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 | 30 | #include <linux/console.h> |
1da177e4 | 31 | #include <linux/kmod.h> |
1da177e4 | 32 | #include <linux/err.h> |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/efi.h> | |
10eb2659 | 35 | #include <linux/fb.h> |
1da177e4 | 36 | |
10eb2659 | 37 | #include <asm/fb.h> |
1da177e4 | 38 | |
1da177e4 LT |
39 | |
40 | /* | |
41 | * Frame buffer device initialization and setup routines | |
42 | */ | |
43 | ||
44 | #define FBPIXMAPSIZE (1024 * 8) | |
45 | ||
0128beee HD |
46 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
47 | int num_registered_fb __read_mostly; | |
1da177e4 LT |
48 | |
49 | /* | |
50 | * Helpers | |
51 | */ | |
52 | ||
b8c90945 AD |
53 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
54 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 55 | { |
b8c90945 AD |
56 | int depth = 0; |
57 | ||
58 | if (fix->visual == FB_VISUAL_MONO01 || | |
59 | fix->visual == FB_VISUAL_MONO10) | |
60 | depth = 1; | |
61 | else { | |
62 | if (var->green.length == var->blue.length && | |
63 | var->green.length == var->red.length && | |
64 | var->green.offset == var->blue.offset && | |
65 | var->green.offset == var->red.offset) | |
66 | depth = var->green.length; | |
67 | else | |
68 | depth = var->green.length + var->red.length + | |
69 | var->blue.length; | |
70 | } | |
71 | ||
72 | return depth; | |
1da177e4 LT |
73 | } |
74 | EXPORT_SYMBOL(fb_get_color_depth); | |
75 | ||
76 | /* | |
f5a9951c | 77 | * Data padding functions. |
1da177e4 | 78 | */ |
f1ab5dac | 79 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 80 | { |
829e79b6 | 81 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 82 | } |
f1ab5dac | 83 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 84 | |
f1ab5dac JS |
85 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
86 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
87 | { |
88 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
89 | int i, j; | |
90 | ||
91 | for (i = height; i--; ) { | |
92 | for (j = 0; j < idx; j++) { | |
93 | tmp = dst[j]; | |
94 | tmp &= mask; | |
95 | tmp |= *src >> shift_low; | |
96 | dst[j] = tmp; | |
97 | tmp = *src << shift_high; | |
98 | dst[j+1] = tmp; | |
99 | src++; | |
100 | } | |
101 | tmp = dst[idx]; | |
102 | tmp &= mask; | |
103 | tmp |= *src >> shift_low; | |
104 | dst[idx] = tmp; | |
105 | if (shift_high < mod) { | |
106 | tmp = *src << shift_high; | |
107 | dst[idx+1] = tmp; | |
108 | } | |
109 | src++; | |
110 | dst += d_pitch; | |
111 | } | |
112 | } | |
f1ab5dac | 113 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
114 | |
115 | /* | |
116 | * we need to lock this section since fb_cursor | |
117 | * may use fb_imageblit() | |
118 | */ | |
119 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
120 | { | |
121 | u32 align = buf->buf_align - 1, offset; | |
122 | char *addr = buf->addr; | |
123 | ||
124 | /* If IO mapped, we need to sync before access, no sharing of | |
125 | * the pixmap is done | |
126 | */ | |
127 | if (buf->flags & FB_PIXMAP_IO) { | |
128 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
129 | info->fbops->fb_sync(info); | |
130 | return addr; | |
131 | } | |
132 | ||
133 | /* See if we fit in the remaining pixmap space */ | |
134 | offset = buf->offset + align; | |
135 | offset &= ~align; | |
136 | if (offset + size > buf->size) { | |
137 | /* We do not fit. In order to be able to re-use the buffer, | |
138 | * we must ensure no asynchronous DMA'ing or whatever operation | |
139 | * is in progress, we sync for that. | |
140 | */ | |
141 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
142 | info->fbops->fb_sync(info); | |
143 | offset = 0; | |
144 | } | |
145 | buf->offset = offset + size; | |
146 | addr += offset; | |
147 | ||
148 | return addr; | |
149 | } | |
150 | ||
151 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
152 | |
153 | static inline unsigned safe_shift(unsigned d, int n) | |
154 | { | |
155 | return n < 0 ? d >> -n : d << n; | |
156 | } | |
157 | ||
158 | static void fb_set_logocmap(struct fb_info *info, | |
159 | const struct linux_logo *logo) | |
160 | { | |
161 | struct fb_cmap palette_cmap; | |
162 | u16 palette_green[16]; | |
163 | u16 palette_blue[16]; | |
164 | u16 palette_red[16]; | |
165 | int i, j, n; | |
166 | const unsigned char *clut = logo->clut; | |
167 | ||
168 | palette_cmap.start = 0; | |
169 | palette_cmap.len = 16; | |
170 | palette_cmap.red = palette_red; | |
171 | palette_cmap.green = palette_green; | |
172 | palette_cmap.blue = palette_blue; | |
173 | palette_cmap.transp = NULL; | |
174 | ||
175 | for (i = 0; i < logo->clutsize; i += n) { | |
176 | n = logo->clutsize - i; | |
177 | /* palette_cmap provides space for only 16 colors at once */ | |
178 | if (n > 16) | |
179 | n = 16; | |
180 | palette_cmap.start = 32 + i; | |
181 | palette_cmap.len = n; | |
182 | for (j = 0; j < n; ++j) { | |
183 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
184 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
185 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
186 | clut += 3; | |
187 | } | |
188 | fb_set_cmap(&palette_cmap, info); | |
189 | } | |
190 | } | |
191 | ||
192 | static void fb_set_logo_truepalette(struct fb_info *info, | |
193 | const struct linux_logo *logo, | |
194 | u32 *palette) | |
195 | { | |
0128beee | 196 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
197 | unsigned char redmask, greenmask, bluemask; |
198 | int redshift, greenshift, blueshift; | |
199 | int i; | |
200 | const unsigned char *clut = logo->clut; | |
201 | ||
202 | /* | |
203 | * We have to create a temporary palette since console palette is only | |
204 | * 16 colors long. | |
205 | */ | |
206 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
207 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
208 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
209 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
210 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
211 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
212 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
213 | ||
214 | for ( i = 0; i < logo->clutsize; i++) { | |
215 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
216 | safe_shift((clut[1] & greenmask), greenshift) | | |
217 | safe_shift((clut[2] & bluemask), blueshift)); | |
218 | clut += 3; | |
219 | } | |
220 | } | |
221 | ||
222 | static void fb_set_logo_directpalette(struct fb_info *info, | |
223 | const struct linux_logo *logo, | |
224 | u32 *palette) | |
225 | { | |
226 | int redshift, greenshift, blueshift; | |
227 | int i; | |
228 | ||
229 | redshift = info->var.red.offset; | |
230 | greenshift = info->var.green.offset; | |
231 | blueshift = info->var.blue.offset; | |
232 | ||
233 | for (i = 32; i < logo->clutsize; i++) | |
234 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
235 | } | |
236 | ||
237 | static void fb_set_logo(struct fb_info *info, | |
238 | const struct linux_logo *logo, u8 *dst, | |
239 | int depth) | |
240 | { | |
b8c90945 | 241 | int i, j, k; |
1da177e4 | 242 | const u8 *src = logo->data; |
b8c90945 AD |
243 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
244 | u8 fg = 1, d; | |
1da177e4 | 245 | |
1692b37c AD |
246 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
247 | case 1: | |
248 | fg = 1; | |
249 | break; | |
250 | case 2: | |
251 | fg = 3; | |
252 | break; | |
253 | default: | |
1da177e4 | 254 | fg = 7; |
1692b37c AD |
255 | break; |
256 | } | |
1da177e4 | 257 | |
b8c90945 AD |
258 | if (info->fix.visual == FB_VISUAL_MONO01 || |
259 | info->fix.visual == FB_VISUAL_MONO10) | |
260 | fg = ~((u8) (0xfff << info->var.green.length)); | |
261 | ||
1da177e4 LT |
262 | switch (depth) { |
263 | case 4: | |
264 | for (i = 0; i < logo->height; i++) | |
265 | for (j = 0; j < logo->width; src++) { | |
266 | *dst++ = *src >> 4; | |
267 | j++; | |
268 | if (j < logo->width) { | |
269 | *dst++ = *src & 0x0f; | |
270 | j++; | |
271 | } | |
272 | } | |
273 | break; | |
274 | case 1: | |
275 | for (i = 0; i < logo->height; i++) { | |
276 | for (j = 0; j < logo->width; src++) { | |
277 | d = *src ^ xor; | |
278 | for (k = 7; k >= 0; k--) { | |
279 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
280 | j++; | |
281 | } | |
282 | } | |
283 | } | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
288 | /* | |
289 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
290 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
291 | * the visual format and color depth of the framebuffer, the DAC, the | |
292 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
293 | * | |
294 | * Case 1 - linux_logo_clut224: | |
295 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
296 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
297 | * | |
298 | * For visuals that require color info from the pseudo_palette, we also construct | |
299 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
300 | * will be set. | |
301 | * | |
302 | * Case 2 - linux_logo_vga16: | |
303 | * The number of colors just matches the console colors, thus there is no need | |
304 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
305 | * each byte contains color information for two pixels (upper and lower nibble). | |
306 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
307 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
308 | * | |
309 | * Case 3 - linux_logo_mono: | |
310 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
311 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
312 | * be set to 1. | |
313 | */ | |
314 | static struct logo_data { | |
315 | int depth; | |
316 | int needs_directpalette; | |
317 | int needs_truepalette; | |
318 | int needs_cmapreset; | |
319 | const struct linux_logo *logo; | |
0128beee | 320 | } fb_logo __read_mostly; |
1da177e4 | 321 | |
9c44e5f6 AD |
322 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
323 | { | |
324 | u32 size = width * height, i; | |
325 | ||
326 | out += size - 1; | |
327 | ||
328 | for (i = size; i--; ) | |
329 | *out-- = *in++; | |
330 | } | |
331 | ||
332 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
333 | { | |
f837e6f7 | 334 | int i, j, h = height - 1; |
9c44e5f6 AD |
335 | |
336 | for (i = 0; i < height; i++) | |
337 | for (j = 0; j < width; j++) | |
f837e6f7 | 338 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
339 | } |
340 | ||
341 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
342 | { | |
343 | int i, j, w = width - 1; | |
344 | ||
345 | for (i = 0; i < height; i++) | |
346 | for (j = 0; j < width; j++) | |
347 | out[height * (w - j) + i] = *in++; | |
348 | } | |
349 | ||
350 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
351 | struct fb_image *image, int rotate) | |
352 | { | |
353 | u32 tmp; | |
354 | ||
355 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
356 | fb_rotate_logo_ud(image->data, dst, image->width, |
357 | image->height); | |
abed5d15 GU |
358 | image->dx = info->var.xres - image->width - image->dx; |
359 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 360 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
361 | fb_rotate_logo_cw(image->data, dst, image->width, |
362 | image->height); | |
9c44e5f6 AD |
363 | tmp = image->width; |
364 | image->width = image->height; | |
365 | image->height = tmp; | |
abed5d15 GU |
366 | tmp = image->dy; |
367 | image->dy = image->dx; | |
368 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 369 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
370 | fb_rotate_logo_ccw(image->data, dst, image->width, |
371 | image->height); | |
f837e6f7 AD |
372 | tmp = image->width; |
373 | image->width = image->height; | |
374 | image->height = tmp; | |
abed5d15 GU |
375 | tmp = image->dx; |
376 | image->dx = image->dy; | |
377 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
378 | } |
379 | ||
380 | image->data = dst; | |
381 | } | |
382 | ||
383 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 384 | int rotate, unsigned int num) |
9c44e5f6 | 385 | { |
448d4797 | 386 | unsigned int x; |
9c44e5f6 AD |
387 | |
388 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
389 | for (x = 0; |
390 | x < num && image->dx + image->width <= info->var.xres; | |
391 | x++) { | |
9c44e5f6 | 392 | info->fbops->fb_imageblit(info, image); |
448d4797 | 393 | image->dx += image->width + 8; |
9c44e5f6 AD |
394 | } |
395 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 396 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 397 | info->fbops->fb_imageblit(info, image); |
448d4797 | 398 | image->dx -= image->width + 8; |
9c44e5f6 AD |
399 | } |
400 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
401 | for (x = 0; |
402 | x < num && image->dy + image->height <= info->var.yres; | |
403 | x++) { | |
9c44e5f6 | 404 | info->fbops->fb_imageblit(info, image); |
448d4797 | 405 | image->dy += image->height + 8; |
9c44e5f6 AD |
406 | } |
407 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 408 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 409 | info->fbops->fb_imageblit(info, image); |
448d4797 | 410 | image->dy -= image->height + 8; |
9c44e5f6 AD |
411 | } |
412 | } | |
413 | } | |
414 | ||
90da63e5 GU |
415 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
416 | const struct linux_logo *logo, int y, | |
417 | unsigned int n) | |
1da177e4 LT |
418 | { |
419 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 420 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 421 | struct fb_image image; |
1da177e4 LT |
422 | |
423 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 424 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 425 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
426 | return 0; |
427 | ||
428 | image.depth = 8; | |
90da63e5 | 429 | image.data = logo->data; |
1da177e4 LT |
430 | |
431 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 432 | fb_set_logocmap(info, logo); |
1da177e4 | 433 | |
9900abfb | 434 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
435 | fb_logo.needs_directpalette) { |
436 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
437 | if (palette == NULL) | |
438 | return 0; | |
439 | ||
440 | if (fb_logo.needs_truepalette) | |
90da63e5 | 441 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 442 | else |
90da63e5 | 443 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
444 | |
445 | saved_pseudo_palette = info->pseudo_palette; | |
446 | info->pseudo_palette = palette; | |
447 | } | |
448 | ||
449 | if (fb_logo.depth <= 4) { | |
90da63e5 | 450 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
451 | if (logo_new == NULL) { |
452 | kfree(palette); | |
453 | if (saved_pseudo_palette) | |
454 | info->pseudo_palette = saved_pseudo_palette; | |
455 | return 0; | |
456 | } | |
457 | image.data = logo_new; | |
90da63e5 | 458 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
459 | } |
460 | ||
9c44e5f6 | 461 | image.dx = 0; |
90da63e5 GU |
462 | image.dy = y; |
463 | image.width = logo->width; | |
464 | image.height = logo->height; | |
1da177e4 | 465 | |
9c44e5f6 | 466 | if (rotate) { |
90da63e5 GU |
467 | logo_rotate = kmalloc(logo->width * |
468 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
469 | if (logo_rotate) |
470 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 471 | } |
9c44e5f6 | 472 | |
90da63e5 | 473 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 474 | |
1da177e4 LT |
475 | kfree(palette); |
476 | if (saved_pseudo_palette != NULL) | |
477 | info->pseudo_palette = saved_pseudo_palette; | |
478 | kfree(logo_new); | |
9c44e5f6 | 479 | kfree(logo_rotate); |
90da63e5 GU |
480 | return logo->height; |
481 | } | |
482 | ||
9900abfb GU |
483 | |
484 | #ifdef CONFIG_FB_LOGO_EXTRA | |
485 | ||
486 | #define FB_LOGO_EX_NUM_MAX 10 | |
487 | static struct logo_data_extra { | |
488 | const struct linux_logo *logo; | |
489 | unsigned int n; | |
490 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
491 | static unsigned int fb_logo_ex_num; | |
492 | ||
493 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
494 | { | |
495 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
496 | return; | |
497 | ||
498 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
499 | fb_logo_ex[fb_logo_ex_num].n = n; | |
500 | fb_logo_ex_num++; | |
501 | } | |
502 | ||
503 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
504 | unsigned int yres) | |
505 | { | |
506 | unsigned int i; | |
507 | ||
508 | /* FIXME: logo_ex supports only truecolor fb. */ | |
509 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
510 | fb_logo_ex_num = 0; | |
511 | ||
512 | for (i = 0; i < fb_logo_ex_num; i++) { | |
513 | height += fb_logo_ex[i].logo->height; | |
514 | if (height > yres) { | |
515 | height -= fb_logo_ex[i].logo->height; | |
516 | fb_logo_ex_num = i; | |
517 | break; | |
518 | } | |
519 | } | |
520 | return height; | |
521 | } | |
522 | ||
523 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
524 | { | |
525 | unsigned int i; | |
526 | ||
527 | for (i = 0; i < fb_logo_ex_num; i++) | |
528 | y += fb_show_logo_line(info, rotate, | |
529 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
530 | ||
531 | return y; | |
532 | } | |
533 | ||
534 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
535 | ||
536 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
537 | unsigned int height, | |
538 | unsigned int yres) | |
539 | { | |
540 | return height; | |
541 | } | |
542 | ||
543 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
544 | { | |
545 | return y; | |
546 | } | |
547 | ||
548 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
549 | ||
550 | ||
551 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
552 | { | |
553 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
554 | unsigned int yres; | |
555 | ||
556 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
557 | ||
558 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
559 | info->flags & FBINFO_MODULE) | |
560 | return 0; | |
561 | ||
562 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
563 | depth = info->var.blue.length; | |
564 | if (info->var.red.length < depth) | |
565 | depth = info->var.red.length; | |
566 | if (info->var.green.length < depth) | |
567 | depth = info->var.green.length; | |
568 | } | |
569 | ||
570 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
571 | /* assume console colormap */ | |
572 | depth = 4; | |
573 | } | |
574 | ||
9900abfb GU |
575 | /* Return if no suitable logo was found */ |
576 | fb_logo.logo = fb_find_logo(depth); | |
577 | ||
578 | if (!fb_logo.logo) { | |
579 | return 0; | |
580 | } | |
581 | ||
582 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
583 | yres = info->var.yres; | |
584 | else | |
585 | yres = info->var.xres; | |
586 | ||
587 | if (fb_logo.logo->height > yres) { | |
588 | fb_logo.logo = NULL; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | /* What depth we asked for might be different from what we get */ | |
593 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
594 | fb_logo.depth = 8; | |
595 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
596 | fb_logo.depth = 4; | |
597 | else | |
598 | fb_logo.depth = 1; | |
599 | ||
1692b37c AD |
600 | |
601 | if (fb_logo.depth > 4 && depth > 4) { | |
602 | switch (info->fix.visual) { | |
603 | case FB_VISUAL_TRUECOLOR: | |
604 | fb_logo.needs_truepalette = 1; | |
605 | break; | |
606 | case FB_VISUAL_DIRECTCOLOR: | |
607 | fb_logo.needs_directpalette = 1; | |
608 | fb_logo.needs_cmapreset = 1; | |
609 | break; | |
610 | case FB_VISUAL_PSEUDOCOLOR: | |
611 | fb_logo.needs_cmapreset = 1; | |
612 | break; | |
613 | } | |
614 | } | |
615 | ||
9900abfb GU |
616 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
617 | } | |
618 | ||
90da63e5 GU |
619 | int fb_show_logo(struct fb_info *info, int rotate) |
620 | { | |
9900abfb GU |
621 | int y; |
622 | ||
623 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
624 | num_online_cpus()); | |
625 | y = fb_show_extra_logos(info, y, rotate); | |
626 | ||
627 | return y; | |
1da177e4 LT |
628 | } |
629 | #else | |
9c44e5f6 AD |
630 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
631 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
632 | #endif /* CONFIG_LOGO */ |
633 | ||
0aa16341 AD |
634 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
635 | { | |
636 | return (*pos < FB_MAX) ? pos : NULL; | |
637 | } | |
638 | ||
639 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
640 | { | |
641 | (*pos)++; | |
642 | return (*pos < FB_MAX) ? pos : NULL; | |
643 | } | |
644 | ||
645 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 646 | { |
1da177e4 LT |
647 | } |
648 | ||
0aa16341 AD |
649 | static int fb_seq_show(struct seq_file *m, void *v) |
650 | { | |
651 | int i = *(loff_t *)v; | |
652 | struct fb_info *fi = registered_fb[i]; | |
653 | ||
654 | if (fi) | |
655 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
656 | return 0; | |
657 | } | |
658 | ||
659 | static const struct seq_operations proc_fb_seq_ops = { | |
660 | .start = fb_seq_start, | |
661 | .next = fb_seq_next, | |
662 | .stop = fb_seq_stop, | |
663 | .show = fb_seq_show, | |
664 | }; | |
665 | ||
666 | static int proc_fb_open(struct inode *inode, struct file *file) | |
667 | { | |
668 | return seq_open(file, &proc_fb_seq_ops); | |
669 | } | |
670 | ||
671 | static const struct file_operations fb_proc_fops = { | |
672 | .owner = THIS_MODULE, | |
673 | .open = proc_fb_open, | |
674 | .read = seq_read, | |
675 | .llseek = seq_lseek, | |
676 | .release = seq_release, | |
677 | }; | |
678 | ||
1da177e4 LT |
679 | static ssize_t |
680 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
681 | { | |
682 | unsigned long p = *ppos; | |
ad9a824e | 683 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
684 | int fbidx = iminor(inode); |
685 | struct fb_info *info = registered_fb[fbidx]; | |
686 | u32 *buffer, *dst; | |
687 | u32 __iomem *src; | |
688 | int c, i, cnt = 0, err = 0; | |
689 | unsigned long total_size; | |
690 | ||
691 | if (!info || ! info->screen_base) | |
692 | return -ENODEV; | |
693 | ||
694 | if (info->state != FBINFO_STATE_RUNNING) | |
695 | return -EPERM; | |
696 | ||
697 | if (info->fbops->fb_read) | |
3f9b0880 | 698 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
699 | |
700 | total_size = info->screen_size; | |
0a484a3a | 701 | |
1da177e4 LT |
702 | if (total_size == 0) |
703 | total_size = info->fix.smem_len; | |
704 | ||
705 | if (p >= total_size) | |
0a484a3a AD |
706 | return 0; |
707 | ||
1da177e4 | 708 | if (count >= total_size) |
0a484a3a AD |
709 | count = total_size; |
710 | ||
1da177e4 LT |
711 | if (count + p > total_size) |
712 | count = total_size - p; | |
713 | ||
1da177e4 LT |
714 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
715 | GFP_KERNEL); | |
716 | if (!buffer) | |
717 | return -ENOMEM; | |
718 | ||
719 | src = (u32 __iomem *) (info->screen_base + p); | |
720 | ||
721 | if (info->fbops->fb_sync) | |
722 | info->fbops->fb_sync(info); | |
723 | ||
724 | while (count) { | |
725 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
726 | dst = buffer; | |
727 | for (i = c >> 2; i--; ) | |
728 | *dst++ = fb_readl(src++); | |
729 | if (c & 3) { | |
730 | u8 *dst8 = (u8 *) dst; | |
731 | u8 __iomem *src8 = (u8 __iomem *) src; | |
732 | ||
733 | for (i = c & 3; i--;) | |
734 | *dst8++ = fb_readb(src8++); | |
735 | ||
736 | src = (u32 __iomem *) src8; | |
737 | } | |
738 | ||
739 | if (copy_to_user(buf, buffer, c)) { | |
740 | err = -EFAULT; | |
741 | break; | |
742 | } | |
743 | *ppos += c; | |
744 | buf += c; | |
745 | cnt += c; | |
746 | count -= c; | |
747 | } | |
748 | ||
749 | kfree(buffer); | |
0a484a3a | 750 | |
1da177e4 LT |
751 | return (err) ? err : cnt; |
752 | } | |
753 | ||
754 | static ssize_t | |
755 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
756 | { | |
757 | unsigned long p = *ppos; | |
ad9a824e | 758 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
759 | int fbidx = iminor(inode); |
760 | struct fb_info *info = registered_fb[fbidx]; | |
761 | u32 *buffer, *src; | |
762 | u32 __iomem *dst; | |
0a484a3a | 763 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
764 | unsigned long total_size; |
765 | ||
766 | if (!info || !info->screen_base) | |
767 | return -ENODEV; | |
768 | ||
769 | if (info->state != FBINFO_STATE_RUNNING) | |
770 | return -EPERM; | |
771 | ||
772 | if (info->fbops->fb_write) | |
3f9b0880 | 773 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
774 | |
775 | total_size = info->screen_size; | |
0a484a3a | 776 | |
1da177e4 LT |
777 | if (total_size == 0) |
778 | total_size = info->fix.smem_len; | |
779 | ||
780 | if (p > total_size) | |
6a2a8866 | 781 | return -EFBIG; |
0a484a3a | 782 | |
6a2a8866 AD |
783 | if (count > total_size) { |
784 | err = -EFBIG; | |
0a484a3a | 785 | count = total_size; |
6a2a8866 AD |
786 | } |
787 | ||
788 | if (count + p > total_size) { | |
789 | if (!err) | |
790 | err = -ENOSPC; | |
0a484a3a | 791 | |
0a484a3a | 792 | count = total_size - p; |
6a2a8866 | 793 | } |
0a484a3a | 794 | |
1da177e4 LT |
795 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
796 | GFP_KERNEL); | |
797 | if (!buffer) | |
798 | return -ENOMEM; | |
799 | ||
800 | dst = (u32 __iomem *) (info->screen_base + p); | |
801 | ||
802 | if (info->fbops->fb_sync) | |
803 | info->fbops->fb_sync(info); | |
804 | ||
805 | while (count) { | |
806 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
807 | src = buffer; | |
0a484a3a | 808 | |
1da177e4 LT |
809 | if (copy_from_user(src, buf, c)) { |
810 | err = -EFAULT; | |
811 | break; | |
812 | } | |
0a484a3a | 813 | |
1da177e4 LT |
814 | for (i = c >> 2; i--; ) |
815 | fb_writel(*src++, dst++); | |
0a484a3a | 816 | |
1da177e4 LT |
817 | if (c & 3) { |
818 | u8 *src8 = (u8 *) src; | |
819 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
820 | ||
821 | for (i = c & 3; i--; ) | |
822 | fb_writeb(*src8++, dst8++); | |
823 | ||
824 | dst = (u32 __iomem *) dst8; | |
825 | } | |
0a484a3a | 826 | |
1da177e4 LT |
827 | *ppos += c; |
828 | buf += c; | |
829 | cnt += c; | |
830 | count -= c; | |
831 | } | |
0a484a3a | 832 | |
1da177e4 LT |
833 | kfree(buffer); |
834 | ||
6a2a8866 | 835 | return (cnt) ? cnt : err; |
1da177e4 LT |
836 | } |
837 | ||
1da177e4 LT |
838 | int |
839 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
840 | { | |
1207069f | 841 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
842 | unsigned int yres = info->var.yres; |
843 | int err = 0; | |
1207069f AD |
844 | |
845 | if (var->yoffset > 0) { | |
846 | if (var->vmode & FB_VMODE_YWRAP) { | |
847 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
848 | err = -EINVAL; | |
849 | else | |
850 | yres = 0; | |
851 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
852 | err = -EINVAL; | |
853 | } | |
854 | ||
855 | if (var->xoffset > 0 && (!fix->xpanstep || | |
856 | (var->xoffset % fix->xpanstep))) | |
857 | err = -EINVAL; | |
858 | ||
7572a1ea VS |
859 | if (err || !info->fbops->fb_pan_display || |
860 | var->yoffset + yres > info->var.yres_virtual || | |
1207069f AD |
861 | var->xoffset + info->var.xres > info->var.xres_virtual) |
862 | return -EINVAL; | |
1da177e4 | 863 | |
1da177e4 LT |
864 | if ((err = info->fbops->fb_pan_display(var, info))) |
865 | return err; | |
866 | info->var.xoffset = var->xoffset; | |
867 | info->var.yoffset = var->yoffset; | |
868 | if (var->vmode & FB_VMODE_YWRAP) | |
869 | info->var.vmode |= FB_VMODE_YWRAP; | |
870 | else | |
871 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
872 | return 0; | |
873 | } | |
874 | ||
38a3dc51 AD |
875 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
876 | u32 activate) | |
877 | { | |
878 | struct fb_event event; | |
879 | struct fb_blit_caps caps, fbcaps; | |
880 | int err = 0; | |
881 | ||
882 | memset(&caps, 0, sizeof(caps)); | |
883 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
884 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
885 | event.info = info; | |
886 | event.data = ∩︀ | |
887 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
888 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
889 | ||
890 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
891 | ((fbcaps.y ^ caps.y) & caps.y) || | |
892 | (fbcaps.len < caps.len)) | |
893 | err = -EINVAL; | |
894 | ||
895 | return err; | |
896 | } | |
897 | ||
1da177e4 LT |
898 | int |
899 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
900 | { | |
b1e7223f AD |
901 | int flags = info->flags; |
902 | int ret = 0; | |
1da177e4 LT |
903 | |
904 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
905 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
906 | |
907 | fb_var_to_videomode(&mode1, var); | |
908 | fb_var_to_videomode(&mode2, &info->var); | |
909 | /* make sure we don't delete the videomode of current var */ | |
910 | ret = fb_mode_is_equal(&mode1, &mode2); | |
911 | ||
912 | if (!ret) { | |
913 | struct fb_event event; | |
914 | ||
915 | event.info = info; | |
916 | event.data = &mode1; | |
256154fb | 917 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
918 | } |
919 | ||
920 | if (!ret) | |
921 | fb_delete_videomode(&mode1, &info->modelist); | |
922 | ||
b1e7223f AD |
923 | |
924 | ret = (ret) ? -EINVAL : 0; | |
925 | goto done; | |
1da177e4 LT |
926 | } |
927 | ||
928 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
929 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
930 | u32 activate = var->activate; |
931 | ||
1da177e4 LT |
932 | if (!info->fbops->fb_check_var) { |
933 | *var = info->var; | |
b1e7223f | 934 | goto done; |
1da177e4 LT |
935 | } |
936 | ||
b1e7223f AD |
937 | ret = info->fbops->fb_check_var(var, info); |
938 | ||
939 | if (ret) | |
940 | goto done; | |
1da177e4 LT |
941 | |
942 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
943 | struct fb_videomode mode; | |
1da177e4 | 944 | |
38a3dc51 | 945 | if (info->fbops->fb_get_caps) { |
b1e7223f | 946 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 947 | |
b1e7223f | 948 | if (ret) |
38a3dc51 AD |
949 | goto done; |
950 | } | |
951 | ||
1da177e4 | 952 | info->var = *var; |
38a3dc51 | 953 | |
1da177e4 LT |
954 | if (info->fbops->fb_set_par) |
955 | info->fbops->fb_set_par(info); | |
956 | ||
957 | fb_pan_display(info, &info->var); | |
1da177e4 | 958 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
959 | fb_var_to_videomode(&mode, &info->var); |
960 | ||
961 | if (info->modelist.prev && info->modelist.next && | |
962 | !list_empty(&info->modelist)) | |
b1e7223f | 963 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 964 | |
b1e7223f | 965 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 966 | struct fb_event event; |
4941cb7a | 967 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
968 | FB_EVENT_MODE_CHANGE_ALL : |
969 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
970 | |
971 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
972 | event.info = info; | |
faa312da | 973 | event.data = &mode; |
256154fb | 974 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
975 | } |
976 | } | |
977 | } | |
38a3dc51 AD |
978 | |
979 | done: | |
b1e7223f | 980 | return ret; |
1da177e4 LT |
981 | } |
982 | ||
983 | int | |
984 | fb_blank(struct fb_info *info, int blank) | |
985 | { | |
986 | int ret = -EINVAL; | |
987 | ||
988 | if (blank > FB_BLANK_POWERDOWN) | |
989 | blank = FB_BLANK_POWERDOWN; | |
990 | ||
991 | if (info->fbops->fb_blank) | |
992 | ret = info->fbops->fb_blank(blank, info); | |
993 | ||
994 | if (!ret) { | |
995 | struct fb_event event; | |
996 | ||
997 | event.info = info; | |
998 | event.data = ␣ | |
256154fb | 999 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
a684e7d3 GU |
1005 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1006 | unsigned long arg) | |
1da177e4 | 1007 | { |
e5367711 | 1008 | struct fb_ops *fb; |
1da177e4 LT |
1009 | struct fb_var_screeninfo var; |
1010 | struct fb_fix_screeninfo fix; | |
1011 | struct fb_con2fbmap con2fb; | |
1012 | struct fb_cmap_user cmap; | |
1013 | struct fb_event event; | |
1014 | void __user *argp = (void __user *)arg; | |
e5367711 AC |
1015 | long ret = 0; |
1016 | ||
e5367711 | 1017 | fb = info->fbops; |
a684e7d3 | 1018 | if (!fb) |
1da177e4 | 1019 | return -ENODEV; |
a684e7d3 | 1020 | |
1da177e4 LT |
1021 | switch (cmd) { |
1022 | case FBIOGET_VSCREENINFO: | |
e5367711 | 1023 | ret = copy_to_user(argp, &info->var, |
1da177e4 | 1024 | sizeof(var)) ? -EFAULT : 0; |
e5367711 | 1025 | break; |
1da177e4 | 1026 | case FBIOPUT_VSCREENINFO: |
e5367711 AC |
1027 | if (copy_from_user(&var, argp, sizeof(var))) { |
1028 | ret = -EFAULT; | |
1029 | break; | |
1030 | } | |
1da177e4 LT |
1031 | acquire_console_sem(); |
1032 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1033 | ret = fb_set_var(info, &var); |
1da177e4 LT |
1034 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1035 | release_console_sem(); | |
e5367711 AC |
1036 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1037 | ret = -EFAULT; | |
1038 | break; | |
1da177e4 | 1039 | case FBIOGET_FSCREENINFO: |
e5367711 | 1040 | ret = copy_to_user(argp, &info->fix, |
1da177e4 | 1041 | sizeof(fix)) ? -EFAULT : 0; |
e5367711 | 1042 | break; |
1da177e4 LT |
1043 | case FBIOPUTCMAP: |
1044 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
e5367711 AC |
1045 | ret = -EFAULT; |
1046 | else | |
1047 | ret = fb_set_user_cmap(&cmap, info); | |
1048 | break; | |
1da177e4 LT |
1049 | case FBIOGETCMAP: |
1050 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
e5367711 AC |
1051 | ret = -EFAULT; |
1052 | else | |
1053 | ret = fb_cmap_to_user(&info->cmap, &cmap); | |
1054 | break; | |
1da177e4 | 1055 | case FBIOPAN_DISPLAY: |
e5367711 AC |
1056 | if (copy_from_user(&var, argp, sizeof(var))) { |
1057 | ret = -EFAULT; | |
1058 | break; | |
1059 | } | |
1da177e4 | 1060 | acquire_console_sem(); |
e5367711 | 1061 | ret = fb_pan_display(info, &var); |
1da177e4 | 1062 | release_console_sem(); |
e5367711 AC |
1063 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1064 | ret = -EFAULT; | |
1065 | break; | |
1da177e4 | 1066 | case FBIO_CURSOR: |
e5367711 AC |
1067 | ret = -EINVAL; |
1068 | break; | |
1da177e4 LT |
1069 | case FBIOGET_CON2FBMAP: |
1070 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
e5367711 AC |
1071 | ret = -EFAULT; |
1072 | else if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1073 | ret = -EINVAL; | |
1074 | else { | |
1075 | con2fb.framebuffer = -1; | |
1076 | event.info = info; | |
1077 | event.data = &con2fb; | |
1078 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, | |
1079 | &event); | |
1080 | ret = copy_to_user(argp, &con2fb, | |
1da177e4 | 1081 | sizeof(con2fb)) ? -EFAULT : 0; |
e5367711 AC |
1082 | } |
1083 | break; | |
1da177e4 | 1084 | case FBIOPUT_CON2FBMAP: |
e5367711 AC |
1085 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) { |
1086 | ret = -EFAULT; | |
1087 | break; | |
1088 | } | |
1089 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) { | |
1090 | ret = -EINVAL; | |
1091 | break; | |
1092 | } | |
1093 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) { | |
1094 | ret = -EINVAL; | |
1095 | break; | |
1096 | } | |
1da177e4 | 1097 | if (!registered_fb[con2fb.framebuffer]) |
e5367711 AC |
1098 | request_module("fb%d", con2fb.framebuffer); |
1099 | if (!registered_fb[con2fb.framebuffer]) { | |
1100 | ret = -EINVAL; | |
1101 | break; | |
1102 | } | |
1da177e4 LT |
1103 | event.info = info; |
1104 | event.data = &con2fb; | |
e5367711 | 1105 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
256154fb | 1106 | &event); |
e5367711 | 1107 | break; |
1da177e4 LT |
1108 | case FBIOBLANK: |
1109 | acquire_console_sem(); | |
1110 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1111 | ret = fb_blank(info, arg); |
1da177e4 LT |
1112 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1113 | release_console_sem(); | |
e5367711 | 1114 | break;; |
1da177e4 LT |
1115 | default: |
1116 | if (fb->fb_ioctl == NULL) | |
e5367711 AC |
1117 | ret = -ENOTTY; |
1118 | else | |
1119 | ret = fb->fb_ioctl(info, cmd, arg); | |
1da177e4 | 1120 | } |
a684e7d3 GU |
1121 | return ret; |
1122 | } | |
1123 | ||
1124 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1125 | __acquires(&info->lock) | |
1126 | __releases(&info->lock) | |
1127 | { | |
1128 | struct inode *inode = file->f_path.dentry->d_inode; | |
1129 | int fbidx = iminor(inode); | |
1130 | struct fb_info *info; | |
1131 | long ret; | |
1132 | ||
1133 | info = registered_fb[fbidx]; | |
1134 | mutex_lock(&info->lock); | |
1135 | ret = do_fb_ioctl(info, cmd, arg); | |
3e680aae | 1136 | mutex_unlock(&info->lock); |
e5367711 | 1137 | return ret; |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1141 | struct fb_fix_screeninfo32 { |
1142 | char id[16]; | |
1143 | compat_caddr_t smem_start; | |
1144 | u32 smem_len; | |
1145 | u32 type; | |
1146 | u32 type_aux; | |
1147 | u32 visual; | |
1148 | u16 xpanstep; | |
1149 | u16 ypanstep; | |
1150 | u16 ywrapstep; | |
1151 | u32 line_length; | |
1152 | compat_caddr_t mmio_start; | |
1153 | u32 mmio_len; | |
1154 | u32 accel; | |
1155 | u16 reserved[3]; | |
1156 | }; | |
1157 | ||
1158 | struct fb_cmap32 { | |
1159 | u32 start; | |
1160 | u32 len; | |
1161 | compat_caddr_t red; | |
1162 | compat_caddr_t green; | |
1163 | compat_caddr_t blue; | |
1164 | compat_caddr_t transp; | |
1165 | }; | |
1166 | ||
a684e7d3 GU |
1167 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1168 | unsigned long arg) | |
c7f82d9c AB |
1169 | { |
1170 | struct fb_cmap_user __user *cmap; | |
1171 | struct fb_cmap32 __user *cmap32; | |
1172 | __u32 data; | |
1173 | int err; | |
1174 | ||
1175 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1176 | cmap32 = compat_ptr(arg); | |
1177 | ||
1178 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1179 | return -EFAULT; | |
1180 | ||
1181 | if (get_user(data, &cmap32->red) || | |
1182 | put_user(compat_ptr(data), &cmap->red) || | |
1183 | get_user(data, &cmap32->green) || | |
1184 | put_user(compat_ptr(data), &cmap->green) || | |
1185 | get_user(data, &cmap32->blue) || | |
1186 | put_user(compat_ptr(data), &cmap->blue) || | |
1187 | get_user(data, &cmap32->transp) || | |
1188 | put_user(compat_ptr(data), &cmap->transp)) | |
1189 | return -EFAULT; | |
1190 | ||
a684e7d3 | 1191 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
c7f82d9c AB |
1192 | |
1193 | if (!err) { | |
1194 | if (copy_in_user(&cmap32->start, | |
1195 | &cmap->start, | |
1196 | 2 * sizeof(__u32))) | |
1197 | err = -EFAULT; | |
1198 | } | |
1199 | return err; | |
1200 | } | |
1201 | ||
1202 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1203 | struct fb_fix_screeninfo32 __user *fix32) | |
1204 | { | |
1205 | __u32 data; | |
1206 | int err; | |
1207 | ||
1208 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1209 | ||
1210 | data = (__u32) (unsigned long) fix->smem_start; | |
1211 | err |= put_user(data, &fix32->smem_start); | |
1212 | ||
1213 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1214 | err |= put_user(fix->type, &fix32->type); | |
1215 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1216 | err |= put_user(fix->visual, &fix32->visual); | |
1217 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1218 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1219 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1220 | err |= put_user(fix->line_length, &fix32->line_length); | |
1221 | ||
1222 | data = (__u32) (unsigned long) fix->mmio_start; | |
1223 | err |= put_user(data, &fix32->mmio_start); | |
1224 | ||
1225 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1226 | err |= put_user(fix->accel, &fix32->accel); | |
1227 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1228 | sizeof(fix->reserved)); | |
1229 | ||
1230 | return err; | |
1231 | } | |
1232 | ||
a684e7d3 GU |
1233 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1234 | unsigned long arg) | |
c7f82d9c AB |
1235 | { |
1236 | mm_segment_t old_fs; | |
1237 | struct fb_fix_screeninfo fix; | |
1238 | struct fb_fix_screeninfo32 __user *fix32; | |
1239 | int err; | |
1240 | ||
1241 | fix32 = compat_ptr(arg); | |
1242 | ||
1243 | old_fs = get_fs(); | |
1244 | set_fs(KERNEL_DS); | |
a684e7d3 | 1245 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
c7f82d9c AB |
1246 | set_fs(old_fs); |
1247 | ||
1248 | if (!err) | |
1249 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1250 | ||
1251 | return err; | |
1252 | } | |
1253 | ||
a684e7d3 GU |
1254 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1255 | unsigned long arg) | |
1256 | __acquires(&info->lock) | |
1257 | __releases(&info->lock) | |
1da177e4 | 1258 | { |
ad9a824e | 1259 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1260 | int fbidx = iminor(inode); |
1da177e4 LT |
1261 | struct fb_info *info = registered_fb[fbidx]; |
1262 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1263 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1264 | |
3e680aae | 1265 | mutex_lock(&info->lock); |
c7f82d9c AB |
1266 | switch(cmd) { |
1267 | case FBIOGET_VSCREENINFO: | |
1268 | case FBIOPUT_VSCREENINFO: | |
1269 | case FBIOPAN_DISPLAY: | |
1270 | case FBIOGET_CON2FBMAP: | |
1271 | case FBIOPUT_CON2FBMAP: | |
1272 | arg = (unsigned long) compat_ptr(arg); | |
1273 | case FBIOBLANK: | |
a684e7d3 GU |
1274 | ret = do_fb_ioctl(info, cmd, arg); |
1275 | break; | |
c7f82d9c AB |
1276 | |
1277 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1278 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1279 | break; |
1280 | ||
1281 | case FBIOGETCMAP: | |
1282 | case FBIOPUTCMAP: | |
a684e7d3 | 1283 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1284 | break; |
1285 | ||
1286 | default: | |
1287 | if (fb->fb_compat_ioctl) | |
67a6680d | 1288 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1289 | break; |
1290 | } | |
3e680aae | 1291 | mutex_unlock(&info->lock); |
1da177e4 LT |
1292 | return ret; |
1293 | } | |
1294 | #endif | |
1295 | ||
10eb2659 | 1296 | static int |
1da177e4 | 1297 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
a684e7d3 GU |
1298 | __acquires(&info->lock) |
1299 | __releases(&info->lock) | |
1da177e4 | 1300 | { |
ad9a824e | 1301 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1302 | struct fb_info *info = registered_fb[fbidx]; |
1303 | struct fb_ops *fb = info->fbops; | |
1304 | unsigned long off; | |
1da177e4 LT |
1305 | unsigned long start; |
1306 | u32 len; | |
1da177e4 LT |
1307 | |
1308 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1309 | return -EINVAL; | |
1310 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1311 | if (!fb) | |
1312 | return -ENODEV; | |
1313 | if (fb->fb_mmap) { | |
1314 | int res; | |
3e680aae | 1315 | mutex_lock(&info->lock); |
216d526c | 1316 | res = fb->fb_mmap(info, vma); |
3e680aae | 1317 | mutex_unlock(&info->lock); |
1da177e4 LT |
1318 | return res; |
1319 | } | |
1320 | ||
3e680aae | 1321 | mutex_lock(&info->lock); |
1da177e4 LT |
1322 | |
1323 | /* frame buffer memory */ | |
1324 | start = info->fix.smem_start; | |
1325 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1326 | if (off >= len) { | |
1327 | /* memory mapped io */ | |
1328 | off -= len; | |
1329 | if (info->var.accel_flags) { | |
3e680aae | 1330 | mutex_unlock(&info->lock); |
1da177e4 LT |
1331 | return -EINVAL; |
1332 | } | |
1333 | start = info->fix.mmio_start; | |
1334 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1335 | } | |
3e680aae | 1336 | mutex_unlock(&info->lock); |
1da177e4 LT |
1337 | start &= PAGE_MASK; |
1338 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1339 | return -EINVAL; | |
1340 | off += start; | |
1341 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1342 | /* This is an IO map - tell maydump to skip this VMA */ | |
1343 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1344 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1345 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1346 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1347 | return -EAGAIN; | |
1da177e4 | 1348 | return 0; |
1da177e4 LT |
1349 | } |
1350 | ||
1351 | static int | |
1352 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1353 | __acquires(&info->lock) |
1354 | __releases(&info->lock) | |
1da177e4 LT |
1355 | { |
1356 | int fbidx = iminor(inode); | |
1357 | struct fb_info *info; | |
1358 | int res = 0; | |
1359 | ||
1360 | if (fbidx >= FB_MAX) | |
1361 | return -ENODEV; | |
3e680aae KH |
1362 | info = registered_fb[fbidx]; |
1363 | if (!info) | |
a65e5d78 | 1364 | request_module("fb%d", fbidx); |
3e680aae KH |
1365 | info = registered_fb[fbidx]; |
1366 | if (!info) | |
1367 | return -ENODEV; | |
1368 | mutex_lock(&info->lock); | |
fc7f687a JC |
1369 | if (!try_module_get(info->fbops->owner)) { |
1370 | res = -ENODEV; | |
1371 | goto out; | |
1372 | } | |
cae8a12f | 1373 | file->private_data = info; |
1da177e4 LT |
1374 | if (info->fbops->fb_open) { |
1375 | res = info->fbops->fb_open(info,1); | |
1376 | if (res) | |
1377 | module_put(info->fbops->owner); | |
1378 | } | |
d847471d IC |
1379 | #ifdef CONFIG_FB_DEFERRED_IO |
1380 | if (info->fbdefio) | |
1381 | fb_deferred_io_open(info, inode, file); | |
1382 | #endif | |
fc7f687a | 1383 | out: |
3e680aae | 1384 | mutex_unlock(&info->lock); |
1da177e4 LT |
1385 | return res; |
1386 | } | |
1387 | ||
1388 | static int | |
1389 | fb_release(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1390 | __acquires(&info->lock) |
1391 | __releases(&info->lock) | |
1da177e4 | 1392 | { |
cae8a12f | 1393 | struct fb_info * const info = file->private_data; |
1da177e4 | 1394 | |
3e680aae | 1395 | mutex_lock(&info->lock); |
1da177e4 LT |
1396 | if (info->fbops->fb_release) |
1397 | info->fbops->fb_release(info,1); | |
1398 | module_put(info->fbops->owner); | |
3e680aae | 1399 | mutex_unlock(&info->lock); |
1da177e4 LT |
1400 | return 0; |
1401 | } | |
1402 | ||
0128beee | 1403 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1404 | .owner = THIS_MODULE, |
1405 | .read = fb_read, | |
1406 | .write = fb_write, | |
e5367711 | 1407 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1408 | #ifdef CONFIG_COMPAT |
1409 | .compat_ioctl = fb_compat_ioctl, | |
1410 | #endif | |
1411 | .mmap = fb_mmap, | |
1412 | .open = fb_open, | |
1413 | .release = fb_release, | |
1414 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1415 | .get_unmapped_area = get_fb_unmapped_area, | |
1416 | #endif | |
5e841b88 PM |
1417 | #ifdef CONFIG_FB_DEFERRED_IO |
1418 | .fsync = fb_deferred_io_fsync, | |
1419 | #endif | |
1da177e4 LT |
1420 | }; |
1421 | ||
9a179176 AD |
1422 | struct class *fb_class; |
1423 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1424 | |
1425 | static int fb_check_foreignness(struct fb_info *fi) | |
1426 | { | |
1427 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1428 | ||
1429 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1430 | ||
1431 | #ifdef __BIG_ENDIAN | |
1432 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1433 | #else | |
1434 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1435 | #endif /* __BIG_ENDIAN */ | |
1436 | ||
1437 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1438 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1439 | "support this framebuffer\n", fi->fix.id); | |
1440 | return -ENOSYS; | |
1441 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1442 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1443 | "support this framebuffer\n", fi->fix.id); | |
1444 | return -ENOSYS; | |
1445 | } | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
1da177e4 LT |
1450 | /** |
1451 | * register_framebuffer - registers a frame buffer device | |
1452 | * @fb_info: frame buffer info structure | |
1453 | * | |
1454 | * Registers a frame buffer device @fb_info. | |
1455 | * | |
1456 | * Returns negative errno on error, or zero for success. | |
1457 | * | |
1458 | */ | |
1459 | ||
1460 | int | |
1461 | register_framebuffer(struct fb_info *fb_info) | |
1462 | { | |
1463 | int i; | |
1464 | struct fb_event event; | |
96fe6a21 | 1465 | struct fb_videomode mode; |
1da177e4 LT |
1466 | |
1467 | if (num_registered_fb == FB_MAX) | |
1468 | return -ENXIO; | |
e4c690e0 AV |
1469 | |
1470 | if (fb_check_foreignness(fb_info)) | |
1471 | return -ENOSYS; | |
1472 | ||
1da177e4 LT |
1473 | num_registered_fb++; |
1474 | for (i = 0 ; i < FB_MAX; i++) | |
1475 | if (!registered_fb[i]) | |
1476 | break; | |
1477 | fb_info->node = i; | |
3e680aae | 1478 | mutex_init(&fb_info->lock); |
1da177e4 | 1479 | |
77997aaa GKH |
1480 | fb_info->dev = device_create(fb_class, fb_info->device, |
1481 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1482 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1483 | /* Not fatal */ |
78cde088 GKH |
1484 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1485 | fb_info->dev = NULL; | |
1da177e4 | 1486 | } else |
78cde088 | 1487 | fb_init_device(fb_info); |
1da177e4 LT |
1488 | |
1489 | if (fb_info->pixmap.addr == NULL) { | |
1490 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1491 | if (fb_info->pixmap.addr) { | |
1492 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1493 | fb_info->pixmap.buf_align = 1; | |
1494 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1495 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1496 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1497 | } | |
1498 | } | |
1499 | fb_info->pixmap.offset = 0; | |
1500 | ||
bf26ad72 AD |
1501 | if (!fb_info->pixmap.blit_x) |
1502 | fb_info->pixmap.blit_x = ~(u32)0; | |
1503 | ||
1504 | if (!fb_info->pixmap.blit_y) | |
1505 | fb_info->pixmap.blit_y = ~(u32)0; | |
1506 | ||
96fe6a21 | 1507 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1508 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1509 | |
96fe6a21 AD |
1510 | fb_var_to_videomode(&mode, &fb_info->var); |
1511 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1512 | registered_fb[i] = fb_info; |
1513 | ||
1da177e4 | 1514 | event.info = fb_info; |
256154fb | 1515 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1516 | return 0; |
1517 | } | |
1518 | ||
1519 | ||
1520 | /** | |
1521 | * unregister_framebuffer - releases a frame buffer device | |
1522 | * @fb_info: frame buffer info structure | |
1523 | * | |
1524 | * Unregisters a frame buffer device @fb_info. | |
1525 | * | |
1526 | * Returns negative errno on error, or zero for success. | |
1527 | * | |
cfafca80 JB |
1528 | * This function will also notify the framebuffer console |
1529 | * to release the driver. | |
1530 | * | |
1531 | * This is meant to be called within a driver's module_exit() | |
1532 | * function. If this is called outside module_exit(), ensure | |
1533 | * that the driver implements fb_open() and fb_release() to | |
1534 | * check that no processes are using the device. | |
1da177e4 LT |
1535 | */ |
1536 | ||
1537 | int | |
1538 | unregister_framebuffer(struct fb_info *fb_info) | |
1539 | { | |
e614b18d | 1540 | struct fb_event event; |
cfafca80 | 1541 | int i, ret = 0; |
1da177e4 LT |
1542 | |
1543 | i = fb_info->node; | |
cfafca80 JB |
1544 | if (!registered_fb[i]) { |
1545 | ret = -EINVAL; | |
1546 | goto done; | |
1547 | } | |
1548 | ||
1549 | event.info = fb_info; | |
1550 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
1551 | ||
1552 | if (ret) { | |
1553 | ret = -EINVAL; | |
1554 | goto done; | |
1555 | } | |
1da177e4 | 1556 | |
e614b18d AD |
1557 | if (fb_info->pixmap.addr && |
1558 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1559 | kfree(fb_info->pixmap.addr); |
1560 | fb_destroy_modelist(&fb_info->modelist); | |
1561 | registered_fb[i]=NULL; | |
1562 | num_registered_fb--; | |
78cde088 GKH |
1563 | fb_cleanup_device(fb_info); |
1564 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1565 | event.info = fb_info; |
256154fb | 1566 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
cfafca80 JB |
1567 | done: |
1568 | return ret; | |
1da177e4 LT |
1569 | } |
1570 | ||
1da177e4 LT |
1571 | /** |
1572 | * fb_set_suspend - low level driver signals suspend | |
1573 | * @info: framebuffer affected | |
1574 | * @state: 0 = resuming, !=0 = suspending | |
1575 | * | |
1576 | * This is meant to be used by low level drivers to | |
1577 | * signal suspend/resume to the core & clients. | |
1578 | * It must be called with the console semaphore held | |
1579 | */ | |
1580 | void fb_set_suspend(struct fb_info *info, int state) | |
1581 | { | |
1582 | struct fb_event event; | |
1583 | ||
1584 | event.info = info; | |
1585 | if (state) { | |
256154fb | 1586 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1587 | info->state = FBINFO_STATE_SUSPENDED; |
1588 | } else { | |
1589 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1590 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1591 | } |
1592 | } | |
1593 | ||
1594 | /** | |
1595 | * fbmem_init - init frame buffer subsystem | |
1596 | * | |
1597 | * Initialize the frame buffer subsystem. | |
1598 | * | |
1599 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1600 | * | |
1601 | */ | |
1602 | ||
1603 | static int __init | |
1604 | fbmem_init(void) | |
1605 | { | |
0aa16341 | 1606 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1607 | |
1da177e4 LT |
1608 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1609 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1610 | ||
56b22935 | 1611 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1612 | if (IS_ERR(fb_class)) { |
1613 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1614 | fb_class = NULL; | |
1615 | } | |
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | #ifdef MODULE | |
1620 | module_init(fbmem_init); | |
1621 | static void __exit | |
1622 | fbmem_exit(void) | |
1623 | { | |
c43f89c2 | 1624 | remove_proc_entry("fb", NULL); |
56b22935 | 1625 | class_destroy(fb_class); |
5a340cce | 1626 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1627 | } |
1628 | ||
1629 | module_exit(fbmem_exit); | |
1630 | MODULE_LICENSE("GPL"); | |
1631 | MODULE_DESCRIPTION("Framebuffer base"); | |
1632 | #else | |
1633 | subsys_initcall(fbmem_init); | |
1634 | #endif | |
1635 | ||
1636 | int fb_new_modelist(struct fb_info *info) | |
1637 | { | |
1638 | struct fb_event event; | |
1639 | struct fb_var_screeninfo var = info->var; | |
1640 | struct list_head *pos, *n; | |
1641 | struct fb_modelist *modelist; | |
1642 | struct fb_videomode *m, mode; | |
1643 | int err = 1; | |
1644 | ||
1645 | list_for_each_safe(pos, n, &info->modelist) { | |
1646 | modelist = list_entry(pos, struct fb_modelist, list); | |
1647 | m = &modelist->mode; | |
1648 | fb_videomode_to_var(&var, m); | |
1649 | var.activate = FB_ACTIVATE_TEST; | |
1650 | err = fb_set_var(info, &var); | |
1651 | fb_var_to_videomode(&mode, &var); | |
1652 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1653 | list_del(pos); | |
1654 | kfree(pos); | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | err = 1; | |
1659 | ||
1660 | if (!list_empty(&info->modelist)) { | |
1661 | event.info = info; | |
256154fb | 1662 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1663 | } |
1664 | ||
1665 | return err; | |
1666 | } | |
1667 | ||
0128beee HD |
1668 | static char *video_options[FB_MAX] __read_mostly; |
1669 | static int ofonly __read_mostly; | |
1da177e4 LT |
1670 | |
1671 | /** | |
1672 | * fb_get_options - get kernel boot parameters | |
1673 | * @name: framebuffer name as it would appear in | |
1674 | * the boot parameter line | |
1675 | * (video=<name>:<options>) | |
1676 | * @option: the option will be stored here | |
1677 | * | |
1678 | * NOTE: Needed to maintain backwards compatibility | |
1679 | */ | |
1680 | int fb_get_options(char *name, char **option) | |
1681 | { | |
1682 | char *opt, *options = NULL; | |
1683 | int opt_len, retval = 0; | |
1684 | int name_len = strlen(name), i; | |
1685 | ||
1686 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1687 | retval = 1; | |
1688 | ||
1689 | if (name_len && !retval) { | |
1690 | for (i = 0; i < FB_MAX; i++) { | |
1691 | if (video_options[i] == NULL) | |
1692 | continue; | |
1693 | opt_len = strlen(video_options[i]); | |
1694 | if (!opt_len) | |
1695 | continue; | |
1696 | opt = video_options[i]; | |
1697 | if (!strncmp(name, opt, name_len) && | |
1698 | opt[name_len] == ':') | |
1699 | options = opt + name_len + 1; | |
1700 | } | |
1701 | } | |
1702 | if (options && !strncmp(options, "off", 3)) | |
1703 | retval = 1; | |
1704 | ||
1705 | if (option) | |
1706 | *option = options; | |
1707 | ||
1708 | return retval; | |
1709 | } | |
1710 | ||
bc6d7fdf | 1711 | #ifndef MODULE |
1da177e4 LT |
1712 | /** |
1713 | * video_setup - process command line options | |
1714 | * @options: string of options | |
1715 | * | |
1716 | * Process command line options for frame buffer subsystem. | |
1717 | * | |
1718 | * NOTE: This function is a __setup and __init function. | |
1719 | * It only stores the options. Drivers have to call | |
1720 | * fb_get_options() as necessary. | |
1721 | * | |
1722 | * Returns zero. | |
1723 | * | |
1724 | */ | |
75c96f85 | 1725 | static int __init video_setup(char *options) |
1da177e4 LT |
1726 | { |
1727 | int i, global = 0; | |
1728 | ||
1729 | if (!options || !*options) | |
1730 | global = 1; | |
1731 | ||
1732 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1733 | ofonly = 1; | |
1734 | global = 1; | |
1735 | } | |
1736 | ||
1737 | if (!global && !strstr(options, "fb:")) { | |
9a054fba | 1738 | fb_mode_option = options; |
1da177e4 LT |
1739 | global = 1; |
1740 | } | |
1741 | ||
1742 | if (!global) { | |
1743 | for (i = 0; i < FB_MAX; i++) { | |
1744 | if (video_options[i] == NULL) { | |
1745 | video_options[i] = options; | |
1746 | break; | |
1747 | } | |
1748 | ||
1749 | } | |
1750 | } | |
1751 | ||
9b41046c | 1752 | return 1; |
1da177e4 LT |
1753 | } |
1754 | __setup("video=", video_setup); | |
bc6d7fdf | 1755 | #endif |
1da177e4 LT |
1756 | |
1757 | /* | |
1758 | * Visible symbols for modules | |
1759 | */ | |
1760 | ||
1761 | EXPORT_SYMBOL(register_framebuffer); | |
1762 | EXPORT_SYMBOL(unregister_framebuffer); | |
1763 | EXPORT_SYMBOL(num_registered_fb); | |
1764 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1765 | EXPORT_SYMBOL(fb_show_logo); |
1766 | EXPORT_SYMBOL(fb_set_var); | |
1767 | EXPORT_SYMBOL(fb_blank); | |
1768 | EXPORT_SYMBOL(fb_pan_display); | |
1769 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1770 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1771 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1772 | |
1773 | MODULE_LICENSE("GPL"); |