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kbuild: document howto build external modules using several directories
[linux-2.6/verdex.git] / drivers / video / console / fbcon.c
blob3660e51b2612996a80963137777db21b4e9f65a0
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
103 enum {
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
109 static struct display fb_display[MAX_NR_CONSOLES];
110
111 static signed char con2fb_map[MAX_NR_CONSOLES];
112 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
113 static int logo_height;
114 static int logo_lines;
115 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
116 enums. */
117 static int logo_shown = FBCON_LOGO_CANSHOW;
118 /* Software scrollback */
119 static int fbcon_softback_size = 32768;
120 static unsigned long softback_buf, softback_curr;
121 static unsigned long softback_in;
122 static unsigned long softback_top, softback_end;
123 static int softback_lines;
124 /* console mappings */
125 static int first_fb_vc;
126 static int last_fb_vc = MAX_NR_CONSOLES - 1;
127 static int fbcon_is_default = 1;
128 /* font data */
129 static char fontname[40];
130
131 /* current fb_info */
132 static int info_idx = -1;
133
134 /* console rotation */
135 static int rotate;
136
137 static 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
143 static void fbcon_free_font(struct display *);
144 static int fbcon_set_origin(struct vc_data *);
145
146 #define CURSOR_DRAW_DELAY (1)
147
148 /* # VBL ints between cursor state changes */
149 #define ATARI_CURSOR_BLINK_RATE (42)
150 #define MAC_CURSOR_BLINK_RATE (32)
151 #define DEFAULT_CURSOR_BLINK_RATE (20)
152
153 static 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
161 static const char *fbcon_startup(void);
162 static void fbcon_init(struct vc_data *vc, int init);
163 static void fbcon_deinit(struct vc_data *vc);
164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
165 int width);
166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
168 int count, int ypos, int xpos);
169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
170 static void fbcon_cursor(struct vc_data *vc, int mode);
171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
172 int count);
173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
174 int height, int width);
175 static int fbcon_switch(struct vc_data *vc);
176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
179
180 /*
181 * Internal routines
182 */
183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
185 static __inline__ void ypan_up(struct vc_data *vc, int count);
186 static __inline__ void ypan_down(struct vc_data *vc, int count);
187 static 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);
189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 struct vc_data *vc);
191 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 int unit);
193 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
194 int line, int count, int dy);
195 static void fbcon_modechanged(struct fb_info *info);
196 static void fbcon_set_all_vcs(struct fb_info *info);
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 */
202 static int vbl_detected;
203
204 static 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
211 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
212 static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
213 {
214 struct fbcon_ops *ops = info->fbcon_par;
215
216 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
217 p->con_rotate < 4)
218 ops->rotate = p->con_rotate;
219 else
220 ops->rotate = 0;
221 }
222
223 static 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
245 static 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 }
267 #else
268 static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
269 {
270 struct fbcon_ops *ops = info->fbcon_par;
271
272 ops->rotate = FB_ROTATE_UR;
273 }
274
275 static void fbcon_rotate(struct fb_info *info, u32 rotate)
276 {
277 return;
278 }
279
280 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
281 {
282 return;
283 }
284 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
285
286 static 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
293 static 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
301 static inline int get_color(struct vc_data *vc, struct fb_info *info,
302 u16 c, int is_fg)
303 {
304 int depth = fb_get_color_depth(&info->var, &info->fix);
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 {
320 int col = ~(0xfff << (max(info->var.green.length,
321 max(info->var.red.length,
322 info->var.blue.length)))) & 0xff;
323
324 /* 0 or 1 */
325 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
326 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
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
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.
341 */
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;
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
371 static 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
383 static 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) ||
397 registered_fb[con2fb_map[vc->vc_num]] != info ||
398 vc_cons[ops->currcon].d->vc_deccm != 1)
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;
405 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
406 get_color(vc, info, c, 0));
407 release_console_sem();
408 }
409
410 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
411 static int cursor_blink_rate;
412 static 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
424 static 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
433 static 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
451 static 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
462 #ifndef MODULE
463 static int __init fb_console_setup(char *this_opt)
464 {
465 char *options;
466 int i, j;
467
468 if (!this_opt || !*this_opt)
469 return 0;
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 != ',')
484 return 0;
485 options++;
486 } else
487 return 0;
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 }
499 return 0;
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 }
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 }
520 }
521 return 0;
522 }
523
524 __setup("fbcon=", fb_console_setup);
525 #endif
526
527 static 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
538 static 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
549 static 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
574 static 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 */
578 struct fbcon_ops *ops = info->fbcon_par;
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 */
586 if (fb_get_color_depth(&info->var, &info->fix) == 1)
587 erase &= ~0x400;
588 logo_height = fb_prepare_logo(info, ops->rotate);
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
650 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
651 struct display *p)
652 {
653 struct fbcon_ops *ops = info->fbcon_par;
654
655 ops->p = (p) ? p : &fb_display[vc->vc_num];
656
657 if ((info->flags & FBINFO_MISC_TILEBLITTING))
658 fbcon_set_tileops(vc, info, p, ops);
659 else {
660 fbcon_set_rotation(info, ops->p);
661 fbcon_set_bitops(ops);
662 }
663 }
664 #else
665 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
666 struct display *p)
667 {
668 struct fbcon_ops *ops = info->fbcon_par;
669
670 info->flags &= ~FBINFO_MISC_TILEBLITTING;
671 ops->p = (p) ? p : &fb_display[vc->vc_num];
672 fbcon_set_rotation(info, ops->p);
673 fbcon_set_bitops(ops);
674 }
675 #endif /* CONFIG_MISC_TILEBLITTING */
676
677
678 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
679 int unit, int oldidx)
680 {
681 struct fbcon_ops *ops = NULL;
682 int err = 0;
683
684 if (!try_module_get(info->fbops->owner))
685 err = -ENODEV;
686
687 if (!err && info->fbops->fb_open &&
688 info->fbops->fb_open(info, 0))
689 err = -ENODEV;
690
691 if (!err) {
692 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
693 if (!ops)
694 err = -ENOMEM;
695 }
696
697 if (!err) {
698 memset(ops, 0, sizeof(struct fbcon_ops));
699 info->fbcon_par = ops;
700 set_blitting_type(vc, info, NULL);
701 }
702
703 if (err) {
704 con2fb_map[unit] = oldidx;
705 module_put(info->fbops->owner);
706 }
707
708 return err;
709 }
710
711 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
712 struct fb_info *newinfo, int unit,
713 int oldidx, int found)
714 {
715 struct fbcon_ops *ops = oldinfo->fbcon_par;
716 int err = 0;
717
718 if (oldinfo->fbops->fb_release &&
719 oldinfo->fbops->fb_release(oldinfo, 0)) {
720 con2fb_map[unit] = oldidx;
721 if (!found && newinfo->fbops->fb_release)
722 newinfo->fbops->fb_release(newinfo, 0);
723 if (!found)
724 module_put(newinfo->fbops->owner);
725 err = -ENODEV;
726 }
727
728 if (!err) {
729 fbcon_del_cursor_timer(oldinfo);
730 kfree(ops->cursor_state.mask);
731 kfree(ops->cursor_data);
732 kfree(ops->fontbuffer);
733 kfree(oldinfo->fbcon_par);
734 oldinfo->fbcon_par = NULL;
735 module_put(oldinfo->fbops->owner);
736 /*
737 If oldinfo and newinfo are driving the same hardware,
738 the fb_release() method of oldinfo may attempt to
739 restore the hardware state. This will leave the
740 newinfo in an undefined state. Thus, a call to
741 fb_set_par() may be needed for the newinfo.
742 */
743 if (newinfo->fbops->fb_set_par)
744 newinfo->fbops->fb_set_par(newinfo);
745 }
746
747 return err;
748 }
749
750 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
751 int unit, int show_logo)
752 {
753 struct fbcon_ops *ops = info->fbcon_par;
754
755 ops->currcon = fg_console;
756
757 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
758 info->fbops->fb_set_par(info);
759
760 ops->flags |= FBCON_FLAGS_INIT;
761 ops->graphics = 0;
762
763 if (vc)
764 fbcon_set_disp(info, &info->var, vc);
765 else
766 fbcon_preset_disp(info, &info->var, unit);
767
768 if (show_logo) {
769 struct vc_data *fg_vc = vc_cons[fg_console].d;
770 struct fb_info *fg_info =
771 registered_fb[con2fb_map[fg_console]];
772
773 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
774 fg_vc->vc_rows, fg_vc->vc_cols,
775 fg_vc->vc_rows);
776 }
777
778 update_screen(vc_cons[fg_console].d);
779 }
780
781 /**
782 * set_con2fb_map - map console to frame buffer device
783 * @unit: virtual console number to map
784 * @newidx: frame buffer index to map virtual console to
785 * @user: user request
786 *
787 * Maps a virtual console @unit to a frame buffer device
788 * @newidx.
789 */
790 static int set_con2fb_map(int unit, int newidx, int user)
791 {
792 struct vc_data *vc = vc_cons[unit].d;
793 int oldidx = con2fb_map[unit];
794 struct fb_info *info = registered_fb[newidx];
795 struct fb_info *oldinfo = NULL;
796 int found, err = 0;
797
798 if (oldidx == newidx)
799 return 0;
800
801 if (!info)
802 err = -EINVAL;
803
804 if (!err && !search_for_mapped_con()) {
805 info_idx = newidx;
806 return fbcon_takeover(0);
807 }
808
809 if (oldidx != -1)
810 oldinfo = registered_fb[oldidx];
811
812 found = search_fb_in_map(newidx);
813
814 acquire_console_sem();
815 con2fb_map[unit] = newidx;
816 if (!err && !found)
817 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
818
819
820 /*
821 * If old fb is not mapped to any of the consoles,
822 * fbcon should release it.
823 */
824 if (!err && oldinfo && !search_fb_in_map(oldidx))
825 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
826 found);
827
828 if (!err) {
829 int show_logo = (fg_console == 0 && !user &&
830 logo_shown != FBCON_LOGO_DONTSHOW);
831
832 if (!found)
833 fbcon_add_cursor_timer(info);
834 con2fb_map_boot[unit] = newidx;
835 con2fb_init_display(vc, info, unit, show_logo);
836 }
837
838 release_console_sem();
839 return err;
840 }
841
842 /*
843 * Low Level Operations
844 */
845 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
846 static int var_to_display(struct display *disp,
847 struct fb_var_screeninfo *var,
848 struct fb_info *info)
849 {
850 disp->xres_virtual = var->xres_virtual;
851 disp->yres_virtual = var->yres_virtual;
852 disp->bits_per_pixel = var->bits_per_pixel;
853 disp->grayscale = var->grayscale;
854 disp->nonstd = var->nonstd;
855 disp->accel_flags = var->accel_flags;
856 disp->height = var->height;
857 disp->width = var->width;
858 disp->red = var->red;
859 disp->green = var->green;
860 disp->blue = var->blue;
861 disp->transp = var->transp;
862 disp->rotate = var->rotate;
863 disp->mode = fb_match_mode(var, &info->modelist);
864 if (disp->mode == NULL)
865 /* This should not happen */
866 return -EINVAL;
867 return 0;
868 }
869
870 static void display_to_var(struct fb_var_screeninfo *var,
871 struct display *disp)
872 {
873 fb_videomode_to_var(var, disp->mode);
874 var->xres_virtual = disp->xres_virtual;
875 var->yres_virtual = disp->yres_virtual;
876 var->bits_per_pixel = disp->bits_per_pixel;
877 var->grayscale = disp->grayscale;
878 var->nonstd = disp->nonstd;
879 var->accel_flags = disp->accel_flags;
880 var->height = disp->height;
881 var->width = disp->width;
882 var->red = disp->red;
883 var->green = disp->green;
884 var->blue = disp->blue;
885 var->transp = disp->transp;
886 var->rotate = disp->rotate;
887 }
888
889 static const char *fbcon_startup(void)
890 {
891 const char *display_desc = "frame buffer device";
892 struct display *p = &fb_display[fg_console];
893 struct vc_data *vc = vc_cons[fg_console].d;
894 const struct font_desc *font = NULL;
895 struct module *owner;
896 struct fb_info *info = NULL;
897 struct fbcon_ops *ops;
898 int rows, cols;
899 int irqres;
900
901 irqres = 1;
902 /*
903 * If num_registered_fb is zero, this is a call for the dummy part.
904 * The frame buffer devices weren't initialized yet.
905 */
906 if (!num_registered_fb || info_idx == -1)
907 return display_desc;
908 /*
909 * Instead of blindly using registered_fb[0], we use info_idx, set by
910 * fb_console_init();
911 */
912 info = registered_fb[info_idx];
913 if (!info)
914 return NULL;
915
916 owner = info->fbops->owner;
917 if (!try_module_get(owner))
918 return NULL;
919 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
920 module_put(owner);
921 return NULL;
922 }
923
924 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
925 if (!ops) {
926 module_put(owner);
927 return NULL;
928 }
929
930 memset(ops, 0, sizeof(struct fbcon_ops));
931 ops->currcon = -1;
932 ops->graphics = 1;
933 ops->cur_rotate = -1;
934 info->fbcon_par = ops;
935 p->con_rotate = rotate;
936 set_blitting_type(vc, info, NULL);
937
938 if (info->fix.type != FB_TYPE_TEXT) {
939 if (fbcon_softback_size) {
940 if (!softback_buf) {
941 softback_buf =
942 (unsigned long)
943 kmalloc(fbcon_softback_size,
944 GFP_KERNEL);
945 if (!softback_buf) {
946 fbcon_softback_size = 0;
947 softback_top = 0;
948 }
949 }
950 } else {
951 if (softback_buf) {
952 kfree((void *) softback_buf);
953 softback_buf = 0;
954 softback_top = 0;
955 }
956 }
957 if (softback_buf)
958 softback_in = softback_top = softback_curr =
959 softback_buf;
960 softback_lines = 0;
961 }
962
963 /* Setup default font */
964 if (!p->fontdata) {
965 if (!fontname[0] || !(font = find_font(fontname)))
966 font = get_default_font(info->var.xres,
967 info->var.yres);
968 vc->vc_font.width = font->width;
969 vc->vc_font.height = font->height;
970 vc->vc_font.data = (void *)(p->fontdata = font->data);
971 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
972 }
973
974 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
975 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
976 cols /= vc->vc_font.width;
977 rows /= vc->vc_font.height;
978 vc_resize(vc, cols, rows);
979
980 DPRINTK("mode: %s\n", info->fix.id);
981 DPRINTK("visual: %d\n", info->fix.visual);
982 DPRINTK("res: %dx%d-%d\n", info->var.xres,
983 info->var.yres,
984 info->var.bits_per_pixel);
985
986 #ifdef CONFIG_ATARI
987 if (MACH_IS_ATARI) {
988 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
989 irqres =
990 request_irq(IRQ_AUTO_4, fb_vbl_handler,
991 IRQ_TYPE_PRIO, "framebuffer vbl",
992 info);
993 }
994 #endif /* CONFIG_ATARI */
995
996 #ifdef CONFIG_MAC
997 /*
998 * On a Macintoy, the VBL interrupt may or may not be active.
999 * As interrupt based cursor is more reliable and race free, we
1000 * probe for VBL interrupts.
1001 */
1002 if (MACH_IS_MAC) {
1003 int ct = 0;
1004 /*
1005 * Probe for VBL: set temp. handler ...
1006 */
1007 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1008 "framebuffer vbl", info);
1009 vbl_detected = 0;
1010
1011 /*
1012 * ... and spin for 20 ms ...
1013 */
1014 while (!vbl_detected && ++ct < 1000)
1015 udelay(20);
1016
1017 if (ct == 1000)
1018 printk
1019 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1020
1021 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1022
1023 if (vbl_detected) {
1024 /*
1025 * interrupt based cursor ok
1026 */
1027 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1028 irqres =
1029 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1030 "framebuffer vbl", info);
1031 } else {
1032 /*
1033 * VBL not detected: fall through, use timer based cursor
1034 */
1035 irqres = 1;
1036 }
1037 }
1038 #endif /* CONFIG_MAC */
1039
1040 fbcon_add_cursor_timer(info);
1041 return display_desc;
1042 }
1043
1044 static void fbcon_init(struct vc_data *vc, int init)
1045 {
1046 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1047 struct fbcon_ops *ops;
1048 struct vc_data **default_mode = vc->vc_display_fg;
1049 struct vc_data *svc = *default_mode;
1050 struct display *t, *p = &fb_display[vc->vc_num];
1051 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1052 int cap;
1053
1054 if (info_idx == -1 || info == NULL)
1055 return;
1056
1057 cap = info->flags;
1058
1059 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1060 (info->fix.type == FB_TYPE_TEXT))
1061 logo = 0;
1062
1063 if (var_to_display(p, &info->var, info))
1064 return;
1065
1066 /* If we are not the first console on this
1067 fb, copy the font from that console */
1068 t = &fb_display[svc->vc_num];
1069 if (!vc->vc_font.data) {
1070 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1071 vc->vc_font.width = (*default_mode)->vc_font.width;
1072 vc->vc_font.height = (*default_mode)->vc_font.height;
1073 p->userfont = t->userfont;
1074 if (p->userfont)
1075 REFCOUNT(p->fontdata)++;
1076 }
1077 if (p->userfont)
1078 charcnt = FNTCHARCNT(p->fontdata);
1079 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1080 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1081 if (charcnt == 256) {
1082 vc->vc_hi_font_mask = 0;
1083 } else {
1084 vc->vc_hi_font_mask = 0x100;
1085 if (vc->vc_can_do_color)
1086 vc->vc_complement_mask <<= 1;
1087 }
1088
1089 if (!*svc->vc_uni_pagedir_loc)
1090 con_set_default_unimap(svc);
1091 if (!*vc->vc_uni_pagedir_loc)
1092 con_copy_unimap(vc, svc);
1093
1094 ops = info->fbcon_par;
1095 p->con_rotate = rotate;
1096 set_blitting_type(vc, info, NULL);
1097
1098 cols = vc->vc_cols;
1099 rows = vc->vc_rows;
1100 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1101 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1102 new_cols /= vc->vc_font.width;
1103 new_rows /= vc->vc_font.height;
1104 vc_resize(vc, new_cols, new_rows);
1105
1106 /*
1107 * We must always set the mode. The mode of the previous console
1108 * driver could be in the same resolution but we are using different
1109 * hardware so we have to initialize the hardware.
1110 *
1111 * We need to do it in fbcon_init() to prevent screen corruption.
1112 */
1113 if (CON_IS_VISIBLE(vc)) {
1114 if (info->fbops->fb_set_par &&
1115 !(ops->flags & FBCON_FLAGS_INIT))
1116 info->fbops->fb_set_par(info);
1117 ops->flags |= FBCON_FLAGS_INIT;
1118 }
1119
1120 ops->graphics = 0;
1121
1122 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1123 !(cap & FBINFO_HWACCEL_DISABLED))
1124 p->scrollmode = SCROLL_MOVE;
1125 else /* default to something safe */
1126 p->scrollmode = SCROLL_REDRAW;
1127
1128 /*
1129 * ++guenther: console.c:vc_allocate() relies on initializing
1130 * vc_{cols,rows}, but we must not set those if we are only
1131 * resizing the console.
1132 */
1133 if (!init) {
1134 vc->vc_cols = new_cols;
1135 vc->vc_rows = new_rows;
1136 }
1137
1138 if (logo)
1139 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1140
1141 if (vc == svc && softback_buf)
1142 fbcon_update_softback(vc);
1143
1144 if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
1145 ops->rotate = FB_ROTATE_UR;
1146 set_blitting_type(vc, info, p);
1147 }
1148
1149 }
1150
1151 static void fbcon_deinit(struct vc_data *vc)
1152 {
1153 struct display *p = &fb_display[vc->vc_num];
1154
1155 if (info_idx != -1)
1156 return;
1157 fbcon_free_font(p);
1158 }
1159
1160 /* ====================================================================== */
1161
1162 /* fbcon_XXX routines - interface used by the world
1163 *
1164 * This system is now divided into two levels because of complications
1165 * caused by hardware scrolling. Top level functions:
1166 *
1167 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1168 *
1169 * handles y values in range [0, scr_height-1] that correspond to real
1170 * screen positions. y_wrap shift means that first line of bitmap may be
1171 * anywhere on this display. These functions convert lineoffsets to
1172 * bitmap offsets and deal with the wrap-around case by splitting blits.
1173 *
1174 * fbcon_bmove_physical_8() -- These functions fast implementations
1175 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1176 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1177 *
1178 * WARNING:
1179 *
1180 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1181 * Implies should only really hardware scroll in rows. Only reason for
1182 * restriction is simplicity & efficiency at the moment.
1183 */
1184
1185 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1186 int width)
1187 {
1188 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1189 struct fbcon_ops *ops = info->fbcon_par;
1190
1191 struct display *p = &fb_display[vc->vc_num];
1192 u_int y_break;
1193
1194 if (fbcon_is_inactive(vc, info))
1195 return;
1196
1197 if (!height || !width)
1198 return;
1199
1200 /* Split blits that cross physical y_wrap boundary */
1201
1202 y_break = p->vrows - p->yscroll;
1203 if (sy < y_break && sy + height - 1 >= y_break) {
1204 u_int b = y_break - sy;
1205 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1206 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1207 width);
1208 } else
1209 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1210 }
1211
1212 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1213 int count, int ypos, int xpos)
1214 {
1215 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1216 struct display *p = &fb_display[vc->vc_num];
1217 struct fbcon_ops *ops = info->fbcon_par;
1218
1219 if (!fbcon_is_inactive(vc, info))
1220 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1221 get_color(vc, info, scr_readw(s), 1),
1222 get_color(vc, info, scr_readw(s), 0));
1223 }
1224
1225 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1226 {
1227 unsigned short chr;
1228
1229 scr_writew(c, &chr);
1230 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1231 }
1232
1233 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1234 {
1235 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1236 struct fbcon_ops *ops = info->fbcon_par;
1237
1238 if (!fbcon_is_inactive(vc, info))
1239 ops->clear_margins(vc, info, bottom_only);
1240 }
1241
1242 static void fbcon_cursor(struct vc_data *vc, int mode)
1243 {
1244 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1245 struct fbcon_ops *ops = info->fbcon_par;
1246 struct display *p = &fb_display[vc->vc_num];
1247 int y;
1248 int c = scr_readw((u16 *) vc->vc_pos);
1249
1250 if (fbcon_is_inactive(vc, info))
1251 return;
1252
1253 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1254 if (mode & CM_SOFTBACK) {
1255 mode &= ~CM_SOFTBACK;
1256 y = softback_lines;
1257 } else {
1258 if (softback_lines)
1259 fbcon_set_origin(vc);
1260 y = 0;
1261 }
1262
1263 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1264 get_color(vc, info, c, 0));
1265 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1266 }
1267
1268 static int scrollback_phys_max = 0;
1269 static int scrollback_max = 0;
1270 static int scrollback_current = 0;
1271
1272 /*
1273 * If no vc is existent yet, just set struct display
1274 */
1275 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1276 int unit)
1277 {
1278 struct display *p = &fb_display[unit];
1279 struct display *t = &fb_display[fg_console];
1280
1281 if (var_to_display(p, var, info))
1282 return;
1283
1284 p->fontdata = t->fontdata;
1285 p->userfont = t->userfont;
1286 if (p->userfont)
1287 REFCOUNT(p->fontdata)++;
1288 }
1289
1290 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1291 struct vc_data *vc)
1292 {
1293 struct display *p = &fb_display[vc->vc_num], *t;
1294 struct vc_data **default_mode = vc->vc_display_fg;
1295 struct vc_data *svc = *default_mode;
1296 struct fbcon_ops *ops = info->fbcon_par;
1297 int rows, cols, charcnt = 256;
1298
1299 if (var_to_display(p, var, info))
1300 return;
1301 t = &fb_display[svc->vc_num];
1302 if (!vc->vc_font.data) {
1303 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1304 vc->vc_font.width = (*default_mode)->vc_font.width;
1305 vc->vc_font.height = (*default_mode)->vc_font.height;
1306 p->userfont = t->userfont;
1307 if (p->userfont)
1308 REFCOUNT(p->fontdata)++;
1309 }
1310 if (p->userfont)
1311 charcnt = FNTCHARCNT(p->fontdata);
1312
1313 var->activate = FB_ACTIVATE_NOW;
1314 info->var.activate = var->activate;
1315 var->yoffset = info->var.yoffset;
1316 var->xoffset = info->var.xoffset;
1317 fb_set_var(info, var);
1318 ops->var = info->var;
1319 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1320 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1321 if (charcnt == 256) {
1322 vc->vc_hi_font_mask = 0;
1323 } else {
1324 vc->vc_hi_font_mask = 0x100;
1325 if (vc->vc_can_do_color)
1326 vc->vc_complement_mask <<= 1;
1327 }
1328
1329 if (!*svc->vc_uni_pagedir_loc)
1330 con_set_default_unimap(svc);
1331 if (!*vc->vc_uni_pagedir_loc)
1332 con_copy_unimap(vc, svc);
1333
1334 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1335 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1336 cols /= vc->vc_font.width;
1337 rows /= vc->vc_font.height;
1338 vc_resize(vc, cols, rows);
1339
1340 if (CON_IS_VISIBLE(vc)) {
1341 update_screen(vc);
1342 if (softback_buf)
1343 fbcon_update_softback(vc);
1344 }
1345 }
1346
1347 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1348 {
1349 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1350 struct fbcon_ops *ops = info->fbcon_par;
1351 struct display *p = &fb_display[vc->vc_num];
1352
1353 p->yscroll += count;
1354 if (p->yscroll >= p->vrows) /* Deal with wrap */
1355 p->yscroll -= p->vrows;
1356 ops->var.xoffset = 0;
1357 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1358 ops->var.vmode |= FB_VMODE_YWRAP;
1359 ops->update_start(info);
1360 scrollback_max += count;
1361 if (scrollback_max > scrollback_phys_max)
1362 scrollback_max = scrollback_phys_max;
1363 scrollback_current = 0;
1364 }
1365
1366 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1367 {
1368 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1369 struct fbcon_ops *ops = info->fbcon_par;
1370 struct display *p = &fb_display[vc->vc_num];
1371
1372 p->yscroll -= count;
1373 if (p->yscroll < 0) /* Deal with wrap */
1374 p->yscroll += p->vrows;
1375 ops->var.xoffset = 0;
1376 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1377 ops->var.vmode |= FB_VMODE_YWRAP;
1378 ops->update_start(info);
1379 scrollback_max -= count;
1380 if (scrollback_max < 0)
1381 scrollback_max = 0;
1382 scrollback_current = 0;
1383 }
1384
1385 static __inline__ void ypan_up(struct vc_data *vc, int count)
1386 {
1387 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1388 struct display *p = &fb_display[vc->vc_num];
1389 struct fbcon_ops *ops = info->fbcon_par;
1390
1391 p->yscroll += count;
1392 if (p->yscroll > p->vrows - vc->vc_rows) {
1393 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1394 0, 0, 0, vc->vc_rows, vc->vc_cols);
1395 p->yscroll -= p->vrows - vc->vc_rows;
1396 }
1397
1398 ops->var.xoffset = 0;
1399 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1400 ops->var.vmode &= ~FB_VMODE_YWRAP;
1401 ops->update_start(info);
1402 fbcon_clear_margins(vc, 1);
1403 scrollback_max += count;
1404 if (scrollback_max > scrollback_phys_max)
1405 scrollback_max = scrollback_phys_max;
1406 scrollback_current = 0;
1407 }
1408
1409 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1410 {
1411 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1412 struct fbcon_ops *ops = info->fbcon_par;
1413 struct display *p = &fb_display[vc->vc_num];
1414 int redraw = 0;
1415
1416 p->yscroll += count;
1417 if (p->yscroll > p->vrows - vc->vc_rows) {
1418 p->yscroll -= p->vrows - vc->vc_rows;
1419 redraw = 1;
1420 }
1421
1422 if (redraw)
1423 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1424
1425 ops->var.xoffset = 0;
1426 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1427 ops->var.vmode &= ~FB_VMODE_YWRAP;
1428 ops->update_start(info);
1429 fbcon_clear_margins(vc, 1);
1430 scrollback_max += count;
1431 if (scrollback_max > scrollback_phys_max)
1432 scrollback_max = scrollback_phys_max;
1433 scrollback_current = 0;
1434 }
1435
1436 static __inline__ void ypan_down(struct vc_data *vc, int count)
1437 {
1438 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1439 struct display *p = &fb_display[vc->vc_num];
1440 struct fbcon_ops *ops = info->fbcon_par;
1441
1442 p->yscroll -= count;
1443 if (p->yscroll < 0) {
1444 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1445 0, vc->vc_rows, vc->vc_cols);
1446 p->yscroll += p->vrows - vc->vc_rows;
1447 }
1448
1449 ops->var.xoffset = 0;
1450 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1451 ops->var.vmode &= ~FB_VMODE_YWRAP;
1452 ops->update_start(info);
1453 fbcon_clear_margins(vc, 1);
1454 scrollback_max -= count;
1455 if (scrollback_max < 0)
1456 scrollback_max = 0;
1457 scrollback_current = 0;
1458 }
1459
1460 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1461 {
1462 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1463 struct fbcon_ops *ops = info->fbcon_par;
1464 struct display *p = &fb_display[vc->vc_num];
1465 int redraw = 0;
1466
1467 p->yscroll -= count;
1468 if (p->yscroll < 0) {
1469 p->yscroll += p->vrows - vc->vc_rows;
1470 redraw = 1;
1471 }
1472
1473 if (redraw)
1474 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1475
1476 ops->var.xoffset = 0;
1477 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1478 ops->var.vmode &= ~FB_VMODE_YWRAP;
1479 ops->update_start(info);
1480 fbcon_clear_margins(vc, 1);
1481 scrollback_max -= count;
1482 if (scrollback_max < 0)
1483 scrollback_max = 0;
1484 scrollback_current = 0;
1485 }
1486
1487 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1488 long delta)
1489 {
1490 int count = vc->vc_rows;
1491 unsigned short *d, *s;
1492 unsigned long n;
1493 int line = 0;
1494
1495 d = (u16 *) softback_curr;
1496 if (d == (u16 *) softback_in)
1497 d = (u16 *) vc->vc_origin;
1498 n = softback_curr + delta * vc->vc_size_row;
1499 softback_lines -= delta;
1500 if (delta < 0) {
1501 if (softback_curr < softback_top && n < softback_buf) {
1502 n += softback_end - softback_buf;
1503 if (n < softback_top) {
1504 softback_lines -=
1505 (softback_top - n) / vc->vc_size_row;
1506 n = softback_top;
1507 }
1508 } else if (softback_curr >= softback_top
1509 && n < softback_top) {
1510 softback_lines -=
1511 (softback_top - n) / vc->vc_size_row;
1512 n = softback_top;
1513 }
1514 } else {
1515 if (softback_curr > softback_in && n >= softback_end) {
1516 n += softback_buf - softback_end;
1517 if (n > softback_in) {
1518 n = softback_in;
1519 softback_lines = 0;
1520 }
1521 } else if (softback_curr <= softback_in && n > softback_in) {
1522 n = softback_in;
1523 softback_lines = 0;
1524 }
1525 }
1526 if (n == softback_curr)
1527 return;
1528 softback_curr = n;
1529 s = (u16 *) softback_curr;
1530 if (s == (u16 *) softback_in)
1531 s = (u16 *) vc->vc_origin;
1532 while (count--) {
1533 unsigned short *start;
1534 unsigned short *le;
1535 unsigned short c;
1536 int x = 0;
1537 unsigned short attr = 1;
1538
1539 start = s;
1540 le = advance_row(s, 1);
1541 do {
1542 c = scr_readw(s);
1543 if (attr != (c & 0xff00)) {
1544 attr = c & 0xff00;
1545 if (s > start) {
1546 fbcon_putcs(vc, start, s - start,
1547 line, x);
1548 x += s - start;
1549 start = s;
1550 }
1551 }
1552 if (c == scr_readw(d)) {
1553 if (s > start) {
1554 fbcon_putcs(vc, start, s - start,
1555 line, x);
1556 x += s - start + 1;
1557 start = s + 1;
1558 } else {
1559 x++;
1560 start++;
1561 }
1562 }
1563 s++;
1564 d++;
1565 } while (s < le);
1566 if (s > start)
1567 fbcon_putcs(vc, start, s - start, line, x);
1568 line++;
1569 if (d == (u16 *) softback_end)
1570 d = (u16 *) softback_buf;
1571 if (d == (u16 *) softback_in)
1572 d = (u16 *) vc->vc_origin;
1573 if (s == (u16 *) softback_end)
1574 s = (u16 *) softback_buf;
1575 if (s == (u16 *) softback_in)
1576 s = (u16 *) vc->vc_origin;
1577 }
1578 }
1579
1580 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1581 int line, int count, int dy)
1582 {
1583 unsigned short *s = (unsigned short *)
1584 (vc->vc_origin + vc->vc_size_row * line);
1585
1586 while (count--) {
1587 unsigned short *start = s;
1588 unsigned short *le = advance_row(s, 1);
1589 unsigned short c;
1590 int x = 0;
1591 unsigned short attr = 1;
1592
1593 do {
1594 c = scr_readw(s);
1595 if (attr != (c & 0xff00)) {
1596 attr = c & 0xff00;
1597 if (s > start) {
1598 fbcon_putcs(vc, start, s - start,
1599 dy, x);
1600 x += s - start;
1601 start = s;
1602 }
1603 }
1604 console_conditional_schedule();
1605 s++;
1606 } while (s < le);
1607 if (s > start)
1608 fbcon_putcs(vc, start, s - start, dy, x);
1609 console_conditional_schedule();
1610 dy++;
1611 }
1612 }
1613
1614 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1615 int line, int count, int offset)
1616 {
1617 unsigned short *d = (unsigned short *)
1618 (vc->vc_origin + vc->vc_size_row * line);
1619 unsigned short *s = d + offset;
1620
1621 while (count--) {
1622 unsigned short *start = s;
1623 unsigned short *le = advance_row(s, 1);
1624 unsigned short c;
1625 int x = 0;
1626 unsigned short attr = 1;
1627
1628 do {
1629 c = scr_readw(s);
1630 if (attr != (c & 0xff00)) {
1631 attr = c & 0xff00;
1632 if (s > start) {
1633 fbcon_putcs(vc, start, s - start,
1634 line, x);
1635 x += s - start;
1636 start = s;
1637 }
1638 }
1639 if (c == scr_readw(d)) {
1640 if (s > start) {
1641 fbcon_putcs(vc, start, s - start,
1642 line, x);
1643 x += s - start + 1;
1644 start = s + 1;
1645 } else {
1646 x++;
1647 start++;
1648 }
1649 }
1650 scr_writew(c, d);
1651 console_conditional_schedule();
1652 s++;
1653 d++;
1654 } while (s < le);
1655 if (s > start)
1656 fbcon_putcs(vc, start, s - start, line, x);
1657 console_conditional_schedule();
1658 if (offset > 0)
1659 line++;
1660 else {
1661 line--;
1662 /* NOTE: We subtract two lines from these pointers */
1663 s -= vc->vc_size_row;
1664 d -= vc->vc_size_row;
1665 }
1666 }
1667 }
1668
1669 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1670 int count)
1671 {
1672 unsigned short *p;
1673
1674 if (vc->vc_num != fg_console)
1675 return;
1676 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1677
1678 while (count) {
1679 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1680 count--;
1681 p = advance_row(p, 1);
1682 softback_in += vc->vc_size_row;
1683 if (softback_in == softback_end)
1684 softback_in = softback_buf;
1685 if (softback_in == softback_top) {
1686 softback_top += vc->vc_size_row;
1687 if (softback_top == softback_end)
1688 softback_top = softback_buf;
1689 }
1690 }
1691 softback_curr = softback_in;
1692 }
1693
1694 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1695 int count)
1696 {
1697 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1698 struct display *p = &fb_display[vc->vc_num];
1699 struct fbcon_ops *ops = info->fbcon_par;
1700 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1701
1702 if (fbcon_is_inactive(vc, info))
1703 return -EINVAL;
1704
1705 fbcon_cursor(vc, CM_ERASE);
1706
1707 /*
1708 * ++Geert: Only use ywrap/ypan if the console is in text mode
1709 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1710 * whole screen (prevents flicker).
1711 */
1712
1713 switch (dir) {
1714 case SM_UP:
1715 if (count > vc->vc_rows) /* Maximum realistic size */
1716 count = vc->vc_rows;
1717 if (softback_top)
1718 fbcon_softback_note(vc, t, count);
1719 if (logo_shown >= 0)
1720 goto redraw_up;
1721 switch (p->scrollmode) {
1722 case SCROLL_MOVE:
1723 ops->bmove(vc, info, t + count, 0, t, 0,
1724 b - t - count, vc->vc_cols);
1725 ops->clear(vc, info, b - count, 0, count,
1726 vc->vc_cols);
1727 break;
1728
1729 case SCROLL_WRAP_MOVE:
1730 if (b - t - count > 3 * vc->vc_rows >> 2) {
1731 if (t > 0)
1732 fbcon_bmove(vc, 0, 0, count, 0, t,
1733 vc->vc_cols);
1734 ywrap_up(vc, count);
1735 if (vc->vc_rows - b > 0)
1736 fbcon_bmove(vc, b - count, 0, b, 0,
1737 vc->vc_rows - b,
1738 vc->vc_cols);
1739 } else if (info->flags & FBINFO_READS_FAST)
1740 fbcon_bmove(vc, t + count, 0, t, 0,
1741 b - t - count, vc->vc_cols);
1742 else
1743 goto redraw_up;
1744 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1745 break;
1746
1747 case SCROLL_PAN_REDRAW:
1748 if ((p->yscroll + count <=
1749 2 * (p->vrows - vc->vc_rows))
1750 && ((!scroll_partial && (b - t == vc->vc_rows))
1751 || (scroll_partial
1752 && (b - t - count >
1753 3 * vc->vc_rows >> 2)))) {
1754 if (t > 0)
1755 fbcon_redraw_move(vc, p, 0, t, count);
1756 ypan_up_redraw(vc, t, count);
1757 if (vc->vc_rows - b > 0)
1758 fbcon_redraw_move(vc, p, b - count,
1759 vc->vc_rows - b, b);
1760 } else
1761 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1762 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1763 break;
1764
1765 case SCROLL_PAN_MOVE:
1766 if ((p->yscroll + count <=
1767 2 * (p->vrows - vc->vc_rows))
1768 && ((!scroll_partial && (b - t == vc->vc_rows))
1769 || (scroll_partial
1770 && (b - t - count >
1771 3 * vc->vc_rows >> 2)))) {
1772 if (t > 0)
1773 fbcon_bmove(vc, 0, 0, count, 0, t,
1774 vc->vc_cols);
1775 ypan_up(vc, count);
1776 if (vc->vc_rows - b > 0)
1777 fbcon_bmove(vc, b - count, 0, b, 0,
1778 vc->vc_rows - b,
1779 vc->vc_cols);
1780 } else if (info->flags & FBINFO_READS_FAST)
1781 fbcon_bmove(vc, t + count, 0, t, 0,
1782 b - t - count, vc->vc_cols);
1783 else
1784 goto redraw_up;
1785 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1786 break;
1787
1788 case SCROLL_REDRAW:
1789 redraw_up:
1790 fbcon_redraw(vc, p, t, b - t - count,
1791 count * vc->vc_cols);
1792 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1793 scr_memsetw((unsigned short *) (vc->vc_origin +
1794 vc->vc_size_row *
1795 (b - count)),
1796 vc->vc_video_erase_char,
1797 vc->vc_size_row * count);
1798 return 1;
1799 }
1800 break;
1801
1802 case SM_DOWN:
1803 if (count > vc->vc_rows) /* Maximum realistic size */
1804 count = vc->vc_rows;
1805 if (logo_shown >= 0)
1806 goto redraw_down;
1807 switch (p->scrollmode) {
1808 case SCROLL_MOVE:
1809 ops->bmove(vc, info, t, 0, t + count, 0,
1810 b - t - count, vc->vc_cols);
1811 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1812 break;
1813
1814 case SCROLL_WRAP_MOVE:
1815 if (b - t - count > 3 * vc->vc_rows >> 2) {
1816 if (vc->vc_rows - b > 0)
1817 fbcon_bmove(vc, b, 0, b - count, 0,
1818 vc->vc_rows - b,
1819 vc->vc_cols);
1820 ywrap_down(vc, count);
1821 if (t > 0)
1822 fbcon_bmove(vc, count, 0, 0, 0, t,
1823 vc->vc_cols);
1824 } else if (info->flags & FBINFO_READS_FAST)
1825 fbcon_bmove(vc, t, 0, t + count, 0,
1826 b - t - count, vc->vc_cols);
1827 else
1828 goto redraw_down;
1829 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1830 break;
1831
1832 case SCROLL_PAN_MOVE:
1833 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1834 && ((!scroll_partial && (b - t == vc->vc_rows))
1835 || (scroll_partial
1836 && (b - t - count >
1837 3 * vc->vc_rows >> 2)))) {
1838 if (vc->vc_rows - b > 0)
1839 fbcon_bmove(vc, b, 0, b - count, 0,
1840 vc->vc_rows - b,
1841 vc->vc_cols);
1842 ypan_down(vc, count);
1843 if (t > 0)
1844 fbcon_bmove(vc, count, 0, 0, 0, t,
1845 vc->vc_cols);
1846 } else if (info->flags & FBINFO_READS_FAST)
1847 fbcon_bmove(vc, t, 0, t + count, 0,
1848 b - t - count, vc->vc_cols);
1849 else
1850 goto redraw_down;
1851 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1852 break;
1853
1854 case SCROLL_PAN_REDRAW:
1855 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1856 && ((!scroll_partial && (b - t == vc->vc_rows))
1857 || (scroll_partial
1858 && (b - t - count >
1859 3 * vc->vc_rows >> 2)))) {
1860 if (vc->vc_rows - b > 0)
1861 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1862 b - count);
1863 ypan_down_redraw(vc, t, count);
1864 if (t > 0)
1865 fbcon_redraw_move(vc, p, count, t, 0);
1866 } else
1867 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1868 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1869 break;
1870
1871 case SCROLL_REDRAW:
1872 redraw_down:
1873 fbcon_redraw(vc, p, b - 1, b - t - count,
1874 -count * vc->vc_cols);
1875 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1876 scr_memsetw((unsigned short *) (vc->vc_origin +
1877 vc->vc_size_row *
1878 t),
1879 vc->vc_video_erase_char,
1880 vc->vc_size_row * count);
1881 return 1;
1882 }
1883 }
1884 return 0;
1885 }
1886
1887
1888 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1889 int height, int width)
1890 {
1891 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1892 struct display *p = &fb_display[vc->vc_num];
1893
1894 if (fbcon_is_inactive(vc, info))
1895 return;
1896
1897 if (!width || !height)
1898 return;
1899
1900 /* Split blits that cross physical y_wrap case.
1901 * Pathological case involves 4 blits, better to use recursive
1902 * code rather than unrolled case
1903 *
1904 * Recursive invocations don't need to erase the cursor over and
1905 * over again, so we use fbcon_bmove_rec()
1906 */
1907 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1908 p->vrows - p->yscroll);
1909 }
1910
1911 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1912 int dy, int dx, int height, int width, u_int y_break)
1913 {
1914 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1915 struct fbcon_ops *ops = info->fbcon_par;
1916 u_int b;
1917
1918 if (sy < y_break && sy + height > y_break) {
1919 b = y_break - sy;
1920 if (dy < sy) { /* Avoid trashing self */
1921 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1922 y_break);
1923 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1924 height - b, width, y_break);
1925 } else {
1926 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1927 height - b, width, y_break);
1928 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1929 y_break);
1930 }
1931 return;
1932 }
1933
1934 if (dy < y_break && dy + height > y_break) {
1935 b = y_break - dy;
1936 if (dy < sy) { /* Avoid trashing self */
1937 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1938 y_break);
1939 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1940 height - b, width, y_break);
1941 } else {
1942 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1943 height - b, width, y_break);
1944 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1945 y_break);
1946 }
1947 return;
1948 }
1949 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1950 height, width);
1951 }
1952
1953 static __inline__ void updatescrollmode(struct display *p,
1954 struct fb_info *info,
1955 struct vc_data *vc)
1956 {
1957 struct fbcon_ops *ops = info->fbcon_par;
1958 int fh = vc->vc_font.height;
1959 int cap = info->flags;
1960 u16 t = 0;
1961 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1962 info->fix.xpanstep);
1963 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1964 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1965 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1966 info->var.xres_virtual);
1967 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1968 divides(ypan, vc->vc_font.height) && vyres > yres;
1969 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1970 divides(ywrap, vc->vc_font.height) &&
1971 divides(vc->vc_font.height, vyres);
1972 int reading_fast = cap & FBINFO_READS_FAST;
1973 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1974 !(cap & FBINFO_HWACCEL_DISABLED);
1975 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1976 !(cap & FBINFO_HWACCEL_DISABLED);
1977
1978 p->vrows = vyres/fh;
1979 if (yres > (fh * (vc->vc_rows + 1)))
1980 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1981 if ((yres % fh) && (vyres % fh < yres % fh))
1982 p->vrows--;
1983
1984 if (good_wrap || good_pan) {
1985 if (reading_fast || fast_copyarea)
1986 p->scrollmode = good_wrap ?
1987 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1988 else
1989 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1990 SCROLL_PAN_REDRAW;
1991 } else {
1992 if (reading_fast || (fast_copyarea && !fast_imageblit))
1993 p->scrollmode = SCROLL_MOVE;
1994 else
1995 p->scrollmode = SCROLL_REDRAW;
1996 }
1997 }
1998
1999 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2000 unsigned int height)
2001 {
2002 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2003 struct fbcon_ops *ops = info->fbcon_par;
2004 struct display *p = &fb_display[vc->vc_num];
2005 struct fb_var_screeninfo var = info->var;
2006 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2007
2008 virt_w = FBCON_SWAP(ops->rotate, width, height);
2009 virt_h = FBCON_SWAP(ops->rotate, height, width);
2010 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2011 vc->vc_font.height);
2012 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2013 vc->vc_font.width);
2014 var.xres = virt_w * virt_fw;
2015 var.yres = virt_h * virt_fh;
2016 x_diff = info->var.xres - var.xres;
2017 y_diff = info->var.yres - var.yres;
2018 if (x_diff < 0 || x_diff > virt_fw ||
2019 y_diff < 0 || y_diff > virt_fh) {
2020 struct fb_videomode *mode;
2021
2022 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2023 mode = fb_find_best_mode(&var, &info->modelist);
2024 if (mode == NULL)
2025 return -EINVAL;
2026 display_to_var(&var, p);
2027 fb_videomode_to_var(&var, mode);
2028
2029 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2030 return -EINVAL;
2031
2032 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2033 if (CON_IS_VISIBLE(vc)) {
2034 var.activate = FB_ACTIVATE_NOW |
2035 FB_ACTIVATE_FORCE;
2036 fb_set_var(info, &var);
2037 }
2038 var_to_display(p, &info->var, info);
2039 ops->var = info->var;
2040 }
2041 updatescrollmode(p, info, vc);
2042 return 0;
2043 }
2044
2045 static int fbcon_switch(struct vc_data *vc)
2046 {
2047 struct fb_info *info, *old_info = NULL;
2048 struct fbcon_ops *ops;
2049 struct display *p = &fb_display[vc->vc_num];
2050 struct fb_var_screeninfo var;
2051 int i, prev_console, charcnt = 256;
2052
2053 info = registered_fb[con2fb_map[vc->vc_num]];
2054 ops = info->fbcon_par;
2055
2056 if (softback_top) {
2057 if (softback_lines)
2058 fbcon_set_origin(vc);
2059 softback_top = softback_curr = softback_in = softback_buf;
2060 softback_lines = 0;
2061 fbcon_update_softback(vc);
2062 }
2063
2064 if (logo_shown >= 0) {
2065 struct vc_data *conp2 = vc_cons[logo_shown].d;
2066
2067 if (conp2->vc_top == logo_lines
2068 && conp2->vc_bottom == conp2->vc_rows)
2069 conp2->vc_top = 0;
2070 logo_shown = FBCON_LOGO_CANSHOW;
2071 }
2072
2073 prev_console = ops->currcon;
2074 if (prev_console != -1)
2075 old_info = registered_fb[con2fb_map[prev_console]];
2076 /*
2077 * FIXME: If we have multiple fbdev's loaded, we need to
2078 * update all info->currcon. Perhaps, we can place this
2079 * in a centralized structure, but this might break some
2080 * drivers.
2081 *
2082 * info->currcon = vc->vc_num;
2083 */
2084 for (i = 0; i < FB_MAX; i++) {
2085 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2086 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2087
2088 o->currcon = vc->vc_num;
2089 }
2090 }
2091 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2092 display_to_var(&var, p);
2093 var.activate = FB_ACTIVATE_NOW;
2094
2095 /*
2096 * make sure we don't unnecessarily trip the memcmp()
2097 * in fb_set_var()
2098 */
2099 info->var.activate = var.activate;
2100 var.yoffset = info->var.yoffset;
2101 var.xoffset = info->var.xoffset;
2102 var.vmode = info->var.vmode;
2103 fb_set_var(info, &var);
2104 ops->var = info->var;
2105
2106 if (old_info != NULL && (old_info != info ||
2107 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2108 if (info->fbops->fb_set_par)
2109 info->fbops->fb_set_par(info);
2110 fbcon_del_cursor_timer(old_info);
2111 fbcon_add_cursor_timer(info);
2112 }
2113
2114 set_blitting_type(vc, info, p);
2115 ops->cursor_reset = 1;
2116
2117 if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
2118 ops->rotate = FB_ROTATE_UR;
2119 set_blitting_type(vc, info, p);
2120 }
2121
2122 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2123 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2124
2125 if (p->userfont)
2126 charcnt = FNTCHARCNT(vc->vc_font.data);
2127
2128 if (charcnt > 256)
2129 vc->vc_complement_mask <<= 1;
2130
2131 updatescrollmode(p, info, vc);
2132
2133 switch (p->scrollmode) {
2134 case SCROLL_WRAP_MOVE:
2135 scrollback_phys_max = p->vrows - vc->vc_rows;
2136 break;
2137 case SCROLL_PAN_MOVE:
2138 case SCROLL_PAN_REDRAW:
2139 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2140 if (scrollback_phys_max < 0)
2141 scrollback_phys_max = 0;
2142 break;
2143 default:
2144 scrollback_phys_max = 0;
2145 break;
2146 }
2147
2148 scrollback_max = 0;
2149 scrollback_current = 0;
2150
2151 if (!fbcon_is_inactive(vc, info)) {
2152 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2153 ops->update_start(info);
2154 }
2155
2156 fbcon_set_palette(vc, color_table);
2157 fbcon_clear_margins(vc, 0);
2158
2159 if (logo_shown == FBCON_LOGO_DRAW) {
2160
2161 logo_shown = fg_console;
2162 /* This is protected above by initmem_freed */
2163 fb_show_logo(info, ops->rotate);
2164 update_region(vc,
2165 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2166 vc->vc_size_row * (vc->vc_bottom -
2167 vc->vc_top) / 2);
2168 return 0;
2169 }
2170 return 1;
2171 }
2172
2173 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2174 int blank)
2175 {
2176 if (blank) {
2177 unsigned short charmask = vc->vc_hi_font_mask ?
2178 0x1ff : 0xff;
2179 unsigned short oldc;
2180
2181 oldc = vc->vc_video_erase_char;
2182 vc->vc_video_erase_char &= charmask;
2183 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2184 vc->vc_video_erase_char = oldc;
2185 }
2186 }
2187
2188 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2189 {
2190 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2191 struct fbcon_ops *ops = info->fbcon_par;
2192
2193 if (mode_switch) {
2194 struct fb_var_screeninfo var = info->var;
2195
2196 ops->graphics = 1;
2197
2198 if (!blank) {
2199 if (info->fbops->fb_save_state)
2200 info->fbops->fb_save_state(info);
2201 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2202 fb_set_var(info, &var);
2203 ops->graphics = 0;
2204 ops->var = info->var;
2205 } else if (info->fbops->fb_restore_state)
2206 info->fbops->fb_restore_state(info);
2207 }
2208
2209 if (!fbcon_is_inactive(vc, info)) {
2210 if (ops->blank_state != blank) {
2211 ops->blank_state = blank;
2212 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2213 ops->cursor_flash = (!blank);
2214
2215 if (fb_blank(info, blank))
2216 fbcon_generic_blank(vc, info, blank);
2217 }
2218
2219 if (!blank)
2220 update_screen(vc);
2221 }
2222
2223 if (!blank)
2224 fbcon_add_cursor_timer(info);
2225 else
2226 fbcon_del_cursor_timer(info);
2227
2228 return 0;
2229 }
2230
2231 static void fbcon_free_font(struct display *p)
2232 {
2233 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2234 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2235 p->fontdata = NULL;
2236 p->userfont = 0;
2237 }
2238
2239 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2240 {
2241 u8 *fontdata = vc->vc_font.data;
2242 u8 *data = font->data;
2243 int i, j;
2244
2245 font->width = vc->vc_font.width;
2246 font->height = vc->vc_font.height;
2247 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2248 if (!font->data)
2249 return 0;
2250
2251 if (font->width <= 8) {
2252 j = vc->vc_font.height;
2253 for (i = 0; i < font->charcount; i++) {
2254 memcpy(data, fontdata, j);
2255 memset(data + j, 0, 32 - j);
2256 data += 32;
2257 fontdata += j;
2258 }
2259 } else if (font->width <= 16) {
2260 j = vc->vc_font.height * 2;
2261 for (i = 0; i < font->charcount; i++) {
2262 memcpy(data, fontdata, j);
2263 memset(data + j, 0, 64 - j);
2264 data += 64;
2265 fontdata += j;
2266 }
2267 } else if (font->width <= 24) {
2268 for (i = 0; i < font->charcount; i++) {
2269 for (j = 0; j < vc->vc_font.height; j++) {
2270 *data++ = fontdata[0];
2271 *data++ = fontdata[1];
2272 *data++ = fontdata[2];
2273 fontdata += sizeof(u32);
2274 }
2275 memset(data, 0, 3 * (32 - j));
2276 data += 3 * (32 - j);
2277 }
2278 } else {
2279 j = vc->vc_font.height * 4;
2280 for (i = 0; i < font->charcount; i++) {
2281 memcpy(data, fontdata, j);
2282 memset(data + j, 0, 128 - j);
2283 data += 128;
2284 fontdata += j;
2285 }
2286 }
2287 return 0;
2288 }
2289
2290 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2291 const u8 * data, int userfont)
2292 {
2293 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2294 struct fbcon_ops *ops = info->fbcon_par;
2295 struct display *p = &fb_display[vc->vc_num];
2296 int resize;
2297 int cnt;
2298 char *old_data = NULL;
2299
2300 if (CON_IS_VISIBLE(vc) && softback_lines)
2301 fbcon_set_origin(vc);
2302
2303 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2304 if (p->userfont)
2305 old_data = vc->vc_font.data;
2306 if (userfont)
2307 cnt = FNTCHARCNT(data);
2308 else
2309 cnt = 256;
2310 vc->vc_font.data = (void *)(p->fontdata = data);
2311 if ((p->userfont = userfont))
2312 REFCOUNT(data)++;
2313 vc->vc_font.width = w;
2314 vc->vc_font.height = h;
2315 if (vc->vc_hi_font_mask && cnt == 256) {
2316 vc->vc_hi_font_mask = 0;
2317 if (vc->vc_can_do_color) {
2318 vc->vc_complement_mask >>= 1;
2319 vc->vc_s_complement_mask >>= 1;
2320 }
2321
2322 /* ++Edmund: reorder the attribute bits */
2323 if (vc->vc_can_do_color) {
2324 unsigned short *cp =
2325 (unsigned short *) vc->vc_origin;
2326 int count = vc->vc_screenbuf_size / 2;
2327 unsigned short c;
2328 for (; count > 0; count--, cp++) {
2329 c = scr_readw(cp);
2330 scr_writew(((c & 0xfe00) >> 1) |
2331 (c & 0xff), cp);
2332 }
2333 c = vc->vc_video_erase_char;
2334 vc->vc_video_erase_char =
2335 ((c & 0xfe00) >> 1) | (c & 0xff);
2336 vc->vc_attr >>= 1;
2337 }
2338 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2339 vc->vc_hi_font_mask = 0x100;
2340 if (vc->vc_can_do_color) {
2341 vc->vc_complement_mask <<= 1;
2342 vc->vc_s_complement_mask <<= 1;
2343 }
2344
2345 /* ++Edmund: reorder the attribute bits */
2346 {
2347 unsigned short *cp =
2348 (unsigned short *) vc->vc_origin;
2349 int count = vc->vc_screenbuf_size / 2;
2350 unsigned short c;
2351 for (; count > 0; count--, cp++) {
2352 unsigned short newc;
2353 c = scr_readw(cp);
2354 if (vc->vc_can_do_color)
2355 newc =
2356 ((c & 0xff00) << 1) | (c &
2357 0xff);
2358 else
2359 newc = c & ~0x100;
2360 scr_writew(newc, cp);
2361 }
2362 c = vc->vc_video_erase_char;
2363 if (vc->vc_can_do_color) {
2364 vc->vc_video_erase_char =
2365 ((c & 0xff00) << 1) | (c & 0xff);
2366 vc->vc_attr <<= 1;
2367 } else
2368 vc->vc_video_erase_char = c & ~0x100;
2369 }
2370
2371 }
2372
2373 if (resize) {
2374 int cols, rows;
2375
2376 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2377 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2378 cols /= w;
2379 rows /= h;
2380 vc_resize(vc, cols, rows);
2381 if (CON_IS_VISIBLE(vc) && softback_buf)
2382 fbcon_update_softback(vc);
2383 } else if (CON_IS_VISIBLE(vc)
2384 && vc->vc_mode == KD_TEXT) {
2385 fbcon_clear_margins(vc, 0);
2386 update_screen(vc);
2387 }
2388
2389 if (old_data && (--REFCOUNT(old_data) == 0))
2390 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2391 return 0;
2392 }
2393
2394 static int fbcon_copy_font(struct vc_data *vc, int con)
2395 {
2396 struct display *od = &fb_display[con];
2397 struct console_font *f = &vc->vc_font;
2398
2399 if (od->fontdata == f->data)
2400 return 0; /* already the same font... */
2401 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2402 }
2403
2404 /*
2405 * User asked to set font; we are guaranteed that
2406 * a) width and height are in range 1..32
2407 * b) charcount does not exceed 512
2408 * but lets not assume that, since someone might someday want to use larger
2409 * fonts. And charcount of 512 is small for unicode support.
2410 *
2411 * However, user space gives the font in 32 rows , regardless of
2412 * actual font height. So a new API is needed if support for larger fonts
2413 * is ever implemented.
2414 */
2415
2416 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2417 {
2418 unsigned charcount = font->charcount;
2419 int w = font->width;
2420 int h = font->height;
2421 int size;
2422 int i, csum;
2423 u8 *new_data, *data = font->data;
2424 int pitch = (font->width+7) >> 3;
2425
2426 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2427 * If not this check should be changed to charcount < 256 */
2428 if (charcount != 256 && charcount != 512)
2429 return -EINVAL;
2430
2431 size = h * pitch * charcount;
2432
2433 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2434
2435 if (!new_data)
2436 return -ENOMEM;
2437
2438 new_data += FONT_EXTRA_WORDS * sizeof(int);
2439 FNTSIZE(new_data) = size;
2440 FNTCHARCNT(new_data) = charcount;
2441 REFCOUNT(new_data) = 0; /* usage counter */
2442 for (i=0; i< charcount; i++) {
2443 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2444 }
2445
2446 /* Since linux has a nice crc32 function use it for counting font
2447 * checksums. */
2448 csum = crc32(0, new_data, size);
2449
2450 FNTSUM(new_data) = csum;
2451 /* Check if the same font is on some other console already */
2452 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2453 struct vc_data *tmp = vc_cons[i].d;
2454
2455 if (fb_display[i].userfont &&
2456 fb_display[i].fontdata &&
2457 FNTSUM(fb_display[i].fontdata) == csum &&
2458 FNTSIZE(fb_display[i].fontdata) == size &&
2459 tmp->vc_font.width == w &&
2460 !memcmp(fb_display[i].fontdata, new_data, size)) {
2461 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2462 new_data = (u8 *)fb_display[i].fontdata;
2463 break;
2464 }
2465 }
2466 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2467 }
2468
2469 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2470 {
2471 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2472 const struct font_desc *f;
2473
2474 if (!name)
2475 f = get_default_font(info->var.xres, info->var.yres);
2476 else if (!(f = find_font(name)))
2477 return -ENOENT;
2478
2479 font->width = f->width;
2480 font->height = f->height;
2481 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2482 }
2483
2484 static u16 palette_red[16];
2485 static u16 palette_green[16];
2486 static u16 palette_blue[16];
2487
2488 static struct fb_cmap palette_cmap = {
2489 0, 16, palette_red, palette_green, palette_blue, NULL
2490 };
2491
2492 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2493 {
2494 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2495 int i, j, k, depth;
2496 u8 val;
2497
2498 if (fbcon_is_inactive(vc, info))
2499 return -EINVAL;
2500
2501 if (!CON_IS_VISIBLE(vc))
2502 return 0;
2503
2504 depth = fb_get_color_depth(&info->var, &info->fix);
2505 if (depth > 3) {
2506 for (i = j = 0; i < 16; i++) {
2507 k = table[i];
2508 val = vc->vc_palette[j++];
2509 palette_red[k] = (val << 8) | val;
2510 val = vc->vc_palette[j++];
2511 palette_green[k] = (val << 8) | val;
2512 val = vc->vc_palette[j++];
2513 palette_blue[k] = (val << 8) | val;
2514 }
2515 palette_cmap.len = 16;
2516 palette_cmap.start = 0;
2517 /*
2518 * If framebuffer is capable of less than 16 colors,
2519 * use default palette of fbcon.
2520 */
2521 } else
2522 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2523
2524 return fb_set_cmap(&palette_cmap, info);
2525 }
2526
2527 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2528 {
2529 unsigned long p;
2530 int line;
2531
2532 if (vc->vc_num != fg_console || !softback_lines)
2533 return (u16 *) (vc->vc_origin + offset);
2534 line = offset / vc->vc_size_row;
2535 if (line >= softback_lines)
2536 return (u16 *) (vc->vc_origin + offset -
2537 softback_lines * vc->vc_size_row);
2538 p = softback_curr + offset;
2539 if (p >= softback_end)
2540 p += softback_buf - softback_end;
2541 return (u16 *) p;
2542 }
2543
2544 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2545 int *px, int *py)
2546 {
2547 unsigned long ret;
2548 int x, y;
2549
2550 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2551 unsigned long offset = (pos - vc->vc_origin) / 2;
2552
2553 x = offset % vc->vc_cols;
2554 y = offset / vc->vc_cols;
2555 if (vc->vc_num == fg_console)
2556 y += softback_lines;
2557 ret = pos + (vc->vc_cols - x) * 2;
2558 } else if (vc->vc_num == fg_console && softback_lines) {
2559 unsigned long offset = pos - softback_curr;
2560
2561 if (pos < softback_curr)
2562 offset += softback_end - softback_buf;
2563 offset /= 2;
2564 x = offset % vc->vc_cols;
2565 y = offset / vc->vc_cols;
2566 ret = pos + (vc->vc_cols - x) * 2;
2567 if (ret == softback_end)
2568 ret = softback_buf;
2569 if (ret == softback_in)
2570 ret = vc->vc_origin;
2571 } else {
2572 /* Should not happen */
2573 x = y = 0;
2574 ret = vc->vc_origin;
2575 }
2576 if (px)
2577 *px = x;
2578 if (py)
2579 *py = y;
2580 return ret;
2581 }
2582
2583 /* As we might be inside of softback, we may work with non-contiguous buffer,
2584 that's why we have to use a separate routine. */
2585 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2586 {
2587 while (cnt--) {
2588 u16 a = scr_readw(p);
2589 if (!vc->vc_can_do_color)
2590 a ^= 0x0800;
2591 else if (vc->vc_hi_font_mask == 0x100)
2592 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2593 (((a) & 0x0e00) << 4);
2594 else
2595 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2596 (((a) & 0x0700) << 4);
2597 scr_writew(a, p++);
2598 if (p == (u16 *) softback_end)
2599 p = (u16 *) softback_buf;
2600 if (p == (u16 *) softback_in)
2601 p = (u16 *) vc->vc_origin;
2602 }
2603 }
2604
2605 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2606 {
2607 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2608 struct fbcon_ops *ops = info->fbcon_par;
2609 struct display *p = &fb_display[fg_console];
2610 int offset, limit, scrollback_old;
2611
2612 if (softback_top) {
2613 if (vc->vc_num != fg_console)
2614 return 0;
2615 if (vc->vc_mode != KD_TEXT || !lines)
2616 return 0;
2617 if (logo_shown >= 0) {
2618 struct vc_data *conp2 = vc_cons[logo_shown].d;
2619
2620 if (conp2->vc_top == logo_lines
2621 && conp2->vc_bottom == conp2->vc_rows)
2622 conp2->vc_top = 0;
2623 if (logo_shown == vc->vc_num) {
2624 unsigned long p, q;
2625 int i;
2626
2627 p = softback_in;
2628 q = vc->vc_origin +
2629 logo_lines * vc->vc_size_row;
2630 for (i = 0; i < logo_lines; i++) {
2631 if (p == softback_top)
2632 break;
2633 if (p == softback_buf)
2634 p = softback_end;
2635 p -= vc->vc_size_row;
2636 q -= vc->vc_size_row;
2637 scr_memcpyw((u16 *) q, (u16 *) p,
2638 vc->vc_size_row);
2639 }
2640 softback_in = p;
2641 update_region(vc, vc->vc_origin,
2642 logo_lines * vc->vc_cols);
2643 }
2644 logo_shown = FBCON_LOGO_CANSHOW;
2645 }
2646 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2647 fbcon_redraw_softback(vc, p, lines);
2648 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2649 return 0;
2650 }
2651
2652 if (!scrollback_phys_max)
2653 return -ENOSYS;
2654
2655 scrollback_old = scrollback_current;
2656 scrollback_current -= lines;
2657 if (scrollback_current < 0)
2658 scrollback_current = 0;
2659 else if (scrollback_current > scrollback_max)
2660 scrollback_current = scrollback_max;
2661 if (scrollback_current == scrollback_old)
2662 return 0;
2663
2664 if (fbcon_is_inactive(vc, info))
2665 return 0;
2666
2667 fbcon_cursor(vc, CM_ERASE);
2668
2669 offset = p->yscroll - scrollback_current;
2670 limit = p->vrows;
2671 switch (p->scrollmode) {
2672 case SCROLL_WRAP_MOVE:
2673 info->var.vmode |= FB_VMODE_YWRAP;
2674 break;
2675 case SCROLL_PAN_MOVE:
2676 case SCROLL_PAN_REDRAW:
2677 limit -= vc->vc_rows;
2678 info->var.vmode &= ~FB_VMODE_YWRAP;
2679 break;
2680 }
2681 if (offset < 0)
2682 offset += limit;
2683 else if (offset >= limit)
2684 offset -= limit;
2685
2686 ops->var.xoffset = 0;
2687 ops->var.yoffset = offset * vc->vc_font.height;
2688 ops->update_start(info);
2689
2690 if (!scrollback_current)
2691 fbcon_cursor(vc, CM_DRAW);
2692 return 0;
2693 }
2694
2695 static int fbcon_set_origin(struct vc_data *vc)
2696 {
2697 if (softback_lines)
2698 fbcon_scrolldelta(vc, softback_lines);
2699 return 0;
2700 }
2701
2702 static void fbcon_suspended(struct fb_info *info)
2703 {
2704 struct vc_data *vc = NULL;
2705 struct fbcon_ops *ops = info->fbcon_par;
2706
2707 if (!ops || ops->currcon < 0)
2708 return;
2709 vc = vc_cons[ops->currcon].d;
2710
2711 /* Clear cursor, restore saved data */
2712 fbcon_cursor(vc, CM_ERASE);
2713 }
2714
2715 static void fbcon_resumed(struct fb_info *info)
2716 {
2717 struct vc_data *vc;
2718 struct fbcon_ops *ops = info->fbcon_par;
2719
2720 if (!ops || ops->currcon < 0)
2721 return;
2722 vc = vc_cons[ops->currcon].d;
2723
2724 update_screen(vc);
2725 }
2726
2727 static void fbcon_modechanged(struct fb_info *info)
2728 {
2729 struct fbcon_ops *ops = info->fbcon_par;
2730 struct vc_data *vc;
2731 struct display *p;
2732 int rows, cols;
2733
2734 if (!ops || ops->currcon < 0)
2735 return;
2736 vc = vc_cons[ops->currcon].d;
2737 if (vc->vc_mode != KD_TEXT ||
2738 registered_fb[con2fb_map[ops->currcon]] != info)
2739 return;
2740
2741 p = &fb_display[vc->vc_num];
2742 set_blitting_type(vc, info, p);
2743
2744 if (CON_IS_VISIBLE(vc)) {
2745 var_to_display(p, &info->var, info);
2746 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2747 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2748 cols /= vc->vc_font.width;
2749 rows /= vc->vc_font.height;
2750 vc_resize(vc, cols, rows);
2751 updatescrollmode(p, info, vc);
2752 scrollback_max = 0;
2753 scrollback_current = 0;
2754
2755 if (!fbcon_is_inactive(vc, info)) {
2756 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2757 ops->update_start(info);
2758 }
2759
2760 fbcon_set_palette(vc, color_table);
2761 update_screen(vc);
2762 if (softback_buf)
2763 fbcon_update_softback(vc);
2764 }
2765 }
2766
2767 static void fbcon_set_all_vcs(struct fb_info *info)
2768 {
2769 struct fbcon_ops *ops = info->fbcon_par;
2770 struct vc_data *vc;
2771 struct display *p;
2772 int i, rows, cols;
2773
2774 if (!ops || ops->currcon < 0)
2775 return;
2776
2777 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2778 vc = vc_cons[i].d;
2779 if (!vc || vc->vc_mode != KD_TEXT ||
2780 registered_fb[con2fb_map[i]] != info)
2781 continue;
2782
2783 p = &fb_display[vc->vc_num];
2784 set_blitting_type(vc, info, p);
2785 var_to_display(p, &info->var, info);
2786 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2787 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2788 cols /= vc->vc_font.width;
2789 rows /= vc->vc_font.height;
2790 vc_resize(vc, cols, rows);
2791
2792 if (CON_IS_VISIBLE(vc)) {
2793 updatescrollmode(p, info, vc);
2794 scrollback_max = 0;
2795 scrollback_current = 0;
2796
2797 if (!fbcon_is_inactive(vc, info)) {
2798 ops->var.xoffset = ops->var.yoffset =
2799 p->yscroll = 0;
2800 ops->update_start(info);
2801 }
2802
2803 fbcon_set_palette(vc, color_table);
2804 update_screen(vc);
2805 if (softback_buf)
2806 fbcon_update_softback(vc);
2807 }
2808 }
2809 }
2810
2811 static int fbcon_mode_deleted(struct fb_info *info,
2812 struct fb_videomode *mode)
2813 {
2814 struct fb_info *fb_info;
2815 struct display *p;
2816 int i, j, found = 0;
2817
2818 /* before deletion, ensure that mode is not in use */
2819 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2820 j = con2fb_map[i];
2821 if (j == -1)
2822 continue;
2823 fb_info = registered_fb[j];
2824 if (fb_info != info)
2825 continue;
2826 p = &fb_display[i];
2827 if (!p || !p->mode)
2828 continue;
2829 if (fb_mode_is_equal(p->mode, mode)) {
2830 found = 1;
2831 break;
2832 }
2833 }
2834 return found;
2835 }
2836
2837 static int fbcon_fb_registered(int idx)
2838 {
2839 int ret = 0, i;
2840
2841 if (info_idx == -1) {
2842 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2843 if (con2fb_map_boot[i] == idx) {
2844 info_idx = idx;
2845 break;
2846 }
2847 }
2848 if (info_idx != -1)
2849 ret = fbcon_takeover(1);
2850 } else {
2851 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2852 if (con2fb_map_boot[i] == idx)
2853 set_con2fb_map(i, idx, 0);
2854 }
2855 }
2856
2857 return ret;
2858 }
2859
2860 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2861 {
2862 struct fbcon_ops *ops = info->fbcon_par;
2863 struct vc_data *vc;
2864
2865 if (!ops || ops->currcon < 0)
2866 return;
2867
2868 vc = vc_cons[ops->currcon].d;
2869 if (vc->vc_mode != KD_TEXT ||
2870 registered_fb[con2fb_map[ops->currcon]] != info)
2871 return;
2872
2873 if (CON_IS_VISIBLE(vc)) {
2874 if (blank)
2875 do_blank_screen(0);
2876 else
2877 do_unblank_screen(0);
2878 }
2879 ops->blank_state = blank;
2880 }
2881
2882 static void fbcon_new_modelist(struct fb_info *info)
2883 {
2884 int i;
2885 struct vc_data *vc;
2886 struct fb_var_screeninfo var;
2887 struct fb_videomode *mode;
2888
2889 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2890 if (registered_fb[con2fb_map[i]] != info)
2891 continue;
2892 if (!fb_display[i].mode)
2893 continue;
2894 vc = vc_cons[i].d;
2895 display_to_var(&var, &fb_display[i]);
2896 mode = fb_find_nearest_mode(fb_display[i].mode,
2897 &info->modelist);
2898 fb_videomode_to_var(&var, mode);
2899
2900 if (vc)
2901 fbcon_set_disp(info, &var, vc);
2902 else
2903 fbcon_preset_disp(info, &var, i);
2904
2905 }
2906 }
2907
2908 static int fbcon_event_notify(struct notifier_block *self,
2909 unsigned long action, void *data)
2910 {
2911 struct fb_event *event = data;
2912 struct fb_info *info = event->info;
2913 struct fb_videomode *mode;
2914 struct fb_con2fbmap *con2fb;
2915 int ret = 0;
2916
2917 switch(action) {
2918 case FB_EVENT_SUSPEND:
2919 fbcon_suspended(info);
2920 break;
2921 case FB_EVENT_RESUME:
2922 fbcon_resumed(info);
2923 break;
2924 case FB_EVENT_MODE_CHANGE:
2925 fbcon_modechanged(info);
2926 break;
2927 case FB_EVENT_MODE_CHANGE_ALL:
2928 fbcon_set_all_vcs(info);
2929 break;
2930 case FB_EVENT_MODE_DELETE:
2931 mode = event->data;
2932 ret = fbcon_mode_deleted(info, mode);
2933 break;
2934 case FB_EVENT_FB_REGISTERED:
2935 ret = fbcon_fb_registered(info->node);
2936 break;
2937 case FB_EVENT_SET_CONSOLE_MAP:
2938 con2fb = event->data;
2939 ret = set_con2fb_map(con2fb->console - 1,
2940 con2fb->framebuffer, 1);
2941 break;
2942 case FB_EVENT_GET_CONSOLE_MAP:
2943 con2fb = event->data;
2944 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2945 break;
2946 case FB_EVENT_BLANK:
2947 fbcon_fb_blanked(info, *(int *)event->data);
2948 break;
2949 case FB_EVENT_NEW_MODELIST:
2950 fbcon_new_modelist(info);
2951 break;
2952 case FB_EVENT_SET_CON_ROTATE:
2953 fbcon_rotate(info, *(int *)event->data);
2954 break;
2955 case FB_EVENT_GET_CON_ROTATE:
2956 ret = fbcon_get_rotate(info);
2957 break;
2958 case FB_EVENT_SET_CON_ROTATE_ALL:
2959 fbcon_rotate_all(info, *(int *)event->data);
2960 }
2961
2962 return ret;
2963 }
2964
2965 /*
2966 * The console `switch' structure for the frame buffer based console
2967 */
2968
2969 static const struct consw fb_con = {
2970 .owner = THIS_MODULE,
2971 .con_startup = fbcon_startup,
2972 .con_init = fbcon_init,
2973 .con_deinit = fbcon_deinit,
2974 .con_clear = fbcon_clear,
2975 .con_putc = fbcon_putc,
2976 .con_putcs = fbcon_putcs,
2977 .con_cursor = fbcon_cursor,
2978 .con_scroll = fbcon_scroll,
2979 .con_bmove = fbcon_bmove,
2980 .con_switch = fbcon_switch,
2981 .con_blank = fbcon_blank,
2982 .con_font_set = fbcon_set_font,
2983 .con_font_get = fbcon_get_font,
2984 .con_font_default = fbcon_set_def_font,
2985 .con_font_copy = fbcon_copy_font,
2986 .con_set_palette = fbcon_set_palette,
2987 .con_scrolldelta = fbcon_scrolldelta,
2988 .con_set_origin = fbcon_set_origin,
2989 .con_invert_region = fbcon_invert_region,
2990 .con_screen_pos = fbcon_screen_pos,
2991 .con_getxy = fbcon_getxy,
2992 .con_resize = fbcon_resize,
2993 };
2994
2995 static struct notifier_block fbcon_event_notifier = {
2996 .notifier_call = fbcon_event_notify,
2997 };
2998
2999 static int __init fb_console_init(void)
3000 {
3001 int i;
3002
3003 acquire_console_sem();
3004 fb_register_client(&fbcon_event_notifier);
3005 release_console_sem();
3006
3007 for (i = 0; i < MAX_NR_CONSOLES; i++)
3008 con2fb_map[i] = -1;
3009
3010 if (num_registered_fb) {
3011 for (i = 0; i < FB_MAX; i++) {
3012 if (registered_fb[i] != NULL) {
3013 info_idx = i;
3014 break;
3015 }
3016 }
3017 fbcon_takeover(0);
3018 }
3019
3020 return 0;
3021 }
3022
3023 module_init(fb_console_init);
3024
3025 #ifdef MODULE
3026
3027 static void __exit fb_console_exit(void)
3028 {
3029 acquire_console_sem();
3030 fb_unregister_client(&fbcon_event_notifier);
3031 release_console_sem();
3032 give_up_console(&fb_con);
3033 }
3034
3035 module_exit(fb_console_exit);
3036
3037 #endif
3038
3039 MODULE_LICENSE("GPL");
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