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libata pata_via: ACPI checks for 80wire cable
[pv_ops_mirror.git] / drivers / video / console / fbcon.c
blobe58c87b3e3a0f74cf45bab3c930f509b30ca3cfa
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 #include <asm/uaccess.h>
82 #ifdef CONFIG_ATARI
83 #include <asm/atariints.h>
84 #endif
85 #ifdef CONFIG_MAC
86 #include <asm/macints.h>
87 #endif
88 #if defined(__mc68000__) || defined(CONFIG_APUS)
89 #include <asm/machdep.h>
90 #include <asm/setup.h>
91 #endif
92
93 #include "fbcon.h"
94
95 #ifdef FBCONDEBUG
96 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
97 #else
98 # define DPRINTK(fmt, args...)
99 #endif
100
101 enum {
102 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
103 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
104 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
105 };
106
107 static struct display fb_display[MAX_NR_CONSOLES];
108
109 static signed char con2fb_map[MAX_NR_CONSOLES];
110 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
111 #ifndef MODULE
112 static int logo_height;
113 #endif
114 static int logo_lines;
115 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
116 enums. */
117 static int logo_shown = FBCON_LOGO_CANSHOW;
118 /* Software scrollback */
119 static int fbcon_softback_size = 32768;
120 static unsigned long softback_buf, softback_curr;
121 static unsigned long softback_in;
122 static unsigned long softback_top, softback_end;
123 static int softback_lines;
124 /* console mappings */
125 static int first_fb_vc;
126 static int last_fb_vc = MAX_NR_CONSOLES - 1;
127 static int fbcon_is_default = 1;
128 static int fbcon_has_exited;
129 static int primary_device = -1;
130
131 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
132 static int map_override;
133
134 static inline void fbcon_map_override(void)
135 {
136 map_override = 1;
137 }
138 #else
139 static inline void fbcon_map_override(void)
140 {
141 }
142 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
143
144 /* font data */
145 static char fontname[40];
146
147 /* current fb_info */
148 static int info_idx = -1;
149
150 /* console rotation */
151 static int rotate;
152 static int fbcon_has_sysfs;
153
154 static const struct consw fb_con;
155
156 #define CM_SOFTBACK (8)
157
158 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
159
160 static int fbcon_set_origin(struct vc_data *);
161
162 #define CURSOR_DRAW_DELAY (1)
163
164 /* # VBL ints between cursor state changes */
165 #define ATARI_CURSOR_BLINK_RATE (42)
166 #define MAC_CURSOR_BLINK_RATE (32)
167 #define DEFAULT_CURSOR_BLINK_RATE (20)
168
169 static int vbl_cursor_cnt;
170 static int fbcon_cursor_noblink;
171
172 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
173
174 /*
175 * Interface used by the world
176 */
177
178 static const char *fbcon_startup(void);
179 static void fbcon_init(struct vc_data *vc, int init);
180 static void fbcon_deinit(struct vc_data *vc);
181 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
182 int width);
183 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
184 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
185 int count, int ypos, int xpos);
186 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
187 static void fbcon_cursor(struct vc_data *vc, int mode);
188 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
189 int count);
190 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
191 int height, int width);
192 static int fbcon_switch(struct vc_data *vc);
193 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
194 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
195 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
196
197 /*
198 * Internal routines
199 */
200 static __inline__ void ywrap_up(struct vc_data *vc, int count);
201 static __inline__ void ywrap_down(struct vc_data *vc, int count);
202 static __inline__ void ypan_up(struct vc_data *vc, int count);
203 static __inline__ void ypan_down(struct vc_data *vc, int count);
204 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
205 int dy, int dx, int height, int width, u_int y_break);
206 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
207 int unit);
208 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
209 int line, int count, int dy);
210 static void fbcon_modechanged(struct fb_info *info);
211 static void fbcon_set_all_vcs(struct fb_info *info);
212 static void fbcon_start(void);
213 static void fbcon_exit(void);
214 static struct device *fbcon_device;
215
216 #ifdef CONFIG_MAC
217 /*
218 * On the Macintoy, there may or may not be a working VBL int. We need to probe
219 */
220 static int vbl_detected;
221
222 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
223 {
224 vbl_detected++;
225 return IRQ_HANDLED;
226 }
227 #endif
228
229 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
230 static inline void fbcon_set_rotation(struct fb_info *info)
231 {
232 struct fbcon_ops *ops = info->fbcon_par;
233
234 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
235 ops->p->con_rotate < 4)
236 ops->rotate = ops->p->con_rotate;
237 else
238 ops->rotate = 0;
239 }
240
241 static void fbcon_rotate(struct fb_info *info, u32 rotate)
242 {
243 struct fbcon_ops *ops= info->fbcon_par;
244 struct fb_info *fb_info;
245
246 if (!ops || ops->currcon == -1)
247 return;
248
249 fb_info = registered_fb[con2fb_map[ops->currcon]];
250
251 if (info == fb_info) {
252 struct display *p = &fb_display[ops->currcon];
253
254 if (rotate < 4)
255 p->con_rotate = rotate;
256 else
257 p->con_rotate = 0;
258
259 fbcon_modechanged(info);
260 }
261 }
262
263 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
264 {
265 struct fbcon_ops *ops = info->fbcon_par;
266 struct vc_data *vc;
267 struct display *p;
268 int i;
269
270 if (!ops || ops->currcon < 0 || rotate > 3)
271 return;
272
273 for (i = first_fb_vc; i <= last_fb_vc; i++) {
274 vc = vc_cons[i].d;
275 if (!vc || vc->vc_mode != KD_TEXT ||
276 registered_fb[con2fb_map[i]] != info)
277 continue;
278
279 p = &fb_display[vc->vc_num];
280 p->con_rotate = rotate;
281 }
282
283 fbcon_set_all_vcs(info);
284 }
285 #else
286 static inline void fbcon_set_rotation(struct fb_info *info)
287 {
288 struct fbcon_ops *ops = info->fbcon_par;
289
290 ops->rotate = FB_ROTATE_UR;
291 }
292
293 static void fbcon_rotate(struct fb_info *info, u32 rotate)
294 {
295 return;
296 }
297
298 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
299 {
300 return;
301 }
302 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
303
304 static int fbcon_get_rotate(struct fb_info *info)
305 {
306 struct fbcon_ops *ops = info->fbcon_par;
307
308 return (ops) ? ops->rotate : 0;
309 }
310
311 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
312 {
313 struct fbcon_ops *ops = info->fbcon_par;
314
315 return (info->state != FBINFO_STATE_RUNNING ||
316 vc->vc_mode != KD_TEXT || ops->graphics);
317 }
318
319 static inline int get_color(struct vc_data *vc, struct fb_info *info,
320 u16 c, int is_fg)
321 {
322 int depth = fb_get_color_depth(&info->var, &info->fix);
323 int color = 0;
324
325 if (console_blanked) {
326 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
327
328 c = vc->vc_video_erase_char & charmask;
329 }
330
331 if (depth != 1)
332 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
333 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
334
335 switch (depth) {
336 case 1:
337 {
338 int col = ~(0xfff << (max(info->var.green.length,
339 max(info->var.red.length,
340 info->var.blue.length)))) & 0xff;
341
342 /* 0 or 1 */
343 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
344 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
345
346 if (console_blanked)
347 fg = bg;
348
349 color = (is_fg) ? fg : bg;
350 break;
351 }
352 case 2:
353 /*
354 * Scale down 16-colors to 4 colors. Default 4-color palette
355 * is grayscale. However, simply dividing the values by 4
356 * will not work, as colors 1, 2 and 3 will be scaled-down
357 * to zero rendering them invisible. So empirically convert
358 * colors to a sane 4-level grayscale.
359 */
360 switch (color) {
361 case 0:
362 color = 0; /* black */
363 break;
364 case 1 ... 6:
365 color = 2; /* white */
366 break;
367 case 7 ... 8:
368 color = 1; /* gray */
369 break;
370 default:
371 color = 3; /* intense white */
372 break;
373 }
374 break;
375 case 3:
376 /*
377 * Last 8 entries of default 16-color palette is a more intense
378 * version of the first 8 (i.e., same chrominance, different
379 * luminance).
380 */
381 color &= 7;
382 break;
383 }
384
385
386 return color;
387 }
388
389 static void fbcon_update_softback(struct vc_data *vc)
390 {
391 int l = fbcon_softback_size / vc->vc_size_row;
392
393 if (l > 5)
394 softback_end = softback_buf + l * vc->vc_size_row;
395 else
396 /* Smaller scrollback makes no sense, and 0 would screw
397 the operation totally */
398 softback_top = 0;
399 }
400
401 static void fb_flashcursor(struct work_struct *work)
402 {
403 struct fb_info *info = container_of(work, struct fb_info, queue);
404 struct fbcon_ops *ops = info->fbcon_par;
405 struct display *p;
406 struct vc_data *vc = NULL;
407 int c;
408 int mode;
409
410 acquire_console_sem();
411 if (ops && ops->currcon != -1)
412 vc = vc_cons[ops->currcon].d;
413
414 if (!vc || !CON_IS_VISIBLE(vc) ||
415 registered_fb[con2fb_map[vc->vc_num]] != info ||
416 vc->vc_deccm != 1) {
417 release_console_sem();
418 return;
419 }
420
421 p = &fb_display[vc->vc_num];
422 c = scr_readw((u16 *) vc->vc_pos);
423 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
424 CM_ERASE : CM_DRAW;
425 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
426 get_color(vc, info, c, 0));
427 release_console_sem();
428 }
429
430 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
431 static int cursor_blink_rate;
432 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
433 {
434 struct fb_info *info = dev_id;
435
436 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
437 schedule_work(&info->queue);
438 vbl_cursor_cnt = cursor_blink_rate;
439 }
440 return IRQ_HANDLED;
441 }
442 #endif
443
444 static void cursor_timer_handler(unsigned long dev_addr)
445 {
446 struct fb_info *info = (struct fb_info *) dev_addr;
447 struct fbcon_ops *ops = info->fbcon_par;
448
449 schedule_work(&info->queue);
450 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
451 }
452
453 static void fbcon_add_cursor_timer(struct fb_info *info)
454 {
455 struct fbcon_ops *ops = info->fbcon_par;
456
457 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
458 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
459 !fbcon_cursor_noblink) {
460 if (!info->queue.func)
461 INIT_WORK(&info->queue, fb_flashcursor);
462
463 init_timer(&ops->cursor_timer);
464 ops->cursor_timer.function = cursor_timer_handler;
465 ops->cursor_timer.expires = jiffies + HZ / 5;
466 ops->cursor_timer.data = (unsigned long ) info;
467 add_timer(&ops->cursor_timer);
468 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
469 }
470 }
471
472 static void fbcon_del_cursor_timer(struct fb_info *info)
473 {
474 struct fbcon_ops *ops = info->fbcon_par;
475
476 if (info->queue.func == fb_flashcursor &&
477 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
478 del_timer_sync(&ops->cursor_timer);
479 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
480 }
481 }
482
483 #ifndef MODULE
484 static int __init fb_console_setup(char *this_opt)
485 {
486 char *options;
487 int i, j;
488
489 if (!this_opt || !*this_opt)
490 return 1;
491
492 while ((options = strsep(&this_opt, ",")) != NULL) {
493 if (!strncmp(options, "font:", 5))
494 strcpy(fontname, options + 5);
495
496 if (!strncmp(options, "scrollback:", 11)) {
497 options += 11;
498 if (*options) {
499 fbcon_softback_size = simple_strtoul(options, &options, 0);
500 if (*options == 'k' || *options == 'K') {
501 fbcon_softback_size *= 1024;
502 options++;
503 }
504 if (*options != ',')
505 return 1;
506 options++;
507 } else
508 return 1;
509 }
510
511 if (!strncmp(options, "map:", 4)) {
512 options += 4;
513 if (*options) {
514 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
515 if (!options[j])
516 j = 0;
517 con2fb_map_boot[i] =
518 (options[j++]-'0') % FB_MAX;
519 }
520
521 fbcon_map_override();
522 }
523
524 return 1;
525 }
526
527 if (!strncmp(options, "vc:", 3)) {
528 options += 3;
529 if (*options)
530 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
531 if (first_fb_vc < 0)
532 first_fb_vc = 0;
533 if (*options++ == '-')
534 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
535 fbcon_is_default = 0;
536 }
537
538 if (!strncmp(options, "rotate:", 7)) {
539 options += 7;
540 if (*options)
541 rotate = simple_strtoul(options, &options, 0);
542 if (rotate > 3)
543 rotate = 0;
544 }
545 }
546 return 1;
547 }
548
549 __setup("fbcon=", fb_console_setup);
550 #endif
551
552 static int search_fb_in_map(int idx)
553 {
554 int i, retval = 0;
555
556 for (i = first_fb_vc; i <= last_fb_vc; i++) {
557 if (con2fb_map[i] == idx)
558 retval = 1;
559 }
560 return retval;
561 }
562
563 static int search_for_mapped_con(void)
564 {
565 int i, retval = 0;
566
567 for (i = first_fb_vc; i <= last_fb_vc; i++) {
568 if (con2fb_map[i] != -1)
569 retval = 1;
570 }
571 return retval;
572 }
573
574 static int fbcon_takeover(int show_logo)
575 {
576 int err, i;
577
578 if (!num_registered_fb)
579 return -ENODEV;
580
581 if (!show_logo)
582 logo_shown = FBCON_LOGO_DONTSHOW;
583
584 for (i = first_fb_vc; i <= last_fb_vc; i++)
585 con2fb_map[i] = info_idx;
586
587 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
588 fbcon_is_default);
589
590 if (err) {
591 for (i = first_fb_vc; i <= last_fb_vc; i++) {
592 con2fb_map[i] = -1;
593 }
594 info_idx = -1;
595 }
596
597 return err;
598 }
599
600 #ifdef MODULE
601 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
602 int cols, int rows, int new_cols, int new_rows)
603 {
604 logo_shown = FBCON_LOGO_DONTSHOW;
605 }
606 #else
607 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
608 int cols, int rows, int new_cols, int new_rows)
609 {
610 /* Need to make room for the logo */
611 struct fbcon_ops *ops = info->fbcon_par;
612 int cnt, erase = vc->vc_video_erase_char, step;
613 unsigned short *save = NULL, *r, *q;
614
615 if (info->flags & FBINFO_MODULE) {
616 logo_shown = FBCON_LOGO_DONTSHOW;
617 return;
618 }
619
620 /*
621 * remove underline attribute from erase character
622 * if black and white framebuffer.
623 */
624 if (fb_get_color_depth(&info->var, &info->fix) == 1)
625 erase &= ~0x400;
626 logo_height = fb_prepare_logo(info, ops->rotate);
627 logo_lines = (logo_height + vc->vc_font.height - 1) /
628 vc->vc_font.height;
629 q = (unsigned short *) (vc->vc_origin +
630 vc->vc_size_row * rows);
631 step = logo_lines * cols;
632 for (r = q - logo_lines * cols; r < q; r++)
633 if (scr_readw(r) != vc->vc_video_erase_char)
634 break;
635 if (r != q && new_rows >= rows + logo_lines) {
636 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
637 if (save) {
638 int i = cols < new_cols ? cols : new_cols;
639 scr_memsetw(save, erase, logo_lines * new_cols * 2);
640 r = q - step;
641 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
642 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
643 r = q;
644 }
645 }
646 if (r == q) {
647 /* We can scroll screen down */
648 r = q - step - cols;
649 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
650 scr_memcpyw(r + step, r, vc->vc_size_row);
651 r -= cols;
652 }
653 if (!save) {
654 int lines;
655 if (vc->vc_y + logo_lines >= rows)
656 lines = rows - vc->vc_y - 1;
657 else
658 lines = logo_lines;
659 vc->vc_y += lines;
660 vc->vc_pos += lines * vc->vc_size_row;
661 }
662 }
663 scr_memsetw((unsigned short *) vc->vc_origin,
664 erase,
665 vc->vc_size_row * logo_lines);
666
667 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
668 fbcon_clear_margins(vc, 0);
669 update_screen(vc);
670 }
671
672 if (save) {
673 q = (unsigned short *) (vc->vc_origin +
674 vc->vc_size_row *
675 rows);
676 scr_memcpyw(q, save, logo_lines * new_cols * 2);
677 vc->vc_y += logo_lines;
678 vc->vc_pos += logo_lines * vc->vc_size_row;
679 kfree(save);
680 }
681
682 if (logo_lines > vc->vc_bottom) {
683 logo_shown = FBCON_LOGO_CANSHOW;
684 printk(KERN_INFO
685 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
686 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
687 logo_shown = FBCON_LOGO_DRAW;
688 vc->vc_top = logo_lines;
689 }
690 }
691 #endif /* MODULE */
692
693 #ifdef CONFIG_FB_TILEBLITTING
694 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
695 {
696 struct fbcon_ops *ops = info->fbcon_par;
697
698 ops->p = &fb_display[vc->vc_num];
699
700 if ((info->flags & FBINFO_MISC_TILEBLITTING))
701 fbcon_set_tileops(vc, info);
702 else {
703 fbcon_set_rotation(info);
704 fbcon_set_bitops(ops);
705 }
706 }
707
708 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
709 {
710 int err = 0;
711
712 if (info->flags & FBINFO_MISC_TILEBLITTING &&
713 info->tileops->fb_get_tilemax(info) < charcount)
714 err = 1;
715
716 return err;
717 }
718 #else
719 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
720 {
721 struct fbcon_ops *ops = info->fbcon_par;
722
723 info->flags &= ~FBINFO_MISC_TILEBLITTING;
724 ops->p = &fb_display[vc->vc_num];
725 fbcon_set_rotation(info);
726 fbcon_set_bitops(ops);
727 }
728
729 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
730 {
731 return 0;
732 }
733
734 #endif /* CONFIG_MISC_TILEBLITTING */
735
736
737 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
738 int unit, int oldidx)
739 {
740 struct fbcon_ops *ops = NULL;
741 int err = 0;
742
743 if (!try_module_get(info->fbops->owner))
744 err = -ENODEV;
745
746 if (!err && info->fbops->fb_open &&
747 info->fbops->fb_open(info, 0))
748 err = -ENODEV;
749
750 if (!err) {
751 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
752 if (!ops)
753 err = -ENOMEM;
754 }
755
756 if (!err) {
757 info->fbcon_par = ops;
758
759 if (vc)
760 set_blitting_type(vc, info);
761 }
762
763 if (err) {
764 con2fb_map[unit] = oldidx;
765 module_put(info->fbops->owner);
766 }
767
768 return err;
769 }
770
771 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
772 struct fb_info *newinfo, int unit,
773 int oldidx, int found)
774 {
775 struct fbcon_ops *ops = oldinfo->fbcon_par;
776 int err = 0;
777
778 if (oldinfo->fbops->fb_release &&
779 oldinfo->fbops->fb_release(oldinfo, 0)) {
780 con2fb_map[unit] = oldidx;
781 if (!found && newinfo->fbops->fb_release)
782 newinfo->fbops->fb_release(newinfo, 0);
783 if (!found)
784 module_put(newinfo->fbops->owner);
785 err = -ENODEV;
786 }
787
788 if (!err) {
789 fbcon_del_cursor_timer(oldinfo);
790 kfree(ops->cursor_state.mask);
791 kfree(ops->cursor_data);
792 kfree(ops->fontbuffer);
793 kfree(oldinfo->fbcon_par);
794 oldinfo->fbcon_par = NULL;
795 module_put(oldinfo->fbops->owner);
796 /*
797 If oldinfo and newinfo are driving the same hardware,
798 the fb_release() method of oldinfo may attempt to
799 restore the hardware state. This will leave the
800 newinfo in an undefined state. Thus, a call to
801 fb_set_par() may be needed for the newinfo.
802 */
803 if (newinfo->fbops->fb_set_par)
804 newinfo->fbops->fb_set_par(newinfo);
805 }
806
807 return err;
808 }
809
810 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
811 int unit, int show_logo)
812 {
813 struct fbcon_ops *ops = info->fbcon_par;
814
815 ops->currcon = fg_console;
816
817 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
818 info->fbops->fb_set_par(info);
819
820 ops->flags |= FBCON_FLAGS_INIT;
821 ops->graphics = 0;
822 fbcon_set_disp(info, &info->var, unit);
823
824 if (show_logo) {
825 struct vc_data *fg_vc = vc_cons[fg_console].d;
826 struct fb_info *fg_info =
827 registered_fb[con2fb_map[fg_console]];
828
829 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
830 fg_vc->vc_rows, fg_vc->vc_cols,
831 fg_vc->vc_rows);
832 }
833
834 update_screen(vc_cons[fg_console].d);
835 }
836
837 /**
838 * set_con2fb_map - map console to frame buffer device
839 * @unit: virtual console number to map
840 * @newidx: frame buffer index to map virtual console to
841 * @user: user request
842 *
843 * Maps a virtual console @unit to a frame buffer device
844 * @newidx.
845 */
846 static int set_con2fb_map(int unit, int newidx, int user)
847 {
848 struct vc_data *vc = vc_cons[unit].d;
849 int oldidx = con2fb_map[unit];
850 struct fb_info *info = registered_fb[newidx];
851 struct fb_info *oldinfo = NULL;
852 int found, err = 0;
853
854 if (oldidx == newidx)
855 return 0;
856
857 if (!info || fbcon_has_exited)
858 return -EINVAL;
859
860 if (!err && !search_for_mapped_con()) {
861 info_idx = newidx;
862 return fbcon_takeover(0);
863 }
864
865 if (oldidx != -1)
866 oldinfo = registered_fb[oldidx];
867
868 found = search_fb_in_map(newidx);
869
870 acquire_console_sem();
871 con2fb_map[unit] = newidx;
872 if (!err && !found)
873 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
874
875
876 /*
877 * If old fb is not mapped to any of the consoles,
878 * fbcon should release it.
879 */
880 if (!err && oldinfo && !search_fb_in_map(oldidx))
881 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
882 found);
883
884 if (!err) {
885 int show_logo = (fg_console == 0 && !user &&
886 logo_shown != FBCON_LOGO_DONTSHOW);
887
888 if (!found)
889 fbcon_add_cursor_timer(info);
890 con2fb_map_boot[unit] = newidx;
891 con2fb_init_display(vc, info, unit, show_logo);
892 }
893
894 if (!search_fb_in_map(info_idx))
895 info_idx = newidx;
896
897 release_console_sem();
898 return err;
899 }
900
901 /*
902 * Low Level Operations
903 */
904 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
905 static int var_to_display(struct display *disp,
906 struct fb_var_screeninfo *var,
907 struct fb_info *info)
908 {
909 disp->xres_virtual = var->xres_virtual;
910 disp->yres_virtual = var->yres_virtual;
911 disp->bits_per_pixel = var->bits_per_pixel;
912 disp->grayscale = var->grayscale;
913 disp->nonstd = var->nonstd;
914 disp->accel_flags = var->accel_flags;
915 disp->height = var->height;
916 disp->width = var->width;
917 disp->red = var->red;
918 disp->green = var->green;
919 disp->blue = var->blue;
920 disp->transp = var->transp;
921 disp->rotate = var->rotate;
922 disp->mode = fb_match_mode(var, &info->modelist);
923 if (disp->mode == NULL)
924 /* This should not happen */
925 return -EINVAL;
926 return 0;
927 }
928
929 static void display_to_var(struct fb_var_screeninfo *var,
930 struct display *disp)
931 {
932 fb_videomode_to_var(var, disp->mode);
933 var->xres_virtual = disp->xres_virtual;
934 var->yres_virtual = disp->yres_virtual;
935 var->bits_per_pixel = disp->bits_per_pixel;
936 var->grayscale = disp->grayscale;
937 var->nonstd = disp->nonstd;
938 var->accel_flags = disp->accel_flags;
939 var->height = disp->height;
940 var->width = disp->width;
941 var->red = disp->red;
942 var->green = disp->green;
943 var->blue = disp->blue;
944 var->transp = disp->transp;
945 var->rotate = disp->rotate;
946 }
947
948 static const char *fbcon_startup(void)
949 {
950 const char *display_desc = "frame buffer device";
951 struct display *p = &fb_display[fg_console];
952 struct vc_data *vc = vc_cons[fg_console].d;
953 const struct font_desc *font = NULL;
954 struct module *owner;
955 struct fb_info *info = NULL;
956 struct fbcon_ops *ops;
957 int rows, cols;
958 int irqres;
959
960 irqres = 1;
961 /*
962 * If num_registered_fb is zero, this is a call for the dummy part.
963 * The frame buffer devices weren't initialized yet.
964 */
965 if (!num_registered_fb || info_idx == -1)
966 return display_desc;
967 /*
968 * Instead of blindly using registered_fb[0], we use info_idx, set by
969 * fb_console_init();
970 */
971 info = registered_fb[info_idx];
972 if (!info)
973 return NULL;
974
975 owner = info->fbops->owner;
976 if (!try_module_get(owner))
977 return NULL;
978 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
979 module_put(owner);
980 return NULL;
981 }
982
983 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
984 if (!ops) {
985 module_put(owner);
986 return NULL;
987 }
988
989 ops->currcon = -1;
990 ops->graphics = 1;
991 ops->cur_rotate = -1;
992 info->fbcon_par = ops;
993 p->con_rotate = rotate;
994 set_blitting_type(vc, info);
995
996 if (info->fix.type != FB_TYPE_TEXT) {
997 if (fbcon_softback_size) {
998 if (!softback_buf) {
999 softback_buf =
1000 (unsigned long)
1001 kmalloc(fbcon_softback_size,
1002 GFP_KERNEL);
1003 if (!softback_buf) {
1004 fbcon_softback_size = 0;
1005 softback_top = 0;
1006 }
1007 }
1008 } else {
1009 if (softback_buf) {
1010 kfree((void *) softback_buf);
1011 softback_buf = 0;
1012 softback_top = 0;
1013 }
1014 }
1015 if (softback_buf)
1016 softback_in = softback_top = softback_curr =
1017 softback_buf;
1018 softback_lines = 0;
1019 }
1020
1021 /* Setup default font */
1022 if (!p->fontdata) {
1023 if (!fontname[0] || !(font = find_font(fontname)))
1024 font = get_default_font(info->var.xres,
1025 info->var.yres,
1026 info->pixmap.blit_x,
1027 info->pixmap.blit_y);
1028 vc->vc_font.width = font->width;
1029 vc->vc_font.height = font->height;
1030 vc->vc_font.data = (void *)(p->fontdata = font->data);
1031 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1032 }
1033
1034 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1035 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1036 cols /= vc->vc_font.width;
1037 rows /= vc->vc_font.height;
1038 vc_resize(vc, cols, rows);
1039
1040 DPRINTK("mode: %s\n", info->fix.id);
1041 DPRINTK("visual: %d\n", info->fix.visual);
1042 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1043 info->var.yres,
1044 info->var.bits_per_pixel);
1045
1046 #ifdef CONFIG_ATARI
1047 if (MACH_IS_ATARI) {
1048 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1049 irqres =
1050 request_irq(IRQ_AUTO_4, fb_vbl_handler,
1051 IRQ_TYPE_PRIO, "framebuffer vbl",
1052 info);
1053 }
1054 #endif /* CONFIG_ATARI */
1055
1056 #ifdef CONFIG_MAC
1057 /*
1058 * On a Macintoy, the VBL interrupt may or may not be active.
1059 * As interrupt based cursor is more reliable and race free, we
1060 * probe for VBL interrupts.
1061 */
1062 if (MACH_IS_MAC) {
1063 int ct = 0;
1064 /*
1065 * Probe for VBL: set temp. handler ...
1066 */
1067 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1068 "framebuffer vbl", info);
1069 vbl_detected = 0;
1070
1071 /*
1072 * ... and spin for 20 ms ...
1073 */
1074 while (!vbl_detected && ++ct < 1000)
1075 udelay(20);
1076
1077 if (ct == 1000)
1078 printk
1079 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1080
1081 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1082
1083 if (vbl_detected) {
1084 /*
1085 * interrupt based cursor ok
1086 */
1087 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1088 irqres =
1089 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1090 "framebuffer vbl", info);
1091 } else {
1092 /*
1093 * VBL not detected: fall through, use timer based cursor
1094 */
1095 irqres = 1;
1096 }
1097 }
1098 #endif /* CONFIG_MAC */
1099
1100 fbcon_add_cursor_timer(info);
1101 fbcon_has_exited = 0;
1102 return display_desc;
1103 }
1104
1105 static void fbcon_init(struct vc_data *vc, int init)
1106 {
1107 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1108 struct fbcon_ops *ops;
1109 struct vc_data **default_mode = vc->vc_display_fg;
1110 struct vc_data *svc = *default_mode;
1111 struct display *t, *p = &fb_display[vc->vc_num];
1112 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1113 int cap;
1114
1115 if (info_idx == -1 || info == NULL)
1116 return;
1117
1118 cap = info->flags;
1119
1120 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1121 (info->fix.type == FB_TYPE_TEXT))
1122 logo = 0;
1123
1124 if (var_to_display(p, &info->var, info))
1125 return;
1126
1127 if (!info->fbcon_par)
1128 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1129
1130 /* If we are not the first console on this
1131 fb, copy the font from that console */
1132 t = &fb_display[fg_console];
1133 if (!p->fontdata) {
1134 if (t->fontdata) {
1135 struct vc_data *fvc = vc_cons[fg_console].d;
1136
1137 vc->vc_font.data = (void *)(p->fontdata =
1138 fvc->vc_font.data);
1139 vc->vc_font.width = fvc->vc_font.width;
1140 vc->vc_font.height = fvc->vc_font.height;
1141 p->userfont = t->userfont;
1142
1143 if (p->userfont)
1144 REFCOUNT(p->fontdata)++;
1145 } else {
1146 const struct font_desc *font = NULL;
1147
1148 if (!fontname[0] || !(font = find_font(fontname)))
1149 font = get_default_font(info->var.xres,
1150 info->var.yres,
1151 info->pixmap.blit_x,
1152 info->pixmap.blit_y);
1153 vc->vc_font.width = font->width;
1154 vc->vc_font.height = font->height;
1155 vc->vc_font.data = (void *)(p->fontdata = font->data);
1156 vc->vc_font.charcount = 256; /* FIXME Need to
1157 support more fonts */
1158 }
1159 }
1160
1161 if (p->userfont)
1162 charcnt = FNTCHARCNT(p->fontdata);
1163
1164 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1165 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1166 if (charcnt == 256) {
1167 vc->vc_hi_font_mask = 0;
1168 } else {
1169 vc->vc_hi_font_mask = 0x100;
1170 if (vc->vc_can_do_color)
1171 vc->vc_complement_mask <<= 1;
1172 }
1173
1174 if (!*svc->vc_uni_pagedir_loc)
1175 con_set_default_unimap(svc);
1176 if (!*vc->vc_uni_pagedir_loc)
1177 con_copy_unimap(vc, svc);
1178
1179 ops = info->fbcon_par;
1180 p->con_rotate = rotate;
1181 set_blitting_type(vc, info);
1182
1183 cols = vc->vc_cols;
1184 rows = vc->vc_rows;
1185 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1186 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1187 new_cols /= vc->vc_font.width;
1188 new_rows /= vc->vc_font.height;
1189 vc_resize(vc, new_cols, new_rows);
1190
1191 /*
1192 * We must always set the mode. The mode of the previous console
1193 * driver could be in the same resolution but we are using different
1194 * hardware so we have to initialize the hardware.
1195 *
1196 * We need to do it in fbcon_init() to prevent screen corruption.
1197 */
1198 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1199 if (info->fbops->fb_set_par &&
1200 !(ops->flags & FBCON_FLAGS_INIT))
1201 info->fbops->fb_set_par(info);
1202 ops->flags |= FBCON_FLAGS_INIT;
1203 }
1204
1205 ops->graphics = 0;
1206
1207 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1208 !(cap & FBINFO_HWACCEL_DISABLED))
1209 p->scrollmode = SCROLL_MOVE;
1210 else /* default to something safe */
1211 p->scrollmode = SCROLL_REDRAW;
1212
1213 /*
1214 * ++guenther: console.c:vc_allocate() relies on initializing
1215 * vc_{cols,rows}, but we must not set those if we are only
1216 * resizing the console.
1217 */
1218 if (!init) {
1219 vc->vc_cols = new_cols;
1220 vc->vc_rows = new_rows;
1221 }
1222
1223 if (logo)
1224 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1225
1226 if (vc == svc && softback_buf)
1227 fbcon_update_softback(vc);
1228
1229 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1230 ops->rotate = FB_ROTATE_UR;
1231 set_blitting_type(vc, info);
1232 }
1233
1234 ops->p = &fb_display[fg_console];
1235 }
1236
1237 static void fbcon_free_font(struct display *p)
1238 {
1239 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1240 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1241 p->fontdata = NULL;
1242 p->userfont = 0;
1243 }
1244
1245 static void fbcon_deinit(struct vc_data *vc)
1246 {
1247 struct display *p = &fb_display[vc->vc_num];
1248 struct fb_info *info;
1249 struct fbcon_ops *ops;
1250 int idx;
1251
1252 fbcon_free_font(p);
1253 idx = con2fb_map[vc->vc_num];
1254
1255 if (idx == -1)
1256 goto finished;
1257
1258 info = registered_fb[idx];
1259
1260 if (!info)
1261 goto finished;
1262
1263 ops = info->fbcon_par;
1264
1265 if (!ops)
1266 goto finished;
1267
1268 if (CON_IS_VISIBLE(vc))
1269 fbcon_del_cursor_timer(info);
1270
1271 ops->flags &= ~FBCON_FLAGS_INIT;
1272 finished:
1273
1274 if (!con_is_bound(&fb_con))
1275 fbcon_exit();
1276
1277 return;
1278 }
1279
1280 /* ====================================================================== */
1281
1282 /* fbcon_XXX routines - interface used by the world
1283 *
1284 * This system is now divided into two levels because of complications
1285 * caused by hardware scrolling. Top level functions:
1286 *
1287 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1288 *
1289 * handles y values in range [0, scr_height-1] that correspond to real
1290 * screen positions. y_wrap shift means that first line of bitmap may be
1291 * anywhere on this display. These functions convert lineoffsets to
1292 * bitmap offsets and deal with the wrap-around case by splitting blits.
1293 *
1294 * fbcon_bmove_physical_8() -- These functions fast implementations
1295 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1296 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1297 *
1298 * WARNING:
1299 *
1300 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1301 * Implies should only really hardware scroll in rows. Only reason for
1302 * restriction is simplicity & efficiency at the moment.
1303 */
1304
1305 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1306 int width)
1307 {
1308 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1309 struct fbcon_ops *ops = info->fbcon_par;
1310
1311 struct display *p = &fb_display[vc->vc_num];
1312 u_int y_break;
1313
1314 if (fbcon_is_inactive(vc, info))
1315 return;
1316
1317 if (!height || !width)
1318 return;
1319
1320 /* Split blits that cross physical y_wrap boundary */
1321
1322 y_break = p->vrows - p->yscroll;
1323 if (sy < y_break && sy + height - 1 >= y_break) {
1324 u_int b = y_break - sy;
1325 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1326 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1327 width);
1328 } else
1329 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1330 }
1331
1332 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1333 int count, int ypos, int xpos)
1334 {
1335 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1336 struct display *p = &fb_display[vc->vc_num];
1337 struct fbcon_ops *ops = info->fbcon_par;
1338
1339 if (!fbcon_is_inactive(vc, info))
1340 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1341 get_color(vc, info, scr_readw(s), 1),
1342 get_color(vc, info, scr_readw(s), 0));
1343 }
1344
1345 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1346 {
1347 unsigned short chr;
1348
1349 scr_writew(c, &chr);
1350 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1351 }
1352
1353 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1354 {
1355 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1356 struct fbcon_ops *ops = info->fbcon_par;
1357
1358 if (!fbcon_is_inactive(vc, info))
1359 ops->clear_margins(vc, info, bottom_only);
1360 }
1361
1362 static void fbcon_cursor(struct vc_data *vc, int mode)
1363 {
1364 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1365 struct fbcon_ops *ops = info->fbcon_par;
1366 int y;
1367 int c = scr_readw((u16 *) vc->vc_pos);
1368
1369 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1370 return;
1371
1372 if (vc->vc_cursor_type & 0x10)
1373 fbcon_del_cursor_timer(info);
1374 else
1375 fbcon_add_cursor_timer(info);
1376
1377 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1378 if (mode & CM_SOFTBACK) {
1379 mode &= ~CM_SOFTBACK;
1380 y = softback_lines;
1381 } else {
1382 if (softback_lines)
1383 fbcon_set_origin(vc);
1384 y = 0;
1385 }
1386
1387 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1388 get_color(vc, info, c, 0));
1389 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1390 }
1391
1392 static int scrollback_phys_max = 0;
1393 static int scrollback_max = 0;
1394 static int scrollback_current = 0;
1395
1396 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1397 int unit)
1398 {
1399 struct display *p, *t;
1400 struct vc_data **default_mode, *vc;
1401 struct vc_data *svc;
1402 struct fbcon_ops *ops = info->fbcon_par;
1403 int rows, cols, charcnt = 256;
1404
1405 p = &fb_display[unit];
1406
1407 if (var_to_display(p, var, info))
1408 return;
1409
1410 vc = vc_cons[unit].d;
1411
1412 if (!vc)
1413 return;
1414
1415 default_mode = vc->vc_display_fg;
1416 svc = *default_mode;
1417 t = &fb_display[svc->vc_num];
1418
1419 if (!vc->vc_font.data) {
1420 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1421 vc->vc_font.width = (*default_mode)->vc_font.width;
1422 vc->vc_font.height = (*default_mode)->vc_font.height;
1423 p->userfont = t->userfont;
1424 if (p->userfont)
1425 REFCOUNT(p->fontdata)++;
1426 }
1427 if (p->userfont)
1428 charcnt = FNTCHARCNT(p->fontdata);
1429
1430 var->activate = FB_ACTIVATE_NOW;
1431 info->var.activate = var->activate;
1432 var->yoffset = info->var.yoffset;
1433 var->xoffset = info->var.xoffset;
1434 fb_set_var(info, var);
1435 ops->var = info->var;
1436 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1437 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1438 if (charcnt == 256) {
1439 vc->vc_hi_font_mask = 0;
1440 } else {
1441 vc->vc_hi_font_mask = 0x100;
1442 if (vc->vc_can_do_color)
1443 vc->vc_complement_mask <<= 1;
1444 }
1445
1446 if (!*svc->vc_uni_pagedir_loc)
1447 con_set_default_unimap(svc);
1448 if (!*vc->vc_uni_pagedir_loc)
1449 con_copy_unimap(vc, svc);
1450
1451 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1452 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1453 cols /= vc->vc_font.width;
1454 rows /= vc->vc_font.height;
1455 vc_resize(vc, cols, rows);
1456
1457 if (CON_IS_VISIBLE(vc)) {
1458 update_screen(vc);
1459 if (softback_buf)
1460 fbcon_update_softback(vc);
1461 }
1462 }
1463
1464 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1465 {
1466 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1467 struct fbcon_ops *ops = info->fbcon_par;
1468 struct display *p = &fb_display[vc->vc_num];
1469
1470 p->yscroll += count;
1471 if (p->yscroll >= p->vrows) /* Deal with wrap */
1472 p->yscroll -= p->vrows;
1473 ops->var.xoffset = 0;
1474 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1475 ops->var.vmode |= FB_VMODE_YWRAP;
1476 ops->update_start(info);
1477 scrollback_max += count;
1478 if (scrollback_max > scrollback_phys_max)
1479 scrollback_max = scrollback_phys_max;
1480 scrollback_current = 0;
1481 }
1482
1483 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1484 {
1485 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1486 struct fbcon_ops *ops = info->fbcon_par;
1487 struct display *p = &fb_display[vc->vc_num];
1488
1489 p->yscroll -= count;
1490 if (p->yscroll < 0) /* Deal with wrap */
1491 p->yscroll += p->vrows;
1492 ops->var.xoffset = 0;
1493 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1494 ops->var.vmode |= FB_VMODE_YWRAP;
1495 ops->update_start(info);
1496 scrollback_max -= count;
1497 if (scrollback_max < 0)
1498 scrollback_max = 0;
1499 scrollback_current = 0;
1500 }
1501
1502 static __inline__ void ypan_up(struct vc_data *vc, int count)
1503 {
1504 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1505 struct display *p = &fb_display[vc->vc_num];
1506 struct fbcon_ops *ops = info->fbcon_par;
1507
1508 p->yscroll += count;
1509 if (p->yscroll > p->vrows - vc->vc_rows) {
1510 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1511 0, 0, 0, vc->vc_rows, vc->vc_cols);
1512 p->yscroll -= p->vrows - vc->vc_rows;
1513 }
1514
1515 ops->var.xoffset = 0;
1516 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1517 ops->var.vmode &= ~FB_VMODE_YWRAP;
1518 ops->update_start(info);
1519 fbcon_clear_margins(vc, 1);
1520 scrollback_max += count;
1521 if (scrollback_max > scrollback_phys_max)
1522 scrollback_max = scrollback_phys_max;
1523 scrollback_current = 0;
1524 }
1525
1526 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1527 {
1528 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1529 struct fbcon_ops *ops = info->fbcon_par;
1530 struct display *p = &fb_display[vc->vc_num];
1531
1532 p->yscroll += count;
1533
1534 if (p->yscroll > p->vrows - vc->vc_rows) {
1535 p->yscroll -= p->vrows - vc->vc_rows;
1536 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1537 }
1538
1539 ops->var.xoffset = 0;
1540 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1541 ops->var.vmode &= ~FB_VMODE_YWRAP;
1542 ops->update_start(info);
1543 fbcon_clear_margins(vc, 1);
1544 scrollback_max += count;
1545 if (scrollback_max > scrollback_phys_max)
1546 scrollback_max = scrollback_phys_max;
1547 scrollback_current = 0;
1548 }
1549
1550 static __inline__ void ypan_down(struct vc_data *vc, int count)
1551 {
1552 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1553 struct display *p = &fb_display[vc->vc_num];
1554 struct fbcon_ops *ops = info->fbcon_par;
1555
1556 p->yscroll -= count;
1557 if (p->yscroll < 0) {
1558 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1559 0, vc->vc_rows, vc->vc_cols);
1560 p->yscroll += p->vrows - vc->vc_rows;
1561 }
1562
1563 ops->var.xoffset = 0;
1564 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1565 ops->var.vmode &= ~FB_VMODE_YWRAP;
1566 ops->update_start(info);
1567 fbcon_clear_margins(vc, 1);
1568 scrollback_max -= count;
1569 if (scrollback_max < 0)
1570 scrollback_max = 0;
1571 scrollback_current = 0;
1572 }
1573
1574 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1575 {
1576 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1577 struct fbcon_ops *ops = info->fbcon_par;
1578 struct display *p = &fb_display[vc->vc_num];
1579
1580 p->yscroll -= count;
1581
1582 if (p->yscroll < 0) {
1583 p->yscroll += p->vrows - vc->vc_rows;
1584 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1585 }
1586
1587 ops->var.xoffset = 0;
1588 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1589 ops->var.vmode &= ~FB_VMODE_YWRAP;
1590 ops->update_start(info);
1591 fbcon_clear_margins(vc, 1);
1592 scrollback_max -= count;
1593 if (scrollback_max < 0)
1594 scrollback_max = 0;
1595 scrollback_current = 0;
1596 }
1597
1598 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1599 long delta)
1600 {
1601 int count = vc->vc_rows;
1602 unsigned short *d, *s;
1603 unsigned long n;
1604 int line = 0;
1605
1606 d = (u16 *) softback_curr;
1607 if (d == (u16 *) softback_in)
1608 d = (u16 *) vc->vc_origin;
1609 n = softback_curr + delta * vc->vc_size_row;
1610 softback_lines -= delta;
1611 if (delta < 0) {
1612 if (softback_curr < softback_top && n < softback_buf) {
1613 n += softback_end - softback_buf;
1614 if (n < softback_top) {
1615 softback_lines -=
1616 (softback_top - n) / vc->vc_size_row;
1617 n = softback_top;
1618 }
1619 } else if (softback_curr >= softback_top
1620 && n < softback_top) {
1621 softback_lines -=
1622 (softback_top - n) / vc->vc_size_row;
1623 n = softback_top;
1624 }
1625 } else {
1626 if (softback_curr > softback_in && n >= softback_end) {
1627 n += softback_buf - softback_end;
1628 if (n > softback_in) {
1629 n = softback_in;
1630 softback_lines = 0;
1631 }
1632 } else if (softback_curr <= softback_in && n > softback_in) {
1633 n = softback_in;
1634 softback_lines = 0;
1635 }
1636 }
1637 if (n == softback_curr)
1638 return;
1639 softback_curr = n;
1640 s = (u16 *) softback_curr;
1641 if (s == (u16 *) softback_in)
1642 s = (u16 *) vc->vc_origin;
1643 while (count--) {
1644 unsigned short *start;
1645 unsigned short *le;
1646 unsigned short c;
1647 int x = 0;
1648 unsigned short attr = 1;
1649
1650 start = s;
1651 le = advance_row(s, 1);
1652 do {
1653 c = scr_readw(s);
1654 if (attr != (c & 0xff00)) {
1655 attr = c & 0xff00;
1656 if (s > start) {
1657 fbcon_putcs(vc, start, s - start,
1658 line, x);
1659 x += s - start;
1660 start = s;
1661 }
1662 }
1663 if (c == scr_readw(d)) {
1664 if (s > start) {
1665 fbcon_putcs(vc, start, s - start,
1666 line, x);
1667 x += s - start + 1;
1668 start = s + 1;
1669 } else {
1670 x++;
1671 start++;
1672 }
1673 }
1674 s++;
1675 d++;
1676 } while (s < le);
1677 if (s > start)
1678 fbcon_putcs(vc, start, s - start, line, x);
1679 line++;
1680 if (d == (u16 *) softback_end)
1681 d = (u16 *) softback_buf;
1682 if (d == (u16 *) softback_in)
1683 d = (u16 *) vc->vc_origin;
1684 if (s == (u16 *) softback_end)
1685 s = (u16 *) softback_buf;
1686 if (s == (u16 *) softback_in)
1687 s = (u16 *) vc->vc_origin;
1688 }
1689 }
1690
1691 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1692 int line, int count, int dy)
1693 {
1694 unsigned short *s = (unsigned short *)
1695 (vc->vc_origin + vc->vc_size_row * line);
1696
1697 while (count--) {
1698 unsigned short *start = s;
1699 unsigned short *le = advance_row(s, 1);
1700 unsigned short c;
1701 int x = 0;
1702 unsigned short attr = 1;
1703
1704 do {
1705 c = scr_readw(s);
1706 if (attr != (c & 0xff00)) {
1707 attr = c & 0xff00;
1708 if (s > start) {
1709 fbcon_putcs(vc, start, s - start,
1710 dy, x);
1711 x += s - start;
1712 start = s;
1713 }
1714 }
1715 console_conditional_schedule();
1716 s++;
1717 } while (s < le);
1718 if (s > start)
1719 fbcon_putcs(vc, start, s - start, dy, x);
1720 console_conditional_schedule();
1721 dy++;
1722 }
1723 }
1724
1725 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1726 struct display *p, int line, int count, int ycount)
1727 {
1728 int offset = ycount * vc->vc_cols;
1729 unsigned short *d = (unsigned short *)
1730 (vc->vc_origin + vc->vc_size_row * line);
1731 unsigned short *s = d + offset;
1732 struct fbcon_ops *ops = info->fbcon_par;
1733
1734 while (count--) {
1735 unsigned short *start = s;
1736 unsigned short *le = advance_row(s, 1);
1737 unsigned short c;
1738 int x = 0;
1739
1740 do {
1741 c = scr_readw(s);
1742
1743 if (c == scr_readw(d)) {
1744 if (s > start) {
1745 ops->bmove(vc, info, line + ycount, x,
1746 line, x, 1, s-start);
1747 x += s - start + 1;
1748 start = s + 1;
1749 } else {
1750 x++;
1751 start++;
1752 }
1753 }
1754
1755 scr_writew(c, d);
1756 console_conditional_schedule();
1757 s++;
1758 d++;
1759 } while (s < le);
1760 if (s > start)
1761 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1762 s-start);
1763 console_conditional_schedule();
1764 if (ycount > 0)
1765 line++;
1766 else {
1767 line--;
1768 /* NOTE: We subtract two lines from these pointers */
1769 s -= vc->vc_size_row;
1770 d -= vc->vc_size_row;
1771 }
1772 }
1773 }
1774
1775 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1776 int line, int count, int offset)
1777 {
1778 unsigned short *d = (unsigned short *)
1779 (vc->vc_origin + vc->vc_size_row * line);
1780 unsigned short *s = d + offset;
1781
1782 while (count--) {
1783 unsigned short *start = s;
1784 unsigned short *le = advance_row(s, 1);
1785 unsigned short c;
1786 int x = 0;
1787 unsigned short attr = 1;
1788
1789 do {
1790 c = scr_readw(s);
1791 if (attr != (c & 0xff00)) {
1792 attr = c & 0xff00;
1793 if (s > start) {
1794 fbcon_putcs(vc, start, s - start,
1795 line, x);
1796 x += s - start;
1797 start = s;
1798 }
1799 }
1800 if (c == scr_readw(d)) {
1801 if (s > start) {
1802 fbcon_putcs(vc, start, s - start,
1803 line, x);
1804 x += s - start + 1;
1805 start = s + 1;
1806 } else {
1807 x++;
1808 start++;
1809 }
1810 }
1811 scr_writew(c, d);
1812 console_conditional_schedule();
1813 s++;
1814 d++;
1815 } while (s < le);
1816 if (s > start)
1817 fbcon_putcs(vc, start, s - start, line, x);
1818 console_conditional_schedule();
1819 if (offset > 0)
1820 line++;
1821 else {
1822 line--;
1823 /* NOTE: We subtract two lines from these pointers */
1824 s -= vc->vc_size_row;
1825 d -= vc->vc_size_row;
1826 }
1827 }
1828 }
1829
1830 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1831 int count)
1832 {
1833 unsigned short *p;
1834
1835 if (vc->vc_num != fg_console)
1836 return;
1837 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1838
1839 while (count) {
1840 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1841 count--;
1842 p = advance_row(p, 1);
1843 softback_in += vc->vc_size_row;
1844 if (softback_in == softback_end)
1845 softback_in = softback_buf;
1846 if (softback_in == softback_top) {
1847 softback_top += vc->vc_size_row;
1848 if (softback_top == softback_end)
1849 softback_top = softback_buf;
1850 }
1851 }
1852 softback_curr = softback_in;
1853 }
1854
1855 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1856 int count)
1857 {
1858 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1859 struct display *p = &fb_display[vc->vc_num];
1860 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1861
1862 if (fbcon_is_inactive(vc, info))
1863 return -EINVAL;
1864
1865 fbcon_cursor(vc, CM_ERASE);
1866
1867 /*
1868 * ++Geert: Only use ywrap/ypan if the console is in text mode
1869 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1870 * whole screen (prevents flicker).
1871 */
1872
1873 switch (dir) {
1874 case SM_UP:
1875 if (count > vc->vc_rows) /* Maximum realistic size */
1876 count = vc->vc_rows;
1877 if (softback_top)
1878 fbcon_softback_note(vc, t, count);
1879 if (logo_shown >= 0)
1880 goto redraw_up;
1881 switch (p->scrollmode) {
1882 case SCROLL_MOVE:
1883 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1884 count);
1885 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1886 scr_memsetw((unsigned short *) (vc->vc_origin +
1887 vc->vc_size_row *
1888 (b - count)),
1889 vc->vc_video_erase_char,
1890 vc->vc_size_row * count);
1891 return 1;
1892 break;
1893
1894 case SCROLL_WRAP_MOVE:
1895 if (b - t - count > 3 * vc->vc_rows >> 2) {
1896 if (t > 0)
1897 fbcon_bmove(vc, 0, 0, count, 0, t,
1898 vc->vc_cols);
1899 ywrap_up(vc, count);
1900 if (vc->vc_rows - b > 0)
1901 fbcon_bmove(vc, b - count, 0, b, 0,
1902 vc->vc_rows - b,
1903 vc->vc_cols);
1904 } else if (info->flags & FBINFO_READS_FAST)
1905 fbcon_bmove(vc, t + count, 0, t, 0,
1906 b - t - count, vc->vc_cols);
1907 else
1908 goto redraw_up;
1909 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1910 break;
1911
1912 case SCROLL_PAN_REDRAW:
1913 if ((p->yscroll + count <=
1914 2 * (p->vrows - vc->vc_rows))
1915 && ((!scroll_partial && (b - t == vc->vc_rows))
1916 || (scroll_partial
1917 && (b - t - count >
1918 3 * vc->vc_rows >> 2)))) {
1919 if (t > 0)
1920 fbcon_redraw_move(vc, p, 0, t, count);
1921 ypan_up_redraw(vc, t, count);
1922 if (vc->vc_rows - b > 0)
1923 fbcon_redraw_move(vc, p, b,
1924 vc->vc_rows - b, b);
1925 } else
1926 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1927 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1928 break;
1929
1930 case SCROLL_PAN_MOVE:
1931 if ((p->yscroll + count <=
1932 2 * (p->vrows - vc->vc_rows))
1933 && ((!scroll_partial && (b - t == vc->vc_rows))
1934 || (scroll_partial
1935 && (b - t - count >
1936 3 * vc->vc_rows >> 2)))) {
1937 if (t > 0)
1938 fbcon_bmove(vc, 0, 0, count, 0, t,
1939 vc->vc_cols);
1940 ypan_up(vc, count);
1941 if (vc->vc_rows - b > 0)
1942 fbcon_bmove(vc, b - count, 0, b, 0,
1943 vc->vc_rows - b,
1944 vc->vc_cols);
1945 } else if (info->flags & FBINFO_READS_FAST)
1946 fbcon_bmove(vc, t + count, 0, t, 0,
1947 b - t - count, vc->vc_cols);
1948 else
1949 goto redraw_up;
1950 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1951 break;
1952
1953 case SCROLL_REDRAW:
1954 redraw_up:
1955 fbcon_redraw(vc, p, t, b - t - count,
1956 count * vc->vc_cols);
1957 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1958 scr_memsetw((unsigned short *) (vc->vc_origin +
1959 vc->vc_size_row *
1960 (b - count)),
1961 vc->vc_video_erase_char,
1962 vc->vc_size_row * count);
1963 return 1;
1964 }
1965 break;
1966
1967 case SM_DOWN:
1968 if (count > vc->vc_rows) /* Maximum realistic size */
1969 count = vc->vc_rows;
1970 if (logo_shown >= 0)
1971 goto redraw_down;
1972 switch (p->scrollmode) {
1973 case SCROLL_MOVE:
1974 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1975 -count);
1976 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1977 scr_memsetw((unsigned short *) (vc->vc_origin +
1978 vc->vc_size_row *
1979 t),
1980 vc->vc_video_erase_char,
1981 vc->vc_size_row * count);
1982 return 1;
1983 break;
1984
1985 case SCROLL_WRAP_MOVE:
1986 if (b - t - count > 3 * vc->vc_rows >> 2) {
1987 if (vc->vc_rows - b > 0)
1988 fbcon_bmove(vc, b, 0, b - count, 0,
1989 vc->vc_rows - b,
1990 vc->vc_cols);
1991 ywrap_down(vc, count);
1992 if (t > 0)
1993 fbcon_bmove(vc, count, 0, 0, 0, t,
1994 vc->vc_cols);
1995 } else if (info->flags & FBINFO_READS_FAST)
1996 fbcon_bmove(vc, t, 0, t + count, 0,
1997 b - t - count, vc->vc_cols);
1998 else
1999 goto redraw_down;
2000 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2001 break;
2002
2003 case SCROLL_PAN_MOVE:
2004 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2005 && ((!scroll_partial && (b - t == vc->vc_rows))
2006 || (scroll_partial
2007 && (b - t - count >
2008 3 * vc->vc_rows >> 2)))) {
2009 if (vc->vc_rows - b > 0)
2010 fbcon_bmove(vc, b, 0, b - count, 0,
2011 vc->vc_rows - b,
2012 vc->vc_cols);
2013 ypan_down(vc, count);
2014 if (t > 0)
2015 fbcon_bmove(vc, count, 0, 0, 0, t,
2016 vc->vc_cols);
2017 } else if (info->flags & FBINFO_READS_FAST)
2018 fbcon_bmove(vc, t, 0, t + count, 0,
2019 b - t - count, vc->vc_cols);
2020 else
2021 goto redraw_down;
2022 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2023 break;
2024
2025 case SCROLL_PAN_REDRAW:
2026 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2027 && ((!scroll_partial && (b - t == vc->vc_rows))
2028 || (scroll_partial
2029 && (b - t - count >
2030 3 * vc->vc_rows >> 2)))) {
2031 if (vc->vc_rows - b > 0)
2032 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2033 b - count);
2034 ypan_down_redraw(vc, t, count);
2035 if (t > 0)
2036 fbcon_redraw_move(vc, p, count, t, 0);
2037 } else
2038 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2039 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2040 break;
2041
2042 case SCROLL_REDRAW:
2043 redraw_down:
2044 fbcon_redraw(vc, p, b - 1, b - t - count,
2045 -count * vc->vc_cols);
2046 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2047 scr_memsetw((unsigned short *) (vc->vc_origin +
2048 vc->vc_size_row *
2049 t),
2050 vc->vc_video_erase_char,
2051 vc->vc_size_row * count);
2052 return 1;
2053 }
2054 }
2055 return 0;
2056 }
2057
2058
2059 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2060 int height, int width)
2061 {
2062 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2063 struct display *p = &fb_display[vc->vc_num];
2064
2065 if (fbcon_is_inactive(vc, info))
2066 return;
2067
2068 if (!width || !height)
2069 return;
2070
2071 /* Split blits that cross physical y_wrap case.
2072 * Pathological case involves 4 blits, better to use recursive
2073 * code rather than unrolled case
2074 *
2075 * Recursive invocations don't need to erase the cursor over and
2076 * over again, so we use fbcon_bmove_rec()
2077 */
2078 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2079 p->vrows - p->yscroll);
2080 }
2081
2082 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2083 int dy, int dx, int height, int width, u_int y_break)
2084 {
2085 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2086 struct fbcon_ops *ops = info->fbcon_par;
2087 u_int b;
2088
2089 if (sy < y_break && sy + height > y_break) {
2090 b = y_break - sy;
2091 if (dy < sy) { /* Avoid trashing self */
2092 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2093 y_break);
2094 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2095 height - b, width, y_break);
2096 } else {
2097 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2098 height - b, width, y_break);
2099 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2100 y_break);
2101 }
2102 return;
2103 }
2104
2105 if (dy < y_break && dy + height > y_break) {
2106 b = y_break - dy;
2107 if (dy < sy) { /* Avoid trashing self */
2108 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2109 y_break);
2110 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2111 height - b, width, y_break);
2112 } else {
2113 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2114 height - b, width, y_break);
2115 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2116 y_break);
2117 }
2118 return;
2119 }
2120 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2121 height, width);
2122 }
2123
2124 static __inline__ void updatescrollmode(struct display *p,
2125 struct fb_info *info,
2126 struct vc_data *vc)
2127 {
2128 struct fbcon_ops *ops = info->fbcon_par;
2129 int fh = vc->vc_font.height;
2130 int cap = info->flags;
2131 u16 t = 0;
2132 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2133 info->fix.xpanstep);
2134 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2135 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2136 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2137 info->var.xres_virtual);
2138 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2139 divides(ypan, vc->vc_font.height) && vyres > yres;
2140 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2141 divides(ywrap, vc->vc_font.height) &&
2142 divides(vc->vc_font.height, vyres) &&
2143 divides(vc->vc_font.height, yres);
2144 int reading_fast = cap & FBINFO_READS_FAST;
2145 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2146 !(cap & FBINFO_HWACCEL_DISABLED);
2147 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2148 !(cap & FBINFO_HWACCEL_DISABLED);
2149
2150 p->vrows = vyres/fh;
2151 if (yres > (fh * (vc->vc_rows + 1)))
2152 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2153 if ((yres % fh) && (vyres % fh < yres % fh))
2154 p->vrows--;
2155
2156 if (good_wrap || good_pan) {
2157 if (reading_fast || fast_copyarea)
2158 p->scrollmode = good_wrap ?
2159 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2160 else
2161 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2162 SCROLL_PAN_REDRAW;
2163 } else {
2164 if (reading_fast || (fast_copyarea && !fast_imageblit))
2165 p->scrollmode = SCROLL_MOVE;
2166 else
2167 p->scrollmode = SCROLL_REDRAW;
2168 }
2169 }
2170
2171 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2172 unsigned int height)
2173 {
2174 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2175 struct fbcon_ops *ops = info->fbcon_par;
2176 struct display *p = &fb_display[vc->vc_num];
2177 struct fb_var_screeninfo var = info->var;
2178 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2179
2180 virt_w = FBCON_SWAP(ops->rotate, width, height);
2181 virt_h = FBCON_SWAP(ops->rotate, height, width);
2182 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2183 vc->vc_font.height);
2184 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2185 vc->vc_font.width);
2186 var.xres = virt_w * virt_fw;
2187 var.yres = virt_h * virt_fh;
2188 x_diff = info->var.xres - var.xres;
2189 y_diff = info->var.yres - var.yres;
2190 if (x_diff < 0 || x_diff > virt_fw ||
2191 y_diff < 0 || y_diff > virt_fh) {
2192 const struct fb_videomode *mode;
2193
2194 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2195 mode = fb_find_best_mode(&var, &info->modelist);
2196 if (mode == NULL)
2197 return -EINVAL;
2198 display_to_var(&var, p);
2199 fb_videomode_to_var(&var, mode);
2200
2201 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2202 return -EINVAL;
2203
2204 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2205 if (CON_IS_VISIBLE(vc)) {
2206 var.activate = FB_ACTIVATE_NOW |
2207 FB_ACTIVATE_FORCE;
2208 fb_set_var(info, &var);
2209 }
2210 var_to_display(p, &info->var, info);
2211 ops->var = info->var;
2212 }
2213 updatescrollmode(p, info, vc);
2214 return 0;
2215 }
2216
2217 static int fbcon_switch(struct vc_data *vc)
2218 {
2219 struct fb_info *info, *old_info = NULL;
2220 struct fbcon_ops *ops;
2221 struct display *p = &fb_display[vc->vc_num];
2222 struct fb_var_screeninfo var;
2223 int i, prev_console, charcnt = 256;
2224
2225 info = registered_fb[con2fb_map[vc->vc_num]];
2226 ops = info->fbcon_par;
2227
2228 if (softback_top) {
2229 if (softback_lines)
2230 fbcon_set_origin(vc);
2231 softback_top = softback_curr = softback_in = softback_buf;
2232 softback_lines = 0;
2233 fbcon_update_softback(vc);
2234 }
2235
2236 if (logo_shown >= 0) {
2237 struct vc_data *conp2 = vc_cons[logo_shown].d;
2238
2239 if (conp2->vc_top == logo_lines
2240 && conp2->vc_bottom == conp2->vc_rows)
2241 conp2->vc_top = 0;
2242 logo_shown = FBCON_LOGO_CANSHOW;
2243 }
2244
2245 prev_console = ops->currcon;
2246 if (prev_console != -1)
2247 old_info = registered_fb[con2fb_map[prev_console]];
2248 /*
2249 * FIXME: If we have multiple fbdev's loaded, we need to
2250 * update all info->currcon. Perhaps, we can place this
2251 * in a centralized structure, but this might break some
2252 * drivers.
2253 *
2254 * info->currcon = vc->vc_num;
2255 */
2256 for (i = 0; i < FB_MAX; i++) {
2257 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2258 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2259
2260 o->currcon = vc->vc_num;
2261 }
2262 }
2263 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2264 display_to_var(&var, p);
2265 var.activate = FB_ACTIVATE_NOW;
2266
2267 /*
2268 * make sure we don't unnecessarily trip the memcmp()
2269 * in fb_set_var()
2270 */
2271 info->var.activate = var.activate;
2272 var.yoffset = info->var.yoffset;
2273 var.xoffset = info->var.xoffset;
2274 var.vmode = info->var.vmode;
2275 fb_set_var(info, &var);
2276 ops->var = info->var;
2277
2278 if (old_info != NULL && (old_info != info ||
2279 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2280 if (info->fbops->fb_set_par)
2281 info->fbops->fb_set_par(info);
2282
2283 if (old_info != info)
2284 fbcon_del_cursor_timer(old_info);
2285 }
2286
2287 if (fbcon_is_inactive(vc, info) ||
2288 ops->blank_state != FB_BLANK_UNBLANK)
2289 fbcon_del_cursor_timer(info);
2290 else
2291 fbcon_add_cursor_timer(info);
2292
2293 set_blitting_type(vc, info);
2294 ops->cursor_reset = 1;
2295
2296 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2297 ops->rotate = FB_ROTATE_UR;
2298 set_blitting_type(vc, info);
2299 }
2300
2301 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2302 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2303
2304 if (p->userfont)
2305 charcnt = FNTCHARCNT(vc->vc_font.data);
2306
2307 if (charcnt > 256)
2308 vc->vc_complement_mask <<= 1;
2309
2310 updatescrollmode(p, info, vc);
2311
2312 switch (p->scrollmode) {
2313 case SCROLL_WRAP_MOVE:
2314 scrollback_phys_max = p->vrows - vc->vc_rows;
2315 break;
2316 case SCROLL_PAN_MOVE:
2317 case SCROLL_PAN_REDRAW:
2318 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2319 if (scrollback_phys_max < 0)
2320 scrollback_phys_max = 0;
2321 break;
2322 default:
2323 scrollback_phys_max = 0;
2324 break;
2325 }
2326
2327 scrollback_max = 0;
2328 scrollback_current = 0;
2329
2330 if (!fbcon_is_inactive(vc, info)) {
2331 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2332 ops->update_start(info);
2333 }
2334
2335 fbcon_set_palette(vc, color_table);
2336 fbcon_clear_margins(vc, 0);
2337
2338 if (logo_shown == FBCON_LOGO_DRAW) {
2339
2340 logo_shown = fg_console;
2341 /* This is protected above by initmem_freed */
2342 fb_show_logo(info, ops->rotate);
2343 update_region(vc,
2344 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2345 vc->vc_size_row * (vc->vc_bottom -
2346 vc->vc_top) / 2);
2347 return 0;
2348 }
2349 return 1;
2350 }
2351
2352 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2353 int blank)
2354 {
2355 struct fb_event event;
2356
2357 if (blank) {
2358 unsigned short charmask = vc->vc_hi_font_mask ?
2359 0x1ff : 0xff;
2360 unsigned short oldc;
2361
2362 oldc = vc->vc_video_erase_char;
2363 vc->vc_video_erase_char &= charmask;
2364 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2365 vc->vc_video_erase_char = oldc;
2366 }
2367
2368
2369 event.info = info;
2370 event.data = &blank;
2371 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2372 }
2373
2374 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2375 {
2376 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2377 struct fbcon_ops *ops = info->fbcon_par;
2378
2379 if (mode_switch) {
2380 struct fb_var_screeninfo var = info->var;
2381
2382 ops->graphics = 1;
2383
2384 if (!blank) {
2385 if (info->fbops->fb_save_state)
2386 info->fbops->fb_save_state(info);
2387 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2388 fb_set_var(info, &var);
2389 ops->graphics = 0;
2390 ops->var = info->var;
2391 } else if (info->fbops->fb_restore_state)
2392 info->fbops->fb_restore_state(info);
2393 }
2394
2395 if (!fbcon_is_inactive(vc, info)) {
2396 if (ops->blank_state != blank) {
2397 ops->blank_state = blank;
2398 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2399 ops->cursor_flash = (!blank);
2400
2401 if (fb_blank(info, blank))
2402 fbcon_generic_blank(vc, info, blank);
2403 }
2404
2405 if (!blank)
2406 update_screen(vc);
2407 }
2408
2409 if (fbcon_is_inactive(vc, info) ||
2410 ops->blank_state != FB_BLANK_UNBLANK)
2411 fbcon_del_cursor_timer(info);
2412 else
2413 fbcon_add_cursor_timer(info);
2414
2415 return 0;
2416 }
2417
2418 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2419 {
2420 u8 *fontdata = vc->vc_font.data;
2421 u8 *data = font->data;
2422 int i, j;
2423
2424 font->width = vc->vc_font.width;
2425 font->height = vc->vc_font.height;
2426 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2427 if (!font->data)
2428 return 0;
2429
2430 if (font->width <= 8) {
2431 j = vc->vc_font.height;
2432 for (i = 0; i < font->charcount; i++) {
2433 memcpy(data, fontdata, j);
2434 memset(data + j, 0, 32 - j);
2435 data += 32;
2436 fontdata += j;
2437 }
2438 } else if (font->width <= 16) {
2439 j = vc->vc_font.height * 2;
2440 for (i = 0; i < font->charcount; i++) {
2441 memcpy(data, fontdata, j);
2442 memset(data + j, 0, 64 - j);
2443 data += 64;
2444 fontdata += j;
2445 }
2446 } else if (font->width <= 24) {
2447 for (i = 0; i < font->charcount; i++) {
2448 for (j = 0; j < vc->vc_font.height; j++) {
2449 *data++ = fontdata[0];
2450 *data++ = fontdata[1];
2451 *data++ = fontdata[2];
2452 fontdata += sizeof(u32);
2453 }
2454 memset(data, 0, 3 * (32 - j));
2455 data += 3 * (32 - j);
2456 }
2457 } else {
2458 j = vc->vc_font.height * 4;
2459 for (i = 0; i < font->charcount; i++) {
2460 memcpy(data, fontdata, j);
2461 memset(data + j, 0, 128 - j);
2462 data += 128;
2463 fontdata += j;
2464 }
2465 }
2466 return 0;
2467 }
2468
2469 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2470 const u8 * data, int userfont)
2471 {
2472 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2473 struct fbcon_ops *ops = info->fbcon_par;
2474 struct display *p = &fb_display[vc->vc_num];
2475 int resize;
2476 int cnt;
2477 char *old_data = NULL;
2478
2479 if (CON_IS_VISIBLE(vc) && softback_lines)
2480 fbcon_set_origin(vc);
2481
2482 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2483 if (p->userfont)
2484 old_data = vc->vc_font.data;
2485 if (userfont)
2486 cnt = FNTCHARCNT(data);
2487 else
2488 cnt = 256;
2489 vc->vc_font.data = (void *)(p->fontdata = data);
2490 if ((p->userfont = userfont))
2491 REFCOUNT(data)++;
2492 vc->vc_font.width = w;
2493 vc->vc_font.height = h;
2494 if (vc->vc_hi_font_mask && cnt == 256) {
2495 vc->vc_hi_font_mask = 0;
2496 if (vc->vc_can_do_color) {
2497 vc->vc_complement_mask >>= 1;
2498 vc->vc_s_complement_mask >>= 1;
2499 }
2500
2501 /* ++Edmund: reorder the attribute bits */
2502 if (vc->vc_can_do_color) {
2503 unsigned short *cp =
2504 (unsigned short *) vc->vc_origin;
2505 int count = vc->vc_screenbuf_size / 2;
2506 unsigned short c;
2507 for (; count > 0; count--, cp++) {
2508 c = scr_readw(cp);
2509 scr_writew(((c & 0xfe00) >> 1) |
2510 (c & 0xff), cp);
2511 }
2512 c = vc->vc_video_erase_char;
2513 vc->vc_video_erase_char =
2514 ((c & 0xfe00) >> 1) | (c & 0xff);
2515 vc->vc_attr >>= 1;
2516 }
2517 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2518 vc->vc_hi_font_mask = 0x100;
2519 if (vc->vc_can_do_color) {
2520 vc->vc_complement_mask <<= 1;
2521 vc->vc_s_complement_mask <<= 1;
2522 }
2523
2524 /* ++Edmund: reorder the attribute bits */
2525 {
2526 unsigned short *cp =
2527 (unsigned short *) vc->vc_origin;
2528 int count = vc->vc_screenbuf_size / 2;
2529 unsigned short c;
2530 for (; count > 0; count--, cp++) {
2531 unsigned short newc;
2532 c = scr_readw(cp);
2533 if (vc->vc_can_do_color)
2534 newc =
2535 ((c & 0xff00) << 1) | (c &
2536 0xff);
2537 else
2538 newc = c & ~0x100;
2539 scr_writew(newc, cp);
2540 }
2541 c = vc->vc_video_erase_char;
2542 if (vc->vc_can_do_color) {
2543 vc->vc_video_erase_char =
2544 ((c & 0xff00) << 1) | (c & 0xff);
2545 vc->vc_attr <<= 1;
2546 } else
2547 vc->vc_video_erase_char = c & ~0x100;
2548 }
2549
2550 }
2551
2552 if (resize) {
2553 int cols, rows;
2554
2555 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2556 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2557 cols /= w;
2558 rows /= h;
2559 vc_resize(vc, cols, rows);
2560 if (CON_IS_VISIBLE(vc) && softback_buf)
2561 fbcon_update_softback(vc);
2562 } else if (CON_IS_VISIBLE(vc)
2563 && vc->vc_mode == KD_TEXT) {
2564 fbcon_clear_margins(vc, 0);
2565 update_screen(vc);
2566 }
2567
2568 if (old_data && (--REFCOUNT(old_data) == 0))
2569 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2570 return 0;
2571 }
2572
2573 static int fbcon_copy_font(struct vc_data *vc, int con)
2574 {
2575 struct display *od = &fb_display[con];
2576 struct console_font *f = &vc->vc_font;
2577
2578 if (od->fontdata == f->data)
2579 return 0; /* already the same font... */
2580 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2581 }
2582
2583 /*
2584 * User asked to set font; we are guaranteed that
2585 * a) width and height are in range 1..32
2586 * b) charcount does not exceed 512
2587 * but lets not assume that, since someone might someday want to use larger
2588 * fonts. And charcount of 512 is small for unicode support.
2589 *
2590 * However, user space gives the font in 32 rows , regardless of
2591 * actual font height. So a new API is needed if support for larger fonts
2592 * is ever implemented.
2593 */
2594
2595 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2596 {
2597 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2598 unsigned charcount = font->charcount;
2599 int w = font->width;
2600 int h = font->height;
2601 int size;
2602 int i, csum;
2603 u8 *new_data, *data = font->data;
2604 int pitch = (font->width+7) >> 3;
2605
2606 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2607 * If not this check should be changed to charcount < 256 */
2608 if (charcount != 256 && charcount != 512)
2609 return -EINVAL;
2610
2611 /* Make sure drawing engine can handle the font */
2612 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2613 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2614 return -EINVAL;
2615
2616 /* Make sure driver can handle the font length */
2617 if (fbcon_invalid_charcount(info, charcount))
2618 return -EINVAL;
2619
2620 size = h * pitch * charcount;
2621
2622 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2623
2624 if (!new_data)
2625 return -ENOMEM;
2626
2627 new_data += FONT_EXTRA_WORDS * sizeof(int);
2628 FNTSIZE(new_data) = size;
2629 FNTCHARCNT(new_data) = charcount;
2630 REFCOUNT(new_data) = 0; /* usage counter */
2631 for (i=0; i< charcount; i++) {
2632 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2633 }
2634
2635 /* Since linux has a nice crc32 function use it for counting font
2636 * checksums. */
2637 csum = crc32(0, new_data, size);
2638
2639 FNTSUM(new_data) = csum;
2640 /* Check if the same font is on some other console already */
2641 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2642 struct vc_data *tmp = vc_cons[i].d;
2643
2644 if (fb_display[i].userfont &&
2645 fb_display[i].fontdata &&
2646 FNTSUM(fb_display[i].fontdata) == csum &&
2647 FNTSIZE(fb_display[i].fontdata) == size &&
2648 tmp->vc_font.width == w &&
2649 !memcmp(fb_display[i].fontdata, new_data, size)) {
2650 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2651 new_data = (u8 *)fb_display[i].fontdata;
2652 break;
2653 }
2654 }
2655 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2656 }
2657
2658 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2659 {
2660 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2661 const struct font_desc *f;
2662
2663 if (!name)
2664 f = get_default_font(info->var.xres, info->var.yres,
2665 info->pixmap.blit_x, info->pixmap.blit_y);
2666 else if (!(f = find_font(name)))
2667 return -ENOENT;
2668
2669 font->width = f->width;
2670 font->height = f->height;
2671 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2672 }
2673
2674 static u16 palette_red[16];
2675 static u16 palette_green[16];
2676 static u16 palette_blue[16];
2677
2678 static struct fb_cmap palette_cmap = {
2679 0, 16, palette_red, palette_green, palette_blue, NULL
2680 };
2681
2682 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2683 {
2684 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2685 int i, j, k, depth;
2686 u8 val;
2687
2688 if (fbcon_is_inactive(vc, info))
2689 return -EINVAL;
2690
2691 if (!CON_IS_VISIBLE(vc))
2692 return 0;
2693
2694 depth = fb_get_color_depth(&info->var, &info->fix);
2695 if (depth > 3) {
2696 for (i = j = 0; i < 16; i++) {
2697 k = table[i];
2698 val = vc->vc_palette[j++];
2699 palette_red[k] = (val << 8) | val;
2700 val = vc->vc_palette[j++];
2701 palette_green[k] = (val << 8) | val;
2702 val = vc->vc_palette[j++];
2703 palette_blue[k] = (val << 8) | val;
2704 }
2705 palette_cmap.len = 16;
2706 palette_cmap.start = 0;
2707 /*
2708 * If framebuffer is capable of less than 16 colors,
2709 * use default palette of fbcon.
2710 */
2711 } else
2712 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2713
2714 return fb_set_cmap(&palette_cmap, info);
2715 }
2716
2717 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2718 {
2719 unsigned long p;
2720 int line;
2721
2722 if (vc->vc_num != fg_console || !softback_lines)
2723 return (u16 *) (vc->vc_origin + offset);
2724 line = offset / vc->vc_size_row;
2725 if (line >= softback_lines)
2726 return (u16 *) (vc->vc_origin + offset -
2727 softback_lines * vc->vc_size_row);
2728 p = softback_curr + offset;
2729 if (p >= softback_end)
2730 p += softback_buf - softback_end;
2731 return (u16 *) p;
2732 }
2733
2734 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2735 int *px, int *py)
2736 {
2737 unsigned long ret;
2738 int x, y;
2739
2740 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2741 unsigned long offset = (pos - vc->vc_origin) / 2;
2742
2743 x = offset % vc->vc_cols;
2744 y = offset / vc->vc_cols;
2745 if (vc->vc_num == fg_console)
2746 y += softback_lines;
2747 ret = pos + (vc->vc_cols - x) * 2;
2748 } else if (vc->vc_num == fg_console && softback_lines) {
2749 unsigned long offset = pos - softback_curr;
2750
2751 if (pos < softback_curr)
2752 offset += softback_end - softback_buf;
2753 offset /= 2;
2754 x = offset % vc->vc_cols;
2755 y = offset / vc->vc_cols;
2756 ret = pos + (vc->vc_cols - x) * 2;
2757 if (ret == softback_end)
2758 ret = softback_buf;
2759 if (ret == softback_in)
2760 ret = vc->vc_origin;
2761 } else {
2762 /* Should not happen */
2763 x = y = 0;
2764 ret = vc->vc_origin;
2765 }
2766 if (px)
2767 *px = x;
2768 if (py)
2769 *py = y;
2770 return ret;
2771 }
2772
2773 /* As we might be inside of softback, we may work with non-contiguous buffer,
2774 that's why we have to use a separate routine. */
2775 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2776 {
2777 while (cnt--) {
2778 u16 a = scr_readw(p);
2779 if (!vc->vc_can_do_color)
2780 a ^= 0x0800;
2781 else if (vc->vc_hi_font_mask == 0x100)
2782 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2783 (((a) & 0x0e00) << 4);
2784 else
2785 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2786 (((a) & 0x0700) << 4);
2787 scr_writew(a, p++);
2788 if (p == (u16 *) softback_end)
2789 p = (u16 *) softback_buf;
2790 if (p == (u16 *) softback_in)
2791 p = (u16 *) vc->vc_origin;
2792 }
2793 }
2794
2795 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2796 {
2797 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2798 struct fbcon_ops *ops = info->fbcon_par;
2799 struct display *p = &fb_display[fg_console];
2800 int offset, limit, scrollback_old;
2801
2802 if (softback_top) {
2803 if (vc->vc_num != fg_console)
2804 return 0;
2805 if (vc->vc_mode != KD_TEXT || !lines)
2806 return 0;
2807 if (logo_shown >= 0) {
2808 struct vc_data *conp2 = vc_cons[logo_shown].d;
2809
2810 if (conp2->vc_top == logo_lines
2811 && conp2->vc_bottom == conp2->vc_rows)
2812 conp2->vc_top = 0;
2813 if (logo_shown == vc->vc_num) {
2814 unsigned long p, q;
2815 int i;
2816
2817 p = softback_in;
2818 q = vc->vc_origin +
2819 logo_lines * vc->vc_size_row;
2820 for (i = 0; i < logo_lines; i++) {
2821 if (p == softback_top)
2822 break;
2823 if (p == softback_buf)
2824 p = softback_end;
2825 p -= vc->vc_size_row;
2826 q -= vc->vc_size_row;
2827 scr_memcpyw((u16 *) q, (u16 *) p,
2828 vc->vc_size_row);
2829 }
2830 softback_in = softback_curr = p;
2831 update_region(vc, vc->vc_origin,
2832 logo_lines * vc->vc_cols);
2833 }
2834 logo_shown = FBCON_LOGO_CANSHOW;
2835 }
2836 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2837 fbcon_redraw_softback(vc, p, lines);
2838 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2839 return 0;
2840 }
2841
2842 if (!scrollback_phys_max)
2843 return -ENOSYS;
2844
2845 scrollback_old = scrollback_current;
2846 scrollback_current -= lines;
2847 if (scrollback_current < 0)
2848 scrollback_current = 0;
2849 else if (scrollback_current > scrollback_max)
2850 scrollback_current = scrollback_max;
2851 if (scrollback_current == scrollback_old)
2852 return 0;
2853
2854 if (fbcon_is_inactive(vc, info))
2855 return 0;
2856
2857 fbcon_cursor(vc, CM_ERASE);
2858
2859 offset = p->yscroll - scrollback_current;
2860 limit = p->vrows;
2861 switch (p->scrollmode) {
2862 case SCROLL_WRAP_MOVE:
2863 info->var.vmode |= FB_VMODE_YWRAP;
2864 break;
2865 case SCROLL_PAN_MOVE:
2866 case SCROLL_PAN_REDRAW:
2867 limit -= vc->vc_rows;
2868 info->var.vmode &= ~FB_VMODE_YWRAP;
2869 break;
2870 }
2871 if (offset < 0)
2872 offset += limit;
2873 else if (offset >= limit)
2874 offset -= limit;
2875
2876 ops->var.xoffset = 0;
2877 ops->var.yoffset = offset * vc->vc_font.height;
2878 ops->update_start(info);
2879
2880 if (!scrollback_current)
2881 fbcon_cursor(vc, CM_DRAW);
2882 return 0;
2883 }
2884
2885 static int fbcon_set_origin(struct vc_data *vc)
2886 {
2887 if (softback_lines)
2888 fbcon_scrolldelta(vc, softback_lines);
2889 return 0;
2890 }
2891
2892 static void fbcon_suspended(struct fb_info *info)
2893 {
2894 struct vc_data *vc = NULL;
2895 struct fbcon_ops *ops = info->fbcon_par;
2896
2897 if (!ops || ops->currcon < 0)
2898 return;
2899 vc = vc_cons[ops->currcon].d;
2900
2901 /* Clear cursor, restore saved data */
2902 fbcon_cursor(vc, CM_ERASE);
2903 }
2904
2905 static void fbcon_resumed(struct fb_info *info)
2906 {
2907 struct vc_data *vc;
2908 struct fbcon_ops *ops = info->fbcon_par;
2909
2910 if (!ops || ops->currcon < 0)
2911 return;
2912 vc = vc_cons[ops->currcon].d;
2913
2914 update_screen(vc);
2915 }
2916
2917 static void fbcon_modechanged(struct fb_info *info)
2918 {
2919 struct fbcon_ops *ops = info->fbcon_par;
2920 struct vc_data *vc;
2921 struct display *p;
2922 int rows, cols;
2923
2924 if (!ops || ops->currcon < 0)
2925 return;
2926 vc = vc_cons[ops->currcon].d;
2927 if (vc->vc_mode != KD_TEXT ||
2928 registered_fb[con2fb_map[ops->currcon]] != info)
2929 return;
2930
2931 p = &fb_display[vc->vc_num];
2932 set_blitting_type(vc, info);
2933
2934 if (CON_IS_VISIBLE(vc)) {
2935 var_to_display(p, &info->var, info);
2936 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2937 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2938 cols /= vc->vc_font.width;
2939 rows /= vc->vc_font.height;
2940 vc_resize(vc, cols, rows);
2941 updatescrollmode(p, info, vc);
2942 scrollback_max = 0;
2943 scrollback_current = 0;
2944
2945 if (!fbcon_is_inactive(vc, info)) {
2946 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2947 ops->update_start(info);
2948 }
2949
2950 fbcon_set_palette(vc, color_table);
2951 update_screen(vc);
2952 if (softback_buf)
2953 fbcon_update_softback(vc);
2954 }
2955 }
2956
2957 static void fbcon_set_all_vcs(struct fb_info *info)
2958 {
2959 struct fbcon_ops *ops = info->fbcon_par;
2960 struct vc_data *vc;
2961 struct display *p;
2962 int i, rows, cols, fg = -1;
2963
2964 if (!ops || ops->currcon < 0)
2965 return;
2966
2967 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2968 vc = vc_cons[i].d;
2969 if (!vc || vc->vc_mode != KD_TEXT ||
2970 registered_fb[con2fb_map[i]] != info)
2971 continue;
2972
2973 if (CON_IS_VISIBLE(vc)) {
2974 fg = i;
2975 continue;
2976 }
2977
2978 p = &fb_display[vc->vc_num];
2979 set_blitting_type(vc, info);
2980 var_to_display(p, &info->var, info);
2981 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2982 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2983 cols /= vc->vc_font.width;
2984 rows /= vc->vc_font.height;
2985 vc_resize(vc, cols, rows);
2986 }
2987
2988 if (fg != -1)
2989 fbcon_modechanged(info);
2990 }
2991
2992 static int fbcon_mode_deleted(struct fb_info *info,
2993 struct fb_videomode *mode)
2994 {
2995 struct fb_info *fb_info;
2996 struct display *p;
2997 int i, j, found = 0;
2998
2999 /* before deletion, ensure that mode is not in use */
3000 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3001 j = con2fb_map[i];
3002 if (j == -1)
3003 continue;
3004 fb_info = registered_fb[j];
3005 if (fb_info != info)
3006 continue;
3007 p = &fb_display[i];
3008 if (!p || !p->mode)
3009 continue;
3010 if (fb_mode_is_equal(p->mode, mode)) {
3011 found = 1;
3012 break;
3013 }
3014 }
3015 return found;
3016 }
3017
3018 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3019 static int fbcon_unbind(void)
3020 {
3021 int ret;
3022
3023 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3024 fbcon_is_default);
3025 return ret;
3026 }
3027 #else
3028 static inline int fbcon_unbind(void)
3029 {
3030 return -EINVAL;
3031 }
3032 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3033
3034 static int fbcon_fb_unbind(int idx)
3035 {
3036 int i, new_idx = -1, ret = 0;
3037
3038 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3039 if (con2fb_map[i] != idx &&
3040 con2fb_map[i] != -1) {
3041 new_idx = i;
3042 break;
3043 }
3044 }
3045
3046 if (new_idx != -1) {
3047 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3048 if (con2fb_map[i] == idx)
3049 set_con2fb_map(i, new_idx, 0);
3050 }
3051 } else
3052 ret = fbcon_unbind();
3053
3054 return ret;
3055 }
3056
3057 static int fbcon_fb_unregistered(struct fb_info *info)
3058 {
3059 int i, idx = info->node;
3060
3061 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3062 if (con2fb_map[i] == idx)
3063 con2fb_map[i] = -1;
3064 }
3065
3066 if (idx == info_idx) {
3067 info_idx = -1;
3068
3069 for (i = 0; i < FB_MAX; i++) {
3070 if (registered_fb[i] != NULL) {
3071 info_idx = i;
3072 break;
3073 }
3074 }
3075 }
3076
3077 if (info_idx != -1) {
3078 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3079 if (con2fb_map[i] == -1)
3080 con2fb_map[i] = info_idx;
3081 }
3082 }
3083
3084 if (!num_registered_fb)
3085 unregister_con_driver(&fb_con);
3086
3087
3088 if (primary_device == idx)
3089 primary_device = -1;
3090
3091 return 0;
3092 }
3093
3094 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3095 static void fbcon_select_primary(struct fb_info *info)
3096 {
3097 if (!map_override && primary_device == -1 &&
3098 fb_is_primary_device(info)) {
3099 int i;
3100
3101 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3102 info->fix.id, info->node);
3103 primary_device = info->node;
3104
3105 for (i = first_fb_vc; i <= last_fb_vc; i++)
3106 con2fb_map_boot[i] = primary_device;
3107
3108 if (con_is_bound(&fb_con)) {
3109 printk(KERN_INFO "fbcon: Remapping primary device, "
3110 "fb%i, to tty %i-%i\n", info->node,
3111 first_fb_vc + 1, last_fb_vc + 1);
3112 info_idx = primary_device;
3113 }
3114 }
3115
3116 }
3117 #else
3118 static inline void fbcon_select_primary(struct fb_info *info)
3119 {
3120 return;
3121 }
3122 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3123
3124 static int fbcon_fb_registered(struct fb_info *info)
3125 {
3126 int ret = 0, i, idx = info->node;
3127
3128 fbcon_select_primary(info);
3129
3130 if (info_idx == -1) {
3131 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3132 if (con2fb_map_boot[i] == idx) {
3133 info_idx = idx;
3134 break;
3135 }
3136 }
3137
3138 if (info_idx != -1)
3139 ret = fbcon_takeover(1);
3140 } else {
3141 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3142 if (con2fb_map_boot[i] == idx)
3143 set_con2fb_map(i, idx, 0);
3144 }
3145 }
3146
3147 return ret;
3148 }
3149
3150 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3151 {
3152 struct fbcon_ops *ops = info->fbcon_par;
3153 struct vc_data *vc;
3154
3155 if (!ops || ops->currcon < 0)
3156 return;
3157
3158 vc = vc_cons[ops->currcon].d;
3159 if (vc->vc_mode != KD_TEXT ||
3160 registered_fb[con2fb_map[ops->currcon]] != info)
3161 return;
3162
3163 if (CON_IS_VISIBLE(vc)) {
3164 if (blank)
3165 do_blank_screen(0);
3166 else
3167 do_unblank_screen(0);
3168 }
3169 ops->blank_state = blank;
3170 }
3171
3172 static void fbcon_new_modelist(struct fb_info *info)
3173 {
3174 int i;
3175 struct vc_data *vc;
3176 struct fb_var_screeninfo var;
3177 const struct fb_videomode *mode;
3178
3179 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3180 if (registered_fb[con2fb_map[i]] != info)
3181 continue;
3182 if (!fb_display[i].mode)
3183 continue;
3184 vc = vc_cons[i].d;
3185 display_to_var(&var, &fb_display[i]);
3186 mode = fb_find_nearest_mode(fb_display[i].mode,
3187 &info->modelist);
3188 fb_videomode_to_var(&var, mode);
3189 fbcon_set_disp(info, &var, vc->vc_num);
3190 }
3191 }
3192
3193 static void fbcon_get_requirement(struct fb_info *info,
3194 struct fb_blit_caps *caps)
3195 {
3196 struct vc_data *vc;
3197 struct display *p;
3198
3199 if (caps->flags) {
3200 int i, charcnt;
3201
3202 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3203 vc = vc_cons[i].d;
3204 if (vc && vc->vc_mode == KD_TEXT &&
3205 info->node == con2fb_map[i]) {
3206 p = &fb_display[i];
3207 caps->x |= 1 << (vc->vc_font.width - 1);
3208 caps->y |= 1 << (vc->vc_font.height - 1);
3209 charcnt = (p->userfont) ?
3210 FNTCHARCNT(p->fontdata) : 256;
3211 if (caps->len < charcnt)
3212 caps->len = charcnt;
3213 }
3214 }
3215 } else {
3216 vc = vc_cons[fg_console].d;
3217
3218 if (vc && vc->vc_mode == KD_TEXT &&
3219 info->node == con2fb_map[fg_console]) {
3220 p = &fb_display[fg_console];
3221 caps->x = 1 << (vc->vc_font.width - 1);
3222 caps->y = 1 << (vc->vc_font.height - 1);
3223 caps->len = (p->userfont) ?
3224 FNTCHARCNT(p->fontdata) : 256;
3225 }
3226 }
3227 }
3228
3229 static int fbcon_event_notify(struct notifier_block *self,
3230 unsigned long action, void *data)
3231 {
3232 struct fb_event *event = data;
3233 struct fb_info *info = event->info;
3234 struct fb_videomode *mode;
3235 struct fb_con2fbmap *con2fb;
3236 struct fb_blit_caps *caps;
3237 int ret = 0;
3238
3239 /*
3240 * ignore all events except driver registration and deregistration
3241 * if fbcon is not active
3242 */
3243 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3244 action == FB_EVENT_FB_UNREGISTERED))
3245 goto done;
3246
3247 switch(action) {
3248 case FB_EVENT_SUSPEND:
3249 fbcon_suspended(info);
3250 break;
3251 case FB_EVENT_RESUME:
3252 fbcon_resumed(info);
3253 break;
3254 case FB_EVENT_MODE_CHANGE:
3255 fbcon_modechanged(info);
3256 break;
3257 case FB_EVENT_MODE_CHANGE_ALL:
3258 fbcon_set_all_vcs(info);
3259 break;
3260 case FB_EVENT_MODE_DELETE:
3261 mode = event->data;
3262 ret = fbcon_mode_deleted(info, mode);
3263 break;
3264 case FB_EVENT_FB_UNBIND:
3265 ret = fbcon_fb_unbind(info->node);
3266 break;
3267 case FB_EVENT_FB_REGISTERED:
3268 ret = fbcon_fb_registered(info);
3269 break;
3270 case FB_EVENT_FB_UNREGISTERED:
3271 ret = fbcon_fb_unregistered(info);
3272 break;
3273 case FB_EVENT_SET_CONSOLE_MAP:
3274 con2fb = event->data;
3275 ret = set_con2fb_map(con2fb->console - 1,
3276 con2fb->framebuffer, 1);
3277 break;
3278 case FB_EVENT_GET_CONSOLE_MAP:
3279 con2fb = event->data;
3280 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3281 break;
3282 case FB_EVENT_BLANK:
3283 fbcon_fb_blanked(info, *(int *)event->data);
3284 break;
3285 case FB_EVENT_NEW_MODELIST:
3286 fbcon_new_modelist(info);
3287 break;
3288 case FB_EVENT_GET_REQ:
3289 caps = event->data;
3290 fbcon_get_requirement(info, caps);
3291 break;
3292 }
3293
3294 done:
3295 return ret;
3296 }
3297
3298 /*
3299 * The console `switch' structure for the frame buffer based console
3300 */
3301
3302 static const struct consw fb_con = {
3303 .owner = THIS_MODULE,
3304 .con_startup = fbcon_startup,
3305 .con_init = fbcon_init,
3306 .con_deinit = fbcon_deinit,
3307 .con_clear = fbcon_clear,
3308 .con_putc = fbcon_putc,
3309 .con_putcs = fbcon_putcs,
3310 .con_cursor = fbcon_cursor,
3311 .con_scroll = fbcon_scroll,
3312 .con_bmove = fbcon_bmove,
3313 .con_switch = fbcon_switch,
3314 .con_blank = fbcon_blank,
3315 .con_font_set = fbcon_set_font,
3316 .con_font_get = fbcon_get_font,
3317 .con_font_default = fbcon_set_def_font,
3318 .con_font_copy = fbcon_copy_font,
3319 .con_set_palette = fbcon_set_palette,
3320 .con_scrolldelta = fbcon_scrolldelta,
3321 .con_set_origin = fbcon_set_origin,
3322 .con_invert_region = fbcon_invert_region,
3323 .con_screen_pos = fbcon_screen_pos,
3324 .con_getxy = fbcon_getxy,
3325 .con_resize = fbcon_resize,
3326 };
3327
3328 static struct notifier_block fbcon_event_notifier = {
3329 .notifier_call = fbcon_event_notify,
3330 };
3331
3332 static ssize_t store_rotate(struct device *device,
3333 struct device_attribute *attr, const char *buf,
3334 size_t count)
3335 {
3336 struct fb_info *info;
3337 int rotate, idx;
3338 char **last = NULL;
3339
3340 if (fbcon_has_exited)
3341 return count;
3342
3343 acquire_console_sem();
3344 idx = con2fb_map[fg_console];
3345
3346 if (idx == -1 || registered_fb[idx] == NULL)
3347 goto err;
3348
3349 info = registered_fb[idx];
3350 rotate = simple_strtoul(buf, last, 0);
3351 fbcon_rotate(info, rotate);
3352 err:
3353 release_console_sem();
3354 return count;
3355 }
3356
3357 static ssize_t store_rotate_all(struct device *device,
3358 struct device_attribute *attr,const char *buf,
3359 size_t count)
3360 {
3361 struct fb_info *info;
3362 int rotate, idx;
3363 char **last = NULL;
3364
3365 if (fbcon_has_exited)
3366 return count;
3367
3368 acquire_console_sem();
3369 idx = con2fb_map[fg_console];
3370
3371 if (idx == -1 || registered_fb[idx] == NULL)
3372 goto err;
3373
3374 info = registered_fb[idx];
3375 rotate = simple_strtoul(buf, last, 0);
3376 fbcon_rotate_all(info, rotate);
3377 err:
3378 release_console_sem();
3379 return count;
3380 }
3381
3382 static ssize_t show_rotate(struct device *device,
3383 struct device_attribute *attr,char *buf)
3384 {
3385 struct fb_info *info;
3386 int rotate = 0, idx;
3387
3388 if (fbcon_has_exited)
3389 return 0;
3390
3391 acquire_console_sem();
3392 idx = con2fb_map[fg_console];
3393
3394 if (idx == -1 || registered_fb[idx] == NULL)
3395 goto err;
3396
3397 info = registered_fb[idx];
3398 rotate = fbcon_get_rotate(info);
3399 err:
3400 release_console_sem();
3401 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3402 }
3403
3404 static ssize_t show_cursor_blink(struct device *device,
3405 struct device_attribute *attr, char *buf)
3406 {
3407 struct fb_info *info;
3408 struct fbcon_ops *ops;
3409 int idx, blink = -1;
3410
3411 if (fbcon_has_exited)
3412 return 0;
3413
3414 acquire_console_sem();
3415 idx = con2fb_map[fg_console];
3416
3417 if (idx == -1 || registered_fb[idx] == NULL)
3418 goto err;
3419
3420 info = registered_fb[idx];
3421 ops = info->fbcon_par;
3422
3423 if (!ops)
3424 goto err;
3425
3426 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3427 err:
3428 release_console_sem();
3429 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3430 }
3431
3432 static ssize_t store_cursor_blink(struct device *device,
3433 struct device_attribute *attr,
3434 const char *buf, size_t count)
3435 {
3436 struct fb_info *info;
3437 int blink, idx;
3438 char **last = NULL;
3439
3440 if (fbcon_has_exited)
3441 return count;
3442
3443 acquire_console_sem();
3444 idx = con2fb_map[fg_console];
3445
3446 if (idx == -1 || registered_fb[idx] == NULL)
3447 goto err;
3448
3449 info = registered_fb[idx];
3450
3451 if (!info->fbcon_par)
3452 goto err;
3453
3454 blink = simple_strtoul(buf, last, 0);
3455
3456 if (blink) {
3457 fbcon_cursor_noblink = 0;
3458 fbcon_add_cursor_timer(info);
3459 } else {
3460 fbcon_cursor_noblink = 1;
3461 fbcon_del_cursor_timer(info);
3462 }
3463
3464 err:
3465 release_console_sem();
3466 return count;
3467 }
3468
3469 static struct device_attribute device_attrs[] = {
3470 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3471 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3472 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3473 store_cursor_blink),
3474 };
3475
3476 static int fbcon_init_device(void)
3477 {
3478 int i, error = 0;
3479
3480 fbcon_has_sysfs = 1;
3481
3482 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3483 error = device_create_file(fbcon_device, &device_attrs[i]);
3484
3485 if (error)
3486 break;
3487 }
3488
3489 if (error) {
3490 while (--i >= 0)
3491 device_remove_file(fbcon_device, &device_attrs[i]);
3492
3493 fbcon_has_sysfs = 0;
3494 }
3495
3496 return 0;
3497 }
3498
3499 static void fbcon_start(void)
3500 {
3501 if (num_registered_fb) {
3502 int i;
3503
3504 acquire_console_sem();
3505
3506 for (i = 0; i < FB_MAX; i++) {
3507 if (registered_fb[i] != NULL) {
3508 info_idx = i;
3509 break;
3510 }
3511 }
3512
3513 release_console_sem();
3514 fbcon_takeover(0);
3515 }
3516 }
3517
3518 static void fbcon_exit(void)
3519 {
3520 struct fb_info *info;
3521 int i, j, mapped;
3522
3523 if (fbcon_has_exited)
3524 return;
3525
3526 #ifdef CONFIG_ATARI
3527 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3528 #endif
3529 #ifdef CONFIG_MAC
3530 if (MACH_IS_MAC && vbl_detected)
3531 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3532 #endif
3533
3534 kfree((void *)softback_buf);
3535 softback_buf = 0UL;
3536
3537 for (i = 0; i < FB_MAX; i++) {
3538 mapped = 0;
3539 info = registered_fb[i];
3540
3541 if (info == NULL)
3542 continue;
3543
3544 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3545 if (con2fb_map[j] == i)
3546 mapped = 1;
3547 }
3548
3549 if (mapped) {
3550 if (info->fbops->fb_release)
3551 info->fbops->fb_release(info, 0);
3552 module_put(info->fbops->owner);
3553
3554 if (info->fbcon_par) {
3555 struct fbcon_ops *ops = info->fbcon_par;
3556
3557 fbcon_del_cursor_timer(info);
3558 kfree(ops->cursor_src);
3559 kfree(info->fbcon_par);
3560 info->fbcon_par = NULL;
3561 }
3562
3563 if (info->queue.func == fb_flashcursor)
3564 info->queue.func = NULL;
3565 }
3566 }
3567
3568 fbcon_has_exited = 1;
3569 }
3570
3571 static int __init fb_console_init(void)
3572 {
3573 int i;
3574
3575 acquire_console_sem();
3576 fb_register_client(&fbcon_event_notifier);
3577 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3578
3579 if (IS_ERR(fbcon_device)) {
3580 printk(KERN_WARNING "Unable to create device "
3581 "for fbcon; errno = %ld\n",
3582 PTR_ERR(fbcon_device));
3583 fbcon_device = NULL;
3584 } else
3585 fbcon_init_device();
3586
3587 for (i = 0; i < MAX_NR_CONSOLES; i++)
3588 con2fb_map[i] = -1;
3589
3590 release_console_sem();
3591 fbcon_start();
3592 return 0;
3593 }
3594
3595 module_init(fb_console_init);
3596
3597 #ifdef MODULE
3598
3599 static void __exit fbcon_deinit_device(void)
3600 {
3601 int i;
3602
3603 if (fbcon_has_sysfs) {
3604 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3605 device_remove_file(fbcon_device, &device_attrs[i]);
3606
3607 fbcon_has_sysfs = 0;
3608 }
3609 }
3610
3611 static void __exit fb_console_exit(void)
3612 {
3613 acquire_console_sem();
3614 fb_unregister_client(&fbcon_event_notifier);
3615 fbcon_deinit_device();
3616 device_destroy(fb_class, MKDEV(0, 0));
3617 fbcon_exit();
3618 release_console_sem();
3619 unregister_con_driver(&fb_con);
3620 }
3621
3622 module_exit(fb_console_exit);
3623
3624 #endif
3625
3626 MODULE_LICENSE("GPL");
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