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Merge ../torvalds-2.6/
[deliverable/linux.git] / drivers / video / console / fbcon.c
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 fb_flashcursor(void *private)
285 {
286 struct fb_info *info = private;
287 struct fbcon_ops *ops = info->fbcon_par;
288 struct display *p;
289 struct vc_data *vc = NULL;
290 int c;
291 int mode;
292
293 if (ops->currcon != -1)
294 vc = vc_cons[ops->currcon].d;
295
296 if (!vc || !CON_IS_VISIBLE(vc) ||
297 fbcon_is_inactive(vc, info) ||
298 registered_fb[con2fb_map[vc->vc_num]] != info ||
299 vc_cons[ops->currcon].d->vc_deccm != 1)
300 return;
301 acquire_console_sem();
302 p = &fb_display[vc->vc_num];
303 c = scr_readw((u16 *) vc->vc_pos);
304 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
305 CM_ERASE : CM_DRAW;
306 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
307 get_color(vc, info, c, 0));
308 release_console_sem();
309 }
310
311 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
312 static int cursor_blink_rate;
313 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
314 {
315 struct fb_info *info = dev_id;
316
317 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
318 schedule_work(&info->queue);
319 vbl_cursor_cnt = cursor_blink_rate;
320 }
321 return IRQ_HANDLED;
322 }
323 #endif
324
325 static void cursor_timer_handler(unsigned long dev_addr)
326 {
327 struct fb_info *info = (struct fb_info *) dev_addr;
328 struct fbcon_ops *ops = info->fbcon_par;
329
330 schedule_work(&info->queue);
331 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
332 }
333
334 static void fbcon_add_cursor_timer(struct fb_info *info)
335 {
336 struct fbcon_ops *ops = info->fbcon_par;
337
338 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
339 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
340 if (!info->queue.func)
341 INIT_WORK(&info->queue, fb_flashcursor, info);
342
343 init_timer(&ops->cursor_timer);
344 ops->cursor_timer.function = cursor_timer_handler;
345 ops->cursor_timer.expires = jiffies + HZ / 5;
346 ops->cursor_timer.data = (unsigned long ) info;
347 add_timer(&ops->cursor_timer);
348 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
349 }
350 }
351
352 static void fbcon_del_cursor_timer(struct fb_info *info)
353 {
354 struct fbcon_ops *ops = info->fbcon_par;
355
356 if (info->queue.func == fb_flashcursor &&
357 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
358 del_timer_sync(&ops->cursor_timer);
359 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
360 }
361 }
362
363 #ifndef MODULE
364 static int __init fb_console_setup(char *this_opt)
365 {
366 char *options;
367 int i, j;
368
369 if (!this_opt || !*this_opt)
370 return 0;
371
372 while ((options = strsep(&this_opt, ",")) != NULL) {
373 if (!strncmp(options, "font:", 5))
374 strcpy(fontname, options + 5);
375
376 if (!strncmp(options, "scrollback:", 11)) {
377 options += 11;
378 if (*options) {
379 fbcon_softback_size = simple_strtoul(options, &options, 0);
380 if (*options == 'k' || *options == 'K') {
381 fbcon_softback_size *= 1024;
382 options++;
383 }
384 if (*options != ',')
385 return 0;
386 options++;
387 } else
388 return 0;
389 }
390
391 if (!strncmp(options, "map:", 4)) {
392 options += 4;
393 if (*options)
394 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
395 if (!options[j])
396 j = 0;
397 con2fb_map_boot[i] =
398 (options[j++]-'0') % FB_MAX;
399 }
400 return 0;
401 }
402
403 if (!strncmp(options, "vc:", 3)) {
404 options += 3;
405 if (*options)
406 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
407 if (first_fb_vc < 0)
408 first_fb_vc = 0;
409 if (*options++ == '-')
410 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
411 fbcon_is_default = 0;
412 }
413 }
414 return 0;
415 }
416
417 __setup("fbcon=", fb_console_setup);
418 #endif
419
420 static int search_fb_in_map(int idx)
421 {
422 int i, retval = 0;
423
424 for (i = 0; i < MAX_NR_CONSOLES; i++) {
425 if (con2fb_map[i] == idx)
426 retval = 1;
427 }
428 return retval;
429 }
430
431 static int search_for_mapped_con(void)
432 {
433 int i, retval = 0;
434
435 for (i = 0; i < MAX_NR_CONSOLES; i++) {
436 if (con2fb_map[i] != -1)
437 retval = 1;
438 }
439 return retval;
440 }
441
442 static int fbcon_takeover(int show_logo)
443 {
444 int err, i;
445
446 if (!num_registered_fb)
447 return -ENODEV;
448
449 if (!show_logo)
450 logo_shown = FBCON_LOGO_DONTSHOW;
451
452 for (i = first_fb_vc; i <= last_fb_vc; i++)
453 con2fb_map[i] = info_idx;
454
455 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
456 fbcon_is_default);
457 if (err) {
458 for (i = first_fb_vc; i <= last_fb_vc; i++) {
459 con2fb_map[i] = -1;
460 }
461 info_idx = -1;
462 }
463
464 return err;
465 }
466
467 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
468 int cols, int rows, int new_cols, int new_rows)
469 {
470 /* Need to make room for the logo */
471 int cnt, erase = vc->vc_video_erase_char, step;
472 unsigned short *save = NULL, *r, *q;
473
474 /*
475 * remove underline attribute from erase character
476 * if black and white framebuffer.
477 */
478 if (fb_get_color_depth(&info->var, &info->fix) == 1)
479 erase &= ~0x400;
480 logo_height = fb_prepare_logo(info);
481 logo_lines = (logo_height + vc->vc_font.height - 1) /
482 vc->vc_font.height;
483 q = (unsigned short *) (vc->vc_origin +
484 vc->vc_size_row * rows);
485 step = logo_lines * cols;
486 for (r = q - logo_lines * cols; r < q; r++)
487 if (scr_readw(r) != vc->vc_video_erase_char)
488 break;
489 if (r != q && new_rows >= rows + logo_lines) {
490 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
491 if (save) {
492 int i = cols < new_cols ? cols : new_cols;
493 scr_memsetw(save, erase, logo_lines * new_cols * 2);
494 r = q - step;
495 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
496 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
497 r = q;
498 }
499 }
500 if (r == q) {
501 /* We can scroll screen down */
502 r = q - step - cols;
503 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
504 scr_memcpyw(r + step, r, vc->vc_size_row);
505 r -= cols;
506 }
507 if (!save) {
508 vc->vc_y += logo_lines;
509 vc->vc_pos += logo_lines * vc->vc_size_row;
510 }
511 }
512 scr_memsetw((unsigned short *) vc->vc_origin,
513 erase,
514 vc->vc_size_row * logo_lines);
515
516 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
517 fbcon_clear_margins(vc, 0);
518 update_screen(vc);
519 }
520
521 if (save) {
522 q = (unsigned short *) (vc->vc_origin +
523 vc->vc_size_row *
524 rows);
525 scr_memcpyw(q, save, logo_lines * new_cols * 2);
526 vc->vc_y += logo_lines;
527 vc->vc_pos += logo_lines * vc->vc_size_row;
528 kfree(save);
529 }
530
531 if (logo_lines > vc->vc_bottom) {
532 logo_shown = FBCON_LOGO_CANSHOW;
533 printk(KERN_INFO
534 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
535 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
536 logo_shown = FBCON_LOGO_DRAW;
537 vc->vc_top = logo_lines;
538 }
539 }
540
541 #ifdef CONFIG_FB_TILEBLITTING
542 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
543 struct display *p)
544 {
545 struct fbcon_ops *ops = info->fbcon_par;
546
547 if ((info->flags & FBINFO_MISC_TILEBLITTING))
548 fbcon_set_tileops(vc, info, p, ops);
549 else
550 fbcon_set_bitops(ops);
551 }
552 #else
553 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
554 struct display *p)
555 {
556 struct fbcon_ops *ops = info->fbcon_par;
557
558 info->flags &= ~FBINFO_MISC_TILEBLITTING;
559 fbcon_set_bitops(ops);
560 }
561 #endif /* CONFIG_MISC_TILEBLITTING */
562
563
564 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
565 int unit, int oldidx)
566 {
567 struct fbcon_ops *ops = NULL;
568 int err = 0;
569
570 if (!try_module_get(info->fbops->owner))
571 err = -ENODEV;
572
573 if (!err && info->fbops->fb_open &&
574 info->fbops->fb_open(info, 0))
575 err = -ENODEV;
576
577 if (!err) {
578 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
579 if (!ops)
580 err = -ENOMEM;
581 }
582
583 if (!err) {
584 memset(ops, 0, sizeof(struct fbcon_ops));
585 info->fbcon_par = ops;
586 set_blitting_type(vc, info, NULL);
587 }
588
589 if (err) {
590 con2fb_map[unit] = oldidx;
591 module_put(info->fbops->owner);
592 }
593
594 return err;
595 }
596
597 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
598 struct fb_info *newinfo, int unit,
599 int oldidx, int found)
600 {
601 struct fbcon_ops *ops = oldinfo->fbcon_par;
602 int err = 0;
603
604 if (oldinfo->fbops->fb_release &&
605 oldinfo->fbops->fb_release(oldinfo, 0)) {
606 con2fb_map[unit] = oldidx;
607 if (!found && newinfo->fbops->fb_release)
608 newinfo->fbops->fb_release(newinfo, 0);
609 if (!found)
610 module_put(newinfo->fbops->owner);
611 err = -ENODEV;
612 }
613
614 if (!err) {
615 fbcon_del_cursor_timer(oldinfo);
616 kfree(ops->cursor_state.mask);
617 kfree(ops->cursor_data);
618 kfree(oldinfo->fbcon_par);
619 oldinfo->fbcon_par = NULL;
620 module_put(oldinfo->fbops->owner);
621 }
622
623 return err;
624 }
625
626 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
627 int unit, int show_logo)
628 {
629 struct fbcon_ops *ops = info->fbcon_par;
630
631 ops->currcon = fg_console;
632
633 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
634 info->fbops->fb_set_par(info);
635
636 ops->flags |= FBCON_FLAGS_INIT;
637 ops->graphics = 0;
638
639 if (vc)
640 fbcon_set_disp(info, &info->var, vc);
641 else
642 fbcon_preset_disp(info, &info->var, unit);
643
644 if (show_logo) {
645 struct vc_data *fg_vc = vc_cons[fg_console].d;
646 struct fb_info *fg_info =
647 registered_fb[con2fb_map[fg_console]];
648
649 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
650 fg_vc->vc_rows, fg_vc->vc_cols,
651 fg_vc->vc_rows);
652 }
653
654 update_screen(vc_cons[fg_console].d);
655 }
656
657 /**
658 * set_con2fb_map - map console to frame buffer device
659 * @unit: virtual console number to map
660 * @newidx: frame buffer index to map virtual console to
661 * @user: user request
662 *
663 * Maps a virtual console @unit to a frame buffer device
664 * @newidx.
665 */
666 static int set_con2fb_map(int unit, int newidx, int user)
667 {
668 struct vc_data *vc = vc_cons[unit].d;
669 int oldidx = con2fb_map[unit];
670 struct fb_info *info = registered_fb[newidx];
671 struct fb_info *oldinfo = NULL;
672 int found, err = 0;
673
674 if (oldidx == newidx)
675 return 0;
676
677 if (!info)
678 err = -EINVAL;
679
680 if (!err && !search_for_mapped_con()) {
681 info_idx = newidx;
682 return fbcon_takeover(0);
683 }
684
685 if (oldidx != -1)
686 oldinfo = registered_fb[oldidx];
687
688 found = search_fb_in_map(newidx);
689
690 acquire_console_sem();
691 con2fb_map[unit] = newidx;
692 if (!err && !found)
693 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
694
695
696 /*
697 * If old fb is not mapped to any of the consoles,
698 * fbcon should release it.
699 */
700 if (!err && oldinfo && !search_fb_in_map(oldidx))
701 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
702 found);
703
704 if (!err) {
705 int show_logo = (fg_console == 0 && !user &&
706 logo_shown != FBCON_LOGO_DONTSHOW);
707
708 if (!found)
709 fbcon_add_cursor_timer(info);
710 con2fb_map_boot[unit] = newidx;
711 con2fb_init_display(vc, info, unit, show_logo);
712 }
713
714 release_console_sem();
715 return err;
716 }
717
718 /*
719 * Low Level Operations
720 */
721 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
722 static int var_to_display(struct display *disp,
723 struct fb_var_screeninfo *var,
724 struct fb_info *info)
725 {
726 disp->xres_virtual = var->xres_virtual;
727 disp->yres_virtual = var->yres_virtual;
728 disp->bits_per_pixel = var->bits_per_pixel;
729 disp->grayscale = var->grayscale;
730 disp->nonstd = var->nonstd;
731 disp->accel_flags = var->accel_flags;
732 disp->height = var->height;
733 disp->width = var->width;
734 disp->red = var->red;
735 disp->green = var->green;
736 disp->blue = var->blue;
737 disp->transp = var->transp;
738 disp->rotate = var->rotate;
739 disp->mode = fb_match_mode(var, &info->modelist);
740 if (disp->mode == NULL)
741 /* This should not happen */
742 return -EINVAL;
743 return 0;
744 }
745
746 static void display_to_var(struct fb_var_screeninfo *var,
747 struct display *disp)
748 {
749 fb_videomode_to_var(var, disp->mode);
750 var->xres_virtual = disp->xres_virtual;
751 var->yres_virtual = disp->yres_virtual;
752 var->bits_per_pixel = disp->bits_per_pixel;
753 var->grayscale = disp->grayscale;
754 var->nonstd = disp->nonstd;
755 var->accel_flags = disp->accel_flags;
756 var->height = disp->height;
757 var->width = disp->width;
758 var->red = disp->red;
759 var->green = disp->green;
760 var->blue = disp->blue;
761 var->transp = disp->transp;
762 var->rotate = disp->rotate;
763 }
764
765 static const char *fbcon_startup(void)
766 {
767 const char *display_desc = "frame buffer device";
768 struct display *p = &fb_display[fg_console];
769 struct vc_data *vc = vc_cons[fg_console].d;
770 struct font_desc *font = NULL;
771 struct module *owner;
772 struct fb_info *info = NULL;
773 struct fbcon_ops *ops;
774 int rows, cols;
775 int irqres;
776
777 irqres = 1;
778 /*
779 * If num_registered_fb is zero, this is a call for the dummy part.
780 * The frame buffer devices weren't initialized yet.
781 */
782 if (!num_registered_fb || info_idx == -1)
783 return display_desc;
784 /*
785 * Instead of blindly using registered_fb[0], we use info_idx, set by
786 * fb_console_init();
787 */
788 info = registered_fb[info_idx];
789 if (!info)
790 return NULL;
791
792 owner = info->fbops->owner;
793 if (!try_module_get(owner))
794 return NULL;
795 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
796 module_put(owner);
797 return NULL;
798 }
799
800 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
801 if (!ops) {
802 module_put(owner);
803 return NULL;
804 }
805
806 memset(ops, 0, sizeof(struct fbcon_ops));
807 ops->currcon = -1;
808 ops->graphics = 1;
809 info->fbcon_par = ops;
810 set_blitting_type(vc, info, NULL);
811
812 if (info->fix.type != FB_TYPE_TEXT) {
813 if (fbcon_softback_size) {
814 if (!softback_buf) {
815 softback_buf =
816 (unsigned long)
817 kmalloc(fbcon_softback_size,
818 GFP_KERNEL);
819 if (!softback_buf) {
820 fbcon_softback_size = 0;
821 softback_top = 0;
822 }
823 }
824 } else {
825 if (softback_buf) {
826 kfree((void *) softback_buf);
827 softback_buf = 0;
828 softback_top = 0;
829 }
830 }
831 if (softback_buf)
832 softback_in = softback_top = softback_curr =
833 softback_buf;
834 softback_lines = 0;
835 }
836
837 /* Setup default font */
838 if (!p->fontdata) {
839 if (!fontname[0] || !(font = find_font(fontname)))
840 font = get_default_font(info->var.xres,
841 info->var.yres);
842 vc->vc_font.width = font->width;
843 vc->vc_font.height = font->height;
844 vc->vc_font.data = p->fontdata = font->data;
845 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
846 }
847
848 cols = info->var.xres / vc->vc_font.width;
849 rows = info->var.yres / vc->vc_font.height;
850 vc_resize(vc, cols, rows);
851
852 DPRINTK("mode: %s\n", info->fix.id);
853 DPRINTK("visual: %d\n", info->fix.visual);
854 DPRINTK("res: %dx%d-%d\n", info->var.xres,
855 info->var.yres,
856 info->var.bits_per_pixel);
857
858 #ifdef CONFIG_ATARI
859 if (MACH_IS_ATARI) {
860 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
861 irqres =
862 request_irq(IRQ_AUTO_4, fb_vbl_handler,
863 IRQ_TYPE_PRIO, "framebuffer vbl",
864 info);
865 }
866 #endif /* CONFIG_ATARI */
867
868 #ifdef CONFIG_MAC
869 /*
870 * On a Macintoy, the VBL interrupt may or may not be active.
871 * As interrupt based cursor is more reliable and race free, we
872 * probe for VBL interrupts.
873 */
874 if (MACH_IS_MAC) {
875 int ct = 0;
876 /*
877 * Probe for VBL: set temp. handler ...
878 */
879 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
880 "framebuffer vbl", info);
881 vbl_detected = 0;
882
883 /*
884 * ... and spin for 20 ms ...
885 */
886 while (!vbl_detected && ++ct < 1000)
887 udelay(20);
888
889 if (ct == 1000)
890 printk
891 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
892
893 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
894
895 if (vbl_detected) {
896 /*
897 * interrupt based cursor ok
898 */
899 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
900 irqres =
901 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
902 "framebuffer vbl", info);
903 } else {
904 /*
905 * VBL not detected: fall through, use timer based cursor
906 */
907 irqres = 1;
908 }
909 }
910 #endif /* CONFIG_MAC */
911
912 fbcon_add_cursor_timer(info);
913 return display_desc;
914 }
915
916 static void fbcon_init(struct vc_data *vc, int init)
917 {
918 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
919 struct fbcon_ops *ops;
920 struct vc_data **default_mode = vc->vc_display_fg;
921 struct vc_data *svc = *default_mode;
922 struct display *t, *p = &fb_display[vc->vc_num];
923 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
924 int cap;
925
926 if (info_idx == -1 || info == NULL)
927 return;
928
929 cap = info->flags;
930
931 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
932 (info->fix.type == FB_TYPE_TEXT))
933 logo = 0;
934
935 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
936
937 if (var_to_display(p, &info->var, info))
938 return;
939
940 /* If we are not the first console on this
941 fb, copy the font from that console */
942 t = &fb_display[svc->vc_num];
943 if (!vc->vc_font.data) {
944 vc->vc_font.data = p->fontdata = t->fontdata;
945 vc->vc_font.width = (*default_mode)->vc_font.width;
946 vc->vc_font.height = (*default_mode)->vc_font.height;
947 p->userfont = t->userfont;
948 if (p->userfont)
949 REFCOUNT(p->fontdata)++;
950 }
951 if (p->userfont)
952 charcnt = FNTCHARCNT(p->fontdata);
953 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
954 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
955 if (charcnt == 256) {
956 vc->vc_hi_font_mask = 0;
957 } else {
958 vc->vc_hi_font_mask = 0x100;
959 if (vc->vc_can_do_color)
960 vc->vc_complement_mask <<= 1;
961 }
962
963 if (!*svc->vc_uni_pagedir_loc)
964 con_set_default_unimap(svc);
965 if (!*vc->vc_uni_pagedir_loc)
966 con_copy_unimap(vc, svc);
967
968 cols = vc->vc_cols;
969 rows = vc->vc_rows;
970 new_cols = info->var.xres / vc->vc_font.width;
971 new_rows = info->var.yres / vc->vc_font.height;
972 vc_resize(vc, new_cols, new_rows);
973
974 ops = info->fbcon_par;
975 /*
976 * We must always set the mode. The mode of the previous console
977 * driver could be in the same resolution but we are using different
978 * hardware so we have to initialize the hardware.
979 *
980 * We need to do it in fbcon_init() to prevent screen corruption.
981 */
982 if (CON_IS_VISIBLE(vc)) {
983 if (info->fbops->fb_set_par &&
984 !(ops->flags & FBCON_FLAGS_INIT))
985 info->fbops->fb_set_par(info);
986 ops->flags |= FBCON_FLAGS_INIT;
987 }
988
989 ops->graphics = 0;
990
991 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
992 !(cap & FBINFO_HWACCEL_DISABLED))
993 p->scrollmode = SCROLL_MOVE;
994 else /* default to something safe */
995 p->scrollmode = SCROLL_REDRAW;
996
997 /*
998 * ++guenther: console.c:vc_allocate() relies on initializing
999 * vc_{cols,rows}, but we must not set those if we are only
1000 * resizing the console.
1001 */
1002 if (!init) {
1003 vc->vc_cols = new_cols;
1004 vc->vc_rows = new_rows;
1005 }
1006
1007 if (logo)
1008 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1009
1010 if (vc == svc && softback_buf) {
1011 int l = fbcon_softback_size / vc->vc_size_row;
1012 if (l > 5)
1013 softback_end = softback_buf + l * vc->vc_size_row;
1014 else {
1015 /* Smaller scrollback makes no sense, and 0 would screw
1016 the operation totally */
1017 softback_top = 0;
1018 }
1019 }
1020 }
1021
1022 static void fbcon_deinit(struct vc_data *vc)
1023 {
1024 struct display *p = &fb_display[vc->vc_num];
1025
1026 if (info_idx != -1)
1027 return;
1028 fbcon_free_font(p);
1029 }
1030
1031 /* ====================================================================== */
1032
1033 /* fbcon_XXX routines - interface used by the world
1034 *
1035 * This system is now divided into two levels because of complications
1036 * caused by hardware scrolling. Top level functions:
1037 *
1038 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1039 *
1040 * handles y values in range [0, scr_height-1] that correspond to real
1041 * screen positions. y_wrap shift means that first line of bitmap may be
1042 * anywhere on this display. These functions convert lineoffsets to
1043 * bitmap offsets and deal with the wrap-around case by splitting blits.
1044 *
1045 * fbcon_bmove_physical_8() -- These functions fast implementations
1046 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1047 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1048 *
1049 * WARNING:
1050 *
1051 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1052 * Implies should only really hardware scroll in rows. Only reason for
1053 * restriction is simplicity & efficiency at the moment.
1054 */
1055
1056 static __inline__ int real_y(struct display *p, int ypos)
1057 {
1058 int rows = p->vrows;
1059
1060 ypos += p->yscroll;
1061 return ypos < rows ? ypos : ypos - rows;
1062 }
1063
1064
1065 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1066 int width)
1067 {
1068 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1069 struct fbcon_ops *ops = info->fbcon_par;
1070
1071 struct display *p = &fb_display[vc->vc_num];
1072 u_int y_break;
1073
1074 if (fbcon_is_inactive(vc, info))
1075 return;
1076
1077 if (!height || !width)
1078 return;
1079
1080 /* Split blits that cross physical y_wrap boundary */
1081
1082 y_break = p->vrows - p->yscroll;
1083 if (sy < y_break && sy + height - 1 >= y_break) {
1084 u_int b = y_break - sy;
1085 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1086 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1087 width);
1088 } else
1089 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1090 }
1091
1092 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1093 int count, int ypos, int xpos)
1094 {
1095 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1096 struct display *p = &fb_display[vc->vc_num];
1097 struct fbcon_ops *ops = info->fbcon_par;
1098
1099 if (!fbcon_is_inactive(vc, info))
1100 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1101 get_color(vc, info, scr_readw(s), 1),
1102 get_color(vc, info, scr_readw(s), 0));
1103 }
1104
1105 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1106 {
1107 unsigned short chr;
1108
1109 scr_writew(c, &chr);
1110 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1111 }
1112
1113 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1114 {
1115 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1116 struct fbcon_ops *ops = info->fbcon_par;
1117
1118 if (!fbcon_is_inactive(vc, info))
1119 ops->clear_margins(vc, info, bottom_only);
1120 }
1121
1122 static void fbcon_cursor(struct vc_data *vc, int mode)
1123 {
1124 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1125 struct fbcon_ops *ops = info->fbcon_par;
1126 struct display *p = &fb_display[vc->vc_num];
1127 int y;
1128 int c = scr_readw((u16 *) vc->vc_pos);
1129
1130 if (fbcon_is_inactive(vc, info))
1131 return;
1132
1133 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1134 if (mode & CM_SOFTBACK) {
1135 mode &= ~CM_SOFTBACK;
1136 y = softback_lines;
1137 } else {
1138 if (softback_lines)
1139 fbcon_set_origin(vc);
1140 y = 0;
1141 }
1142
1143 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1144 get_color(vc, info, c, 0));
1145 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1146 }
1147
1148 static int scrollback_phys_max = 0;
1149 static int scrollback_max = 0;
1150 static int scrollback_current = 0;
1151
1152 static int update_var(int con, struct fb_info *info)
1153 {
1154 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1155 return fb_pan_display(info, &info->var);
1156 return 0;
1157 }
1158
1159 /*
1160 * If no vc is existent yet, just set struct display
1161 */
1162 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1163 int unit)
1164 {
1165 struct display *p = &fb_display[unit];
1166 struct display *t = &fb_display[fg_console];
1167
1168 var->xoffset = var->yoffset = p->yscroll = 0;
1169 if (var_to_display(p, var, info))
1170 return;
1171
1172 p->fontdata = t->fontdata;
1173 p->userfont = t->userfont;
1174 if (p->userfont)
1175 REFCOUNT(p->fontdata)++;
1176 }
1177
1178 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1179 struct vc_data *vc)
1180 {
1181 struct display *p = &fb_display[vc->vc_num], *t;
1182 struct vc_data **default_mode = vc->vc_display_fg;
1183 struct vc_data *svc = *default_mode;
1184 int rows, cols, charcnt = 256;
1185
1186 var->xoffset = var->yoffset = p->yscroll = 0;
1187 if (var_to_display(p, var, info))
1188 return;
1189 t = &fb_display[svc->vc_num];
1190 if (!vc->vc_font.data) {
1191 vc->vc_font.data = p->fontdata = t->fontdata;
1192 vc->vc_font.width = (*default_mode)->vc_font.width;
1193 vc->vc_font.height = (*default_mode)->vc_font.height;
1194 p->userfont = t->userfont;
1195 if (p->userfont)
1196 REFCOUNT(p->fontdata)++;
1197 }
1198 if (p->userfont)
1199 charcnt = FNTCHARCNT(p->fontdata);
1200
1201 var->activate = FB_ACTIVATE_NOW;
1202 info->var.activate = var->activate;
1203 info->var.yoffset = info->var.xoffset = 0;
1204 fb_set_var(info, var);
1205
1206 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1207 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1208 if (charcnt == 256) {
1209 vc->vc_hi_font_mask = 0;
1210 } else {
1211 vc->vc_hi_font_mask = 0x100;
1212 if (vc->vc_can_do_color)
1213 vc->vc_complement_mask <<= 1;
1214 }
1215
1216 if (!*svc->vc_uni_pagedir_loc)
1217 con_set_default_unimap(svc);
1218 if (!*vc->vc_uni_pagedir_loc)
1219 con_copy_unimap(vc, svc);
1220
1221 cols = var->xres / vc->vc_font.width;
1222 rows = var->yres / vc->vc_font.height;
1223 vc_resize(vc, cols, rows);
1224 if (CON_IS_VISIBLE(vc)) {
1225 update_screen(vc);
1226 if (softback_buf) {
1227 int l = fbcon_softback_size / vc->vc_size_row;
1228
1229 if (l > 5)
1230 softback_end = softback_buf + l *
1231 vc->vc_size_row;
1232 else {
1233 /* Smaller scrollback makes no sense, and 0
1234 would screw the operation totally */
1235 softback_top = 0;
1236 }
1237 }
1238 }
1239 }
1240
1241 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1242 {
1243 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1244 struct display *p = &fb_display[vc->vc_num];
1245
1246 p->yscroll += count;
1247 if (p->yscroll >= p->vrows) /* Deal with wrap */
1248 p->yscroll -= p->vrows;
1249 info->var.xoffset = 0;
1250 info->var.yoffset = p->yscroll * vc->vc_font.height;
1251 info->var.vmode |= FB_VMODE_YWRAP;
1252 update_var(vc->vc_num, info);
1253 scrollback_max += count;
1254 if (scrollback_max > scrollback_phys_max)
1255 scrollback_max = scrollback_phys_max;
1256 scrollback_current = 0;
1257 }
1258
1259 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1260 {
1261 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1262 struct display *p = &fb_display[vc->vc_num];
1263
1264 p->yscroll -= count;
1265 if (p->yscroll < 0) /* Deal with wrap */
1266 p->yscroll += p->vrows;
1267 info->var.xoffset = 0;
1268 info->var.yoffset = p->yscroll * vc->vc_font.height;
1269 info->var.vmode |= FB_VMODE_YWRAP;
1270 update_var(vc->vc_num, info);
1271 scrollback_max -= count;
1272 if (scrollback_max < 0)
1273 scrollback_max = 0;
1274 scrollback_current = 0;
1275 }
1276
1277 static __inline__ void ypan_up(struct vc_data *vc, int count)
1278 {
1279 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1280 struct display *p = &fb_display[vc->vc_num];
1281 struct fbcon_ops *ops = info->fbcon_par;
1282
1283 p->yscroll += count;
1284 if (p->yscroll > p->vrows - vc->vc_rows) {
1285 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1286 0, 0, 0, vc->vc_rows, vc->vc_cols);
1287 p->yscroll -= p->vrows - vc->vc_rows;
1288 }
1289 info->var.xoffset = 0;
1290 info->var.yoffset = p->yscroll * vc->vc_font.height;
1291 info->var.vmode &= ~FB_VMODE_YWRAP;
1292 update_var(vc->vc_num, info);
1293 fbcon_clear_margins(vc, 1);
1294 scrollback_max += count;
1295 if (scrollback_max > scrollback_phys_max)
1296 scrollback_max = scrollback_phys_max;
1297 scrollback_current = 0;
1298 }
1299
1300 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1301 {
1302 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1303 struct display *p = &fb_display[vc->vc_num];
1304 int redraw = 0;
1305
1306 p->yscroll += count;
1307 if (p->yscroll > p->vrows - vc->vc_rows) {
1308 p->yscroll -= p->vrows - vc->vc_rows;
1309 redraw = 1;
1310 }
1311
1312 info->var.xoffset = 0;
1313 info->var.yoffset = p->yscroll * vc->vc_font.height;
1314 info->var.vmode &= ~FB_VMODE_YWRAP;
1315 if (redraw)
1316 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1317 update_var(vc->vc_num, info);
1318 fbcon_clear_margins(vc, 1);
1319 scrollback_max += count;
1320 if (scrollback_max > scrollback_phys_max)
1321 scrollback_max = scrollback_phys_max;
1322 scrollback_current = 0;
1323 }
1324
1325 static __inline__ void ypan_down(struct vc_data *vc, int count)
1326 {
1327 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1328 struct display *p = &fb_display[vc->vc_num];
1329 struct fbcon_ops *ops = info->fbcon_par;
1330
1331 p->yscroll -= count;
1332 if (p->yscroll < 0) {
1333 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1334 0, vc->vc_rows, vc->vc_cols);
1335 p->yscroll += p->vrows - vc->vc_rows;
1336 }
1337 info->var.xoffset = 0;
1338 info->var.yoffset = p->yscroll * vc->vc_font.height;
1339 info->var.vmode &= ~FB_VMODE_YWRAP;
1340 update_var(vc->vc_num, info);
1341 fbcon_clear_margins(vc, 1);
1342 scrollback_max -= count;
1343 if (scrollback_max < 0)
1344 scrollback_max = 0;
1345 scrollback_current = 0;
1346 }
1347
1348 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1349 {
1350 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1351 struct display *p = &fb_display[vc->vc_num];
1352 int redraw = 0;
1353
1354 p->yscroll -= count;
1355 if (p->yscroll < 0) {
1356 p->yscroll += p->vrows - vc->vc_rows;
1357 redraw = 1;
1358 }
1359 info->var.xoffset = 0;
1360 info->var.yoffset = p->yscroll * vc->vc_font.height;
1361 info->var.vmode &= ~FB_VMODE_YWRAP;
1362 if (redraw)
1363 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1364 update_var(vc->vc_num, info);
1365 fbcon_clear_margins(vc, 1);
1366 scrollback_max -= count;
1367 if (scrollback_max < 0)
1368 scrollback_max = 0;
1369 scrollback_current = 0;
1370 }
1371
1372 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1373 long delta)
1374 {
1375 int count = vc->vc_rows;
1376 unsigned short *d, *s;
1377 unsigned long n;
1378 int line = 0;
1379
1380 d = (u16 *) softback_curr;
1381 if (d == (u16 *) softback_in)
1382 d = (u16 *) vc->vc_origin;
1383 n = softback_curr + delta * vc->vc_size_row;
1384 softback_lines -= delta;
1385 if (delta < 0) {
1386 if (softback_curr < softback_top && n < softback_buf) {
1387 n += softback_end - softback_buf;
1388 if (n < softback_top) {
1389 softback_lines -=
1390 (softback_top - n) / vc->vc_size_row;
1391 n = softback_top;
1392 }
1393 } else if (softback_curr >= softback_top
1394 && n < softback_top) {
1395 softback_lines -=
1396 (softback_top - n) / vc->vc_size_row;
1397 n = softback_top;
1398 }
1399 } else {
1400 if (softback_curr > softback_in && n >= softback_end) {
1401 n += softback_buf - softback_end;
1402 if (n > softback_in) {
1403 n = softback_in;
1404 softback_lines = 0;
1405 }
1406 } else if (softback_curr <= softback_in && n > softback_in) {
1407 n = softback_in;
1408 softback_lines = 0;
1409 }
1410 }
1411 if (n == softback_curr)
1412 return;
1413 softback_curr = n;
1414 s = (u16 *) softback_curr;
1415 if (s == (u16 *) softback_in)
1416 s = (u16 *) vc->vc_origin;
1417 while (count--) {
1418 unsigned short *start;
1419 unsigned short *le;
1420 unsigned short c;
1421 int x = 0;
1422 unsigned short attr = 1;
1423
1424 start = s;
1425 le = advance_row(s, 1);
1426 do {
1427 c = scr_readw(s);
1428 if (attr != (c & 0xff00)) {
1429 attr = c & 0xff00;
1430 if (s > start) {
1431 fbcon_putcs(vc, start, s - start,
1432 line, x);
1433 x += s - start;
1434 start = s;
1435 }
1436 }
1437 if (c == scr_readw(d)) {
1438 if (s > start) {
1439 fbcon_putcs(vc, start, s - start,
1440 line, x);
1441 x += s - start + 1;
1442 start = s + 1;
1443 } else {
1444 x++;
1445 start++;
1446 }
1447 }
1448 s++;
1449 d++;
1450 } while (s < le);
1451 if (s > start)
1452 fbcon_putcs(vc, start, s - start, line, x);
1453 line++;
1454 if (d == (u16 *) softback_end)
1455 d = (u16 *) softback_buf;
1456 if (d == (u16 *) softback_in)
1457 d = (u16 *) vc->vc_origin;
1458 if (s == (u16 *) softback_end)
1459 s = (u16 *) softback_buf;
1460 if (s == (u16 *) softback_in)
1461 s = (u16 *) vc->vc_origin;
1462 }
1463 }
1464
1465 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1466 int line, int count, int dy)
1467 {
1468 unsigned short *s = (unsigned short *)
1469 (vc->vc_origin + vc->vc_size_row * line);
1470
1471 while (count--) {
1472 unsigned short *start = s;
1473 unsigned short *le = advance_row(s, 1);
1474 unsigned short c;
1475 int x = 0;
1476 unsigned short attr = 1;
1477
1478 do {
1479 c = scr_readw(s);
1480 if (attr != (c & 0xff00)) {
1481 attr = c & 0xff00;
1482 if (s > start) {
1483 fbcon_putcs(vc, start, s - start,
1484 dy, x);
1485 x += s - start;
1486 start = s;
1487 }
1488 }
1489 console_conditional_schedule();
1490 s++;
1491 } while (s < le);
1492 if (s > start)
1493 fbcon_putcs(vc, start, s - start, dy, x);
1494 console_conditional_schedule();
1495 dy++;
1496 }
1497 }
1498
1499 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1500 int line, int count, int offset)
1501 {
1502 unsigned short *d = (unsigned short *)
1503 (vc->vc_origin + vc->vc_size_row * line);
1504 unsigned short *s = d + offset;
1505
1506 while (count--) {
1507 unsigned short *start = s;
1508 unsigned short *le = advance_row(s, 1);
1509 unsigned short c;
1510 int x = 0;
1511 unsigned short attr = 1;
1512
1513 do {
1514 c = scr_readw(s);
1515 if (attr != (c & 0xff00)) {
1516 attr = c & 0xff00;
1517 if (s > start) {
1518 fbcon_putcs(vc, start, s - start,
1519 line, x);
1520 x += s - start;
1521 start = s;
1522 }
1523 }
1524 if (c == scr_readw(d)) {
1525 if (s > start) {
1526 fbcon_putcs(vc, start, s - start,
1527 line, x);
1528 x += s - start + 1;
1529 start = s + 1;
1530 } else {
1531 x++;
1532 start++;
1533 }
1534 }
1535 scr_writew(c, d);
1536 console_conditional_schedule();
1537 s++;
1538 d++;
1539 } while (s < le);
1540 if (s > start)
1541 fbcon_putcs(vc, start, s - start, line, x);
1542 console_conditional_schedule();
1543 if (offset > 0)
1544 line++;
1545 else {
1546 line--;
1547 /* NOTE: We subtract two lines from these pointers */
1548 s -= vc->vc_size_row;
1549 d -= vc->vc_size_row;
1550 }
1551 }
1552 }
1553
1554 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1555 int count)
1556 {
1557 unsigned short *p;
1558
1559 if (vc->vc_num != fg_console)
1560 return;
1561 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1562
1563 while (count) {
1564 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1565 count--;
1566 p = advance_row(p, 1);
1567 softback_in += vc->vc_size_row;
1568 if (softback_in == softback_end)
1569 softback_in = softback_buf;
1570 if (softback_in == softback_top) {
1571 softback_top += vc->vc_size_row;
1572 if (softback_top == softback_end)
1573 softback_top = softback_buf;
1574 }
1575 }
1576 softback_curr = softback_in;
1577 }
1578
1579 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1580 int count)
1581 {
1582 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1583 struct display *p = &fb_display[vc->vc_num];
1584 struct fbcon_ops *ops = info->fbcon_par;
1585 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1586
1587 if (fbcon_is_inactive(vc, info))
1588 return -EINVAL;
1589
1590 fbcon_cursor(vc, CM_ERASE);
1591
1592 /*
1593 * ++Geert: Only use ywrap/ypan if the console is in text mode
1594 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1595 * whole screen (prevents flicker).
1596 */
1597
1598 switch (dir) {
1599 case SM_UP:
1600 if (count > vc->vc_rows) /* Maximum realistic size */
1601 count = vc->vc_rows;
1602 if (softback_top)
1603 fbcon_softback_note(vc, t, count);
1604 if (logo_shown >= 0)
1605 goto redraw_up;
1606 switch (p->scrollmode) {
1607 case SCROLL_MOVE:
1608 ops->bmove(vc, info, t + count, 0, t, 0,
1609 b - t - count, vc->vc_cols);
1610 ops->clear(vc, info, b - count, 0, count,
1611 vc->vc_cols);
1612 break;
1613
1614 case SCROLL_WRAP_MOVE:
1615 if (b - t - count > 3 * vc->vc_rows >> 2) {
1616 if (t > 0)
1617 fbcon_bmove(vc, 0, 0, count, 0, t,
1618 vc->vc_cols);
1619 ywrap_up(vc, count);
1620 if (vc->vc_rows - b > 0)
1621 fbcon_bmove(vc, b - count, 0, b, 0,
1622 vc->vc_rows - b,
1623 vc->vc_cols);
1624 } else if (info->flags & FBINFO_READS_FAST)
1625 fbcon_bmove(vc, t + count, 0, t, 0,
1626 b - t - count, vc->vc_cols);
1627 else
1628 goto redraw_up;
1629 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1630 break;
1631
1632 case SCROLL_PAN_REDRAW:
1633 if ((p->yscroll + count <=
1634 2 * (p->vrows - vc->vc_rows))
1635 && ((!scroll_partial && (b - t == vc->vc_rows))
1636 || (scroll_partial
1637 && (b - t - count >
1638 3 * vc->vc_rows >> 2)))) {
1639 if (t > 0)
1640 fbcon_redraw_move(vc, p, 0, t, count);
1641 ypan_up_redraw(vc, t, count);
1642 if (vc->vc_rows - b > 0)
1643 fbcon_redraw_move(vc, p, b - count,
1644 vc->vc_rows - b, b);
1645 } else
1646 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1647 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1648 break;
1649
1650 case SCROLL_PAN_MOVE:
1651 if ((p->yscroll + count <=
1652 2 * (p->vrows - vc->vc_rows))
1653 && ((!scroll_partial && (b - t == vc->vc_rows))
1654 || (scroll_partial
1655 && (b - t - count >
1656 3 * vc->vc_rows >> 2)))) {
1657 if (t > 0)
1658 fbcon_bmove(vc, 0, 0, count, 0, t,
1659 vc->vc_cols);
1660 ypan_up(vc, count);
1661 if (vc->vc_rows - b > 0)
1662 fbcon_bmove(vc, b - count, 0, b, 0,
1663 vc->vc_rows - b,
1664 vc->vc_cols);
1665 } else if (info->flags & FBINFO_READS_FAST)
1666 fbcon_bmove(vc, t + count, 0, t, 0,
1667 b - t - count, vc->vc_cols);
1668 else
1669 goto redraw_up;
1670 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1671 break;
1672
1673 case SCROLL_REDRAW:
1674 redraw_up:
1675 fbcon_redraw(vc, p, t, b - t - count,
1676 count * vc->vc_cols);
1677 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1678 scr_memsetw((unsigned short *) (vc->vc_origin +
1679 vc->vc_size_row *
1680 (b - count)),
1681 vc->vc_video_erase_char,
1682 vc->vc_size_row * count);
1683 return 1;
1684 }
1685 break;
1686
1687 case SM_DOWN:
1688 if (count > vc->vc_rows) /* Maximum realistic size */
1689 count = vc->vc_rows;
1690 switch (p->scrollmode) {
1691 case SCROLL_MOVE:
1692 ops->bmove(vc, info, t, 0, t + count, 0,
1693 b - t - count, vc->vc_cols);
1694 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1695 break;
1696
1697 case SCROLL_WRAP_MOVE:
1698 if (b - t - count > 3 * vc->vc_rows >> 2) {
1699 if (vc->vc_rows - b > 0)
1700 fbcon_bmove(vc, b, 0, b - count, 0,
1701 vc->vc_rows - b,
1702 vc->vc_cols);
1703 ywrap_down(vc, count);
1704 if (t > 0)
1705 fbcon_bmove(vc, count, 0, 0, 0, t,
1706 vc->vc_cols);
1707 } else if (info->flags & FBINFO_READS_FAST)
1708 fbcon_bmove(vc, t, 0, t + count, 0,
1709 b - t - count, vc->vc_cols);
1710 else
1711 goto redraw_down;
1712 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1713 break;
1714
1715 case SCROLL_PAN_MOVE:
1716 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1717 && ((!scroll_partial && (b - t == vc->vc_rows))
1718 || (scroll_partial
1719 && (b - t - count >
1720 3 * vc->vc_rows >> 2)))) {
1721 if (vc->vc_rows - b > 0)
1722 fbcon_bmove(vc, b, 0, b - count, 0,
1723 vc->vc_rows - b,
1724 vc->vc_cols);
1725 ypan_down(vc, count);
1726 if (t > 0)
1727 fbcon_bmove(vc, count, 0, 0, 0, t,
1728 vc->vc_cols);
1729 } else if (info->flags & FBINFO_READS_FAST)
1730 fbcon_bmove(vc, t, 0, t + count, 0,
1731 b - t - count, vc->vc_cols);
1732 else
1733 goto redraw_down;
1734 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1735 break;
1736
1737 case SCROLL_PAN_REDRAW:
1738 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1739 && ((!scroll_partial && (b - t == vc->vc_rows))
1740 || (scroll_partial
1741 && (b - t - count >
1742 3 * vc->vc_rows >> 2)))) {
1743 if (vc->vc_rows - b > 0)
1744 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1745 b - count);
1746 ypan_down_redraw(vc, t, count);
1747 if (t > 0)
1748 fbcon_redraw_move(vc, p, count, t, 0);
1749 } else
1750 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1751 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1752 break;
1753
1754 case SCROLL_REDRAW:
1755 redraw_down:
1756 fbcon_redraw(vc, p, b - 1, b - t - count,
1757 -count * vc->vc_cols);
1758 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1759 scr_memsetw((unsigned short *) (vc->vc_origin +
1760 vc->vc_size_row *
1761 t),
1762 vc->vc_video_erase_char,
1763 vc->vc_size_row * count);
1764 return 1;
1765 }
1766 }
1767 return 0;
1768 }
1769
1770
1771 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1772 int height, int width)
1773 {
1774 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1775 struct display *p = &fb_display[vc->vc_num];
1776
1777 if (fbcon_is_inactive(vc, info))
1778 return;
1779
1780 if (!width || !height)
1781 return;
1782
1783 /* Split blits that cross physical y_wrap case.
1784 * Pathological case involves 4 blits, better to use recursive
1785 * code rather than unrolled case
1786 *
1787 * Recursive invocations don't need to erase the cursor over and
1788 * over again, so we use fbcon_bmove_rec()
1789 */
1790 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1791 p->vrows - p->yscroll);
1792 }
1793
1794 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1795 int dy, int dx, int height, int width, u_int y_break)
1796 {
1797 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1798 struct fbcon_ops *ops = info->fbcon_par;
1799 u_int b;
1800
1801 if (sy < y_break && sy + height > y_break) {
1802 b = y_break - sy;
1803 if (dy < sy) { /* Avoid trashing self */
1804 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1805 y_break);
1806 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1807 height - b, width, y_break);
1808 } else {
1809 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1810 height - b, width, y_break);
1811 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1812 y_break);
1813 }
1814 return;
1815 }
1816
1817 if (dy < y_break && dy + height > y_break) {
1818 b = y_break - dy;
1819 if (dy < sy) { /* Avoid trashing self */
1820 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1821 y_break);
1822 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1823 height - b, width, y_break);
1824 } else {
1825 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1826 height - b, width, y_break);
1827 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1828 y_break);
1829 }
1830 return;
1831 }
1832 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1833 height, width);
1834 }
1835
1836 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1837 struct vc_data *vc)
1838 {
1839 int fh = vc->vc_font.height;
1840 int cap = info->flags;
1841 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1842 && divides(info->fix.ypanstep, vc->vc_font.height)
1843 && info->var.yres_virtual > info->var.yres;
1844 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1845 && divides(info->fix.ywrapstep, vc->vc_font.height)
1846 && divides(vc->vc_font.height, info->var.yres_virtual);
1847 int reading_fast = cap & FBINFO_READS_FAST;
1848 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1849 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1850
1851 p->vrows = info->var.yres_virtual/fh;
1852 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1853 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1854 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1855 info->var.yres % fh))
1856 p->vrows--;
1857
1858 if (good_wrap || good_pan) {
1859 if (reading_fast || fast_copyarea)
1860 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1861 else
1862 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1863 SCROLL_PAN_REDRAW;
1864 } else {
1865 if (reading_fast || (fast_copyarea && !fast_imageblit))
1866 p->scrollmode = SCROLL_MOVE;
1867 else
1868 p->scrollmode = SCROLL_REDRAW;
1869 }
1870 }
1871
1872 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1873 unsigned int height)
1874 {
1875 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1876 struct display *p = &fb_display[vc->vc_num];
1877 struct fb_var_screeninfo var = info->var;
1878 int x_diff, y_diff;
1879 int fw = vc->vc_font.width;
1880 int fh = vc->vc_font.height;
1881
1882 var.xres = width * fw;
1883 var.yres = height * fh;
1884 x_diff = info->var.xres - var.xres;
1885 y_diff = info->var.yres - var.yres;
1886 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1887 struct fb_videomode *mode;
1888
1889 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1890 mode = fb_find_best_mode(&var, &info->modelist);
1891 if (mode == NULL)
1892 return -EINVAL;
1893 fb_videomode_to_var(&var, mode);
1894 if (width > var.xres/fw || height > var.yres/fh)
1895 return -EINVAL;
1896 /*
1897 * The following can probably have any value... Do we need to
1898 * set all of them?
1899 */
1900 var.bits_per_pixel = p->bits_per_pixel;
1901 var.xres_virtual = p->xres_virtual;
1902 var.yres_virtual = p->yres_virtual;
1903 var.accel_flags = p->accel_flags;
1904 var.width = p->width;
1905 var.height = p->height;
1906 var.red = p->red;
1907 var.green = p->green;
1908 var.blue = p->blue;
1909 var.transp = p->transp;
1910 var.nonstd = p->nonstd;
1911
1912 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1913 if (CON_IS_VISIBLE(vc)) {
1914 var.activate = FB_ACTIVATE_NOW |
1915 FB_ACTIVATE_FORCE;
1916 fb_set_var(info, &var);
1917 }
1918 var_to_display(p, &info->var, info);
1919 }
1920 updatescrollmode(p, info, vc);
1921 return 0;
1922 }
1923
1924 static int fbcon_switch(struct vc_data *vc)
1925 {
1926 struct fb_info *info, *old_info = NULL;
1927 struct display *p = &fb_display[vc->vc_num];
1928 struct fb_var_screeninfo var;
1929 int i, prev_console;
1930
1931 info = registered_fb[con2fb_map[vc->vc_num]];
1932
1933 if (softback_top) {
1934 int l = fbcon_softback_size / vc->vc_size_row;
1935 if (softback_lines)
1936 fbcon_set_origin(vc);
1937 softback_top = softback_curr = softback_in = softback_buf;
1938 softback_lines = 0;
1939
1940 if (l > 5)
1941 softback_end = softback_buf + l * vc->vc_size_row;
1942 else {
1943 /* Smaller scrollback makes no sense, and 0 would screw
1944 the operation totally */
1945 softback_top = 0;
1946 }
1947 }
1948
1949 if (logo_shown >= 0) {
1950 struct vc_data *conp2 = vc_cons[logo_shown].d;
1951
1952 if (conp2->vc_top == logo_lines
1953 && conp2->vc_bottom == conp2->vc_rows)
1954 conp2->vc_top = 0;
1955 logo_shown = FBCON_LOGO_CANSHOW;
1956 }
1957
1958 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
1959 if (prev_console != -1)
1960 old_info = registered_fb[con2fb_map[prev_console]];
1961 /*
1962 * FIXME: If we have multiple fbdev's loaded, we need to
1963 * update all info->currcon. Perhaps, we can place this
1964 * in a centralized structure, but this might break some
1965 * drivers.
1966 *
1967 * info->currcon = vc->vc_num;
1968 */
1969 for (i = 0; i < FB_MAX; i++) {
1970 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1971 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1972
1973 ops->currcon = vc->vc_num;
1974 }
1975 }
1976 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1977 display_to_var(&var, p);
1978 var.activate = FB_ACTIVATE_NOW;
1979
1980 /*
1981 * make sure we don't unnecessarily trip the memcmp()
1982 * in fb_set_var()
1983 */
1984 info->var.activate = var.activate;
1985 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1986 fb_set_var(info, &var);
1987
1988 if (old_info != NULL && old_info != info) {
1989 if (info->fbops->fb_set_par)
1990 info->fbops->fb_set_par(info);
1991 fbcon_del_cursor_timer(old_info);
1992 fbcon_add_cursor_timer(info);
1993 }
1994
1995 set_blitting_type(vc, info, p);
1996 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1997
1998 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1999 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2000 updatescrollmode(p, info, vc);
2001
2002 switch (p->scrollmode) {
2003 case SCROLL_WRAP_MOVE:
2004 scrollback_phys_max = p->vrows - vc->vc_rows;
2005 break;
2006 case SCROLL_PAN_MOVE:
2007 case SCROLL_PAN_REDRAW:
2008 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2009 if (scrollback_phys_max < 0)
2010 scrollback_phys_max = 0;
2011 break;
2012 default:
2013 scrollback_phys_max = 0;
2014 break;
2015 }
2016 scrollback_max = 0;
2017 scrollback_current = 0;
2018
2019 update_var(vc->vc_num, info);
2020 fbcon_set_palette(vc, color_table);
2021 fbcon_clear_margins(vc, 0);
2022
2023 if (logo_shown == FBCON_LOGO_DRAW) {
2024
2025 logo_shown = fg_console;
2026 /* This is protected above by initmem_freed */
2027 fb_show_logo(info);
2028 update_region(vc,
2029 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2030 vc->vc_size_row * (vc->vc_bottom -
2031 vc->vc_top) / 2);
2032 return 0;
2033 }
2034 return 1;
2035 }
2036
2037 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2038 int blank)
2039 {
2040 if (blank) {
2041 unsigned short charmask = vc->vc_hi_font_mask ?
2042 0x1ff : 0xff;
2043 unsigned short oldc;
2044
2045 oldc = vc->vc_video_erase_char;
2046 vc->vc_video_erase_char &= charmask;
2047 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2048 vc->vc_video_erase_char = oldc;
2049 }
2050 }
2051
2052 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2053 {
2054 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2055 struct fbcon_ops *ops = info->fbcon_par;
2056
2057 if (mode_switch) {
2058 struct fb_var_screeninfo var = info->var;
2059
2060 ops->graphics = 1;
2061
2062 if (!blank) {
2063 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2064 fb_set_var(info, &var);
2065 ops->graphics = 0;
2066 }
2067 }
2068
2069 if (!fbcon_is_inactive(vc, info)) {
2070 if (ops->blank_state != blank) {
2071 ops->blank_state = blank;
2072 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2073 ops->cursor_flash = (!blank);
2074
2075 if (fb_blank(info, blank))
2076 fbcon_generic_blank(vc, info, blank);
2077 }
2078
2079 if (!blank)
2080 update_screen(vc);
2081 }
2082
2083 if (!blank)
2084 fbcon_add_cursor_timer(info);
2085 else
2086 fbcon_del_cursor_timer(info);
2087
2088 return 0;
2089 }
2090
2091 static void fbcon_free_font(struct display *p)
2092 {
2093 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2094 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2095 p->fontdata = NULL;
2096 p->userfont = 0;
2097 }
2098
2099 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2100 {
2101 u8 *fontdata = vc->vc_font.data;
2102 u8 *data = font->data;
2103 int i, j;
2104
2105 font->width = vc->vc_font.width;
2106 font->height = vc->vc_font.height;
2107 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2108 if (!font->data)
2109 return 0;
2110
2111 if (font->width <= 8) {
2112 j = vc->vc_font.height;
2113 for (i = 0; i < font->charcount; i++) {
2114 memcpy(data, fontdata, j);
2115 memset(data + j, 0, 32 - j);
2116 data += 32;
2117 fontdata += j;
2118 }
2119 } else if (font->width <= 16) {
2120 j = vc->vc_font.height * 2;
2121 for (i = 0; i < font->charcount; i++) {
2122 memcpy(data, fontdata, j);
2123 memset(data + j, 0, 64 - j);
2124 data += 64;
2125 fontdata += j;
2126 }
2127 } else if (font->width <= 24) {
2128 for (i = 0; i < font->charcount; i++) {
2129 for (j = 0; j < vc->vc_font.height; j++) {
2130 *data++ = fontdata[0];
2131 *data++ = fontdata[1];
2132 *data++ = fontdata[2];
2133 fontdata += sizeof(u32);
2134 }
2135 memset(data, 0, 3 * (32 - j));
2136 data += 3 * (32 - j);
2137 }
2138 } else {
2139 j = vc->vc_font.height * 4;
2140 for (i = 0; i < font->charcount; i++) {
2141 memcpy(data, fontdata, j);
2142 memset(data + j, 0, 128 - j);
2143 data += 128;
2144 fontdata += j;
2145 }
2146 }
2147 return 0;
2148 }
2149
2150 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2151 u8 * data, int userfont)
2152 {
2153 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2154 struct display *p = &fb_display[vc->vc_num];
2155 int resize;
2156 int cnt;
2157 char *old_data = NULL;
2158
2159 if (CON_IS_VISIBLE(vc) && softback_lines)
2160 fbcon_set_origin(vc);
2161
2162 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2163 if (p->userfont)
2164 old_data = vc->vc_font.data;
2165 if (userfont)
2166 cnt = FNTCHARCNT(data);
2167 else
2168 cnt = 256;
2169 vc->vc_font.data = p->fontdata = data;
2170 if ((p->userfont = userfont))
2171 REFCOUNT(data)++;
2172 vc->vc_font.width = w;
2173 vc->vc_font.height = h;
2174 if (vc->vc_hi_font_mask && cnt == 256) {
2175 vc->vc_hi_font_mask = 0;
2176 if (vc->vc_can_do_color) {
2177 vc->vc_complement_mask >>= 1;
2178 vc->vc_s_complement_mask >>= 1;
2179 }
2180
2181 /* ++Edmund: reorder the attribute bits */
2182 if (vc->vc_can_do_color) {
2183 unsigned short *cp =
2184 (unsigned short *) vc->vc_origin;
2185 int count = vc->vc_screenbuf_size / 2;
2186 unsigned short c;
2187 for (; count > 0; count--, cp++) {
2188 c = scr_readw(cp);
2189 scr_writew(((c & 0xfe00) >> 1) |
2190 (c & 0xff), cp);
2191 }
2192 c = vc->vc_video_erase_char;
2193 vc->vc_video_erase_char =
2194 ((c & 0xfe00) >> 1) | (c & 0xff);
2195 vc->vc_attr >>= 1;
2196 }
2197 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2198 vc->vc_hi_font_mask = 0x100;
2199 if (vc->vc_can_do_color) {
2200 vc->vc_complement_mask <<= 1;
2201 vc->vc_s_complement_mask <<= 1;
2202 }
2203
2204 /* ++Edmund: reorder the attribute bits */
2205 {
2206 unsigned short *cp =
2207 (unsigned short *) vc->vc_origin;
2208 int count = vc->vc_screenbuf_size / 2;
2209 unsigned short c;
2210 for (; count > 0; count--, cp++) {
2211 unsigned short newc;
2212 c = scr_readw(cp);
2213 if (vc->vc_can_do_color)
2214 newc =
2215 ((c & 0xff00) << 1) | (c &
2216 0xff);
2217 else
2218 newc = c & ~0x100;
2219 scr_writew(newc, cp);
2220 }
2221 c = vc->vc_video_erase_char;
2222 if (vc->vc_can_do_color) {
2223 vc->vc_video_erase_char =
2224 ((c & 0xff00) << 1) | (c & 0xff);
2225 vc->vc_attr <<= 1;
2226 } else
2227 vc->vc_video_erase_char = c & ~0x100;
2228 }
2229
2230 }
2231
2232 if (resize) {
2233 /* reset wrap/pan */
2234 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2235 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2236 if (CON_IS_VISIBLE(vc) && softback_buf) {
2237 int l = fbcon_softback_size / vc->vc_size_row;
2238 if (l > 5)
2239 softback_end =
2240 softback_buf + l * vc->vc_size_row;
2241 else {
2242 /* Smaller scrollback makes no sense, and 0 would screw
2243 the operation totally */
2244 softback_top = 0;
2245 }
2246 }
2247 } else if (CON_IS_VISIBLE(vc)
2248 && vc->vc_mode == KD_TEXT) {
2249 fbcon_clear_margins(vc, 0);
2250 update_screen(vc);
2251 }
2252
2253 if (old_data && (--REFCOUNT(old_data) == 0))
2254 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2255 return 0;
2256 }
2257
2258 static int fbcon_copy_font(struct vc_data *vc, int con)
2259 {
2260 struct display *od = &fb_display[con];
2261 struct console_font *f = &vc->vc_font;
2262
2263 if (od->fontdata == f->data)
2264 return 0; /* already the same font... */
2265 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2266 }
2267
2268 /*
2269 * User asked to set font; we are guaranteed that
2270 * a) width and height are in range 1..32
2271 * b) charcount does not exceed 512
2272 * but lets not assume that, since someone might someday want to use larger
2273 * fonts. And charcount of 512 is small for unicode support.
2274 *
2275 * However, user space gives the font in 32 rows , regardless of
2276 * actual font height. So a new API is needed if support for larger fonts
2277 * is ever implemented.
2278 */
2279
2280 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2281 {
2282 unsigned charcount = font->charcount;
2283 int w = font->width;
2284 int h = font->height;
2285 int size;
2286 int i, csum;
2287 u8 *new_data, *data = font->data;
2288 int pitch = (font->width+7) >> 3;
2289
2290 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2291 * If not this check should be changed to charcount < 256 */
2292 if (charcount != 256 && charcount != 512)
2293 return -EINVAL;
2294
2295 size = h * pitch * charcount;
2296
2297 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2298
2299 if (!new_data)
2300 return -ENOMEM;
2301
2302 new_data += FONT_EXTRA_WORDS * sizeof(int);
2303 FNTSIZE(new_data) = size;
2304 FNTCHARCNT(new_data) = charcount;
2305 REFCOUNT(new_data) = 0; /* usage counter */
2306 for (i=0; i< charcount; i++) {
2307 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2308 }
2309
2310 /* Since linux has a nice crc32 function use it for counting font
2311 * checksums. */
2312 csum = crc32(0, new_data, size);
2313
2314 FNTSUM(new_data) = csum;
2315 /* Check if the same font is on some other console already */
2316 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2317 struct vc_data *tmp = vc_cons[i].d;
2318
2319 if (fb_display[i].userfont &&
2320 fb_display[i].fontdata &&
2321 FNTSUM(fb_display[i].fontdata) == csum &&
2322 FNTSIZE(fb_display[i].fontdata) == size &&
2323 tmp->vc_font.width == w &&
2324 !memcmp(fb_display[i].fontdata, new_data, size)) {
2325 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2326 new_data = fb_display[i].fontdata;
2327 break;
2328 }
2329 }
2330 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2331 }
2332
2333 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2334 {
2335 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2336 struct font_desc *f;
2337
2338 if (!name)
2339 f = get_default_font(info->var.xres, info->var.yres);
2340 else if (!(f = find_font(name)))
2341 return -ENOENT;
2342
2343 font->width = f->width;
2344 font->height = f->height;
2345 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2346 }
2347
2348 static u16 palette_red[16];
2349 static u16 palette_green[16];
2350 static u16 palette_blue[16];
2351
2352 static struct fb_cmap palette_cmap = {
2353 0, 16, palette_red, palette_green, palette_blue, NULL
2354 };
2355
2356 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2357 {
2358 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2359 int i, j, k, depth;
2360 u8 val;
2361
2362 if (fbcon_is_inactive(vc, info))
2363 return -EINVAL;
2364
2365 if (!CON_IS_VISIBLE(vc))
2366 return 0;
2367
2368 depth = fb_get_color_depth(&info->var, &info->fix);
2369 if (depth > 3) {
2370 for (i = j = 0; i < 16; i++) {
2371 k = table[i];
2372 val = vc->vc_palette[j++];
2373 palette_red[k] = (val << 8) | val;
2374 val = vc->vc_palette[j++];
2375 palette_green[k] = (val << 8) | val;
2376 val = vc->vc_palette[j++];
2377 palette_blue[k] = (val << 8) | val;
2378 }
2379 palette_cmap.len = 16;
2380 palette_cmap.start = 0;
2381 /*
2382 * If framebuffer is capable of less than 16 colors,
2383 * use default palette of fbcon.
2384 */
2385 } else
2386 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2387
2388 return fb_set_cmap(&palette_cmap, info);
2389 }
2390
2391 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2392 {
2393 unsigned long p;
2394 int line;
2395
2396 if (vc->vc_num != fg_console || !softback_lines)
2397 return (u16 *) (vc->vc_origin + offset);
2398 line = offset / vc->vc_size_row;
2399 if (line >= softback_lines)
2400 return (u16 *) (vc->vc_origin + offset -
2401 softback_lines * vc->vc_size_row);
2402 p = softback_curr + offset;
2403 if (p >= softback_end)
2404 p += softback_buf - softback_end;
2405 return (u16 *) p;
2406 }
2407
2408 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2409 int *px, int *py)
2410 {
2411 unsigned long ret;
2412 int x, y;
2413
2414 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2415 unsigned long offset = (pos - vc->vc_origin) / 2;
2416
2417 x = offset % vc->vc_cols;
2418 y = offset / vc->vc_cols;
2419 if (vc->vc_num == fg_console)
2420 y += softback_lines;
2421 ret = pos + (vc->vc_cols - x) * 2;
2422 } else if (vc->vc_num == fg_console && softback_lines) {
2423 unsigned long offset = pos - softback_curr;
2424
2425 if (pos < softback_curr)
2426 offset += softback_end - softback_buf;
2427 offset /= 2;
2428 x = offset % vc->vc_cols;
2429 y = offset / vc->vc_cols;
2430 ret = pos + (vc->vc_cols - x) * 2;
2431 if (ret == softback_end)
2432 ret = softback_buf;
2433 if (ret == softback_in)
2434 ret = vc->vc_origin;
2435 } else {
2436 /* Should not happen */
2437 x = y = 0;
2438 ret = vc->vc_origin;
2439 }
2440 if (px)
2441 *px = x;
2442 if (py)
2443 *py = y;
2444 return ret;
2445 }
2446
2447 /* As we might be inside of softback, we may work with non-contiguous buffer,
2448 that's why we have to use a separate routine. */
2449 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2450 {
2451 while (cnt--) {
2452 u16 a = scr_readw(p);
2453 if (!vc->vc_can_do_color)
2454 a ^= 0x0800;
2455 else if (vc->vc_hi_font_mask == 0x100)
2456 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2457 (((a) & 0x0e00) << 4);
2458 else
2459 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2460 (((a) & 0x0700) << 4);
2461 scr_writew(a, p++);
2462 if (p == (u16 *) softback_end)
2463 p = (u16 *) softback_buf;
2464 if (p == (u16 *) softback_in)
2465 p = (u16 *) vc->vc_origin;
2466 }
2467 }
2468
2469 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2470 {
2471 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2472 struct display *p = &fb_display[fg_console];
2473 int offset, limit, scrollback_old;
2474
2475 if (softback_top) {
2476 if (vc->vc_num != fg_console)
2477 return 0;
2478 if (vc->vc_mode != KD_TEXT || !lines)
2479 return 0;
2480 if (logo_shown >= 0) {
2481 struct vc_data *conp2 = vc_cons[logo_shown].d;
2482
2483 if (conp2->vc_top == logo_lines
2484 && conp2->vc_bottom == conp2->vc_rows)
2485 conp2->vc_top = 0;
2486 if (logo_shown == vc->vc_num) {
2487 unsigned long p, q;
2488 int i;
2489
2490 p = softback_in;
2491 q = vc->vc_origin +
2492 logo_lines * vc->vc_size_row;
2493 for (i = 0; i < logo_lines; i++) {
2494 if (p == softback_top)
2495 break;
2496 if (p == softback_buf)
2497 p = softback_end;
2498 p -= vc->vc_size_row;
2499 q -= vc->vc_size_row;
2500 scr_memcpyw((u16 *) q, (u16 *) p,
2501 vc->vc_size_row);
2502 }
2503 softback_in = p;
2504 update_region(vc, vc->vc_origin,
2505 logo_lines * vc->vc_cols);
2506 }
2507 logo_shown = FBCON_LOGO_CANSHOW;
2508 }
2509 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2510 fbcon_redraw_softback(vc, p, lines);
2511 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2512 return 0;
2513 }
2514
2515 if (!scrollback_phys_max)
2516 return -ENOSYS;
2517
2518 scrollback_old = scrollback_current;
2519 scrollback_current -= lines;
2520 if (scrollback_current < 0)
2521 scrollback_current = 0;
2522 else if (scrollback_current > scrollback_max)
2523 scrollback_current = scrollback_max;
2524 if (scrollback_current == scrollback_old)
2525 return 0;
2526
2527 if (fbcon_is_inactive(vc, info))
2528 return 0;
2529
2530 fbcon_cursor(vc, CM_ERASE);
2531
2532 offset = p->yscroll - scrollback_current;
2533 limit = p->vrows;
2534 switch (p->scrollmode) {
2535 case SCROLL_WRAP_MOVE:
2536 info->var.vmode |= FB_VMODE_YWRAP;
2537 break;
2538 case SCROLL_PAN_MOVE:
2539 case SCROLL_PAN_REDRAW:
2540 limit -= vc->vc_rows;
2541 info->var.vmode &= ~FB_VMODE_YWRAP;
2542 break;
2543 }
2544 if (offset < 0)
2545 offset += limit;
2546 else if (offset >= limit)
2547 offset -= limit;
2548 info->var.xoffset = 0;
2549 info->var.yoffset = offset * vc->vc_font.height;
2550 update_var(vc->vc_num, info);
2551 if (!scrollback_current)
2552 fbcon_cursor(vc, CM_DRAW);
2553 return 0;
2554 }
2555
2556 static int fbcon_set_origin(struct vc_data *vc)
2557 {
2558 if (softback_lines)
2559 fbcon_scrolldelta(vc, softback_lines);
2560 return 0;
2561 }
2562
2563 static void fbcon_suspended(struct fb_info *info)
2564 {
2565 struct vc_data *vc = NULL;
2566 struct fbcon_ops *ops = info->fbcon_par;
2567
2568 if (!ops || ops->currcon < 0)
2569 return;
2570 vc = vc_cons[ops->currcon].d;
2571
2572 /* Clear cursor, restore saved data */
2573 fbcon_cursor(vc, CM_ERASE);
2574 }
2575
2576 static void fbcon_resumed(struct fb_info *info)
2577 {
2578 struct vc_data *vc;
2579 struct fbcon_ops *ops = info->fbcon_par;
2580
2581 if (!ops || ops->currcon < 0)
2582 return;
2583 vc = vc_cons[ops->currcon].d;
2584
2585 update_screen(vc);
2586 }
2587
2588 static void fbcon_modechanged(struct fb_info *info)
2589 {
2590 struct fbcon_ops *ops = info->fbcon_par;
2591 struct vc_data *vc;
2592 struct display *p;
2593 int rows, cols;
2594
2595 if (!ops || ops->currcon < 0)
2596 return;
2597 vc = vc_cons[ops->currcon].d;
2598 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2599 return;
2600
2601 p = &fb_display[vc->vc_num];
2602
2603 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2604
2605 if (CON_IS_VISIBLE(vc)) {
2606 var_to_display(p, &info->var, info);
2607 cols = info->var.xres / vc->vc_font.width;
2608 rows = info->var.yres / vc->vc_font.height;
2609 vc_resize(vc, cols, rows);
2610 updatescrollmode(p, info, vc);
2611 scrollback_max = 0;
2612 scrollback_current = 0;
2613 update_var(vc->vc_num, info);
2614 fbcon_set_palette(vc, color_table);
2615 update_screen(vc);
2616 if (softback_buf) {
2617 int l = fbcon_softback_size / vc->vc_size_row;
2618 if (l > 5)
2619 softback_end = softback_buf + l * vc->vc_size_row;
2620 else {
2621 /* Smaller scrollback makes no sense, and 0
2622 would screw the operation totally */
2623 softback_top = 0;
2624 }
2625 }
2626 }
2627 }
2628
2629 static void fbcon_set_all_vcs(struct fb_info *info)
2630 {
2631 struct fbcon_ops *ops = info->fbcon_par;
2632 struct vc_data *vc;
2633 struct display *p;
2634 int i, rows, cols;
2635
2636 if (!ops || ops->currcon < 0)
2637 return;
2638
2639 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2640 vc = vc_cons[i].d;
2641 if (!vc || vc->vc_mode != KD_TEXT ||
2642 registered_fb[con2fb_map[i]] != info)
2643 continue;
2644
2645 p = &fb_display[vc->vc_num];
2646
2647 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2648 var_to_display(p, &info->var, info);
2649 cols = info->var.xres / vc->vc_font.width;
2650 rows = info->var.yres / vc->vc_font.height;
2651 vc_resize(vc, cols, rows);
2652
2653 if (CON_IS_VISIBLE(vc)) {
2654 updatescrollmode(p, info, vc);
2655 scrollback_max = 0;
2656 scrollback_current = 0;
2657 update_var(vc->vc_num, info);
2658 fbcon_set_palette(vc, color_table);
2659 update_screen(vc);
2660 if (softback_buf) {
2661 int l = fbcon_softback_size / vc->vc_size_row;
2662 if (l > 5)
2663 softback_end = softback_buf + l * vc->vc_size_row;
2664 else {
2665 /* Smaller scrollback makes no sense, and 0
2666 would screw the operation totally */
2667 softback_top = 0;
2668 }
2669 }
2670 }
2671 }
2672 }
2673
2674 static int fbcon_mode_deleted(struct fb_info *info,
2675 struct fb_videomode *mode)
2676 {
2677 struct fb_info *fb_info;
2678 struct display *p;
2679 int i, j, found = 0;
2680
2681 /* before deletion, ensure that mode is not in use */
2682 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2683 j = con2fb_map[i];
2684 if (j == -1)
2685 continue;
2686 fb_info = registered_fb[j];
2687 if (fb_info != info)
2688 continue;
2689 p = &fb_display[i];
2690 if (!p || !p->mode)
2691 continue;
2692 if (fb_mode_is_equal(p->mode, mode)) {
2693 found = 1;
2694 break;
2695 }
2696 }
2697 return found;
2698 }
2699
2700 static int fbcon_fb_registered(int idx)
2701 {
2702 int ret = 0, i;
2703
2704 if (info_idx == -1) {
2705 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2706 if (con2fb_map_boot[i] == idx) {
2707 info_idx = idx;
2708 break;
2709 }
2710 }
2711 if (info_idx != -1)
2712 ret = fbcon_takeover(1);
2713 } else {
2714 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2715 if (con2fb_map_boot[i] == idx)
2716 set_con2fb_map(i, idx, 0);
2717 }
2718 }
2719
2720 return ret;
2721 }
2722
2723 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2724 {
2725 struct fbcon_ops *ops = info->fbcon_par;
2726 struct vc_data *vc;
2727
2728 if (!ops || ops->currcon < 0)
2729 return;
2730
2731 vc = vc_cons[ops->currcon].d;
2732 if (vc->vc_mode != KD_TEXT ||
2733 registered_fb[con2fb_map[ops->currcon]] != info)
2734 return;
2735
2736 if (CON_IS_VISIBLE(vc)) {
2737 if (blank)
2738 do_blank_screen(0);
2739 else
2740 do_unblank_screen(0);
2741 }
2742 ops->blank_state = blank;
2743 }
2744
2745 static void fbcon_new_modelist(struct fb_info *info)
2746 {
2747 int i;
2748 struct vc_data *vc;
2749 struct fb_var_screeninfo var;
2750 struct fb_videomode *mode;
2751
2752 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2753 if (registered_fb[con2fb_map[i]] != info)
2754 continue;
2755 if (!fb_display[i].mode)
2756 continue;
2757 vc = vc_cons[i].d;
2758 display_to_var(&var, &fb_display[i]);
2759 mode = fb_find_nearest_mode(&var, &info->modelist);
2760 fb_videomode_to_var(&var, mode);
2761
2762 if (vc)
2763 fbcon_set_disp(info, &var, vc);
2764 else
2765 fbcon_preset_disp(info, &var, i);
2766
2767 }
2768 }
2769
2770 static int fbcon_event_notify(struct notifier_block *self,
2771 unsigned long action, void *data)
2772 {
2773 struct fb_event *event = data;
2774 struct fb_info *info = event->info;
2775 struct fb_videomode *mode;
2776 struct fb_con2fbmap *con2fb;
2777 int ret = 0;
2778
2779 switch(action) {
2780 case FB_EVENT_SUSPEND:
2781 fbcon_suspended(info);
2782 break;
2783 case FB_EVENT_RESUME:
2784 fbcon_resumed(info);
2785 break;
2786 case FB_EVENT_MODE_CHANGE:
2787 fbcon_modechanged(info);
2788 break;
2789 case FB_EVENT_MODE_CHANGE_ALL:
2790 fbcon_set_all_vcs(info);
2791 break;
2792 case FB_EVENT_MODE_DELETE:
2793 mode = event->data;
2794 ret = fbcon_mode_deleted(info, mode);
2795 break;
2796 case FB_EVENT_FB_REGISTERED:
2797 ret = fbcon_fb_registered(info->node);
2798 break;
2799 case FB_EVENT_SET_CONSOLE_MAP:
2800 con2fb = event->data;
2801 ret = set_con2fb_map(con2fb->console - 1,
2802 con2fb->framebuffer, 1);
2803 break;
2804 case FB_EVENT_GET_CONSOLE_MAP:
2805 con2fb = event->data;
2806 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2807 break;
2808 case FB_EVENT_BLANK:
2809 fbcon_fb_blanked(info, *(int *)event->data);
2810 break;
2811 case FB_EVENT_NEW_MODELIST:
2812 fbcon_new_modelist(info);
2813 break;
2814 }
2815
2816 return ret;
2817 }
2818
2819 /*
2820 * The console `switch' structure for the frame buffer based console
2821 */
2822
2823 static const struct consw fb_con = {
2824 .owner = THIS_MODULE,
2825 .con_startup = fbcon_startup,
2826 .con_init = fbcon_init,
2827 .con_deinit = fbcon_deinit,
2828 .con_clear = fbcon_clear,
2829 .con_putc = fbcon_putc,
2830 .con_putcs = fbcon_putcs,
2831 .con_cursor = fbcon_cursor,
2832 .con_scroll = fbcon_scroll,
2833 .con_bmove = fbcon_bmove,
2834 .con_switch = fbcon_switch,
2835 .con_blank = fbcon_blank,
2836 .con_font_set = fbcon_set_font,
2837 .con_font_get = fbcon_get_font,
2838 .con_font_default = fbcon_set_def_font,
2839 .con_font_copy = fbcon_copy_font,
2840 .con_set_palette = fbcon_set_palette,
2841 .con_scrolldelta = fbcon_scrolldelta,
2842 .con_set_origin = fbcon_set_origin,
2843 .con_invert_region = fbcon_invert_region,
2844 .con_screen_pos = fbcon_screen_pos,
2845 .con_getxy = fbcon_getxy,
2846 .con_resize = fbcon_resize,
2847 };
2848
2849 static struct notifier_block fbcon_event_notifier = {
2850 .notifier_call = fbcon_event_notify,
2851 };
2852
2853 static int __init fb_console_init(void)
2854 {
2855 int i;
2856
2857 acquire_console_sem();
2858 fb_register_client(&fbcon_event_notifier);
2859 release_console_sem();
2860
2861 for (i = 0; i < MAX_NR_CONSOLES; i++)
2862 con2fb_map[i] = -1;
2863
2864 if (num_registered_fb) {
2865 for (i = 0; i < FB_MAX; i++) {
2866 if (registered_fb[i] != NULL) {
2867 info_idx = i;
2868 break;
2869 }
2870 }
2871 fbcon_takeover(0);
2872 }
2873
2874 return 0;
2875 }
2876
2877 module_init(fb_console_init);
2878
2879 #ifdef MODULE
2880
2881 static void __exit fb_console_exit(void)
2882 {
2883 acquire_console_sem();
2884 fb_unregister_client(&fbcon_event_notifier);
2885 release_console_sem();
2886 give_up_console(&fb_con);
2887 }
2888
2889 module_exit(fb_console_exit);
2890
2891 #endif
2892
2893 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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