Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/smp_lock.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/mman.h> | |
a8f340e3 | 25 | #include <linux/vt.h> |
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/linux_logo.h> | |
28 | #include <linux/proc_fs.h> | |
0aa16341 | 29 | #include <linux/seq_file.h> |
1da177e4 LT |
30 | #include <linux/console.h> |
31 | #ifdef CONFIG_KMOD | |
32 | #include <linux/kmod.h> | |
33 | #endif | |
1da177e4 | 34 | #include <linux/err.h> |
1da177e4 LT |
35 | #include <linux/device.h> |
36 | #include <linux/efi.h> | |
10eb2659 | 37 | #include <linux/fb.h> |
1da177e4 | 38 | |
10eb2659 | 39 | #include <asm/fb.h> |
1da177e4 | 40 | |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Frame buffer device initialization and setup routines | |
44 | */ | |
45 | ||
46 | #define FBPIXMAPSIZE (1024 * 8) | |
47 | ||
0128beee HD |
48 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
49 | int num_registered_fb __read_mostly; | |
1da177e4 LT |
50 | |
51 | /* | |
52 | * Helpers | |
53 | */ | |
54 | ||
b8c90945 AD |
55 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
56 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 57 | { |
b8c90945 AD |
58 | int depth = 0; |
59 | ||
60 | if (fix->visual == FB_VISUAL_MONO01 || | |
61 | fix->visual == FB_VISUAL_MONO10) | |
62 | depth = 1; | |
63 | else { | |
64 | if (var->green.length == var->blue.length && | |
65 | var->green.length == var->red.length && | |
66 | var->green.offset == var->blue.offset && | |
67 | var->green.offset == var->red.offset) | |
68 | depth = var->green.length; | |
69 | else | |
70 | depth = var->green.length + var->red.length + | |
71 | var->blue.length; | |
72 | } | |
73 | ||
74 | return depth; | |
1da177e4 LT |
75 | } |
76 | EXPORT_SYMBOL(fb_get_color_depth); | |
77 | ||
78 | /* | |
f5a9951c | 79 | * Data padding functions. |
1da177e4 | 80 | */ |
f1ab5dac | 81 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 82 | { |
829e79b6 | 83 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 84 | } |
f1ab5dac | 85 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 86 | |
f1ab5dac JS |
87 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
88 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
89 | { |
90 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
91 | int i, j; | |
92 | ||
93 | for (i = height; i--; ) { | |
94 | for (j = 0; j < idx; j++) { | |
95 | tmp = dst[j]; | |
96 | tmp &= mask; | |
97 | tmp |= *src >> shift_low; | |
98 | dst[j] = tmp; | |
99 | tmp = *src << shift_high; | |
100 | dst[j+1] = tmp; | |
101 | src++; | |
102 | } | |
103 | tmp = dst[idx]; | |
104 | tmp &= mask; | |
105 | tmp |= *src >> shift_low; | |
106 | dst[idx] = tmp; | |
107 | if (shift_high < mod) { | |
108 | tmp = *src << shift_high; | |
109 | dst[idx+1] = tmp; | |
110 | } | |
111 | src++; | |
112 | dst += d_pitch; | |
113 | } | |
114 | } | |
f1ab5dac | 115 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
116 | |
117 | /* | |
118 | * we need to lock this section since fb_cursor | |
119 | * may use fb_imageblit() | |
120 | */ | |
121 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
122 | { | |
123 | u32 align = buf->buf_align - 1, offset; | |
124 | char *addr = buf->addr; | |
125 | ||
126 | /* If IO mapped, we need to sync before access, no sharing of | |
127 | * the pixmap is done | |
128 | */ | |
129 | if (buf->flags & FB_PIXMAP_IO) { | |
130 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
131 | info->fbops->fb_sync(info); | |
132 | return addr; | |
133 | } | |
134 | ||
135 | /* See if we fit in the remaining pixmap space */ | |
136 | offset = buf->offset + align; | |
137 | offset &= ~align; | |
138 | if (offset + size > buf->size) { | |
139 | /* We do not fit. In order to be able to re-use the buffer, | |
140 | * we must ensure no asynchronous DMA'ing or whatever operation | |
141 | * is in progress, we sync for that. | |
142 | */ | |
143 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
144 | info->fbops->fb_sync(info); | |
145 | offset = 0; | |
146 | } | |
147 | buf->offset = offset + size; | |
148 | addr += offset; | |
149 | ||
150 | return addr; | |
151 | } | |
152 | ||
153 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
154 | |
155 | static inline unsigned safe_shift(unsigned d, int n) | |
156 | { | |
157 | return n < 0 ? d >> -n : d << n; | |
158 | } | |
159 | ||
160 | static void fb_set_logocmap(struct fb_info *info, | |
161 | const struct linux_logo *logo) | |
162 | { | |
163 | struct fb_cmap palette_cmap; | |
164 | u16 palette_green[16]; | |
165 | u16 palette_blue[16]; | |
166 | u16 palette_red[16]; | |
167 | int i, j, n; | |
168 | const unsigned char *clut = logo->clut; | |
169 | ||
170 | palette_cmap.start = 0; | |
171 | palette_cmap.len = 16; | |
172 | palette_cmap.red = palette_red; | |
173 | palette_cmap.green = palette_green; | |
174 | palette_cmap.blue = palette_blue; | |
175 | palette_cmap.transp = NULL; | |
176 | ||
177 | for (i = 0; i < logo->clutsize; i += n) { | |
178 | n = logo->clutsize - i; | |
179 | /* palette_cmap provides space for only 16 colors at once */ | |
180 | if (n > 16) | |
181 | n = 16; | |
182 | palette_cmap.start = 32 + i; | |
183 | palette_cmap.len = n; | |
184 | for (j = 0; j < n; ++j) { | |
185 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
186 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
187 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
188 | clut += 3; | |
189 | } | |
190 | fb_set_cmap(&palette_cmap, info); | |
191 | } | |
192 | } | |
193 | ||
194 | static void fb_set_logo_truepalette(struct fb_info *info, | |
195 | const struct linux_logo *logo, | |
196 | u32 *palette) | |
197 | { | |
0128beee | 198 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
199 | unsigned char redmask, greenmask, bluemask; |
200 | int redshift, greenshift, blueshift; | |
201 | int i; | |
202 | const unsigned char *clut = logo->clut; | |
203 | ||
204 | /* | |
205 | * We have to create a temporary palette since console palette is only | |
206 | * 16 colors long. | |
207 | */ | |
208 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
209 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
210 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
211 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
212 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
213 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
214 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
215 | ||
216 | for ( i = 0; i < logo->clutsize; i++) { | |
217 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
218 | safe_shift((clut[1] & greenmask), greenshift) | | |
219 | safe_shift((clut[2] & bluemask), blueshift)); | |
220 | clut += 3; | |
221 | } | |
222 | } | |
223 | ||
224 | static void fb_set_logo_directpalette(struct fb_info *info, | |
225 | const struct linux_logo *logo, | |
226 | u32 *palette) | |
227 | { | |
228 | int redshift, greenshift, blueshift; | |
229 | int i; | |
230 | ||
231 | redshift = info->var.red.offset; | |
232 | greenshift = info->var.green.offset; | |
233 | blueshift = info->var.blue.offset; | |
234 | ||
235 | for (i = 32; i < logo->clutsize; i++) | |
236 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
237 | } | |
238 | ||
239 | static void fb_set_logo(struct fb_info *info, | |
240 | const struct linux_logo *logo, u8 *dst, | |
241 | int depth) | |
242 | { | |
b8c90945 | 243 | int i, j, k; |
1da177e4 | 244 | const u8 *src = logo->data; |
b8c90945 AD |
245 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
246 | u8 fg = 1, d; | |
1da177e4 | 247 | |
1692b37c AD |
248 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
249 | case 1: | |
250 | fg = 1; | |
251 | break; | |
252 | case 2: | |
253 | fg = 3; | |
254 | break; | |
255 | default: | |
1da177e4 | 256 | fg = 7; |
1692b37c AD |
257 | break; |
258 | } | |
1da177e4 | 259 | |
b8c90945 AD |
260 | if (info->fix.visual == FB_VISUAL_MONO01 || |
261 | info->fix.visual == FB_VISUAL_MONO10) | |
262 | fg = ~((u8) (0xfff << info->var.green.length)); | |
263 | ||
1da177e4 LT |
264 | switch (depth) { |
265 | case 4: | |
266 | for (i = 0; i < logo->height; i++) | |
267 | for (j = 0; j < logo->width; src++) { | |
268 | *dst++ = *src >> 4; | |
269 | j++; | |
270 | if (j < logo->width) { | |
271 | *dst++ = *src & 0x0f; | |
272 | j++; | |
273 | } | |
274 | } | |
275 | break; | |
276 | case 1: | |
277 | for (i = 0; i < logo->height; i++) { | |
278 | for (j = 0; j < logo->width; src++) { | |
279 | d = *src ^ xor; | |
280 | for (k = 7; k >= 0; k--) { | |
281 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
282 | j++; | |
283 | } | |
284 | } | |
285 | } | |
286 | break; | |
287 | } | |
288 | } | |
289 | ||
290 | /* | |
291 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
292 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
293 | * the visual format and color depth of the framebuffer, the DAC, the | |
294 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
295 | * | |
296 | * Case 1 - linux_logo_clut224: | |
297 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
298 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
299 | * | |
300 | * For visuals that require color info from the pseudo_palette, we also construct | |
301 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
302 | * will be set. | |
303 | * | |
304 | * Case 2 - linux_logo_vga16: | |
305 | * The number of colors just matches the console colors, thus there is no need | |
306 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
307 | * each byte contains color information for two pixels (upper and lower nibble). | |
308 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
309 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
310 | * | |
311 | * Case 3 - linux_logo_mono: | |
312 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
313 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
314 | * be set to 1. | |
315 | */ | |
316 | static struct logo_data { | |
317 | int depth; | |
318 | int needs_directpalette; | |
319 | int needs_truepalette; | |
320 | int needs_cmapreset; | |
321 | const struct linux_logo *logo; | |
0128beee | 322 | } fb_logo __read_mostly; |
1da177e4 | 323 | |
9c44e5f6 AD |
324 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
325 | { | |
326 | u32 size = width * height, i; | |
327 | ||
328 | out += size - 1; | |
329 | ||
330 | for (i = size; i--; ) | |
331 | *out-- = *in++; | |
332 | } | |
333 | ||
334 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
335 | { | |
f837e6f7 | 336 | int i, j, h = height - 1; |
9c44e5f6 AD |
337 | |
338 | for (i = 0; i < height; i++) | |
339 | for (j = 0; j < width; j++) | |
f837e6f7 | 340 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
341 | } |
342 | ||
343 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
344 | { | |
345 | int i, j, w = width - 1; | |
346 | ||
347 | for (i = 0; i < height; i++) | |
348 | for (j = 0; j < width; j++) | |
349 | out[height * (w - j) + i] = *in++; | |
350 | } | |
351 | ||
352 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
353 | struct fb_image *image, int rotate) | |
354 | { | |
355 | u32 tmp; | |
356 | ||
357 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
358 | fb_rotate_logo_ud(image->data, dst, image->width, |
359 | image->height); | |
abed5d15 GU |
360 | image->dx = info->var.xres - image->width - image->dx; |
361 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 362 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
363 | fb_rotate_logo_cw(image->data, dst, image->width, |
364 | image->height); | |
9c44e5f6 AD |
365 | tmp = image->width; |
366 | image->width = image->height; | |
367 | image->height = tmp; | |
abed5d15 GU |
368 | tmp = image->dy; |
369 | image->dy = image->dx; | |
370 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 371 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
372 | fb_rotate_logo_ccw(image->data, dst, image->width, |
373 | image->height); | |
f837e6f7 AD |
374 | tmp = image->width; |
375 | image->width = image->height; | |
376 | image->height = tmp; | |
abed5d15 GU |
377 | tmp = image->dx; |
378 | image->dx = image->dy; | |
379 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
380 | } |
381 | ||
382 | image->data = dst; | |
383 | } | |
384 | ||
385 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 386 | int rotate, unsigned int num) |
9c44e5f6 | 387 | { |
448d4797 | 388 | unsigned int x; |
9c44e5f6 AD |
389 | |
390 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
391 | for (x = 0; |
392 | x < num && image->dx + image->width <= info->var.xres; | |
393 | x++) { | |
9c44e5f6 | 394 | info->fbops->fb_imageblit(info, image); |
448d4797 | 395 | image->dx += image->width + 8; |
9c44e5f6 AD |
396 | } |
397 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 398 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 399 | info->fbops->fb_imageblit(info, image); |
448d4797 | 400 | image->dx -= image->width + 8; |
9c44e5f6 AD |
401 | } |
402 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
403 | for (x = 0; |
404 | x < num && image->dy + image->height <= info->var.yres; | |
405 | x++) { | |
9c44e5f6 | 406 | info->fbops->fb_imageblit(info, image); |
448d4797 | 407 | image->dy += image->height + 8; |
9c44e5f6 AD |
408 | } |
409 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 410 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 411 | info->fbops->fb_imageblit(info, image); |
448d4797 | 412 | image->dy -= image->height + 8; |
9c44e5f6 AD |
413 | } |
414 | } | |
415 | } | |
416 | ||
90da63e5 GU |
417 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
418 | const struct linux_logo *logo, int y, | |
419 | unsigned int n) | |
1da177e4 LT |
420 | { |
421 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 422 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 423 | struct fb_image image; |
1da177e4 LT |
424 | |
425 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 426 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 427 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
428 | return 0; |
429 | ||
430 | image.depth = 8; | |
90da63e5 | 431 | image.data = logo->data; |
1da177e4 LT |
432 | |
433 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 434 | fb_set_logocmap(info, logo); |
1da177e4 | 435 | |
9900abfb | 436 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
437 | fb_logo.needs_directpalette) { |
438 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
439 | if (palette == NULL) | |
440 | return 0; | |
441 | ||
442 | if (fb_logo.needs_truepalette) | |
90da63e5 | 443 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 444 | else |
90da63e5 | 445 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
446 | |
447 | saved_pseudo_palette = info->pseudo_palette; | |
448 | info->pseudo_palette = palette; | |
449 | } | |
450 | ||
451 | if (fb_logo.depth <= 4) { | |
90da63e5 | 452 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
453 | if (logo_new == NULL) { |
454 | kfree(palette); | |
455 | if (saved_pseudo_palette) | |
456 | info->pseudo_palette = saved_pseudo_palette; | |
457 | return 0; | |
458 | } | |
459 | image.data = logo_new; | |
90da63e5 | 460 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
461 | } |
462 | ||
9c44e5f6 | 463 | image.dx = 0; |
90da63e5 GU |
464 | image.dy = y; |
465 | image.width = logo->width; | |
466 | image.height = logo->height; | |
1da177e4 | 467 | |
9c44e5f6 | 468 | if (rotate) { |
90da63e5 GU |
469 | logo_rotate = kmalloc(logo->width * |
470 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
471 | if (logo_rotate) |
472 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 473 | } |
9c44e5f6 | 474 | |
90da63e5 | 475 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 476 | |
1da177e4 LT |
477 | kfree(palette); |
478 | if (saved_pseudo_palette != NULL) | |
479 | info->pseudo_palette = saved_pseudo_palette; | |
480 | kfree(logo_new); | |
9c44e5f6 | 481 | kfree(logo_rotate); |
90da63e5 GU |
482 | return logo->height; |
483 | } | |
484 | ||
9900abfb GU |
485 | |
486 | #ifdef CONFIG_FB_LOGO_EXTRA | |
487 | ||
488 | #define FB_LOGO_EX_NUM_MAX 10 | |
489 | static struct logo_data_extra { | |
490 | const struct linux_logo *logo; | |
491 | unsigned int n; | |
492 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
493 | static unsigned int fb_logo_ex_num; | |
494 | ||
495 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
496 | { | |
497 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
498 | return; | |
499 | ||
500 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
501 | fb_logo_ex[fb_logo_ex_num].n = n; | |
502 | fb_logo_ex_num++; | |
503 | } | |
504 | ||
505 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
506 | unsigned int yres) | |
507 | { | |
508 | unsigned int i; | |
509 | ||
510 | /* FIXME: logo_ex supports only truecolor fb. */ | |
511 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
512 | fb_logo_ex_num = 0; | |
513 | ||
514 | for (i = 0; i < fb_logo_ex_num; i++) { | |
515 | height += fb_logo_ex[i].logo->height; | |
516 | if (height > yres) { | |
517 | height -= fb_logo_ex[i].logo->height; | |
518 | fb_logo_ex_num = i; | |
519 | break; | |
520 | } | |
521 | } | |
522 | return height; | |
523 | } | |
524 | ||
525 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
526 | { | |
527 | unsigned int i; | |
528 | ||
529 | for (i = 0; i < fb_logo_ex_num; i++) | |
530 | y += fb_show_logo_line(info, rotate, | |
531 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
532 | ||
533 | return y; | |
534 | } | |
535 | ||
536 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
537 | ||
538 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
539 | unsigned int height, | |
540 | unsigned int yres) | |
541 | { | |
542 | return height; | |
543 | } | |
544 | ||
545 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
546 | { | |
547 | return y; | |
548 | } | |
549 | ||
550 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
551 | ||
552 | ||
553 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
554 | { | |
555 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
556 | unsigned int yres; | |
557 | ||
558 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
559 | ||
560 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
561 | info->flags & FBINFO_MODULE) | |
562 | return 0; | |
563 | ||
564 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
565 | depth = info->var.blue.length; | |
566 | if (info->var.red.length < depth) | |
567 | depth = info->var.red.length; | |
568 | if (info->var.green.length < depth) | |
569 | depth = info->var.green.length; | |
570 | } | |
571 | ||
572 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
573 | /* assume console colormap */ | |
574 | depth = 4; | |
575 | } | |
576 | ||
9900abfb GU |
577 | /* Return if no suitable logo was found */ |
578 | fb_logo.logo = fb_find_logo(depth); | |
579 | ||
580 | if (!fb_logo.logo) { | |
581 | return 0; | |
582 | } | |
583 | ||
584 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
585 | yres = info->var.yres; | |
586 | else | |
587 | yres = info->var.xres; | |
588 | ||
589 | if (fb_logo.logo->height > yres) { | |
590 | fb_logo.logo = NULL; | |
591 | return 0; | |
592 | } | |
593 | ||
594 | /* What depth we asked for might be different from what we get */ | |
595 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
596 | fb_logo.depth = 8; | |
597 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
598 | fb_logo.depth = 4; | |
599 | else | |
600 | fb_logo.depth = 1; | |
601 | ||
1692b37c AD |
602 | |
603 | if (fb_logo.depth > 4 && depth > 4) { | |
604 | switch (info->fix.visual) { | |
605 | case FB_VISUAL_TRUECOLOR: | |
606 | fb_logo.needs_truepalette = 1; | |
607 | break; | |
608 | case FB_VISUAL_DIRECTCOLOR: | |
609 | fb_logo.needs_directpalette = 1; | |
610 | fb_logo.needs_cmapreset = 1; | |
611 | break; | |
612 | case FB_VISUAL_PSEUDOCOLOR: | |
613 | fb_logo.needs_cmapreset = 1; | |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
9900abfb GU |
618 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
619 | } | |
620 | ||
90da63e5 GU |
621 | int fb_show_logo(struct fb_info *info, int rotate) |
622 | { | |
9900abfb GU |
623 | int y; |
624 | ||
625 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
626 | num_online_cpus()); | |
627 | y = fb_show_extra_logos(info, y, rotate); | |
628 | ||
629 | return y; | |
1da177e4 LT |
630 | } |
631 | #else | |
9c44e5f6 AD |
632 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
633 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
634 | #endif /* CONFIG_LOGO */ |
635 | ||
0aa16341 AD |
636 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
637 | { | |
638 | return (*pos < FB_MAX) ? pos : NULL; | |
639 | } | |
640 | ||
641 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
642 | { | |
643 | (*pos)++; | |
644 | return (*pos < FB_MAX) ? pos : NULL; | |
645 | } | |
646 | ||
647 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 648 | { |
1da177e4 LT |
649 | } |
650 | ||
0aa16341 AD |
651 | static int fb_seq_show(struct seq_file *m, void *v) |
652 | { | |
653 | int i = *(loff_t *)v; | |
654 | struct fb_info *fi = registered_fb[i]; | |
655 | ||
656 | if (fi) | |
657 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static const struct seq_operations proc_fb_seq_ops = { | |
662 | .start = fb_seq_start, | |
663 | .next = fb_seq_next, | |
664 | .stop = fb_seq_stop, | |
665 | .show = fb_seq_show, | |
666 | }; | |
667 | ||
668 | static int proc_fb_open(struct inode *inode, struct file *file) | |
669 | { | |
670 | return seq_open(file, &proc_fb_seq_ops); | |
671 | } | |
672 | ||
673 | static const struct file_operations fb_proc_fops = { | |
674 | .owner = THIS_MODULE, | |
675 | .open = proc_fb_open, | |
676 | .read = seq_read, | |
677 | .llseek = seq_lseek, | |
678 | .release = seq_release, | |
679 | }; | |
680 | ||
1da177e4 LT |
681 | static ssize_t |
682 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
683 | { | |
684 | unsigned long p = *ppos; | |
ad9a824e | 685 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
686 | int fbidx = iminor(inode); |
687 | struct fb_info *info = registered_fb[fbidx]; | |
688 | u32 *buffer, *dst; | |
689 | u32 __iomem *src; | |
690 | int c, i, cnt = 0, err = 0; | |
691 | unsigned long total_size; | |
692 | ||
693 | if (!info || ! info->screen_base) | |
694 | return -ENODEV; | |
695 | ||
696 | if (info->state != FBINFO_STATE_RUNNING) | |
697 | return -EPERM; | |
698 | ||
699 | if (info->fbops->fb_read) | |
3f9b0880 | 700 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
701 | |
702 | total_size = info->screen_size; | |
0a484a3a | 703 | |
1da177e4 LT |
704 | if (total_size == 0) |
705 | total_size = info->fix.smem_len; | |
706 | ||
707 | if (p >= total_size) | |
0a484a3a AD |
708 | return 0; |
709 | ||
1da177e4 | 710 | if (count >= total_size) |
0a484a3a AD |
711 | count = total_size; |
712 | ||
1da177e4 LT |
713 | if (count + p > total_size) |
714 | count = total_size - p; | |
715 | ||
1da177e4 LT |
716 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
717 | GFP_KERNEL); | |
718 | if (!buffer) | |
719 | return -ENOMEM; | |
720 | ||
721 | src = (u32 __iomem *) (info->screen_base + p); | |
722 | ||
723 | if (info->fbops->fb_sync) | |
724 | info->fbops->fb_sync(info); | |
725 | ||
726 | while (count) { | |
727 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
728 | dst = buffer; | |
729 | for (i = c >> 2; i--; ) | |
730 | *dst++ = fb_readl(src++); | |
731 | if (c & 3) { | |
732 | u8 *dst8 = (u8 *) dst; | |
733 | u8 __iomem *src8 = (u8 __iomem *) src; | |
734 | ||
735 | for (i = c & 3; i--;) | |
736 | *dst8++ = fb_readb(src8++); | |
737 | ||
738 | src = (u32 __iomem *) src8; | |
739 | } | |
740 | ||
741 | if (copy_to_user(buf, buffer, c)) { | |
742 | err = -EFAULT; | |
743 | break; | |
744 | } | |
745 | *ppos += c; | |
746 | buf += c; | |
747 | cnt += c; | |
748 | count -= c; | |
749 | } | |
750 | ||
751 | kfree(buffer); | |
0a484a3a | 752 | |
1da177e4 LT |
753 | return (err) ? err : cnt; |
754 | } | |
755 | ||
756 | static ssize_t | |
757 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
758 | { | |
759 | unsigned long p = *ppos; | |
ad9a824e | 760 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
761 | int fbidx = iminor(inode); |
762 | struct fb_info *info = registered_fb[fbidx]; | |
763 | u32 *buffer, *src; | |
764 | u32 __iomem *dst; | |
0a484a3a | 765 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
766 | unsigned long total_size; |
767 | ||
768 | if (!info || !info->screen_base) | |
769 | return -ENODEV; | |
770 | ||
771 | if (info->state != FBINFO_STATE_RUNNING) | |
772 | return -EPERM; | |
773 | ||
774 | if (info->fbops->fb_write) | |
3f9b0880 | 775 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
776 | |
777 | total_size = info->screen_size; | |
0a484a3a | 778 | |
1da177e4 LT |
779 | if (total_size == 0) |
780 | total_size = info->fix.smem_len; | |
781 | ||
782 | if (p > total_size) | |
6a2a8866 | 783 | return -EFBIG; |
0a484a3a | 784 | |
6a2a8866 AD |
785 | if (count > total_size) { |
786 | err = -EFBIG; | |
0a484a3a | 787 | count = total_size; |
6a2a8866 AD |
788 | } |
789 | ||
790 | if (count + p > total_size) { | |
791 | if (!err) | |
792 | err = -ENOSPC; | |
0a484a3a | 793 | |
0a484a3a | 794 | count = total_size - p; |
6a2a8866 | 795 | } |
0a484a3a | 796 | |
1da177e4 LT |
797 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
798 | GFP_KERNEL); | |
799 | if (!buffer) | |
800 | return -ENOMEM; | |
801 | ||
802 | dst = (u32 __iomem *) (info->screen_base + p); | |
803 | ||
804 | if (info->fbops->fb_sync) | |
805 | info->fbops->fb_sync(info); | |
806 | ||
807 | while (count) { | |
808 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
809 | src = buffer; | |
0a484a3a | 810 | |
1da177e4 LT |
811 | if (copy_from_user(src, buf, c)) { |
812 | err = -EFAULT; | |
813 | break; | |
814 | } | |
0a484a3a | 815 | |
1da177e4 LT |
816 | for (i = c >> 2; i--; ) |
817 | fb_writel(*src++, dst++); | |
0a484a3a | 818 | |
1da177e4 LT |
819 | if (c & 3) { |
820 | u8 *src8 = (u8 *) src; | |
821 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
822 | ||
823 | for (i = c & 3; i--; ) | |
824 | fb_writeb(*src8++, dst8++); | |
825 | ||
826 | dst = (u32 __iomem *) dst8; | |
827 | } | |
0a484a3a | 828 | |
1da177e4 LT |
829 | *ppos += c; |
830 | buf += c; | |
831 | cnt += c; | |
832 | count -= c; | |
833 | } | |
0a484a3a | 834 | |
1da177e4 LT |
835 | kfree(buffer); |
836 | ||
6a2a8866 | 837 | return (cnt) ? cnt : err; |
1da177e4 LT |
838 | } |
839 | ||
840 | #ifdef CONFIG_KMOD | |
841 | static void try_to_load(int fb) | |
842 | { | |
843 | request_module("fb%d", fb); | |
844 | } | |
845 | #endif /* CONFIG_KMOD */ | |
846 | ||
847 | int | |
848 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
849 | { | |
1207069f | 850 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
851 | unsigned int yres = info->var.yres; |
852 | int err = 0; | |
1207069f AD |
853 | |
854 | if (var->yoffset > 0) { | |
855 | if (var->vmode & FB_VMODE_YWRAP) { | |
856 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
857 | err = -EINVAL; | |
858 | else | |
859 | yres = 0; | |
860 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
861 | err = -EINVAL; | |
862 | } | |
863 | ||
864 | if (var->xoffset > 0 && (!fix->xpanstep || | |
865 | (var->xoffset % fix->xpanstep))) | |
866 | err = -EINVAL; | |
867 | ||
7572a1ea VS |
868 | if (err || !info->fbops->fb_pan_display || |
869 | var->yoffset + yres > info->var.yres_virtual || | |
1207069f AD |
870 | var->xoffset + info->var.xres > info->var.xres_virtual) |
871 | return -EINVAL; | |
1da177e4 | 872 | |
1da177e4 LT |
873 | if ((err = info->fbops->fb_pan_display(var, info))) |
874 | return err; | |
875 | info->var.xoffset = var->xoffset; | |
876 | info->var.yoffset = var->yoffset; | |
877 | if (var->vmode & FB_VMODE_YWRAP) | |
878 | info->var.vmode |= FB_VMODE_YWRAP; | |
879 | else | |
880 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
881 | return 0; | |
882 | } | |
883 | ||
38a3dc51 AD |
884 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
885 | u32 activate) | |
886 | { | |
887 | struct fb_event event; | |
888 | struct fb_blit_caps caps, fbcaps; | |
889 | int err = 0; | |
890 | ||
891 | memset(&caps, 0, sizeof(caps)); | |
892 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
893 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
894 | event.info = info; | |
895 | event.data = ∩︀ | |
896 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
897 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
898 | ||
899 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
900 | ((fbcaps.y ^ caps.y) & caps.y) || | |
901 | (fbcaps.len < caps.len)) | |
902 | err = -EINVAL; | |
903 | ||
904 | return err; | |
905 | } | |
906 | ||
1da177e4 LT |
907 | int |
908 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
909 | { | |
b1e7223f AD |
910 | int flags = info->flags; |
911 | int ret = 0; | |
1da177e4 LT |
912 | |
913 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
914 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
915 | |
916 | fb_var_to_videomode(&mode1, var); | |
917 | fb_var_to_videomode(&mode2, &info->var); | |
918 | /* make sure we don't delete the videomode of current var */ | |
919 | ret = fb_mode_is_equal(&mode1, &mode2); | |
920 | ||
921 | if (!ret) { | |
922 | struct fb_event event; | |
923 | ||
924 | event.info = info; | |
925 | event.data = &mode1; | |
256154fb | 926 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
927 | } |
928 | ||
929 | if (!ret) | |
930 | fb_delete_videomode(&mode1, &info->modelist); | |
931 | ||
b1e7223f AD |
932 | |
933 | ret = (ret) ? -EINVAL : 0; | |
934 | goto done; | |
1da177e4 LT |
935 | } |
936 | ||
937 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
938 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
939 | u32 activate = var->activate; |
940 | ||
1da177e4 LT |
941 | if (!info->fbops->fb_check_var) { |
942 | *var = info->var; | |
b1e7223f | 943 | goto done; |
1da177e4 LT |
944 | } |
945 | ||
b1e7223f AD |
946 | ret = info->fbops->fb_check_var(var, info); |
947 | ||
948 | if (ret) | |
949 | goto done; | |
1da177e4 LT |
950 | |
951 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
952 | struct fb_videomode mode; | |
1da177e4 | 953 | |
38a3dc51 | 954 | if (info->fbops->fb_get_caps) { |
b1e7223f | 955 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 956 | |
b1e7223f | 957 | if (ret) |
38a3dc51 AD |
958 | goto done; |
959 | } | |
960 | ||
1da177e4 | 961 | info->var = *var; |
38a3dc51 | 962 | |
1da177e4 LT |
963 | if (info->fbops->fb_set_par) |
964 | info->fbops->fb_set_par(info); | |
965 | ||
966 | fb_pan_display(info, &info->var); | |
1da177e4 | 967 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
968 | fb_var_to_videomode(&mode, &info->var); |
969 | ||
970 | if (info->modelist.prev && info->modelist.next && | |
971 | !list_empty(&info->modelist)) | |
b1e7223f | 972 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 973 | |
b1e7223f | 974 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 975 | struct fb_event event; |
4941cb7a | 976 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
977 | FB_EVENT_MODE_CHANGE_ALL : |
978 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
979 | |
980 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
981 | event.info = info; | |
256154fb | 982 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
983 | } |
984 | } | |
985 | } | |
38a3dc51 AD |
986 | |
987 | done: | |
b1e7223f | 988 | return ret; |
1da177e4 LT |
989 | } |
990 | ||
991 | int | |
992 | fb_blank(struct fb_info *info, int blank) | |
993 | { | |
994 | int ret = -EINVAL; | |
995 | ||
996 | if (blank > FB_BLANK_POWERDOWN) | |
997 | blank = FB_BLANK_POWERDOWN; | |
998 | ||
999 | if (info->fbops->fb_blank) | |
1000 | ret = info->fbops->fb_blank(blank, info); | |
1001 | ||
1002 | if (!ret) { | |
1003 | struct fb_event event; | |
1004 | ||
1005 | event.info = info; | |
1006 | event.data = ␣ | |
256154fb | 1007 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | static int | |
1014 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
1015 | unsigned long arg) | |
1016 | { | |
1017 | int fbidx = iminor(inode); | |
1018 | struct fb_info *info = registered_fb[fbidx]; | |
1019 | struct fb_ops *fb = info->fbops; | |
1020 | struct fb_var_screeninfo var; | |
1021 | struct fb_fix_screeninfo fix; | |
1022 | struct fb_con2fbmap con2fb; | |
1023 | struct fb_cmap_user cmap; | |
1024 | struct fb_event event; | |
1025 | void __user *argp = (void __user *)arg; | |
1026 | int i; | |
1027 | ||
1028 | if (!fb) | |
1029 | return -ENODEV; | |
1030 | switch (cmd) { | |
1031 | case FBIOGET_VSCREENINFO: | |
1032 | return copy_to_user(argp, &info->var, | |
1033 | sizeof(var)) ? -EFAULT : 0; | |
1034 | case FBIOPUT_VSCREENINFO: | |
1035 | if (copy_from_user(&var, argp, sizeof(var))) | |
1036 | return -EFAULT; | |
1037 | acquire_console_sem(); | |
1038 | info->flags |= FBINFO_MISC_USEREVENT; | |
1039 | i = fb_set_var(info, &var); | |
1040 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1041 | release_console_sem(); | |
1042 | if (i) return i; | |
1043 | if (copy_to_user(argp, &var, sizeof(var))) | |
1044 | return -EFAULT; | |
1045 | return 0; | |
1046 | case FBIOGET_FSCREENINFO: | |
1047 | return copy_to_user(argp, &info->fix, | |
1048 | sizeof(fix)) ? -EFAULT : 0; | |
1049 | case FBIOPUTCMAP: | |
1050 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1051 | return -EFAULT; | |
1052 | return (fb_set_user_cmap(&cmap, info)); | |
1053 | case FBIOGETCMAP: | |
1054 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1055 | return -EFAULT; | |
1056 | return fb_cmap_to_user(&info->cmap, &cmap); | |
1057 | case FBIOPAN_DISPLAY: | |
1058 | if (copy_from_user(&var, argp, sizeof(var))) | |
1059 | return -EFAULT; | |
1060 | acquire_console_sem(); | |
1061 | i = fb_pan_display(info, &var); | |
1062 | release_console_sem(); | |
1063 | if (i) | |
1064 | return i; | |
1065 | if (copy_to_user(argp, &var, sizeof(var))) | |
1066 | return -EFAULT; | |
1067 | return 0; | |
1068 | case FBIO_CURSOR: | |
1069 | return -EINVAL; | |
1070 | case FBIOGET_CON2FBMAP: | |
1071 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1072 | return -EFAULT; | |
1073 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1074 | return -EINVAL; | |
1075 | con2fb.framebuffer = -1; | |
1076 | event.info = info; | |
1077 | event.data = &con2fb; | |
256154fb | 1078 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1da177e4 LT |
1079 | return copy_to_user(argp, &con2fb, |
1080 | sizeof(con2fb)) ? -EFAULT : 0; | |
1081 | case FBIOPUT_CON2FBMAP: | |
1082 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1083 | return - EFAULT; | |
57a7a6db | 1084 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1da177e4 LT |
1085 | return -EINVAL; |
1086 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
1087 | return -EINVAL; | |
1088 | #ifdef CONFIG_KMOD | |
1089 | if (!registered_fb[con2fb.framebuffer]) | |
1090 | try_to_load(con2fb.framebuffer); | |
1091 | #endif /* CONFIG_KMOD */ | |
1092 | if (!registered_fb[con2fb.framebuffer]) | |
1093 | return -EINVAL; | |
1094 | event.info = info; | |
1095 | event.data = &con2fb; | |
256154fb AD |
1096 | return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
1097 | &event); | |
1da177e4 LT |
1098 | case FBIOBLANK: |
1099 | acquire_console_sem(); | |
1100 | info->flags |= FBINFO_MISC_USEREVENT; | |
1101 | i = fb_blank(info, arg); | |
1102 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1103 | release_console_sem(); | |
1104 | return i; | |
1105 | default: | |
1106 | if (fb->fb_ioctl == NULL) | |
1107 | return -EINVAL; | |
67a6680d | 1108 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1109 | } |
1110 | } | |
1111 | ||
1112 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1113 | struct fb_fix_screeninfo32 { |
1114 | char id[16]; | |
1115 | compat_caddr_t smem_start; | |
1116 | u32 smem_len; | |
1117 | u32 type; | |
1118 | u32 type_aux; | |
1119 | u32 visual; | |
1120 | u16 xpanstep; | |
1121 | u16 ypanstep; | |
1122 | u16 ywrapstep; | |
1123 | u32 line_length; | |
1124 | compat_caddr_t mmio_start; | |
1125 | u32 mmio_len; | |
1126 | u32 accel; | |
1127 | u16 reserved[3]; | |
1128 | }; | |
1129 | ||
1130 | struct fb_cmap32 { | |
1131 | u32 start; | |
1132 | u32 len; | |
1133 | compat_caddr_t red; | |
1134 | compat_caddr_t green; | |
1135 | compat_caddr_t blue; | |
1136 | compat_caddr_t transp; | |
1137 | }; | |
1138 | ||
1139 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
1140 | unsigned int cmd, unsigned long arg) | |
1141 | { | |
1142 | struct fb_cmap_user __user *cmap; | |
1143 | struct fb_cmap32 __user *cmap32; | |
1144 | __u32 data; | |
1145 | int err; | |
1146 | ||
1147 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1148 | cmap32 = compat_ptr(arg); | |
1149 | ||
1150 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1151 | return -EFAULT; | |
1152 | ||
1153 | if (get_user(data, &cmap32->red) || | |
1154 | put_user(compat_ptr(data), &cmap->red) || | |
1155 | get_user(data, &cmap32->green) || | |
1156 | put_user(compat_ptr(data), &cmap->green) || | |
1157 | get_user(data, &cmap32->blue) || | |
1158 | put_user(compat_ptr(data), &cmap->blue) || | |
1159 | get_user(data, &cmap32->transp) || | |
1160 | put_user(compat_ptr(data), &cmap->transp)) | |
1161 | return -EFAULT; | |
1162 | ||
1163 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1164 | ||
1165 | if (!err) { | |
1166 | if (copy_in_user(&cmap32->start, | |
1167 | &cmap->start, | |
1168 | 2 * sizeof(__u32))) | |
1169 | err = -EFAULT; | |
1170 | } | |
1171 | return err; | |
1172 | } | |
1173 | ||
1174 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1175 | struct fb_fix_screeninfo32 __user *fix32) | |
1176 | { | |
1177 | __u32 data; | |
1178 | int err; | |
1179 | ||
1180 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1181 | ||
1182 | data = (__u32) (unsigned long) fix->smem_start; | |
1183 | err |= put_user(data, &fix32->smem_start); | |
1184 | ||
1185 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1186 | err |= put_user(fix->type, &fix32->type); | |
1187 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1188 | err |= put_user(fix->visual, &fix32->visual); | |
1189 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1190 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1191 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1192 | err |= put_user(fix->line_length, &fix32->line_length); | |
1193 | ||
1194 | data = (__u32) (unsigned long) fix->mmio_start; | |
1195 | err |= put_user(data, &fix32->mmio_start); | |
1196 | ||
1197 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1198 | err |= put_user(fix->accel, &fix32->accel); | |
1199 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1200 | sizeof(fix->reserved)); | |
1201 | ||
1202 | return err; | |
1203 | } | |
1204 | ||
1205 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1206 | unsigned int cmd, unsigned long arg) | |
1207 | { | |
1208 | mm_segment_t old_fs; | |
1209 | struct fb_fix_screeninfo fix; | |
1210 | struct fb_fix_screeninfo32 __user *fix32; | |
1211 | int err; | |
1212 | ||
1213 | fix32 = compat_ptr(arg); | |
1214 | ||
1215 | old_fs = get_fs(); | |
1216 | set_fs(KERNEL_DS); | |
1217 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1218 | set_fs(old_fs); | |
1219 | ||
1220 | if (!err) | |
1221 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1222 | ||
1223 | return err; | |
1224 | } | |
1225 | ||
1da177e4 LT |
1226 | static long |
1227 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1228 | { | |
ad9a824e | 1229 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1230 | int fbidx = iminor(inode); |
1da177e4 LT |
1231 | struct fb_info *info = registered_fb[fbidx]; |
1232 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1233 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1234 | |
1da177e4 | 1235 | lock_kernel(); |
c7f82d9c AB |
1236 | switch(cmd) { |
1237 | case FBIOGET_VSCREENINFO: | |
1238 | case FBIOPUT_VSCREENINFO: | |
1239 | case FBIOPAN_DISPLAY: | |
1240 | case FBIOGET_CON2FBMAP: | |
1241 | case FBIOPUT_CON2FBMAP: | |
1242 | arg = (unsigned long) compat_ptr(arg); | |
1243 | case FBIOBLANK: | |
1244 | ret = fb_ioctl(inode, file, cmd, arg); | |
1245 | break; | |
1246 | ||
1247 | case FBIOGET_FSCREENINFO: | |
1248 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1249 | break; | |
1250 | ||
1251 | case FBIOGETCMAP: | |
1252 | case FBIOPUTCMAP: | |
1253 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1254 | break; | |
1255 | ||
1256 | default: | |
1257 | if (fb->fb_compat_ioctl) | |
67a6680d | 1258 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1259 | break; |
1260 | } | |
1da177e4 LT |
1261 | unlock_kernel(); |
1262 | return ret; | |
1263 | } | |
1264 | #endif | |
1265 | ||
10eb2659 | 1266 | static int |
1da177e4 LT |
1267 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1268 | { | |
ad9a824e | 1269 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1270 | struct fb_info *info = registered_fb[fbidx]; |
1271 | struct fb_ops *fb = info->fbops; | |
1272 | unsigned long off; | |
1da177e4 LT |
1273 | unsigned long start; |
1274 | u32 len; | |
1da177e4 LT |
1275 | |
1276 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1277 | return -EINVAL; | |
1278 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1279 | if (!fb) | |
1280 | return -ENODEV; | |
1281 | if (fb->fb_mmap) { | |
1282 | int res; | |
1283 | lock_kernel(); | |
216d526c | 1284 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1285 | unlock_kernel(); |
1286 | return res; | |
1287 | } | |
1288 | ||
1da177e4 LT |
1289 | lock_kernel(); |
1290 | ||
1291 | /* frame buffer memory */ | |
1292 | start = info->fix.smem_start; | |
1293 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1294 | if (off >= len) { | |
1295 | /* memory mapped io */ | |
1296 | off -= len; | |
1297 | if (info->var.accel_flags) { | |
1298 | unlock_kernel(); | |
1299 | return -EINVAL; | |
1300 | } | |
1301 | start = info->fix.mmio_start; | |
1302 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1303 | } | |
1304 | unlock_kernel(); | |
1305 | start &= PAGE_MASK; | |
1306 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1307 | return -EINVAL; | |
1308 | off += start; | |
1309 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1310 | /* This is an IO map - tell maydump to skip this VMA */ | |
1311 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1312 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1313 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1314 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1315 | return -EAGAIN; | |
1da177e4 | 1316 | return 0; |
1da177e4 LT |
1317 | } |
1318 | ||
1319 | static int | |
1320 | fb_open(struct inode *inode, struct file *file) | |
1321 | { | |
1322 | int fbidx = iminor(inode); | |
1323 | struct fb_info *info; | |
1324 | int res = 0; | |
1325 | ||
1326 | if (fbidx >= FB_MAX) | |
1327 | return -ENODEV; | |
fc7f687a | 1328 | lock_kernel(); |
1da177e4 LT |
1329 | #ifdef CONFIG_KMOD |
1330 | if (!(info = registered_fb[fbidx])) | |
1331 | try_to_load(fbidx); | |
1332 | #endif /* CONFIG_KMOD */ | |
fc7f687a JC |
1333 | if (!(info = registered_fb[fbidx])) { |
1334 | res = -ENODEV; | |
1335 | goto out; | |
1336 | } | |
1337 | if (!try_module_get(info->fbops->owner)) { | |
1338 | res = -ENODEV; | |
1339 | goto out; | |
1340 | } | |
cae8a12f | 1341 | file->private_data = info; |
1da177e4 LT |
1342 | if (info->fbops->fb_open) { |
1343 | res = info->fbops->fb_open(info,1); | |
1344 | if (res) | |
1345 | module_put(info->fbops->owner); | |
1346 | } | |
fc7f687a JC |
1347 | out: |
1348 | unlock_kernel(); | |
1da177e4 LT |
1349 | return res; |
1350 | } | |
1351 | ||
1352 | static int | |
1353 | fb_release(struct inode *inode, struct file *file) | |
1354 | { | |
cae8a12f | 1355 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1356 | |
1357 | lock_kernel(); | |
1da177e4 LT |
1358 | if (info->fbops->fb_release) |
1359 | info->fbops->fb_release(info,1); | |
1360 | module_put(info->fbops->owner); | |
1361 | unlock_kernel(); | |
1362 | return 0; | |
1363 | } | |
1364 | ||
0128beee | 1365 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1366 | .owner = THIS_MODULE, |
1367 | .read = fb_read, | |
1368 | .write = fb_write, | |
1369 | .ioctl = fb_ioctl, | |
1370 | #ifdef CONFIG_COMPAT | |
1371 | .compat_ioctl = fb_compat_ioctl, | |
1372 | #endif | |
1373 | .mmap = fb_mmap, | |
1374 | .open = fb_open, | |
1375 | .release = fb_release, | |
1376 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1377 | .get_unmapped_area = get_fb_unmapped_area, | |
1378 | #endif | |
5e841b88 PM |
1379 | #ifdef CONFIG_FB_DEFERRED_IO |
1380 | .fsync = fb_deferred_io_fsync, | |
1381 | #endif | |
1da177e4 LT |
1382 | }; |
1383 | ||
9a179176 AD |
1384 | struct class *fb_class; |
1385 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1386 | |
1387 | static int fb_check_foreignness(struct fb_info *fi) | |
1388 | { | |
1389 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1390 | ||
1391 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1392 | ||
1393 | #ifdef __BIG_ENDIAN | |
1394 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1395 | #else | |
1396 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1397 | #endif /* __BIG_ENDIAN */ | |
1398 | ||
1399 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1400 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1401 | "support this framebuffer\n", fi->fix.id); | |
1402 | return -ENOSYS; | |
1403 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1404 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1405 | "support this framebuffer\n", fi->fix.id); | |
1406 | return -ENOSYS; | |
1407 | } | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1da177e4 LT |
1412 | /** |
1413 | * register_framebuffer - registers a frame buffer device | |
1414 | * @fb_info: frame buffer info structure | |
1415 | * | |
1416 | * Registers a frame buffer device @fb_info. | |
1417 | * | |
1418 | * Returns negative errno on error, or zero for success. | |
1419 | * | |
1420 | */ | |
1421 | ||
1422 | int | |
1423 | register_framebuffer(struct fb_info *fb_info) | |
1424 | { | |
1425 | int i; | |
1426 | struct fb_event event; | |
96fe6a21 | 1427 | struct fb_videomode mode; |
1da177e4 LT |
1428 | |
1429 | if (num_registered_fb == FB_MAX) | |
1430 | return -ENXIO; | |
e4c690e0 AV |
1431 | |
1432 | if (fb_check_foreignness(fb_info)) | |
1433 | return -ENOSYS; | |
1434 | ||
1da177e4 LT |
1435 | num_registered_fb++; |
1436 | for (i = 0 ; i < FB_MAX; i++) | |
1437 | if (!registered_fb[i]) | |
1438 | break; | |
1439 | fb_info->node = i; | |
1440 | ||
1e274401 GKH |
1441 | fb_info->dev = device_create_drvdata(fb_class, fb_info->device, |
1442 | MKDEV(FB_MAJOR, i), NULL, | |
1443 | "fb%d", i); | |
78cde088 | 1444 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1445 | /* Not fatal */ |
78cde088 GKH |
1446 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1447 | fb_info->dev = NULL; | |
1da177e4 | 1448 | } else |
78cde088 | 1449 | fb_init_device(fb_info); |
1da177e4 LT |
1450 | |
1451 | if (fb_info->pixmap.addr == NULL) { | |
1452 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1453 | if (fb_info->pixmap.addr) { | |
1454 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1455 | fb_info->pixmap.buf_align = 1; | |
1456 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1457 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1458 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1459 | } | |
1460 | } | |
1461 | fb_info->pixmap.offset = 0; | |
1462 | ||
bf26ad72 AD |
1463 | if (!fb_info->pixmap.blit_x) |
1464 | fb_info->pixmap.blit_x = ~(u32)0; | |
1465 | ||
1466 | if (!fb_info->pixmap.blit_y) | |
1467 | fb_info->pixmap.blit_y = ~(u32)0; | |
1468 | ||
96fe6a21 | 1469 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1470 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1471 | |
96fe6a21 AD |
1472 | fb_var_to_videomode(&mode, &fb_info->var); |
1473 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1474 | registered_fb[i] = fb_info; |
1475 | ||
1da177e4 | 1476 | event.info = fb_info; |
256154fb | 1477 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1478 | return 0; |
1479 | } | |
1480 | ||
1481 | ||
1482 | /** | |
1483 | * unregister_framebuffer - releases a frame buffer device | |
1484 | * @fb_info: frame buffer info structure | |
1485 | * | |
1486 | * Unregisters a frame buffer device @fb_info. | |
1487 | * | |
1488 | * Returns negative errno on error, or zero for success. | |
1489 | * | |
cfafca80 JB |
1490 | * This function will also notify the framebuffer console |
1491 | * to release the driver. | |
1492 | * | |
1493 | * This is meant to be called within a driver's module_exit() | |
1494 | * function. If this is called outside module_exit(), ensure | |
1495 | * that the driver implements fb_open() and fb_release() to | |
1496 | * check that no processes are using the device. | |
1da177e4 LT |
1497 | */ |
1498 | ||
1499 | int | |
1500 | unregister_framebuffer(struct fb_info *fb_info) | |
1501 | { | |
e614b18d | 1502 | struct fb_event event; |
cfafca80 | 1503 | int i, ret = 0; |
1da177e4 LT |
1504 | |
1505 | i = fb_info->node; | |
cfafca80 JB |
1506 | if (!registered_fb[i]) { |
1507 | ret = -EINVAL; | |
1508 | goto done; | |
1509 | } | |
1510 | ||
1511 | event.info = fb_info; | |
1512 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
1513 | ||
1514 | if (ret) { | |
1515 | ret = -EINVAL; | |
1516 | goto done; | |
1517 | } | |
1da177e4 | 1518 | |
e614b18d AD |
1519 | if (fb_info->pixmap.addr && |
1520 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1521 | kfree(fb_info->pixmap.addr); |
1522 | fb_destroy_modelist(&fb_info->modelist); | |
1523 | registered_fb[i]=NULL; | |
1524 | num_registered_fb--; | |
78cde088 GKH |
1525 | fb_cleanup_device(fb_info); |
1526 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1527 | event.info = fb_info; |
256154fb | 1528 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
cfafca80 JB |
1529 | done: |
1530 | return ret; | |
1da177e4 LT |
1531 | } |
1532 | ||
1da177e4 LT |
1533 | /** |
1534 | * fb_set_suspend - low level driver signals suspend | |
1535 | * @info: framebuffer affected | |
1536 | * @state: 0 = resuming, !=0 = suspending | |
1537 | * | |
1538 | * This is meant to be used by low level drivers to | |
1539 | * signal suspend/resume to the core & clients. | |
1540 | * It must be called with the console semaphore held | |
1541 | */ | |
1542 | void fb_set_suspend(struct fb_info *info, int state) | |
1543 | { | |
1544 | struct fb_event event; | |
1545 | ||
1546 | event.info = info; | |
1547 | if (state) { | |
256154fb | 1548 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1549 | info->state = FBINFO_STATE_SUSPENDED; |
1550 | } else { | |
1551 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1552 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1553 | } |
1554 | } | |
1555 | ||
1556 | /** | |
1557 | * fbmem_init - init frame buffer subsystem | |
1558 | * | |
1559 | * Initialize the frame buffer subsystem. | |
1560 | * | |
1561 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1562 | * | |
1563 | */ | |
1564 | ||
1565 | static int __init | |
1566 | fbmem_init(void) | |
1567 | { | |
0aa16341 | 1568 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1569 | |
1da177e4 LT |
1570 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1571 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1572 | ||
56b22935 | 1573 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1574 | if (IS_ERR(fb_class)) { |
1575 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1576 | fb_class = NULL; | |
1577 | } | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | #ifdef MODULE | |
1582 | module_init(fbmem_init); | |
1583 | static void __exit | |
1584 | fbmem_exit(void) | |
1585 | { | |
c43f89c2 | 1586 | remove_proc_entry("fb", NULL); |
56b22935 | 1587 | class_destroy(fb_class); |
5a340cce | 1588 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1589 | } |
1590 | ||
1591 | module_exit(fbmem_exit); | |
1592 | MODULE_LICENSE("GPL"); | |
1593 | MODULE_DESCRIPTION("Framebuffer base"); | |
1594 | #else | |
1595 | subsys_initcall(fbmem_init); | |
1596 | #endif | |
1597 | ||
1598 | int fb_new_modelist(struct fb_info *info) | |
1599 | { | |
1600 | struct fb_event event; | |
1601 | struct fb_var_screeninfo var = info->var; | |
1602 | struct list_head *pos, *n; | |
1603 | struct fb_modelist *modelist; | |
1604 | struct fb_videomode *m, mode; | |
1605 | int err = 1; | |
1606 | ||
1607 | list_for_each_safe(pos, n, &info->modelist) { | |
1608 | modelist = list_entry(pos, struct fb_modelist, list); | |
1609 | m = &modelist->mode; | |
1610 | fb_videomode_to_var(&var, m); | |
1611 | var.activate = FB_ACTIVATE_TEST; | |
1612 | err = fb_set_var(info, &var); | |
1613 | fb_var_to_videomode(&mode, &var); | |
1614 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1615 | list_del(pos); | |
1616 | kfree(pos); | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | err = 1; | |
1621 | ||
1622 | if (!list_empty(&info->modelist)) { | |
1623 | event.info = info; | |
256154fb | 1624 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1625 | } |
1626 | ||
1627 | return err; | |
1628 | } | |
1629 | ||
0128beee HD |
1630 | static char *video_options[FB_MAX] __read_mostly; |
1631 | static int ofonly __read_mostly; | |
1da177e4 LT |
1632 | |
1633 | /** | |
1634 | * fb_get_options - get kernel boot parameters | |
1635 | * @name: framebuffer name as it would appear in | |
1636 | * the boot parameter line | |
1637 | * (video=<name>:<options>) | |
1638 | * @option: the option will be stored here | |
1639 | * | |
1640 | * NOTE: Needed to maintain backwards compatibility | |
1641 | */ | |
1642 | int fb_get_options(char *name, char **option) | |
1643 | { | |
1644 | char *opt, *options = NULL; | |
1645 | int opt_len, retval = 0; | |
1646 | int name_len = strlen(name), i; | |
1647 | ||
1648 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1649 | retval = 1; | |
1650 | ||
1651 | if (name_len && !retval) { | |
1652 | for (i = 0; i < FB_MAX; i++) { | |
1653 | if (video_options[i] == NULL) | |
1654 | continue; | |
1655 | opt_len = strlen(video_options[i]); | |
1656 | if (!opt_len) | |
1657 | continue; | |
1658 | opt = video_options[i]; | |
1659 | if (!strncmp(name, opt, name_len) && | |
1660 | opt[name_len] == ':') | |
1661 | options = opt + name_len + 1; | |
1662 | } | |
1663 | } | |
1664 | if (options && !strncmp(options, "off", 3)) | |
1665 | retval = 1; | |
1666 | ||
1667 | if (option) | |
1668 | *option = options; | |
1669 | ||
1670 | return retval; | |
1671 | } | |
1672 | ||
bc6d7fdf | 1673 | #ifndef MODULE |
1da177e4 LT |
1674 | /** |
1675 | * video_setup - process command line options | |
1676 | * @options: string of options | |
1677 | * | |
1678 | * Process command line options for frame buffer subsystem. | |
1679 | * | |
1680 | * NOTE: This function is a __setup and __init function. | |
1681 | * It only stores the options. Drivers have to call | |
1682 | * fb_get_options() as necessary. | |
1683 | * | |
1684 | * Returns zero. | |
1685 | * | |
1686 | */ | |
75c96f85 | 1687 | static int __init video_setup(char *options) |
1da177e4 LT |
1688 | { |
1689 | int i, global = 0; | |
1690 | ||
1691 | if (!options || !*options) | |
1692 | global = 1; | |
1693 | ||
1694 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1695 | ofonly = 1; | |
1696 | global = 1; | |
1697 | } | |
1698 | ||
1699 | if (!global && !strstr(options, "fb:")) { | |
9a054fba | 1700 | fb_mode_option = options; |
1da177e4 LT |
1701 | global = 1; |
1702 | } | |
1703 | ||
1704 | if (!global) { | |
1705 | for (i = 0; i < FB_MAX; i++) { | |
1706 | if (video_options[i] == NULL) { | |
1707 | video_options[i] = options; | |
1708 | break; | |
1709 | } | |
1710 | ||
1711 | } | |
1712 | } | |
1713 | ||
9b41046c | 1714 | return 1; |
1da177e4 LT |
1715 | } |
1716 | __setup("video=", video_setup); | |
bc6d7fdf | 1717 | #endif |
1da177e4 LT |
1718 | |
1719 | /* | |
1720 | * Visible symbols for modules | |
1721 | */ | |
1722 | ||
1723 | EXPORT_SYMBOL(register_framebuffer); | |
1724 | EXPORT_SYMBOL(unregister_framebuffer); | |
1725 | EXPORT_SYMBOL(num_registered_fb); | |
1726 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1727 | EXPORT_SYMBOL(fb_show_logo); |
1728 | EXPORT_SYMBOL(fb_set_var); | |
1729 | EXPORT_SYMBOL(fb_blank); | |
1730 | EXPORT_SYMBOL(fb_pan_display); | |
1731 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1732 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1733 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1734 | |
1735 | MODULE_LICENSE("GPL"); |