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