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Merge branch 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block
[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/module.h>
62 #include <linux/types.h>
63 #include <linux/sched.h>
64 #include <linux/fs.h>
65 #include <linux/kernel.h>
66 #include <linux/delay.h> /* MSch: for IRQ probe */
67 #include <linux/console.h>
68 #include <linux/string.h>
69 #include <linux/kd.h>
70 #include <linux/slab.h>
71 #include <linux/fb.h>
72 #include <linux/vt_kern.h>
73 #include <linux/selection.h>
74 #include <linux/font.h>
75 #include <linux/smp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/crc32.h> /* For counting font checksums */
79 #include <asm/irq.h>
80 #include <asm/system.h>
81 #include <asm/uaccess.h>
82 #ifdef CONFIG_ATARI
83 #include <asm/atariints.h>
84 #endif
85 #ifdef CONFIG_MAC
86 #include <asm/macints.h>
87 #endif
88 #if defined(__mc68000__) || defined(CONFIG_APUS)
89 #include <asm/machdep.h>
90 #include <asm/setup.h>
91 #endif
92
93 #include "fbcon.h"
94
95 #ifdef FBCONDEBUG
96 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
97 #else
98 # define DPRINTK(fmt, args...)
99 #endif
100
101 enum {
102 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
103 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
104 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
105 };
106
107 static struct display fb_display[MAX_NR_CONSOLES];
108
109 static signed char con2fb_map[MAX_NR_CONSOLES];
110 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
111 static int logo_height;
112 static int logo_lines;
113 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
114 enums. */
115 static int logo_shown = FBCON_LOGO_CANSHOW;
116 /* Software scrollback */
117 static int fbcon_softback_size = 32768;
118 static unsigned long softback_buf, softback_curr;
119 static unsigned long softback_in;
120 static unsigned long softback_top, softback_end;
121 static int softback_lines;
122 /* console mappings */
123 static int first_fb_vc;
124 static int last_fb_vc = MAX_NR_CONSOLES - 1;
125 static int fbcon_is_default = 1;
126 static int fbcon_has_exited;
127
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 int fbcon_set_origin(struct vc_data *);
144
145 #define CURSOR_DRAW_DELAY (1)
146
147 /* # VBL ints between cursor state changes */
148 #define ATARI_CURSOR_BLINK_RATE (42)
149 #define MAC_CURSOR_BLINK_RATE (32)
150 #define DEFAULT_CURSOR_BLINK_RATE (20)
151
152 static int vbl_cursor_cnt;
153
154 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
155
156 /*
157 * Interface used by the world
158 */
159
160 static const char *fbcon_startup(void);
161 static void fbcon_init(struct vc_data *vc, int init);
162 static void fbcon_deinit(struct vc_data *vc);
163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
164 int width);
165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
167 int count, int ypos, int xpos);
168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
169 static void fbcon_cursor(struct vc_data *vc, int mode);
170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
171 int count);
172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
173 int height, int width);
174 static int fbcon_switch(struct vc_data *vc);
175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
178
179 /*
180 * Internal routines
181 */
182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
184 static __inline__ void ypan_up(struct vc_data *vc, int count);
185 static __inline__ void ypan_down(struct vc_data *vc, int count);
186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
187 int dy, int dx, int height, int width, u_int y_break);
188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 struct vc_data *vc);
190 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
191 int unit);
192 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
193 int line, int count, int dy);
194 static void fbcon_modechanged(struct fb_info *info);
195 static void fbcon_set_all_vcs(struct fb_info *info);
196 static void fbcon_start(void);
197 static void fbcon_exit(void);
198 static struct class_device *fbcon_class_device;
199
200 #ifdef CONFIG_MAC
201 /*
202 * On the Macintoy, there may or may not be a working VBL int. We need to probe
203 */
204 static int vbl_detected;
205
206 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
207 {
208 vbl_detected++;
209 return IRQ_HANDLED;
210 }
211 #endif
212
213 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
214 static inline void fbcon_set_rotation(struct fb_info *info)
215 {
216 struct fbcon_ops *ops = info->fbcon_par;
217
218 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
219 ops->p->con_rotate < 4)
220 ops->rotate = ops->p->con_rotate;
221 else
222 ops->rotate = 0;
223 }
224
225 static void fbcon_rotate(struct fb_info *info, u32 rotate)
226 {
227 struct fbcon_ops *ops= info->fbcon_par;
228 struct fb_info *fb_info;
229
230 if (!ops || ops->currcon == -1)
231 return;
232
233 fb_info = registered_fb[con2fb_map[ops->currcon]];
234
235 if (info == fb_info) {
236 struct display *p = &fb_display[ops->currcon];
237
238 if (rotate < 4)
239 p->con_rotate = rotate;
240 else
241 p->con_rotate = 0;
242
243 fbcon_modechanged(info);
244 }
245 }
246
247 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
248 {
249 struct fbcon_ops *ops = info->fbcon_par;
250 struct vc_data *vc;
251 struct display *p;
252 int i;
253
254 if (!ops || ops->currcon < 0 || rotate > 3)
255 return;
256
257 for (i = first_fb_vc; i <= last_fb_vc; i++) {
258 vc = vc_cons[i].d;
259 if (!vc || vc->vc_mode != KD_TEXT ||
260 registered_fb[con2fb_map[i]] != info)
261 continue;
262
263 p = &fb_display[vc->vc_num];
264 p->con_rotate = rotate;
265 }
266
267 fbcon_set_all_vcs(info);
268 }
269 #else
270 static inline void fbcon_set_rotation(struct fb_info *info)
271 {
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 ops->rotate = FB_ROTATE_UR;
275 }
276
277 static void fbcon_rotate(struct fb_info *info, u32 rotate)
278 {
279 return;
280 }
281
282 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
283 {
284 return;
285 }
286 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
287
288 static int fbcon_get_rotate(struct fb_info *info)
289 {
290 struct fbcon_ops *ops = info->fbcon_par;
291
292 return (ops) ? ops->rotate : 0;
293 }
294
295 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
296 {
297 struct fbcon_ops *ops = info->fbcon_par;
298
299 return (info->state != FBINFO_STATE_RUNNING ||
300 vc->vc_mode != KD_TEXT || ops->graphics);
301 }
302
303 static inline int get_color(struct vc_data *vc, struct fb_info *info,
304 u16 c, int is_fg)
305 {
306 int depth = fb_get_color_depth(&info->var, &info->fix);
307 int color = 0;
308
309 if (console_blanked) {
310 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
311
312 c = vc->vc_video_erase_char & charmask;
313 }
314
315 if (depth != 1)
316 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
317 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
318
319 switch (depth) {
320 case 1:
321 {
322 int col = ~(0xfff << (max(info->var.green.length,
323 max(info->var.red.length,
324 info->var.blue.length)))) & 0xff;
325
326 /* 0 or 1 */
327 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
328 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
329
330 if (console_blanked)
331 fg = bg;
332
333 color = (is_fg) ? fg : bg;
334 break;
335 }
336 case 2:
337 /*
338 * Scale down 16-colors to 4 colors. Default 4-color palette
339 * is grayscale. However, simply dividing the values by 4
340 * will not work, as colors 1, 2 and 3 will be scaled-down
341 * to zero rendering them invisible. So empirically convert
342 * colors to a sane 4-level grayscale.
343 */
344 switch (color) {
345 case 0:
346 color = 0; /* black */
347 break;
348 case 1 ... 6:
349 color = 2; /* white */
350 break;
351 case 7 ... 8:
352 color = 1; /* gray */
353 break;
354 default:
355 color = 3; /* intense white */
356 break;
357 }
358 break;
359 case 3:
360 /*
361 * Last 8 entries of default 16-color palette is a more intense
362 * version of the first 8 (i.e., same chrominance, different
363 * luminance).
364 */
365 color &= 7;
366 break;
367 }
368
369
370 return color;
371 }
372
373 static void fbcon_update_softback(struct vc_data *vc)
374 {
375 int l = fbcon_softback_size / vc->vc_size_row;
376
377 if (l > 5)
378 softback_end = softback_buf + l * vc->vc_size_row;
379 else
380 /* Smaller scrollback makes no sense, and 0 would screw
381 the operation totally */
382 softback_top = 0;
383 }
384
385 static void fb_flashcursor(void *private)
386 {
387 struct fb_info *info = private;
388 struct fbcon_ops *ops = info->fbcon_par;
389 struct display *p;
390 struct vc_data *vc = NULL;
391 int c;
392 int mode;
393
394 acquire_console_sem();
395 if (ops && ops->currcon != -1)
396 vc = vc_cons[ops->currcon].d;
397
398 if (!vc || !CON_IS_VISIBLE(vc) ||
399 fbcon_is_inactive(vc, info) ||
400 registered_fb[con2fb_map[vc->vc_num]] != info ||
401 vc_cons[ops->currcon].d->vc_deccm != 1) {
402 release_console_sem();
403 return;
404 }
405
406 p = &fb_display[vc->vc_num];
407 c = scr_readw((u16 *) vc->vc_pos);
408 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
409 CM_ERASE : CM_DRAW;
410 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
411 get_color(vc, info, c, 0));
412 release_console_sem();
413 }
414
415 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
416 static int cursor_blink_rate;
417 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
418 {
419 struct fb_info *info = dev_id;
420
421 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
422 schedule_work(&info->queue);
423 vbl_cursor_cnt = cursor_blink_rate;
424 }
425 return IRQ_HANDLED;
426 }
427 #endif
428
429 static void cursor_timer_handler(unsigned long dev_addr)
430 {
431 struct fb_info *info = (struct fb_info *) dev_addr;
432 struct fbcon_ops *ops = info->fbcon_par;
433
434 schedule_work(&info->queue);
435 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
436 }
437
438 static void fbcon_add_cursor_timer(struct fb_info *info)
439 {
440 struct fbcon_ops *ops = info->fbcon_par;
441
442 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
443 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
444 if (!info->queue.func)
445 INIT_WORK(&info->queue, fb_flashcursor, info);
446
447 init_timer(&ops->cursor_timer);
448 ops->cursor_timer.function = cursor_timer_handler;
449 ops->cursor_timer.expires = jiffies + HZ / 5;
450 ops->cursor_timer.data = (unsigned long ) info;
451 add_timer(&ops->cursor_timer);
452 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
453 }
454 }
455
456 static void fbcon_del_cursor_timer(struct fb_info *info)
457 {
458 struct fbcon_ops *ops = info->fbcon_par;
459
460 if (info->queue.func == fb_flashcursor &&
461 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
462 del_timer_sync(&ops->cursor_timer);
463 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
464 }
465 }
466
467 #ifndef MODULE
468 static int __init fb_console_setup(char *this_opt)
469 {
470 char *options;
471 int i, j;
472
473 if (!this_opt || !*this_opt)
474 return 1;
475
476 while ((options = strsep(&this_opt, ",")) != NULL) {
477 if (!strncmp(options, "font:", 5))
478 strcpy(fontname, options + 5);
479
480 if (!strncmp(options, "scrollback:", 11)) {
481 options += 11;
482 if (*options) {
483 fbcon_softback_size = simple_strtoul(options, &options, 0);
484 if (*options == 'k' || *options == 'K') {
485 fbcon_softback_size *= 1024;
486 options++;
487 }
488 if (*options != ',')
489 return 1;
490 options++;
491 } else
492 return 1;
493 }
494
495 if (!strncmp(options, "map:", 4)) {
496 options += 4;
497 if (*options)
498 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
499 if (!options[j])
500 j = 0;
501 con2fb_map_boot[i] =
502 (options[j++]-'0') % FB_MAX;
503 }
504 return 1;
505 }
506
507 if (!strncmp(options, "vc:", 3)) {
508 options += 3;
509 if (*options)
510 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
511 if (first_fb_vc < 0)
512 first_fb_vc = 0;
513 if (*options++ == '-')
514 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
515 fbcon_is_default = 0;
516 }
517
518 if (!strncmp(options, "rotate:", 7)) {
519 options += 7;
520 if (*options)
521 rotate = simple_strtoul(options, &options, 0);
522 if (rotate > 3)
523 rotate = 0;
524 }
525 }
526 return 1;
527 }
528
529 __setup("fbcon=", fb_console_setup);
530 #endif
531
532 static int search_fb_in_map(int idx)
533 {
534 int i, retval = 0;
535
536 for (i = first_fb_vc; i <= last_fb_vc; i++) {
537 if (con2fb_map[i] == idx)
538 retval = 1;
539 }
540 return retval;
541 }
542
543 static int search_for_mapped_con(void)
544 {
545 int i, retval = 0;
546
547 for (i = first_fb_vc; i <= last_fb_vc; i++) {
548 if (con2fb_map[i] != -1)
549 retval = 1;
550 }
551 return retval;
552 }
553
554 static int fbcon_takeover(int show_logo)
555 {
556 int err, i;
557
558 if (!num_registered_fb)
559 return -ENODEV;
560
561 if (!show_logo)
562 logo_shown = FBCON_LOGO_DONTSHOW;
563
564 for (i = first_fb_vc; i <= last_fb_vc; i++)
565 con2fb_map[i] = info_idx;
566
567 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
568 fbcon_is_default);
569
570 if (err) {
571 for (i = first_fb_vc; i <= last_fb_vc; i++) {
572 con2fb_map[i] = -1;
573 }
574 info_idx = -1;
575 }
576
577 return err;
578 }
579
580 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
581 int cols, int rows, int new_cols, int new_rows)
582 {
583 /* Need to make room for the logo */
584 struct fbcon_ops *ops = info->fbcon_par;
585 int cnt, erase = vc->vc_video_erase_char, step;
586 unsigned short *save = NULL, *r, *q;
587
588 /*
589 * remove underline attribute from erase character
590 * if black and white framebuffer.
591 */
592 if (fb_get_color_depth(&info->var, &info->fix) == 1)
593 erase &= ~0x400;
594 logo_height = fb_prepare_logo(info, ops->rotate);
595 logo_lines = (logo_height + vc->vc_font.height - 1) /
596 vc->vc_font.height;
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
605 if (save) {
606 int i = cols < new_cols ? cols : new_cols;
607 scr_memsetw(save, erase, logo_lines * new_cols * 2);
608 r = q - step;
609 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
610 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
611 r = q;
612 }
613 }
614 if (r == q) {
615 /* We can scroll screen down */
616 r = q - step - cols;
617 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
618 scr_memcpyw(r + step, r, vc->vc_size_row);
619 r -= cols;
620 }
621 if (!save) {
622 vc->vc_y += logo_lines;
623 vc->vc_pos += logo_lines * vc->vc_size_row;
624 }
625 }
626 scr_memsetw((unsigned short *) vc->vc_origin,
627 erase,
628 vc->vc_size_row * logo_lines);
629
630 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
631 fbcon_clear_margins(vc, 0);
632 update_screen(vc);
633 }
634
635 if (save) {
636 q = (unsigned short *) (vc->vc_origin +
637 vc->vc_size_row *
638 rows);
639 scr_memcpyw(q, save, logo_lines * new_cols * 2);
640 vc->vc_y += logo_lines;
641 vc->vc_pos += logo_lines * vc->vc_size_row;
642 kfree(save);
643 }
644
645 if (logo_lines > vc->vc_bottom) {
646 logo_shown = FBCON_LOGO_CANSHOW;
647 printk(KERN_INFO
648 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
649 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
650 logo_shown = FBCON_LOGO_DRAW;
651 vc->vc_top = logo_lines;
652 }
653 }
654
655 #ifdef CONFIG_FB_TILEBLITTING
656 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
657 {
658 struct fbcon_ops *ops = info->fbcon_par;
659
660 ops->p = &fb_display[vc->vc_num];
661
662 if ((info->flags & FBINFO_MISC_TILEBLITTING))
663 fbcon_set_tileops(vc, info);
664 else {
665 fbcon_set_rotation(info);
666 fbcon_set_bitops(ops);
667 }
668 }
669 #else
670 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
671 {
672 struct fbcon_ops *ops = info->fbcon_par;
673
674 info->flags &= ~FBINFO_MISC_TILEBLITTING;
675 ops->p = &fb_display[vc->vc_num];
676 fbcon_set_rotation(info);
677 fbcon_set_bitops(ops);
678 }
679 #endif /* CONFIG_MISC_TILEBLITTING */
680
681
682 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
683 int unit, int oldidx)
684 {
685 struct fbcon_ops *ops = NULL;
686 int err = 0;
687
688 if (!try_module_get(info->fbops->owner))
689 err = -ENODEV;
690
691 if (!err && info->fbops->fb_open &&
692 info->fbops->fb_open(info, 0))
693 err = -ENODEV;
694
695 if (!err) {
696 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
697 if (!ops)
698 err = -ENOMEM;
699 }
700
701 if (!err) {
702 info->fbcon_par = ops;
703 set_blitting_type(vc, info);
704 }
705
706 if (err) {
707 con2fb_map[unit] = oldidx;
708 module_put(info->fbops->owner);
709 }
710
711 return err;
712 }
713
714 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
715 struct fb_info *newinfo, int unit,
716 int oldidx, int found)
717 {
718 struct fbcon_ops *ops = oldinfo->fbcon_par;
719 int err = 0;
720
721 if (oldinfo->fbops->fb_release &&
722 oldinfo->fbops->fb_release(oldinfo, 0)) {
723 con2fb_map[unit] = oldidx;
724 if (!found && newinfo->fbops->fb_release)
725 newinfo->fbops->fb_release(newinfo, 0);
726 if (!found)
727 module_put(newinfo->fbops->owner);
728 err = -ENODEV;
729 }
730
731 if (!err) {
732 fbcon_del_cursor_timer(oldinfo);
733 kfree(ops->cursor_state.mask);
734 kfree(ops->cursor_data);
735 kfree(ops->fontbuffer);
736 kfree(oldinfo->fbcon_par);
737 oldinfo->fbcon_par = NULL;
738 module_put(oldinfo->fbops->owner);
739 /*
740 If oldinfo and newinfo are driving the same hardware,
741 the fb_release() method of oldinfo may attempt to
742 restore the hardware state. This will leave the
743 newinfo in an undefined state. Thus, a call to
744 fb_set_par() may be needed for the newinfo.
745 */
746 if (newinfo->fbops->fb_set_par)
747 newinfo->fbops->fb_set_par(newinfo);
748 }
749
750 return err;
751 }
752
753 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
754 int unit, int show_logo)
755 {
756 struct fbcon_ops *ops = info->fbcon_par;
757
758 ops->currcon = fg_console;
759
760 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
761 info->fbops->fb_set_par(info);
762
763 ops->flags |= FBCON_FLAGS_INIT;
764 ops->graphics = 0;
765
766 if (vc)
767 fbcon_set_disp(info, &info->var, vc);
768 else
769 fbcon_preset_disp(info, &info->var, unit);
770
771 if (show_logo) {
772 struct vc_data *fg_vc = vc_cons[fg_console].d;
773 struct fb_info *fg_info =
774 registered_fb[con2fb_map[fg_console]];
775
776 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
777 fg_vc->vc_rows, fg_vc->vc_cols,
778 fg_vc->vc_rows);
779 }
780
781 update_screen(vc_cons[fg_console].d);
782 }
783
784 /**
785 * set_con2fb_map - map console to frame buffer device
786 * @unit: virtual console number to map
787 * @newidx: frame buffer index to map virtual console to
788 * @user: user request
789 *
790 * Maps a virtual console @unit to a frame buffer device
791 * @newidx.
792 */
793 static int set_con2fb_map(int unit, int newidx, int user)
794 {
795 struct vc_data *vc = vc_cons[unit].d;
796 int oldidx = con2fb_map[unit];
797 struct fb_info *info = registered_fb[newidx];
798 struct fb_info *oldinfo = NULL;
799 int found, err = 0;
800
801 if (oldidx == newidx)
802 return 0;
803
804 if (!info || fbcon_has_exited)
805 return -EINVAL;
806
807 if (!err && !search_for_mapped_con()) {
808 info_idx = newidx;
809 return fbcon_takeover(0);
810 }
811
812 if (oldidx != -1)
813 oldinfo = registered_fb[oldidx];
814
815 found = search_fb_in_map(newidx);
816
817 acquire_console_sem();
818 con2fb_map[unit] = newidx;
819 if (!err && !found)
820 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
821
822
823 /*
824 * If old fb is not mapped to any of the consoles,
825 * fbcon should release it.
826 */
827 if (!err && oldinfo && !search_fb_in_map(oldidx))
828 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
829 found);
830
831 if (!err) {
832 int show_logo = (fg_console == 0 && !user &&
833 logo_shown != FBCON_LOGO_DONTSHOW);
834
835 if (!found)
836 fbcon_add_cursor_timer(info);
837 con2fb_map_boot[unit] = newidx;
838 con2fb_init_display(vc, info, unit, show_logo);
839 }
840
841 if (!search_fb_in_map(info_idx))
842 info_idx = newidx;
843
844 release_console_sem();
845 return err;
846 }
847
848 /*
849 * Low Level Operations
850 */
851 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
852 static int var_to_display(struct display *disp,
853 struct fb_var_screeninfo *var,
854 struct fb_info *info)
855 {
856 disp->xres_virtual = var->xres_virtual;
857 disp->yres_virtual = var->yres_virtual;
858 disp->bits_per_pixel = var->bits_per_pixel;
859 disp->grayscale = var->grayscale;
860 disp->nonstd = var->nonstd;
861 disp->accel_flags = var->accel_flags;
862 disp->height = var->height;
863 disp->width = var->width;
864 disp->red = var->red;
865 disp->green = var->green;
866 disp->blue = var->blue;
867 disp->transp = var->transp;
868 disp->rotate = var->rotate;
869 disp->mode = fb_match_mode(var, &info->modelist);
870 if (disp->mode == NULL)
871 /* This should not happen */
872 return -EINVAL;
873 return 0;
874 }
875
876 static void display_to_var(struct fb_var_screeninfo *var,
877 struct display *disp)
878 {
879 fb_videomode_to_var(var, disp->mode);
880 var->xres_virtual = disp->xres_virtual;
881 var->yres_virtual = disp->yres_virtual;
882 var->bits_per_pixel = disp->bits_per_pixel;
883 var->grayscale = disp->grayscale;
884 var->nonstd = disp->nonstd;
885 var->accel_flags = disp->accel_flags;
886 var->height = disp->height;
887 var->width = disp->width;
888 var->red = disp->red;
889 var->green = disp->green;
890 var->blue = disp->blue;
891 var->transp = disp->transp;
892 var->rotate = disp->rotate;
893 }
894
895 static const char *fbcon_startup(void)
896 {
897 const char *display_desc = "frame buffer device";
898 struct display *p = &fb_display[fg_console];
899 struct vc_data *vc = vc_cons[fg_console].d;
900 const struct font_desc *font = NULL;
901 struct module *owner;
902 struct fb_info *info = NULL;
903 struct fbcon_ops *ops;
904 int rows, cols;
905 int irqres;
906
907 irqres = 1;
908 /*
909 * If num_registered_fb is zero, this is a call for the dummy part.
910 * The frame buffer devices weren't initialized yet.
911 */
912 if (!num_registered_fb || info_idx == -1)
913 return display_desc;
914 /*
915 * Instead of blindly using registered_fb[0], we use info_idx, set by
916 * fb_console_init();
917 */
918 info = registered_fb[info_idx];
919 if (!info)
920 return NULL;
921
922 owner = info->fbops->owner;
923 if (!try_module_get(owner))
924 return NULL;
925 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
926 module_put(owner);
927 return NULL;
928 }
929
930 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
931 if (!ops) {
932 module_put(owner);
933 return NULL;
934 }
935
936 ops->currcon = -1;
937 ops->graphics = 1;
938 ops->cur_rotate = -1;
939 info->fbcon_par = ops;
940 p->con_rotate = rotate;
941 set_blitting_type(vc, info);
942
943 if (info->fix.type != FB_TYPE_TEXT) {
944 if (fbcon_softback_size) {
945 if (!softback_buf) {
946 softback_buf =
947 (unsigned long)
948 kmalloc(fbcon_softback_size,
949 GFP_KERNEL);
950 if (!softback_buf) {
951 fbcon_softback_size = 0;
952 softback_top = 0;
953 }
954 }
955 } else {
956 if (softback_buf) {
957 kfree((void *) softback_buf);
958 softback_buf = 0;
959 softback_top = 0;
960 }
961 }
962 if (softback_buf)
963 softback_in = softback_top = softback_curr =
964 softback_buf;
965 softback_lines = 0;
966 }
967
968 /* Setup default font */
969 if (!p->fontdata) {
970 if (!fontname[0] || !(font = find_font(fontname)))
971 font = get_default_font(info->var.xres,
972 info->var.yres);
973 vc->vc_font.width = font->width;
974 vc->vc_font.height = font->height;
975 vc->vc_font.data = (void *)(p->fontdata = font->data);
976 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
977 }
978
979 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
980 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
981 cols /= vc->vc_font.width;
982 rows /= vc->vc_font.height;
983 vc_resize(vc, cols, rows);
984
985 DPRINTK("mode: %s\n", info->fix.id);
986 DPRINTK("visual: %d\n", info->fix.visual);
987 DPRINTK("res: %dx%d-%d\n", info->var.xres,
988 info->var.yres,
989 info->var.bits_per_pixel);
990
991 #ifdef CONFIG_ATARI
992 if (MACH_IS_ATARI) {
993 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
994 irqres =
995 request_irq(IRQ_AUTO_4, fb_vbl_handler,
996 IRQ_TYPE_PRIO, "framebuffer vbl",
997 info);
998 }
999 #endif /* CONFIG_ATARI */
1000
1001 #ifdef CONFIG_MAC
1002 /*
1003 * On a Macintoy, the VBL interrupt may or may not be active.
1004 * As interrupt based cursor is more reliable and race free, we
1005 * probe for VBL interrupts.
1006 */
1007 if (MACH_IS_MAC) {
1008 int ct = 0;
1009 /*
1010 * Probe for VBL: set temp. handler ...
1011 */
1012 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1013 "framebuffer vbl", info);
1014 vbl_detected = 0;
1015
1016 /*
1017 * ... and spin for 20 ms ...
1018 */
1019 while (!vbl_detected && ++ct < 1000)
1020 udelay(20);
1021
1022 if (ct == 1000)
1023 printk
1024 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1025
1026 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1027
1028 if (vbl_detected) {
1029 /*
1030 * interrupt based cursor ok
1031 */
1032 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1033 irqres =
1034 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1035 "framebuffer vbl", info);
1036 } else {
1037 /*
1038 * VBL not detected: fall through, use timer based cursor
1039 */
1040 irqres = 1;
1041 }
1042 }
1043 #endif /* CONFIG_MAC */
1044
1045 fbcon_add_cursor_timer(info);
1046 fbcon_has_exited = 0;
1047 return display_desc;
1048 }
1049
1050 static void fbcon_init(struct vc_data *vc, int init)
1051 {
1052 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1053 struct fbcon_ops *ops;
1054 struct vc_data **default_mode = vc->vc_display_fg;
1055 struct vc_data *svc = *default_mode;
1056 struct display *t, *p = &fb_display[vc->vc_num];
1057 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1058 int cap;
1059
1060 if (info_idx == -1 || info == NULL)
1061 return;
1062
1063 cap = info->flags;
1064
1065 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1066 (info->fix.type == FB_TYPE_TEXT))
1067 logo = 0;
1068
1069 if (var_to_display(p, &info->var, info))
1070 return;
1071
1072 /* If we are not the first console on this
1073 fb, copy the font from that console */
1074 t = &fb_display[fg_console];
1075 if (!p->fontdata) {
1076 if (t->fontdata) {
1077 struct vc_data *fvc = vc_cons[fg_console].d;
1078
1079 vc->vc_font.data = (void *)(p->fontdata =
1080 fvc->vc_font.data);
1081 vc->vc_font.width = fvc->vc_font.width;
1082 vc->vc_font.height = fvc->vc_font.height;
1083 p->userfont = t->userfont;
1084
1085 if (p->userfont)
1086 REFCOUNT(p->fontdata)++;
1087 } else {
1088 const struct font_desc *font = NULL;
1089
1090 if (!fontname[0] || !(font = find_font(fontname)))
1091 font = get_default_font(info->var.xres,
1092 info->var.yres);
1093 vc->vc_font.width = font->width;
1094 vc->vc_font.height = font->height;
1095 vc->vc_font.data = (void *)(p->fontdata = font->data);
1096 vc->vc_font.charcount = 256; /* FIXME Need to
1097 support more fonts */
1098 }
1099 }
1100
1101 if (p->userfont)
1102 charcnt = FNTCHARCNT(p->fontdata);
1103
1104 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1105 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1106 if (charcnt == 256) {
1107 vc->vc_hi_font_mask = 0;
1108 } else {
1109 vc->vc_hi_font_mask = 0x100;
1110 if (vc->vc_can_do_color)
1111 vc->vc_complement_mask <<= 1;
1112 }
1113
1114 if (!*svc->vc_uni_pagedir_loc)
1115 con_set_default_unimap(svc);
1116 if (!*vc->vc_uni_pagedir_loc)
1117 con_copy_unimap(vc, svc);
1118
1119 ops = info->fbcon_par;
1120 p->con_rotate = rotate;
1121 set_blitting_type(vc, info);
1122
1123 cols = vc->vc_cols;
1124 rows = vc->vc_rows;
1125 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1126 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1127 new_cols /= vc->vc_font.width;
1128 new_rows /= vc->vc_font.height;
1129 vc_resize(vc, new_cols, new_rows);
1130
1131 /*
1132 * We must always set the mode. The mode of the previous console
1133 * driver could be in the same resolution but we are using different
1134 * hardware so we have to initialize the hardware.
1135 *
1136 * We need to do it in fbcon_init() to prevent screen corruption.
1137 */
1138 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1139 if (info->fbops->fb_set_par &&
1140 !(ops->flags & FBCON_FLAGS_INIT))
1141 info->fbops->fb_set_par(info);
1142 ops->flags |= FBCON_FLAGS_INIT;
1143 }
1144
1145 ops->graphics = 0;
1146
1147 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1148 !(cap & FBINFO_HWACCEL_DISABLED))
1149 p->scrollmode = SCROLL_MOVE;
1150 else /* default to something safe */
1151 p->scrollmode = SCROLL_REDRAW;
1152
1153 /*
1154 * ++guenther: console.c:vc_allocate() relies on initializing
1155 * vc_{cols,rows}, but we must not set those if we are only
1156 * resizing the console.
1157 */
1158 if (!init) {
1159 vc->vc_cols = new_cols;
1160 vc->vc_rows = new_rows;
1161 }
1162
1163 if (logo)
1164 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1165
1166 if (vc == svc && softback_buf)
1167 fbcon_update_softback(vc);
1168
1169 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1170 ops->rotate = FB_ROTATE_UR;
1171 set_blitting_type(vc, info);
1172 }
1173
1174 ops->p = &fb_display[fg_console];
1175 }
1176
1177 static void fbcon_free_font(struct display *p)
1178 {
1179 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1180 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1181 p->fontdata = NULL;
1182 p->userfont = 0;
1183 }
1184
1185 static void fbcon_deinit(struct vc_data *vc)
1186 {
1187 struct display *p = &fb_display[vc->vc_num];
1188 struct fb_info *info;
1189 struct fbcon_ops *ops;
1190 int idx;
1191
1192 fbcon_free_font(p);
1193 idx = con2fb_map[vc->vc_num];
1194
1195 if (idx == -1)
1196 goto finished;
1197
1198 info = registered_fb[idx];
1199
1200 if (!info)
1201 goto finished;
1202
1203 ops = info->fbcon_par;
1204
1205 if (!ops)
1206 goto finished;
1207
1208 if (CON_IS_VISIBLE(vc))
1209 fbcon_del_cursor_timer(info);
1210
1211 ops->flags &= ~FBCON_FLAGS_INIT;
1212 finished:
1213
1214 if (!con_is_bound(&fb_con))
1215 fbcon_exit();
1216
1217 return;
1218 }
1219
1220 /* ====================================================================== */
1221
1222 /* fbcon_XXX routines - interface used by the world
1223 *
1224 * This system is now divided into two levels because of complications
1225 * caused by hardware scrolling. Top level functions:
1226 *
1227 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1228 *
1229 * handles y values in range [0, scr_height-1] that correspond to real
1230 * screen positions. y_wrap shift means that first line of bitmap may be
1231 * anywhere on this display. These functions convert lineoffsets to
1232 * bitmap offsets and deal with the wrap-around case by splitting blits.
1233 *
1234 * fbcon_bmove_physical_8() -- These functions fast implementations
1235 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1236 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1237 *
1238 * WARNING:
1239 *
1240 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1241 * Implies should only really hardware scroll in rows. Only reason for
1242 * restriction is simplicity & efficiency at the moment.
1243 */
1244
1245 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1246 int width)
1247 {
1248 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1249 struct fbcon_ops *ops = info->fbcon_par;
1250
1251 struct display *p = &fb_display[vc->vc_num];
1252 u_int y_break;
1253
1254 if (fbcon_is_inactive(vc, info))
1255 return;
1256
1257 if (!height || !width)
1258 return;
1259
1260 /* Split blits that cross physical y_wrap boundary */
1261
1262 y_break = p->vrows - p->yscroll;
1263 if (sy < y_break && sy + height - 1 >= y_break) {
1264 u_int b = y_break - sy;
1265 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267 width);
1268 } else
1269 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270 }
1271
1272 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273 int count, int ypos, int xpos)
1274 {
1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276 struct display *p = &fb_display[vc->vc_num];
1277 struct fbcon_ops *ops = info->fbcon_par;
1278
1279 if (!fbcon_is_inactive(vc, info))
1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281 get_color(vc, info, scr_readw(s), 1),
1282 get_color(vc, info, scr_readw(s), 0));
1283 }
1284
1285 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286 {
1287 unsigned short chr;
1288
1289 scr_writew(c, &chr);
1290 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291 }
1292
1293 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294 {
1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->clear_margins(vc, info, bottom_only);
1300 }
1301
1302 static void fbcon_cursor(struct vc_data *vc, int mode)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1306 int y;
1307 int c = scr_readw((u16 *) vc->vc_pos);
1308
1309 if (fbcon_is_inactive(vc, info))
1310 return;
1311
1312 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1313 if (mode & CM_SOFTBACK) {
1314 mode &= ~CM_SOFTBACK;
1315 y = softback_lines;
1316 } else {
1317 if (softback_lines)
1318 fbcon_set_origin(vc);
1319 y = 0;
1320 }
1321
1322 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1323 get_color(vc, info, c, 0));
1324 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1325 }
1326
1327 static int scrollback_phys_max = 0;
1328 static int scrollback_max = 0;
1329 static int scrollback_current = 0;
1330
1331 /*
1332 * If no vc is existent yet, just set struct display
1333 */
1334 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1335 int unit)
1336 {
1337 struct display *p = &fb_display[unit];
1338 struct display *t = &fb_display[fg_console];
1339
1340 if (var_to_display(p, var, info))
1341 return;
1342
1343 p->fontdata = t->fontdata;
1344 p->userfont = t->userfont;
1345 if (p->userfont)
1346 REFCOUNT(p->fontdata)++;
1347 }
1348
1349 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1350 struct vc_data *vc)
1351 {
1352 struct display *p = &fb_display[vc->vc_num], *t;
1353 struct vc_data **default_mode = vc->vc_display_fg;
1354 struct vc_data *svc = *default_mode;
1355 struct fbcon_ops *ops = info->fbcon_par;
1356 int rows, cols, charcnt = 256;
1357
1358 if (var_to_display(p, var, info))
1359 return;
1360 t = &fb_display[svc->vc_num];
1361 if (!vc->vc_font.data) {
1362 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1363 vc->vc_font.width = (*default_mode)->vc_font.width;
1364 vc->vc_font.height = (*default_mode)->vc_font.height;
1365 p->userfont = t->userfont;
1366 if (p->userfont)
1367 REFCOUNT(p->fontdata)++;
1368 }
1369 if (p->userfont)
1370 charcnt = FNTCHARCNT(p->fontdata);
1371
1372 var->activate = FB_ACTIVATE_NOW;
1373 info->var.activate = var->activate;
1374 var->yoffset = info->var.yoffset;
1375 var->xoffset = info->var.xoffset;
1376 fb_set_var(info, var);
1377 ops->var = info->var;
1378 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1379 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1380 if (charcnt == 256) {
1381 vc->vc_hi_font_mask = 0;
1382 } else {
1383 vc->vc_hi_font_mask = 0x100;
1384 if (vc->vc_can_do_color)
1385 vc->vc_complement_mask <<= 1;
1386 }
1387
1388 if (!*svc->vc_uni_pagedir_loc)
1389 con_set_default_unimap(svc);
1390 if (!*vc->vc_uni_pagedir_loc)
1391 con_copy_unimap(vc, svc);
1392
1393 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1394 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1395 cols /= vc->vc_font.width;
1396 rows /= vc->vc_font.height;
1397 vc_resize(vc, cols, rows);
1398
1399 if (CON_IS_VISIBLE(vc)) {
1400 update_screen(vc);
1401 if (softback_buf)
1402 fbcon_update_softback(vc);
1403 }
1404 }
1405
1406 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1407 {
1408 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1409 struct fbcon_ops *ops = info->fbcon_par;
1410 struct display *p = &fb_display[vc->vc_num];
1411
1412 p->yscroll += count;
1413 if (p->yscroll >= p->vrows) /* Deal with wrap */
1414 p->yscroll -= p->vrows;
1415 ops->var.xoffset = 0;
1416 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1417 ops->var.vmode |= FB_VMODE_YWRAP;
1418 ops->update_start(info);
1419 scrollback_max += count;
1420 if (scrollback_max > scrollback_phys_max)
1421 scrollback_max = scrollback_phys_max;
1422 scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1426 {
1427 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428 struct fbcon_ops *ops = info->fbcon_par;
1429 struct display *p = &fb_display[vc->vc_num];
1430
1431 p->yscroll -= count;
1432 if (p->yscroll < 0) /* Deal with wrap */
1433 p->yscroll += p->vrows;
1434 ops->var.xoffset = 0;
1435 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1436 ops->var.vmode |= FB_VMODE_YWRAP;
1437 ops->update_start(info);
1438 scrollback_max -= count;
1439 if (scrollback_max < 0)
1440 scrollback_max = 0;
1441 scrollback_current = 0;
1442 }
1443
1444 static __inline__ void ypan_up(struct vc_data *vc, int count)
1445 {
1446 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1447 struct display *p = &fb_display[vc->vc_num];
1448 struct fbcon_ops *ops = info->fbcon_par;
1449
1450 p->yscroll += count;
1451 if (p->yscroll > p->vrows - vc->vc_rows) {
1452 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1453 0, 0, 0, vc->vc_rows, vc->vc_cols);
1454 p->yscroll -= p->vrows - vc->vc_rows;
1455 }
1456
1457 ops->var.xoffset = 0;
1458 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1459 ops->var.vmode &= ~FB_VMODE_YWRAP;
1460 ops->update_start(info);
1461 fbcon_clear_margins(vc, 1);
1462 scrollback_max += count;
1463 if (scrollback_max > scrollback_phys_max)
1464 scrollback_max = scrollback_phys_max;
1465 scrollback_current = 0;
1466 }
1467
1468 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1469 {
1470 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1471 struct fbcon_ops *ops = info->fbcon_par;
1472 struct display *p = &fb_display[vc->vc_num];
1473
1474 p->yscroll += count;
1475
1476 if (p->yscroll > p->vrows - vc->vc_rows) {
1477 p->yscroll -= p->vrows - vc->vc_rows;
1478 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1479 }
1480
1481 ops->var.xoffset = 0;
1482 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1483 ops->var.vmode &= ~FB_VMODE_YWRAP;
1484 ops->update_start(info);
1485 fbcon_clear_margins(vc, 1);
1486 scrollback_max += count;
1487 if (scrollback_max > scrollback_phys_max)
1488 scrollback_max = scrollback_phys_max;
1489 scrollback_current = 0;
1490 }
1491
1492 static __inline__ void ypan_down(struct vc_data *vc, int count)
1493 {
1494 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1495 struct display *p = &fb_display[vc->vc_num];
1496 struct fbcon_ops *ops = info->fbcon_par;
1497
1498 p->yscroll -= count;
1499 if (p->yscroll < 0) {
1500 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1501 0, vc->vc_rows, vc->vc_cols);
1502 p->yscroll += p->vrows - vc->vc_rows;
1503 }
1504
1505 ops->var.xoffset = 0;
1506 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1507 ops->var.vmode &= ~FB_VMODE_YWRAP;
1508 ops->update_start(info);
1509 fbcon_clear_margins(vc, 1);
1510 scrollback_max -= count;
1511 if (scrollback_max < 0)
1512 scrollback_max = 0;
1513 scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1517 {
1518 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519 struct fbcon_ops *ops = info->fbcon_par;
1520 struct display *p = &fb_display[vc->vc_num];
1521
1522 p->yscroll -= count;
1523
1524 if (p->yscroll < 0) {
1525 p->yscroll += p->vrows - vc->vc_rows;
1526 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1527 }
1528
1529 ops->var.xoffset = 0;
1530 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531 ops->var.vmode &= ~FB_VMODE_YWRAP;
1532 ops->update_start(info);
1533 fbcon_clear_margins(vc, 1);
1534 scrollback_max -= count;
1535 if (scrollback_max < 0)
1536 scrollback_max = 0;
1537 scrollback_current = 0;
1538 }
1539
1540 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1541 long delta)
1542 {
1543 int count = vc->vc_rows;
1544 unsigned short *d, *s;
1545 unsigned long n;
1546 int line = 0;
1547
1548 d = (u16 *) softback_curr;
1549 if (d == (u16 *) softback_in)
1550 d = (u16 *) vc->vc_origin;
1551 n = softback_curr + delta * vc->vc_size_row;
1552 softback_lines -= delta;
1553 if (delta < 0) {
1554 if (softback_curr < softback_top && n < softback_buf) {
1555 n += softback_end - softback_buf;
1556 if (n < softback_top) {
1557 softback_lines -=
1558 (softback_top - n) / vc->vc_size_row;
1559 n = softback_top;
1560 }
1561 } else if (softback_curr >= softback_top
1562 && n < softback_top) {
1563 softback_lines -=
1564 (softback_top - n) / vc->vc_size_row;
1565 n = softback_top;
1566 }
1567 } else {
1568 if (softback_curr > softback_in && n >= softback_end) {
1569 n += softback_buf - softback_end;
1570 if (n > softback_in) {
1571 n = softback_in;
1572 softback_lines = 0;
1573 }
1574 } else if (softback_curr <= softback_in && n > softback_in) {
1575 n = softback_in;
1576 softback_lines = 0;
1577 }
1578 }
1579 if (n == softback_curr)
1580 return;
1581 softback_curr = n;
1582 s = (u16 *) softback_curr;
1583 if (s == (u16 *) softback_in)
1584 s = (u16 *) vc->vc_origin;
1585 while (count--) {
1586 unsigned short *start;
1587 unsigned short *le;
1588 unsigned short c;
1589 int x = 0;
1590 unsigned short attr = 1;
1591
1592 start = s;
1593 le = advance_row(s, 1);
1594 do {
1595 c = scr_readw(s);
1596 if (attr != (c & 0xff00)) {
1597 attr = c & 0xff00;
1598 if (s > start) {
1599 fbcon_putcs(vc, start, s - start,
1600 line, x);
1601 x += s - start;
1602 start = s;
1603 }
1604 }
1605 if (c == scr_readw(d)) {
1606 if (s > start) {
1607 fbcon_putcs(vc, start, s - start,
1608 line, x);
1609 x += s - start + 1;
1610 start = s + 1;
1611 } else {
1612 x++;
1613 start++;
1614 }
1615 }
1616 s++;
1617 d++;
1618 } while (s < le);
1619 if (s > start)
1620 fbcon_putcs(vc, start, s - start, line, x);
1621 line++;
1622 if (d == (u16 *) softback_end)
1623 d = (u16 *) softback_buf;
1624 if (d == (u16 *) softback_in)
1625 d = (u16 *) vc->vc_origin;
1626 if (s == (u16 *) softback_end)
1627 s = (u16 *) softback_buf;
1628 if (s == (u16 *) softback_in)
1629 s = (u16 *) vc->vc_origin;
1630 }
1631 }
1632
1633 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1634 int line, int count, int dy)
1635 {
1636 unsigned short *s = (unsigned short *)
1637 (vc->vc_origin + vc->vc_size_row * line);
1638
1639 while (count--) {
1640 unsigned short *start = s;
1641 unsigned short *le = advance_row(s, 1);
1642 unsigned short c;
1643 int x = 0;
1644 unsigned short attr = 1;
1645
1646 do {
1647 c = scr_readw(s);
1648 if (attr != (c & 0xff00)) {
1649 attr = c & 0xff00;
1650 if (s > start) {
1651 fbcon_putcs(vc, start, s - start,
1652 dy, x);
1653 x += s - start;
1654 start = s;
1655 }
1656 }
1657 console_conditional_schedule();
1658 s++;
1659 } while (s < le);
1660 if (s > start)
1661 fbcon_putcs(vc, start, s - start, dy, x);
1662 console_conditional_schedule();
1663 dy++;
1664 }
1665 }
1666
1667 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1668 int line, int count, int offset)
1669 {
1670 unsigned short *d = (unsigned short *)
1671 (vc->vc_origin + vc->vc_size_row * line);
1672 unsigned short *s = d + offset;
1673
1674 while (count--) {
1675 unsigned short *start = s;
1676 unsigned short *le = advance_row(s, 1);
1677 unsigned short c;
1678 int x = 0;
1679 unsigned short attr = 1;
1680
1681 do {
1682 c = scr_readw(s);
1683 if (attr != (c & 0xff00)) {
1684 attr = c & 0xff00;
1685 if (s > start) {
1686 fbcon_putcs(vc, start, s - start,
1687 line, x);
1688 x += s - start;
1689 start = s;
1690 }
1691 }
1692 if (c == scr_readw(d)) {
1693 if (s > start) {
1694 fbcon_putcs(vc, start, s - start,
1695 line, x);
1696 x += s - start + 1;
1697 start = s + 1;
1698 } else {
1699 x++;
1700 start++;
1701 }
1702 }
1703 scr_writew(c, d);
1704 console_conditional_schedule();
1705 s++;
1706 d++;
1707 } while (s < le);
1708 if (s > start)
1709 fbcon_putcs(vc, start, s - start, line, x);
1710 console_conditional_schedule();
1711 if (offset > 0)
1712 line++;
1713 else {
1714 line--;
1715 /* NOTE: We subtract two lines from these pointers */
1716 s -= vc->vc_size_row;
1717 d -= vc->vc_size_row;
1718 }
1719 }
1720 }
1721
1722 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1723 int count)
1724 {
1725 unsigned short *p;
1726
1727 if (vc->vc_num != fg_console)
1728 return;
1729 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1730
1731 while (count) {
1732 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1733 count--;
1734 p = advance_row(p, 1);
1735 softback_in += vc->vc_size_row;
1736 if (softback_in == softback_end)
1737 softback_in = softback_buf;
1738 if (softback_in == softback_top) {
1739 softback_top += vc->vc_size_row;
1740 if (softback_top == softback_end)
1741 softback_top = softback_buf;
1742 }
1743 }
1744 softback_curr = softback_in;
1745 }
1746
1747 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1748 int count)
1749 {
1750 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1751 struct display *p = &fb_display[vc->vc_num];
1752 struct fbcon_ops *ops = info->fbcon_par;
1753 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1754
1755 if (fbcon_is_inactive(vc, info))
1756 return -EINVAL;
1757
1758 fbcon_cursor(vc, CM_ERASE);
1759
1760 /*
1761 * ++Geert: Only use ywrap/ypan if the console is in text mode
1762 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1763 * whole screen (prevents flicker).
1764 */
1765
1766 switch (dir) {
1767 case SM_UP:
1768 if (count > vc->vc_rows) /* Maximum realistic size */
1769 count = vc->vc_rows;
1770 if (softback_top)
1771 fbcon_softback_note(vc, t, count);
1772 if (logo_shown >= 0)
1773 goto redraw_up;
1774 switch (p->scrollmode) {
1775 case SCROLL_MOVE:
1776 ops->bmove(vc, info, t + count, 0, t, 0,
1777 b - t - count, vc->vc_cols);
1778 ops->clear(vc, info, b - count, 0, count,
1779 vc->vc_cols);
1780 break;
1781
1782 case SCROLL_WRAP_MOVE:
1783 if (b - t - count > 3 * vc->vc_rows >> 2) {
1784 if (t > 0)
1785 fbcon_bmove(vc, 0, 0, count, 0, t,
1786 vc->vc_cols);
1787 ywrap_up(vc, count);
1788 if (vc->vc_rows - b > 0)
1789 fbcon_bmove(vc, b - count, 0, b, 0,
1790 vc->vc_rows - b,
1791 vc->vc_cols);
1792 } else if (info->flags & FBINFO_READS_FAST)
1793 fbcon_bmove(vc, t + count, 0, t, 0,
1794 b - t - count, vc->vc_cols);
1795 else
1796 goto redraw_up;
1797 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1798 break;
1799
1800 case SCROLL_PAN_REDRAW:
1801 if ((p->yscroll + count <=
1802 2 * (p->vrows - vc->vc_rows))
1803 && ((!scroll_partial && (b - t == vc->vc_rows))
1804 || (scroll_partial
1805 && (b - t - count >
1806 3 * vc->vc_rows >> 2)))) {
1807 if (t > 0)
1808 fbcon_redraw_move(vc, p, 0, t, count);
1809 ypan_up_redraw(vc, t, count);
1810 if (vc->vc_rows - b > 0)
1811 fbcon_redraw_move(vc, p, b,
1812 vc->vc_rows - b, b);
1813 } else
1814 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1815 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1816 break;
1817
1818 case SCROLL_PAN_MOVE:
1819 if ((p->yscroll + count <=
1820 2 * (p->vrows - vc->vc_rows))
1821 && ((!scroll_partial && (b - t == vc->vc_rows))
1822 || (scroll_partial
1823 && (b - t - count >
1824 3 * vc->vc_rows >> 2)))) {
1825 if (t > 0)
1826 fbcon_bmove(vc, 0, 0, count, 0, t,
1827 vc->vc_cols);
1828 ypan_up(vc, count);
1829 if (vc->vc_rows - b > 0)
1830 fbcon_bmove(vc, b - count, 0, b, 0,
1831 vc->vc_rows - b,
1832 vc->vc_cols);
1833 } else if (info->flags & FBINFO_READS_FAST)
1834 fbcon_bmove(vc, t + count, 0, t, 0,
1835 b - t - count, vc->vc_cols);
1836 else
1837 goto redraw_up;
1838 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1839 break;
1840
1841 case SCROLL_REDRAW:
1842 redraw_up:
1843 fbcon_redraw(vc, p, t, b - t - count,
1844 count * vc->vc_cols);
1845 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1846 scr_memsetw((unsigned short *) (vc->vc_origin +
1847 vc->vc_size_row *
1848 (b - count)),
1849 vc->vc_video_erase_char,
1850 vc->vc_size_row * count);
1851 return 1;
1852 }
1853 break;
1854
1855 case SM_DOWN:
1856 if (count > vc->vc_rows) /* Maximum realistic size */
1857 count = vc->vc_rows;
1858 if (logo_shown >= 0)
1859 goto redraw_down;
1860 switch (p->scrollmode) {
1861 case SCROLL_MOVE:
1862 ops->bmove(vc, info, t, 0, t + count, 0,
1863 b - t - count, vc->vc_cols);
1864 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1865 break;
1866
1867 case SCROLL_WRAP_MOVE:
1868 if (b - t - count > 3 * vc->vc_rows >> 2) {
1869 if (vc->vc_rows - b > 0)
1870 fbcon_bmove(vc, b, 0, b - count, 0,
1871 vc->vc_rows - b,
1872 vc->vc_cols);
1873 ywrap_down(vc, count);
1874 if (t > 0)
1875 fbcon_bmove(vc, count, 0, 0, 0, t,
1876 vc->vc_cols);
1877 } else if (info->flags & FBINFO_READS_FAST)
1878 fbcon_bmove(vc, t, 0, t + count, 0,
1879 b - t - count, vc->vc_cols);
1880 else
1881 goto redraw_down;
1882 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1883 break;
1884
1885 case SCROLL_PAN_MOVE:
1886 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1887 && ((!scroll_partial && (b - t == vc->vc_rows))
1888 || (scroll_partial
1889 && (b - t - count >
1890 3 * vc->vc_rows >> 2)))) {
1891 if (vc->vc_rows - b > 0)
1892 fbcon_bmove(vc, b, 0, b - count, 0,
1893 vc->vc_rows - b,
1894 vc->vc_cols);
1895 ypan_down(vc, count);
1896 if (t > 0)
1897 fbcon_bmove(vc, count, 0, 0, 0, t,
1898 vc->vc_cols);
1899 } else if (info->flags & FBINFO_READS_FAST)
1900 fbcon_bmove(vc, t, 0, t + count, 0,
1901 b - t - count, vc->vc_cols);
1902 else
1903 goto redraw_down;
1904 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1905 break;
1906
1907 case SCROLL_PAN_REDRAW:
1908 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1909 && ((!scroll_partial && (b - t == vc->vc_rows))
1910 || (scroll_partial
1911 && (b - t - count >
1912 3 * vc->vc_rows >> 2)))) {
1913 if (vc->vc_rows - b > 0)
1914 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1915 b - count);
1916 ypan_down_redraw(vc, t, count);
1917 if (t > 0)
1918 fbcon_redraw_move(vc, p, count, t, 0);
1919 } else
1920 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1921 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1922 break;
1923
1924 case SCROLL_REDRAW:
1925 redraw_down:
1926 fbcon_redraw(vc, p, b - 1, b - t - count,
1927 -count * vc->vc_cols);
1928 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1929 scr_memsetw((unsigned short *) (vc->vc_origin +
1930 vc->vc_size_row *
1931 t),
1932 vc->vc_video_erase_char,
1933 vc->vc_size_row * count);
1934 return 1;
1935 }
1936 }
1937 return 0;
1938 }
1939
1940
1941 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1942 int height, int width)
1943 {
1944 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1945 struct display *p = &fb_display[vc->vc_num];
1946
1947 if (fbcon_is_inactive(vc, info))
1948 return;
1949
1950 if (!width || !height)
1951 return;
1952
1953 /* Split blits that cross physical y_wrap case.
1954 * Pathological case involves 4 blits, better to use recursive
1955 * code rather than unrolled case
1956 *
1957 * Recursive invocations don't need to erase the cursor over and
1958 * over again, so we use fbcon_bmove_rec()
1959 */
1960 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1961 p->vrows - p->yscroll);
1962 }
1963
1964 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1965 int dy, int dx, int height, int width, u_int y_break)
1966 {
1967 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1968 struct fbcon_ops *ops = info->fbcon_par;
1969 u_int b;
1970
1971 if (sy < y_break && sy + height > y_break) {
1972 b = y_break - sy;
1973 if (dy < sy) { /* Avoid trashing self */
1974 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1975 y_break);
1976 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1977 height - b, width, y_break);
1978 } else {
1979 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1980 height - b, width, y_break);
1981 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1982 y_break);
1983 }
1984 return;
1985 }
1986
1987 if (dy < y_break && dy + height > y_break) {
1988 b = y_break - dy;
1989 if (dy < sy) { /* Avoid trashing self */
1990 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1991 y_break);
1992 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1993 height - b, width, y_break);
1994 } else {
1995 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1996 height - b, width, y_break);
1997 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1998 y_break);
1999 }
2000 return;
2001 }
2002 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2003 height, width);
2004 }
2005
2006 static __inline__ void updatescrollmode(struct display *p,
2007 struct fb_info *info,
2008 struct vc_data *vc)
2009 {
2010 struct fbcon_ops *ops = info->fbcon_par;
2011 int fh = vc->vc_font.height;
2012 int cap = info->flags;
2013 u16 t = 0;
2014 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2015 info->fix.xpanstep);
2016 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2017 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2018 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2019 info->var.xres_virtual);
2020 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2021 divides(ypan, vc->vc_font.height) && vyres > yres;
2022 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2023 divides(ywrap, vc->vc_font.height) &&
2024 divides(vc->vc_font.height, vyres) &&
2025 divides(vc->vc_font.height, yres);
2026 int reading_fast = cap & FBINFO_READS_FAST;
2027 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2028 !(cap & FBINFO_HWACCEL_DISABLED);
2029 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2030 !(cap & FBINFO_HWACCEL_DISABLED);
2031
2032 p->vrows = vyres/fh;
2033 if (yres > (fh * (vc->vc_rows + 1)))
2034 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2035 if ((yres % fh) && (vyres % fh < yres % fh))
2036 p->vrows--;
2037
2038 if (good_wrap || good_pan) {
2039 if (reading_fast || fast_copyarea)
2040 p->scrollmode = good_wrap ?
2041 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2042 else
2043 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2044 SCROLL_PAN_REDRAW;
2045 } else {
2046 if (reading_fast || (fast_copyarea && !fast_imageblit))
2047 p->scrollmode = SCROLL_MOVE;
2048 else
2049 p->scrollmode = SCROLL_REDRAW;
2050 }
2051 }
2052
2053 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2054 unsigned int height)
2055 {
2056 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2057 struct fbcon_ops *ops = info->fbcon_par;
2058 struct display *p = &fb_display[vc->vc_num];
2059 struct fb_var_screeninfo var = info->var;
2060 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2061
2062 virt_w = FBCON_SWAP(ops->rotate, width, height);
2063 virt_h = FBCON_SWAP(ops->rotate, height, width);
2064 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2065 vc->vc_font.height);
2066 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2067 vc->vc_font.width);
2068 var.xres = virt_w * virt_fw;
2069 var.yres = virt_h * virt_fh;
2070 x_diff = info->var.xres - var.xres;
2071 y_diff = info->var.yres - var.yres;
2072 if (x_diff < 0 || x_diff > virt_fw ||
2073 y_diff < 0 || y_diff > virt_fh) {
2074 struct fb_videomode *mode;
2075
2076 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2077 mode = fb_find_best_mode(&var, &info->modelist);
2078 if (mode == NULL)
2079 return -EINVAL;
2080 display_to_var(&var, p);
2081 fb_videomode_to_var(&var, mode);
2082
2083 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2084 return -EINVAL;
2085
2086 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2087 if (CON_IS_VISIBLE(vc)) {
2088 var.activate = FB_ACTIVATE_NOW |
2089 FB_ACTIVATE_FORCE;
2090 fb_set_var(info, &var);
2091 }
2092 var_to_display(p, &info->var, info);
2093 ops->var = info->var;
2094 }
2095 updatescrollmode(p, info, vc);
2096 return 0;
2097 }
2098
2099 static int fbcon_switch(struct vc_data *vc)
2100 {
2101 struct fb_info *info, *old_info = NULL;
2102 struct fbcon_ops *ops;
2103 struct display *p = &fb_display[vc->vc_num];
2104 struct fb_var_screeninfo var;
2105 int i, prev_console, charcnt = 256;
2106
2107 info = registered_fb[con2fb_map[vc->vc_num]];
2108 ops = info->fbcon_par;
2109
2110 if (softback_top) {
2111 if (softback_lines)
2112 fbcon_set_origin(vc);
2113 softback_top = softback_curr = softback_in = softback_buf;
2114 softback_lines = 0;
2115 fbcon_update_softback(vc);
2116 }
2117
2118 if (logo_shown >= 0) {
2119 struct vc_data *conp2 = vc_cons[logo_shown].d;
2120
2121 if (conp2->vc_top == logo_lines
2122 && conp2->vc_bottom == conp2->vc_rows)
2123 conp2->vc_top = 0;
2124 logo_shown = FBCON_LOGO_CANSHOW;
2125 }
2126
2127 prev_console = ops->currcon;
2128 if (prev_console != -1)
2129 old_info = registered_fb[con2fb_map[prev_console]];
2130 /*
2131 * FIXME: If we have multiple fbdev's loaded, we need to
2132 * update all info->currcon. Perhaps, we can place this
2133 * in a centralized structure, but this might break some
2134 * drivers.
2135 *
2136 * info->currcon = vc->vc_num;
2137 */
2138 for (i = 0; i < FB_MAX; i++) {
2139 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2140 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2141
2142 o->currcon = vc->vc_num;
2143 }
2144 }
2145 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2146 display_to_var(&var, p);
2147 var.activate = FB_ACTIVATE_NOW;
2148
2149 /*
2150 * make sure we don't unnecessarily trip the memcmp()
2151 * in fb_set_var()
2152 */
2153 info->var.activate = var.activate;
2154 var.yoffset = info->var.yoffset;
2155 var.xoffset = info->var.xoffset;
2156 var.vmode = info->var.vmode;
2157 fb_set_var(info, &var);
2158 ops->var = info->var;
2159
2160 if (old_info != NULL && (old_info != info ||
2161 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2162 if (info->fbops->fb_set_par)
2163 info->fbops->fb_set_par(info);
2164
2165 if (old_info != info)
2166 fbcon_del_cursor_timer(old_info);
2167 }
2168
2169 fbcon_add_cursor_timer(info);
2170 set_blitting_type(vc, info);
2171 ops->cursor_reset = 1;
2172
2173 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2174 ops->rotate = FB_ROTATE_UR;
2175 set_blitting_type(vc, info);
2176 }
2177
2178 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2179 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2180
2181 if (p->userfont)
2182 charcnt = FNTCHARCNT(vc->vc_font.data);
2183
2184 if (charcnt > 256)
2185 vc->vc_complement_mask <<= 1;
2186
2187 updatescrollmode(p, info, vc);
2188
2189 switch (p->scrollmode) {
2190 case SCROLL_WRAP_MOVE:
2191 scrollback_phys_max = p->vrows - vc->vc_rows;
2192 break;
2193 case SCROLL_PAN_MOVE:
2194 case SCROLL_PAN_REDRAW:
2195 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2196 if (scrollback_phys_max < 0)
2197 scrollback_phys_max = 0;
2198 break;
2199 default:
2200 scrollback_phys_max = 0;
2201 break;
2202 }
2203
2204 scrollback_max = 0;
2205 scrollback_current = 0;
2206
2207 if (!fbcon_is_inactive(vc, info)) {
2208 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2209 ops->update_start(info);
2210 }
2211
2212 fbcon_set_palette(vc, color_table);
2213 fbcon_clear_margins(vc, 0);
2214
2215 if (logo_shown == FBCON_LOGO_DRAW) {
2216
2217 logo_shown = fg_console;
2218 /* This is protected above by initmem_freed */
2219 fb_show_logo(info, ops->rotate);
2220 update_region(vc,
2221 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2222 vc->vc_size_row * (vc->vc_bottom -
2223 vc->vc_top) / 2);
2224 return 0;
2225 }
2226 return 1;
2227 }
2228
2229 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2230 int blank)
2231 {
2232 if (blank) {
2233 unsigned short charmask = vc->vc_hi_font_mask ?
2234 0x1ff : 0xff;
2235 unsigned short oldc;
2236
2237 oldc = vc->vc_video_erase_char;
2238 vc->vc_video_erase_char &= charmask;
2239 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2240 vc->vc_video_erase_char = oldc;
2241 }
2242 }
2243
2244 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2245 {
2246 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2247 struct fbcon_ops *ops = info->fbcon_par;
2248
2249 if (mode_switch) {
2250 struct fb_var_screeninfo var = info->var;
2251
2252 ops->graphics = 1;
2253
2254 if (!blank) {
2255 if (info->fbops->fb_save_state)
2256 info->fbops->fb_save_state(info);
2257 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2258 fb_set_var(info, &var);
2259 ops->graphics = 0;
2260 ops->var = info->var;
2261 } else if (info->fbops->fb_restore_state)
2262 info->fbops->fb_restore_state(info);
2263 }
2264
2265 if (!fbcon_is_inactive(vc, info)) {
2266 if (ops->blank_state != blank) {
2267 ops->blank_state = blank;
2268 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2269 ops->cursor_flash = (!blank);
2270
2271 if (fb_blank(info, blank))
2272 fbcon_generic_blank(vc, info, blank);
2273 }
2274
2275 if (!blank)
2276 update_screen(vc);
2277 }
2278
2279 if (!blank)
2280 fbcon_add_cursor_timer(info);
2281 else
2282 fbcon_del_cursor_timer(info);
2283
2284 return 0;
2285 }
2286
2287 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2288 {
2289 u8 *fontdata = vc->vc_font.data;
2290 u8 *data = font->data;
2291 int i, j;
2292
2293 font->width = vc->vc_font.width;
2294 font->height = vc->vc_font.height;
2295 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2296 if (!font->data)
2297 return 0;
2298
2299 if (font->width <= 8) {
2300 j = vc->vc_font.height;
2301 for (i = 0; i < font->charcount; i++) {
2302 memcpy(data, fontdata, j);
2303 memset(data + j, 0, 32 - j);
2304 data += 32;
2305 fontdata += j;
2306 }
2307 } else if (font->width <= 16) {
2308 j = vc->vc_font.height * 2;
2309 for (i = 0; i < font->charcount; i++) {
2310 memcpy(data, fontdata, j);
2311 memset(data + j, 0, 64 - j);
2312 data += 64;
2313 fontdata += j;
2314 }
2315 } else if (font->width <= 24) {
2316 for (i = 0; i < font->charcount; i++) {
2317 for (j = 0; j < vc->vc_font.height; j++) {
2318 *data++ = fontdata[0];
2319 *data++ = fontdata[1];
2320 *data++ = fontdata[2];
2321 fontdata += sizeof(u32);
2322 }
2323 memset(data, 0, 3 * (32 - j));
2324 data += 3 * (32 - j);
2325 }
2326 } else {
2327 j = vc->vc_font.height * 4;
2328 for (i = 0; i < font->charcount; i++) {
2329 memcpy(data, fontdata, j);
2330 memset(data + j, 0, 128 - j);
2331 data += 128;
2332 fontdata += j;
2333 }
2334 }
2335 return 0;
2336 }
2337
2338 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2339 const u8 * data, int userfont)
2340 {
2341 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2342 struct fbcon_ops *ops = info->fbcon_par;
2343 struct display *p = &fb_display[vc->vc_num];
2344 int resize;
2345 int cnt;
2346 char *old_data = NULL;
2347
2348 if (CON_IS_VISIBLE(vc) && softback_lines)
2349 fbcon_set_origin(vc);
2350
2351 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2352 if (p->userfont)
2353 old_data = vc->vc_font.data;
2354 if (userfont)
2355 cnt = FNTCHARCNT(data);
2356 else
2357 cnt = 256;
2358 vc->vc_font.data = (void *)(p->fontdata = data);
2359 if ((p->userfont = userfont))
2360 REFCOUNT(data)++;
2361 vc->vc_font.width = w;
2362 vc->vc_font.height = h;
2363 if (vc->vc_hi_font_mask && cnt == 256) {
2364 vc->vc_hi_font_mask = 0;
2365 if (vc->vc_can_do_color) {
2366 vc->vc_complement_mask >>= 1;
2367 vc->vc_s_complement_mask >>= 1;
2368 }
2369
2370 /* ++Edmund: reorder the attribute bits */
2371 if (vc->vc_can_do_color) {
2372 unsigned short *cp =
2373 (unsigned short *) vc->vc_origin;
2374 int count = vc->vc_screenbuf_size / 2;
2375 unsigned short c;
2376 for (; count > 0; count--, cp++) {
2377 c = scr_readw(cp);
2378 scr_writew(((c & 0xfe00) >> 1) |
2379 (c & 0xff), cp);
2380 }
2381 c = vc->vc_video_erase_char;
2382 vc->vc_video_erase_char =
2383 ((c & 0xfe00) >> 1) | (c & 0xff);
2384 vc->vc_attr >>= 1;
2385 }
2386 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2387 vc->vc_hi_font_mask = 0x100;
2388 if (vc->vc_can_do_color) {
2389 vc->vc_complement_mask <<= 1;
2390 vc->vc_s_complement_mask <<= 1;
2391 }
2392
2393 /* ++Edmund: reorder the attribute bits */
2394 {
2395 unsigned short *cp =
2396 (unsigned short *) vc->vc_origin;
2397 int count = vc->vc_screenbuf_size / 2;
2398 unsigned short c;
2399 for (; count > 0; count--, cp++) {
2400 unsigned short newc;
2401 c = scr_readw(cp);
2402 if (vc->vc_can_do_color)
2403 newc =
2404 ((c & 0xff00) << 1) | (c &
2405 0xff);
2406 else
2407 newc = c & ~0x100;
2408 scr_writew(newc, cp);
2409 }
2410 c = vc->vc_video_erase_char;
2411 if (vc->vc_can_do_color) {
2412 vc->vc_video_erase_char =
2413 ((c & 0xff00) << 1) | (c & 0xff);
2414 vc->vc_attr <<= 1;
2415 } else
2416 vc->vc_video_erase_char = c & ~0x100;
2417 }
2418
2419 }
2420
2421 if (resize) {
2422 int cols, rows;
2423
2424 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2425 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2426 cols /= w;
2427 rows /= h;
2428 vc_resize(vc, cols, rows);
2429 if (CON_IS_VISIBLE(vc) && softback_buf)
2430 fbcon_update_softback(vc);
2431 } else if (CON_IS_VISIBLE(vc)
2432 && vc->vc_mode == KD_TEXT) {
2433 fbcon_clear_margins(vc, 0);
2434 update_screen(vc);
2435 }
2436
2437 if (old_data && (--REFCOUNT(old_data) == 0))
2438 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2439 return 0;
2440 }
2441
2442 static int fbcon_copy_font(struct vc_data *vc, int con)
2443 {
2444 struct display *od = &fb_display[con];
2445 struct console_font *f = &vc->vc_font;
2446
2447 if (od->fontdata == f->data)
2448 return 0; /* already the same font... */
2449 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2450 }
2451
2452 /*
2453 * User asked to set font; we are guaranteed that
2454 * a) width and height are in range 1..32
2455 * b) charcount does not exceed 512
2456 * but lets not assume that, since someone might someday want to use larger
2457 * fonts. And charcount of 512 is small for unicode support.
2458 *
2459 * However, user space gives the font in 32 rows , regardless of
2460 * actual font height. So a new API is needed if support for larger fonts
2461 * is ever implemented.
2462 */
2463
2464 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2465 {
2466 unsigned charcount = font->charcount;
2467 int w = font->width;
2468 int h = font->height;
2469 int size;
2470 int i, csum;
2471 u8 *new_data, *data = font->data;
2472 int pitch = (font->width+7) >> 3;
2473
2474 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2475 * If not this check should be changed to charcount < 256 */
2476 if (charcount != 256 && charcount != 512)
2477 return -EINVAL;
2478
2479 size = h * pitch * charcount;
2480
2481 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2482
2483 if (!new_data)
2484 return -ENOMEM;
2485
2486 new_data += FONT_EXTRA_WORDS * sizeof(int);
2487 FNTSIZE(new_data) = size;
2488 FNTCHARCNT(new_data) = charcount;
2489 REFCOUNT(new_data) = 0; /* usage counter */
2490 for (i=0; i< charcount; i++) {
2491 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2492 }
2493
2494 /* Since linux has a nice crc32 function use it for counting font
2495 * checksums. */
2496 csum = crc32(0, new_data, size);
2497
2498 FNTSUM(new_data) = csum;
2499 /* Check if the same font is on some other console already */
2500 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2501 struct vc_data *tmp = vc_cons[i].d;
2502
2503 if (fb_display[i].userfont &&
2504 fb_display[i].fontdata &&
2505 FNTSUM(fb_display[i].fontdata) == csum &&
2506 FNTSIZE(fb_display[i].fontdata) == size &&
2507 tmp->vc_font.width == w &&
2508 !memcmp(fb_display[i].fontdata, new_data, size)) {
2509 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2510 new_data = (u8 *)fb_display[i].fontdata;
2511 break;
2512 }
2513 }
2514 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2515 }
2516
2517 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2518 {
2519 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2520 const struct font_desc *f;
2521
2522 if (!name)
2523 f = get_default_font(info->var.xres, info->var.yres);
2524 else if (!(f = find_font(name)))
2525 return -ENOENT;
2526
2527 font->width = f->width;
2528 font->height = f->height;
2529 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2530 }
2531
2532 static u16 palette_red[16];
2533 static u16 palette_green[16];
2534 static u16 palette_blue[16];
2535
2536 static struct fb_cmap palette_cmap = {
2537 0, 16, palette_red, palette_green, palette_blue, NULL
2538 };
2539
2540 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2541 {
2542 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2543 int i, j, k, depth;
2544 u8 val;
2545
2546 if (fbcon_is_inactive(vc, info))
2547 return -EINVAL;
2548
2549 if (!CON_IS_VISIBLE(vc))
2550 return 0;
2551
2552 depth = fb_get_color_depth(&info->var, &info->fix);
2553 if (depth > 3) {
2554 for (i = j = 0; i < 16; i++) {
2555 k = table[i];
2556 val = vc->vc_palette[j++];
2557 palette_red[k] = (val << 8) | val;
2558 val = vc->vc_palette[j++];
2559 palette_green[k] = (val << 8) | val;
2560 val = vc->vc_palette[j++];
2561 palette_blue[k] = (val << 8) | val;
2562 }
2563 palette_cmap.len = 16;
2564 palette_cmap.start = 0;
2565 /*
2566 * If framebuffer is capable of less than 16 colors,
2567 * use default palette of fbcon.
2568 */
2569 } else
2570 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2571
2572 return fb_set_cmap(&palette_cmap, info);
2573 }
2574
2575 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2576 {
2577 unsigned long p;
2578 int line;
2579
2580 if (vc->vc_num != fg_console || !softback_lines)
2581 return (u16 *) (vc->vc_origin + offset);
2582 line = offset / vc->vc_size_row;
2583 if (line >= softback_lines)
2584 return (u16 *) (vc->vc_origin + offset -
2585 softback_lines * vc->vc_size_row);
2586 p = softback_curr + offset;
2587 if (p >= softback_end)
2588 p += softback_buf - softback_end;
2589 return (u16 *) p;
2590 }
2591
2592 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2593 int *px, int *py)
2594 {
2595 unsigned long ret;
2596 int x, y;
2597
2598 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2599 unsigned long offset = (pos - vc->vc_origin) / 2;
2600
2601 x = offset % vc->vc_cols;
2602 y = offset / vc->vc_cols;
2603 if (vc->vc_num == fg_console)
2604 y += softback_lines;
2605 ret = pos + (vc->vc_cols - x) * 2;
2606 } else if (vc->vc_num == fg_console && softback_lines) {
2607 unsigned long offset = pos - softback_curr;
2608
2609 if (pos < softback_curr)
2610 offset += softback_end - softback_buf;
2611 offset /= 2;
2612 x = offset % vc->vc_cols;
2613 y = offset / vc->vc_cols;
2614 ret = pos + (vc->vc_cols - x) * 2;
2615 if (ret == softback_end)
2616 ret = softback_buf;
2617 if (ret == softback_in)
2618 ret = vc->vc_origin;
2619 } else {
2620 /* Should not happen */
2621 x = y = 0;
2622 ret = vc->vc_origin;
2623 }
2624 if (px)
2625 *px = x;
2626 if (py)
2627 *py = y;
2628 return ret;
2629 }
2630
2631 /* As we might be inside of softback, we may work with non-contiguous buffer,
2632 that's why we have to use a separate routine. */
2633 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2634 {
2635 while (cnt--) {
2636 u16 a = scr_readw(p);
2637 if (!vc->vc_can_do_color)
2638 a ^= 0x0800;
2639 else if (vc->vc_hi_font_mask == 0x100)
2640 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2641 (((a) & 0x0e00) << 4);
2642 else
2643 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2644 (((a) & 0x0700) << 4);
2645 scr_writew(a, p++);
2646 if (p == (u16 *) softback_end)
2647 p = (u16 *) softback_buf;
2648 if (p == (u16 *) softback_in)
2649 p = (u16 *) vc->vc_origin;
2650 }
2651 }
2652
2653 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2654 {
2655 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2656 struct fbcon_ops *ops = info->fbcon_par;
2657 struct display *p = &fb_display[fg_console];
2658 int offset, limit, scrollback_old;
2659
2660 if (softback_top) {
2661 if (vc->vc_num != fg_console)
2662 return 0;
2663 if (vc->vc_mode != KD_TEXT || !lines)
2664 return 0;
2665 if (logo_shown >= 0) {
2666 struct vc_data *conp2 = vc_cons[logo_shown].d;
2667
2668 if (conp2->vc_top == logo_lines
2669 && conp2->vc_bottom == conp2->vc_rows)
2670 conp2->vc_top = 0;
2671 if (logo_shown == vc->vc_num) {
2672 unsigned long p, q;
2673 int i;
2674
2675 p = softback_in;
2676 q = vc->vc_origin +
2677 logo_lines * vc->vc_size_row;
2678 for (i = 0; i < logo_lines; i++) {
2679 if (p == softback_top)
2680 break;
2681 if (p == softback_buf)
2682 p = softback_end;
2683 p -= vc->vc_size_row;
2684 q -= vc->vc_size_row;
2685 scr_memcpyw((u16 *) q, (u16 *) p,
2686 vc->vc_size_row);
2687 }
2688 softback_in = softback_curr = p;
2689 update_region(vc, vc->vc_origin,
2690 logo_lines * vc->vc_cols);
2691 }
2692 logo_shown = FBCON_LOGO_CANSHOW;
2693 }
2694 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2695 fbcon_redraw_softback(vc, p, lines);
2696 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2697 return 0;
2698 }
2699
2700 if (!scrollback_phys_max)
2701 return -ENOSYS;
2702
2703 scrollback_old = scrollback_current;
2704 scrollback_current -= lines;
2705 if (scrollback_current < 0)
2706 scrollback_current = 0;
2707 else if (scrollback_current > scrollback_max)
2708 scrollback_current = scrollback_max;
2709 if (scrollback_current == scrollback_old)
2710 return 0;
2711
2712 if (fbcon_is_inactive(vc, info))
2713 return 0;
2714
2715 fbcon_cursor(vc, CM_ERASE);
2716
2717 offset = p->yscroll - scrollback_current;
2718 limit = p->vrows;
2719 switch (p->scrollmode) {
2720 case SCROLL_WRAP_MOVE:
2721 info->var.vmode |= FB_VMODE_YWRAP;
2722 break;
2723 case SCROLL_PAN_MOVE:
2724 case SCROLL_PAN_REDRAW:
2725 limit -= vc->vc_rows;
2726 info->var.vmode &= ~FB_VMODE_YWRAP;
2727 break;
2728 }
2729 if (offset < 0)
2730 offset += limit;
2731 else if (offset >= limit)
2732 offset -= limit;
2733
2734 ops->var.xoffset = 0;
2735 ops->var.yoffset = offset * vc->vc_font.height;
2736 ops->update_start(info);
2737
2738 if (!scrollback_current)
2739 fbcon_cursor(vc, CM_DRAW);
2740 return 0;
2741 }
2742
2743 static int fbcon_set_origin(struct vc_data *vc)
2744 {
2745 if (softback_lines)
2746 fbcon_scrolldelta(vc, softback_lines);
2747 return 0;
2748 }
2749
2750 static void fbcon_suspended(struct fb_info *info)
2751 {
2752 struct vc_data *vc = NULL;
2753 struct fbcon_ops *ops = info->fbcon_par;
2754
2755 if (!ops || ops->currcon < 0)
2756 return;
2757 vc = vc_cons[ops->currcon].d;
2758
2759 /* Clear cursor, restore saved data */
2760 fbcon_cursor(vc, CM_ERASE);
2761 }
2762
2763 static void fbcon_resumed(struct fb_info *info)
2764 {
2765 struct vc_data *vc;
2766 struct fbcon_ops *ops = info->fbcon_par;
2767
2768 if (!ops || ops->currcon < 0)
2769 return;
2770 vc = vc_cons[ops->currcon].d;
2771
2772 update_screen(vc);
2773 }
2774
2775 static void fbcon_modechanged(struct fb_info *info)
2776 {
2777 struct fbcon_ops *ops = info->fbcon_par;
2778 struct vc_data *vc;
2779 struct display *p;
2780 int rows, cols;
2781
2782 if (!ops || ops->currcon < 0)
2783 return;
2784 vc = vc_cons[ops->currcon].d;
2785 if (vc->vc_mode != KD_TEXT ||
2786 registered_fb[con2fb_map[ops->currcon]] != info)
2787 return;
2788
2789 p = &fb_display[vc->vc_num];
2790 set_blitting_type(vc, info);
2791
2792 if (CON_IS_VISIBLE(vc)) {
2793 var_to_display(p, &info->var, info);
2794 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2795 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2796 cols /= vc->vc_font.width;
2797 rows /= vc->vc_font.height;
2798 vc_resize(vc, cols, rows);
2799 updatescrollmode(p, info, vc);
2800 scrollback_max = 0;
2801 scrollback_current = 0;
2802
2803 if (!fbcon_is_inactive(vc, info)) {
2804 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2805 ops->update_start(info);
2806 }
2807
2808 fbcon_set_palette(vc, color_table);
2809 update_screen(vc);
2810 if (softback_buf)
2811 fbcon_update_softback(vc);
2812 }
2813 }
2814
2815 static void fbcon_set_all_vcs(struct fb_info *info)
2816 {
2817 struct fbcon_ops *ops = info->fbcon_par;
2818 struct vc_data *vc;
2819 struct display *p;
2820 int i, rows, cols;
2821
2822 if (!ops || ops->currcon < 0)
2823 return;
2824
2825 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2826 vc = vc_cons[i].d;
2827 if (!vc || vc->vc_mode != KD_TEXT ||
2828 registered_fb[con2fb_map[i]] != info)
2829 continue;
2830
2831 p = &fb_display[vc->vc_num];
2832 set_blitting_type(vc, info);
2833 var_to_display(p, &info->var, info);
2834 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2835 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2836 cols /= vc->vc_font.width;
2837 rows /= vc->vc_font.height;
2838 vc_resize(vc, cols, rows);
2839
2840 if (CON_IS_VISIBLE(vc)) {
2841 updatescrollmode(p, info, vc);
2842 scrollback_max = 0;
2843 scrollback_current = 0;
2844
2845 if (!fbcon_is_inactive(vc, info)) {
2846 ops->var.xoffset = ops->var.yoffset =
2847 p->yscroll = 0;
2848 ops->update_start(info);
2849 }
2850
2851 fbcon_set_palette(vc, color_table);
2852 update_screen(vc);
2853 if (softback_buf)
2854 fbcon_update_softback(vc);
2855 }
2856 }
2857
2858 ops->p = &fb_display[ops->currcon];
2859 }
2860
2861 static int fbcon_mode_deleted(struct fb_info *info,
2862 struct fb_videomode *mode)
2863 {
2864 struct fb_info *fb_info;
2865 struct display *p;
2866 int i, j, found = 0;
2867
2868 /* before deletion, ensure that mode is not in use */
2869 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2870 j = con2fb_map[i];
2871 if (j == -1)
2872 continue;
2873 fb_info = registered_fb[j];
2874 if (fb_info != info)
2875 continue;
2876 p = &fb_display[i];
2877 if (!p || !p->mode)
2878 continue;
2879 if (fb_mode_is_equal(p->mode, mode)) {
2880 found = 1;
2881 break;
2882 }
2883 }
2884 return found;
2885 }
2886
2887 static int fbcon_fb_unregistered(int idx)
2888 {
2889 int i;
2890
2891 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2892 if (con2fb_map[i] == idx)
2893 con2fb_map[i] = -1;
2894 }
2895
2896 if (idx == info_idx) {
2897 info_idx = -1;
2898
2899 for (i = 0; i < FB_MAX; i++) {
2900 if (registered_fb[i] != NULL) {
2901 info_idx = i;
2902 break;
2903 }
2904 }
2905 }
2906
2907 if (info_idx != -1) {
2908 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2909 if (con2fb_map[i] == -1)
2910 con2fb_map[i] = info_idx;
2911 }
2912 }
2913
2914 if (!num_registered_fb)
2915 unregister_con_driver(&fb_con);
2916
2917 return 0;
2918 }
2919
2920 static int fbcon_fb_registered(int idx)
2921 {
2922 int ret = 0, i;
2923
2924 if (info_idx == -1) {
2925 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2926 if (con2fb_map_boot[i] == idx) {
2927 info_idx = idx;
2928 break;
2929 }
2930 }
2931
2932 if (info_idx != -1)
2933 ret = fbcon_takeover(1);
2934 } else {
2935 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2936 if (con2fb_map_boot[i] == idx &&
2937 con2fb_map[i] == -1)
2938 set_con2fb_map(i, idx, 0);
2939 }
2940 }
2941
2942 return ret;
2943 }
2944
2945 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2946 {
2947 struct fbcon_ops *ops = info->fbcon_par;
2948 struct vc_data *vc;
2949
2950 if (!ops || ops->currcon < 0)
2951 return;
2952
2953 vc = vc_cons[ops->currcon].d;
2954 if (vc->vc_mode != KD_TEXT ||
2955 registered_fb[con2fb_map[ops->currcon]] != info)
2956 return;
2957
2958 if (CON_IS_VISIBLE(vc)) {
2959 if (blank)
2960 do_blank_screen(0);
2961 else
2962 do_unblank_screen(0);
2963 }
2964 ops->blank_state = blank;
2965 }
2966
2967 static void fbcon_new_modelist(struct fb_info *info)
2968 {
2969 int i;
2970 struct vc_data *vc;
2971 struct fb_var_screeninfo var;
2972 struct fb_videomode *mode;
2973
2974 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2975 if (registered_fb[con2fb_map[i]] != info)
2976 continue;
2977 if (!fb_display[i].mode)
2978 continue;
2979 vc = vc_cons[i].d;
2980 display_to_var(&var, &fb_display[i]);
2981 mode = fb_find_nearest_mode(fb_display[i].mode,
2982 &info->modelist);
2983 fb_videomode_to_var(&var, mode);
2984
2985 if (vc)
2986 fbcon_set_disp(info, &var, vc);
2987 else
2988 fbcon_preset_disp(info, &var, i);
2989
2990 }
2991 }
2992
2993 static int fbcon_event_notify(struct notifier_block *self,
2994 unsigned long action, void *data)
2995 {
2996 struct fb_event *event = data;
2997 struct fb_info *info = event->info;
2998 struct fb_videomode *mode;
2999 struct fb_con2fbmap *con2fb;
3000 int ret = 0;
3001
3002 /*
3003 * ignore all events except driver registration and deregistration
3004 * if fbcon is not active
3005 */
3006 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3007 action == FB_EVENT_FB_UNREGISTERED))
3008 goto done;
3009
3010 switch(action) {
3011 case FB_EVENT_SUSPEND:
3012 fbcon_suspended(info);
3013 break;
3014 case FB_EVENT_RESUME:
3015 fbcon_resumed(info);
3016 break;
3017 case FB_EVENT_MODE_CHANGE:
3018 fbcon_modechanged(info);
3019 break;
3020 case FB_EVENT_MODE_CHANGE_ALL:
3021 fbcon_set_all_vcs(info);
3022 break;
3023 case FB_EVENT_MODE_DELETE:
3024 mode = event->data;
3025 ret = fbcon_mode_deleted(info, mode);
3026 break;
3027 case FB_EVENT_FB_REGISTERED:
3028 ret = fbcon_fb_registered(info->node);
3029 break;
3030 case FB_EVENT_FB_UNREGISTERED:
3031 ret = fbcon_fb_unregistered(info->node);
3032 break;
3033 case FB_EVENT_SET_CONSOLE_MAP:
3034 con2fb = event->data;
3035 ret = set_con2fb_map(con2fb->console - 1,
3036 con2fb->framebuffer, 1);
3037 break;
3038 case FB_EVENT_GET_CONSOLE_MAP:
3039 con2fb = event->data;
3040 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3041 break;
3042 case FB_EVENT_BLANK:
3043 fbcon_fb_blanked(info, *(int *)event->data);
3044 break;
3045 case FB_EVENT_NEW_MODELIST:
3046 fbcon_new_modelist(info);
3047 break;
3048 }
3049
3050 done:
3051 return ret;
3052 }
3053
3054 /*
3055 * The console `switch' structure for the frame buffer based console
3056 */
3057
3058 static const struct consw fb_con = {
3059 .owner = THIS_MODULE,
3060 .con_startup = fbcon_startup,
3061 .con_init = fbcon_init,
3062 .con_deinit = fbcon_deinit,
3063 .con_clear = fbcon_clear,
3064 .con_putc = fbcon_putc,
3065 .con_putcs = fbcon_putcs,
3066 .con_cursor = fbcon_cursor,
3067 .con_scroll = fbcon_scroll,
3068 .con_bmove = fbcon_bmove,
3069 .con_switch = fbcon_switch,
3070 .con_blank = fbcon_blank,
3071 .con_font_set = fbcon_set_font,
3072 .con_font_get = fbcon_get_font,
3073 .con_font_default = fbcon_set_def_font,
3074 .con_font_copy = fbcon_copy_font,
3075 .con_set_palette = fbcon_set_palette,
3076 .con_scrolldelta = fbcon_scrolldelta,
3077 .con_set_origin = fbcon_set_origin,
3078 .con_invert_region = fbcon_invert_region,
3079 .con_screen_pos = fbcon_screen_pos,
3080 .con_getxy = fbcon_getxy,
3081 .con_resize = fbcon_resize,
3082 };
3083
3084 static struct notifier_block fbcon_event_notifier = {
3085 .notifier_call = fbcon_event_notify,
3086 };
3087
3088 static ssize_t store_rotate(struct class_device *class_device,
3089 const char *buf, size_t count)
3090 {
3091 struct fb_info *info;
3092 int rotate, idx;
3093 char **last = NULL;
3094
3095 if (fbcon_has_exited)
3096 return count;
3097
3098 acquire_console_sem();
3099 idx = con2fb_map[fg_console];
3100
3101 if (idx == -1 || registered_fb[idx] == NULL)
3102 goto err;
3103
3104 info = registered_fb[idx];
3105 rotate = simple_strtoul(buf, last, 0);
3106 fbcon_rotate(info, rotate);
3107 err:
3108 release_console_sem();
3109 return count;
3110 }
3111
3112 static ssize_t store_rotate_all(struct class_device *class_device,
3113 const char *buf, size_t count)
3114 {
3115 struct fb_info *info;
3116 int rotate, idx;
3117 char **last = NULL;
3118
3119 if (fbcon_has_exited)
3120 return count;
3121
3122 acquire_console_sem();
3123 idx = con2fb_map[fg_console];
3124
3125 if (idx == -1 || registered_fb[idx] == NULL)
3126 goto err;
3127
3128 info = registered_fb[idx];
3129 rotate = simple_strtoul(buf, last, 0);
3130 fbcon_rotate_all(info, rotate);
3131 err:
3132 release_console_sem();
3133 return count;
3134 }
3135
3136 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3137 {
3138 struct fb_info *info;
3139 int rotate = 0, idx;
3140
3141 if (fbcon_has_exited)
3142 return 0;
3143
3144 acquire_console_sem();
3145 idx = con2fb_map[fg_console];
3146
3147 if (idx == -1 || registered_fb[idx] == NULL)
3148 goto err;
3149
3150 info = registered_fb[idx];
3151 rotate = fbcon_get_rotate(info);
3152 err:
3153 release_console_sem();
3154 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3155 }
3156
3157 static struct class_device_attribute class_device_attrs[] = {
3158 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3159 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3160 };
3161
3162 static int fbcon_init_class_device(void)
3163 {
3164 int i;
3165
3166 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3167 class_device_create_file(fbcon_class_device,
3168 &class_device_attrs[i]);
3169 return 0;
3170 }
3171
3172 static void fbcon_start(void)
3173 {
3174 if (num_registered_fb) {
3175 int i;
3176
3177 acquire_console_sem();
3178
3179 for (i = 0; i < FB_MAX; i++) {
3180 if (registered_fb[i] != NULL) {
3181 info_idx = i;
3182 break;
3183 }
3184 }
3185
3186 release_console_sem();
3187 fbcon_takeover(0);
3188 }
3189 }
3190
3191 static void fbcon_exit(void)
3192 {
3193 struct fb_info *info;
3194 int i, j, mapped;
3195
3196 if (fbcon_has_exited)
3197 return;
3198
3199 #ifdef CONFIG_ATARI
3200 free_irq(IRQ_AUTO_4, fbcon_vbl_handler);
3201 #endif
3202 #ifdef CONFIG_MAC
3203 if (MACH_IS_MAC && vbl_detected)
3204 free_irq(IRQ_MAC_VBL, fbcon_vbl_handler);
3205 #endif
3206
3207 kfree((void *)softback_buf);
3208 softback_buf = 0UL;
3209
3210 for (i = 0; i < FB_MAX; i++) {
3211 mapped = 0;
3212 info = registered_fb[i];
3213
3214 if (info == NULL)
3215 continue;
3216
3217 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3218 if (con2fb_map[j] == i)
3219 mapped = 1;
3220 }
3221
3222 if (mapped) {
3223 if (info->fbops->fb_release)
3224 info->fbops->fb_release(info, 0);
3225 module_put(info->fbops->owner);
3226
3227 if (info->fbcon_par) {
3228 fbcon_del_cursor_timer(info);
3229 kfree(info->fbcon_par);
3230 info->fbcon_par = NULL;
3231 }
3232
3233 if (info->queue.func == fb_flashcursor)
3234 info->queue.func = NULL;
3235 }
3236 }
3237
3238 fbcon_has_exited = 1;
3239 }
3240
3241 static int __init fb_console_init(void)
3242 {
3243 int i;
3244
3245 acquire_console_sem();
3246 fb_register_client(&fbcon_event_notifier);
3247 fbcon_class_device =
3248 class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3249
3250 if (IS_ERR(fbcon_class_device)) {
3251 printk(KERN_WARNING "Unable to create class_device "
3252 "for fbcon; errno = %ld\n",
3253 PTR_ERR(fbcon_class_device));
3254 fbcon_class_device = NULL;
3255 } else
3256 fbcon_init_class_device();
3257
3258 for (i = 0; i < MAX_NR_CONSOLES; i++)
3259 con2fb_map[i] = -1;
3260
3261 release_console_sem();
3262 fbcon_start();
3263 return 0;
3264 }
3265
3266 module_init(fb_console_init);
3267
3268 #ifdef MODULE
3269
3270 static void __exit fbcon_deinit_class_device(void)
3271 {
3272 int i;
3273
3274 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3275 class_device_remove_file(fbcon_class_device,
3276 &class_device_attrs[i]);
3277 }
3278
3279 static void __exit fb_console_exit(void)
3280 {
3281 acquire_console_sem();
3282 fb_unregister_client(&fbcon_event_notifier);
3283 fbcon_deinit_class_device();
3284 class_device_destroy(fb_class, MKDEV(0, 0));
3285 fbcon_exit();
3286 release_console_sem();
3287 unregister_con_driver(&fb_con);
3288 }
3289
3290 module_exit(fb_console_exit);
3291
3292 #endif
3293
3294 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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