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[POWERPC] Use menuconfig objects II - Macintosh
[wrt350n-kernel.git] / drivers / video / console / fbcon.c
blob0429fd2cece09cff24a3e3f849a9894bac3056cb
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/fs.h>
64 #include <linux/kernel.h>
65 #include <linux/delay.h> /* MSch: for IRQ probe */
66 #include <linux/console.h>
67 #include <linux/string.h>
68 #include <linux/kd.h>
69 #include <linux/slab.h>
70 #include <linux/fb.h>
71 #include <linux/vt_kern.h>
72 #include <linux/selection.h>
73 #include <linux/font.h>
74 #include <linux/smp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/crc32.h> /* For counting font checksums */
78 #include <asm/irq.h>
79 #include <asm/system.h>
80 #include <asm/uaccess.h>
81 #ifdef CONFIG_ATARI
82 #include <asm/atariints.h>
83 #endif
84 #ifdef CONFIG_MAC
85 #include <asm/macints.h>
86 #endif
87 #if defined(__mc68000__) || defined(CONFIG_APUS)
88 #include <asm/machdep.h>
89 #include <asm/setup.h>
90 #endif
91
92 #include "fbcon.h"
93
94 #ifdef FBCONDEBUG
95 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
96 #else
97 # define DPRINTK(fmt, args...)
98 #endif
99
100 enum {
101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
104 };
105
106 static struct display fb_display[MAX_NR_CONSOLES];
107
108 static signed char con2fb_map[MAX_NR_CONSOLES];
109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
110 static int logo_height;
111 static int logo_lines;
112 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
113 enums. */
114 static int logo_shown = FBCON_LOGO_CANSHOW;
115 /* Software scrollback */
116 static int fbcon_softback_size = 32768;
117 static unsigned long softback_buf, softback_curr;
118 static unsigned long softback_in;
119 static unsigned long softback_top, softback_end;
120 static int softback_lines;
121 /* console mappings */
122 static int first_fb_vc;
123 static int last_fb_vc = MAX_NR_CONSOLES - 1;
124 static int fbcon_is_default = 1;
125 static int fbcon_has_exited;
126
127 /* font data */
128 static char fontname[40];
129
130 /* current fb_info */
131 static int info_idx = -1;
132
133 /* console rotation */
134 static int rotate;
135 static int fbcon_has_sysfs;
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)
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(struct work_struct *work)
386 {
387 struct fb_info *info = container_of(work, struct fb_info, queue);
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 registered_fb[con2fb_map[vc->vc_num]] != info ||
400 vc->vc_deccm != 1) {
401 release_console_sem();
402 return;
403 }
404
405 p = &fb_display[vc->vc_num];
406 c = scr_readw((u16 *) vc->vc_pos);
407 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
408 CM_ERASE : CM_DRAW;
409 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
410 get_color(vc, info, c, 0));
411 release_console_sem();
412 }
413
414 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
415 static int cursor_blink_rate;
416 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
417 {
418 struct fb_info *info = dev_id;
419
420 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
421 schedule_work(&info->queue);
422 vbl_cursor_cnt = cursor_blink_rate;
423 }
424 return IRQ_HANDLED;
425 }
426 #endif
427
428 static void cursor_timer_handler(unsigned long dev_addr)
429 {
430 struct fb_info *info = (struct fb_info *) dev_addr;
431 struct fbcon_ops *ops = info->fbcon_par;
432
433 schedule_work(&info->queue);
434 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
435 }
436
437 static void fbcon_add_cursor_timer(struct fb_info *info)
438 {
439 struct fbcon_ops *ops = info->fbcon_par;
440
441 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
442 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
443 if (!info->queue.func)
444 INIT_WORK(&info->queue, fb_flashcursor);
445
446 init_timer(&ops->cursor_timer);
447 ops->cursor_timer.function = cursor_timer_handler;
448 ops->cursor_timer.expires = jiffies + HZ / 5;
449 ops->cursor_timer.data = (unsigned long ) info;
450 add_timer(&ops->cursor_timer);
451 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
452 }
453 }
454
455 static void fbcon_del_cursor_timer(struct fb_info *info)
456 {
457 struct fbcon_ops *ops = info->fbcon_par;
458
459 if (info->queue.func == fb_flashcursor &&
460 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
461 del_timer_sync(&ops->cursor_timer);
462 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
463 }
464 }
465
466 #ifndef MODULE
467 static int __init fb_console_setup(char *this_opt)
468 {
469 char *options;
470 int i, j;
471
472 if (!this_opt || !*this_opt)
473 return 1;
474
475 while ((options = strsep(&this_opt, ",")) != NULL) {
476 if (!strncmp(options, "font:", 5))
477 strcpy(fontname, options + 5);
478
479 if (!strncmp(options, "scrollback:", 11)) {
480 options += 11;
481 if (*options) {
482 fbcon_softback_size = simple_strtoul(options, &options, 0);
483 if (*options == 'k' || *options == 'K') {
484 fbcon_softback_size *= 1024;
485 options++;
486 }
487 if (*options != ',')
488 return 1;
489 options++;
490 } else
491 return 1;
492 }
493
494 if (!strncmp(options, "map:", 4)) {
495 options += 4;
496 if (*options)
497 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
498 if (!options[j])
499 j = 0;
500 con2fb_map_boot[i] =
501 (options[j++]-'0') % FB_MAX;
502 }
503 return 1;
504 }
505
506 if (!strncmp(options, "vc:", 3)) {
507 options += 3;
508 if (*options)
509 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
510 if (first_fb_vc < 0)
511 first_fb_vc = 0;
512 if (*options++ == '-')
513 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
514 fbcon_is_default = 0;
515 }
516
517 if (!strncmp(options, "rotate:", 7)) {
518 options += 7;
519 if (*options)
520 rotate = simple_strtoul(options, &options, 0);
521 if (rotate > 3)
522 rotate = 0;
523 }
524 }
525 return 1;
526 }
527
528 __setup("fbcon=", fb_console_setup);
529 #endif
530
531 static int search_fb_in_map(int idx)
532 {
533 int i, retval = 0;
534
535 for (i = first_fb_vc; i <= last_fb_vc; i++) {
536 if (con2fb_map[i] == idx)
537 retval = 1;
538 }
539 return retval;
540 }
541
542 static int search_for_mapped_con(void)
543 {
544 int i, retval = 0;
545
546 for (i = first_fb_vc; i <= last_fb_vc; i++) {
547 if (con2fb_map[i] != -1)
548 retval = 1;
549 }
550 return retval;
551 }
552
553 static int fbcon_takeover(int show_logo)
554 {
555 int err, i;
556
557 if (!num_registered_fb)
558 return -ENODEV;
559
560 if (!show_logo)
561 logo_shown = FBCON_LOGO_DONTSHOW;
562
563 for (i = first_fb_vc; i <= last_fb_vc; i++)
564 con2fb_map[i] = info_idx;
565
566 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
567 fbcon_is_default);
568
569 if (err) {
570 for (i = first_fb_vc; i <= last_fb_vc; i++) {
571 con2fb_map[i] = -1;
572 }
573 info_idx = -1;
574 }
575
576 return err;
577 }
578
579 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
580 int cols, int rows, int new_cols, int new_rows)
581 {
582 /* Need to make room for the logo */
583 struct fbcon_ops *ops = info->fbcon_par;
584 int cnt, erase = vc->vc_video_erase_char, step;
585 unsigned short *save = NULL, *r, *q;
586
587 /*
588 * remove underline attribute from erase character
589 * if black and white framebuffer.
590 */
591 if (fb_get_color_depth(&info->var, &info->fix) == 1)
592 erase &= ~0x400;
593 logo_height = fb_prepare_logo(info, ops->rotate);
594 logo_lines = (logo_height + vc->vc_font.height - 1) /
595 vc->vc_font.height;
596 q = (unsigned short *) (vc->vc_origin +
597 vc->vc_size_row * rows);
598 step = logo_lines * cols;
599 for (r = q - logo_lines * cols; r < q; r++)
600 if (scr_readw(r) != vc->vc_video_erase_char)
601 break;
602 if (r != q && new_rows >= rows + logo_lines) {
603 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
604 if (save) {
605 int i = cols < new_cols ? cols : new_cols;
606 scr_memsetw(save, erase, logo_lines * new_cols * 2);
607 r = q - step;
608 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
609 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
610 r = q;
611 }
612 }
613 if (r == q) {
614 /* We can scroll screen down */
615 r = q - step - cols;
616 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
617 scr_memcpyw(r + step, r, vc->vc_size_row);
618 r -= cols;
619 }
620 if (!save) {
621 vc->vc_y += logo_lines;
622 vc->vc_pos += logo_lines * vc->vc_size_row;
623 }
624 }
625 scr_memsetw((unsigned short *) vc->vc_origin,
626 erase,
627 vc->vc_size_row * logo_lines);
628
629 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
630 fbcon_clear_margins(vc, 0);
631 update_screen(vc);
632 }
633
634 if (save) {
635 q = (unsigned short *) (vc->vc_origin +
636 vc->vc_size_row *
637 rows);
638 scr_memcpyw(q, save, logo_lines * new_cols * 2);
639 vc->vc_y += logo_lines;
640 vc->vc_pos += logo_lines * vc->vc_size_row;
641 kfree(save);
642 }
643
644 if (logo_lines > vc->vc_bottom) {
645 logo_shown = FBCON_LOGO_CANSHOW;
646 printk(KERN_INFO
647 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
648 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
649 logo_shown = FBCON_LOGO_DRAW;
650 vc->vc_top = logo_lines;
651 }
652 }
653
654 #ifdef CONFIG_FB_TILEBLITTING
655 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
656 {
657 struct fbcon_ops *ops = info->fbcon_par;
658
659 ops->p = &fb_display[vc->vc_num];
660
661 if ((info->flags & FBINFO_MISC_TILEBLITTING))
662 fbcon_set_tileops(vc, info);
663 else {
664 fbcon_set_rotation(info);
665 fbcon_set_bitops(ops);
666 }
667 }
668 #else
669 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
670 {
671 struct fbcon_ops *ops = info->fbcon_par;
672
673 info->flags &= ~FBINFO_MISC_TILEBLITTING;
674 ops->p = &fb_display[vc->vc_num];
675 fbcon_set_rotation(info);
676 fbcon_set_bitops(ops);
677 }
678 #endif /* CONFIG_MISC_TILEBLITTING */
679
680
681 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
682 int unit, int oldidx)
683 {
684 struct fbcon_ops *ops = NULL;
685 int err = 0;
686
687 if (!try_module_get(info->fbops->owner))
688 err = -ENODEV;
689
690 if (!err && info->fbops->fb_open &&
691 info->fbops->fb_open(info, 0))
692 err = -ENODEV;
693
694 if (!err) {
695 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
696 if (!ops)
697 err = -ENOMEM;
698 }
699
700 if (!err) {
701 info->fbcon_par = ops;
702 set_blitting_type(vc, info);
703 }
704
705 if (err) {
706 con2fb_map[unit] = oldidx;
707 module_put(info->fbops->owner);
708 }
709
710 return err;
711 }
712
713 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
714 struct fb_info *newinfo, int unit,
715 int oldidx, int found)
716 {
717 struct fbcon_ops *ops = oldinfo->fbcon_par;
718 int err = 0;
719
720 if (oldinfo->fbops->fb_release &&
721 oldinfo->fbops->fb_release(oldinfo, 0)) {
722 con2fb_map[unit] = oldidx;
723 if (!found && newinfo->fbops->fb_release)
724 newinfo->fbops->fb_release(newinfo, 0);
725 if (!found)
726 module_put(newinfo->fbops->owner);
727 err = -ENODEV;
728 }
729
730 if (!err) {
731 fbcon_del_cursor_timer(oldinfo);
732 kfree(ops->cursor_state.mask);
733 kfree(ops->cursor_data);
734 kfree(ops->fontbuffer);
735 kfree(oldinfo->fbcon_par);
736 oldinfo->fbcon_par = NULL;
737 module_put(oldinfo->fbops->owner);
738 /*
739 If oldinfo and newinfo are driving the same hardware,
740 the fb_release() method of oldinfo may attempt to
741 restore the hardware state. This will leave the
742 newinfo in an undefined state. Thus, a call to
743 fb_set_par() may be needed for the newinfo.
744 */
745 if (newinfo->fbops->fb_set_par)
746 newinfo->fbops->fb_set_par(newinfo);
747 }
748
749 return err;
750 }
751
752 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
753 int unit, int show_logo)
754 {
755 struct fbcon_ops *ops = info->fbcon_par;
756
757 ops->currcon = fg_console;
758
759 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
760 info->fbops->fb_set_par(info);
761
762 ops->flags |= FBCON_FLAGS_INIT;
763 ops->graphics = 0;
764
765 if (vc)
766 fbcon_set_disp(info, &info->var, vc);
767 else
768 fbcon_preset_disp(info, &info->var, unit);
769
770 if (show_logo) {
771 struct vc_data *fg_vc = vc_cons[fg_console].d;
772 struct fb_info *fg_info =
773 registered_fb[con2fb_map[fg_console]];
774
775 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
776 fg_vc->vc_rows, fg_vc->vc_cols,
777 fg_vc->vc_rows);
778 }
779
780 update_screen(vc_cons[fg_console].d);
781 }
782
783 /**
784 * set_con2fb_map - map console to frame buffer device
785 * @unit: virtual console number to map
786 * @newidx: frame buffer index to map virtual console to
787 * @user: user request
788 *
789 * Maps a virtual console @unit to a frame buffer device
790 * @newidx.
791 */
792 static int set_con2fb_map(int unit, int newidx, int user)
793 {
794 struct vc_data *vc = vc_cons[unit].d;
795 int oldidx = con2fb_map[unit];
796 struct fb_info *info = registered_fb[newidx];
797 struct fb_info *oldinfo = NULL;
798 int found, err = 0;
799
800 if (oldidx == newidx)
801 return 0;
802
803 if (!info || fbcon_has_exited)
804 return -EINVAL;
805
806 if (!err && !search_for_mapped_con()) {
807 info_idx = newidx;
808 return fbcon_takeover(0);
809 }
810
811 if (oldidx != -1)
812 oldinfo = registered_fb[oldidx];
813
814 found = search_fb_in_map(newidx);
815
816 acquire_console_sem();
817 con2fb_map[unit] = newidx;
818 if (!err && !found)
819 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
820
821
822 /*
823 * If old fb is not mapped to any of the consoles,
824 * fbcon should release it.
825 */
826 if (!err && oldinfo && !search_fb_in_map(oldidx))
827 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
828 found);
829
830 if (!err) {
831 int show_logo = (fg_console == 0 && !user &&
832 logo_shown != FBCON_LOGO_DONTSHOW);
833
834 if (!found)
835 fbcon_add_cursor_timer(info);
836 con2fb_map_boot[unit] = newidx;
837 con2fb_init_display(vc, info, unit, show_logo);
838 }
839
840 if (!search_fb_in_map(info_idx))
841 info_idx = newidx;
842
843 release_console_sem();
844 return err;
845 }
846
847 /*
848 * Low Level Operations
849 */
850 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
851 static int var_to_display(struct display *disp,
852 struct fb_var_screeninfo *var,
853 struct fb_info *info)
854 {
855 disp->xres_virtual = var->xres_virtual;
856 disp->yres_virtual = var->yres_virtual;
857 disp->bits_per_pixel = var->bits_per_pixel;
858 disp->grayscale = var->grayscale;
859 disp->nonstd = var->nonstd;
860 disp->accel_flags = var->accel_flags;
861 disp->height = var->height;
862 disp->width = var->width;
863 disp->red = var->red;
864 disp->green = var->green;
865 disp->blue = var->blue;
866 disp->transp = var->transp;
867 disp->rotate = var->rotate;
868 disp->mode = fb_match_mode(var, &info->modelist);
869 if (disp->mode == NULL)
870 /* This should not happen */
871 return -EINVAL;
872 return 0;
873 }
874
875 static void display_to_var(struct fb_var_screeninfo *var,
876 struct display *disp)
877 {
878 fb_videomode_to_var(var, disp->mode);
879 var->xres_virtual = disp->xres_virtual;
880 var->yres_virtual = disp->yres_virtual;
881 var->bits_per_pixel = disp->bits_per_pixel;
882 var->grayscale = disp->grayscale;
883 var->nonstd = disp->nonstd;
884 var->accel_flags = disp->accel_flags;
885 var->height = disp->height;
886 var->width = disp->width;
887 var->red = disp->red;
888 var->green = disp->green;
889 var->blue = disp->blue;
890 var->transp = disp->transp;
891 var->rotate = disp->rotate;
892 }
893
894 static const char *fbcon_startup(void)
895 {
896 const char *display_desc = "frame buffer device";
897 struct display *p = &fb_display[fg_console];
898 struct vc_data *vc = vc_cons[fg_console].d;
899 const struct font_desc *font = NULL;
900 struct module *owner;
901 struct fb_info *info = NULL;
902 struct fbcon_ops *ops;
903 int rows, cols;
904 int irqres;
905
906 irqres = 1;
907 /*
908 * If num_registered_fb is zero, this is a call for the dummy part.
909 * The frame buffer devices weren't initialized yet.
910 */
911 if (!num_registered_fb || info_idx == -1)
912 return display_desc;
913 /*
914 * Instead of blindly using registered_fb[0], we use info_idx, set by
915 * fb_console_init();
916 */
917 info = registered_fb[info_idx];
918 if (!info)
919 return NULL;
920
921 owner = info->fbops->owner;
922 if (!try_module_get(owner))
923 return NULL;
924 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
925 module_put(owner);
926 return NULL;
927 }
928
929 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
930 if (!ops) {
931 module_put(owner);
932 return NULL;
933 }
934
935 ops->currcon = -1;
936 ops->graphics = 1;
937 ops->cur_rotate = -1;
938 info->fbcon_par = ops;
939 p->con_rotate = rotate;
940 set_blitting_type(vc, info);
941
942 if (info->fix.type != FB_TYPE_TEXT) {
943 if (fbcon_softback_size) {
944 if (!softback_buf) {
945 softback_buf =
946 (unsigned long)
947 kmalloc(fbcon_softback_size,
948 GFP_KERNEL);
949 if (!softback_buf) {
950 fbcon_softback_size = 0;
951 softback_top = 0;
952 }
953 }
954 } else {
955 if (softback_buf) {
956 kfree((void *) softback_buf);
957 softback_buf = 0;
958 softback_top = 0;
959 }
960 }
961 if (softback_buf)
962 softback_in = softback_top = softback_curr =
963 softback_buf;
964 softback_lines = 0;
965 }
966
967 /* Setup default font */
968 if (!p->fontdata) {
969 if (!fontname[0] || !(font = find_font(fontname)))
970 font = get_default_font(info->var.xres,
971 info->var.yres);
972 vc->vc_font.width = font->width;
973 vc->vc_font.height = font->height;
974 vc->vc_font.data = (void *)(p->fontdata = font->data);
975 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
976 }
977
978 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
979 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
980 cols /= vc->vc_font.width;
981 rows /= vc->vc_font.height;
982 vc_resize(vc, cols, rows);
983
984 DPRINTK("mode: %s\n", info->fix.id);
985 DPRINTK("visual: %d\n", info->fix.visual);
986 DPRINTK("res: %dx%d-%d\n", info->var.xres,
987 info->var.yres,
988 info->var.bits_per_pixel);
989
990 #ifdef CONFIG_ATARI
991 if (MACH_IS_ATARI) {
992 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
993 irqres =
994 request_irq(IRQ_AUTO_4, fb_vbl_handler,
995 IRQ_TYPE_PRIO, "framebuffer vbl",
996 info);
997 }
998 #endif /* CONFIG_ATARI */
999
1000 #ifdef CONFIG_MAC
1001 /*
1002 * On a Macintoy, the VBL interrupt may or may not be active.
1003 * As interrupt based cursor is more reliable and race free, we
1004 * probe for VBL interrupts.
1005 */
1006 if (MACH_IS_MAC) {
1007 int ct = 0;
1008 /*
1009 * Probe for VBL: set temp. handler ...
1010 */
1011 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1012 "framebuffer vbl", info);
1013 vbl_detected = 0;
1014
1015 /*
1016 * ... and spin for 20 ms ...
1017 */
1018 while (!vbl_detected && ++ct < 1000)
1019 udelay(20);
1020
1021 if (ct == 1000)
1022 printk
1023 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1024
1025 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1026
1027 if (vbl_detected) {
1028 /*
1029 * interrupt based cursor ok
1030 */
1031 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1032 irqres =
1033 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1034 "framebuffer vbl", info);
1035 } else {
1036 /*
1037 * VBL not detected: fall through, use timer based cursor
1038 */
1039 irqres = 1;
1040 }
1041 }
1042 #endif /* CONFIG_MAC */
1043
1044 fbcon_add_cursor_timer(info);
1045 fbcon_has_exited = 0;
1046 return display_desc;
1047 }
1048
1049 static void fbcon_init(struct vc_data *vc, int init)
1050 {
1051 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1052 struct fbcon_ops *ops;
1053 struct vc_data **default_mode = vc->vc_display_fg;
1054 struct vc_data *svc = *default_mode;
1055 struct display *t, *p = &fb_display[vc->vc_num];
1056 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1057 int cap;
1058
1059 if (info_idx == -1 || info == NULL)
1060 return;
1061
1062 cap = info->flags;
1063
1064 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1065 (info->fix.type == FB_TYPE_TEXT))
1066 logo = 0;
1067
1068 if (var_to_display(p, &info->var, info))
1069 return;
1070
1071 /* If we are not the first console on this
1072 fb, copy the font from that console */
1073 t = &fb_display[fg_console];
1074 if (!p->fontdata) {
1075 if (t->fontdata) {
1076 struct vc_data *fvc = vc_cons[fg_console].d;
1077
1078 vc->vc_font.data = (void *)(p->fontdata =
1079 fvc->vc_font.data);
1080 vc->vc_font.width = fvc->vc_font.width;
1081 vc->vc_font.height = fvc->vc_font.height;
1082 p->userfont = t->userfont;
1083
1084 if (p->userfont)
1085 REFCOUNT(p->fontdata)++;
1086 } else {
1087 const struct font_desc *font = NULL;
1088
1089 if (!fontname[0] || !(font = find_font(fontname)))
1090 font = get_default_font(info->var.xres,
1091 info->var.yres);
1092 vc->vc_font.width = font->width;
1093 vc->vc_font.height = font->height;
1094 vc->vc_font.data = (void *)(p->fontdata = font->data);
1095 vc->vc_font.charcount = 256; /* FIXME Need to
1096 support more fonts */
1097 }
1098 }
1099
1100 if (p->userfont)
1101 charcnt = FNTCHARCNT(p->fontdata);
1102
1103 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1104 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1105 if (charcnt == 256) {
1106 vc->vc_hi_font_mask = 0;
1107 } else {
1108 vc->vc_hi_font_mask = 0x100;
1109 if (vc->vc_can_do_color)
1110 vc->vc_complement_mask <<= 1;
1111 }
1112
1113 if (!*svc->vc_uni_pagedir_loc)
1114 con_set_default_unimap(svc);
1115 if (!*vc->vc_uni_pagedir_loc)
1116 con_copy_unimap(vc, svc);
1117
1118 ops = info->fbcon_par;
1119 p->con_rotate = rotate;
1120 set_blitting_type(vc, info);
1121
1122 cols = vc->vc_cols;
1123 rows = vc->vc_rows;
1124 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1125 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1126 new_cols /= vc->vc_font.width;
1127 new_rows /= vc->vc_font.height;
1128 vc_resize(vc, new_cols, new_rows);
1129
1130 /*
1131 * We must always set the mode. The mode of the previous console
1132 * driver could be in the same resolution but we are using different
1133 * hardware so we have to initialize the hardware.
1134 *
1135 * We need to do it in fbcon_init() to prevent screen corruption.
1136 */
1137 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1138 if (info->fbops->fb_set_par &&
1139 !(ops->flags & FBCON_FLAGS_INIT))
1140 info->fbops->fb_set_par(info);
1141 ops->flags |= FBCON_FLAGS_INIT;
1142 }
1143
1144 ops->graphics = 0;
1145
1146 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1147 !(cap & FBINFO_HWACCEL_DISABLED))
1148 p->scrollmode = SCROLL_MOVE;
1149 else /* default to something safe */
1150 p->scrollmode = SCROLL_REDRAW;
1151
1152 /*
1153 * ++guenther: console.c:vc_allocate() relies on initializing
1154 * vc_{cols,rows}, but we must not set those if we are only
1155 * resizing the console.
1156 */
1157 if (!init) {
1158 vc->vc_cols = new_cols;
1159 vc->vc_rows = new_rows;
1160 }
1161
1162 if (logo)
1163 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1164
1165 if (vc == svc && softback_buf)
1166 fbcon_update_softback(vc);
1167
1168 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1169 ops->rotate = FB_ROTATE_UR;
1170 set_blitting_type(vc, info);
1171 }
1172
1173 ops->p = &fb_display[fg_console];
1174 }
1175
1176 static void fbcon_free_font(struct display *p)
1177 {
1178 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1179 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1180 p->fontdata = NULL;
1181 p->userfont = 0;
1182 }
1183
1184 static void fbcon_deinit(struct vc_data *vc)
1185 {
1186 struct display *p = &fb_display[vc->vc_num];
1187 struct fb_info *info;
1188 struct fbcon_ops *ops;
1189 int idx;
1190
1191 fbcon_free_font(p);
1192 idx = con2fb_map[vc->vc_num];
1193
1194 if (idx == -1)
1195 goto finished;
1196
1197 info = registered_fb[idx];
1198
1199 if (!info)
1200 goto finished;
1201
1202 ops = info->fbcon_par;
1203
1204 if (!ops)
1205 goto finished;
1206
1207 if (CON_IS_VISIBLE(vc))
1208 fbcon_del_cursor_timer(info);
1209
1210 ops->flags &= ~FBCON_FLAGS_INIT;
1211 finished:
1212
1213 if (!con_is_bound(&fb_con))
1214 fbcon_exit();
1215
1216 return;
1217 }
1218
1219 /* ====================================================================== */
1220
1221 /* fbcon_XXX routines - interface used by the world
1222 *
1223 * This system is now divided into two levels because of complications
1224 * caused by hardware scrolling. Top level functions:
1225 *
1226 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1227 *
1228 * handles y values in range [0, scr_height-1] that correspond to real
1229 * screen positions. y_wrap shift means that first line of bitmap may be
1230 * anywhere on this display. These functions convert lineoffsets to
1231 * bitmap offsets and deal with the wrap-around case by splitting blits.
1232 *
1233 * fbcon_bmove_physical_8() -- These functions fast implementations
1234 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1235 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1236 *
1237 * WARNING:
1238 *
1239 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1240 * Implies should only really hardware scroll in rows. Only reason for
1241 * restriction is simplicity & efficiency at the moment.
1242 */
1243
1244 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1245 int width)
1246 {
1247 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1248 struct fbcon_ops *ops = info->fbcon_par;
1249
1250 struct display *p = &fb_display[vc->vc_num];
1251 u_int y_break;
1252
1253 if (fbcon_is_inactive(vc, info))
1254 return;
1255
1256 if (!height || !width)
1257 return;
1258
1259 /* Split blits that cross physical y_wrap boundary */
1260
1261 y_break = p->vrows - p->yscroll;
1262 if (sy < y_break && sy + height - 1 >= y_break) {
1263 u_int b = y_break - sy;
1264 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1265 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1266 width);
1267 } else
1268 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1269 }
1270
1271 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1272 int count, int ypos, int xpos)
1273 {
1274 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1275 struct display *p = &fb_display[vc->vc_num];
1276 struct fbcon_ops *ops = info->fbcon_par;
1277
1278 if (!fbcon_is_inactive(vc, info))
1279 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1280 get_color(vc, info, scr_readw(s), 1),
1281 get_color(vc, info, scr_readw(s), 0));
1282 }
1283
1284 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1285 {
1286 unsigned short chr;
1287
1288 scr_writew(c, &chr);
1289 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1290 }
1291
1292 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1293 {
1294 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1295 struct fbcon_ops *ops = info->fbcon_par;
1296
1297 if (!fbcon_is_inactive(vc, info))
1298 ops->clear_margins(vc, info, bottom_only);
1299 }
1300
1301 static void fbcon_cursor(struct vc_data *vc, int mode)
1302 {
1303 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1304 struct fbcon_ops *ops = info->fbcon_par;
1305 int y;
1306 int c = scr_readw((u16 *) vc->vc_pos);
1307
1308 if (fbcon_is_inactive(vc, info))
1309 return;
1310
1311 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1312 if (mode & CM_SOFTBACK) {
1313 mode &= ~CM_SOFTBACK;
1314 y = softback_lines;
1315 } else {
1316 if (softback_lines)
1317 fbcon_set_origin(vc);
1318 y = 0;
1319 }
1320
1321 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1322 get_color(vc, info, c, 0));
1323 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1324 }
1325
1326 static int scrollback_phys_max = 0;
1327 static int scrollback_max = 0;
1328 static int scrollback_current = 0;
1329
1330 /*
1331 * If no vc is existent yet, just set struct display
1332 */
1333 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1334 int unit)
1335 {
1336 struct display *p = &fb_display[unit];
1337 struct display *t = &fb_display[fg_console];
1338
1339 if (var_to_display(p, var, info))
1340 return;
1341
1342 p->fontdata = t->fontdata;
1343 p->userfont = t->userfont;
1344 if (p->userfont)
1345 REFCOUNT(p->fontdata)++;
1346 }
1347
1348 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1349 struct vc_data *vc)
1350 {
1351 struct display *p = &fb_display[vc->vc_num], *t;
1352 struct vc_data **default_mode = vc->vc_display_fg;
1353 struct vc_data *svc = *default_mode;
1354 struct fbcon_ops *ops = info->fbcon_par;
1355 int rows, cols, charcnt = 256;
1356
1357 if (var_to_display(p, var, info))
1358 return;
1359 t = &fb_display[svc->vc_num];
1360 if (!vc->vc_font.data) {
1361 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1362 vc->vc_font.width = (*default_mode)->vc_font.width;
1363 vc->vc_font.height = (*default_mode)->vc_font.height;
1364 p->userfont = t->userfont;
1365 if (p->userfont)
1366 REFCOUNT(p->fontdata)++;
1367 }
1368 if (p->userfont)
1369 charcnt = FNTCHARCNT(p->fontdata);
1370
1371 var->activate = FB_ACTIVATE_NOW;
1372 info->var.activate = var->activate;
1373 var->yoffset = info->var.yoffset;
1374 var->xoffset = info->var.xoffset;
1375 fb_set_var(info, var);
1376 ops->var = info->var;
1377 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1378 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1379 if (charcnt == 256) {
1380 vc->vc_hi_font_mask = 0;
1381 } else {
1382 vc->vc_hi_font_mask = 0x100;
1383 if (vc->vc_can_do_color)
1384 vc->vc_complement_mask <<= 1;
1385 }
1386
1387 if (!*svc->vc_uni_pagedir_loc)
1388 con_set_default_unimap(svc);
1389 if (!*vc->vc_uni_pagedir_loc)
1390 con_copy_unimap(vc, svc);
1391
1392 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1393 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1394 cols /= vc->vc_font.width;
1395 rows /= vc->vc_font.height;
1396 vc_resize(vc, cols, rows);
1397
1398 if (CON_IS_VISIBLE(vc)) {
1399 update_screen(vc);
1400 if (softback_buf)
1401 fbcon_update_softback(vc);
1402 }
1403 }
1404
1405 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1406 {
1407 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1408 struct fbcon_ops *ops = info->fbcon_par;
1409 struct display *p = &fb_display[vc->vc_num];
1410
1411 p->yscroll += count;
1412 if (p->yscroll >= p->vrows) /* Deal with wrap */
1413 p->yscroll -= p->vrows;
1414 ops->var.xoffset = 0;
1415 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1416 ops->var.vmode |= FB_VMODE_YWRAP;
1417 ops->update_start(info);
1418 scrollback_max += count;
1419 if (scrollback_max > scrollback_phys_max)
1420 scrollback_max = scrollback_phys_max;
1421 scrollback_current = 0;
1422 }
1423
1424 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1425 {
1426 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1427 struct fbcon_ops *ops = info->fbcon_par;
1428 struct display *p = &fb_display[vc->vc_num];
1429
1430 p->yscroll -= count;
1431 if (p->yscroll < 0) /* Deal with wrap */
1432 p->yscroll += p->vrows;
1433 ops->var.xoffset = 0;
1434 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1435 ops->var.vmode |= FB_VMODE_YWRAP;
1436 ops->update_start(info);
1437 scrollback_max -= count;
1438 if (scrollback_max < 0)
1439 scrollback_max = 0;
1440 scrollback_current = 0;
1441 }
1442
1443 static __inline__ void ypan_up(struct vc_data *vc, int count)
1444 {
1445 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1446 struct display *p = &fb_display[vc->vc_num];
1447 struct fbcon_ops *ops = info->fbcon_par;
1448
1449 p->yscroll += count;
1450 if (p->yscroll > p->vrows - vc->vc_rows) {
1451 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1452 0, 0, 0, vc->vc_rows, vc->vc_cols);
1453 p->yscroll -= p->vrows - vc->vc_rows;
1454 }
1455
1456 ops->var.xoffset = 0;
1457 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1458 ops->var.vmode &= ~FB_VMODE_YWRAP;
1459 ops->update_start(info);
1460 fbcon_clear_margins(vc, 1);
1461 scrollback_max += count;
1462 if (scrollback_max > scrollback_phys_max)
1463 scrollback_max = scrollback_phys_max;
1464 scrollback_current = 0;
1465 }
1466
1467 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1468 {
1469 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1470 struct fbcon_ops *ops = info->fbcon_par;
1471 struct display *p = &fb_display[vc->vc_num];
1472
1473 p->yscroll += count;
1474
1475 if (p->yscroll > p->vrows - vc->vc_rows) {
1476 p->yscroll -= p->vrows - vc->vc_rows;
1477 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1478 }
1479
1480 ops->var.xoffset = 0;
1481 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1482 ops->var.vmode &= ~FB_VMODE_YWRAP;
1483 ops->update_start(info);
1484 fbcon_clear_margins(vc, 1);
1485 scrollback_max += count;
1486 if (scrollback_max > scrollback_phys_max)
1487 scrollback_max = scrollback_phys_max;
1488 scrollback_current = 0;
1489 }
1490
1491 static __inline__ void ypan_down(struct vc_data *vc, int count)
1492 {
1493 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1494 struct display *p = &fb_display[vc->vc_num];
1495 struct fbcon_ops *ops = info->fbcon_par;
1496
1497 p->yscroll -= count;
1498 if (p->yscroll < 0) {
1499 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1500 0, vc->vc_rows, vc->vc_cols);
1501 p->yscroll += p->vrows - vc->vc_rows;
1502 }
1503
1504 ops->var.xoffset = 0;
1505 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1506 ops->var.vmode &= ~FB_VMODE_YWRAP;
1507 ops->update_start(info);
1508 fbcon_clear_margins(vc, 1);
1509 scrollback_max -= count;
1510 if (scrollback_max < 0)
1511 scrollback_max = 0;
1512 scrollback_current = 0;
1513 }
1514
1515 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1516 {
1517 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1518 struct fbcon_ops *ops = info->fbcon_par;
1519 struct display *p = &fb_display[vc->vc_num];
1520
1521 p->yscroll -= count;
1522
1523 if (p->yscroll < 0) {
1524 p->yscroll += p->vrows - vc->vc_rows;
1525 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1526 }
1527
1528 ops->var.xoffset = 0;
1529 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1530 ops->var.vmode &= ~FB_VMODE_YWRAP;
1531 ops->update_start(info);
1532 fbcon_clear_margins(vc, 1);
1533 scrollback_max -= count;
1534 if (scrollback_max < 0)
1535 scrollback_max = 0;
1536 scrollback_current = 0;
1537 }
1538
1539 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1540 long delta)
1541 {
1542 int count = vc->vc_rows;
1543 unsigned short *d, *s;
1544 unsigned long n;
1545 int line = 0;
1546
1547 d = (u16 *) softback_curr;
1548 if (d == (u16 *) softback_in)
1549 d = (u16 *) vc->vc_origin;
1550 n = softback_curr + delta * vc->vc_size_row;
1551 softback_lines -= delta;
1552 if (delta < 0) {
1553 if (softback_curr < softback_top && n < softback_buf) {
1554 n += softback_end - softback_buf;
1555 if (n < softback_top) {
1556 softback_lines -=
1557 (softback_top - n) / vc->vc_size_row;
1558 n = softback_top;
1559 }
1560 } else if (softback_curr >= softback_top
1561 && n < softback_top) {
1562 softback_lines -=
1563 (softback_top - n) / vc->vc_size_row;
1564 n = softback_top;
1565 }
1566 } else {
1567 if (softback_curr > softback_in && n >= softback_end) {
1568 n += softback_buf - softback_end;
1569 if (n > softback_in) {
1570 n = softback_in;
1571 softback_lines = 0;
1572 }
1573 } else if (softback_curr <= softback_in && n > softback_in) {
1574 n = softback_in;
1575 softback_lines = 0;
1576 }
1577 }
1578 if (n == softback_curr)
1579 return;
1580 softback_curr = n;
1581 s = (u16 *) softback_curr;
1582 if (s == (u16 *) softback_in)
1583 s = (u16 *) vc->vc_origin;
1584 while (count--) {
1585 unsigned short *start;
1586 unsigned short *le;
1587 unsigned short c;
1588 int x = 0;
1589 unsigned short attr = 1;
1590
1591 start = s;
1592 le = advance_row(s, 1);
1593 do {
1594 c = scr_readw(s);
1595 if (attr != (c & 0xff00)) {
1596 attr = c & 0xff00;
1597 if (s > start) {
1598 fbcon_putcs(vc, start, s - start,
1599 line, x);
1600 x += s - start;
1601 start = s;
1602 }
1603 }
1604 if (c == scr_readw(d)) {
1605 if (s > start) {
1606 fbcon_putcs(vc, start, s - start,
1607 line, x);
1608 x += s - start + 1;
1609 start = s + 1;
1610 } else {
1611 x++;
1612 start++;
1613 }
1614 }
1615 s++;
1616 d++;
1617 } while (s < le);
1618 if (s > start)
1619 fbcon_putcs(vc, start, s - start, line, x);
1620 line++;
1621 if (d == (u16 *) softback_end)
1622 d = (u16 *) softback_buf;
1623 if (d == (u16 *) softback_in)
1624 d = (u16 *) vc->vc_origin;
1625 if (s == (u16 *) softback_end)
1626 s = (u16 *) softback_buf;
1627 if (s == (u16 *) softback_in)
1628 s = (u16 *) vc->vc_origin;
1629 }
1630 }
1631
1632 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1633 int line, int count, int dy)
1634 {
1635 unsigned short *s = (unsigned short *)
1636 (vc->vc_origin + vc->vc_size_row * line);
1637
1638 while (count--) {
1639 unsigned short *start = s;
1640 unsigned short *le = advance_row(s, 1);
1641 unsigned short c;
1642 int x = 0;
1643 unsigned short attr = 1;
1644
1645 do {
1646 c = scr_readw(s);
1647 if (attr != (c & 0xff00)) {
1648 attr = c & 0xff00;
1649 if (s > start) {
1650 fbcon_putcs(vc, start, s - start,
1651 dy, x);
1652 x += s - start;
1653 start = s;
1654 }
1655 }
1656 console_conditional_schedule();
1657 s++;
1658 } while (s < le);
1659 if (s > start)
1660 fbcon_putcs(vc, start, s - start, dy, x);
1661 console_conditional_schedule();
1662 dy++;
1663 }
1664 }
1665
1666 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1667 int line, int count, int offset)
1668 {
1669 unsigned short *d = (unsigned short *)
1670 (vc->vc_origin + vc->vc_size_row * line);
1671 unsigned short *s = d + offset;
1672
1673 while (count--) {
1674 unsigned short *start = s;
1675 unsigned short *le = advance_row(s, 1);
1676 unsigned short c;
1677 int x = 0;
1678 unsigned short attr = 1;
1679
1680 do {
1681 c = scr_readw(s);
1682 if (attr != (c & 0xff00)) {
1683 attr = c & 0xff00;
1684 if (s > start) {
1685 fbcon_putcs(vc, start, s - start,
1686 line, x);
1687 x += s - start;
1688 start = s;
1689 }
1690 }
1691 if (c == scr_readw(d)) {
1692 if (s > start) {
1693 fbcon_putcs(vc, start, s - start,
1694 line, x);
1695 x += s - start + 1;
1696 start = s + 1;
1697 } else {
1698 x++;
1699 start++;
1700 }
1701 }
1702 scr_writew(c, d);
1703 console_conditional_schedule();
1704 s++;
1705 d++;
1706 } while (s < le);
1707 if (s > start)
1708 fbcon_putcs(vc, start, s - start, line, x);
1709 console_conditional_schedule();
1710 if (offset > 0)
1711 line++;
1712 else {
1713 line--;
1714 /* NOTE: We subtract two lines from these pointers */
1715 s -= vc->vc_size_row;
1716 d -= vc->vc_size_row;
1717 }
1718 }
1719 }
1720
1721 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1722 int count)
1723 {
1724 unsigned short *p;
1725
1726 if (vc->vc_num != fg_console)
1727 return;
1728 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1729
1730 while (count) {
1731 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1732 count--;
1733 p = advance_row(p, 1);
1734 softback_in += vc->vc_size_row;
1735 if (softback_in == softback_end)
1736 softback_in = softback_buf;
1737 if (softback_in == softback_top) {
1738 softback_top += vc->vc_size_row;
1739 if (softback_top == softback_end)
1740 softback_top = softback_buf;
1741 }
1742 }
1743 softback_curr = softback_in;
1744 }
1745
1746 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1747 int count)
1748 {
1749 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1750 struct display *p = &fb_display[vc->vc_num];
1751 struct fbcon_ops *ops = info->fbcon_par;
1752 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1753
1754 if (fbcon_is_inactive(vc, info))
1755 return -EINVAL;
1756
1757 fbcon_cursor(vc, CM_ERASE);
1758
1759 /*
1760 * ++Geert: Only use ywrap/ypan if the console is in text mode
1761 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1762 * whole screen (prevents flicker).
1763 */
1764
1765 switch (dir) {
1766 case SM_UP:
1767 if (count > vc->vc_rows) /* Maximum realistic size */
1768 count = vc->vc_rows;
1769 if (softback_top)
1770 fbcon_softback_note(vc, t, count);
1771 if (logo_shown >= 0)
1772 goto redraw_up;
1773 switch (p->scrollmode) {
1774 case SCROLL_MOVE:
1775 ops->bmove(vc, info, t + count, 0, t, 0,
1776 b - t - count, vc->vc_cols);
1777 ops->clear(vc, info, b - count, 0, count,
1778 vc->vc_cols);
1779 break;
1780
1781 case SCROLL_WRAP_MOVE:
1782 if (b - t - count > 3 * vc->vc_rows >> 2) {
1783 if (t > 0)
1784 fbcon_bmove(vc, 0, 0, count, 0, t,
1785 vc->vc_cols);
1786 ywrap_up(vc, count);
1787 if (vc->vc_rows - b > 0)
1788 fbcon_bmove(vc, b - count, 0, b, 0,
1789 vc->vc_rows - b,
1790 vc->vc_cols);
1791 } else if (info->flags & FBINFO_READS_FAST)
1792 fbcon_bmove(vc, t + count, 0, t, 0,
1793 b - t - count, vc->vc_cols);
1794 else
1795 goto redraw_up;
1796 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1797 break;
1798
1799 case SCROLL_PAN_REDRAW:
1800 if ((p->yscroll + count <=
1801 2 * (p->vrows - vc->vc_rows))
1802 && ((!scroll_partial && (b - t == vc->vc_rows))
1803 || (scroll_partial
1804 && (b - t - count >
1805 3 * vc->vc_rows >> 2)))) {
1806 if (t > 0)
1807 fbcon_redraw_move(vc, p, 0, t, count);
1808 ypan_up_redraw(vc, t, count);
1809 if (vc->vc_rows - b > 0)
1810 fbcon_redraw_move(vc, p, b,
1811 vc->vc_rows - b, b);
1812 } else
1813 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1814 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1815 break;
1816
1817 case SCROLL_PAN_MOVE:
1818 if ((p->yscroll + count <=
1819 2 * (p->vrows - vc->vc_rows))
1820 && ((!scroll_partial && (b - t == vc->vc_rows))
1821 || (scroll_partial
1822 && (b - t - count >
1823 3 * vc->vc_rows >> 2)))) {
1824 if (t > 0)
1825 fbcon_bmove(vc, 0, 0, count, 0, t,
1826 vc->vc_cols);
1827 ypan_up(vc, count);
1828 if (vc->vc_rows - b > 0)
1829 fbcon_bmove(vc, b - count, 0, b, 0,
1830 vc->vc_rows - b,
1831 vc->vc_cols);
1832 } else if (info->flags & FBINFO_READS_FAST)
1833 fbcon_bmove(vc, t + count, 0, t, 0,
1834 b - t - count, vc->vc_cols);
1835 else
1836 goto redraw_up;
1837 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1838 break;
1839
1840 case SCROLL_REDRAW:
1841 redraw_up:
1842 fbcon_redraw(vc, p, t, b - t - count,
1843 count * vc->vc_cols);
1844 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1845 scr_memsetw((unsigned short *) (vc->vc_origin +
1846 vc->vc_size_row *
1847 (b - count)),
1848 vc->vc_video_erase_char,
1849 vc->vc_size_row * count);
1850 return 1;
1851 }
1852 break;
1853
1854 case SM_DOWN:
1855 if (count > vc->vc_rows) /* Maximum realistic size */
1856 count = vc->vc_rows;
1857 if (logo_shown >= 0)
1858 goto redraw_down;
1859 switch (p->scrollmode) {
1860 case SCROLL_MOVE:
1861 ops->bmove(vc, info, t, 0, t + count, 0,
1862 b - t - count, vc->vc_cols);
1863 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1864 break;
1865
1866 case SCROLL_WRAP_MOVE:
1867 if (b - t - count > 3 * vc->vc_rows >> 2) {
1868 if (vc->vc_rows - b > 0)
1869 fbcon_bmove(vc, b, 0, b - count, 0,
1870 vc->vc_rows - b,
1871 vc->vc_cols);
1872 ywrap_down(vc, count);
1873 if (t > 0)
1874 fbcon_bmove(vc, count, 0, 0, 0, t,
1875 vc->vc_cols);
1876 } else if (info->flags & FBINFO_READS_FAST)
1877 fbcon_bmove(vc, t, 0, t + count, 0,
1878 b - t - count, vc->vc_cols);
1879 else
1880 goto redraw_down;
1881 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1882 break;
1883
1884 case SCROLL_PAN_MOVE:
1885 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1886 && ((!scroll_partial && (b - t == vc->vc_rows))
1887 || (scroll_partial
1888 && (b - t - count >
1889 3 * vc->vc_rows >> 2)))) {
1890 if (vc->vc_rows - b > 0)
1891 fbcon_bmove(vc, b, 0, b - count, 0,
1892 vc->vc_rows - b,
1893 vc->vc_cols);
1894 ypan_down(vc, count);
1895 if (t > 0)
1896 fbcon_bmove(vc, count, 0, 0, 0, t,
1897 vc->vc_cols);
1898 } else if (info->flags & FBINFO_READS_FAST)
1899 fbcon_bmove(vc, t, 0, t + count, 0,
1900 b - t - count, vc->vc_cols);
1901 else
1902 goto redraw_down;
1903 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1904 break;
1905
1906 case SCROLL_PAN_REDRAW:
1907 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1908 && ((!scroll_partial && (b - t == vc->vc_rows))
1909 || (scroll_partial
1910 && (b - t - count >
1911 3 * vc->vc_rows >> 2)))) {
1912 if (vc->vc_rows - b > 0)
1913 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1914 b - count);
1915 ypan_down_redraw(vc, t, count);
1916 if (t > 0)
1917 fbcon_redraw_move(vc, p, count, t, 0);
1918 } else
1919 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1920 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1921 break;
1922
1923 case SCROLL_REDRAW:
1924 redraw_down:
1925 fbcon_redraw(vc, p, b - 1, b - t - count,
1926 -count * vc->vc_cols);
1927 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1928 scr_memsetw((unsigned short *) (vc->vc_origin +
1929 vc->vc_size_row *
1930 t),
1931 vc->vc_video_erase_char,
1932 vc->vc_size_row * count);
1933 return 1;
1934 }
1935 }
1936 return 0;
1937 }
1938
1939
1940 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1941 int height, int width)
1942 {
1943 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1944 struct display *p = &fb_display[vc->vc_num];
1945
1946 if (fbcon_is_inactive(vc, info))
1947 return;
1948
1949 if (!width || !height)
1950 return;
1951
1952 /* Split blits that cross physical y_wrap case.
1953 * Pathological case involves 4 blits, better to use recursive
1954 * code rather than unrolled case
1955 *
1956 * Recursive invocations don't need to erase the cursor over and
1957 * over again, so we use fbcon_bmove_rec()
1958 */
1959 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1960 p->vrows - p->yscroll);
1961 }
1962
1963 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1964 int dy, int dx, int height, int width, u_int y_break)
1965 {
1966 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1967 struct fbcon_ops *ops = info->fbcon_par;
1968 u_int b;
1969
1970 if (sy < y_break && sy + height > y_break) {
1971 b = y_break - sy;
1972 if (dy < sy) { /* Avoid trashing self */
1973 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1974 y_break);
1975 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1976 height - b, width, y_break);
1977 } else {
1978 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1979 height - b, width, y_break);
1980 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1981 y_break);
1982 }
1983 return;
1984 }
1985
1986 if (dy < y_break && dy + height > y_break) {
1987 b = y_break - dy;
1988 if (dy < sy) { /* Avoid trashing self */
1989 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1990 y_break);
1991 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1992 height - b, width, y_break);
1993 } else {
1994 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1995 height - b, width, y_break);
1996 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1997 y_break);
1998 }
1999 return;
2000 }
2001 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2002 height, width);
2003 }
2004
2005 static __inline__ void updatescrollmode(struct display *p,
2006 struct fb_info *info,
2007 struct vc_data *vc)
2008 {
2009 struct fbcon_ops *ops = info->fbcon_par;
2010 int fh = vc->vc_font.height;
2011 int cap = info->flags;
2012 u16 t = 0;
2013 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2014 info->fix.xpanstep);
2015 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2016 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2017 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2018 info->var.xres_virtual);
2019 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2020 divides(ypan, vc->vc_font.height) && vyres > yres;
2021 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2022 divides(ywrap, vc->vc_font.height) &&
2023 divides(vc->vc_font.height, vyres) &&
2024 divides(vc->vc_font.height, yres);
2025 int reading_fast = cap & FBINFO_READS_FAST;
2026 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2027 !(cap & FBINFO_HWACCEL_DISABLED);
2028 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2029 !(cap & FBINFO_HWACCEL_DISABLED);
2030
2031 p->vrows = vyres/fh;
2032 if (yres > (fh * (vc->vc_rows + 1)))
2033 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2034 if ((yres % fh) && (vyres % fh < yres % fh))
2035 p->vrows--;
2036
2037 if (good_wrap || good_pan) {
2038 if (reading_fast || fast_copyarea)
2039 p->scrollmode = good_wrap ?
2040 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2041 else
2042 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2043 SCROLL_PAN_REDRAW;
2044 } else {
2045 if (reading_fast || (fast_copyarea && !fast_imageblit))
2046 p->scrollmode = SCROLL_MOVE;
2047 else
2048 p->scrollmode = SCROLL_REDRAW;
2049 }
2050 }
2051
2052 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2053 unsigned int height)
2054 {
2055 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2056 struct fbcon_ops *ops = info->fbcon_par;
2057 struct display *p = &fb_display[vc->vc_num];
2058 struct fb_var_screeninfo var = info->var;
2059 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2060
2061 virt_w = FBCON_SWAP(ops->rotate, width, height);
2062 virt_h = FBCON_SWAP(ops->rotate, height, width);
2063 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2064 vc->vc_font.height);
2065 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2066 vc->vc_font.width);
2067 var.xres = virt_w * virt_fw;
2068 var.yres = virt_h * virt_fh;
2069 x_diff = info->var.xres - var.xres;
2070 y_diff = info->var.yres - var.yres;
2071 if (x_diff < 0 || x_diff > virt_fw ||
2072 y_diff < 0 || y_diff > virt_fh) {
2073 const struct fb_videomode *mode;
2074
2075 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2076 mode = fb_find_best_mode(&var, &info->modelist);
2077 if (mode == NULL)
2078 return -EINVAL;
2079 display_to_var(&var, p);
2080 fb_videomode_to_var(&var, mode);
2081
2082 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2083 return -EINVAL;
2084
2085 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2086 if (CON_IS_VISIBLE(vc)) {
2087 var.activate = FB_ACTIVATE_NOW |
2088 FB_ACTIVATE_FORCE;
2089 fb_set_var(info, &var);
2090 }
2091 var_to_display(p, &info->var, info);
2092 ops->var = info->var;
2093 }
2094 updatescrollmode(p, info, vc);
2095 return 0;
2096 }
2097
2098 static int fbcon_switch(struct vc_data *vc)
2099 {
2100 struct fb_info *info, *old_info = NULL;
2101 struct fbcon_ops *ops;
2102 struct display *p = &fb_display[vc->vc_num];
2103 struct fb_var_screeninfo var;
2104 int i, prev_console, charcnt = 256;
2105
2106 info = registered_fb[con2fb_map[vc->vc_num]];
2107 ops = info->fbcon_par;
2108
2109 if (softback_top) {
2110 if (softback_lines)
2111 fbcon_set_origin(vc);
2112 softback_top = softback_curr = softback_in = softback_buf;
2113 softback_lines = 0;
2114 fbcon_update_softback(vc);
2115 }
2116
2117 if (logo_shown >= 0) {
2118 struct vc_data *conp2 = vc_cons[logo_shown].d;
2119
2120 if (conp2->vc_top == logo_lines
2121 && conp2->vc_bottom == conp2->vc_rows)
2122 conp2->vc_top = 0;
2123 logo_shown = FBCON_LOGO_CANSHOW;
2124 }
2125
2126 prev_console = ops->currcon;
2127 if (prev_console != -1)
2128 old_info = registered_fb[con2fb_map[prev_console]];
2129 /*
2130 * FIXME: If we have multiple fbdev's loaded, we need to
2131 * update all info->currcon. Perhaps, we can place this
2132 * in a centralized structure, but this might break some
2133 * drivers.
2134 *
2135 * info->currcon = vc->vc_num;
2136 */
2137 for (i = 0; i < FB_MAX; i++) {
2138 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2139 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2140
2141 o->currcon = vc->vc_num;
2142 }
2143 }
2144 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2145 display_to_var(&var, p);
2146 var.activate = FB_ACTIVATE_NOW;
2147
2148 /*
2149 * make sure we don't unnecessarily trip the memcmp()
2150 * in fb_set_var()
2151 */
2152 info->var.activate = var.activate;
2153 var.yoffset = info->var.yoffset;
2154 var.xoffset = info->var.xoffset;
2155 var.vmode = info->var.vmode;
2156 fb_set_var(info, &var);
2157 ops->var = info->var;
2158
2159 if (old_info != NULL && (old_info != info ||
2160 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2161 if (info->fbops->fb_set_par)
2162 info->fbops->fb_set_par(info);
2163
2164 if (old_info != info)
2165 fbcon_del_cursor_timer(old_info);
2166 }
2167
2168 if (fbcon_is_inactive(vc, info) ||
2169 ops->blank_state != FB_BLANK_UNBLANK)
2170 fbcon_del_cursor_timer(info);
2171 else
2172 fbcon_add_cursor_timer(info);
2173
2174 set_blitting_type(vc, info);
2175 ops->cursor_reset = 1;
2176
2177 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2178 ops->rotate = FB_ROTATE_UR;
2179 set_blitting_type(vc, info);
2180 }
2181
2182 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2183 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2184
2185 if (p->userfont)
2186 charcnt = FNTCHARCNT(vc->vc_font.data);
2187
2188 if (charcnt > 256)
2189 vc->vc_complement_mask <<= 1;
2190
2191 updatescrollmode(p, info, vc);
2192
2193 switch (p->scrollmode) {
2194 case SCROLL_WRAP_MOVE:
2195 scrollback_phys_max = p->vrows - vc->vc_rows;
2196 break;
2197 case SCROLL_PAN_MOVE:
2198 case SCROLL_PAN_REDRAW:
2199 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2200 if (scrollback_phys_max < 0)
2201 scrollback_phys_max = 0;
2202 break;
2203 default:
2204 scrollback_phys_max = 0;
2205 break;
2206 }
2207
2208 scrollback_max = 0;
2209 scrollback_current = 0;
2210
2211 if (!fbcon_is_inactive(vc, info)) {
2212 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2213 ops->update_start(info);
2214 }
2215
2216 fbcon_set_palette(vc, color_table);
2217 fbcon_clear_margins(vc, 0);
2218
2219 if (logo_shown == FBCON_LOGO_DRAW) {
2220
2221 logo_shown = fg_console;
2222 /* This is protected above by initmem_freed */
2223 fb_show_logo(info, ops->rotate);
2224 update_region(vc,
2225 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2226 vc->vc_size_row * (vc->vc_bottom -
2227 vc->vc_top) / 2);
2228 return 0;
2229 }
2230 return 1;
2231 }
2232
2233 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2234 int blank)
2235 {
2236 struct fb_event event;
2237
2238 if (blank) {
2239 unsigned short charmask = vc->vc_hi_font_mask ?
2240 0x1ff : 0xff;
2241 unsigned short oldc;
2242
2243 oldc = vc->vc_video_erase_char;
2244 vc->vc_video_erase_char &= charmask;
2245 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2246 vc->vc_video_erase_char = oldc;
2247 }
2248
2249
2250 event.info = info;
2251 event.data = &blank;
2252 fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2253 }
2254
2255 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2256 {
2257 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2258 struct fbcon_ops *ops = info->fbcon_par;
2259
2260 if (mode_switch) {
2261 struct fb_var_screeninfo var = info->var;
2262
2263 ops->graphics = 1;
2264
2265 if (!blank) {
2266 if (info->fbops->fb_save_state)
2267 info->fbops->fb_save_state(info);
2268 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2269 fb_set_var(info, &var);
2270 ops->graphics = 0;
2271 ops->var = info->var;
2272 } else if (info->fbops->fb_restore_state)
2273 info->fbops->fb_restore_state(info);
2274 }
2275
2276 if (!fbcon_is_inactive(vc, info)) {
2277 if (ops->blank_state != blank) {
2278 ops->blank_state = blank;
2279 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2280 ops->cursor_flash = (!blank);
2281
2282 if (fb_blank(info, blank))
2283 fbcon_generic_blank(vc, info, blank);
2284 }
2285
2286 if (!blank)
2287 update_screen(vc);
2288 }
2289
2290 if (fbcon_is_inactive(vc, info) ||
2291 ops->blank_state != FB_BLANK_UNBLANK)
2292 fbcon_del_cursor_timer(info);
2293 else
2294 fbcon_add_cursor_timer(info);
2295
2296 return 0;
2297 }
2298
2299 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2300 {
2301 u8 *fontdata = vc->vc_font.data;
2302 u8 *data = font->data;
2303 int i, j;
2304
2305 font->width = vc->vc_font.width;
2306 font->height = vc->vc_font.height;
2307 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2308 if (!font->data)
2309 return 0;
2310
2311 if (font->width <= 8) {
2312 j = vc->vc_font.height;
2313 for (i = 0; i < font->charcount; i++) {
2314 memcpy(data, fontdata, j);
2315 memset(data + j, 0, 32 - j);
2316 data += 32;
2317 fontdata += j;
2318 }
2319 } else if (font->width <= 16) {
2320 j = vc->vc_font.height * 2;
2321 for (i = 0; i < font->charcount; i++) {
2322 memcpy(data, fontdata, j);
2323 memset(data + j, 0, 64 - j);
2324 data += 64;
2325 fontdata += j;
2326 }
2327 } else if (font->width <= 24) {
2328 for (i = 0; i < font->charcount; i++) {
2329 for (j = 0; j < vc->vc_font.height; j++) {
2330 *data++ = fontdata[0];
2331 *data++ = fontdata[1];
2332 *data++ = fontdata[2];
2333 fontdata += sizeof(u32);
2334 }
2335 memset(data, 0, 3 * (32 - j));
2336 data += 3 * (32 - j);
2337 }
2338 } else {
2339 j = vc->vc_font.height * 4;
2340 for (i = 0; i < font->charcount; i++) {
2341 memcpy(data, fontdata, j);
2342 memset(data + j, 0, 128 - j);
2343 data += 128;
2344 fontdata += j;
2345 }
2346 }
2347 return 0;
2348 }
2349
2350 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2351 const u8 * data, int userfont)
2352 {
2353 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2354 struct fbcon_ops *ops = info->fbcon_par;
2355 struct display *p = &fb_display[vc->vc_num];
2356 int resize;
2357 int cnt;
2358 char *old_data = NULL;
2359
2360 if (CON_IS_VISIBLE(vc) && softback_lines)
2361 fbcon_set_origin(vc);
2362
2363 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2364 if (p->userfont)
2365 old_data = vc->vc_font.data;
2366 if (userfont)
2367 cnt = FNTCHARCNT(data);
2368 else
2369 cnt = 256;
2370 vc->vc_font.data = (void *)(p->fontdata = data);
2371 if ((p->userfont = userfont))
2372 REFCOUNT(data)++;
2373 vc->vc_font.width = w;
2374 vc->vc_font.height = h;
2375 if (vc->vc_hi_font_mask && cnt == 256) {
2376 vc->vc_hi_font_mask = 0;
2377 if (vc->vc_can_do_color) {
2378 vc->vc_complement_mask >>= 1;
2379 vc->vc_s_complement_mask >>= 1;
2380 }
2381
2382 /* ++Edmund: reorder the attribute bits */
2383 if (vc->vc_can_do_color) {
2384 unsigned short *cp =
2385 (unsigned short *) vc->vc_origin;
2386 int count = vc->vc_screenbuf_size / 2;
2387 unsigned short c;
2388 for (; count > 0; count--, cp++) {
2389 c = scr_readw(cp);
2390 scr_writew(((c & 0xfe00) >> 1) |
2391 (c & 0xff), cp);
2392 }
2393 c = vc->vc_video_erase_char;
2394 vc->vc_video_erase_char =
2395 ((c & 0xfe00) >> 1) | (c & 0xff);
2396 vc->vc_attr >>= 1;
2397 }
2398 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2399 vc->vc_hi_font_mask = 0x100;
2400 if (vc->vc_can_do_color) {
2401 vc->vc_complement_mask <<= 1;
2402 vc->vc_s_complement_mask <<= 1;
2403 }
2404
2405 /* ++Edmund: reorder the attribute bits */
2406 {
2407 unsigned short *cp =
2408 (unsigned short *) vc->vc_origin;
2409 int count = vc->vc_screenbuf_size / 2;
2410 unsigned short c;
2411 for (; count > 0; count--, cp++) {
2412 unsigned short newc;
2413 c = scr_readw(cp);
2414 if (vc->vc_can_do_color)
2415 newc =
2416 ((c & 0xff00) << 1) | (c &
2417 0xff);
2418 else
2419 newc = c & ~0x100;
2420 scr_writew(newc, cp);
2421 }
2422 c = vc->vc_video_erase_char;
2423 if (vc->vc_can_do_color) {
2424 vc->vc_video_erase_char =
2425 ((c & 0xff00) << 1) | (c & 0xff);
2426 vc->vc_attr <<= 1;
2427 } else
2428 vc->vc_video_erase_char = c & ~0x100;
2429 }
2430
2431 }
2432
2433 if (resize) {
2434 int cols, rows;
2435
2436 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2437 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2438 cols /= w;
2439 rows /= h;
2440 vc_resize(vc, cols, rows);
2441 if (CON_IS_VISIBLE(vc) && softback_buf)
2442 fbcon_update_softback(vc);
2443 } else if (CON_IS_VISIBLE(vc)
2444 && vc->vc_mode == KD_TEXT) {
2445 fbcon_clear_margins(vc, 0);
2446 update_screen(vc);
2447 }
2448
2449 if (old_data && (--REFCOUNT(old_data) == 0))
2450 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2451 return 0;
2452 }
2453
2454 static int fbcon_copy_font(struct vc_data *vc, int con)
2455 {
2456 struct display *od = &fb_display[con];
2457 struct console_font *f = &vc->vc_font;
2458
2459 if (od->fontdata == f->data)
2460 return 0; /* already the same font... */
2461 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2462 }
2463
2464 /*
2465 * User asked to set font; we are guaranteed that
2466 * a) width and height are in range 1..32
2467 * b) charcount does not exceed 512
2468 * but lets not assume that, since someone might someday want to use larger
2469 * fonts. And charcount of 512 is small for unicode support.
2470 *
2471 * However, user space gives the font in 32 rows , regardless of
2472 * actual font height. So a new API is needed if support for larger fonts
2473 * is ever implemented.
2474 */
2475
2476 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2477 {
2478 unsigned charcount = font->charcount;
2479 int w = font->width;
2480 int h = font->height;
2481 int size;
2482 int i, csum;
2483 u8 *new_data, *data = font->data;
2484 int pitch = (font->width+7) >> 3;
2485
2486 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2487 * If not this check should be changed to charcount < 256 */
2488 if (charcount != 256 && charcount != 512)
2489 return -EINVAL;
2490
2491 size = h * pitch * charcount;
2492
2493 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2494
2495 if (!new_data)
2496 return -ENOMEM;
2497
2498 new_data += FONT_EXTRA_WORDS * sizeof(int);
2499 FNTSIZE(new_data) = size;
2500 FNTCHARCNT(new_data) = charcount;
2501 REFCOUNT(new_data) = 0; /* usage counter */
2502 for (i=0; i< charcount; i++) {
2503 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2504 }
2505
2506 /* Since linux has a nice crc32 function use it for counting font
2507 * checksums. */
2508 csum = crc32(0, new_data, size);
2509
2510 FNTSUM(new_data) = csum;
2511 /* Check if the same font is on some other console already */
2512 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2513 struct vc_data *tmp = vc_cons[i].d;
2514
2515 if (fb_display[i].userfont &&
2516 fb_display[i].fontdata &&
2517 FNTSUM(fb_display[i].fontdata) == csum &&
2518 FNTSIZE(fb_display[i].fontdata) == size &&
2519 tmp->vc_font.width == w &&
2520 !memcmp(fb_display[i].fontdata, new_data, size)) {
2521 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2522 new_data = (u8 *)fb_display[i].fontdata;
2523 break;
2524 }
2525 }
2526 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2527 }
2528
2529 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2530 {
2531 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2532 const struct font_desc *f;
2533
2534 if (!name)
2535 f = get_default_font(info->var.xres, info->var.yres);
2536 else if (!(f = find_font(name)))
2537 return -ENOENT;
2538
2539 font->width = f->width;
2540 font->height = f->height;
2541 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2542 }
2543
2544 static u16 palette_red[16];
2545 static u16 palette_green[16];
2546 static u16 palette_blue[16];
2547
2548 static struct fb_cmap palette_cmap = {
2549 0, 16, palette_red, palette_green, palette_blue, NULL
2550 };
2551
2552 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2553 {
2554 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2555 int i, j, k, depth;
2556 u8 val;
2557
2558 if (fbcon_is_inactive(vc, info))
2559 return -EINVAL;
2560
2561 if (!CON_IS_VISIBLE(vc))
2562 return 0;
2563
2564 depth = fb_get_color_depth(&info->var, &info->fix);
2565 if (depth > 3) {
2566 for (i = j = 0; i < 16; i++) {
2567 k = table[i];
2568 val = vc->vc_palette[j++];
2569 palette_red[k] = (val << 8) | val;
2570 val = vc->vc_palette[j++];
2571 palette_green[k] = (val << 8) | val;
2572 val = vc->vc_palette[j++];
2573 palette_blue[k] = (val << 8) | val;
2574 }
2575 palette_cmap.len = 16;
2576 palette_cmap.start = 0;
2577 /*
2578 * If framebuffer is capable of less than 16 colors,
2579 * use default palette of fbcon.
2580 */
2581 } else
2582 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2583
2584 return fb_set_cmap(&palette_cmap, info);
2585 }
2586
2587 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2588 {
2589 unsigned long p;
2590 int line;
2591
2592 if (vc->vc_num != fg_console || !softback_lines)
2593 return (u16 *) (vc->vc_origin + offset);
2594 line = offset / vc->vc_size_row;
2595 if (line >= softback_lines)
2596 return (u16 *) (vc->vc_origin + offset -
2597 softback_lines * vc->vc_size_row);
2598 p = softback_curr + offset;
2599 if (p >= softback_end)
2600 p += softback_buf - softback_end;
2601 return (u16 *) p;
2602 }
2603
2604 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2605 int *px, int *py)
2606 {
2607 unsigned long ret;
2608 int x, y;
2609
2610 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2611 unsigned long offset = (pos - vc->vc_origin) / 2;
2612
2613 x = offset % vc->vc_cols;
2614 y = offset / vc->vc_cols;
2615 if (vc->vc_num == fg_console)
2616 y += softback_lines;
2617 ret = pos + (vc->vc_cols - x) * 2;
2618 } else if (vc->vc_num == fg_console && softback_lines) {
2619 unsigned long offset = pos - softback_curr;
2620
2621 if (pos < softback_curr)
2622 offset += softback_end - softback_buf;
2623 offset /= 2;
2624 x = offset % vc->vc_cols;
2625 y = offset / vc->vc_cols;
2626 ret = pos + (vc->vc_cols - x) * 2;
2627 if (ret == softback_end)
2628 ret = softback_buf;
2629 if (ret == softback_in)
2630 ret = vc->vc_origin;
2631 } else {
2632 /* Should not happen */
2633 x = y = 0;
2634 ret = vc->vc_origin;
2635 }
2636 if (px)
2637 *px = x;
2638 if (py)
2639 *py = y;
2640 return ret;
2641 }
2642
2643 /* As we might be inside of softback, we may work with non-contiguous buffer,
2644 that's why we have to use a separate routine. */
2645 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2646 {
2647 while (cnt--) {
2648 u16 a = scr_readw(p);
2649 if (!vc->vc_can_do_color)
2650 a ^= 0x0800;
2651 else if (vc->vc_hi_font_mask == 0x100)
2652 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2653 (((a) & 0x0e00) << 4);
2654 else
2655 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2656 (((a) & 0x0700) << 4);
2657 scr_writew(a, p++);
2658 if (p == (u16 *) softback_end)
2659 p = (u16 *) softback_buf;
2660 if (p == (u16 *) softback_in)
2661 p = (u16 *) vc->vc_origin;
2662 }
2663 }
2664
2665 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2666 {
2667 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2668 struct fbcon_ops *ops = info->fbcon_par;
2669 struct display *p = &fb_display[fg_console];
2670 int offset, limit, scrollback_old;
2671
2672 if (softback_top) {
2673 if (vc->vc_num != fg_console)
2674 return 0;
2675 if (vc->vc_mode != KD_TEXT || !lines)
2676 return 0;
2677 if (logo_shown >= 0) {
2678 struct vc_data *conp2 = vc_cons[logo_shown].d;
2679
2680 if (conp2->vc_top == logo_lines
2681 && conp2->vc_bottom == conp2->vc_rows)
2682 conp2->vc_top = 0;
2683 if (logo_shown == vc->vc_num) {
2684 unsigned long p, q;
2685 int i;
2686
2687 p = softback_in;
2688 q = vc->vc_origin +
2689 logo_lines * vc->vc_size_row;
2690 for (i = 0; i < logo_lines; i++) {
2691 if (p == softback_top)
2692 break;
2693 if (p == softback_buf)
2694 p = softback_end;
2695 p -= vc->vc_size_row;
2696 q -= vc->vc_size_row;
2697 scr_memcpyw((u16 *) q, (u16 *) p,
2698 vc->vc_size_row);
2699 }
2700 softback_in = softback_curr = p;
2701 update_region(vc, vc->vc_origin,
2702 logo_lines * vc->vc_cols);
2703 }
2704 logo_shown = FBCON_LOGO_CANSHOW;
2705 }
2706 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2707 fbcon_redraw_softback(vc, p, lines);
2708 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2709 return 0;
2710 }
2711
2712 if (!scrollback_phys_max)
2713 return -ENOSYS;
2714
2715 scrollback_old = scrollback_current;
2716 scrollback_current -= lines;
2717 if (scrollback_current < 0)
2718 scrollback_current = 0;
2719 else if (scrollback_current > scrollback_max)
2720 scrollback_current = scrollback_max;
2721 if (scrollback_current == scrollback_old)
2722 return 0;
2723
2724 if (fbcon_is_inactive(vc, info))
2725 return 0;
2726
2727 fbcon_cursor(vc, CM_ERASE);
2728
2729 offset = p->yscroll - scrollback_current;
2730 limit = p->vrows;
2731 switch (p->scrollmode) {
2732 case SCROLL_WRAP_MOVE:
2733 info->var.vmode |= FB_VMODE_YWRAP;
2734 break;
2735 case SCROLL_PAN_MOVE:
2736 case SCROLL_PAN_REDRAW:
2737 limit -= vc->vc_rows;
2738 info->var.vmode &= ~FB_VMODE_YWRAP;
2739 break;
2740 }
2741 if (offset < 0)
2742 offset += limit;
2743 else if (offset >= limit)
2744 offset -= limit;
2745
2746 ops->var.xoffset = 0;
2747 ops->var.yoffset = offset * vc->vc_font.height;
2748 ops->update_start(info);
2749
2750 if (!scrollback_current)
2751 fbcon_cursor(vc, CM_DRAW);
2752 return 0;
2753 }
2754
2755 static int fbcon_set_origin(struct vc_data *vc)
2756 {
2757 if (softback_lines)
2758 fbcon_scrolldelta(vc, softback_lines);
2759 return 0;
2760 }
2761
2762 static void fbcon_suspended(struct fb_info *info)
2763 {
2764 struct vc_data *vc = NULL;
2765 struct fbcon_ops *ops = info->fbcon_par;
2766
2767 if (!ops || ops->currcon < 0)
2768 return;
2769 vc = vc_cons[ops->currcon].d;
2770
2771 /* Clear cursor, restore saved data */
2772 fbcon_cursor(vc, CM_ERASE);
2773 }
2774
2775 static void fbcon_resumed(struct fb_info *info)
2776 {
2777 struct vc_data *vc;
2778 struct fbcon_ops *ops = info->fbcon_par;
2779
2780 if (!ops || ops->currcon < 0)
2781 return;
2782 vc = vc_cons[ops->currcon].d;
2783
2784 update_screen(vc);
2785 }
2786
2787 static void fbcon_modechanged(struct fb_info *info)
2788 {
2789 struct fbcon_ops *ops = info->fbcon_par;
2790 struct vc_data *vc;
2791 struct display *p;
2792 int rows, cols;
2793
2794 if (!ops || ops->currcon < 0)
2795 return;
2796 vc = vc_cons[ops->currcon].d;
2797 if (vc->vc_mode != KD_TEXT ||
2798 registered_fb[con2fb_map[ops->currcon]] != info)
2799 return;
2800
2801 p = &fb_display[vc->vc_num];
2802 set_blitting_type(vc, info);
2803
2804 if (CON_IS_VISIBLE(vc)) {
2805 var_to_display(p, &info->var, info);
2806 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2807 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2808 cols /= vc->vc_font.width;
2809 rows /= vc->vc_font.height;
2810 vc_resize(vc, cols, rows);
2811 updatescrollmode(p, info, vc);
2812 scrollback_max = 0;
2813 scrollback_current = 0;
2814
2815 if (!fbcon_is_inactive(vc, info)) {
2816 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2817 ops->update_start(info);
2818 }
2819
2820 fbcon_set_palette(vc, color_table);
2821 update_screen(vc);
2822 if (softback_buf)
2823 fbcon_update_softback(vc);
2824 }
2825 }
2826
2827 static void fbcon_set_all_vcs(struct fb_info *info)
2828 {
2829 struct fbcon_ops *ops = info->fbcon_par;
2830 struct vc_data *vc;
2831 struct display *p;
2832 int i, rows, cols;
2833
2834 if (!ops || ops->currcon < 0)
2835 return;
2836
2837 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2838 vc = vc_cons[i].d;
2839 if (!vc || vc->vc_mode != KD_TEXT ||
2840 registered_fb[con2fb_map[i]] != info)
2841 continue;
2842
2843 p = &fb_display[vc->vc_num];
2844 set_blitting_type(vc, info);
2845 var_to_display(p, &info->var, info);
2846 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2847 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2848 cols /= vc->vc_font.width;
2849 rows /= vc->vc_font.height;
2850 vc_resize(vc, cols, rows);
2851
2852 if (CON_IS_VISIBLE(vc)) {
2853 updatescrollmode(p, info, vc);
2854 scrollback_max = 0;
2855 scrollback_current = 0;
2856
2857 if (!fbcon_is_inactive(vc, info)) {
2858 ops->var.xoffset = ops->var.yoffset =
2859 p->yscroll = 0;
2860 ops->update_start(info);
2861 }
2862
2863 fbcon_set_palette(vc, color_table);
2864 update_screen(vc);
2865 if (softback_buf)
2866 fbcon_update_softback(vc);
2867 }
2868 }
2869
2870 ops->p = &fb_display[ops->currcon];
2871 }
2872
2873 static int fbcon_mode_deleted(struct fb_info *info,
2874 struct fb_videomode *mode)
2875 {
2876 struct fb_info *fb_info;
2877 struct display *p;
2878 int i, j, found = 0;
2879
2880 /* before deletion, ensure that mode is not in use */
2881 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2882 j = con2fb_map[i];
2883 if (j == -1)
2884 continue;
2885 fb_info = registered_fb[j];
2886 if (fb_info != info)
2887 continue;
2888 p = &fb_display[i];
2889 if (!p || !p->mode)
2890 continue;
2891 if (fb_mode_is_equal(p->mode, mode)) {
2892 found = 1;
2893 break;
2894 }
2895 }
2896 return found;
2897 }
2898
2899 static int fbcon_fb_unregistered(int idx)
2900 {
2901 int i;
2902
2903 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2904 if (con2fb_map[i] == idx)
2905 con2fb_map[i] = -1;
2906 }
2907
2908 if (idx == info_idx) {
2909 info_idx = -1;
2910
2911 for (i = 0; i < FB_MAX; i++) {
2912 if (registered_fb[i] != NULL) {
2913 info_idx = i;
2914 break;
2915 }
2916 }
2917 }
2918
2919 if (info_idx != -1) {
2920 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2921 if (con2fb_map[i] == -1)
2922 con2fb_map[i] = info_idx;
2923 }
2924 }
2925
2926 if (!num_registered_fb)
2927 unregister_con_driver(&fb_con);
2928
2929 return 0;
2930 }
2931
2932 static int fbcon_fb_registered(int idx)
2933 {
2934 int ret = 0, i;
2935
2936 if (info_idx == -1) {
2937 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2938 if (con2fb_map_boot[i] == idx) {
2939 info_idx = idx;
2940 break;
2941 }
2942 }
2943
2944 if (info_idx != -1)
2945 ret = fbcon_takeover(1);
2946 } else {
2947 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2948 if (con2fb_map_boot[i] == idx &&
2949 con2fb_map[i] == -1)
2950 set_con2fb_map(i, idx, 0);
2951 }
2952 }
2953
2954 return ret;
2955 }
2956
2957 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2958 {
2959 struct fbcon_ops *ops = info->fbcon_par;
2960 struct vc_data *vc;
2961
2962 if (!ops || ops->currcon < 0)
2963 return;
2964
2965 vc = vc_cons[ops->currcon].d;
2966 if (vc->vc_mode != KD_TEXT ||
2967 registered_fb[con2fb_map[ops->currcon]] != info)
2968 return;
2969
2970 if (CON_IS_VISIBLE(vc)) {
2971 if (blank)
2972 do_blank_screen(0);
2973 else
2974 do_unblank_screen(0);
2975 }
2976 ops->blank_state = blank;
2977 }
2978
2979 static void fbcon_new_modelist(struct fb_info *info)
2980 {
2981 int i;
2982 struct vc_data *vc;
2983 struct fb_var_screeninfo var;
2984 const struct fb_videomode *mode;
2985
2986 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2987 if (registered_fb[con2fb_map[i]] != info)
2988 continue;
2989 if (!fb_display[i].mode)
2990 continue;
2991 vc = vc_cons[i].d;
2992 display_to_var(&var, &fb_display[i]);
2993 mode = fb_find_nearest_mode(fb_display[i].mode,
2994 &info->modelist);
2995 fb_videomode_to_var(&var, mode);
2996
2997 if (vc)
2998 fbcon_set_disp(info, &var, vc);
2999 else
3000 fbcon_preset_disp(info, &var, i);
3001
3002 }
3003 }
3004
3005 static int fbcon_event_notify(struct notifier_block *self,
3006 unsigned long action, void *data)
3007 {
3008 struct fb_event *event = data;
3009 struct fb_info *info = event->info;
3010 struct fb_videomode *mode;
3011 struct fb_con2fbmap *con2fb;
3012 int ret = 0;
3013
3014 /*
3015 * ignore all events except driver registration and deregistration
3016 * if fbcon is not active
3017 */
3018 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3019 action == FB_EVENT_FB_UNREGISTERED))
3020 goto done;
3021
3022 switch(action) {
3023 case FB_EVENT_SUSPEND:
3024 fbcon_suspended(info);
3025 break;
3026 case FB_EVENT_RESUME:
3027 fbcon_resumed(info);
3028 break;
3029 case FB_EVENT_MODE_CHANGE:
3030 fbcon_modechanged(info);
3031 break;
3032 case FB_EVENT_MODE_CHANGE_ALL:
3033 fbcon_set_all_vcs(info);
3034 break;
3035 case FB_EVENT_MODE_DELETE:
3036 mode = event->data;
3037 ret = fbcon_mode_deleted(info, mode);
3038 break;
3039 case FB_EVENT_FB_REGISTERED:
3040 ret = fbcon_fb_registered(info->node);
3041 break;
3042 case FB_EVENT_FB_UNREGISTERED:
3043 ret = fbcon_fb_unregistered(info->node);
3044 break;
3045 case FB_EVENT_SET_CONSOLE_MAP:
3046 con2fb = event->data;
3047 ret = set_con2fb_map(con2fb->console - 1,
3048 con2fb->framebuffer, 1);
3049 break;
3050 case FB_EVENT_GET_CONSOLE_MAP:
3051 con2fb = event->data;
3052 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3053 break;
3054 case FB_EVENT_BLANK:
3055 fbcon_fb_blanked(info, *(int *)event->data);
3056 break;
3057 case FB_EVENT_NEW_MODELIST:
3058 fbcon_new_modelist(info);
3059 break;
3060 }
3061
3062 done:
3063 return ret;
3064 }
3065
3066 /*
3067 * The console `switch' structure for the frame buffer based console
3068 */
3069
3070 static const struct consw fb_con = {
3071 .owner = THIS_MODULE,
3072 .con_startup = fbcon_startup,
3073 .con_init = fbcon_init,
3074 .con_deinit = fbcon_deinit,
3075 .con_clear = fbcon_clear,
3076 .con_putc = fbcon_putc,
3077 .con_putcs = fbcon_putcs,
3078 .con_cursor = fbcon_cursor,
3079 .con_scroll = fbcon_scroll,
3080 .con_bmove = fbcon_bmove,
3081 .con_switch = fbcon_switch,
3082 .con_blank = fbcon_blank,
3083 .con_font_set = fbcon_set_font,
3084 .con_font_get = fbcon_get_font,
3085 .con_font_default = fbcon_set_def_font,
3086 .con_font_copy = fbcon_copy_font,
3087 .con_set_palette = fbcon_set_palette,
3088 .con_scrolldelta = fbcon_scrolldelta,
3089 .con_set_origin = fbcon_set_origin,
3090 .con_invert_region = fbcon_invert_region,
3091 .con_screen_pos = fbcon_screen_pos,
3092 .con_getxy = fbcon_getxy,
3093 .con_resize = fbcon_resize,
3094 };
3095
3096 static struct notifier_block fbcon_event_notifier = {
3097 .notifier_call = fbcon_event_notify,
3098 };
3099
3100 static ssize_t store_rotate(struct class_device *class_device,
3101 const char *buf, size_t count)
3102 {
3103 struct fb_info *info;
3104 int rotate, idx;
3105 char **last = NULL;
3106
3107 if (fbcon_has_exited)
3108 return count;
3109
3110 acquire_console_sem();
3111 idx = con2fb_map[fg_console];
3112
3113 if (idx == -1 || registered_fb[idx] == NULL)
3114 goto err;
3115
3116 info = registered_fb[idx];
3117 rotate = simple_strtoul(buf, last, 0);
3118 fbcon_rotate(info, rotate);
3119 err:
3120 release_console_sem();
3121 return count;
3122 }
3123
3124 static ssize_t store_rotate_all(struct class_device *class_device,
3125 const char *buf, size_t count)
3126 {
3127 struct fb_info *info;
3128 int rotate, idx;
3129 char **last = NULL;
3130
3131 if (fbcon_has_exited)
3132 return count;
3133
3134 acquire_console_sem();
3135 idx = con2fb_map[fg_console];
3136
3137 if (idx == -1 || registered_fb[idx] == NULL)
3138 goto err;
3139
3140 info = registered_fb[idx];
3141 rotate = simple_strtoul(buf, last, 0);
3142 fbcon_rotate_all(info, rotate);
3143 err:
3144 release_console_sem();
3145 return count;
3146 }
3147
3148 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3149 {
3150 struct fb_info *info;
3151 int rotate = 0, idx;
3152
3153 if (fbcon_has_exited)
3154 return 0;
3155
3156 acquire_console_sem();
3157 idx = con2fb_map[fg_console];
3158
3159 if (idx == -1 || registered_fb[idx] == NULL)
3160 goto err;
3161
3162 info = registered_fb[idx];
3163 rotate = fbcon_get_rotate(info);
3164 err:
3165 release_console_sem();
3166 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3167 }
3168
3169 static struct class_device_attribute class_device_attrs[] = {
3170 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3171 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3172 };
3173
3174 static int fbcon_init_class_device(void)
3175 {
3176 int i, error = 0;
3177
3178 fbcon_has_sysfs = 1;
3179
3180 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3181 error = class_device_create_file(fbcon_class_device,
3182 &class_device_attrs[i]);
3183
3184 if (error)
3185 break;
3186 }
3187
3188 if (error) {
3189 while (--i >= 0)
3190 class_device_remove_file(fbcon_class_device,
3191 &class_device_attrs[i]);
3192
3193 fbcon_has_sysfs = 0;
3194 }
3195
3196 return 0;
3197 }
3198
3199 static void fbcon_start(void)
3200 {
3201 if (num_registered_fb) {
3202 int i;
3203
3204 acquire_console_sem();
3205
3206 for (i = 0; i < FB_MAX; i++) {
3207 if (registered_fb[i] != NULL) {
3208 info_idx = i;
3209 break;
3210 }
3211 }
3212
3213 release_console_sem();
3214 fbcon_takeover(0);
3215 }
3216 }
3217
3218 static void fbcon_exit(void)
3219 {
3220 struct fb_info *info;
3221 int i, j, mapped;
3222
3223 if (fbcon_has_exited)
3224 return;
3225
3226 #ifdef CONFIG_ATARI
3227 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3228 #endif
3229 #ifdef CONFIG_MAC
3230 if (MACH_IS_MAC && vbl_detected)
3231 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3232 #endif
3233
3234 kfree((void *)softback_buf);
3235 softback_buf = 0UL;
3236
3237 for (i = 0; i < FB_MAX; i++) {
3238 mapped = 0;
3239 info = registered_fb[i];
3240
3241 if (info == NULL)
3242 continue;
3243
3244 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3245 if (con2fb_map[j] == i)
3246 mapped = 1;
3247 }
3248
3249 if (mapped) {
3250 if (info->fbops->fb_release)
3251 info->fbops->fb_release(info, 0);
3252 module_put(info->fbops->owner);
3253
3254 if (info->fbcon_par) {
3255 struct fbcon_ops *ops = info->fbcon_par;
3256
3257 fbcon_del_cursor_timer(info);
3258 kfree(ops->cursor_src);
3259 kfree(info->fbcon_par);
3260 info->fbcon_par = NULL;
3261 }
3262
3263 if (info->queue.func == fb_flashcursor)
3264 info->queue.func = NULL;
3265 }
3266 }
3267
3268 fbcon_has_exited = 1;
3269 }
3270
3271 static int __init fb_console_init(void)
3272 {
3273 int i;
3274
3275 acquire_console_sem();
3276 fb_register_client(&fbcon_event_notifier);
3277 fbcon_class_device =
3278 class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3279
3280 if (IS_ERR(fbcon_class_device)) {
3281 printk(KERN_WARNING "Unable to create class_device "
3282 "for fbcon; errno = %ld\n",
3283 PTR_ERR(fbcon_class_device));
3284 fbcon_class_device = NULL;
3285 } else
3286 fbcon_init_class_device();
3287
3288 for (i = 0; i < MAX_NR_CONSOLES; i++)
3289 con2fb_map[i] = -1;
3290
3291 release_console_sem();
3292 fbcon_start();
3293 return 0;
3294 }
3295
3296 module_init(fb_console_init);
3297
3298 #ifdef MODULE
3299
3300 static void __exit fbcon_deinit_class_device(void)
3301 {
3302 int i;
3303
3304 if (fbcon_has_sysfs) {
3305 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3306 class_device_remove_file(fbcon_class_device,
3307 &class_device_attrs[i]);
3308
3309 fbcon_has_sysfs = 0;
3310 }
3311 }
3312
3313 static void __exit fb_console_exit(void)
3314 {
3315 acquire_console_sem();
3316 fb_unregister_client(&fbcon_event_notifier);
3317 fbcon_deinit_class_device();
3318 class_device_destroy(fb_class, MKDEV(0, 0));
3319 fbcon_exit();
3320 release_console_sem();
3321 unregister_con_driver(&fb_con);
3322 }
3323
3324 module_exit(fb_console_exit);
3325
3326 #endif
3327
3328 MODULE_LICENSE("GPL");
WRT350N Kernel Patches