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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 | static DEFINE_MUTEX(registration_lock); |
46 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
47 | int num_registered_fb __read_mostly; |
48 | |
49 | static struct fb_info *get_fb_info(unsigned int idx) |
50 | { |
51 | struct fb_info *fb_info; |
52 | |
53 | if (idx >= FB_MAX) |
54 | return ERR_PTR(-ENODEV); |
55 | |
56 | mutex_lock(®istration_lock); |
57 | fb_info = registered_fb[idx]; |
58 | if (fb_info) |
59 | atomic_inc(&fb_info->count); |
60 | mutex_unlock(®istration_lock); |
61 | |
62 | return fb_info; |
63 | } |
64 | |
65 | static void put_fb_info(struct fb_info *fb_info) |
66 | { |
67 | if (!atomic_dec_and_test(&fb_info->count)) |
68 | return; |
69 | if (fb_info->fbops->fb_destroy) |
70 | fb_info->fbops->fb_destroy(fb_info); |
71 | } |
72 | |
73 | int lock_fb_info(struct fb_info *info) |
74 | { |
75 | mutex_lock(&info->lock); |
76 | if (!info->fbops) { |
77 | mutex_unlock(&info->lock); |
78 | return 0; |
79 | } |
80 | return 1; |
81 | } |
82 | EXPORT_SYMBOL(lock_fb_info); |
83 | |
84 | /* |
85 | * Helpers |
86 | */ |
87 | |
88 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
89 | struct fb_fix_screeninfo *fix) |
90 | { |
91 | int depth = 0; |
92 | |
93 | if (fix->visual == FB_VISUAL_MONO01 || |
94 | fix->visual == FB_VISUAL_MONO10) |
95 | depth = 1; |
96 | else { |
97 | if (var->green.length == var->blue.length && |
98 | var->green.length == var->red.length && |
99 | var->green.offset == var->blue.offset && |
100 | var->green.offset == var->red.offset) |
101 | depth = var->green.length; |
102 | else |
103 | depth = var->green.length + var->red.length + |
104 | var->blue.length; |
105 | } |
106 | |
107 | return depth; |
108 | } |
109 | EXPORT_SYMBOL(fb_get_color_depth); |
110 | |
111 | /* |
112 | * Data padding functions. |
113 | */ |
114 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
115 | { |
116 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
117 | } |
118 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
119 | |
120 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
121 | u32 shift_high, u32 shift_low, u32 mod) |
122 | { |
123 | u8 mask = (u8) (0xfff << shift_high), tmp; |
124 | int i, j; |
125 | |
126 | for (i = height; i--; ) { |
127 | for (j = 0; j < idx; j++) { |
128 | tmp = dst[j]; |
129 | tmp &= mask; |
130 | tmp |= *src >> shift_low; |
131 | dst[j] = tmp; |
132 | tmp = *src << shift_high; |
133 | dst[j+1] = tmp; |
134 | src++; |
135 | } |
136 | tmp = dst[idx]; |
137 | tmp &= mask; |
138 | tmp |= *src >> shift_low; |
139 | dst[idx] = tmp; |
140 | if (shift_high < mod) { |
141 | tmp = *src << shift_high; |
142 | dst[idx+1] = tmp; |
143 | } |
144 | src++; |
145 | dst += d_pitch; |
146 | } |
147 | } |
148 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
149 | |
150 | /* |
151 | * we need to lock this section since fb_cursor |
152 | * may use fb_imageblit() |
153 | */ |
154 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) |
155 | { |
156 | u32 align = buf->buf_align - 1, offset; |
157 | char *addr = buf->addr; |
158 | |
159 | /* If IO mapped, we need to sync before access, no sharing of |
160 | * the pixmap is done |
161 | */ |
162 | if (buf->flags & FB_PIXMAP_IO) { |
163 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) |
164 | info->fbops->fb_sync(info); |
165 | return addr; |
166 | } |
167 | |
168 | /* See if we fit in the remaining pixmap space */ |
169 | offset = buf->offset + align; |
170 | offset &= ~align; |
171 | if (offset + size > buf->size) { |
172 | /* We do not fit. In order to be able to re-use the buffer, |
173 | * we must ensure no asynchronous DMA'ing or whatever operation |
174 | * is in progress, we sync for that. |
175 | */ |
176 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) |
177 | info->fbops->fb_sync(info); |
178 | offset = 0; |
179 | } |
180 | buf->offset = offset + size; |
181 | addr += offset; |
182 | |
183 | return addr; |
184 | } |
185 | |
186 | #ifdef CONFIG_LOGO |
187 | |
188 | static inline unsigned safe_shift(unsigned d, int n) |
189 | { |
190 | return n < 0 ? d >> -n : d << n; |
191 | } |
192 | |
193 | static void fb_set_logocmap(struct fb_info *info, |
194 | const struct linux_logo *logo) |
195 | { |
196 | struct fb_cmap palette_cmap; |
197 | u16 palette_green[16]; |
198 | u16 palette_blue[16]; |
199 | u16 palette_red[16]; |
200 | int i, j, n; |
201 | const unsigned char *clut = logo->clut; |
202 | |
203 | palette_cmap.start = 0; |
204 | palette_cmap.len = 16; |
205 | palette_cmap.red = palette_red; |
206 | palette_cmap.green = palette_green; |
207 | palette_cmap.blue = palette_blue; |
208 | palette_cmap.transp = NULL; |
209 | |
210 | for (i = 0; i < logo->clutsize; i += n) { |
211 | n = logo->clutsize - i; |
212 | /* palette_cmap provides space for only 16 colors at once */ |
213 | if (n > 16) |
214 | n = 16; |
215 | palette_cmap.start = 32 + i; |
216 | palette_cmap.len = n; |
217 | for (j = 0; j < n; ++j) { |
218 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; |
219 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; |
220 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; |
221 | clut += 3; |
222 | } |
223 | fb_set_cmap(&palette_cmap, info); |
224 | } |
225 | } |
226 | |
227 | static void fb_set_logo_truepalette(struct fb_info *info, |
228 | const struct linux_logo *logo, |
229 | u32 *palette) |
230 | { |
231 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
232 | unsigned char redmask, greenmask, bluemask; |
233 | int redshift, greenshift, blueshift; |
234 | int i; |
235 | const unsigned char *clut = logo->clut; |
236 | |
237 | /* |
238 | * We have to create a temporary palette since console palette is only |
239 | * 16 colors long. |
240 | */ |
241 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ |
242 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; |
243 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; |
244 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; |
245 | redshift = info->var.red.offset - (8 - info->var.red.length); |
246 | greenshift = info->var.green.offset - (8 - info->var.green.length); |
247 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); |
248 | |
249 | for ( i = 0; i < logo->clutsize; i++) { |
250 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | |
251 | safe_shift((clut[1] & greenmask), greenshift) | |
252 | safe_shift((clut[2] & bluemask), blueshift)); |
253 | clut += 3; |
254 | } |
255 | } |
256 | |
257 | static void fb_set_logo_directpalette(struct fb_info *info, |
258 | const struct linux_logo *logo, |
259 | u32 *palette) |
260 | { |
261 | int redshift, greenshift, blueshift; |
262 | int i; |
263 | |
264 | redshift = info->var.red.offset; |
265 | greenshift = info->var.green.offset; |
266 | blueshift = info->var.blue.offset; |
267 | |
268 | for (i = 32; i < 32 + logo->clutsize; i++) |
269 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
270 | } |
271 | |
272 | static void fb_set_logo(struct fb_info *info, |
273 | const struct linux_logo *logo, u8 *dst, |
274 | int depth) |
275 | { |
276 | int i, j, k; |
277 | const u8 *src = logo->data; |
278 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
279 | u8 fg = 1, d; |
280 | |
281 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
282 | case 1: |
283 | fg = 1; |
284 | break; |
285 | case 2: |
286 | fg = 3; |
287 | break; |
288 | default: |
289 | fg = 7; |
290 | break; |
291 | } |
292 | |
293 | if (info->fix.visual == FB_VISUAL_MONO01 || |
294 | info->fix.visual == FB_VISUAL_MONO10) |
295 | fg = ~((u8) (0xfff << info->var.green.length)); |
296 | |
297 | switch (depth) { |
298 | case 4: |
299 | for (i = 0; i < logo->height; i++) |
300 | for (j = 0; j < logo->width; src++) { |
301 | *dst++ = *src >> 4; |
302 | j++; |
303 | if (j < logo->width) { |
304 | *dst++ = *src & 0x0f; |
305 | j++; |
306 | } |
307 | } |
308 | break; |
309 | case 1: |
310 | for (i = 0; i < logo->height; i++) { |
311 | for (j = 0; j < logo->width; src++) { |
312 | d = *src ^ xor; |
313 | for (k = 7; k >= 0; k--) { |
314 | *dst++ = ((d >> k) & 1) ? fg : 0; |
315 | j++; |
316 | } |
317 | } |
318 | } |
319 | break; |
320 | } |
321 | } |
322 | |
323 | /* |
324 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), |
325 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on |
326 | * the visual format and color depth of the framebuffer, the DAC, the |
327 | * pseudo_palette, and the logo data will be adjusted accordingly. |
328 | * |
329 | * Case 1 - linux_logo_clut224: |
330 | * Color exceeds the number of console colors (16), thus we set the hardware DAC |
331 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. |
332 | * |
333 | * For visuals that require color info from the pseudo_palette, we also construct |
334 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags |
335 | * will be set. |
336 | * |
337 | * Case 2 - linux_logo_vga16: |
338 | * The number of colors just matches the console colors, thus there is no need |
339 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, |
340 | * each byte contains color information for two pixels (upper and lower nibble). |
341 | * To be consistent with fb_imageblit() usage, we therefore separate the two |
342 | * nibbles into separate bytes. The "depth" flag will be set to 4. |
343 | * |
344 | * Case 3 - linux_logo_mono: |
345 | * This is similar with Case 2. Each byte contains information for 8 pixels. |
346 | * We isolate each bit and expand each into a byte. The "depth" flag will |
347 | * be set to 1. |
348 | */ |
349 | static struct logo_data { |
350 | int depth; |
351 | int needs_directpalette; |
352 | int needs_truepalette; |
353 | int needs_cmapreset; |
354 | const struct linux_logo *logo; |
355 | } fb_logo __read_mostly; |
356 | |
357 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
358 | { |
359 | u32 size = width * height, i; |
360 | |
361 | out += size - 1; |
362 | |
363 | for (i = size; i--; ) |
364 | *out-- = *in++; |
365 | } |
366 | |
367 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) |
368 | { |
369 | int i, j, h = height - 1; |
370 | |
371 | for (i = 0; i < height; i++) |
372 | for (j = 0; j < width; j++) |
373 | out[height * j + h - i] = *in++; |
374 | } |
375 | |
376 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) |
377 | { |
378 | int i, j, w = width - 1; |
379 | |
380 | for (i = 0; i < height; i++) |
381 | for (j = 0; j < width; j++) |
382 | out[height * (w - j) + i] = *in++; |
383 | } |
384 | |
385 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, |
386 | struct fb_image *image, int rotate) |
387 | { |
388 | u32 tmp; |
389 | |
390 | if (rotate == FB_ROTATE_UD) { |
391 | fb_rotate_logo_ud(image->data, dst, image->width, |
392 | image->height); |
393 | image->dx = info->var.xres - image->width - image->dx; |
394 | image->dy = info->var.yres - image->height - image->dy; |
395 | } else if (rotate == FB_ROTATE_CW) { |
396 | fb_rotate_logo_cw(image->data, dst, image->width, |
397 | image->height); |
398 | tmp = image->width; |
399 | image->width = image->height; |
400 | image->height = tmp; |
401 | tmp = image->dy; |
402 | image->dy = image->dx; |
403 | image->dx = info->var.xres - image->width - tmp; |
404 | } else if (rotate == FB_ROTATE_CCW) { |
405 | fb_rotate_logo_ccw(image->data, dst, image->width, |
406 | image->height); |
407 | tmp = image->width; |
408 | image->width = image->height; |
409 | image->height = tmp; |
410 | tmp = image->dx; |
411 | image->dx = image->dy; |
412 | image->dy = info->var.yres - image->height - tmp; |
413 | } |
414 | |
415 | image->data = dst; |
416 | } |
417 | |
418 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, |
419 | int rotate, unsigned int num) |
420 | { |
421 | unsigned int x; |
422 | |
423 | if (rotate == FB_ROTATE_UR) { |
424 | for (x = 0; |
425 | x < num && image->dx + image->width <= info->var.xres; |
426 | x++) { |
427 | info->fbops->fb_imageblit(info, image); |
428 | image->dx += image->width + 8; |
429 | } |
430 | } else if (rotate == FB_ROTATE_UD) { |
431 | for (x = 0; x < num && image->dx >= 0; x++) { |
432 | info->fbops->fb_imageblit(info, image); |
433 | image->dx -= image->width + 8; |
434 | } |
435 | } else if (rotate == FB_ROTATE_CW) { |
436 | for (x = 0; |
437 | x < num && image->dy + image->height <= info->var.yres; |
438 | x++) { |
439 | info->fbops->fb_imageblit(info, image); |
440 | image->dy += image->height + 8; |
441 | } |
442 | } else if (rotate == FB_ROTATE_CCW) { |
443 | for (x = 0; x < num && image->dy >= 0; x++) { |
444 | info->fbops->fb_imageblit(info, image); |
445 | image->dy -= image->height + 8; |
446 | } |
447 | } |
448 | } |
449 | |
450 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
451 | const struct linux_logo *logo, int y, |
452 | unsigned int n) |
453 | { |
454 | u32 *palette = NULL, *saved_pseudo_palette = NULL; |
455 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
456 | struct fb_image image; |
457 | |
458 | /* Return if the frame buffer is not mapped or suspended */ |
459 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
460 | info->flags & FBINFO_MODULE) |
461 | return 0; |
462 | |
463 | image.depth = 8; |
464 | image.data = logo->data; |
465 | |
466 | if (fb_logo.needs_cmapreset) |
467 | fb_set_logocmap(info, logo); |
468 | |
469 | if (fb_logo.needs_truepalette || |
470 | fb_logo.needs_directpalette) { |
471 | palette = kmalloc(256 * 4, GFP_KERNEL); |
472 | if (palette == NULL) |
473 | return 0; |
474 | |
475 | if (fb_logo.needs_truepalette) |
476 | fb_set_logo_truepalette(info, logo, palette); |
477 | else |
478 | fb_set_logo_directpalette(info, logo, palette); |
479 | |
480 | saved_pseudo_palette = info->pseudo_palette; |
481 | info->pseudo_palette = palette; |
482 | } |
483 | |
484 | if (fb_logo.depth <= 4) { |
485 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
486 | if (logo_new == NULL) { |
487 | kfree(palette); |
488 | if (saved_pseudo_palette) |
489 | info->pseudo_palette = saved_pseudo_palette; |
490 | return 0; |
491 | } |
492 | image.data = logo_new; |
493 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
494 | } |
495 | |
496 | image.dx = 0; |
497 | image.dy = y; |
498 | image.width = logo->width; |
499 | image.height = logo->height; |
500 | |
501 | if (rotate) { |
502 | logo_rotate = kmalloc(logo->width * |
503 | logo->height, GFP_KERNEL); |
504 | if (logo_rotate) |
505 | fb_rotate_logo(info, logo_rotate, &image, rotate); |
506 | } |
507 | |
508 | fb_do_show_logo(info, &image, rotate, n); |
509 | |
510 | kfree(palette); |
511 | if (saved_pseudo_palette != NULL) |
512 | info->pseudo_palette = saved_pseudo_palette; |
513 | kfree(logo_new); |
514 | kfree(logo_rotate); |
515 | return logo->height; |
516 | } |
517 | |
518 | |
519 | #ifdef CONFIG_FB_LOGO_EXTRA |
520 | |
521 | #define FB_LOGO_EX_NUM_MAX 10 |
522 | static struct logo_data_extra { |
523 | const struct linux_logo *logo; |
524 | unsigned int n; |
525 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; |
526 | static unsigned int fb_logo_ex_num; |
527 | |
528 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) |
529 | { |
530 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) |
531 | return; |
532 | |
533 | fb_logo_ex[fb_logo_ex_num].logo = logo; |
534 | fb_logo_ex[fb_logo_ex_num].n = n; |
535 | fb_logo_ex_num++; |
536 | } |
537 | |
538 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, |
539 | unsigned int yres) |
540 | { |
541 | unsigned int i; |
542 | |
543 | /* FIXME: logo_ex supports only truecolor fb. */ |
544 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) |
545 | fb_logo_ex_num = 0; |
546 | |
547 | for (i = 0; i < fb_logo_ex_num; i++) { |
548 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
549 | fb_logo_ex[i].logo = NULL; |
550 | continue; |
551 | } |
552 | height += fb_logo_ex[i].logo->height; |
553 | if (height > yres) { |
554 | height -= fb_logo_ex[i].logo->height; |
555 | fb_logo_ex_num = i; |
556 | break; |
557 | } |
558 | } |
559 | return height; |
560 | } |
561 | |
562 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
563 | { |
564 | unsigned int i; |
565 | |
566 | for (i = 0; i < fb_logo_ex_num; i++) |
567 | y += fb_show_logo_line(info, rotate, |
568 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); |
569 | |
570 | return y; |
571 | } |
572 | |
573 | #else /* !CONFIG_FB_LOGO_EXTRA */ |
574 | |
575 | static inline int fb_prepare_extra_logos(struct fb_info *info, |
576 | unsigned int height, |
577 | unsigned int yres) |
578 | { |
579 | return height; |
580 | } |
581 | |
582 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
583 | { |
584 | return y; |
585 | } |
586 | |
587 | #endif /* CONFIG_FB_LOGO_EXTRA */ |
588 | |
589 | |
590 | int fb_prepare_logo(struct fb_info *info, int rotate) |
591 | { |
592 | int depth = fb_get_color_depth(&info->var, &info->fix); |
593 | unsigned int yres; |
594 | |
595 | memset(&fb_logo, 0, sizeof(struct logo_data)); |
596 | |
597 | if (info->flags & FBINFO_MISC_TILEBLITTING || |
598 | info->flags & FBINFO_MODULE) |
599 | return 0; |
600 | |
601 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { |
602 | depth = info->var.blue.length; |
603 | if (info->var.red.length < depth) |
604 | depth = info->var.red.length; |
605 | if (info->var.green.length < depth) |
606 | depth = info->var.green.length; |
607 | } |
608 | |
609 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
610 | /* assume console colormap */ |
611 | depth = 4; |
612 | } |
613 | |
614 | /* Return if no suitable logo was found */ |
615 | fb_logo.logo = fb_find_logo(depth); |
616 | |
617 | if (!fb_logo.logo) { |
618 | return 0; |
619 | } |
620 | |
621 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
622 | yres = info->var.yres; |
623 | else |
624 | yres = info->var.xres; |
625 | |
626 | if (fb_logo.logo->height > yres) { |
627 | fb_logo.logo = NULL; |
628 | return 0; |
629 | } |
630 | |
631 | /* What depth we asked for might be different from what we get */ |
632 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) |
633 | fb_logo.depth = 8; |
634 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) |
635 | fb_logo.depth = 4; |
636 | else |
637 | fb_logo.depth = 1; |
638 | |
639 | |
640 | if (fb_logo.depth > 4 && depth > 4) { |
641 | switch (info->fix.visual) { |
642 | case FB_VISUAL_TRUECOLOR: |
643 | fb_logo.needs_truepalette = 1; |
644 | break; |
645 | case FB_VISUAL_DIRECTCOLOR: |
646 | fb_logo.needs_directpalette = 1; |
647 | fb_logo.needs_cmapreset = 1; |
648 | break; |
649 | case FB_VISUAL_PSEUDOCOLOR: |
650 | fb_logo.needs_cmapreset = 1; |
651 | break; |
652 | } |
653 | } |
654 | |
655 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
656 | } |
657 | |
658 | int fb_show_logo(struct fb_info *info, int rotate) |
659 | { |
660 | int y; |
661 | |
662 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, |
663 | num_online_cpus()); |
664 | y = fb_show_extra_logos(info, y, rotate); |
665 | |
666 | return y; |
667 | } |
668 | #else |
669 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
670 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } |
671 | #endif /* CONFIG_LOGO */ |
672 | |
673 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
674 | { |
675 | mutex_lock(®istration_lock); |
676 | return (*pos < FB_MAX) ? pos : NULL; |
677 | } |
678 | |
679 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) |
680 | { |
681 | (*pos)++; |
682 | return (*pos < FB_MAX) ? pos : NULL; |
683 | } |
684 | |
685 | static void fb_seq_stop(struct seq_file *m, void *v) |
686 | { |
687 | mutex_unlock(®istration_lock); |
688 | } |
689 | |
690 | static int fb_seq_show(struct seq_file *m, void *v) |
691 | { |
692 | int i = *(loff_t *)v; |
693 | struct fb_info *fi = registered_fb[i]; |
694 | |
695 | if (fi) |
696 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); |
697 | return 0; |
698 | } |
699 | |
700 | static const struct seq_operations proc_fb_seq_ops = { |
701 | .start = fb_seq_start, |
702 | .next = fb_seq_next, |
703 | .stop = fb_seq_stop, |
704 | .show = fb_seq_show, |
705 | }; |
706 | |
707 | static int proc_fb_open(struct inode *inode, struct file *file) |
708 | { |
709 | return seq_open(file, &proc_fb_seq_ops); |
710 | } |
711 | |
712 | static const struct file_operations fb_proc_fops = { |
713 | .owner = THIS_MODULE, |
714 | .open = proc_fb_open, |
715 | .read = seq_read, |
716 | .llseek = seq_lseek, |
717 | .release = seq_release, |
718 | }; |
719 | |
720 | /* |
721 | * We hold a reference to the fb_info in file->private_data, |
722 | * but if the current registered fb has changed, we don't |
723 | * actually want to use it. |
724 | * |
725 | * So look up the fb_info using the inode minor number, |
726 | * and just verify it against the reference we have. |
727 | */ |
728 | static struct fb_info *file_fb_info(struct file *file) |
729 | { |
730 | struct inode *inode = file_inode(file); |
731 | int fbidx = iminor(inode); |
732 | struct fb_info *info = registered_fb[fbidx]; |
733 | |
734 | if (info != file->private_data) |
735 | info = NULL; |
736 | return info; |
737 | } |
738 | |
739 | static ssize_t |
740 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
741 | { |
742 | unsigned long p = *ppos; |
743 | struct fb_info *info = file_fb_info(file); |
744 | u8 *buffer, *dst; |
745 | u8 __iomem *src; |
746 | int c, cnt = 0, err = 0; |
747 | unsigned long total_size; |
748 | |
749 | if (!info || ! info->screen_base) |
750 | return -ENODEV; |
751 | |
752 | if (info->state != FBINFO_STATE_RUNNING) |
753 | return -EPERM; |
754 | |
755 | if (info->fbops->fb_read) |
756 | return info->fbops->fb_read(info, buf, count, ppos); |
757 | |
758 | total_size = info->screen_size; |
759 | |
760 | if (total_size == 0) |
761 | total_size = info->fix.smem_len; |
762 | |
763 | if (p >= total_size) |
764 | return 0; |
765 | |
766 | if (count >= total_size) |
767 | count = total_size; |
768 | |
769 | if (count + p > total_size) |
770 | count = total_size - p; |
771 | |
772 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
773 | GFP_KERNEL); |
774 | if (!buffer) |
775 | return -ENOMEM; |
776 | |
777 | src = (u8 __iomem *) (info->screen_base + p); |
778 | |
779 | if (info->fbops->fb_sync) |
780 | info->fbops->fb_sync(info); |
781 | |
782 | while (count) { |
783 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
784 | dst = buffer; |
785 | fb_memcpy_fromfb(dst, src, c); |
786 | dst += c; |
787 | src += c; |
788 | |
789 | if (copy_to_user(buf, buffer, c)) { |
790 | err = -EFAULT; |
791 | break; |
792 | } |
793 | *ppos += c; |
794 | buf += c; |
795 | cnt += c; |
796 | count -= c; |
797 | } |
798 | |
799 | kfree(buffer); |
800 | |
801 | return (err) ? err : cnt; |
802 | } |
803 | |
804 | static ssize_t |
805 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
806 | { |
807 | unsigned long p = *ppos; |
808 | struct fb_info *info = file_fb_info(file); |
809 | u8 *buffer, *src; |
810 | u8 __iomem *dst; |
811 | int c, cnt = 0, err = 0; |
812 | unsigned long total_size; |
813 | |
814 | if (!info || !info->screen_base) |
815 | return -ENODEV; |
816 | |
817 | if (info->state != FBINFO_STATE_RUNNING) |
818 | return -EPERM; |
819 | |
820 | if (info->fbops->fb_write) |
821 | return info->fbops->fb_write(info, buf, count, ppos); |
822 | |
823 | total_size = info->screen_size; |
824 | |
825 | if (total_size == 0) |
826 | total_size = info->fix.smem_len; |
827 | |
828 | if (p > total_size) |
829 | return -EFBIG; |
830 | |
831 | if (count > total_size) { |
832 | err = -EFBIG; |
833 | count = total_size; |
834 | } |
835 | |
836 | if (count + p > total_size) { |
837 | if (!err) |
838 | err = -ENOSPC; |
839 | |
840 | count = total_size - p; |
841 | } |
842 | |
843 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
844 | GFP_KERNEL); |
845 | if (!buffer) |
846 | return -ENOMEM; |
847 | |
848 | dst = (u8 __iomem *) (info->screen_base + p); |
849 | |
850 | if (info->fbops->fb_sync) |
851 | info->fbops->fb_sync(info); |
852 | |
853 | while (count) { |
854 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
855 | src = buffer; |
856 | |
857 | if (copy_from_user(src, buf, c)) { |
858 | err = -EFAULT; |
859 | break; |
860 | } |
861 | |
862 | fb_memcpy_tofb(dst, src, c); |
863 | dst += c; |
864 | src += c; |
865 | *ppos += c; |
866 | buf += c; |
867 | cnt += c; |
868 | count -= c; |
869 | } |
870 | |
871 | kfree(buffer); |
872 | |
873 | return (cnt) ? cnt : err; |
874 | } |
875 | |
876 | int |
877 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) |
878 | { |
879 | struct fb_fix_screeninfo *fix = &info->fix; |
880 | unsigned int yres = info->var.yres; |
881 | int err = 0; |
882 | |
883 | if (var->yoffset > 0) { |
884 | if (var->vmode & FB_VMODE_YWRAP) { |
885 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) |
886 | err = -EINVAL; |
887 | else |
888 | yres = 0; |
889 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) |
890 | err = -EINVAL; |
891 | } |
892 | |
893 | if (var->xoffset > 0 && (!fix->xpanstep || |
894 | (var->xoffset % fix->xpanstep))) |
895 | err = -EINVAL; |
896 | |
897 | if (err || !info->fbops->fb_pan_display || |
898 | var->yoffset > info->var.yres_virtual - yres || |
899 | var->xoffset > info->var.xres_virtual - info->var.xres) |
900 | return -EINVAL; |
901 | |
902 | if ((err = info->fbops->fb_pan_display(var, info))) |
903 | return err; |
904 | info->var.xoffset = var->xoffset; |
905 | info->var.yoffset = var->yoffset; |
906 | if (var->vmode & FB_VMODE_YWRAP) |
907 | info->var.vmode |= FB_VMODE_YWRAP; |
908 | else |
909 | info->var.vmode &= ~FB_VMODE_YWRAP; |
910 | return 0; |
911 | } |
912 | |
913 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
914 | u32 activate) |
915 | { |
916 | struct fb_event event; |
917 | struct fb_blit_caps caps, fbcaps; |
918 | int err = 0; |
919 | |
920 | memset(&caps, 0, sizeof(caps)); |
921 | memset(&fbcaps, 0, sizeof(fbcaps)); |
922 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; |
923 | event.info = info; |
924 | event.data = ∩︀ |
925 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); |
926 | info->fbops->fb_get_caps(info, &fbcaps, var); |
927 | |
928 | if (((fbcaps.x ^ caps.x) & caps.x) || |
929 | ((fbcaps.y ^ caps.y) & caps.y) || |
930 | (fbcaps.len < caps.len)) |
931 | err = -EINVAL; |
932 | |
933 | return err; |
934 | } |
935 | |
936 | int |
937 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) |
938 | { |
939 | int flags = info->flags; |
940 | int ret = 0; |
941 | |
942 | if (var->activate & FB_ACTIVATE_INV_MODE) { |
943 | struct fb_videomode mode1, mode2; |
944 | |
945 | fb_var_to_videomode(&mode1, var); |
946 | fb_var_to_videomode(&mode2, &info->var); |
947 | /* make sure we don't delete the videomode of current var */ |
948 | ret = fb_mode_is_equal(&mode1, &mode2); |
949 | |
950 | if (!ret) { |
951 | struct fb_event event; |
952 | |
953 | event.info = info; |
954 | event.data = &mode1; |
955 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
956 | } |
957 | |
958 | if (!ret) |
959 | fb_delete_videomode(&mode1, &info->modelist); |
960 | |
961 | |
962 | ret = (ret) ? -EINVAL : 0; |
963 | goto done; |
964 | } |
965 | |
966 | if ((var->activate & FB_ACTIVATE_FORCE) || |
967 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { |
968 | u32 activate = var->activate; |
969 | |
970 | /* When using FOURCC mode, make sure the red, green, blue and |
971 | * transp fields are set to 0. |
972 | */ |
973 | if ((info->fix.capabilities & FB_CAP_FOURCC) && |
974 | var->grayscale > 1) { |
975 | if (var->red.offset || var->green.offset || |
976 | var->blue.offset || var->transp.offset || |
977 | var->red.length || var->green.length || |
978 | var->blue.length || var->transp.length || |
979 | var->red.msb_right || var->green.msb_right || |
980 | var->blue.msb_right || var->transp.msb_right) |
981 | return -EINVAL; |
982 | } |
983 | |
984 | if (!info->fbops->fb_check_var) { |
985 | *var = info->var; |
986 | goto done; |
987 | } |
988 | |
989 | ret = info->fbops->fb_check_var(var, info); |
990 | |
991 | if (ret) |
992 | goto done; |
993 | |
994 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { |
995 | struct fb_var_screeninfo old_var; |
996 | struct fb_videomode mode; |
997 | |
998 | if (info->fbops->fb_get_caps) { |
999 | ret = fb_check_caps(info, var, activate); |
1000 | |
1001 | if (ret) |
1002 | goto done; |
1003 | } |
1004 | |
1005 | old_var = info->var; |
1006 | info->var = *var; |
1007 | |
1008 | if (info->fbops->fb_set_par) { |
1009 | ret = info->fbops->fb_set_par(info); |
1010 | |
1011 | if (ret) { |
1012 | info->var = old_var; |
1013 | printk(KERN_WARNING "detected " |
1014 | "fb_set_par error, " |
1015 | "error code: %d\n", ret); |
1016 | goto done; |
1017 | } |
1018 | } |
1019 | |
1020 | fb_pan_display(info, &info->var); |
1021 | fb_set_cmap(&info->cmap, info); |
1022 | fb_var_to_videomode(&mode, &info->var); |
1023 | |
1024 | if (info->modelist.prev && info->modelist.next && |
1025 | !list_empty(&info->modelist)) |
1026 | ret = fb_add_videomode(&mode, &info->modelist); |
1027 | |
1028 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1029 | struct fb_event event; |
1030 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
1031 | FB_EVENT_MODE_CHANGE_ALL : |
1032 | FB_EVENT_MODE_CHANGE; |
1033 | |
1034 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1035 | event.info = info; |
1036 | event.data = &mode; |
1037 | fb_notifier_call_chain(evnt, &event); |
1038 | } |
1039 | } |
1040 | } |
1041 | |
1042 | done: |
1043 | return ret; |
1044 | } |
1045 | |
1046 | int |
1047 | fb_blank(struct fb_info *info, int blank) |
1048 | { |
1049 | struct fb_event event; |
1050 | int ret = -EINVAL, early_ret; |
1051 | |
1052 | if (blank > FB_BLANK_POWERDOWN) |
1053 | blank = FB_BLANK_POWERDOWN; |
1054 | |
1055 | event.info = info; |
1056 | event.data = ␣ |
1057 | |
1058 | early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event); |
1059 | |
1060 | if (info->fbops->fb_blank) |
1061 | ret = info->fbops->fb_blank(blank, info); |
1062 | |
1063 | if (!ret) |
1064 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1065 | else { |
1066 | /* |
1067 | * if fb_blank is failed then revert effects of |
1068 | * the early blank event. |
1069 | */ |
1070 | if (!early_ret) |
1071 | fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event); |
1072 | } |
1073 | |
1074 | return ret; |
1075 | } |
1076 | |
1077 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1078 | unsigned long arg) |
1079 | { |
1080 | struct fb_ops *fb; |
1081 | struct fb_var_screeninfo var; |
1082 | struct fb_fix_screeninfo fix; |
1083 | struct fb_con2fbmap con2fb; |
1084 | struct fb_cmap cmap_from; |
1085 | struct fb_cmap_user cmap; |
1086 | struct fb_event event; |
1087 | void __user *argp = (void __user *)arg; |
1088 | long ret = 0; |
1089 | |
1090 | switch (cmd) { |
1091 | case FBIOGET_VSCREENINFO: |
1092 | if (!lock_fb_info(info)) |
1093 | return -ENODEV; |
1094 | var = info->var; |
1095 | unlock_fb_info(info); |
1096 | |
1097 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; |
1098 | break; |
1099 | case FBIOPUT_VSCREENINFO: |
1100 | if (copy_from_user(&var, argp, sizeof(var))) |
1101 | return -EFAULT; |
1102 | if (!lock_fb_info(info)) |
1103 | return -ENODEV; |
1104 | console_lock(); |
1105 | info->flags |= FBINFO_MISC_USEREVENT; |
1106 | ret = fb_set_var(info, &var); |
1107 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1108 | console_unlock(); |
1109 | unlock_fb_info(info); |
1110 | if (!ret && copy_to_user(argp, &var, sizeof(var))) |
1111 | ret = -EFAULT; |
1112 | break; |
1113 | case FBIOGET_FSCREENINFO: |
1114 | if (!lock_fb_info(info)) |
1115 | return -ENODEV; |
1116 | fix = info->fix; |
1117 | unlock_fb_info(info); |
1118 | |
1119 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; |
1120 | break; |
1121 | case FBIOPUTCMAP: |
1122 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
1123 | return -EFAULT; |
1124 | ret = fb_set_user_cmap(&cmap, info); |
1125 | break; |
1126 | case FBIOGETCMAP: |
1127 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
1128 | return -EFAULT; |
1129 | if (!lock_fb_info(info)) |
1130 | return -ENODEV; |
1131 | cmap_from = info->cmap; |
1132 | unlock_fb_info(info); |
1133 | ret = fb_cmap_to_user(&cmap_from, &cmap); |
1134 | break; |
1135 | case FBIOPAN_DISPLAY: |
1136 | if (copy_from_user(&var, argp, sizeof(var))) |
1137 | return -EFAULT; |
1138 | if (!lock_fb_info(info)) |
1139 | return -ENODEV; |
1140 | console_lock(); |
1141 | ret = fb_pan_display(info, &var); |
1142 | console_unlock(); |
1143 | unlock_fb_info(info); |
1144 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1145 | return -EFAULT; |
1146 | break; |
1147 | case FBIO_CURSOR: |
1148 | ret = -EINVAL; |
1149 | break; |
1150 | case FBIOGET_CON2FBMAP: |
1151 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1152 | return -EFAULT; |
1153 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1154 | return -EINVAL; |
1155 | con2fb.framebuffer = -1; |
1156 | event.data = &con2fb; |
1157 | if (!lock_fb_info(info)) |
1158 | return -ENODEV; |
1159 | event.info = info; |
1160 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1161 | unlock_fb_info(info); |
1162 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
1163 | break; |
1164 | case FBIOPUT_CON2FBMAP: |
1165 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1166 | return -EFAULT; |
1167 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1168 | return -EINVAL; |
1169 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) |
1170 | return -EINVAL; |
1171 | if (!registered_fb[con2fb.framebuffer]) |
1172 | request_module("fb%d", con2fb.framebuffer); |
1173 | if (!registered_fb[con2fb.framebuffer]) { |
1174 | ret = -EINVAL; |
1175 | break; |
1176 | } |
1177 | event.data = &con2fb; |
1178 | if (!lock_fb_info(info)) |
1179 | return -ENODEV; |
1180 | console_lock(); |
1181 | event.info = info; |
1182 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
1183 | console_unlock(); |
1184 | unlock_fb_info(info); |
1185 | break; |
1186 | case FBIOBLANK: |
1187 | if (!lock_fb_info(info)) |
1188 | return -ENODEV; |
1189 | console_lock(); |
1190 | info->flags |= FBINFO_MISC_USEREVENT; |
1191 | ret = fb_blank(info, arg); |
1192 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1193 | console_unlock(); |
1194 | unlock_fb_info(info); |
1195 | break; |
1196 | default: |
1197 | if (!lock_fb_info(info)) |
1198 | return -ENODEV; |
1199 | fb = info->fbops; |
1200 | if (fb->fb_ioctl) |
1201 | ret = fb->fb_ioctl(info, cmd, arg); |
1202 | else |
1203 | ret = -ENOTTY; |
1204 | unlock_fb_info(info); |
1205 | } |
1206 | return ret; |
1207 | } |
1208 | |
1209 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1210 | { |
1211 | struct fb_info *info = file_fb_info(file); |
1212 | |
1213 | if (!info) |
1214 | return -ENODEV; |
1215 | return do_fb_ioctl(info, cmd, arg); |
1216 | } |
1217 | |
1218 | #ifdef CONFIG_COMPAT |
1219 | struct fb_fix_screeninfo32 { |
1220 | char id[16]; |
1221 | compat_caddr_t smem_start; |
1222 | u32 smem_len; |
1223 | u32 type; |
1224 | u32 type_aux; |
1225 | u32 visual; |
1226 | u16 xpanstep; |
1227 | u16 ypanstep; |
1228 | u16 ywrapstep; |
1229 | u32 line_length; |
1230 | compat_caddr_t mmio_start; |
1231 | u32 mmio_len; |
1232 | u32 accel; |
1233 | u16 reserved[3]; |
1234 | }; |
1235 | |
1236 | struct fb_cmap32 { |
1237 | u32 start; |
1238 | u32 len; |
1239 | compat_caddr_t red; |
1240 | compat_caddr_t green; |
1241 | compat_caddr_t blue; |
1242 | compat_caddr_t transp; |
1243 | }; |
1244 | |
1245 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1246 | unsigned long arg) |
1247 | { |
1248 | struct fb_cmap_user __user *cmap; |
1249 | struct fb_cmap32 __user *cmap32; |
1250 | __u32 data; |
1251 | int err; |
1252 | |
1253 | cmap = compat_alloc_user_space(sizeof(*cmap)); |
1254 | cmap32 = compat_ptr(arg); |
1255 | |
1256 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) |
1257 | return -EFAULT; |
1258 | |
1259 | if (get_user(data, &cmap32->red) || |
1260 | put_user(compat_ptr(data), &cmap->red) || |
1261 | get_user(data, &cmap32->green) || |
1262 | put_user(compat_ptr(data), &cmap->green) || |
1263 | get_user(data, &cmap32->blue) || |
1264 | put_user(compat_ptr(data), &cmap->blue) || |
1265 | get_user(data, &cmap32->transp) || |
1266 | put_user(compat_ptr(data), &cmap->transp)) |
1267 | return -EFAULT; |
1268 | |
1269 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
1270 | |
1271 | if (!err) { |
1272 | if (copy_in_user(&cmap32->start, |
1273 | &cmap->start, |
1274 | 2 * sizeof(__u32))) |
1275 | err = -EFAULT; |
1276 | } |
1277 | return err; |
1278 | } |
1279 | |
1280 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, |
1281 | struct fb_fix_screeninfo32 __user *fix32) |
1282 | { |
1283 | __u32 data; |
1284 | int err; |
1285 | |
1286 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); |
1287 | |
1288 | data = (__u32) (unsigned long) fix->smem_start; |
1289 | err |= put_user(data, &fix32->smem_start); |
1290 | |
1291 | err |= put_user(fix->smem_len, &fix32->smem_len); |
1292 | err |= put_user(fix->type, &fix32->type); |
1293 | err |= put_user(fix->type_aux, &fix32->type_aux); |
1294 | err |= put_user(fix->visual, &fix32->visual); |
1295 | err |= put_user(fix->xpanstep, &fix32->xpanstep); |
1296 | err |= put_user(fix->ypanstep, &fix32->ypanstep); |
1297 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); |
1298 | err |= put_user(fix->line_length, &fix32->line_length); |
1299 | |
1300 | data = (__u32) (unsigned long) fix->mmio_start; |
1301 | err |= put_user(data, &fix32->mmio_start); |
1302 | |
1303 | err |= put_user(fix->mmio_len, &fix32->mmio_len); |
1304 | err |= put_user(fix->accel, &fix32->accel); |
1305 | err |= copy_to_user(fix32->reserved, fix->reserved, |
1306 | sizeof(fix->reserved)); |
1307 | |
1308 | return err; |
1309 | } |
1310 | |
1311 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1312 | unsigned long arg) |
1313 | { |
1314 | mm_segment_t old_fs; |
1315 | struct fb_fix_screeninfo fix; |
1316 | struct fb_fix_screeninfo32 __user *fix32; |
1317 | int err; |
1318 | |
1319 | fix32 = compat_ptr(arg); |
1320 | |
1321 | old_fs = get_fs(); |
1322 | set_fs(KERNEL_DS); |
1323 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
1324 | set_fs(old_fs); |
1325 | |
1326 | if (!err) |
1327 | err = do_fscreeninfo_to_user(&fix, fix32); |
1328 | |
1329 | return err; |
1330 | } |
1331 | |
1332 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1333 | unsigned long arg) |
1334 | { |
1335 | struct fb_info *info = file_fb_info(file); |
1336 | struct fb_ops *fb; |
1337 | long ret = -ENOIOCTLCMD; |
1338 | |
1339 | if (!info) |
1340 | return -ENODEV; |
1341 | fb = info->fbops; |
1342 | switch(cmd) { |
1343 | case FBIOGET_VSCREENINFO: |
1344 | case FBIOPUT_VSCREENINFO: |
1345 | case FBIOPAN_DISPLAY: |
1346 | case FBIOGET_CON2FBMAP: |
1347 | case FBIOPUT_CON2FBMAP: |
1348 | arg = (unsigned long) compat_ptr(arg); |
1349 | case FBIOBLANK: |
1350 | ret = do_fb_ioctl(info, cmd, arg); |
1351 | break; |
1352 | |
1353 | case FBIOGET_FSCREENINFO: |
1354 | ret = fb_get_fscreeninfo(info, cmd, arg); |
1355 | break; |
1356 | |
1357 | case FBIOGETCMAP: |
1358 | case FBIOPUTCMAP: |
1359 | ret = fb_getput_cmap(info, cmd, arg); |
1360 | break; |
1361 | |
1362 | default: |
1363 | if (fb->fb_compat_ioctl) |
1364 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
1365 | break; |
1366 | } |
1367 | return ret; |
1368 | } |
1369 | #endif |
1370 | |
1371 | static int |
1372 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1373 | { |
1374 | struct fb_info *info = file_fb_info(file); |
1375 | struct fb_ops *fb; |
1376 | unsigned long mmio_pgoff; |
1377 | unsigned long start; |
1378 | u32 len; |
1379 | |
1380 | if (!info) |
1381 | return -ENODEV; |
1382 | fb = info->fbops; |
1383 | if (!fb) |
1384 | return -ENODEV; |
1385 | mutex_lock(&info->mm_lock); |
1386 | if (fb->fb_mmap) { |
1387 | int res; |
1388 | res = fb->fb_mmap(info, vma); |
1389 | mutex_unlock(&info->mm_lock); |
1390 | return res; |
1391 | } |
1392 | |
1393 | /* |
1394 | * Ugh. This can be either the frame buffer mapping, or |
1395 | * if pgoff points past it, the mmio mapping. |
1396 | */ |
1397 | start = info->fix.smem_start; |
1398 | len = info->fix.smem_len; |
1399 | mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; |
1400 | if (vma->vm_pgoff >= mmio_pgoff) { |
1401 | vma->vm_pgoff -= mmio_pgoff; |
1402 | start = info->fix.mmio_start; |
1403 | len = info->fix.mmio_len; |
1404 | } |
1405 | mutex_unlock(&info->mm_lock); |
1406 | |
1407 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
1408 | fb_pgprotect(file, vma, start); |
1409 | |
1410 | return vm_iomap_memory(vma, start, len); |
1411 | } |
1412 | |
1413 | static int |
1414 | fb_open(struct inode *inode, struct file *file) |
1415 | __acquires(&info->lock) |
1416 | __releases(&info->lock) |
1417 | { |
1418 | int fbidx = iminor(inode); |
1419 | struct fb_info *info; |
1420 | int res = 0; |
1421 | |
1422 | info = get_fb_info(fbidx); |
1423 | if (!info) { |
1424 | request_module("fb%d", fbidx); |
1425 | info = get_fb_info(fbidx); |
1426 | if (!info) |
1427 | return -ENODEV; |
1428 | } |
1429 | if (IS_ERR(info)) |
1430 | return PTR_ERR(info); |
1431 | |
1432 | mutex_lock(&info->lock); |
1433 | if (!try_module_get(info->fbops->owner)) { |
1434 | res = -ENODEV; |
1435 | goto out; |
1436 | } |
1437 | file->private_data = info; |
1438 | if (info->fbops->fb_open) { |
1439 | res = info->fbops->fb_open(info,1); |
1440 | if (res) |
1441 | module_put(info->fbops->owner); |
1442 | } |
1443 | #ifdef CONFIG_FB_DEFERRED_IO |
1444 | if (info->fbdefio) |
1445 | fb_deferred_io_open(info, inode, file); |
1446 | #endif |
1447 | out: |
1448 | mutex_unlock(&info->lock); |
1449 | if (res) |
1450 | put_fb_info(info); |
1451 | return res; |
1452 | } |
1453 | |
1454 | static int |
1455 | fb_release(struct inode *inode, struct file *file) |
1456 | __acquires(&info->lock) |
1457 | __releases(&info->lock) |
1458 | { |
1459 | struct fb_info * const info = file->private_data; |
1460 | |
1461 | mutex_lock(&info->lock); |
1462 | if (info->fbops->fb_release) |
1463 | info->fbops->fb_release(info,1); |
1464 | module_put(info->fbops->owner); |
1465 | mutex_unlock(&info->lock); |
1466 | put_fb_info(info); |
1467 | return 0; |
1468 | } |
1469 | |
1470 | static const struct file_operations fb_fops = { |
1471 | .owner = THIS_MODULE, |
1472 | .read = fb_read, |
1473 | .write = fb_write, |
1474 | .unlocked_ioctl = fb_ioctl, |
1475 | #ifdef CONFIG_COMPAT |
1476 | .compat_ioctl = fb_compat_ioctl, |
1477 | #endif |
1478 | .mmap = fb_mmap, |
1479 | .open = fb_open, |
1480 | .release = fb_release, |
1481 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA |
1482 | .get_unmapped_area = get_fb_unmapped_area, |
1483 | #endif |
1484 | #ifdef CONFIG_FB_DEFERRED_IO |
1485 | .fsync = fb_deferred_io_fsync, |
1486 | #endif |
1487 | .llseek = default_llseek, |
1488 | }; |
1489 | |
1490 | struct class *fb_class; |
1491 | EXPORT_SYMBOL(fb_class); |
1492 | |
1493 | static int fb_check_foreignness(struct fb_info *fi) |
1494 | { |
1495 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; |
1496 | |
1497 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; |
1498 | |
1499 | #ifdef __BIG_ENDIAN |
1500 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; |
1501 | #else |
1502 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; |
1503 | #endif /* __BIG_ENDIAN */ |
1504 | |
1505 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { |
1506 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " |
1507 | "support this framebuffer\n", fi->fix.id); |
1508 | return -ENOSYS; |
1509 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { |
1510 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " |
1511 | "support this framebuffer\n", fi->fix.id); |
1512 | return -ENOSYS; |
1513 | } |
1514 | |
1515 | return 0; |
1516 | } |
1517 | |
1518 | static bool apertures_overlap(struct aperture *gen, struct aperture *hw) |
1519 | { |
1520 | /* is the generic aperture base the same as the HW one */ |
1521 | if (gen->base == hw->base) |
1522 | return true; |
1523 | /* is the generic aperture base inside the hw base->hw base+size */ |
1524 | if (gen->base > hw->base && gen->base < hw->base + hw->size) |
1525 | return true; |
1526 | return false; |
1527 | } |
1528 | |
1529 | static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
1530 | struct apertures_struct *hwa) |
1531 | { |
1532 | int i, j; |
1533 | if (!hwa || !gena) |
1534 | return false; |
1535 | |
1536 | for (i = 0; i < hwa->count; ++i) { |
1537 | struct aperture *h = &hwa->ranges[i]; |
1538 | for (j = 0; j < gena->count; ++j) { |
1539 | struct aperture *g = &gena->ranges[j]; |
1540 | printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", |
1541 | (unsigned long long)g->base, |
1542 | (unsigned long long)g->size, |
1543 | (unsigned long long)h->base, |
1544 | (unsigned long long)h->size); |
1545 | if (apertures_overlap(g, h)) |
1546 | return true; |
1547 | } |
1548 | } |
1549 | |
1550 | return false; |
1551 | } |
1552 | |
1553 | static int do_unregister_framebuffer(struct fb_info *fb_info); |
1554 | |
1555 | #define VGA_FB_PHYS 0xA0000 |
1556 | static void do_remove_conflicting_framebuffers(struct apertures_struct *a, |
1557 | const char *name, bool primary) |
1558 | { |
1559 | int i; |
1560 | |
1561 | /* check all firmware fbs and kick off if the base addr overlaps */ |
1562 | for (i = 0 ; i < FB_MAX; i++) { |
1563 | struct apertures_struct *gen_aper; |
1564 | if (!registered_fb[i]) |
1565 | continue; |
1566 | |
1567 | if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) |
1568 | continue; |
1569 | |
1570 | gen_aper = registered_fb[i]->apertures; |
1571 | if (fb_do_apertures_overlap(gen_aper, a) || |
1572 | (primary && gen_aper && gen_aper->count && |
1573 | gen_aper->ranges[0].base == VGA_FB_PHYS)) { |
1574 | |
1575 | printk(KERN_INFO "fb: conflicting fb hw usage " |
1576 | "%s vs %s - removing generic driver\n", |
1577 | name, registered_fb[i]->fix.id); |
1578 | do_unregister_framebuffer(registered_fb[i]); |
1579 | } |
1580 | } |
1581 | } |
1582 | |
1583 | static int do_register_framebuffer(struct fb_info *fb_info) |
1584 | { |
1585 | int i; |
1586 | struct fb_event event; |
1587 | struct fb_videomode mode; |
1588 | |
1589 | if (fb_check_foreignness(fb_info)) |
1590 | return -ENOSYS; |
1591 | |
1592 | do_remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id, |
1593 | fb_is_primary_device(fb_info)); |
1594 | |
1595 | if (num_registered_fb == FB_MAX) |
1596 | return -ENXIO; |
1597 | |
1598 | num_registered_fb++; |
1599 | for (i = 0 ; i < FB_MAX; i++) |
1600 | if (!registered_fb[i]) |
1601 | break; |
1602 | fb_info->node = i; |
1603 | atomic_set(&fb_info->count, 1); |
1604 | mutex_init(&fb_info->lock); |
1605 | mutex_init(&fb_info->mm_lock); |
1606 | |
1607 | fb_info->dev = device_create(fb_class, fb_info->device, |
1608 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); |
1609 | if (IS_ERR(fb_info->dev)) { |
1610 | /* Not fatal */ |
1611 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1612 | fb_info->dev = NULL; |
1613 | } else |
1614 | fb_init_device(fb_info); |
1615 | |
1616 | if (fb_info->pixmap.addr == NULL) { |
1617 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); |
1618 | if (fb_info->pixmap.addr) { |
1619 | fb_info->pixmap.size = FBPIXMAPSIZE; |
1620 | fb_info->pixmap.buf_align = 1; |
1621 | fb_info->pixmap.scan_align = 1; |
1622 | fb_info->pixmap.access_align = 32; |
1623 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1624 | } |
1625 | } |
1626 | fb_info->pixmap.offset = 0; |
1627 | |
1628 | if (!fb_info->pixmap.blit_x) |
1629 | fb_info->pixmap.blit_x = ~(u32)0; |
1630 | |
1631 | if (!fb_info->pixmap.blit_y) |
1632 | fb_info->pixmap.blit_y = ~(u32)0; |
1633 | |
1634 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1635 | INIT_LIST_HEAD(&fb_info->modelist); |
1636 | |
1637 | fb_var_to_videomode(&mode, &fb_info->var); |
1638 | fb_add_videomode(&mode, &fb_info->modelist); |
1639 | registered_fb[i] = fb_info; |
1640 | |
1641 | event.info = fb_info; |
1642 | if (!lock_fb_info(fb_info)) |
1643 | return -ENODEV; |
1644 | console_lock(); |
1645 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1646 | console_unlock(); |
1647 | unlock_fb_info(fb_info); |
1648 | return 0; |
1649 | } |
1650 | |
1651 | static int do_unregister_framebuffer(struct fb_info *fb_info) |
1652 | { |
1653 | struct fb_event event; |
1654 | int i, ret = 0; |
1655 | |
1656 | i = fb_info->node; |
1657 | if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) |
1658 | return -EINVAL; |
1659 | |
1660 | if (!lock_fb_info(fb_info)) |
1661 | return -ENODEV; |
1662 | console_lock(); |
1663 | event.info = fb_info; |
1664 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); |
1665 | console_unlock(); |
1666 | unlock_fb_info(fb_info); |
1667 | |
1668 | if (ret) |
1669 | return -EINVAL; |
1670 | |
1671 | unlink_framebuffer(fb_info); |
1672 | if (fb_info->pixmap.addr && |
1673 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) |
1674 | kfree(fb_info->pixmap.addr); |
1675 | fb_destroy_modelist(&fb_info->modelist); |
1676 | registered_fb[i] = NULL; |
1677 | num_registered_fb--; |
1678 | fb_cleanup_device(fb_info); |
1679 | event.info = fb_info; |
1680 | console_lock(); |
1681 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
1682 | console_unlock(); |
1683 | |
1684 | /* this may free fb info */ |
1685 | put_fb_info(fb_info); |
1686 | return 0; |
1687 | } |
1688 | |
1689 | int unlink_framebuffer(struct fb_info *fb_info) |
1690 | { |
1691 | int i; |
1692 | |
1693 | i = fb_info->node; |
1694 | if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) |
1695 | return -EINVAL; |
1696 | |
1697 | if (fb_info->dev) { |
1698 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1699 | fb_info->dev = NULL; |
1700 | } |
1701 | return 0; |
1702 | } |
1703 | EXPORT_SYMBOL(unlink_framebuffer); |
1704 | |
1705 | void remove_conflicting_framebuffers(struct apertures_struct *a, |
1706 | const char *name, bool primary) |
1707 | { |
1708 | mutex_lock(®istration_lock); |
1709 | do_remove_conflicting_framebuffers(a, name, primary); |
1710 | mutex_unlock(®istration_lock); |
1711 | } |
1712 | EXPORT_SYMBOL(remove_conflicting_framebuffers); |
1713 | |
1714 | /** |
1715 | * register_framebuffer - registers a frame buffer device |
1716 | * @fb_info: frame buffer info structure |
1717 | * |
1718 | * Registers a frame buffer device @fb_info. |
1719 | * |
1720 | * Returns negative errno on error, or zero for success. |
1721 | * |
1722 | */ |
1723 | int |
1724 | register_framebuffer(struct fb_info *fb_info) |
1725 | { |
1726 | int ret; |
1727 | |
1728 | mutex_lock(®istration_lock); |
1729 | ret = do_register_framebuffer(fb_info); |
1730 | mutex_unlock(®istration_lock); |
1731 | |
1732 | return ret; |
1733 | } |
1734 | |
1735 | /** |
1736 | * unregister_framebuffer - releases a frame buffer device |
1737 | * @fb_info: frame buffer info structure |
1738 | * |
1739 | * Unregisters a frame buffer device @fb_info. |
1740 | * |
1741 | * Returns negative errno on error, or zero for success. |
1742 | * |
1743 | * This function will also notify the framebuffer console |
1744 | * to release the driver. |
1745 | * |
1746 | * This is meant to be called within a driver's module_exit() |
1747 | * function. If this is called outside module_exit(), ensure |
1748 | * that the driver implements fb_open() and fb_release() to |
1749 | * check that no processes are using the device. |
1750 | */ |
1751 | int |
1752 | unregister_framebuffer(struct fb_info *fb_info) |
1753 | { |
1754 | int ret; |
1755 | |
1756 | mutex_lock(®istration_lock); |
1757 | ret = do_unregister_framebuffer(fb_info); |
1758 | mutex_unlock(®istration_lock); |
1759 | |
1760 | return ret; |
1761 | } |
1762 | |
1763 | /** |
1764 | * fb_set_suspend - low level driver signals suspend |
1765 | * @info: framebuffer affected |
1766 | * @state: 0 = resuming, !=0 = suspending |
1767 | * |
1768 | * This is meant to be used by low level drivers to |
1769 | * signal suspend/resume to the core & clients. |
1770 | * It must be called with the console semaphore held |
1771 | */ |
1772 | void fb_set_suspend(struct fb_info *info, int state) |
1773 | { |
1774 | struct fb_event event; |
1775 | |
1776 | event.info = info; |
1777 | if (state) { |
1778 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1779 | info->state = FBINFO_STATE_SUSPENDED; |
1780 | } else { |
1781 | info->state = FBINFO_STATE_RUNNING; |
1782 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1783 | } |
1784 | } |
1785 | |
1786 | /** |
1787 | * fbmem_init - init frame buffer subsystem |
1788 | * |
1789 | * Initialize the frame buffer subsystem. |
1790 | * |
1791 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. |
1792 | * |
1793 | */ |
1794 | |
1795 | static int __init |
1796 | fbmem_init(void) |
1797 | { |
1798 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1799 | |
1800 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1801 | printk("unable to get major %d for fb devs\n", FB_MAJOR); |
1802 | |
1803 | fb_class = class_create(THIS_MODULE, "graphics"); |
1804 | if (IS_ERR(fb_class)) { |
1805 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); |
1806 | fb_class = NULL; |
1807 | } |
1808 | return 0; |
1809 | } |
1810 | |
1811 | #ifdef MODULE |
1812 | module_init(fbmem_init); |
1813 | static void __exit |
1814 | fbmem_exit(void) |
1815 | { |
1816 | remove_proc_entry("fb", NULL); |
1817 | class_destroy(fb_class); |
1818 | unregister_chrdev(FB_MAJOR, "fb"); |
1819 | } |
1820 | |
1821 | module_exit(fbmem_exit); |
1822 | MODULE_LICENSE("GPL"); |
1823 | MODULE_DESCRIPTION("Framebuffer base"); |
1824 | #else |
1825 | subsys_initcall(fbmem_init); |
1826 | #endif |
1827 | |
1828 | int fb_new_modelist(struct fb_info *info) |
1829 | { |
1830 | struct fb_event event; |
1831 | struct fb_var_screeninfo var = info->var; |
1832 | struct list_head *pos, *n; |
1833 | struct fb_modelist *modelist; |
1834 | struct fb_videomode *m, mode; |
1835 | int err = 1; |
1836 | |
1837 | list_for_each_safe(pos, n, &info->modelist) { |
1838 | modelist = list_entry(pos, struct fb_modelist, list); |
1839 | m = &modelist->mode; |
1840 | fb_videomode_to_var(&var, m); |
1841 | var.activate = FB_ACTIVATE_TEST; |
1842 | err = fb_set_var(info, &var); |
1843 | fb_var_to_videomode(&mode, &var); |
1844 | if (err || !fb_mode_is_equal(m, &mode)) { |
1845 | list_del(pos); |
1846 | kfree(pos); |
1847 | } |
1848 | } |
1849 | |
1850 | err = 1; |
1851 | |
1852 | if (!list_empty(&info->modelist)) { |
1853 | event.info = info; |
1854 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1855 | } |
1856 | |
1857 | return err; |
1858 | } |
1859 | |
1860 | static char *video_options[FB_MAX] __read_mostly; |
1861 | static int ofonly __read_mostly; |
1862 | |
1863 | /** |
1864 | * fb_get_options - get kernel boot parameters |
1865 | * @name: framebuffer name as it would appear in |
1866 | * the boot parameter line |
1867 | * (video=<name>:<options>) |
1868 | * @option: the option will be stored here |
1869 | * |
1870 | * NOTE: Needed to maintain backwards compatibility |
1871 | */ |
1872 | int fb_get_options(char *name, char **option) |
1873 | { |
1874 | char *opt, *options = NULL; |
1875 | int retval = 0; |
1876 | int name_len = strlen(name), i; |
1877 | |
1878 | if (name_len && ofonly && strncmp(name, "offb", 4)) |
1879 | retval = 1; |
1880 | |
1881 | if (name_len && !retval) { |
1882 | for (i = 0; i < FB_MAX; i++) { |
1883 | if (video_options[i] == NULL) |
1884 | continue; |
1885 | if (!video_options[i][0]) |
1886 | continue; |
1887 | opt = video_options[i]; |
1888 | if (!strncmp(name, opt, name_len) && |
1889 | opt[name_len] == ':') |
1890 | options = opt + name_len + 1; |
1891 | } |
1892 | } |
1893 | if (options && !strncmp(options, "off", 3)) |
1894 | retval = 1; |
1895 | |
1896 | if (option) |
1897 | *option = options; |
1898 | |
1899 | return retval; |
1900 | } |
1901 | |
1902 | #ifndef MODULE |
1903 | /** |
1904 | * video_setup - process command line options |
1905 | * @options: string of options |
1906 | * |
1907 | * Process command line options for frame buffer subsystem. |
1908 | * |
1909 | * NOTE: This function is a __setup and __init function. |
1910 | * It only stores the options. Drivers have to call |
1911 | * fb_get_options() as necessary. |
1912 | * |
1913 | * Returns zero. |
1914 | * |
1915 | */ |
1916 | static int __init video_setup(char *options) |
1917 | { |
1918 | int i, global = 0; |
1919 | |
1920 | if (!options || !*options) |
1921 | global = 1; |
1922 | |
1923 | if (!global && !strncmp(options, "ofonly", 6)) { |
1924 | ofonly = 1; |
1925 | global = 1; |
1926 | } |
1927 | |
1928 | if (!global && !strchr(options, ':')) { |
1929 | fb_mode_option = options; |
1930 | global = 1; |
1931 | } |
1932 | |
1933 | if (!global) { |
1934 | for (i = 0; i < FB_MAX; i++) { |
1935 | if (video_options[i] == NULL) { |
1936 | video_options[i] = options; |
1937 | break; |
1938 | } |
1939 | |
1940 | } |
1941 | } |
1942 | |
1943 | return 1; |
1944 | } |
1945 | __setup("video=", video_setup); |
1946 | #endif |
1947 | |
1948 | /* |
1949 | * Visible symbols for modules |
1950 | */ |
1951 | |
1952 | EXPORT_SYMBOL(register_framebuffer); |
1953 | EXPORT_SYMBOL(unregister_framebuffer); |
1954 | EXPORT_SYMBOL(num_registered_fb); |
1955 | EXPORT_SYMBOL(registered_fb); |
1956 | EXPORT_SYMBOL(fb_show_logo); |
1957 | EXPORT_SYMBOL(fb_set_var); |
1958 | EXPORT_SYMBOL(fb_blank); |
1959 | EXPORT_SYMBOL(fb_pan_display); |
1960 | EXPORT_SYMBOL(fb_get_buffer_offset); |
1961 | EXPORT_SYMBOL(fb_set_suspend); |
1962 | EXPORT_SYMBOL(fb_get_options); |
1963 | |
1964 | MODULE_LICENSE("GPL"); |
1965 |
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