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vt/fbcon: deinitialize resources in visual_init() after failed memory allocation
[mirror_ubuntu-bionic-kernel.git] / drivers / video / fbdev / core / fbcon.c
CommitLineData
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>
6104c370 71#include <linux/fbcon.h>
1da177e4
LT		 72#include <linux/vt_kern.h>
73#include <linux/selection.h>
74#include <linux/font.h>
75#include <linux/smp.h>
76#include <linux/init.h>
77#include <linux/interrupt.h>
78#include <linux/crc32.h> /* For counting font checksums */
623e71b0 79#include <asm/fb.h>
1da177e4 80#include <asm/irq.h>
1da177e4
LT		 81
82#include "fbcon.h"
83
84#ifdef FBCONDEBUG
5ae12170 85# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
1da177e4
LT		 86#else
87# define DPRINTK(fmt, args...)
88#endif
89
90enum {
91 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
92 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
93 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
94};
95
ab767201 96static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 97
1da177e4
LT		 98static signed char con2fb_map[MAX_NR_CONSOLES];
99static signed char con2fb_map_boot[MAX_NR_CONSOLES];
49a1d28f 100
1da177e4
LT		 101static int logo_lines;
102/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
103 enums. */
104static int logo_shown = FBCON_LOGO_CANSHOW;
105/* Software scrollback */
106static int fbcon_softback_size = 32768;
107static unsigned long softback_buf, softback_curr;
108static unsigned long softback_in;
109static unsigned long softback_top, softback_end;
110static int softback_lines;
111/* console mappings */
112static int first_fb_vc;
113static int last_fb_vc = MAX_NR_CONSOLES - 1;
114static int fbcon_is_default = 1;
e614b18d 115static int fbcon_has_exited;
623e71b0 116static int primary_device = -1;
2ddce3fd 117static int fbcon_has_console_bind;
4769a9a5
AD		 118
119#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
623e71b0 120static int map_override;
e614b18d 121
4769a9a5
AD		 122static inline void fbcon_map_override(void)
123{
124 map_override = 1;
125}
126#else
127static inline void fbcon_map_override(void)
128{
129}
130#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
131
1da177e4
LT		 132/* font data */
133static char fontname[40];
134
135/* current fb_info */
136static int info_idx = -1;
137
e4fc2761 138/* console rotation */
b0d8e409 139static int initial_rotation = -1;
0a727dea 140static int fbcon_has_sysfs;
74c1c8b3 141static int margin_color;
e4fc2761 142
1da177e4
LT		 143static const struct consw fb_con;
144
145#define CM_SOFTBACK (8)
146
147#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
148
1da177e4
LT		 149static int fbcon_set_origin(struct vc_data *);
150
acba9cd0 151static int fbcon_cursor_noblink;
1da177e4
LT		 152
153#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
154
155/*
156 * Interface used by the world
157 */
158
159static const char *fbcon_startup(void);
160static void fbcon_init(struct vc_data *vc, int init);
161static void fbcon_deinit(struct vc_data *vc);
162static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
163 int width);
164static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
165static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
166 int count, int ypos, int xpos);
167static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
168static void fbcon_cursor(struct vc_data *vc, int mode);
1da177e4
LT		 169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171static int fbcon_switch(struct vc_data *vc);
172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
709280da 173static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
1da177e4
LT		 174
175/*
176 * Internal routines
177 */
1da177e4
LT		 178static __inline__ void ywrap_up(struct vc_data *vc, int count);
179static __inline__ void ywrap_down(struct vc_data *vc, int count);
180static __inline__ void ypan_up(struct vc_data *vc, int count);
181static __inline__ void ypan_down(struct vc_data *vc, int count);
182static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
183 int dy, int dx, int height, int width, u_int y_break);
184static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 185 int unit);
1da177e4
LT		 186static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
187 int line, int count, int dy);
a812c94b
AD		 188static void fbcon_modechanged(struct fb_info *info);
189static void fbcon_set_all_vcs(struct fb_info *info);
5428b044
AD		 190static void fbcon_start(void);
191static void fbcon_exit(void);
0c6c1ce0 192static struct device *fbcon_device;
9a179176 193
dbcbfe1e 194#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 195static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 196{
197 struct fbcon_ops *ops = info->fbcon_par;
198
199 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 200 ops->p->con_rotate < 4)
201 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 202 else
203 ops->rotate = 0;
204}
a812c94b
AD		 205
206static void fbcon_rotate(struct fb_info *info, u32 rotate)
207{
208 struct fbcon_ops *ops= info->fbcon_par;
209 struct fb_info *fb_info;
210
211 if (!ops || ops->currcon == -1)
212 return;
213
214 fb_info = registered_fb[con2fb_map[ops->currcon]];
215
216 if (info == fb_info) {
217 struct display *p = &fb_display[ops->currcon];
218
219 if (rotate < 4)
220 p->con_rotate = rotate;
221 else
222 p->con_rotate = 0;
223
224 fbcon_modechanged(info);
225 }
226}
227
228static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
229{
230 struct fbcon_ops *ops = info->fbcon_par;
231 struct vc_data *vc;
232 struct display *p;
233 int i;
234
235 if (!ops || ops->currcon < 0 || rotate > 3)
236 return;
237
e614b18d 238 for (i = first_fb_vc; i <= last_fb_vc; i++) {
a812c94b
AD		 239 vc = vc_cons[i].d;
240 if (!vc || vc->vc_mode != KD_TEXT ||
241 registered_fb[con2fb_map[i]] != info)
242 continue;
243
244 p = &fb_display[vc->vc_num];
245 p->con_rotate = rotate;
246 }
247
248 fbcon_set_all_vcs(info);
249}
dbcbfe1e 250#else
b73deed3 251static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 252{
253 struct fbcon_ops *ops = info->fbcon_par;
254
255 ops->rotate = FB_ROTATE_UR;
256}
a812c94b
AD		 257
258static void fbcon_rotate(struct fb_info *info, u32 rotate)
259{
260 return;
261}
262
263static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
264{
265 return;
266}
dbcbfe1e 267#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 268
a812c94b
AD		 269static int fbcon_get_rotate(struct fb_info *info)
270{
271 struct fbcon_ops *ops = info->fbcon_par;
272
273 return (ops) ? ops->rotate : 0;
274}
275
1da177e4
LT		 276static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
277{
278 struct fbcon_ops *ops = info->fbcon_par;
279
280 return (info->state != FBINFO_STATE_RUNNING ||
8fd4bd22
JB		 281 vc->vc_mode != KD_TEXT || ops->graphics) &&
282 !vt_force_oops_output(vc);
1da177e4
LT		 283}
284
da909ce4 285static int get_color(struct vc_data *vc, struct fb_info *info,
1da177e4
LT		 286 u16 c, int is_fg)
287{
b8c90945 288 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 289 int color = 0;
290
291 if (console_blanked) {
292 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
293
294 c = vc->vc_video_erase_char & charmask;
295 }
296
297 if (depth != 1)
298 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
299 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
300
301 switch (depth) {
302 case 1:
303 {
91c43132 304 int col = mono_col(info);
1da177e4 305 /* 0 or 1 */
b8c90945
AD		 306 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
307 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 308
309 if (console_blanked)
310 fg = bg;
311
312 color = (is_fg) ? fg : bg;
313 break;
314 }
315 case 2:
316 /*
317 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 318 * is grayscale. However, simply dividing the values by 4
319 * will not work, as colors 1, 2 and 3 will be scaled-down
320 * to zero rendering them invisible. So empirically convert
321 * colors to a sane 4-level grayscale.
1da177e4 322 */
2cc38ed1
AD		 323 switch (color) {
324 case 0:
325 color = 0; /* black */
326 break;
327 case 1 ... 6:
328 color = 2; /* white */
329 break;
330 case 7 ... 8:
331 color = 1; /* gray */
332 break;
333 default:
334 color = 3; /* intense white */
335 break;
336 }
337 break;
1da177e4
LT		 338 case 3:
339 /*
340 * Last 8 entries of default 16-color palette is a more intense
341 * version of the first 8 (i.e., same chrominance, different
342 * luminance).
343 */
344 color &= 7;
345 break;
346 }
347
348
349 return color;
350}
351
4d9c5b6e
AD		 352static void fbcon_update_softback(struct vc_data *vc)
353{
354 int l = fbcon_softback_size / vc->vc_size_row;
355
356 if (l > 5)
357 softback_end = softback_buf + l * vc->vc_size_row;
358 else
359 /* Smaller scrollback makes no sense, and 0 would screw
360 the operation totally */
361 softback_top = 0;
362}
363
c4028958 364static void fb_flashcursor(struct work_struct *work)
1da177e4 365{
c4028958 366 struct fb_info *info = container_of(work, struct fb_info, queue);
1da177e4 367 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 368 struct vc_data *vc = NULL;
369 int c;
370 int mode;
d8636a27
DA		 371 int ret;
372
373 /* FIXME: we should sort out the unbind locking instead */
374 /* instead we just fail to flash the cursor if we can't get
375 * the lock instead of blocking fbcon deinit */
376 ret = console_trylock();
377 if (ret == 0)
378 return;
1da177e4 379
5428b044 380 if (ops && ops->currcon != -1)
1da177e4
LT		 381 vc = vc_cons[ops->currcon].d;
382
6ca8dfd7 383 if (!vc || !con_is_visible(vc) ||
dbd4f128 384 registered_fb[con2fb_map[vc->vc_num]] != info ||
212f2639 385 vc->vc_deccm != 1) {
ac751efa 386 console_unlock();
1da177e4 387 return;
5428b044
AD		 388 }
389
1da177e4
LT		 390 c = scr_readw((u16 *) vc->vc_pos);
391 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
392 CM_ERASE : CM_DRAW;
b73deed3 393 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4 394 get_color(vc, info, c, 0));
ac751efa 395 console_unlock();
1da177e4
LT		 396}
397
6c789357 398static void cursor_timer_handler(struct timer_list *t)
1da177e4 399{
6c789357
KC		 400 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
401 struct fb_info *info = ops->info;
1da177e4 402
a85f1a41 403 queue_work(system_power_efficient_wq, &info->queue);
27a4c827 404 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
1da177e4
LT		 405}
406
88fb2c6e
AD		 407static void fbcon_add_cursor_timer(struct fb_info *info)
408{
409 struct fbcon_ops *ops = info->fbcon_par;
410
411 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
acba9cd0
AD		 412 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
413 !fbcon_cursor_noblink) {
88fb2c6e 414 if (!info->queue.func)
c4028958 415 INIT_WORK(&info->queue, fb_flashcursor);
88fb2c6e 416
6c789357 417 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
cd7b917c 418 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
88fb2c6e
AD		 419 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
420 }
421}
422
423static void fbcon_del_cursor_timer(struct fb_info *info)
424{
425 struct fbcon_ops *ops = info->fbcon_par;
426
427 if (info->queue.func == fb_flashcursor &&
428 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
429 del_timer_sync(&ops->cursor_timer);
430 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
431 }
432}
433
1da177e4
LT		 434#ifndef MODULE
435static int __init fb_console_setup(char *this_opt)
436{
437 char *options;
438 int i, j;
439
440 if (!this_opt || !*this_opt)
9b41046c 441 return 1;
1da177e4
LT		 442
443 while ((options = strsep(&this_opt, ",")) != NULL) {
37773c4e 444 if (!strncmp(options, "font:", 5)) {
e432964a 445 strlcpy(fontname, options + 5, sizeof(fontname));
37773c4e
MH		 446 continue;
447 }
1da177e4
LT		 448
449 if (!strncmp(options, "scrollback:", 11)) {
450 options += 11;
451 if (*options) {
452 fbcon_softback_size = simple_strtoul(options, &options, 0);
453 if (*options == 'k' || *options == 'K') {
454 fbcon_softback_size *= 1024;
1da177e4 455 }
37773c4e
MH		 456 }
457 continue;
1da177e4
LT		 458 }
459
460 if (!strncmp(options, "map:", 4)) {
461 options += 4;
623e71b0 462 if (*options) {
1da177e4
LT		 463 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
464 if (!options[j])
465 j = 0;
466 con2fb_map_boot[i] =
467 (options[j++]-'0') % FB_MAX;
468 }
623e71b0 469
4769a9a5 470 fbcon_map_override();
623e71b0 471 }
37773c4e 472 continue;
1da177e4
LT		 473 }
474
475 if (!strncmp(options, "vc:", 3)) {
476 options += 3;
477 if (*options)
478 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
479 if (first_fb_vc < 0)
480 first_fb_vc = 0;
481 if (*options++ == '-')
482 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 fbcon_is_default = 0;
37773c4e
MH		 484 continue;
485 }
e4fc2761
AD		 486
487 if (!strncmp(options, "rotate:", 7)) {
488 options += 7;
489 if (*options)
2428e59b
MS		 490 initial_rotation = simple_strtoul(options, &options, 0);
491 if (initial_rotation > 3)
492 initial_rotation = 0;
37773c4e 493 continue;
e4fc2761 494 }
74c1c8b3
DL		 495
496 if (!strncmp(options, "margin:", 7)) {
497 options += 7;
498 if (*options)
499 margin_color = simple_strtoul(options, &options, 0);
74c1c8b3
DL		 500 continue;
501 }
1da177e4 502 }
9b41046c 503 return 1;
1da177e4
LT		 504}
505
506__setup("fbcon=", fb_console_setup);
507#endif
508
509static int search_fb_in_map(int idx)
510{
511 int i, retval = 0;
512
e614b18d 513 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 514 if (con2fb_map[i] == idx)
515 retval = 1;
516 }
517 return retval;
518}
519
520static int search_for_mapped_con(void)
521{
522 int i, retval = 0;
523
e614b18d 524 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 525 if (con2fb_map[i] != -1)
526 retval = 1;
527 }
528 return retval;
529}
530
50e244cc
AC		 531static int do_fbcon_takeover(int show_logo)
532{
533 int err, i;
534
535 if (!num_registered_fb)
536 return -ENODEV;
537
538 if (!show_logo)
539 logo_shown = FBCON_LOGO_DONTSHOW;
540
541 for (i = first_fb_vc; i <= last_fb_vc; i++)
542 con2fb_map[i] = info_idx;
543
544 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
545 fbcon_is_default);
546
547 if (err) {
548 for (i = first_fb_vc; i <= last_fb_vc; i++)
549 con2fb_map[i] = -1;
550 info_idx = -1;
551 } else {
552 fbcon_has_console_bind = 1;
1da177e4
LT		 553 }
554
555 return err;
556}
557
70802c60
AD		 558#ifdef MODULE
559static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
560 int cols, int rows, int new_cols, int new_rows)
561{
562 logo_shown = FBCON_LOGO_DONTSHOW;
563}
564#else
1da177e4
LT		 565static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
566 int cols, int rows, int new_cols, int new_rows)
567{
568 /* Need to make room for the logo */
9c44e5f6 569 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 570 int cnt, erase = vc->vc_video_erase_char, step;
571 unsigned short *save = NULL, *r, *q;
49a1d28f 572 int logo_height;
1da177e4 573
376b3ff5 574 if (info->fbops->owner) {
70802c60
AD		 575 logo_shown = FBCON_LOGO_DONTSHOW;
576 return;
577 }
578
1da177e4
LT		 579 /*
580 * remove underline attribute from erase character
581 * if black and white framebuffer.
582 */
b8c90945 583 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 584 erase &= ~0x400;
9c44e5f6 585 logo_height = fb_prepare_logo(info, ops->rotate);
416e74ea 586 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
1da177e4
LT		 587 q = (unsigned short *) (vc->vc_origin +
588 vc->vc_size_row * rows);
589 step = logo_lines * cols;
590 for (r = q - logo_lines * cols; r < q; r++)
591 if (scr_readw(r) != vc->vc_video_erase_char)
592 break;
593 if (r != q && new_rows >= rows + logo_lines) {
594 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
595 if (save) {
596 int i = cols < new_cols ? cols : new_cols;
597 scr_memsetw(save, erase, logo_lines * new_cols * 2);
598 r = q - step;
599 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
600 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
601 r = q;
602 }
603 }
604 if (r == q) {
605 /* We can scroll screen down */
606 r = q - step - cols;
607 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
608 scr_memcpyw(r + step, r, vc->vc_size_row);
609 r -= cols;
610 }
611 if (!save) {
250038f5
GU		 612 int lines;
613 if (vc->vc_y + logo_lines >= rows)
614 lines = rows - vc->vc_y - 1;
615 else
616 lines = logo_lines;
617 vc->vc_y += lines;
618 vc->vc_pos += lines * vc->vc_size_row;
1da177e4
LT		 619 }
620 }
621 scr_memsetw((unsigned short *) vc->vc_origin,
622 erase,
623 vc->vc_size_row * logo_lines);
624
6ca8dfd7 625 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1da177e4
LT		 626 fbcon_clear_margins(vc, 0);
627 update_screen(vc);
628 }
629
630 if (save) {
631 q = (unsigned short *) (vc->vc_origin +
632 vc->vc_size_row *
633 rows);
634 scr_memcpyw(q, save, logo_lines * new_cols * 2);
635 vc->vc_y += logo_lines;
636 vc->vc_pos += logo_lines * vc->vc_size_row;
637 kfree(save);
638 }
639
640 if (logo_lines > vc->vc_bottom) {
641 logo_shown = FBCON_LOGO_CANSHOW;
642 printk(KERN_INFO
643 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
644 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
645 logo_shown = FBCON_LOGO_DRAW;
646 vc->vc_top = logo_lines;
647 }
648}
70802c60 649#endif /* MODULE */
1da177e4
LT		 650
651#ifdef CONFIG_FB_TILEBLITTING
b73deed3 652static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 653{
654 struct fbcon_ops *ops = info->fbcon_par;
655
b73deed3 656 ops->p = &fb_display[vc->vc_num];
ab767201 657
1da177e4 658 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 659 fbcon_set_tileops(vc, info);
e4fc2761 660 else {
b73deed3 661 fbcon_set_rotation(info);
1da177e4 662 fbcon_set_bitops(ops);
e4fc2761 663 }
1da177e4 664}
38b4982c
AD		 665
666static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
667{
668 int err = 0;
669
670 if (info->flags & FBINFO_MISC_TILEBLITTING &&
671 info->tileops->fb_get_tilemax(info) < charcount)
672 err = 1;
673
674 return err;
675}
1da177e4 676#else
b73deed3 677static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 678{
679 struct fbcon_ops *ops = info->fbcon_par;
680
681 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 682 ops->p = &fb_display[vc->vc_num];
683 fbcon_set_rotation(info);
1da177e4
LT		 684 fbcon_set_bitops(ops);
685}
38b4982c
AD		 686
687static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
688{
689 return 0;
690}
691
1da177e4
LT		 692#endif /* CONFIG_MISC_TILEBLITTING */
693
694
695static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
696 int unit, int oldidx)
697{
698 struct fbcon_ops *ops = NULL;
699 int err = 0;
700
701 if (!try_module_get(info->fbops->owner))
702 err = -ENODEV;
703
704 if (!err && info->fbops->fb_open &&
705 info->fbops->fb_open(info, 0))
706 err = -ENODEV;
707
708 if (!err) {
a39bc34e 709 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 710 if (!ops)
711 err = -ENOMEM;
712 }
713
714 if (!err) {
a1e533ec 715 ops->cur_blink_jiffies = HZ / 5;
6c789357 716 ops->info = info;
1da177e4 717 info->fbcon_par = ops;
d1baa4ff
AD		 718
719 if (vc)
720 set_blitting_type(vc, info);
1da177e4
LT		 721 }
722
723 if (err) {
724 con2fb_map[unit] = oldidx;
725 module_put(info->fbops->owner);
726 }
727
728 return err;
729}
730
731static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
732 struct fb_info *newinfo, int unit,
733 int oldidx, int found)
734{
735 struct fbcon_ops *ops = oldinfo->fbcon_par;
0fcf6ada 736 int err = 0, ret;
1da177e4
LT		 737
738 if (oldinfo->fbops->fb_release &&
739 oldinfo->fbops->fb_release(oldinfo, 0)) {
740 con2fb_map[unit] = oldidx;
741 if (!found && newinfo->fbops->fb_release)
742 newinfo->fbops->fb_release(newinfo, 0);
743 if (!found)
744 module_put(newinfo->fbops->owner);
745 err = -ENODEV;
746 }
747
748 if (!err) {
88fb2c6e 749 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 750 kfree(ops->cursor_state.mask);
751 kfree(ops->cursor_data);
7a966fbd 752 kfree(ops->cursor_src);
e4fc2761 753 kfree(ops->fontbuffer);
1da177e4
LT		 754 kfree(oldinfo->fbcon_par);
755 oldinfo->fbcon_par = NULL;
756 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 757 /*
758 If oldinfo and newinfo are driving the same hardware,
759 the fb_release() method of oldinfo may attempt to
760 restore the hardware state. This will leave the
761 newinfo in an undefined state. Thus, a call to
762 fb_set_par() may be needed for the newinfo.
763 */
5f4dc28b 764 if (newinfo && newinfo->fbops->fb_set_par) {
0fcf6ada
FTS		 765 ret = newinfo->fbops->fb_set_par(newinfo);
766
767 if (ret)
768 printk(KERN_ERR "con2fb_release_oldinfo: "
769 "detected unhandled fb_set_par error, "
770 "error code %d\n", ret);
771 }
1da177e4
LT		 772 }
773
774 return err;
775}
776
1da177e4
LT		 777static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
778 int unit, int show_logo)
779{
780 struct fbcon_ops *ops = info->fbcon_par;
0fcf6ada 781 int ret;
1da177e4
LT		 782
783 ops->currcon = fg_console;
784
0fcf6ada
FTS		 785 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
786 ret = info->fbops->fb_set_par(info);
787
788 if (ret)
789 printk(KERN_ERR "con2fb_init_display: detected "
790 "unhandled fb_set_par error, "
791 "error code %d\n", ret);
792 }
1da177e4
LT		 793
794 ops->flags |= FBCON_FLAGS_INIT;
795 ops->graphics = 0;
d1baa4ff 796 fbcon_set_disp(info, &info->var, unit);
1da177e4
LT		 797
798 if (show_logo) {
799 struct vc_data *fg_vc = vc_cons[fg_console].d;
800 struct fb_info *fg_info =
801 registered_fb[con2fb_map[fg_console]];
802
803 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
804 fg_vc->vc_rows, fg_vc->vc_cols,
805 fg_vc->vc_rows);
806 }
807
808 update_screen(vc_cons[fg_console].d);
809}
810
811/**
812 * set_con2fb_map - map console to frame buffer device
813 * @unit: virtual console number to map
814 * @newidx: frame buffer index to map virtual console to
815 * @user: user request
816 *
817 * Maps a virtual console @unit to a frame buffer device
818 * @newidx.
054430e7
DA		 819 *
820 * This should be called with the console lock held.
1da177e4
LT		 821 */
822static int set_con2fb_map(int unit, int newidx, int user)
823{
824 struct vc_data *vc = vc_cons[unit].d;
825 int oldidx = con2fb_map[unit];
826 struct fb_info *info = registered_fb[newidx];
827 struct fb_info *oldinfo = NULL;
828 int found, err = 0;
829
830 if (oldidx == newidx)
831 return 0;
832
32b98bf8 833 if (!info)
e614b18d 834 return -EINVAL;
1da177e4 835
32b98bf8 836 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
1da177e4 837 info_idx = newidx;
054430e7 838 return do_fbcon_takeover(0);
1da177e4
LT		 839 }
840
841 if (oldidx != -1)
842 oldinfo = registered_fb[oldidx];
843
844 found = search_fb_in_map(newidx);
845
1da177e4
LT		 846 con2fb_map[unit] = newidx;
847 if (!err && !found)
848 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
849
850
851 /*
852 * If old fb is not mapped to any of the consoles,
853 * fbcon should release it.
854 */
855 if (!err && oldinfo && !search_fb_in_map(oldidx))
856 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
857 found);
858
859 if (!err) {
860 int show_logo = (fg_console == 0 && !user &&
861 logo_shown != FBCON_LOGO_DONTSHOW);
862
863 if (!found)
88fb2c6e 864 fbcon_add_cursor_timer(info);
1da177e4
LT		 865 con2fb_map_boot[unit] = newidx;
866 con2fb_init_display(vc, info, unit, show_logo);
867 }
868
e614b18d
AD		 869 if (!search_fb_in_map(info_idx))
870 info_idx = newidx;
871
1da177e4
LT		 872 return err;
873}
874
875/*
876 * Low Level Operations
877 */
155957f5 878/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
1da177e4
LT		 879static int var_to_display(struct display *disp,
880 struct fb_var_screeninfo *var,
881 struct fb_info *info)
882{
883 disp->xres_virtual = var->xres_virtual;
884 disp->yres_virtual = var->yres_virtual;
885 disp->bits_per_pixel = var->bits_per_pixel;
886 disp->grayscale = var->grayscale;
887 disp->nonstd = var->nonstd;
888 disp->accel_flags = var->accel_flags;
889 disp->height = var->height;
890 disp->width = var->width;
891 disp->red = var->red;
892 disp->green = var->green;
893 disp->blue = var->blue;
894 disp->transp = var->transp;
895 disp->rotate = var->rotate;
896 disp->mode = fb_match_mode(var, &info->modelist);
897 if (disp->mode == NULL)
898 /* This should not happen */
899 return -EINVAL;
900 return 0;
901}
902
903static void display_to_var(struct fb_var_screeninfo *var,
904 struct display *disp)
905{
906 fb_videomode_to_var(var, disp->mode);
907 var->xres_virtual = disp->xres_virtual;
908 var->yres_virtual = disp->yres_virtual;
909 var->bits_per_pixel = disp->bits_per_pixel;
910 var->grayscale = disp->grayscale;
911 var->nonstd = disp->nonstd;
912 var->accel_flags = disp->accel_flags;
913 var->height = disp->height;
914 var->width = disp->width;
915 var->red = disp->red;
916 var->green = disp->green;
917 var->blue = disp->blue;
918 var->transp = disp->transp;
919 var->rotate = disp->rotate;
920}
921
922static const char *fbcon_startup(void)
923{
924 const char *display_desc = "frame buffer device";
925 struct display *p = &fb_display[fg_console];
926 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 927 const struct font_desc *font = NULL;
1da177e4
LT		 928 struct module *owner;
929 struct fb_info *info = NULL;
930 struct fbcon_ops *ops;
931 int rows, cols;
1da177e4 932
1da177e4
LT		 933 /*
934 * If num_registered_fb is zero, this is a call for the dummy part.
935 * The frame buffer devices weren't initialized yet.
936 */
937 if (!num_registered_fb || info_idx == -1)
938 return display_desc;
939 /*
940 * Instead of blindly using registered_fb[0], we use info_idx, set by
941 * fb_console_init();
942 */
943 info = registered_fb[info_idx];
944 if (!info)
945 return NULL;
946
947 owner = info->fbops->owner;
948 if (!try_module_get(owner))
949 return NULL;
950 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
951 module_put(owner);
952 return NULL;
953 }
954
a39bc34e 955 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 956 if (!ops) {
957 module_put(owner);
958 return NULL;
959 }
960
1da177e4
LT		 961 ops->currcon = -1;
962 ops->graphics = 1;
e4fc2761 963 ops->cur_rotate = -1;
a1e533ec 964 ops->cur_blink_jiffies = HZ / 5;
d447ebf9 965 ops->info = info;
1da177e4 966 info->fbcon_par = ops;
b0d8e409
HG		 967 if (initial_rotation != -1)
968 p->con_rotate = initial_rotation;
969 else
970 p->con_rotate = fbcon_platform_get_rotate(info);
b73deed3 971 set_blitting_type(vc, info);
1da177e4
LT		 972
973 if (info->fix.type != FB_TYPE_TEXT) {
974 if (fbcon_softback_size) {
975 if (!softback_buf) {
976 softback_buf =
977 (unsigned long)
978 kmalloc(fbcon_softback_size,
979 GFP_KERNEL);
980 if (!softback_buf) {
981 fbcon_softback_size = 0;
982 softback_top = 0;
983 }
984 }
985 } else {
986 if (softback_buf) {
987 kfree((void *) softback_buf);
988 softback_buf = 0;
989 softback_top = 0;
990 }
991 }
992 if (softback_buf)
993 softback_in = softback_top = softback_curr =
994 softback_buf;
995 softback_lines = 0;
996 }
997
998 /* Setup default font */
ae128786 999 if (!p->fontdata && !vc->vc_font.data) {
1da177e4
LT		 1000 if (!fontname[0] || !(font = find_font(fontname)))
1001 font = get_default_font(info->var.xres,
2d2699d9
AD		 1002 info->var.yres,
1003 info->pixmap.blit_x,
1004 info->pixmap.blit_y);
1da177e4
LT		 1005 vc->vc_font.width = font->width;
1006 vc->vc_font.height = font->height;
2f4516db 1007 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4 1008 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
ae128786
DA		 1009 } else {
1010 p->fontdata = vc->vc_font.data;
1da177e4
LT		 1011 }
1012
e4fc2761
AD		 1013 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1014 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1015 cols /= vc->vc_font.width;
1016 rows /= vc->vc_font.height;
1da177e4
LT		 1017 vc_resize(vc, cols, rows);
1018
1019 DPRINTK("mode: %s\n", info->fix.id);
1020 DPRINTK("visual: %d\n", info->fix.visual);
1021 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1022 info->var.yres,
1023 info->var.bits_per_pixel);
1024
88fb2c6e 1025 fbcon_add_cursor_timer(info);
e614b18d 1026 fbcon_has_exited = 0;
1da177e4
LT		 1027 return display_desc;
1028}
1029
1030static void fbcon_init(struct vc_data *vc, int init)
1031{
1032 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1033 struct fbcon_ops *ops;
1034 struct vc_data **default_mode = vc->vc_display_fg;
1035 struct vc_data *svc = *default_mode;
1036 struct display *t, *p = &fb_display[vc->vc_num];
1037 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
0fcf6ada 1038 int cap, ret;
1da177e4
LT		 1039
1040 if (info_idx == -1 || info == NULL)
1041 return;
306958e8
AB		 1042
1043 cap = info->flags;
1044
1da177e4
LT		 1045 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1046 (info->fix.type == FB_TYPE_TEXT))
1047 logo = 0;
1048
1da177e4
LT		 1049 if (var_to_display(p, &info->var, info))
1050 return;
1051
d1baa4ff
AD		 1052 if (!info->fbcon_par)
1053 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1054
1da177e4
LT		 1055 /* If we are not the first console on this
1056 fb, copy the font from that console */
e614b18d
AD		 1057 t = &fb_display[fg_console];
1058 if (!p->fontdata) {
1059 if (t->fontdata) {
1060 struct vc_data *fvc = vc_cons[fg_console].d;
1061
1062 vc->vc_font.data = (void *)(p->fontdata =
1063 fvc->vc_font.data);
1064 vc->vc_font.width = fvc->vc_font.width;
1065 vc->vc_font.height = fvc->vc_font.height;
1066 p->userfont = t->userfont;
1067
1068 if (p->userfont)
1069 REFCOUNT(p->fontdata)++;
1070 } else {
1071 const struct font_desc *font = NULL;
1072
1073 if (!fontname[0] || !(font = find_font(fontname)))
1074 font = get_default_font(info->var.xres,
2d2699d9
AD		 1075 info->var.yres,
1076 info->pixmap.blit_x,
1077 info->pixmap.blit_y);
e614b18d
AD		 1078 vc->vc_font.width = font->width;
1079 vc->vc_font.height = font->height;
1080 vc->vc_font.data = (void *)(p->fontdata = font->data);
1081 vc->vc_font.charcount = 256; /* FIXME Need to
1082 support more fonts */
1083 }
1da177e4 1084 }
e614b18d 1085
1da177e4
LT		 1086 if (p->userfont)
1087 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1088
8fd4bd22 1089 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
b8c90945 1090 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1091 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1092 if (charcnt == 256) {
1093 vc->vc_hi_font_mask = 0;
1094 } else {
1095 vc->vc_hi_font_mask = 0x100;
1096 if (vc->vc_can_do_color)
1097 vc->vc_complement_mask <<= 1;
1098 }
1099
1100 if (!*svc->vc_uni_pagedir_loc)
1101 con_set_default_unimap(svc);
1102 if (!*vc->vc_uni_pagedir_loc)
1103 con_copy_unimap(vc, svc);
1104
e4fc2761 1105 ops = info->fbcon_par;
f235f664 1106 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
b0d8e409
HG		 1107 if (initial_rotation != -1)
1108 p->con_rotate = initial_rotation;
1109 else
1110 p->con_rotate = fbcon_platform_get_rotate(info);
b73deed3 1111 set_blitting_type(vc, info);
e4fc2761 1112
1da177e4
LT		 1113 cols = vc->vc_cols;
1114 rows = vc->vc_rows;
e4fc2761
AD		 1115 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1116 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1117 new_cols /= vc->vc_font.width;
1118 new_rows /= vc->vc_font.height;
1da177e4 1119
1da177e4
LT		 1120 /*
1121 * We must always set the mode. The mode of the previous console
1122 * driver could be in the same resolution but we are using different
1123 * hardware so we have to initialize the hardware.
1124 *
1125 * We need to do it in fbcon_init() to prevent screen corruption.
1126 */
6ca8dfd7 1127 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1da177e4 1128 if (info->fbops->fb_set_par &&
0fcf6ada
FTS		 1129 !(ops->flags & FBCON_FLAGS_INIT)) {
1130 ret = info->fbops->fb_set_par(info);
1131
1132 if (ret)
1133 printk(KERN_ERR "fbcon_init: detected "
1134 "unhandled fb_set_par error, "
1135 "error code %d\n", ret);
1136 }
1137
1da177e4
LT		 1138 ops->flags |= FBCON_FLAGS_INIT;
1139 }
1140
1141 ops->graphics = 0;
1142
1143 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1144 !(cap & FBINFO_HWACCEL_DISABLED))
1145 p->scrollmode = SCROLL_MOVE;
1146 else /* default to something safe */
1147 p->scrollmode = SCROLL_REDRAW;
1148
1149 /*
1150 * ++guenther: console.c:vc_allocate() relies on initializing
1151 * vc_{cols,rows}, but we must not set those if we are only
1152 * resizing the console.
1153 */
0035fe00 1154 if (init) {
1da177e4
LT		 1155 vc->vc_cols = new_cols;
1156 vc->vc_rows = new_rows;
0035fe00
JW		 1157 } else
1158 vc_resize(vc, new_cols, new_rows);
1da177e4
LT		 1159
1160 if (logo)
1161 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1162
4d9c5b6e
AD		 1163 if (vc == svc && softback_buf)
1164 fbcon_update_softback(vc);
e4fc2761 1165
b73deed3 1166 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1167 ops->rotate = FB_ROTATE_UR;
b73deed3 1168 set_blitting_type(vc, info);
e4fc2761
AD		 1169 }
1170
1a37d5f5 1171 ops->p = &fb_display[fg_console];
1da177e4
LT		 1172}
1173
ae128786 1174static void fbcon_free_font(struct display *p, bool freefont)
e614b18d 1175{
ae128786 1176 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
e614b18d
AD		 1177 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1178 p->fontdata = NULL;
1179 p->userfont = 0;
1180}
1181
8aac7f34
TI		 1182static void set_vc_hi_font(struct vc_data *vc, bool set);
1183
1da177e4
LT		 1184static void fbcon_deinit(struct vc_data *vc)
1185{
1186 struct display *p = &fb_display[vc->vc_num];
e614b18d
AD		 1187 struct fb_info *info;
1188 struct fbcon_ops *ops;
1189 int idx;
ae128786 1190 bool free_font = true;
1da177e4 1191
e614b18d
AD		 1192 idx = con2fb_map[vc->vc_num];
1193
1194 if (idx == -1)
1195 goto finished;
1196
1197 info = registered_fb[idx];
1198
1199 if (!info)
1200 goto finished;
1201
ae128786
DA		 1202 if (info->flags & FBINFO_MISC_FIRMWARE)
1203 free_font = false;
e614b18d
AD		 1204 ops = info->fbcon_par;
1205
1206 if (!ops)
1207 goto finished;
1208
6ca8dfd7 1209 if (con_is_visible(vc))
e614b18d
AD		 1210 fbcon_del_cursor_timer(info);
1211
1212 ops->flags &= ~FBCON_FLAGS_INIT;
1213finished:
1214
ae128786 1215 fbcon_free_font(p, free_font);
e6637d54
MK		 1216 if (free_font)
1217 vc->vc_font.data = NULL;
ae128786 1218
36a8d884 1219 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
8aac7f34
TI		 1220 set_vc_hi_font(vc, false);
1221
e614b18d
AD		 1222 if (!con_is_bound(&fb_con))
1223 fbcon_exit();
1224
1225 return;
1da177e4
LT		 1226}
1227
1228/* ====================================================================== */
1229
1230/* fbcon_XXX routines - interface used by the world
1231 *
1232 * This system is now divided into two levels because of complications
1233 * caused by hardware scrolling. Top level functions:
1234 *
1235 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1236 *
1237 * handles y values in range [0, scr_height-1] that correspond to real
1238 * screen positions. y_wrap shift means that first line of bitmap may be
1239 * anywhere on this display. These functions convert lineoffsets to
1240 * bitmap offsets and deal with the wrap-around case by splitting blits.
1241 *
1242 * fbcon_bmove_physical_8() -- These functions fast implementations
1243 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1244 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1245 *
1246 * WARNING:
1247 *
1248 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1249 * Implies should only really hardware scroll in rows. Only reason for
1250 * restriction is simplicity & efficiency at the moment.
1251 */
1252
1da177e4
LT		 1253static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1254 int width)
1255{
1256 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1257 struct fbcon_ops *ops = info->fbcon_par;
1258
1259 struct display *p = &fb_display[vc->vc_num];
1260 u_int y_break;
1261
1262 if (fbcon_is_inactive(vc, info))
1263 return;
1264
1265 if (!height || !width)
1266 return;
1267
256fc0e5 1268 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
c213ddf3 1269 vc->vc_top = 0;
256fc0e5
KM		 1270 /*
1271 * If the font dimensions are not an integral of the display
1272 * dimensions then the ops->clear below won't end up clearing
1273 * the margins. Call clear_margins here in case the logo
1274 * bitmap stretched into the margin area.
1275 */
1276 fbcon_clear_margins(vc, 0);
1277 }
c213ddf3 1278
1da177e4
LT		 1279 /* Split blits that cross physical y_wrap boundary */
1280
1281 y_break = p->vrows - p->yscroll;
1282 if (sy < y_break && sy + height - 1 >= y_break) {
1283 u_int b = y_break - sy;
1284 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1285 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1286 width);
1287 } else
1288 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1289}
1290
1291static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1292 int count, int ypos, int xpos)
1293{
1294 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1295 struct display *p = &fb_display[vc->vc_num];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1300 get_color(vc, info, scr_readw(s), 1),
1301 get_color(vc, info, scr_readw(s), 0));
1302}
1303
1304static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1305{
1306 unsigned short chr;
1307
1308 scr_writew(c, &chr);
1309 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1310}
1311
1312static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1313{
1314 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1315 struct fbcon_ops *ops = info->fbcon_par;
1316
1317 if (!fbcon_is_inactive(vc, info))
74c1c8b3 1318 ops->clear_margins(vc, info, margin_color, bottom_only);
1da177e4
LT		 1319}
1320
1321static void fbcon_cursor(struct vc_data *vc, int mode)
1322{
1323 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1324 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1325 int y;
1326 int c = scr_readw((u16 *) vc->vc_pos);
1327
2a17d7e8
SD		 1328 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1329
d1e23066 1330 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1da177e4
LT		 1331 return;
1332
a5edce42
TR		 1333 if (vc->vc_cursor_type & 0x10)
1334 fbcon_del_cursor_timer(info);
1335 else
acba9cd0
AD		 1336 fbcon_add_cursor_timer(info);
1337
1da177e4
LT		 1338 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1339 if (mode & CM_SOFTBACK) {
1340 mode &= ~CM_SOFTBACK;
1341 y = softback_lines;
1342 } else {
1343 if (softback_lines)
1344 fbcon_set_origin(vc);
1345 y = 0;
1346 }
1347
b73deed3 1348 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4 1349 get_color(vc, info, c, 0));
1da177e4
LT		 1350}
1351
1352static int scrollback_phys_max = 0;
1353static int scrollback_max = 0;
1354static int scrollback_current = 0;
1355
1da177e4 1356static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 1357 int unit)
1da177e4 1358{
d1baa4ff
AD		 1359 struct display *p, *t;
1360 struct vc_data **default_mode, *vc;
1361 struct vc_data *svc;
e4fc2761 1362 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1363 int rows, cols, charcnt = 256;
1364
d1baa4ff
AD		 1365 p = &fb_display[unit];
1366
1da177e4
LT		 1367 if (var_to_display(p, var, info))
1368 return;
d1baa4ff
AD		 1369
1370 vc = vc_cons[unit].d;
1371
1372 if (!vc)
1373 return;
1374
1375 default_mode = vc->vc_display_fg;
1376 svc = *default_mode;
1da177e4 1377 t = &fb_display[svc->vc_num];
d1baa4ff 1378
1da177e4 1379 if (!vc->vc_font.data) {
2f4516db 1380 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1381 vc->vc_font.width = (*default_mode)->vc_font.width;
1382 vc->vc_font.height = (*default_mode)->vc_font.height;
1383 p->userfont = t->userfont;
1384 if (p->userfont)
1385 REFCOUNT(p->fontdata)++;
1386 }
1387 if (p->userfont)
1388 charcnt = FNTCHARCNT(p->fontdata);
1389
b8c90945
AD		 1390 var->activate = FB_ACTIVATE_NOW;
1391 info->var.activate = var->activate;
e4fc2761
AD		 1392 var->yoffset = info->var.yoffset;
1393 var->xoffset = info->var.xoffset;
b8c90945 1394 fb_set_var(info, var);
e4fc2761 1395 ops->var = info->var;
b8c90945 1396 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1397 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1398 if (charcnt == 256) {
1399 vc->vc_hi_font_mask = 0;
1400 } else {
1401 vc->vc_hi_font_mask = 0x100;
1402 if (vc->vc_can_do_color)
1403 vc->vc_complement_mask <<= 1;
1404 }
1405
1406 if (!*svc->vc_uni_pagedir_loc)
1407 con_set_default_unimap(svc);
1408 if (!*vc->vc_uni_pagedir_loc)
1409 con_copy_unimap(vc, svc);
1410
e4fc2761
AD		 1411 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1412 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1413 cols /= vc->vc_font.width;
1414 rows /= vc->vc_font.height;
1da177e4 1415 vc_resize(vc, cols, rows);
e4fc2761 1416
6ca8dfd7 1417 if (con_is_visible(vc)) {
1da177e4 1418 update_screen(vc);
4d9c5b6e
AD		 1419 if (softback_buf)
1420 fbcon_update_softback(vc);
1da177e4
LT		 1421 }
1422}
1423
1424static __inline__ void ywrap_up(struct vc_data *vc, int count)
1425{
1426 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1427 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1428 struct display *p = &fb_display[vc->vc_num];
1429
1430 p->yscroll += count;
1431 if (p->yscroll >= p->vrows) /* Deal with wrap */
1432 p->yscroll -= p->vrows;
e4fc2761
AD		 1433 ops->var.xoffset = 0;
1434 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1435 ops->var.vmode |= FB_VMODE_YWRAP;
1436 ops->update_start(info);
1da177e4
LT		 1437 scrollback_max += count;
1438 if (scrollback_max > scrollback_phys_max)
1439 scrollback_max = scrollback_phys_max;
1440 scrollback_current = 0;
1441}
1442
1443static __inline__ void ywrap_down(struct vc_data *vc, int count)
1444{
1445 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1446 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1447 struct display *p = &fb_display[vc->vc_num];
1448
1449 p->yscroll -= count;
1450 if (p->yscroll < 0) /* Deal with wrap */
1451 p->yscroll += p->vrows;
e4fc2761
AD		 1452 ops->var.xoffset = 0;
1453 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1454 ops->var.vmode |= FB_VMODE_YWRAP;
1455 ops->update_start(info);
1da177e4
LT		 1456 scrollback_max -= count;
1457 if (scrollback_max < 0)
1458 scrollback_max = 0;
1459 scrollback_current = 0;
1460}
1461
1462static __inline__ void ypan_up(struct vc_data *vc, int count)
1463{
1464 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1465 struct display *p = &fb_display[vc->vc_num];
1466 struct fbcon_ops *ops = info->fbcon_par;
1467
1468 p->yscroll += count;
1469 if (p->yscroll > p->vrows - vc->vc_rows) {
1470 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1471 0, 0, 0, vc->vc_rows, vc->vc_cols);
1472 p->yscroll -= p->vrows - vc->vc_rows;
1473 }
e4fc2761
AD		 1474
1475 ops->var.xoffset = 0;
1476 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1477 ops->var.vmode &= ~FB_VMODE_YWRAP;
1478 ops->update_start(info);
1da177e4
LT		 1479 fbcon_clear_margins(vc, 1);
1480 scrollback_max += count;
1481 if (scrollback_max > scrollback_phys_max)
1482 scrollback_max = scrollback_phys_max;
1483 scrollback_current = 0;
1484}
1485
1486static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1487{
1488 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1489 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1490 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1491
1492 p->yscroll += count;
a39bc34e 1493
1da177e4
LT		 1494 if (p->yscroll > p->vrows - vc->vc_rows) {
1495 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1496 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1497 }
e4fc2761
AD		 1498
1499 ops->var.xoffset = 0;
1500 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1501 ops->var.vmode &= ~FB_VMODE_YWRAP;
1502 ops->update_start(info);
1da177e4
LT		 1503 fbcon_clear_margins(vc, 1);
1504 scrollback_max += count;
1505 if (scrollback_max > scrollback_phys_max)
1506 scrollback_max = scrollback_phys_max;
1507 scrollback_current = 0;
1508}
1509
1510static __inline__ void ypan_down(struct vc_data *vc, int count)
1511{
1512 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1513 struct display *p = &fb_display[vc->vc_num];
1514 struct fbcon_ops *ops = info->fbcon_par;
1515
1516 p->yscroll -= count;
1517 if (p->yscroll < 0) {
1518 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1519 0, vc->vc_rows, vc->vc_cols);
1520 p->yscroll += p->vrows - vc->vc_rows;
1521 }
e4fc2761
AD		 1522
1523 ops->var.xoffset = 0;
1524 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1525 ops->var.vmode &= ~FB_VMODE_YWRAP;
1526 ops->update_start(info);
1da177e4
LT		 1527 fbcon_clear_margins(vc, 1);
1528 scrollback_max -= count;
1529 if (scrollback_max < 0)
1530 scrollback_max = 0;
1531 scrollback_current = 0;
1532}
1533
1534static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1535{
1536 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1537 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1538 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1539
1540 p->yscroll -= count;
a39bc34e 1541
1da177e4
LT		 1542 if (p->yscroll < 0) {
1543 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1544 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1545 }
e4fc2761
AD		 1546
1547 ops->var.xoffset = 0;
1548 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1549 ops->var.vmode &= ~FB_VMODE_YWRAP;
1550 ops->update_start(info);
1da177e4
LT		 1551 fbcon_clear_margins(vc, 1);
1552 scrollback_max -= count;
1553 if (scrollback_max < 0)
1554 scrollback_max = 0;
1555 scrollback_current = 0;
1556}
1557
1558static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1559 long delta)
1560{
1561 int count = vc->vc_rows;
1562 unsigned short *d, *s;
1563 unsigned long n;
1564 int line = 0;
1565
1566 d = (u16 *) softback_curr;
1567 if (d == (u16 *) softback_in)
1568 d = (u16 *) vc->vc_origin;
1569 n = softback_curr + delta * vc->vc_size_row;
1570 softback_lines -= delta;
1571 if (delta < 0) {
1572 if (softback_curr < softback_top && n < softback_buf) {
1573 n += softback_end - softback_buf;
1574 if (n < softback_top) {
1575 softback_lines -=
1576 (softback_top - n) / vc->vc_size_row;
1577 n = softback_top;
1578 }
1579 } else if (softback_curr >= softback_top
1580 && n < softback_top) {
1581 softback_lines -=
1582 (softback_top - n) / vc->vc_size_row;
1583 n = softback_top;
1584 }
1585 } else {
1586 if (softback_curr > softback_in && n >= softback_end) {
1587 n += softback_buf - softback_end;
1588 if (n > softback_in) {
1589 n = softback_in;
1590 softback_lines = 0;
1591 }
1592 } else if (softback_curr <= softback_in && n > softback_in) {
1593 n = softback_in;
1594 softback_lines = 0;
1595 }
1596 }
1597 if (n == softback_curr)
1598 return;
1599 softback_curr = n;
1600 s = (u16 *) softback_curr;
1601 if (s == (u16 *) softback_in)
1602 s = (u16 *) vc->vc_origin;
1603 while (count--) {
1604 unsigned short *start;
1605 unsigned short *le;
1606 unsigned short c;
1607 int x = 0;
1608 unsigned short attr = 1;
1609
1610 start = s;
1611 le = advance_row(s, 1);
1612 do {
1613 c = scr_readw(s);
1614 if (attr != (c & 0xff00)) {
1615 attr = c & 0xff00;
1616 if (s > start) {
1617 fbcon_putcs(vc, start, s - start,
1618 line, x);
1619 x += s - start;
1620 start = s;
1621 }
1622 }
1623 if (c == scr_readw(d)) {
1624 if (s > start) {
1625 fbcon_putcs(vc, start, s - start,
1626 line, x);
1627 x += s - start + 1;
1628 start = s + 1;
1629 } else {
1630 x++;
1631 start++;
1632 }
1633 }
1634 s++;
1635 d++;
1636 } while (s < le);
1637 if (s > start)
1638 fbcon_putcs(vc, start, s - start, line, x);
1639 line++;
1640 if (d == (u16 *) softback_end)
1641 d = (u16 *) softback_buf;
1642 if (d == (u16 *) softback_in)
1643 d = (u16 *) vc->vc_origin;
1644 if (s == (u16 *) softback_end)
1645 s = (u16 *) softback_buf;
1646 if (s == (u16 *) softback_in)
1647 s = (u16 *) vc->vc_origin;
1648 }
1649}
1650
1651static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1652 int line, int count, int dy)
1653{
1654 unsigned short *s = (unsigned short *)
1655 (vc->vc_origin + vc->vc_size_row * line);
1656
1657 while (count--) {
1658 unsigned short *start = s;
1659 unsigned short *le = advance_row(s, 1);
1660 unsigned short c;
1661 int x = 0;
1662 unsigned short attr = 1;
1663
1664 do {
1665 c = scr_readw(s);
1666 if (attr != (c & 0xff00)) {
1667 attr = c & 0xff00;
1668 if (s > start) {
1669 fbcon_putcs(vc, start, s - start,
1670 dy, x);
1671 x += s - start;
1672 start = s;
1673 }
1674 }
1675 console_conditional_schedule();
1676 s++;
1677 } while (s < le);
1678 if (s > start)
1679 fbcon_putcs(vc, start, s - start, dy, x);
1680 console_conditional_schedule();
1681 dy++;
1682 }
1683}
1684
bad07ff7
KH		 1685static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1686 struct display *p, int line, int count, int ycount)
1687{
1688 int offset = ycount * vc->vc_cols;
1689 unsigned short *d = (unsigned short *)
1690 (vc->vc_origin + vc->vc_size_row * line);
1691 unsigned short *s = d + offset;
1692 struct fbcon_ops *ops = info->fbcon_par;
1693
1694 while (count--) {
1695 unsigned short *start = s;
1696 unsigned short *le = advance_row(s, 1);
1697 unsigned short c;
1698 int x = 0;
1699
1700 do {
1701 c = scr_readw(s);
1702
1703 if (c == scr_readw(d)) {
1704 if (s > start) {
1705 ops->bmove(vc, info, line + ycount, x,
1706 line, x, 1, s-start);
1707 x += s - start + 1;
1708 start = s + 1;
1709 } else {
1710 x++;
1711 start++;
1712 }
1713 }
1714
1715 scr_writew(c, d);
1716 console_conditional_schedule();
1717 s++;
1718 d++;
1719 } while (s < le);
1720 if (s > start)
1721 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1722 s-start);
1723 console_conditional_schedule();
1724 if (ycount > 0)
1725 line++;
1726 else {
1727 line--;
1728 /* NOTE: We subtract two lines from these pointers */
1729 s -= vc->vc_size_row;
1730 d -= vc->vc_size_row;
1731 }
1732 }
1733}
1734
1da177e4
LT		 1735static void fbcon_redraw(struct vc_data *vc, struct display *p,
1736 int line, int count, int offset)
1737{
1738 unsigned short *d = (unsigned short *)
1739 (vc->vc_origin + vc->vc_size_row * line);
1740 unsigned short *s = d + offset;
1741
1742 while (count--) {
1743 unsigned short *start = s;
1744 unsigned short *le = advance_row(s, 1);
1745 unsigned short c;
1746 int x = 0;
1747 unsigned short attr = 1;
1748
1749 do {
1750 c = scr_readw(s);
1751 if (attr != (c & 0xff00)) {
1752 attr = c & 0xff00;
1753 if (s > start) {
1754 fbcon_putcs(vc, start, s - start,
1755 line, x);
1756 x += s - start;
1757 start = s;
1758 }
1759 }
1760 if (c == scr_readw(d)) {
1761 if (s > start) {
1762 fbcon_putcs(vc, start, s - start,
1763 line, x);
1764 x += s - start + 1;
1765 start = s + 1;
1766 } else {
1767 x++;
1768 start++;
1769 }
1770 }
1771 scr_writew(c, d);
1772 console_conditional_schedule();
1773 s++;
1774 d++;
1775 } while (s < le);
1776 if (s > start)
1777 fbcon_putcs(vc, start, s - start, line, x);
1778 console_conditional_schedule();
1779 if (offset > 0)
1780 line++;
1781 else {
1782 line--;
1783 /* NOTE: We subtract two lines from these pointers */
1784 s -= vc->vc_size_row;
1785 d -= vc->vc_size_row;
1786 }
1787 }
1788}
1789
1790static inline void fbcon_softback_note(struct vc_data *vc, int t,
1791 int count)
1792{
1793 unsigned short *p;
1794
1795 if (vc->vc_num != fg_console)
1796 return;
1797 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1798
1799 while (count) {
1800 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1801 count--;
1802 p = advance_row(p, 1);
1803 softback_in += vc->vc_size_row;
1804 if (softback_in == softback_end)
1805 softback_in = softback_buf;
1806 if (softback_in == softback_top) {
1807 softback_top += vc->vc_size_row;
1808 if (softback_top == softback_end)
1809 softback_top = softback_buf;
1810 }
1811 }
1812 softback_curr = softback_in;
1813}
1814
d705ff38
JS		 1815static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1816 enum con_scroll dir, unsigned int count)
1da177e4
LT		 1817{
1818 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1819 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1820 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1821
1822 if (fbcon_is_inactive(vc, info))
d705ff38 1823 return true;
1da177e4
LT		 1824
1825 fbcon_cursor(vc, CM_ERASE);
1826
1827 /*
1828 * ++Geert: Only use ywrap/ypan if the console is in text mode
1829 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1830 * whole screen (prevents flicker).
1831 */
1832
1833 switch (dir) {
1834 case SM_UP:
1835 if (count > vc->vc_rows) /* Maximum realistic size */
1836 count = vc->vc_rows;
1837 if (softback_top)
1838 fbcon_softback_note(vc, t, count);
1839 if (logo_shown >= 0)
1840 goto redraw_up;
1841 switch (p->scrollmode) {
1842 case SCROLL_MOVE:
bad07ff7
KH		 1843 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1844 count);
1845 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1846 scr_memsetw((unsigned short *) (vc->vc_origin +
1847 vc->vc_size_row *
1848 (b - count)),
93f78da4 1849 vc->vc_video_erase_char,
bad07ff7 1850 vc->vc_size_row * count);
d705ff38 1851 return true;
1da177e4
LT		 1852 break;
1853
1854 case SCROLL_WRAP_MOVE:
1855 if (b - t - count > 3 * vc->vc_rows >> 2) {
1856 if (t > 0)
1857 fbcon_bmove(vc, 0, 0, count, 0, t,
1858 vc->vc_cols);
1859 ywrap_up(vc, count);
1860 if (vc->vc_rows - b > 0)
1861 fbcon_bmove(vc, b - count, 0, b, 0,
1862 vc->vc_rows - b,
1863 vc->vc_cols);
1864 } else if (info->flags & FBINFO_READS_FAST)
1865 fbcon_bmove(vc, t + count, 0, t, 0,
1866 b - t - count, vc->vc_cols);
1867 else
1868 goto redraw_up;
1869 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1870 break;
1871
1872 case SCROLL_PAN_REDRAW:
1873 if ((p->yscroll + count <=
1874 2 * (p->vrows - vc->vc_rows))
1875 && ((!scroll_partial && (b - t == vc->vc_rows))
1876 || (scroll_partial
1877 && (b - t - count >
1878 3 * vc->vc_rows >> 2)))) {
1879 if (t > 0)
1880 fbcon_redraw_move(vc, p, 0, t, count);
1881 ypan_up_redraw(vc, t, count);
1882 if (vc->vc_rows - b > 0)
26e780e8 1883 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1884 vc->vc_rows - b, b);
1885 } else
1886 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1887 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1888 break;
1889
1890 case SCROLL_PAN_MOVE:
1891 if ((p->yscroll + count <=
1892 2 * (p->vrows - vc->vc_rows))
1893 && ((!scroll_partial && (b - t == vc->vc_rows))
1894 || (scroll_partial
1895 && (b - t - count >
1896 3 * vc->vc_rows >> 2)))) {
1897 if (t > 0)
1898 fbcon_bmove(vc, 0, 0, count, 0, t,
1899 vc->vc_cols);
1900 ypan_up(vc, count);
1901 if (vc->vc_rows - b > 0)
1902 fbcon_bmove(vc, b - count, 0, b, 0,
1903 vc->vc_rows - b,
1904 vc->vc_cols);
1905 } else if (info->flags & FBINFO_READS_FAST)
1906 fbcon_bmove(vc, t + count, 0, t, 0,
1907 b - t - count, vc->vc_cols);
1908 else
1909 goto redraw_up;
1910 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1911 break;
1912
1913 case SCROLL_REDRAW:
1914 redraw_up:
1915 fbcon_redraw(vc, p, t, b - t - count,
1916 count * vc->vc_cols);
1917 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1918 scr_memsetw((unsigned short *) (vc->vc_origin +
1919 vc->vc_size_row *
1920 (b - count)),
93f78da4 1921 vc->vc_video_erase_char,
1da177e4 1922 vc->vc_size_row * count);
d705ff38 1923 return true;
1da177e4
LT		 1924 }
1925 break;
1926
1927 case SM_DOWN:
1928 if (count > vc->vc_rows) /* Maximum realistic size */
1929 count = vc->vc_rows;
e703ecc3
JB		 1930 if (logo_shown >= 0)
1931 goto redraw_down;
1da177e4
LT		 1932 switch (p->scrollmode) {
1933 case SCROLL_MOVE:
bad07ff7
KH		 1934 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1935 -count);
1936 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1937 scr_memsetw((unsigned short *) (vc->vc_origin +
1938 vc->vc_size_row *
1939 t),
93f78da4 1940 vc->vc_video_erase_char,
bad07ff7 1941 vc->vc_size_row * count);
d705ff38 1942 return true;
1da177e4
LT		 1943 break;
1944
1945 case SCROLL_WRAP_MOVE:
1946 if (b - t - count > 3 * vc->vc_rows >> 2) {
1947 if (vc->vc_rows - b > 0)
1948 fbcon_bmove(vc, b, 0, b - count, 0,
1949 vc->vc_rows - b,
1950 vc->vc_cols);
1951 ywrap_down(vc, count);
1952 if (t > 0)
1953 fbcon_bmove(vc, count, 0, 0, 0, t,
1954 vc->vc_cols);
1955 } else if (info->flags & FBINFO_READS_FAST)
1956 fbcon_bmove(vc, t, 0, t + count, 0,
1957 b - t - count, vc->vc_cols);
1958 else
1959 goto redraw_down;
1960 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1961 break;
1962
1963 case SCROLL_PAN_MOVE:
1964 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1965 && ((!scroll_partial && (b - t == vc->vc_rows))
1966 || (scroll_partial
1967 && (b - t - count >
1968 3 * vc->vc_rows >> 2)))) {
1969 if (vc->vc_rows - b > 0)
1970 fbcon_bmove(vc, b, 0, b - count, 0,
1971 vc->vc_rows - b,
1972 vc->vc_cols);
1973 ypan_down(vc, count);
1974 if (t > 0)
1975 fbcon_bmove(vc, count, 0, 0, 0, t,
1976 vc->vc_cols);
1977 } else if (info->flags & FBINFO_READS_FAST)
1978 fbcon_bmove(vc, t, 0, t + count, 0,
1979 b - t - count, vc->vc_cols);
1980 else
1981 goto redraw_down;
1982 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1983 break;
1984
1985 case SCROLL_PAN_REDRAW:
1986 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1987 && ((!scroll_partial && (b - t == vc->vc_rows))
1988 || (scroll_partial
1989 && (b - t - count >
1990 3 * vc->vc_rows >> 2)))) {
1991 if (vc->vc_rows - b > 0)
1992 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1993 b - count);
1994 ypan_down_redraw(vc, t, count);
1995 if (t > 0)
1996 fbcon_redraw_move(vc, p, count, t, 0);
1997 } else
1998 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1999 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2000 break;
2001
2002 case SCROLL_REDRAW:
2003 redraw_down:
2004 fbcon_redraw(vc, p, b - 1, b - t - count,
2005 -count * vc->vc_cols);
2006 fbcon_clear(vc, t, 0, count, vc->vc_cols);
2007 scr_memsetw((unsigned short *) (vc->vc_origin +
2008 vc->vc_size_row *
2009 t),
93f78da4 2010 vc->vc_video_erase_char,
1da177e4 2011 vc->vc_size_row * count);
d705ff38 2012 return true;
1da177e4
LT		 2013 }
2014 }
d705ff38 2015 return false;
1da177e4
LT		 2016}
2017
2018
2019static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2020 int height, int width)
2021{
2022 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2023 struct display *p = &fb_display[vc->vc_num];
2024
2025 if (fbcon_is_inactive(vc, info))
2026 return;
2027
2028 if (!width || !height)
2029 return;
2030
2031 /* Split blits that cross physical y_wrap case.
2032 * Pathological case involves 4 blits, better to use recursive
2033 * code rather than unrolled case
2034 *
2035 * Recursive invocations don't need to erase the cursor over and
2036 * over again, so we use fbcon_bmove_rec()
2037 */
2038 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2039 p->vrows - p->yscroll);
2040}
2041
2042static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2043 int dy, int dx, int height, int width, u_int y_break)
2044{
2045 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2046 struct fbcon_ops *ops = info->fbcon_par;
2047 u_int b;
2048
2049 if (sy < y_break && sy + height > y_break) {
2050 b = y_break - sy;
2051 if (dy < sy) { /* Avoid trashing self */
2052 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2053 y_break);
2054 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2055 height - b, width, y_break);
2056 } else {
2057 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2058 height - b, width, y_break);
2059 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2060 y_break);
2061 }
2062 return;
2063 }
2064
2065 if (dy < y_break && dy + height > y_break) {
2066 b = y_break - dy;
2067 if (dy < sy) { /* Avoid trashing self */
2068 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2069 y_break);
2070 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2071 height - b, width, y_break);
2072 } else {
2073 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2074 height - b, width, y_break);
2075 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2076 y_break);
2077 }
2078 return;
2079 }
2080 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2081 height, width);
2082}
2083
def1be2d 2084static void updatescrollmode(struct display *p,
e4fc2761 2085 struct fb_info *info,
1da177e4
LT		 2086 struct vc_data *vc)
2087{
e4fc2761 2088 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2089 int fh = vc->vc_font.height;
2090 int cap = info->flags;
e4fc2761
AD		 2091 u16 t = 0;
2092 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2093 info->fix.xpanstep);
2094 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2095 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2096 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2097 info->var.xres_virtual);
2098 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2099 divides(ypan, vc->vc_font.height) && vyres > yres;
2100 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2101 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 2102 divides(vc->vc_font.height, vyres) &&
2103 divides(vc->vc_font.height, yres);
1da177e4 2104 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 2105 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2106 !(cap & FBINFO_HWACCEL_DISABLED);
2107 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2108 !(cap & FBINFO_HWACCEL_DISABLED);
2109
2110 p->vrows = vyres/fh;
2111 if (yres > (fh * (vc->vc_rows + 1)))
2112 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2113 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 2114 p->vrows--;
2115
2116 if (good_wrap || good_pan) {
2117 if (reading_fast || fast_copyarea)
e4fc2761
AD		 2118 p->scrollmode = good_wrap ?
2119 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 2120 else
2121 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2122 SCROLL_PAN_REDRAW;
2123 } else {
2124 if (reading_fast || (fast_copyarea && !fast_imageblit))
2125 p->scrollmode = SCROLL_MOVE;
2126 else
2127 p->scrollmode = SCROLL_REDRAW;
2128 }
2129}
2130
2131static int fbcon_resize(struct vc_data *vc, unsigned int width,
e400b6ec 2132 unsigned int height, unsigned int user)
1da177e4
LT		 2133{
2134 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2135 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2136 struct display *p = &fb_display[vc->vc_num];
2137 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2138 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2139
2140 virt_w = FBCON_SWAP(ops->rotate, width, height);
2141 virt_h = FBCON_SWAP(ops->rotate, height, width);
2142 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2143 vc->vc_font.height);
2144 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2145 vc->vc_font.width);
2146 var.xres = virt_w * virt_fw;
2147 var.yres = virt_h * virt_fh;
1da177e4
LT		 2148 x_diff = info->var.xres - var.xres;
2149 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2150 if (x_diff < 0 || x_diff > virt_fw ||
2151 y_diff < 0 || y_diff > virt_fh) {
9791d763 2152 const struct fb_videomode *mode;
1da177e4
LT		 2153
2154 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2155 mode = fb_find_best_mode(&var, &info->modelist);
2156 if (mode == NULL)
2157 return -EINVAL;
3084a895 2158 display_to_var(&var, p);
1da177e4 2159 fb_videomode_to_var(&var, mode);
3084a895 2160
e4fc2761 2161 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2162 return -EINVAL;
1da177e4
LT		 2163
2164 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
6ca8dfd7 2165 if (con_is_visible(vc)) {
1da177e4
LT		 2166 var.activate = FB_ACTIVATE_NOW |
2167 FB_ACTIVATE_FORCE;
2168 fb_set_var(info, &var);
2169 }
2170 var_to_display(p, &info->var, info);
e4fc2761 2171 ops->var = info->var;
1da177e4
LT		 2172 }
2173 updatescrollmode(p, info, vc);
2174 return 0;
2175}
2176
2177static int fbcon_switch(struct vc_data *vc)
2178{
88fb2c6e 2179 struct fb_info *info, *old_info = NULL;
e4fc2761 2180 struct fbcon_ops *ops;
1da177e4
LT		 2181 struct display *p = &fb_display[vc->vc_num];
2182 struct fb_var_screeninfo var;
0fcf6ada 2183 int i, ret, prev_console, charcnt = 256;
1da177e4
LT		 2184
2185 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2186 ops = info->fbcon_par;
1da177e4
LT		 2187
2188 if (softback_top) {
1da177e4
LT		 2189 if (softback_lines)
2190 fbcon_set_origin(vc);
2191 softback_top = softback_curr = softback_in = softback_buf;
2192 softback_lines = 0;
4d9c5b6e 2193 fbcon_update_softback(vc);
1da177e4
LT		 2194 }
2195
2196 if (logo_shown >= 0) {
2197 struct vc_data *conp2 = vc_cons[logo_shown].d;
2198
2199 if (conp2->vc_top == logo_lines
2200 && conp2->vc_bottom == conp2->vc_rows)
2201 conp2->vc_top = 0;
2202 logo_shown = FBCON_LOGO_CANSHOW;
2203 }
2204
e4fc2761 2205 prev_console = ops->currcon;
88fb2c6e
AD		 2206 if (prev_console != -1)
2207 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2208 /*
2209 * FIXME: If we have multiple fbdev's loaded, we need to
2210 * update all info->currcon. Perhaps, we can place this
2211 * in a centralized structure, but this might break some
2212 * drivers.
2213 *
2214 * info->currcon = vc->vc_num;
2215 */
2216 for (i = 0; i < FB_MAX; i++) {
2217 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2218 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2219
e4fc2761 2220 o->currcon = vc->vc_num;
1da177e4
LT		 2221 }
2222 }
2223 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2224 display_to_var(&var, p);
2225 var.activate = FB_ACTIVATE_NOW;
2226
2227 /*
2228 * make sure we don't unnecessarily trip the memcmp()
2229 * in fb_set_var()
2230 */
2231 info->var.activate = var.activate;
10732c35 2232 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
1da177e4 2233 fb_set_var(info, &var);
e4fc2761 2234 ops->var = info->var;
1da177e4 2235
39942fd8
KP		 2236 if (old_info != NULL && (old_info != info ||
2237 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
0fcf6ada
FTS		 2238 if (info->fbops->fb_set_par) {
2239 ret = info->fbops->fb_set_par(info);
2240
2241 if (ret)
2242 printk(KERN_ERR "fbcon_switch: detected "
2243 "unhandled fb_set_par error, "
2244 "error code %d\n", ret);
2245 }
a39bc34e 2246
5428b044 2247 if (old_info != info)
a39bc34e 2248 fbcon_del_cursor_timer(old_info);
88fb2c6e 2249 }
1da177e4 2250
212f2639
AD		 2251 if (fbcon_is_inactive(vc, info) ||
2252 ops->blank_state != FB_BLANK_UNBLANK)
2253 fbcon_del_cursor_timer(info);
2254 else
2255 fbcon_add_cursor_timer(info);
2256
b73deed3 2257 set_blitting_type(vc, info);
e4fc2761
AD		 2258 ops->cursor_reset = 1;
2259
b73deed3 2260 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2261 ops->rotate = FB_ROTATE_UR;
b73deed3 2262 set_blitting_type(vc, info);
e4fc2761 2263 }
1da177e4 2264
b8c90945 2265 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2266 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2267
2268 if (p->userfont)
2269 charcnt = FNTCHARCNT(vc->vc_font.data);
2270
2271 if (charcnt > 256)
2272 vc->vc_complement_mask <<= 1;
2273
1da177e4
LT		 2274 updatescrollmode(p, info, vc);
2275
2276 switch (p->scrollmode) {
2277 case SCROLL_WRAP_MOVE:
2278 scrollback_phys_max = p->vrows - vc->vc_rows;
2279 break;
2280 case SCROLL_PAN_MOVE:
2281 case SCROLL_PAN_REDRAW:
2282 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2283 if (scrollback_phys_max < 0)
2284 scrollback_phys_max = 0;
2285 break;
2286 default:
2287 scrollback_phys_max = 0;
2288 break;
2289 }
e4fc2761 2290
1da177e4
LT		 2291 scrollback_max = 0;
2292 scrollback_current = 0;
4e1567d3
AD		 2293
2294 if (!fbcon_is_inactive(vc, info)) {
2295 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2296 ops->update_start(info);
2297 }
2298
1da177e4
LT		 2299 fbcon_set_palette(vc, color_table);
2300 fbcon_clear_margins(vc, 0);
2301
2302 if (logo_shown == FBCON_LOGO_DRAW) {
2303
2304 logo_shown = fg_console;
2305 /* This is protected above by initmem_freed */
9c44e5f6 2306 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2307 update_region(vc,
2308 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2309 vc->vc_size_row * (vc->vc_bottom -
2310 vc->vc_top) / 2);
2311 return 0;
2312 }
2313 return 1;
2314}
2315
2316static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2317 int blank)
2318{
994efacd
RP		 2319 struct fb_event event;
2320
1da177e4
LT		 2321 if (blank) {
2322 unsigned short charmask = vc->vc_hi_font_mask ?
2323 0x1ff : 0xff;
2324 unsigned short oldc;
2325
2326 oldc = vc->vc_video_erase_char;
2327 vc->vc_video_erase_char &= charmask;
2328 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2329 vc->vc_video_erase_char = oldc;
2330 }
994efacd
RP		 2331
2332
513adb58
AR		 2333 if (!lock_fb_info(info))
2334 return;
994efacd
RP		 2335 event.info = info;
2336 event.data = &blank;
2337 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
513adb58 2338 unlock_fb_info(info);
1da177e4
LT		 2339}
2340
2341static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2342{
2343 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2344 struct fbcon_ops *ops = info->fbcon_par;
2345
2346 if (mode_switch) {
2347 struct fb_var_screeninfo var = info->var;
2348
2349 ops->graphics = 1;
2350
2351 if (!blank) {
2352 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2353 fb_set_var(info, &var);
2354 ops->graphics = 0;
e4fc2761 2355 ops->var = info->var;
f5c15d0b 2356 }
1da177e4
LT		 2357 }
2358
2359 if (!fbcon_is_inactive(vc, info)) {
2360 if (ops->blank_state != blank) {
2361 ops->blank_state = blank;
2362 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2363 ops->cursor_flash = (!blank);
2364
bca404af
DES		 2365 if (!(info->flags & FBINFO_MISC_USEREVENT))
2366 if (fb_blank(info, blank))
2367 fbcon_generic_blank(vc, info, blank);
1da177e4
LT		 2368 }
2369
88fb2c6e
AD		 2370 if (!blank)
2371 update_screen(vc);
2372 }
2373
4d8a2d98 2374 if (mode_switch || fbcon_is_inactive(vc, info) ||
212f2639 2375 ops->blank_state != FB_BLANK_UNBLANK)
88fb2c6e 2376 fbcon_del_cursor_timer(info);
212f2639
AD		 2377 else
2378 fbcon_add_cursor_timer(info);
1da177e4 2379
88fb2c6e 2380 return 0;
1da177e4
LT		 2381}
2382
d219adc1
JB		 2383static int fbcon_debug_enter(struct vc_data *vc)
2384{
2385 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2386 struct fbcon_ops *ops = info->fbcon_par;
2387
2388 ops->save_graphics = ops->graphics;
2389 ops->graphics = 0;
2390 if (info->fbops->fb_debug_enter)
2391 info->fbops->fb_debug_enter(info);
2392 fbcon_set_palette(vc, color_table);
2393 return 0;
2394}
2395
2396static int fbcon_debug_leave(struct vc_data *vc)
2397{
2398 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2399 struct fbcon_ops *ops = info->fbcon_par;
2400
2401 ops->graphics = ops->save_graphics;
2402 if (info->fbops->fb_debug_leave)
2403 info->fbops->fb_debug_leave(info);
2404 return 0;
2405}
2406
1da177e4
LT		 2407static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2408{
2409 u8 *fontdata = vc->vc_font.data;
2410 u8 *data = font->data;
2411 int i, j;
2412
2413 font->width = vc->vc_font.width;
2414 font->height = vc->vc_font.height;
2415 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2416 if (!font->data)
2417 return 0;
2418
2419 if (font->width <= 8) {
2420 j = vc->vc_font.height;
2421 for (i = 0; i < font->charcount; i++) {
2422 memcpy(data, fontdata, j);
2423 memset(data + j, 0, 32 - j);
2424 data += 32;
2425 fontdata += j;
2426 }
2427 } else if (font->width <= 16) {
2428 j = vc->vc_font.height * 2;
2429 for (i = 0; i < font->charcount; i++) {
2430 memcpy(data, fontdata, j);
2431 memset(data + j, 0, 64 - j);
2432 data += 64;
2433 fontdata += j;
2434 }
2435 } else if (font->width <= 24) {
2436 for (i = 0; i < font->charcount; i++) {
2437 for (j = 0; j < vc->vc_font.height; j++) {
2438 *data++ = fontdata[0];
2439 *data++ = fontdata[1];
2440 *data++ = fontdata[2];
2441 fontdata += sizeof(u32);
2442 }
2443 memset(data, 0, 3 * (32 - j));
2444 data += 3 * (32 - j);
2445 }
2446 } else {
2447 j = vc->vc_font.height * 4;
2448 for (i = 0; i < font->charcount; i++) {
2449 memcpy(data, fontdata, j);
2450 memset(data + j, 0, 128 - j);
2451 data += 128;
2452 fontdata += j;
2453 }
2454 }
2455 return 0;
2456}
2457
8aac7f34
TI		 2458/* set/clear vc_hi_font_mask and update vc attrs accordingly */
2459static void set_vc_hi_font(struct vc_data *vc, bool set)
1da177e4 2460{
8aac7f34 2461 if (!set) {
1da177e4
LT		 2462 vc->vc_hi_font_mask = 0;
2463 if (vc->vc_can_do_color) {
2464 vc->vc_complement_mask >>= 1;
2465 vc->vc_s_complement_mask >>= 1;
2466 }
2467
2468 /* ++Edmund: reorder the attribute bits */
2469 if (vc->vc_can_do_color) {
2470 unsigned short *cp =
2471 (unsigned short *) vc->vc_origin;
2472 int count = vc->vc_screenbuf_size / 2;
2473 unsigned short c;
2474 for (; count > 0; count--, cp++) {
2475 c = scr_readw(cp);
2476 scr_writew(((c & 0xfe00) >> 1) |
2477 (c & 0xff), cp);
2478 }
2479 c = vc->vc_video_erase_char;
2480 vc->vc_video_erase_char =
2481 ((c & 0xfe00) >> 1) | (c & 0xff);
2482 vc->vc_attr >>= 1;
2483 }
8aac7f34 2484 } else {
1da177e4
LT		 2485 vc->vc_hi_font_mask = 0x100;
2486 if (vc->vc_can_do_color) {
2487 vc->vc_complement_mask <<= 1;
2488 vc->vc_s_complement_mask <<= 1;
2489 }
2490
2491 /* ++Edmund: reorder the attribute bits */
2492 {
2493 unsigned short *cp =
2494 (unsigned short *) vc->vc_origin;
2495 int count = vc->vc_screenbuf_size / 2;
2496 unsigned short c;
2497 for (; count > 0; count--, cp++) {
2498 unsigned short newc;
2499 c = scr_readw(cp);
2500 if (vc->vc_can_do_color)
2501 newc =
2502 ((c & 0xff00) << 1) | (c &
2503 0xff);
2504 else
2505 newc = c & ~0x100;
2506 scr_writew(newc, cp);
2507 }
2508 c = vc->vc_video_erase_char;
2509 if (vc->vc_can_do_color) {
2510 vc->vc_video_erase_char =
2511 ((c & 0xff00) << 1) | (c & 0xff);
2512 vc->vc_attr <<= 1;
93f78da4 2513 } else
1da177e4
LT		 2514 vc->vc_video_erase_char = c & ~0x100;
2515 }
1da177e4 2516 }
8aac7f34
TI		 2517}
2518
2519static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2520 const u8 * data, int userfont)
2521{
2522 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2523 struct fbcon_ops *ops = info->fbcon_par;
2524 struct display *p = &fb_display[vc->vc_num];
2525 int resize;
2526 int cnt;
2527 char *old_data = NULL;
2528
2529 if (con_is_visible(vc) && softback_lines)
2530 fbcon_set_origin(vc);
2531
2532 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2533 if (p->userfont)
2534 old_data = vc->vc_font.data;
2535 if (userfont)
2536 cnt = FNTCHARCNT(data);
2537 else
2538 cnt = 256;
2539 vc->vc_font.data = (void *)(p->fontdata = data);
2540 if ((p->userfont = userfont))
2541 REFCOUNT(data)++;
2542 vc->vc_font.width = w;
2543 vc->vc_font.height = h;
2544 if (vc->vc_hi_font_mask && cnt == 256)
2545 set_vc_hi_font(vc, false);
2546 else if (!vc->vc_hi_font_mask && cnt == 512)
2547 set_vc_hi_font(vc, true);
1da177e4
LT		 2548
2549 if (resize) {
e4fc2761
AD		 2550 int cols, rows;
2551
2552 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2553 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2554 cols /= w;
2555 rows /= h;
2556 vc_resize(vc, cols, rows);
6ca8dfd7 2557 if (con_is_visible(vc) && softback_buf)
4d9c5b6e 2558 fbcon_update_softback(vc);
6ca8dfd7 2559 } else if (con_is_visible(vc)
1da177e4
LT		 2560 && vc->vc_mode == KD_TEXT) {
2561 fbcon_clear_margins(vc, 0);
2562 update_screen(vc);
2563 }
2564
2565 if (old_data && (--REFCOUNT(old_data) == 0))
2566 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2567 return 0;
2568}
2569
2570static int fbcon_copy_font(struct vc_data *vc, int con)
2571{
2572 struct display *od = &fb_display[con];
2573 struct console_font *f = &vc->vc_font;
2574
2575 if (od->fontdata == f->data)
2576 return 0; /* already the same font... */
2577 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2578}
2579
2580/*
2581 * User asked to set font; we are guaranteed that
2582 * a) width and height are in range 1..32
2583 * b) charcount does not exceed 512
2584 * but lets not assume that, since someone might someday want to use larger
2585 * fonts. And charcount of 512 is small for unicode support.
2586 *
2587 * However, user space gives the font in 32 rows , regardless of
2588 * actual font height. So a new API is needed if support for larger fonts
2589 * is ever implemented.
2590 */
2591
2592static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2593{
2d2699d9 2594 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1da177e4
LT		 2595 unsigned charcount = font->charcount;
2596 int w = font->width;
2597 int h = font->height;
2598 int size;
2599 int i, csum;
2600 u8 *new_data, *data = font->data;
2601 int pitch = (font->width+7) >> 3;
2602
2603 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2604 * If not this check should be changed to charcount < 256 */
2605 if (charcount != 256 && charcount != 512)
2606 return -EINVAL;
2607
2d2699d9
AD		 2608 /* Make sure drawing engine can handle the font */
2609 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2610 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2611 return -EINVAL;
38b4982c
AD		 2612
2613 /* Make sure driver can handle the font length */
2614 if (fbcon_invalid_charcount(info, charcount))
2615 return -EINVAL;
2d2699d9 2616
1da177e4
LT		 2617 size = h * pitch * charcount;
2618
2619 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2620
2621 if (!new_data)
2622 return -ENOMEM;
2623
2624 new_data += FONT_EXTRA_WORDS * sizeof(int);
2625 FNTSIZE(new_data) = size;
2626 FNTCHARCNT(new_data) = charcount;
2627 REFCOUNT(new_data) = 0; /* usage counter */
2628 for (i=0; i< charcount; i++) {
2629 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2630 }
2631
2632 /* Since linux has a nice crc32 function use it for counting font
2633 * checksums. */
2634 csum = crc32(0, new_data, size);
2635
2636 FNTSUM(new_data) = csum;
2637 /* Check if the same font is on some other console already */
e614b18d 2638 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2639 struct vc_data *tmp = vc_cons[i].d;
2640
2641 if (fb_display[i].userfont &&
2642 fb_display[i].fontdata &&
2643 FNTSUM(fb_display[i].fontdata) == csum &&
2644 FNTSIZE(fb_display[i].fontdata) == size &&
2645 tmp->vc_font.width == w &&
2646 !memcmp(fb_display[i].fontdata, new_data, size)) {
2647 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2648 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2649 break;
2650 }
2651 }
2652 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2653}
2654
2655static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2656{
2657 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2658 const struct font_desc *f;
1da177e4
LT		 2659
2660 if (!name)
2d2699d9
AD		 2661 f = get_default_font(info->var.xres, info->var.yres,
2662 info->pixmap.blit_x, info->pixmap.blit_y);
1da177e4
LT		 2663 else if (!(f = find_font(name)))
2664 return -ENOENT;
2665
2666 font->width = f->width;
2667 font->height = f->height;
2668 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2669}
2670
2671static u16 palette_red[16];
2672static u16 palette_green[16];
2673static u16 palette_blue[16];
2674
2675static struct fb_cmap palette_cmap = {
2676 0, 16, palette_red, palette_green, palette_blue, NULL
2677};
2678
709280da 2679static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
1da177e4
LT		 2680{
2681 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2682 int i, j, k, depth;
2683 u8 val;
2684
2685 if (fbcon_is_inactive(vc, info))
709280da 2686 return;
1da177e4 2687
6ca8dfd7 2688 if (!con_is_visible(vc))
709280da 2689 return;
1da177e4 2690
b8c90945 2691 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2692 if (depth > 3) {
2693 for (i = j = 0; i < 16; i++) {
2694 k = table[i];
2695 val = vc->vc_palette[j++];
2696 palette_red[k] = (val << 8) | val;
2697 val = vc->vc_palette[j++];
2698 palette_green[k] = (val << 8) | val;
2699 val = vc->vc_palette[j++];
2700 palette_blue[k] = (val << 8) | val;
2701 }
2702 palette_cmap.len = 16;
2703 palette_cmap.start = 0;
2704 /*
2705 * If framebuffer is capable of less than 16 colors,
2706 * use default palette of fbcon.
2707 */
2708 } else
2709 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2710
709280da 2711 fb_set_cmap(&palette_cmap, info);
1da177e4
LT		 2712}
2713
2714static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2715{
2716 unsigned long p;
2717 int line;
2718
2719 if (vc->vc_num != fg_console || !softback_lines)
2720 return (u16 *) (vc->vc_origin + offset);
2721 line = offset / vc->vc_size_row;
2722 if (line >= softback_lines)
2723 return (u16 *) (vc->vc_origin + offset -
2724 softback_lines * vc->vc_size_row);
2725 p = softback_curr + offset;
2726 if (p >= softback_end)
2727 p += softback_buf - softback_end;
2728 return (u16 *) p;
2729}
2730
2731static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2732 int *px, int *py)
2733{
2734 unsigned long ret;
2735 int x, y;
2736
2737 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2738 unsigned long offset = (pos - vc->vc_origin) / 2;
2739
2740 x = offset % vc->vc_cols;
2741 y = offset / vc->vc_cols;
2742 if (vc->vc_num == fg_console)
2743 y += softback_lines;
2744 ret = pos + (vc->vc_cols - x) * 2;
2745 } else if (vc->vc_num == fg_console && softback_lines) {
2746 unsigned long offset = pos - softback_curr;
2747
2748 if (pos < softback_curr)
2749 offset += softback_end - softback_buf;
2750 offset /= 2;
2751 x = offset % vc->vc_cols;
2752 y = offset / vc->vc_cols;
2753 ret = pos + (vc->vc_cols - x) * 2;
2754 if (ret == softback_end)
2755 ret = softback_buf;
2756 if (ret == softback_in)
2757 ret = vc->vc_origin;
2758 } else {
2759 /* Should not happen */
2760 x = y = 0;
2761 ret = vc->vc_origin;
2762 }
2763 if (px)
2764 *px = x;
2765 if (py)
2766 *py = y;
2767 return ret;
2768}
2769
2770/* As we might be inside of softback, we may work with non-contiguous buffer,
2771 that's why we have to use a separate routine. */
2772static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2773{
2774 while (cnt--) {
2775 u16 a = scr_readw(p);
2776 if (!vc->vc_can_do_color)
2777 a ^= 0x0800;
2778 else if (vc->vc_hi_font_mask == 0x100)
2779 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2780 (((a) & 0x0e00) << 4);
2781 else
2782 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2783 (((a) & 0x0700) << 4);
2784 scr_writew(a, p++);
2785 if (p == (u16 *) softback_end)
2786 p = (u16 *) softback_buf;
2787 if (p == (u16 *) softback_in)
2788 p = (u16 *) vc->vc_origin;
2789 }
2790}
2791
97293de9 2792static void fbcon_scrolldelta(struct vc_data *vc, int lines)
1da177e4
LT		 2793{
2794 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2795 struct fbcon_ops *ops = info->fbcon_par;
2c6cc35c 2796 struct display *disp = &fb_display[fg_console];
1da177e4
LT		 2797 int offset, limit, scrollback_old;
2798
2799 if (softback_top) {
2800 if (vc->vc_num != fg_console)
97293de9 2801 return;
1da177e4 2802 if (vc->vc_mode != KD_TEXT || !lines)
97293de9 2803 return;
1da177e4
LT		 2804 if (logo_shown >= 0) {
2805 struct vc_data *conp2 = vc_cons[logo_shown].d;
2806
2807 if (conp2->vc_top == logo_lines
2808 && conp2->vc_bottom == conp2->vc_rows)
2809 conp2->vc_top = 0;
2810 if (logo_shown == vc->vc_num) {
2811 unsigned long p, q;
2812 int i;
2813
2814 p = softback_in;
2815 q = vc->vc_origin +
2816 logo_lines * vc->vc_size_row;
2817 for (i = 0; i < logo_lines; i++) {
2818 if (p == softback_top)
2819 break;
2820 if (p == softback_buf)
2821 p = softback_end;
2822 p -= vc->vc_size_row;
2823 q -= vc->vc_size_row;
2824 scr_memcpyw((u16 *) q, (u16 *) p,
2825 vc->vc_size_row);
2826 }
308af929 2827 softback_in = softback_curr = p;
1da177e4
LT		 2828 update_region(vc, vc->vc_origin,
2829 logo_lines * vc->vc_cols);
2830 }
2831 logo_shown = FBCON_LOGO_CANSHOW;
2832 }
2833 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2c6cc35c 2834 fbcon_redraw_softback(vc, disp, lines);
1da177e4 2835 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
97293de9 2836 return;
1da177e4
LT		 2837 }
2838
2839 if (!scrollback_phys_max)
97293de9 2840 return;
1da177e4
LT		 2841
2842 scrollback_old = scrollback_current;
2843 scrollback_current -= lines;
2844 if (scrollback_current < 0)
2845 scrollback_current = 0;
2846 else if (scrollback_current > scrollback_max)
2847 scrollback_current = scrollback_max;
2848 if (scrollback_current == scrollback_old)
97293de9 2849 return;
1da177e4
LT		 2850
2851 if (fbcon_is_inactive(vc, info))
97293de9 2852 return;
1da177e4
LT		 2853
2854 fbcon_cursor(vc, CM_ERASE);
2855
2c6cc35c
MS		 2856 offset = disp->yscroll - scrollback_current;
2857 limit = disp->vrows;
2858 switch (disp->scrollmode) {
1da177e4
LT		 2859 case SCROLL_WRAP_MOVE:
2860 info->var.vmode |= FB_VMODE_YWRAP;
2861 break;
2862 case SCROLL_PAN_MOVE:
2863 case SCROLL_PAN_REDRAW:
2864 limit -= vc->vc_rows;
2865 info->var.vmode &= ~FB_VMODE_YWRAP;
2866 break;
2867 }
2868 if (offset < 0)
2869 offset += limit;
2870 else if (offset >= limit)
2871 offset -= limit;
e4fc2761
AD		 2872
2873 ops->var.xoffset = 0;
2874 ops->var.yoffset = offset * vc->vc_font.height;
2875 ops->update_start(info);
2876
1da177e4
LT		 2877 if (!scrollback_current)
2878 fbcon_cursor(vc, CM_DRAW);
1da177e4
LT		 2879}
2880
2881static int fbcon_set_origin(struct vc_data *vc)
2882{
2883 if (softback_lines)
2884 fbcon_scrolldelta(vc, softback_lines);
2885 return 0;
2886}
2887
2888static void fbcon_suspended(struct fb_info *info)
2889{
2890 struct vc_data *vc = NULL;
2891 struct fbcon_ops *ops = info->fbcon_par;
2892
2893 if (!ops || ops->currcon < 0)
2894 return;
2895 vc = vc_cons[ops->currcon].d;
2896
2897 /* Clear cursor, restore saved data */
2898 fbcon_cursor(vc, CM_ERASE);
2899}
2900
2901static void fbcon_resumed(struct fb_info *info)
2902{
2903 struct vc_data *vc;
2904 struct fbcon_ops *ops = info->fbcon_par;
2905
2906 if (!ops || ops->currcon < 0)
2907 return;
2908 vc = vc_cons[ops->currcon].d;
2909
2910 update_screen(vc);
2911}
2912
2913static void fbcon_modechanged(struct fb_info *info)
2914{
2915 struct fbcon_ops *ops = info->fbcon_par;
2916 struct vc_data *vc;
2917 struct display *p;
2918 int rows, cols;
2919
2920 if (!ops || ops->currcon < 0)
2921 return;
2922 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2923 if (vc->vc_mode != KD_TEXT ||
2924 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2925 return;
2926
2927 p = &fb_display[vc->vc_num];
b73deed3 2928 set_blitting_type(vc, info);
1da177e4 2929
6ca8dfd7 2930 if (con_is_visible(vc)) {
1da177e4 2931 var_to_display(p, &info->var, info);
e4fc2761
AD		 2932 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2933 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2934 cols /= vc->vc_font.width;
2935 rows /= vc->vc_font.height;
1da177e4
LT		 2936 vc_resize(vc, cols, rows);
2937 updatescrollmode(p, info, vc);
2938 scrollback_max = 0;
2939 scrollback_current = 0;
4e1567d3
AD		 2940
2941 if (!fbcon_is_inactive(vc, info)) {
2942 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2943 ops->update_start(info);
2944 }
2945
1da177e4
LT		 2946 fbcon_set_palette(vc, color_table);
2947 update_screen(vc);
4d9c5b6e
AD		 2948 if (softback_buf)
2949 fbcon_update_softback(vc);
1da177e4
LT		 2950 }
2951}
2952
7726e9e1
AD		 2953static void fbcon_set_all_vcs(struct fb_info *info)
2954{
2955 struct fbcon_ops *ops = info->fbcon_par;
2956 struct vc_data *vc;
2957 struct display *p;
95d67bb1 2958 int i, rows, cols, fg = -1;
7726e9e1
AD		 2959
2960 if (!ops || ops->currcon < 0)
2961 return;
2962
e614b18d 2963 for (i = first_fb_vc; i <= last_fb_vc; i++) {
7726e9e1
AD		 2964 vc = vc_cons[i].d;
2965 if (!vc || vc->vc_mode != KD_TEXT ||
2966 registered_fb[con2fb_map[i]] != info)
2967 continue;
2968
6ca8dfd7 2969 if (con_is_visible(vc)) {
95d67bb1
AD		 2970 fg = i;
2971 continue;
2972 }
2973
7726e9e1 2974 p = &fb_display[vc->vc_num];
b73deed3 2975 set_blitting_type(vc, info);
7726e9e1 2976 var_to_display(p, &info->var, info);
232fb69a
ON		 2977 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2978 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
e4fc2761
AD		 2979 cols /= vc->vc_font.width;
2980 rows /= vc->vc_font.height;
7726e9e1 2981 vc_resize(vc, cols, rows);
7726e9e1 2982 }
04a2fe57 2983
95d67bb1
AD		 2984 if (fg != -1)
2985 fbcon_modechanged(info);
7726e9e1
AD		 2986}
2987
1da177e4
LT		 2988static int fbcon_mode_deleted(struct fb_info *info,
2989 struct fb_videomode *mode)
2990{
2991 struct fb_info *fb_info;
2992 struct display *p;
2993 int i, j, found = 0;
2994
2995 /* before deletion, ensure that mode is not in use */
2996 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997 j = con2fb_map[i];
2998 if (j == -1)
2999 continue;
3000 fb_info = registered_fb[j];
3001 if (fb_info != info)
3002 continue;
3003 p = &fb_display[i];
3004 if (!p || !p->mode)
3005 continue;
3006 if (fb_mode_is_equal(p->mode, mode)) {
3007 found = 1;
3008 break;
3009 }
3010 }
3011 return found;
3012}
3013
cfafca80
JB		 3014#ifdef CONFIG_VT_HW_CONSOLE_BINDING
3015static int fbcon_unbind(void)
3016{
3017 int ret;
3018
e93a9a86 3019 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
cfafca80 3020 fbcon_is_default);
2ddce3fd
IA		 3021
3022 if (!ret)
3023 fbcon_has_console_bind = 0;
3024
cfafca80
JB		 3025 return ret;
3026}
3027#else
3028static inline int fbcon_unbind(void)
3029{
3030 return -EINVAL;
3031}
3032#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3033
054430e7 3034/* called with console_lock held */
cfafca80
JB		 3035static int fbcon_fb_unbind(int idx)
3036{
3037 int i, new_idx = -1, ret = 0;
3038
2ddce3fd
IA		 3039 if (!fbcon_has_console_bind)
3040 return 0;
3041
cfafca80
JB		 3042 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3043 if (con2fb_map[i] != idx &&
3044 con2fb_map[i] != -1) {
a12217df 3045 new_idx = con2fb_map[i];
cfafca80
JB		 3046 break;
3047 }
3048 }
3049
3050 if (new_idx != -1) {
3051 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3052 if (con2fb_map[i] == idx)
3053 set_con2fb_map(i, new_idx, 0);
3054 }
5f4dc28b
KP		 3055 } else {
3056 struct fb_info *info = registered_fb[idx];
3057
3058 /* This is sort of like set_con2fb_map, except it maps
3059 * the consoles to no device and then releases the
3060 * oldinfo to free memory and cancel the cursor blink
3061 * timer. I can imagine this just becoming part of
3062 * set_con2fb_map where new_idx is -1
3063 */
3064 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3065 if (con2fb_map[i] == idx) {
3066 con2fb_map[i] = -1;
3067 if (!search_fb_in_map(idx)) {
3068 ret = con2fb_release_oldinfo(vc_cons[i].d,
3069 info, NULL, i,
3070 idx, 0);
3071 if (ret) {
3072 con2fb_map[i] = idx;
3073 return ret;
3074 }
3075 }
3076 }
3077 }
cfafca80 3078 ret = fbcon_unbind();
5f4dc28b 3079 }
cfafca80
JB		 3080
3081 return ret;
3082}
3083
054430e7 3084/* called with console_lock held */
623e71b0 3085static int fbcon_fb_unregistered(struct fb_info *info)
e614b18d 3086{
66c1ca01 3087 int i, idx;
e614b18d 3088
66c1ca01 3089 idx = info->node;
e614b18d
AD		 3090 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3091 if (con2fb_map[i] == idx)
3092 con2fb_map[i] = -1;
3093 }
3094
3095 if (idx == info_idx) {
3096 info_idx = -1;
3097
3098 for (i = 0; i < FB_MAX; i++) {
3099 if (registered_fb[i] != NULL) {
3100 info_idx = i;
3101 break;
3102 }
3103 }
3104 }
3105
3106 if (info_idx != -1) {
3107 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3108 if (con2fb_map[i] == -1)
3109 con2fb_map[i] = info_idx;
3110 }
3111 }
3112
623e71b0
AD		 3113 if (primary_device == idx)
3114 primary_device = -1;
3115
66c1ca01 3116 if (!num_registered_fb)
e93a9a86 3117 do_unregister_con_driver(&fb_con);
66c1ca01 3118
623e71b0
AD		 3119 return 0;
3120}
3121
054430e7 3122/* called with console_lock held */
6a9ee8af
DA		 3123static void fbcon_remap_all(int idx)
3124{
3125 int i;
3126 for (i = first_fb_vc; i <= last_fb_vc; i++)
3127 set_con2fb_map(i, idx, 0);
3128
3129 if (con_is_bound(&fb_con)) {
3130 printk(KERN_INFO "fbcon: Remapping primary device, "
3131 "fb%i, to tty %i-%i\n", idx,
3132 first_fb_vc + 1, last_fb_vc + 1);
3133 info_idx = idx;
3134 }
3135}
3136
623e71b0 3137#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
afd1db16 3138static void fbcon_select_primary(struct fb_info *info)
623e71b0 3139{
623e71b0
AD		 3140 if (!map_override && primary_device == -1 &&
3141 fb_is_primary_device(info)) {
afd1db16 3142 int i;
623e71b0 3143
afd1db16
AD		 3144 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3145 info->fix.id, info->node);
623e71b0
AD		 3146 primary_device = info->node;
3147
afd1db16 3148 for (i = first_fb_vc; i <= last_fb_vc; i++)
623e71b0 3149 con2fb_map_boot[i] = primary_device;
623e71b0 3150
afd1db16
AD		 3151 if (con_is_bound(&fb_con)) {
3152 printk(KERN_INFO "fbcon: Remapping primary device, "
3153 "fb%i, to tty %i-%i\n", info->node,
3154 first_fb_vc + 1, last_fb_vc + 1);
3155 info_idx = primary_device;
623e71b0 3156 }
623e71b0
AD		 3157 }
3158
623e71b0
AD		 3159}
3160#else
afd1db16 3161static inline void fbcon_select_primary(struct fb_info *info)
623e71b0 3162{
afd1db16 3163 return;
e614b18d 3164}
623e71b0 3165#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
e614b18d 3166
054430e7 3167/* called with console_lock held */
623e71b0 3168static int fbcon_fb_registered(struct fb_info *info)
1da177e4 3169{
66c1ca01 3170 int ret = 0, i, idx;
623e71b0 3171
66c1ca01 3172 idx = info->node;
afd1db16 3173 fbcon_select_primary(info);
1da177e4
LT		 3174
3175 if (info_idx == -1) {
e614b18d 3176 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3177 if (con2fb_map_boot[i] == idx) {
3178 info_idx = idx;
3179 break;
3180 }
3181 }
e614b18d 3182
1da177e4 3183 if (info_idx != -1)
50e244cc 3184 ret = do_fbcon_takeover(1);
1da177e4 3185 } else {
e614b18d 3186 for (i = first_fb_vc; i <= last_fb_vc; i++) {
d1baa4ff 3187 if (con2fb_map_boot[i] == idx)
1da177e4
LT		 3188 set_con2fb_map(i, idx, 0);
3189 }
3190 }
3191
3192 return ret;
3193}
3194
3195static void fbcon_fb_blanked(struct fb_info *info, int blank)
3196{
3197 struct fbcon_ops *ops = info->fbcon_par;
3198 struct vc_data *vc;
3199
3200 if (!ops || ops->currcon < 0)
3201 return;
3202
3203 vc = vc_cons[ops->currcon].d;
3204 if (vc->vc_mode != KD_TEXT ||
3205 registered_fb[con2fb_map[ops->currcon]] != info)
3206 return;
3207
6ca8dfd7 3208 if (con_is_visible(vc)) {
1da177e4
LT		 3209 if (blank)
3210 do_blank_screen(0);
3211 else
3212 do_unblank_screen(0);
3213 }
3214 ops->blank_state = blank;
3215}
3216
3217static void fbcon_new_modelist(struct fb_info *info)
3218{
3219 int i;
3220 struct vc_data *vc;
3221 struct fb_var_screeninfo var;
9791d763 3222 const struct fb_videomode *mode;
1da177e4 3223
e614b18d 3224 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3225 if (registered_fb[con2fb_map[i]] != info)
3226 continue;
3227 if (!fb_display[i].mode)
3228 continue;
3229 vc = vc_cons[i].d;
3230 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 3231 mode = fb_find_nearest_mode(fb_display[i].mode,
3232 &info->modelist);
1da177e4 3233 fb_videomode_to_var(&var, mode);
d1baa4ff 3234 fbcon_set_disp(info, &var, vc->vc_num);
1da177e4
LT		 3235 }
3236}
3237
38a3dc51
AD		 3238static void fbcon_get_requirement(struct fb_info *info,
3239 struct fb_blit_caps *caps)
3240{
3241 struct vc_data *vc;
3242 struct display *p;
38a3dc51
AD		 3243
3244 if (caps->flags) {
167f07f1 3245 int i, charcnt;
38a3dc51
AD		 3246
3247 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3248 vc = vc_cons[i].d;
167f07f1
AD		 3249 if (vc && vc->vc_mode == KD_TEXT &&
3250 info->node == con2fb_map[i]) {
38a3dc51
AD		 3251 p = &fb_display[i];
3252 caps->x |= 1 << (vc->vc_font.width - 1);
3253 caps->y |= 1 << (vc->vc_font.height - 1);
3254 charcnt = (p->userfont) ?
3255 FNTCHARCNT(p->fontdata) : 256;
3256 if (caps->len < charcnt)
3257 caps->len = charcnt;
3258 }
3259 }
3260 } else {
3261 vc = vc_cons[fg_console].d;
3262
167f07f1
AD		 3263 if (vc && vc->vc_mode == KD_TEXT &&
3264 info->node == con2fb_map[fg_console]) {
38a3dc51 3265 p = &fb_display[fg_console];
167f07f1
AD		 3266 caps->x = 1 << (vc->vc_font.width - 1);
3267 caps->y = 1 << (vc->vc_font.height - 1);
3268 caps->len = (p->userfont) ?
38a3dc51 3269 FNTCHARCNT(p->fontdata) : 256;
38a3dc51
AD		 3270 }
3271 }
3272}
3273
66c1ca01 3274static int fbcon_event_notify(struct notifier_block *self,
1da177e4
LT		 3275 unsigned long action, void *data)
3276{
3277 struct fb_event *event = data;
3278 struct fb_info *info = event->info;
3279 struct fb_videomode *mode;
3280 struct fb_con2fbmap *con2fb;
38a3dc51 3281 struct fb_blit_caps *caps;
66c1ca01 3282 int idx, ret = 0;
1da177e4 3283
e614b18d
AD		 3284 /*
3285 * ignore all events except driver registration and deregistration
3286 * if fbcon is not active
3287 */
3288 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3289 action == FB_EVENT_FB_UNREGISTERED))
3290 goto done;
3291
1da177e4
LT		 3292 switch(action) {
3293 case FB_EVENT_SUSPEND:
3294 fbcon_suspended(info);
3295 break;
3296 case FB_EVENT_RESUME:
3297 fbcon_resumed(info);
3298 break;
3299 case FB_EVENT_MODE_CHANGE:
3300 fbcon_modechanged(info);
3301 break;
7726e9e1
AD		 3302 case FB_EVENT_MODE_CHANGE_ALL:
3303 fbcon_set_all_vcs(info);
3304 break;
1da177e4
LT		 3305 case FB_EVENT_MODE_DELETE:
3306 mode = event->data;
3307 ret = fbcon_mode_deleted(info, mode);
3308 break;
cfafca80 3309 case FB_EVENT_FB_UNBIND:
66c1ca01 3310 idx = info->node;
66c1ca01 3311 ret = fbcon_fb_unbind(idx);
cfafca80 3312 break;
1da177e4 3313 case FB_EVENT_FB_REGISTERED:
623e71b0 3314 ret = fbcon_fb_registered(info);
1da177e4 3315 break;
e614b18d 3316 case FB_EVENT_FB_UNREGISTERED:
623e71b0 3317 ret = fbcon_fb_unregistered(info);
e614b18d 3318 break;
1da177e4 3319 case FB_EVENT_SET_CONSOLE_MAP:
054430e7 3320 /* called with console lock held */
1da177e4
LT		 3321 con2fb = event->data;
3322 ret = set_con2fb_map(con2fb->console - 1,
3323 con2fb->framebuffer, 1);
3324 break;
3325 case FB_EVENT_GET_CONSOLE_MAP:
3326 con2fb = event->data;
3327 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3328 break;
3329 case FB_EVENT_BLANK:
3330 fbcon_fb_blanked(info, *(int *)event->data);
3331 break;
3332 case FB_EVENT_NEW_MODELIST:
3333 fbcon_new_modelist(info);
3334 break;
38a3dc51
AD		 3335 case FB_EVENT_GET_REQ:
3336 caps = event->data;
3337 fbcon_get_requirement(info, caps);
3338 break;
6a9ee8af
DA		 3339 case FB_EVENT_REMAP_ALL_CONSOLE:
3340 idx = info->node;
3341 fbcon_remap_all(idx);
3342 break;
1da177e4 3343 }
e614b18d 3344done:
1da177e4
LT		 3345 return ret;
3346}
3347
3348/*
3349 * The console `switch' structure for the frame buffer based console
3350 */
3351
3352static const struct consw fb_con = {
3353 .owner = THIS_MODULE,
3354 .con_startup = fbcon_startup,
3355 .con_init = fbcon_init,
3356 .con_deinit = fbcon_deinit,
3357 .con_clear = fbcon_clear,
3358 .con_putc = fbcon_putc,
3359 .con_putcs = fbcon_putcs,
3360 .con_cursor = fbcon_cursor,
3361 .con_scroll = fbcon_scroll,
1da177e4
LT		 3362 .con_switch = fbcon_switch,
3363 .con_blank = fbcon_blank,
3364 .con_font_set = fbcon_set_font,
3365 .con_font_get = fbcon_get_font,
3366 .con_font_default = fbcon_set_def_font,
3367 .con_font_copy = fbcon_copy_font,
3368 .con_set_palette = fbcon_set_palette,
3369 .con_scrolldelta = fbcon_scrolldelta,
3370 .con_set_origin = fbcon_set_origin,
3371 .con_invert_region = fbcon_invert_region,
3372 .con_screen_pos = fbcon_screen_pos,
3373 .con_getxy = fbcon_getxy,
3374 .con_resize = fbcon_resize,
d219adc1
JB		 3375 .con_debug_enter = fbcon_debug_enter,
3376 .con_debug_leave = fbcon_debug_leave,
1da177e4
LT		 3377};
3378
3379static struct notifier_block fbcon_event_notifier = {
3380 .notifier_call = fbcon_event_notify,
3381};
3382
0c6c1ce0
AD		 3383static ssize_t store_rotate(struct device *device,
3384 struct device_attribute *attr, const char *buf,
3385 size_t count)
9a179176
AD		 3386{
3387 struct fb_info *info;
3388 int rotate, idx;
3389 char **last = NULL;
3390
e614b18d
AD		 3391 if (fbcon_has_exited)
3392 return count;
3393
ac751efa 3394 console_lock();
9a179176
AD		 3395 idx = con2fb_map[fg_console];
3396
3397 if (idx == -1 || registered_fb[idx] == NULL)
3398 goto err;
3399
3400 info = registered_fb[idx];
3401 rotate = simple_strtoul(buf, last, 0);
3402 fbcon_rotate(info, rotate);
3403err:
ac751efa 3404 console_unlock();
9a179176
AD		 3405 return count;
3406}
3407
0c6c1ce0
AD		 3408static ssize_t store_rotate_all(struct device *device,
3409 struct device_attribute *attr,const char *buf,
3410 size_t count)
9a179176
AD		 3411{
3412 struct fb_info *info;
3413 int rotate, idx;
3414 char **last = NULL;
3415
e614b18d
AD		 3416 if (fbcon_has_exited)
3417 return count;
3418
ac751efa 3419 console_lock();
9a179176
AD		 3420 idx = con2fb_map[fg_console];
3421
3422 if (idx == -1 || registered_fb[idx] == NULL)
3423 goto err;
3424
3425 info = registered_fb[idx];
3426 rotate = simple_strtoul(buf, last, 0);
3427 fbcon_rotate_all(info, rotate);
3428err:
ac751efa 3429 console_unlock();
9a179176
AD		 3430 return count;
3431}
3432
0c6c1ce0
AD		 3433static ssize_t show_rotate(struct device *device,
3434 struct device_attribute *attr,char *buf)
9a179176
AD		 3435{
3436 struct fb_info *info;
3437 int rotate = 0, idx;
3438
e614b18d
AD		 3439 if (fbcon_has_exited)
3440 return 0;
3441
ac751efa 3442 console_lock();
9a179176
AD		 3443 idx = con2fb_map[fg_console];
3444
3445 if (idx == -1 || registered_fb[idx] == NULL)
3446 goto err;
3447
3448 info = registered_fb[idx];
3449 rotate = fbcon_get_rotate(info);
3450err:
ac751efa 3451 console_unlock();
9a179176
AD		 3452 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3453}
3454
0c6c1ce0
AD		 3455static ssize_t show_cursor_blink(struct device *device,
3456 struct device_attribute *attr, char *buf)
acba9cd0
AD		 3457{
3458 struct fb_info *info;
3459 struct fbcon_ops *ops;
3460 int idx, blink = -1;
3461
3462 if (fbcon_has_exited)
3463 return 0;
3464
ac751efa 3465 console_lock();
acba9cd0
AD		 3466 idx = con2fb_map[fg_console];
3467
3468 if (idx == -1 || registered_fb[idx] == NULL)
3469 goto err;
3470
3471 info = registered_fb[idx];
3472 ops = info->fbcon_par;
3473
3474 if (!ops)
3475 goto err;
3476
3477 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3478err:
ac751efa 3479 console_unlock();
acba9cd0
AD		 3480 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3481}
3482
0c6c1ce0
AD		 3483static ssize_t store_cursor_blink(struct device *device,
3484 struct device_attribute *attr,
acba9cd0
AD		 3485 const char *buf, size_t count)
3486{
3487 struct fb_info *info;
3488 int blink, idx;
3489 char **last = NULL;
3490
3491 if (fbcon_has_exited)
3492 return count;
3493
ac751efa 3494 console_lock();
acba9cd0
AD		 3495 idx = con2fb_map[fg_console];
3496
3497 if (idx == -1 || registered_fb[idx] == NULL)
3498 goto err;
3499
3500 info = registered_fb[idx];
3501
3502 if (!info->fbcon_par)
3503 goto err;
3504
3505 blink = simple_strtoul(buf, last, 0);
3506
3507 if (blink) {
3508 fbcon_cursor_noblink = 0;
3509 fbcon_add_cursor_timer(info);
3510 } else {
3511 fbcon_cursor_noblink = 1;
3512 fbcon_del_cursor_timer(info);
3513 }
3514
3515err:
ac751efa 3516 console_unlock();
acba9cd0
AD		 3517 return count;
3518}
3519
0c6c1ce0 3520static struct device_attribute device_attrs[] = {
9a179176
AD		 3521 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3522 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
acba9cd0
AD		 3523 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3524 store_cursor_blink),
9a179176
AD		 3525};
3526
0c6c1ce0 3527static int fbcon_init_device(void)
9a179176 3528{
0a727dea
AD		 3529 int i, error = 0;
3530
3531 fbcon_has_sysfs = 1;
3532
0c6c1ce0
AD		 3533 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3534 error = device_create_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3535
3536 if (error)
3537 break;
3538 }
3539
3540 if (error) {
3541 while (--i >= 0)
0c6c1ce0 3542 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3543
3544 fbcon_has_sysfs = 0;
3545 }
9a179176 3546
9a179176
AD		 3547 return 0;
3548}
3549
5428b044 3550static void fbcon_start(void)
1da177e4 3551{
5428b044
AD		 3552 if (num_registered_fb) {
3553 int i;
9a179176 3554
ac751efa 3555 console_lock();
1da177e4 3556
1da177e4
LT		 3557 for (i = 0; i < FB_MAX; i++) {
3558 if (registered_fb[i] != NULL) {
3559 info_idx = i;
3560 break;
3561 }
3562 }
5428b044 3563
e57f35d4 3564 do_fbcon_takeover(0);
ac751efa 3565 console_unlock();
e57f35d4 3566
1da177e4 3567 }
9a179176
AD		 3568}
3569
5428b044 3570static void fbcon_exit(void)
9a179176 3571{
e55186fe
AD		 3572 struct fb_info *info;
3573 int i, j, mapped;
3574
e614b18d
AD		 3575 if (fbcon_has_exited)
3576 return;
3577
e55186fe 3578 kfree((void *)softback_buf);
5428b044 3579 softback_buf = 0UL;
e55186fe
AD		 3580
3581 for (i = 0; i < FB_MAX; i++) {
142092e5 3582 int pending = 0;
beaa4867 3583
e55186fe
AD		 3584 mapped = 0;
3585 info = registered_fb[i];
3586
3587 if (info == NULL)
3588 continue;
3589
142092e5
JP		 3590 if (info->queue.func)
3591 pending = cancel_work_sync(&info->queue);
beaa4867
GL		 3592 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3593 "no"));
3594
e614b18d 3595 for (j = first_fb_vc; j <= last_fb_vc; j++) {
5aa133d6 3596 if (con2fb_map[j] == i) {
e55186fe 3597 mapped = 1;
5aa133d6
WY		 3598 break;
3599 }
e55186fe
AD		 3600 }
3601
3602 if (mapped) {
3603 if (info->fbops->fb_release)
3604 info->fbops->fb_release(info, 0);
3605 module_put(info->fbops->owner);
5428b044
AD		 3606
3607 if (info->fbcon_par) {
e299dd4d
DJ		 3608 struct fbcon_ops *ops = info->fbcon_par;
3609
5428b044 3610 fbcon_del_cursor_timer(info);
e299dd4d 3611 kfree(ops->cursor_src);
46862145 3612 kfree(ops->cursor_state.mask);
5428b044
AD		 3613 kfree(info->fbcon_par);
3614 info->fbcon_par = NULL;
3615 }
3616
3617 if (info->queue.func == fb_flashcursor)
3618 info->queue.func = NULL;
e55186fe
AD		 3619 }
3620 }
3621
e614b18d 3622 fbcon_has_exited = 1;
5428b044
AD		 3623}
3624
6104c370 3625void __init fb_console_init(void)
5428b044
AD		 3626{
3627 int i;
3628
ac751efa 3629 console_lock();
5428b044 3630 fb_register_client(&fbcon_event_notifier);
77997aaa
GKH		 3631 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3632 "fbcon");
5428b044 3633
0c6c1ce0
AD		 3634 if (IS_ERR(fbcon_device)) {
3635 printk(KERN_WARNING "Unable to create device "
5428b044 3636 "for fbcon; errno = %ld\n",
0c6c1ce0
AD		 3637 PTR_ERR(fbcon_device));
3638 fbcon_device = NULL;
5428b044 3639 } else
0c6c1ce0 3640 fbcon_init_device();
5428b044
AD		 3641
3642 for (i = 0; i < MAX_NR_CONSOLES; i++)
3643 con2fb_map[i] = -1;
3644
ac751efa 3645 console_unlock();
5428b044 3646 fbcon_start();
5428b044
AD		 3647}
3648
5428b044
AD		 3649#ifdef MODULE
3650
0c6c1ce0 3651static void __exit fbcon_deinit_device(void)
5428b044
AD		 3652{
3653 int i;
3654
0a727dea 3655 if (fbcon_has_sysfs) {
0c6c1ce0
AD		 3656 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3657 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3658
3659 fbcon_has_sysfs = 0;
3660 }
9a179176
AD		 3661}
3662
6104c370 3663void __exit fb_console_exit(void)
1da177e4 3664{
ac751efa 3665 console_lock();
1da177e4 3666 fb_unregister_client(&fbcon_event_notifier);
0c6c1ce0
AD		 3667 fbcon_deinit_device();
3668 device_destroy(fb_class, MKDEV(0, 0));
e614b18d 3669 fbcon_exit();
70125e76 3670 do_unregister_con_driver(&fb_con);
ac751efa 3671 console_unlock();
1da177e4 3672}
1da177e4 3673#endif
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