Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/fbmem.c | |
3 | * | |
4 | * Copyright (C) 1994 Martin Schaller | |
5 | * | |
6 | * 2001 - Documented with DocBook | |
7 | * - Brad Douglas <brad@neruo.com> | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General Public | |
10 | * License. See the file COPYING in the main directory of this archive | |
11 | * for more details. | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/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 | ||
698b3682 | 45 | static DEFINE_MUTEX(registration_lock); |
0128beee HD |
46 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
47 | int num_registered_fb __read_mostly; | |
1da177e4 | 48 | |
698b3682 LT |
49 | static struct fb_info *get_fb_info(unsigned int idx) |
50 | { | |
51 | struct fb_info *fb_info; | |
52 | ||
53 | if (idx >= FB_MAX) | |
54 | return ERR_PTR(-ENODEV); | |
55 | ||
56 | mutex_lock(®istration_lock); | |
57 | fb_info = registered_fb[idx]; | |
58 | if (fb_info) | |
59 | atomic_inc(&fb_info->count); | |
60 | mutex_unlock(®istration_lock); | |
61 | ||
62 | return fb_info; | |
63 | } | |
64 | ||
65 | static void put_fb_info(struct fb_info *fb_info) | |
66 | { | |
67 | if (!atomic_dec_and_test(&fb_info->count)) | |
68 | return; | |
69 | if (fb_info->fbops->fb_destroy) | |
70 | fb_info->fbops->fb_destroy(fb_info); | |
71 | } | |
72 | ||
6a7f2829 AM |
73 | int lock_fb_info(struct fb_info *info) |
74 | { | |
75 | mutex_lock(&info->lock); | |
76 | if (!info->fbops) { | |
77 | mutex_unlock(&info->lock); | |
78 | return 0; | |
79 | } | |
80 | return 1; | |
81 | } | |
82 | EXPORT_SYMBOL(lock_fb_info); | |
83 | ||
1da177e4 LT |
84 | /* |
85 | * Helpers | |
86 | */ | |
87 | ||
b8c90945 AD |
88 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
89 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 90 | { |
b8c90945 AD |
91 | int depth = 0; |
92 | ||
93 | if (fix->visual == FB_VISUAL_MONO01 || | |
94 | fix->visual == FB_VISUAL_MONO10) | |
95 | depth = 1; | |
96 | else { | |
97 | if (var->green.length == var->blue.length && | |
98 | var->green.length == var->red.length && | |
99 | var->green.offset == var->blue.offset && | |
100 | var->green.offset == var->red.offset) | |
101 | depth = var->green.length; | |
102 | else | |
103 | depth = var->green.length + var->red.length + | |
104 | var->blue.length; | |
105 | } | |
106 | ||
107 | return depth; | |
1da177e4 LT |
108 | } |
109 | EXPORT_SYMBOL(fb_get_color_depth); | |
110 | ||
111 | /* | |
f5a9951c | 112 | * Data padding functions. |
1da177e4 | 113 | */ |
f1ab5dac | 114 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 115 | { |
829e79b6 | 116 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 117 | } |
f1ab5dac | 118 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 119 | |
f1ab5dac JS |
120 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
121 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
122 | { |
123 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
124 | int i, j; | |
125 | ||
126 | for (i = height; i--; ) { | |
127 | for (j = 0; j < idx; j++) { | |
128 | tmp = dst[j]; | |
129 | tmp &= mask; | |
130 | tmp |= *src >> shift_low; | |
131 | dst[j] = tmp; | |
132 | tmp = *src << shift_high; | |
133 | dst[j+1] = tmp; | |
134 | src++; | |
135 | } | |
136 | tmp = dst[idx]; | |
137 | tmp &= mask; | |
138 | tmp |= *src >> shift_low; | |
139 | dst[idx] = tmp; | |
140 | if (shift_high < mod) { | |
141 | tmp = *src << shift_high; | |
142 | dst[idx+1] = tmp; | |
143 | } | |
144 | src++; | |
145 | dst += d_pitch; | |
146 | } | |
147 | } | |
f1ab5dac | 148 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
149 | |
150 | /* | |
151 | * we need to lock this section since fb_cursor | |
152 | * may use fb_imageblit() | |
153 | */ | |
154 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
155 | { | |
156 | u32 align = buf->buf_align - 1, offset; | |
157 | char *addr = buf->addr; | |
158 | ||
159 | /* If IO mapped, we need to sync before access, no sharing of | |
160 | * the pixmap is done | |
161 | */ | |
162 | if (buf->flags & FB_PIXMAP_IO) { | |
163 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
164 | info->fbops->fb_sync(info); | |
165 | return addr; | |
166 | } | |
167 | ||
168 | /* See if we fit in the remaining pixmap space */ | |
169 | offset = buf->offset + align; | |
170 | offset &= ~align; | |
171 | if (offset + size > buf->size) { | |
172 | /* We do not fit. In order to be able to re-use the buffer, | |
173 | * we must ensure no asynchronous DMA'ing or whatever operation | |
174 | * is in progress, we sync for that. | |
175 | */ | |
176 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
177 | info->fbops->fb_sync(info); | |
178 | offset = 0; | |
179 | } | |
180 | buf->offset = offset + size; | |
181 | addr += offset; | |
182 | ||
183 | return addr; | |
184 | } | |
185 | ||
186 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
187 | |
188 | static inline unsigned safe_shift(unsigned d, int n) | |
189 | { | |
190 | return n < 0 ? d >> -n : d << n; | |
191 | } | |
192 | ||
193 | static void fb_set_logocmap(struct fb_info *info, | |
194 | const struct linux_logo *logo) | |
195 | { | |
196 | struct fb_cmap palette_cmap; | |
197 | u16 palette_green[16]; | |
198 | u16 palette_blue[16]; | |
199 | u16 palette_red[16]; | |
200 | int i, j, n; | |
201 | const unsigned char *clut = logo->clut; | |
202 | ||
203 | palette_cmap.start = 0; | |
204 | palette_cmap.len = 16; | |
205 | palette_cmap.red = palette_red; | |
206 | palette_cmap.green = palette_green; | |
207 | palette_cmap.blue = palette_blue; | |
208 | palette_cmap.transp = NULL; | |
209 | ||
210 | for (i = 0; i < logo->clutsize; i += n) { | |
211 | n = logo->clutsize - i; | |
212 | /* palette_cmap provides space for only 16 colors at once */ | |
213 | if (n > 16) | |
214 | n = 16; | |
215 | palette_cmap.start = 32 + i; | |
216 | palette_cmap.len = n; | |
217 | for (j = 0; j < n; ++j) { | |
218 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
219 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
220 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
221 | clut += 3; | |
222 | } | |
223 | fb_set_cmap(&palette_cmap, info); | |
224 | } | |
225 | } | |
226 | ||
227 | static void fb_set_logo_truepalette(struct fb_info *info, | |
228 | const struct linux_logo *logo, | |
229 | u32 *palette) | |
230 | { | |
0128beee | 231 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
232 | unsigned char redmask, greenmask, bluemask; |
233 | int redshift, greenshift, blueshift; | |
234 | int i; | |
235 | const unsigned char *clut = logo->clut; | |
236 | ||
237 | /* | |
238 | * We have to create a temporary palette since console palette is only | |
239 | * 16 colors long. | |
240 | */ | |
241 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
242 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
243 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
244 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
245 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
246 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
247 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
248 | ||
249 | for ( i = 0; i < logo->clutsize; i++) { | |
250 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
251 | safe_shift((clut[1] & greenmask), greenshift) | | |
252 | safe_shift((clut[2] & bluemask), blueshift)); | |
253 | clut += 3; | |
254 | } | |
255 | } | |
256 | ||
257 | static void fb_set_logo_directpalette(struct fb_info *info, | |
258 | const struct linux_logo *logo, | |
259 | u32 *palette) | |
260 | { | |
261 | int redshift, greenshift, blueshift; | |
262 | int i; | |
263 | ||
264 | redshift = info->var.red.offset; | |
265 | greenshift = info->var.green.offset; | |
266 | blueshift = info->var.blue.offset; | |
267 | ||
cf7ee554 | 268 | for (i = 32; i < 32 + logo->clutsize; i++) |
1da177e4 LT |
269 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
270 | } | |
271 | ||
272 | static void fb_set_logo(struct fb_info *info, | |
273 | const struct linux_logo *logo, u8 *dst, | |
274 | int depth) | |
275 | { | |
b8c90945 | 276 | int i, j, k; |
1da177e4 | 277 | const u8 *src = logo->data; |
b8c90945 AD |
278 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
279 | u8 fg = 1, d; | |
1da177e4 | 280 | |
1692b37c AD |
281 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
282 | case 1: | |
283 | fg = 1; | |
284 | break; | |
285 | case 2: | |
286 | fg = 3; | |
287 | break; | |
288 | default: | |
1da177e4 | 289 | fg = 7; |
1692b37c AD |
290 | break; |
291 | } | |
1da177e4 | 292 | |
b8c90945 AD |
293 | if (info->fix.visual == FB_VISUAL_MONO01 || |
294 | info->fix.visual == FB_VISUAL_MONO10) | |
295 | fg = ~((u8) (0xfff << info->var.green.length)); | |
296 | ||
1da177e4 LT |
297 | switch (depth) { |
298 | case 4: | |
299 | for (i = 0; i < logo->height; i++) | |
300 | for (j = 0; j < logo->width; src++) { | |
301 | *dst++ = *src >> 4; | |
302 | j++; | |
303 | if (j < logo->width) { | |
304 | *dst++ = *src & 0x0f; | |
305 | j++; | |
306 | } | |
307 | } | |
308 | break; | |
309 | case 1: | |
310 | for (i = 0; i < logo->height; i++) { | |
311 | for (j = 0; j < logo->width; src++) { | |
312 | d = *src ^ xor; | |
313 | for (k = 7; k >= 0; k--) { | |
314 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
315 | j++; | |
316 | } | |
317 | } | |
318 | } | |
319 | break; | |
320 | } | |
321 | } | |
322 | ||
323 | /* | |
324 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
325 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
326 | * the visual format and color depth of the framebuffer, the DAC, the | |
327 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
328 | * | |
329 | * Case 1 - linux_logo_clut224: | |
330 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
331 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
332 | * | |
333 | * For visuals that require color info from the pseudo_palette, we also construct | |
334 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
335 | * will be set. | |
336 | * | |
337 | * Case 2 - linux_logo_vga16: | |
338 | * The number of colors just matches the console colors, thus there is no need | |
339 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
340 | * each byte contains color information for two pixels (upper and lower nibble). | |
341 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
342 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
343 | * | |
344 | * Case 3 - linux_logo_mono: | |
345 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
346 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
347 | * be set to 1. | |
348 | */ | |
349 | static struct logo_data { | |
350 | int depth; | |
351 | int needs_directpalette; | |
352 | int needs_truepalette; | |
353 | int needs_cmapreset; | |
354 | const struct linux_logo *logo; | |
0128beee | 355 | } fb_logo __read_mostly; |
1da177e4 | 356 | |
9c44e5f6 AD |
357 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
358 | { | |
359 | u32 size = width * height, i; | |
360 | ||
361 | out += size - 1; | |
362 | ||
363 | for (i = size; i--; ) | |
364 | *out-- = *in++; | |
365 | } | |
366 | ||
367 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
368 | { | |
f837e6f7 | 369 | int i, j, h = height - 1; |
9c44e5f6 AD |
370 | |
371 | for (i = 0; i < height; i++) | |
372 | for (j = 0; j < width; j++) | |
f837e6f7 | 373 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
374 | } |
375 | ||
376 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
377 | { | |
378 | int i, j, w = width - 1; | |
379 | ||
380 | for (i = 0; i < height; i++) | |
381 | for (j = 0; j < width; j++) | |
382 | out[height * (w - j) + i] = *in++; | |
383 | } | |
384 | ||
385 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
386 | struct fb_image *image, int rotate) | |
387 | { | |
388 | u32 tmp; | |
389 | ||
390 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
391 | fb_rotate_logo_ud(image->data, dst, image->width, |
392 | image->height); | |
abed5d15 GU |
393 | image->dx = info->var.xres - image->width - image->dx; |
394 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 395 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
396 | fb_rotate_logo_cw(image->data, dst, image->width, |
397 | image->height); | |
9c44e5f6 AD |
398 | tmp = image->width; |
399 | image->width = image->height; | |
400 | image->height = tmp; | |
abed5d15 GU |
401 | tmp = image->dy; |
402 | image->dy = image->dx; | |
403 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 404 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
405 | fb_rotate_logo_ccw(image->data, dst, image->width, |
406 | image->height); | |
f837e6f7 AD |
407 | tmp = image->width; |
408 | image->width = image->height; | |
409 | image->height = tmp; | |
abed5d15 GU |
410 | tmp = image->dx; |
411 | image->dx = image->dy; | |
412 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
413 | } |
414 | ||
415 | image->data = dst; | |
416 | } | |
417 | ||
418 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 419 | int rotate, unsigned int num) |
9c44e5f6 | 420 | { |
448d4797 | 421 | unsigned int x; |
9c44e5f6 AD |
422 | |
423 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
424 | for (x = 0; |
425 | x < num && image->dx + image->width <= info->var.xres; | |
426 | x++) { | |
9c44e5f6 | 427 | info->fbops->fb_imageblit(info, image); |
448d4797 | 428 | image->dx += image->width + 8; |
9c44e5f6 AD |
429 | } |
430 | } else if (rotate == FB_ROTATE_UD) { | |
448d4797 | 431 | for (x = 0; x < num && image->dx >= 0; x++) { |
9c44e5f6 | 432 | info->fbops->fb_imageblit(info, image); |
448d4797 | 433 | image->dx -= image->width + 8; |
9c44e5f6 AD |
434 | } |
435 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
436 | for (x = 0; |
437 | x < num && image->dy + image->height <= info->var.yres; | |
438 | x++) { | |
9c44e5f6 | 439 | info->fbops->fb_imageblit(info, image); |
448d4797 | 440 | image->dy += image->height + 8; |
9c44e5f6 AD |
441 | } |
442 | } else if (rotate == FB_ROTATE_CCW) { | |
448d4797 | 443 | for (x = 0; x < num && image->dy >= 0; x++) { |
9c44e5f6 | 444 | info->fbops->fb_imageblit(info, image); |
448d4797 | 445 | image->dy -= image->height + 8; |
9c44e5f6 AD |
446 | } |
447 | } | |
448 | } | |
449 | ||
90da63e5 GU |
450 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
451 | const struct linux_logo *logo, int y, | |
452 | unsigned int n) | |
1da177e4 LT |
453 | { |
454 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 455 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 456 | struct fb_image image; |
1da177e4 LT |
457 | |
458 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 459 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 460 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
461 | return 0; |
462 | ||
463 | image.depth = 8; | |
90da63e5 | 464 | image.data = logo->data; |
1da177e4 LT |
465 | |
466 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 467 | fb_set_logocmap(info, logo); |
1da177e4 | 468 | |
9900abfb | 469 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
470 | fb_logo.needs_directpalette) { |
471 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
472 | if (palette == NULL) | |
473 | return 0; | |
474 | ||
475 | if (fb_logo.needs_truepalette) | |
90da63e5 | 476 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 477 | else |
90da63e5 | 478 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
479 | |
480 | saved_pseudo_palette = info->pseudo_palette; | |
481 | info->pseudo_palette = palette; | |
482 | } | |
483 | ||
484 | if (fb_logo.depth <= 4) { | |
90da63e5 | 485 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
486 | if (logo_new == NULL) { |
487 | kfree(palette); | |
488 | if (saved_pseudo_palette) | |
489 | info->pseudo_palette = saved_pseudo_palette; | |
490 | return 0; | |
491 | } | |
492 | image.data = logo_new; | |
90da63e5 | 493 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
494 | } |
495 | ||
9c44e5f6 | 496 | image.dx = 0; |
90da63e5 GU |
497 | image.dy = y; |
498 | image.width = logo->width; | |
499 | image.height = logo->height; | |
1da177e4 | 500 | |
9c44e5f6 | 501 | if (rotate) { |
90da63e5 GU |
502 | logo_rotate = kmalloc(logo->width * |
503 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
504 | if (logo_rotate) |
505 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 506 | } |
9c44e5f6 | 507 | |
90da63e5 | 508 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 509 | |
1da177e4 LT |
510 | kfree(palette); |
511 | if (saved_pseudo_palette != NULL) | |
512 | info->pseudo_palette = saved_pseudo_palette; | |
513 | kfree(logo_new); | |
9c44e5f6 | 514 | kfree(logo_rotate); |
90da63e5 GU |
515 | return logo->height; |
516 | } | |
517 | ||
9900abfb GU |
518 | |
519 | #ifdef CONFIG_FB_LOGO_EXTRA | |
520 | ||
521 | #define FB_LOGO_EX_NUM_MAX 10 | |
522 | static struct logo_data_extra { | |
523 | const struct linux_logo *logo; | |
524 | unsigned int n; | |
525 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
526 | static unsigned int fb_logo_ex_num; | |
527 | ||
528 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
529 | { | |
530 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
531 | return; | |
532 | ||
533 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
534 | fb_logo_ex[fb_logo_ex_num].n = n; | |
535 | fb_logo_ex_num++; | |
536 | } | |
537 | ||
538 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
539 | unsigned int yres) | |
540 | { | |
541 | unsigned int i; | |
542 | ||
543 | /* FIXME: logo_ex supports only truecolor fb. */ | |
544 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
545 | fb_logo_ex_num = 0; | |
546 | ||
547 | for (i = 0; i < fb_logo_ex_num; i++) { | |
4fb6de25 GU |
548 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
549 | fb_logo_ex[i].logo = NULL; | |
550 | continue; | |
551 | } | |
9900abfb GU |
552 | height += fb_logo_ex[i].logo->height; |
553 | if (height > yres) { | |
554 | height -= fb_logo_ex[i].logo->height; | |
555 | fb_logo_ex_num = i; | |
556 | break; | |
557 | } | |
558 | } | |
559 | return height; | |
560 | } | |
561 | ||
562 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
563 | { | |
564 | unsigned int i; | |
565 | ||
566 | for (i = 0; i < fb_logo_ex_num; i++) | |
567 | y += fb_show_logo_line(info, rotate, | |
568 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
569 | ||
570 | return y; | |
571 | } | |
572 | ||
573 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
574 | ||
575 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
576 | unsigned int height, | |
577 | unsigned int yres) | |
578 | { | |
579 | return height; | |
580 | } | |
581 | ||
582 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
583 | { | |
584 | return y; | |
585 | } | |
586 | ||
587 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
588 | ||
589 | ||
590 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
591 | { | |
592 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
593 | unsigned int yres; | |
594 | ||
595 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
596 | ||
597 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
598 | info->flags & FBINFO_MODULE) | |
599 | return 0; | |
600 | ||
601 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
602 | depth = info->var.blue.length; | |
603 | if (info->var.red.length < depth) | |
604 | depth = info->var.red.length; | |
605 | if (info->var.green.length < depth) | |
606 | depth = info->var.green.length; | |
607 | } | |
608 | ||
609 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
610 | /* assume console colormap */ | |
611 | depth = 4; | |
612 | } | |
613 | ||
9900abfb GU |
614 | /* Return if no suitable logo was found */ |
615 | fb_logo.logo = fb_find_logo(depth); | |
616 | ||
617 | if (!fb_logo.logo) { | |
618 | return 0; | |
619 | } | |
620 | ||
621 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
622 | yres = info->var.yres; | |
623 | else | |
624 | yres = info->var.xres; | |
625 | ||
626 | if (fb_logo.logo->height > yres) { | |
627 | fb_logo.logo = NULL; | |
628 | return 0; | |
629 | } | |
630 | ||
631 | /* What depth we asked for might be different from what we get */ | |
632 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
633 | fb_logo.depth = 8; | |
634 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
635 | fb_logo.depth = 4; | |
636 | else | |
637 | fb_logo.depth = 1; | |
638 | ||
1692b37c AD |
639 | |
640 | if (fb_logo.depth > 4 && depth > 4) { | |
641 | switch (info->fix.visual) { | |
642 | case FB_VISUAL_TRUECOLOR: | |
643 | fb_logo.needs_truepalette = 1; | |
644 | break; | |
645 | case FB_VISUAL_DIRECTCOLOR: | |
646 | fb_logo.needs_directpalette = 1; | |
647 | fb_logo.needs_cmapreset = 1; | |
648 | break; | |
649 | case FB_VISUAL_PSEUDOCOLOR: | |
650 | fb_logo.needs_cmapreset = 1; | |
651 | break; | |
652 | } | |
653 | } | |
654 | ||
9900abfb GU |
655 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
656 | } | |
657 | ||
90da63e5 GU |
658 | int fb_show_logo(struct fb_info *info, int rotate) |
659 | { | |
9900abfb GU |
660 | int y; |
661 | ||
662 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
663 | num_online_cpus()); | |
664 | y = fb_show_extra_logos(info, y, rotate); | |
665 | ||
666 | return y; | |
1da177e4 LT |
667 | } |
668 | #else | |
9c44e5f6 AD |
669 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
670 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
671 | #endif /* CONFIG_LOGO */ |
672 | ||
0aa16341 AD |
673 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
674 | { | |
698b3682 | 675 | mutex_lock(®istration_lock); |
0aa16341 AD |
676 | return (*pos < FB_MAX) ? pos : NULL; |
677 | } | |
678 | ||
679 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
680 | { | |
681 | (*pos)++; | |
682 | return (*pos < FB_MAX) ? pos : NULL; | |
683 | } | |
684 | ||
685 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 686 | { |
698b3682 | 687 | mutex_unlock(®istration_lock); |
1da177e4 LT |
688 | } |
689 | ||
0aa16341 AD |
690 | static int fb_seq_show(struct seq_file *m, void *v) |
691 | { | |
692 | int i = *(loff_t *)v; | |
693 | struct fb_info *fi = registered_fb[i]; | |
694 | ||
695 | if (fi) | |
696 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static const struct seq_operations proc_fb_seq_ops = { | |
701 | .start = fb_seq_start, | |
702 | .next = fb_seq_next, | |
703 | .stop = fb_seq_stop, | |
704 | .show = fb_seq_show, | |
705 | }; | |
706 | ||
707 | static int proc_fb_open(struct inode *inode, struct file *file) | |
708 | { | |
709 | return seq_open(file, &proc_fb_seq_ops); | |
710 | } | |
711 | ||
712 | static const struct file_operations fb_proc_fops = { | |
713 | .owner = THIS_MODULE, | |
714 | .open = proc_fb_open, | |
715 | .read = seq_read, | |
716 | .llseek = seq_lseek, | |
717 | .release = seq_release, | |
718 | }; | |
719 | ||
c47747fd LT |
720 | /* |
721 | * We hold a reference to the fb_info in file->private_data, | |
722 | * but if the current registered fb has changed, we don't | |
723 | * actually want to use it. | |
724 | * | |
725 | * So look up the fb_info using the inode minor number, | |
726 | * and just verify it against the reference we have. | |
727 | */ | |
728 | static struct fb_info *file_fb_info(struct file *file) | |
1da177e4 | 729 | { |
ad9a824e | 730 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
731 | int fbidx = iminor(inode); |
732 | struct fb_info *info = registered_fb[fbidx]; | |
c47747fd LT |
733 | |
734 | if (info != file->private_data) | |
735 | info = NULL; | |
736 | return info; | |
737 | } | |
738 | ||
739 | static ssize_t | |
740 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
741 | { | |
742 | unsigned long p = *ppos; | |
743 | struct fb_info *info = file_fb_info(file); | |
f11b478d JH |
744 | u8 *buffer, *dst; |
745 | u8 __iomem *src; | |
746 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
747 | unsigned long total_size; |
748 | ||
749 | if (!info || ! info->screen_base) | |
750 | return -ENODEV; | |
751 | ||
752 | if (info->state != FBINFO_STATE_RUNNING) | |
753 | return -EPERM; | |
754 | ||
755 | if (info->fbops->fb_read) | |
3f9b0880 | 756 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
757 | |
758 | total_size = info->screen_size; | |
0a484a3a | 759 | |
1da177e4 LT |
760 | if (total_size == 0) |
761 | total_size = info->fix.smem_len; | |
762 | ||
763 | if (p >= total_size) | |
0a484a3a AD |
764 | return 0; |
765 | ||
1da177e4 | 766 | if (count >= total_size) |
0a484a3a AD |
767 | count = total_size; |
768 | ||
1da177e4 LT |
769 | if (count + p > total_size) |
770 | count = total_size - p; | |
771 | ||
1da177e4 LT |
772 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
773 | GFP_KERNEL); | |
774 | if (!buffer) | |
775 | return -ENOMEM; | |
776 | ||
f11b478d | 777 | src = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
778 | |
779 | if (info->fbops->fb_sync) | |
780 | info->fbops->fb_sync(info); | |
781 | ||
782 | while (count) { | |
783 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
784 | dst = buffer; | |
f11b478d JH |
785 | fb_memcpy_fromfb(dst, src, c); |
786 | dst += c; | |
787 | src += c; | |
1da177e4 LT |
788 | |
789 | if (copy_to_user(buf, buffer, c)) { | |
790 | err = -EFAULT; | |
791 | break; | |
792 | } | |
793 | *ppos += c; | |
794 | buf += c; | |
795 | cnt += c; | |
796 | count -= c; | |
797 | } | |
798 | ||
799 | kfree(buffer); | |
0a484a3a | 800 | |
1da177e4 LT |
801 | return (err) ? err : cnt; |
802 | } | |
803 | ||
804 | static ssize_t | |
805 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
806 | { | |
807 | unsigned long p = *ppos; | |
c47747fd | 808 | struct fb_info *info = file_fb_info(file); |
f11b478d JH |
809 | u8 *buffer, *src; |
810 | u8 __iomem *dst; | |
811 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
812 | unsigned long total_size; |
813 | ||
814 | if (!info || !info->screen_base) | |
815 | return -ENODEV; | |
816 | ||
817 | if (info->state != FBINFO_STATE_RUNNING) | |
818 | return -EPERM; | |
819 | ||
820 | if (info->fbops->fb_write) | |
3f9b0880 | 821 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
822 | |
823 | total_size = info->screen_size; | |
0a484a3a | 824 | |
1da177e4 LT |
825 | if (total_size == 0) |
826 | total_size = info->fix.smem_len; | |
827 | ||
828 | if (p > total_size) | |
6a2a8866 | 829 | return -EFBIG; |
0a484a3a | 830 | |
6a2a8866 AD |
831 | if (count > total_size) { |
832 | err = -EFBIG; | |
0a484a3a | 833 | count = total_size; |
6a2a8866 AD |
834 | } |
835 | ||
836 | if (count + p > total_size) { | |
837 | if (!err) | |
838 | err = -ENOSPC; | |
0a484a3a | 839 | |
0a484a3a | 840 | count = total_size - p; |
6a2a8866 | 841 | } |
0a484a3a | 842 | |
1da177e4 LT |
843 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
844 | GFP_KERNEL); | |
845 | if (!buffer) | |
846 | return -ENOMEM; | |
847 | ||
f11b478d | 848 | dst = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
849 | |
850 | if (info->fbops->fb_sync) | |
851 | info->fbops->fb_sync(info); | |
852 | ||
853 | while (count) { | |
854 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
855 | src = buffer; | |
0a484a3a | 856 | |
1da177e4 LT |
857 | if (copy_from_user(src, buf, c)) { |
858 | err = -EFAULT; | |
859 | break; | |
860 | } | |
0a484a3a | 861 | |
f11b478d JH |
862 | fb_memcpy_tofb(dst, src, c); |
863 | dst += c; | |
864 | src += c; | |
1da177e4 LT |
865 | *ppos += c; |
866 | buf += c; | |
867 | cnt += c; | |
868 | count -= c; | |
869 | } | |
0a484a3a | 870 | |
1da177e4 LT |
871 | kfree(buffer); |
872 | ||
6a2a8866 | 873 | return (cnt) ? cnt : err; |
1da177e4 LT |
874 | } |
875 | ||
1da177e4 LT |
876 | int |
877 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
878 | { | |
1207069f | 879 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
880 | unsigned int yres = info->var.yres; |
881 | int err = 0; | |
1207069f AD |
882 | |
883 | if (var->yoffset > 0) { | |
884 | if (var->vmode & FB_VMODE_YWRAP) { | |
885 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
886 | err = -EINVAL; | |
887 | else | |
888 | yres = 0; | |
889 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
890 | err = -EINVAL; | |
891 | } | |
892 | ||
893 | if (var->xoffset > 0 && (!fix->xpanstep || | |
894 | (var->xoffset % fix->xpanstep))) | |
895 | err = -EINVAL; | |
896 | ||
7572a1ea | 897 | if (err || !info->fbops->fb_pan_display || |
99e9e7d6 FTS |
898 | var->yoffset > info->var.yres_virtual - yres || |
899 | var->xoffset > info->var.xres_virtual - info->var.xres) | |
1207069f | 900 | return -EINVAL; |
1da177e4 | 901 | |
1da177e4 LT |
902 | if ((err = info->fbops->fb_pan_display(var, info))) |
903 | return err; | |
c9c62dce JH |
904 | info->var.xoffset = var->xoffset; |
905 | info->var.yoffset = var->yoffset; | |
906 | if (var->vmode & FB_VMODE_YWRAP) | |
907 | info->var.vmode |= FB_VMODE_YWRAP; | |
908 | else | |
909 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
910 | return 0; | |
1da177e4 LT |
911 | } |
912 | ||
38a3dc51 AD |
913 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
914 | u32 activate) | |
915 | { | |
916 | struct fb_event event; | |
917 | struct fb_blit_caps caps, fbcaps; | |
918 | int err = 0; | |
919 | ||
920 | memset(&caps, 0, sizeof(caps)); | |
921 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
922 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
923 | event.info = info; | |
924 | event.data = ∩︀ | |
925 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
926 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
927 | ||
928 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
929 | ((fbcaps.y ^ caps.y) & caps.y) || | |
930 | (fbcaps.len < caps.len)) | |
931 | err = -EINVAL; | |
932 | ||
933 | return err; | |
934 | } | |
935 | ||
1da177e4 LT |
936 | int |
937 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
938 | { | |
b1e7223f AD |
939 | int flags = info->flags; |
940 | int ret = 0; | |
1da177e4 LT |
941 | |
942 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
943 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
944 | |
945 | fb_var_to_videomode(&mode1, var); | |
946 | fb_var_to_videomode(&mode2, &info->var); | |
947 | /* make sure we don't delete the videomode of current var */ | |
948 | ret = fb_mode_is_equal(&mode1, &mode2); | |
949 | ||
950 | if (!ret) { | |
951 | struct fb_event event; | |
952 | ||
953 | event.info = info; | |
954 | event.data = &mode1; | |
256154fb | 955 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
956 | } |
957 | ||
958 | if (!ret) | |
959 | fb_delete_videomode(&mode1, &info->modelist); | |
960 | ||
b1e7223f AD |
961 | |
962 | ret = (ret) ? -EINVAL : 0; | |
963 | goto done; | |
1da177e4 LT |
964 | } |
965 | ||
966 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
967 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
968 | u32 activate = var->activate; |
969 | ||
1da177e4 LT |
970 | if (!info->fbops->fb_check_var) { |
971 | *var = info->var; | |
b1e7223f | 972 | goto done; |
1da177e4 LT |
973 | } |
974 | ||
b1e7223f AD |
975 | ret = info->fbops->fb_check_var(var, info); |
976 | ||
977 | if (ret) | |
978 | goto done; | |
1da177e4 LT |
979 | |
980 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
0fcf6ada | 981 | struct fb_var_screeninfo old_var; |
1da177e4 | 982 | struct fb_videomode mode; |
1da177e4 | 983 | |
38a3dc51 | 984 | if (info->fbops->fb_get_caps) { |
b1e7223f | 985 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 986 | |
b1e7223f | 987 | if (ret) |
38a3dc51 AD |
988 | goto done; |
989 | } | |
990 | ||
0fcf6ada | 991 | old_var = info->var; |
1da177e4 | 992 | info->var = *var; |
38a3dc51 | 993 | |
0fcf6ada FTS |
994 | if (info->fbops->fb_set_par) { |
995 | ret = info->fbops->fb_set_par(info); | |
996 | ||
997 | if (ret) { | |
998 | info->var = old_var; | |
999 | printk(KERN_WARNING "detected " | |
1000 | "fb_set_par error, " | |
1001 | "error code: %d\n", ret); | |
1002 | goto done; | |
1003 | } | |
1004 | } | |
1da177e4 LT |
1005 | |
1006 | fb_pan_display(info, &info->var); | |
1da177e4 | 1007 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
1008 | fb_var_to_videomode(&mode, &info->var); |
1009 | ||
1010 | if (info->modelist.prev && info->modelist.next && | |
1011 | !list_empty(&info->modelist)) | |
b1e7223f | 1012 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 1013 | |
b1e7223f | 1014 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 1015 | struct fb_event event; |
4941cb7a | 1016 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
1017 | FB_EVENT_MODE_CHANGE_ALL : |
1018 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
1019 | |
1020 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1021 | event.info = info; | |
faa312da | 1022 | event.data = &mode; |
256154fb | 1023 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
1024 | } |
1025 | } | |
1026 | } | |
38a3dc51 AD |
1027 | |
1028 | done: | |
b1e7223f | 1029 | return ret; |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | int | |
1033 | fb_blank(struct fb_info *info, int blank) | |
1034 | { | |
1035 | int ret = -EINVAL; | |
1036 | ||
1037 | if (blank > FB_BLANK_POWERDOWN) | |
1038 | blank = FB_BLANK_POWERDOWN; | |
1039 | ||
1040 | if (info->fbops->fb_blank) | |
1041 | ret = info->fbops->fb_blank(blank, info); | |
1042 | ||
1043 | if (!ret) { | |
1044 | struct fb_event event; | |
1045 | ||
1046 | event.info = info; | |
1047 | event.data = ␣ | |
256154fb | 1048 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
1049 | } |
1050 | ||
1051 | return ret; | |
1052 | } | |
1053 | ||
a684e7d3 GU |
1054 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1055 | unsigned long arg) | |
1da177e4 | 1056 | { |
e5367711 | 1057 | struct fb_ops *fb; |
1da177e4 LT |
1058 | struct fb_var_screeninfo var; |
1059 | struct fb_fix_screeninfo fix; | |
1060 | struct fb_con2fbmap con2fb; | |
1f5e31d7 | 1061 | struct fb_cmap cmap_from; |
1da177e4 LT |
1062 | struct fb_cmap_user cmap; |
1063 | struct fb_event event; | |
1064 | void __user *argp = (void __user *)arg; | |
e5367711 AC |
1065 | long ret = 0; |
1066 | ||
1da177e4 LT |
1067 | switch (cmd) { |
1068 | case FBIOGET_VSCREENINFO: | |
1f5e31d7 AR |
1069 | if (!lock_fb_info(info)) |
1070 | return -ENODEV; | |
1071 | var = info->var; | |
1072 | unlock_fb_info(info); | |
1073 | ||
1074 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; | |
e5367711 | 1075 | break; |
1da177e4 | 1076 | case FBIOPUT_VSCREENINFO: |
1f5e31d7 AR |
1077 | if (copy_from_user(&var, argp, sizeof(var))) |
1078 | return -EFAULT; | |
1079 | if (!lock_fb_info(info)) | |
1080 | return -ENODEV; | |
ac751efa | 1081 | console_lock(); |
1da177e4 | 1082 | info->flags |= FBINFO_MISC_USEREVENT; |
e5367711 | 1083 | ret = fb_set_var(info, &var); |
1da177e4 | 1084 | info->flags &= ~FBINFO_MISC_USEREVENT; |
ac751efa | 1085 | console_unlock(); |
1f5e31d7 AR |
1086 | unlock_fb_info(info); |
1087 | if (!ret && copy_to_user(argp, &var, sizeof(var))) | |
e5367711 AC |
1088 | ret = -EFAULT; |
1089 | break; | |
1da177e4 | 1090 | case FBIOGET_FSCREENINFO: |
1f5e31d7 AR |
1091 | if (!lock_fb_info(info)) |
1092 | return -ENODEV; | |
1093 | fix = info->fix; | |
1094 | unlock_fb_info(info); | |
1095 | ||
1096 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; | |
e5367711 | 1097 | break; |
1da177e4 LT |
1098 | case FBIOPUTCMAP: |
1099 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1100 | return -EFAULT; |
1101 | ret = fb_set_user_cmap(&cmap, info); | |
e5367711 | 1102 | break; |
1da177e4 LT |
1103 | case FBIOGETCMAP: |
1104 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1105 | return -EFAULT; |
1106 | if (!lock_fb_info(info)) | |
1107 | return -ENODEV; | |
1108 | cmap_from = info->cmap; | |
1109 | unlock_fb_info(info); | |
1110 | ret = fb_cmap_to_user(&cmap_from, &cmap); | |
e5367711 | 1111 | break; |
1da177e4 | 1112 | case FBIOPAN_DISPLAY: |
1f5e31d7 AR |
1113 | if (copy_from_user(&var, argp, sizeof(var))) |
1114 | return -EFAULT; | |
1115 | if (!lock_fb_info(info)) | |
1116 | return -ENODEV; | |
ac751efa | 1117 | console_lock(); |
e5367711 | 1118 | ret = fb_pan_display(info, &var); |
ac751efa | 1119 | console_unlock(); |
1f5e31d7 | 1120 | unlock_fb_info(info); |
e5367711 | 1121 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1f5e31d7 | 1122 | return -EFAULT; |
e5367711 | 1123 | break; |
1da177e4 | 1124 | case FBIO_CURSOR: |
e5367711 AC |
1125 | ret = -EINVAL; |
1126 | break; | |
1da177e4 LT |
1127 | case FBIOGET_CON2FBMAP: |
1128 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1f5e31d7 AR |
1129 | return -EFAULT; |
1130 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1131 | return -EINVAL; | |
1132 | con2fb.framebuffer = -1; | |
1133 | event.data = &con2fb; | |
513adb58 AR |
1134 | if (!lock_fb_info(info)) |
1135 | return -ENODEV; | |
1f5e31d7 AR |
1136 | event.info = info; |
1137 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); | |
513adb58 | 1138 | unlock_fb_info(info); |
1f5e31d7 | 1139 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
e5367711 | 1140 | break; |
1da177e4 | 1141 | case FBIOPUT_CON2FBMAP: |
1f5e31d7 AR |
1142 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1143 | return -EFAULT; | |
1144 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1145 | return -EINVAL; | |
1146 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
1147 | return -EINVAL; | |
1da177e4 | 1148 | if (!registered_fb[con2fb.framebuffer]) |
e5367711 AC |
1149 | request_module("fb%d", con2fb.framebuffer); |
1150 | if (!registered_fb[con2fb.framebuffer]) { | |
1151 | ret = -EINVAL; | |
1152 | break; | |
1153 | } | |
1da177e4 | 1154 | event.data = &con2fb; |
513adb58 AR |
1155 | if (!lock_fb_info(info)) |
1156 | return -ENODEV; | |
1f5e31d7 | 1157 | event.info = info; |
66c1ca01 | 1158 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
513adb58 | 1159 | unlock_fb_info(info); |
e5367711 | 1160 | break; |
1da177e4 | 1161 | case FBIOBLANK: |
1f5e31d7 AR |
1162 | if (!lock_fb_info(info)) |
1163 | return -ENODEV; | |
ac751efa | 1164 | console_lock(); |
1da177e4 | 1165 | info->flags |= FBINFO_MISC_USEREVENT; |
e5367711 | 1166 | ret = fb_blank(info, arg); |
1da177e4 | 1167 | info->flags &= ~FBINFO_MISC_USEREVENT; |
ac751efa | 1168 | console_unlock(); |
1f5e31d7 AR |
1169 | unlock_fb_info(info); |
1170 | break; | |
1da177e4 | 1171 | default: |
1f5e31d7 AR |
1172 | if (!lock_fb_info(info)) |
1173 | return -ENODEV; | |
1174 | fb = info->fbops; | |
1175 | if (fb->fb_ioctl) | |
e5367711 | 1176 | ret = fb->fb_ioctl(info, cmd, arg); |
1f5e31d7 AR |
1177 | else |
1178 | ret = -ENOTTY; | |
1179 | unlock_fb_info(info); | |
1da177e4 | 1180 | } |
a684e7d3 GU |
1181 | return ret; |
1182 | } | |
1183 | ||
1184 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
a684e7d3 | 1185 | { |
c47747fd | 1186 | struct fb_info *info = file_fb_info(file); |
a684e7d3 | 1187 | |
c47747fd LT |
1188 | if (!info) |
1189 | return -ENODEV; | |
1f5e31d7 | 1190 | return do_fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1194 | struct fb_fix_screeninfo32 { |
1195 | char id[16]; | |
1196 | compat_caddr_t smem_start; | |
1197 | u32 smem_len; | |
1198 | u32 type; | |
1199 | u32 type_aux; | |
1200 | u32 visual; | |
1201 | u16 xpanstep; | |
1202 | u16 ypanstep; | |
1203 | u16 ywrapstep; | |
1204 | u32 line_length; | |
1205 | compat_caddr_t mmio_start; | |
1206 | u32 mmio_len; | |
1207 | u32 accel; | |
1208 | u16 reserved[3]; | |
1209 | }; | |
1210 | ||
1211 | struct fb_cmap32 { | |
1212 | u32 start; | |
1213 | u32 len; | |
1214 | compat_caddr_t red; | |
1215 | compat_caddr_t green; | |
1216 | compat_caddr_t blue; | |
1217 | compat_caddr_t transp; | |
1218 | }; | |
1219 | ||
a684e7d3 GU |
1220 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1221 | unsigned long arg) | |
c7f82d9c AB |
1222 | { |
1223 | struct fb_cmap_user __user *cmap; | |
1224 | struct fb_cmap32 __user *cmap32; | |
1225 | __u32 data; | |
1226 | int err; | |
1227 | ||
1228 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1229 | cmap32 = compat_ptr(arg); | |
1230 | ||
1231 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1232 | return -EFAULT; | |
1233 | ||
1234 | if (get_user(data, &cmap32->red) || | |
1235 | put_user(compat_ptr(data), &cmap->red) || | |
1236 | get_user(data, &cmap32->green) || | |
1237 | put_user(compat_ptr(data), &cmap->green) || | |
1238 | get_user(data, &cmap32->blue) || | |
1239 | put_user(compat_ptr(data), &cmap->blue) || | |
1240 | get_user(data, &cmap32->transp) || | |
1241 | put_user(compat_ptr(data), &cmap->transp)) | |
1242 | return -EFAULT; | |
1243 | ||
a684e7d3 | 1244 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
c7f82d9c AB |
1245 | |
1246 | if (!err) { | |
1247 | if (copy_in_user(&cmap32->start, | |
1248 | &cmap->start, | |
1249 | 2 * sizeof(__u32))) | |
1250 | err = -EFAULT; | |
1251 | } | |
1252 | return err; | |
1253 | } | |
1254 | ||
1255 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1256 | struct fb_fix_screeninfo32 __user *fix32) | |
1257 | { | |
1258 | __u32 data; | |
1259 | int err; | |
1260 | ||
1261 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1262 | ||
1263 | data = (__u32) (unsigned long) fix->smem_start; | |
1264 | err |= put_user(data, &fix32->smem_start); | |
1265 | ||
1266 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1267 | err |= put_user(fix->type, &fix32->type); | |
1268 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1269 | err |= put_user(fix->visual, &fix32->visual); | |
1270 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1271 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1272 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1273 | err |= put_user(fix->line_length, &fix32->line_length); | |
1274 | ||
1275 | data = (__u32) (unsigned long) fix->mmio_start; | |
1276 | err |= put_user(data, &fix32->mmio_start); | |
1277 | ||
1278 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1279 | err |= put_user(fix->accel, &fix32->accel); | |
1280 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1281 | sizeof(fix->reserved)); | |
1282 | ||
1283 | return err; | |
1284 | } | |
1285 | ||
a684e7d3 GU |
1286 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1287 | unsigned long arg) | |
c7f82d9c AB |
1288 | { |
1289 | mm_segment_t old_fs; | |
1290 | struct fb_fix_screeninfo fix; | |
1291 | struct fb_fix_screeninfo32 __user *fix32; | |
1292 | int err; | |
1293 | ||
1294 | fix32 = compat_ptr(arg); | |
1295 | ||
1296 | old_fs = get_fs(); | |
1297 | set_fs(KERNEL_DS); | |
a684e7d3 | 1298 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
c7f82d9c AB |
1299 | set_fs(old_fs); |
1300 | ||
1301 | if (!err) | |
1302 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1303 | ||
1304 | return err; | |
1305 | } | |
1306 | ||
a684e7d3 GU |
1307 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1308 | unsigned long arg) | |
1da177e4 | 1309 | { |
c47747fd LT |
1310 | struct fb_info *info = file_fb_info(file); |
1311 | struct fb_ops *fb; | |
c7f82d9c | 1312 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1313 | |
c47747fd LT |
1314 | if (!info) |
1315 | return -ENODEV; | |
1316 | fb = info->fbops; | |
c7f82d9c AB |
1317 | switch(cmd) { |
1318 | case FBIOGET_VSCREENINFO: | |
1319 | case FBIOPUT_VSCREENINFO: | |
1320 | case FBIOPAN_DISPLAY: | |
1321 | case FBIOGET_CON2FBMAP: | |
1322 | case FBIOPUT_CON2FBMAP: | |
1323 | arg = (unsigned long) compat_ptr(arg); | |
1324 | case FBIOBLANK: | |
a684e7d3 GU |
1325 | ret = do_fb_ioctl(info, cmd, arg); |
1326 | break; | |
c7f82d9c AB |
1327 | |
1328 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1329 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1330 | break; |
1331 | ||
1332 | case FBIOGETCMAP: | |
1333 | case FBIOPUTCMAP: | |
a684e7d3 | 1334 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1335 | break; |
1336 | ||
1337 | default: | |
1338 | if (fb->fb_compat_ioctl) | |
67a6680d | 1339 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1340 | break; |
1341 | } | |
1da177e4 LT |
1342 | return ret; |
1343 | } | |
1344 | #endif | |
1345 | ||
10eb2659 | 1346 | static int |
1da177e4 LT |
1347 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1348 | { | |
c47747fd LT |
1349 | struct fb_info *info = file_fb_info(file); |
1350 | struct fb_ops *fb; | |
1da177e4 | 1351 | unsigned long off; |
1da177e4 LT |
1352 | unsigned long start; |
1353 | u32 len; | |
1da177e4 | 1354 | |
c47747fd LT |
1355 | if (!info) |
1356 | return -ENODEV; | |
1da177e4 LT |
1357 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) |
1358 | return -EINVAL; | |
1359 | off = vma->vm_pgoff << PAGE_SHIFT; | |
c47747fd | 1360 | fb = info->fbops; |
1da177e4 LT |
1361 | if (!fb) |
1362 | return -ENODEV; | |
537a1bf0 | 1363 | mutex_lock(&info->mm_lock); |
1da177e4 LT |
1364 | if (fb->fb_mmap) { |
1365 | int res; | |
216d526c | 1366 | res = fb->fb_mmap(info, vma); |
537a1bf0 | 1367 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1368 | return res; |
1369 | } | |
1370 | ||
1da177e4 LT |
1371 | /* frame buffer memory */ |
1372 | start = info->fix.smem_start; | |
1373 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1374 | if (off >= len) { | |
1375 | /* memory mapped io */ | |
1376 | off -= len; | |
1377 | if (info->var.accel_flags) { | |
537a1bf0 | 1378 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1379 | return -EINVAL; |
1380 | } | |
1381 | start = info->fix.mmio_start; | |
1382 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1383 | } | |
537a1bf0 | 1384 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1385 | start &= PAGE_MASK; |
1386 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1387 | return -EINVAL; | |
1388 | off += start; | |
1389 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1390 | /* This is an IO map - tell maydump to skip this VMA */ | |
1391 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
c07fbfd1 | 1392 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
10eb2659 | 1393 | fb_pgprotect(file, vma, off); |
1da177e4 LT |
1394 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
1395 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1396 | return -EAGAIN; | |
1da177e4 | 1397 | return 0; |
1da177e4 LT |
1398 | } |
1399 | ||
1400 | static int | |
1401 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1402 | __acquires(&info->lock) |
1403 | __releases(&info->lock) | |
1da177e4 LT |
1404 | { |
1405 | int fbidx = iminor(inode); | |
1406 | struct fb_info *info; | |
1407 | int res = 0; | |
1408 | ||
698b3682 LT |
1409 | info = get_fb_info(fbidx); |
1410 | if (!info) { | |
a65e5d78 | 1411 | request_module("fb%d", fbidx); |
698b3682 LT |
1412 | info = get_fb_info(fbidx); |
1413 | if (!info) | |
1414 | return -ENODEV; | |
1415 | } | |
1416 | if (IS_ERR(info)) | |
1417 | return PTR_ERR(info); | |
1418 | ||
3e680aae | 1419 | mutex_lock(&info->lock); |
fc7f687a JC |
1420 | if (!try_module_get(info->fbops->owner)) { |
1421 | res = -ENODEV; | |
1422 | goto out; | |
1423 | } | |
cae8a12f | 1424 | file->private_data = info; |
1da177e4 LT |
1425 | if (info->fbops->fb_open) { |
1426 | res = info->fbops->fb_open(info,1); | |
1427 | if (res) | |
1428 | module_put(info->fbops->owner); | |
1429 | } | |
d847471d IC |
1430 | #ifdef CONFIG_FB_DEFERRED_IO |
1431 | if (info->fbdefio) | |
1432 | fb_deferred_io_open(info, inode, file); | |
1433 | #endif | |
fc7f687a | 1434 | out: |
3e680aae | 1435 | mutex_unlock(&info->lock); |
698b3682 LT |
1436 | if (res) |
1437 | put_fb_info(info); | |
1da177e4 LT |
1438 | return res; |
1439 | } | |
1440 | ||
1441 | static int | |
1442 | fb_release(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1443 | __acquires(&info->lock) |
1444 | __releases(&info->lock) | |
1da177e4 | 1445 | { |
cae8a12f | 1446 | struct fb_info * const info = file->private_data; |
1da177e4 | 1447 | |
3e680aae | 1448 | mutex_lock(&info->lock); |
1da177e4 LT |
1449 | if (info->fbops->fb_release) |
1450 | info->fbops->fb_release(info,1); | |
1451 | module_put(info->fbops->owner); | |
3e680aae | 1452 | mutex_unlock(&info->lock); |
698b3682 | 1453 | put_fb_info(info); |
1da177e4 LT |
1454 | return 0; |
1455 | } | |
1456 | ||
0128beee | 1457 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1458 | .owner = THIS_MODULE, |
1459 | .read = fb_read, | |
1460 | .write = fb_write, | |
e5367711 | 1461 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1462 | #ifdef CONFIG_COMPAT |
1463 | .compat_ioctl = fb_compat_ioctl, | |
1464 | #endif | |
1465 | .mmap = fb_mmap, | |
1466 | .open = fb_open, | |
1467 | .release = fb_release, | |
1468 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1469 | .get_unmapped_area = get_fb_unmapped_area, | |
1470 | #endif | |
5e841b88 PM |
1471 | #ifdef CONFIG_FB_DEFERRED_IO |
1472 | .fsync = fb_deferred_io_fsync, | |
1473 | #endif | |
6038f373 | 1474 | .llseek = default_llseek, |
1da177e4 LT |
1475 | }; |
1476 | ||
9a179176 AD |
1477 | struct class *fb_class; |
1478 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1479 | |
1480 | static int fb_check_foreignness(struct fb_info *fi) | |
1481 | { | |
1482 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1483 | ||
1484 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1485 | ||
1486 | #ifdef __BIG_ENDIAN | |
1487 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1488 | #else | |
1489 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1490 | #endif /* __BIG_ENDIAN */ | |
1491 | ||
1492 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1493 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1494 | "support this framebuffer\n", fi->fix.id); | |
1495 | return -ENOSYS; | |
1496 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1497 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1498 | "support this framebuffer\n", fi->fix.id); | |
1499 | return -ENOSYS; | |
1500 | } | |
1501 | ||
1502 | return 0; | |
1503 | } | |
1504 | ||
1471ca9a | 1505 | static bool apertures_overlap(struct aperture *gen, struct aperture *hw) |
4410f391 DA |
1506 | { |
1507 | /* is the generic aperture base the same as the HW one */ | |
1471ca9a | 1508 | if (gen->base == hw->base) |
4410f391 DA |
1509 | return true; |
1510 | /* is the generic aperture base inside the hw base->hw base+size */ | |
acd0acb6 | 1511 | if (gen->base > hw->base && gen->base < hw->base + hw->size) |
4410f391 DA |
1512 | return true; |
1513 | return false; | |
1514 | } | |
1471ca9a | 1515 | |
06415c56 MS |
1516 | static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
1517 | struct apertures_struct *hwa) | |
1471ca9a MS |
1518 | { |
1519 | int i, j; | |
1471ca9a MS |
1520 | if (!hwa || !gena) |
1521 | return false; | |
1522 | ||
1523 | for (i = 0; i < hwa->count; ++i) { | |
1524 | struct aperture *h = &hwa->ranges[i]; | |
1525 | for (j = 0; j < gena->count; ++j) { | |
1526 | struct aperture *g = &gena->ranges[j]; | |
1527 | printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", | |
f4b87dee RD |
1528 | (unsigned long long)g->base, |
1529 | (unsigned long long)g->size, | |
1530 | (unsigned long long)h->base, | |
1531 | (unsigned long long)h->size); | |
1471ca9a MS |
1532 | if (apertures_overlap(g, h)) |
1533 | return true; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | return false; | |
1538 | } | |
1539 | ||
712f3147 LT |
1540 | static int do_unregister_framebuffer(struct fb_info *fb_info); |
1541 | ||
3b9676e7 | 1542 | #define VGA_FB_PHYS 0xA0000 |
712f3147 | 1543 | static void do_remove_conflicting_framebuffers(struct apertures_struct *a, |
3b9676e7 | 1544 | const char *name, bool primary) |
06415c56 MS |
1545 | { |
1546 | int i; | |
1547 | ||
1548 | /* check all firmware fbs and kick off if the base addr overlaps */ | |
1549 | for (i = 0 ; i < FB_MAX; i++) { | |
3b9676e7 | 1550 | struct apertures_struct *gen_aper; |
06415c56 MS |
1551 | if (!registered_fb[i]) |
1552 | continue; | |
1553 | ||
1554 | if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) | |
1555 | continue; | |
1556 | ||
3b9676e7 MS |
1557 | gen_aper = registered_fb[i]->apertures; |
1558 | if (fb_do_apertures_overlap(gen_aper, a) || | |
1559 | (primary && gen_aper && gen_aper->count && | |
1560 | gen_aper->ranges[0].base == VGA_FB_PHYS)) { | |
1561 | ||
47c87d93 | 1562 | printk(KERN_INFO "fb: conflicting fb hw usage " |
06415c56 MS |
1563 | "%s vs %s - removing generic driver\n", |
1564 | name, registered_fb[i]->fix.id); | |
712f3147 | 1565 | do_unregister_framebuffer(registered_fb[i]); |
06415c56 MS |
1566 | } |
1567 | } | |
1568 | } | |
1da177e4 | 1569 | |
712f3147 | 1570 | static int do_register_framebuffer(struct fb_info *fb_info) |
1da177e4 LT |
1571 | { |
1572 | int i; | |
1573 | struct fb_event event; | |
96fe6a21 | 1574 | struct fb_videomode mode; |
1da177e4 | 1575 | |
e4c690e0 AV |
1576 | if (fb_check_foreignness(fb_info)) |
1577 | return -ENOSYS; | |
1578 | ||
712f3147 | 1579 | do_remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id, |
3b9676e7 | 1580 | fb_is_primary_device(fb_info)); |
4410f391 | 1581 | |
c590cece BP |
1582 | if (num_registered_fb == FB_MAX) |
1583 | return -ENXIO; | |
1584 | ||
1da177e4 LT |
1585 | num_registered_fb++; |
1586 | for (i = 0 ; i < FB_MAX; i++) | |
1587 | if (!registered_fb[i]) | |
1588 | break; | |
1589 | fb_info->node = i; | |
698b3682 | 1590 | atomic_set(&fb_info->count, 1); |
6c96895e LT |
1591 | mutex_init(&fb_info->lock); |
1592 | mutex_init(&fb_info->mm_lock); | |
1da177e4 | 1593 | |
77997aaa GKH |
1594 | fb_info->dev = device_create(fb_class, fb_info->device, |
1595 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1596 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1597 | /* Not fatal */ |
78cde088 GKH |
1598 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1599 | fb_info->dev = NULL; | |
1da177e4 | 1600 | } else |
78cde088 | 1601 | fb_init_device(fb_info); |
1da177e4 LT |
1602 | |
1603 | if (fb_info->pixmap.addr == NULL) { | |
1604 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1605 | if (fb_info->pixmap.addr) { | |
1606 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1607 | fb_info->pixmap.buf_align = 1; | |
1608 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1609 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1610 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1611 | } | |
1612 | } | |
1613 | fb_info->pixmap.offset = 0; | |
1614 | ||
bf26ad72 AD |
1615 | if (!fb_info->pixmap.blit_x) |
1616 | fb_info->pixmap.blit_x = ~(u32)0; | |
1617 | ||
1618 | if (!fb_info->pixmap.blit_y) | |
1619 | fb_info->pixmap.blit_y = ~(u32)0; | |
1620 | ||
96fe6a21 | 1621 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1622 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1623 | |
96fe6a21 AD |
1624 | fb_var_to_videomode(&mode, &fb_info->var); |
1625 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1626 | registered_fb[i] = fb_info; |
1627 | ||
1da177e4 | 1628 | event.info = fb_info; |
513adb58 AR |
1629 | if (!lock_fb_info(fb_info)) |
1630 | return -ENODEV; | |
256154fb | 1631 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
513adb58 | 1632 | unlock_fb_info(fb_info); |
1da177e4 LT |
1633 | return 0; |
1634 | } | |
1635 | ||
712f3147 | 1636 | static int do_unregister_framebuffer(struct fb_info *fb_info) |
1da177e4 | 1637 | { |
e614b18d | 1638 | struct fb_event event; |
cfafca80 | 1639 | int i, ret = 0; |
1da177e4 LT |
1640 | |
1641 | i = fb_info->node; | |
c590cece | 1642 | if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) |
712f3147 | 1643 | return -EINVAL; |
513adb58 AR |
1644 | |
1645 | if (!lock_fb_info(fb_info)) | |
1646 | return -ENODEV; | |
cfafca80 JB |
1647 | event.info = fb_info; |
1648 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
513adb58 | 1649 | unlock_fb_info(fb_info); |
cfafca80 | 1650 | |
712f3147 LT |
1651 | if (ret) |
1652 | return -EINVAL; | |
1da177e4 | 1653 | |
e614b18d AD |
1654 | if (fb_info->pixmap.addr && |
1655 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1656 | kfree(fb_info->pixmap.addr); |
1657 | fb_destroy_modelist(&fb_info->modelist); | |
698b3682 | 1658 | registered_fb[i] = NULL; |
1da177e4 | 1659 | num_registered_fb--; |
78cde088 GKH |
1660 | fb_cleanup_device(fb_info); |
1661 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1662 | event.info = fb_info; |
256154fb | 1663 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
4410f391 DA |
1664 | |
1665 | /* this may free fb info */ | |
698b3682 | 1666 | put_fb_info(fb_info); |
712f3147 LT |
1667 | return 0; |
1668 | } | |
1669 | ||
1670 | void remove_conflicting_framebuffers(struct apertures_struct *a, | |
1671 | const char *name, bool primary) | |
1672 | { | |
1673 | mutex_lock(®istration_lock); | |
1674 | do_remove_conflicting_framebuffers(a, name, primary); | |
698b3682 | 1675 | mutex_unlock(®istration_lock); |
712f3147 LT |
1676 | } |
1677 | EXPORT_SYMBOL(remove_conflicting_framebuffers); | |
1678 | ||
1679 | /** | |
1680 | * register_framebuffer - registers a frame buffer device | |
1681 | * @fb_info: frame buffer info structure | |
1682 | * | |
1683 | * Registers a frame buffer device @fb_info. | |
1684 | * | |
1685 | * Returns negative errno on error, or zero for success. | |
1686 | * | |
1687 | */ | |
1688 | int | |
1689 | register_framebuffer(struct fb_info *fb_info) | |
1690 | { | |
1691 | int ret; | |
1692 | ||
1693 | mutex_lock(®istration_lock); | |
1694 | ret = do_register_framebuffer(fb_info); | |
1695 | mutex_unlock(®istration_lock); | |
1696 | ||
1697 | return ret; | |
1698 | } | |
1699 | ||
1700 | /** | |
1701 | * unregister_framebuffer - releases a frame buffer device | |
1702 | * @fb_info: frame buffer info structure | |
1703 | * | |
1704 | * Unregisters a frame buffer device @fb_info. | |
1705 | * | |
1706 | * Returns negative errno on error, or zero for success. | |
1707 | * | |
1708 | * This function will also notify the framebuffer console | |
1709 | * to release the driver. | |
1710 | * | |
1711 | * This is meant to be called within a driver's module_exit() | |
1712 | * function. If this is called outside module_exit(), ensure | |
1713 | * that the driver implements fb_open() and fb_release() to | |
1714 | * check that no processes are using the device. | |
1715 | */ | |
1716 | int | |
1717 | unregister_framebuffer(struct fb_info *fb_info) | |
1718 | { | |
1719 | int ret; | |
1720 | ||
1721 | mutex_lock(®istration_lock); | |
1722 | ret = do_unregister_framebuffer(fb_info); | |
1723 | mutex_unlock(®istration_lock); | |
1724 | ||
cfafca80 | 1725 | return ret; |
1da177e4 LT |
1726 | } |
1727 | ||
1da177e4 LT |
1728 | /** |
1729 | * fb_set_suspend - low level driver signals suspend | |
1730 | * @info: framebuffer affected | |
1731 | * @state: 0 = resuming, !=0 = suspending | |
1732 | * | |
1733 | * This is meant to be used by low level drivers to | |
1734 | * signal suspend/resume to the core & clients. | |
1735 | * It must be called with the console semaphore held | |
1736 | */ | |
1737 | void fb_set_suspend(struct fb_info *info, int state) | |
1738 | { | |
1739 | struct fb_event event; | |
1740 | ||
1741 | event.info = info; | |
1742 | if (state) { | |
256154fb | 1743 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1744 | info->state = FBINFO_STATE_SUSPENDED; |
1745 | } else { | |
1746 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1747 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1748 | } |
1749 | } | |
1750 | ||
1751 | /** | |
1752 | * fbmem_init - init frame buffer subsystem | |
1753 | * | |
1754 | * Initialize the frame buffer subsystem. | |
1755 | * | |
1756 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1757 | * | |
1758 | */ | |
1759 | ||
1760 | static int __init | |
1761 | fbmem_init(void) | |
1762 | { | |
0aa16341 | 1763 | proc_create("fb", 0, NULL, &fb_proc_fops); |
1da177e4 | 1764 | |
1da177e4 LT |
1765 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1766 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1767 | ||
56b22935 | 1768 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1769 | if (IS_ERR(fb_class)) { |
1770 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1771 | fb_class = NULL; | |
1772 | } | |
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | #ifdef MODULE | |
1777 | module_init(fbmem_init); | |
1778 | static void __exit | |
1779 | fbmem_exit(void) | |
1780 | { | |
c43f89c2 | 1781 | remove_proc_entry("fb", NULL); |
56b22935 | 1782 | class_destroy(fb_class); |
5a340cce | 1783 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1784 | } |
1785 | ||
1786 | module_exit(fbmem_exit); | |
1787 | MODULE_LICENSE("GPL"); | |
1788 | MODULE_DESCRIPTION("Framebuffer base"); | |
1789 | #else | |
1790 | subsys_initcall(fbmem_init); | |
1791 | #endif | |
1792 | ||
1793 | int fb_new_modelist(struct fb_info *info) | |
1794 | { | |
1795 | struct fb_event event; | |
1796 | struct fb_var_screeninfo var = info->var; | |
1797 | struct list_head *pos, *n; | |
1798 | struct fb_modelist *modelist; | |
1799 | struct fb_videomode *m, mode; | |
1800 | int err = 1; | |
1801 | ||
1802 | list_for_each_safe(pos, n, &info->modelist) { | |
1803 | modelist = list_entry(pos, struct fb_modelist, list); | |
1804 | m = &modelist->mode; | |
1805 | fb_videomode_to_var(&var, m); | |
1806 | var.activate = FB_ACTIVATE_TEST; | |
1807 | err = fb_set_var(info, &var); | |
1808 | fb_var_to_videomode(&mode, &var); | |
1809 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1810 | list_del(pos); | |
1811 | kfree(pos); | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | err = 1; | |
1816 | ||
1817 | if (!list_empty(&info->modelist)) { | |
513adb58 AR |
1818 | if (!lock_fb_info(info)) |
1819 | return -ENODEV; | |
1da177e4 | 1820 | event.info = info; |
256154fb | 1821 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
513adb58 | 1822 | unlock_fb_info(info); |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | return err; | |
1826 | } | |
1827 | ||
0128beee HD |
1828 | static char *video_options[FB_MAX] __read_mostly; |
1829 | static int ofonly __read_mostly; | |
1da177e4 LT |
1830 | |
1831 | /** | |
1832 | * fb_get_options - get kernel boot parameters | |
1833 | * @name: framebuffer name as it would appear in | |
1834 | * the boot parameter line | |
1835 | * (video=<name>:<options>) | |
1836 | * @option: the option will be stored here | |
1837 | * | |
1838 | * NOTE: Needed to maintain backwards compatibility | |
1839 | */ | |
1840 | int fb_get_options(char *name, char **option) | |
1841 | { | |
1842 | char *opt, *options = NULL; | |
a67ef278 | 1843 | int retval = 0; |
1da177e4 LT |
1844 | int name_len = strlen(name), i; |
1845 | ||
1846 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1847 | retval = 1; | |
1848 | ||
1849 | if (name_len && !retval) { | |
1850 | for (i = 0; i < FB_MAX; i++) { | |
1851 | if (video_options[i] == NULL) | |
1852 | continue; | |
a67ef278 | 1853 | if (!video_options[i][0]) |
1da177e4 LT |
1854 | continue; |
1855 | opt = video_options[i]; | |
1856 | if (!strncmp(name, opt, name_len) && | |
1857 | opt[name_len] == ':') | |
1858 | options = opt + name_len + 1; | |
1859 | } | |
1860 | } | |
1861 | if (options && !strncmp(options, "off", 3)) | |
1862 | retval = 1; | |
1863 | ||
1864 | if (option) | |
1865 | *option = options; | |
1866 | ||
1867 | return retval; | |
1868 | } | |
1869 | ||
bc6d7fdf | 1870 | #ifndef MODULE |
1da177e4 LT |
1871 | /** |
1872 | * video_setup - process command line options | |
1873 | * @options: string of options | |
1874 | * | |
1875 | * Process command line options for frame buffer subsystem. | |
1876 | * | |
1877 | * NOTE: This function is a __setup and __init function. | |
1878 | * It only stores the options. Drivers have to call | |
1879 | * fb_get_options() as necessary. | |
1880 | * | |
1881 | * Returns zero. | |
1882 | * | |
1883 | */ | |
75c96f85 | 1884 | static int __init video_setup(char *options) |
1da177e4 LT |
1885 | { |
1886 | int i, global = 0; | |
1887 | ||
1888 | if (!options || !*options) | |
1889 | global = 1; | |
1890 | ||
1891 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1892 | ofonly = 1; | |
1893 | global = 1; | |
1894 | } | |
1895 | ||
f8033035 | 1896 | if (!global && !strchr(options, ':')) { |
9a054fba | 1897 | fb_mode_option = options; |
1da177e4 LT |
1898 | global = 1; |
1899 | } | |
1900 | ||
1901 | if (!global) { | |
1902 | for (i = 0; i < FB_MAX; i++) { | |
1903 | if (video_options[i] == NULL) { | |
1904 | video_options[i] = options; | |
1905 | break; | |
1906 | } | |
1907 | ||
1908 | } | |
1909 | } | |
1910 | ||
9b41046c | 1911 | return 1; |
1da177e4 LT |
1912 | } |
1913 | __setup("video=", video_setup); | |
bc6d7fdf | 1914 | #endif |
1da177e4 LT |
1915 | |
1916 | /* | |
1917 | * Visible symbols for modules | |
1918 | */ | |
1919 | ||
1920 | EXPORT_SYMBOL(register_framebuffer); | |
1921 | EXPORT_SYMBOL(unregister_framebuffer); | |
1922 | EXPORT_SYMBOL(num_registered_fb); | |
1923 | EXPORT_SYMBOL(registered_fb); | |
1da177e4 LT |
1924 | EXPORT_SYMBOL(fb_show_logo); |
1925 | EXPORT_SYMBOL(fb_set_var); | |
1926 | EXPORT_SYMBOL(fb_blank); | |
1927 | EXPORT_SYMBOL(fb_pan_display); | |
1928 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1929 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1930 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1931 | |
1932 | MODULE_LICENSE("GPL"); |