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