]>
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 | 48 | |
6a7f2829 AM |
49 | int lock_fb_info(struct fb_info *info) |
50 | { | |
51 | mutex_lock(&info->lock); | |
52 | if (!info->fbops) { | |
53 | mutex_unlock(&info->lock); | |
54 | return 0; | |
55 | } | |
56 | return 1; | |
57 | } | |
58 | EXPORT_SYMBOL(lock_fb_info); | |
59 | ||
1da177e4 LT |
60 | /* |
61 | * Helpers | |
62 | */ | |
63 | ||
b8c90945 AD |
64 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
65 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 66 | { |
b8c90945 AD |
67 | int depth = 0; |
68 | ||
69 | if (fix->visual == FB_VISUAL_MONO01 || | |
70 | fix->visual == FB_VISUAL_MONO10) | |
71 | depth = 1; | |
72 | else { | |
73 | if (var->green.length == var->blue.length && | |
74 | var->green.length == var->red.length && | |
75 | var->green.offset == var->blue.offset && | |
76 | var->green.offset == var->red.offset) | |
77 | depth = var->green.length; | |
78 | else | |
79 | depth = var->green.length + var->red.length + | |
80 | var->blue.length; | |
81 | } | |
82 | ||
83 | return depth; | |
1da177e4 LT |
84 | } |
85 | EXPORT_SYMBOL(fb_get_color_depth); | |
86 | ||
87 | /* | |
f5a9951c | 88 | * Data padding functions. |
1da177e4 | 89 | */ |
f1ab5dac | 90 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 91 | { |
829e79b6 | 92 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 93 | } |
f1ab5dac | 94 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 95 | |
f1ab5dac JS |
96 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
97 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
98 | { |
99 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
100 | int i, j; | |
101 | ||
102 | for (i = height; i--; ) { | |
103 | for (j = 0; j < idx; j++) { | |
104 | tmp = dst[j]; | |
105 | tmp &= mask; | |
106 | tmp |= *src >> shift_low; | |
107 | dst[j] = tmp; | |
108 | tmp = *src << shift_high; | |
109 | dst[j+1] = tmp; | |
110 | src++; | |
111 | } | |
112 | tmp = dst[idx]; | |
113 | tmp &= mask; | |
114 | tmp |= *src >> shift_low; | |
115 | dst[idx] = tmp; | |
116 | if (shift_high < mod) { | |
117 | tmp = *src << shift_high; | |
118 | dst[idx+1] = tmp; | |
119 | } | |
120 | src++; | |
121 | dst += d_pitch; | |
122 | } | |
123 | } | |
f1ab5dac | 124 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
125 | |
126 | /* | |
127 | * we need to lock this section since fb_cursor | |
128 | * may use fb_imageblit() | |
129 | */ | |
130 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
131 | { | |
132 | u32 align = buf->buf_align - 1, offset; | |
133 | char *addr = buf->addr; | |
134 | ||
135 | /* If IO mapped, we need to sync before access, no sharing of | |
136 | * the pixmap is done | |
137 | */ | |
138 | if (buf->flags & FB_PIXMAP_IO) { | |
139 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
140 | info->fbops->fb_sync(info); | |
141 | return addr; | |
142 | } | |
143 | ||
144 | /* See if we fit in the remaining pixmap space */ | |
145 | offset = buf->offset + align; | |
146 | offset &= ~align; | |
147 | if (offset + size > buf->size) { | |
148 | /* We do not fit. In order to be able to re-use the buffer, | |
149 | * we must ensure no asynchronous DMA'ing or whatever operation | |
150 | * is in progress, we sync for that. | |
151 | */ | |
152 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
153 | info->fbops->fb_sync(info); | |
154 | offset = 0; | |
155 | } | |
156 | buf->offset = offset + size; | |
157 | addr += offset; | |
158 | ||
159 | return addr; | |
160 | } | |
161 | ||
162 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
163 | |
164 | static inline unsigned safe_shift(unsigned d, int n) | |
165 | { | |
166 | return n < 0 ? d >> -n : d << n; | |
167 | } | |
168 | ||
169 | static void fb_set_logocmap(struct fb_info *info, | |
170 | const struct linux_logo *logo) | |
171 | { | |
172 | struct fb_cmap palette_cmap; | |
173 | u16 palette_green[16]; | |
174 | u16 palette_blue[16]; | |
175 | u16 palette_red[16]; | |
176 | int i, j, n; | |
177 | const unsigned char *clut = logo->clut; | |
178 | ||
179 | palette_cmap.start = 0; | |
180 | palette_cmap.len = 16; | |
181 | palette_cmap.red = palette_red; | |
182 | palette_cmap.green = palette_green; | |
183 | palette_cmap.blue = palette_blue; | |
184 | palette_cmap.transp = NULL; | |
185 | ||
186 | for (i = 0; i < logo->clutsize; i += n) { | |
187 | n = logo->clutsize - i; | |
188 | /* palette_cmap provides space for only 16 colors at once */ | |
189 | if (n > 16) | |
190 | n = 16; | |
191 | palette_cmap.start = 32 + i; | |
192 | palette_cmap.len = n; | |
193 | for (j = 0; j < n; ++j) { | |
194 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
195 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
196 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
197 | clut += 3; | |
198 | } | |
199 | fb_set_cmap(&palette_cmap, info); | |
200 | } | |
201 | } | |
202 | ||
203 | static void fb_set_logo_truepalette(struct fb_info *info, | |
204 | const struct linux_logo *logo, | |
205 | u32 *palette) | |
206 | { | |
0128beee | 207 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
208 | unsigned char redmask, greenmask, bluemask; |
209 | int redshift, greenshift, blueshift; | |
210 | int i; | |
211 | const unsigned char *clut = logo->clut; | |
212 | ||
213 | /* | |
214 | * We have to create a temporary palette since console palette is only | |
215 | * 16 colors long. | |
216 | */ | |
217 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
218 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
219 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
220 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
221 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
222 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
223 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
224 | ||
225 | for ( i = 0; i < logo->clutsize; i++) { | |
226 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
227 | safe_shift((clut[1] & greenmask), greenshift) | | |
228 | safe_shift((clut[2] & bluemask), blueshift)); | |
229 | clut += 3; | |
230 | } | |
231 | } | |
232 | ||
233 | static void fb_set_logo_directpalette(struct fb_info *info, | |
234 | const struct linux_logo *logo, | |
235 | u32 *palette) | |
236 | { | |
237 | int redshift, greenshift, blueshift; | |
238 | int i; | |
239 | ||
240 | redshift = info->var.red.offset; | |
241 | greenshift = info->var.green.offset; | |
242 | blueshift = info->var.blue.offset; | |
243 | ||
cf7ee554 | 244 | for (i = 32; i < 32 + logo->clutsize; i++) |
1da177e4 LT |
245 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
246 | } | |
247 | ||
248 | static void fb_set_logo(struct fb_info *info, | |
249 | const struct linux_logo *logo, u8 *dst, | |
250 | int depth) | |
251 | { | |
b8c90945 | 252 | int i, j, k; |
1da177e4 | 253 | const u8 *src = logo->data; |
b8c90945 AD |
254 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
255 | u8 fg = 1, d; | |
1da177e4 | 256 | |
1692b37c AD |
257 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
258 | case 1: | |
259 | fg = 1; | |
260 | break; | |
261 | case 2: | |
262 | fg = 3; | |
263 | break; | |
264 | default: | |
1da177e4 | 265 | fg = 7; |
1692b37c AD |
266 | break; |
267 | } | |
1da177e4 | 268 | |
b8c90945 AD |
269 | if (info->fix.visual == FB_VISUAL_MONO01 || |
270 | info->fix.visual == FB_VISUAL_MONO10) | |
271 | fg = ~((u8) (0xfff << info->var.green.length)); | |
272 | ||
1da177e4 LT |
273 | switch (depth) { |
274 | case 4: | |
275 | for (i = 0; i < logo->height; i++) | |
276 | for (j = 0; j < logo->width; src++) { | |
277 | *dst++ = *src >> 4; | |
278 | j++; | |
279 | if (j < logo->width) { | |
280 | *dst++ = *src & 0x0f; | |
281 | j++; | |
282 | } | |
283 | } | |
284 | break; | |
285 | case 1: | |
286 | for (i = 0; i < logo->height; i++) { | |
287 | for (j = 0; j < logo->width; src++) { | |
288 | d = *src ^ xor; | |
289 | for (k = 7; k >= 0; k--) { | |
290 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
291 | j++; | |
292 | } | |
293 | } | |
294 | } | |
295 | break; | |
296 | } | |
297 | } | |
298 | ||
299 | /* | |
300 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
301 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
302 | * the visual format and color depth of the framebuffer, the DAC, the | |
303 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
304 | * | |
305 | * Case 1 - linux_logo_clut224: | |
306 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
307 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
308 | * | |
309 | * For visuals that require color info from the pseudo_palette, we also construct | |
310 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
311 | * will be set. | |
312 | * | |
313 | * Case 2 - linux_logo_vga16: | |
314 | * The number of colors just matches the console colors, thus there is no need | |
315 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
316 | * each byte contains color information for two pixels (upper and lower nibble). | |
317 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
318 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
319 | * | |
320 | * Case 3 - linux_logo_mono: | |
321 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
322 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
323 | * be set to 1. | |
324 | */ | |
325 | static struct logo_data { | |
326 | int depth; | |
327 | int needs_directpalette; | |
328 | int needs_truepalette; | |
329 | int needs_cmapreset; | |
330 | const struct linux_logo *logo; | |
0128beee | 331 | } fb_logo __read_mostly; |
1da177e4 | 332 | |
9c44e5f6 AD |
333 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
334 | { | |
335 | u32 size = width * height, i; | |
336 | ||
337 | out += size - 1; | |
338 | ||
339 | for (i = size; i--; ) | |
340 | *out-- = *in++; | |
341 | } | |
342 | ||
343 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
344 | { | |
f837e6f7 | 345 | int i, j, h = height - 1; |
9c44e5f6 AD |
346 | |
347 | for (i = 0; i < height; i++) | |
348 | for (j = 0; j < width; j++) | |
f837e6f7 | 349 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
350 | } |
351 | ||
352 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
353 | { | |
354 | int i, j, w = width - 1; | |
355 | ||
356 | for (i = 0; i < height; i++) | |
357 | for (j = 0; j < width; j++) | |
358 | out[height * (w - j) + i] = *in++; | |
359 | } | |
360 | ||
361 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
362 | struct fb_image *image, int rotate) | |
363 | { | |
364 | u32 tmp; | |
365 | ||
366 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
367 | fb_rotate_logo_ud(image->data, dst, image->width, |
368 | image->height); | |
abed5d15 GU |
369 | image->dx = info->var.xres - image->width - image->dx; |
370 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 371 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
372 | fb_rotate_logo_cw(image->data, dst, image->width, |
373 | image->height); | |
9c44e5f6 AD |
374 | tmp = image->width; |
375 | image->width = image->height; | |
376 | image->height = tmp; | |
abed5d15 GU |
377 | tmp = image->dy; |
378 | image->dy = image->dx; | |
379 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 380 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
381 | fb_rotate_logo_ccw(image->data, dst, image->width, |
382 | image->height); | |
f837e6f7 AD |
383 | tmp = image->width; |
384 | image->width = image->height; | |
385 | image->height = tmp; | |
abed5d15 GU |
386 | tmp = image->dx; |
387 | image->dx = image->dy; | |
388 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
389 | } |
390 | ||
391 | image->data = dst; | |
392 | } | |
393 | ||
394 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 395 | int rotate, unsigned int num) |
9c44e5f6 | 396 | { |
448d4797 | 397 | unsigned int x; |
9c44e5f6 AD |
398 | |
399 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
400 | for (x = 0; |
401 | x < num && image->dx + image->width <= info->var.xres; | |
402 | x++) { | |
9c44e5f6 | 403 | info->fbops->fb_imageblit(info, image); |
448d4797 | 404 | image->dx += image->width + 8; |
9c44e5f6 AD |
405 | } |
406 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 407 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 408 | info->fbops->fb_imageblit(info, image); |
448d4797 | 409 | image->dx -= image->width + 8; |
9c44e5f6 AD |
410 | } |
411 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
412 | for (x = 0; |
413 | x < num && image->dy + image->height <= info->var.yres; | |
414 | x++) { | |
9c44e5f6 | 415 | info->fbops->fb_imageblit(info, image); |
448d4797 | 416 | image->dy += image->height + 8; |
9c44e5f6 AD |
417 | } |
418 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 419 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 420 | info->fbops->fb_imageblit(info, image); |
448d4797 | 421 | image->dy -= image->height + 8; |
9c44e5f6 AD |
422 | } |
423 | } | |
424 | } | |
425 | ||
90da63e5 GU |
426 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
427 | const struct linux_logo *logo, int y, | |
428 | unsigned int n) | |
1da177e4 LT |
429 | { |
430 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 431 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 432 | struct fb_image image; |
1da177e4 LT |
433 | |
434 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 435 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 436 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
437 | return 0; |
438 | ||
439 | image.depth = 8; | |
90da63e5 | 440 | image.data = logo->data; |
1da177e4 LT |
441 | |
442 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 443 | fb_set_logocmap(info, logo); |
1da177e4 | 444 | |
9900abfb | 445 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
446 | fb_logo.needs_directpalette) { |
447 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
448 | if (palette == NULL) | |
449 | return 0; | |
450 | ||
451 | if (fb_logo.needs_truepalette) | |
90da63e5 | 452 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 453 | else |
90da63e5 | 454 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
455 | |
456 | saved_pseudo_palette = info->pseudo_palette; | |
457 | info->pseudo_palette = palette; | |
458 | } | |
459 | ||
460 | if (fb_logo.depth <= 4) { | |
90da63e5 | 461 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
462 | if (logo_new == NULL) { |
463 | kfree(palette); | |
464 | if (saved_pseudo_palette) | |
465 | info->pseudo_palette = saved_pseudo_palette; | |
466 | return 0; | |
467 | } | |
468 | image.data = logo_new; | |
90da63e5 | 469 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
470 | } |
471 | ||
9c44e5f6 | 472 | image.dx = 0; |
90da63e5 GU |
473 | image.dy = y; |
474 | image.width = logo->width; | |
475 | image.height = logo->height; | |
1da177e4 | 476 | |
9c44e5f6 | 477 | if (rotate) { |
90da63e5 GU |
478 | logo_rotate = kmalloc(logo->width * |
479 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
480 | if (logo_rotate) |
481 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 482 | } |
9c44e5f6 | 483 | |
90da63e5 | 484 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 485 | |
1da177e4 LT |
486 | kfree(palette); |
487 | if (saved_pseudo_palette != NULL) | |
488 | info->pseudo_palette = saved_pseudo_palette; | |
489 | kfree(logo_new); | |
9c44e5f6 | 490 | kfree(logo_rotate); |
90da63e5 GU |
491 | return logo->height; |
492 | } | |
493 | ||
9900abfb GU |
494 | |
495 | #ifdef CONFIG_FB_LOGO_EXTRA | |
496 | ||
497 | #define FB_LOGO_EX_NUM_MAX 10 | |
498 | static struct logo_data_extra { | |
499 | const struct linux_logo *logo; | |
500 | unsigned int n; | |
501 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
502 | static unsigned int fb_logo_ex_num; | |
503 | ||
504 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
505 | { | |
506 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
507 | return; | |
508 | ||
509 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
510 | fb_logo_ex[fb_logo_ex_num].n = n; | |
511 | fb_logo_ex_num++; | |
512 | } | |
513 | ||
514 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
515 | unsigned int yres) | |
516 | { | |
517 | unsigned int i; | |
518 | ||
519 | /* FIXME: logo_ex supports only truecolor fb. */ | |
520 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
521 | fb_logo_ex_num = 0; | |
522 | ||
523 | for (i = 0; i < fb_logo_ex_num; i++) { | |
4fb6de25 GU |
524 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
525 | fb_logo_ex[i].logo = NULL; | |
526 | continue; | |
527 | } | |
9900abfb GU |
528 | height += fb_logo_ex[i].logo->height; |
529 | if (height > yres) { | |
530 | height -= fb_logo_ex[i].logo->height; | |
531 | fb_logo_ex_num = i; | |
532 | break; | |
533 | } | |
534 | } | |
535 | return height; | |
536 | } | |
537 | ||
538 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
539 | { | |
540 | unsigned int i; | |
541 | ||
542 | for (i = 0; i < fb_logo_ex_num; i++) | |
543 | y += fb_show_logo_line(info, rotate, | |
544 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
545 | ||
546 | return y; | |
547 | } | |
548 | ||
549 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
550 | ||
551 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
552 | unsigned int height, | |
553 | unsigned int yres) | |
554 | { | |
555 | return height; | |
556 | } | |
557 | ||
558 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
559 | { | |
560 | return y; | |
561 | } | |
562 | ||
563 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
564 | ||
565 | ||
566 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
567 | { | |
568 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
569 | unsigned int yres; | |
570 | ||
571 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
572 | ||
573 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
574 | info->flags & FBINFO_MODULE) | |
575 | return 0; | |
576 | ||
577 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
578 | depth = info->var.blue.length; | |
579 | if (info->var.red.length < depth) | |
580 | depth = info->var.red.length; | |
581 | if (info->var.green.length < depth) | |
582 | depth = info->var.green.length; | |
583 | } | |
584 | ||
585 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
586 | /* assume console colormap */ | |
587 | depth = 4; | |
588 | } | |
589 | ||
9900abfb GU |
590 | /* Return if no suitable logo was found */ |
591 | fb_logo.logo = fb_find_logo(depth); | |
592 | ||
593 | if (!fb_logo.logo) { | |
594 | return 0; | |
595 | } | |
596 | ||
597 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
598 | yres = info->var.yres; | |
599 | else | |
600 | yres = info->var.xres; | |
601 | ||
602 | if (fb_logo.logo->height > yres) { | |
603 | fb_logo.logo = NULL; | |
604 | return 0; | |
605 | } | |
606 | ||
607 | /* What depth we asked for might be different from what we get */ | |
608 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
609 | fb_logo.depth = 8; | |
610 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
611 | fb_logo.depth = 4; | |
612 | else | |
613 | fb_logo.depth = 1; | |
614 | ||
1692b37c AD |
615 | |
616 | if (fb_logo.depth > 4 && depth > 4) { | |
617 | switch (info->fix.visual) { | |
618 | case FB_VISUAL_TRUECOLOR: | |
619 | fb_logo.needs_truepalette = 1; | |
620 | break; | |
621 | case FB_VISUAL_DIRECTCOLOR: | |
622 | fb_logo.needs_directpalette = 1; | |
623 | fb_logo.needs_cmapreset = 1; | |
624 | break; | |
625 | case FB_VISUAL_PSEUDOCOLOR: | |
626 | fb_logo.needs_cmapreset = 1; | |
627 | break; | |
628 | } | |
629 | } | |
630 | ||
9900abfb GU |
631 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
632 | } | |
633 | ||
90da63e5 GU |
634 | int fb_show_logo(struct fb_info *info, int rotate) |
635 | { | |
9900abfb GU |
636 | int y; |
637 | ||
638 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
639 | num_online_cpus()); | |
640 | y = fb_show_extra_logos(info, y, rotate); | |
641 | ||
642 | return y; | |
1da177e4 LT |
643 | } |
644 | #else | |
9c44e5f6 AD |
645 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
646 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
647 | #endif /* CONFIG_LOGO */ |
648 | ||
0aa16341 AD |
649 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
650 | { | |
651 | return (*pos < FB_MAX) ? pos : NULL; | |
652 | } | |
653 | ||
654 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
655 | { | |
656 | (*pos)++; | |
657 | return (*pos < FB_MAX) ? pos : NULL; | |
658 | } | |
659 | ||
660 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 661 | { |
1da177e4 LT |
662 | } |
663 | ||
0aa16341 AD |
664 | static int fb_seq_show(struct seq_file *m, void *v) |
665 | { | |
666 | int i = *(loff_t *)v; | |
667 | struct fb_info *fi = registered_fb[i]; | |
668 | ||
669 | if (fi) | |
670 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
671 | return 0; | |
672 | } | |
673 | ||
674 | static const struct seq_operations proc_fb_seq_ops = { | |
675 | .start = fb_seq_start, | |
676 | .next = fb_seq_next, | |
677 | .stop = fb_seq_stop, | |
678 | .show = fb_seq_show, | |
679 | }; | |
680 | ||
681 | static int proc_fb_open(struct inode *inode, struct file *file) | |
682 | { | |
683 | return seq_open(file, &proc_fb_seq_ops); | |
684 | } | |
685 | ||
686 | static const struct file_operations fb_proc_fops = { | |
687 | .owner = THIS_MODULE, | |
688 | .open = proc_fb_open, | |
689 | .read = seq_read, | |
690 | .llseek = seq_lseek, | |
691 | .release = seq_release, | |
692 | }; | |
693 | ||
1da177e4 LT |
694 | static ssize_t |
695 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
696 | { | |
697 | unsigned long p = *ppos; | |
ad9a824e | 698 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
699 | int fbidx = iminor(inode); |
700 | struct fb_info *info = registered_fb[fbidx]; | |
701 | u32 *buffer, *dst; | |
702 | u32 __iomem *src; | |
703 | int c, i, cnt = 0, err = 0; | |
704 | unsigned long total_size; | |
705 | ||
706 | if (!info || ! info->screen_base) | |
707 | return -ENODEV; | |
708 | ||
709 | if (info->state != FBINFO_STATE_RUNNING) | |
710 | return -EPERM; | |
711 | ||
712 | if (info->fbops->fb_read) | |
3f9b0880 | 713 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
714 | |
715 | total_size = info->screen_size; | |
0a484a3a | 716 | |
1da177e4 LT |
717 | if (total_size == 0) |
718 | total_size = info->fix.smem_len; | |
719 | ||
720 | if (p >= total_size) | |
0a484a3a AD |
721 | return 0; |
722 | ||
1da177e4 | 723 | if (count >= total_size) |
0a484a3a AD |
724 | count = total_size; |
725 | ||
1da177e4 LT |
726 | if (count + p > total_size) |
727 | count = total_size - p; | |
728 | ||
1da177e4 LT |
729 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
730 | GFP_KERNEL); | |
731 | if (!buffer) | |
732 | return -ENOMEM; | |
733 | ||
734 | src = (u32 __iomem *) (info->screen_base + p); | |
735 | ||
736 | if (info->fbops->fb_sync) | |
737 | info->fbops->fb_sync(info); | |
738 | ||
739 | while (count) { | |
740 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
741 | dst = buffer; | |
742 | for (i = c >> 2; i--; ) | |
743 | *dst++ = fb_readl(src++); | |
744 | if (c & 3) { | |
745 | u8 *dst8 = (u8 *) dst; | |
746 | u8 __iomem *src8 = (u8 __iomem *) src; | |
747 | ||
748 | for (i = c & 3; i--;) | |
749 | *dst8++ = fb_readb(src8++); | |
750 | ||
751 | src = (u32 __iomem *) src8; | |
752 | } | |
753 | ||
754 | if (copy_to_user(buf, buffer, c)) { | |
755 | err = -EFAULT; | |
756 | break; | |
757 | } | |
758 | *ppos += c; | |
759 | buf += c; | |
760 | cnt += c; | |
761 | count -= c; | |
762 | } | |
763 | ||
764 | kfree(buffer); | |
0a484a3a | 765 | |
1da177e4 LT |
766 | return (err) ? err : cnt; |
767 | } | |
768 | ||
769 | static ssize_t | |
770 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
771 | { | |
772 | unsigned long p = *ppos; | |
ad9a824e | 773 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
774 | int fbidx = iminor(inode); |
775 | struct fb_info *info = registered_fb[fbidx]; | |
776 | u32 *buffer, *src; | |
777 | u32 __iomem *dst; | |
0a484a3a | 778 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
779 | unsigned long total_size; |
780 | ||
781 | if (!info || !info->screen_base) | |
782 | return -ENODEV; | |
783 | ||
784 | if (info->state != FBINFO_STATE_RUNNING) | |
785 | return -EPERM; | |
786 | ||
787 | if (info->fbops->fb_write) | |
3f9b0880 | 788 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
789 | |
790 | total_size = info->screen_size; | |
0a484a3a | 791 | |
1da177e4 LT |
792 | if (total_size == 0) |
793 | total_size = info->fix.smem_len; | |
794 | ||
795 | if (p > total_size) | |
6a2a8866 | 796 | return -EFBIG; |
0a484a3a | 797 | |
6a2a8866 AD |
798 | if (count > total_size) { |
799 | err = -EFBIG; | |
0a484a3a | 800 | count = total_size; |
6a2a8866 AD |
801 | } |
802 | ||
803 | if (count + p > total_size) { | |
804 | if (!err) | |
805 | err = -ENOSPC; | |
0a484a3a | 806 | |
0a484a3a | 807 | count = total_size - p; |
6a2a8866 | 808 | } |
0a484a3a | 809 | |
1da177e4 LT |
810 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
811 | GFP_KERNEL); | |
812 | if (!buffer) | |
813 | return -ENOMEM; | |
814 | ||
815 | dst = (u32 __iomem *) (info->screen_base + p); | |
816 | ||
817 | if (info->fbops->fb_sync) | |
818 | info->fbops->fb_sync(info); | |
819 | ||
820 | while (count) { | |
821 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
822 | src = buffer; | |
0a484a3a | 823 | |
1da177e4 LT |
824 | if (copy_from_user(src, buf, c)) { |
825 | err = -EFAULT; | |
826 | break; | |
827 | } | |
0a484a3a | 828 | |
1da177e4 LT |
829 | for (i = c >> 2; i--; ) |
830 | fb_writel(*src++, dst++); | |
0a484a3a | 831 | |
1da177e4 LT |
832 | if (c & 3) { |
833 | u8 *src8 = (u8 *) src; | |
834 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
835 | ||
836 | for (i = c & 3; i--; ) | |
837 | fb_writeb(*src8++, dst8++); | |
838 | ||
839 | dst = (u32 __iomem *) dst8; | |
840 | } | |
0a484a3a | 841 | |
1da177e4 LT |
842 | *ppos += c; |
843 | buf += c; | |
844 | cnt += c; | |
845 | count -= c; | |
846 | } | |
0a484a3a | 847 | |
1da177e4 LT |
848 | kfree(buffer); |
849 | ||
6a2a8866 | 850 | return (cnt) ? cnt : err; |
1da177e4 LT |
851 | } |
852 | ||
1da177e4 LT |
853 | int |
854 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
855 | { | |
1207069f | 856 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
857 | unsigned int yres = info->var.yres; |
858 | int err = 0; | |
1207069f AD |
859 | |
860 | if (var->yoffset > 0) { | |
861 | if (var->vmode & FB_VMODE_YWRAP) { | |
862 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
863 | err = -EINVAL; | |
864 | else | |
865 | yres = 0; | |
866 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
867 | err = -EINVAL; | |
868 | } | |
869 | ||
870 | if (var->xoffset > 0 && (!fix->xpanstep || | |
871 | (var->xoffset % fix->xpanstep))) | |
872 | err = -EINVAL; | |
873 | ||
7572a1ea VS |
874 | if (err || !info->fbops->fb_pan_display || |
875 | var->yoffset + yres > info->var.yres_virtual || | |
1207069f AD |
876 | var->xoffset + info->var.xres > info->var.xres_virtual) |
877 | return -EINVAL; | |
1da177e4 | 878 | |
1da177e4 LT |
879 | if ((err = info->fbops->fb_pan_display(var, info))) |
880 | return err; | |
881 | info->var.xoffset = var->xoffset; | |
882 | info->var.yoffset = var->yoffset; | |
883 | if (var->vmode & FB_VMODE_YWRAP) | |
884 | info->var.vmode |= FB_VMODE_YWRAP; | |
885 | else | |
886 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
887 | return 0; | |
888 | } | |
889 | ||
38a3dc51 AD |
890 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
891 | u32 activate) | |
892 | { | |
893 | struct fb_event event; | |
894 | struct fb_blit_caps caps, fbcaps; | |
895 | int err = 0; | |
896 | ||
897 | memset(&caps, 0, sizeof(caps)); | |
898 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
899 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
900 | event.info = info; | |
901 | event.data = ∩︀ | |
902 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
903 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
904 | ||
905 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
906 | ((fbcaps.y ^ caps.y) & caps.y) || | |
907 | (fbcaps.len < caps.len)) | |
908 | err = -EINVAL; | |
909 | ||
910 | return err; | |
911 | } | |
912 | ||
1da177e4 LT |
913 | int |
914 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
915 | { | |
b1e7223f AD |
916 | int flags = info->flags; |
917 | int ret = 0; | |
1da177e4 LT |
918 | |
919 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
920 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
921 | |
922 | fb_var_to_videomode(&mode1, var); | |
923 | fb_var_to_videomode(&mode2, &info->var); | |
924 | /* make sure we don't delete the videomode of current var */ | |
925 | ret = fb_mode_is_equal(&mode1, &mode2); | |
926 | ||
927 | if (!ret) { | |
928 | struct fb_event event; | |
929 | ||
930 | event.info = info; | |
931 | event.data = &mode1; | |
256154fb | 932 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
933 | } |
934 | ||
935 | if (!ret) | |
936 | fb_delete_videomode(&mode1, &info->modelist); | |
937 | ||
b1e7223f AD |
938 | |
939 | ret = (ret) ? -EINVAL : 0; | |
940 | goto done; | |
1da177e4 LT |
941 | } |
942 | ||
943 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
944 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
945 | u32 activate = var->activate; |
946 | ||
1da177e4 LT |
947 | if (!info->fbops->fb_check_var) { |
948 | *var = info->var; | |
b1e7223f | 949 | goto done; |
1da177e4 LT |
950 | } |
951 | ||
b1e7223f AD |
952 | ret = info->fbops->fb_check_var(var, info); |
953 | ||
954 | if (ret) | |
955 | goto done; | |
1da177e4 LT |
956 | |
957 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
958 | struct fb_videomode mode; | |
1da177e4 | 959 | |
38a3dc51 | 960 | if (info->fbops->fb_get_caps) { |
b1e7223f | 961 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 962 | |
b1e7223f | 963 | if (ret) |
38a3dc51 AD |
964 | goto done; |
965 | } | |
966 | ||
1da177e4 | 967 | info->var = *var; |
38a3dc51 | 968 | |
1da177e4 LT |
969 | if (info->fbops->fb_set_par) |
970 | info->fbops->fb_set_par(info); | |
971 | ||
972 | fb_pan_display(info, &info->var); | |
1da177e4 | 973 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
974 | fb_var_to_videomode(&mode, &info->var); |
975 | ||
976 | if (info->modelist.prev && info->modelist.next && | |
977 | !list_empty(&info->modelist)) | |
b1e7223f | 978 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 979 | |
b1e7223f | 980 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 981 | struct fb_event event; |
4941cb7a | 982 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
983 | FB_EVENT_MODE_CHANGE_ALL : |
984 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
985 | |
986 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
987 | event.info = info; | |
faa312da | 988 | event.data = &mode; |
256154fb | 989 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
990 | } |
991 | } | |
992 | } | |
38a3dc51 AD |
993 | |
994 | done: | |
b1e7223f | 995 | return ret; |
1da177e4 LT |
996 | } |
997 | ||
998 | int | |
999 | fb_blank(struct fb_info *info, int blank) | |
1000 | { | |
1001 | int ret = -EINVAL; | |
1002 | ||
1003 | if (blank > FB_BLANK_POWERDOWN) | |
1004 | blank = FB_BLANK_POWERDOWN; | |
1005 | ||
1006 | if (info->fbops->fb_blank) | |
1007 | ret = info->fbops->fb_blank(blank, info); | |
1008 | ||
1009 | if (!ret) { | |
1010 | struct fb_event event; | |
1011 | ||
1012 | event.info = info; | |
1013 | event.data = ␣ | |
256154fb | 1014 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | return ret; | |
1018 | } | |
1019 | ||
a684e7d3 GU |
1020 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1021 | unsigned long arg) | |
1da177e4 | 1022 | { |
e5367711 | 1023 | struct fb_ops *fb; |
1da177e4 LT |
1024 | struct fb_var_screeninfo var; |
1025 | struct fb_fix_screeninfo fix; | |
1026 | struct fb_con2fbmap con2fb; | |
1f5e31d7 | 1027 | struct fb_cmap cmap_from; |
1da177e4 LT |
1028 | struct fb_cmap_user cmap; |
1029 | struct fb_event event; | |
1030 | void __user *argp = (void __user *)arg; | |
e5367711 AC |
1031 | long ret = 0; |
1032 | ||
1da177e4 LT |
1033 | switch (cmd) { |
1034 | case FBIOGET_VSCREENINFO: | |
1f5e31d7 AR |
1035 | if (!lock_fb_info(info)) |
1036 | return -ENODEV; | |
1037 | var = info->var; | |
1038 | unlock_fb_info(info); | |
1039 | ||
1040 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; | |
e5367711 | 1041 | break; |
1da177e4 | 1042 | case FBIOPUT_VSCREENINFO: |
1f5e31d7 AR |
1043 | if (copy_from_user(&var, argp, sizeof(var))) |
1044 | return -EFAULT; | |
1045 | if (!lock_fb_info(info)) | |
1046 | return -ENODEV; | |
1da177e4 LT |
1047 | acquire_console_sem(); |
1048 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1049 | ret = fb_set_var(info, &var); |
1da177e4 LT |
1050 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1051 | release_console_sem(); | |
1f5e31d7 AR |
1052 | unlock_fb_info(info); |
1053 | if (!ret && copy_to_user(argp, &var, sizeof(var))) | |
e5367711 AC |
1054 | ret = -EFAULT; |
1055 | break; | |
1da177e4 | 1056 | case FBIOGET_FSCREENINFO: |
1f5e31d7 AR |
1057 | if (!lock_fb_info(info)) |
1058 | return -ENODEV; | |
1059 | fix = info->fix; | |
1060 | unlock_fb_info(info); | |
1061 | ||
1062 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; | |
e5367711 | 1063 | break; |
1da177e4 LT |
1064 | case FBIOPUTCMAP: |
1065 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1066 | return -EFAULT; |
1067 | ret = fb_set_user_cmap(&cmap, info); | |
e5367711 | 1068 | break; |
1da177e4 LT |
1069 | case FBIOGETCMAP: |
1070 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1071 | return -EFAULT; |
1072 | if (!lock_fb_info(info)) | |
1073 | return -ENODEV; | |
1074 | cmap_from = info->cmap; | |
1075 | unlock_fb_info(info); | |
1076 | ret = fb_cmap_to_user(&cmap_from, &cmap); | |
e5367711 | 1077 | break; |
1da177e4 | 1078 | case FBIOPAN_DISPLAY: |
1f5e31d7 AR |
1079 | if (copy_from_user(&var, argp, sizeof(var))) |
1080 | return -EFAULT; | |
1081 | if (!lock_fb_info(info)) | |
1082 | return -ENODEV; | |
1da177e4 | 1083 | acquire_console_sem(); |
e5367711 | 1084 | ret = fb_pan_display(info, &var); |
1da177e4 | 1085 | release_console_sem(); |
1f5e31d7 | 1086 | unlock_fb_info(info); |
e5367711 | 1087 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1f5e31d7 | 1088 | return -EFAULT; |
e5367711 | 1089 | break; |
1da177e4 | 1090 | case FBIO_CURSOR: |
e5367711 AC |
1091 | ret = -EINVAL; |
1092 | break; | |
1da177e4 LT |
1093 | case FBIOGET_CON2FBMAP: |
1094 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1f5e31d7 AR |
1095 | return -EFAULT; |
1096 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1097 | return -EINVAL; | |
1098 | con2fb.framebuffer = -1; | |
1099 | event.data = &con2fb; | |
513adb58 AR |
1100 | if (!lock_fb_info(info)) |
1101 | return -ENODEV; | |
1f5e31d7 AR |
1102 | event.info = info; |
1103 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); | |
513adb58 | 1104 | unlock_fb_info(info); |
1f5e31d7 | 1105 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
e5367711 | 1106 | break; |
1da177e4 | 1107 | case FBIOPUT_CON2FBMAP: |
1f5e31d7 AR |
1108 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1109 | return -EFAULT; | |
1110 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1111 | return -EINVAL; | |
1112 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
1113 | return -EINVAL; | |
1da177e4 | 1114 | if (!registered_fb[con2fb.framebuffer]) |
e5367711 AC |
1115 | request_module("fb%d", con2fb.framebuffer); |
1116 | if (!registered_fb[con2fb.framebuffer]) { | |
1117 | ret = -EINVAL; | |
1118 | break; | |
1119 | } | |
1da177e4 | 1120 | event.data = &con2fb; |
513adb58 AR |
1121 | if (!lock_fb_info(info)) |
1122 | return -ENODEV; | |
1f5e31d7 | 1123 | event.info = info; |
66c1ca01 | 1124 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
513adb58 | 1125 | unlock_fb_info(info); |
e5367711 | 1126 | break; |
1da177e4 | 1127 | case FBIOBLANK: |
1f5e31d7 AR |
1128 | if (!lock_fb_info(info)) |
1129 | return -ENODEV; | |
1da177e4 LT |
1130 | acquire_console_sem(); |
1131 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1132 | ret = fb_blank(info, arg); |
1da177e4 LT |
1133 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1134 | release_console_sem(); | |
1f5e31d7 AR |
1135 | unlock_fb_info(info); |
1136 | break; | |
1da177e4 | 1137 | default: |
1f5e31d7 AR |
1138 | if (!lock_fb_info(info)) |
1139 | return -ENODEV; | |
1140 | fb = info->fbops; | |
1141 | if (fb->fb_ioctl) | |
e5367711 | 1142 | ret = fb->fb_ioctl(info, cmd, arg); |
1f5e31d7 AR |
1143 | else |
1144 | ret = -ENOTTY; | |
1145 | unlock_fb_info(info); | |
1da177e4 | 1146 | } |
a684e7d3 GU |
1147 | return ret; |
1148 | } | |
1149 | ||
1150 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
a684e7d3 GU |
1151 | { |
1152 | struct inode *inode = file->f_path.dentry->d_inode; | |
1153 | int fbidx = iminor(inode); | |
1f5e31d7 | 1154 | struct fb_info *info = registered_fb[fbidx]; |
a684e7d3 | 1155 | |
1f5e31d7 | 1156 | return do_fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1160 | struct fb_fix_screeninfo32 { |
1161 | char id[16]; | |
1162 | compat_caddr_t smem_start; | |
1163 | u32 smem_len; | |
1164 | u32 type; | |
1165 | u32 type_aux; | |
1166 | u32 visual; | |
1167 | u16 xpanstep; | |
1168 | u16 ypanstep; | |
1169 | u16 ywrapstep; | |
1170 | u32 line_length; | |
1171 | compat_caddr_t mmio_start; | |
1172 | u32 mmio_len; | |
1173 | u32 accel; | |
1174 | u16 reserved[3]; | |
1175 | }; | |
1176 | ||
1177 | struct fb_cmap32 { | |
1178 | u32 start; | |
1179 | u32 len; | |
1180 | compat_caddr_t red; | |
1181 | compat_caddr_t green; | |
1182 | compat_caddr_t blue; | |
1183 | compat_caddr_t transp; | |
1184 | }; | |
1185 | ||
a684e7d3 GU |
1186 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1187 | unsigned long arg) | |
c7f82d9c AB |
1188 | { |
1189 | struct fb_cmap_user __user *cmap; | |
1190 | struct fb_cmap32 __user *cmap32; | |
1191 | __u32 data; | |
1192 | int err; | |
1193 | ||
1194 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1195 | cmap32 = compat_ptr(arg); | |
1196 | ||
1197 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1198 | return -EFAULT; | |
1199 | ||
1200 | if (get_user(data, &cmap32->red) || | |
1201 | put_user(compat_ptr(data), &cmap->red) || | |
1202 | get_user(data, &cmap32->green) || | |
1203 | put_user(compat_ptr(data), &cmap->green) || | |
1204 | get_user(data, &cmap32->blue) || | |
1205 | put_user(compat_ptr(data), &cmap->blue) || | |
1206 | get_user(data, &cmap32->transp) || | |
1207 | put_user(compat_ptr(data), &cmap->transp)) | |
1208 | return -EFAULT; | |
1209 | ||
a684e7d3 | 1210 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
c7f82d9c AB |
1211 | |
1212 | if (!err) { | |
1213 | if (copy_in_user(&cmap32->start, | |
1214 | &cmap->start, | |
1215 | 2 * sizeof(__u32))) | |
1216 | err = -EFAULT; | |
1217 | } | |
1218 | return err; | |
1219 | } | |
1220 | ||
1221 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1222 | struct fb_fix_screeninfo32 __user *fix32) | |
1223 | { | |
1224 | __u32 data; | |
1225 | int err; | |
1226 | ||
1227 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1228 | ||
1229 | data = (__u32) (unsigned long) fix->smem_start; | |
1230 | err |= put_user(data, &fix32->smem_start); | |
1231 | ||
1232 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1233 | err |= put_user(fix->type, &fix32->type); | |
1234 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1235 | err |= put_user(fix->visual, &fix32->visual); | |
1236 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1237 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1238 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1239 | err |= put_user(fix->line_length, &fix32->line_length); | |
1240 | ||
1241 | data = (__u32) (unsigned long) fix->mmio_start; | |
1242 | err |= put_user(data, &fix32->mmio_start); | |
1243 | ||
1244 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1245 | err |= put_user(fix->accel, &fix32->accel); | |
1246 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1247 | sizeof(fix->reserved)); | |
1248 | ||
1249 | return err; | |
1250 | } | |
1251 | ||
a684e7d3 GU |
1252 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1253 | unsigned long arg) | |
c7f82d9c AB |
1254 | { |
1255 | mm_segment_t old_fs; | |
1256 | struct fb_fix_screeninfo fix; | |
1257 | struct fb_fix_screeninfo32 __user *fix32; | |
1258 | int err; | |
1259 | ||
1260 | fix32 = compat_ptr(arg); | |
1261 | ||
1262 | old_fs = get_fs(); | |
1263 | set_fs(KERNEL_DS); | |
a684e7d3 | 1264 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
c7f82d9c AB |
1265 | set_fs(old_fs); |
1266 | ||
1267 | if (!err) | |
1268 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1269 | ||
1270 | return err; | |
1271 | } | |
1272 | ||
a684e7d3 GU |
1273 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1274 | unsigned long arg) | |
1da177e4 | 1275 | { |
ad9a824e | 1276 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1277 | int fbidx = iminor(inode); |
1da177e4 LT |
1278 | struct fb_info *info = registered_fb[fbidx]; |
1279 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1280 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1281 | |
c7f82d9c AB |
1282 | switch(cmd) { |
1283 | case FBIOGET_VSCREENINFO: | |
1284 | case FBIOPUT_VSCREENINFO: | |
1285 | case FBIOPAN_DISPLAY: | |
1286 | case FBIOGET_CON2FBMAP: | |
1287 | case FBIOPUT_CON2FBMAP: | |
1288 | arg = (unsigned long) compat_ptr(arg); | |
1289 | case FBIOBLANK: | |
a684e7d3 GU |
1290 | ret = do_fb_ioctl(info, cmd, arg); |
1291 | break; | |
c7f82d9c AB |
1292 | |
1293 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1294 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1295 | break; |
1296 | ||
1297 | case FBIOGETCMAP: | |
1298 | case FBIOPUTCMAP: | |
a684e7d3 | 1299 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1300 | break; |
1301 | ||
1302 | default: | |
1303 | if (fb->fb_compat_ioctl) | |
67a6680d | 1304 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1305 | break; |
1306 | } | |
1da177e4 LT |
1307 | return ret; |
1308 | } | |
1309 | #endif | |
1310 | ||
10eb2659 | 1311 | static int |
1da177e4 | 1312 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
a684e7d3 GU |
1313 | __acquires(&info->lock) |
1314 | __releases(&info->lock) | |
1da177e4 | 1315 | { |
ad9a824e | 1316 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1317 | struct fb_info *info = registered_fb[fbidx]; |
1318 | struct fb_ops *fb = info->fbops; | |
1319 | unsigned long off; | |
1da177e4 LT |
1320 | unsigned long start; |
1321 | u32 len; | |
1da177e4 LT |
1322 | |
1323 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1324 | return -EINVAL; | |
1325 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1326 | if (!fb) | |
1327 | return -ENODEV; | |
1328 | if (fb->fb_mmap) { | |
1329 | int res; | |
3e680aae | 1330 | mutex_lock(&info->lock); |
216d526c | 1331 | res = fb->fb_mmap(info, vma); |
3e680aae | 1332 | mutex_unlock(&info->lock); |
1da177e4 LT |
1333 | return res; |
1334 | } | |
1335 | ||
3e680aae | 1336 | mutex_lock(&info->lock); |
1da177e4 LT |
1337 | |
1338 | /* frame buffer memory */ | |
1339 | start = info->fix.smem_start; | |
1340 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1341 | if (off >= len) { | |
1342 | /* memory mapped io */ | |
1343 | off -= len; | |
1344 | if (info->var.accel_flags) { | |
3e680aae | 1345 | mutex_unlock(&info->lock); |
1da177e4 LT |
1346 | return -EINVAL; |
1347 | } | |
1348 | start = info->fix.mmio_start; | |
1349 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1350 | } | |
3e680aae | 1351 | mutex_unlock(&info->lock); |
1da177e4 LT |
1352 | start &= PAGE_MASK; |
1353 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1354 | return -EINVAL; | |
1355 | off += start; | |
1356 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1357 | /* This is an IO map - tell maydump to skip this VMA */ | |
1358 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1359 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1360 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1361 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1362 | return -EAGAIN; | |
1da177e4 | 1363 | return 0; |
1da177e4 LT |
1364 | } |
1365 | ||
1366 | static int | |
1367 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1368 | __acquires(&info->lock) |
1369 | __releases(&info->lock) | |
1da177e4 LT |
1370 | { |
1371 | int fbidx = iminor(inode); | |
1372 | struct fb_info *info; | |
1373 | int res = 0; | |
1374 | ||
1375 | if (fbidx >= FB_MAX) | |
1376 | return -ENODEV; | |
3e680aae KH |
1377 | info = registered_fb[fbidx]; |
1378 | if (!info) | |
a65e5d78 | 1379 | request_module("fb%d", fbidx); |
3e680aae KH |
1380 | info = registered_fb[fbidx]; |
1381 | if (!info) | |
1382 | return -ENODEV; | |
1383 | mutex_lock(&info->lock); | |
fc7f687a JC |
1384 | if (!try_module_get(info->fbops->owner)) { |
1385 | res = -ENODEV; | |
1386 | goto out; | |
1387 | } | |
cae8a12f | 1388 | file->private_data = info; |
1da177e4 LT |
1389 | if (info->fbops->fb_open) { |
1390 | res = info->fbops->fb_open(info,1); | |
1391 | if (res) | |
1392 | module_put(info->fbops->owner); | |
1393 | } | |
d847471d IC |
1394 | #ifdef CONFIG_FB_DEFERRED_IO |
1395 | if (info->fbdefio) | |
1396 | fb_deferred_io_open(info, inode, file); | |
1397 | #endif | |
fc7f687a | 1398 | out: |
3e680aae | 1399 | mutex_unlock(&info->lock); |
1da177e4 LT |
1400 | return res; |
1401 | } | |
1402 | ||
1403 | static int | |
1404 | fb_release(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1405 | __acquires(&info->lock) |
1406 | __releases(&info->lock) | |
1da177e4 | 1407 | { |
cae8a12f | 1408 | struct fb_info * const info = file->private_data; |
1da177e4 | 1409 | |
3e680aae | 1410 | mutex_lock(&info->lock); |
1da177e4 LT |
1411 | if (info->fbops->fb_release) |
1412 | info->fbops->fb_release(info,1); | |
1413 | module_put(info->fbops->owner); | |
3e680aae | 1414 | mutex_unlock(&info->lock); |
1da177e4 LT |
1415 | return 0; |
1416 | } | |
1417 | ||
0128beee | 1418 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1419 | .owner = THIS_MODULE, |
1420 | .read = fb_read, | |
1421 | .write = fb_write, | |
e5367711 | 1422 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1423 | #ifdef CONFIG_COMPAT |
1424 | .compat_ioctl = fb_compat_ioctl, | |
1425 | #endif | |
1426 | .mmap = fb_mmap, | |
1427 | .open = fb_open, | |
1428 | .release = fb_release, | |
1429 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1430 | .get_unmapped_area = get_fb_unmapped_area, | |
1431 | #endif | |
5e841b88 PM |
1432 | #ifdef CONFIG_FB_DEFERRED_IO |
1433 | .fsync = fb_deferred_io_fsync, | |
1434 | #endif | |
1da177e4 LT |
1435 | }; |
1436 | ||
9a179176 AD |
1437 | struct class *fb_class; |
1438 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1439 | |
1440 | static int fb_check_foreignness(struct fb_info *fi) | |
1441 | { | |
1442 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1443 | ||
1444 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1445 | ||
1446 | #ifdef __BIG_ENDIAN | |
1447 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1448 | #else | |
1449 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1450 | #endif /* __BIG_ENDIAN */ | |
1451 | ||
1452 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1453 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1454 | "support this framebuffer\n", fi->fix.id); | |
1455 | return -ENOSYS; | |
1456 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1457 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1458 | "support this framebuffer\n", fi->fix.id); | |
1459 | return -ENOSYS; | |
1460 | } | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1da177e4 LT |
1465 | /** |
1466 | * register_framebuffer - registers a frame buffer device | |
1467 | * @fb_info: frame buffer info structure | |
1468 | * | |
1469 | * Registers a frame buffer device @fb_info. | |
1470 | * | |
1471 | * Returns negative errno on error, or zero for success. | |
1472 | * | |
1473 | */ | |
1474 | ||
1475 | int | |
1476 | register_framebuffer(struct fb_info *fb_info) | |
1477 | { | |
1478 | int i; | |
1479 | struct fb_event event; | |
96fe6a21 | 1480 | struct fb_videomode mode; |
1da177e4 LT |
1481 | |
1482 | if (num_registered_fb == FB_MAX) | |
1483 | return -ENXIO; | |
e4c690e0 AV |
1484 | |
1485 | if (fb_check_foreignness(fb_info)) | |
1486 | return -ENOSYS; | |
1487 | ||
1da177e4 LT |
1488 | num_registered_fb++; |
1489 | for (i = 0 ; i < FB_MAX; i++) | |
1490 | if (!registered_fb[i]) | |
1491 | break; | |
1492 | fb_info->node = i; | |
3e680aae | 1493 | mutex_init(&fb_info->lock); |
1da177e4 | 1494 | |
77997aaa GKH |
1495 | fb_info->dev = device_create(fb_class, fb_info->device, |
1496 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1497 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1498 | /* Not fatal */ |
78cde088 GKH |
1499 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1500 | fb_info->dev = NULL; | |
1da177e4 | 1501 | } else |
78cde088 | 1502 | fb_init_device(fb_info); |
1da177e4 LT |
1503 | |
1504 | if (fb_info->pixmap.addr == NULL) { | |
1505 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1506 | if (fb_info->pixmap.addr) { | |
1507 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1508 | fb_info->pixmap.buf_align = 1; | |
1509 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1510 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1511 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1512 | } | |
1513 | } | |
1514 | fb_info->pixmap.offset = 0; | |
1515 | ||
bf26ad72 AD |
1516 | if (!fb_info->pixmap.blit_x) |
1517 | fb_info->pixmap.blit_x = ~(u32)0; | |
1518 | ||
1519 | if (!fb_info->pixmap.blit_y) | |
1520 | fb_info->pixmap.blit_y = ~(u32)0; | |
1521 | ||
96fe6a21 | 1522 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1523 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1524 | |
96fe6a21 AD |
1525 | fb_var_to_videomode(&mode, &fb_info->var); |
1526 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1527 | registered_fb[i] = fb_info; |
1528 | ||
1da177e4 | 1529 | event.info = fb_info; |
513adb58 AR |
1530 | if (!lock_fb_info(fb_info)) |
1531 | return -ENODEV; | |
256154fb | 1532 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
513adb58 | 1533 | unlock_fb_info(fb_info); |
1da177e4 LT |
1534 | return 0; |
1535 | } | |
1536 | ||
1537 | ||
1538 | /** | |
1539 | * unregister_framebuffer - releases a frame buffer device | |
1540 | * @fb_info: frame buffer info structure | |
1541 | * | |
1542 | * Unregisters a frame buffer device @fb_info. | |
1543 | * | |
1544 | * Returns negative errno on error, or zero for success. | |
1545 | * | |
cfafca80 JB |
1546 | * This function will also notify the framebuffer console |
1547 | * to release the driver. | |
1548 | * | |
1549 | * This is meant to be called within a driver's module_exit() | |
1550 | * function. If this is called outside module_exit(), ensure | |
1551 | * that the driver implements fb_open() and fb_release() to | |
1552 | * check that no processes are using the device. | |
1da177e4 LT |
1553 | */ |
1554 | ||
1555 | int | |
1556 | unregister_framebuffer(struct fb_info *fb_info) | |
1557 | { | |
e614b18d | 1558 | struct fb_event event; |
cfafca80 | 1559 | int i, ret = 0; |
1da177e4 LT |
1560 | |
1561 | i = fb_info->node; | |
cfafca80 JB |
1562 | if (!registered_fb[i]) { |
1563 | ret = -EINVAL; | |
1564 | goto done; | |
1565 | } | |
1566 | ||
513adb58 AR |
1567 | |
1568 | if (!lock_fb_info(fb_info)) | |
1569 | return -ENODEV; | |
cfafca80 JB |
1570 | event.info = fb_info; |
1571 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
513adb58 | 1572 | unlock_fb_info(fb_info); |
cfafca80 JB |
1573 | |
1574 | if (ret) { | |
1575 | ret = -EINVAL; | |
1576 | goto done; | |
1577 | } | |
1da177e4 | 1578 | |
e614b18d AD |
1579 | if (fb_info->pixmap.addr && |
1580 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1581 | kfree(fb_info->pixmap.addr); |
1582 | fb_destroy_modelist(&fb_info->modelist); | |
1583 | registered_fb[i]=NULL; | |
1584 | num_registered_fb--; | |
78cde088 GKH |
1585 | fb_cleanup_device(fb_info); |
1586 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1587 | event.info = fb_info; |
256154fb | 1588 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
cfafca80 JB |
1589 | done: |
1590 | return ret; | |
1da177e4 LT |
1591 | } |
1592 | ||
1da177e4 LT |
1593 | /** |
1594 | * fb_set_suspend - low level driver signals suspend | |
1595 | * @info: framebuffer affected | |
1596 | * @state: 0 = resuming, !=0 = suspending | |
1597 | * | |
1598 | * This is meant to be used by low level drivers to | |
1599 | * signal suspend/resume to the core & clients. | |
1600 | * It must be called with the console semaphore held | |
1601 | */ | |
1602 | void fb_set_suspend(struct fb_info *info, int state) | |
1603 | { | |
1604 | struct fb_event event; | |
1605 | ||
513adb58 AR |
1606 | if (!lock_fb_info(info)) |
1607 | return; | |
1da177e4 LT |
1608 | event.info = info; |
1609 | if (state) { | |
256154fb | 1610 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1611 | info->state = FBINFO_STATE_SUSPENDED; |
1612 | } else { | |
1613 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1614 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 | 1615 | } |
513adb58 | 1616 | unlock_fb_info(info); |
1da177e4 LT |
1617 | } |
1618 | ||
1619 | /** | |
1620 | * fbmem_init - init frame buffer subsystem | |
1621 | * | |
1622 | * Initialize the frame buffer subsystem. | |
1623 | * | |
1624 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1625 | * | |
1626 | */ | |
1627 | ||
1628 | static int __init | |
1629 | fbmem_init(void) | |
1630 | { | |
0aa16341 | 1631 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1632 | |
1da177e4 LT |
1633 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1634 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1635 | ||
56b22935 | 1636 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1637 | if (IS_ERR(fb_class)) { |
1638 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1639 | fb_class = NULL; | |
1640 | } | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | #ifdef MODULE | |
1645 | module_init(fbmem_init); | |
1646 | static void __exit | |
1647 | fbmem_exit(void) | |
1648 | { | |
c43f89c2 | 1649 | remove_proc_entry("fb", NULL); |
56b22935 | 1650 | class_destroy(fb_class); |
5a340cce | 1651 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1652 | } |
1653 | ||
1654 | module_exit(fbmem_exit); | |
1655 | MODULE_LICENSE("GPL"); | |
1656 | MODULE_DESCRIPTION("Framebuffer base"); | |
1657 | #else | |
1658 | subsys_initcall(fbmem_init); | |
1659 | #endif | |
1660 | ||
1661 | int fb_new_modelist(struct fb_info *info) | |
1662 | { | |
1663 | struct fb_event event; | |
1664 | struct fb_var_screeninfo var = info->var; | |
1665 | struct list_head *pos, *n; | |
1666 | struct fb_modelist *modelist; | |
1667 | struct fb_videomode *m, mode; | |
1668 | int err = 1; | |
1669 | ||
1670 | list_for_each_safe(pos, n, &info->modelist) { | |
1671 | modelist = list_entry(pos, struct fb_modelist, list); | |
1672 | m = &modelist->mode; | |
1673 | fb_videomode_to_var(&var, m); | |
1674 | var.activate = FB_ACTIVATE_TEST; | |
1675 | err = fb_set_var(info, &var); | |
1676 | fb_var_to_videomode(&mode, &var); | |
1677 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1678 | list_del(pos); | |
1679 | kfree(pos); | |
1680 | } | |
1681 | } | |
1682 | ||
1683 | err = 1; | |
1684 | ||
1685 | if (!list_empty(&info->modelist)) { | |
513adb58 AR |
1686 | if (!lock_fb_info(info)) |
1687 | return -ENODEV; | |
1da177e4 | 1688 | event.info = info; |
256154fb | 1689 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
513adb58 | 1690 | unlock_fb_info(info); |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | return err; | |
1694 | } | |
1695 | ||
0128beee HD |
1696 | static char *video_options[FB_MAX] __read_mostly; |
1697 | static int ofonly __read_mostly; | |
1da177e4 LT |
1698 | |
1699 | /** | |
1700 | * fb_get_options - get kernel boot parameters | |
1701 | * @name: framebuffer name as it would appear in | |
1702 | * the boot parameter line | |
1703 | * (video=<name>:<options>) | |
1704 | * @option: the option will be stored here | |
1705 | * | |
1706 | * NOTE: Needed to maintain backwards compatibility | |
1707 | */ | |
1708 | int fb_get_options(char *name, char **option) | |
1709 | { | |
1710 | char *opt, *options = NULL; | |
1711 | int opt_len, retval = 0; | |
1712 | int name_len = strlen(name), i; | |
1713 | ||
1714 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1715 | retval = 1; | |
1716 | ||
1717 | if (name_len && !retval) { | |
1718 | for (i = 0; i < FB_MAX; i++) { | |
1719 | if (video_options[i] == NULL) | |
1720 | continue; | |
1721 | opt_len = strlen(video_options[i]); | |
1722 | if (!opt_len) | |
1723 | continue; | |
1724 | opt = video_options[i]; | |
1725 | if (!strncmp(name, opt, name_len) && | |
1726 | opt[name_len] == ':') | |
1727 | options = opt + name_len + 1; | |
1728 | } | |
1729 | } | |
1730 | if (options && !strncmp(options, "off", 3)) | |
1731 | retval = 1; | |
1732 | ||
1733 | if (option) | |
1734 | *option = options; | |
1735 | ||
1736 | return retval; | |
1737 | } | |
1738 | ||
bc6d7fdf | 1739 | #ifndef MODULE |
1da177e4 LT |
1740 | /** |
1741 | * video_setup - process command line options | |
1742 | * @options: string of options | |
1743 | * | |
1744 | * Process command line options for frame buffer subsystem. | |
1745 | * | |
1746 | * NOTE: This function is a __setup and __init function. | |
1747 | * It only stores the options. Drivers have to call | |
1748 | * fb_get_options() as necessary. | |
1749 | * | |
1750 | * Returns zero. | |
1751 | * | |
1752 | */ | |
75c96f85 | 1753 | static int __init video_setup(char *options) |
1da177e4 LT |
1754 | { |
1755 | int i, global = 0; | |
1756 | ||
1757 | if (!options || !*options) | |
1758 | global = 1; | |
1759 | ||
1760 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1761 | ofonly = 1; | |
1762 | global = 1; | |
1763 | } | |
1764 | ||
1765 | if (!global && !strstr(options, "fb:")) { | |
9a054fba | 1766 | fb_mode_option = options; |
1da177e4 LT |
1767 | global = 1; |
1768 | } | |
1769 | ||
1770 | if (!global) { | |
1771 | for (i = 0; i < FB_MAX; i++) { | |
1772 | if (video_options[i] == NULL) { | |
1773 | video_options[i] = options; | |
1774 | break; | |
1775 | } | |
1776 | ||
1777 | } | |
1778 | } | |
1779 | ||
9b41046c | 1780 | return 1; |
1da177e4 LT |
1781 | } |
1782 | __setup("video=", video_setup); | |
bc6d7fdf | 1783 | #endif |
1da177e4 LT |
1784 | |
1785 | /* | |
1786 | * Visible symbols for modules | |
1787 | */ | |
1788 | ||
1789 | EXPORT_SYMBOL(register_framebuffer); | |
1790 | EXPORT_SYMBOL(unregister_framebuffer); | |
1791 | EXPORT_SYMBOL(num_registered_fb); | |
1792 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1793 | EXPORT_SYMBOL(fb_show_logo); |
1794 | EXPORT_SYMBOL(fb_set_var); | |
1795 | EXPORT_SYMBOL(fb_blank); | |
1796 | EXPORT_SYMBOL(fb_pan_display); | |
1797 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1798 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1799 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1800 | |
1801 | MODULE_LICENSE("GPL"); |