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[PATCH] fix the survivors of fbcon_vbl_handler() renaming
[deliverable/linux.git] / drivers / video / console / fbcon.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59#undef FBCONDEBUG
60
1da177e4
LT		 61#include <linux/module.h>
62#include <linux/types.h>
63#include <linux/sched.h>
64#include <linux/fs.h>
65#include <linux/kernel.h>
66#include <linux/delay.h> /* MSch: for IRQ probe */
1da177e4
LT		 67#include <linux/console.h>
68#include <linux/string.h>
69#include <linux/kd.h>
70#include <linux/slab.h>
71#include <linux/fb.h>
72#include <linux/vt_kern.h>
73#include <linux/selection.h>
74#include <linux/font.h>
75#include <linux/smp.h>
76#include <linux/init.h>
77#include <linux/interrupt.h>
78#include <linux/crc32.h> /* For counting font checksums */
79#include <asm/irq.h>
80#include <asm/system.h>
81#include <asm/uaccess.h>
82#ifdef CONFIG_ATARI
83#include <asm/atariints.h>
84#endif
85#ifdef CONFIG_MAC
86#include <asm/macints.h>
87#endif
88#if defined(__mc68000__) || defined(CONFIG_APUS)
89#include <asm/machdep.h>
90#include <asm/setup.h>
91#endif
92
93#include "fbcon.h"
94
95#ifdef FBCONDEBUG
96# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
97#else
98# define DPRINTK(fmt, args...)
99#endif
100
101enum {
102 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
103 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
104 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
105};
106
ab767201 107static struct display fb_display[MAX_NR_CONSOLES];
e4fc2761 108
1da177e4
LT		 109static signed char con2fb_map[MAX_NR_CONSOLES];
110static signed char con2fb_map_boot[MAX_NR_CONSOLES];
111static int logo_height;
112static int logo_lines;
113/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
114 enums. */
115static int logo_shown = FBCON_LOGO_CANSHOW;
116/* Software scrollback */
117static int fbcon_softback_size = 32768;
118static unsigned long softback_buf, softback_curr;
119static unsigned long softback_in;
120static unsigned long softback_top, softback_end;
121static int softback_lines;
122/* console mappings */
123static int first_fb_vc;
124static int last_fb_vc = MAX_NR_CONSOLES - 1;
125static int fbcon_is_default = 1;
e614b18d
AD		 126static int fbcon_has_exited;
127
1da177e4
LT		 128/* font data */
129static char fontname[40];
130
131/* current fb_info */
132static int info_idx = -1;
133
e4fc2761
AD		 134/* console rotation */
135static int rotate;
136
1da177e4
LT		 137static const struct consw fb_con;
138
139#define CM_SOFTBACK (8)
140
141#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
142
1da177e4
LT		 143static int fbcon_set_origin(struct vc_data *);
144
145#define CURSOR_DRAW_DELAY (1)
146
147/* # VBL ints between cursor state changes */
1da177e4
LT		 148#define ATARI_CURSOR_BLINK_RATE (42)
149#define MAC_CURSOR_BLINK_RATE (32)
150#define DEFAULT_CURSOR_BLINK_RATE (20)
151
152static 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
160static const char *fbcon_startup(void);
161static void fbcon_init(struct vc_data *vc, int init);
162static void fbcon_deinit(struct vc_data *vc);
163static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
164 int width);
165static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
166static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
167 int count, int ypos, int xpos);
168static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
169static void fbcon_cursor(struct vc_data *vc, int mode);
170static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
171 int count);
172static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
173 int height, int width);
174static int fbcon_switch(struct vc_data *vc);
175static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
176static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
177static int fbcon_scrolldelta(struct vc_data *vc, int lines);
178
179/*
180 * Internal routines
181 */
1da177e4
LT		 182static __inline__ void ywrap_up(struct vc_data *vc, int count);
183static __inline__ void ywrap_down(struct vc_data *vc, int count);
184static __inline__ void ypan_up(struct vc_data *vc, int count);
185static __inline__ void ypan_down(struct vc_data *vc, int count);
186static 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);
188static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
189 struct vc_data *vc);
190static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
191 int unit);
192static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
193 int line, int count, int dy);
a812c94b
AD		 194static void fbcon_modechanged(struct fb_info *info);
195static void fbcon_set_all_vcs(struct fb_info *info);
5428b044
AD		 196static void fbcon_start(void);
197static void fbcon_exit(void);
9a179176
AD		 198static struct class_device *fbcon_class_device;
199
1da177e4
LT		 200#ifdef CONFIG_MAC
201/*
202 * On the Macintoy, there may or may not be a working VBL int. We need to probe
203 */
204static int vbl_detected;
205
206static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
207{
208 vbl_detected++;
209 return IRQ_HANDLED;
210}
211#endif
212
dbcbfe1e 213#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
b73deed3 214static inline void fbcon_set_rotation(struct fb_info *info)
dbcbfe1e
AD		 215{
216 struct fbcon_ops *ops = info->fbcon_par;
217
218 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
b73deed3
AD		 219 ops->p->con_rotate < 4)
220 ops->rotate = ops->p->con_rotate;
dbcbfe1e
AD		 221 else
222 ops->rotate = 0;
223}
a812c94b
AD		 224
225static 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
247static 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
e614b18d 257 for (i = first_fb_vc; i <= last_fb_vc; i++) {
a812c94b
AD		 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}
dbcbfe1e 269#else
b73deed3 270static inline void fbcon_set_rotation(struct fb_info *info)
e4fc2761
AD		 271{
272 struct fbcon_ops *ops = info->fbcon_par;
273
274 ops->rotate = FB_ROTATE_UR;
275}
a812c94b
AD		 276
277static void fbcon_rotate(struct fb_info *info, u32 rotate)
278{
279 return;
280}
281
282static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
283{
284 return;
285}
dbcbfe1e 286#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
e4fc2761 287
a812c94b
AD		 288static 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
1da177e4
LT		 295static 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
303static inline int get_color(struct vc_data *vc, struct fb_info *info,
304 u16 c, int is_fg)
305{
b8c90945 306 int depth = fb_get_color_depth(&info->var, &info->fix);
1da177e4
LT		 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 {
b8c90945
AD		 322 int col = ~(0xfff << (max(info->var.green.length,
323 max(info->var.red.length,
324 info->var.blue.length)))) & 0xff;
325
1da177e4 326 /* 0 or 1 */
b8c90945
AD		 327 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
328 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
1da177e4
LT		 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
2cc38ed1
AD		 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.
1da177e4 343 */
2cc38ed1
AD		 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;
1da177e4
LT		 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
4d9c5b6e
AD		 373static 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
1da177e4
LT		 385static void fb_flashcursor(void *private)
386{
387 struct fb_info *info = private;
388 struct fbcon_ops *ops = info->fbcon_par;
389 struct display *p;
390 struct vc_data *vc = NULL;
391 int c;
392 int mode;
393
5428b044
AD		 394 acquire_console_sem();
395 if (ops && ops->currcon != -1)
1da177e4
LT		 396 vc = vc_cons[ops->currcon].d;
397
398 if (!vc || !CON_IS_VISIBLE(vc) ||
399 fbcon_is_inactive(vc, info) ||
dbd4f128 400 registered_fb[con2fb_map[vc->vc_num]] != info ||
5428b044
AD		 401 vc_cons[ops->currcon].d->vc_deccm != 1) {
402 release_console_sem();
1da177e4 403 return;
5428b044
AD		 404 }
405
1da177e4
LT		 406 p = &fb_display[vc->vc_num];
407 c = scr_readw((u16 *) vc->vc_pos);
408 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
409 CM_ERASE : CM_DRAW;
b73deed3 410 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
1da177e4
LT		 411 get_color(vc, info, c, 0));
412 release_console_sem();
413}
414
41359dca 415#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
1da177e4
LT		 416static int cursor_blink_rate;
417static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
418{
419 struct fb_info *info = dev_id;
420
421 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
422 schedule_work(&info->queue);
423 vbl_cursor_cnt = cursor_blink_rate;
424 }
425 return IRQ_HANDLED;
426}
427#endif
428
429static void cursor_timer_handler(unsigned long dev_addr)
430{
431 struct fb_info *info = (struct fb_info *) dev_addr;
432 struct fbcon_ops *ops = info->fbcon_par;
433
434 schedule_work(&info->queue);
435 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
436}
437
88fb2c6e
AD		 438static void fbcon_add_cursor_timer(struct fb_info *info)
439{
440 struct fbcon_ops *ops = info->fbcon_par;
441
442 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
443 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
444 if (!info->queue.func)
445 INIT_WORK(&info->queue, fb_flashcursor, info);
446
447 init_timer(&ops->cursor_timer);
448 ops->cursor_timer.function = cursor_timer_handler;
449 ops->cursor_timer.expires = jiffies + HZ / 5;
450 ops->cursor_timer.data = (unsigned long ) info;
451 add_timer(&ops->cursor_timer);
452 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
453 }
454}
455
456static void fbcon_del_cursor_timer(struct fb_info *info)
457{
458 struct fbcon_ops *ops = info->fbcon_par;
459
460 if (info->queue.func == fb_flashcursor &&
461 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
462 del_timer_sync(&ops->cursor_timer);
463 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
464 }
465}
466
1da177e4
LT		 467#ifndef MODULE
468static int __init fb_console_setup(char *this_opt)
469{
470 char *options;
471 int i, j;
472
473 if (!this_opt || !*this_opt)
9b41046c 474 return 1;
1da177e4
LT		 475
476 while ((options = strsep(&this_opt, ",")) != NULL) {
477 if (!strncmp(options, "font:", 5))
478 strcpy(fontname, options + 5);
479
480 if (!strncmp(options, "scrollback:", 11)) {
481 options += 11;
482 if (*options) {
483 fbcon_softback_size = simple_strtoul(options, &options, 0);
484 if (*options == 'k' || *options == 'K') {
485 fbcon_softback_size *= 1024;
486 options++;
487 }
488 if (*options != ',')
9b41046c 489 return 1;
1da177e4
LT		 490 options++;
491 } else
9b41046c 492 return 1;
1da177e4
LT		 493 }
494
495 if (!strncmp(options, "map:", 4)) {
496 options += 4;
497 if (*options)
498 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
499 if (!options[j])
500 j = 0;
501 con2fb_map_boot[i] =
502 (options[j++]-'0') % FB_MAX;
503 }
9b41046c 504 return 1;
1da177e4
LT		 505 }
506
507 if (!strncmp(options, "vc:", 3)) {
508 options += 3;
509 if (*options)
510 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
511 if (first_fb_vc < 0)
512 first_fb_vc = 0;
513 if (*options++ == '-')
514 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
515 fbcon_is_default = 0;
516 }
e4fc2761
AD		 517
518 if (!strncmp(options, "rotate:", 7)) {
519 options += 7;
520 if (*options)
521 rotate = simple_strtoul(options, &options, 0);
522 if (rotate > 3)
523 rotate = 0;
524 }
1da177e4 525 }
9b41046c 526 return 1;
1da177e4
LT		 527}
528
529__setup("fbcon=", fb_console_setup);
530#endif
531
532static int search_fb_in_map(int idx)
533{
534 int i, retval = 0;
535
e614b18d 536 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 537 if (con2fb_map[i] == idx)
538 retval = 1;
539 }
540 return retval;
541}
542
543static int search_for_mapped_con(void)
544{
545 int i, retval = 0;
546
e614b18d 547 for (i = first_fb_vc; i <= last_fb_vc; i++) {
1da177e4
LT		 548 if (con2fb_map[i] != -1)
549 retval = 1;
550 }
551 return retval;
552}
553
554static int fbcon_takeover(int show_logo)
555{
556 int err, i;
557
558 if (!num_registered_fb)
559 return -ENODEV;
560
561 if (!show_logo)
562 logo_shown = FBCON_LOGO_DONTSHOW;
563
564 for (i = first_fb_vc; i <= last_fb_vc; i++)
565 con2fb_map[i] = info_idx;
566
567 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
568 fbcon_is_default);
e614b18d 569
1da177e4
LT		 570 if (err) {
571 for (i = first_fb_vc; i <= last_fb_vc; i++) {
572 con2fb_map[i] = -1;
573 }
574 info_idx = -1;
575 }
576
577 return err;
578}
579
580static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
581 int cols, int rows, int new_cols, int new_rows)
582{
583 /* Need to make room for the logo */
9c44e5f6 584 struct fbcon_ops *ops = info->fbcon_par;
1da177e4
LT		 585 int cnt, erase = vc->vc_video_erase_char, step;
586 unsigned short *save = NULL, *r, *q;
587
588 /*
589 * remove underline attribute from erase character
590 * if black and white framebuffer.
591 */
b8c90945 592 if (fb_get_color_depth(&info->var, &info->fix) == 1)
1da177e4 593 erase &= ~0x400;
9c44e5f6 594 logo_height = fb_prepare_logo(info, ops->rotate);
1da177e4
LT		 595 logo_lines = (logo_height + vc->vc_font.height - 1) /
596 vc->vc_font.height;
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
605 if (save) {
606 int i = cols < new_cols ? cols : new_cols;
607 scr_memsetw(save, erase, logo_lines * new_cols * 2);
608 r = q - step;
609 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
610 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
611 r = q;
612 }
613 }
614 if (r == q) {
615 /* We can scroll screen down */
616 r = q - step - cols;
617 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
618 scr_memcpyw(r + step, r, vc->vc_size_row);
619 r -= cols;
620 }
621 if (!save) {
622 vc->vc_y += logo_lines;
623 vc->vc_pos += logo_lines * vc->vc_size_row;
624 }
625 }
626 scr_memsetw((unsigned short *) vc->vc_origin,
627 erase,
628 vc->vc_size_row * logo_lines);
629
630 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
631 fbcon_clear_margins(vc, 0);
632 update_screen(vc);
633 }
634
635 if (save) {
636 q = (unsigned short *) (vc->vc_origin +
637 vc->vc_size_row *
638 rows);
639 scr_memcpyw(q, save, logo_lines * new_cols * 2);
640 vc->vc_y += logo_lines;
641 vc->vc_pos += logo_lines * vc->vc_size_row;
642 kfree(save);
643 }
644
645 if (logo_lines > vc->vc_bottom) {
646 logo_shown = FBCON_LOGO_CANSHOW;
647 printk(KERN_INFO
648 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
649 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
650 logo_shown = FBCON_LOGO_DRAW;
651 vc->vc_top = logo_lines;
652 }
653}
654
655#ifdef CONFIG_FB_TILEBLITTING
b73deed3 656static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 657{
658 struct fbcon_ops *ops = info->fbcon_par;
659
b73deed3 660 ops->p = &fb_display[vc->vc_num];
ab767201 661
1da177e4 662 if ((info->flags & FBINFO_MISC_TILEBLITTING))
b73deed3 663 fbcon_set_tileops(vc, info);
e4fc2761 664 else {
b73deed3 665 fbcon_set_rotation(info);
1da177e4 666 fbcon_set_bitops(ops);
e4fc2761 667 }
1da177e4
LT		 668}
669#else
b73deed3 670static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
1da177e4
LT		 671{
672 struct fbcon_ops *ops = info->fbcon_par;
673
674 info->flags &= ~FBINFO_MISC_TILEBLITTING;
b73deed3
AD		 675 ops->p = &fb_display[vc->vc_num];
676 fbcon_set_rotation(info);
1da177e4
LT		 677 fbcon_set_bitops(ops);
678}
679#endif /* CONFIG_MISC_TILEBLITTING */
680
681
682static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
683 int unit, int oldidx)
684{
685 struct fbcon_ops *ops = NULL;
686 int err = 0;
687
688 if (!try_module_get(info->fbops->owner))
689 err = -ENODEV;
690
691 if (!err && info->fbops->fb_open &&
692 info->fbops->fb_open(info, 0))
693 err = -ENODEV;
694
695 if (!err) {
a39bc34e 696 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 697 if (!ops)
698 err = -ENOMEM;
699 }
700
701 if (!err) {
1da177e4 702 info->fbcon_par = ops;
b73deed3 703 set_blitting_type(vc, info);
1da177e4
LT		 704 }
705
706 if (err) {
707 con2fb_map[unit] = oldidx;
708 module_put(info->fbops->owner);
709 }
710
711 return err;
712}
713
714static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
715 struct fb_info *newinfo, int unit,
716 int oldidx, int found)
717{
718 struct fbcon_ops *ops = oldinfo->fbcon_par;
719 int err = 0;
720
721 if (oldinfo->fbops->fb_release &&
722 oldinfo->fbops->fb_release(oldinfo, 0)) {
723 con2fb_map[unit] = oldidx;
724 if (!found && newinfo->fbops->fb_release)
725 newinfo->fbops->fb_release(newinfo, 0);
726 if (!found)
727 module_put(newinfo->fbops->owner);
728 err = -ENODEV;
729 }
730
731 if (!err) {
88fb2c6e 732 fbcon_del_cursor_timer(oldinfo);
1da177e4
LT		 733 kfree(ops->cursor_state.mask);
734 kfree(ops->cursor_data);
e4fc2761 735 kfree(ops->fontbuffer);
1da177e4
LT		 736 kfree(oldinfo->fbcon_par);
737 oldinfo->fbcon_par = NULL;
738 module_put(oldinfo->fbops->owner);
dd0314f7
AD		 739 /*
740 If oldinfo and newinfo are driving the same hardware,
741 the fb_release() method of oldinfo may attempt to
742 restore the hardware state. This will leave the
743 newinfo in an undefined state. Thus, a call to
744 fb_set_par() may be needed for the newinfo.
745 */
746 if (newinfo->fbops->fb_set_par)
747 newinfo->fbops->fb_set_par(newinfo);
1da177e4
LT		 748 }
749
750 return err;
751}
752
1da177e4
LT		 753static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
754 int unit, int show_logo)
755{
756 struct fbcon_ops *ops = info->fbcon_par;
757
758 ops->currcon = fg_console;
759
760 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
761 info->fbops->fb_set_par(info);
762
763 ops->flags |= FBCON_FLAGS_INIT;
764 ops->graphics = 0;
765
766 if (vc)
767 fbcon_set_disp(info, &info->var, vc);
768 else
769 fbcon_preset_disp(info, &info->var, unit);
770
771 if (show_logo) {
772 struct vc_data *fg_vc = vc_cons[fg_console].d;
773 struct fb_info *fg_info =
774 registered_fb[con2fb_map[fg_console]];
775
776 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
777 fg_vc->vc_rows, fg_vc->vc_cols,
778 fg_vc->vc_rows);
779 }
780
781 update_screen(vc_cons[fg_console].d);
782}
783
784/**
785 * set_con2fb_map - map console to frame buffer device
786 * @unit: virtual console number to map
787 * @newidx: frame buffer index to map virtual console to
788 * @user: user request
789 *
790 * Maps a virtual console @unit to a frame buffer device
791 * @newidx.
792 */
793static int set_con2fb_map(int unit, int newidx, int user)
794{
795 struct vc_data *vc = vc_cons[unit].d;
796 int oldidx = con2fb_map[unit];
797 struct fb_info *info = registered_fb[newidx];
798 struct fb_info *oldinfo = NULL;
799 int found, err = 0;
800
801 if (oldidx == newidx)
802 return 0;
803
e614b18d
AD		 804 if (!info || fbcon_has_exited)
805 return -EINVAL;
1da177e4
LT		 806
807 if (!err && !search_for_mapped_con()) {
808 info_idx = newidx;
809 return fbcon_takeover(0);
810 }
811
812 if (oldidx != -1)
813 oldinfo = registered_fb[oldidx];
814
815 found = search_fb_in_map(newidx);
816
817 acquire_console_sem();
818 con2fb_map[unit] = newidx;
819 if (!err && !found)
820 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
821
822
823 /*
824 * If old fb is not mapped to any of the consoles,
825 * fbcon should release it.
826 */
827 if (!err && oldinfo && !search_fb_in_map(oldidx))
828 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
829 found);
830
831 if (!err) {
832 int show_logo = (fg_console == 0 && !user &&
833 logo_shown != FBCON_LOGO_DONTSHOW);
834
835 if (!found)
88fb2c6e 836 fbcon_add_cursor_timer(info);
1da177e4
LT		 837 con2fb_map_boot[unit] = newidx;
838 con2fb_init_display(vc, info, unit, show_logo);
839 }
840
e614b18d
AD		 841 if (!search_fb_in_map(info_idx))
842 info_idx = newidx;
843
1da177e4
LT		 844 release_console_sem();
845 return err;
846}
847
848/*
849 * Low Level Operations
850 */
851/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
852static int var_to_display(struct display *disp,
853 struct fb_var_screeninfo *var,
854 struct fb_info *info)
855{
856 disp->xres_virtual = var->xres_virtual;
857 disp->yres_virtual = var->yres_virtual;
858 disp->bits_per_pixel = var->bits_per_pixel;
859 disp->grayscale = var->grayscale;
860 disp->nonstd = var->nonstd;
861 disp->accel_flags = var->accel_flags;
862 disp->height = var->height;
863 disp->width = var->width;
864 disp->red = var->red;
865 disp->green = var->green;
866 disp->blue = var->blue;
867 disp->transp = var->transp;
868 disp->rotate = var->rotate;
869 disp->mode = fb_match_mode(var, &info->modelist);
870 if (disp->mode == NULL)
871 /* This should not happen */
872 return -EINVAL;
873 return 0;
874}
875
876static void display_to_var(struct fb_var_screeninfo *var,
877 struct display *disp)
878{
879 fb_videomode_to_var(var, disp->mode);
880 var->xres_virtual = disp->xres_virtual;
881 var->yres_virtual = disp->yres_virtual;
882 var->bits_per_pixel = disp->bits_per_pixel;
883 var->grayscale = disp->grayscale;
884 var->nonstd = disp->nonstd;
885 var->accel_flags = disp->accel_flags;
886 var->height = disp->height;
887 var->width = disp->width;
888 var->red = disp->red;
889 var->green = disp->green;
890 var->blue = disp->blue;
891 var->transp = disp->transp;
892 var->rotate = disp->rotate;
893}
894
895static const char *fbcon_startup(void)
896{
897 const char *display_desc = "frame buffer device";
898 struct display *p = &fb_display[fg_console];
899 struct vc_data *vc = vc_cons[fg_console].d;
2f4516db 900 const struct font_desc *font = NULL;
1da177e4
LT		 901 struct module *owner;
902 struct fb_info *info = NULL;
903 struct fbcon_ops *ops;
904 int rows, cols;
905 int irqres;
906
907 irqres = 1;
908 /*
909 * If num_registered_fb is zero, this is a call for the dummy part.
910 * The frame buffer devices weren't initialized yet.
911 */
912 if (!num_registered_fb || info_idx == -1)
913 return display_desc;
914 /*
915 * Instead of blindly using registered_fb[0], we use info_idx, set by
916 * fb_console_init();
917 */
918 info = registered_fb[info_idx];
919 if (!info)
920 return NULL;
921
922 owner = info->fbops->owner;
923 if (!try_module_get(owner))
924 return NULL;
925 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
926 module_put(owner);
927 return NULL;
928 }
929
a39bc34e 930 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1da177e4
LT		 931 if (!ops) {
932 module_put(owner);
933 return NULL;
934 }
935
1da177e4
LT		 936 ops->currcon = -1;
937 ops->graphics = 1;
e4fc2761 938 ops->cur_rotate = -1;
1da177e4 939 info->fbcon_par = ops;
e4fc2761 940 p->con_rotate = rotate;
b73deed3 941 set_blitting_type(vc, info);
1da177e4
LT		 942
943 if (info->fix.type != FB_TYPE_TEXT) {
944 if (fbcon_softback_size) {
945 if (!softback_buf) {
946 softback_buf =
947 (unsigned long)
948 kmalloc(fbcon_softback_size,
949 GFP_KERNEL);
950 if (!softback_buf) {
951 fbcon_softback_size = 0;
952 softback_top = 0;
953 }
954 }
955 } else {
956 if (softback_buf) {
957 kfree((void *) softback_buf);
958 softback_buf = 0;
959 softback_top = 0;
960 }
961 }
962 if (softback_buf)
963 softback_in = softback_top = softback_curr =
964 softback_buf;
965 softback_lines = 0;
966 }
967
968 /* Setup default font */
969 if (!p->fontdata) {
970 if (!fontname[0] || !(font = find_font(fontname)))
971 font = get_default_font(info->var.xres,
972 info->var.yres);
973 vc->vc_font.width = font->width;
974 vc->vc_font.height = font->height;
2f4516db 975 vc->vc_font.data = (void *)(p->fontdata = font->data);
1da177e4
LT		 976 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
977 }
978
e4fc2761
AD		 979 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
980 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
981 cols /= vc->vc_font.width;
982 rows /= vc->vc_font.height;
1da177e4
LT		 983 vc_resize(vc, cols, rows);
984
985 DPRINTK("mode: %s\n", info->fix.id);
986 DPRINTK("visual: %d\n", info->fix.visual);
987 DPRINTK("res: %dx%d-%d\n", info->var.xres,
988 info->var.yres,
989 info->var.bits_per_pixel);
990
991#ifdef CONFIG_ATARI
992 if (MACH_IS_ATARI) {
993 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
994 irqres =
995 request_irq(IRQ_AUTO_4, fb_vbl_handler,
996 IRQ_TYPE_PRIO, "framebuffer vbl",
997 info);
998 }
999#endif /* CONFIG_ATARI */
1000
1001#ifdef CONFIG_MAC
1002 /*
1003 * On a Macintoy, the VBL interrupt may or may not be active.
1004 * As interrupt based cursor is more reliable and race free, we
1005 * probe for VBL interrupts.
1006 */
1007 if (MACH_IS_MAC) {
1008 int ct = 0;
1009 /*
1010 * Probe for VBL: set temp. handler ...
1011 */
1012 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1013 "framebuffer vbl", info);
1014 vbl_detected = 0;
1015
1016 /*
1017 * ... and spin for 20 ms ...
1018 */
1019 while (!vbl_detected && ++ct < 1000)
1020 udelay(20);
1021
1022 if (ct == 1000)
1023 printk
1024 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1025
1026 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1027
1028 if (vbl_detected) {
1029 /*
1030 * interrupt based cursor ok
1031 */
1032 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1033 irqres =
1034 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1035 "framebuffer vbl", info);
1036 } else {
1037 /*
1038 * VBL not detected: fall through, use timer based cursor
1039 */
1040 irqres = 1;
1041 }
1042 }
1043#endif /* CONFIG_MAC */
1044
88fb2c6e 1045 fbcon_add_cursor_timer(info);
e614b18d 1046 fbcon_has_exited = 0;
1da177e4
LT		 1047 return display_desc;
1048}
1049
1050static void fbcon_init(struct vc_data *vc, int init)
1051{
1052 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1053 struct fbcon_ops *ops;
1054 struct vc_data **default_mode = vc->vc_display_fg;
1055 struct vc_data *svc = *default_mode;
1056 struct display *t, *p = &fb_display[vc->vc_num];
1057 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
306958e8 1058 int cap;
1da177e4
LT		 1059
1060 if (info_idx == -1 || info == NULL)
1061 return;
306958e8
AB		 1062
1063 cap = info->flags;
1064
1da177e4
LT		 1065 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1066 (info->fix.type == FB_TYPE_TEXT))
1067 logo = 0;
1068
1da177e4
LT		 1069 if (var_to_display(p, &info->var, info))
1070 return;
1071
1072 /* If we are not the first console on this
1073 fb, copy the font from that console */
e614b18d
AD		 1074 t = &fb_display[fg_console];
1075 if (!p->fontdata) {
1076 if (t->fontdata) {
1077 struct vc_data *fvc = vc_cons[fg_console].d;
1078
1079 vc->vc_font.data = (void *)(p->fontdata =
1080 fvc->vc_font.data);
1081 vc->vc_font.width = fvc->vc_font.width;
1082 vc->vc_font.height = fvc->vc_font.height;
1083 p->userfont = t->userfont;
1084
1085 if (p->userfont)
1086 REFCOUNT(p->fontdata)++;
1087 } else {
1088 const struct font_desc *font = NULL;
1089
1090 if (!fontname[0] || !(font = find_font(fontname)))
1091 font = get_default_font(info->var.xres,
1092 info->var.yres);
1093 vc->vc_font.width = font->width;
1094 vc->vc_font.height = font->height;
1095 vc->vc_font.data = (void *)(p->fontdata = font->data);
1096 vc->vc_font.charcount = 256; /* FIXME Need to
1097 support more fonts */
1098 }
1da177e4 1099 }
e614b18d 1100
1da177e4
LT		 1101 if (p->userfont)
1102 charcnt = FNTCHARCNT(p->fontdata);
e614b18d 1103
b8c90945 1104 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1da177e4
LT		 1105 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1106 if (charcnt == 256) {
1107 vc->vc_hi_font_mask = 0;
1108 } else {
1109 vc->vc_hi_font_mask = 0x100;
1110 if (vc->vc_can_do_color)
1111 vc->vc_complement_mask <<= 1;
1112 }
1113
1114 if (!*svc->vc_uni_pagedir_loc)
1115 con_set_default_unimap(svc);
1116 if (!*vc->vc_uni_pagedir_loc)
1117 con_copy_unimap(vc, svc);
1118
e4fc2761
AD		 1119 ops = info->fbcon_par;
1120 p->con_rotate = rotate;
b73deed3 1121 set_blitting_type(vc, info);
e4fc2761 1122
1da177e4
LT		 1123 cols = vc->vc_cols;
1124 rows = vc->vc_rows;
e4fc2761
AD		 1125 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1126 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1127 new_cols /= vc->vc_font.width;
1128 new_rows /= vc->vc_font.height;
1da177e4
LT		 1129 vc_resize(vc, new_cols, new_rows);
1130
1da177e4
LT		 1131 /*
1132 * We must always set the mode. The mode of the previous console
1133 * driver could be in the same resolution but we are using different
1134 * hardware so we have to initialize the hardware.
1135 *
1136 * We need to do it in fbcon_init() to prevent screen corruption.
1137 */