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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / video / console / fbcon.c
blobb209adbd508a96df8285047be74e9b42dea55938
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 ARM_CURSOR_BLINK_RATE (10)
146 #define ATARI_CURSOR_BLINK_RATE (42)
147 #define MAC_CURSOR_BLINK_RATE (32)
148 #define DEFAULT_CURSOR_BLINK_RATE (20)
149
150 static int vbl_cursor_cnt;
151
152 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
153
154 /*
155 * Interface used by the world
156 */
157
158 static const char *fbcon_startup(void);
159 static void fbcon_init(struct vc_data *vc, int init);
160 static void fbcon_deinit(struct vc_data *vc);
161 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
162 int width);
163 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
164 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
165 int count, int ypos, int xpos);
166 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
167 static void fbcon_cursor(struct vc_data *vc, int mode);
168 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
169 int count);
170 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
171 int height, int width);
172 static int fbcon_switch(struct vc_data *vc);
173 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
174 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
175 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
176
177 /*
178 * Internal routines
179 */
180 static __inline__ int real_y(struct display *p, int ypos);
181 static __inline__ void ywrap_up(struct vc_data *vc, int count);
182 static __inline__ void ywrap_down(struct vc_data *vc, int count);
183 static __inline__ void ypan_up(struct vc_data *vc, int count);
184 static __inline__ void ypan_down(struct vc_data *vc, int count);
185 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
186 int dy, int dx, int height, int width, u_int y_break);
187 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
188 struct vc_data *vc);
189 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 int unit);
191 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
192 int line, int count, int dy);
193
194 #ifdef CONFIG_MAC
195 /*
196 * On the Macintoy, there may or may not be a working VBL int. We need to probe
197 */
198 static int vbl_detected;
199
200 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
201 {
202 vbl_detected++;
203 return IRQ_HANDLED;
204 }
205 #endif
206
207 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
208 {
209 struct fbcon_ops *ops = info->fbcon_par;
210
211 return (info->state != FBINFO_STATE_RUNNING ||
212 vc->vc_mode != KD_TEXT || ops->graphics);
213 }
214
215 static inline int get_color(struct vc_data *vc, struct fb_info *info,
216 u16 c, int is_fg)
217 {
218 int depth = fb_get_color_depth(&info->var);
219 int color = 0;
220
221 if (console_blanked) {
222 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
223
224 c = vc->vc_video_erase_char & charmask;
225 }
226
227 if (depth != 1)
228 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
229 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
230
231 switch (depth) {
232 case 1:
233 {
234 /* 0 or 1 */
235 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? 1 : 0;
236 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : 1;
237
238 if (console_blanked)
239 fg = bg;
240
241 color = (is_fg) ? fg : bg;
242 break;
243 }
244 case 2:
245 /*
246 * Scale down 16-colors to 4 colors. Default 4-color palette
247 * is grayscale.
248 */
249 color /= 4;
250 break;
251 case 3:
252 /*
253 * Last 8 entries of default 16-color palette is a more intense
254 * version of the first 8 (i.e., same chrominance, different
255 * luminance).
256 */
257 color &= 7;
258 break;
259 }
260
261
262 return color;
263 }
264
265 static void fb_flashcursor(void *private)
266 {
267 struct fb_info *info = private;
268 struct fbcon_ops *ops = info->fbcon_par;
269 struct display *p;
270 struct vc_data *vc = NULL;
271 int c;
272 int mode;
273
274 if (ops->currcon != -1)
275 vc = vc_cons[ops->currcon].d;
276
277 if (!vc || !CON_IS_VISIBLE(vc) ||
278 fbcon_is_inactive(vc, info) ||
279 registered_fb[con2fb_map[vc->vc_num]] != info)
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(__arm__) && defined(IRQ_VSYNCPULSE)) || 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 #if defined(__arm__) && defined(IRQ_VSYNCPULSE)
882 cursor_blink_rate = ARM_CURSOR_BLINK_RATE;
883 irqres = request_irq(IRQ_VSYNCPULSE, fb_vbl_handler, SA_SHIRQ,
884 "framebuffer vbl", info);
885 #endif
886 /* Initialize the work queue. If the driver provides its
887 * own work queue this means it will use something besides
888 * default timer to flash the cursor. */
889 if (!info->queue.func) {
890 INIT_WORK(&info->queue, fb_flashcursor, info);
891
892 init_timer(&ops->cursor_timer);
893 ops->cursor_timer.function = cursor_timer_handler;
894 ops->cursor_timer.expires = jiffies + HZ / 5;
895 ops->cursor_timer.data = (unsigned long ) info;
896 add_timer(&ops->cursor_timer);
897 }
898 return display_desc;
899 }
900
901 static void fbcon_init(struct vc_data *vc, int init)
902 {
903 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
904 struct fbcon_ops *ops;
905 struct vc_data **default_mode = vc->vc_display_fg;
906 struct vc_data *svc = *default_mode;
907 struct display *t, *p = &fb_display[vc->vc_num];
908 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
909 int cap;
910
911 if (info_idx == -1 || info == NULL)
912 return;
913
914 cap = info->flags;
915
916 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
917 (info->fix.type == FB_TYPE_TEXT))
918 logo = 0;
919
920 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
921
922 if (var_to_display(p, &info->var, info))
923 return;
924
925 /* If we are not the first console on this
926 fb, copy the font from that console */
927 t = &fb_display[svc->vc_num];
928 if (!vc->vc_font.data) {
929 vc->vc_font.data = p->fontdata = t->fontdata;
930 vc->vc_font.width = (*default_mode)->vc_font.width;
931 vc->vc_font.height = (*default_mode)->vc_font.height;
932 p->userfont = t->userfont;
933 if (p->userfont)
934 REFCOUNT(p->fontdata)++;
935 }
936 if (p->userfont)
937 charcnt = FNTCHARCNT(p->fontdata);
938 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
939 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
940 if (charcnt == 256) {
941 vc->vc_hi_font_mask = 0;
942 } else {
943 vc->vc_hi_font_mask = 0x100;
944 if (vc->vc_can_do_color)
945 vc->vc_complement_mask <<= 1;
946 }
947
948 if (!*svc->vc_uni_pagedir_loc)
949 con_set_default_unimap(svc);
950 if (!*vc->vc_uni_pagedir_loc)
951 con_copy_unimap(vc, svc);
952
953 cols = vc->vc_cols;
954 rows = vc->vc_rows;
955 new_cols = info->var.xres / vc->vc_font.width;
956 new_rows = info->var.yres / vc->vc_font.height;
957 vc_resize(vc, new_cols, new_rows);
958
959 ops = info->fbcon_par;
960 /*
961 * We must always set the mode. The mode of the previous console
962 * driver could be in the same resolution but we are using different
963 * hardware so we have to initialize the hardware.
964 *
965 * We need to do it in fbcon_init() to prevent screen corruption.
966 */
967 if (CON_IS_VISIBLE(vc)) {
968 if (info->fbops->fb_set_par &&
969 !(ops->flags & FBCON_FLAGS_INIT))
970 info->fbops->fb_set_par(info);
971 ops->flags |= FBCON_FLAGS_INIT;
972 }
973
974 ops->graphics = 0;
975
976 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
977 !(cap & FBINFO_HWACCEL_DISABLED))
978 p->scrollmode = SCROLL_MOVE;
979 else /* default to something safe */
980 p->scrollmode = SCROLL_REDRAW;
981
982 /*
983 * ++guenther: console.c:vc_allocate() relies on initializing
984 * vc_{cols,rows}, but we must not set those if we are only
985 * resizing the console.
986 */
987 if (!init) {
988 vc->vc_cols = new_cols;
989 vc->vc_rows = new_rows;
990 }
991
992 if (logo)
993 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
994
995 if (vc == svc && softback_buf) {
996 int l = fbcon_softback_size / vc->vc_size_row;
997 if (l > 5)
998 softback_end = softback_buf + l * vc->vc_size_row;
999 else {
1000 /* Smaller scrollback makes no sense, and 0 would screw
1001 the operation totally */
1002 softback_top = 0;
1003 }
1004 }
1005 }
1006
1007 static void fbcon_deinit(struct vc_data *vc)
1008 {
1009 struct display *p = &fb_display[vc->vc_num];
1010
1011 if (info_idx != -1)
1012 return;
1013 fbcon_free_font(p);
1014 }
1015
1016 /* ====================================================================== */
1017
1018 /* fbcon_XXX routines - interface used by the world
1019 *
1020 * This system is now divided into two levels because of complications
1021 * caused by hardware scrolling. Top level functions:
1022 *
1023 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1024 *
1025 * handles y values in range [0, scr_height-1] that correspond to real
1026 * screen positions. y_wrap shift means that first line of bitmap may be
1027 * anywhere on this display. These functions convert lineoffsets to
1028 * bitmap offsets and deal with the wrap-around case by splitting blits.
1029 *
1030 * fbcon_bmove_physical_8() -- These functions fast implementations
1031 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1032 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1033 *
1034 * WARNING:
1035 *
1036 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1037 * Implies should only really hardware scroll in rows. Only reason for
1038 * restriction is simplicity & efficiency at the moment.
1039 */
1040
1041 static __inline__ int real_y(struct display *p, int ypos)
1042 {
1043 int rows = p->vrows;
1044
1045 ypos += p->yscroll;
1046 return ypos < rows ? ypos : ypos - rows;
1047 }
1048
1049
1050 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1051 int width)
1052 {
1053 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1054 struct fbcon_ops *ops = info->fbcon_par;
1055
1056 struct display *p = &fb_display[vc->vc_num];
1057 u_int y_break;
1058
1059 if (fbcon_is_inactive(vc, info))
1060 return;
1061
1062 if (!height || !width)
1063 return;
1064
1065 /* Split blits that cross physical y_wrap boundary */
1066
1067 y_break = p->vrows - p->yscroll;
1068 if (sy < y_break && sy + height - 1 >= y_break) {
1069 u_int b = y_break - sy;
1070 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1071 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1072 width);
1073 } else
1074 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1075 }
1076
1077 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1078 int count, int ypos, int xpos)
1079 {
1080 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1081 struct display *p = &fb_display[vc->vc_num];
1082 struct fbcon_ops *ops = info->fbcon_par;
1083
1084 if (!fbcon_is_inactive(vc, info))
1085 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1086 get_color(vc, info, scr_readw(s), 1),
1087 get_color(vc, info, scr_readw(s), 0));
1088 }
1089
1090 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1091 {
1092 unsigned short chr;
1093
1094 scr_writew(c, &chr);
1095 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1096 }
1097
1098 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1099 {
1100 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1101 struct fbcon_ops *ops = info->fbcon_par;
1102
1103 if (!fbcon_is_inactive(vc, info))
1104 ops->clear_margins(vc, info, bottom_only);
1105 }
1106
1107 static void fbcon_cursor(struct vc_data *vc, int mode)
1108 {
1109 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1110 struct fbcon_ops *ops = info->fbcon_par;
1111 struct display *p = &fb_display[vc->vc_num];
1112 int y;
1113 int c = scr_readw((u16 *) vc->vc_pos);
1114
1115 if (fbcon_is_inactive(vc, info))
1116 return;
1117
1118 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1119 if (mode & CM_SOFTBACK) {
1120 mode &= ~CM_SOFTBACK;
1121 y = softback_lines;
1122 } else {
1123 if (softback_lines)
1124 fbcon_set_origin(vc);
1125 y = 0;
1126 }
1127
1128 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1129 get_color(vc, info, c, 0));
1130 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1131 }
1132
1133 static int scrollback_phys_max = 0;
1134 static int scrollback_max = 0;
1135 static int scrollback_current = 0;
1136
1137 static int update_var(int con, struct fb_info *info)
1138 {
1139 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1140 return fb_pan_display(info, &info->var);
1141 return 0;
1142 }
1143
1144 /*
1145 * If no vc is existent yet, just set struct display
1146 */
1147 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1148 int unit)
1149 {
1150 struct display *p = &fb_display[unit];
1151 struct display *t = &fb_display[fg_console];
1152
1153 var->xoffset = var->yoffset = p->yscroll = 0;
1154 if (var_to_display(p, var, info))
1155 return;
1156
1157 p->fontdata = t->fontdata;
1158 p->userfont = t->userfont;
1159 if (p->userfont)
1160 REFCOUNT(p->fontdata)++;
1161 }
1162
1163 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1164 struct vc_data *vc)
1165 {
1166 struct display *p = &fb_display[vc->vc_num], *t;
1167 struct vc_data **default_mode = vc->vc_display_fg;
1168 struct vc_data *svc = *default_mode;
1169 int rows, cols, charcnt = 256;
1170
1171 var->xoffset = var->yoffset = p->yscroll = 0;
1172 if (var_to_display(p, var, info))
1173 return;
1174 t = &fb_display[svc->vc_num];
1175 if (!vc->vc_font.data) {
1176 vc->vc_font.data = p->fontdata = t->fontdata;
1177 vc->vc_font.width = (*default_mode)->vc_font.width;
1178 vc->vc_font.height = (*default_mode)->vc_font.height;
1179 p->userfont = t->userfont;
1180 if (p->userfont)
1181 REFCOUNT(p->fontdata)++;
1182 }
1183 if (p->userfont)
1184 charcnt = FNTCHARCNT(p->fontdata);
1185
1186 vc->vc_can_do_color = (fb_get_color_depth(var) != 1);
1187 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1188 if (charcnt == 256) {
1189 vc->vc_hi_font_mask = 0;
1190 } else {
1191 vc->vc_hi_font_mask = 0x100;
1192 if (vc->vc_can_do_color)
1193 vc->vc_complement_mask <<= 1;
1194 }
1195
1196 if (!*svc->vc_uni_pagedir_loc)
1197 con_set_default_unimap(svc);
1198 if (!*vc->vc_uni_pagedir_loc)
1199 con_copy_unimap(vc, svc);
1200
1201 cols = var->xres / vc->vc_font.width;
1202 rows = var->yres / vc->vc_font.height;
1203 vc_resize(vc, cols, rows);
1204 if (CON_IS_VISIBLE(vc)) {
1205 update_screen(vc);
1206 if (softback_buf) {
1207 int l = fbcon_softback_size / vc->vc_size_row;
1208
1209 if (l > 5)
1210 softback_end = softback_buf + l *
1211 vc->vc_size_row;
1212 else {
1213 /* Smaller scrollback makes no sense, and 0
1214 would screw the operation totally */
1215 softback_top = 0;
1216 }
1217 }
1218 }
1219 }
1220
1221 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1222 {
1223 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1224 struct display *p = &fb_display[vc->vc_num];
1225
1226 p->yscroll += count;
1227 if (p->yscroll >= p->vrows) /* Deal with wrap */
1228 p->yscroll -= p->vrows;
1229 info->var.xoffset = 0;
1230 info->var.yoffset = p->yscroll * vc->vc_font.height;
1231 info->var.vmode |= FB_VMODE_YWRAP;
1232 update_var(vc->vc_num, info);
1233 scrollback_max += count;
1234 if (scrollback_max > scrollback_phys_max)
1235 scrollback_max = scrollback_phys_max;
1236 scrollback_current = 0;
1237 }
1238
1239 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1240 {
1241 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1242 struct display *p = &fb_display[vc->vc_num];
1243
1244 p->yscroll -= count;
1245 if (p->yscroll < 0) /* Deal with wrap */
1246 p->yscroll += p->vrows;
1247 info->var.xoffset = 0;
1248 info->var.yoffset = p->yscroll * vc->vc_font.height;
1249 info->var.vmode |= FB_VMODE_YWRAP;
1250 update_var(vc->vc_num, info);
1251 scrollback_max -= count;
1252 if (scrollback_max < 0)
1253 scrollback_max = 0;
1254 scrollback_current = 0;
1255 }
1256
1257 static __inline__ void ypan_up(struct vc_data *vc, int count)
1258 {
1259 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1260 struct display *p = &fb_display[vc->vc_num];
1261 struct fbcon_ops *ops = info->fbcon_par;
1262
1263 p->yscroll += count;
1264 if (p->yscroll > p->vrows - vc->vc_rows) {
1265 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1266 0, 0, 0, vc->vc_rows, vc->vc_cols);
1267 p->yscroll -= p->vrows - vc->vc_rows;
1268 }
1269 info->var.xoffset = 0;
1270 info->var.yoffset = p->yscroll * vc->vc_font.height;
1271 info->var.vmode &= ~FB_VMODE_YWRAP;
1272 update_var(vc->vc_num, info);
1273 fbcon_clear_margins(vc, 1);
1274 scrollback_max += count;
1275 if (scrollback_max > scrollback_phys_max)
1276 scrollback_max = scrollback_phys_max;
1277 scrollback_current = 0;
1278 }
1279
1280 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1281 {
1282 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1283 struct display *p = &fb_display[vc->vc_num];
1284 int redraw = 0;
1285
1286 p->yscroll += count;
1287 if (p->yscroll > p->vrows - vc->vc_rows) {
1288 p->yscroll -= p->vrows - vc->vc_rows;
1289 redraw = 1;
1290 }
1291
1292 info->var.xoffset = 0;
1293 info->var.yoffset = p->yscroll * vc->vc_font.height;
1294 info->var.vmode &= ~FB_VMODE_YWRAP;
1295 if (redraw)
1296 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1297 update_var(vc->vc_num, info);
1298 fbcon_clear_margins(vc, 1);
1299 scrollback_max += count;
1300 if (scrollback_max > scrollback_phys_max)
1301 scrollback_max = scrollback_phys_max;
1302 scrollback_current = 0;
1303 }
1304
1305 static __inline__ void ypan_down(struct vc_data *vc, int count)
1306 {
1307 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1308 struct display *p = &fb_display[vc->vc_num];
1309 struct fbcon_ops *ops = info->fbcon_par;
1310
1311 p->yscroll -= count;
1312 if (p->yscroll < 0) {
1313 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1314 0, vc->vc_rows, vc->vc_cols);
1315 p->yscroll += p->vrows - vc->vc_rows;
1316 }
1317 info->var.xoffset = 0;
1318 info->var.yoffset = p->yscroll * vc->vc_font.height;
1319 info->var.vmode &= ~FB_VMODE_YWRAP;
1320 update_var(vc->vc_num, info);
1321 fbcon_clear_margins(vc, 1);
1322 scrollback_max -= count;
1323 if (scrollback_max < 0)
1324 scrollback_max = 0;
1325 scrollback_current = 0;
1326 }
1327
1328 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1329 {
1330 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1331 struct display *p = &fb_display[vc->vc_num];
1332 int redraw = 0;
1333
1334 p->yscroll -= count;
1335 if (p->yscroll < 0) {
1336 p->yscroll += p->vrows - vc->vc_rows;
1337 redraw = 1;
1338 }
1339 info->var.xoffset = 0;
1340 info->var.yoffset = p->yscroll * vc->vc_font.height;
1341 info->var.vmode &= ~FB_VMODE_YWRAP;
1342 if (redraw)
1343 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1344 update_var(vc->vc_num, info);
1345 fbcon_clear_margins(vc, 1);
1346 scrollback_max -= count;
1347 if (scrollback_max < 0)
1348 scrollback_max = 0;
1349 scrollback_current = 0;
1350 }
1351
1352 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1353 long delta)
1354 {
1355 int count = vc->vc_rows;
1356 unsigned short *d, *s;
1357 unsigned long n;
1358 int line = 0;
1359
1360 d = (u16 *) softback_curr;
1361 if (d == (u16 *) softback_in)
1362 d = (u16 *) vc->vc_origin;
1363 n = softback_curr + delta * vc->vc_size_row;
1364 softback_lines -= delta;
1365 if (delta < 0) {
1366 if (softback_curr < softback_top && n < softback_buf) {
1367 n += softback_end - softback_buf;
1368 if (n < softback_top) {
1369 softback_lines -=
1370 (softback_top - n) / vc->vc_size_row;
1371 n = softback_top;
1372 }
1373 } else if (softback_curr >= softback_top
1374 && n < softback_top) {
1375 softback_lines -=
1376 (softback_top - n) / vc->vc_size_row;
1377 n = softback_top;
1378 }
1379 } else {
1380 if (softback_curr > softback_in && n >= softback_end) {
1381 n += softback_buf - softback_end;
1382 if (n > softback_in) {
1383 n = softback_in;
1384 softback_lines = 0;
1385 }
1386 } else if (softback_curr <= softback_in && n > softback_in) {
1387 n = softback_in;
1388 softback_lines = 0;
1389 }
1390 }
1391 if (n == softback_curr)
1392 return;
1393 softback_curr = n;
1394 s = (u16 *) softback_curr;
1395 if (s == (u16 *) softback_in)
1396 s = (u16 *) vc->vc_origin;
1397 while (count--) {
1398 unsigned short *start;
1399 unsigned short *le;
1400 unsigned short c;
1401 int x = 0;
1402 unsigned short attr = 1;
1403
1404 start = s;
1405 le = advance_row(s, 1);
1406 do {
1407 c = scr_readw(s);
1408 if (attr != (c & 0xff00)) {
1409 attr = c & 0xff00;
1410 if (s > start) {
1411 fbcon_putcs(vc, start, s - start,
1412 line, x);
1413 x += s - start;
1414 start = s;
1415 }
1416 }
1417 if (c == scr_readw(d)) {
1418 if (s > start) {
1419 fbcon_putcs(vc, start, s - start,
1420 line, x);
1421 x += s - start + 1;
1422 start = s + 1;
1423 } else {
1424 x++;
1425 start++;
1426 }
1427 }
1428 s++;
1429 d++;
1430 } while (s < le);
1431 if (s > start)
1432 fbcon_putcs(vc, start, s - start, line, x);
1433 line++;
1434 if (d == (u16 *) softback_end)
1435 d = (u16 *) softback_buf;
1436 if (d == (u16 *) softback_in)
1437 d = (u16 *) vc->vc_origin;
1438 if (s == (u16 *) softback_end)
1439 s = (u16 *) softback_buf;
1440 if (s == (u16 *) softback_in)
1441 s = (u16 *) vc->vc_origin;
1442 }
1443 }
1444
1445 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1446 int line, int count, int dy)
1447 {
1448 unsigned short *s = (unsigned short *)
1449 (vc->vc_origin + vc->vc_size_row * line);
1450
1451 while (count--) {
1452 unsigned short *start = s;
1453 unsigned short *le = advance_row(s, 1);
1454 unsigned short c;
1455 int x = 0;
1456 unsigned short attr = 1;
1457
1458 do {
1459 c = scr_readw(s);
1460 if (attr != (c & 0xff00)) {
1461 attr = c & 0xff00;
1462 if (s > start) {
1463 fbcon_putcs(vc, start, s - start,
1464 dy, x);
1465 x += s - start;
1466 start = s;
1467 }
1468 }
1469 console_conditional_schedule();
1470 s++;
1471 } while (s < le);
1472 if (s > start)
1473 fbcon_putcs(vc, start, s - start, dy, x);
1474 console_conditional_schedule();
1475 dy++;
1476 }
1477 }
1478
1479 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1480 int line, int count, int offset)
1481 {
1482 unsigned short *d = (unsigned short *)
1483 (vc->vc_origin + vc->vc_size_row * line);
1484 unsigned short *s = d + offset;
1485
1486 while (count--) {
1487 unsigned short *start = s;
1488 unsigned short *le = advance_row(s, 1);
1489 unsigned short c;
1490 int x = 0;
1491 unsigned short attr = 1;
1492
1493 do {
1494 c = scr_readw(s);
1495 if (attr != (c & 0xff00)) {
1496 attr = c & 0xff00;
1497 if (s > start) {
1498 fbcon_putcs(vc, start, s - start,
1499 line, x);
1500 x += s - start;
1501 start = s;
1502 }
1503 }
1504 if (c == scr_readw(d)) {
1505 if (s > start) {
1506 fbcon_putcs(vc, start, s - start,
1507 line, x);
1508 x += s - start + 1;
1509 start = s + 1;
1510 } else {
1511 x++;
1512 start++;
1513 }
1514 }
1515 scr_writew(c, d);
1516 console_conditional_schedule();
1517 s++;
1518 d++;
1519 } while (s < le);
1520 if (s > start)
1521 fbcon_putcs(vc, start, s - start, line, x);
1522 console_conditional_schedule();
1523 if (offset > 0)
1524 line++;
1525 else {
1526 line--;
1527 /* NOTE: We subtract two lines from these pointers */
1528 s -= vc->vc_size_row;
1529 d -= vc->vc_size_row;
1530 }
1531 }
1532 }
1533
1534 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1535 int count)
1536 {
1537 unsigned short *p;
1538
1539 if (vc->vc_num != fg_console)
1540 return;
1541 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1542
1543 while (count) {
1544 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1545 count--;
1546 p = advance_row(p, 1);
1547 softback_in += vc->vc_size_row;
1548 if (softback_in == softback_end)
1549 softback_in = softback_buf;
1550 if (softback_in == softback_top) {
1551 softback_top += vc->vc_size_row;
1552 if (softback_top == softback_end)
1553 softback_top = softback_buf;
1554 }
1555 }
1556 softback_curr = softback_in;
1557 }
1558
1559 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1560 int count)
1561 {
1562 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1563 struct display *p = &fb_display[vc->vc_num];
1564 struct fbcon_ops *ops = info->fbcon_par;
1565 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1566
1567 if (fbcon_is_inactive(vc, info))
1568 return -EINVAL;
1569
1570 fbcon_cursor(vc, CM_ERASE);
1571
1572 /*
1573 * ++Geert: Only use ywrap/ypan if the console is in text mode
1574 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1575 * whole screen (prevents flicker).
1576 */
1577
1578 switch (dir) {
1579 case SM_UP:
1580 if (count > vc->vc_rows) /* Maximum realistic size */
1581 count = vc->vc_rows;
1582 if (softback_top)
1583 fbcon_softback_note(vc, t, count);
1584 if (logo_shown >= 0)
1585 goto redraw_up;
1586 switch (p->scrollmode) {
1587 case SCROLL_MOVE:
1588 ops->bmove(vc, info, t + count, 0, t, 0,
1589 b - t - count, vc->vc_cols);
1590 ops->clear(vc, info, b - count, 0, count,
1591 vc->vc_cols);
1592 break;
1593
1594 case SCROLL_WRAP_MOVE:
1595 if (b - t - count > 3 * vc->vc_rows >> 2) {
1596 if (t > 0)
1597 fbcon_bmove(vc, 0, 0, count, 0, t,
1598 vc->vc_cols);
1599 ywrap_up(vc, count);
1600 if (vc->vc_rows - b > 0)
1601 fbcon_bmove(vc, b - count, 0, b, 0,
1602 vc->vc_rows - b,
1603 vc->vc_cols);
1604 } else if (info->flags & FBINFO_READS_FAST)
1605 fbcon_bmove(vc, t + count, 0, t, 0,
1606 b - t - count, vc->vc_cols);
1607 else
1608 goto redraw_up;
1609 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1610 break;
1611
1612 case SCROLL_PAN_REDRAW:
1613 if ((p->yscroll + count <=
1614 2 * (p->vrows - vc->vc_rows))
1615 && ((!scroll_partial && (b - t == vc->vc_rows))
1616 || (scroll_partial
1617 && (b - t - count >
1618 3 * vc->vc_rows >> 2)))) {
1619 if (t > 0)
1620 fbcon_redraw_move(vc, p, 0, t, count);
1621 ypan_up_redraw(vc, t, count);
1622 if (vc->vc_rows - b > 0)
1623 fbcon_redraw_move(vc, p, b - count,
1624 vc->vc_rows - b, b);
1625 } else
1626 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1627 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1628 break;
1629
1630 case SCROLL_PAN_MOVE:
1631 if ((p->yscroll + count <=
1632 2 * (p->vrows - vc->vc_rows))
1633 && ((!scroll_partial && (b - t == vc->vc_rows))
1634 || (scroll_partial
1635 && (b - t - count >
1636 3 * vc->vc_rows >> 2)))) {
1637 if (t > 0)
1638 fbcon_bmove(vc, 0, 0, count, 0, t,
1639 vc->vc_cols);
1640 ypan_up(vc, count);
1641 if (vc->vc_rows - b > 0)
1642 fbcon_bmove(vc, b - count, 0, b, 0,
1643 vc->vc_rows - b,
1644 vc->vc_cols);
1645 } else if (info->flags & FBINFO_READS_FAST)
1646 fbcon_bmove(vc, t + count, 0, t, 0,
1647 b - t - count, vc->vc_cols);
1648 else
1649 goto redraw_up;
1650 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1651 break;
1652
1653 case SCROLL_REDRAW:
1654 redraw_up:
1655 fbcon_redraw(vc, p, t, b - t - count,
1656 count * vc->vc_cols);
1657 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1658 scr_memsetw((unsigned short *) (vc->vc_origin +
1659 vc->vc_size_row *
1660 (b - count)),
1661 vc->vc_video_erase_char,
1662 vc->vc_size_row * count);
1663 return 1;
1664 }
1665 break;
1666
1667 case SM_DOWN:
1668 if (count > vc->vc_rows) /* Maximum realistic size */
1669 count = vc->vc_rows;
1670 switch (p->scrollmode) {
1671 case SCROLL_MOVE:
1672 ops->bmove(vc, info, t, 0, t + count, 0,
1673 b - t - count, vc->vc_cols);
1674 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1675 break;
1676
1677 case SCROLL_WRAP_MOVE:
1678 if (b - t - count > 3 * vc->vc_rows >> 2) {
1679 if (vc->vc_rows - b > 0)
1680 fbcon_bmove(vc, b, 0, b - count, 0,
1681 vc->vc_rows - b,
1682 vc->vc_cols);
1683 ywrap_down(vc, count);
1684 if (t > 0)
1685 fbcon_bmove(vc, count, 0, 0, 0, t,
1686 vc->vc_cols);
1687 } else if (info->flags & FBINFO_READS_FAST)
1688 fbcon_bmove(vc, t, 0, t + count, 0,
1689 b - t - count, vc->vc_cols);
1690 else
1691 goto redraw_down;
1692 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1693 break;
1694
1695 case SCROLL_PAN_MOVE:
1696 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1697 && ((!scroll_partial && (b - t == vc->vc_rows))
1698 || (scroll_partial
1699 && (b - t - count >
1700 3 * vc->vc_rows >> 2)))) {
1701 if (vc->vc_rows - b > 0)
1702 fbcon_bmove(vc, b, 0, b - count, 0,
1703 vc->vc_rows - b,
1704 vc->vc_cols);
1705 ypan_down(vc, count);
1706 if (t > 0)
1707 fbcon_bmove(vc, count, 0, 0, 0, t,
1708 vc->vc_cols);
1709 } else if (info->flags & FBINFO_READS_FAST)
1710 fbcon_bmove(vc, t, 0, t + count, 0,
1711 b - t - count, vc->vc_cols);
1712 else
1713 goto redraw_down;
1714 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1715 break;
1716
1717 case SCROLL_PAN_REDRAW:
1718 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1719 && ((!scroll_partial && (b - t == vc->vc_rows))
1720 || (scroll_partial
1721 && (b - t - count >
1722 3 * vc->vc_rows >> 2)))) {
1723 if (vc->vc_rows - b > 0)
1724 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1725 b - count);
1726 ypan_down_redraw(vc, t, count);
1727 if (t > 0)
1728 fbcon_redraw_move(vc, p, count, t, 0);
1729 } else
1730 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1731 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1732 break;
1733
1734 case SCROLL_REDRAW:
1735 redraw_down:
1736 fbcon_redraw(vc, p, b - 1, b - t - count,
1737 -count * vc->vc_cols);
1738 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1739 scr_memsetw((unsigned short *) (vc->vc_origin +
1740 vc->vc_size_row *
1741 t),
1742 vc->vc_video_erase_char,
1743 vc->vc_size_row * count);
1744 return 1;
1745 }
1746 }
1747 return 0;
1748 }
1749
1750
1751 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1752 int height, int width)
1753 {
1754 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1755 struct display *p = &fb_display[vc->vc_num];
1756
1757 if (fbcon_is_inactive(vc, info))
1758 return;
1759
1760 if (!width || !height)
1761 return;
1762
1763 /* Split blits that cross physical y_wrap case.
1764 * Pathological case involves 4 blits, better to use recursive
1765 * code rather than unrolled case
1766 *
1767 * Recursive invocations don't need to erase the cursor over and
1768 * over again, so we use fbcon_bmove_rec()
1769 */
1770 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1771 p->vrows - p->yscroll);
1772 }
1773
1774 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1775 int dy, int dx, int height, int width, u_int y_break)
1776 {
1777 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1778 struct fbcon_ops *ops = info->fbcon_par;
1779 u_int b;
1780
1781 if (sy < y_break && sy + height > y_break) {
1782 b = y_break - sy;
1783 if (dy < sy) { /* Avoid trashing self */
1784 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1785 y_break);
1786 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1787 height - b, width, y_break);
1788 } else {
1789 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1790 height - b, width, y_break);
1791 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1792 y_break);
1793 }
1794 return;
1795 }
1796
1797 if (dy < y_break && dy + height > y_break) {
1798 b = y_break - dy;
1799 if (dy < sy) { /* Avoid trashing self */
1800 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1801 y_break);
1802 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1803 height - b, width, y_break);
1804 } else {
1805 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1806 height - b, width, y_break);
1807 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1808 y_break);
1809 }
1810 return;
1811 }
1812 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1813 height, width);
1814 }
1815
1816 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1817 struct vc_data *vc)
1818 {
1819 int fh = vc->vc_font.height;
1820 int cap = info->flags;
1821 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1822 && divides(info->fix.ypanstep, vc->vc_font.height)
1823 && info->var.yres_virtual > info->var.yres;
1824 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1825 && divides(info->fix.ywrapstep, vc->vc_font.height)
1826 && divides(vc->vc_font.height, info->var.yres_virtual);
1827 int reading_fast = cap & FBINFO_READS_FAST;
1828 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1829 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1830
1831 p->vrows = info->var.yres_virtual/fh;
1832 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1833 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1834 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1835 info->var.yres % fh))
1836 p->vrows--;
1837
1838 if (good_wrap || good_pan) {
1839 if (reading_fast || fast_copyarea)
1840 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1841 else
1842 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1843 SCROLL_PAN_REDRAW;
1844 } else {
1845 if (reading_fast || (fast_copyarea && !fast_imageblit))
1846 p->scrollmode = SCROLL_MOVE;
1847 else
1848 p->scrollmode = SCROLL_REDRAW;
1849 }
1850 }
1851
1852 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1853 unsigned int height)
1854 {
1855 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1856 struct display *p = &fb_display[vc->vc_num];
1857 struct fb_var_screeninfo var = info->var;
1858 int x_diff, y_diff;
1859 int fw = vc->vc_font.width;
1860 int fh = vc->vc_font.height;
1861
1862 var.xres = width * fw;
1863 var.yres = height * fh;
1864 x_diff = info->var.xres - var.xres;
1865 y_diff = info->var.yres - var.yres;
1866 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1867 struct fb_videomode *mode;
1868
1869 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1870 mode = fb_find_best_mode(&var, &info->modelist);
1871 if (mode == NULL)
1872 return -EINVAL;
1873 fb_videomode_to_var(&var, mode);
1874 if (width > var.xres/fw || height > var.yres/fh)
1875 return -EINVAL;
1876 /*
1877 * The following can probably have any value... Do we need to
1878 * set all of them?
1879 */
1880 var.bits_per_pixel = p->bits_per_pixel;
1881 var.xres_virtual = p->xres_virtual;
1882 var.yres_virtual = p->yres_virtual;
1883 var.accel_flags = p->accel_flags;
1884 var.width = p->width;
1885 var.height = p->height;
1886 var.red = p->red;
1887 var.green = p->green;
1888 var.blue = p->blue;
1889 var.transp = p->transp;
1890 var.nonstd = p->nonstd;
1891
1892 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1893 if (CON_IS_VISIBLE(vc)) {
1894 var.activate = FB_ACTIVATE_NOW |
1895 FB_ACTIVATE_FORCE;
1896 fb_set_var(info, &var);
1897 }
1898 var_to_display(p, &info->var, info);
1899 }
1900 updatescrollmode(p, info, vc);
1901 return 0;
1902 }
1903
1904 static int fbcon_switch(struct vc_data *vc)
1905 {
1906 struct fb_info *info;
1907 struct display *p = &fb_display[vc->vc_num];
1908 struct fb_var_screeninfo var;
1909 int i, prev_console;
1910
1911 info = registered_fb[con2fb_map[vc->vc_num]];
1912
1913 if (softback_top) {
1914 int l = fbcon_softback_size / vc->vc_size_row;
1915 if (softback_lines)
1916 fbcon_set_origin(vc);
1917 softback_top = softback_curr = softback_in = softback_buf;
1918 softback_lines = 0;
1919
1920 if (l > 5)
1921 softback_end = softback_buf + l * vc->vc_size_row;
1922 else {
1923 /* Smaller scrollback makes no sense, and 0 would screw
1924 the operation totally */
1925 softback_top = 0;
1926 }
1927 }
1928
1929 if (logo_shown >= 0) {
1930 struct vc_data *conp2 = vc_cons[logo_shown].d;
1931
1932 if (conp2->vc_top == logo_lines
1933 && conp2->vc_bottom == conp2->vc_rows)
1934 conp2->vc_top = 0;
1935 logo_shown = FBCON_LOGO_CANSHOW;
1936 }
1937
1938 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
1939
1940 /*
1941 * FIXME: If we have multiple fbdev's loaded, we need to
1942 * update all info->currcon. Perhaps, we can place this
1943 * in a centralized structure, but this might break some
1944 * drivers.
1945 *
1946 * info->currcon = vc->vc_num;
1947 */
1948 for (i = 0; i < FB_MAX; i++) {
1949 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1950 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1951
1952 ops->currcon = vc->vc_num;
1953 }
1954 }
1955 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1956 display_to_var(&var, p);
1957 var.activate = FB_ACTIVATE_NOW;
1958
1959 /*
1960 * make sure we don't unnecessarily trip the memcmp()
1961 * in fb_set_var()
1962 */
1963 info->var.activate = var.activate;
1964 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1965 fb_set_var(info, &var);
1966
1967 if (prev_console != -1 &&
1968 registered_fb[con2fb_map[prev_console]] != info &&
1969 info->fbops->fb_set_par)
1970 info->fbops->fb_set_par(info);
1971
1972 set_blitting_type(vc, info, p);
1973 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1974
1975 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
1976 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1977 updatescrollmode(p, info, vc);
1978
1979 switch (p->scrollmode) {
1980 case SCROLL_WRAP_MOVE:
1981 scrollback_phys_max = p->vrows - vc->vc_rows;
1982 break;
1983 case SCROLL_PAN_MOVE:
1984 case SCROLL_PAN_REDRAW:
1985 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
1986 if (scrollback_phys_max < 0)
1987 scrollback_phys_max = 0;
1988 break;
1989 default:
1990 scrollback_phys_max = 0;
1991 break;
1992 }
1993 scrollback_max = 0;
1994 scrollback_current = 0;
1995
1996 update_var(vc->vc_num, info);
1997 fbcon_set_palette(vc, color_table);
1998 fbcon_clear_margins(vc, 0);
1999
2000 if (logo_shown == FBCON_LOGO_DRAW) {
2001
2002 logo_shown = fg_console;
2003 /* This is protected above by initmem_freed */
2004 fb_show_logo(info);
2005 update_region(vc,
2006 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2007 vc->vc_size_row * (vc->vc_bottom -
2008 vc->vc_top) / 2);
2009 return 0;
2010 }
2011 return 1;
2012 }
2013
2014 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2015 int blank)
2016 {
2017 if (blank) {
2018 unsigned short charmask = vc->vc_hi_font_mask ?
2019 0x1ff : 0xff;
2020 unsigned short oldc;
2021
2022 oldc = vc->vc_video_erase_char;
2023 vc->vc_video_erase_char &= charmask;
2024 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2025 vc->vc_video_erase_char = oldc;
2026 }
2027 }
2028
2029 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2030 {
2031 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2032 struct fbcon_ops *ops = info->fbcon_par;
2033
2034 if (mode_switch) {
2035 struct fb_var_screeninfo var = info->var;
2036
2037 ops->graphics = 1;
2038
2039 if (!blank) {
2040 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2041 fb_set_var(info, &var);
2042 ops->graphics = 0;
2043 }
2044 }
2045
2046 if (!fbcon_is_inactive(vc, info)) {
2047 if (ops->blank_state != blank) {
2048 ops->blank_state = blank;
2049 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2050 ops->cursor_flash = (!blank);
2051
2052 if (fb_blank(info, blank))
2053 fbcon_generic_blank(vc, info, blank);
2054 }
2055
2056 if (!blank)
2057 update_screen(vc);
2058 }
2059
2060 return 0;
2061 }
2062
2063 static void fbcon_free_font(struct display *p)
2064 {
2065 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2066 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2067 p->fontdata = NULL;
2068 p->userfont = 0;
2069 }
2070
2071 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2072 {
2073 u8 *fontdata = vc->vc_font.data;
2074 u8 *data = font->data;
2075 int i, j;
2076
2077 font->width = vc->vc_font.width;
2078 font->height = vc->vc_font.height;
2079 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2080 if (!font->data)
2081 return 0;
2082
2083 if (font->width <= 8) {
2084 j = vc->vc_font.height;
2085 for (i = 0; i < font->charcount; i++) {
2086 memcpy(data, fontdata, j);
2087 memset(data + j, 0, 32 - j);
2088 data += 32;
2089 fontdata += j;
2090 }
2091 } else if (font->width <= 16) {
2092 j = vc->vc_font.height * 2;
2093 for (i = 0; i < font->charcount; i++) {
2094 memcpy(data, fontdata, j);
2095 memset(data + j, 0, 64 - j);
2096 data += 64;
2097 fontdata += j;
2098 }
2099 } else if (font->width <= 24) {
2100 for (i = 0; i < font->charcount; i++) {
2101 for (j = 0; j < vc->vc_font.height; j++) {
2102 *data++ = fontdata[0];
2103 *data++ = fontdata[1];
2104 *data++ = fontdata[2];
2105 fontdata += sizeof(u32);
2106 }
2107 memset(data, 0, 3 * (32 - j));
2108 data += 3 * (32 - j);
2109 }
2110 } else {
2111 j = vc->vc_font.height * 4;
2112 for (i = 0; i < font->charcount; i++) {
2113 memcpy(data, fontdata, j);
2114 memset(data + j, 0, 128 - j);
2115 data += 128;
2116 fontdata += j;
2117 }
2118 }
2119 return 0;
2120 }
2121
2122 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2123 u8 * data, int userfont)
2124 {
2125 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2126 struct display *p = &fb_display[vc->vc_num];
2127 int resize;
2128 int cnt;
2129 char *old_data = NULL;
2130
2131 if (CON_IS_VISIBLE(vc) && softback_lines)
2132 fbcon_set_origin(vc);
2133
2134 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2135 if (p->userfont)
2136 old_data = vc->vc_font.data;
2137 if (userfont)
2138 cnt = FNTCHARCNT(data);
2139 else
2140 cnt = 256;
2141 vc->vc_font.data = p->fontdata = data;
2142 if ((p->userfont = userfont))
2143 REFCOUNT(data)++;
2144 vc->vc_font.width = w;
2145 vc->vc_font.height = h;
2146 if (vc->vc_hi_font_mask && cnt == 256) {
2147 vc->vc_hi_font_mask = 0;
2148 if (vc->vc_can_do_color) {
2149 vc->vc_complement_mask >>= 1;
2150 vc->vc_s_complement_mask >>= 1;
2151 }
2152
2153 /* ++Edmund: reorder the attribute bits */
2154 if (vc->vc_can_do_color) {
2155 unsigned short *cp =
2156 (unsigned short *) vc->vc_origin;
2157 int count = vc->vc_screenbuf_size / 2;
2158 unsigned short c;
2159 for (; count > 0; count--, cp++) {
2160 c = scr_readw(cp);
2161 scr_writew(((c & 0xfe00) >> 1) |
2162 (c & 0xff), cp);
2163 }
2164 c = vc->vc_video_erase_char;
2165 vc->vc_video_erase_char =
2166 ((c & 0xfe00) >> 1) | (c & 0xff);
2167 vc->vc_attr >>= 1;
2168 }
2169 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2170 vc->vc_hi_font_mask = 0x100;
2171 if (vc->vc_can_do_color) {
2172 vc->vc_complement_mask <<= 1;
2173 vc->vc_s_complement_mask <<= 1;
2174 }
2175
2176 /* ++Edmund: reorder the attribute bits */
2177 {
2178 unsigned short *cp =
2179 (unsigned short *) vc->vc_origin;
2180 int count = vc->vc_screenbuf_size / 2;
2181 unsigned short c;
2182 for (; count > 0; count--, cp++) {
2183 unsigned short newc;
2184 c = scr_readw(cp);
2185 if (vc->vc_can_do_color)
2186 newc =
2187 ((c & 0xff00) << 1) | (c &
2188 0xff);
2189 else
2190 newc = c & ~0x100;
2191 scr_writew(newc, cp);
2192 }
2193 c = vc->vc_video_erase_char;
2194 if (vc->vc_can_do_color) {
2195 vc->vc_video_erase_char =
2196 ((c & 0xff00) << 1) | (c & 0xff);
2197 vc->vc_attr <<= 1;
2198 } else
2199 vc->vc_video_erase_char = c & ~0x100;
2200 }
2201
2202 }
2203
2204 if (resize) {
2205 /* reset wrap/pan */
2206 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2207 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2208 if (CON_IS_VISIBLE(vc) && softback_buf) {
2209 int l = fbcon_softback_size / vc->vc_size_row;
2210 if (l > 5)
2211 softback_end =
2212 softback_buf + l * vc->vc_size_row;
2213 else {
2214 /* Smaller scrollback makes no sense, and 0 would screw
2215 the operation totally */
2216 softback_top = 0;
2217 }
2218 }
2219 } else if (CON_IS_VISIBLE(vc)
2220 && vc->vc_mode == KD_TEXT) {
2221 fbcon_clear_margins(vc, 0);
2222 update_screen(vc);
2223 }
2224
2225 if (old_data && (--REFCOUNT(old_data) == 0))
2226 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2227 return 0;
2228 }
2229
2230 static int fbcon_copy_font(struct vc_data *vc, int con)
2231 {
2232 struct display *od = &fb_display[con];
2233 struct console_font *f = &vc->vc_font;
2234
2235 if (od->fontdata == f->data)
2236 return 0; /* already the same font... */
2237 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2238 }
2239
2240 /*
2241 * User asked to set font; we are guaranteed that
2242 * a) width and height are in range 1..32
2243 * b) charcount does not exceed 512
2244 * but lets not assume that, since someone might someday want to use larger
2245 * fonts. And charcount of 512 is small for unicode support.
2246 *
2247 * However, user space gives the font in 32 rows , regardless of
2248 * actual font height. So a new API is needed if support for larger fonts
2249 * is ever implemented.
2250 */
2251
2252 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2253 {
2254 unsigned charcount = font->charcount;
2255 int w = font->width;
2256 int h = font->height;
2257 int size;
2258 int i, csum;
2259 u8 *new_data, *data = font->data;
2260 int pitch = (font->width+7) >> 3;
2261
2262 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2263 * If not this check should be changed to charcount < 256 */
2264 if (charcount != 256 && charcount != 512)
2265 return -EINVAL;
2266
2267 size = h * pitch * charcount;
2268
2269 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2270
2271 if (!new_data)
2272 return -ENOMEM;
2273
2274 new_data += FONT_EXTRA_WORDS * sizeof(int);
2275 FNTSIZE(new_data) = size;
2276 FNTCHARCNT(new_data) = charcount;
2277 REFCOUNT(new_data) = 0; /* usage counter */
2278 for (i=0; i< charcount; i++) {
2279 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2280 }
2281
2282 /* Since linux has a nice crc32 function use it for counting font
2283 * checksums. */
2284 csum = crc32(0, new_data, size);
2285
2286 FNTSUM(new_data) = csum;
2287 /* Check if the same font is on some other console already */
2288 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2289 struct vc_data *tmp = vc_cons[i].d;
2290
2291 if (fb_display[i].userfont &&
2292 fb_display[i].fontdata &&
2293 FNTSUM(fb_display[i].fontdata) == csum &&
2294 FNTSIZE(fb_display[i].fontdata) == size &&
2295 tmp->vc_font.width == w &&
2296 !memcmp(fb_display[i].fontdata, new_data, size)) {
2297 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2298 new_data = fb_display[i].fontdata;
2299 break;
2300 }
2301 }
2302 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2303 }
2304
2305 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2306 {
2307 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2308 struct font_desc *f;
2309
2310 if (!name)
2311 f = get_default_font(info->var.xres, info->var.yres);
2312 else if (!(f = find_font(name)))
2313 return -ENOENT;
2314
2315 font->width = f->width;
2316 font->height = f->height;
2317 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2318 }
2319
2320 static u16 palette_red[16];
2321 static u16 palette_green[16];
2322 static u16 palette_blue[16];
2323
2324 static struct fb_cmap palette_cmap = {
2325 0, 16, palette_red, palette_green, palette_blue, NULL
2326 };
2327
2328 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2329 {
2330 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2331 int i, j, k, depth;
2332 u8 val;
2333
2334 if (fbcon_is_inactive(vc, info))
2335 return -EINVAL;
2336
2337 if (!CON_IS_VISIBLE(vc))
2338 return 0;
2339
2340 depth = fb_get_color_depth(&info->var);
2341 if (depth > 3) {
2342 for (i = j = 0; i < 16; i++) {
2343 k = table[i];
2344 val = vc->vc_palette[j++];
2345 palette_red[k] = (val << 8) | val;
2346 val = vc->vc_palette[j++];
2347 palette_green[k] = (val << 8) | val;
2348 val = vc->vc_palette[j++];
2349 palette_blue[k] = (val << 8) | val;
2350 }
2351 palette_cmap.len = 16;
2352 palette_cmap.start = 0;
2353 /*
2354 * If framebuffer is capable of less than 16 colors,
2355 * use default palette of fbcon.
2356 */
2357 } else
2358 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2359
2360 return fb_set_cmap(&palette_cmap, info);
2361 }
2362
2363 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2364 {
2365 unsigned long p;
2366 int line;
2367
2368 if (vc->vc_num != fg_console || !softback_lines)
2369 return (u16 *) (vc->vc_origin + offset);
2370 line = offset / vc->vc_size_row;
2371 if (line >= softback_lines)
2372 return (u16 *) (vc->vc_origin + offset -
2373 softback_lines * vc->vc_size_row);
2374 p = softback_curr + offset;
2375 if (p >= softback_end)
2376 p += softback_buf - softback_end;
2377 return (u16 *) p;
2378 }
2379
2380 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2381 int *px, int *py)
2382 {
2383 unsigned long ret;
2384 int x, y;
2385
2386 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2387 unsigned long offset = (pos - vc->vc_origin) / 2;
2388
2389 x = offset % vc->vc_cols;
2390 y = offset / vc->vc_cols;
2391 if (vc->vc_num == fg_console)
2392 y += softback_lines;
2393 ret = pos + (vc->vc_cols - x) * 2;
2394 } else if (vc->vc_num == fg_console && softback_lines) {
2395 unsigned long offset = pos - softback_curr;
2396
2397 if (pos < softback_curr)
2398 offset += softback_end - softback_buf;
2399 offset /= 2;
2400 x = offset % vc->vc_cols;
2401 y = offset / vc->vc_cols;
2402 ret = pos + (vc->vc_cols - x) * 2;
2403 if (ret == softback_end)
2404 ret = softback_buf;
2405 if (ret == softback_in)
2406 ret = vc->vc_origin;
2407 } else {
2408 /* Should not happen */
2409 x = y = 0;
2410 ret = vc->vc_origin;
2411 }
2412 if (px)
2413 *px = x;
2414 if (py)
2415 *py = y;
2416 return ret;
2417 }
2418
2419 /* As we might be inside of softback, we may work with non-contiguous buffer,
2420 that's why we have to use a separate routine. */
2421 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2422 {
2423 while (cnt--) {
2424 u16 a = scr_readw(p);
2425 if (!vc->vc_can_do_color)
2426 a ^= 0x0800;
2427 else if (vc->vc_hi_font_mask == 0x100)
2428 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2429 (((a) & 0x0e00) << 4);
2430 else
2431 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2432 (((a) & 0x0700) << 4);
2433 scr_writew(a, p++);
2434 if (p == (u16 *) softback_end)
2435 p = (u16 *) softback_buf;
2436 if (p == (u16 *) softback_in)
2437 p = (u16 *) vc->vc_origin;
2438 }
2439 }
2440
2441 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2442 {
2443 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2444 struct display *p = &fb_display[fg_console];
2445 int offset, limit, scrollback_old;
2446
2447 if (softback_top) {
2448 if (vc->vc_num != fg_console)
2449 return 0;
2450 if (vc->vc_mode != KD_TEXT || !lines)
2451 return 0;
2452 if (logo_shown >= 0) {
2453 struct vc_data *conp2 = vc_cons[logo_shown].d;
2454
2455 if (conp2->vc_top == logo_lines
2456 && conp2->vc_bottom == conp2->vc_rows)
2457 conp2->vc_top = 0;
2458 if (logo_shown == vc->vc_num) {
2459 unsigned long p, q;
2460 int i;
2461
2462 p = softback_in;
2463 q = vc->vc_origin +
2464 logo_lines * vc->vc_size_row;
2465 for (i = 0; i < logo_lines; i++) {
2466 if (p == softback_top)
2467 break;
2468 if (p == softback_buf)
2469 p = softback_end;
2470 p -= vc->vc_size_row;
2471 q -= vc->vc_size_row;
2472 scr_memcpyw((u16 *) q, (u16 *) p,
2473 vc->vc_size_row);
2474 }
2475 softback_in = p;
2476 update_region(vc, vc->vc_origin,
2477 logo_lines * vc->vc_cols);
2478 }
2479 logo_shown = FBCON_LOGO_CANSHOW;
2480 }
2481 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2482 fbcon_redraw_softback(vc, p, lines);
2483 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2484 return 0;
2485 }
2486
2487 if (!scrollback_phys_max)
2488 return -ENOSYS;
2489
2490 scrollback_old = scrollback_current;
2491 scrollback_current -= lines;
2492 if (scrollback_current < 0)
2493 scrollback_current = 0;
2494 else if (scrollback_current > scrollback_max)
2495 scrollback_current = scrollback_max;
2496 if (scrollback_current == scrollback_old)
2497 return 0;
2498
2499 if (fbcon_is_inactive(vc, info))
2500 return 0;
2501
2502 fbcon_cursor(vc, CM_ERASE);
2503
2504 offset = p->yscroll - scrollback_current;
2505 limit = p->vrows;
2506 switch (p->scrollmode) {
2507 case SCROLL_WRAP_MOVE:
2508 info->var.vmode |= FB_VMODE_YWRAP;
2509 break;
2510 case SCROLL_PAN_MOVE:
2511 case SCROLL_PAN_REDRAW:
2512 limit -= vc->vc_rows;
2513 info->var.vmode &= ~FB_VMODE_YWRAP;
2514 break;
2515 }
2516 if (offset < 0)
2517 offset += limit;
2518 else if (offset >= limit)
2519 offset -= limit;
2520 info->var.xoffset = 0;
2521 info->var.yoffset = offset * vc->vc_font.height;
2522 update_var(vc->vc_num, info);
2523 if (!scrollback_current)
2524 fbcon_cursor(vc, CM_DRAW);
2525 return 0;
2526 }
2527
2528 static int fbcon_set_origin(struct vc_data *vc)
2529 {
2530 if (softback_lines)
2531 fbcon_scrolldelta(vc, softback_lines);
2532 return 0;
2533 }
2534
2535 static void fbcon_suspended(struct fb_info *info)
2536 {
2537 struct vc_data *vc = NULL;
2538 struct fbcon_ops *ops = info->fbcon_par;
2539
2540 if (!ops || ops->currcon < 0)
2541 return;
2542 vc = vc_cons[ops->currcon].d;
2543
2544 /* Clear cursor, restore saved data */
2545 fbcon_cursor(vc, CM_ERASE);
2546 }
2547
2548 static void fbcon_resumed(struct fb_info *info)
2549 {
2550 struct vc_data *vc;
2551 struct fbcon_ops *ops = info->fbcon_par;
2552
2553 if (!ops || ops->currcon < 0)
2554 return;
2555 vc = vc_cons[ops->currcon].d;
2556
2557 update_screen(vc);
2558 }
2559
2560 static void fbcon_modechanged(struct fb_info *info)
2561 {
2562 struct fbcon_ops *ops = info->fbcon_par;
2563 struct vc_data *vc;
2564 struct display *p;
2565 int rows, cols;
2566
2567 if (!ops || ops->currcon < 0)
2568 return;
2569 vc = vc_cons[ops->currcon].d;
2570 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2571 return;
2572
2573 p = &fb_display[vc->vc_num];
2574
2575 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2576
2577 if (CON_IS_VISIBLE(vc)) {
2578 var_to_display(p, &info->var, info);
2579 cols = info->var.xres / vc->vc_font.width;
2580 rows = info->var.yres / vc->vc_font.height;
2581 vc_resize(vc, cols, rows);
2582 updatescrollmode(p, info, vc);
2583 scrollback_max = 0;
2584 scrollback_current = 0;
2585 update_var(vc->vc_num, info);
2586 fbcon_set_palette(vc, color_table);
2587 update_screen(vc);
2588 if (softback_buf) {
2589 int l = fbcon_softback_size / vc->vc_size_row;
2590 if (l > 5)
2591 softback_end = softback_buf + l * vc->vc_size_row;
2592 else {
2593 /* Smaller scrollback makes no sense, and 0
2594 would screw the operation totally */
2595 softback_top = 0;
2596 }
2597 }
2598 }
2599 }
2600
2601 static int fbcon_mode_deleted(struct fb_info *info,
2602 struct fb_videomode *mode)
2603 {
2604 struct fb_info *fb_info;
2605 struct display *p;
2606 int i, j, found = 0;
2607
2608 /* before deletion, ensure that mode is not in use */
2609 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2610 j = con2fb_map[i];
2611 if (j == -1)
2612 continue;
2613 fb_info = registered_fb[j];
2614 if (fb_info != info)
2615 continue;
2616 p = &fb_display[i];
2617 if (!p || !p->mode)
2618 continue;
2619 if (fb_mode_is_equal(p->mode, mode)) {
2620 found = 1;
2621 break;
2622 }
2623 }
2624 return found;
2625 }
2626
2627 static int fbcon_fb_registered(int idx)
2628 {
2629 int ret = 0, i;
2630
2631 if (info_idx == -1) {
2632 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2633 if (con2fb_map_boot[i] == idx) {
2634 info_idx = idx;
2635 break;
2636 }
2637 }
2638 if (info_idx != -1)
2639 ret = fbcon_takeover(1);
2640 } else {
2641 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2642 if (con2fb_map_boot[i] == idx)
2643 set_con2fb_map(i, idx, 0);
2644 }
2645 }
2646
2647 return ret;
2648 }
2649
2650 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2651 {
2652 struct fbcon_ops *ops = info->fbcon_par;
2653 struct vc_data *vc;
2654
2655 if (!ops || ops->currcon < 0)
2656 return;
2657
2658 vc = vc_cons[ops->currcon].d;
2659 if (vc->vc_mode != KD_TEXT ||
2660 registered_fb[con2fb_map[ops->currcon]] != info)
2661 return;
2662
2663 if (CON_IS_VISIBLE(vc)) {
2664 if (blank)
2665 do_blank_screen(0);
2666 else
2667 do_unblank_screen(0);
2668 }
2669 ops->blank_state = blank;
2670 }
2671
2672 static void fbcon_new_modelist(struct fb_info *info)
2673 {
2674 int i;
2675 struct vc_data *vc;
2676 struct fb_var_screeninfo var;
2677 struct fb_videomode *mode;
2678
2679 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2680 if (registered_fb[con2fb_map[i]] != info)
2681 continue;
2682 if (!fb_display[i].mode)
2683 continue;
2684 vc = vc_cons[i].d;
2685 display_to_var(&var, &fb_display[i]);
2686 mode = fb_find_nearest_mode(&var, &info->modelist);
2687 fb_videomode_to_var(&var, mode);
2688
2689 if (vc)
2690 fbcon_set_disp(info, &var, vc);
2691 else
2692 fbcon_preset_disp(info, &var, i);
2693
2694 }
2695 }
2696
2697 static int fbcon_event_notify(struct notifier_block *self,
2698 unsigned long action, void *data)
2699 {
2700 struct fb_event *event = data;
2701 struct fb_info *info = event->info;
2702 struct fb_videomode *mode;
2703 struct fb_con2fbmap *con2fb;
2704 int ret = 0;
2705
2706 switch(action) {
2707 case FB_EVENT_SUSPEND:
2708 fbcon_suspended(info);
2709 break;
2710 case FB_EVENT_RESUME:
2711 fbcon_resumed(info);
2712 break;
2713 case FB_EVENT_MODE_CHANGE:
2714 fbcon_modechanged(info);
2715 break;
2716 case FB_EVENT_MODE_DELETE:
2717 mode = event->data;
2718 ret = fbcon_mode_deleted(info, mode);
2719 break;
2720 case FB_EVENT_FB_REGISTERED:
2721 ret = fbcon_fb_registered(info->node);
2722 break;
2723 case FB_EVENT_SET_CONSOLE_MAP:
2724 con2fb = event->data;
2725 ret = set_con2fb_map(con2fb->console - 1,
2726 con2fb->framebuffer, 1);
2727 break;
2728 case FB_EVENT_GET_CONSOLE_MAP:
2729 con2fb = event->data;
2730 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2731 break;
2732 case FB_EVENT_BLANK:
2733 fbcon_fb_blanked(info, *(int *)event->data);
2734 break;
2735 case FB_EVENT_NEW_MODELIST:
2736 fbcon_new_modelist(info);
2737 break;
2738 }
2739
2740 return ret;
2741 }
2742
2743 /*
2744 * The console `switch' structure for the frame buffer based console
2745 */
2746
2747 static const struct consw fb_con = {
2748 .owner = THIS_MODULE,
2749 .con_startup = fbcon_startup,
2750 .con_init = fbcon_init,
2751 .con_deinit = fbcon_deinit,
2752 .con_clear = fbcon_clear,
2753 .con_putc = fbcon_putc,
2754 .con_putcs = fbcon_putcs,
2755 .con_cursor = fbcon_cursor,
2756 .con_scroll = fbcon_scroll,
2757 .con_bmove = fbcon_bmove,
2758 .con_switch = fbcon_switch,
2759 .con_blank = fbcon_blank,
2760 .con_font_set = fbcon_set_font,
2761 .con_font_get = fbcon_get_font,
2762 .con_font_default = fbcon_set_def_font,
2763 .con_font_copy = fbcon_copy_font,
2764 .con_set_palette = fbcon_set_palette,
2765 .con_scrolldelta = fbcon_scrolldelta,
2766 .con_set_origin = fbcon_set_origin,
2767 .con_invert_region = fbcon_invert_region,
2768 .con_screen_pos = fbcon_screen_pos,
2769 .con_getxy = fbcon_getxy,
2770 .con_resize = fbcon_resize,
2771 };
2772
2773 static struct notifier_block fbcon_event_notifier = {
2774 .notifier_call = fbcon_event_notify,
2775 };
2776
2777 static int __init fb_console_init(void)
2778 {
2779 int i;
2780
2781 acquire_console_sem();
2782 fb_register_client(&fbcon_event_notifier);
2783 release_console_sem();
2784
2785 for (i = 0; i < MAX_NR_CONSOLES; i++)
2786 con2fb_map[i] = -1;
2787
2788 if (num_registered_fb) {
2789 for (i = 0; i < FB_MAX; i++) {
2790 if (registered_fb[i] != NULL) {
2791 info_idx = i;
2792 break;
2793 }
2794 }
2795 fbcon_takeover(0);
2796 }
2797
2798 return 0;
2799 }
2800
2801 module_init(fb_console_init);
2802
2803 #ifdef MODULE
2804
2805 static void __exit fb_console_exit(void)
2806 {
2807 acquire_console_sem();
2808 fb_unregister_client(&fbcon_event_notifier);
2809 release_console_sem();
2810 give_up_console(&fb_con);
2811 }
2812
2813 module_exit(fb_console_exit);
2814
2815 #endif
2816
2817 MODULE_LICENSE("GPL");
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