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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / console / fbcon.c
blob59e3b4b4e7e3e29b8efc7ee2a38e12b6d2eb0ccf
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/config.h>
62 #include <linux/module.h>
63 #include <linux/types.h>
64 #include <linux/sched.h>
65 #include <linux/fs.h>
66 #include <linux/kernel.h>
67 #include <linux/delay.h> /* MSch: for IRQ probe */
68 #include <linux/tty.h>
69 #include <linux/console.h>
70 #include <linux/string.h>
71 #include <linux/kd.h>
72 #include <linux/slab.h>
73 #include <linux/fb.h>
74 #include <linux/vt_kern.h>
75 #include <linux/selection.h>
76 #include <linux/font.h>
77 #include <linux/smp.h>
78 #include <linux/init.h>
79 #include <linux/interrupt.h>
80 #include <linux/crc32.h> /* For counting font checksums */
81 #include <asm/irq.h>
82 #include <asm/system.h>
83 #include <asm/uaccess.h>
84 #ifdef CONFIG_ATARI
85 #include <asm/atariints.h>
86 #endif
87 #ifdef CONFIG_MAC
88 #include <asm/macints.h>
89 #endif
90 #if defined(__mc68000__) || defined(CONFIG_APUS)
91 #include <asm/machdep.h>
92 #include <asm/setup.h>
93 #endif
94
95 #include "fbcon.h"
96
97 #ifdef FBCONDEBUG
98 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
99 #else
100 # define DPRINTK(fmt, args...)
101 #endif
102
103 enum {
104 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
105 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
106 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
107 };
108
109 struct display fb_display[MAX_NR_CONSOLES];
110 static signed char con2fb_map[MAX_NR_CONSOLES];
111 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
112 static int logo_height;
113 static int logo_lines;
114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116 static int logo_shown = FBCON_LOGO_CANSHOW;
117 /* Software scrollback */
118 static int fbcon_softback_size = 32768;
119 static unsigned long softback_buf, softback_curr;
120 static unsigned long softback_in;
121 static unsigned long softback_top, softback_end;
122 static int softback_lines;
123 /* console mappings */
124 static int first_fb_vc;
125 static int last_fb_vc = MAX_NR_CONSOLES - 1;
126 static int fbcon_is_default = 1;
127 /* font data */
128 static char fontname[40];
129
130 /* current fb_info */
131 static int info_idx = -1;
132
133 static const struct consw fb_con;
134
135 #define CM_SOFTBACK (8)
136
137 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
138
139 static void fbcon_free_font(struct display *);
140 static int fbcon_set_origin(struct vc_data *);
141
142 #define CURSOR_DRAW_DELAY (1)
143
144 /* # VBL ints between cursor state changes */
145 #define ARM_CURSOR_BLINK_RATE (10)
146 #define ATARI_CURSOR_BLINK_RATE (42)
147 #define MAC_CURSOR_BLINK_RATE (32)
148 #define DEFAULT_CURSOR_BLINK_RATE (20)
149
150 static int vbl_cursor_cnt;
151
152 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
153
154 /*
155 * Interface used by the world
156 */
157
158 static const char *fbcon_startup(void);
159 static void fbcon_init(struct vc_data *vc, int init);
160 static void fbcon_deinit(struct vc_data *vc);
161 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
162 int width);
163 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
164 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
165 int count, int ypos, int xpos);
166 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
167 static void fbcon_cursor(struct vc_data *vc, int mode);
168 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
169 int count);
170 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
171 int height, int width);
172 static int fbcon_switch(struct vc_data *vc);
173 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
174 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
175 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
176
177 /*
178 * Internal routines
179 */
180 static __inline__ int real_y(struct display *p, int ypos);
181 static __inline__ void ywrap_up(struct vc_data *vc, int count);
182 static __inline__ void ywrap_down(struct vc_data *vc, int count);
183 static __inline__ void ypan_up(struct vc_data *vc, int count);
184 static __inline__ void ypan_down(struct vc_data *vc, int count);
185 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
186 int dy, int dx, int height, int width, u_int y_break);
187 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
188 struct vc_data *vc);
189 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 int unit);
191 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
192 int line, int count, int dy);
193
194 #ifdef CONFIG_MAC
195 /*
196 * On the Macintoy, there may or may not be a working VBL int. We need to probe
197 */
198 static int vbl_detected;
199
200 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
201 {
202 vbl_detected++;
203 return IRQ_HANDLED;
204 }
205 #endif
206
207 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
208 {
209 struct fbcon_ops *ops = info->fbcon_par;
210
211 return (info->state != FBINFO_STATE_RUNNING ||
212 vc->vc_mode != KD_TEXT || ops->graphics);
213 }
214
215 static inline int get_color(struct vc_data *vc, struct fb_info *info,
216 u16 c, int is_fg)
217 {
218 int depth = fb_get_color_depth(&info->var);
219 int color = 0;
220
221 if (console_blanked) {
222 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
223
224 c = vc->vc_video_erase_char & charmask;
225 }
226
227 if (depth != 1)
228 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
229 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
230
231 switch (depth) {
232 case 1:
233 {
234 /* 0 or 1 */
235 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? 1 : 0;
236 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : 1;
237
238 if (console_blanked)
239 fg = bg;
240
241 color = (is_fg) ? fg : bg;
242 break;
243 }
244 case 2:
245 /*
246 * Scale down 16-colors to 4 colors. Default 4-color palette
247 * is grayscale.
248 */
249 color /= 4;
250 break;
251 case 3:
252 /*
253 * Last 8 entries of default 16-color palette is a more intense
254 * version of the first 8 (i.e., same chrominance, different
255 * luminance).
256 */
257 color &= 7;
258 break;
259 }
260
261
262 return color;
263 }
264
265 static void fb_flashcursor(void *private)
266 {
267 struct fb_info *info = private;
268 struct fbcon_ops *ops = info->fbcon_par;
269 struct display *p;
270 struct vc_data *vc = NULL;
271 int c;
272 int mode;
273
274 if (ops->currcon != -1)
275 vc = vc_cons[ops->currcon].d;
276
277 if (!vc || !CON_IS_VISIBLE(vc) ||
278 fbcon_is_inactive(vc, info) ||
279 registered_fb[con2fb_map[vc->vc_num]] != info)
280 return;
281 acquire_console_sem();
282 p = &fb_display[vc->vc_num];
283 c = scr_readw((u16 *) vc->vc_pos);
284 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
285 CM_ERASE : CM_DRAW;
286 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
287 get_color(vc, info, c, 0));
288 release_console_sem();
289 }
290
291 #if (defined(__arm__) && defined(IRQ_VSYNCPULSE)) || defined(CONFIG_ATARI) || defined(CONFIG_MAC)
292 static int cursor_blink_rate;
293 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
294 {
295 struct fb_info *info = dev_id;
296
297 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
298 schedule_work(&info->queue);
299 vbl_cursor_cnt = cursor_blink_rate;
300 }
301 return IRQ_HANDLED;
302 }
303 #endif
304
305 static void cursor_timer_handler(unsigned long dev_addr)
306 {
307 struct fb_info *info = (struct fb_info *) dev_addr;
308 struct fbcon_ops *ops = info->fbcon_par;
309
310 schedule_work(&info->queue);
311 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
312 }
313
314 #ifndef MODULE
315 static int __init fb_console_setup(char *this_opt)
316 {
317 char *options;
318 int i, j;
319
320 if (!this_opt || !*this_opt)
321 return 0;
322
323 while ((options = strsep(&this_opt, ",")) != NULL) {
324 if (!strncmp(options, "font:", 5))
325 strcpy(fontname, options + 5);
326
327 if (!strncmp(options, "scrollback:", 11)) {
328 options += 11;
329 if (*options) {
330 fbcon_softback_size = simple_strtoul(options, &options, 0);
331 if (*options == 'k' || *options == 'K') {
332 fbcon_softback_size *= 1024;
333 options++;
334 }
335 if (*options != ',')
336 return 0;
337 options++;
338 } else
339 return 0;
340 }
341
342 if (!strncmp(options, "map:", 4)) {
343 options += 4;
344 if (*options)
345 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
346 if (!options[j])
347 j = 0;
348 con2fb_map_boot[i] =
349 (options[j++]-'0') % FB_MAX;
350 }
351 return 0;
352 }
353
354 if (!strncmp(options, "vc:", 3)) {
355 options += 3;
356 if (*options)
357 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
358 if (first_fb_vc < 0)
359 first_fb_vc = 0;
360 if (*options++ == '-')
361 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
362 fbcon_is_default = 0;
363 }
364 }
365 return 0;
366 }
367
368 __setup("fbcon=", fb_console_setup);
369 #endif
370
371 static int search_fb_in_map(int idx)
372 {
373 int i, retval = 0;
374
375 for (i = 0; i < MAX_NR_CONSOLES; i++) {
376 if (con2fb_map[i] == idx)
377 retval = 1;
378 }
379 return retval;
380 }
381
382 static int search_for_mapped_con(void)
383 {
384 int i, retval = 0;
385
386 for (i = 0; i < MAX_NR_CONSOLES; i++) {
387 if (con2fb_map[i] != -1)
388 retval = 1;
389 }
390 return retval;
391 }
392
393 static int fbcon_takeover(int show_logo)
394 {
395 int err, i;
396
397 if (!num_registered_fb)
398 return -ENODEV;
399
400 if (!show_logo)
401 logo_shown = FBCON_LOGO_DONTSHOW;
402
403 for (i = first_fb_vc; i <= last_fb_vc; i++)
404 con2fb_map[i] = info_idx;
405
406 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
407 fbcon_is_default);
408 if (err) {
409 for (i = first_fb_vc; i <= last_fb_vc; i++) {
410 con2fb_map[i] = -1;
411 }
412 info_idx = -1;
413 }
414
415 return err;
416 }
417
418 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
419 int cols, int rows, int new_cols, int new_rows)
420 {
421 /* Need to make room for the logo */
422 int cnt, erase = vc->vc_video_erase_char, step;
423 unsigned short *save = NULL, *r, *q;
424
425 /*
426 * remove underline attribute from erase character
427 * if black and white framebuffer.
428 */
429 if (fb_get_color_depth(&info->var) == 1)
430 erase &= ~0x400;
431 logo_height = fb_prepare_logo(info);
432 logo_lines = (logo_height + vc->vc_font.height - 1) /
433 vc->vc_font.height;
434 q = (unsigned short *) (vc->vc_origin +
435 vc->vc_size_row * rows);
436 step = logo_lines * cols;
437 for (r = q - logo_lines * cols; r < q; r++)
438 if (scr_readw(r) != vc->vc_video_erase_char)
439 break;
440 if (r != q && new_rows >= rows + logo_lines) {
441 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
442 if (save) {
443 int i = cols < new_cols ? cols : new_cols;
444 scr_memsetw(save, erase, logo_lines * new_cols * 2);
445 r = q - step;
446 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
447 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
448 r = q;
449 }
450 }
451 if (r == q) {
452 /* We can scroll screen down */
453 r = q - step - cols;
454 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
455 scr_memcpyw(r + step, r, vc->vc_size_row);
456 r -= cols;
457 }
458 if (!save) {
459 vc->vc_y += logo_lines;
460 vc->vc_pos += logo_lines * vc->vc_size_row;
461 }
462 }
463 scr_memsetw((unsigned short *) vc->vc_origin,
464 erase,
465 vc->vc_size_row * logo_lines);
466
467 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
468 fbcon_clear_margins(vc, 0);
469 update_screen(vc);
470 }
471
472 if (save) {
473 q = (unsigned short *) (vc->vc_origin +
474 vc->vc_size_row *
475 rows);
476 scr_memcpyw(q, save, logo_lines * new_cols * 2);
477 vc->vc_y += logo_lines;
478 vc->vc_pos += logo_lines * vc->vc_size_row;
479 kfree(save);
480 }
481
482 if (logo_lines > vc->vc_bottom) {
483 logo_shown = FBCON_LOGO_CANSHOW;
484 printk(KERN_INFO
485 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
486 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
487 logo_shown = FBCON_LOGO_DRAW;
488 vc->vc_top = logo_lines;
489 }
490 }
491
492 #ifdef CONFIG_FB_TILEBLITTING
493 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
494 struct display *p)
495 {
496 struct fbcon_ops *ops = info->fbcon_par;
497
498 if ((info->flags & FBINFO_MISC_TILEBLITTING))
499 fbcon_set_tileops(vc, info, p, ops);
500 else
501 fbcon_set_bitops(ops);
502 }
503 #else
504 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
505 struct display *p)
506 {
507 struct fbcon_ops *ops = info->fbcon_par;
508
509 info->flags &= ~FBINFO_MISC_TILEBLITTING;
510 fbcon_set_bitops(ops);
511 }
512 #endif /* CONFIG_MISC_TILEBLITTING */
513
514
515 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
516 int unit, int oldidx)
517 {
518 struct fbcon_ops *ops = NULL;
519 int err = 0;
520
521 if (!try_module_get(info->fbops->owner))
522 err = -ENODEV;
523
524 if (!err && info->fbops->fb_open &&
525 info->fbops->fb_open(info, 0))
526 err = -ENODEV;
527
528 if (!err) {
529 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
530 if (!ops)
531 err = -ENOMEM;
532 }
533
534 if (!err) {
535 memset(ops, 0, sizeof(struct fbcon_ops));
536 info->fbcon_par = ops;
537 set_blitting_type(vc, info, NULL);
538 }
539
540 if (err) {
541 con2fb_map[unit] = oldidx;
542 module_put(info->fbops->owner);
543 }
544
545 return err;
546 }
547
548 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
549 struct fb_info *newinfo, int unit,
550 int oldidx, int found)
551 {
552 struct fbcon_ops *ops = oldinfo->fbcon_par;
553 int err = 0;
554
555 if (oldinfo->fbops->fb_release &&
556 oldinfo->fbops->fb_release(oldinfo, 0)) {
557 con2fb_map[unit] = oldidx;
558 if (!found && newinfo->fbops->fb_release)
559 newinfo->fbops->fb_release(newinfo, 0);
560 if (!found)
561 module_put(newinfo->fbops->owner);
562 err = -ENODEV;
563 }
564
565 if (!err) {
566 if (oldinfo->queue.func == fb_flashcursor)
567 del_timer_sync(&ops->cursor_timer);
568
569 kfree(ops->cursor_state.mask);
570 kfree(ops->cursor_data);
571 kfree(oldinfo->fbcon_par);
572 oldinfo->fbcon_par = NULL;
573 module_put(oldinfo->fbops->owner);
574 }
575
576 return err;
577 }
578
579 static void con2fb_init_newinfo(struct fb_info *info)
580 {
581 if (!info->queue.func || info->queue.func == fb_flashcursor) {
582 struct fbcon_ops *ops = info->fbcon_par;
583
584 if (!info->queue.func)
585 INIT_WORK(&info->queue, fb_flashcursor, info);
586
587 init_timer(&ops->cursor_timer);
588 ops->cursor_timer.function = cursor_timer_handler;
589 ops->cursor_timer.expires = jiffies + HZ / 5;
590 ops->cursor_timer.data = (unsigned long ) info;
591 add_timer(&ops->cursor_timer);
592 }
593 }
594
595 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
596 int unit, int show_logo)
597 {
598 struct fbcon_ops *ops = info->fbcon_par;
599
600 ops->currcon = fg_console;
601
602 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
603 info->fbops->fb_set_par(info);
604
605 ops->flags |= FBCON_FLAGS_INIT;
606 ops->graphics = 0;
607
608 if (vc)
609 fbcon_set_disp(info, &info->var, vc);
610 else
611 fbcon_preset_disp(info, &info->var, unit);
612
613 if (show_logo) {
614 struct vc_data *fg_vc = vc_cons[fg_console].d;
615 struct fb_info *fg_info =
616 registered_fb[con2fb_map[fg_console]];
617
618 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
619 fg_vc->vc_rows, fg_vc->vc_cols,
620 fg_vc->vc_rows);
621 }
622
623 update_screen(vc_cons[fg_console].d);
624 }
625
626 /**
627 * set_con2fb_map - map console to frame buffer device
628 * @unit: virtual console number to map
629 * @newidx: frame buffer index to map virtual console to
630 * @user: user request
631 *
632 * Maps a virtual console @unit to a frame buffer device
633 * @newidx.
634 */
635 static int set_con2fb_map(int unit, int newidx, int user)
636 {
637 struct vc_data *vc = vc_cons[unit].d;
638 int oldidx = con2fb_map[unit];
639 struct fb_info *info = registered_fb[newidx];
640 struct fb_info *oldinfo = NULL;
641 int found, err = 0;
642
643 if (oldidx == newidx)
644 return 0;
645
646 if (!info)
647 err = -EINVAL;
648
649 if (!err && !search_for_mapped_con()) {
650 info_idx = newidx;
651 return fbcon_takeover(0);
652 }
653
654 if (oldidx != -1)
655 oldinfo = registered_fb[oldidx];
656
657 found = search_fb_in_map(newidx);
658
659 acquire_console_sem();
660 con2fb_map[unit] = newidx;
661 if (!err && !found)
662 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
663
664
665 /*
666 * If old fb is not mapped to any of the consoles,
667 * fbcon should release it.
668 */
669 if (!err && oldinfo && !search_fb_in_map(oldidx))
670 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
671 found);
672
673 if (!err) {
674 int show_logo = (fg_console == 0 && !user &&
675 logo_shown != FBCON_LOGO_DONTSHOW);
676
677 if (!found)
678 con2fb_init_newinfo(info);
679 con2fb_map_boot[unit] = newidx;
680 con2fb_init_display(vc, info, unit, show_logo);
681 }
682
683 release_console_sem();
684 return err;
685 }
686
687 /*
688 * Low Level Operations
689 */
690 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
691 static int var_to_display(struct display *disp,
692 struct fb_var_screeninfo *var,
693 struct fb_info *info)
694 {
695 disp->xres_virtual = var->xres_virtual;
696 disp->yres_virtual = var->yres_virtual;
697 disp->bits_per_pixel = var->bits_per_pixel;
698 disp->grayscale = var->grayscale;
699 disp->nonstd = var->nonstd;
700 disp->accel_flags = var->accel_flags;
701 disp->height = var->height;
702 disp->width = var->width;
703 disp->red = var->red;
704 disp->green = var->green;
705 disp->blue = var->blue;
706 disp->transp = var->transp;
707 disp->rotate = var->rotate;
708 disp->mode = fb_match_mode(var, &info->modelist);
709 if (disp->mode == NULL)
710 /* This should not happen */
711 return -EINVAL;
712 return 0;
713 }
714
715 static void display_to_var(struct fb_var_screeninfo *var,
716 struct display *disp)
717 {
718 fb_videomode_to_var(var, disp->mode);
719 var->xres_virtual = disp->xres_virtual;
720 var->yres_virtual = disp->yres_virtual;
721 var->bits_per_pixel = disp->bits_per_pixel;
722 var->grayscale = disp->grayscale;
723 var->nonstd = disp->nonstd;
724 var->accel_flags = disp->accel_flags;
725 var->height = disp->height;
726 var->width = disp->width;
727 var->red = disp->red;
728 var->green = disp->green;
729 var->blue = disp->blue;
730 var->transp = disp->transp;
731 var->rotate = disp->rotate;
732 }
733
734 static const char *fbcon_startup(void)
735 {
736 const char *display_desc = "frame buffer device";
737 struct display *p = &fb_display[fg_console];
738 struct vc_data *vc = vc_cons[fg_console].d;
739 struct font_desc *font = NULL;
740 struct module *owner;
741 struct fb_info *info = NULL;
742 struct fbcon_ops *ops;
743 int rows, cols;
744 int irqres;
745
746 irqres = 1;
747 /*
748 * If num_registered_fb is zero, this is a call for the dummy part.
749 * The frame buffer devices weren't initialized yet.
750 */
751 if (!num_registered_fb || info_idx == -1)
752 return display_desc;
753 /*
754 * Instead of blindly using registered_fb[0], we use info_idx, set by
755 * fb_console_init();
756 */
757 info = registered_fb[info_idx];
758 if (!info)
759 return NULL;
760
761 owner = info->fbops->owner;
762 if (!try_module_get(owner))
763 return NULL;
764 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
765 module_put(owner);
766 return NULL;
767 }
768
769 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
770 if (!ops) {
771 module_put(owner);
772 return NULL;
773 }
774
775 memset(ops, 0, sizeof(struct fbcon_ops));
776 ops->currcon = -1;
777 ops->graphics = 1;
778 info->fbcon_par = ops;
779 set_blitting_type(vc, info, NULL);
780
781 if (info->fix.type != FB_TYPE_TEXT) {
782 if (fbcon_softback_size) {
783 if (!softback_buf) {
784 softback_buf =
785 (unsigned long)
786 kmalloc(fbcon_softback_size,
787 GFP_KERNEL);
788 if (!softback_buf) {
789 fbcon_softback_size = 0;
790 softback_top = 0;
791 }
792 }
793 } else {
794 if (softback_buf) {
795 kfree((void *) softback_buf);
796 softback_buf = 0;
797 softback_top = 0;
798 }
799 }
800 if (softback_buf)
801 softback_in = softback_top = softback_curr =
802 softback_buf;
803 softback_lines = 0;
804 }
805
806 /* Setup default font */
807 if (!p->fontdata) {
808 if (!fontname[0] || !(font = find_font(fontname)))
809 font = get_default_font(info->var.xres,
810 info->var.yres);
811 vc->vc_font.width = font->width;
812 vc->vc_font.height = font->height;
813 vc->vc_font.data = p->fontdata = font->data;
814 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
815 }
816
817 cols = info->var.xres / vc->vc_font.width;
818 rows = info->var.yres / vc->vc_font.height;
819 vc_resize(vc, cols, rows);
820
821 DPRINTK("mode: %s\n", info->fix.id);
822 DPRINTK("visual: %d\n", info->fix.visual);
823 DPRINTK("res: %dx%d-%d\n", info->var.xres,
824 info->var.yres,
825 info->var.bits_per_pixel);
826
827 #ifdef CONFIG_ATARI
828 if (MACH_IS_ATARI) {
829 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
830 irqres =
831 request_irq(IRQ_AUTO_4, fb_vbl_handler,
832 IRQ_TYPE_PRIO, "framebuffer vbl",
833 info);
834 }
835 #endif /* CONFIG_ATARI */
836
837 #ifdef CONFIG_MAC
838 /*
839 * On a Macintoy, the VBL interrupt may or may not be active.
840 * As interrupt based cursor is more reliable and race free, we
841 * probe for VBL interrupts.
842 */
843 if (MACH_IS_MAC) {
844 int ct = 0;
845 /*
846 * Probe for VBL: set temp. handler ...
847 */
848 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
849 "framebuffer vbl", info);
850 vbl_detected = 0;
851
852 /*
853 * ... and spin for 20 ms ...
854 */
855 while (!vbl_detected && ++ct < 1000)
856 udelay(20);
857
858 if (ct == 1000)
859 printk
860 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
861
862 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
863
864 if (vbl_detected) {
865 /*
866 * interrupt based cursor ok
867 */
868 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
869 irqres =
870 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
871 "framebuffer vbl", info);
872 } else {
873 /*
874 * VBL not detected: fall through, use timer based cursor
875 */
876 irqres = 1;
877 }
878 }
879 #endif /* CONFIG_MAC */
880
881 #if defined(__arm__) && defined(IRQ_VSYNCPULSE)
882 cursor_blink_rate = ARM_CURSOR_BLINK_RATE;
883 irqres = request_irq(IRQ_VSYNCPULSE, fb_vbl_handler, SA_SHIRQ,
884 "framebuffer vbl", info);
885 #endif
886 /* Initialize the work queue. If the driver provides its
887 * own work queue this means it will use something besides
888 * default timer to flash the cursor. */
889 if (!info->queue.func) {
890 INIT_WORK(&info->queue, fb_flashcursor, info);
891
892 init_timer(&ops->cursor_timer);
893 ops->cursor_timer.function = cursor_timer_handler;
894 ops->cursor_timer.expires = jiffies + HZ / 5;
895 ops->cursor_timer.data = (unsigned long ) info;
896 add_timer(&ops->cursor_timer);
897 }
898 return display_desc;
899 }
900
901 static void fbcon_init(struct vc_data *vc, int init)
902 {
903 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
904 struct fbcon_ops *ops;
905 struct vc_data **default_mode = vc->vc_display_fg;
906 struct vc_data *svc = *default_mode;
907 struct display *t, *p = &fb_display[vc->vc_num];
908 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
909 int cap = info->flags;
910
911 if (info_idx == -1 || info == NULL)
912 return;
913 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
914 (info->fix.type == FB_TYPE_TEXT))
915 logo = 0;
916
917 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
918
919 if (var_to_display(p, &info->var, info))
920 return;
921
922 /* If we are not the first console on this
923 fb, copy the font from that console */
924 t = &fb_display[svc->vc_num];
925 if (!vc->vc_font.data) {
926 vc->vc_font.data = p->fontdata = t->fontdata;
927 vc->vc_font.width = (*default_mode)->vc_font.width;
928 vc->vc_font.height = (*default_mode)->vc_font.height;
929 p->userfont = t->userfont;
930 if (p->userfont)
931 REFCOUNT(p->fontdata)++;
932 }
933 if (p->userfont)
934 charcnt = FNTCHARCNT(p->fontdata);
935 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
936 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
937 if (charcnt == 256) {
938 vc->vc_hi_font_mask = 0;
939 } else {
940 vc->vc_hi_font_mask = 0x100;
941 if (vc->vc_can_do_color)
942 vc->vc_complement_mask <<= 1;
943 }
944
945 if (!*svc->vc_uni_pagedir_loc)
946 con_set_default_unimap(svc);
947 if (!*vc->vc_uni_pagedir_loc)
948 con_copy_unimap(vc, svc);
949
950 cols = vc->vc_cols;
951 rows = vc->vc_rows;
952 new_cols = info->var.xres / vc->vc_font.width;
953 new_rows = info->var.yres / vc->vc_font.height;
954 vc_resize(vc, new_cols, new_rows);
955
956 ops = info->fbcon_par;
957 /*
958 * We must always set the mode. The mode of the previous console
959 * driver could be in the same resolution but we are using different
960 * hardware so we have to initialize the hardware.
961 *
962 * We need to do it in fbcon_init() to prevent screen corruption.
963 */
964 if (CON_IS_VISIBLE(vc)) {
965 if (info->fbops->fb_set_par &&
966 !(ops->flags & FBCON_FLAGS_INIT))
967 info->fbops->fb_set_par(info);
968 ops->flags |= FBCON_FLAGS_INIT;
969 }
970
971 ops->graphics = 0;
972
973 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
974 !(cap & FBINFO_HWACCEL_DISABLED))
975 p->scrollmode = SCROLL_MOVE;
976 else /* default to something safe */
977 p->scrollmode = SCROLL_REDRAW;
978
979 /*
980 * ++guenther: console.c:vc_allocate() relies on initializing
981 * vc_{cols,rows}, but we must not set those if we are only
982 * resizing the console.
983 */
984 if (!init) {
985 vc->vc_cols = new_cols;
986 vc->vc_rows = new_rows;
987 }
988
989 if (logo)
990 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
991
992 if (vc == svc && softback_buf) {
993 int l = fbcon_softback_size / vc->vc_size_row;
994 if (l > 5)
995 softback_end = softback_buf + l * vc->vc_size_row;
996 else {
997 /* Smaller scrollback makes no sense, and 0 would screw
998 the operation totally */
999 softback_top = 0;
1000 }
1001 }
1002 }
1003
1004 static void fbcon_deinit(struct vc_data *vc)
1005 {
1006 struct display *p = &fb_display[vc->vc_num];
1007
1008 if (info_idx != -1)
1009 return;
1010 fbcon_free_font(p);
1011 }
1012
1013 /* ====================================================================== */
1014
1015 /* fbcon_XXX routines - interface used by the world
1016 *
1017 * This system is now divided into two levels because of complications
1018 * caused by hardware scrolling. Top level functions:
1019 *
1020 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1021 *
1022 * handles y values in range [0, scr_height-1] that correspond to real
1023 * screen positions. y_wrap shift means that first line of bitmap may be
1024 * anywhere on this display. These functions convert lineoffsets to
1025 * bitmap offsets and deal with the wrap-around case by splitting blits.
1026 *
1027 * fbcon_bmove_physical_8() -- These functions fast implementations
1028 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1029 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1030 *
1031 * WARNING:
1032 *
1033 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1034 * Implies should only really hardware scroll in rows. Only reason for
1035 * restriction is simplicity & efficiency at the moment.
1036 */
1037
1038 static __inline__ int real_y(struct display *p, int ypos)
1039 {
1040 int rows = p->vrows;
1041
1042 ypos += p->yscroll;
1043 return ypos < rows ? ypos : ypos - rows;
1044 }
1045
1046
1047 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1048 int width)
1049 {
1050 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1051 struct fbcon_ops *ops = info->fbcon_par;
1052
1053 struct display *p = &fb_display[vc->vc_num];
1054 u_int y_break;
1055
1056 if (fbcon_is_inactive(vc, info))
1057 return;
1058
1059 if (!height || !width)
1060 return;
1061
1062 /* Split blits that cross physical y_wrap boundary */
1063
1064 y_break = p->vrows - p->yscroll;
1065 if (sy < y_break && sy + height - 1 >= y_break) {
1066 u_int b = y_break - sy;
1067 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1068 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1069 width);
1070 } else
1071 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1072 }
1073
1074 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1075 int count, int ypos, int xpos)
1076 {
1077 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1078 struct display *p = &fb_display[vc->vc_num];
1079 struct fbcon_ops *ops = info->fbcon_par;
1080
1081 if (!fbcon_is_inactive(vc, info))
1082 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1083 get_color(vc, info, scr_readw(s), 1),
1084 get_color(vc, info, scr_readw(s), 0));
1085 }
1086
1087 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1088 {
1089 unsigned short chr;
1090
1091 scr_writew(c, &chr);
1092 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1093 }
1094
1095 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1096 {
1097 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1098 struct fbcon_ops *ops = info->fbcon_par;
1099
1100 if (!fbcon_is_inactive(vc, info))
1101 ops->clear_margins(vc, info, bottom_only);
1102 }
1103
1104 static void fbcon_cursor(struct vc_data *vc, int mode)
1105 {
1106 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1107 struct fbcon_ops *ops = info->fbcon_par;
1108 struct display *p = &fb_display[vc->vc_num];
1109 int y;
1110 int c = scr_readw((u16 *) vc->vc_pos);
1111
1112 if (fbcon_is_inactive(vc, info))
1113 return;
1114
1115 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1116 if (mode & CM_SOFTBACK) {
1117 mode &= ~CM_SOFTBACK;
1118 y = softback_lines;
1119 } else {
1120 if (softback_lines)
1121 fbcon_set_origin(vc);
1122 y = 0;
1123 }
1124
1125 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1126 get_color(vc, info, c, 0));
1127 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1128 }
1129
1130 static int scrollback_phys_max = 0;
1131 static int scrollback_max = 0;
1132 static int scrollback_current = 0;
1133
1134 static int update_var(int con, struct fb_info *info)
1135 {
1136 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1137 return fb_pan_display(info, &info->var);
1138 return 0;
1139 }
1140
1141 /*
1142 * If no vc is existent yet, just set struct display
1143 */
1144 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1145 int unit)
1146 {
1147 struct display *p = &fb_display[unit];
1148 struct display *t = &fb_display[fg_console];
1149
1150 var->xoffset = var->yoffset = p->yscroll = 0;
1151 if (var_to_display(p, var, info))
1152 return;
1153
1154 p->fontdata = t->fontdata;
1155 p->userfont = t->userfont;
1156 if (p->userfont)
1157 REFCOUNT(p->fontdata)++;
1158 }
1159
1160 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1161 struct vc_data *vc)
1162 {
1163 struct display *p = &fb_display[vc->vc_num], *t;
1164 struct vc_data **default_mode = vc->vc_display_fg;
1165 struct vc_data *svc = *default_mode;
1166 int rows, cols, charcnt = 256;
1167
1168 var->xoffset = var->yoffset = p->yscroll = 0;
1169 if (var_to_display(p, var, info))
1170 return;
1171 t = &fb_display[svc->vc_num];
1172 if (!vc->vc_font.data) {
1173 vc->vc_font.data = p->fontdata = t->fontdata;
1174 vc->vc_font.width = (*default_mode)->vc_font.width;
1175 vc->vc_font.height = (*default_mode)->vc_font.height;
1176 p->userfont = t->userfont;
1177 if (p->userfont)
1178 REFCOUNT(p->fontdata)++;
1179 }
1180 if (p->userfont)
1181 charcnt = FNTCHARCNT(p->fontdata);
1182
1183 vc->vc_can_do_color = (fb_get_color_depth(var) != 1);
1184 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1185 if (charcnt == 256) {
1186 vc->vc_hi_font_mask = 0;
1187 } else {
1188 vc->vc_hi_font_mask = 0x100;
1189 if (vc->vc_can_do_color)
1190 vc->vc_complement_mask <<= 1;
1191 }
1192
1193 if (!*svc->vc_uni_pagedir_loc)
1194 con_set_default_unimap(svc);
1195 if (!*vc->vc_uni_pagedir_loc)
1196 con_copy_unimap(vc, svc);
1197
1198 cols = var->xres / vc->vc_font.width;
1199 rows = var->yres / vc->vc_font.height;
1200 vc_resize(vc, cols, rows);
1201 if (CON_IS_VISIBLE(vc)) {
1202 update_screen(vc);
1203 if (softback_buf) {
1204 int l = fbcon_softback_size / vc->vc_size_row;
1205
1206 if (l > 5)
1207 softback_end = softback_buf + l *
1208 vc->vc_size_row;
1209 else {
1210 /* Smaller scrollback makes no sense, and 0
1211 would screw the operation totally */
1212 softback_top = 0;
1213 }
1214 }
1215 }
1216 }
1217
1218 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1219 {
1220 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1221 struct display *p = &fb_display[vc->vc_num];
1222
1223 p->yscroll += count;
1224 if (p->yscroll >= p->vrows) /* Deal with wrap */
1225 p->yscroll -= p->vrows;
1226 info->var.xoffset = 0;
1227 info->var.yoffset = p->yscroll * vc->vc_font.height;
1228 info->var.vmode |= FB_VMODE_YWRAP;
1229 update_var(vc->vc_num, info);
1230 scrollback_max += count;
1231 if (scrollback_max > scrollback_phys_max)
1232 scrollback_max = scrollback_phys_max;
1233 scrollback_current = 0;
1234 }
1235
1236 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1237 {
1238 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1239 struct display *p = &fb_display[vc->vc_num];
1240
1241 p->yscroll -= count;
1242 if (p->yscroll < 0) /* Deal with wrap */
1243 p->yscroll += p->vrows;
1244 info->var.xoffset = 0;
1245 info->var.yoffset = p->yscroll * vc->vc_font.height;
1246 info->var.vmode |= FB_VMODE_YWRAP;
1247 update_var(vc->vc_num, info);
1248 scrollback_max -= count;
1249 if (scrollback_max < 0)
1250 scrollback_max = 0;
1251 scrollback_current = 0;
1252 }
1253
1254 static __inline__ void ypan_up(struct vc_data *vc, int count)
1255 {
1256 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1257 struct display *p = &fb_display[vc->vc_num];
1258 struct fbcon_ops *ops = info->fbcon_par;
1259
1260 p->yscroll += count;
1261 if (p->yscroll > p->vrows - vc->vc_rows) {
1262 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1263 0, 0, 0, vc->vc_rows, vc->vc_cols);
1264 p->yscroll -= p->vrows - vc->vc_rows;
1265 }
1266 info->var.xoffset = 0;
1267 info->var.yoffset = p->yscroll * vc->vc_font.height;
1268 info->var.vmode &= ~FB_VMODE_YWRAP;
1269 update_var(vc->vc_num, info);
1270 fbcon_clear_margins(vc, 1);
1271 scrollback_max += count;
1272 if (scrollback_max > scrollback_phys_max)
1273 scrollback_max = scrollback_phys_max;
1274 scrollback_current = 0;
1275 }
1276
1277 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, 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 int redraw = 0;
1282
1283 p->yscroll += count;
1284 if (p->yscroll > p->vrows - vc->vc_rows) {
1285 p->yscroll -= p->vrows - vc->vc_rows;
1286 redraw = 1;
1287 }
1288
1289 info->var.xoffset = 0;
1290 info->var.yoffset = p->yscroll * vc->vc_font.height;
1291 info->var.vmode &= ~FB_VMODE_YWRAP;
1292 if (redraw)
1293 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1294 update_var(vc->vc_num, info);
1295 fbcon_clear_margins(vc, 1);
1296 scrollback_max += count;
1297 if (scrollback_max > scrollback_phys_max)
1298 scrollback_max = scrollback_phys_max;
1299 scrollback_current = 0;
1300 }
1301
1302 static __inline__ void ypan_down(struct vc_data *vc, int count)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct display *p = &fb_display[vc->vc_num];
1306 struct fbcon_ops *ops = info->fbcon_par;
1307
1308 p->yscroll -= count;
1309 if (p->yscroll < 0) {
1310 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1311 0, vc->vc_rows, vc->vc_cols);
1312 p->yscroll += p->vrows - vc->vc_rows;
1313 }
1314 info->var.xoffset = 0;
1315 info->var.yoffset = p->yscroll * vc->vc_font.height;
1316 info->var.vmode &= ~FB_VMODE_YWRAP;
1317 update_var(vc->vc_num, info);
1318 fbcon_clear_margins(vc, 1);
1319 scrollback_max -= count;
1320 if (scrollback_max < 0)
1321 scrollback_max = 0;
1322 scrollback_current = 0;
1323 }
1324
1325 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, 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 int redraw = 0;
1330
1331 p->yscroll -= count;
1332 if (p->yscroll < 0) {
1333 p->yscroll += p->vrows - vc->vc_rows;
1334 redraw = 1;
1335 }
1336 info->var.xoffset = 0;
1337 info->var.yoffset = p->yscroll * vc->vc_font.height;
1338 info->var.vmode &= ~FB_VMODE_YWRAP;
1339 if (redraw)
1340 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1341 update_var(vc->vc_num, info);
1342 fbcon_clear_margins(vc, 1);
1343 scrollback_max -= count;
1344 if (scrollback_max < 0)
1345 scrollback_max = 0;
1346 scrollback_current = 0;
1347 }
1348
1349 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1350 long delta)
1351 {
1352 int count = vc->vc_rows;
1353 unsigned short *d, *s;
1354 unsigned long n;
1355 int line = 0;
1356
1357 d = (u16 *) softback_curr;
1358 if (d == (u16 *) softback_in)
1359 d = (u16 *) vc->vc_origin;
1360 n = softback_curr + delta * vc->vc_size_row;
1361 softback_lines -= delta;
1362 if (delta < 0) {
1363 if (softback_curr < softback_top && n < softback_buf) {
1364 n += softback_end - softback_buf;
1365 if (n < softback_top) {
1366 softback_lines -=
1367 (softback_top - n) / vc->vc_size_row;
1368 n = softback_top;
1369 }
1370 } else if (softback_curr >= softback_top
1371 && n < softback_top) {
1372 softback_lines -=
1373 (softback_top - n) / vc->vc_size_row;
1374 n = softback_top;
1375 }
1376 } else {
1377 if (softback_curr > softback_in && n >= softback_end) {
1378 n += softback_buf - softback_end;
1379 if (n > softback_in) {
1380 n = softback_in;
1381 softback_lines = 0;
1382 }
1383 } else if (softback_curr <= softback_in && n > softback_in) {
1384 n = softback_in;
1385 softback_lines = 0;
1386 }
1387 }
1388 if (n == softback_curr)
1389 return;
1390 softback_curr = n;
1391 s = (u16 *) softback_curr;
1392 if (s == (u16 *) softback_in)
1393 s = (u16 *) vc->vc_origin;
1394 while (count--) {
1395 unsigned short *start;
1396 unsigned short *le;
1397 unsigned short c;
1398 int x = 0;
1399 unsigned short attr = 1;
1400
1401 start = s;
1402 le = advance_row(s, 1);
1403 do {
1404 c = scr_readw(s);
1405 if (attr != (c & 0xff00)) {
1406 attr = c & 0xff00;
1407 if (s > start) {
1408 fbcon_putcs(vc, start, s - start,
1409 line, x);
1410 x += s - start;
1411 start = s;
1412 }
1413 }
1414 if (c == scr_readw(d)) {
1415 if (s > start) {
1416 fbcon_putcs(vc, start, s - start,
1417 line, x);
1418 x += s - start + 1;
1419 start = s + 1;
1420 } else {
1421 x++;
1422 start++;
1423 }
1424 }
1425 s++;
1426 d++;
1427 } while (s < le);
1428 if (s > start)
1429 fbcon_putcs(vc, start, s - start, line, x);
1430 line++;
1431 if (d == (u16 *) softback_end)
1432 d = (u16 *) softback_buf;
1433 if (d == (u16 *) softback_in)
1434 d = (u16 *) vc->vc_origin;
1435 if (s == (u16 *) softback_end)
1436 s = (u16 *) softback_buf;
1437 if (s == (u16 *) softback_in)
1438 s = (u16 *) vc->vc_origin;
1439 }
1440 }
1441
1442 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1443 int line, int count, int dy)
1444 {
1445 unsigned short *s = (unsigned short *)
1446 (vc->vc_origin + vc->vc_size_row * line);
1447
1448 while (count--) {
1449 unsigned short *start = s;
1450 unsigned short *le = advance_row(s, 1);
1451 unsigned short c;
1452 int x = 0;
1453 unsigned short attr = 1;
1454
1455 do {
1456 c = scr_readw(s);
1457 if (attr != (c & 0xff00)) {
1458 attr = c & 0xff00;
1459 if (s > start) {
1460 fbcon_putcs(vc, start, s - start,
1461 dy, x);
1462 x += s - start;
1463 start = s;
1464 }
1465 }
1466 console_conditional_schedule();
1467 s++;
1468 } while (s < le);
1469 if (s > start)
1470 fbcon_putcs(vc, start, s - start, dy, x);
1471 console_conditional_schedule();
1472 dy++;
1473 }
1474 }
1475
1476 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1477 int line, int count, int offset)
1478 {
1479 unsigned short *d = (unsigned short *)
1480 (vc->vc_origin + vc->vc_size_row * line);
1481 unsigned short *s = d + offset;
1482
1483 while (count--) {
1484 unsigned short *start = s;
1485 unsigned short *le = advance_row(s, 1);
1486 unsigned short c;
1487 int x = 0;
1488 unsigned short attr = 1;
1489
1490 do {
1491 c = scr_readw(s);
1492 if (attr != (c & 0xff00)) {
1493 attr = c & 0xff00;
1494 if (s > start) {
1495 fbcon_putcs(vc, start, s - start,
1496 line, x);
1497 x += s - start;
1498 start = s;
1499 }
1500 }
1501 if (c == scr_readw(d)) {
1502 if (s > start) {
1503 fbcon_putcs(vc, start, s - start,
1504 line, x);
1505 x += s - start + 1;
1506 start = s + 1;
1507 } else {
1508 x++;
1509 start++;
1510 }
1511 }
1512 scr_writew(c, d);
1513 console_conditional_schedule();
1514 s++;
1515 d++;
1516 } while (s < le);
1517 if (s > start)
1518 fbcon_putcs(vc, start, s - start, line, x);
1519 console_conditional_schedule();
1520 if (offset > 0)
1521 line++;
1522 else {
1523 line--;
1524 /* NOTE: We subtract two lines from these pointers */
1525 s -= vc->vc_size_row;
1526 d -= vc->vc_size_row;
1527 }
1528 }
1529 }
1530
1531 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1532 int count)
1533 {
1534 unsigned short *p;
1535
1536 if (vc->vc_num != fg_console)
1537 return;
1538 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1539
1540 while (count) {
1541 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1542 count--;
1543 p = advance_row(p, 1);
1544 softback_in += vc->vc_size_row;
1545 if (softback_in == softback_end)
1546 softback_in = softback_buf;
1547 if (softback_in == softback_top) {
1548 softback_top += vc->vc_size_row;
1549 if (softback_top == softback_end)
1550 softback_top = softback_buf;
1551 }
1552 }
1553 softback_curr = softback_in;
1554 }
1555
1556 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1557 int count)
1558 {
1559 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1560 struct display *p = &fb_display[vc->vc_num];
1561 struct fbcon_ops *ops = info->fbcon_par;
1562 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1563
1564 if (fbcon_is_inactive(vc, info))
1565 return -EINVAL;
1566
1567 fbcon_cursor(vc, CM_ERASE);
1568
1569 /*
1570 * ++Geert: Only use ywrap/ypan if the console is in text mode
1571 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1572 * whole screen (prevents flicker).
1573 */
1574
1575 switch (dir) {
1576 case SM_UP:
1577 if (count > vc->vc_rows) /* Maximum realistic size */
1578 count = vc->vc_rows;
1579 if (softback_top)
1580 fbcon_softback_note(vc, t, count);
1581 if (logo_shown >= 0)
1582 goto redraw_up;
1583 switch (p->scrollmode) {
1584 case SCROLL_MOVE:
1585 ops->bmove(vc, info, t + count, 0, t, 0,
1586 b - t - count, vc->vc_cols);
1587 ops->clear(vc, info, b - count, 0, count,
1588 vc->vc_cols);
1589 break;
1590
1591 case SCROLL_WRAP_MOVE:
1592 if (b - t - count > 3 * vc->vc_rows >> 2) {
1593 if (t > 0)
1594 fbcon_bmove(vc, 0, 0, count, 0, t,
1595 vc->vc_cols);
1596 ywrap_up(vc, count);
1597 if (vc->vc_rows - b > 0)
1598 fbcon_bmove(vc, b - count, 0, b, 0,
1599 vc->vc_rows - b,
1600 vc->vc_cols);
1601 } else if (info->flags & FBINFO_READS_FAST)
1602 fbcon_bmove(vc, t + count, 0, t, 0,
1603 b - t - count, vc->vc_cols);
1604 else
1605 goto redraw_up;
1606 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1607 break;
1608
1609 case SCROLL_PAN_REDRAW:
1610 if ((p->yscroll + count <=
1611 2 * (p->vrows - vc->vc_rows))
1612 && ((!scroll_partial && (b - t == vc->vc_rows))
1613 || (scroll_partial
1614 && (b - t - count >
1615 3 * vc->vc_rows >> 2)))) {
1616 if (t > 0)
1617 fbcon_redraw_move(vc, p, 0, t, count);
1618 ypan_up_redraw(vc, t, count);
1619 if (vc->vc_rows - b > 0)
1620 fbcon_redraw_move(vc, p, b - count,
1621 vc->vc_rows - b, b);
1622 } else
1623 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1624 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1625 break;
1626
1627 case SCROLL_PAN_MOVE:
1628 if ((p->yscroll + count <=
1629 2 * (p->vrows - vc->vc_rows))
1630 && ((!scroll_partial && (b - t == vc->vc_rows))
1631 || (scroll_partial
1632 && (b - t - count >
1633 3 * vc->vc_rows >> 2)))) {
1634 if (t > 0)
1635 fbcon_bmove(vc, 0, 0, count, 0, t,
1636 vc->vc_cols);
1637 ypan_up(vc, count);
1638 if (vc->vc_rows - b > 0)
1639 fbcon_bmove(vc, b - count, 0, b, 0,
1640 vc->vc_rows - b,
1641 vc->vc_cols);
1642 } else if (info->flags & FBINFO_READS_FAST)
1643 fbcon_bmove(vc, t + count, 0, t, 0,
1644 b - t - count, vc->vc_cols);
1645 else
1646 goto redraw_up;
1647 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1648 break;
1649
1650 case SCROLL_REDRAW:
1651 redraw_up:
1652 fbcon_redraw(vc, p, t, b - t - count,
1653 count * vc->vc_cols);
1654 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1655 scr_memsetw((unsigned short *) (vc->vc_origin +
1656 vc->vc_size_row *
1657 (b - count)),
1658 vc->vc_video_erase_char,
1659 vc->vc_size_row * count);
1660 return 1;
1661 }
1662 break;
1663
1664 case SM_DOWN:
1665 if (count > vc->vc_rows) /* Maximum realistic size */
1666 count = vc->vc_rows;
1667 switch (p->scrollmode) {
1668 case SCROLL_MOVE:
1669 ops->bmove(vc, info, t, 0, t + count, 0,
1670 b - t - count, vc->vc_cols);
1671 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1672 break;
1673
1674 case SCROLL_WRAP_MOVE:
1675 if (b - t - count > 3 * vc->vc_rows >> 2) {
1676 if (vc->vc_rows - b > 0)
1677 fbcon_bmove(vc, b, 0, b - count, 0,
1678 vc->vc_rows - b,
1679 vc->vc_cols);
1680 ywrap_down(vc, count);
1681 if (t > 0)
1682 fbcon_bmove(vc, count, 0, 0, 0, t,
1683 vc->vc_cols);
1684 } else if (info->flags & FBINFO_READS_FAST)
1685 fbcon_bmove(vc, t, 0, t + count, 0,
1686 b - t - count, vc->vc_cols);
1687 else
1688 goto redraw_down;
1689 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1690 break;
1691
1692 case SCROLL_PAN_MOVE:
1693 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1694 && ((!scroll_partial && (b - t == vc->vc_rows))
1695 || (scroll_partial
1696 && (b - t - count >
1697 3 * vc->vc_rows >> 2)))) {
1698 if (vc->vc_rows - b > 0)
1699 fbcon_bmove(vc, b, 0, b - count, 0,
1700 vc->vc_rows - b,
1701 vc->vc_cols);
1702 ypan_down(vc, count);
1703 if (t > 0)
1704 fbcon_bmove(vc, count, 0, 0, 0, t,
1705 vc->vc_cols);
1706 } else if (info->flags & FBINFO_READS_FAST)
1707 fbcon_bmove(vc, t, 0, t + count, 0,
1708 b - t - count, vc->vc_cols);
1709 else
1710 goto redraw_down;
1711 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1712 break;
1713
1714 case SCROLL_PAN_REDRAW:
1715 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1716 && ((!scroll_partial && (b - t == vc->vc_rows))
1717 || (scroll_partial
1718 && (b - t - count >
1719 3 * vc->vc_rows >> 2)))) {
1720 if (vc->vc_rows - b > 0)
1721 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1722 b - count);
1723 ypan_down_redraw(vc, t, count);
1724 if (t > 0)
1725 fbcon_redraw_move(vc, p, count, t, 0);
1726 } else
1727 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1728 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1729 break;
1730
1731 case SCROLL_REDRAW:
1732 redraw_down:
1733 fbcon_redraw(vc, p, b - 1, b - t - count,
1734 -count * vc->vc_cols);
1735 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1736 scr_memsetw((unsigned short *) (vc->vc_origin +
1737 vc->vc_size_row *
1738 t),
1739 vc->vc_video_erase_char,
1740 vc->vc_size_row * count);
1741 return 1;
1742 }
1743 }
1744 return 0;
1745 }
1746
1747
1748 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1749 int height, int width)
1750 {
1751 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1752 struct display *p = &fb_display[vc->vc_num];
1753
1754 if (fbcon_is_inactive(vc, info))
1755 return;
1756
1757 if (!width || !height)
1758 return;
1759
1760 /* Split blits that cross physical y_wrap case.
1761 * Pathological case involves 4 blits, better to use recursive
1762 * code rather than unrolled case
1763 *
1764 * Recursive invocations don't need to erase the cursor over and
1765 * over again, so we use fbcon_bmove_rec()
1766 */
1767 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1768 p->vrows - p->yscroll);
1769 }
1770
1771 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1772 int dy, int dx, int height, int width, u_int y_break)
1773 {
1774 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1775 struct fbcon_ops *ops = info->fbcon_par;
1776 u_int b;
1777
1778 if (sy < y_break && sy + height > y_break) {
1779 b = y_break - sy;
1780 if (dy < sy) { /* Avoid trashing self */
1781 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1782 y_break);
1783 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1784 height - b, width, y_break);
1785 } else {
1786 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1787 height - b, width, y_break);
1788 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1789 y_break);
1790 }
1791 return;
1792 }
1793
1794 if (dy < y_break && dy + height > y_break) {
1795 b = y_break - dy;
1796 if (dy < sy) { /* Avoid trashing self */
1797 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1798 y_break);
1799 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1800 height - b, width, y_break);
1801 } else {
1802 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1803 height - b, width, y_break);
1804 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1805 y_break);
1806 }
1807 return;
1808 }
1809 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1810 height, width);
1811 }
1812
1813 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1814 struct vc_data *vc)
1815 {
1816 int fh = vc->vc_font.height;
1817 int cap = info->flags;
1818 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1819 && divides(info->fix.ypanstep, vc->vc_font.height)
1820 && info->var.yres_virtual > info->var.yres;
1821 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1822 && divides(info->fix.ywrapstep, vc->vc_font.height)
1823 && divides(vc->vc_font.height, info->var.yres_virtual);
1824 int reading_fast = cap & FBINFO_READS_FAST;
1825 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1826 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1827
1828 p->vrows = info->var.yres_virtual/fh;
1829 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1830 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1831 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1832 info->var.yres % fh))
1833 p->vrows--;
1834
1835 if (good_wrap || good_pan) {
1836 if (reading_fast || fast_copyarea)
1837 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1838 else
1839 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1840 SCROLL_PAN_REDRAW;
1841 } else {
1842 if (reading_fast || (fast_copyarea && !fast_imageblit))
1843 p->scrollmode = SCROLL_MOVE;
1844 else
1845 p->scrollmode = SCROLL_REDRAW;
1846 }
1847 }
1848
1849 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1850 unsigned int height)
1851 {
1852 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1853 struct display *p = &fb_display[vc->vc_num];
1854 struct fb_var_screeninfo var = info->var;
1855 int x_diff, y_diff;
1856 int fw = vc->vc_font.width;
1857 int fh = vc->vc_font.height;
1858
1859 var.xres = width * fw;
1860 var.yres = height * fh;
1861 x_diff = info->var.xres - var.xres;
1862 y_diff = info->var.yres - var.yres;
1863 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1864 struct fb_videomode *mode;
1865
1866 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1867 mode = fb_find_best_mode(&var, &info->modelist);
1868 if (mode == NULL)
1869 return -EINVAL;
1870 fb_videomode_to_var(&var, mode);
1871 if (width > var.xres/fw || height > var.yres/fh)
1872 return -EINVAL;
1873 /*
1874 * The following can probably have any value... Do we need to
1875 * set all of them?
1876 */
1877 var.bits_per_pixel = p->bits_per_pixel;
1878 var.xres_virtual = p->xres_virtual;
1879 var.yres_virtual = p->yres_virtual;
1880 var.accel_flags = p->accel_flags;
1881 var.width = p->width;
1882 var.height = p->height;
1883 var.red = p->red;
1884 var.green = p->green;
1885 var.blue = p->blue;
1886 var.transp = p->transp;
1887 var.nonstd = p->nonstd;
1888
1889 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1890 if (CON_IS_VISIBLE(vc)) {
1891 var.activate = FB_ACTIVATE_NOW |
1892 FB_ACTIVATE_FORCE;
1893 fb_set_var(info, &var);
1894 }
1895 var_to_display(p, &info->var, info);
1896 }
1897 updatescrollmode(p, info, vc);
1898 return 0;
1899 }
1900
1901 static int fbcon_switch(struct vc_data *vc)
1902 {
1903 struct fb_info *info;
1904 struct display *p = &fb_display[vc->vc_num];
1905 struct fb_var_screeninfo var;
1906 int i, prev_console;
1907
1908 info = registered_fb[con2fb_map[vc->vc_num]];
1909
1910 if (softback_top) {
1911 int l = fbcon_softback_size / vc->vc_size_row;
1912 if (softback_lines)
1913 fbcon_set_origin(vc);
1914 softback_top = softback_curr = softback_in = softback_buf;
1915 softback_lines = 0;
1916
1917 if (l > 5)
1918 softback_end = softback_buf + l * vc->vc_size_row;
1919 else {
1920 /* Smaller scrollback makes no sense, and 0 would screw
1921 the operation totally */
1922 softback_top = 0;
1923 }
1924 }
1925
1926 if (logo_shown >= 0) {
1927 struct vc_data *conp2 = vc_cons[logo_shown].d;
1928
1929 if (conp2->vc_top == logo_lines
1930 && conp2->vc_bottom == conp2->vc_rows)
1931 conp2->vc_top = 0;
1932 logo_shown = FBCON_LOGO_CANSHOW;
1933 }
1934
1935 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
1936
1937 /*
1938 * FIXME: If we have multiple fbdev's loaded, we need to
1939 * update all info->currcon. Perhaps, we can place this
1940 * in a centralized structure, but this might break some
1941 * drivers.
1942 *
1943 * info->currcon = vc->vc_num;
1944 */
1945 for (i = 0; i < FB_MAX; i++) {
1946 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1947 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1948
1949 ops->currcon = vc->vc_num;
1950 }
1951 }
1952 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1953 display_to_var(&var, p);
1954 var.activate = FB_ACTIVATE_NOW;
1955
1956 /*
1957 * make sure we don't unnecessarily trip the memcmp()
1958 * in fb_set_var()
1959 */
1960 info->var.activate = var.activate;
1961 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1962 fb_set_var(info, &var);
1963
1964 if (prev_console != -1 &&
1965 registered_fb[con2fb_map[prev_console]] != info &&
1966 info->fbops->fb_set_par)
1967 info->fbops->fb_set_par(info);
1968
1969 set_blitting_type(vc, info, p);
1970 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1971
1972 vc->vc_can_do_color = (fb_get_color_depth(&info->var) != 1);
1973 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1974 updatescrollmode(p, info, vc);
1975
1976 switch (p->scrollmode) {
1977 case SCROLL_WRAP_MOVE:
1978 scrollback_phys_max = p->vrows - vc->vc_rows;
1979 break;
1980 case SCROLL_PAN_MOVE:
1981 case SCROLL_PAN_REDRAW:
1982 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
1983 if (scrollback_phys_max < 0)
1984 scrollback_phys_max = 0;
1985 break;
1986 default:
1987 scrollback_phys_max = 0;
1988 break;
1989 }
1990 scrollback_max = 0;
1991 scrollback_current = 0;
1992
1993 update_var(vc->vc_num, info);
1994 fbcon_set_palette(vc, color_table);
1995 fbcon_clear_margins(vc, 0);
1996
1997 if (logo_shown == FBCON_LOGO_DRAW) {
1998
1999 logo_shown = fg_console;
2000 /* This is protected above by initmem_freed */
2001 fb_show_logo(info);
2002 update_region(vc,
2003 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2004 vc->vc_size_row * (vc->vc_bottom -
2005 vc->vc_top) / 2);
2006 return 0;
2007 }
2008 return 1;
2009 }
2010
2011 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2012 int blank)
2013 {
2014 if (blank) {
2015 unsigned short charmask = vc->vc_hi_font_mask ?
2016 0x1ff : 0xff;
2017 unsigned short oldc;
2018
2019 oldc = vc->vc_video_erase_char;
2020 vc->vc_video_erase_char &= charmask;
2021 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2022 vc->vc_video_erase_char = oldc;
2023 }
2024 }
2025
2026 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2027 {
2028 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2029 struct fbcon_ops *ops = info->fbcon_par;
2030
2031 if (mode_switch) {
2032 struct fb_var_screeninfo var = info->var;
2033
2034 ops->graphics = 1;
2035
2036 if (!blank) {
2037 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2038 fb_set_var(info, &var);
2039 ops->graphics = 0;
2040 }
2041 }
2042
2043 if (!fbcon_is_inactive(vc, info)) {
2044 if (ops->blank_state != blank) {
2045 ops->blank_state = blank;
2046 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2047 ops->cursor_flash = (!blank);
2048
2049 if (fb_blank(info, blank))
2050 fbcon_generic_blank(vc, info, blank);
2051 }
2052
2053 if (!blank)
2054 update_screen(vc);
2055 }
2056
2057 return 0;
2058 }
2059
2060 static void fbcon_free_font(struct display *p)
2061 {
2062 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2063 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2064 p->fontdata = NULL;
2065 p->userfont = 0;
2066 }
2067
2068 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2069 {
2070 u8 *fontdata = vc->vc_font.data;
2071 u8 *data = font->data;
2072 int i, j;
2073
2074 font->width = vc->vc_font.width;
2075 font->height = vc->vc_font.height;
2076 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2077 if (!font->data)
2078 return 0;
2079
2080 if (font->width <= 8) {
2081 j = vc->vc_font.height;
2082 for (i = 0; i < font->charcount; i++) {
2083 memcpy(data, fontdata, j);
2084 memset(data + j, 0, 32 - j);
2085 data += 32;
2086 fontdata += j;
2087 }
2088 } else if (font->width <= 16) {
2089 j = vc->vc_font.height * 2;
2090 for (i = 0; i < font->charcount; i++) {
2091 memcpy(data, fontdata, j);
2092 memset(data + j, 0, 64 - j);
2093 data += 64;
2094 fontdata += j;
2095 }
2096 } else if (font->width <= 24) {
2097 for (i = 0; i < font->charcount; i++) {
2098 for (j = 0; j < vc->vc_font.height; j++) {
2099 *data++ = fontdata[0];
2100 *data++ = fontdata[1];
2101 *data++ = fontdata[2];
2102 fontdata += sizeof(u32);
2103 }
2104 memset(data, 0, 3 * (32 - j));
2105 data += 3 * (32 - j);
2106 }
2107 } else {
2108 j = vc->vc_font.height * 4;
2109 for (i = 0; i < font->charcount; i++) {
2110 memcpy(data, fontdata, j);
2111 memset(data + j, 0, 128 - j);
2112 data += 128;
2113 fontdata += j;
2114 }
2115 }
2116 return 0;
2117 }
2118
2119 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2120 u8 * data, int userfont)
2121 {
2122 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2123 struct display *p = &fb_display[vc->vc_num];
2124 int resize;
2125 int cnt;
2126 char *old_data = NULL;
2127
2128 if (CON_IS_VISIBLE(vc) && softback_lines)
2129 fbcon_set_origin(vc);
2130
2131 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2132 if (p->userfont)
2133 old_data = vc->vc_font.data;
2134 if (userfont)
2135 cnt = FNTCHARCNT(data);
2136 else
2137 cnt = 256;
2138 vc->vc_font.data = p->fontdata = data;
2139 if ((p->userfont = userfont))
2140 REFCOUNT(data)++;
2141 vc->vc_font.width = w;
2142 vc->vc_font.height = h;
2143 if (vc->vc_hi_font_mask && cnt == 256) {
2144 vc->vc_hi_font_mask = 0;
2145 if (vc->vc_can_do_color) {
2146 vc->vc_complement_mask >>= 1;
2147 vc->vc_s_complement_mask >>= 1;
2148 }
2149
2150 /* ++Edmund: reorder the attribute bits */
2151 if (vc->vc_can_do_color) {
2152 unsigned short *cp =
2153 (unsigned short *) vc->vc_origin;
2154 int count = vc->vc_screenbuf_size / 2;
2155 unsigned short c;
2156 for (; count > 0; count--, cp++) {
2157 c = scr_readw(cp);
2158 scr_writew(((c & 0xfe00) >> 1) |
2159 (c & 0xff), cp);
2160 }
2161 c = vc->vc_video_erase_char;
2162 vc->vc_video_erase_char =
2163 ((c & 0xfe00) >> 1) | (c & 0xff);
2164 vc->vc_attr >>= 1;
2165 }
2166 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2167 vc->vc_hi_font_mask = 0x100;
2168 if (vc->vc_can_do_color) {
2169 vc->vc_complement_mask <<= 1;
2170 vc->vc_s_complement_mask <<= 1;
2171 }
2172
2173 /* ++Edmund: reorder the attribute bits */
2174 {
2175 unsigned short *cp =
2176 (unsigned short *) vc->vc_origin;
2177 int count = vc->vc_screenbuf_size / 2;
2178 unsigned short c;
2179 for (; count > 0; count--, cp++) {
2180 unsigned short newc;
2181 c = scr_readw(cp);
2182 if (vc->vc_can_do_color)
2183 newc =
2184 ((c & 0xff00) << 1) | (c &
2185 0xff);
2186 else
2187 newc = c & ~0x100;
2188 scr_writew(newc, cp);
2189 }
2190 c = vc->vc_video_erase_char;
2191 if (vc->vc_can_do_color) {
2192 vc->vc_video_erase_char =
2193 ((c & 0xff00) << 1) | (c & 0xff);
2194 vc->vc_attr <<= 1;
2195 } else
2196 vc->vc_video_erase_char = c & ~0x100;
2197 }
2198
2199 }
2200
2201 if (resize) {
2202 /* reset wrap/pan */
2203 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2204 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2205 if (CON_IS_VISIBLE(vc) && softback_buf) {
2206 int l = fbcon_softback_size / vc->vc_size_row;
2207 if (l > 5)
2208 softback_end =
2209 softback_buf + l * vc->vc_size_row;
2210 else {
2211 /* Smaller scrollback makes no sense, and 0 would screw
2212 the operation totally */
2213 softback_top = 0;
2214 }
2215 }
2216 } else if (CON_IS_VISIBLE(vc)
2217 && vc->vc_mode == KD_TEXT) {
2218 fbcon_clear_margins(vc, 0);
2219 update_screen(vc);
2220 }
2221
2222 if (old_data && (--REFCOUNT(old_data) == 0))
2223 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2224 return 0;
2225 }
2226
2227 static int fbcon_copy_font(struct vc_data *vc, int con)
2228 {
2229 struct display *od = &fb_display[con];
2230 struct console_font *f = &vc->vc_font;
2231
2232 if (od->fontdata == f->data)
2233 return 0; /* already the same font... */
2234 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2235 }
2236
2237 /*
2238 * User asked to set font; we are guaranteed that
2239 * a) width and height are in range 1..32
2240 * b) charcount does not exceed 512
2241 * but lets not assume that, since someone might someday want to use larger
2242 * fonts. And charcount of 512 is small for unicode support.
2243 *
2244 * However, user space gives the font in 32 rows , regardless of
2245 * actual font height. So a new API is needed if support for larger fonts
2246 * is ever implemented.
2247 */
2248
2249 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2250 {
2251 unsigned charcount = font->charcount;
2252 int w = font->width;
2253 int h = font->height;
2254 int size;
2255 int i, csum;
2256 u8 *new_data, *data = font->data;
2257 int pitch = (font->width+7) >> 3;
2258
2259 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2260 * If not this check should be changed to charcount < 256 */
2261 if (charcount != 256 && charcount != 512)
2262 return -EINVAL;
2263
2264 size = h * pitch * charcount;
2265
2266 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2267
2268 if (!new_data)
2269 return -ENOMEM;
2270
2271 new_data += FONT_EXTRA_WORDS * sizeof(int);
2272 FNTSIZE(new_data) = size;
2273 FNTCHARCNT(new_data) = charcount;
2274 REFCOUNT(new_data) = 0; /* usage counter */
2275 for (i=0; i< charcount; i++) {
2276 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2277 }
2278
2279 /* Since linux has a nice crc32 function use it for counting font
2280 * checksums. */
2281 csum = crc32(0, new_data, size);
2282
2283 FNTSUM(new_data) = csum;
2284 /* Check if the same font is on some other console already */
2285 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2286 struct vc_data *tmp = vc_cons[i].d;
2287
2288 if (fb_display[i].userfont &&
2289 fb_display[i].fontdata &&
2290 FNTSUM(fb_display[i].fontdata) == csum &&
2291 FNTSIZE(fb_display[i].fontdata) == size &&
2292 tmp->vc_font.width == w &&
2293 !memcmp(fb_display[i].fontdata, new_data, size)) {
2294 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2295 new_data = fb_display[i].fontdata;
2296 break;
2297 }
2298 }
2299 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2300 }
2301
2302 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2303 {
2304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2305 struct font_desc *f;
2306
2307 if (!name)
2308 f = get_default_font(info->var.xres, info->var.yres);
2309 else if (!(f = find_font(name)))
2310 return -ENOENT;
2311
2312 font->width = f->width;
2313 font->height = f->height;
2314 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2315 }
2316
2317 static u16 palette_red[16];
2318 static u16 palette_green[16];
2319 static u16 palette_blue[16];
2320
2321 static struct fb_cmap palette_cmap = {
2322 0, 16, palette_red, palette_green, palette_blue, NULL
2323 };
2324
2325 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2326 {
2327 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2328 int i, j, k, depth;
2329 u8 val;
2330
2331 if (fbcon_is_inactive(vc, info))
2332 return -EINVAL;
2333
2334 if (!CON_IS_VISIBLE(vc))
2335 return 0;
2336
2337 depth = fb_get_color_depth(&info->var);
2338 if (depth > 3) {
2339 for (i = j = 0; i < 16; i++) {
2340 k = table[i];
2341 val = vc->vc_palette[j++];
2342 palette_red[k] = (val << 8) | val;
2343 val = vc->vc_palette[j++];
2344 palette_green[k] = (val << 8) | val;
2345 val = vc->vc_palette[j++];
2346 palette_blue[k] = (val << 8) | val;
2347 }
2348 palette_cmap.len = 16;
2349 palette_cmap.start = 0;
2350 /*
2351 * If framebuffer is capable of less than 16 colors,
2352 * use default palette of fbcon.
2353 */
2354 } else
2355 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2356
2357 return fb_set_cmap(&palette_cmap, info);
2358 }
2359
2360 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2361 {
2362 unsigned long p;
2363 int line;
2364
2365 if (vc->vc_num != fg_console || !softback_lines)
2366 return (u16 *) (vc->vc_origin + offset);
2367 line = offset / vc->vc_size_row;
2368 if (line >= softback_lines)
2369 return (u16 *) (vc->vc_origin + offset -
2370 softback_lines * vc->vc_size_row);
2371 p = softback_curr + offset;
2372 if (p >= softback_end)
2373 p += softback_buf - softback_end;
2374 return (u16 *) p;
2375 }
2376
2377 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2378 int *px, int *py)
2379 {
2380 unsigned long ret;
2381 int x, y;
2382
2383 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2384 unsigned long offset = (pos - vc->vc_origin) / 2;
2385
2386 x = offset % vc->vc_cols;
2387 y = offset / vc->vc_cols;
2388 if (vc->vc_num == fg_console)
2389 y += softback_lines;
2390 ret = pos + (vc->vc_cols - x) * 2;
2391 } else if (vc->vc_num == fg_console && softback_lines) {
2392 unsigned long offset = pos - softback_curr;
2393
2394 if (pos < softback_curr)
2395 offset += softback_end - softback_buf;
2396 offset /= 2;
2397 x = offset % vc->vc_cols;
2398 y = offset / vc->vc_cols;
2399 ret = pos + (vc->vc_cols - x) * 2;
2400 if (ret == softback_end)
2401 ret = softback_buf;
2402 if (ret == softback_in)
2403 ret = vc->vc_origin;
2404 } else {
2405 /* Should not happen */
2406 x = y = 0;
2407 ret = vc->vc_origin;
2408 }
2409 if (px)
2410 *px = x;
2411 if (py)
2412 *py = y;
2413 return ret;
2414 }
2415
2416 /* As we might be inside of softback, we may work with non-contiguous buffer,
2417 that's why we have to use a separate routine. */
2418 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2419 {
2420 while (cnt--) {
2421 u16 a = scr_readw(p);
2422 if (!vc->vc_can_do_color)
2423 a ^= 0x0800;
2424 else if (vc->vc_hi_font_mask == 0x100)
2425 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2426 (((a) & 0x0e00) << 4);
2427 else
2428 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2429 (((a) & 0x0700) << 4);
2430 scr_writew(a, p++);
2431 if (p == (u16 *) softback_end)
2432 p = (u16 *) softback_buf;
2433 if (p == (u16 *) softback_in)
2434 p = (u16 *) vc->vc_origin;
2435 }
2436 }
2437
2438 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2439 {
2440 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2441 struct display *p = &fb_display[fg_console];
2442 int offset, limit, scrollback_old;
2443
2444 if (softback_top) {
2445 if (vc->vc_num != fg_console)
2446 return 0;
2447 if (vc->vc_mode != KD_TEXT || !lines)
2448 return 0;
2449 if (logo_shown >= 0) {
2450 struct vc_data *conp2 = vc_cons[logo_shown].d;
2451
2452 if (conp2->vc_top == logo_lines
2453 && conp2->vc_bottom == conp2->vc_rows)
2454 conp2->vc_top = 0;
2455 if (logo_shown == vc->vc_num) {
2456 unsigned long p, q;
2457 int i;
2458
2459 p = softback_in;
2460 q = vc->vc_origin +
2461 logo_lines * vc->vc_size_row;
2462 for (i = 0; i < logo_lines; i++) {
2463 if (p == softback_top)
2464 break;
2465 if (p == softback_buf)
2466 p = softback_end;
2467 p -= vc->vc_size_row;
2468 q -= vc->vc_size_row;
2469 scr_memcpyw((u16 *) q, (u16 *) p,
2470 vc->vc_size_row);
2471 }
2472 softback_in = p;
2473 update_region(vc, vc->vc_origin,
2474 logo_lines * vc->vc_cols);
2475 }
2476 logo_shown = FBCON_LOGO_CANSHOW;
2477 }
2478 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2479 fbcon_redraw_softback(vc, p, lines);
2480 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2481 return 0;
2482 }
2483
2484 if (!scrollback_phys_max)
2485 return -ENOSYS;
2486
2487 scrollback_old = scrollback_current;
2488 scrollback_current -= lines;
2489 if (scrollback_current < 0)
2490 scrollback_current = 0;
2491 else if (scrollback_current > scrollback_max)
2492 scrollback_current = scrollback_max;
2493 if (scrollback_current == scrollback_old)
2494 return 0;
2495
2496 if (fbcon_is_inactive(vc, info))
2497 return 0;
2498
2499 fbcon_cursor(vc, CM_ERASE);
2500
2501 offset = p->yscroll - scrollback_current;
2502 limit = p->vrows;
2503 switch (p->scrollmode) {
2504 case SCROLL_WRAP_MOVE:
2505 info->var.vmode |= FB_VMODE_YWRAP;
2506 break;
2507 case SCROLL_PAN_MOVE:
2508 case SCROLL_PAN_REDRAW:
2509 limit -= vc->vc_rows;
2510 info->var.vmode &= ~FB_VMODE_YWRAP;
2511 break;
2512 }
2513 if (offset < 0)
2514 offset += limit;
2515 else if (offset >= limit)
2516 offset -= limit;
2517 info->var.xoffset = 0;
2518 info->var.yoffset = offset * vc->vc_font.height;
2519 update_var(vc->vc_num, info);
2520 if (!scrollback_current)
2521 fbcon_cursor(vc, CM_DRAW);
2522 return 0;
2523 }
2524
2525 static int fbcon_set_origin(struct vc_data *vc)
2526 {
2527 if (softback_lines)
2528 fbcon_scrolldelta(vc, softback_lines);
2529 return 0;
2530 }
2531
2532 static void fbcon_suspended(struct fb_info *info)
2533 {
2534 struct vc_data *vc = NULL;
2535 struct fbcon_ops *ops = info->fbcon_par;
2536
2537 if (!ops || ops->currcon < 0)
2538 return;
2539 vc = vc_cons[ops->currcon].d;
2540
2541 /* Clear cursor, restore saved data */
2542 fbcon_cursor(vc, CM_ERASE);
2543 }
2544
2545 static void fbcon_resumed(struct fb_info *info)
2546 {
2547 struct vc_data *vc;
2548 struct fbcon_ops *ops = info->fbcon_par;
2549
2550 if (!ops || ops->currcon < 0)
2551 return;
2552 vc = vc_cons[ops->currcon].d;
2553
2554 update_screen(vc);
2555 }
2556
2557 static void fbcon_modechanged(struct fb_info *info)
2558 {
2559 struct fbcon_ops *ops = info->fbcon_par;
2560 struct vc_data *vc;
2561 struct display *p;
2562 int rows, cols;
2563
2564 if (!ops || ops->currcon < 0)
2565 return;
2566 vc = vc_cons[ops->currcon].d;
2567 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2568 return;
2569
2570 p = &fb_display[vc->vc_num];
2571
2572 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2573
2574 if (CON_IS_VISIBLE(vc)) {
2575 var_to_display(p, &info->var, info);
2576 cols = info->var.xres / vc->vc_font.width;
2577 rows = info->var.yres / vc->vc_font.height;
2578 vc_resize(vc, cols, rows);
2579 updatescrollmode(p, info, vc);
2580 scrollback_max = 0;
2581 scrollback_current = 0;
2582 update_var(vc->vc_num, info);
2583 fbcon_set_palette(vc, color_table);
2584 update_screen(vc);
2585 if (softback_buf) {
2586 int l = fbcon_softback_size / vc->vc_size_row;
2587 if (l > 5)
2588 softback_end = softback_buf + l * vc->vc_size_row;
2589 else {
2590 /* Smaller scrollback makes no sense, and 0
2591 would screw the operation totally */
2592 softback_top = 0;
2593 }
2594 }
2595 }
2596 }
2597
2598 static int fbcon_mode_deleted(struct fb_info *info,
2599 struct fb_videomode *mode)
2600 {
2601 struct fb_info *fb_info;
2602 struct display *p;
2603 int i, j, found = 0;
2604
2605 /* before deletion, ensure that mode is not in use */
2606 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2607 j = con2fb_map[i];
2608 if (j == -1)
2609 continue;
2610 fb_info = registered_fb[j];
2611 if (fb_info != info)
2612 continue;
2613 p = &fb_display[i];
2614 if (!p || !p->mode)
2615 continue;
2616 if (fb_mode_is_equal(p->mode, mode)) {
2617 found = 1;
2618 break;
2619 }
2620 }
2621 return found;
2622 }
2623
2624 static int fbcon_fb_registered(int idx)
2625 {
2626 int ret = 0, i;
2627
2628 if (info_idx == -1) {
2629 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2630 if (con2fb_map_boot[i] == idx) {
2631 info_idx = idx;
2632 break;
2633 }
2634 }
2635 if (info_idx != -1)
2636 ret = fbcon_takeover(1);
2637 } else {
2638 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2639 if (con2fb_map_boot[i] == idx)
2640 set_con2fb_map(i, idx, 0);
2641 }
2642 }
2643
2644 return ret;
2645 }
2646
2647 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2648 {
2649 struct fbcon_ops *ops = info->fbcon_par;
2650 struct vc_data *vc;
2651
2652 if (!ops || ops->currcon < 0)
2653 return;
2654
2655 vc = vc_cons[ops->currcon].d;
2656 if (vc->vc_mode != KD_TEXT ||
2657 registered_fb[con2fb_map[ops->currcon]] != info)
2658 return;
2659
2660 if (CON_IS_VISIBLE(vc)) {
2661 if (blank)
2662 do_blank_screen(0);
2663 else
2664 do_unblank_screen(0);
2665 }
2666 ops->blank_state = blank;
2667 }
2668
2669 static void fbcon_new_modelist(struct fb_info *info)
2670 {
2671 int i;
2672 struct vc_data *vc;
2673 struct fb_var_screeninfo var;
2674 struct fb_videomode *mode;
2675
2676 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2677 if (registered_fb[con2fb_map[i]] != info)
2678 continue;
2679 if (!fb_display[i].mode)
2680 continue;
2681 vc = vc_cons[i].d;
2682 display_to_var(&var, &fb_display[i]);
2683 mode = fb_find_nearest_mode(&var, &info->modelist);
2684 fb_videomode_to_var(&var, mode);
2685
2686 if (vc)
2687 fbcon_set_disp(info, &var, vc);
2688 else
2689 fbcon_preset_disp(info, &var, i);
2690
2691 }
2692 }
2693
2694 static int fbcon_event_notify(struct notifier_block *self,
2695 unsigned long action, void *data)
2696 {
2697 struct fb_event *event = data;
2698 struct fb_info *info = event->info;
2699 struct fb_videomode *mode;
2700 struct fb_con2fbmap *con2fb;
2701 int ret = 0;
2702
2703 switch(action) {
2704 case FB_EVENT_SUSPEND:
2705 fbcon_suspended(info);
2706 break;
2707 case FB_EVENT_RESUME:
2708 fbcon_resumed(info);
2709 break;
2710 case FB_EVENT_MODE_CHANGE:
2711 fbcon_modechanged(info);
2712 break;
2713 case FB_EVENT_MODE_DELETE:
2714 mode = event->data;
2715 ret = fbcon_mode_deleted(info, mode);
2716 break;
2717 case FB_EVENT_FB_REGISTERED:
2718 ret = fbcon_fb_registered(info->node);
2719 break;
2720 case FB_EVENT_SET_CONSOLE_MAP:
2721 con2fb = event->data;
2722 ret = set_con2fb_map(con2fb->console - 1,
2723 con2fb->framebuffer, 1);
2724 break;
2725 case FB_EVENT_GET_CONSOLE_MAP:
2726 con2fb = event->data;
2727 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2728 break;
2729 case FB_EVENT_BLANK:
2730 fbcon_fb_blanked(info, *(int *)event->data);
2731 break;
2732 case FB_EVENT_NEW_MODELIST:
2733 fbcon_new_modelist(info);
2734 break;
2735 }
2736
2737 return ret;
2738 }
2739
2740 /*
2741 * The console `switch' structure for the frame buffer based console
2742 */
2743
2744 static const struct consw fb_con = {
2745 .owner = THIS_MODULE,
2746 .con_startup = fbcon_startup,
2747 .con_init = fbcon_init,
2748 .con_deinit = fbcon_deinit,
2749 .con_clear = fbcon_clear,
2750 .con_putc = fbcon_putc,
2751 .con_putcs = fbcon_putcs,
2752 .con_cursor = fbcon_cursor,
2753 .con_scroll = fbcon_scroll,
2754 .con_bmove = fbcon_bmove,
2755 .con_switch = fbcon_switch,
2756 .con_blank = fbcon_blank,
2757 .con_font_set = fbcon_set_font,
2758 .con_font_get = fbcon_get_font,
2759 .con_font_default = fbcon_set_def_font,
2760 .con_font_copy = fbcon_copy_font,
2761 .con_set_palette = fbcon_set_palette,
2762 .con_scrolldelta = fbcon_scrolldelta,
2763 .con_set_origin = fbcon_set_origin,
2764 .con_invert_region = fbcon_invert_region,
2765 .con_screen_pos = fbcon_screen_pos,
2766 .con_getxy = fbcon_getxy,
2767 .con_resize = fbcon_resize,
2768 };
2769
2770 static struct notifier_block fbcon_event_notifier = {
2771 .notifier_call = fbcon_event_notify,
2772 };
2773
2774 static int __init fb_console_init(void)
2775 {
2776 int i;
2777
2778 acquire_console_sem();
2779 fb_register_client(&fbcon_event_notifier);
2780 release_console_sem();
2781
2782 for (i = 0; i < MAX_NR_CONSOLES; i++)
2783 con2fb_map[i] = -1;
2784
2785 if (num_registered_fb) {
2786 for (i = 0; i < FB_MAX; i++) {
2787 if (registered_fb[i] != NULL) {
2788 info_idx = i;
2789 break;
2790 }
2791 }
2792 fbcon_takeover(0);
2793 }
2794
2795 return 0;
2796 }
2797
2798 module_init(fb_console_init);
2799
2800 #ifdef MODULE
2801
2802 static void __exit fb_console_exit(void)
2803 {
2804 acquire_console_sem();
2805 fb_unregister_client(&fbcon_event_notifier);
2806 release_console_sem();
2807 give_up_console(&fb_con);
2808 }
2809
2810 module_exit(fb_console_exit);
2811
2812 #endif
2813
2814 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree