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Merge branch 'topic/ymfpci' into for-linus
[linux-block.git] / drivers / video / console / fbcon.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59#undef FBCONDEBUG
60
1da177e4
LT		 61#include <linux/module.h>
62#include <linux/types.h>
1da177e4
LT		 63#include <linux/fs.h>
64#include <linux/kernel.h>
65#include <linux/delay.h> /* MSch: for IRQ probe */
1da177e4
LT		 66#include <linux/console.h>
67#include <linux/string.h>
68#include <linux/kd.h>
69#include <linux/slab.h>
70#include <linux/fb.h>
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
LT		 79#include <asm/irq.h>
80#include <asm/system.h>
1da177e4
LT		 81
82#include "fbcon.h"
83
84#ifdef FBCONDEBUG
5ae12170 85# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
1da177e4
LT		 86#else
87# define DPRINTK(fmt, args...)
88#endif
89
90enum {
91 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
92 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
93 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
94};
95
ab767201 96static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 97
1da177e4
LT		 98static signed char con2fb_map[MAX_NR_CONSOLES];
99static signed char con2fb_map_boot[MAX_NR_CONSOLES];
49a1d28f 100
1da177e4
LT		 101static int logo_lines;
102/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
103 enums. */
104static int logo_shown = FBCON_LOGO_CANSHOW;
105/* Software scrollback */
106static int fbcon_softback_size = 32768;
107static unsigned long softback_buf, softback_curr;
108static unsigned long softback_in;
109static unsigned long softback_top, softback_end;
110static int softback_lines;
111/* console mappings */
112static int first_fb_vc;
113static int last_fb_vc = MAX_NR_CONSOLES - 1;
114static int fbcon_is_default = 1;
e614b18d 115static int fbcon_has_exited;
623e71b0 116static int primary_device = -1;
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 ||
285 vc->vc_mode != KD_TEXT || ops->graphics);
286}
287
288static inline int get_color(struct vc_data *vc, struct fb_info *info,
289 u16 c, int is_fg)
290{
b8c90945 291 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 292 int color = 0;
293
294 if (console_blanked) {
295 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
296
297 c = vc->vc_video_erase_char & charmask;
298 }
299
300 if (depth != 1)
301 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
302 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
303
304 switch (depth) {
305 case 1:
306 {
91c43132 307 int col = mono_col(info);
1da177e4 308 /* 0 or 1 */
b8c90945
AD		 309 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
310 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 311
312 if (console_blanked)
313 fg = bg;
314
315 color = (is_fg) ? fg : bg;
316 break;
317 }
318 case 2:
319 /*
320 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 321 * is grayscale. However, simply dividing the values by 4
322 * will not work, as colors 1, 2 and 3 will be scaled-down
323 * to zero rendering them invisible. So empirically convert
324 * colors to a sane 4-level grayscale.
1da177e4 325 */
2cc38ed1
AD		 326 switch (color) {
327 case 0:
328 color = 0; /* black */
329 break;
330 case 1 ... 6:
331 color = 2; /* white */
332 break;
333 case 7 ... 8:
334 color = 1; /* gray */
335 break;
336 default:
337 color = 3; /* intense white */
338 break;
339 }
340 break;
1da177e4
LT		 341 case 3:
342 /*
343 * Last 8 entries of default 16-color palette is a more intense
344 * version of the first 8 (i.e., same chrominance, different
345 * luminance).
346 */
347 color &= 7;
348 break;
349 }
350
351
352 return color;
353}
354
4d9c5b6e
AD		 355static void fbcon_update_softback(struct vc_data *vc)
356{
357 int l = fbcon_softback_size / vc->vc_size_row;
358
359 if (l > 5)
360 softback_end = softback_buf + l * vc->vc_size_row;
361 else
362 /* Smaller scrollback makes no sense, and 0 would screw
363 the operation totally */
364 softback_top = 0;
365}
366
c4028958 367static void fb_flashcursor(struct work_struct *work)
1da177e4 368{
c4028958 369 struct fb_info *info = container_of(work, struct fb_info, queue);
1da177e4
LT		 370 struct fbcon_ops *ops = info->fbcon_par;
371 struct display *p;
372 struct vc_data *vc = NULL;
373 int c;
374 int mode;
375
5428b044
AD		 376 acquire_console_sem();
377 if (ops && ops->currcon != -1)
1da177e4
LT		 378 vc = vc_cons[ops->currcon].d;
379
380 if (!vc || !CON_IS_VISIBLE(vc) ||
dbd4f128 381 registered_fb[con2fb_map[vc->vc_num]] != info ||
212f2639 382 vc->vc_deccm != 1) {
5428b044 383 release_console_sem();
1da177e4 384 return;
5428b044
AD		 385 }
386
1da177e4
LT		 387 p = &fb_display[vc->vc_num];
388 c = scr_readw((u16 *) vc->vc_pos);
389 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
390 CM_ERASE : CM_DRAW;
b73deed3 391 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4
LT		 392 get_color(vc, info, c, 0));
393 release_console_sem();
394}
395
1da177e4
LT		 396static void cursor_timer_handler(unsigned long dev_addr)
397{
398 struct fb_info *info = (struct fb_info *) dev_addr;
399 struct fbcon_ops *ops = info->fbcon_par;
400
401 schedule_work(&info->queue);
402 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
403}
404
88fb2c6e
AD		 405static void fbcon_add_cursor_timer(struct fb_info *info)
406{
407 struct fbcon_ops *ops = info->fbcon_par;
408
409 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
acba9cd0
AD		 410 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
411 !fbcon_cursor_noblink) {
88fb2c6e 412 if (!info->queue.func)
c4028958 413 INIT_WORK(&info->queue, fb_flashcursor);
88fb2c6e
AD		 414
415 init_timer(&ops->cursor_timer);
416 ops->cursor_timer.function = cursor_timer_handler;
417 ops->cursor_timer.expires = jiffies + HZ / 5;
418 ops->cursor_timer.data = (unsigned long ) info;
419 add_timer(&ops->cursor_timer);
420 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
421 }
422}
423
424static void fbcon_del_cursor_timer(struct fb_info *info)
425{
426 struct fbcon_ops *ops = info->fbcon_par;
427
428 if (info->queue.func == fb_flashcursor &&
429 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
430 del_timer_sync(&ops->cursor_timer);
431 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
432 }
433}
434
1da177e4
LT		 435#ifndef MODULE
436static int __init fb_console_setup(char *this_opt)
437{
438 char *options;
439 int i, j;
440
441 if (!this_opt || !*this_opt)
9b41046c 442 return 1;
1da177e4
LT		 443
444 while ((options = strsep(&this_opt, ",")) != NULL) {
445 if (!strncmp(options, "font:", 5))
446 strcpy(fontname, options + 5);
447
448 if (!strncmp(options, "scrollback:", 11)) {
449 options += 11;
450 if (*options) {
451 fbcon_softback_size = simple_strtoul(options, &options, 0);
452 if (*options == 'k' || *options == 'K') {
453 fbcon_softback_size *= 1024;
454 options++;
455 }
456 if (*options != ',')
9b41046c 457 return 1;
1da177e4
LT		 458 options++;
459 } else
9b41046c 460 return 1;
1da177e4
LT		 461 }
462
463 if (!strncmp(options, "map:", 4)) {
464 options += 4;
623e71b0 465 if (*options) {
1da177e4
LT		 466 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
467 if (!options[j])
468 j = 0;
469 con2fb_map_boot[i] =
470 (options[j++]-'0') % FB_MAX;
471 }
623e71b0 472
4769a9a5 473 fbcon_map_override();
623e71b0
AD		 474 }
475
9b41046c 476 return 1;
1da177e4
LT		 477 }
478
479 if (!strncmp(options, "vc:", 3)) {
480 options += 3;
481 if (*options)
482 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
483 if (first_fb_vc < 0)
484 first_fb_vc = 0;
485 if (*options++ == '-')
486 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
487 fbcon_is_default = 0;
488 }
e4fc2761
AD		 489
490 if (!strncmp(options, "rotate:", 7)) {
491 options += 7;
492 if (*options)
2428e59b
MS		 493 initial_rotation = simple_strtoul(options, &options, 0);
494 if (initial_rotation > 3)
495 initial_rotation = 0;
e4fc2761 496 }
1da177e4 497 }
9b41046c 498 return 1;
1da177e4
LT		 499}
500
501__setup("fbcon=", fb_console_setup);
502#endif
503
504static int search_fb_in_map(int idx)
505{
506 int i, retval = 0;
507
e614b18d 508 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 509 if (con2fb_map[i] == idx)
510 retval = 1;
511 }
512 return retval;
513}
514
515static int search_for_mapped_con(void)
516{
517 int i, retval = 0;
518
e614b18d 519 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 520 if (con2fb_map[i] != -1)
521 retval = 1;
522 }
523 return retval;
524}
525
526static int fbcon_takeover(int show_logo)
527{
528 int err, i;
529
530 if (!num_registered_fb)
531 return -ENODEV;
532
533 if (!show_logo)
534 logo_shown = FBCON_LOGO_DONTSHOW;
535
536 for (i = first_fb_vc; i <= last_fb_vc; i++)
537 con2fb_map[i] = info_idx;
538
539 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
540 fbcon_is_default);
e614b18d 541
1da177e4
LT		 542 if (err) {
543 for (i = first_fb_vc; i <= last_fb_vc; i++) {
544 con2fb_map[i] = -1;
545 }
546 info_idx = -1;
547 }
548
549 return err;
550}
551
70802c60
AD		 552#ifdef MODULE
553static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
554 int cols, int rows, int new_cols, int new_rows)
555{
556 logo_shown = FBCON_LOGO_DONTSHOW;
557}
558#else
1da177e4
LT		 559static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
560 int cols, int rows, int new_cols, int new_rows)
561{
562 /* Need to make room for the logo */
9c44e5f6 563 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 564 int cnt, erase = vc->vc_video_erase_char, step;
565 unsigned short *save = NULL, *r, *q;
49a1d28f 566 int logo_height;
1da177e4 567
70802c60
AD		 568 if (info->flags & FBINFO_MODULE) {
569 logo_shown = FBCON_LOGO_DONTSHOW;
570 return;
571 }
572
1da177e4
LT		 573 /*
574 * remove underline attribute from erase character
575 * if black and white framebuffer.
576 */
b8c90945 577 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 578 erase &= ~0x400;
9c44e5f6 579 logo_height = fb_prepare_logo(info, ops->rotate);
416e74ea 580 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
1da177e4
LT		 581 q = (unsigned short *) (vc->vc_origin +
582 vc->vc_size_row * rows);
583 step = logo_lines * cols;
584 for (r = q - logo_lines * cols; r < q; r++)
585 if (scr_readw(r) != vc->vc_video_erase_char)
586 break;
587 if (r != q && new_rows >= rows + logo_lines) {
588 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
589 if (save) {
590 int i = cols < new_cols ? cols : new_cols;
591 scr_memsetw(save, erase, logo_lines * new_cols * 2);
592 r = q - step;
593 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
594 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
595 r = q;
596 }
597 }
598 if (r == q) {
599 /* We can scroll screen down */
600 r = q - step - cols;
601 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
602 scr_memcpyw(r + step, r, vc->vc_size_row);
603 r -= cols;
604 }
605 if (!save) {
250038f5
GU		 606 int lines;
607 if (vc->vc_y + logo_lines >= rows)
608 lines = rows - vc->vc_y - 1;
609 else
610 lines = logo_lines;
611 vc->vc_y += lines;
612 vc->vc_pos += lines * vc->vc_size_row;
1da177e4
LT		 613 }
614 }
615 scr_memsetw((unsigned short *) vc->vc_origin,
616 erase,
617 vc->vc_size_row * logo_lines);
618
619 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
620 fbcon_clear_margins(vc, 0);
621 update_screen(vc);
622 }
623
624 if (save) {
625 q = (unsigned short *) (vc->vc_origin +
626 vc->vc_size_row *
627 rows);
628 scr_memcpyw(q, save, logo_lines * new_cols * 2);
629 vc->vc_y += logo_lines;
630 vc->vc_pos += logo_lines * vc->vc_size_row;
631 kfree(save);
632 }
633
634 if (logo_lines > vc->vc_bottom) {
635 logo_shown = FBCON_LOGO_CANSHOW;
636 printk(KERN_INFO
637 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
638 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
639 logo_shown = FBCON_LOGO_DRAW;
640 vc->vc_top = logo_lines;
641 }
642}
70802c60 643#endif /* MODULE */
1da177e4
LT		 644
645#ifdef CONFIG_FB_TILEBLITTING
b73deed3 646static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 647{
648 struct fbcon_ops *ops = info->fbcon_par;
649
b73deed3 650 ops->p = &fb_display[vc->vc_num];
ab767201 651
1da177e4 652 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 653 fbcon_set_tileops(vc, info);
e4fc2761 654 else {
b73deed3 655 fbcon_set_rotation(info);
1da177e4 656 fbcon_set_bitops(ops);
e4fc2761 657 }
1da177e4 658}
38b4982c
AD		 659
660static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
661{
662 int err = 0;
663
664 if (info->flags & FBINFO_MISC_TILEBLITTING &&
665 info->tileops->fb_get_tilemax(info) < charcount)
666 err = 1;
667
668 return err;
669}
1da177e4 670#else
b73deed3 671static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 672{
673 struct fbcon_ops *ops = info->fbcon_par;
674
675 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 676 ops->p = &fb_display[vc->vc_num];
677 fbcon_set_rotation(info);
1da177e4
LT		 678 fbcon_set_bitops(ops);
679}
38b4982c
AD		 680
681static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
682{
683 return 0;
684}
685
1da177e4
LT		 686#endif /* CONFIG_MISC_TILEBLITTING */
687
688
689static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
690 int unit, int oldidx)
691{
692 struct fbcon_ops *ops = NULL;
693 int err = 0;
694
695 if (!try_module_get(info->fbops->owner))
696 err = -ENODEV;
697
698 if (!err && info->fbops->fb_open &&
699 info->fbops->fb_open(info, 0))
700 err = -ENODEV;
701
702 if (!err) {
a39bc34e 703 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 704 if (!ops)
705 err = -ENOMEM;
706 }
707
708 if (!err) {
1da177e4 709 info->fbcon_par = ops;
d1baa4ff
AD		 710
711 if (vc)
712 set_blitting_type(vc, info);
1da177e4
LT		 713 }
714
715 if (err) {
716 con2fb_map[unit] = oldidx;
717 module_put(info->fbops->owner);
718 }
719
720 return err;
721}
722
723static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
724 struct fb_info *newinfo, int unit,
725 int oldidx, int found)
726{
727 struct fbcon_ops *ops = oldinfo->fbcon_par;
728 int err = 0;
729
730 if (oldinfo->fbops->fb_release &&
731 oldinfo->fbops->fb_release(oldinfo, 0)) {
732 con2fb_map[unit] = oldidx;
733 if (!found && newinfo->fbops->fb_release)
734 newinfo->fbops->fb_release(newinfo, 0);
735 if (!found)
736 module_put(newinfo->fbops->owner);
737 err = -ENODEV;
738 }
739
740 if (!err) {
88fb2c6e 741 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 742 kfree(ops->cursor_state.mask);
743 kfree(ops->cursor_data);
e4fc2761 744 kfree(ops->fontbuffer);
1da177e4
LT		 745 kfree(oldinfo->fbcon_par);
746 oldinfo->fbcon_par = NULL;
747 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 748 /*
749 If oldinfo and newinfo are driving the same hardware,
750 the fb_release() method of oldinfo may attempt to
751 restore the hardware state. This will leave the
752 newinfo in an undefined state. Thus, a call to
753 fb_set_par() may be needed for the newinfo.
754 */
755 if (newinfo->fbops->fb_set_par)
756 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 757 }
758
759 return err;
760}
761
1da177e4
LT		 762static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
763 int unit, int show_logo)
764{
765 struct fbcon_ops *ops = info->fbcon_par;
766
767 ops->currcon = fg_console;
768
769 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
770 info->fbops->fb_set_par(info);
771
772 ops->flags |= FBCON_FLAGS_INIT;
773 ops->graphics = 0;
d1baa4ff 774 fbcon_set_disp(info, &info->var, unit);
1da177e4
LT		 775
776 if (show_logo) {
777 struct vc_data *fg_vc = vc_cons[fg_console].d;
778 struct fb_info *fg_info =
779 registered_fb[con2fb_map[fg_console]];
780
781 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
782 fg_vc->vc_rows, fg_vc->vc_cols,
783 fg_vc->vc_rows);
784 }
785
786 update_screen(vc_cons[fg_console].d);
787}
788
789/**
790 * set_con2fb_map - map console to frame buffer device
791 * @unit: virtual console number to map
792 * @newidx: frame buffer index to map virtual console to
793 * @user: user request
794 *
795 * Maps a virtual console @unit to a frame buffer device
796 * @newidx.
797 */
798static int set_con2fb_map(int unit, int newidx, int user)
799{
800 struct vc_data *vc = vc_cons[unit].d;
801 int oldidx = con2fb_map[unit];
802 struct fb_info *info = registered_fb[newidx];
803 struct fb_info *oldinfo = NULL;
804 int found, err = 0;
805
806 if (oldidx == newidx)
807 return 0;
808
e614b18d
AD		 809 if (!info || fbcon_has_exited)
810 return -EINVAL;
1da177e4
LT		 811
812 if (!err && !search_for_mapped_con()) {
813 info_idx = newidx;
814 return fbcon_takeover(0);
815 }
816
817 if (oldidx != -1)
818 oldinfo = registered_fb[oldidx];
819
820 found = search_fb_in_map(newidx);
821
822 acquire_console_sem();
823 con2fb_map[unit] = newidx;
824 if (!err && !found)
825 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
826
827
828 /*
829 * If old fb is not mapped to any of the consoles,
830 * fbcon should release it.
831 */
832 if (!err && oldinfo && !search_fb_in_map(oldidx))
833 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
834 found);
835
836 if (!err) {
837 int show_logo = (fg_console == 0 && !user &&
838 logo_shown != FBCON_LOGO_DONTSHOW);
839
840 if (!found)
88fb2c6e 841 fbcon_add_cursor_timer(info);
1da177e4
LT		 842 con2fb_map_boot[unit] = newidx;
843 con2fb_init_display(vc, info, unit, show_logo);
844 }
845
e614b18d
AD		 846 if (!search_fb_in_map(info_idx))
847 info_idx = newidx;
848
1da177e4
LT		 849 release_console_sem();
850 return err;
851}
852
853/*
854 * Low Level Operations
855 */
856/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
857static int var_to_display(struct display *disp,
858 struct fb_var_screeninfo *var,
859 struct fb_info *info)
860{
861 disp->xres_virtual = var->xres_virtual;
862 disp->yres_virtual = var->yres_virtual;
863 disp->bits_per_pixel = var->bits_per_pixel;
864 disp->grayscale = var->grayscale;
865 disp->nonstd = var->nonstd;
866 disp->accel_flags = var->accel_flags;
867 disp->height = var->height;
868 disp->width = var->width;
869 disp->red = var->red;
870 disp->green = var->green;
871 disp->blue = var->blue;
872 disp->transp = var->transp;
873 disp->rotate = var->rotate;
874 disp->mode = fb_match_mode(var, &info->modelist);
875 if (disp->mode == NULL)
876 /* This should not happen */
877 return -EINVAL;
878 return 0;
879}
880
881static void display_to_var(struct fb_var_screeninfo *var,
882 struct display *disp)
883{
884 fb_videomode_to_var(var, disp->mode);
885 var->xres_virtual = disp->xres_virtual;
886 var->yres_virtual = disp->yres_virtual;
887 var->bits_per_pixel = disp->bits_per_pixel;
888 var->grayscale = disp->grayscale;
889 var->nonstd = disp->nonstd;
890 var->accel_flags = disp->accel_flags;
891 var->height = disp->height;
892 var->width = disp->width;
893 var->red = disp->red;
894 var->green = disp->green;
895 var->blue = disp->blue;
896 var->transp = disp->transp;
897 var->rotate = disp->rotate;
898}
899
900static const char *fbcon_startup(void)
901{
902 const char *display_desc = "frame buffer device";
903 struct display *p = &fb_display[fg_console];
904 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 905 const struct font_desc *font = NULL;
1da177e4
LT		 906 struct module *owner;
907 struct fb_info *info = NULL;
908 struct fbcon_ops *ops;
909 int rows, cols;
1da177e4 910
1da177e4
LT		 911 /*
912 * If num_registered_fb is zero, this is a call for the dummy part.
913 * The frame buffer devices weren't initialized yet.
914 */
915 if (!num_registered_fb || info_idx == -1)
916 return display_desc;
917 /*
918 * Instead of blindly using registered_fb[0], we use info_idx, set by
919 * fb_console_init();
920 */
921 info = registered_fb[info_idx];
922 if (!info)
923 return NULL;
924
925 owner = info->fbops->owner;
926 if (!try_module_get(owner))
927 return NULL;
928 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
929 module_put(owner);
930 return NULL;
931 }
932
a39bc34e 933 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 934 if (!ops) {
935 module_put(owner);
936 return NULL;
937 }
938
1da177e4
LT		 939 ops->currcon = -1;
940 ops->graphics = 1;
e4fc2761 941 ops->cur_rotate = -1;
1da177e4 942 info->fbcon_par = ops;
2428e59b 943 p->con_rotate = initial_rotation;
b73deed3 944 set_blitting_type(vc, info);
1da177e4
LT		 945
946 if (info->fix.type != FB_TYPE_TEXT) {
947 if (fbcon_softback_size) {
948 if (!softback_buf) {
949 softback_buf =
950 (unsigned long)
951 kmalloc(fbcon_softback_size,
952 GFP_KERNEL);
953 if (!softback_buf) {
954 fbcon_softback_size = 0;
955 softback_top = 0;
956 }
957 }
958 } else {
959 if (softback_buf) {
960 kfree((void *) softback_buf);
961 softback_buf = 0;
962 softback_top = 0;
963 }
964 }
965 if (softback_buf)
966 softback_in = softback_top = softback_curr =
967 softback_buf;
968 softback_lines = 0;
969 }
970
971 /* Setup default font */
972 if (!p->fontdata) {
973 if (!fontname[0] || !(font = find_font(fontname)))
974 font = get_default_font(info->var.xres,
2d2699d9
AD		 975 info->var.yres,
976 info->pixmap.blit_x,
977 info->pixmap.blit_y);
1da177e4
LT		 978 vc->vc_font.width = font->width;
979 vc->vc_font.height = font->height;
2f4516db 980 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 981 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
982 }
983
e4fc2761
AD		 984 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
985 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
986 cols /= vc->vc_font.width;
987 rows /= vc->vc_font.height;
1da177e4
LT		 988 vc_resize(vc, cols, rows);
989
990 DPRINTK("mode: %s\n", info->fix.id);
991 DPRINTK("visual: %d\n", info->fix.visual);
992 DPRINTK("res: %dx%d-%d\n", info->var.xres,
993 info->var.yres,
994 info->var.bits_per_pixel);
995
88fb2c6e 996 fbcon_add_cursor_timer(info);
e614b18d 997 fbcon_has_exited = 0;
1da177e4
LT		 998 return display_desc;
999}
1000
1001static void fbcon_init(struct vc_data *vc, int init)
1002{
1003 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1004 struct fbcon_ops *ops;
1005 struct vc_data **default_mode = vc->vc_display_fg;
1006 struct vc_data *svc = *default_mode;
1007 struct display *t, *p = &fb_display[vc->vc_num];
1008 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 1009 int cap;
1da177e4
LT		 1010
1011 if (info_idx == -1 || info == NULL)
1012 return;
306958e8
AB		 1013
1014 cap = info->flags;
1015
1da177e4
LT		 1016 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1017 (info->fix.type == FB_TYPE_TEXT))
1018 logo = 0;
1019
1da177e4
LT		 1020 if (var_to_display(p, &info->var, info))
1021 return;
1022
d1baa4ff
AD		 1023 if (!info->fbcon_par)
1024 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1025
1da177e4
LT		 1026 /* If we are not the first console on this
1027 fb, copy the font from that console */
e614b18d
AD		 1028 t = &fb_display[fg_console];
1029 if (!p->fontdata) {
1030 if (t->fontdata) {
1031 struct vc_data *fvc = vc_cons[fg_console].d;
1032
1033 vc->vc_font.data = (void *)(p->fontdata =
1034 fvc->vc_font.data);
1035 vc->vc_font.width = fvc->vc_font.width;
1036 vc->vc_font.height = fvc->vc_font.height;
1037 p->userfont = t->userfont;
1038
1039 if (p->userfont)
1040 REFCOUNT(p->fontdata)++;
1041 } else {
1042 const struct font_desc *font = NULL;
1043
1044 if (!fontname[0] || !(font = find_font(fontname)))
1045 font = get_default_font(info->var.xres,
2d2699d9
AD		 1046 info->var.yres,
1047 info->pixmap.blit_x,
1048 info->pixmap.blit_y);
e614b18d
AD		 1049 vc->vc_font.width = font->width;
1050 vc->vc_font.height = font->height;
1051 vc->vc_font.data = (void *)(p->fontdata = font->data);
1052 vc->vc_font.charcount = 256; /* FIXME Need to
1053 support more fonts */
1054 }
1da177e4 1055 }
e614b18d 1056
1da177e4
LT		 1057 if (p->userfont)
1058 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1059
b8c90945 1060 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1061 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1062 if (charcnt == 256) {
1063 vc->vc_hi_font_mask = 0;
1064 } else {
1065 vc->vc_hi_font_mask = 0x100;
1066 if (vc->vc_can_do_color)
1067 vc->vc_complement_mask <<= 1;
1068 }
1069
1070 if (!*svc->vc_uni_pagedir_loc)
1071 con_set_default_unimap(svc);
1072 if (!*vc->vc_uni_pagedir_loc)
1073 con_copy_unimap(vc, svc);
1074
e4fc2761 1075 ops = info->fbcon_par;
2428e59b 1076 p->con_rotate = initial_rotation;
b73deed3 1077 set_blitting_type(vc, info);
e4fc2761 1078
1da177e4
LT		 1079 cols = vc->vc_cols;
1080 rows = vc->vc_rows;
e4fc2761
AD		 1081 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1082 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1083 new_cols /= vc->vc_font.width;
1084 new_rows /= vc->vc_font.height;
1da177e4 1085
1da177e4
LT		 1086 /*
1087 * We must always set the mode. The mode of the previous console
1088 * driver could be in the same resolution but we are using different
1089 * hardware so we have to initialize the hardware.
1090 *
1091 * We need to do it in fbcon_init() to prevent screen corruption.
1092 */
d354d9af 1093 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4
LT		 1094 if (info->fbops->fb_set_par &&
1095 !(ops->flags & FBCON_FLAGS_INIT))
1096 info->fbops->fb_set_par(info);
1097 ops->flags |= FBCON_FLAGS_INIT;
1098 }
1099
1100 ops->graphics = 0;
1101
1102 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1103 !(cap & FBINFO_HWACCEL_DISABLED))
1104 p->scrollmode = SCROLL_MOVE;
1105 else /* default to something safe */
1106 p->scrollmode = SCROLL_REDRAW;
1107
1108 /*
1109 * ++guenther: console.c:vc_allocate() relies on initializing
1110 * vc_{cols,rows}, but we must not set those if we are only
1111 * resizing the console.
1112 */
0035fe00 1113 if (init) {
1da177e4
LT		 1114 vc->vc_cols = new_cols;
1115 vc->vc_rows = new_rows;
0035fe00
JW		 1116 } else
1117 vc_resize(vc, new_cols, new_rows);
1da177e4
LT		 1118
1119 if (logo)
1120 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1121
4d9c5b6e
AD		 1122 if (vc == svc && softback_buf)
1123 fbcon_update_softback(vc);
e4fc2761 1124
b73deed3 1125 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1126 ops->rotate = FB_ROTATE_UR;
b73deed3 1127 set_blitting_type(vc, info);
e4fc2761
AD		 1128 }
1129
1a37d5f5 1130 ops->p = &fb_display[fg_console];
1da177e4
LT		 1131}
1132
e614b18d
AD		 1133static void fbcon_free_font(struct display *p)
1134{
1135 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1136 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1137 p->fontdata = NULL;
1138 p->userfont = 0;
1139}
1140
1da177e4
LT		 1141static void fbcon_deinit(struct vc_data *vc)
1142{
1143 struct display *p = &fb_display[vc->vc_num];
e614b18d
AD		 1144 struct fb_info *info;
1145 struct fbcon_ops *ops;
1146 int idx;
1da177e4 1147
1da177e4 1148 fbcon_free_font(p);
e614b18d
AD		 1149 idx = con2fb_map[vc->vc_num];
1150
1151 if (idx == -1)
1152 goto finished;
1153
1154 info = registered_fb[idx];
1155
1156 if (!info)
1157 goto finished;
1158
1159 ops = info->fbcon_par;
1160
1161 if (!ops)
1162 goto finished;
1163
1164 if (CON_IS_VISIBLE(vc))
1165 fbcon_del_cursor_timer(info);
1166
1167 ops->flags &= ~FBCON_FLAGS_INIT;
1168finished:
1169
1170 if (!con_is_bound(&fb_con))
1171 fbcon_exit();
1172
1173 return;
1da177e4
LT		 1174}
1175
1176/* ====================================================================== */
1177
1178/* fbcon_XXX routines - interface used by the world
1179 *
1180 * This system is now divided into two levels because of complications
1181 * caused by hardware scrolling. Top level functions:
1182 *
1183 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1184 *
1185 * handles y values in range [0, scr_height-1] that correspond to real
1186 * screen positions. y_wrap shift means that first line of bitmap may be
1187 * anywhere on this display. These functions convert lineoffsets to
1188 * bitmap offsets and deal with the wrap-around case by splitting blits.
1189 *
1190 * fbcon_bmove_physical_8() -- These functions fast implementations
1191 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1192 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1193 *
1194 * WARNING:
1195 *
1196 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1197 * Implies should only really hardware scroll in rows. Only reason for
1198 * restriction is simplicity & efficiency at the moment.
1199 */
1200
1da177e4
LT		 1201static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1202 int width)
1203{
1204 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1205 struct fbcon_ops *ops = info->fbcon_par;
1206
1207 struct display *p = &fb_display[vc->vc_num];
1208 u_int y_break;
1209
1210 if (fbcon_is_inactive(vc, info))
1211 return;
1212
1213 if (!height || !width)
1214 return;
1215
c213ddf3
KH		 1216 if (sy < vc->vc_top && vc->vc_top == logo_lines)
1217 vc->vc_top = 0;
1218
1da177e4
LT		 1219 /* Split blits that cross physical y_wrap boundary */
1220
1221 y_break = p->vrows - p->yscroll;
1222 if (sy < y_break && sy + height - 1 >= y_break) {
1223 u_int b = y_break - sy;
1224 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1225 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1226 width);
1227 } else
1228 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1229}
1230
1231static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1232 int count, int ypos, int xpos)
1233{
1234 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1235 struct display *p = &fb_display[vc->vc_num];
1236 struct fbcon_ops *ops = info->fbcon_par;
1237
1238 if (!fbcon_is_inactive(vc, info))
1239 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1240 get_color(vc, info, scr_readw(s), 1),
1241 get_color(vc, info, scr_readw(s), 0));
1242}
1243
1244static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1245{
1246 unsigned short chr;
1247
1248 scr_writew(c, &chr);
1249 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1250}
1251
1252static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1253{
1254 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1255 struct fbcon_ops *ops = info->fbcon_par;
1256
1257 if (!fbcon_is_inactive(vc, info))
1258 ops->clear_margins(vc, info, bottom_only);
1259}
1260
1261static void fbcon_cursor(struct vc_data *vc, int mode)
1262{
1263 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1264 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1265 int y;
1266 int c = scr_readw((u16 *) vc->vc_pos);
1267
d1e23066 1268 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1da177e4
LT		 1269 return;
1270
acba9cd0
AD		 1271 if (vc->vc_cursor_type & 0x10)
1272 fbcon_del_cursor_timer(info);
1273 else
1274 fbcon_add_cursor_timer(info);
1275
1da177e4
LT		 1276 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1277 if (mode & CM_SOFTBACK) {
1278 mode &= ~CM_SOFTBACK;
1279 y = softback_lines;
1280 } else {
1281 if (softback_lines)
1282 fbcon_set_origin(vc);
1283 y = 0;
1284 }
1285
b73deed3 1286 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4
LT		 1287 get_color(vc, info, c, 0));
1288 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1289}
1290
1291static int scrollback_phys_max = 0;
1292static int scrollback_max = 0;
1293static int scrollback_current = 0;
1294
1da177e4 1295static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 1296 int unit)
1da177e4 1297{
d1baa4ff
AD		 1298 struct display *p, *t;
1299 struct vc_data **default_mode, *vc;
1300 struct vc_data *svc;
e4fc2761 1301 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1302 int rows, cols, charcnt = 256;
1303
d1baa4ff
AD		 1304 p = &fb_display[unit];
1305
1da177e4
LT		 1306 if (var_to_display(p, var, info))
1307 return;
d1baa4ff
AD		 1308
1309 vc = vc_cons[unit].d;
1310
1311 if (!vc)
1312 return;
1313
1314 default_mode = vc->vc_display_fg;
1315 svc = *default_mode;
1da177e4 1316 t = &fb_display[svc->vc_num];
d1baa4ff 1317
1da177e4 1318 if (!vc->vc_font.data) {
2f4516db 1319 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1320 vc->vc_font.width = (*default_mode)->vc_font.width;
1321 vc->vc_font.height = (*default_mode)->vc_font.height;
1322 p->userfont = t->userfont;
1323 if (p->userfont)
1324 REFCOUNT(p->fontdata)++;
1325 }
1326 if (p->userfont)
1327 charcnt = FNTCHARCNT(p->fontdata);
1328
b8c90945
AD		 1329 var->activate = FB_ACTIVATE_NOW;
1330 info->var.activate = var->activate;
e4fc2761
AD		 1331 var->yoffset = info->var.yoffset;
1332 var->xoffset = info->var.xoffset;
b8c90945 1333 fb_set_var(info, var);
e4fc2761 1334 ops->var = info->var;
b8c90945 1335 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1336 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1337 if (charcnt == 256) {
1338 vc->vc_hi_font_mask = 0;
1339 } else {
1340 vc->vc_hi_font_mask = 0x100;
1341 if (vc->vc_can_do_color)
1342 vc->vc_complement_mask <<= 1;
1343 }
1344
1345 if (!*svc->vc_uni_pagedir_loc)
1346 con_set_default_unimap(svc);
1347 if (!*vc->vc_uni_pagedir_loc)
1348 con_copy_unimap(vc, svc);
1349
e4fc2761
AD		 1350 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1351 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1352 cols /= vc->vc_font.width;
1353 rows /= vc->vc_font.height;
1da177e4 1354 vc_resize(vc, cols, rows);
e4fc2761 1355
1da177e4
LT		 1356 if (CON_IS_VISIBLE(vc)) {
1357 update_screen(vc);
4d9c5b6e
AD		 1358 if (softback_buf)
1359 fbcon_update_softback(vc);
1da177e4
LT		 1360 }
1361}
1362
1363static __inline__ void ywrap_up(struct vc_data *vc, int count)
1364{
1365 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1366 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1367 struct display *p = &fb_display[vc->vc_num];
1368
1369 p->yscroll += count;
1370 if (p->yscroll >= p->vrows) /* Deal with wrap */
1371 p->yscroll -= p->vrows;
e4fc2761
AD		 1372 ops->var.xoffset = 0;
1373 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1374 ops->var.vmode |= FB_VMODE_YWRAP;
1375 ops->update_start(info);
1da177e4
LT		 1376 scrollback_max += count;
1377 if (scrollback_max > scrollback_phys_max)
1378 scrollback_max = scrollback_phys_max;
1379 scrollback_current = 0;
1380}
1381
1382static __inline__ void ywrap_down(struct vc_data *vc, int count)
1383{
1384 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1385 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1386 struct display *p = &fb_display[vc->vc_num];
1387
1388 p->yscroll -= count;
1389 if (p->yscroll < 0) /* Deal with wrap */
1390 p->yscroll += p->vrows;
e4fc2761
AD		 1391 ops->var.xoffset = 0;
1392 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1393 ops->var.vmode |= FB_VMODE_YWRAP;
1394 ops->update_start(info);
1da177e4
LT		 1395 scrollback_max -= count;
1396 if (scrollback_max < 0)
1397 scrollback_max = 0;
1398 scrollback_current = 0;
1399}
1400
1401static __inline__ void ypan_up(struct vc_data *vc, int count)
1402{
1403 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1404 struct display *p = &fb_display[vc->vc_num];
1405 struct fbcon_ops *ops = info->fbcon_par;
1406
1407 p->yscroll += count;
1408 if (p->yscroll > p->vrows - vc->vc_rows) {
1409 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1410 0, 0, 0, vc->vc_rows, vc->vc_cols);
1411 p->yscroll -= p->vrows - vc->vc_rows;
1412 }
e4fc2761
AD		 1413
1414 ops->var.xoffset = 0;
1415 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416 ops->var.vmode &= ~FB_VMODE_YWRAP;
1417 ops->update_start(info);
1da177e4
LT		 1418 fbcon_clear_margins(vc, 1);
1419 scrollback_max += count;
1420 if (scrollback_max > scrollback_phys_max)
1421 scrollback_max = scrollback_phys_max;
1422 scrollback_current = 0;
1423}
1424
1425static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1426{
1427 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1428 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1429 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1430
1431 p->yscroll += count;
a39bc34e 1432
1da177e4
LT		 1433 if (p->yscroll > p->vrows - vc->vc_rows) {
1434 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1435 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1436 }
e4fc2761
AD		 1437
1438 ops->var.xoffset = 0;
1439 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1440 ops->var.vmode &= ~FB_VMODE_YWRAP;
1441 ops->update_start(info);
1da177e4
LT		 1442 fbcon_clear_margins(vc, 1);
1443 scrollback_max += count;
1444 if (scrollback_max > scrollback_phys_max)
1445 scrollback_max = scrollback_phys_max;
1446 scrollback_current = 0;
1447}
1448
1449static __inline__ void ypan_down(struct vc_data *vc, int count)
1450{
1451 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1452 struct display *p = &fb_display[vc->vc_num];
1453 struct fbcon_ops *ops = info->fbcon_par;
1454
1455 p->yscroll -= count;
1456 if (p->yscroll < 0) {
1457 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1458 0, vc->vc_rows, vc->vc_cols);
1459 p->yscroll += p->vrows - vc->vc_rows;
1460 }
e4fc2761
AD		 1461
1462 ops->var.xoffset = 0;
1463 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1464 ops->var.vmode &= ~FB_VMODE_YWRAP;
1465 ops->update_start(info);
1da177e4
LT		 1466 fbcon_clear_margins(vc, 1);
1467 scrollback_max -= count;
1468 if (scrollback_max < 0)
1469 scrollback_max = 0;
1470 scrollback_current = 0;
1471}
1472
1473static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1474{
1475 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1476 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1477 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1478
1479 p->yscroll -= count;
a39bc34e 1480
1da177e4
LT		 1481 if (p->yscroll < 0) {
1482 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1483 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1484 }
e4fc2761
AD		 1485
1486 ops->var.xoffset = 0;
1487 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1488 ops->var.vmode &= ~FB_VMODE_YWRAP;
1489 ops->update_start(info);
1da177e4
LT		 1490 fbcon_clear_margins(vc, 1);
1491 scrollback_max -= count;
1492 if (scrollback_max < 0)
1493 scrollback_max = 0;
1494 scrollback_current = 0;
1495}
1496
1497static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1498 long delta)
1499{
1500 int count = vc->vc_rows;
1501 unsigned short *d, *s;
1502 unsigned long n;
1503 int line = 0;
1504
1505 d = (u16 *) softback_curr;
1506 if (d == (u16 *) softback_in)
1507 d = (u16 *) vc->vc_origin;
1508 n = softback_curr + delta * vc->vc_size_row;
1509 softback_lines -= delta;
1510 if (delta < 0) {
1511 if (softback_curr < softback_top && n < softback_buf) {
1512 n += softback_end - softback_buf;
1513 if (n < softback_top) {
1514 softback_lines -=
1515 (softback_top - n) / vc->vc_size_row;
1516 n = softback_top;
1517 }
1518 } else if (softback_curr >= softback_top
1519 && n < softback_top) {
1520 softback_lines -=
1521 (softback_top - n) / vc->vc_size_row;
1522 n = softback_top;
1523 }
1524 } else {
1525 if (softback_curr > softback_in && n >= softback_end) {
1526 n += softback_buf - softback_end;
1527 if (n > softback_in) {
1528 n = softback_in;
1529 softback_lines = 0;
1530 }
1531 } else if (softback_curr <= softback_in && n > softback_in) {
1532 n = softback_in;
1533 softback_lines = 0;
1534 }
1535 }
1536 if (n == softback_curr)
1537 return;
1538 softback_curr = n;
1539 s = (u16 *) softback_curr;
1540 if (s == (u16 *) softback_in)
1541 s = (u16 *) vc->vc_origin;
1542 while (count--) {
1543 unsigned short *start;
1544 unsigned short *le;
1545 unsigned short c;
1546 int x = 0;
1547 unsigned short attr = 1;
1548
1549 start = s;
1550 le = advance_row(s, 1);
1551 do {
1552 c = scr_readw(s);
1553 if (attr != (c & 0xff00)) {
1554 attr = c & 0xff00;
1555 if (s > start) {
1556 fbcon_putcs(vc, start, s - start,
1557 line, x);
1558 x += s - start;
1559 start = s;
1560 }
1561 }
1562 if (c == scr_readw(d)) {
1563 if (s > start) {
1564 fbcon_putcs(vc, start, s - start,
1565 line, x);
1566 x += s - start + 1;
1567 start = s + 1;
1568 } else {
1569 x++;
1570 start++;
1571 }
1572 }
1573 s++;
1574 d++;
1575 } while (s < le);
1576 if (s > start)
1577 fbcon_putcs(vc, start, s - start, line, x);
1578 line++;
1579 if (d == (u16 *) softback_end)
1580 d = (u16 *) softback_buf;
1581 if (d == (u16 *) softback_in)
1582 d = (u16 *) vc->vc_origin;
1583 if (s == (u16 *) softback_end)
1584 s = (u16 *) softback_buf;
1585 if (s == (u16 *) softback_in)
1586 s = (u16 *) vc->vc_origin;
1587 }
1588}
1589
1590static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1591 int line, int count, int dy)
1592{
1593 unsigned short *s = (unsigned short *)
1594 (vc->vc_origin + vc->vc_size_row * line);
1595
1596 while (count--) {
1597 unsigned short *start = s;
1598 unsigned short *le = advance_row(s, 1);
1599 unsigned short c;
1600 int x = 0;
1601 unsigned short attr = 1;
1602
1603 do {
1604 c = scr_readw(s);
1605 if (attr != (c & 0xff00)) {
1606 attr = c & 0xff00;
1607 if (s > start) {
1608 fbcon_putcs(vc, start, s - start,
1609 dy, x);
1610 x += s - start;
1611 start = s;
1612 }
1613 }
1614 console_conditional_schedule();
1615 s++;
1616 } while (s < le);
1617 if (s > start)
1618 fbcon_putcs(vc, start, s - start, dy, x);
1619 console_conditional_schedule();
1620 dy++;
1621 }
1622}
1623
bad07ff7
KH		 1624static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1625 struct display *p, int line, int count, int ycount)
1626{
1627 int offset = ycount * vc->vc_cols;
1628 unsigned short *d = (unsigned short *)
1629 (vc->vc_origin + vc->vc_size_row * line);
1630 unsigned short *s = d + offset;
1631 struct fbcon_ops *ops = info->fbcon_par;
1632
1633 while (count--) {
1634 unsigned short *start = s;
1635 unsigned short *le = advance_row(s, 1);
1636 unsigned short c;
1637 int x = 0;
1638
1639 do {
1640 c = scr_readw(s);
1641
1642 if (c == scr_readw(d)) {
1643 if (s > start) {
1644 ops->bmove(vc, info, line + ycount, x,
1645 line, x, 1, s-start);
1646 x += s - start + 1;
1647 start = s + 1;
1648 } else {
1649 x++;
1650 start++;
1651 }
1652 }
1653
1654 scr_writew(c, d);
1655 console_conditional_schedule();
1656 s++;
1657 d++;
1658 } while (s < le);
1659 if (s > start)
1660 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1661 s-start);
1662 console_conditional_schedule();
1663 if (ycount > 0)
1664 line++;
1665 else {
1666 line--;
1667 /* NOTE: We subtract two lines from these pointers */
1668 s -= vc->vc_size_row;
1669 d -= vc->vc_size_row;
1670 }
1671 }
1672}
1673
1da177e4
LT		 1674static void fbcon_redraw(struct vc_data *vc, struct display *p,
1675 int line, int count, int offset)
1676{
1677 unsigned short *d = (unsigned short *)
1678 (vc->vc_origin + vc->vc_size_row * line);
1679 unsigned short *s = d + offset;
1680
1681 while (count--) {
1682 unsigned short *start = s;
1683 unsigned short *le = advance_row(s, 1);
1684 unsigned short c;
1685 int x = 0;
1686 unsigned short attr = 1;
1687
1688 do {
1689 c = scr_readw(s);
1690 if (attr != (c & 0xff00)) {
1691 attr = c & 0xff00;
1692 if (s > start) {
1693 fbcon_putcs(vc, start, s - start,
1694 line, x);
1695 x += s - start;
1696 start = s;
1697 }
1698 }
1699 if (c == scr_readw(d)) {
1700 if (s > start) {
1701 fbcon_putcs(vc, start, s - start,
1702 line, x);
1703 x += s - start + 1;
1704 start = s + 1;
1705 } else {
1706 x++;
1707 start++;
1708 }
1709 }
1710 scr_writew(c, d);
1711 console_conditional_schedule();
1712 s++;
1713 d++;
1714 } while (s < le);
1715 if (s > start)
1716 fbcon_putcs(vc, start, s - start, line, x);
1717 console_conditional_schedule();
1718 if (offset > 0)
1719 line++;
1720 else {
1721 line--;
1722 /* NOTE: We subtract two lines from these pointers */
1723 s -= vc->vc_size_row;
1724 d -= vc->vc_size_row;
1725 }
1726 }
1727}
1728
1729static inline void fbcon_softback_note(struct vc_data *vc, int t,
1730 int count)
1731{
1732 unsigned short *p;
1733
1734 if (vc->vc_num != fg_console)
1735 return;
1736 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1737
1738 while (count) {
1739 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1740 count--;
1741 p = advance_row(p, 1);
1742 softback_in += vc->vc_size_row;
1743 if (softback_in == softback_end)
1744 softback_in = softback_buf;
1745 if (softback_in == softback_top) {
1746 softback_top += vc->vc_size_row;
1747 if (softback_top == softback_end)
1748 softback_top = softback_buf;
1749 }
1750 }
1751 softback_curr = softback_in;
1752}
1753
1754static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1755 int count)
1756{
1757 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1758 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1759 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1760
1761 if (fbcon_is_inactive(vc, info))
1762 return -EINVAL;
1763
1764 fbcon_cursor(vc, CM_ERASE);
1765
1766 /*
1767 * ++Geert: Only use ywrap/ypan if the console is in text mode
1768 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1769 * whole screen (prevents flicker).
1770 */
1771
1772 switch (dir) {
1773 case SM_UP:
1774 if (count > vc->vc_rows) /* Maximum realistic size */
1775 count = vc->vc_rows;
1776 if (softback_top)
1777 fbcon_softback_note(vc, t, count);
1778 if (logo_shown >= 0)
1779 goto redraw_up;
1780 switch (p->scrollmode) {
1781 case SCROLL_MOVE:
bad07ff7
KH		 1782 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1783 count);
1784 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1785 scr_memsetw((unsigned short *) (vc->vc_origin +
1786 vc->vc_size_row *
1787 (b - count)),
93f78da4 1788 vc->vc_video_erase_char,
bad07ff7 1789 vc->vc_size_row * count);
93f78da4 1790 return 1;
1da177e4
LT		 1791 break;
1792
1793 case SCROLL_WRAP_MOVE:
1794 if (b - t - count > 3 * vc->vc_rows >> 2) {
1795 if (t > 0)
1796 fbcon_bmove(vc, 0, 0, count, 0, t,
1797 vc->vc_cols);
1798 ywrap_up(vc, count);
1799 if (vc->vc_rows - b > 0)
1800 fbcon_bmove(vc, b - count, 0, b, 0,
1801 vc->vc_rows - b,
1802 vc->vc_cols);
1803 } else if (info->flags & FBINFO_READS_FAST)
1804 fbcon_bmove(vc, t + count, 0, t, 0,
1805 b - t - count, vc->vc_cols);
1806 else
1807 goto redraw_up;
1808 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1809 break;
1810
1811 case SCROLL_PAN_REDRAW:
1812 if ((p->yscroll + count <=
1813 2 * (p->vrows - vc->vc_rows))
1814 && ((!scroll_partial && (b - t == vc->vc_rows))
1815 || (scroll_partial
1816 && (b - t - count >
1817 3 * vc->vc_rows >> 2)))) {
1818 if (t > 0)
1819 fbcon_redraw_move(vc, p, 0, t, count);
1820 ypan_up_redraw(vc, t, count);
1821 if (vc->vc_rows - b > 0)
26e780e8 1822 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1823 vc->vc_rows - b, b);
1824 } else
1825 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1826 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1827 break;
1828
1829 case SCROLL_PAN_MOVE:
1830 if ((p->yscroll + count <=
1831 2 * (p->vrows - vc->vc_rows))
1832 && ((!scroll_partial && (b - t == vc->vc_rows))
1833 || (scroll_partial
1834 && (b - t - count >
1835 3 * vc->vc_rows >> 2)))) {
1836 if (t > 0)
1837 fbcon_bmove(vc, 0, 0, count, 0, t,
1838 vc->vc_cols);
1839 ypan_up(vc, count);
1840 if (vc->vc_rows - b > 0)
1841 fbcon_bmove(vc, b - count, 0, b, 0,
1842 vc->vc_rows - b,
1843 vc->vc_cols);
1844 } else if (info->flags & FBINFO_READS_FAST)
1845 fbcon_bmove(vc, t + count, 0, t, 0,
1846 b - t - count, vc->vc_cols);
1847 else
1848 goto redraw_up;
1849 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1850 break;
1851
1852 case SCROLL_REDRAW:
1853 redraw_up:
1854 fbcon_redraw(vc, p, t, b - t - count,
1855 count * vc->vc_cols);
1856 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1857 scr_memsetw((unsigned short *) (vc->vc_origin +
1858 vc->vc_size_row *
1859 (b - count)),
93f78da4 1860 vc->vc_video_erase_char,
1da177e4 1861 vc->vc_size_row * count);
93f78da4 1862 return 1;
1da177e4
LT		 1863 }
1864 break;
1865
1866 case SM_DOWN:
1867 if (count > vc->vc_rows) /* Maximum realistic size */
1868 count = vc->vc_rows;
e703ecc3
JB		 1869 if (logo_shown >= 0)
1870 goto redraw_down;
1da177e4
LT		 1871 switch (p->scrollmode) {
1872 case SCROLL_MOVE:
bad07ff7
KH		 1873 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1874 -count);
1875 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1876 scr_memsetw((unsigned short *) (vc->vc_origin +
1877 vc->vc_size_row *
1878 t),
93f78da4 1879 vc->vc_video_erase_char,
bad07ff7 1880 vc->vc_size_row * count);
93f78da4 1881 return 1;
1da177e4
LT		 1882 break;
1883
1884 case SCROLL_WRAP_MOVE:
1885 if (b - t - count > 3 * vc->vc_rows >> 2) {
1886 if (vc->vc_rows - b > 0)
1887 fbcon_bmove(vc, b, 0, b - count, 0,
1888 vc->vc_rows - b,
1889 vc->vc_cols);
1890 ywrap_down(vc, count);
1891 if (t > 0)
1892 fbcon_bmove(vc, count, 0, 0, 0, t,
1893 vc->vc_cols);
1894 } else if (info->flags & FBINFO_READS_FAST)
1895 fbcon_bmove(vc, t, 0, t + count, 0,
1896 b - t - count, vc->vc_cols);
1897 else
1898 goto redraw_down;
1899 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1900 break;
1901
1902 case SCROLL_PAN_MOVE:
1903 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1904 && ((!scroll_partial && (b - t == vc->vc_rows))
1905 || (scroll_partial
1906 && (b - t - count >
1907 3 * vc->vc_rows >> 2)))) {
1908 if (vc->vc_rows - b > 0)
1909 fbcon_bmove(vc, b, 0, b - count, 0,
1910 vc->vc_rows - b,
1911 vc->vc_cols);
1912 ypan_down(vc, count);
1913 if (t > 0)
1914 fbcon_bmove(vc, count, 0, 0, 0, t,
1915 vc->vc_cols);
1916 } else if (info->flags & FBINFO_READS_FAST)
1917 fbcon_bmove(vc, t, 0, t + count, 0,
1918 b - t - count, vc->vc_cols);
1919 else
1920 goto redraw_down;
1921 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1922 break;
1923
1924 case SCROLL_PAN_REDRAW:
1925 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1926 && ((!scroll_partial && (b - t == vc->vc_rows))
1927 || (scroll_partial
1928 && (b - t - count >
1929 3 * vc->vc_rows >> 2)))) {
1930 if (vc->vc_rows - b > 0)
1931 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1932 b - count);
1933 ypan_down_redraw(vc, t, count);
1934 if (t > 0)
1935 fbcon_redraw_move(vc, p, count, t, 0);
1936 } else
1937 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1938 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1939 break;
1940
1941 case SCROLL_REDRAW:
1942 redraw_down:
1943 fbcon_redraw(vc, p, b - 1, b - t - count,
1944 -count * vc->vc_cols);
1945 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1946 scr_memsetw((unsigned short *) (vc->vc_origin +
1947 vc->vc_size_row *
1948 t),
93f78da4 1949 vc->vc_video_erase_char,
1da177e4 1950 vc->vc_size_row * count);
93f78da4 1951 return 1;
1da177e4
LT		 1952 }
1953 }
93f78da4 1954 return 0;
1da177e4
LT		 1955}
1956
1957
1958static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1959 int height, int width)
1960{
1961 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1962 struct display *p = &fb_display[vc->vc_num];
1963
1964 if (fbcon_is_inactive(vc, info))
1965 return;
1966
1967 if (!width || !height)
1968 return;
1969
1970 /* Split blits that cross physical y_wrap case.
1971 * Pathological case involves 4 blits, better to use recursive
1972 * code rather than unrolled case
1973 *
1974 * Recursive invocations don't need to erase the cursor over and
1975 * over again, so we use fbcon_bmove_rec()
1976 */
1977 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1978 p->vrows - p->yscroll);
1979}
1980
1981static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1982 int dy, int dx, int height, int width, u_int y_break)
1983{
1984 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1985 struct fbcon_ops *ops = info->fbcon_par;
1986 u_int b;
1987
1988 if (sy < y_break && sy + height > y_break) {
1989 b = y_break - sy;
1990 if (dy < sy) { /* Avoid trashing self */
1991 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1992 y_break);
1993 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1994 height - b, width, y_break);
1995 } else {
1996 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1997 height - b, width, y_break);
1998 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1999 y_break);
2000 }
2001 return;
2002 }
2003
2004 if (dy < y_break && dy + height > y_break) {
2005 b = y_break - dy;
2006 if (dy < sy) { /* Avoid trashing self */
2007 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2008 y_break);
2009 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2010 height - b, width, y_break);
2011 } else {
2012 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2013 height - b, width, y_break);
2014 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2015 y_break);
2016 }
2017 return;
2018 }
2019 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2020 height, width);
2021}
2022
def1be2d 2023static void updatescrollmode(struct display *p,
e4fc2761 2024 struct fb_info *info,
1da177e4
LT		 2025 struct vc_data *vc)
2026{
e4fc2761 2027 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2028 int fh = vc->vc_font.height;
2029 int cap = info->flags;
e4fc2761
AD		 2030 u16 t = 0;
2031 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2032 info->fix.xpanstep);
2033 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2034 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2035 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2036 info->var.xres_virtual);
2037 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2038 divides(ypan, vc->vc_font.height) && vyres > yres;
2039 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2040 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 2041 divides(vc->vc_font.height, vyres) &&
2042 divides(vc->vc_font.height, yres);
1da177e4 2043 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 2044 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2045 !(cap & FBINFO_HWACCEL_DISABLED);
2046 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2047 !(cap & FBINFO_HWACCEL_DISABLED);
2048
2049 p->vrows = vyres/fh;
2050 if (yres > (fh * (vc->vc_rows + 1)))
2051 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2052 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 2053 p->vrows--;
2054
2055 if (good_wrap || good_pan) {
2056 if (reading_fast || fast_copyarea)
e4fc2761
AD		 2057 p->scrollmode = good_wrap ?
2058 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 2059 else
2060 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2061 SCROLL_PAN_REDRAW;
2062 } else {
2063 if (reading_fast || (fast_copyarea && !fast_imageblit))
2064 p->scrollmode = SCROLL_MOVE;
2065 else
2066 p->scrollmode = SCROLL_REDRAW;
2067 }
2068}
2069
2070static int fbcon_resize(struct vc_data *vc, unsigned int width,
e400b6ec 2071 unsigned int height, unsigned int user)
1da177e4
LT		 2072{
2073 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2074 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2075 struct display *p = &fb_display[vc->vc_num];
2076 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2077 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2078
2079 virt_w = FBCON_SWAP(ops->rotate, width, height);
2080 virt_h = FBCON_SWAP(ops->rotate, height, width);
2081 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2082 vc->vc_font.height);
2083 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2084 vc->vc_font.width);
2085 var.xres = virt_w * virt_fw;
2086 var.yres = virt_h * virt_fh;
1da177e4
LT		 2087 x_diff = info->var.xres - var.xres;
2088 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2089 if (x_diff < 0 || x_diff > virt_fw ||
2090 y_diff < 0 || y_diff > virt_fh) {
9791d763 2091 const struct fb_videomode *mode;
1da177e4
LT		 2092
2093 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2094 mode = fb_find_best_mode(&var, &info->modelist);
2095 if (mode == NULL)
2096 return -EINVAL;
3084a895 2097 display_to_var(&var, p);
1da177e4 2098 fb_videomode_to_var(&var, mode);
3084a895 2099
e4fc2761 2100 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2101 return -EINVAL;
1da177e4
LT		 2102
2103 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2104 if (CON_IS_VISIBLE(vc)) {
2105 var.activate = FB_ACTIVATE_NOW |
2106 FB_ACTIVATE_FORCE;
2107 fb_set_var(info, &var);
2108 }
2109 var_to_display(p, &info->var, info);
e4fc2761 2110 ops->var = info->var;
1da177e4
LT		 2111 }
2112 updatescrollmode(p, info, vc);
2113 return 0;
2114}
2115
2116static int fbcon_switch(struct vc_data *vc)
2117{
88fb2c6e 2118 struct fb_info *info, *old_info = NULL;
e4fc2761 2119 struct fbcon_ops *ops;
1da177e4
LT		 2120 struct display *p = &fb_display[vc->vc_num];
2121 struct fb_var_screeninfo var;
56f0d64d 2122 int i, prev_console, charcnt = 256;
1da177e4
LT		 2123
2124 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2125 ops = info->fbcon_par;
1da177e4
LT		 2126
2127 if (softback_top) {
1da177e4
LT		 2128 if (softback_lines)
2129 fbcon_set_origin(vc);
2130 softback_top = softback_curr = softback_in = softback_buf;
2131 softback_lines = 0;
4d9c5b6e 2132 fbcon_update_softback(vc);
1da177e4
LT		 2133 }
2134
2135 if (logo_shown >= 0) {
2136 struct vc_data *conp2 = vc_cons[logo_shown].d;
2137
2138 if (conp2->vc_top == logo_lines
2139 && conp2->vc_bottom == conp2->vc_rows)
2140 conp2->vc_top = 0;
2141 logo_shown = FBCON_LOGO_CANSHOW;
2142 }
2143
e4fc2761 2144 prev_console = ops->currcon;
88fb2c6e
AD		 2145 if (prev_console != -1)
2146 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2147 /*
2148 * FIXME: If we have multiple fbdev's loaded, we need to
2149 * update all info->currcon. Perhaps, we can place this
2150 * in a centralized structure, but this might break some
2151 * drivers.
2152 *
2153 * info->currcon = vc->vc_num;
2154 */
2155 for (i = 0; i < FB_MAX; i++) {
2156 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2157 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2158
e4fc2761 2159 o->currcon = vc->vc_num;
1da177e4
LT		 2160 }
2161 }
2162 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2163 display_to_var(&var, p);
2164 var.activate = FB_ACTIVATE_NOW;
2165
2166 /*
2167 * make sure we don't unnecessarily trip the memcmp()
2168 * in fb_set_var()
2169 */
2170 info->var.activate = var.activate;
10732c35 2171 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
1da177e4 2172 fb_set_var(info, &var);
e4fc2761 2173 ops->var = info->var;
1da177e4 2174
39942fd8
KP		 2175 if (old_info != NULL && (old_info != info ||
2176 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
88fb2c6e
AD		 2177 if (info->fbops->fb_set_par)
2178 info->fbops->fb_set_par(info);
a39bc34e 2179
5428b044 2180 if (old_info != info)
a39bc34e 2181 fbcon_del_cursor_timer(old_info);
88fb2c6e 2182 }
1da177e4 2183
212f2639
AD		 2184 if (fbcon_is_inactive(vc, info) ||
2185 ops->blank_state != FB_BLANK_UNBLANK)
2186 fbcon_del_cursor_timer(info);
2187 else
2188 fbcon_add_cursor_timer(info);
2189
b73deed3 2190 set_blitting_type(vc, info);
e4fc2761
AD		 2191 ops->cursor_reset = 1;
2192
b73deed3 2193 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2194 ops->rotate = FB_ROTATE_UR;
b73deed3 2195 set_blitting_type(vc, info);
e4fc2761 2196 }
1da177e4 2197
b8c90945 2198 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2199 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2200
2201 if (p->userfont)
2202 charcnt = FNTCHARCNT(vc->vc_font.data);
2203
2204 if (charcnt > 256)
2205 vc->vc_complement_mask <<= 1;
2206
1da177e4
LT		 2207 updatescrollmode(p, info, vc);
2208
2209 switch (p->scrollmode) {
2210 case SCROLL_WRAP_MOVE:
2211 scrollback_phys_max = p->vrows - vc->vc_rows;
2212 break;
2213 case SCROLL_PAN_MOVE:
2214 case SCROLL_PAN_REDRAW:
2215 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2216 if (scrollback_phys_max < 0)
2217 scrollback_phys_max = 0;
2218 break;
2219 default:
2220 scrollback_phys_max = 0;
2221 break;
2222 }
e4fc2761 2223
1da177e4
LT		 2224 scrollback_max = 0;
2225 scrollback_current = 0;
4e1567d3
AD		 2226
2227 if (!fbcon_is_inactive(vc, info)) {
2228 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2229 ops->update_start(info);
2230 }
2231
1da177e4
LT		 2232 fbcon_set_palette(vc, color_table);
2233 fbcon_clear_margins(vc, 0);
2234
2235 if (logo_shown == FBCON_LOGO_DRAW) {
2236
2237 logo_shown = fg_console;
2238 /* This is protected above by initmem_freed */
9c44e5f6 2239 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2240 update_region(vc,
2241 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2242 vc->vc_size_row * (vc->vc_bottom -
2243 vc->vc_top) / 2);
2244 return 0;
2245 }
2246 return 1;
2247}
2248
2249static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2250 int blank)
2251{
994efacd
RP		 2252 struct fb_event event;
2253
1da177e4
LT		 2254 if (blank) {
2255 unsigned short charmask = vc->vc_hi_font_mask ?
2256 0x1ff : 0xff;
2257 unsigned short oldc;
2258
2259 oldc = vc->vc_video_erase_char;
2260 vc->vc_video_erase_char &= charmask;
2261 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2262 vc->vc_video_erase_char = oldc;
2263 }
994efacd
RP		 2264
2265
513adb58
AR		 2266 if (!lock_fb_info(info))
2267 return;
994efacd
RP		 2268 event.info = info;
2269 event.data = &blank;
2270 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
513adb58 2271 unlock_fb_info(info);
1da177e4
LT		 2272}
2273
2274static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2275{
2276 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2277 struct fbcon_ops *ops = info->fbcon_par;
2278
2279 if (mode_switch) {
2280 struct fb_var_screeninfo var = info->var;
2281
2282 ops->graphics = 1;
2283
2284 if (!blank) {
47434847
AD		 2285 if (info->fbops->fb_save_state)
2286 info->fbops->fb_save_state(info);
1da177e4
LT		 2287 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2288 fb_set_var(info, &var);
2289 ops->graphics = 0;
e4fc2761 2290 ops->var = info->var;
47434847
AD		 2291 } else if (info->fbops->fb_restore_state)
2292 info->fbops->fb_restore_state(info);
1da177e4
LT		 2293 }
2294
2295 if (!fbcon_is_inactive(vc, info)) {
2296 if (ops->blank_state != blank) {
2297 ops->blank_state = blank;
2298 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2299 ops->cursor_flash = (!blank);
2300
bca404af
DB		 2301 if (!(info->flags & FBINFO_MISC_USEREVENT))
2302 if (fb_blank(info, blank))
2303 fbcon_generic_blank(vc, info, blank);
1da177e4
LT		 2304 }
2305
88fb2c6e
AD		 2306 if (!blank)
2307 update_screen(vc);
2308 }
2309
4d8a2d98 2310 if (mode_switch || fbcon_is_inactive(vc, info) ||
212f2639 2311 ops->blank_state != FB_BLANK_UNBLANK)
88fb2c6e 2312 fbcon_del_cursor_timer(info);
212f2639
AD		 2313 else
2314 fbcon_add_cursor_timer(info);
1da177e4 2315
88fb2c6e 2316 return 0;
1da177e4
LT		 2317}
2318
1da177e4
LT		 2319static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2320{
2321 u8 *fontdata = vc->vc_font.data;
2322 u8 *data = font->data;
2323 int i, j;
2324
2325 font->width = vc->vc_font.width;
2326 font->height = vc->vc_font.height;
2327 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2328 if (!font->data)
2329 return 0;
2330
2331 if (font->width <= 8) {
2332 j = vc->vc_font.height;
2333 for (i = 0; i < font->charcount; i++) {
2334 memcpy(data, fontdata, j);
2335 memset(data + j, 0, 32 - j);
2336 data += 32;
2337 fontdata += j;
2338 }
2339 } else if (font->width <= 16) {
2340 j = vc->vc_font.height * 2;
2341 for (i = 0; i < font->charcount; i++) {
2342 memcpy(data, fontdata, j);
2343 memset(data + j, 0, 64 - j);
2344 data += 64;
2345 fontdata += j;
2346 }
2347 } else if (font->width <= 24) {
2348 for (i = 0; i < font->charcount; i++) {
2349 for (j = 0; j < vc->vc_font.height; j++) {
2350 *data++ = fontdata[0];
2351 *data++ = fontdata[1];
2352 *data++ = fontdata[2];
2353 fontdata += sizeof(u32);
2354 }
2355 memset(data, 0, 3 * (32 - j));
2356 data += 3 * (32 - j);
2357 }
2358 } else {
2359 j = vc->vc_font.height * 4;
2360 for (i = 0; i < font->charcount; i++) {
2361 memcpy(data, fontdata, j);
2362 memset(data + j, 0, 128 - j);
2363 data += 128;
2364 fontdata += j;
2365 }
2366 }
2367 return 0;
2368}
2369
2370static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2371 const u8 * data, int userfont)
1da177e4
LT		 2372{
2373 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2374 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2375 struct display *p = &fb_display[vc->vc_num];
2376 int resize;
2377 int cnt;
2378 char *old_data = NULL;
2379
2380 if (CON_IS_VISIBLE(vc) && softback_lines)
2381 fbcon_set_origin(vc);
2382
2383 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2384 if (p->userfont)
2385 old_data = vc->vc_font.data;
2386 if (userfont)
2387 cnt = FNTCHARCNT(data);
2388 else
2389 cnt = 256;
2f4516db 2390 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2391 if ((p->userfont = userfont))
2392 REFCOUNT(data)++;
2393 vc->vc_font.width = w;
2394 vc->vc_font.height = h;
2395 if (vc->vc_hi_font_mask && cnt == 256) {
2396 vc->vc_hi_font_mask = 0;
2397 if (vc->vc_can_do_color) {
2398 vc->vc_complement_mask >>= 1;
2399 vc->vc_s_complement_mask >>= 1;
2400 }
2401
2402 /* ++Edmund: reorder the attribute bits */
2403 if (vc->vc_can_do_color) {
2404 unsigned short *cp =
2405 (unsigned short *) vc->vc_origin;
2406 int count = vc->vc_screenbuf_size / 2;
2407 unsigned short c;
2408 for (; count > 0; count--, cp++) {
2409 c = scr_readw(cp);
2410 scr_writew(((c & 0xfe00) >> 1) |
2411 (c & 0xff), cp);
2412 }
2413 c = vc->vc_video_erase_char;
2414 vc->vc_video_erase_char =
2415 ((c & 0xfe00) >> 1) | (c & 0xff);
2416 vc->vc_attr >>= 1;
2417 }
2418 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2419 vc->vc_hi_font_mask = 0x100;
2420 if (vc->vc_can_do_color) {
2421 vc->vc_complement_mask <<= 1;
2422 vc->vc_s_complement_mask <<= 1;
2423 }
2424
2425 /* ++Edmund: reorder the attribute bits */
2426 {
2427 unsigned short *cp =
2428 (unsigned short *) vc->vc_origin;
2429 int count = vc->vc_screenbuf_size / 2;
2430 unsigned short c;
2431 for (; count > 0; count--, cp++) {
2432 unsigned short newc;
2433 c = scr_readw(cp);
2434 if (vc->vc_can_do_color)
2435 newc =
2436 ((c & 0xff00) << 1) | (c &
2437 0xff);
2438 else
2439 newc = c & ~0x100;
2440 scr_writew(newc, cp);
2441 }
2442 c = vc->vc_video_erase_char;
2443 if (vc->vc_can_do_color) {
2444 vc->vc_video_erase_char =
2445 ((c & 0xff00) << 1) | (c & 0xff);
2446 vc->vc_attr <<= 1;
93f78da4 2447 } else
1da177e4
LT		 2448 vc->vc_video_erase_char = c & ~0x100;
2449 }
2450
2451 }
2452
2453 if (resize) {
e4fc2761
AD		 2454 int cols, rows;
2455
2456 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2457 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2458 cols /= w;
2459 rows /= h;
2460 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2461 if (CON_IS_VISIBLE(vc) && softback_buf)
2462 fbcon_update_softback(vc);
1da177e4
LT		 2463 } else if (CON_IS_VISIBLE(vc)
2464 && vc->vc_mode == KD_TEXT) {
2465 fbcon_clear_margins(vc, 0);
2466 update_screen(vc);
2467 }
2468
2469 if (old_data && (--REFCOUNT(old_data) == 0))
2470 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2471 return 0;
2472}
2473
2474static int fbcon_copy_font(struct vc_data *vc, int con)
2475{
2476 struct display *od = &fb_display[con];
2477 struct console_font *f = &vc->vc_font;
2478
2479 if (od->fontdata == f->data)
2480 return 0; /* already the same font... */
2481 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2482}
2483
2484/*
2485 * User asked to set font; we are guaranteed that
2486 * a) width and height are in range 1..32
2487 * b) charcount does not exceed 512
2488 * but lets not assume that, since someone might someday want to use larger
2489 * fonts. And charcount of 512 is small for unicode support.
2490 *
2491 * However, user space gives the font in 32 rows , regardless of
2492 * actual font height. So a new API is needed if support for larger fonts
2493 * is ever implemented.
2494 */
2495
2496static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2497{
2d2699d9 2498 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1da177e4
LT		 2499 unsigned charcount = font->charcount;
2500 int w = font->width;
2501 int h = font->height;
2502 int size;
2503 int i, csum;
2504 u8 *new_data, *data = font->data;
2505 int pitch = (font->width+7) >> 3;
2506
2507 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2508 * If not this check should be changed to charcount < 256 */
2509 if (charcount != 256 && charcount != 512)
2510 return -EINVAL;
2511
2d2699d9
AD		 2512 /* Make sure drawing engine can handle the font */
2513 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2514 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2515 return -EINVAL;
38b4982c
AD		 2516
2517 /* Make sure driver can handle the font length */
2518 if (fbcon_invalid_charcount(info, charcount))
2519 return -EINVAL;
2d2699d9 2520
1da177e4
LT		 2521 size = h * pitch * charcount;
2522
2523 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2524
2525 if (!new_data)
2526 return -ENOMEM;
2527
2528 new_data += FONT_EXTRA_WORDS * sizeof(int);
2529 FNTSIZE(new_data) = size;
2530 FNTCHARCNT(new_data) = charcount;
2531 REFCOUNT(new_data) = 0; /* usage counter */
2532 for (i=0; i< charcount; i++) {
2533 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2534 }
2535
2536 /* Since linux has a nice crc32 function use it for counting font
2537 * checksums. */
2538 csum = crc32(0, new_data, size);
2539
2540 FNTSUM(new_data) = csum;
2541 /* Check if the same font is on some other console already */
e614b18d 2542 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2543 struct vc_data *tmp = vc_cons[i].d;
2544
2545 if (fb_display[i].userfont &&
2546 fb_display[i].fontdata &&
2547 FNTSUM(fb_display[i].fontdata) == csum &&
2548 FNTSIZE(fb_display[i].fontdata) == size &&
2549 tmp->vc_font.width == w &&
2550 !memcmp(fb_display[i].fontdata, new_data, size)) {
2551 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2552 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2553 break;
2554 }
2555 }
2556 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2557}
2558
2559static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2560{
2561 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2562 const struct font_desc *f;
1da177e4
LT		 2563
2564 if (!name)
2d2699d9
AD		 2565 f = get_default_font(info->var.xres, info->var.yres,
2566 info->pixmap.blit_x, info->pixmap.blit_y);
1da177e4
LT		 2567 else if (!(f = find_font(name)))
2568 return -ENOENT;
2569
2570 font->width = f->width;
2571 font->height = f->height;
2572 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2573}
2574
2575static u16 palette_red[16];
2576static u16 palette_green[16];
2577static u16 palette_blue[16];
2578
2579static struct fb_cmap palette_cmap = {
2580 0, 16, palette_red, palette_green, palette_blue, NULL
2581};
2582
2583static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2584{
2585 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2586 int i, j, k, depth;
2587 u8 val;
2588
2589 if (fbcon_is_inactive(vc, info))
2590 return -EINVAL;
2591
2592 if (!CON_IS_VISIBLE(vc))
2593 return 0;
2594
b8c90945 2595 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2596 if (depth > 3) {
2597 for (i = j = 0; i < 16; i++) {
2598 k = table[i];
2599 val = vc->vc_palette[j++];
2600 palette_red[k] = (val << 8) | val;
2601 val = vc->vc_palette[j++];
2602 palette_green[k] = (val << 8) | val;
2603 val = vc->vc_palette[j++];
2604 palette_blue[k] = (val << 8) | val;
2605 }
2606 palette_cmap.len = 16;
2607 palette_cmap.start = 0;
2608 /*
2609 * If framebuffer is capable of less than 16 colors,
2610 * use default palette of fbcon.
2611 */
2612 } else
2613 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2614
2615 return fb_set_cmap(&palette_cmap, info);
2616}
2617
2618static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2619{
2620 unsigned long p;
2621 int line;
2622
2623 if (vc->vc_num != fg_console || !softback_lines)
2624 return (u16 *) (vc->vc_origin + offset);
2625 line = offset / vc->vc_size_row;
2626 if (line >= softback_lines)
2627 return (u16 *) (vc->vc_origin + offset -
2628 softback_lines * vc->vc_size_row);
2629 p = softback_curr + offset;
2630 if (p >= softback_end)
2631 p += softback_buf - softback_end;
2632 return (u16 *) p;
2633}
2634
2635static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2636 int *px, int *py)
2637{
2638 unsigned long ret;
2639 int x, y;
2640
2641 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2642 unsigned long offset = (pos - vc->vc_origin) / 2;
2643
2644 x = offset % vc->vc_cols;
2645 y = offset / vc->vc_cols;
2646 if (vc->vc_num == fg_console)
2647 y += softback_lines;
2648 ret = pos + (vc->vc_cols - x) * 2;
2649 } else if (vc->vc_num == fg_console && softback_lines) {
2650 unsigned long offset = pos - softback_curr;
2651
2652 if (pos < softback_curr)
2653 offset += softback_end - softback_buf;
2654 offset /= 2;
2655 x = offset % vc->vc_cols;
2656 y = offset / vc->vc_cols;
2657 ret = pos + (vc->vc_cols - x) * 2;
2658 if (ret == softback_end)
2659 ret = softback_buf;
2660 if (ret == softback_in)
2661 ret = vc->vc_origin;
2662 } else {
2663 /* Should not happen */
2664 x = y = 0;
2665 ret = vc->vc_origin;
2666 }
2667 if (px)
2668 *px = x;
2669 if (py)
2670 *py = y;
2671 return ret;
2672}
2673
2674/* As we might be inside of softback, we may work with non-contiguous buffer,
2675 that's why we have to use a separate routine. */
2676static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2677{
2678 while (cnt--) {
2679 u16 a = scr_readw(p);
2680 if (!vc->vc_can_do_color)
2681 a ^= 0x0800;
2682 else if (vc->vc_hi_font_mask == 0x100)
2683 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2684 (((a) & 0x0e00) << 4);
2685 else
2686 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2687 (((a) & 0x0700) << 4);
2688 scr_writew(a, p++);
2689 if (p == (u16 *) softback_end)
2690 p = (u16 *) softback_buf;
2691 if (p == (u16 *) softback_in)
2692 p = (u16 *) vc->vc_origin;
2693 }
2694}
2695
2696static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2697{
2698 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2699 struct fbcon_ops *ops = info->fbcon_par;
2c6cc35c 2700 struct display *disp = &fb_display[fg_console];
1da177e4
LT		 2701 int offset, limit, scrollback_old;
2702
2703 if (softback_top) {
2704 if (vc->vc_num != fg_console)
2705 return 0;
2706 if (vc->vc_mode != KD_TEXT || !lines)
2707 return 0;
2708 if (logo_shown >= 0) {
2709 struct vc_data *conp2 = vc_cons[logo_shown].d;
2710
2711 if (conp2->vc_top == logo_lines
2712 && conp2->vc_bottom == conp2->vc_rows)
2713 conp2->vc_top = 0;
2714 if (logo_shown == vc->vc_num) {
2715 unsigned long p, q;
2716 int i;
2717
2718 p = softback_in;
2719 q = vc->vc_origin +
2720 logo_lines * vc->vc_size_row;
2721 for (i = 0; i < logo_lines; i++) {
2722 if (p == softback_top)
2723 break;
2724 if (p == softback_buf)
2725 p = softback_end;
2726 p -= vc->vc_size_row;
2727 q -= vc->vc_size_row;
2728 scr_memcpyw((u16 *) q, (u16 *) p,
2729 vc->vc_size_row);
2730 }
308af929 2731 softback_in = softback_curr = p;
1da177e4
LT		 2732 update_region(vc, vc->vc_origin,
2733 logo_lines * vc->vc_cols);
2734 }
2735 logo_shown = FBCON_LOGO_CANSHOW;
2736 }
2737 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2c6cc35c 2738 fbcon_redraw_softback(vc, disp, lines);
1da177e4
LT		 2739 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2740 return 0;
2741 }
2742
2743 if (!scrollback_phys_max)
2744 return -ENOSYS;
2745
2746 scrollback_old = scrollback_current;
2747 scrollback_current -= lines;
2748 if (scrollback_current < 0)
2749 scrollback_current = 0;
2750 else if (scrollback_current > scrollback_max)
2751 scrollback_current = scrollback_max;
2752 if (scrollback_current == scrollback_old)
2753 return 0;
2754
2755 if (fbcon_is_inactive(vc, info))
2756 return 0;
2757
2758 fbcon_cursor(vc, CM_ERASE);
2759
2c6cc35c
MS		 2760 offset = disp->yscroll - scrollback_current;
2761 limit = disp->vrows;
2762 switch (disp->scrollmode) {
1da177e4
LT		 2763 case SCROLL_WRAP_MOVE:
2764 info->var.vmode |= FB_VMODE_YWRAP;
2765 break;
2766 case SCROLL_PAN_MOVE:
2767 case SCROLL_PAN_REDRAW:
2768 limit -= vc->vc_rows;
2769 info->var.vmode &= ~FB_VMODE_YWRAP;
2770 break;
2771 }
2772 if (offset < 0)
2773 offset += limit;
2774 else if (offset >= limit)
2775 offset -= limit;
e4fc2761
AD		 2776
2777 ops->var.xoffset = 0;
2778 ops->var.yoffset = offset * vc->vc_font.height;
2779 ops->update_start(info);
2780
1da177e4
LT		 2781 if (!scrollback_current)
2782 fbcon_cursor(vc, CM_DRAW);
2783 return 0;
2784}
2785
2786static int fbcon_set_origin(struct vc_data *vc)
2787{
2788 if (softback_lines)
2789 fbcon_scrolldelta(vc, softback_lines);
2790 return 0;
2791}
2792
2793static void fbcon_suspended(struct fb_info *info)
2794{
2795 struct vc_data *vc = NULL;
2796 struct fbcon_ops *ops = info->fbcon_par;
2797
2798 if (!ops || ops->currcon < 0)
2799 return;
2800 vc = vc_cons[ops->currcon].d;
2801
2802 /* Clear cursor, restore saved data */
2803 fbcon_cursor(vc, CM_ERASE);
2804}
2805
2806static void fbcon_resumed(struct fb_info *info)
2807{
2808 struct vc_data *vc;
2809 struct fbcon_ops *ops = info->fbcon_par;
2810
2811 if (!ops || ops->currcon < 0)
2812 return;
2813 vc = vc_cons[ops->currcon].d;
2814
2815 update_screen(vc);
2816}
2817
2818static void fbcon_modechanged(struct fb_info *info)
2819{
2820 struct fbcon_ops *ops = info->fbcon_par;
2821 struct vc_data *vc;
2822 struct display *p;
2823 int rows, cols;
2824
2825 if (!ops || ops->currcon < 0)
2826 return;
2827 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2828 if (vc->vc_mode != KD_TEXT ||
2829 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2830 return;
2831
2832 p = &fb_display[vc->vc_num];
b73deed3 2833 set_blitting_type(vc, info);
1da177e4
LT		 2834
2835 if (CON_IS_VISIBLE(vc)) {
2836 var_to_display(p, &info->var, info);
e4fc2761
AD		 2837 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2838 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2839 cols /= vc->vc_font.width;
2840 rows /= vc->vc_font.height;
1da177e4
LT		 2841 vc_resize(vc, cols, rows);
2842 updatescrollmode(p, info, vc);
2843 scrollback_max = 0;
2844 scrollback_current = 0;
4e1567d3
AD		 2845
2846 if (!fbcon_is_inactive(vc, info)) {
2847 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2848 ops->update_start(info);
2849 }
2850
1da177e4
LT		 2851 fbcon_set_palette(vc, color_table);
2852 update_screen(vc);
4d9c5b6e
AD		 2853 if (softback_buf)
2854 fbcon_update_softback(vc);
1da177e4
LT		 2855 }
2856}
2857
7726e9e1
AD		 2858static void fbcon_set_all_vcs(struct fb_info *info)
2859{
2860 struct fbcon_ops *ops = info->fbcon_par;
2861 struct vc_data *vc;
2862 struct display *p;
95d67bb1 2863 int i, rows, cols, fg = -1;
7726e9e1
AD		 2864
2865 if (!ops || ops->currcon < 0)
2866 return;
2867
e614b18d 2868 for (i = first_fb_vc; i <= last_fb_vc; i++) {
7726e9e1
AD		 2869 vc = vc_cons[i].d;
2870 if (!vc || vc->vc_mode != KD_TEXT ||
2871 registered_fb[con2fb_map[i]] != info)
2872 continue;
2873
95d67bb1
AD		 2874 if (CON_IS_VISIBLE(vc)) {
2875 fg = i;
2876 continue;
2877 }
2878
7726e9e1 2879 p = &fb_display[vc->vc_num];
b73deed3 2880 set_blitting_type(vc, info);
7726e9e1 2881 var_to_display(p, &info->var, info);
232fb69a
ON		 2882 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2883 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
e4fc2761
AD		 2884 cols /= vc->vc_font.width;
2885 rows /= vc->vc_font.height;
7726e9e1 2886 vc_resize(vc, cols, rows);
7726e9e1 2887 }
04a2fe57 2888
95d67bb1
AD		 2889 if (fg != -1)
2890 fbcon_modechanged(info);
7726e9e1
AD		 2891}
2892
1da177e4
LT		 2893static int fbcon_mode_deleted(struct fb_info *info,
2894 struct fb_videomode *mode)
2895{
2896 struct fb_info *fb_info;
2897 struct display *p;
2898 int i, j, found = 0;
2899
2900 /* before deletion, ensure that mode is not in use */
2901 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2902 j = con2fb_map[i];
2903 if (j == -1)
2904 continue;
2905 fb_info = registered_fb[j];
2906 if (fb_info != info)
2907 continue;
2908 p = &fb_display[i];
2909 if (!p || !p->mode)
2910 continue;
2911 if (fb_mode_is_equal(p->mode, mode)) {
2912 found = 1;
2913 break;
2914 }
2915 }
2916 return found;
2917}
2918
cfafca80
JB		 2919#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2920static int fbcon_unbind(void)
2921{
2922 int ret;
2923
2924 ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2925 fbcon_is_default);
2926 return ret;
2927}
2928#else
2929static inline int fbcon_unbind(void)
2930{
2931 return -EINVAL;
2932}
2933#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2934
2935static int fbcon_fb_unbind(int idx)
2936{
2937 int i, new_idx = -1, ret = 0;
2938
2939 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2940 if (con2fb_map[i] != idx &&
2941 con2fb_map[i] != -1) {
2942 new_idx = i;
2943 break;
2944 }
2945 }
2946
2947 if (new_idx != -1) {
2948 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2949 if (con2fb_map[i] == idx)
2950 set_con2fb_map(i, new_idx, 0);
2951 }
2952 } else
2953 ret = fbcon_unbind();
2954
2955 return ret;
2956}
2957
623e71b0 2958static int fbcon_fb_unregistered(struct fb_info *info)
e614b18d 2959{
66c1ca01 2960 int i, idx;
e614b18d 2961
66c1ca01 2962 idx = info->node;
e614b18d
AD		 2963 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2964 if (con2fb_map[i] == idx)
2965 con2fb_map[i] = -1;
2966 }
2967
2968 if (idx == info_idx) {
2969 info_idx = -1;
2970
2971 for (i = 0; i < FB_MAX; i++) {
2972 if (registered_fb[i] != NULL) {
2973 info_idx = i;
2974 break;
2975 }
2976 }
2977 }
2978
2979 if (info_idx != -1) {
2980 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2981 if (con2fb_map[i] == -1)
2982 con2fb_map[i] = info_idx;
2983 }
2984 }
2985
623e71b0
AD		 2986 if (primary_device == idx)
2987 primary_device = -1;
2988
66c1ca01
AR		 2989 if (!num_registered_fb)
2990 unregister_con_driver(&fb_con);
2991
623e71b0
AD		 2992 return 0;
2993}
2994
2995#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
afd1db16 2996static void fbcon_select_primary(struct fb_info *info)
623e71b0 2997{
623e71b0
AD		 2998 if (!map_override && primary_device == -1 &&
2999 fb_is_primary_device(info)) {
afd1db16 3000 int i;
623e71b0 3001
afd1db16
AD		 3002 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3003 info->fix.id, info->node);
623e71b0
AD		 3004 primary_device = info->node;
3005
afd1db16 3006 for (i = first_fb_vc; i <= last_fb_vc; i++)
623e71b0 3007 con2fb_map_boot[i] = primary_device;
623e71b0 3008
afd1db16
AD		 3009 if (con_is_bound(&fb_con)) {
3010 printk(KERN_INFO "fbcon: Remapping primary device, "
3011 "fb%i, to tty %i-%i\n", info->node,
3012 first_fb_vc + 1, last_fb_vc + 1);
3013 info_idx = primary_device;
623e71b0 3014 }
623e71b0
AD		 3015 }
3016
623e71b0
AD		 3017}
3018#else
afd1db16 3019static inline void fbcon_select_primary(struct fb_info *info)
623e71b0 3020{
afd1db16 3021 return;
e614b18d 3022}
623e71b0 3023#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
e614b18d 3024
623e71b0 3025static int fbcon_fb_registered(struct fb_info *info)
1da177e4 3026{
66c1ca01 3027 int ret = 0, i, idx;
623e71b0 3028
66c1ca01 3029 idx = info->node;
afd1db16 3030 fbcon_select_primary(info);
1da177e4
LT		 3031
3032 if (info_idx == -1) {
e614b18d 3033 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3034 if (con2fb_map_boot[i] == idx) {
3035 info_idx = idx;
3036 break;
3037 }
3038 }
e614b18d 3039
1da177e4
LT		 3040 if (info_idx != -1)
3041 ret = fbcon_takeover(1);
3042 } else {
e614b18d 3043 for (i = first_fb_vc; i <= last_fb_vc; i++) {
d1baa4ff 3044 if (con2fb_map_boot[i] == idx)
1da177e4
LT		 3045 set_con2fb_map(i, idx, 0);
3046 }
3047 }
3048
3049 return ret;
3050}
3051
3052static void fbcon_fb_blanked(struct fb_info *info, int blank)
3053{
3054 struct fbcon_ops *ops = info->fbcon_par;
3055 struct vc_data *vc;
3056
3057 if (!ops || ops->currcon < 0)
3058 return;
3059
3060 vc = vc_cons[ops->currcon].d;
3061 if (vc->vc_mode != KD_TEXT ||
3062 registered_fb[con2fb_map[ops->currcon]] != info)
3063 return;
3064
3065 if (CON_IS_VISIBLE(vc)) {
3066 if (blank)
3067 do_blank_screen(0);
3068 else
3069 do_unblank_screen(0);
3070 }
3071 ops->blank_state = blank;
3072}
3073
3074static void fbcon_new_modelist(struct fb_info *info)
3075{
3076 int i;
3077 struct vc_data *vc;
3078 struct fb_var_screeninfo var;
9791d763 3079 const struct fb_videomode *mode;
1da177e4 3080
e614b18d 3081 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3082 if (registered_fb[con2fb_map[i]] != info)
3083 continue;
3084 if (!fb_display[i].mode)
3085 continue;
3086 vc = vc_cons[i].d;
3087 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 3088 mode = fb_find_nearest_mode(fb_display[i].mode,
3089 &info->modelist);
1da177e4 3090 fb_videomode_to_var(&var, mode);
d1baa4ff 3091 fbcon_set_disp(info, &var, vc->vc_num);
1da177e4
LT		 3092 }
3093}
3094
38a3dc51
AD		 3095static void fbcon_get_requirement(struct fb_info *info,
3096 struct fb_blit_caps *caps)
3097{
3098 struct vc_data *vc;
3099 struct display *p;
38a3dc51
AD		 3100
3101 if (caps->flags) {
167f07f1 3102 int i, charcnt;
38a3dc51
AD		 3103
3104 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3105 vc = vc_cons[i].d;
167f07f1
AD		 3106 if (vc && vc->vc_mode == KD_TEXT &&
3107 info->node == con2fb_map[i]) {
38a3dc51
AD		 3108 p = &fb_display[i];
3109 caps->x |= 1 << (vc->vc_font.width - 1);
3110 caps->y |= 1 << (vc->vc_font.height - 1);
3111 charcnt = (p->userfont) ?
3112 FNTCHARCNT(p->fontdata) : 256;
3113 if (caps->len < charcnt)
3114 caps->len = charcnt;
3115 }
3116 }
3117 } else {
3118 vc = vc_cons[fg_console].d;
3119
167f07f1
AD		 3120 if (vc && vc->vc_mode == KD_TEXT &&
3121 info->node == con2fb_map[fg_console]) {
38a3dc51 3122 p = &fb_display[fg_console];
167f07f1
AD		 3123 caps->x = 1 << (vc->vc_font.width - 1);
3124 caps->y = 1 << (vc->vc_font.height - 1);
3125 caps->len = (p->userfont) ?
38a3dc51 3126 FNTCHARCNT(p->fontdata) : 256;
38a3dc51
AD		 3127 }
3128 }
3129}
3130
66c1ca01 3131static int fbcon_event_notify(struct notifier_block *self,
1da177e4
LT		 3132 unsigned long action, void *data)
3133{
3134 struct fb_event *event = data;
3135 struct fb_info *info = event->info;
3136 struct fb_videomode *mode;
3137 struct fb_con2fbmap *con2fb;
38a3dc51 3138 struct fb_blit_caps *caps;
66c1ca01 3139 int idx, ret = 0;
1da177e4 3140
e614b18d
AD		 3141 /*
3142 * ignore all events except driver registration and deregistration
3143 * if fbcon is not active
3144 */
3145 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3146 action == FB_EVENT_FB_UNREGISTERED))
3147 goto done;
3148
1da177e4
LT		 3149 switch(action) {
3150 case FB_EVENT_SUSPEND:
3151 fbcon_suspended(info);
3152 break;
3153 case FB_EVENT_RESUME:
3154 fbcon_resumed(info);
3155 break;
3156 case FB_EVENT_MODE_CHANGE:
3157 fbcon_modechanged(info);
3158 break;
7726e9e1
AD		 3159 case FB_EVENT_MODE_CHANGE_ALL:
3160 fbcon_set_all_vcs(info);
3161 break;
1da177e4
LT		 3162 case FB_EVENT_MODE_DELETE:
3163 mode = event->data;
3164 ret = fbcon_mode_deleted(info, mode);
3165 break;
cfafca80 3166 case FB_EVENT_FB_UNBIND:
66c1ca01 3167 idx = info->node;
66c1ca01 3168 ret = fbcon_fb_unbind(idx);
cfafca80 3169 break;
1da177e4 3170 case FB_EVENT_FB_REGISTERED:
623e71b0 3171 ret = fbcon_fb_registered(info);
1da177e4 3172 break;
e614b18d 3173 case FB_EVENT_FB_UNREGISTERED:
623e71b0 3174 ret = fbcon_fb_unregistered(info);
e614b18d 3175 break;
1da177e4
LT		 3176 case FB_EVENT_SET_CONSOLE_MAP:
3177 con2fb = event->data;
3178 ret = set_con2fb_map(con2fb->console - 1,
3179 con2fb->framebuffer, 1);
3180 break;
3181 case FB_EVENT_GET_CONSOLE_MAP:
3182 con2fb = event->data;
3183 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3184 break;
3185 case FB_EVENT_BLANK:
3186 fbcon_fb_blanked(info, *(int *)event->data);
3187 break;
3188 case FB_EVENT_NEW_MODELIST:
3189 fbcon_new_modelist(info);
3190 break;
38a3dc51
AD		 3191 case FB_EVENT_GET_REQ:
3192 caps = event->data;
3193 fbcon_get_requirement(info, caps);
3194 break;
1da177e4 3195 }
e614b18d 3196done:
1da177e4
LT		 3197 return ret;
3198}
3199
3200/*
3201 * The console `switch' structure for the frame buffer based console
3202 */
3203
3204static const struct consw fb_con = {
3205 .owner = THIS_MODULE,
3206 .con_startup = fbcon_startup,
3207 .con_init = fbcon_init,
3208 .con_deinit = fbcon_deinit,
3209 .con_clear = fbcon_clear,
3210 .con_putc = fbcon_putc,
3211 .con_putcs = fbcon_putcs,
3212 .con_cursor = fbcon_cursor,
3213 .con_scroll = fbcon_scroll,
3214 .con_bmove = fbcon_bmove,
3215 .con_switch = fbcon_switch,
3216 .con_blank = fbcon_blank,
3217 .con_font_set = fbcon_set_font,
3218 .con_font_get = fbcon_get_font,
3219 .con_font_default = fbcon_set_def_font,
3220 .con_font_copy = fbcon_copy_font,
3221 .con_set_palette = fbcon_set_palette,
3222 .con_scrolldelta = fbcon_scrolldelta,
3223 .con_set_origin = fbcon_set_origin,
3224 .con_invert_region = fbcon_invert_region,
3225 .con_screen_pos = fbcon_screen_pos,
3226 .con_getxy = fbcon_getxy,
3227 .con_resize = fbcon_resize,
3228};
3229
3230static struct notifier_block fbcon_event_notifier = {
3231 .notifier_call = fbcon_event_notify,
3232};
3233
0c6c1ce0
AD		 3234static ssize_t store_rotate(struct device *device,
3235 struct device_attribute *attr, const char *buf,
3236 size_t count)
9a179176
AD		 3237{
3238 struct fb_info *info;
3239 int rotate, idx;
3240 char **last = NULL;
3241
e614b18d
AD		 3242 if (fbcon_has_exited)
3243 return count;
3244
9a179176
AD		 3245 acquire_console_sem();
3246 idx = con2fb_map[fg_console];
3247
3248 if (idx == -1 || registered_fb[idx] == NULL)
3249 goto err;
3250
3251 info = registered_fb[idx];
3252 rotate = simple_strtoul(buf, last, 0);
3253 fbcon_rotate(info, rotate);
3254err:
3255 release_console_sem();
3256 return count;
3257}
3258
0c6c1ce0
AD		 3259static ssize_t store_rotate_all(struct device *device,
3260 struct device_attribute *attr,const char *buf,
3261 size_t count)
9a179176
AD		 3262{
3263 struct fb_info *info;
3264 int rotate, idx;
3265 char **last = NULL;
3266
e614b18d
AD		 3267 if (fbcon_has_exited)
3268 return count;
3269
9a179176
AD		 3270 acquire_console_sem();
3271 idx = con2fb_map[fg_console];
3272
3273 if (idx == -1 || registered_fb[idx] == NULL)
3274 goto err;
3275
3276 info = registered_fb[idx];
3277 rotate = simple_strtoul(buf, last, 0);
3278 fbcon_rotate_all(info, rotate);
3279err:
3280 release_console_sem();
3281 return count;
3282}
3283
0c6c1ce0
AD		 3284static ssize_t show_rotate(struct device *device,
3285 struct device_attribute *attr,char *buf)
9a179176
AD		 3286{
3287 struct fb_info *info;
3288 int rotate = 0, idx;
3289
e614b18d
AD		 3290 if (fbcon_has_exited)
3291 return 0;
3292
9a179176
AD		 3293 acquire_console_sem();
3294 idx = con2fb_map[fg_console];
3295
3296 if (idx == -1 || registered_fb[idx] == NULL)
3297 goto err;
3298
3299 info = registered_fb[idx];
3300 rotate = fbcon_get_rotate(info);
3301err:
3302 release_console_sem();
3303 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3304}
3305
0c6c1ce0
AD		 3306static ssize_t show_cursor_blink(struct device *device,
3307 struct device_attribute *attr, char *buf)
acba9cd0
AD		 3308{
3309 struct fb_info *info;
3310 struct fbcon_ops *ops;
3311 int idx, blink = -1;
3312
3313 if (fbcon_has_exited)
3314 return 0;
3315
3316 acquire_console_sem();
3317 idx = con2fb_map[fg_console];
3318
3319 if (idx == -1 || registered_fb[idx] == NULL)
3320 goto err;
3321
3322 info = registered_fb[idx];
3323 ops = info->fbcon_par;
3324
3325 if (!ops)
3326 goto err;
3327
3328 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3329err:
3330 release_console_sem();
3331 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3332}
3333
0c6c1ce0
AD		 3334static ssize_t store_cursor_blink(struct device *device,
3335 struct device_attribute *attr,
acba9cd0
AD		 3336 const char *buf, size_t count)
3337{
3338 struct fb_info *info;
3339 int blink, idx;
3340 char **last = NULL;
3341
3342 if (fbcon_has_exited)
3343 return count;
3344
3345 acquire_console_sem();
3346 idx = con2fb_map[fg_console];
3347
3348 if (idx == -1 || registered_fb[idx] == NULL)
3349 goto err;
3350
3351 info = registered_fb[idx];
3352
3353 if (!info->fbcon_par)
3354 goto err;
3355
3356 blink = simple_strtoul(buf, last, 0);
3357
3358 if (blink) {
3359 fbcon_cursor_noblink = 0;
3360 fbcon_add_cursor_timer(info);
3361 } else {
3362 fbcon_cursor_noblink = 1;
3363 fbcon_del_cursor_timer(info);
3364 }
3365
3366err:
3367 release_console_sem();
3368 return count;
3369}
3370
0c6c1ce0 3371static struct device_attribute device_attrs[] = {
9a179176
AD		 3372 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3373 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
acba9cd0
AD		 3374 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3375 store_cursor_blink),
9a179176
AD		 3376};
3377
0c6c1ce0 3378static int fbcon_init_device(void)
9a179176 3379{
0a727dea
AD		 3380 int i, error = 0;
3381
3382 fbcon_has_sysfs = 1;
3383
0c6c1ce0
AD		 3384 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3385 error = device_create_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3386
3387 if (error)
3388 break;
3389 }
3390
3391 if (error) {
3392 while (--i >= 0)
0c6c1ce0 3393 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3394
3395 fbcon_has_sysfs = 0;
3396 }
9a179176 3397
9a179176
AD		 3398 return 0;
3399}
3400
5428b044 3401static void fbcon_start(void)
1da177e4 3402{
5428b044
AD		 3403 if (num_registered_fb) {
3404 int i;
9a179176 3405
5428b044 3406 acquire_console_sem();
1da177e4 3407
1da177e4
LT		 3408 for (i = 0; i < FB_MAX; i++) {
3409 if (registered_fb[i] != NULL) {
3410 info_idx = i;
3411 break;
3412 }
3413 }
5428b044
AD		 3414
3415 release_console_sem();
1da177e4
LT		 3416 fbcon_takeover(0);
3417 }
9a179176
AD		 3418}
3419
5428b044 3420static void fbcon_exit(void)
9a179176 3421{
e55186fe
AD		 3422 struct fb_info *info;
3423 int i, j, mapped;
3424
e614b18d
AD		 3425 if (fbcon_has_exited)
3426 return;
3427
e55186fe 3428 kfree((void *)softback_buf);
5428b044 3429 softback_buf = 0UL;
e55186fe
AD		 3430
3431 for (i = 0; i < FB_MAX; i++) {
beaa4867
GL		 3432 int pending;
3433
e55186fe
AD		 3434 mapped = 0;
3435 info = registered_fb[i];
3436
3437 if (info == NULL)
3438 continue;
3439
beaa4867
GL		 3440 pending = cancel_work_sync(&info->queue);
3441 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3442 "no"));
3443
e614b18d
AD		 3444 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3445 if (con2fb_map[j] == i)
e55186fe 3446 mapped = 1;
e55186fe
AD		 3447 }
3448
3449 if (mapped) {
3450 if (info->fbops->fb_release)
3451 info->fbops->fb_release(info, 0);
3452 module_put(info->fbops->owner);
5428b044
AD		 3453
3454 if (info->fbcon_par) {
e299dd4d
DJ		 3455 struct fbcon_ops *ops = info->fbcon_par;
3456
5428b044 3457 fbcon_del_cursor_timer(info);
e299dd4d 3458 kfree(ops->cursor_src);
5428b044
AD		 3459 kfree(info->fbcon_par);
3460 info->fbcon_par = NULL;
3461 }
3462
3463 if (info->queue.func == fb_flashcursor)
3464 info->queue.func = NULL;
e55186fe
AD		 3465 }
3466 }
3467
e614b18d 3468 fbcon_has_exited = 1;
5428b044
AD		 3469}
3470
3471static int __init fb_console_init(void)
3472{
3473 int i;
3474
3475 acquire_console_sem();
3476 fb_register_client(&fbcon_event_notifier);
77997aaa
GKH		 3477 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3478 "fbcon");
5428b044 3479
0c6c1ce0
AD		 3480 if (IS_ERR(fbcon_device)) {
3481 printk(KERN_WARNING "Unable to create device "
5428b044 3482 "for fbcon; errno = %ld\n",
0c6c1ce0
AD		 3483 PTR_ERR(fbcon_device));
3484 fbcon_device = NULL;
5428b044 3485 } else
0c6c1ce0 3486 fbcon_init_device();
5428b044
AD		 3487
3488 for (i = 0; i < MAX_NR_CONSOLES; i++)
3489 con2fb_map[i] = -1;
3490
3491 release_console_sem();
3492 fbcon_start();
3493 return 0;
3494}
3495
3496module_init(fb_console_init);
3497
3498#ifdef MODULE
3499
0c6c1ce0 3500static void __exit fbcon_deinit_device(void)
5428b044
AD		 3501{
3502 int i;
3503
0a727dea 3504 if (fbcon_has_sysfs) {
0c6c1ce0
AD		 3505 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3506 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3507
3508 fbcon_has_sysfs = 0;
3509 }
9a179176
AD		 3510}
3511
1da177e4
LT		 3512static void __exit fb_console_exit(void)
3513{
3514 acquire_console_sem();
3515 fb_unregister_client(&fbcon_event_notifier);
0c6c1ce0
AD		 3516 fbcon_deinit_device();
3517 device_destroy(fb_class, MKDEV(0, 0));
e614b18d 3518 fbcon_exit();
1da177e4 3519 release_console_sem();
e614b18d 3520 unregister_con_driver(&fb_con);
1da177e4
LT		 3521}
3522
3523module_exit(fb_console_exit);
3524
3525#endif
3526
3527MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)