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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);
1da177e4
LT		 197
198#ifdef CONFIG_MAC
199/*
200 * On the Macintoy, there may or may not be a working VBL int. We need to probe
201 */
202static int vbl_detected;
203
204static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
205{
206 vbl_detected++;
207 return IRQ_HANDLED;
208}
209#endif
210
dbcbfe1e 211#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 212static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 213{
214 struct fbcon_ops *ops = info->fbcon_par;
215
216 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 217 ops->p->con_rotate < 4)
218 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 219 else
220 ops->rotate = 0;
221}
a812c94b
AD		 222
223static void fbcon_rotate(struct fb_info *info, u32 rotate)
224{
225 struct fbcon_ops *ops= info->fbcon_par;
226 struct fb_info *fb_info;
227
228 if (!ops || ops->currcon == -1)
229 return;
230
231 fb_info = registered_fb[con2fb_map[ops->currcon]];
232
233 if (info == fb_info) {
234 struct display *p = &fb_display[ops->currcon];
235
236 if (rotate < 4)
237 p->con_rotate = rotate;
238 else
239 p->con_rotate = 0;
240
241 fbcon_modechanged(info);
242 }
243}
244
245static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
246{
247 struct fbcon_ops *ops = info->fbcon_par;
248 struct vc_data *vc;
249 struct display *p;
250 int i;
251
252 if (!ops || ops->currcon < 0 || rotate > 3)
253 return;
254
255 for (i = 0; i < MAX_NR_CONSOLES; i++) {
256 vc = vc_cons[i].d;
257 if (!vc || vc->vc_mode != KD_TEXT ||
258 registered_fb[con2fb_map[i]] != info)
259 continue;
260
261 p = &fb_display[vc->vc_num];
262 p->con_rotate = rotate;
263 }
264
265 fbcon_set_all_vcs(info);
266}
dbcbfe1e 267#else
b73deed3 268static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 269{
270 struct fbcon_ops *ops = info->fbcon_par;
271
272 ops->rotate = FB_ROTATE_UR;
273}
a812c94b
AD		 274
275static void fbcon_rotate(struct fb_info *info, u32 rotate)
276{
277 return;
278}
279
280static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
281{
282 return;
283}
dbcbfe1e 284#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 285
a812c94b
AD		 286static int fbcon_get_rotate(struct fb_info *info)
287{
288 struct fbcon_ops *ops = info->fbcon_par;
289
290 return (ops) ? ops->rotate : 0;
291}
292
1da177e4
LT		 293static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
294{
295 struct fbcon_ops *ops = info->fbcon_par;
296
297 return (info->state != FBINFO_STATE_RUNNING ||
298 vc->vc_mode != KD_TEXT || ops->graphics);
299}
300
301static inline int get_color(struct vc_data *vc, struct fb_info *info,
302 u16 c, int is_fg)
303{
b8c90945 304 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 305 int color = 0;
306
307 if (console_blanked) {
308 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
309
310 c = vc->vc_video_erase_char & charmask;
311 }
312
313 if (depth != 1)
314 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
315 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
316
317 switch (depth) {
318 case 1:
319 {
b8c90945
AD		 320 int col = ~(0xfff << (max(info->var.green.length,
321 max(info->var.red.length,
322 info->var.blue.length)))) & 0xff;
323
1da177e4 324 /* 0 or 1 */
b8c90945
AD		 325 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
326 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 327
328 if (console_blanked)
329 fg = bg;
330
331 color = (is_fg) ? fg : bg;
332 break;
333 }
334 case 2:
335 /*
336 * Scale down 16-colors to 4 colors. Default 4-color palette
2cc38ed1
AD		 337 * is grayscale. However, simply dividing the values by 4
338 * will not work, as colors 1, 2 and 3 will be scaled-down
339 * to zero rendering them invisible. So empirically convert
340 * colors to a sane 4-level grayscale.
1da177e4 341 */
2cc38ed1
AD		 342 switch (color) {
343 case 0:
344 color = 0; /* black */
345 break;
346 case 1 ... 6:
347 color = 2; /* white */
348 break;
349 case 7 ... 8:
350 color = 1; /* gray */
351 break;
352 default:
353 color = 3; /* intense white */
354 break;
355 }
356 break;
1da177e4
LT		 357 case 3:
358 /*
359 * Last 8 entries of default 16-color palette is a more intense
360 * version of the first 8 (i.e., same chrominance, different
361 * luminance).
362 */
363 color &= 7;
364 break;
365 }
366
367
368 return color;
369}
370
4d9c5b6e
AD		 371static void fbcon_update_softback(struct vc_data *vc)
372{
373 int l = fbcon_softback_size / vc->vc_size_row;
374
375 if (l > 5)
376 softback_end = softback_buf + l * vc->vc_size_row;
377 else
378 /* Smaller scrollback makes no sense, and 0 would screw
379 the operation totally */
380 softback_top = 0;
381}
382
1da177e4
LT		 383static void fb_flashcursor(void *private)
384{
385 struct fb_info *info = private;
386 struct fbcon_ops *ops = info->fbcon_par;
387 struct display *p;
388 struct vc_data *vc = NULL;
389 int c;
390 int mode;
391
392 if (ops->currcon != -1)
393 vc = vc_cons[ops->currcon].d;
394
395 if (!vc || !CON_IS_VISIBLE(vc) ||
396 fbcon_is_inactive(vc, info) ||
dbd4f128
MJ		 397 registered_fb[con2fb_map[vc->vc_num]] != info ||
398 vc_cons[ops->currcon].d->vc_deccm != 1)
1da177e4
LT		 399 return;
400 acquire_console_sem();
401 p = &fb_display[vc->vc_num];
402 c = scr_readw((u16 *) vc->vc_pos);
403 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
404 CM_ERASE : CM_DRAW;
b73deed3 405 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4
LT		 406 get_color(vc, info, c, 0));
407 release_console_sem();
408}
409
41359dca 410#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4
LT		 411static int cursor_blink_rate;
412static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
413{
414 struct fb_info *info = dev_id;
415
416 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
417 schedule_work(&info->queue);
418 vbl_cursor_cnt = cursor_blink_rate;
419 }
420 return IRQ_HANDLED;
421}
422#endif
423
424static void cursor_timer_handler(unsigned long dev_addr)
425{
426 struct fb_info *info = (struct fb_info *) dev_addr;
427 struct fbcon_ops *ops = info->fbcon_par;
428
429 schedule_work(&info->queue);
430 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
431}
432
88fb2c6e
AD		 433static void fbcon_add_cursor_timer(struct fb_info *info)
434{
435 struct fbcon_ops *ops = info->fbcon_par;
436
437 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
438 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
439 if (!info->queue.func)
440 INIT_WORK(&info->queue, fb_flashcursor, info);
441
442 init_timer(&ops->cursor_timer);
443 ops->cursor_timer.function = cursor_timer_handler;
444 ops->cursor_timer.expires = jiffies + HZ / 5;
445 ops->cursor_timer.data = (unsigned long ) info;
446 add_timer(&ops->cursor_timer);
447 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
448 }
449}
450
451static void fbcon_del_cursor_timer(struct fb_info *info)
452{
453 struct fbcon_ops *ops = info->fbcon_par;
454
455 if (info->queue.func == fb_flashcursor &&
456 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
457 del_timer_sync(&ops->cursor_timer);
458 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
459 }
460}
461
1da177e4
LT		 462#ifndef MODULE
463static int __init fb_console_setup(char *this_opt)
464{
465 char *options;
466 int i, j;
467
468 if (!this_opt || !*this_opt)
9b41046c 469 return 1;
1da177e4
LT		 470
471 while ((options = strsep(&this_opt, ",")) != NULL) {
472 if (!strncmp(options, "font:", 5))
473 strcpy(fontname, options + 5);
474
475 if (!strncmp(options, "scrollback:", 11)) {
476 options += 11;
477 if (*options) {
478 fbcon_softback_size = simple_strtoul(options, &options, 0);
479 if (*options == 'k' || *options == 'K') {
480 fbcon_softback_size *= 1024;
481 options++;
482 }
483 if (*options != ',')
9b41046c 484 return 1;
1da177e4
LT		 485 options++;
486 } else
9b41046c 487 return 1;
1da177e4
LT		 488 }
489
490 if (!strncmp(options, "map:", 4)) {
491 options += 4;
492 if (*options)
493 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
494 if (!options[j])
495 j = 0;
496 con2fb_map_boot[i] =
497 (options[j++]-'0') % FB_MAX;
498 }
9b41046c 499 return 1;
1da177e4
LT		 500 }
501
502 if (!strncmp(options, "vc:", 3)) {
503 options += 3;
504 if (*options)
505 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
506 if (first_fb_vc < 0)
507 first_fb_vc = 0;
508 if (*options++ == '-')
509 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
510 fbcon_is_default = 0;
511 }
e4fc2761
AD		 512
513 if (!strncmp(options, "rotate:", 7)) {
514 options += 7;
515 if (*options)
516 rotate = simple_strtoul(options, &options, 0);
517 if (rotate > 3)
518 rotate = 0;
519 }
1da177e4 520 }
9b41046c 521 return 1;
1da177e4
LT		 522}
523
524__setup("fbcon=", fb_console_setup);
525#endif
526
527static int search_fb_in_map(int idx)
528{
529 int i, retval = 0;
530
531 for (i = 0; i < MAX_NR_CONSOLES; i++) {
532 if (con2fb_map[i] == idx)
533 retval = 1;
534 }
535 return retval;
536}
537
538static int search_for_mapped_con(void)
539{
540 int i, retval = 0;
541
542 for (i = 0; i < MAX_NR_CONSOLES; i++) {
543 if (con2fb_map[i] != -1)
544 retval = 1;
545 }
546 return retval;
547}
548
549static int fbcon_takeover(int show_logo)
550{
551 int err, i;
552
553 if (!num_registered_fb)
554 return -ENODEV;
555
556 if (!show_logo)
557 logo_shown = FBCON_LOGO_DONTSHOW;
558
559 for (i = first_fb_vc; i <= last_fb_vc; i++)
560 con2fb_map[i] = info_idx;
561
562 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
563 fbcon_is_default);
564 if (err) {
565 for (i = first_fb_vc; i <= last_fb_vc; i++) {
566 con2fb_map[i] = -1;
567 }
568 info_idx = -1;
569 }
570
571 return err;
572}
573
574static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
575 int cols, int rows, int new_cols, int new_rows)
576{
577 /* Need to make room for the logo */
9c44e5f6 578 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 579 int cnt, erase = vc->vc_video_erase_char, step;
580 unsigned short *save = NULL, *r, *q;
581
582 /*
583 * remove underline attribute from erase character
584 * if black and white framebuffer.
585 */
b8c90945 586 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 587 erase &= ~0x400;
9c44e5f6 588 logo_height = fb_prepare_logo(info, ops->rotate);
1da177e4
LT		 589 logo_lines = (logo_height + vc->vc_font.height - 1) /
590 vc->vc_font.height;
591 q = (unsigned short *) (vc->vc_origin +
592 vc->vc_size_row * rows);
593 step = logo_lines * cols;
594 for (r = q - logo_lines * cols; r < q; r++)
595 if (scr_readw(r) != vc->vc_video_erase_char)
596 break;
597 if (r != q && new_rows >= rows + logo_lines) {
598 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
599 if (save) {
600 int i = cols < new_cols ? cols : new_cols;
601 scr_memsetw(save, erase, logo_lines * new_cols * 2);
602 r = q - step;
603 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
604 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
605 r = q;
606 }
607 }
608 if (r == q) {
609 /* We can scroll screen down */
610 r = q - step - cols;
611 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
612 scr_memcpyw(r + step, r, vc->vc_size_row);
613 r -= cols;
614 }
615 if (!save) {
616 vc->vc_y += logo_lines;
617 vc->vc_pos += logo_lines * vc->vc_size_row;
618 }
619 }
620 scr_memsetw((unsigned short *) vc->vc_origin,
621 erase,
622 vc->vc_size_row * logo_lines);
623
624 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
625 fbcon_clear_margins(vc, 0);
626 update_screen(vc);
627 }
628
629 if (save) {
630 q = (unsigned short *) (vc->vc_origin +
631 vc->vc_size_row *
632 rows);
633 scr_memcpyw(q, save, logo_lines * new_cols * 2);
634 vc->vc_y += logo_lines;
635 vc->vc_pos += logo_lines * vc->vc_size_row;
636 kfree(save);
637 }
638
639 if (logo_lines > vc->vc_bottom) {
640 logo_shown = FBCON_LOGO_CANSHOW;
641 printk(KERN_INFO
642 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
643 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
644 logo_shown = FBCON_LOGO_DRAW;
645 vc->vc_top = logo_lines;
646 }
647}
648
649#ifdef CONFIG_FB_TILEBLITTING
b73deed3 650static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 651{
652 struct fbcon_ops *ops = info->fbcon_par;
653
b73deed3 654 ops->p = &fb_display[vc->vc_num];
ab767201 655
1da177e4 656 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 657 fbcon_set_tileops(vc, info);
e4fc2761 658 else {
b73deed3 659 fbcon_set_rotation(info);
1da177e4 660 fbcon_set_bitops(ops);
e4fc2761 661 }
1da177e4
LT		 662}
663#else
b73deed3 664static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 665{
666 struct fbcon_ops *ops = info->fbcon_par;
667
668 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 669 ops->p = &fb_display[vc->vc_num];
670 fbcon_set_rotation(info);
1da177e4
LT		 671 fbcon_set_bitops(ops);
672}
673#endif /* CONFIG_MISC_TILEBLITTING */
674
675
676static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
677 int unit, int oldidx)
678{
679 struct fbcon_ops *ops = NULL;
680 int err = 0;
681
682 if (!try_module_get(info->fbops->owner))
683 err = -ENODEV;
684
685 if (!err && info->fbops->fb_open &&
686 info->fbops->fb_open(info, 0))
687 err = -ENODEV;
688
689 if (!err) {
a39bc34e 690 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 691 if (!ops)
692 err = -ENOMEM;
693 }
694
695 if (!err) {
1da177e4 696 info->fbcon_par = ops;
b73deed3 697 set_blitting_type(vc, info);
1da177e4
LT		 698 }
699
700 if (err) {
701 con2fb_map[unit] = oldidx;
702 module_put(info->fbops->owner);
703 }
704
705 return err;
706}
707
708static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
709 struct fb_info *newinfo, int unit,
710 int oldidx, int found)
711{
712 struct fbcon_ops *ops = oldinfo->fbcon_par;
713 int err = 0;
714
715 if (oldinfo->fbops->fb_release &&
716 oldinfo->fbops->fb_release(oldinfo, 0)) {
717 con2fb_map[unit] = oldidx;
718 if (!found && newinfo->fbops->fb_release)
719 newinfo->fbops->fb_release(newinfo, 0);
720 if (!found)
721 module_put(newinfo->fbops->owner);
722 err = -ENODEV;
723 }
724
725 if (!err) {
88fb2c6e 726 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 727 kfree(ops->cursor_state.mask);
728 kfree(ops->cursor_data);
e4fc2761 729 kfree(ops->fontbuffer);
1da177e4
LT		 730 kfree(oldinfo->fbcon_par);
731 oldinfo->fbcon_par = NULL;
732 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 733 /*
734 If oldinfo and newinfo are driving the same hardware,
735 the fb_release() method of oldinfo may attempt to
736 restore the hardware state. This will leave the
737 newinfo in an undefined state. Thus, a call to
738 fb_set_par() may be needed for the newinfo.
739 */
740 if (newinfo->fbops->fb_set_par)
741 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 742 }
743
744 return err;
745}
746
1da177e4
LT		 747static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
748 int unit, int show_logo)
749{
750 struct fbcon_ops *ops = info->fbcon_par;
751
752 ops->currcon = fg_console;
753
754 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
755 info->fbops->fb_set_par(info);
756
757 ops->flags |= FBCON_FLAGS_INIT;
758 ops->graphics = 0;
759
760 if (vc)
761 fbcon_set_disp(info, &info->var, vc);
762 else
763 fbcon_preset_disp(info, &info->var, unit);
764
765 if (show_logo) {
766 struct vc_data *fg_vc = vc_cons[fg_console].d;
767 struct fb_info *fg_info =
768 registered_fb[con2fb_map[fg_console]];
769
770 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
771 fg_vc->vc_rows, fg_vc->vc_cols,
772 fg_vc->vc_rows);
773 }
774
775 update_screen(vc_cons[fg_console].d);
776}
777
778/**
779 * set_con2fb_map - map console to frame buffer device
780 * @unit: virtual console number to map
781 * @newidx: frame buffer index to map virtual console to
782 * @user: user request
783 *
784 * Maps a virtual console @unit to a frame buffer device
785 * @newidx.
786 */
787static int set_con2fb_map(int unit, int newidx, int user)
788{
789 struct vc_data *vc = vc_cons[unit].d;
790 int oldidx = con2fb_map[unit];
791 struct fb_info *info = registered_fb[newidx];
792 struct fb_info *oldinfo = NULL;
793 int found, err = 0;
794
795 if (oldidx == newidx)
796 return 0;
797
798 if (!info)
799 err = -EINVAL;
800
801 if (!err && !search_for_mapped_con()) {
802 info_idx = newidx;
803 return fbcon_takeover(0);
804 }
805
806 if (oldidx != -1)
807 oldinfo = registered_fb[oldidx];
808
809 found = search_fb_in_map(newidx);
810
811 acquire_console_sem();
812 con2fb_map[unit] = newidx;
813 if (!err && !found)
814 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
815
816
817 /*
818 * If old fb is not mapped to any of the consoles,
819 * fbcon should release it.
820 */
821 if (!err && oldinfo && !search_fb_in_map(oldidx))
822 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
823 found);
824
825 if (!err) {
826 int show_logo = (fg_console == 0 && !user &&
827 logo_shown != FBCON_LOGO_DONTSHOW);
828
829 if (!found)
88fb2c6e 830 fbcon_add_cursor_timer(info);
1da177e4
LT		 831 con2fb_map_boot[unit] = newidx;
832 con2fb_init_display(vc, info, unit, show_logo);
833 }
834
835 release_console_sem();
836 return err;
837}
838
839/*
840 * Low Level Operations
841 */
842/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
843static int var_to_display(struct display *disp,
844 struct fb_var_screeninfo *var,
845 struct fb_info *info)
846{
847 disp->xres_virtual = var->xres_virtual;
848 disp->yres_virtual = var->yres_virtual;
849 disp->bits_per_pixel = var->bits_per_pixel;
850 disp->grayscale = var->grayscale;
851 disp->nonstd = var->nonstd;
852 disp->accel_flags = var->accel_flags;
853 disp->height = var->height;
854 disp->width = var->width;
855 disp->red = var->red;
856 disp->green = var->green;
857 disp->blue = var->blue;
858 disp->transp = var->transp;
859 disp->rotate = var->rotate;
860 disp->mode = fb_match_mode(var, &info->modelist);
861 if (disp->mode == NULL)
862 /* This should not happen */
863 return -EINVAL;
864 return 0;
865}
866
867static void display_to_var(struct fb_var_screeninfo *var,
868 struct display *disp)
869{
870 fb_videomode_to_var(var, disp->mode);
871 var->xres_virtual = disp->xres_virtual;
872 var->yres_virtual = disp->yres_virtual;
873 var->bits_per_pixel = disp->bits_per_pixel;
874 var->grayscale = disp->grayscale;
875 var->nonstd = disp->nonstd;
876 var->accel_flags = disp->accel_flags;
877 var->height = disp->height;
878 var->width = disp->width;
879 var->red = disp->red;
880 var->green = disp->green;
881 var->blue = disp->blue;
882 var->transp = disp->transp;
883 var->rotate = disp->rotate;
884}
885
886static const char *fbcon_startup(void)
887{
888 const char *display_desc = "frame buffer device";
889 struct display *p = &fb_display[fg_console];
890 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 891 const struct font_desc *font = NULL;
1da177e4
LT		 892 struct module *owner;
893 struct fb_info *info = NULL;
894 struct fbcon_ops *ops;
895 int rows, cols;
896 int irqres;
897
898 irqres = 1;
899 /*
900 * If num_registered_fb is zero, this is a call for the dummy part.
901 * The frame buffer devices weren't initialized yet.
902 */
903 if (!num_registered_fb || info_idx == -1)
904 return display_desc;
905 /*
906 * Instead of blindly using registered_fb[0], we use info_idx, set by
907 * fb_console_init();
908 */
909 info = registered_fb[info_idx];
910 if (!info)
911 return NULL;
912
913 owner = info->fbops->owner;
914 if (!try_module_get(owner))
915 return NULL;
916 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
917 module_put(owner);
918 return NULL;
919 }
920
a39bc34e 921 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 922 if (!ops) {
923 module_put(owner);
924 return NULL;
925 }
926
1da177e4
LT		 927 ops->currcon = -1;
928 ops->graphics = 1;
e4fc2761 929 ops->cur_rotate = -1;
1da177e4 930 info->fbcon_par = ops;
e4fc2761 931 p->con_rotate = rotate;
b73deed3 932 set_blitting_type(vc, info);
1da177e4
LT		 933
934 if (info->fix.type != FB_TYPE_TEXT) {
935 if (fbcon_softback_size) {
936 if (!softback_buf) {
937 softback_buf =
938 (unsigned long)
939 kmalloc(fbcon_softback_size,
940 GFP_KERNEL);
941 if (!softback_buf) {
942 fbcon_softback_size = 0;
943 softback_top = 0;
944 }
945 }
946 } else {
947 if (softback_buf) {
948 kfree((void *) softback_buf);
949 softback_buf = 0;
950 softback_top = 0;
951 }
952 }
953 if (softback_buf)
954 softback_in = softback_top = softback_curr =
955 softback_buf;
956 softback_lines = 0;
957 }
958
959 /* Setup default font */
960 if (!p->fontdata) {
961 if (!fontname[0] || !(font = find_font(fontname)))
962 font = get_default_font(info->var.xres,
963 info->var.yres);
964 vc->vc_font.width = font->width;
965 vc->vc_font.height = font->height;
2f4516db 966 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 967 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
968 }
969
e4fc2761
AD		 970 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
971 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
972 cols /= vc->vc_font.width;
973 rows /= vc->vc_font.height;
1da177e4
LT		 974 vc_resize(vc, cols, rows);
975
976 DPRINTK("mode: %s\n", info->fix.id);
977 DPRINTK("visual: %d\n", info->fix.visual);
978 DPRINTK("res: %dx%d-%d\n", info->var.xres,
979 info->var.yres,
980 info->var.bits_per_pixel);
981
982#ifdef CONFIG_ATARI
983 if (MACH_IS_ATARI) {
984 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
985 irqres =
986 request_irq(IRQ_AUTO_4, fb_vbl_handler,
987 IRQ_TYPE_PRIO, "framebuffer vbl",
988 info);
989 }
990#endif /* CONFIG_ATARI */
991
992#ifdef CONFIG_MAC
993 /*
994 * On a Macintoy, the VBL interrupt may or may not be active.
995 * As interrupt based cursor is more reliable and race free, we
996 * probe for VBL interrupts.
997 */
998 if (MACH_IS_MAC) {
999 int ct = 0;
1000 /*
1001 * Probe for VBL: set temp. handler ...
1002 */
1003 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1004 "framebuffer vbl", info);
1005 vbl_detected = 0;
1006
1007 /*
1008 * ... and spin for 20 ms ...
1009 */
1010 while (!vbl_detected && ++ct < 1000)
1011 udelay(20);
1012
1013 if (ct == 1000)
1014 printk
1015 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1016
1017 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1018
1019 if (vbl_detected) {
1020 /*
1021 * interrupt based cursor ok
1022 */
1023 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1024 irqres =
1025 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1026 "framebuffer vbl", info);
1027 } else {
1028 /*
1029 * VBL not detected: fall through, use timer based cursor
1030 */
1031 irqres = 1;
1032 }
1033 }
1034#endif /* CONFIG_MAC */
1035
88fb2c6e 1036 fbcon_add_cursor_timer(info);
1da177e4
LT		 1037 return display_desc;
1038}
1039
1040static void fbcon_init(struct vc_data *vc, int init)
1041{
1042 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1043 struct fbcon_ops *ops;
1044 struct vc_data **default_mode = vc->vc_display_fg;
1045 struct vc_data *svc = *default_mode;
1046 struct display *t, *p = &fb_display[vc->vc_num];
1047 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 1048 int cap;
1da177e4
LT		 1049
1050 if (info_idx == -1 || info == NULL)
1051 return;
306958e8
AB		 1052
1053 cap = info->flags;
1054
1da177e4
LT		 1055 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1056 (info->fix.type == FB_TYPE_TEXT))
1057 logo = 0;
1058
1da177e4
LT		 1059 if (var_to_display(p, &info->var, info))
1060 return;
1061
1062 /* If we are not the first console on this
1063 fb, copy the font from that console */
1064 t = &fb_display[svc->vc_num];
1065 if (!vc->vc_font.data) {
2f4516db 1066 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1067 vc->vc_font.width = (*default_mode)->vc_font.width;
1068 vc->vc_font.height = (*default_mode)->vc_font.height;
1069 p->userfont = t->userfont;
1070 if (p->userfont)
1071 REFCOUNT(p->fontdata)++;
1072 }
1073 if (p->userfont)
1074 charcnt = FNTCHARCNT(p->fontdata);
b8c90945 1075 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1076 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1077 if (charcnt == 256) {
1078 vc->vc_hi_font_mask = 0;
1079 } else {
1080 vc->vc_hi_font_mask = 0x100;
1081 if (vc->vc_can_do_color)
1082 vc->vc_complement_mask <<= 1;
1083 }
1084
1085 if (!*svc->vc_uni_pagedir_loc)
1086 con_set_default_unimap(svc);
1087 if (!*vc->vc_uni_pagedir_loc)
1088 con_copy_unimap(vc, svc);
1089
e4fc2761
AD		 1090 ops = info->fbcon_par;
1091 p->con_rotate = rotate;
b73deed3 1092 set_blitting_type(vc, info);
e4fc2761 1093
1da177e4
LT		 1094 cols = vc->vc_cols;
1095 rows = vc->vc_rows;
e4fc2761
AD		 1096 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1097 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1098 new_cols /= vc->vc_font.width;
1099 new_rows /= vc->vc_font.height;
1da177e4
LT		 1100 vc_resize(vc, new_cols, new_rows);
1101
1da177e4
LT		 1102 /*
1103 * We must always set the mode. The mode of the previous console
1104 * driver could be in the same resolution but we are using different
1105 * hardware so we have to initialize the hardware.
1106 *
1107 * We need to do it in fbcon_init() to prevent screen corruption.
1108 */
d354d9af 1109 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1da177e4
LT		 1110 if (info->fbops->fb_set_par &&
1111 !(ops->flags & FBCON_FLAGS_INIT))
1112 info->fbops->fb_set_par(info);
1113 ops->flags |= FBCON_FLAGS_INIT;
1114 }
1115
1116 ops->graphics = 0;
1117
1118 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1119 !(cap & FBINFO_HWACCEL_DISABLED))
1120 p->scrollmode = SCROLL_MOVE;
1121 else /* default to something safe */
1122 p->scrollmode = SCROLL_REDRAW;
1123
1124 /*
1125 * ++guenther: console.c:vc_allocate() relies on initializing
1126 * vc_{cols,rows}, but we must not set those if we are only
1127 * resizing the console.
1128 */
1129 if (!init) {
1130 vc->vc_cols = new_cols;
1131 vc->vc_rows = new_rows;
1132 }
1133
1134 if (logo)
1135 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1136
4d9c5b6e
AD		 1137 if (vc == svc && softback_buf)
1138 fbcon_update_softback(vc);
e4fc2761 1139
b73deed3 1140 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 1141 ops->rotate = FB_ROTATE_UR;
b73deed3 1142 set_blitting_type(vc, info);
e4fc2761
AD		 1143 }
1144
1da177e4
LT		 1145}
1146
1147static void fbcon_deinit(struct vc_data *vc)
1148{
1149 struct display *p = &fb_display[vc->vc_num];
1150
1151 if (info_idx != -1)
1152 return;
1153 fbcon_free_font(p);
1154}
1155
1156/* ====================================================================== */
1157
1158/* fbcon_XXX routines - interface used by the world
1159 *
1160 * This system is now divided into two levels because of complications
1161 * caused by hardware scrolling. Top level functions:
1162 *
1163 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1164 *
1165 * handles y values in range [0, scr_height-1] that correspond to real
1166 * screen positions. y_wrap shift means that first line of bitmap may be
1167 * anywhere on this display. These functions convert lineoffsets to
1168 * bitmap offsets and deal with the wrap-around case by splitting blits.
1169 *
1170 * fbcon_bmove_physical_8() -- These functions fast implementations
1171 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1172 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1173 *
1174 * WARNING:
1175 *
1176 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1177 * Implies should only really hardware scroll in rows. Only reason for
1178 * restriction is simplicity & efficiency at the moment.
1179 */
1180
1da177e4
LT		 1181static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1182 int width)
1183{
1184 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1185 struct fbcon_ops *ops = info->fbcon_par;
1186
1187 struct display *p = &fb_display[vc->vc_num];
1188 u_int y_break;
1189
1190 if (fbcon_is_inactive(vc, info))
1191 return;
1192
1193 if (!height || !width)
1194 return;
1195
1196 /* Split blits that cross physical y_wrap boundary */
1197
1198 y_break = p->vrows - p->yscroll;
1199 if (sy < y_break && sy + height - 1 >= y_break) {
1200 u_int b = y_break - sy;
1201 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1202 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1203 width);
1204 } else
1205 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1206}
1207
1208static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1209 int count, int ypos, int xpos)
1210{
1211 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1212 struct display *p = &fb_display[vc->vc_num];
1213 struct fbcon_ops *ops = info->fbcon_par;
1214
1215 if (!fbcon_is_inactive(vc, info))
1216 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1217 get_color(vc, info, scr_readw(s), 1),
1218 get_color(vc, info, scr_readw(s), 0));
1219}
1220
1221static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1222{
1223 unsigned short chr;
1224
1225 scr_writew(c, &chr);
1226 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1227}
1228
1229static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1230{
1231 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1232 struct fbcon_ops *ops = info->fbcon_par;
1233
1234 if (!fbcon_is_inactive(vc, info))
1235 ops->clear_margins(vc, info, bottom_only);
1236}
1237
1238static void fbcon_cursor(struct vc_data *vc, int mode)
1239{
1240 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1241 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1242 int y;
1243 int c = scr_readw((u16 *) vc->vc_pos);
1244
1245 if (fbcon_is_inactive(vc, info))
1246 return;
1247
1248 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1249 if (mode & CM_SOFTBACK) {
1250 mode &= ~CM_SOFTBACK;
1251 y = softback_lines;
1252 } else {
1253 if (softback_lines)
1254 fbcon_set_origin(vc);
1255 y = 0;
1256 }
1257
b73deed3 1258 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1da177e4
LT		 1259 get_color(vc, info, c, 0));
1260 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1261}
1262
1263static int scrollback_phys_max = 0;
1264static int scrollback_max = 0;
1265static int scrollback_current = 0;
1266
1da177e4
LT		 1267/*
1268 * If no vc is existent yet, just set struct display
1269 */
1270static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1271 int unit)
1272{
1273 struct display *p = &fb_display[unit];
1274 struct display *t = &fb_display[fg_console];
1275
1da177e4
LT		 1276 if (var_to_display(p, var, info))
1277 return;
1278
1279 p->fontdata = t->fontdata;
1280 p->userfont = t->userfont;
1281 if (p->userfont)
1282 REFCOUNT(p->fontdata)++;
1283}
1284
1285static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1286 struct vc_data *vc)
1287{
1288 struct display *p = &fb_display[vc->vc_num], *t;
1289 struct vc_data **default_mode = vc->vc_display_fg;
1290 struct vc_data *svc = *default_mode;
e4fc2761 1291 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1292 int rows, cols, charcnt = 256;
1293
1da177e4
LT		 1294 if (var_to_display(p, var, info))
1295 return;
1296 t = &fb_display[svc->vc_num];
1297 if (!vc->vc_font.data) {
2f4516db 1298 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1da177e4
LT		 1299 vc->vc_font.width = (*default_mode)->vc_font.width;
1300 vc->vc_font.height = (*default_mode)->vc_font.height;
1301 p->userfont = t->userfont;
1302 if (p->userfont)
1303 REFCOUNT(p->fontdata)++;
1304 }
1305 if (p->userfont)
1306 charcnt = FNTCHARCNT(p->fontdata);
1307
b8c90945
AD		 1308 var->activate = FB_ACTIVATE_NOW;
1309 info->var.activate = var->activate;
e4fc2761
AD		 1310 var->yoffset = info->var.yoffset;
1311 var->xoffset = info->var.xoffset;
b8c90945 1312 fb_set_var(info, var);
e4fc2761 1313 ops->var = info->var;
b8c90945 1314 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1315 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1316 if (charcnt == 256) {
1317 vc->vc_hi_font_mask = 0;
1318 } else {
1319 vc->vc_hi_font_mask = 0x100;
1320 if (vc->vc_can_do_color)
1321 vc->vc_complement_mask <<= 1;
1322 }
1323
1324 if (!*svc->vc_uni_pagedir_loc)
1325 con_set_default_unimap(svc);
1326 if (!*vc->vc_uni_pagedir_loc)
1327 con_copy_unimap(vc, svc);
1328
e4fc2761
AD		 1329 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1330 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1331 cols /= vc->vc_font.width;
1332 rows /= vc->vc_font.height;
1da177e4 1333 vc_resize(vc, cols, rows);
e4fc2761 1334
1da177e4
LT		 1335 if (CON_IS_VISIBLE(vc)) {
1336 update_screen(vc);
4d9c5b6e
AD		 1337 if (softback_buf)
1338 fbcon_update_softback(vc);
1da177e4
LT		 1339 }
1340}
1341
1342static __inline__ void ywrap_up(struct vc_data *vc, int count)
1343{
1344 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1345 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1346 struct display *p = &fb_display[vc->vc_num];
1347
1348 p->yscroll += count;
1349 if (p->yscroll >= p->vrows) /* Deal with wrap */
1350 p->yscroll -= p->vrows;
e4fc2761
AD		 1351 ops->var.xoffset = 0;
1352 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1353 ops->var.vmode |= FB_VMODE_YWRAP;
1354 ops->update_start(info);
1da177e4
LT		 1355 scrollback_max += count;
1356 if (scrollback_max > scrollback_phys_max)
1357 scrollback_max = scrollback_phys_max;
1358 scrollback_current = 0;
1359}
1360
1361static __inline__ void ywrap_down(struct vc_data *vc, int count)
1362{
1363 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1364 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1365 struct display *p = &fb_display[vc->vc_num];
1366
1367 p->yscroll -= count;
1368 if (p->yscroll < 0) /* Deal with wrap */
1369 p->yscroll += p->vrows;
e4fc2761
AD		 1370 ops->var.xoffset = 0;
1371 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1372 ops->var.vmode |= FB_VMODE_YWRAP;
1373 ops->update_start(info);
1da177e4
LT		 1374 scrollback_max -= count;
1375 if (scrollback_max < 0)
1376 scrollback_max = 0;
1377 scrollback_current = 0;
1378}
1379
1380static __inline__ void ypan_up(struct vc_data *vc, int count)
1381{
1382 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1383 struct display *p = &fb_display[vc->vc_num];
1384 struct fbcon_ops *ops = info->fbcon_par;
1385
1386 p->yscroll += count;
1387 if (p->yscroll > p->vrows - vc->vc_rows) {
1388 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1389 0, 0, 0, vc->vc_rows, vc->vc_cols);
1390 p->yscroll -= p->vrows - vc->vc_rows;
1391 }
e4fc2761
AD		 1392
1393 ops->var.xoffset = 0;
1394 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1395 ops->var.vmode &= ~FB_VMODE_YWRAP;
1396 ops->update_start(info);
1da177e4
LT		 1397 fbcon_clear_margins(vc, 1);
1398 scrollback_max += count;
1399 if (scrollback_max > scrollback_phys_max)
1400 scrollback_max = scrollback_phys_max;
1401 scrollback_current = 0;
1402}
1403
1404static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1405{
1406 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1407 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1408 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1409
1410 p->yscroll += count;
a39bc34e 1411
1da177e4
LT		 1412 if (p->yscroll > p->vrows - vc->vc_rows) {
1413 p->yscroll -= p->vrows - vc->vc_rows;
1da177e4 1414 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
a39bc34e 1415 }
e4fc2761
AD		 1416
1417 ops->var.xoffset = 0;
1418 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1419 ops->var.vmode &= ~FB_VMODE_YWRAP;
1420 ops->update_start(info);
1da177e4
LT		 1421 fbcon_clear_margins(vc, 1);
1422 scrollback_max += count;
1423 if (scrollback_max > scrollback_phys_max)
1424 scrollback_max = scrollback_phys_max;
1425 scrollback_current = 0;
1426}
1427
1428static __inline__ void ypan_down(struct vc_data *vc, int count)
1429{
1430 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1431 struct display *p = &fb_display[vc->vc_num];
1432 struct fbcon_ops *ops = info->fbcon_par;
1433
1434 p->yscroll -= count;
1435 if (p->yscroll < 0) {
1436 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1437 0, vc->vc_rows, vc->vc_cols);
1438 p->yscroll += p->vrows - vc->vc_rows;
1439 }
e4fc2761
AD		 1440
1441 ops->var.xoffset = 0;
1442 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1443 ops->var.vmode &= ~FB_VMODE_YWRAP;
1444 ops->update_start(info);
1da177e4
LT		 1445 fbcon_clear_margins(vc, 1);
1446 scrollback_max -= count;
1447 if (scrollback_max < 0)
1448 scrollback_max = 0;
1449 scrollback_current = 0;
1450}
1451
1452static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1453{
1454 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1455 struct fbcon_ops *ops = info->fbcon_par;
1da177e4 1456 struct display *p = &fb_display[vc->vc_num];
1da177e4
LT		 1457
1458 p->yscroll -= count;
a39bc34e 1459
1da177e4
LT		 1460 if (p->yscroll < 0) {
1461 p->yscroll += p->vrows - vc->vc_rows;
1da177e4 1462 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
a39bc34e 1463 }
e4fc2761
AD		 1464
1465 ops->var.xoffset = 0;
1466 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1467 ops->var.vmode &= ~FB_VMODE_YWRAP;
1468 ops->update_start(info);
1da177e4
LT		 1469 fbcon_clear_margins(vc, 1);
1470 scrollback_max -= count;
1471 if (scrollback_max < 0)
1472 scrollback_max = 0;
1473 scrollback_current = 0;
1474}
1475
1476static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1477 long delta)
1478{
1479 int count = vc->vc_rows;
1480 unsigned short *d, *s;
1481 unsigned long n;
1482 int line = 0;
1483
1484 d = (u16 *) softback_curr;
1485 if (d == (u16 *) softback_in)
1486 d = (u16 *) vc->vc_origin;
1487 n = softback_curr + delta * vc->vc_size_row;
1488 softback_lines -= delta;
1489 if (delta < 0) {
1490 if (softback_curr < softback_top && n < softback_buf) {
1491 n += softback_end - softback_buf;
1492 if (n < softback_top) {
1493 softback_lines -=
1494 (softback_top - n) / vc->vc_size_row;
1495 n = softback_top;
1496 }
1497 } else if (softback_curr >= softback_top
1498 && n < softback_top) {
1499 softback_lines -=
1500 (softback_top - n) / vc->vc_size_row;
1501 n = softback_top;
1502 }
1503 } else {
1504 if (softback_curr > softback_in && n >= softback_end) {
1505 n += softback_buf - softback_end;
1506 if (n > softback_in) {
1507 n = softback_in;
1508 softback_lines = 0;
1509 }
1510 } else if (softback_curr <= softback_in && n > softback_in) {
1511 n = softback_in;
1512 softback_lines = 0;
1513 }
1514 }
1515 if (n == softback_curr)
1516 return;
1517 softback_curr = n;
1518 s = (u16 *) softback_curr;
1519 if (s == (u16 *) softback_in)
1520 s = (u16 *) vc->vc_origin;
1521 while (count--) {
1522 unsigned short *start;
1523 unsigned short *le;
1524 unsigned short c;
1525 int x = 0;
1526 unsigned short attr = 1;
1527
1528 start = s;
1529 le = advance_row(s, 1);
1530 do {
1531 c = scr_readw(s);
1532 if (attr != (c & 0xff00)) {
1533 attr = c & 0xff00;
1534 if (s > start) {
1535 fbcon_putcs(vc, start, s - start,
1536 line, x);
1537 x += s - start;
1538 start = s;
1539 }
1540 }
1541 if (c == scr_readw(d)) {
1542 if (s > start) {
1543 fbcon_putcs(vc, start, s - start,
1544 line, x);
1545 x += s - start + 1;
1546 start = s + 1;
1547 } else {
1548 x++;
1549 start++;
1550 }
1551 }
1552 s++;
1553 d++;
1554 } while (s < le);
1555 if (s > start)
1556 fbcon_putcs(vc, start, s - start, line, x);
1557 line++;
1558 if (d == (u16 *) softback_end)
1559 d = (u16 *) softback_buf;
1560 if (d == (u16 *) softback_in)
1561 d = (u16 *) vc->vc_origin;
1562 if (s == (u16 *) softback_end)
1563 s = (u16 *) softback_buf;
1564 if (s == (u16 *) softback_in)
1565 s = (u16 *) vc->vc_origin;
1566 }
1567}
1568
1569static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1570 int line, int count, int dy)
1571{
1572 unsigned short *s = (unsigned short *)
1573 (vc->vc_origin + vc->vc_size_row * line);
1574
1575 while (count--) {
1576 unsigned short *start = s;
1577 unsigned short *le = advance_row(s, 1);
1578 unsigned short c;
1579 int x = 0;
1580 unsigned short attr = 1;
1581
1582 do {
1583 c = scr_readw(s);
1584 if (attr != (c & 0xff00)) {
1585 attr = c & 0xff00;
1586 if (s > start) {
1587 fbcon_putcs(vc, start, s - start,
1588 dy, x);
1589 x += s - start;
1590 start = s;
1591 }
1592 }
1593 console_conditional_schedule();
1594 s++;
1595 } while (s < le);
1596 if (s > start)
1597 fbcon_putcs(vc, start, s - start, dy, x);
1598 console_conditional_schedule();
1599 dy++;
1600 }
1601}
1602
1603static void fbcon_redraw(struct vc_data *vc, struct display *p,
1604 int line, int count, int offset)
1605{
1606 unsigned short *d = (unsigned short *)
1607 (vc->vc_origin + vc->vc_size_row * line);
1608 unsigned short *s = d + offset;
1609
1610 while (count--) {
1611 unsigned short *start = s;
1612 unsigned short *le = advance_row(s, 1);
1613 unsigned short c;
1614 int x = 0;
1615 unsigned short attr = 1;
1616
1617 do {
1618 c = scr_readw(s);
1619 if (attr != (c & 0xff00)) {
1620 attr = c & 0xff00;
1621 if (s > start) {
1622 fbcon_putcs(vc, start, s - start,
1623 line, x);
1624 x += s - start;
1625 start = s;
1626 }
1627 }
1628 if (c == scr_readw(d)) {
1629 if (s > start) {
1630 fbcon_putcs(vc, start, s - start,
1631 line, x);
1632 x += s - start + 1;
1633 start = s + 1;
1634 } else {
1635 x++;
1636 start++;
1637 }
1638 }
1639 scr_writew(c, d);
1640 console_conditional_schedule();
1641 s++;
1642 d++;
1643 } while (s < le);
1644 if (s > start)
1645 fbcon_putcs(vc, start, s - start, line, x);
1646 console_conditional_schedule();
1647 if (offset > 0)
1648 line++;
1649 else {
1650 line--;
1651 /* NOTE: We subtract two lines from these pointers */
1652 s -= vc->vc_size_row;
1653 d -= vc->vc_size_row;
1654 }
1655 }
1656}
1657
1658static inline void fbcon_softback_note(struct vc_data *vc, int t,
1659 int count)
1660{
1661 unsigned short *p;
1662
1663 if (vc->vc_num != fg_console)
1664 return;
1665 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1666
1667 while (count) {
1668 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1669 count--;
1670 p = advance_row(p, 1);
1671 softback_in += vc->vc_size_row;
1672 if (softback_in == softback_end)
1673 softback_in = softback_buf;
1674 if (softback_in == softback_top) {
1675 softback_top += vc->vc_size_row;
1676 if (softback_top == softback_end)
1677 softback_top = softback_buf;
1678 }
1679 }
1680 softback_curr = softback_in;
1681}
1682
1683static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1684 int count)
1685{
1686 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1687 struct display *p = &fb_display[vc->vc_num];
1688 struct fbcon_ops *ops = info->fbcon_par;
1689 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1690
1691 if (fbcon_is_inactive(vc, info))
1692 return -EINVAL;
1693
1694 fbcon_cursor(vc, CM_ERASE);
1695
1696 /*
1697 * ++Geert: Only use ywrap/ypan if the console is in text mode
1698 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1699 * whole screen (prevents flicker).
1700 */
1701
1702 switch (dir) {
1703 case SM_UP:
1704 if (count > vc->vc_rows) /* Maximum realistic size */
1705 count = vc->vc_rows;
1706 if (softback_top)
1707 fbcon_softback_note(vc, t, count);
1708 if (logo_shown >= 0)
1709 goto redraw_up;
1710 switch (p->scrollmode) {
1711 case SCROLL_MOVE:
1712 ops->bmove(vc, info, t + count, 0, t, 0,
1713 b - t - count, vc->vc_cols);
1714 ops->clear(vc, info, b - count, 0, count,
1715 vc->vc_cols);
1716 break;
1717
1718 case SCROLL_WRAP_MOVE:
1719 if (b - t - count > 3 * vc->vc_rows >> 2) {
1720 if (t > 0)
1721 fbcon_bmove(vc, 0, 0, count, 0, t,
1722 vc->vc_cols);
1723 ywrap_up(vc, count);
1724 if (vc->vc_rows - b > 0)
1725 fbcon_bmove(vc, b - count, 0, b, 0,
1726 vc->vc_rows - b,
1727 vc->vc_cols);
1728 } else if (info->flags & FBINFO_READS_FAST)
1729 fbcon_bmove(vc, t + count, 0, t, 0,
1730 b - t - count, vc->vc_cols);
1731 else
1732 goto redraw_up;
1733 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1734 break;
1735
1736 case SCROLL_PAN_REDRAW:
1737 if ((p->yscroll + count <=
1738 2 * (p->vrows - vc->vc_rows))
1739 && ((!scroll_partial && (b - t == vc->vc_rows))
1740 || (scroll_partial
1741 && (b - t - count >
1742 3 * vc->vc_rows >> 2)))) {
1743 if (t > 0)
1744 fbcon_redraw_move(vc, p, 0, t, count);
1745 ypan_up_redraw(vc, t, count);
1746 if (vc->vc_rows - b > 0)
1747 fbcon_redraw_move(vc, p, b - count,
1748 vc->vc_rows - b, b);
1749 } else
1750 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1751 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1752 break;
1753
1754 case SCROLL_PAN_MOVE:
1755 if ((p->yscroll + count <=
1756 2 * (p->vrows - vc->vc_rows))
1757 && ((!scroll_partial && (b - t == vc->vc_rows))
1758 || (scroll_partial
1759 && (b - t - count >
1760 3 * vc->vc_rows >> 2)))) {
1761 if (t > 0)
1762 fbcon_bmove(vc, 0, 0, count, 0, t,
1763 vc->vc_cols);
1764 ypan_up(vc, count);
1765 if (vc->vc_rows - b > 0)
1766 fbcon_bmove(vc, b - count, 0, b, 0,
1767 vc->vc_rows - b,
1768 vc->vc_cols);
1769 } else if (info->flags & FBINFO_READS_FAST)
1770 fbcon_bmove(vc, t + count, 0, t, 0,
1771 b - t - count, vc->vc_cols);
1772 else
1773 goto redraw_up;
1774 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1775 break;
1776
1777 case SCROLL_REDRAW:
1778 redraw_up:
1779 fbcon_redraw(vc, p, t, b - t - count,
1780 count * vc->vc_cols);
1781 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1782 scr_memsetw((unsigned short *) (vc->vc_origin +
1783 vc->vc_size_row *
1784 (b - count)),
1785 vc->vc_video_erase_char,
1786 vc->vc_size_row * count);
1787 return 1;
1788 }
1789 break;
1790
1791 case SM_DOWN:
1792 if (count > vc->vc_rows) /* Maximum realistic size */
1793 count = vc->vc_rows;
e703ecc3
JB		 1794 if (logo_shown >= 0)
1795 goto redraw_down;
1da177e4
LT		 1796 switch (p->scrollmode) {
1797 case SCROLL_MOVE:
1798 ops->bmove(vc, info, t, 0, t + count, 0,
1799 b - t - count, vc->vc_cols);
1800 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1801 break;
1802
1803 case SCROLL_WRAP_MOVE:
1804 if (b - t - count > 3 * vc->vc_rows >> 2) {
1805 if (vc->vc_rows - b > 0)
1806 fbcon_bmove(vc, b, 0, b - count, 0,
1807 vc->vc_rows - b,
1808 vc->vc_cols);
1809 ywrap_down(vc, count);
1810 if (t > 0)
1811 fbcon_bmove(vc, count, 0, 0, 0, t,
1812 vc->vc_cols);
1813 } else if (info->flags & FBINFO_READS_FAST)
1814 fbcon_bmove(vc, t, 0, t + count, 0,
1815 b - t - count, vc->vc_cols);
1816 else
1817 goto redraw_down;
1818 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1819 break;
1820
1821 case SCROLL_PAN_MOVE:
1822 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1823 && ((!scroll_partial && (b - t == vc->vc_rows))
1824 || (scroll_partial
1825 && (b - t - count >
1826 3 * vc->vc_rows >> 2)))) {
1827 if (vc->vc_rows - b > 0)
1828 fbcon_bmove(vc, b, 0, b - count, 0,
1829 vc->vc_rows - b,
1830 vc->vc_cols);
1831 ypan_down(vc, count);
1832 if (t > 0)
1833 fbcon_bmove(vc, count, 0, 0, 0, t,
1834 vc->vc_cols);
1835 } else if (info->flags & FBINFO_READS_FAST)
1836 fbcon_bmove(vc, t, 0, t + count, 0,
1837 b - t - count, vc->vc_cols);
1838 else
1839 goto redraw_down;
1840 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1841 break;
1842
1843 case SCROLL_PAN_REDRAW:
1844 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1845 && ((!scroll_partial && (b - t == vc->vc_rows))
1846 || (scroll_partial
1847 && (b - t - count >
1848 3 * vc->vc_rows >> 2)))) {
1849 if (vc->vc_rows - b > 0)
1850 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1851 b - count);
1852 ypan_down_redraw(vc, t, count);
1853 if (t > 0)
1854 fbcon_redraw_move(vc, p, count, t, 0);
1855 } else
1856 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1857 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1858 break;
1859
1860 case SCROLL_REDRAW:
1861 redraw_down:
1862 fbcon_redraw(vc, p, b - 1, b - t - count,
1863 -count * vc->vc_cols);
1864 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1865 scr_memsetw((unsigned short *) (vc->vc_origin +
1866 vc->vc_size_row *
1867 t),
1868 vc->vc_video_erase_char,
1869 vc->vc_size_row * count);
1870 return 1;
1871 }
1872 }
1873 return 0;
1874}
1875
1876
1877static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1878 int height, int width)
1879{
1880 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1881 struct display *p = &fb_display[vc->vc_num];
1882
1883 if (fbcon_is_inactive(vc, info))
1884 return;
1885
1886 if (!width || !height)
1887 return;
1888
1889 /* Split blits that cross physical y_wrap case.
1890 * Pathological case involves 4 blits, better to use recursive
1891 * code rather than unrolled case
1892 *
1893 * Recursive invocations don't need to erase the cursor over and
1894 * over again, so we use fbcon_bmove_rec()
1895 */
1896 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1897 p->vrows - p->yscroll);
1898}
1899
1900static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1901 int dy, int dx, int height, int width, u_int y_break)
1902{
1903 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1904 struct fbcon_ops *ops = info->fbcon_par;
1905 u_int b;
1906
1907 if (sy < y_break && sy + height > y_break) {
1908 b = y_break - sy;
1909 if (dy < sy) { /* Avoid trashing self */
1910 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1911 y_break);
1912 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1913 height - b, width, y_break);
1914 } else {
1915 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1916 height - b, width, y_break);
1917 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1918 y_break);
1919 }
1920 return;
1921 }
1922
1923 if (dy < y_break && dy + height > y_break) {
1924 b = y_break - dy;
1925 if (dy < sy) { /* Avoid trashing self */
1926 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1927 y_break);
1928 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1929 height - b, width, y_break);
1930 } else {
1931 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1932 height - b, width, y_break);
1933 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1934 y_break);
1935 }
1936 return;
1937 }
1938 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1939 height, width);
1940}
1941
e4fc2761
AD		 1942static __inline__ void updatescrollmode(struct display *p,
1943 struct fb_info *info,
1da177e4
LT		 1944 struct vc_data *vc)
1945{
e4fc2761 1946 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1947 int fh = vc->vc_font.height;
1948 int cap = info->flags;
e4fc2761
AD		 1949 u16 t = 0;
1950 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1951 info->fix.xpanstep);
1952 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1953 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1954 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1955 info->var.xres_virtual);
1956 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1957 divides(ypan, vc->vc_font.height) && vyres > yres;
1958 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1959 divides(ywrap, vc->vc_font.height) &&
244ab72d
KP		 1960 divides(vc->vc_font.height, vyres) &&
1961 divides(vc->vc_font.height, yres);
1da177e4 1962 int reading_fast = cap & FBINFO_READS_FAST;
e4fc2761
AD		 1963 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1964 !(cap & FBINFO_HWACCEL_DISABLED);
1965 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1966 !(cap & FBINFO_HWACCEL_DISABLED);
1967
1968 p->vrows = vyres/fh;
1969 if (yres > (fh * (vc->vc_rows + 1)))
1970 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1971 if ((yres % fh) && (vyres % fh < yres % fh))
1da177e4
LT		 1972 p->vrows--;
1973
1974 if (good_wrap || good_pan) {
1975 if (reading_fast || fast_copyarea)
e4fc2761
AD		 1976 p->scrollmode = good_wrap ?
1977 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1da177e4
LT		 1978 else
1979 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1980 SCROLL_PAN_REDRAW;
1981 } else {
1982 if (reading_fast || (fast_copyarea && !fast_imageblit))
1983 p->scrollmode = SCROLL_MOVE;
1984 else
1985 p->scrollmode = SCROLL_REDRAW;
1986 }
1987}
1988
1989static int fbcon_resize(struct vc_data *vc, unsigned int width,
1990 unsigned int height)
1991{
1992 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 1993 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 1994 struct display *p = &fb_display[vc->vc_num];
1995 struct fb_var_screeninfo var = info->var;
e4fc2761
AD		 1996 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
1997
1998 virt_w = FBCON_SWAP(ops->rotate, width, height);
1999 virt_h = FBCON_SWAP(ops->rotate, height, width);
2000 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2001 vc->vc_font.height);
2002 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2003 vc->vc_font.width);
2004 var.xres = virt_w * virt_fw;
2005 var.yres = virt_h * virt_fh;
1da177e4
LT		 2006 x_diff = info->var.xres - var.xres;
2007 y_diff = info->var.yres - var.yres;
e4fc2761
AD		 2008 if (x_diff < 0 || x_diff > virt_fw ||
2009 y_diff < 0 || y_diff > virt_fh) {
1da177e4
LT		 2010 struct fb_videomode *mode;
2011
2012 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2013 mode = fb_find_best_mode(&var, &info->modelist);
2014 if (mode == NULL)
2015 return -EINVAL;
3084a895 2016 display_to_var(&var, p);
1da177e4 2017 fb_videomode_to_var(&var, mode);
3084a895 2018
e4fc2761 2019 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
1da177e4 2020 return -EINVAL;
1da177e4
LT		 2021
2022 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2023 if (CON_IS_VISIBLE(vc)) {
2024 var.activate = FB_ACTIVATE_NOW |
2025 FB_ACTIVATE_FORCE;
2026 fb_set_var(info, &var);
2027 }
2028 var_to_display(p, &info->var, info);
e4fc2761 2029 ops->var = info->var;
1da177e4
LT		 2030 }
2031 updatescrollmode(p, info, vc);
2032 return 0;
2033}
2034
2035static int fbcon_switch(struct vc_data *vc)
2036{
88fb2c6e 2037 struct fb_info *info, *old_info = NULL;
e4fc2761 2038 struct fbcon_ops *ops;
1da177e4
LT		 2039 struct display *p = &fb_display[vc->vc_num];
2040 struct fb_var_screeninfo var;
56f0d64d 2041 int i, prev_console, charcnt = 256;
1da177e4
LT		 2042
2043 info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2044 ops = info->fbcon_par;
1da177e4
LT		 2045
2046 if (softback_top) {
1da177e4
LT		 2047 if (softback_lines)
2048 fbcon_set_origin(vc);
2049 softback_top = softback_curr = softback_in = softback_buf;
2050 softback_lines = 0;
4d9c5b6e 2051 fbcon_update_softback(vc);
1da177e4
LT		 2052 }
2053
2054 if (logo_shown >= 0) {
2055 struct vc_data *conp2 = vc_cons[logo_shown].d;
2056
2057 if (conp2->vc_top == logo_lines
2058 && conp2->vc_bottom == conp2->vc_rows)
2059 conp2->vc_top = 0;
2060 logo_shown = FBCON_LOGO_CANSHOW;
2061 }
2062
e4fc2761 2063 prev_console = ops->currcon;
88fb2c6e
AD		 2064 if (prev_console != -1)
2065 old_info = registered_fb[con2fb_map[prev_console]];
1da177e4
LT		 2066 /*
2067 * FIXME: If we have multiple fbdev's loaded, we need to
2068 * update all info->currcon. Perhaps, we can place this
2069 * in a centralized structure, but this might break some
2070 * drivers.
2071 *
2072 * info->currcon = vc->vc_num;
2073 */
2074 for (i = 0; i < FB_MAX; i++) {
2075 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
e4fc2761 2076 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
1da177e4 2077
e4fc2761 2078 o->currcon = vc->vc_num;
1da177e4
LT		 2079 }
2080 }
2081 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2082 display_to_var(&var, p);
2083 var.activate = FB_ACTIVATE_NOW;
2084
2085 /*
2086 * make sure we don't unnecessarily trip the memcmp()
2087 * in fb_set_var()
2088 */
2089 info->var.activate = var.activate;
e4fc2761
AD		 2090 var.yoffset = info->var.yoffset;
2091 var.xoffset = info->var.xoffset;
2092 var.vmode = info->var.vmode;
1da177e4 2093 fb_set_var(info, &var);
e4fc2761 2094 ops->var = info->var;
1da177e4 2095
39942fd8
KP		 2096 if (old_info != NULL && (old_info != info ||
2097 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
88fb2c6e
AD		 2098 if (info->fbops->fb_set_par)
2099 info->fbops->fb_set_par(info);
a39bc34e
AD		 2100
2101 if (old_info != info) {
2102 fbcon_del_cursor_timer(old_info);
2103 fbcon_add_cursor_timer(info);
2104 }
88fb2c6e 2105 }
1da177e4 2106
b73deed3 2107 set_blitting_type(vc, info);
e4fc2761
AD		 2108 ops->cursor_reset = 1;
2109
b73deed3 2110 if (ops->rotate_font && ops->rotate_font(info, vc)) {
e4fc2761 2111 ops->rotate = FB_ROTATE_UR;
b73deed3 2112 set_blitting_type(vc, info);
e4fc2761 2113 }
1da177e4 2114
b8c90945 2115 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4 2116 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
56f0d64d
AD		 2117
2118 if (p->userfont)
2119 charcnt = FNTCHARCNT(vc->vc_font.data);
2120
2121 if (charcnt > 256)
2122 vc->vc_complement_mask <<= 1;
2123
1da177e4
LT		 2124 updatescrollmode(p, info, vc);
2125
2126 switch (p->scrollmode) {
2127 case SCROLL_WRAP_MOVE:
2128 scrollback_phys_max = p->vrows - vc->vc_rows;
2129 break;
2130 case SCROLL_PAN_MOVE:
2131 case SCROLL_PAN_REDRAW:
2132 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2133 if (scrollback_phys_max < 0)
2134 scrollback_phys_max = 0;
2135 break;
2136 default:
2137 scrollback_phys_max = 0;
2138 break;
2139 }
e4fc2761 2140
1da177e4
LT		 2141 scrollback_max = 0;
2142 scrollback_current = 0;
4e1567d3
AD		 2143
2144 if (!fbcon_is_inactive(vc, info)) {
2145 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2146 ops->update_start(info);
2147 }
2148
1da177e4
LT		 2149 fbcon_set_palette(vc, color_table);
2150 fbcon_clear_margins(vc, 0);
2151
2152 if (logo_shown == FBCON_LOGO_DRAW) {
2153
2154 logo_shown = fg_console;
2155 /* This is protected above by initmem_freed */
9c44e5f6 2156 fb_show_logo(info, ops->rotate);
1da177e4
LT		 2157 update_region(vc,
2158 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2159 vc->vc_size_row * (vc->vc_bottom -
2160 vc->vc_top) / 2);
2161 return 0;
2162 }
2163 return 1;
2164}
2165
2166static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2167 int blank)
2168{
2169 if (blank) {
2170 unsigned short charmask = vc->vc_hi_font_mask ?
2171 0x1ff : 0xff;
2172 unsigned short oldc;
2173
2174 oldc = vc->vc_video_erase_char;
2175 vc->vc_video_erase_char &= charmask;
2176 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2177 vc->vc_video_erase_char = oldc;
2178 }
2179}
2180
2181static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2182{
2183 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2184 struct fbcon_ops *ops = info->fbcon_par;
2185
2186 if (mode_switch) {
2187 struct fb_var_screeninfo var = info->var;
2188
2189 ops->graphics = 1;
2190
2191 if (!blank) {
47434847
AD		 2192 if (info->fbops->fb_save_state)
2193 info->fbops->fb_save_state(info);
1da177e4
LT		 2194 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2195 fb_set_var(info, &var);
2196 ops->graphics = 0;
e4fc2761 2197 ops->var = info->var;
47434847
AD		 2198 } else if (info->fbops->fb_restore_state)
2199 info->fbops->fb_restore_state(info);
1da177e4
LT		 2200 }
2201
2202 if (!fbcon_is_inactive(vc, info)) {
2203 if (ops->blank_state != blank) {
2204 ops->blank_state = blank;
2205 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2206 ops->cursor_flash = (!blank);
2207
2208 if (fb_blank(info, blank))
2209 fbcon_generic_blank(vc, info, blank);
2210 }
2211
88fb2c6e
AD		 2212 if (!blank)
2213 update_screen(vc);
2214 }
2215
2216 if (!blank)
2217 fbcon_add_cursor_timer(info);
2218 else
2219 fbcon_del_cursor_timer(info);
1da177e4 2220
88fb2c6e 2221 return 0;
1da177e4
LT		 2222}
2223
2224static void fbcon_free_font(struct display *p)
2225{
2226 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2227 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2228 p->fontdata = NULL;
2229 p->userfont = 0;
2230}
2231
2232static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2233{
2234 u8 *fontdata = vc->vc_font.data;
2235 u8 *data = font->data;
2236 int i, j;
2237
2238 font->width = vc->vc_font.width;
2239 font->height = vc->vc_font.height;
2240 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2241 if (!font->data)
2242 return 0;
2243
2244 if (font->width <= 8) {
2245 j = vc->vc_font.height;
2246 for (i = 0; i < font->charcount; i++) {
2247 memcpy(data, fontdata, j);
2248 memset(data + j, 0, 32 - j);
2249 data += 32;
2250 fontdata += j;
2251 }
2252 } else if (font->width <= 16) {
2253 j = vc->vc_font.height * 2;
2254 for (i = 0; i < font->charcount; i++) {
2255 memcpy(data, fontdata, j);
2256 memset(data + j, 0, 64 - j);
2257 data += 64;
2258 fontdata += j;
2259 }
2260 } else if (font->width <= 24) {
2261 for (i = 0; i < font->charcount; i++) {
2262 for (j = 0; j < vc->vc_font.height; j++) {
2263 *data++ = fontdata[0];
2264 *data++ = fontdata[1];
2265 *data++ = fontdata[2];
2266 fontdata += sizeof(u32);
2267 }
2268 memset(data, 0, 3 * (32 - j));
2269 data += 3 * (32 - j);
2270 }
2271 } else {
2272 j = vc->vc_font.height * 4;
2273 for (i = 0; i < font->charcount; i++) {
2274 memcpy(data, fontdata, j);
2275 memset(data + j, 0, 128 - j);
2276 data += 128;
2277 fontdata += j;
2278 }
2279 }
2280 return 0;
2281}
2282
2283static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2f4516db 2284 const u8 * data, int userfont)
1da177e4
LT		 2285{
2286 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
e4fc2761 2287 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2288 struct display *p = &fb_display[vc->vc_num];
2289 int resize;
2290 int cnt;
2291 char *old_data = NULL;
2292
2293 if (CON_IS_VISIBLE(vc) && softback_lines)
2294 fbcon_set_origin(vc);
2295
2296 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2297 if (p->userfont)
2298 old_data = vc->vc_font.data;
2299 if (userfont)
2300 cnt = FNTCHARCNT(data);
2301 else
2302 cnt = 256;
2f4516db 2303 vc->vc_font.data = (void *)(p->fontdata = data);
1da177e4
LT		 2304 if ((p->userfont = userfont))
2305 REFCOUNT(data)++;
2306 vc->vc_font.width = w;
2307 vc->vc_font.height = h;
2308 if (vc->vc_hi_font_mask && cnt == 256) {
2309 vc->vc_hi_font_mask = 0;
2310 if (vc->vc_can_do_color) {
2311 vc->vc_complement_mask >>= 1;
2312 vc->vc_s_complement_mask >>= 1;
2313 }
2314
2315 /* ++Edmund: reorder the attribute bits */
2316 if (vc->vc_can_do_color) {
2317 unsigned short *cp =
2318 (unsigned short *) vc->vc_origin;
2319 int count = vc->vc_screenbuf_size / 2;
2320 unsigned short c;
2321 for (; count > 0; count--, cp++) {
2322 c = scr_readw(cp);
2323 scr_writew(((c & 0xfe00) >> 1) |
2324 (c & 0xff), cp);
2325 }
2326 c = vc->vc_video_erase_char;
2327 vc->vc_video_erase_char =
2328 ((c & 0xfe00) >> 1) | (c & 0xff);
2329 vc->vc_attr >>= 1;
2330 }
2331 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2332 vc->vc_hi_font_mask = 0x100;
2333 if (vc->vc_can_do_color) {
2334 vc->vc_complement_mask <<= 1;
2335 vc->vc_s_complement_mask <<= 1;
2336 }
2337
2338 /* ++Edmund: reorder the attribute bits */
2339 {
2340 unsigned short *cp =
2341 (unsigned short *) vc->vc_origin;
2342 int count = vc->vc_screenbuf_size / 2;
2343 unsigned short c;
2344 for (; count > 0; count--, cp++) {
2345 unsigned short newc;
2346 c = scr_readw(cp);
2347 if (vc->vc_can_do_color)
2348 newc =
2349 ((c & 0xff00) << 1) | (c &
2350 0xff);
2351 else
2352 newc = c & ~0x100;
2353 scr_writew(newc, cp);
2354 }
2355 c = vc->vc_video_erase_char;
2356 if (vc->vc_can_do_color) {
2357 vc->vc_video_erase_char =
2358 ((c & 0xff00) << 1) | (c & 0xff);
2359 vc->vc_attr <<= 1;
2360 } else
2361 vc->vc_video_erase_char = c & ~0x100;
2362 }
2363
2364 }
2365
2366 if (resize) {
e4fc2761
AD		 2367 int cols, rows;
2368
2369 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2370 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2371 cols /= w;
2372 rows /= h;
2373 vc_resize(vc, cols, rows);
4d9c5b6e
AD		 2374 if (CON_IS_VISIBLE(vc) && softback_buf)
2375 fbcon_update_softback(vc);
1da177e4
LT		 2376 } else if (CON_IS_VISIBLE(vc)
2377 && vc->vc_mode == KD_TEXT) {
2378 fbcon_clear_margins(vc, 0);
2379 update_screen(vc);
2380 }
2381
2382 if (old_data && (--REFCOUNT(old_data) == 0))
2383 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2384 return 0;
2385}
2386
2387static int fbcon_copy_font(struct vc_data *vc, int con)
2388{
2389 struct display *od = &fb_display[con];
2390 struct console_font *f = &vc->vc_font;
2391
2392 if (od->fontdata == f->data)
2393 return 0; /* already the same font... */
2394 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2395}
2396
2397/*
2398 * User asked to set font; we are guaranteed that
2399 * a) width and height are in range 1..32
2400 * b) charcount does not exceed 512
2401 * but lets not assume that, since someone might someday want to use larger
2402 * fonts. And charcount of 512 is small for unicode support.
2403 *
2404 * However, user space gives the font in 32 rows , regardless of
2405 * actual font height. So a new API is needed if support for larger fonts
2406 * is ever implemented.
2407 */
2408
2409static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2410{
2411 unsigned charcount = font->charcount;
2412 int w = font->width;
2413 int h = font->height;
2414 int size;
2415 int i, csum;
2416 u8 *new_data, *data = font->data;
2417 int pitch = (font->width+7) >> 3;
2418
2419 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2420 * If not this check should be changed to charcount < 256 */
2421 if (charcount != 256 && charcount != 512)
2422 return -EINVAL;
2423
2424 size = h * pitch * charcount;
2425
2426 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2427
2428 if (!new_data)
2429 return -ENOMEM;
2430
2431 new_data += FONT_EXTRA_WORDS * sizeof(int);
2432 FNTSIZE(new_data) = size;
2433 FNTCHARCNT(new_data) = charcount;
2434 REFCOUNT(new_data) = 0; /* usage counter */
2435 for (i=0; i< charcount; i++) {
2436 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2437 }
2438
2439 /* Since linux has a nice crc32 function use it for counting font
2440 * checksums. */
2441 csum = crc32(0, new_data, size);
2442
2443 FNTSUM(new_data) = csum;
2444 /* Check if the same font is on some other console already */
2445 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2446 struct vc_data *tmp = vc_cons[i].d;
2447
2448 if (fb_display[i].userfont &&
2449 fb_display[i].fontdata &&
2450 FNTSUM(fb_display[i].fontdata) == csum &&
2451 FNTSIZE(fb_display[i].fontdata) == size &&
2452 tmp->vc_font.width == w &&
2453 !memcmp(fb_display[i].fontdata, new_data, size)) {
2454 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2f4516db 2455 new_data = (u8 *)fb_display[i].fontdata;
1da177e4
LT		 2456 break;
2457 }
2458 }
2459 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2460}
2461
2462static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2463{
2464 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2f4516db 2465 const struct font_desc *f;
1da177e4
LT		 2466
2467 if (!name)
2468 f = get_default_font(info->var.xres, info->var.yres);
2469 else if (!(f = find_font(name)))
2470 return -ENOENT;
2471
2472 font->width = f->width;
2473 font->height = f->height;
2474 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2475}
2476
2477static u16 palette_red[16];
2478static u16 palette_green[16];
2479static u16 palette_blue[16];
2480
2481static struct fb_cmap palette_cmap = {
2482 0, 16, palette_red, palette_green, palette_blue, NULL
2483};
2484
2485static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2486{
2487 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2488 int i, j, k, depth;
2489 u8 val;
2490
2491 if (fbcon_is_inactive(vc, info))
2492 return -EINVAL;
2493
2494 if (!CON_IS_VISIBLE(vc))
2495 return 0;
2496
b8c90945 2497 depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 2498 if (depth > 3) {
2499 for (i = j = 0; i < 16; i++) {
2500 k = table[i];
2501 val = vc->vc_palette[j++];
2502 palette_red[k] = (val << 8) | val;
2503 val = vc->vc_palette[j++];
2504 palette_green[k] = (val << 8) | val;
2505 val = vc->vc_palette[j++];
2506 palette_blue[k] = (val << 8) | val;
2507 }
2508 palette_cmap.len = 16;
2509 palette_cmap.start = 0;
2510 /*
2511 * If framebuffer is capable of less than 16 colors,
2512 * use default palette of fbcon.
2513 */
2514 } else
2515 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2516
2517 return fb_set_cmap(&palette_cmap, info);
2518}
2519
2520static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2521{
2522 unsigned long p;
2523 int line;
2524
2525 if (vc->vc_num != fg_console || !softback_lines)
2526 return (u16 *) (vc->vc_origin + offset);
2527 line = offset / vc->vc_size_row;
2528 if (line >= softback_lines)
2529 return (u16 *) (vc->vc_origin + offset -
2530 softback_lines * vc->vc_size_row);
2531 p = softback_curr + offset;
2532 if (p >= softback_end)
2533 p += softback_buf - softback_end;
2534 return (u16 *) p;
2535}
2536
2537static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2538 int *px, int *py)
2539{
2540 unsigned long ret;
2541 int x, y;
2542
2543 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2544 unsigned long offset = (pos - vc->vc_origin) / 2;
2545
2546 x = offset % vc->vc_cols;
2547 y = offset / vc->vc_cols;
2548 if (vc->vc_num == fg_console)
2549 y += softback_lines;
2550 ret = pos + (vc->vc_cols - x) * 2;
2551 } else if (vc->vc_num == fg_console && softback_lines) {
2552 unsigned long offset = pos - softback_curr;
2553
2554 if (pos < softback_curr)
2555 offset += softback_end - softback_buf;
2556 offset /= 2;
2557 x = offset % vc->vc_cols;
2558 y = offset / vc->vc_cols;
2559 ret = pos + (vc->vc_cols - x) * 2;
2560 if (ret == softback_end)
2561 ret = softback_buf;
2562 if (ret == softback_in)
2563 ret = vc->vc_origin;
2564 } else {
2565 /* Should not happen */
2566 x = y = 0;
2567 ret = vc->vc_origin;
2568 }
2569 if (px)
2570 *px = x;
2571 if (py)
2572 *py = y;
2573 return ret;
2574}
2575
2576/* As we might be inside of softback, we may work with non-contiguous buffer,
2577 that's why we have to use a separate routine. */
2578static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2579{
2580 while (cnt--) {
2581 u16 a = scr_readw(p);
2582 if (!vc->vc_can_do_color)
2583 a ^= 0x0800;
2584 else if (vc->vc_hi_font_mask == 0x100)
2585 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2586 (((a) & 0x0e00) << 4);
2587 else
2588 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2589 (((a) & 0x0700) << 4);
2590 scr_writew(a, p++);
2591 if (p == (u16 *) softback_end)
2592 p = (u16 *) softback_buf;
2593 if (p == (u16 *) softback_in)
2594 p = (u16 *) vc->vc_origin;
2595 }
2596}
2597
2598static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2599{
2600 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
e4fc2761 2601 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 2602 struct display *p = &fb_display[fg_console];
2603 int offset, limit, scrollback_old;
2604
2605 if (softback_top) {
2606 if (vc->vc_num != fg_console)
2607 return 0;
2608 if (vc->vc_mode != KD_TEXT || !lines)
2609 return 0;
2610 if (logo_shown >= 0) {
2611 struct vc_data *conp2 = vc_cons[logo_shown].d;
2612
2613 if (conp2->vc_top == logo_lines
2614 && conp2->vc_bottom == conp2->vc_rows)
2615 conp2->vc_top = 0;
2616 if (logo_shown == vc->vc_num) {
2617 unsigned long p, q;
2618 int i;
2619
2620 p = softback_in;
2621 q = vc->vc_origin +
2622 logo_lines * vc->vc_size_row;
2623 for (i = 0; i < logo_lines; i++) {
2624 if (p == softback_top)
2625 break;
2626 if (p == softback_buf)
2627 p = softback_end;
2628 p -= vc->vc_size_row;
2629 q -= vc->vc_size_row;
2630 scr_memcpyw((u16 *) q, (u16 *) p,
2631 vc->vc_size_row);
2632 }
2633 softback_in = p;
2634 update_region(vc, vc->vc_origin,
2635 logo_lines * vc->vc_cols);
2636 }
2637 logo_shown = FBCON_LOGO_CANSHOW;
2638 }
2639 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2640 fbcon_redraw_softback(vc, p, lines);
2641 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2642 return 0;
2643 }
2644
2645 if (!scrollback_phys_max)
2646 return -ENOSYS;
2647
2648 scrollback_old = scrollback_current;
2649 scrollback_current -= lines;
2650 if (scrollback_current < 0)
2651 scrollback_current = 0;
2652 else if (scrollback_current > scrollback_max)
2653 scrollback_current = scrollback_max;
2654 if (scrollback_current == scrollback_old)
2655 return 0;
2656
2657 if (fbcon_is_inactive(vc, info))
2658 return 0;
2659
2660 fbcon_cursor(vc, CM_ERASE);
2661
2662 offset = p->yscroll - scrollback_current;
2663 limit = p->vrows;
2664 switch (p->scrollmode) {
2665 case SCROLL_WRAP_MOVE:
2666 info->var.vmode |= FB_VMODE_YWRAP;
2667 break;
2668 case SCROLL_PAN_MOVE:
2669 case SCROLL_PAN_REDRAW:
2670 limit -= vc->vc_rows;
2671 info->var.vmode &= ~FB_VMODE_YWRAP;
2672 break;
2673 }
2674 if (offset < 0)
2675 offset += limit;
2676 else if (offset >= limit)
2677 offset -= limit;
e4fc2761
AD		 2678
2679 ops->var.xoffset = 0;
2680 ops->var.yoffset = offset * vc->vc_font.height;
2681 ops->update_start(info);
2682
1da177e4
LT		 2683 if (!scrollback_current)
2684 fbcon_cursor(vc, CM_DRAW);
2685 return 0;
2686}
2687
2688static int fbcon_set_origin(struct vc_data *vc)
2689{
2690 if (softback_lines)
2691 fbcon_scrolldelta(vc, softback_lines);
2692 return 0;
2693}
2694
2695static void fbcon_suspended(struct fb_info *info)
2696{
2697 struct vc_data *vc = NULL;
2698 struct fbcon_ops *ops = info->fbcon_par;
2699
2700 if (!ops || ops->currcon < 0)
2701 return;
2702 vc = vc_cons[ops->currcon].d;
2703
2704 /* Clear cursor, restore saved data */
2705 fbcon_cursor(vc, CM_ERASE);
2706}
2707
2708static void fbcon_resumed(struct fb_info *info)
2709{
2710 struct vc_data *vc;
2711 struct fbcon_ops *ops = info->fbcon_par;
2712
2713 if (!ops || ops->currcon < 0)
2714 return;
2715 vc = vc_cons[ops->currcon].d;
2716
2717 update_screen(vc);
2718}
2719
2720static void fbcon_modechanged(struct fb_info *info)
2721{
2722 struct fbcon_ops *ops = info->fbcon_par;
2723 struct vc_data *vc;
2724 struct display *p;
2725 int rows, cols;
2726
2727 if (!ops || ops->currcon < 0)
2728 return;
2729 vc = vc_cons[ops->currcon].d;
e4fc2761
AD		 2730 if (vc->vc_mode != KD_TEXT ||
2731 registered_fb[con2fb_map[ops->currcon]] != info)
1da177e4
LT		 2732 return;
2733
2734 p = &fb_display[vc->vc_num];
b73deed3 2735 set_blitting_type(vc, info);
1da177e4
LT		 2736
2737 if (CON_IS_VISIBLE(vc)) {
2738 var_to_display(p, &info->var, info);
e4fc2761
AD		 2739 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2740 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2741 cols /= vc->vc_font.width;
2742 rows /= vc->vc_font.height;
1da177e4
LT		 2743 vc_resize(vc, cols, rows);
2744 updatescrollmode(p, info, vc);
2745 scrollback_max = 0;
2746 scrollback_current = 0;
4e1567d3
AD		 2747
2748 if (!fbcon_is_inactive(vc, info)) {
2749 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2750 ops->update_start(info);
2751 }
2752
1da177e4
LT		 2753 fbcon_set_palette(vc, color_table);
2754 update_screen(vc);
4d9c5b6e
AD		 2755 if (softback_buf)
2756 fbcon_update_softback(vc);
1da177e4
LT		 2757 }
2758}
2759
7726e9e1
AD		 2760static void fbcon_set_all_vcs(struct fb_info *info)
2761{
2762 struct fbcon_ops *ops = info->fbcon_par;
2763 struct vc_data *vc;
2764 struct display *p;
2765 int i, rows, cols;
2766
2767 if (!ops || ops->currcon < 0)
2768 return;
2769
2770 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2771 vc = vc_cons[i].d;
2772 if (!vc || vc->vc_mode != KD_TEXT ||
2773 registered_fb[con2fb_map[i]] != info)
2774 continue;
2775
2776 p = &fb_display[vc->vc_num];
b73deed3 2777 set_blitting_type(vc, info);
7726e9e1 2778 var_to_display(p, &info->var, info);
e4fc2761
AD		 2779 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2780 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2781 cols /= vc->vc_font.width;
2782 rows /= vc->vc_font.height;
7726e9e1
AD		 2783 vc_resize(vc, cols, rows);
2784
2785 if (CON_IS_VISIBLE(vc)) {
2786 updatescrollmode(p, info, vc);
2787 scrollback_max = 0;
2788 scrollback_current = 0;
4e1567d3
AD		 2789
2790 if (!fbcon_is_inactive(vc, info)) {
2791 ops->var.xoffset = ops->var.yoffset =
2792 p->yscroll = 0;
2793 ops->update_start(info);
2794 }
2795
7726e9e1
AD		 2796 fbcon_set_palette(vc, color_table);
2797 update_screen(vc);
4d9c5b6e
AD		 2798 if (softback_buf)
2799 fbcon_update_softback(vc);
7726e9e1
AD		 2800 }
2801 }
04a2fe57
AD		 2802
2803 ops->p = &fb_display[ops->currcon];
7726e9e1
AD		 2804}
2805
1da177e4
LT		 2806static int fbcon_mode_deleted(struct fb_info *info,
2807 struct fb_videomode *mode)
2808{
2809 struct fb_info *fb_info;
2810 struct display *p;
2811 int i, j, found = 0;
2812
2813 /* before deletion, ensure that mode is not in use */
2814 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2815 j = con2fb_map[i];
2816 if (j == -1)
2817 continue;
2818 fb_info = registered_fb[j];
2819 if (fb_info != info)
2820 continue;
2821 p = &fb_display[i];
2822 if (!p || !p->mode)
2823 continue;
2824 if (fb_mode_is_equal(p->mode, mode)) {
2825 found = 1;
2826 break;
2827 }
2828 }
2829 return found;
2830}
2831
2832static int fbcon_fb_registered(int idx)
2833{
2834 int ret = 0, i;
2835
2836 if (info_idx == -1) {
2837 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2838 if (con2fb_map_boot[i] == idx) {
2839 info_idx = idx;
2840 break;
2841 }
2842 }
2843 if (info_idx != -1)
2844 ret = fbcon_takeover(1);
2845 } else {
2846 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2847 if (con2fb_map_boot[i] == idx)
2848 set_con2fb_map(i, idx, 0);
2849 }
2850 }
2851
2852 return ret;
2853}
2854
2855static void fbcon_fb_blanked(struct fb_info *info, int blank)
2856{
2857 struct fbcon_ops *ops = info->fbcon_par;
2858 struct vc_data *vc;
2859
2860 if (!ops || ops->currcon < 0)
2861 return;
2862
2863 vc = vc_cons[ops->currcon].d;
2864 if (vc->vc_mode != KD_TEXT ||
2865 registered_fb[con2fb_map[ops->currcon]] != info)
2866 return;
2867
2868 if (CON_IS_VISIBLE(vc)) {
2869 if (blank)
2870 do_blank_screen(0);
2871 else
2872 do_unblank_screen(0);
2873 }
2874 ops->blank_state = blank;
2875}
2876
2877static void fbcon_new_modelist(struct fb_info *info)
2878{
2879 int i;
2880 struct vc_data *vc;
2881 struct fb_var_screeninfo var;
2882 struct fb_videomode *mode;
2883
2884 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2885 if (registered_fb[con2fb_map[i]] != info)
2886 continue;
2887 if (!fb_display[i].mode)
2888 continue;
2889 vc = vc_cons[i].d;
2890 display_to_var(&var, &fb_display[i]);
8fb6567e
MJ		 2891 mode = fb_find_nearest_mode(fb_display[i].mode,
2892 &info->modelist);
1da177e4
LT		 2893 fb_videomode_to_var(&var, mode);
2894
2895 if (vc)
2896 fbcon_set_disp(info, &var, vc);
2897 else
2898 fbcon_preset_disp(info, &var, i);
2899
2900 }
2901}
2902
2903static int fbcon_event_notify(struct notifier_block *self,
2904 unsigned long action, void *data)
2905{
2906 struct fb_event *event = data;
2907 struct fb_info *info = event->info;
2908 struct fb_videomode *mode;
2909 struct fb_con2fbmap *con2fb;
2910 int ret = 0;
2911
2912 switch(action) {
2913 case FB_EVENT_SUSPEND:
2914 fbcon_suspended(info);
2915 break;
2916 case FB_EVENT_RESUME:
2917 fbcon_resumed(info);
2918 break;
2919 case FB_EVENT_MODE_CHANGE:
2920 fbcon_modechanged(info);
2921 break;
7726e9e1
AD		 2922 case FB_EVENT_MODE_CHANGE_ALL:
2923 fbcon_set_all_vcs(info);
2924 break;
1da177e4
LT		 2925 case FB_EVENT_MODE_DELETE:
2926 mode = event->data;
2927 ret = fbcon_mode_deleted(info, mode);
2928 break;
2929 case FB_EVENT_FB_REGISTERED:
2930 ret = fbcon_fb_registered(info->node);
2931 break;
2932 case FB_EVENT_SET_CONSOLE_MAP:
2933 con2fb = event->data;
2934 ret = set_con2fb_map(con2fb->console - 1,
2935 con2fb->framebuffer, 1);
2936 break;
2937 case FB_EVENT_GET_CONSOLE_MAP:
2938 con2fb = event->data;
2939 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2940 break;
2941 case FB_EVENT_BLANK:
2942 fbcon_fb_blanked(info, *(int *)event->data);
2943 break;
2944 case FB_EVENT_NEW_MODELIST:
2945 fbcon_new_modelist(info);
2946 break;
a812c94b
AD		 2947 case FB_EVENT_SET_CON_ROTATE:
2948 fbcon_rotate(info, *(int *)event->data);
2949 break;
2950 case FB_EVENT_GET_CON_ROTATE:
2951 ret = fbcon_get_rotate(info);
2952 break;
2953 case FB_EVENT_SET_CON_ROTATE_ALL:
2954 fbcon_rotate_all(info, *(int *)event->data);
1da177e4
LT		 2955 }
2956
2957 return ret;
2958}
2959
2960/*
2961 * The console `switch' structure for the frame buffer based console
2962 */
2963
2964static const struct consw fb_con = {
2965 .owner = THIS_MODULE,
2966 .con_startup = fbcon_startup,
2967 .con_init = fbcon_init,
2968 .con_deinit = fbcon_deinit,
2969 .con_clear = fbcon_clear,
2970 .con_putc = fbcon_putc,
2971 .con_putcs = fbcon_putcs,
2972 .con_cursor = fbcon_cursor,
2973 .con_scroll = fbcon_scroll,
2974 .con_bmove = fbcon_bmove,
2975 .con_switch = fbcon_switch,
2976 .con_blank = fbcon_blank,
2977 .con_font_set = fbcon_set_font,
2978 .con_font_get = fbcon_get_font,
2979 .con_font_default = fbcon_set_def_font,
2980 .con_font_copy = fbcon_copy_font,
2981 .con_set_palette = fbcon_set_palette,
2982 .con_scrolldelta = fbcon_scrolldelta,
2983 .con_set_origin = fbcon_set_origin,
2984 .con_invert_region = fbcon_invert_region,
2985 .con_screen_pos = fbcon_screen_pos,
2986 .con_getxy = fbcon_getxy,
2987 .con_resize = fbcon_resize,
2988};
2989
2990static struct notifier_block fbcon_event_notifier = {
2991 .notifier_call = fbcon_event_notify,
2992};
2993
2994static int __init fb_console_init(void)
2995{
2996 int i;
2997
2998 acquire_console_sem();
2999 fb_register_client(&fbcon_event_notifier);
3000 release_console_sem();
3001
3002 for (i = 0; i < MAX_NR_CONSOLES; i++)
3003 con2fb_map[i] = -1;
3004
3005 if (num_registered_fb) {
3006 for (i = 0; i < FB_MAX; i++) {
3007 if (registered_fb[i] != NULL) {
3008 info_idx = i;
3009 break;
3010 }
3011 }
3012 fbcon_takeover(0);
3013 }
3014
3015 return 0;
3016}
3017
3018module_init(fb_console_init);
3019
3020#ifdef MODULE
3021
3022static void __exit fb_console_exit(void)
3023{
3024 acquire_console_sem();
3025 fb_unregister_client(&fbcon_event_notifier);
3026 release_console_sem();
3027 give_up_console(&fb_con);
3028}
3029
3030module_exit(fb_console_exit);
3031
3032#endif
3033
3034MODULE_LICENSE("GPL");
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