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[PATCH] VT binding: Update fbcon to support binding
[deliverable/linux.git] / drivers / video / console / fbcon.c
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 static int fbcon_has_exited;
129
130 /* font data */
131 static char fontname[40];
132
133 /* current fb_info */
134 static int info_idx = -1;
135
136 /* console rotation */
137 static int rotate;
138
139 static const struct consw fb_con;
140
141 #define CM_SOFTBACK (8)
142
143 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
144
145 static int fbcon_set_origin(struct vc_data *);
146
147 #define CURSOR_DRAW_DELAY (1)
148
149 /* # VBL ints between cursor state changes */
150 #define ATARI_CURSOR_BLINK_RATE (42)
151 #define MAC_CURSOR_BLINK_RATE (32)
152 #define DEFAULT_CURSOR_BLINK_RATE (20)
153
154 static int vbl_cursor_cnt;
155
156 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
157
158 /*
159 * Interface used by the world
160 */
161
162 static const char *fbcon_startup(void);
163 static void fbcon_init(struct vc_data *vc, int init);
164 static void fbcon_deinit(struct vc_data *vc);
165 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
166 int width);
167 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
168 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
169 int count, int ypos, int xpos);
170 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
171 static void fbcon_cursor(struct vc_data *vc, int mode);
172 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
173 int count);
174 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
175 int height, int width);
176 static int fbcon_switch(struct vc_data *vc);
177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
178 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
179 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
180
181 /*
182 * Internal routines
183 */
184 static __inline__ void ywrap_up(struct vc_data *vc, int count);
185 static __inline__ void ywrap_down(struct vc_data *vc, int count);
186 static __inline__ void ypan_up(struct vc_data *vc, int count);
187 static __inline__ void ypan_down(struct vc_data *vc, int count);
188 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
189 int dy, int dx, int height, int width, u_int y_break);
190 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
191 struct vc_data *vc);
192 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
193 int unit);
194 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
195 int line, int count, int dy);
196 static void fbcon_modechanged(struct fb_info *info);
197 static void fbcon_set_all_vcs(struct fb_info *info);
198 static void fbcon_start(void);
199 static void fbcon_exit(void);
200 static struct class_device *fbcon_class_device;
201
202 #ifdef CONFIG_MAC
203 /*
204 * On the Macintoy, there may or may not be a working VBL int. We need to probe
205 */
206 static int vbl_detected;
207
208 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
209 {
210 vbl_detected++;
211 return IRQ_HANDLED;
212 }
213 #endif
214
215 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
216 static inline void fbcon_set_rotation(struct fb_info *info)
217 {
218 struct fbcon_ops *ops = info->fbcon_par;
219
220 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
221 ops->p->con_rotate < 4)
222 ops->rotate = ops->p->con_rotate;
223 else
224 ops->rotate = 0;
225 }
226
227 static void fbcon_rotate(struct fb_info *info, u32 rotate)
228 {
229 struct fbcon_ops *ops= info->fbcon_par;
230 struct fb_info *fb_info;
231
232 if (!ops || ops->currcon == -1)
233 return;
234
235 fb_info = registered_fb[con2fb_map[ops->currcon]];
236
237 if (info == fb_info) {
238 struct display *p = &fb_display[ops->currcon];
239
240 if (rotate < 4)
241 p->con_rotate = rotate;
242 else
243 p->con_rotate = 0;
244
245 fbcon_modechanged(info);
246 }
247 }
248
249 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
250 {
251 struct fbcon_ops *ops = info->fbcon_par;
252 struct vc_data *vc;
253 struct display *p;
254 int i;
255
256 if (!ops || ops->currcon < 0 || rotate > 3)
257 return;
258
259 for (i = first_fb_vc; i <= last_fb_vc; i++) {
260 vc = vc_cons[i].d;
261 if (!vc || vc->vc_mode != KD_TEXT ||
262 registered_fb[con2fb_map[i]] != info)
263 continue;
264
265 p = &fb_display[vc->vc_num];
266 p->con_rotate = rotate;
267 }
268
269 fbcon_set_all_vcs(info);
270 }
271 #else
272 static inline void fbcon_set_rotation(struct fb_info *info)
273 {
274 struct fbcon_ops *ops = info->fbcon_par;
275
276 ops->rotate = FB_ROTATE_UR;
277 }
278
279 static void fbcon_rotate(struct fb_info *info, u32 rotate)
280 {
281 return;
282 }
283
284 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
285 {
286 return;
287 }
288 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
289
290 static int fbcon_get_rotate(struct fb_info *info)
291 {
292 struct fbcon_ops *ops = info->fbcon_par;
293
294 return (ops) ? ops->rotate : 0;
295 }
296
297 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
298 {
299 struct fbcon_ops *ops = info->fbcon_par;
300
301 return (info->state != FBINFO_STATE_RUNNING ||
302 vc->vc_mode != KD_TEXT || ops->graphics);
303 }
304
305 static inline int get_color(struct vc_data *vc, struct fb_info *info,
306 u16 c, int is_fg)
307 {
308 int depth = fb_get_color_depth(&info->var, &info->fix);
309 int color = 0;
310
311 if (console_blanked) {
312 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
313
314 c = vc->vc_video_erase_char & charmask;
315 }
316
317 if (depth != 1)
318 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
319 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
320
321 switch (depth) {
322 case 1:
323 {
324 int col = ~(0xfff << (max(info->var.green.length,
325 max(info->var.red.length,
326 info->var.blue.length)))) & 0xff;
327
328 /* 0 or 1 */
329 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
330 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
331
332 if (console_blanked)
333 fg = bg;
334
335 color = (is_fg) ? fg : bg;
336 break;
337 }
338 case 2:
339 /*
340 * Scale down 16-colors to 4 colors. Default 4-color palette
341 * is grayscale. However, simply dividing the values by 4
342 * will not work, as colors 1, 2 and 3 will be scaled-down
343 * to zero rendering them invisible. So empirically convert
344 * colors to a sane 4-level grayscale.
345 */
346 switch (color) {
347 case 0:
348 color = 0; /* black */
349 break;
350 case 1 ... 6:
351 color = 2; /* white */
352 break;
353 case 7 ... 8:
354 color = 1; /* gray */
355 break;
356 default:
357 color = 3; /* intense white */
358 break;
359 }
360 break;
361 case 3:
362 /*
363 * Last 8 entries of default 16-color palette is a more intense
364 * version of the first 8 (i.e., same chrominance, different
365 * luminance).
366 */
367 color &= 7;
368 break;
369 }
370
371
372 return color;
373 }
374
375 static void fbcon_update_softback(struct vc_data *vc)
376 {
377 int l = fbcon_softback_size / vc->vc_size_row;
378
379 if (l > 5)
380 softback_end = softback_buf + l * vc->vc_size_row;
381 else
382 /* Smaller scrollback makes no sense, and 0 would screw
383 the operation totally */
384 softback_top = 0;
385 }
386
387 static void fb_flashcursor(void *private)
388 {
389 struct fb_info *info = private;
390 struct fbcon_ops *ops = info->fbcon_par;
391 struct display *p;
392 struct vc_data *vc = NULL;
393 int c;
394 int mode;
395
396 acquire_console_sem();
397 if (ops && ops->currcon != -1)
398 vc = vc_cons[ops->currcon].d;
399
400 if (!vc || !CON_IS_VISIBLE(vc) ||
401 fbcon_is_inactive(vc, info) ||
402 registered_fb[con2fb_map[vc->vc_num]] != info ||
403 vc_cons[ops->currcon].d->vc_deccm != 1) {
404 release_console_sem();
405 return;
406 }
407
408 p = &fb_display[vc->vc_num];
409 c = scr_readw((u16 *) vc->vc_pos);
410 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
411 CM_ERASE : CM_DRAW;
412 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
413 get_color(vc, info, c, 0));
414 release_console_sem();
415 }
416
417 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
418 static int cursor_blink_rate;
419 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
420 {
421 struct fb_info *info = dev_id;
422
423 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
424 schedule_work(&info->queue);
425 vbl_cursor_cnt = cursor_blink_rate;
426 }
427 return IRQ_HANDLED;
428 }
429 #endif
430
431 static void cursor_timer_handler(unsigned long dev_addr)
432 {
433 struct fb_info *info = (struct fb_info *) dev_addr;
434 struct fbcon_ops *ops = info->fbcon_par;
435
436 schedule_work(&info->queue);
437 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
438 }
439
440 static void fbcon_add_cursor_timer(struct fb_info *info)
441 {
442 struct fbcon_ops *ops = info->fbcon_par;
443
444 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
445 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
446 if (!info->queue.func)
447 INIT_WORK(&info->queue, fb_flashcursor, info);
448
449 init_timer(&ops->cursor_timer);
450 ops->cursor_timer.function = cursor_timer_handler;
451 ops->cursor_timer.expires = jiffies + HZ / 5;
452 ops->cursor_timer.data = (unsigned long ) info;
453 add_timer(&ops->cursor_timer);
454 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
455 }
456 }
457
458 static void fbcon_del_cursor_timer(struct fb_info *info)
459 {
460 struct fbcon_ops *ops = info->fbcon_par;
461
462 if (info->queue.func == fb_flashcursor &&
463 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
464 del_timer_sync(&ops->cursor_timer);
465 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
466 }
467 }
468
469 #ifndef MODULE
470 static int __init fb_console_setup(char *this_opt)
471 {
472 char *options;
473 int i, j;
474
475 if (!this_opt || !*this_opt)
476 return 1;
477
478 while ((options = strsep(&this_opt, ",")) != NULL) {
479 if (!strncmp(options, "font:", 5))
480 strcpy(fontname, options + 5);
481
482 if (!strncmp(options, "scrollback:", 11)) {
483 options += 11;
484 if (*options) {
485 fbcon_softback_size = simple_strtoul(options, &options, 0);
486 if (*options == 'k' || *options == 'K') {
487 fbcon_softback_size *= 1024;
488 options++;
489 }
490 if (*options != ',')
491 return 1;
492 options++;
493 } else
494 return 1;
495 }
496
497 if (!strncmp(options, "map:", 4)) {
498 options += 4;
499 if (*options)
500 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
501 if (!options[j])
502 j = 0;
503 con2fb_map_boot[i] =
504 (options[j++]-'0') % FB_MAX;
505 }
506 return 1;
507 }
508
509 if (!strncmp(options, "vc:", 3)) {
510 options += 3;
511 if (*options)
512 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
513 if (first_fb_vc < 0)
514 first_fb_vc = 0;
515 if (*options++ == '-')
516 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
517 fbcon_is_default = 0;
518 }
519
520 if (!strncmp(options, "rotate:", 7)) {
521 options += 7;
522 if (*options)
523 rotate = simple_strtoul(options, &options, 0);
524 if (rotate > 3)
525 rotate = 0;
526 }
527 }
528 return 1;
529 }
530
531 __setup("fbcon=", fb_console_setup);
532 #endif
533
534 static int search_fb_in_map(int idx)
535 {
536 int i, retval = 0;
537
538 for (i = first_fb_vc; i <= last_fb_vc; i++) {
539 if (con2fb_map[i] == idx)
540 retval = 1;
541 }
542 return retval;
543 }
544
545 static int search_for_mapped_con(void)
546 {
547 int i, retval = 0;
548
549 for (i = first_fb_vc; i <= last_fb_vc; i++) {
550 if (con2fb_map[i] != -1)
551 retval = 1;
552 }
553 return retval;
554 }
555
556 static int fbcon_takeover(int show_logo)
557 {
558 int err, i;
559
560 if (!num_registered_fb)
561 return -ENODEV;
562
563 if (!show_logo)
564 logo_shown = FBCON_LOGO_DONTSHOW;
565
566 for (i = first_fb_vc; i <= last_fb_vc; i++)
567 con2fb_map[i] = info_idx;
568
569 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
570 fbcon_is_default);
571
572 if (err) {
573 for (i = first_fb_vc; i <= last_fb_vc; i++) {
574 con2fb_map[i] = -1;
575 }
576 info_idx = -1;
577 }
578
579 return err;
580 }
581
582 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
583 int cols, int rows, int new_cols, int new_rows)
584 {
585 /* Need to make room for the logo */
586 struct fbcon_ops *ops = info->fbcon_par;
587 int cnt, erase = vc->vc_video_erase_char, step;
588 unsigned short *save = NULL, *r, *q;
589
590 /*
591 * remove underline attribute from erase character
592 * if black and white framebuffer.
593 */
594 if (fb_get_color_depth(&info->var, &info->fix) == 1)
595 erase &= ~0x400;
596 logo_height = fb_prepare_logo(info, ops->rotate);
597 logo_lines = (logo_height + vc->vc_font.height - 1) /
598 vc->vc_font.height;
599 q = (unsigned short *) (vc->vc_origin +
600 vc->vc_size_row * rows);
601 step = logo_lines * cols;
602 for (r = q - logo_lines * cols; r < q; r++)
603 if (scr_readw(r) != vc->vc_video_erase_char)
604 break;
605 if (r != q && new_rows >= rows + logo_lines) {
606 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
607 if (save) {
608 int i = cols < new_cols ? cols : new_cols;
609 scr_memsetw(save, erase, logo_lines * new_cols * 2);
610 r = q - step;
611 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
612 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
613 r = q;
614 }
615 }
616 if (r == q) {
617 /* We can scroll screen down */
618 r = q - step - cols;
619 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
620 scr_memcpyw(r + step, r, vc->vc_size_row);
621 r -= cols;
622 }
623 if (!save) {
624 vc->vc_y += logo_lines;
625 vc->vc_pos += logo_lines * vc->vc_size_row;
626 }
627 }
628 scr_memsetw((unsigned short *) vc->vc_origin,
629 erase,
630 vc->vc_size_row * logo_lines);
631
632 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
633 fbcon_clear_margins(vc, 0);
634 update_screen(vc);
635 }
636
637 if (save) {
638 q = (unsigned short *) (vc->vc_origin +
639 vc->vc_size_row *
640 rows);
641 scr_memcpyw(q, save, logo_lines * new_cols * 2);
642 vc->vc_y += logo_lines;
643 vc->vc_pos += logo_lines * vc->vc_size_row;
644 kfree(save);
645 }
646
647 if (logo_lines > vc->vc_bottom) {
648 logo_shown = FBCON_LOGO_CANSHOW;
649 printk(KERN_INFO
650 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
651 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
652 logo_shown = FBCON_LOGO_DRAW;
653 vc->vc_top = logo_lines;
654 }
655 }
656
657 #ifdef CONFIG_FB_TILEBLITTING
658 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
659 {
660 struct fbcon_ops *ops = info->fbcon_par;
661
662 ops->p = &fb_display[vc->vc_num];
663
664 if ((info->flags & FBINFO_MISC_TILEBLITTING))
665 fbcon_set_tileops(vc, info);
666 else {
667 fbcon_set_rotation(info);
668 fbcon_set_bitops(ops);
669 }
670 }
671 #else
672 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
673 {
674 struct fbcon_ops *ops = info->fbcon_par;
675
676 info->flags &= ~FBINFO_MISC_TILEBLITTING;
677 ops->p = &fb_display[vc->vc_num];
678 fbcon_set_rotation(info);
679 fbcon_set_bitops(ops);
680 }
681 #endif /* CONFIG_MISC_TILEBLITTING */
682
683
684 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
685 int unit, int oldidx)
686 {
687 struct fbcon_ops *ops = NULL;
688 int err = 0;
689
690 if (!try_module_get(info->fbops->owner))
691 err = -ENODEV;
692
693 if (!err && info->fbops->fb_open &&
694 info->fbops->fb_open(info, 0))
695 err = -ENODEV;
696
697 if (!err) {
698 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
699 if (!ops)
700 err = -ENOMEM;
701 }
702
703 if (!err) {
704 info->fbcon_par = ops;
705 set_blitting_type(vc, info);
706 }
707
708 if (err) {
709 con2fb_map[unit] = oldidx;
710 module_put(info->fbops->owner);
711 }
712
713 return err;
714 }
715
716 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
717 struct fb_info *newinfo, int unit,
718 int oldidx, int found)
719 {
720 struct fbcon_ops *ops = oldinfo->fbcon_par;
721 int err = 0;
722
723 if (oldinfo->fbops->fb_release &&
724 oldinfo->fbops->fb_release(oldinfo, 0)) {
725 con2fb_map[unit] = oldidx;
726 if (!found && newinfo->fbops->fb_release)
727 newinfo->fbops->fb_release(newinfo, 0);
728 if (!found)
729 module_put(newinfo->fbops->owner);
730 err = -ENODEV;
731 }
732
733 if (!err) {
734 fbcon_del_cursor_timer(oldinfo);
735 kfree(ops->cursor_state.mask);
736 kfree(ops->cursor_data);
737 kfree(ops->fontbuffer);
738 kfree(oldinfo->fbcon_par);
739 oldinfo->fbcon_par = NULL;
740 module_put(oldinfo->fbops->owner);
741 /*
742 If oldinfo and newinfo are driving the same hardware,
743 the fb_release() method of oldinfo may attempt to
744 restore the hardware state. This will leave the
745 newinfo in an undefined state. Thus, a call to
746 fb_set_par() may be needed for the newinfo.
747 */
748 if (newinfo->fbops->fb_set_par)
749 newinfo->fbops->fb_set_par(newinfo);
750 }
751
752 return err;
753 }
754
755 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
756 int unit, int show_logo)
757 {
758 struct fbcon_ops *ops = info->fbcon_par;
759
760 ops->currcon = fg_console;
761
762 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
763 info->fbops->fb_set_par(info);
764
765 ops->flags |= FBCON_FLAGS_INIT;
766 ops->graphics = 0;
767
768 if (vc)
769 fbcon_set_disp(info, &info->var, vc);
770 else
771 fbcon_preset_disp(info, &info->var, unit);
772
773 if (show_logo) {
774 struct vc_data *fg_vc = vc_cons[fg_console].d;
775 struct fb_info *fg_info =
776 registered_fb[con2fb_map[fg_console]];
777
778 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
779 fg_vc->vc_rows, fg_vc->vc_cols,
780 fg_vc->vc_rows);
781 }
782
783 update_screen(vc_cons[fg_console].d);
784 }
785
786 /**
787 * set_con2fb_map - map console to frame buffer device
788 * @unit: virtual console number to map
789 * @newidx: frame buffer index to map virtual console to
790 * @user: user request
791 *
792 * Maps a virtual console @unit to a frame buffer device
793 * @newidx.
794 */
795 static int set_con2fb_map(int unit, int newidx, int user)
796 {
797 struct vc_data *vc = vc_cons[unit].d;
798 int oldidx = con2fb_map[unit];
799 struct fb_info *info = registered_fb[newidx];
800 struct fb_info *oldinfo = NULL;
801 int found, err = 0;
802
803 if (oldidx == newidx)
804 return 0;
805
806 if (!info || fbcon_has_exited)
807 return -EINVAL;
808
809 if (!err && !search_for_mapped_con()) {
810 info_idx = newidx;
811 return fbcon_takeover(0);
812 }
813
814 if (oldidx != -1)
815 oldinfo = registered_fb[oldidx];
816
817 found = search_fb_in_map(newidx);
818
819 acquire_console_sem();
820 con2fb_map[unit] = newidx;
821 if (!err && !found)
822 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
823
824
825 /*
826 * If old fb is not mapped to any of the consoles,
827 * fbcon should release it.
828 */
829 if (!err && oldinfo && !search_fb_in_map(oldidx))
830 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
831 found);
832
833 if (!err) {
834 int show_logo = (fg_console == 0 && !user &&
835 logo_shown != FBCON_LOGO_DONTSHOW);
836
837 if (!found)
838 fbcon_add_cursor_timer(info);
839 con2fb_map_boot[unit] = newidx;
840 con2fb_init_display(vc, info, unit, show_logo);
841 }
842
843 if (!search_fb_in_map(info_idx))
844 info_idx = newidx;
845
846 release_console_sem();
847 return err;
848 }
849
850 /*
851 * Low Level Operations
852 */
853 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
854 static int var_to_display(struct display *disp,
855 struct fb_var_screeninfo *var,
856 struct fb_info *info)
857 {
858 disp->xres_virtual = var->xres_virtual;
859 disp->yres_virtual = var->yres_virtual;
860 disp->bits_per_pixel = var->bits_per_pixel;
861 disp->grayscale = var->grayscale;
862 disp->nonstd = var->nonstd;
863 disp->accel_flags = var->accel_flags;
864 disp->height = var->height;
865 disp->width = var->width;
866 disp->red = var->red;
867 disp->green = var->green;
868 disp->blue = var->blue;
869 disp->transp = var->transp;
870 disp->rotate = var->rotate;
871 disp->mode = fb_match_mode(var, &info->modelist);
872 if (disp->mode == NULL)
873 /* This should not happen */
874 return -EINVAL;
875 return 0;
876 }
877
878 static void display_to_var(struct fb_var_screeninfo *var,
879 struct display *disp)
880 {
881 fb_videomode_to_var(var, disp->mode);
882 var->xres_virtual = disp->xres_virtual;
883 var->yres_virtual = disp->yres_virtual;
884 var->bits_per_pixel = disp->bits_per_pixel;
885 var->grayscale = disp->grayscale;
886 var->nonstd = disp->nonstd;
887 var->accel_flags = disp->accel_flags;
888 var->height = disp->height;
889 var->width = disp->width;
890 var->red = disp->red;
891 var->green = disp->green;
892 var->blue = disp->blue;
893 var->transp = disp->transp;
894 var->rotate = disp->rotate;
895 }
896
897 static const char *fbcon_startup(void)
898 {
899 const char *display_desc = "frame buffer device";
900 struct display *p = &fb_display[fg_console];
901 struct vc_data *vc = vc_cons[fg_console].d;
902 const struct font_desc *font = NULL;
903 struct module *owner;
904 struct fb_info *info = NULL;
905 struct fbcon_ops *ops;
906 int rows, cols;
907 int irqres;
908
909 irqres = 1;
910 /*
911 * If num_registered_fb is zero, this is a call for the dummy part.
912 * The frame buffer devices weren't initialized yet.
913 */
914 if (!num_registered_fb || info_idx == -1)
915 return display_desc;
916 /*
917 * Instead of blindly using registered_fb[0], we use info_idx, set by
918 * fb_console_init();
919 */
920 info = registered_fb[info_idx];
921 if (!info)
922 return NULL;
923
924 owner = info->fbops->owner;
925 if (!try_module_get(owner))
926 return NULL;
927 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
928 module_put(owner);
929 return NULL;
930 }
931
932 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
933 if (!ops) {
934 module_put(owner);
935 return NULL;
936 }
937
938 ops->currcon = -1;
939 ops->graphics = 1;
940 ops->cur_rotate = -1;
941 info->fbcon_par = ops;
942 p->con_rotate = rotate;
943 set_blitting_type(vc, info);
944
945 if (info->fix.type != FB_TYPE_TEXT) {
946 if (fbcon_softback_size) {
947 if (!softback_buf) {
948 softback_buf =
949 (unsigned long)
950 kmalloc(fbcon_softback_size,
951 GFP_KERNEL);
952 if (!softback_buf) {
953 fbcon_softback_size = 0;
954 softback_top = 0;
955 }
956 }
957 } else {
958 if (softback_buf) {
959 kfree((void *) softback_buf);
960 softback_buf = 0;
961 softback_top = 0;
962 }
963 }
964 if (softback_buf)
965 softback_in = softback_top = softback_curr =
966 softback_buf;
967 softback_lines = 0;
968 }
969
970 /* Setup default font */
971 if (!p->fontdata) {
972 if (!fontname[0] || !(font = find_font(fontname)))
973 font = get_default_font(info->var.xres,
974 info->var.yres);
975 vc->vc_font.width = font->width;
976 vc->vc_font.height = font->height;
977 vc->vc_font.data = (void *)(p->fontdata = font->data);
978 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
979 }
980
981 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
982 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
983 cols /= vc->vc_font.width;
984 rows /= vc->vc_font.height;
985 vc_resize(vc, cols, rows);
986
987 DPRINTK("mode: %s\n", info->fix.id);
988 DPRINTK("visual: %d\n", info->fix.visual);
989 DPRINTK("res: %dx%d-%d\n", info->var.xres,
990 info->var.yres,
991 info->var.bits_per_pixel);
992
993 #ifdef CONFIG_ATARI
994 if (MACH_IS_ATARI) {
995 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
996 irqres =
997 request_irq(IRQ_AUTO_4, fb_vbl_handler,
998 IRQ_TYPE_PRIO, "framebuffer vbl",
999 info);
1000 }
1001 #endif /* CONFIG_ATARI */
1002
1003 #ifdef CONFIG_MAC
1004 /*
1005 * On a Macintoy, the VBL interrupt may or may not be active.
1006 * As interrupt based cursor is more reliable and race free, we
1007 * probe for VBL interrupts.
1008 */
1009 if (MACH_IS_MAC) {
1010 int ct = 0;
1011 /*
1012 * Probe for VBL: set temp. handler ...
1013 */
1014 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1015 "framebuffer vbl", info);
1016 vbl_detected = 0;
1017
1018 /*
1019 * ... and spin for 20 ms ...
1020 */
1021 while (!vbl_detected && ++ct < 1000)
1022 udelay(20);
1023
1024 if (ct == 1000)
1025 printk
1026 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1027
1028 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1029
1030 if (vbl_detected) {
1031 /*
1032 * interrupt based cursor ok
1033 */
1034 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1035 irqres =
1036 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1037 "framebuffer vbl", info);
1038 } else {
1039 /*
1040 * VBL not detected: fall through, use timer based cursor
1041 */
1042 irqres = 1;
1043 }
1044 }
1045 #endif /* CONFIG_MAC */
1046
1047 fbcon_add_cursor_timer(info);
1048 fbcon_has_exited = 0;
1049 return display_desc;
1050 }
1051
1052 static void fbcon_init(struct vc_data *vc, int init)
1053 {
1054 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1055 struct fbcon_ops *ops;
1056 struct vc_data **default_mode = vc->vc_display_fg;
1057 struct vc_data *svc = *default_mode;
1058 struct display *t, *p = &fb_display[vc->vc_num];
1059 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1060 int cap;
1061
1062 if (info_idx == -1 || info == NULL)
1063 return;
1064
1065 cap = info->flags;
1066
1067 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1068 (info->fix.type == FB_TYPE_TEXT))
1069 logo = 0;
1070
1071 if (var_to_display(p, &info->var, info))
1072 return;
1073
1074 /* If we are not the first console on this
1075 fb, copy the font from that console */
1076 t = &fb_display[fg_console];
1077 if (!p->fontdata) {
1078 if (t->fontdata) {
1079 struct vc_data *fvc = vc_cons[fg_console].d;
1080
1081 vc->vc_font.data = (void *)(p->fontdata =
1082 fvc->vc_font.data);
1083 vc->vc_font.width = fvc->vc_font.width;
1084 vc->vc_font.height = fvc->vc_font.height;
1085 p->userfont = t->userfont;
1086
1087 if (p->userfont)
1088 REFCOUNT(p->fontdata)++;
1089 } else {
1090 const struct font_desc *font = NULL;
1091
1092 if (!fontname[0] || !(font = find_font(fontname)))
1093 font = get_default_font(info->var.xres,
1094 info->var.yres);
1095 vc->vc_font.width = font->width;
1096 vc->vc_font.height = font->height;
1097 vc->vc_font.data = (void *)(p->fontdata = font->data);
1098 vc->vc_font.charcount = 256; /* FIXME Need to
1099 support more fonts */
1100 }
1101 }
1102
1103 if (p->userfont)
1104 charcnt = FNTCHARCNT(p->fontdata);
1105
1106 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1107 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1108 if (charcnt == 256) {
1109 vc->vc_hi_font_mask = 0;
1110 } else {
1111 vc->vc_hi_font_mask = 0x100;
1112 if (vc->vc_can_do_color)
1113 vc->vc_complement_mask <<= 1;
1114 }
1115
1116 if (!*svc->vc_uni_pagedir_loc)
1117 con_set_default_unimap(svc);
1118 if (!*vc->vc_uni_pagedir_loc)
1119 con_copy_unimap(vc, svc);
1120
1121 ops = info->fbcon_par;
1122 p->con_rotate = rotate;
1123 set_blitting_type(vc, info);
1124
1125 cols = vc->vc_cols;
1126 rows = vc->vc_rows;
1127 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1128 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1129 new_cols /= vc->vc_font.width;
1130 new_rows /= vc->vc_font.height;
1131 vc_resize(vc, new_cols, new_rows);
1132
1133 /*
1134 * We must always set the mode. The mode of the previous console
1135 * driver could be in the same resolution but we are using different
1136 * hardware so we have to initialize the hardware.
1137 *
1138 * We need to do it in fbcon_init() to prevent screen corruption.
1139 */
1140 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1141 if (info->fbops->fb_set_par &&
1142 !(ops->flags & FBCON_FLAGS_INIT))
1143 info->fbops->fb_set_par(info);
1144 ops->flags |= FBCON_FLAGS_INIT;
1145 }
1146
1147 ops->graphics = 0;
1148
1149 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1150 !(cap & FBINFO_HWACCEL_DISABLED))
1151 p->scrollmode = SCROLL_MOVE;
1152 else /* default to something safe */
1153 p->scrollmode = SCROLL_REDRAW;
1154
1155 /*
1156 * ++guenther: console.c:vc_allocate() relies on initializing
1157 * vc_{cols,rows}, but we must not set those if we are only
1158 * resizing the console.
1159 */
1160 if (!init) {
1161 vc->vc_cols = new_cols;
1162 vc->vc_rows = new_rows;
1163 }
1164
1165 if (logo)
1166 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1167
1168 if (vc == svc && softback_buf)
1169 fbcon_update_softback(vc);
1170
1171 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1172 ops->rotate = FB_ROTATE_UR;
1173 set_blitting_type(vc, info);
1174 }
1175
1176 ops->p = &fb_display[fg_console];
1177 }
1178
1179 static void fbcon_free_font(struct display *p)
1180 {
1181 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1182 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1183 p->fontdata = NULL;
1184 p->userfont = 0;
1185 }
1186
1187 static void fbcon_deinit(struct vc_data *vc)
1188 {
1189 struct display *p = &fb_display[vc->vc_num];
1190 struct fb_info *info;
1191 struct fbcon_ops *ops;
1192 int idx;
1193
1194 fbcon_free_font(p);
1195 idx = con2fb_map[vc->vc_num];
1196
1197 if (idx == -1)
1198 goto finished;
1199
1200 info = registered_fb[idx];
1201
1202 if (!info)
1203 goto finished;
1204
1205 ops = info->fbcon_par;
1206
1207 if (!ops)
1208 goto finished;
1209
1210 if (CON_IS_VISIBLE(vc))
1211 fbcon_del_cursor_timer(info);
1212
1213 ops->flags &= ~FBCON_FLAGS_INIT;
1214 finished:
1215
1216 if (!con_is_bound(&fb_con))
1217 fbcon_exit();
1218
1219 return;
1220 }
1221
1222 /* ====================================================================== */
1223
1224 /* fbcon_XXX routines - interface used by the world
1225 *
1226 * This system is now divided into two levels because of complications
1227 * caused by hardware scrolling. Top level functions:
1228 *
1229 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1230 *
1231 * handles y values in range [0, scr_height-1] that correspond to real
1232 * screen positions. y_wrap shift means that first line of bitmap may be
1233 * anywhere on this display. These functions convert lineoffsets to
1234 * bitmap offsets and deal with the wrap-around case by splitting blits.
1235 *
1236 * fbcon_bmove_physical_8() -- These functions fast implementations
1237 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1238 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1239 *
1240 * WARNING:
1241 *
1242 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1243 * Implies should only really hardware scroll in rows. Only reason for
1244 * restriction is simplicity & efficiency at the moment.
1245 */
1246
1247 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1248 int width)
1249 {
1250 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1251 struct fbcon_ops *ops = info->fbcon_par;
1252
1253 struct display *p = &fb_display[vc->vc_num];
1254 u_int y_break;
1255
1256 if (fbcon_is_inactive(vc, info))
1257 return;
1258
1259 if (!height || !width)
1260 return;
1261
1262 /* Split blits that cross physical y_wrap boundary */
1263
1264 y_break = p->vrows - p->yscroll;
1265 if (sy < y_break && sy + height - 1 >= y_break) {
1266 u_int b = y_break - sy;
1267 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1268 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1269 width);
1270 } else
1271 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1272 }
1273
1274 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1275 int count, int ypos, int xpos)
1276 {
1277 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1278 struct display *p = &fb_display[vc->vc_num];
1279 struct fbcon_ops *ops = info->fbcon_par;
1280
1281 if (!fbcon_is_inactive(vc, info))
1282 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1283 get_color(vc, info, scr_readw(s), 1),
1284 get_color(vc, info, scr_readw(s), 0));
1285 }
1286
1287 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1288 {
1289 unsigned short chr;
1290
1291 scr_writew(c, &chr);
1292 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1293 }
1294
1295 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1296 {
1297 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1298 struct fbcon_ops *ops = info->fbcon_par;
1299
1300 if (!fbcon_is_inactive(vc, info))
1301 ops->clear_margins(vc, info, bottom_only);
1302 }
1303
1304 static void fbcon_cursor(struct vc_data *vc, int mode)
1305 {
1306 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1307 struct fbcon_ops *ops = info->fbcon_par;
1308 int y;
1309 int c = scr_readw((u16 *) vc->vc_pos);
1310
1311 if (fbcon_is_inactive(vc, info))
1312 return;
1313
1314 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1315 if (mode & CM_SOFTBACK) {
1316 mode &= ~CM_SOFTBACK;
1317 y = softback_lines;
1318 } else {
1319 if (softback_lines)
1320 fbcon_set_origin(vc);
1321 y = 0;
1322 }
1323
1324 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1325 get_color(vc, info, c, 0));
1326 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1327 }
1328
1329 static int scrollback_phys_max = 0;
1330 static int scrollback_max = 0;
1331 static int scrollback_current = 0;
1332
1333 /*
1334 * If no vc is existent yet, just set struct display
1335 */
1336 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1337 int unit)
1338 {
1339 struct display *p = &fb_display[unit];
1340 struct display *t = &fb_display[fg_console];
1341
1342 if (var_to_display(p, var, info))
1343 return;
1344
1345 p->fontdata = t->fontdata;
1346 p->userfont = t->userfont;
1347 if (p->userfont)
1348 REFCOUNT(p->fontdata)++;
1349 }
1350
1351 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1352 struct vc_data *vc)
1353 {
1354 struct display *p = &fb_display[vc->vc_num], *t;
1355 struct vc_data **default_mode = vc->vc_display_fg;
1356 struct vc_data *svc = *default_mode;
1357 struct fbcon_ops *ops = info->fbcon_par;
1358 int rows, cols, charcnt = 256;
1359
1360 if (var_to_display(p, var, info))
1361 return;
1362 t = &fb_display[svc->vc_num];
1363 if (!vc->vc_font.data) {
1364 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1365 vc->vc_font.width = (*default_mode)->vc_font.width;
1366 vc->vc_font.height = (*default_mode)->vc_font.height;
1367 p->userfont = t->userfont;
1368 if (p->userfont)
1369 REFCOUNT(p->fontdata)++;
1370 }
1371 if (p->userfont)
1372 charcnt = FNTCHARCNT(p->fontdata);
1373
1374 var->activate = FB_ACTIVATE_NOW;
1375 info->var.activate = var->activate;
1376 var->yoffset = info->var.yoffset;
1377 var->xoffset = info->var.xoffset;
1378 fb_set_var(info, var);
1379 ops->var = info->var;
1380 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1381 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1382 if (charcnt == 256) {
1383 vc->vc_hi_font_mask = 0;
1384 } else {
1385 vc->vc_hi_font_mask = 0x100;
1386 if (vc->vc_can_do_color)
1387 vc->vc_complement_mask <<= 1;
1388 }
1389
1390 if (!*svc->vc_uni_pagedir_loc)
1391 con_set_default_unimap(svc);
1392 if (!*vc->vc_uni_pagedir_loc)
1393 con_copy_unimap(vc, svc);
1394
1395 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1396 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1397 cols /= vc->vc_font.width;
1398 rows /= vc->vc_font.height;
1399 vc_resize(vc, cols, rows);
1400
1401 if (CON_IS_VISIBLE(vc)) {
1402 update_screen(vc);
1403 if (softback_buf)
1404 fbcon_update_softback(vc);
1405 }
1406 }
1407
1408 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1409 {
1410 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1411 struct fbcon_ops *ops = info->fbcon_par;
1412 struct display *p = &fb_display[vc->vc_num];
1413
1414 p->yscroll += count;
1415 if (p->yscroll >= p->vrows) /* Deal with wrap */
1416 p->yscroll -= p->vrows;
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);
1421 scrollback_max += count;
1422 if (scrollback_max > scrollback_phys_max)
1423 scrollback_max = scrollback_phys_max;
1424 scrollback_current = 0;
1425 }
1426
1427 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1428 {
1429 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1430 struct fbcon_ops *ops = info->fbcon_par;
1431 struct display *p = &fb_display[vc->vc_num];
1432
1433 p->yscroll -= count;
1434 if (p->yscroll < 0) /* Deal with wrap */
1435 p->yscroll += p->vrows;
1436 ops->var.xoffset = 0;
1437 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1438 ops->var.vmode |= FB_VMODE_YWRAP;
1439 ops->update_start(info);
1440 scrollback_max -= count;
1441 if (scrollback_max < 0)
1442 scrollback_max = 0;
1443 scrollback_current = 0;
1444 }
1445
1446 static __inline__ void ypan_up(struct vc_data *vc, int count)
1447 {
1448 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1449 struct display *p = &fb_display[vc->vc_num];
1450 struct fbcon_ops *ops = info->fbcon_par;
1451
1452 p->yscroll += count;
1453 if (p->yscroll > p->vrows - vc->vc_rows) {
1454 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1455 0, 0, 0, vc->vc_rows, vc->vc_cols);
1456 p->yscroll -= p->vrows - vc->vc_rows;
1457 }
1458
1459 ops->var.xoffset = 0;
1460 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1461 ops->var.vmode &= ~FB_VMODE_YWRAP;
1462 ops->update_start(info);
1463 fbcon_clear_margins(vc, 1);
1464 scrollback_max += count;
1465 if (scrollback_max > scrollback_phys_max)
1466 scrollback_max = scrollback_phys_max;
1467 scrollback_current = 0;
1468 }
1469
1470 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1471 {
1472 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1473 struct fbcon_ops *ops = info->fbcon_par;
1474 struct display *p = &fb_display[vc->vc_num];
1475
1476 p->yscroll += count;
1477
1478 if (p->yscroll > p->vrows - vc->vc_rows) {
1479 p->yscroll -= p->vrows - vc->vc_rows;
1480 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1481 }
1482
1483 ops->var.xoffset = 0;
1484 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1485 ops->var.vmode &= ~FB_VMODE_YWRAP;
1486 ops->update_start(info);
1487 fbcon_clear_margins(vc, 1);
1488 scrollback_max += count;
1489 if (scrollback_max > scrollback_phys_max)
1490 scrollback_max = scrollback_phys_max;
1491 scrollback_current = 0;
1492 }
1493
1494 static __inline__ void ypan_down(struct vc_data *vc, int count)
1495 {
1496 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1497 struct display *p = &fb_display[vc->vc_num];
1498 struct fbcon_ops *ops = info->fbcon_par;
1499
1500 p->yscroll -= count;
1501 if (p->yscroll < 0) {
1502 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1503 0, vc->vc_rows, vc->vc_cols);
1504 p->yscroll += p->vrows - vc->vc_rows;
1505 }
1506
1507 ops->var.xoffset = 0;
1508 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1509 ops->var.vmode &= ~FB_VMODE_YWRAP;
1510 ops->update_start(info);
1511 fbcon_clear_margins(vc, 1);
1512 scrollback_max -= count;
1513 if (scrollback_max < 0)
1514 scrollback_max = 0;
1515 scrollback_current = 0;
1516 }
1517
1518 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1519 {
1520 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1521 struct fbcon_ops *ops = info->fbcon_par;
1522 struct display *p = &fb_display[vc->vc_num];
1523
1524 p->yscroll -= count;
1525
1526 if (p->yscroll < 0) {
1527 p->yscroll += p->vrows - vc->vc_rows;
1528 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1529 }
1530
1531 ops->var.xoffset = 0;
1532 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1533 ops->var.vmode &= ~FB_VMODE_YWRAP;
1534 ops->update_start(info);
1535 fbcon_clear_margins(vc, 1);
1536 scrollback_max -= count;
1537 if (scrollback_max < 0)
1538 scrollback_max = 0;
1539 scrollback_current = 0;
1540 }
1541
1542 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1543 long delta)
1544 {
1545 int count = vc->vc_rows;
1546 unsigned short *d, *s;
1547 unsigned long n;
1548 int line = 0;
1549
1550 d = (u16 *) softback_curr;
1551 if (d == (u16 *) softback_in)
1552 d = (u16 *) vc->vc_origin;
1553 n = softback_curr + delta * vc->vc_size_row;
1554 softback_lines -= delta;
1555 if (delta < 0) {
1556 if (softback_curr < softback_top && n < softback_buf) {
1557 n += softback_end - softback_buf;
1558 if (n < softback_top) {
1559 softback_lines -=
1560 (softback_top - n) / vc->vc_size_row;
1561 n = softback_top;
1562 }
1563 } else if (softback_curr >= softback_top
1564 && n < softback_top) {
1565 softback_lines -=
1566 (softback_top - n) / vc->vc_size_row;
1567 n = softback_top;
1568 }
1569 } else {
1570 if (softback_curr > softback_in && n >= softback_end) {
1571 n += softback_buf - softback_end;
1572 if (n > softback_in) {
1573 n = softback_in;
1574 softback_lines = 0;
1575 }
1576 } else if (softback_curr <= softback_in && n > softback_in) {
1577 n = softback_in;
1578 softback_lines = 0;
1579 }
1580 }
1581 if (n == softback_curr)
1582 return;
1583 softback_curr = n;
1584 s = (u16 *) softback_curr;
1585 if (s == (u16 *) softback_in)
1586 s = (u16 *) vc->vc_origin;
1587 while (count--) {
1588 unsigned short *start;
1589 unsigned short *le;
1590 unsigned short c;
1591 int x = 0;
1592 unsigned short attr = 1;
1593
1594 start = s;
1595 le = advance_row(s, 1);
1596 do {
1597 c = scr_readw(s);
1598 if (attr != (c & 0xff00)) {
1599 attr = c & 0xff00;
1600 if (s > start) {
1601 fbcon_putcs(vc, start, s - start,
1602 line, x);
1603 x += s - start;
1604 start = s;
1605 }
1606 }
1607 if (c == scr_readw(d)) {
1608 if (s > start) {
1609 fbcon_putcs(vc, start, s - start,
1610 line, x);
1611 x += s - start + 1;
1612 start = s + 1;
1613 } else {
1614 x++;
1615 start++;
1616 }
1617 }
1618 s++;
1619 d++;
1620 } while (s < le);
1621 if (s > start)
1622 fbcon_putcs(vc, start, s - start, line, x);
1623 line++;
1624 if (d == (u16 *) softback_end)
1625 d = (u16 *) softback_buf;
1626 if (d == (u16 *) softback_in)
1627 d = (u16 *) vc->vc_origin;
1628 if (s == (u16 *) softback_end)
1629 s = (u16 *) softback_buf;
1630 if (s == (u16 *) softback_in)
1631 s = (u16 *) vc->vc_origin;
1632 }
1633 }
1634
1635 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1636 int line, int count, int dy)
1637 {
1638 unsigned short *s = (unsigned short *)
1639 (vc->vc_origin + vc->vc_size_row * line);
1640
1641 while (count--) {
1642 unsigned short *start = s;
1643 unsigned short *le = advance_row(s, 1);
1644 unsigned short c;
1645 int x = 0;
1646 unsigned short attr = 1;
1647
1648 do {
1649 c = scr_readw(s);
1650 if (attr != (c & 0xff00)) {
1651 attr = c & 0xff00;
1652 if (s > start) {
1653 fbcon_putcs(vc, start, s - start,
1654 dy, x);
1655 x += s - start;
1656 start = s;
1657 }
1658 }
1659 console_conditional_schedule();
1660 s++;
1661 } while (s < le);
1662 if (s > start)
1663 fbcon_putcs(vc, start, s - start, dy, x);
1664 console_conditional_schedule();
1665 dy++;
1666 }
1667 }
1668
1669 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1670 int line, int count, int offset)
1671 {
1672 unsigned short *d = (unsigned short *)
1673 (vc->vc_origin + vc->vc_size_row * line);
1674 unsigned short *s = d + offset;
1675
1676 while (count--) {
1677 unsigned short *start = s;
1678 unsigned short *le = advance_row(s, 1);
1679 unsigned short c;
1680 int x = 0;
1681 unsigned short attr = 1;
1682
1683 do {
1684 c = scr_readw(s);
1685 if (attr != (c & 0xff00)) {
1686 attr = c & 0xff00;
1687 if (s > start) {
1688 fbcon_putcs(vc, start, s - start,
1689 line, x);
1690 x += s - start;
1691 start = s;
1692 }
1693 }
1694 if (c == scr_readw(d)) {
1695 if (s > start) {
1696 fbcon_putcs(vc, start, s - start,
1697 line, x);
1698 x += s - start + 1;
1699 start = s + 1;
1700 } else {
1701 x++;
1702 start++;
1703 }
1704 }
1705 scr_writew(c, d);
1706 console_conditional_schedule();
1707 s++;
1708 d++;
1709 } while (s < le);
1710 if (s > start)
1711 fbcon_putcs(vc, start, s - start, line, x);
1712 console_conditional_schedule();
1713 if (offset > 0)
1714 line++;
1715 else {
1716 line--;
1717 /* NOTE: We subtract two lines from these pointers */
1718 s -= vc->vc_size_row;
1719 d -= vc->vc_size_row;
1720 }
1721 }
1722 }
1723
1724 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1725 int count)
1726 {
1727 unsigned short *p;
1728
1729 if (vc->vc_num != fg_console)
1730 return;
1731 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1732
1733 while (count) {
1734 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1735 count--;
1736 p = advance_row(p, 1);
1737 softback_in += vc->vc_size_row;
1738 if (softback_in == softback_end)
1739 softback_in = softback_buf;
1740 if (softback_in == softback_top) {
1741 softback_top += vc->vc_size_row;
1742 if (softback_top == softback_end)
1743 softback_top = softback_buf;
1744 }
1745 }
1746 softback_curr = softback_in;
1747 }
1748
1749 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1750 int count)
1751 {
1752 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1753 struct display *p = &fb_display[vc->vc_num];
1754 struct fbcon_ops *ops = info->fbcon_par;
1755 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1756
1757 if (fbcon_is_inactive(vc, info))
1758 return -EINVAL;
1759
1760 fbcon_cursor(vc, CM_ERASE);
1761
1762 /*
1763 * ++Geert: Only use ywrap/ypan if the console is in text mode
1764 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1765 * whole screen (prevents flicker).
1766 */
1767
1768 switch (dir) {
1769 case SM_UP:
1770 if (count > vc->vc_rows) /* Maximum realistic size */
1771 count = vc->vc_rows;
1772 if (softback_top)
1773 fbcon_softback_note(vc, t, count);
1774 if (logo_shown >= 0)
1775 goto redraw_up;
1776 switch (p->scrollmode) {
1777 case SCROLL_MOVE:
1778 ops->bmove(vc, info, t + count, 0, t, 0,
1779 b - t - count, vc->vc_cols);
1780 ops->clear(vc, info, b - count, 0, count,
1781 vc->vc_cols);
1782 break;
1783
1784 case SCROLL_WRAP_MOVE:
1785 if (b - t - count > 3 * vc->vc_rows >> 2) {
1786 if (t > 0)
1787 fbcon_bmove(vc, 0, 0, count, 0, t,
1788 vc->vc_cols);
1789 ywrap_up(vc, count);
1790 if (vc->vc_rows - b > 0)
1791 fbcon_bmove(vc, b - count, 0, b, 0,
1792 vc->vc_rows - b,
1793 vc->vc_cols);
1794 } else if (info->flags & FBINFO_READS_FAST)
1795 fbcon_bmove(vc, t + count, 0, t, 0,
1796 b - t - count, vc->vc_cols);
1797 else
1798 goto redraw_up;
1799 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1800 break;
1801
1802 case SCROLL_PAN_REDRAW:
1803 if ((p->yscroll + count <=
1804 2 * (p->vrows - vc->vc_rows))
1805 && ((!scroll_partial && (b - t == vc->vc_rows))
1806 || (scroll_partial
1807 && (b - t - count >
1808 3 * vc->vc_rows >> 2)))) {
1809 if (t > 0)
1810 fbcon_redraw_move(vc, p, 0, t, count);
1811 ypan_up_redraw(vc, t, count);
1812 if (vc->vc_rows - b > 0)
1813 fbcon_redraw_move(vc, p, b,
1814 vc->vc_rows - b, b);
1815 } else
1816 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1817 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1818 break;
1819
1820 case SCROLL_PAN_MOVE:
1821 if ((p->yscroll + count <=
1822 2 * (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 (t > 0)
1828 fbcon_bmove(vc, 0, 0, count, 0, t,
1829 vc->vc_cols);
1830 ypan_up(vc, count);
1831 if (vc->vc_rows - b > 0)
1832 fbcon_bmove(vc, b - count, 0, b, 0,
1833 vc->vc_rows - b,
1834 vc->vc_cols);
1835 } else if (info->flags & FBINFO_READS_FAST)
1836 fbcon_bmove(vc, t + count, 0, t, 0,
1837 b - t - count, vc->vc_cols);
1838 else
1839 goto redraw_up;
1840 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1841 break;
1842
1843 case SCROLL_REDRAW:
1844 redraw_up:
1845 fbcon_redraw(vc, p, t, b - t - count,
1846 count * vc->vc_cols);
1847 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1848 scr_memsetw((unsigned short *) (vc->vc_origin +
1849 vc->vc_size_row *
1850 (b - count)),
1851 vc->vc_video_erase_char,
1852 vc->vc_size_row * count);
1853 return 1;
1854 }
1855 break;
1856
1857 case SM_DOWN:
1858 if (count > vc->vc_rows) /* Maximum realistic size */
1859 count = vc->vc_rows;
1860 if (logo_shown >= 0)
1861 goto redraw_down;
1862 switch (p->scrollmode) {
1863 case SCROLL_MOVE:
1864 ops->bmove(vc, info, t, 0, t + count, 0,
1865 b - t - count, vc->vc_cols);
1866 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1867 break;
1868
1869 case SCROLL_WRAP_MOVE:
1870 if (b - t - count > 3 * vc->vc_rows >> 2) {
1871 if (vc->vc_rows - b > 0)
1872 fbcon_bmove(vc, b, 0, b - count, 0,
1873 vc->vc_rows - b,
1874 vc->vc_cols);
1875 ywrap_down(vc, count);
1876 if (t > 0)
1877 fbcon_bmove(vc, count, 0, 0, 0, t,
1878 vc->vc_cols);
1879 } else if (info->flags & FBINFO_READS_FAST)
1880 fbcon_bmove(vc, t, 0, t + count, 0,
1881 b - t - count, vc->vc_cols);
1882 else
1883 goto redraw_down;
1884 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1885 break;
1886
1887 case SCROLL_PAN_MOVE:
1888 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1889 && ((!scroll_partial && (b - t == vc->vc_rows))
1890 || (scroll_partial
1891 && (b - t - count >
1892 3 * vc->vc_rows >> 2)))) {
1893 if (vc->vc_rows - b > 0)
1894 fbcon_bmove(vc, b, 0, b - count, 0,
1895 vc->vc_rows - b,
1896 vc->vc_cols);
1897 ypan_down(vc, count);
1898 if (t > 0)
1899 fbcon_bmove(vc, count, 0, 0, 0, t,
1900 vc->vc_cols);
1901 } else if (info->flags & FBINFO_READS_FAST)
1902 fbcon_bmove(vc, t, 0, t + count, 0,
1903 b - t - count, vc->vc_cols);
1904 else
1905 goto redraw_down;
1906 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1907 break;
1908
1909 case SCROLL_PAN_REDRAW:
1910 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1911 && ((!scroll_partial && (b - t == vc->vc_rows))
1912 || (scroll_partial
1913 && (b - t - count >
1914 3 * vc->vc_rows >> 2)))) {
1915 if (vc->vc_rows - b > 0)
1916 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1917 b - count);
1918 ypan_down_redraw(vc, t, count);
1919 if (t > 0)
1920 fbcon_redraw_move(vc, p, count, t, 0);
1921 } else
1922 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1923 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1924 break;
1925
1926 case SCROLL_REDRAW:
1927 redraw_down:
1928 fbcon_redraw(vc, p, b - 1, b - t - count,
1929 -count * vc->vc_cols);
1930 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1931 scr_memsetw((unsigned short *) (vc->vc_origin +
1932 vc->vc_size_row *
1933 t),
1934 vc->vc_video_erase_char,
1935 vc->vc_size_row * count);
1936 return 1;
1937 }
1938 }
1939 return 0;
1940 }
1941
1942
1943 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1944 int height, int width)
1945 {
1946 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1947 struct display *p = &fb_display[vc->vc_num];
1948
1949 if (fbcon_is_inactive(vc, info))
1950 return;
1951
1952 if (!width || !height)
1953 return;
1954
1955 /* Split blits that cross physical y_wrap case.
1956 * Pathological case involves 4 blits, better to use recursive
1957 * code rather than unrolled case
1958 *
1959 * Recursive invocations don't need to erase the cursor over and
1960 * over again, so we use fbcon_bmove_rec()
1961 */
1962 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1963 p->vrows - p->yscroll);
1964 }
1965
1966 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1967 int dy, int dx, int height, int width, u_int y_break)
1968 {
1969 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1970 struct fbcon_ops *ops = info->fbcon_par;
1971 u_int b;
1972
1973 if (sy < y_break && sy + height > y_break) {
1974 b = y_break - sy;
1975 if (dy < sy) { /* Avoid trashing self */
1976 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1977 y_break);
1978 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1979 height - b, width, y_break);
1980 } else {
1981 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1982 height - b, width, y_break);
1983 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1984 y_break);
1985 }
1986 return;
1987 }
1988
1989 if (dy < y_break && dy + height > y_break) {
1990 b = y_break - dy;
1991 if (dy < sy) { /* Avoid trashing self */
1992 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1993 y_break);
1994 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1995 height - b, width, y_break);
1996 } else {
1997 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1998 height - b, width, y_break);
1999 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2000 y_break);
2001 }
2002 return;
2003 }
2004 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2005 height, width);
2006 }
2007
2008 static __inline__ void updatescrollmode(struct display *p,
2009 struct fb_info *info,
2010 struct vc_data *vc)
2011 {
2012 struct fbcon_ops *ops = info->fbcon_par;
2013 int fh = vc->vc_font.height;
2014 int cap = info->flags;
2015 u16 t = 0;
2016 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2017 info->fix.xpanstep);
2018 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2019 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2020 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2021 info->var.xres_virtual);
2022 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2023 divides(ypan, vc->vc_font.height) && vyres > yres;
2024 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2025 divides(ywrap, vc->vc_font.height) &&
2026 divides(vc->vc_font.height, vyres) &&
2027 divides(vc->vc_font.height, yres);
2028 int reading_fast = cap & FBINFO_READS_FAST;
2029 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2030 !(cap & FBINFO_HWACCEL_DISABLED);
2031 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2032 !(cap & FBINFO_HWACCEL_DISABLED);
2033
2034 p->vrows = vyres/fh;
2035 if (yres > (fh * (vc->vc_rows + 1)))
2036 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2037 if ((yres % fh) && (vyres % fh < yres % fh))
2038 p->vrows--;
2039
2040 if (good_wrap || good_pan) {
2041 if (reading_fast || fast_copyarea)
2042 p->scrollmode = good_wrap ?
2043 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2044 else
2045 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2046 SCROLL_PAN_REDRAW;
2047 } else {
2048 if (reading_fast || (fast_copyarea && !fast_imageblit))
2049 p->scrollmode = SCROLL_MOVE;
2050 else
2051 p->scrollmode = SCROLL_REDRAW;
2052 }
2053 }
2054
2055 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2056 unsigned int height)
2057 {
2058 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2059 struct fbcon_ops *ops = info->fbcon_par;
2060 struct display *p = &fb_display[vc->vc_num];
2061 struct fb_var_screeninfo var = info->var;
2062 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2063
2064 virt_w = FBCON_SWAP(ops->rotate, width, height);
2065 virt_h = FBCON_SWAP(ops->rotate, height, width);
2066 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2067 vc->vc_font.height);
2068 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2069 vc->vc_font.width);
2070 var.xres = virt_w * virt_fw;
2071 var.yres = virt_h * virt_fh;
2072 x_diff = info->var.xres - var.xres;
2073 y_diff = info->var.yres - var.yres;
2074 if (x_diff < 0 || x_diff > virt_fw ||
2075 y_diff < 0 || y_diff > virt_fh) {
2076 struct fb_videomode *mode;
2077
2078 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2079 mode = fb_find_best_mode(&var, &info->modelist);
2080 if (mode == NULL)
2081 return -EINVAL;
2082 display_to_var(&var, p);
2083 fb_videomode_to_var(&var, mode);
2084
2085 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2086 return -EINVAL;
2087
2088 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2089 if (CON_IS_VISIBLE(vc)) {
2090 var.activate = FB_ACTIVATE_NOW |
2091 FB_ACTIVATE_FORCE;
2092 fb_set_var(info, &var);
2093 }
2094 var_to_display(p, &info->var, info);
2095 ops->var = info->var;
2096 }
2097 updatescrollmode(p, info, vc);
2098 return 0;
2099 }
2100
2101 static int fbcon_switch(struct vc_data *vc)
2102 {
2103 struct fb_info *info, *old_info = NULL;
2104 struct fbcon_ops *ops;
2105 struct display *p = &fb_display[vc->vc_num];
2106 struct fb_var_screeninfo var;
2107 int i, prev_console, charcnt = 256;
2108
2109 info = registered_fb[con2fb_map[vc->vc_num]];
2110 ops = info->fbcon_par;
2111
2112 if (softback_top) {
2113 if (softback_lines)
2114 fbcon_set_origin(vc);
2115 softback_top = softback_curr = softback_in = softback_buf;
2116 softback_lines = 0;
2117 fbcon_update_softback(vc);
2118 }
2119
2120 if (logo_shown >= 0) {
2121 struct vc_data *conp2 = vc_cons[logo_shown].d;
2122
2123 if (conp2->vc_top == logo_lines
2124 && conp2->vc_bottom == conp2->vc_rows)
2125 conp2->vc_top = 0;
2126 logo_shown = FBCON_LOGO_CANSHOW;
2127 }
2128
2129 prev_console = ops->currcon;
2130 if (prev_console != -1)
2131 old_info = registered_fb[con2fb_map[prev_console]];
2132 /*
2133 * FIXME: If we have multiple fbdev's loaded, we need to
2134 * update all info->currcon. Perhaps, we can place this
2135 * in a centralized structure, but this might break some
2136 * drivers.
2137 *
2138 * info->currcon = vc->vc_num;
2139 */
2140 for (i = 0; i < FB_MAX; i++) {
2141 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2142 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2143
2144 o->currcon = vc->vc_num;
2145 }
2146 }
2147 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2148 display_to_var(&var, p);
2149 var.activate = FB_ACTIVATE_NOW;
2150
2151 /*
2152 * make sure we don't unnecessarily trip the memcmp()
2153 * in fb_set_var()
2154 */
2155 info->var.activate = var.activate;
2156 var.yoffset = info->var.yoffset;
2157 var.xoffset = info->var.xoffset;
2158 var.vmode = info->var.vmode;
2159 fb_set_var(info, &var);
2160 ops->var = info->var;
2161
2162 if (old_info != NULL && (old_info != info ||
2163 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2164 if (info->fbops->fb_set_par)
2165 info->fbops->fb_set_par(info);
2166
2167 if (old_info != info)
2168 fbcon_del_cursor_timer(old_info);
2169 }
2170
2171 fbcon_add_cursor_timer(info);
2172 set_blitting_type(vc, info);
2173 ops->cursor_reset = 1;
2174
2175 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2176 ops->rotate = FB_ROTATE_UR;
2177 set_blitting_type(vc, info);
2178 }
2179
2180 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2181 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2182
2183 if (p->userfont)
2184 charcnt = FNTCHARCNT(vc->vc_font.data);
2185
2186 if (charcnt > 256)
2187 vc->vc_complement_mask <<= 1;
2188
2189 updatescrollmode(p, info, vc);
2190
2191 switch (p->scrollmode) {
2192 case SCROLL_WRAP_MOVE:
2193 scrollback_phys_max = p->vrows - vc->vc_rows;
2194 break;
2195 case SCROLL_PAN_MOVE:
2196 case SCROLL_PAN_REDRAW:
2197 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2198 if (scrollback_phys_max < 0)
2199 scrollback_phys_max = 0;
2200 break;
2201 default:
2202 scrollback_phys_max = 0;
2203 break;
2204 }
2205
2206 scrollback_max = 0;
2207 scrollback_current = 0;
2208
2209 if (!fbcon_is_inactive(vc, info)) {
2210 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2211 ops->update_start(info);
2212 }
2213
2214 fbcon_set_palette(vc, color_table);
2215 fbcon_clear_margins(vc, 0);
2216
2217 if (logo_shown == FBCON_LOGO_DRAW) {
2218
2219 logo_shown = fg_console;
2220 /* This is protected above by initmem_freed */
2221 fb_show_logo(info, ops->rotate);
2222 update_region(vc,
2223 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2224 vc->vc_size_row * (vc->vc_bottom -
2225 vc->vc_top) / 2);
2226 return 0;
2227 }
2228 return 1;
2229 }
2230
2231 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2232 int blank)
2233 {
2234 if (blank) {
2235 unsigned short charmask = vc->vc_hi_font_mask ?
2236 0x1ff : 0xff;
2237 unsigned short oldc;
2238
2239 oldc = vc->vc_video_erase_char;
2240 vc->vc_video_erase_char &= charmask;
2241 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2242 vc->vc_video_erase_char = oldc;
2243 }
2244 }
2245
2246 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2247 {
2248 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2249 struct fbcon_ops *ops = info->fbcon_par;
2250
2251 if (mode_switch) {
2252 struct fb_var_screeninfo var = info->var;
2253
2254 ops->graphics = 1;
2255
2256 if (!blank) {
2257 if (info->fbops->fb_save_state)
2258 info->fbops->fb_save_state(info);
2259 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2260 fb_set_var(info, &var);
2261 ops->graphics = 0;
2262 ops->var = info->var;
2263 } else if (info->fbops->fb_restore_state)
2264 info->fbops->fb_restore_state(info);
2265 }
2266
2267 if (!fbcon_is_inactive(vc, info)) {
2268 if (ops->blank_state != blank) {
2269 ops->blank_state = blank;
2270 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2271 ops->cursor_flash = (!blank);
2272
2273 if (fb_blank(info, blank))
2274 fbcon_generic_blank(vc, info, blank);
2275 }
2276
2277 if (!blank)
2278 update_screen(vc);
2279 }
2280
2281 if (!blank)
2282 fbcon_add_cursor_timer(info);
2283 else
2284 fbcon_del_cursor_timer(info);
2285
2286 return 0;
2287 }
2288
2289 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2290 {
2291 u8 *fontdata = vc->vc_font.data;
2292 u8 *data = font->data;
2293 int i, j;
2294
2295 font->width = vc->vc_font.width;
2296 font->height = vc->vc_font.height;
2297 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2298 if (!font->data)
2299 return 0;
2300
2301 if (font->width <= 8) {
2302 j = vc->vc_font.height;
2303 for (i = 0; i < font->charcount; i++) {
2304 memcpy(data, fontdata, j);
2305 memset(data + j, 0, 32 - j);
2306 data += 32;
2307 fontdata += j;
2308 }
2309 } else if (font->width <= 16) {
2310 j = vc->vc_font.height * 2;
2311 for (i = 0; i < font->charcount; i++) {
2312 memcpy(data, fontdata, j);
2313 memset(data + j, 0, 64 - j);
2314 data += 64;
2315 fontdata += j;
2316 }
2317 } else if (font->width <= 24) {
2318 for (i = 0; i < font->charcount; i++) {
2319 for (j = 0; j < vc->vc_font.height; j++) {
2320 *data++ = fontdata[0];
2321 *data++ = fontdata[1];
2322 *data++ = fontdata[2];
2323 fontdata += sizeof(u32);
2324 }
2325 memset(data, 0, 3 * (32 - j));
2326 data += 3 * (32 - j);
2327 }
2328 } else {
2329 j = vc->vc_font.height * 4;
2330 for (i = 0; i < font->charcount; i++) {
2331 memcpy(data, fontdata, j);
2332 memset(data + j, 0, 128 - j);
2333 data += 128;
2334 fontdata += j;
2335 }
2336 }
2337 return 0;
2338 }
2339
2340 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2341 const u8 * data, int userfont)
2342 {
2343 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2344 struct fbcon_ops *ops = info->fbcon_par;
2345 struct display *p = &fb_display[vc->vc_num];
2346 int resize;
2347 int cnt;
2348 char *old_data = NULL;
2349
2350 if (CON_IS_VISIBLE(vc) && softback_lines)
2351 fbcon_set_origin(vc);
2352
2353 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2354 if (p->userfont)
2355 old_data = vc->vc_font.data;
2356 if (userfont)
2357 cnt = FNTCHARCNT(data);
2358 else
2359 cnt = 256;
2360 vc->vc_font.data = (void *)(p->fontdata = data);
2361 if ((p->userfont = userfont))
2362 REFCOUNT(data)++;
2363 vc->vc_font.width = w;
2364 vc->vc_font.height = h;
2365 if (vc->vc_hi_font_mask && cnt == 256) {
2366 vc->vc_hi_font_mask = 0;
2367 if (vc->vc_can_do_color) {
2368 vc->vc_complement_mask >>= 1;
2369 vc->vc_s_complement_mask >>= 1;
2370 }
2371
2372 /* ++Edmund: reorder the attribute bits */
2373 if (vc->vc_can_do_color) {
2374 unsigned short *cp =
2375 (unsigned short *) vc->vc_origin;
2376 int count = vc->vc_screenbuf_size / 2;
2377 unsigned short c;
2378 for (; count > 0; count--, cp++) {
2379 c = scr_readw(cp);
2380 scr_writew(((c & 0xfe00) >> 1) |
2381 (c & 0xff), cp);
2382 }
2383 c = vc->vc_video_erase_char;
2384 vc->vc_video_erase_char =
2385 ((c & 0xfe00) >> 1) | (c & 0xff);
2386 vc->vc_attr >>= 1;
2387 }
2388 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2389 vc->vc_hi_font_mask = 0x100;
2390 if (vc->vc_can_do_color) {
2391 vc->vc_complement_mask <<= 1;
2392 vc->vc_s_complement_mask <<= 1;
2393 }
2394
2395 /* ++Edmund: reorder the attribute bits */
2396 {
2397 unsigned short *cp =
2398 (unsigned short *) vc->vc_origin;
2399 int count = vc->vc_screenbuf_size / 2;
2400 unsigned short c;
2401 for (; count > 0; count--, cp++) {
2402 unsigned short newc;
2403 c = scr_readw(cp);
2404 if (vc->vc_can_do_color)
2405 newc =
2406 ((c & 0xff00) << 1) | (c &
2407 0xff);
2408 else
2409 newc = c & ~0x100;
2410 scr_writew(newc, cp);
2411 }
2412 c = vc->vc_video_erase_char;
2413 if (vc->vc_can_do_color) {
2414 vc->vc_video_erase_char =
2415 ((c & 0xff00) << 1) | (c & 0xff);
2416 vc->vc_attr <<= 1;
2417 } else
2418 vc->vc_video_erase_char = c & ~0x100;
2419 }
2420
2421 }
2422
2423 if (resize) {
2424 int cols, rows;
2425
2426 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2427 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2428 cols /= w;
2429 rows /= h;
2430 vc_resize(vc, cols, rows);
2431 if (CON_IS_VISIBLE(vc) && softback_buf)
2432 fbcon_update_softback(vc);
2433 } else if (CON_IS_VISIBLE(vc)
2434 && vc->vc_mode == KD_TEXT) {
2435 fbcon_clear_margins(vc, 0);
2436 update_screen(vc);
2437 }
2438
2439 if (old_data && (--REFCOUNT(old_data) == 0))
2440 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2441 return 0;
2442 }
2443
2444 static int fbcon_copy_font(struct vc_data *vc, int con)
2445 {
2446 struct display *od = &fb_display[con];
2447 struct console_font *f = &vc->vc_font;
2448
2449 if (od->fontdata == f->data)
2450 return 0; /* already the same font... */
2451 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2452 }
2453
2454 /*
2455 * User asked to set font; we are guaranteed that
2456 * a) width and height are in range 1..32
2457 * b) charcount does not exceed 512
2458 * but lets not assume that, since someone might someday want to use larger
2459 * fonts. And charcount of 512 is small for unicode support.
2460 *
2461 * However, user space gives the font in 32 rows , regardless of
2462 * actual font height. So a new API is needed if support for larger fonts
2463 * is ever implemented.
2464 */
2465
2466 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2467 {
2468 unsigned charcount = font->charcount;
2469 int w = font->width;
2470 int h = font->height;
2471 int size;
2472 int i, csum;
2473 u8 *new_data, *data = font->data;
2474 int pitch = (font->width+7) >> 3;
2475
2476 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2477 * If not this check should be changed to charcount < 256 */
2478 if (charcount != 256 && charcount != 512)
2479 return -EINVAL;
2480
2481 size = h * pitch * charcount;
2482
2483 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2484
2485 if (!new_data)
2486 return -ENOMEM;
2487
2488 new_data += FONT_EXTRA_WORDS * sizeof(int);
2489 FNTSIZE(new_data) = size;
2490 FNTCHARCNT(new_data) = charcount;
2491 REFCOUNT(new_data) = 0; /* usage counter */
2492 for (i=0; i< charcount; i++) {
2493 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2494 }
2495
2496 /* Since linux has a nice crc32 function use it for counting font
2497 * checksums. */
2498 csum = crc32(0, new_data, size);
2499
2500 FNTSUM(new_data) = csum;
2501 /* Check if the same font is on some other console already */
2502 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2503 struct vc_data *tmp = vc_cons[i].d;
2504
2505 if (fb_display[i].userfont &&
2506 fb_display[i].fontdata &&
2507 FNTSUM(fb_display[i].fontdata) == csum &&
2508 FNTSIZE(fb_display[i].fontdata) == size &&
2509 tmp->vc_font.width == w &&
2510 !memcmp(fb_display[i].fontdata, new_data, size)) {
2511 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2512 new_data = (u8 *)fb_display[i].fontdata;
2513 break;
2514 }
2515 }
2516 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2517 }
2518
2519 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2520 {
2521 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2522 const struct font_desc *f;
2523
2524 if (!name)
2525 f = get_default_font(info->var.xres, info->var.yres);
2526 else if (!(f = find_font(name)))
2527 return -ENOENT;
2528
2529 font->width = f->width;
2530 font->height = f->height;
2531 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2532 }
2533
2534 static u16 palette_red[16];
2535 static u16 palette_green[16];
2536 static u16 palette_blue[16];
2537
2538 static struct fb_cmap palette_cmap = {
2539 0, 16, palette_red, palette_green, palette_blue, NULL
2540 };
2541
2542 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2543 {
2544 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2545 int i, j, k, depth;
2546 u8 val;
2547
2548 if (fbcon_is_inactive(vc, info))
2549 return -EINVAL;
2550
2551 if (!CON_IS_VISIBLE(vc))
2552 return 0;
2553
2554 depth = fb_get_color_depth(&info->var, &info->fix);
2555 if (depth > 3) {
2556 for (i = j = 0; i < 16; i++) {
2557 k = table[i];
2558 val = vc->vc_palette[j++];
2559 palette_red[k] = (val << 8) | val;
2560 val = vc->vc_palette[j++];
2561 palette_green[k] = (val << 8) | val;
2562 val = vc->vc_palette[j++];
2563 palette_blue[k] = (val << 8) | val;
2564 }
2565 palette_cmap.len = 16;
2566 palette_cmap.start = 0;
2567 /*
2568 * If framebuffer is capable of less than 16 colors,
2569 * use default palette of fbcon.
2570 */
2571 } else
2572 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2573
2574 return fb_set_cmap(&palette_cmap, info);
2575 }
2576
2577 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2578 {
2579 unsigned long p;
2580 int line;
2581
2582 if (vc->vc_num != fg_console || !softback_lines)
2583 return (u16 *) (vc->vc_origin + offset);
2584 line = offset / vc->vc_size_row;
2585 if (line >= softback_lines)
2586 return (u16 *) (vc->vc_origin + offset -
2587 softback_lines * vc->vc_size_row);
2588 p = softback_curr + offset;
2589 if (p >= softback_end)
2590 p += softback_buf - softback_end;
2591 return (u16 *) p;
2592 }
2593
2594 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2595 int *px, int *py)
2596 {
2597 unsigned long ret;
2598 int x, y;
2599
2600 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2601 unsigned long offset = (pos - vc->vc_origin) / 2;
2602
2603 x = offset % vc->vc_cols;
2604 y = offset / vc->vc_cols;
2605 if (vc->vc_num == fg_console)
2606 y += softback_lines;
2607 ret = pos + (vc->vc_cols - x) * 2;
2608 } else if (vc->vc_num == fg_console && softback_lines) {
2609 unsigned long offset = pos - softback_curr;
2610
2611 if (pos < softback_curr)
2612 offset += softback_end - softback_buf;
2613 offset /= 2;
2614 x = offset % vc->vc_cols;
2615 y = offset / vc->vc_cols;
2616 ret = pos + (vc->vc_cols - x) * 2;
2617 if (ret == softback_end)
2618 ret = softback_buf;
2619 if (ret == softback_in)
2620 ret = vc->vc_origin;
2621 } else {
2622 /* Should not happen */
2623 x = y = 0;
2624 ret = vc->vc_origin;
2625 }
2626 if (px)
2627 *px = x;
2628 if (py)
2629 *py = y;
2630 return ret;
2631 }
2632
2633 /* As we might be inside of softback, we may work with non-contiguous buffer,
2634 that's why we have to use a separate routine. */
2635 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2636 {
2637 while (cnt--) {
2638 u16 a = scr_readw(p);
2639 if (!vc->vc_can_do_color)
2640 a ^= 0x0800;
2641 else if (vc->vc_hi_font_mask == 0x100)
2642 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2643 (((a) & 0x0e00) << 4);
2644 else
2645 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2646 (((a) & 0x0700) << 4);
2647 scr_writew(a, p++);
2648 if (p == (u16 *) softback_end)
2649 p = (u16 *) softback_buf;
2650 if (p == (u16 *) softback_in)
2651 p = (u16 *) vc->vc_origin;
2652 }
2653 }
2654
2655 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2656 {
2657 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2658 struct fbcon_ops *ops = info->fbcon_par;
2659 struct display *p = &fb_display[fg_console];
2660 int offset, limit, scrollback_old;
2661
2662 if (softback_top) {
2663 if (vc->vc_num != fg_console)
2664 return 0;
2665 if (vc->vc_mode != KD_TEXT || !lines)
2666 return 0;
2667 if (logo_shown >= 0) {
2668 struct vc_data *conp2 = vc_cons[logo_shown].d;
2669
2670 if (conp2->vc_top == logo_lines
2671 && conp2->vc_bottom == conp2->vc_rows)
2672 conp2->vc_top = 0;
2673 if (logo_shown == vc->vc_num) {
2674 unsigned long p, q;
2675 int i;
2676
2677 p = softback_in;
2678 q = vc->vc_origin +
2679 logo_lines * vc->vc_size_row;
2680 for (i = 0; i < logo_lines; i++) {
2681 if (p == softback_top)
2682 break;
2683 if (p == softback_buf)
2684 p = softback_end;
2685 p -= vc->vc_size_row;
2686 q -= vc->vc_size_row;
2687 scr_memcpyw((u16 *) q, (u16 *) p,
2688 vc->vc_size_row);
2689 }
2690 softback_in = softback_curr = p;
2691 update_region(vc, vc->vc_origin,
2692 logo_lines * vc->vc_cols);
2693 }
2694 logo_shown = FBCON_LOGO_CANSHOW;
2695 }
2696 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2697 fbcon_redraw_softback(vc, p, lines);
2698 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2699 return 0;
2700 }
2701
2702 if (!scrollback_phys_max)
2703 return -ENOSYS;
2704
2705 scrollback_old = scrollback_current;
2706 scrollback_current -= lines;
2707 if (scrollback_current < 0)
2708 scrollback_current = 0;
2709 else if (scrollback_current > scrollback_max)
2710 scrollback_current = scrollback_max;
2711 if (scrollback_current == scrollback_old)
2712 return 0;
2713
2714 if (fbcon_is_inactive(vc, info))
2715 return 0;
2716
2717 fbcon_cursor(vc, CM_ERASE);
2718
2719 offset = p->yscroll - scrollback_current;
2720 limit = p->vrows;
2721 switch (p->scrollmode) {
2722 case SCROLL_WRAP_MOVE:
2723 info->var.vmode |= FB_VMODE_YWRAP;
2724 break;
2725 case SCROLL_PAN_MOVE:
2726 case SCROLL_PAN_REDRAW:
2727 limit -= vc->vc_rows;
2728 info->var.vmode &= ~FB_VMODE_YWRAP;
2729 break;
2730 }
2731 if (offset < 0)
2732 offset += limit;
2733 else if (offset >= limit)
2734 offset -= limit;
2735
2736 ops->var.xoffset = 0;
2737 ops->var.yoffset = offset * vc->vc_font.height;
2738 ops->update_start(info);
2739
2740 if (!scrollback_current)
2741 fbcon_cursor(vc, CM_DRAW);
2742 return 0;
2743 }
2744
2745 static int fbcon_set_origin(struct vc_data *vc)
2746 {
2747 if (softback_lines)
2748 fbcon_scrolldelta(vc, softback_lines);
2749 return 0;
2750 }
2751
2752 static void fbcon_suspended(struct fb_info *info)
2753 {
2754 struct vc_data *vc = NULL;
2755 struct fbcon_ops *ops = info->fbcon_par;
2756
2757 if (!ops || ops->currcon < 0)
2758 return;
2759 vc = vc_cons[ops->currcon].d;
2760
2761 /* Clear cursor, restore saved data */
2762 fbcon_cursor(vc, CM_ERASE);
2763 }
2764
2765 static void fbcon_resumed(struct fb_info *info)
2766 {
2767 struct vc_data *vc;
2768 struct fbcon_ops *ops = info->fbcon_par;
2769
2770 if (!ops || ops->currcon < 0)
2771 return;
2772 vc = vc_cons[ops->currcon].d;
2773
2774 update_screen(vc);
2775 }
2776
2777 static void fbcon_modechanged(struct fb_info *info)
2778 {
2779 struct fbcon_ops *ops = info->fbcon_par;
2780 struct vc_data *vc;
2781 struct display *p;
2782 int rows, cols;
2783
2784 if (!ops || ops->currcon < 0)
2785 return;
2786 vc = vc_cons[ops->currcon].d;
2787 if (vc->vc_mode != KD_TEXT ||
2788 registered_fb[con2fb_map[ops->currcon]] != info)
2789 return;
2790
2791 p = &fb_display[vc->vc_num];
2792 set_blitting_type(vc, info);
2793
2794 if (CON_IS_VISIBLE(vc)) {
2795 var_to_display(p, &info->var, info);
2796 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2797 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2798 cols /= vc->vc_font.width;
2799 rows /= vc->vc_font.height;
2800 vc_resize(vc, cols, rows);
2801 updatescrollmode(p, info, vc);
2802 scrollback_max = 0;
2803 scrollback_current = 0;
2804
2805 if (!fbcon_is_inactive(vc, info)) {
2806 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2807 ops->update_start(info);
2808 }
2809
2810 fbcon_set_palette(vc, color_table);
2811 update_screen(vc);
2812 if (softback_buf)
2813 fbcon_update_softback(vc);
2814 }
2815 }
2816
2817 static void fbcon_set_all_vcs(struct fb_info *info)
2818 {
2819 struct fbcon_ops *ops = info->fbcon_par;
2820 struct vc_data *vc;
2821 struct display *p;
2822 int i, rows, cols;
2823
2824 if (!ops || ops->currcon < 0)
2825 return;
2826
2827 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2828 vc = vc_cons[i].d;
2829 if (!vc || vc->vc_mode != KD_TEXT ||
2830 registered_fb[con2fb_map[i]] != info)
2831 continue;
2832
2833 p = &fb_display[vc->vc_num];
2834 set_blitting_type(vc, info);
2835 var_to_display(p, &info->var, info);
2836 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2837 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2838 cols /= vc->vc_font.width;
2839 rows /= vc->vc_font.height;
2840 vc_resize(vc, cols, rows);
2841
2842 if (CON_IS_VISIBLE(vc)) {
2843 updatescrollmode(p, info, vc);
2844 scrollback_max = 0;
2845 scrollback_current = 0;
2846
2847 if (!fbcon_is_inactive(vc, info)) {
2848 ops->var.xoffset = ops->var.yoffset =
2849 p->yscroll = 0;
2850 ops->update_start(info);
2851 }
2852
2853 fbcon_set_palette(vc, color_table);
2854 update_screen(vc);
2855 if (softback_buf)
2856 fbcon_update_softback(vc);
2857 }
2858 }
2859
2860 ops->p = &fb_display[ops->currcon];
2861 }
2862
2863 static int fbcon_mode_deleted(struct fb_info *info,
2864 struct fb_videomode *mode)
2865 {
2866 struct fb_info *fb_info;
2867 struct display *p;
2868 int i, j, found = 0;
2869
2870 /* before deletion, ensure that mode is not in use */
2871 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2872 j = con2fb_map[i];
2873 if (j == -1)
2874 continue;
2875 fb_info = registered_fb[j];
2876 if (fb_info != info)
2877 continue;
2878 p = &fb_display[i];
2879 if (!p || !p->mode)
2880 continue;
2881 if (fb_mode_is_equal(p->mode, mode)) {
2882 found = 1;
2883 break;
2884 }
2885 }
2886 return found;
2887 }
2888
2889 static int fbcon_fb_unregistered(int idx)
2890 {
2891 int i;
2892
2893 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2894 if (con2fb_map[i] == idx)
2895 con2fb_map[i] = -1;
2896 }
2897
2898 if (idx == info_idx) {
2899 info_idx = -1;
2900
2901 for (i = 0; i < FB_MAX; i++) {
2902 if (registered_fb[i] != NULL) {
2903 info_idx = i;
2904 break;
2905 }
2906 }
2907 }
2908
2909 if (info_idx != -1) {
2910 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2911 if (con2fb_map[i] == -1)
2912 con2fb_map[i] = info_idx;
2913 }
2914 }
2915
2916 if (!num_registered_fb)
2917 unregister_con_driver(&fb_con);
2918
2919 return 0;
2920 }
2921
2922 static int fbcon_fb_registered(int idx)
2923 {
2924 int ret = 0, i;
2925
2926 if (info_idx == -1) {
2927 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2928 if (con2fb_map_boot[i] == idx) {
2929 info_idx = idx;
2930 break;
2931 }
2932 }
2933
2934 if (info_idx != -1)
2935 ret = fbcon_takeover(1);
2936 } else {
2937 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2938 if (con2fb_map_boot[i] == idx &&
2939 con2fb_map[i] == -1)
2940 set_con2fb_map(i, idx, 0);
2941 }
2942 }
2943
2944 return ret;
2945 }
2946
2947 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2948 {
2949 struct fbcon_ops *ops = info->fbcon_par;
2950 struct vc_data *vc;
2951
2952 if (!ops || ops->currcon < 0)
2953 return;
2954
2955 vc = vc_cons[ops->currcon].d;
2956 if (vc->vc_mode != KD_TEXT ||
2957 registered_fb[con2fb_map[ops->currcon]] != info)
2958 return;
2959
2960 if (CON_IS_VISIBLE(vc)) {
2961 if (blank)
2962 do_blank_screen(0);
2963 else
2964 do_unblank_screen(0);
2965 }
2966 ops->blank_state = blank;
2967 }
2968
2969 static void fbcon_new_modelist(struct fb_info *info)
2970 {
2971 int i;
2972 struct vc_data *vc;
2973 struct fb_var_screeninfo var;
2974 struct fb_videomode *mode;
2975
2976 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2977 if (registered_fb[con2fb_map[i]] != info)
2978 continue;
2979 if (!fb_display[i].mode)
2980 continue;
2981 vc = vc_cons[i].d;
2982 display_to_var(&var, &fb_display[i]);
2983 mode = fb_find_nearest_mode(fb_display[i].mode,
2984 &info->modelist);
2985 fb_videomode_to_var(&var, mode);
2986
2987 if (vc)
2988 fbcon_set_disp(info, &var, vc);
2989 else
2990 fbcon_preset_disp(info, &var, i);
2991
2992 }
2993 }
2994
2995 static int fbcon_event_notify(struct notifier_block *self,
2996 unsigned long action, void *data)
2997 {
2998 struct fb_event *event = data;
2999 struct fb_info *info = event->info;
3000 struct fb_videomode *mode;
3001 struct fb_con2fbmap *con2fb;
3002 int ret = 0;
3003
3004 /*
3005 * ignore all events except driver registration and deregistration
3006 * if fbcon is not active
3007 */
3008 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3009 action == FB_EVENT_FB_UNREGISTERED))
3010 goto done;
3011
3012 switch(action) {
3013 case FB_EVENT_SUSPEND:
3014 fbcon_suspended(info);
3015 break;
3016 case FB_EVENT_RESUME:
3017 fbcon_resumed(info);
3018 break;
3019 case FB_EVENT_MODE_CHANGE:
3020 fbcon_modechanged(info);
3021 break;
3022 case FB_EVENT_MODE_CHANGE_ALL:
3023 fbcon_set_all_vcs(info);
3024 break;
3025 case FB_EVENT_MODE_DELETE:
3026 mode = event->data;
3027 ret = fbcon_mode_deleted(info, mode);
3028 break;
3029 case FB_EVENT_FB_REGISTERED:
3030 ret = fbcon_fb_registered(info->node);
3031 break;
3032 case FB_EVENT_FB_UNREGISTERED:
3033 ret = fbcon_fb_unregistered(info->node);
3034 break;
3035 case FB_EVENT_SET_CONSOLE_MAP:
3036 con2fb = event->data;
3037 ret = set_con2fb_map(con2fb->console - 1,
3038 con2fb->framebuffer, 1);
3039 break;
3040 case FB_EVENT_GET_CONSOLE_MAP:
3041 con2fb = event->data;
3042 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3043 break;
3044 case FB_EVENT_BLANK:
3045 fbcon_fb_blanked(info, *(int *)event->data);
3046 break;
3047 case FB_EVENT_NEW_MODELIST:
3048 fbcon_new_modelist(info);
3049 break;
3050 }
3051
3052 done:
3053 return ret;
3054 }
3055
3056 /*
3057 * The console `switch' structure for the frame buffer based console
3058 */
3059
3060 static const struct consw fb_con = {
3061 .owner = THIS_MODULE,
3062 .con_startup = fbcon_startup,
3063 .con_init = fbcon_init,
3064 .con_deinit = fbcon_deinit,
3065 .con_clear = fbcon_clear,
3066 .con_putc = fbcon_putc,
3067 .con_putcs = fbcon_putcs,
3068 .con_cursor = fbcon_cursor,
3069 .con_scroll = fbcon_scroll,
3070 .con_bmove = fbcon_bmove,
3071 .con_switch = fbcon_switch,
3072 .con_blank = fbcon_blank,
3073 .con_font_set = fbcon_set_font,
3074 .con_font_get = fbcon_get_font,
3075 .con_font_default = fbcon_set_def_font,
3076 .con_font_copy = fbcon_copy_font,
3077 .con_set_palette = fbcon_set_palette,
3078 .con_scrolldelta = fbcon_scrolldelta,
3079 .con_set_origin = fbcon_set_origin,
3080 .con_invert_region = fbcon_invert_region,
3081 .con_screen_pos = fbcon_screen_pos,
3082 .con_getxy = fbcon_getxy,
3083 .con_resize = fbcon_resize,
3084 };
3085
3086 static struct notifier_block fbcon_event_notifier = {
3087 .notifier_call = fbcon_event_notify,
3088 };
3089
3090 static ssize_t store_rotate(struct class_device *class_device,
3091 const char *buf, size_t count)
3092 {
3093 struct fb_info *info;
3094 int rotate, idx;
3095 char **last = NULL;
3096
3097 if (fbcon_has_exited)
3098 return count;
3099
3100 acquire_console_sem();
3101 idx = con2fb_map[fg_console];
3102
3103 if (idx == -1 || registered_fb[idx] == NULL)
3104 goto err;
3105
3106 info = registered_fb[idx];
3107 rotate = simple_strtoul(buf, last, 0);
3108 fbcon_rotate(info, rotate);
3109 err:
3110 release_console_sem();
3111 return count;
3112 }
3113
3114 static ssize_t store_rotate_all(struct class_device *class_device,
3115 const char *buf, size_t count)
3116 {
3117 struct fb_info *info;
3118 int rotate, idx;
3119 char **last = NULL;
3120
3121 if (fbcon_has_exited)
3122 return count;
3123
3124 acquire_console_sem();
3125 idx = con2fb_map[fg_console];
3126
3127 if (idx == -1 || registered_fb[idx] == NULL)
3128 goto err;
3129
3130 info = registered_fb[idx];
3131 rotate = simple_strtoul(buf, last, 0);
3132 fbcon_rotate_all(info, rotate);
3133 err:
3134 release_console_sem();
3135 return count;
3136 }
3137
3138 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3139 {
3140 struct fb_info *info;
3141 int rotate = 0, idx;
3142
3143 if (fbcon_has_exited)
3144 return 0;
3145
3146 acquire_console_sem();
3147 idx = con2fb_map[fg_console];
3148
3149 if (idx == -1 || registered_fb[idx] == NULL)
3150 goto err;
3151
3152 info = registered_fb[idx];
3153 rotate = fbcon_get_rotate(info);
3154 err:
3155 release_console_sem();
3156 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3157 }
3158
3159 static struct class_device_attribute class_device_attrs[] = {
3160 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3161 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3162 };
3163
3164 static int fbcon_init_class_device(void)
3165 {
3166 int i;
3167
3168 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3169 class_device_create_file(fbcon_class_device,
3170 &class_device_attrs[i]);
3171 return 0;
3172 }
3173
3174 static void fbcon_start(void)
3175 {
3176 if (num_registered_fb) {
3177 int i;
3178
3179 acquire_console_sem();
3180
3181 for (i = 0; i < FB_MAX; i++) {
3182 if (registered_fb[i] != NULL) {
3183 info_idx = i;
3184 break;
3185 }
3186 }
3187
3188 release_console_sem();
3189 fbcon_takeover(0);
3190 }
3191 }
3192
3193 static void fbcon_exit(void)
3194 {
3195 struct fb_info *info;
3196 int i, j, mapped;
3197
3198 if (fbcon_has_exited)
3199 return;
3200
3201 #ifdef CONFIG_ATARI
3202 free_irq(IRQ_AUTO_4, fbcon_vbl_handler);
3203 #endif
3204 #ifdef CONFIG_MAC
3205 if (MACH_IS_MAC && vbl_detected)
3206 free_irq(IRQ_MAC_VBL, fbcon_vbl_handler);
3207 #endif
3208
3209 kfree((void *)softback_buf);
3210 softback_buf = 0UL;
3211
3212 for (i = 0; i < FB_MAX; i++) {
3213 mapped = 0;
3214 info = registered_fb[i];
3215
3216 if (info == NULL)
3217 continue;
3218
3219 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3220 if (con2fb_map[j] == i)
3221 mapped = 1;
3222 }
3223
3224 if (mapped) {
3225 if (info->fbops->fb_release)
3226 info->fbops->fb_release(info, 0);
3227 module_put(info->fbops->owner);
3228
3229 if (info->fbcon_par) {
3230 fbcon_del_cursor_timer(info);
3231 kfree(info->fbcon_par);
3232 info->fbcon_par = NULL;
3233 }
3234
3235 if (info->queue.func == fb_flashcursor)
3236 info->queue.func = NULL;
3237 }
3238 }
3239
3240 fbcon_has_exited = 1;
3241 }
3242
3243 static int __init fb_console_init(void)
3244 {
3245 int i;
3246
3247 acquire_console_sem();
3248 fb_register_client(&fbcon_event_notifier);
3249 fbcon_class_device =
3250 class_device_create(fb_class, NULL,
3251 MKDEV(FB_MAJOR, FB_MAX), NULL,
3252 "fbcon");
3253
3254 if (IS_ERR(fbcon_class_device)) {
3255 printk(KERN_WARNING "Unable to create class_device "
3256 "for fbcon; errno = %ld\n",
3257 PTR_ERR(fbcon_class_device));
3258 fbcon_class_device = NULL;
3259 } else
3260 fbcon_init_class_device();
3261
3262 for (i = 0; i < MAX_NR_CONSOLES; i++)
3263 con2fb_map[i] = -1;
3264
3265 release_console_sem();
3266 fbcon_start();
3267 return 0;
3268 }
3269
3270 module_init(fb_console_init);
3271
3272 #ifdef MODULE
3273
3274 static void __exit fbcon_deinit_class_device(void)
3275 {
3276 int i;
3277
3278 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3279 class_device_remove_file(fbcon_class_device,
3280 &class_device_attrs[i]);
3281 }
3282
3283 static void __exit fb_console_exit(void)
3284 {
3285 acquire_console_sem();
3286 fb_unregister_client(&fbcon_event_notifier);
3287 fbcon_deinit_class_device();
3288 class_device_destroy(fb_class, MKDEV(FB_MAJOR, FB_MAX));
3289 fbcon_exit();
3290 release_console_sem();
3291 unregister_con_driver(&fb_con);
3292 }
3293
3294 module_exit(fb_console_exit);
3295
3296 #endif
3297
3298 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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