]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/video/console/fbcon.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
video: Fix possible leak in of_get_videomode()
[mirror_ubuntu-bionic-kernel.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 79#include <asm/irq.h>
1da177e4
LT		 80
81#include "fbcon.h"
82
83#ifdef FBCONDEBUG
5ae12170 84# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
1da177e4
LT		 85#else
86# define DPRINTK(fmt, args...)
87#endif
88
89enum {
90 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
91 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
92 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
93};
94
ab767201 95static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 96
1da177e4
LT		 97static signed char con2fb_map[MAX_NR_CONSOLES];
98static signed char con2fb_map_boot[MAX_NR_CONSOLES];
49a1d28f 99
1da177e4
LT		 100static int logo_lines;
101/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
102 enums. */
103static int logo_shown = FBCON_LOGO_CANSHOW;
104/* Software scrollback */
105static int fbcon_softback_size = 32768;
106static unsigned long softback_buf, softback_curr;
107static unsigned long softback_in;
108static unsigned long softback_top, softback_end;
109static int softback_lines;
110/* console mappings */
111static int first_fb_vc;
112static int last_fb_vc = MAX_NR_CONSOLES - 1;
113static int fbcon_is_default = 1;
e614b18d 114static int fbcon_has_exited;
623e71b0 115static int primary_device = -1;
2ddce3fd 116static int fbcon_has_console_bind;
4769a9a5
AD		 117
118#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
623e71b0 119static int map_override;
e614b18d 120
4769a9a5
AD		 121static inline void fbcon_map_override(void)
122{
123 map_override = 1;
124}
125#else
126static inline void fbcon_map_override(void)
127{
128}
129#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
130
1da177e4
LT		 131/* font data */
132static char fontname[40];
133
134/* current fb_info */
135static int info_idx = -1;
136
e4fc2761 137/* console rotation */
2428e59b 138static int initial_rotation;
0a727dea 139static int fbcon_has_sysfs;
e4fc2761 140
1da177e4
LT		 141static const struct consw fb_con;
142
143#define CM_SOFTBACK (8)
144
145#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
146
1da177e4
LT		 147static int fbcon_set_origin(struct vc_data *);
148
acba9cd0 149static int fbcon_cursor_noblink;
1da177e4
LT		 150
151#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153/*
154 * Interface used by the world
155 */
156
157static const char *fbcon_startup(void);
158static void fbcon_init(struct vc_data *vc, int init);
159static void fbcon_deinit(struct vc_data *vc);
160static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166static void fbcon_cursor(struct vc_data *vc, int mode);
167static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171static int fbcon_switch(struct vc_data *vc);
172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176/*
177 * Internal routines
178 */
1da177e4
LT		 179static __inline__ void ywrap_up(struct vc_data *vc, int count);
180static __inline__ void ywrap_down(struct vc_data *vc, int count);
181static __inline__ void ypan_up(struct vc_data *vc, int count);
182static __inline__ void ypan_down(struct vc_data *vc, int count);
183static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
184 int dy, int dx, int height, int width, u_int y_break);
185static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 186 int unit);
1da177e4
LT		 187static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
188 int line, int count, int dy);
a812c94b
AD		 189static void fbcon_modechanged(struct fb_info *info);
190static void fbcon_set_all_vcs(struct fb_info *info);
5428b044
AD		 191static void fbcon_start(void);
192static void fbcon_exit(void);
0c6c1ce0 193static struct device *fbcon_device;
9a179176 194
dbcbfe1e 195#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 196static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 197{
198 struct fbcon_ops *ops = info->fbcon_par;
199
200 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 201 ops->p->con_rotate < 4)
202 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 203 else
204 ops->rotate = 0;
205}
a812c94b
AD		 206
207static void fbcon_rotate(struct fb_info *info, u32 rotate)
208{
209 struct fbcon_ops *ops= info->fbcon_par;
210 struct fb_info *fb_info;
211
212 if (!ops || ops->currcon == -1)
213 return;
214
215 fb_info = registered_fb[con2fb_map[ops->currcon]];
216
217 if (info == fb_info) {
218 struct display *p = &fb_display[ops->currcon];
219
220 if (rotate < 4)
221 p->con_rotate = rotate;
222 else
223 p->con_rotate = 0;
224
225 fbcon_modechanged(info);
226 }
227}
228
229static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
230{
231 struct fbcon_ops *ops = info->fbcon_par;
232 struct vc_data *vc;
233 struct display *p;
234 int i;
235
236 if (!ops || ops->currcon < 0 || rotate > 3)
237 return;
238
e614b18d 239 for (i = first_fb_vc; i <= last_fb_vc; i++) {
a812c94b
AD		 240 vc = vc_cons[i].d;
241 if (!vc || vc->vc_mode != KD_TEXT ||
242 registered_fb[con2fb_map[i]] != info)
243 continue;
244
245 p = &fb_display[vc->vc_num];
246 p->con_rotate = rotate;
247 }
248
249 fbcon_set_all_vcs(info);
250}
dbcbfe1e 251#else
b73deed3 252static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 253{
254 struct fbcon_ops *ops = info->fbcon_par;
255
256 ops->rotate = FB_ROTATE_UR;
257}
a812c94b
AD		 258
259static void fbcon_rotate(struct fb_info *info, u32 rotate)
260{
261 return;
262}
263
264static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
265{
266 return;
267}
dbcbfe1e 268#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 269
a812c94b
AD		 270static int fbcon_get_rotate(struct fb_info *info)
271{
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 return (ops) ? ops->rotate : 0;
275}
276
1da177e4
LT		 277static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
278{
279 struct fbcon_ops *ops = info->fbcon_par;
280
281 return (info->state != FBINFO_STATE_RUNNING ||
8fd4bd22
JB		 282 vc->vc_mode != KD_TEXT || ops->graphics) &&
283 !vt_force_oops_output(vc);
1da177e4
LT		 284}
285
da909ce4 286static int get_color(struct vc_data *vc, struct fb_info *info,
1da177e4
LT		 287 u16 c, int is_fg)
288{
b8c90945 289 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 290 int color = 0;
291
292 if (console_blanked) {
293 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
294
295 c = vc->vc_video_erase_char & charmask;
296 }
297
298 if (depth != 1)
299 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
300 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
301
302 switch (depth) {
303 case 1:
304 {
91c43132 305 int col = mono_col(info);
1da177e4 306 /* 0 or 1 */
b8c90945
AD		 307 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
308 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 309
310 if (console_blanked)
311 fg = bg;
312
313 color = (is_fg) ? fg : bg;
314 break;
315 }
316 case 2:
317 /*
318 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 319 * is grayscale. However, simply dividing the values by 4
320 * will not work, as colors 1, 2 and 3 will be scaled-down
321 * to zero rendering them invisible. So empirically convert
322 * colors to a sane 4-level grayscale.
1da177e4 323 */
2cc38ed1
AD		 324 switch (color) {
325 case 0:
326 color = 0; /* black */
327 break;
328 case 1 ... 6:
329 color = 2; /* white */
330 break;
331 case 7 ... 8:
332 color = 1; /* gray */
333 break;
334 default:
335 color = 3; /* intense white */
336 break;
337 }
338 break;
1da177e4
LT		 339 case 3:
340 /*
341 * Last 8 entries of default 16-color palette is a more intense
342 * version of the first 8 (i.e., same chrominance, different
343 * luminance).
344 */
345 color &= 7;
346 break;
347 }
348
349
350 return color;
351}
352
4d9c5b6e
AD		 353static void fbcon_update_softback(struct vc_data *vc)
354{
355 int l = fbcon_softback_size / vc->vc_size_row;
356
357 if (l > 5)
358 softback_end = softback_buf + l * vc->vc_size_row;
359 else
360 /* Smaller scrollback makes no sense, and 0 would screw
361 the operation totally */
362 softback_top = 0;
363}
364
c4028958 365static void fb_flashcursor(struct work_struct *work)
1da177e4 366{
c4028958 367 struct fb_info *info = container_of(work, struct fb_info, queue);
1da177e4 368 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 369 struct vc_data *vc = NULL;
370 int c;
371 int mode;
d8636a27
DA		 372 int ret;
373
374 /* FIXME: we should sort out the unbind locking instead */
375 /* instead we just fail to flash the cursor if we can't get
376 * the lock instead of blocking fbcon deinit */
377 ret = console_trylock();
378 if (ret == 0)
379 return;
1da177e4 380
5428b044 381 if (ops && ops->currcon != -1)
1da177e4
LT		 382 vc = vc_cons[ops->currcon].d;
383
384 if (!vc || !CON_IS_VISIBLE(vc) ||
dbd4f128 385 registered_fb[con2fb_map[vc->vc_num]] != info ||
212f2639 386 vc->vc_deccm != 1) {
ac751efa 387 console_unlock();
1da177e4 388 return;
5428b044
AD		 389 }
390
1da177e4
LT		 391 c = scr_readw((u16 *) vc->vc_pos);
392 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
393 CM_ERASE : CM_DRAW;
b73deed3 394 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4 395 get_color(vc, info, c, 0));
ac751efa 396 console_unlock();
1da177e4
LT		 397}
398
1da177e4
LT		 399static void cursor_timer_handler(unsigned long dev_addr)
400{
401 struct fb_info *info = (struct fb_info *) dev_addr;
402 struct fbcon_ops *ops = info->fbcon_par;
403
a85f1a41 404 queue_work(system_power_efficient_wq, &info->queue);
27a4c827 405 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
1da177e4
LT		 406}
407
88fb2c6e
AD		 408static void fbcon_add_cursor_timer(struct fb_info *info)
409{
410 struct fbcon_ops *ops = info->fbcon_par;
411
412 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
acba9cd0
AD		 413 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
414 !fbcon_cursor_noblink) {
88fb2c6e 415 if (!info->queue.func)
c4028958 416 INIT_WORK(&info->queue, fb_flashcursor);
88fb2c6e
AD		 417
418 init_timer(&ops->cursor_timer);
419 ops->cursor_timer.function = cursor_timer_handler;
27a4c827 420 ops->cursor_timer.expires = jiffies + ops->cur_blink_jiffies;
88fb2c6e
AD		 421 ops->cursor_timer.data = (unsigned long ) info;
422 add_timer(&ops->cursor_timer);
423 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
424 }
425}
426
427static void fbcon_del_cursor_timer(struct fb_info *info)
428{
429 struct fbcon_ops *ops = info->fbcon_par;
430
431 if (info->queue.func == fb_flashcursor &&
432 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
433 del_timer_sync(&ops->cursor_timer);
434 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
435 }
436}
437
1da177e4
LT		 438#ifndef MODULE
439static int __init fb_console_setup(char *this_opt)
440{
441 char *options;
442 int i, j;
443
444 if (!this_opt || !*this_opt)
9b41046c 445 return 1;
1da177e4
LT		 446
447 while ((options = strsep(&this_opt, ",")) != NULL) {
37773c4e 448 if (!strncmp(options, "font:", 5)) {
e432964a 449 strlcpy(fontname, options + 5, sizeof(fontname));
37773c4e
MH		 450 continue;
451 }
1da177e4
LT		 452
453 if (!strncmp(options, "scrollback:", 11)) {
454 options += 11;
455 if (*options) {
456 fbcon_softback_size = simple_strtoul(options, &options, 0);
457 if (*options == 'k' || *options == 'K') {
458 fbcon_softback_size *= 1024;
1da177e4 459 }
37773c4e
MH		 460 }
461 continue;
1da177e4
LT		 462 }
463
464 if (!strncmp(options, "map:", 4)) {
465 options += 4;
623e71b0 466 if (*options) {
1da177e4
LT		 467 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
468 if (!options[j])
469 j = 0;
470 con2fb_map_boot[i] =
471 (options[j++]-'0') % FB_MAX;
472 }
623e71b0 473
4769a9a5 474 fbcon_map_override();
623e71b0 475 }
37773c4e 476 continue;
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;
37773c4e
MH		 488 continue;
489 }
e4fc2761
AD		 490
491 if (!strncmp(options, "rotate:", 7)) {
492 options += 7;
493 if (*options)
2428e59b
MS		 494 initial_rotation = simple_strtoul(options, &options, 0);
495 if (initial_rotation > 3)
496 initial_rotation = 0;
37773c4e 497 continue;
e4fc2761 498 }
1da177e4 499 }
9b41046c 500 return 1;
1da177e4
LT		 501}
502
503__setup("fbcon=", fb_console_setup);
504#endif
505
506static int search_fb_in_map(int idx)
507{
508 int i, retval = 0;
509
e614b18d 510 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 511 if (con2fb_map[i] == idx)
512 retval = 1;
513 }
514 return retval;
515}
516
517static int search_for_mapped_con(void)
518{
519 int i, retval = 0;
520
e614b18d 521 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 522 if (con2fb_map[i] != -1)
523 retval = 1;
524 }
525 return retval;
526}
527
50e244cc
AC		 528static int do_fbcon_takeover(int show_logo)
529{
530 int err, i;
531
532 if (!num_registered_fb)
533 return -ENODEV;
534
535 if (!show_logo)
536 logo_shown = FBCON_LOGO_DONTSHOW;
537
538 for (i = first_fb_vc; i <= last_fb_vc; i++)
539 con2fb_map[i] = info_idx;
540
541 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
542 fbcon_is_default);
543
544 if (err) {
545 for (i = first_fb_vc; i <= last_fb_vc; i++)
546 con2fb_map[i] = -1;
547 info_idx = -1;
548 } else {
549 fbcon_has_console_bind = 1;
1da177e4
LT		 550 }
551
552 return err;
553}
554
70802c60
AD		 555#ifdef MODULE
556static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
557 int cols, int rows, int new_cols, int new_rows)
558{
559 logo_shown = FBCON_LOGO_DONTSHOW;
560}
561#else
1da177e4
LT		 562static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
563 int cols, int rows, int new_cols, int new_rows)
564{
565 /* Need to make room for the logo */
9c44e5f6 566 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 567 int cnt, erase = vc->vc_video_erase_char, step;
568 unsigned short *save = NULL, *r, *q;
49a1d28f 569 int logo_height;
1da177e4 570
70802c60
AD		 571 if (info->flags & FBINFO_MODULE) {
572 logo_shown = FBCON_LOGO_DONTSHOW;
573 return;
574 }
575
1da177e4
LT		 576 /*
577 * remove underline attribute from erase character
578 * if black and white framebuffer.
579 */
b8c90945 580 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 581 erase &= ~0x400;
9c44e5f6 582 logo_height = fb_prepare_logo(info, ops->rotate);
416e74ea 583 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
1da177e4
LT		 584 q = (unsigned short *) (vc->vc_origin +
585 vc->vc_size_row * rows);
586 step = logo_lines * cols;
587 for (r = q - logo_lines * cols; r < q; r++)
588 if (scr_readw(r) != vc->vc_video_erase_char)
589 break;
590 if (r != q && new_rows >= rows + logo_lines) {
591 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
592 if (save) {
593 int i = cols < new_cols ? cols : new_cols;
594 scr_memsetw(save, erase, logo_lines * new_cols * 2);
595 r = q - step;
596 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
597 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
598 r = q;
599 }
600 }
601 if (r == q) {
602 /* We can scroll screen down */
603 r = q - step - cols;
604 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
605 scr_memcpyw(r + step, r, vc->vc_size_row);
606 r -= cols;
607 }
608 if (!save) {
250038f5
GU		 609 int lines;
610 if (vc->vc_y + logo_lines >= rows)
611 lines = rows - vc->vc_y - 1;
612 else
613 lines = logo_lines;
614 vc->vc_y += lines;
615 vc->vc_pos += lines * vc->vc_size_row;
1da177e4
LT		 616 }
617 }
618 scr_memsetw((unsigned short *) vc->vc_origin,
619 erase,
620 vc->vc_size_row * logo_lines);
621
622 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
623 fbcon_clear_margins(vc, 0);
624 update_screen(vc);
625 }
626
627 if (save) {
628 q = (unsigned short *) (vc->vc_origin +
629 vc->vc_size_row *
630 rows);
631 scr_memcpyw(q, save, logo_lines * new_cols * 2);
632 vc->vc_y += logo_lines;
633 vc->vc_pos += logo_lines * vc->vc_size_row;
634 kfree(save);
635 }
636
637 if (logo_lines > vc->vc_bottom) {
638 logo_shown = FBCON_LOGO_CANSHOW;
639 printk(KERN_INFO
640 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
641 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
642 logo_shown = FBCON_LOGO_DRAW;
643 vc->vc_top = logo_lines;
644 }
645}
70802c60 646#endif /* MODULE */
1da177e4
LT		 647
648#ifdef CONFIG_FB_TILEBLITTING
b73deed3 649static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 650{
651 struct fbcon_ops *ops = info->fbcon_par;
652
b73deed3 653 ops->p = &fb_display[vc->vc_num];
ab767201 654
1da177e4 655 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 656 fbcon_set_tileops(vc, info);
e4fc2761 657 else {
b73deed3 658 fbcon_set_rotation(info);
1da177e4 659 fbcon_set_bitops(ops);
e4fc2761 660 }
1da177e4 661}
38b4982c
AD		 662
663static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
664{
665 int err = 0;
666
667 if (info->flags & FBINFO_MISC_TILEBLITTING &&
668 info->tileops->fb_get_tilemax(info) < charcount)
669 err = 1;
670
671 return err;
672}
1da177e4 673#else
b73deed3 674static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 675{
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 679 ops->p = &fb_display[vc->vc_num];
680 fbcon_set_rotation(info);
1da177e4
LT		 681 fbcon_set_bitops(ops);
682}
38b4982c
AD		 683
684static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
685{
686 return 0;
687}
688
1da177e4
LT		 689#endif /* CONFIG_MISC_TILEBLITTING */
690
691
692static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
693 int unit, int oldidx)
694{
695 struct fbcon_ops *ops = NULL;
696 int err = 0;
697
698 if (!try_module_get(info->fbops->owner))
699 err = -ENODEV;
700
701 if (!err && info->fbops->fb_open &&
702 info->fbops->fb_open(info, 0))
703 err = -ENODEV;
704
705 if (!err) {
a39bc34e 706 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 707 if (!ops)
708 err = -ENOMEM;
709 }
710
711 if (!err) {
1da177e4 712 info->fbcon_par = ops;
d1baa4ff
AD		 713
714 if (vc)
715 set_blitting_type(vc, info);
1da177e4
LT		 716 }
717
718 if (err) {
719 con2fb_map[unit] = oldidx;
720 module_put(info->fbops->owner);
721 }
722
723 return err;
724}
725
726static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
727 struct fb_info *newinfo, int unit,
728 int oldidx, int found)
729{
730 struct fbcon_ops *ops = oldinfo->fbcon_par;
0fcf6ada 731 int err = 0, ret;
1da177e4
LT		 732
733 if (oldinfo->fbops->fb_release &&
734 oldinfo->fbops->fb_release(oldinfo, 0)) {
735 con2fb_map[unit] = oldidx;
736 if (!found && newinfo->fbops->fb_release)
737 newinfo->fbops->fb_release(newinfo, 0);
738 if (!found)
739 module_put(newinfo->fbops->owner);
740 err = -ENODEV;
741 }
742
743 if (!err) {
88fb2c6e 744 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 745 kfree(ops->cursor_state.mask);
746 kfree(ops->cursor_data);
7a966fbd 747 kfree(ops->cursor_src);
e4fc2761 748 kfree(ops->fontbuffer);
1da177e4
LT		 749 kfree(oldinfo->fbcon_par);
750 oldinfo->fbcon_par = NULL;
751 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 752 /*
753 If oldinfo and newinfo are driving the same hardware,
754 the fb_release() method of oldinfo may attempt to
755 restore the hardware state. This will leave the
756 newinfo in an undefined state. Thus, a call to
757 fb_set_par() may be needed for the newinfo.
758 */
5f4dc28b 759 if (newinfo && newinfo->fbops->fb_set_par) {
0fcf6ada
FTS		 760 ret = newinfo->fbops->fb_set_par(newinfo);
761
762 if (ret)
763 printk(KERN_ERR "con2fb_release_oldinfo: "
764 "detected unhandled fb_set_par error, "
765 "error code %d\n", ret);
766 }
1da177e4
LT		 767 }
768
769 return err;
770}
771
1da177e4
LT		 772static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
773 int unit, int show_logo)
774{
775 struct fbcon_ops *ops = info->fbcon_par;
0fcf6ada 776 int ret;
1da177e4
LT		 777
778 ops->currcon = fg_console;
779
0fcf6ada
FTS		 780 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
781 ret = info->fbops->fb_set_par(info);
782
783 if (ret)
784 printk(KERN_ERR "con2fb_init_display: detected "
785 "unhandled fb_set_par error, "
786 "error code %d\n", ret);
787 }
1da177e4
LT		 788
789 ops->flags |= FBCON_FLAGS_INIT;
790 ops->graphics = 0;
d1baa4ff 791 fbcon_set_disp(info, &info->var, unit);
1da177e4
LT		 792
793 if (show_logo) {
794 struct vc_data *fg_vc = vc_cons[fg_console].d;
795 struct fb_info *fg_info =
796 registered_fb[con2fb_map[fg_console]];
797
798 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
799 fg_vc->vc_rows, fg_vc->vc_cols,
800 fg_vc->vc_rows);
801 }
802
803 update_screen(vc_cons[fg_console].d);
804}
805
806/**
807 * set_con2fb_map - map console to frame buffer device
808 * @unit: virtual console number to map
809 * @newidx: frame buffer index to map virtual console to
810 * @user: user request
811 *
812 * Maps a virtual console @unit to a frame buffer device
813 * @newidx.
054430e7
DA		 814 *
815 * This should be called with the console lock held.
1da177e4
LT		 816 */
817static int set_con2fb_map(int unit, int newidx, int user)
818{
819 struct vc_data *vc = vc_cons[unit].d;
820 int oldidx = con2fb_map[unit];
821 struct fb_info *info = registered_fb[newidx];
822 struct fb_info *oldinfo = NULL;
823 int found, err = 0;
824
825 if (oldidx == newidx)
826 return 0;
827
32b98bf8 828 if (!info)
e614b18d 829 return -EINVAL;
1da177e4 830
32b98bf8 831 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
1da177e4 832 info_idx = newidx;
054430e7 833 return do_fbcon_takeover(0);
1da177e4
LT		 834 }
835
836 if (oldidx != -1)
837 oldinfo = registered_fb[oldidx];
838
839 found = search_fb_in_map(newidx);
840
1da177e4
LT		 841 con2fb_map[unit] = newidx;
842 if (!err && !found)
843 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
844
845
846 /*
847 * If old fb is not mapped to any of the consoles,
848 * fbcon should release it.
849 */
850 if (!err && oldinfo && !search_fb_in_map(oldidx))
851 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
852 found);
853
854 if (!err) {
855 int show_logo = (fg_console == 0 && !user &&
856 logo_shown != FBCON_LOGO_DONTSHOW);
857
858 if (!found)
88fb2c6e 859 fbcon_add_cursor_timer(info);
1da177e4
LT		 860 con2fb_map_boot[unit] = newidx;
861 con2fb_init_display(vc, info, unit, show_logo);
862 }
863
e614b18d
AD		 864 if (!search_fb_in_map(info_idx))
865 info_idx = newidx;
866
1da177e4
LT		 867 return err;
868}
869
870/*
871 * Low Level Operations
872 */
155957f5 873/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
1da177e4
LT		 874static int var_to_display(struct display *disp,
875 struct fb_var_screeninfo *var,
876 struct fb_info *info)
877{
878 disp->xres_virtual = var->xres_virtual;
879 disp->yres_virtual = var->yres_virtual;
880 disp->bits_per_pixel = var->bits_per_pixel;
881 disp->grayscale = var->grayscale;
882 disp->nonstd = var->nonstd;
883 disp->accel_flags = var->accel_flags;
884 disp->height = var->height;
885 disp->width = var->width;
886 disp->red = var->red;
887 disp->green = var->green;
888 disp->blue = var->blue;
889 disp->transp = var->transp;
890 disp->rotate = var->rotate;
891 disp->mode = fb_match_mode(var, &info->modelist);
892 if (disp->mode == NULL)
893 /* This should not happen */
894 return -EINVAL;
895 return 0;
896}
897
898static void display_to_var(struct fb_var_screeninfo *var,
899 struct display *disp)
900{
901 fb_videomode_to_var(var, disp->mode);
902 var->xres_virtual = disp->xres_virtual;
903 var->yres_virtual = disp->yres_virtual;
904 var->bits_per_pixel = disp->bits_per_pixel;
905 var->grayscale = disp->grayscale;
906 var->nonstd = disp->nonstd;
907 var->accel_flags = disp->accel_flags;
908 var->height = disp->height;
909 var->width = disp->width;
910 var->red = disp->red;
911 var->green = disp->green;
912 var->blue = disp->blue;
913 var->transp = disp->transp;
914 var->rotate = disp->rotate;
915}
916
917static const char *fbcon_startup(void)
918{
919 const char *display_desc = "frame buffer device";
920 struct display *p = &fb_display[fg_console];
921 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 922 const struct font_desc *font = NULL;
1da177e4
LT		 923 struct module *owner;
924 struct fb_info *info = NULL;
925 struct fbcon_ops *ops;
926 int rows, cols;
1da177e4 927
1da177e4
LT		 928 /*
929 * If num_registered_fb is zero, this is a call for the dummy part.
930 * The frame buffer devices weren't initialized yet.
931 */
932 if (!num_registered_fb || info_idx == -1)
933 return display_desc;
934 /*
935 * Instead of blindly using registered_fb[0], we use info_idx, set by
936 * fb_console_init();
937 */
938 info = registered_fb[info_idx];
939 if (!info)
940 return NULL;
941
942 owner = info->fbops->owner;
943 if (!try_module_get(owner))
944 return NULL;
945 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
946 module_put(owner);
947 return NULL;
948 }
949
a39bc34e 950 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 951 if (!ops) {
952 module_put(owner);
953 return NULL;
954 }
955
1da177e4
LT		 956 ops->currcon = -1;
957 ops->graphics = 1;
e4fc2761 958 ops->cur_rotate = -1;
1da177e4 959 info->fbcon_par = ops;
2428e59b 960 p->con_rotate = initial_rotation;
b73deed3 961 set_blitting_type(vc, info);
1da177e4
LT		 962
963 if (info->fix.type != FB_TYPE_TEXT) {
964 if (fbcon_softback_size) {
965 if (!softback_buf) {
966 softback_buf =
967 (unsigned long)
968 kmalloc(fbcon_softback_size,
969 GFP_KERNEL);
970 if (!softback_buf) {
971 fbcon_softback_size = 0;
972 softback_top = 0;
973 }
974 }
975 } else {
976 if (softback_buf) {
977 kfree((void *) softback_buf);
978 softback_buf = 0;
979 softback_top = 0;
980 }
981 }
982 if (softback_buf)
983 softback_in = softback_top = softback_curr =
984 softback_buf;
985 softback_lines = 0;
986 }
987
988 /* Setup default font */
ae128786 989 if (!p->fontdata && !vc->vc_font.data) {
1da177e4
LT		 990 if (!fontname[0] || !(font = find_font(fontname)))
991 font = get_default_font(info->var.xres,
2d2699d9
AD		 992 info->var.yres,
993 info->pixmap.blit_x,
994 info->pixmap.blit_y);
1da177e4
LT		 995 vc->vc_font.width = font->width;
996 vc->vc_font.height = font->height;
2f4516db 997 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4 998 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
ae128786
DA		 999 } else {
1000 p->fontdata = vc->vc_font.data;
1da177e4
LT		 1001 }
1002
e4fc2761
AD		 1003 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1004 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1005 cols /= vc->vc_font.width;
1006 rows /= vc->vc_font.height;
1da177e4
LT		 1007 vc_resize(vc, cols, rows);
1008
1009 DPRINTK("mode: %s\n", info->fix.id);
1010 DPRINTK("visual: %d\n", info->fix.visual);
1011 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1012 info->var.yres,
1013 info->var.bits_per_pixel);
1014
88fb2c6e 1015 fbcon_add_cursor_timer(info);
e614b18d 1016 fbcon_has_exited = 0;
1da177e4
LT		 1017 return display_desc;
1018}
1019
1020static void fbcon_init(struct vc_data *vc, int init)
1021{
1022 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1023 struct fbcon_ops *ops;
1024 struct vc_data **default_mode = vc->vc_display_fg;
1025 struct vc_data *svc = *default_mode;
1026 struct display *t, *p = &fb_display[vc->vc_num];
1027 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
0fcf6ada 1028 int cap, ret;
1da177e4
LT		 1029
1030 if (info_idx == -1 || info == NULL)
1031 return;
306958e8
AB		 1032
1033 cap = info->flags;
1034
1da177e4
LT		 1035 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1036 (info->fix.type == FB_TYPE_TEXT))
1037 logo = 0;
1038
1da177e4
LT		 1039 if (var_to_display(p, &info->var, info))
1040 return;
1041
d1baa4ff
AD		 1042 if (!info->fbcon_par)
1043 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1044
1da177e4
LT		 1045 /* If we are not the first console on this
1046 fb, copy the font from that console */
e614b18d
AD		 1047 t = &fb_display[fg_console];
1048 if (!p->fontdata) {
1049 if (t->fontdata) {
1050 struct vc_data *fvc = vc_cons[fg_console].d;
1051
1052 vc->vc_font.data = (void *)(p->fontdata =
1053 fvc->vc_font.data);
1054 vc->vc_font.width = fvc->vc_font.width;
1055 vc->vc_font.height = fvc->vc_font.height;
1056 p->userfont = t->userfont;
1057
1058 if (p->userfont)
1059 REFCOUNT(p->fontdata)++;
1060 } else {
1061 const struct font_desc *font = NULL;
1062
1063 if (!fontname[0] || !(font = find_font(fontname)))
1064 font = get_default_font(info->var.xres,
2d2699d9
AD		 1065 info->var.yres,
1066 info->pixmap.blit_x,
1067 info->pixmap.blit_y);
e614b18d
AD		 1068 vc->vc_font.width = font->width;
1069 vc->vc_font.height = font->height;
1070 vc->vc_font.data = (void *)(p->fontdata = font->data);
1071 vc->vc_font.charcount = 256; /* FIXME Need to
1072 support more fonts */
1073 }
1da177e4 1074 }
e614b18d 1075
1da177e4
LT		 1076 if (p->userfont)
1077 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1078
8fd4bd22 1079 vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
b8c90945 1080 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1081 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1082 if (charcnt == 256) {
1083 vc->vc_hi_font_mask = 0;
1084 } else {
1085 vc->vc_hi_font_mask = 0x100;
1086 if (vc->vc_can_do_color)
1087 vc->vc_complement_mask <<= 1;
1088 }
1089
1090 if (!*svc->vc_uni_pagedir_loc)
1091 con_set_default_unimap(svc);
1092 if (!*vc->vc_uni_pagedir_loc)
1093 con_copy_unimap(vc, svc);
1094
e4fc2761 1095 ops = info->fbcon_par;
2428e59b 1096 p->con_rotate = initial_rotation;
b73deed3 1097 set_blitting_type(vc, info);
e4fc2761 1098
1da177e4
LT		 1099 cols = vc->vc_cols;
1100 rows = vc->vc_rows;
e4fc2761
AD		 1101 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1102 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1103 new_cols /= vc->vc_font.width;
1104 new_rows /= vc->vc_font.height;
1da177e4 1105
1da177e4
LT		 1106 /*
1107 * We must always set the mode. The mode of the previous console
1108 * driver could be in the same resolution but we are using different
1109 * hardware so we have to initialize the hardware.
1110 *
1111 * We need to do it in fbcon_init() to prevent screen corruption.
1112 */
d354d9af 1113 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4 1114 if (info->fbops->fb_set_par &&
0fcf6ada
FTS		 1115 !(ops->flags & FBCON_FLAGS_INIT)) {
1116 ret = info->fbops->fb_set_par(info);
1117
1118 if (ret)
1119 printk(KERN_ERR "fbcon_init: detected "
1120 "unhandled fb_set_par error, "
1121 "error code %d\n", ret);
1122 }
1123
1da177e4
LT		 1124 ops->flags |= FBCON_FLAGS_INIT;
1125 }
1126
1127 ops->graphics = 0;
1128
1129 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1130 !(cap & FBINFO_HWACCEL_DISABLED))
1131 p->scrollmode = SCROLL_MOVE;
1132 else /* default to something safe */
1133 p->scrollmode = SCROLL_REDRAW;
1134
1135 /*
1136 * ++guenther: console.c:vc_allocate() relies on initializing
1137 * vc_{cols,rows}, but we must not set those if we are only
1138 * resizing the console.
1139 */
0035fe00 1140 if (init) {
1da177e4
LT		 1141 vc->vc_cols = new_cols;
1142 vc->vc_rows = new_rows;
0035fe00
JW		 1143 } else
1144 vc_resize(vc, new_cols, new_rows);
1da177e4
LT		 1145
1146 if (logo)
1147 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1148
4d9c5b6e
AD		 1149 if (vc == svc && softback_buf)
1150 fbcon_update_softback(vc);
e4fc2761 1151
b73deed3 1152 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1153 ops->rotate = FB_ROTATE_UR;
b73deed3 1154 set_blitting_type(vc, info);
e4fc2761
AD		 1155 }
1156
1a37d5f5 1157 ops->p = &fb_display[fg_console];
1da177e4
LT		 1158}
1159
ae128786 1160static void fbcon_free_font(struct display *p, bool freefont)
e614b18d 1161{
ae128786 1162 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
e614b18d
AD		 1163 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1164 p->fontdata = NULL;
1165 p->userfont = 0;
1166}
1167
1da177e4
LT		 1168static void fbcon_deinit(struct vc_data *vc)
1169{
1170 struct display *p = &fb_display[vc->vc_num];
e614b18d
AD		 1171 struct fb_info *info;
1172 struct fbcon_ops *ops;
1173 int idx;
ae128786 1174 bool free_font = true;
1da177e4 1175
e614b18d
AD		 1176 idx = con2fb_map[vc->vc_num];
1177
1178 if (idx == -1)
1179 goto finished;
1180
1181 info = registered_fb[idx];
1182
1183 if (!info)
1184 goto finished;
1185
ae128786
DA		 1186 if (info->flags & FBINFO_MISC_FIRMWARE)
1187 free_font = false;
e614b18d
AD		 1188 ops = info->fbcon_par;
1189
1190 if (!ops)
1191 goto finished;
1192
1193 if (CON_IS_VISIBLE(vc))
1194 fbcon_del_cursor_timer(info);
1195
1196 ops->flags &= ~FBCON_FLAGS_INIT;
1197finished:
1198
ae128786 1199 fbcon_free_font(p, free_font);
e6637d54
MK		 1200 if (free_font)
1201 vc->vc_font.data = NULL;
ae128786 1202
e614b18d
AD		 1203 if (!con_is_bound(&fb_con))
1204 fbcon_exit();
1205
1206 return;
1da177e4
LT		 1207}
1208
1209/* ====================================================================== */
1210
1211/* fbcon_XXX routines - interface used by the world
1212 *
1213 * This system is now divided into two levels because of complications
1214 * caused by hardware scrolling. Top level functions:
1215 *
1216 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1217 *
1218 * handles y values in range [0, scr_height-1] that correspond to real
1219 * screen positions. y_wrap shift means that first line of bitmap may be
1220 * anywhere on this display. These functions convert lineoffsets to
1221 * bitmap offsets and deal with the wrap-around case by splitting blits.
1222 *
1223 * fbcon_bmove_physical_8() -- These functions fast implementations
1224 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1225 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1226 *
1227 * WARNING:
1228 *
1229 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1230 * Implies should only really hardware scroll in rows. Only reason for
1231 * restriction is simplicity & efficiency at the moment.
1232 */
1233
1da177e4
LT		 1234static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1235 int width)
1236{
1237 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1238 struct fbcon_ops *ops = info->fbcon_par;
1239
1240 struct display *p = &fb_display[vc->vc_num];
1241 u_int y_break;
1242
1243 if (fbcon_is_inactive(vc, info))
1244 return;
1245
1246 if (!height || !width)
1247 return;
1248
256fc0e5 1249 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
c213ddf3 1250 vc->vc_top = 0;
256fc0e5
KM		 1251 /*
1252 * If the font dimensions are not an integral of the display
1253 * dimensions then the ops->clear below won't end up clearing
1254 * the margins. Call clear_margins here in case the logo
1255 * bitmap stretched into the margin area.
1256 */
1257 fbcon_clear_margins(vc, 0);
1258 }
c213ddf3 1259
1da177e4
LT		 1260 /* Split blits that cross physical y_wrap boundary */
1261
1262 y_break = p->vrows - p->yscroll;
1263 if (sy < y_break && sy + height - 1 >= y_break) {
1264 u_int b = y_break - sy;
1265 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267 width);
1268 } else
1269 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270}
1271
1272static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273 int count, int ypos, int xpos)
1274{
1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276 struct display *p = &fb_display[vc->vc_num];
1277 struct fbcon_ops *ops = info->fbcon_par;
1278
1279 if (!fbcon_is_inactive(vc, info))
1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281 get_color(vc, info, scr_readw(s), 1),
1282 get_color(vc, info, scr_readw(s), 0));
1283}
1284
1285static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286{
1287 unsigned short chr;
1288
1289 scr_writew(c, &chr);
1290 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291}
1292
1293static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294{
1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->clear_margins(vc, info, bottom_only);
1300}
1301
1302static void fbcon_cursor(struct vc_data *vc, int mode)
1303{
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1306 int y;
1307 int c = scr_readw((u16 *) vc->vc_pos);
1308
d1e23066 1309 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1da177e4
LT		 1310 return;
1311
27a4c827 1312 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
a5edce42
TR		 1313 if (vc->vc_cursor_type & 0x10)
1314 fbcon_del_cursor_timer(info);
1315 else
acba9cd0
AD		 1316 fbcon_add_cursor_timer(info);
1317
1da177e4
LT		 1318 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1319 if (mode & CM_SOFTBACK) {
1320 mode &= ~CM_SOFTBACK;
1321 y = softback_lines;
1322 } else {
1323 if (softback_lines)
1324 fbcon_set_origin(vc);
1325 y = 0;
1326 }
1327
b73deed3 1328 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4 1329 get_color(vc, info, c, 0));
1da177e4
LT		 1330}
1331
1332static int scrollback_phys_max = 0;
1333static int scrollback_max = 0;
1334static int scrollback_current = 0;
1335
1da177e4 1336static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
d1baa4ff 1337 int unit)
1da177e4 1338{
d1baa4ff
AD		 1339 struct display *p, *t;
1340 struct vc_data **default_mode, *vc;
1341 struct vc_data *svc;
e4fc2761 1342 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1343 int rows, cols, charcnt = 256;
1344
d1baa4ff
AD		 1345 p = &fb_display[unit];
1346
1da177e4
LT		 1347 if (var_to_display(p, var, info))
1348 return;
d1baa4ff
AD		 1349
1350 vc = vc_cons[unit].d;
1351
1352 if (!vc)
1353 return;
1354
1355 default_mode = vc->vc_display_fg;
1356 svc = *default_mode;
1da177e4 1357 t = &fb_display[svc->vc_num];
d1baa4ff 1358
1da177e4 1359 if (!vc->vc_font.data) {
2f4516db 1360 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1361 vc->vc_font.width = (*default_mode)->vc_font.width;
1362 vc->vc_font.height = (*default_mode)->vc_font.height;
1363 p->userfont = t->userfont;
1364 if (p->userfont)
1365 REFCOUNT(p->fontdata)++;
1366 }
1367 if (p->userfont)
1368 charcnt = FNTCHARCNT(p->fontdata);
1369
b8c90945
AD		 1370 var->activate = FB_ACTIVATE_NOW;
1371 info->var.activate = var->activate;
e4fc2761
AD		 1372 var->yoffset = info->var.yoffset;
1373 var->xoffset = info->var.xoffset;
b8c90945 1374 fb_set_var(info, var);
e4fc2761 1375 ops->var = info->var;
b8c90945 1376 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1377 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1378 if (charcnt == 256) {
1379 vc->vc_hi_font_mask = 0;
1380 } else {
1381 vc->vc_hi_font_mask = 0x100;
1382 if (vc->vc_can_do_color)
1383 vc->vc_complement_mask <<= 1;
1384 }
1385
1386 if (!*svc->vc_uni_pagedir_loc)
1387 con_set_default_unimap(svc);
1388 if (!*vc->vc_uni_pagedir_loc)
1389 con_copy_unimap(vc, svc);
1390
e4fc2761
AD		 1391 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1392 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1393 cols /= vc->vc_font.width;
1394 rows /= vc->vc_font.height;
1da177e4 1395 vc_resize(vc, cols, rows);
e4fc2761 1396
1da177e4
LT		 1397 if (CON_IS_VISIBLE(vc)) {
1398 update_screen(vc);
4d9c5b6e
AD		 1399 if (softback_buf)
1400 fbcon_update_softback(vc);
1da177e4
LT		 1401 }
1402}
1403
1404static __inline__ void ywrap_up(struct vc_data *vc, int count)
1405{
1406 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1407 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1408 struct display *p = &fb_display[vc->vc_num];
1409
1410 p->yscroll += count;
1411 if (p->yscroll >= p->vrows) /* Deal with wrap */
1412 p->yscroll -= p->vrows;
e4fc2761
AD		 1413 ops->var.xoffset = 0;
1414 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1415 ops->var.vmode |= FB_VMODE_YWRAP;
1416 ops->update_start(info);
1da177e4
LT		 1417 scrollback_max += count;
1418 if (scrollback_max > scrollback_phys_max)
1419 scrollback_max = scrollback_phys_max;
1420 scrollback_current = 0;
1421}
1422
1423static __inline__ void ywrap_down(struct vc_data *vc, int count)
1424{
1425 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1426 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1427 struct display *p = &fb_display[vc->vc_num];
1428
1429 p->yscroll -= count;
1430 if (p->yscroll < 0) /* Deal with wrap */
1431 p->yscroll += p->vrows;
e4fc2761
AD		 1432 ops->var.xoffset = 0;
1433 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1434 ops->var.vmode |= FB_VMODE_YWRAP;
1435 ops->update_start(info);
1da177e4
LT		 1436 scrollback_max -= count;
1437 if (scrollback_max < 0)
1438 scrollback_max = 0;
1439 scrollback_current = 0;
1440}
1441
1442static __inline__ void ypan_up(struct vc_data *vc, int count)
1443{
1444 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1445 struct display *p = &fb_display[vc->vc_num];
1446 struct fbcon_ops *ops = info->fbcon_par;
1447
1448 p->yscroll += count;
1449 if (p->yscroll > p->vrows - vc->vc_rows) {
1450 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1451 0, 0, 0, vc->vc_rows, vc->vc_cols);
1452 p->yscroll -= p->vrows - vc->vc_rows;
1453 }
e4fc2761
AD		 1454
1455 ops->var.xoffset = 0;
1456 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1457 ops->var.vmode &= ~FB_VMODE_YWRAP;
1458 ops->update_start(info);
1da177e4
LT		 1459 fbcon_clear_margins(vc, 1);
1460 scrollback_max += count;
1461 if (scrollback_max > scrollback_phys_max)
1462 scrollback_max = scrollback_phys_max;
1463 scrollback_current = 0;
1464}
1465
1466static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1467{
1468 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1469 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1470 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1471
1472 p->yscroll += count;
a39bc34e 1473
1da177e4
LT		 1474 if (p->yscroll > p->vrows - vc->vc_rows) {
1475 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1476 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1477 }
e4fc2761
AD		 1478
1479 ops->var.xoffset = 0;
1480 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1481 ops->var.vmode &= ~FB_VMODE_YWRAP;
1482 ops->update_start(info);
1da177e4
LT		 1483 fbcon_clear_margins(vc, 1);
1484 scrollback_max += count;
1485 if (scrollback_max > scrollback_phys_max)
1486 scrollback_max = scrollback_phys_max;
1487 scrollback_current = 0;
1488}
1489
1490static __inline__ void ypan_down(struct vc_data *vc, int count)
1491{
1492 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1493 struct display *p = &fb_display[vc->vc_num];
1494 struct fbcon_ops *ops = info->fbcon_par;
1495
1496 p->yscroll -= count;
1497 if (p->yscroll < 0) {
1498 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1499 0, vc->vc_rows, vc->vc_cols);
1500 p->yscroll += p->vrows - vc->vc_rows;
1501 }
e4fc2761
AD		 1502
1503 ops->var.xoffset = 0;
1504 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1505 ops->var.vmode &= ~FB_VMODE_YWRAP;
1506 ops->update_start(info);
1da177e4
LT		 1507 fbcon_clear_margins(vc, 1);
1508 scrollback_max -= count;
1509 if (scrollback_max < 0)
1510 scrollback_max = 0;
1511 scrollback_current = 0;
1512}
1513
1514static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1515{
1516 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1517 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1518 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1519
1520 p->yscroll -= count;
a39bc34e 1521
1da177e4
LT		 1522 if (p->yscroll < 0) {
1523 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1524 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1525 }
e4fc2761
AD		 1526
1527 ops->var.xoffset = 0;
1528 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1529 ops->var.vmode &= ~FB_VMODE_YWRAP;
1530 ops->update_start(info);
1da177e4
LT		 1531 fbcon_clear_margins(vc, 1);
1532 scrollback_max -= count;
1533 if (scrollback_max < 0)
1534 scrollback_max = 0;
1535 scrollback_current = 0;
1536}
1537
1538static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1539 long delta)
1540{
1541 int count = vc->vc_rows;
1542 unsigned short *d, *s;
1543 unsigned long n;
1544 int line = 0;
1545
1546 d = (u16 *) softback_curr;
1547 if (d == (u16 *) softback_in)
1548 d = (u16 *) vc->vc_origin;
1549 n = softback_curr + delta * vc->vc_size_row;
1550 softback_lines -= delta;
1551 if (delta < 0) {
1552 if (softback_curr < softback_top && n < softback_buf) {
1553 n += softback_end - softback_buf;
1554 if (n < softback_top) {
1555 softback_lines -=
1556 (softback_top - n) / vc->vc_size_row;
1557 n = softback_top;
1558 }
1559 } else if (softback_curr >= softback_top
1560 && n < softback_top) {
1561 softback_lines -=
1562 (softback_top - n) / vc->vc_size_row;
1563 n = softback_top;
1564 }
1565 } else {
1566 if (softback_curr > softback_in && n >= softback_end) {
1567 n += softback_buf - softback_end;
1568 if (n > softback_in) {
1569 n = softback_in;
1570 softback_lines = 0;
1571 }
1572 } else if (softback_curr <= softback_in && n > softback_in) {
1573 n = softback_in;
1574 softback_lines = 0;
1575 }
1576 }
1577 if (n == softback_curr)
1578 return;
1579 softback_curr = n;
1580 s = (u16 *) softback_curr;
1581 if (s == (u16 *) softback_in)
1582 s = (u16 *) vc->vc_origin;
1583 while (count--) {
1584 unsigned short *start;
1585 unsigned short *le;
1586 unsigned short c;
1587 int x = 0;
1588 unsigned short attr = 1;
1589
1590 start = s;
1591 le = advance_row(s, 1);
1592 do {
1593 c = scr_readw(s);
1594 if (attr != (c & 0xff00)) {
1595 attr = c & 0xff00;
1596 if (s > start) {
1597 fbcon_putcs(vc, start, s - start,
1598 line, x);
1599 x += s - start;
1600 start = s;
1601 }
1602 }
1603 if (c == scr_readw(d)) {
1604 if (s > start) {
1605 fbcon_putcs(vc, start, s - start,
1606 line, x);
1607 x += s - start + 1;
1608 start = s + 1;
1609 } else {
1610 x++;
1611 start++;
1612 }
1613 }
1614 s++;
1615 d++;
1616 } while (s < le);
1617 if (s > start)
1618 fbcon_putcs(vc, start, s - start, line, x);
1619 line++;
1620 if (d == (u16 *) softback_end)
1621 d = (u16 *) softback_buf;
1622 if (d == (u16 *) softback_in)
1623 d = (u16 *) vc->vc_origin;
1624 if (s == (u16 *) softback_end)
1625 s = (u16 *) softback_buf;
1626 if (s == (u16 *) softback_in)
1627 s = (u16 *) vc->vc_origin;
1628 }
1629}
1630
1631static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1632 int line, int count, int dy)
1633{
1634 unsigned short *s = (unsigned short *)
1635 (vc->vc_origin + vc->vc_size_row * line);
1636
1637 while (count--) {
1638 unsigned short *start = s;
1639 unsigned short *le = advance_row(s, 1);
1640 unsigned short c;
1641 int x = 0;
1642 unsigned short attr = 1;
1643
1644 do {
1645 c = scr_readw(s);
1646 if (attr != (c & 0xff00)) {
1647 attr = c & 0xff00;
1648 if (s > start) {
1649 fbcon_putcs(vc, start, s - start,
1650 dy, x);
1651 x += s - start;
1652 start = s;
1653 }
1654 }
1655 console_conditional_schedule();
1656 s++;
1657 } while (s < le);
1658 if (s > start)
1659 fbcon_putcs(vc, start, s - start, dy, x);
1660 console_conditional_schedule();
1661 dy++;
1662 }
1663}
1664
bad07ff7
KH		 1665static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1666 struct display *p, int line, int count, int ycount)
1667{
1668 int offset = ycount * vc->vc_cols;
1669 unsigned short *d = (unsigned short *)
1670 (vc->vc_origin + vc->vc_size_row * line);
1671 unsigned short *s = d + offset;
1672 struct fbcon_ops *ops = info->fbcon_par;
1673
1674 while (count--) {
1675 unsigned short *start = s;
1676 unsigned short *le = advance_row(s, 1);
1677 unsigned short c;
1678 int x = 0;
1679
1680 do {
1681 c = scr_readw(s);
1682
1683 if (c == scr_readw(d)) {
1684 if (s > start) {
1685 ops->bmove(vc, info, line + ycount, x,
1686 line, x, 1, s-start);
1687 x += s - start + 1;
1688 start = s + 1;
1689 } else {
1690 x++;
1691 start++;
1692 }
1693 }
1694
1695 scr_writew(c, d);
1696 console_conditional_schedule();
1697 s++;
1698 d++;
1699 } while (s < le);
1700 if (s > start)
1701 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1702 s-start);
1703 console_conditional_schedule();
1704 if (ycount > 0)
1705 line++;
1706 else {
1707 line--;
1708 /* NOTE: We subtract two lines from these pointers */
1709 s -= vc->vc_size_row;
1710 d -= vc->vc_size_row;
1711 }
1712 }
1713}
1714
1da177e4
LT		 1715static void fbcon_redraw(struct vc_data *vc, struct display *p,
1716 int line, int count, int offset)
1717{
1718 unsigned short *d = (unsigned short *)
1719 (vc->vc_origin + vc->vc_size_row * line);
1720 unsigned short *s = d + offset;
1721
1722 while (count--) {
1723 unsigned short *start = s;
1724 unsigned short *le = advance_row(s, 1);
1725 unsigned short c;
1726 int x = 0;
1727 unsigned short attr = 1;
1728
1729 do {
1730 c = scr_readw(s);
1731 if (attr != (c & 0xff00)) {
1732 attr = c & 0xff00;
1733 if (s > start) {
1734 fbcon_putcs(vc, start, s - start,
1735 line, x);
1736 x += s - start;
1737 start = s;
1738 }
1739 }
1740 if (c == scr_readw(d)) {
1741 if (s > start) {
1742 fbcon_putcs(vc, start, s - start,
1743 line, x);
1744 x += s - start + 1;
1745 start = s + 1;
1746 } else {
1747 x++;
1748 start++;
1749 }
1750 }
1751 scr_writew(c, d);
1752 console_conditional_schedule();
1753 s++;
1754 d++;
1755 } while (s < le);
1756 if (s > start)
1757 fbcon_putcs(vc, start, s - start, line, x);
1758 console_conditional_schedule();
1759 if (offset > 0)
1760 line++;
1761 else {
1762 line--;
1763 /* NOTE: We subtract two lines from these pointers */
1764 s -= vc->vc_size_row;
1765 d -= vc->vc_size_row;
1766 }
1767 }
1768}
1769
1770static inline void fbcon_softback_note(struct vc_data *vc, int t,
1771 int count)
1772{
1773 unsigned short *p;
1774
1775 if (vc->vc_num != fg_console)
1776 return;
1777 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1778
1779 while (count) {
1780 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1781 count--;
1782 p = advance_row(p, 1);
1783 softback_in += vc->vc_size_row;
1784 if (softback_in == softback_end)
1785 softback_in = softback_buf;
1786 if (softback_in == softback_top) {
1787 softback_top += vc->vc_size_row;
1788 if (softback_top == softback_end)
1789 softback_top = softback_buf;
1790 }
1791 }
1792 softback_curr = softback_in;
1793}
1794
1795static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1796 int count)
1797{
1798 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1799 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1800 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1801
1802 if (fbcon_is_inactive(vc, info))
1803 return -EINVAL;
1804
1805 fbcon_cursor(vc, CM_ERASE);
1806
1807 /*
1808 * ++Geert: Only use ywrap/ypan if the console is in text mode
1809 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1810 * whole screen (prevents flicker).
1811 */
1812
1813 switch (dir) {
1814 case SM_UP:
1815 if (count > vc->vc_rows) /* Maximum realistic size */
1816 count = vc->vc_rows;
1817 if (softback_top)
1818 fbcon_softback_note(vc, t, count);
1819 if (logo_shown >= 0)
1820 goto redraw_up;
1821 switch (p->scrollmode) {
1822 case SCROLL_MOVE:
bad07ff7
KH		 1823 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1824 count);
1825 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1826 scr_memsetw((unsigned short *) (vc->vc_origin +
1827 vc->vc_size_row *
1828 (b - count)),
93f78da4 1829 vc->vc_video_erase_char,
bad07ff7 1830 vc->vc_size_row * count);
93f78da4 1831 return 1;
1da177e4
LT		 1832 break;
1833
1834 case SCROLL_WRAP_MOVE:
1835 if (b - t - count > 3 * vc->vc_rows >> 2) {
1836 if (t > 0)
1837 fbcon_bmove(vc, 0, 0, count, 0, t,
1838 vc->vc_cols);
1839 ywrap_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_PAN_REDRAW:
1853 if ((p->yscroll + count <=
1854 2 * (p->vrows - vc->vc_rows))
1855 && ((!scroll_partial && (b - t == vc->vc_rows))
1856 || (scroll_partial
1857 && (b - t - count >
1858 3 * vc->vc_rows >> 2)))) {
1859 if (t > 0)
1860 fbcon_redraw_move(vc, p, 0, t, count);
1861 ypan_up_redraw(vc, t, count);
1862 if (vc->vc_rows - b > 0)
26e780e8 1863 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1864 vc->vc_rows - b, b);
1865 } else
1866 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1867 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1868 break;
1869
1870 case SCROLL_PAN_MOVE:
1871 if ((p->yscroll + count <=
1872 2 * (p->vrows - vc->vc_rows))
1873 && ((!scroll_partial && (b - t == vc->vc_rows))
1874 || (scroll_partial
1875 && (b - t - count >
1876 3 * vc->vc_rows >> 2)))) {
1877 if (t > 0)
1878 fbcon_bmove(vc, 0, 0, count, 0, t,
1879 vc->vc_cols);
1880 ypan_up(vc, count);
1881 if (vc->vc_rows - b > 0)
1882 fbcon_bmove(vc, b - count, 0, b, 0,
1883 vc->vc_rows - b,
1884 vc->vc_cols);
1885 } else if (info->flags & FBINFO_READS_FAST)
1886 fbcon_bmove(vc, t + count, 0, t, 0,
1887 b - t - count, vc->vc_cols);
1888 else
1889 goto redraw_up;
1890 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1891 break;
1892
1893 case SCROLL_REDRAW:
1894 redraw_up:
1895 fbcon_redraw(vc, p, t, b - t - count,
1896 count * vc->vc_cols);
1897 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1898 scr_memsetw((unsigned short *) (vc->vc_origin +
1899 vc->vc_size_row *
1900 (b - count)),
93f78da4 1901 vc->vc_video_erase_char,
1da177e4 1902 vc->vc_size_row * count);
93f78da4 1903 return 1;
1da177e4
LT		 1904 }
1905 break;
1906
1907 case SM_DOWN:
1908 if (count > vc->vc_rows) /* Maximum realistic size */
1909 count = vc->vc_rows;
e703ecc3
JB		 1910 if (logo_shown >= 0)
1911 goto redraw_down;
1da177e4
LT		 1912 switch (p->scrollmode) {
1913 case SCROLL_MOVE:
bad07ff7
KH		 1914 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1915 -count);
1916 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1917 scr_memsetw((unsigned short *) (vc->vc_origin +
1918 vc->vc_size_row *
1919 t),
93f78da4 1920 vc->vc_video_erase_char,
bad07ff7 1921 vc->vc_size_row * count);
93f78da4 1922 return 1;
1da177e4
LT		 1923 break;
1924
1925 case SCROLL_WRAP_MOVE:
1926 if (b - t - count > 3 * vc->vc_rows >> 2) {
1927 if (vc->vc_rows - b > 0)
1928 fbcon_bmove(vc, b, 0, b - count, 0,
1929 vc->vc_rows - b,
1930 vc->vc_cols);
1931 ywrap_down(vc, count);
1932 if (t > 0)
1933 fbcon_bmove(vc, count, 0, 0, 0, t,
1934 vc->vc_cols);
1935 } else if (info->flags & FBINFO_READS_FAST)
1936 fbcon_bmove(vc, t, 0, t + count, 0,
1937 b - t - count, vc->vc_cols);
1938 else
1939 goto redraw_down;
1940 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1941 break;
1942
1943 case SCROLL_PAN_MOVE:
1944 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1945 && ((!scroll_partial && (b - t == vc->vc_rows))
1946 || (scroll_partial
1947 && (b - t - count >
1948 3 * vc->vc_rows >> 2)))) {
1949 if (vc->vc_rows - b > 0)
1950 fbcon_bmove(vc, b, 0, b - count, 0,
1951 vc->vc_rows - b,
1952 vc->vc_cols);
1953 ypan_down(vc, count);
1954 if (t > 0)
1955 fbcon_bmove(vc, count, 0, 0, 0, t,
1956 vc->vc_cols);
1957 } else if (info->flags & FBINFO_READS_FAST)
1958 fbcon_bmove(vc, t, 0, t + count, 0,
1959 b - t - count, vc->vc_cols);
1960 else
1961 goto redraw_down;
1962 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1963 break;
1964
1965 case SCROLL_PAN_REDRAW:
1966 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1967 && ((!scroll_partial && (b - t == vc->vc_rows))
1968 || (scroll_partial
1969 && (b - t - count >
1970 3 * vc->vc_rows >> 2)))) {
1971 if (vc->vc_rows - b > 0)
1972 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1973 b - count);
1974 ypan_down_redraw(vc, t, count);
1975 if (t > 0)
1976 fbcon_redraw_move(vc, p, count, t, 0);
1977 } else
1978 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1979 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1980 break;
1981
1982 case SCROLL_REDRAW:
1983 redraw_down:
1984 fbcon_redraw(vc, p, b - 1, b - t - count,
1985 -count * vc->vc_cols);
1986 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1987 scr_memsetw((unsigned short *) (vc->vc_origin +
1988 vc->vc_size_row *
1989 t),
93f78da4 1990 vc->vc_video_erase_char,
1da177e4 1991 vc->vc_size_row * count);
93f78da4 1992 return 1;
1da177e4
LT		 1993 }
1994 }
93f78da4 1995 return 0;
1da177e4
LT		 1996}
1997
1998
1999static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2000 int height, int width)
2001{
2002 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2003 struct display *p = &fb_display[vc->vc_num];
2004
2005 if (fbcon_is_inactive(vc, info))
2006 return;
2007
2008 if (!width || !height)
2009 return;
2010
2011 /* Split blits that cross physical y_wrap case.
2012 * Pathological case involves 4 blits, better to use recursive
2013 * code rather than unrolled case
2014 *
2015 * Recursive invocations don't need to erase the cursor over and
2016 * over again, so we use fbcon_bmove_rec()
2017 */
2018 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2019 p->vrows - p->yscroll);
2020}
2021
2022static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2023 int dy, int dx, int height, int width, u_int y_break)
2024{
2025 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2026 struct fbcon_ops *ops = info->fbcon_par;
2027 u_int b;
2028
2029 if (sy < y_break && sy + height > y_break) {
2030 b = y_break - sy;
2031 if (dy < sy) { /* Avoid trashing self */
2032 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2033 y_break);
2034 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2035 height - b, width, y_break);
2036 } else {
2037 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2038 height - b, width, y_break);
2039 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2040 y_break);
2041 }
2042 return;
2043 }
2044
2045 if (dy < y_break && dy + height > y_break) {
2046 b = y_break - dy;
2047 if (dy < sy) { /* Avoid trashing self */
2048 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2049 y_break);
2050 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2051 height - b, width, y_break);
2052 } else {
2053 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2054 height - b, width, y_break);
2055 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2056 y_break);
2057 }
2058 return;
2059 }
2060 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2061 height, width);
2062}
2063
def1be2d 2064static void updatescrollmode(struct display *p,
e4fc2761 2065 struct fb_info *info,
1da177e4
LT		 2066 struct vc_data *vc)
2067{
e4fc2761 2068 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2069 int fh = vc->vc_font.height;
2070 int cap = info->flags;
e4fc2761
AD		 2071 u16 t = 0;
2072 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2073 info->fix.xpanstep);
2074 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2075 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2076 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2077 info->var.xres_virtual);
2078 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2079 divides(ypan, vc->vc_font.height) && vyres > yres;
2080 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2081 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 2082 divides(vc->vc_font.height, vyres) &&
2083 divides(vc->vc_font.height, yres);
1da177e4 2084 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 2085 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2086 !(cap & FBINFO_HWACCEL_DISABLED);
2087 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2088 !(cap & FBINFO_HWACCEL_DISABLED);
2089
2090 p->vrows = vyres/fh;
2091 if (yres > (fh * (vc->vc_rows + 1)))
2092 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2093 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 2094 p->vrows--;
2095
2096 if (good_wrap || good_pan) {
2097 if (reading_fast || fast_copyarea)
e4fc2761
AD		 2098 p->scrollmode = good_wrap ?
2099 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 2100 else
2101 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2102 SCROLL_PAN_REDRAW;
2103 } else {
2104 if (reading_fast || (fast_copyarea && !fast_imageblit))
2105 p->scrollmode = SCROLL_MOVE;
2106 else
2107 p->scrollmode = SCROLL_REDRAW;
2108 }
2109}
2110
2111static int fbcon_resize(struct vc_data *vc, unsigned int width,
e400b6ec 2112 unsigned int height, unsigned int user)
1da177e4
LT		 2113{
2114 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2115 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2116 struct display *p = &fb_display[vc->vc_num];
2117 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2118 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2119
2120 virt_w = FBCON_SWAP(ops->rotate, width, height);
2121 virt_h = FBCON_SWAP(ops->rotate, height, width);
2122 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2123 vc->vc_font.height);
2124 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2125 vc->vc_font.width);
2126 var.xres = virt_w * virt_fw;
2127 var.yres = virt_h * virt_fh;
1da177e4
LT		 2128 x_diff = info->var.xres - var.xres;
2129 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2130 if (x_diff < 0 || x_diff > virt_fw ||
2131 y_diff < 0 || y_diff > virt_fh) {
9791d763 2132 const struct fb_videomode *mode;
1da177e4
LT		 2133
2134 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2135 mode = fb_find_best_mode(&var, &info->modelist);
2136 if (mode == NULL)
2137 return -EINVAL;
3084a895 2138 display_to_var(&var, p);
1da177e4 2139 fb_videomode_to_var(&var, mode);
3084a895 2140
e4fc2761 2141 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2142 return -EINVAL;
1da177e4
LT		 2143
2144 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2145 if (CON_IS_VISIBLE(vc)) {
2146 var.activate = FB_ACTIVATE_NOW |
2147 FB_ACTIVATE_FORCE;
2148 fb_set_var(info, &var);
2149 }
2150 var_to_display(p, &info->var, info);
e4fc2761 2151 ops->var = info->var;
1da177e4
LT		 2152 }
2153 updatescrollmode(p, info, vc);
2154 return 0;
2155}
2156
2157static int fbcon_switch(struct vc_data *vc)
2158{
88fb2c6e 2159 struct fb_info *info, *old_info = NULL;
e4fc2761 2160 struct fbcon_ops *ops;
1da177e4
LT		 2161 struct display *p = &fb_display[vc->vc_num];
2162 struct fb_var_screeninfo var;
0fcf6ada 2163 int i, ret, prev_console, charcnt = 256;
1da177e4
LT		 2164
2165 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2166 ops = info->fbcon_par;
1da177e4
LT		 2167
2168 if (softback_top) {
1da177e4
LT		 2169 if (softback_lines)
2170 fbcon_set_origin(vc);
2171 softback_top = softback_curr = softback_in = softback_buf;
2172 softback_lines = 0;
4d9c5b6e 2173 fbcon_update_softback(vc);
1da177e4
LT		 2174 }
2175
2176 if (logo_shown >= 0) {
2177 struct vc_data *conp2 = vc_cons[logo_shown].d;
2178
2179 if (conp2->vc_top == logo_lines
2180 && conp2->vc_bottom == conp2->vc_rows)
2181 conp2->vc_top = 0;
2182 logo_shown = FBCON_LOGO_CANSHOW;
2183 }
2184
e4fc2761 2185 prev_console = ops->currcon;
88fb2c6e
AD		 2186 if (prev_console != -1)
2187 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2188 /*
2189 * FIXME: If we have multiple fbdev's loaded, we need to
2190 * update all info->currcon. Perhaps, we can place this
2191 * in a centralized structure, but this might break some
2192 * drivers.
2193 *
2194 * info->currcon = vc->vc_num;
2195 */
2196 for (i = 0; i < FB_MAX; i++) {
2197 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2198 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2199
e4fc2761 2200 o->currcon = vc->vc_num;
1da177e4
LT		 2201 }
2202 }
2203 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2204 display_to_var(&var, p);
2205 var.activate = FB_ACTIVATE_NOW;
2206
2207 /*
2208 * make sure we don't unnecessarily trip the memcmp()
2209 * in fb_set_var()
2210 */
2211 info->var.activate = var.activate;
10732c35 2212 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
1da177e4 2213 fb_set_var(info, &var);
e4fc2761 2214 ops->var = info->var;
1da177e4 2215
39942fd8
KP		 2216 if (old_info != NULL && (old_info != info ||
2217 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
0fcf6ada
FTS		 2218 if (info->fbops->fb_set_par) {
2219 ret = info->fbops->fb_set_par(info);
2220
2221 if (ret)
2222 printk(KERN_ERR "fbcon_switch: detected "
2223 "unhandled fb_set_par error, "
2224 "error code %d\n", ret);
2225 }
a39bc34e 2226
5428b044 2227 if (old_info != info)
a39bc34e 2228 fbcon_del_cursor_timer(old_info);
88fb2c6e 2229 }
1da177e4 2230
212f2639
AD		 2231 if (fbcon_is_inactive(vc, info) ||
2232 ops->blank_state != FB_BLANK_UNBLANK)
2233 fbcon_del_cursor_timer(info);
2234 else
2235 fbcon_add_cursor_timer(info);
2236
b73deed3 2237 set_blitting_type(vc, info);
e4fc2761
AD		 2238 ops->cursor_reset = 1;
2239
b73deed3 2240 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2241 ops->rotate = FB_ROTATE_UR;
b73deed3 2242 set_blitting_type(vc, info);
e4fc2761 2243 }
1da177e4 2244
b8c90945 2245 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2246 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2247
2248 if (p->userfont)
2249 charcnt = FNTCHARCNT(vc->vc_font.data);
2250
2251 if (charcnt > 256)
2252 vc->vc_complement_mask <<= 1;
2253
1da177e4
LT		 2254 updatescrollmode(p, info, vc);
2255
2256 switch (p->scrollmode) {
2257 case SCROLL_WRAP_MOVE:
2258 scrollback_phys_max = p->vrows - vc->vc_rows;
2259 break;
2260 case SCROLL_PAN_MOVE:
2261 case SCROLL_PAN_REDRAW:
2262 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2263 if (scrollback_phys_max < 0)
2264 scrollback_phys_max = 0;
2265 break;
2266 default:
2267 scrollback_phys_max = 0;
2268 break;
2269 }
e4fc2761 2270
1da177e4
LT		 2271 scrollback_max = 0;
2272 scrollback_current = 0;
4e1567d3
AD		 2273
2274 if (!fbcon_is_inactive(vc, info)) {
2275 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2276 ops->update_start(info);
2277 }
2278
1da177e4
LT		 2279 fbcon_set_palette(vc, color_table);
2280 fbcon_clear_margins(vc, 0);
2281
2282 if (logo_shown == FBCON_LOGO_DRAW) {
2283
2284 logo_shown = fg_console;
2285 /* This is protected above by initmem_freed */
9c44e5f6 2286 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2287 update_region(vc,
2288 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2289 vc->vc_size_row * (vc->vc_bottom -
2290 vc->vc_top) / 2);
2291 return 0;
2292 }
2293 return 1;
2294}
2295
2296static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2297 int blank)
2298{
994efacd
RP		 2299 struct fb_event event;
2300
1da177e4
LT		 2301 if (blank) {
2302 unsigned short charmask = vc->vc_hi_font_mask ?
2303 0x1ff : 0xff;
2304 unsigned short oldc;
2305
2306 oldc = vc->vc_video_erase_char;
2307 vc->vc_video_erase_char &= charmask;
2308 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2309 vc->vc_video_erase_char = oldc;
2310 }
994efacd
RP		 2311
2312
513adb58
AR		 2313 if (!lock_fb_info(info))
2314 return;
994efacd
RP		 2315 event.info = info;
2316 event.data = &blank;
2317 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
513adb58 2318 unlock_fb_info(info);
1da177e4
LT		 2319}
2320
2321static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2322{
2323 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2324 struct fbcon_ops *ops = info->fbcon_par;
2325
2326 if (mode_switch) {
2327 struct fb_var_screeninfo var = info->var;
2328
2329 ops->graphics = 1;
2330
2331 if (!blank) {
2332 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2333 fb_set_var(info, &var);
2334 ops->graphics = 0;
e4fc2761 2335 ops->var = info->var;
f5c15d0b 2336 }
1da177e4
LT		 2337 }
2338
2339 if (!fbcon_is_inactive(vc, info)) {
2340 if (ops->blank_state != blank) {
2341 ops->blank_state = blank;
2342 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2343 ops->cursor_flash = (!blank);
2344
bca404af
DES		 2345 if (!(info->flags & FBINFO_MISC_USEREVENT))
2346 if (fb_blank(info, blank))
2347 fbcon_generic_blank(vc, info, blank);
1da177e4
LT		 2348 }
2349
88fb2c6e
AD		 2350 if (!blank)
2351 update_screen(vc);
2352 }
2353
4d8a2d98 2354 if (mode_switch || fbcon_is_inactive(vc, info) ||
212f2639 2355 ops->blank_state != FB_BLANK_UNBLANK)
88fb2c6e 2356 fbcon_del_cursor_timer(info);
212f2639
AD		 2357 else
2358 fbcon_add_cursor_timer(info);
1da177e4 2359
88fb2c6e 2360 return 0;
1da177e4
LT		 2361}
2362
d219adc1
JB		 2363static int fbcon_debug_enter(struct vc_data *vc)
2364{
2365 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2366 struct fbcon_ops *ops = info->fbcon_par;
2367
2368 ops->save_graphics = ops->graphics;
2369 ops->graphics = 0;
2370 if (info->fbops->fb_debug_enter)
2371 info->fbops->fb_debug_enter(info);
2372 fbcon_set_palette(vc, color_table);
2373 return 0;
2374}
2375
2376static int fbcon_debug_leave(struct vc_data *vc)
2377{
2378 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2379 struct fbcon_ops *ops = info->fbcon_par;
2380
2381 ops->graphics = ops->save_graphics;
2382 if (info->fbops->fb_debug_leave)
2383 info->fbops->fb_debug_leave(info);
2384 return 0;
2385}
2386
1da177e4
LT		 2387static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2388{
2389 u8 *fontdata = vc->vc_font.data;
2390 u8 *data = font->data;
2391 int i, j;
2392
2393 font->width = vc->vc_font.width;
2394 font->height = vc->vc_font.height;
2395 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2396 if (!font->data)
2397 return 0;
2398
2399 if (font->width <= 8) {
2400 j = vc->vc_font.height;
2401 for (i = 0; i < font->charcount; i++) {
2402 memcpy(data, fontdata, j);
2403 memset(data + j, 0, 32 - j);
2404 data += 32;
2405 fontdata += j;
2406 }
2407 } else if (font->width <= 16) {
2408 j = vc->vc_font.height * 2;
2409 for (i = 0; i < font->charcount; i++) {
2410 memcpy(data, fontdata, j);
2411 memset(data + j, 0, 64 - j);
2412 data += 64;
2413 fontdata += j;
2414 }
2415 } else if (font->width <= 24) {
2416 for (i = 0; i < font->charcount; i++) {
2417 for (j = 0; j < vc->vc_font.height; j++) {
2418 *data++ = fontdata[0];
2419 *data++ = fontdata[1];
2420 *data++ = fontdata[2];
2421 fontdata += sizeof(u32);
2422 }
2423 memset(data, 0, 3 * (32 - j));
2424 data += 3 * (32 - j);
2425 }
2426 } else {
2427 j = vc->vc_font.height * 4;
2428 for (i = 0; i < font->charcount; i++) {
2429 memcpy(data, fontdata, j);
2430 memset(data + j, 0, 128 - j);
2431 data += 128;
2432 fontdata += j;
2433 }
2434 }
2435 return 0;
2436}
2437
2438static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2439 const u8 * data, int userfont)
1da177e4
LT		 2440{
2441 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2442 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2443 struct display *p = &fb_display[vc->vc_num];
2444 int resize;
2445 int cnt;
2446 char *old_data = NULL;
2447
2448 if (CON_IS_VISIBLE(vc) && softback_lines)
2449 fbcon_set_origin(vc);
2450
2451 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2452 if (p->userfont)
2453 old_data = vc->vc_font.data;
2454 if (userfont)
2455 cnt = FNTCHARCNT(data);
2456 else
2457 cnt = 256;
2f4516db 2458 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2459 if ((p->userfont = userfont))
2460 REFCOUNT(data)++;
2461 vc->vc_font.width = w;
2462 vc->vc_font.height = h;
2463 if (vc->vc_hi_font_mask && cnt == 256) {
2464 vc->vc_hi_font_mask = 0;
2465 if (vc->vc_can_do_color) {
2466 vc->vc_complement_mask >>= 1;
2467 vc->vc_s_complement_mask >>= 1;
2468 }
2469
2470 /* ++Edmund: reorder the attribute bits */
2471 if (vc->vc_can_do_color) {
2472 unsigned short *cp =
2473 (unsigned short *) vc->vc_origin;
2474 int count = vc->vc_screenbuf_size / 2;
2475 unsigned short c;
2476 for (; count > 0; count--, cp++) {
2477 c = scr_readw(cp);
2478 scr_writew(((c & 0xfe00) >> 1) |
2479 (c & 0xff), cp);
2480 }
2481 c = vc->vc_video_erase_char;
2482 vc->vc_video_erase_char =
2483 ((c & 0xfe00) >> 1) | (c & 0xff);
2484 vc->vc_attr >>= 1;
2485 }
2486 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2487 vc->vc_hi_font_mask = 0x100;
2488 if (vc->vc_can_do_color) {
2489 vc->vc_complement_mask <<= 1;
2490 vc->vc_s_complement_mask <<= 1;
2491 }
2492
2493 /* ++Edmund: reorder the attribute bits */
2494 {
2495 unsigned short *cp =
2496 (unsigned short *) vc->vc_origin;
2497 int count = vc->vc_screenbuf_size / 2;
2498 unsigned short c;
2499 for (; count > 0; count--, cp++) {
2500 unsigned short newc;
2501 c = scr_readw(cp);
2502 if (vc->vc_can_do_color)
2503 newc =
2504 ((c & 0xff00) << 1) | (c &
2505 0xff);
2506 else
2507 newc = c & ~0x100;
2508 scr_writew(newc, cp);
2509 }
2510 c = vc->vc_video_erase_char;
2511 if (vc->vc_can_do_color) {
2512 vc->vc_video_erase_char =
2513 ((c & 0xff00) << 1) | (c & 0xff);
2514 vc->vc_attr <<= 1;
93f78da4 2515 } else
1da177e4
LT		 2516 vc->vc_video_erase_char = c & ~0x100;
2517 }
2518
2519 }
2520
2521 if (resize) {
e4fc2761
AD		 2522 int cols, rows;
2523
2524 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2525 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2526 cols /= w;
2527 rows /= h;
2528 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2529 if (CON_IS_VISIBLE(vc) && softback_buf)
2530 fbcon_update_softback(vc);
1da177e4
LT		 2531 } else if (CON_IS_VISIBLE(vc)
2532 && vc->vc_mode == KD_TEXT) {
2533 fbcon_clear_margins(vc, 0);
2534 update_screen(vc);
2535 }
2536
2537 if (old_data && (--REFCOUNT(old_data) == 0))
2538 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2539 return 0;
2540}
2541
2542static int fbcon_copy_font(struct vc_data *vc, int con)
2543{
2544 struct display *od = &fb_display[con];
2545 struct console_font *f = &vc->vc_font;
2546
2547 if (od->fontdata == f->data)
2548 return 0; /* already the same font... */
2549 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2550}
2551
2552/*
2553 * User asked to set font; we are guaranteed that
2554 * a) width and height are in range 1..32
2555 * b) charcount does not exceed 512
2556 * but lets not assume that, since someone might someday want to use larger
2557 * fonts. And charcount of 512 is small for unicode support.
2558 *
2559 * However, user space gives the font in 32 rows , regardless of
2560 * actual font height. So a new API is needed if support for larger fonts
2561 * is ever implemented.
2562 */
2563
2564static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2565{
2d2699d9 2566 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1da177e4
LT		 2567 unsigned charcount = font->charcount;
2568 int w = font->width;
2569 int h = font->height;
2570 int size;
2571 int i, csum;
2572 u8 *new_data, *data = font->data;
2573 int pitch = (font->width+7) >> 3;
2574
2575 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2576 * If not this check should be changed to charcount < 256 */
2577 if (charcount != 256 && charcount != 512)
2578 return -EINVAL;
2579
2d2699d9
AD		 2580 /* Make sure drawing engine can handle the font */
2581 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2582 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2583 return -EINVAL;
38b4982c
AD		 2584
2585 /* Make sure driver can handle the font length */
2586 if (fbcon_invalid_charcount(info, charcount))
2587 return -EINVAL;
2d2699d9 2588
1da177e4
LT		 2589 size = h * pitch * charcount;
2590
2591 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2592
2593 if (!new_data)
2594 return -ENOMEM;
2595
2596 new_data += FONT_EXTRA_WORDS * sizeof(int);
2597 FNTSIZE(new_data) = size;
2598 FNTCHARCNT(new_data) = charcount;
2599 REFCOUNT(new_data) = 0; /* usage counter */
2600 for (i=0; i< charcount; i++) {
2601 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2602 }
2603
2604 /* Since linux has a nice crc32 function use it for counting font
2605 * checksums. */
2606 csum = crc32(0, new_data, size);
2607
2608 FNTSUM(new_data) = csum;
2609 /* Check if the same font is on some other console already */
e614b18d 2610 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 2611 struct vc_data *tmp = vc_cons[i].d;
2612
2613 if (fb_display[i].userfont &&
2614 fb_display[i].fontdata &&
2615 FNTSUM(fb_display[i].fontdata) == csum &&
2616 FNTSIZE(fb_display[i].fontdata) == size &&
2617 tmp->vc_font.width == w &&
2618 !memcmp(fb_display[i].fontdata, new_data, size)) {
2619 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2620 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2621 break;
2622 }
2623 }
2624 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2625}
2626
2627static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2628{
2629 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2630 const struct font_desc *f;
1da177e4
LT		 2631
2632 if (!name)
2d2699d9
AD		 2633 f = get_default_font(info->var.xres, info->var.yres,
2634 info->pixmap.blit_x, info->pixmap.blit_y);
1da177e4
LT		 2635 else if (!(f = find_font(name)))
2636 return -ENOENT;
2637
2638 font->width = f->width;
2639 font->height = f->height;
2640 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2641}
2642
2643static u16 palette_red[16];
2644static u16 palette_green[16];
2645static u16 palette_blue[16];
2646
2647static struct fb_cmap palette_cmap = {
2648 0, 16, palette_red, palette_green, palette_blue, NULL
2649};
2650
2651static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2652{
2653 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2654 int i, j, k, depth;
2655 u8 val;
2656
2657 if (fbcon_is_inactive(vc, info))
2658 return -EINVAL;
2659
2660 if (!CON_IS_VISIBLE(vc))
2661 return 0;
2662
b8c90945 2663 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2664 if (depth > 3) {
2665 for (i = j = 0; i < 16; i++) {
2666 k = table[i];
2667 val = vc->vc_palette[j++];
2668 palette_red[k] = (val << 8) | val;
2669 val = vc->vc_palette[j++];
2670 palette_green[k] = (val << 8) | val;
2671 val = vc->vc_palette[j++];
2672 palette_blue[k] = (val << 8) | val;
2673 }
2674 palette_cmap.len = 16;
2675 palette_cmap.start = 0;
2676 /*
2677 * If framebuffer is capable of less than 16 colors,
2678 * use default palette of fbcon.
2679 */
2680 } else
2681 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2682
2683 return fb_set_cmap(&palette_cmap, info);
2684}
2685
2686static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2687{
2688 unsigned long p;
2689 int line;
2690
2691 if (vc->vc_num != fg_console || !softback_lines)
2692 return (u16 *) (vc->vc_origin + offset);
2693 line = offset / vc->vc_size_row;
2694 if (line >= softback_lines)
2695 return (u16 *) (vc->vc_origin + offset -
2696 softback_lines * vc->vc_size_row);
2697 p = softback_curr + offset;
2698 if (p >= softback_end)
2699 p += softback_buf - softback_end;
2700 return (u16 *) p;
2701}
2702
2703static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2704 int *px, int *py)
2705{
2706 unsigned long ret;
2707 int x, y;
2708
2709 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2710 unsigned long offset = (pos - vc->vc_origin) / 2;
2711
2712 x = offset % vc->vc_cols;
2713 y = offset / vc->vc_cols;
2714 if (vc->vc_num == fg_console)
2715 y += softback_lines;
2716 ret = pos + (vc->vc_cols - x) * 2;
2717 } else if (vc->vc_num == fg_console && softback_lines) {
2718 unsigned long offset = pos - softback_curr;
2719
2720 if (pos < softback_curr)
2721 offset += softback_end - softback_buf;
2722 offset /= 2;
2723 x = offset % vc->vc_cols;
2724 y = offset / vc->vc_cols;
2725 ret = pos + (vc->vc_cols - x) * 2;
2726 if (ret == softback_end)
2727 ret = softback_buf;
2728 if (ret == softback_in)
2729 ret = vc->vc_origin;
2730 } else {
2731 /* Should not happen */
2732 x = y = 0;
2733 ret = vc->vc_origin;
2734 }
2735 if (px)
2736 *px = x;
2737 if (py)
2738 *py = y;
2739 return ret;
2740}
2741
2742/* As we might be inside of softback, we may work with non-contiguous buffer,
2743 that's why we have to use a separate routine. */
2744static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2745{
2746 while (cnt--) {
2747 u16 a = scr_readw(p);
2748 if (!vc->vc_can_do_color)
2749 a ^= 0x0800;
2750 else if (vc->vc_hi_font_mask == 0x100)
2751 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2752 (((a) & 0x0e00) << 4);
2753 else
2754 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2755 (((a) & 0x0700) << 4);
2756 scr_writew(a, p++);
2757 if (p == (u16 *) softback_end)
2758 p = (u16 *) softback_buf;
2759 if (p == (u16 *) softback_in)
2760 p = (u16 *) vc->vc_origin;
2761 }
2762}
2763
2764static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2765{
2766 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2767 struct fbcon_ops *ops = info->fbcon_par;
2c6cc35c 2768 struct display *disp = &fb_display[fg_console];
1da177e4
LT		 2769 int offset, limit, scrollback_old;
2770
2771 if (softback_top) {
2772 if (vc->vc_num != fg_console)
2773 return 0;
2774 if (vc->vc_mode != KD_TEXT || !lines)
2775 return 0;
2776 if (logo_shown >= 0) {
2777 struct vc_data *conp2 = vc_cons[logo_shown].d;
2778
2779 if (conp2->vc_top == logo_lines
2780 && conp2->vc_bottom == conp2->vc_rows)
2781 conp2->vc_top = 0;
2782 if (logo_shown == vc->vc_num) {
2783 unsigned long p, q;
2784 int i;
2785
2786 p = softback_in;
2787 q = vc->vc_origin +
2788 logo_lines * vc->vc_size_row;
2789 for (i = 0; i < logo_lines; i++) {
2790 if (p == softback_top)
2791 break;
2792 if (p == softback_buf)
2793 p = softback_end;
2794 p -= vc->vc_size_row;
2795 q -= vc->vc_size_row;
2796 scr_memcpyw((u16 *) q, (u16 *) p,
2797 vc->vc_size_row);
2798 }
308af929 2799 softback_in = softback_curr = p;
1da177e4
LT		 2800 update_region(vc, vc->vc_origin,
2801 logo_lines * vc->vc_cols);
2802 }
2803 logo_shown = FBCON_LOGO_CANSHOW;
2804 }
2805 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2c6cc35c 2806 fbcon_redraw_softback(vc, disp, lines);
1da177e4
LT		 2807 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2808 return 0;
2809 }
2810
2811 if (!scrollback_phys_max)
2812 return -ENOSYS;
2813
2814 scrollback_old = scrollback_current;
2815 scrollback_current -= lines;
2816 if (scrollback_current < 0)
2817 scrollback_current = 0;
2818 else if (scrollback_current > scrollback_max)
2819 scrollback_current = scrollback_max;
2820 if (scrollback_current == scrollback_old)
2821 return 0;
2822
2823 if (fbcon_is_inactive(vc, info))
2824 return 0;
2825
2826 fbcon_cursor(vc, CM_ERASE);
2827
2c6cc35c
MS		 2828 offset = disp->yscroll - scrollback_current;
2829 limit = disp->vrows;
2830 switch (disp->scrollmode) {
1da177e4
LT		 2831 case SCROLL_WRAP_MOVE:
2832 info->var.vmode |= FB_VMODE_YWRAP;
2833 break;
2834 case SCROLL_PAN_MOVE:
2835 case SCROLL_PAN_REDRAW:
2836 limit -= vc->vc_rows;
2837 info->var.vmode &= ~FB_VMODE_YWRAP;
2838 break;
2839 }
2840 if (offset < 0)
2841 offset += limit;
2842 else if (offset >= limit)
2843 offset -= limit;
e4fc2761
AD		 2844
2845 ops->var.xoffset = 0;
2846 ops->var.yoffset = offset * vc->vc_font.height;
2847 ops->update_start(info);
2848
1da177e4
LT		 2849 if (!scrollback_current)
2850 fbcon_cursor(vc, CM_DRAW);
2851 return 0;
2852}
2853
2854static int fbcon_set_origin(struct vc_data *vc)
2855{
2856 if (softback_lines)
2857 fbcon_scrolldelta(vc, softback_lines);
2858 return 0;
2859}
2860
2861static void fbcon_suspended(struct fb_info *info)
2862{
2863 struct vc_data *vc = NULL;
2864 struct fbcon_ops *ops = info->fbcon_par;
2865
2866 if (!ops || ops->currcon < 0)
2867 return;
2868 vc = vc_cons[ops->currcon].d;
2869
2870 /* Clear cursor, restore saved data */
2871 fbcon_cursor(vc, CM_ERASE);
2872}
2873
2874static void fbcon_resumed(struct fb_info *info)
2875{
2876 struct vc_data *vc;
2877 struct fbcon_ops *ops = info->fbcon_par;
2878
2879 if (!ops || ops->currcon < 0)
2880 return;
2881 vc = vc_cons[ops->currcon].d;
2882
2883 update_screen(vc);
2884}
2885
2886static void fbcon_modechanged(struct fb_info *info)
2887{
2888 struct fbcon_ops *ops = info->fbcon_par;
2889 struct vc_data *vc;
2890 struct display *p;
2891 int rows, cols;
2892
2893 if (!ops || ops->currcon < 0)
2894 return;
2895 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2896 if (vc->vc_mode != KD_TEXT ||
2897 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2898 return;
2899
2900 p = &fb_display[vc->vc_num];
b73deed3 2901 set_blitting_type(vc, info);
1da177e4
LT		 2902
2903 if (CON_IS_VISIBLE(vc)) {
2904 var_to_display(p, &info->var, info);
e4fc2761
AD		 2905 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2906 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2907 cols /= vc->vc_font.width;
2908 rows /= vc->vc_font.height;
1da177e4
LT		 2909 vc_resize(vc, cols, rows);
2910 updatescrollmode(p, info, vc);
2911 scrollback_max = 0;
2912 scrollback_current = 0;
4e1567d3
AD		 2913
2914 if (!fbcon_is_inactive(vc, info)) {
2915 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2916 ops->update_start(info);
2917 }
2918
1da177e4
LT		 2919 fbcon_set_palette(vc, color_table);
2920 update_screen(vc);
4d9c5b6e
AD		 2921 if (softback_buf)
2922 fbcon_update_softback(vc);
1da177e4
LT		 2923 }
2924}
2925
7726e9e1
AD		 2926static void fbcon_set_all_vcs(struct fb_info *info)
2927{
2928 struct fbcon_ops *ops = info->fbcon_par;
2929 struct vc_data *vc;
2930 struct display *p;
95d67bb1 2931 int i, rows, cols, fg = -1;
7726e9e1
AD		 2932
2933 if (!ops || ops->currcon < 0)
2934 return;
2935
e614b18d 2936 for (i = first_fb_vc; i <= last_fb_vc; i++) {
7726e9e1
AD		 2937 vc = vc_cons[i].d;
2938 if (!vc || vc->vc_mode != KD_TEXT ||
2939 registered_fb[con2fb_map[i]] != info)
2940 continue;
2941
95d67bb1
AD		 2942 if (CON_IS_VISIBLE(vc)) {
2943 fg = i;
2944 continue;
2945 }
2946
7726e9e1 2947 p = &fb_display[vc->vc_num];
b73deed3 2948 set_blitting_type(vc, info);
7726e9e1 2949 var_to_display(p, &info->var, info);
232fb69a
ON		 2950 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2951 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
e4fc2761
AD		 2952 cols /= vc->vc_font.width;
2953 rows /= vc->vc_font.height;
7726e9e1 2954 vc_resize(vc, cols, rows);
7726e9e1 2955 }
04a2fe57 2956
95d67bb1
AD		 2957 if (fg != -1)
2958 fbcon_modechanged(info);
7726e9e1
AD		 2959}
2960
1da177e4
LT		 2961static int fbcon_mode_deleted(struct fb_info *info,
2962 struct fb_videomode *mode)
2963{
2964 struct fb_info *fb_info;
2965 struct display *p;
2966 int i, j, found = 0;
2967
2968 /* before deletion, ensure that mode is not in use */
2969 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2970 j = con2fb_map[i];
2971 if (j == -1)
2972 continue;
2973 fb_info = registered_fb[j];
2974 if (fb_info != info)
2975 continue;
2976 p = &fb_display[i];
2977 if (!p || !p->mode)
2978 continue;
2979 if (fb_mode_is_equal(p->mode, mode)) {
2980 found = 1;
2981 break;
2982 }
2983 }
2984 return found;
2985}
2986
cfafca80
JB		 2987#ifdef CONFIG_VT_HW_CONSOLE_BINDING
2988static int fbcon_unbind(void)
2989{
2990 int ret;
2991
e93a9a86 2992 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
cfafca80 2993 fbcon_is_default);
2ddce3fd
IA		 2994
2995 if (!ret)
2996 fbcon_has_console_bind = 0;
2997
cfafca80
JB		 2998 return ret;
2999}
3000#else
3001static inline int fbcon_unbind(void)
3002{
3003 return -EINVAL;
3004}
3005#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3006
054430e7 3007/* called with console_lock held */
cfafca80
JB		 3008static int fbcon_fb_unbind(int idx)
3009{
3010 int i, new_idx = -1, ret = 0;
3011
2ddce3fd
IA		 3012 if (!fbcon_has_console_bind)
3013 return 0;
3014
cfafca80
JB		 3015 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3016 if (con2fb_map[i] != idx &&
3017 con2fb_map[i] != -1) {
3018 new_idx = i;
3019 break;
3020 }
3021 }
3022
3023 if (new_idx != -1) {
3024 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3025 if (con2fb_map[i] == idx)
3026 set_con2fb_map(i, new_idx, 0);
3027 }
5f4dc28b
KP		 3028 } else {
3029 struct fb_info *info = registered_fb[idx];
3030
3031 /* This is sort of like set_con2fb_map, except it maps
3032 * the consoles to no device and then releases the
3033 * oldinfo to free memory and cancel the cursor blink
3034 * timer. I can imagine this just becoming part of
3035 * set_con2fb_map where new_idx is -1
3036 */
3037 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3038 if (con2fb_map[i] == idx) {
3039 con2fb_map[i] = -1;
3040 if (!search_fb_in_map(idx)) {
3041 ret = con2fb_release_oldinfo(vc_cons[i].d,
3042 info, NULL, i,
3043 idx, 0);
3044 if (ret) {
3045 con2fb_map[i] = idx;
3046 return ret;
3047 }
3048 }
3049 }
3050 }
cfafca80 3051 ret = fbcon_unbind();
5f4dc28b 3052 }
cfafca80
JB		 3053
3054 return ret;
3055}
3056
054430e7 3057/* called with console_lock held */
623e71b0 3058static int fbcon_fb_unregistered(struct fb_info *info)
e614b18d 3059{
66c1ca01 3060 int i, idx;
e614b18d 3061
66c1ca01 3062 idx = info->node;
e614b18d
AD		 3063 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3064 if (con2fb_map[i] == idx)
3065 con2fb_map[i] = -1;
3066 }
3067
3068 if (idx == info_idx) {
3069 info_idx = -1;
3070
3071 for (i = 0; i < FB_MAX; i++) {
3072 if (registered_fb[i] != NULL) {
3073 info_idx = i;
3074 break;
3075 }
3076 }
3077 }
3078
3079 if (info_idx != -1) {
3080 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3081 if (con2fb_map[i] == -1)
3082 con2fb_map[i] = info_idx;
3083 }
3084 }
3085
623e71b0
AD		 3086 if (primary_device == idx)
3087 primary_device = -1;
3088
66c1ca01 3089 if (!num_registered_fb)
e93a9a86 3090 do_unregister_con_driver(&fb_con);
66c1ca01 3091
623e71b0
AD		 3092 return 0;
3093}
3094
054430e7 3095/* called with console_lock held */
6a9ee8af
DA		 3096static void fbcon_remap_all(int idx)
3097{
3098 int i;
3099 for (i = first_fb_vc; i <= last_fb_vc; i++)
3100 set_con2fb_map(i, idx, 0);
3101
3102 if (con_is_bound(&fb_con)) {
3103 printk(KERN_INFO "fbcon: Remapping primary device, "
3104 "fb%i, to tty %i-%i\n", idx,
3105 first_fb_vc + 1, last_fb_vc + 1);
3106 info_idx = idx;
3107 }
3108}
3109
623e71b0 3110#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
afd1db16 3111static void fbcon_select_primary(struct fb_info *info)
623e71b0 3112{
623e71b0
AD		 3113 if (!map_override && primary_device == -1 &&
3114 fb_is_primary_device(info)) {
afd1db16 3115 int i;
623e71b0 3116
afd1db16
AD		 3117 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3118 info->fix.id, info->node);
623e71b0
AD		 3119 primary_device = info->node;
3120
afd1db16 3121 for (i = first_fb_vc; i <= last_fb_vc; i++)
623e71b0 3122 con2fb_map_boot[i] = primary_device;
623e71b0 3123
afd1db16
AD		 3124 if (con_is_bound(&fb_con)) {
3125 printk(KERN_INFO "fbcon: Remapping primary device, "
3126 "fb%i, to tty %i-%i\n", info->node,
3127 first_fb_vc + 1, last_fb_vc + 1);
3128 info_idx = primary_device;
623e71b0 3129 }
623e71b0
AD		 3130 }
3131
623e71b0
AD		 3132}
3133#else
afd1db16 3134static inline void fbcon_select_primary(struct fb_info *info)
623e71b0 3135{
afd1db16 3136 return;
e614b18d 3137}
623e71b0 3138#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
e614b18d 3139
054430e7 3140/* called with console_lock held */
623e71b0 3141static int fbcon_fb_registered(struct fb_info *info)
1da177e4 3142{
66c1ca01 3143 int ret = 0, i, idx;
623e71b0 3144
66c1ca01 3145 idx = info->node;
afd1db16 3146 fbcon_select_primary(info);
1da177e4
LT		 3147
3148 if (info_idx == -1) {
e614b18d 3149 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3150 if (con2fb_map_boot[i] == idx) {
3151 info_idx = idx;
3152 break;
3153 }
3154 }
e614b18d 3155
1da177e4 3156 if (info_idx != -1)
50e244cc 3157 ret = do_fbcon_takeover(1);
1da177e4 3158 } else {
e614b18d 3159 for (i = first_fb_vc; i <= last_fb_vc; i++) {
d1baa4ff 3160 if (con2fb_map_boot[i] == idx)
1da177e4
LT		 3161 set_con2fb_map(i, idx, 0);
3162 }
3163 }
3164
3165 return ret;
3166}
3167
3168static void fbcon_fb_blanked(struct fb_info *info, int blank)
3169{
3170 struct fbcon_ops *ops = info->fbcon_par;
3171 struct vc_data *vc;
3172
3173 if (!ops || ops->currcon < 0)
3174 return;
3175
3176 vc = vc_cons[ops->currcon].d;
3177 if (vc->vc_mode != KD_TEXT ||
3178 registered_fb[con2fb_map[ops->currcon]] != info)
3179 return;
3180
3181 if (CON_IS_VISIBLE(vc)) {
3182 if (blank)
3183 do_blank_screen(0);
3184 else
3185 do_unblank_screen(0);
3186 }
3187 ops->blank_state = blank;
3188}
3189
3190static void fbcon_new_modelist(struct fb_info *info)
3191{
3192 int i;
3193 struct vc_data *vc;
3194 struct fb_var_screeninfo var;
9791d763 3195 const struct fb_videomode *mode;
1da177e4 3196
e614b18d 3197 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 3198 if (registered_fb[con2fb_map[i]] != info)
3199 continue;
3200 if (!fb_display[i].mode)
3201 continue;
3202 vc = vc_cons[i].d;
3203 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 3204 mode = fb_find_nearest_mode(fb_display[i].mode,
3205 &info->modelist);
1da177e4 3206 fb_videomode_to_var(&var, mode);
d1baa4ff 3207 fbcon_set_disp(info, &var, vc->vc_num);
1da177e4
LT		 3208 }
3209}
3210
38a3dc51
AD		 3211static void fbcon_get_requirement(struct fb_info *info,
3212 struct fb_blit_caps *caps)
3213{
3214 struct vc_data *vc;
3215 struct display *p;
38a3dc51
AD		 3216
3217 if (caps->flags) {
167f07f1 3218 int i, charcnt;
38a3dc51
AD		 3219
3220 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3221 vc = vc_cons[i].d;
167f07f1
AD		 3222 if (vc && vc->vc_mode == KD_TEXT &&
3223 info->node == con2fb_map[i]) {
38a3dc51
AD		 3224 p = &fb_display[i];
3225 caps->x |= 1 << (vc->vc_font.width - 1);
3226 caps->y |= 1 << (vc->vc_font.height - 1);
3227 charcnt = (p->userfont) ?
3228 FNTCHARCNT(p->fontdata) : 256;
3229 if (caps->len < charcnt)
3230 caps->len = charcnt;
3231 }
3232 }
3233 } else {
3234 vc = vc_cons[fg_console].d;
3235
167f07f1
AD		 3236 if (vc && vc->vc_mode == KD_TEXT &&
3237 info->node == con2fb_map[fg_console]) {
38a3dc51 3238 p = &fb_display[fg_console];
167f07f1
AD		 3239 caps->x = 1 << (vc->vc_font.width - 1);
3240 caps->y = 1 << (vc->vc_font.height - 1);
3241 caps->len = (p->userfont) ?
38a3dc51 3242 FNTCHARCNT(p->fontdata) : 256;
38a3dc51
AD		 3243 }
3244 }
3245}
3246
66c1ca01 3247static int fbcon_event_notify(struct notifier_block *self,
1da177e4
LT		 3248 unsigned long action, void *data)
3249{
3250 struct fb_event *event = data;
3251 struct fb_info *info = event->info;
3252 struct fb_videomode *mode;
3253 struct fb_con2fbmap *con2fb;
38a3dc51 3254 struct fb_blit_caps *caps;
66c1ca01 3255 int idx, ret = 0;
1da177e4 3256
e614b18d
AD		 3257 /*
3258 * ignore all events except driver registration and deregistration
3259 * if fbcon is not active
3260 */
3261 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3262 action == FB_EVENT_FB_UNREGISTERED))
3263 goto done;
3264
1da177e4
LT		 3265 switch(action) {
3266 case FB_EVENT_SUSPEND:
3267 fbcon_suspended(info);
3268 break;
3269 case FB_EVENT_RESUME:
3270 fbcon_resumed(info);
3271 break;
3272 case FB_EVENT_MODE_CHANGE:
3273 fbcon_modechanged(info);
3274 break;
7726e9e1
AD		 3275 case FB_EVENT_MODE_CHANGE_ALL:
3276 fbcon_set_all_vcs(info);
3277 break;
1da177e4
LT		 3278 case FB_EVENT_MODE_DELETE:
3279 mode = event->data;
3280 ret = fbcon_mode_deleted(info, mode);
3281 break;
cfafca80 3282 case FB_EVENT_FB_UNBIND:
66c1ca01 3283 idx = info->node;
66c1ca01 3284 ret = fbcon_fb_unbind(idx);
cfafca80 3285 break;
1da177e4 3286 case FB_EVENT_FB_REGISTERED:
623e71b0 3287 ret = fbcon_fb_registered(info);
1da177e4 3288 break;
e614b18d 3289 case FB_EVENT_FB_UNREGISTERED:
623e71b0 3290 ret = fbcon_fb_unregistered(info);
e614b18d 3291 break;
1da177e4 3292 case FB_EVENT_SET_CONSOLE_MAP:
054430e7 3293 /* called with console lock held */
1da177e4
LT		 3294 con2fb = event->data;
3295 ret = set_con2fb_map(con2fb->console - 1,
3296 con2fb->framebuffer, 1);
3297 break;
3298 case FB_EVENT_GET_CONSOLE_MAP:
3299 con2fb = event->data;
3300 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3301 break;
3302 case FB_EVENT_BLANK:
3303 fbcon_fb_blanked(info, *(int *)event->data);
3304 break;
3305 case FB_EVENT_NEW_MODELIST:
3306 fbcon_new_modelist(info);
3307 break;
38a3dc51
AD		 3308 case FB_EVENT_GET_REQ:
3309 caps = event->data;
3310 fbcon_get_requirement(info, caps);
3311 break;
6a9ee8af
DA		 3312 case FB_EVENT_REMAP_ALL_CONSOLE:
3313 idx = info->node;
3314 fbcon_remap_all(idx);
3315 break;
1da177e4 3316 }
e614b18d 3317done:
1da177e4
LT		 3318 return ret;
3319}
3320
3321/*
3322 * The console `switch' structure for the frame buffer based console
3323 */
3324
3325static const struct consw fb_con = {
3326 .owner = THIS_MODULE,
3327 .con_startup = fbcon_startup,
3328 .con_init = fbcon_init,
3329 .con_deinit = fbcon_deinit,
3330 .con_clear = fbcon_clear,
3331 .con_putc = fbcon_putc,
3332 .con_putcs = fbcon_putcs,
3333 .con_cursor = fbcon_cursor,
3334 .con_scroll = fbcon_scroll,
3335 .con_bmove = fbcon_bmove,
3336 .con_switch = fbcon_switch,
3337 .con_blank = fbcon_blank,
3338 .con_font_set = fbcon_set_font,
3339 .con_font_get = fbcon_get_font,
3340 .con_font_default = fbcon_set_def_font,
3341 .con_font_copy = fbcon_copy_font,
3342 .con_set_palette = fbcon_set_palette,
3343 .con_scrolldelta = fbcon_scrolldelta,
3344 .con_set_origin = fbcon_set_origin,
3345 .con_invert_region = fbcon_invert_region,
3346 .con_screen_pos = fbcon_screen_pos,
3347 .con_getxy = fbcon_getxy,
3348 .con_resize = fbcon_resize,
d219adc1
JB		 3349 .con_debug_enter = fbcon_debug_enter,
3350 .con_debug_leave = fbcon_debug_leave,
1da177e4
LT		 3351};
3352
3353static struct notifier_block fbcon_event_notifier = {
3354 .notifier_call = fbcon_event_notify,
3355};
3356
0c6c1ce0
AD		 3357static ssize_t store_rotate(struct device *device,
3358 struct device_attribute *attr, const char *buf,
3359 size_t count)
9a179176
AD		 3360{
3361 struct fb_info *info;
3362 int rotate, idx;
3363 char **last = NULL;
3364
e614b18d
AD		 3365 if (fbcon_has_exited)
3366 return count;
3367
ac751efa 3368 console_lock();
9a179176
AD		 3369 idx = con2fb_map[fg_console];
3370
3371 if (idx == -1 || registered_fb[idx] == NULL)
3372 goto err;
3373
3374 info = registered_fb[idx];
3375 rotate = simple_strtoul(buf, last, 0);
3376 fbcon_rotate(info, rotate);
3377err:
ac751efa 3378 console_unlock();
9a179176
AD		 3379 return count;
3380}
3381
0c6c1ce0
AD		 3382static ssize_t store_rotate_all(struct device *device,
3383 struct device_attribute *attr,const char *buf,
3384 size_t count)
9a179176
AD		 3385{
3386 struct fb_info *info;
3387 int rotate, idx;
3388 char **last = NULL;
3389
e614b18d
AD		 3390 if (fbcon_has_exited)
3391 return count;
3392
ac751efa 3393 console_lock();
9a179176
AD		 3394 idx = con2fb_map[fg_console];
3395
3396 if (idx == -1 || registered_fb[idx] == NULL)
3397 goto err;
3398
3399 info = registered_fb[idx];
3400 rotate = simple_strtoul(buf, last, 0);
3401 fbcon_rotate_all(info, rotate);
3402err:
ac751efa 3403 console_unlock();
9a179176
AD		 3404 return count;
3405}
3406
0c6c1ce0
AD		 3407static ssize_t show_rotate(struct device *device,
3408 struct device_attribute *attr,char *buf)
9a179176
AD		 3409{
3410 struct fb_info *info;
3411 int rotate = 0, idx;
3412
e614b18d
AD		 3413 if (fbcon_has_exited)
3414 return 0;
3415
ac751efa 3416 console_lock();
9a179176
AD		 3417 idx = con2fb_map[fg_console];
3418
3419 if (idx == -1 || registered_fb[idx] == NULL)
3420 goto err;
3421
3422 info = registered_fb[idx];
3423 rotate = fbcon_get_rotate(info);
3424err:
ac751efa 3425 console_unlock();
9a179176
AD		 3426 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3427}
3428
0c6c1ce0
AD		 3429static ssize_t show_cursor_blink(struct device *device,
3430 struct device_attribute *attr, char *buf)
acba9cd0
AD		 3431{
3432 struct fb_info *info;
3433 struct fbcon_ops *ops;
3434 int idx, blink = -1;
3435
3436 if (fbcon_has_exited)
3437 return 0;
3438
ac751efa 3439 console_lock();
acba9cd0
AD		 3440 idx = con2fb_map[fg_console];
3441
3442 if (idx == -1 || registered_fb[idx] == NULL)
3443 goto err;
3444
3445 info = registered_fb[idx];
3446 ops = info->fbcon_par;
3447
3448 if (!ops)
3449 goto err;
3450
3451 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3452err:
ac751efa 3453 console_unlock();
acba9cd0
AD		 3454 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3455}
3456
0c6c1ce0
AD		 3457static ssize_t store_cursor_blink(struct device *device,
3458 struct device_attribute *attr,
acba9cd0
AD		 3459 const char *buf, size_t count)
3460{
3461 struct fb_info *info;
3462 int blink, idx;
3463 char **last = NULL;
3464
3465 if (fbcon_has_exited)
3466 return count;
3467
ac751efa 3468 console_lock();
acba9cd0
AD		 3469 idx = con2fb_map[fg_console];
3470
3471 if (idx == -1 || registered_fb[idx] == NULL)
3472 goto err;
3473
3474 info = registered_fb[idx];
3475
3476 if (!info->fbcon_par)
3477 goto err;
3478
3479 blink = simple_strtoul(buf, last, 0);
3480
3481 if (blink) {
3482 fbcon_cursor_noblink = 0;
3483 fbcon_add_cursor_timer(info);
3484 } else {
3485 fbcon_cursor_noblink = 1;
3486 fbcon_del_cursor_timer(info);
3487 }
3488
3489err:
ac751efa 3490 console_unlock();
acba9cd0
AD		 3491 return count;
3492}
3493
0c6c1ce0 3494static struct device_attribute device_attrs[] = {
9a179176
AD		 3495 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3496 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
acba9cd0
AD		 3497 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3498 store_cursor_blink),
9a179176
AD		 3499};
3500
0c6c1ce0 3501static int fbcon_init_device(void)
9a179176 3502{
0a727dea
AD		 3503 int i, error = 0;
3504
3505 fbcon_has_sysfs = 1;
3506
0c6c1ce0
AD		 3507 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3508 error = device_create_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3509
3510 if (error)
3511 break;
3512 }
3513
3514 if (error) {
3515 while (--i >= 0)
0c6c1ce0 3516 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3517
3518 fbcon_has_sysfs = 0;
3519 }
9a179176 3520
9a179176
AD		 3521 return 0;
3522}
3523
5428b044 3524static void fbcon_start(void)
1da177e4 3525{
5428b044
AD		 3526 if (num_registered_fb) {
3527 int i;
9a179176 3528
ac751efa 3529 console_lock();
1da177e4 3530
1da177e4
LT		 3531 for (i = 0; i < FB_MAX; i++) {
3532 if (registered_fb[i] != NULL) {
3533 info_idx = i;
3534 break;
3535 }
3536 }
5428b044 3537
e57f35d4 3538 do_fbcon_takeover(0);
ac751efa 3539 console_unlock();
e57f35d4 3540
1da177e4 3541 }
9a179176
AD		 3542}
3543
5428b044 3544static void fbcon_exit(void)
9a179176 3545{
e55186fe
AD		 3546 struct fb_info *info;
3547 int i, j, mapped;
3548
e614b18d
AD		 3549 if (fbcon_has_exited)
3550 return;
3551
e55186fe 3552 kfree((void *)softback_buf);
5428b044 3553 softback_buf = 0UL;
e55186fe
AD		 3554
3555 for (i = 0; i < FB_MAX; i++) {
142092e5 3556 int pending = 0;
beaa4867 3557
e55186fe
AD		 3558 mapped = 0;
3559 info = registered_fb[i];
3560
3561 if (info == NULL)
3562 continue;
3563
142092e5
JP		 3564 if (info->queue.func)
3565 pending = cancel_work_sync(&info->queue);
beaa4867
GL		 3566 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3567 "no"));
3568
e614b18d 3569 for (j = first_fb_vc; j <= last_fb_vc; j++) {
5aa133d6 3570 if (con2fb_map[j] == i) {
e55186fe 3571 mapped = 1;
5aa133d6
WY		 3572 break;
3573 }
e55186fe
AD		 3574 }
3575
3576 if (mapped) {
3577 if (info->fbops->fb_release)
3578 info->fbops->fb_release(info, 0);
3579 module_put(info->fbops->owner);
5428b044
AD		 3580
3581 if (info->fbcon_par) {
e299dd4d
DJ		 3582 struct fbcon_ops *ops = info->fbcon_par;
3583
5428b044 3584 fbcon_del_cursor_timer(info);
e299dd4d 3585 kfree(ops->cursor_src);
46862145 3586 kfree(ops->cursor_state.mask);
5428b044
AD		 3587 kfree(info->fbcon_par);
3588 info->fbcon_par = NULL;
3589 }
3590
3591 if (info->queue.func == fb_flashcursor)
3592 info->queue.func = NULL;
e55186fe
AD		 3593 }
3594 }
3595
e614b18d 3596 fbcon_has_exited = 1;
5428b044
AD		 3597}
3598
3599static int __init fb_console_init(void)
3600{
3601 int i;
3602
ac751efa 3603 console_lock();
5428b044 3604 fb_register_client(&fbcon_event_notifier);
77997aaa
GKH		 3605 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3606 "fbcon");
5428b044 3607
0c6c1ce0
AD		 3608 if (IS_ERR(fbcon_device)) {
3609 printk(KERN_WARNING "Unable to create device "
5428b044 3610 "for fbcon; errno = %ld\n",
0c6c1ce0
AD		 3611 PTR_ERR(fbcon_device));
3612 fbcon_device = NULL;
5428b044 3613 } else
0c6c1ce0 3614 fbcon_init_device();
5428b044
AD		 3615
3616 for (i = 0; i < MAX_NR_CONSOLES; i++)
3617 con2fb_map[i] = -1;
3618
ac751efa 3619 console_unlock();
5428b044
AD		 3620 fbcon_start();
3621 return 0;
3622}
3623
ba168a3c 3624fs_initcall(fb_console_init);
5428b044
AD		 3625
3626#ifdef MODULE
3627
0c6c1ce0 3628static void __exit fbcon_deinit_device(void)
5428b044
AD		 3629{
3630 int i;
3631
0a727dea 3632 if (fbcon_has_sysfs) {
0c6c1ce0
AD		 3633 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3634 device_remove_file(fbcon_device, &device_attrs[i]);
0a727dea
AD		 3635
3636 fbcon_has_sysfs = 0;
3637 }
9a179176
AD		 3638}
3639
1da177e4
LT		 3640static void __exit fb_console_exit(void)
3641{
ac751efa 3642 console_lock();
1da177e4 3643 fb_unregister_client(&fbcon_event_notifier);
0c6c1ce0
AD		 3644 fbcon_deinit_device();
3645 device_destroy(fb_class, MKDEV(0, 0));
e614b18d 3646 fbcon_exit();
70125e76 3647 do_unregister_con_driver(&fb_con);
ac751efa 3648 console_unlock();
1da177e4
LT		 3649}
3650
3651module_exit(fb_console_exit);
3652
3653#endif
3654
3655MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror