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[PATCH] savagefb: Make mode_option available when compiled as a module
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / console / fbcon.c
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1da177e4
LT		 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
103enum {
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
109struct display fb_display[MAX_NR_CONSOLES];
110static signed char con2fb_map[MAX_NR_CONSOLES];
111static signed char con2fb_map_boot[MAX_NR_CONSOLES];
112static int logo_height;
113static int logo_lines;
114/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116static int logo_shown = FBCON_LOGO_CANSHOW;
117/* Software scrollback */
118static int fbcon_softback_size = 32768;
119static unsigned long softback_buf, softback_curr;
120static unsigned long softback_in;
121static unsigned long softback_top, softback_end;
122static int softback_lines;
123/* console mappings */
124static int first_fb_vc;
125static int last_fb_vc = MAX_NR_CONSOLES - 1;
126static int fbcon_is_default = 1;
127/* font data */
128static char fontname[40];
129
130/* current fb_info */
131static int info_idx = -1;
132
133static 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
139static void fbcon_free_font(struct display *);
140static int fbcon_set_origin(struct vc_data *);
141
142#define CURSOR_DRAW_DELAY (1)
143
144/* # VBL ints between cursor state changes */
1da177e4
LT		 145#define ATARI_CURSOR_BLINK_RATE (42)
146#define MAC_CURSOR_BLINK_RATE (32)
147#define DEFAULT_CURSOR_BLINK_RATE (20)
148
149static 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
157static const char *fbcon_startup(void);
158static void fbcon_init(struct vc_data *vc, int init);
159static void fbcon_deinit(struct vc_data *vc);
160static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166static void fbcon_cursor(struct vc_data *vc, int mode);
167static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171static int fbcon_switch(struct vc_data *vc);
172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176/*
177 * Internal routines
178 */
179static __inline__ int real_y(struct display *p, int ypos);
180static __inline__ void ywrap_up(struct vc_data *vc, int count);
181static __inline__ void ywrap_down(struct vc_data *vc, int count);
182static __inline__ void ypan_up(struct vc_data *vc, int count);
183static __inline__ void ypan_down(struct vc_data *vc, int count);
184static 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);
186static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
187 struct vc_data *vc);
188static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 int unit);
190static 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 */
197static int vbl_detected;
198
199static 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
206static 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
214static inline int get_color(struct vc_data *vc, struct fb_info *info,
215 u16 c, int is_fg)
216{
b8c90945 217 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 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 {
b8c90945
AD		 233 int col = ~(0xfff << (max(info->var.green.length,
234 max(info->var.red.length,
235 info->var.blue.length)))) & 0xff;
236
1da177e4 237 /* 0 or 1 */
b8c90945
AD		 238 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
239 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 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
2cc38ed1
AD		 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.
1da177e4 254 */
2cc38ed1
AD		 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;
1da177e4
LT		 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
284static 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) ||
dbd4f128
MJ		 298 registered_fb[con2fb_map[vc->vc_num]] != info ||
299 vc_cons[ops->currcon].d->vc_deccm != 1)
1da177e4
LT		 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
41359dca 311#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4
LT		 312static int cursor_blink_rate;
313static 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
325static 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#ifndef MODULE
335static int __init fb_console_setup(char *this_opt)
336{
337 char *options;
338 int i, j;
339
340 if (!this_opt || !*this_opt)
341 return 0;
342
343 while ((options = strsep(&this_opt, ",")) != NULL) {
344 if (!strncmp(options, "font:", 5))
345 strcpy(fontname, options + 5);
346
347 if (!strncmp(options, "scrollback:", 11)) {
348 options += 11;
349 if (*options) {
350 fbcon_softback_size = simple_strtoul(options, &options, 0);
351 if (*options == 'k' || *options == 'K') {
352 fbcon_softback_size *= 1024;
353 options++;
354 }
355 if (*options != ',')
356 return 0;
357 options++;
358 } else
359 return 0;
360 }
361
362 if (!strncmp(options, "map:", 4)) {
363 options += 4;
364 if (*options)
365 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
366 if (!options[j])
367 j = 0;
368 con2fb_map_boot[i] =
369 (options[j++]-'0') % FB_MAX;
370 }
371 return 0;
372 }
373
374 if (!strncmp(options, "vc:", 3)) {
375 options += 3;
376 if (*options)
377 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
378 if (first_fb_vc < 0)
379 first_fb_vc = 0;
380 if (*options++ == '-')
381 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
382 fbcon_is_default = 0;
383 }
384 }
385 return 0;
386}
387
388__setup("fbcon=", fb_console_setup);
389#endif
390
391static int search_fb_in_map(int idx)
392{
393 int i, retval = 0;
394
395 for (i = 0; i < MAX_NR_CONSOLES; i++) {
396 if (con2fb_map[i] == idx)
397 retval = 1;
398 }
399 return retval;
400}
401
402static int search_for_mapped_con(void)
403{
404 int i, retval = 0;
405
406 for (i = 0; i < MAX_NR_CONSOLES; i++) {
407 if (con2fb_map[i] != -1)
408 retval = 1;
409 }
410 return retval;
411}
412
413static int fbcon_takeover(int show_logo)
414{
415 int err, i;
416
417 if (!num_registered_fb)
418 return -ENODEV;
419
420 if (!show_logo)
421 logo_shown = FBCON_LOGO_DONTSHOW;
422
423 for (i = first_fb_vc; i <= last_fb_vc; i++)
424 con2fb_map[i] = info_idx;
425
426 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
427 fbcon_is_default);
428 if (err) {
429 for (i = first_fb_vc; i <= last_fb_vc; i++) {
430 con2fb_map[i] = -1;
431 }
432 info_idx = -1;
433 }
434
435 return err;
436}
437
438static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
439 int cols, int rows, int new_cols, int new_rows)
440{
441 /* Need to make room for the logo */
442 int cnt, erase = vc->vc_video_erase_char, step;
443 unsigned short *save = NULL, *r, *q;
444
445 /*
446 * remove underline attribute from erase character
447 * if black and white framebuffer.
448 */
b8c90945 449 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4
LT		 450 erase &= ~0x400;
451 logo_height = fb_prepare_logo(info);
452 logo_lines = (logo_height + vc->vc_font.height - 1) /
453 vc->vc_font.height;
454 q = (unsigned short *) (vc->vc_origin +
455 vc->vc_size_row * rows);
456 step = logo_lines * cols;
457 for (r = q - logo_lines * cols; r < q; r++)
458 if (scr_readw(r) != vc->vc_video_erase_char)
459 break;
460 if (r != q && new_rows >= rows + logo_lines) {
461 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
462 if (save) {
463 int i = cols < new_cols ? cols : new_cols;
464 scr_memsetw(save, erase, logo_lines * new_cols * 2);
465 r = q - step;
466 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
467 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
468 r = q;
469 }
470 }
471 if (r == q) {
472 /* We can scroll screen down */
473 r = q - step - cols;
474 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
475 scr_memcpyw(r + step, r, vc->vc_size_row);
476 r -= cols;
477 }
478 if (!save) {
479 vc->vc_y += logo_lines;
480 vc->vc_pos += logo_lines * vc->vc_size_row;
481 }
482 }
483 scr_memsetw((unsigned short *) vc->vc_origin,
484 erase,
485 vc->vc_size_row * logo_lines);
486
487 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
488 fbcon_clear_margins(vc, 0);
489 update_screen(vc);
490 }
491
492 if (save) {
493 q = (unsigned short *) (vc->vc_origin +
494 vc->vc_size_row *
495 rows);
496 scr_memcpyw(q, save, logo_lines * new_cols * 2);
497 vc->vc_y += logo_lines;
498 vc->vc_pos += logo_lines * vc->vc_size_row;
499 kfree(save);
500 }
501
502 if (logo_lines > vc->vc_bottom) {
503 logo_shown = FBCON_LOGO_CANSHOW;
504 printk(KERN_INFO
505 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
506 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
507 logo_shown = FBCON_LOGO_DRAW;
508 vc->vc_top = logo_lines;
509 }
510}
511
512#ifdef CONFIG_FB_TILEBLITTING
513static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
514 struct display *p)
515{
516 struct fbcon_ops *ops = info->fbcon_par;
517
518 if ((info->flags & FBINFO_MISC_TILEBLITTING))
519 fbcon_set_tileops(vc, info, p, ops);
520 else
521 fbcon_set_bitops(ops);
522}
523#else
524static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
525 struct display *p)
526{
527 struct fbcon_ops *ops = info->fbcon_par;
528
529 info->flags &= ~FBINFO_MISC_TILEBLITTING;
530 fbcon_set_bitops(ops);
531}
532#endif /* CONFIG_MISC_TILEBLITTING */
533
534
535static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
536 int unit, int oldidx)
537{
538 struct fbcon_ops *ops = NULL;
539 int err = 0;
540
541 if (!try_module_get(info->fbops->owner))
542 err = -ENODEV;
543
544 if (!err && info->fbops->fb_open &&
545 info->fbops->fb_open(info, 0))
546 err = -ENODEV;
547
548 if (!err) {
549 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
550 if (!ops)
551 err = -ENOMEM;
552 }
553
554 if (!err) {
555 memset(ops, 0, sizeof(struct fbcon_ops));
556 info->fbcon_par = ops;
557 set_blitting_type(vc, info, NULL);
558 }
559
560 if (err) {
561 con2fb_map[unit] = oldidx;
562 module_put(info->fbops->owner);
563 }
564
565 return err;
566}
567
568static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
569 struct fb_info *newinfo, int unit,
570 int oldidx, int found)
571{
572 struct fbcon_ops *ops = oldinfo->fbcon_par;
573 int err = 0;
574
575 if (oldinfo->fbops->fb_release &&
576 oldinfo->fbops->fb_release(oldinfo, 0)) {
577 con2fb_map[unit] = oldidx;
578 if (!found && newinfo->fbops->fb_release)
579 newinfo->fbops->fb_release(newinfo, 0);
580 if (!found)
581 module_put(newinfo->fbops->owner);
582 err = -ENODEV;
583 }
584
585 if (!err) {
586 if (oldinfo->queue.func == fb_flashcursor)
587 del_timer_sync(&ops->cursor_timer);
588
589 kfree(ops->cursor_state.mask);
590 kfree(ops->cursor_data);
591 kfree(oldinfo->fbcon_par);
592 oldinfo->fbcon_par = NULL;
593 module_put(oldinfo->fbops->owner);
594 }
595
596 return err;
597}
598
599static void con2fb_init_newinfo(struct fb_info *info)
600{
601 if (!info->queue.func || info->queue.func == fb_flashcursor) {
602 struct fbcon_ops *ops = info->fbcon_par;
603
604 if (!info->queue.func)
605 INIT_WORK(&info->queue, fb_flashcursor, info);
606
607 init_timer(&ops->cursor_timer);
608 ops->cursor_timer.function = cursor_timer_handler;
609 ops->cursor_timer.expires = jiffies + HZ / 5;
610 ops->cursor_timer.data = (unsigned long ) info;
611 add_timer(&ops->cursor_timer);
612 }
613}
614
615static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
616 int unit, int show_logo)
617{
618 struct fbcon_ops *ops = info->fbcon_par;
619
620 ops->currcon = fg_console;
621
622 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
623 info->fbops->fb_set_par(info);
624
625 ops->flags |= FBCON_FLAGS_INIT;
626 ops->graphics = 0;
627
628 if (vc)
629 fbcon_set_disp(info, &info->var, vc);
630 else
631 fbcon_preset_disp(info, &info->var, unit);
632
633 if (show_logo) {
634 struct vc_data *fg_vc = vc_cons[fg_console].d;
635 struct fb_info *fg_info =
636 registered_fb[con2fb_map[fg_console]];
637
638 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
639 fg_vc->vc_rows, fg_vc->vc_cols,
640 fg_vc->vc_rows);
641 }
642
643 update_screen(vc_cons[fg_console].d);
644}
645
646/**
647 * set_con2fb_map - map console to frame buffer device
648 * @unit: virtual console number to map
649 * @newidx: frame buffer index to map virtual console to
650 * @user: user request
651 *
652 * Maps a virtual console @unit to a frame buffer device
653 * @newidx.
654 */
655static int set_con2fb_map(int unit, int newidx, int user)
656{
657 struct vc_data *vc = vc_cons[unit].d;
658 int oldidx = con2fb_map[unit];
659 struct fb_info *info = registered_fb[newidx];
660 struct fb_info *oldinfo = NULL;
661 int found, err = 0;
662
663 if (oldidx == newidx)
664 return 0;
665
666 if (!info)
667 err = -EINVAL;
668
669 if (!err && !search_for_mapped_con()) {
670 info_idx = newidx;
671 return fbcon_takeover(0);
672 }
673
674 if (oldidx != -1)
675 oldinfo = registered_fb[oldidx];
676
677 found = search_fb_in_map(newidx);
678
679 acquire_console_sem();
680 con2fb_map[unit] = newidx;
681 if (!err && !found)
682 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
683
684
685 /*
686 * If old fb is not mapped to any of the consoles,
687 * fbcon should release it.
688 */
689 if (!err && oldinfo && !search_fb_in_map(oldidx))
690 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
691 found);
692
693 if (!err) {
694 int show_logo = (fg_console == 0 && !user &&
695 logo_shown != FBCON_LOGO_DONTSHOW);
696
697 if (!found)
698 con2fb_init_newinfo(info);
699 con2fb_map_boot[unit] = newidx;
700 con2fb_init_display(vc, info, unit, show_logo);
701 }
702
703 release_console_sem();
704 return err;
705}
706
707/*
708 * Low Level Operations
709 */
710/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
711static int var_to_display(struct display *disp,
712 struct fb_var_screeninfo *var,
713 struct fb_info *info)
714{
715 disp->xres_virtual = var->xres_virtual;
716 disp->yres_virtual = var->yres_virtual;
717 disp->bits_per_pixel = var->bits_per_pixel;
718 disp->grayscale = var->grayscale;
719 disp->nonstd = var->nonstd;
720 disp->accel_flags = var->accel_flags;
721 disp->height = var->height;
722 disp->width = var->width;
723 disp->red = var->red;
724 disp->green = var->green;
725 disp->blue = var->blue;
726 disp->transp = var->transp;
727 disp->rotate = var->rotate;
728 disp->mode = fb_match_mode(var, &info->modelist);
729 if (disp->mode == NULL)
730 /* This should not happen */
731 return -EINVAL;
732 return 0;
733}
734
735static void display_to_var(struct fb_var_screeninfo *var,
736 struct display *disp)
737{
738 fb_videomode_to_var(var, disp->mode);
739 var->xres_virtual = disp->xres_virtual;
740 var->yres_virtual = disp->yres_virtual;
741 var->bits_per_pixel = disp->bits_per_pixel;
742 var->grayscale = disp->grayscale;
743 var->nonstd = disp->nonstd;
744 var->accel_flags = disp->accel_flags;
745 var->height = disp->height;
746 var->width = disp->width;
747 var->red = disp->red;
748 var->green = disp->green;
749 var->blue = disp->blue;
750 var->transp = disp->transp;
751 var->rotate = disp->rotate;
752}
753
754static const char *fbcon_startup(void)
755{
756 const char *display_desc = "frame buffer device";
757 struct display *p = &fb_display[fg_console];
758 struct vc_data *vc = vc_cons[fg_console].d;
759 struct font_desc *font = NULL;
760 struct module *owner;
761 struct fb_info *info = NULL;
762 struct fbcon_ops *ops;
763 int rows, cols;
764 int irqres;
765
766 irqres = 1;
767 /*
768 * If num_registered_fb is zero, this is a call for the dummy part.
769 * The frame buffer devices weren't initialized yet.
770 */
771 if (!num_registered_fb || info_idx == -1)
772 return display_desc;
773 /*
774 * Instead of blindly using registered_fb[0], we use info_idx, set by
775 * fb_console_init();
776 */
777 info = registered_fb[info_idx];
778 if (!info)
779 return NULL;
780
781 owner = info->fbops->owner;
782 if (!try_module_get(owner))
783 return NULL;
784 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
785 module_put(owner);
786 return NULL;
787 }
788
789 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
790 if (!ops) {
791 module_put(owner);
792 return NULL;
793 }
794
795 memset(ops, 0, sizeof(struct fbcon_ops));
796 ops->currcon = -1;
797 ops->graphics = 1;
798 info->fbcon_par = ops;
799 set_blitting_type(vc, info, NULL);
800
801 if (info->fix.type != FB_TYPE_TEXT) {
802 if (fbcon_softback_size) {
803 if (!softback_buf) {
804 softback_buf =
805 (unsigned long)
806 kmalloc(fbcon_softback_size,
807 GFP_KERNEL);
808 if (!softback_buf) {
809 fbcon_softback_size = 0;
810 softback_top = 0;
811 }
812 }
813 } else {
814 if (softback_buf) {
815 kfree((void *) softback_buf);
816 softback_buf = 0;
817 softback_top = 0;
818 }
819 }
820 if (softback_buf)
821 softback_in = softback_top = softback_curr =
822 softback_buf;
823 softback_lines = 0;
824 }
825
826 /* Setup default font */
827 if (!p->fontdata) {
828 if (!fontname[0] || !(font = find_font(fontname)))
829 font = get_default_font(info->var.xres,
830 info->var.yres);
831 vc->vc_font.width = font->width;
832 vc->vc_font.height = font->height;
833 vc->vc_font.data = p->fontdata = font->data;
834 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
835 }
836
837 cols = info->var.xres / vc->vc_font.width;
838 rows = info->var.yres / vc->vc_font.height;
839 vc_resize(vc, cols, rows);
840
841 DPRINTK("mode: %s\n", info->fix.id);
842 DPRINTK("visual: %d\n", info->fix.visual);
843 DPRINTK("res: %dx%d-%d\n", info->var.xres,
844 info->var.yres,
845 info->var.bits_per_pixel);
846
847#ifdef CONFIG_ATARI
848 if (MACH_IS_ATARI) {
849 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
850 irqres =
851 request_irq(IRQ_AUTO_4, fb_vbl_handler,
852 IRQ_TYPE_PRIO, "framebuffer vbl",
853 info);
854 }
855#endif /* CONFIG_ATARI */
856
857#ifdef CONFIG_MAC
858 /*
859 * On a Macintoy, the VBL interrupt may or may not be active.
860 * As interrupt based cursor is more reliable and race free, we
861 * probe for VBL interrupts.
862 */
863 if (MACH_IS_MAC) {
864 int ct = 0;
865 /*
866 * Probe for VBL: set temp. handler ...
867 */
868 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
869 "framebuffer vbl", info);
870 vbl_detected = 0;
871
872 /*
873 * ... and spin for 20 ms ...
874 */
875 while (!vbl_detected && ++ct < 1000)
876 udelay(20);
877
878 if (ct == 1000)
879 printk
880 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
881
882 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
883
884 if (vbl_detected) {
885 /*
886 * interrupt based cursor ok
887 */
888 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
889 irqres =
890 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
891 "framebuffer vbl", info);
892 } else {
893 /*
894 * VBL not detected: fall through, use timer based cursor
895 */
896 irqres = 1;
897 }
898 }
899#endif /* CONFIG_MAC */
900
1da177e4
LT		 901 /* Initialize the work queue. If the driver provides its
902 * own work queue this means it will use something besides
903 * default timer to flash the cursor. */
904 if (!info->queue.func) {
905 INIT_WORK(&info->queue, fb_flashcursor, info);
906
907 init_timer(&ops->cursor_timer);
908 ops->cursor_timer.function = cursor_timer_handler;
909 ops->cursor_timer.expires = jiffies + HZ / 5;
910 ops->cursor_timer.data = (unsigned long ) info;
911 add_timer(&ops->cursor_timer);
912 }
913 return display_desc;
914}
915
916static 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;
306958e8 924 int cap;
1da177e4
LT		 925
926 if (info_idx == -1 || info == NULL)
927 return;
306958e8
AB		 928
929 cap = info->flags;
930
1da177e4
LT		 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);
b8c90945 953 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 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
1022static 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
1056static __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
1065static 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
1092static 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
1105static 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
1113static 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
1122static 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
1148static int scrollback_phys_max = 0;
1149static int scrollback_max = 0;
1150static int scrollback_current = 0;
1151
1152static 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 */
1162static 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
1178static 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
b8c90945
AD		 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);
1da177e4
LT		 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
1241static __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
1259static __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
1277static __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
1300static __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
1325static __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
1348static __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
1372static 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
1465static 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
1499static 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
1554static 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
1579static 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
1771static 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
1794static 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
1836static __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
1872static 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
1924static int fbcon_switch(struct vc_data *vc)
1925{
1926 struct fb_info *info;
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
1960 /*
1961 * FIXME: If we have multiple fbdev's loaded, we need to
1962 * update all info->currcon. Perhaps, we can place this
1963 * in a centralized structure, but this might break some
1964 * drivers.
1965 *
1966 * info->currcon = vc->vc_num;
1967 */
1968 for (i = 0; i < FB_MAX; i++) {
1969 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1970 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1971
1972 ops->currcon = vc->vc_num;
1973 }
1974 }
1975 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1976 display_to_var(&var, p);
1977 var.activate = FB_ACTIVATE_NOW;
1978
1979 /*
1980 * make sure we don't unnecessarily trip the memcmp()
1981 * in fb_set_var()
1982 */
1983 info->var.activate = var.activate;
1984 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1985 fb_set_var(info, &var);
1986
1987 if (prev_console != -1 &&
1988 registered_fb[con2fb_map[prev_console]] != info &&
1989 info->fbops->fb_set_par)
1990 info->fbops->fb_set_par(info);
1991
1992 set_blitting_type(vc, info, p);
1993 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1994
b8c90945 1995 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1996 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1997 updatescrollmode(p, info, vc);
1998
1999 switch (p->scrollmode) {
2000 case SCROLL_WRAP_MOVE:
2001 scrollback_phys_max = p->vrows - vc->vc_rows;
2002 break;
2003 case SCROLL_PAN_MOVE:
2004 case SCROLL_PAN_REDRAW:
2005 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2006 if (scrollback_phys_max < 0)
2007 scrollback_phys_max = 0;
2008 break;
2009 default:
2010 scrollback_phys_max = 0;
2011 break;
2012 }
2013 scrollback_max = 0;
2014 scrollback_current = 0;
2015
2016 update_var(vc->vc_num, info);
2017 fbcon_set_palette(vc, color_table);
2018 fbcon_clear_margins(vc, 0);
2019
2020 if (logo_shown == FBCON_LOGO_DRAW) {
2021
2022 logo_shown = fg_console;
2023 /* This is protected above by initmem_freed */
2024 fb_show_logo(info);
2025 update_region(vc,
2026 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2027 vc->vc_size_row * (vc->vc_bottom -
2028 vc->vc_top) / 2);
2029 return 0;
2030 }
2031 return 1;
2032}
2033
2034static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2035 int blank)
2036{
2037 if (blank) {
2038 unsigned short charmask = vc->vc_hi_font_mask ?
2039 0x1ff : 0xff;
2040 unsigned short oldc;
2041
2042 oldc = vc->vc_video_erase_char;
2043 vc->vc_video_erase_char &= charmask;
2044 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2045 vc->vc_video_erase_char = oldc;
2046 }
2047}
2048
2049static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2050{
2051 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2052 struct fbcon_ops *ops = info->fbcon_par;
2053
2054 if (mode_switch) {
2055 struct fb_var_screeninfo var = info->var;
2056
2057 ops->graphics = 1;
2058
2059 if (!blank) {
2060 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2061 fb_set_var(info, &var);
2062 ops->graphics = 0;
2063 }
2064 }
2065
2066 if (!fbcon_is_inactive(vc, info)) {
2067 if (ops->blank_state != blank) {
2068 ops->blank_state = blank;
2069 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2070 ops->cursor_flash = (!blank);
2071
2072 if (fb_blank(info, blank))
2073 fbcon_generic_blank(vc, info, blank);
2074 }
2075
2076 if (!blank)
2077 update_screen(vc);
2078 }
2079
2080 return 0;
2081}
2082
2083static void fbcon_free_font(struct display *p)
2084{
2085 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2086 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2087 p->fontdata = NULL;
2088 p->userfont = 0;
2089}
2090
2091static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2092{
2093 u8 *fontdata = vc->vc_font.data;
2094 u8 *data = font->data;
2095 int i, j;
2096
2097 font->width = vc->vc_font.width;
2098 font->height = vc->vc_font.height;
2099 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2100 if (!font->data)
2101 return 0;
2102
2103 if (font->width <= 8) {
2104 j = vc->vc_font.height;
2105 for (i = 0; i < font->charcount; i++) {
2106 memcpy(data, fontdata, j);
2107 memset(data + j, 0, 32 - j);
2108 data += 32;
2109 fontdata += j;
2110 }
2111 } else if (font->width <= 16) {
2112 j = vc->vc_font.height * 2;
2113 for (i = 0; i < font->charcount; i++) {
2114 memcpy(data, fontdata, j);
2115 memset(data + j, 0, 64 - j);
2116 data += 64;
2117 fontdata += j;
2118 }
2119 } else if (font->width <= 24) {
2120 for (i = 0; i < font->charcount; i++) {
2121 for (j = 0; j < vc->vc_font.height; j++) {
2122 *data++ = fontdata[0];
2123 *data++ = fontdata[1];
2124 *data++ = fontdata[2];
2125 fontdata += sizeof(u32);
2126 }
2127 memset(data, 0, 3 * (32 - j));
2128 data += 3 * (32 - j);
2129 }
2130 } else {
2131 j = vc->vc_font.height * 4;
2132 for (i = 0; i < font->charcount; i++) {
2133 memcpy(data, fontdata, j);
2134 memset(data + j, 0, 128 - j);
2135 data += 128;
2136 fontdata += j;
2137 }
2138 }
2139 return 0;
2140}
2141
2142static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2143 u8 * data, int userfont)
2144{
2145 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2146 struct display *p = &fb_display[vc->vc_num];
2147 int resize;
2148 int cnt;
2149 char *old_data = NULL;
2150
2151 if (CON_IS_VISIBLE(vc) && softback_lines)
2152 fbcon_set_origin(vc);
2153
2154 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2155 if (p->userfont)
2156 old_data = vc->vc_font.data;
2157 if (userfont)
2158 cnt = FNTCHARCNT(data);
2159 else
2160 cnt = 256;
2161 vc->vc_font.data = p->fontdata = data;
2162 if ((p->userfont = userfont))
2163 REFCOUNT(data)++;
2164 vc->vc_font.width = w;
2165 vc->vc_font.height = h;
2166 if (vc->vc_hi_font_mask && cnt == 256) {
2167 vc->vc_hi_font_mask = 0;
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 if (vc->vc_can_do_color) {
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 c = scr_readw(cp);
2181 scr_writew(((c & 0xfe00) >> 1) |
2182 (c & 0xff), cp);
2183 }
2184 c = vc->vc_video_erase_char;
2185 vc->vc_video_erase_char =
2186 ((c & 0xfe00) >> 1) | (c & 0xff);
2187 vc->vc_attr >>= 1;
2188 }
2189 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2190 vc->vc_hi_font_mask = 0x100;
2191 if (vc->vc_can_do_color) {
2192 vc->vc_complement_mask <<= 1;
2193 vc->vc_s_complement_mask <<= 1;
2194 }
2195
2196 /* ++Edmund: reorder the attribute bits */
2197 {
2198 unsigned short *cp =
2199 (unsigned short *) vc->vc_origin;
2200 int count = vc->vc_screenbuf_size / 2;
2201 unsigned short c;
2202 for (; count > 0; count--, cp++) {
2203 unsigned short newc;
2204 c = scr_readw(cp);
2205 if (vc->vc_can_do_color)
2206 newc =
2207 ((c & 0xff00) << 1) | (c &
2208 0xff);
2209 else
2210 newc = c & ~0x100;
2211 scr_writew(newc, cp);
2212 }
2213 c = vc->vc_video_erase_char;
2214 if (vc->vc_can_do_color) {
2215 vc->vc_video_erase_char =
2216 ((c & 0xff00) << 1) | (c & 0xff);
2217 vc->vc_attr <<= 1;
2218 } else
2219 vc->vc_video_erase_char = c & ~0x100;
2220 }
2221
2222 }
2223
2224 if (resize) {
2225 /* reset wrap/pan */
2226 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2227 vc_resize(vc, info->var.xres / w, info->var.yres / h);
2228 if (CON_IS_VISIBLE(vc) && softback_buf) {
2229 int l = fbcon_softback_size / vc->vc_size_row;
2230 if (l > 5)
2231 softback_end =
2232 softback_buf + l * vc->vc_size_row;
2233 else {
2234 /* Smaller scrollback makes no sense, and 0 would screw
2235 the operation totally */
2236 softback_top = 0;
2237 }
2238 }
2239 } else if (CON_IS_VISIBLE(vc)
2240 && vc->vc_mode == KD_TEXT) {
2241 fbcon_clear_margins(vc, 0);
2242 update_screen(vc);
2243 }
2244
2245 if (old_data && (--REFCOUNT(old_data) == 0))
2246 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2247 return 0;
2248}
2249
2250static int fbcon_copy_font(struct vc_data *vc, int con)
2251{
2252 struct display *od = &fb_display[con];
2253 struct console_font *f = &vc->vc_font;
2254
2255 if (od->fontdata == f->data)
2256 return 0; /* already the same font... */
2257 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2258}
2259
2260/*
2261 * User asked to set font; we are guaranteed that
2262 * a) width and height are in range 1..32
2263 * b) charcount does not exceed 512
2264 * but lets not assume that, since someone might someday want to use larger
2265 * fonts. And charcount of 512 is small for unicode support.
2266 *
2267 * However, user space gives the font in 32 rows , regardless of
2268 * actual font height. So a new API is needed if support for larger fonts
2269 * is ever implemented.
2270 */
2271
2272static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2273{
2274 unsigned charcount = font->charcount;
2275 int w = font->width;
2276 int h = font->height;
2277 int size;
2278 int i, csum;
2279 u8 *new_data, *data = font->data;
2280 int pitch = (font->width+7) >> 3;
2281
2282 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2283 * If not this check should be changed to charcount < 256 */
2284 if (charcount != 256 && charcount != 512)
2285 return -EINVAL;
2286
2287 size = h * pitch * charcount;
2288
2289 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2290
2291 if (!new_data)
2292 return -ENOMEM;
2293
2294 new_data += FONT_EXTRA_WORDS * sizeof(int);
2295 FNTSIZE(new_data) = size;
2296 FNTCHARCNT(new_data) = charcount;
2297 REFCOUNT(new_data) = 0; /* usage counter */
2298 for (i=0; i< charcount; i++) {
2299 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2300 }
2301
2302 /* Since linux has a nice crc32 function use it for counting font
2303 * checksums. */
2304 csum = crc32(0, new_data, size);
2305
2306 FNTSUM(new_data) = csum;
2307 /* Check if the same font is on some other console already */
2308 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2309 struct vc_data *tmp = vc_cons[i].d;
2310
2311 if (fb_display[i].userfont &&
2312 fb_display[i].fontdata &&
2313 FNTSUM(fb_display[i].fontdata) == csum &&
2314 FNTSIZE(fb_display[i].fontdata) == size &&
2315 tmp->vc_font.width == w &&
2316 !memcmp(fb_display[i].fontdata, new_data, size)) {
2317 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2318 new_data = fb_display[i].fontdata;
2319 break;
2320 }
2321 }
2322 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2323}
2324
2325static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2326{
2327 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2328 struct font_desc *f;
2329
2330 if (!name)
2331 f = get_default_font(info->var.xres, info->var.yres);
2332 else if (!(f = find_font(name)))
2333 return -ENOENT;
2334
2335 font->width = f->width;
2336 font->height = f->height;
2337 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2338}
2339
2340static u16 palette_red[16];
2341static u16 palette_green[16];
2342static u16 palette_blue[16];
2343
2344static struct fb_cmap palette_cmap = {
2345 0, 16, palette_red, palette_green, palette_blue, NULL
2346};
2347
2348static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2349{
2350 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2351 int i, j, k, depth;
2352 u8 val;
2353
2354 if (fbcon_is_inactive(vc, info))
2355 return -EINVAL;
2356
2357 if (!CON_IS_VISIBLE(vc))
2358 return 0;
2359
b8c90945 2360 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2361 if (depth > 3) {
2362 for (i = j = 0; i < 16; i++) {
2363 k = table[i];
2364 val = vc->vc_palette[j++];
2365 palette_red[k] = (val << 8) | val;
2366 val = vc->vc_palette[j++];
2367 palette_green[k] = (val << 8) | val;
2368 val = vc->vc_palette[j++];
2369 palette_blue[k] = (val << 8) | val;
2370 }
2371 palette_cmap.len = 16;
2372 palette_cmap.start = 0;
2373 /*
2374 * If framebuffer is capable of less than 16 colors,
2375 * use default palette of fbcon.
2376 */
2377 } else
2378 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2379
2380 return fb_set_cmap(&palette_cmap, info);
2381}
2382
2383static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2384{
2385 unsigned long p;
2386 int line;
2387
2388 if (vc->vc_num != fg_console || !softback_lines)
2389 return (u16 *) (vc->vc_origin + offset);
2390 line = offset / vc->vc_size_row;
2391 if (line >= softback_lines)
2392 return (u16 *) (vc->vc_origin + offset -
2393 softback_lines * vc->vc_size_row);
2394 p = softback_curr + offset;
2395 if (p >= softback_end)
2396 p += softback_buf - softback_end;
2397 return (u16 *) p;
2398}
2399
2400static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2401 int *px, int *py)
2402{
2403 unsigned long ret;
2404 int x, y;
2405
2406 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2407 unsigned long offset = (pos - vc->vc_origin) / 2;
2408
2409 x = offset % vc->vc_cols;
2410 y = offset / vc->vc_cols;
2411 if (vc->vc_num == fg_console)
2412 y += softback_lines;
2413 ret = pos + (vc->vc_cols - x) * 2;
2414 } else if (vc->vc_num == fg_console && softback_lines) {
2415 unsigned long offset = pos - softback_curr;
2416
2417 if (pos < softback_curr)
2418 offset += softback_end - softback_buf;
2419 offset /= 2;
2420 x = offset % vc->vc_cols;
2421 y = offset / vc->vc_cols;
2422 ret = pos + (vc->vc_cols - x) * 2;
2423 if (ret == softback_end)
2424 ret = softback_buf;
2425 if (ret == softback_in)
2426 ret = vc->vc_origin;
2427 } else {
2428 /* Should not happen */
2429 x = y = 0;
2430 ret = vc->vc_origin;
2431 }
2432 if (px)
2433 *px = x;
2434 if (py)
2435 *py = y;
2436 return ret;
2437}
2438
2439/* As we might be inside of softback, we may work with non-contiguous buffer,
2440 that's why we have to use a separate routine. */
2441static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2442{
2443 while (cnt--) {
2444 u16 a = scr_readw(p);
2445 if (!vc->vc_can_do_color)
2446 a ^= 0x0800;
2447 else if (vc->vc_hi_font_mask == 0x100)
2448 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2449 (((a) & 0x0e00) << 4);
2450 else
2451 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2452 (((a) & 0x0700) << 4);
2453 scr_writew(a, p++);
2454 if (p == (u16 *) softback_end)
2455 p = (u16 *) softback_buf;
2456 if (p == (u16 *) softback_in)
2457 p = (u16 *) vc->vc_origin;
2458 }
2459}
2460
2461static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2462{
2463 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2464 struct display *p = &fb_display[fg_console];
2465 int offset, limit, scrollback_old;
2466
2467 if (softback_top) {
2468 if (vc->vc_num != fg_console)
2469 return 0;
2470 if (vc->vc_mode != KD_TEXT || !lines)
2471 return 0;
2472 if (logo_shown >= 0) {
2473 struct vc_data *conp2 = vc_cons[logo_shown].d;
2474
2475 if (conp2->vc_top == logo_lines
2476 && conp2->vc_bottom == conp2->vc_rows)
2477 conp2->vc_top = 0;
2478 if (logo_shown == vc->vc_num) {
2479 unsigned long p, q;
2480 int i;
2481
2482 p = softback_in;
2483 q = vc->vc_origin +
2484 logo_lines * vc->vc_size_row;
2485 for (i = 0; i < logo_lines; i++) {
2486 if (p == softback_top)
2487 break;
2488 if (p == softback_buf)
2489 p = softback_end;
2490 p -= vc->vc_size_row;
2491 q -= vc->vc_size_row;
2492 scr_memcpyw((u16 *) q, (u16 *) p,
2493 vc->vc_size_row);
2494 }
2495 softback_in = p;
2496 update_region(vc, vc->vc_origin,
2497 logo_lines * vc->vc_cols);
2498 }
2499 logo_shown = FBCON_LOGO_CANSHOW;
2500 }
2501 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2502 fbcon_redraw_softback(vc, p, lines);
2503 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2504 return 0;
2505 }
2506
2507 if (!scrollback_phys_max)
2508 return -ENOSYS;
2509
2510 scrollback_old = scrollback_current;
2511 scrollback_current -= lines;
2512 if (scrollback_current < 0)
2513 scrollback_current = 0;
2514 else if (scrollback_current > scrollback_max)
2515 scrollback_current = scrollback_max;
2516 if (scrollback_current == scrollback_old)
2517 return 0;
2518
2519 if (fbcon_is_inactive(vc, info))
2520 return 0;
2521
2522 fbcon_cursor(vc, CM_ERASE);
2523
2524 offset = p->yscroll - scrollback_current;
2525 limit = p->vrows;
2526 switch (p->scrollmode) {
2527 case SCROLL_WRAP_MOVE:
2528 info->var.vmode |= FB_VMODE_YWRAP;
2529 break;
2530 case SCROLL_PAN_MOVE:
2531 case SCROLL_PAN_REDRAW:
2532 limit -= vc->vc_rows;
2533 info->var.vmode &= ~FB_VMODE_YWRAP;
2534 break;
2535 }
2536 if (offset < 0)
2537 offset += limit;
2538 else if (offset >= limit)
2539 offset -= limit;
2540 info->var.xoffset = 0;
2541 info->var.yoffset = offset * vc->vc_font.height;
2542 update_var(vc->vc_num, info);
2543 if (!scrollback_current)
2544 fbcon_cursor(vc, CM_DRAW);
2545 return 0;
2546}
2547
2548static int fbcon_set_origin(struct vc_data *vc)
2549{
2550 if (softback_lines)
2551 fbcon_scrolldelta(vc, softback_lines);
2552 return 0;
2553}
2554
2555static void fbcon_suspended(struct fb_info *info)
2556{
2557 struct vc_data *vc = NULL;
2558 struct fbcon_ops *ops = info->fbcon_par;
2559
2560 if (!ops || ops->currcon < 0)
2561 return;
2562 vc = vc_cons[ops->currcon].d;
2563
2564 /* Clear cursor, restore saved data */
2565 fbcon_cursor(vc, CM_ERASE);
2566}
2567
2568static void fbcon_resumed(struct fb_info *info)
2569{
2570 struct vc_data *vc;
2571 struct fbcon_ops *ops = info->fbcon_par;
2572
2573 if (!ops || ops->currcon < 0)
2574 return;
2575 vc = vc_cons[ops->currcon].d;
2576
2577 update_screen(vc);
2578}
2579
2580static void fbcon_modechanged(struct fb_info *info)
2581{
2582 struct fbcon_ops *ops = info->fbcon_par;
2583 struct vc_data *vc;
2584 struct display *p;
2585 int rows, cols;
2586
2587 if (!ops || ops->currcon < 0)
2588 return;
2589 vc = vc_cons[ops->currcon].d;
2590 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2591 return;
2592
2593 p = &fb_display[vc->vc_num];
2594
2595 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2596
2597 if (CON_IS_VISIBLE(vc)) {
2598 var_to_display(p, &info->var, info);
2599 cols = info->var.xres / vc->vc_font.width;
2600 rows = info->var.yres / vc->vc_font.height;
2601 vc_resize(vc, cols, rows);
2602 updatescrollmode(p, info, vc);
2603 scrollback_max = 0;
2604 scrollback_current = 0;
2605 update_var(vc->vc_num, info);
2606 fbcon_set_palette(vc, color_table);
2607 update_screen(vc);
2608 if (softback_buf) {
2609 int l = fbcon_softback_size / vc->vc_size_row;
2610 if (l > 5)
2611 softback_end = softback_buf + l * vc->vc_size_row;
2612 else {
2613 /* Smaller scrollback makes no sense, and 0
2614 would screw the operation totally */
2615 softback_top = 0;
2616 }
2617 }
2618 }
2619}
2620
7726e9e1
AD		 2621static void fbcon_set_all_vcs(struct fb_info *info)
2622{
2623 struct fbcon_ops *ops = info->fbcon_par;
2624 struct vc_data *vc;
2625 struct display *p;
2626 int i, rows, cols;
2627
2628 if (!ops || ops->currcon < 0)
2629 return;
2630
2631 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2632 vc = vc_cons[i].d;
2633 if (!vc || vc->vc_mode != KD_TEXT ||
2634 registered_fb[con2fb_map[i]] != info)
2635 continue;
2636
2637 p = &fb_display[vc->vc_num];
2638
2639 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2640 var_to_display(p, &info->var, info);
2641 cols = info->var.xres / vc->vc_font.width;
2642 rows = info->var.yres / vc->vc_font.height;
2643 vc_resize(vc, cols, rows);
2644
2645 if (CON_IS_VISIBLE(vc)) {
2646 updatescrollmode(p, info, vc);
2647 scrollback_max = 0;
2648 scrollback_current = 0;
2649 update_var(vc->vc_num, info);
2650 fbcon_set_palette(vc, color_table);
2651 update_screen(vc);
2652 if (softback_buf) {
2653 int l = fbcon_softback_size / vc->vc_size_row;
2654 if (l > 5)
2655 softback_end = softback_buf + l * vc->vc_size_row;
2656 else {
2657 /* Smaller scrollback makes no sense, and 0
2658 would screw the operation totally */
2659 softback_top = 0;
2660 }
2661 }
2662 }
2663 }
2664}
2665
1da177e4
LT		 2666static int fbcon_mode_deleted(struct fb_info *info,
2667 struct fb_videomode *mode)
2668{
2669 struct fb_info *fb_info;
2670 struct display *p;
2671 int i, j, found = 0;
2672
2673 /* before deletion, ensure that mode is not in use */
2674 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2675 j = con2fb_map[i];
2676 if (j == -1)
2677 continue;
2678 fb_info = registered_fb[j];
2679 if (fb_info != info)
2680 continue;
2681 p = &fb_display[i];
2682 if (!p || !p->mode)
2683 continue;
2684 if (fb_mode_is_equal(p->mode, mode)) {
2685 found = 1;
2686 break;
2687 }
2688 }
2689 return found;
2690}
2691
2692static int fbcon_fb_registered(int idx)
2693{
2694 int ret = 0, i;
2695
2696 if (info_idx == -1) {
2697 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2698 if (con2fb_map_boot[i] == idx) {
2699 info_idx = idx;
2700 break;
2701 }
2702 }
2703 if (info_idx != -1)
2704 ret = fbcon_takeover(1);
2705 } else {
2706 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2707 if (con2fb_map_boot[i] == idx)
2708 set_con2fb_map(i, idx, 0);
2709 }
2710 }
2711
2712 return ret;
2713}
2714
2715static void fbcon_fb_blanked(struct fb_info *info, int blank)
2716{
2717 struct fbcon_ops *ops = info->fbcon_par;
2718 struct vc_data *vc;
2719
2720 if (!ops || ops->currcon < 0)
2721 return;
2722
2723 vc = vc_cons[ops->currcon].d;
2724 if (vc->vc_mode != KD_TEXT ||
2725 registered_fb[con2fb_map[ops->currcon]] != info)
2726 return;
2727
2728 if (CON_IS_VISIBLE(vc)) {
2729 if (blank)
2730 do_blank_screen(0);
2731 else
2732 do_unblank_screen(0);
2733 }
2734 ops->blank_state = blank;
2735}
2736
2737static void fbcon_new_modelist(struct fb_info *info)
2738{
2739 int i;
2740 struct vc_data *vc;
2741 struct fb_var_screeninfo var;
2742 struct fb_videomode *mode;
2743
2744 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2745 if (registered_fb[con2fb_map[i]] != info)
2746 continue;
2747 if (!fb_display[i].mode)
2748 continue;
2749 vc = vc_cons[i].d;
2750 display_to_var(&var, &fb_display[i]);
2751 mode = fb_find_nearest_mode(&var, &info->modelist);
2752 fb_videomode_to_var(&var, mode);
2753
2754 if (vc)
2755 fbcon_set_disp(info, &var, vc);
2756 else
2757 fbcon_preset_disp(info, &var, i);
2758
2759 }
2760}
2761
2762static int fbcon_event_notify(struct notifier_block *self,
2763 unsigned long action, void *data)
2764{
2765 struct fb_event *event = data;
2766 struct fb_info *info = event->info;
2767 struct fb_videomode *mode;
2768 struct fb_con2fbmap *con2fb;
2769 int ret = 0;
2770
2771 switch(action) {
2772 case FB_EVENT_SUSPEND:
2773 fbcon_suspended(info);
2774 break;
2775 case FB_EVENT_RESUME:
2776 fbcon_resumed(info);
2777 break;
2778 case FB_EVENT_MODE_CHANGE:
2779 fbcon_modechanged(info);
2780 break;
7726e9e1
AD		 2781 case FB_EVENT_MODE_CHANGE_ALL:
2782 fbcon_set_all_vcs(info);
2783 break;
1da177e4
LT		 2784 case FB_EVENT_MODE_DELETE:
2785 mode = event->data;
2786 ret = fbcon_mode_deleted(info, mode);
2787 break;
2788 case FB_EVENT_FB_REGISTERED:
2789 ret = fbcon_fb_registered(info->node);
2790 break;
2791 case FB_EVENT_SET_CONSOLE_MAP:
2792 con2fb = event->data;
2793 ret = set_con2fb_map(con2fb->console - 1,
2794 con2fb->framebuffer, 1);
2795 break;
2796 case FB_EVENT_GET_CONSOLE_MAP:
2797 con2fb = event->data;
2798 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2799 break;
2800 case FB_EVENT_BLANK:
2801 fbcon_fb_blanked(info, *(int *)event->data);
2802 break;
2803 case FB_EVENT_NEW_MODELIST:
2804 fbcon_new_modelist(info);
2805 break;
2806 }
2807
2808 return ret;
2809}
2810
2811/*
2812 * The console `switch' structure for the frame buffer based console
2813 */
2814
2815static const struct consw fb_con = {
2816 .owner = THIS_MODULE,
2817 .con_startup = fbcon_startup,
2818 .con_init = fbcon_init,
2819 .con_deinit = fbcon_deinit,
2820 .con_clear = fbcon_clear,
2821 .con_putc = fbcon_putc,
2822 .con_putcs = fbcon_putcs,
2823 .con_cursor = fbcon_cursor,
2824 .con_scroll = fbcon_scroll,
2825 .con_bmove = fbcon_bmove,
2826 .con_switch = fbcon_switch,
2827 .con_blank = fbcon_blank,
2828 .con_font_set = fbcon_set_font,
2829 .con_font_get = fbcon_get_font,
2830 .con_font_default = fbcon_set_def_font,
2831 .con_font_copy = fbcon_copy_font,
2832 .con_set_palette = fbcon_set_palette,
2833 .con_scrolldelta = fbcon_scrolldelta,
2834 .con_set_origin = fbcon_set_origin,
2835 .con_invert_region = fbcon_invert_region,
2836 .con_screen_pos = fbcon_screen_pos,
2837 .con_getxy = fbcon_getxy,
2838 .con_resize = fbcon_resize,
2839};
2840
2841static struct notifier_block fbcon_event_notifier = {
2842 .notifier_call = fbcon_event_notify,
2843};
2844
2845static int __init fb_console_init(void)
2846{
2847 int i;
2848
2849 acquire_console_sem();
2850 fb_register_client(&fbcon_event_notifier);
2851 release_console_sem();
2852
2853 for (i = 0; i < MAX_NR_CONSOLES; i++)
2854 con2fb_map[i] = -1;
2855
2856 if (num_registered_fb) {
2857 for (i = 0; i < FB_MAX; i++) {
2858 if (registered_fb[i] != NULL) {
2859 info_idx = i;
2860 break;
2861 }
2862 }
2863 fbcon_takeover(0);
2864 }
2865
2866 return 0;
2867}
2868
2869module_init(fb_console_init);
2870
2871#ifdef MODULE
2872
2873static void __exit fb_console_exit(void)
2874{
2875 acquire_console_sem();
2876 fb_unregister_client(&fbcon_event_notifier);
2877 release_console_sem();
2878 give_up_console(&fb_con);
2879}
2880
2881module_exit(fb_console_exit);
2882
2883#endif
2884
2885MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)