]> 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] Detaching fbcon: add capability to attach/detach fbcon
[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
ab767201 109static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 110
1da177e4
LT		 111static signed char con2fb_map[MAX_NR_CONSOLES];
112static signed char con2fb_map_boot[MAX_NR_CONSOLES];
113static int logo_height;
114static int logo_lines;
115/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
116 enums. */
117static int logo_shown = FBCON_LOGO_CANSHOW;
118/* Software scrollback */
119static int fbcon_softback_size = 32768;
120static unsigned long softback_buf, softback_curr;
121static unsigned long softback_in;
122static unsigned long softback_top, softback_end;
123static int softback_lines;
124/* console mappings */
125static int first_fb_vc;
126static int last_fb_vc = MAX_NR_CONSOLES - 1;
127static int fbcon_is_default = 1;
128/* font data */
129static char fontname[40];
130
131/* current fb_info */
132static int info_idx = -1;
133
e4fc2761
AD		 134/* console rotation */
135static int rotate;
136
1da177e4
LT		 137static const struct consw fb_con;
138
139#define CM_SOFTBACK (8)
140
141#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
142
143static void fbcon_free_font(struct display *);
144static int fbcon_set_origin(struct vc_data *);
145
146#define CURSOR_DRAW_DELAY (1)
147
148/* # VBL ints between cursor state changes */
1da177e4
LT		 149#define ATARI_CURSOR_BLINK_RATE (42)
150#define MAC_CURSOR_BLINK_RATE (32)
151#define DEFAULT_CURSOR_BLINK_RATE (20)
152
153static int vbl_cursor_cnt;
154
155#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
156
157/*
158 * Interface used by the world
159 */
160
161static const char *fbcon_startup(void);
162static void fbcon_init(struct vc_data *vc, int init);
163static void fbcon_deinit(struct vc_data *vc);
164static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
165 int width);
166static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
167static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
168 int count, int ypos, int xpos);
169static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
170static void fbcon_cursor(struct vc_data *vc, int mode);
171static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
172 int count);
173static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
174 int height, int width);
175static int fbcon_switch(struct vc_data *vc);
176static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
177static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
178static int fbcon_scrolldelta(struct vc_data *vc, int lines);
179
180/*
181 * Internal routines
182 */
1da177e4
LT		 183static __inline__ void ywrap_up(struct vc_data *vc, int count);
184static __inline__ void ywrap_down(struct vc_data *vc, int count);
185static __inline__ void ypan_up(struct vc_data *vc, int count);
186static __inline__ void ypan_down(struct vc_data *vc, int count);
187static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
188 int dy, int dx, int height, int width, u_int y_break);
189static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 struct vc_data *vc);
191static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 int unit);
193static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
194 int line, int count, int dy);
a812c94b
AD		 195static void fbcon_modechanged(struct fb_info *info);
196static void fbcon_set_all_vcs(struct fb_info *info);
5428b044
AD		 197static void fbcon_start(void);
198static void fbcon_exit(void);
9a179176
AD		 199static struct class_device *fbcon_class_device;
200
1da177e4
LT		 201#ifdef CONFIG_MAC
202/*
203 * On the Macintoy, there may or may not be a working VBL int. We need to probe
204 */
205static int vbl_detected;
206
207static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
208{
209 vbl_detected++;
210 return IRQ_HANDLED;
211}
212#endif
213
dbcbfe1e 214#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 215static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 216{
217 struct fbcon_ops *ops = info->fbcon_par;
218
219 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 220 ops->p->con_rotate < 4)
221 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 222 else
223 ops->rotate = 0;
224}
a812c94b
AD		 225
226static void fbcon_rotate(struct fb_info *info, u32 rotate)
227{
228 struct fbcon_ops *ops= info->fbcon_par;
229 struct fb_info *fb_info;
230
231 if (!ops || ops->currcon == -1)
232 return;
233
234 fb_info = registered_fb[con2fb_map[ops->currcon]];
235
236 if (info == fb_info) {
237 struct display *p = &fb_display[ops->currcon];
238
239 if (rotate < 4)
240 p->con_rotate = rotate;
241 else
242 p->con_rotate = 0;
243
244 fbcon_modechanged(info);
245 }
246}
247
248static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
249{
250 struct fbcon_ops *ops = info->fbcon_par;
251 struct vc_data *vc;
252 struct display *p;
253 int i;
254
255 if (!ops || ops->currcon < 0 || rotate > 3)
256 return;
257
258 for (i = 0; i < MAX_NR_CONSOLES; i++) {
259 vc = vc_cons[i].d;
260 if (!vc || vc->vc_mode != KD_TEXT ||
261 registered_fb[con2fb_map[i]] != info)
262 continue;
263
264 p = &fb_display[vc->vc_num];
265 p->con_rotate = rotate;
266 }
267
268 fbcon_set_all_vcs(info);
269}
dbcbfe1e 270#else
b73deed3 271static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 272{
273 struct fbcon_ops *ops = info->fbcon_par;
274
275 ops->rotate = FB_ROTATE_UR;
276}
a812c94b
AD		 277
278static void fbcon_rotate(struct fb_info *info, u32 rotate)
279{
280 return;
281}
282
283static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
284{
285 return;
286}
dbcbfe1e 287#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 288
a812c94b
AD		 289static int fbcon_get_rotate(struct fb_info *info)
290{
291 struct fbcon_ops *ops = info->fbcon_par;
292
293 return (ops) ? ops->rotate : 0;
294}
295
1da177e4
LT		 296static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
297{
298 struct fbcon_ops *ops = info->fbcon_par;
299
300 return (info->state != FBINFO_STATE_RUNNING ||
301 vc->vc_mode != KD_TEXT || ops->graphics);
302}
303
304static inline int get_color(struct vc_data *vc, struct fb_info *info,
305 u16 c, int is_fg)
306{
b8c90945 307 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 308 int color = 0;
309
310 if (console_blanked) {
311 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
312
313 c = vc->vc_video_erase_char & charmask;
314 }
315
316 if (depth != 1)
317 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
318 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
319
320 switch (depth) {
321 case 1:
322 {
b8c90945
AD		 323 int col = ~(0xfff << (max(info->var.green.length,
324 max(info->var.red.length,
325 info->var.blue.length)))) & 0xff;
326
1da177e4 327 /* 0 or 1 */
b8c90945
AD		 328 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
329 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 330
331 if (console_blanked)
332 fg = bg;
333
334 color = (is_fg) ? fg : bg;
335 break;
336 }
337 case 2:
338 /*
339 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 340 * is grayscale. However, simply dividing the values by 4
341 * will not work, as colors 1, 2 and 3 will be scaled-down
342 * to zero rendering them invisible. So empirically convert
343 * colors to a sane 4-level grayscale.
1da177e4 344 */
2cc38ed1
AD		 345 switch (color) {
346 case 0:
347 color = 0; /* black */
348 break;
349 case 1 ... 6:
350 color = 2; /* white */
351 break;
352 case 7 ... 8:
353 color = 1; /* gray */
354 break;
355 default:
356 color = 3; /* intense white */
357 break;
358 }
359 break;
1da177e4
LT		 360 case 3:
361 /*
362 * Last 8 entries of default 16-color palette is a more intense
363 * version of the first 8 (i.e., same chrominance, different
364 * luminance).
365 */
366 color &= 7;
367 break;
368 }
369
370
371 return color;
372}
373
4d9c5b6e
AD		 374static void fbcon_update_softback(struct vc_data *vc)
375{
376 int l = fbcon_softback_size / vc->vc_size_row;
377
378 if (l > 5)
379 softback_end = softback_buf + l * vc->vc_size_row;
380 else
381 /* Smaller scrollback makes no sense, and 0 would screw
382 the operation totally */
383 softback_top = 0;
384}
385
1da177e4
LT		 386static void fb_flashcursor(void *private)
387{
388 struct fb_info *info = private;
389 struct fbcon_ops *ops = info->fbcon_par;
390 struct display *p;
391 struct vc_data *vc = NULL;
392 int c;
393 int mode;
394
5428b044
AD		 395 acquire_console_sem();
396 if (ops && ops->currcon != -1)
1da177e4
LT		 397 vc = vc_cons[ops->currcon].d;
398
399 if (!vc || !CON_IS_VISIBLE(vc) ||
400 fbcon_is_inactive(vc, info) ||
dbd4f128 401 registered_fb[con2fb_map[vc->vc_num]] != info ||
5428b044
AD		 402 vc_cons[ops->currcon].d->vc_deccm != 1) {
403 release_console_sem();
1da177e4 404 return;
5428b044
AD		 405 }
406
1da177e4
LT		 407 p = &fb_display[vc->vc_num];
408 c = scr_readw((u16 *) vc->vc_pos);
409 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
410 CM_ERASE : CM_DRAW;
b73deed3 411 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4
LT		 412 get_color(vc, info, c, 0));
413 release_console_sem();
414}
415
41359dca 416#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4
LT		 417static int cursor_blink_rate;
418static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
419{
420 struct fb_info *info = dev_id;
421
422 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
423 schedule_work(&info->queue);
424 vbl_cursor_cnt = cursor_blink_rate;
425 }
426 return IRQ_HANDLED;
427}
428#endif
429
430static void cursor_timer_handler(unsigned long dev_addr)
431{
432 struct fb_info *info = (struct fb_info *) dev_addr;
433 struct fbcon_ops *ops = info->fbcon_par;
434
435 schedule_work(&info->queue);
436 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
437}
438
88fb2c6e
AD		 439static void fbcon_add_cursor_timer(struct fb_info *info)
440{
441 struct fbcon_ops *ops = info->fbcon_par;
442
443 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
444 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
445 if (!info->queue.func)
446 INIT_WORK(&info->queue, fb_flashcursor, info);
447
448 init_timer(&ops->cursor_timer);
449 ops->cursor_timer.function = cursor_timer_handler;
450 ops->cursor_timer.expires = jiffies + HZ / 5;
451 ops->cursor_timer.data = (unsigned long ) info;
452 add_timer(&ops->cursor_timer);
453 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
454 }
455}
456
457static void fbcon_del_cursor_timer(struct fb_info *info)
458{
459 struct fbcon_ops *ops = info->fbcon_par;
460
461 if (info->queue.func == fb_flashcursor &&
462 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
463 del_timer_sync(&ops->cursor_timer);
464 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
465 }
466}
467
1da177e4
LT		 468#ifndef MODULE
469static int __init fb_console_setup(char *this_opt)
470{
471 char *options;
472 int i, j;
473
474 if (!this_opt || !*this_opt)
9b41046c 475 return 1;
1da177e4
LT		 476
477 while ((options = strsep(&this_opt, ",")) != NULL) {
478 if (!strncmp(options, "font:", 5))
479 strcpy(fontname, options + 5);
480
481 if (!strncmp(options, "scrollback:", 11)) {
482 options += 11;
483 if (*options) {
484 fbcon_softback_size = simple_strtoul(options, &options, 0);
485 if (*options == 'k' || *options == 'K') {
486 fbcon_softback_size *= 1024;
487 options++;
488 }
489 if (*options != ',')
9b41046c 490 return 1;
1da177e4
LT		 491 options++;
492 } else
9b41046c 493 return 1;
1da177e4
LT		 494 }
495
496 if (!strncmp(options, "map:", 4)) {
497 options += 4;
498 if (*options)
499 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
500 if (!options[j])
501 j = 0;
502 con2fb_map_boot[i] =
503 (options[j++]-'0') % FB_MAX;
504 }
9b41046c 505 return 1;
1da177e4
LT		 506 }
507
508 if (!strncmp(options, "vc:", 3)) {
509 options += 3;
510 if (*options)
511 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
512 if (first_fb_vc < 0)
513 first_fb_vc = 0;
514 if (*options++ == '-')
515 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
516 fbcon_is_default = 0;
517 }
e4fc2761
AD		 518
519 if (!strncmp(options, "rotate:", 7)) {
520 options += 7;
521 if (*options)
522 rotate = simple_strtoul(options, &options, 0);
523 if (rotate > 3)
524 rotate = 0;
525 }
1da177e4 526 }
9b41046c 527 return 1;
1da177e4
LT		 528}
529
530__setup("fbcon=", fb_console_setup);
531#endif
532
533static int search_fb_in_map(int idx)
534{
535 int i, retval = 0;
536
537 for (i = 0; i < MAX_NR_CONSOLES; i++) {
538 if (con2fb_map[i] == idx)
539 retval = 1;
540 }
541 return retval;
542}
543
544static int search_for_mapped_con(void)
545{
546 int i, retval = 0;
547
548 for (i = 0; i < MAX_NR_CONSOLES; i++) {
549 if (con2fb_map[i] != -1)
550 retval = 1;
551 }
552 return retval;
553}
554
555static int fbcon_takeover(int show_logo)
556{
557 int err, i;
558
559 if (!num_registered_fb)
560 return -ENODEV;
561
562 if (!show_logo)
563 logo_shown = FBCON_LOGO_DONTSHOW;
564
565 for (i = first_fb_vc; i <= last_fb_vc; i++)
566 con2fb_map[i] = info_idx;
567
568 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
569 fbcon_is_default);
570 if (err) {
571 for (i = first_fb_vc; i <= last_fb_vc; i++) {
572 con2fb_map[i] = -1;
573 }
574 info_idx = -1;
575 }
576
577 return err;
578}
579
580static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
581 int cols, int rows, int new_cols, int new_rows)
582{
583 /* Need to make room for the logo */
9c44e5f6 584 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 585 int cnt, erase = vc->vc_video_erase_char, step;
586 unsigned short *save = NULL, *r, *q;
587
588 /*
589 * remove underline attribute from erase character
590 * if black and white framebuffer.
591 */
b8c90945 592 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 593 erase &= ~0x400;
9c44e5f6 594 logo_height = fb_prepare_logo(info, ops->rotate);
1da177e4
LT		 595 logo_lines = (logo_height + vc->vc_font.height - 1) /
596 vc->vc_font.height;
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
605 if (save) {
606 int i = cols < new_cols ? cols : new_cols;
607 scr_memsetw(save, erase, logo_lines * new_cols * 2);
608 r = q - step;
609 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
610 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
611 r = q;
612 }
613 }
614 if (r == q) {
615 /* We can scroll screen down */
616 r = q - step - cols;
617 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
618 scr_memcpyw(r + step, r, vc->vc_size_row);
619 r -= cols;
620 }
621 if (!save) {
622 vc->vc_y += logo_lines;
623 vc->vc_pos += logo_lines * vc->vc_size_row;
624 }
625 }
626 scr_memsetw((unsigned short *) vc->vc_origin,
627 erase,
628 vc->vc_size_row * logo_lines);
629
630 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
631 fbcon_clear_margins(vc, 0);
632 update_screen(vc);
633 }
634
635 if (save) {
636 q = (unsigned short *) (vc->vc_origin +
637 vc->vc_size_row *
638 rows);
639 scr_memcpyw(q, save, logo_lines * new_cols * 2);
640 vc->vc_y += logo_lines;
641 vc->vc_pos += logo_lines * vc->vc_size_row;
642 kfree(save);
643 }
644
645 if (logo_lines > vc->vc_bottom) {
646 logo_shown = FBCON_LOGO_CANSHOW;
647 printk(KERN_INFO
648 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
649 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
650 logo_shown = FBCON_LOGO_DRAW;
651 vc->vc_top = logo_lines;
652 }
653}
654
655#ifdef CONFIG_FB_TILEBLITTING
b73deed3 656static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 657{
658 struct fbcon_ops *ops = info->fbcon_par;
659
b73deed3 660 ops->p = &fb_display[vc->vc_num];
ab767201 661
1da177e4 662 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 663 fbcon_set_tileops(vc, info);
e4fc2761 664 else {
b73deed3 665 fbcon_set_rotation(info);
1da177e4 666 fbcon_set_bitops(ops);
e4fc2761 667 }
1da177e4
LT		 668}
669#else
b73deed3 670static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 671{
672 struct fbcon_ops *ops = info->fbcon_par;
673
674 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 675 ops->p = &fb_display[vc->vc_num];
676 fbcon_set_rotation(info);
1da177e4
LT		 677 fbcon_set_bitops(ops);
678}
679#endif /* CONFIG_MISC_TILEBLITTING */
680
681
682static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
683 int unit, int oldidx)
684{
685 struct fbcon_ops *ops = NULL;
686 int err = 0;
687
688 if (!try_module_get(info->fbops->owner))
689 err = -ENODEV;
690
691 if (!err && info->fbops->fb_open &&
692 info->fbops->fb_open(info, 0))
693 err = -ENODEV;
694
695 if (!err) {
a39bc34e 696 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 697 if (!ops)
698 err = -ENOMEM;
699 }
700
701 if (!err) {
1da177e4 702 info->fbcon_par = ops;
b73deed3 703 set_blitting_type(vc, info);
1da177e4
LT		 704 }
705
706 if (err) {
707 con2fb_map[unit] = oldidx;
708 module_put(info->fbops->owner);
709 }
710
711 return err;
712}
713
714static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
715 struct fb_info *newinfo, int unit,
716 int oldidx, int found)
717{
718 struct fbcon_ops *ops = oldinfo->fbcon_par;
719 int err = 0;
720
721 if (oldinfo->fbops->fb_release &&
722 oldinfo->fbops->fb_release(oldinfo, 0)) {
723 con2fb_map[unit] = oldidx;
724 if (!found && newinfo->fbops->fb_release)
725 newinfo->fbops->fb_release(newinfo, 0);
726 if (!found)
727 module_put(newinfo->fbops->owner);
728 err = -ENODEV;
729 }
730
731 if (!err) {
88fb2c6e 732 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 733 kfree(ops->cursor_state.mask);
734 kfree(ops->cursor_data);
e4fc2761 735 kfree(ops->fontbuffer);
1da177e4
LT		 736 kfree(oldinfo->fbcon_par);
737 oldinfo->fbcon_par = NULL;
738 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 739 /*
740 If oldinfo and newinfo are driving the same hardware,
741 the fb_release() method of oldinfo may attempt to
742 restore the hardware state. This will leave the
743 newinfo in an undefined state. Thus, a call to
744 fb_set_par() may be needed for the newinfo.
745 */
746 if (newinfo->fbops->fb_set_par)
747 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 748 }
749
750 return err;
751}
752
1da177e4
LT		 753static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
754 int unit, int show_logo)
755{
756 struct fbcon_ops *ops = info->fbcon_par;
757
758 ops->currcon = fg_console;
759
760 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
761 info->fbops->fb_set_par(info);
762
763 ops->flags |= FBCON_FLAGS_INIT;
764 ops->graphics = 0;
765
766 if (vc)
767 fbcon_set_disp(info, &info->var, vc);
768 else
769 fbcon_preset_disp(info, &info->var, unit);
770
771 if (show_logo) {
772 struct vc_data *fg_vc = vc_cons[fg_console].d;
773 struct fb_info *fg_info =
774 registered_fb[con2fb_map[fg_console]];
775
776 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
777 fg_vc->vc_rows, fg_vc->vc_cols,
778 fg_vc->vc_rows);
779 }
780
781 update_screen(vc_cons[fg_console].d);
782}
783
784/**
785 * set_con2fb_map - map console to frame buffer device
786 * @unit: virtual console number to map
787 * @newidx: frame buffer index to map virtual console to
788 * @user: user request
789 *
790 * Maps a virtual console @unit to a frame buffer device
791 * @newidx.
792 */
793static int set_con2fb_map(int unit, int newidx, int user)
794{
795 struct vc_data *vc = vc_cons[unit].d;
796 int oldidx = con2fb_map[unit];
797 struct fb_info *info = registered_fb[newidx];
798 struct fb_info *oldinfo = NULL;
799 int found, err = 0;
800
801 if (oldidx == newidx)
802 return 0;
803
804 if (!info)
805 err = -EINVAL;
806
807 if (!err && !search_for_mapped_con()) {
808 info_idx = newidx;
809 return fbcon_takeover(0);
810 }
811
812 if (oldidx != -1)
813 oldinfo = registered_fb[oldidx];
814
815 found = search_fb_in_map(newidx);
816
817 acquire_console_sem();
818 con2fb_map[unit] = newidx;
819 if (!err && !found)
820 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
821
822
823 /*
824 * If old fb is not mapped to any of the consoles,
825 * fbcon should release it.
826 */
827 if (!err && oldinfo && !search_fb_in_map(oldidx))
828 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
829 found);
830
831 if (!err) {
832 int show_logo = (fg_console == 0 && !user &&
833 logo_shown != FBCON_LOGO_DONTSHOW);
834
835 if (!found)
88fb2c6e 836 fbcon_add_cursor_timer(info);
1da177e4
LT		 837 con2fb_map_boot[unit] = newidx;
838 con2fb_init_display(vc, info, unit, show_logo);
839 }
840
841 release_console_sem();
842 return err;
843}
844
845/*
846 * Low Level Operations
847 */
848/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
849static int var_to_display(struct display *disp,
850 struct fb_var_screeninfo *var,
851 struct fb_info *info)
852{
853 disp->xres_virtual = var->xres_virtual;
854 disp->yres_virtual = var->yres_virtual;
855 disp->bits_per_pixel = var->bits_per_pixel;
856 disp->grayscale = var->grayscale;
857 disp->nonstd = var->nonstd;
858 disp->accel_flags = var->accel_flags;
859 disp->height = var->height;
860 disp->width = var->width;
861 disp->red = var->red;
862 disp->green = var->green;
863 disp->blue = var->blue;
864 disp->transp = var->transp;
865 disp->rotate = var->rotate;
866 disp->mode = fb_match_mode(var, &info->modelist);
867 if (disp->mode == NULL)
868 /* This should not happen */
869 return -EINVAL;
870 return 0;
871}
872
873static void display_to_var(struct fb_var_screeninfo *var,
874 struct display *disp)
875{
876 fb_videomode_to_var(var, disp->mode);
877 var->xres_virtual = disp->xres_virtual;
878 var->yres_virtual = disp->yres_virtual;
879 var->bits_per_pixel = disp->bits_per_pixel;
880 var->grayscale = disp->grayscale;
881 var->nonstd = disp->nonstd;
882 var->accel_flags = disp->accel_flags;
883 var->height = disp->height;
884 var->width = disp->width;
885 var->red = disp->red;
886 var->green = disp->green;
887 var->blue = disp->blue;
888 var->transp = disp->transp;
889 var->rotate = disp->rotate;
890}
891
892static const char *fbcon_startup(void)
893{
894 const char *display_desc = "frame buffer device";
895 struct display *p = &fb_display[fg_console];
896 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 897 const struct font_desc *font = NULL;
1da177e4
LT		 898 struct module *owner;
899 struct fb_info *info = NULL;
900 struct fbcon_ops *ops;
901 int rows, cols;
902 int irqres;
903
904 irqres = 1;
905 /*
906 * If num_registered_fb is zero, this is a call for the dummy part.
907 * The frame buffer devices weren't initialized yet.
908 */
909 if (!num_registered_fb || info_idx == -1)
910 return display_desc;
911 /*
912 * Instead of blindly using registered_fb[0], we use info_idx, set by
913 * fb_console_init();
914 */
915 info = registered_fb[info_idx];
916 if (!info)
917 return NULL;
918
919 owner = info->fbops->owner;
920 if (!try_module_get(owner))
921 return NULL;
922 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
923 module_put(owner);
924 return NULL;
925 }
926
a39bc34e 927 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 928 if (!ops) {
929 module_put(owner);
930 return NULL;
931 }
932
1da177e4
LT		 933 ops->currcon = -1;
934 ops->graphics = 1;
e4fc2761 935 ops->cur_rotate = -1;
1da177e4 936 info->fbcon_par = ops;
e4fc2761 937 p->con_rotate = rotate;
b73deed3 938 set_blitting_type(vc, info);
1da177e4
LT		 939
940 if (info->fix.type != FB_TYPE_TEXT) {
941 if (fbcon_softback_size) {
942 if (!softback_buf) {
943 softback_buf =
944 (unsigned long)
945 kmalloc(fbcon_softback_size,
946 GFP_KERNEL);
947 if (!softback_buf) {
948 fbcon_softback_size = 0;
949 softback_top = 0;
950 }
951 }
952 } else {
953 if (softback_buf) {
954 kfree((void *) softback_buf);
955 softback_buf = 0;
956 softback_top = 0;
957 }
958 }
959 if (softback_buf)
960 softback_in = softback_top = softback_curr =
961 softback_buf;
962 softback_lines = 0;
963 }
964
965 /* Setup default font */
966 if (!p->fontdata) {
967 if (!fontname[0] || !(font = find_font(fontname)))
968 font = get_default_font(info->var.xres,
969 info->var.yres);
970 vc->vc_font.width = font->width;
971 vc->vc_font.height = font->height;
2f4516db 972 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 973 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
974 }
975
e4fc2761
AD		 976 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
977 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
978 cols /= vc->vc_font.width;
979 rows /= vc->vc_font.height;
1da177e4
LT		 980 vc_resize(vc, cols, rows);
981
982 DPRINTK("mode: %s\n", info->fix.id);
983 DPRINTK("visual: %d\n", info->fix.visual);
984 DPRINTK("res: %dx%d-%d\n", info->var.xres,
985 info->var.yres,
986 info->var.bits_per_pixel);
987
988#ifdef CONFIG_ATARI
989 if (MACH_IS_ATARI) {
990 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
991 irqres =
992 request_irq(IRQ_AUTO_4, fb_vbl_handler,
993 IRQ_TYPE_PRIO, "framebuffer vbl",
994 info);
995 }
996#endif /* CONFIG_ATARI */
997
998#ifdef CONFIG_MAC
999 /*
1000 * On a Macintoy, the VBL interrupt may or may not be active.
1001 * As interrupt based cursor is more reliable and race free, we
1002 * probe for VBL interrupts.
1003 */
1004 if (MACH_IS_MAC) {
1005 int ct = 0;
1006 /*
1007 * Probe for VBL: set temp. handler ...
1008 */
1009 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1010 "framebuffer vbl", info);
1011 vbl_detected = 0;
1012
1013 /*
1014 * ... and spin for 20 ms ...
1015 */
1016 while (!vbl_detected && ++ct < 1000)
1017 udelay(20);
1018
1019 if (ct == 1000)
1020 printk
1021 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1022
1023 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1024
1025 if (vbl_detected) {
1026 /*
1027 * interrupt based cursor ok
1028 */
1029 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1030 irqres =
1031 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1032 "framebuffer vbl", info);
1033 } else {
1034 /*
1035 * VBL not detected: fall through, use timer based cursor
1036 */
1037 irqres = 1;
1038 }
1039 }
1040#endif /* CONFIG_MAC */
1041
88fb2c6e 1042 fbcon_add_cursor_timer(info);
1da177e4
LT		 1043 return display_desc;
1044}
1045
1046static void fbcon_init(struct vc_data *vc, int init)
1047{
1048 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1049 struct fbcon_ops *ops;
1050 struct vc_data **default_mode = vc->vc_display_fg;
1051 struct vc_data *svc = *default_mode;
1052 struct display *t, *p = &fb_display[vc->vc_num];
1053 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 1054 int cap;
1da177e4
LT		 1055
1056 if (info_idx == -1 || info == NULL)
1057 return;
306958e8
AB		 1058
1059 cap = info->flags;
1060
1da177e4
LT		 1061 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1062 (info->fix.type == FB_TYPE_TEXT))
1063 logo = 0;
1064
1da177e4
LT		 1065 if (var_to_display(p, &info->var, info))
1066 return;
1067
1068 /* If we are not the first console on this
1069 fb, copy the font from that console */
1070 t = &fb_display[svc->vc_num];
1071 if (!vc->vc_font.data) {
2f4516db 1072 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1073 vc->vc_font.width = (*default_mode)->vc_font.width;
1074 vc->vc_font.height = (*default_mode)->vc_font.height;
1075 p->userfont = t->userfont;
1076 if (p->userfont)
1077 REFCOUNT(p->fontdata)++;
1078 }
1079 if (p->userfont)
1080 charcnt = FNTCHARCNT(p->fontdata);
b8c90945 1081 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1082 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1083 if (charcnt == 256) {
1084 vc->vc_hi_font_mask = 0;
1085 } else {
1086 vc->vc_hi_font_mask = 0x100;
1087 if (vc->vc_can_do_color)
1088 vc->vc_complement_mask <<= 1;
1089 }
1090
1091 if (!*svc->vc_uni_pagedir_loc)
1092 con_set_default_unimap(svc);
1093 if (!*vc->vc_uni_pagedir_loc)
1094 con_copy_unimap(vc, svc);
1095
e4fc2761
AD		 1096 ops = info->fbcon_par;
1097 p->con_rotate = rotate;
b73deed3 1098 set_blitting_type(vc, info);
e4fc2761 1099
1da177e4
LT		 1100 cols = vc->vc_cols;
1101 rows = vc->vc_rows;
e4fc2761
AD		 1102 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1103 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1104 new_cols /= vc->vc_font.width;
1105 new_rows /= vc->vc_font.height;
1da177e4
LT		 1106 vc_resize(vc, new_cols, new_rows);
1107
1da177e4
LT		 1108 /*
1109 * We must always set the mode. The mode of the previous console
1110 * driver could be in the same resolution but we are using different
1111 * hardware so we have to initialize the hardware.
1112 *
1113 * We need to do it in fbcon_init() to prevent screen corruption.
1114 */
d354d9af 1115 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4
LT		 1116 if (info->fbops->fb_set_par &&
1117 !(ops->flags & FBCON_FLAGS_INIT))
1118 info->fbops->fb_set_par(info);
1119 ops->flags |= FBCON_FLAGS_INIT;
1120 }
1121
1122 ops->graphics = 0;
1123
1124 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1125 !(cap & FBINFO_HWACCEL_DISABLED))
1126 p->scrollmode = SCROLL_MOVE;
1127 else /* default to something safe */
1128 p->scrollmode = SCROLL_REDRAW;
1129
1130 /*
1131 * ++guenther: console.c:vc_allocate() relies on initializing
1132 * vc_{cols,rows}, but we must not set those if we are only
1133 * resizing the console.
1134 */
1135 if (!init) {
1136 vc->vc_cols = new_cols;
1137 vc->vc_rows = new_rows;
1138 }
1139
1140 if (logo)
1141 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1142
4d9c5b6e
AD		 1143 if (vc == svc && softback_buf)
1144 fbcon_update_softback(vc);
e4fc2761 1145
b73deed3 1146 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1147 ops->rotate = FB_ROTATE_UR;
b73deed3 1148 set_blitting_type(vc, info);
e4fc2761
AD		 1149 }
1150
1a37d5f5 1151 ops->p = &fb_display[fg_console];
1da177e4
LT		 1152}
1153
1154static void fbcon_deinit(struct vc_data *vc)
1155{
1156 struct display *p = &fb_display[vc->vc_num];
1157
1158 if (info_idx != -1)
1159 return;
1160 fbcon_free_font(p);
1161}
1162
1163/* ====================================================================== */
1164
1165/* fbcon_XXX routines - interface used by the world
1166 *
1167 * This system is now divided into two levels because of complications
1168 * caused by hardware scrolling. Top level functions:
1169 *
1170 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1171 *
1172 * handles y values in range [0, scr_height-1] that correspond to real
1173 * screen positions. y_wrap shift means that first line of bitmap may be
1174 * anywhere on this display. These functions convert lineoffsets to
1175 * bitmap offsets and deal with the wrap-around case by splitting blits.
1176 *
1177 * fbcon_bmove_physical_8() -- These functions fast implementations
1178 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1179 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1180 *
1181 * WARNING:
1182 *
1183 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1184 * Implies should only really hardware scroll in rows. Only reason for
1185 * restriction is simplicity & efficiency at the moment.
1186 */
1187
1da177e4
LT		 1188static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1189 int width)
1190{
1191 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1192 struct fbcon_ops *ops = info->fbcon_par;
1193
1194 struct display *p = &fb_display[vc->vc_num];
1195 u_int y_break;
1196
1197 if (fbcon_is_inactive(vc, info))
1198 return;
1199
1200 if (!height || !width)
1201 return;
1202
1203 /* Split blits that cross physical y_wrap boundary */
1204
1205 y_break = p->vrows - p->yscroll;
1206 if (sy < y_break && sy + height - 1 >= y_break) {
1207 u_int b = y_break - sy;
1208 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1209 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1210 width);
1211 } else
1212 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1213}
1214
1215static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1216 int count, int ypos, int xpos)
1217{
1218 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1219 struct display *p = &fb_display[vc->vc_num];
1220 struct fbcon_ops *ops = info->fbcon_par;
1221
1222 if (!fbcon_is_inactive(vc, info))
1223 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1224 get_color(vc, info, scr_readw(s), 1),
1225 get_color(vc, info, scr_readw(s), 0));
1226}
1227
1228static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1229{
1230 unsigned short chr;
1231
1232 scr_writew(c, &chr);
1233 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1234}
1235
1236static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1237{
1238 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1239 struct fbcon_ops *ops = info->fbcon_par;
1240
1241 if (!fbcon_is_inactive(vc, info))
1242 ops->clear_margins(vc, info, bottom_only);
1243}
1244
1245static void fbcon_cursor(struct vc_data *vc, int mode)
1246{
1247 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1248 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1249 int y;
1250 int c = scr_readw((u16 *) vc->vc_pos);
1251
1252 if (fbcon_is_inactive(vc, info))
1253 return;
1254
1255 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1256 if (mode & CM_SOFTBACK) {
1257 mode &= ~CM_SOFTBACK;
1258 y = softback_lines;
1259 } else {
1260 if (softback_lines)
1261 fbcon_set_origin(vc);
1262 y = 0;
1263 }
1264
b73deed3 1265 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4
LT		 1266 get_color(vc, info, c, 0));
1267 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1268}
1269
1270static int scrollback_phys_max = 0;
1271static int scrollback_max = 0;
1272static int scrollback_current = 0;
1273
1da177e4
LT		 1274/*
1275 * If no vc is existent yet, just set struct display
1276 */
1277static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1278 int unit)
1279{
1280 struct display *p = &fb_display[unit];
1281 struct display *t = &fb_display[fg_console];
1282
1da177e4
LT		 1283 if (var_to_display(p, var, info))
1284 return;
1285
1286 p->fontdata = t->fontdata;
1287 p->userfont = t->userfont;
1288 if (p->userfont)
1289 REFCOUNT(p->fontdata)++;
1290}
1291
1292static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1293 struct vc_data *vc)
1294{
1295 struct display *p = &fb_display[vc->vc_num], *t;
1296 struct vc_data **default_mode = vc->vc_display_fg;
1297 struct vc_data *svc = *default_mode;
e4fc2761 1298 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1299 int rows, cols, charcnt = 256;
1300
1da177e4
LT		 1301 if (var_to_display(p, var, info))
1302 return;
1303 t = &fb_display[svc->vc_num];
1304 if (!vc->vc_font.data) {
2f4516db 1305 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1306 vc->vc_font.width = (*default_mode)->vc_font.width;
1307 vc->vc_font.height = (*default_mode)->vc_font.height;
1308 p->userfont = t->userfont;
1309 if (p->userfont)
1310 REFCOUNT(p->fontdata)++;
1311 }
1312 if (p->userfont)
1313 charcnt = FNTCHARCNT(p->fontdata);
1314
b8c90945
AD		 1315 var->activate = FB_ACTIVATE_NOW;
1316 info->var.activate = var->activate;
e4fc2761
AD		 1317 var->yoffset = info->var.yoffset;
1318 var->xoffset = info->var.xoffset;
b8c90945 1319 fb_set_var(info, var);
e4fc2761 1320 ops->var = info->var;
b8c90945 1321 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1322 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1323 if (charcnt == 256) {
1324 vc->vc_hi_font_mask = 0;
1325 } else {
1326 vc->vc_hi_font_mask = 0x100;
1327 if (vc->vc_can_do_color)
1328 vc->vc_complement_mask <<= 1;
1329 }
1330
1331 if (!*svc->vc_uni_pagedir_loc)
1332 con_set_default_unimap(svc);
1333 if (!*vc->vc_uni_pagedir_loc)
1334 con_copy_unimap(vc, svc);
1335
e4fc2761
AD		 1336 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1337 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1338 cols /= vc->vc_font.width;
1339 rows /= vc->vc_font.height;
1da177e4 1340 vc_resize(vc, cols, rows);
e4fc2761 1341
1da177e4
LT		 1342 if (CON_IS_VISIBLE(vc)) {
1343 update_screen(vc);
4d9c5b6e
AD		 1344 if (softback_buf)
1345 fbcon_update_softback(vc);
1da177e4
LT		 1346 }
1347}
1348
1349static __inline__ void ywrap_up(struct vc_data *vc, int count)
1350{
1351 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1352 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1353 struct display *p = &fb_display[vc->vc_num];
1354
1355 p->yscroll += count;
1356 if (p->yscroll >= p->vrows) /* Deal with wrap */
1357 p->yscroll -= p->vrows;
e4fc2761
AD		 1358 ops->var.xoffset = 0;
1359 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1360 ops->var.vmode |= FB_VMODE_YWRAP;
1361 ops->update_start(info);
1da177e4
LT		 1362 scrollback_max += count;
1363 if (scrollback_max > scrollback_phys_max)
1364 scrollback_max = scrollback_phys_max;
1365 scrollback_current = 0;
1366}
1367
1368static __inline__ void ywrap_down(struct vc_data *vc, int count)
1369{
1370 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1371 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1372 struct display *p = &fb_display[vc->vc_num];
1373
1374 p->yscroll -= count;
1375 if (p->yscroll < 0) /* Deal with wrap */
1376 p->yscroll += p->vrows;
e4fc2761
AD		 1377 ops->var.xoffset = 0;
1378 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1379 ops->var.vmode |= FB_VMODE_YWRAP;
1380 ops->update_start(info);
1da177e4
LT		 1381 scrollback_max -= count;
1382 if (scrollback_max < 0)
1383 scrollback_max = 0;
1384 scrollback_current = 0;
1385}
1386
1387static __inline__ void ypan_up(struct vc_data *vc, int count)
1388{
1389 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1390 struct display *p = &fb_display[vc->vc_num];
1391 struct fbcon_ops *ops = info->fbcon_par;
1392
1393 p->yscroll += count;
1394 if (p->yscroll > p->vrows - vc->vc_rows) {
1395 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1396 0, 0, 0, vc->vc_rows, vc->vc_cols);
1397 p->yscroll -= p->vrows - vc->vc_rows;
1398 }
e4fc2761
AD		 1399
1400 ops->var.xoffset = 0;
1401 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1402 ops->var.vmode &= ~FB_VMODE_YWRAP;
1403 ops->update_start(info);
1da177e4
LT		 1404 fbcon_clear_margins(vc, 1);
1405 scrollback_max += count;
1406 if (scrollback_max > scrollback_phys_max)
1407 scrollback_max = scrollback_phys_max;
1408 scrollback_current = 0;
1409}
1410
1411static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1412{
1413 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1414 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1415 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1416
1417 p->yscroll += count;
a39bc34e 1418
1da177e4
LT		 1419 if (p->yscroll > p->vrows - vc->vc_rows) {
1420 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1421 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1422 }
e4fc2761
AD		 1423
1424 ops->var.xoffset = 0;
1425 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1426 ops->var.vmode &= ~FB_VMODE_YWRAP;
1427 ops->update_start(info);
1da177e4
LT		 1428 fbcon_clear_margins(vc, 1);
1429 scrollback_max += count;
1430 if (scrollback_max > scrollback_phys_max)
1431 scrollback_max = scrollback_phys_max;
1432 scrollback_current = 0;
1433}
1434
1435static __inline__ void ypan_down(struct vc_data *vc, int count)
1436{
1437 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1438 struct display *p = &fb_display[vc->vc_num];
1439 struct fbcon_ops *ops = info->fbcon_par;
1440
1441 p->yscroll -= count;
1442 if (p->yscroll < 0) {
1443 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1444 0, vc->vc_rows, vc->vc_cols);
1445 p->yscroll += p->vrows - vc->vc_rows;
1446 }
e4fc2761
AD		 1447
1448 ops->var.xoffset = 0;
1449 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1450 ops->var.vmode &= ~FB_VMODE_YWRAP;
1451 ops->update_start(info);
1da177e4
LT		 1452 fbcon_clear_margins(vc, 1);
1453 scrollback_max -= count;
1454 if (scrollback_max < 0)
1455 scrollback_max = 0;
1456 scrollback_current = 0;
1457}
1458
1459static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1460{
1461 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1462 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1463 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1464
1465 p->yscroll -= count;
a39bc34e 1466
1da177e4
LT		 1467 if (p->yscroll < 0) {
1468 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1469 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1470 }
e4fc2761
AD		 1471
1472 ops->var.xoffset = 0;
1473 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1474 ops->var.vmode &= ~FB_VMODE_YWRAP;
1475 ops->update_start(info);
1da177e4
LT		 1476 fbcon_clear_margins(vc, 1);
1477 scrollback_max -= count;
1478 if (scrollback_max < 0)
1479 scrollback_max = 0;
1480 scrollback_current = 0;
1481}
1482
1483static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1484 long delta)
1485{
1486 int count = vc->vc_rows;
1487 unsigned short *d, *s;
1488 unsigned long n;
1489 int line = 0;
1490
1491 d = (u16 *) softback_curr;
1492 if (d == (u16 *) softback_in)
1493 d = (u16 *) vc->vc_origin;
1494 n = softback_curr + delta * vc->vc_size_row;
1495 softback_lines -= delta;
1496 if (delta < 0) {
1497 if (softback_curr < softback_top && n < softback_buf) {
1498 n += softback_end - softback_buf;
1499 if (n < softback_top) {
1500 softback_lines -=
1501 (softback_top - n) / vc->vc_size_row;
1502 n = softback_top;
1503 }
1504 } else if (softback_curr >= softback_top
1505 && n < softback_top) {
1506 softback_lines -=
1507 (softback_top - n) / vc->vc_size_row;
1508 n = softback_top;
1509 }
1510 } else {
1511 if (softback_curr > softback_in && n >= softback_end) {
1512 n += softback_buf - softback_end;
1513 if (n > softback_in) {
1514 n = softback_in;
1515 softback_lines = 0;
1516 }
1517 } else if (softback_curr <= softback_in && n > softback_in) {
1518 n = softback_in;
1519 softback_lines = 0;
1520 }
1521 }
1522 if (n == softback_curr)
1523 return;
1524 softback_curr = n;
1525 s = (u16 *) softback_curr;
1526 if (s == (u16 *) softback_in)
1527 s = (u16 *) vc->vc_origin;
1528 while (count--) {
1529 unsigned short *start;
1530 unsigned short *le;
1531 unsigned short c;
1532 int x = 0;
1533 unsigned short attr = 1;
1534
1535 start = s;
1536 le = advance_row(s, 1);
1537 do {
1538 c = scr_readw(s);
1539 if (attr != (c & 0xff00)) {
1540 attr = c & 0xff00;
1541 if (s > start) {
1542 fbcon_putcs(vc, start, s - start,
1543 line, x);
1544 x += s - start;
1545 start = s;
1546 }
1547 }
1548 if (c == scr_readw(d)) {
1549 if (s > start) {
1550 fbcon_putcs(vc, start, s - start,
1551 line, x);
1552 x += s - start + 1;
1553 start = s + 1;
1554 } else {
1555 x++;
1556 start++;
1557 }
1558 }
1559 s++;
1560 d++;
1561 } while (s < le);
1562 if (s > start)
1563 fbcon_putcs(vc, start, s - start, line, x);
1564 line++;
1565 if (d == (u16 *) softback_end)
1566 d = (u16 *) softback_buf;
1567 if (d == (u16 *) softback_in)
1568 d = (u16 *) vc->vc_origin;
1569 if (s == (u16 *) softback_end)
1570 s = (u16 *) softback_buf;
1571 if (s == (u16 *) softback_in)
1572 s = (u16 *) vc->vc_origin;
1573 }
1574}
1575
1576static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1577 int line, int count, int dy)
1578{
1579 unsigned short *s = (unsigned short *)
1580 (vc->vc_origin + vc->vc_size_row * line);
1581
1582 while (count--) {
1583 unsigned short *start = s;
1584 unsigned short *le = advance_row(s, 1);
1585 unsigned short c;
1586 int x = 0;
1587 unsigned short attr = 1;
1588
1589 do {
1590 c = scr_readw(s);
1591 if (attr != (c & 0xff00)) {
1592 attr = c & 0xff00;
1593 if (s > start) {
1594 fbcon_putcs(vc, start, s - start,
1595 dy, x);
1596 x += s - start;
1597 start = s;
1598 }
1599 }
1600 console_conditional_schedule();
1601 s++;
1602 } while (s < le);
1603 if (s > start)
1604 fbcon_putcs(vc, start, s - start, dy, x);
1605 console_conditional_schedule();
1606 dy++;
1607 }
1608}
1609
1610static void fbcon_redraw(struct vc_data *vc, struct display *p,
1611 int line, int count, int offset)
1612{
1613 unsigned short *d = (unsigned short *)
1614 (vc->vc_origin + vc->vc_size_row * line);
1615 unsigned short *s = d + offset;
1616
1617 while (count--) {
1618 unsigned short *start = s;
1619 unsigned short *le = advance_row(s, 1);
1620 unsigned short c;
1621 int x = 0;
1622 unsigned short attr = 1;
1623
1624 do {
1625 c = scr_readw(s);
1626 if (attr != (c & 0xff00)) {
1627 attr = c & 0xff00;
1628 if (s > start) {
1629 fbcon_putcs(vc, start, s - start,
1630 line, x);
1631 x += s - start;
1632 start = s;
1633 }
1634 }
1635 if (c == scr_readw(d)) {
1636 if (s > start) {
1637 fbcon_putcs(vc, start, s - start,
1638 line, x);
1639 x += s - start + 1;
1640 start = s + 1;
1641 } else {
1642 x++;
1643 start++;
1644 }
1645 }
1646 scr_writew(c, d);
1647 console_conditional_schedule();
1648 s++;
1649 d++;
1650 } while (s < le);
1651 if (s > start)
1652 fbcon_putcs(vc, start, s - start, line, x);
1653 console_conditional_schedule();
1654 if (offset > 0)
1655 line++;
1656 else {
1657 line--;
1658 /* NOTE: We subtract two lines from these pointers */
1659 s -= vc->vc_size_row;
1660 d -= vc->vc_size_row;
1661 }
1662 }
1663}
1664
1665static inline void fbcon_softback_note(struct vc_data *vc, int t,
1666 int count)
1667{
1668 unsigned short *p;
1669
1670 if (vc->vc_num != fg_console)
1671 return;
1672 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1673
1674 while (count) {
1675 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1676 count--;
1677 p = advance_row(p, 1);
1678 softback_in += vc->vc_size_row;
1679 if (softback_in == softback_end)
1680 softback_in = softback_buf;
1681 if (softback_in == softback_top) {
1682 softback_top += vc->vc_size_row;
1683 if (softback_top == softback_end)
1684 softback_top = softback_buf;
1685 }
1686 }
1687 softback_curr = softback_in;
1688}
1689
1690static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1691 int count)
1692{
1693 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1694 struct display *p = &fb_display[vc->vc_num];
1695 struct fbcon_ops *ops = info->fbcon_par;
1696 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1697
1698 if (fbcon_is_inactive(vc, info))
1699 return -EINVAL;
1700
1701 fbcon_cursor(vc, CM_ERASE);
1702
1703 /*
1704 * ++Geert: Only use ywrap/ypan if the console is in text mode
1705 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1706 * whole screen (prevents flicker).
1707 */
1708
1709 switch (dir) {
1710 case SM_UP:
1711 if (count > vc->vc_rows) /* Maximum realistic size */
1712 count = vc->vc_rows;
1713 if (softback_top)
1714 fbcon_softback_note(vc, t, count);
1715 if (logo_shown >= 0)
1716 goto redraw_up;
1717 switch (p->scrollmode) {
1718 case SCROLL_MOVE:
1719 ops->bmove(vc, info, t + count, 0, t, 0,
1720 b - t - count, vc->vc_cols);
1721 ops->clear(vc, info, b - count, 0, count,
1722 vc->vc_cols);
1723 break;
1724
1725 case SCROLL_WRAP_MOVE:
1726 if (b - t - count > 3 * vc->vc_rows >> 2) {
1727 if (t > 0)
1728 fbcon_bmove(vc, 0, 0, count, 0, t,
1729 vc->vc_cols);
1730 ywrap_up(vc, count);
1731 if (vc->vc_rows - b > 0)
1732 fbcon_bmove(vc, b - count, 0, b, 0,
1733 vc->vc_rows - b,
1734 vc->vc_cols);
1735 } else if (info->flags & FBINFO_READS_FAST)
1736 fbcon_bmove(vc, t + count, 0, t, 0,
1737 b - t - count, vc->vc_cols);
1738 else
1739 goto redraw_up;
1740 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1741 break;
1742
1743 case SCROLL_PAN_REDRAW:
1744 if ((p->yscroll + count <=
1745 2 * (p->vrows - vc->vc_rows))
1746 && ((!scroll_partial && (b - t == vc->vc_rows))
1747 || (scroll_partial
1748 && (b - t - count >
1749 3 * vc->vc_rows >> 2)))) {
1750 if (t > 0)
1751 fbcon_redraw_move(vc, p, 0, t, count);
1752 ypan_up_redraw(vc, t, count);
1753 if (vc->vc_rows - b > 0)
26e780e8 1754 fbcon_redraw_move(vc, p, b,
1da177e4
LT		 1755 vc->vc_rows - b, b);
1756 } else
1757 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1758 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1759 break;
1760
1761 case SCROLL_PAN_MOVE:
1762 if ((p->yscroll + count <=
1763 2 * (p->vrows - vc->vc_rows))
1764 && ((!scroll_partial && (b - t == vc->vc_rows))
1765 || (scroll_partial
1766 && (b - t - count >
1767 3 * vc->vc_rows >> 2)))) {
1768 if (t > 0)
1769 fbcon_bmove(vc, 0, 0, count, 0, t,
1770 vc->vc_cols);
1771 ypan_up(vc, count);
1772 if (vc->vc_rows - b > 0)
1773 fbcon_bmove(vc, b - count, 0, b, 0,
1774 vc->vc_rows - b,
1775 vc->vc_cols);
1776 } else if (info->flags & FBINFO_READS_FAST)
1777 fbcon_bmove(vc, t + count, 0, t, 0,
1778 b - t - count, vc->vc_cols);
1779 else
1780 goto redraw_up;
1781 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1782 break;
1783
1784 case SCROLL_REDRAW:
1785 redraw_up:
1786 fbcon_redraw(vc, p, t, b - t - count,
1787 count * vc->vc_cols);
1788 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1789 scr_memsetw((unsigned short *) (vc->vc_origin +
1790 vc->vc_size_row *
1791 (b - count)),
1792 vc->vc_video_erase_char,
1793 vc->vc_size_row * count);
1794 return 1;
1795 }
1796 break;
1797
1798 case SM_DOWN:
1799 if (count > vc->vc_rows) /* Maximum realistic size */
1800 count = vc->vc_rows;
e703ecc3
JB		 1801 if (logo_shown >= 0)
1802 goto redraw_down;
1da177e4
LT		 1803 switch (p->scrollmode) {
1804 case SCROLL_MOVE:
1805 ops->bmove(vc, info, t, 0, t + count, 0,
1806 b - t - count, vc->vc_cols);
1807 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1808 break;
1809
1810 case SCROLL_WRAP_MOVE:
1811 if (b - t - count > 3 * vc->vc_rows >> 2) {
1812 if (vc->vc_rows - b > 0)
1813 fbcon_bmove(vc, b, 0, b - count, 0,
1814 vc->vc_rows - b,
1815 vc->vc_cols);
1816 ywrap_down(vc, count);
1817 if (t > 0)
1818 fbcon_bmove(vc, count, 0, 0, 0, t,
1819 vc->vc_cols);
1820 } else if (info->flags & FBINFO_READS_FAST)
1821 fbcon_bmove(vc, t, 0, t + count, 0,
1822 b - t - count, vc->vc_cols);
1823 else
1824 goto redraw_down;
1825 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1826 break;
1827
1828 case SCROLL_PAN_MOVE:
1829 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1830 && ((!scroll_partial && (b - t == vc->vc_rows))
1831 || (scroll_partial
1832 && (b - t - count >
1833 3 * vc->vc_rows >> 2)))) {
1834 if (vc->vc_rows - b > 0)
1835 fbcon_bmove(vc, b, 0, b - count, 0,
1836 vc->vc_rows - b,
1837 vc->vc_cols);
1838 ypan_down(vc, count);
1839 if (t > 0)
1840 fbcon_bmove(vc, count, 0, 0, 0, t,
1841 vc->vc_cols);
1842 } else if (info->flags & FBINFO_READS_FAST)
1843 fbcon_bmove(vc, t, 0, t + count, 0,
1844 b - t - count, vc->vc_cols);
1845 else
1846 goto redraw_down;
1847 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1848 break;
1849
1850 case SCROLL_PAN_REDRAW:
1851 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1852 && ((!scroll_partial && (b - t == vc->vc_rows))
1853 || (scroll_partial
1854 && (b - t - count >
1855 3 * vc->vc_rows >> 2)))) {
1856 if (vc->vc_rows - b > 0)
1857 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1858 b - count);
1859 ypan_down_redraw(vc, t, count);
1860 if (t > 0)
1861 fbcon_redraw_move(vc, p, count, t, 0);
1862 } else
1863 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1864 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1865 break;
1866
1867 case SCROLL_REDRAW:
1868 redraw_down:
1869 fbcon_redraw(vc, p, b - 1, b - t - count,
1870 -count * vc->vc_cols);
1871 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1872 scr_memsetw((unsigned short *) (vc->vc_origin +
1873 vc->vc_size_row *
1874 t),
1875 vc->vc_video_erase_char,
1876 vc->vc_size_row * count);
1877 return 1;
1878 }
1879 }
1880 return 0;
1881}
1882
1883
1884static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1885 int height, int width)
1886{
1887 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1888 struct display *p = &fb_display[vc->vc_num];
1889
1890 if (fbcon_is_inactive(vc, info))
1891 return;
1892
1893 if (!width || !height)
1894 return;
1895
1896 /* Split blits that cross physical y_wrap case.
1897 * Pathological case involves 4 blits, better to use recursive
1898 * code rather than unrolled case
1899 *
1900 * Recursive invocations don't need to erase the cursor over and
1901 * over again, so we use fbcon_bmove_rec()
1902 */
1903 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1904 p->vrows - p->yscroll);
1905}
1906
1907static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1908 int dy, int dx, int height, int width, u_int y_break)
1909{
1910 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1911 struct fbcon_ops *ops = info->fbcon_par;
1912 u_int b;
1913
1914 if (sy < y_break && sy + height > y_break) {
1915 b = y_break - sy;
1916 if (dy < sy) { /* Avoid trashing self */
1917 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1918 y_break);
1919 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1920 height - b, width, y_break);
1921 } else {
1922 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1923 height - b, width, y_break);
1924 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1925 y_break);
1926 }
1927 return;
1928 }
1929
1930 if (dy < y_break && dy + height > y_break) {
1931 b = y_break - dy;
1932 if (dy < sy) { /* Avoid trashing self */
1933 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1934 y_break);
1935 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1936 height - b, width, y_break);
1937 } else {
1938 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1939 height - b, width, y_break);
1940 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1941 y_break);
1942 }
1943 return;
1944 }
1945 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1946 height, width);
1947}
1948
e4fc2761
AD		 1949static __inline__ void updatescrollmode(struct display *p,
1950 struct fb_info *info,
1da177e4
LT		 1951 struct vc_data *vc)
1952{
e4fc2761 1953 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1954 int fh = vc->vc_font.height;
1955 int cap = info->flags;
e4fc2761
AD		 1956 u16 t = 0;
1957 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1958 info->fix.xpanstep);
1959 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1960 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1961 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1962 info->var.xres_virtual);
1963 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1964 divides(ypan, vc->vc_font.height) && vyres > yres;
1965 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1966 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 1967 divides(vc->vc_font.height, vyres) &&
1968 divides(vc->vc_font.height, yres);
1da177e4 1969 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 1970 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1971 !(cap & FBINFO_HWACCEL_DISABLED);
1972 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1973 !(cap & FBINFO_HWACCEL_DISABLED);
1974
1975 p->vrows = vyres/fh;
1976 if (yres > (fh * (vc->vc_rows + 1)))
1977 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1978 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 1979 p->vrows--;
1980
1981 if (good_wrap || good_pan) {
1982 if (reading_fast || fast_copyarea)
e4fc2761
AD		 1983 p->scrollmode = good_wrap ?
1984 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 1985 else
1986 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1987 SCROLL_PAN_REDRAW;
1988 } else {
1989 if (reading_fast || (fast_copyarea && !fast_imageblit))
1990 p->scrollmode = SCROLL_MOVE;
1991 else
1992 p->scrollmode = SCROLL_REDRAW;
1993 }
1994}
1995
1996static int fbcon_resize(struct vc_data *vc, unsigned int width,
1997 unsigned int height)
1998{
1999 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2000 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2001 struct display *p = &fb_display[vc->vc_num];
2002 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 2003 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2004
2005 virt_w = FBCON_SWAP(ops->rotate, width, height);
2006 virt_h = FBCON_SWAP(ops->rotate, height, width);
2007 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2008 vc->vc_font.height);
2009 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2010 vc->vc_font.width);
2011 var.xres = virt_w * virt_fw;
2012 var.yres = virt_h * virt_fh;
1da177e4
LT		 2013 x_diff = info->var.xres - var.xres;
2014 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2015 if (x_diff < 0 || x_diff > virt_fw ||
2016 y_diff < 0 || y_diff > virt_fh) {
1da177e4
LT		 2017 struct fb_videomode *mode;
2018
2019 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2020 mode = fb_find_best_mode(&var, &info->modelist);
2021 if (mode == NULL)
2022 return -EINVAL;
3084a895 2023 display_to_var(&var, p);
1da177e4 2024 fb_videomode_to_var(&var, mode);
3084a895 2025
e4fc2761 2026 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2027 return -EINVAL;
1da177e4
LT		 2028
2029 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2030 if (CON_IS_VISIBLE(vc)) {
2031 var.activate = FB_ACTIVATE_NOW |
2032 FB_ACTIVATE_FORCE;
2033 fb_set_var(info, &var);
2034 }
2035 var_to_display(p, &info->var, info);
e4fc2761 2036 ops->var = info->var;
1da177e4
LT		 2037 }
2038 updatescrollmode(p, info, vc);
2039 return 0;
2040}
2041
2042static int fbcon_switch(struct vc_data *vc)
2043{
88fb2c6e 2044 struct fb_info *info, *old_info = NULL;
e4fc2761 2045 struct fbcon_ops *ops;
1da177e4
LT		 2046 struct display *p = &fb_display[vc->vc_num];
2047 struct fb_var_screeninfo var;
56f0d64d 2048 int i, prev_console, charcnt = 256;
1da177e4
LT		 2049
2050 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2051 ops = info->fbcon_par;
1da177e4
LT		 2052
2053 if (softback_top) {
1da177e4
LT		 2054 if (softback_lines)
2055 fbcon_set_origin(vc);
2056 softback_top = softback_curr = softback_in = softback_buf;
2057 softback_lines = 0;
4d9c5b6e 2058 fbcon_update_softback(vc);
1da177e4
LT		 2059 }
2060
2061 if (logo_shown >= 0) {
2062 struct vc_data *conp2 = vc_cons[logo_shown].d;
2063
2064 if (conp2->vc_top == logo_lines
2065 && conp2->vc_bottom == conp2->vc_rows)
2066 conp2->vc_top = 0;
2067 logo_shown = FBCON_LOGO_CANSHOW;
2068 }
2069
e4fc2761 2070 prev_console = ops->currcon;
88fb2c6e
AD		 2071 if (prev_console != -1)
2072 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2073 /*
2074 * FIXME: If we have multiple fbdev's loaded, we need to
2075 * update all info->currcon. Perhaps, we can place this
2076 * in a centralized structure, but this might break some
2077 * drivers.
2078 *
2079 * info->currcon = vc->vc_num;
2080 */
2081 for (i = 0; i < FB_MAX; i++) {
2082 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2083 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2084
e4fc2761 2085 o->currcon = vc->vc_num;
1da177e4
LT		 2086 }
2087 }
2088 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2089 display_to_var(&var, p);
2090 var.activate = FB_ACTIVATE_NOW;
2091
2092 /*
2093 * make sure we don't unnecessarily trip the memcmp()
2094 * in fb_set_var()
2095 */
2096 info->var.activate = var.activate;
e4fc2761
AD		 2097 var.yoffset = info->var.yoffset;
2098 var.xoffset = info->var.xoffset;
2099 var.vmode = info->var.vmode;
1da177e4 2100 fb_set_var(info, &var);
e4fc2761 2101 ops->var = info->var;
1da177e4 2102
39942fd8
KP		 2103 if (old_info != NULL && (old_info != info ||
2104 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
88fb2c6e
AD		 2105 if (info->fbops->fb_set_par)
2106 info->fbops->fb_set_par(info);
a39bc34e 2107
5428b044 2108 if (old_info != info)
a39bc34e 2109 fbcon_del_cursor_timer(old_info);
88fb2c6e 2110 }
1da177e4 2111
5428b044 2112 fbcon_add_cursor_timer(info);
b73deed3 2113 set_blitting_type(vc, info);
e4fc2761
AD		 2114 ops->cursor_reset = 1;
2115
b73deed3 2116 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2117 ops->rotate = FB_ROTATE_UR;
b73deed3 2118 set_blitting_type(vc, info);
e4fc2761 2119 }
1da177e4 2120
b8c90945 2121 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2122 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2123
2124 if (p->userfont)
2125 charcnt = FNTCHARCNT(vc->vc_font.data);
2126
2127 if (charcnt > 256)
2128 vc->vc_complement_mask <<= 1;
2129
1da177e4
LT		 2130 updatescrollmode(p, info, vc);
2131
2132 switch (p->scrollmode) {
2133 case SCROLL_WRAP_MOVE:
2134 scrollback_phys_max = p->vrows - vc->vc_rows;
2135 break;
2136 case SCROLL_PAN_MOVE:
2137 case SCROLL_PAN_REDRAW:
2138 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2139 if (scrollback_phys_max < 0)
2140 scrollback_phys_max = 0;
2141 break;
2142 default:
2143 scrollback_phys_max = 0;
2144 break;
2145 }
e4fc2761 2146
1da177e4
LT		 2147 scrollback_max = 0;
2148 scrollback_current = 0;
4e1567d3
AD		 2149
2150 if (!fbcon_is_inactive(vc, info)) {
2151 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2152 ops->update_start(info);
2153 }
2154
1da177e4
LT		 2155 fbcon_set_palette(vc, color_table);
2156 fbcon_clear_margins(vc, 0);
2157
2158 if (logo_shown == FBCON_LOGO_DRAW) {
2159
2160 logo_shown = fg_console;
2161 /* This is protected above by initmem_freed */
9c44e5f6 2162 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2163 update_region(vc,
2164 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2165 vc->vc_size_row * (vc->vc_bottom -
2166 vc->vc_top) / 2);
2167 return 0;
2168 }
2169 return 1;
2170}
2171
2172static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2173 int blank)
2174{
2175 if (blank) {
2176 unsigned short charmask = vc->vc_hi_font_mask ?
2177 0x1ff : 0xff;
2178 unsigned short oldc;
2179
2180 oldc = vc->vc_video_erase_char;
2181 vc->vc_video_erase_char &= charmask;
2182 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2183 vc->vc_video_erase_char = oldc;
2184 }
2185}
2186
2187static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2188{
2189 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2190 struct fbcon_ops *ops = info->fbcon_par;
2191
2192 if (mode_switch) {
2193 struct fb_var_screeninfo var = info->var;
2194
2195 ops->graphics = 1;
2196
2197 if (!blank) {
47434847
AD		 2198 if (info->fbops->fb_save_state)
2199 info->fbops->fb_save_state(info);
1da177e4
LT		 2200 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2201 fb_set_var(info, &var);
2202 ops->graphics = 0;
e4fc2761 2203 ops->var = info->var;
47434847
AD		 2204 } else if (info->fbops->fb_restore_state)
2205 info->fbops->fb_restore_state(info);
1da177e4
LT		 2206 }
2207
2208 if (!fbcon_is_inactive(vc, info)) {
2209 if (ops->blank_state != blank) {
2210 ops->blank_state = blank;
2211 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2212 ops->cursor_flash = (!blank);
2213
2214 if (fb_blank(info, blank))
2215 fbcon_generic_blank(vc, info, blank);
2216 }
2217
88fb2c6e
AD		 2218 if (!blank)
2219 update_screen(vc);
2220 }
2221
2222 if (!blank)
2223 fbcon_add_cursor_timer(info);
2224 else
2225 fbcon_del_cursor_timer(info);
1da177e4 2226
88fb2c6e 2227 return 0;
1da177e4
LT		 2228}
2229
2230static void fbcon_free_font(struct display *p)
2231{
2232 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2233 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2234 p->fontdata = NULL;
2235 p->userfont = 0;
2236}
2237
2238static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2239{
2240 u8 *fontdata = vc->vc_font.data;
2241 u8 *data = font->data;
2242 int i, j;
2243
2244 font->width = vc->vc_font.width;
2245 font->height = vc->vc_font.height;
2246 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2247 if (!font->data)
2248 return 0;
2249
2250 if (font->width <= 8) {
2251 j = vc->vc_font.height;
2252 for (i = 0; i < font->charcount; i++) {
2253 memcpy(data, fontdata, j);
2254 memset(data + j, 0, 32 - j);
2255 data += 32;
2256 fontdata += j;
2257 }
2258 } else if (font->width <= 16) {
2259 j = vc->vc_font.height * 2;
2260 for (i = 0; i < font->charcount; i++) {
2261 memcpy(data, fontdata, j);
2262 memset(data + j, 0, 64 - j);
2263 data += 64;
2264 fontdata += j;
2265 }
2266 } else if (font->width <= 24) {
2267 for (i = 0; i < font->charcount; i++) {
2268 for (j = 0; j < vc->vc_font.height; j++) {
2269 *data++ = fontdata[0];
2270 *data++ = fontdata[1];
2271 *data++ = fontdata[2];
2272 fontdata += sizeof(u32);
2273 }
2274 memset(data, 0, 3 * (32 - j));
2275 data += 3 * (32 - j);
2276 }
2277 } else {
2278 j = vc->vc_font.height * 4;
2279 for (i = 0; i < font->charcount; i++) {
2280 memcpy(data, fontdata, j);
2281 memset(data + j, 0, 128 - j);
2282 data += 128;
2283 fontdata += j;
2284 }
2285 }
2286 return 0;
2287}
2288
2289static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2290 const u8 * data, int userfont)
1da177e4
LT		 2291{
2292 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2293 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2294 struct display *p = &fb_display[vc->vc_num];
2295 int resize;
2296 int cnt;
2297 char *old_data = NULL;
2298
2299 if (CON_IS_VISIBLE(vc) && softback_lines)
2300 fbcon_set_origin(vc);
2301
2302 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2303 if (p->userfont)
2304 old_data = vc->vc_font.data;
2305 if (userfont)
2306 cnt = FNTCHARCNT(data);
2307 else
2308 cnt = 256;
2f4516db 2309 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2310 if ((p->userfont = userfont))
2311 REFCOUNT(data)++;
2312 vc->vc_font.width = w;
2313 vc->vc_font.height = h;
2314 if (vc->vc_hi_font_mask && cnt == 256) {
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 if (!vc->vc_hi_font_mask && cnt == 512) {
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 if (resize) {
e4fc2761
AD		 2373 int cols, rows;
2374
2375 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2376 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2377 cols /= w;
2378 rows /= h;
2379 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2380 if (CON_IS_VISIBLE(vc) && softback_buf)
2381 fbcon_update_softback(vc);
1da177e4
LT		 2382 } else if (CON_IS_VISIBLE(vc)
2383 && vc->vc_mode == KD_TEXT) {
2384 fbcon_clear_margins(vc, 0);
2385 update_screen(vc);
2386 }
2387
2388 if (old_data && (--REFCOUNT(old_data) == 0))
2389 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2390 return 0;
2391}
2392
2393static int fbcon_copy_font(struct vc_data *vc, int con)
2394{
2395 struct display *od = &fb_display[con];
2396 struct console_font *f = &vc->vc_font;
2397
2398 if (od->fontdata == f->data)
2399 return 0; /* already the same font... */
2400 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2401}
2402
2403/*
2404 * User asked to set font; we are guaranteed that
2405 * a) width and height are in range 1..32
2406 * b) charcount does not exceed 512
2407 * but lets not assume that, since someone might someday want to use larger
2408 * fonts. And charcount of 512 is small for unicode support.
2409 *
2410 * However, user space gives the font in 32 rows , regardless of
2411 * actual font height. So a new API is needed if support for larger fonts
2412 * is ever implemented.
2413 */
2414
2415static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2416{
2417 unsigned charcount = font->charcount;
2418 int w = font->width;
2419 int h = font->height;
2420 int size;
2421 int i, csum;
2422 u8 *new_data, *data = font->data;
2423 int pitch = (font->width+7) >> 3;
2424
2425 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2426 * If not this check should be changed to charcount < 256 */
2427 if (charcount != 256 && charcount != 512)
2428 return -EINVAL;
2429
2430 size = h * pitch * charcount;
2431
2432 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2433
2434 if (!new_data)
2435 return -ENOMEM;
2436
2437 new_data += FONT_EXTRA_WORDS * sizeof(int);
2438 FNTSIZE(new_data) = size;
2439 FNTCHARCNT(new_data) = charcount;
2440 REFCOUNT(new_data) = 0; /* usage counter */
2441 for (i=0; i< charcount; i++) {
2442 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2443 }
2444
2445 /* Since linux has a nice crc32 function use it for counting font
2446 * checksums. */
2447 csum = crc32(0, new_data, size);
2448
2449 FNTSUM(new_data) = csum;
2450 /* Check if the same font is on some other console already */
2451 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2452 struct vc_data *tmp = vc_cons[i].d;
2453
2454 if (fb_display[i].userfont &&
2455 fb_display[i].fontdata &&
2456 FNTSUM(fb_display[i].fontdata) == csum &&
2457 FNTSIZE(fb_display[i].fontdata) == size &&
2458 tmp->vc_font.width == w &&
2459 !memcmp(fb_display[i].fontdata, new_data, size)) {
2460 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2461 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2462 break;
2463 }
2464 }
2465 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2466}
2467
2468static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2469{
2470 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2471 const struct font_desc *f;
1da177e4
LT		 2472
2473 if (!name)
2474 f = get_default_font(info->var.xres, info->var.yres);
2475 else if (!(f = find_font(name)))
2476 return -ENOENT;
2477
2478 font->width = f->width;
2479 font->height = f->height;
2480 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2481}
2482
2483static u16 palette_red[16];
2484static u16 palette_green[16];
2485static u16 palette_blue[16];
2486
2487static struct fb_cmap palette_cmap = {
2488 0, 16, palette_red, palette_green, palette_blue, NULL
2489};
2490
2491static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2492{
2493 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2494 int i, j, k, depth;
2495 u8 val;
2496
2497 if (fbcon_is_inactive(vc, info))
2498 return -EINVAL;
2499
2500 if (!CON_IS_VISIBLE(vc))
2501 return 0;
2502
b8c90945 2503 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2504 if (depth > 3) {
2505 for (i = j = 0; i < 16; i++) {
2506 k = table[i];
2507 val = vc->vc_palette[j++];
2508 palette_red[k] = (val << 8) | val;
2509 val = vc->vc_palette[j++];
2510 palette_green[k] = (val << 8) | val;
2511 val = vc->vc_palette[j++];
2512 palette_blue[k] = (val << 8) | val;
2513 }
2514 palette_cmap.len = 16;
2515 palette_cmap.start = 0;
2516 /*
2517 * If framebuffer is capable of less than 16 colors,
2518 * use default palette of fbcon.
2519 */
2520 } else
2521 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2522
2523 return fb_set_cmap(&palette_cmap, info);
2524}
2525
2526static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2527{
2528 unsigned long p;
2529 int line;
2530
2531 if (vc->vc_num != fg_console || !softback_lines)
2532 return (u16 *) (vc->vc_origin + offset);
2533 line = offset / vc->vc_size_row;
2534 if (line >= softback_lines)
2535 return (u16 *) (vc->vc_origin + offset -
2536 softback_lines * vc->vc_size_row);
2537 p = softback_curr + offset;
2538 if (p >= softback_end)
2539 p += softback_buf - softback_end;
2540 return (u16 *) p;
2541}
2542
2543static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2544 int *px, int *py)
2545{
2546 unsigned long ret;
2547 int x, y;
2548
2549 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2550 unsigned long offset = (pos - vc->vc_origin) / 2;
2551
2552 x = offset % vc->vc_cols;
2553 y = offset / vc->vc_cols;
2554 if (vc->vc_num == fg_console)
2555 y += softback_lines;
2556 ret = pos + (vc->vc_cols - x) * 2;
2557 } else if (vc->vc_num == fg_console && softback_lines) {
2558 unsigned long offset = pos - softback_curr;
2559
2560 if (pos < softback_curr)
2561 offset += softback_end - softback_buf;
2562 offset /= 2;
2563 x = offset % vc->vc_cols;
2564 y = offset / vc->vc_cols;
2565 ret = pos + (vc->vc_cols - x) * 2;
2566 if (ret == softback_end)
2567 ret = softback_buf;
2568 if (ret == softback_in)
2569 ret = vc->vc_origin;
2570 } else {
2571 /* Should not happen */
2572 x = y = 0;
2573 ret = vc->vc_origin;
2574 }
2575 if (px)
2576 *px = x;
2577 if (py)
2578 *py = y;
2579 return ret;
2580}
2581
2582/* As we might be inside of softback, we may work with non-contiguous buffer,
2583 that's why we have to use a separate routine. */
2584static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2585{
2586 while (cnt--) {
2587 u16 a = scr_readw(p);
2588 if (!vc->vc_can_do_color)
2589 a ^= 0x0800;
2590 else if (vc->vc_hi_font_mask == 0x100)
2591 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2592 (((a) & 0x0e00) << 4);
2593 else
2594 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2595 (((a) & 0x0700) << 4);
2596 scr_writew(a, p++);
2597 if (p == (u16 *) softback_end)
2598 p = (u16 *) softback_buf;
2599 if (p == (u16 *) softback_in)
2600 p = (u16 *) vc->vc_origin;
2601 }
2602}
2603
2604static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2605{
2606 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2607 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2608 struct display *p = &fb_display[fg_console];
2609 int offset, limit, scrollback_old;
2610
2611 if (softback_top) {
2612 if (vc->vc_num != fg_console)
2613 return 0;
2614 if (vc->vc_mode != KD_TEXT || !lines)
2615 return 0;
2616 if (logo_shown >= 0) {
2617 struct vc_data *conp2 = vc_cons[logo_shown].d;
2618
2619 if (conp2->vc_top == logo_lines
2620 && conp2->vc_bottom == conp2->vc_rows)
2621 conp2->vc_top = 0;
2622 if (logo_shown == vc->vc_num) {
2623 unsigned long p, q;
2624 int i;
2625
2626 p = softback_in;
2627 q = vc->vc_origin +
2628 logo_lines * vc->vc_size_row;
2629 for (i = 0; i < logo_lines; i++) {
2630 if (p == softback_top)
2631 break;
2632 if (p == softback_buf)
2633 p = softback_end;
2634 p -= vc->vc_size_row;
2635 q -= vc->vc_size_row;
2636 scr_memcpyw((u16 *) q, (u16 *) p,
2637 vc->vc_size_row);
2638 }
308af929 2639 softback_in = softback_curr = p;
1da177e4
LT		 2640 update_region(vc, vc->vc_origin,
2641 logo_lines * vc->vc_cols);
2642 }
2643 logo_shown = FBCON_LOGO_CANSHOW;
2644 }
2645 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2646 fbcon_redraw_softback(vc, p, lines);
2647 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2648 return 0;
2649 }
2650
2651 if (!scrollback_phys_max)
2652 return -ENOSYS;
2653
2654 scrollback_old = scrollback_current;
2655 scrollback_current -= lines;
2656 if (scrollback_current < 0)
2657 scrollback_current = 0;
2658 else if (scrollback_current > scrollback_max)
2659 scrollback_current = scrollback_max;
2660 if (scrollback_current == scrollback_old)
2661 return 0;
2662
2663 if (fbcon_is_inactive(vc, info))
2664 return 0;
2665
2666 fbcon_cursor(vc, CM_ERASE);
2667
2668 offset = p->yscroll - scrollback_current;
2669 limit = p->vrows;
2670 switch (p->scrollmode) {
2671 case SCROLL_WRAP_MOVE:
2672 info->var.vmode |= FB_VMODE_YWRAP;
2673 break;
2674 case SCROLL_PAN_MOVE:
2675 case SCROLL_PAN_REDRAW:
2676 limit -= vc->vc_rows;
2677 info->var.vmode &= ~FB_VMODE_YWRAP;
2678 break;
2679 }
2680 if (offset < 0)
2681 offset += limit;
2682 else if (offset >= limit)
2683 offset -= limit;
e4fc2761
AD		 2684
2685 ops->var.xoffset = 0;
2686 ops->var.yoffset = offset * vc->vc_font.height;
2687 ops->update_start(info);
2688
1da177e4
LT		 2689 if (!scrollback_current)
2690 fbcon_cursor(vc, CM_DRAW);
2691 return 0;
2692}
2693
2694static int fbcon_set_origin(struct vc_data *vc)
2695{
2696 if (softback_lines)
2697 fbcon_scrolldelta(vc, softback_lines);
2698 return 0;
2699}
2700
2701static void fbcon_suspended(struct fb_info *info)
2702{
2703 struct vc_data *vc = NULL;
2704 struct fbcon_ops *ops = info->fbcon_par;
2705
2706 if (!ops || ops->currcon < 0)
2707 return;
2708 vc = vc_cons[ops->currcon].d;
2709
2710 /* Clear cursor, restore saved data */
2711 fbcon_cursor(vc, CM_ERASE);
2712}
2713
2714static void fbcon_resumed(struct fb_info *info)
2715{
2716 struct vc_data *vc;
2717 struct fbcon_ops *ops = info->fbcon_par;
2718
2719 if (!ops || ops->currcon < 0)
2720 return;
2721 vc = vc_cons[ops->currcon].d;
2722
2723 update_screen(vc);
2724}
2725
2726static void fbcon_modechanged(struct fb_info *info)
2727{
2728 struct fbcon_ops *ops = info->fbcon_par;
2729 struct vc_data *vc;
2730 struct display *p;
2731 int rows, cols;
2732
2733 if (!ops || ops->currcon < 0)
2734 return;
2735 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2736 if (vc->vc_mode != KD_TEXT ||
2737 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2738 return;
2739
2740 p = &fb_display[vc->vc_num];
b73deed3 2741 set_blitting_type(vc, info);
1da177e4
LT		 2742
2743 if (CON_IS_VISIBLE(vc)) {
2744 var_to_display(p, &info->var, info);
e4fc2761
AD		 2745 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2746 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2747 cols /= vc->vc_font.width;
2748 rows /= vc->vc_font.height;
1da177e4
LT		 2749 vc_resize(vc, cols, rows);
2750 updatescrollmode(p, info, vc);
2751 scrollback_max = 0;
2752 scrollback_current = 0;
4e1567d3
AD		 2753
2754 if (!fbcon_is_inactive(vc, info)) {
2755 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2756 ops->update_start(info);
2757 }
2758
1da177e4
LT		 2759 fbcon_set_palette(vc, color_table);
2760 update_screen(vc);
4d9c5b6e
AD		 2761 if (softback_buf)
2762 fbcon_update_softback(vc);
1da177e4
LT		 2763 }
2764}
2765
7726e9e1
AD		 2766static void fbcon_set_all_vcs(struct fb_info *info)
2767{
2768 struct fbcon_ops *ops = info->fbcon_par;
2769 struct vc_data *vc;
2770 struct display *p;
2771 int i, rows, cols;
2772
2773 if (!ops || ops->currcon < 0)
2774 return;
2775
2776 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2777 vc = vc_cons[i].d;
2778 if (!vc || vc->vc_mode != KD_TEXT ||
2779 registered_fb[con2fb_map[i]] != info)
2780 continue;
2781
2782 p = &fb_display[vc->vc_num];
b73deed3 2783 set_blitting_type(vc, info);
7726e9e1 2784 var_to_display(p, &info->var, info);
e4fc2761
AD		 2785 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2786 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2787 cols /= vc->vc_font.width;
2788 rows /= vc->vc_font.height;
7726e9e1
AD		 2789 vc_resize(vc, cols, rows);
2790
2791 if (CON_IS_VISIBLE(vc)) {
2792 updatescrollmode(p, info, vc);
2793 scrollback_max = 0;
2794 scrollback_current = 0;
4e1567d3
AD		 2795
2796 if (!fbcon_is_inactive(vc, info)) {
2797 ops->var.xoffset = ops->var.yoffset =
2798 p->yscroll = 0;
2799 ops->update_start(info);
2800 }
2801
7726e9e1
AD		 2802 fbcon_set_palette(vc, color_table);
2803 update_screen(vc);
4d9c5b6e
AD		 2804 if (softback_buf)
2805 fbcon_update_softback(vc);
7726e9e1
AD		 2806 }
2807 }
04a2fe57
AD		 2808
2809 ops->p = &fb_display[ops->currcon];
7726e9e1
AD		 2810}
2811
1da177e4
LT		 2812static int fbcon_mode_deleted(struct fb_info *info,
2813 struct fb_videomode *mode)
2814{
2815 struct fb_info *fb_info;
2816 struct display *p;
2817 int i, j, found = 0;
2818
2819 /* before deletion, ensure that mode is not in use */
2820 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2821 j = con2fb_map[i];
2822 if (j == -1)
2823 continue;
2824 fb_info = registered_fb[j];
2825 if (fb_info != info)
2826 continue;
2827 p = &fb_display[i];
2828 if (!p || !p->mode)
2829 continue;
2830 if (fb_mode_is_equal(p->mode, mode)) {
2831 found = 1;
2832 break;
2833 }
2834 }
2835 return found;
2836}
2837
2838static int fbcon_fb_registered(int idx)
2839{
2840 int ret = 0, i;
2841
2842 if (info_idx == -1) {
2843 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2844 if (con2fb_map_boot[i] == idx) {
2845 info_idx = idx;
2846 break;
2847 }
2848 }
2849 if (info_idx != -1)
2850 ret = fbcon_takeover(1);
2851 } else {
2852 for (i = 0; i < MAX_NR_CONSOLES; i++) {
5428b044
AD		 2853 if (con2fb_map_boot[i] == idx &&
2854 con2fb_map[i] == -1)
1da177e4
LT		 2855 set_con2fb_map(i, idx, 0);
2856 }
2857 }
2858
2859 return ret;
2860}
2861
2862static void fbcon_fb_blanked(struct fb_info *info, int blank)
2863{
2864 struct fbcon_ops *ops = info->fbcon_par;
2865 struct vc_data *vc;
2866
2867 if (!ops || ops->currcon < 0)
2868 return;
2869
2870 vc = vc_cons[ops->currcon].d;
2871 if (vc->vc_mode != KD_TEXT ||
2872 registered_fb[con2fb_map[ops->currcon]] != info)
2873 return;
2874
2875 if (CON_IS_VISIBLE(vc)) {
2876 if (blank)
2877 do_blank_screen(0);
2878 else
2879 do_unblank_screen(0);
2880 }
2881 ops->blank_state = blank;
2882}
2883
2884static void fbcon_new_modelist(struct fb_info *info)
2885{
2886 int i;
2887 struct vc_data *vc;
2888 struct fb_var_screeninfo var;
2889 struct fb_videomode *mode;
2890
2891 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2892 if (registered_fb[con2fb_map[i]] != info)
2893 continue;
2894 if (!fb_display[i].mode)
2895 continue;
2896 vc = vc_cons[i].d;
2897 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 2898 mode = fb_find_nearest_mode(fb_display[i].mode,
2899 &info->modelist);
1da177e4
LT		 2900 fb_videomode_to_var(&var, mode);
2901
2902 if (vc)
2903 fbcon_set_disp(info, &var, vc);
2904 else
2905 fbcon_preset_disp(info, &var, i);
2906
2907 }
2908}
2909
2910static int fbcon_event_notify(struct notifier_block *self,
2911 unsigned long action, void *data)
2912{
2913 struct fb_event *event = data;
2914 struct fb_info *info = event->info;
2915 struct fb_videomode *mode;
2916 struct fb_con2fbmap *con2fb;
2917 int ret = 0;
2918
2919 switch(action) {
2920 case FB_EVENT_SUSPEND:
2921 fbcon_suspended(info);
2922 break;
2923 case FB_EVENT_RESUME:
2924 fbcon_resumed(info);
2925 break;
2926 case FB_EVENT_MODE_CHANGE:
2927 fbcon_modechanged(info);
2928 break;
7726e9e1
AD		 2929 case FB_EVENT_MODE_CHANGE_ALL:
2930 fbcon_set_all_vcs(info);
2931 break;
1da177e4
LT		 2932 case FB_EVENT_MODE_DELETE:
2933 mode = event->data;
2934 ret = fbcon_mode_deleted(info, mode);
2935 break;
2936 case FB_EVENT_FB_REGISTERED:
2937 ret = fbcon_fb_registered(info->node);
2938 break;
2939 case FB_EVENT_SET_CONSOLE_MAP:
2940 con2fb = event->data;
2941 ret = set_con2fb_map(con2fb->console - 1,
2942 con2fb->framebuffer, 1);
2943 break;
2944 case FB_EVENT_GET_CONSOLE_MAP:
2945 con2fb = event->data;
2946 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2947 break;
2948 case FB_EVENT_BLANK:
2949 fbcon_fb_blanked(info, *(int *)event->data);
2950 break;
2951 case FB_EVENT_NEW_MODELIST:
2952 fbcon_new_modelist(info);
2953 break;
2954 }
2955
2956 return ret;
2957}
2958
2959/*
2960 * The console `switch' structure for the frame buffer based console
2961 */
2962
2963static const struct consw fb_con = {
2964 .owner = THIS_MODULE,
2965 .con_startup = fbcon_startup,
2966 .con_init = fbcon_init,
2967 .con_deinit = fbcon_deinit,
2968 .con_clear = fbcon_clear,
2969 .con_putc = fbcon_putc,
2970 .con_putcs = fbcon_putcs,
2971 .con_cursor = fbcon_cursor,
2972 .con_scroll = fbcon_scroll,
2973 .con_bmove = fbcon_bmove,
2974 .con_switch = fbcon_switch,
2975 .con_blank = fbcon_blank,
2976 .con_font_set = fbcon_set_font,
2977 .con_font_get = fbcon_get_font,
2978 .con_font_default = fbcon_set_def_font,
2979 .con_font_copy = fbcon_copy_font,
2980 .con_set_palette = fbcon_set_palette,
2981 .con_scrolldelta = fbcon_scrolldelta,
2982 .con_set_origin = fbcon_set_origin,
2983 .con_invert_region = fbcon_invert_region,
2984 .con_screen_pos = fbcon_screen_pos,
2985 .con_getxy = fbcon_getxy,
2986 .con_resize = fbcon_resize,
2987};
2988
2989static struct notifier_block fbcon_event_notifier = {
2990 .notifier_call = fbcon_event_notify,
2991};
2992
9a179176
AD		 2993static ssize_t store_rotate(struct class_device *class_device,
2994 const char *buf, size_t count)
2995{
2996 struct fb_info *info;
2997 int rotate, idx;
2998 char **last = NULL;
2999
3000 acquire_console_sem();
3001 idx = con2fb_map[fg_console];
3002
3003 if (idx == -1 || registered_fb[idx] == NULL)
3004 goto err;
3005
3006 info = registered_fb[idx];
3007 rotate = simple_strtoul(buf, last, 0);
3008 fbcon_rotate(info, rotate);
3009err:
3010 release_console_sem();
3011 return count;
3012}
3013
3014static ssize_t store_rotate_all(struct class_device *class_device,
3015 const char *buf, size_t count)
3016{
3017 struct fb_info *info;
3018 int rotate, idx;
3019 char **last = NULL;
3020
3021 acquire_console_sem();
3022 idx = con2fb_map[fg_console];
3023
3024 if (idx == -1 || registered_fb[idx] == NULL)
3025 goto err;
3026
3027 info = registered_fb[idx];
3028 rotate = simple_strtoul(buf, last, 0);
3029 fbcon_rotate_all(info, rotate);
3030err:
3031 release_console_sem();
3032 return count;
3033}
3034
3035static ssize_t show_rotate(struct class_device *class_device, char *buf)
3036{
3037 struct fb_info *info;
3038 int rotate = 0, idx;
3039
3040 acquire_console_sem();
3041 idx = con2fb_map[fg_console];
3042
3043 if (idx == -1 || registered_fb[idx] == NULL)
3044 goto err;
3045
3046 info = registered_fb[idx];
3047 rotate = fbcon_get_rotate(info);
3048err:
3049 release_console_sem();
3050 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3051}
3052
5428b044
AD		 3053static ssize_t store_attach(struct class_device *class_device,
3054 const char *buf, size_t count)
3055{
3056 if (info_idx == -1)
3057 fbcon_start();
3058
3059 return count;
3060}
3061
3062static ssize_t store_detach(struct class_device *class_device,
3063 const char *buf, size_t count)
3064{
3065 if (info_idx != -1) {
3066 fbcon_exit();
3067 give_up_console(&fb_con);
3068 }
3069
3070 info_idx = -1;
3071 return count;
3072}
3073
9a179176
AD		 3074static struct class_device_attribute class_device_attrs[] = {
3075 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3076 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
5428b044
AD		 3077 __ATTR(attach, S_IWUSR, NULL, store_attach),
3078 __ATTR(detach, S_IWUSR, NULL, store_detach),
9a179176
AD		 3079};
3080
3081static int fbcon_init_class_device(void)
3082{
3083 int i;
3084
3085 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3086 class_device_create_file(fbcon_class_device,
3087 &class_device_attrs[i]);
3088 return 0;
3089}
3090
5428b044 3091static void fbcon_start(void)
1da177e4 3092{
5428b044
AD		 3093 if (num_registered_fb) {
3094 int i;
9a179176 3095
5428b044 3096 acquire_console_sem();
1da177e4 3097
1da177e4
LT		 3098 for (i = 0; i < FB_MAX; i++) {
3099 if (registered_fb[i] != NULL) {
3100 info_idx = i;
3101 break;
3102 }
3103 }
5428b044
AD		 3104
3105 release_console_sem();
1da177e4
LT		 3106 fbcon_takeover(0);
3107 }
9a179176
AD		 3108}
3109
5428b044 3110static void fbcon_exit(void)
9a179176 3111{
e55186fe
AD		 3112 struct fb_info *info;
3113 int i, j, mapped;
3114
5428b044 3115 acquire_console_sem();
e55186fe
AD		 3116#ifdef CONFIG_ATARI
3117 free_irq(IRQ_AUTO_4, fbcon_vbl_handler);
3118#endif
3119#ifdef CONFIG_MAC
3120 if (MACH_IS_MAC && vbl_detected)
3121 free_irq(IRQ_MAC_VBL, fbcon_vbl_handler);
3122#endif
3123
3124 kfree((void *)softback_buf);
5428b044 3125 softback_buf = 0UL;
e55186fe
AD		 3126
3127 for (i = 0; i < FB_MAX; i++) {
3128 mapped = 0;
3129 info = registered_fb[i];
3130
3131 if (info == NULL)
3132 continue;
3133
3134 for (j = 0; j < MAX_NR_CONSOLES; j++) {
3135 if (con2fb_map[j] == i) {
3136 con2fb_map[j] = -1;
3137 mapped = 1;
3138 }
3139 }
3140
3141 if (mapped) {
3142 if (info->fbops->fb_release)
3143 info->fbops->fb_release(info, 0);
3144 module_put(info->fbops->owner);
5428b044
AD		 3145
3146 if (info->fbcon_par) {
3147 fbcon_del_cursor_timer(info);
3148 kfree(info->fbcon_par);
3149 info->fbcon_par = NULL;
3150 }
3151
3152 if (info->queue.func == fb_flashcursor)
3153 info->queue.func = NULL;
3154
e55186fe
AD		 3155 }
3156 }
3157
5428b044
AD		 3158 release_console_sem();
3159}
3160
3161static int __init fb_console_init(void)
3162{
3163 int i;
3164
3165 acquire_console_sem();
3166 fb_register_client(&fbcon_event_notifier);
3167 fbcon_class_device =
3168 class_device_create(fb_class, NULL,
3169 MKDEV(FB_MAJOR, FB_MAX), NULL,
3170 "fbcon");
3171
3172 if (IS_ERR(fbcon_class_device)) {
3173 printk(KERN_WARNING "Unable to create class_device "
3174 "for fbcon; errno = %ld\n",
3175 PTR_ERR(fbcon_class_device));
3176 fbcon_class_device = NULL;
3177 } else
3178 fbcon_init_class_device();
3179
3180 for (i = 0; i < MAX_NR_CONSOLES; i++)
3181 con2fb_map[i] = -1;
3182
3183 release_console_sem();
3184 fbcon_start();
3185 return 0;
3186}
3187
3188module_init(fb_console_init);
3189
3190#ifdef MODULE
3191
3192static void fbcon_deinit_class_device(void)
3193{
3194 int i;
3195
3196 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3197 class_device_remove_file(fbcon_class_device,
3198 &class_device_attrs[i]);
9a179176
AD		 3199}
3200
1da177e4
LT		 3201static void __exit fb_console_exit(void)
3202{
3203 acquire_console_sem();
3204 fb_unregister_client(&fbcon_event_notifier);
5428b044
AD		 3205 fbcon_deinit_class_device();
3206 class_device_destroy(fb_class, MKDEV(FB_MAJOR, FB_MAX));
1da177e4 3207 release_console_sem();
1da177e4
LT		 3208}
3209
3210module_exit(fb_console_exit);
3211
3212#endif
3213
3214MODULE_LICENSE("GPL");
ubuntu-zesty-kernel mirror