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[PATCH] fbcon: Consolidate redundant code
[linux-2.6.git] / drivers / video / console / fbcon.c
blob188053eafc6986d4e2a160359367fc65fdf7902a
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, &info->fix);
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 int col = ~(0xfff << (max(info->var.green.length,
234 max(info->var.red.length,
235 info->var.blue.length)))) & 0xff;
236
237 /* 0 or 1 */
238 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
239 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
240
241 if (console_blanked)
242 fg = bg;
243
244 color = (is_fg) ? fg : bg;
245 break;
246 }
247 case 2:
248 /*
249 * Scale down 16-colors to 4 colors. Default 4-color palette
250 * is grayscale. However, simply dividing the values by 4
251 * will not work, as colors 1, 2 and 3 will be scaled-down
252 * to zero rendering them invisible. So empirically convert
253 * colors to a sane 4-level grayscale.
254 */
255 switch (color) {
256 case 0:
257 color = 0; /* black */
258 break;
259 case 1 ... 6:
260 color = 2; /* white */
261 break;
262 case 7 ... 8:
263 color = 1; /* gray */
264 break;
265 default:
266 color = 3; /* intense white */
267 break;
268 }
269 break;
270 case 3:
271 /*
272 * Last 8 entries of default 16-color palette is a more intense
273 * version of the first 8 (i.e., same chrominance, different
274 * luminance).
275 */
276 color &= 7;
277 break;
278 }
279
280
281 return color;
282 }
283
284 static void fbcon_update_softback(struct vc_data *vc)
285 {
286 int l = fbcon_softback_size / vc->vc_size_row;
287
288 if (l > 5)
289 softback_end = softback_buf + l * vc->vc_size_row;
290 else
291 /* Smaller scrollback makes no sense, and 0 would screw
292 the operation totally */
293 softback_top = 0;
294 }
295
296 static void fb_flashcursor(void *private)
297 {
298 struct fb_info *info = private;
299 struct fbcon_ops *ops = info->fbcon_par;
300 struct display *p;
301 struct vc_data *vc = NULL;
302 int c;
303 int mode;
304
305 if (ops->currcon != -1)
306 vc = vc_cons[ops->currcon].d;
307
308 if (!vc || !CON_IS_VISIBLE(vc) ||
309 fbcon_is_inactive(vc, info) ||
310 registered_fb[con2fb_map[vc->vc_num]] != info ||
311 vc_cons[ops->currcon].d->vc_deccm != 1)
312 return;
313 acquire_console_sem();
314 p = &fb_display[vc->vc_num];
315 c = scr_readw((u16 *) vc->vc_pos);
316 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
317 CM_ERASE : CM_DRAW;
318 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
319 get_color(vc, info, c, 0));
320 release_console_sem();
321 }
322
323 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
324 static int cursor_blink_rate;
325 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
326 {
327 struct fb_info *info = dev_id;
328
329 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
330 schedule_work(&info->queue);
331 vbl_cursor_cnt = cursor_blink_rate;
332 }
333 return IRQ_HANDLED;
334 }
335 #endif
336
337 static void cursor_timer_handler(unsigned long dev_addr)
338 {
339 struct fb_info *info = (struct fb_info *) dev_addr;
340 struct fbcon_ops *ops = info->fbcon_par;
341
342 schedule_work(&info->queue);
343 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
344 }
345
346 static void fbcon_add_cursor_timer(struct fb_info *info)
347 {
348 struct fbcon_ops *ops = info->fbcon_par;
349
350 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
351 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
352 if (!info->queue.func)
353 INIT_WORK(&info->queue, fb_flashcursor, info);
354
355 init_timer(&ops->cursor_timer);
356 ops->cursor_timer.function = cursor_timer_handler;
357 ops->cursor_timer.expires = jiffies + HZ / 5;
358 ops->cursor_timer.data = (unsigned long ) info;
359 add_timer(&ops->cursor_timer);
360 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
361 }
362 }
363
364 static void fbcon_del_cursor_timer(struct fb_info *info)
365 {
366 struct fbcon_ops *ops = info->fbcon_par;
367
368 if (info->queue.func == fb_flashcursor &&
369 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
370 del_timer_sync(&ops->cursor_timer);
371 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
372 }
373 }
374
375 #ifndef MODULE
376 static int __init fb_console_setup(char *this_opt)
377 {
378 char *options;
379 int i, j;
380
381 if (!this_opt || !*this_opt)
382 return 0;
383
384 while ((options = strsep(&this_opt, ",")) != NULL) {
385 if (!strncmp(options, "font:", 5))
386 strcpy(fontname, options + 5);
387
388 if (!strncmp(options, "scrollback:", 11)) {
389 options += 11;
390 if (*options) {
391 fbcon_softback_size = simple_strtoul(options, &options, 0);
392 if (*options == 'k' || *options == 'K') {
393 fbcon_softback_size *= 1024;
394 options++;
395 }
396 if (*options != ',')
397 return 0;
398 options++;
399 } else
400 return 0;
401 }
402
403 if (!strncmp(options, "map:", 4)) {
404 options += 4;
405 if (*options)
406 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
407 if (!options[j])
408 j = 0;
409 con2fb_map_boot[i] =
410 (options[j++]-'0') % FB_MAX;
411 }
412 return 0;
413 }
414
415 if (!strncmp(options, "vc:", 3)) {
416 options += 3;
417 if (*options)
418 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
419 if (first_fb_vc < 0)
420 first_fb_vc = 0;
421 if (*options++ == '-')
422 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
423 fbcon_is_default = 0;
424 }
425 }
426 return 0;
427 }
428
429 __setup("fbcon=", fb_console_setup);
430 #endif
431
432 static int search_fb_in_map(int idx)
433 {
434 int i, retval = 0;
435
436 for (i = 0; i < MAX_NR_CONSOLES; i++) {
437 if (con2fb_map[i] == idx)
438 retval = 1;
439 }
440 return retval;
441 }
442
443 static int search_for_mapped_con(void)
444 {
445 int i, retval = 0;
446
447 for (i = 0; i < MAX_NR_CONSOLES; i++) {
448 if (con2fb_map[i] != -1)
449 retval = 1;
450 }
451 return retval;
452 }
453
454 static int fbcon_takeover(int show_logo)
455 {
456 int err, i;
457
458 if (!num_registered_fb)
459 return -ENODEV;
460
461 if (!show_logo)
462 logo_shown = FBCON_LOGO_DONTSHOW;
463
464 for (i = first_fb_vc; i <= last_fb_vc; i++)
465 con2fb_map[i] = info_idx;
466
467 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
468 fbcon_is_default);
469 if (err) {
470 for (i = first_fb_vc; i <= last_fb_vc; i++) {
471 con2fb_map[i] = -1;
472 }
473 info_idx = -1;
474 }
475
476 return err;
477 }
478
479 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
480 int cols, int rows, int new_cols, int new_rows)
481 {
482 /* Need to make room for the logo */
483 int cnt, erase = vc->vc_video_erase_char, step;
484 unsigned short *save = NULL, *r, *q;
485
486 /*
487 * remove underline attribute from erase character
488 * if black and white framebuffer.
489 */
490 if (fb_get_color_depth(&info->var, &info->fix) == 1)
491 erase &= ~0x400;
492 logo_height = fb_prepare_logo(info);
493 logo_lines = (logo_height + vc->vc_font.height - 1) /
494 vc->vc_font.height;
495 q = (unsigned short *) (vc->vc_origin +
496 vc->vc_size_row * rows);
497 step = logo_lines * cols;
498 for (r = q - logo_lines * cols; r < q; r++)
499 if (scr_readw(r) != vc->vc_video_erase_char)
500 break;
501 if (r != q && new_rows >= rows + logo_lines) {
502 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
503 if (save) {
504 int i = cols < new_cols ? cols : new_cols;
505 scr_memsetw(save, erase, logo_lines * new_cols * 2);
506 r = q - step;
507 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
508 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
509 r = q;
510 }
511 }
512 if (r == q) {
513 /* We can scroll screen down */
514 r = q - step - cols;
515 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
516 scr_memcpyw(r + step, r, vc->vc_size_row);
517 r -= cols;
518 }
519 if (!save) {
520 vc->vc_y += logo_lines;
521 vc->vc_pos += logo_lines * vc->vc_size_row;
522 }
523 }
524 scr_memsetw((unsigned short *) vc->vc_origin,
525 erase,
526 vc->vc_size_row * logo_lines);
527
528 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
529 fbcon_clear_margins(vc, 0);
530 update_screen(vc);
531 }
532
533 if (save) {
534 q = (unsigned short *) (vc->vc_origin +
535 vc->vc_size_row *
536 rows);
537 scr_memcpyw(q, save, logo_lines * new_cols * 2);
538 vc->vc_y += logo_lines;
539 vc->vc_pos += logo_lines * vc->vc_size_row;
540 kfree(save);
541 }
542
543 if (logo_lines > vc->vc_bottom) {
544 logo_shown = FBCON_LOGO_CANSHOW;
545 printk(KERN_INFO
546 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
547 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
548 logo_shown = FBCON_LOGO_DRAW;
549 vc->vc_top = logo_lines;
550 }
551 }
552
553 #ifdef CONFIG_FB_TILEBLITTING
554 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
555 struct display *p)
556 {
557 struct fbcon_ops *ops = info->fbcon_par;
558
559 if ((info->flags & FBINFO_MISC_TILEBLITTING))
560 fbcon_set_tileops(vc, info, p, ops);
561 else
562 fbcon_set_bitops(ops);
563 }
564 #else
565 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
566 struct display *p)
567 {
568 struct fbcon_ops *ops = info->fbcon_par;
569
570 info->flags &= ~FBINFO_MISC_TILEBLITTING;
571 fbcon_set_bitops(ops);
572 }
573 #endif /* CONFIG_MISC_TILEBLITTING */
574
575
576 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
577 int unit, int oldidx)
578 {
579 struct fbcon_ops *ops = NULL;
580 int err = 0;
581
582 if (!try_module_get(info->fbops->owner))
583 err = -ENODEV;
584
585 if (!err && info->fbops->fb_open &&
586 info->fbops->fb_open(info, 0))
587 err = -ENODEV;
588
589 if (!err) {
590 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
591 if (!ops)
592 err = -ENOMEM;
593 }
594
595 if (!err) {
596 memset(ops, 0, sizeof(struct fbcon_ops));
597 info->fbcon_par = ops;
598 set_blitting_type(vc, info, NULL);
599 }
600
601 if (err) {
602 con2fb_map[unit] = oldidx;
603 module_put(info->fbops->owner);
604 }
605
606 return err;
607 }
608
609 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
610 struct fb_info *newinfo, int unit,
611 int oldidx, int found)
612 {
613 struct fbcon_ops *ops = oldinfo->fbcon_par;
614 int err = 0;
615
616 if (oldinfo->fbops->fb_release &&
617 oldinfo->fbops->fb_release(oldinfo, 0)) {
618 con2fb_map[unit] = oldidx;
619 if (!found && newinfo->fbops->fb_release)
620 newinfo->fbops->fb_release(newinfo, 0);
621 if (!found)
622 module_put(newinfo->fbops->owner);
623 err = -ENODEV;
624 }
625
626 if (!err) {
627 fbcon_del_cursor_timer(oldinfo);
628 kfree(ops->cursor_state.mask);
629 kfree(ops->cursor_data);
630 kfree(oldinfo->fbcon_par);
631 oldinfo->fbcon_par = NULL;
632 module_put(oldinfo->fbops->owner);
633 }
634
635 return err;
636 }
637
638 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
639 int unit, int show_logo)
640 {
641 struct fbcon_ops *ops = info->fbcon_par;
642
643 ops->currcon = fg_console;
644
645 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
646 info->fbops->fb_set_par(info);
647
648 ops->flags |= FBCON_FLAGS_INIT;
649 ops->graphics = 0;
650
651 if (vc)
652 fbcon_set_disp(info, &info->var, vc);
653 else
654 fbcon_preset_disp(info, &info->var, unit);
655
656 if (show_logo) {
657 struct vc_data *fg_vc = vc_cons[fg_console].d;
658 struct fb_info *fg_info =
659 registered_fb[con2fb_map[fg_console]];
660
661 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
662 fg_vc->vc_rows, fg_vc->vc_cols,
663 fg_vc->vc_rows);
664 }
665
666 update_screen(vc_cons[fg_console].d);
667 }
668
669 /**
670 * set_con2fb_map - map console to frame buffer device
671 * @unit: virtual console number to map
672 * @newidx: frame buffer index to map virtual console to
673 * @user: user request
674 *
675 * Maps a virtual console @unit to a frame buffer device
676 * @newidx.
677 */
678 static int set_con2fb_map(int unit, int newidx, int user)
679 {
680 struct vc_data *vc = vc_cons[unit].d;
681 int oldidx = con2fb_map[unit];
682 struct fb_info *info = registered_fb[newidx];
683 struct fb_info *oldinfo = NULL;
684 int found, err = 0;
685
686 if (oldidx == newidx)
687 return 0;
688
689 if (!info)
690 err = -EINVAL;
691
692 if (!err && !search_for_mapped_con()) {
693 info_idx = newidx;
694 return fbcon_takeover(0);
695 }
696
697 if (oldidx != -1)
698 oldinfo = registered_fb[oldidx];
699
700 found = search_fb_in_map(newidx);
701
702 acquire_console_sem();
703 con2fb_map[unit] = newidx;
704 if (!err && !found)
705 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
706
707
708 /*
709 * If old fb is not mapped to any of the consoles,
710 * fbcon should release it.
711 */
712 if (!err && oldinfo && !search_fb_in_map(oldidx))
713 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
714 found);
715
716 if (!err) {
717 int show_logo = (fg_console == 0 && !user &&
718 logo_shown != FBCON_LOGO_DONTSHOW);
719
720 if (!found)
721 fbcon_add_cursor_timer(info);
722 con2fb_map_boot[unit] = newidx;
723 con2fb_init_display(vc, info, unit, show_logo);
724 }
725
726 release_console_sem();
727 return err;
728 }
729
730 /*
731 * Low Level Operations
732 */
733 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
734 static int var_to_display(struct display *disp,
735 struct fb_var_screeninfo *var,
736 struct fb_info *info)
737 {
738 disp->xres_virtual = var->xres_virtual;
739 disp->yres_virtual = var->yres_virtual;
740 disp->bits_per_pixel = var->bits_per_pixel;
741 disp->grayscale = var->grayscale;
742 disp->nonstd = var->nonstd;
743 disp->accel_flags = var->accel_flags;
744 disp->height = var->height;
745 disp->width = var->width;
746 disp->red = var->red;
747 disp->green = var->green;
748 disp->blue = var->blue;
749 disp->transp = var->transp;
750 disp->rotate = var->rotate;
751 disp->mode = fb_match_mode(var, &info->modelist);
752 if (disp->mode == NULL)
753 /* This should not happen */
754 return -EINVAL;
755 return 0;
756 }
757
758 static void display_to_var(struct fb_var_screeninfo *var,
759 struct display *disp)
760 {
761 fb_videomode_to_var(var, disp->mode);
762 var->xres_virtual = disp->xres_virtual;
763 var->yres_virtual = disp->yres_virtual;
764 var->bits_per_pixel = disp->bits_per_pixel;
765 var->grayscale = disp->grayscale;
766 var->nonstd = disp->nonstd;
767 var->accel_flags = disp->accel_flags;
768 var->height = disp->height;
769 var->width = disp->width;
770 var->red = disp->red;
771 var->green = disp->green;
772 var->blue = disp->blue;
773 var->transp = disp->transp;
774 var->rotate = disp->rotate;
775 }
776
777 static const char *fbcon_startup(void)
778 {
779 const char *display_desc = "frame buffer device";
780 struct display *p = &fb_display[fg_console];
781 struct vc_data *vc = vc_cons[fg_console].d;
782 const struct font_desc *font = NULL;
783 struct module *owner;
784 struct fb_info *info = NULL;
785 struct fbcon_ops *ops;
786 int rows, cols;
787 int irqres;
788
789 irqres = 1;
790 /*
791 * If num_registered_fb is zero, this is a call for the dummy part.
792 * The frame buffer devices weren't initialized yet.
793 */
794 if (!num_registered_fb || info_idx == -1)
795 return display_desc;
796 /*
797 * Instead of blindly using registered_fb[0], we use info_idx, set by
798 * fb_console_init();
799 */
800 info = registered_fb[info_idx];
801 if (!info)
802 return NULL;
803
804 owner = info->fbops->owner;
805 if (!try_module_get(owner))
806 return NULL;
807 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
808 module_put(owner);
809 return NULL;
810 }
811
812 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
813 if (!ops) {
814 module_put(owner);
815 return NULL;
816 }
817
818 memset(ops, 0, sizeof(struct fbcon_ops));
819 ops->currcon = -1;
820 ops->graphics = 1;
821 info->fbcon_par = ops;
822 set_blitting_type(vc, info, NULL);
823
824 if (info->fix.type != FB_TYPE_TEXT) {
825 if (fbcon_softback_size) {
826 if (!softback_buf) {
827 softback_buf =
828 (unsigned long)
829 kmalloc(fbcon_softback_size,
830 GFP_KERNEL);
831 if (!softback_buf) {
832 fbcon_softback_size = 0;
833 softback_top = 0;
834 }
835 }
836 } else {
837 if (softback_buf) {
838 kfree((void *) softback_buf);
839 softback_buf = 0;
840 softback_top = 0;
841 }
842 }
843 if (softback_buf)
844 softback_in = softback_top = softback_curr =
845 softback_buf;
846 softback_lines = 0;
847 }
848
849 /* Setup default font */
850 if (!p->fontdata) {
851 if (!fontname[0] || !(font = find_font(fontname)))
852 font = get_default_font(info->var.xres,
853 info->var.yres);
854 vc->vc_font.width = font->width;
855 vc->vc_font.height = font->height;
856 vc->vc_font.data = (void *)(p->fontdata = font->data);
857 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
858 }
859
860 cols = info->var.xres / vc->vc_font.width;
861 rows = info->var.yres / vc->vc_font.height;
862 vc_resize(vc, cols, rows);
863
864 DPRINTK("mode: %s\n", info->fix.id);
865 DPRINTK("visual: %d\n", info->fix.visual);
866 DPRINTK("res: %dx%d-%d\n", info->var.xres,
867 info->var.yres,
868 info->var.bits_per_pixel);
869
870 #ifdef CONFIG_ATARI
871 if (MACH_IS_ATARI) {
872 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
873 irqres =
874 request_irq(IRQ_AUTO_4, fb_vbl_handler,
875 IRQ_TYPE_PRIO, "framebuffer vbl",
876 info);
877 }
878 #endif /* CONFIG_ATARI */
879
880 #ifdef CONFIG_MAC
881 /*
882 * On a Macintoy, the VBL interrupt may or may not be active.
883 * As interrupt based cursor is more reliable and race free, we
884 * probe for VBL interrupts.
885 */
886 if (MACH_IS_MAC) {
887 int ct = 0;
888 /*
889 * Probe for VBL: set temp. handler ...
890 */
891 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
892 "framebuffer vbl", info);
893 vbl_detected = 0;
894
895 /*
896 * ... and spin for 20 ms ...
897 */
898 while (!vbl_detected && ++ct < 1000)
899 udelay(20);
900
901 if (ct == 1000)
902 printk
903 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
904
905 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
906
907 if (vbl_detected) {
908 /*
909 * interrupt based cursor ok
910 */
911 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
912 irqres =
913 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
914 "framebuffer vbl", info);
915 } else {
916 /*
917 * VBL not detected: fall through, use timer based cursor
918 */
919 irqres = 1;
920 }
921 }
922 #endif /* CONFIG_MAC */
923
924 fbcon_add_cursor_timer(info);
925 return display_desc;
926 }
927
928 static void fbcon_init(struct vc_data *vc, int init)
929 {
930 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
931 struct fbcon_ops *ops;
932 struct vc_data **default_mode = vc->vc_display_fg;
933 struct vc_data *svc = *default_mode;
934 struct display *t, *p = &fb_display[vc->vc_num];
935 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
936 int cap;
937
938 if (info_idx == -1 || info == NULL)
939 return;
940
941 cap = info->flags;
942
943 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
944 (info->fix.type == FB_TYPE_TEXT))
945 logo = 0;
946
947 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
948
949 if (var_to_display(p, &info->var, info))
950 return;
951
952 /* If we are not the first console on this
953 fb, copy the font from that console */
954 t = &fb_display[svc->vc_num];
955 if (!vc->vc_font.data) {
956 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
957 vc->vc_font.width = (*default_mode)->vc_font.width;
958 vc->vc_font.height = (*default_mode)->vc_font.height;
959 p->userfont = t->userfont;
960 if (p->userfont)
961 REFCOUNT(p->fontdata)++;
962 }
963 if (p->userfont)
964 charcnt = FNTCHARCNT(p->fontdata);
965 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
966 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
967 if (charcnt == 256) {
968 vc->vc_hi_font_mask = 0;
969 } else {
970 vc->vc_hi_font_mask = 0x100;
971 if (vc->vc_can_do_color)
972 vc->vc_complement_mask <<= 1;
973 }
974
975 if (!*svc->vc_uni_pagedir_loc)
976 con_set_default_unimap(svc);
977 if (!*vc->vc_uni_pagedir_loc)
978 con_copy_unimap(vc, svc);
979
980 cols = vc->vc_cols;
981 rows = vc->vc_rows;
982 new_cols = info->var.xres / vc->vc_font.width;
983 new_rows = info->var.yres / vc->vc_font.height;
984 vc_resize(vc, new_cols, new_rows);
985
986 ops = info->fbcon_par;
987 /*
988 * We must always set the mode. The mode of the previous console
989 * driver could be in the same resolution but we are using different
990 * hardware so we have to initialize the hardware.
991 *
992 * We need to do it in fbcon_init() to prevent screen corruption.
993 */
994 if (CON_IS_VISIBLE(vc)) {
995 if (info->fbops->fb_set_par &&
996 !(ops->flags & FBCON_FLAGS_INIT))
997 info->fbops->fb_set_par(info);
998 ops->flags |= FBCON_FLAGS_INIT;
999 }
1000
1001 ops->graphics = 0;
1002
1003 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1004 !(cap & FBINFO_HWACCEL_DISABLED))
1005 p->scrollmode = SCROLL_MOVE;
1006 else /* default to something safe */
1007 p->scrollmode = SCROLL_REDRAW;
1008
1009 /*
1010 * ++guenther: console.c:vc_allocate() relies on initializing
1011 * vc_{cols,rows}, but we must not set those if we are only
1012 * resizing the console.
1013 */
1014 if (!init) {
1015 vc->vc_cols = new_cols;
1016 vc->vc_rows = new_rows;
1017 }
1018
1019 if (logo)
1020 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1021
1022 if (vc == svc && softback_buf)
1023 fbcon_update_softback(vc);
1024 }
1025
1026 static void fbcon_deinit(struct vc_data *vc)
1027 {
1028 struct display *p = &fb_display[vc->vc_num];
1029
1030 if (info_idx != -1)
1031 return;
1032 fbcon_free_font(p);
1033 }
1034
1035 /* ====================================================================== */
1036
1037 /* fbcon_XXX routines - interface used by the world
1038 *
1039 * This system is now divided into two levels because of complications
1040 * caused by hardware scrolling. Top level functions:
1041 *
1042 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1043 *
1044 * handles y values in range [0, scr_height-1] that correspond to real
1045 * screen positions. y_wrap shift means that first line of bitmap may be
1046 * anywhere on this display. These functions convert lineoffsets to
1047 * bitmap offsets and deal with the wrap-around case by splitting blits.
1048 *
1049 * fbcon_bmove_physical_8() -- These functions fast implementations
1050 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1051 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1052 *
1053 * WARNING:
1054 *
1055 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1056 * Implies should only really hardware scroll in rows. Only reason for
1057 * restriction is simplicity & efficiency at the moment.
1058 */
1059
1060 static __inline__ int real_y(struct display *p, int ypos)
1061 {
1062 int rows = p->vrows;
1063
1064 ypos += p->yscroll;
1065 return ypos < rows ? ypos : ypos - rows;
1066 }
1067
1068
1069 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1070 int width)
1071 {
1072 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1073 struct fbcon_ops *ops = info->fbcon_par;
1074
1075 struct display *p = &fb_display[vc->vc_num];
1076 u_int y_break;
1077
1078 if (fbcon_is_inactive(vc, info))
1079 return;
1080
1081 if (!height || !width)
1082 return;
1083
1084 /* Split blits that cross physical y_wrap boundary */
1085
1086 y_break = p->vrows - p->yscroll;
1087 if (sy < y_break && sy + height - 1 >= y_break) {
1088 u_int b = y_break - sy;
1089 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1090 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1091 width);
1092 } else
1093 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1094 }
1095
1096 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1097 int count, int ypos, int xpos)
1098 {
1099 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1100 struct display *p = &fb_display[vc->vc_num];
1101 struct fbcon_ops *ops = info->fbcon_par;
1102
1103 if (!fbcon_is_inactive(vc, info))
1104 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1105 get_color(vc, info, scr_readw(s), 1),
1106 get_color(vc, info, scr_readw(s), 0));
1107 }
1108
1109 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1110 {
1111 unsigned short chr;
1112
1113 scr_writew(c, &chr);
1114 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1115 }
1116
1117 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1118 {
1119 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1120 struct fbcon_ops *ops = info->fbcon_par;
1121
1122 if (!fbcon_is_inactive(vc, info))
1123 ops->clear_margins(vc, info, bottom_only);
1124 }
1125
1126 static void fbcon_cursor(struct vc_data *vc, int mode)
1127 {
1128 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1129 struct fbcon_ops *ops = info->fbcon_par;
1130 struct display *p = &fb_display[vc->vc_num];
1131 int y;
1132 int c = scr_readw((u16 *) vc->vc_pos);
1133
1134 if (fbcon_is_inactive(vc, info))
1135 return;
1136
1137 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1138 if (mode & CM_SOFTBACK) {
1139 mode &= ~CM_SOFTBACK;
1140 y = softback_lines;
1141 } else {
1142 if (softback_lines)
1143 fbcon_set_origin(vc);
1144 y = 0;
1145 }
1146
1147 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1148 get_color(vc, info, c, 0));
1149 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1150 }
1151
1152 static int scrollback_phys_max = 0;
1153 static int scrollback_max = 0;
1154 static int scrollback_current = 0;
1155
1156 static int update_var(int con, struct fb_info *info)
1157 {
1158 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1159 return fb_pan_display(info, &info->var);
1160 return 0;
1161 }
1162
1163 /*
1164 * If no vc is existent yet, just set struct display
1165 */
1166 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1167 int unit)
1168 {
1169 struct display *p = &fb_display[unit];
1170 struct display *t = &fb_display[fg_console];
1171
1172 var->xoffset = var->yoffset = p->yscroll = 0;
1173 if (var_to_display(p, var, info))
1174 return;
1175
1176 p->fontdata = t->fontdata;
1177 p->userfont = t->userfont;
1178 if (p->userfont)
1179 REFCOUNT(p->fontdata)++;
1180 }
1181
1182 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1183 struct vc_data *vc)
1184 {
1185 struct display *p = &fb_display[vc->vc_num], *t;
1186 struct vc_data **default_mode = vc->vc_display_fg;
1187 struct vc_data *svc = *default_mode;
1188 int rows, cols, charcnt = 256;
1189
1190 var->xoffset = var->yoffset = p->yscroll = 0;
1191 if (var_to_display(p, var, info))
1192 return;
1193 t = &fb_display[svc->vc_num];
1194 if (!vc->vc_font.data) {
1195 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1196 vc->vc_font.width = (*default_mode)->vc_font.width;
1197 vc->vc_font.height = (*default_mode)->vc_font.height;
1198 p->userfont = t->userfont;
1199 if (p->userfont)
1200 REFCOUNT(p->fontdata)++;
1201 }
1202 if (p->userfont)
1203 charcnt = FNTCHARCNT(p->fontdata);
1204
1205 var->activate = FB_ACTIVATE_NOW;
1206 info->var.activate = var->activate;
1207 info->var.yoffset = info->var.xoffset = 0;
1208 fb_set_var(info, var);
1209
1210 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1211 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1212 if (charcnt == 256) {
1213 vc->vc_hi_font_mask = 0;
1214 } else {
1215 vc->vc_hi_font_mask = 0x100;
1216 if (vc->vc_can_do_color)
1217 vc->vc_complement_mask <<= 1;
1218 }
1219
1220 if (!*svc->vc_uni_pagedir_loc)
1221 con_set_default_unimap(svc);
1222 if (!*vc->vc_uni_pagedir_loc)
1223 con_copy_unimap(vc, svc);
1224
1225 cols = var->xres / vc->vc_font.width;
1226 rows = var->yres / vc->vc_font.height;
1227 vc_resize(vc, cols, rows);
1228 if (CON_IS_VISIBLE(vc)) {
1229 update_screen(vc);
1230 if (softback_buf)
1231 fbcon_update_softback(vc);
1232 }
1233 }
1234
1235 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1236 {
1237 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1238 struct display *p = &fb_display[vc->vc_num];
1239
1240 p->yscroll += count;
1241 if (p->yscroll >= p->vrows) /* Deal with wrap */
1242 p->yscroll -= p->vrows;
1243 info->var.xoffset = 0;
1244 info->var.yoffset = p->yscroll * vc->vc_font.height;
1245 info->var.vmode |= FB_VMODE_YWRAP;
1246 update_var(vc->vc_num, info);
1247 scrollback_max += count;
1248 if (scrollback_max > scrollback_phys_max)
1249 scrollback_max = scrollback_phys_max;
1250 scrollback_current = 0;
1251 }
1252
1253 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1254 {
1255 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1256 struct display *p = &fb_display[vc->vc_num];
1257
1258 p->yscroll -= count;
1259 if (p->yscroll < 0) /* Deal with wrap */
1260 p->yscroll += p->vrows;
1261 info->var.xoffset = 0;
1262 info->var.yoffset = p->yscroll * vc->vc_font.height;
1263 info->var.vmode |= FB_VMODE_YWRAP;
1264 update_var(vc->vc_num, info);
1265 scrollback_max -= count;
1266 if (scrollback_max < 0)
1267 scrollback_max = 0;
1268 scrollback_current = 0;
1269 }
1270
1271 static __inline__ void ypan_up(struct vc_data *vc, int count)
1272 {
1273 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1274 struct display *p = &fb_display[vc->vc_num];
1275 struct fbcon_ops *ops = info->fbcon_par;
1276
1277 p->yscroll += count;
1278 if (p->yscroll > p->vrows - vc->vc_rows) {
1279 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1280 0, 0, 0, vc->vc_rows, vc->vc_cols);
1281 p->yscroll -= p->vrows - vc->vc_rows;
1282 }
1283 info->var.xoffset = 0;
1284 info->var.yoffset = p->yscroll * vc->vc_font.height;
1285 info->var.vmode &= ~FB_VMODE_YWRAP;
1286 update_var(vc->vc_num, info);
1287 fbcon_clear_margins(vc, 1);
1288 scrollback_max += count;
1289 if (scrollback_max > scrollback_phys_max)
1290 scrollback_max = scrollback_phys_max;
1291 scrollback_current = 0;
1292 }
1293
1294 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1295 {
1296 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1297 struct display *p = &fb_display[vc->vc_num];
1298 int redraw = 0;
1299
1300 p->yscroll += count;
1301 if (p->yscroll > p->vrows - vc->vc_rows) {
1302 p->yscroll -= p->vrows - vc->vc_rows;
1303 redraw = 1;
1304 }
1305
1306 info->var.xoffset = 0;
1307 info->var.yoffset = p->yscroll * vc->vc_font.height;
1308 info->var.vmode &= ~FB_VMODE_YWRAP;
1309 if (redraw)
1310 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1311 update_var(vc->vc_num, info);
1312 fbcon_clear_margins(vc, 1);
1313 scrollback_max += count;
1314 if (scrollback_max > scrollback_phys_max)
1315 scrollback_max = scrollback_phys_max;
1316 scrollback_current = 0;
1317 }
1318
1319 static __inline__ void ypan_down(struct vc_data *vc, int count)
1320 {
1321 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1322 struct display *p = &fb_display[vc->vc_num];
1323 struct fbcon_ops *ops = info->fbcon_par;
1324
1325 p->yscroll -= count;
1326 if (p->yscroll < 0) {
1327 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1328 0, vc->vc_rows, vc->vc_cols);
1329 p->yscroll += p->vrows - vc->vc_rows;
1330 }
1331 info->var.xoffset = 0;
1332 info->var.yoffset = p->yscroll * vc->vc_font.height;
1333 info->var.vmode &= ~FB_VMODE_YWRAP;
1334 update_var(vc->vc_num, info);
1335 fbcon_clear_margins(vc, 1);
1336 scrollback_max -= count;
1337 if (scrollback_max < 0)
1338 scrollback_max = 0;
1339 scrollback_current = 0;
1340 }
1341
1342 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1343 {
1344 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1345 struct display *p = &fb_display[vc->vc_num];
1346 int redraw = 0;
1347
1348 p->yscroll -= count;
1349 if (p->yscroll < 0) {
1350 p->yscroll += p->vrows - vc->vc_rows;
1351 redraw = 1;
1352 }
1353 info->var.xoffset = 0;
1354 info->var.yoffset = p->yscroll * vc->vc_font.height;
1355 info->var.vmode &= ~FB_VMODE_YWRAP;
1356 if (redraw)
1357 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1358 update_var(vc->vc_num, info);
1359 fbcon_clear_margins(vc, 1);
1360 scrollback_max -= count;
1361 if (scrollback_max < 0)
1362 scrollback_max = 0;
1363 scrollback_current = 0;
1364 }
1365
1366 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1367 long delta)
1368 {
1369 int count = vc->vc_rows;
1370 unsigned short *d, *s;
1371 unsigned long n;
1372 int line = 0;
1373
1374 d = (u16 *) softback_curr;
1375 if (d == (u16 *) softback_in)
1376 d = (u16 *) vc->vc_origin;
1377 n = softback_curr + delta * vc->vc_size_row;
1378 softback_lines -= delta;
1379 if (delta < 0) {
1380 if (softback_curr < softback_top && n < softback_buf) {
1381 n += softback_end - softback_buf;
1382 if (n < softback_top) {
1383 softback_lines -=
1384 (softback_top - n) / vc->vc_size_row;
1385 n = softback_top;
1386 }
1387 } else if (softback_curr >= softback_top
1388 && n < softback_top) {
1389 softback_lines -=
1390 (softback_top - n) / vc->vc_size_row;
1391 n = softback_top;
1392 }
1393 } else {
1394 if (softback_curr > softback_in && n >= softback_end) {
1395 n += softback_buf - softback_end;
1396 if (n > softback_in) {
1397 n = softback_in;
1398 softback_lines = 0;
1399 }
1400 } else if (softback_curr <= softback_in && n > softback_in) {
1401 n = softback_in;
1402 softback_lines = 0;
1403 }
1404 }
1405 if (n == softback_curr)
1406 return;
1407 softback_curr = n;
1408 s = (u16 *) softback_curr;
1409 if (s == (u16 *) softback_in)
1410 s = (u16 *) vc->vc_origin;
1411 while (count--) {
1412 unsigned short *start;
1413 unsigned short *le;
1414 unsigned short c;
1415 int x = 0;
1416 unsigned short attr = 1;
1417
1418 start = s;
1419 le = advance_row(s, 1);
1420 do {
1421 c = scr_readw(s);
1422 if (attr != (c & 0xff00)) {
1423 attr = c & 0xff00;
1424 if (s > start) {
1425 fbcon_putcs(vc, start, s - start,
1426 line, x);
1427 x += s - start;
1428 start = s;
1429 }
1430 }
1431 if (c == scr_readw(d)) {
1432 if (s > start) {
1433 fbcon_putcs(vc, start, s - start,
1434 line, x);
1435 x += s - start + 1;
1436 start = s + 1;
1437 } else {
1438 x++;
1439 start++;
1440 }
1441 }
1442 s++;
1443 d++;
1444 } while (s < le);
1445 if (s > start)
1446 fbcon_putcs(vc, start, s - start, line, x);
1447 line++;
1448 if (d == (u16 *) softback_end)
1449 d = (u16 *) softback_buf;
1450 if (d == (u16 *) softback_in)
1451 d = (u16 *) vc->vc_origin;
1452 if (s == (u16 *) softback_end)
1453 s = (u16 *) softback_buf;
1454 if (s == (u16 *) softback_in)
1455 s = (u16 *) vc->vc_origin;
1456 }
1457 }
1458
1459 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1460 int line, int count, int dy)
1461 {
1462 unsigned short *s = (unsigned short *)
1463 (vc->vc_origin + vc->vc_size_row * line);
1464
1465 while (count--) {
1466 unsigned short *start = s;
1467 unsigned short *le = advance_row(s, 1);
1468 unsigned short c;
1469 int x = 0;
1470 unsigned short attr = 1;
1471
1472 do {
1473 c = scr_readw(s);
1474 if (attr != (c & 0xff00)) {
1475 attr = c & 0xff00;
1476 if (s > start) {
1477 fbcon_putcs(vc, start, s - start,
1478 dy, x);
1479 x += s - start;
1480 start = s;
1481 }
1482 }
1483 console_conditional_schedule();
1484 s++;
1485 } while (s < le);
1486 if (s > start)
1487 fbcon_putcs(vc, start, s - start, dy, x);
1488 console_conditional_schedule();
1489 dy++;
1490 }
1491 }
1492
1493 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1494 int line, int count, int offset)
1495 {
1496 unsigned short *d = (unsigned short *)
1497 (vc->vc_origin + vc->vc_size_row * line);
1498 unsigned short *s = d + offset;
1499
1500 while (count--) {
1501 unsigned short *start = s;
1502 unsigned short *le = advance_row(s, 1);
1503 unsigned short c;
1504 int x = 0;
1505 unsigned short attr = 1;
1506
1507 do {
1508 c = scr_readw(s);
1509 if (attr != (c & 0xff00)) {
1510 attr = c & 0xff00;
1511 if (s > start) {
1512 fbcon_putcs(vc, start, s - start,
1513 line, x);
1514 x += s - start;
1515 start = s;
1516 }
1517 }
1518 if (c == scr_readw(d)) {
1519 if (s > start) {
1520 fbcon_putcs(vc, start, s - start,
1521 line, x);
1522 x += s - start + 1;
1523 start = s + 1;
1524 } else {
1525 x++;
1526 start++;
1527 }
1528 }
1529 scr_writew(c, d);
1530 console_conditional_schedule();
1531 s++;
1532 d++;
1533 } while (s < le);
1534 if (s > start)
1535 fbcon_putcs(vc, start, s - start, line, x);
1536 console_conditional_schedule();
1537 if (offset > 0)
1538 line++;
1539 else {
1540 line--;
1541 /* NOTE: We subtract two lines from these pointers */
1542 s -= vc->vc_size_row;
1543 d -= vc->vc_size_row;
1544 }
1545 }
1546 }
1547
1548 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1549 int count)
1550 {
1551 unsigned short *p;
1552
1553 if (vc->vc_num != fg_console)
1554 return;
1555 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1556
1557 while (count) {
1558 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1559 count--;
1560 p = advance_row(p, 1);
1561 softback_in += vc->vc_size_row;
1562 if (softback_in == softback_end)
1563 softback_in = softback_buf;
1564 if (softback_in == softback_top) {
1565 softback_top += vc->vc_size_row;
1566 if (softback_top == softback_end)
1567 softback_top = softback_buf;
1568 }
1569 }
1570 softback_curr = softback_in;
1571 }
1572
1573 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1574 int count)
1575 {
1576 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1577 struct display *p = &fb_display[vc->vc_num];
1578 struct fbcon_ops *ops = info->fbcon_par;
1579 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1580
1581 if (fbcon_is_inactive(vc, info))
1582 return -EINVAL;
1583
1584 fbcon_cursor(vc, CM_ERASE);
1585
1586 /*
1587 * ++Geert: Only use ywrap/ypan if the console is in text mode
1588 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1589 * whole screen (prevents flicker).
1590 */
1591
1592 switch (dir) {
1593 case SM_UP:
1594 if (count > vc->vc_rows) /* Maximum realistic size */
1595 count = vc->vc_rows;
1596 if (softback_top)
1597 fbcon_softback_note(vc, t, count);
1598 if (logo_shown >= 0)
1599 goto redraw_up;
1600 switch (p->scrollmode) {
1601 case SCROLL_MOVE:
1602 ops->bmove(vc, info, t + count, 0, t, 0,
1603 b - t - count, vc->vc_cols);
1604 ops->clear(vc, info, b - count, 0, count,
1605 vc->vc_cols);
1606 break;
1607
1608 case SCROLL_WRAP_MOVE:
1609 if (b - t - count > 3 * vc->vc_rows >> 2) {
1610 if (t > 0)
1611 fbcon_bmove(vc, 0, 0, count, 0, t,
1612 vc->vc_cols);
1613 ywrap_up(vc, count);
1614 if (vc->vc_rows - b > 0)
1615 fbcon_bmove(vc, b - count, 0, b, 0,
1616 vc->vc_rows - b,
1617 vc->vc_cols);
1618 } else if (info->flags & FBINFO_READS_FAST)
1619 fbcon_bmove(vc, t + count, 0, t, 0,
1620 b - t - count, vc->vc_cols);
1621 else
1622 goto redraw_up;
1623 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1624 break;
1625
1626 case SCROLL_PAN_REDRAW:
1627 if ((p->yscroll + count <=
1628 2 * (p->vrows - vc->vc_rows))
1629 && ((!scroll_partial && (b - t == vc->vc_rows))
1630 || (scroll_partial
1631 && (b - t - count >
1632 3 * vc->vc_rows >> 2)))) {
1633 if (t > 0)
1634 fbcon_redraw_move(vc, p, 0, t, count);
1635 ypan_up_redraw(vc, t, count);
1636 if (vc->vc_rows - b > 0)
1637 fbcon_redraw_move(vc, p, b - count,
1638 vc->vc_rows - b, b);
1639 } else
1640 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1641 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1642 break;
1643
1644 case SCROLL_PAN_MOVE:
1645 if ((p->yscroll + count <=
1646 2 * (p->vrows - vc->vc_rows))
1647 && ((!scroll_partial && (b - t == vc->vc_rows))
1648 || (scroll_partial
1649 && (b - t - count >
1650 3 * vc->vc_rows >> 2)))) {
1651 if (t > 0)
1652 fbcon_bmove(vc, 0, 0, count, 0, t,
1653 vc->vc_cols);
1654 ypan_up(vc, count);
1655 if (vc->vc_rows - b > 0)
1656 fbcon_bmove(vc, b - count, 0, b, 0,
1657 vc->vc_rows - b,
1658 vc->vc_cols);
1659 } else if (info->flags & FBINFO_READS_FAST)
1660 fbcon_bmove(vc, t + count, 0, t, 0,
1661 b - t - count, vc->vc_cols);
1662 else
1663 goto redraw_up;
1664 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1665 break;
1666
1667 case SCROLL_REDRAW:
1668 redraw_up:
1669 fbcon_redraw(vc, p, t, b - t - count,
1670 count * vc->vc_cols);
1671 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1672 scr_memsetw((unsigned short *) (vc->vc_origin +
1673 vc->vc_size_row *
1674 (b - count)),
1675 vc->vc_video_erase_char,
1676 vc->vc_size_row * count);
1677 return 1;
1678 }
1679 break;
1680
1681 case SM_DOWN:
1682 if (count > vc->vc_rows) /* Maximum realistic size */
1683 count = vc->vc_rows;
1684 if (logo_shown >= 0)
1685 goto redraw_down;
1686 switch (p->scrollmode) {
1687 case SCROLL_MOVE:
1688 ops->bmove(vc, info, t, 0, t + count, 0,
1689 b - t - count, vc->vc_cols);
1690 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1691 break;
1692
1693 case SCROLL_WRAP_MOVE:
1694 if (b - t - count > 3 * vc->vc_rows >> 2) {
1695 if (vc->vc_rows - b > 0)
1696 fbcon_bmove(vc, b, 0, b - count, 0,
1697 vc->vc_rows - b,
1698 vc->vc_cols);
1699 ywrap_down(vc, count);
1700 if (t > 0)
1701 fbcon_bmove(vc, count, 0, 0, 0, t,
1702 vc->vc_cols);
1703 } else if (info->flags & FBINFO_READS_FAST)
1704 fbcon_bmove(vc, t, 0, t + count, 0,
1705 b - t - count, vc->vc_cols);
1706 else
1707 goto redraw_down;
1708 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1709 break;
1710
1711 case SCROLL_PAN_MOVE:
1712 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1713 && ((!scroll_partial && (b - t == vc->vc_rows))
1714 || (scroll_partial
1715 && (b - t - count >
1716 3 * vc->vc_rows >> 2)))) {
1717 if (vc->vc_rows - b > 0)
1718 fbcon_bmove(vc, b, 0, b - count, 0,
1719 vc->vc_rows - b,
1720 vc->vc_cols);
1721 ypan_down(vc, count);
1722 if (t > 0)
1723 fbcon_bmove(vc, count, 0, 0, 0, t,
1724 vc->vc_cols);
1725 } else if (info->flags & FBINFO_READS_FAST)
1726 fbcon_bmove(vc, t, 0, t + count, 0,
1727 b - t - count, vc->vc_cols);
1728 else
1729 goto redraw_down;
1730 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1731 break;
1732
1733 case SCROLL_PAN_REDRAW:
1734 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1735 && ((!scroll_partial && (b - t == vc->vc_rows))
1736 || (scroll_partial
1737 && (b - t - count >
1738 3 * vc->vc_rows >> 2)))) {
1739 if (vc->vc_rows - b > 0)
1740 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1741 b - count);
1742 ypan_down_redraw(vc, t, count);
1743 if (t > 0)
1744 fbcon_redraw_move(vc, p, count, t, 0);
1745 } else
1746 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1747 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1748 break;
1749
1750 case SCROLL_REDRAW:
1751 redraw_down:
1752 fbcon_redraw(vc, p, b - 1, b - t - count,
1753 -count * vc->vc_cols);
1754 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1755 scr_memsetw((unsigned short *) (vc->vc_origin +
1756 vc->vc_size_row *
1757 t),
1758 vc->vc_video_erase_char,
1759 vc->vc_size_row * count);
1760 return 1;
1761 }
1762 }
1763 return 0;
1764 }
1765
1766
1767 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1768 int height, int width)
1769 {
1770 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1771 struct display *p = &fb_display[vc->vc_num];
1772
1773 if (fbcon_is_inactive(vc, info))
1774 return;
1775
1776 if (!width || !height)
1777 return;
1778
1779 /* Split blits that cross physical y_wrap case.
1780 * Pathological case involves 4 blits, better to use recursive
1781 * code rather than unrolled case
1782 *
1783 * Recursive invocations don't need to erase the cursor over and
1784 * over again, so we use fbcon_bmove_rec()
1785 */
1786 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1787 p->vrows - p->yscroll);
1788 }
1789
1790 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1791 int dy, int dx, int height, int width, u_int y_break)
1792 {
1793 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1794 struct fbcon_ops *ops = info->fbcon_par;
1795 u_int b;
1796
1797 if (sy < y_break && sy + height > y_break) {
1798 b = y_break - sy;
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
1813 if (dy < y_break && dy + height > y_break) {
1814 b = y_break - dy;
1815 if (dy < sy) { /* Avoid trashing self */
1816 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1817 y_break);
1818 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1819 height - b, width, y_break);
1820 } else {
1821 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1822 height - b, width, y_break);
1823 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1824 y_break);
1825 }
1826 return;
1827 }
1828 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1829 height, width);
1830 }
1831
1832 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1833 struct vc_data *vc)
1834 {
1835 int fh = vc->vc_font.height;
1836 int cap = info->flags;
1837 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1838 && divides(info->fix.ypanstep, vc->vc_font.height)
1839 && info->var.yres_virtual > info->var.yres;
1840 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1841 && divides(info->fix.ywrapstep, vc->vc_font.height)
1842 && divides(vc->vc_font.height, info->var.yres_virtual);
1843 int reading_fast = cap & FBINFO_READS_FAST;
1844 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1845 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1846
1847 p->vrows = info->var.yres_virtual/fh;
1848 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1849 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1850 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1851 info->var.yres % fh))
1852 p->vrows--;
1853
1854 if (good_wrap || good_pan) {
1855 if (reading_fast || fast_copyarea)
1856 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1857 else
1858 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1859 SCROLL_PAN_REDRAW;
1860 } else {
1861 if (reading_fast || (fast_copyarea && !fast_imageblit))
1862 p->scrollmode = SCROLL_MOVE;
1863 else
1864 p->scrollmode = SCROLL_REDRAW;
1865 }
1866 }
1867
1868 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1869 unsigned int height)
1870 {
1871 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1872 struct display *p = &fb_display[vc->vc_num];
1873 struct fb_var_screeninfo var = info->var;
1874 int x_diff, y_diff;
1875 int fw = vc->vc_font.width;
1876 int fh = vc->vc_font.height;
1877
1878 var.xres = width * fw;
1879 var.yres = height * fh;
1880 x_diff = info->var.xres - var.xres;
1881 y_diff = info->var.yres - var.yres;
1882 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1883 struct fb_videomode *mode;
1884
1885 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1886 mode = fb_find_best_mode(&var, &info->modelist);
1887 if (mode == NULL)
1888 return -EINVAL;
1889 fb_videomode_to_var(&var, mode);
1890 if (width > var.xres/fw || height > var.yres/fh)
1891 return -EINVAL;
1892 /*
1893 * The following can probably have any value... Do we need to
1894 * set all of them?
1895 */
1896 var.bits_per_pixel = p->bits_per_pixel;
1897 var.xres_virtual = p->xres_virtual;
1898 var.yres_virtual = p->yres_virtual;
1899 var.accel_flags = p->accel_flags;
1900 var.width = p->width;
1901 var.height = p->height;
1902 var.red = p->red;
1903 var.green = p->green;
1904 var.blue = p->blue;
1905 var.transp = p->transp;
1906 var.nonstd = p->nonstd;
1907
1908 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1909 if (CON_IS_VISIBLE(vc)) {
1910 var.activate = FB_ACTIVATE_NOW |
1911 FB_ACTIVATE_FORCE;
1912 fb_set_var(info, &var);
1913 }
1914 var_to_display(p, &info->var, info);
1915 }
1916 updatescrollmode(p, info, vc);
1917 return 0;
1918 }
1919
1920 static int fbcon_switch(struct vc_data *vc)
1921 {
1922 struct fb_info *info, *old_info = NULL;
1923 struct display *p = &fb_display[vc->vc_num];
1924 struct fb_var_screeninfo var;
1925 int i, prev_console;
1926
1927 info = registered_fb[con2fb_map[vc->vc_num]];
1928
1929 if (softback_top) {
1930 if (softback_lines)
1931 fbcon_set_origin(vc);
1932 softback_top = softback_curr = softback_in = softback_buf;
1933 softback_lines = 0;
1934 fbcon_update_softback(vc);
1935 }
1936
1937 if (logo_shown >= 0) {
1938 struct vc_data *conp2 = vc_cons[logo_shown].d;
1939
1940 if (conp2->vc_top == logo_lines
1941 && conp2->vc_bottom == conp2->vc_rows)
1942 conp2->vc_top = 0;
1943 logo_shown = FBCON_LOGO_CANSHOW;
1944 }
1945
1946 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
1947 if (prev_console != -1)
1948 old_info = registered_fb[con2fb_map[prev_console]];
1949 /*
1950 * FIXME: If we have multiple fbdev's loaded, we need to
1951 * update all info->currcon. Perhaps, we can place this
1952 * in a centralized structure, but this might break some
1953 * drivers.
1954 *
1955 * info->currcon = vc->vc_num;
1956 */
1957 for (i = 0; i < FB_MAX; i++) {
1958 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1959 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1960
1961 ops->currcon = vc->vc_num;
1962 }
1963 }
1964 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1965 display_to_var(&var, p);
1966 var.activate = FB_ACTIVATE_NOW;
1967
1968 /*
1969 * make sure we don't unnecessarily trip the memcmp()
1970 * in fb_set_var()
1971 */
1972 info->var.activate = var.activate;
1973 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1974 fb_set_var(info, &var);
1975
1976 if (old_info != NULL && old_info != info) {
1977 if (info->fbops->fb_set_par)
1978 info->fbops->fb_set_par(info);
1979 fbcon_del_cursor_timer(old_info);
1980 fbcon_add_cursor_timer(info);
1981 }
1982
1983 set_blitting_type(vc, info, p);
1984 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1985
1986 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1987 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1988 updatescrollmode(p, info, vc);
1989
1990 switch (p->scrollmode) {
1991 case SCROLL_WRAP_MOVE:
1992 scrollback_phys_max = p->vrows - vc->vc_rows;
1993 break;
1994 case SCROLL_PAN_MOVE:
1995 case SCROLL_PAN_REDRAW:
1996 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
1997 if (scrollback_phys_max < 0)
1998 scrollback_phys_max = 0;
1999 break;
2000 default:
2001 scrollback_phys_max = 0;
2002 break;
2003 }
2004 scrollback_max = 0;
2005 scrollback_current = 0;
2006
2007 update_var(vc->vc_num, info);
2008 fbcon_set_palette(vc, color_table);
2009 fbcon_clear_margins(vc, 0);
2010
2011 if (logo_shown == FBCON_LOGO_DRAW) {
2012
2013 logo_shown = fg_console;
2014 /* This is protected above by initmem_freed */
2015 fb_show_logo(info);
2016 update_region(vc,
2017 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2018 vc->vc_size_row * (vc->vc_bottom -
2019 vc->vc_top) / 2);
2020 return 0;
2021 }
2022 return 1;
2023 }
2024
2025 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2026 int blank)
2027 {
2028 if (blank) {
2029 unsigned short charmask = vc->vc_hi_font_mask ?
2030 0x1ff : 0xff;
2031 unsigned short oldc;
2032
2033 oldc = vc->vc_video_erase_char;
2034 vc->vc_video_erase_char &= charmask;
2035 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2036 vc->vc_video_erase_char = oldc;
2037 }
2038 }
2039
2040 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2041 {
2042 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2043 struct fbcon_ops *ops = info->fbcon_par;
2044
2045 if (mode_switch) {
2046 struct fb_var_screeninfo var = info->var;
2047
2048 ops->graphics = 1;
2049
2050 if (!blank) {
2051 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2052 fb_set_var(info, &var);
2053 ops->graphics = 0;
2054 }
2055 }
2056
2057 if (!fbcon_is_inactive(vc, info)) {
2058 if (ops->blank_state != blank) {
2059 ops->blank_state = blank;
2060 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2061 ops->cursor_flash = (!blank);
2062
2063 if (fb_blank(info, blank))
2064 fbcon_generic_blank(vc, info, blank);
2065 }
2066
2067 if (!blank)
2068 update_screen(vc);
2069 }
2070
2071 if (!blank)
2072 fbcon_add_cursor_timer(info);
2073 else
2074 fbcon_del_cursor_timer(info);
2075
2076 return 0;
2077 }
2078
2079 static void fbcon_free_font(struct display *p)
2080 {
2081 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2082 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2083 p->fontdata = NULL;
2084 p->userfont = 0;
2085 }
2086
2087 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2088 {
2089 u8 *fontdata = vc->vc_font.data;
2090 u8 *data = font->data;
2091 int i, j;
2092
2093 font->width = vc->vc_font.width;
2094 font->height = vc->vc_font.height;
2095 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2096 if (!font->data)
2097 return 0;
2098
2099 if (font->width <= 8) {
2100 j = vc->vc_font.height;
2101 for (i = 0; i < font->charcount; i++) {
2102 memcpy(data, fontdata, j);
2103 memset(data + j, 0, 32 - j);
2104 data += 32;
2105 fontdata += j;
2106 }
2107 } else if (font->width <= 16) {
2108 j = vc->vc_font.height * 2;
2109 for (i = 0; i < font->charcount; i++) {
2110 memcpy(data, fontdata, j);
2111 memset(data + j, 0, 64 - j);
2112 data += 64;
2113 fontdata += j;
2114 }
2115 } else if (font->width <= 24) {
2116 for (i = 0; i < font->charcount; i++) {
2117 for (j = 0; j < vc->vc_font.height; j++) {
2118 *data++ = fontdata[0];
2119 *data++ = fontdata[1];
2120 *data++ = fontdata[2];
2121 fontdata += sizeof(u32);
2122 }
2123 memset(data, 0, 3 * (32 - j));
2124 data += 3 * (32 - j);
2125 }
2126 } else {
2127 j = vc->vc_font.height * 4;
2128 for (i = 0; i < font->charcount; i++) {
2129 memcpy(data, fontdata, j);
2130 memset(data + j, 0, 128 - j);
2131 data += 128;
2132 fontdata += j;
2133 }
2134 }
2135 return 0;
2136 }
2137
2138 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2139 const u8 * data, int userfont)
2140 {
2141 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2142 struct display *p = &fb_display[vc->vc_num];
2143 int resize;
2144 int cnt;
2145 char *old_data = NULL;
2146
2147 if (CON_IS_VISIBLE(vc) && softback_lines)
2148 fbcon_set_origin(vc);
2149
2150 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2151 if (p->userfont)
2152 old_data = vc->vc_font.data;
2153 if (userfont)
2154 cnt = FNTCHARCNT(data);
2155 else
2156 cnt = 256;
2157 vc->vc_font.data = (void *)(p->fontdata = data);
2158 if ((p->userfont = userfont))
2159 REFCOUNT(data)++;
2160 vc->vc_font.width = w;
2161 vc->vc_font.height = h;
2162 if (vc->vc_hi_font_mask && cnt == 256) {
2163 vc->vc_hi_font_mask = 0;
2164 if (vc->vc_can_do_color) {
2165 vc->vc_complement_mask >>= 1;
2166 vc->vc_s_complement_mask >>= 1;
2167 }
2168
2169 /* ++Edmund: reorder the attribute bits */
2170 if (vc->vc_can_do_color) {
2171 unsigned short *cp =
2172 (unsigned short *) vc->vc_origin;
2173 int count = vc->vc_screenbuf_size / 2;
2174 unsigned short c;
2175 for (; count > 0; count--, cp++) {
2176 c = scr_readw(cp);
2177 scr_writew(((c & 0xfe00) >> 1) |
2178 (c & 0xff), cp);
2179 }
2180 c = vc->vc_video_erase_char;
2181 vc->vc_video_erase_char =
2182 ((c & 0xfe00) >> 1) | (c & 0xff);
2183 vc->vc_attr >>= 1;
2184 }
2185 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2186 vc->vc_hi_font_mask = 0x100;
2187 if (vc->vc_can_do_color) {
2188 vc->vc_complement_mask <<= 1;
2189 vc->vc_s_complement_mask <<= 1;
2190 }
2191
2192 /* ++Edmund: reorder the attribute bits */
2193 {
2194 unsigned short *cp =
2195 (unsigned short *) vc->vc_origin;
2196 int count = vc->vc_screenbuf_size / 2;
2197 unsigned short c;
2198 for (; count > 0; count--, cp++) {
2199 unsigned short newc;
2200 c = scr_readw(cp);
2201 if (vc->vc_can_do_color)
2202 newc =
2203 ((c & 0xff00) << 1) | (c &
2204 0xff);
2205 else
2206 newc = c & ~0x100;
2207 scr_writew(newc, cp);
2208 }
2209 c = vc->vc_video_erase_char;
2210 if (vc->vc_can_do_color) {
2211 vc->vc_video_erase_char =
2212 ((c & 0xff00) << 1) | (c & 0xff);
2213 vc->vc_attr <<= 1;
2214 } else
2215 vc->vc_video_erase_char = c & ~0x100;
2216 }
2217
2218 }
2219
2220 if (resize) {
2221 /* reset wrap/pan */
2222 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2223 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2224 if (CON_IS_VISIBLE(vc) && softback_buf)
2225 fbcon_update_softback(vc);
2226 } else if (CON_IS_VISIBLE(vc)
2227 && vc->vc_mode == KD_TEXT) {
2228 fbcon_clear_margins(vc, 0);
2229 update_screen(vc);
2230 }
2231
2232 if (old_data && (--REFCOUNT(old_data) == 0))
2233 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2234 return 0;
2235 }
2236
2237 static int fbcon_copy_font(struct vc_data *vc, int con)
2238 {
2239 struct display *od = &fb_display[con];
2240 struct console_font *f = &vc->vc_font;
2241
2242 if (od->fontdata == f->data)
2243 return 0; /* already the same font... */
2244 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2245 }
2246
2247 /*
2248 * User asked to set font; we are guaranteed that
2249 * a) width and height are in range 1..32
2250 * b) charcount does not exceed 512
2251 * but lets not assume that, since someone might someday want to use larger
2252 * fonts. And charcount of 512 is small for unicode support.
2253 *
2254 * However, user space gives the font in 32 rows , regardless of
2255 * actual font height. So a new API is needed if support for larger fonts
2256 * is ever implemented.
2257 */
2258
2259 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2260 {
2261 unsigned charcount = font->charcount;
2262 int w = font->width;
2263 int h = font->height;
2264 int size;
2265 int i, csum;
2266 u8 *new_data, *data = font->data;
2267 int pitch = (font->width+7) >> 3;
2268
2269 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2270 * If not this check should be changed to charcount < 256 */
2271 if (charcount != 256 && charcount != 512)
2272 return -EINVAL;
2273
2274 size = h * pitch * charcount;
2275
2276 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2277
2278 if (!new_data)
2279 return -ENOMEM;
2280
2281 new_data += FONT_EXTRA_WORDS * sizeof(int);
2282 FNTSIZE(new_data) = size;
2283 FNTCHARCNT(new_data) = charcount;
2284 REFCOUNT(new_data) = 0; /* usage counter */
2285 for (i=0; i< charcount; i++) {
2286 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2287 }
2288
2289 /* Since linux has a nice crc32 function use it for counting font
2290 * checksums. */
2291 csum = crc32(0, new_data, size);
2292
2293 FNTSUM(new_data) = csum;
2294 /* Check if the same font is on some other console already */
2295 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2296 struct vc_data *tmp = vc_cons[i].d;
2297
2298 if (fb_display[i].userfont &&
2299 fb_display[i].fontdata &&
2300 FNTSUM(fb_display[i].fontdata) == csum &&
2301 FNTSIZE(fb_display[i].fontdata) == size &&
2302 tmp->vc_font.width == w &&
2303 !memcmp(fb_display[i].fontdata, new_data, size)) {
2304 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2305 new_data = (u8 *)fb_display[i].fontdata;
2306 break;
2307 }
2308 }
2309 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2310 }
2311
2312 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2313 {
2314 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2315 const struct font_desc *f;
2316
2317 if (!name)
2318 f = get_default_font(info->var.xres, info->var.yres);
2319 else if (!(f = find_font(name)))
2320 return -ENOENT;
2321
2322 font->width = f->width;
2323 font->height = f->height;
2324 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2325 }
2326
2327 static u16 palette_red[16];
2328 static u16 palette_green[16];
2329 static u16 palette_blue[16];
2330
2331 static struct fb_cmap palette_cmap = {
2332 0, 16, palette_red, palette_green, palette_blue, NULL
2333 };
2334
2335 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2336 {
2337 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2338 int i, j, k, depth;
2339 u8 val;
2340
2341 if (fbcon_is_inactive(vc, info))
2342 return -EINVAL;
2343
2344 if (!CON_IS_VISIBLE(vc))
2345 return 0;
2346
2347 depth = fb_get_color_depth(&info->var, &info->fix);
2348 if (depth > 3) {
2349 for (i = j = 0; i < 16; i++) {
2350 k = table[i];
2351 val = vc->vc_palette[j++];
2352 palette_red[k] = (val << 8) | val;
2353 val = vc->vc_palette[j++];
2354 palette_green[k] = (val << 8) | val;
2355 val = vc->vc_palette[j++];
2356 palette_blue[k] = (val << 8) | val;
2357 }
2358 palette_cmap.len = 16;
2359 palette_cmap.start = 0;
2360 /*
2361 * If framebuffer is capable of less than 16 colors,
2362 * use default palette of fbcon.
2363 */
2364 } else
2365 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2366
2367 return fb_set_cmap(&palette_cmap, info);
2368 }
2369
2370 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2371 {
2372 unsigned long p;
2373 int line;
2374
2375 if (vc->vc_num != fg_console || !softback_lines)
2376 return (u16 *) (vc->vc_origin + offset);
2377 line = offset / vc->vc_size_row;
2378 if (line >= softback_lines)
2379 return (u16 *) (vc->vc_origin + offset -
2380 softback_lines * vc->vc_size_row);
2381 p = softback_curr + offset;
2382 if (p >= softback_end)
2383 p += softback_buf - softback_end;
2384 return (u16 *) p;
2385 }
2386
2387 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2388 int *px, int *py)
2389 {
2390 unsigned long ret;
2391 int x, y;
2392
2393 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2394 unsigned long offset = (pos - vc->vc_origin) / 2;
2395
2396 x = offset % vc->vc_cols;
2397 y = offset / vc->vc_cols;
2398 if (vc->vc_num == fg_console)
2399 y += softback_lines;
2400 ret = pos + (vc->vc_cols - x) * 2;
2401 } else if (vc->vc_num == fg_console && softback_lines) {
2402 unsigned long offset = pos - softback_curr;
2403
2404 if (pos < softback_curr)
2405 offset += softback_end - softback_buf;
2406 offset /= 2;
2407 x = offset % vc->vc_cols;
2408 y = offset / vc->vc_cols;
2409 ret = pos + (vc->vc_cols - x) * 2;
2410 if (ret == softback_end)
2411 ret = softback_buf;
2412 if (ret == softback_in)
2413 ret = vc->vc_origin;
2414 } else {
2415 /* Should not happen */
2416 x = y = 0;
2417 ret = vc->vc_origin;
2418 }
2419 if (px)
2420 *px = x;
2421 if (py)
2422 *py = y;
2423 return ret;
2424 }
2425
2426 /* As we might be inside of softback, we may work with non-contiguous buffer,
2427 that's why we have to use a separate routine. */
2428 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2429 {
2430 while (cnt--) {
2431 u16 a = scr_readw(p);
2432 if (!vc->vc_can_do_color)
2433 a ^= 0x0800;
2434 else if (vc->vc_hi_font_mask == 0x100)
2435 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2436 (((a) & 0x0e00) << 4);
2437 else
2438 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2439 (((a) & 0x0700) << 4);
2440 scr_writew(a, p++);
2441 if (p == (u16 *) softback_end)
2442 p = (u16 *) softback_buf;
2443 if (p == (u16 *) softback_in)
2444 p = (u16 *) vc->vc_origin;
2445 }
2446 }
2447
2448 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2449 {
2450 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2451 struct display *p = &fb_display[fg_console];
2452 int offset, limit, scrollback_old;
2453
2454 if (softback_top) {
2455 if (vc->vc_num != fg_console)
2456 return 0;
2457 if (vc->vc_mode != KD_TEXT || !lines)
2458 return 0;
2459 if (logo_shown >= 0) {
2460 struct vc_data *conp2 = vc_cons[logo_shown].d;
2461
2462 if (conp2->vc_top == logo_lines
2463 && conp2->vc_bottom == conp2->vc_rows)
2464 conp2->vc_top = 0;
2465 if (logo_shown == vc->vc_num) {
2466 unsigned long p, q;
2467 int i;
2468
2469 p = softback_in;
2470 q = vc->vc_origin +
2471 logo_lines * vc->vc_size_row;
2472 for (i = 0; i < logo_lines; i++) {
2473 if (p == softback_top)
2474 break;
2475 if (p == softback_buf)
2476 p = softback_end;
2477 p -= vc->vc_size_row;
2478 q -= vc->vc_size_row;
2479 scr_memcpyw((u16 *) q, (u16 *) p,
2480 vc->vc_size_row);
2481 }
2482 softback_in = p;
2483 update_region(vc, vc->vc_origin,
2484 logo_lines * vc->vc_cols);
2485 }
2486 logo_shown = FBCON_LOGO_CANSHOW;
2487 }
2488 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2489 fbcon_redraw_softback(vc, p, lines);
2490 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2491 return 0;
2492 }
2493
2494 if (!scrollback_phys_max)
2495 return -ENOSYS;
2496
2497 scrollback_old = scrollback_current;
2498 scrollback_current -= lines;
2499 if (scrollback_current < 0)
2500 scrollback_current = 0;
2501 else if (scrollback_current > scrollback_max)
2502 scrollback_current = scrollback_max;
2503 if (scrollback_current == scrollback_old)
2504 return 0;
2505
2506 if (fbcon_is_inactive(vc, info))
2507 return 0;
2508
2509 fbcon_cursor(vc, CM_ERASE);
2510
2511 offset = p->yscroll - scrollback_current;
2512 limit = p->vrows;
2513 switch (p->scrollmode) {
2514 case SCROLL_WRAP_MOVE:
2515 info->var.vmode |= FB_VMODE_YWRAP;
2516 break;
2517 case SCROLL_PAN_MOVE:
2518 case SCROLL_PAN_REDRAW:
2519 limit -= vc->vc_rows;
2520 info->var.vmode &= ~FB_VMODE_YWRAP;
2521 break;
2522 }
2523 if (offset < 0)
2524 offset += limit;
2525 else if (offset >= limit)
2526 offset -= limit;
2527 info->var.xoffset = 0;
2528 info->var.yoffset = offset * vc->vc_font.height;
2529 update_var(vc->vc_num, info);
2530 if (!scrollback_current)
2531 fbcon_cursor(vc, CM_DRAW);
2532 return 0;
2533 }
2534
2535 static int fbcon_set_origin(struct vc_data *vc)
2536 {
2537 if (softback_lines)
2538 fbcon_scrolldelta(vc, softback_lines);
2539 return 0;
2540 }
2541
2542 static void fbcon_suspended(struct fb_info *info)
2543 {
2544 struct vc_data *vc = NULL;
2545 struct fbcon_ops *ops = info->fbcon_par;
2546
2547 if (!ops || ops->currcon < 0)
2548 return;
2549 vc = vc_cons[ops->currcon].d;
2550
2551 /* Clear cursor, restore saved data */
2552 fbcon_cursor(vc, CM_ERASE);
2553 }
2554
2555 static void fbcon_resumed(struct fb_info *info)
2556 {
2557 struct vc_data *vc;
2558 struct fbcon_ops *ops = info->fbcon_par;
2559
2560 if (!ops || ops->currcon < 0)
2561 return;
2562 vc = vc_cons[ops->currcon].d;
2563
2564 update_screen(vc);
2565 }
2566
2567 static void fbcon_modechanged(struct fb_info *info)
2568 {
2569 struct fbcon_ops *ops = info->fbcon_par;
2570 struct vc_data *vc;
2571 struct display *p;
2572 int rows, cols;
2573
2574 if (!ops || ops->currcon < 0)
2575 return;
2576 vc = vc_cons[ops->currcon].d;
2577 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2578 return;
2579
2580 p = &fb_display[vc->vc_num];
2581
2582 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2583
2584 if (CON_IS_VISIBLE(vc)) {
2585 var_to_display(p, &info->var, info);
2586 cols = info->var.xres / vc->vc_font.width;
2587 rows = info->var.yres / vc->vc_font.height;
2588 vc_resize(vc, cols, rows);
2589 updatescrollmode(p, info, vc);
2590 scrollback_max = 0;
2591 scrollback_current = 0;
2592 update_var(vc->vc_num, info);
2593 fbcon_set_palette(vc, color_table);
2594 update_screen(vc);
2595 if (softback_buf)
2596 fbcon_update_softback(vc);
2597 }
2598 }
2599
2600 static void fbcon_set_all_vcs(struct fb_info *info)
2601 {
2602 struct fbcon_ops *ops = info->fbcon_par;
2603 struct vc_data *vc;
2604 struct display *p;
2605 int i, rows, cols;
2606
2607 if (!ops || ops->currcon < 0)
2608 return;
2609
2610 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2611 vc = vc_cons[i].d;
2612 if (!vc || vc->vc_mode != KD_TEXT ||
2613 registered_fb[con2fb_map[i]] != info)
2614 continue;
2615
2616 p = &fb_display[vc->vc_num];
2617
2618 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2619 var_to_display(p, &info->var, info);
2620 cols = info->var.xres / vc->vc_font.width;
2621 rows = info->var.yres / vc->vc_font.height;
2622 vc_resize(vc, cols, rows);
2623
2624 if (CON_IS_VISIBLE(vc)) {
2625 updatescrollmode(p, info, vc);
2626 scrollback_max = 0;
2627 scrollback_current = 0;
2628 update_var(vc->vc_num, info);
2629 fbcon_set_palette(vc, color_table);
2630 update_screen(vc);
2631 if (softback_buf)
2632 fbcon_update_softback(vc);
2633 }
2634 }
2635 }
2636
2637 static int fbcon_mode_deleted(struct fb_info *info,
2638 struct fb_videomode *mode)
2639 {
2640 struct fb_info *fb_info;
2641 struct display *p;
2642 int i, j, found = 0;
2643
2644 /* before deletion, ensure that mode is not in use */
2645 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2646 j = con2fb_map[i];
2647 if (j == -1)
2648 continue;
2649 fb_info = registered_fb[j];
2650 if (fb_info != info)
2651 continue;
2652 p = &fb_display[i];
2653 if (!p || !p->mode)
2654 continue;
2655 if (fb_mode_is_equal(p->mode, mode)) {
2656 found = 1;
2657 break;
2658 }
2659 }
2660 return found;
2661 }
2662
2663 static int fbcon_fb_registered(int idx)
2664 {
2665 int ret = 0, i;
2666
2667 if (info_idx == -1) {
2668 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2669 if (con2fb_map_boot[i] == idx) {
2670 info_idx = idx;
2671 break;
2672 }
2673 }
2674 if (info_idx != -1)
2675 ret = fbcon_takeover(1);
2676 } else {
2677 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2678 if (con2fb_map_boot[i] == idx)
2679 set_con2fb_map(i, idx, 0);
2680 }
2681 }
2682
2683 return ret;
2684 }
2685
2686 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2687 {
2688 struct fbcon_ops *ops = info->fbcon_par;
2689 struct vc_data *vc;
2690
2691 if (!ops || ops->currcon < 0)
2692 return;
2693
2694 vc = vc_cons[ops->currcon].d;
2695 if (vc->vc_mode != KD_TEXT ||
2696 registered_fb[con2fb_map[ops->currcon]] != info)
2697 return;
2698
2699 if (CON_IS_VISIBLE(vc)) {
2700 if (blank)
2701 do_blank_screen(0);
2702 else
2703 do_unblank_screen(0);
2704 }
2705 ops->blank_state = blank;
2706 }
2707
2708 static void fbcon_new_modelist(struct fb_info *info)
2709 {
2710 int i;
2711 struct vc_data *vc;
2712 struct fb_var_screeninfo var;
2713 struct fb_videomode *mode;
2714
2715 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2716 if (registered_fb[con2fb_map[i]] != info)
2717 continue;
2718 if (!fb_display[i].mode)
2719 continue;
2720 vc = vc_cons[i].d;
2721 display_to_var(&var, &fb_display[i]);
2722 mode = fb_find_nearest_mode(&var, &info->modelist);
2723 fb_videomode_to_var(&var, mode);
2724
2725 if (vc)
2726 fbcon_set_disp(info, &var, vc);
2727 else
2728 fbcon_preset_disp(info, &var, i);
2729
2730 }
2731 }
2732
2733 static int fbcon_event_notify(struct notifier_block *self,
2734 unsigned long action, void *data)
2735 {
2736 struct fb_event *event = data;
2737 struct fb_info *info = event->info;
2738 struct fb_videomode *mode;
2739 struct fb_con2fbmap *con2fb;
2740 int ret = 0;
2741
2742 switch(action) {
2743 case FB_EVENT_SUSPEND:
2744 fbcon_suspended(info);
2745 break;
2746 case FB_EVENT_RESUME:
2747 fbcon_resumed(info);
2748 break;
2749 case FB_EVENT_MODE_CHANGE:
2750 fbcon_modechanged(info);
2751 break;
2752 case FB_EVENT_MODE_CHANGE_ALL:
2753 fbcon_set_all_vcs(info);
2754 break;
2755 case FB_EVENT_MODE_DELETE:
2756 mode = event->data;
2757 ret = fbcon_mode_deleted(info, mode);
2758 break;
2759 case FB_EVENT_FB_REGISTERED:
2760 ret = fbcon_fb_registered(info->node);
2761 break;
2762 case FB_EVENT_SET_CONSOLE_MAP:
2763 con2fb = event->data;
2764 ret = set_con2fb_map(con2fb->console - 1,
2765 con2fb->framebuffer, 1);
2766 break;
2767 case FB_EVENT_GET_CONSOLE_MAP:
2768 con2fb = event->data;
2769 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2770 break;
2771 case FB_EVENT_BLANK:
2772 fbcon_fb_blanked(info, *(int *)event->data);
2773 break;
2774 case FB_EVENT_NEW_MODELIST:
2775 fbcon_new_modelist(info);
2776 break;
2777 }
2778
2779 return ret;
2780 }
2781
2782 /*
2783 * The console `switch' structure for the frame buffer based console
2784 */
2785
2786 static const struct consw fb_con = {
2787 .owner = THIS_MODULE,
2788 .con_startup = fbcon_startup,
2789 .con_init = fbcon_init,
2790 .con_deinit = fbcon_deinit,
2791 .con_clear = fbcon_clear,
2792 .con_putc = fbcon_putc,
2793 .con_putcs = fbcon_putcs,
2794 .con_cursor = fbcon_cursor,
2795 .con_scroll = fbcon_scroll,
2796 .con_bmove = fbcon_bmove,
2797 .con_switch = fbcon_switch,
2798 .con_blank = fbcon_blank,
2799 .con_font_set = fbcon_set_font,
2800 .con_font_get = fbcon_get_font,
2801 .con_font_default = fbcon_set_def_font,
2802 .con_font_copy = fbcon_copy_font,
2803 .con_set_palette = fbcon_set_palette,
2804 .con_scrolldelta = fbcon_scrolldelta,
2805 .con_set_origin = fbcon_set_origin,
2806 .con_invert_region = fbcon_invert_region,
2807 .con_screen_pos = fbcon_screen_pos,
2808 .con_getxy = fbcon_getxy,
2809 .con_resize = fbcon_resize,
2810 };
2811
2812 static struct notifier_block fbcon_event_notifier = {
2813 .notifier_call = fbcon_event_notify,
2814 };
2815
2816 static int __init fb_console_init(void)
2817 {
2818 int i;
2819
2820 acquire_console_sem();
2821 fb_register_client(&fbcon_event_notifier);
2822 release_console_sem();
2823
2824 for (i = 0; i < MAX_NR_CONSOLES; i++)
2825 con2fb_map[i] = -1;
2826
2827 if (num_registered_fb) {
2828 for (i = 0; i < FB_MAX; i++) {
2829 if (registered_fb[i] != NULL) {
2830 info_idx = i;
2831 break;
2832 }
2833 }
2834 fbcon_takeover(0);
2835 }
2836
2837 return 0;
2838 }
2839
2840 module_init(fb_console_init);
2841
2842 #ifdef MODULE
2843
2844 static void __exit fb_console_exit(void)
2845 {
2846 acquire_console_sem();
2847 fb_unregister_client(&fbcon_event_notifier);
2848 release_console_sem();
2849 give_up_console(&fb_con);
2850 }
2851
2852 module_exit(fb_console_exit);
2853
2854 #endif
2855
2856 MODULE_LICENSE("GPL");
Linus' kernel tree