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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / video / console / fbcon.c
blob2fba5cfcbcee66c3b53a13872970545c32ae1f7d
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/config.h>
62 #include <linux/module.h>
63 #include <linux/types.h>
64 #include <linux/sched.h>
65 #include <linux/fs.h>
66 #include <linux/kernel.h>
67 #include <linux/delay.h> /* MSch: for IRQ probe */
68 #include <linux/tty.h>
69 #include <linux/console.h>
70 #include <linux/string.h>
71 #include <linux/kd.h>
72 #include <linux/slab.h>
73 #include <linux/fb.h>
74 #include <linux/vt_kern.h>
75 #include <linux/selection.h>
76 #include <linux/font.h>
77 #include <linux/smp.h>
78 #include <linux/init.h>
79 #include <linux/interrupt.h>
80
81 #include <asm/irq.h>
82 #include <asm/system.h>
83 #include <asm/uaccess.h>
84 #ifdef CONFIG_ATARI
85 #include <asm/atariints.h>
86 #endif
87 #ifdef CONFIG_MAC
88 #include <asm/macints.h>
89 #endif
90 #if defined(__mc68000__) || defined(CONFIG_APUS)
91 #include <asm/machdep.h>
92 #include <asm/setup.h>
93 #endif
94
95 #include "fbcon.h"
96
97 #ifdef FBCONDEBUG
98 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
99 #else
100 # define DPRINTK(fmt, args...)
101 #endif
102
103 struct display fb_display[MAX_NR_CONSOLES];
104 signed char con2fb_map[MAX_NR_CONSOLES];
105 static int logo_height;
106 static int logo_lines;
107 static int logo_shown = -1;
108 /* Software scrollback */
109 int fbcon_softback_size = 32768;
110 static unsigned long softback_buf, softback_curr;
111 static unsigned long softback_in;
112 static unsigned long softback_top, softback_end;
113 static int softback_lines;
114 /* console mappings */
115 static int first_fb_vc;
116 static int last_fb_vc = MAX_NR_CONSOLES - 1;
117 static int fbcon_is_default = 1;
118 /* font data */
119 static char fontname[40];
120
121 /* current fb_info */
122 static int info_idx = -1;
123
124 #define REFCOUNT(fd) (((int *)(fd))[-1])
125 #define FNTSIZE(fd) (((int *)(fd))[-2])
126 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
127 #define FNTSUM(fd) (((int *)(fd))[-4])
128 #define FONT_EXTRA_WORDS 4
129
130 #define CM_SOFTBACK (8)
131
132 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
133
134 static void fbcon_free_font(struct display *);
135 static int fbcon_set_origin(struct vc_data *);
136
137 #define CURSOR_DRAW_DELAY (1)
138
139 /* # VBL ints between cursor state changes */
140 #define ARM_CURSOR_BLINK_RATE (10)
141 #define ATARI_CURSOR_BLINK_RATE (42)
142 #define MAC_CURSOR_BLINK_RATE (32)
143 #define DEFAULT_CURSOR_BLINK_RATE (20)
144
145 static int vbl_cursor_cnt;
146
147 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
148
149 /*
150 * Interface used by the world
151 */
152
153 static const char *fbcon_startup(void);
154 static void fbcon_init(struct vc_data *vc, int init);
155 static void fbcon_deinit(struct vc_data *vc);
156 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
157 int width);
158 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
159 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
160 int count, int ypos, int xpos);
161 static void fbcon_cursor(struct vc_data *vc, int mode);
162 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
163 int count);
164 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
165 int height, int width);
166 static int fbcon_switch(struct vc_data *vc);
167 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
168 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
169 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
170 void accel_clear_margins(struct vc_data *vc, struct fb_info *info,
171 int bottom_only);
172
173
174 /*
175 * Internal routines
176 */
177 static __inline__ int real_y(struct display *p, int ypos);
178 static __inline__ void ywrap_up(struct vc_data *vc, int count);
179 static __inline__ void ywrap_down(struct vc_data *vc, int count);
180 static __inline__ void ypan_up(struct vc_data *vc, int count);
181 static __inline__ void ypan_down(struct vc_data *vc, int count);
182 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
183 int dy, int dx, int height, int width, u_int y_break);
184 static void fbcon_set_disp(struct fb_info *info, struct vc_data *vc);
185 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
186 int line, int count, int dy);
187
188 #ifdef CONFIG_MAC
189 /*
190 * On the Macintoy, there may or may not be a working VBL int. We need to probe
191 */
192 static int vbl_detected;
193
194 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
195 {
196 vbl_detected++;
197 return IRQ_HANDLED;
198 }
199 #endif
200
201 static void fb_flashcursor(void *private)
202 {
203 struct fb_info *info = (struct fb_info *) private;
204 struct vc_data *vc = NULL;
205
206 if (info->currcon != -1)
207 vc = vc_cons[info->currcon].d;
208
209 if (info->state != FBINFO_STATE_RUNNING ||
210 info->cursor.rop == ROP_COPY || !vc || !CON_IS_VISIBLE(vc)
211 || registered_fb[(int) con2fb_map[vc->vc_num]] != info)
212 return;
213 acquire_console_sem();
214 info->cursor.enable ^= 1;
215 info->fbops->fb_cursor(info, &info->cursor);
216 release_console_sem();
217 }
218
219 #if (defined(__arm__) && defined(IRQ_VSYNCPULSE)) || defined(CONFIG_ATARI) || defined(CONFIG_MAC)
220 static int cursor_blink_rate;
221 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
222 {
223 struct fb_info *info = dev_id;
224
225 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
226 schedule_work(&info->queue);
227 vbl_cursor_cnt = cursor_blink_rate;
228 }
229 return IRQ_HANDLED;
230 }
231 #endif
232
233 static void cursor_timer_handler(unsigned long dev_addr)
234 {
235 struct fb_info *info = (struct fb_info *) dev_addr;
236
237 schedule_work(&info->queue);
238 mod_timer(&info->cursor_timer, jiffies + HZ/5);
239 }
240
241 int __init fb_console_setup(char *this_opt)
242 {
243 char *options;
244 int i, j;
245
246 if (!this_opt || !*this_opt)
247 return 0;
248
249 while ((options = strsep(&this_opt, ",")) != NULL) {
250 if (!strncmp(options, "font:", 5))
251 strcpy(fontname, options + 5);
252
253 if (!strncmp(options, "scrollback:", 11)) {
254 options += 11;
255 if (*options) {
256 fbcon_softback_size = simple_strtoul(options, &options, 0);
257 if (*options == 'k' || *options == 'K') {
258 fbcon_softback_size *= 1024;
259 options++;
260 }
261 if (*options != ',')
262 return 0;
263 options++;
264 } else
265 return 0;
266 }
267
268 if (!strncmp(options, "map:", 4)) {
269 options += 4;
270 if (*options)
271 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
272 if (!options[j])
273 j = 0;
274 con2fb_map[i] = (options[j++]-'0') % FB_MAX;
275 }
276 return 0;
277 }
278
279 if (!strncmp(options, "vc:", 3)) {
280 options += 3;
281 if (*options)
282 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
283 if (first_fb_vc < 0)
284 first_fb_vc = 0;
285 if (*options++ == '-')
286 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
287 fbcon_is_default = 0;
288 }
289 }
290 return 0;
291 }
292
293 __setup("fbcon=", fb_console_setup);
294
295 static int search_fb_in_map(int idx)
296 {
297 int i;
298
299 for (i = 0; i < MAX_NR_CONSOLES; i++) {
300 if (con2fb_map[i] == idx)
301 return 1;
302 }
303 return 0;
304 }
305
306 static int search_for_mapped_con(void)
307 {
308 int i;
309
310 for (i = 0; i < MAX_NR_CONSOLES; i++) {
311 if (con2fb_map[i] != -1)
312 return 1;
313 }
314 return 0;
315 }
316
317 static int fbcon_takeover(void)
318 {
319 int err, i;
320
321 if (!num_registered_fb)
322 return -ENODEV;
323
324 for (i = first_fb_vc; i <= last_fb_vc; i++)
325 con2fb_map[i] = info_idx;
326
327 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
328 fbcon_is_default);
329 if (err) {
330 for (i = first_fb_vc; i <= last_fb_vc; i++) {
331 con2fb_map[i] = -1;
332 }
333 info_idx = -1;
334 }
335
336 return err;
337 }
338
339 /**
340 * set_con2fb_map - map console to frame buffer device
341 * @unit: virtual console number to map
342 * @newidx: frame buffer index to map virtual console to
343 *
344 * Maps a virtual console @unit to a frame buffer device
345 * @newidx.
346 */
347 static int set_con2fb_map(int unit, int newidx)
348 {
349 struct vc_data *vc = vc_cons[unit].d;
350 int oldidx = con2fb_map[unit];
351 struct fb_info *info = registered_fb[newidx];
352 struct fb_info *oldinfo = NULL;
353 int found;
354
355 if (oldidx == newidx)
356 return 0;
357
358 if (!vc)
359 return -ENODEV;
360
361 if (!search_for_mapped_con()) {
362 info_idx = newidx;
363 return fbcon_takeover();
364 }
365
366 if (oldidx != -1)
367 oldinfo = registered_fb[oldidx];
368
369 found = search_fb_in_map(newidx);
370
371 acquire_console_sem();
372 con2fb_map[unit] = newidx;
373 if (!found) {
374 if (!try_module_get(info->fbops->owner)) {
375 con2fb_map[unit] = oldidx;
376 release_console_sem();
377 return -ENODEV;
378 }
379 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
380 module_put(info->fbops->owner);
381 con2fb_map[unit] = oldidx;
382 release_console_sem();
383 return -ENODEV;
384 }
385 }
386
387 /*
388 * If old fb is not mapped to any of the consoles,
389 * fbcon should release it.
390 */
391 if (oldinfo && !search_fb_in_map(oldidx)) {
392 if (oldinfo->fbops->fb_release &&
393 oldinfo->fbops->fb_release(oldinfo, 0)) {
394 con2fb_map[unit] = oldidx;
395 if (!found && info->fbops->fb_release)
396 info->fbops->fb_release(info, 0);
397 if (!found)
398 module_put(info->fbops->owner);
399 release_console_sem();
400 return -ENODEV;
401 }
402 if (oldinfo->queue.func == fb_flashcursor)
403 del_timer_sync(&oldinfo->cursor_timer);
404 module_put(oldinfo->fbops->owner);
405 }
406 info->currcon = -1;
407 if (!found) {
408 if (!info->queue.func || info->queue.func == fb_flashcursor) {
409 if (!info->queue.func)
410 INIT_WORK(&info->queue, fb_flashcursor, info);
411
412 init_timer(&info->cursor_timer);
413 info->cursor_timer.function = cursor_timer_handler;
414 info->cursor_timer.expires = jiffies + HZ / 5;
415 info->cursor_timer.data = (unsigned long ) info;
416 add_timer(&info->cursor_timer);
417 }
418 }
419 if (info->fbops->fb_set_par)
420 info->fbops->fb_set_par(info);
421 fbcon_set_disp(info, vc);
422 release_console_sem();
423 return 0;
424 }
425
426 /*
427 * Accelerated handlers.
428 */
429 static inline int get_color(struct vc_data *vc, struct fb_info *info,
430 u16 c, int is_fg)
431 {
432 int depth = fb_get_color_depth(info);
433 int color = 0;
434
435 if (depth != 1)
436 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
437 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
438
439 switch (depth) {
440 case 1:
441 {
442 /* 0 or 1 */
443 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? 1 : 0;
444 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : 1;
445
446 color = (is_fg) ? fg : bg;
447 break;
448 }
449 case 2:
450 /*
451 * Scale down 16-colors to 4 colors. Default 4-color palette
452 * is grayscale.
453 */
454 color /= 4;
455 break;
456 case 3:
457 /*
458 * Last 8 entries of default 16-color palette is a more intense
459 * version of the first 8 (i.e., same chrominance, different
460 * luminance).
461 */
462 color &= 7;
463 break;
464 }
465
466 return color;
467 }
468
469 #define FBCON_ATTRIBUTE_UNDERLINE 1
470 #define FBCON_ATTRIBUTE_REVERSE 2
471 #define FBCON_ATTRIBUTE_BOLD 4
472
473 static inline int get_attribute(struct fb_info *info, u16 c)
474 {
475 int attribute = 0;
476
477 if (fb_get_color_depth(info) == 1) {
478 if (attr_underline(c))
479 attribute |= FBCON_ATTRIBUTE_UNDERLINE;
480 if (attr_reverse(c))
481 attribute |= FBCON_ATTRIBUTE_REVERSE;
482 if (attr_bold(c))
483 attribute |= FBCON_ATTRIBUTE_BOLD;
484 }
485
486 return attribute;
487 }
488
489 static inline void update_attr(u8 *dst, u8 *src, int attribute,
490 struct vc_data *vc)
491 {
492 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
493 int width = (vc->vc_font.width + 7) >> 3;
494 unsigned int cellsize = vc->vc_font.height * width;
495 u8 c;
496
497 offset = cellsize - (offset * width);
498 for (i = 0; i < cellsize; i++) {
499 c = src[i];
500 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
501 c = 0xff;
502 if (attribute & FBCON_ATTRIBUTE_BOLD)
503 c |= c >> 1;
504 if (attribute & FBCON_ATTRIBUTE_REVERSE)
505 c = ~c;
506 dst[i] = c;
507 }
508 }
509
510 void accel_bmove(struct vc_data *vc, struct fb_info *info, int sy,
511 int sx, int dy, int dx, int height, int width)
512 {
513 struct fb_copyarea area;
514
515 area.sx = sx * vc->vc_font.width;
516 area.sy = sy * vc->vc_font.height;
517 area.dx = dx * vc->vc_font.width;
518 area.dy = dy * vc->vc_font.height;
519 area.height = height * vc->vc_font.height;
520 area.width = width * vc->vc_font.width;
521
522 info->fbops->fb_copyarea(info, &area);
523 }
524
525 void accel_clear(struct vc_data *vc, struct fb_info *info, int sy,
526 int sx, int height, int width)
527 {
528 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
529 struct fb_fillrect region;
530
531 region.color = attr_bgcol_ec(bgshift, vc);
532 region.dx = sx * vc->vc_font.width;
533 region.dy = sy * vc->vc_font.height;
534 region.width = width * vc->vc_font.width;
535 region.height = height * vc->vc_font.height;
536 region.rop = ROP_COPY;
537
538 info->fbops->fb_fillrect(info, &region);
539 }
540
541 void accel_putcs(struct vc_data *vc, struct fb_info *info,
542 const unsigned short *s, int count, int yy, int xx)
543 {
544 void (*move_unaligned)(struct fb_info *info, struct fb_pixmap *buf,
545 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
546 u32 height, u32 shift_high, u32 shift_low,
547 u32 mod);
548 void (*move_aligned)(struct fb_info *info, struct fb_pixmap *buf,
549 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
550 u32 height);
551 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
552 unsigned int width = (vc->vc_font.width + 7) >> 3;
553 unsigned int cellsize = vc->vc_font.height * width;
554 unsigned int maxcnt = info->pixmap.size/cellsize;
555 unsigned int scan_align = info->pixmap.scan_align - 1;
556 unsigned int buf_align = info->pixmap.buf_align - 1;
557 unsigned int shift_low = 0, mod = vc->vc_font.width % 8;
558 unsigned int shift_high = 8, pitch, cnt, size, k;
559 unsigned int idx = vc->vc_font.width >> 3;
560 unsigned int attribute = get_attribute(info, scr_readw(s));
561 struct fb_image image;
562 u8 *src, *dst, *buf = NULL;
563
564 if (attribute) {
565 buf = kmalloc(cellsize, GFP_KERNEL);
566 if (!buf)
567 return;
568 }
569
570 image.fg_color = get_color(vc, info, scr_readw(s), 1);
571 image.bg_color = get_color(vc, info, scr_readw(s), 0);
572
573 image.dx = xx * vc->vc_font.width;
574 image.dy = yy * vc->vc_font.height;
575 image.height = vc->vc_font.height;
576 image.depth = 1;
577
578 if (info->pixmap.outbuf && info->pixmap.inbuf) {
579 move_aligned = fb_iomove_buf_aligned;
580 move_unaligned = fb_iomove_buf_unaligned;
581 } else {
582 move_aligned = fb_sysmove_buf_aligned;
583 move_unaligned = fb_sysmove_buf_unaligned;
584 }
585 while (count) {
586 if (count > maxcnt)
587 cnt = k = maxcnt;
588 else
589 cnt = k = count;
590
591 image.width = vc->vc_font.width * cnt;
592 pitch = ((image.width + 7) >> 3) + scan_align;
593 pitch &= ~scan_align;
594 size = pitch * image.height + buf_align;
595 size &= ~buf_align;
596 dst = fb_get_buffer_offset(info, &info->pixmap, size);
597 image.data = dst;
598 if (mod) {
599 while (k--) {
600 src = vc->vc_font.data + (scr_readw(s++)&
601 charmask)*cellsize;
602
603 if (attribute) {
604 update_attr(buf, src, attribute, vc);
605 src = buf;
606 }
607
608 move_unaligned(info, &info->pixmap, dst, pitch,
609 src, idx, image.height,
610 shift_high, shift_low, mod);
611 shift_low += mod;
612 dst += (shift_low >= 8) ? width : width - 1;
613 shift_low &= 7;
614 shift_high = 8 - shift_low;
615 }
616 } else {
617 while (k--) {
618 src = vc->vc_font.data + (scr_readw(s++)&
619 charmask)*cellsize;
620
621 if (attribute) {
622 update_attr(buf, src, attribute, vc);
623 src = buf;
624 }
625
626 move_aligned(info, &info->pixmap, dst, pitch,
627 src, idx, image.height);
628 dst += width;
629 }
630 }
631 info->fbops->fb_imageblit(info, &image);
632 image.dx += cnt * vc->vc_font.width;
633 count -= cnt;
634 }
635
636 if (buf)
637 kfree(buf);
638 }
639
640 void accel_clear_margins(struct vc_data *vc, struct fb_info *info,
641 int bottom_only)
642 {
643 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
644 unsigned int cw = vc->vc_font.width;
645 unsigned int ch = vc->vc_font.height;
646 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
647 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
648 unsigned int rs = info->var.xres - rw;
649 unsigned int bs = info->var.yres - bh;
650 struct fb_fillrect region;
651
652 region.color = attr_bgcol_ec(bgshift, vc);
653 region.rop = ROP_COPY;
654
655 if (rw && !bottom_only) {
656 region.dx = info->var.xoffset + rs;
657 region.dy = 0;
658 region.width = rw;
659 region.height = info->var.yres_virtual;
660 info->fbops->fb_fillrect(info, &region);
661 }
662
663 if (bh) {
664 region.dx = info->var.xoffset;
665 region.dy = info->var.yoffset + bs;
666 region.width = rs;
667 region.height = bh;
668 info->fbops->fb_fillrect(info, &region);
669 }
670 }
671
672 /*
673 * Low Level Operations
674 */
675 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
676 static int var_to_display(struct display *disp,
677 struct fb_var_screeninfo *var,
678 struct fb_info *info)
679 {
680 disp->xres_virtual = var->xres_virtual;
681 disp->yres_virtual = var->yres_virtual;
682 disp->bits_per_pixel = var->bits_per_pixel;
683 disp->grayscale = var->grayscale;
684 disp->nonstd = var->nonstd;
685 disp->accel_flags = var->accel_flags;
686 disp->height = var->height;
687 disp->width = var->width;
688 disp->red = var->red;
689 disp->green = var->green;
690 disp->blue = var->blue;
691 disp->transp = var->transp;
692 disp->mode = fb_match_mode(var, &info->modelist);
693 if (disp->mode == NULL)
694 /* This should not happen */
695 return -EINVAL;
696 return 0;
697 }
698
699 static void display_to_var(struct fb_var_screeninfo *var,
700 struct display *disp)
701 {
702 fb_videomode_to_var(var, disp->mode);
703 var->xres_virtual = disp->xres_virtual;
704 var->yres_virtual = disp->yres_virtual;
705 var->bits_per_pixel = disp->bits_per_pixel;
706 var->grayscale = disp->grayscale;
707 var->nonstd = disp->nonstd;
708 var->accel_flags = disp->accel_flags;
709 var->height = disp->height;
710 var->width = disp->width;
711 var->red = disp->red;
712 var->green = disp->green;
713 var->blue = disp->blue;
714 var->transp = disp->transp;
715 }
716
717 static const char *fbcon_startup(void)
718 {
719 const char *display_desc = "frame buffer device";
720 struct display *p = &fb_display[fg_console];
721 struct vc_data *vc = vc_cons[fg_console].d;
722 struct font_desc *font = NULL;
723 struct module *owner;
724 struct fb_info *info = NULL;
725 int rows, cols;
726 int irqres;
727
728 irqres = 1;
729 /*
730 * If num_registered_fb is zero, this is a call for the dummy part.
731 * The frame buffer devices weren't initialized yet.
732 */
733 if (!num_registered_fb || info_idx == -1)
734 return display_desc;
735 /*
736 * Instead of blindly using registered_fb[0], we use info_idx, set by
737 * fb_console_init();
738 */
739 info = registered_fb[info_idx];
740 if (!info)
741 return NULL;
742 info->currcon = -1;
743
744 owner = info->fbops->owner;
745 if (!try_module_get(owner))
746 return NULL;
747 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
748 module_put(owner);
749 return NULL;
750 }
751 if (info->fix.type != FB_TYPE_TEXT) {
752 if (fbcon_softback_size) {
753 if (!softback_buf) {
754 softback_buf =
755 (unsigned long)
756 kmalloc(fbcon_softback_size,
757 GFP_KERNEL);
758 if (!softback_buf) {
759 fbcon_softback_size = 0;
760 softback_top = 0;
761 }
762 }
763 } else {
764 if (softback_buf) {
765 kfree((void *) softback_buf);
766 softback_buf = 0;
767 softback_top = 0;
768 }
769 }
770 if (softback_buf)
771 softback_in = softback_top = softback_curr =
772 softback_buf;
773 softback_lines = 0;
774 }
775
776 /* Setup default font */
777 if (!p->fontdata) {
778 if (!fontname[0] || !(font = find_font(fontname)))
779 font = get_default_font(info->var.xres,
780 info->var.yres);
781 vc->vc_font.width = font->width;
782 vc->vc_font.height = font->height;
783 vc->vc_font.data = p->fontdata = font->data;
784 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
785 }
786
787 cols = info->var.xres / vc->vc_font.width;
788 rows = info->var.yres / vc->vc_font.height;
789 vc_resize(vc->vc_num, cols, rows);
790
791 DPRINTK("mode: %s\n", info->fix.id);
792 DPRINTK("visual: %d\n", info->fix.visual);
793 DPRINTK("res: %dx%d-%d\n", info->var.xres,
794 info->var.yres,
795 info->var.bits_per_pixel);
796 con_set_default_unimap(vc->vc_num);
797
798 #ifdef CONFIG_ATARI
799 if (MACH_IS_ATARI) {
800 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
801 irqres =
802 request_irq(IRQ_AUTO_4, fb_vbl_handler,
803 IRQ_TYPE_PRIO, "framebuffer vbl",
804 info);
805 }
806 #endif /* CONFIG_ATARI */
807
808 #ifdef CONFIG_MAC
809 /*
810 * On a Macintoy, the VBL interrupt may or may not be active.
811 * As interrupt based cursor is more reliable and race free, we
812 * probe for VBL interrupts.
813 */
814 if (MACH_IS_MAC) {
815 int ct = 0;
816 /*
817 * Probe for VBL: set temp. handler ...
818 */
819 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
820 "framebuffer vbl", info);
821 vbl_detected = 0;
822
823 /*
824 * ... and spin for 20 ms ...
825 */
826 while (!vbl_detected && ++ct < 1000)
827 udelay(20);
828
829 if (ct == 1000)
830 printk
831 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
832
833 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
834
835 if (vbl_detected) {
836 /*
837 * interrupt based cursor ok
838 */
839 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
840 irqres =
841 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
842 "framebuffer vbl", info);
843 } else {
844 /*
845 * VBL not detected: fall through, use timer based cursor
846 */
847 irqres = 1;
848 }
849 }
850 #endif /* CONFIG_MAC */
851
852 #if defined(__arm__) && defined(IRQ_VSYNCPULSE)
853 cursor_blink_rate = ARM_CURSOR_BLINK_RATE;
854 irqres = request_irq(IRQ_VSYNCPULSE, fb_vbl_handler, SA_SHIRQ,
855 "framebuffer vbl", info);
856 #endif
857 /* Initialize the work queue. If the driver provides its
858 * own work queue this means it will use something besides
859 * default timer to flash the cursor. */
860 if (!info->queue.func) {
861 INIT_WORK(&info->queue, fb_flashcursor, info);
862
863 init_timer(&info->cursor_timer);
864 info->cursor_timer.function = cursor_timer_handler;
865 info->cursor_timer.expires = jiffies + HZ / 5;
866 info->cursor_timer.data = (unsigned long ) info;
867 add_timer(&info->cursor_timer);
868 }
869 return display_desc;
870 }
871
872 static void fbcon_init(struct vc_data *vc, int init)
873 {
874 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
875 struct vc_data **default_mode = vc->vc_display_fg;
876 struct display *t, *p = &fb_display[vc->vc_num];
877 int display_fg = (*default_mode)->vc_num;
878 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
879 unsigned short *save = NULL, *r, *q;
880 int cap = info->flags;
881
882 if (info_idx == -1 || info == NULL)
883 return;
884 if (vc->vc_num != display_fg || (info->flags & FBINFO_MODULE) ||
885 (info->fix.type == FB_TYPE_TEXT))
886 logo = 0;
887
888 info->var.xoffset = info->var.yoffset = p->yscroll = 0; /* reset wrap/pan */
889
890 if (var_to_display(p, &info->var, info))
891 return;
892
893 /* If we are not the first console on this
894 fb, copy the font from that console */
895 t = &fb_display[display_fg];
896 if (!vc->vc_font.data) {
897 vc->vc_font.data = p->fontdata = t->fontdata;
898 vc->vc_font.width = (*default_mode)->vc_font.width;
899 vc->vc_font.height = (*default_mode)->vc_font.height;
900 p->userfont = t->userfont;
901 if (p->userfont)
902 REFCOUNT(p->fontdata)++;
903 con_copy_unimap(vc->vc_num, display_fg);
904 }
905 if (p->userfont)
906 charcnt = FNTCHARCNT(p->fontdata);
907 vc->vc_can_do_color = (fb_get_color_depth(info) != 1);
908 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
909 if (charcnt == 256) {
910 vc->vc_hi_font_mask = 0;
911 } else {
912 vc->vc_hi_font_mask = 0x100;
913 if (vc->vc_can_do_color)
914 vc->vc_complement_mask <<= 1;
915 }
916 cols = vc->vc_cols;
917 rows = vc->vc_rows;
918 new_cols = info->var.xres / vc->vc_font.width;
919 new_rows = info->var.yres / vc->vc_font.height;
920 vc_resize(vc->vc_num, new_cols, new_rows);
921 /*
922 * We must always set the mode. The mode of the previous console
923 * driver could be in the same resolution but we are using different
924 * hardware so we have to initialize the hardware.
925 *
926 * We need to do it in fbcon_init() to prevent screen corruption.
927 */
928 if (CON_IS_VISIBLE(vc) && info->fbops->fb_set_par)
929 info->fbops->fb_set_par(info);
930
931
932 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
933 !(cap & FBINFO_HWACCEL_DISABLED))
934 p->scrollmode = SCROLL_MOVE;
935 else /* default to something safe */
936 p->scrollmode = SCROLL_REDRAW;
937
938 /*
939 * ++guenther: console.c:vc_allocate() relies on initializing
940 * vc_{cols,rows}, but we must not set those if we are only
941 * resizing the console.
942 */
943 if (!init) {
944 vc->vc_cols = new_cols;
945 vc->vc_rows = new_rows;
946 }
947
948 if (logo) {
949 /* Need to make room for the logo */
950 int cnt, erase = vc->vc_video_erase_char;
951 int step;
952
953 /*
954 * remove underline attribute from erase character
955 * if black and white framebuffer.
956 */
957 if (fb_get_color_depth(info) == 1)
958 erase &= ~0x400;
959 logo_height = fb_prepare_logo(info);
960 logo_lines = (logo_height + vc->vc_font.height - 1) /
961 vc->vc_font.height;
962 q = (unsigned short *) (vc->vc_origin +
963 vc->vc_size_row * rows);
964 step = logo_lines * cols;
965 for (r = q - logo_lines * cols; r < q; r++)
966 if (scr_readw(r) != vc->vc_video_erase_char)
967 break;
968 if (r != q && new_rows >= rows + logo_lines) {
969 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
970 if (save) {
971 int i = cols < new_cols ? cols : new_cols;
972 scr_memsetw(save, erase, logo_lines * new_cols * 2);
973 r = q - step;
974 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
975 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
976 r = q;
977 }
978 }
979 if (r == q) {
980 /* We can scroll screen down */
981 r = q - step - cols;
982 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
983 scr_memcpyw(r + step, r, vc->vc_size_row);
984 r -= cols;
985 }
986 if (!save) {
987 vc->vc_y += logo_lines;
988 vc->vc_pos += logo_lines * vc->vc_size_row;
989 }
990 }
991 scr_memsetw((unsigned short *) vc->vc_origin,
992 erase,
993 vc->vc_size_row * logo_lines);
994
995 if (CON_IS_VISIBLE(vc) && vt_cons[vc->vc_num]->vc_mode == KD_TEXT) {
996 accel_clear_margins(vc, info, 0);
997 update_screen(vc->vc_num);
998 }
999 if (save) {
1000 q = (unsigned short *) (vc->vc_origin +
1001 vc->vc_size_row *
1002 rows);
1003 scr_memcpyw(q, save, logo_lines * new_cols * 2);
1004 vc->vc_y += logo_lines;
1005 vc->vc_pos += logo_lines * vc->vc_size_row;
1006 kfree(save);
1007 }
1008 if (logo_lines > vc->vc_bottom) {
1009 logo_shown = -1;
1010 printk(KERN_INFO
1011 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
1012 } else {
1013 logo_shown = -2;
1014 vc->vc_top = logo_lines;
1015 }
1016 }
1017
1018 if (vc->vc_num == display_fg && softback_buf) {
1019 int l = fbcon_softback_size / vc->vc_size_row;
1020 if (l > 5)
1021 softback_end = softback_buf + l * vc->vc_size_row;
1022 else {
1023 /* Smaller scrollback makes no sense, and 0 would screw
1024 the operation totally */
1025 softback_top = 0;
1026 }
1027 }
1028 }
1029
1030 static void fbcon_deinit(struct vc_data *vc)
1031 {
1032 struct display *p = &fb_display[vc->vc_num];
1033
1034 if (info_idx != -1)
1035 return;
1036 fbcon_free_font(p);
1037 }
1038
1039 /* ====================================================================== */
1040
1041 /* fbcon_XXX routines - interface used by the world
1042 *
1043 * This system is now divided into two levels because of complications
1044 * caused by hardware scrolling. Top level functions:
1045 *
1046 * fbcon_bmove(), fbcon_clear(), fbcon_putc()
1047 *
1048 * handles y values in range [0, scr_height-1] that correspond to real
1049 * screen positions. y_wrap shift means that first line of bitmap may be
1050 * anywhere on this display. These functions convert lineoffsets to
1051 * bitmap offsets and deal with the wrap-around case by splitting blits.
1052 *
1053 * fbcon_bmove_physical_8() -- These functions fast implementations
1054 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1055 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1056 *
1057 * WARNING:
1058 *
1059 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1060 * Implies should only really hardware scroll in rows. Only reason for
1061 * restriction is simplicity & efficiency at the moment.
1062 */
1063
1064 static __inline__ int real_y(struct display *p, int ypos)
1065 {
1066 int rows = p->vrows;
1067
1068 ypos += p->yscroll;
1069 return ypos < rows ? ypos : ypos - rows;
1070 }
1071
1072
1073 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1074 int width)
1075 {
1076 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1077
1078 struct display *p = &fb_display[vc->vc_num];
1079 u_int y_break;
1080
1081 if (!info->fbops->fb_blank && console_blanked)
1082 return;
1083 if (info->state != FBINFO_STATE_RUNNING)
1084 return;
1085
1086 if (!height || !width)
1087 return;
1088
1089 /* Split blits that cross physical y_wrap boundary */
1090
1091 y_break = p->vrows - p->yscroll;
1092 if (sy < y_break && sy + height - 1 >= y_break) {
1093 u_int b = y_break - sy;
1094 accel_clear(vc, info, real_y(p, sy), sx, b, width);
1095 accel_clear(vc, info, real_y(p, sy + b), sx, height - b,
1096 width);
1097 } else
1098 accel_clear(vc, info, real_y(p, sy), sx, height, width);
1099 }
1100
1101 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1102 int count, int ypos, int xpos)
1103 {
1104 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1105 struct display *p = &fb_display[vc->vc_num];
1106
1107 if (!info->fbops->fb_blank && console_blanked)
1108 return;
1109 if (info->state != FBINFO_STATE_RUNNING)
1110 return;
1111
1112 if (vt_cons[vc->vc_num]->vc_mode != KD_TEXT)
1113 return;
1114
1115 accel_putcs(vc, info, s, count, real_y(p, ypos), xpos);
1116 }
1117
1118 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1119 {
1120 fbcon_putcs(vc, (const unsigned short *) &c, 1, ypos, xpos);
1121 }
1122
1123 static void fbcon_cursor(struct vc_data *vc, int mode)
1124 {
1125 struct fb_cursor cursor;
1126 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1127 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
1128 struct display *p = &fb_display[vc->vc_num];
1129 int w = (vc->vc_font.width + 7) >> 3, c;
1130 int y = real_y(p, vc->vc_y), fg, bg;
1131 int attribute;
1132 u8 *src;
1133
1134 if (mode & CM_SOFTBACK) {
1135 mode &= ~CM_SOFTBACK;
1136 if (softback_lines) {
1137 if (y + softback_lines >= vc->vc_rows)
1138 mode = CM_ERASE;
1139 else
1140 y += softback_lines;
1141 }
1142 } else if (softback_lines)
1143 fbcon_set_origin(vc);
1144
1145 c = scr_readw((u16 *) vc->vc_pos);
1146 attribute = get_attribute(info, c);
1147 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
1148 if (attribute) {
1149 u8 *dst;
1150
1151 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
1152 if (!dst)
1153 return;
1154 if (info->cursor.data)
1155 kfree(info->cursor.data);
1156 info->cursor.data = dst;
1157 update_attr(dst, src, attribute, vc);
1158 src = dst;
1159 }
1160
1161 cursor.image.data = src;
1162 cursor.set = FB_CUR_SETCUR;
1163 cursor.image.depth = 1;
1164
1165 switch (mode) {
1166 case CM_ERASE:
1167 if (info->cursor.rop == ROP_XOR) {
1168 info->cursor.enable = 0;
1169 info->cursor.rop = ROP_COPY;
1170 info->fbops->fb_cursor(info, &cursor);
1171 }
1172 break;
1173 case CM_MOVE:
1174 case CM_DRAW:
1175 info->cursor.enable = 1;
1176 fg = get_color(vc, info, c, 1);
1177 bg = get_color(vc, info, c, 0);
1178
1179 if (info->cursor.image.fg_color != fg ||
1180 info->cursor.image.bg_color != bg) {
1181 cursor.image.fg_color = fg;
1182 cursor.image.bg_color = bg;
1183 cursor.set |= FB_CUR_SETCMAP;
1184 }
1185
1186 if ((info->cursor.image.dx != (vc->vc_font.width * vc->vc_x)) ||
1187 (info->cursor.image.dy != (vc->vc_font.height * y))) {
1188 cursor.image.dx = vc->vc_font.width * vc->vc_x;
1189 cursor.image.dy = vc->vc_font.height * y;
1190 cursor.set |= FB_CUR_SETPOS;
1191 }
1192
1193 if (info->cursor.image.height != vc->vc_font.height ||
1194 info->cursor.image.width != vc->vc_font.width) {
1195 cursor.image.height = vc->vc_font.height;
1196 cursor.image.width = vc->vc_font.width;
1197 cursor.set |= FB_CUR_SETSIZE;
1198 }
1199
1200 if (info->cursor.hot.x || info->cursor.hot.y) {
1201 cursor.hot.x = cursor.hot.y = 0;
1202 cursor.set |= FB_CUR_SETHOT;
1203 }
1204
1205 if ((cursor.set & FB_CUR_SETSIZE) ||
1206 ((vc->vc_cursor_type & 0x0f) != p->cursor_shape)
1207 || info->cursor.mask == NULL) {
1208 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
1209 int cur_height, size, i = 0;
1210 u8 msk = 0xff;
1211
1212 if (!mask)
1213 return;
1214
1215 if (info->cursor.mask)
1216 kfree(info->cursor.mask);
1217 info->cursor.mask = mask;
1218 p->cursor_shape = vc->vc_cursor_type & 0x0f;
1219 cursor.set |= FB_CUR_SETSHAPE;
1220
1221 switch (vc->vc_cursor_type & 0x0f) {
1222 case CUR_NONE:
1223 cur_height = 0;
1224 break;
1225 case CUR_UNDERLINE:
1226 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
1227 break;
1228 case CUR_LOWER_THIRD:
1229 cur_height = vc->vc_font.height/3;
1230 break;
1231 case CUR_LOWER_HALF:
1232 cur_height = vc->vc_font.height >> 1;
1233 break;
1234 case CUR_TWO_THIRDS:
1235 cur_height = (vc->vc_font.height << 1)/3;
1236 break;
1237 case CUR_BLOCK:
1238 default:
1239 cur_height = vc->vc_font.height;
1240 break;
1241 }
1242 size = (vc->vc_font.height - cur_height) * w;
1243 while (size--)
1244 mask[i++] = ~msk;
1245 size = cur_height * w;
1246 while (size--)
1247 mask[i++] = msk;
1248 }
1249 info->cursor.rop = ROP_XOR;
1250 info->fbops->fb_cursor(info, &cursor);
1251 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1252 break;
1253 }
1254 }
1255
1256 static int scrollback_phys_max = 0;
1257 static int scrollback_max = 0;
1258 static int scrollback_current = 0;
1259
1260 int update_var(int con, struct fb_info *info)
1261 {
1262 if (con == info->currcon)
1263 return fb_pan_display(info, &info->var);
1264 return 0;
1265 }
1266
1267 static void fbcon_set_disp(struct fb_info *info, struct vc_data *vc)
1268 {
1269 struct display *p = &fb_display[vc->vc_num], *t;
1270 struct vc_data **default_mode = vc->vc_display_fg;
1271 int display_fg = (*default_mode)->vc_num;
1272 int rows, cols, charcnt = 256;
1273
1274 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
1275 if (var_to_display(p, &info->var, info))
1276 return;
1277 t = &fb_display[display_fg];
1278 if (!vc->vc_font.data) {
1279 vc->vc_font.data = p->fontdata = t->fontdata;
1280 vc->vc_font.width = (*default_mode)->vc_font.width;
1281 vc->vc_font.height = (*default_mode)->vc_font.height;
1282 p->userfont = t->userfont;
1283 if (p->userfont)
1284 REFCOUNT(p->fontdata)++;
1285 con_copy_unimap(vc->vc_num, display_fg);
1286 }
1287 if (p->userfont)
1288 charcnt = FNTCHARCNT(p->fontdata);
1289
1290 vc->vc_can_do_color = (fb_get_color_depth(info) != 1);
1291 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1292 if (charcnt == 256) {
1293 vc->vc_hi_font_mask = 0;
1294 } else {
1295 vc->vc_hi_font_mask = 0x100;
1296 if (vc->vc_can_do_color)
1297 vc->vc_complement_mask <<= 1;
1298 }
1299 cols = info->var.xres / vc->vc_font.width;
1300 rows = info->var.yres / vc->vc_font.height;
1301 vc_resize(vc->vc_num, cols, rows);
1302 if (CON_IS_VISIBLE(vc)) {
1303 update_screen(vc->vc_num);
1304 if (softback_buf) {
1305 int l = fbcon_softback_size / vc->vc_size_row;
1306
1307 if (l > 5)
1308 softback_end = softback_buf + l *
1309 vc->vc_size_row;
1310 else {
1311 /* Smaller scrollback makes no sense, and 0
1312 would screw the operation totally */
1313 softback_top = 0;
1314 }
1315 }
1316 }
1317 switch_screen(fg_console);
1318 }
1319
1320 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1321 {
1322 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1323 struct display *p = &fb_display[vc->vc_num];
1324
1325 p->yscroll += count;
1326 if (p->yscroll >= p->vrows) /* Deal with wrap */
1327 p->yscroll -= p->vrows;
1328 info->var.xoffset = 0;
1329 info->var.yoffset = p->yscroll * vc->vc_font.height;
1330 info->var.vmode |= FB_VMODE_YWRAP;
1331 update_var(vc->vc_num, info);
1332 scrollback_max += count;
1333 if (scrollback_max > scrollback_phys_max)
1334 scrollback_max = scrollback_phys_max;
1335 scrollback_current = 0;
1336 }
1337
1338 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1339 {
1340 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1341 struct display *p = &fb_display[vc->vc_num];
1342
1343 p->yscroll -= count;
1344 if (p->yscroll < 0) /* Deal with wrap */
1345 p->yscroll += p->vrows;
1346 info->var.xoffset = 0;
1347 info->var.yoffset = p->yscroll * vc->vc_font.height;
1348 info->var.vmode |= FB_VMODE_YWRAP;
1349 update_var(vc->vc_num, info);
1350 scrollback_max -= count;
1351 if (scrollback_max < 0)
1352 scrollback_max = 0;
1353 scrollback_current = 0;
1354 }
1355
1356 static __inline__ void ypan_up(struct vc_data *vc, int count)
1357 {
1358 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1359 struct display *p = &fb_display[vc->vc_num];
1360
1361 p->yscroll += count;
1362 if (p->yscroll > p->vrows - vc->vc_rows) {
1363 accel_bmove(vc, info, p->vrows - vc->vc_rows,
1364 0, 0, 0, vc->vc_rows, vc->vc_cols);
1365 p->yscroll -= p->vrows - vc->vc_rows;
1366 }
1367 info->var.xoffset = 0;
1368 info->var.yoffset = p->yscroll * vc->vc_font.height;
1369 info->var.vmode &= ~FB_VMODE_YWRAP;
1370 update_var(vc->vc_num, info);
1371 accel_clear_margins(vc, info, 1);
1372 scrollback_max += count;
1373 if (scrollback_max > scrollback_phys_max)
1374 scrollback_max = scrollback_phys_max;
1375 scrollback_current = 0;
1376 }
1377
1378 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1379 {
1380 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1381 struct display *p = &fb_display[vc->vc_num];
1382 int redraw = 0;
1383
1384 p->yscroll += count;
1385 if (p->yscroll > p->vrows - vc->vc_rows) {
1386 p->yscroll -= p->vrows - vc->vc_rows;
1387 redraw = 1;
1388 }
1389
1390 info->var.xoffset = 0;
1391 info->var.yoffset = p->yscroll * vc->vc_font.height;
1392 info->var.vmode &= ~FB_VMODE_YWRAP;
1393 if (redraw)
1394 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1395 update_var(vc->vc_num, info);
1396 accel_clear_margins(vc, info, 1);
1397 scrollback_max += count;
1398 if (scrollback_max > scrollback_phys_max)
1399 scrollback_max = scrollback_phys_max;
1400 scrollback_current = 0;
1401 }
1402
1403 static __inline__ void ypan_down(struct vc_data *vc, int count)
1404 {
1405 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1406 struct display *p = &fb_display[vc->vc_num];
1407
1408 p->yscroll -= count;
1409 if (p->yscroll < 0) {
1410 accel_bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1411 0, vc->vc_rows, vc->vc_cols);
1412 p->yscroll += p->vrows - vc->vc_rows;
1413 }
1414 info->var.xoffset = 0;
1415 info->var.yoffset = p->yscroll * vc->vc_font.height;
1416 info->var.vmode &= ~FB_VMODE_YWRAP;
1417 update_var(vc->vc_num, info);
1418 accel_clear_margins(vc, info, 1);
1419 scrollback_max -= count;
1420 if (scrollback_max < 0)
1421 scrollback_max = 0;
1422 scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1426 {
1427 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1428 struct display *p = &fb_display[vc->vc_num];
1429 int redraw = 0;
1430
1431 p->yscroll -= count;
1432 if (p->yscroll < 0) {
1433 p->yscroll += p->vrows - vc->vc_rows;
1434 redraw = 1;
1435 }
1436 info->var.xoffset = 0;
1437 info->var.yoffset = p->yscroll * vc->vc_font.height;
1438 info->var.vmode &= ~FB_VMODE_YWRAP;
1439 if (redraw)
1440 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1441 update_var(vc->vc_num, info);
1442 accel_clear_margins(vc, info, 1);
1443 scrollback_max -= count;
1444 if (scrollback_max < 0)
1445 scrollback_max = 0;
1446 scrollback_current = 0;
1447 }
1448
1449 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1450 long delta)
1451 {
1452 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1453 int count = vc->vc_rows;
1454 unsigned short *d, *s;
1455 unsigned long n;
1456 int line = 0;
1457
1458 d = (u16 *) softback_curr;
1459 if (d == (u16 *) softback_in)
1460 d = (u16 *) vc->vc_origin;
1461 n = softback_curr + delta * vc->vc_size_row;
1462 softback_lines -= delta;
1463 if (delta < 0) {
1464 if (softback_curr < softback_top && n < softback_buf) {
1465 n += softback_end - softback_buf;
1466 if (n < softback_top) {
1467 softback_lines -=
1468 (softback_top - n) / vc->vc_size_row;
1469 n = softback_top;
1470 }
1471 } else if (softback_curr >= softback_top
1472 && n < softback_top) {
1473 softback_lines -=
1474 (softback_top - n) / vc->vc_size_row;
1475 n = softback_top;
1476 }
1477 } else {
1478 if (softback_curr > softback_in && n >= softback_end) {
1479 n += softback_buf - softback_end;
1480 if (n > softback_in) {
1481 n = softback_in;
1482 softback_lines = 0;
1483 }
1484 } else if (softback_curr <= softback_in && n > softback_in) {
1485 n = softback_in;
1486 softback_lines = 0;
1487 }
1488 }
1489 if (n == softback_curr)
1490 return;
1491 softback_curr = n;
1492 s = (u16 *) softback_curr;
1493 if (s == (u16 *) softback_in)
1494 s = (u16 *) vc->vc_origin;
1495 while (count--) {
1496 unsigned short *start;
1497 unsigned short *le;
1498 unsigned short c;
1499 int x = 0;
1500 unsigned short attr = 1;
1501
1502 start = s;
1503 le = advance_row(s, 1);
1504 do {
1505 c = scr_readw(s);
1506 if (attr != (c & 0xff00)) {
1507 attr = c & 0xff00;
1508 if (s > start) {
1509 accel_putcs(vc, info, start, s - start,
1510 real_y(p, line), x);
1511 x += s - start;
1512 start = s;
1513 }
1514 }
1515 if (c == scr_readw(d)) {
1516 if (s > start) {
1517 accel_putcs(vc, info, start, s - start,
1518 real_y(p, line), x);
1519 x += s - start + 1;
1520 start = s + 1;
1521 } else {
1522 x++;
1523 start++;
1524 }
1525 }
1526 s++;
1527 d++;
1528 } while (s < le);
1529 if (s > start)
1530 accel_putcs(vc, info, start, s - start,
1531 real_y(p, line), x);
1532 line++;
1533 if (d == (u16 *) softback_end)
1534 d = (u16 *) softback_buf;
1535 if (d == (u16 *) softback_in)
1536 d = (u16 *) vc->vc_origin;
1537 if (s == (u16 *) softback_end)
1538 s = (u16 *) softback_buf;
1539 if (s == (u16 *) softback_in)
1540 s = (u16 *) vc->vc_origin;
1541 }
1542 }
1543
1544 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1545 int line, int count, int dy)
1546 {
1547 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1548 unsigned short *s = (unsigned short *)
1549 (vc->vc_origin + vc->vc_size_row * line);
1550
1551 while (count--) {
1552 unsigned short *start = s;
1553 unsigned short *le = advance_row(s, 1);
1554 unsigned short c;
1555 int x = 0;
1556 unsigned short attr = 1;
1557
1558 do {
1559 c = scr_readw(s);
1560 if (attr != (c & 0xff00)) {
1561 attr = c & 0xff00;
1562 if (s > start) {
1563 accel_putcs(vc, info, start, s - start,
1564 real_y(p, dy), x);
1565 x += s - start;
1566 start = s;
1567 }
1568 }
1569 console_conditional_schedule();
1570 s++;
1571 } while (s < le);
1572 if (s > start)
1573 accel_putcs(vc, info, start, s - start,
1574 real_y(p, dy), x);
1575 console_conditional_schedule();
1576 dy++;
1577 }
1578 }
1579
1580 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1581 int line, int count, int offset)
1582 {
1583 unsigned short *d = (unsigned short *)
1584 (vc->vc_origin + vc->vc_size_row * line);
1585 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1586 unsigned short *s = d + offset;
1587
1588 while (count--) {
1589 unsigned short *start = s;
1590 unsigned short *le = advance_row(s, 1);
1591 unsigned short c;
1592 int x = 0;
1593 unsigned short attr = 1;
1594
1595 do {
1596 c = scr_readw(s);
1597 if (attr != (c & 0xff00)) {
1598 attr = c & 0xff00;
1599 if (s > start) {
1600 accel_putcs(vc, info, start, s - start,
1601 real_y(p, line), x);
1602 x += s - start;
1603 start = s;
1604 }
1605 }
1606 if (c == scr_readw(d)) {
1607 if (s > start) {
1608 accel_putcs(vc, info, start, s - start,
1609 real_y(p, line), x);
1610 x += s - start + 1;
1611 start = s + 1;
1612 } else {
1613 x++;
1614 start++;
1615 }
1616 }
1617 scr_writew(c, d);
1618 console_conditional_schedule();
1619 s++;
1620 d++;
1621 } while (s < le);
1622 if (s > start)
1623 accel_putcs(vc, info, start, s - start,
1624 real_y(p, line), x);
1625 console_conditional_schedule();
1626 if (offset > 0)
1627 line++;
1628 else {
1629 line--;
1630 /* NOTE: We subtract two lines from these pointers */
1631 s -= vc->vc_size_row;
1632 d -= vc->vc_size_row;
1633 }
1634 }
1635 }
1636
1637 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1638 int count)
1639 {
1640 unsigned short *p;
1641
1642 if (vc->vc_num != fg_console)
1643 return;
1644 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1645
1646 while (count) {
1647 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1648 count--;
1649 p = advance_row(p, 1);
1650 softback_in += vc->vc_size_row;
1651 if (softback_in == softback_end)
1652 softback_in = softback_buf;
1653 if (softback_in == softback_top) {
1654 softback_top += vc->vc_size_row;
1655 if (softback_top == softback_end)
1656 softback_top = softback_buf;
1657 }
1658 }
1659 softback_curr = softback_in;
1660 }
1661
1662 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1663 int count)
1664 {
1665 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1666 struct display *p = &fb_display[vc->vc_num];
1667 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1668
1669 if (!info->fbops->fb_blank && console_blanked)
1670 return 0;
1671
1672 if (!count || vt_cons[vc->vc_num]->vc_mode != KD_TEXT)
1673 return 0;
1674
1675 fbcon_cursor(vc, CM_ERASE);
1676
1677 /*
1678 * ++Geert: Only use ywrap/ypan if the console is in text mode
1679 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1680 * whole screen (prevents flicker).
1681 */
1682
1683 switch (dir) {
1684 case SM_UP:
1685 if (count > vc->vc_rows) /* Maximum realistic size */
1686 count = vc->vc_rows;
1687 if (softback_top)
1688 fbcon_softback_note(vc, t, count);
1689 if (logo_shown >= 0)
1690 goto redraw_up;
1691 switch (p->scrollmode) {
1692 case SCROLL_MOVE:
1693 accel_bmove(vc, info, t + count, 0, t, 0,
1694 b - t - count, vc->vc_cols);
1695 accel_clear(vc, info, b - count, 0, count,
1696 vc->vc_cols);
1697 break;
1698
1699 case SCROLL_WRAP_MOVE:
1700 if (b - t - count > 3 * vc->vc_rows >> 2) {
1701 if (t > 0)
1702 fbcon_bmove(vc, 0, 0, count, 0, t,
1703 vc->vc_cols);
1704 ywrap_up(vc, count);
1705 if (vc->vc_rows - b > 0)
1706 fbcon_bmove(vc, b - count, 0, b, 0,
1707 vc->vc_rows - b,
1708 vc->vc_cols);
1709 } else if (info->flags & FBINFO_READS_FAST)
1710 fbcon_bmove(vc, t + count, 0, t, 0,
1711 b - t - count, vc->vc_cols);
1712 else
1713 goto redraw_up;
1714 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1715 break;
1716
1717 case SCROLL_PAN_REDRAW:
1718 if ((p->yscroll + count <=
1719 2 * (p->vrows - vc->vc_rows))
1720 && ((!scroll_partial && (b - t == vc->vc_rows))
1721 || (scroll_partial
1722 && (b - t - count >
1723 3 * vc->vc_rows >> 2)))) {
1724 if (t > 0)
1725 fbcon_redraw_move(vc, p, 0, t, count);
1726 ypan_up_redraw(vc, t, count);
1727 if (vc->vc_rows - b > 0)
1728 fbcon_redraw_move(vc, p, b - count,
1729 vc->vc_rows - b, b);
1730 } else
1731 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1732 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1733 break;
1734
1735 case SCROLL_PAN_MOVE:
1736 if ((p->yscroll + count <=
1737 2 * (p->vrows - vc->vc_rows))
1738 && ((!scroll_partial && (b - t == vc->vc_rows))
1739 || (scroll_partial
1740 && (b - t - count >
1741 3 * vc->vc_rows >> 2)))) {
1742 if (t > 0)
1743 fbcon_bmove(vc, 0, 0, count, 0, t,
1744 vc->vc_cols);
1745 ypan_up(vc, count);
1746 if (vc->vc_rows - b > 0)
1747 fbcon_bmove(vc, b - count, 0, b, 0,
1748 vc->vc_rows - b,
1749 vc->vc_cols);
1750 } else if (info->flags & FBINFO_READS_FAST)
1751 fbcon_bmove(vc, t + count, 0, t, 0,
1752 b - t - count, vc->vc_cols);
1753 else
1754 goto redraw_up;
1755 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1756 break;
1757
1758 case SCROLL_REDRAW:
1759 redraw_up:
1760 fbcon_redraw(vc, p, t, b - t - count,
1761 count * vc->vc_cols);
1762 accel_clear(vc, info, real_y(p, b - count), 0,
1763 count, vc->vc_cols);
1764 scr_memsetw((unsigned short *) (vc->vc_origin +
1765 vc->vc_size_row *
1766 (b - count)),
1767 vc->vc_video_erase_char,
1768 vc->vc_size_row * count);
1769 return 1;
1770 }
1771 break;
1772
1773 case SM_DOWN:
1774 if (count > vc->vc_rows) /* Maximum realistic size */
1775 count = vc->vc_rows;
1776 switch (p->scrollmode) {
1777 case SCROLL_MOVE:
1778 accel_bmove(vc, info, t, 0, t + count, 0,
1779 b - t - count, vc->vc_cols);
1780 accel_clear(vc, info, t, 0, count, vc->vc_cols);
1781 break;
1782
1783 case SCROLL_WRAP_MOVE:
1784 if (b - t - count > 3 * vc->vc_rows >> 2) {
1785 if (vc->vc_rows - b > 0)
1786 fbcon_bmove(vc, b, 0, b - count, 0,
1787 vc->vc_rows - b,
1788 vc->vc_cols);
1789 ywrap_down(vc, count);
1790 if (t > 0)
1791 fbcon_bmove(vc, count, 0, 0, 0, t,
1792 vc->vc_cols);
1793 } else if (info->flags & FBINFO_READS_FAST)
1794 fbcon_bmove(vc, t, 0, t + count, 0,
1795 b - t - count, vc->vc_cols);
1796 else
1797 goto redraw_down;
1798 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1799 break;
1800
1801 case SCROLL_PAN_MOVE:
1802 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1803 && ((!scroll_partial && (b - t == vc->vc_rows))
1804 || (scroll_partial
1805 && (b - t - count >
1806 3 * vc->vc_rows >> 2)))) {
1807 if (vc->vc_rows - b > 0)
1808 fbcon_bmove(vc, b, 0, b - count, 0,
1809 vc->vc_rows - b,
1810 vc->vc_cols);
1811 ypan_down(vc, count);
1812 if (t > 0)
1813 fbcon_bmove(vc, count, 0, 0, 0, t,
1814 vc->vc_cols);
1815 } else if (info->flags & FBINFO_READS_FAST)
1816 fbcon_bmove(vc, t, 0, t + count, 0,
1817 b - t - count, vc->vc_cols);
1818 else
1819 goto redraw_down;
1820 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1821 break;
1822
1823 case SCROLL_PAN_REDRAW:
1824 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1825 && ((!scroll_partial && (b - t == vc->vc_rows))
1826 || (scroll_partial
1827 && (b - t - count >
1828 3 * vc->vc_rows >> 2)))) {
1829 if (vc->vc_rows - b > 0)
1830 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1831 b - count);
1832 ypan_down_redraw(vc, t, count);
1833 if (t > 0)
1834 fbcon_redraw_move(vc, p, count, t, 0);
1835 } else
1836 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1837 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1838 break;
1839
1840 case SCROLL_REDRAW:
1841 redraw_down:
1842 fbcon_redraw(vc, p, b - 1, b - t - count,
1843 -count * vc->vc_cols);
1844 accel_clear(vc, info, real_y(p, t), 0, count,
1845 vc->vc_cols);
1846 scr_memsetw((unsigned short *) (vc->vc_origin +
1847 vc->vc_size_row *
1848 t),
1849 vc->vc_video_erase_char,
1850 vc->vc_size_row * count);
1851 return 1;
1852 }
1853 }
1854 return 0;
1855 }
1856
1857
1858 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1859 int height, int width)
1860 {
1861 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1862 struct display *p = &fb_display[vc->vc_num];
1863
1864 if (!info->fbops->fb_blank && console_blanked)
1865 return;
1866
1867 if (!width || !height)
1868 return;
1869
1870 /* Split blits that cross physical y_wrap case.
1871 * Pathological case involves 4 blits, better to use recursive
1872 * code rather than unrolled case
1873 *
1874 * Recursive invocations don't need to erase the cursor over and
1875 * over again, so we use fbcon_bmove_rec()
1876 */
1877 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1878 p->vrows - p->yscroll);
1879 }
1880
1881 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1882 int dy, int dx, int height, int width, u_int y_break)
1883 {
1884 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1885 u_int b;
1886
1887 if (sy < y_break && sy + height > y_break) {
1888 b = y_break - sy;
1889 if (dy < sy) { /* Avoid trashing self */
1890 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1891 y_break);
1892 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1893 height - b, width, y_break);
1894 } else {
1895 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1896 height - b, width, y_break);
1897 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1898 y_break);
1899 }
1900 return;
1901 }
1902
1903 if (dy < y_break && dy + height > y_break) {
1904 b = y_break - dy;
1905 if (dy < sy) { /* Avoid trashing self */
1906 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1907 y_break);
1908 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1909 height - b, width, y_break);
1910 } else {
1911 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1912 height - b, width, y_break);
1913 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1914 y_break);
1915 }
1916 return;
1917 }
1918 accel_bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1919 height, width);
1920 }
1921
1922 static __inline__ void updatescrollmode(struct display *p, struct fb_info *info,
1923 struct vc_data *vc)
1924 {
1925 int fh = vc->vc_font.height;
1926 int cap = info->flags;
1927 int good_pan = (cap & FBINFO_HWACCEL_YPAN)
1928 && divides(info->fix.ypanstep, vc->vc_font.height)
1929 && info->var.yres_virtual > info->var.yres;
1930 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP)
1931 && divides(info->fix.ywrapstep, vc->vc_font.height)
1932 && divides(vc->vc_font.height, info->var.yres_virtual);
1933 int reading_fast = cap & FBINFO_READS_FAST;
1934 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && !(cap & FBINFO_HWACCEL_DISABLED);
1935 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && !(cap & FBINFO_HWACCEL_DISABLED);
1936
1937 p->vrows = info->var.yres_virtual/fh;
1938 if (info->var.yres > (fh * (vc->vc_rows + 1)))
1939 p->vrows -= (info->var.yres - (fh * vc->vc_rows)) / fh;
1940 if ((info->var.yres % fh) && (info->var.yres_virtual % fh <
1941 info->var.yres % fh))
1942 p->vrows--;
1943
1944 if (good_wrap || good_pan) {
1945 if (reading_fast || fast_copyarea)
1946 p->scrollmode = good_wrap ? SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1947 else
1948 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1949 SCROLL_PAN_REDRAW;
1950 } else {
1951 if (reading_fast || (fast_copyarea && !fast_imageblit))
1952 p->scrollmode = SCROLL_MOVE;
1953 else
1954 p->scrollmode = SCROLL_REDRAW;
1955 }
1956 }
1957
1958 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1959 unsigned int height)
1960 {
1961 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
1962 struct display *p = &fb_display[vc->vc_num];
1963 struct fb_var_screeninfo var = info->var;
1964 int x_diff, y_diff;
1965 int fw = vc->vc_font.width;
1966 int fh = vc->vc_font.height;
1967
1968 var.xres = width * fw;
1969 var.yres = height * fh;
1970 x_diff = info->var.xres - var.xres;
1971 y_diff = info->var.yres - var.yres;
1972 if (x_diff < 0 || x_diff > fw || (y_diff < 0 || y_diff > fh)) {
1973 struct fb_videomode *mode;
1974
1975 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
1976 mode = fb_find_best_mode(&var, &info->modelist);
1977 if (mode == NULL)
1978 return -EINVAL;
1979 fb_videomode_to_var(&var, mode);
1980 if (width > var.xres/fw || height > var.yres/fh)
1981 return -EINVAL;
1982 /*
1983 * The following can probably have any value... Do we need to
1984 * set all of them?
1985 */
1986 var.bits_per_pixel = p->bits_per_pixel;
1987 var.xres_virtual = p->xres_virtual;
1988 var.yres_virtual = p->yres_virtual;
1989 var.accel_flags = p->accel_flags;
1990 var.width = p->width;
1991 var.height = p->height;
1992 var.red = p->red;
1993 var.green = p->green;
1994 var.blue = p->blue;
1995 var.transp = p->transp;
1996 var.nonstd = p->nonstd;
1997
1998 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
1999 if (CON_IS_VISIBLE(vc)) {
2000 var.activate = FB_ACTIVATE_NOW |
2001 FB_ACTIVATE_FORCE;
2002 fb_set_var(info, &var);
2003 info->flags &= ~FBINFO_MISC_MODESWITCH;
2004 }
2005 var_to_display(p, &info->var, info);
2006 }
2007 updatescrollmode(p, info, vc);
2008 return 0;
2009 }
2010
2011 static int fbcon_switch(struct vc_data *vc)
2012 {
2013 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
2014 struct display *p = &fb_display[vc->vc_num];
2015 struct fb_var_screeninfo var;
2016 int i;
2017
2018 if (softback_top) {
2019 int l = fbcon_softback_size / vc->vc_size_row;
2020 if (softback_lines)
2021 fbcon_set_origin(vc);
2022 softback_top = softback_curr = softback_in = softback_buf;
2023 softback_lines = 0;
2024
2025 if (l > 5)
2026 softback_end = softback_buf + l * vc->vc_size_row;
2027 else {
2028 /* Smaller scrollback makes no sense, and 0 would screw
2029 the operation totally */
2030 softback_top = 0;
2031 }
2032 }
2033 if (logo_shown >= 0) {
2034 struct vc_data *conp2 = vc_cons[logo_shown].d;
2035
2036 if (conp2->vc_top == logo_lines
2037 && conp2->vc_bottom == conp2->vc_rows)
2038 conp2->vc_top = 0;
2039 logo_shown = -1;
2040 }
2041
2042 /*
2043 * FIXME: If we have multiple fbdev's loaded, we need to
2044 * update all info->currcon. Perhaps, we can place this
2045 * in a centralized structure, but this might break some
2046 * drivers.
2047 *
2048 * info->currcon = vc->vc_num;
2049 */
2050 for (i = 0; i < FB_MAX; i++) {
2051 if (registered_fb[i] != NULL)
2052 registered_fb[i]->currcon = vc->vc_num;
2053 }
2054
2055 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2056 fb_videomode_to_var(&var, p->mode);
2057 display_to_var(&var, p);
2058 var.activate = FB_ACTIVATE_NOW;
2059
2060 /*
2061 * make sure we don't unnecessarily trip the memcmp()
2062 * in fb_set_var()
2063 */
2064 info->var.activate = var.activate;
2065 info->var.yoffset = info->var.xoffset = p->yscroll = 0;
2066 fb_set_var(info, &var);
2067
2068 if (info->flags & FBINFO_MISC_MODESWITCH) {
2069 if (info->fbops->fb_set_par)
2070 info->fbops->fb_set_par(info);
2071 info->flags &= ~FBINFO_MISC_MODESWITCH;
2072 }
2073
2074 vc->vc_can_do_color = (fb_get_color_depth(info) != 1);
2075 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2076 updatescrollmode(p, info, vc);
2077
2078 switch (p->scrollmode) {
2079 case SCROLL_WRAP_MOVE:
2080 scrollback_phys_max = p->vrows - vc->vc_rows;
2081 break;
2082 case SCROLL_PAN_MOVE:
2083 case SCROLL_PAN_REDRAW:
2084 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2085 if (scrollback_phys_max < 0)
2086 scrollback_phys_max = 0;
2087 break;
2088 default:
2089 scrollback_phys_max = 0;
2090 break;
2091 }
2092 scrollback_max = 0;
2093 scrollback_current = 0;
2094
2095 update_var(vc->vc_num, info);
2096 fbcon_set_palette(vc, color_table);
2097
2098 if (vt_cons[vc->vc_num]->vc_mode == KD_TEXT)
2099 accel_clear_margins(vc, info, 0);
2100 if (logo_shown == -2) {
2101 logo_shown = fg_console;
2102 /* This is protected above by initmem_freed */
2103 fb_show_logo(info);
2104 update_region(fg_console,
2105 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2106 vc->vc_size_row * (vc->vc_bottom -
2107 vc->vc_top) / 2);
2108 return 0;
2109 }
2110 return 1;
2111 }
2112
2113 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2114 {
2115 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
2116 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
2117 struct display *p = &fb_display[vc->vc_num];
2118
2119 if (mode_switch) {
2120 struct fb_var_screeninfo var = info->var;
2121
2122 /*
2123 * HACK ALERT: Some hardware will require reinitializion at this stage,
2124 * others will require it to be done as late as possible.
2125 * For now, we differentiate this with the
2126 * FBINFO_MISC_MODESWITCHLATE bitflag. Worst case will be
2127 * hardware that requires it here and another one later.
2128 * A definitive solution may require fixing X or the VT
2129 * system.
2130 */
2131 if (info->flags & FBINFO_MISC_MODESWITCHLATE)
2132 info->flags |= FBINFO_MISC_MODESWITCH;
2133
2134 if (blank) {
2135 fbcon_cursor(vc, CM_ERASE);
2136 return 0;
2137 }
2138
2139 if (!(info->flags & FBINFO_MISC_MODESWITCHLATE)) {
2140 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2141 fb_set_var(info, &var);
2142 }
2143 }
2144
2145 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2146
2147 if (!info->fbops->fb_blank) {
2148 if (blank) {
2149 unsigned short oldc;
2150 u_int height;
2151 u_int y_break;
2152
2153 oldc = vc->vc_video_erase_char;
2154 vc->vc_video_erase_char &= charmask;
2155 height = vc->vc_rows;
2156 y_break = p->vrows - p->yscroll;
2157 if (height > y_break) {
2158 accel_clear(vc, info, real_y(p, 0),
2159 0, y_break, vc->vc_cols);
2160 accel_clear(vc, info, real_y(p, y_break),
2161 0, height - y_break,
2162 vc->vc_cols);
2163 } else
2164 accel_clear(vc, info, real_y(p, 0),
2165 0, height, vc->vc_cols);
2166 vc->vc_video_erase_char = oldc;
2167 } else
2168 update_screen(vc->vc_num);
2169 return 0;
2170 } else
2171 return fb_blank(info, blank);
2172 }
2173
2174 static void fbcon_free_font(struct display *p)
2175 {
2176 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2177 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2178 p->fontdata = NULL;
2179 p->userfont = 0;
2180 }
2181
2182 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2183 {
2184 u8 *fontdata = vc->vc_font.data;
2185 u8 *data = font->data;
2186 int i, j;
2187
2188 font->width = vc->vc_font.width;
2189 font->height = vc->vc_font.height;
2190 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2191 if (!font->data)
2192 return 0;
2193
2194 if (font->width <= 8) {
2195 j = vc->vc_font.height;
2196 for (i = 0; i < font->charcount; i++) {
2197 memcpy(data, fontdata, j);
2198 memset(data + j, 0, 32 - j);
2199 data += 32;
2200 fontdata += j;
2201 }
2202 } else if (font->width <= 16) {
2203 j = vc->vc_font.height * 2;
2204 for (i = 0; i < font->charcount; i++) {
2205 memcpy(data, fontdata, j);
2206 memset(data + j, 0, 64 - j);
2207 data += 64;
2208 fontdata += j;
2209 }
2210 } else if (font->width <= 24) {
2211 for (i = 0; i < font->charcount; i++) {
2212 for (j = 0; j < vc->vc_font.height; j++) {
2213 *data++ = fontdata[0];
2214 *data++ = fontdata[1];
2215 *data++ = fontdata[2];
2216 fontdata += sizeof(u32);
2217 }
2218 memset(data, 0, 3 * (32 - j));
2219 data += 3 * (32 - j);
2220 }
2221 } else {
2222 j = vc->vc_font.height * 4;
2223 for (i = 0; i < font->charcount; i++) {
2224 memcpy(data, fontdata, j);
2225 memset(data + j, 0, 128 - j);
2226 data += 128;
2227 fontdata += j;
2228 }
2229 }
2230 return 0;
2231 }
2232
2233 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2234 u8 * data, int userfont)
2235 {
2236 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
2237 struct display *p = &fb_display[vc->vc_num];
2238 int resize;
2239 int cnt;
2240 char *old_data = NULL;
2241
2242 if (CON_IS_VISIBLE(vc) && softback_lines)
2243 fbcon_set_origin(vc);
2244
2245 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2246 if (p->userfont)
2247 old_data = vc->vc_font.data;
2248 if (userfont)
2249 cnt = FNTCHARCNT(data);
2250 else
2251 cnt = 256;
2252 vc->vc_font.data = p->fontdata = data;
2253 if ((p->userfont = userfont))
2254 REFCOUNT(data)++;
2255 vc->vc_font.width = w;
2256 vc->vc_font.height = h;
2257 if (vc->vc_hi_font_mask && cnt == 256) {
2258 vc->vc_hi_font_mask = 0;
2259 if (vc->vc_can_do_color) {
2260 vc->vc_complement_mask >>= 1;
2261 vc->vc_s_complement_mask >>= 1;
2262 }
2263
2264 /* ++Edmund: reorder the attribute bits */
2265 if (vc->vc_can_do_color) {
2266 unsigned short *cp =
2267 (unsigned short *) vc->vc_origin;
2268 int count = vc->vc_screenbuf_size / 2;
2269 unsigned short c;
2270 for (; count > 0; count--, cp++) {
2271 c = scr_readw(cp);
2272 scr_writew(((c & 0xfe00) >> 1) |
2273 (c & 0xff), cp);
2274 }
2275 c = vc->vc_video_erase_char;
2276 vc->vc_video_erase_char =
2277 ((c & 0xfe00) >> 1) | (c & 0xff);
2278 vc->vc_attr >>= 1;
2279 }
2280 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2281 vc->vc_hi_font_mask = 0x100;
2282 if (vc->vc_can_do_color) {
2283 vc->vc_complement_mask <<= 1;
2284 vc->vc_s_complement_mask <<= 1;
2285 }
2286
2287 /* ++Edmund: reorder the attribute bits */
2288 {
2289 unsigned short *cp =
2290 (unsigned short *) vc->vc_origin;
2291 int count = vc->vc_screenbuf_size / 2;
2292 unsigned short c;
2293 for (; count > 0; count--, cp++) {
2294 unsigned short newc;
2295 c = scr_readw(cp);
2296 if (vc->vc_can_do_color)
2297 newc =
2298 ((c & 0xff00) << 1) | (c &
2299 0xff);
2300 else
2301 newc = c & ~0x100;
2302 scr_writew(newc, cp);
2303 }
2304 c = vc->vc_video_erase_char;
2305 if (vc->vc_can_do_color) {
2306 vc->vc_video_erase_char =
2307 ((c & 0xff00) << 1) | (c & 0xff);
2308 vc->vc_attr <<= 1;
2309 } else
2310 vc->vc_video_erase_char = c & ~0x100;
2311 }
2312
2313 }
2314
2315 if (resize) {
2316 /* reset wrap/pan */
2317 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2318 vc_resize(vc->vc_num, info->var.xres / w, info->var.yres / h);
2319 if (CON_IS_VISIBLE(vc) && softback_buf) {
2320 int l = fbcon_softback_size / vc->vc_size_row;
2321 if (l > 5)
2322 softback_end =
2323 softback_buf + l * vc->vc_size_row;
2324 else {
2325 /* Smaller scrollback makes no sense, and 0 would screw
2326 the operation totally */
2327 softback_top = 0;
2328 }
2329 }
2330 } else if (CON_IS_VISIBLE(vc)
2331 && vt_cons[vc->vc_num]->vc_mode == KD_TEXT) {
2332 accel_clear_margins(vc, info, 0);
2333 update_screen(vc->vc_num);
2334 }
2335
2336 if (old_data && (--REFCOUNT(old_data) == 0))
2337 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2338 return 0;
2339 }
2340
2341 static int fbcon_copy_font(struct vc_data *vc, int con)
2342 {
2343 struct display *od = &fb_display[con];
2344 struct console_font *f = &vc->vc_font;
2345
2346 if (od->fontdata == f->data)
2347 return 0; /* already the same font... */
2348 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2349 }
2350
2351 /*
2352 * User asked to set font; we are guaranteed that
2353 * a) width and height are in range 1..32
2354 * b) charcount does not exceed 512
2355 */
2356
2357 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2358 {
2359 unsigned charcount = font->charcount;
2360 int w = font->width;
2361 int h = font->height;
2362 int size = h;
2363 int i, k;
2364 u8 *new_data, *data = font->data, *p;
2365
2366 if (charcount != 256 && charcount != 512)
2367 return -EINVAL;
2368
2369 if (w > 8) {
2370 if (w <= 16)
2371 size *= 2;
2372 else
2373 size *= 4;
2374 }
2375 size *= charcount;
2376
2377 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2378
2379 if (!new_data)
2380 return -ENOMEM;
2381
2382 new_data += FONT_EXTRA_WORDS * sizeof(int);
2383 FNTSIZE(new_data) = size;
2384 FNTCHARCNT(new_data) = charcount;
2385 REFCOUNT(new_data) = 0; /* usage counter */
2386 p = new_data;
2387 if (w <= 8) {
2388 for (i = 0; i < charcount; i++) {
2389 memcpy(p, data, h);
2390 data += 32;
2391 p += h;
2392 }
2393 } else if (w <= 16) {
2394 h *= 2;
2395 for (i = 0; i < charcount; i++) {
2396 memcpy(p, data, h);
2397 data += 64;
2398 p += h;
2399 }
2400 } else if (w <= 24) {
2401 for (i = 0; i < charcount; i++) {
2402 int j;
2403 for (j = 0; j < h; j++) {
2404 memcpy(p, data, 3);
2405 p[3] = 0;
2406 data += 3;
2407 p += sizeof(u32);
2408 }
2409 data += 3 * (32 - h);
2410 }
2411 } else {
2412 h *= 4;
2413 for (i = 0; i < charcount; i++) {
2414 memcpy(p, data, h);
2415 data += 128;
2416 p += h;
2417 }
2418 }
2419 /* we can do it in u32 chunks because of charcount is 256 or 512, so
2420 font length must be multiple of 256, at least. And 256 is multiple
2421 of 4 */
2422 k = 0;
2423 while (p > new_data) {
2424 p = (u8 *)((u32 *)p - 1);
2425 k += *(u32 *) p;
2426 }
2427 FNTSUM(new_data) = k;
2428 /* Check if the same font is on some other console already */
2429 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2430 struct vc_data *tmp = vc_cons[i].d;
2431
2432 if (fb_display[i].userfont &&
2433 fb_display[i].fontdata &&
2434 FNTSUM(fb_display[i].fontdata) == k &&
2435 FNTSIZE(fb_display[i].fontdata) == size &&
2436 tmp->vc_font.width == w &&
2437 !memcmp(fb_display[i].fontdata, new_data, size)) {
2438 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2439 new_data = fb_display[i].fontdata;
2440 break;
2441 }
2442 }
2443 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2444 }
2445
2446 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2447 {
2448 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
2449 struct font_desc *f;
2450
2451 if (!name)
2452 f = get_default_font(info->var.xres, info->var.yres);
2453 else if (!(f = find_font(name)))
2454 return -ENOENT;
2455
2456 font->width = f->width;
2457 font->height = f->height;
2458 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2459 }
2460
2461 static u16 palette_red[16];
2462 static u16 palette_green[16];
2463 static u16 palette_blue[16];
2464
2465 static struct fb_cmap palette_cmap = {
2466 0, 16, palette_red, palette_green, palette_blue, NULL
2467 };
2468
2469 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2470 {
2471 struct fb_info *info = registered_fb[(int) con2fb_map[vc->vc_num]];
2472 int i, j, k, depth;
2473 u8 val;
2474
2475 if (!info->fbops->fb_blank && console_blanked)
2476 return -EINVAL;
2477 depth = fb_get_color_depth(info);
2478 if (depth > 3) {
2479 for (i = j = 0; i < 16; i++) {
2480 k = table[i];
2481 val = vc->vc_palette[j++];
2482 palette_red[k] = (val << 8) | val;
2483 val = vc->vc_palette[j++];
2484 palette_green[k] = (val << 8) | val;
2485 val = vc->vc_palette[j++];
2486 palette_blue[k] = (val << 8) | val;
2487 }
2488 palette_cmap.len = 16;
2489 palette_cmap.start = 0;
2490 /*
2491 * If framebuffer is capable of less than 16 colors,
2492 * use default palette of fbcon.
2493 */
2494 } else
2495 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2496
2497 return fb_set_cmap(&palette_cmap, info);
2498 }
2499
2500 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2501 {
2502 unsigned long p;
2503 int line;
2504
2505 if (vc->vc_num != fg_console || !softback_lines)
2506 return (u16 *) (vc->vc_origin + offset);
2507 line = offset / vc->vc_size_row;
2508 if (line >= softback_lines)
2509 return (u16 *) (vc->vc_origin + offset -
2510 softback_lines * vc->vc_size_row);
2511 p = softback_curr + offset;
2512 if (p >= softback_end)
2513 p += softback_buf - softback_end;
2514 return (u16 *) p;
2515 }
2516
2517 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2518 int *px, int *py)
2519 {
2520 unsigned long ret;
2521 int x, y;
2522
2523 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2524 unsigned long offset = (pos - vc->vc_origin) / 2;
2525
2526 x = offset % vc->vc_cols;
2527 y = offset / vc->vc_cols;
2528 if (vc->vc_num == fg_console)
2529 y += softback_lines;
2530 ret = pos + (vc->vc_cols - x) * 2;
2531 } else if (vc->vc_num == fg_console && softback_lines) {
2532 unsigned long offset = pos - softback_curr;
2533
2534 if (pos < softback_curr)
2535 offset += softback_end - softback_buf;
2536 offset /= 2;
2537 x = offset % vc->vc_cols;
2538 y = offset / vc->vc_cols;
2539 ret = pos + (vc->vc_cols - x) * 2;
2540 if (ret == softback_end)
2541 ret = softback_buf;
2542 if (ret == softback_in)
2543 ret = vc->vc_origin;
2544 } else {
2545 /* Should not happen */
2546 x = y = 0;
2547 ret = vc->vc_origin;
2548 }
2549 if (px)
2550 *px = x;
2551 if (py)
2552 *py = y;
2553 return ret;
2554 }
2555
2556 /* As we might be inside of softback, we may work with non-contiguous buffer,
2557 that's why we have to use a separate routine. */
2558 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2559 {
2560 while (cnt--) {
2561 u16 a = scr_readw(p);
2562 if (!vc->vc_can_do_color)
2563 a ^= 0x0800;
2564 else if (vc->vc_hi_font_mask == 0x100)
2565 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2566 (((a) & 0x0e00) << 4);
2567 else
2568 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2569 (((a) & 0x0700) << 4);
2570 scr_writew(a, p++);
2571 if (p == (u16 *) softback_end)
2572 p = (u16 *) softback_buf;
2573 if (p == (u16 *) softback_in)
2574 p = (u16 *) vc->vc_origin;
2575 }
2576 }
2577
2578 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2579 {
2580 struct fb_info *info = registered_fb[(int) con2fb_map[fg_console]];
2581 struct display *p = &fb_display[fg_console];
2582 int offset, limit, scrollback_old;
2583
2584 if (softback_top) {
2585 if (vc->vc_num != fg_console)
2586 return 0;
2587 if (vt_cons[vc->vc_num]->vc_mode != KD_TEXT || !lines)
2588 return 0;
2589 if (logo_shown >= 0) {
2590 struct vc_data *conp2 = vc_cons[logo_shown].d;
2591
2592 if (conp2->vc_top == logo_lines
2593 && conp2->vc_bottom == conp2->vc_rows)
2594 conp2->vc_top = 0;
2595 if (logo_shown == vc->vc_num) {
2596 unsigned long p, q;
2597 int i;
2598
2599 p = softback_in;
2600 q = vc->vc_origin +
2601 logo_lines * vc->vc_size_row;
2602 for (i = 0; i < logo_lines; i++) {
2603 if (p == softback_top)
2604 break;
2605 if (p == softback_buf)
2606 p = softback_end;
2607 p -= vc->vc_size_row;
2608 q -= vc->vc_size_row;
2609 scr_memcpyw((u16 *) q, (u16 *) p,
2610 vc->vc_size_row);
2611 }
2612 softback_in = p;
2613 update_region(vc->vc_num, vc->vc_origin,
2614 logo_lines * vc->vc_cols);
2615 }
2616 logo_shown = -1;
2617 }
2618 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2619 fbcon_redraw_softback(vc, p, lines);
2620 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2621 return 0;
2622 }
2623
2624 if (!scrollback_phys_max)
2625 return -ENOSYS;
2626
2627 scrollback_old = scrollback_current;
2628 scrollback_current -= lines;
2629 if (scrollback_current < 0)
2630 scrollback_current = 0;
2631 else if (scrollback_current > scrollback_max)
2632 scrollback_current = scrollback_max;
2633 if (scrollback_current == scrollback_old)
2634 return 0;
2635
2636 if (!info->fbops->fb_blank &&
2637 (console_blanked || vt_cons[vc->vc_num]->vc_mode != KD_TEXT
2638 || !lines))
2639 return 0;
2640 fbcon_cursor(vc, CM_ERASE);
2641
2642 offset = p->yscroll - scrollback_current;
2643 limit = p->vrows;
2644 switch (p->scrollmode) {
2645 case SCROLL_WRAP_MOVE:
2646 info->var.vmode |= FB_VMODE_YWRAP;
2647 break;
2648 case SCROLL_PAN_MOVE:
2649 case SCROLL_PAN_REDRAW:
2650 limit -= vc->vc_rows;
2651 info->var.vmode &= ~FB_VMODE_YWRAP;
2652 break;
2653 }
2654 if (offset < 0)
2655 offset += limit;
2656 else if (offset >= limit)
2657 offset -= limit;
2658 info->var.xoffset = 0;
2659 info->var.yoffset = offset * vc->vc_font.height;
2660 update_var(vc->vc_num, info);
2661 if (!scrollback_current)
2662 fbcon_cursor(vc, CM_DRAW);
2663 return 0;
2664 }
2665
2666 static int fbcon_set_origin(struct vc_data *vc)
2667 {
2668 if (softback_lines && !console_blanked)
2669 fbcon_scrolldelta(vc, softback_lines);
2670 return 0;
2671 }
2672
2673 static void fbcon_suspended(struct fb_info *info)
2674 {
2675 /* Clear cursor, restore saved data */
2676 info->cursor.enable = 0;
2677 info->fbops->fb_cursor(info, &info->cursor);
2678 }
2679
2680 static void fbcon_resumed(struct fb_info *info)
2681 {
2682 struct vc_data *vc;
2683
2684 if (info->currcon < 0)
2685 return;
2686 vc = vc_cons[info->currcon].d;
2687
2688 update_screen(vc->vc_num);
2689 }
2690
2691 static void fbcon_modechanged(struct fb_info *info)
2692 {
2693 struct vc_data *vc = vc_cons[info->currcon].d;
2694 struct display *p;
2695 int rows, cols;
2696
2697 if (info->currcon < 0 || vt_cons[info->currcon]->vc_mode !=
2698 KD_TEXT)
2699 return;
2700 p = &fb_display[vc->vc_num];
2701
2702 info->var.xoffset = info->var.yoffset = p->yscroll = 0;
2703
2704 if (CON_IS_VISIBLE(vc)) {
2705 var_to_display(p, &info->var, info);
2706 cols = info->var.xres / vc->vc_font.width;
2707 rows = info->var.yres / vc->vc_font.height;
2708 vc_resize(vc->vc_num, cols, rows);
2709 updatescrollmode(p, info, vc);
2710 scrollback_max = 0;
2711 scrollback_current = 0;
2712 update_var(vc->vc_num, info);
2713 fbcon_set_palette(vc, color_table);
2714 update_screen(vc->vc_num);
2715 if (softback_buf) {
2716 int l = fbcon_softback_size / vc->vc_size_row;
2717 if (l > 5)
2718 softback_end = softback_buf + l * vc->vc_size_row;
2719 else {
2720 /* Smaller scrollback makes no sense, and 0
2721 would screw the operation totally */
2722 softback_top = 0;
2723 }
2724 }
2725 }
2726 }
2727
2728 static int fbcon_mode_deleted(struct fb_info *info,
2729 struct fb_videomode *mode)
2730 {
2731 struct fb_info *fb_info;
2732 struct display *p;
2733 int i, j, found = 0;
2734
2735 /* before deletion, ensure that mode is not in use */
2736 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2737 j = (int) con2fb_map[i];
2738 if (j == -1)
2739 continue;
2740 fb_info = registered_fb[j];
2741 if (fb_info != info)
2742 continue;
2743 p = &fb_display[i];
2744 if (!p || !p->mode)
2745 continue;
2746 if (fb_mode_is_equal(p->mode, mode)) {
2747 found = 1;
2748 break;
2749 }
2750 }
2751 return found;
2752 }
2753
2754 static int fbcon_fb_registered(int idx)
2755 {
2756 int ret = 0;
2757
2758 if (info_idx == -1) {
2759 info_idx = idx;
2760 ret = fbcon_takeover();
2761 }
2762
2763 return ret;
2764 }
2765
2766 static int fbcon_event_notify(struct notifier_block *self,
2767 unsigned long action, void *data)
2768 {
2769 struct fb_event *event = (struct fb_event *) data;
2770 struct fb_info *info = event->info;
2771 struct fb_videomode *mode;
2772 struct fb_con2fbmap *con2fb;
2773 int ret = 0;
2774
2775 switch(action) {
2776 case FB_EVENT_SUSPEND:
2777 fbcon_suspended(info);
2778 break;
2779 case FB_EVENT_RESUME:
2780 fbcon_resumed(info);
2781 break;
2782 case FB_EVENT_MODE_CHANGE:
2783 fbcon_modechanged(info);
2784 break;
2785 case FB_EVENT_MODE_DELETE:
2786 mode = (struct fb_videomode *) event->data;
2787 ret = fbcon_mode_deleted(info, mode);
2788 break;
2789 case FB_EVENT_FB_REGISTERED:
2790 ret = fbcon_fb_registered(info->node);
2791 break;
2792 case FB_EVENT_SET_CONSOLE_MAP:
2793 con2fb = (struct fb_con2fbmap *) event->data;
2794 ret = set_con2fb_map(con2fb->console - 1, con2fb->framebuffer);
2795 break;
2796 case FB_EVENT_GET_CONSOLE_MAP:
2797 con2fb = (struct fb_con2fbmap *) event->data;
2798 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2799 break;
2800 }
2801
2802 return ret;
2803 }
2804
2805 /*
2806 * The console `switch' structure for the frame buffer based console
2807 */
2808
2809 const struct consw fb_con = {
2810 .owner = THIS_MODULE,
2811 .con_startup = fbcon_startup,
2812 .con_init = fbcon_init,
2813 .con_deinit = fbcon_deinit,
2814 .con_clear = fbcon_clear,
2815 .con_putc = fbcon_putc,
2816 .con_putcs = fbcon_putcs,
2817 .con_cursor = fbcon_cursor,
2818 .con_scroll = fbcon_scroll,
2819 .con_bmove = fbcon_bmove,
2820 .con_switch = fbcon_switch,
2821 .con_blank = fbcon_blank,
2822 .con_font_set = fbcon_set_font,
2823 .con_font_get = fbcon_get_font,
2824 .con_font_default = fbcon_set_def_font,
2825 .con_font_copy = fbcon_copy_font,
2826 .con_set_palette = fbcon_set_palette,
2827 .con_scrolldelta = fbcon_scrolldelta,
2828 .con_set_origin = fbcon_set_origin,
2829 .con_invert_region = fbcon_invert_region,
2830 .con_screen_pos = fbcon_screen_pos,
2831 .con_getxy = fbcon_getxy,
2832 .con_resize = fbcon_resize,
2833 };
2834
2835 static struct notifier_block fbcon_event_notifier = {
2836 .notifier_call = fbcon_event_notify,
2837 };
2838
2839 int __init fb_console_init(void)
2840 {
2841 int i;
2842
2843 acquire_console_sem();
2844 fb_register_client(&fbcon_event_notifier);
2845 release_console_sem();
2846
2847 for (i = 0; i < MAX_NR_CONSOLES; i++)
2848 con2fb_map[i] = -1;
2849
2850 if (num_registered_fb) {
2851 for (i = 0; i < FB_MAX; i++) {
2852 if (registered_fb[i] != NULL) {
2853 info_idx = i;
2854 break;
2855 }
2856 }
2857 fbcon_takeover();
2858 }
2859
2860 return 0;
2861 }
2862
2863 module_init(fb_console_init);
2864
2865 #ifdef MODULE
2866
2867 void __exit fb_console_exit(void)
2868 {
2869 acquire_console_sem();
2870 fb_unregister_client(&fbcon_event_notifier);
2871 release_console_sem();
2872 give_up_console(&fb_con);
2873 }
2874
2875 module_exit(fb_console_exit);
2876
2877 #endif
2878
2879 /*
2880 * Visible symbols for modules
2881 */
2882
2883 EXPORT_SYMBOL(fb_display);
2884 EXPORT_SYMBOL(fb_con);
2885
2886 MODULE_LICENSE("GPL");
MOXA 2.6.9 from sdlinux-moxaart.tgz