]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - drivers/video/console/fbcon.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] nvidiafb: Fix empty macro
[mirror_ubuntu-zesty-kernel.git] / drivers / video / console / fbcon.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59#undef FBCONDEBUG
60
61#include <linux/config.h>
62#include <linux/module.h>
63#include <linux/types.h>
64#include <linux/sched.h>
65#include <linux/fs.h>
66#include <linux/kernel.h>
67#include <linux/delay.h> /* MSch: for IRQ probe */
68#include <linux/tty.h>
69#include <linux/console.h>
70#include <linux/string.h>
71#include <linux/kd.h>
72#include <linux/slab.h>
73#include <linux/fb.h>
74#include <linux/vt_kern.h>
75#include <linux/selection.h>
76#include <linux/font.h>
77#include <linux/smp.h>
78#include <linux/init.h>
79#include <linux/interrupt.h>
80#include <linux/crc32.h> /* For counting font checksums */
81#include <asm/irq.h>
82#include <asm/system.h>
83#include <asm/uaccess.h>
84#ifdef CONFIG_ATARI
85#include <asm/atariints.h>
86#endif
87#ifdef CONFIG_MAC
88#include <asm/macints.h>
89#endif
90#if defined(__mc68000__) || defined(CONFIG_APUS)
91#include <asm/machdep.h>
92#include <asm/setup.h>
93#endif
94
95#include "fbcon.h"
96
97#ifdef FBCONDEBUG
98# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
99#else
100# define DPRINTK(fmt, args...)
101#endif
102
103enum {
104 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
105 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
106 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
107};
108
109struct display fb_display[MAX_NR_CONSOLES];
110static signed char con2fb_map[MAX_NR_CONSOLES];
111static signed char con2fb_map_boot[MAX_NR_CONSOLES];
112static int logo_height;
113static int logo_lines;
114/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
115 enums. */
116static int logo_shown = FBCON_LOGO_CANSHOW;
117/* Software scrollback */
118static int fbcon_softback_size = 32768;
119static unsigned long softback_buf, softback_curr;
120static unsigned long softback_in;
121static unsigned long softback_top, softback_end;
122static int softback_lines;
123/* console mappings */
124static int first_fb_vc;
125static int last_fb_vc = MAX_NR_CONSOLES - 1;
126static int fbcon_is_default = 1;
127/* font data */
128static char fontname[40];
129
130/* current fb_info */
131static int info_idx = -1;
132
133static const struct consw fb_con;
134
135#define CM_SOFTBACK (8)
136
137#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
138
139static void fbcon_free_font(struct display *);
140static int fbcon_set_origin(struct vc_data *);
141
142#define CURSOR_DRAW_DELAY (1)
143
144/* # VBL ints between cursor state changes */
1da177e4
LT		 145#define ATARI_CURSOR_BLINK_RATE (42)
146#define MAC_CURSOR_BLINK_RATE (32)
147#define DEFAULT_CURSOR_BLINK_RATE (20)
148
149static int vbl_cursor_cnt;
150
151#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
152
153/*
154 * Interface used by the world
155 */
156
157static const char *fbcon_startup(void);
158static void fbcon_init(struct vc_data *vc, int init);
159static void fbcon_deinit(struct vc_data *vc);
160static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
161 int width);
162static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
163static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
164 int count, int ypos, int xpos);
165static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
166static void fbcon_cursor(struct vc_data *vc, int mode);
167static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
168 int count);
169static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
170 int height, int width);
171static int fbcon_switch(struct vc_data *vc);
172static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
173static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
174static int fbcon_scrolldelta(struct vc_data *vc, int lines);
175
176/*
177 * Internal routines
178 */
179static __inline__ int real_y(struct display *p, int ypos);
180static __inline__ void ywrap_up(struct vc_data *vc, int count);
181static __inline__ void ywrap_down(struct vc_data *vc, int count);
182static __inline__ void ypan_up(struct vc_data *vc, int count);
183static __inline__ void ypan_down(struct vc_data *vc, int count);
184static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
185 int dy, int dx, int height, int width, u_int y_break);
186static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
187 struct vc_data *vc);
188static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 int unit);
190static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
191 int line, int count, int dy);
192
193#ifdef CONFIG_MAC
194/*
195 * On the Macintoy, there may or may not be a working VBL int. We need to probe
196 */
197static int vbl_detected;
198
199static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
200{
201 vbl_detected++;
202 return IRQ_HANDLED;
203}
204#endif
205
206static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
207{
208 struct fbcon_ops *ops = info->fbcon_par;
209
210 return (info->state != FBINFO_STATE_RUNNING ||
211 vc->vc_mode != KD_TEXT || ops->graphics);
212}
213
214static inline int get_color(struct vc_data *vc, struct fb_info *info,
215 u16 c, int is_fg)
216{
b8c90945 217 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 218 int color = 0;
219
220 if (console_blanked) {
221 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
222
223 c = vc->vc_video_erase_char & charmask;
224 }
225
226 if (depth != 1)
227 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
228 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
229
230 switch (depth) {
231 case 1:
232 {
b8c90945
AD		 233 int col = ~(0xfff << (max(info->var.green.length,
234 max(info->var.red.length,
235 info->var.blue.length)))) & 0xff;
236
1da177e4 237 /* 0 or 1 */
b8c90945
AD		 238 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
239 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 240
241 if (console_blanked)
242 fg = bg;
243
244 color = (is_fg) ? fg : bg;
245 break;
246 }
247 case 2:
248 /*
249 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 250 * is grayscale. However, simply dividing the values by 4
251 * will not work, as colors 1, 2 and 3 will be scaled-down
252 * to zero rendering them invisible. So empirically convert
253 * colors to a sane 4-level grayscale.
1da177e4 254 */
2cc38ed1
AD		 255 switch (color) {
256 case 0:
257 color = 0; /* black */
258 break;
259 case 1 ... 6:
260 color = 2; /* white */
261 break;
262 case 7 ... 8:
263 color = 1; /* gray */
264 break;
265 default:
266 color = 3; /* intense white */
267 break;
268 }
269 break;
1da177e4
LT		 270 case 3:
271 /*
272 * Last 8 entries of default 16-color palette is a more intense
273 * version of the first 8 (i.e., same chrominance, different
274 * luminance).
275 */
276 color &= 7;
277 break;
278 }
279
280
281 return color;
282}
283
4d9c5b6e
AD		 284static void fbcon_update_softback(struct vc_data *vc)
285{
286 int l = fbcon_softback_size / vc->vc_size_row;
287
288 if (l > 5)
289 softback_end = softback_buf + l * vc->vc_size_row;
290 else
291 /* Smaller scrollback makes no sense, and 0 would screw
292 the operation totally */
293 softback_top = 0;
294}
295
1da177e4
LT		 296static void fb_flashcursor(void *private)
297{
298 struct fb_info *info = private;
299 struct fbcon_ops *ops = info->fbcon_par;
300 struct display *p;
301 struct vc_data *vc = NULL;
302 int c;
303 int mode;
304
305 if (ops->currcon != -1)
306 vc = vc_cons[ops->currcon].d;
307
308 if (!vc || !CON_IS_VISIBLE(vc) ||
309 fbcon_is_inactive(vc, info) ||
dbd4f128
MJ		 310 registered_fb[con2fb_map[vc->vc_num]] != info ||
311 vc_cons[ops->currcon].d->vc_deccm != 1)
1da177e4
LT		 312 return;
313 acquire_console_sem();
314 p = &fb_display[vc->vc_num];
315 c = scr_readw((u16 *) vc->vc_pos);
316 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
317 CM_ERASE : CM_DRAW;
318 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
319 get_color(vc, info, c, 0));
320 release_console_sem();
321}
322
41359dca 323#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4
LT		 324static int cursor_blink_rate;
325static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
326{
327 struct fb_info *info = dev_id;
328
329 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
330 schedule_work(&info->queue);
331 vbl_cursor_cnt = cursor_blink_rate;
332 }
333 return IRQ_HANDLED;
334}
335#endif
336
337static void cursor_timer_handler(unsigned long dev_addr)
338{
339 struct fb_info *info = (struct fb_info *) dev_addr;
340 struct fbcon_ops *ops = info->fbcon_par;
341
342 schedule_work(&info->queue);
343 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
344}
345
88fb2c6e
AD		 346static void fbcon_add_cursor_timer(struct fb_info *info)
347{
348 struct fbcon_ops *ops = info->fbcon_par;
349
350 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
351 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
352 if (!info->queue.func)
353 INIT_WORK(&info->queue, fb_flashcursor, info);
354
355 init_timer(&ops->cursor_timer);
356 ops->cursor_timer.function = cursor_timer_handler;
357 ops->cursor_timer.expires = jiffies + HZ / 5;
358 ops->cursor_timer.data = (unsigned long ) info;
359 add_timer(&ops->cursor_timer);
360 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
361 }
362}
363
364static void fbcon_del_cursor_timer(struct fb_info *info)
365{
366 struct fbcon_ops *ops = info->fbcon_par;
367
368 if (info->queue.func == fb_flashcursor &&
369 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
370 del_timer_sync(&ops->cursor_timer);
371 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
372 }
373}
374
1da177e4
LT		 375#ifndef MODULE
376static int __init fb_console_setup(char *this_opt)
377{
378 char *options;
379 int i, j;
380
381 if (!this_opt || !*this_opt)
382 return 0;
383
384 while ((options = strsep(&this_opt, ",")) != NULL) {
385 if (!strncmp(options, "font:", 5))
386 strcpy(fontname, options + 5);
387
388 if (!strncmp(options, "scrollback:", 11)) {
389 options += 11;
390 if (*options) {
391 fbcon_softback_size = simple_strtoul(options, &options, 0);
392 if (*options == 'k' || *options == 'K') {
393 fbcon_softback_size *= 1024;
394 options++;
395 }
396 if (*options != ',')
397 return 0;
398 options++;
399 } else
400 return 0;
401 }
402
403 if (!strncmp(options, "map:", 4)) {
404 options += 4;
405 if (*options)
406 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
407 if (!options[j])
408 j = 0;
409 con2fb_map_boot[i] =
410 (options[j++]-'0') % FB_MAX;
411 }
412 return 0;
413 }
414
415 if (!strncmp(options, "vc:", 3)) {
416 options += 3;
417 if (*options)
418 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
419 if (first_fb_vc < 0)
420 first_fb_vc = 0;
421 if (*options++ == '-')
422 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
423 fbcon_is_default = 0;
424 }
425 }
426 return 0;
427}
428
429__setup("fbcon=", fb_console_setup);
430#endif
431
432static int search_fb_in_map(int idx)
433{
434 int i, retval = 0;
435
436 for (i = 0; i < MAX_NR_CONSOLES; i++) {
437 if (con2fb_map[i] == idx)
438 retval = 1;
439 }
440 return retval;
441}
442
443static int search_for_mapped_con(void)
444{
445 int i, retval = 0;
446
447 for (i = 0; i < MAX_NR_CONSOLES; i++) {
448 if (con2fb_map[i] != -1)
449 retval = 1;
450 }
451 return retval;
452}
453
454static int fbcon_takeover(int show_logo)
455{
456 int err, i;
457
458 if (!num_registered_fb)
459 return -ENODEV;
460
461 if (!show_logo)
462 logo_shown = FBCON_LOGO_DONTSHOW;
463
464 for (i = first_fb_vc; i <= last_fb_vc; i++)
465 con2fb_map[i] = info_idx;
466
467 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
468 fbcon_is_default);
469 if (err) {
470 for (i = first_fb_vc; i <= last_fb_vc; i++) {
471 con2fb_map[i] = -1;
472 }
473 info_idx = -1;
474 }
475
476 return err;
477}
478
479static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
480 int cols, int rows, int new_cols, int new_rows)
481{
482 /* Need to make room for the logo */
483 int cnt, erase = vc->vc_video_erase_char, step;
484 unsigned short *save = NULL, *r, *q;
485
486 /*
487 * remove underline attribute from erase character
488 * if black and white framebuffer.
489 */
b8c90945 490 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4
LT		 491 erase &= ~0x400;
492 logo_height = fb_prepare_logo(info);
493 logo_lines = (logo_height + vc->vc_font.height - 1) /
494 vc->vc_font.height;
495 q = (unsigned short *) (vc->vc_origin +
496 vc->vc_size_row * rows);
497 step = logo_lines * cols;
498 for (r = q - logo_lines * cols; r < q; r++)
499 if (scr_readw(r) != vc->vc_video_erase_char)
500 break;
501 if (r != q && new_rows >= rows + logo_lines) {
502 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
503 if (save) {
504 int i = cols < new_cols ? cols : new_cols;
505 scr_memsetw(save, erase, logo_lines * new_cols * 2);
506 r = q - step;
507 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
508 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
509 r = q;
510 }
511 }
512 if (r == q) {
513 /* We can scroll screen down */
514 r = q - step - cols;
515 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
516 scr_memcpyw(r + step, r, vc->vc_size_row);
517 r -= cols;
518 }
519 if (!save) {
520 vc->vc_y += logo_lines;
521 vc->vc_pos += logo_lines * vc->vc_size_row;
522 }
523 }
524 scr_memsetw((unsigned short *) vc->vc_origin,
525 erase,
526 vc->vc_size_row * logo_lines);
527
528 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
529 fbcon_clear_margins(vc, 0);
530 update_screen(vc);
531 }
532
533 if (save) {
534 q = (unsigned short *) (vc->vc_origin +
535 vc->vc_size_row *
536 rows);
537 scr_memcpyw(q, save, logo_lines * new_cols * 2);
538 vc->vc_y += logo_lines;
539 vc->vc_pos += logo_lines * vc->vc_size_row;
540 kfree(save);
541 }
542
543 if (logo_lines > vc->vc_bottom) {
544 logo_shown = FBCON_LOGO_CANSHOW;
545 printk(KERN_INFO
546 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
547 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
548 logo_shown = FBCON_LOGO_DRAW;
549 vc->vc_top = logo_lines;
550 }
551}
552
553#ifdef CONFIG_FB_TILEBLITTING
554static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
555 struct display *p)
556{
557 struct fbcon_ops *ops = info->fbcon_par;
558
559 if ((info->flags & FBINFO_MISC_TILEBLITTING))
560 fbcon_set_tileops(vc, info, p, ops);
561 else
562 fbcon_set_bitops(ops);
563}
564#else
565static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
566 struct display *p)
567{
568 struct fbcon_ops *ops = info->fbcon_par;
569
570 info->flags &= ~FBINFO_MISC_TILEBLITTING;
571 fbcon_set_bitops(ops);
572}
573#endif /* CONFIG_MISC_TILEBLITTING */
574
575
576static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
577 int unit, int oldidx)
578{
579 struct fbcon_ops *ops = NULL;
580 int err = 0;
581
582 if (!try_module_get(info->fbops->owner))
583 err = -ENODEV;
584
585 if (!err && info->fbops->fb_open &&
586 info->fbops->fb_open(info, 0))
587 err = -ENODEV;
588
589 if (!err) {
590 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
591 if (!ops)
592 err = -ENOMEM;
593 }
594
595 if (!err) {
596 memset(ops, 0, sizeof(struct fbcon_ops));
597 info->fbcon_par = ops;
598 set_blitting_type(vc, info, NULL);
599 }
600
601 if (err) {
602 con2fb_map[unit] = oldidx;
603 module_put(info->fbops->owner);
604 }
605
606 return err;
607}
608
609static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
610 struct fb_info *newinfo, int unit,
611 int oldidx, int found)
612{
613 struct fbcon_ops *ops = oldinfo->fbcon_par;
614 int err = 0;
615
616 if (oldinfo->fbops->fb_release &&
617 oldinfo->fbops->fb_release(oldinfo, 0)) {
618 con2fb_map[unit] = oldidx;
619 if (!found && newinfo->fbops->fb_release)
620 newinfo->fbops->fb_release(newinfo, 0);
621 if (!found)
622 module_put(newinfo->fbops->owner);
623 err = -ENODEV;
624 }
625
626 if (!err) {
88fb2c6e 627 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 628 kfree(ops->cursor_state.mask);
629 kfree(ops->cursor_data);
630 kfree(oldinfo->fbcon_par);
631 oldinfo->fbcon_par = NULL;
632 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 633 /*
634 If oldinfo and newinfo are driving the same hardware,
635 the fb_release() method of oldinfo may attempt to
636 restore the hardware state. This will leave the
637 newinfo in an undefined state. Thus, a call to
638 fb_set_par() may be needed for the newinfo.
639 */
640 if (newinfo->fbops->fb_set_par)
641 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 642 }
643
644 return err;
645}
646
1da177e4
LT		 647static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
648 int unit, int show_logo)
649{
650 struct fbcon_ops *ops = info->fbcon_par;
651
652 ops->currcon = fg_console;
653
654 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
655 info->fbops->fb_set_par(info);
656
657 ops->flags |= FBCON_FLAGS_INIT;
658 ops->graphics = 0;
659
660 if (vc)
661 fbcon_set_disp(info, &info->var, vc);
662 else
663 fbcon_preset_disp(info, &info->var, unit);
664
665 if (show_logo) {
666 struct vc_data *fg_vc = vc_cons[fg_console].d;
667 struct fb_info *fg_info =
668 registered_fb[con2fb_map[fg_console]];
669
670 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
671 fg_vc->vc_rows, fg_vc->vc_cols,
672 fg_vc->vc_rows);
673 }
674
675 update_screen(vc_cons[fg_console].d);
676}
677
678/**
679 * set_con2fb_map - map console to frame buffer device
680 * @unit: virtual console number to map
681 * @newidx: frame buffer index to map virtual console to
682 * @user: user request
683 *
684 * Maps a virtual console @unit to a frame buffer device
685 * @newidx.
686 */
687static int set_con2fb_map(int unit, int newidx, int user)
688{
689 struct vc_data *vc = vc_cons[unit].d;
690 int oldidx = con2fb_map[unit];
691 struct fb_info *info = registered_fb[newidx];
692 struct fb_info *oldinfo = NULL;
693 int found, err = 0;
694
695 if (oldidx == newidx)
696 return 0;
697
698 if (!info)
699 err = -EINVAL;
700
701 if (!err && !search_for_mapped_con()) {
702 info_idx = newidx;
703 return fbcon_takeover(0);
704 }
705
706 if (oldidx != -1)
707 oldinfo = registered_fb[oldidx];
708
709 found = search_fb_in_map(newidx);
710
711 acquire_console_sem();
712 con2fb_map[unit] = newidx;
713 if (!err && !found)
714 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
715
716
717 /*
718 * If old fb is not mapped to any of the consoles,
719 * fbcon should release it.
720 */
721 if (!err && oldinfo && !search_fb_in_map(oldidx))
722 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
723 found);
724
725 if (!err) {
726 int show_logo = (fg_console == 0 && !user &&
727 logo_shown != FBCON_LOGO_DONTSHOW);
728
729 if (!found)
88fb2c6e 730 fbcon_add_cursor_timer(info);
1da177e4
LT		 731 con2fb_map_boot[unit] = newidx;
732 con2fb_init_display(vc, info, unit, show_logo);
733 }
734
735 release_console_sem();
736 return err;
737}
738
739/*
740 * Low Level Operations
741 */
742/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
743static int var_to_display(struct display *disp,
744 struct fb_var_screeninfo *var,
745 struct fb_info *info)
746{
747 disp->xres_virtual = var->xres_virtual;
748 disp->yres_virtual = var->yres_virtual;
749 disp->bits_per_pixel = var->bits_per_pixel;
750 disp->grayscale = var->grayscale;
751 disp->nonstd = var->nonstd;
752 disp->accel_flags = var->accel_flags;
753 disp->height = var->height;
754 disp->width = var->width;
755 disp->red = var->red;
756 disp->green = var->green;
757 disp->blue = var->blue;
758 disp->transp = var->transp;
759 disp->rotate = var->rotate;
760 disp->mode = fb_match_mode(var, &info->modelist);
761 if (disp->mode == NULL)
762 /* This should not happen */
763 return -EINVAL;
764 return 0;
765}
766
767static void display_to_var(struct fb_var_screeninfo *var,
768 struct display *disp)
769{
770 fb_videomode_to_var(var, disp->mode);
771 var->xres_virtual = disp->xres_virtual;
772 var->yres_virtual = disp->yres_virtual;
773 var->bits_per_pixel = disp->bits_per_pixel;
774 var->grayscale = disp->grayscale;
775 var->nonstd = disp->nonstd;
776 var->accel_flags = disp->accel_flags;
777 var->height = disp->height;
778 var->width = disp->width;
779 var->red = disp->red;
780 var->green = disp->green;
781 var->blue = disp->blue;
782 var->transp = disp->transp;
783 var->rotate = disp->rotate;
784}
785
786static const char *fbcon_startup(void)
787{
788 const char *display_desc = "frame buffer device";
789 struct display *p = &fb_display[fg_console];
790 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 791 const struct font_desc *font = NULL;
1da177e4
LT		 792 struct module *owner;
793 struct fb_info *info = NULL;
794 struct fbcon_ops *ops;
795 int rows, cols;
796 int irqres;
797
798 irqres = 1;
799 /*
800 * If num_registered_fb is zero, this is a call for the dummy part.
801 * The frame buffer devices weren't initialized yet.
802 */
803 if (!num_registered_fb || info_idx == -1)
804 return display_desc;
805 /*
806 * Instead of blindly using registered_fb[0], we use info_idx, set by
807 * fb_console_init();
808 */
809 info = registered_fb[info_idx];
810 if (!info)
811 return NULL;
812
813 owner = info->fbops->owner;
814 if (!try_module_get(owner))
815 return NULL;
816 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
817 module_put(owner);
818 return NULL;
819 }
820
821 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
822 if (!ops) {
823 module_put(owner);
824 return NULL;
825 }
826
827 memset(ops, 0, sizeof(struct fbcon_ops));
828 ops->currcon = -1;
829 ops->graphics = 1;
830 info->fbcon_par = ops;
831 set_blitting_type(vc, info, NULL);
832
833 if (info->fix.type != FB_TYPE_TEXT) {
834 if (fbcon_softback_size) {
835 if (!softback_buf) {
836 softback_buf =
837 (unsigned long)
838 kmalloc(fbcon_softback_size,
839 GFP_KERNEL);
840 if (!softback_buf) {
841 fbcon_softback_size = 0;
842 softback_top = 0;
843 }
844 }
845 } else {
846 if (softback_buf) {
847 kfree((void *) softback_buf);
848 softback_buf = 0;
849 softback_top = 0;
850 }
851 }
852 if (softback_buf)
853 softback_in = softback_top = softback_curr =
854 softback_buf;
855 softback_lines = 0;
856 }
857
858 /* Setup default font */
859 if (!p->fontdata) {
860 if (!fontname[0] || !(font = find_font(fontname)))
861 font = get_default_font(info->var.xres,
862 info->var.yres);
863 vc->vc_font.width = font->width;
864 vc->vc_font.height = font->height;
2f4516db 865 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 866 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
867 }
868
869 cols = info->var.xres / vc->vc_font.width;
870 rows = info->var.yres / vc->vc_font.height;
871 vc_resize(vc, cols, rows);
872
873 DPRINTK("mode: %s\n", info->fix.id);
874 DPRINTK("visual: %d\n", info->fix.visual);
875 DPRINTK("res: %dx%d-%d\n", info->var.xres,
876 info->var.yres,
877 info->var.bits_per_pixel);
878
879#ifdef CONFIG_ATARI
880 if (MACH_IS_ATARI) {
881 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
882 irqres =
883 request_irq(IRQ_AUTO_4, fb_vbl_handler,
884 IRQ_TYPE_PRIO, "framebuffer vbl",
885 info);
886 }
887#endif /* CONFIG_ATARI */
888
889#ifdef CONFIG_MAC
890 /*
891 * On a Macintoy, the VBL interrupt may or may not be active.
892 * As interrupt based cursor is more reliable and race free, we
893 * probe for VBL interrupts.
894 */
895 if (MACH_IS_MAC) {
896 int ct = 0;
897 /*
898 * Probe for VBL: set temp. handler ...
899 */
900 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
901 "framebuffer vbl", info);
902 vbl_detected = 0;
903
904 /*
905 * ... and spin for 20 ms ...
906 */
907 while (!vbl_detected && ++ct < 1000)
908 udelay(20);
909
910 if (ct == 1000)
911 printk
912 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
913
914 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
915
916 if (vbl_detected) {
917 /*
918 * interrupt based cursor ok
919 */
920 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
921 irqres =
922 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
923 "framebuffer vbl", info);
924 } else {
925 /*
926 * VBL not detected: fall through, use timer based cursor
927 */
928 irqres = 1;
929 }
930 }
931#endif /* CONFIG_MAC */
932
88fb2c6e 933 fbcon_add_cursor_timer(info);
1da177e4
LT		 934 return display_desc;
935}
936
937static void fbcon_init(struct vc_data *vc, int init)
938{
939 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
940 struct fbcon_ops *ops;
941 struct vc_data **default_mode = vc->vc_display_fg;
942 struct vc_data *svc = *default_mode;
943 struct display *t, *p = &fb_display[vc->vc_num];
944 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 945 int cap;
1da177e4
LT		 946
947 if (info_idx == -1 || info == NULL)
948 return;
306958e8
AB		 949
950 cap = info->flags;
951
1da177e4
LT		 952 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
953 (info->fix.type == FB_TYPE_TEXT))
954 logo = 0;
955
956 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
957
958 if (var_to_display(p, &info->var, info))
959 return;
960
961 /* If we are not the first console on this
962 fb, copy the font from that console */
963 t = &fb_display[svc->vc_num];
964 if (!vc->vc_font.data) {
2f4516db 965 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 966 vc->vc_font.width = (*default_mode)->vc_font.width;
967 vc->vc_font.height = (*default_mode)->vc_font.height;
968 p->userfont = t->userfont;
969 if (p->userfont)
970 REFCOUNT(p->fontdata)++;
971 }
972 if (p->userfont)
973 charcnt = FNTCHARCNT(p->fontdata);
b8c90945 974 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 975 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
976 if (charcnt == 256) {
977 vc->vc_hi_font_mask = 0;
978 } else {
979 vc->vc_hi_font_mask = 0x100;
980 if (vc->vc_can_do_color)
981 vc->vc_complement_mask <<= 1;
982 }
983
984 if (!*svc->vc_uni_pagedir_loc)
985 con_set_default_unimap(svc);
986 if (!*vc->vc_uni_pagedir_loc)
987 con_copy_unimap(vc, svc);
988
989 cols = vc->vc_cols;
990 rows = vc->vc_rows;
991 new_cols = info->var.xres / vc->vc_font.width;
992 new_rows = info->var.yres / vc->vc_font.height;
993 vc_resize(vc, new_cols, new_rows);
994
995 ops = info->fbcon_par;
996 /*
997 * We must always set the mode. The mode of the previous console
998 * driver could be in the same resolution but we are using different
999 * hardware so we have to initialize the hardware.
1000 *
1001 * We need to do it in fbcon_init() to prevent screen corruption.
1002 */
1003 if (CON_IS_VISIBLE(vc)) {
1004 if (info->fbops->fb_set_par &&
1005 !(ops->flags & FBCON_FLAGS_INIT))
1006 info->fbops->fb_set_par(info);
1007 ops->flags |= FBCON_FLAGS_INIT;
1008 }
1009
1010 ops->graphics = 0;
1011
1012 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1013 !(cap & FBINFO_HWACCEL_DISABLED))
1014 p->scrollmode = SCROLL_MOVE;
1015 else /* default to something safe */
1016 p->scrollmode = SCROLL_REDRAW;
1017
1018 /*
1019 * ++guenther: console.c:vc_allocate() relies on initializing
1020 * vc_{cols,rows}, but we must not set those if we are only
1021 * resizing the console.
1022 */
1023 if (!init) {
1024 vc->vc_cols = new_cols;
1025 vc->vc_rows = new_rows;
1026 }
1027
1028 if (logo)
1029 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1030
4d9c5b6e
AD		 1031 if (vc == svc && softback_buf)
1032 fbcon_update_softback(vc);
1da177e4
LT		 1033}
1034
1035static void fbcon_deinit(struct vc_data *vc)
1036{
1037 struct display *p = &fb_display[vc->vc_num];
1038
1039 if (info_idx != -1)
1040 return;
1041 fbcon_free_font(p);
1042}
1043
1044/* ====================================================================== */
1045
1046/* fbcon_XXX routines - interface used by the world
1047 *
1048 * This system is now divided into two levels because of complications
1049 * caused by hardware scrolling. Top level functions:
1050 *
1051 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1052 *
1053 * handles y values in range [0, scr_height-1] that correspond to real
1054 * screen positions. y_wrap shift means that first line of bitmap may be
1055 * anywhere on this display. These functions convert lineoffsets to
1056 * bitmap offsets and deal with the wrap-around case by splitting blits.
1057 *
1058 * fbcon_bmove_physical_8() -- These functions fast implementations
1059 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1060 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1061 *
1062 * WARNING:
1063 *
1064 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1065 * Implies should only really hardware scroll in rows. Only reason for
1066 * restriction is simplicity & efficiency at the moment.
1067 */
1068
1069static __inline__ int real_y(struct display *p, int ypos)
1070{
1071 int rows = p->vrows;
1072
1073 ypos += p->yscroll;
1074 return ypos < rows ? ypos : ypos - rows;
1075}
1076
1077
1078static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1079 int width)
1080{
1081 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1082 struct fbcon_ops *ops = info->fbcon_par;
1083
1084 struct display *p = &fb_display[vc->vc_num];
1085 u_int y_break;
1086
1087 if (fbcon_is_inactive(vc, info))
1088 return;
1089
1090 if (!height || !width)
1091 return;
1092
1093 /* Split blits that cross physical y_wrap boundary */
1094
1095 y_break = p->vrows - p->yscroll;
1096 if (sy < y_break && sy + height - 1 >= y_break) {
1097 u_int b = y_break - sy;
1098 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1099 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1100 width);
1101 } else
1102 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1103}
1104
1105static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1106 int count, int ypos, int xpos)
1107{
1108 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1109 struct display *p = &fb_display[vc->vc_num];
1110 struct fbcon_ops *ops = info->fbcon_par;
1111
1112 if (!fbcon_is_inactive(vc, info))
1113 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1114 get_color(vc, info, scr_readw(s), 1),
1115 get_color(vc, info, scr_readw(s), 0));
1116}
1117
1118static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1119{
1120 unsigned short chr;
1121
1122 scr_writew(c, &chr);
1123 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1124}
1125
1126static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1127{
1128 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1129 struct fbcon_ops *ops = info->fbcon_par;
1130
1131 if (!fbcon_is_inactive(vc, info))
1132 ops->clear_margins(vc, info, bottom_only);
1133}
1134
1135static void fbcon_cursor(struct vc_data *vc, int mode)
1136{
1137 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1138 struct fbcon_ops *ops = info->fbcon_par;
1139 struct display *p = &fb_display[vc->vc_num];
1140 int y;
1141 int c = scr_readw((u16 *) vc->vc_pos);
1142
1143 if (fbcon_is_inactive(vc, info))
1144 return;
1145
1146 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1147 if (mode & CM_SOFTBACK) {
1148 mode &= ~CM_SOFTBACK;
1149 y = softback_lines;
1150 } else {
1151 if (softback_lines)
1152 fbcon_set_origin(vc);
1153 y = 0;
1154 }
1155
1156 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1157 get_color(vc, info, c, 0));
1158 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1159}
1160
1161static int scrollback_phys_max = 0;
1162static int scrollback_max = 0;
1163static int scrollback_current = 0;
1164
1165static int update_var(int con, struct fb_info *info)
1166{
1167 if (con == ((struct fbcon_ops *)info->fbcon_par)->currcon)
1168 return fb_pan_display(info, &info->var);
1169 return 0;
1170}
1171
1172/*
1173 * If no vc is existent yet, just set struct display
1174 */
1175static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1176 int unit)
1177{
1178 struct display *p = &fb_display[unit];
1179 struct display *t = &fb_display[fg_console];
1180
1181 var->xoffset = var->yoffset = p->yscroll = 0;
1182 if (var_to_display(p, var, info))
1183 return;
1184
1185 p->fontdata = t->fontdata;
1186 p->userfont = t->userfont;
1187 if (p->userfont)
1188 REFCOUNT(p->fontdata)++;
1189}
1190
1191static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1192 struct vc_data *vc)
1193{
1194 struct display *p = &fb_display[vc->vc_num], *t;
1195 struct vc_data **default_mode = vc->vc_display_fg;
1196 struct vc_data *svc = *default_mode;
1197 int rows, cols, charcnt = 256;
1198
1199 var->xoffset = var->yoffset = p->yscroll = 0;
1200 if (var_to_display(p, var, info))
1201 return;
1202 t = &fb_display[svc->vc_num];
1203 if (!vc->vc_font.data) {
2f4516db 1204 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1205 vc->vc_font.width = (*default_mode)->vc_font.width;
1206 vc->vc_font.height = (*default_mode)->vc_font.height;
1207 p->userfont = t->userfont;
1208 if (p->userfont)
1209 REFCOUNT(p->fontdata)++;
1210 }
1211 if (p->userfont)
1212 charcnt = FNTCHARCNT(p->fontdata);
1213
b8c90945
AD		 1214 var->activate = FB_ACTIVATE_NOW;
1215 info->var.activate = var->activate;
1216 info->var.yoffset = info->var.xoffset = 0;
1217 fb_set_var(info, var);
1218
1219 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1220 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1221 if (charcnt == 256) {
1222 vc->vc_hi_font_mask = 0;
1223 } else {
1224 vc->vc_hi_font_mask = 0x100;
1225 if (vc->vc_can_do_color)
1226 vc->vc_complement_mask <<= 1;
1227 }
1228
1229 if (!*svc->vc_uni_pagedir_loc)
1230 con_set_default_unimap(svc);
1231 if (!*vc->vc_uni_pagedir_loc)
1232 con_copy_unimap(vc, svc);
1233
1234 cols = var->xres / vc->vc_font.width;
1235 rows = var->yres / vc->vc_font.height;
1236 vc_resize(vc, cols, rows);
1237 if (CON_IS_VISIBLE(vc)) {
1238 update_screen(vc);
4d9c5b6e
AD		 1239 if (softback_buf)
1240 fbcon_update_softback(vc);
1da177e4
LT		 1241 }
1242}
1243
1244static __inline__ void ywrap_up(struct vc_data *vc, int count)
1245{
1246 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1247 struct display *p = &fb_display[vc->vc_num];
1248
1249 p->yscroll += count;
1250 if (p->yscroll >= p->vrows) /* Deal with wrap */
1251 p->yscroll -= p->vrows;
1252 info->var.xoffset = 0;
1253 info->var.yoffset = p->yscroll * vc->vc_font.height;
1254 info->var.vmode |= FB_VMODE_YWRAP;
1255 update_var(vc->vc_num, info);
1256 scrollback_max += count;
1257 if (scrollback_max > scrollback_phys_max)
1258 scrollback_max = scrollback_phys_max;
1259 scrollback_current = 0;
1260}
1261
1262static __inline__ void ywrap_down(struct vc_data *vc, int count)
1263{
1264 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1265 struct display *p = &fb_display[vc->vc_num];
1266
1267 p->yscroll -= count;
1268 if (p->yscroll < 0) /* Deal with wrap */
1269 p->yscroll += p->vrows;
1270 info->var.xoffset = 0;
1271 info->var.yoffset = p->yscroll * vc->vc_font.height;
1272 info->var.vmode |= FB_VMODE_YWRAP;
1273 update_var(vc->vc_num, info);
1274 scrollback_max -= count;
1275 if (scrollback_max < 0)
1276 scrollback_max = 0;
1277 scrollback_current = 0;
1278}
1279
1280static __inline__ void ypan_up(struct vc_data *vc, int count)
1281{
1282 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1283 struct display *p = &fb_display[vc->vc_num];
1284 struct fbcon_ops *ops = info->fbcon_par;
1285
1286 p->yscroll += count;
1287 if (p->yscroll > p->vrows - vc->vc_rows) {
1288 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1289 0, 0, 0, vc->vc_rows, vc->vc_cols);
1290 p->yscroll -= p->vrows - vc->vc_rows;
1291 }
1292 info->var.xoffset = 0;
1293 info->var.yoffset = p->yscroll * vc->vc_font.height;
1294 info->var.vmode &= ~FB_VMODE_YWRAP;
1295 update_var(vc->vc_num, info);
1296 fbcon_clear_margins(vc, 1);
1297 scrollback_max += count;
1298 if (scrollback_max > scrollback_phys_max)
1299 scrollback_max = scrollback_phys_max;
1300 scrollback_current = 0;
1301}
1302
1303static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1304{
1305 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1306 struct display *p = &fb_display[vc->vc_num];
1307 int redraw = 0;
1308
1309 p->yscroll += count;
1310 if (p->yscroll > p->vrows - vc->vc_rows) {
1311 p->yscroll -= p->vrows - vc->vc_rows;
1312 redraw = 1;
1313 }
1314
1315 info->var.xoffset = 0;
1316 info->var.yoffset = p->yscroll * vc->vc_font.height;
1317 info->var.vmode &= ~FB_VMODE_YWRAP;
1318 if (redraw)
1319 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1320 update_var(vc->vc_num, info);
1321 fbcon_clear_margins(vc, 1);
1322 scrollback_max += count;
1323 if (scrollback_max > scrollback_phys_max)
1324 scrollback_max = scrollback_phys_max;
1325 scrollback_current = 0;
1326}
1327
1328static __inline__ void ypan_down(struct vc_data *vc, int count)
1329{
1330 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1331 struct display *p = &fb_display[vc->vc_num];
1332 struct fbcon_ops *ops = info->fbcon_par;
1333
1334 p->yscroll -= count;
1335 if (p->yscroll < 0) {
1336 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1337 0, vc->vc_rows, vc->vc_cols);
1338 p->yscroll += p->vrows - vc->vc_rows;
1339 }
1340 info->var.xoffset = 0;
1341 info->var.yoffset = p->yscroll * vc->vc_font.height;
1342 info->var.vmode &= ~FB_VMODE_YWRAP;
1343 update_var(vc->vc_num, info);
1344 fbcon_clear_margins(vc, 1);
1345 scrollback_max -= count;
1346 if (scrollback_max < 0)
1347 scrollback_max = 0;
1348 scrollback_current = 0;
1349}
1350
1351static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1352{
1353 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1354 struct display *p = &fb_display[vc->vc_num];
1355 int redraw = 0;
1356
1357 p->yscroll -= count;
1358 if (p->yscroll < 0) {
1359 p->yscroll += p->vrows - vc->vc_rows;
1360 redraw = 1;
1361 }
1362 info->var.xoffset = 0;
1363 info->var.yoffset = p->yscroll * vc->vc_font.height;
1364 info->var.vmode &= ~FB_VMODE_YWRAP;
1365 if (redraw)
1366 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1367 update_var(vc->vc_num, info);
1368 fbcon_clear_margins(vc, 1);
1369 scrollback_max -= count;
1370 if (scrollback_max < 0)
1371 scrollback_max = 0;
1372 scrollback_current = 0;
1373}
1374
1375static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1376 long delta)
1377{
1378 int count = vc->vc_rows;
1379 unsigned short *d, *s;
1380 unsigned long n;
1381 int line = 0;
1382
1383 d = (u16 *) softback_curr;
1384 if (d == (u16 *) softback_in)
1385 d = (u16 *) vc->vc_origin;
1386 n = softback_curr + delta * vc->vc_size_row;
1387 softback_lines -= delta;
1388 if (delta < 0) {
1389 if (softback_curr < softback_top && n < softback_buf) {
1390 n += softback_end - softback_buf;
1391 if (n < softback_top) {
1392 softback_lines -=
1393 (softback_top - n) / vc->vc_size_row;
1394 n = softback_top;
1395 }
1396 } else if (softback_curr >= softback_top
1397 && n < softback_top) {
1398 softback_lines -=
1399 (softback_top - n) / vc->vc_size_row;
1400 n = softback_top;
1401 }
1402 } else {
1403 if (softback_curr > softback_in && n >= softback_end) {
1404 n += softback_buf - softback_end;
1405 if (n > softback_in) {
1406 n = softback_in;
1407 softback_lines = 0;
1408 }
1409 } else if (softback_curr <= softback_in && n > softback_in) {
1410 n = softback_in;
1411 softback_lines = 0;
1412 }
1413 }
1414 if (n == softback_curr)
1415 return;
1416 softback_curr = n;
1417 s = (u16 *) softback_curr;
1418 if (s == (u16 *) softback_in)
1419 s = (u16 *) vc->vc_origin;
1420 while (count--) {
1421 unsigned short *start;
1422 unsigned short *le;
1423 unsigned short c;
1424 int x = 0;
1425 unsigned short attr = 1;
1426
1427 start = s;
1428 le = advance_row(s, 1);
1429 do {
1430 c = scr_readw(s);
1431 if (attr != (c & 0xff00)) {
1432 attr = c & 0xff00;
1433 if (s > start) {
1434 fbcon_putcs(vc, start, s - start,
1435 line, x);
1436 x += s - start;
1437 start = s;
1438 }
1439 }
1440 if (c == scr_readw(d)) {
1441 if (s > start) {
1442 fbcon_putcs(vc, start, s - start,
1443 line, x);
1444 x += s - start + 1;
1445 start = s + 1;
1446 } else {
1447 x++;
1448 start++;
1449 }
1450 }
1451 s++;
1452 d++;
1453 } while (s < le);
1454 if (s > start)
1455 fbcon_putcs(vc, start, s - start, line, x);
1456 line++;
1457 if (d == (u16 *) softback_end)
1458 d = (u16 *) softback_buf;
1459 if (d == (u16 *) softback_in)
1460 d = (u16 *) vc->vc_origin;
1461 if (s == (u16 *) softback_end)
1462 s = (u16 *) softback_buf;
1463 if (s == (u16 *) softback_in)
1464 s = (u16 *) vc->vc_origin;
1465 }
1466}
1467
1468static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1469 int line, int count, int dy)
1470{
1471 unsigned short *s = (unsigned short *)
1472 (vc->vc_origin + vc->vc_size_row * line);
1473
1474 while (count--) {
1475 unsigned short *start = s;
1476 unsigned short *le = advance_row(s, 1);
1477 unsigned short c;
1478 int x = 0;
1479 unsigned short attr = 1;
1480
1481 do {
1482 c = scr_readw(s);
1483 if (attr != (c & 0xff00)) {
1484 attr = c & 0xff00;
1485 if (s > start) {
1486 fbcon_putcs(vc, start, s - start,
1487 dy, x);
1488 x += s - start;
1489 start = s;
1490 }
1491 }
1492 console_conditional_schedule();
1493 s++;
1494 } while (s < le);
1495 if (s > start)
1496 fbcon_putcs(vc, start, s - start, dy, x);
1497 console_conditional_schedule();
1498 dy++;
1499 }
1500}
1501
1502static void fbcon_redraw(struct vc_data *vc, struct display *p,
1503 int line, int count, int offset)
1504{
1505 unsigned short *d = (unsigned short *)
1506 (vc->vc_origin + vc->vc_size_row * line);
1507 unsigned short *s = d + offset;
1508
1509 while (count--) {
1510 unsigned short *start = s;
1511 unsigned short *le = advance_row(s, 1);
1512 unsigned short c;
1513 int x = 0;
1514 unsigned short attr = 1;
1515
1516 do {
1517 c = scr_readw(s);
1518 if (attr != (c & 0xff00)) {
1519 attr = c & 0xff00;
1520 if (s > start) {
1521 fbcon_putcs(vc, start, s - start,
1522 line, x);
1523 x += s - start;
1524 start = s;
1525 }
1526 }
1527 if (c == scr_readw(d)) {
1528 if (s > start) {
1529 fbcon_putcs(vc, start, s - start,
1530 line, x);
1531 x += s - start + 1;
1532 start = s + 1;
1533 } else {
1534 x++;
1535 start++;
1536 }
1537 }
1538 scr_writew(c, d);
1539 console_conditional_schedule();
1540 s++;
1541 d++;
1542 } while (s < le);
1543 if (s > start)
1544 fbcon_putcs(vc, start, s - start, line, x);
1545 console_conditional_schedule();
1546 if (offset > 0)
1547 line++;
1548 else {
1549 line--;
1550 /* NOTE: We subtract two lines from these pointers */
1551 s -= vc->vc_size_row;
1552 d -= vc->vc_size_row;
1553 }
1554 }
1555}
1556
1557static inline void fbcon_softback_note(struct vc_data *vc, int t,
1558 int count)
1559{
1560 unsigned short *p;
1561
1562 if (vc->vc_num != fg_console)
1563 return;
1564 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1565
1566 while (count) {
1567 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1568 count--;
1569 p = advance_row(p, 1);
1570 softback_in += vc->vc_size_row;
1571 if (softback_in == softback_end)
1572 softback_in = softback_buf;
1573 if (softback_in == softback_top) {
1574 softback_top += vc->vc_size_row;
1575 if (softback_top == softback_end)
1576 softback_top = softback_buf;
1577 }
1578 }
1579 softback_curr = softback_in;
1580}
1581
1582static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1583 int count)
1584{
1585 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1586 struct display *p = &fb_display[vc->vc_num];
1587 struct fbcon_ops *ops = info->fbcon_par;
1588 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1589
1590 if (fbcon_is_inactive(vc, info))
1591 return -EINVAL;
1592
1593 fbcon_cursor(vc, CM_ERASE);
1594
1595 /*
1596 * ++Geert: Only use ywrap/ypan if the console is in text mode
1597 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1598 * whole screen (prevents flicker).
1599 */
1600
1601 switch (dir) {
1602 case SM_UP:
1603 if (count > vc->vc_rows) /* Maximum realistic size */
1604 count = vc->vc_rows;
1605 if (softback_top)
1606 fbcon_softback_note(vc, t, count);
1607 if (logo_shown >= 0)
1608 goto redraw_up;
1609 switch (p->scrollmode) {
1610 case SCROLL_MOVE:
1611 ops->bmove(vc, info, t + count, 0, t, 0,
1612 b - t - count, vc->vc_cols);
1613 ops->clear(vc, info, b - count, 0, count,
1614 vc->vc_cols);
1615 break;
1616
1617 case SCROLL_WRAP_MOVE:
1618 if (b - t - count > 3 * vc->vc_rows >> 2) {
1619 if (t > 0)
1620 fbcon_bmove(vc, 0, 0, count, 0, t,
1621 vc->vc_cols);
1622 ywrap_up(vc, count);
1623 if (vc->vc_rows - b > 0)
1624 fbcon_bmove(vc, b - count, 0, b, 0,
1625 vc->vc_rows - b,
1626 vc->vc_cols);
1627 } else if (info->flags & FBINFO_READS_FAST)
1628 fbcon_bmove(vc, t + count, 0, t, 0,
1629 b - t - count, vc->vc_cols);
1630 else
1631 goto redraw_up;
1632 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1633 break;
1634
1635 case SCROLL_PAN_REDRAW:
1636 if ((p->yscroll + count <=
1637 2 * (p->vrows - vc->vc_rows))
1638 && ((!scroll_partial && (b - t == vc->vc_rows))
1639 || (scroll_partial
1640 && (b - t - count >
1641 3 * vc->vc_rows >> 2)))) {
1642 if (t > 0)
1643 fbcon_redraw_move(vc, p, 0, t, count);
1644 ypan_up_redraw(vc, t, count);
1645 if (vc->vc_rows - b > 0)
1646 fbcon_redraw_move(vc, p, b - count,
1647 vc->vc_rows - b, b);
1648 } else
1649 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1650 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1651 break;
1652
1653 case SCROLL_PAN_MOVE:
1654 if ((p->yscroll + count <=
1655 2 * (p->vrows - vc->vc_rows))
1656 && ((!scroll_partial && (b - t == vc->vc_rows))
1657 || (scroll_partial
1658 && (b - t - count >
1659 3 * vc->vc_rows >> 2)))) {
1660 if (t > 0)
1661 fbcon_bmove(vc, 0, 0, count, 0, t,
1662 vc->vc_cols);
1663 ypan_up(vc, count);
1664 if (vc->vc_rows - b > 0)
1665 fbcon_bmove(vc, b - count, 0, b, 0,
1666 vc->vc_rows - b,
1667 vc->vc_cols);
1668 } else if (info->flags & FBINFO_READS_FAST)
1669 fbcon_bmove(vc, t + count, 0, t, 0,
1670 b - t - count, vc->vc_cols);
1671 else
1672 goto redraw_up;
1673 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1674 break;
1675
1676 case SCROLL_REDRAW:
1677 redraw_up:
1678 fbcon_redraw(vc, p, t, b - t - count,
1679 count * vc->vc_cols);
1680 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1681 scr_memsetw((unsigned short *) (vc->vc_origin +
1682 vc->vc_size_row *
1683 (b - count)),
1684 vc->vc_video_erase_char,
1685 vc->vc_size_row * count);
1686 return 1;
1687 }
1688 break;
1689
1690 case SM_DOWN:
1691 if (count > vc->vc_rows) /* Maximum realistic size */
1692 count = vc->vc_rows;
e703ecc3
JB		 1693 if (logo_shown >= 0)
1694 goto redraw_down;
1da177e4
LT		 1695 switch (p->scrollmode) {
1696 case SCROLL_MOVE:
1697 ops->bmove(vc, info, t, 0, t + count, 0,
1698 b - t - count, vc->vc_cols);
1699 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1700 break;
1701
1702 case SCROLL_WRAP_MOVE:
1703 if (b - t - count > 3 * vc->vc_rows >> 2) {
1704 if (vc->vc_rows - b > 0)
1705 fbcon_bmove(vc, b, 0, b - count, 0,
1706 vc->vc_rows - b,
1707 vc->vc_cols);
1708 ywrap_down(vc, count);
1709 if (t > 0)
1710 fbcon_bmove(vc, count, 0, 0, 0, t,
1711 vc->vc_cols);
1712 } else if (info->flags & FBINFO_READS_FAST)
1713 fbcon_bmove(vc, t, 0, t + count, 0,
1714 b - t - count, vc->vc_cols);
1715 else
1716 goto redraw_down;
1717 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1718 break;
1719
1720 case SCROLL_PAN_MOVE:
1721 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1722 && ((!scroll_partial && (b - t == vc->vc_rows))
1723 || (scroll_partial
1724 && (b - t - count >
1725 3 * vc->vc_rows >> 2)))) {
1726 if (vc->vc_rows - b > 0)
1727 fbcon_bmove(vc, b, 0, b - count, 0,
1728 vc->vc_rows - b,
1729 vc->vc_cols);
1730 ypan_down(vc, count);
1731 if (t > 0)
1732 fbcon_bmove(vc, count, 0, 0, 0, t,
1733 vc->vc_cols);
1734 } else if (info->flags & FBINFO_READS_FAST)
1735 fbcon_bmove(vc, t, 0, t + count, 0,
1736 b - t - count, vc->vc_cols);
1737 else
1738 goto redraw_down;
1739 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1740 break;
1741
1742 case SCROLL_PAN_REDRAW:
1743 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1744 && ((!scroll_partial && (b - t == vc->vc_rows))
1745 || (scroll_partial
1746 && (b - t - count >
1747 3 * vc->vc_rows >> 2)))) {
1748 if (vc->vc_rows - b > 0)
1749 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1750 b - count);
1751 ypan_down_redraw(vc, t, count);
1752 if (t > 0)
1753 fbcon_redraw_move(vc, p, count, t, 0);
1754 } else
1755 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1756 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1757 break;
1758
1759 case SCROLL_REDRAW:
1760 redraw_down:
1761 fbcon_redraw(vc, p, b - 1, b - t - count,
1762 -count * vc->vc_cols);
1763 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1764 scr_memsetw((unsigned short *) (vc->vc_origin +
1765 vc->vc_size_row *
1766 t),
1767 vc->vc_video_erase_char,
1768 vc->vc_size_row * count);
1769 return 1;
1770 }
1771 }
1772 return 0;
1773}
1774
1775
1776static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1777 int height, int width)
1778{
1779 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1780 struct display *p = &fb_display[vc->vc_num];
1781
1782 if (fbcon_is_inactive(vc, info))
1783 return;
1784
1785 if (!width || !height)
1786 return;
1787
1788 /* Split blits that cross physical y_wrap case.
1789 * Pathological case involves 4 blits, better to use recursive
1790 * code rather than unrolled case
1791 *
1792 * Recursive invocations don't need to erase the cursor over and
1793 * over again, so we use fbcon_bmove_rec()
1794 */
1795 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1796 p->vrows - p->yscroll);
1797}
1798
1799static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1800 int dy, int dx, int height, int width, u_int y_break)
1801{
1802 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1803 struct fbcon_ops *ops = info->fbcon_par;
1804 u_int b;
1805
1806 if (sy < y_break && sy + height > y_break) {
1807 b = y_break - sy;
1808 if (dy < sy) { /* Avoid trashing self */
1809 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1810 y_break);
1811 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1812 height - b, width, y_break);
1813 } else {
1814 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1815 height - b, width, y_break);
1816 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1817 y_break);
1818 }
1819 return;
1820 }
1821
1822 if (dy < y_break && dy + height > y_break) {
1823 b = y_break - dy;
1824 if (dy < sy) { /* Avoid trashing self */
1825 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1826 y_break);
1827 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1828 height - b, width, y_break);
1829 } else {
1830 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1831 height - b, width, y_break);
1832 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1833 y_break);
1834 }
1835 return;
1836 }
1837 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1838 height, width);
1839}
1840
1841static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1842 struct vc_data *vc)
1843{
1844 int fh = vc->vc_font.height;
1845 int cap = info->flags;
1846 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1847 && divides(info->fix.ypanstep, vc->vc_font.height)
1848 && info->var.yres_virtual > info->var.yres;
1849 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1850 && divides(info->fix.ywrapstep, vc->vc_font.height)
1851 && divides(vc->vc_font.height, info->var.yres_virtual);
1852 int reading_fast = cap & FBINFO_READS_FAST;
1853 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1854 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1855
1856 p->vrows = info->var.yres_virtual/fh;
1857 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1858 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1859 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1860 info->var.yres % fh))
1861 p->vrows--;
1862
1863 if (good_wrap || good_pan) {
1864 if (reading_fast || fast_copyarea)
1865 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1866 else
1867 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1868 SCROLL_PAN_REDRAW;
1869 } else {
1870 if (reading_fast || (fast_copyarea && !fast_imageblit))
1871 p->scrollmode = SCROLL_MOVE;
1872 else
1873 p->scrollmode = SCROLL_REDRAW;
1874 }
1875}
1876
1877static int fbcon_resize(struct vc_data *vc, unsigned int width,
1878 unsigned int height)
1879{
1880 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1881 struct display *p = &fb_display[vc->vc_num];
1882 struct fb_var_screeninfo var = info->var;
1883 int x_diff, y_diff;
1884 int fw = vc->vc_font.width;
1885 int fh = vc->vc_font.height;
1886
1887 var.xres = width * fw;
1888 var.yres = height * fh;
1889 x_diff = info->var.xres - var.xres;
1890 y_diff = info->var.yres - var.yres;
1891 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1892 struct fb_videomode *mode;
1893
1894 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1895 mode = fb_find_best_mode(&var, &info->modelist);
1896 if (mode == NULL)
1897 return -EINVAL;
3084a895 1898 display_to_var(&var, p);
1da177e4 1899 fb_videomode_to_var(&var, mode);
3084a895 1900
1da177e4
LT		 1901 if (width > var.xres/fw || height > var.yres/fh)
1902 return -EINVAL;
1da177e4
LT		 1903
1904 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1905 if (CON_IS_VISIBLE(vc)) {
1906 var.activate = FB_ACTIVATE_NOW |
1907 FB_ACTIVATE_FORCE;
1908 fb_set_var(info, &var);
1909 }
1910 var_to_display(p, &info->var, info);
1911 }
1912 updatescrollmode(p, info, vc);
1913 return 0;
1914}
1915
1916static int fbcon_switch(struct vc_data *vc)
1917{
88fb2c6e 1918 struct fb_info *info, *old_info = NULL;
1da177e4
LT		 1919 struct display *p = &fb_display[vc->vc_num];
1920 struct fb_var_screeninfo var;
1921 int i, prev_console;
1922
1923 info = registered_fb[con2fb_map[vc->vc_num]];
1924
1925 if (softback_top) {
1da177e4
LT		 1926 if (softback_lines)
1927 fbcon_set_origin(vc);
1928 softback_top = softback_curr = softback_in = softback_buf;
1929 softback_lines = 0;
4d9c5b6e 1930 fbcon_update_softback(vc);
1da177e4
LT		 1931 }
1932
1933 if (logo_shown >= 0) {
1934 struct vc_data *conp2 = vc_cons[logo_shown].d;
1935
1936 if (conp2->vc_top == logo_lines
1937 && conp2->vc_bottom == conp2->vc_rows)
1938 conp2->vc_top = 0;
1939 logo_shown = FBCON_LOGO_CANSHOW;
1940 }
1941
1942 prev_console = ((struct fbcon_ops *)info->fbcon_par)->currcon;
88fb2c6e
AD		 1943 if (prev_console != -1)
1944 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 1945 /*
1946 * FIXME: If we have multiple fbdev's loaded, we need to
1947 * update all info->currcon. Perhaps, we can place this
1948 * in a centralized structure, but this might break some
1949 * drivers.
1950 *
1951 * info->currcon = vc->vc_num;
1952 */
1953 for (i = 0; i < FB_MAX; i++) {
1954 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
1955 struct fbcon_ops *ops = registered_fb[i]->fbcon_par;
1956
1957 ops->currcon = vc->vc_num;
1958 }
1959 }
1960 memset(&var, 0, sizeof(struct fb_var_screeninfo));
1961 display_to_var(&var, p);
1962 var.activate = FB_ACTIVATE_NOW;
1963
1964 /*
1965 * make sure we don't unnecessarily trip the memcmp()
1966 * in fb_set_var()
1967 */
1968 info->var.activate = var.activate;
1969 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
1970 fb_set_var(info, &var);
1971
88fb2c6e
AD		 1972 if (old_info != NULL && old_info != info) {
1973 if (info->fbops->fb_set_par)
1974 info->fbops->fb_set_par(info);
1975 fbcon_del_cursor_timer(old_info);
1976 fbcon_add_cursor_timer(info);
1977 }
1da177e4
LT		 1978
1979 set_blitting_type(vc, info, p);
1980 ((struct fbcon_ops *)info->fbcon_par)->cursor_reset = 1;
1981
b8c90945 1982 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1983 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1984 updatescrollmode(p, info, vc);
1985
1986 switch (p->scrollmode) {
1987 case SCROLL_WRAP_MOVE:
1988 scrollback_phys_max = p->vrows - vc->vc_rows;
1989 break;
1990 case SCROLL_PAN_MOVE:
1991 case SCROLL_PAN_REDRAW:
1992 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
1993 if (scrollback_phys_max < 0)
1994 scrollback_phys_max = 0;
1995 break;
1996 default:
1997 scrollback_phys_max = 0;
1998 break;
1999 }
2000 scrollback_max = 0;
2001 scrollback_current = 0;
2002
2003 update_var(vc->vc_num, info);
2004 fbcon_set_palette(vc, color_table);
2005 fbcon_clear_margins(vc, 0);
2006
2007 if (logo_shown == FBCON_LOGO_DRAW) {
2008
2009 logo_shown = fg_console;
2010 /* This is protected above by initmem_freed */
2011 fb_show_logo(info);
2012 update_region(vc,
2013 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2014 vc->vc_size_row * (vc->vc_bottom -
2015 vc->vc_top) / 2);
2016 return 0;
2017 }
2018 return 1;
2019}
2020
2021static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2022 int blank)
2023{
2024 if (blank) {
2025 unsigned short charmask = vc->vc_hi_font_mask ?
2026 0x1ff : 0xff;
2027 unsigned short oldc;
2028
2029 oldc = vc->vc_video_erase_char;
2030 vc->vc_video_erase_char &= charmask;
2031 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2032 vc->vc_video_erase_char = oldc;
2033 }
2034}
2035
2036static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2037{
2038 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2039 struct fbcon_ops *ops = info->fbcon_par;
2040
2041 if (mode_switch) {
2042 struct fb_var_screeninfo var = info->var;
2043
2044 ops->graphics = 1;
2045
2046 if (!blank) {
2047 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2048 fb_set_var(info, &var);
2049 ops->graphics = 0;
2050 }
2051 }
2052
2053 if (!fbcon_is_inactive(vc, info)) {
2054 if (ops->blank_state != blank) {
2055 ops->blank_state = blank;
2056 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2057 ops->cursor_flash = (!blank);
2058
2059 if (fb_blank(info, blank))
2060 fbcon_generic_blank(vc, info, blank);
2061 }
2062
88fb2c6e
AD		 2063 if (!blank)
2064 update_screen(vc);
2065 }
2066
2067 if (!blank)
2068 fbcon_add_cursor_timer(info);
2069 else
2070 fbcon_del_cursor_timer(info);
1da177e4 2071
88fb2c6e 2072 return 0;
1da177e4
LT		 2073}
2074
2075static void fbcon_free_font(struct display *p)
2076{
2077 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2078 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2079 p->fontdata = NULL;
2080 p->userfont = 0;
2081}
2082
2083static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2084{
2085 u8 *fontdata = vc->vc_font.data;
2086 u8 *data = font->data;
2087 int i, j;
2088
2089 font->width = vc->vc_font.width;
2090 font->height = vc->vc_font.height;
2091 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2092 if (!font->data)
2093 return 0;
2094
2095 if (font->width <= 8) {
2096 j = vc->vc_font.height;
2097 for (i = 0; i < font->charcount; i++) {
2098 memcpy(data, fontdata, j);
2099 memset(data + j, 0, 32 - j);
2100 data += 32;
2101 fontdata += j;
2102 }
2103 } else if (font->width <= 16) {
2104 j = vc->vc_font.height * 2;
2105 for (i = 0; i < font->charcount; i++) {
2106 memcpy(data, fontdata, j);
2107 memset(data + j, 0, 64 - j);
2108 data += 64;
2109 fontdata += j;
2110 }
2111 } else if (font->width <= 24) {
2112 for (i = 0; i < font->charcount; i++) {
2113 for (j = 0; j < vc->vc_font.height; j++) {
2114 *data++ = fontdata[0];
2115 *data++ = fontdata[1];
2116 *data++ = fontdata[2];
2117 fontdata += sizeof(u32);
2118 }
2119 memset(data, 0, 3 * (32 - j));
2120 data += 3 * (32 - j);
2121 }
2122 } else {
2123 j = vc->vc_font.height * 4;
2124 for (i = 0; i < font->charcount; i++) {
2125 memcpy(data, fontdata, j);
2126 memset(data + j, 0, 128 - j);
2127 data += 128;
2128 fontdata += j;
2129 }
2130 }
2131 return 0;
2132}
2133
2134static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2135 const u8 * data, int userfont)
1da177e4
LT		 2136{
2137 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2138 struct display *p = &fb_display[vc->vc_num];
2139 int resize;
2140 int cnt;
2141 char *old_data = NULL;
2142
2143 if (CON_IS_VISIBLE(vc) && softback_lines)
2144 fbcon_set_origin(vc);
2145
2146 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2147 if (p->userfont)
2148 old_data = vc->vc_font.data;
2149 if (userfont)
2150 cnt = FNTCHARCNT(data);
2151 else
2152 cnt = 256;
2f4516db 2153 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2154 if ((p->userfont = userfont))
2155 REFCOUNT(data)++;
2156 vc->vc_font.width = w;
2157 vc->vc_font.height = h;
2158 if (vc->vc_hi_font_mask && cnt == 256) {
2159 vc->vc_hi_font_mask = 0;
2160 if (vc->vc_can_do_color) {
2161 vc->vc_complement_mask >>= 1;
2162 vc->vc_s_complement_mask >>= 1;
2163 }
2164
2165 /* ++Edmund: reorder the attribute bits */
2166 if (vc->vc_can_do_color) {
2167 unsigned short *cp =
2168 (unsigned short *) vc->vc_origin;
2169 int count = vc->vc_screenbuf_size / 2;
2170 unsigned short c;
2171 for (; count > 0; count--, cp++) {
2172 c = scr_readw(cp);
2173 scr_writew(((c & 0xfe00) >> 1) |
2174 (c & 0xff), cp);
2175 }
2176 c = vc->vc_video_erase_char;
2177 vc->vc_video_erase_char =
2178 ((c & 0xfe00) >> 1) | (c & 0xff);
2179 vc->vc_attr >>= 1;
2180 }
2181 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2182 vc->vc_hi_font_mask = 0x100;
2183 if (vc->vc_can_do_color) {
2184 vc->vc_complement_mask <<= 1;
2185 vc->vc_s_complement_mask <<= 1;
2186 }
2187
2188 /* ++Edmund: reorder the attribute bits */
2189 {
2190 unsigned short *cp =
2191 (unsigned short *) vc->vc_origin;
2192 int count = vc->vc_screenbuf_size / 2;
2193 unsigned short c;
2194 for (; count > 0; count--, cp++) {
2195 unsigned short newc;
2196 c = scr_readw(cp);
2197 if (vc->vc_can_do_color)
2198 newc =
2199 ((c & 0xff00) << 1) | (c &
2200 0xff);
2201 else
2202 newc = c & ~0x100;
2203 scr_writew(newc, cp);
2204 }
2205 c = vc->vc_video_erase_char;
2206 if (vc->vc_can_do_color) {
2207 vc->vc_video_erase_char =
2208 ((c & 0xff00) << 1) | (c & 0xff);
2209 vc->vc_attr <<= 1;
2210 } else
2211 vc->vc_video_erase_char = c & ~0x100;
2212 }
2213
2214 }
2215
2216 if (resize) {
2217 /* reset wrap/pan */
2218 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2219 vc_resize(vc, info->var.xres / w, info->var.yres / h);
4d9c5b6e
AD		 2220 if (CON_IS_VISIBLE(vc) && softback_buf)
2221 fbcon_update_softback(vc);
1da177e4
LT		 2222 } else if (CON_IS_VISIBLE(vc)
2223 && vc->vc_mode == KD_TEXT) {
2224 fbcon_clear_margins(vc, 0);
2225 update_screen(vc);
2226 }
2227
2228 if (old_data && (--REFCOUNT(old_data) == 0))
2229 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2230 return 0;
2231}
2232
2233static int fbcon_copy_font(struct vc_data *vc, int con)
2234{
2235 struct display *od = &fb_display[con];
2236 struct console_font *f = &vc->vc_font;
2237
2238 if (od->fontdata == f->data)
2239 return 0; /* already the same font... */
2240 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2241}
2242
2243/*
2244 * User asked to set font; we are guaranteed that
2245 * a) width and height are in range 1..32
2246 * b) charcount does not exceed 512
2247 * but lets not assume that, since someone might someday want to use larger
2248 * fonts. And charcount of 512 is small for unicode support.
2249 *
2250 * However, user space gives the font in 32 rows , regardless of
2251 * actual font height. So a new API is needed if support for larger fonts
2252 * is ever implemented.
2253 */
2254
2255static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2256{
2257 unsigned charcount = font->charcount;
2258 int w = font->width;
2259 int h = font->height;
2260 int size;
2261 int i, csum;
2262 u8 *new_data, *data = font->data;
2263 int pitch = (font->width+7) >> 3;
2264
2265 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2266 * If not this check should be changed to charcount < 256 */
2267 if (charcount != 256 && charcount != 512)
2268 return -EINVAL;
2269
2270 size = h * pitch * charcount;
2271
2272 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2273
2274 if (!new_data)
2275 return -ENOMEM;
2276
2277 new_data += FONT_EXTRA_WORDS * sizeof(int);
2278 FNTSIZE(new_data) = size;
2279 FNTCHARCNT(new_data) = charcount;
2280 REFCOUNT(new_data) = 0; /* usage counter */
2281 for (i=0; i< charcount; i++) {
2282 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2283 }
2284
2285 /* Since linux has a nice crc32 function use it for counting font
2286 * checksums. */
2287 csum = crc32(0, new_data, size);
2288
2289 FNTSUM(new_data) = csum;
2290 /* Check if the same font is on some other console already */
2291 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2292 struct vc_data *tmp = vc_cons[i].d;
2293
2294 if (fb_display[i].userfont &&
2295 fb_display[i].fontdata &&
2296 FNTSUM(fb_display[i].fontdata) == csum &&
2297 FNTSIZE(fb_display[i].fontdata) == size &&
2298 tmp->vc_font.width == w &&
2299 !memcmp(fb_display[i].fontdata, new_data, size)) {
2300 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2301 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2302 break;
2303 }
2304 }
2305 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2306}
2307
2308static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2309{
2310 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2311 const struct font_desc *f;
1da177e4
LT		 2312
2313 if (!name)
2314 f = get_default_font(info->var.xres, info->var.yres);
2315 else if (!(f = find_font(name)))
2316 return -ENOENT;
2317
2318 font->width = f->width;
2319 font->height = f->height;
2320 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2321}
2322
2323static u16 palette_red[16];
2324static u16 palette_green[16];
2325static u16 palette_blue[16];
2326
2327static struct fb_cmap palette_cmap = {
2328 0, 16, palette_red, palette_green, palette_blue, NULL
2329};
2330
2331static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2332{
2333 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2334 int i, j, k, depth;
2335 u8 val;
2336
2337 if (fbcon_is_inactive(vc, info))
2338 return -EINVAL;
2339
2340 if (!CON_IS_VISIBLE(vc))
2341 return 0;
2342
b8c90945 2343 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2344 if (depth > 3) {
2345 for (i = j = 0; i < 16; i++) {
2346 k = table[i];
2347 val = vc->vc_palette[j++];
2348 palette_red[k] = (val << 8) | val;
2349 val = vc->vc_palette[j++];
2350 palette_green[k] = (val << 8) | val;
2351 val = vc->vc_palette[j++];
2352 palette_blue[k] = (val << 8) | val;
2353 }
2354 palette_cmap.len = 16;
2355 palette_cmap.start = 0;
2356 /*
2357 * If framebuffer is capable of less than 16 colors,
2358 * use default palette of fbcon.
2359 */
2360 } else
2361 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2362
2363 return fb_set_cmap(&palette_cmap, info);
2364}
2365
2366static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2367{
2368 unsigned long p;
2369 int line;
2370
2371 if (vc->vc_num != fg_console || !softback_lines)
2372 return (u16 *) (vc->vc_origin + offset);
2373 line = offset / vc->vc_size_row;
2374 if (line >= softback_lines)
2375 return (u16 *) (vc->vc_origin + offset -
2376 softback_lines * vc->vc_size_row);
2377 p = softback_curr + offset;
2378 if (p >= softback_end)
2379 p += softback_buf - softback_end;
2380 return (u16 *) p;
2381}
2382
2383static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2384 int *px, int *py)
2385{
2386 unsigned long ret;
2387 int x, y;
2388
2389 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2390 unsigned long offset = (pos - vc->vc_origin) / 2;
2391
2392 x = offset % vc->vc_cols;
2393 y = offset / vc->vc_cols;
2394 if (vc->vc_num == fg_console)
2395 y += softback_lines;
2396 ret = pos + (vc->vc_cols - x) * 2;
2397 } else if (vc->vc_num == fg_console && softback_lines) {
2398 unsigned long offset = pos - softback_curr;
2399
2400 if (pos < softback_curr)
2401 offset += softback_end - softback_buf;
2402 offset /= 2;
2403 x = offset % vc->vc_cols;
2404 y = offset / vc->vc_cols;
2405 ret = pos + (vc->vc_cols - x) * 2;
2406 if (ret == softback_end)
2407 ret = softback_buf;
2408 if (ret == softback_in)
2409 ret = vc->vc_origin;
2410 } else {
2411 /* Should not happen */
2412 x = y = 0;
2413 ret = vc->vc_origin;
2414 }
2415 if (px)
2416 *px = x;
2417 if (py)
2418 *py = y;
2419 return ret;
2420}
2421
2422/* As we might be inside of softback, we may work with non-contiguous buffer,
2423 that's why we have to use a separate routine. */
2424static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2425{
2426 while (cnt--) {
2427 u16 a = scr_readw(p);
2428 if (!vc->vc_can_do_color)
2429 a ^= 0x0800;
2430 else if (vc->vc_hi_font_mask == 0x100)
2431 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2432 (((a) & 0x0e00) << 4);
2433 else
2434 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2435 (((a) & 0x0700) << 4);
2436 scr_writew(a, p++);
2437 if (p == (u16 *) softback_end)
2438 p = (u16 *) softback_buf;
2439 if (p == (u16 *) softback_in)
2440 p = (u16 *) vc->vc_origin;
2441 }
2442}
2443
2444static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2445{
2446 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2447 struct display *p = &fb_display[fg_console];
2448 int offset, limit, scrollback_old;
2449
2450 if (softback_top) {
2451 if (vc->vc_num != fg_console)
2452 return 0;
2453 if (vc->vc_mode != KD_TEXT || !lines)
2454 return 0;
2455 if (logo_shown >= 0) {
2456 struct vc_data *conp2 = vc_cons[logo_shown].d;
2457
2458 if (conp2->vc_top == logo_lines
2459 && conp2->vc_bottom == conp2->vc_rows)
2460 conp2->vc_top = 0;
2461 if (logo_shown == vc->vc_num) {
2462 unsigned long p, q;
2463 int i;
2464
2465 p = softback_in;
2466 q = vc->vc_origin +
2467 logo_lines * vc->vc_size_row;
2468 for (i = 0; i < logo_lines; i++) {
2469 if (p == softback_top)
2470 break;
2471 if (p == softback_buf)
2472 p = softback_end;
2473 p -= vc->vc_size_row;
2474 q -= vc->vc_size_row;
2475 scr_memcpyw((u16 *) q, (u16 *) p,
2476 vc->vc_size_row);
2477 }
2478 softback_in = p;
2479 update_region(vc, vc->vc_origin,
2480 logo_lines * vc->vc_cols);
2481 }
2482 logo_shown = FBCON_LOGO_CANSHOW;
2483 }
2484 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2485 fbcon_redraw_softback(vc, p, lines);
2486 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2487 return 0;
2488 }
2489
2490 if (!scrollback_phys_max)
2491 return -ENOSYS;
2492
2493 scrollback_old = scrollback_current;
2494 scrollback_current -= lines;
2495 if (scrollback_current < 0)
2496 scrollback_current = 0;
2497 else if (scrollback_current > scrollback_max)
2498 scrollback_current = scrollback_max;
2499 if (scrollback_current == scrollback_old)
2500 return 0;
2501
2502 if (fbcon_is_inactive(vc, info))
2503 return 0;
2504
2505 fbcon_cursor(vc, CM_ERASE);
2506
2507 offset = p->yscroll - scrollback_current;
2508 limit = p->vrows;
2509 switch (p->scrollmode) {
2510 case SCROLL_WRAP_MOVE:
2511 info->var.vmode |= FB_VMODE_YWRAP;
2512 break;
2513 case SCROLL_PAN_MOVE:
2514 case SCROLL_PAN_REDRAW:
2515 limit -= vc->vc_rows;
2516 info->var.vmode &= ~FB_VMODE_YWRAP;
2517 break;
2518 }
2519 if (offset < 0)
2520 offset += limit;
2521 else if (offset >= limit)
2522 offset -= limit;
2523 info->var.xoffset = 0;
2524 info->var.yoffset = offset * vc->vc_font.height;
2525 update_var(vc->vc_num, info);
2526 if (!scrollback_current)
2527 fbcon_cursor(vc, CM_DRAW);
2528 return 0;
2529}
2530
2531static int fbcon_set_origin(struct vc_data *vc)
2532{
2533 if (softback_lines)
2534 fbcon_scrolldelta(vc, softback_lines);
2535 return 0;
2536}
2537
2538static void fbcon_suspended(struct fb_info *info)
2539{
2540 struct vc_data *vc = NULL;
2541 struct fbcon_ops *ops = info->fbcon_par;
2542
2543 if (!ops || ops->currcon < 0)
2544 return;
2545 vc = vc_cons[ops->currcon].d;
2546
2547 /* Clear cursor, restore saved data */
2548 fbcon_cursor(vc, CM_ERASE);
2549}
2550
2551static void fbcon_resumed(struct fb_info *info)
2552{
2553 struct vc_data *vc;
2554 struct fbcon_ops *ops = info->fbcon_par;
2555
2556 if (!ops || ops->currcon < 0)
2557 return;
2558 vc = vc_cons[ops->currcon].d;
2559
2560 update_screen(vc);
2561}
2562
2563static void fbcon_modechanged(struct fb_info *info)
2564{
2565 struct fbcon_ops *ops = info->fbcon_par;
2566 struct vc_data *vc;
2567 struct display *p;
2568 int rows, cols;
2569
2570 if (!ops || ops->currcon < 0)
2571 return;
2572 vc = vc_cons[ops->currcon].d;
2573 if (vc->vc_mode != KD_TEXT || registered_fb[con2fb_map[ops->currcon]] != info)
2574 return;
2575
2576 p = &fb_display[vc->vc_num];
2577
2578 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2579
2580 if (CON_IS_VISIBLE(vc)) {
2581 var_to_display(p, &info->var, info);
2582 cols = info->var.xres / vc->vc_font.width;
2583 rows = info->var.yres / vc->vc_font.height;
2584 vc_resize(vc, cols, rows);
2585 updatescrollmode(p, info, vc);
2586 scrollback_max = 0;
2587 scrollback_current = 0;
2588 update_var(vc->vc_num, info);
2589 fbcon_set_palette(vc, color_table);
2590 update_screen(vc);
4d9c5b6e
AD		 2591 if (softback_buf)
2592 fbcon_update_softback(vc);
1da177e4
LT		 2593 }
2594}
2595
7726e9e1
AD		 2596static void fbcon_set_all_vcs(struct fb_info *info)
2597{
2598 struct fbcon_ops *ops = info->fbcon_par;
2599 struct vc_data *vc;
2600 struct display *p;
2601 int i, rows, cols;
2602
2603 if (!ops || ops->currcon < 0)
2604 return;
2605
2606 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2607 vc = vc_cons[i].d;
2608 if (!vc || vc->vc_mode != KD_TEXT ||
2609 registered_fb[con2fb_map[i]] != info)
2610 continue;
2611
2612 p = &fb_display[vc->vc_num];
2613
2614 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2615 var_to_display(p, &info->var, info);
2616 cols = info->var.xres / vc->vc_font.width;
2617 rows = info->var.yres / vc->vc_font.height;
2618 vc_resize(vc, cols, rows);
2619
2620 if (CON_IS_VISIBLE(vc)) {
2621 updatescrollmode(p, info, vc);
2622 scrollback_max = 0;
2623 scrollback_current = 0;
2624 update_var(vc->vc_num, info);
2625 fbcon_set_palette(vc, color_table);
2626 update_screen(vc);
4d9c5b6e
AD		 2627 if (softback_buf)
2628 fbcon_update_softback(vc);
7726e9e1
AD		 2629 }
2630 }
2631}
2632
1da177e4
LT		 2633static int fbcon_mode_deleted(struct fb_info *info,
2634 struct fb_videomode *mode)
2635{
2636 struct fb_info *fb_info;
2637 struct display *p;
2638 int i, j, found = 0;
2639
2640 /* before deletion, ensure that mode is not in use */
2641 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2642 j = con2fb_map[i];
2643 if (j == -1)
2644 continue;
2645 fb_info = registered_fb[j];
2646 if (fb_info != info)
2647 continue;
2648 p = &fb_display[i];
2649 if (!p || !p->mode)
2650 continue;
2651 if (fb_mode_is_equal(p->mode, mode)) {
2652 found = 1;
2653 break;
2654 }
2655 }
2656 return found;
2657}
2658
2659static int fbcon_fb_registered(int idx)
2660{
2661 int ret = 0, i;
2662
2663 if (info_idx == -1) {
2664 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2665 if (con2fb_map_boot[i] == idx) {
2666 info_idx = idx;
2667 break;
2668 }
2669 }
2670 if (info_idx != -1)
2671 ret = fbcon_takeover(1);
2672 } else {
2673 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2674 if (con2fb_map_boot[i] == idx)
2675 set_con2fb_map(i, idx, 0);
2676 }
2677 }
2678
2679 return ret;
2680}
2681
2682static void fbcon_fb_blanked(struct fb_info *info, int blank)
2683{
2684 struct fbcon_ops *ops = info->fbcon_par;
2685 struct vc_data *vc;
2686
2687 if (!ops || ops->currcon < 0)
2688 return;
2689
2690 vc = vc_cons[ops->currcon].d;
2691 if (vc->vc_mode != KD_TEXT ||
2692 registered_fb[con2fb_map[ops->currcon]] != info)
2693 return;
2694
2695 if (CON_IS_VISIBLE(vc)) {
2696 if (blank)
2697 do_blank_screen(0);
2698 else
2699 do_unblank_screen(0);
2700 }
2701 ops->blank_state = blank;
2702}
2703
2704static void fbcon_new_modelist(struct fb_info *info)
2705{
2706 int i;
2707 struct vc_data *vc;
2708 struct fb_var_screeninfo var;
2709 struct fb_videomode *mode;
2710
2711 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2712 if (registered_fb[con2fb_map[i]] != info)
2713 continue;
2714 if (!fb_display[i].mode)
2715 continue;
2716 vc = vc_cons[i].d;
2717 display_to_var(&var, &fb_display[i]);
2718 mode = fb_find_nearest_mode(&var, &info->modelist);
2719 fb_videomode_to_var(&var, mode);
2720
2721 if (vc)
2722 fbcon_set_disp(info, &var, vc);
2723 else
2724 fbcon_preset_disp(info, &var, i);
2725
2726 }
2727}
2728
2729static int fbcon_event_notify(struct notifier_block *self,
2730 unsigned long action, void *data)
2731{
2732 struct fb_event *event = data;
2733 struct fb_info *info = event->info;
2734 struct fb_videomode *mode;
2735 struct fb_con2fbmap *con2fb;
2736 int ret = 0;
2737
2738 switch(action) {
2739 case FB_EVENT_SUSPEND:
2740 fbcon_suspended(info);
2741 break;
2742 case FB_EVENT_RESUME:
2743 fbcon_resumed(info);
2744 break;
2745 case FB_EVENT_MODE_CHANGE:
2746 fbcon_modechanged(info);
2747 break;
7726e9e1
AD		 2748 case FB_EVENT_MODE_CHANGE_ALL:
2749 fbcon_set_all_vcs(info);
2750 break;
1da177e4
LT		 2751 case FB_EVENT_MODE_DELETE:
2752 mode = event->data;
2753 ret = fbcon_mode_deleted(info, mode);
2754 break;
2755 case FB_EVENT_FB_REGISTERED:
2756 ret = fbcon_fb_registered(info->node);
2757 break;
2758 case FB_EVENT_SET_CONSOLE_MAP:
2759 con2fb = event->data;
2760 ret = set_con2fb_map(con2fb->console - 1,
2761 con2fb->framebuffer, 1);
2762 break;
2763 case FB_EVENT_GET_CONSOLE_MAP:
2764 con2fb = event->data;
2765 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2766 break;
2767 case FB_EVENT_BLANK:
2768 fbcon_fb_blanked(info, *(int *)event->data);
2769 break;
2770 case FB_EVENT_NEW_MODELIST:
2771 fbcon_new_modelist(info);
2772 break;
2773 }
2774
2775 return ret;
2776}
2777
2778/*
2779 * The console `switch' structure for the frame buffer based console
2780 */
2781
2782static const struct consw fb_con = {
2783 .owner = THIS_MODULE,
2784 .con_startup = fbcon_startup,
2785 .con_init = fbcon_init,
2786 .con_deinit = fbcon_deinit,
2787 .con_clear = fbcon_clear,
2788 .con_putc = fbcon_putc,
2789 .con_putcs = fbcon_putcs,
2790 .con_cursor = fbcon_cursor,
2791 .con_scroll = fbcon_scroll,
2792 .con_bmove = fbcon_bmove,
2793 .con_switch = fbcon_switch,
2794 .con_blank = fbcon_blank,
2795 .con_font_set = fbcon_set_font,
2796 .con_font_get = fbcon_get_font,
2797 .con_font_default = fbcon_set_def_font,
2798 .con_font_copy = fbcon_copy_font,
2799 .con_set_palette = fbcon_set_palette,
2800 .con_scrolldelta = fbcon_scrolldelta,
2801 .con_set_origin = fbcon_set_origin,
2802 .con_invert_region = fbcon_invert_region,
2803 .con_screen_pos = fbcon_screen_pos,
2804 .con_getxy = fbcon_getxy,
2805 .con_resize = fbcon_resize,
2806};
2807
2808static struct notifier_block fbcon_event_notifier = {
2809 .notifier_call = fbcon_event_notify,
2810};
2811
2812static int __init fb_console_init(void)
2813{
2814 int i;
2815
2816 acquire_console_sem();
2817 fb_register_client(&fbcon_event_notifier);
2818 release_console_sem();
2819
2820 for (i = 0; i < MAX_NR_CONSOLES; i++)
2821 con2fb_map[i] = -1;
2822
2823 if (num_registered_fb) {
2824 for (i = 0; i < FB_MAX; i++) {
2825 if (registered_fb[i] != NULL) {
2826 info_idx = i;
2827 break;
2828 }
2829 }
2830 fbcon_takeover(0);
2831 }
2832
2833 return 0;
2834}
2835
2836module_init(fb_console_init);
2837
2838#ifdef MODULE
2839
2840static void __exit fb_console_exit(void)
2841{
2842 acquire_console_sem();
2843 fb_unregister_client(&fbcon_event_notifier);
2844 release_console_sem();
2845 give_up_console(&fb_con);
2846}
2847
2848module_exit(fb_console_exit);
2849
2850#endif
2851
2852MODULE_LICENSE("GPL");
ubuntu-zesty-kernel mirror