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Source at commit 03e316d4649e66a9c6cd5b65c1d6dff1c8605651 created 14 years 2 months ago. By Lars-Peter Clausen, From 2d00c901d3a438c6f750f8b13b329845775ec3b5 Mon Sep 17 00:00:00 2001 Subject: [PATCH] /opt/Projects/openwrt/target/linux/xburst/patches-2.6.31/420-fb-notifier-pre-post.patch | |
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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 | /* FIXME: logo_ex supports only truecolor fb. */ |
519 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) |
520 | fb_logo_ex_num = 0; |
521 | |
522 | for (i = 0; i < fb_logo_ex_num; i++) { |
523 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
524 | fb_logo_ex[i].logo = NULL; |
525 | continue; |
526 | } |
527 | height += fb_logo_ex[i].logo->height; |
528 | if (height > yres) { |
529 | height -= fb_logo_ex[i].logo->height; |
530 | fb_logo_ex_num = i; |
531 | break; |
532 | } |
533 | } |
534 | return height; |
535 | } |
536 | |
537 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
538 | { |
539 | unsigned int i; |
540 | |
541 | for (i = 0; i < fb_logo_ex_num; i++) |
542 | y += fb_show_logo_line(info, rotate, |
543 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); |
544 | |
545 | return y; |
546 | } |
547 | |
548 | #else /* !CONFIG_FB_LOGO_EXTRA */ |
549 | |
550 | static inline int fb_prepare_extra_logos(struct fb_info *info, |
551 | unsigned int height, |
552 | unsigned int yres) |
553 | { |
554 | return height; |
555 | } |
556 | |
557 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
558 | { |
559 | return y; |
560 | } |
561 | |
562 | #endif /* CONFIG_FB_LOGO_EXTRA */ |
563 | |
564 | |
565 | int fb_prepare_logo(struct fb_info *info, int rotate) |
566 | { |
567 | int depth = fb_get_color_depth(&info->var, &info->fix); |
568 | unsigned int yres; |
569 | |
570 | memset(&fb_logo, 0, sizeof(struct logo_data)); |
571 | |
572 | if (info->flags & FBINFO_MISC_TILEBLITTING || |
573 | info->flags & FBINFO_MODULE) |
574 | return 0; |
575 | |
576 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { |
577 | depth = info->var.blue.length; |
578 | if (info->var.red.length < depth) |
579 | depth = info->var.red.length; |
580 | if (info->var.green.length < depth) |
581 | depth = info->var.green.length; |
582 | } |
583 | |
584 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
585 | /* assume console colormap */ |
586 | depth = 4; |
587 | } |
588 | |
589 | /* Return if no suitable logo was found */ |
590 | fb_logo.logo = fb_find_logo(depth); |
591 | |
592 | if (!fb_logo.logo) { |
593 | return 0; |
594 | } |
595 | |
596 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
597 | yres = info->var.yres; |
598 | else |
599 | yres = info->var.xres; |
600 | |
601 | if (fb_logo.logo->height > yres) { |
602 | fb_logo.logo = NULL; |
603 | return 0; |
604 | } |
605 | |
606 | /* What depth we asked for might be different from what we get */ |
607 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) |
608 | fb_logo.depth = 8; |
609 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) |
610 | fb_logo.depth = 4; |
611 | else |
612 | fb_logo.depth = 1; |
613 | |
614 | |
615 | if (fb_logo.depth > 4 && depth > 4) { |
616 | switch (info->fix.visual) { |
617 | case FB_VISUAL_TRUECOLOR: |
618 | fb_logo.needs_truepalette = 1; |
619 | break; |
620 | case FB_VISUAL_DIRECTCOLOR: |
621 | fb_logo.needs_directpalette = 1; |
622 | fb_logo.needs_cmapreset = 1; |
623 | break; |
624 | case FB_VISUAL_PSEUDOCOLOR: |
625 | fb_logo.needs_cmapreset = 1; |
626 | break; |
627 | } |
628 | } |
629 | |
630 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
631 | } |
632 | |
633 | int fb_show_logo(struct fb_info *info, int rotate) |
634 | { |
635 | int y; |
636 | |
637 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, |
638 | num_online_cpus()); |
639 | y = fb_show_extra_logos(info, y, rotate); |
640 | |
641 | return y; |
642 | } |
643 | #else |
644 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
645 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } |
646 | #endif /* CONFIG_LOGO */ |
647 | |
648 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
649 | { |
650 | return (*pos < FB_MAX) ? pos : NULL; |
651 | } |
652 | |
653 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) |
654 | { |
655 | (*pos)++; |
656 | return (*pos < FB_MAX) ? pos : NULL; |
657 | } |
658 | |
659 | static void fb_seq_stop(struct seq_file *m, void *v) |
660 | { |
661 | } |
662 | |
663 | static int fb_seq_show(struct seq_file *m, void *v) |
664 | { |
665 | int i = *(loff_t *)v; |
666 | struct fb_info *fi = registered_fb[i]; |
667 | |
668 | if (fi) |
669 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); |
670 | return 0; |
671 | } |
672 | |
673 | static const struct seq_operations proc_fb_seq_ops = { |
674 | .start = fb_seq_start, |
675 | .next = fb_seq_next, |
676 | .stop = fb_seq_stop, |
677 | .show = fb_seq_show, |
678 | }; |
679 | |
680 | static int proc_fb_open(struct inode *inode, struct file *file) |
681 | { |
682 | return seq_open(file, &proc_fb_seq_ops); |
683 | } |
684 | |
685 | static const struct file_operations fb_proc_fops = { |
686 | .owner = THIS_MODULE, |
687 | .open = proc_fb_open, |
688 | .read = seq_read, |
689 | .llseek = seq_lseek, |
690 | .release = seq_release, |
691 | }; |
692 | |
693 | static ssize_t |
694 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
695 | { |
696 | unsigned long p = *ppos; |
697 | struct inode *inode = file->f_path.dentry->d_inode; |
698 | int fbidx = iminor(inode); |
699 | struct fb_info *info = registered_fb[fbidx]; |
700 | u32 *buffer, *dst; |
701 | u32 __iomem *src; |
702 | int c, i, cnt = 0, err = 0; |
703 | unsigned long total_size; |
704 | |
705 | if (!info || ! info->screen_base) |
706 | return -ENODEV; |
707 | |
708 | if (info->state != FBINFO_STATE_RUNNING) |
709 | return -EPERM; |
710 | |
711 | if (info->fbops->fb_read) |
712 | return info->fbops->fb_read(info, buf, count, ppos); |
713 | |
714 | total_size = info->screen_size; |
715 | |
716 | if (total_size == 0) |
717 | total_size = info->fix.smem_len; |
718 | |
719 | if (p >= total_size) |
720 | return 0; |
721 | |
722 | if (count >= total_size) |
723 | count = total_size; |
724 | |
725 | if (count + p > total_size) |
726 | count = total_size - p; |
727 | |
728 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
729 | GFP_KERNEL); |
730 | if (!buffer) |
731 | return -ENOMEM; |
732 | |
733 | src = (u32 __iomem *) (info->screen_base + p); |
734 | |
735 | if (info->fbops->fb_sync) |
736 | info->fbops->fb_sync(info); |
737 | |
738 | while (count) { |
739 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
740 | dst = buffer; |
741 | for (i = c >> 2; i--; ) |
742 | *dst++ = fb_readl(src++); |
743 | if (c & 3) { |
744 | u8 *dst8 = (u8 *) dst; |
745 | u8 __iomem *src8 = (u8 __iomem *) src; |
746 | |
747 | for (i = c & 3; i--;) |
748 | *dst8++ = fb_readb(src8++); |
749 | |
750 | src = (u32 __iomem *) src8; |
751 | } |
752 | |
753 | if (copy_to_user(buf, buffer, c)) { |
754 | err = -EFAULT; |
755 | break; |
756 | } |
757 | *ppos += c; |
758 | buf += c; |
759 | cnt += c; |
760 | count -= c; |
761 | } |
762 | |
763 | kfree(buffer); |
764 | |
765 | return (err) ? err : cnt; |
766 | } |
767 | |
768 | static ssize_t |
769 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
770 | { |
771 | unsigned long p = *ppos; |
772 | struct inode *inode = file->f_path.dentry->d_inode; |
773 | int fbidx = iminor(inode); |
774 | struct fb_info *info = registered_fb[fbidx]; |
775 | u32 *buffer, *src; |
776 | u32 __iomem *dst; |
777 | int c, i, cnt = 0, err = 0; |
778 | unsigned long total_size; |
779 | |
780 | if (!info || !info->screen_base) |
781 | return -ENODEV; |
782 | |
783 | if (info->state != FBINFO_STATE_RUNNING) |
784 | return -EPERM; |
785 | |
786 | if (info->fbops->fb_write) |
787 | return info->fbops->fb_write(info, buf, count, ppos); |
788 | |
789 | total_size = info->screen_size; |
790 | |
791 | if (total_size == 0) |
792 | total_size = info->fix.smem_len; |
793 | |
794 | if (p > total_size) |
795 | return -EFBIG; |
796 | |
797 | if (count > total_size) { |
798 | err = -EFBIG; |
799 | count = total_size; |
800 | } |
801 | |
802 | if (count + p > total_size) { |
803 | if (!err) |
804 | err = -ENOSPC; |
805 | |
806 | count = total_size - p; |
807 | } |
808 | |
809 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
810 | GFP_KERNEL); |
811 | if (!buffer) |
812 | return -ENOMEM; |
813 | |
814 | dst = (u32 __iomem *) (info->screen_base + p); |
815 | |
816 | if (info->fbops->fb_sync) |
817 | info->fbops->fb_sync(info); |
818 | |
819 | while (count) { |
820 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
821 | src = buffer; |
822 | |
823 | if (copy_from_user(src, buf, c)) { |
824 | err = -EFAULT; |
825 | break; |
826 | } |
827 | |
828 | for (i = c >> 2; i--; ) |
829 | fb_writel(*src++, dst++); |
830 | |
831 | if (c & 3) { |
832 | u8 *src8 = (u8 *) src; |
833 | u8 __iomem *dst8 = (u8 __iomem *) dst; |
834 | |
835 | for (i = c & 3; i--; ) |
836 | fb_writeb(*src8++, dst8++); |
837 | |
838 | dst = (u32 __iomem *) dst8; |
839 | } |
840 | |
841 | *ppos += c; |
842 | buf += c; |
843 | cnt += c; |
844 | count -= c; |
845 | } |
846 | |
847 | kfree(buffer); |
848 | |
849 | return (cnt) ? cnt : err; |
850 | } |
851 | |
852 | int |
853 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) |
854 | { |
855 | struct fb_fix_screeninfo *fix = &info->fix; |
856 | unsigned int yres = info->var.yres; |
857 | int err = 0; |
858 | |
859 | if (var->yoffset > 0) { |
860 | if (var->vmode & FB_VMODE_YWRAP) { |
861 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) |
862 | err = -EINVAL; |
863 | else |
864 | yres = 0; |
865 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) |
866 | err = -EINVAL; |
867 | } |
868 | |
869 | if (var->xoffset > 0 && (!fix->xpanstep || |
870 | (var->xoffset % fix->xpanstep))) |
871 | err = -EINVAL; |
872 | |
873 | if (err || !info->fbops->fb_pan_display || |
874 | var->yoffset > info->var.yres_virtual - yres || |
875 | var->xoffset > info->var.xres_virtual - info->var.xres) |
876 | return -EINVAL; |
877 | |
878 | if ((err = info->fbops->fb_pan_display(var, info))) |
879 | return err; |
880 | info->var.xoffset = var->xoffset; |
881 | info->var.yoffset = var->yoffset; |
882 | if (var->vmode & FB_VMODE_YWRAP) |
883 | info->var.vmode |= FB_VMODE_YWRAP; |
884 | else |
885 | info->var.vmode &= ~FB_VMODE_YWRAP; |
886 | return 0; |
887 | } |
888 | |
889 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
890 | u32 activate) |
891 | { |
892 | struct fb_event event; |
893 | struct fb_blit_caps caps, fbcaps; |
894 | int err = 0; |
895 | |
896 | memset(&caps, 0, sizeof(caps)); |
897 | memset(&fbcaps, 0, sizeof(fbcaps)); |
898 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; |
899 | event.info = info; |
900 | event.data = ∩︀ |
901 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); |
902 | info->fbops->fb_get_caps(info, &fbcaps, var); |
903 | |
904 | if (((fbcaps.x ^ caps.x) & caps.x) || |
905 | ((fbcaps.y ^ caps.y) & caps.y) || |
906 | (fbcaps.len < caps.len)) |
907 | err = -EINVAL; |
908 | |
909 | return err; |
910 | } |
911 | |
912 | int |
913 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) |
914 | { |
915 | int flags = info->flags; |
916 | int ret = 0; |
917 | |
918 | if (var->activate & FB_ACTIVATE_INV_MODE) { |
919 | struct fb_videomode mode1, mode2; |
920 | |
921 | fb_var_to_videomode(&mode1, var); |
922 | fb_var_to_videomode(&mode2, &info->var); |
923 | /* make sure we don't delete the videomode of current var */ |
924 | ret = fb_mode_is_equal(&mode1, &mode2); |
925 | |
926 | if (!ret) { |
927 | struct fb_event event; |
928 | |
929 | event.info = info; |
930 | event.data = &mode1; |
931 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
932 | } |
933 | |
934 | if (!ret) |
935 | fb_delete_videomode(&mode1, &info->modelist); |
936 | |
937 | |
938 | ret = (ret) ? -EINVAL : 0; |
939 | goto done; |
940 | } |
941 | |
942 | if ((var->activate & FB_ACTIVATE_FORCE) || |
943 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { |
944 | u32 activate = var->activate; |
945 | |
946 | if (!info->fbops->fb_check_var) { |
947 | *var = info->var; |
948 | goto done; |
949 | } |
950 | |
951 | ret = info->fbops->fb_check_var(var, info); |
952 | |
953 | if (ret) |
954 | goto done; |
955 | |
956 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { |
957 | struct fb_var_screeninfo old_var; |
958 | struct fb_videomode mode; |
959 | |
960 | if (info->fbops->fb_get_caps) { |
961 | ret = fb_check_caps(info, var, activate); |
962 | |
963 | if (ret) |
964 | goto done; |
965 | } |
966 | |
967 | old_var = info->var; |
968 | info->var = *var; |
969 | |
970 | if (info->fbops->fb_set_par) { |
971 | ret = info->fbops->fb_set_par(info); |
972 | |
973 | if (ret) { |
974 | info->var = old_var; |
975 | printk(KERN_WARNING "detected " |
976 | "fb_set_par error, " |
977 | "error code: %d\n", ret); |
978 | goto done; |
979 | } |
980 | } |
981 | |
982 | fb_pan_display(info, &info->var); |
983 | fb_set_cmap(&info->cmap, info); |
984 | fb_var_to_videomode(&mode, &info->var); |
985 | |
986 | if (info->modelist.prev && info->modelist.next && |
987 | !list_empty(&info->modelist)) |
988 | ret = fb_add_videomode(&mode, &info->modelist); |
989 | |
990 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
991 | struct fb_event event; |
992 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
993 | FB_EVENT_MODE_CHANGE_ALL : |
994 | FB_EVENT_MODE_CHANGE; |
995 | |
996 | info->flags &= ~FBINFO_MISC_USEREVENT; |
997 | event.info = info; |
998 | event.data = &mode; |
999 | fb_notifier_call_chain(evnt, &event); |
1000 | } |
1001 | } |
1002 | } |
1003 | |
1004 | done: |
1005 | return ret; |
1006 | } |
1007 | |
1008 | int |
1009 | fb_blank(struct fb_info *info, int blank) |
1010 | { |
1011 | int ret = 0; |
1012 | |
1013 | if (blank > FB_BLANK_POWERDOWN) |
1014 | blank = FB_BLANK_POWERDOWN; |
1015 | |
1016 | if (info->fbops->fb_blank && blank == FB_BLANK_UNBLANK) |
1017 | ret = info->fbops->fb_blank(blank, info); |
1018 | |
1019 | if (!ret) { |
1020 | struct fb_event event; |
1021 | |
1022 | event.info = info; |
1023 | event.data = ␣ |
1024 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1025 | } |
1026 | |
1027 | if (info->fbops->fb_blank && blank != FB_BLANK_UNBLANK) |
1028 | ret = info->fbops->fb_blank(blank, info); |
1029 | |
1030 | |
1031 | return ret; |
1032 | } |
1033 | |
1034 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1035 | unsigned long arg) |
1036 | { |
1037 | struct fb_ops *fb; |
1038 | struct fb_var_screeninfo var; |
1039 | struct fb_fix_screeninfo fix; |
1040 | struct fb_con2fbmap con2fb; |
1041 | struct fb_cmap cmap_from; |
1042 | struct fb_cmap_user cmap; |
1043 | struct fb_event event; |
1044 | void __user *argp = (void __user *)arg; |
1045 | long ret = 0; |
1046 | |
1047 | switch (cmd) { |
1048 | case FBIOGET_VSCREENINFO: |
1049 | if (!lock_fb_info(info)) |
1050 | return -ENODEV; |
1051 | var = info->var; |
1052 | unlock_fb_info(info); |
1053 | |
1054 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; |
1055 | break; |
1056 | case FBIOPUT_VSCREENINFO: |
1057 | if (copy_from_user(&var, argp, sizeof(var))) |
1058 | return -EFAULT; |
1059 | if (!lock_fb_info(info)) |
1060 | return -ENODEV; |
1061 | acquire_console_sem(); |
1062 | info->flags |= FBINFO_MISC_USEREVENT; |
1063 | ret = fb_set_var(info, &var); |
1064 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1065 | release_console_sem(); |
1066 | unlock_fb_info(info); |
1067 | if (!ret && copy_to_user(argp, &var, sizeof(var))) |
1068 | ret = -EFAULT; |
1069 | break; |
1070 | case FBIOGET_FSCREENINFO: |
1071 | if (!lock_fb_info(info)) |
1072 | return -ENODEV; |
1073 | fix = info->fix; |
1074 | unlock_fb_info(info); |
1075 | |
1076 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; |
1077 | break; |
1078 | case FBIOPUTCMAP: |
1079 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
1080 | return -EFAULT; |
1081 | ret = fb_set_user_cmap(&cmap, info); |
1082 | break; |
1083 | case FBIOGETCMAP: |
1084 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
1085 | return -EFAULT; |
1086 | if (!lock_fb_info(info)) |
1087 | return -ENODEV; |
1088 | cmap_from = info->cmap; |
1089 | unlock_fb_info(info); |
1090 | ret = fb_cmap_to_user(&cmap_from, &cmap); |
1091 | break; |
1092 | case FBIOPAN_DISPLAY: |
1093 | if (copy_from_user(&var, argp, sizeof(var))) |
1094 | return -EFAULT; |
1095 | if (!lock_fb_info(info)) |
1096 | return -ENODEV; |
1097 | acquire_console_sem(); |
1098 | ret = fb_pan_display(info, &var); |
1099 | release_console_sem(); |
1100 | unlock_fb_info(info); |
1101 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1102 | return -EFAULT; |
1103 | break; |
1104 | case FBIO_CURSOR: |
1105 | ret = -EINVAL; |
1106 | break; |
1107 | case FBIOGET_CON2FBMAP: |
1108 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1109 | return -EFAULT; |
1110 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1111 | return -EINVAL; |
1112 | con2fb.framebuffer = -1; |
1113 | event.data = &con2fb; |
1114 | if (!lock_fb_info(info)) |
1115 | return -ENODEV; |
1116 | event.info = info; |
1117 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1118 | unlock_fb_info(info); |
1119 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
1120 | break; |
1121 | case FBIOPUT_CON2FBMAP: |
1122 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1123 | return -EFAULT; |
1124 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1125 | return -EINVAL; |
1126 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) |
1127 | return -EINVAL; |
1128 | if (!registered_fb[con2fb.framebuffer]) |
1129 | request_module("fb%d", con2fb.framebuffer); |
1130 | if (!registered_fb[con2fb.framebuffer]) { |
1131 | ret = -EINVAL; |
1132 | break; |
1133 | } |
1134 | event.data = &con2fb; |
1135 | if (!lock_fb_info(info)) |
1136 | return -ENODEV; |
1137 | event.info = info; |
1138 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
1139 | unlock_fb_info(info); |
1140 | break; |
1141 | case FBIOBLANK: |
1142 | if (!lock_fb_info(info)) |
1143 | return -ENODEV; |
1144 | acquire_console_sem(); |
1145 | info->flags |= FBINFO_MISC_USEREVENT; |
1146 | ret = fb_blank(info, arg); |
1147 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1148 | release_console_sem(); |
1149 | unlock_fb_info(info); |
1150 | break; |
1151 | default: |
1152 | if (!lock_fb_info(info)) |
1153 | return -ENODEV; |
1154 | fb = info->fbops; |
1155 | if (fb->fb_ioctl) |
1156 | ret = fb->fb_ioctl(info, cmd, arg); |
1157 | else |
1158 | ret = -ENOTTY; |
1159 | unlock_fb_info(info); |
1160 | } |
1161 | return ret; |
1162 | } |
1163 | |
1164 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1165 | { |
1166 | struct inode *inode = file->f_path.dentry->d_inode; |
1167 | int fbidx = iminor(inode); |
1168 | struct fb_info *info = registered_fb[fbidx]; |
1169 | |
1170 | return do_fb_ioctl(info, cmd, arg); |
1171 | } |
1172 | |
1173 | #ifdef CONFIG_COMPAT |
1174 | struct fb_fix_screeninfo32 { |
1175 | char id[16]; |
1176 | compat_caddr_t smem_start; |
1177 | u32 smem_len; |
1178 | u32 type; |
1179 | u32 type_aux; |
1180 | u32 visual; |
1181 | u16 xpanstep; |
1182 | u16 ypanstep; |
1183 | u16 ywrapstep; |
1184 | u32 line_length; |
1185 | compat_caddr_t mmio_start; |
1186 | u32 mmio_len; |
1187 | u32 accel; |
1188 | u16 reserved[3]; |
1189 | }; |
1190 | |
1191 | struct fb_cmap32 { |
1192 | u32 start; |
1193 | u32 len; |
1194 | compat_caddr_t red; |
1195 | compat_caddr_t green; |
1196 | compat_caddr_t blue; |
1197 | compat_caddr_t transp; |
1198 | }; |
1199 | |
1200 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1201 | unsigned long arg) |
1202 | { |
1203 | struct fb_cmap_user __user *cmap; |
1204 | struct fb_cmap32 __user *cmap32; |
1205 | __u32 data; |
1206 | int err; |
1207 | |
1208 | cmap = compat_alloc_user_space(sizeof(*cmap)); |
1209 | cmap32 = compat_ptr(arg); |
1210 | |
1211 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) |
1212 | return -EFAULT; |
1213 | |
1214 | if (get_user(data, &cmap32->red) || |
1215 | put_user(compat_ptr(data), &cmap->red) || |
1216 | get_user(data, &cmap32->green) || |
1217 | put_user(compat_ptr(data), &cmap->green) || |
1218 | get_user(data, &cmap32->blue) || |
1219 | put_user(compat_ptr(data), &cmap->blue) || |
1220 | get_user(data, &cmap32->transp) || |
1221 | put_user(compat_ptr(data), &cmap->transp)) |
1222 | return -EFAULT; |
1223 | |
1224 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
1225 | |
1226 | if (!err) { |
1227 | if (copy_in_user(&cmap32->start, |
1228 | &cmap->start, |
1229 | 2 * sizeof(__u32))) |
1230 | err = -EFAULT; |
1231 | } |
1232 | return err; |
1233 | } |
1234 | |
1235 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, |
1236 | struct fb_fix_screeninfo32 __user *fix32) |
1237 | { |
1238 | __u32 data; |
1239 | int err; |
1240 | |
1241 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); |
1242 | |
1243 | data = (__u32) (unsigned long) fix->smem_start; |
1244 | err |= put_user(data, &fix32->smem_start); |
1245 | |
1246 | err |= put_user(fix->smem_len, &fix32->smem_len); |
1247 | err |= put_user(fix->type, &fix32->type); |
1248 | err |= put_user(fix->type_aux, &fix32->type_aux); |
1249 | err |= put_user(fix->visual, &fix32->visual); |
1250 | err |= put_user(fix->xpanstep, &fix32->xpanstep); |
1251 | err |= put_user(fix->ypanstep, &fix32->ypanstep); |
1252 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); |
1253 | err |= put_user(fix->line_length, &fix32->line_length); |
1254 | |
1255 | data = (__u32) (unsigned long) fix->mmio_start; |
1256 | err |= put_user(data, &fix32->mmio_start); |
1257 | |
1258 | err |= put_user(fix->mmio_len, &fix32->mmio_len); |
1259 | err |= put_user(fix->accel, &fix32->accel); |
1260 | err |= copy_to_user(fix32->reserved, fix->reserved, |
1261 | sizeof(fix->reserved)); |
1262 | |
1263 | return err; |
1264 | } |
1265 | |
1266 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1267 | unsigned long arg) |
1268 | { |
1269 | mm_segment_t old_fs; |
1270 | struct fb_fix_screeninfo fix; |
1271 | struct fb_fix_screeninfo32 __user *fix32; |
1272 | int err; |
1273 | |
1274 | fix32 = compat_ptr(arg); |
1275 | |
1276 | old_fs = get_fs(); |
1277 | set_fs(KERNEL_DS); |
1278 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
1279 | set_fs(old_fs); |
1280 | |
1281 | if (!err) |
1282 | err = do_fscreeninfo_to_user(&fix, fix32); |
1283 | |
1284 | return err; |
1285 | } |
1286 | |
1287 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1288 | unsigned long arg) |
1289 | { |
1290 | struct inode *inode = file->f_path.dentry->d_inode; |
1291 | int fbidx = iminor(inode); |
1292 | struct fb_info *info = registered_fb[fbidx]; |
1293 | struct fb_ops *fb = info->fbops; |
1294 | long ret = -ENOIOCTLCMD; |
1295 | |
1296 | switch(cmd) { |
1297 | case FBIOGET_VSCREENINFO: |
1298 | case FBIOPUT_VSCREENINFO: |
1299 | case FBIOPAN_DISPLAY: |
1300 | case FBIOGET_CON2FBMAP: |
1301 | case FBIOPUT_CON2FBMAP: |
1302 | arg = (unsigned long) compat_ptr(arg); |
1303 | case FBIOBLANK: |
1304 | ret = do_fb_ioctl(info, cmd, arg); |
1305 | break; |
1306 | |
1307 | case FBIOGET_FSCREENINFO: |
1308 | ret = fb_get_fscreeninfo(info, cmd, arg); |
1309 | break; |
1310 | |
1311 | case FBIOGETCMAP: |
1312 | case FBIOPUTCMAP: |
1313 | ret = fb_getput_cmap(info, cmd, arg); |
1314 | break; |
1315 | |
1316 | default: |
1317 | if (fb->fb_compat_ioctl) |
1318 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
1319 | break; |
1320 | } |
1321 | return ret; |
1322 | } |
1323 | #endif |
1324 | |
1325 | static int |
1326 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1327 | { |
1328 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1329 | struct fb_info *info = registered_fb[fbidx]; |
1330 | struct fb_ops *fb = info->fbops; |
1331 | unsigned long off; |
1332 | unsigned long start; |
1333 | u32 len; |
1334 | |
1335 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) |
1336 | return -EINVAL; |
1337 | off = vma->vm_pgoff << PAGE_SHIFT; |
1338 | if (!fb) |
1339 | return -ENODEV; |
1340 | mutex_lock(&info->mm_lock); |
1341 | if (fb->fb_mmap) { |
1342 | int res; |
1343 | res = fb->fb_mmap(info, vma); |
1344 | mutex_unlock(&info->mm_lock); |
1345 | return res; |
1346 | } |
1347 | |
1348 | /* frame buffer memory */ |
1349 | start = info->fix.smem_start; |
1350 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); |
1351 | if (off >= len) { |
1352 | /* memory mapped io */ |
1353 | off -= len; |
1354 | if (info->var.accel_flags) { |
1355 | mutex_unlock(&info->mm_lock); |
1356 | return -EINVAL; |
1357 | } |
1358 | start = info->fix.mmio_start; |
1359 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); |
1360 | } |
1361 | mutex_unlock(&info->mm_lock); |
1362 | start &= PAGE_MASK; |
1363 | if ((vma->vm_end - vma->vm_start + off) > len) |
1364 | return -EINVAL; |
1365 | off += start; |
1366 | vma->vm_pgoff = off >> PAGE_SHIFT; |
1367 | /* This is an IO map - tell maydump to skip this VMA */ |
1368 | vma->vm_flags |= VM_IO | VM_RESERVED; |
1369 | fb_pgprotect(file, vma, off); |
1370 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1371 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
1372 | return -EAGAIN; |
1373 | return 0; |
1374 | } |
1375 | |
1376 | static int |
1377 | fb_open(struct inode *inode, struct file *file) |
1378 | __acquires(&info->lock) |
1379 | __releases(&info->lock) |
1380 | { |
1381 | int fbidx = iminor(inode); |
1382 | struct fb_info *info; |
1383 | int res = 0; |
1384 | |
1385 | if (fbidx >= FB_MAX) |
1386 | return -ENODEV; |
1387 | info = registered_fb[fbidx]; |
1388 | if (!info) |
1389 | request_module("fb%d", fbidx); |
1390 | info = registered_fb[fbidx]; |
1391 | if (!info) |
1392 | return -ENODEV; |
1393 | mutex_lock(&info->lock); |
1394 | if (!try_module_get(info->fbops->owner)) { |
1395 | res = -ENODEV; |
1396 | goto out; |
1397 | } |
1398 | file->private_data = info; |
1399 | if (info->fbops->fb_open) { |
1400 | res = info->fbops->fb_open(info,1); |
1401 | if (res) |
1402 | module_put(info->fbops->owner); |
1403 | } |
1404 | #ifdef CONFIG_FB_DEFERRED_IO |
1405 | if (info->fbdefio) |
1406 | fb_deferred_io_open(info, inode, file); |
1407 | #endif |
1408 | out: |
1409 | mutex_unlock(&info->lock); |
1410 | return res; |
1411 | } |
1412 | |
1413 | static int |
1414 | fb_release(struct inode *inode, struct file *file) |
1415 | __acquires(&info->lock) |
1416 | __releases(&info->lock) |
1417 | { |
1418 | struct fb_info * const info = file->private_data; |
1419 | |
1420 | mutex_lock(&info->lock); |
1421 | if (info->fbops->fb_release) |
1422 | info->fbops->fb_release(info,1); |
1423 | module_put(info->fbops->owner); |
1424 | mutex_unlock(&info->lock); |
1425 | return 0; |
1426 | } |
1427 | |
1428 | static const struct file_operations fb_fops = { |
1429 | .owner = THIS_MODULE, |
1430 | .read = fb_read, |
1431 | .write = fb_write, |
1432 | .unlocked_ioctl = fb_ioctl, |
1433 | #ifdef CONFIG_COMPAT |
1434 | .compat_ioctl = fb_compat_ioctl, |
1435 | #endif |
1436 | .mmap = fb_mmap, |
1437 | .open = fb_open, |
1438 | .release = fb_release, |
1439 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA |
1440 | .get_unmapped_area = get_fb_unmapped_area, |
1441 | #endif |
1442 | #ifdef CONFIG_FB_DEFERRED_IO |
1443 | .fsync = fb_deferred_io_fsync, |
1444 | #endif |
1445 | }; |
1446 | |
1447 | struct class *fb_class; |
1448 | EXPORT_SYMBOL(fb_class); |
1449 | |
1450 | static int fb_check_foreignness(struct fb_info *fi) |
1451 | { |
1452 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; |
1453 | |
1454 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; |
1455 | |
1456 | #ifdef __BIG_ENDIAN |
1457 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; |
1458 | #else |
1459 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; |
1460 | #endif /* __BIG_ENDIAN */ |
1461 | |
1462 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { |
1463 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " |
1464 | "support this framebuffer\n", fi->fix.id); |
1465 | return -ENOSYS; |
1466 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { |
1467 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " |
1468 | "support this framebuffer\n", fi->fix.id); |
1469 | return -ENOSYS; |
1470 | } |
1471 | |
1472 | return 0; |
1473 | } |
1474 | |
1475 | static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw) |
1476 | { |
1477 | /* is the generic aperture base the same as the HW one */ |
1478 | if (gen->aperture_base == hw->aperture_base) |
1479 | return true; |
1480 | /* is the generic aperture base inside the hw base->hw base+size */ |
1481 | if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size) |
1482 | return true; |
1483 | return false; |
1484 | } |
1485 | /** |
1486 | * register_framebuffer - registers a frame buffer device |
1487 | * @fb_info: frame buffer info structure |
1488 | * |
1489 | * Registers a frame buffer device @fb_info. |
1490 | * |
1491 | * Returns negative errno on error, or zero for success. |
1492 | * |
1493 | */ |
1494 | |
1495 | int |
1496 | register_framebuffer(struct fb_info *fb_info) |
1497 | { |
1498 | int i; |
1499 | struct fb_event event; |
1500 | struct fb_videomode mode; |
1501 | |
1502 | if (num_registered_fb == FB_MAX) |
1503 | return -ENXIO; |
1504 | |
1505 | if (fb_check_foreignness(fb_info)) |
1506 | return -ENOSYS; |
1507 | |
1508 | /* check all firmware fbs and kick off if the base addr overlaps */ |
1509 | for (i = 0 ; i < FB_MAX; i++) { |
1510 | if (!registered_fb[i]) |
1511 | continue; |
1512 | |
1513 | if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) { |
1514 | if (fb_do_apertures_overlap(registered_fb[i], fb_info)) { |
1515 | printk(KERN_ERR "fb: conflicting fb hw usage " |
1516 | "%s vs %s - removing generic driver\n", |
1517 | fb_info->fix.id, |
1518 | registered_fb[i]->fix.id); |
1519 | unregister_framebuffer(registered_fb[i]); |
1520 | break; |
1521 | } |
1522 | } |
1523 | } |
1524 | |
1525 | num_registered_fb++; |
1526 | for (i = 0 ; i < FB_MAX; i++) |
1527 | if (!registered_fb[i]) |
1528 | break; |
1529 | fb_info->node = i; |
1530 | mutex_init(&fb_info->lock); |
1531 | mutex_init(&fb_info->mm_lock); |
1532 | |
1533 | fb_info->dev = device_create(fb_class, fb_info->device, |
1534 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); |
1535 | if (IS_ERR(fb_info->dev)) { |
1536 | /* Not fatal */ |
1537 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1538 | fb_info->dev = NULL; |
1539 | } else |
1540 | fb_init_device(fb_info); |
1541 | |
1542 | if (fb_info->pixmap.addr == NULL) { |
1543 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); |
1544 | if (fb_info->pixmap.addr) { |
1545 | fb_info->pixmap.size = FBPIXMAPSIZE; |
1546 | fb_info->pixmap.buf_align = 1; |
1547 | fb_info->pixmap.scan_align = 1; |
1548 | fb_info->pixmap.access_align = 32; |
1549 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1550 | } |
1551 | } |
1552 | fb_info->pixmap.offset = 0; |
1553 | |
1554 | if (!fb_info->pixmap.blit_x) |
1555 | fb_info->pixmap.blit_x = ~(u32)0; |
1556 | |
1557 | if (!fb_info->pixmap.blit_y) |
1558 | fb_info->pixmap.blit_y = ~(u32)0; |
1559 | |
1560 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1561 | INIT_LIST_HEAD(&fb_info->modelist); |
1562 | |
1563 | fb_var_to_videomode(&mode, &fb_info->var); |
1564 | fb_add_videomode(&mode, &fb_info->modelist); |
1565 | registered_fb[i] = fb_info; |
1566 | |
1567 | event.info = fb_info; |
1568 | if (!lock_fb_info(fb_info)) |
1569 | return -ENODEV; |
1570 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1571 | unlock_fb_info(fb_info); |
1572 | return 0; |
1573 | } |
1574 | |
1575 | |
1576 | /** |
1577 | * unregister_framebuffer - releases a frame buffer device |
1578 | * @fb_info: frame buffer info structure |
1579 | * |
1580 | * Unregisters a frame buffer device @fb_info. |
1581 | * |
1582 | * Returns negative errno on error, or zero for success. |
1583 | * |
1584 | * This function will also notify the framebuffer console |
1585 | * to release the driver. |
1586 | * |
1587 | * This is meant to be called within a driver's module_exit() |
1588 | * function. If this is called outside module_exit(), ensure |
1589 | * that the driver implements fb_open() and fb_release() to |
1590 | * check that no processes are using the device. |
1591 | */ |
1592 | |
1593 | int |
1594 | unregister_framebuffer(struct fb_info *fb_info) |
1595 | { |
1596 | struct fb_event event; |
1597 | int i, ret = 0; |
1598 | |
1599 | i = fb_info->node; |
1600 | if (!registered_fb[i]) { |
1601 | ret = -EINVAL; |
1602 | goto done; |
1603 | } |
1604 | |
1605 | |
1606 | if (!lock_fb_info(fb_info)) |
1607 | return -ENODEV; |
1608 | event.info = fb_info; |
1609 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); |
1610 | unlock_fb_info(fb_info); |
1611 | |
1612 | if (ret) { |
1613 | ret = -EINVAL; |
1614 | goto done; |
1615 | } |
1616 | |
1617 | if (fb_info->pixmap.addr && |
1618 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) |
1619 | kfree(fb_info->pixmap.addr); |
1620 | fb_destroy_modelist(&fb_info->modelist); |
1621 | registered_fb[i]=NULL; |
1622 | num_registered_fb--; |
1623 | fb_cleanup_device(fb_info); |
1624 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1625 | event.info = fb_info; |
1626 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
1627 | |
1628 | /* this may free fb info */ |
1629 | if (fb_info->fbops->fb_destroy) |
1630 | fb_info->fbops->fb_destroy(fb_info); |
1631 | done: |
1632 | return ret; |
1633 | } |
1634 | |
1635 | /** |
1636 | * fb_set_suspend - low level driver signals suspend |
1637 | * @info: framebuffer affected |
1638 | * @state: 0 = resuming, !=0 = suspending |
1639 | * |
1640 | * This is meant to be used by low level drivers to |
1641 | * signal suspend/resume to the core & clients. |
1642 | * It must be called with the console semaphore held |
1643 | */ |
1644 | void fb_set_suspend(struct fb_info *info, int state) |
1645 | { |
1646 | struct fb_event event; |
1647 | |
1648 | if (!lock_fb_info(info)) |
1649 | return; |
1650 | event.info = info; |
1651 | if (state) { |
1652 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1653 | info->state = FBINFO_STATE_SUSPENDED; |
1654 | } else { |
1655 | info->state = FBINFO_STATE_RUNNING; |
1656 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1657 | } |
1658 | unlock_fb_info(info); |
1659 | } |
1660 | |
1661 | /** |
1662 | * fbmem_init - init frame buffer subsystem |
1663 | * |
1664 | * Initialize the frame buffer subsystem. |
1665 | * |
1666 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. |
1667 | * |
1668 | */ |
1669 | |
1670 | static int __init |
1671 | fbmem_init(void) |
1672 | { |
1673 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1674 | |
1675 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1676 | printk("unable to get major %d for fb devs\n", FB_MAJOR); |
1677 | |
1678 | fb_class = class_create(THIS_MODULE, "graphics"); |
1679 | if (IS_ERR(fb_class)) { |
1680 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); |
1681 | fb_class = NULL; |
1682 | } |
1683 | return 0; |
1684 | } |
1685 | |
1686 | #ifdef MODULE |
1687 | module_init(fbmem_init); |
1688 | static void __exit |
1689 | fbmem_exit(void) |
1690 | { |
1691 | remove_proc_entry("fb", NULL); |
1692 | class_destroy(fb_class); |
1693 | unregister_chrdev(FB_MAJOR, "fb"); |
1694 | } |
1695 | |
1696 | module_exit(fbmem_exit); |
1697 | MODULE_LICENSE("GPL"); |
1698 | MODULE_DESCRIPTION("Framebuffer base"); |
1699 | #else |
1700 | subsys_initcall(fbmem_init); |
1701 | #endif |
1702 | |
1703 | int fb_new_modelist(struct fb_info *info) |
1704 | { |
1705 | struct fb_event event; |
1706 | struct fb_var_screeninfo var = info->var; |
1707 | struct list_head *pos, *n; |
1708 | struct fb_modelist *modelist; |
1709 | struct fb_videomode *m, mode; |
1710 | int err = 1; |
1711 | |
1712 | list_for_each_safe(pos, n, &info->modelist) { |
1713 | modelist = list_entry(pos, struct fb_modelist, list); |
1714 | m = &modelist->mode; |
1715 | fb_videomode_to_var(&var, m); |
1716 | var.activate = FB_ACTIVATE_TEST; |
1717 | err = fb_set_var(info, &var); |
1718 | fb_var_to_videomode(&mode, &var); |
1719 | if (err || !fb_mode_is_equal(m, &mode)) { |
1720 | list_del(pos); |
1721 | kfree(pos); |
1722 | } |
1723 | } |
1724 | |
1725 | err = 1; |
1726 | |
1727 | if (!list_empty(&info->modelist)) { |
1728 | if (!lock_fb_info(info)) |
1729 | return -ENODEV; |
1730 | event.info = info; |
1731 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1732 | unlock_fb_info(info); |
1733 | } |
1734 | |
1735 | return err; |
1736 | } |
1737 | |
1738 | static char *video_options[FB_MAX] __read_mostly; |
1739 | static int ofonly __read_mostly; |
1740 | |
1741 | /** |
1742 | * fb_get_options - get kernel boot parameters |
1743 | * @name: framebuffer name as it would appear in |
1744 | * the boot parameter line |
1745 | * (video=<name>:<options>) |
1746 | * @option: the option will be stored here |
1747 | * |
1748 | * NOTE: Needed to maintain backwards compatibility |
1749 | */ |
1750 | int fb_get_options(char *name, char **option) |
1751 | { |
1752 | char *opt, *options = NULL; |
1753 | int opt_len, retval = 0; |
1754 | int name_len = strlen(name), i; |
1755 | |
1756 | if (name_len && ofonly && strncmp(name, "offb", 4)) |
1757 | retval = 1; |
1758 | |
1759 | if (name_len && !retval) { |
1760 | for (i = 0; i < FB_MAX; i++) { |
1761 | if (video_options[i] == NULL) |
1762 | continue; |
1763 | opt_len = strlen(video_options[i]); |
1764 | if (!opt_len) |
1765 | continue; |
1766 | opt = video_options[i]; |
1767 | if (!strncmp(name, opt, name_len) && |
1768 | opt[name_len] == ':') |
1769 | options = opt + name_len + 1; |
1770 | } |
1771 | } |
1772 | if (options && !strncmp(options, "off", 3)) |
1773 | retval = 1; |
1774 | |
1775 | if (option) |
1776 | *option = options; |
1777 | |
1778 | return retval; |
1779 | } |
1780 | |
1781 | #ifndef MODULE |
1782 | /** |
1783 | * video_setup - process command line options |
1784 | * @options: string of options |
1785 | * |
1786 | * Process command line options for frame buffer subsystem. |
1787 | * |
1788 | * NOTE: This function is a __setup and __init function. |
1789 | * It only stores the options. Drivers have to call |
1790 | * fb_get_options() as necessary. |
1791 | * |
1792 | * Returns zero. |
1793 | * |
1794 | */ |
1795 | static int __init video_setup(char *options) |
1796 | { |
1797 | int i, global = 0; |
1798 | |
1799 | if (!options || !*options) |
1800 | global = 1; |
1801 | |
1802 | if (!global && !strncmp(options, "ofonly", 6)) { |
1803 | ofonly = 1; |
1804 | global = 1; |
1805 | } |
1806 | |
1807 | if (!global && !strchr(options, ':')) { |
1808 | fb_mode_option = options; |
1809 | global = 1; |
1810 | } |
1811 | |
1812 | if (!global) { |
1813 | for (i = 0; i < FB_MAX; i++) { |
1814 | if (video_options[i] == NULL) { |
1815 | video_options[i] = options; |
1816 | break; |
1817 | } |
1818 | |
1819 | } |
1820 | } |
1821 | |
1822 | return 1; |
1823 | } |
1824 | __setup("video=", video_setup); |
1825 | #endif |
1826 | |
1827 | /* |
1828 | * Visible symbols for modules |
1829 | */ |
1830 | |
1831 | EXPORT_SYMBOL(register_framebuffer); |
1832 | EXPORT_SYMBOL(unregister_framebuffer); |
1833 | EXPORT_SYMBOL(num_registered_fb); |
1834 | EXPORT_SYMBOL(registered_fb); |
1835 | EXPORT_SYMBOL(fb_show_logo); |
1836 | EXPORT_SYMBOL(fb_set_var); |
1837 | EXPORT_SYMBOL(fb_blank); |
1838 | EXPORT_SYMBOL(fb_pan_display); |
1839 | EXPORT_SYMBOL(fb_get_buffer_offset); |
1840 | EXPORT_SYMBOL(fb_set_suspend); |
1841 | EXPORT_SYMBOL(fb_get_options); |
1842 | |
1843 | MODULE_LICENSE("GPL"); |
1844 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9