT))
1197 info->fbops->fb_set_par(info);
1198 ops->flags |= FBCON_FLAGS_INIT;
1199 }
1200
1201 ops->graphics = 0;
1202
1203 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1204 !(cap & FBINFO_HWACCEL_DISABLED))
1205 p->scrollmode = SCROLL_MOVE;
1206 else /* default to something safe */
1207 p->scrollmode = SCROLL_REDRAW;
1208
1209 /*
1210 * ++guenther: console.c:vc_allocate() relies on initializing
1211 * vc_{cols,rows}, but we must not set those if we are only
1212 * resizing the console.
1213 */
1214 if (!init) {
1215 vc->vc_cols = new_cols;
1216 vc->vc_rows = new_rows;
1217 }
1218
1219 if (logo)
1220 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1221
1222 if (vc == svc && softback_buf)
1223 fbcon_update_softback(vc);
1224
1225 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1226 ops->rotate = FB_ROTATE_UR;
1227 set_blitting_type(vc, info);
1228 }
1229
1230 ops->p = &fb_display[fg_console];
1231 }
1232
1233 static void fbcon_free_font(struct display *p)
1234 {
1235 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1236 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1237 p->fontdata = NULL;
1238 p->userfont = 0;
1239 }
1240
1241 static void fbcon_deinit(struct vc_data *vc)
1242 {
1243 struct display *p = &fb_display[vc->vc_num];
1244 struct fb_info *info;
1245 struct fbcon_ops *ops;
1246 int idx;
1247
1248 fbcon_free_font(p);
1249 idx = con2fb_map[vc->vc_num];
1250
1251 if (idx == -1)
1252 goto finished;
1253
1254 info = registered_fb[idx];
1255
1256 if (!info)
1257 goto finished;
1258
1259 ops = info->fbcon_par;
1260
1261 if (!ops)
1262 goto finished;
1263
1264 if (CON_IS_VISIBLE(vc))
1265 fbcon_del_cursor_timer(info);
1266
1267 ops->flags &= ~FBCON_FLAGS_INIT;
1268 finished:
1269
1270 if (!con_is_bound(&fb_con))
1271 fbcon_exit();
1272
1273 return;
1274 }
1275
1276 /* ====================================================================== */
1277
1278 /* fbcon_XXX routines - interface used by the world
1279 *
1280 * This system is now divided into two levels because of complications
1281 * caused by hardware scrolling. Top level functions:
1282 *
1283 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1284 *
1285 * handles y values in range [0, scr_height-1] that correspond to real
1286 * screen positions. y_wrap shift means that first line of bitmap may be
1287 * anywhere on this display. These functions convert lineoffsets to
1288 * bitmap offsets and deal with the wrap-around case by splitting blits.
1289 *
1290 * fbcon_bmove_physical_8() -- These functions fast implementations
1291 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1292 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1293 *
1294 * WARNING:
1295 *
1296 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1297 * Implies should only really hardware scroll in rows. Only reason for
1298 * restriction is simplicity & efficiency at the moment.
1299 */
1300
1301 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1302 int width)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1306
1307 struct display *p = &fb_display[vc->vc_num];
1308 u_int y_break;
1309
1310 if (fbcon_is_inactive(vc, info))
1311 return;
1312
1313 if (!height || !width)
1314 return;
1315
1316 /* Split blits that cross physical y_wrap boundary */
1317
1318 y_break = p->vrows - p->yscroll;
1319 if (sy < y_break && sy + height - 1 >= y_break) {
1320 u_int b = y_break - sy;
1321 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1322 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1323 width);
1324 } else
1325 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1326 }
1327
1328 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1329 int count, int ypos, int xpos)
1330 {
1331 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1332 struct display *p = &fb_display[vc->vc_num];
1333 struct fbcon_ops *ops = info->fbcon_par;
1334
1335 if (!fbcon_is_inactive(vc, info))
1336 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1337 get_color(vc, info, scr_readw(s), 1),
1338 get_color(vc, info, scr_readw(s), 0));
1339 }
1340
1341 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1342 {
1343 unsigned short chr;
1344
1345 scr_writew(c, &chr);
1346 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1347 }
1348
1349 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1350 {
1351 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1352 struct fbcon_ops *ops = info->fbcon_par;
1353
1354 if (!fbcon_is_inactive(vc, info))
1355 ops->clear_margins(vc, info, bottom_only);
1356 }
1357
1358 static void fbcon_cursor(struct vc_data *vc, int mode)
1359 {
1360 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1361 struct fbcon_ops *ops = info->fbcon_par;
1362 int y;
1363 int c = scr_readw((u16 *) vc->vc_pos);
1364
1365 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1366 return;
1367
1368 if (vc->vc_cursor_type & 0x10)
1369 fbcon_del_cursor_timer(info);
1370 else
1371 fbcon_add_cursor_timer(info);
1372
1373 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1374 if (mode & CM_SOFTBACK) {
1375 mode &= ~CM_SOFTBACK;
1376 y = softback_lines;
1377 } else {
1378 if (softback_lines)
1379 fbcon_set_origin(vc);
1380 y = 0;
1381 }
1382
1383 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1384 get_color(vc, info, c, 0));
1385 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1386 }
1387
1388 static int scrollback_phys_max = 0;
1389 static int scrollback_max = 0;
1390 static int scrollback_current = 0;
1391
1392 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1393 int unit)
1394 {
1395 struct display *p, *t;
1396 struct vc_data **default_mode, *vc;
1397 struct vc_data *svc;
1398 struct fbcon_ops *ops = info->fbcon_par;
1399 int rows, cols, charcnt = 256;
1400
1401 p = &fb_display[unit];
1402
1403 if (var_to_display(p, var, info))
1404 return;
1405
1406 vc = vc_cons[unit].d;
1407
1408 if (!vc)
1409 return;
1410
1411 default_mode = vc->vc_display_fg;
1412 svc = *default_mode;
1413 t = &fb_display[svc->vc_num];
1414
1415 if (!vc->vc_font.data) {
1416 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1417 vc->vc_font.width = (*default_mode)->vc_font.width;
1418 vc->vc_font.height = (*default_mode)->vc_font.height;
1419 p->userfont = t->userfont;
1420 if (p->userfont)
1421 REFCOUNT(p->fontdata)++;
1422 }
1423 if (p->userfont)
1424 charcnt = FNTCHARCNT(p->fontdata);
1425
1426 var->activate = FB_ACTIVATE_NOW;
1427 info->var.activate = var->activate;
1428 var->yoffset = info->var.yoffset;
1429 var->xoffset = info->var.xoffset;
1430 fb_set_var(info, var);
1431 ops->var = info->var;
1432 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1433 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1434 if (charcnt == 256) {
1435 vc->vc_hi_font_mask = 0;
1436 } else {
1437 vc->vc_hi_font_mask = 0x100;
1438 if (vc->vc_can_do_color)
1439 vc->vc_complement_mask <<= 1;
1440 }
1441
1442 if (!*svc->vc_uni_pagedir_loc)
1443 con_set_default_unimap(svc);
1444 if (!*vc->vc_uni_pagedir_loc)
1445 con_copy_unimap(vc, svc);
1446
1447 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1448 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1449 cols /= vc->vc_font.width;
1450 rows /= vc->vc_font.height;
1451 vc_resize(vc, cols, rows);
1452
1453 if (CON_IS_VISIBLE(vc)) {
1454 update_screen(vc);
1455 if (softback_buf)
1456 fbcon_update_softback(vc);
1457 }
1458 }
1459
1460 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1461 {
1462 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1463 struct fbcon_ops *ops = info->fbcon_par;
1464 struct display *p = &fb_display[vc->vc_num];
1465
1466 p->yscroll += count;
1467 if (p->yscroll >= p->vrows) /* Deal with wrap */
1468 p->yscroll -= p->vrows;
1469 ops->var.xoffset = 0;
1470 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1471 ops->var.vmode |= FB_VMODE_YWRAP;
1472 ops->update_start(info);
1473 scrollback_max += count;
1474 if (scrollback_max > scrollback_phys_max)
1475 scrollback_max = scrollback_phys_max;
1476 scrollback_current = 0;
1477 }
1478
1479 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1480 {
1481 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1482 struct fbcon_ops *ops = info->fbcon_par;
1483 struct display *p = &fb_display[vc->vc_num];
1484
1485 p->yscroll -= count;
1486 if (p->yscroll < 0) /* Deal with wrap */
1487 p->yscroll += p->vrows;
1488 ops->var.xoffset = 0;
1489 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1490 ops->var.vmode |= FB_VMODE_YWRAP;
1491 ops->update_start(info);
1492 scrollback_max -= count;
1493 if (scrollback_max < 0)
1494 scrollback_max = 0;
1495 scrollback_current = 0;
1496 }
1497
1498 static __inline__ void ypan_up(struct vc_data *vc, int count)
1499 {
1500 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1501 struct display *p = &fb_display[vc->vc_num];
1502 struct fbcon_ops *ops = info->fbcon_par;
1503
1504 p->yscroll += count;
1505 if (p->yscroll > p->vrows - vc->vc_rows) {
1506 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1507 0, 0, 0, vc->vc_rows, vc->vc_cols);
1508 p->yscroll -= p->vrows - vc->vc_rows;
1509 }
1510
1511 ops->var.xoffset = 0;
1512 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1513 ops->var.vmode &= ~FB_VMODE_YWRAP;
1514 ops->update_start(info);
1515 fbcon_clear_margins(vc, 1);
1516 scrollback_max += count;
1517 if (scrollback_max > scrollback_phys_max)
1518 scrollback_max = scrollback_phys_max;
1519 scrollback_current = 0;
1520 }
1521
1522 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1523 {
1524 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1525 struct fbcon_ops *ops = info->fbcon_par;
1526 struct display *p = &fb_display[vc->vc_num];
1527
1528 p->yscroll += count;
1529
1530 if (p->yscroll > p->vrows - vc->vc_rows) {
1531 p->yscroll -= p->vrows - vc->vc_rows;
1532 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1533 }
1534
1535 ops->var.xoffset = 0;
1536 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1537 ops->var.vmode &= ~FB_VMODE_YWRAP;
1538 ops->update_start(info);
1539 fbcon_clear_margins(vc, 1);
1540 scrollback_max += count;
1541 if (scrollback_max > scrollback_phys_max)
1542 scrollback_max = scrollback_phys_max;
1543 scrollback_current = 0;
1544 }
1545
1546 static __inline__ void ypan_down(struct vc_data *vc, int count)
1547 {
1548 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1549 struct display *p = &fb_display[vc->vc_num];
1550 struct fbcon_ops *ops = info->fbcon_par;
1551
1552 p->yscroll -= count;
1553 if (p->yscroll < 0) {
1554 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1555 0, vc->vc_rows, vc->vc_cols);
1556 p->yscroll += p->vrows - vc->vc_rows;
1557 }
1558
1559 ops->var.xoffset = 0;
1560 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1561 ops->var.vmode &= ~FB_VMODE_YWRAP;
1562 ops->update_start(info);
1563 fbcon_clear_margins(vc, 1);
1564 scrollback_max -= count;
1565 if (scrollback_max < 0)
1566 scrollback_max = 0;
1567 scrollback_current = 0;
1568 }
1569
1570 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1571 {
1572 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1573 struct fbcon_ops *ops = info->fbcon_par;
1574 struct display *p = &fb_display[vc->vc_num];
1575
1576 p->yscroll -= count;
1577
1578 if (p->yscroll < 0) {
1579 p->yscroll += p->vrows - vc->vc_rows;
1580 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1581 }
1582
1583 ops->var.xoffset = 0;
1584 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1585 ops->var.vmode &= ~FB_VMODE_YWRAP;
1586 ops->update_start(info);
1587 fbcon_clear_margins(vc, 1);
1588 scrollback_max -= count;
1589 if (scrollback_max < 0)
1590 scrollback_max = 0;
1591 scrollback_current = 0;
1592 }
1593
1594 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1595 long delta)
1596 {
1597 int count = vc->vc_rows;
1598 unsigned short *d, *s;
1599 unsigned long n;
1600 int line = 0;
1601
1602 d = (u16 *) softback_curr;
1603 if (d == (u16 *) softback_in)
1604 d = (u16 *) vc->vc_origin;
1605 n = softback_curr + delta * vc->vc_size_row;
1606 softback_lines -= delta;
1607 if (delta < 0) {
1608 if (softback_curr < softback_top && n < softback_buf) {
1609 n += softback_end - softback_buf;
1610 if (n < softback_top) {
1611 softback_lines -=
1612 (softback_top - n) / vc->vc_size_row;
1613 n = softback_top;
1614 }
1615 } else if (softback_curr >= softback_top
1616 && n < softback_top) {
1617 softback_lines -=
1618 (softback_top - n) / vc->vc_size_row;
1619 n = softback_top;
1620 }
1621 } else {
1622 if (softback_curr > softback_in && n >= softback_end) {
1623 n += softback_buf - softback_end;
1624 if (n > softback_in) {
1625 n = softback_in;
1626 softback_lines = 0;
1627 }
1628 } else if (softback_curr <= softback_in && n > softback_in) {
1629 n = softback_in;
1630 softback_lines = 0;
1631 }
1632 }
1633 if (n == softback_curr)
1634 return;
1635 softback_curr = n;
1636 s = (u16 *) softback_curr;
1637 if (s == (u16 *) softback_in)
1638 s = (u16 *) vc->vc_origin;
1639 while (count--) {
1640 unsigned short *start;
1641 unsigned short *le;
1642 unsigned short c;
1643 int x = 0;
1644 unsigned short attr = 1;
1645
1646 start = s;
1647 le = advance_row(s, 1);
1648 do {
1649 c = scr_readw(s);
1650 if (attr != (c & 0xff00)) {
1651 attr = c & 0xff00;
1652 if (s > start) {
1653 fbcon_putcs(vc, start, s - start,
1654 line, x);
1655 x += s - start;
1656 start = s;
1657 }
1658 }
1659 if (c == scr_readw(d)) {
1660 if (s > start) {
1661 fbcon_putcs(vc, start, s - start,
1662 line, x);
1663 x += s - start + 1;
1664 start = s + 1;
1665 } else {
1666 x++;
1667 start++;
1668 }
1669 }
1670 s++;
1671 d++;
1672 } while (s < le);
1673 if (s > start)
1674 fbcon_putcs(vc, start, s - start, line, x);
1675 line++;
1676 if (d == (u16 *) softback_end)
1677 d = (u16 *) softback_buf;
1678 if (d == (u16 *) softback_in)
1679 d = (u16 *) vc->vc_origin;
1680 if (s == (u16 *) softback_end)
1681 s = (u16 *) softback_buf;
1682 if (s == (u16 *) softback_in)
1683 s = (u16 *) vc->vc_origin;
1684 }
1685 }
1686
1687 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1688 int line, int count, int dy)
1689 {
1690 unsigned short *s = (unsigned short *)
1691 (vc->vc_origin + vc->vc_size_row * line);
1692
1693 while (count--) {
1694 unsigned short *start = s;
1695 unsigned short *le = advance_row(s, 1);
1696 unsigned short c;
1697 int x = 0;
1698 unsigned short attr = 1;
1699
1700 do {
1701 c = scr_readw(s);
1702 if (attr != (c & 0xff00)) {
1703 attr = c & 0xff00;
1704 if (s > start) {
1705 fbcon_putcs(vc, start, s - start,
1706 dy, x);
1707 x += s - start;
1708 start = s;
1709 }
1710 }
1711 console_conditional_schedule();
1712 s++;
1713 } while (s < le);
1714 if (s > start)
1715 fbcon_putcs(vc, start, s - start, dy, x);
1716 console_conditional_schedule();
1717 dy++;
1718 }
1719 }
1720
1721 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1722 struct display *p, int line, int count, int ycount)
1723 {
1724 int offset = ycount * vc->vc_cols;
1725 unsigned short *d = (unsigned short *)
1726 (vc->vc_origin + vc->vc_size_row * line);
1727 unsigned short *s = d + offset;
1728 struct fbcon_ops *ops = info->fbcon_par;
1729
1730 while (count--) {
1731 unsigned short *start = s;
1732 unsigned short *le = advance_row(s, 1);
1733 unsigned short c;
1734 int x = 0;
1735
1736 do {
1737 c = scr_readw(s);
1738
1739 if (c == scr_readw(d)) {
1740 if (s > start) {
1741 ops->bmove(vc, info, line + ycount, x,
1742 line, x, 1, s-start);
1743 x += s - start + 1;
1744 start = s + 1;
1745 } else {
1746 x++;
1747 start++;
1748 }
1749 }
1750
1751 scr_writew(c, d);
1752 console_conditional_schedule();
1753 s++;
1754 d++;
1755 } while (s < le);
1756 if (s > start)
1757 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1758 s-start);
1759 console_conditional_schedule();
1760 if (ycount > 0)
1761 line++;
1762 else {
1763 line--;
1764 /* NOTE: We subtract two lines from these pointers */
1765 s -= vc->vc_size_row;
1766 d -= vc->vc_size_row;
1767 }
1768 }
1769 }
1770
1771 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1772 int line, int count, int offset)
1773 {
1774 unsigned short *d = (unsigned short *)
1775 (vc->vc_origin + vc->vc_size_row * line);
1776 unsigned short *s = d + offset;
1777
1778 while (count--) {
1779 unsigned short *start = s;
1780 unsigned short *le = advance_row(s, 1);
1781 unsigned short c;
1782 int x = 0;
1783 unsigned short attr = 1;
1784
1785 do {
1786 c = scr_readw(s);
1787 if (attr != (c & 0xff00)) {
1788 attr = c & 0xff00;
1789 if (s > start) {
1790 fbcon_putcs(vc, start, s - start,
1791 line, x);
1792 x += s - start;
1793 start = s;
1794 }
1795 }
1796 if (c == scr_readw(d)) {
1797 if (s > start) {
1798 fbcon_putcs(vc, start, s - start,
1799 line, x);
1800 x += s - start + 1;
1801 start = s + 1;
1802 } else {
1803 x++;
1804 start++;
1805 }
1806 }
1807 scr_writew(c, d);
1808 console_conditional_schedule();
1809 s++;
1810 d++;
1811 } while (s < le);
1812 if (s > start)
1813 fbcon_putcs(vc, start, s - start, line, x);
1814 console_conditional_schedule();
1815 if (offset > 0)
1816 line++;
1817 else {
1818 line--;
1819 /* NOTE: We subtract two lines from these pointers */
1820 s -= vc->vc_size_row;
1821 d -= vc->vc_size_row;
1822 }
1823 }
1824 }
1825
1826 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1827 int count)
1828 {
1829 unsigned short *p;
1830
1831 if (vc->vc_num != fg_console)
1832 return;
1833 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1834
1835 while (count) {
1836 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1837 count--;
1838 p = advance_row(p, 1);
1839 softback_in += vc->vc_size_row;
1840 if (softback_in == softback_end)
1841 softback_in = softback_buf;
1842 if (softback_in == softback_top) {
1843 softback_top += vc->vc_size_row;
1844 if (softback_top == softback_end)
1845 softback_top = softback_buf;
1846 }
1847 }
1848 softback_curr = softback_in;
1849 }
1850
1851 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1852 int count)
1853 {
1854 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1855 struct display *p = &fb_display[vc->vc_num];
1856 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1857
1858 if (fbcon_is_inactive(vc, info))
1859 return -EINVAL;
1860
1861 fbcon_cursor(vc, CM_ERASE);
1862
1863 /*
1864 * ++Geert: Only use ywrap/ypan if the console is in text mode
1865 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1866 * whole screen (prevents flicker).
1867 */
1868
1869 switch (dir) {
1870 case SM_UP:
1871 if (count > vc->vc_rows) /* Maximum realistic size */
1872 count = vc->vc_rows;
1873 if (softback_top)
1874 fbcon_softback_note(vc, t, count);
1875 if (logo_shown >= 0)
1876 goto redraw_up;
1877 switch (p->scrollmode) {
1878 case SCROLL_MOVE:
1879 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1880 count);
1881 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1882 scr_memsetw((unsigned short *) (vc->vc_origin +
1883 vc->vc_size_row *
1884 (b - count)),
1885 vc->vc_video_erase_char,
1886 vc->vc_size_row * count);
1887 return 1;
1888 break;
1889
1890 case SCROLL_WRAP_MOVE:
1891 if (b - t - count > 3 * vc->vc_rows >> 2) {
1892 if (t > 0)
1893 fbcon_bmove(vc, 0, 0, count, 0, t,
1894 vc->vc_cols);
1895 ywrap_up(vc, count);
1896 if (vc->vc_rows - b > 0)
1897 fbcon_bmove(vc, b - count, 0, b, 0,
1898 vc->vc_rows - b,
1899 vc->vc_cols);
1900 } else if (info->flags & FBINFO_READS_FAST)
1901 fbcon_bmove(vc, t + count, 0, t, 0,
1902 b - t - count, vc->vc_cols);
1903 else
1904 goto redraw_up;
1905 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1906 break;
1907
1908 case SCROLL_PAN_REDRAW:
1909 if ((p->yscroll + count <=
1910 2 * (p->vrows - vc->vc_rows))
1911 && ((!scroll_partial && (b - t == vc->vc_rows))
1912 || (scroll_partial
1913 && (b - t - count >
1914 3 * vc->vc_rows >> 2)))) {
1915 if (t > 0)
1916 fbcon_redraw_move(vc, p, 0, t, count);
1917 ypan_up_redraw(vc, t, count);
1918 if (vc->vc_rows - b > 0)
1919 fbcon_redraw_move(vc, p, b,
1920 vc->vc_rows - b, b);
1921 } else
1922 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1923 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1924 break;
1925
1926 case SCROLL_PAN_MOVE:
1927 if ((p->yscroll + count <=
1928 2 * (p->vrows - vc->vc_rows))
1929 && ((!scroll_partial && (b - t == vc->vc_rows))
1930 || (scroll_partial
1931 && (b - t - count >
1932 3 * vc->vc_rows >> 2)))) {
1933 if (t > 0)
1934 fbcon_bmove(vc, 0, 0, count, 0, t,
1935 vc->vc_cols);
1936 ypan_up(vc, count);
1937 if (vc->vc_rows - b > 0)
1938 fbcon_bmove(vc, b - count, 0, b, 0,
1939 vc->vc_rows - b,
1940 vc->vc_cols);
1941 } else if (info->flags & FBINFO_READS_FAST)
1942 fbcon_bmove(vc, t + count, 0, t, 0,
1943 b - t - count, vc->vc_cols);
1944 else
1945 goto redraw_up;
1946 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1947 break;
1948
1949 case SCROLL_REDRAW:
1950 redraw_up:
1951 fbcon_redraw(vc, p, t, b - t - count,
1952 count * vc->vc_cols);
1953 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1954 scr_memsetw((unsigned short *) (vc->vc_origin +
1955 vc->vc_size_row *
1956 (b - count)),
1957 vc->vc_video_erase_char,
1958 vc->vc_size_row * count);
1959 return 1;
1960 }
1961 break;
1962
1963 case SM_DOWN:
1964 if (count > vc->vc_rows) /* Maximum realistic size */
1965 count = vc->vc_rows;
1966 if (logo_shown >= 0)
1967 goto redraw_down;
1968 switch (p->scrollmode) {
1969 case SCROLL_MOVE:
1970 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1971 -count);
1972 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1973 scr_memsetw((unsigned short *) (vc->vc_origin +
1974 vc->vc_size_row *
1975 t),
1976 vc->vc_video_erase_char,
1977 vc->vc_size_row * count);
1978 return 1;
1979 break;
1980
1981 case SCROLL_WRAP_MOVE:
1982 if (b - t - count > 3 * vc->vc_rows >> 2) {
1983 if (vc->vc_rows - b > 0)
1984 fbcon_bmove(vc, b, 0, b - count, 0,
1985 vc->vc_rows - b,
1986 vc->vc_cols);
1987 ywrap_down(vc, count);
1988 if (t > 0)
1989 fbcon_bmove(vc, count, 0, 0, 0, t,
1990 vc->vc_cols);
1991 } else if (info->flags & FBINFO_READS_FAST)
1992 fbcon_bmove(vc, t, 0, t + count, 0,
1993 b - t - count, vc->vc_cols);
1994 else
1995 goto redraw_down;
1996 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1997 break;
1998
1999 case SCROLL_PAN_MOVE:
2000 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2001 && ((!scroll_partial && (b - t == vc->vc_rows))
2002 || (scroll_partial
2003 && (b - t - count >
2004 3 * vc->vc_rows >> 2)))) {
2005 if (vc->vc_rows - b > 0)
2006 fbcon_bmove(vc, b, 0, b - count, 0,
2007 vc->vc_rows - b,
2008 vc->vc_cols);
2009 ypan_down(vc, count);
2010 if (t > 0)
2011 fbcon_bmove(vc, count, 0, 0, 0, t,
2012 vc->vc_cols);
2013 } else if (info->flags & FBINFO_READS_FAST)
2014 fbcon_bmove(vc, t, 0, t + count, 0,
2015 b - t - count, vc->vc_cols);
2016 else
2017 goto redraw_down;
2018 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2019 break;
2020
2021 case SCROLL_PAN_REDRAW:
2022 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2023 && ((!scroll_partial && (b - t == vc->vc_rows))
2024 || (scroll_partial
2025 && (b - t - count >
2026 3 * vc->vc_rows >> 2)))) {
2027 if (vc->vc_rows - b > 0)
2028 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2029 b - count);
2030 ypan_down_redraw(vc, t, count);
2031 if (t > 0)
2032 fbcon_redraw_move(vc, p, count, t, 0);
2033 } else
2034 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2035 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2036 break;
2037
2038 case SCROLL_REDRAW:
2039 redraw_down:
2040 fbcon_redraw(vc, p, b - 1, b - t - count,
2041 -count * vc->vc_cols);
2042 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2043 scr_memsetw((unsigned short *) (vc->vc_origin +
2044 vc->vc_size_row *
2045 t),
2046 vc->vc_video_erase_char,
2047 vc->vc_size_row * count);
2048 return 1;
2049 }
2050 }
2051 return 0;
2052 }
2053
2054
2055 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2056 int height, int width)
2057 {
2058 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2059 struct display *p = &fb_display[vc->vc_num];
2060
2061 if (fbcon_is_inactive(vc, info))
2062 return;
2063
2064 if (!width || !height)
2065 return;
2066
2067 /* Split blits that cross physical y_wrap case.
2068 * Pathological case involves 4 blits, better to use recursive
2069 * code rather than unrolled case
2070 *
2071 * Recursive invocations don't need to erase the cursor over and
2072 * over again, so we use fbcon_bmove_rec()
2073 */
2074 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2075 p->vrows - p->yscroll);
2076 }
2077
2078 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2079 int dy, int dx, int height, int width, u_int y_break)
2080 {
2081 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2082 struct fbcon_ops *ops = info->fbcon_par;
2083 u_int b;
2084
2085 if (sy < y_break && sy + height > y_break) {
2086 b = y_break - sy;
2087 if (dy < sy) { /* Avoid trashing self */
2088 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2089 y_break);
2090 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2091 height - b, width, y_break);
2092 } else {
2093 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2094 height - b, width, y_break);
2095 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2096 y_break);
2097 }
2098 return;
2099 }
2100
2101 if (dy < y_break && dy + height > y_break) {
2102 b = y_break - dy;
2103 if (dy < sy) { /* Avoid trashing self */
2104 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2105 y_break);
2106 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2107 height - b, width, y_break);
2108 } else {
2109 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2110 height - b, width, y_break);
2111 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2112 y_break);
2113 }
2114 return;
2115 }
2116 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2117 height, width);
2118 }
2119
2120 static __inline__ void updatescrollmode(struct display *p,
2121 struct fb_info *info,
2122 struct vc_data *vc)
2123 {
2124 struct fbcon_ops *ops = info->fbcon_par;
2125 int fh = vc->vc_font.height;
2126 int cap = info->flags;
2127 u16 t = 0;
2128 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2129 info->fix.xpanstep);
2130 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2131 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2132 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2133 info->var.xres_virtual);
2134 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2135 divides(ypan, vc->vc_font.height) && vyres > yres;
2136 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2137 divides(ywrap, vc->vc_font.height) &&
2138 divides(vc->vc_font.height, vyres) &&
2139 divides(vc->vc_font.height, yres);
2140 int reading_fast = cap & FBINFO_READS_FAST;
2141 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2142 !(cap & FBINFO_HWACCEL_DISABLED);
2143 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2144 !(cap & FBINFO_HWACCEL_DISABLED);
2145
2146 p->vrows = vyres/fh;
2147 if (yres > (fh * (vc->vc_rows + 1)))
2148 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2149 if ((yres % fh) && (vyres % fh < yres % fh))
2150 p->vrows--;
2151
2152 if (good_wrap || good_pan) {
2153 if (reading_fast || fast_copyarea)
2154 p->scrollmode = good_wrap ?
2155 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2156 else
2157 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2158 SCROLL_PAN_REDRAW;
2159 } else {
2160 if (reading_fast || (fast_copyarea && !fast_imageblit))
2161 p->scrollmode = SCROLL_MOVE;
2162 else
2163 p->scrollmode = SCROLL_REDRAW;
2164 }
2165 }
2166
2167 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2168 unsigned int height, unsigned int user)
2169 {
2170 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2171 struct fbcon_ops *ops = info->fbcon_par;
2172 struct display *p = &fb_display[vc->vc_num];
2173 struct fb_var_screeninfo var = info->var;
2174 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2175
2176 virt_w = FBCON_SWAP(ops->rotate, width, height);
2177 virt_h = FBCON_SWAP(ops->rotate, height, width);
2178 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2179 vc->vc_font.height);
2180 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2181 vc->vc_font.width);
2182 var.xres = virt_w * virt_fw;
2183 var.yres = virt_h * virt_fh;
2184 x_diff = info->var.xres - var.xres;
2185 y_diff = info->var.yres - var.yres;
2186 if (x_diff < 0 || x_diff > virt_fw ||
2187 y_diff < 0 || y_diff > virt_fh) {
2188 const struct fb_videomode *mode;
2189
2190 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2191 mode = fb_find_best_mode(&var, &info->modelist);
2192 if (mode == NULL)
2193 return -EINVAL;
2194 display_to_var(&var, p);
2195 fb_videomode_to_var(&var, mode);
2196
2197 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2198 return -EINVAL;
2199
2200 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2201 if (CON_IS_VISIBLE(vc)) {
2202 var.activate = FB_ACTIVATE_NOW |
2203 FB_ACTIVATE_FORCE;
2204 fb_set_var(info, &var);
2205 }
2206 var_to_display(p, &info->var, info);
2207 ops->var = info->var;
2208 }
2209 updatescrollmode(p, info, vc);
2210 return 0;
2211 }
2212
2213 static int fbcon_switch(struct vc_data *vc)
2214 {
2215 struct fb_info *info, *old_info = NULL;
2216 struct fbcon_ops *ops;
2217 struct display *p = &fb_display[vc->vc_num];
2218 struct fb_var_screeninfo var;
2219 int i, prev_console, charcnt = 256;
2220
2221 info = registered_fb[con2fb_map[vc->vc_num]];
2222 ops = info->fbcon_par;
2223
2224 if (softback_top) {
2225 if (softback_lines)
2226 fbcon_set_origin(vc);
2227 softback_top = softback_curr = softback_in = softback_buf;
2228 softback_lines = 0;
2229 fbcon_update_softback(vc);
2230 }
2231
2232 if (logo_shown >= 0) {
2233 struct vc_data *conp2 = vc_cons[logo_shown].d;
2234
2235 if (conp2->vc_top == logo_lines
2236 && conp2->vc_bottom == conp2->vc_rows)
2237 conp2->vc_top = 0;
2238 logo_shown = FBCON_LOGO_CANSHOW;
2239 }
2240
2241 prev_console = ops->currcon;
2242 if (prev_console != -1)
2243 old_info = registered_fb[con2fb_map[prev_console]];
2244 /*
2245 * FIXME: If we have multiple fbdev's loaded, we need to
2246 * update all info->currcon. Perhaps, we can place this
2247 * in a centralized structure, but this might break some
2248 * drivers.
2249 *
2250 * info->currcon = vc->vc_num;
2251 */
2252 for (i = 0; i < FB_MAX; i++) {
2253 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2254 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2255
2256 o->currcon = vc->vc_num;
2257 }
2258 }
2259 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2260 display_to_var(&var, p);
2261 var.activate = FB_ACTIVATE_NOW;
2262
2263 /*
2264 * make sure we don't unnecessarily trip the memcmp()
2265 * in fb_set_var()
2266 */
2267 info->var.activate = var.activate;
2268 var.yoffset = info->var.yoffset;
2269 var.xoffset = info->var.xoffset;
2270 var.vmode = info->var.vmode;
2271 fb_set_var(info, &var);
2272 ops->var = info->var;
2273
2274 if (old_info != NULL && (old_info != info ||
2275 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2276 if (info->fbops->fb_set_par)
2277 info->fbops->fb_set_par(info);
2278
2279 if (old_info != info)
2280 fbcon_del_cursor_timer(old_info);
2281 }
2282
2283 if (fbcon_is_inactive(vc, info) ||
2284 ops->blank_state != FB_BLANK_UNBLANK)
2285 fbcon_del_cursor_timer(info);
2286 else
2287 fbcon_add_cursor_timer(info);
2288
2289 set_blitting_type(vc, info);
2290 ops->cursor_reset = 1;
2291
2292 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2293 ops->rotate = FB_ROTATE_UR;
2294 set_blitting_type(vc, info);
2295 }
2296
2297 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2298 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2299
2300 if (p->userfont)
2301 charcnt = FNTCHARCNT(vc->vc_font.data);
2302
2303 if (charcnt > 256)
2304 vc->vc_complement_mask <<= 1;
2305
2306 updatescrollmode(p, info, vc);
2307
2308 switch (p->scrollmode) {
2309 case SCROLL_WRAP_MOVE:
2310 scrollback_phys_max = p->vrows - vc->vc_rows;
2311 break;
2312 case SCROLL_PAN_MOVE:
2313 case SCROLL_PAN_REDRAW:
2314 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2315 if (scrollback_phys_max < 0)
2316 scrollback_phys_max = 0;
2317 break;
2318 default:
2319 scrollback_phys_max = 0;
2320 break;
2321 }
2322
2323 scrollback_max = 0;
2324 scrollback_current = 0;
2325
2326 if (!fbcon_is_inactive(vc, info)) {
2327 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2328 ops->update_start(info);
2329 }
2330
2331 fbcon_set_palette(vc, color_table);
2332 fbcon_clear_margins(vc, 0);
2333
2334 if (logo_shown == FBCON_LOGO_DRAW) {
2335
2336 logo_shown = fg_console;
2337 /* This is protected above by initmem_freed */
2338 fb_show_logo(info, ops->rotate);
2339 update_region(vc,
2340 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2341 vc->vc_size_row * (vc->vc_bottom -
2342 vc->vc_top) / 2);
2343 return 0;
2344 }
2345 return 1;
2346 }
2347
2348 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2349 int blank)
2350 {
2351 struct fb_event event;
2352
2353 if (blank) {
2354 unsigned short charmask = vc->vc_hi_font_mask ?
2355 0x1ff : 0xff;
2356 unsigned short oldc;
2357
2358 oldc = vc->vc_video_erase_char;
2359 vc->vc_video_erase_char &= charmask;
2360 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2361 vc->vc_video_erase_char = oldc;
2362 }
2363
2364
2365 event.info = info;
2366 event.data = &blank;
2367 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2368 }
2369
2370 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2371 {
2372 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2373 struct fbcon_ops *ops = info->fbcon_par;
2374
2375 if (mode_switch) {
2376 struct fb_var_screeninfo var = info->var;
2377
2378 ops->graphics = 1;
2379
2380 if (!blank) {
2381 if (info->fbops->fb_save_state)
2382 info->fbops->fb_save_state(info);
2383 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2384 fb_set_var(info, &var);
2385 ops->graphics = 0;
2386 ops->var = info->var;
2387 } else if (info->fbops->fb_restore_state)
2388 info->fbops->fb_restore_state(info);
2389 }
2390
2391 if (!fbcon_is_inactive(vc, info)) {
2392 if (ops->blank_state != blank) {
2393 ops->blank_state = blank;
2394 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2395 ops->cursor_flash = (!blank);
2396
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(p->rotate, info->var.xres, info->var.yres);
2978 rows = FBCON_SWAP(p->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 mapped = 0;
3535 info = registered_fb[i];
3536
3537 if (info == NULL)
3538 continue;
3539
3540 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3541 if (con2fb_map[j] == i)
3542 mapped = 1;
3543 }
3544
3545 if (mapped) {
3546 if (info->fbops->fb_release)
3547 info->fbops->fb_release(info, 0);
3548 module_put(info->fbops->owner);
3549
3550 if (info->fbcon_par) {
3551 struct fbcon_ops *ops = info->fbcon_par;
3552
3553 fbcon_del_cursor_timer(info);
3554 kfree(ops->cursor_src);
3555 kfree(info->fbcon_par);
3556 info->fbcon_par = NULL;
3557 }
3558
3559 if (info->queue.func == fb_flashcursor)
3560 info->queue.func = NULL;
3561 }
3562 }
3563
3564 fbcon_has_exited = 1;
3565 }
3566
3567 static int __init fb_console_init(void)
3568 {
3569 int i;
3570
3571 acquire_console_sem();
3572 fb_register_client(&fbcon_event_notifier);
3573 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3574
3575 if (IS_ERR(fbcon_device)) {
3576 printk(KERN_WARNING "Unable to create device "
3577 "for fbcon; errno = %ld\n",
3578 PTR_ERR(fbcon_device));
3579 fbcon_device = NULL;
3580 } else
3581 fbcon_init_device();
3582
3583 for (i = 0; i < MAX_NR_CONSOLES; i++)
3584 con2fb_map[i] = -1;
3585
3586 release_console_sem();
3587 fbcon_start();
3588 return 0;
3589 }
3590
3591 module_init(fb_console_init);
3592
3593 #ifdef MODULE
3594
3595 static void __exit fbcon_deinit_device(void)
3596 {
3597 int i;
3598
3599 if (fbcon_has_sysfs) {
3600 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3601 device_remove_file(fbcon_device, &device_attrs[i]);
3602
3603 fbcon_has_sysfs = 0;
3604 }
3605 }
3606
3607 static void __exit fb_console_exit(void)
3608 {
3609 acquire_console_sem();
3610 fb_unregister_client(&fbcon_event_notifier);
3611 fbcon_deinit_device();
3612 device_destroy(fb_class, MKDEV(0, 0));
3613 fbcon_exit();
3614 release_console_sem();
3615 unregister_con_driver(&fb_con);
3616 }
3617
3618 module_exit(fb_console_exit);
3619
3620 #endif
3621
3622 MODULE_LICENSE("GPL");
WRT350N Kernel Patches