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Commit | Line | Data |
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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> | |
29 | #include <linux/console.h> | |
30 | #ifdef CONFIG_KMOD | |
31 | #include <linux/kmod.h> | |
32 | #endif | |
1da177e4 | 33 | #include <linux/err.h> |
1da177e4 LT |
34 | #include <linux/device.h> |
35 | #include <linux/efi.h> | |
10eb2659 | 36 | #include <linux/fb.h> |
1da177e4 | 37 | |
10eb2659 | 38 | #include <asm/fb.h> |
1da177e4 | 39 | |
1da177e4 LT |
40 | |
41 | /* | |
42 | * Frame buffer device initialization and setup routines | |
43 | */ | |
44 | ||
45 | #define FBPIXMAPSIZE (1024 * 8) | |
46 | ||
0128beee HD |
47 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
48 | int num_registered_fb __read_mostly; | |
1da177e4 LT |
49 | |
50 | /* | |
51 | * Helpers | |
52 | */ | |
53 | ||
b8c90945 AD |
54 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
55 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 56 | { |
b8c90945 AD |
57 | int depth = 0; |
58 | ||
59 | if (fix->visual == FB_VISUAL_MONO01 || | |
60 | fix->visual == FB_VISUAL_MONO10) | |
61 | depth = 1; | |
62 | else { | |
63 | if (var->green.length == var->blue.length && | |
64 | var->green.length == var->red.length && | |
65 | var->green.offset == var->blue.offset && | |
66 | var->green.offset == var->red.offset) | |
67 | depth = var->green.length; | |
68 | else | |
69 | depth = var->green.length + var->red.length + | |
70 | var->blue.length; | |
71 | } | |
72 | ||
73 | return depth; | |
1da177e4 LT |
74 | } |
75 | EXPORT_SYMBOL(fb_get_color_depth); | |
76 | ||
77 | /* | |
f5a9951c | 78 | * Data padding functions. |
1da177e4 | 79 | */ |
f1ab5dac | 80 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 81 | { |
829e79b6 | 82 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 83 | } |
f1ab5dac | 84 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 85 | |
f1ab5dac JS |
86 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
87 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
88 | { |
89 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
90 | int i, j; | |
91 | ||
92 | for (i = height; i--; ) { | |
93 | for (j = 0; j < idx; j++) { | |
94 | tmp = dst[j]; | |
95 | tmp &= mask; | |
96 | tmp |= *src >> shift_low; | |
97 | dst[j] = tmp; | |
98 | tmp = *src << shift_high; | |
99 | dst[j+1] = tmp; | |
100 | src++; | |
101 | } | |
102 | tmp = dst[idx]; | |
103 | tmp &= mask; | |
104 | tmp |= *src >> shift_low; | |
105 | dst[idx] = tmp; | |
106 | if (shift_high < mod) { | |
107 | tmp = *src << shift_high; | |
108 | dst[idx+1] = tmp; | |
109 | } | |
110 | src++; | |
111 | dst += d_pitch; | |
112 | } | |
113 | } | |
f1ab5dac | 114 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
115 | |
116 | /* | |
117 | * we need to lock this section since fb_cursor | |
118 | * may use fb_imageblit() | |
119 | */ | |
120 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
121 | { | |
122 | u32 align = buf->buf_align - 1, offset; | |
123 | char *addr = buf->addr; | |
124 | ||
125 | /* If IO mapped, we need to sync before access, no sharing of | |
126 | * the pixmap is done | |
127 | */ | |
128 | if (buf->flags & FB_PIXMAP_IO) { | |
129 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
130 | info->fbops->fb_sync(info); | |
131 | return addr; | |
132 | } | |
133 | ||
134 | /* See if we fit in the remaining pixmap space */ | |
135 | offset = buf->offset + align; | |
136 | offset &= ~align; | |
137 | if (offset + size > buf->size) { | |
138 | /* We do not fit. In order to be able to re-use the buffer, | |
139 | * we must ensure no asynchronous DMA'ing or whatever operation | |
140 | * is in progress, we sync for that. | |
141 | */ | |
142 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
143 | info->fbops->fb_sync(info); | |
144 | offset = 0; | |
145 | } | |
146 | buf->offset = offset + size; | |
147 | addr += offset; | |
148 | ||
149 | return addr; | |
150 | } | |
151 | ||
152 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
153 | |
154 | static inline unsigned safe_shift(unsigned d, int n) | |
155 | { | |
156 | return n < 0 ? d >> -n : d << n; | |
157 | } | |
158 | ||
159 | static void fb_set_logocmap(struct fb_info *info, | |
160 | const struct linux_logo *logo) | |
161 | { | |
162 | struct fb_cmap palette_cmap; | |
163 | u16 palette_green[16]; | |
164 | u16 palette_blue[16]; | |
165 | u16 palette_red[16]; | |
166 | int i, j, n; | |
167 | const unsigned char *clut = logo->clut; | |
168 | ||
169 | palette_cmap.start = 0; | |
170 | palette_cmap.len = 16; | |
171 | palette_cmap.red = palette_red; | |
172 | palette_cmap.green = palette_green; | |
173 | palette_cmap.blue = palette_blue; | |
174 | palette_cmap.transp = NULL; | |
175 | ||
176 | for (i = 0; i < logo->clutsize; i += n) { | |
177 | n = logo->clutsize - i; | |
178 | /* palette_cmap provides space for only 16 colors at once */ | |
179 | if (n > 16) | |
180 | n = 16; | |
181 | palette_cmap.start = 32 + i; | |
182 | palette_cmap.len = n; | |
183 | for (j = 0; j < n; ++j) { | |
184 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
185 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
186 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
187 | clut += 3; | |
188 | } | |
189 | fb_set_cmap(&palette_cmap, info); | |
190 | } | |
191 | } | |
192 | ||
193 | static void fb_set_logo_truepalette(struct fb_info *info, | |
194 | const struct linux_logo *logo, | |
195 | u32 *palette) | |
196 | { | |
0128beee | 197 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
198 | unsigned char redmask, greenmask, bluemask; |
199 | int redshift, greenshift, blueshift; | |
200 | int i; | |
201 | const unsigned char *clut = logo->clut; | |
202 | ||
203 | /* | |
204 | * We have to create a temporary palette since console palette is only | |
205 | * 16 colors long. | |
206 | */ | |
207 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
208 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
209 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
210 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
211 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
212 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
213 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
214 | ||
215 | for ( i = 0; i < logo->clutsize; i++) { | |
216 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
217 | safe_shift((clut[1] & greenmask), greenshift) | | |
218 | safe_shift((clut[2] & bluemask), blueshift)); | |
219 | clut += 3; | |
220 | } | |
221 | } | |
222 | ||
223 | static void fb_set_logo_directpalette(struct fb_info *info, | |
224 | const struct linux_logo *logo, | |
225 | u32 *palette) | |
226 | { | |
227 | int redshift, greenshift, blueshift; | |
228 | int i; | |
229 | ||
230 | redshift = info->var.red.offset; | |
231 | greenshift = info->var.green.offset; | |
232 | blueshift = info->var.blue.offset; | |
233 | ||
234 | for (i = 32; i < logo->clutsize; i++) | |
235 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
236 | } | |
237 | ||
238 | static void fb_set_logo(struct fb_info *info, | |
239 | const struct linux_logo *logo, u8 *dst, | |
240 | int depth) | |
241 | { | |
b8c90945 | 242 | int i, j, k; |
1da177e4 | 243 | const u8 *src = logo->data; |
b8c90945 AD |
244 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
245 | u8 fg = 1, d; | |
1da177e4 | 246 | |
b8c90945 | 247 | if (fb_get_color_depth(&info->var, &info->fix) == 3) |
1da177e4 LT |
248 | fg = 7; |
249 | ||
b8c90945 AD |
250 | if (info->fix.visual == FB_VISUAL_MONO01 || |
251 | info->fix.visual == FB_VISUAL_MONO10) | |
252 | fg = ~((u8) (0xfff << info->var.green.length)); | |
253 | ||
1da177e4 LT |
254 | switch (depth) { |
255 | case 4: | |
256 | for (i = 0; i < logo->height; i++) | |
257 | for (j = 0; j < logo->width; src++) { | |
258 | *dst++ = *src >> 4; | |
259 | j++; | |
260 | if (j < logo->width) { | |
261 | *dst++ = *src & 0x0f; | |
262 | j++; | |
263 | } | |
264 | } | |
265 | break; | |
266 | case 1: | |
267 | for (i = 0; i < logo->height; i++) { | |
268 | for (j = 0; j < logo->width; src++) { | |
269 | d = *src ^ xor; | |
270 | for (k = 7; k >= 0; k--) { | |
271 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
272 | j++; | |
273 | } | |
274 | } | |
275 | } | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
280 | /* | |
281 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
282 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
283 | * the visual format and color depth of the framebuffer, the DAC, the | |
284 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
285 | * | |
286 | * Case 1 - linux_logo_clut224: | |
287 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
288 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
289 | * | |
290 | * For visuals that require color info from the pseudo_palette, we also construct | |
291 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
292 | * will be set. | |
293 | * | |
294 | * Case 2 - linux_logo_vga16: | |
295 | * The number of colors just matches the console colors, thus there is no need | |
296 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
297 | * each byte contains color information for two pixels (upper and lower nibble). | |
298 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
299 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
300 | * | |
301 | * Case 3 - linux_logo_mono: | |
302 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
303 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
304 | * be set to 1. | |
305 | */ | |
306 | static struct logo_data { | |
307 | int depth; | |
308 | int needs_directpalette; | |
309 | int needs_truepalette; | |
310 | int needs_cmapreset; | |
311 | const struct linux_logo *logo; | |
0128beee | 312 | } fb_logo __read_mostly; |
1da177e4 | 313 | |
9c44e5f6 AD |
314 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
315 | { | |
316 | u32 size = width * height, i; | |
317 | ||
318 | out += size - 1; | |
319 | ||
320 | for (i = size; i--; ) | |
321 | *out-- = *in++; | |
322 | } | |
323 | ||
324 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
325 | { | |
f837e6f7 | 326 | int i, j, h = height - 1; |
9c44e5f6 AD |
327 | |
328 | for (i = 0; i < height; i++) | |
329 | for (j = 0; j < width; j++) | |
f837e6f7 | 330 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
331 | } |
332 | ||
333 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
334 | { | |
335 | int i, j, w = width - 1; | |
336 | ||
337 | for (i = 0; i < height; i++) | |
338 | for (j = 0; j < width; j++) | |
339 | out[height * (w - j) + i] = *in++; | |
340 | } | |
341 | ||
342 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
343 | struct fb_image *image, int rotate) | |
344 | { | |
345 | u32 tmp; | |
346 | ||
347 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
348 | fb_rotate_logo_ud(image->data, dst, image->width, |
349 | image->height); | |
abed5d15 GU |
350 | image->dx = info->var.xres - image->width - image->dx; |
351 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 352 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
353 | fb_rotate_logo_cw(image->data, dst, image->width, |
354 | image->height); | |
9c44e5f6 AD |
355 | tmp = image->width; |
356 | image->width = image->height; | |
357 | image->height = tmp; | |
abed5d15 GU |
358 | tmp = image->dy; |
359 | image->dy = image->dx; | |
360 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 361 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
362 | fb_rotate_logo_ccw(image->data, dst, image->width, |
363 | image->height); | |
f837e6f7 AD |
364 | tmp = image->width; |
365 | image->width = image->height; | |
366 | image->height = tmp; | |
abed5d15 GU |
367 | tmp = image->dx; |
368 | image->dx = image->dy; | |
369 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
370 | } |
371 | ||
372 | image->data = dst; | |
373 | } | |
374 | ||
375 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 376 | int rotate, unsigned int num) |
9c44e5f6 | 377 | { |
448d4797 | 378 | unsigned int x; |
9c44e5f6 AD |
379 | |
380 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
381 | for (x = 0; |
382 | x < num && image->dx + image->width <= info->var.xres; | |
383 | x++) { | |
9c44e5f6 | 384 | info->fbops->fb_imageblit(info, image); |
448d4797 | 385 | image->dx += image->width + 8; |
9c44e5f6 AD |
386 | } |
387 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 388 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 389 | info->fbops->fb_imageblit(info, image); |
448d4797 | 390 | image->dx -= image->width + 8; |
9c44e5f6 AD |
391 | } |
392 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
393 | for (x = 0; |
394 | x < num && image->dy + image->height <= info->var.yres; | |
395 | x++) { | |
9c44e5f6 | 396 | info->fbops->fb_imageblit(info, image); |
448d4797 | 397 | image->dy += image->height + 8; |
9c44e5f6 AD |
398 | } |
399 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 400 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 401 | info->fbops->fb_imageblit(info, image); |
448d4797 | 402 | image->dy -= image->height + 8; |
9c44e5f6 AD |
403 | } |
404 | } | |
405 | } | |
406 | ||
407 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
1da177e4 | 408 | { |
b8c90945 | 409 | int depth = fb_get_color_depth(&info->var, &info->fix); |
9c44e5f6 | 410 | int yres; |
1da177e4 LT |
411 | |
412 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
413 | ||
70802c60 AD |
414 | if (info->flags & FBINFO_MISC_TILEBLITTING || |
415 | info->flags & FBINFO_MODULE) | |
1da177e4 LT |
416 | return 0; |
417 | ||
418 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
419 | depth = info->var.blue.length; | |
420 | if (info->var.red.length < depth) | |
421 | depth = info->var.red.length; | |
422 | if (info->var.green.length < depth) | |
423 | depth = info->var.green.length; | |
424 | } | |
425 | ||
0c683dbf | 426 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
397eeab3 AD |
427 | /* assume console colormap */ |
428 | depth = 4; | |
429 | } | |
430 | ||
1da177e4 LT |
431 | if (depth >= 8) { |
432 | switch (info->fix.visual) { | |
433 | case FB_VISUAL_TRUECOLOR: | |
434 | fb_logo.needs_truepalette = 1; | |
435 | break; | |
436 | case FB_VISUAL_DIRECTCOLOR: | |
437 | fb_logo.needs_directpalette = 1; | |
438 | fb_logo.needs_cmapreset = 1; | |
439 | break; | |
440 | case FB_VISUAL_PSEUDOCOLOR: | |
441 | fb_logo.needs_cmapreset = 1; | |
442 | break; | |
443 | } | |
444 | } | |
445 | ||
446 | /* Return if no suitable logo was found */ | |
447 | fb_logo.logo = fb_find_logo(depth); | |
6d9885a8 JS |
448 | |
449 | if (!fb_logo.logo) { | |
450 | return 0; | |
451 | } | |
1da177e4 | 452 | |
9c44e5f6 AD |
453 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
454 | yres = info->var.yres; | |
455 | else | |
456 | yres = info->var.xres; | |
457 | ||
6d9885a8 | 458 | if (fb_logo.logo->height > yres) { |
1da177e4 LT |
459 | fb_logo.logo = NULL; |
460 | return 0; | |
461 | } | |
9c44e5f6 | 462 | |
1da177e4 LT |
463 | /* What depth we asked for might be different from what we get */ |
464 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
465 | fb_logo.depth = 8; | |
466 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
467 | fb_logo.depth = 4; | |
468 | else | |
469 | fb_logo.depth = 1; | |
470 | return fb_logo.logo->height; | |
471 | } | |
472 | ||
9c44e5f6 | 473 | int fb_show_logo(struct fb_info *info, int rotate) |
1da177e4 LT |
474 | { |
475 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 476 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 477 | struct fb_image image; |
1da177e4 LT |
478 | |
479 | /* Return if the frame buffer is not mapped or suspended */ | |
70802c60 AD |
480 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING || |
481 | info->flags & FBINFO_MODULE) | |
1da177e4 LT |
482 | return 0; |
483 | ||
484 | image.depth = 8; | |
485 | image.data = fb_logo.logo->data; | |
486 | ||
487 | if (fb_logo.needs_cmapreset) | |
488 | fb_set_logocmap(info, fb_logo.logo); | |
489 | ||
490 | if (fb_logo.needs_truepalette || | |
491 | fb_logo.needs_directpalette) { | |
492 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
493 | if (palette == NULL) | |
494 | return 0; | |
495 | ||
496 | if (fb_logo.needs_truepalette) | |
497 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
498 | else | |
499 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
500 | ||
501 | saved_pseudo_palette = info->pseudo_palette; | |
502 | info->pseudo_palette = palette; | |
503 | } | |
504 | ||
505 | if (fb_logo.depth <= 4) { | |
506 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
507 | GFP_KERNEL); | |
508 | if (logo_new == NULL) { | |
509 | kfree(palette); | |
510 | if (saved_pseudo_palette) | |
511 | info->pseudo_palette = saved_pseudo_palette; | |
512 | return 0; | |
513 | } | |
514 | image.data = logo_new; | |
515 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
516 | } | |
517 | ||
9c44e5f6 AD |
518 | image.dx = 0; |
519 | image.dy = 0; | |
1da177e4 LT |
520 | image.width = fb_logo.logo->width; |
521 | image.height = fb_logo.logo->height; | |
1da177e4 | 522 | |
9c44e5f6 AD |
523 | if (rotate) { |
524 | logo_rotate = kmalloc(fb_logo.logo->width * | |
525 | fb_logo.logo->height, GFP_KERNEL); | |
526 | if (logo_rotate) | |
527 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 528 | } |
9c44e5f6 | 529 | |
448d4797 | 530 | fb_do_show_logo(info, &image, rotate, num_online_cpus()); |
9c44e5f6 | 531 | |
1da177e4 LT |
532 | kfree(palette); |
533 | if (saved_pseudo_palette != NULL) | |
534 | info->pseudo_palette = saved_pseudo_palette; | |
535 | kfree(logo_new); | |
9c44e5f6 | 536 | kfree(logo_rotate); |
1da177e4 LT |
537 | return fb_logo.logo->height; |
538 | } | |
539 | #else | |
9c44e5f6 AD |
540 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
541 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
542 | #endif /* CONFIG_LOGO */ |
543 | ||
544 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
545 | int len, int *eof, void *private) | |
546 | { | |
547 | struct fb_info **fi; | |
548 | int clen; | |
549 | ||
550 | clen = 0; | |
a09fd48f GU |
551 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && clen < 4000; |
552 | fi++) | |
1da177e4 LT |
553 | if (*fi) |
554 | clen += sprintf(buf + clen, "%d %s\n", | |
555 | (*fi)->node, | |
556 | (*fi)->fix.id); | |
557 | *start = buf + offset; | |
558 | if (clen > offset) | |
559 | clen -= offset; | |
560 | else | |
561 | clen = 0; | |
562 | return clen < len ? clen : len; | |
563 | } | |
564 | ||
565 | static ssize_t | |
566 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
567 | { | |
568 | unsigned long p = *ppos; | |
ad9a824e | 569 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
570 | int fbidx = iminor(inode); |
571 | struct fb_info *info = registered_fb[fbidx]; | |
572 | u32 *buffer, *dst; | |
573 | u32 __iomem *src; | |
574 | int c, i, cnt = 0, err = 0; | |
575 | unsigned long total_size; | |
576 | ||
577 | if (!info || ! info->screen_base) | |
578 | return -ENODEV; | |
579 | ||
580 | if (info->state != FBINFO_STATE_RUNNING) | |
581 | return -EPERM; | |
582 | ||
583 | if (info->fbops->fb_read) | |
3f9b0880 | 584 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
585 | |
586 | total_size = info->screen_size; | |
0a484a3a | 587 | |
1da177e4 LT |
588 | if (total_size == 0) |
589 | total_size = info->fix.smem_len; | |
590 | ||
591 | if (p >= total_size) | |
0a484a3a AD |
592 | return 0; |
593 | ||
1da177e4 | 594 | if (count >= total_size) |
0a484a3a AD |
595 | count = total_size; |
596 | ||
1da177e4 LT |
597 | if (count + p > total_size) |
598 | count = total_size - p; | |
599 | ||
1da177e4 LT |
600 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
601 | GFP_KERNEL); | |
602 | if (!buffer) | |
603 | return -ENOMEM; | |
604 | ||
605 | src = (u32 __iomem *) (info->screen_base + p); | |
606 | ||
607 | if (info->fbops->fb_sync) | |
608 | info->fbops->fb_sync(info); | |
609 | ||
610 | while (count) { | |
611 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
612 | dst = buffer; | |
613 | for (i = c >> 2; i--; ) | |
614 | *dst++ = fb_readl(src++); | |
615 | if (c & 3) { | |
616 | u8 *dst8 = (u8 *) dst; | |
617 | u8 __iomem *src8 = (u8 __iomem *) src; | |
618 | ||
619 | for (i = c & 3; i--;) | |
620 | *dst8++ = fb_readb(src8++); | |
621 | ||
622 | src = (u32 __iomem *) src8; | |
623 | } | |
624 | ||
625 | if (copy_to_user(buf, buffer, c)) { | |
626 | err = -EFAULT; | |
627 | break; | |
628 | } | |
629 | *ppos += c; | |
630 | buf += c; | |
631 | cnt += c; | |
632 | count -= c; | |
633 | } | |
634 | ||
635 | kfree(buffer); | |
0a484a3a | 636 | |
1da177e4 LT |
637 | return (err) ? err : cnt; |
638 | } | |
639 | ||
640 | static ssize_t | |
641 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
642 | { | |
643 | unsigned long p = *ppos; | |
ad9a824e | 644 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
645 | int fbidx = iminor(inode); |
646 | struct fb_info *info = registered_fb[fbidx]; | |
647 | u32 *buffer, *src; | |
648 | u32 __iomem *dst; | |
0a484a3a | 649 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
650 | unsigned long total_size; |
651 | ||
652 | if (!info || !info->screen_base) | |
653 | return -ENODEV; | |
654 | ||
655 | if (info->state != FBINFO_STATE_RUNNING) | |
656 | return -EPERM; | |
657 | ||
658 | if (info->fbops->fb_write) | |
3f9b0880 | 659 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
660 | |
661 | total_size = info->screen_size; | |
0a484a3a | 662 | |
1da177e4 LT |
663 | if (total_size == 0) |
664 | total_size = info->fix.smem_len; | |
665 | ||
666 | if (p > total_size) | |
6a2a8866 | 667 | return -EFBIG; |
0a484a3a | 668 | |
6a2a8866 AD |
669 | if (count > total_size) { |
670 | err = -EFBIG; | |
0a484a3a | 671 | count = total_size; |
6a2a8866 AD |
672 | } |
673 | ||
674 | if (count + p > total_size) { | |
675 | if (!err) | |
676 | err = -ENOSPC; | |
0a484a3a | 677 | |
0a484a3a | 678 | count = total_size - p; |
6a2a8866 | 679 | } |
0a484a3a | 680 | |
1da177e4 LT |
681 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
682 | GFP_KERNEL); | |
683 | if (!buffer) | |
684 | return -ENOMEM; | |
685 | ||
686 | dst = (u32 __iomem *) (info->screen_base + p); | |
687 | ||
688 | if (info->fbops->fb_sync) | |
689 | info->fbops->fb_sync(info); | |
690 | ||
691 | while (count) { | |
692 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
693 | src = buffer; | |
0a484a3a | 694 | |
1da177e4 LT |
695 | if (copy_from_user(src, buf, c)) { |
696 | err = -EFAULT; | |
697 | break; | |
698 | } | |
0a484a3a | 699 | |
1da177e4 LT |
700 | for (i = c >> 2; i--; ) |
701 | fb_writel(*src++, dst++); | |
0a484a3a | 702 | |
1da177e4 LT |
703 | if (c & 3) { |
704 | u8 *src8 = (u8 *) src; | |
705 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
706 | ||
707 | for (i = c & 3; i--; ) | |
708 | fb_writeb(*src8++, dst8++); | |
709 | ||
710 | dst = (u32 __iomem *) dst8; | |
711 | } | |
0a484a3a | 712 | |
1da177e4 LT |
713 | *ppos += c; |
714 | buf += c; | |
715 | cnt += c; | |
716 | count -= c; | |
717 | } | |
0a484a3a | 718 | |
1da177e4 LT |
719 | kfree(buffer); |
720 | ||
6a2a8866 | 721 | return (cnt) ? cnt : err; |
1da177e4 LT |
722 | } |
723 | ||
724 | #ifdef CONFIG_KMOD | |
725 | static void try_to_load(int fb) | |
726 | { | |
727 | request_module("fb%d", fb); | |
728 | } | |
729 | #endif /* CONFIG_KMOD */ | |
730 | ||
731 | int | |
732 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
733 | { | |
1207069f | 734 | struct fb_fix_screeninfo *fix = &info->fix; |
1da177e4 LT |
735 | int xoffset = var->xoffset; |
736 | int yoffset = var->yoffset; | |
1207069f AD |
737 | int err = 0, yres = info->var.yres; |
738 | ||
739 | if (var->yoffset > 0) { | |
740 | if (var->vmode & FB_VMODE_YWRAP) { | |
741 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
742 | err = -EINVAL; | |
743 | else | |
744 | yres = 0; | |
745 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
746 | err = -EINVAL; | |
747 | } | |
748 | ||
749 | if (var->xoffset > 0 && (!fix->xpanstep || | |
750 | (var->xoffset % fix->xpanstep))) | |
751 | err = -EINVAL; | |
752 | ||
753 | if (err || !info->fbops->fb_pan_display || xoffset < 0 || | |
754 | yoffset < 0 || var->yoffset + yres > info->var.yres_virtual || | |
755 | var->xoffset + info->var.xres > info->var.xres_virtual) | |
756 | return -EINVAL; | |
1da177e4 | 757 | |
1da177e4 LT |
758 | if ((err = info->fbops->fb_pan_display(var, info))) |
759 | return err; | |
760 | info->var.xoffset = var->xoffset; | |
761 | info->var.yoffset = var->yoffset; | |
762 | if (var->vmode & FB_VMODE_YWRAP) | |
763 | info->var.vmode |= FB_VMODE_YWRAP; | |
764 | else | |
765 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
766 | return 0; | |
767 | } | |
768 | ||
38a3dc51 AD |
769 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
770 | u32 activate) | |
771 | { | |
772 | struct fb_event event; | |
773 | struct fb_blit_caps caps, fbcaps; | |
774 | int err = 0; | |
775 | ||
776 | memset(&caps, 0, sizeof(caps)); | |
777 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
778 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
779 | event.info = info; | |
780 | event.data = ∩︀ | |
781 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
782 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
783 | ||
784 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
785 | ((fbcaps.y ^ caps.y) & caps.y) || | |
786 | (fbcaps.len < caps.len)) | |
787 | err = -EINVAL; | |
788 | ||
789 | return err; | |
790 | } | |
791 | ||
1da177e4 LT |
792 | int |
793 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
794 | { | |
b1e7223f AD |
795 | int flags = info->flags; |
796 | int ret = 0; | |
1da177e4 LT |
797 | |
798 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
799 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
800 | |
801 | fb_var_to_videomode(&mode1, var); | |
802 | fb_var_to_videomode(&mode2, &info->var); | |
803 | /* make sure we don't delete the videomode of current var */ | |
804 | ret = fb_mode_is_equal(&mode1, &mode2); | |
805 | ||
806 | if (!ret) { | |
807 | struct fb_event event; | |
808 | ||
809 | event.info = info; | |
810 | event.data = &mode1; | |
256154fb | 811 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
812 | } |
813 | ||
814 | if (!ret) | |
815 | fb_delete_videomode(&mode1, &info->modelist); | |
816 | ||
b1e7223f AD |
817 | |
818 | ret = (ret) ? -EINVAL : 0; | |
819 | goto done; | |
1da177e4 LT |
820 | } |
821 | ||
822 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
823 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
824 | u32 activate = var->activate; |
825 | ||
1da177e4 LT |
826 | if (!info->fbops->fb_check_var) { |
827 | *var = info->var; | |
b1e7223f | 828 | goto done; |
1da177e4 LT |
829 | } |
830 | ||
b1e7223f AD |
831 | ret = info->fbops->fb_check_var(var, info); |
832 | ||
833 | if (ret) | |
834 | goto done; | |
1da177e4 LT |
835 | |
836 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
837 | struct fb_videomode mode; | |
1da177e4 | 838 | |
38a3dc51 | 839 | if (info->fbops->fb_get_caps) { |
b1e7223f | 840 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 841 | |
b1e7223f | 842 | if (ret) |
38a3dc51 AD |
843 | goto done; |
844 | } | |
845 | ||
1da177e4 | 846 | info->var = *var; |
38a3dc51 | 847 | |
1da177e4 LT |
848 | if (info->fbops->fb_set_par) |
849 | info->fbops->fb_set_par(info); | |
850 | ||
851 | fb_pan_display(info, &info->var); | |
1da177e4 | 852 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
853 | fb_var_to_videomode(&mode, &info->var); |
854 | ||
855 | if (info->modelist.prev && info->modelist.next && | |
856 | !list_empty(&info->modelist)) | |
b1e7223f | 857 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 858 | |
b1e7223f | 859 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 860 | struct fb_event event; |
4941cb7a | 861 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
862 | FB_EVENT_MODE_CHANGE_ALL : |
863 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
864 | |
865 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
866 | event.info = info; | |
256154fb | 867 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
868 | } |
869 | } | |
870 | } | |
38a3dc51 AD |
871 | |
872 | done: | |
b1e7223f | 873 | return ret; |
1da177e4 LT |
874 | } |
875 | ||
876 | int | |
877 | fb_blank(struct fb_info *info, int blank) | |
878 | { | |
879 | int ret = -EINVAL; | |
880 | ||
881 | if (blank > FB_BLANK_POWERDOWN) | |
882 | blank = FB_BLANK_POWERDOWN; | |
883 | ||
884 | if (info->fbops->fb_blank) | |
885 | ret = info->fbops->fb_blank(blank, info); | |
886 | ||
887 | if (!ret) { | |
888 | struct fb_event event; | |
889 | ||
890 | event.info = info; | |
891 | event.data = ␣ | |
256154fb | 892 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
893 | } |
894 | ||
895 | return ret; | |
896 | } | |
897 | ||
898 | static int | |
899 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
900 | unsigned long arg) | |
901 | { | |
902 | int fbidx = iminor(inode); | |
903 | struct fb_info *info = registered_fb[fbidx]; | |
904 | struct fb_ops *fb = info->fbops; | |
905 | struct fb_var_screeninfo var; | |
906 | struct fb_fix_screeninfo fix; | |
907 | struct fb_con2fbmap con2fb; | |
908 | struct fb_cmap_user cmap; | |
909 | struct fb_event event; | |
910 | void __user *argp = (void __user *)arg; | |
911 | int i; | |
912 | ||
913 | if (!fb) | |
914 | return -ENODEV; | |
915 | switch (cmd) { | |
916 | case FBIOGET_VSCREENINFO: | |
917 | return copy_to_user(argp, &info->var, | |
918 | sizeof(var)) ? -EFAULT : 0; | |
919 | case FBIOPUT_VSCREENINFO: | |
920 | if (copy_from_user(&var, argp, sizeof(var))) | |
921 | return -EFAULT; | |
922 | acquire_console_sem(); | |
923 | info->flags |= FBINFO_MISC_USEREVENT; | |
924 | i = fb_set_var(info, &var); | |
925 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
926 | release_console_sem(); | |
927 | if (i) return i; | |
928 | if (copy_to_user(argp, &var, sizeof(var))) | |
929 | return -EFAULT; | |
930 | return 0; | |
931 | case FBIOGET_FSCREENINFO: | |
932 | return copy_to_user(argp, &info->fix, | |
933 | sizeof(fix)) ? -EFAULT : 0; | |
934 | case FBIOPUTCMAP: | |
935 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
936 | return -EFAULT; | |
937 | return (fb_set_user_cmap(&cmap, info)); | |
938 | case FBIOGETCMAP: | |
939 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
940 | return -EFAULT; | |
941 | return fb_cmap_to_user(&info->cmap, &cmap); | |
942 | case FBIOPAN_DISPLAY: | |
943 | if (copy_from_user(&var, argp, sizeof(var))) | |
944 | return -EFAULT; | |
945 | acquire_console_sem(); | |
946 | i = fb_pan_display(info, &var); | |
947 | release_console_sem(); | |
948 | if (i) | |
949 | return i; | |
950 | if (copy_to_user(argp, &var, sizeof(var))) | |
951 | return -EFAULT; | |
952 | return 0; | |
953 | case FBIO_CURSOR: | |
954 | return -EINVAL; | |
955 | case FBIOGET_CON2FBMAP: | |
956 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
957 | return -EFAULT; | |
958 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
959 | return -EINVAL; | |
960 | con2fb.framebuffer = -1; | |
961 | event.info = info; | |
962 | event.data = &con2fb; | |
256154fb | 963 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1da177e4 LT |
964 | return copy_to_user(argp, &con2fb, |
965 | sizeof(con2fb)) ? -EFAULT : 0; | |
966 | case FBIOPUT_CON2FBMAP: | |
967 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
968 | return - EFAULT; | |
969 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
970 | return -EINVAL; | |
971 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
972 | return -EINVAL; | |
973 | #ifdef CONFIG_KMOD | |
974 | if (!registered_fb[con2fb.framebuffer]) | |
975 | try_to_load(con2fb.framebuffer); | |
976 | #endif /* CONFIG_KMOD */ | |
977 | if (!registered_fb[con2fb.framebuffer]) | |
978 | return -EINVAL; | |
979 | event.info = info; | |
980 | event.data = &con2fb; | |
256154fb AD |
981 | return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
982 | &event); | |
1da177e4 LT |
983 | case FBIOBLANK: |
984 | acquire_console_sem(); | |
985 | info->flags |= FBINFO_MISC_USEREVENT; | |
986 | i = fb_blank(info, arg); | |
987 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
988 | release_console_sem(); | |
989 | return i; | |
990 | default: | |
991 | if (fb->fb_ioctl == NULL) | |
992 | return -EINVAL; | |
67a6680d | 993 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
994 | } |
995 | } | |
996 | ||
997 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
998 | struct fb_fix_screeninfo32 { |
999 | char id[16]; | |
1000 | compat_caddr_t smem_start; | |
1001 | u32 smem_len; | |
1002 | u32 type; | |
1003 | u32 type_aux; | |
1004 | u32 visual; | |
1005 | u16 xpanstep; | |
1006 | u16 ypanstep; | |
1007 | u16 ywrapstep; | |
1008 | u32 line_length; | |
1009 | compat_caddr_t mmio_start; | |
1010 | u32 mmio_len; | |
1011 | u32 accel; | |
1012 | u16 reserved[3]; | |
1013 | }; | |
1014 | ||
1015 | struct fb_cmap32 { | |
1016 | u32 start; | |
1017 | u32 len; | |
1018 | compat_caddr_t red; | |
1019 | compat_caddr_t green; | |
1020 | compat_caddr_t blue; | |
1021 | compat_caddr_t transp; | |
1022 | }; | |
1023 | ||
1024 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
1025 | unsigned int cmd, unsigned long arg) | |
1026 | { | |
1027 | struct fb_cmap_user __user *cmap; | |
1028 | struct fb_cmap32 __user *cmap32; | |
1029 | __u32 data; | |
1030 | int err; | |
1031 | ||
1032 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1033 | cmap32 = compat_ptr(arg); | |
1034 | ||
1035 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1036 | return -EFAULT; | |
1037 | ||
1038 | if (get_user(data, &cmap32->red) || | |
1039 | put_user(compat_ptr(data), &cmap->red) || | |
1040 | get_user(data, &cmap32->green) || | |
1041 | put_user(compat_ptr(data), &cmap->green) || | |
1042 | get_user(data, &cmap32->blue) || | |
1043 | put_user(compat_ptr(data), &cmap->blue) || | |
1044 | get_user(data, &cmap32->transp) || | |
1045 | put_user(compat_ptr(data), &cmap->transp)) | |
1046 | return -EFAULT; | |
1047 | ||
1048 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1049 | ||
1050 | if (!err) { | |
1051 | if (copy_in_user(&cmap32->start, | |
1052 | &cmap->start, | |
1053 | 2 * sizeof(__u32))) | |
1054 | err = -EFAULT; | |
1055 | } | |
1056 | return err; | |
1057 | } | |
1058 | ||
1059 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1060 | struct fb_fix_screeninfo32 __user *fix32) | |
1061 | { | |
1062 | __u32 data; | |
1063 | int err; | |
1064 | ||
1065 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1066 | ||
1067 | data = (__u32) (unsigned long) fix->smem_start; | |
1068 | err |= put_user(data, &fix32->smem_start); | |
1069 | ||
1070 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1071 | err |= put_user(fix->type, &fix32->type); | |
1072 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1073 | err |= put_user(fix->visual, &fix32->visual); | |
1074 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1075 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1076 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1077 | err |= put_user(fix->line_length, &fix32->line_length); | |
1078 | ||
1079 | data = (__u32) (unsigned long) fix->mmio_start; | |
1080 | err |= put_user(data, &fix32->mmio_start); | |
1081 | ||
1082 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1083 | err |= put_user(fix->accel, &fix32->accel); | |
1084 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1085 | sizeof(fix->reserved)); | |
1086 | ||
1087 | return err; | |
1088 | } | |
1089 | ||
1090 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1091 | unsigned int cmd, unsigned long arg) | |
1092 | { | |
1093 | mm_segment_t old_fs; | |
1094 | struct fb_fix_screeninfo fix; | |
1095 | struct fb_fix_screeninfo32 __user *fix32; | |
1096 | int err; | |
1097 | ||
1098 | fix32 = compat_ptr(arg); | |
1099 | ||
1100 | old_fs = get_fs(); | |
1101 | set_fs(KERNEL_DS); | |
1102 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1103 | set_fs(old_fs); | |
1104 | ||
1105 | if (!err) | |
1106 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1107 | ||
1108 | return err; | |
1109 | } | |
1110 | ||
1da177e4 LT |
1111 | static long |
1112 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1113 | { | |
ad9a824e | 1114 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1115 | int fbidx = iminor(inode); |
1da177e4 LT |
1116 | struct fb_info *info = registered_fb[fbidx]; |
1117 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1118 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1119 | |
1da177e4 | 1120 | lock_kernel(); |
c7f82d9c AB |
1121 | switch(cmd) { |
1122 | case FBIOGET_VSCREENINFO: | |
1123 | case FBIOPUT_VSCREENINFO: | |
1124 | case FBIOPAN_DISPLAY: | |
1125 | case FBIOGET_CON2FBMAP: | |
1126 | case FBIOPUT_CON2FBMAP: | |
1127 | arg = (unsigned long) compat_ptr(arg); | |
1128 | case FBIOBLANK: | |
1129 | ret = fb_ioctl(inode, file, cmd, arg); | |
1130 | break; | |
1131 | ||
1132 | case FBIOGET_FSCREENINFO: | |
1133 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1134 | break; | |
1135 | ||
1136 | case FBIOGETCMAP: | |
1137 | case FBIOPUTCMAP: | |
1138 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1139 | break; | |
1140 | ||
1141 | default: | |
1142 | if (fb->fb_compat_ioctl) | |
67a6680d | 1143 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1144 | break; |
1145 | } | |
1da177e4 LT |
1146 | unlock_kernel(); |
1147 | return ret; | |
1148 | } | |
1149 | #endif | |
1150 | ||
10eb2659 | 1151 | static int |
1da177e4 LT |
1152 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1153 | { | |
ad9a824e | 1154 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1155 | struct fb_info *info = registered_fb[fbidx]; |
1156 | struct fb_ops *fb = info->fbops; | |
1157 | unsigned long off; | |
1da177e4 LT |
1158 | unsigned long start; |
1159 | u32 len; | |
1da177e4 LT |
1160 | |
1161 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1162 | return -EINVAL; | |
1163 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1164 | if (!fb) | |
1165 | return -ENODEV; | |
1166 | if (fb->fb_mmap) { | |
1167 | int res; | |
1168 | lock_kernel(); | |
216d526c | 1169 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1170 | unlock_kernel(); |
1171 | return res; | |
1172 | } | |
1173 | ||
1da177e4 LT |
1174 | lock_kernel(); |
1175 | ||
1176 | /* frame buffer memory */ | |
1177 | start = info->fix.smem_start; | |
1178 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1179 | if (off >= len) { | |
1180 | /* memory mapped io */ | |
1181 | off -= len; | |
1182 | if (info->var.accel_flags) { | |
1183 | unlock_kernel(); | |
1184 | return -EINVAL; | |
1185 | } | |
1186 | start = info->fix.mmio_start; | |
1187 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1188 | } | |
1189 | unlock_kernel(); | |
1190 | start &= PAGE_MASK; | |
1191 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1192 | return -EINVAL; | |
1193 | off += start; | |
1194 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1195 | /* This is an IO map - tell maydump to skip this VMA */ | |
1196 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1197 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1198 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1199 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1200 | return -EAGAIN; | |
1da177e4 | 1201 | return 0; |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | static int | |
1205 | fb_open(struct inode *inode, struct file *file) | |
1206 | { | |
1207 | int fbidx = iminor(inode); | |
1208 | struct fb_info *info; | |
1209 | int res = 0; | |
1210 | ||
1211 | if (fbidx >= FB_MAX) | |
1212 | return -ENODEV; | |
1213 | #ifdef CONFIG_KMOD | |
1214 | if (!(info = registered_fb[fbidx])) | |
1215 | try_to_load(fbidx); | |
1216 | #endif /* CONFIG_KMOD */ | |
1217 | if (!(info = registered_fb[fbidx])) | |
1218 | return -ENODEV; | |
1219 | if (!try_module_get(info->fbops->owner)) | |
1220 | return -ENODEV; | |
cae8a12f | 1221 | file->private_data = info; |
1da177e4 LT |
1222 | if (info->fbops->fb_open) { |
1223 | res = info->fbops->fb_open(info,1); | |
1224 | if (res) | |
1225 | module_put(info->fbops->owner); | |
1226 | } | |
1227 | return res; | |
1228 | } | |
1229 | ||
1230 | static int | |
1231 | fb_release(struct inode *inode, struct file *file) | |
1232 | { | |
cae8a12f | 1233 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1234 | |
1235 | lock_kernel(); | |
1da177e4 LT |
1236 | if (info->fbops->fb_release) |
1237 | info->fbops->fb_release(info,1); | |
1238 | module_put(info->fbops->owner); | |
1239 | unlock_kernel(); | |
1240 | return 0; | |
1241 | } | |
1242 | ||
0128beee | 1243 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1244 | .owner = THIS_MODULE, |
1245 | .read = fb_read, | |
1246 | .write = fb_write, | |
1247 | .ioctl = fb_ioctl, | |
1248 | #ifdef CONFIG_COMPAT | |
1249 | .compat_ioctl = fb_compat_ioctl, | |
1250 | #endif | |
1251 | .mmap = fb_mmap, | |
1252 | .open = fb_open, | |
1253 | .release = fb_release, | |
1254 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1255 | .get_unmapped_area = get_fb_unmapped_area, | |
1256 | #endif | |
5e841b88 PM |
1257 | #ifdef CONFIG_FB_DEFERRED_IO |
1258 | .fsync = fb_deferred_io_fsync, | |
1259 | #endif | |
1da177e4 LT |
1260 | }; |
1261 | ||
9a179176 AD |
1262 | struct class *fb_class; |
1263 | EXPORT_SYMBOL(fb_class); | |
1da177e4 LT |
1264 | /** |
1265 | * register_framebuffer - registers a frame buffer device | |
1266 | * @fb_info: frame buffer info structure | |
1267 | * | |
1268 | * Registers a frame buffer device @fb_info. | |
1269 | * | |
1270 | * Returns negative errno on error, or zero for success. | |
1271 | * | |
1272 | */ | |
1273 | ||
1274 | int | |
1275 | register_framebuffer(struct fb_info *fb_info) | |
1276 | { | |
1277 | int i; | |
1278 | struct fb_event event; | |
96fe6a21 | 1279 | struct fb_videomode mode; |
1da177e4 LT |
1280 | |
1281 | if (num_registered_fb == FB_MAX) | |
1282 | return -ENXIO; | |
1283 | num_registered_fb++; | |
1284 | for (i = 0 ; i < FB_MAX; i++) | |
1285 | if (!registered_fb[i]) | |
1286 | break; | |
1287 | fb_info->node = i; | |
1288 | ||
78cde088 GKH |
1289 | fb_info->dev = device_create(fb_class, fb_info->device, |
1290 | MKDEV(FB_MAJOR, i), "fb%d", i); | |
1291 | if (IS_ERR(fb_info->dev)) { | |
1da177e4 | 1292 | /* Not fatal */ |
78cde088 GKH |
1293 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1294 | fb_info->dev = NULL; | |
1da177e4 | 1295 | } else |
78cde088 | 1296 | fb_init_device(fb_info); |
1da177e4 LT |
1297 | |
1298 | if (fb_info->pixmap.addr == NULL) { | |
1299 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1300 | if (fb_info->pixmap.addr) { | |
1301 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1302 | fb_info->pixmap.buf_align = 1; | |
1303 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1304 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1305 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1306 | } | |
1307 | } | |
1308 | fb_info->pixmap.offset = 0; | |
1309 | ||
bf26ad72 AD |
1310 | if (!fb_info->pixmap.blit_x) |
1311 | fb_info->pixmap.blit_x = ~(u32)0; | |
1312 | ||
1313 | if (!fb_info->pixmap.blit_y) | |
1314 | fb_info->pixmap.blit_y = ~(u32)0; | |
1315 | ||
96fe6a21 | 1316 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1317 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1318 | |
96fe6a21 AD |
1319 | fb_var_to_videomode(&mode, &fb_info->var); |
1320 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1321 | registered_fb[i] = fb_info; |
1322 | ||
1da177e4 | 1323 | event.info = fb_info; |
256154fb | 1324 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1325 | return 0; |
1326 | } | |
1327 | ||
1328 | ||
1329 | /** | |
1330 | * unregister_framebuffer - releases a frame buffer device | |
1331 | * @fb_info: frame buffer info structure | |
1332 | * | |
1333 | * Unregisters a frame buffer device @fb_info. | |
1334 | * | |
1335 | * Returns negative errno on error, or zero for success. | |
1336 | * | |
1337 | */ | |
1338 | ||
1339 | int | |
1340 | unregister_framebuffer(struct fb_info *fb_info) | |
1341 | { | |
e614b18d | 1342 | struct fb_event event; |
1da177e4 LT |
1343 | int i; |
1344 | ||
1345 | i = fb_info->node; | |
1346 | if (!registered_fb[i]) | |
1347 | return -EINVAL; | |
1da177e4 | 1348 | |
e614b18d AD |
1349 | if (fb_info->pixmap.addr && |
1350 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1351 | kfree(fb_info->pixmap.addr); |
1352 | fb_destroy_modelist(&fb_info->modelist); | |
1353 | registered_fb[i]=NULL; | |
1354 | num_registered_fb--; | |
78cde088 GKH |
1355 | fb_cleanup_device(fb_info); |
1356 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1357 | event.info = fb_info; |
256154fb | 1358 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
1da177e4 LT |
1359 | return 0; |
1360 | } | |
1361 | ||
1da177e4 LT |
1362 | /** |
1363 | * fb_set_suspend - low level driver signals suspend | |
1364 | * @info: framebuffer affected | |
1365 | * @state: 0 = resuming, !=0 = suspending | |
1366 | * | |
1367 | * This is meant to be used by low level drivers to | |
1368 | * signal suspend/resume to the core & clients. | |
1369 | * It must be called with the console semaphore held | |
1370 | */ | |
1371 | void fb_set_suspend(struct fb_info *info, int state) | |
1372 | { | |
1373 | struct fb_event event; | |
1374 | ||
1375 | event.info = info; | |
1376 | if (state) { | |
256154fb | 1377 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1378 | info->state = FBINFO_STATE_SUSPENDED; |
1379 | } else { | |
1380 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1381 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1382 | } |
1383 | } | |
1384 | ||
1385 | /** | |
1386 | * fbmem_init - init frame buffer subsystem | |
1387 | * | |
1388 | * Initialize the frame buffer subsystem. | |
1389 | * | |
1390 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1391 | * | |
1392 | */ | |
1393 | ||
1394 | static int __init | |
1395 | fbmem_init(void) | |
1396 | { | |
1397 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1398 | ||
1da177e4 LT |
1399 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1400 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1401 | ||
56b22935 | 1402 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1403 | if (IS_ERR(fb_class)) { |
1404 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1405 | fb_class = NULL; | |
1406 | } | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | #ifdef MODULE | |
1411 | module_init(fbmem_init); | |
1412 | static void __exit | |
1413 | fbmem_exit(void) | |
1414 | { | |
56b22935 | 1415 | class_destroy(fb_class); |
5a340cce | 1416 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | module_exit(fbmem_exit); | |
1420 | MODULE_LICENSE("GPL"); | |
1421 | MODULE_DESCRIPTION("Framebuffer base"); | |
1422 | #else | |
1423 | subsys_initcall(fbmem_init); | |
1424 | #endif | |
1425 | ||
1426 | int fb_new_modelist(struct fb_info *info) | |
1427 | { | |
1428 | struct fb_event event; | |
1429 | struct fb_var_screeninfo var = info->var; | |
1430 | struct list_head *pos, *n; | |
1431 | struct fb_modelist *modelist; | |
1432 | struct fb_videomode *m, mode; | |
1433 | int err = 1; | |
1434 | ||
1435 | list_for_each_safe(pos, n, &info->modelist) { | |
1436 | modelist = list_entry(pos, struct fb_modelist, list); | |
1437 | m = &modelist->mode; | |
1438 | fb_videomode_to_var(&var, m); | |
1439 | var.activate = FB_ACTIVATE_TEST; | |
1440 | err = fb_set_var(info, &var); | |
1441 | fb_var_to_videomode(&mode, &var); | |
1442 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1443 | list_del(pos); | |
1444 | kfree(pos); | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | err = 1; | |
1449 | ||
1450 | if (!list_empty(&info->modelist)) { | |
1451 | event.info = info; | |
256154fb | 1452 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1453 | } |
1454 | ||
1455 | return err; | |
1456 | } | |
1457 | ||
0128beee HD |
1458 | static char *video_options[FB_MAX] __read_mostly; |
1459 | static int ofonly __read_mostly; | |
1da177e4 | 1460 | |
4dc3b16b PP |
1461 | extern const char *global_mode_option; |
1462 | ||
1da177e4 LT |
1463 | /** |
1464 | * fb_get_options - get kernel boot parameters | |
1465 | * @name: framebuffer name as it would appear in | |
1466 | * the boot parameter line | |
1467 | * (video=<name>:<options>) | |
1468 | * @option: the option will be stored here | |
1469 | * | |
1470 | * NOTE: Needed to maintain backwards compatibility | |
1471 | */ | |
1472 | int fb_get_options(char *name, char **option) | |
1473 | { | |
1474 | char *opt, *options = NULL; | |
1475 | int opt_len, retval = 0; | |
1476 | int name_len = strlen(name), i; | |
1477 | ||
1478 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1479 | retval = 1; | |
1480 | ||
1481 | if (name_len && !retval) { | |
1482 | for (i = 0; i < FB_MAX; i++) { | |
1483 | if (video_options[i] == NULL) | |
1484 | continue; | |
1485 | opt_len = strlen(video_options[i]); | |
1486 | if (!opt_len) | |
1487 | continue; | |
1488 | opt = video_options[i]; | |
1489 | if (!strncmp(name, opt, name_len) && | |
1490 | opt[name_len] == ':') | |
1491 | options = opt + name_len + 1; | |
1492 | } | |
1493 | } | |
1494 | if (options && !strncmp(options, "off", 3)) | |
1495 | retval = 1; | |
1496 | ||
1497 | if (option) | |
1498 | *option = options; | |
1499 | ||
1500 | return retval; | |
1501 | } | |
1502 | ||
bc6d7fdf | 1503 | #ifndef MODULE |
1da177e4 LT |
1504 | /** |
1505 | * video_setup - process command line options | |
1506 | * @options: string of options | |
1507 | * | |
1508 | * Process command line options for frame buffer subsystem. | |
1509 | * | |
1510 | * NOTE: This function is a __setup and __init function. | |
1511 | * It only stores the options. Drivers have to call | |
1512 | * fb_get_options() as necessary. | |
1513 | * | |
1514 | * Returns zero. | |
1515 | * | |
1516 | */ | |
75c96f85 | 1517 | static int __init video_setup(char *options) |
1da177e4 LT |
1518 | { |
1519 | int i, global = 0; | |
1520 | ||
1521 | if (!options || !*options) | |
1522 | global = 1; | |
1523 | ||
1524 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1525 | ofonly = 1; | |
1526 | global = 1; | |
1527 | } | |
1528 | ||
1529 | if (!global && !strstr(options, "fb:")) { | |
1530 | global_mode_option = options; | |
1531 | global = 1; | |
1532 | } | |
1533 | ||
1534 | if (!global) { | |
1535 | for (i = 0; i < FB_MAX; i++) { | |
1536 | if (video_options[i] == NULL) { | |
1537 | video_options[i] = options; | |
1538 | break; | |
1539 | } | |
1540 | ||
1541 | } | |
1542 | } | |
1543 | ||
9b41046c | 1544 | return 1; |
1da177e4 LT |
1545 | } |
1546 | __setup("video=", video_setup); | |
bc6d7fdf | 1547 | #endif |
1da177e4 LT |
1548 | |
1549 | /* | |
1550 | * Visible symbols for modules | |
1551 | */ | |
1552 | ||
1553 | EXPORT_SYMBOL(register_framebuffer); | |
1554 | EXPORT_SYMBOL(unregister_framebuffer); | |
1555 | EXPORT_SYMBOL(num_registered_fb); | |
1556 | EXPORT_SYMBOL(registered_fb); | |
1557 | EXPORT_SYMBOL(fb_prepare_logo); | |
1558 | EXPORT_SYMBOL(fb_show_logo); | |
1559 | EXPORT_SYMBOL(fb_set_var); | |
1560 | EXPORT_SYMBOL(fb_blank); | |
1561 | EXPORT_SYMBOL(fb_pan_display); | |
1562 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1563 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1564 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1565 | |
1566 | MODULE_LICENSE("GPL"); |