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> |
5bb49fcd | 38 | #include <linux/major.h> |
1da177e4 | 39 | |
10eb2659 | 40 | #include <asm/fb.h> |
1da177e4 | 41 | |
1da177e4 LT |
42 | |
43 | /* | |
44 | * Frame buffer device initialization and setup routines | |
45 | */ | |
46 | ||
47 | #define FBPIXMAPSIZE (1024 * 8) | |
48 | ||
0128beee HD |
49 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
50 | int num_registered_fb __read_mostly; | |
1da177e4 LT |
51 | |
52 | /* | |
53 | * Helpers | |
54 | */ | |
55 | ||
b8c90945 AD |
56 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
57 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 58 | { |
b8c90945 AD |
59 | int depth = 0; |
60 | ||
61 | if (fix->visual == FB_VISUAL_MONO01 || | |
62 | fix->visual == FB_VISUAL_MONO10) | |
63 | depth = 1; | |
64 | else { | |
65 | if (var->green.length == var->blue.length && | |
66 | var->green.length == var->red.length && | |
67 | var->green.offset == var->blue.offset && | |
68 | var->green.offset == var->red.offset) | |
69 | depth = var->green.length; | |
70 | else | |
71 | depth = var->green.length + var->red.length + | |
72 | var->blue.length; | |
73 | } | |
74 | ||
75 | return depth; | |
1da177e4 LT |
76 | } |
77 | EXPORT_SYMBOL(fb_get_color_depth); | |
78 | ||
79 | /* | |
f5a9951c | 80 | * Data padding functions. |
1da177e4 | 81 | */ |
f1ab5dac | 82 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 83 | { |
829e79b6 | 84 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 85 | } |
f1ab5dac | 86 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 87 | |
f1ab5dac JS |
88 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
89 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
90 | { |
91 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
92 | int i, j; | |
93 | ||
94 | for (i = height; i--; ) { | |
95 | for (j = 0; j < idx; j++) { | |
96 | tmp = dst[j]; | |
97 | tmp &= mask; | |
98 | tmp |= *src >> shift_low; | |
99 | dst[j] = tmp; | |
100 | tmp = *src << shift_high; | |
101 | dst[j+1] = tmp; | |
102 | src++; | |
103 | } | |
104 | tmp = dst[idx]; | |
105 | tmp &= mask; | |
106 | tmp |= *src >> shift_low; | |
107 | dst[idx] = tmp; | |
108 | if (shift_high < mod) { | |
109 | tmp = *src << shift_high; | |
110 | dst[idx+1] = tmp; | |
111 | } | |
112 | src++; | |
113 | dst += d_pitch; | |
114 | } | |
115 | } | |
f1ab5dac | 116 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
117 | |
118 | /* | |
119 | * we need to lock this section since fb_cursor | |
120 | * may use fb_imageblit() | |
121 | */ | |
122 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
123 | { | |
124 | u32 align = buf->buf_align - 1, offset; | |
125 | char *addr = buf->addr; | |
126 | ||
127 | /* If IO mapped, we need to sync before access, no sharing of | |
128 | * the pixmap is done | |
129 | */ | |
130 | if (buf->flags & FB_PIXMAP_IO) { | |
131 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
132 | info->fbops->fb_sync(info); | |
133 | return addr; | |
134 | } | |
135 | ||
136 | /* See if we fit in the remaining pixmap space */ | |
137 | offset = buf->offset + align; | |
138 | offset &= ~align; | |
139 | if (offset + size > buf->size) { | |
140 | /* We do not fit. In order to be able to re-use the buffer, | |
141 | * we must ensure no asynchronous DMA'ing or whatever operation | |
142 | * is in progress, we sync for that. | |
143 | */ | |
144 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
145 | info->fbops->fb_sync(info); | |
146 | offset = 0; | |
147 | } | |
148 | buf->offset = offset + size; | |
149 | addr += offset; | |
150 | ||
151 | return addr; | |
152 | } | |
153 | ||
154 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
155 | |
156 | static inline unsigned safe_shift(unsigned d, int n) | |
157 | { | |
158 | return n < 0 ? d >> -n : d << n; | |
159 | } | |
160 | ||
161 | static void fb_set_logocmap(struct fb_info *info, | |
162 | const struct linux_logo *logo) | |
163 | { | |
164 | struct fb_cmap palette_cmap; | |
165 | u16 palette_green[16]; | |
166 | u16 palette_blue[16]; | |
167 | u16 palette_red[16]; | |
168 | int i, j, n; | |
169 | const unsigned char *clut = logo->clut; | |
170 | ||
171 | palette_cmap.start = 0; | |
172 | palette_cmap.len = 16; | |
173 | palette_cmap.red = palette_red; | |
174 | palette_cmap.green = palette_green; | |
175 | palette_cmap.blue = palette_blue; | |
176 | palette_cmap.transp = NULL; | |
177 | ||
178 | for (i = 0; i < logo->clutsize; i += n) { | |
179 | n = logo->clutsize - i; | |
180 | /* palette_cmap provides space for only 16 colors at once */ | |
181 | if (n > 16) | |
182 | n = 16; | |
183 | palette_cmap.start = 32 + i; | |
184 | palette_cmap.len = n; | |
185 | for (j = 0; j < n; ++j) { | |
186 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
187 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
188 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
189 | clut += 3; | |
190 | } | |
191 | fb_set_cmap(&palette_cmap, info); | |
192 | } | |
193 | } | |
194 | ||
195 | static void fb_set_logo_truepalette(struct fb_info *info, | |
196 | const struct linux_logo *logo, | |
197 | u32 *palette) | |
198 | { | |
0128beee | 199 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
200 | unsigned char redmask, greenmask, bluemask; |
201 | int redshift, greenshift, blueshift; | |
202 | int i; | |
203 | const unsigned char *clut = logo->clut; | |
204 | ||
205 | /* | |
206 | * We have to create a temporary palette since console palette is only | |
207 | * 16 colors long. | |
208 | */ | |
209 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
210 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
211 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
212 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
213 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
214 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
215 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
216 | ||
217 | for ( i = 0; i < logo->clutsize; i++) { | |
218 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
219 | safe_shift((clut[1] & greenmask), greenshift) | | |
220 | safe_shift((clut[2] & bluemask), blueshift)); | |
221 | clut += 3; | |
222 | } | |
223 | } | |
224 | ||
225 | static void fb_set_logo_directpalette(struct fb_info *info, | |
226 | const struct linux_logo *logo, | |
227 | u32 *palette) | |
228 | { | |
229 | int redshift, greenshift, blueshift; | |
230 | int i; | |
231 | ||
232 | redshift = info->var.red.offset; | |
233 | greenshift = info->var.green.offset; | |
234 | blueshift = info->var.blue.offset; | |
235 | ||
236 | for (i = 32; i < logo->clutsize; i++) | |
237 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
238 | } | |
239 | ||
240 | static void fb_set_logo(struct fb_info *info, | |
241 | const struct linux_logo *logo, u8 *dst, | |
242 | int depth) | |
243 | { | |
b8c90945 | 244 | int i, j, k; |
1da177e4 | 245 | const u8 *src = logo->data; |
b8c90945 AD |
246 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
247 | u8 fg = 1, d; | |
1da177e4 | 248 | |
1692b37c AD |
249 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
250 | case 1: | |
251 | fg = 1; | |
252 | break; | |
253 | case 2: | |
254 | fg = 3; | |
255 | break; | |
256 | default: | |
1da177e4 | 257 | fg = 7; |
1692b37c AD |
258 | break; |
259 | } | |
1da177e4 | 260 | |
b8c90945 AD |
261 | if (info->fix.visual == FB_VISUAL_MONO01 || |
262 | info->fix.visual == FB_VISUAL_MONO10) | |
263 | fg = ~((u8) (0xfff << info->var.green.length)); | |
264 | ||
1da177e4 LT |
265 | switch (depth) { |
266 | case 4: | |
267 | for (i = 0; i < logo->height; i++) | |
268 | for (j = 0; j < logo->width; src++) { | |
269 | *dst++ = *src >> 4; | |
270 | j++; | |
271 | if (j < logo->width) { | |
272 | *dst++ = *src & 0x0f; | |
273 | j++; | |
274 | } | |
275 | } | |
276 | break; | |
277 | case 1: | |
278 | for (i = 0; i < logo->height; i++) { | |
279 | for (j = 0; j < logo->width; src++) { | |
280 | d = *src ^ xor; | |
281 | for (k = 7; k >= 0; k--) { | |
282 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
283 | j++; | |
284 | } | |
285 | } | |
286 | } | |
287 | break; | |
288 | } | |
289 | } | |
290 | ||
291 | /* | |
292 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
293 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
294 | * the visual format and color depth of the framebuffer, the DAC, the | |
295 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
296 | * | |
297 | * Case 1 - linux_logo_clut224: | |
298 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
299 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
300 | * | |
301 | * For visuals that require color info from the pseudo_palette, we also construct | |
302 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
303 | * will be set. | |
304 | * | |
305 | * Case 2 - linux_logo_vga16: | |
306 | * The number of colors just matches the console colors, thus there is no need | |
307 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
308 | * each byte contains color information for two pixels (upper and lower nibble). | |
309 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
310 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
311 | * | |
312 | * Case 3 - linux_logo_mono: | |
313 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
314 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
315 | * be set to 1. | |
316 | */ | |
317 | static struct logo_data { | |
318 | int depth; | |
319 | int needs_directpalette; | |
320 | int needs_truepalette; | |
321 | int needs_cmapreset; | |
322 | const struct linux_logo *logo; | |
0128beee | 323 | } fb_logo __read_mostly; |
1da177e4 | 324 | |
9c44e5f6 AD |
325 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
326 | { | |
327 | u32 size = width * height, i; | |
328 | ||
329 | out += size - 1; | |
330 | ||
331 | for (i = size; i--; ) | |
332 | *out-- = *in++; | |
333 | } | |
334 | ||
335 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
336 | { | |
f837e6f7 | 337 | int i, j, h = height - 1; |
9c44e5f6 AD |
338 | |
339 | for (i = 0; i < height; i++) | |
340 | for (j = 0; j < width; j++) | |
f837e6f7 | 341 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
342 | } |
343 | ||
344 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
345 | { | |
346 | int i, j, w = width - 1; | |
347 | ||
348 | for (i = 0; i < height; i++) | |
349 | for (j = 0; j < width; j++) | |
350 | out[height * (w - j) + i] = *in++; | |
351 | } | |
352 | ||
353 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
354 | struct fb_image *image, int rotate) | |
355 | { | |
356 | u32 tmp; | |
357 | ||
358 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
359 | fb_rotate_logo_ud(image->data, dst, image->width, |
360 | image->height); | |
abed5d15 GU |
361 | image->dx = info->var.xres - image->width - image->dx; |
362 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 363 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
364 | fb_rotate_logo_cw(image->data, dst, image->width, |
365 | image->height); | |
9c44e5f6 AD |
366 | tmp = image->width; |
367 | image->width = image->height; | |
368 | image->height = tmp; | |
abed5d15 GU |
369 | tmp = image->dy; |
370 | image->dy = image->dx; | |
371 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 372 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
373 | fb_rotate_logo_ccw(image->data, dst, image->width, |
374 | image->height); | |
f837e6f7 AD |
375 | tmp = image->width; |
376 | image->width = image->height; | |
377 | image->height = tmp; | |
abed5d15 GU |
378 | tmp = image->dx; |
379 | image->dx = image->dy; | |
380 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
381 | } |
382 | ||
383 | image->data = dst; | |
384 | } | |
385 | ||
386 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 387 | int rotate, unsigned int num) |
9c44e5f6 | 388 | { |
448d4797 | 389 | unsigned int x; |
9c44e5f6 AD |
390 | |
391 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
392 | for (x = 0; |
393 | x < num && image->dx + image->width <= info->var.xres; | |
394 | x++) { | |
9c44e5f6 | 395 | info->fbops->fb_imageblit(info, image); |
448d4797 | 396 | image->dx += image->width + 8; |
9c44e5f6 AD |
397 | } |
398 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 399 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 400 | info->fbops->fb_imageblit(info, image); |
448d4797 | 401 | image->dx -= image->width + 8; |
9c44e5f6 AD |
402 | } |
403 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
404 | for (x = 0; |
405 | x < num && image->dy + image->height <= info->var.yres; | |
406 | x++) { | |
9c44e5f6 | 407 | info->fbops->fb_imageblit(info, image); |
448d4797 | 408 | image->dy += image->height + 8; |
9c44e5f6 AD |
409 | } |
410 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 411 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 412 | info->fbops->fb_imageblit(info, image); |
448d4797 | 413 | image->dy -= image->height + 8; |
9c44e5f6 AD |
414 | } |
415 | } | |
416 | } | |
417 | ||
90da63e5 GU |
418 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
419 | const struct linux_logo *logo, int y, | |
420 | unsigned int n) | |
1da177e4 LT |
421 | { |
422 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 423 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 424 | struct fb_image image; |
1da177e4 LT |
425 | |
426 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 427 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 428 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
429 | return 0; |
430 | ||
431 | image.depth = 8; | |
90da63e5 | 432 | image.data = logo->data; |
1da177e4 LT |
433 | |
434 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 435 | fb_set_logocmap(info, logo); |
1da177e4 | 436 | |
9900abfb | 437 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
438 | fb_logo.needs_directpalette) { |
439 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
440 | if (palette == NULL) | |
441 | return 0; | |
442 | ||
443 | if (fb_logo.needs_truepalette) | |
90da63e5 | 444 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 445 | else |
90da63e5 | 446 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
447 | |
448 | saved_pseudo_palette = info->pseudo_palette; | |
449 | info->pseudo_palette = palette; | |
450 | } | |
451 | ||
452 | if (fb_logo.depth <= 4) { | |
90da63e5 | 453 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
454 | if (logo_new == NULL) { |
455 | kfree(palette); | |
456 | if (saved_pseudo_palette) | |
457 | info->pseudo_palette = saved_pseudo_palette; | |
458 | return 0; | |
459 | } | |
460 | image.data = logo_new; | |
90da63e5 | 461 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
462 | } |
463 | ||
9c44e5f6 | 464 | image.dx = 0; |
90da63e5 GU |
465 | image.dy = y; |
466 | image.width = logo->width; | |
467 | image.height = logo->height; | |
1da177e4 | 468 | |
9c44e5f6 | 469 | if (rotate) { |
90da63e5 GU |
470 | logo_rotate = kmalloc(logo->width * |
471 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
472 | if (logo_rotate) |
473 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 474 | } |
9c44e5f6 | 475 | |
90da63e5 | 476 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 477 | |
1da177e4 LT |
478 | kfree(palette); |
479 | if (saved_pseudo_palette != NULL) | |
480 | info->pseudo_palette = saved_pseudo_palette; | |
481 | kfree(logo_new); | |
9c44e5f6 | 482 | kfree(logo_rotate); |
90da63e5 GU |
483 | return logo->height; |
484 | } | |
485 | ||
9900abfb GU |
486 | |
487 | #ifdef CONFIG_FB_LOGO_EXTRA | |
488 | ||
489 | #define FB_LOGO_EX_NUM_MAX 10 | |
490 | static struct logo_data_extra { | |
491 | const struct linux_logo *logo; | |
492 | unsigned int n; | |
493 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
494 | static unsigned int fb_logo_ex_num; | |
495 | ||
496 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
497 | { | |
498 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
499 | return; | |
500 | ||
501 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
502 | fb_logo_ex[fb_logo_ex_num].n = n; | |
503 | fb_logo_ex_num++; | |
504 | } | |
505 | ||
506 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
507 | unsigned int yres) | |
508 | { | |
509 | unsigned int i; | |
510 | ||
511 | /* FIXME: logo_ex supports only truecolor fb. */ | |
512 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
513 | fb_logo_ex_num = 0; | |
514 | ||
515 | for (i = 0; i < fb_logo_ex_num; i++) { | |
516 | height += fb_logo_ex[i].logo->height; | |
517 | if (height > yres) { | |
518 | height -= fb_logo_ex[i].logo->height; | |
519 | fb_logo_ex_num = i; | |
520 | break; | |
521 | } | |
522 | } | |
523 | return height; | |
524 | } | |
525 | ||
526 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
527 | { | |
528 | unsigned int i; | |
529 | ||
530 | for (i = 0; i < fb_logo_ex_num; i++) | |
531 | y += fb_show_logo_line(info, rotate, | |
532 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
533 | ||
534 | return y; | |
535 | } | |
536 | ||
537 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
538 | ||
539 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
540 | unsigned int height, | |
541 | unsigned int yres) | |
542 | { | |
543 | return height; | |
544 | } | |
545 | ||
546 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
547 | { | |
548 | return y; | |
549 | } | |
550 | ||
551 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
552 | ||
553 | ||
554 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
555 | { | |
556 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
557 | unsigned int yres; | |
558 | ||
559 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
560 | ||
561 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
562 | info->flags & FBINFO_MODULE) | |
563 | return 0; | |
564 | ||
565 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
566 | depth = info->var.blue.length; | |
567 | if (info->var.red.length < depth) | |
568 | depth = info->var.red.length; | |
569 | if (info->var.green.length < depth) | |
570 | depth = info->var.green.length; | |
571 | } | |
572 | ||
573 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
574 | /* assume console colormap */ | |
575 | depth = 4; | |
576 | } | |
577 | ||
9900abfb GU |
578 | /* Return if no suitable logo was found */ |
579 | fb_logo.logo = fb_find_logo(depth); | |
580 | ||
581 | if (!fb_logo.logo) { | |
582 | return 0; | |
583 | } | |
584 | ||
585 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
586 | yres = info->var.yres; | |
587 | else | |
588 | yres = info->var.xres; | |
589 | ||
590 | if (fb_logo.logo->height > yres) { | |
591 | fb_logo.logo = NULL; | |
592 | return 0; | |
593 | } | |
594 | ||
595 | /* What depth we asked for might be different from what we get */ | |
596 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
597 | fb_logo.depth = 8; | |
598 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
599 | fb_logo.depth = 4; | |
600 | else | |
601 | fb_logo.depth = 1; | |
602 | ||
1692b37c AD |
603 | |
604 | if (fb_logo.depth > 4 && depth > 4) { | |
605 | switch (info->fix.visual) { | |
606 | case FB_VISUAL_TRUECOLOR: | |
607 | fb_logo.needs_truepalette = 1; | |
608 | break; | |
609 | case FB_VISUAL_DIRECTCOLOR: | |
610 | fb_logo.needs_directpalette = 1; | |
611 | fb_logo.needs_cmapreset = 1; | |
612 | break; | |
613 | case FB_VISUAL_PSEUDOCOLOR: | |
614 | fb_logo.needs_cmapreset = 1; | |
615 | break; | |
616 | } | |
617 | } | |
618 | ||
9900abfb GU |
619 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
620 | } | |
621 | ||
90da63e5 GU |
622 | int fb_show_logo(struct fb_info *info, int rotate) |
623 | { | |
9900abfb GU |
624 | int y; |
625 | ||
626 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
627 | num_online_cpus()); | |
628 | y = fb_show_extra_logos(info, y, rotate); | |
629 | ||
630 | return y; | |
1da177e4 LT |
631 | } |
632 | #else | |
9c44e5f6 AD |
633 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
634 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
635 | #endif /* CONFIG_LOGO */ |
636 | ||
0aa16341 AD |
637 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
638 | { | |
639 | return (*pos < FB_MAX) ? pos : NULL; | |
640 | } | |
641 | ||
642 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
643 | { | |
644 | (*pos)++; | |
645 | return (*pos < FB_MAX) ? pos : NULL; | |
646 | } | |
647 | ||
648 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 649 | { |
1da177e4 LT |
650 | } |
651 | ||
0aa16341 AD |
652 | static int fb_seq_show(struct seq_file *m, void *v) |
653 | { | |
654 | int i = *(loff_t *)v; | |
655 | struct fb_info *fi = registered_fb[i]; | |
656 | ||
657 | if (fi) | |
658 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | static const struct seq_operations proc_fb_seq_ops = { | |
663 | .start = fb_seq_start, | |
664 | .next = fb_seq_next, | |
665 | .stop = fb_seq_stop, | |
666 | .show = fb_seq_show, | |
667 | }; | |
668 | ||
669 | static int proc_fb_open(struct inode *inode, struct file *file) | |
670 | { | |
671 | return seq_open(file, &proc_fb_seq_ops); | |
672 | } | |
673 | ||
674 | static const struct file_operations fb_proc_fops = { | |
675 | .owner = THIS_MODULE, | |
676 | .open = proc_fb_open, | |
677 | .read = seq_read, | |
678 | .llseek = seq_lseek, | |
679 | .release = seq_release, | |
680 | }; | |
681 | ||
1da177e4 LT |
682 | static ssize_t |
683 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
684 | { | |
685 | unsigned long p = *ppos; | |
ad9a824e | 686 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
687 | int fbidx = iminor(inode); |
688 | struct fb_info *info = registered_fb[fbidx]; | |
689 | u32 *buffer, *dst; | |
690 | u32 __iomem *src; | |
691 | int c, i, cnt = 0, err = 0; | |
692 | unsigned long total_size; | |
693 | ||
694 | if (!info || ! info->screen_base) | |
695 | return -ENODEV; | |
696 | ||
697 | if (info->state != FBINFO_STATE_RUNNING) | |
698 | return -EPERM; | |
699 | ||
700 | if (info->fbops->fb_read) | |
3f9b0880 | 701 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
702 | |
703 | total_size = info->screen_size; | |
0a484a3a | 704 | |
1da177e4 LT |
705 | if (total_size == 0) |
706 | total_size = info->fix.smem_len; | |
707 | ||
708 | if (p >= total_size) | |
0a484a3a AD |
709 | return 0; |
710 | ||
1da177e4 | 711 | if (count >= total_size) |
0a484a3a AD |
712 | count = total_size; |
713 | ||
1da177e4 LT |
714 | if (count + p > total_size) |
715 | count = total_size - p; | |
716 | ||
1da177e4 LT |
717 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
718 | GFP_KERNEL); | |
719 | if (!buffer) | |
720 | return -ENOMEM; | |
721 | ||
722 | src = (u32 __iomem *) (info->screen_base + p); | |
723 | ||
724 | if (info->fbops->fb_sync) | |
725 | info->fbops->fb_sync(info); | |
726 | ||
727 | while (count) { | |
728 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
729 | dst = buffer; | |
730 | for (i = c >> 2; i--; ) | |
731 | *dst++ = fb_readl(src++); | |
732 | if (c & 3) { | |
733 | u8 *dst8 = (u8 *) dst; | |
734 | u8 __iomem *src8 = (u8 __iomem *) src; | |
735 | ||
736 | for (i = c & 3; i--;) | |
737 | *dst8++ = fb_readb(src8++); | |
738 | ||
739 | src = (u32 __iomem *) src8; | |
740 | } | |
741 | ||
742 | if (copy_to_user(buf, buffer, c)) { | |
743 | err = -EFAULT; | |
744 | break; | |
745 | } | |
746 | *ppos += c; | |
747 | buf += c; | |
748 | cnt += c; | |
749 | count -= c; | |
750 | } | |
751 | ||
752 | kfree(buffer); | |
0a484a3a | 753 | |
1da177e4 LT |
754 | return (err) ? err : cnt; |
755 | } | |
756 | ||
757 | static ssize_t | |
758 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
759 | { | |
760 | unsigned long p = *ppos; | |
ad9a824e | 761 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
762 | int fbidx = iminor(inode); |
763 | struct fb_info *info = registered_fb[fbidx]; | |
764 | u32 *buffer, *src; | |
765 | u32 __iomem *dst; | |
0a484a3a | 766 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
767 | unsigned long total_size; |
768 | ||
769 | if (!info || !info->screen_base) | |
770 | return -ENODEV; | |
771 | ||
772 | if (info->state != FBINFO_STATE_RUNNING) | |
773 | return -EPERM; | |
774 | ||
775 | if (info->fbops->fb_write) | |
3f9b0880 | 776 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
777 | |
778 | total_size = info->screen_size; | |
0a484a3a | 779 | |
1da177e4 LT |
780 | if (total_size == 0) |
781 | total_size = info->fix.smem_len; | |
782 | ||
783 | if (p > total_size) | |
6a2a8866 | 784 | return -EFBIG; |
0a484a3a | 785 | |
6a2a8866 AD |
786 | if (count > total_size) { |
787 | err = -EFBIG; | |
0a484a3a | 788 | count = total_size; |
6a2a8866 AD |
789 | } |
790 | ||
791 | if (count + p > total_size) { | |
792 | if (!err) | |
793 | err = -ENOSPC; | |
0a484a3a | 794 | |
0a484a3a | 795 | count = total_size - p; |
6a2a8866 | 796 | } |
0a484a3a | 797 | |
1da177e4 LT |
798 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
799 | GFP_KERNEL); | |
800 | if (!buffer) | |
801 | return -ENOMEM; | |
802 | ||
803 | dst = (u32 __iomem *) (info->screen_base + p); | |
804 | ||
805 | if (info->fbops->fb_sync) | |
806 | info->fbops->fb_sync(info); | |
807 | ||
808 | while (count) { | |
809 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
810 | src = buffer; | |
0a484a3a | 811 | |
1da177e4 LT |
812 | if (copy_from_user(src, buf, c)) { |
813 | err = -EFAULT; | |
814 | break; | |
815 | } | |
0a484a3a | 816 | |
1da177e4 LT |
817 | for (i = c >> 2; i--; ) |
818 | fb_writel(*src++, dst++); | |
0a484a3a | 819 | |
1da177e4 LT |
820 | if (c & 3) { |
821 | u8 *src8 = (u8 *) src; | |
822 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
823 | ||
824 | for (i = c & 3; i--; ) | |
825 | fb_writeb(*src8++, dst8++); | |
826 | ||
827 | dst = (u32 __iomem *) dst8; | |
828 | } | |
0a484a3a | 829 | |
1da177e4 LT |
830 | *ppos += c; |
831 | buf += c; | |
832 | cnt += c; | |
833 | count -= c; | |
834 | } | |
0a484a3a | 835 | |
1da177e4 LT |
836 | kfree(buffer); |
837 | ||
6a2a8866 | 838 | return (cnt) ? cnt : err; |
1da177e4 LT |
839 | } |
840 | ||
841 | #ifdef CONFIG_KMOD | |
842 | static void try_to_load(int fb) | |
843 | { | |
844 | request_module("fb%d", fb); | |
845 | } | |
846 | #endif /* CONFIG_KMOD */ | |
847 | ||
848 | int | |
849 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
850 | { | |
1207069f | 851 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
852 | unsigned int yres = info->var.yres; |
853 | int err = 0; | |
1207069f AD |
854 | |
855 | if (var->yoffset > 0) { | |
856 | if (var->vmode & FB_VMODE_YWRAP) { | |
857 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
858 | err = -EINVAL; | |
859 | else | |
860 | yres = 0; | |
861 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
862 | err = -EINVAL; | |
863 | } | |
864 | ||
865 | if (var->xoffset > 0 && (!fix->xpanstep || | |
866 | (var->xoffset % fix->xpanstep))) | |
867 | err = -EINVAL; | |
868 | ||
7572a1ea VS |
869 | if (err || !info->fbops->fb_pan_display || |
870 | var->yoffset + yres > info->var.yres_virtual || | |
1207069f AD |
871 | var->xoffset + info->var.xres > info->var.xres_virtual) |
872 | return -EINVAL; | |
1da177e4 | 873 | |
1da177e4 LT |
874 | if ((err = info->fbops->fb_pan_display(var, info))) |
875 | return err; | |
876 | info->var.xoffset = var->xoffset; | |
877 | info->var.yoffset = var->yoffset; | |
878 | if (var->vmode & FB_VMODE_YWRAP) | |
879 | info->var.vmode |= FB_VMODE_YWRAP; | |
880 | else | |
881 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
882 | return 0; | |
883 | } | |
884 | ||
38a3dc51 AD |
885 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
886 | u32 activate) | |
887 | { | |
888 | struct fb_event event; | |
889 | struct fb_blit_caps caps, fbcaps; | |
890 | int err = 0; | |
891 | ||
892 | memset(&caps, 0, sizeof(caps)); | |
893 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
894 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
895 | event.info = info; | |
896 | event.data = ∩︀ | |
897 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
898 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
899 | ||
900 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
901 | ((fbcaps.y ^ caps.y) & caps.y) || | |
902 | (fbcaps.len < caps.len)) | |
903 | err = -EINVAL; | |
904 | ||
905 | return err; | |
906 | } | |
907 | ||
1da177e4 LT |
908 | int |
909 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
910 | { | |
b1e7223f AD |
911 | int flags = info->flags; |
912 | int ret = 0; | |
1da177e4 LT |
913 | |
914 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
915 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
916 | |
917 | fb_var_to_videomode(&mode1, var); | |
918 | fb_var_to_videomode(&mode2, &info->var); | |
919 | /* make sure we don't delete the videomode of current var */ | |
920 | ret = fb_mode_is_equal(&mode1, &mode2); | |
921 | ||
922 | if (!ret) { | |
923 | struct fb_event event; | |
924 | ||
925 | event.info = info; | |
926 | event.data = &mode1; | |
256154fb | 927 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
928 | } |
929 | ||
930 | if (!ret) | |
931 | fb_delete_videomode(&mode1, &info->modelist); | |
932 | ||
b1e7223f AD |
933 | |
934 | ret = (ret) ? -EINVAL : 0; | |
935 | goto done; | |
1da177e4 LT |
936 | } |
937 | ||
938 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
939 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
940 | u32 activate = var->activate; |
941 | ||
1da177e4 LT |
942 | if (!info->fbops->fb_check_var) { |
943 | *var = info->var; | |
b1e7223f | 944 | goto done; |
1da177e4 LT |
945 | } |
946 | ||
b1e7223f AD |
947 | ret = info->fbops->fb_check_var(var, info); |
948 | ||
949 | if (ret) | |
950 | goto done; | |
1da177e4 LT |
951 | |
952 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
953 | struct fb_videomode mode; | |
1da177e4 | 954 | |
38a3dc51 | 955 | if (info->fbops->fb_get_caps) { |
b1e7223f | 956 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 957 | |
b1e7223f | 958 | if (ret) |
38a3dc51 AD |
959 | goto done; |
960 | } | |
961 | ||
1da177e4 | 962 | info->var = *var; |
38a3dc51 | 963 | |
1da177e4 LT |
964 | if (info->fbops->fb_set_par) |
965 | info->fbops->fb_set_par(info); | |
966 | ||
967 | fb_pan_display(info, &info->var); | |
1da177e4 | 968 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
969 | fb_var_to_videomode(&mode, &info->var); |
970 | ||
971 | if (info->modelist.prev && info->modelist.next && | |
972 | !list_empty(&info->modelist)) | |
b1e7223f | 973 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 974 | |
b1e7223f | 975 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 976 | struct fb_event event; |
4941cb7a | 977 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
978 | FB_EVENT_MODE_CHANGE_ALL : |
979 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
980 | |
981 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
982 | event.info = info; | |
256154fb | 983 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
984 | } |
985 | } | |
986 | } | |
38a3dc51 AD |
987 | |
988 | done: | |
b1e7223f | 989 | return ret; |
1da177e4 LT |
990 | } |
991 | ||
992 | int | |
993 | fb_blank(struct fb_info *info, int blank) | |
994 | { | |
995 | int ret = -EINVAL; | |
996 | ||
997 | if (blank > FB_BLANK_POWERDOWN) | |
998 | blank = FB_BLANK_POWERDOWN; | |
999 | ||
1000 | if (info->fbops->fb_blank) | |
1001 | ret = info->fbops->fb_blank(blank, info); | |
1002 | ||
1003 | if (!ret) { | |
1004 | struct fb_event event; | |
1005 | ||
1006 | event.info = info; | |
1007 | event.data = ␣ | |
256154fb | 1008 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | static int | |
1015 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
1016 | unsigned long arg) | |
1017 | { | |
1018 | int fbidx = iminor(inode); | |
1019 | struct fb_info *info = registered_fb[fbidx]; | |
1020 | struct fb_ops *fb = info->fbops; | |
1021 | struct fb_var_screeninfo var; | |
1022 | struct fb_fix_screeninfo fix; | |
1023 | struct fb_con2fbmap con2fb; | |
1024 | struct fb_cmap_user cmap; | |
1025 | struct fb_event event; | |
1026 | void __user *argp = (void __user *)arg; | |
1027 | int i; | |
1028 | ||
1029 | if (!fb) | |
1030 | return -ENODEV; | |
1031 | switch (cmd) { | |
1032 | case FBIOGET_VSCREENINFO: | |
1033 | return copy_to_user(argp, &info->var, | |
1034 | sizeof(var)) ? -EFAULT : 0; | |
1035 | case FBIOPUT_VSCREENINFO: | |
1036 | if (copy_from_user(&var, argp, sizeof(var))) | |
1037 | return -EFAULT; | |
1038 | acquire_console_sem(); | |
1039 | info->flags |= FBINFO_MISC_USEREVENT; | |
1040 | i = fb_set_var(info, &var); | |
1041 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1042 | release_console_sem(); | |
1043 | if (i) return i; | |
1044 | if (copy_to_user(argp, &var, sizeof(var))) | |
1045 | return -EFAULT; | |
1046 | return 0; | |
1047 | case FBIOGET_FSCREENINFO: | |
1048 | return copy_to_user(argp, &info->fix, | |
1049 | sizeof(fix)) ? -EFAULT : 0; | |
1050 | case FBIOPUTCMAP: | |
1051 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1052 | return -EFAULT; | |
1053 | return (fb_set_user_cmap(&cmap, info)); | |
1054 | case FBIOGETCMAP: | |
1055 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1056 | return -EFAULT; | |
1057 | return fb_cmap_to_user(&info->cmap, &cmap); | |
1058 | case FBIOPAN_DISPLAY: | |
1059 | if (copy_from_user(&var, argp, sizeof(var))) | |
1060 | return -EFAULT; | |
1061 | acquire_console_sem(); | |
1062 | i = fb_pan_display(info, &var); | |
1063 | release_console_sem(); | |
1064 | if (i) | |
1065 | return i; | |
1066 | if (copy_to_user(argp, &var, sizeof(var))) | |
1067 | return -EFAULT; | |
1068 | return 0; | |
1069 | case FBIO_CURSOR: | |
1070 | return -EINVAL; | |
1071 | case FBIOGET_CON2FBMAP: | |
1072 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1073 | return -EFAULT; | |
1074 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1075 | return -EINVAL; | |
1076 | con2fb.framebuffer = -1; | |
1077 | event.info = info; | |
1078 | event.data = &con2fb; | |
256154fb | 1079 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1da177e4 LT |
1080 | return copy_to_user(argp, &con2fb, |
1081 | sizeof(con2fb)) ? -EFAULT : 0; | |
1082 | case FBIOPUT_CON2FBMAP: | |
1083 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1084 | return - EFAULT; | |
57a7a6db | 1085 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
1da177e4 LT |
1086 | return -EINVAL; |
1087 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
1088 | return -EINVAL; | |
1089 | #ifdef CONFIG_KMOD | |
1090 | if (!registered_fb[con2fb.framebuffer]) | |
1091 | try_to_load(con2fb.framebuffer); | |
1092 | #endif /* CONFIG_KMOD */ | |
1093 | if (!registered_fb[con2fb.framebuffer]) | |
1094 | return -EINVAL; | |
1095 | event.info = info; | |
1096 | event.data = &con2fb; | |
256154fb AD |
1097 | return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
1098 | &event); | |
1da177e4 LT |
1099 | case FBIOBLANK: |
1100 | acquire_console_sem(); | |
1101 | info->flags |= FBINFO_MISC_USEREVENT; | |
1102 | i = fb_blank(info, arg); | |
1103 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1104 | release_console_sem(); | |
1105 | return i; | |
1106 | default: | |
1107 | if (fb->fb_ioctl == NULL) | |
1108 | return -EINVAL; | |
67a6680d | 1109 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1110 | } |
1111 | } | |
1112 | ||
1113 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1114 | struct fb_fix_screeninfo32 { |
1115 | char id[16]; | |
1116 | compat_caddr_t smem_start; | |
1117 | u32 smem_len; | |
1118 | u32 type; | |
1119 | u32 type_aux; | |
1120 | u32 visual; | |
1121 | u16 xpanstep; | |
1122 | u16 ypanstep; | |
1123 | u16 ywrapstep; | |
1124 | u32 line_length; | |
1125 | compat_caddr_t mmio_start; | |
1126 | u32 mmio_len; | |
1127 | u32 accel; | |
1128 | u16 reserved[3]; | |
1129 | }; | |
1130 | ||
1131 | struct fb_cmap32 { | |
1132 | u32 start; | |
1133 | u32 len; | |
1134 | compat_caddr_t red; | |
1135 | compat_caddr_t green; | |
1136 | compat_caddr_t blue; | |
1137 | compat_caddr_t transp; | |
1138 | }; | |
1139 | ||
1140 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
1141 | unsigned int cmd, unsigned long arg) | |
1142 | { | |
1143 | struct fb_cmap_user __user *cmap; | |
1144 | struct fb_cmap32 __user *cmap32; | |
1145 | __u32 data; | |
1146 | int err; | |
1147 | ||
1148 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1149 | cmap32 = compat_ptr(arg); | |
1150 | ||
1151 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1152 | return -EFAULT; | |
1153 | ||
1154 | if (get_user(data, &cmap32->red) || | |
1155 | put_user(compat_ptr(data), &cmap->red) || | |
1156 | get_user(data, &cmap32->green) || | |
1157 | put_user(compat_ptr(data), &cmap->green) || | |
1158 | get_user(data, &cmap32->blue) || | |
1159 | put_user(compat_ptr(data), &cmap->blue) || | |
1160 | get_user(data, &cmap32->transp) || | |
1161 | put_user(compat_ptr(data), &cmap->transp)) | |
1162 | return -EFAULT; | |
1163 | ||
1164 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1165 | ||
1166 | if (!err) { | |
1167 | if (copy_in_user(&cmap32->start, | |
1168 | &cmap->start, | |
1169 | 2 * sizeof(__u32))) | |
1170 | err = -EFAULT; | |
1171 | } | |
1172 | return err; | |
1173 | } | |
1174 | ||
1175 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1176 | struct fb_fix_screeninfo32 __user *fix32) | |
1177 | { | |
1178 | __u32 data; | |
1179 | int err; | |
1180 | ||
1181 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1182 | ||
1183 | data = (__u32) (unsigned long) fix->smem_start; | |
1184 | err |= put_user(data, &fix32->smem_start); | |
1185 | ||
1186 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1187 | err |= put_user(fix->type, &fix32->type); | |
1188 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1189 | err |= put_user(fix->visual, &fix32->visual); | |
1190 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1191 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1192 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1193 | err |= put_user(fix->line_length, &fix32->line_length); | |
1194 | ||
1195 | data = (__u32) (unsigned long) fix->mmio_start; | |
1196 | err |= put_user(data, &fix32->mmio_start); | |
1197 | ||
1198 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1199 | err |= put_user(fix->accel, &fix32->accel); | |
1200 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1201 | sizeof(fix->reserved)); | |
1202 | ||
1203 | return err; | |
1204 | } | |
1205 | ||
1206 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1207 | unsigned int cmd, unsigned long arg) | |
1208 | { | |
1209 | mm_segment_t old_fs; | |
1210 | struct fb_fix_screeninfo fix; | |
1211 | struct fb_fix_screeninfo32 __user *fix32; | |
1212 | int err; | |
1213 | ||
1214 | fix32 = compat_ptr(arg); | |
1215 | ||
1216 | old_fs = get_fs(); | |
1217 | set_fs(KERNEL_DS); | |
1218 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1219 | set_fs(old_fs); | |
1220 | ||
1221 | if (!err) | |
1222 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1223 | ||
1224 | return err; | |
1225 | } | |
1226 | ||
1da177e4 LT |
1227 | static long |
1228 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1229 | { | |
ad9a824e | 1230 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1231 | int fbidx = iminor(inode); |
1da177e4 LT |
1232 | struct fb_info *info = registered_fb[fbidx]; |
1233 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1234 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1235 | |
1da177e4 | 1236 | lock_kernel(); |
c7f82d9c AB |
1237 | switch(cmd) { |
1238 | case FBIOGET_VSCREENINFO: | |
1239 | case FBIOPUT_VSCREENINFO: | |
1240 | case FBIOPAN_DISPLAY: | |
1241 | case FBIOGET_CON2FBMAP: | |
1242 | case FBIOPUT_CON2FBMAP: | |
1243 | arg = (unsigned long) compat_ptr(arg); | |
1244 | case FBIOBLANK: | |
1245 | ret = fb_ioctl(inode, file, cmd, arg); | |
1246 | break; | |
1247 | ||
1248 | case FBIOGET_FSCREENINFO: | |
1249 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1250 | break; | |
1251 | ||
1252 | case FBIOGETCMAP: | |
1253 | case FBIOPUTCMAP: | |
1254 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1255 | break; | |
1256 | ||
1257 | default: | |
1258 | if (fb->fb_compat_ioctl) | |
67a6680d | 1259 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1260 | break; |
1261 | } | |
1da177e4 LT |
1262 | unlock_kernel(); |
1263 | return ret; | |
1264 | } | |
1265 | #endif | |
1266 | ||
10eb2659 | 1267 | static int |
1da177e4 LT |
1268 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1269 | { | |
ad9a824e | 1270 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1271 | struct fb_info *info = registered_fb[fbidx]; |
1272 | struct fb_ops *fb = info->fbops; | |
1273 | unsigned long off; | |
1da177e4 LT |
1274 | unsigned long start; |
1275 | u32 len; | |
1da177e4 LT |
1276 | |
1277 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1278 | return -EINVAL; | |
1279 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1280 | if (!fb) | |
1281 | return -ENODEV; | |
1282 | if (fb->fb_mmap) { | |
1283 | int res; | |
1284 | lock_kernel(); | |
216d526c | 1285 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1286 | unlock_kernel(); |
1287 | return res; | |
1288 | } | |
1289 | ||
1da177e4 LT |
1290 | lock_kernel(); |
1291 | ||
1292 | /* frame buffer memory */ | |
1293 | start = info->fix.smem_start; | |
1294 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1295 | if (off >= len) { | |
1296 | /* memory mapped io */ | |
1297 | off -= len; | |
1298 | if (info->var.accel_flags) { | |
1299 | unlock_kernel(); | |
1300 | return -EINVAL; | |
1301 | } | |
1302 | start = info->fix.mmio_start; | |
1303 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1304 | } | |
1305 | unlock_kernel(); | |
1306 | start &= PAGE_MASK; | |
1307 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1308 | return -EINVAL; | |
1309 | off += start; | |
1310 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1311 | /* This is an IO map - tell maydump to skip this VMA */ | |
1312 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1313 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1314 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1315 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1316 | return -EAGAIN; | |
1da177e4 | 1317 | return 0; |
1da177e4 LT |
1318 | } |
1319 | ||
1320 | static int | |
1321 | fb_open(struct inode *inode, struct file *file) | |
1322 | { | |
1323 | int fbidx = iminor(inode); | |
1324 | struct fb_info *info; | |
1325 | int res = 0; | |
1326 | ||
1327 | if (fbidx >= FB_MAX) | |
1328 | return -ENODEV; | |
fc7f687a | 1329 | lock_kernel(); |
1da177e4 LT |
1330 | #ifdef CONFIG_KMOD |
1331 | if (!(info = registered_fb[fbidx])) | |
1332 | try_to_load(fbidx); | |
1333 | #endif /* CONFIG_KMOD */ | |
fc7f687a JC |
1334 | if (!(info = registered_fb[fbidx])) { |
1335 | res = -ENODEV; | |
1336 | goto out; | |
1337 | } | |
1338 | if (!try_module_get(info->fbops->owner)) { | |
1339 | res = -ENODEV; | |
1340 | goto out; | |
1341 | } | |
cae8a12f | 1342 | file->private_data = info; |
1da177e4 LT |
1343 | if (info->fbops->fb_open) { |
1344 | res = info->fbops->fb_open(info,1); | |
1345 | if (res) | |
1346 | module_put(info->fbops->owner); | |
1347 | } | |
fc7f687a JC |
1348 | out: |
1349 | unlock_kernel(); | |
1da177e4 LT |
1350 | return res; |
1351 | } | |
1352 | ||
1353 | static int | |
1354 | fb_release(struct inode *inode, struct file *file) | |
1355 | { | |
cae8a12f | 1356 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1357 | |
1358 | lock_kernel(); | |
1da177e4 LT |
1359 | if (info->fbops->fb_release) |
1360 | info->fbops->fb_release(info,1); | |
1361 | module_put(info->fbops->owner); | |
1362 | unlock_kernel(); | |
1363 | return 0; | |
1364 | } | |
1365 | ||
0128beee | 1366 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1367 | .owner = THIS_MODULE, |
1368 | .read = fb_read, | |
1369 | .write = fb_write, | |
1370 | .ioctl = fb_ioctl, | |
1371 | #ifdef CONFIG_COMPAT | |
1372 | .compat_ioctl = fb_compat_ioctl, | |
1373 | #endif | |
1374 | .mmap = fb_mmap, | |
1375 | .open = fb_open, | |
1376 | .release = fb_release, | |
1377 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1378 | .get_unmapped_area = get_fb_unmapped_area, | |
1379 | #endif | |
5e841b88 PM |
1380 | #ifdef CONFIG_FB_DEFERRED_IO |
1381 | .fsync = fb_deferred_io_fsync, | |
1382 | #endif | |
1da177e4 LT |
1383 | }; |
1384 | ||
9a179176 AD |
1385 | struct class *fb_class; |
1386 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1387 | |
1388 | static int fb_check_foreignness(struct fb_info *fi) | |
1389 | { | |
1390 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1391 | ||
1392 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1393 | ||
1394 | #ifdef __BIG_ENDIAN | |
1395 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1396 | #else | |
1397 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1398 | #endif /* __BIG_ENDIAN */ | |
1399 | ||
1400 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1401 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1402 | "support this framebuffer\n", fi->fix.id); | |
1403 | return -ENOSYS; | |
1404 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1405 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1406 | "support this framebuffer\n", fi->fix.id); | |
1407 | return -ENOSYS; | |
1408 | } | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
1da177e4 LT |
1413 | /** |
1414 | * register_framebuffer - registers a frame buffer device | |
1415 | * @fb_info: frame buffer info structure | |
1416 | * | |
1417 | * Registers a frame buffer device @fb_info. | |
1418 | * | |
1419 | * Returns negative errno on error, or zero for success. | |
1420 | * | |
1421 | */ | |
1422 | ||
1423 | int | |
1424 | register_framebuffer(struct fb_info *fb_info) | |
1425 | { | |
1426 | int i; | |
1427 | struct fb_event event; | |
96fe6a21 | 1428 | struct fb_videomode mode; |
1da177e4 LT |
1429 | |
1430 | if (num_registered_fb == FB_MAX) | |
1431 | return -ENXIO; | |
e4c690e0 AV |
1432 | |
1433 | if (fb_check_foreignness(fb_info)) | |
1434 | return -ENOSYS; | |
1435 | ||
1da177e4 LT |
1436 | num_registered_fb++; |
1437 | for (i = 0 ; i < FB_MAX; i++) | |
1438 | if (!registered_fb[i]) | |
1439 | break; | |
1440 | fb_info->node = i; | |
1441 | ||
1e274401 GKH |
1442 | fb_info->dev = device_create_drvdata(fb_class, fb_info->device, |
1443 | MKDEV(FB_MAJOR, i), NULL, | |
1444 | "fb%d", i); | |
78cde088 | 1445 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1446 | /* Not fatal */ |
78cde088 GKH |
1447 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1448 | fb_info->dev = NULL; | |
1da177e4 | 1449 | } else |
78cde088 | 1450 | fb_init_device(fb_info); |
1da177e4 LT |
1451 | |
1452 | if (fb_info->pixmap.addr == NULL) { | |
1453 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1454 | if (fb_info->pixmap.addr) { | |
1455 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1456 | fb_info->pixmap.buf_align = 1; | |
1457 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1458 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1459 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1460 | } | |
1461 | } | |
1462 | fb_info->pixmap.offset = 0; | |
1463 | ||
bf26ad72 AD |
1464 | if (!fb_info->pixmap.blit_x) |
1465 | fb_info->pixmap.blit_x = ~(u32)0; | |
1466 | ||
1467 | if (!fb_info->pixmap.blit_y) | |
1468 | fb_info->pixmap.blit_y = ~(u32)0; | |
1469 | ||
96fe6a21 | 1470 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1471 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1472 | |
96fe6a21 AD |
1473 | fb_var_to_videomode(&mode, &fb_info->var); |
1474 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1475 | registered_fb[i] = fb_info; |
1476 | ||
1da177e4 | 1477 | event.info = fb_info; |
256154fb | 1478 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1479 | return 0; |
1480 | } | |
1481 | ||
1482 | ||
1483 | /** | |
1484 | * unregister_framebuffer - releases a frame buffer device | |
1485 | * @fb_info: frame buffer info structure | |
1486 | * | |
1487 | * Unregisters a frame buffer device @fb_info. | |
1488 | * | |
1489 | * Returns negative errno on error, or zero for success. | |
1490 | * | |
cfafca80 JB |
1491 | * This function will also notify the framebuffer console |
1492 | * to release the driver. | |
1493 | * | |
1494 | * This is meant to be called within a driver's module_exit() | |
1495 | * function. If this is called outside module_exit(), ensure | |
1496 | * that the driver implements fb_open() and fb_release() to | |
1497 | * check that no processes are using the device. | |
1da177e4 LT |
1498 | */ |
1499 | ||
1500 | int | |
1501 | unregister_framebuffer(struct fb_info *fb_info) | |
1502 | { | |
e614b18d | 1503 | struct fb_event event; |
cfafca80 | 1504 | int i, ret = 0; |
1da177e4 LT |
1505 | |
1506 | i = fb_info->node; | |
cfafca80 JB |
1507 | if (!registered_fb[i]) { |
1508 | ret = -EINVAL; | |
1509 | goto done; | |
1510 | } | |
1511 | ||
1512 | event.info = fb_info; | |
1513 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
1514 | ||
1515 | if (ret) { | |
1516 | ret = -EINVAL; | |
1517 | goto done; | |
1518 | } | |
1da177e4 | 1519 | |
e614b18d AD |
1520 | if (fb_info->pixmap.addr && |
1521 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1522 | kfree(fb_info->pixmap.addr); |
1523 | fb_destroy_modelist(&fb_info->modelist); | |
1524 | registered_fb[i]=NULL; | |
1525 | num_registered_fb--; | |
78cde088 GKH |
1526 | fb_cleanup_device(fb_info); |
1527 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1528 | event.info = fb_info; |
256154fb | 1529 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
cfafca80 JB |
1530 | done: |
1531 | return ret; | |
1da177e4 LT |
1532 | } |
1533 | ||
1da177e4 LT |
1534 | /** |
1535 | * fb_set_suspend - low level driver signals suspend | |
1536 | * @info: framebuffer affected | |
1537 | * @state: 0 = resuming, !=0 = suspending | |
1538 | * | |
1539 | * This is meant to be used by low level drivers to | |
1540 | * signal suspend/resume to the core & clients. | |
1541 | * It must be called with the console semaphore held | |
1542 | */ | |
1543 | void fb_set_suspend(struct fb_info *info, int state) | |
1544 | { | |
1545 | struct fb_event event; | |
1546 | ||
1547 | event.info = info; | |
1548 | if (state) { | |
256154fb | 1549 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1550 | info->state = FBINFO_STATE_SUSPENDED; |
1551 | } else { | |
1552 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1553 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1554 | } |
1555 | } | |
1556 | ||
1557 | /** | |
1558 | * fbmem_init - init frame buffer subsystem | |
1559 | * | |
1560 | * Initialize the frame buffer subsystem. | |
1561 | * | |
1562 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1563 | * | |
1564 | */ | |
1565 | ||
1566 | static int __init | |
1567 | fbmem_init(void) | |
1568 | { | |
0aa16341 | 1569 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1570 | |
1da177e4 LT |
1571 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1572 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1573 | ||
56b22935 | 1574 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1575 | if (IS_ERR(fb_class)) { |
1576 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1577 | fb_class = NULL; | |
1578 | } | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | #ifdef MODULE | |
1583 | module_init(fbmem_init); | |
1584 | static void __exit | |
1585 | fbmem_exit(void) | |
1586 | { | |
c43f89c2 | 1587 | remove_proc_entry("fb", NULL); |
56b22935 | 1588 | class_destroy(fb_class); |
5a340cce | 1589 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1590 | } |
1591 | ||
1592 | module_exit(fbmem_exit); | |
1593 | MODULE_LICENSE("GPL"); | |
1594 | MODULE_DESCRIPTION("Framebuffer base"); | |
1595 | #else | |
1596 | subsys_initcall(fbmem_init); | |
1597 | #endif | |
1598 | ||
1599 | int fb_new_modelist(struct fb_info *info) | |
1600 | { | |
1601 | struct fb_event event; | |
1602 | struct fb_var_screeninfo var = info->var; | |
1603 | struct list_head *pos, *n; | |
1604 | struct fb_modelist *modelist; | |
1605 | struct fb_videomode *m, mode; | |
1606 | int err = 1; | |
1607 | ||
1608 | list_for_each_safe(pos, n, &info->modelist) { | |
1609 | modelist = list_entry(pos, struct fb_modelist, list); | |
1610 | m = &modelist->mode; | |
1611 | fb_videomode_to_var(&var, m); | |
1612 | var.activate = FB_ACTIVATE_TEST; | |
1613 | err = fb_set_var(info, &var); | |
1614 | fb_var_to_videomode(&mode, &var); | |
1615 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1616 | list_del(pos); | |
1617 | kfree(pos); | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | err = 1; | |
1622 | ||
1623 | if (!list_empty(&info->modelist)) { | |
1624 | event.info = info; | |
256154fb | 1625 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1626 | } |
1627 | ||
1628 | return err; | |
1629 | } | |
1630 | ||
0128beee HD |
1631 | static char *video_options[FB_MAX] __read_mostly; |
1632 | static int ofonly __read_mostly; | |
1da177e4 LT |
1633 | |
1634 | /** | |
1635 | * fb_get_options - get kernel boot parameters | |
1636 | * @name: framebuffer name as it would appear in | |
1637 | * the boot parameter line | |
1638 | * (video=<name>:<options>) | |
1639 | * @option: the option will be stored here | |
1640 | * | |
1641 | * NOTE: Needed to maintain backwards compatibility | |
1642 | */ | |
1643 | int fb_get_options(char *name, char **option) | |
1644 | { | |
1645 | char *opt, *options = NULL; | |
1646 | int opt_len, retval = 0; | |
1647 | int name_len = strlen(name), i; | |
1648 | ||
1649 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1650 | retval = 1; | |
1651 | ||
1652 | if (name_len && !retval) { | |
1653 | for (i = 0; i < FB_MAX; i++) { | |
1654 | if (video_options[i] == NULL) | |
1655 | continue; | |
1656 | opt_len = strlen(video_options[i]); | |
1657 | if (!opt_len) | |
1658 | continue; | |
1659 | opt = video_options[i]; | |
1660 | if (!strncmp(name, opt, name_len) && | |
1661 | opt[name_len] == ':') | |
1662 | options = opt + name_len + 1; | |
1663 | } | |
1664 | } | |
1665 | if (options && !strncmp(options, "off", 3)) | |
1666 | retval = 1; | |
1667 | ||
1668 | if (option) | |
1669 | *option = options; | |
1670 | ||
1671 | return retval; | |
1672 | } | |
1673 | ||
bc6d7fdf | 1674 | #ifndef MODULE |
1da177e4 LT |
1675 | /** |
1676 | * video_setup - process command line options | |
1677 | * @options: string of options | |
1678 | * | |
1679 | * Process command line options for frame buffer subsystem. | |
1680 | * | |
1681 | * NOTE: This function is a __setup and __init function. | |
1682 | * It only stores the options. Drivers have to call | |
1683 | * fb_get_options() as necessary. | |
1684 | * | |
1685 | * Returns zero. | |
1686 | * | |
1687 | */ | |
75c96f85 | 1688 | static int __init video_setup(char *options) |
1da177e4 LT |
1689 | { |
1690 | int i, global = 0; | |
1691 | ||
1692 | if (!options || !*options) | |
1693 | global = 1; | |
1694 | ||
1695 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1696 | ofonly = 1; | |
1697 | global = 1; | |
1698 | } | |
1699 | ||
1700 | if (!global && !strstr(options, "fb:")) { | |
9a054fba | 1701 | fb_mode_option = options; |
1da177e4 LT |
1702 | global = 1; |
1703 | } | |
1704 | ||
1705 | if (!global) { | |
1706 | for (i = 0; i < FB_MAX; i++) { | |
1707 | if (video_options[i] == NULL) { | |
1708 | video_options[i] = options; | |
1709 | break; | |
1710 | } | |
1711 | ||
1712 | } | |
1713 | } | |
1714 | ||
9b41046c | 1715 | return 1; |
1da177e4 LT |
1716 | } |
1717 | __setup("video=", video_setup); | |
bc6d7fdf | 1718 | #endif |
1da177e4 LT |
1719 | |
1720 | /* | |
1721 | * Visible symbols for modules | |
1722 | */ | |
1723 | ||
1724 | EXPORT_SYMBOL(register_framebuffer); | |
1725 | EXPORT_SYMBOL(unregister_framebuffer); | |
1726 | EXPORT_SYMBOL(num_registered_fb); | |
1727 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1728 | EXPORT_SYMBOL(fb_show_logo); |
1729 | EXPORT_SYMBOL(fb_set_var); | |
1730 | EXPORT_SYMBOL(fb_blank); | |
1731 | EXPORT_SYMBOL(fb_pan_display); | |
1732 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1733 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1734 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1735 | |
1736 | MODULE_LICENSE("GPL"); |