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[thirdparty/kernel/stable.git] / drivers / video / console / fbcon.c
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1da177e4
LT		 1/*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59#undef FBCONDEBUG
60
1da177e4
LT		 61#include <linux/module.h>
62#include <linux/types.h>
1da177e4
LT		 63#include <linux/fs.h>
64#include <linux/kernel.h>
65#include <linux/delay.h> /* MSch: for IRQ probe */
1da177e4
LT		 66#include <linux/console.h>
67#include <linux/string.h>
68#include <linux/kd.h>
69#include <linux/slab.h>
70#include <linux/fb.h>
71#include <linux/vt_kern.h>
72#include <linux/selection.h>
73#include <linux/font.h>
74#include <linux/smp.h>
75#include <linux/init.h>
76#include <linux/interrupt.h>
77#include <linux/crc32.h> /* For counting font checksums */
623e71b0 78#include <asm/fb.h>
1da177e4 79#include <asm/irq.h>
1da177e4
LT		 80
81#include "fbcon.h"
82
83#ifdef FBCONDEBUG
5ae12170 84# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
1da177e4
LT		 85#else
86# define DPRINTK(fmt, args...)
87#endif
88
89enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93};
94
ab767201 95static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 96
1da177e4
LT		 97static signed char con2fb_map[MAX_NR_CONSOLES];
98static signed char con2fb_map_boot[MAX_NR_CONSOLES];
49a1d28f 99
1da177e4
LT		 100static int logo_lines;
101/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103static int logo_shown = FBCON_LOGO_CANSHOW;
104/* Software scrollback */
105static int fbcon_softback_size = 32768;
106static unsigned long softback_buf, softback_curr;
107static unsigned long softback_in;
108static unsigned long softback_top, softback_end;
109static int softback_lines;
110/* console mappings */
111static int first_fb_vc;
112static int last_fb_vc = MAX_NR_CONSOLES - 1;
113static int fbcon_is_default = 1;
e614b18d 114static int fbcon_has_exited;
623e71b0 115static int primary_device = -1;
2ddce3fd 116static int fbcon_has_console_bind;
4769a9a5
AD		 117
118#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
623e71b0 119static int map_override;
e614b18d 120
4769a9a5
AD		 121static inline void fbcon_map_override(void)
122{
123 map_override = 1;
124}
125#else
126static inline void fbcon_map_override(void)
127{
128}
129#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
1da177e4
LT		 131/* font data */
132static char fontname[40];
133
134/* current fb_info */
135static int info_idx = -1;
136
e4fc2761 137/* console rotation */
2428e59b 138static int initial_rotation;
0a727dea 139static int fbcon_has_sysfs;
e4fc2761 140
1da177e4
LT		 141static const struct consw fb_con;
142
143#define CM_SOFTBACK (8)
144
145#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
1da177e4
LT		 147static int fbcon_set_origin(struct vc_data *);
148
acba9cd0 149static int fbcon_cursor_noblink;
1da177e4
LT		 150
151#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153/*
154 * Interface used by the world
155 */
156
157static const char *fbcon_startup(void);
158static void fbcon_init(struct vc_data *vc, int init);
159static void fbcon_deinit(struct vc_data *vc);
160static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166static void fbcon_cursor(struct vc_data *vc, int mode);
167static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171static int fbcon_switch(struct vc_data *vc);
172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
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
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
1da177e4
LT		 398static void cursor_timer_handler(unsigned long dev_addr)
399{
400 struct fb_info *info = (struct fb_info *) dev_addr;
401 struct fbcon_ops *ops = info->fbcon_par;
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
AD		 416
417 init_timer(&ops->cursor_timer);
418 ops->cursor_timer.function = cursor_timer_handler;
27a4c827 419 ops->cursor_timer.expires = jiffies + ops->cur_blink_jiffies;
88fb2c6e
AD		 420 ops->cursor_timer.data = (unsigned long ) info;
421 add_timer(&ops->cursor_timer);
422 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
423 }
424}
425
426static void fbcon_del_cursor_timer(struct fb_info *info)
427{
428 struct fbcon_ops *ops = info->fbcon_par;
429
430 if (info->queue.func == fb_flashcursor &&
431 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
432 del_timer_sync(&ops->cursor_timer);
433 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
434 }
435}
436
1da177e4
LT		 437#ifndef MODULE
438static int __init fb_console_setup(char *this_opt)
439{
440 char *options;
441 int i, j;
442
443 if (!this_opt || !*this_opt)
9b41046c 444 return 1;
1da177e4
LT		 445
446 while ((options = strsep(&this_opt, ",")) != NULL) {
37773c4e 447 if (!strncmp(options, "font:", 5)) {
e432964a 448 strlcpy(fontname, options + 5, sizeof(fontname));
37773c4e
MH		 449 continue;
450 }
1da177e4
LT		 451
452 if (!strncmp(options, "scrollback:", 11)) {
453 options += 11;
454 if (*options) {
455 fbcon_softback_size = simple_strtoul(options, &options, 0);
456 if (*options == 'k' || *options == 'K') {
457 fbcon_softback_size *= 1024;
1da177e4 458 }
37773c4e
MH		 459 }
460 continue;
1da177e4
LT		 461 }
462
463 if (!strncmp(options, "map:", 4)) {
464 options += 4;
623e71b0 465 if (*options) {
1da177e4
LT		 466 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
467 if (!options[j])
468 j = 0;
469 con2fb_map_boot[i] =
470 (options[j++]-'0') % FB_MAX;
471 }
623e71b0 472
4769a9a5 473 fbcon_map_override();
623e71b0 474 }
37773c4e 475 continue;
1da177e4
LT		 476 }
477
478 if (!strncmp(options, "vc:", 3)) {
479 options += 3;
480 if (*options)
481 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
482 if (first_fb_vc < 0)
483 first_fb_vc = 0;
484 if (*options++ == '-')
485 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
486 fbcon_is_default = 0;
37773c4e
MH		 487 continue;
488 }
e4fc2761
AD		 489
490 if (!strncmp(options, "rotate:", 7)) {
491 options += 7;
492 if (*options)
2428e59b
MS		 493 initial_rotation = simple_strtoul(options, &options, 0);
494 if (initial_rotation > 3)
495 initial_rotation = 0;
37773c4e 496 continue;
e4fc2761 497 }
1da177e4 498 }
9b41046c 499 return 1;
1da177e4
LT		 500}
501
502__setup("fbcon=", fb_console_setup);
503#endif
504
505static int search_fb_in_map(int idx)
506{
507 int i, retval = 0;
508
e614b18d 509 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 510 if (con2fb_map[i] == idx)
511 retval = 1;
512 }
513 return retval;
514}
515
516static int search_for_mapped_con(void)
517{
518 int i, retval = 0;
519
e614b18d 520 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 521 if (con2fb_map[i] != -1)
522 retval = 1;
523 }
524 return retval;
525}
526
50e244cc
AC		 527static int do_fbcon_takeover(int show_logo)
528{
529 int err, i;
530
531 if (!num_registered_fb)
532 return -ENODEV;
533
534 if (!show_logo)
535 logo_shown = FBCON_LOGO_DONTSHOW;
536
537 for (i = first_fb_vc; i <= last_fb_vc; i++)
538 con2fb_map[i] = info_idx;
539
540 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
541 fbcon_is_default);
542
543 if (err) {
544 for (i = first_fb_vc; i <= last_fb_vc; i++)
545 con2fb_map[i] = -1;
546 info_idx = -1;
547 } else {
548 fbcon_has_console_bind = 1;
1da177e4
LT		 549 }
550
551 return err;
552}
553
70802c60
AD		 554#ifdef MODULE
555static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
556 int cols, int rows, int new_cols, int new_rows)
557{
558 logo_shown = FBCON_LOGO_DONTSHOW;
559}
560#else
1da177e4
LT		 561static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
562 int cols, int rows, int new_cols, int new_rows)
563{
564 /* Need to make room for the logo */
9c44e5f6 565 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 566 int cnt, erase = vc->vc_video_erase_char, step;
567 unsigned short *save = NULL, *r, *q;
49a1d28f 568 int logo_height;
1da177e4 569
70802c60
AD		 570 if (info->flags & FBINFO_MODULE) {
571 logo_shown = FBCON_LOGO_DONTSHOW;
572 return;
573 }
574
1da177e4
LT		 575 /*
576 * remove underline attribute from erase character
577 * if black and white framebuffer.
578 */
b8c90945 579 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 580 erase &= ~0x400;
9c44e5f6 581 logo_height = fb_prepare_logo(info, ops->rotate);
416e74ea 582 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
1da177e4
LT		 583 q = (unsigned short *) (vc->vc_origin +
584 vc->vc_size_row * rows);
585 step = logo_lines * cols;
586 for (r = q - logo_lines * cols; r < q; r++)
587 if (scr_readw(r) != vc->vc_video_erase_char)
588 break;
589 if (r != q && new_rows >= rows + logo_lines) {
590 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
591 if (save) {
592 int i = cols < new_cols ? cols : new_cols;
593 scr_memsetw(save, erase, logo_lines * new_cols * 2);
594 r = q - step;
595 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
596 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
597 r = q;
598 }
599 }
600 if (r == q) {
601 /* We can scroll screen down */
602 r = q - step - cols;
603 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
604 scr_memcpyw(r + step, r, vc->vc_size_row);
605 r -= cols;
606 }
607 if (!save) {
250038f5
GU		 608 int lines;
609 if (vc->vc_y + logo_lines >= rows)
610 lines = rows - vc->vc_y - 1;
611 else
612 lines = logo_lines;
613 vc->vc_y += lines;
614 vc->vc_pos += lines * vc->vc_size_row;
1da177e4
LT		 615 }
616 }
617 scr_memsetw((unsigned short *) vc->vc_origin,
618 erase,
619 vc->vc_size_row * logo_lines);
620
621 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
622 fbcon_clear_margins(vc, 0);
623 update_screen(vc);
624 }
625
626 if (save) {
627 q = (unsigned short *) (vc->vc_origin +
628 vc->vc_size_row *
629 rows);
630 scr_memcpyw(q, save, logo_lines * new_cols * 2);
631 vc->vc_y += logo_lines;
632 vc->vc_pos += logo_lines * vc->vc_size_row;
633 kfree(save);
634 }
635
636 if (logo_lines > vc->vc_bottom) {
637 logo_shown = FBCON_LOGO_CANSHOW;
638 printk(KERN_INFO
639 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
640 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
641 logo_shown = FBCON_LOGO_DRAW;
642 vc->vc_top = logo_lines;
643 }
644}
70802c60 645#endif /* MODULE */
1da177e4
LT		 646
647#ifdef CONFIG_FB_TILEBLITTING
b73deed3 648static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 649{
650 struct fbcon_ops *ops = info->fbcon_par;
651
b73deed3 652 ops->p = &fb_display[vc->vc_num];
ab767201 653
1da177e4 654 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 655 fbcon_set_tileops(vc, info);
e4fc2761 656 else {
b73deed3 657 fbcon_set_rotation(info);
1da177e4 658 fbcon_set_bitops(ops);
e4fc2761 659 }
1da177e4 660}
38b4982c
AD		 661
662static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
663{
664 int err = 0;
665
666 if (info->flags & FBINFO_MISC_TILEBLITTING &&
667 info->tileops->fb_get_tilemax(info) < charcount)
668 err = 1;
669
670 return err;
671}
1da177e4 672#else
b73deed3 673static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 674{
675 struct fbcon_ops *ops = info->fbcon_par;
676
677 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 678 ops->p = &fb_display[vc->vc_num];
679 fbcon_set_rotation(info);
1da177e4
LT		 680 fbcon_set_bitops(ops);
681}
38b4982c
AD		 682
683static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
684{
685 return 0;
686}
687
1da177e4
LT		 688#endif /* CONFIG_MISC_TILEBLITTING */
689
690
691static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
692 int unit, int oldidx)
693{
694 struct fbcon_ops *ops = NULL;
695 int err = 0;
696
697 if (!try_module_get(info->fbops->owner))
698 err = -ENODEV;
699
700 if (!err && info->fbops->fb_open &&
701 info->fbops->fb_open(info, 0))
702 err = -ENODEV;
703
704 if (!err) {
a39bc34e 705 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 706 if (!ops)
707 err = -ENOMEM;
708 }
709
710 if (!err) {
a1e533ec 711 ops->cur_blink_jiffies = HZ / 5;
1da177e4 712 info->fbcon_par = ops;
d1baa4ff
AD		 713
714 if (vc)
715 set_blitting_type(vc, info);
1da177e4
LT		 716 }
717
718 if (err) {
719 con2fb_map[unit] = oldidx;
720 module_put(info->fbops->owner);
721 }
722
723 return err;
724}
725
726static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
727 struct fb_info *newinfo, int unit,
728 int oldidx, int found)
729{
730 struct fbcon_ops *ops = oldinfo->fbcon_par;
0fcf6ada 731 int err = 0, ret;
1da177e4
LT		 732
733 if (oldinfo->fbops->fb_release &&
734 oldinfo->fbops->fb_release(oldinfo, 0)) {
735 con2fb_map[unit] = oldidx;
736 if (!found && newinfo->fbops->fb_release)
737 newinfo->fbops->fb_release(newinfo, 0);
738 if (!found)
739 module_put(newinfo->fbops->owner);
740 err = -ENODEV;
741 }
742
743 if (!err) {
88fb2c6e 744 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 745 kfree(ops->cursor_state.mask);
746 kfree(ops->cursor_data);
7a966fbd 747 kfree(ops->cursor_src);
e4fc2761 748 kfree(ops->fontbuffer);
1da177e4
LT		 749 kfree(oldinfo->fbcon_par);
750 oldinfo->fbcon_par = NULL;
751 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 752 /*
753 If oldinfo and newinfo are driving the same hardware,
754 the fb_release() method of oldinfo may attempt to
755 restore the hardware state. This will leave the
756 newinfo in an undefined state. Thus, a call to
757 fb_set_par() may be needed for the newinfo.
758 */
5f4dc28b 759 if (newinfo && newinfo->fbops->fb_set_par) {
0fcf6ada
FTS		 760 ret = newinfo->fbops->fb_set_par(newinfo);
761
762 if (ret)
763 printk(KERN_ERR "con2fb_release_oldinfo: "
764 "detected unhandled fb_set_par error, "
765 "error code %d\n", ret);
766 }
1da177e4
LT		 767 }
768
769 return err;
770}
771
1da177e4
LT		 772static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
773 int unit, int show_logo)
774{
775 struct fbcon_ops *ops = info->fbcon_par;
0fcf6ada 776 int ret;
1da177e4
LT		 777
778 ops->currcon = fg_console;
779
0fcf6ada
FTS		 780 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
781 ret = info->fbops->fb_set_par(info);
782
783 if (ret)
784 printk(KERN_ERR "con2fb_init_display: detected "
785 "unhandled fb_set_par error, "
786 "error code %d\n", ret);
787 }
1da177e4
LT		 788
789 ops->flags |= FBCON_FLAGS_INIT;
790 ops->graphics = 0;
d1baa4ff 791 fbcon_set_disp(info, &info->var, unit);
1da177e4
LT		 792
793 if (show_logo) {
794 struct vc_data *fg_vc = vc_cons[fg_console].d;
795 struct fb_info *fg_info =
796 registered_fb[con2fb_map[fg_console]];
797
798 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
799 fg_vc->vc_rows, fg_vc->vc_cols,
800 fg_vc->vc_rows);
801 }
802
803 update_screen(vc_cons[fg_console].d);
804}
805
806/**
807 * set_con2fb_map - map console to frame buffer device
808 * @unit: virtual console number to map
809 * @newidx: frame buffer index to map virtual console to
810 * @user: user request
811 *
812 * Maps a virtual console @unit to a frame buffer device
813 * @newidx.
054430e7
DA		 814 *
815 * This should be called with the console lock held.
1da177e4
LT		 816 */
817static int set_con2fb_map(int unit, int newidx, int user)
818{
819 struct vc_data *vc = vc_cons[unit].d;
820 int oldidx = con2fb_map[unit];
821 struct fb_info *info = registered_fb[newidx];
822 struct fb_info *oldinfo = NULL;
823 int found, err = 0;
824
825 if (oldidx == newidx)
826 return 0;
827
32b98bf8 828 if (!info)
e614b18d 829 return -EINVAL;
1da177e4 830
32b98bf8 831 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
1da177e4 832 info_idx = newidx;
054430e7 833 return do_fbcon_takeover(0);
1da177e4
LT		 834 }
835
836 if (oldidx != -1)
837 oldinfo = registered_fb[oldidx];
838
839 found = search_fb_in_map(newidx);
840
1da177e4
LT		 841 con2fb_map[unit] = newidx;
842 if (!err && !found)
843 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
844
845
846 /*
847 * If old fb is not mapped to any of the consoles,
848 * fbcon should release it.
849 */
850 if (!err && oldinfo && !search_fb_in_map(oldidx))
851 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
852 found);
853
854 if (!err) {
855 int show_logo = (fg_console == 0 && !user &&
856 logo_shown != FBCON_LOGO_DONTSHOW);
857
858 if (!found)
88fb2c6e 859 fbcon_add_cursor_timer(info);
1da177e4
LT		 860 con2fb_map_boot[unit] = newidx;
861 con2fb_init_display(vc, info, unit, show_logo);
862 }
863
e614b18d
AD		 864 if (!search_fb_in_map(info_idx))
865 info_idx = newidx;
866
1da177e4
LT		 867 return err;
868}
869
870/*
871 * Low Level Operations
872 */
155957f5 873/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
1da177e4
LT		 874static int var_to_display(struct display *disp,
875 struct fb_var_screeninfo *var,
876 struct fb_info *info)
877{
878 disp->xres_virtual = var->xres_virtual;
879 disp->yres_virtual = var->yres_virtual;
880 disp->bits_per_pixel = var->bits_per_pixel;
881 disp->grayscale = var->grayscale;
882 disp->nonstd = var->nonstd;
883 disp->accel_flags = var->accel_flags;
884 disp->height = var->height;
885 disp->width = var->width;
886 disp->red = var->red;
887 disp->green = var->green;
888 disp->blue = var->blue;
889 disp->transp = var->transp;
890 disp->rotate = var->rotate;
891 disp->mode = fb_match_mode(var, &info->modelist);
892 if (disp->mode == NULL)
893 /* This should not happen */
894 return -EINVAL;
895 return 0;
896}
897
898static void display_to_var(struct fb_var_screeninfo *var,
899 struct display *disp)
900{
901 fb_videomode_to_var(var, disp->mode);
902 var->xres_virtual = disp->xres_virtual;
903 var->yres_virtual = disp->yres_virtual;
904 var->bits_per_pixel = disp->bits_per_pixel;
905 var->grayscale = disp->grayscale;
906 var->nonstd = disp->nonstd;
907 var->accel_flags = disp->accel_flags;
908 var->height = disp->height;
909 var->width = disp->width;
910 var->red = disp->red;
911 var->green = disp->green;
912 var->blue = disp->blue;
913 var->transp = disp->transp;
914 var->rotate = disp->rotate;
915}
916
917static const char *fbcon_startup(void)
918{
919 const char *display_desc = "frame buffer device";
920 struct display *p = &fb_display[fg_console];
921 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 922 const struct font_desc *font = NULL;
1da177e4
LT		 923 struct module *owner;
924 struct fb_info *info = NULL;
925 struct fbcon_ops *ops;
926 int rows, cols;
1da177e4 927
1da177e4
LT		 928 /*
929 * If num_registered_fb is zero, this is a call for the dummy part.
930 * The frame buffer devices weren't initialized yet.
931 */
932 if (!num_registered_fb || info_idx == -1)
933 return display_desc;
934 /*
935 * Instead of blindly using registered_fb[0], we use info_idx, set by
936 * fb_console_init();
937 */
938 info = registered_fb[info_idx];
939 if (!info)
940 return NULL;
941
942 owner = info->fbops->owner;
943 if (!try_module_get(owner))
944 return NULL;
945 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
946 module_put(owner);
947 return NULL;
948 }
949
a39bc34e 950 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 951 if (!ops) {
952 module_put(owner);
953 return NULL;
954 }
955
1da177e4
LT		 956 ops->currcon = -1;
957 ops->graphics = 1;
e4fc2761 958 ops->cur_rotate = -1;
a1e533ec 959 ops->cur_blink_jiffies = HZ / 5;
1da177e4 960 info->fbcon_par = ops;
2428e59b 961 p->con_rotate = initial_rotation;
b73deed3 962 set_blitting_type(vc, info);
1da177e4
LT		 963
964 if (info->fix.type != FB_TYPE_TEXT) {
965 if (fbcon_softback_size) {
966 if (!softback_buf) {
967 softback_buf =
968 (unsigned long)
969 kmalloc(fbcon_softback_size,
970 GFP_KERNEL);
971 if (!softback_buf) {
972 fbcon_softback_size = 0;
973 softback_top = 0;
974 }
975 }
976 } else {
977 if (softback_buf) {
978 kfree((void *) softback_buf);
979 softback_buf = 0;
980 softback_top = 0;
981 }
982 }
983 if (softback_buf)
984 softback_in = softback_top = softback_curr =
985 softback_buf;
986 softback_lines = 0;
987 }
988
989 /* Setup default font */
ae128786 990 if (!p->fontdata && !vc->vc_font.data) {
1da177e4
LT		 991 if (!fontname[0] || !(font = find_font(fontname)))
992 font = get_default_font(info->var.xres,
2d2699d9
AD		 993 info->var.yres,
994 info->pixmap.blit_x,
995 info->pixmap.blit_y);
1da177e4
LT		 996 vc->vc_font.width = font->width;
997 vc->vc_font.height = font->height;
2f4516db 998 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4 999 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
ae128786
DA		 1000 } else {
1001 p->fontdata = vc->vc_font.data;
1da177e4
LT		 1002 }
1003
e4fc2761
AD		 1004 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1005 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1006 cols /= vc->vc_font.width;
1007 rows /= vc->vc_font.height;
1da177e4
LT		 1008 vc_resize(vc, cols, rows);
1009
1010 DPRINTK("mode: %s\n", info->fix.id);
1011 DPRINTK("visual: %d\n", info->fix.visual);
1012 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1013 info->var.yres,
1014 info->var.bits_per_pixel);
1015
88fb2c6e 1016 fbcon_add_cursor_timer(info);
e614b18d 1017 fbcon_has_exited = 0;
1da177e4
LT		 1018 return display_desc;
1019}
1020
1021static void fbcon_init(struct vc_data *vc, int init)
1022{
1023 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1024 struct fbcon_ops *ops;
1025 struct vc_data **default_mode = vc->vc_display_fg;
1026 struct vc_data *svc = *default_mode;
1027 struct display *t, *p = &fb_display[vc->vc_num];
1028 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
0fcf6ada 1029 int cap, ret;
1da177e4
LT		 1030
1031 if (info_idx == -1 || info == NULL)
1032 return;
306958e8
AB		 1033
1034 cap = info->flags;
1035
1da177e4
LT		 1036 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1037 (info->fix.type == FB_TYPE_TEXT))
1038 logo = 0;
1039
1da177e4
LT		 1040 if (var_to_display(p, &info->var, info))
1041 return;
1042
d1baa4ff
AD		 1043 if (!info->fbcon_par)
1044 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1045
1da177e4
LT		 1046 /* If we are not the first console on this
1047 fb, copy the font from that console */
e614b18d
AD		 1048 t = &fb_display[fg_console];
1049 if (!p->fontdata) {
1050 if (t->fontdata) {
1051 struct vc_data *fvc = vc_cons[fg_console].d;
1052
1053 vc->vc_font.data = (void *)(p->fontdata =
1054 fvc->vc_font.data);
1055 vc->vc_font.width = fvc->vc_font.width;
1056 vc->vc_font.height = fvc->vc_font.height;
1057 p->userfont = t->userfont;
1058
1059 if (p->userfont)
1060 REFCOUNT(p->fontdata)++;
1061 } else {
1062 const struct font_desc *font = NULL;
1063
1064 if (!fontname[0] || !(font = find_font(fontname)))
1065 font = get_default_font(info->var.xres,
2d2699d9
AD		 1066 info->var.yres,
1067 info->pixmap.blit_x,
1068 info->pixmap.blit_y);
e614b18d
AD		 1069 vc->vc_font.width = font->width;
1070 vc->vc_font.height = font->height;
1071 vc->vc_font.data = (void *)(p->fontdata = font->data);
1072 vc->vc_font.charcount = 256; /* FIXME Need to
1073 support more fonts */
1074 }
1da177e4 1075 }
e614b18d 1076
1da177e4
LT		 1077 if (p->userfont)
1078 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1079
8fd4bd22 1080 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
b8c90945 1081 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1082 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1083 if (charcnt == 256) {
1084 vc->vc_hi_font_mask = 0;
1085 } else {
1086 vc->vc_hi_font_mask = 0x100;
1087 if (vc->vc_can_do_color)
1088 vc->vc_complement_mask <<= 1;
1089 }
1090
1091 if (!*svc->vc_uni_pagedir_loc)
1092 con_set_default_unimap(svc);
1093 if (!*vc->vc_uni_pagedir_loc)
1094 con_copy_unimap(vc, svc);
1095
e4fc2761 1096 ops = info->fbcon_par;
f235f664 1097 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
2428e59b 1098 p->con_rotate = initial_rotation;
b73deed3 1099 set_blitting_type(vc, info);
e4fc2761 1100
1da177e4
LT		 1101 cols = vc->vc_cols;
1102 rows = vc->vc_rows;
e4fc2761
AD		 1103 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1104 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1105 new_cols /= vc->vc_font.width;
1106 new_rows /= vc->vc_font.height;
1da177e4 1107
1da177e4
LT		 1108 /*
1109 * We must always set the mode. The mode of the previous console
1110 * driver could be in the same resolution but we are using different
1111 * hardware so we have to initialize the hardware.
1112 *
1113 * We need to do it in fbcon_init() to prevent screen corruption.
1114 */
d354d9af 1115 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4 1116 if (info->fbops->fb_set_par &&
0fcf6ada
FTS		 1117 !(ops->flags & FBCON_FLAGS_INIT)) {
1118 ret = info->fbops->fb_set_par(info);
1119
1120 if (ret)
1121 printk(KERN_ERR "fbcon_init: detected "
1122 "unhandled fb_set_par error, "
1123 "error code %d\n", ret);
1124 }
1125
1da177e4
LT		 1126 ops->flags |= FBCON_FLAGS_INIT;
1127 }
1128
1129 ops->graphics = 0;
1130
1131 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1132 !(cap & FBINFO_HWACCEL_DISABLED))
1133 p->scrollmode = SCROLL_MOVE;
1134 else /* default to something safe */
1135 p->scrollmode = SCROLL_REDRAW;
1136
1137 /*
1138 * ++guenther: console.c:vc_allocate() relies on initializing
1139 * vc_{cols,rows}, but we must not set those if we are only
1140 * resizing the console.
1141 */
0035fe00 1142 if (init) {
1da177e4
LT		 1143 vc->vc_cols = new_cols;
1144 vc->vc_rows = new_rows;
0035fe00
JW		 1145 } else
1146 vc_resize(vc, new_cols, new_rows);
1da177e4
LT		 1147
1148 if (logo)
1149 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1150
4d9c5b6e
AD		 1151 if (vc == svc && softback_buf)
1152 fbcon_update_softback(vc);
e4fc2761 1153
b73deed3 1154 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1155 ops->rotate = FB_ROTATE_UR;
b73deed3 1156 set_blitting_type(vc, info);
e4fc2761
AD		 1157 }
1158
1a37d5f5 1159 ops->p = &fb_display[fg_console];
1da177e4
LT		 1160}
1161
ae128786 1162static void fbcon_free_font(struct display *p, bool freefont)
e614b18d 1163{
ae128786 1164 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
e614b18d
AD		 1165 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1166 p->fontdata = NULL;
1167 p->userfont = 0;
1168}
1169
1da177e4
LT		 1170static void fbcon_deinit(struct vc_data *vc)
1171{
1172 struct display *p = &fb_display[vc->vc_num];
e614b18d
AD		 1173 struct fb_info *info;
1174 struct fbcon_ops *ops;
1175 int idx;
ae128786 1176 bool free_font = true;
1da177e4 1177
e614b18d
AD		 1178 idx = con2fb_map[vc->vc_num];
1179
1180 if (idx == -1)
1181 goto finished;
1182
1183 info = registered_fb[idx];
1184
1185 if (!info)
1186 goto finished;
1187
ae128786
DA		 1188 if (info->flags & FBINFO_MISC_FIRMWARE)
1189 free_font = false;
e614b18d
AD		 1190 ops = info->fbcon_par;
1191
1192 if (!ops)
1193 goto finished;
1194
1195 if (CON_IS_VISIBLE(vc))
1196 fbcon_del_cursor_timer(info);
1197
1198 ops->flags &= ~FBCON_FLAGS_INIT;
1199finished:
1200
ae128786 1201 fbcon_free_font(p, free_font);
e6637d54
MK		 1202 if (free_font)
1203 vc->vc_font.data = NULL;
ae128786 1204
e614b18d
AD		 1205 if (!con_is_bound(&fb_con))
1206 fbcon_exit();
1207
1208 return;
1da177e4
LT		 1209}
1210
1211/* ====================================================================== */
1212
1213/* fbcon_XXX routines - interface used by the world
1214 *
1215 * This system is now divided into two levels because of complications
1216 * caused by hardware scrolling. Top level functions:
1217 *
1218 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1219 *
1220 * handles y values in range [0, scr_height-1] that correspond to real
1221 * screen positions. y_wrap shift means that first line of bitmap may be
1222 * anywhere on this display. These functions convert lineoffsets to
1223 * bitmap offsets and deal with the wrap-around case by splitting blits.
1224 *
1225 * fbcon_bmove_physical_8() -- These functions fast implementations
1226 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1227 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1228 *
1229 * WARNING:
1230 *
1231 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1232 * Implies should only really hardware scroll in rows. Only reason for
1233 * restriction is simplicity & efficiency at the moment.
1234 */
1235
1da177e4
LT		 1236static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1237 int width)
1238{
1239 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1240 struct fbcon_ops *ops = info->fbcon_par;
1241
1242 struct display *p = &fb_display[vc->vc_num];
1243 u_int y_break;
1244
1245 if (fbcon_is_inactive(vc, info))
1246 return;
1247
1248 if (!height || !width)
1249 return;
1250
256fc0e5 1251 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
c213ddf3 1252 vc->vc_top = 0;
256fc0e5
KM		 1253 /*
1254 * If the font dimensions are not an integral of the display
1255 * dimensions then the ops->clear below won't end up clearing
1256 * the margins. Call clear_margins here in case the logo
1257 * bitmap stretched into the margin area.
1258 */
1259 fbcon_clear_margins(vc, 0);
1260 }
c213ddf3 1261
1da177e4
LT		 1262 /* Split blits that cross physical y_wrap boundary */
1263
1264 y_break = p->vrows - p->yscroll;
1265 if (sy < y_break && sy + height - 1 >= y_break) {
1266 u_int b = y_break - sy;
1267 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1268 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1269 width);
1270 } else
1271 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1272}
1273
1274static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1275 int count, int ypos, int xpos)
1276{
1277 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1278 struct display *p = &fb_display[vc->vc_num];
1279 struct fbcon_ops *ops = info->fbcon_par;
1280
1281 if (!fbcon_is_inactive(vc, info))
1282 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1283 get_color(vc, info, scr_readw(s), 1),
1284 get_color(vc, info, scr_readw(s), 0));
1285}
1286
1287static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1288{
1289 unsigned short chr;
1290
1291 scr_writew(c, &chr);
1292 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1293}
1294
1295static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1296{
1297 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1298 struct fbcon_ops *ops = info->fbcon_par;
1299
1300 if (!fbcon_is_inactive(vc, info))
1301 ops->clear_margins(vc, info, bottom_only);
1302}
1303
1304static void fbcon_cursor(struct vc_data *vc, int mode)
1305{
1306 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1307 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1308 int y;
1309 int c = scr_readw((u16 *) vc->vc_pos);
1310
2a17d7e8
SD		 1311 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1312
d1e23066 1313 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1da177e4
LT		 1314 return;
1315
a5edce42
TR		 1316 if (vc->vc_cursor_type & 0x10)
1317 fbcon_del_cursor_timer(info);
1318 else
acba9cd0
AD		 1319 fbcon_add_cursor_timer(info);
1320
1da177e4
LT		 1321 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1322 if (mode & CM_SOFTBACK) {
1323 mode &= ~CM_SOFTBACK;
1324 y = softback_lines;
1325 } else {
1326 if (softback_lines)
1327 fbcon_set_origin(vc);
1328 y = 0;
1329 }
1330
b73deed3 1331 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4 1332 get_color(vc, info, c, 0));
1da177e4
LT		 1333}
1334
1335static int scrollback_phys_max = 0;
1336static int scrollback_max = 0;
1337static int scrollback_current = 0;
1338
1da177e4 1339static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 1340 int unit)
1da177e4 1341{
d1baa4ff
AD		 1342 struct display *p, *t;
1343 struct vc_data **default_mode, *vc;
1344 struct vc_data *svc;
e4fc2761 1345 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1346 int rows, cols, charcnt = 256;
1347
d1baa4ff
AD		 1348 p = &fb_display[unit];
1349
1da177e4
LT		 1350 if (var_to_display(p, var, info))
1351 return;
d1baa4ff
AD		 1352
1353 vc = vc_cons[unit].d;
1354
1355 if (!vc)
1356 return;
1357
1358 default_mode = vc->vc_display_fg;
1359 svc = *default_mode;
1da177e4 1360 t = &fb_display[svc->vc_num];
d1baa4ff 1361
1da177e4 1362 if (!vc->vc_font.data) {
2f4516db 1363 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1364 vc->vc_font.width = (*default_mode)->vc_font.width;
1365 vc->vc_font.height = (*default_mode)->vc_font.height;
1366 p->userfont = t->userfont;
1367 if (p->userfont)
1368 REFCOUNT(p->fontdata)++;
1369 }
1370 if (p->userfont)
1371 charcnt = FNTCHARCNT(p->fontdata);
1372
b8c90945
AD		 1373 var->activate = FB_ACTIVATE_NOW;
1374 info->var.activate = var->activate;
e4fc2761
AD		 1375 var->yoffset = info->var.yoffset;
1376 var->xoffset = info->var.xoffset;
b8c90945 1377 fb_set_var(info, var);
e4fc2761 1378 ops->var = info->var;
b8c90945 1379 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1380 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1381 if (charcnt == 256) {
1382 vc->vc_hi_font_mask = 0;
1383 } else {
1384 vc->vc_hi_font_mask = 0x100;
1385 if (vc->vc_can_do_color)
1386 vc->vc_complement_mask <<= 1;
1387 }
1388
1389 if (!*svc->vc_uni_pagedir_loc)
1390 con_set_default_unimap(svc);
1391 if (!*vc->vc_uni_pagedir_loc)
1392 con_copy_unimap(vc, svc);
1393
e4fc2761
AD		 1394 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1395 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1396 cols /= vc->vc_font.width;
1397 rows /= vc->vc_font.height;
1da177e4 1398 vc_resize(vc, cols, rows);
e4fc2761 1399
1da177e4
LT		 1400 if (CON_IS_VISIBLE(vc)) {
1401 update_screen(vc);
4d9c5b6e
AD		 1402 if (softback_buf)
1403 fbcon_update_softback(vc);
1da177e4
LT		 1404 }
1405}
1406
1407static __inline__ void ywrap_up(struct vc_data *vc, int count)
1408{
1409 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1410 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1411 struct display *p = &fb_display[vc->vc_num];
1412
1413 p->yscroll += count;
1414 if (p->yscroll >= p->vrows) /* Deal with wrap */
1415 p->yscroll -= p->vrows;
e4fc2761
AD		 1416 ops->var.xoffset = 0;
1417 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1418 ops->var.vmode |= FB_VMODE_YWRAP;
1419 ops->update_start(info);
1da177e4
LT		 1420 scrollback_max += count;
1421 if (scrollback_max > scrollback_phys_max)
1422 scrollback_max = scrollback_phys_max;
1423 scrollback_current = 0;
1424}
1425
1426static __inline__ void ywrap_down(struct vc_data *vc, int count)
1427{
1428 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1429 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1430 struct display *p = &fb_display[vc->vc_num];
1431
1432 p->yscroll -= count;
1433 if (p->yscroll < 0) /* Deal with wrap */
1434 p->yscroll += p->vrows;
e4fc2761
AD		 1435 ops->var.xoffset = 0;
1436 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1437 ops->var.vmode |= FB_VMODE_YWRAP;
1438 ops->update_start(info);
1da177e4
LT		 1439 scrollback_max -= count;
1440 if (scrollback_max < 0)
1441 scrollback_max = 0;
1442 scrollback_current = 0;
1443}
1444
1445static __inline__ void ypan_up(struct vc_data *vc, int count)
1446{
1447 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1448 struct display *p = &fb_display[vc->vc_num];
1449 struct fbcon_ops *ops = info->fbcon_par;
1450
1451 p->yscroll += count;
1452 if (p->yscroll > p->vrows - vc->vc_rows) {
1453 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1454 0, 0, 0, vc->vc_rows, vc->vc_cols);
1455 p->yscroll -= p->vrows - vc->vc_rows;
1456 }
e4fc2761
AD		 1457
1458 ops->var.xoffset = 0;
1459 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1460 ops->var.vmode &= ~FB_VMODE_YWRAP;
1461 ops->update_start(info);
1da177e4
LT		 1462 fbcon_clear_margins(vc, 1);
1463 scrollback_max += count;
1464 if (scrollback_max > scrollback_phys_max)
1465 scrollback_max = scrollback_phys_max;
1466 scrollback_current = 0;
1467}
1468
1469static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1470{
1471 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1472 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1473 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1474
1475 p->yscroll += count;
a39bc34e 1476
1da177e4
LT		 1477 if (p->yscroll > p->vrows - vc->vc_rows) {
1478 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1479 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1480 }
e4fc2761
AD		 1481
1482 ops->var.xoffset = 0;
1483 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1484 ops->var.vmode &= ~FB_VMODE_YWRAP;
1485 ops->update_start(info);
1da177e4
LT		 1486 fbcon_clear_margins(vc, 1);
1487 scrollback_max += count;
1488 if (scrollback_max > scrollback_phys_max)
1489 scrollback_max = scrollback_phys_max;
1490 scrollback_current = 0;
1491}
1492
1493static __inline__ void ypan_down(struct vc_data *vc, int count)
1494{
1495 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1496 struct display *p = &fb_display[vc->vc_num];
1497 struct fbcon_ops *ops = info->fbcon_par;
1498
1499 p->yscroll -= count;
1500 if (p->yscroll < 0) {
1501 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1502 0, vc->vc_rows, vc->vc_cols);
1503 p->yscroll += p->vrows - vc->vc_rows;
1504 }
e4fc2761
AD		 1505
1506 ops->var.xoffset = 0;
1507 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1508 ops->var.vmode &= ~FB_VMODE_YWRAP;
1509 ops->update_start(info);
1da177e4
LT		 1510 fbcon_clear_margins(vc, 1);
1511 scrollback_max -= count;
1512 if (scrollback_max < 0)
1513 scrollback_max = 0;
1514 scrollback_current = 0;
1515}
1516
1517static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1518{
1519 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1520 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1521 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1522
1523 p->yscroll -= count;
a39bc34e 1524
1da177e4
LT		 1525 if (p->yscroll < 0) {
1526 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1527 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1528 }
e4fc2761
AD		 1529
1530 ops->var.xoffset = 0;
1531 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1532 ops->var.vmode &= ~FB_VMODE_YWRAP;
1533 ops->update_start(info);
1da177e4
LT		 1534 fbcon_clear_margins(vc, 1);
1535 scrollback_max -= count;
1536 if (scrollback_max < 0)
1537 scrollback_max = 0;
1538 scrollback_current = 0;
1539}
1540
1541static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1542 long delta)
1543{
1544 int count = vc->vc_rows;
1545 unsigned short *d, *s;
1546 unsigned long n;
1547 int line = 0;
1548
1549 d = (u16 *) softback_curr;
1550 if (d == (u16 *) softback_in)
1551 d = (u16 *) vc->vc_origin;
1552 n = softback_curr + delta * vc->vc_size_row;
1553 softback_lines -= delta;
1554 if (delta < 0) {
1555 if (softback_curr < softback_top && n < softback_buf) {
1556 n += softback_end - softback_buf;
1557 if (n < softback_top) {
1558 softback_lines -=
1559 (softback_top - n) / vc->vc_size_row;
1560 n = softback_top;
1561 }
1562 } else if (softback_curr >= softback_top
1563 && n < softback_top) {
1564 softback_lines -=
1565 (softback_top - n) / vc->vc_size_row;
1566 n = softback_top;
1567 }
1568 } else {
1569 if (softback_curr > softback_in && n >= softback_end) {
1570 n += softback_buf - softback_end;
1571 if (n > softback_in) {
1572 n = softback_in;
1573 softback_lines = 0;
1574 }
1575 } else if (softback_curr <= softback_in && n > softback_in) {
1576 n = softback_in;
1577 softback_lines = 0;
1578 }
1579 }
1580 if (n == softback_curr)
1581 return;
1582 softback_curr = n;
1583 s = (u16 *) softback_curr;
1584 if (s == (u16 *) softback_in)
1585 s = (u16 *) vc->vc_origin;
1586 while (count--) {
1587 unsigned short *start;
1588 unsigned short *le;
1589 unsigned short c;
1590 int x = 0;
1591 unsigned short attr = 1;
1592
1593 start = s;
1594 le = advance_row(s, 1);
1595 do {
1596 c = scr_readw(s);
1597 if (attr != (c & 0xff00)) {
1598 attr = c & 0xff00;
1599 if (s > start) {
1600 fbcon_putcs(vc, start, s - start,
1601 line, x);
1602 x += s - start;
1603 start = s;
1604 }
1605 }
1606 if (c == scr_readw(d)) {
1607 if (s > start) {
1608 fbcon_putcs(vc, start, s - start,
1609 line, x);
1610 x += s - start + 1;
1611 start = s + 1;
1612 } else {
1613 x++;
1614 start++;
1615 }
1616 }
1617 s++;
1618 d++;
1619 } while (s < le);
1620 if (s > start)
1621 fbcon_putcs(vc, start, s - start, line, x);
1622 line++;
1623 if (d == (u16 *) softback_end)
1624 d = (u16 *) softback_buf;
1625 if (d == (u16 *) softback_in)
1626 d = (u16 *) vc->vc_origin;
1627 if (s == (u16 *) softback_end)
1628 s = (u16 *) softback_buf;
1629 if (s == (u16 *) softback_in)
1630 s = (u16 *) vc->vc_origin;
1631 }
1632}
1633
1634static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1635 int line, int count, int dy)
1636{
1637 unsigned short *s = (unsigned short *)
1638 (vc->vc_origin + vc->vc_size_row * line);
1639
1640 while (count--) {
1641 unsigned short *start = s;
1642 unsigned short *le = advance_row(s, 1);
1643 unsigned short c;
1644 int x = 0;
1645 unsigned short attr = 1;
1646
1647 do {
1648 c = scr_readw(s);
1649 if (attr != (c & 0xff00)) {
1650 attr = c & 0xff00;
1651 if (s > start) {
1652 fbcon_putcs(vc, start, s - start,
1653 dy, x);
1654 x += s - start;
1655 start = s;
1656 }
1657 }
1658 console_conditional_schedule();
1659 s++;
1660 } while (s < le);
1661 if (s > start)
1662 fbcon_putcs(vc, start, s - start, dy, x);
1663 console_conditional_schedule();
1664 dy++;
1665 }
1666}
1667
bad07ff7
KH		 1668static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1669 struct display *p, int line, int count, int ycount)
1670{
1671 int offset = ycount * vc->vc_cols;
1672 unsigned short *d = (unsigned short *)
1673 (vc->vc_origin + vc->vc_size_row * line);
1674 unsigned short *s = d + offset;
1675 struct fbcon_ops *ops = info->fbcon_par;
1676
1677 while (count--) {
1678 unsigned short *start = s;
1679 unsigned short *le = advance_row(s, 1);
1680 unsigned short c;
1681 int x = 0;
1682
1683 do {
1684 c = scr_readw(s);
1685
1686 if (c == scr_readw(d)) {
1687 if (s > start) {
1688 ops->bmove(vc, info, line + ycount, x,
1689 line, x, 1, s-start);
1690 x += s - start + 1;
1691 start = s + 1;
1692 } else {
1693 x++;
1694 start++;
1695 }
1696 }
1697
1698 scr_writew(c, d);
1699 console_conditional_schedule();
1700 s++;
1701 d++;
1702 } while (s < le);
1703 if (s > start)
1704 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1705 s-start);
1706 console_conditional_schedule();
1707 if (ycount > 0)
1708 line++;
1709 else {
1710 line--;
1711 /* NOTE: We subtract two lines from these pointers */
1712 s -= vc->vc_size_row;
1713 d -= vc->vc_size_row;
1714 }
1715 }
1716}
1717
1da177e4
LT		 1718static void fbcon_redraw(struct vc_data *vc, struct display *p,
1719 int line, int count, int offset)
1720{
1721 unsigned short *d = (unsigned short *)
1722 (vc->vc_origin + vc->vc_size_row * line);
1723 unsigned short *s = d + offset;
1724
1725 while (count--) {
1726 unsigned short *start = s;
1727 unsigned short *le = advance_row(s, 1);
1728 unsigned short c;
1729 int x = 0;
1730 unsigned short attr = 1;
1731
1732 do {
1733 c = scr_readw(s);
1734 if (attr != (c & 0xff00)) {
1735 attr = c & 0xff00;
1736 if (s > start) {
1737 fbcon_putcs(vc, start, s - start,
1738 line, x);
1739 x += s - start;
1740 start = s;
1741 }
1742 }
1743 if (c == scr_readw(d)) {
1744 if (s > start) {
1745 fbcon_putcs(vc, start, s - start,
1746 line, x);
1747 x += s - start + 1;
1748 start = s + 1;
1749 } else {
1750 x++;
1751 start++;
1752 }
1753 }
1754 scr_writew(c, d);
1755 console_conditional_schedule();
1756 s++;
1757 d++;
1758 } while (s < le);
1759 if (s > start)
1760 fbcon_putcs(vc, start, s - start, line, x);
1761 console_conditional_schedule();
1762 if (offset > 0)
1763 line++;
1764 else {
1765 line--;
1766 /* NOTE: We subtract two lines from these pointers */
1767 s -= vc->vc_size_row;
1768 d -= vc->vc_size_row;
1769 }
1770 }
1771}
1772
1773static inline void fbcon_softback_note(struct vc_data *vc, int t,
1774 int count)
1775{
1776 unsigned short *p;
1777
1778 if (vc->vc_num != fg_console)
1779 return;
1780 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1781
1782 while (count) {
1783 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1784 count--;
1785 p = advance_row(p, 1);
1786 softback_in += vc->vc_size_row;
1787 if (softback_in == softback_end)
1788 softback_in = softback_buf;
1789 if (softback_in == softback_top) {
1790 softback_top += vc->vc_size_row;
1791 if (softback_top == softback_end)
1792 softback_top = softback_buf;
1793 }
1794 }
1795 softback_curr = softback_in;
1796}
1797
1798static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1799 int count)
1800{
1801 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1802 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1803 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1804
1805 if (fbcon_is_inactive(vc, info))
1806 return -EINVAL;
1807
1808 fbcon_cursor(vc, CM_ERASE);
1809
1810 /*
1811 * ++Geert: Only use ywrap/ypan if the console is in text mode
1812 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1813 * whole screen (prevents flicker).
1814 */
1815
1816 switch (dir) {
1817 case SM_UP:
1818 if (count > vc->vc_rows) /* Maximum realistic size */
1819 count = vc->vc_rows;
1820 if (softback_top)
1821 fbcon_softback_note(vc, t, count);
1822 if (logo_shown >= 0)
1823 goto redraw_up;
1824 switch (p->scrollmode) {
1825 case SCROLL_MOVE:
bad07ff7
KH		 1826 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1827 count);
1828 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1829 scr_memsetw((unsigned short *) (vc->vc_origin +
1830 vc->vc_size_row *
1831 (b - count)),
93f78da4 1832 vc->vc_video_erase_char,
bad07ff7 1833 vc->vc_size_row * count);
93f78da4 1834 return 1;
1da177e4
LT		 1835 break;
1836
1837 case SCROLL_WRAP_MOVE:
1838 if (b - t - count > 3 * vc->vc_rows >> 2) {
1839 if (t > 0)
1840 fbcon_bmove(vc, 0, 0, count, 0, t,
1841 vc->vc_cols);
1842 ywrap_up(vc, count);
1843 if (vc->vc_rows - b > 0)
1844 fbcon_bmove(vc, b - count, 0, b, 0,
1845 vc->vc_rows - b,
1846 vc->vc_cols);
1847 } else if (info->flags & FBINFO_READS_FAST)
1848 fbcon_bmove(vc, t + count, 0, t, 0,
1849 b - t - count, vc->vc_cols);
1850 else
1851 goto redraw_up;
1852 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1853 break;
1854
1855 case SCROLL_PAN_REDRAW:
1856 if ((p->yscroll + count <=
1857 2 * (p->vrows - vc->vc_rows))
1858 && ((!scroll_partial && (b - t == vc->vc_rows))
1859 || (scroll_partial
1860 && (b - t - count >
1861 3 * vc->vc_rows >> 2)))) {
1862 if (t > 0)
1863 fbcon_redraw_move(vc, p, 0, t, count);
1864 ypan_up_redraw(vc, t, count);
1865 if (vc->vc_rows - b > 0)
26e780e8 1866 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1867 vc->vc_rows - b, b);
1868 } else
1869 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1870 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1871 break;
1872
1873 case SCROLL_PAN_MOVE:
1874 if ((p->yscroll + count <=
1875 2 * (p->vrows - vc->vc_rows))
1876 && ((!scroll_partial && (b - t == vc->vc_rows))
1877 || (scroll_partial
1878 && (b - t - count >
1879 3 * vc->vc_rows >> 2)))) {
1880 if (t > 0)
1881 fbcon_bmove(vc, 0, 0, count, 0, t,
1882 vc->vc_cols);
1883 ypan_up(vc, count);
1884 if (vc->vc_rows - b > 0)
1885 fbcon_bmove(vc, b - count, 0, b, 0,
1886 vc->vc_rows - b,
1887 vc->vc_cols);
1888 } else if (info->flags & FBINFO_READS_FAST)
1889 fbcon_bmove(vc, t + count, 0, t, 0,
1890 b - t - count, vc->vc_cols);
1891 else
1892 goto redraw_up;
1893 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1894 break;
1895
1896 case SCROLL_REDRAW:
1897 redraw_up:
1898 fbcon_redraw(vc, p, t, b - t - count,
1899 count * vc->vc_cols);
1900 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1901 scr_memsetw((unsigned short *) (vc->vc_origin +
1902 vc->vc_size_row *
1903 (b - count)),
93f78da4 1904 vc->vc_video_erase_char,
1da177e4 1905 vc->vc_size_row * count);
93f78da4 1906 return 1;
1da177e4
LT		 1907 }
1908 break;
1909
1910 case SM_DOWN:
1911 if (count > vc->vc_rows) /* Maximum realistic size */
1912 count = vc->vc_rows;
e703ecc3
JB		 1913 if (logo_shown >= 0)
1914 goto redraw_down;
1da177e4
LT		 1915 switch (p->scrollmode) {
1916 case SCROLL_MOVE:
bad07ff7
KH		 1917 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1918 -count);
1919 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1920 scr_memsetw((unsigned short *) (vc->vc_origin +
1921 vc->vc_size_row *
1922 t),
93f78da4 1923 vc->vc_video_erase_char,
bad07ff7 1924 vc->vc_size_row * count);
93f78da4 1925 return 1;
1da177e4
LT		 1926 break;
1927
1928 case SCROLL_WRAP_MOVE:
1929 if (b - t - count > 3 * vc->vc_rows >> 2) {
1930 if (vc->vc_rows - b > 0)
1931 fbcon_bmove(vc, b, 0, b - count, 0,
1932 vc->vc_rows - b,
1933 vc->vc_cols);
1934 ywrap_down(vc, count);
1935 if (t > 0)
1936 fbcon_bmove(vc, count, 0, 0, 0, t,
1937 vc->vc_cols);
1938 } else if (info->flags & FBINFO_READS_FAST)
1939 fbcon_bmove(vc, t, 0, t + count, 0,
1940 b - t - count, vc->vc_cols);
1941 else
1942 goto redraw_down;
1943 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1944 break;
1945
1946 case SCROLL_PAN_MOVE:
1947 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1948 && ((!scroll_partial && (b - t == vc->vc_rows))
1949 || (scroll_partial
1950 && (b - t - count >
1951 3 * vc->vc_rows >> 2)))) {
1952 if (vc->vc_rows - b > 0)
1953 fbcon_bmove(vc, b, 0, b - count, 0,
1954 vc->vc_rows - b,
1955 vc->vc_cols);
1956 ypan_down(vc, count);
1957 if (t > 0)
1958 fbcon_bmove(vc, count, 0, 0, 0, t,
1959 vc->vc_cols);
1960 } else if (info->flags & FBINFO_READS_FAST)
1961 fbcon_bmove(vc, t, 0, t + count, 0,
1962 b - t - count, vc->vc_cols);
1963 else
1964 goto redraw_down;
1965 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1966 break;
1967
1968 case SCROLL_PAN_REDRAW:
1969 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1970 && ((!scroll_partial && (b - t == vc->vc_rows))
1971 || (scroll_partial
1972 && (b - t - count >
1973 3 * vc->vc_rows >> 2)))) {
1974 if (vc->vc_rows - b > 0)
1975 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1976 b - count);
1977 ypan_down_redraw(vc, t, count);
1978 if (t > 0)
1979 fbcon_redraw_move(vc, p, count, t, 0);
1980 } else
1981 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1982 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1983 break;
1984
1985 case SCROLL_REDRAW:
1986 redraw_down:
1987 fbcon_redraw(vc, p, b - 1, b - t - count,
1988 -count * vc->vc_cols);
1989 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1990 scr_memsetw((unsigned short *) (vc->vc_origin +
1991 vc->vc_size_row *
1992 t),
93f78da4 1993 vc->vc_video_erase_char,
1da177e4 1994 vc->vc_size_row * count);
93f78da4 1995 return 1;
1da177e4
LT		 1996 }
1997 }
93f78da4 1998 return 0;
1da177e4
LT		 1999}
2000
2001
2002static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2003 int height, int width)
2004{
2005 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2006 struct display *p = &fb_display[vc->vc_num];
2007
2008 if (fbcon_is_inactive(vc, info))
2009 return;
2010
2011 if (!width || !height)
2012 return;
2013
2014 /* Split blits that cross physical y_wrap case.
2015 * Pathological case involves 4 blits, better to use recursive
2016 * code rather than unrolled case
2017 *
2018 * Recursive invocations don't need to erase the cursor over and
2019 * over again, so we use fbcon_bmove_rec()
2020 */
2021 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2022 p->vrows - p->yscroll);
2023}
2024
2025static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2026 int dy, int dx, int height, int width, u_int y_break)
2027{
2028 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2029 struct fbcon_ops *ops = info->fbcon_par;
2030 u_int b;
2031
2032 if (sy < y_break && sy + height > y_break) {
2033 b = y_break - sy;
2034 if (dy < sy) { /* Avoid trashing self */
2035 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2036 y_break);
2037 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2038 height - b, width, y_break);
2039 } else {
2040 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2041 height - b, width, y_break);
2042 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2043 y_break);
2044 }
2045 return;
2046 }
2047
2048 if (dy < y_break && dy + height > y_break) {
2049 b = y_break - dy;
2050 if (dy < sy) { /* Avoid trashing self */
2051 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2052 y_break);
2053 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2054 height - b, width, y_break);
2055 } else {
2056 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2057 height - b, width, y_break);
2058 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2059 y_break);
2060 }
2061 return;
2062 }
2063 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2064 height, width);
2065}
2066
def1be2d 2067static void updatescrollmode(struct display *p,
e4fc2761 2068 struct fb_info *info,
1da177e4
LT		 2069 struct vc_data *vc)
2070{
e4fc2761 2071 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2072 int fh = vc->vc_font.height;
2073 int cap = info->flags;
e4fc2761
AD		 2074 u16 t = 0;
2075 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2076 info->fix.xpanstep);
2077 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2078 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2079 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2080 info->var.xres_virtual);
2081 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2082 divides(ypan, vc->vc_font.height) && vyres > yres;
2083 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2084 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 2085 divides(vc->vc_font.height, vyres) &&
2086 divides(vc->vc_font.height, yres);
1da177e4 2087 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 2088 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2089 !(cap & FBINFO_HWACCEL_DISABLED);
2090 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2091 !(cap & FBINFO_HWACCEL_DISABLED);
2092
2093 p->vrows = vyres/fh;
2094 if (yres > (fh * (vc->vc_rows + 1)))
2095 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2096 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 2097 p->vrows--;
2098
2099 if (good_wrap || good_pan) {
2100 if (reading_fast || fast_copyarea)
e4fc2761
AD		 2101 p->scrollmode = good_wrap ?
2102 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 2103 else
2104 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2105 SCROLL_PAN_REDRAW;
2106 } else {
2107 if (reading_fast || (fast_copyarea && !fast_imageblit))
2108 p->scrollmode = SCROLL_MOVE;
2109 else
2110 p->scrollmode = SCROLL_REDRAW;
2111 }
2112}
2113
2114static int fbcon_resize(struct vc_data *vc, unsigned int width,
e400b6ec 2115 unsigned int height, unsigned int user)
1da177e4
LT		 2116{
2117 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2118 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2119 struct display *p = &fb_display[vc->vc_num];
2120 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2121 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2122
2123 virt_w = FBCON_SWAP(ops->rotate, width, height);
2124 virt_h = FBCON_SWAP(ops->rotate, height, width);
2125 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2126 vc->vc_font.height);
2127 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2128 vc->vc_font.width);
2129 var.xres = virt_w * virt_fw;
2130 var.yres = virt_h * virt_fh;
1da177e4
LT		 2131 x_diff = info->var.xres - var.xres;
2132 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2133 if (x_diff < 0 || x_diff > virt_fw ||
2134 y_diff < 0 || y_diff > virt_fh) {
9791d763 2135 const struct fb_videomode *mode;
1da177e4
LT		 2136
2137 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2138 mode = fb_find_best_mode(&var, &info->modelist);
2139 if (mode == NULL)
2140 return -EINVAL;
3084a895 2141 display_to_var(&var, p);
1da177e4 2142 fb_videomode_to_var(&var, mode);
3084a895 2143
e4fc2761 2144 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2145 return -EINVAL;
1da177e4
LT		 2146
2147 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2148 if (CON_IS_VISIBLE(vc)) {
2149 var.activate = FB_ACTIVATE_NOW |
2150 FB_ACTIVATE_FORCE;
2151 fb_set_var(info, &var);
2152 }
2153 var_to_display(p, &info->var, info);
e4fc2761 2154 ops->var = info->var;
1da177e4
LT		 2155 }
2156 updatescrollmode(p, info, vc);
2157 return 0;
2158}
2159
2160static int fbcon_switch(struct vc_data *vc)
2161{
88fb2c6e 2162 struct fb_info *info, *old_info = NULL;
e4fc2761 2163 struct fbcon_ops *ops;
1da177e4
LT		 2164 struct display *p = &fb_display[vc->vc_num];
2165 struct fb_var_screeninfo var;
0fcf6ada 2166 int i, ret, prev_console, charcnt = 256;
1da177e4
LT		 2167
2168 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2169 ops = info->fbcon_par;
1da177e4
LT		 2170
2171 if (softback_top) {
1da177e4
LT		 2172 if (softback_lines)
2173 fbcon_set_origin(vc);
2174 softback_top = softback_curr = softback_in = softback_buf;
2175 softback_lines = 0;
4d9c5b6e 2176 fbcon_update_softback(vc);
1da177e4
LT		 2177 }
2178
2179 if (logo_shown >= 0) {
2180 struct vc_data *conp2 = vc_cons[logo_shown].d;
2181
2182 if (conp2->vc_top == logo_lines
2183 && conp2->vc_bottom == conp2->vc_rows)
2184 conp2->vc_top = 0;
2185 logo_shown = FBCON_LOGO_CANSHOW;
2186 }
2187
e4fc2761 2188 prev_console = ops->currcon;
88fb2c6e
AD		 2189 if (prev_console != -1)
2190 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2191 /*
2192 * FIXME: If we have multiple fbdev's loaded, we need to
2193 * update all info->currcon. Perhaps, we can place this
2194 * in a centralized structure, but this might break some
2195 * drivers.
2196 *
2197 * info->currcon = vc->vc_num;
2198 */
2199 for (i = 0; i < FB_MAX; i++) {
2200 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2201 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2202
e4fc2761 2203 o->currcon = vc->vc_num;
1da177e4
LT		 2204 }
2205 }
2206 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2207 display_to_var(&var, p);
2208 var.activate = FB_ACTIVATE_NOW;
2209
2210 /*
2211 * make sure we don't unnecessarily trip the memcmp()
2212 * in fb_set_var()
2213 */
2214 info->var.activate = var.activate;
10732c35 2215 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
1da177e4 2216 fb_set_var(info, &var);
e4fc2761 2217 ops->var = info->var;
1da177e4 2218
39942fd8
KP		 2219 if (old_info != NULL && (old_info != info ||
2220 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
0fcf6ada
FTS		 2221 if (info->fbops->fb_set_par) {
2222 ret = info->fbops->fb_set_par(info);
2223
2224 if (ret)
2225 printk(KERN_ERR "fbcon_switch: detected "
2226 "unhandled fb_set_par error, "
2227 "error code %d\n", ret);
2228 }
a39bc34e 2229
5428b044 2230 if (old_info != info)
a39bc34e 2231 fbcon_del_cursor_timer(old_info);
88fb2c6e 2232 }
1da177e4 2233
212f2639
AD		 2234 if (fbcon_is_inactive(vc, info) ||
2235 ops->blank_state != FB_BLANK_UNBLANK)
2236 fbcon_del_cursor_timer(info);
2237 else
2238 fbcon_add_cursor_timer(info);
2239
b73deed3 2240 set_blitting_type(vc, info);
e4fc2761
AD		 2241 ops->cursor_reset = 1;
2242
b73deed3 2243 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2244 ops->rotate = FB_ROTATE_UR;
b73deed3 2245 set_blitting_type(vc, info);
e4fc2761 2246 }
1da177e4 2247
b8c90945 2248 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2249 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2250
2251 if (p->userfont)
2252 charcnt = FNTCHARCNT(vc->vc_font.data);
2253
2254 if (charcnt > 256)
2255 vc->vc_complement_mask <<= 1;
2256
1da177e4
LT		 2257 updatescrollmode(p, info, vc);
2258
2259 switch (p->scrollmode) {
2260 case SCROLL_WRAP_MOVE:
2261 scrollback_phys_max = p->vrows - vc->vc_rows;
2262 break;
2263 case SCROLL_PAN_MOVE:
2264 case SCROLL_PAN_REDRAW:
2265 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2266 if (scrollback_phys_max < 0)
2267 scrollback_phys_max = 0;
2268 break;
2269 default:
2270 scrollback_phys_max = 0;
2271 break;
2272 }
e4fc2761 2273
1da177e4
LT		 2274 scrollback_max = 0;
2275 scrollback_current = 0;
4e1567d3
AD		 2276
2277 if (!fbcon_is_inactive(vc, info)) {
2278 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2279 ops->update_start(info);
2280 }
2281
1da177e4
LT		 2282 fbcon_set_palette(vc, color_table);
2283 fbcon_clear_margins(vc, 0);
2284
2285 if (logo_shown == FBCON_LOGO_DRAW) {
2286
2287 logo_shown = fg_console;
2288 /* This is protected above by initmem_freed */
9c44e5f6 2289 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2290 update_region(vc,
2291 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2292 vc->vc_size_row * (vc->vc_bottom -
2293 vc->vc_top) / 2);
2294 return 0;
2295 }
2296 return 1;
2297}
2298
2299static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2300 int blank)
2301{
994efacd
RP		 2302 struct fb_event event;
2303
1da177e4
LT		 2304 if (blank) {
2305 unsigned short charmask = vc->vc_hi_font_mask ?
2306 0x1ff : 0xff;
2307 unsigned short oldc;
2308
2309 oldc = vc->vc_video_erase_char;
2310 vc->vc_video_erase_char &= charmask;
2311 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2312 vc->vc_video_erase_char = oldc;
2313 }
994efacd
RP		 2314
2315
513adb58
AR		 2316 if (!lock_fb_info(info))
2317 return;
994efacd
RP		 2318 event.info = info;
2319 event.data = &blank;
2320 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
513adb58 2321 unlock_fb_info(info);
1da177e4
LT		 2322}
2323
2324static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2325{
2326 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2327 struct fbcon_ops *ops = info->fbcon_par;
2328
2329 if (mode_switch) {
2330 struct fb_var_screeninfo var = info->var;
2331
2332 ops->graphics = 1;
2333
2334 if (!blank) {
2335 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2336 fb_set_var(info, &var);
2337 ops->graphics = 0;
e4fc2761 2338 ops->var = info->var;
f5c15d0b 2339 }
1da177e4
LT		 2340 }
2341
2342 if (!fbcon_is_inactive(vc, info)) {
2343 if (ops->blank_state != blank) {
2344 ops->blank_state = blank;
2345 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2346 ops->cursor_flash = (!blank);
2347
bca404af
DB		 2348 if (!(info->flags & FBINFO_MISC_USEREVENT))
2349 if (fb_blank(info, blank))
2350 fbcon_generic_blank(vc, info, blank);
1da177e4
LT		 2351 }
2352
88fb2c6e
AD		 2353 if (!blank)
2354 update_screen(vc);
2355 }
2356
4d8a2d98 2357 if (mode_switch || fbcon_is_inactive(vc, info) ||
212f2639 2358 ops->blank_state != FB_BLANK_UNBLANK)
88fb2c6e 2359 fbcon_del_cursor_timer(info);
212f2639
AD		 2360 else
2361 fbcon_add_cursor_timer(info);
1da177e4 2362
88fb2c6e 2363 return 0;
1da177e4
LT		 2364}
2365
d219adc1
JB		 2366static int fbcon_debug_enter(struct vc_data *vc)
2367{
2368 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2369 struct fbcon_ops *ops = info->fbcon_par;
2370
2371 ops->save_graphics = ops->graphics;
2372 ops->graphics = 0;
2373 if (info->fbops->fb_debug_enter)
2374 info->fbops->fb_debug_enter(info);
2375 fbcon_set_palette(vc, color_table);
2376 return 0;
2377}
2378
2379static int fbcon_debug_leave(struct vc_data *vc)
2380{
2381 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2382 struct fbcon_ops *ops = info->fbcon_par;
2383
2384 ops->graphics = ops->save_graphics;
2385 if (info->fbops->fb_debug_leave)
2386 info->fbops->fb_debug_leave(info);
2387 return 0;
2388}
2389
1da177e4
LT		 2390static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2391{
2392 u8 *fontdata = vc->vc_font.data;
2393 u8 *data = font->data;
2394 int i, j;
2395
2396 font->width = vc->vc_font.width;
2397 font->height = vc->vc_font.height;
2398 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2399 if (!font->data)
2400 return 0;
2401
2402 if (font->width <= 8) {
2403 j = vc->vc_font.height;
2404 for (i = 0; i < font->charcount; i++) {
2405 memcpy(data, fontdata, j);
2406 memset(data + j, 0, 32 - j);
2407 data += 32;
2408 fontdata += j;
2409 }
2410 } else if (font->width <= 16) {
2411 j = vc->vc_font.height * 2;
2412 for (i = 0; i < font->charcount; i++) {
2413 memcpy(data, fontdata, j);
2414 memset(data + j, 0, 64 - j);
2415 data += 64;
2416 fontdata += j;
2417 }
2418 } else if (font->width <= 24) {
2419 for (i = 0; i < font->charcount; i++) {
2420 for (j = 0; j < vc->vc_font.height; j++) {
2421 *data++ = fontdata[0];
2422 *data++ = fontdata[1];
2423 *data++ = fontdata[2];
2424 fontdata += sizeof(u32);
2425 }
2426 memset(data, 0, 3 * (32 - j));
2427 data += 3 * (32 - j);
2428 }
2429 } else {
2430 j = vc->vc_font.height * 4;
2431 for (i = 0; i < font->charcount; i++) {
2432 memcpy(data, fontdata, j);
2433 memset(data + j, 0, 128 - j);
2434 data += 128;
2435 fontdata += j;
2436 }
2437 }
2438 return 0;
2439}
2440
2441static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2442 const u8 * data, int userfont)
1da177e4
LT		 2443{
2444 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2445 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2446 struct display *p = &fb_display[vc->vc_num];
2447 int resize;
2448 int cnt;
2449 char *old_data = NULL;
2450
2451 if (CON_IS_VISIBLE(vc) && softback_lines)
2452 fbcon_set_origin(vc);
2453
2454 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2455 if (p->userfont)
2456 old_data = vc->vc_font.data;
2457 if (userfont)
2458 cnt = FNTCHARCNT(data);
2459 else
2460 cnt = 256;
2f4516db 2461 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2462 if ((p->userfont = userfont))
2463 REFCOUNT(data)++;
2464 vc->vc_font.width = w;
2465 vc->vc_font.height = h;
2466 if (vc->vc_hi_font_mask && cnt == 256) {
2467 vc->vc_hi_font_mask = 0;
2468 if (vc->vc_can_do_color) {
2469 vc->vc_complement_mask >>= 1;
2470 vc->vc_s_complement_mask >>= 1;
2471 }
2472
2473 /* ++Edmund: reorder the attribute bits */
2474 if (vc->vc_can_do_color) {
2475 unsigned short *cp =
2476 (unsigned short *) vc->vc_origin;
2477 int count = vc->vc_screenbuf_size / 2;
2478 unsigned short c;
2479 for (; count > 0; count--, cp++) {
2480 c = scr_readw(cp);
2481 scr_writew(((c & 0xfe00) >> 1) |
2482 (c & 0xff), cp);
2483 }
2484 c = vc->vc_video_erase_char;
2485 vc->vc_video_erase_char =
2486 ((c & 0xfe00) >> 1) | (c & 0xff);
2487 vc->vc_attr >>= 1;
2488 }
2489 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2490 vc->vc_hi_font_mask = 0x100;
2491 if (vc->vc_can_do_color) {
2492 vc->vc_complement_mask <<= 1;
2493 vc->vc_s_complement_mask <<= 1;
2494 }
2495
2496 /* ++Edmund: reorder the attribute bits */
2497 {
2498 unsigned short *cp =
2499 (unsigned short *) vc->vc_origin;
2500 int count = vc->vc_screenbuf_size / 2;
2501 unsigned short c;
2502 for (; count > 0; count--, cp++) {
2503 unsigned short newc;
2504 c = scr_readw(cp);
2505 if (vc->vc_can_do_color)
2506 newc =
2507 ((c & 0xff00) << 1) | (c &
2508 0xff);
2509 else
2510 newc = c & ~0x100;
2511 scr_writew(newc, cp);
2512 }
2513 c = vc->vc_video_erase_char;
2514 if (vc->vc_can_do_color) {
2515 vc->vc_video_erase_char =
2516 ((c & 0xff00) << 1) | (c & 0xff);
2517 vc->vc_attr <<= 1;
93f78da4 2518 } else
1da177e4
LT		 2519 vc->vc_video_erase_char = c & ~0x100;
2520 }
2521
2522 }
2523
2524 if (resize) {
e4fc2761
AD		 2525 int cols, rows;
2526
2527 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2528 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2529 cols /= w;
2530 rows /= h;
2531 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2532 if (CON_IS_VISIBLE(vc) && softback_buf)
2533 fbcon_update_softback(vc);
1da177e4
LT		 2534 } else if (CON_IS_VISIBLE(vc)
2535 && vc->vc_mode == KD_TEXT) {
2536 fbcon_clear_margins(vc, 0);
2537 update_screen(vc);
2538 }
2539
2540 if (old_data && (--REFCOUNT(old_data) == 0))
2541 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2542 return 0;
2543}
2544
2545static int fbcon_copy_font(struct vc_data *vc, int con)
2546{
2547 struct display *od = &fb_display[con];
2548 struct console_font *f = &vc->vc_font;
2549
2550 if (od->fontdata == f->data)
2551 return 0; /* already the same font... */
2552 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2553}
2554
2555/*
2556 * User asked to set font; we are guaranteed that
2557 * a) width and height are in range 1..32
2558 * b) charcount does not exceed 512
2559 * but lets not assume that, since someone might someday want to use larger
2560 * fonts. And charcount of 512 is small for unicode support.
2561 *
2562 * However, user space gives the font in 32 rows , regardless of
2563 * actual font height. So a new API is needed if support for larger fonts
2564 * is ever implemented.
2565 */
2566
2567static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2568{
2d2699d9 2569 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1da177e4
LT		 2570 unsigned charcount = font->charcount;
2571 int w = font->width;
2572 int h = font->height;
2573 int size;
2574 int i, csum;
2575 u8 *new_data, *data = font->data;
2576 int pitch = (font->width+7) >> 3;
2577
2578 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2579 * If not this check should be changed to charcount < 256 */
2580 if (charcount != 256 && charcount != 512)
2581 return -EINVAL;
2582
2d2699d9
AD		 2583 /* Make sure drawing engine can handle the font */
2584 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2585 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2586 return -EINVAL;
38b4982c
AD		 2587
2588 /* Make sure driver can handle the font length */
2589 if (fbcon_invalid_charcount(info, charcount))
2590 return -EINVAL;
2d2699d9 2591
1da177e4
LT		 2592 size = h * pitch * charcount;
2593
2594 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2595
2596 if (!new_data)
2597 return -ENOMEM;
2598
2599 new_data += FONT_EXTRA_WORDS * sizeof(int);
2600 FNTSIZE(new_data) = size;
2601 FNTCHARCNT(new_data) = charcount;
2602 REFCOUNT(new_data) = 0; /* usage counter */
2603 for (i=0; i< charcount; i++) {
2604 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2605 }
2606
2607 /* Since linux has a nice crc32 function use it for counting font
2608 * checksums. */
2609 csum = crc32(0, new_data, size);
2610
2611 FNTSUM(new_data) = csum;
2612 /* Check if the same font is on some other console already */
e614b18d 2613 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2614 struct vc_data *tmp = vc_cons[i].d;
2615
2616 if (fb_display[i].userfont &&
2617 fb_display[i].fontdata &&
2618 FNTSUM(fb_display[i].fontdata) == csum &&
2619 FNTSIZE(fb_display[i].fontdata) == size &&
2620 tmp->vc_font.width == w &&
2621 !memcmp(fb_display[i].fontdata, new_data, size)) {
2622 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2623 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2624 break;
2625 }
2626 }
2627 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2628}
2629
2630static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2631{
2632 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2633 const struct font_desc *f;
1da177e4
LT		 2634
2635 if (!name)
2d2699d9
AD		 2636 f = get_default_font(info->var.xres, info->var.yres,
2637 info->pixmap.blit_x, info->pixmap.blit_y);
1da177e4
LT		 2638 else if (!(f = find_font(name)))
2639 return -ENOENT;
2640
2641 font->width = f->width;
2642 font->height = f->height;
2643 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2644}
2645
2646static u16 palette_red[16];
2647static u16 palette_green[16];
2648static u16 palette_blue[16];
2649
2650static struct fb_cmap palette_cmap = {
2651 0, 16, palette_red, palette_green, palette_blue, NULL
2652};
2653
709280da 2654static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
1da177e4
LT		 2655{
2656 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2657 int i, j, k, depth;
2658 u8 val;
2659
2660 if (fbcon_is_inactive(vc, info))
709280da 2661 return;
1da177e4
LT		 2662
2663 if (!CON_IS_VISIBLE(vc))
709280da 2664 return;
1da177e4 2665
b8c90945 2666 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2667 if (depth > 3) {
2668 for (i = j = 0; i < 16; i++) {
2669 k = table[i];
2670 val = vc->vc_palette[j++];
2671 palette_red[k] = (val << 8) | val;
2672 val = vc->vc_palette[j++];
2673 palette_green[k] = (val << 8) | val;
2674 val = vc->vc_palette[j++];
2675 palette_blue[k] = (val << 8) | val;
2676 }
2677 palette_cmap.len = 16;
2678 palette_cmap.start = 0;
2679 /*
2680 * If framebuffer is capable of less than 16 colors,
2681 * use default palette of fbcon.
2682 */
2683 } else
2684 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2685
709280da 2686 fb_set_cmap(&palette_cmap, info);
1da177e4
LT		 2687}
2688
2689static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2690{
2691 unsigned long p;
2692 int line;
2693
2694 if (vc->vc_num != fg_console || !softback_lines)
2695 return (u16 *) (vc->vc_origin + offset);
2696 line = offset / vc->vc_size_row;
2697 if (line >= softback_lines)
2698 return (u16 *) (vc->vc_origin + offset -
2699 softback_lines * vc->vc_size_row);
2700 p = softback_curr + offset;
2701 if (p >= softback_end)
2702 p += softback_buf - softback_end;
2703 return (u16 *) p;
2704}
2705
2706static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2707 int *px, int *py)
2708{
2709 unsigned long ret;
2710 int x, y;
2711
2712 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2713 unsigned long offset = (pos - vc->vc_origin) / 2;
2714
2715 x = offset % vc->vc_cols;
2716 y = offset / vc->vc_cols;
2717 if (vc->vc_num == fg_console)
2718 y += softback_lines;
2719 ret = pos + (vc->vc_cols - x) * 2;
2720 } else if (vc->vc_num == fg_console && softback_lines) {
2721 unsigned long offset = pos - softback_curr;
2722
2723 if (pos < softback_curr)
2724 offset += softback_end - softback_buf;
2725 offset /= 2;
2726 x = offset % vc->vc_cols;
2727 y = offset / vc->vc_cols;
2728 ret = pos + (vc->vc_cols - x) * 2;
2729 if (ret == softback_end)
2730 ret = softback_buf;
2731 if (ret == softback_in)
2732 ret = vc->vc_origin;
2733 } else {
2734 /* Should not happen */
2735 x = y = 0;
2736 ret = vc->vc_origin;
2737 }
2738 if (px)
2739 *px = x;
2740 if (py)
2741 *py = y;
2742 return ret;
2743}
2744
2745/* As we might be inside of softback, we may work with non-contiguous buffer,
2746 that's why we have to use a separate routine. */
2747static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2748{
2749 while (cnt--) {
2750 u16 a = scr_readw(p);
2751 if (!vc->vc_can_do_color)
2752 a ^= 0x0800;
2753 else if (vc->vc_hi_font_mask == 0x100)
2754 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2755 (((a) & 0x0e00) << 4);
2756 else
2757 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2758 (((a) & 0x0700) << 4);
2759 scr_writew(a, p++);
2760 if (p == (u16 *) softback_end)
2761 p = (u16 *) softback_buf;
2762 if (p == (u16 *) softback_in)
2763 p = (u16 *) vc->vc_origin;
2764 }
2765}
2766
97293de9 2767static void fbcon_scrolldelta(struct vc_data *vc, int lines)
1da177e4
LT		 2768{
2769 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2770 struct fbcon_ops *ops = info->fbcon_par;
2c6cc35c 2771 struct display *disp = &fb_display[fg_console];
1da177e4
LT		 2772 int offset, limit, scrollback_old;
2773
2774 if (softback_top) {
2775 if (vc->vc_num != fg_console)
97293de9 2776 return;
1da177e4 2777 if (vc->vc_mode != KD_TEXT || !lines)
97293de9 2778 return;
1da177e4
LT		 2779 if (logo_shown >= 0) {
2780 struct vc_data *conp2 = vc_cons[logo_shown].d;
2781
2782 if (conp2->vc_top == logo_lines
2783 && conp2->vc_bottom == conp2->vc_rows)
2784 conp2->vc_top = 0;
2785 if (logo_shown == vc->vc_num) {
2786 unsigned long p, q;
2787 int i;
2788
2789 p = softback_in;
2790 q = vc->vc_origin +
2791 logo_lines * vc->vc_size_row;
2792 for (i = 0; i < logo_lines; i++) {
2793 if (p == softback_top)
2794 break;
2795 if (p == softback_buf)
2796 p = softback_end;
2797 p -= vc->vc_size_row;
2798 q -= vc->vc_size_row;
2799 scr_memcpyw((u16 *) q, (u16 *) p,
2800 vc->vc_size_row);
2801 }
308af929 2802 softback_in = softback_curr = p;
1da177e4
LT		 2803 update_region(vc, vc->vc_origin,
2804 logo_lines * vc->vc_cols);
2805 }
2806 logo_shown = FBCON_LOGO_CANSHOW;
2807 }
2808 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2c6cc35c 2809 fbcon_redraw_softback(vc, disp, lines);
1da177e4 2810 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
97293de9 2811 return;
1da177e4
LT		 2812 }
2813
2814 if (!scrollback_phys_max)
97293de9 2815 return;
1da177e4
LT		 2816
2817 scrollback_old = scrollback_current;
2818 scrollback_current -= lines;
2819 if (scrollback_current < 0)
2820 scrollback_current = 0;
2821 else if (scrollback_current > scrollback_max)
2822 scrollback_current = scrollback_max;
2823 if (scrollback_current == scrollback_old)
97293de9 2824 return;
1da177e4
LT		 2825
2826 if (fbcon_is_inactive(vc, info))
97293de9 2827 return;
1da177e4
LT		 2828
2829 fbcon_cursor(vc, CM_ERASE);
2830
2c6cc35c
MS		 2831 offset = disp->yscroll - scrollback_current;
2832 limit = disp->vrows;
2833 switch (disp->scrollmode) {
1da177e4
LT		 2834 case SCROLL_WRAP_MOVE:
2835 info->var.vmode |= FB_VMODE_YWRAP;
2836 break;
2837 case SCROLL_PAN_MOVE:
2838 case SCROLL_PAN_REDRAW:
2839 limit -= vc->vc_rows;
2840 info->var.vmode &= ~FB_VMODE_YWRAP;
2841 break;
2842 }
2843 if (offset < 0)
2844 offset += limit;
2845 else if (offset >= limit)
2846 offset -= limit;
e4fc2761
AD		 2847
2848 ops->var.xoffset = 0;
2849 ops->var.yoffset = offset * vc->vc_font.height;
2850 ops->update_start(info);
2851
1da177e4
LT		 2852 if (!scrollback_current)
2853 fbcon_cursor(vc, CM_DRAW);
1da177e4
LT		 2854}
2855
2856static int fbcon_set_origin(struct vc_data *vc)
2857{
2858 if (softback_lines)
2859 fbcon_scrolldelta(vc, softback_lines);
2860 return 0;
2861}
2862
2863static void fbcon_suspended(struct fb_info *info)
2864{
2865 struct vc_data *vc = NULL;
2866 struct fbcon_ops *ops = info->fbcon_par;
2867
2868 if (!ops || ops->currcon < 0)
2869 return;
2870 vc = vc_cons[ops->currcon].d;
2871
2872 /* Clear cursor, restore saved data */
2873 fbcon_cursor(vc, CM_ERASE);
2874}
2875
2876static void fbcon_resumed(struct fb_info *info)
2877{
2878 struct vc_data *vc;
2879 struct fbcon_ops *ops = info->fbcon_par;
2880
2881 if (!ops || ops->currcon < 0)
2882 return;
2883 vc = vc_cons[ops->currcon].d;
2884
2885 update_screen(vc);
2886}
2887
2888static void fbcon_modechanged(struct fb_info *info)
2889{
2890 struct fbcon_ops *ops = info->fbcon_par;
2891 struct vc_data *vc;
2892 struct display *p;
2893 int rows, cols;
2894
2895 if (!ops || ops->currcon < 0)
2896 return;
2897 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2898 if (vc->vc_mode != KD_TEXT ||
2899 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2900 return;
2901
2902 p = &fb_display[vc->vc_num];
b73deed3 2903 set_blitting_type(vc, info);
1da177e4
LT		 2904
2905 if (CON_IS_VISIBLE(vc)) {
2906 var_to_display(p, &info->var, info);
e4fc2761
AD		 2907 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2908 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2909 cols /= vc->vc_font.width;
2910 rows /= vc->vc_font.height;
1da177e4
LT		 2911 vc_resize(vc, cols, rows);
2912 updatescrollmode(p, info, vc);
2913 scrollback_max = 0;
2914 scrollback_current = 0;
4e1567d3
AD		 2915
2916 if (!fbcon_is_inactive(vc, info)) {
2917 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2918 ops->update_start(info);
2919 }
2920
1da177e4
LT		 2921 fbcon_set_palette(vc, color_table);
2922 update_screen(vc);
4d9c5b6e
AD		 2923 if (softback_buf)
2924 fbcon_update_softback(vc);
1da177e4
LT		 2925 }
2926}
2927
7726e9e1
AD		 2928static void fbcon_set_all_vcs(struct fb_info *info)
2929{
2930 struct fbcon_ops *ops = info->fbcon_par;
2931 struct vc_data *vc;
2932 struct display *p;
95d67bb1 2933 int i, rows, cols, fg = -1;
7726e9e1
AD		 2934
2935 if (!ops || ops->currcon < 0)
2936 return;
2937
e614b18d 2938 for (i = first_fb_vc; i <= last_fb_vc; i++) {
7726e9e1
AD		 2939 vc = vc_cons[i].d;
2940 if (!vc || vc->vc_mode != KD_TEXT ||
2941 registered_fb[con2fb_map[i]] != info)
2942 continue;
2943
95d67bb1
AD		 2944 if (CON_IS_VISIBLE(vc)) {
2945 fg = i;
2946 continue;
2947 }
2948
7726e9e1 2949 p = &fb_display[vc->vc_num];
b73deed3 2950 set_blitting_type(vc, info);
7726e9e1 2951 var_to_display(p, &info->var, info);
232fb69a
ON		 2952 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2953 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
e4fc2761
AD		 2954 cols /= vc->vc_font.width;
2955 rows /= vc->vc_font.height;
7726e9e1 2956 vc_resize(vc, cols, rows);
7726e9e1 2957 }
04a2fe57 2958
95d67bb1
AD		 2959 if (fg != -1)
2960 fbcon_modechanged(info);
7726e9e1
AD		 2961}
2962
1da177e4
LT		 2963static int fbcon_mode_deleted(struct fb_info *info,
2964 struct fb_videomode *mode)
2965{
2966 struct fb_info *fb_info;
2967 struct display *p;
2968 int i, j, found = 0;
2969
2970 /* before deletion, ensure that mode is not in use */
2971 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2972 j = con2fb_map[i];
2973 if (j == -1)
2974 continue;
2975 fb_info = registered_fb[j];
2976 if (fb_info != info)
2977 continue;
2978 p = &fb_display[i];
2979 if (!p || !p->mode)
2980 continue;
2981 if (fb_mode_is_equal(p->mode, mode)) {
2982 found = 1;
2983 break;
2984 }
2985 }
2986 return found;
2987}
2988
cfafca80
JB		 2989#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2990static int fbcon_unbind(void)
2991{
2992 int ret;
2993
e93a9a86 2994 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
cfafca80 2995 fbcon_is_default);
2ddce3fd
IA		 2996
2997 if (!ret)
2998 fbcon_has_console_bind = 0;
2999
cfafca80
JB		 3000 return ret;
3001}
3002#else
3003static inline int fbcon_unbind(void)
3004{
3005 return -EINVAL;
3006}
3007#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3008
054430e7 3009/* called with console_lock held */
cfafca80
JB		 3010static int fbcon_fb_unbind(int idx)
3011{
3012 int i, new_idx = -1, ret = 0;
3013
2ddce3fd
IA		 3014 if (!fbcon_has_console_bind)
3015 return 0;
3016
cfafca80
JB		 3017 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3018 if (con2fb_map[i] != idx &&
3019 con2fb_map[i] != -1) {
3020 new_idx = i;
3021 break;
3022 }
3023 }
3024
3025 if (new_idx != -1) {
3026 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3027 if (con2fb_map[i] == idx)
3028 set_con2fb_map(i, new_idx, 0);
3029 }
5f4dc28b
KP		 3030 } else {
3031 struct fb_info *info = registered_fb[idx];
3032
3033 /* This is sort of like set_con2fb_map, except it maps
3034 * the consoles to no device and then releases the
3035 * oldinfo to free memory and cancel the cursor blink
3036 * timer. I can imagine this just becoming part of
3037 * set_con2fb_map where new_idx is -1
3038 */
3039 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3040 if (con2fb_map[i] == idx) {
3041 con2fb_map[i] = -1;
3042 if (!search_fb_in_map(idx)) {
3043 ret = con2fb_release_oldinfo(vc_cons[i].d,
3044 info, NULL, i,
3045 idx, 0);
3046 if (ret) {
3047 con2fb_map[i] = idx;
3048 return ret;
3049 }
3050 }
3051 }
3052 }
cfafca80 3053 ret = fbcon_unbind();
5f4dc28b 3054 }
cfafca80
JB		 3055
3056 return ret;
3057}
3058
054430e7 3059/* called with console_lock held */
623e71b0 3060static int fbcon_fb_unregistered(struct fb_info *info)
e614b18d 3061{
66c1ca01 3062 int i, idx;
e614b18d 3063
66c1ca01 3064 idx = info->node;
e614b18d
AD		 3065 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3066 if (con2fb_map[i] == idx)
3067 con2fb_map[i] = -1;
3068 }
3069
3070 if (idx == info_idx) {
3071 info_idx = -1;
3072
3073 for (i = 0; i < FB_MAX; i++) {
3074 if (registered_fb[i] != NULL) {
3075 info_idx = i;
3076 break;
3077 }
3078 }
3079 }
3080
3081 if (info_idx != -1) {
3082 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3083 if (con2fb_map[i] == -1)
3084 con2fb_map[i] = info_idx;
3085 }
3086 }
3087
623e71b0
AD		 3088 if (primary_device == idx)
3089 primary_device = -1;
3090
66c1ca01 3091 if (!num_registered_fb)
e93a9a86 3092 do_unregister_con_driver(&fb_con);
66c1ca01 3093
623e71b0
AD		 3094 return 0;
3095}
3096
054430e7 3097/* called with console_lock held */
6a9ee8af
DA		 3098static void fbcon_remap_all(int idx)
3099{
3100 int i;
3101 for (i = first_fb_vc; i <= last_fb_vc; i++)
3102 set_con2fb_map(i, idx, 0);
3103
3104 if (con_is_bound(&fb_con)) {
3105 printk(KERN_INFO "fbcon: Remapping primary device, "
3106 "fb%i, to tty %i-%i\n", idx,
3107 first_fb_vc + 1, last_fb_vc + 1);
3108 info_idx = idx;
3109 }
3110}
3111
623e71b0 3112#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
afd1db16 3113static void fbcon_select_primary(struct fb_info *info)
623e71b0 3114{
623e71b0
AD		 3115 if (!map_override && primary_device == -1 &&
3116 fb_is_primary_device(info)) {
afd1db16 3117 int i;
623e71b0 3118
afd1db16
AD		 3119 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3120 info->fix.id, info->node);
623e71b0
AD		 3121 primary_device = info->node;
3122
afd1db16 3123 for (i = first_fb_vc; i <= last_fb_vc; i++)
623e71b0 3124 con2fb_map_boot[i] = primary_device;
623e71b0 3125
afd1db16
AD		 3126 if (con_is_bound(&fb_con)) {
3127 printk(KERN_INFO "fbcon: Remapping primary device, "
3128 "fb%i, to tty %i-%i\n", info->node,
3129 first_fb_vc + 1, last_fb_vc + 1);
3130 info_idx = primary_device;
623e71b0 3131 }
623e71b0
AD		 3132 }
3133
623e71b0
AD		 3134}
3135#else
afd1db16 3136static inline void fbcon_select_primary(struct fb_info *info)
623e71b0 3137{
afd1db16 3138 return;
e614b18d 3139}
623e71b0 3140#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
e614b18d 3141
054430e7 3142/* called with console_lock held */
623e71b0 3143static int fbcon_fb_registered(struct fb_info *info)
1da177e4 3144{
66c1ca01 3145 int ret = 0, i, idx;
623e71b0 3146
66c1ca01 3147 idx = info->node;
afd1db16 3148 fbcon_select_primary(info);
1da177e4
LT		 3149
3150 if (info_idx == -1) {
e614b18d 3151 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3152 if (con2fb_map_boot[i] == idx) {
3153 info_idx = idx;
3154 break;
3155 }
3156 }
e614b18d 3157
1da177e4 3158 if (info_idx != -1)
50e244cc 3159 ret = do_fbcon_takeover(1);
1da177e4 3160 } else {
e614b18d 3161 for (i = first_fb_vc; i <= last_fb_vc; i++) {
d1baa4ff 3162 if (con2fb_map_boot[i] == idx)
1da177e4
LT		 3163 set_con2fb_map(i, idx, 0);
3164 }
3165 }
3166
3167 return ret;
3168}
3169
3170static void fbcon_fb_blanked(struct fb_info *info, int blank)
3171{
3172 struct fbcon_ops *ops = info->fbcon_par;
3173 struct vc_data *vc;
3174
3175 if (!ops || ops->currcon < 0)
3176 return;
3177
3178 vc = vc_cons[ops->currcon].d;
3179 if (vc->vc_mode != KD_TEXT ||
3180 registered_fb[con2fb_map[ops->currcon]] != info)
3181 return;
3182
3183 if (CON_IS_VISIBLE(vc)) {
3184 if (blank)
3185 do_blank_screen(0);
3186 else
3187 do_unblank_screen(0);
3188 }
3189 ops->blank_state = blank;
3190}
3191
3192static void fbcon_new_modelist(struct fb_info *info)
3193{
3194 int i;
3195 struct vc_data *vc;
3196 struct fb_var_screeninfo var;
9791d763 3197 const struct fb_videomode *mode;
1da177e4 3198
e614b18d 3199 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3200 if (registered_fb[con2fb_map[i]] != info)
3201 continue;
3202 if (!fb_display[i].mode)
3203 continue;
3204 vc = vc_cons[i].d;
3205 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 3206 mode = fb_find_nearest_mode(fb_display[i].mode,
3207 &info->modelist);
1da177e4 3208 fb_videomode_to_var(&var, mode);
d1baa4ff 3209 fbcon_set_disp(info, &var, vc->vc_num);
1da177e4
LT		 3210 }
3211}
3212
38a3dc51
AD		 3213static void fbcon_get_requirement(struct fb_info *info,
3214 struct fb_blit_caps *caps)
3215{
3216 struct vc_data *vc;
3217 struct display *p;
38a3dc51
AD		 3218
3219 if (caps->flags) {
167f07f1 3220 int i, charcnt;
38a3dc51
AD		 3221
3222 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3223 vc = vc_cons[i].d;
167f07f1
AD		 3224 if (vc && vc->vc_mode == KD_TEXT &&
3225 info->node == con2fb_map[i]) {
38a3dc51
AD		 3226 p = &fb_display[i];
3227 caps->x |= 1 << (vc->vc_font.width - 1);
3228 caps->y |= 1 << (vc->vc_font.height - 1);
3229 charcnt = (p->userfont) ?
3230 FNTCHARCNT(p->fontdata) : 256;
3231 if (caps->len < charcnt)
3232 caps->len = charcnt;
3233 }
3234 }
3235 } else {
3236 vc = vc_cons[fg_console].d;
3237
167f07f1
AD		 3238 if (vc && vc->vc_mode == KD_TEXT &&
3239 info->node == con2fb_map[fg_console]) {
38a3dc51 3240 p = &fb_display[fg_console];
167f07f1
AD		 3241 caps->x = 1 << (vc->vc_font.width - 1);
3242 caps->y = 1 << (vc->vc_font.height - 1);
3243 caps->len = (p->userfont) ?
38a3dc51 3244 FNTCHARCNT(p->fontdata) : 256;
38a3dc51
AD		 3245 }
3246 }
3247}
3248
66c1ca01 3249static int fbcon_event_notify(struct notifier_block *self,
1da177e4
LT		 3250 unsigned long action, void *data)
3251{
3252 struct fb_event *event = data;
3253 struct fb_info *info = event->info;
3254 struct fb_videomode *mode;
3255 struct fb_con2fbmap *con2fb;
38a3dc51 3256 struct fb_blit_caps *caps;
66c1ca01 3257 int idx, ret = 0;
1da177e4 3258
e614b18d
AD		 3259 /*
3260 * ignore all events except driver registration and deregistration
3261 * if fbcon is not active
3262 */
3263 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3264 action == FB_EVENT_FB_UNREGISTERED))
3265 goto done;
3266
1da177e4
LT		 3267 switch(action) {
3268 case FB_EVENT_SUSPEND:
3269 fbcon_suspended(info);
3270 break;
3271 case FB_EVENT_RESUME:
3272 fbcon_resumed(info);
3273 break;
3274 case FB_EVENT_MODE_CHANGE:
3275 fbcon_modechanged(info);
3276 break;
7726e9e1
AD		 3277 case FB_EVENT_MODE_CHANGE_ALL:
3278 fbcon_set_all_vcs(info);
3279 break;
1da177e4
LT		 3280 case FB_EVENT_MODE_DELETE:
3281 mode = event->data;
3282 ret = fbcon_mode_deleted(info, mode);
3283 break;
cfafca80 3284 case FB_EVENT_FB_UNBIND:
66c1ca01 3285 idx = info->node;
66c1ca01 3286 ret = fbcon_fb_unbind(idx);
cfafca80 3287 break;
1da177e4 3288 case FB_EVENT_FB_REGISTERED:
623e71b0 3289 ret = fbcon_fb_registered(info);
1da177e4 3290 break;
e614b18d 3291 case FB_EVENT_FB_UNREGISTERED:
623e71b0 3292 ret = fbcon_fb_unregistered(info);
e614b18d 3293 break;
1da177e4 3294 case FB_EVENT_SET_CONSOLE_MAP:
054430e7 3295 /* called with console lock held */
1da177e4
LT		 3296 con2fb = event->data;
3297 ret = set_con2fb_map(con2fb->console - 1,
3298 con2fb->framebuffer, 1);
3299 break;
3300 case FB_EVENT_GET_CONSOLE_MAP:
3301 con2fb = event->data;
3302 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3303 break;
3304 case FB_EVENT_BLANK:
3305 fbcon_fb_blanked(info, *(int *)event->data);
3306 break;
3307 case FB_EVENT_NEW_MODELIST:
3308 fbcon_new_modelist(info);
3309 break;
38a3dc51
AD		 3310 case FB_EVENT_GET_REQ:
3311 caps = event->data;
3312 fbcon_get_requirement(info, caps);
3313 break;
6a9ee8af
DA		 3314 case FB_EVENT_REMAP_ALL_CONSOLE:
3315 idx = info->node;
3316 fbcon_remap_all(idx);
3317 break;
1da177e4 3318 }
e614b18d 3319done:
1da177e4
LT		 3320 return ret;
3321}
3322
3323/*
3324 * The console `switch' structure for the frame buffer based console
3325 */
3326
3327static const struct consw fb_con = {
3328 .owner = THIS_MODULE,
3329 .con_startup = fbcon_startup,
3330 .con_init = fbcon_init,
3331 .con_deinit = fbcon_deinit,
3332 .con_clear = fbcon_clear,
3333 .con_putc = fbcon_putc,
3334 .con_putcs = fbcon_putcs,
3335 .con_cursor = fbcon_cursor,
3336 .con_scroll = fbcon_scroll,
1da177e4
LT		 3337 .con_switch = fbcon_switch,
3338 .con_blank = fbcon_blank,
3339 .con_font_set = fbcon_set_font,
3340 .con_font_get = fbcon_get_font,
3341 .con_font_default = fbcon_set_def_font,
3342 .con_font_copy = fbcon_copy_font,
3343 .con_set_palette = fbcon_set_palette,
3344 .con_scrolldelta = fbcon_scrolldelta,
3345 .con_set_origin = fbcon_set_origin,
3346 .con_invert_region = fbcon_invert_region,
3347 .con_screen_pos = fbcon_screen_pos,
3348 .con_getxy = fbcon_getxy,
3349 .con_resize = fbcon_resize,
d219adc1
JB		 3350 .con_debug_enter = fbcon_debug_enter,
3351 .con_debug_leave = fbcon_debug_leave,
1da177e4
LT		 3352};
3353
3354static struct notifier_block fbcon_event_notifier = {
3355 .notifier_call = fbcon_event_notify,
3356};
3357
0c6c1ce0
AD		 3358static ssize_t store_rotate(struct device *device,
3359 struct device_attribute *attr, const char *buf,
3360 size_t count)
9a179176
AD		 3361{
3362 struct fb_info *info;
3363 int rotate, idx;
3364 char **last = NULL;
3365
e614b18d
AD		 3366 if (fbcon_has_exited)
3367 return count;
3368
ac751efa 3369 console_lock();
9a179176
AD		 3370 idx = con2fb_map[fg_console];
3371
3372 if (idx == -1 || registered_fb[idx] == NULL)
3373 goto err;
3374
3375 info = registered_fb[idx];
3376 rotate = simple_strtoul(buf, last, 0);
3377 fbcon_rotate(info, rotate);
3378err:
ac751efa 3379 console_unlock();
9a179176
AD		 3380 return count;
3381}
3382
0c6c1ce0
AD		 3383static ssize_t store_rotate_all(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_all(info, rotate);
3403err:
ac751efa 3404 console_unlock();
9a179176
AD		 3405 return count;
3406}
3407
0c6c1ce0
AD		 3408static ssize_t show_rotate(struct device *device,
3409 struct device_attribute *attr,char *buf)
9a179176
AD		 3410{
3411 struct fb_info *info;
3412 int rotate = 0, idx;
3413
e614b18d
AD		 3414 if (fbcon_has_exited)
3415 return 0;
3416
ac751efa 3417 console_lock();
9a179176
AD		 3418 idx = con2fb_map[fg_console];
3419
3420 if (idx == -1 || registered_fb[idx] == NULL)
3421 goto err;
3422
3423 info = registered_fb[idx];
3424 rotate = fbcon_get_rotate(info);
3425err:
ac751efa 3426 console_unlock();
9a179176
AD		 3427 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3428}
3429
0c6c1ce0
AD		 3430static ssize_t show_cursor_blink(struct device *device,
3431 struct device_attribute *attr, char *buf)
acba9cd0
AD		 3432{
3433 struct fb_info *info;
3434 struct fbcon_ops *ops;
3435 int idx, blink = -1;
3436
3437 if (fbcon_has_exited)
3438 return 0;
3439
ac751efa 3440 console_lock();
acba9cd0
AD		 3441 idx = con2fb_map[fg_console];
3442
3443 if (idx == -1 || registered_fb[idx] == NULL)
3444 goto err;
3445
3446 info = registered_fb[idx];
3447 ops = info->fbcon_par;
3448
3449 if (!ops)
3450 goto err;
3451
3452 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3453err:
ac751efa 3454 console_unlock();
acba9cd0
AD		 3455 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3456}
3457
0c6c1ce0
AD		 3458static ssize_t store_cursor_blink(struct device *device,
3459 struct device_attribute *attr,
acba9cd0
AD		 3460 const char *buf, size_t count)
3461{
3462 struct fb_info *info;
3463 int blink, idx;
3464 char **last = NULL;
3465
3466 if (fbcon_has_exited)
3467 return count;
3468
ac751efa 3469 console_lock();
acba9cd0
AD		 3470 idx = con2fb_map[fg_console];
3471
3472 if (idx == -1 || registered_fb[idx] == NULL)
3473 goto err;
3474
3475 info = registered_fb[idx];
3476
3477 if (!info->fbcon_par)
3478 goto err;
3479
3480 blink = simple_strtoul(buf, last, 0);
3481
3482 if (blink) {
3483 fbcon_cursor_noblink = 0;
3484 fbcon_add_cursor_timer(info);
3485 } else {
3486 fbcon_cursor_noblink = 1;
3487 fbcon_del_cursor_timer(info);
3488 }
3489
3490err:
ac751efa 3491 console_unlock();
acba9cd0
AD		 3492 return count;
3493}
3494
0c6c1ce0 3495static struct device_attribute device_attrs[] = {
9a179176
AD		 3496 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3497 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
acba9cd0
AD		 3498 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3499 store_cursor_blink),
9a179176
AD		 3500};
3501
0c6c1ce0 3502static int fbcon_init_device(void)
9a179176 3503{
0a727dea
AD		 3504 int i, error = 0;
3505
3506 fbcon_has_sysfs = 1;
3507
0c6c1ce0
AD		 3508 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3509 error = device_create_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3510
3511 if (error)
3512 break;
3513 }
3514
3515 if (error) {
3516 while (--i >= 0)
0c6c1ce0 3517 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3518
3519 fbcon_has_sysfs = 0;
3520 }
9a179176 3521
9a179176
AD		 3522 return 0;
3523}
3524
5428b044 3525static void fbcon_start(void)
1da177e4 3526{
5428b044
AD		 3527 if (num_registered_fb) {
3528 int i;
9a179176 3529
ac751efa 3530 console_lock();
1da177e4 3531
1da177e4
LT		 3532 for (i = 0; i < FB_MAX; i++) {
3533 if (registered_fb[i] != NULL) {
3534 info_idx = i;
3535 break;
3536 }
3537 }
5428b044 3538
e57f35d4 3539 do_fbcon_takeover(0);
ac751efa 3540 console_unlock();
e57f35d4 3541
1da177e4 3542 }
9a179176
AD		 3543}
3544
5428b044 3545static void fbcon_exit(void)
9a179176 3546{
e55186fe
AD		 3547 struct fb_info *info;
3548 int i, j, mapped;
3549
e614b18d
AD		 3550 if (fbcon_has_exited)
3551 return;
3552
e55186fe 3553 kfree((void *)softback_buf);
5428b044 3554 softback_buf = 0UL;
e55186fe
AD		 3555
3556 for (i = 0; i < FB_MAX; i++) {
142092e5 3557 int pending = 0;
beaa4867 3558
e55186fe
AD		 3559 mapped = 0;
3560 info = registered_fb[i];
3561
3562 if (info == NULL)
3563 continue;
3564
142092e5
JP		 3565 if (info->queue.func)
3566 pending = cancel_work_sync(&info->queue);
beaa4867
GL		 3567 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3568 "no"));
3569
e614b18d 3570 for (j = first_fb_vc; j <= last_fb_vc; j++) {
5aa133d6 3571 if (con2fb_map[j] == i) {
e55186fe 3572 mapped = 1;
5aa133d6
WY		 3573 break;
3574 }
e55186fe
AD		 3575 }
3576
3577 if (mapped) {
3578 if (info->fbops->fb_release)
3579 info->fbops->fb_release(info, 0);
3580 module_put(info->fbops->owner);
5428b044
AD		 3581
3582 if (info->fbcon_par) {
e299dd4d
DJ		 3583 struct fbcon_ops *ops = info->fbcon_par;
3584
5428b044 3585 fbcon_del_cursor_timer(info);
e299dd4d 3586 kfree(ops->cursor_src);
46862145 3587 kfree(ops->cursor_state.mask);
5428b044
AD		 3588 kfree(info->fbcon_par);
3589 info->fbcon_par = NULL;
3590 }
3591
3592 if (info->queue.func == fb_flashcursor)
3593 info->queue.func = NULL;
e55186fe
AD		 3594 }
3595 }
3596
e614b18d 3597 fbcon_has_exited = 1;
5428b044
AD		 3598}
3599
3600static int __init fb_console_init(void)
3601{
3602 int i;
3603
ac751efa 3604 console_lock();
5428b044 3605 fb_register_client(&fbcon_event_notifier);
77997aaa
GKH		 3606 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3607 "fbcon");
5428b044 3608
0c6c1ce0
AD		 3609 if (IS_ERR(fbcon_device)) {
3610 printk(KERN_WARNING "Unable to create device "
5428b044 3611 "for fbcon; errno = %ld\n",
0c6c1ce0
AD		 3612 PTR_ERR(fbcon_device));
3613 fbcon_device = NULL;
5428b044 3614 } else
0c6c1ce0 3615 fbcon_init_device();
5428b044
AD		 3616
3617 for (i = 0; i < MAX_NR_CONSOLES; i++)
3618 con2fb_map[i] = -1;
3619
ac751efa 3620 console_unlock();
5428b044
AD		 3621 fbcon_start();
3622 return 0;
3623}
3624
ba168a3c 3625fs_initcall(fb_console_init);
5428b044
AD		 3626
3627#ifdef MODULE
3628
0c6c1ce0 3629static void __exit fbcon_deinit_device(void)
5428b044
AD		 3630{
3631 int i;
3632
0a727dea 3633 if (fbcon_has_sysfs) {
0c6c1ce0
AD		 3634 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3635 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3636
3637 fbcon_has_sysfs = 0;
3638 }
9a179176
AD		 3639}
3640
1da177e4
LT		 3641static void __exit fb_console_exit(void)
3642{
ac751efa 3643 console_lock();
1da177e4 3644 fb_unregister_client(&fbcon_event_notifier);
0c6c1ce0
AD		 3645 fbcon_deinit_device();
3646 device_destroy(fb_class, MKDEV(0, 0));
e614b18d 3647 fbcon_exit();
70125e76 3648 do_unregister_con_driver(&fb_con);
ac751efa 3649 console_unlock();
1da177e4
LT		 3650}
3651
3652module_exit(fb_console_exit);
3653
3654#endif
3655
3656MODULE_LICENSE("GPL");
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git