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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / video / fbmem.c
blob02e08b32919718cc11edb4efacbbe3263d778615
1 /*
2 * linux/drivers/video/fbmem.c
3 *
4 * Copyright (C) 1994 Martin Schaller
5 *
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
11 * for more details.
12 */
13
14 #include <linux/module.h>
15
16 #include <linux/compat.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/major.h>
21 #include <linux/slab.h>
22 #include <linux/mm.h>
23 #include <linux/mman.h>
24 #include <linux/vt.h>
25 #include <linux/init.h>
26 #include <linux/linux_logo.h>
27 #include <linux/proc_fs.h>
28 #include <linux/seq_file.h>
29 #include <linux/console.h>
30 #include <linux/kmod.h>
31 #include <linux/err.h>
32 #include <linux/device.h>
33 #include <linux/efi.h>
34 #include <linux/fb.h>
35
36 #include <asm/fb.h>
37
38
39 /*
40 * Frame buffer device initialization and setup routines
41 */
42
43 #define FBPIXMAPSIZE (1024 * 8)
44
45 struct fb_info *registered_fb[FB_MAX] __read_mostly;
46 int num_registered_fb __read_mostly;
47
48 int lock_fb_info(struct fb_info *info)
49 {
50 mutex_lock(&info->lock);
51 if (!info->fbops) {
52 mutex_unlock(&info->lock);
53 return 0;
54 }
55 return 1;
56 }
57 EXPORT_SYMBOL(lock_fb_info);
58
59 /*
60 * Helpers
61 */
62
63 int fb_get_color_depth(struct fb_var_screeninfo *var,
64 struct fb_fix_screeninfo *fix)
65 {
66 int depth = 0;
67
68 if (fix->visual == FB_VISUAL_MONO01 ||
69 fix->visual == FB_VISUAL_MONO10)
70 depth = 1;
71 else {
72 if (var->green.length == var->blue.length &&
73 var->green.length == var->red.length &&
74 var->green.offset == var->blue.offset &&
75 var->green.offset == var->red.offset)
76 depth = var->green.length;
77 else
78 depth = var->green.length + var->red.length +
79 var->blue.length;
80 }
81
82 return depth;
83 }
84 EXPORT_SYMBOL(fb_get_color_depth);
85
86 /*
87 * Data padding functions.
88 */
89 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
90 {
91 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
92 }
93 EXPORT_SYMBOL(fb_pad_aligned_buffer);
94
95 void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
96 u32 shift_high, u32 shift_low, u32 mod)
97 {
98 u8 mask = (u8) (0xfff << shift_high), tmp;
99 int i, j;
100
101 for (i = height; i--; ) {
102 for (j = 0; j < idx; j++) {
103 tmp = dst[j];
104 tmp &= mask;
105 tmp |= *src >> shift_low;
106 dst[j] = tmp;
107 tmp = *src << shift_high;
108 dst[j+1] = tmp;
109 src++;
110 }
111 tmp = dst[idx];
112 tmp &= mask;
113 tmp |= *src >> shift_low;
114 dst[idx] = tmp;
115 if (shift_high < mod) {
116 tmp = *src << shift_high;
117 dst[idx+1] = tmp;
118 }
119 src++;
120 dst += d_pitch;
121 }
122 }
123 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
124
125 /*
126 * we need to lock this section since fb_cursor
127 * may use fb_imageblit()
128 */
129 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
130 {
131 u32 align = buf->buf_align - 1, offset;
132 char *addr = buf->addr;
133
134 /* If IO mapped, we need to sync before access, no sharing of
135 * the pixmap is done
136 */
137 if (buf->flags & FB_PIXMAP_IO) {
138 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
139 info->fbops->fb_sync(info);
140 return addr;
141 }
142
143 /* See if we fit in the remaining pixmap space */
144 offset = buf->offset + align;
145 offset &= ~align;
146 if (offset + size > buf->size) {
147 /* We do not fit. In order to be able to re-use the buffer,
148 * we must ensure no asynchronous DMA'ing or whatever operation
149 * is in progress, we sync for that.
150 */
151 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
152 info->fbops->fb_sync(info);
153 offset = 0;
154 }
155 buf->offset = offset + size;
156 addr += offset;
157
158 return addr;
159 }
160
161 #ifdef CONFIG_LOGO
162
163 static inline unsigned safe_shift(unsigned d, int n)
164 {
165 return n < 0 ? d >> -n : d << n;
166 }
167
168 static void fb_set_logocmap(struct fb_info *info,
169 const struct linux_logo *logo)
170 {
171 struct fb_cmap palette_cmap;
172 u16 palette_green[16];
173 u16 palette_blue[16];
174 u16 palette_red[16];
175 int i, j, n;
176 const unsigned char *clut = logo->clut;
177
178 palette_cmap.start = 0;
179 palette_cmap.len = 16;
180 palette_cmap.red = palette_red;
181 palette_cmap.green = palette_green;
182 palette_cmap.blue = palette_blue;
183 palette_cmap.transp = NULL;
184
185 for (i = 0; i < logo->clutsize; i += n) {
186 n = logo->clutsize - i;
187 /* palette_cmap provides space for only 16 colors at once */
188 if (n > 16)
189 n = 16;
190 palette_cmap.start = 32 + i;
191 palette_cmap.len = n;
192 for (j = 0; j < n; ++j) {
193 palette_cmap.red[j] = clut[0] << 8 | clut[0];
194 palette_cmap.green[j] = clut[1] << 8 | clut[1];
195 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
196 clut += 3;
197 }
198 fb_set_cmap(&palette_cmap, info);
199 }
200 }
201
202 static void fb_set_logo_truepalette(struct fb_info *info,
203 const struct linux_logo *logo,
204 u32 *palette)
205 {
206 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
207 unsigned char redmask, greenmask, bluemask;
208 int redshift, greenshift, blueshift;
209 int i;
210 const unsigned char *clut = logo->clut;
211
212 /*
213 * We have to create a temporary palette since console palette is only
214 * 16 colors long.
215 */
216 /* Bug: Doesn't obey msb_right ... (who needs that?) */
217 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
218 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
219 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
220 redshift = info->var.red.offset - (8 - info->var.red.length);
221 greenshift = info->var.green.offset - (8 - info->var.green.length);
222 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
223
224 for ( i = 0; i < logo->clutsize; i++) {
225 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
226 safe_shift((clut[1] & greenmask), greenshift) |
227 safe_shift((clut[2] & bluemask), blueshift));
228 clut += 3;
229 }
230 }
231
232 static void fb_set_logo_directpalette(struct fb_info *info,
233 const struct linux_logo *logo,
234 u32 *palette)
235 {
236 int redshift, greenshift, blueshift;
237 int i;
238
239 redshift = info->var.red.offset;
240 greenshift = info->var.green.offset;
241 blueshift = info->var.blue.offset;
242
243 for (i = 32; i < 32 + logo->clutsize; i++)
244 palette[i] = i << redshift | i << greenshift | i << blueshift;
245 }
246
247 static void fb_set_logo(struct fb_info *info,
248 const struct linux_logo *logo, u8 *dst,
249 int depth)
250 {
251 int i, j, k;
252 const u8 *src = logo->data;
253 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
254 u8 fg = 1, d;
255
256 switch (fb_get_color_depth(&info->var, &info->fix)) {
257 case 1:
258 fg = 1;
259 break;
260 case 2:
261 fg = 3;
262 break;
263 default:
264 fg = 7;
265 break;
266 }
267
268 if (info->fix.visual == FB_VISUAL_MONO01 ||
269 info->fix.visual == FB_VISUAL_MONO10)
270 fg = ~((u8) (0xfff << info->var.green.length));
271
272 switch (depth) {
273 case 4:
274 for (i = 0; i < logo->height; i++)
275 for (j = 0; j < logo->width; src++) {
276 *dst++ = *src >> 4;
277 j++;
278 if (j < logo->width) {
279 *dst++ = *src & 0x0f;
280 j++;
281 }
282 }
283 break;
284 case 1:
285 for (i = 0; i < logo->height; i++) {
286 for (j = 0; j < logo->width; src++) {
287 d = *src ^ xor;
288 for (k = 7; k >= 0; k--) {
289 *dst++ = ((d >> k) & 1) ? fg : 0;
290 j++;
291 }
292 }
293 }
294 break;
295 }
296 }
297
298 /*
299 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
300 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
301 * the visual format and color depth of the framebuffer, the DAC, the
302 * pseudo_palette, and the logo data will be adjusted accordingly.
303 *
304 * Case 1 - linux_logo_clut224:
305 * Color exceeds the number of console colors (16), thus we set the hardware DAC
306 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
307 *
308 * For visuals that require color info from the pseudo_palette, we also construct
309 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
310 * will be set.
311 *
312 * Case 2 - linux_logo_vga16:
313 * The number of colors just matches the console colors, thus there is no need
314 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
315 * each byte contains color information for two pixels (upper and lower nibble).
316 * To be consistent with fb_imageblit() usage, we therefore separate the two
317 * nibbles into separate bytes. The "depth" flag will be set to 4.
318 *
319 * Case 3 - linux_logo_mono:
320 * This is similar with Case 2. Each byte contains information for 8 pixels.
321 * We isolate each bit and expand each into a byte. The "depth" flag will
322 * be set to 1.
323 */
324 static struct logo_data {
325 int depth;
326 int needs_directpalette;
327 int needs_truepalette;
328 int needs_cmapreset;
329 const struct linux_logo *logo;
330 } fb_logo __read_mostly;
331
332 static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
333 {
334 u32 size = width * height, i;
335
336 out += size - 1;
337
338 for (i = size; i--; )
339 *out-- = *in++;
340 }
341
342 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
343 {
344 int i, j, h = height - 1;
345
346 for (i = 0; i < height; i++)
347 for (j = 0; j < width; j++)
348 out[height * j + h - i] = *in++;
349 }
350
351 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
352 {
353 int i, j, w = width - 1;
354
355 for (i = 0; i < height; i++)
356 for (j = 0; j < width; j++)
357 out[height * (w - j) + i] = *in++;
358 }
359
360 static void fb_rotate_logo(struct fb_info *info, u8 *dst,
361 struct fb_image *image, int rotate)
362 {
363 u32 tmp;
364
365 if (rotate == FB_ROTATE_UD) {
366 fb_rotate_logo_ud(image->data, dst, image->width,
367 image->height);
368 image->dx = info->var.xres - image->width - image->dx;
369 image->dy = info->var.yres - image->height - image->dy;
370 } else if (rotate == FB_ROTATE_CW) {
371 fb_rotate_logo_cw(image->data, dst, image->width,
372 image->height);
373 tmp = image->width;
374 image->width = image->height;
375 image->height = tmp;
376 tmp = image->dy;
377 image->dy = image->dx;
378 image->dx = info->var.xres - image->width - tmp;
379 } else if (rotate == FB_ROTATE_CCW) {
380 fb_rotate_logo_ccw(image->data, dst, image->width,
381 image->height);
382 tmp = image->width;
383 image->width = image->height;
384 image->height = tmp;
385 tmp = image->dx;
386 image->dx = image->dy;
387 image->dy = info->var.yres - image->height - tmp;
388 }
389
390 image->data = dst;
391 }
392
393 static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
394 int rotate, unsigned int num)
395 {
396 unsigned int x;
397
398 if (rotate == FB_ROTATE_UR) {
399 for (x = 0;
400 x < num && image->dx + image->width <= info->var.xres;
401 x++) {
402 info->fbops->fb_imageblit(info, image);
403 image->dx += image->width + 8;
404 }
405 } else if (rotate == FB_ROTATE_UD) {
406 for (x = 0; x < num && image->dx >= 0; x++) {
407 info->fbops->fb_imageblit(info, image);
408 image->dx -= image->width + 8;
409 }
410 } else if (rotate == FB_ROTATE_CW) {
411 for (x = 0;
412 x < num && image->dy + image->height <= info->var.yres;
413 x++) {
414 info->fbops->fb_imageblit(info, image);
415 image->dy += image->height + 8;
416 }
417 } else if (rotate == FB_ROTATE_CCW) {
418 for (x = 0; x < num && image->dy >= 0; x++) {
419 info->fbops->fb_imageblit(info, image);
420 image->dy -= image->height + 8;
421 }
422 }
423 }
424
425 static int fb_show_logo_line(struct fb_info *info, int rotate,
426 const struct linux_logo *logo, int y,
427 unsigned int n)
428 {
429 u32 *palette = NULL, *saved_pseudo_palette = NULL;
430 unsigned char *logo_new = NULL, *logo_rotate = NULL;
431 struct fb_image image;
432
433 /* Return if the frame buffer is not mapped or suspended */
434 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
435 info->flags & FBINFO_MODULE)
436 return 0;
437
438 image.depth = 8;
439 image.data = logo->data;
440
441 if (fb_logo.needs_cmapreset)
442 fb_set_logocmap(info, logo);
443
444 if (fb_logo.needs_truepalette ||
445 fb_logo.needs_directpalette) {
446 palette = kmalloc(256 * 4, GFP_KERNEL);
447 if (palette == NULL)
448 return 0;
449
450 if (fb_logo.needs_truepalette)
451 fb_set_logo_truepalette(info, logo, palette);
452 else
453 fb_set_logo_directpalette(info, logo, palette);
454
455 saved_pseudo_palette = info->pseudo_palette;
456 info->pseudo_palette = palette;
457 }
458
459 if (fb_logo.depth <= 4) {
460 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
461 if (logo_new == NULL) {
462 kfree(palette);
463 if (saved_pseudo_palette)
464 info->pseudo_palette = saved_pseudo_palette;
465 return 0;
466 }
467 image.data = logo_new;
468 fb_set_logo(info, logo, logo_new, fb_logo.depth);
469 }
470
471 image.dx = 0;
472 image.dy = y;
473 image.width = logo->width;
474 image.height = logo->height;
475
476 if (rotate) {
477 logo_rotate = kmalloc(logo->width *
478 logo->height, GFP_KERNEL);
479 if (logo_rotate)
480 fb_rotate_logo(info, logo_rotate, &image, rotate);
481 }
482
483 fb_do_show_logo(info, &image, rotate, n);
484
485 kfree(palette);
486 if (saved_pseudo_palette != NULL)
487 info->pseudo_palette = saved_pseudo_palette;
488 kfree(logo_new);
489 kfree(logo_rotate);
490 return logo->height;
491 }
492
493
494 #ifdef CONFIG_FB_LOGO_EXTRA
495
496 #define FB_LOGO_EX_NUM_MAX 10
497 static struct logo_data_extra {
498 const struct linux_logo *logo;
499 unsigned int n;
500 } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
501 static unsigned int fb_logo_ex_num;
502
503 void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
504 {
505 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
506 return;
507
508 fb_logo_ex[fb_logo_ex_num].logo = logo;
509 fb_logo_ex[fb_logo_ex_num].n = n;
510 fb_logo_ex_num++;
511 }
512
513 static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
514 unsigned int yres)
515 {
516 unsigned int i;
517
518 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
519 fb_logo_ex_num = 0;
520
521 for (i = 0; i < fb_logo_ex_num; i++) {
522 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
523 fb_logo_ex[i].logo = NULL;
524 continue;
525 }
526 height += fb_logo_ex[i].logo->height;
527 if (height > yres) {
528 height -= fb_logo_ex[i].logo->height;
529 fb_logo_ex_num = i;
530 break;
531 }
532 }
533 return height;
534 }
535
536 static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
537 {
538 unsigned int i;
539
540 for (i = 0; i < fb_logo_ex_num; i++)
541 y += fb_show_logo_line(info, rotate,
542 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
543
544 return y;
545 }
546
547 #else /* !CONFIG_FB_LOGO_EXTRA */
548
549 static inline int fb_prepare_extra_logos(struct fb_info *info,
550 unsigned int height,
551 unsigned int yres)
552 {
553 return height;
554 }
555
556 static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
557 {
558 return y;
559 }
560
561 #endif /* CONFIG_FB_LOGO_EXTRA */
562
563
564 int fb_prepare_logo(struct fb_info *info, int rotate)
565 {
566 int depth = fb_get_color_depth(&info->var, &info->fix);
567 unsigned int yres;
568
569 memset(&fb_logo, 0, sizeof(struct logo_data));
570
571 if (info->flags & FBINFO_MISC_TILEBLITTING ||
572 info->flags & FBINFO_MODULE)
573 return 0;
574
575 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
576 depth = info->var.blue.length;
577 if (info->var.red.length < depth)
578 depth = info->var.red.length;
579 if (info->var.green.length < depth)
580 depth = info->var.green.length;
581 }
582
583 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
584 /* assume console colormap */
585 depth = 4;
586 }
587
588 /* Return if no suitable logo was found */
589 fb_logo.logo = fb_find_logo(depth);
590
591 if (!fb_logo.logo) {
592 return 0;
593 }
594
595 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
596 yres = info->var.yres;
597 else
598 yres = info->var.xres;
599
600 if (fb_logo.logo->height > yres) {
601 fb_logo.logo = NULL;
602 return 0;
603 }
604
605 /* What depth we asked for might be different from what we get */
606 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
607 fb_logo.depth = 8;
608 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
609 fb_logo.depth = 4;
610 else
611 fb_logo.depth = 1;
612
613
614 if (fb_logo.depth > 4 && depth > 4) {
615 switch (info->fix.visual) {
616 case FB_VISUAL_TRUECOLOR:
617 fb_logo.needs_truepalette = 1;
618 break;
619 case FB_VISUAL_DIRECTCOLOR:
620 fb_logo.needs_directpalette = 1;
621 fb_logo.needs_cmapreset = 1;
622 break;
623 case FB_VISUAL_PSEUDOCOLOR:
624 fb_logo.needs_cmapreset = 1;
625 break;
626 }
627 }
628
629 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
630 }
631
632 int fb_show_logo(struct fb_info *info, int rotate)
633 {
634 int y;
635
636 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
637 num_online_cpus());
638 y = fb_show_extra_logos(info, y, rotate);
639
640 return y;
641 }
642 #else
643 int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
644 int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
645 #endif /* CONFIG_LOGO */
646
647 static void *fb_seq_start(struct seq_file *m, loff_t *pos)
648 {
649 return (*pos < FB_MAX) ? pos : NULL;
650 }
651
652 static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
653 {
654 (*pos)++;
655 return (*pos < FB_MAX) ? pos : NULL;
656 }
657
658 static void fb_seq_stop(struct seq_file *m, void *v)
659 {
660 }
661
662 static int fb_seq_show(struct seq_file *m, void *v)
663 {
664 int i = *(loff_t *)v;
665 struct fb_info *fi = registered_fb[i];
666
667 if (fi)
668 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
669 return 0;
670 }
671
672 static const struct seq_operations proc_fb_seq_ops = {
673 .start = fb_seq_start,
674 .next = fb_seq_next,
675 .stop = fb_seq_stop,
676 .show = fb_seq_show,
677 };
678
679 static int proc_fb_open(struct inode *inode, struct file *file)
680 {
681 return seq_open(file, &proc_fb_seq_ops);
682 }
683
684 static const struct file_operations fb_proc_fops = {
685 .owner = THIS_MODULE,
686 .open = proc_fb_open,
687 .read = seq_read,
688 .llseek = seq_lseek,
689 .release = seq_release,
690 };
691
692 static ssize_t
693 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
694 {
695 unsigned long p = *ppos;
696 struct inode *inode = file->f_path.dentry->d_inode;
697 int fbidx = iminor(inode);
698 struct fb_info *info = registered_fb[fbidx];
699 u32 *buffer, *dst;
700 u32 __iomem *src;
701 int c, i, cnt = 0, err = 0;
702 unsigned long total_size;
703
704 if (!info || ! info->screen_base)
705 return -ENODEV;
706
707 if (info->state != FBINFO_STATE_RUNNING)
708 return -EPERM;
709
710 if (info->fbops->fb_read)
711 return info->fbops->fb_read(info, buf, count, ppos);
712
713 total_size = info->screen_size;
714
715 if (total_size == 0)
716 total_size = info->fix.smem_len;
717
718 if (p >= total_size)
719 return 0;
720
721 if (count >= total_size)
722 count = total_size;
723
724 if (count + p > total_size)
725 count = total_size - p;
726
727 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
728 GFP_KERNEL);
729 if (!buffer)
730 return -ENOMEM;
731
732 src = (u32 __iomem *) (info->screen_base + p);
733
734 if (info->fbops->fb_sync)
735 info->fbops->fb_sync(info);
736
737 while (count) {
738 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
739 dst = buffer;
740 for (i = c >> 2; i--; )
741 *dst++ = fb_readl(src++);
742 if (c & 3) {
743 u8 *dst8 = (u8 *) dst;
744 u8 __iomem *src8 = (u8 __iomem *) src;
745
746 for (i = c & 3; i--;)
747 *dst8++ = fb_readb(src8++);
748
749 src = (u32 __iomem *) src8;
750 }
751
752 if (copy_to_user(buf, buffer, c)) {
753 err = -EFAULT;
754 break;
755 }
756 *ppos += c;
757 buf += c;
758 cnt += c;
759 count -= c;
760 }
761
762 kfree(buffer);
763
764 return (err) ? err : cnt;
765 }
766
767 static ssize_t
768 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
769 {
770 unsigned long p = *ppos;
771 struct inode *inode = file->f_path.dentry->d_inode;
772 int fbidx = iminor(inode);
773 struct fb_info *info = registered_fb[fbidx];
774 u32 *buffer, *src;
775 u32 __iomem *dst;
776 int c, i, cnt = 0, err = 0;
777 unsigned long total_size;
778
779 if (!info || !info->screen_base)
780 return -ENODEV;
781
782 if (info->state != FBINFO_STATE_RUNNING)
783 return -EPERM;
784
785 if (info->fbops->fb_write)
786 return info->fbops->fb_write(info, buf, count, ppos);
787
788 total_size = info->screen_size;
789
790 if (total_size == 0)
791 total_size = info->fix.smem_len;
792
793 if (p > total_size)
794 return -EFBIG;
795
796 if (count > total_size) {
797 err = -EFBIG;
798 count = total_size;
799 }
800
801 if (count + p > total_size) {
802 if (!err)
803 err = -ENOSPC;
804
805 count = total_size - p;
806 }
807
808 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
809 GFP_KERNEL);
810 if (!buffer)
811 return -ENOMEM;
812
813 dst = (u32 __iomem *) (info->screen_base + p);
814
815 if (info->fbops->fb_sync)
816 info->fbops->fb_sync(info);
817
818 while (count) {
819 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
820 src = buffer;
821
822 if (copy_from_user(src, buf, c)) {
823 err = -EFAULT;
824 break;
825 }
826
827 for (i = c >> 2; i--; )
828 fb_writel(*src++, dst++);
829
830 if (c & 3) {
831 u8 *src8 = (u8 *) src;
832 u8 __iomem *dst8 = (u8 __iomem *) dst;
833
834 for (i = c & 3; i--; )
835 fb_writeb(*src8++, dst8++);
836
837 dst = (u32 __iomem *) dst8;
838 }
839
840 *ppos += c;
841 buf += c;
842 cnt += c;
843 count -= c;
844 }
845
846 kfree(buffer);
847
848 return (cnt) ? cnt : err;
849 }
850
851 int
852 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
853 {
854 struct fb_fix_screeninfo *fix = &info->fix;
855 unsigned int yres = info->var.yres;
856 int err = 0;
857
858 if (var->yoffset > 0) {
859 if (var->vmode & FB_VMODE_YWRAP) {
860 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
861 err = -EINVAL;
862 else
863 yres = 0;
864 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
865 err = -EINVAL;
866 }
867
868 if (var->xoffset > 0 && (!fix->xpanstep ||
869 (var->xoffset % fix->xpanstep)))
870 err = -EINVAL;
871
872 if (err || !info->fbops->fb_pan_display ||
873 var->yoffset > info->var.yres_virtual - yres ||
874 var->xoffset > info->var.xres_virtual - info->var.xres)
875 return -EINVAL;
876
877 if ((err = info->fbops->fb_pan_display(var, info)))
878 return err;
879 info->var.xoffset = var->xoffset;
880 info->var.yoffset = var->yoffset;
881 if (var->vmode & FB_VMODE_YWRAP)
882 info->var.vmode |= FB_VMODE_YWRAP;
883 else
884 info->var.vmode &= ~FB_VMODE_YWRAP;
885 return 0;
886 }
887
888 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
889 u32 activate)
890 {
891 struct fb_event event;
892 struct fb_blit_caps caps, fbcaps;
893 int err = 0;
894
895 memset(&caps, 0, sizeof(caps));
896 memset(&fbcaps, 0, sizeof(fbcaps));
897 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
898 event.info = info;
899 event.data = &caps;
900 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
901 info->fbops->fb_get_caps(info, &fbcaps, var);
902
903 if (((fbcaps.x ^ caps.x) & caps.x) ||
904 ((fbcaps.y ^ caps.y) & caps.y) ||
905 (fbcaps.len < caps.len))
906 err = -EINVAL;
907
908 return err;
909 }
910
911 int
912 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
913 {
914 int flags = info->flags;
915 int ret = 0;
916
917 if (var->activate & FB_ACTIVATE_INV_MODE) {
918 struct fb_videomode mode1, mode2;
919
920 fb_var_to_videomode(&mode1, var);
921 fb_var_to_videomode(&mode2, &info->var);
922 /* make sure we don't delete the videomode of current var */
923 ret = fb_mode_is_equal(&mode1, &mode2);
924
925 if (!ret) {
926 struct fb_event event;
927
928 event.info = info;
929 event.data = &mode1;
930 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
931 }
932
933 if (!ret)
934 fb_delete_videomode(&mode1, &info->modelist);
935
936
937 ret = (ret) ? -EINVAL : 0;
938 goto done;
939 }
940
941 if ((var->activate & FB_ACTIVATE_FORCE) ||
942 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
943 u32 activate = var->activate;
944
945 if (!info->fbops->fb_check_var) {
946 *var = info->var;
947 goto done;
948 }
949
950 ret = info->fbops->fb_check_var(var, info);
951
952 if (ret)
953 goto done;
954
955 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
956 struct fb_var_screeninfo old_var;
957 struct fb_videomode mode;
958
959 if (info->fbops->fb_get_caps) {
960 ret = fb_check_caps(info, var, activate);
961
962 if (ret)
963 goto done;
964 }
965
966 old_var = info->var;
967 info->var = *var;
968
969 if (info->fbops->fb_set_par) {
970 ret = info->fbops->fb_set_par(info);
971
972 if (ret) {
973 info->var = old_var;
974 printk(KERN_WARNING "detected "
975 "fb_set_par error, "
976 "error code: %d\n", ret);
977 goto done;
978 }
979 }
980
981 fb_pan_display(info, &info->var);
982 fb_set_cmap(&info->cmap, info);
983 fb_var_to_videomode(&mode, &info->var);
984
985 if (info->modelist.prev && info->modelist.next &&
986 !list_empty(&info->modelist))
987 ret = fb_add_videomode(&mode, &info->modelist);
988
989 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
990 struct fb_event event;
991 int evnt = (activate & FB_ACTIVATE_ALL) ?
992 FB_EVENT_MODE_CHANGE_ALL :
993 FB_EVENT_MODE_CHANGE;
994
995 info->flags &= ~FBINFO_MISC_USEREVENT;
996 event.info = info;
997 event.data = &mode;
998 fb_notifier_call_chain(evnt, &event);
999 }
1000 }
1001 }
1002
1003 done:
1004 return ret;
1005 }
1006
1007 int
1008 fb_blank(struct fb_info *info, int blank)
1009 {
1010 int ret = -EINVAL;
1011
1012 if (blank > FB_BLANK_POWERDOWN)
1013 blank = FB_BLANK_POWERDOWN;
1014
1015 if (info->fbops->fb_blank)
1016 ret = info->fbops->fb_blank(blank, info);
1017
1018 if (!ret) {
1019 struct fb_event event;
1020
1021 event.info = info;
1022 event.data = &blank;
1023 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1024 }
1025
1026 return ret;
1027 }
1028
1029 static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1030 unsigned long arg)
1031 {
1032 struct fb_ops *fb;
1033 struct fb_var_screeninfo var;
1034 struct fb_fix_screeninfo fix;
1035 struct fb_con2fbmap con2fb;
1036 struct fb_cmap cmap_from;
1037 struct fb_cmap_user cmap;
1038 struct fb_event event;
1039 void __user *argp = (void __user *)arg;
1040 long ret = 0;
1041
1042 switch (cmd) {
1043 case FBIOGET_VSCREENINFO:
1044 if (!lock_fb_info(info))
1045 return -ENODEV;
1046 var = info->var;
1047 unlock_fb_info(info);
1048
1049 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1050 break;
1051 case FBIOPUT_VSCREENINFO:
1052 if (copy_from_user(&var, argp, sizeof(var)))
1053 return -EFAULT;
1054 if (!lock_fb_info(info))
1055 return -ENODEV;
1056 acquire_console_sem();
1057 info->flags |= FBINFO_MISC_USEREVENT;
1058 ret = fb_set_var(info, &var);
1059 info->flags &= ~FBINFO_MISC_USEREVENT;
1060 release_console_sem();
1061 unlock_fb_info(info);
1062 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1063 ret = -EFAULT;
1064 break;
1065 case FBIOGET_FSCREENINFO:
1066 if (!lock_fb_info(info))
1067 return -ENODEV;
1068 fix = info->fix;
1069 unlock_fb_info(info);
1070
1071 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1072 break;
1073 case FBIOPUTCMAP:
1074 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1075 return -EFAULT;
1076 ret = fb_set_user_cmap(&cmap, info);
1077 break;
1078 case FBIOGETCMAP:
1079 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1080 return -EFAULT;
1081 if (!lock_fb_info(info))
1082 return -ENODEV;
1083 cmap_from = info->cmap;
1084 unlock_fb_info(info);
1085 ret = fb_cmap_to_user(&cmap_from, &cmap);
1086 break;
1087 case FBIOPAN_DISPLAY:
1088 if (copy_from_user(&var, argp, sizeof(var)))
1089 return -EFAULT;
1090 if (!lock_fb_info(info))
1091 return -ENODEV;
1092 acquire_console_sem();
1093 ret = fb_pan_display(info, &var);
1094 release_console_sem();
1095 unlock_fb_info(info);
1096 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1097 return -EFAULT;
1098 break;
1099 case FBIO_CURSOR:
1100 ret = -EINVAL;
1101 break;
1102 case FBIOGET_CON2FBMAP:
1103 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1104 return -EFAULT;
1105 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1106 return -EINVAL;
1107 con2fb.framebuffer = -1;
1108 event.data = &con2fb;
1109 if (!lock_fb_info(info))
1110 return -ENODEV;
1111 event.info = info;
1112 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1113 unlock_fb_info(info);
1114 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1115 break;
1116 case FBIOPUT_CON2FBMAP:
1117 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1118 return -EFAULT;
1119 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1120 return -EINVAL;
1121 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1122 return -EINVAL;
1123 if (!registered_fb[con2fb.framebuffer])
1124 request_module("fb%d", con2fb.framebuffer);
1125 if (!registered_fb[con2fb.framebuffer]) {
1126 ret = -EINVAL;
1127 break;
1128 }
1129 event.data = &con2fb;
1130 if (!lock_fb_info(info))
1131 return -ENODEV;
1132 event.info = info;
1133 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1134 unlock_fb_info(info);
1135 break;
1136 case FBIOBLANK:
1137 if (!lock_fb_info(info))
1138 return -ENODEV;
1139 acquire_console_sem();
1140 info->flags |= FBINFO_MISC_USEREVENT;
1141 ret = fb_blank(info, arg);
1142 info->flags &= ~FBINFO_MISC_USEREVENT;
1143 release_console_sem();
1144 unlock_fb_info(info);
1145 break;
1146 default:
1147 if (!lock_fb_info(info))
1148 return -ENODEV;
1149 fb = info->fbops;
1150 if (fb->fb_ioctl)
1151 ret = fb->fb_ioctl(info, cmd, arg);
1152 else
1153 ret = -ENOTTY;
1154 unlock_fb_info(info);
1155 }
1156 return ret;
1157 }
1158
1159 static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1160 {
1161 struct inode *inode = file->f_path.dentry->d_inode;
1162 int fbidx = iminor(inode);
1163 struct fb_info *info = registered_fb[fbidx];
1164
1165 return do_fb_ioctl(info, cmd, arg);
1166 }
1167
1168 #ifdef CONFIG_COMPAT
1169 struct fb_fix_screeninfo32 {
1170 char id[16];
1171 compat_caddr_t smem_start;
1172 u32 smem_len;
1173 u32 type;
1174 u32 type_aux;
1175 u32 visual;
1176 u16 xpanstep;
1177 u16 ypanstep;
1178 u16 ywrapstep;
1179 u32 line_length;
1180 compat_caddr_t mmio_start;
1181 u32 mmio_len;
1182 u32 accel;
1183 u16 reserved[3];
1184 };
1185
1186 struct fb_cmap32 {
1187 u32 start;
1188 u32 len;
1189 compat_caddr_t red;
1190 compat_caddr_t green;
1191 compat_caddr_t blue;
1192 compat_caddr_t transp;
1193 };
1194
1195 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1196 unsigned long arg)
1197 {
1198 struct fb_cmap_user __user *cmap;
1199 struct fb_cmap32 __user *cmap32;
1200 __u32 data;
1201 int err;
1202
1203 cmap = compat_alloc_user_space(sizeof(*cmap));
1204 cmap32 = compat_ptr(arg);
1205
1206 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1207 return -EFAULT;
1208
1209 if (get_user(data, &cmap32->red) ||
1210 put_user(compat_ptr(data), &cmap->red) ||
1211 get_user(data, &cmap32->green) ||
1212 put_user(compat_ptr(data), &cmap->green) ||
1213 get_user(data, &cmap32->blue) ||
1214 put_user(compat_ptr(data), &cmap->blue) ||
1215 get_user(data, &cmap32->transp) ||
1216 put_user(compat_ptr(data), &cmap->transp))
1217 return -EFAULT;
1218
1219 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1220
1221 if (!err) {
1222 if (copy_in_user(&cmap32->start,
1223 &cmap->start,
1224 2 * sizeof(__u32)))
1225 err = -EFAULT;
1226 }
1227 return err;
1228 }
1229
1230 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1231 struct fb_fix_screeninfo32 __user *fix32)
1232 {
1233 __u32 data;
1234 int err;
1235
1236 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1237
1238 data = (__u32) (unsigned long) fix->smem_start;
1239 err |= put_user(data, &fix32->smem_start);
1240
1241 err |= put_user(fix->smem_len, &fix32->smem_len);
1242 err |= put_user(fix->type, &fix32->type);
1243 err |= put_user(fix->type_aux, &fix32->type_aux);
1244 err |= put_user(fix->visual, &fix32->visual);
1245 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1246 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1247 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1248 err |= put_user(fix->line_length, &fix32->line_length);
1249
1250 data = (__u32) (unsigned long) fix->mmio_start;
1251 err |= put_user(data, &fix32->mmio_start);
1252
1253 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1254 err |= put_user(fix->accel, &fix32->accel);
1255 err |= copy_to_user(fix32->reserved, fix->reserved,
1256 sizeof(fix->reserved));
1257
1258 return err;
1259 }
1260
1261 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1262 unsigned long arg)
1263 {
1264 mm_segment_t old_fs;
1265 struct fb_fix_screeninfo fix;
1266 struct fb_fix_screeninfo32 __user *fix32;
1267 int err;
1268
1269 fix32 = compat_ptr(arg);
1270
1271 old_fs = get_fs();
1272 set_fs(KERNEL_DS);
1273 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1274 set_fs(old_fs);
1275
1276 if (!err)
1277 err = do_fscreeninfo_to_user(&fix, fix32);
1278
1279 return err;
1280 }
1281
1282 static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1283 unsigned long arg)
1284 {
1285 struct inode *inode = file->f_path.dentry->d_inode;
1286 int fbidx = iminor(inode);
1287 struct fb_info *info = registered_fb[fbidx];
1288 struct fb_ops *fb = info->fbops;
1289 long ret = -ENOIOCTLCMD;
1290
1291 switch(cmd) {
1292 case FBIOGET_VSCREENINFO:
1293 case FBIOPUT_VSCREENINFO:
1294 case FBIOPAN_DISPLAY:
1295 case FBIOGET_CON2FBMAP:
1296 case FBIOPUT_CON2FBMAP:
1297 arg = (unsigned long) compat_ptr(arg);
1298 case FBIOBLANK:
1299 ret = do_fb_ioctl(info, cmd, arg);
1300 break;
1301
1302 case FBIOGET_FSCREENINFO:
1303 ret = fb_get_fscreeninfo(info, cmd, arg);
1304 break;
1305
1306 case FBIOGETCMAP:
1307 case FBIOPUTCMAP:
1308 ret = fb_getput_cmap(info, cmd, arg);
1309 break;
1310
1311 default:
1312 if (fb->fb_compat_ioctl)
1313 ret = fb->fb_compat_ioctl(info, cmd, arg);
1314 break;
1315 }
1316 return ret;
1317 }
1318 #endif
1319
1320 static int
1321 fb_mmap(struct file *file, struct vm_area_struct * vma)
1322 {
1323 int fbidx = iminor(file->f_path.dentry->d_inode);
1324 struct fb_info *info = registered_fb[fbidx];
1325 struct fb_ops *fb = info->fbops;
1326 unsigned long off;
1327 unsigned long start;
1328 u32 len;
1329
1330 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1331 return -EINVAL;
1332 off = vma->vm_pgoff << PAGE_SHIFT;
1333 if (!fb)
1334 return -ENODEV;
1335 mutex_lock(&info->mm_lock);
1336 if (fb->fb_mmap) {
1337 int res;
1338 res = fb->fb_mmap(info, vma);
1339 mutex_unlock(&info->mm_lock);
1340 return res;
1341 }
1342
1343 /* frame buffer memory */
1344 start = info->fix.smem_start;
1345 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1346 if (off >= len) {
1347 /* memory mapped io */
1348 off -= len;
1349 if (info->var.accel_flags) {
1350 mutex_unlock(&info->mm_lock);
1351 return -EINVAL;
1352 }
1353 start = info->fix.mmio_start;
1354 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1355 }
1356 mutex_unlock(&info->mm_lock);
1357 start &= PAGE_MASK;
1358 if ((vma->vm_end - vma->vm_start + off) > len)
1359 return -EINVAL;
1360 off += start;
1361 vma->vm_pgoff = off >> PAGE_SHIFT;
1362 /* This is an IO map - tell maydump to skip this VMA */
1363 vma->vm_flags |= VM_IO | VM_RESERVED;
1364 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1365 fb_pgprotect(file, vma, off);
1366 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1367 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1368 return -EAGAIN;
1369 return 0;
1370 }
1371
1372 static int
1373 fb_open(struct inode *inode, struct file *file)
1374 __acquires(&info->lock)
1375 __releases(&info->lock)
1376 {
1377 int fbidx = iminor(inode);
1378 struct fb_info *info;
1379 int res = 0;
1380
1381 if (fbidx >= FB_MAX)
1382 return -ENODEV;
1383 info = registered_fb[fbidx];
1384 if (!info)
1385 request_module("fb%d", fbidx);
1386 info = registered_fb[fbidx];
1387 if (!info)
1388 return -ENODEV;
1389 mutex_lock(&info->lock);
1390 if (!try_module_get(info->fbops->owner)) {
1391 res = -ENODEV;
1392 goto out;
1393 }
1394 file->private_data = info;
1395 if (info->fbops->fb_open) {
1396 res = info->fbops->fb_open(info,1);
1397 if (res)
1398 module_put(info->fbops->owner);
1399 }
1400 #ifdef CONFIG_FB_DEFERRED_IO
1401 if (info->fbdefio)
1402 fb_deferred_io_open(info, inode, file);
1403 #endif
1404 out:
1405 mutex_unlock(&info->lock);
1406 return res;
1407 }
1408
1409 static int
1410 fb_release(struct inode *inode, struct file *file)
1411 __acquires(&info->lock)
1412 __releases(&info->lock)
1413 {
1414 struct fb_info * const info = file->private_data;
1415
1416 mutex_lock(&info->lock);
1417 if (info->fbops->fb_release)
1418 info->fbops->fb_release(info,1);
1419 module_put(info->fbops->owner);
1420 mutex_unlock(&info->lock);
1421 return 0;
1422 }
1423
1424 static const struct file_operations fb_fops = {
1425 .owner = THIS_MODULE,
1426 .read = fb_read,
1427 .write = fb_write,
1428 .unlocked_ioctl = fb_ioctl,
1429 #ifdef CONFIG_COMPAT
1430 .compat_ioctl = fb_compat_ioctl,
1431 #endif
1432 .mmap = fb_mmap,
1433 .open = fb_open,
1434 .release = fb_release,
1435 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1436 .get_unmapped_area = get_fb_unmapped_area,
1437 #endif
1438 #ifdef CONFIG_FB_DEFERRED_IO
1439 .fsync = fb_deferred_io_fsync,
1440 #endif
1441 };
1442
1443 struct class *fb_class;
1444 EXPORT_SYMBOL(fb_class);
1445
1446 static int fb_check_foreignness(struct fb_info *fi)
1447 {
1448 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1449
1450 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1451
1452 #ifdef __BIG_ENDIAN
1453 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1454 #else
1455 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1456 #endif /* __BIG_ENDIAN */
1457
1458 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1459 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1460 "support this framebuffer\n", fi->fix.id);
1461 return -ENOSYS;
1462 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1463 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1464 "support this framebuffer\n", fi->fix.id);
1465 return -ENOSYS;
1466 }
1467
1468 return 0;
1469 }
1470
1471 static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1472 {
1473 /* is the generic aperture base the same as the HW one */
1474 if (gen->base == hw->base)
1475 return true;
1476 /* is the generic aperture base inside the hw base->hw base+size */
1477 if (gen->base > hw->base && gen->base <= hw->base + hw->size)
1478 return true;
1479 return false;
1480 }
1481
1482 static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1483 struct apertures_struct *hwa)
1484 {
1485 int i, j;
1486 if (!hwa || !gena)
1487 return false;
1488
1489 for (i = 0; i < hwa->count; ++i) {
1490 struct aperture *h = &hwa->ranges[i];
1491 for (j = 0; j < gena->count; ++j) {
1492 struct aperture *g = &gena->ranges[j];
1493 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1494 (unsigned long long)g->base,
1495 (unsigned long long)g->size,
1496 (unsigned long long)h->base,
1497 (unsigned long long)h->size);
1498 if (apertures_overlap(g, h))
1499 return true;
1500 }
1501 }
1502
1503 return false;
1504 }
1505
1506 #define VGA_FB_PHYS 0xA0000
1507 void remove_conflicting_framebuffers(struct apertures_struct *a,
1508 const char *name, bool primary)
1509 {
1510 int i;
1511
1512 /* check all firmware fbs and kick off if the base addr overlaps */
1513 for (i = 0 ; i < FB_MAX; i++) {
1514 struct apertures_struct *gen_aper;
1515 if (!registered_fb[i])
1516 continue;
1517
1518 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1519 continue;
1520
1521 gen_aper = registered_fb[i]->apertures;
1522 if (fb_do_apertures_overlap(gen_aper, a) ||
1523 (primary && gen_aper && gen_aper->count &&
1524 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1525
1526 printk(KERN_ERR "fb: conflicting fb hw usage "
1527 "%s vs %s - removing generic driver\n",
1528 name, registered_fb[i]->fix.id);
1529 unregister_framebuffer(registered_fb[i]);
1530 }
1531 }
1532 }
1533 EXPORT_SYMBOL(remove_conflicting_framebuffers);
1534
1535 /**
1536 * register_framebuffer - registers a frame buffer device
1537 * @fb_info: frame buffer info structure
1538 *
1539 * Registers a frame buffer device @fb_info.
1540 *
1541 * Returns negative errno on error, or zero for success.
1542 *
1543 */
1544
1545 int
1546 register_framebuffer(struct fb_info *fb_info)
1547 {
1548 int i;
1549 struct fb_event event;
1550 struct fb_videomode mode;
1551
1552 if (num_registered_fb == FB_MAX)
1553 return -ENXIO;
1554
1555 if (fb_check_foreignness(fb_info))
1556 return -ENOSYS;
1557
1558 remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id,
1559 fb_is_primary_device(fb_info));
1560
1561 num_registered_fb++;
1562 for (i = 0 ; i < FB_MAX; i++)
1563 if (!registered_fb[i])
1564 break;
1565 fb_info->node = i;
1566 mutex_init(&fb_info->lock);
1567 mutex_init(&fb_info->mm_lock);
1568
1569 fb_info->dev = device_create(fb_class, fb_info->device,
1570 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1571 if (IS_ERR(fb_info->dev)) {
1572 /* Not fatal */
1573 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1574 fb_info->dev = NULL;
1575 } else
1576 fb_init_device(fb_info);
1577
1578 if (fb_info->pixmap.addr == NULL) {
1579 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1580 if (fb_info->pixmap.addr) {
1581 fb_info->pixmap.size = FBPIXMAPSIZE;
1582 fb_info->pixmap.buf_align = 1;
1583 fb_info->pixmap.scan_align = 1;
1584 fb_info->pixmap.access_align = 32;
1585 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1586 }
1587 }
1588 fb_info->pixmap.offset = 0;
1589
1590 if (!fb_info->pixmap.blit_x)
1591 fb_info->pixmap.blit_x = ~(u32)0;
1592
1593 if (!fb_info->pixmap.blit_y)
1594 fb_info->pixmap.blit_y = ~(u32)0;
1595
1596 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1597 INIT_LIST_HEAD(&fb_info->modelist);
1598
1599 fb_var_to_videomode(&mode, &fb_info->var);
1600 fb_add_videomode(&mode, &fb_info->modelist);
1601 registered_fb[i] = fb_info;
1602
1603 event.info = fb_info;
1604 if (!lock_fb_info(fb_info))
1605 return -ENODEV;
1606 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1607 unlock_fb_info(fb_info);
1608 return 0;
1609 }
1610
1611
1612 /**
1613 * unregister_framebuffer - releases a frame buffer device
1614 * @fb_info: frame buffer info structure
1615 *
1616 * Unregisters a frame buffer device @fb_info.
1617 *
1618 * Returns negative errno on error, or zero for success.
1619 *
1620 * This function will also notify the framebuffer console
1621 * to release the driver.
1622 *
1623 * This is meant to be called within a driver's module_exit()
1624 * function. If this is called outside module_exit(), ensure
1625 * that the driver implements fb_open() and fb_release() to
1626 * check that no processes are using the device.
1627 */
1628
1629 int
1630 unregister_framebuffer(struct fb_info *fb_info)
1631 {
1632 struct fb_event event;
1633 int i, ret = 0;
1634
1635 i = fb_info->node;
1636 if (!registered_fb[i]) {
1637 ret = -EINVAL;
1638 goto done;
1639 }
1640
1641
1642 if (!lock_fb_info(fb_info))
1643 return -ENODEV;
1644 event.info = fb_info;
1645 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1646 unlock_fb_info(fb_info);
1647
1648 if (ret) {
1649 ret = -EINVAL;
1650 goto done;
1651 }
1652
1653 if (fb_info->pixmap.addr &&
1654 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1655 kfree(fb_info->pixmap.addr);
1656 fb_destroy_modelist(&fb_info->modelist);
1657 registered_fb[i]=NULL;
1658 num_registered_fb--;
1659 fb_cleanup_device(fb_info);
1660 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1661 event.info = fb_info;
1662 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1663
1664 /* this may free fb info */
1665 if (fb_info->fbops->fb_destroy)
1666 fb_info->fbops->fb_destroy(fb_info);
1667 done:
1668 return ret;
1669 }
1670
1671 /**
1672 * fb_set_suspend - low level driver signals suspend
1673 * @info: framebuffer affected
1674 * @state: 0 = resuming, !=0 = suspending
1675 *
1676 * This is meant to be used by low level drivers to
1677 * signal suspend/resume to the core & clients.
1678 * It must be called with the console semaphore held
1679 */
1680 void fb_set_suspend(struct fb_info *info, int state)
1681 {
1682 struct fb_event event;
1683
1684 if (!lock_fb_info(info))
1685 return;
1686 event.info = info;
1687 if (state) {
1688 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1689 info->state = FBINFO_STATE_SUSPENDED;
1690 } else {
1691 info->state = FBINFO_STATE_RUNNING;
1692 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1693 }
1694 unlock_fb_info(info);
1695 }
1696
1697 /**
1698 * fbmem_init - init frame buffer subsystem
1699 *
1700 * Initialize the frame buffer subsystem.
1701 *
1702 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1703 *
1704 */
1705
1706 static int __init
1707 fbmem_init(void)
1708 {
1709 proc_create("fb", 0, NULL, &fb_proc_fops);
1710
1711 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1712 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1713
1714 fb_class = class_create(THIS_MODULE, "graphics");
1715 if (IS_ERR(fb_class)) {
1716 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1717 fb_class = NULL;
1718 }
1719 return 0;
1720 }
1721
1722 #ifdef MODULE
1723 module_init(fbmem_init);
1724 static void __exit
1725 fbmem_exit(void)
1726 {
1727 remove_proc_entry("fb", NULL);
1728 class_destroy(fb_class);
1729 unregister_chrdev(FB_MAJOR, "fb");
1730 }
1731
1732 module_exit(fbmem_exit);
1733 MODULE_LICENSE("GPL");
1734 MODULE_DESCRIPTION("Framebuffer base");
1735 #else
1736 subsys_initcall(fbmem_init);
1737 #endif
1738
1739 int fb_new_modelist(struct fb_info *info)
1740 {
1741 struct fb_event event;
1742 struct fb_var_screeninfo var = info->var;
1743 struct list_head *pos, *n;
1744 struct fb_modelist *modelist;
1745 struct fb_videomode *m, mode;
1746 int err = 1;
1747
1748 list_for_each_safe(pos, n, &info->modelist) {
1749 modelist = list_entry(pos, struct fb_modelist, list);
1750 m = &modelist->mode;
1751 fb_videomode_to_var(&var, m);
1752 var.activate = FB_ACTIVATE_TEST;
1753 err = fb_set_var(info, &var);
1754 fb_var_to_videomode(&mode, &var);
1755 if (err || !fb_mode_is_equal(m, &mode)) {
1756 list_del(pos);
1757 kfree(pos);
1758 }
1759 }
1760
1761 err = 1;
1762
1763 if (!list_empty(&info->modelist)) {
1764 if (!lock_fb_info(info))
1765 return -ENODEV;
1766 event.info = info;
1767 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1768 unlock_fb_info(info);
1769 }
1770
1771 return err;
1772 }
1773
1774 static char *video_options[FB_MAX] __read_mostly;
1775 static int ofonly __read_mostly;
1776
1777 /**
1778 * fb_get_options - get kernel boot parameters
1779 * @name: framebuffer name as it would appear in
1780 * the boot parameter line
1781 * (video=<name>:<options>)
1782 * @option: the option will be stored here
1783 *
1784 * NOTE: Needed to maintain backwards compatibility
1785 */
1786 int fb_get_options(char *name, char **option)
1787 {
1788 char *opt, *options = NULL;
1789 int retval = 0;
1790 int name_len = strlen(name), i;
1791
1792 if (name_len && ofonly && strncmp(name, "offb", 4))
1793 retval = 1;
1794
1795 if (name_len && !retval) {
1796 for (i = 0; i < FB_MAX; i++) {
1797 if (video_options[i] == NULL)
1798 continue;
1799 if (!video_options[i][0])
1800 continue;
1801 opt = video_options[i];
1802 if (!strncmp(name, opt, name_len) &&
1803 opt[name_len] == ':')
1804 options = opt + name_len + 1;
1805 }
1806 }
1807 if (options && !strncmp(options, "off", 3))
1808 retval = 1;
1809
1810 if (option)
1811 *option = options;
1812
1813 return retval;
1814 }
1815
1816 #ifndef MODULE
1817 /**
1818 * video_setup - process command line options
1819 * @options: string of options
1820 *
1821 * Process command line options for frame buffer subsystem.
1822 *
1823 * NOTE: This function is a __setup and __init function.
1824 * It only stores the options. Drivers have to call
1825 * fb_get_options() as necessary.
1826 *
1827 * Returns zero.
1828 *
1829 */
1830 static int __init video_setup(char *options)
1831 {
1832 int i, global = 0;
1833
1834 if (!options || !*options)
1835 global = 1;
1836
1837 if (!global && !strncmp(options, "ofonly", 6)) {
1838 ofonly = 1;
1839 global = 1;
1840 }
1841
1842 if (!global && !strchr(options, ':')) {
1843 fb_mode_option = options;
1844 global = 1;
1845 }
1846
1847 if (!global) {
1848 for (i = 0; i < FB_MAX; i++) {
1849 if (video_options[i] == NULL) {
1850 video_options[i] = options;
1851 break;
1852 }
1853
1854 }
1855 }
1856
1857 return 1;
1858 }
1859 __setup("video=", video_setup);
1860 #endif
1861
1862 /*
1863 * Visible symbols for modules
1864 */
1865
1866 EXPORT_SYMBOL(register_framebuffer);
1867 EXPORT_SYMBOL(unregister_framebuffer);
1868 EXPORT_SYMBOL(num_registered_fb);
1869 EXPORT_SYMBOL(registered_fb);
1870 EXPORT_SYMBOL(fb_show_logo);
1871 EXPORT_SYMBOL(fb_set_var);
1872 EXPORT_SYMBOL(fb_blank);
1873 EXPORT_SYMBOL(fb_pan_display);
1874 EXPORT_SYMBOL(fb_get_buffer_offset);
1875 EXPORT_SYMBOL(fb_set_suspend);
1876 EXPORT_SYMBOL(fb_get_options);
1877
1878 MODULE_LICENSE("GPL");
Tomato firmware and modifications.