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[PATCH] W1: w1_netlink: New init/fini netlink callbacks.
[linux-2.6/verdex.git] / drivers / video / console / fbcon.c
blob35c88bd7ba5e43d16bb49c08bb76ad5ddd43541d
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/config.h>
62 #include <linux/module.h>
63 #include <linux/types.h>
64 #include <linux/sched.h>
65 #include <linux/fs.h>
66 #include <linux/kernel.h>
67 #include <linux/delay.h> /* MSch: for IRQ probe */
68 #include <linux/tty.h>
69 #include <linux/console.h>
70 #include <linux/string.h>
71 #include <linux/kd.h>
72 #include <linux/slab.h>
73 #include <linux/fb.h>
74 #include <linux/vt_kern.h>
75 #include <linux/selection.h>
76 #include <linux/font.h>
77 #include <linux/smp.h>
78 #include <linux/init.h>
79 #include <linux/interrupt.h>
80 #include <linux/crc32.h> /* For counting font checksums */
81 #include <asm/irq.h>
82 #include <asm/system.h>
83 #include <asm/uaccess.h>
84 #ifdef CONFIG_ATARI
85 #include <asm/atariints.h>
86 #endif
87 #ifdef CONFIG_MAC
88 #include <asm/macints.h>
89 #endif
90 #if defined(__mc68000__) || defined(CONFIG_APUS)
91 #include <asm/machdep.h>
92 #include <asm/setup.h>
93 #endif
94
95 #include "fbcon.h"
96
97 #ifdef FBCONDEBUG
98 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
99 #else
100 # define DPRINTK(fmt, args...)
101 #endif
102
103 enum {
104 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
105 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
106 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
107 };
108
109 struct display fb_display[MAX_NR_CONSOLES];
110 static signed char con2fb_map[MAX_NR_CONSOLES];
111 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
112 static int logo_height;
113 static int logo_lines;
114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116 static int logo_shown = FBCON_LOGO_CANSHOW;
117 /* Software scrollback */
118 static int fbcon_softback_size = 32768;
119 static unsigned long softback_buf, softback_curr;
120 static unsigned long softback_in;
121 static unsigned long softback_top, softback_end;
122 static int softback_lines;
123 /* console mappings */
124 static int first_fb_vc;
125 static int last_fb_vc = MAX_NR_CONSOLES - 1;
126 static int fbcon_is_default = 1;
127 /* font data */
128 static char fontname[40];
129
130 /* current fb_info */
131 static int info_idx = -1;
132
133 static const struct consw fb_con;
134
135 #define CM_SOFTBACK (8)
136
137 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
138
139 static void fbcon_free_font(struct display *);
140 static int fbcon_set_origin(struct vc_data *);
141
142 #define CURSOR_DRAW_DELAY (1)
143
144 /* # VBL ints between cursor state changes */
145 #define ATARI_CURSOR_BLINK_RATE (42)
146 #define MAC_CURSOR_BLINK_RATE (32)
147 #define DEFAULT_CURSOR_BLINK_RATE (20)
148
149 static int vbl_cursor_cnt;
150
151 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153 /*
154 * Interface used by the world
155 */
156
157 static const char *fbcon_startup(void);
158 static void fbcon_init(struct vc_data *vc, int init);
159 static void fbcon_deinit(struct vc_data *vc);
160 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166 static void fbcon_cursor(struct vc_data *vc, int mode);
167 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171 static int fbcon_switch(struct vc_data *vc);
172 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176 /*
177 * Internal routines
178 */
179 static __inline__ int real_y(struct display *p, int ypos);
180 static __inline__ void ywrap_up(struct vc_data *vc, int count);
181 static __inline__ void ywrap_down(struct vc_data *vc, int count);
182 static __inline__ void ypan_up(struct vc_data *vc, int count);
183 static __inline__ void ypan_down(struct vc_data *vc, int count);
184 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
185 int dy, int dx, int height, int width, u_int y_break);
186 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
187 struct vc_data *vc);
188 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 int unit);
190 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
191 int line, int count, int dy);
192
193 #ifdef CONFIG_MAC
194 /*
195 * On the Macintoy, there may or may not be a working VBL int. We need to probe
196 */
197 static int vbl_detected;
198
199 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
200 {
201 vbl_detected++;
202 return IRQ_HANDLED;
203 }
204 #endif
205
206 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
207 {
208 struct fbcon_ops *ops = info->fbcon_par;
209
210 return (info->state != FBINFO_STATE_RUNNING ||
211 vc->vc_mode != KD_TEXT || ops->graphics);
212 }
213
214 static inline int get_color(struct vc_data *vc, struct fb_info *info,
215 u16 c, int is_fg)
216 {
217 int depth = fb_get_color_depth(&info->var);
218 int color = 0;
219
220 if (console_blanked) {
221 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
222
223 c = vc->vc_video_erase_char & charmask;
224 }
225
226 if (depth != 1)
227 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
228 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
229
230 switch (depth) {
231 case 1:
232 {
233 /* 0 or 1 */
234 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? 1 : 0;
235 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : 1;
236
237 if (console_blanked)
238 fg = bg;
239
240 color = (is_fg) ? fg : bg;
241 break;
242 }
243 case 2:
244 /*
245 * Scale down 16-colors to 4 colors. Default 4-color palette
246 * is grayscale.
247 */
248 color /= 4;
249 break;
250 case 3:
251 /*
252 * Last 8 entries of default 16-color palette is a more intense
253 * version of the first 8 (i.e., same chrominance, different
254 * luminance).
255 */
256 color &= 7;
257 break;
258 }
259
260
261 return color;
262 }
263
264 static void fb_flashcursor(void *private)
265 {
266 struct fb_info *info = private;
267 struct fbcon_ops *ops = info->fbcon_par;
268 struct display *p;
269 struct vc_data *vc = NULL;
270 int c;
271 int mode;
272
273 if (ops->currcon != -1)
274 vc = vc_cons[ops->currcon].d;
275
276 if (!vc || !CON_IS_VISIBLE(vc) ||
277 fbcon_is_inactive(vc, info) ||
278 registered_fb[con2fb_map[vc->vc_num]] != info ||
279 vc_cons[ops->currcon].d->vc_deccm != 1)
280 return;
281 acquire_console_sem();
282 p = &fb_display[vc->vc_num];
283 c = scr_readw((u16 *) vc->vc_pos);
284 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
285 CM_ERASE : CM_DRAW;
286 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
287 get_color(vc, info, c, 0));
288 release_console_sem();
289 }
290
291 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
292 static int cursor_blink_rate;
293 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
294 {
295 struct fb_info *info = dev_id;
296
297 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
298 schedule_work(&info->queue);
299 vbl_cursor_cnt = cursor_blink_rate;
300 }
301 return IRQ_HANDLED;
302 }
303 #endif
304
305 static void cursor_timer_handler(unsigned long dev_addr)
306 {
307 struct fb_info *info = (struct fb_info *) dev_addr;
308 struct fbcon_ops *ops = info->fbcon_par;
309
310 schedule_work(&info->queue);
311 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
312 }
313
314 #ifndef MODULE
315 static int __init fb_console_setup(char *this_opt)
316 {
317 char *options;
318 int i, j;
319
320 if (!this_opt || !*this_opt)
321 return 0;
322
323 while ((options = strsep(&this_opt, ",")) != NULL) {
324 if (!strncmp(options, "font:", 5))
325 strcpy(fontname, options + 5);
326
327 if (!strncmp(options, "scrollback:", 11)) {
328 options += 11;
329 if (*options) {
330 fbcon_softback_size = simple_strtoul(options, &options, 0);
331 if (*options == 'k' || *options == 'K') {
332 fbcon_softback_size *= 1024;
333 options++;
334 }
335 if (*options != ',')
336 return 0;
337 options++;
338 } else
339 return 0;
340 }
341
342 if (!strncmp(options, "map:", 4)) {
343 options += 4;
344 if (*options)
345 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
346 if (!options[j])
347 j = 0;
348 con2fb_map_boot[i] =
349 (options[j++]-'0') % FB_MAX;
350 }
351 return 0;
352 }
353
354 if (!strncmp(options, "vc:", 3)) {
355 options += 3;
356 if (*options)
357 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
358 if (first_fb_vc < 0)
359 first_fb_vc = 0;
360 if (*options++ == '-')
361 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
362 fbcon_is_default = 0;
363 }
364 }
365 return 0;
366 }
367
368 __setup("fbcon=", fb_console_setup);
369 #endif
370
371 static int search_fb_in_map(int idx)
372 {
373 int i, retval = 0;
374
375 for (i = 0; i < MAX_NR_CONSOLES; i++) {
376 if (con2fb_map[i] == idx)
377 retval = 1;
378 }
379 return retval;
380 }
381
382 static int search_for_mapped_con(void)
383 {
384 int i, retval = 0;
385
386 for (i = 0; i < MAX_NR_CONSOLES; i++) {
387 if (con2fb_map[i] != -1)
388 retval = 1;
389 }
390 return retval;
391 }
392
393 static int fbcon_takeover(int show_logo)
394 {
395 int err, i;
396
397 if (!num_registered_fb)
398 return -ENODEV;
399
400 if (!show_logo)
401 logo_shown = FBCON_LOGO_DONTSHOW;
402
403 for (i = first_fb_vc; i <= last_fb_vc; i++)
404 con2fb_map[i] = info_idx;
405
406 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
407 fbcon_is_default);
408 if (err) {
409 for (i = first_fb_vc; i <= last_fb_vc; i++) {
410 con2fb_map[i] = -1;
411 }
412 info_idx = -1;
413 }
414
415 return err;
416 }
417
418 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
419 int cols, int rows, int new_cols, int new_rows)
420 {
421 /* Need to make room for the logo */
422 int cnt, erase = vc->vc_video_erase_char, step;
423 unsigned short *save = NULL, *r, *q;
424
425 /*
426 * remove underline attribute from erase character
427 * if black and white framebuffer.
428 */
429 if (fb_get_color_depth(&info->var) == 1)
430 erase &= ~0x400;
431 logo_height = fb_prepare_logo(info);
432 logo_lines = (logo_height + vc->vc_font.height - 1) /
433 vc->vc_font.height;
434 q = (unsigned short *) (vc->vc_origin +
435 vc->vc_size_row * rows);
436 step = logo_lines * cols;
437 for (r = q - logo_lines * cols; r < q; r++)
438 if (scr_readw(r) != vc->vc_video_erase_char)
439 break;
440 if (r != q && new_rows >= rows + logo_lines) {
441 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
442 if (save) {
443 int i = cols < new_cols ? cols : new_cols;
444 scr_memsetw(save, erase, logo_lines * new_cols * 2);
445 r = q - step;
446 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
447 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
448 r = q;
449 }
450 }
451 if (r == q) {
452 /* We can scroll screen down */
453 r = q - step - cols;
454 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
455 scr_memcpyw(r + step, r, vc->vc_size_row);
456 r -= cols;
457 }
458 if (!save) {
459 vc->vc_y += logo_lines;
460 vc->vc_pos += logo_lines * vc->vc_size_row;
461 }
462 }
463 scr_memsetw((unsigned short *) vc->vc_origin,
464 erase,
465 vc->vc_size_row * logo_lines);
466
467 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
468 fbcon_clear_margins(vc, 0);
469 update_screen(vc);
470 }
471
472 if (save) {
473 q = (unsigned short *) (vc->vc_origin +
474 vc->vc_size_row *
475 rows);
476 scr_memcpyw(q, save, logo_lines * new_cols * 2);
477 vc->vc_y += logo_lines;
478 vc->vc_pos += logo_lines * vc->vc_size_row;
479 kfree(save);
480 }
481
482 if (logo_lines > vc->vc_bottom) {
483 logo_shown = FBCON_LOGO_CANSHOW;
484 printk(KERN_INFO
485 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
486 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
487 logo_shown = FBCON_LOGO_DRAW;
488 vc->vc_top = logo_lines;
489 }
490 }
491
492 #ifdef CONFIG_FB_TILEBLITTING
493 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
494 struct display *p)
495 {
496 struct fbcon_ops *ops = info->fbcon_par;
497
498 if ((info->flags & FBINFO_MISC_TILEBLITTING))
499 fbcon_set_tileops(vc, info, p, ops);
500 else
501 fbcon_set_bitops(ops);
502 }
503 #else
504 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
505 struct display *p)
506 {
507 struct fbcon_ops *ops = info->fbcon_par;
508
509 info->flags &= ~FBINFO_MISC_TILEBLITTING;
510 fbcon_set_bitops(ops);
511 }
512 #endif /* CONFIG_MISC_TILEBLITTING */
513
514
515 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
516 int unit, int oldidx)
517 {
518 struct fbcon_ops *ops = NULL;
519 int err = 0;
520
521 if (!try_module_get(info->fbops->owner))
522 err = -ENODEV;
523
524 if (!err && info->fbops->fb_open &&
525 info->fbops->fb_open(info, 0))
526 err = -ENODEV;
527
528 if (!err) {
529 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
530 if (!ops)
531 err = -ENOMEM;
532 }
533
534 if (!err) {
535 memset(ops, 0, sizeof(struct fbcon_ops));
536 info->fbcon_par = ops;
537 set_blitting_type(vc, info, NULL);
538 }
539
540 if (err) {
541 con2fb_map[unit] = oldidx;
542 module_put(info->fbops->owner);
543 }
544
545 return err;
546 }
547
548 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
549 struct fb_info *newinfo, int unit,
550 int oldidx, int found)
551 {
552 struct fbcon_ops *ops = oldinfo->fbcon_par;
553 int err = 0;
554
555 if (oldinfo->fbops->fb_release &&
556 oldinfo->fbops->fb_release(oldinfo, 0)) {
557 con2fb_map[unit] = oldidx;
558 if (!found && newinfo->fbops->fb_release)
559 newinfo->fbops->fb_release(newinfo, 0);
560 if (!found)
561 module_put(newinfo->fbops->owner);
562 err = -ENODEV;
563 }
564
565 if (!err) {
566 if (oldinfo->queue.func == fb_flashcursor)
567 del_timer_sync(&ops->cursor_timer);
568
569 kfree(ops->cursor_state.mask);
570 kfree(ops->cursor_data);
571 kfree(oldinfo->fbcon_par);
572 oldinfo->fbcon_par = NULL;
573 module_put(oldinfo->fbops->owner);
574 }
575
576 return err;
577 }
578
579 static void con2fb_init_newinfo(struct fb_info *info)
580 {
581 if (!info->queue.func || info->queue.func == fb_flashcursor) {
582 struct fbcon_ops *ops = info->fbcon_par;
583
584 if (!info->queue.func)
585 INIT_WORK(&info->queue, fb_flashcursor, info);
586
587 init_timer(&ops->cursor_timer);
588 ops->cursor_timer.function = cursor_timer_handler;
589 ops->cursor_timer.expires = jiffies + HZ / 5;
590 ops->cursor_timer.data = (unsigned long ) info;
591 add_timer(&ops->cursor_timer);
592 }
593 }
594
595 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
596 int unit, int show_logo)
597 {
598 struct fbcon_ops *ops = info->fbcon_par;
599
600 ops->currcon = fg_console;
601
602 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
603 info->fbops->fb_set_par(info);
604
605 ops->flags |= FBCON_FLAGS_INIT;
606 ops->graphics = 0;
607
608 if (vc)
609 fbcon_set_disp(info, &info->var, vc);
610 else
611 fbcon_preset_disp(info, &info->var, unit);
612
613 if (show_logo) {
614 struct vc_data *fg_vc = vc_cons[fg_console].d;
615 struct fb_info *fg_info =
616 registered_fb[con2fb_map[fg_console]];
617
618 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
619 fg_vc->vc_rows, fg_vc->vc_cols,
620 fg_vc->vc_rows);
621 }
622
623 update_screen(vc_cons[fg_console].d);
624 }
625
626 /**
627 * set_con2fb_map - map console to frame buffer device
628 * @unit: virtual console number to map
629 * @newidx: frame buffer index to map virtual console to
630 * @user: user request
631 *
632 * Maps a virtual console @unit to a frame buffer device
633 * @newidx.
634 */
635 static int set_con2fb_map(int unit, int newidx, int user)
636 {
637 struct vc_data *vc = vc_cons[unit].d;
638 int oldidx = con2fb_map[unit];
639 struct fb_info *info = registered_fb[newidx];
640 struct fb_info *oldinfo = NULL;
641 int found, err = 0;
642
643 if (oldidx == newidx)
644 return 0;
645
646 if (!info)
647 err = -EINVAL;
648
649 if (!err && !search_for_mapped_con()) {
650 info_idx = newidx;
651 return fbcon_takeover(0);
652 }
653
654 if (oldidx != -1)
655 oldinfo = registered_fb[oldidx];
656
657 found = search_fb_in_map(newidx);
658
659 acquire_console_sem();
660 con2fb_map[unit] = newidx;
661 if (!err && !found)
662 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
663
664
665 /*
666 * If old fb is not mapped to any of the consoles,
667 * fbcon should release it.
668 */
669 if (!err && oldinfo && !search_fb_in_map(oldidx))
670 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
671 found);
672
673 if (!err) {
674 int show_logo = (fg_console == 0 && !user &&
675 logo_shown != FBCON_LOGO_DONTSHOW);
676
677 if (!found)
678 con2fb_init_newinfo(info);
679 con2fb_map_boot[unit] = newidx;
680 con2fb_init_display(vc, info, unit, show_logo);
681 }
682
683 release_console_sem();
684 return err;
685 }
686
687 /*
688 * Low Level Operations
689 */
690 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
691 static int var_to_display(struct display *disp,
692 struct fb_var_screeninfo *var,
693 struct fb_info *info)
694 {
695 disp->xres_virtual = var->xres_virtual;
696 disp->yres_virtual = var->yres_virtual;
697 disp->bits_per_pixel = var->bits_per_pixel;
698 disp->grayscale = var->grayscale;
699 disp->nonstd = var->nonstd;
700 disp->accel_flags = var->accel_flags;
701 disp->height = var->height;
702 disp->width = var->width;
703 disp->red = var->red;
704 disp->green = var->green;
705 disp->blue = var->blue;
706 disp->transp = var->transp;
707 disp->rotate = var->rotate;
708 disp->mode = fb_match_mode(var, &info->modelist);
709 if (disp->mode == NULL)
710 /* This should not happen */
711 return -EINVAL;
712 return 0;
713 }
714
715 static void display_to_var(struct fb_var_screeninfo *var,
716 struct display *disp)
717 {
718 fb_videomode_to_var(var, disp->mode);
719 var->xres_virtual = disp->xres_virtual;
720 var->yres_virtual = disp->yres_virtual;
721 var->bits_per_pixel = disp->bits_per_pixel;
722 var->grayscale = disp->grayscale;
723 var->nonstd = disp->nonstd;
724 var->accel_flags = disp->accel_flags;
725 var->height = disp->height;
726 var->width = disp->width;
727 var->red = disp->red;
728 var->green = disp->green;
729 var->blue = disp->blue;
730 var->transp = disp->transp;
731 var->rotate = disp->rotate;
732 }
733
734 static const char *fbcon_startup(void)
735 {
736 const char *display_desc = "frame buffer device";
737 struct display *p = &fb_display[fg_console];
738 struct vc_data *vc = vc_cons[fg_console].d;
739 struct font_desc *font = NULL;
740 struct module *owner;
741 struct fb_info *info = NULL;
742 struct fbcon_ops *ops;
743 int rows, cols;
744 int irqres;
745
746 irqres = 1;
747 /*
748 * If num_registered_fb is zero, this is a call for the dummy part.
749 * The frame buffer devices weren't initialized yet.
750 */
751 if (!num_registered_fb || info_idx == -1)
752 return display_desc;
753 /*
754 * Instead of blindly using registered_fb[0], we use info_idx, set by
755 * fb_console_init();
756 */
757 info = registered_fb[info_idx];
758 if (!info)
759 return NULL;
760
761 owner = info->fbops->owner;
762 if (!try_module_get(owner))
763 return NULL;
764 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
765 module_put(owner);
766 return NULL;
767 }
768
769 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
770 if (!ops) {
771 module_put(owner);
772 return NULL;
773 }
774
775 memset(ops, 0, sizeof(struct fbcon_ops));
776 ops->currcon = -1;
777 ops->graphics = 1;
778 info->fbcon_par = ops;
779 set_blitting_type(vc, info, NULL);
780
781 if (info->fix.type != FB_TYPE_TEXT) {
782 if (fbcon_softback_size) {
783 if (!softback_buf) {
784 softback_buf =
785 (unsigned long)
786 kmalloc(fbcon_softback_size,
787 GFP_KERNEL);
788 if (!softback_buf) {
789 fbcon_softback_size = 0;
790 softback_top = 0;
791 }
792 }
793 } else {
794 if (softback_buf) {
795 kfree((void *) softback_buf);
796 softback_buf = 0;
797 softback_top = 0;
798 }
799 }
800 if (softback_buf)
801 softback_in = softback_top = softback_curr =
802 softback_buf;
803 softback_lines = 0;
804 }
805
806 /* Setup default font */
807 if (!p->fontdata) {
808 if (!fontname[0] || !(font = find_font(fontname)))
809 font = get_default_font(info->var.xres,
810 info->var.yres);
811 vc->vc_font.width = font->width;
812 vc->vc_font.height = font->height;
813 vc->vc_font.data = p->fontdata = font->data;
814 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
815 }
816
817 cols = info->var.xres / vc->vc_font.width;
818 rows = info->var.yres / vc->vc_font.height;
819 vc_resize(vc, cols, rows);
820
821 DPRINTK("mode: %s\n", info->fix.id);
822 DPRINTK("visual: %d\n", info->fix.visual);
823 DPRINTK("res: %dx%d-%d\n", info->var.xres,
824 info->var.yres,
825 info->var.bits_per_pixel);
826
827 #ifdef CONFIG_ATARI
828 if (MACH_IS_ATARI) {
829 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
830 irqres =
831 request_irq(IRQ_AUTO_4, fb_vbl_handler,
832 IRQ_TYPE_PRIO, "framebuffer vbl",
833 info);
834 }
835 #endif /* CONFIG_ATARI */
836
837 #ifdef CONFIG_MAC
838 /*
839 * On a Macintoy, the VBL interrupt may or may not be active.
840 * As interrupt based cursor is more reliable and race free, we
841 * probe for VBL interrupts.
842 */
843 if (MACH_IS_MAC) {
844 int ct = 0;
845 /*
846 * Probe for VBL: set temp. handler ...
847 */
848 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
849 "framebuffer vbl", info);
850 vbl_detected = 0;
851
852 /*
853 * ... and spin for 20 ms ...
854 */
855 while (!vbl_detected && ++ct < 1000)
856 udelay(20);
857
858 if (ct == 1000)
859 printk
860 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
861
862 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
863
864 if (vbl_detected) {
865 /*
866 * interrupt based cursor ok
867 */
868 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
869 irqres =
870 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
871 "framebuffer vbl", info);
872 } else {
873 /*
874 * VBL not detected: fall through, use timer based cursor
875 */
876 irqres = 1;
877 }
878 }
879 #endif /* CONFIG_MAC */
880
881 /* Initialize the work queue. If the driver provides its
882 * own work queue this means it will use something besides
883 * default timer to flash the cursor. */
884 if (!info->queue.func) {
885 INIT_WORK(&info->queue, fb_flashcursor, info);
886
887 init_timer(&ops->cursor_timer);
888 ops->cursor_timer.function = cursor_timer_handler;
889 ops->cursor_timer.expires = jiffies + HZ / 5;
890 ops->cursor_timer.data = (unsigned long ) info;
891 add_timer(&ops->cursor_timer);
892 }
893 return display_desc;
894 }
895
896 static void fbcon_init(struct vc_data *vc, int init)
897 {
898 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
899 struct fbcon_ops *ops;
900 struct vc_data **default_mode = vc->vc_display_fg;
901 struct vc_data *svc = *default_mode;
902 struct display *t, *p = &fb_display[vc->vc_num];
903 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
904 int cap;
905
906 if (info_idx == -1 || info == NULL)
907 return;
908
909 cap = info->flags;
910
911 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
912 (info->fix.type == FB_TYPE_TEXT))
913 logo = 0;
914
915 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
916
917 if (var_to_display(p, &info->var, info))
918 return;
919
920 /* If we are not the first console on this
921 fb, copy the font from that console */
922 t = &fb_display[svc->vc_num];
923 if (!vc->vc_font.data) {
924 vc->vc_font.data = p->fontdata = t->fontdata;
925 vc->vc_font.width = (*default_mode)->vc_font.width;
926 vc->vc_font.height = (*default_mode)->vc_font.height;
927 p->userfont = t->userfont;
928 if (p->userfont)
929 REFCOUNT(p->fontdata)++;
930 }
931 if (p->userfont)
932 charcnt = FNTCHARCNT(p->fontdata);
933 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
934 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
935 if (charcnt == 256) {
936 vc->vc_hi_font_mask = 0;
937 } else {
938 vc->vc_hi_font_mask = 0x100;
939 if (vc->vc_can_do_color)
940 vc->vc_complement_mask <<= 1;
941 }
942
943 if (!*svc->vc_uni_pagedir_loc)
944 con_set_default_unimap(svc);
945 if (!*vc->vc_uni_pagedir_loc)
946 con_copy_unimap(vc, svc);
947
948 cols = vc->vc_cols;
949 rows = vc->vc_rows;
950 new_cols = info->var.xres / vc->vc_font.width;
951 new_rows = info->var.yres / vc->vc_font.height;
952 vc_resize(vc, new_cols, new_rows);
953
954 ops = info->fbcon_par;
955 /*
956 * We must always set the mode. The mode of the previous console
957 * driver could be in the same resolution but we are using different
958 * hardware so we have to initialize the hardware.
959 *
960 * We need to do it in fbcon_init() to prevent screen corruption.
961 */
962 if (CON_IS_VISIBLE(vc)) {
963 if (info->fbops->fb_set_par &&
964 !(ops->flags & FBCON_FLAGS_INIT))
965 info->fbops->fb_set_par(info);
966 ops->flags |= FBCON_FLAGS_INIT;
967 }
968
969 ops->graphics = 0;
970
971 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
972 !(cap & FBINFO_HWACCEL_DISABLED))
973 p->scrollmode = SCROLL_MOVE;
974 else /* default to something safe */
975 p->scrollmode = SCROLL_REDRAW;
976
977 /*
978 * ++guenther: console.c:vc_allocate() relies on initializing
979 * vc_{cols,rows}, but we must not set those if we are only
980 * resizing the console.
981 */
982 if (!init) {
983 vc->vc_cols = new_cols;
984 vc->vc_rows = new_rows;
985 }
986
987 if (logo)
988 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
989
990 if (vc == svc && softback_buf) {
991 int l = fbcon_softback_size / vc->vc_size_row;
992 if (l > 5)
993 softback_end = softback_buf + l * vc->vc_size_row;
994 else {
995 /* Smaller scrollback makes no sense, and 0 would screw
996 the operation totally */
997 softback_top = 0;
998 }
999 }
1000 }
1001
1002 static void fbcon_deinit(struct vc_data *vc)
1003 {
1004 struct display *p = &fb_display[vc->vc_num];
1005
1006 if (info_idx != -1)
1007 return;
1008 fbcon_free_font(p);
1009 }
1010
1011 /* ====================================================================== */
1012
1013 /* fbcon_XXX routines - interface used by the world
1014 *
1015 * This system is now divided into two levels because of complications
1016 * caused by hardware scrolling. Top level functions:
1017 *
1018 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1019 *
1020 * handles y values in range [0, scr_height-1] that correspond to real
1021 * screen positions. y_wrap shift means that first line of bitmap may be
1022 * anywhere on this display. These functions convert lineoffsets to
1023 * bitmap offsets and deal with the wrap-around case by splitting blits.
1024 *
1025 * fbcon_bmove_physical_8() -- These functions fast implementations
1026 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1027 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1028 *
1029 * WARNING:
1030 *
1031 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1032 * Implies should only really hardware scroll in rows. Only reason for
1033 * restriction is simplicity & efficiency at the moment.
1034 */
1035
1036 static __inline__ int real_y(struct display *p, int ypos)
1037 {
1038 int rows = p->vrows;
1039
1040 ypos += p->yscroll;
1041 return ypos < rows ? ypos : ypos - rows;
1042 }
1043
1044
1045 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1046 int width)
1047 {
1048 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1049 struct fbcon_ops *ops = info->fbcon_par;
1050
1051 struct display *p = &fb_display[vc->vc_num];
1052 u_int y_break;
1053
1054 if (fbcon_is_inactive(vc, info))
1055 return;
1056
1057 if (!height || !width)
1058 return;
1059
1060 /* Split blits that cross physical y_wrap boundary */
1061
1062 y_break = p->vrows - p->yscroll;
1063 if (sy < y_break && sy + height - 1 >= y_break) {
1064 u_int b = y_break - sy;
1065 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1066 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1067 width);
1068 } else
1069 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1070 }
1071
1072 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1073 int count, int ypos, int xpos)
1074 {
1075 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1076 struct display *p = &fb_display[vc->vc_num];
1077 struct fbcon_ops *ops = info->fbcon_par;
1078
1079 if (!fbcon_is_inactive(vc, info))
1080 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1081 get_color(vc, info, scr_readw(s), 1),
1082 get_color(vc, info, scr_readw(s), 0));
1083 }
1084
1085 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1086 {
1087 unsigned short chr;
1088
1089 scr_writew(c, &chr);
1090 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1091 }
1092
1093 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1094 {
1095 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1096 struct fbcon_ops *ops = info->fbcon_par;
1097
1098 if (!fbcon_is_inactive(vc, info))
1099 ops->clear_margins(vc, info, bottom_only);
1100 }
1101
1102 static void fbcon_cursor(struct vc_data *vc, int mode)
1103 {
1104 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1105 struct fbcon_ops *ops = info->fbcon_par;
1106 struct display *p = &fb_display[vc->vc_num];
1107 int y;
1108 int c = scr_readw((u16 *) vc->vc_pos);
1109
1110 if (fbcon_is_inactive(vc, info))
1111 return;
1112
1113 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1114 if (mode & CM_SOFTBACK) {
1115 mode &= ~CM_SOFTBACK;
1116 y = softback_lines;
1117 } else {
1118 if (softback_lines)
1119 fbcon_set_origin(vc);
1120 y = 0;
1121 }
1122
1123 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1124 get_color(vc, info, c, 0));
1125 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1126 }
1127
1128 static int scrollback_phys_max = 0;
1129 static int scrollback_max = 0;
1130 static int scrollback_current = 0;
1131
1132 static int update_var(int con, struct fb_info *info)
1133 {
1134 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1135 return fb_pan_display(info, &info->var);
1136 return 0;
1137 }
1138
1139 /*
1140 * If no vc is existent yet, just set struct display
1141 */
1142 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1143 int unit)
1144 {
1145 struct display *p = &fb_display[unit];
1146 struct display *t = &fb_display[fg_console];
1147
1148 var->xoffset = var->yoffset = p->yscroll = 0;
1149 if (var_to_display(p, var, info))
1150 return;
1151
1152 p->fontdata = t->fontdata;
1153 p->userfont = t->userfont;
1154 if (p->userfont)
1155 REFCOUNT(p->fontdata)++;
1156 }
1157
1158 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1159 struct vc_data *vc)
1160 {
1161 struct display *p = &fb_display[vc->vc_num], *t;
1162 struct vc_data **default_mode = vc->vc_display_fg;
1163 struct vc_data *svc = *default_mode;
1164 int rows, cols, charcnt = 256;
1165
1166 var->xoffset = var->yoffset = p->yscroll = 0;
1167 if (var_to_display(p, var, info))
1168 return;
1169 t = &fb_display[svc->vc_num];
1170 if (!vc->vc_font.data) {
1171 vc->vc_font.data = p->fontdata = t->fontdata;
1172 vc->vc_font.width = (*default_mode)->vc_font.width;
1173 vc->vc_font.height = (*default_mode)->vc_font.height;
1174 p->userfont = t->userfont;
1175 if (p->userfont)
1176 REFCOUNT(p->fontdata)++;
1177 }
1178 if (p->userfont)
1179 charcnt = FNTCHARCNT(p->fontdata);
1180
1181 vc->vc_can_do_color = (fb_get_color_depth(var) != 1);
1182 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1183 if (charcnt == 256) {
1184 vc->vc_hi_font_mask = 0;
1185 } else {
1186 vc->vc_hi_font_mask = 0x100;
1187 if (vc->vc_can_do_color)
1188 vc->vc_complement_mask <<= 1;
1189 }
1190
1191 if (!*svc->vc_uni_pagedir_loc)
1192 con_set_default_unimap(svc);
1193 if (!*vc->vc_uni_pagedir_loc)
1194 con_copy_unimap(vc, svc);
1195
1196 cols = var->xres / vc->vc_font.width;
1197 rows = var->yres / vc->vc_font.height;
1198 vc_resize(vc, cols, rows);
1199 if (CON_IS_VISIBLE(vc)) {
1200 update_screen(vc);
1201 if (softback_buf) {
1202 int l = fbcon_softback_size / vc->vc_size_row;
1203
1204 if (l > 5)
1205 softback_end = softback_buf + l *
1206 vc->vc_size_row;
1207 else {
1208 /* Smaller scrollback makes no sense, and 0
1209 would screw the operation totally */
1210 softback_top = 0;
1211 }
1212 }
1213 }
1214 }
1215
1216 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1217 {
1218 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1219 struct display *p = &fb_display[vc->vc_num];
1220
1221 p->yscroll += count;
1222 if (p->yscroll >= p->vrows) /* Deal with wrap */
1223 p->yscroll -= p->vrows;
1224 info->var.xoffset = 0;
1225 info->var.yoffset = p->yscroll * vc->vc_font.height;
1226 info->var.vmode |= FB_VMODE_YWRAP;
1227 update_var(vc->vc_num, info);
1228 scrollback_max += count;
1229 if (scrollback_max > scrollback_phys_max)
1230 scrollback_max = scrollback_phys_max;
1231 scrollback_current = 0;
1232 }
1233
1234 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1235 {
1236 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1237 struct display *p = &fb_display[vc->vc_num];
1238
1239 p->yscroll -= count;
1240 if (p->yscroll < 0) /* Deal with wrap */
1241 p->yscroll += p->vrows;
1242 info->var.xoffset = 0;
1243 info->var.yoffset = p->yscroll * vc->vc_font.height;
1244 info->var.vmode |= FB_VMODE_YWRAP;
1245 update_var(vc->vc_num, info);
1246 scrollback_max -= count;
1247 if (scrollback_max < 0)
1248 scrollback_max = 0;
1249 scrollback_current = 0;
1250 }
1251
1252 static __inline__ void ypan_up(struct vc_data *vc, int count)
1253 {
1254 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1255 struct display *p = &fb_display[vc->vc_num];
1256 struct fbcon_ops *ops = info->fbcon_par;
1257
1258 p->yscroll += count;
1259 if (p->yscroll > p->vrows - vc->vc_rows) {
1260 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1261 0, 0, 0, vc->vc_rows, vc->vc_cols);
1262 p->yscroll -= p->vrows - vc->vc_rows;
1263 }
1264 info->var.xoffset = 0;
1265 info->var.yoffset = p->yscroll * vc->vc_font.height;
1266 info->var.vmode &= ~FB_VMODE_YWRAP;
1267 update_var(vc->vc_num, info);
1268 fbcon_clear_margins(vc, 1);
1269 scrollback_max += count;
1270 if (scrollback_max > scrollback_phys_max)
1271 scrollback_max = scrollback_phys_max;
1272 scrollback_current = 0;
1273 }
1274
1275 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1276 {
1277 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1278 struct display *p = &fb_display[vc->vc_num];
1279 int redraw = 0;
1280
1281 p->yscroll += count;
1282 if (p->yscroll > p->vrows - vc->vc_rows) {
1283 p->yscroll -= p->vrows - vc->vc_rows;
1284 redraw = 1;
1285 }
1286
1287 info->var.xoffset = 0;
1288 info->var.yoffset = p->yscroll * vc->vc_font.height;
1289 info->var.vmode &= ~FB_VMODE_YWRAP;
1290 if (redraw)
1291 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1292 update_var(vc->vc_num, info);
1293 fbcon_clear_margins(vc, 1);
1294 scrollback_max += count;
1295 if (scrollback_max > scrollback_phys_max)
1296 scrollback_max = scrollback_phys_max;
1297 scrollback_current = 0;
1298 }
1299
1300 static __inline__ void ypan_down(struct vc_data *vc, int count)
1301 {
1302 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1303 struct display *p = &fb_display[vc->vc_num];
1304 struct fbcon_ops *ops = info->fbcon_par;
1305
1306 p->yscroll -= count;
1307 if (p->yscroll < 0) {
1308 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1309 0, vc->vc_rows, vc->vc_cols);
1310 p->yscroll += p->vrows - vc->vc_rows;
1311 }
1312 info->var.xoffset = 0;
1313 info->var.yoffset = p->yscroll * vc->vc_font.height;
1314 info->var.vmode &= ~FB_VMODE_YWRAP;
1315 update_var(vc->vc_num, info);
1316 fbcon_clear_margins(vc, 1);
1317 scrollback_max -= count;
1318 if (scrollback_max < 0)
1319 scrollback_max = 0;
1320 scrollback_current = 0;
1321 }
1322
1323 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1324 {
1325 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1326 struct display *p = &fb_display[vc->vc_num];
1327 int redraw = 0;
1328
1329 p->yscroll -= count;
1330 if (p->yscroll < 0) {
1331 p->yscroll += p->vrows - vc->vc_rows;
1332 redraw = 1;
1333 }
1334 info->var.xoffset = 0;
1335 info->var.yoffset = p->yscroll * vc->vc_font.height;
1336 info->var.vmode &= ~FB_VMODE_YWRAP;
1337 if (redraw)
1338 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1339 update_var(vc->vc_num, info);
1340 fbcon_clear_margins(vc, 1);
1341 scrollback_max -= count;
1342 if (scrollback_max < 0)
1343 scrollback_max = 0;
1344 scrollback_current = 0;
1345 }
1346
1347 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1348 long delta)
1349 {
1350 int count = vc->vc_rows;
1351 unsigned short *d, *s;
1352 unsigned long n;
1353 int line = 0;
1354
1355 d = (u16 *) softback_curr;
1356 if (d == (u16 *) softback_in)
1357 d = (u16 *) vc->vc_origin;
1358 n = softback_curr + delta * vc->vc_size_row;
1359 softback_lines -= delta;
1360 if (delta < 0) {
1361 if (softback_curr < softback_top && n < softback_buf) {
1362 n += softback_end - softback_buf;
1363 if (n < softback_top) {
1364 softback_lines -=
1365 (softback_top - n) / vc->vc_size_row;
1366 n = softback_top;
1367 }
1368 } else if (softback_curr >= softback_top
1369 && n < softback_top) {
1370 softback_lines -=
1371 (softback_top - n) / vc->vc_size_row;
1372 n = softback_top;
1373 }
1374 } else {
1375 if (softback_curr > softback_in && n >= softback_end) {
1376 n += softback_buf - softback_end;
1377 if (n > softback_in) {
1378 n = softback_in;
1379 softback_lines = 0;
1380 }
1381 } else if (softback_curr <= softback_in && n > softback_in) {
1382 n = softback_in;
1383 softback_lines = 0;
1384 }
1385 }
1386 if (n == softback_curr)
1387 return;
1388 softback_curr = n;
1389 s = (u16 *) softback_curr;
1390 if (s == (u16 *) softback_in)
1391 s = (u16 *) vc->vc_origin;
1392 while (count--) {
1393 unsigned short *start;
1394 unsigned short *le;
1395 unsigned short c;
1396 int x = 0;
1397 unsigned short attr = 1;
1398
1399 start = s;
1400 le = advance_row(s, 1);
1401 do {
1402 c = scr_readw(s);
1403 if (attr != (c & 0xff00)) {
1404 attr = c & 0xff00;
1405 if (s > start) {
1406 fbcon_putcs(vc, start, s - start,
1407 line, x);
1408 x += s - start;
1409 start = s;
1410 }
1411 }
1412 if (c == scr_readw(d)) {
1413 if (s > start) {
1414 fbcon_putcs(vc, start, s - start,
1415 line, x);
1416 x += s - start + 1;
1417 start = s + 1;
1418 } else {
1419 x++;
1420 start++;
1421 }
1422 }
1423 s++;
1424 d++;
1425 } while (s < le);
1426 if (s > start)
1427 fbcon_putcs(vc, start, s - start, line, x);
1428 line++;
1429 if (d == (u16 *) softback_end)
1430 d = (u16 *) softback_buf;
1431 if (d == (u16 *) softback_in)
1432 d = (u16 *) vc->vc_origin;
1433 if (s == (u16 *) softback_end)
1434 s = (u16 *) softback_buf;
1435 if (s == (u16 *) softback_in)
1436 s = (u16 *) vc->vc_origin;
1437 }
1438 }
1439
1440 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1441 int line, int count, int dy)
1442 {
1443 unsigned short *s = (unsigned short *)
1444 (vc->vc_origin + vc->vc_size_row * line);
1445
1446 while (count--) {
1447 unsigned short *start = s;
1448 unsigned short *le = advance_row(s, 1);
1449 unsigned short c;
1450 int x = 0;
1451 unsigned short attr = 1;
1452
1453 do {
1454 c = scr_readw(s);
1455 if (attr != (c & 0xff00)) {
1456 attr = c & 0xff00;
1457 if (s > start) {
1458 fbcon_putcs(vc, start, s - start,
1459 dy, x);
1460 x += s - start;
1461 start = s;
1462 }
1463 }
1464 console_conditional_schedule();
1465 s++;
1466 } while (s < le);
1467 if (s > start)
1468 fbcon_putcs(vc, start, s - start, dy, x);
1469 console_conditional_schedule();
1470 dy++;
1471 }
1472 }
1473
1474 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1475 int line, int count, int offset)
1476 {
1477 unsigned short *d = (unsigned short *)
1478 (vc->vc_origin + vc->vc_size_row * line);
1479 unsigned short *s = d + offset;
1480
1481 while (count--) {
1482 unsigned short *start = s;
1483 unsigned short *le = advance_row(s, 1);
1484 unsigned short c;
1485 int x = 0;
1486 unsigned short attr = 1;
1487
1488 do {
1489 c = scr_readw(s);
1490 if (attr != (c & 0xff00)) {
1491 attr = c & 0xff00;
1492 if (s > start) {
1493 fbcon_putcs(vc, start, s - start,
1494 line, x);
1495 x += s - start;
1496 start = s;
1497 }
1498 }
1499 if (c == scr_readw(d)) {
1500 if (s > start) {
1501 fbcon_putcs(vc, start, s - start,
1502 line, x);
1503 x += s - start + 1;
1504 start = s + 1;
1505 } else {
1506 x++;
1507 start++;
1508 }
1509 }
1510 scr_writew(c, d);
1511 console_conditional_schedule();
1512 s++;
1513 d++;
1514 } while (s < le);
1515 if (s > start)
1516 fbcon_putcs(vc, start, s - start, line, x);
1517 console_conditional_schedule();
1518 if (offset > 0)
1519 line++;
1520 else {
1521 line--;
1522 /* NOTE: We subtract two lines from these pointers */
1523 s -= vc->vc_size_row;
1524 d -= vc->vc_size_row;
1525 }
1526 }
1527 }
1528
1529 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1530 int count)
1531 {
1532 unsigned short *p;
1533
1534 if (vc->vc_num != fg_console)
1535 return;
1536 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1537
1538 while (count) {
1539 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1540 count--;
1541 p = advance_row(p, 1);
1542 softback_in += vc->vc_size_row;
1543 if (softback_in == softback_end)
1544 softback_in = softback_buf;
1545 if (softback_in == softback_top) {
1546 softback_top += vc->vc_size_row;
1547 if (softback_top == softback_end)
1548 softback_top = softback_buf;
1549 }
1550 }
1551 softback_curr = softback_in;
1552 }
1553
1554 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1555 int count)
1556 {
1557 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1558 struct display *p = &fb_display[vc->vc_num];
1559 struct fbcon_ops *ops = info->fbcon_par;
1560 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1561
1562 if (fbcon_is_inactive(vc, info))
1563 return -EINVAL;
1564
1565 fbcon_cursor(vc, CM_ERASE);
1566
1567 /*
1568 * ++Geert: Only use ywrap/ypan if the console is in text mode
1569 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1570 * whole screen (prevents flicker).
1571 */
1572
1573 switch (dir) {
1574 case SM_UP:
1575 if (count > vc->vc_rows) /* Maximum realistic size */
1576 count = vc->vc_rows;
1577 if (softback_top)
1578 fbcon_softback_note(vc, t, count);
1579 if (logo_shown >= 0)
1580 goto redraw_up;
1581 switch (p->scrollmode) {
1582 case SCROLL_MOVE:
1583 ops->bmove(vc, info, t + count, 0, t, 0,
1584 b - t - count, vc->vc_cols);
1585 ops->clear(vc, info, b - count, 0, count,
1586 vc->vc_cols);
1587 break;
1588
1589 case SCROLL_WRAP_MOVE:
1590 if (b - t - count > 3 * vc->vc_rows >> 2) {
1591 if (t > 0)
1592 fbcon_bmove(vc, 0, 0, count, 0, t,
1593 vc->vc_cols);
1594 ywrap_up(vc, count);
1595 if (vc->vc_rows - b > 0)
1596 fbcon_bmove(vc, b - count, 0, b, 0,
1597 vc->vc_rows - b,
1598 vc->vc_cols);
1599 } else if (info->flags & FBINFO_READS_FAST)
1600 fbcon_bmove(vc, t + count, 0, t, 0,
1601 b - t - count, vc->vc_cols);
1602 else
1603 goto redraw_up;
1604 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1605 break;
1606
1607 case SCROLL_PAN_REDRAW:
1608 if ((p->yscroll + count <=
1609 2 * (p->vrows - vc->vc_rows))
1610 && ((!scroll_partial && (b - t == vc->vc_rows))
1611 || (scroll_partial
1612 && (b - t - count >
1613 3 * vc->vc_rows >> 2)))) {
1614 if (t > 0)
1615 fbcon_redraw_move(vc, p, 0, t, count);
1616 ypan_up_redraw(vc, t, count);
1617 if (vc->vc_rows - b > 0)
1618 fbcon_redraw_move(vc, p, b - count,
1619 vc->vc_rows - b, b);
1620 } else
1621 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1622 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1623 break;
1624
1625 case SCROLL_PAN_MOVE:
1626 if ((p->yscroll + count <=
1627 2 * (p->vrows - vc->vc_rows))
1628 && ((!scroll_partial && (b - t == vc->vc_rows))
1629 || (scroll_partial
1630 && (b - t - count >
1631 3 * vc->vc_rows >> 2)))) {
1632 if (t > 0)
1633 fbcon_bmove(vc, 0, 0, count, 0, t,
1634 vc->vc_cols);
1635 ypan_up(vc, count);
1636 if (vc->vc_rows - b > 0)
1637 fbcon_bmove(vc, b - count, 0, b, 0,
1638 vc->vc_rows - b,
1639 vc->vc_cols);
1640 } else if (info->flags & FBINFO_READS_FAST)
1641 fbcon_bmove(vc, t + count, 0, t, 0,
1642 b - t - count, vc->vc_cols);
1643 else
1644 goto redraw_up;
1645 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1646 break;
1647
1648 case SCROLL_REDRAW:
1649 redraw_up:
1650 fbcon_redraw(vc, p, t, b - t - count,
1651 count * vc->vc_cols);
1652 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1653 scr_memsetw((unsigned short *) (vc->vc_origin +
1654 vc->vc_size_row *
1655 (b - count)),
1656 vc->vc_video_erase_char,
1657 vc->vc_size_row * count);
1658 return 1;
1659 }
1660 break;
1661
1662 case SM_DOWN:
1663 if (count > vc->vc_rows) /* Maximum realistic size */
1664 count = vc->vc_rows;
1665 switch (p->scrollmode) {
1666 case SCROLL_MOVE:
1667 ops->bmove(vc, info, t, 0, t + count, 0,
1668 b - t - count, vc->vc_cols);
1669 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1670 break;
1671
1672 case SCROLL_WRAP_MOVE:
1673 if (b - t - count > 3 * vc->vc_rows >> 2) {
1674 if (vc->vc_rows - b > 0)
1675 fbcon_bmove(vc, b, 0, b - count, 0,
1676 vc->vc_rows - b,
1677 vc->vc_cols);
1678 ywrap_down(vc, count);
1679 if (t > 0)
1680 fbcon_bmove(vc, count, 0, 0, 0, t,
1681 vc->vc_cols);
1682 } else if (info->flags & FBINFO_READS_FAST)
1683 fbcon_bmove(vc, t, 0, t + count, 0,
1684 b - t - count, vc->vc_cols);
1685 else
1686 goto redraw_down;
1687 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1688 break;
1689
1690 case SCROLL_PAN_MOVE:
1691 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1692 && ((!scroll_partial && (b - t == vc->vc_rows))
1693 || (scroll_partial
1694 && (b - t - count >
1695 3 * vc->vc_rows >> 2)))) {
1696 if (vc->vc_rows - b > 0)
1697 fbcon_bmove(vc, b, 0, b - count, 0,
1698 vc->vc_rows - b,
1699 vc->vc_cols);
1700 ypan_down(vc, count);
1701 if (t > 0)
1702 fbcon_bmove(vc, count, 0, 0, 0, t,
1703 vc->vc_cols);
1704 } else if (info->flags & FBINFO_READS_FAST)
1705 fbcon_bmove(vc, t, 0, t + count, 0,
1706 b - t - count, vc->vc_cols);
1707 else
1708 goto redraw_down;
1709 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1710 break;
1711
1712 case SCROLL_PAN_REDRAW:
1713 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1714 && ((!scroll_partial && (b - t == vc->vc_rows))
1715 || (scroll_partial
1716 && (b - t - count >
1717 3 * vc->vc_rows >> 2)))) {
1718 if (vc->vc_rows - b > 0)
1719 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1720 b - count);
1721 ypan_down_redraw(vc, t, count);
1722 if (t > 0)
1723 fbcon_redraw_move(vc, p, count, t, 0);
1724 } else
1725 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1726 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1727 break;
1728
1729 case SCROLL_REDRAW:
1730 redraw_down:
1731 fbcon_redraw(vc, p, b - 1, b - t - count,
1732 -count * vc->vc_cols);
1733 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1734 scr_memsetw((unsigned short *) (vc->vc_origin +
1735 vc->vc_size_row *
1736 t),
1737 vc->vc_video_erase_char,
1738 vc->vc_size_row * count);
1739 return 1;
1740 }
1741 }
1742 return 0;
1743 }
1744
1745
1746 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1747 int height, int width)
1748 {
1749 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1750 struct display *p = &fb_display[vc->vc_num];
1751
1752 if (fbcon_is_inactive(vc, info))
1753 return;
1754
1755 if (!width || !height)
1756 return;
1757
1758 /* Split blits that cross physical y_wrap case.
1759 * Pathological case involves 4 blits, better to use recursive
1760 * code rather than unrolled case
1761 *
1762 * Recursive invocations don't need to erase the cursor over and
1763 * over again, so we use fbcon_bmove_rec()
1764 */
1765 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1766 p->vrows - p->yscroll);
1767 }
1768
1769 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1770 int dy, int dx, int height, int width, u_int y_break)
1771 {
1772 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1773 struct fbcon_ops *ops = info->fbcon_par;
1774 u_int b;
1775
1776 if (sy < y_break && sy + height > y_break) {
1777 b = y_break - sy;
1778 if (dy < sy) { /* Avoid trashing self */
1779 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1780 y_break);
1781 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1782 height - b, width, y_break);
1783 } else {
1784 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1785 height - b, width, y_break);
1786 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1787 y_break);
1788 }
1789 return;
1790 }
1791
1792 if (dy < y_break && dy + height > y_break) {
1793 b = y_break - dy;
1794 if (dy < sy) { /* Avoid trashing self */
1795 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1796 y_break);
1797 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1798 height - b, width, y_break);
1799 } else {
1800 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1801 height - b, width, y_break);
1802 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1803 y_break);
1804 }
1805 return;
1806 }
1807 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1808 height, width);
1809 }
1810
1811 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1812 struct vc_data *vc)
1813 {
1814 int fh = vc->vc_font.height;
1815 int cap = info->flags;
1816 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1817 && divides(info->fix.ypanstep, vc->vc_font.height)
1818 && info->var.yres_virtual > info->var.yres;
1819 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1820 && divides(info->fix.ywrapstep, vc->vc_font.height)
1821 && divides(vc->vc_font.height, info->var.yres_virtual);
1822 int reading_fast = cap & FBINFO_READS_FAST;
1823 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1824 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1825
1826 p->vrows = info->var.yres_virtual/fh;
1827 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1828 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1829 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1830 info->var.yres % fh))
1831 p->vrows--;
1832
1833 if (good_wrap || good_pan) {
1834 if (reading_fast || fast_copyarea)
1835 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1836 else
1837 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1838 SCROLL_PAN_REDRAW;
1839 } else {
1840 if (reading_fast || (fast_copyarea && !fast_imageblit))
1841 p->scrollmode = SCROLL_MOVE;
1842 else
1843 p->scrollmode = SCROLL_REDRAW;
1844 }
1845 }
1846
1847 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1848 unsigned int height)
1849 {
1850 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1851 struct display *p = &fb_display[vc->vc_num];
1852 struct fb_var_screeninfo var = info->var;
1853 int x_diff, y_diff;
1854 int fw = vc->vc_font.width;
1855 int fh = vc->vc_font.height;
1856
1857 var.xres = width * fw;
1858 var.yres = height * fh;
1859 x_diff = info->var.xres - var.xres;
1860 y_diff = info->var.yres - var.yres;
1861 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1862 struct fb_videomode *mode;
1863
1864 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1865 mode = fb_find_best_mode(&var, &info->modelist);
1866 if (mode == NULL)
1867 return -EINVAL;
1868 fb_videomode_to_var(&var, mode);
1869 if (width > var.xres/fw || height > var.yres/fh)
1870 return -EINVAL;
1871 /*
1872 * The following can probably have any value... Do we need to
1873 * set all of them?
1874 */
1875 var.bits_per_pixel = p->bits_per_pixel;
1876 var.xres_virtual = p->xres_virtual;
1877 var.yres_virtual = p->yres_virtual;
1878 var.accel_flags = p->accel_flags;
1879 var.width = p->width;
1880 var.height = p->height;
1881 var.red = p->red;
1882 var.green = p->green;
1883 var.blue = p->blue;
1884 var.transp = p->transp;
1885 var.nonstd = p->nonstd;
1886
1887 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1888 if (CON_IS_VISIBLE(vc)) {
1889 var.activate = FB_ACTIVATE_NOW |
1890 FB_ACTIVATE_FORCE;
1891 fb_set_var(info, &var);
1892 }
1893 var_to_display(p, &info->var, info);
1894 }
1895 updatescrollmode(p, info, vc);
1896 return 0;
1897 }
1898
1899 static int fbcon_switch(struct vc_data *vc)
1900 {
1901 struct fb_info *info;
1902 struct display *p = &fb_display[vc->vc_num];
1903 struct fb_var_screeninfo var;
1904 int i, prev_console;
1905
1906 info = registered_fb[con2fb_map[vc->vc_num]];
1907
1908 if (softback_top) {
1909 int l = fbcon_softback_size / vc->vc_size_row;
1910 if (softback_lines)
1911 fbcon_set_origin(vc);
1912 softback_top = softback_curr = softback_in = softback_buf;
1913 softback_lines = 0;
1914
1915 if (l > 5)
1916 softback_end = softback_buf + l * vc->vc_size_row;
1917 else {
1918 /* Smaller scrollback makes no sense, and 0 would screw
1919 the operation totally */
1920 softback_top = 0;
1921 }
1922 }
1923
1924 if (logo_shown >= 0) {
1925 struct vc_data *conp2 = vc_cons[logo_shown].d;
1926
1927 if (conp2->vc_top == logo_lines
1928 && conp2->vc_bottom == conp2->vc_rows)
1929 conp2->vc_top = 0;
1930 logo_shown = FBCON_LOGO_CANSHOW;
1931 }
1932
1933 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
1934
1935 /*
1936 * FIXME: If we have multiple fbdev's loaded, we need to
1937 * update all info->currcon. Perhaps, we can place this
1938 * in a centralized structure, but this might break some
1939 * drivers.
1940 *
1941 * info->currcon = vc->vc_num;
1942 */
1943 for (i = 0; i < FB_MAX; i++) {
1944 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1945 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1946
1947 ops->currcon = vc->vc_num;
1948 }
1949 }
1950 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1951 display_to_var(&var, p);
1952 var.activate = FB_ACTIVATE_NOW;
1953
1954 /*
1955 * make sure we don't unnecessarily trip the memcmp()
1956 * in fb_set_var()
1957 */
1958 info->var.activate = var.activate;
1959 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1960 fb_set_var(info, &var);
1961
1962 if (prev_console != -1 &&
1963 registered_fb[con2fb_map[prev_console]] != info &&
1964 info->fbops->fb_set_par)
1965 info->fbops->fb_set_par(info);
1966
1967 set_blitting_type(vc, info, p);
1968 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1969
1970 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
1971 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1972 updatescrollmode(p, info, vc);
1973
1974 switch (p->scrollmode) {
1975 case SCROLL_WRAP_MOVE:
1976 scrollback_phys_max = p->vrows - vc->vc_rows;
1977 break;
1978 case SCROLL_PAN_MOVE:
1979 case SCROLL_PAN_REDRAW:
1980 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
1981 if (scrollback_phys_max < 0)
1982 scrollback_phys_max = 0;
1983 break;
1984 default:
1985 scrollback_phys_max = 0;
1986 break;
1987 }
1988 scrollback_max = 0;
1989 scrollback_current = 0;
1990
1991 update_var(vc->vc_num, info);
1992 fbcon_set_palette(vc, color_table);
1993 fbcon_clear_margins(vc, 0);
1994
1995 if (logo_shown == FBCON_LOGO_DRAW) {
1996
1997 logo_shown = fg_console;
1998 /* This is protected above by initmem_freed */
1999 fb_show_logo(info);
2000 update_region(vc,
2001 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2002 vc->vc_size_row * (vc->vc_bottom -
2003 vc->vc_top) / 2);
2004 return 0;
2005 }
2006 return 1;
2007 }
2008
2009 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2010 int blank)
2011 {
2012 if (blank) {
2013 unsigned short charmask = vc->vc_hi_font_mask ?
2014 0x1ff : 0xff;
2015 unsigned short oldc;
2016
2017 oldc = vc->vc_video_erase_char;
2018 vc->vc_video_erase_char &= charmask;
2019 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2020 vc->vc_video_erase_char = oldc;
2021 }
2022 }
2023
2024 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2025 {
2026 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2027 struct fbcon_ops *ops = info->fbcon_par;
2028
2029 if (mode_switch) {
2030 struct fb_var_screeninfo var = info->var;
2031
2032 ops->graphics = 1;
2033
2034 if (!blank) {
2035 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2036 fb_set_var(info, &var);
2037 ops->graphics = 0;
2038 }
2039 }
2040
2041 if (!fbcon_is_inactive(vc, info)) {
2042 if (ops->blank_state != blank) {
2043 ops->blank_state = blank;
2044 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2045 ops->cursor_flash = (!blank);
2046
2047 if (fb_blank(info, blank))
2048 fbcon_generic_blank(vc, info, blank);
2049 }
2050
2051 if (!blank)
2052 update_screen(vc);
2053 }
2054
2055 return 0;
2056 }
2057
2058 static void fbcon_free_font(struct display *p)
2059 {
2060 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2061 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2062 p->fontdata = NULL;
2063 p->userfont = 0;
2064 }
2065
2066 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2067 {
2068 u8 *fontdata = vc->vc_font.data;
2069 u8 *data = font->data;
2070 int i, j;
2071
2072 font->width = vc->vc_font.width;
2073 font->height = vc->vc_font.height;
2074 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2075 if (!font->data)
2076 return 0;
2077
2078 if (font->width <= 8) {
2079 j = vc->vc_font.height;
2080 for (i = 0; i < font->charcount; i++) {
2081 memcpy(data, fontdata, j);
2082 memset(data + j, 0, 32 - j);
2083 data += 32;
2084 fontdata += j;
2085 }
2086 } else if (font->width <= 16) {
2087 j = vc->vc_font.height * 2;
2088 for (i = 0; i < font->charcount; i++) {
2089 memcpy(data, fontdata, j);
2090 memset(data + j, 0, 64 - j);
2091 data += 64;
2092 fontdata += j;
2093 }
2094 } else if (font->width <= 24) {
2095 for (i = 0; i < font->charcount; i++) {
2096 for (j = 0; j < vc->vc_font.height; j++) {
2097 *data++ = fontdata[0];
2098 *data++ = fontdata[1];
2099 *data++ = fontdata[2];
2100 fontdata += sizeof(u32);
2101 }
2102 memset(data, 0, 3 * (32 - j));
2103 data += 3 * (32 - j);
2104 }
2105 } else {
2106 j = vc->vc_font.height * 4;
2107 for (i = 0; i < font->charcount; i++) {
2108 memcpy(data, fontdata, j);
2109 memset(data + j, 0, 128 - j);
2110 data += 128;
2111 fontdata += j;
2112 }
2113 }
2114 return 0;
2115 }
2116
2117 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2118 u8 * data, int userfont)
2119 {
2120 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2121 struct display *p = &fb_display[vc->vc_num];
2122 int resize;
2123 int cnt;
2124 char *old_data = NULL;
2125
2126 if (CON_IS_VISIBLE(vc) && softback_lines)
2127 fbcon_set_origin(vc);
2128
2129 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2130 if (p->userfont)
2131 old_data = vc->vc_font.data;
2132 if (userfont)
2133 cnt = FNTCHARCNT(data);
2134 else
2135 cnt = 256;
2136 vc->vc_font.data = p->fontdata = data;
2137 if ((p->userfont = userfont))
2138 REFCOUNT(data)++;
2139 vc->vc_font.width = w;
2140 vc->vc_font.height = h;
2141 if (vc->vc_hi_font_mask && cnt == 256) {
2142 vc->vc_hi_font_mask = 0;
2143 if (vc->vc_can_do_color) {
2144 vc->vc_complement_mask >>= 1;
2145 vc->vc_s_complement_mask >>= 1;
2146 }
2147
2148 /* ++Edmund: reorder the attribute bits */
2149 if (vc->vc_can_do_color) {
2150 unsigned short *cp =
2151 (unsigned short *) vc->vc_origin;
2152 int count = vc->vc_screenbuf_size / 2;
2153 unsigned short c;
2154 for (; count > 0; count--, cp++) {
2155 c = scr_readw(cp);
2156 scr_writew(((c & 0xfe00) >> 1) |
2157 (c & 0xff), cp);
2158 }
2159 c = vc->vc_video_erase_char;
2160 vc->vc_video_erase_char =
2161 ((c & 0xfe00) >> 1) | (c & 0xff);
2162 vc->vc_attr >>= 1;
2163 }
2164 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2165 vc->vc_hi_font_mask = 0x100;
2166 if (vc->vc_can_do_color) {
2167 vc->vc_complement_mask <<= 1;
2168 vc->vc_s_complement_mask <<= 1;
2169 }
2170
2171 /* ++Edmund: reorder the attribute bits */
2172 {
2173 unsigned short *cp =
2174 (unsigned short *) vc->vc_origin;
2175 int count = vc->vc_screenbuf_size / 2;
2176 unsigned short c;
2177 for (; count > 0; count--, cp++) {
2178 unsigned short newc;
2179 c = scr_readw(cp);
2180 if (vc->vc_can_do_color)
2181 newc =
2182 ((c & 0xff00) << 1) | (c &
2183 0xff);
2184 else
2185 newc = c & ~0x100;
2186 scr_writew(newc, cp);
2187 }
2188 c = vc->vc_video_erase_char;
2189 if (vc->vc_can_do_color) {
2190 vc->vc_video_erase_char =
2191 ((c & 0xff00) << 1) | (c & 0xff);
2192 vc->vc_attr <<= 1;
2193 } else
2194 vc->vc_video_erase_char = c & ~0x100;
2195 }
2196
2197 }
2198
2199 if (resize) {
2200 /* reset wrap/pan */
2201 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2202 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2203 if (CON_IS_VISIBLE(vc) && softback_buf) {
2204 int l = fbcon_softback_size / vc->vc_size_row;
2205 if (l > 5)
2206 softback_end =
2207 softback_buf + l * vc->vc_size_row;
2208 else {
2209 /* Smaller scrollback makes no sense, and 0 would screw
2210 the operation totally */
2211 softback_top = 0;
2212 }
2213 }
2214 } else if (CON_IS_VISIBLE(vc)
2215 && vc->vc_mode == KD_TEXT) {
2216 fbcon_clear_margins(vc, 0);
2217 update_screen(vc);
2218 }
2219
2220 if (old_data && (--REFCOUNT(old_data) == 0))
2221 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2222 return 0;
2223 }
2224
2225 static int fbcon_copy_font(struct vc_data *vc, int con)
2226 {
2227 struct display *od = &fb_display[con];
2228 struct console_font *f = &vc->vc_font;
2229
2230 if (od->fontdata == f->data)
2231 return 0; /* already the same font... */
2232 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2233 }
2234
2235 /*
2236 * User asked to set font; we are guaranteed that
2237 * a) width and height are in range 1..32
2238 * b) charcount does not exceed 512
2239 * but lets not assume that, since someone might someday want to use larger
2240 * fonts. And charcount of 512 is small for unicode support.
2241 *
2242 * However, user space gives the font in 32 rows , regardless of
2243 * actual font height. So a new API is needed if support for larger fonts
2244 * is ever implemented.
2245 */
2246
2247 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2248 {
2249 unsigned charcount = font->charcount;
2250 int w = font->width;
2251 int h = font->height;
2252 int size;
2253 int i, csum;
2254 u8 *new_data, *data = font->data;
2255 int pitch = (font->width+7) >> 3;
2256
2257 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2258 * If not this check should be changed to charcount < 256 */
2259 if (charcount != 256 && charcount != 512)
2260 return -EINVAL;
2261
2262 size = h * pitch * charcount;
2263
2264 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2265
2266 if (!new_data)
2267 return -ENOMEM;
2268
2269 new_data += FONT_EXTRA_WORDS * sizeof(int);
2270 FNTSIZE(new_data) = size;
2271 FNTCHARCNT(new_data) = charcount;
2272 REFCOUNT(new_data) = 0; /* usage counter */
2273 for (i=0; i< charcount; i++) {
2274 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2275 }
2276
2277 /* Since linux has a nice crc32 function use it for counting font
2278 * checksums. */
2279 csum = crc32(0, new_data, size);
2280
2281 FNTSUM(new_data) = csum;
2282 /* Check if the same font is on some other console already */
2283 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2284 struct vc_data *tmp = vc_cons[i].d;
2285
2286 if (fb_display[i].userfont &&
2287 fb_display[i].fontdata &&
2288 FNTSUM(fb_display[i].fontdata) == csum &&
2289 FNTSIZE(fb_display[i].fontdata) == size &&
2290 tmp->vc_font.width == w &&
2291 !memcmp(fb_display[i].fontdata, new_data, size)) {
2292 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2293 new_data = fb_display[i].fontdata;
2294 break;
2295 }
2296 }
2297 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2298 }
2299
2300 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2301 {
2302 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2303 struct font_desc *f;
2304
2305 if (!name)
2306 f = get_default_font(info->var.xres, info->var.yres);
2307 else if (!(f = find_font(name)))
2308 return -ENOENT;
2309
2310 font->width = f->width;
2311 font->height = f->height;
2312 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2313 }
2314
2315 static u16 palette_red[16];
2316 static u16 palette_green[16];
2317 static u16 palette_blue[16];
2318
2319 static struct fb_cmap palette_cmap = {
2320 0, 16, palette_red, palette_green, palette_blue, NULL
2321 };
2322
2323 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2324 {
2325 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2326 int i, j, k, depth;
2327 u8 val;
2328
2329 if (fbcon_is_inactive(vc, info))
2330 return -EINVAL;
2331
2332 if (!CON_IS_VISIBLE(vc))
2333 return 0;
2334
2335 depth = fb_get_color_depth(&info->var);
2336 if (depth > 3) {
2337 for (i = j = 0; i < 16; i++) {
2338 k = table[i];
2339 val = vc->vc_palette[j++];
2340 palette_red[k] = (val << 8) | val;
2341 val = vc->vc_palette[j++];
2342 palette_green[k] = (val << 8) | val;
2343 val = vc->vc_palette[j++];
2344 palette_blue[k] = (val << 8) | val;
2345 }
2346 palette_cmap.len = 16;
2347 palette_cmap.start = 0;
2348 /*
2349 * If framebuffer is capable of less than 16 colors,
2350 * use default palette of fbcon.
2351 */
2352 } else
2353 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2354
2355 return fb_set_cmap(&palette_cmap, info);
2356 }
2357
2358 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2359 {
2360 unsigned long p;
2361 int line;
2362
2363 if (vc->vc_num != fg_console || !softback_lines)
2364 return (u16 *) (vc->vc_origin + offset);
2365 line = offset / vc->vc_size_row;
2366 if (line >= softback_lines)
2367 return (u16 *) (vc->vc_origin + offset -
2368 softback_lines * vc->vc_size_row);
2369 p = softback_curr + offset;
2370 if (p >= softback_end)
2371 p += softback_buf - softback_end;
2372 return (u16 *) p;
2373 }
2374
2375 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2376 int *px, int *py)
2377 {
2378 unsigned long ret;
2379 int x, y;
2380
2381 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2382 unsigned long offset = (pos - vc->vc_origin) / 2;
2383
2384 x = offset % vc->vc_cols;
2385 y = offset / vc->vc_cols;
2386 if (vc->vc_num == fg_console)
2387 y += softback_lines;
2388 ret = pos + (vc->vc_cols - x) * 2;
2389 } else if (vc->vc_num == fg_console && softback_lines) {
2390 unsigned long offset = pos - softback_curr;
2391
2392 if (pos < softback_curr)
2393 offset += softback_end - softback_buf;
2394 offset /= 2;
2395 x = offset % vc->vc_cols;
2396 y = offset / vc->vc_cols;
2397 ret = pos + (vc->vc_cols - x) * 2;
2398 if (ret == softback_end)
2399 ret = softback_buf;
2400 if (ret == softback_in)
2401 ret = vc->vc_origin;
2402 } else {
2403 /* Should not happen */
2404 x = y = 0;
2405 ret = vc->vc_origin;
2406 }
2407 if (px)
2408 *px = x;
2409 if (py)
2410 *py = y;
2411 return ret;
2412 }
2413
2414 /* As we might be inside of softback, we may work with non-contiguous buffer,
2415 that's why we have to use a separate routine. */
2416 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2417 {
2418 while (cnt--) {
2419 u16 a = scr_readw(p);
2420 if (!vc->vc_can_do_color)
2421 a ^= 0x0800;
2422 else if (vc->vc_hi_font_mask == 0x100)
2423 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2424 (((a) & 0x0e00) << 4);
2425 else
2426 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2427 (((a) & 0x0700) << 4);
2428 scr_writew(a, p++);
2429 if (p == (u16 *) softback_end)
2430 p = (u16 *) softback_buf;
2431 if (p == (u16 *) softback_in)
2432 p = (u16 *) vc->vc_origin;
2433 }
2434 }
2435
2436 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2437 {
2438 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2439 struct display *p = &fb_display[fg_console];
2440 int offset, limit, scrollback_old;
2441
2442 if (softback_top) {
2443 if (vc->vc_num != fg_console)
2444 return 0;
2445 if (vc->vc_mode != KD_TEXT || !lines)
2446 return 0;
2447 if (logo_shown >= 0) {
2448 struct vc_data *conp2 = vc_cons[logo_shown].d;
2449
2450 if (conp2->vc_top == logo_lines
2451 && conp2->vc_bottom == conp2->vc_rows)
2452 conp2->vc_top = 0;
2453 if (logo_shown == vc->vc_num) {
2454 unsigned long p, q;
2455 int i;
2456
2457 p = softback_in;
2458 q = vc->vc_origin +
2459 logo_lines * vc->vc_size_row;
2460 for (i = 0; i < logo_lines; i++) {
2461 if (p == softback_top)
2462 break;
2463 if (p == softback_buf)
2464 p = softback_end;
2465 p -= vc->vc_size_row;
2466 q -= vc->vc_size_row;
2467 scr_memcpyw((u16 *) q, (u16 *) p,
2468 vc->vc_size_row);
2469 }
2470 softback_in = p;
2471 update_region(vc, vc->vc_origin,
2472 logo_lines * vc->vc_cols);
2473 }
2474 logo_shown = FBCON_LOGO_CANSHOW;
2475 }
2476 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2477 fbcon_redraw_softback(vc, p, lines);
2478 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2479 return 0;
2480 }
2481
2482 if (!scrollback_phys_max)
2483 return -ENOSYS;
2484
2485 scrollback_old = scrollback_current;
2486 scrollback_current -= lines;
2487 if (scrollback_current < 0)
2488 scrollback_current = 0;
2489 else if (scrollback_current > scrollback_max)
2490 scrollback_current = scrollback_max;
2491 if (scrollback_current == scrollback_old)
2492 return 0;
2493
2494 if (fbcon_is_inactive(vc, info))
2495 return 0;
2496
2497 fbcon_cursor(vc, CM_ERASE);
2498
2499 offset = p->yscroll - scrollback_current;
2500 limit = p->vrows;
2501 switch (p->scrollmode) {
2502 case SCROLL_WRAP_MOVE:
2503 info->var.vmode |= FB_VMODE_YWRAP;
2504 break;
2505 case SCROLL_PAN_MOVE:
2506 case SCROLL_PAN_REDRAW:
2507 limit -= vc->vc_rows;
2508 info->var.vmode &= ~FB_VMODE_YWRAP;
2509 break;
2510 }
2511 if (offset < 0)
2512 offset += limit;
2513 else if (offset >= limit)
2514 offset -= limit;
2515 info->var.xoffset = 0;
2516 info->var.yoffset = offset * vc->vc_font.height;
2517 update_var(vc->vc_num, info);
2518 if (!scrollback_current)
2519 fbcon_cursor(vc, CM_DRAW);
2520 return 0;
2521 }
2522
2523 static int fbcon_set_origin(struct vc_data *vc)
2524 {
2525 if (softback_lines)
2526 fbcon_scrolldelta(vc, softback_lines);
2527 return 0;
2528 }
2529
2530 static void fbcon_suspended(struct fb_info *info)
2531 {
2532 struct vc_data *vc = NULL;
2533 struct fbcon_ops *ops = info->fbcon_par;
2534
2535 if (!ops || ops->currcon < 0)
2536 return;
2537 vc = vc_cons[ops->currcon].d;
2538
2539 /* Clear cursor, restore saved data */
2540 fbcon_cursor(vc, CM_ERASE);
2541 }
2542
2543 static void fbcon_resumed(struct fb_info *info)
2544 {
2545 struct vc_data *vc;
2546 struct fbcon_ops *ops = info->fbcon_par;
2547
2548 if (!ops || ops->currcon < 0)
2549 return;
2550 vc = vc_cons[ops->currcon].d;
2551
2552 update_screen(vc);
2553 }
2554
2555 static void fbcon_modechanged(struct fb_info *info)
2556 {
2557 struct fbcon_ops *ops = info->fbcon_par;
2558 struct vc_data *vc;
2559 struct display *p;
2560 int rows, cols;
2561
2562 if (!ops || ops->currcon < 0)
2563 return;
2564 vc = vc_cons[ops->currcon].d;
2565 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2566 return;
2567
2568 p = &fb_display[vc->vc_num];
2569
2570 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2571
2572 if (CON_IS_VISIBLE(vc)) {
2573 var_to_display(p, &info->var, info);
2574 cols = info->var.xres / vc->vc_font.width;
2575 rows = info->var.yres / vc->vc_font.height;
2576 vc_resize(vc, cols, rows);
2577 updatescrollmode(p, info, vc);
2578 scrollback_max = 0;
2579 scrollback_current = 0;
2580 update_var(vc->vc_num, info);
2581 fbcon_set_palette(vc, color_table);
2582 update_screen(vc);
2583 if (softback_buf) {
2584 int l = fbcon_softback_size / vc->vc_size_row;
2585 if (l > 5)
2586 softback_end = softback_buf + l * vc->vc_size_row;
2587 else {
2588 /* Smaller scrollback makes no sense, and 0
2589 would screw the operation totally */
2590 softback_top = 0;
2591 }
2592 }
2593 }
2594 }
2595
2596 static int fbcon_mode_deleted(struct fb_info *info,
2597 struct fb_videomode *mode)
2598 {
2599 struct fb_info *fb_info;
2600 struct display *p;
2601 int i, j, found = 0;
2602
2603 /* before deletion, ensure that mode is not in use */
2604 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2605 j = con2fb_map[i];
2606 if (j == -1)
2607 continue;
2608 fb_info = registered_fb[j];
2609 if (fb_info != info)
2610 continue;
2611 p = &fb_display[i];
2612 if (!p || !p->mode)
2613 continue;
2614 if (fb_mode_is_equal(p->mode, mode)) {
2615 found = 1;
2616 break;
2617 }
2618 }
2619 return found;
2620 }
2621
2622 static int fbcon_fb_registered(int idx)
2623 {
2624 int ret = 0, i;
2625
2626 if (info_idx == -1) {
2627 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2628 if (con2fb_map_boot[i] == idx) {
2629 info_idx = idx;
2630 break;
2631 }
2632 }
2633 if (info_idx != -1)
2634 ret = fbcon_takeover(1);
2635 } else {
2636 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2637 if (con2fb_map_boot[i] == idx)
2638 set_con2fb_map(i, idx, 0);
2639 }
2640 }
2641
2642 return ret;
2643 }
2644
2645 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2646 {
2647 struct fbcon_ops *ops = info->fbcon_par;
2648 struct vc_data *vc;
2649
2650 if (!ops || ops->currcon < 0)
2651 return;
2652
2653 vc = vc_cons[ops->currcon].d;
2654 if (vc->vc_mode != KD_TEXT ||
2655 registered_fb[con2fb_map[ops->currcon]] != info)
2656 return;
2657
2658 if (CON_IS_VISIBLE(vc)) {
2659 if (blank)
2660 do_blank_screen(0);
2661 else
2662 do_unblank_screen(0);
2663 }
2664 ops->blank_state = blank;
2665 }
2666
2667 static void fbcon_new_modelist(struct fb_info *info)
2668 {
2669 int i;
2670 struct vc_data *vc;
2671 struct fb_var_screeninfo var;
2672 struct fb_videomode *mode;
2673
2674 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2675 if (registered_fb[con2fb_map[i]] != info)
2676 continue;
2677 if (!fb_display[i].mode)
2678 continue;
2679 vc = vc_cons[i].d;
2680 display_to_var(&var, &fb_display[i]);
2681 mode = fb_find_nearest_mode(&var, &info->modelist);
2682 fb_videomode_to_var(&var, mode);
2683
2684 if (vc)
2685 fbcon_set_disp(info, &var, vc);
2686 else
2687 fbcon_preset_disp(info, &var, i);
2688
2689 }
2690 }
2691
2692 static int fbcon_event_notify(struct notifier_block *self,
2693 unsigned long action, void *data)
2694 {
2695 struct fb_event *event = data;
2696 struct fb_info *info = event->info;
2697 struct fb_videomode *mode;
2698 struct fb_con2fbmap *con2fb;
2699 int ret = 0;
2700
2701 switch(action) {
2702 case FB_EVENT_SUSPEND:
2703 fbcon_suspended(info);
2704 break;
2705 case FB_EVENT_RESUME:
2706 fbcon_resumed(info);
2707 break;
2708 case FB_EVENT_MODE_CHANGE:
2709 fbcon_modechanged(info);
2710 break;
2711 case FB_EVENT_MODE_DELETE:
2712 mode = event->data;
2713 ret = fbcon_mode_deleted(info, mode);
2714 break;
2715 case FB_EVENT_FB_REGISTERED:
2716 ret = fbcon_fb_registered(info->node);
2717 break;
2718 case FB_EVENT_SET_CONSOLE_MAP:
2719 con2fb = event->data;
2720 ret = set_con2fb_map(con2fb->console - 1,
2721 con2fb->framebuffer, 1);
2722 break;
2723 case FB_EVENT_GET_CONSOLE_MAP:
2724 con2fb = event->data;
2725 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2726 break;
2727 case FB_EVENT_BLANK:
2728 fbcon_fb_blanked(info, *(int *)event->data);
2729 break;
2730 case FB_EVENT_NEW_MODELIST:
2731 fbcon_new_modelist(info);
2732 break;
2733 }
2734
2735 return ret;
2736 }
2737
2738 /*
2739 * The console `switch' structure for the frame buffer based console
2740 */
2741
2742 static const struct consw fb_con = {
2743 .owner = THIS_MODULE,
2744 .con_startup = fbcon_startup,
2745 .con_init = fbcon_init,
2746 .con_deinit = fbcon_deinit,
2747 .con_clear = fbcon_clear,
2748 .con_putc = fbcon_putc,
2749 .con_putcs = fbcon_putcs,
2750 .con_cursor = fbcon_cursor,
2751 .con_scroll = fbcon_scroll,
2752 .con_bmove = fbcon_bmove,
2753 .con_switch = fbcon_switch,
2754 .con_blank = fbcon_blank,
2755 .con_font_set = fbcon_set_font,
2756 .con_font_get = fbcon_get_font,
2757 .con_font_default = fbcon_set_def_font,
2758 .con_font_copy = fbcon_copy_font,
2759 .con_set_palette = fbcon_set_palette,
2760 .con_scrolldelta = fbcon_scrolldelta,
2761 .con_set_origin = fbcon_set_origin,
2762 .con_invert_region = fbcon_invert_region,
2763 .con_screen_pos = fbcon_screen_pos,
2764 .con_getxy = fbcon_getxy,
2765 .con_resize = fbcon_resize,
2766 };
2767
2768 static struct notifier_block fbcon_event_notifier = {
2769 .notifier_call = fbcon_event_notify,
2770 };
2771
2772 static int __init fb_console_init(void)
2773 {
2774 int i;
2775
2776 acquire_console_sem();
2777 fb_register_client(&fbcon_event_notifier);
2778 release_console_sem();
2779
2780 for (i = 0; i < MAX_NR_CONSOLES; i++)
2781 con2fb_map[i] = -1;
2782
2783 if (num_registered_fb) {
2784 for (i = 0; i < FB_MAX; i++) {
2785 if (registered_fb[i] != NULL) {
2786 info_idx = i;
2787 break;
2788 }
2789 }
2790 fbcon_takeover(0);
2791 }
2792
2793 return 0;
2794 }
2795
2796 module_init(fb_console_init);
2797
2798 #ifdef MODULE
2799
2800 static void __exit fb_console_exit(void)
2801 {
2802 acquire_console_sem();
2803 fb_unregister_client(&fbcon_event_notifier);
2804 release_console_sem();
2805 give_up_console(&fb_con);
2806 }
2807
2808 module_exit(fb_console_exit);
2809
2810 #endif
2811
2812 MODULE_LICENSE("GPL");
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