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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/fbmem.c | |
3 | * | |
4 | * Copyright (C) 1994 Martin Schaller | |
5 | * | |
6 | * 2001 - Documented with DocBook | |
7 | * - Brad Douglas <brad@neruo.com> | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General Public | |
10 | * License. See the file COPYING in the main directory of this archive | |
11 | * for more details. | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/mman.h> | |
a8f340e3 | 24 | #include <linux/vt.h> |
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/linux_logo.h> | |
27 | #include <linux/proc_fs.h> | |
0aa16341 | 28 | #include <linux/seq_file.h> |
1da177e4 | 29 | #include <linux/console.h> |
1da177e4 | 30 | #include <linux/kmod.h> |
1da177e4 | 31 | #include <linux/err.h> |
1da177e4 LT |
32 | #include <linux/device.h> |
33 | #include <linux/efi.h> | |
10eb2659 | 34 | #include <linux/fb.h> |
1da177e4 | 35 | |
10eb2659 | 36 | #include <asm/fb.h> |
1da177e4 | 37 | |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Frame buffer device initialization and setup routines | |
41 | */ | |
42 | ||
43 | #define FBPIXMAPSIZE (1024 * 8) | |
44 | ||
0128beee HD |
45 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
46 | int num_registered_fb __read_mostly; | |
1da177e4 | 47 | |
6a7f2829 AM |
48 | int lock_fb_info(struct fb_info *info) |
49 | { | |
50 | mutex_lock(&info->lock); | |
51 | if (!info->fbops) { | |
52 | mutex_unlock(&info->lock); | |
53 | return 0; | |
54 | } | |
55 | return 1; | |
56 | } | |
57 | EXPORT_SYMBOL(lock_fb_info); | |
58 | ||
1da177e4 LT |
59 | /* |
60 | * Helpers | |
61 | */ | |
62 | ||
b8c90945 AD |
63 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
64 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 65 | { |
b8c90945 AD |
66 | int depth = 0; |
67 | ||
68 | if (fix->visual == FB_VISUAL_MONO01 || | |
69 | fix->visual == FB_VISUAL_MONO10) | |
70 | depth = 1; | |
71 | else { | |
72 | if (var->green.length == var->blue.length && | |
73 | var->green.length == var->red.length && | |
74 | var->green.offset == var->blue.offset && | |
75 | var->green.offset == var->red.offset) | |
76 | depth = var->green.length; | |
77 | else | |
78 | depth = var->green.length + var->red.length + | |
79 | var->blue.length; | |
80 | } | |
81 | ||
82 | return depth; | |
1da177e4 LT |
83 | } |
84 | EXPORT_SYMBOL(fb_get_color_depth); | |
85 | ||
86 | /* | |
f5a9951c | 87 | * Data padding functions. |
1da177e4 | 88 | */ |
f1ab5dac | 89 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 90 | { |
829e79b6 | 91 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 92 | } |
f1ab5dac | 93 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 94 | |
f1ab5dac JS |
95 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
96 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
97 | { |
98 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
99 | int i, j; | |
100 | ||
101 | for (i = height; i--; ) { | |
102 | for (j = 0; j < idx; j++) { | |
103 | tmp = dst[j]; | |
104 | tmp &= mask; | |
105 | tmp |= *src >> shift_low; | |
106 | dst[j] = tmp; | |
107 | tmp = *src << shift_high; | |
108 | dst[j+1] = tmp; | |
109 | src++; | |
110 | } | |
111 | tmp = dst[idx]; | |
112 | tmp &= mask; | |
113 | tmp |= *src >> shift_low; | |
114 | dst[idx] = tmp; | |
115 | if (shift_high < mod) { | |
116 | tmp = *src << shift_high; | |
117 | dst[idx+1] = tmp; | |
118 | } | |
119 | src++; | |
120 | dst += d_pitch; | |
121 | } | |
122 | } | |
f1ab5dac | 123 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
124 | |
125 | /* | |
126 | * we need to lock this section since fb_cursor | |
127 | * may use fb_imageblit() | |
128 | */ | |
129 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
130 | { | |
131 | u32 align = buf->buf_align - 1, offset; | |
132 | char *addr = buf->addr; | |
133 | ||
134 | /* If IO mapped, we need to sync before access, no sharing of | |
135 | * the pixmap is done | |
136 | */ | |
137 | if (buf->flags & FB_PIXMAP_IO) { | |
138 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
139 | info->fbops->fb_sync(info); | |
140 | return addr; | |
141 | } | |
142 | ||
143 | /* See if we fit in the remaining pixmap space */ | |
144 | offset = buf->offset + align; | |
145 | offset &= ~align; | |
146 | if (offset + size > buf->size) { | |
147 | /* We do not fit. In order to be able to re-use the buffer, | |
148 | * we must ensure no asynchronous DMA'ing or whatever operation | |
149 | * is in progress, we sync for that. | |
150 | */ | |
151 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
152 | info->fbops->fb_sync(info); | |
153 | offset = 0; | |
154 | } | |
155 | buf->offset = offset + size; | |
156 | addr += offset; | |
157 | ||
158 | return addr; | |
159 | } | |
160 | ||
161 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
162 | |
163 | static inline unsigned safe_shift(unsigned d, int n) | |
164 | { | |
165 | return n < 0 ? d >> -n : d << n; | |
166 | } | |
167 | ||
168 | static void fb_set_logocmap(struct fb_info *info, | |
169 | const struct linux_logo *logo) | |
170 | { | |
171 | struct fb_cmap palette_cmap; | |
172 | u16 palette_green[16]; | |
173 | u16 palette_blue[16]; | |
174 | u16 palette_red[16]; | |
175 | int i, j, n; | |
176 | const unsigned char *clut = logo->clut; | |
177 | ||
178 | palette_cmap.start = 0; | |
179 | palette_cmap.len = 16; | |
180 | palette_cmap.red = palette_red; | |
181 | palette_cmap.green = palette_green; | |
182 | palette_cmap.blue = palette_blue; | |
183 | palette_cmap.transp = NULL; | |
184 | ||
185 | for (i = 0; i < logo->clutsize; i += n) { | |
186 | n = logo->clutsize - i; | |
187 | /* palette_cmap provides space for only 16 colors at once */ | |
188 | if (n > 16) | |
189 | n = 16; | |
190 | palette_cmap.start = 32 + i; | |
191 | palette_cmap.len = n; | |
192 | for (j = 0; j < n; ++j) { | |
193 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
194 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
195 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
196 | clut += 3; | |
197 | } | |
198 | fb_set_cmap(&palette_cmap, info); | |
199 | } | |
200 | } | |
201 | ||
202 | static void fb_set_logo_truepalette(struct fb_info *info, | |
203 | const struct linux_logo *logo, | |
204 | u32 *palette) | |
205 | { | |
0128beee | 206 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
207 | unsigned char redmask, greenmask, bluemask; |
208 | int redshift, greenshift, blueshift; | |
209 | int i; | |
210 | const unsigned char *clut = logo->clut; | |
211 | ||
212 | /* | |
213 | * We have to create a temporary palette since console palette is only | |
214 | * 16 colors long. | |
215 | */ | |
216 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
217 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
218 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
219 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
220 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
221 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
222 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
223 | ||
224 | for ( i = 0; i < logo->clutsize; i++) { | |
225 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
226 | safe_shift((clut[1] & greenmask), greenshift) | | |
227 | safe_shift((clut[2] & bluemask), blueshift)); | |
228 | clut += 3; | |
229 | } | |
230 | } | |
231 | ||
232 | static void fb_set_logo_directpalette(struct fb_info *info, | |
233 | const struct linux_logo *logo, | |
234 | u32 *palette) | |
235 | { | |
236 | int redshift, greenshift, blueshift; | |
237 | int i; | |
238 | ||
239 | redshift = info->var.red.offset; | |
240 | greenshift = info->var.green.offset; | |
241 | blueshift = info->var.blue.offset; | |
242 | ||
cf7ee554 | 243 | for (i = 32; i < 32 + logo->clutsize; i++) |
1da177e4 LT |
244 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
245 | } | |
246 | ||
247 | static void fb_set_logo(struct fb_info *info, | |
248 | const struct linux_logo *logo, u8 *dst, | |
249 | int depth) | |
250 | { | |
b8c90945 | 251 | int i, j, k; |
1da177e4 | 252 | const u8 *src = logo->data; |
b8c90945 AD |
253 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
254 | u8 fg = 1, d; | |
1da177e4 | 255 | |
1692b37c AD |
256 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
257 | case 1: | |
258 | fg = 1; | |
259 | break; | |
260 | case 2: | |
261 | fg = 3; | |
262 | break; | |
263 | default: | |
1da177e4 | 264 | fg = 7; |
1692b37c AD |
265 | break; |
266 | } | |
1da177e4 | 267 | |
b8c90945 AD |
268 | if (info->fix.visual == FB_VISUAL_MONO01 || |
269 | info->fix.visual == FB_VISUAL_MONO10) | |
270 | fg = ~((u8) (0xfff << info->var.green.length)); | |
271 | ||
1da177e4 LT |
272 | switch (depth) { |
273 | case 4: | |
274 | for (i = 0; i < logo->height; i++) | |
275 | for (j = 0; j < logo->width; src++) { | |
276 | *dst++ = *src >> 4; | |
277 | j++; | |
278 | if (j < logo->width) { | |
279 | *dst++ = *src & 0x0f; | |
280 | j++; | |
281 | } | |
282 | } | |
283 | break; | |
284 | case 1: | |
285 | for (i = 0; i < logo->height; i++) { | |
286 | for (j = 0; j < logo->width; src++) { | |
287 | d = *src ^ xor; | |
288 | for (k = 7; k >= 0; k--) { | |
289 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
290 | j++; | |
291 | } | |
292 | } | |
293 | } | |
294 | break; | |
295 | } | |
296 | } | |
297 | ||
298 | /* | |
299 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
300 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
301 | * the visual format and color depth of the framebuffer, the DAC, the | |
302 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
303 | * | |
304 | * Case 1 - linux_logo_clut224: | |
305 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
306 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
307 | * | |
308 | * For visuals that require color info from the pseudo_palette, we also construct | |
309 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
310 | * will be set. | |
311 | * | |
312 | * Case 2 - linux_logo_vga16: | |
313 | * The number of colors just matches the console colors, thus there is no need | |
314 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
315 | * each byte contains color information for two pixels (upper and lower nibble). | |
316 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
317 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
318 | * | |
319 | * Case 3 - linux_logo_mono: | |
320 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
321 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
322 | * be set to 1. | |
323 | */ | |
324 | static struct logo_data { | |
325 | int depth; | |
326 | int needs_directpalette; | |
327 | int needs_truepalette; | |
328 | int needs_cmapreset; | |
329 | const struct linux_logo *logo; | |
0128beee | 330 | } fb_logo __read_mostly; |
1da177e4 | 331 | |
9c44e5f6 AD |
332 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
333 | { | |
334 | u32 size = width * height, i; | |
335 | ||
336 | out += size - 1; | |
337 | ||
338 | for (i = size; i--; ) | |
339 | *out-- = *in++; | |
340 | } | |
341 | ||
342 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
343 | { | |
f837e6f7 | 344 | int i, j, h = height - 1; |
9c44e5f6 AD |
345 | |
346 | for (i = 0; i < height; i++) | |
347 | for (j = 0; j < width; j++) | |
f837e6f7 | 348 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
349 | } |
350 | ||
351 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
352 | { | |
353 | int i, j, w = width - 1; | |
354 | ||
355 | for (i = 0; i < height; i++) | |
356 | for (j = 0; j < width; j++) | |
357 | out[height * (w - j) + i] = *in++; | |
358 | } | |
359 | ||
360 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
361 | struct fb_image *image, int rotate) | |
362 | { | |
363 | u32 tmp; | |
364 | ||
365 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
366 | fb_rotate_logo_ud(image->data, dst, image->width, |
367 | image->height); | |
abed5d15 GU |
368 | image->dx = info->var.xres - image->width - image->dx; |
369 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 370 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
371 | fb_rotate_logo_cw(image->data, dst, image->width, |
372 | image->height); | |
9c44e5f6 AD |
373 | tmp = image->width; |
374 | image->width = image->height; | |
375 | image->height = tmp; | |
abed5d15 GU |
376 | tmp = image->dy; |
377 | image->dy = image->dx; | |
378 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 379 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
380 | fb_rotate_logo_ccw(image->data, dst, image->width, |
381 | image->height); | |
f837e6f7 AD |
382 | tmp = image->width; |
383 | image->width = image->height; | |
384 | image->height = tmp; | |
abed5d15 GU |
385 | tmp = image->dx; |
386 | image->dx = image->dy; | |
387 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
388 | } |
389 | ||
390 | image->data = dst; | |
391 | } | |
392 | ||
393 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 394 | int rotate, unsigned int num) |
9c44e5f6 | 395 | { |
448d4797 | 396 | unsigned int x; |
9c44e5f6 AD |
397 | |
398 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
399 | for (x = 0; |
400 | x < num && image->dx + image->width <= info->var.xres; | |
401 | x++) { | |
9c44e5f6 | 402 | info->fbops->fb_imageblit(info, image); |
448d4797 | 403 | image->dx += image->width + 8; |
9c44e5f6 AD |
404 | } |
405 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 406 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 407 | info->fbops->fb_imageblit(info, image); |
448d4797 | 408 | image->dx -= image->width + 8; |
9c44e5f6 AD |
409 | } |
410 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
411 | for (x = 0; |
412 | x < num && image->dy + image->height <= info->var.yres; | |
413 | x++) { | |
9c44e5f6 | 414 | info->fbops->fb_imageblit(info, image); |
448d4797 | 415 | image->dy += image->height + 8; |
9c44e5f6 AD |
416 | } |
417 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 418 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 419 | info->fbops->fb_imageblit(info, image); |
448d4797 | 420 | image->dy -= image->height + 8; |
9c44e5f6 AD |
421 | } |
422 | } | |
423 | } | |
424 | ||
90da63e5 GU |
425 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
426 | const struct linux_logo *logo, int y, | |
427 | unsigned int n) | |
1da177e4 LT |
428 | { |
429 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 430 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 431 | struct fb_image image; |
1da177e4 LT |
432 | |
433 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 434 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 435 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
436 | return 0; |
437 | ||
438 | image.depth = 8; | |
90da63e5 | 439 | image.data = logo->data; |
1da177e4 LT |
440 | |
441 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 442 | fb_set_logocmap(info, logo); |
1da177e4 | 443 | |
9900abfb | 444 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
445 | fb_logo.needs_directpalette) { |
446 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
447 | if (palette == NULL) | |
448 | return 0; | |
449 | ||
450 | if (fb_logo.needs_truepalette) | |
90da63e5 | 451 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 452 | else |
90da63e5 | 453 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
454 | |
455 | saved_pseudo_palette = info->pseudo_palette; | |
456 | info->pseudo_palette = palette; | |
457 | } | |
458 | ||
459 | if (fb_logo.depth <= 4) { | |
90da63e5 | 460 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
461 | if (logo_new == NULL) { |
462 | kfree(palette); | |
463 | if (saved_pseudo_palette) | |
464 | info->pseudo_palette = saved_pseudo_palette; | |
465 | return 0; | |
466 | } | |
467 | image.data = logo_new; | |
90da63e5 | 468 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
469 | } |
470 | ||
9c44e5f6 | 471 | image.dx = 0; |
90da63e5 GU |
472 | image.dy = y; |
473 | image.width = logo->width; | |
474 | image.height = logo->height; | |
1da177e4 | 475 | |
9c44e5f6 | 476 | if (rotate) { |
90da63e5 GU |
477 | logo_rotate = kmalloc(logo->width * |
478 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
479 | if (logo_rotate) |
480 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 481 | } |
9c44e5f6 | 482 | |
90da63e5 | 483 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 484 | |
1da177e4 LT |
485 | kfree(palette); |
486 | if (saved_pseudo_palette != NULL) | |
487 | info->pseudo_palette = saved_pseudo_palette; | |
488 | kfree(logo_new); | |
9c44e5f6 | 489 | kfree(logo_rotate); |
90da63e5 GU |
490 | return logo->height; |
491 | } | |
492 | ||
9900abfb GU |
493 | |
494 | #ifdef CONFIG_FB_LOGO_EXTRA | |
495 | ||
496 | #define FB_LOGO_EX_NUM_MAX 10 | |
497 | static struct logo_data_extra { | |
498 | const struct linux_logo *logo; | |
499 | unsigned int n; | |
500 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
501 | static unsigned int fb_logo_ex_num; | |
502 | ||
503 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
504 | { | |
505 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
506 | return; | |
507 | ||
508 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
509 | fb_logo_ex[fb_logo_ex_num].n = n; | |
510 | fb_logo_ex_num++; | |
511 | } | |
512 | ||
513 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
514 | unsigned int yres) | |
515 | { | |
516 | unsigned int i; | |
517 | ||
518 | /* FIXME: logo_ex supports only truecolor fb. */ | |
519 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
520 | fb_logo_ex_num = 0; | |
521 | ||
522 | for (i = 0; i < fb_logo_ex_num; i++) { | |
4fb6de25 GU |
523 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
524 | fb_logo_ex[i].logo = NULL; | |
525 | continue; | |
526 | } | |
9900abfb GU |
527 | height += fb_logo_ex[i].logo->height; |
528 | if (height > yres) { | |
529 | height -= fb_logo_ex[i].logo->height; | |
530 | fb_logo_ex_num = i; | |
531 | break; | |
532 | } | |
533 | } | |
534 | return height; | |
535 | } | |
536 | ||
537 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
538 | { | |
539 | unsigned int i; | |
540 | ||
541 | for (i = 0; i < fb_logo_ex_num; i++) | |
542 | y += fb_show_logo_line(info, rotate, | |
543 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
544 | ||
545 | return y; | |
546 | } | |
547 | ||
548 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
549 | ||
550 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
551 | unsigned int height, | |
552 | unsigned int yres) | |
553 | { | |
554 | return height; | |
555 | } | |
556 | ||
557 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
558 | { | |
559 | return y; | |
560 | } | |
561 | ||
562 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
563 | ||
564 | ||
565 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
566 | { | |
567 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
568 | unsigned int yres; | |
569 | ||
570 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
571 | ||
572 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
573 | info->flags & FBINFO_MODULE) | |
574 | return 0; | |
575 | ||
576 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
577 | depth = info->var.blue.length; | |
578 | if (info->var.red.length < depth) | |
579 | depth = info->var.red.length; | |
580 | if (info->var.green.length < depth) | |
581 | depth = info->var.green.length; | |
582 | } | |
583 | ||
584 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
585 | /* assume console colormap */ | |
586 | depth = 4; | |
587 | } | |
588 | ||
9900abfb GU |
589 | /* Return if no suitable logo was found */ |
590 | fb_logo.logo = fb_find_logo(depth); | |
591 | ||
592 | if (!fb_logo.logo) { | |
593 | return 0; | |
594 | } | |
595 | ||
596 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
597 | yres = info->var.yres; | |
598 | else | |
599 | yres = info->var.xres; | |
600 | ||
601 | if (fb_logo.logo->height > yres) { | |
602 | fb_logo.logo = NULL; | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* What depth we asked for might be different from what we get */ | |
607 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
608 | fb_logo.depth = 8; | |
609 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
610 | fb_logo.depth = 4; | |
611 | else | |
612 | fb_logo.depth = 1; | |
613 | ||
1692b37c AD |
614 | |
615 | if (fb_logo.depth > 4 && depth > 4) { | |
616 | switch (info->fix.visual) { | |
617 | case FB_VISUAL_TRUECOLOR: | |
618 | fb_logo.needs_truepalette = 1; | |
619 | break; | |
620 | case FB_VISUAL_DIRECTCOLOR: | |
621 | fb_logo.needs_directpalette = 1; | |
622 | fb_logo.needs_cmapreset = 1; | |
623 | break; | |
624 | case FB_VISUAL_PSEUDOCOLOR: | |
625 | fb_logo.needs_cmapreset = 1; | |
626 | break; | |
627 | } | |
628 | } | |
629 | ||
9900abfb GU |
630 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
631 | } | |
632 | ||
90da63e5 GU |
633 | int fb_show_logo(struct fb_info *info, int rotate) |
634 | { | |
9900abfb GU |
635 | int y; |
636 | ||
637 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
638 | num_online_cpus()); | |
639 | y = fb_show_extra_logos(info, y, rotate); | |
640 | ||
641 | return y; | |
1da177e4 LT |
642 | } |
643 | #else | |
9c44e5f6 AD |
644 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
645 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
646 | #endif /* CONFIG_LOGO */ |
647 | ||
0aa16341 AD |
648 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
649 | { | |
650 | return (*pos < FB_MAX) ? pos : NULL; | |
651 | } | |
652 | ||
653 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
654 | { | |
655 | (*pos)++; | |
656 | return (*pos < FB_MAX) ? pos : NULL; | |
657 | } | |
658 | ||
659 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 660 | { |
1da177e4 LT |
661 | } |
662 | ||
0aa16341 AD |
663 | static int fb_seq_show(struct seq_file *m, void *v) |
664 | { | |
665 | int i = *(loff_t *)v; | |
666 | struct fb_info *fi = registered_fb[i]; | |
667 | ||
668 | if (fi) | |
669 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
670 | return 0; | |
671 | } | |
672 | ||
673 | static const struct seq_operations proc_fb_seq_ops = { | |
674 | .start = fb_seq_start, | |
675 | .next = fb_seq_next, | |
676 | .stop = fb_seq_stop, | |
677 | .show = fb_seq_show, | |
678 | }; | |
679 | ||
680 | static int proc_fb_open(struct inode *inode, struct file *file) | |
681 | { | |
682 | return seq_open(file, &proc_fb_seq_ops); | |
683 | } | |
684 | ||
685 | static const struct file_operations fb_proc_fops = { | |
686 | .owner = THIS_MODULE, | |
687 | .open = proc_fb_open, | |
688 | .read = seq_read, | |
689 | .llseek = seq_lseek, | |
690 | .release = seq_release, | |
691 | }; | |
692 | ||
1da177e4 LT |
693 | static ssize_t |
694 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
695 | { | |
696 | unsigned long p = *ppos; | |
ad9a824e | 697 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
698 | int fbidx = iminor(inode); |
699 | struct fb_info *info = registered_fb[fbidx]; | |
700 | u32 *buffer, *dst; | |
701 | u32 __iomem *src; | |
702 | int c, i, cnt = 0, err = 0; | |
703 | unsigned long total_size; | |
704 | ||
705 | if (!info || ! info->screen_base) | |
706 | return -ENODEV; | |
707 | ||
708 | if (info->state != FBINFO_STATE_RUNNING) | |
709 | return -EPERM; | |
710 | ||
711 | if (info->fbops->fb_read) | |
3f9b0880 | 712 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
713 | |
714 | total_size = info->screen_size; | |
0a484a3a | 715 | |
1da177e4 LT |
716 | if (total_size == 0) |
717 | total_size = info->fix.smem_len; | |
718 | ||
719 | if (p >= total_size) | |
0a484a3a AD |
720 | return 0; |
721 | ||
1da177e4 | 722 | if (count >= total_size) |
0a484a3a AD |
723 | count = total_size; |
724 | ||
1da177e4 LT |
725 | if (count + p > total_size) |
726 | count = total_size - p; | |
727 | ||
1da177e4 LT |
728 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
729 | GFP_KERNEL); | |
730 | if (!buffer) | |
731 | return -ENOMEM; | |
732 | ||
733 | src = (u32 __iomem *) (info->screen_base + p); | |
734 | ||
735 | if (info->fbops->fb_sync) | |
736 | info->fbops->fb_sync(info); | |
737 | ||
738 | while (count) { | |
739 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
740 | dst = buffer; | |
741 | for (i = c >> 2; i--; ) | |
742 | *dst++ = fb_readl(src++); | |
743 | if (c & 3) { | |
744 | u8 *dst8 = (u8 *) dst; | |
745 | u8 __iomem *src8 = (u8 __iomem *) src; | |
746 | ||
747 | for (i = c & 3; i--;) | |
748 | *dst8++ = fb_readb(src8++); | |
749 | ||
750 | src = (u32 __iomem *) src8; | |
751 | } | |
752 | ||
753 | if (copy_to_user(buf, buffer, c)) { | |
754 | err = -EFAULT; | |
755 | break; | |
756 | } | |
757 | *ppos += c; | |
758 | buf += c; | |
759 | cnt += c; | |
760 | count -= c; | |
761 | } | |
762 | ||
763 | kfree(buffer); | |
0a484a3a | 764 | |
1da177e4 LT |
765 | return (err) ? err : cnt; |
766 | } | |
767 | ||
768 | static ssize_t | |
769 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
770 | { | |
771 | unsigned long p = *ppos; | |
ad9a824e | 772 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
773 | int fbidx = iminor(inode); |
774 | struct fb_info *info = registered_fb[fbidx]; | |
775 | u32 *buffer, *src; | |
776 | u32 __iomem *dst; | |
0a484a3a | 777 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
778 | unsigned long total_size; |
779 | ||
780 | if (!info || !info->screen_base) | |
781 | return -ENODEV; | |
782 | ||
783 | if (info->state != FBINFO_STATE_RUNNING) | |
784 | return -EPERM; | |
785 | ||
786 | if (info->fbops->fb_write) | |
3f9b0880 | 787 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
788 | |
789 | total_size = info->screen_size; | |
0a484a3a | 790 | |
1da177e4 LT |
791 | if (total_size == 0) |
792 | total_size = info->fix.smem_len; | |
793 | ||
794 | if (p > total_size) | |
6a2a8866 | 795 | return -EFBIG; |
0a484a3a | 796 | |
6a2a8866 AD |
797 | if (count > total_size) { |
798 | err = -EFBIG; | |
0a484a3a | 799 | count = total_size; |
6a2a8866 AD |
800 | } |
801 | ||
802 | if (count + p > total_size) { | |
803 | if (!err) | |
804 | err = -ENOSPC; | |
0a484a3a | 805 | |
0a484a3a | 806 | count = total_size - p; |
6a2a8866 | 807 | } |
0a484a3a | 808 | |
1da177e4 LT |
809 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
810 | GFP_KERNEL); | |
811 | if (!buffer) | |
812 | return -ENOMEM; | |
813 | ||
814 | dst = (u32 __iomem *) (info->screen_base + p); | |
815 | ||
816 | if (info->fbops->fb_sync) | |
817 | info->fbops->fb_sync(info); | |
818 | ||
819 | while (count) { | |
820 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
821 | src = buffer; | |
0a484a3a | 822 | |
1da177e4 LT |
823 | if (copy_from_user(src, buf, c)) { |
824 | err = -EFAULT; | |
825 | break; | |
826 | } | |
0a484a3a | 827 | |
1da177e4 LT |
828 | for (i = c >> 2; i--; ) |
829 | fb_writel(*src++, dst++); | |
0a484a3a | 830 | |
1da177e4 LT |
831 | if (c & 3) { |
832 | u8 *src8 = (u8 *) src; | |
833 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
834 | ||
835 | for (i = c & 3; i--; ) | |
836 | fb_writeb(*src8++, dst8++); | |
837 | ||
838 | dst = (u32 __iomem *) dst8; | |
839 | } | |
0a484a3a | 840 | |
1da177e4 LT |
841 | *ppos += c; |
842 | buf += c; | |
843 | cnt += c; | |
844 | count -= c; | |
845 | } | |
0a484a3a | 846 | |
1da177e4 LT |
847 | kfree(buffer); |
848 | ||
6a2a8866 | 849 | return (cnt) ? cnt : err; |
1da177e4 LT |
850 | } |
851 | ||
1da177e4 LT |
852 | int |
853 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
854 | { | |
1207069f | 855 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
856 | unsigned int yres = info->var.yres; |
857 | int err = 0; | |
1207069f AD |
858 | |
859 | if (var->yoffset > 0) { | |
860 | if (var->vmode & FB_VMODE_YWRAP) { | |
861 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
862 | err = -EINVAL; | |
863 | else | |
864 | yres = 0; | |
865 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
866 | err = -EINVAL; | |
867 | } | |
868 | ||
869 | if (var->xoffset > 0 && (!fix->xpanstep || | |
870 | (var->xoffset % fix->xpanstep))) | |
871 | err = -EINVAL; | |
872 | ||
7572a1ea VS |
873 | if (err || !info->fbops->fb_pan_display || |
874 | var->yoffset + yres > info->var.yres_virtual || | |
1207069f AD |
875 | var->xoffset + info->var.xres > info->var.xres_virtual) |
876 | return -EINVAL; | |
1da177e4 | 877 | |
1da177e4 LT |
878 | if ((err = info->fbops->fb_pan_display(var, info))) |
879 | return err; | |
880 | info->var.xoffset = var->xoffset; | |
881 | info->var.yoffset = var->yoffset; | |
882 | if (var->vmode & FB_VMODE_YWRAP) | |
883 | info->var.vmode |= FB_VMODE_YWRAP; | |
884 | else | |
885 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
886 | return 0; | |
887 | } | |
888 | ||
38a3dc51 AD |
889 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
890 | u32 activate) | |
891 | { | |
892 | struct fb_event event; | |
893 | struct fb_blit_caps caps, fbcaps; | |
894 | int err = 0; | |
895 | ||
896 | memset(&caps, 0, sizeof(caps)); | |
897 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
898 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
899 | event.info = info; | |
900 | event.data = ∩︀ | |
901 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
902 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
903 | ||
904 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
905 | ((fbcaps.y ^ caps.y) & caps.y) || | |
906 | (fbcaps.len < caps.len)) | |
907 | err = -EINVAL; | |
908 | ||
909 | return err; | |
910 | } | |
911 | ||
1da177e4 LT |
912 | int |
913 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
914 | { | |
b1e7223f AD |
915 | int flags = info->flags; |
916 | int ret = 0; | |
1da177e4 LT |
917 | |
918 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
919 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
920 | |
921 | fb_var_to_videomode(&mode1, var); | |
922 | fb_var_to_videomode(&mode2, &info->var); | |
923 | /* make sure we don't delete the videomode of current var */ | |
924 | ret = fb_mode_is_equal(&mode1, &mode2); | |
925 | ||
926 | if (!ret) { | |
927 | struct fb_event event; | |
928 | ||
929 | event.info = info; | |
930 | event.data = &mode1; | |
256154fb | 931 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
932 | } |
933 | ||
934 | if (!ret) | |
935 | fb_delete_videomode(&mode1, &info->modelist); | |
936 | ||
b1e7223f AD |
937 | |
938 | ret = (ret) ? -EINVAL : 0; | |
939 | goto done; | |
1da177e4 LT |
940 | } |
941 | ||
942 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
943 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
944 | u32 activate = var->activate; |
945 | ||
1da177e4 LT |
946 | if (!info->fbops->fb_check_var) { |
947 | *var = info->var; | |
b1e7223f | 948 | goto done; |
1da177e4 LT |
949 | } |
950 | ||
b1e7223f AD |
951 | ret = info->fbops->fb_check_var(var, info); |
952 | ||
953 | if (ret) | |
954 | goto done; | |
1da177e4 LT |
955 | |
956 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
957 | struct fb_videomode mode; | |
1da177e4 | 958 | |
38a3dc51 | 959 | if (info->fbops->fb_get_caps) { |
b1e7223f | 960 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 961 | |
b1e7223f | 962 | if (ret) |
38a3dc51 AD |
963 | goto done; |
964 | } | |
965 | ||
1da177e4 | 966 | info->var = *var; |
38a3dc51 | 967 | |
1da177e4 LT |
968 | if (info->fbops->fb_set_par) |
969 | info->fbops->fb_set_par(info); | |
970 | ||
971 | fb_pan_display(info, &info->var); | |
1da177e4 | 972 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
973 | fb_var_to_videomode(&mode, &info->var); |
974 | ||
975 | if (info->modelist.prev && info->modelist.next && | |
976 | !list_empty(&info->modelist)) | |
b1e7223f | 977 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 978 | |
b1e7223f | 979 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 980 | struct fb_event event; |
4941cb7a | 981 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
982 | FB_EVENT_MODE_CHANGE_ALL : |
983 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
984 | |
985 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
986 | event.info = info; | |
faa312da | 987 | event.data = &mode; |
256154fb | 988 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
989 | } |
990 | } | |
991 | } | |
38a3dc51 AD |
992 | |
993 | done: | |
b1e7223f | 994 | return ret; |
1da177e4 LT |
995 | } |
996 | ||
997 | int | |
998 | fb_blank(struct fb_info *info, int blank) | |
999 | { | |
1000 | int ret = -EINVAL; | |
1001 | ||
1002 | if (blank > FB_BLANK_POWERDOWN) | |
1003 | blank = FB_BLANK_POWERDOWN; | |
1004 | ||
1005 | if (info->fbops->fb_blank) | |
1006 | ret = info->fbops->fb_blank(blank, info); | |
1007 | ||
1008 | if (!ret) { | |
1009 | struct fb_event event; | |
1010 | ||
1011 | event.info = info; | |
1012 | event.data = ␣ | |
256154fb | 1013 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | return ret; | |
1017 | } | |
1018 | ||
a684e7d3 GU |
1019 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1020 | unsigned long arg) | |
1da177e4 | 1021 | { |
e5367711 | 1022 | struct fb_ops *fb; |
1da177e4 LT |
1023 | struct fb_var_screeninfo var; |
1024 | struct fb_fix_screeninfo fix; | |
1025 | struct fb_con2fbmap con2fb; | |
1f5e31d7 | 1026 | struct fb_cmap cmap_from; |
1da177e4 LT |
1027 | struct fb_cmap_user cmap; |
1028 | struct fb_event event; | |
1029 | void __user *argp = (void __user *)arg; | |
e5367711 AC |
1030 | long ret = 0; |
1031 | ||
1da177e4 LT |
1032 | switch (cmd) { |
1033 | case FBIOGET_VSCREENINFO: | |
1f5e31d7 AR |
1034 | if (!lock_fb_info(info)) |
1035 | return -ENODEV; | |
1036 | var = info->var; | |
1037 | unlock_fb_info(info); | |
1038 | ||
1039 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; | |
e5367711 | 1040 | break; |
1da177e4 | 1041 | case FBIOPUT_VSCREENINFO: |
1f5e31d7 AR |
1042 | if (copy_from_user(&var, argp, sizeof(var))) |
1043 | return -EFAULT; | |
1044 | if (!lock_fb_info(info)) | |
1045 | return -ENODEV; | |
1da177e4 LT |
1046 | acquire_console_sem(); |
1047 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1048 | ret = fb_set_var(info, &var); |
1da177e4 LT |
1049 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1050 | release_console_sem(); | |
1f5e31d7 AR |
1051 | unlock_fb_info(info); |
1052 | if (!ret && copy_to_user(argp, &var, sizeof(var))) | |
e5367711 AC |
1053 | ret = -EFAULT; |
1054 | break; | |
1da177e4 | 1055 | case FBIOGET_FSCREENINFO: |
1f5e31d7 AR |
1056 | if (!lock_fb_info(info)) |
1057 | return -ENODEV; | |
1058 | fix = info->fix; | |
1059 | unlock_fb_info(info); | |
1060 | ||
1061 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; | |
e5367711 | 1062 | break; |
1da177e4 LT |
1063 | case FBIOPUTCMAP: |
1064 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1065 | return -EFAULT; |
1066 | ret = fb_set_user_cmap(&cmap, info); | |
e5367711 | 1067 | break; |
1da177e4 LT |
1068 | case FBIOGETCMAP: |
1069 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1070 | return -EFAULT; |
1071 | if (!lock_fb_info(info)) | |
1072 | return -ENODEV; | |
1073 | cmap_from = info->cmap; | |
1074 | unlock_fb_info(info); | |
1075 | ret = fb_cmap_to_user(&cmap_from, &cmap); | |
e5367711 | 1076 | break; |
1da177e4 | 1077 | case FBIOPAN_DISPLAY: |
1f5e31d7 AR |
1078 | if (copy_from_user(&var, argp, sizeof(var))) |
1079 | return -EFAULT; | |
1080 | if (!lock_fb_info(info)) | |
1081 | return -ENODEV; | |
1da177e4 | 1082 | acquire_console_sem(); |
e5367711 | 1083 | ret = fb_pan_display(info, &var); |
1da177e4 | 1084 | release_console_sem(); |
1f5e31d7 | 1085 | unlock_fb_info(info); |
e5367711 | 1086 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1f5e31d7 | 1087 | return -EFAULT; |
e5367711 | 1088 | break; |
1da177e4 | 1089 | case FBIO_CURSOR: |
e5367711 AC |
1090 | ret = -EINVAL; |
1091 | break; | |
1da177e4 LT |
1092 | case FBIOGET_CON2FBMAP: |
1093 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1f5e31d7 AR |
1094 | return -EFAULT; |
1095 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1096 | return -EINVAL; | |
1097 | con2fb.framebuffer = -1; | |
1098 | event.data = &con2fb; | |
513adb58 AR |
1099 | if (!lock_fb_info(info)) |
1100 | return -ENODEV; | |
1f5e31d7 AR |
1101 | event.info = info; |
1102 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); | |
513adb58 | 1103 | unlock_fb_info(info); |
1f5e31d7 | 1104 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
e5367711 | 1105 | break; |
1da177e4 | 1106 | case FBIOPUT_CON2FBMAP: |
1f5e31d7 AR |
1107 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1108 | return -EFAULT; | |
1109 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1110 | return -EINVAL; | |
1111 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
1112 | return -EINVAL; | |
1da177e4 | 1113 | if (!registered_fb[con2fb.framebuffer]) |
e5367711 AC |
1114 | request_module("fb%d", con2fb.framebuffer); |
1115 | if (!registered_fb[con2fb.framebuffer]) { | |
1116 | ret = -EINVAL; | |
1117 | break; | |
1118 | } | |
1da177e4 | 1119 | event.data = &con2fb; |
513adb58 AR |
1120 | if (!lock_fb_info(info)) |
1121 | return -ENODEV; | |
1f5e31d7 | 1122 | event.info = info; |
66c1ca01 | 1123 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
513adb58 | 1124 | unlock_fb_info(info); |
e5367711 | 1125 | break; |
1da177e4 | 1126 | case FBIOBLANK: |
1f5e31d7 AR |
1127 | if (!lock_fb_info(info)) |
1128 | return -ENODEV; | |
1da177e4 LT |
1129 | acquire_console_sem(); |
1130 | info->flags |= FBINFO_MISC_USEREVENT; | |
e5367711 | 1131 | ret = fb_blank(info, arg); |
1da177e4 LT |
1132 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1133 | release_console_sem(); | |
1f5e31d7 AR |
1134 | unlock_fb_info(info); |
1135 | break; | |
1da177e4 | 1136 | default: |
1f5e31d7 AR |
1137 | if (!lock_fb_info(info)) |
1138 | return -ENODEV; | |
1139 | fb = info->fbops; | |
1140 | if (fb->fb_ioctl) | |
e5367711 | 1141 | ret = fb->fb_ioctl(info, cmd, arg); |
1f5e31d7 AR |
1142 | else |
1143 | ret = -ENOTTY; | |
1144 | unlock_fb_info(info); | |
1da177e4 | 1145 | } |
a684e7d3 GU |
1146 | return ret; |
1147 | } | |
1148 | ||
1149 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
a684e7d3 GU |
1150 | { |
1151 | struct inode *inode = file->f_path.dentry->d_inode; | |
1152 | int fbidx = iminor(inode); | |
1f5e31d7 | 1153 | struct fb_info *info = registered_fb[fbidx]; |
a684e7d3 | 1154 | |
1f5e31d7 | 1155 | return do_fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1156 | } |
1157 | ||
1158 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1159 | struct fb_fix_screeninfo32 { |
1160 | char id[16]; | |
1161 | compat_caddr_t smem_start; | |
1162 | u32 smem_len; | |
1163 | u32 type; | |
1164 | u32 type_aux; | |
1165 | u32 visual; | |
1166 | u16 xpanstep; | |
1167 | u16 ypanstep; | |
1168 | u16 ywrapstep; | |
1169 | u32 line_length; | |
1170 | compat_caddr_t mmio_start; | |
1171 | u32 mmio_len; | |
1172 | u32 accel; | |
1173 | u16 reserved[3]; | |
1174 | }; | |
1175 | ||
1176 | struct fb_cmap32 { | |
1177 | u32 start; | |
1178 | u32 len; | |
1179 | compat_caddr_t red; | |
1180 | compat_caddr_t green; | |
1181 | compat_caddr_t blue; | |
1182 | compat_caddr_t transp; | |
1183 | }; | |
1184 | ||
a684e7d3 GU |
1185 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1186 | unsigned long arg) | |
c7f82d9c AB |
1187 | { |
1188 | struct fb_cmap_user __user *cmap; | |
1189 | struct fb_cmap32 __user *cmap32; | |
1190 | __u32 data; | |
1191 | int err; | |
1192 | ||
1193 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1194 | cmap32 = compat_ptr(arg); | |
1195 | ||
1196 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1197 | return -EFAULT; | |
1198 | ||
1199 | if (get_user(data, &cmap32->red) || | |
1200 | put_user(compat_ptr(data), &cmap->red) || | |
1201 | get_user(data, &cmap32->green) || | |
1202 | put_user(compat_ptr(data), &cmap->green) || | |
1203 | get_user(data, &cmap32->blue) || | |
1204 | put_user(compat_ptr(data), &cmap->blue) || | |
1205 | get_user(data, &cmap32->transp) || | |
1206 | put_user(compat_ptr(data), &cmap->transp)) | |
1207 | return -EFAULT; | |
1208 | ||
a684e7d3 | 1209 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
c7f82d9c AB |
1210 | |
1211 | if (!err) { | |
1212 | if (copy_in_user(&cmap32->start, | |
1213 | &cmap->start, | |
1214 | 2 * sizeof(__u32))) | |
1215 | err = -EFAULT; | |
1216 | } | |
1217 | return err; | |
1218 | } | |
1219 | ||
1220 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1221 | struct fb_fix_screeninfo32 __user *fix32) | |
1222 | { | |
1223 | __u32 data; | |
1224 | int err; | |
1225 | ||
1226 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1227 | ||
1228 | data = (__u32) (unsigned long) fix->smem_start; | |
1229 | err |= put_user(data, &fix32->smem_start); | |
1230 | ||
1231 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1232 | err |= put_user(fix->type, &fix32->type); | |
1233 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1234 | err |= put_user(fix->visual, &fix32->visual); | |
1235 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1236 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1237 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1238 | err |= put_user(fix->line_length, &fix32->line_length); | |
1239 | ||
1240 | data = (__u32) (unsigned long) fix->mmio_start; | |
1241 | err |= put_user(data, &fix32->mmio_start); | |
1242 | ||
1243 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1244 | err |= put_user(fix->accel, &fix32->accel); | |
1245 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1246 | sizeof(fix->reserved)); | |
1247 | ||
1248 | return err; | |
1249 | } | |
1250 | ||
a684e7d3 GU |
1251 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1252 | unsigned long arg) | |
c7f82d9c AB |
1253 | { |
1254 | mm_segment_t old_fs; | |
1255 | struct fb_fix_screeninfo fix; | |
1256 | struct fb_fix_screeninfo32 __user *fix32; | |
1257 | int err; | |
1258 | ||
1259 | fix32 = compat_ptr(arg); | |
1260 | ||
1261 | old_fs = get_fs(); | |
1262 | set_fs(KERNEL_DS); | |
a684e7d3 | 1263 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
c7f82d9c AB |
1264 | set_fs(old_fs); |
1265 | ||
1266 | if (!err) | |
1267 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1268 | ||
1269 | return err; | |
1270 | } | |
1271 | ||
a684e7d3 GU |
1272 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1273 | unsigned long arg) | |
1da177e4 | 1274 | { |
ad9a824e | 1275 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1276 | int fbidx = iminor(inode); |
1da177e4 LT |
1277 | struct fb_info *info = registered_fb[fbidx]; |
1278 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1279 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1280 | |
c7f82d9c AB |
1281 | switch(cmd) { |
1282 | case FBIOGET_VSCREENINFO: | |
1283 | case FBIOPUT_VSCREENINFO: | |
1284 | case FBIOPAN_DISPLAY: | |
1285 | case FBIOGET_CON2FBMAP: | |
1286 | case FBIOPUT_CON2FBMAP: | |
1287 | arg = (unsigned long) compat_ptr(arg); | |
1288 | case FBIOBLANK: | |
a684e7d3 GU |
1289 | ret = do_fb_ioctl(info, cmd, arg); |
1290 | break; | |
c7f82d9c AB |
1291 | |
1292 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1293 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1294 | break; |
1295 | ||
1296 | case FBIOGETCMAP: | |
1297 | case FBIOPUTCMAP: | |
a684e7d3 | 1298 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1299 | break; |
1300 | ||
1301 | default: | |
1302 | if (fb->fb_compat_ioctl) | |
67a6680d | 1303 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1304 | break; |
1305 | } | |
1da177e4 LT |
1306 | return ret; |
1307 | } | |
1308 | #endif | |
1309 | ||
10eb2659 | 1310 | static int |
1da177e4 LT |
1311 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1312 | { | |
ad9a824e | 1313 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1314 | struct fb_info *info = registered_fb[fbidx]; |
1315 | struct fb_ops *fb = info->fbops; | |
1316 | unsigned long off; | |
1da177e4 LT |
1317 | unsigned long start; |
1318 | u32 len; | |
1da177e4 LT |
1319 | |
1320 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1321 | return -EINVAL; | |
1322 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1323 | if (!fb) | |
1324 | return -ENODEV; | |
537a1bf0 | 1325 | mutex_lock(&info->mm_lock); |
1da177e4 LT |
1326 | if (fb->fb_mmap) { |
1327 | int res; | |
216d526c | 1328 | res = fb->fb_mmap(info, vma); |
537a1bf0 | 1329 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1330 | return res; |
1331 | } | |
1332 | ||
1da177e4 LT |
1333 | /* frame buffer memory */ |
1334 | start = info->fix.smem_start; | |
1335 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1336 | if (off >= len) { | |
1337 | /* memory mapped io */ | |
1338 | off -= len; | |
1339 | if (info->var.accel_flags) { | |
537a1bf0 | 1340 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1341 | return -EINVAL; |
1342 | } | |
1343 | start = info->fix.mmio_start; | |
1344 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1345 | } | |
537a1bf0 | 1346 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1347 | start &= PAGE_MASK; |
1348 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1349 | return -EINVAL; | |
1350 | off += start; | |
1351 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1352 | /* This is an IO map - tell maydump to skip this VMA */ | |
1353 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
10eb2659 | 1354 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1355 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1356 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1357 | return -EAGAIN; | |
1da177e4 | 1358 | return 0; |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | static int | |
1362 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1363 | __acquires(&info->lock) |
1364 | __releases(&info->lock) | |
1da177e4 LT |
1365 | { |
1366 | int fbidx = iminor(inode); | |
1367 | struct fb_info *info; | |
1368 | int res = 0; | |
1369 | ||
1370 | if (fbidx >= FB_MAX) | |
1371 | return -ENODEV; | |
3e680aae KH |
1372 | info = registered_fb[fbidx]; |
1373 | if (!info) | |
a65e5d78 | 1374 | request_module("fb%d", fbidx); |
3e680aae KH |
1375 | info = registered_fb[fbidx]; |
1376 | if (!info) | |
1377 | return -ENODEV; | |
1378 | mutex_lock(&info->lock); | |
fc7f687a JC |
1379 | if (!try_module_get(info->fbops->owner)) { |
1380 | res = -ENODEV; | |
1381 | goto out; | |
1382 | } | |
cae8a12f | 1383 | file->private_data = info; |
1da177e4 LT |
1384 | if (info->fbops->fb_open) { |
1385 | res = info->fbops->fb_open(info,1); | |
1386 | if (res) | |
1387 | module_put(info->fbops->owner); | |
1388 | } | |
d847471d IC |
1389 | #ifdef CONFIG_FB_DEFERRED_IO |
1390 | if (info->fbdefio) | |
1391 | fb_deferred_io_open(info, inode, file); | |
1392 | #endif | |
fc7f687a | 1393 | out: |
3e680aae | 1394 | mutex_unlock(&info->lock); |
1da177e4 LT |
1395 | return res; |
1396 | } | |
1397 | ||
1398 | static int | |
1399 | fb_release(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1400 | __acquires(&info->lock) |
1401 | __releases(&info->lock) | |
1da177e4 | 1402 | { |
cae8a12f | 1403 | struct fb_info * const info = file->private_data; |
1da177e4 | 1404 | |
3e680aae | 1405 | mutex_lock(&info->lock); |
1da177e4 LT |
1406 | if (info->fbops->fb_release) |
1407 | info->fbops->fb_release(info,1); | |
1408 | module_put(info->fbops->owner); | |
3e680aae | 1409 | mutex_unlock(&info->lock); |
1da177e4 LT |
1410 | return 0; |
1411 | } | |
1412 | ||
0128beee | 1413 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1414 | .owner = THIS_MODULE, |
1415 | .read = fb_read, | |
1416 | .write = fb_write, | |
e5367711 | 1417 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1418 | #ifdef CONFIG_COMPAT |
1419 | .compat_ioctl = fb_compat_ioctl, | |
1420 | #endif | |
1421 | .mmap = fb_mmap, | |
1422 | .open = fb_open, | |
1423 | .release = fb_release, | |
1424 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1425 | .get_unmapped_area = get_fb_unmapped_area, | |
1426 | #endif | |
5e841b88 PM |
1427 | #ifdef CONFIG_FB_DEFERRED_IO |
1428 | .fsync = fb_deferred_io_fsync, | |
1429 | #endif | |
1da177e4 LT |
1430 | }; |
1431 | ||
9a179176 AD |
1432 | struct class *fb_class; |
1433 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1434 | |
1435 | static int fb_check_foreignness(struct fb_info *fi) | |
1436 | { | |
1437 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1438 | ||
1439 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1440 | ||
1441 | #ifdef __BIG_ENDIAN | |
1442 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1443 | #else | |
1444 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1445 | #endif /* __BIG_ENDIAN */ | |
1446 | ||
1447 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1448 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1449 | "support this framebuffer\n", fi->fix.id); | |
1450 | return -ENOSYS; | |
1451 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1452 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1453 | "support this framebuffer\n", fi->fix.id); | |
1454 | return -ENOSYS; | |
1455 | } | |
1456 | ||
1457 | return 0; | |
1458 | } | |
1459 | ||
4410f391 DA |
1460 | static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw) |
1461 | { | |
1462 | /* is the generic aperture base the same as the HW one */ | |
1463 | if (gen->aperture_base == hw->aperture_base) | |
1464 | return true; | |
1465 | /* is the generic aperture base inside the hw base->hw base+size */ | |
1466 | if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size) | |
1467 | return true; | |
1468 | return false; | |
1469 | } | |
1da177e4 LT |
1470 | /** |
1471 | * register_framebuffer - registers a frame buffer device | |
1472 | * @fb_info: frame buffer info structure | |
1473 | * | |
1474 | * Registers a frame buffer device @fb_info. | |
1475 | * | |
1476 | * Returns negative errno on error, or zero for success. | |
1477 | * | |
1478 | */ | |
1479 | ||
1480 | int | |
1481 | register_framebuffer(struct fb_info *fb_info) | |
1482 | { | |
1483 | int i; | |
1484 | struct fb_event event; | |
96fe6a21 | 1485 | struct fb_videomode mode; |
1da177e4 LT |
1486 | |
1487 | if (num_registered_fb == FB_MAX) | |
1488 | return -ENXIO; | |
e4c690e0 AV |
1489 | |
1490 | if (fb_check_foreignness(fb_info)) | |
1491 | return -ENOSYS; | |
1492 | ||
4410f391 DA |
1493 | /* check all firmware fbs and kick off if the base addr overlaps */ |
1494 | for (i = 0 ; i < FB_MAX; i++) { | |
1495 | if (!registered_fb[i]) | |
1496 | continue; | |
1497 | ||
1498 | if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) { | |
1499 | if (fb_do_apertures_overlap(registered_fb[i], fb_info)) { | |
1500 | printk(KERN_ERR "fb: conflicting fb hw usage " | |
1501 | "%s vs %s - removing generic driver\n", | |
1502 | fb_info->fix.id, | |
1503 | registered_fb[i]->fix.id); | |
1504 | unregister_framebuffer(registered_fb[i]); | |
1505 | break; | |
1506 | } | |
1507 | } | |
1508 | } | |
1509 | ||
1da177e4 LT |
1510 | num_registered_fb++; |
1511 | for (i = 0 ; i < FB_MAX; i++) | |
1512 | if (!registered_fb[i]) | |
1513 | break; | |
1514 | fb_info->node = i; | |
6c96895e LT |
1515 | mutex_init(&fb_info->lock); |
1516 | mutex_init(&fb_info->mm_lock); | |
1da177e4 | 1517 | |
77997aaa GKH |
1518 | fb_info->dev = device_create(fb_class, fb_info->device, |
1519 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1520 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1521 | /* Not fatal */ |
78cde088 GKH |
1522 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1523 | fb_info->dev = NULL; | |
1da177e4 | 1524 | } else |
78cde088 | 1525 | fb_init_device(fb_info); |
1da177e4 LT |
1526 | |
1527 | if (fb_info->pixmap.addr == NULL) { | |
1528 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1529 | if (fb_info->pixmap.addr) { | |
1530 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1531 | fb_info->pixmap.buf_align = 1; | |
1532 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1533 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1534 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1535 | } | |
1536 | } | |
1537 | fb_info->pixmap.offset = 0; | |
1538 | ||
bf26ad72 AD |
1539 | if (!fb_info->pixmap.blit_x) |
1540 | fb_info->pixmap.blit_x = ~(u32)0; | |
1541 | ||
1542 | if (!fb_info->pixmap.blit_y) | |
1543 | fb_info->pixmap.blit_y = ~(u32)0; | |
1544 | ||
96fe6a21 | 1545 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1546 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1547 | |
96fe6a21 AD |
1548 | fb_var_to_videomode(&mode, &fb_info->var); |
1549 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1550 | registered_fb[i] = fb_info; |
1551 | ||
1da177e4 | 1552 | event.info = fb_info; |
513adb58 AR |
1553 | if (!lock_fb_info(fb_info)) |
1554 | return -ENODEV; | |
256154fb | 1555 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
513adb58 | 1556 | unlock_fb_info(fb_info); |
1da177e4 LT |
1557 | return 0; |
1558 | } | |
1559 | ||
1560 | ||
1561 | /** | |
1562 | * unregister_framebuffer - releases a frame buffer device | |
1563 | * @fb_info: frame buffer info structure | |
1564 | * | |
1565 | * Unregisters a frame buffer device @fb_info. | |
1566 | * | |
1567 | * Returns negative errno on error, or zero for success. | |
1568 | * | |
cfafca80 JB |
1569 | * This function will also notify the framebuffer console |
1570 | * to release the driver. | |
1571 | * | |
1572 | * This is meant to be called within a driver's module_exit() | |
1573 | * function. If this is called outside module_exit(), ensure | |
1574 | * that the driver implements fb_open() and fb_release() to | |
1575 | * check that no processes are using the device. | |
1da177e4 LT |
1576 | */ |
1577 | ||
1578 | int | |
1579 | unregister_framebuffer(struct fb_info *fb_info) | |
1580 | { | |
e614b18d | 1581 | struct fb_event event; |
cfafca80 | 1582 | int i, ret = 0; |
1da177e4 LT |
1583 | |
1584 | i = fb_info->node; | |
cfafca80 JB |
1585 | if (!registered_fb[i]) { |
1586 | ret = -EINVAL; | |
1587 | goto done; | |
1588 | } | |
1589 | ||
513adb58 AR |
1590 | |
1591 | if (!lock_fb_info(fb_info)) | |
1592 | return -ENODEV; | |
cfafca80 JB |
1593 | event.info = fb_info; |
1594 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
513adb58 | 1595 | unlock_fb_info(fb_info); |
cfafca80 JB |
1596 | |
1597 | if (ret) { | |
1598 | ret = -EINVAL; | |
1599 | goto done; | |
1600 | } | |
1da177e4 | 1601 | |
e614b18d AD |
1602 | if (fb_info->pixmap.addr && |
1603 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1604 | kfree(fb_info->pixmap.addr); |
1605 | fb_destroy_modelist(&fb_info->modelist); | |
1606 | registered_fb[i]=NULL; | |
1607 | num_registered_fb--; | |
78cde088 GKH |
1608 | fb_cleanup_device(fb_info); |
1609 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1610 | event.info = fb_info; |
256154fb | 1611 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
4410f391 DA |
1612 | |
1613 | /* this may free fb info */ | |
1614 | if (fb_info->fbops->fb_destroy) | |
1615 | fb_info->fbops->fb_destroy(fb_info); | |
cfafca80 JB |
1616 | done: |
1617 | return ret; | |
1da177e4 LT |
1618 | } |
1619 | ||
1da177e4 LT |
1620 | /** |
1621 | * fb_set_suspend - low level driver signals suspend | |
1622 | * @info: framebuffer affected | |
1623 | * @state: 0 = resuming, !=0 = suspending | |
1624 | * | |
1625 | * This is meant to be used by low level drivers to | |
1626 | * signal suspend/resume to the core & clients. | |
1627 | * It must be called with the console semaphore held | |
1628 | */ | |
1629 | void fb_set_suspend(struct fb_info *info, int state) | |
1630 | { | |
1631 | struct fb_event event; | |
1632 | ||
513adb58 AR |
1633 | if (!lock_fb_info(info)) |
1634 | return; | |
1da177e4 LT |
1635 | event.info = info; |
1636 | if (state) { | |
256154fb | 1637 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1638 | info->state = FBINFO_STATE_SUSPENDED; |
1639 | } else { | |
1640 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1641 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 | 1642 | } |
513adb58 | 1643 | unlock_fb_info(info); |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | /** | |
1647 | * fbmem_init - init frame buffer subsystem | |
1648 | * | |
1649 | * Initialize the frame buffer subsystem. | |
1650 | * | |
1651 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1652 | * | |
1653 | */ | |
1654 | ||
1655 | static int __init | |
1656 | fbmem_init(void) | |
1657 | { | |
0aa16341 | 1658 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1659 | |
1da177e4 LT |
1660 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1661 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1662 | ||
56b22935 | 1663 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1664 | if (IS_ERR(fb_class)) { |
1665 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1666 | fb_class = NULL; | |
1667 | } | |
1668 | return 0; | |
1669 | } | |
1670 | ||
1671 | #ifdef MODULE | |
1672 | module_init(fbmem_init); | |
1673 | static void __exit | |
1674 | fbmem_exit(void) | |
1675 | { | |
c43f89c2 | 1676 | remove_proc_entry("fb", NULL); |
56b22935 | 1677 | class_destroy(fb_class); |
5a340cce | 1678 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1679 | } |
1680 | ||
1681 | module_exit(fbmem_exit); | |
1682 | MODULE_LICENSE("GPL"); | |
1683 | MODULE_DESCRIPTION("Framebuffer base"); | |
1684 | #else | |
1685 | subsys_initcall(fbmem_init); | |
1686 | #endif | |
1687 | ||
1688 | int fb_new_modelist(struct fb_info *info) | |
1689 | { | |
1690 | struct fb_event event; | |
1691 | struct fb_var_screeninfo var = info->var; | |
1692 | struct list_head *pos, *n; | |
1693 | struct fb_modelist *modelist; | |
1694 | struct fb_videomode *m, mode; | |
1695 | int err = 1; | |
1696 | ||
1697 | list_for_each_safe(pos, n, &info->modelist) { | |
1698 | modelist = list_entry(pos, struct fb_modelist, list); | |
1699 | m = &modelist->mode; | |
1700 | fb_videomode_to_var(&var, m); | |
1701 | var.activate = FB_ACTIVATE_TEST; | |
1702 | err = fb_set_var(info, &var); | |
1703 | fb_var_to_videomode(&mode, &var); | |
1704 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1705 | list_del(pos); | |
1706 | kfree(pos); | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | err = 1; | |
1711 | ||
1712 | if (!list_empty(&info->modelist)) { | |
513adb58 AR |
1713 | if (!lock_fb_info(info)) |
1714 | return -ENODEV; | |
1da177e4 | 1715 | event.info = info; |
256154fb | 1716 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
513adb58 | 1717 | unlock_fb_info(info); |
1da177e4 LT |
1718 | } |
1719 | ||
1720 | return err; | |
1721 | } | |
1722 | ||
0128beee HD |
1723 | static char *video_options[FB_MAX] __read_mostly; |
1724 | static int ofonly __read_mostly; | |
1da177e4 LT |
1725 | |
1726 | /** | |
1727 | * fb_get_options - get kernel boot parameters | |
1728 | * @name: framebuffer name as it would appear in | |
1729 | * the boot parameter line | |
1730 | * (video=<name>:<options>) | |
1731 | * @option: the option will be stored here | |
1732 | * | |
1733 | * NOTE: Needed to maintain backwards compatibility | |
1734 | */ | |
1735 | int fb_get_options(char *name, char **option) | |
1736 | { | |
1737 | char *opt, *options = NULL; | |
1738 | int opt_len, retval = 0; | |
1739 | int name_len = strlen(name), i; | |
1740 | ||
1741 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1742 | retval = 1; | |
1743 | ||
1744 | if (name_len && !retval) { | |
1745 | for (i = 0; i < FB_MAX; i++) { | |
1746 | if (video_options[i] == NULL) | |
1747 | continue; | |
1748 | opt_len = strlen(video_options[i]); | |
1749 | if (!opt_len) | |
1750 | continue; | |
1751 | opt = video_options[i]; | |
1752 | if (!strncmp(name, opt, name_len) && | |
1753 | opt[name_len] == ':') | |
1754 | options = opt + name_len + 1; | |
1755 | } | |
1756 | } | |
1757 | if (options && !strncmp(options, "off", 3)) | |
1758 | retval = 1; | |
1759 | ||
1760 | if (option) | |
1761 | *option = options; | |
1762 | ||
1763 | return retval; | |
1764 | } | |
1765 | ||
bc6d7fdf | 1766 | #ifndef MODULE |
1da177e4 LT |
1767 | /** |
1768 | * video_setup - process command line options | |
1769 | * @options: string of options | |
1770 | * | |
1771 | * Process command line options for frame buffer subsystem. | |
1772 | * | |
1773 | * NOTE: This function is a __setup and __init function. | |
1774 | * It only stores the options. Drivers have to call | |
1775 | * fb_get_options() as necessary. | |
1776 | * | |
1777 | * Returns zero. | |
1778 | * | |
1779 | */ | |
75c96f85 | 1780 | static int __init video_setup(char *options) |
1da177e4 LT |
1781 | { |
1782 | int i, global = 0; | |
1783 | ||
1784 | if (!options || !*options) | |
1785 | global = 1; | |
1786 | ||
1787 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1788 | ofonly = 1; | |
1789 | global = 1; | |
1790 | } | |
1791 | ||
1792 | if (!global && !strstr(options, "fb:")) { | |
9a054fba | 1793 | fb_mode_option = options; |
1da177e4 LT |
1794 | global = 1; |
1795 | } | |
1796 | ||
1797 | if (!global) { | |
1798 | for (i = 0; i < FB_MAX; i++) { | |
1799 | if (video_options[i] == NULL) { | |
1800 | video_options[i] = options; | |
1801 | break; | |
1802 | } | |
1803 | ||
1804 | } | |
1805 | } | |
1806 | ||
9b41046c | 1807 | return 1; |
1da177e4 LT |
1808 | } |
1809 | __setup("video=", video_setup); | |
bc6d7fdf | 1810 | #endif |
1da177e4 LT |
1811 | |
1812 | /* | |
1813 | * Visible symbols for modules | |
1814 | */ | |
1815 | ||
1816 | EXPORT_SYMBOL(register_framebuffer); | |
1817 | EXPORT_SYMBOL(unregister_framebuffer); | |
1818 | EXPORT_SYMBOL(num_registered_fb); | |
1819 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1820 | EXPORT_SYMBOL(fb_show_logo); |
1821 | EXPORT_SYMBOL(fb_set_var); | |
1822 | EXPORT_SYMBOL(fb_blank); | |
1823 | EXPORT_SYMBOL(fb_pan_display); | |
1824 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1825 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1826 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1827 | |
1828 | MODULE_LICENSE("GPL"); |