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/fbcon.h>
72 #include <linux/vt_kern.h>
73 #include <linux/selection.h>
74 #include <linux/font.h>
75 #include <linux/smp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/crc32.h> /* For counting font checksums */
79 #include <linux/uaccess.h>
80 #include <asm/fb.h>
81 #include <asm/irq.h>
82
83 #include "fbcon.h"
84
85 #ifdef FBCONDEBUG
86 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
87 #else
88 # define DPRINTK(fmt, args...)
89 #endif
90
91 /*
92 * FIXME: Locking
93 *
94 * - fbcon state itself is protected by the console_lock, and the code does a
95 * pretty good job at making sure that lock is held everywhere it's needed.
96 *
97 * - access to the registered_fb array is entirely unprotected. This should use
98 * proper object lifetime handling, i.e. get/put_fb_info. This also means
99 * switching from indices to proper pointers for fb_info everywhere.
100 *
101 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
102 * means concurrent access to the same fbdev from both fbcon and userspace
103 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
104 * of fb_lock/unlock protected sections, since otherwise we'll recurse and
105 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
106 * fbmem.c cannot use locking asserts, and there's lots of callers which get
107 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
108 */
109
110 enum {
111 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
112 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
113 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
114 };
115
116 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
117
118 static signed char con2fb_map[MAX_NR_CONSOLES];
119 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
120
121 static int logo_lines;
122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
123 enums. */
124 static int logo_shown = FBCON_LOGO_CANSHOW;
125 /* console mappings */
126 static unsigned int first_fb_vc;
127 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
128 static int fbcon_is_default = 1;
129 static int primary_device = -1;
130 static int fbcon_has_console_bind;
131
132 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
133 static int map_override;
134
fbcon_map_override(void)135 static inline void fbcon_map_override(void)
136 {
137 map_override = 1;
138 }
139 #else
fbcon_map_override(void)140 static inline void fbcon_map_override(void)
141 {
142 }
143 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
144
145 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
146 static bool deferred_takeover = true;
147 #else
148 #define deferred_takeover false
149 #endif
150
151 /* font data */
152 static char fontname[40];
153
154 /* current fb_info */
155 static int info_idx = -1;
156
157 /* console rotation */
158 static int initial_rotation = -1;
159 static int fbcon_has_sysfs;
160 static int margin_color;
161
162 static const struct consw fb_con;
163
164 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
165
166 static int fbcon_cursor_noblink;
167
168 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
169
170 /*
171 * Interface used by the world
172 */
173
174 static const char *fbcon_startup(void);
175 static void fbcon_init(struct vc_data *vc, int init);
176 static void fbcon_deinit(struct vc_data *vc);
177 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
178 int width);
179 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
180 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
181 int count, int ypos, int xpos);
182 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
183 static void fbcon_cursor(struct vc_data *vc, int mode);
184 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
185 int height, int width);
186 static int fbcon_switch(struct vc_data *vc);
187 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
188 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
189
190 /*
191 * Internal routines
192 */
193 static __inline__ void ywrap_up(struct vc_data *vc, int count);
194 static __inline__ void ywrap_down(struct vc_data *vc, int count);
195 static __inline__ void ypan_up(struct vc_data *vc, int count);
196 static __inline__ void ypan_down(struct vc_data *vc, int count);
197 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
198 int dy, int dx, int height, int width, u_int y_break);
199 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
200 int unit);
201 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
202 int line, int count, int dy);
203 static void fbcon_modechanged(struct fb_info *info);
204 static void fbcon_set_all_vcs(struct fb_info *info);
205 static void fbcon_start(void);
206 static void fbcon_exit(void);
207 static struct device *fbcon_device;
208
209 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
fbcon_set_rotation(struct fb_info * info)210 static inline void fbcon_set_rotation(struct fb_info *info)
211 {
212 struct fbcon_ops *ops = info->fbcon_par;
213
214 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
215 ops->p->con_rotate < 4)
216 ops->rotate = ops->p->con_rotate;
217 else
218 ops->rotate = 0;
219 }
220
fbcon_rotate(struct fb_info * info,u32 rotate)221 static void fbcon_rotate(struct fb_info *info, u32 rotate)
222 {
223 struct fbcon_ops *ops= info->fbcon_par;
224 struct fb_info *fb_info;
225
226 if (!ops || ops->currcon == -1)
227 return;
228
229 fb_info = registered_fb[con2fb_map[ops->currcon]];
230
231 if (info == fb_info) {
232 struct fbcon_display *p = &fb_display[ops->currcon];
233
234 if (rotate < 4)
235 p->con_rotate = rotate;
236 else
237 p->con_rotate = 0;
238
239 fbcon_modechanged(info);
240 }
241 }
242
fbcon_rotate_all(struct fb_info * info,u32 rotate)243 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
244 {
245 struct fbcon_ops *ops = info->fbcon_par;
246 struct vc_data *vc;
247 struct fbcon_display *p;
248 int i;
249
250 if (!ops || ops->currcon < 0 || rotate > 3)
251 return;
252
253 for (i = first_fb_vc; i <= last_fb_vc; i++) {
254 vc = vc_cons[i].d;
255 if (!vc || vc->vc_mode != KD_TEXT ||
256 registered_fb[con2fb_map[i]] != info)
257 continue;
258
259 p = &fb_display[vc->vc_num];
260 p->con_rotate = rotate;
261 }
262
263 fbcon_set_all_vcs(info);
264 }
265 #else
fbcon_set_rotation(struct fb_info * info)266 static inline void fbcon_set_rotation(struct fb_info *info)
267 {
268 struct fbcon_ops *ops = info->fbcon_par;
269
270 ops->rotate = FB_ROTATE_UR;
271 }
272
fbcon_rotate(struct fb_info * info,u32 rotate)273 static void fbcon_rotate(struct fb_info *info, u32 rotate)
274 {
275 return;
276 }
277
fbcon_rotate_all(struct fb_info * info,u32 rotate)278 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
279 {
280 return;
281 }
282 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
283
fbcon_get_rotate(struct fb_info * info)284 static int fbcon_get_rotate(struct fb_info *info)
285 {
286 struct fbcon_ops *ops = info->fbcon_par;
287
288 return (ops) ? ops->rotate : 0;
289 }
290
fbcon_is_inactive(struct vc_data * vc,struct fb_info * info)291 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
292 {
293 struct fbcon_ops *ops = info->fbcon_par;
294
295 return (info->state != FBINFO_STATE_RUNNING ||
296 vc->vc_mode != KD_TEXT || ops->graphics);
297 }
298
get_color(struct vc_data * vc,struct fb_info * info,u16 c,int is_fg)299 static int get_color(struct vc_data *vc, struct fb_info *info,
300 u16 c, int is_fg)
301 {
302 int depth = fb_get_color_depth(&info->var, &info->fix);
303 int color = 0;
304
305 if (console_blanked) {
306 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
307
308 c = vc->vc_video_erase_char & charmask;
309 }
310
311 if (depth != 1)
312 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
313 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
314
315 switch (depth) {
316 case 1:
317 {
318 int col = mono_col(info);
319 /* 0 or 1 */
320 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
321 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
322
323 if (console_blanked)
324 fg = bg;
325
326 color = (is_fg) ? fg : bg;
327 break;
328 }
329 case 2:
330 /*
331 * Scale down 16-colors to 4 colors. Default 4-color palette
332 * is grayscale. However, simply dividing the values by 4
333 * will not work, as colors 1, 2 and 3 will be scaled-down
334 * to zero rendering them invisible. So empirically convert
335 * colors to a sane 4-level grayscale.
336 */
337 switch (color) {
338 case 0:
339 color = 0; /* black */
340 break;
341 case 1 ... 6:
342 color = 2; /* white */
343 break;
344 case 7 ... 8:
345 color = 1; /* gray */
346 break;
347 default:
348 color = 3; /* intense white */
349 break;
350 }
351 break;
352 case 3:
353 /*
354 * Last 8 entries of default 16-color palette is a more intense
355 * version of the first 8 (i.e., same chrominance, different
356 * luminance).
357 */
358 color &= 7;
359 break;
360 }
361
362
363 return color;
364 }
365
fb_flashcursor(struct work_struct * work)366 static void fb_flashcursor(struct work_struct *work)
367 {
368 struct fb_info *info = container_of(work, struct fb_info, queue);
369 struct fbcon_ops *ops = info->fbcon_par;
370 struct vc_data *vc = NULL;
371 int c;
372 int mode;
373 int ret;
374
375 /* FIXME: we should sort out the unbind locking instead */
376 /* instead we just fail to flash the cursor if we can't get
377 * the lock instead of blocking fbcon deinit */
378 ret = console_trylock();
379 if (ret == 0)
380 return;
381
382 if (ops && ops->currcon != -1)
383 vc = vc_cons[ops->currcon].d;
384
385 if (!vc || !con_is_visible(vc) ||
386 registered_fb[con2fb_map[vc->vc_num]] != info ||
387 vc->vc_deccm != 1) {
388 console_unlock();
389 return;
390 }
391
392 c = scr_readw((u16 *) vc->vc_pos);
393 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
394 CM_ERASE : CM_DRAW;
395 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
396 get_color(vc, info, c, 0));
397 console_unlock();
398 }
399
cursor_timer_handler(struct timer_list * t)400 static void cursor_timer_handler(struct timer_list *t)
401 {
402 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
403 struct fb_info *info = ops->info;
404
405 queue_work(system_power_efficient_wq, &info->queue);
406 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
407 }
408
fbcon_add_cursor_timer(struct fb_info * info)409 static void fbcon_add_cursor_timer(struct fb_info *info)
410 {
411 struct fbcon_ops *ops = info->fbcon_par;
412
413 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
414 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
415 !fbcon_cursor_noblink) {
416 if (!info->queue.func)
417 INIT_WORK(&info->queue, fb_flashcursor);
418
419 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
420 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
421 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
422 }
423 }
424
fbcon_del_cursor_timer(struct fb_info * info)425 static void fbcon_del_cursor_timer(struct fb_info *info)
426 {
427 struct fbcon_ops *ops = info->fbcon_par;
428
429 if (info->queue.func == fb_flashcursor &&
430 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
431 del_timer_sync(&ops->cursor_timer);
432 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
433 }
434 }
435
436 #ifndef MODULE
fb_console_setup(char * this_opt)437 static int __init fb_console_setup(char *this_opt)
438 {
439 char *options;
440 int i, j;
441
442 if (!this_opt || !*this_opt)
443 return 1;
444
445 while ((options = strsep(&this_opt, ",")) != NULL) {
446 if (!strncmp(options, "font:", 5)) {
447 strlcpy(fontname, options + 5, sizeof(fontname));
448 continue;
449 }
450
451 if (!strncmp(options, "scrollback:", 11)) {
452 pr_warn("Ignoring scrollback size option\n");
453 continue;
454 }
455
456 if (!strncmp(options, "map:", 4)) {
457 options += 4;
458 if (*options) {
459 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
460 if (!options[j])
461 j = 0;
462 con2fb_map_boot[i] =
463 (options[j++]-'0') % FB_MAX;
464 }
465
466 fbcon_map_override();
467 }
468 continue;
469 }
470
471 if (!strncmp(options, "vc:", 3)) {
472 options += 3;
473 if (*options)
474 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
475 if (first_fb_vc >= MAX_NR_CONSOLES)
476 first_fb_vc = 0;
477 if (*options++ == '-')
478 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
479 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
480 last_fb_vc = MAX_NR_CONSOLES - 1;
481 fbcon_is_default = 0;
482 continue;
483 }
484
485 if (!strncmp(options, "rotate:", 7)) {
486 options += 7;
487 if (*options)
488 initial_rotation = simple_strtoul(options, &options, 0);
489 if (initial_rotation > 3)
490 initial_rotation = 0;
491 continue;
492 }
493
494 if (!strncmp(options, "margin:", 7)) {
495 options += 7;
496 if (*options)
497 margin_color = simple_strtoul(options, &options, 0);
498 continue;
499 }
500 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
501 if (!strcmp(options, "nodefer")) {
502 deferred_takeover = false;
503 continue;
504 }
505 #endif
506
507 if (!strncmp(options, "logo-pos:", 9)) {
508 options += 9;
509 if (!strcmp(options, "center"))
510 fb_center_logo = true;
511 continue;
512 }
513
514 if (!strncmp(options, "logo-count:", 11)) {
515 options += 11;
516 if (*options)
517 fb_logo_count = simple_strtol(options, &options, 0);
518 continue;
519 }
520 }
521 return 1;
522 }
523
524 __setup("fbcon=", fb_console_setup);
525 #endif
526
search_fb_in_map(int idx)527 static int search_fb_in_map(int idx)
528 {
529 int i, retval = 0;
530
531 for (i = first_fb_vc; i <= last_fb_vc; i++) {
532 if (con2fb_map[i] == idx)
533 retval = 1;
534 }
535 return retval;
536 }
537
search_for_mapped_con(void)538 static int search_for_mapped_con(void)
539 {
540 int i, retval = 0;
541
542 for (i = first_fb_vc; i <= last_fb_vc; i++) {
543 if (con2fb_map[i] != -1)
544 retval = 1;
545 }
546 return retval;
547 }
548
do_fbcon_takeover(int show_logo)549 static int do_fbcon_takeover(int show_logo)
550 {
551 int err, i;
552
553 if (!num_registered_fb)
554 return -ENODEV;
555
556 if (!show_logo)
557 logo_shown = FBCON_LOGO_DONTSHOW;
558
559 for (i = first_fb_vc; i <= last_fb_vc; i++)
560 con2fb_map[i] = info_idx;
561
562 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
563 fbcon_is_default);
564
565 if (err) {
566 for (i = first_fb_vc; i <= last_fb_vc; i++)
567 con2fb_map[i] = -1;
568 info_idx = -1;
569 } else {
570 fbcon_has_console_bind = 1;
571 }
572
573 return err;
574 }
575
576 #ifdef MODULE
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)577 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
578 int cols, int rows, int new_cols, int new_rows)
579 {
580 logo_shown = FBCON_LOGO_DONTSHOW;
581 }
582 #else
fbcon_prepare_logo(struct vc_data * vc,struct fb_info * info,int cols,int rows,int new_cols,int new_rows)583 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
584 int cols, int rows, int new_cols, int new_rows)
585 {
586 /* Need to make room for the logo */
587 struct fbcon_ops *ops = info->fbcon_par;
588 int cnt, erase = vc->vc_video_erase_char, step;
589 unsigned short *save = NULL, *r, *q;
590 int logo_height;
591
592 if (info->fbops->owner) {
593 logo_shown = FBCON_LOGO_DONTSHOW;
594 return;
595 }
596
597 /*
598 * remove underline attribute from erase character
599 * if black and white framebuffer.
600 */
601 if (fb_get_color_depth(&info->var, &info->fix) == 1)
602 erase &= ~0x400;
603 logo_height = fb_prepare_logo(info, ops->rotate);
604 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
605 q = (unsigned short *) (vc->vc_origin +
606 vc->vc_size_row * rows);
607 step = logo_lines * cols;
608 for (r = q - logo_lines * cols; r < q; r++)
609 if (scr_readw(r) != vc->vc_video_erase_char)
610 break;
611 if (r != q && new_rows >= rows + logo_lines) {
612 save = kzalloc(array3_size(logo_lines, new_cols, 2),
613 GFP_KERNEL);
614 if (save) {
615 int i = cols < new_cols ? cols : new_cols;
616 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
617 r = q - step;
618 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
619 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
620 r = q;
621 }
622 }
623 if (r == q) {
624 /* We can scroll screen down */
625 r = q - step - cols;
626 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
627 scr_memcpyw(r + step, r, vc->vc_size_row);
628 r -= cols;
629 }
630 if (!save) {
631 int lines;
632 if (vc->state.y + logo_lines >= rows)
633 lines = rows - vc->state.y - 1;
634 else
635 lines = logo_lines;
636 vc->state.y += lines;
637 vc->vc_pos += lines * vc->vc_size_row;
638 }
639 }
640 scr_memsetw((unsigned short *) vc->vc_origin,
641 erase,
642 vc->vc_size_row * logo_lines);
643
644 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
645 fbcon_clear_margins(vc, 0);
646 update_screen(vc);
647 }
648
649 if (save) {
650 q = (unsigned short *) (vc->vc_origin +
651 vc->vc_size_row *
652 rows);
653 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
654 vc->state.y += logo_lines;
655 vc->vc_pos += logo_lines * vc->vc_size_row;
656 kfree(save);
657 }
658
659 if (logo_shown == FBCON_LOGO_DONTSHOW)
660 return;
661
662 if (logo_lines > vc->vc_bottom) {
663 logo_shown = FBCON_LOGO_CANSHOW;
664 printk(KERN_INFO
665 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
666 } else {
667 logo_shown = FBCON_LOGO_DRAW;
668 vc->vc_top = logo_lines;
669 }
670 }
671 #endif /* MODULE */
672
673 #ifdef CONFIG_FB_TILEBLITTING
set_blitting_type(struct vc_data * vc,struct fb_info * info)674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
675 {
676 struct fbcon_ops *ops = info->fbcon_par;
677
678 ops->p = &fb_display[vc->vc_num];
679
680 if ((info->flags & FBINFO_MISC_TILEBLITTING))
681 fbcon_set_tileops(vc, info);
682 else {
683 fbcon_set_rotation(info);
684 fbcon_set_bitops(ops);
685 }
686 }
687
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)688 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
689 {
690 int err = 0;
691
692 if (info->flags & FBINFO_MISC_TILEBLITTING &&
693 info->tileops->fb_get_tilemax(info) < charcount)
694 err = 1;
695
696 return err;
697 }
698 #else
set_blitting_type(struct vc_data * vc,struct fb_info * info)699 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
700 {
701 struct fbcon_ops *ops = info->fbcon_par;
702
703 info->flags &= ~FBINFO_MISC_TILEBLITTING;
704 ops->p = &fb_display[vc->vc_num];
705 fbcon_set_rotation(info);
706 fbcon_set_bitops(ops);
707 }
708
fbcon_invalid_charcount(struct fb_info * info,unsigned charcount)709 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
710 {
711 return 0;
712 }
713
714 #endif /* CONFIG_MISC_TILEBLITTING */
715
716
con2fb_acquire_newinfo(struct vc_data * vc,struct fb_info * info,int unit,int oldidx)717 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
718 int unit, int oldidx)
719 {
720 struct fbcon_ops *ops = NULL;
721 int err = 0;
722
723 if (!try_module_get(info->fbops->owner))
724 err = -ENODEV;
725
726 if (!err && info->fbops->fb_open &&
727 info->fbops->fb_open(info, 0))
728 err = -ENODEV;
729
730 if (!err) {
731 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
732 if (!ops)
733 err = -ENOMEM;
734 }
735
736 if (!err) {
737 ops->cur_blink_jiffies = HZ / 5;
738 ops->info = info;
739 info->fbcon_par = ops;
740
741 if (vc)
742 set_blitting_type(vc, info);
743 }
744
745 if (err) {
746 con2fb_map[unit] = oldidx;
747 module_put(info->fbops->owner);
748 }
749
750 return err;
751 }
752
con2fb_release_oldinfo(struct vc_data * vc,struct fb_info * oldinfo,struct fb_info * newinfo,int unit,int oldidx,int found)753 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
754 struct fb_info *newinfo, int unit,
755 int oldidx, int found)
756 {
757 struct fbcon_ops *ops = oldinfo->fbcon_par;
758 int err = 0, ret;
759
760 if (oldinfo->fbops->fb_release &&
761 oldinfo->fbops->fb_release(oldinfo, 0)) {
762 con2fb_map[unit] = oldidx;
763 if (!found && newinfo->fbops->fb_release)
764 newinfo->fbops->fb_release(newinfo, 0);
765 if (!found)
766 module_put(newinfo->fbops->owner);
767 err = -ENODEV;
768 }
769
770 if (!err) {
771 fbcon_del_cursor_timer(oldinfo);
772 kfree(ops->cursor_state.mask);
773 kfree(ops->cursor_data);
774 kfree(ops->cursor_src);
775 kfree(ops->fontbuffer);
776 kfree(oldinfo->fbcon_par);
777 oldinfo->fbcon_par = NULL;
778 module_put(oldinfo->fbops->owner);
779 /*
780 If oldinfo and newinfo are driving the same hardware,
781 the fb_release() method of oldinfo may attempt to
782 restore the hardware state. This will leave the
783 newinfo in an undefined state. Thus, a call to
784 fb_set_par() may be needed for the newinfo.
785 */
786 if (newinfo && newinfo->fbops->fb_set_par) {
787 ret = newinfo->fbops->fb_set_par(newinfo);
788
789 if (ret)
790 printk(KERN_ERR "con2fb_release_oldinfo: "
791 "detected unhandled fb_set_par error, "
792 "error code %d\n", ret);
793 }
794 }
795
796 return err;
797 }
798
con2fb_init_display(struct vc_data * vc,struct fb_info * info,int unit,int show_logo)799 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
800 int unit, int show_logo)
801 {
802 struct fbcon_ops *ops = info->fbcon_par;
803 int ret;
804
805 ops->currcon = fg_console;
806
807 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
808 ret = info->fbops->fb_set_par(info);
809
810 if (ret)
811 printk(KERN_ERR "con2fb_init_display: detected "
812 "unhandled fb_set_par error, "
813 "error code %d\n", ret);
814 }
815
816 ops->flags |= FBCON_FLAGS_INIT;
817 ops->graphics = 0;
818 fbcon_set_disp(info, &info->var, unit);
819
820 if (show_logo) {
821 struct vc_data *fg_vc = vc_cons[fg_console].d;
822 struct fb_info *fg_info =
823 registered_fb[con2fb_map[fg_console]];
824
825 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
826 fg_vc->vc_rows, fg_vc->vc_cols,
827 fg_vc->vc_rows);
828 }
829
830 update_screen(vc_cons[fg_console].d);
831 }
832
833 /**
834 * set_con2fb_map - map console to frame buffer device
835 * @unit: virtual console number to map
836 * @newidx: frame buffer index to map virtual console to
837 * @user: user request
838 *
839 * Maps a virtual console @unit to a frame buffer device
840 * @newidx.
841 *
842 * This should be called with the console lock held.
843 */
set_con2fb_map(int unit,int newidx,int user)844 static int set_con2fb_map(int unit, int newidx, int user)
845 {
846 struct vc_data *vc = vc_cons[unit].d;
847 int oldidx = con2fb_map[unit];
848 struct fb_info *info = registered_fb[newidx];
849 struct fb_info *oldinfo = NULL;
850 int found, err = 0;
851
852 WARN_CONSOLE_UNLOCKED();
853
854 if (oldidx == newidx)
855 return 0;
856
857 if (!info)
858 return -EINVAL;
859
860 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
861 info_idx = newidx;
862 return do_fbcon_takeover(0);
863 }
864
865 if (oldidx != -1)
866 oldinfo = registered_fb[oldidx];
867
868 found = search_fb_in_map(newidx);
869
870 con2fb_map[unit] = newidx;
871 if (!err && !found)
872 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
873
874 /*
875 * If old fb is not mapped to any of the consoles,
876 * fbcon should release it.
877 */
878 if (!err && oldinfo && !search_fb_in_map(oldidx))
879 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
880 found);
881
882 if (!err) {
883 int show_logo = (fg_console == 0 && !user &&
884 logo_shown != FBCON_LOGO_DONTSHOW);
885
886 if (!found)
887 fbcon_add_cursor_timer(info);
888 con2fb_map_boot[unit] = newidx;
889 con2fb_init_display(vc, info, unit, show_logo);
890 }
891
892 if (!search_fb_in_map(info_idx))
893 info_idx = newidx;
894
895 return err;
896 }
897
898 /*
899 * Low Level Operations
900 */
901 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
var_to_display(struct fbcon_display * disp,struct fb_var_screeninfo * var,struct fb_info * info)902 static int var_to_display(struct fbcon_display *disp,
903 struct fb_var_screeninfo *var,
904 struct fb_info *info)
905 {
906 disp->xres_virtual = var->xres_virtual;
907 disp->yres_virtual = var->yres_virtual;
908 disp->bits_per_pixel = var->bits_per_pixel;
909 disp->grayscale = var->grayscale;
910 disp->nonstd = var->nonstd;
911 disp->accel_flags = var->accel_flags;
912 disp->height = var->height;
913 disp->width = var->width;
914 disp->red = var->red;
915 disp->green = var->green;
916 disp->blue = var->blue;
917 disp->transp = var->transp;
918 disp->rotate = var->rotate;
919 disp->mode = fb_match_mode(var, &info->modelist);
920 if (disp->mode == NULL)
921 /* This should not happen */
922 return -EINVAL;
923 return 0;
924 }
925
display_to_var(struct fb_var_screeninfo * var,struct fbcon_display * disp)926 static void display_to_var(struct fb_var_screeninfo *var,
927 struct fbcon_display *disp)
928 {
929 fb_videomode_to_var(var, disp->mode);
930 var->xres_virtual = disp->xres_virtual;
931 var->yres_virtual = disp->yres_virtual;
932 var->bits_per_pixel = disp->bits_per_pixel;
933 var->grayscale = disp->grayscale;
934 var->nonstd = disp->nonstd;
935 var->accel_flags = disp->accel_flags;
936 var->height = disp->height;
937 var->width = disp->width;
938 var->red = disp->red;
939 var->green = disp->green;
940 var->blue = disp->blue;
941 var->transp = disp->transp;
942 var->rotate = disp->rotate;
943 }
944
fbcon_startup(void)945 static const char *fbcon_startup(void)
946 {
947 const char *display_desc = "frame buffer device";
948 struct fbcon_display *p = &fb_display[fg_console];
949 struct vc_data *vc = vc_cons[fg_console].d;
950 const struct font_desc *font = NULL;
951 struct module *owner;
952 struct fb_info *info = NULL;
953 struct fbcon_ops *ops;
954 int rows, cols;
955
956 /*
957 * If num_registered_fb is zero, this is a call for the dummy part.
958 * The frame buffer devices weren't initialized yet.
959 */
960 if (!num_registered_fb || info_idx == -1)
961 return display_desc;
962 /*
963 * Instead of blindly using registered_fb[0], we use info_idx, set by
964 * fb_console_init();
965 */
966 info = registered_fb[info_idx];
967 if (!info)
968 return NULL;
969
970 owner = info->fbops->owner;
971 if (!try_module_get(owner))
972 return NULL;
973 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
974 module_put(owner);
975 return NULL;
976 }
977
978 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
979 if (!ops) {
980 module_put(owner);
981 return NULL;
982 }
983
984 ops->currcon = -1;
985 ops->graphics = 1;
986 ops->cur_rotate = -1;
987 ops->cur_blink_jiffies = HZ / 5;
988 ops->info = info;
989 info->fbcon_par = ops;
990
991 p->con_rotate = initial_rotation;
992 if (p->con_rotate == -1)
993 p->con_rotate = info->fbcon_rotate_hint;
994 if (p->con_rotate == -1)
995 p->con_rotate = FB_ROTATE_UR;
996
997 set_blitting_type(vc, info);
998
999 /* Setup default font */
1000 if (!p->fontdata && !vc->vc_font.data) {
1001 if (!fontname[0] || !(font = find_font(fontname)))
1002 font = get_default_font(info->var.xres,
1003 info->var.yres,
1004 info->pixmap.blit_x,
1005 info->pixmap.blit_y);
1006 vc->vc_font.width = font->width;
1007 vc->vc_font.height = font->height;
1008 vc->vc_font.data = (void *)(p->fontdata = font->data);
1009 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
1010 } else {
1011 p->fontdata = vc->vc_font.data;
1012 }
1013
1014 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1015 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1016 cols /= vc->vc_font.width;
1017 rows /= vc->vc_font.height;
1018 vc_resize(vc, cols, rows);
1019
1020 DPRINTK("mode: %s\n", info->fix.id);
1021 DPRINTK("visual: %d\n", info->fix.visual);
1022 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1023 info->var.yres,
1024 info->var.bits_per_pixel);
1025
1026 fbcon_add_cursor_timer(info);
1027 return display_desc;
1028 }
1029
fbcon_init(struct vc_data * vc,int init)1030 static void fbcon_init(struct vc_data *vc, int init)
1031 {
1032 struct fb_info *info;
1033 struct fbcon_ops *ops;
1034 struct vc_data **default_mode = vc->vc_display_fg;
1035 struct vc_data *svc = *default_mode;
1036 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1037 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1038 int cap, ret;
1039
1040 if (WARN_ON(info_idx == -1))
1041 return;
1042
1043 if (con2fb_map[vc->vc_num] == -1)
1044 con2fb_map[vc->vc_num] = info_idx;
1045
1046 info = registered_fb[con2fb_map[vc->vc_num]];
1047 cap = info->flags;
1048
1049 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1050 logo_shown = FBCON_LOGO_DONTSHOW;
1051
1052 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1053 (info->fix.type == FB_TYPE_TEXT))
1054 logo = 0;
1055
1056 if (var_to_display(p, &info->var, info))
1057 return;
1058
1059 if (!info->fbcon_par)
1060 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1061
1062 /* If we are not the first console on this
1063 fb, copy the font from that console */
1064 t = &fb_display[fg_console];
1065 if (!p->fontdata) {
1066 if (t->fontdata) {
1067 struct vc_data *fvc = vc_cons[fg_console].d;
1068
1069 vc->vc_font.data = (void *)(p->fontdata =
1070 fvc->vc_font.data);
1071 vc->vc_font.width = fvc->vc_font.width;
1072 vc->vc_font.height = fvc->vc_font.height;
1073 p->userfont = t->userfont;
1074
1075 if (p->userfont)
1076 REFCOUNT(p->fontdata)++;
1077 } else {
1078 const struct font_desc *font = NULL;
1079
1080 if (!fontname[0] || !(font = find_font(fontname)))
1081 font = get_default_font(info->var.xres,
1082 info->var.yres,
1083 info->pixmap.blit_x,
1084 info->pixmap.blit_y);
1085 vc->vc_font.width = font->width;
1086 vc->vc_font.height = font->height;
1087 vc->vc_font.data = (void *)(p->fontdata = font->data);
1088 vc->vc_font.charcount = 256; /* FIXME Need to
1089 support more fonts */
1090 }
1091 }
1092
1093 if (p->userfont)
1094 charcnt = FNTCHARCNT(p->fontdata);
1095
1096 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1097 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1098 if (charcnt == 256) {
1099 vc->vc_hi_font_mask = 0;
1100 } else {
1101 vc->vc_hi_font_mask = 0x100;
1102 if (vc->vc_can_do_color)
1103 vc->vc_complement_mask <<= 1;
1104 }
1105
1106 if (!*svc->vc_uni_pagedir_loc)
1107 con_set_default_unimap(svc);
1108 if (!*vc->vc_uni_pagedir_loc)
1109 con_copy_unimap(vc, svc);
1110
1111 ops = info->fbcon_par;
1112 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1113
1114 p->con_rotate = initial_rotation;
1115 if (p->con_rotate == -1)
1116 p->con_rotate = info->fbcon_rotate_hint;
1117 if (p->con_rotate == -1)
1118 p->con_rotate = FB_ROTATE_UR;
1119
1120 set_blitting_type(vc, info);
1121
1122 cols = vc->vc_cols;
1123 rows = vc->vc_rows;
1124 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1125 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1126 new_cols /= vc->vc_font.width;
1127 new_rows /= vc->vc_font.height;
1128
1129 /*
1130 * We must always set the mode. The mode of the previous console
1131 * driver could be in the same resolution but we are using different
1132 * hardware so we have to initialize the hardware.
1133 *
1134 * We need to do it in fbcon_init() to prevent screen corruption.
1135 */
1136 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1137 if (info->fbops->fb_set_par &&
1138 !(ops->flags & FBCON_FLAGS_INIT)) {
1139 ret = info->fbops->fb_set_par(info);
1140
1141 if (ret)
1142 printk(KERN_ERR "fbcon_init: detected "
1143 "unhandled fb_set_par error, "
1144 "error code %d\n", ret);
1145 }
1146
1147 ops->flags |= FBCON_FLAGS_INIT;
1148 }
1149
1150 ops->graphics = 0;
1151
1152 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1153 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1154 !(cap & FBINFO_HWACCEL_DISABLED))
1155 p->scrollmode = SCROLL_MOVE;
1156 else /* default to something safe */
1157 p->scrollmode = SCROLL_REDRAW;
1158 #endif
1159
1160 /*
1161 * ++guenther: console.c:vc_allocate() relies on initializing
1162 * vc_{cols,rows}, but we must not set those if we are only
1163 * resizing the console.
1164 */
1165 if (init) {
1166 vc->vc_cols = new_cols;
1167 vc->vc_rows = new_rows;
1168 } else
1169 vc_resize(vc, new_cols, new_rows);
1170
1171 if (logo)
1172 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1173
1174 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1175 ops->rotate = FB_ROTATE_UR;
1176 set_blitting_type(vc, info);
1177 }
1178
1179 ops->p = &fb_display[fg_console];
1180 }
1181
fbcon_free_font(struct fbcon_display * p,bool freefont)1182 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1183 {
1184 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1185 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1186 p->fontdata = NULL;
1187 p->userfont = 0;
1188 }
1189
1190 static void set_vc_hi_font(struct vc_data *vc, bool set);
1191
fbcon_deinit(struct vc_data * vc)1192 static void fbcon_deinit(struct vc_data *vc)
1193 {
1194 struct fbcon_display *p = &fb_display[vc->vc_num];
1195 struct fb_info *info;
1196 struct fbcon_ops *ops;
1197 int idx;
1198 bool free_font = true;
1199
1200 idx = con2fb_map[vc->vc_num];
1201
1202 if (idx == -1)
1203 goto finished;
1204
1205 info = registered_fb[idx];
1206
1207 if (!info)
1208 goto finished;
1209
1210 if (info->flags & FBINFO_MISC_FIRMWARE)
1211 free_font = false;
1212 ops = info->fbcon_par;
1213
1214 if (!ops)
1215 goto finished;
1216
1217 if (con_is_visible(vc))
1218 fbcon_del_cursor_timer(info);
1219
1220 ops->flags &= ~FBCON_FLAGS_INIT;
1221 finished:
1222
1223 fbcon_free_font(p, free_font);
1224 if (free_font)
1225 vc->vc_font.data = NULL;
1226
1227 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1228 set_vc_hi_font(vc, false);
1229
1230 if (!con_is_bound(&fb_con))
1231 fbcon_exit();
1232
1233 if (vc->vc_num == logo_shown)
1234 logo_shown = FBCON_LOGO_CANSHOW;
1235
1236 return;
1237 }
1238
1239 /* ====================================================================== */
1240
1241 /* fbcon_XXX routines - interface used by the world
1242 *
1243 * This system is now divided into two levels because of complications
1244 * caused by hardware scrolling. Top level functions:
1245 *
1246 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1247 *
1248 * handles y values in range [0, scr_height-1] that correspond to real
1249 * screen positions. y_wrap shift means that first line of bitmap may be
1250 * anywhere on this display. These functions convert lineoffsets to
1251 * bitmap offsets and deal with the wrap-around case by splitting blits.
1252 *
1253 * fbcon_bmove_physical_8() -- These functions fast implementations
1254 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1255 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1256 *
1257 * WARNING:
1258 *
1259 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1260 * Implies should only really hardware scroll in rows. Only reason for
1261 * restriction is simplicity & efficiency at the moment.
1262 */
1263
fbcon_clear(struct vc_data * vc,int sy,int sx,int height,int width)1264 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1265 int width)
1266 {
1267 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1268 struct fbcon_ops *ops = info->fbcon_par;
1269
1270 struct fbcon_display *p = &fb_display[vc->vc_num];
1271 u_int y_break;
1272
1273 if (fbcon_is_inactive(vc, info))
1274 return;
1275
1276 if (!height || !width)
1277 return;
1278
1279 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1280 vc->vc_top = 0;
1281 /*
1282 * If the font dimensions are not an integral of the display
1283 * dimensions then the ops->clear below won't end up clearing
1284 * the margins. Call clear_margins here in case the logo
1285 * bitmap stretched into the margin area.
1286 */
1287 fbcon_clear_margins(vc, 0);
1288 }
1289
1290 /* Split blits that cross physical y_wrap boundary */
1291
1292 y_break = p->vrows - p->yscroll;
1293 if (sy < y_break && sy + height - 1 >= y_break) {
1294 u_int b = y_break - sy;
1295 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1296 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1297 width);
1298 } else
1299 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1300 }
1301
fbcon_putcs(struct vc_data * vc,const unsigned short * s,int count,int ypos,int xpos)1302 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1303 int count, int ypos, int xpos)
1304 {
1305 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1306 struct fbcon_display *p = &fb_display[vc->vc_num];
1307 struct fbcon_ops *ops = info->fbcon_par;
1308
1309 if (!fbcon_is_inactive(vc, info))
1310 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1311 get_color(vc, info, scr_readw(s), 1),
1312 get_color(vc, info, scr_readw(s), 0));
1313 }
1314
fbcon_putc(struct vc_data * vc,int c,int ypos,int xpos)1315 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1316 {
1317 unsigned short chr;
1318
1319 scr_writew(c, &chr);
1320 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1321 }
1322
fbcon_clear_margins(struct vc_data * vc,int bottom_only)1323 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1324 {
1325 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1326 struct fbcon_ops *ops = info->fbcon_par;
1327
1328 if (!fbcon_is_inactive(vc, info))
1329 ops->clear_margins(vc, info, margin_color, bottom_only);
1330 }
1331
fbcon_cursor(struct vc_data * vc,int mode)1332 static void fbcon_cursor(struct vc_data *vc, int mode)
1333 {
1334 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1335 struct fbcon_ops *ops = info->fbcon_par;
1336 int c = scr_readw((u16 *) vc->vc_pos);
1337
1338 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1339
1340 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1341 return;
1342
1343 if (vc->vc_cursor_type & CUR_SW)
1344 fbcon_del_cursor_timer(info);
1345 else
1346 fbcon_add_cursor_timer(info);
1347
1348 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1349
1350 if (!ops->cursor)
1351 return;
1352
1353 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1354 get_color(vc, info, c, 0));
1355 }
1356
1357 static int scrollback_phys_max = 0;
1358 static int scrollback_max = 0;
1359 static int scrollback_current = 0;
1360
fbcon_set_disp(struct fb_info * info,struct fb_var_screeninfo * var,int unit)1361 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1362 int unit)
1363 {
1364 struct fbcon_display *p, *t;
1365 struct vc_data **default_mode, *vc;
1366 struct vc_data *svc;
1367 struct fbcon_ops *ops = info->fbcon_par;
1368 int rows, cols, charcnt = 256;
1369
1370 p = &fb_display[unit];
1371
1372 if (var_to_display(p, var, info))
1373 return;
1374
1375 vc = vc_cons[unit].d;
1376
1377 if (!vc)
1378 return;
1379
1380 default_mode = vc->vc_display_fg;
1381 svc = *default_mode;
1382 t = &fb_display[svc->vc_num];
1383
1384 if (!vc->vc_font.data) {
1385 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1386 vc->vc_font.width = (*default_mode)->vc_font.width;
1387 vc->vc_font.height = (*default_mode)->vc_font.height;
1388 p->userfont = t->userfont;
1389 if (p->userfont)
1390 REFCOUNT(p->fontdata)++;
1391 }
1392 if (p->userfont)
1393 charcnt = FNTCHARCNT(p->fontdata);
1394
1395 var->activate = FB_ACTIVATE_NOW;
1396 info->var.activate = var->activate;
1397 var->yoffset = info->var.yoffset;
1398 var->xoffset = info->var.xoffset;
1399 fb_set_var(info, var);
1400 ops->var = info->var;
1401 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1402 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1403 if (charcnt == 256) {
1404 vc->vc_hi_font_mask = 0;
1405 } else {
1406 vc->vc_hi_font_mask = 0x100;
1407 if (vc->vc_can_do_color)
1408 vc->vc_complement_mask <<= 1;
1409 }
1410
1411 if (!*svc->vc_uni_pagedir_loc)
1412 con_set_default_unimap(svc);
1413 if (!*vc->vc_uni_pagedir_loc)
1414 con_copy_unimap(vc, svc);
1415
1416 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1417 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1418 cols /= vc->vc_font.width;
1419 rows /= vc->vc_font.height;
1420 vc_resize(vc, cols, rows);
1421
1422 if (con_is_visible(vc)) {
1423 update_screen(vc);
1424 }
1425 }
1426
ywrap_up(struct vc_data * vc,int count)1427 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1428 {
1429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1430 struct fbcon_ops *ops = info->fbcon_par;
1431 struct fbcon_display *p = &fb_display[vc->vc_num];
1432
1433 p->yscroll += count;
1434 if (p->yscroll >= p->vrows) /* Deal with wrap */
1435 p->yscroll -= p->vrows;
1436 ops->var.xoffset = 0;
1437 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1438 ops->var.vmode |= FB_VMODE_YWRAP;
1439 ops->update_start(info);
1440 scrollback_max += count;
1441 if (scrollback_max > scrollback_phys_max)
1442 scrollback_max = scrollback_phys_max;
1443 scrollback_current = 0;
1444 }
1445
ywrap_down(struct vc_data * vc,int count)1446 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1447 {
1448 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1449 struct fbcon_ops *ops = info->fbcon_par;
1450 struct fbcon_display *p = &fb_display[vc->vc_num];
1451
1452 p->yscroll -= count;
1453 if (p->yscroll < 0) /* Deal with wrap */
1454 p->yscroll += p->vrows;
1455 ops->var.xoffset = 0;
1456 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1457 ops->var.vmode |= FB_VMODE_YWRAP;
1458 ops->update_start(info);
1459 scrollback_max -= count;
1460 if (scrollback_max < 0)
1461 scrollback_max = 0;
1462 scrollback_current = 0;
1463 }
1464
ypan_up(struct vc_data * vc,int count)1465 static __inline__ void ypan_up(struct vc_data *vc, int count)
1466 {
1467 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1468 struct fbcon_display *p = &fb_display[vc->vc_num];
1469 struct fbcon_ops *ops = info->fbcon_par;
1470
1471 p->yscroll += count;
1472 if (p->yscroll > p->vrows - vc->vc_rows) {
1473 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1474 0, 0, 0, vc->vc_rows, vc->vc_cols);
1475 p->yscroll -= p->vrows - vc->vc_rows;
1476 }
1477
1478 ops->var.xoffset = 0;
1479 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1480 ops->var.vmode &= ~FB_VMODE_YWRAP;
1481 ops->update_start(info);
1482 fbcon_clear_margins(vc, 1);
1483 scrollback_max += count;
1484 if (scrollback_max > scrollback_phys_max)
1485 scrollback_max = scrollback_phys_max;
1486 scrollback_current = 0;
1487 }
1488
ypan_up_redraw(struct vc_data * vc,int t,int count)1489 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1490 {
1491 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1492 struct fbcon_ops *ops = info->fbcon_par;
1493 struct fbcon_display *p = &fb_display[vc->vc_num];
1494
1495 p->yscroll += count;
1496
1497 if (p->yscroll > p->vrows - vc->vc_rows) {
1498 p->yscroll -= p->vrows - vc->vc_rows;
1499 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1500 }
1501
1502 ops->var.xoffset = 0;
1503 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1504 ops->var.vmode &= ~FB_VMODE_YWRAP;
1505 ops->update_start(info);
1506 fbcon_clear_margins(vc, 1);
1507 scrollback_max += count;
1508 if (scrollback_max > scrollback_phys_max)
1509 scrollback_max = scrollback_phys_max;
1510 scrollback_current = 0;
1511 }
1512
ypan_down(struct vc_data * vc,int count)1513 static __inline__ void ypan_down(struct vc_data *vc, int count)
1514 {
1515 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1516 struct fbcon_display *p = &fb_display[vc->vc_num];
1517 struct fbcon_ops *ops = info->fbcon_par;
1518
1519 p->yscroll -= count;
1520 if (p->yscroll < 0) {
1521 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1522 0, vc->vc_rows, vc->vc_cols);
1523 p->yscroll += p->vrows - vc->vc_rows;
1524 }
1525
1526 ops->var.xoffset = 0;
1527 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1528 ops->var.vmode &= ~FB_VMODE_YWRAP;
1529 ops->update_start(info);
1530 fbcon_clear_margins(vc, 1);
1531 scrollback_max -= count;
1532 if (scrollback_max < 0)
1533 scrollback_max = 0;
1534 scrollback_current = 0;
1535 }
1536
ypan_down_redraw(struct vc_data * vc,int t,int count)1537 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1538 {
1539 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1540 struct fbcon_ops *ops = info->fbcon_par;
1541 struct fbcon_display *p = &fb_display[vc->vc_num];
1542
1543 p->yscroll -= count;
1544
1545 if (p->yscroll < 0) {
1546 p->yscroll += p->vrows - vc->vc_rows;
1547 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1548 }
1549
1550 ops->var.xoffset = 0;
1551 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1552 ops->var.vmode &= ~FB_VMODE_YWRAP;
1553 ops->update_start(info);
1554 fbcon_clear_margins(vc, 1);
1555 scrollback_max -= count;
1556 if (scrollback_max < 0)
1557 scrollback_max = 0;
1558 scrollback_current = 0;
1559 }
1560
fbcon_redraw_move(struct vc_data * vc,struct fbcon_display * p,int line,int count,int dy)1561 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1562 int line, int count, int dy)
1563 {
1564 unsigned short *s = (unsigned short *)
1565 (vc->vc_origin + vc->vc_size_row * line);
1566
1567 while (count--) {
1568 unsigned short *start = s;
1569 unsigned short *le = advance_row(s, 1);
1570 unsigned short c;
1571 int x = 0;
1572 unsigned short attr = 1;
1573
1574 do {
1575 c = scr_readw(s);
1576 if (attr != (c & 0xff00)) {
1577 attr = c & 0xff00;
1578 if (s > start) {
1579 fbcon_putcs(vc, start, s - start,
1580 dy, x);
1581 x += s - start;
1582 start = s;
1583 }
1584 }
1585 console_conditional_schedule();
1586 s++;
1587 } while (s < le);
1588 if (s > start)
1589 fbcon_putcs(vc, start, s - start, dy, x);
1590 console_conditional_schedule();
1591 dy++;
1592 }
1593 }
1594
fbcon_redraw_blit(struct vc_data * vc,struct fb_info * info,struct fbcon_display * p,int line,int count,int ycount)1595 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1596 struct fbcon_display *p, int line, int count, int ycount)
1597 {
1598 int offset = ycount * vc->vc_cols;
1599 unsigned short *d = (unsigned short *)
1600 (vc->vc_origin + vc->vc_size_row * line);
1601 unsigned short *s = d + offset;
1602 struct fbcon_ops *ops = info->fbcon_par;
1603
1604 while (count--) {
1605 unsigned short *start = s;
1606 unsigned short *le = advance_row(s, 1);
1607 unsigned short c;
1608 int x = 0;
1609
1610 do {
1611 c = scr_readw(s);
1612
1613 if (c == scr_readw(d)) {
1614 if (s > start) {
1615 ops->bmove(vc, info, line + ycount, x,
1616 line, x, 1, s-start);
1617 x += s - start + 1;
1618 start = s + 1;
1619 } else {
1620 x++;
1621 start++;
1622 }
1623 }
1624
1625 scr_writew(c, d);
1626 console_conditional_schedule();
1627 s++;
1628 d++;
1629 } while (s < le);
1630 if (s > start)
1631 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1632 s-start);
1633 console_conditional_schedule();
1634 if (ycount > 0)
1635 line++;
1636 else {
1637 line--;
1638 /* NOTE: We subtract two lines from these pointers */
1639 s -= vc->vc_size_row;
1640 d -= vc->vc_size_row;
1641 }
1642 }
1643 }
1644
fbcon_redraw(struct vc_data * vc,struct fbcon_display * p,int line,int count,int offset)1645 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1646 int line, int count, int offset)
1647 {
1648 unsigned short *d = (unsigned short *)
1649 (vc->vc_origin + vc->vc_size_row * line);
1650 unsigned short *s = d + offset;
1651
1652 while (count--) {
1653 unsigned short *start = s;
1654 unsigned short *le = advance_row(s, 1);
1655 unsigned short c;
1656 int x = 0;
1657 unsigned short attr = 1;
1658
1659 do {
1660 c = scr_readw(s);
1661 if (attr != (c & 0xff00)) {
1662 attr = c & 0xff00;
1663 if (s > start) {
1664 fbcon_putcs(vc, start, s - start,
1665 line, x);
1666 x += s - start;
1667 start = s;
1668 }
1669 }
1670 if (c == scr_readw(d)) {
1671 if (s > start) {
1672 fbcon_putcs(vc, start, s - start,
1673 line, x);
1674 x += s - start + 1;
1675 start = s + 1;
1676 } else {
1677 x++;
1678 start++;
1679 }
1680 }
1681 scr_writew(c, d);
1682 console_conditional_schedule();
1683 s++;
1684 d++;
1685 } while (s < le);
1686 if (s > start)
1687 fbcon_putcs(vc, start, s - start, line, x);
1688 console_conditional_schedule();
1689 if (offset > 0)
1690 line++;
1691 else {
1692 line--;
1693 /* NOTE: We subtract two lines from these pointers */
1694 s -= vc->vc_size_row;
1695 d -= vc->vc_size_row;
1696 }
1697 }
1698 }
1699
fbcon_scroll(struct vc_data * vc,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int count)1700 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1701 enum con_scroll dir, unsigned int count)
1702 {
1703 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1704 struct fbcon_display *p = &fb_display[vc->vc_num];
1705 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1706
1707 if (fbcon_is_inactive(vc, info))
1708 return true;
1709
1710 fbcon_cursor(vc, CM_ERASE);
1711
1712 /*
1713 * ++Geert: Only use ywrap/ypan if the console is in text mode
1714 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1715 * whole screen (prevents flicker).
1716 */
1717
1718 switch (dir) {
1719 case SM_UP:
1720 if (count > vc->vc_rows) /* Maximum realistic size */
1721 count = vc->vc_rows;
1722 switch (fb_scrollmode(p)) {
1723 case SCROLL_MOVE:
1724 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1725 count);
1726 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1727 scr_memsetw((unsigned short *) (vc->vc_origin +
1728 vc->vc_size_row *
1729 (b - count)),
1730 vc->vc_video_erase_char,
1731 vc->vc_size_row * count);
1732 return true;
1733
1734 case SCROLL_WRAP_MOVE:
1735 if (b - t - count > 3 * vc->vc_rows >> 2) {
1736 if (t > 0)
1737 fbcon_bmove(vc, 0, 0, count, 0, t,
1738 vc->vc_cols);
1739 ywrap_up(vc, count);
1740 if (vc->vc_rows - b > 0)
1741 fbcon_bmove(vc, b - count, 0, b, 0,
1742 vc->vc_rows - b,
1743 vc->vc_cols);
1744 } else if (info->flags & FBINFO_READS_FAST)
1745 fbcon_bmove(vc, t + count, 0, t, 0,
1746 b - t - count, vc->vc_cols);
1747 else
1748 goto redraw_up;
1749 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1750 break;
1751
1752 case SCROLL_PAN_REDRAW:
1753 if ((p->yscroll + count <=
1754 2 * (p->vrows - vc->vc_rows))
1755 && ((!scroll_partial && (b - t == vc->vc_rows))
1756 || (scroll_partial
1757 && (b - t - count >
1758 3 * vc->vc_rows >> 2)))) {
1759 if (t > 0)
1760 fbcon_redraw_move(vc, p, 0, t, count);
1761 ypan_up_redraw(vc, t, count);
1762 if (vc->vc_rows - b > 0)
1763 fbcon_redraw_move(vc, p, b,
1764 vc->vc_rows - b, b);
1765 } else
1766 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1767 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1768 break;
1769
1770 case SCROLL_PAN_MOVE:
1771 if ((p->yscroll + count <=
1772 2 * (p->vrows - vc->vc_rows))
1773 && ((!scroll_partial && (b - t == vc->vc_rows))
1774 || (scroll_partial
1775 && (b - t - count >
1776 3 * vc->vc_rows >> 2)))) {
1777 if (t > 0)
1778 fbcon_bmove(vc, 0, 0, count, 0, t,
1779 vc->vc_cols);
1780 ypan_up(vc, count);
1781 if (vc->vc_rows - b > 0)
1782 fbcon_bmove(vc, b - count, 0, b, 0,
1783 vc->vc_rows - b,
1784 vc->vc_cols);
1785 } else if (info->flags & FBINFO_READS_FAST)
1786 fbcon_bmove(vc, t + count, 0, t, 0,
1787 b - t - count, vc->vc_cols);
1788 else
1789 goto redraw_up;
1790 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1791 break;
1792
1793 case SCROLL_REDRAW:
1794 redraw_up:
1795 fbcon_redraw(vc, p, t, b - t - count,
1796 count * vc->vc_cols);
1797 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1798 scr_memsetw((unsigned short *) (vc->vc_origin +
1799 vc->vc_size_row *
1800 (b - count)),
1801 vc->vc_video_erase_char,
1802 vc->vc_size_row * count);
1803 return true;
1804 }
1805 break;
1806
1807 case SM_DOWN:
1808 if (count > vc->vc_rows) /* Maximum realistic size */
1809 count = vc->vc_rows;
1810 switch (fb_scrollmode(p)) {
1811 case SCROLL_MOVE:
1812 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1813 -count);
1814 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1815 scr_memsetw((unsigned short *) (vc->vc_origin +
1816 vc->vc_size_row *
1817 t),
1818 vc->vc_video_erase_char,
1819 vc->vc_size_row * count);
1820 return true;
1821
1822 case SCROLL_WRAP_MOVE:
1823 if (b - t - count > 3 * vc->vc_rows >> 2) {
1824 if (vc->vc_rows - b > 0)
1825 fbcon_bmove(vc, b, 0, b - count, 0,
1826 vc->vc_rows - b,
1827 vc->vc_cols);
1828 ywrap_down(vc, count);
1829 if (t > 0)
1830 fbcon_bmove(vc, count, 0, 0, 0, t,
1831 vc->vc_cols);
1832 } else if (info->flags & FBINFO_READS_FAST)
1833 fbcon_bmove(vc, t, 0, t + count, 0,
1834 b - t - count, vc->vc_cols);
1835 else
1836 goto redraw_down;
1837 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1838 break;
1839
1840 case SCROLL_PAN_MOVE:
1841 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1842 && ((!scroll_partial && (b - t == vc->vc_rows))
1843 || (scroll_partial
1844 && (b - t - count >
1845 3 * vc->vc_rows >> 2)))) {
1846 if (vc->vc_rows - b > 0)
1847 fbcon_bmove(vc, b, 0, b - count, 0,
1848 vc->vc_rows - b,
1849 vc->vc_cols);
1850 ypan_down(vc, count);
1851 if (t > 0)
1852 fbcon_bmove(vc, count, 0, 0, 0, t,
1853 vc->vc_cols);
1854 } else if (info->flags & FBINFO_READS_FAST)
1855 fbcon_bmove(vc, t, 0, t + count, 0,
1856 b - t - count, vc->vc_cols);
1857 else
1858 goto redraw_down;
1859 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1860 break;
1861
1862 case SCROLL_PAN_REDRAW:
1863 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1864 && ((!scroll_partial && (b - t == vc->vc_rows))
1865 || (scroll_partial
1866 && (b - t - count >
1867 3 * vc->vc_rows >> 2)))) {
1868 if (vc->vc_rows - b > 0)
1869 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1870 b - count);
1871 ypan_down_redraw(vc, t, count);
1872 if (t > 0)
1873 fbcon_redraw_move(vc, p, count, t, 0);
1874 } else
1875 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1876 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1877 break;
1878
1879 case SCROLL_REDRAW:
1880 redraw_down:
1881 fbcon_redraw(vc, p, b - 1, b - t - count,
1882 -count * vc->vc_cols);
1883 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1884 scr_memsetw((unsigned short *) (vc->vc_origin +
1885 vc->vc_size_row *
1886 t),
1887 vc->vc_video_erase_char,
1888 vc->vc_size_row * count);
1889 return true;
1890 }
1891 }
1892 return false;
1893 }
1894
1895
fbcon_bmove(struct vc_data * vc,int sy,int sx,int dy,int dx,int height,int width)1896 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1897 int height, int width)
1898 {
1899 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1900 struct fbcon_display *p = &fb_display[vc->vc_num];
1901
1902 if (fbcon_is_inactive(vc, info))
1903 return;
1904
1905 if (!width || !height)
1906 return;
1907
1908 /* Split blits that cross physical y_wrap case.
1909 * Pathological case involves 4 blits, better to use recursive
1910 * code rather than unrolled case
1911 *
1912 * Recursive invocations don't need to erase the cursor over and
1913 * over again, so we use fbcon_bmove_rec()
1914 */
1915 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1916 p->vrows - p->yscroll);
1917 }
1918
fbcon_bmove_rec(struct vc_data * vc,struct fbcon_display * p,int sy,int sx,int dy,int dx,int height,int width,u_int y_break)1919 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1920 int dy, int dx, int height, int width, u_int y_break)
1921 {
1922 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1923 struct fbcon_ops *ops = info->fbcon_par;
1924 u_int b;
1925
1926 if (sy < y_break && sy + height > y_break) {
1927 b = y_break - sy;
1928 if (dy < sy) { /* Avoid trashing self */
1929 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1930 y_break);
1931 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1932 height - b, width, y_break);
1933 } else {
1934 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1935 height - b, width, y_break);
1936 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1937 y_break);
1938 }
1939 return;
1940 }
1941
1942 if (dy < y_break && dy + height > y_break) {
1943 b = y_break - dy;
1944 if (dy < sy) { /* Avoid trashing self */
1945 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1946 y_break);
1947 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1948 height - b, width, y_break);
1949 } else {
1950 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1951 height - b, width, y_break);
1952 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1953 y_break);
1954 }
1955 return;
1956 }
1957 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1958 height, width);
1959 }
1960
updatescrollmode_accel(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)1961 static void updatescrollmode_accel(struct fbcon_display *p,
1962 struct fb_info *info,
1963 struct vc_data *vc)
1964 {
1965 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1966 struct fbcon_ops *ops = info->fbcon_par;
1967 int cap = info->flags;
1968 u16 t = 0;
1969 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1970 info->fix.xpanstep);
1971 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1972 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1973 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1974 info->var.xres_virtual);
1975 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1976 divides(ypan, vc->vc_font.height) && vyres > yres;
1977 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1978 divides(ywrap, vc->vc_font.height) &&
1979 divides(vc->vc_font.height, vyres) &&
1980 divides(vc->vc_font.height, yres);
1981 int reading_fast = cap & FBINFO_READS_FAST;
1982 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1983 !(cap & FBINFO_HWACCEL_DISABLED);
1984 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1985 !(cap & FBINFO_HWACCEL_DISABLED);
1986
1987 if (good_wrap || good_pan) {
1988 if (reading_fast || fast_copyarea)
1989 p->scrollmode = good_wrap ?
1990 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1991 else
1992 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1993 SCROLL_PAN_REDRAW;
1994 } else {
1995 if (reading_fast || (fast_copyarea && !fast_imageblit))
1996 p->scrollmode = SCROLL_MOVE;
1997 else
1998 p->scrollmode = SCROLL_REDRAW;
1999 }
2000 #endif
2001 }
2002
updatescrollmode(struct fbcon_display * p,struct fb_info * info,struct vc_data * vc)2003 static void updatescrollmode(struct fbcon_display *p,
2004 struct fb_info *info,
2005 struct vc_data *vc)
2006 {
2007 struct fbcon_ops *ops = info->fbcon_par;
2008 int fh = vc->vc_font.height;
2009 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2010 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2011 info->var.xres_virtual);
2012
2013 p->vrows = vyres/fh;
2014 if (yres > (fh * (vc->vc_rows + 1)))
2015 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2016 if ((yres % fh) && (vyres % fh < yres % fh))
2017 p->vrows--;
2018
2019 /* update scrollmode in case hardware acceleration is used */
2020 updatescrollmode_accel(p, info, vc);
2021 }
2022
2023 #define PITCH(w) (((w) + 7) >> 3)
2024 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2025
fbcon_resize(struct vc_data * vc,unsigned int width,unsigned int height,unsigned int user)2026 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2027 unsigned int height, unsigned int user)
2028 {
2029 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2030 struct fbcon_ops *ops = info->fbcon_par;
2031 struct fbcon_display *p = &fb_display[vc->vc_num];
2032 struct fb_var_screeninfo var = info->var;
2033 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2034
2035 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2036 int size;
2037 int pitch = PITCH(vc->vc_font.width);
2038
2039 /*
2040 * If user font, ensure that a possible change to user font
2041 * height or width will not allow a font data out-of-bounds access.
2042 * NOTE: must use original charcount in calculation as font
2043 * charcount can change and cannot be used to determine the
2044 * font data allocated size.
2045 */
2046 if (pitch <= 0)
2047 return -EINVAL;
2048 size = CALC_FONTSZ(vc->vc_font.height, pitch, FNTCHARCNT(vc->vc_font.data));
2049 if (size > FNTSIZE(vc->vc_font.data))
2050 return -EINVAL;
2051 }
2052
2053 virt_w = FBCON_SWAP(ops->rotate, width, height);
2054 virt_h = FBCON_SWAP(ops->rotate, height, width);
2055 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2056 vc->vc_font.height);
2057 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2058 vc->vc_font.width);
2059 var.xres = virt_w * virt_fw;
2060 var.yres = virt_h * virt_fh;
2061 x_diff = info->var.xres - var.xres;
2062 y_diff = info->var.yres - var.yres;
2063 if (x_diff < 0 || x_diff > virt_fw ||
2064 y_diff < 0 || y_diff > virt_fh) {
2065 const struct fb_videomode *mode;
2066
2067 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2068 mode = fb_find_best_mode(&var, &info->modelist);
2069 if (mode == NULL)
2070 return -EINVAL;
2071 display_to_var(&var, p);
2072 fb_videomode_to_var(&var, mode);
2073
2074 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2075 return -EINVAL;
2076
2077 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2078 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2079 var.activate = FB_ACTIVATE_NOW |
2080 FB_ACTIVATE_FORCE;
2081 fb_set_var(info, &var);
2082 }
2083 var_to_display(p, &info->var, info);
2084 ops->var = info->var;
2085 }
2086 updatescrollmode(p, info, vc);
2087 return 0;
2088 }
2089
fbcon_switch(struct vc_data * vc)2090 static int fbcon_switch(struct vc_data *vc)
2091 {
2092 struct fb_info *info, *old_info = NULL;
2093 struct fbcon_ops *ops;
2094 struct fbcon_display *p = &fb_display[vc->vc_num];
2095 struct fb_var_screeninfo var;
2096 int i, ret, prev_console, charcnt = 256;
2097
2098 info = registered_fb[con2fb_map[vc->vc_num]];
2099 ops = info->fbcon_par;
2100
2101 if (logo_shown >= 0) {
2102 struct vc_data *conp2 = vc_cons[logo_shown].d;
2103
2104 if (conp2->vc_top == logo_lines
2105 && conp2->vc_bottom == conp2->vc_rows)
2106 conp2->vc_top = 0;
2107 logo_shown = FBCON_LOGO_CANSHOW;
2108 }
2109
2110 prev_console = ops->currcon;
2111 if (prev_console != -1)
2112 old_info = registered_fb[con2fb_map[prev_console]];
2113 /*
2114 * FIXME: If we have multiple fbdev's loaded, we need to
2115 * update all info->currcon. Perhaps, we can place this
2116 * in a centralized structure, but this might break some
2117 * drivers.
2118 *
2119 * info->currcon = vc->vc_num;
2120 */
2121 for_each_registered_fb(i) {
2122 if (registered_fb[i]->fbcon_par) {
2123 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2124
2125 o->currcon = vc->vc_num;
2126 }
2127 }
2128 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2129 display_to_var(&var, p);
2130 var.activate = FB_ACTIVATE_NOW;
2131
2132 /*
2133 * make sure we don't unnecessarily trip the memcmp()
2134 * in fb_set_var()
2135 */
2136 info->var.activate = var.activate;
2137 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2138 fb_set_var(info, &var);
2139 ops->var = info->var;
2140
2141 if (old_info != NULL && (old_info != info ||
2142 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2143 if (info->fbops->fb_set_par) {
2144 ret = info->fbops->fb_set_par(info);
2145
2146 if (ret)
2147 printk(KERN_ERR "fbcon_switch: detected "
2148 "unhandled fb_set_par error, "
2149 "error code %d\n", ret);
2150 }
2151
2152 if (old_info != info)
2153 fbcon_del_cursor_timer(old_info);
2154 }
2155
2156 if (fbcon_is_inactive(vc, info) ||
2157 ops->blank_state != FB_BLANK_UNBLANK)
2158 fbcon_del_cursor_timer(info);
2159 else
2160 fbcon_add_cursor_timer(info);
2161
2162 set_blitting_type(vc, info);
2163 ops->cursor_reset = 1;
2164
2165 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2166 ops->rotate = FB_ROTATE_UR;
2167 set_blitting_type(vc, info);
2168 }
2169
2170 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2171 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2172
2173 if (p->userfont)
2174 charcnt = FNTCHARCNT(vc->vc_font.data);
2175
2176 if (charcnt > 256)
2177 vc->vc_complement_mask <<= 1;
2178
2179 updatescrollmode(p, info, vc);
2180
2181 switch (fb_scrollmode(p)) {
2182 case SCROLL_WRAP_MOVE:
2183 scrollback_phys_max = p->vrows - vc->vc_rows;
2184 break;
2185 case SCROLL_PAN_MOVE:
2186 case SCROLL_PAN_REDRAW:
2187 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2188 if (scrollback_phys_max < 0)
2189 scrollback_phys_max = 0;
2190 break;
2191 default:
2192 scrollback_phys_max = 0;
2193 break;
2194 }
2195
2196 scrollback_max = 0;
2197 scrollback_current = 0;
2198
2199 if (!fbcon_is_inactive(vc, info)) {
2200 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2201 ops->update_start(info);
2202 }
2203
2204 fbcon_set_palette(vc, color_table);
2205 fbcon_clear_margins(vc, 0);
2206
2207 if (logo_shown == FBCON_LOGO_DRAW) {
2208
2209 logo_shown = fg_console;
2210 /* This is protected above by initmem_freed */
2211 fb_show_logo(info, ops->rotate);
2212 update_region(vc,
2213 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2214 vc->vc_size_row * (vc->vc_bottom -
2215 vc->vc_top) / 2);
2216 return 0;
2217 }
2218 return 1;
2219 }
2220
fbcon_generic_blank(struct vc_data * vc,struct fb_info * info,int blank)2221 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2222 int blank)
2223 {
2224 if (blank) {
2225 unsigned short charmask = vc->vc_hi_font_mask ?
2226 0x1ff : 0xff;
2227 unsigned short oldc;
2228
2229 oldc = vc->vc_video_erase_char;
2230 vc->vc_video_erase_char &= charmask;
2231 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2232 vc->vc_video_erase_char = oldc;
2233 }
2234 }
2235
fbcon_blank(struct vc_data * vc,int blank,int mode_switch)2236 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2237 {
2238 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2239 struct fbcon_ops *ops = info->fbcon_par;
2240
2241 if (mode_switch) {
2242 struct fb_var_screeninfo var = info->var;
2243
2244 ops->graphics = 1;
2245
2246 if (!blank) {
2247 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2248 FB_ACTIVATE_KD_TEXT;
2249 fb_set_var(info, &var);
2250 ops->graphics = 0;
2251 ops->var = info->var;
2252 }
2253 }
2254
2255 if (!fbcon_is_inactive(vc, info)) {
2256 if (ops->blank_state != blank) {
2257 ops->blank_state = blank;
2258 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2259 ops->cursor_flash = (!blank);
2260
2261 if (fb_blank(info, blank))
2262 fbcon_generic_blank(vc, info, blank);
2263 }
2264
2265 if (!blank)
2266 update_screen(vc);
2267 }
2268
2269 if (mode_switch || fbcon_is_inactive(vc, info) ||
2270 ops->blank_state != FB_BLANK_UNBLANK)
2271 fbcon_del_cursor_timer(info);
2272 else
2273 fbcon_add_cursor_timer(info);
2274
2275 return 0;
2276 }
2277
fbcon_debug_enter(struct vc_data * vc)2278 static int fbcon_debug_enter(struct vc_data *vc)
2279 {
2280 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2281 struct fbcon_ops *ops = info->fbcon_par;
2282
2283 ops->save_graphics = ops->graphics;
2284 ops->graphics = 0;
2285 if (info->fbops->fb_debug_enter)
2286 info->fbops->fb_debug_enter(info);
2287 fbcon_set_palette(vc, color_table);
2288 return 0;
2289 }
2290
fbcon_debug_leave(struct vc_data * vc)2291 static int fbcon_debug_leave(struct vc_data *vc)
2292 {
2293 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2294 struct fbcon_ops *ops = info->fbcon_par;
2295
2296 ops->graphics = ops->save_graphics;
2297 if (info->fbops->fb_debug_leave)
2298 info->fbops->fb_debug_leave(info);
2299 return 0;
2300 }
2301
fbcon_get_font(struct vc_data * vc,struct console_font * font)2302 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2303 {
2304 u8 *fontdata = vc->vc_font.data;
2305 u8 *data = font->data;
2306 int i, j;
2307
2308 font->width = vc->vc_font.width;
2309 font->height = vc->vc_font.height;
2310 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2311 if (!font->data)
2312 return 0;
2313
2314 if (font->width <= 8) {
2315 j = vc->vc_font.height;
2316 if (font->charcount * j > FNTSIZE(fontdata))
2317 return -EINVAL;
2318
2319 for (i = 0; i < font->charcount; i++) {
2320 memcpy(data, fontdata, j);
2321 memset(data + j, 0, 32 - j);
2322 data += 32;
2323 fontdata += j;
2324 }
2325 } else if (font->width <= 16) {
2326 j = vc->vc_font.height * 2;
2327 if (font->charcount * j > FNTSIZE(fontdata))
2328 return -EINVAL;
2329
2330 for (i = 0; i < font->charcount; i++) {
2331 memcpy(data, fontdata, j);
2332 memset(data + j, 0, 64 - j);
2333 data += 64;
2334 fontdata += j;
2335 }
2336 } else if (font->width <= 24) {
2337 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2338 return -EINVAL;
2339
2340 for (i = 0; i < font->charcount; i++) {
2341 for (j = 0; j < vc->vc_font.height; j++) {
2342 *data++ = fontdata[0];
2343 *data++ = fontdata[1];
2344 *data++ = fontdata[2];
2345 fontdata += sizeof(u32);
2346 }
2347 memset(data, 0, 3 * (32 - j));
2348 data += 3 * (32 - j);
2349 }
2350 } else {
2351 j = vc->vc_font.height * 4;
2352 if (font->charcount * j > FNTSIZE(fontdata))
2353 return -EINVAL;
2354
2355 for (i = 0; i < font->charcount; i++) {
2356 memcpy(data, fontdata, j);
2357 memset(data + j, 0, 128 - j);
2358 data += 128;
2359 fontdata += j;
2360 }
2361 }
2362 return 0;
2363 }
2364
2365 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
set_vc_hi_font(struct vc_data * vc,bool set)2366 static void set_vc_hi_font(struct vc_data *vc, bool set)
2367 {
2368 if (!set) {
2369 vc->vc_hi_font_mask = 0;
2370 if (vc->vc_can_do_color) {
2371 vc->vc_complement_mask >>= 1;
2372 vc->vc_s_complement_mask >>= 1;
2373 }
2374
2375 /* ++Edmund: reorder the attribute bits */
2376 if (vc->vc_can_do_color) {
2377 unsigned short *cp =
2378 (unsigned short *) vc->vc_origin;
2379 int count = vc->vc_screenbuf_size / 2;
2380 unsigned short c;
2381 for (; count > 0; count--, cp++) {
2382 c = scr_readw(cp);
2383 scr_writew(((c & 0xfe00) >> 1) |
2384 (c & 0xff), cp);
2385 }
2386 c = vc->vc_video_erase_char;
2387 vc->vc_video_erase_char =
2388 ((c & 0xfe00) >> 1) | (c & 0xff);
2389 vc->vc_attr >>= 1;
2390 }
2391 } else {
2392 vc->vc_hi_font_mask = 0x100;
2393 if (vc->vc_can_do_color) {
2394 vc->vc_complement_mask <<= 1;
2395 vc->vc_s_complement_mask <<= 1;
2396 }
2397
2398 /* ++Edmund: reorder the attribute bits */
2399 {
2400 unsigned short *cp =
2401 (unsigned short *) vc->vc_origin;
2402 int count = vc->vc_screenbuf_size / 2;
2403 unsigned short c;
2404 for (; count > 0; count--, cp++) {
2405 unsigned short newc;
2406 c = scr_readw(cp);
2407 if (vc->vc_can_do_color)
2408 newc =
2409 ((c & 0xff00) << 1) | (c &
2410 0xff);
2411 else
2412 newc = c & ~0x100;
2413 scr_writew(newc, cp);
2414 }
2415 c = vc->vc_video_erase_char;
2416 if (vc->vc_can_do_color) {
2417 vc->vc_video_erase_char =
2418 ((c & 0xff00) << 1) | (c & 0xff);
2419 vc->vc_attr <<= 1;
2420 } else
2421 vc->vc_video_erase_char = c & ~0x100;
2422 }
2423 }
2424 }
2425
fbcon_do_set_font(struct vc_data * vc,int w,int h,const u8 * data,int userfont)2426 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2427 const u8 * data, int userfont)
2428 {
2429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2430 struct fbcon_ops *ops = info->fbcon_par;
2431 struct fbcon_display *p = &fb_display[vc->vc_num];
2432 int resize;
2433 int cnt;
2434 char *old_data = NULL;
2435
2436 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2437 if (p->userfont)
2438 old_data = vc->vc_font.data;
2439 if (userfont)
2440 cnt = FNTCHARCNT(data);
2441 else
2442 cnt = 256;
2443 vc->vc_font.data = (void *)(p->fontdata = data);
2444 if ((p->userfont = userfont))
2445 REFCOUNT(data)++;
2446 vc->vc_font.width = w;
2447 vc->vc_font.height = h;
2448 if (vc->vc_hi_font_mask && cnt == 256)
2449 set_vc_hi_font(vc, false);
2450 else if (!vc->vc_hi_font_mask && cnt == 512)
2451 set_vc_hi_font(vc, true);
2452
2453 if (resize) {
2454 int cols, rows;
2455
2456 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2457 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2458 cols /= w;
2459 rows /= h;
2460 vc_resize(vc, cols, rows);
2461 } else if (con_is_visible(vc)
2462 && vc->vc_mode == KD_TEXT) {
2463 fbcon_clear_margins(vc, 0);
2464 update_screen(vc);
2465 }
2466
2467 if (old_data && (--REFCOUNT(old_data) == 0))
2468 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2469 return 0;
2470 }
2471
fbcon_copy_font(struct vc_data * vc,int con)2472 static int fbcon_copy_font(struct vc_data *vc, int con)
2473 {
2474 struct fbcon_display *od = &fb_display[con];
2475 struct console_font *f = &vc->vc_font;
2476
2477 if (od->fontdata == f->data)
2478 return 0; /* already the same font... */
2479 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2480 }
2481
2482 /*
2483 * User asked to set font; we are guaranteed that
2484 * a) width and height are in range 1..32
2485 * b) charcount does not exceed 512
2486 * but lets not assume that, since someone might someday want to use larger
2487 * fonts. And charcount of 512 is small for unicode support.
2488 *
2489 * However, user space gives the font in 32 rows , regardless of
2490 * actual font height. So a new API is needed if support for larger fonts
2491 * is ever implemented.
2492 */
2493
fbcon_set_font(struct vc_data * vc,struct console_font * font,unsigned int flags)2494 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2495 unsigned int flags)
2496 {
2497 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2498 unsigned charcount = font->charcount;
2499 int w = font->width;
2500 int h = font->height;
2501 int size;
2502 int i, csum;
2503 u8 *new_data, *data = font->data;
2504 int pitch = PITCH(font->width);
2505
2506 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2507 * If not this check should be changed to charcount < 256 */
2508 if (charcount != 256 && charcount != 512)
2509 return -EINVAL;
2510
2511 /* font bigger than screen resolution ? */
2512 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
2513 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
2514 return -EINVAL;
2515
2516 /* Make sure drawing engine can handle the font */
2517 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2518 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2519 return -EINVAL;
2520
2521 /* Make sure driver can handle the font length */
2522 if (fbcon_invalid_charcount(info, charcount))
2523 return -EINVAL;
2524
2525 size = CALC_FONTSZ(h, pitch, charcount);
2526
2527 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2528
2529 if (!new_data)
2530 return -ENOMEM;
2531
2532 new_data += FONT_EXTRA_WORDS * sizeof(int);
2533 FNTSIZE(new_data) = size;
2534 FNTCHARCNT(new_data) = charcount;
2535 REFCOUNT(new_data) = 0; /* usage counter */
2536 for (i=0; i< charcount; i++) {
2537 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2538 }
2539
2540 /* Since linux has a nice crc32 function use it for counting font
2541 * checksums. */
2542 csum = crc32(0, new_data, size);
2543
2544 FNTSUM(new_data) = csum;
2545 /* Check if the same font is on some other console already */
2546 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2547 struct vc_data *tmp = vc_cons[i].d;
2548
2549 if (fb_display[i].userfont &&
2550 fb_display[i].fontdata &&
2551 FNTSUM(fb_display[i].fontdata) == csum &&
2552 FNTSIZE(fb_display[i].fontdata) == size &&
2553 tmp->vc_font.width == w &&
2554 !memcmp(fb_display[i].fontdata, new_data, size)) {
2555 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2556 new_data = (u8 *)fb_display[i].fontdata;
2557 break;
2558 }
2559 }
2560 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2561 }
2562
fbcon_set_def_font(struct vc_data * vc,struct console_font * font,char * name)2563 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2564 {
2565 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2566 const struct font_desc *f;
2567
2568 if (!name)
2569 f = get_default_font(info->var.xres, info->var.yres,
2570 info->pixmap.blit_x, info->pixmap.blit_y);
2571 else if (!(f = find_font(name)))
2572 return -ENOENT;
2573
2574 font->width = f->width;
2575 font->height = f->height;
2576 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2577 }
2578
2579 static u16 palette_red[16];
2580 static u16 palette_green[16];
2581 static u16 palette_blue[16];
2582
2583 static struct fb_cmap palette_cmap = {
2584 0, 16, palette_red, palette_green, palette_blue, NULL
2585 };
2586
fbcon_set_palette(struct vc_data * vc,const unsigned char * table)2587 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2588 {
2589 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2590 int i, j, k, depth;
2591 u8 val;
2592
2593 if (fbcon_is_inactive(vc, info))
2594 return;
2595
2596 if (!con_is_visible(vc))
2597 return;
2598
2599 depth = fb_get_color_depth(&info->var, &info->fix);
2600 if (depth > 3) {
2601 for (i = j = 0; i < 16; i++) {
2602 k = table[i];
2603 val = vc->vc_palette[j++];
2604 palette_red[k] = (val << 8) | val;
2605 val = vc->vc_palette[j++];
2606 palette_green[k] = (val << 8) | val;
2607 val = vc->vc_palette[j++];
2608 palette_blue[k] = (val << 8) | val;
2609 }
2610 palette_cmap.len = 16;
2611 palette_cmap.start = 0;
2612 /*
2613 * If framebuffer is capable of less than 16 colors,
2614 * use default palette of fbcon.
2615 */
2616 } else
2617 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2618
2619 fb_set_cmap(&palette_cmap, info);
2620 }
2621
fbcon_screen_pos(const struct vc_data * vc,int offset)2622 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2623 {
2624 return (u16 *) (vc->vc_origin + offset);
2625 }
2626
fbcon_getxy(struct vc_data * vc,unsigned long pos,int * px,int * py)2627 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2628 int *px, int *py)
2629 {
2630 unsigned long ret;
2631 int x, y;
2632
2633 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2634 unsigned long offset = (pos - vc->vc_origin) / 2;
2635
2636 x = offset % vc->vc_cols;
2637 y = offset / vc->vc_cols;
2638 ret = pos + (vc->vc_cols - x) * 2;
2639 } else {
2640 /* Should not happen */
2641 x = y = 0;
2642 ret = vc->vc_origin;
2643 }
2644 if (px)
2645 *px = x;
2646 if (py)
2647 *py = y;
2648 return ret;
2649 }
2650
2651 /* As we might be inside of softback, we may work with non-contiguous buffer,
2652 that's why we have to use a separate routine. */
fbcon_invert_region(struct vc_data * vc,u16 * p,int cnt)2653 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2654 {
2655 while (cnt--) {
2656 u16 a = scr_readw(p);
2657 if (!vc->vc_can_do_color)
2658 a ^= 0x0800;
2659 else if (vc->vc_hi_font_mask == 0x100)
2660 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2661 (((a) & 0x0e00) << 4);
2662 else
2663 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2664 (((a) & 0x0700) << 4);
2665 scr_writew(a, p++);
2666 }
2667 }
2668
fbcon_suspended(struct fb_info * info)2669 void fbcon_suspended(struct fb_info *info)
2670 {
2671 struct vc_data *vc = NULL;
2672 struct fbcon_ops *ops = info->fbcon_par;
2673
2674 if (!ops || ops->currcon < 0)
2675 return;
2676 vc = vc_cons[ops->currcon].d;
2677
2678 /* Clear cursor, restore saved data */
2679 fbcon_cursor(vc, CM_ERASE);
2680 }
2681
fbcon_resumed(struct fb_info * info)2682 void fbcon_resumed(struct fb_info *info)
2683 {
2684 struct vc_data *vc;
2685 struct fbcon_ops *ops = info->fbcon_par;
2686
2687 if (!ops || ops->currcon < 0)
2688 return;
2689 vc = vc_cons[ops->currcon].d;
2690
2691 update_screen(vc);
2692 }
2693
fbcon_modechanged(struct fb_info * info)2694 static void fbcon_modechanged(struct fb_info *info)
2695 {
2696 struct fbcon_ops *ops = info->fbcon_par;
2697 struct vc_data *vc;
2698 struct fbcon_display *p;
2699 int rows, cols;
2700
2701 if (!ops || ops->currcon < 0)
2702 return;
2703 vc = vc_cons[ops->currcon].d;
2704 if (vc->vc_mode != KD_TEXT ||
2705 registered_fb[con2fb_map[ops->currcon]] != info)
2706 return;
2707
2708 p = &fb_display[vc->vc_num];
2709 set_blitting_type(vc, info);
2710
2711 if (con_is_visible(vc)) {
2712 var_to_display(p, &info->var, info);
2713 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2714 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2715 cols /= vc->vc_font.width;
2716 rows /= vc->vc_font.height;
2717 vc_resize(vc, cols, rows);
2718 updatescrollmode(p, info, vc);
2719 scrollback_max = 0;
2720 scrollback_current = 0;
2721
2722 if (!fbcon_is_inactive(vc, info)) {
2723 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2724 ops->update_start(info);
2725 }
2726
2727 fbcon_set_palette(vc, color_table);
2728 update_screen(vc);
2729 }
2730 }
2731
fbcon_set_all_vcs(struct fb_info * info)2732 static void fbcon_set_all_vcs(struct fb_info *info)
2733 {
2734 struct fbcon_ops *ops = info->fbcon_par;
2735 struct vc_data *vc;
2736 struct fbcon_display *p;
2737 int i, rows, cols, fg = -1;
2738
2739 if (!ops || ops->currcon < 0)
2740 return;
2741
2742 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2743 vc = vc_cons[i].d;
2744 if (!vc || vc->vc_mode != KD_TEXT ||
2745 registered_fb[con2fb_map[i]] != info)
2746 continue;
2747
2748 if (con_is_visible(vc)) {
2749 fg = i;
2750 continue;
2751 }
2752
2753 p = &fb_display[vc->vc_num];
2754 set_blitting_type(vc, info);
2755 var_to_display(p, &info->var, info);
2756 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2757 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2758 cols /= vc->vc_font.width;
2759 rows /= vc->vc_font.height;
2760 vc_resize(vc, cols, rows);
2761 }
2762
2763 if (fg != -1)
2764 fbcon_modechanged(info);
2765 }
2766
2767
fbcon_update_vcs(struct fb_info * info,bool all)2768 void fbcon_update_vcs(struct fb_info *info, bool all)
2769 {
2770 if (all)
2771 fbcon_set_all_vcs(info);
2772 else
2773 fbcon_modechanged(info);
2774 }
2775 EXPORT_SYMBOL(fbcon_update_vcs);
2776
2777 /* let fbcon check if it supports a new screen resolution */
fbcon_modechange_possible(struct fb_info * info,struct fb_var_screeninfo * var)2778 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
2779 {
2780 struct fbcon_ops *ops = info->fbcon_par;
2781 struct vc_data *vc;
2782 unsigned int i;
2783
2784 WARN_CONSOLE_UNLOCKED();
2785
2786 if (!ops)
2787 return 0;
2788
2789 /* prevent setting a screen size which is smaller than font size */
2790 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2791 vc = vc_cons[i].d;
2792 if (!vc || vc->vc_mode != KD_TEXT ||
2793 registered_fb[con2fb_map[i]] != info)
2794 continue;
2795
2796 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
2797 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
2798 return -EINVAL;
2799 }
2800
2801 return 0;
2802 }
2803 EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
2804
fbcon_mode_deleted(struct fb_info * info,struct fb_videomode * mode)2805 int fbcon_mode_deleted(struct fb_info *info,
2806 struct fb_videomode *mode)
2807 {
2808 struct fb_info *fb_info;
2809 struct fbcon_display *p;
2810 int i, j, found = 0;
2811
2812 /* before deletion, ensure that mode is not in use */
2813 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2814 j = con2fb_map[i];
2815 if (j == -1)
2816 continue;
2817 fb_info = registered_fb[j];
2818 if (fb_info != info)
2819 continue;
2820 p = &fb_display[i];
2821 if (!p || !p->mode)
2822 continue;
2823 if (fb_mode_is_equal(p->mode, mode)) {
2824 found = 1;
2825 break;
2826 }
2827 }
2828 return found;
2829 }
2830
2831 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
fbcon_unbind(void)2832 static void fbcon_unbind(void)
2833 {
2834 int ret;
2835
2836 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2837 fbcon_is_default);
2838
2839 if (!ret)
2840 fbcon_has_console_bind = 0;
2841 }
2842 #else
fbcon_unbind(void)2843 static inline void fbcon_unbind(void) {}
2844 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2845
2846 /* called with console_lock held */
fbcon_fb_unbind(struct fb_info * info)2847 void fbcon_fb_unbind(struct fb_info *info)
2848 {
2849 int i, new_idx = -1, ret = 0;
2850 int idx = info->node;
2851
2852 WARN_CONSOLE_UNLOCKED();
2853
2854 if (!fbcon_has_console_bind)
2855 return;
2856
2857 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2858 if (con2fb_map[i] != idx &&
2859 con2fb_map[i] != -1) {
2860 new_idx = con2fb_map[i];
2861 break;
2862 }
2863 }
2864
2865 if (new_idx != -1) {
2866 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2867 if (con2fb_map[i] == idx)
2868 set_con2fb_map(i, new_idx, 0);
2869 }
2870 } else {
2871 struct fb_info *info = registered_fb[idx];
2872
2873 /* This is sort of like set_con2fb_map, except it maps
2874 * the consoles to no device and then releases the
2875 * oldinfo to free memory and cancel the cursor blink
2876 * timer. I can imagine this just becoming part of
2877 * set_con2fb_map where new_idx is -1
2878 */
2879 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2880 if (con2fb_map[i] == idx) {
2881 con2fb_map[i] = -1;
2882 if (!search_fb_in_map(idx)) {
2883 ret = con2fb_release_oldinfo(vc_cons[i].d,
2884 info, NULL, i,
2885 idx, 0);
2886 if (ret) {
2887 con2fb_map[i] = idx;
2888 return;
2889 }
2890 }
2891 }
2892 }
2893 fbcon_unbind();
2894 }
2895 }
2896
2897 /* called with console_lock held */
fbcon_fb_unregistered(struct fb_info * info)2898 void fbcon_fb_unregistered(struct fb_info *info)
2899 {
2900 int i, idx;
2901
2902 WARN_CONSOLE_UNLOCKED();
2903
2904 if (deferred_takeover)
2905 return;
2906
2907 idx = info->node;
2908 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2909 if (con2fb_map[i] == idx)
2910 con2fb_map[i] = -1;
2911 }
2912
2913 if (idx == info_idx) {
2914 info_idx = -1;
2915
2916 for_each_registered_fb(i) {
2917 info_idx = i;
2918 break;
2919 }
2920 }
2921
2922 if (info_idx != -1) {
2923 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2924 if (con2fb_map[i] == -1)
2925 con2fb_map[i] = info_idx;
2926 }
2927 }
2928
2929 if (primary_device == idx)
2930 primary_device = -1;
2931
2932 if (!num_registered_fb)
2933 do_unregister_con_driver(&fb_con);
2934 }
2935
fbcon_remap_all(struct fb_info * info)2936 void fbcon_remap_all(struct fb_info *info)
2937 {
2938 int i, idx = info->node;
2939
2940 console_lock();
2941 if (deferred_takeover) {
2942 for (i = first_fb_vc; i <= last_fb_vc; i++)
2943 con2fb_map_boot[i] = idx;
2944 fbcon_map_override();
2945 console_unlock();
2946 return;
2947 }
2948
2949 for (i = first_fb_vc; i <= last_fb_vc; i++)
2950 set_con2fb_map(i, idx, 0);
2951
2952 if (con_is_bound(&fb_con)) {
2953 printk(KERN_INFO "fbcon: Remapping primary device, "
2954 "fb%i, to tty %i-%i\n", idx,
2955 first_fb_vc + 1, last_fb_vc + 1);
2956 info_idx = idx;
2957 }
2958 console_unlock();
2959 }
2960
2961 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
fbcon_select_primary(struct fb_info * info)2962 static void fbcon_select_primary(struct fb_info *info)
2963 {
2964 if (!map_override && primary_device == -1 &&
2965 fb_is_primary_device(info)) {
2966 int i;
2967
2968 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2969 info->fix.id, info->node);
2970 primary_device = info->node;
2971
2972 for (i = first_fb_vc; i <= last_fb_vc; i++)
2973 con2fb_map_boot[i] = primary_device;
2974
2975 if (con_is_bound(&fb_con)) {
2976 printk(KERN_INFO "fbcon: Remapping primary device, "
2977 "fb%i, to tty %i-%i\n", info->node,
2978 first_fb_vc + 1, last_fb_vc + 1);
2979 info_idx = primary_device;
2980 }
2981 }
2982
2983 }
2984 #else
fbcon_select_primary(struct fb_info * info)2985 static inline void fbcon_select_primary(struct fb_info *info)
2986 {
2987 return;
2988 }
2989 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2990
2991 /* called with console_lock held */
fbcon_fb_registered(struct fb_info * info)2992 int fbcon_fb_registered(struct fb_info *info)
2993 {
2994 int ret = 0, i, idx;
2995
2996 WARN_CONSOLE_UNLOCKED();
2997
2998 idx = info->node;
2999 fbcon_select_primary(info);
3000
3001 if (deferred_takeover) {
3002 pr_info("fbcon: Deferring console take-over\n");
3003 return 0;
3004 }
3005
3006 if (info_idx == -1) {
3007 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3008 if (con2fb_map_boot[i] == idx) {
3009 info_idx = idx;
3010 break;
3011 }
3012 }
3013
3014 if (info_idx != -1)
3015 ret = do_fbcon_takeover(1);
3016 } else {
3017 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3018 if (con2fb_map_boot[i] == idx)
3019 set_con2fb_map(i, idx, 0);
3020 }
3021 }
3022
3023 return ret;
3024 }
3025
fbcon_fb_blanked(struct fb_info * info,int blank)3026 void fbcon_fb_blanked(struct fb_info *info, int blank)
3027 {
3028 struct fbcon_ops *ops = info->fbcon_par;
3029 struct vc_data *vc;
3030
3031 if (!ops || ops->currcon < 0)
3032 return;
3033
3034 vc = vc_cons[ops->currcon].d;
3035 if (vc->vc_mode != KD_TEXT ||
3036 registered_fb[con2fb_map[ops->currcon]] != info)
3037 return;
3038
3039 if (con_is_visible(vc)) {
3040 if (blank)
3041 do_blank_screen(0);
3042 else
3043 do_unblank_screen(0);
3044 }
3045 ops->blank_state = blank;
3046 }
3047
fbcon_new_modelist(struct fb_info * info)3048 void fbcon_new_modelist(struct fb_info *info)
3049 {
3050 int i;
3051 struct vc_data *vc;
3052 struct fb_var_screeninfo var;
3053 const struct fb_videomode *mode;
3054
3055 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3056 if (registered_fb[con2fb_map[i]] != info)
3057 continue;
3058 if (!fb_display[i].mode)
3059 continue;
3060 vc = vc_cons[i].d;
3061 display_to_var(&var, &fb_display[i]);
3062 mode = fb_find_nearest_mode(fb_display[i].mode,
3063 &info->modelist);
3064 fb_videomode_to_var(&var, mode);
3065 fbcon_set_disp(info, &var, vc->vc_num);
3066 }
3067 }
3068
fbcon_get_requirement(struct fb_info * info,struct fb_blit_caps * caps)3069 void fbcon_get_requirement(struct fb_info *info,
3070 struct fb_blit_caps *caps)
3071 {
3072 struct vc_data *vc;
3073 struct fbcon_display *p;
3074
3075 if (caps->flags) {
3076 int i, charcnt;
3077
3078 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3079 vc = vc_cons[i].d;
3080 if (vc && vc->vc_mode == KD_TEXT &&
3081 info->node == con2fb_map[i]) {
3082 p = &fb_display[i];
3083 caps->x |= 1 << (vc->vc_font.width - 1);
3084 caps->y |= 1 << (vc->vc_font.height - 1);
3085 charcnt = (p->userfont) ?
3086 FNTCHARCNT(p->fontdata) : 256;
3087 if (caps->len < charcnt)
3088 caps->len = charcnt;
3089 }
3090 }
3091 } else {
3092 vc = vc_cons[fg_console].d;
3093
3094 if (vc && vc->vc_mode == KD_TEXT &&
3095 info->node == con2fb_map[fg_console]) {
3096 p = &fb_display[fg_console];
3097 caps->x = 1 << (vc->vc_font.width - 1);
3098 caps->y = 1 << (vc->vc_font.height - 1);
3099 caps->len = (p->userfont) ?
3100 FNTCHARCNT(p->fontdata) : 256;
3101 }
3102 }
3103 }
3104
fbcon_set_con2fb_map_ioctl(void __user * argp)3105 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3106 {
3107 struct fb_con2fbmap con2fb;
3108 int ret;
3109
3110 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3111 return -EFAULT;
3112 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3113 return -EINVAL;
3114 if (con2fb.framebuffer >= FB_MAX)
3115 return -EINVAL;
3116 if (!registered_fb[con2fb.framebuffer])
3117 request_module("fb%d", con2fb.framebuffer);
3118 if (!registered_fb[con2fb.framebuffer]) {
3119 return -EINVAL;
3120 }
3121
3122 console_lock();
3123 ret = set_con2fb_map(con2fb.console - 1,
3124 con2fb.framebuffer, 1);
3125 console_unlock();
3126
3127 return ret;
3128 }
3129
fbcon_get_con2fb_map_ioctl(void __user * argp)3130 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3131 {
3132 struct fb_con2fbmap con2fb;
3133
3134 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3135 return -EFAULT;
3136 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3137 return -EINVAL;
3138
3139 console_lock();
3140 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3141 console_unlock();
3142
3143 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3144 }
3145
3146 /*
3147 * The console `switch' structure for the frame buffer based console
3148 */
3149
3150 static const struct consw fb_con = {
3151 .owner = THIS_MODULE,
3152 .con_startup = fbcon_startup,
3153 .con_init = fbcon_init,
3154 .con_deinit = fbcon_deinit,
3155 .con_clear = fbcon_clear,
3156 .con_putc = fbcon_putc,
3157 .con_putcs = fbcon_putcs,
3158 .con_cursor = fbcon_cursor,
3159 .con_scroll = fbcon_scroll,
3160 .con_switch = fbcon_switch,
3161 .con_blank = fbcon_blank,
3162 .con_font_set = fbcon_set_font,
3163 .con_font_get = fbcon_get_font,
3164 .con_font_default = fbcon_set_def_font,
3165 .con_font_copy = fbcon_copy_font,
3166 .con_set_palette = fbcon_set_palette,
3167 .con_invert_region = fbcon_invert_region,
3168 .con_screen_pos = fbcon_screen_pos,
3169 .con_getxy = fbcon_getxy,
3170 .con_resize = fbcon_resize,
3171 .con_debug_enter = fbcon_debug_enter,
3172 .con_debug_leave = fbcon_debug_leave,
3173 };
3174
store_rotate(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3175 static ssize_t store_rotate(struct device *device,
3176 struct device_attribute *attr, const char *buf,
3177 size_t count)
3178 {
3179 struct fb_info *info;
3180 int rotate, idx;
3181 char **last = NULL;
3182
3183 console_lock();
3184 idx = con2fb_map[fg_console];
3185
3186 if (idx == -1 || registered_fb[idx] == NULL)
3187 goto err;
3188
3189 info = registered_fb[idx];
3190 rotate = simple_strtoul(buf, last, 0);
3191 fbcon_rotate(info, rotate);
3192 err:
3193 console_unlock();
3194 return count;
3195 }
3196
store_rotate_all(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3197 static ssize_t store_rotate_all(struct device *device,
3198 struct device_attribute *attr,const char *buf,
3199 size_t count)
3200 {
3201 struct fb_info *info;
3202 int rotate, idx;
3203 char **last = NULL;
3204
3205 console_lock();
3206 idx = con2fb_map[fg_console];
3207
3208 if (idx == -1 || registered_fb[idx] == NULL)
3209 goto err;
3210
3211 info = registered_fb[idx];
3212 rotate = simple_strtoul(buf, last, 0);
3213 fbcon_rotate_all(info, rotate);
3214 err:
3215 console_unlock();
3216 return count;
3217 }
3218
show_rotate(struct device * device,struct device_attribute * attr,char * buf)3219 static ssize_t show_rotate(struct device *device,
3220 struct device_attribute *attr,char *buf)
3221 {
3222 struct fb_info *info;
3223 int rotate = 0, idx;
3224
3225 console_lock();
3226 idx = con2fb_map[fg_console];
3227
3228 if (idx == -1 || registered_fb[idx] == NULL)
3229 goto err;
3230
3231 info = registered_fb[idx];
3232 rotate = fbcon_get_rotate(info);
3233 err:
3234 console_unlock();
3235 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3236 }
3237
show_cursor_blink(struct device * device,struct device_attribute * attr,char * buf)3238 static ssize_t show_cursor_blink(struct device *device,
3239 struct device_attribute *attr, char *buf)
3240 {
3241 struct fb_info *info;
3242 struct fbcon_ops *ops;
3243 int idx, blink = -1;
3244
3245 console_lock();
3246 idx = con2fb_map[fg_console];
3247
3248 if (idx == -1 || registered_fb[idx] == NULL)
3249 goto err;
3250
3251 info = registered_fb[idx];
3252 ops = info->fbcon_par;
3253
3254 if (!ops)
3255 goto err;
3256
3257 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3258 err:
3259 console_unlock();
3260 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3261 }
3262
store_cursor_blink(struct device * device,struct device_attribute * attr,const char * buf,size_t count)3263 static ssize_t store_cursor_blink(struct device *device,
3264 struct device_attribute *attr,
3265 const char *buf, size_t count)
3266 {
3267 struct fb_info *info;
3268 int blink, idx;
3269 char **last = NULL;
3270
3271 console_lock();
3272 idx = con2fb_map[fg_console];
3273
3274 if (idx == -1 || registered_fb[idx] == NULL)
3275 goto err;
3276
3277 info = registered_fb[idx];
3278
3279 if (!info->fbcon_par)
3280 goto err;
3281
3282 blink = simple_strtoul(buf, last, 0);
3283
3284 if (blink) {
3285 fbcon_cursor_noblink = 0;
3286 fbcon_add_cursor_timer(info);
3287 } else {
3288 fbcon_cursor_noblink = 1;
3289 fbcon_del_cursor_timer(info);
3290 }
3291
3292 err:
3293 console_unlock();
3294 return count;
3295 }
3296
3297 static struct device_attribute device_attrs[] = {
3298 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3299 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3300 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3301 store_cursor_blink),
3302 };
3303
fbcon_init_device(void)3304 static int fbcon_init_device(void)
3305 {
3306 int i, error = 0;
3307
3308 fbcon_has_sysfs = 1;
3309
3310 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3311 error = device_create_file(fbcon_device, &device_attrs[i]);
3312
3313 if (error)
3314 break;
3315 }
3316
3317 if (error) {
3318 while (--i >= 0)
3319 device_remove_file(fbcon_device, &device_attrs[i]);
3320
3321 fbcon_has_sysfs = 0;
3322 }
3323
3324 return 0;
3325 }
3326
3327 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
fbcon_register_existing_fbs(struct work_struct * work)3328 static void fbcon_register_existing_fbs(struct work_struct *work)
3329 {
3330 int i;
3331
3332 console_lock();
3333
3334 deferred_takeover = false;
3335 logo_shown = FBCON_LOGO_DONTSHOW;
3336
3337 for_each_registered_fb(i)
3338 fbcon_fb_registered(registered_fb[i]);
3339
3340 console_unlock();
3341 }
3342
3343 static struct notifier_block fbcon_output_nb;
3344 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3345
fbcon_output_notifier(struct notifier_block * nb,unsigned long action,void * data)3346 static int fbcon_output_notifier(struct notifier_block *nb,
3347 unsigned long action, void *data)
3348 {
3349 WARN_CONSOLE_UNLOCKED();
3350
3351 pr_info("fbcon: Taking over console\n");
3352
3353 dummycon_unregister_output_notifier(&fbcon_output_nb);
3354
3355 /* We may get called in atomic context */
3356 schedule_work(&fbcon_deferred_takeover_work);
3357
3358 return NOTIFY_OK;
3359 }
3360 #endif
3361
fbcon_start(void)3362 static void fbcon_start(void)
3363 {
3364 WARN_CONSOLE_UNLOCKED();
3365
3366 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3367 if (conswitchp != &dummy_con)
3368 deferred_takeover = false;
3369
3370 if (deferred_takeover) {
3371 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3372 dummycon_register_output_notifier(&fbcon_output_nb);
3373 return;
3374 }
3375 #endif
3376
3377 if (num_registered_fb) {
3378 int i;
3379
3380 for_each_registered_fb(i) {
3381 info_idx = i;
3382 break;
3383 }
3384
3385 do_fbcon_takeover(0);
3386 }
3387 }
3388
fbcon_exit(void)3389 static void fbcon_exit(void)
3390 {
3391 struct fb_info *info;
3392 int i, j, mapped;
3393
3394 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3395 if (deferred_takeover) {
3396 dummycon_unregister_output_notifier(&fbcon_output_nb);
3397 deferred_takeover = false;
3398 }
3399 #endif
3400
3401 for_each_registered_fb(i) {
3402 int pending = 0;
3403
3404 mapped = 0;
3405 info = registered_fb[i];
3406
3407 if (info->queue.func)
3408 pending = cancel_work_sync(&info->queue);
3409 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3410 "no"));
3411
3412 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3413 if (con2fb_map[j] == i) {
3414 mapped = 1;
3415 con2fb_map[j] = -1;
3416 }
3417 }
3418
3419 if (mapped) {
3420 if (info->fbops->fb_release)
3421 info->fbops->fb_release(info, 0);
3422 module_put(info->fbops->owner);
3423
3424 if (info->fbcon_par) {
3425 struct fbcon_ops *ops = info->fbcon_par;
3426
3427 fbcon_del_cursor_timer(info);
3428 kfree(ops->cursor_src);
3429 kfree(ops->cursor_state.mask);
3430 kfree(info->fbcon_par);
3431 info->fbcon_par = NULL;
3432 }
3433
3434 if (info->queue.func == fb_flashcursor)
3435 info->queue.func = NULL;
3436 }
3437 }
3438 }
3439
fb_console_init(void)3440 void __init fb_console_init(void)
3441 {
3442 int i;
3443
3444 console_lock();
3445 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3446 "fbcon");
3447
3448 if (IS_ERR(fbcon_device)) {
3449 printk(KERN_WARNING "Unable to create device "
3450 "for fbcon; errno = %ld\n",
3451 PTR_ERR(fbcon_device));
3452 fbcon_device = NULL;
3453 } else
3454 fbcon_init_device();
3455
3456 for (i = 0; i < MAX_NR_CONSOLES; i++)
3457 con2fb_map[i] = -1;
3458
3459 fbcon_start();
3460 console_unlock();
3461 }
3462
3463 #ifdef MODULE
3464
fbcon_deinit_device(void)3465 static void __exit fbcon_deinit_device(void)
3466 {
3467 int i;
3468
3469 if (fbcon_has_sysfs) {
3470 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3471 device_remove_file(fbcon_device, &device_attrs[i]);
3472
3473 fbcon_has_sysfs = 0;
3474 }
3475 }
3476
fb_console_exit(void)3477 void __exit fb_console_exit(void)
3478 {
3479 console_lock();
3480 fbcon_deinit_device();
3481 device_destroy(fb_class, MKDEV(0, 0));
3482 fbcon_exit();
3483 do_unregister_con_driver(&fb_con);
3484 console_unlock();
3485 }
3486 #endif
3487