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SIS USB2VGA Warning fix
[mirror_ubuntu-bionic-kernel.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
1da177e4
LT		 61#include <linux/module.h>
62#include <linux/types.h>
1da177e4
LT		 63#include <linux/fs.h>
64#include <linux/kernel.h>
65#include <linux/delay.h> /* MSch: for IRQ probe */
1da177e4
LT		 66#include <linux/console.h>
67#include <linux/string.h>
68#include <linux/kd.h>
69#include <linux/slab.h>
70#include <linux/fb.h>
71#include <linux/vt_kern.h>
72#include <linux/selection.h>
73#include <linux/font.h>
74#include <linux/smp.h>
75#include <linux/init.h>
76#include <linux/interrupt.h>
77#include <linux/crc32.h> /* For counting font checksums */
78#include <asm/irq.h>
79#include <asm/system.h>
80#include <asm/uaccess.h>
81#ifdef CONFIG_ATARI
82#include <asm/atariints.h>
83#endif
84#ifdef CONFIG_MAC
85#include <asm/macints.h>
86#endif
87#if defined(__mc68000__) || defined(CONFIG_APUS)
88#include <asm/machdep.h>
89#include <asm/setup.h>
90#endif
91
92#include "fbcon.h"
93
94#ifdef FBCONDEBUG
95# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
96#else
97# define DPRINTK(fmt, args...)
98#endif
99
100enum {
101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
104};
105
ab767201 106static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 107
1da177e4
LT		 108static signed char con2fb_map[MAX_NR_CONSOLES];
109static signed char con2fb_map_boot[MAX_NR_CONSOLES];
110static int logo_height;
111static int logo_lines;
112/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
113 enums. */
114static int logo_shown = FBCON_LOGO_CANSHOW;
115/* Software scrollback */
116static int fbcon_softback_size = 32768;
117static unsigned long softback_buf, softback_curr;
118static unsigned long softback_in;
119static unsigned long softback_top, softback_end;
120static int softback_lines;
121/* console mappings */
122static int first_fb_vc;
123static int last_fb_vc = MAX_NR_CONSOLES - 1;
124static int fbcon_is_default = 1;
e614b18d
AD		 125static int fbcon_has_exited;
126
1da177e4
LT		 127/* font data */
128static char fontname[40];
129
130/* current fb_info */
131static int info_idx = -1;
132
e4fc2761
AD		 133/* console rotation */
134static int rotate;
0a727dea 135static int fbcon_has_sysfs;
e4fc2761 136
1da177e4
LT		 137static const struct consw fb_con;
138
139#define CM_SOFTBACK (8)
140
141#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
142
1da177e4
LT		 143static int fbcon_set_origin(struct vc_data *);
144
145#define CURSOR_DRAW_DELAY (1)
146
147/* # VBL ints between cursor state changes */
1da177e4
LT		 148#define ATARI_CURSOR_BLINK_RATE (42)
149#define MAC_CURSOR_BLINK_RATE (32)
150#define DEFAULT_CURSOR_BLINK_RATE (20)
151
152static int vbl_cursor_cnt;
153
154#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
155
156/*
157 * Interface used by the world
158 */
159
160static const char *fbcon_startup(void);
161static void fbcon_init(struct vc_data *vc, int init);
162static void fbcon_deinit(struct vc_data *vc);
163static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
164 int width);
165static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
166static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
167 int count, int ypos, int xpos);
168static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
169static void fbcon_cursor(struct vc_data *vc, int mode);
170static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
171 int count);
172static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
173 int height, int width);
174static int fbcon_switch(struct vc_data *vc);
175static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
176static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
177static int fbcon_scrolldelta(struct vc_data *vc, int lines);
178
179/*
180 * Internal routines
181 */
1da177e4
LT		 182static __inline__ void ywrap_up(struct vc_data *vc, int count);
183static __inline__ void ywrap_down(struct vc_data *vc, int count);
184static __inline__ void ypan_up(struct vc_data *vc, int count);
185static __inline__ void ypan_down(struct vc_data *vc, int count);
186static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
187 int dy, int dx, int height, int width, u_int y_break);
188static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 struct vc_data *vc);
190static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
191 int unit);
192static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
193 int line, int count, int dy);
a812c94b
AD		 194static void fbcon_modechanged(struct fb_info *info);
195static void fbcon_set_all_vcs(struct fb_info *info);
5428b044
AD		 196static void fbcon_start(void);
197static void fbcon_exit(void);
9a179176
AD		 198static struct class_device *fbcon_class_device;
199
1da177e4
LT		 200#ifdef CONFIG_MAC
201/*
202 * On the Macintoy, there may or may not be a working VBL int. We need to probe
203 */
204static int vbl_detected;
205
7d12e780 206static irqreturn_t fb_vbl_detect(int irq, void *dummy)
1da177e4
LT		 207{
208 vbl_detected++;
209 return IRQ_HANDLED;
210}
211#endif
212
dbcbfe1e 213#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 214static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 215{
216 struct fbcon_ops *ops = info->fbcon_par;
217
218 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 219 ops->p->con_rotate < 4)
220 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 221 else
222 ops->rotate = 0;
223}
a812c94b
AD		 224
225static void fbcon_rotate(struct fb_info *info, u32 rotate)
226{
227 struct fbcon_ops *ops= info->fbcon_par;
228 struct fb_info *fb_info;
229
230 if (!ops || ops->currcon == -1)
231 return;
232
233 fb_info = registered_fb[con2fb_map[ops->currcon]];
234
235 if (info == fb_info) {
236 struct display *p = &fb_display[ops->currcon];
237
238 if (rotate < 4)
239 p->con_rotate = rotate;
240 else
241 p->con_rotate = 0;
242
243 fbcon_modechanged(info);
244 }
245}
246
247static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
248{
249 struct fbcon_ops *ops = info->fbcon_par;
250 struct vc_data *vc;
251 struct display *p;
252 int i;
253
254 if (!ops || ops->currcon < 0 || rotate > 3)
255 return;
256
e614b18d 257 for (i = first_fb_vc; i <= last_fb_vc; i++) {
a812c94b
AD		 258 vc = vc_cons[i].d;
259 if (!vc || vc->vc_mode != KD_TEXT ||
260 registered_fb[con2fb_map[i]] != info)
261 continue;
262
263 p = &fb_display[vc->vc_num];
264 p->con_rotate = rotate;
265 }
266
267 fbcon_set_all_vcs(info);
268}
dbcbfe1e 269#else
b73deed3 270static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 271{
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 ops->rotate = FB_ROTATE_UR;
275}
a812c94b
AD		 276
277static void fbcon_rotate(struct fb_info *info, u32 rotate)
278{
279 return;
280}
281
282static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
283{
284 return;
285}
dbcbfe1e 286#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 287
a812c94b
AD		 288static int fbcon_get_rotate(struct fb_info *info)
289{
290 struct fbcon_ops *ops = info->fbcon_par;
291
292 return (ops) ? ops->rotate : 0;
293}
294
1da177e4
LT		 295static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
296{
297 struct fbcon_ops *ops = info->fbcon_par;
298
299 return (info->state != FBINFO_STATE_RUNNING ||
300 vc->vc_mode != KD_TEXT || ops->graphics);
301}
302
303static inline int get_color(struct vc_data *vc, struct fb_info *info,
304 u16 c, int is_fg)
305{
b8c90945 306 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 307 int color = 0;
308
309 if (console_blanked) {
310 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
311
312 c = vc->vc_video_erase_char & charmask;
313 }
314
315 if (depth != 1)
316 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
317 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
318
319 switch (depth) {
320 case 1:
321 {
b8c90945
AD		 322 int col = ~(0xfff << (max(info->var.green.length,
323 max(info->var.red.length,
324 info->var.blue.length)))) & 0xff;
325
1da177e4 326 /* 0 or 1 */
b8c90945
AD		 327 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
328 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 329
330 if (console_blanked)
331 fg = bg;
332
333 color = (is_fg) ? fg : bg;
334 break;
335 }
336 case 2:
337 /*
338 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 339 * is grayscale. However, simply dividing the values by 4
340 * will not work, as colors 1, 2 and 3 will be scaled-down
341 * to zero rendering them invisible. So empirically convert
342 * colors to a sane 4-level grayscale.
1da177e4 343 */
2cc38ed1
AD		 344 switch (color) {
345 case 0:
346 color = 0; /* black */
347 break;
348 case 1 ... 6:
349 color = 2; /* white */
350 break;
351 case 7 ... 8:
352 color = 1; /* gray */
353 break;
354 default:
355 color = 3; /* intense white */
356 break;
357 }
358 break;
1da177e4
LT		 359 case 3:
360 /*
361 * Last 8 entries of default 16-color palette is a more intense
362 * version of the first 8 (i.e., same chrominance, different
363 * luminance).
364 */
365 color &= 7;
366 break;
367 }
368
369
370 return color;
371}
372
4d9c5b6e
AD		 373static void fbcon_update_softback(struct vc_data *vc)
374{
375 int l = fbcon_softback_size / vc->vc_size_row;
376
377 if (l > 5)
378 softback_end = softback_buf + l * vc->vc_size_row;
379 else
380 /* Smaller scrollback makes no sense, and 0 would screw
381 the operation totally */
382 softback_top = 0;
383}
384
c4028958 385static void fb_flashcursor(struct work_struct *work)
1da177e4 386{
c4028958 387 struct fb_info *info = container_of(work, struct fb_info, queue);
1da177e4
LT		 388 struct fbcon_ops *ops = info->fbcon_par;
389 struct display *p;
390 struct vc_data *vc = NULL;
391 int c;
392 int mode;
393
5428b044
AD		 394 acquire_console_sem();
395 if (ops && ops->currcon != -1)
1da177e4
LT		 396 vc = vc_cons[ops->currcon].d;
397
398 if (!vc || !CON_IS_VISIBLE(vc) ||
dbd4f128 399 registered_fb[con2fb_map[vc->vc_num]] != info ||
212f2639 400 vc->vc_deccm != 1) {
5428b044 401 release_console_sem();
1da177e4 402 return;
5428b044
AD		 403 }
404
1da177e4
LT		 405 p = &fb_display[vc->vc_num];
406 c = scr_readw((u16 *) vc->vc_pos);
407 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
408 CM_ERASE : CM_DRAW;
b73deed3 409 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4
LT		 410 get_color(vc, info, c, 0));
411 release_console_sem();
412}
413
41359dca 414#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4 415static int cursor_blink_rate;
7d12e780 416static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
1da177e4
LT		 417{
418 struct fb_info *info = dev_id;
419
420 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
421 schedule_work(&info->queue);
422 vbl_cursor_cnt = cursor_blink_rate;
423 }
424 return IRQ_HANDLED;
425}
426#endif
427
428static void cursor_timer_handler(unsigned long dev_addr)
429{
430 struct fb_info *info = (struct fb_info *) dev_addr;
431 struct fbcon_ops *ops = info->fbcon_par;
432
433 schedule_work(&info->queue);
434 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
435}
436
88fb2c6e
AD		 437static void fbcon_add_cursor_timer(struct fb_info *info)
438{
439 struct fbcon_ops *ops = info->fbcon_par;
440
441 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
442 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
443 if (!info->queue.func)
c4028958 444 INIT_WORK(&info->queue, fb_flashcursor);
88fb2c6e
AD		 445
446 init_timer(&ops->cursor_timer);
447 ops->cursor_timer.function = cursor_timer_handler;
448 ops->cursor_timer.expires = jiffies + HZ / 5;
449 ops->cursor_timer.data = (unsigned long ) info;
450 add_timer(&ops->cursor_timer);
451 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
452 }
453}
454
455static void fbcon_del_cursor_timer(struct fb_info *info)
456{
457 struct fbcon_ops *ops = info->fbcon_par;
458
459 if (info->queue.func == fb_flashcursor &&
460 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
461 del_timer_sync(&ops->cursor_timer);
462 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
463 }
464}
465
1da177e4
LT		 466#ifndef MODULE
467static int __init fb_console_setup(char *this_opt)
468{
469 char *options;
470 int i, j;
471
472 if (!this_opt || !*this_opt)
9b41046c 473 return 1;
1da177e4
LT		 474
475 while ((options = strsep(&this_opt, ",")) != NULL) {
476 if (!strncmp(options, "font:", 5))
477 strcpy(fontname, options + 5);
478
479 if (!strncmp(options, "scrollback:", 11)) {
480 options += 11;
481 if (*options) {
482 fbcon_softback_size = simple_strtoul(options, &options, 0);
483 if (*options == 'k' || *options == 'K') {
484 fbcon_softback_size *= 1024;
485 options++;
486 }
487 if (*options != ',')
9b41046c 488 return 1;
1da177e4
LT		 489 options++;
490 } else
9b41046c 491 return 1;
1da177e4
LT		 492 }
493
494 if (!strncmp(options, "map:", 4)) {
495 options += 4;
496 if (*options)
497 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
498 if (!options[j])
499 j = 0;
500 con2fb_map_boot[i] =
501 (options[j++]-'0') % FB_MAX;
502 }
9b41046c 503 return 1;
1da177e4
LT		 504 }
505
506 if (!strncmp(options, "vc:", 3)) {
507 options += 3;
508 if (*options)
509 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
510 if (first_fb_vc < 0)
511 first_fb_vc = 0;
512 if (*options++ == '-')
513 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
514 fbcon_is_default = 0;
515 }
e4fc2761
AD		 516
517 if (!strncmp(options, "rotate:", 7)) {
518 options += 7;
519 if (*options)
520 rotate = simple_strtoul(options, &options, 0);
521 if (rotate > 3)
522 rotate = 0;
523 }
1da177e4 524 }
9b41046c 525 return 1;
1da177e4
LT		 526}
527
528__setup("fbcon=", fb_console_setup);
529#endif
530
531static int search_fb_in_map(int idx)
532{
533 int i, retval = 0;
534
e614b18d 535 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 536 if (con2fb_map[i] == idx)
537 retval = 1;
538 }
539 return retval;
540}
541
542static int search_for_mapped_con(void)
543{
544 int i, retval = 0;
545
e614b18d 546 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 547 if (con2fb_map[i] != -1)
548 retval = 1;
549 }
550 return retval;
551}
552
553static int fbcon_takeover(int show_logo)
554{
555 int err, i;
556
557 if (!num_registered_fb)
558 return -ENODEV;
559
560 if (!show_logo)
561 logo_shown = FBCON_LOGO_DONTSHOW;
562
563 for (i = first_fb_vc; i <= last_fb_vc; i++)
564 con2fb_map[i] = info_idx;
565
566 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
567 fbcon_is_default);
e614b18d 568
1da177e4
LT		 569 if (err) {
570 for (i = first_fb_vc; i <= last_fb_vc; i++) {
571 con2fb_map[i] = -1;
572 }
573 info_idx = -1;
574 }
575
576 return err;
577}
578
579static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
580 int cols, int rows, int new_cols, int new_rows)
581{
582 /* Need to make room for the logo */
9c44e5f6 583 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 584 int cnt, erase = vc->vc_video_erase_char, step;
585 unsigned short *save = NULL, *r, *q;
586
587 /*
588 * remove underline attribute from erase character
589 * if black and white framebuffer.
590 */
b8c90945 591 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 592 erase &= ~0x400;
9c44e5f6 593 logo_height = fb_prepare_logo(info, ops->rotate);
1da177e4
LT		 594 logo_lines = (logo_height + vc->vc_font.height - 1) /
595 vc->vc_font.height;
596 q = (unsigned short *) (vc->vc_origin +
597 vc->vc_size_row * rows);
598 step = logo_lines * cols;
599 for (r = q - logo_lines * cols; r < q; r++)
600 if (scr_readw(r) != vc->vc_video_erase_char)
601 break;
602 if (r != q && new_rows >= rows + logo_lines) {
603 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
604 if (save) {
605 int i = cols < new_cols ? cols : new_cols;
606 scr_memsetw(save, erase, logo_lines * new_cols * 2);
607 r = q - step;
608 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
609 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
610 r = q;
611 }
612 }
613 if (r == q) {
614 /* We can scroll screen down */
615 r = q - step - cols;
616 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
617 scr_memcpyw(r + step, r, vc->vc_size_row);
618 r -= cols;
619 }
620 if (!save) {
250038f5
GU		 621 int lines;
622 if (vc->vc_y + logo_lines >= rows)
623 lines = rows - vc->vc_y - 1;
624 else
625 lines = logo_lines;
626 vc->vc_y += lines;
627 vc->vc_pos += lines * vc->vc_size_row;
1da177e4
LT		 628 }
629 }
630 scr_memsetw((unsigned short *) vc->vc_origin,
631 erase,
632 vc->vc_size_row * logo_lines);
633
634 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
635 fbcon_clear_margins(vc, 0);
636 update_screen(vc);
637 }
638
639 if (save) {
640 q = (unsigned short *) (vc->vc_origin +
641 vc->vc_size_row *
642 rows);
643 scr_memcpyw(q, save, logo_lines * new_cols * 2);
644 vc->vc_y += logo_lines;
645 vc->vc_pos += logo_lines * vc->vc_size_row;
646 kfree(save);
647 }
648
649 if (logo_lines > vc->vc_bottom) {
650 logo_shown = FBCON_LOGO_CANSHOW;
651 printk(KERN_INFO
652 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
653 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
654 logo_shown = FBCON_LOGO_DRAW;
655 vc->vc_top = logo_lines;
656 }
657}
658
659#ifdef CONFIG_FB_TILEBLITTING
b73deed3 660static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 661{
662 struct fbcon_ops *ops = info->fbcon_par;
663
b73deed3 664 ops->p = &fb_display[vc->vc_num];
ab767201 665
1da177e4 666 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 667 fbcon_set_tileops(vc, info);
e4fc2761 668 else {
b73deed3 669 fbcon_set_rotation(info);
1da177e4 670 fbcon_set_bitops(ops);
e4fc2761 671 }
1da177e4
LT		 672}
673#else
b73deed3 674static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 675{
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 679 ops->p = &fb_display[vc->vc_num];
680 fbcon_set_rotation(info);
1da177e4
LT		 681 fbcon_set_bitops(ops);
682}
683#endif /* CONFIG_MISC_TILEBLITTING */
684
685
686static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
687 int unit, int oldidx)
688{
689 struct fbcon_ops *ops = NULL;
690 int err = 0;
691
692 if (!try_module_get(info->fbops->owner))
693 err = -ENODEV;
694
695 if (!err && info->fbops->fb_open &&
696 info->fbops->fb_open(info, 0))
697 err = -ENODEV;
698
699 if (!err) {
a39bc34e 700 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 701 if (!ops)
702 err = -ENOMEM;
703 }
704
705 if (!err) {
1da177e4 706 info->fbcon_par = ops;
b73deed3 707 set_blitting_type(vc, info);
1da177e4
LT		 708 }
709
710 if (err) {
711 con2fb_map[unit] = oldidx;
712 module_put(info->fbops->owner);
713 }
714
715 return err;
716}
717
718static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
719 struct fb_info *newinfo, int unit,
720 int oldidx, int found)
721{
722 struct fbcon_ops *ops = oldinfo->fbcon_par;
723 int err = 0;
724
725 if (oldinfo->fbops->fb_release &&
726 oldinfo->fbops->fb_release(oldinfo, 0)) {
727 con2fb_map[unit] = oldidx;
728 if (!found && newinfo->fbops->fb_release)
729 newinfo->fbops->fb_release(newinfo, 0);
730 if (!found)
731 module_put(newinfo->fbops->owner);
732 err = -ENODEV;
733 }
734
735 if (!err) {
88fb2c6e 736 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 737 kfree(ops->cursor_state.mask);
738 kfree(ops->cursor_data);
e4fc2761 739 kfree(ops->fontbuffer);
1da177e4
LT		 740 kfree(oldinfo->fbcon_par);
741 oldinfo->fbcon_par = NULL;
742 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 743 /*
744 If oldinfo and newinfo are driving the same hardware,
745 the fb_release() method of oldinfo may attempt to
746 restore the hardware state. This will leave the
747 newinfo in an undefined state. Thus, a call to
748 fb_set_par() may be needed for the newinfo.
749 */
750 if (newinfo->fbops->fb_set_par)
751 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 752 }
753
754 return err;
755}
756
1da177e4
LT		 757static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
758 int unit, int show_logo)
759{
760 struct fbcon_ops *ops = info->fbcon_par;
761
762 ops->currcon = fg_console;
763
764 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
765 info->fbops->fb_set_par(info);
766
767 ops->flags |= FBCON_FLAGS_INIT;
768 ops->graphics = 0;
769
770 if (vc)
771 fbcon_set_disp(info, &info->var, vc);
772 else
773 fbcon_preset_disp(info, &info->var, unit);
774
775 if (show_logo) {
776 struct vc_data *fg_vc = vc_cons[fg_console].d;
777 struct fb_info *fg_info =
778 registered_fb[con2fb_map[fg_console]];
779
780 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
781 fg_vc->vc_rows, fg_vc->vc_cols,
782 fg_vc->vc_rows);
783 }
784
785 update_screen(vc_cons[fg_console].d);
786}
787
788/**
789 * set_con2fb_map - map console to frame buffer device
790 * @unit: virtual console number to map
791 * @newidx: frame buffer index to map virtual console to
792 * @user: user request
793 *
794 * Maps a virtual console @unit to a frame buffer device
795 * @newidx.
796 */
797static int set_con2fb_map(int unit, int newidx, int user)
798{
799 struct vc_data *vc = vc_cons[unit].d;
800 int oldidx = con2fb_map[unit];
801 struct fb_info *info = registered_fb[newidx];
802 struct fb_info *oldinfo = NULL;
803 int found, err = 0;
804
805 if (oldidx == newidx)
806 return 0;
807
e614b18d
AD		 808 if (!info || fbcon_has_exited)
809 return -EINVAL;
1da177e4
LT		 810
811 if (!err && !search_for_mapped_con()) {
812 info_idx = newidx;
813 return fbcon_takeover(0);
814 }
815
816 if (oldidx != -1)
817 oldinfo = registered_fb[oldidx];
818
819 found = search_fb_in_map(newidx);
820
821 acquire_console_sem();
822 con2fb_map[unit] = newidx;
823 if (!err && !found)
824 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
825
826
827 /*
828 * If old fb is not mapped to any of the consoles,
829 * fbcon should release it.
830 */
831 if (!err && oldinfo && !search_fb_in_map(oldidx))
832 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
833 found);
834
835 if (!err) {
836 int show_logo = (fg_console == 0 && !user &&
837 logo_shown != FBCON_LOGO_DONTSHOW);
838
839 if (!found)
88fb2c6e 840 fbcon_add_cursor_timer(info);
1da177e4
LT		 841 con2fb_map_boot[unit] = newidx;
842 con2fb_init_display(vc, info, unit, show_logo);
843 }
844
e614b18d
AD		 845 if (!search_fb_in_map(info_idx))
846 info_idx = newidx;
847
1da177e4
LT		 848 release_console_sem();
849 return err;
850}
851
852/*
853 * Low Level Operations
854 */
855/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
856static int var_to_display(struct display *disp,
857 struct fb_var_screeninfo *var,
858 struct fb_info *info)
859{
860 disp->xres_virtual = var->xres_virtual;
861 disp->yres_virtual = var->yres_virtual;
862 disp->bits_per_pixel = var->bits_per_pixel;
863 disp->grayscale = var->grayscale;
864 disp->nonstd = var->nonstd;
865 disp->accel_flags = var->accel_flags;
866 disp->height = var->height;
867 disp->width = var->width;
868 disp->red = var->red;
869 disp->green = var->green;
870 disp->blue = var->blue;
871 disp->transp = var->transp;
872 disp->rotate = var->rotate;
873 disp->mode = fb_match_mode(var, &info->modelist);
874 if (disp->mode == NULL)
875 /* This should not happen */
876 return -EINVAL;
877 return 0;
878}
879
880static void display_to_var(struct fb_var_screeninfo *var,
881 struct display *disp)
882{
883 fb_videomode_to_var(var, disp->mode);
884 var->xres_virtual = disp->xres_virtual;
885 var->yres_virtual = disp->yres_virtual;
886 var->bits_per_pixel = disp->bits_per_pixel;
887 var->grayscale = disp->grayscale;
888 var->nonstd = disp->nonstd;
889 var->accel_flags = disp->accel_flags;
890 var->height = disp->height;
891 var->width = disp->width;
892 var->red = disp->red;
893 var->green = disp->green;
894 var->blue = disp->blue;
895 var->transp = disp->transp;
896 var->rotate = disp->rotate;
897}
898
899static const char *fbcon_startup(void)
900{
901 const char *display_desc = "frame buffer device";
902 struct display *p = &fb_display[fg_console];
903 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 904 const struct font_desc *font = NULL;
1da177e4
LT		 905 struct module *owner;
906 struct fb_info *info = NULL;
907 struct fbcon_ops *ops;
908 int rows, cols;
909 int irqres;
910
911 irqres = 1;
912 /*
913 * If num_registered_fb is zero, this is a call for the dummy part.
914 * The frame buffer devices weren't initialized yet.
915 */
916 if (!num_registered_fb || info_idx == -1)
917 return display_desc;
918 /*
919 * Instead of blindly using registered_fb[0], we use info_idx, set by
920 * fb_console_init();
921 */
922 info = registered_fb[info_idx];
923 if (!info)
924 return NULL;
925
926 owner = info->fbops->owner;
927 if (!try_module_get(owner))
928 return NULL;
929 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
930 module_put(owner);
931 return NULL;
932 }
933
a39bc34e 934 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 935 if (!ops) {
936 module_put(owner);
937 return NULL;
938 }
939
1da177e4
LT		 940 ops->currcon = -1;
941 ops->graphics = 1;
e4fc2761 942 ops->cur_rotate = -1;
1da177e4 943 info->fbcon_par = ops;
e4fc2761 944 p->con_rotate = rotate;
b73deed3 945 set_blitting_type(vc, info);
1da177e4
LT		 946
947 if (info->fix.type != FB_TYPE_TEXT) {
948 if (fbcon_softback_size) {
949 if (!softback_buf) {
950 softback_buf =
951 (unsigned long)
952 kmalloc(fbcon_softback_size,
953 GFP_KERNEL);
954 if (!softback_buf) {
955 fbcon_softback_size = 0;
956 softback_top = 0;
957 }
958 }
959 } else {
960 if (softback_buf) {
961 kfree((void *) softback_buf);
962 softback_buf = 0;
963 softback_top = 0;
964 }
965 }
966 if (softback_buf)
967 softback_in = softback_top = softback_curr =
968 softback_buf;
969 softback_lines = 0;
970 }
971
972 /* Setup default font */
973 if (!p->fontdata) {
974 if (!fontname[0] || !(font = find_font(fontname)))
975 font = get_default_font(info->var.xres,
976 info->var.yres);
977 vc->vc_font.width = font->width;
978 vc->vc_font.height = font->height;
2f4516db 979 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 980 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
981 }
982
e4fc2761
AD		 983 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
984 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
985 cols /= vc->vc_font.width;
986 rows /= vc->vc_font.height;
1da177e4
LT		 987 vc_resize(vc, cols, rows);
988
989 DPRINTK("mode: %s\n", info->fix.id);
990 DPRINTK("visual: %d\n", info->fix.visual);
991 DPRINTK("res: %dx%d-%d\n", info->var.xres,
992 info->var.yres,
993 info->var.bits_per_pixel);
994
995#ifdef CONFIG_ATARI
996 if (MACH_IS_ATARI) {
997 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
998 irqres =
999 request_irq(IRQ_AUTO_4, fb_vbl_handler,
1000 IRQ_TYPE_PRIO, "framebuffer vbl",
1001 info);
1002 }
1003#endif /* CONFIG_ATARI */
1004
1005#ifdef CONFIG_MAC
1006 /*
1007 * On a Macintoy, the VBL interrupt may or may not be active.
1008 * As interrupt based cursor is more reliable and race free, we
1009 * probe for VBL interrupts.
1010 */
1011 if (MACH_IS_MAC) {
1012 int ct = 0;
1013 /*
1014 * Probe for VBL: set temp. handler ...
1015 */
1016 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1017 "framebuffer vbl", info);
1018 vbl_detected = 0;
1019
1020 /*
1021 * ... and spin for 20 ms ...
1022 */
1023 while (!vbl_detected && ++ct < 1000)
1024 udelay(20);
1025
1026 if (ct == 1000)
1027 printk
1028 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1029
1030 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1031
1032 if (vbl_detected) {
1033 /*
1034 * interrupt based cursor ok
1035 */
1036 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1037 irqres =
1038 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1039 "framebuffer vbl", info);
1040 } else {
1041 /*
1042 * VBL not detected: fall through, use timer based cursor
1043 */
1044 irqres = 1;
1045 }
1046 }
1047#endif /* CONFIG_MAC */
1048
88fb2c6e 1049 fbcon_add_cursor_timer(info);
e614b18d 1050 fbcon_has_exited = 0;
1da177e4
LT		 1051 return display_desc;
1052}
1053
1054static void fbcon_init(struct vc_data *vc, int init)
1055{
1056 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1057 struct fbcon_ops *ops;
1058 struct vc_data **default_mode = vc->vc_display_fg;
1059 struct vc_data *svc = *default_mode;
1060 struct display *t, *p = &fb_display[vc->vc_num];
1061 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 1062 int cap;
1da177e4
LT		 1063
1064 if (info_idx == -1 || info == NULL)
1065 return;
306958e8
AB		 1066
1067 cap = info->flags;
1068
1da177e4
LT		 1069 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1070 (info->fix.type == FB_TYPE_TEXT))
1071 logo = 0;
1072
1da177e4
LT		 1073 if (var_to_display(p, &info->var, info))
1074 return;
1075
1076 /* If we are not the first console on this
1077 fb, copy the font from that console */
e614b18d
AD		 1078 t = &fb_display[fg_console];
1079 if (!p->fontdata) {
1080 if (t->fontdata) {
1081 struct vc_data *fvc = vc_cons[fg_console].d;
1082
1083 vc->vc_font.data = (void *)(p->fontdata =
1084 fvc->vc_font.data);
1085 vc->vc_font.width = fvc->vc_font.width;
1086 vc->vc_font.height = fvc->vc_font.height;
1087 p->userfont = t->userfont;
1088
1089 if (p->userfont)
1090 REFCOUNT(p->fontdata)++;
1091 } else {
1092 const struct font_desc *font = NULL;
1093
1094 if (!fontname[0] || !(font = find_font(fontname)))
1095 font = get_default_font(info->var.xres,
1096 info->var.yres);
1097 vc->vc_font.width = font->width;
1098 vc->vc_font.height = font->height;
1099 vc->vc_font.data = (void *)(p->fontdata = font->data);
1100 vc->vc_font.charcount = 256; /* FIXME Need to
1101 support more fonts */
1102 }
1da177e4 1103 }
e614b18d 1104
1da177e4
LT		 1105 if (p->userfont)
1106 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1107
b8c90945 1108 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1109 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1110 if (charcnt == 256) {
1111 vc->vc_hi_font_mask = 0;
1112 } else {
1113 vc->vc_hi_font_mask = 0x100;
1114 if (vc->vc_can_do_color)
1115 vc->vc_complement_mask <<= 1;
1116 }
1117
1118 if (!*svc->vc_uni_pagedir_loc)
1119 con_set_default_unimap(svc);
1120 if (!*vc->vc_uni_pagedir_loc)
1121 con_copy_unimap(vc, svc);
1122
e4fc2761
AD		 1123 ops = info->fbcon_par;
1124 p->con_rotate = rotate;
b73deed3 1125 set_blitting_type(vc, info);
e4fc2761 1126
1da177e4
LT		 1127 cols = vc->vc_cols;
1128 rows = vc->vc_rows;
e4fc2761
AD		 1129 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1130 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1131 new_cols /= vc->vc_font.width;
1132 new_rows /= vc->vc_font.height;
1da177e4
LT		 1133 vc_resize(vc, new_cols, new_rows);
1134
1da177e4
LT		 1135 /*
1136 * We must always set the mode. The mode of the previous console
1137 * driver could be in the same resolution but we are using different
1138 * hardware so we have to initialize the hardware.
1139 *
1140 * We need to do it in fbcon_init() to prevent screen corruption.
1141 */
d354d9af 1142 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4
LT		 1143 if (info->fbops->fb_set_par &&
1144 !(ops->flags & FBCON_FLAGS_INIT))
1145 info->fbops->fb_set_par(info);
1146 ops->flags |= FBCON_FLAGS_INIT;
1147 }
1148
1149 ops->graphics = 0;
1150
1151 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1152 !(cap & FBINFO_HWACCEL_DISABLED))
1153 p->scrollmode = SCROLL_MOVE;
1154 else /* default to something safe */
1155 p->scrollmode = SCROLL_REDRAW;
1156
1157 /*
1158 * ++guenther: console.c:vc_allocate() relies on initializing
1159 * vc_{cols,rows}, but we must not set those if we are only
1160 * resizing the console.
1161 */
1162 if (!init) {
1163 vc->vc_cols = new_cols;
1164 vc->vc_rows = new_rows;
1165 }
1166
1167 if (logo)
1168 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1169
4d9c5b6e
AD		 1170 if (vc == svc && softback_buf)
1171 fbcon_update_softback(vc);
e4fc2761 1172
b73deed3 1173 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1174 ops->rotate = FB_ROTATE_UR;
b73deed3 1175 set_blitting_type(vc, info);
e4fc2761
AD		 1176 }
1177
1a37d5f5 1178 ops->p = &fb_display[fg_console];
1da177e4
LT		 1179}
1180
e614b18d
AD		 1181static void fbcon_free_font(struct display *p)
1182{
1183 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1184 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1185 p->fontdata = NULL;
1186 p->userfont = 0;
1187}
1188
1da177e4
LT		 1189static void fbcon_deinit(struct vc_data *vc)
1190{
1191 struct display *p = &fb_display[vc->vc_num];
e614b18d
AD		 1192 struct fb_info *info;
1193 struct fbcon_ops *ops;
1194 int idx;
1da177e4 1195
1da177e4 1196 fbcon_free_font(p);
e614b18d
AD		 1197 idx = con2fb_map[vc->vc_num];
1198
1199 if (idx == -1)
1200 goto finished;
1201
1202 info = registered_fb[idx];
1203
1204 if (!info)
1205 goto finished;
1206
1207 ops = info->fbcon_par;
1208
1209 if (!ops)
1210 goto finished;
1211
1212 if (CON_IS_VISIBLE(vc))
1213 fbcon_del_cursor_timer(info);
1214
1215 ops->flags &= ~FBCON_FLAGS_INIT;
1216finished:
1217
1218 if (!con_is_bound(&fb_con))
1219 fbcon_exit();
1220
1221 return;
1da177e4
LT		 1222}
1223
1224/* ====================================================================== */
1225
1226/* fbcon_XXX routines - interface used by the world
1227 *
1228 * This system is now divided into two levels because of complications
1229 * caused by hardware scrolling. Top level functions:
1230 *
1231 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1232 *
1233 * handles y values in range [0, scr_height-1] that correspond to real
1234 * screen positions. y_wrap shift means that first line of bitmap may be
1235 * anywhere on this display. These functions convert lineoffsets to
1236 * bitmap offsets and deal with the wrap-around case by splitting blits.
1237 *
1238 * fbcon_bmove_physical_8() -- These functions fast implementations
1239 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1240 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1241 *
1242 * WARNING:
1243 *
1244 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1245 * Implies should only really hardware scroll in rows. Only reason for
1246 * restriction is simplicity & efficiency at the moment.
1247 */
1248
1da177e4
LT		 1249static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1250 int width)
1251{
1252 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1253 struct fbcon_ops *ops = info->fbcon_par;
1254
1255 struct display *p = &fb_display[vc->vc_num];
1256 u_int y_break;
1257
1258 if (fbcon_is_inactive(vc, info))
1259 return;
1260
1261 if (!height || !width)
1262 return;
1263
1264 /* Split blits that cross physical y_wrap boundary */
1265
1266 y_break = p->vrows - p->yscroll;
1267 if (sy < y_break && sy + height - 1 >= y_break) {
1268 u_int b = y_break - sy;
1269 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1270 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1271 width);
1272 } else
1273 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1274}
1275
1276static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1277 int count, int ypos, int xpos)
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 if (!fbcon_is_inactive(vc, info))
1284 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1285 get_color(vc, info, scr_readw(s), 1),
1286 get_color(vc, info, scr_readw(s), 0));
1287}
1288
1289static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1290{
1291 unsigned short chr;
1292
1293 scr_writew(c, &chr);
1294 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1295}
1296
1297static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1298{
1299 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1300 struct fbcon_ops *ops = info->fbcon_par;
1301
1302 if (!fbcon_is_inactive(vc, info))
1303 ops->clear_margins(vc, info, bottom_only);
1304}
1305
1306static void fbcon_cursor(struct vc_data *vc, int mode)
1307{
1308 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1309 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1310 int y;
1311 int c = scr_readw((u16 *) vc->vc_pos);
1312
1313 if (fbcon_is_inactive(vc, info))
1314 return;
1315
1316 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1317 if (mode & CM_SOFTBACK) {
1318 mode &= ~CM_SOFTBACK;
1319 y = softback_lines;
1320 } else {
1321 if (softback_lines)
1322 fbcon_set_origin(vc);
1323 y = 0;
1324 }
1325
b73deed3 1326 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4
LT		 1327 get_color(vc, info, c, 0));
1328 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1329}
1330
1331static int scrollback_phys_max = 0;
1332static int scrollback_max = 0;
1333static int scrollback_current = 0;
1334
1da177e4
LT		 1335/*
1336 * If no vc is existent yet, just set struct display
1337 */
1338static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1339 int unit)
1340{
1341 struct display *p = &fb_display[unit];
1342 struct display *t = &fb_display[fg_console];
1343
1da177e4
LT		 1344 if (var_to_display(p, var, info))
1345 return;
1346
1347 p->fontdata = t->fontdata;
1348 p->userfont = t->userfont;
1349 if (p->userfont)
1350 REFCOUNT(p->fontdata)++;
1351}
1352
1353static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1354 struct vc_data *vc)
1355{
1356 struct display *p = &fb_display[vc->vc_num], *t;
1357 struct vc_data **default_mode = vc->vc_display_fg;
1358 struct vc_data *svc = *default_mode;
e4fc2761 1359 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1360 int rows, cols, charcnt = 256;
1361
1da177e4
LT		 1362 if (var_to_display(p, var, info))
1363 return;
1364 t = &fb_display[svc->vc_num];
1365 if (!vc->vc_font.data) {
2f4516db 1366 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1367 vc->vc_font.width = (*default_mode)->vc_font.width;
1368 vc->vc_font.height = (*default_mode)->vc_font.height;
1369 p->userfont = t->userfont;
1370 if (p->userfont)
1371 REFCOUNT(p->fontdata)++;
1372 }
1373 if (p->userfont)
1374 charcnt = FNTCHARCNT(p->fontdata);
1375
b8c90945
AD		 1376 var->activate = FB_ACTIVATE_NOW;
1377 info->var.activate = var->activate;
e4fc2761
AD		 1378 var->yoffset = info->var.yoffset;
1379 var->xoffset = info->var.xoffset;
b8c90945 1380 fb_set_var(info, var);
e4fc2761 1381 ops->var = info->var;
b8c90945 1382 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1383 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1384 if (charcnt == 256) {
1385 vc->vc_hi_font_mask = 0;
1386 } else {
1387 vc->vc_hi_font_mask = 0x100;
1388 if (vc->vc_can_do_color)
1389 vc->vc_complement_mask <<= 1;
1390 }
1391
1392 if (!*svc->vc_uni_pagedir_loc)
1393 con_set_default_unimap(svc);
1394 if (!*vc->vc_uni_pagedir_loc)
1395 con_copy_unimap(vc, svc);
1396
e4fc2761
AD		 1397 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1398 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1399 cols /= vc->vc_font.width;
1400 rows /= vc->vc_font.height;
1da177e4 1401 vc_resize(vc, cols, rows);
e4fc2761 1402
1da177e4
LT		 1403 if (CON_IS_VISIBLE(vc)) {
1404 update_screen(vc);
4d9c5b6e
AD		 1405 if (softback_buf)
1406 fbcon_update_softback(vc);
1da177e4
LT		 1407 }
1408}
1409
1410static __inline__ void ywrap_up(struct vc_data *vc, int count)
1411{
1412 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1413 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1414 struct display *p = &fb_display[vc->vc_num];
1415
1416 p->yscroll += count;
1417 if (p->yscroll >= p->vrows) /* Deal with wrap */
1418 p->yscroll -= p->vrows;
e4fc2761
AD		 1419 ops->var.xoffset = 0;
1420 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1421 ops->var.vmode |= FB_VMODE_YWRAP;
1422 ops->update_start(info);
1da177e4
LT		 1423 scrollback_max += count;
1424 if (scrollback_max > scrollback_phys_max)
1425 scrollback_max = scrollback_phys_max;
1426 scrollback_current = 0;
1427}
1428
1429static __inline__ void ywrap_down(struct vc_data *vc, int count)
1430{
1431 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1432 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1433 struct display *p = &fb_display[vc->vc_num];
1434
1435 p->yscroll -= count;
1436 if (p->yscroll < 0) /* Deal with wrap */
1437 p->yscroll += p->vrows;
e4fc2761
AD		 1438 ops->var.xoffset = 0;
1439 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1440 ops->var.vmode |= FB_VMODE_YWRAP;
1441 ops->update_start(info);
1da177e4
LT		 1442 scrollback_max -= count;
1443 if (scrollback_max < 0)
1444 scrollback_max = 0;
1445 scrollback_current = 0;
1446}
1447
1448static __inline__ void ypan_up(struct vc_data *vc, int count)
1449{
1450 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1451 struct display *p = &fb_display[vc->vc_num];
1452 struct fbcon_ops *ops = info->fbcon_par;
1453
1454 p->yscroll += count;
1455 if (p->yscroll > p->vrows - vc->vc_rows) {
1456 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1457 0, 0, 0, vc->vc_rows, vc->vc_cols);
1458 p->yscroll -= p->vrows - vc->vc_rows;
1459 }
e4fc2761
AD		 1460
1461 ops->var.xoffset = 0;
1462 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1463 ops->var.vmode &= ~FB_VMODE_YWRAP;
1464 ops->update_start(info);
1da177e4
LT		 1465 fbcon_clear_margins(vc, 1);
1466 scrollback_max += count;
1467 if (scrollback_max > scrollback_phys_max)
1468 scrollback_max = scrollback_phys_max;
1469 scrollback_current = 0;
1470}
1471
1472static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1473{
1474 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1475 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1476 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1477
1478 p->yscroll += count;
a39bc34e 1479
1da177e4
LT		 1480 if (p->yscroll > p->vrows - vc->vc_rows) {
1481 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1482 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1483 }
e4fc2761
AD		 1484
1485 ops->var.xoffset = 0;
1486 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1487 ops->var.vmode &= ~FB_VMODE_YWRAP;
1488 ops->update_start(info);
1da177e4
LT		 1489 fbcon_clear_margins(vc, 1);
1490 scrollback_max += count;
1491 if (scrollback_max > scrollback_phys_max)
1492 scrollback_max = scrollback_phys_max;
1493 scrollback_current = 0;
1494}
1495
1496static __inline__ void ypan_down(struct vc_data *vc, int count)
1497{
1498 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1499 struct display *p = &fb_display[vc->vc_num];
1500 struct fbcon_ops *ops = info->fbcon_par;
1501
1502 p->yscroll -= count;
1503 if (p->yscroll < 0) {
1504 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1505 0, vc->vc_rows, vc->vc_cols);
1506 p->yscroll += p->vrows - vc->vc_rows;
1507 }
e4fc2761
AD		 1508
1509 ops->var.xoffset = 0;
1510 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1511 ops->var.vmode &= ~FB_VMODE_YWRAP;
1512 ops->update_start(info);
1da177e4
LT		 1513 fbcon_clear_margins(vc, 1);
1514 scrollback_max -= count;
1515 if (scrollback_max < 0)
1516 scrollback_max = 0;
1517 scrollback_current = 0;
1518}
1519
1520static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1521{
1522 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1523 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1524 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1525
1526 p->yscroll -= count;
a39bc34e 1527
1da177e4
LT		 1528 if (p->yscroll < 0) {
1529 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1530 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1531 }
e4fc2761
AD		 1532
1533 ops->var.xoffset = 0;
1534 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1535 ops->var.vmode &= ~FB_VMODE_YWRAP;
1536 ops->update_start(info);
1da177e4
LT		 1537 fbcon_clear_margins(vc, 1);
1538 scrollback_max -= count;
1539 if (scrollback_max < 0)
1540 scrollback_max = 0;
1541 scrollback_current = 0;
1542}
1543
1544static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1545 long delta)
1546{
1547 int count = vc->vc_rows;
1548 unsigned short *d, *s;
1549 unsigned long n;
1550 int line = 0;
1551
1552 d = (u16 *) softback_curr;
1553 if (d == (u16 *) softback_in)
1554 d = (u16 *) vc->vc_origin;
1555 n = softback_curr + delta * vc->vc_size_row;
1556 softback_lines -= delta;
1557 if (delta < 0) {
1558 if (softback_curr < softback_top && n < softback_buf) {
1559 n += softback_end - softback_buf;
1560 if (n < softback_top) {
1561 softback_lines -=
1562 (softback_top - n) / vc->vc_size_row;
1563 n = softback_top;
1564 }
1565 } else if (softback_curr >= softback_top
1566 && n < softback_top) {
1567 softback_lines -=
1568 (softback_top - n) / vc->vc_size_row;
1569 n = softback_top;
1570 }
1571 } else {
1572 if (softback_curr > softback_in && n >= softback_end) {
1573 n += softback_buf - softback_end;
1574 if (n > softback_in) {
1575 n = softback_in;
1576 softback_lines = 0;
1577 }
1578 } else if (softback_curr <= softback_in && n > softback_in) {
1579 n = softback_in;
1580 softback_lines = 0;
1581 }
1582 }
1583 if (n == softback_curr)
1584 return;
1585 softback_curr = n;
1586 s = (u16 *) softback_curr;
1587 if (s == (u16 *) softback_in)
1588 s = (u16 *) vc->vc_origin;
1589 while (count--) {
1590 unsigned short *start;
1591 unsigned short *le;
1592 unsigned short c;
1593 int x = 0;
1594 unsigned short attr = 1;
1595
1596 start = s;
1597 le = advance_row(s, 1);
1598 do {
1599 c = scr_readw(s);
1600 if (attr != (c & 0xff00)) {
1601 attr = c & 0xff00;
1602 if (s > start) {
1603 fbcon_putcs(vc, start, s - start,
1604 line, x);
1605 x += s - start;
1606 start = s;
1607 }
1608 }
1609 if (c == scr_readw(d)) {
1610 if (s > start) {
1611 fbcon_putcs(vc, start, s - start,
1612 line, x);
1613 x += s - start + 1;
1614 start = s + 1;
1615 } else {
1616 x++;
1617 start++;
1618 }
1619 }
1620 s++;
1621 d++;
1622 } while (s < le);
1623 if (s > start)
1624 fbcon_putcs(vc, start, s - start, line, x);
1625 line++;
1626 if (d == (u16 *) softback_end)
1627 d = (u16 *) softback_buf;
1628 if (d == (u16 *) softback_in)
1629 d = (u16 *) vc->vc_origin;
1630 if (s == (u16 *) softback_end)
1631 s = (u16 *) softback_buf;
1632 if (s == (u16 *) softback_in)
1633 s = (u16 *) vc->vc_origin;
1634 }
1635}
1636
1637static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1638 int line, int count, int dy)
1639{
1640 unsigned short *s = (unsigned short *)
1641 (vc->vc_origin + vc->vc_size_row * line);
1642
1643 while (count--) {
1644 unsigned short *start = s;
1645 unsigned short *le = advance_row(s, 1);
1646 unsigned short c;
1647 int x = 0;
1648 unsigned short attr = 1;
1649
1650 do {
1651 c = scr_readw(s);
1652 if (attr != (c & 0xff00)) {
1653 attr = c & 0xff00;
1654 if (s > start) {
1655 fbcon_putcs(vc, start, s - start,
1656 dy, x);
1657 x += s - start;
1658 start = s;
1659 }
1660 }
1661 console_conditional_schedule();
1662 s++;
1663 } while (s < le);
1664 if (s > start)
1665 fbcon_putcs(vc, start, s - start, dy, x);
1666 console_conditional_schedule();
1667 dy++;
1668 }
1669}
1670
1671static void fbcon_redraw(struct vc_data *vc, struct display *p,
1672 int line, int count, int offset)
1673{
1674 unsigned short *d = (unsigned short *)
1675 (vc->vc_origin + vc->vc_size_row * line);
1676 unsigned short *s = d + offset;
1677
1678 while (count--) {
1679 unsigned short *start = s;
1680 unsigned short *le = advance_row(s, 1);
1681 unsigned short c;
1682 int x = 0;
1683 unsigned short attr = 1;
1684
1685 do {
1686 c = scr_readw(s);
1687 if (attr != (c & 0xff00)) {
1688 attr = c & 0xff00;
1689 if (s > start) {
1690 fbcon_putcs(vc, start, s - start,
1691 line, x);
1692 x += s - start;
1693 start = s;
1694 }
1695 }
1696 if (c == scr_readw(d)) {
1697 if (s > start) {
1698 fbcon_putcs(vc, start, s - start,
1699 line, x);
1700 x += s - start + 1;
1701 start = s + 1;
1702 } else {
1703 x++;
1704 start++;
1705 }
1706 }
1707 scr_writew(c, d);
1708 console_conditional_schedule();
1709 s++;
1710 d++;
1711 } while (s < le);
1712 if (s > start)
1713 fbcon_putcs(vc, start, s - start, line, x);
1714 console_conditional_schedule();
1715 if (offset > 0)
1716 line++;
1717 else {
1718 line--;
1719 /* NOTE: We subtract two lines from these pointers */
1720 s -= vc->vc_size_row;
1721 d -= vc->vc_size_row;
1722 }
1723 }
1724}
1725
1726static inline void fbcon_softback_note(struct vc_data *vc, int t,
1727 int count)
1728{
1729 unsigned short *p;
1730
1731 if (vc->vc_num != fg_console)
1732 return;
1733 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1734
1735 while (count) {
1736 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1737 count--;
1738 p = advance_row(p, 1);
1739 softback_in += vc->vc_size_row;
1740 if (softback_in == softback_end)
1741 softback_in = softback_buf;
1742 if (softback_in == softback_top) {
1743 softback_top += vc->vc_size_row;
1744 if (softback_top == softback_end)
1745 softback_top = softback_buf;
1746 }
1747 }
1748 softback_curr = softback_in;
1749}
1750
1751static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1752 int count)
1753{
1754 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1755 struct display *p = &fb_display[vc->vc_num];
1756 struct fbcon_ops *ops = info->fbcon_par;
1757 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1758
1759 if (fbcon_is_inactive(vc, info))
1760 return -EINVAL;
1761
1762 fbcon_cursor(vc, CM_ERASE);
1763
1764 /*
1765 * ++Geert: Only use ywrap/ypan if the console is in text mode
1766 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1767 * whole screen (prevents flicker).
1768 */
1769
1770 switch (dir) {
1771 case SM_UP:
1772 if (count > vc->vc_rows) /* Maximum realistic size */
1773 count = vc->vc_rows;
1774 if (softback_top)
1775 fbcon_softback_note(vc, t, count);
1776 if (logo_shown >= 0)
1777 goto redraw_up;
1778 switch (p->scrollmode) {
1779 case SCROLL_MOVE:
1780 ops->bmove(vc, info, t + count, 0, t, 0,
1781 b - t - count, vc->vc_cols);
1782 ops->clear(vc, info, b - count, 0, count,
1783 vc->vc_cols);
1784 break;
1785
1786 case SCROLL_WRAP_MOVE:
1787 if (b - t - count > 3 * vc->vc_rows >> 2) {
1788 if (t > 0)
1789 fbcon_bmove(vc, 0, 0, count, 0, t,
1790 vc->vc_cols);
1791 ywrap_up(vc, count);
1792 if (vc->vc_rows - b > 0)
1793 fbcon_bmove(vc, b - count, 0, b, 0,
1794 vc->vc_rows - b,
1795 vc->vc_cols);
1796 } else if (info->flags & FBINFO_READS_FAST)
1797 fbcon_bmove(vc, t + count, 0, t, 0,
1798 b - t - count, vc->vc_cols);
1799 else
1800 goto redraw_up;
1801 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1802 break;
1803
1804 case SCROLL_PAN_REDRAW:
1805 if ((p->yscroll + count <=
1806 2 * (p->vrows - vc->vc_rows))
1807 && ((!scroll_partial && (b - t == vc->vc_rows))
1808 || (scroll_partial
1809 && (b - t - count >
1810 3 * vc->vc_rows >> 2)))) {
1811 if (t > 0)
1812 fbcon_redraw_move(vc, p, 0, t, count);
1813 ypan_up_redraw(vc, t, count);
1814 if (vc->vc_rows - b > 0)
26e780e8 1815 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1816 vc->vc_rows - b, b);
1817 } else
1818 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1819 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1820 break;
1821
1822 case SCROLL_PAN_MOVE:
1823 if ((p->yscroll + count <=
1824 2 * (p->vrows - vc->vc_rows))
1825 && ((!scroll_partial && (b - t == vc->vc_rows))
1826 || (scroll_partial
1827 && (b - t - count >
1828 3 * vc->vc_rows >> 2)))) {
1829 if (t > 0)
1830 fbcon_bmove(vc, 0, 0, count, 0, t,
1831 vc->vc_cols);
1832 ypan_up(vc, count);
1833 if (vc->vc_rows - b > 0)
1834 fbcon_bmove(vc, b - count, 0, b, 0,
1835 vc->vc_rows - b,
1836 vc->vc_cols);
1837 } else if (info->flags & FBINFO_READS_FAST)
1838 fbcon_bmove(vc, t + count, 0, t, 0,
1839 b - t - count, vc->vc_cols);
1840 else
1841 goto redraw_up;
1842 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1843 break;
1844
1845 case SCROLL_REDRAW:
1846 redraw_up:
1847 fbcon_redraw(vc, p, t, b - t - count,
1848 count * vc->vc_cols);
1849 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1850 scr_memsetw((unsigned short *) (vc->vc_origin +
1851 vc->vc_size_row *
1852 (b - count)),
1853 vc->vc_video_erase_char,
1854 vc->vc_size_row * count);
1855 return 1;
1856 }
1857 break;
1858
1859 case SM_DOWN:
1860 if (count > vc->vc_rows) /* Maximum realistic size */
1861 count = vc->vc_rows;
e703ecc3
JB		 1862 if (logo_shown >= 0)
1863 goto redraw_down;
1da177e4
LT		 1864 switch (p->scrollmode) {
1865 case SCROLL_MOVE:
1866 ops->bmove(vc, info, t, 0, t + count, 0,
1867 b - t - count, vc->vc_cols);
1868 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1869 break;
1870
1871 case SCROLL_WRAP_MOVE:
1872 if (b - t - count > 3 * vc->vc_rows >> 2) {
1873 if (vc->vc_rows - b > 0)
1874 fbcon_bmove(vc, b, 0, b - count, 0,
1875 vc->vc_rows - b,
1876 vc->vc_cols);
1877 ywrap_down(vc, count);
1878 if (t > 0)
1879 fbcon_bmove(vc, count, 0, 0, 0, t,
1880 vc->vc_cols);
1881 } else if (info->flags & FBINFO_READS_FAST)
1882 fbcon_bmove(vc, t, 0, t + count, 0,
1883 b - t - count, vc->vc_cols);
1884 else
1885 goto redraw_down;
1886 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1887 break;
1888
1889 case SCROLL_PAN_MOVE:
1890 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1891 && ((!scroll_partial && (b - t == vc->vc_rows))
1892 || (scroll_partial
1893 && (b - t - count >
1894 3 * vc->vc_rows >> 2)))) {
1895 if (vc->vc_rows - b > 0)
1896 fbcon_bmove(vc, b, 0, b - count, 0,
1897 vc->vc_rows - b,
1898 vc->vc_cols);
1899 ypan_down(vc, count);
1900 if (t > 0)
1901 fbcon_bmove(vc, count, 0, 0, 0, t,
1902 vc->vc_cols);
1903 } else if (info->flags & FBINFO_READS_FAST)
1904 fbcon_bmove(vc, t, 0, t + count, 0,
1905 b - t - count, vc->vc_cols);
1906 else
1907 goto redraw_down;
1908 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1909 break;
1910
1911 case SCROLL_PAN_REDRAW:
1912 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1913 && ((!scroll_partial && (b - t == vc->vc_rows))
1914 || (scroll_partial
1915 && (b - t - count >
1916 3 * vc->vc_rows >> 2)))) {
1917 if (vc->vc_rows - b > 0)
1918 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1919 b - count);
1920 ypan_down_redraw(vc, t, count);
1921 if (t > 0)
1922 fbcon_redraw_move(vc, p, count, t, 0);
1923 } else
1924 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1925 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1926 break;
1927
1928 case SCROLL_REDRAW:
1929 redraw_down:
1930 fbcon_redraw(vc, p, b - 1, b - t - count,
1931 -count * vc->vc_cols);
1932 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1933 scr_memsetw((unsigned short *) (vc->vc_origin +
1934 vc->vc_size_row *
1935 t),
1936 vc->vc_video_erase_char,
1937 vc->vc_size_row * count);
1938 return 1;
1939 }
1940 }
1941 return 0;
1942}
1943
1944
1945static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1946 int height, int width)
1947{
1948 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1949 struct display *p = &fb_display[vc->vc_num];
1950
1951 if (fbcon_is_inactive(vc, info))
1952 return;
1953
1954 if (!width || !height)
1955 return;
1956
1957 /* Split blits that cross physical y_wrap case.
1958 * Pathological case involves 4 blits, better to use recursive
1959 * code rather than unrolled case
1960 *
1961 * Recursive invocations don't need to erase the cursor over and
1962 * over again, so we use fbcon_bmove_rec()
1963 */
1964 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1965 p->vrows - p->yscroll);
1966}
1967
1968static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1969 int dy, int dx, int height, int width, u_int y_break)
1970{
1971 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1972 struct fbcon_ops *ops = info->fbcon_par;
1973 u_int b;
1974
1975 if (sy < y_break && sy + height > y_break) {
1976 b = y_break - sy;
1977 if (dy < sy) { /* Avoid trashing self */
1978 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1979 y_break);
1980 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1981 height - b, width, y_break);
1982 } else {
1983 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1984 height - b, width, y_break);
1985 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1986 y_break);
1987 }
1988 return;
1989 }
1990
1991 if (dy < y_break && dy + height > y_break) {
1992 b = y_break - dy;
1993 if (dy < sy) { /* Avoid trashing self */
1994 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1995 y_break);
1996 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1997 height - b, width, y_break);
1998 } else {
1999 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2000 height - b, width, y_break);
2001 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2002 y_break);
2003 }
2004 return;
2005 }
2006 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2007 height, width);
2008}
2009
e4fc2761
AD		 2010static __inline__ void updatescrollmode(struct display *p,
2011 struct fb_info *info,
1da177e4
LT		 2012 struct vc_data *vc)
2013{
e4fc2761 2014 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2015 int fh = vc->vc_font.height;
2016 int cap = info->flags;
e4fc2761
AD		 2017 u16 t = 0;
2018 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2019 info->fix.xpanstep);
2020 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2021 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2022 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2023 info->var.xres_virtual);
2024 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2025 divides(ypan, vc->vc_font.height) && vyres > yres;
2026 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2027 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 2028 divides(vc->vc_font.height, vyres) &&
2029 divides(vc->vc_font.height, yres);
1da177e4 2030 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 2031 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2032 !(cap & FBINFO_HWACCEL_DISABLED);
2033 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2034 !(cap & FBINFO_HWACCEL_DISABLED);
2035
2036 p->vrows = vyres/fh;
2037 if (yres > (fh * (vc->vc_rows + 1)))
2038 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2039 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 2040 p->vrows--;
2041
2042 if (good_wrap || good_pan) {
2043 if (reading_fast || fast_copyarea)
e4fc2761
AD		 2044 p->scrollmode = good_wrap ?
2045 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 2046 else
2047 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2048 SCROLL_PAN_REDRAW;
2049 } else {
2050 if (reading_fast || (fast_copyarea && !fast_imageblit))
2051 p->scrollmode = SCROLL_MOVE;
2052 else
2053 p->scrollmode = SCROLL_REDRAW;
2054 }
2055}
2056
2057static int fbcon_resize(struct vc_data *vc, unsigned int width,
2058 unsigned int height)
2059{
2060 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2061 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2062 struct display *p = &fb_display[vc->vc_num];
2063 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2064 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2065
2066 virt_w = FBCON_SWAP(ops->rotate, width, height);
2067 virt_h = FBCON_SWAP(ops->rotate, height, width);
2068 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2069 vc->vc_font.height);
2070 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2071 vc->vc_font.width);
2072 var.xres = virt_w * virt_fw;
2073 var.yres = virt_h * virt_fh;
1da177e4
LT		 2074 x_diff = info->var.xres - var.xres;
2075 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2076 if (x_diff < 0 || x_diff > virt_fw ||
2077 y_diff < 0 || y_diff > virt_fh) {
9791d763 2078 const struct fb_videomode *mode;
1da177e4
LT		 2079
2080 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2081 mode = fb_find_best_mode(&var, &info->modelist);
2082 if (mode == NULL)
2083 return -EINVAL;
3084a895 2084 display_to_var(&var, p);
1da177e4 2085 fb_videomode_to_var(&var, mode);
3084a895 2086
e4fc2761 2087 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2088 return -EINVAL;
1da177e4
LT		 2089
2090 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2091 if (CON_IS_VISIBLE(vc)) {
2092 var.activate = FB_ACTIVATE_NOW |
2093 FB_ACTIVATE_FORCE;
2094 fb_set_var(info, &var);
2095 }
2096 var_to_display(p, &info->var, info);
e4fc2761 2097 ops->var = info->var;
1da177e4
LT		 2098 }
2099 updatescrollmode(p, info, vc);
2100 return 0;
2101}
2102
2103static int fbcon_switch(struct vc_data *vc)
2104{
88fb2c6e 2105 struct fb_info *info, *old_info = NULL;
e4fc2761 2106 struct fbcon_ops *ops;
1da177e4
LT		 2107 struct display *p = &fb_display[vc->vc_num];
2108 struct fb_var_screeninfo var;
56f0d64d 2109 int i, prev_console, charcnt = 256;
1da177e4
LT		 2110
2111 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2112 ops = info->fbcon_par;
1da177e4
LT		 2113
2114 if (softback_top) {
1da177e4
LT		 2115 if (softback_lines)
2116 fbcon_set_origin(vc);
2117 softback_top = softback_curr = softback_in = softback_buf;
2118 softback_lines = 0;
4d9c5b6e 2119 fbcon_update_softback(vc);
1da177e4
LT		 2120 }
2121
2122 if (logo_shown >= 0) {
2123 struct vc_data *conp2 = vc_cons[logo_shown].d;
2124
2125 if (conp2->vc_top == logo_lines
2126 && conp2->vc_bottom == conp2->vc_rows)
2127 conp2->vc_top = 0;
2128 logo_shown = FBCON_LOGO_CANSHOW;
2129 }
2130
e4fc2761 2131 prev_console = ops->currcon;
88fb2c6e
AD		 2132 if (prev_console != -1)
2133 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2134 /*
2135 * FIXME: If we have multiple fbdev's loaded, we need to
2136 * update all info->currcon. Perhaps, we can place this
2137 * in a centralized structure, but this might break some
2138 * drivers.
2139 *
2140 * info->currcon = vc->vc_num;
2141 */
2142 for (i = 0; i < FB_MAX; i++) {
2143 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2144 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2145
e4fc2761 2146 o->currcon = vc->vc_num;
1da177e4
LT		 2147 }
2148 }
2149 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2150 display_to_var(&var, p);
2151 var.activate = FB_ACTIVATE_NOW;
2152
2153 /*
2154 * make sure we don't unnecessarily trip the memcmp()
2155 * in fb_set_var()
2156 */
2157 info->var.activate = var.activate;
e4fc2761
AD		 2158 var.yoffset = info->var.yoffset;
2159 var.xoffset = info->var.xoffset;
2160 var.vmode = info->var.vmode;
1da177e4 2161 fb_set_var(info, &var);
e4fc2761 2162 ops->var = info->var;
1da177e4 2163
39942fd8
KP		 2164 if (old_info != NULL && (old_info != info ||
2165 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
88fb2c6e
AD		 2166 if (info->fbops->fb_set_par)
2167 info->fbops->fb_set_par(info);
a39bc34e 2168
5428b044 2169 if (old_info != info)
a39bc34e 2170 fbcon_del_cursor_timer(old_info);
88fb2c6e 2171 }
1da177e4 2172
212f2639
AD		 2173 if (fbcon_is_inactive(vc, info) ||
2174 ops->blank_state != FB_BLANK_UNBLANK)
2175 fbcon_del_cursor_timer(info);
2176 else
2177 fbcon_add_cursor_timer(info);
2178
b73deed3 2179 set_blitting_type(vc, info);
e4fc2761
AD		 2180 ops->cursor_reset = 1;
2181
b73deed3 2182 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2183 ops->rotate = FB_ROTATE_UR;
b73deed3 2184 set_blitting_type(vc, info);
e4fc2761 2185 }
1da177e4 2186
b8c90945 2187 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2188 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2189
2190 if (p->userfont)
2191 charcnt = FNTCHARCNT(vc->vc_font.data);
2192
2193 if (charcnt > 256)
2194 vc->vc_complement_mask <<= 1;
2195
1da177e4
LT		 2196 updatescrollmode(p, info, vc);
2197
2198 switch (p->scrollmode) {
2199 case SCROLL_WRAP_MOVE:
2200 scrollback_phys_max = p->vrows - vc->vc_rows;
2201 break;
2202 case SCROLL_PAN_MOVE:
2203 case SCROLL_PAN_REDRAW:
2204 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2205 if (scrollback_phys_max < 0)
2206 scrollback_phys_max = 0;
2207 break;
2208 default:
2209 scrollback_phys_max = 0;
2210 break;
2211 }
e4fc2761 2212
1da177e4
LT		 2213 scrollback_max = 0;
2214 scrollback_current = 0;
4e1567d3
AD		 2215
2216 if (!fbcon_is_inactive(vc, info)) {
2217 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2218 ops->update_start(info);
2219 }
2220
1da177e4
LT		 2221 fbcon_set_palette(vc, color_table);
2222 fbcon_clear_margins(vc, 0);
2223
2224 if (logo_shown == FBCON_LOGO_DRAW) {
2225
2226 logo_shown = fg_console;
2227 /* This is protected above by initmem_freed */
9c44e5f6 2228 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2229 update_region(vc,
2230 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2231 vc->vc_size_row * (vc->vc_bottom -
2232 vc->vc_top) / 2);
2233 return 0;
2234 }
2235 return 1;
2236}
2237
2238static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2239 int blank)
2240{
994efacd
RP		 2241 struct fb_event event;
2242
1da177e4
LT		 2243 if (blank) {
2244 unsigned short charmask = vc->vc_hi_font_mask ?
2245 0x1ff : 0xff;
2246 unsigned short oldc;
2247
2248 oldc = vc->vc_video_erase_char;
2249 vc->vc_video_erase_char &= charmask;
2250 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2251 vc->vc_video_erase_char = oldc;
2252 }
994efacd
RP		 2253
2254
2255 event.info = info;
2256 event.data = &blank;
2257 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
1da177e4
LT		 2258}
2259
2260static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2261{
2262 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2263 struct fbcon_ops *ops = info->fbcon_par;
2264
2265 if (mode_switch) {
2266 struct fb_var_screeninfo var = info->var;
2267
2268 ops->graphics = 1;
2269
2270 if (!blank) {
47434847
AD		 2271 if (info->fbops->fb_save_state)
2272 info->fbops->fb_save_state(info);
1da177e4
LT		 2273 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2274 fb_set_var(info, &var);
2275 ops->graphics = 0;
e4fc2761 2276 ops->var = info->var;
47434847
AD		 2277 } else if (info->fbops->fb_restore_state)
2278 info->fbops->fb_restore_state(info);
1da177e4
LT		 2279 }
2280
2281 if (!fbcon_is_inactive(vc, info)) {
2282 if (ops->blank_state != blank) {
2283 ops->blank_state = blank;
2284 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2285 ops->cursor_flash = (!blank);
2286
2287 if (fb_blank(info, blank))
2288 fbcon_generic_blank(vc, info, blank);
2289 }
2290
88fb2c6e
AD		 2291 if (!blank)
2292 update_screen(vc);
2293 }
2294
212f2639
AD		 2295 if (fbcon_is_inactive(vc, info) ||
2296 ops->blank_state != FB_BLANK_UNBLANK)
88fb2c6e 2297 fbcon_del_cursor_timer(info);
212f2639
AD		 2298 else
2299 fbcon_add_cursor_timer(info);
1da177e4 2300
88fb2c6e 2301 return 0;
1da177e4
LT		 2302}
2303
1da177e4
LT		 2304static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2305{
2306 u8 *fontdata = vc->vc_font.data;
2307 u8 *data = font->data;
2308 int i, j;
2309
2310 font->width = vc->vc_font.width;
2311 font->height = vc->vc_font.height;
2312 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2313 if (!font->data)
2314 return 0;
2315
2316 if (font->width <= 8) {
2317 j = vc->vc_font.height;
2318 for (i = 0; i < font->charcount; i++) {
2319 memcpy(data, fontdata, j);
2320 memset(data + j, 0, 32 - j);
2321 data += 32;
2322 fontdata += j;
2323 }
2324 } else if (font->width <= 16) {
2325 j = vc->vc_font.height * 2;
2326 for (i = 0; i < font->charcount; i++) {
2327 memcpy(data, fontdata, j);
2328 memset(data + j, 0, 64 - j);
2329 data += 64;
2330 fontdata += j;
2331 }
2332 } else if (font->width <= 24) {
2333 for (i = 0; i < font->charcount; i++) {
2334 for (j = 0; j < vc->vc_font.height; j++) {
2335 *data++ = fontdata[0];
2336 *data++ = fontdata[1];
2337 *data++ = fontdata[2];
2338 fontdata += sizeof(u32);
2339 }
2340 memset(data, 0, 3 * (32 - j));
2341 data += 3 * (32 - j);
2342 }
2343 } else {
2344 j = vc->vc_font.height * 4;
2345 for (i = 0; i < font->charcount; i++) {
2346 memcpy(data, fontdata, j);
2347 memset(data + j, 0, 128 - j);
2348 data += 128;
2349 fontdata += j;
2350 }
2351 }
2352 return 0;
2353}
2354
2355static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2356 const u8 * data, int userfont)
1da177e4
LT		 2357{
2358 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2359 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2360 struct display *p = &fb_display[vc->vc_num];
2361 int resize;
2362 int cnt;
2363 char *old_data = NULL;
2364
2365 if (CON_IS_VISIBLE(vc) && softback_lines)
2366 fbcon_set_origin(vc);
2367
2368 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2369 if (p->userfont)
2370 old_data = vc->vc_font.data;
2371 if (userfont)
2372 cnt = FNTCHARCNT(data);
2373 else
2374 cnt = 256;
2f4516db 2375 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2376 if ((p->userfont = userfont))
2377 REFCOUNT(data)++;
2378 vc->vc_font.width = w;
2379 vc->vc_font.height = h;
2380 if (vc->vc_hi_font_mask && cnt == 256) {
2381 vc->vc_hi_font_mask = 0;
2382 if (vc->vc_can_do_color) {
2383 vc->vc_complement_mask >>= 1;
2384 vc->vc_s_complement_mask >>= 1;
2385 }
2386
2387 /* ++Edmund: reorder the attribute bits */
2388 if (vc->vc_can_do_color) {
2389 unsigned short *cp =
2390 (unsigned short *) vc->vc_origin;
2391 int count = vc->vc_screenbuf_size / 2;
2392 unsigned short c;
2393 for (; count > 0; count--, cp++) {
2394 c = scr_readw(cp);
2395 scr_writew(((c & 0xfe00) >> 1) |
2396 (c & 0xff), cp);
2397 }
2398 c = vc->vc_video_erase_char;
2399 vc->vc_video_erase_char =
2400 ((c & 0xfe00) >> 1) | (c & 0xff);
2401 vc->vc_attr >>= 1;
2402 }
2403 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2404 vc->vc_hi_font_mask = 0x100;
2405 if (vc->vc_can_do_color) {
2406 vc->vc_complement_mask <<= 1;
2407 vc->vc_s_complement_mask <<= 1;
2408 }
2409
2410 /* ++Edmund: reorder the attribute bits */
2411 {
2412 unsigned short *cp =
2413 (unsigned short *) vc->vc_origin;
2414 int count = vc->vc_screenbuf_size / 2;
2415 unsigned short c;
2416 for (; count > 0; count--, cp++) {
2417 unsigned short newc;
2418 c = scr_readw(cp);
2419 if (vc->vc_can_do_color)
2420 newc =
2421 ((c & 0xff00) << 1) | (c &
2422 0xff);
2423 else
2424 newc = c & ~0x100;
2425 scr_writew(newc, cp);
2426 }
2427 c = vc->vc_video_erase_char;
2428 if (vc->vc_can_do_color) {
2429 vc->vc_video_erase_char =
2430 ((c & 0xff00) << 1) | (c & 0xff);
2431 vc->vc_attr <<= 1;
2432 } else
2433 vc->vc_video_erase_char = c & ~0x100;
2434 }
2435
2436 }
2437
2438 if (resize) {
e4fc2761
AD		 2439 int cols, rows;
2440
2441 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2442 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2443 cols /= w;
2444 rows /= h;
2445 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2446 if (CON_IS_VISIBLE(vc) && softback_buf)
2447 fbcon_update_softback(vc);
1da177e4
LT		 2448 } else if (CON_IS_VISIBLE(vc)
2449 && vc->vc_mode == KD_TEXT) {
2450 fbcon_clear_margins(vc, 0);
2451 update_screen(vc);
2452 }
2453
2454 if (old_data && (--REFCOUNT(old_data) == 0))
2455 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2456 return 0;
2457}
2458
2459static int fbcon_copy_font(struct vc_data *vc, int con)
2460{
2461 struct display *od = &fb_display[con];
2462 struct console_font *f = &vc->vc_font;
2463
2464 if (od->fontdata == f->data)
2465 return 0; /* already the same font... */
2466 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2467}
2468
2469/*
2470 * User asked to set font; we are guaranteed that
2471 * a) width and height are in range 1..32
2472 * b) charcount does not exceed 512
2473 * but lets not assume that, since someone might someday want to use larger
2474 * fonts. And charcount of 512 is small for unicode support.
2475 *
2476 * However, user space gives the font in 32 rows , regardless of
2477 * actual font height. So a new API is needed if support for larger fonts
2478 * is ever implemented.
2479 */
2480
2481static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2482{
2483 unsigned charcount = font->charcount;
2484 int w = font->width;
2485 int h = font->height;
2486 int size;
2487 int i, csum;
2488 u8 *new_data, *data = font->data;
2489 int pitch = (font->width+7) >> 3;
2490
2491 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2492 * If not this check should be changed to charcount < 256 */
2493 if (charcount != 256 && charcount != 512)
2494 return -EINVAL;
2495
2496 size = h * pitch * charcount;
2497
2498 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2499
2500 if (!new_data)
2501 return -ENOMEM;
2502
2503 new_data += FONT_EXTRA_WORDS * sizeof(int);
2504 FNTSIZE(new_data) = size;
2505 FNTCHARCNT(new_data) = charcount;
2506 REFCOUNT(new_data) = 0; /* usage counter */
2507 for (i=0; i< charcount; i++) {
2508 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2509 }
2510
2511 /* Since linux has a nice crc32 function use it for counting font
2512 * checksums. */
2513 csum = crc32(0, new_data, size);
2514
2515 FNTSUM(new_data) = csum;
2516 /* Check if the same font is on some other console already */
e614b18d 2517 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2518 struct vc_data *tmp = vc_cons[i].d;
2519
2520 if (fb_display[i].userfont &&
2521 fb_display[i].fontdata &&
2522 FNTSUM(fb_display[i].fontdata) == csum &&
2523 FNTSIZE(fb_display[i].fontdata) == size &&
2524 tmp->vc_font.width == w &&
2525 !memcmp(fb_display[i].fontdata, new_data, size)) {
2526 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2527 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2528 break;
2529 }
2530 }
2531 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2532}
2533
2534static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2535{
2536 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2537 const struct font_desc *f;
1da177e4
LT		 2538
2539 if (!name)
2540 f = get_default_font(info->var.xres, info->var.yres);
2541 else if (!(f = find_font(name)))
2542 return -ENOENT;
2543
2544 font->width = f->width;
2545 font->height = f->height;
2546 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2547}
2548
2549static u16 palette_red[16];
2550static u16 palette_green[16];
2551static u16 palette_blue[16];
2552
2553static struct fb_cmap palette_cmap = {
2554 0, 16, palette_red, palette_green, palette_blue, NULL
2555};
2556
2557static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2558{
2559 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2560 int i, j, k, depth;
2561 u8 val;
2562
2563 if (fbcon_is_inactive(vc, info))
2564 return -EINVAL;
2565
2566 if (!CON_IS_VISIBLE(vc))
2567 return 0;
2568
b8c90945 2569 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2570 if (depth > 3) {
2571 for (i = j = 0; i < 16; i++) {
2572 k = table[i];
2573 val = vc->vc_palette[j++];
2574 palette_red[k] = (val << 8) | val;
2575 val = vc->vc_palette[j++];
2576 palette_green[k] = (val << 8) | val;
2577 val = vc->vc_palette[j++];
2578 palette_blue[k] = (val << 8) | val;
2579 }
2580 palette_cmap.len = 16;
2581 palette_cmap.start = 0;
2582 /*
2583 * If framebuffer is capable of less than 16 colors,
2584 * use default palette of fbcon.
2585 */
2586 } else
2587 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2588
2589 return fb_set_cmap(&palette_cmap, info);
2590}
2591
2592static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2593{
2594 unsigned long p;
2595 int line;
2596
2597 if (vc->vc_num != fg_console || !softback_lines)
2598 return (u16 *) (vc->vc_origin + offset);
2599 line = offset / vc->vc_size_row;
2600 if (line >= softback_lines)
2601 return (u16 *) (vc->vc_origin + offset -
2602 softback_lines * vc->vc_size_row);
2603 p = softback_curr + offset;
2604 if (p >= softback_end)
2605 p += softback_buf - softback_end;
2606 return (u16 *) p;
2607}
2608
2609static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2610 int *px, int *py)
2611{
2612 unsigned long ret;
2613 int x, y;
2614
2615 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2616 unsigned long offset = (pos - vc->vc_origin) / 2;
2617
2618 x = offset % vc->vc_cols;
2619 y = offset / vc->vc_cols;
2620 if (vc->vc_num == fg_console)
2621 y += softback_lines;
2622 ret = pos + (vc->vc_cols - x) * 2;
2623 } else if (vc->vc_num == fg_console && softback_lines) {
2624 unsigned long offset = pos - softback_curr;
2625
2626 if (pos < softback_curr)
2627 offset += softback_end - softback_buf;
2628 offset /= 2;
2629 x = offset % vc->vc_cols;
2630 y = offset / vc->vc_cols;
2631 ret = pos + (vc->vc_cols - x) * 2;
2632 if (ret == softback_end)
2633 ret = softback_buf;
2634 if (ret == softback_in)
2635 ret = vc->vc_origin;
2636 } else {
2637 /* Should not happen */
2638 x = y = 0;
2639 ret = vc->vc_origin;
2640 }
2641 if (px)
2642 *px = x;
2643 if (py)
2644 *py = y;
2645 return ret;
2646}
2647
2648/* As we might be inside of softback, we may work with non-contiguous buffer,
2649 that's why we have to use a separate routine. */
2650static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2651{
2652 while (cnt--) {
2653 u16 a = scr_readw(p);
2654 if (!vc->vc_can_do_color)
2655 a ^= 0x0800;
2656 else if (vc->vc_hi_font_mask == 0x100)
2657 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2658 (((a) & 0x0e00) << 4);
2659 else
2660 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2661 (((a) & 0x0700) << 4);
2662 scr_writew(a, p++);
2663 if (p == (u16 *) softback_end)
2664 p = (u16 *) softback_buf;
2665 if (p == (u16 *) softback_in)
2666 p = (u16 *) vc->vc_origin;
2667 }
2668}
2669
2670static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2671{
2672 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2673 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2674 struct display *p = &fb_display[fg_console];
2675 int offset, limit, scrollback_old;
2676
2677 if (softback_top) {
2678 if (vc->vc_num != fg_console)
2679 return 0;
2680 if (vc->vc_mode != KD_TEXT || !lines)
2681 return 0;
2682 if (logo_shown >= 0) {
2683 struct vc_data *conp2 = vc_cons[logo_shown].d;
2684
2685 if (conp2->vc_top == logo_lines
2686 && conp2->vc_bottom == conp2->vc_rows)
2687 conp2->vc_top = 0;
2688 if (logo_shown == vc->vc_num) {
2689 unsigned long p, q;
2690 int i;
2691
2692 p = softback_in;
2693 q = vc->vc_origin +
2694 logo_lines * vc->vc_size_row;
2695 for (i = 0; i < logo_lines; i++) {
2696 if (p == softback_top)
2697 break;
2698 if (p == softback_buf)
2699 p = softback_end;
2700 p -= vc->vc_size_row;
2701 q -= vc->vc_size_row;
2702 scr_memcpyw((u16 *) q, (u16 *) p,
2703 vc->vc_size_row);
2704 }
308af929 2705 softback_in = softback_curr = p;
1da177e4
LT		 2706 update_region(vc, vc->vc_origin,
2707 logo_lines * vc->vc_cols);
2708 }
2709 logo_shown = FBCON_LOGO_CANSHOW;
2710 }
2711 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2712 fbcon_redraw_softback(vc, p, lines);
2713 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2714 return 0;
2715 }
2716
2717 if (!scrollback_phys_max)
2718 return -ENOSYS;
2719
2720 scrollback_old = scrollback_current;
2721 scrollback_current -= lines;
2722 if (scrollback_current < 0)
2723 scrollback_current = 0;
2724 else if (scrollback_current > scrollback_max)
2725 scrollback_current = scrollback_max;
2726 if (scrollback_current == scrollback_old)
2727 return 0;
2728
2729 if (fbcon_is_inactive(vc, info))
2730 return 0;
2731
2732 fbcon_cursor(vc, CM_ERASE);
2733
2734 offset = p->yscroll - scrollback_current;
2735 limit = p->vrows;
2736 switch (p->scrollmode) {
2737 case SCROLL_WRAP_MOVE:
2738 info->var.vmode |= FB_VMODE_YWRAP;
2739 break;
2740 case SCROLL_PAN_MOVE:
2741 case SCROLL_PAN_REDRAW:
2742 limit -= vc->vc_rows;
2743 info->var.vmode &= ~FB_VMODE_YWRAP;
2744 break;
2745 }
2746 if (offset < 0)
2747 offset += limit;
2748 else if (offset >= limit)
2749 offset -= limit;
e4fc2761
AD		 2750
2751 ops->var.xoffset = 0;
2752 ops->var.yoffset = offset * vc->vc_font.height;
2753 ops->update_start(info);
2754
1da177e4
LT		 2755 if (!scrollback_current)
2756 fbcon_cursor(vc, CM_DRAW);
2757 return 0;
2758}
2759
2760static int fbcon_set_origin(struct vc_data *vc)
2761{
2762 if (softback_lines)
2763 fbcon_scrolldelta(vc, softback_lines);
2764 return 0;
2765}
2766
2767static void fbcon_suspended(struct fb_info *info)
2768{
2769 struct vc_data *vc = NULL;
2770 struct fbcon_ops *ops = info->fbcon_par;
2771
2772 if (!ops || ops->currcon < 0)
2773 return;
2774 vc = vc_cons[ops->currcon].d;
2775
2776 /* Clear cursor, restore saved data */
2777 fbcon_cursor(vc, CM_ERASE);
2778}
2779
2780static void fbcon_resumed(struct fb_info *info)
2781{
2782 struct vc_data *vc;
2783 struct fbcon_ops *ops = info->fbcon_par;
2784
2785 if (!ops || ops->currcon < 0)
2786 return;
2787 vc = vc_cons[ops->currcon].d;
2788
2789 update_screen(vc);
2790}
2791
2792static void fbcon_modechanged(struct fb_info *info)
2793{
2794 struct fbcon_ops *ops = info->fbcon_par;
2795 struct vc_data *vc;
2796 struct display *p;
2797 int rows, cols;
2798
2799 if (!ops || ops->currcon < 0)
2800 return;
2801 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2802 if (vc->vc_mode != KD_TEXT ||
2803 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2804 return;
2805
2806 p = &fb_display[vc->vc_num];
b73deed3 2807 set_blitting_type(vc, info);
1da177e4
LT		 2808
2809 if (CON_IS_VISIBLE(vc)) {
2810 var_to_display(p, &info->var, info);
e4fc2761
AD		 2811 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2812 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2813 cols /= vc->vc_font.width;
2814 rows /= vc->vc_font.height;
1da177e4
LT		 2815 vc_resize(vc, cols, rows);
2816 updatescrollmode(p, info, vc);
2817 scrollback_max = 0;
2818 scrollback_current = 0;
4e1567d3
AD		 2819
2820 if (!fbcon_is_inactive(vc, info)) {
2821 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2822 ops->update_start(info);
2823 }
2824
1da177e4
LT		 2825 fbcon_set_palette(vc, color_table);
2826 update_screen(vc);
4d9c5b6e
AD		 2827 if (softback_buf)
2828 fbcon_update_softback(vc);
1da177e4
LT		 2829 }
2830}
2831
7726e9e1
AD		 2832static void fbcon_set_all_vcs(struct fb_info *info)
2833{
2834 struct fbcon_ops *ops = info->fbcon_par;
2835 struct vc_data *vc;
2836 struct display *p;
2837 int i, rows, cols;
2838
2839 if (!ops || ops->currcon < 0)
2840 return;
2841
e614b18d 2842 for (i = first_fb_vc; i <= last_fb_vc; i++) {
7726e9e1
AD		 2843 vc = vc_cons[i].d;
2844 if (!vc || vc->vc_mode != KD_TEXT ||
2845 registered_fb[con2fb_map[i]] != info)
2846 continue;
2847
2848 p = &fb_display[vc->vc_num];
b73deed3 2849 set_blitting_type(vc, info);
7726e9e1 2850 var_to_display(p, &info->var, info);
e4fc2761
AD		 2851 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2852 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2853 cols /= vc->vc_font.width;
2854 rows /= vc->vc_font.height;
7726e9e1
AD		 2855 vc_resize(vc, cols, rows);
2856
2857 if (CON_IS_VISIBLE(vc)) {
2858 updatescrollmode(p, info, vc);
2859 scrollback_max = 0;
2860 scrollback_current = 0;
4e1567d3
AD		 2861
2862 if (!fbcon_is_inactive(vc, info)) {
2863 ops->var.xoffset = ops->var.yoffset =
2864 p->yscroll = 0;
2865 ops->update_start(info);
2866 }
2867
7726e9e1
AD		 2868 fbcon_set_palette(vc, color_table);
2869 update_screen(vc);
4d9c5b6e
AD		 2870 if (softback_buf)
2871 fbcon_update_softback(vc);
7726e9e1
AD		 2872 }
2873 }
04a2fe57
AD		 2874
2875 ops->p = &fb_display[ops->currcon];
7726e9e1
AD		 2876}
2877
1da177e4
LT		 2878static int fbcon_mode_deleted(struct fb_info *info,
2879 struct fb_videomode *mode)
2880{
2881 struct fb_info *fb_info;
2882 struct display *p;
2883 int i, j, found = 0;
2884
2885 /* before deletion, ensure that mode is not in use */
2886 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2887 j = con2fb_map[i];
2888 if (j == -1)
2889 continue;
2890 fb_info = registered_fb[j];
2891 if (fb_info != info)
2892 continue;
2893 p = &fb_display[i];
2894 if (!p || !p->mode)
2895 continue;
2896 if (fb_mode_is_equal(p->mode, mode)) {
2897 found = 1;
2898 break;
2899 }
2900 }
2901 return found;
2902}
2903
e614b18d
AD		 2904static int fbcon_fb_unregistered(int idx)
2905{
2906 int i;
2907
2908 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2909 if (con2fb_map[i] == idx)
2910 con2fb_map[i] = -1;
2911 }
2912
2913 if (idx == info_idx) {
2914 info_idx = -1;
2915
2916 for (i = 0; i < FB_MAX; i++) {
2917 if (registered_fb[i] != NULL) {
2918 info_idx = i;
2919 break;
2920 }
2921 }
2922 }
2923
2924 if (info_idx != -1) {
2925 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2926 if (con2fb_map[i] == -1)
2927 con2fb_map[i] = info_idx;
2928 }
2929 }
2930
2931 if (!num_registered_fb)
2932 unregister_con_driver(&fb_con);
2933
2934 return 0;
2935}
2936
1da177e4
LT		 2937static int fbcon_fb_registered(int idx)
2938{
2939 int ret = 0, i;
2940
2941 if (info_idx == -1) {
e614b18d 2942 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2943 if (con2fb_map_boot[i] == idx) {
2944 info_idx = idx;
2945 break;
2946 }
2947 }
e614b18d 2948
1da177e4
LT		 2949 if (info_idx != -1)
2950 ret = fbcon_takeover(1);
2951 } else {
e614b18d 2952 for (i = first_fb_vc; i <= last_fb_vc; i++) {
5428b044
AD		 2953 if (con2fb_map_boot[i] == idx &&
2954 con2fb_map[i] == -1)
1da177e4
LT		 2955 set_con2fb_map(i, idx, 0);
2956 }
2957 }
2958
2959 return ret;
2960}
2961
2962static void fbcon_fb_blanked(struct fb_info *info, int blank)
2963{
2964 struct fbcon_ops *ops = info->fbcon_par;
2965 struct vc_data *vc;
2966
2967 if (!ops || ops->currcon < 0)
2968 return;
2969
2970 vc = vc_cons[ops->currcon].d;
2971 if (vc->vc_mode != KD_TEXT ||
2972 registered_fb[con2fb_map[ops->currcon]] != info)
2973 return;
2974
2975 if (CON_IS_VISIBLE(vc)) {
2976 if (blank)
2977 do_blank_screen(0);
2978 else
2979 do_unblank_screen(0);
2980 }
2981 ops->blank_state = blank;
2982}
2983
2984static void fbcon_new_modelist(struct fb_info *info)
2985{
2986 int i;
2987 struct vc_data *vc;
2988 struct fb_var_screeninfo var;
9791d763 2989 const struct fb_videomode *mode;
1da177e4 2990
e614b18d 2991 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2992 if (registered_fb[con2fb_map[i]] != info)
2993 continue;
2994 if (!fb_display[i].mode)
2995 continue;
2996 vc = vc_cons[i].d;
2997 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 2998 mode = fb_find_nearest_mode(fb_display[i].mode,
2999 &info->modelist);
1da177e4
LT		 3000 fb_videomode_to_var(&var, mode);
3001
3002 if (vc)
3003 fbcon_set_disp(info, &var, vc);
3004 else
3005 fbcon_preset_disp(info, &var, i);
3006
3007 }
3008}
3009
3010static int fbcon_event_notify(struct notifier_block *self,
3011 unsigned long action, void *data)
3012{
3013 struct fb_event *event = data;
3014 struct fb_info *info = event->info;
3015 struct fb_videomode *mode;
3016 struct fb_con2fbmap *con2fb;
3017 int ret = 0;
3018
e614b18d
AD		 3019 /*
3020 * ignore all events except driver registration and deregistration
3021 * if fbcon is not active
3022 */
3023 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3024 action == FB_EVENT_FB_UNREGISTERED))
3025 goto done;
3026
1da177e4
LT		 3027 switch(action) {
3028 case FB_EVENT_SUSPEND:
3029 fbcon_suspended(info);
3030 break;
3031 case FB_EVENT_RESUME:
3032 fbcon_resumed(info);
3033 break;
3034 case FB_EVENT_MODE_CHANGE:
3035 fbcon_modechanged(info);
3036 break;
7726e9e1
AD		 3037 case FB_EVENT_MODE_CHANGE_ALL:
3038 fbcon_set_all_vcs(info);
3039 break;
1da177e4
LT		 3040 case FB_EVENT_MODE_DELETE:
3041 mode = event->data;
3042 ret = fbcon_mode_deleted(info, mode);
3043 break;
3044 case FB_EVENT_FB_REGISTERED:
3045 ret = fbcon_fb_registered(info->node);
3046 break;
e614b18d
AD		 3047 case FB_EVENT_FB_UNREGISTERED:
3048 ret = fbcon_fb_unregistered(info->node);
3049 break;
1da177e4
LT		 3050 case FB_EVENT_SET_CONSOLE_MAP:
3051 con2fb = event->data;
3052 ret = set_con2fb_map(con2fb->console - 1,
3053 con2fb->framebuffer, 1);
3054 break;
3055 case FB_EVENT_GET_CONSOLE_MAP:
3056 con2fb = event->data;
3057 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3058 break;
3059 case FB_EVENT_BLANK:
3060 fbcon_fb_blanked(info, *(int *)event->data);
3061 break;
3062 case FB_EVENT_NEW_MODELIST:
3063 fbcon_new_modelist(info);
3064 break;
3065 }
3066
e614b18d 3067done:
1da177e4
LT		 3068 return ret;
3069}
3070
3071/*
3072 * The console `switch' structure for the frame buffer based console
3073 */
3074
3075static const struct consw fb_con = {
3076 .owner = THIS_MODULE,
3077 .con_startup = fbcon_startup,
3078 .con_init = fbcon_init,
3079 .con_deinit = fbcon_deinit,
3080 .con_clear = fbcon_clear,
3081 .con_putc = fbcon_putc,
3082 .con_putcs = fbcon_putcs,
3083 .con_cursor = fbcon_cursor,
3084 .con_scroll = fbcon_scroll,
3085 .con_bmove = fbcon_bmove,
3086 .con_switch = fbcon_switch,
3087 .con_blank = fbcon_blank,
3088 .con_font_set = fbcon_set_font,
3089 .con_font_get = fbcon_get_font,
3090 .con_font_default = fbcon_set_def_font,
3091 .con_font_copy = fbcon_copy_font,
3092 .con_set_palette = fbcon_set_palette,
3093 .con_scrolldelta = fbcon_scrolldelta,
3094 .con_set_origin = fbcon_set_origin,
3095 .con_invert_region = fbcon_invert_region,
3096 .con_screen_pos = fbcon_screen_pos,
3097 .con_getxy = fbcon_getxy,
3098 .con_resize = fbcon_resize,
3099};
3100
3101static struct notifier_block fbcon_event_notifier = {
3102 .notifier_call = fbcon_event_notify,
3103};
3104
9a179176
AD		 3105static ssize_t store_rotate(struct class_device *class_device,
3106 const char *buf, size_t count)
3107{
3108 struct fb_info *info;
3109 int rotate, idx;
3110 char **last = NULL;
3111
e614b18d
AD		 3112 if (fbcon_has_exited)
3113 return count;
3114
9a179176
AD		 3115 acquire_console_sem();
3116 idx = con2fb_map[fg_console];
3117
3118 if (idx == -1 || registered_fb[idx] == NULL)
3119 goto err;
3120
3121 info = registered_fb[idx];
3122 rotate = simple_strtoul(buf, last, 0);
3123 fbcon_rotate(info, rotate);
3124err:
3125 release_console_sem();
3126 return count;
3127}
3128
3129static ssize_t store_rotate_all(struct class_device *class_device,
3130 const char *buf, size_t count)
3131{
3132 struct fb_info *info;
3133 int rotate, idx;
3134 char **last = NULL;
3135
e614b18d
AD		 3136 if (fbcon_has_exited)
3137 return count;
3138
9a179176
AD		 3139 acquire_console_sem();
3140 idx = con2fb_map[fg_console];
3141
3142 if (idx == -1 || registered_fb[idx] == NULL)
3143 goto err;
3144
3145 info = registered_fb[idx];
3146 rotate = simple_strtoul(buf, last, 0);
3147 fbcon_rotate_all(info, rotate);
3148err:
3149 release_console_sem();
3150 return count;
3151}
3152
3153static ssize_t show_rotate(struct class_device *class_device, char *buf)
3154{
3155 struct fb_info *info;
3156 int rotate = 0, idx;
3157
e614b18d
AD		 3158 if (fbcon_has_exited)
3159 return 0;
3160
9a179176
AD		 3161 acquire_console_sem();
3162 idx = con2fb_map[fg_console];
3163
3164 if (idx == -1 || registered_fb[idx] == NULL)
3165 goto err;
3166
3167 info = registered_fb[idx];
3168 rotate = fbcon_get_rotate(info);
3169err:
3170 release_console_sem();
3171 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3172}
3173
3174static struct class_device_attribute class_device_attrs[] = {
3175 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3176 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3177};
3178
3179static int fbcon_init_class_device(void)
3180{
0a727dea
AD		 3181 int i, error = 0;
3182
3183 fbcon_has_sysfs = 1;
3184
3185 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3186 error = class_device_create_file(fbcon_class_device,
3187 &class_device_attrs[i]);
3188
3189 if (error)
3190 break;
3191 }
3192
3193 if (error) {
3194 while (--i >= 0)
3195 class_device_remove_file(fbcon_class_device,
3196 &class_device_attrs[i]);
3197
3198 fbcon_has_sysfs = 0;
3199 }
9a179176 3200
9a179176
AD		 3201 return 0;
3202}
3203
5428b044 3204static void fbcon_start(void)
1da177e4 3205{
5428b044
AD		 3206 if (num_registered_fb) {
3207 int i;
9a179176 3208
5428b044 3209 acquire_console_sem();
1da177e4 3210
1da177e4
LT		 3211 for (i = 0; i < FB_MAX; i++) {
3212 if (registered_fb[i] != NULL) {
3213 info_idx = i;
3214 break;
3215 }
3216 }
5428b044
AD		 3217
3218 release_console_sem();
1da177e4
LT		 3219 fbcon_takeover(0);
3220 }
9a179176
AD		 3221}
3222
5428b044 3223static void fbcon_exit(void)
9a179176 3224{
e55186fe
AD		 3225 struct fb_info *info;
3226 int i, j, mapped;
3227
e614b18d
AD		 3228 if (fbcon_has_exited)
3229 return;
3230
e55186fe 3231#ifdef CONFIG_ATARI
956295d5 3232 free_irq(IRQ_AUTO_4, fb_vbl_handler);
e55186fe
AD		 3233#endif
3234#ifdef CONFIG_MAC
3235 if (MACH_IS_MAC && vbl_detected)
956295d5 3236 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
e55186fe
AD		 3237#endif
3238
3239 kfree((void *)softback_buf);
5428b044 3240 softback_buf = 0UL;
e55186fe
AD		 3241
3242 for (i = 0; i < FB_MAX; i++) {
3243 mapped = 0;
3244 info = registered_fb[i];
3245
3246 if (info == NULL)
3247 continue;
3248
e614b18d
AD		 3249 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3250 if (con2fb_map[j] == i)
e55186fe 3251 mapped = 1;
e55186fe
AD		 3252 }
3253
3254 if (mapped) {
3255 if (info->fbops->fb_release)
3256 info->fbops->fb_release(info, 0);
3257 module_put(info->fbops->owner);
5428b044
AD		 3258
3259 if (info->fbcon_par) {
e299dd4d
DJ		 3260 struct fbcon_ops *ops = info->fbcon_par;
3261
5428b044 3262 fbcon_del_cursor_timer(info);
e299dd4d 3263 kfree(ops->cursor_src);
5428b044
AD		 3264 kfree(info->fbcon_par);
3265 info->fbcon_par = NULL;
3266 }
3267
3268 if (info->queue.func == fb_flashcursor)
3269 info->queue.func = NULL;
e55186fe
AD		 3270 }
3271 }
3272
e614b18d 3273 fbcon_has_exited = 1;
5428b044
AD		 3274}
3275
3276static int __init fb_console_init(void)
3277{
3278 int i;
3279
3280 acquire_console_sem();
3281 fb_register_client(&fbcon_event_notifier);
3282 fbcon_class_device =
5bd42536 3283 class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
5428b044
AD		 3284
3285 if (IS_ERR(fbcon_class_device)) {
3286 printk(KERN_WARNING "Unable to create class_device "
3287 "for fbcon; errno = %ld\n",
3288 PTR_ERR(fbcon_class_device));
3289 fbcon_class_device = NULL;
3290 } else
3291 fbcon_init_class_device();
3292
3293 for (i = 0; i < MAX_NR_CONSOLES; i++)
3294 con2fb_map[i] = -1;
3295
3296 release_console_sem();
3297 fbcon_start();
3298 return 0;
3299}
3300
3301module_init(fb_console_init);
3302
3303#ifdef MODULE
3304
e614b18d 3305static void __exit fbcon_deinit_class_device(void)
5428b044
AD		 3306{
3307 int i;
3308
0a727dea
AD		 3309 if (fbcon_has_sysfs) {
3310 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3311 class_device_remove_file(fbcon_class_device,
3312 &class_device_attrs[i]);
3313
3314 fbcon_has_sysfs = 0;
3315 }
9a179176
AD		 3316}
3317
1da177e4
LT		 3318static void __exit fb_console_exit(void)
3319{
3320 acquire_console_sem();
3321 fb_unregister_client(&fbcon_event_notifier);
5428b044 3322 fbcon_deinit_class_device();
5bd42536 3323 class_device_destroy(fb_class, MKDEV(0, 0));
e614b18d 3324 fbcon_exit();
1da177e4 3325 release_console_sem();
e614b18d 3326 unregister_con_driver(&fb_con);
1da177e4
LT		 3327}
3328
3329module_exit(fb_console_exit);
3330
3331#endif
3332
3333MODULE_LICENSE("GPL");
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