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WIP FPC-III support
[linux/fpc-iii.git] / drivers / video / fbdev / core / fbcon.c
blobbf61598bf1c39ff4c1a6dd5bc94bb1a584ad327a
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 int first_fb_vc;
127 static 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
135 static inline void fbcon_map_override(void)
136 {
137 map_override = 1;
138 }
139 #else
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
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
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
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
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
273 static void fbcon_rotate(struct fb_info *info, u32 rotate)
274 {
275 return;
276 }
277
278 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
279 {
280 return;
281 }
282 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
283
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
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
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
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
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
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
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
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 < 0)
476 first_fb_vc = 0;
477 if (*options++ == '-')
478 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
479 fbcon_is_default = 0;
480 continue;
481 }
482
483 if (!strncmp(options, "rotate:", 7)) {
484 options += 7;
485 if (*options)
486 initial_rotation = simple_strtoul(options, &options, 0);
487 if (initial_rotation > 3)
488 initial_rotation = 0;
489 continue;
490 }
491
492 if (!strncmp(options, "margin:", 7)) {
493 options += 7;
494 if (*options)
495 margin_color = simple_strtoul(options, &options, 0);
496 continue;
497 }
498 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
499 if (!strcmp(options, "nodefer")) {
500 deferred_takeover = false;
501 continue;
502 }
503 #endif
504
505 if (!strncmp(options, "logo-pos:", 9)) {
506 options += 9;
507 if (!strcmp(options, "center"))
508 fb_center_logo = true;
509 continue;
510 }
511
512 if (!strncmp(options, "logo-count:", 11)) {
513 options += 11;
514 if (*options)
515 fb_logo_count = simple_strtol(options, &options, 0);
516 continue;
517 }
518 }
519 return 1;
520 }
521
522 __setup("fbcon=", fb_console_setup);
523 #endif
524
525 static int search_fb_in_map(int idx)
526 {
527 int i, retval = 0;
528
529 for (i = first_fb_vc; i <= last_fb_vc; i++) {
530 if (con2fb_map[i] == idx)
531 retval = 1;
532 }
533 return retval;
534 }
535
536 static int search_for_mapped_con(void)
537 {
538 int i, retval = 0;
539
540 for (i = first_fb_vc; i <= last_fb_vc; i++) {
541 if (con2fb_map[i] != -1)
542 retval = 1;
543 }
544 return retval;
545 }
546
547 static int do_fbcon_takeover(int show_logo)
548 {
549 int err, i;
550
551 if (!num_registered_fb)
552 return -ENODEV;
553
554 if (!show_logo)
555 logo_shown = FBCON_LOGO_DONTSHOW;
556
557 for (i = first_fb_vc; i <= last_fb_vc; i++)
558 con2fb_map[i] = info_idx;
559
560 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
561 fbcon_is_default);
562
563 if (err) {
564 for (i = first_fb_vc; i <= last_fb_vc; i++)
565 con2fb_map[i] = -1;
566 info_idx = -1;
567 } else {
568 fbcon_has_console_bind = 1;
569 }
570
571 return err;
572 }
573
574 #ifdef MODULE
575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
576 int cols, int rows, int new_cols, int new_rows)
577 {
578 logo_shown = FBCON_LOGO_DONTSHOW;
579 }
580 #else
581 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
582 int cols, int rows, int new_cols, int new_rows)
583 {
584 /* Need to make room for the logo */
585 struct fbcon_ops *ops = info->fbcon_par;
586 int cnt, erase = vc->vc_video_erase_char, step;
587 unsigned short *save = NULL, *r, *q;
588 int logo_height;
589
590 if (info->fbops->owner) {
591 logo_shown = FBCON_LOGO_DONTSHOW;
592 return;
593 }
594
595 /*
596 * remove underline attribute from erase character
597 * if black and white framebuffer.
598 */
599 if (fb_get_color_depth(&info->var, &info->fix) == 1)
600 erase &= ~0x400;
601 logo_height = fb_prepare_logo(info, ops->rotate);
602 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
603 q = (unsigned short *) (vc->vc_origin +
604 vc->vc_size_row * rows);
605 step = logo_lines * cols;
606 for (r = q - logo_lines * cols; r < q; r++)
607 if (scr_readw(r) != vc->vc_video_erase_char)
608 break;
609 if (r != q && new_rows >= rows + logo_lines) {
610 save = kmalloc(array3_size(logo_lines, new_cols, 2),
611 GFP_KERNEL);
612 if (save) {
613 int i = cols < new_cols ? cols : new_cols;
614 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
615 r = q - step;
616 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
617 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
618 r = q;
619 }
620 }
621 if (r == q) {
622 /* We can scroll screen down */
623 r = q - step - cols;
624 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
625 scr_memcpyw(r + step, r, vc->vc_size_row);
626 r -= cols;
627 }
628 if (!save) {
629 int lines;
630 if (vc->state.y + logo_lines >= rows)
631 lines = rows - vc->state.y - 1;
632 else
633 lines = logo_lines;
634 vc->state.y += lines;
635 vc->vc_pos += lines * vc->vc_size_row;
636 }
637 }
638 scr_memsetw((unsigned short *) vc->vc_origin,
639 erase,
640 vc->vc_size_row * logo_lines);
641
642 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
643 fbcon_clear_margins(vc, 0);
644 update_screen(vc);
645 }
646
647 if (save) {
648 q = (unsigned short *) (vc->vc_origin +
649 vc->vc_size_row *
650 rows);
651 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
652 vc->state.y += logo_lines;
653 vc->vc_pos += logo_lines * vc->vc_size_row;
654 kfree(save);
655 }
656
657 if (logo_shown == FBCON_LOGO_DONTSHOW)
658 return;
659
660 if (logo_lines > vc->vc_bottom) {
661 logo_shown = FBCON_LOGO_CANSHOW;
662 printk(KERN_INFO
663 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
664 } else {
665 logo_shown = FBCON_LOGO_DRAW;
666 vc->vc_top = logo_lines;
667 }
668 }
669 #endif /* MODULE */
670
671 #ifdef CONFIG_FB_TILEBLITTING
672 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
673 {
674 struct fbcon_ops *ops = info->fbcon_par;
675
676 ops->p = &fb_display[vc->vc_num];
677
678 if ((info->flags & FBINFO_MISC_TILEBLITTING))
679 fbcon_set_tileops(vc, info);
680 else {
681 fbcon_set_rotation(info);
682 fbcon_set_bitops(ops);
683 }
684 }
685
686 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
687 {
688 int err = 0;
689
690 if (info->flags & FBINFO_MISC_TILEBLITTING &&
691 info->tileops->fb_get_tilemax(info) < charcount)
692 err = 1;
693
694 return err;
695 }
696 #else
697 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
698 {
699 struct fbcon_ops *ops = info->fbcon_par;
700
701 info->flags &= ~FBINFO_MISC_TILEBLITTING;
702 ops->p = &fb_display[vc->vc_num];
703 fbcon_set_rotation(info);
704 fbcon_set_bitops(ops);
705 }
706
707 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
708 {
709 return 0;
710 }
711
712 #endif /* CONFIG_MISC_TILEBLITTING */
713
714
715 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
716 int unit, int oldidx)
717 {
718 struct fbcon_ops *ops = NULL;
719 int err = 0;
720
721 if (!try_module_get(info->fbops->owner))
722 err = -ENODEV;
723
724 if (!err && info->fbops->fb_open &&
725 info->fbops->fb_open(info, 0))
726 err = -ENODEV;
727
728 if (!err) {
729 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
730 if (!ops)
731 err = -ENOMEM;
732 }
733
734 if (!err) {
735 ops->cur_blink_jiffies = HZ / 5;
736 ops->info = info;
737 info->fbcon_par = ops;
738
739 if (vc)
740 set_blitting_type(vc, info);
741 }
742
743 if (err) {
744 con2fb_map[unit] = oldidx;
745 module_put(info->fbops->owner);
746 }
747
748 return err;
749 }
750
751 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
752 struct fb_info *newinfo, int unit,
753 int oldidx, int found)
754 {
755 struct fbcon_ops *ops = oldinfo->fbcon_par;
756 int err = 0, ret;
757
758 if (oldinfo->fbops->fb_release &&
759 oldinfo->fbops->fb_release(oldinfo, 0)) {
760 con2fb_map[unit] = oldidx;
761 if (!found && newinfo->fbops->fb_release)
762 newinfo->fbops->fb_release(newinfo, 0);
763 if (!found)
764 module_put(newinfo->fbops->owner);
765 err = -ENODEV;
766 }
767
768 if (!err) {
769 fbcon_del_cursor_timer(oldinfo);
770 kfree(ops->cursor_state.mask);
771 kfree(ops->cursor_data);
772 kfree(ops->cursor_src);
773 kfree(ops->fontbuffer);
774 kfree(oldinfo->fbcon_par);
775 oldinfo->fbcon_par = NULL;
776 module_put(oldinfo->fbops->owner);
777 /*
778 If oldinfo and newinfo are driving the same hardware,
779 the fb_release() method of oldinfo may attempt to
780 restore the hardware state. This will leave the
781 newinfo in an undefined state. Thus, a call to
782 fb_set_par() may be needed for the newinfo.
783 */
784 if (newinfo && newinfo->fbops->fb_set_par) {
785 ret = newinfo->fbops->fb_set_par(newinfo);
786
787 if (ret)
788 printk(KERN_ERR "con2fb_release_oldinfo: "
789 "detected unhandled fb_set_par error, "
790 "error code %d\n", ret);
791 }
792 }
793
794 return err;
795 }
796
797 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
798 int unit, int show_logo)
799 {
800 struct fbcon_ops *ops = info->fbcon_par;
801 int ret;
802
803 ops->currcon = fg_console;
804
805 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
806 ret = info->fbops->fb_set_par(info);
807
808 if (ret)
809 printk(KERN_ERR "con2fb_init_display: detected "
810 "unhandled fb_set_par error, "
811 "error code %d\n", ret);
812 }
813
814 ops->flags |= FBCON_FLAGS_INIT;
815 ops->graphics = 0;
816 fbcon_set_disp(info, &info->var, unit);
817
818 if (show_logo) {
819 struct vc_data *fg_vc = vc_cons[fg_console].d;
820 struct fb_info *fg_info =
821 registered_fb[con2fb_map[fg_console]];
822
823 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
824 fg_vc->vc_rows, fg_vc->vc_cols,
825 fg_vc->vc_rows);
826 }
827
828 update_screen(vc_cons[fg_console].d);
829 }
830
831 /**
832 * set_con2fb_map - map console to frame buffer device
833 * @unit: virtual console number to map
834 * @newidx: frame buffer index to map virtual console to
835 * @user: user request
836 *
837 * Maps a virtual console @unit to a frame buffer device
838 * @newidx.
839 *
840 * This should be called with the console lock held.
841 */
842 static int set_con2fb_map(int unit, int newidx, int user)
843 {
844 struct vc_data *vc = vc_cons[unit].d;
845 int oldidx = con2fb_map[unit];
846 struct fb_info *info = registered_fb[newidx];
847 struct fb_info *oldinfo = NULL;
848 int found, err = 0;
849
850 WARN_CONSOLE_UNLOCKED();
851
852 if (oldidx == newidx)
853 return 0;
854
855 if (!info)
856 return -EINVAL;
857
858 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
859 info_idx = newidx;
860 return do_fbcon_takeover(0);
861 }
862
863 if (oldidx != -1)
864 oldinfo = registered_fb[oldidx];
865
866 found = search_fb_in_map(newidx);
867
868 con2fb_map[unit] = newidx;
869 if (!err && !found)
870 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
871
872 /*
873 * If old fb is not mapped to any of the consoles,
874 * fbcon should release it.
875 */
876 if (!err && oldinfo && !search_fb_in_map(oldidx))
877 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
878 found);
879
880 if (!err) {
881 int show_logo = (fg_console == 0 && !user &&
882 logo_shown != FBCON_LOGO_DONTSHOW);
883
884 if (!found)
885 fbcon_add_cursor_timer(info);
886 con2fb_map_boot[unit] = newidx;
887 con2fb_init_display(vc, info, unit, show_logo);
888 }
889
890 if (!search_fb_in_map(info_idx))
891 info_idx = newidx;
892
893 return err;
894 }
895
896 /*
897 * Low Level Operations
898 */
899 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
900 static int var_to_display(struct fbcon_display *disp,
901 struct fb_var_screeninfo *var,
902 struct fb_info *info)
903 {
904 disp->xres_virtual = var->xres_virtual;
905 disp->yres_virtual = var->yres_virtual;
906 disp->bits_per_pixel = var->bits_per_pixel;
907 disp->grayscale = var->grayscale;
908 disp->nonstd = var->nonstd;
909 disp->accel_flags = var->accel_flags;
910 disp->height = var->height;
911 disp->width = var->width;
912 disp->red = var->red;
913 disp->green = var->green;
914 disp->blue = var->blue;
915 disp->transp = var->transp;
916 disp->rotate = var->rotate;
917 disp->mode = fb_match_mode(var, &info->modelist);
918 if (disp->mode == NULL)
919 /* This should not happen */
920 return -EINVAL;
921 return 0;
922 }
923
924 static void display_to_var(struct fb_var_screeninfo *var,
925 struct fbcon_display *disp)
926 {
927 fb_videomode_to_var(var, disp->mode);
928 var->xres_virtual = disp->xres_virtual;
929 var->yres_virtual = disp->yres_virtual;
930 var->bits_per_pixel = disp->bits_per_pixel;
931 var->grayscale = disp->grayscale;
932 var->nonstd = disp->nonstd;
933 var->accel_flags = disp->accel_flags;
934 var->height = disp->height;
935 var->width = disp->width;
936 var->red = disp->red;
937 var->green = disp->green;
938 var->blue = disp->blue;
939 var->transp = disp->transp;
940 var->rotate = disp->rotate;
941 }
942
943 static const char *fbcon_startup(void)
944 {
945 const char *display_desc = "frame buffer device";
946 struct fbcon_display *p = &fb_display[fg_console];
947 struct vc_data *vc = vc_cons[fg_console].d;
948 const struct font_desc *font = NULL;
949 struct module *owner;
950 struct fb_info *info = NULL;
951 struct fbcon_ops *ops;
952 int rows, cols;
953
954 /*
955 * If num_registered_fb is zero, this is a call for the dummy part.
956 * The frame buffer devices weren't initialized yet.
957 */
958 if (!num_registered_fb || info_idx == -1)
959 return display_desc;
960 /*
961 * Instead of blindly using registered_fb[0], we use info_idx, set by
962 * fb_console_init();
963 */
964 info = registered_fb[info_idx];
965 if (!info)
966 return NULL;
967
968 owner = info->fbops->owner;
969 if (!try_module_get(owner))
970 return NULL;
971 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
972 module_put(owner);
973 return NULL;
974 }
975
976 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
977 if (!ops) {
978 module_put(owner);
979 return NULL;
980 }
981
982 ops->currcon = -1;
983 ops->graphics = 1;
984 ops->cur_rotate = -1;
985 ops->cur_blink_jiffies = HZ / 5;
986 ops->info = info;
987 info->fbcon_par = ops;
988
989 p->con_rotate = initial_rotation;
990 if (p->con_rotate == -1)
991 p->con_rotate = info->fbcon_rotate_hint;
992 if (p->con_rotate == -1)
993 p->con_rotate = FB_ROTATE_UR;
994
995 set_blitting_type(vc, info);
996
997 /* Setup default font */
998 if (!p->fontdata && !vc->vc_font.data) {
999 if (!fontname[0] || !(font = find_font(fontname)))
1000 font = get_default_font(info->var.xres,
1001 info->var.yres,
1002 info->pixmap.blit_x,
1003 info->pixmap.blit_y);
1004 vc->vc_font.width = font->width;
1005 vc->vc_font.height = font->height;
1006 vc->vc_font.data = (void *)(p->fontdata = font->data);
1007 vc->vc_font.charcount = font->charcount;
1008 } else {
1009 p->fontdata = vc->vc_font.data;
1010 }
1011
1012 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1013 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1014 cols /= vc->vc_font.width;
1015 rows /= vc->vc_font.height;
1016 vc_resize(vc, cols, rows);
1017
1018 DPRINTK("mode: %s\n", info->fix.id);
1019 DPRINTK("visual: %d\n", info->fix.visual);
1020 DPRINTK("res: %dx%d-%d\n", info->var.xres,
1021 info->var.yres,
1022 info->var.bits_per_pixel);
1023
1024 fbcon_add_cursor_timer(info);
1025 return display_desc;
1026 }
1027
1028 static void fbcon_init(struct vc_data *vc, int init)
1029 {
1030 struct fb_info *info;
1031 struct fbcon_ops *ops;
1032 struct vc_data **default_mode = vc->vc_display_fg;
1033 struct vc_data *svc = *default_mode;
1034 struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1035 int logo = 1, new_rows, new_cols, rows, cols;
1036 int ret;
1037
1038 if (WARN_ON(info_idx == -1))
1039 return;
1040
1041 if (con2fb_map[vc->vc_num] == -1)
1042 con2fb_map[vc->vc_num] = info_idx;
1043
1044 info = registered_fb[con2fb_map[vc->vc_num]];
1045
1046 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1047 logo_shown = FBCON_LOGO_DONTSHOW;
1048
1049 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1050 (info->fix.type == FB_TYPE_TEXT))
1051 logo = 0;
1052
1053 if (var_to_display(p, &info->var, info))
1054 return;
1055
1056 if (!info->fbcon_par)
1057 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1058
1059 /* If we are not the first console on this
1060 fb, copy the font from that console */
1061 t = &fb_display[fg_console];
1062 if (!p->fontdata) {
1063 if (t->fontdata) {
1064 struct vc_data *fvc = vc_cons[fg_console].d;
1065
1066 vc->vc_font.data = (void *)(p->fontdata =
1067 fvc->vc_font.data);
1068 vc->vc_font.width = fvc->vc_font.width;
1069 vc->vc_font.height = fvc->vc_font.height;
1070 vc->vc_font.charcount = fvc->vc_font.charcount;
1071 p->userfont = t->userfont;
1072
1073 if (p->userfont)
1074 REFCOUNT(p->fontdata)++;
1075 } else {
1076 const struct font_desc *font = NULL;
1077
1078 if (!fontname[0] || !(font = find_font(fontname)))
1079 font = get_default_font(info->var.xres,
1080 info->var.yres,
1081 info->pixmap.blit_x,
1082 info->pixmap.blit_y);
1083 vc->vc_font.width = font->width;
1084 vc->vc_font.height = font->height;
1085 vc->vc_font.data = (void *)(p->fontdata = font->data);
1086 vc->vc_font.charcount = font->charcount;
1087 }
1088 }
1089
1090 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1091 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1092 if (vc->vc_font.charcount == 256) {
1093 vc->vc_hi_font_mask = 0;
1094 } else {
1095 vc->vc_hi_font_mask = 0x100;
1096 if (vc->vc_can_do_color)
1097 vc->vc_complement_mask <<= 1;
1098 }
1099
1100 if (!*svc->vc_uni_pagedir_loc)
1101 con_set_default_unimap(svc);
1102 if (!*vc->vc_uni_pagedir_loc)
1103 con_copy_unimap(vc, svc);
1104
1105 ops = info->fbcon_par;
1106 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1107
1108 p->con_rotate = initial_rotation;
1109 if (p->con_rotate == -1)
1110 p->con_rotate = info->fbcon_rotate_hint;
1111 if (p->con_rotate == -1)
1112 p->con_rotate = FB_ROTATE_UR;
1113
1114 set_blitting_type(vc, info);
1115
1116 cols = vc->vc_cols;
1117 rows = vc->vc_rows;
1118 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1119 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1120 new_cols /= vc->vc_font.width;
1121 new_rows /= vc->vc_font.height;
1122
1123 /*
1124 * We must always set the mode. The mode of the previous console
1125 * driver could be in the same resolution but we are using different
1126 * hardware so we have to initialize the hardware.
1127 *
1128 * We need to do it in fbcon_init() to prevent screen corruption.
1129 */
1130 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1131 if (info->fbops->fb_set_par &&
1132 !(ops->flags & FBCON_FLAGS_INIT)) {
1133 ret = info->fbops->fb_set_par(info);
1134
1135 if (ret)
1136 printk(KERN_ERR "fbcon_init: detected "
1137 "unhandled fb_set_par error, "
1138 "error code %d\n", ret);
1139 }
1140
1141 ops->flags |= FBCON_FLAGS_INIT;
1142 }
1143
1144 ops->graphics = 0;
1145
1146 /*
1147 * No more hw acceleration for fbcon.
1148 *
1149 * FIXME: Garbage collect all the now dead code after sufficient time
1150 * has passed.
1151 */
1152 p->scrollmode = SCROLL_REDRAW;
1153
1154 /*
1155 * ++guenther: console.c:vc_allocate() relies on initializing
1156 * vc_{cols,rows}, but we must not set those if we are only
1157 * resizing the console.
1158 */
1159 if (init) {
1160 vc->vc_cols = new_cols;
1161 vc->vc_rows = new_rows;
1162 } else
1163 vc_resize(vc, new_cols, new_rows);
1164
1165 if (logo)
1166 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1167
1168 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1169 ops->rotate = FB_ROTATE_UR;
1170 set_blitting_type(vc, info);
1171 }
1172
1173 ops->p = &fb_display[fg_console];
1174 }
1175
1176 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1177 {
1178 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1179 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1180 p->fontdata = NULL;
1181 p->userfont = 0;
1182 }
1183
1184 static void set_vc_hi_font(struct vc_data *vc, bool set);
1185
1186 static void fbcon_deinit(struct vc_data *vc)
1187 {
1188 struct fbcon_display *p = &fb_display[vc->vc_num];
1189 struct fb_info *info;
1190 struct fbcon_ops *ops;
1191 int idx;
1192 bool free_font = true;
1193
1194 idx = con2fb_map[vc->vc_num];
1195
1196 if (idx == -1)
1197 goto finished;
1198
1199 info = registered_fb[idx];
1200
1201 if (!info)
1202 goto finished;
1203
1204 if (info->flags & FBINFO_MISC_FIRMWARE)
1205 free_font = false;
1206 ops = info->fbcon_par;
1207
1208 if (!ops)
1209 goto finished;
1210
1211 if (con_is_visible(vc))
1212 fbcon_del_cursor_timer(info);
1213
1214 ops->flags &= ~FBCON_FLAGS_INIT;
1215 finished:
1216
1217 fbcon_free_font(p, free_font);
1218 if (free_font)
1219 vc->vc_font.data = NULL;
1220
1221 if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1222 set_vc_hi_font(vc, false);
1223
1224 if (!con_is_bound(&fb_con))
1225 fbcon_exit();
1226
1227 if (vc->vc_num == logo_shown)
1228 logo_shown = FBCON_LOGO_CANSHOW;
1229
1230 return;
1231 }
1232
1233 /* ====================================================================== */
1234
1235 /* fbcon_XXX routines - interface used by the world
1236 *
1237 * This system is now divided into two levels because of complications
1238 * caused by hardware scrolling. Top level functions:
1239 *
1240 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1241 *
1242 * handles y values in range [0, scr_height-1] that correspond to real
1243 * screen positions. y_wrap shift means that first line of bitmap may be
1244 * anywhere on this display. These functions convert lineoffsets to
1245 * bitmap offsets and deal with the wrap-around case by splitting blits.
1246 *
1247 * fbcon_bmove_physical_8() -- These functions fast implementations
1248 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1249 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1250 *
1251 * WARNING:
1252 *
1253 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1254 * Implies should only really hardware scroll in rows. Only reason for
1255 * restriction is simplicity & efficiency at the moment.
1256 */
1257
1258 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1259 int width)
1260 {
1261 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1262 struct fbcon_ops *ops = info->fbcon_par;
1263
1264 struct fbcon_display *p = &fb_display[vc->vc_num];
1265 u_int y_break;
1266
1267 if (fbcon_is_inactive(vc, info))
1268 return;
1269
1270 if (!height || !width)
1271 return;
1272
1273 if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1274 vc->vc_top = 0;
1275 /*
1276 * If the font dimensions are not an integral of the display
1277 * dimensions then the ops->clear below won't end up clearing
1278 * the margins. Call clear_margins here in case the logo
1279 * bitmap stretched into the margin area.
1280 */
1281 fbcon_clear_margins(vc, 0);
1282 }
1283
1284 /* Split blits that cross physical y_wrap boundary */
1285
1286 y_break = p->vrows - p->yscroll;
1287 if (sy < y_break && sy + height - 1 >= y_break) {
1288 u_int b = y_break - sy;
1289 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1290 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1291 width);
1292 } else
1293 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1294 }
1295
1296 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1297 int count, int ypos, int xpos)
1298 {
1299 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1300 struct fbcon_display *p = &fb_display[vc->vc_num];
1301 struct fbcon_ops *ops = info->fbcon_par;
1302
1303 if (!fbcon_is_inactive(vc, info))
1304 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1305 get_color(vc, info, scr_readw(s), 1),
1306 get_color(vc, info, scr_readw(s), 0));
1307 }
1308
1309 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1310 {
1311 unsigned short chr;
1312
1313 scr_writew(c, &chr);
1314 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1315 }
1316
1317 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1318 {
1319 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1320 struct fbcon_ops *ops = info->fbcon_par;
1321
1322 if (!fbcon_is_inactive(vc, info))
1323 ops->clear_margins(vc, info, margin_color, bottom_only);
1324 }
1325
1326 static void fbcon_cursor(struct vc_data *vc, int mode)
1327 {
1328 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1329 struct fbcon_ops *ops = info->fbcon_par;
1330 int c = scr_readw((u16 *) vc->vc_pos);
1331
1332 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1333
1334 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1335 return;
1336
1337 if (vc->vc_cursor_type & CUR_SW)
1338 fbcon_del_cursor_timer(info);
1339 else
1340 fbcon_add_cursor_timer(info);
1341
1342 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1343
1344 ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1345 get_color(vc, info, c, 0));
1346 }
1347
1348 static int scrollback_phys_max = 0;
1349 static int scrollback_max = 0;
1350 static int scrollback_current = 0;
1351
1352 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1353 int unit)
1354 {
1355 struct fbcon_display *p, *t;
1356 struct vc_data **default_mode, *vc;
1357 struct vc_data *svc;
1358 struct fbcon_ops *ops = info->fbcon_par;
1359 int rows, cols;
1360
1361 p = &fb_display[unit];
1362
1363 if (var_to_display(p, var, info))
1364 return;
1365
1366 vc = vc_cons[unit].d;
1367
1368 if (!vc)
1369 return;
1370
1371 default_mode = vc->vc_display_fg;
1372 svc = *default_mode;
1373 t = &fb_display[svc->vc_num];
1374
1375 if (!vc->vc_font.data) {
1376 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1377 vc->vc_font.width = (*default_mode)->vc_font.width;
1378 vc->vc_font.height = (*default_mode)->vc_font.height;
1379 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1380 p->userfont = t->userfont;
1381 if (p->userfont)
1382 REFCOUNT(p->fontdata)++;
1383 }
1384
1385 var->activate = FB_ACTIVATE_NOW;
1386 info->var.activate = var->activate;
1387 var->yoffset = info->var.yoffset;
1388 var->xoffset = info->var.xoffset;
1389 fb_set_var(info, var);
1390 ops->var = info->var;
1391 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1392 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1393 if (vc->vc_font.charcount == 256) {
1394 vc->vc_hi_font_mask = 0;
1395 } else {
1396 vc->vc_hi_font_mask = 0x100;
1397 if (vc->vc_can_do_color)
1398 vc->vc_complement_mask <<= 1;
1399 }
1400
1401 if (!*svc->vc_uni_pagedir_loc)
1402 con_set_default_unimap(svc);
1403 if (!*vc->vc_uni_pagedir_loc)
1404 con_copy_unimap(vc, svc);
1405
1406 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1407 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1408 cols /= vc->vc_font.width;
1409 rows /= vc->vc_font.height;
1410 vc_resize(vc, cols, rows);
1411
1412 if (con_is_visible(vc)) {
1413 update_screen(vc);
1414 }
1415 }
1416
1417 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1418 {
1419 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1420 struct fbcon_ops *ops = info->fbcon_par;
1421 struct fbcon_display *p = &fb_display[vc->vc_num];
1422
1423 p->yscroll += count;
1424 if (p->yscroll >= p->vrows) /* Deal with wrap */
1425 p->yscroll -= p->vrows;
1426 ops->var.xoffset = 0;
1427 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1428 ops->var.vmode |= FB_VMODE_YWRAP;
1429 ops->update_start(info);
1430 scrollback_max += count;
1431 if (scrollback_max > scrollback_phys_max)
1432 scrollback_max = scrollback_phys_max;
1433 scrollback_current = 0;
1434 }
1435
1436 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1437 {
1438 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1439 struct fbcon_ops *ops = info->fbcon_par;
1440 struct fbcon_display *p = &fb_display[vc->vc_num];
1441
1442 p->yscroll -= count;
1443 if (p->yscroll < 0) /* Deal with wrap */
1444 p->yscroll += p->vrows;
1445 ops->var.xoffset = 0;
1446 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1447 ops->var.vmode |= FB_VMODE_YWRAP;
1448 ops->update_start(info);
1449 scrollback_max -= count;
1450 if (scrollback_max < 0)
1451 scrollback_max = 0;
1452 scrollback_current = 0;
1453 }
1454
1455 static __inline__ void ypan_up(struct vc_data *vc, int count)
1456 {
1457 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1458 struct fbcon_display *p = &fb_display[vc->vc_num];
1459 struct fbcon_ops *ops = info->fbcon_par;
1460
1461 p->yscroll += count;
1462 if (p->yscroll > p->vrows - vc->vc_rows) {
1463 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1464 0, 0, 0, vc->vc_rows, vc->vc_cols);
1465 p->yscroll -= p->vrows - vc->vc_rows;
1466 }
1467
1468 ops->var.xoffset = 0;
1469 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1470 ops->var.vmode &= ~FB_VMODE_YWRAP;
1471 ops->update_start(info);
1472 fbcon_clear_margins(vc, 1);
1473 scrollback_max += count;
1474 if (scrollback_max > scrollback_phys_max)
1475 scrollback_max = scrollback_phys_max;
1476 scrollback_current = 0;
1477 }
1478
1479 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1480 {
1481 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1482 struct fbcon_ops *ops = info->fbcon_par;
1483 struct fbcon_display *p = &fb_display[vc->vc_num];
1484
1485 p->yscroll += count;
1486
1487 if (p->yscroll > p->vrows - vc->vc_rows) {
1488 p->yscroll -= p->vrows - vc->vc_rows;
1489 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1490 }
1491
1492 ops->var.xoffset = 0;
1493 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1494 ops->var.vmode &= ~FB_VMODE_YWRAP;
1495 ops->update_start(info);
1496 fbcon_clear_margins(vc, 1);
1497 scrollback_max += count;
1498 if (scrollback_max > scrollback_phys_max)
1499 scrollback_max = scrollback_phys_max;
1500 scrollback_current = 0;
1501 }
1502
1503 static __inline__ void ypan_down(struct vc_data *vc, int count)
1504 {
1505 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1506 struct fbcon_display *p = &fb_display[vc->vc_num];
1507 struct fbcon_ops *ops = info->fbcon_par;
1508
1509 p->yscroll -= count;
1510 if (p->yscroll < 0) {
1511 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1512 0, vc->vc_rows, vc->vc_cols);
1513 p->yscroll += p->vrows - vc->vc_rows;
1514 }
1515
1516 ops->var.xoffset = 0;
1517 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1518 ops->var.vmode &= ~FB_VMODE_YWRAP;
1519 ops->update_start(info);
1520 fbcon_clear_margins(vc, 1);
1521 scrollback_max -= count;
1522 if (scrollback_max < 0)
1523 scrollback_max = 0;
1524 scrollback_current = 0;
1525 }
1526
1527 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1528 {
1529 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1530 struct fbcon_ops *ops = info->fbcon_par;
1531 struct fbcon_display *p = &fb_display[vc->vc_num];
1532
1533 p->yscroll -= count;
1534
1535 if (p->yscroll < 0) {
1536 p->yscroll += p->vrows - vc->vc_rows;
1537 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1538 }
1539
1540 ops->var.xoffset = 0;
1541 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1542 ops->var.vmode &= ~FB_VMODE_YWRAP;
1543 ops->update_start(info);
1544 fbcon_clear_margins(vc, 1);
1545 scrollback_max -= count;
1546 if (scrollback_max < 0)
1547 scrollback_max = 0;
1548 scrollback_current = 0;
1549 }
1550
1551 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1552 int line, int count, int dy)
1553 {
1554 unsigned short *s = (unsigned short *)
1555 (vc->vc_origin + vc->vc_size_row * line);
1556
1557 while (count--) {
1558 unsigned short *start = s;
1559 unsigned short *le = advance_row(s, 1);
1560 unsigned short c;
1561 int x = 0;
1562 unsigned short attr = 1;
1563
1564 do {
1565 c = scr_readw(s);
1566 if (attr != (c & 0xff00)) {
1567 attr = c & 0xff00;
1568 if (s > start) {
1569 fbcon_putcs(vc, start, s - start,
1570 dy, x);
1571 x += s - start;
1572 start = s;
1573 }
1574 }
1575 console_conditional_schedule();
1576 s++;
1577 } while (s < le);
1578 if (s > start)
1579 fbcon_putcs(vc, start, s - start, dy, x);
1580 console_conditional_schedule();
1581 dy++;
1582 }
1583 }
1584
1585 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1586 struct fbcon_display *p, int line, int count, int ycount)
1587 {
1588 int offset = ycount * vc->vc_cols;
1589 unsigned short *d = (unsigned short *)
1590 (vc->vc_origin + vc->vc_size_row * line);
1591 unsigned short *s = d + offset;
1592 struct fbcon_ops *ops = info->fbcon_par;
1593
1594 while (count--) {
1595 unsigned short *start = s;
1596 unsigned short *le = advance_row(s, 1);
1597 unsigned short c;
1598 int x = 0;
1599
1600 do {
1601 c = scr_readw(s);
1602
1603 if (c == scr_readw(d)) {
1604 if (s > start) {
1605 ops->bmove(vc, info, line + ycount, x,
1606 line, x, 1, s-start);
1607 x += s - start + 1;
1608 start = s + 1;
1609 } else {
1610 x++;
1611 start++;
1612 }
1613 }
1614
1615 scr_writew(c, d);
1616 console_conditional_schedule();
1617 s++;
1618 d++;
1619 } while (s < le);
1620 if (s > start)
1621 ops->bmove(vc, info, line + ycount, x, line, x, 1,
1622 s-start);
1623 console_conditional_schedule();
1624 if (ycount > 0)
1625 line++;
1626 else {
1627 line--;
1628 /* NOTE: We subtract two lines from these pointers */
1629 s -= vc->vc_size_row;
1630 d -= vc->vc_size_row;
1631 }
1632 }
1633 }
1634
1635 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1636 int line, int count, int offset)
1637 {
1638 unsigned short *d = (unsigned short *)
1639 (vc->vc_origin + vc->vc_size_row * line);
1640 unsigned short *s = d + offset;
1641
1642 while (count--) {
1643 unsigned short *start = s;
1644 unsigned short *le = advance_row(s, 1);
1645 unsigned short c;
1646 int x = 0;
1647 unsigned short attr = 1;
1648
1649 do {
1650 c = scr_readw(s);
1651 if (attr != (c & 0xff00)) {
1652 attr = c & 0xff00;
1653 if (s > start) {
1654 fbcon_putcs(vc, start, s - start,
1655 line, x);
1656 x += s - start;
1657 start = s;
1658 }
1659 }
1660 if (c == scr_readw(d)) {
1661 if (s > start) {
1662 fbcon_putcs(vc, start, s - start,
1663 line, x);
1664 x += s - start + 1;
1665 start = s + 1;
1666 } else {
1667 x++;
1668 start++;
1669 }
1670 }
1671 scr_writew(c, d);
1672 console_conditional_schedule();
1673 s++;
1674 d++;
1675 } while (s < le);
1676 if (s > start)
1677 fbcon_putcs(vc, start, s - start, line, x);
1678 console_conditional_schedule();
1679 if (offset > 0)
1680 line++;
1681 else {
1682 line--;
1683 /* NOTE: We subtract two lines from these pointers */
1684 s -= vc->vc_size_row;
1685 d -= vc->vc_size_row;
1686 }
1687 }
1688 }
1689
1690 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1691 enum con_scroll dir, unsigned int count)
1692 {
1693 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1694 struct fbcon_display *p = &fb_display[vc->vc_num];
1695 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1696
1697 if (fbcon_is_inactive(vc, info))
1698 return true;
1699
1700 fbcon_cursor(vc, CM_ERASE);
1701
1702 /*
1703 * ++Geert: Only use ywrap/ypan if the console is in text mode
1704 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1705 * whole screen (prevents flicker).
1706 */
1707
1708 switch (dir) {
1709 case SM_UP:
1710 if (count > vc->vc_rows) /* Maximum realistic size */
1711 count = vc->vc_rows;
1712 if (logo_shown >= 0)
1713 goto redraw_up;
1714 switch (p->scrollmode) {
1715 case SCROLL_MOVE:
1716 fbcon_redraw_blit(vc, info, p, t, b - t - count,
1717 count);
1718 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1719 scr_memsetw((unsigned short *) (vc->vc_origin +
1720 vc->vc_size_row *
1721 (b - count)),
1722 vc->vc_video_erase_char,
1723 vc->vc_size_row * count);
1724 return true;
1725
1726 case SCROLL_WRAP_MOVE:
1727 if (b - t - count > 3 * vc->vc_rows >> 2) {
1728 if (t > 0)
1729 fbcon_bmove(vc, 0, 0, count, 0, t,
1730 vc->vc_cols);
1731 ywrap_up(vc, count);
1732 if (vc->vc_rows - b > 0)
1733 fbcon_bmove(vc, b - count, 0, b, 0,
1734 vc->vc_rows - b,
1735 vc->vc_cols);
1736 } else if (info->flags & FBINFO_READS_FAST)
1737 fbcon_bmove(vc, t + count, 0, t, 0,
1738 b - t - count, vc->vc_cols);
1739 else
1740 goto redraw_up;
1741 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1742 break;
1743
1744 case SCROLL_PAN_REDRAW:
1745 if ((p->yscroll + count <=
1746 2 * (p->vrows - vc->vc_rows))
1747 && ((!scroll_partial && (b - t == vc->vc_rows))
1748 || (scroll_partial
1749 && (b - t - count >
1750 3 * vc->vc_rows >> 2)))) {
1751 if (t > 0)
1752 fbcon_redraw_move(vc, p, 0, t, count);
1753 ypan_up_redraw(vc, t, count);
1754 if (vc->vc_rows - b > 0)
1755 fbcon_redraw_move(vc, p, b,
1756 vc->vc_rows - b, b);
1757 } else
1758 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1759 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1760 break;
1761
1762 case SCROLL_PAN_MOVE:
1763 if ((p->yscroll + count <=
1764 2 * (p->vrows - vc->vc_rows))
1765 && ((!scroll_partial && (b - t == vc->vc_rows))
1766 || (scroll_partial
1767 && (b - t - count >
1768 3 * vc->vc_rows >> 2)))) {
1769 if (t > 0)
1770 fbcon_bmove(vc, 0, 0, count, 0, t,
1771 vc->vc_cols);
1772 ypan_up(vc, count);
1773 if (vc->vc_rows - b > 0)
1774 fbcon_bmove(vc, b - count, 0, b, 0,
1775 vc->vc_rows - b,
1776 vc->vc_cols);
1777 } else if (info->flags & FBINFO_READS_FAST)
1778 fbcon_bmove(vc, t + count, 0, t, 0,
1779 b - t - count, vc->vc_cols);
1780 else
1781 goto redraw_up;
1782 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1783 break;
1784
1785 case SCROLL_REDRAW:
1786 redraw_up:
1787 fbcon_redraw(vc, p, t, b - t - count,
1788 count * vc->vc_cols);
1789 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1790 scr_memsetw((unsigned short *) (vc->vc_origin +
1791 vc->vc_size_row *
1792 (b - count)),
1793 vc->vc_video_erase_char,
1794 vc->vc_size_row * count);
1795 return true;
1796 }
1797 break;
1798
1799 case SM_DOWN:
1800 if (count > vc->vc_rows) /* Maximum realistic size */
1801 count = vc->vc_rows;
1802 if (logo_shown >= 0)
1803 goto redraw_down;
1804 switch (p->scrollmode) {
1805 case SCROLL_MOVE:
1806 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1807 -count);
1808 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1809 scr_memsetw((unsigned short *) (vc->vc_origin +
1810 vc->vc_size_row *
1811 t),
1812 vc->vc_video_erase_char,
1813 vc->vc_size_row * count);
1814 return true;
1815
1816 case SCROLL_WRAP_MOVE:
1817 if (b - t - count > 3 * vc->vc_rows >> 2) {
1818 if (vc->vc_rows - b > 0)
1819 fbcon_bmove(vc, b, 0, b - count, 0,
1820 vc->vc_rows - b,
1821 vc->vc_cols);
1822 ywrap_down(vc, count);
1823 if (t > 0)
1824 fbcon_bmove(vc, count, 0, 0, 0, t,
1825 vc->vc_cols);
1826 } else if (info->flags & FBINFO_READS_FAST)
1827 fbcon_bmove(vc, t, 0, t + count, 0,
1828 b - t - count, vc->vc_cols);
1829 else
1830 goto redraw_down;
1831 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1832 break;
1833
1834 case SCROLL_PAN_MOVE:
1835 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1836 && ((!scroll_partial && (b - t == vc->vc_rows))
1837 || (scroll_partial
1838 && (b - t - count >
1839 3 * vc->vc_rows >> 2)))) {
1840 if (vc->vc_rows - b > 0)
1841 fbcon_bmove(vc, b, 0, b - count, 0,
1842 vc->vc_rows - b,
1843 vc->vc_cols);
1844 ypan_down(vc, count);
1845 if (t > 0)
1846 fbcon_bmove(vc, count, 0, 0, 0, t,
1847 vc->vc_cols);
1848 } else if (info->flags & FBINFO_READS_FAST)
1849 fbcon_bmove(vc, t, 0, t + count, 0,
1850 b - t - count, vc->vc_cols);
1851 else
1852 goto redraw_down;
1853 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1854 break;
1855
1856 case SCROLL_PAN_REDRAW:
1857 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1858 && ((!scroll_partial && (b - t == vc->vc_rows))
1859 || (scroll_partial
1860 && (b - t - count >
1861 3 * vc->vc_rows >> 2)))) {
1862 if (vc->vc_rows - b > 0)
1863 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1864 b - count);
1865 ypan_down_redraw(vc, t, count);
1866 if (t > 0)
1867 fbcon_redraw_move(vc, p, count, t, 0);
1868 } else
1869 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1870 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1871 break;
1872
1873 case SCROLL_REDRAW:
1874 redraw_down:
1875 fbcon_redraw(vc, p, b - 1, b - t - count,
1876 -count * vc->vc_cols);
1877 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1878 scr_memsetw((unsigned short *) (vc->vc_origin +
1879 vc->vc_size_row *
1880 t),
1881 vc->vc_video_erase_char,
1882 vc->vc_size_row * count);
1883 return true;
1884 }
1885 }
1886 return false;
1887 }
1888
1889
1890 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1891 int height, int width)
1892 {
1893 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1894 struct fbcon_display *p = &fb_display[vc->vc_num];
1895
1896 if (fbcon_is_inactive(vc, info))
1897 return;
1898
1899 if (!width || !height)
1900 return;
1901
1902 /* Split blits that cross physical y_wrap case.
1903 * Pathological case involves 4 blits, better to use recursive
1904 * code rather than unrolled case
1905 *
1906 * Recursive invocations don't need to erase the cursor over and
1907 * over again, so we use fbcon_bmove_rec()
1908 */
1909 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1910 p->vrows - p->yscroll);
1911 }
1912
1913 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1914 int dy, int dx, int height, int width, u_int y_break)
1915 {
1916 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1917 struct fbcon_ops *ops = info->fbcon_par;
1918 u_int b;
1919
1920 if (sy < y_break && sy + height > y_break) {
1921 b = y_break - sy;
1922 if (dy < sy) { /* Avoid trashing self */
1923 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1924 y_break);
1925 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1926 height - b, width, y_break);
1927 } else {
1928 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1929 height - b, width, y_break);
1930 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1931 y_break);
1932 }
1933 return;
1934 }
1935
1936 if (dy < y_break && dy + height > y_break) {
1937 b = y_break - dy;
1938 if (dy < sy) { /* Avoid trashing self */
1939 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1940 y_break);
1941 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1942 height - b, width, y_break);
1943 } else {
1944 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1945 height - b, width, y_break);
1946 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1947 y_break);
1948 }
1949 return;
1950 }
1951 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1952 height, width);
1953 }
1954
1955 static void updatescrollmode(struct fbcon_display *p,
1956 struct fb_info *info,
1957 struct vc_data *vc)
1958 {
1959 struct fbcon_ops *ops = info->fbcon_par;
1960 int fh = vc->vc_font.height;
1961 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1962 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1963 info->var.xres_virtual);
1964
1965 p->vrows = vyres/fh;
1966 if (yres > (fh * (vc->vc_rows + 1)))
1967 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1968 if ((yres % fh) && (vyres % fh < yres % fh))
1969 p->vrows--;
1970 }
1971
1972 #define PITCH(w) (((w) + 7) >> 3)
1973 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
1974
1975 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1976 unsigned int height, unsigned int user)
1977 {
1978 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1979 struct fbcon_ops *ops = info->fbcon_par;
1980 struct fbcon_display *p = &fb_display[vc->vc_num];
1981 struct fb_var_screeninfo var = info->var;
1982 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
1983
1984 if (p->userfont && FNTSIZE(vc->vc_font.data)) {
1985 int size;
1986 int pitch = PITCH(vc->vc_font.width);
1987
1988 /*
1989 * If user font, ensure that a possible change to user font
1990 * height or width will not allow a font data out-of-bounds access.
1991 * NOTE: must use original charcount in calculation as font
1992 * charcount can change and cannot be used to determine the
1993 * font data allocated size.
1994 */
1995 if (pitch <= 0)
1996 return -EINVAL;
1997 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
1998 if (size > FNTSIZE(vc->vc_font.data))
1999 return -EINVAL;
2000 }
2001
2002 virt_w = FBCON_SWAP(ops->rotate, width, height);
2003 virt_h = FBCON_SWAP(ops->rotate, height, width);
2004 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2005 vc->vc_font.height);
2006 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2007 vc->vc_font.width);
2008 var.xres = virt_w * virt_fw;
2009 var.yres = virt_h * virt_fh;
2010 x_diff = info->var.xres - var.xres;
2011 y_diff = info->var.yres - var.yres;
2012 if (x_diff < 0 || x_diff > virt_fw ||
2013 y_diff < 0 || y_diff > virt_fh) {
2014 const struct fb_videomode *mode;
2015
2016 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2017 mode = fb_find_best_mode(&var, &info->modelist);
2018 if (mode == NULL)
2019 return -EINVAL;
2020 display_to_var(&var, p);
2021 fb_videomode_to_var(&var, mode);
2022
2023 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2024 return -EINVAL;
2025
2026 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2027 if (con_is_visible(vc)) {
2028 var.activate = FB_ACTIVATE_NOW |
2029 FB_ACTIVATE_FORCE;
2030 fb_set_var(info, &var);
2031 }
2032 var_to_display(p, &info->var, info);
2033 ops->var = info->var;
2034 }
2035 updatescrollmode(p, info, vc);
2036 return 0;
2037 }
2038
2039 static int fbcon_switch(struct vc_data *vc)
2040 {
2041 struct fb_info *info, *old_info = NULL;
2042 struct fbcon_ops *ops;
2043 struct fbcon_display *p = &fb_display[vc->vc_num];
2044 struct fb_var_screeninfo var;
2045 int i, ret, prev_console;
2046
2047 info = registered_fb[con2fb_map[vc->vc_num]];
2048 ops = info->fbcon_par;
2049
2050 if (logo_shown >= 0) {
2051 struct vc_data *conp2 = vc_cons[logo_shown].d;
2052
2053 if (conp2->vc_top == logo_lines
2054 && conp2->vc_bottom == conp2->vc_rows)
2055 conp2->vc_top = 0;
2056 logo_shown = FBCON_LOGO_CANSHOW;
2057 }
2058
2059 prev_console = ops->currcon;
2060 if (prev_console != -1)
2061 old_info = registered_fb[con2fb_map[prev_console]];
2062 /*
2063 * FIXME: If we have multiple fbdev's loaded, we need to
2064 * update all info->currcon. Perhaps, we can place this
2065 * in a centralized structure, but this might break some
2066 * drivers.
2067 *
2068 * info->currcon = vc->vc_num;
2069 */
2070 for_each_registered_fb(i) {
2071 if (registered_fb[i]->fbcon_par) {
2072 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2073
2074 o->currcon = vc->vc_num;
2075 }
2076 }
2077 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2078 display_to_var(&var, p);
2079 var.activate = FB_ACTIVATE_NOW;
2080
2081 /*
2082 * make sure we don't unnecessarily trip the memcmp()
2083 * in fb_set_var()
2084 */
2085 info->var.activate = var.activate;
2086 var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2087 fb_set_var(info, &var);
2088 ops->var = info->var;
2089
2090 if (old_info != NULL && (old_info != info ||
2091 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2092 if (info->fbops->fb_set_par) {
2093 ret = info->fbops->fb_set_par(info);
2094
2095 if (ret)
2096 printk(KERN_ERR "fbcon_switch: detected "
2097 "unhandled fb_set_par error, "
2098 "error code %d\n", ret);
2099 }
2100
2101 if (old_info != info)
2102 fbcon_del_cursor_timer(old_info);
2103 }
2104
2105 if (fbcon_is_inactive(vc, info) ||
2106 ops->blank_state != FB_BLANK_UNBLANK)
2107 fbcon_del_cursor_timer(info);
2108 else
2109 fbcon_add_cursor_timer(info);
2110
2111 set_blitting_type(vc, info);
2112 ops->cursor_reset = 1;
2113
2114 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2115 ops->rotate = FB_ROTATE_UR;
2116 set_blitting_type(vc, info);
2117 }
2118
2119 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2120 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2121
2122 if (vc->vc_font.charcount > 256)
2123 vc->vc_complement_mask <<= 1;
2124
2125 updatescrollmode(p, info, vc);
2126
2127 switch (p->scrollmode) {
2128 case SCROLL_WRAP_MOVE:
2129 scrollback_phys_max = p->vrows - vc->vc_rows;
2130 break;
2131 case SCROLL_PAN_MOVE:
2132 case SCROLL_PAN_REDRAW:
2133 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2134 if (scrollback_phys_max < 0)
2135 scrollback_phys_max = 0;
2136 break;
2137 default:
2138 scrollback_phys_max = 0;
2139 break;
2140 }
2141
2142 scrollback_max = 0;
2143 scrollback_current = 0;
2144
2145 if (!fbcon_is_inactive(vc, info)) {
2146 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2147 ops->update_start(info);
2148 }
2149
2150 fbcon_set_palette(vc, color_table);
2151 fbcon_clear_margins(vc, 0);
2152
2153 if (logo_shown == FBCON_LOGO_DRAW) {
2154
2155 logo_shown = fg_console;
2156 /* This is protected above by initmem_freed */
2157 fb_show_logo(info, ops->rotate);
2158 update_region(vc,
2159 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2160 vc->vc_size_row * (vc->vc_bottom -
2161 vc->vc_top) / 2);
2162 return 0;
2163 }
2164 return 1;
2165 }
2166
2167 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2168 int blank)
2169 {
2170 if (blank) {
2171 unsigned short charmask = vc->vc_hi_font_mask ?
2172 0x1ff : 0xff;
2173 unsigned short oldc;
2174
2175 oldc = vc->vc_video_erase_char;
2176 vc->vc_video_erase_char &= charmask;
2177 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2178 vc->vc_video_erase_char = oldc;
2179 }
2180 }
2181
2182 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2183 {
2184 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2185 struct fbcon_ops *ops = info->fbcon_par;
2186
2187 if (mode_switch) {
2188 struct fb_var_screeninfo var = info->var;
2189
2190 ops->graphics = 1;
2191
2192 if (!blank) {
2193 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2194 FB_ACTIVATE_KD_TEXT;
2195 fb_set_var(info, &var);
2196 ops->graphics = 0;
2197 ops->var = info->var;
2198 }
2199 }
2200
2201 if (!fbcon_is_inactive(vc, info)) {
2202 if (ops->blank_state != blank) {
2203 ops->blank_state = blank;
2204 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2205 ops->cursor_flash = (!blank);
2206
2207 if (fb_blank(info, blank))
2208 fbcon_generic_blank(vc, info, blank);
2209 }
2210
2211 if (!blank)
2212 update_screen(vc);
2213 }
2214
2215 if (mode_switch || fbcon_is_inactive(vc, info) ||
2216 ops->blank_state != FB_BLANK_UNBLANK)
2217 fbcon_del_cursor_timer(info);
2218 else
2219 fbcon_add_cursor_timer(info);
2220
2221 return 0;
2222 }
2223
2224 static int fbcon_debug_enter(struct vc_data *vc)
2225 {
2226 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2227 struct fbcon_ops *ops = info->fbcon_par;
2228
2229 ops->save_graphics = ops->graphics;
2230 ops->graphics = 0;
2231 if (info->fbops->fb_debug_enter)
2232 info->fbops->fb_debug_enter(info);
2233 fbcon_set_palette(vc, color_table);
2234 return 0;
2235 }
2236
2237 static int fbcon_debug_leave(struct vc_data *vc)
2238 {
2239 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2240 struct fbcon_ops *ops = info->fbcon_par;
2241
2242 ops->graphics = ops->save_graphics;
2243 if (info->fbops->fb_debug_leave)
2244 info->fbops->fb_debug_leave(info);
2245 return 0;
2246 }
2247
2248 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2249 {
2250 u8 *fontdata = vc->vc_font.data;
2251 u8 *data = font->data;
2252 int i, j;
2253
2254 font->width = vc->vc_font.width;
2255 font->height = vc->vc_font.height;
2256 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2257 if (!font->data)
2258 return 0;
2259
2260 if (font->width <= 8) {
2261 j = vc->vc_font.height;
2262 if (font->charcount * j > FNTSIZE(fontdata))
2263 return -EINVAL;
2264
2265 for (i = 0; i < font->charcount; i++) {
2266 memcpy(data, fontdata, j);
2267 memset(data + j, 0, 32 - j);
2268 data += 32;
2269 fontdata += j;
2270 }
2271 } else if (font->width <= 16) {
2272 j = vc->vc_font.height * 2;
2273 if (font->charcount * j > FNTSIZE(fontdata))
2274 return -EINVAL;
2275
2276 for (i = 0; i < font->charcount; i++) {
2277 memcpy(data, fontdata, j);
2278 memset(data + j, 0, 64 - j);
2279 data += 64;
2280 fontdata += j;
2281 }
2282 } else if (font->width <= 24) {
2283 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2284 return -EINVAL;
2285
2286 for (i = 0; i < font->charcount; i++) {
2287 for (j = 0; j < vc->vc_font.height; j++) {
2288 *data++ = fontdata[0];
2289 *data++ = fontdata[1];
2290 *data++ = fontdata[2];
2291 fontdata += sizeof(u32);
2292 }
2293 memset(data, 0, 3 * (32 - j));
2294 data += 3 * (32 - j);
2295 }
2296 } else {
2297 j = vc->vc_font.height * 4;
2298 if (font->charcount * j > FNTSIZE(fontdata))
2299 return -EINVAL;
2300
2301 for (i = 0; i < font->charcount; i++) {
2302 memcpy(data, fontdata, j);
2303 memset(data + j, 0, 128 - j);
2304 data += 128;
2305 fontdata += j;
2306 }
2307 }
2308 return 0;
2309 }
2310
2311 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2312 static void set_vc_hi_font(struct vc_data *vc, bool set)
2313 {
2314 if (!set) {
2315 vc->vc_hi_font_mask = 0;
2316 if (vc->vc_can_do_color) {
2317 vc->vc_complement_mask >>= 1;
2318 vc->vc_s_complement_mask >>= 1;
2319 }
2320
2321 /* ++Edmund: reorder the attribute bits */
2322 if (vc->vc_can_do_color) {
2323 unsigned short *cp =
2324 (unsigned short *) vc->vc_origin;
2325 int count = vc->vc_screenbuf_size / 2;
2326 unsigned short c;
2327 for (; count > 0; count--, cp++) {
2328 c = scr_readw(cp);
2329 scr_writew(((c & 0xfe00) >> 1) |
2330 (c & 0xff), cp);
2331 }
2332 c = vc->vc_video_erase_char;
2333 vc->vc_video_erase_char =
2334 ((c & 0xfe00) >> 1) | (c & 0xff);
2335 vc->vc_attr >>= 1;
2336 }
2337 } else {
2338 vc->vc_hi_font_mask = 0x100;
2339 if (vc->vc_can_do_color) {
2340 vc->vc_complement_mask <<= 1;
2341 vc->vc_s_complement_mask <<= 1;
2342 }
2343
2344 /* ++Edmund: reorder the attribute bits */
2345 {
2346 unsigned short *cp =
2347 (unsigned short *) vc->vc_origin;
2348 int count = vc->vc_screenbuf_size / 2;
2349 unsigned short c;
2350 for (; count > 0; count--, cp++) {
2351 unsigned short newc;
2352 c = scr_readw(cp);
2353 if (vc->vc_can_do_color)
2354 newc =
2355 ((c & 0xff00) << 1) | (c &
2356 0xff);
2357 else
2358 newc = c & ~0x100;
2359 scr_writew(newc, cp);
2360 }
2361 c = vc->vc_video_erase_char;
2362 if (vc->vc_can_do_color) {
2363 vc->vc_video_erase_char =
2364 ((c & 0xff00) << 1) | (c & 0xff);
2365 vc->vc_attr <<= 1;
2366 } else
2367 vc->vc_video_erase_char = c & ~0x100;
2368 }
2369 }
2370 }
2371
2372 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2373 const u8 * data, int userfont)
2374 {
2375 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2376 struct fbcon_ops *ops = info->fbcon_par;
2377 struct fbcon_display *p = &fb_display[vc->vc_num];
2378 int resize;
2379 char *old_data = NULL;
2380
2381 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2382 if (p->userfont)
2383 old_data = vc->vc_font.data;
2384 vc->vc_font.data = (void *)(p->fontdata = data);
2385 if ((p->userfont = userfont))
2386 REFCOUNT(data)++;
2387 vc->vc_font.width = w;
2388 vc->vc_font.height = h;
2389 vc->vc_font.charcount = charcount;
2390 if (vc->vc_hi_font_mask && charcount == 256)
2391 set_vc_hi_font(vc, false);
2392 else if (!vc->vc_hi_font_mask && charcount == 512)
2393 set_vc_hi_font(vc, true);
2394
2395 if (resize) {
2396 int cols, rows;
2397
2398 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2399 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2400 cols /= w;
2401 rows /= h;
2402 vc_resize(vc, cols, rows);
2403 } else if (con_is_visible(vc)
2404 && vc->vc_mode == KD_TEXT) {
2405 fbcon_clear_margins(vc, 0);
2406 update_screen(vc);
2407 }
2408
2409 if (old_data && (--REFCOUNT(old_data) == 0))
2410 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2411 return 0;
2412 }
2413
2414 /*
2415 * User asked to set font; we are guaranteed that
2416 * a) width and height are in range 1..32
2417 * b) charcount does not exceed 512
2418 * but lets not assume that, since someone might someday want to use larger
2419 * fonts. And charcount of 512 is small for unicode support.
2420 *
2421 * However, user space gives the font in 32 rows , regardless of
2422 * actual font height. So a new API is needed if support for larger fonts
2423 * is ever implemented.
2424 */
2425
2426 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2427 unsigned int flags)
2428 {
2429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2430 unsigned charcount = font->charcount;
2431 int w = font->width;
2432 int h = font->height;
2433 int size;
2434 int i, csum;
2435 u8 *new_data, *data = font->data;
2436 int pitch = PITCH(font->width);
2437
2438 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2439 * If not this check should be changed to charcount < 256 */
2440 if (charcount != 256 && charcount != 512)
2441 return -EINVAL;
2442
2443 /* Make sure drawing engine can handle the font */
2444 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2445 !(info->pixmap.blit_y & (1 << (font->height - 1))))
2446 return -EINVAL;
2447
2448 /* Make sure driver can handle the font length */
2449 if (fbcon_invalid_charcount(info, charcount))
2450 return -EINVAL;
2451
2452 size = CALC_FONTSZ(h, pitch, charcount);
2453
2454 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2455
2456 if (!new_data)
2457 return -ENOMEM;
2458
2459 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2460
2461 new_data += FONT_EXTRA_WORDS * sizeof(int);
2462 FNTSIZE(new_data) = size;
2463 REFCOUNT(new_data) = 0; /* usage counter */
2464 for (i=0; i< charcount; i++) {
2465 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2466 }
2467
2468 /* Since linux has a nice crc32 function use it for counting font
2469 * checksums. */
2470 csum = crc32(0, new_data, size);
2471
2472 FNTSUM(new_data) = csum;
2473 /* Check if the same font is on some other console already */
2474 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2475 struct vc_data *tmp = vc_cons[i].d;
2476
2477 if (fb_display[i].userfont &&
2478 fb_display[i].fontdata &&
2479 FNTSUM(fb_display[i].fontdata) == csum &&
2480 FNTSIZE(fb_display[i].fontdata) == size &&
2481 tmp->vc_font.width == w &&
2482 !memcmp(fb_display[i].fontdata, new_data, size)) {
2483 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2484 new_data = (u8 *)fb_display[i].fontdata;
2485 break;
2486 }
2487 }
2488 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2489 }
2490
2491 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2492 {
2493 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2494 const struct font_desc *f;
2495
2496 if (!name)
2497 f = get_default_font(info->var.xres, info->var.yres,
2498 info->pixmap.blit_x, info->pixmap.blit_y);
2499 else if (!(f = find_font(name)))
2500 return -ENOENT;
2501
2502 font->width = f->width;
2503 font->height = f->height;
2504 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2505 }
2506
2507 static u16 palette_red[16];
2508 static u16 palette_green[16];
2509 static u16 palette_blue[16];
2510
2511 static struct fb_cmap palette_cmap = {
2512 0, 16, palette_red, palette_green, palette_blue, NULL
2513 };
2514
2515 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2516 {
2517 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2518 int i, j, k, depth;
2519 u8 val;
2520
2521 if (fbcon_is_inactive(vc, info))
2522 return;
2523
2524 if (!con_is_visible(vc))
2525 return;
2526
2527 depth = fb_get_color_depth(&info->var, &info->fix);
2528 if (depth > 3) {
2529 for (i = j = 0; i < 16; i++) {
2530 k = table[i];
2531 val = vc->vc_palette[j++];
2532 palette_red[k] = (val << 8) | val;
2533 val = vc->vc_palette[j++];
2534 palette_green[k] = (val << 8) | val;
2535 val = vc->vc_palette[j++];
2536 palette_blue[k] = (val << 8) | val;
2537 }
2538 palette_cmap.len = 16;
2539 palette_cmap.start = 0;
2540 /*
2541 * If framebuffer is capable of less than 16 colors,
2542 * use default palette of fbcon.
2543 */
2544 } else
2545 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2546
2547 fb_set_cmap(&palette_cmap, info);
2548 }
2549
2550 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2551 {
2552 return (u16 *) (vc->vc_origin + offset);
2553 }
2554
2555 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2556 int *px, int *py)
2557 {
2558 unsigned long ret;
2559 int x, y;
2560
2561 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2562 unsigned long offset = (pos - vc->vc_origin) / 2;
2563
2564 x = offset % vc->vc_cols;
2565 y = offset / vc->vc_cols;
2566 ret = pos + (vc->vc_cols - x) * 2;
2567 } else {
2568 /* Should not happen */
2569 x = y = 0;
2570 ret = vc->vc_origin;
2571 }
2572 if (px)
2573 *px = x;
2574 if (py)
2575 *py = y;
2576 return ret;
2577 }
2578
2579 /* As we might be inside of softback, we may work with non-contiguous buffer,
2580 that's why we have to use a separate routine. */
2581 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2582 {
2583 while (cnt--) {
2584 u16 a = scr_readw(p);
2585 if (!vc->vc_can_do_color)
2586 a ^= 0x0800;
2587 else if (vc->vc_hi_font_mask == 0x100)
2588 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2589 (((a) & 0x0e00) << 4);
2590 else
2591 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2592 (((a) & 0x0700) << 4);
2593 scr_writew(a, p++);
2594 }
2595 }
2596
2597 void fbcon_suspended(struct fb_info *info)
2598 {
2599 struct vc_data *vc = NULL;
2600 struct fbcon_ops *ops = info->fbcon_par;
2601
2602 if (!ops || ops->currcon < 0)
2603 return;
2604 vc = vc_cons[ops->currcon].d;
2605
2606 /* Clear cursor, restore saved data */
2607 fbcon_cursor(vc, CM_ERASE);
2608 }
2609
2610 void fbcon_resumed(struct fb_info *info)
2611 {
2612 struct vc_data *vc;
2613 struct fbcon_ops *ops = info->fbcon_par;
2614
2615 if (!ops || ops->currcon < 0)
2616 return;
2617 vc = vc_cons[ops->currcon].d;
2618
2619 update_screen(vc);
2620 }
2621
2622 static void fbcon_modechanged(struct fb_info *info)
2623 {
2624 struct fbcon_ops *ops = info->fbcon_par;
2625 struct vc_data *vc;
2626 struct fbcon_display *p;
2627 int rows, cols;
2628
2629 if (!ops || ops->currcon < 0)
2630 return;
2631 vc = vc_cons[ops->currcon].d;
2632 if (vc->vc_mode != KD_TEXT ||
2633 registered_fb[con2fb_map[ops->currcon]] != info)
2634 return;
2635
2636 p = &fb_display[vc->vc_num];
2637 set_blitting_type(vc, info);
2638
2639 if (con_is_visible(vc)) {
2640 var_to_display(p, &info->var, info);
2641 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2642 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2643 cols /= vc->vc_font.width;
2644 rows /= vc->vc_font.height;
2645 vc_resize(vc, cols, rows);
2646 updatescrollmode(p, info, vc);
2647 scrollback_max = 0;
2648 scrollback_current = 0;
2649
2650 if (!fbcon_is_inactive(vc, info)) {
2651 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2652 ops->update_start(info);
2653 }
2654
2655 fbcon_set_palette(vc, color_table);
2656 update_screen(vc);
2657 }
2658 }
2659
2660 static void fbcon_set_all_vcs(struct fb_info *info)
2661 {
2662 struct fbcon_ops *ops = info->fbcon_par;
2663 struct vc_data *vc;
2664 struct fbcon_display *p;
2665 int i, rows, cols, fg = -1;
2666
2667 if (!ops || ops->currcon < 0)
2668 return;
2669
2670 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2671 vc = vc_cons[i].d;
2672 if (!vc || vc->vc_mode != KD_TEXT ||
2673 registered_fb[con2fb_map[i]] != info)
2674 continue;
2675
2676 if (con_is_visible(vc)) {
2677 fg = i;
2678 continue;
2679 }
2680
2681 p = &fb_display[vc->vc_num];
2682 set_blitting_type(vc, info);
2683 var_to_display(p, &info->var, info);
2684 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2685 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2686 cols /= vc->vc_font.width;
2687 rows /= vc->vc_font.height;
2688 vc_resize(vc, cols, rows);
2689 }
2690
2691 if (fg != -1)
2692 fbcon_modechanged(info);
2693 }
2694
2695
2696 void fbcon_update_vcs(struct fb_info *info, bool all)
2697 {
2698 if (all)
2699 fbcon_set_all_vcs(info);
2700 else
2701 fbcon_modechanged(info);
2702 }
2703 EXPORT_SYMBOL(fbcon_update_vcs);
2704
2705 int fbcon_mode_deleted(struct fb_info *info,
2706 struct fb_videomode *mode)
2707 {
2708 struct fb_info *fb_info;
2709 struct fbcon_display *p;
2710 int i, j, found = 0;
2711
2712 /* before deletion, ensure that mode is not in use */
2713 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2714 j = con2fb_map[i];
2715 if (j == -1)
2716 continue;
2717 fb_info = registered_fb[j];
2718 if (fb_info != info)
2719 continue;
2720 p = &fb_display[i];
2721 if (!p || !p->mode)
2722 continue;
2723 if (fb_mode_is_equal(p->mode, mode)) {
2724 found = 1;
2725 break;
2726 }
2727 }
2728 return found;
2729 }
2730
2731 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2732 static void fbcon_unbind(void)
2733 {
2734 int ret;
2735
2736 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2737 fbcon_is_default);
2738
2739 if (!ret)
2740 fbcon_has_console_bind = 0;
2741 }
2742 #else
2743 static inline void fbcon_unbind(void) {}
2744 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2745
2746 /* called with console_lock held */
2747 void fbcon_fb_unbind(struct fb_info *info)
2748 {
2749 int i, new_idx = -1, ret = 0;
2750 int idx = info->node;
2751
2752 WARN_CONSOLE_UNLOCKED();
2753
2754 if (!fbcon_has_console_bind)
2755 return;
2756
2757 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2758 if (con2fb_map[i] != idx &&
2759 con2fb_map[i] != -1) {
2760 new_idx = con2fb_map[i];
2761 break;
2762 }
2763 }
2764
2765 if (new_idx != -1) {
2766 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2767 if (con2fb_map[i] == idx)
2768 set_con2fb_map(i, new_idx, 0);
2769 }
2770 } else {
2771 struct fb_info *info = registered_fb[idx];
2772
2773 /* This is sort of like set_con2fb_map, except it maps
2774 * the consoles to no device and then releases the
2775 * oldinfo to free memory and cancel the cursor blink
2776 * timer. I can imagine this just becoming part of
2777 * set_con2fb_map where new_idx is -1
2778 */
2779 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2780 if (con2fb_map[i] == idx) {
2781 con2fb_map[i] = -1;
2782 if (!search_fb_in_map(idx)) {
2783 ret = con2fb_release_oldinfo(vc_cons[i].d,
2784 info, NULL, i,
2785 idx, 0);
2786 if (ret) {
2787 con2fb_map[i] = idx;
2788 return;
2789 }
2790 }
2791 }
2792 }
2793 fbcon_unbind();
2794 }
2795 }
2796
2797 /* called with console_lock held */
2798 void fbcon_fb_unregistered(struct fb_info *info)
2799 {
2800 int i, idx;
2801
2802 WARN_CONSOLE_UNLOCKED();
2803
2804 if (deferred_takeover)
2805 return;
2806
2807 idx = info->node;
2808 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2809 if (con2fb_map[i] == idx)
2810 con2fb_map[i] = -1;
2811 }
2812
2813 if (idx == info_idx) {
2814 info_idx = -1;
2815
2816 for_each_registered_fb(i) {
2817 info_idx = i;
2818 break;
2819 }
2820 }
2821
2822 if (info_idx != -1) {
2823 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2824 if (con2fb_map[i] == -1)
2825 con2fb_map[i] = info_idx;
2826 }
2827 }
2828
2829 if (primary_device == idx)
2830 primary_device = -1;
2831
2832 if (!num_registered_fb)
2833 do_unregister_con_driver(&fb_con);
2834 }
2835
2836 void fbcon_remap_all(struct fb_info *info)
2837 {
2838 int i, idx = info->node;
2839
2840 console_lock();
2841 if (deferred_takeover) {
2842 for (i = first_fb_vc; i <= last_fb_vc; i++)
2843 con2fb_map_boot[i] = idx;
2844 fbcon_map_override();
2845 console_unlock();
2846 return;
2847 }
2848
2849 for (i = first_fb_vc; i <= last_fb_vc; i++)
2850 set_con2fb_map(i, idx, 0);
2851
2852 if (con_is_bound(&fb_con)) {
2853 printk(KERN_INFO "fbcon: Remapping primary device, "
2854 "fb%i, to tty %i-%i\n", idx,
2855 first_fb_vc + 1, last_fb_vc + 1);
2856 info_idx = idx;
2857 }
2858 console_unlock();
2859 }
2860
2861 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
2862 static void fbcon_select_primary(struct fb_info *info)
2863 {
2864 if (!map_override && primary_device == -1 &&
2865 fb_is_primary_device(info)) {
2866 int i;
2867
2868 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2869 info->fix.id, info->node);
2870 primary_device = info->node;
2871
2872 for (i = first_fb_vc; i <= last_fb_vc; i++)
2873 con2fb_map_boot[i] = primary_device;
2874
2875 if (con_is_bound(&fb_con)) {
2876 printk(KERN_INFO "fbcon: Remapping primary device, "
2877 "fb%i, to tty %i-%i\n", info->node,
2878 first_fb_vc + 1, last_fb_vc + 1);
2879 info_idx = primary_device;
2880 }
2881 }
2882
2883 }
2884 #else
2885 static inline void fbcon_select_primary(struct fb_info *info)
2886 {
2887 return;
2888 }
2889 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2890
2891 /* called with console_lock held */
2892 int fbcon_fb_registered(struct fb_info *info)
2893 {
2894 int ret = 0, i, idx;
2895
2896 WARN_CONSOLE_UNLOCKED();
2897
2898 idx = info->node;
2899 fbcon_select_primary(info);
2900
2901 if (deferred_takeover) {
2902 pr_info("fbcon: Deferring console take-over\n");
2903 return 0;
2904 }
2905
2906 if (info_idx == -1) {
2907 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2908 if (con2fb_map_boot[i] == idx) {
2909 info_idx = idx;
2910 break;
2911 }
2912 }
2913
2914 if (info_idx != -1)
2915 ret = do_fbcon_takeover(1);
2916 } else {
2917 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2918 if (con2fb_map_boot[i] == idx)
2919 set_con2fb_map(i, idx, 0);
2920 }
2921 }
2922
2923 return ret;
2924 }
2925
2926 void fbcon_fb_blanked(struct fb_info *info, int blank)
2927 {
2928 struct fbcon_ops *ops = info->fbcon_par;
2929 struct vc_data *vc;
2930
2931 if (!ops || ops->currcon < 0)
2932 return;
2933
2934 vc = vc_cons[ops->currcon].d;
2935 if (vc->vc_mode != KD_TEXT ||
2936 registered_fb[con2fb_map[ops->currcon]] != info)
2937 return;
2938
2939 if (con_is_visible(vc)) {
2940 if (blank)
2941 do_blank_screen(0);
2942 else
2943 do_unblank_screen(0);
2944 }
2945 ops->blank_state = blank;
2946 }
2947
2948 void fbcon_new_modelist(struct fb_info *info)
2949 {
2950 int i;
2951 struct vc_data *vc;
2952 struct fb_var_screeninfo var;
2953 const struct fb_videomode *mode;
2954
2955 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2956 if (registered_fb[con2fb_map[i]] != info)
2957 continue;
2958 if (!fb_display[i].mode)
2959 continue;
2960 vc = vc_cons[i].d;
2961 display_to_var(&var, &fb_display[i]);
2962 mode = fb_find_nearest_mode(fb_display[i].mode,
2963 &info->modelist);
2964 fb_videomode_to_var(&var, mode);
2965 fbcon_set_disp(info, &var, vc->vc_num);
2966 }
2967 }
2968
2969 void fbcon_get_requirement(struct fb_info *info,
2970 struct fb_blit_caps *caps)
2971 {
2972 struct vc_data *vc;
2973
2974 if (caps->flags) {
2975 int i, charcnt;
2976
2977 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2978 vc = vc_cons[i].d;
2979 if (vc && vc->vc_mode == KD_TEXT &&
2980 info->node == con2fb_map[i]) {
2981 caps->x |= 1 << (vc->vc_font.width - 1);
2982 caps->y |= 1 << (vc->vc_font.height - 1);
2983 charcnt = vc->vc_font.charcount;
2984 if (caps->len < charcnt)
2985 caps->len = charcnt;
2986 }
2987 }
2988 } else {
2989 vc = vc_cons[fg_console].d;
2990
2991 if (vc && vc->vc_mode == KD_TEXT &&
2992 info->node == con2fb_map[fg_console]) {
2993 caps->x = 1 << (vc->vc_font.width - 1);
2994 caps->y = 1 << (vc->vc_font.height - 1);
2995 caps->len = vc->vc_font.charcount;
2996 }
2997 }
2998 }
2999
3000 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3001 {
3002 struct fb_con2fbmap con2fb;
3003 int ret;
3004
3005 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3006 return -EFAULT;
3007 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3008 return -EINVAL;
3009 if (con2fb.framebuffer >= FB_MAX)
3010 return -EINVAL;
3011 if (!registered_fb[con2fb.framebuffer])
3012 request_module("fb%d", con2fb.framebuffer);
3013 if (!registered_fb[con2fb.framebuffer]) {
3014 return -EINVAL;
3015 }
3016
3017 console_lock();
3018 ret = set_con2fb_map(con2fb.console - 1,
3019 con2fb.framebuffer, 1);
3020 console_unlock();
3021
3022 return ret;
3023 }
3024
3025 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3026 {
3027 struct fb_con2fbmap con2fb;
3028
3029 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3030 return -EFAULT;
3031 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3032 return -EINVAL;
3033
3034 console_lock();
3035 con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3036 console_unlock();
3037
3038 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3039 }
3040
3041 /*
3042 * The console `switch' structure for the frame buffer based console
3043 */
3044
3045 static const struct consw fb_con = {
3046 .owner = THIS_MODULE,
3047 .con_startup = fbcon_startup,
3048 .con_init = fbcon_init,
3049 .con_deinit = fbcon_deinit,
3050 .con_clear = fbcon_clear,
3051 .con_putc = fbcon_putc,
3052 .con_putcs = fbcon_putcs,
3053 .con_cursor = fbcon_cursor,
3054 .con_scroll = fbcon_scroll,
3055 .con_switch = fbcon_switch,
3056 .con_blank = fbcon_blank,
3057 .con_font_set = fbcon_set_font,
3058 .con_font_get = fbcon_get_font,
3059 .con_font_default = fbcon_set_def_font,
3060 .con_set_palette = fbcon_set_palette,
3061 .con_invert_region = fbcon_invert_region,
3062 .con_screen_pos = fbcon_screen_pos,
3063 .con_getxy = fbcon_getxy,
3064 .con_resize = fbcon_resize,
3065 .con_debug_enter = fbcon_debug_enter,
3066 .con_debug_leave = fbcon_debug_leave,
3067 };
3068
3069 static ssize_t store_rotate(struct device *device,
3070 struct device_attribute *attr, const char *buf,
3071 size_t count)
3072 {
3073 struct fb_info *info;
3074 int rotate, idx;
3075 char **last = NULL;
3076
3077 console_lock();
3078 idx = con2fb_map[fg_console];
3079
3080 if (idx == -1 || registered_fb[idx] == NULL)
3081 goto err;
3082
3083 info = registered_fb[idx];
3084 rotate = simple_strtoul(buf, last, 0);
3085 fbcon_rotate(info, rotate);
3086 err:
3087 console_unlock();
3088 return count;
3089 }
3090
3091 static ssize_t store_rotate_all(struct device *device,
3092 struct device_attribute *attr,const char *buf,
3093 size_t count)
3094 {
3095 struct fb_info *info;
3096 int rotate, idx;
3097 char **last = NULL;
3098
3099 console_lock();
3100 idx = con2fb_map[fg_console];
3101
3102 if (idx == -1 || registered_fb[idx] == NULL)
3103 goto err;
3104
3105 info = registered_fb[idx];
3106 rotate = simple_strtoul(buf, last, 0);
3107 fbcon_rotate_all(info, rotate);
3108 err:
3109 console_unlock();
3110 return count;
3111 }
3112
3113 static ssize_t show_rotate(struct device *device,
3114 struct device_attribute *attr,char *buf)
3115 {
3116 struct fb_info *info;
3117 int rotate = 0, idx;
3118
3119 console_lock();
3120 idx = con2fb_map[fg_console];
3121
3122 if (idx == -1 || registered_fb[idx] == NULL)
3123 goto err;
3124
3125 info = registered_fb[idx];
3126 rotate = fbcon_get_rotate(info);
3127 err:
3128 console_unlock();
3129 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3130 }
3131
3132 static ssize_t show_cursor_blink(struct device *device,
3133 struct device_attribute *attr, char *buf)
3134 {
3135 struct fb_info *info;
3136 struct fbcon_ops *ops;
3137 int idx, blink = -1;
3138
3139 console_lock();
3140 idx = con2fb_map[fg_console];
3141
3142 if (idx == -1 || registered_fb[idx] == NULL)
3143 goto err;
3144
3145 info = registered_fb[idx];
3146 ops = info->fbcon_par;
3147
3148 if (!ops)
3149 goto err;
3150
3151 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3152 err:
3153 console_unlock();
3154 return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3155 }
3156
3157 static ssize_t store_cursor_blink(struct device *device,
3158 struct device_attribute *attr,
3159 const char *buf, size_t count)
3160 {
3161 struct fb_info *info;
3162 int blink, idx;
3163 char **last = NULL;
3164
3165 console_lock();
3166 idx = con2fb_map[fg_console];
3167
3168 if (idx == -1 || registered_fb[idx] == NULL)
3169 goto err;
3170
3171 info = registered_fb[idx];
3172
3173 if (!info->fbcon_par)
3174 goto err;
3175
3176 blink = simple_strtoul(buf, last, 0);
3177
3178 if (blink) {
3179 fbcon_cursor_noblink = 0;
3180 fbcon_add_cursor_timer(info);
3181 } else {
3182 fbcon_cursor_noblink = 1;
3183 fbcon_del_cursor_timer(info);
3184 }
3185
3186 err:
3187 console_unlock();
3188 return count;
3189 }
3190
3191 static struct device_attribute device_attrs[] = {
3192 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3193 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3194 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3195 store_cursor_blink),
3196 };
3197
3198 static int fbcon_init_device(void)
3199 {
3200 int i, error = 0;
3201
3202 fbcon_has_sysfs = 1;
3203
3204 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3205 error = device_create_file(fbcon_device, &device_attrs[i]);
3206
3207 if (error)
3208 break;
3209 }
3210
3211 if (error) {
3212 while (--i >= 0)
3213 device_remove_file(fbcon_device, &device_attrs[i]);
3214
3215 fbcon_has_sysfs = 0;
3216 }
3217
3218 return 0;
3219 }
3220
3221 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3222 static void fbcon_register_existing_fbs(struct work_struct *work)
3223 {
3224 int i;
3225
3226 console_lock();
3227
3228 for_each_registered_fb(i)
3229 fbcon_fb_registered(registered_fb[i]);
3230
3231 console_unlock();
3232 }
3233
3234 static struct notifier_block fbcon_output_nb;
3235 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3236
3237 static int fbcon_output_notifier(struct notifier_block *nb,
3238 unsigned long action, void *data)
3239 {
3240 WARN_CONSOLE_UNLOCKED();
3241
3242 pr_info("fbcon: Taking over console\n");
3243
3244 dummycon_unregister_output_notifier(&fbcon_output_nb);
3245 deferred_takeover = false;
3246 logo_shown = FBCON_LOGO_DONTSHOW;
3247
3248 /* We may get called in atomic context */
3249 schedule_work(&fbcon_deferred_takeover_work);
3250
3251 return NOTIFY_OK;
3252 }
3253 #endif
3254
3255 static void fbcon_start(void)
3256 {
3257 WARN_CONSOLE_UNLOCKED();
3258
3259 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3260 if (conswitchp != &dummy_con)
3261 deferred_takeover = false;
3262
3263 if (deferred_takeover) {
3264 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3265 dummycon_register_output_notifier(&fbcon_output_nb);
3266 return;
3267 }
3268 #endif
3269
3270 if (num_registered_fb) {
3271 int i;
3272
3273 for_each_registered_fb(i) {
3274 info_idx = i;
3275 break;
3276 }
3277
3278 do_fbcon_takeover(0);
3279 }
3280 }
3281
3282 static void fbcon_exit(void)
3283 {
3284 struct fb_info *info;
3285 int i, j, mapped;
3286
3287 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3288 if (deferred_takeover) {
3289 dummycon_unregister_output_notifier(&fbcon_output_nb);
3290 deferred_takeover = false;
3291 }
3292 #endif
3293
3294 for_each_registered_fb(i) {
3295 int pending = 0;
3296
3297 mapped = 0;
3298 info = registered_fb[i];
3299
3300 if (info->queue.func)
3301 pending = cancel_work_sync(&info->queue);
3302 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3303 "no"));
3304
3305 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3306 if (con2fb_map[j] == i) {
3307 mapped = 1;
3308 con2fb_map[j] = -1;
3309 }
3310 }
3311
3312 if (mapped) {
3313 if (info->fbops->fb_release)
3314 info->fbops->fb_release(info, 0);
3315 module_put(info->fbops->owner);
3316
3317 if (info->fbcon_par) {
3318 struct fbcon_ops *ops = info->fbcon_par;
3319
3320 fbcon_del_cursor_timer(info);
3321 kfree(ops->cursor_src);
3322 kfree(ops->cursor_state.mask);
3323 kfree(info->fbcon_par);
3324 info->fbcon_par = NULL;
3325 }
3326
3327 if (info->queue.func == fb_flashcursor)
3328 info->queue.func = NULL;
3329 }
3330 }
3331 }
3332
3333 void __init fb_console_init(void)
3334 {
3335 int i;
3336
3337 console_lock();
3338 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3339 "fbcon");
3340
3341 if (IS_ERR(fbcon_device)) {
3342 printk(KERN_WARNING "Unable to create device "
3343 "for fbcon; errno = %ld\n",
3344 PTR_ERR(fbcon_device));
3345 fbcon_device = NULL;
3346 } else
3347 fbcon_init_device();
3348
3349 for (i = 0; i < MAX_NR_CONSOLES; i++)
3350 con2fb_map[i] = -1;
3351
3352 fbcon_start();
3353 console_unlock();
3354 }
3355
3356 #ifdef MODULE
3357
3358 static void __exit fbcon_deinit_device(void)
3359 {
3360 int i;
3361
3362 if (fbcon_has_sysfs) {
3363 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3364 device_remove_file(fbcon_device, &device_attrs[i]);
3365
3366 fbcon_has_sysfs = 0;
3367 }
3368 }
3369
3370 void __exit fb_console_exit(void)
3371 {
3372 console_lock();
3373 fbcon_deinit_device();
3374 device_destroy(fb_class, MKDEV(0, 0));
3375 fbcon_exit();
3376 do_unregister_con_driver(&fb_con);
3377 console_unlock();
3378 }
3379 #endif
Linux with added FPC-III support