Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/fbmem.c | |
3 | * | |
4 | * Copyright (C) 1994 Martin Schaller | |
5 | * | |
6 | * 2001 - Documented with DocBook | |
7 | * - Brad Douglas <brad@neruo.com> | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General Public | |
10 | * License. See the file COPYING in the main directory of this archive | |
11 | * for more details. | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/smp_lock.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/mman.h> | |
a8f340e3 | 25 | #include <linux/vt.h> |
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/linux_logo.h> | |
28 | #include <linux/proc_fs.h> | |
29 | #include <linux/console.h> | |
30 | #ifdef CONFIG_KMOD | |
31 | #include <linux/kmod.h> | |
32 | #endif | |
1da177e4 | 33 | #include <linux/err.h> |
1da177e4 LT |
34 | #include <linux/device.h> |
35 | #include <linux/efi.h> | |
36 | ||
37 | #if defined(__mc68000__) || defined(CONFIG_APUS) | |
38 | #include <asm/setup.h> | |
39 | #endif | |
40 | ||
41 | #include <asm/io.h> | |
42 | #include <asm/uaccess.h> | |
43 | #include <asm/page.h> | |
44 | #include <asm/pgtable.h> | |
45 | ||
46 | #include <linux/fb.h> | |
47 | ||
48 | /* | |
49 | * Frame buffer device initialization and setup routines | |
50 | */ | |
51 | ||
52 | #define FBPIXMAPSIZE (1024 * 8) | |
53 | ||
0128beee HD |
54 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
55 | int num_registered_fb __read_mostly; | |
1da177e4 LT |
56 | |
57 | /* | |
58 | * Helpers | |
59 | */ | |
60 | ||
b8c90945 AD |
61 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
62 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 63 | { |
b8c90945 AD |
64 | int depth = 0; |
65 | ||
66 | if (fix->visual == FB_VISUAL_MONO01 || | |
67 | fix->visual == FB_VISUAL_MONO10) | |
68 | depth = 1; | |
69 | else { | |
70 | if (var->green.length == var->blue.length && | |
71 | var->green.length == var->red.length && | |
72 | var->green.offset == var->blue.offset && | |
73 | var->green.offset == var->red.offset) | |
74 | depth = var->green.length; | |
75 | else | |
76 | depth = var->green.length + var->red.length + | |
77 | var->blue.length; | |
78 | } | |
79 | ||
80 | return depth; | |
1da177e4 LT |
81 | } |
82 | EXPORT_SYMBOL(fb_get_color_depth); | |
83 | ||
84 | /* | |
f5a9951c | 85 | * Data padding functions. |
1da177e4 | 86 | */ |
f1ab5dac | 87 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 88 | { |
829e79b6 | 89 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 90 | } |
f1ab5dac | 91 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 92 | |
f1ab5dac JS |
93 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
94 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
95 | { |
96 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
97 | int i, j; | |
98 | ||
99 | for (i = height; i--; ) { | |
100 | for (j = 0; j < idx; j++) { | |
101 | tmp = dst[j]; | |
102 | tmp &= mask; | |
103 | tmp |= *src >> shift_low; | |
104 | dst[j] = tmp; | |
105 | tmp = *src << shift_high; | |
106 | dst[j+1] = tmp; | |
107 | src++; | |
108 | } | |
109 | tmp = dst[idx]; | |
110 | tmp &= mask; | |
111 | tmp |= *src >> shift_low; | |
112 | dst[idx] = tmp; | |
113 | if (shift_high < mod) { | |
114 | tmp = *src << shift_high; | |
115 | dst[idx+1] = tmp; | |
116 | } | |
117 | src++; | |
118 | dst += d_pitch; | |
119 | } | |
120 | } | |
f1ab5dac | 121 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
122 | |
123 | /* | |
124 | * we need to lock this section since fb_cursor | |
125 | * may use fb_imageblit() | |
126 | */ | |
127 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
128 | { | |
129 | u32 align = buf->buf_align - 1, offset; | |
130 | char *addr = buf->addr; | |
131 | ||
132 | /* If IO mapped, we need to sync before access, no sharing of | |
133 | * the pixmap is done | |
134 | */ | |
135 | if (buf->flags & FB_PIXMAP_IO) { | |
136 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
137 | info->fbops->fb_sync(info); | |
138 | return addr; | |
139 | } | |
140 | ||
141 | /* See if we fit in the remaining pixmap space */ | |
142 | offset = buf->offset + align; | |
143 | offset &= ~align; | |
144 | if (offset + size > buf->size) { | |
145 | /* We do not fit. In order to be able to re-use the buffer, | |
146 | * we must ensure no asynchronous DMA'ing or whatever operation | |
147 | * is in progress, we sync for that. | |
148 | */ | |
149 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
150 | info->fbops->fb_sync(info); | |
151 | offset = 0; | |
152 | } | |
153 | buf->offset = offset + size; | |
154 | addr += offset; | |
155 | ||
156 | return addr; | |
157 | } | |
158 | ||
159 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
160 | |
161 | static inline unsigned safe_shift(unsigned d, int n) | |
162 | { | |
163 | return n < 0 ? d >> -n : d << n; | |
164 | } | |
165 | ||
166 | static void fb_set_logocmap(struct fb_info *info, | |
167 | const struct linux_logo *logo) | |
168 | { | |
169 | struct fb_cmap palette_cmap; | |
170 | u16 palette_green[16]; | |
171 | u16 palette_blue[16]; | |
172 | u16 palette_red[16]; | |
173 | int i, j, n; | |
174 | const unsigned char *clut = logo->clut; | |
175 | ||
176 | palette_cmap.start = 0; | |
177 | palette_cmap.len = 16; | |
178 | palette_cmap.red = palette_red; | |
179 | palette_cmap.green = palette_green; | |
180 | palette_cmap.blue = palette_blue; | |
181 | palette_cmap.transp = NULL; | |
182 | ||
183 | for (i = 0; i < logo->clutsize; i += n) { | |
184 | n = logo->clutsize - i; | |
185 | /* palette_cmap provides space for only 16 colors at once */ | |
186 | if (n > 16) | |
187 | n = 16; | |
188 | palette_cmap.start = 32 + i; | |
189 | palette_cmap.len = n; | |
190 | for (j = 0; j < n; ++j) { | |
191 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
192 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
193 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
194 | clut += 3; | |
195 | } | |
196 | fb_set_cmap(&palette_cmap, info); | |
197 | } | |
198 | } | |
199 | ||
200 | static void fb_set_logo_truepalette(struct fb_info *info, | |
201 | const struct linux_logo *logo, | |
202 | u32 *palette) | |
203 | { | |
0128beee | 204 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
205 | unsigned char redmask, greenmask, bluemask; |
206 | int redshift, greenshift, blueshift; | |
207 | int i; | |
208 | const unsigned char *clut = logo->clut; | |
209 | ||
210 | /* | |
211 | * We have to create a temporary palette since console palette is only | |
212 | * 16 colors long. | |
213 | */ | |
214 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
215 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
216 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
217 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
218 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
219 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
220 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
221 | ||
222 | for ( i = 0; i < logo->clutsize; i++) { | |
223 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
224 | safe_shift((clut[1] & greenmask), greenshift) | | |
225 | safe_shift((clut[2] & bluemask), blueshift)); | |
226 | clut += 3; | |
227 | } | |
228 | } | |
229 | ||
230 | static void fb_set_logo_directpalette(struct fb_info *info, | |
231 | const struct linux_logo *logo, | |
232 | u32 *palette) | |
233 | { | |
234 | int redshift, greenshift, blueshift; | |
235 | int i; | |
236 | ||
237 | redshift = info->var.red.offset; | |
238 | greenshift = info->var.green.offset; | |
239 | blueshift = info->var.blue.offset; | |
240 | ||
241 | for (i = 32; i < logo->clutsize; i++) | |
242 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
243 | } | |
244 | ||
245 | static void fb_set_logo(struct fb_info *info, | |
246 | const struct linux_logo *logo, u8 *dst, | |
247 | int depth) | |
248 | { | |
b8c90945 | 249 | int i, j, k; |
1da177e4 | 250 | const u8 *src = logo->data; |
b8c90945 AD |
251 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
252 | u8 fg = 1, d; | |
1da177e4 | 253 | |
b8c90945 | 254 | if (fb_get_color_depth(&info->var, &info->fix) == 3) |
1da177e4 LT |
255 | fg = 7; |
256 | ||
b8c90945 AD |
257 | if (info->fix.visual == FB_VISUAL_MONO01 || |
258 | info->fix.visual == FB_VISUAL_MONO10) | |
259 | fg = ~((u8) (0xfff << info->var.green.length)); | |
260 | ||
1da177e4 LT |
261 | switch (depth) { |
262 | case 4: | |
263 | for (i = 0; i < logo->height; i++) | |
264 | for (j = 0; j < logo->width; src++) { | |
265 | *dst++ = *src >> 4; | |
266 | j++; | |
267 | if (j < logo->width) { | |
268 | *dst++ = *src & 0x0f; | |
269 | j++; | |
270 | } | |
271 | } | |
272 | break; | |
273 | case 1: | |
274 | for (i = 0; i < logo->height; i++) { | |
275 | for (j = 0; j < logo->width; src++) { | |
276 | d = *src ^ xor; | |
277 | for (k = 7; k >= 0; k--) { | |
278 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
279 | j++; | |
280 | } | |
281 | } | |
282 | } | |
283 | break; | |
284 | } | |
285 | } | |
286 | ||
287 | /* | |
288 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
289 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
290 | * the visual format and color depth of the framebuffer, the DAC, the | |
291 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
292 | * | |
293 | * Case 1 - linux_logo_clut224: | |
294 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
295 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
296 | * | |
297 | * For visuals that require color info from the pseudo_palette, we also construct | |
298 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
299 | * will be set. | |
300 | * | |
301 | * Case 2 - linux_logo_vga16: | |
302 | * The number of colors just matches the console colors, thus there is no need | |
303 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
304 | * each byte contains color information for two pixels (upper and lower nibble). | |
305 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
306 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
307 | * | |
308 | * Case 3 - linux_logo_mono: | |
309 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
310 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
311 | * be set to 1. | |
312 | */ | |
313 | static struct logo_data { | |
314 | int depth; | |
315 | int needs_directpalette; | |
316 | int needs_truepalette; | |
317 | int needs_cmapreset; | |
318 | const struct linux_logo *logo; | |
0128beee | 319 | } fb_logo __read_mostly; |
1da177e4 | 320 | |
9c44e5f6 AD |
321 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
322 | { | |
323 | u32 size = width * height, i; | |
324 | ||
325 | out += size - 1; | |
326 | ||
327 | for (i = size; i--; ) | |
328 | *out-- = *in++; | |
329 | } | |
330 | ||
331 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
332 | { | |
f837e6f7 | 333 | int i, j, h = height - 1; |
9c44e5f6 AD |
334 | |
335 | for (i = 0; i < height; i++) | |
336 | for (j = 0; j < width; j++) | |
f837e6f7 | 337 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
338 | } |
339 | ||
340 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
341 | { | |
342 | int i, j, w = width - 1; | |
343 | ||
344 | for (i = 0; i < height; i++) | |
345 | for (j = 0; j < width; j++) | |
346 | out[height * (w - j) + i] = *in++; | |
347 | } | |
348 | ||
349 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
350 | struct fb_image *image, int rotate) | |
351 | { | |
352 | u32 tmp; | |
353 | ||
354 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
355 | fb_rotate_logo_ud(image->data, dst, image->width, |
356 | image->height); | |
f837e6f7 AD |
357 | image->dx = info->var.xres - image->width; |
358 | image->dy = info->var.yres - image->height; | |
9c44e5f6 | 359 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
360 | fb_rotate_logo_cw(image->data, dst, image->width, |
361 | image->height); | |
9c44e5f6 AD |
362 | tmp = image->width; |
363 | image->width = image->height; | |
364 | image->height = tmp; | |
f837e6f7 AD |
365 | image->dx = info->var.xres - image->width; |
366 | } else if (rotate == FB_ROTATE_CCW) { | |
9c44e5f6 AD |
367 | fb_rotate_logo_ccw(image->data, dst, image->width, |
368 | image->height); | |
f837e6f7 AD |
369 | tmp = image->width; |
370 | image->width = image->height; | |
371 | image->height = tmp; | |
372 | image->dy = info->var.yres - image->height; | |
9c44e5f6 AD |
373 | } |
374 | ||
375 | image->data = dst; | |
376 | } | |
377 | ||
378 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
379 | int rotate) | |
380 | { | |
381 | int x; | |
382 | ||
383 | if (rotate == FB_ROTATE_UR) { | |
384 | for (x = 0; x < num_online_cpus() && | |
385 | x * (fb_logo.logo->width + 8) <= | |
386 | info->var.xres - fb_logo.logo->width; x++) { | |
387 | info->fbops->fb_imageblit(info, image); | |
388 | image->dx += fb_logo.logo->width + 8; | |
389 | } | |
390 | } else if (rotate == FB_ROTATE_UD) { | |
391 | for (x = 0; x < num_online_cpus() && | |
392 | x * (fb_logo.logo->width + 8) <= | |
393 | info->var.xres - fb_logo.logo->width; x++) { | |
394 | info->fbops->fb_imageblit(info, image); | |
395 | image->dx -= fb_logo.logo->width + 8; | |
396 | } | |
397 | } else if (rotate == FB_ROTATE_CW) { | |
398 | for (x = 0; x < num_online_cpus() && | |
399 | x * (fb_logo.logo->width + 8) <= | |
400 | info->var.yres - fb_logo.logo->width; x++) { | |
401 | info->fbops->fb_imageblit(info, image); | |
402 | image->dy += fb_logo.logo->width + 8; | |
403 | } | |
404 | } else if (rotate == FB_ROTATE_CCW) { | |
405 | for (x = 0; x < num_online_cpus() && | |
406 | x * (fb_logo.logo->width + 8) <= | |
407 | info->var.yres - fb_logo.logo->width; x++) { | |
408 | info->fbops->fb_imageblit(info, image); | |
409 | image->dy -= fb_logo.logo->width + 8; | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
1da177e4 | 415 | { |
b8c90945 | 416 | int depth = fb_get_color_depth(&info->var, &info->fix); |
9c44e5f6 | 417 | int yres; |
1da177e4 LT |
418 | |
419 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
420 | ||
421 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
422 | return 0; | |
423 | ||
424 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
425 | depth = info->var.blue.length; | |
426 | if (info->var.red.length < depth) | |
427 | depth = info->var.red.length; | |
428 | if (info->var.green.length < depth) | |
429 | depth = info->var.green.length; | |
430 | } | |
431 | ||
0c683dbf | 432 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
397eeab3 AD |
433 | /* assume console colormap */ |
434 | depth = 4; | |
435 | } | |
436 | ||
1da177e4 LT |
437 | if (depth >= 8) { |
438 | switch (info->fix.visual) { | |
439 | case FB_VISUAL_TRUECOLOR: | |
440 | fb_logo.needs_truepalette = 1; | |
441 | break; | |
442 | case FB_VISUAL_DIRECTCOLOR: | |
443 | fb_logo.needs_directpalette = 1; | |
444 | fb_logo.needs_cmapreset = 1; | |
445 | break; | |
446 | case FB_VISUAL_PSEUDOCOLOR: | |
447 | fb_logo.needs_cmapreset = 1; | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
452 | /* Return if no suitable logo was found */ | |
453 | fb_logo.logo = fb_find_logo(depth); | |
6d9885a8 JS |
454 | |
455 | if (!fb_logo.logo) { | |
456 | return 0; | |
457 | } | |
1da177e4 | 458 | |
9c44e5f6 AD |
459 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
460 | yres = info->var.yres; | |
461 | else | |
462 | yres = info->var.xres; | |
463 | ||
6d9885a8 | 464 | if (fb_logo.logo->height > yres) { |
1da177e4 LT |
465 | fb_logo.logo = NULL; |
466 | return 0; | |
467 | } | |
9c44e5f6 | 468 | |
1da177e4 LT |
469 | /* What depth we asked for might be different from what we get */ |
470 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
471 | fb_logo.depth = 8; | |
472 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
473 | fb_logo.depth = 4; | |
474 | else | |
475 | fb_logo.depth = 1; | |
476 | return fb_logo.logo->height; | |
477 | } | |
478 | ||
9c44e5f6 | 479 | int fb_show_logo(struct fb_info *info, int rotate) |
1da177e4 LT |
480 | { |
481 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 482 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 483 | struct fb_image image; |
1da177e4 LT |
484 | |
485 | /* Return if the frame buffer is not mapped or suspended */ | |
486 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
487 | return 0; | |
488 | ||
489 | image.depth = 8; | |
490 | image.data = fb_logo.logo->data; | |
491 | ||
492 | if (fb_logo.needs_cmapreset) | |
493 | fb_set_logocmap(info, fb_logo.logo); | |
494 | ||
495 | if (fb_logo.needs_truepalette || | |
496 | fb_logo.needs_directpalette) { | |
497 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
498 | if (palette == NULL) | |
499 | return 0; | |
500 | ||
501 | if (fb_logo.needs_truepalette) | |
502 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
503 | else | |
504 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
505 | ||
506 | saved_pseudo_palette = info->pseudo_palette; | |
507 | info->pseudo_palette = palette; | |
508 | } | |
509 | ||
510 | if (fb_logo.depth <= 4) { | |
511 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
512 | GFP_KERNEL); | |
513 | if (logo_new == NULL) { | |
514 | kfree(palette); | |
515 | if (saved_pseudo_palette) | |
516 | info->pseudo_palette = saved_pseudo_palette; | |
517 | return 0; | |
518 | } | |
519 | image.data = logo_new; | |
520 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
521 | } | |
522 | ||
9c44e5f6 AD |
523 | image.dx = 0; |
524 | image.dy = 0; | |
1da177e4 LT |
525 | image.width = fb_logo.logo->width; |
526 | image.height = fb_logo.logo->height; | |
1da177e4 | 527 | |
9c44e5f6 AD |
528 | if (rotate) { |
529 | logo_rotate = kmalloc(fb_logo.logo->width * | |
530 | fb_logo.logo->height, GFP_KERNEL); | |
531 | if (logo_rotate) | |
532 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 533 | } |
9c44e5f6 AD |
534 | |
535 | fb_do_show_logo(info, &image, rotate); | |
536 | ||
1da177e4 LT |
537 | kfree(palette); |
538 | if (saved_pseudo_palette != NULL) | |
539 | info->pseudo_palette = saved_pseudo_palette; | |
540 | kfree(logo_new); | |
9c44e5f6 | 541 | kfree(logo_rotate); |
1da177e4 LT |
542 | return fb_logo.logo->height; |
543 | } | |
544 | #else | |
9c44e5f6 AD |
545 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
546 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
547 | #endif /* CONFIG_LOGO */ |
548 | ||
549 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
550 | int len, int *eof, void *private) | |
551 | { | |
552 | struct fb_info **fi; | |
553 | int clen; | |
554 | ||
555 | clen = 0; | |
a09fd48f GU |
556 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && clen < 4000; |
557 | fi++) | |
1da177e4 LT |
558 | if (*fi) |
559 | clen += sprintf(buf + clen, "%d %s\n", | |
560 | (*fi)->node, | |
561 | (*fi)->fix.id); | |
562 | *start = buf + offset; | |
563 | if (clen > offset) | |
564 | clen -= offset; | |
565 | else | |
566 | clen = 0; | |
567 | return clen < len ? clen : len; | |
568 | } | |
569 | ||
570 | static ssize_t | |
571 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
572 | { | |
573 | unsigned long p = *ppos; | |
ad9a824e | 574 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
575 | int fbidx = iminor(inode); |
576 | struct fb_info *info = registered_fb[fbidx]; | |
577 | u32 *buffer, *dst; | |
578 | u32 __iomem *src; | |
579 | int c, i, cnt = 0, err = 0; | |
580 | unsigned long total_size; | |
581 | ||
582 | if (!info || ! info->screen_base) | |
583 | return -ENODEV; | |
584 | ||
585 | if (info->state != FBINFO_STATE_RUNNING) | |
586 | return -EPERM; | |
587 | ||
588 | if (info->fbops->fb_read) | |
589 | return info->fbops->fb_read(file, buf, count, ppos); | |
590 | ||
591 | total_size = info->screen_size; | |
0a484a3a | 592 | |
1da177e4 LT |
593 | if (total_size == 0) |
594 | total_size = info->fix.smem_len; | |
595 | ||
596 | if (p >= total_size) | |
0a484a3a AD |
597 | return 0; |
598 | ||
1da177e4 | 599 | if (count >= total_size) |
0a484a3a AD |
600 | count = total_size; |
601 | ||
1da177e4 LT |
602 | if (count + p > total_size) |
603 | count = total_size - p; | |
604 | ||
1da177e4 LT |
605 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
606 | GFP_KERNEL); | |
607 | if (!buffer) | |
608 | return -ENOMEM; | |
609 | ||
610 | src = (u32 __iomem *) (info->screen_base + p); | |
611 | ||
612 | if (info->fbops->fb_sync) | |
613 | info->fbops->fb_sync(info); | |
614 | ||
615 | while (count) { | |
616 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
617 | dst = buffer; | |
618 | for (i = c >> 2; i--; ) | |
619 | *dst++ = fb_readl(src++); | |
620 | if (c & 3) { | |
621 | u8 *dst8 = (u8 *) dst; | |
622 | u8 __iomem *src8 = (u8 __iomem *) src; | |
623 | ||
624 | for (i = c & 3; i--;) | |
625 | *dst8++ = fb_readb(src8++); | |
626 | ||
627 | src = (u32 __iomem *) src8; | |
628 | } | |
629 | ||
630 | if (copy_to_user(buf, buffer, c)) { | |
631 | err = -EFAULT; | |
632 | break; | |
633 | } | |
634 | *ppos += c; | |
635 | buf += c; | |
636 | cnt += c; | |
637 | count -= c; | |
638 | } | |
639 | ||
640 | kfree(buffer); | |
0a484a3a | 641 | |
1da177e4 LT |
642 | return (err) ? err : cnt; |
643 | } | |
644 | ||
645 | static ssize_t | |
646 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
647 | { | |
648 | unsigned long p = *ppos; | |
ad9a824e | 649 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
650 | int fbidx = iminor(inode); |
651 | struct fb_info *info = registered_fb[fbidx]; | |
652 | u32 *buffer, *src; | |
653 | u32 __iomem *dst; | |
0a484a3a | 654 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
655 | unsigned long total_size; |
656 | ||
657 | if (!info || !info->screen_base) | |
658 | return -ENODEV; | |
659 | ||
660 | if (info->state != FBINFO_STATE_RUNNING) | |
661 | return -EPERM; | |
662 | ||
663 | if (info->fbops->fb_write) | |
664 | return info->fbops->fb_write(file, buf, count, ppos); | |
665 | ||
666 | total_size = info->screen_size; | |
0a484a3a | 667 | |
1da177e4 LT |
668 | if (total_size == 0) |
669 | total_size = info->fix.smem_len; | |
670 | ||
671 | if (p > total_size) | |
6a2a8866 | 672 | return -EFBIG; |
0a484a3a | 673 | |
6a2a8866 AD |
674 | if (count > total_size) { |
675 | err = -EFBIG; | |
0a484a3a | 676 | count = total_size; |
6a2a8866 AD |
677 | } |
678 | ||
679 | if (count + p > total_size) { | |
680 | if (!err) | |
681 | err = -ENOSPC; | |
0a484a3a | 682 | |
0a484a3a | 683 | count = total_size - p; |
6a2a8866 | 684 | } |
0a484a3a | 685 | |
1da177e4 LT |
686 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
687 | GFP_KERNEL); | |
688 | if (!buffer) | |
689 | return -ENOMEM; | |
690 | ||
691 | dst = (u32 __iomem *) (info->screen_base + p); | |
692 | ||
693 | if (info->fbops->fb_sync) | |
694 | info->fbops->fb_sync(info); | |
695 | ||
696 | while (count) { | |
697 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
698 | src = buffer; | |
0a484a3a | 699 | |
1da177e4 LT |
700 | if (copy_from_user(src, buf, c)) { |
701 | err = -EFAULT; | |
702 | break; | |
703 | } | |
0a484a3a | 704 | |
1da177e4 LT |
705 | for (i = c >> 2; i--; ) |
706 | fb_writel(*src++, dst++); | |
0a484a3a | 707 | |
1da177e4 LT |
708 | if (c & 3) { |
709 | u8 *src8 = (u8 *) src; | |
710 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
711 | ||
712 | for (i = c & 3; i--; ) | |
713 | fb_writeb(*src8++, dst8++); | |
714 | ||
715 | dst = (u32 __iomem *) dst8; | |
716 | } | |
0a484a3a | 717 | |
1da177e4 LT |
718 | *ppos += c; |
719 | buf += c; | |
720 | cnt += c; | |
721 | count -= c; | |
722 | } | |
0a484a3a | 723 | |
1da177e4 LT |
724 | kfree(buffer); |
725 | ||
6a2a8866 | 726 | return (cnt) ? cnt : err; |
1da177e4 LT |
727 | } |
728 | ||
729 | #ifdef CONFIG_KMOD | |
730 | static void try_to_load(int fb) | |
731 | { | |
732 | request_module("fb%d", fb); | |
733 | } | |
734 | #endif /* CONFIG_KMOD */ | |
735 | ||
736 | int | |
737 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
738 | { | |
1207069f | 739 | struct fb_fix_screeninfo *fix = &info->fix; |
1da177e4 LT |
740 | int xoffset = var->xoffset; |
741 | int yoffset = var->yoffset; | |
1207069f AD |
742 | int err = 0, yres = info->var.yres; |
743 | ||
744 | if (var->yoffset > 0) { | |
745 | if (var->vmode & FB_VMODE_YWRAP) { | |
746 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
747 | err = -EINVAL; | |
748 | else | |
749 | yres = 0; | |
750 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
751 | err = -EINVAL; | |
752 | } | |
753 | ||
754 | if (var->xoffset > 0 && (!fix->xpanstep || | |
755 | (var->xoffset % fix->xpanstep))) | |
756 | err = -EINVAL; | |
757 | ||
758 | if (err || !info->fbops->fb_pan_display || xoffset < 0 || | |
759 | yoffset < 0 || var->yoffset + yres > info->var.yres_virtual || | |
760 | var->xoffset + info->var.xres > info->var.xres_virtual) | |
761 | return -EINVAL; | |
1da177e4 | 762 | |
1da177e4 LT |
763 | if ((err = info->fbops->fb_pan_display(var, info))) |
764 | return err; | |
765 | info->var.xoffset = var->xoffset; | |
766 | info->var.yoffset = var->yoffset; | |
767 | if (var->vmode & FB_VMODE_YWRAP) | |
768 | info->var.vmode |= FB_VMODE_YWRAP; | |
769 | else | |
770 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
771 | return 0; | |
772 | } | |
773 | ||
774 | int | |
775 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
776 | { | |
3edea483 | 777 | int err, flags = info->flags; |
1da177e4 LT |
778 | |
779 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
780 | struct fb_videomode mode1, mode2; | |
781 | int ret = 0; | |
782 | ||
783 | fb_var_to_videomode(&mode1, var); | |
784 | fb_var_to_videomode(&mode2, &info->var); | |
785 | /* make sure we don't delete the videomode of current var */ | |
786 | ret = fb_mode_is_equal(&mode1, &mode2); | |
787 | ||
788 | if (!ret) { | |
789 | struct fb_event event; | |
790 | ||
791 | event.info = info; | |
792 | event.data = &mode1; | |
256154fb | 793 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
794 | } |
795 | ||
796 | if (!ret) | |
797 | fb_delete_videomode(&mode1, &info->modelist); | |
798 | ||
799 | return ret; | |
800 | } | |
801 | ||
802 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
803 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
804 | if (!info->fbops->fb_check_var) { | |
805 | *var = info->var; | |
806 | return 0; | |
807 | } | |
808 | ||
809 | if ((err = info->fbops->fb_check_var(var, info))) | |
810 | return err; | |
811 | ||
812 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
813 | struct fb_videomode mode; | |
814 | int err = 0; | |
815 | ||
816 | info->var = *var; | |
817 | if (info->fbops->fb_set_par) | |
818 | info->fbops->fb_set_par(info); | |
819 | ||
820 | fb_pan_display(info, &info->var); | |
821 | ||
822 | fb_set_cmap(&info->cmap, info); | |
823 | ||
824 | fb_var_to_videomode(&mode, &info->var); | |
825 | ||
826 | if (info->modelist.prev && info->modelist.next && | |
827 | !list_empty(&info->modelist)) | |
828 | err = fb_add_videomode(&mode, &info->modelist); | |
829 | ||
3edea483 | 830 | if (!err && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 831 | struct fb_event event; |
7726e9e1 AD |
832 | int evnt = (var->activate & FB_ACTIVATE_ALL) ? |
833 | FB_EVENT_MODE_CHANGE_ALL : | |
834 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
835 | |
836 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
837 | event.info = info; | |
256154fb | 838 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
839 | } |
840 | } | |
841 | } | |
842 | return 0; | |
843 | } | |
844 | ||
845 | int | |
846 | fb_blank(struct fb_info *info, int blank) | |
847 | { | |
848 | int ret = -EINVAL; | |
849 | ||
850 | if (blank > FB_BLANK_POWERDOWN) | |
851 | blank = FB_BLANK_POWERDOWN; | |
852 | ||
853 | if (info->fbops->fb_blank) | |
854 | ret = info->fbops->fb_blank(blank, info); | |
855 | ||
856 | if (!ret) { | |
857 | struct fb_event event; | |
858 | ||
859 | event.info = info; | |
860 | event.data = ␣ | |
256154fb | 861 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
862 | } |
863 | ||
864 | return ret; | |
865 | } | |
866 | ||
867 | static int | |
868 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
869 | unsigned long arg) | |
870 | { | |
871 | int fbidx = iminor(inode); | |
872 | struct fb_info *info = registered_fb[fbidx]; | |
873 | struct fb_ops *fb = info->fbops; | |
874 | struct fb_var_screeninfo var; | |
875 | struct fb_fix_screeninfo fix; | |
876 | struct fb_con2fbmap con2fb; | |
877 | struct fb_cmap_user cmap; | |
878 | struct fb_event event; | |
879 | void __user *argp = (void __user *)arg; | |
880 | int i; | |
881 | ||
882 | if (!fb) | |
883 | return -ENODEV; | |
884 | switch (cmd) { | |
885 | case FBIOGET_VSCREENINFO: | |
886 | return copy_to_user(argp, &info->var, | |
887 | sizeof(var)) ? -EFAULT : 0; | |
888 | case FBIOPUT_VSCREENINFO: | |
889 | if (copy_from_user(&var, argp, sizeof(var))) | |
890 | return -EFAULT; | |
891 | acquire_console_sem(); | |
892 | info->flags |= FBINFO_MISC_USEREVENT; | |
893 | i = fb_set_var(info, &var); | |
894 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
895 | release_console_sem(); | |
896 | if (i) return i; | |
897 | if (copy_to_user(argp, &var, sizeof(var))) | |
898 | return -EFAULT; | |
899 | return 0; | |
900 | case FBIOGET_FSCREENINFO: | |
901 | return copy_to_user(argp, &info->fix, | |
902 | sizeof(fix)) ? -EFAULT : 0; | |
903 | case FBIOPUTCMAP: | |
904 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
905 | return -EFAULT; | |
906 | return (fb_set_user_cmap(&cmap, info)); | |
907 | case FBIOGETCMAP: | |
908 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
909 | return -EFAULT; | |
910 | return fb_cmap_to_user(&info->cmap, &cmap); | |
911 | case FBIOPAN_DISPLAY: | |
912 | if (copy_from_user(&var, argp, sizeof(var))) | |
913 | return -EFAULT; | |
914 | acquire_console_sem(); | |
915 | i = fb_pan_display(info, &var); | |
916 | release_console_sem(); | |
917 | if (i) | |
918 | return i; | |
919 | if (copy_to_user(argp, &var, sizeof(var))) | |
920 | return -EFAULT; | |
921 | return 0; | |
922 | case FBIO_CURSOR: | |
923 | return -EINVAL; | |
924 | case FBIOGET_CON2FBMAP: | |
925 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
926 | return -EFAULT; | |
927 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
928 | return -EINVAL; | |
929 | con2fb.framebuffer = -1; | |
930 | event.info = info; | |
931 | event.data = &con2fb; | |
256154fb | 932 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1da177e4 LT |
933 | return copy_to_user(argp, &con2fb, |
934 | sizeof(con2fb)) ? -EFAULT : 0; | |
935 | case FBIOPUT_CON2FBMAP: | |
936 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
937 | return - EFAULT; | |
938 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
939 | return -EINVAL; | |
940 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
941 | return -EINVAL; | |
942 | #ifdef CONFIG_KMOD | |
943 | if (!registered_fb[con2fb.framebuffer]) | |
944 | try_to_load(con2fb.framebuffer); | |
945 | #endif /* CONFIG_KMOD */ | |
946 | if (!registered_fb[con2fb.framebuffer]) | |
947 | return -EINVAL; | |
948 | event.info = info; | |
949 | event.data = &con2fb; | |
256154fb AD |
950 | return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
951 | &event); | |
1da177e4 LT |
952 | case FBIOBLANK: |
953 | acquire_console_sem(); | |
954 | info->flags |= FBINFO_MISC_USEREVENT; | |
955 | i = fb_blank(info, arg); | |
956 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
957 | release_console_sem(); | |
958 | return i; | |
959 | default: | |
960 | if (fb->fb_ioctl == NULL) | |
961 | return -EINVAL; | |
67a6680d | 962 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
963 | } |
964 | } | |
965 | ||
966 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
967 | struct fb_fix_screeninfo32 { |
968 | char id[16]; | |
969 | compat_caddr_t smem_start; | |
970 | u32 smem_len; | |
971 | u32 type; | |
972 | u32 type_aux; | |
973 | u32 visual; | |
974 | u16 xpanstep; | |
975 | u16 ypanstep; | |
976 | u16 ywrapstep; | |
977 | u32 line_length; | |
978 | compat_caddr_t mmio_start; | |
979 | u32 mmio_len; | |
980 | u32 accel; | |
981 | u16 reserved[3]; | |
982 | }; | |
983 | ||
984 | struct fb_cmap32 { | |
985 | u32 start; | |
986 | u32 len; | |
987 | compat_caddr_t red; | |
988 | compat_caddr_t green; | |
989 | compat_caddr_t blue; | |
990 | compat_caddr_t transp; | |
991 | }; | |
992 | ||
993 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
994 | unsigned int cmd, unsigned long arg) | |
995 | { | |
996 | struct fb_cmap_user __user *cmap; | |
997 | struct fb_cmap32 __user *cmap32; | |
998 | __u32 data; | |
999 | int err; | |
1000 | ||
1001 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1002 | cmap32 = compat_ptr(arg); | |
1003 | ||
1004 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1005 | return -EFAULT; | |
1006 | ||
1007 | if (get_user(data, &cmap32->red) || | |
1008 | put_user(compat_ptr(data), &cmap->red) || | |
1009 | get_user(data, &cmap32->green) || | |
1010 | put_user(compat_ptr(data), &cmap->green) || | |
1011 | get_user(data, &cmap32->blue) || | |
1012 | put_user(compat_ptr(data), &cmap->blue) || | |
1013 | get_user(data, &cmap32->transp) || | |
1014 | put_user(compat_ptr(data), &cmap->transp)) | |
1015 | return -EFAULT; | |
1016 | ||
1017 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1018 | ||
1019 | if (!err) { | |
1020 | if (copy_in_user(&cmap32->start, | |
1021 | &cmap->start, | |
1022 | 2 * sizeof(__u32))) | |
1023 | err = -EFAULT; | |
1024 | } | |
1025 | return err; | |
1026 | } | |
1027 | ||
1028 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1029 | struct fb_fix_screeninfo32 __user *fix32) | |
1030 | { | |
1031 | __u32 data; | |
1032 | int err; | |
1033 | ||
1034 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1035 | ||
1036 | data = (__u32) (unsigned long) fix->smem_start; | |
1037 | err |= put_user(data, &fix32->smem_start); | |
1038 | ||
1039 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1040 | err |= put_user(fix->type, &fix32->type); | |
1041 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1042 | err |= put_user(fix->visual, &fix32->visual); | |
1043 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1044 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1045 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1046 | err |= put_user(fix->line_length, &fix32->line_length); | |
1047 | ||
1048 | data = (__u32) (unsigned long) fix->mmio_start; | |
1049 | err |= put_user(data, &fix32->mmio_start); | |
1050 | ||
1051 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1052 | err |= put_user(fix->accel, &fix32->accel); | |
1053 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1054 | sizeof(fix->reserved)); | |
1055 | ||
1056 | return err; | |
1057 | } | |
1058 | ||
1059 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1060 | unsigned int cmd, unsigned long arg) | |
1061 | { | |
1062 | mm_segment_t old_fs; | |
1063 | struct fb_fix_screeninfo fix; | |
1064 | struct fb_fix_screeninfo32 __user *fix32; | |
1065 | int err; | |
1066 | ||
1067 | fix32 = compat_ptr(arg); | |
1068 | ||
1069 | old_fs = get_fs(); | |
1070 | set_fs(KERNEL_DS); | |
1071 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1072 | set_fs(old_fs); | |
1073 | ||
1074 | if (!err) | |
1075 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1076 | ||
1077 | return err; | |
1078 | } | |
1079 | ||
1da177e4 LT |
1080 | static long |
1081 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1082 | { | |
ad9a824e | 1083 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1084 | int fbidx = iminor(inode); |
1da177e4 LT |
1085 | struct fb_info *info = registered_fb[fbidx]; |
1086 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1087 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1088 | |
1da177e4 | 1089 | lock_kernel(); |
c7f82d9c AB |
1090 | switch(cmd) { |
1091 | case FBIOGET_VSCREENINFO: | |
1092 | case FBIOPUT_VSCREENINFO: | |
1093 | case FBIOPAN_DISPLAY: | |
1094 | case FBIOGET_CON2FBMAP: | |
1095 | case FBIOPUT_CON2FBMAP: | |
1096 | arg = (unsigned long) compat_ptr(arg); | |
1097 | case FBIOBLANK: | |
1098 | ret = fb_ioctl(inode, file, cmd, arg); | |
1099 | break; | |
1100 | ||
1101 | case FBIOGET_FSCREENINFO: | |
1102 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1103 | break; | |
1104 | ||
1105 | case FBIOGETCMAP: | |
1106 | case FBIOPUTCMAP: | |
1107 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1108 | break; | |
1109 | ||
1110 | default: | |
1111 | if (fb->fb_compat_ioctl) | |
67a6680d | 1112 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1113 | break; |
1114 | } | |
1da177e4 LT |
1115 | unlock_kernel(); |
1116 | return ret; | |
1117 | } | |
1118 | #endif | |
1119 | ||
1120 | static int | |
1121 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
1122 | { | |
ad9a824e | 1123 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1124 | struct fb_info *info = registered_fb[fbidx]; |
1125 | struct fb_ops *fb = info->fbops; | |
1126 | unsigned long off; | |
1127 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
1128 | unsigned long start; | |
1129 | u32 len; | |
1130 | #endif | |
1131 | ||
1132 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1133 | return -EINVAL; | |
1134 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1135 | if (!fb) | |
1136 | return -ENODEV; | |
1137 | if (fb->fb_mmap) { | |
1138 | int res; | |
1139 | lock_kernel(); | |
216d526c | 1140 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1141 | unlock_kernel(); |
1142 | return res; | |
1143 | } | |
1144 | ||
1145 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
1146 | /* Should never get here, all fb drivers should have their own | |
1147 | mmap routines */ | |
1148 | return -EINVAL; | |
1149 | #else | |
1150 | /* !sparc32... */ | |
1151 | lock_kernel(); | |
1152 | ||
1153 | /* frame buffer memory */ | |
1154 | start = info->fix.smem_start; | |
1155 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1156 | if (off >= len) { | |
1157 | /* memory mapped io */ | |
1158 | off -= len; | |
1159 | if (info->var.accel_flags) { | |
1160 | unlock_kernel(); | |
1161 | return -EINVAL; | |
1162 | } | |
1163 | start = info->fix.mmio_start; | |
1164 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1165 | } | |
1166 | unlock_kernel(); | |
1167 | start &= PAGE_MASK; | |
1168 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1169 | return -EINVAL; | |
1170 | off += start; | |
1171 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1172 | /* This is an IO map - tell maydump to skip this VMA */ | |
1173 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
1da177e4 LT |
1174 | #if defined(__mc68000__) |
1175 | #if defined(CONFIG_SUN3) | |
1176 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
1177 | #elif defined(CONFIG_MMU) | |
1178 | if (CPU_IS_020_OR_030) | |
1179 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
1180 | if (CPU_IS_040_OR_060) { | |
1181 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
1182 | /* Use no-cache mode, serialized */ | |
1183 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
1184 | } | |
1185 | #endif | |
1186 | #elif defined(__powerpc__) | |
8b150478 | 1187 | vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT, |
1da177e4 LT |
1188 | vma->vm_end - vma->vm_start, |
1189 | vma->vm_page_prot); | |
1190 | #elif defined(__alpha__) | |
1191 | /* Caching is off in the I/O space quadrant by design. */ | |
1192 | #elif defined(__i386__) || defined(__x86_64__) | |
1193 | if (boot_cpu_data.x86 > 3) | |
1194 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
14778d90 | 1195 | #elif defined(__mips__) || defined(__sparc_v9__) |
1da177e4 LT |
1196 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1197 | #elif defined(__hppa__) | |
1198 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
1199 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
1200 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1201 | #elif defined(__ia64__) | |
1202 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
1203 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1204 | else | |
1205 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1206 | #else | |
1207 | #warning What do we have to do here?? | |
1208 | #endif | |
1209 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
1210 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1211 | return -EAGAIN; | |
1da177e4 LT |
1212 | return 0; |
1213 | #endif /* !sparc32 */ | |
1214 | } | |
1215 | ||
1216 | static int | |
1217 | fb_open(struct inode *inode, struct file *file) | |
1218 | { | |
1219 | int fbidx = iminor(inode); | |
1220 | struct fb_info *info; | |
1221 | int res = 0; | |
1222 | ||
1223 | if (fbidx >= FB_MAX) | |
1224 | return -ENODEV; | |
1225 | #ifdef CONFIG_KMOD | |
1226 | if (!(info = registered_fb[fbidx])) | |
1227 | try_to_load(fbidx); | |
1228 | #endif /* CONFIG_KMOD */ | |
1229 | if (!(info = registered_fb[fbidx])) | |
1230 | return -ENODEV; | |
1231 | if (!try_module_get(info->fbops->owner)) | |
1232 | return -ENODEV; | |
cae8a12f | 1233 | file->private_data = info; |
1da177e4 LT |
1234 | if (info->fbops->fb_open) { |
1235 | res = info->fbops->fb_open(info,1); | |
1236 | if (res) | |
1237 | module_put(info->fbops->owner); | |
1238 | } | |
1239 | return res; | |
1240 | } | |
1241 | ||
1242 | static int | |
1243 | fb_release(struct inode *inode, struct file *file) | |
1244 | { | |
cae8a12f | 1245 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1246 | |
1247 | lock_kernel(); | |
1da177e4 LT |
1248 | if (info->fbops->fb_release) |
1249 | info->fbops->fb_release(info,1); | |
1250 | module_put(info->fbops->owner); | |
1251 | unlock_kernel(); | |
1252 | return 0; | |
1253 | } | |
1254 | ||
0128beee | 1255 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1256 | .owner = THIS_MODULE, |
1257 | .read = fb_read, | |
1258 | .write = fb_write, | |
1259 | .ioctl = fb_ioctl, | |
1260 | #ifdef CONFIG_COMPAT | |
1261 | .compat_ioctl = fb_compat_ioctl, | |
1262 | #endif | |
1263 | .mmap = fb_mmap, | |
1264 | .open = fb_open, | |
1265 | .release = fb_release, | |
1266 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1267 | .get_unmapped_area = get_fb_unmapped_area, | |
1268 | #endif | |
1269 | }; | |
1270 | ||
9a179176 AD |
1271 | struct class *fb_class; |
1272 | EXPORT_SYMBOL(fb_class); | |
1da177e4 LT |
1273 | /** |
1274 | * register_framebuffer - registers a frame buffer device | |
1275 | * @fb_info: frame buffer info structure | |
1276 | * | |
1277 | * Registers a frame buffer device @fb_info. | |
1278 | * | |
1279 | * Returns negative errno on error, or zero for success. | |
1280 | * | |
1281 | */ | |
1282 | ||
1283 | int | |
1284 | register_framebuffer(struct fb_info *fb_info) | |
1285 | { | |
1286 | int i; | |
1287 | struct fb_event event; | |
96fe6a21 | 1288 | struct fb_videomode mode; |
1da177e4 LT |
1289 | |
1290 | if (num_registered_fb == FB_MAX) | |
1291 | return -ENXIO; | |
1292 | num_registered_fb++; | |
1293 | for (i = 0 ; i < FB_MAX; i++) | |
1294 | if (!registered_fb[i]) | |
1295 | break; | |
1296 | fb_info->node = i; | |
1297 | ||
78cde088 GKH |
1298 | fb_info->dev = device_create(fb_class, fb_info->device, |
1299 | MKDEV(FB_MAJOR, i), "fb%d", i); | |
1300 | if (IS_ERR(fb_info->dev)) { | |
1da177e4 | 1301 | /* Not fatal */ |
78cde088 GKH |
1302 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1303 | fb_info->dev = NULL; | |
1da177e4 | 1304 | } else |
78cde088 | 1305 | fb_init_device(fb_info); |
1da177e4 LT |
1306 | |
1307 | if (fb_info->pixmap.addr == NULL) { | |
1308 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1309 | if (fb_info->pixmap.addr) { | |
1310 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1311 | fb_info->pixmap.buf_align = 1; | |
1312 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1313 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1314 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1315 | } | |
1316 | } | |
1317 | fb_info->pixmap.offset = 0; | |
1318 | ||
96fe6a21 | 1319 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1320 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1321 | |
96fe6a21 AD |
1322 | fb_var_to_videomode(&mode, &fb_info->var); |
1323 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1324 | registered_fb[i] = fb_info; |
1325 | ||
1da177e4 | 1326 | event.info = fb_info; |
256154fb | 1327 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1328 | return 0; |
1329 | } | |
1330 | ||
1331 | ||
1332 | /** | |
1333 | * unregister_framebuffer - releases a frame buffer device | |
1334 | * @fb_info: frame buffer info structure | |
1335 | * | |
1336 | * Unregisters a frame buffer device @fb_info. | |
1337 | * | |
1338 | * Returns negative errno on error, or zero for success. | |
1339 | * | |
1340 | */ | |
1341 | ||
1342 | int | |
1343 | unregister_framebuffer(struct fb_info *fb_info) | |
1344 | { | |
e614b18d | 1345 | struct fb_event event; |
1da177e4 LT |
1346 | int i; |
1347 | ||
1348 | i = fb_info->node; | |
1349 | if (!registered_fb[i]) | |
1350 | return -EINVAL; | |
1da177e4 | 1351 | |
e614b18d AD |
1352 | if (fb_info->pixmap.addr && |
1353 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1354 | kfree(fb_info->pixmap.addr); |
1355 | fb_destroy_modelist(&fb_info->modelist); | |
1356 | registered_fb[i]=NULL; | |
1357 | num_registered_fb--; | |
78cde088 GKH |
1358 | fb_cleanup_device(fb_info); |
1359 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1360 | event.info = fb_info; |
256154fb | 1361 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
1da177e4 LT |
1362 | return 0; |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | /** |
1366 | * fb_set_suspend - low level driver signals suspend | |
1367 | * @info: framebuffer affected | |
1368 | * @state: 0 = resuming, !=0 = suspending | |
1369 | * | |
1370 | * This is meant to be used by low level drivers to | |
1371 | * signal suspend/resume to the core & clients. | |
1372 | * It must be called with the console semaphore held | |
1373 | */ | |
1374 | void fb_set_suspend(struct fb_info *info, int state) | |
1375 | { | |
1376 | struct fb_event event; | |
1377 | ||
1378 | event.info = info; | |
1379 | if (state) { | |
256154fb | 1380 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1381 | info->state = FBINFO_STATE_SUSPENDED; |
1382 | } else { | |
1383 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1384 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1385 | } |
1386 | } | |
1387 | ||
1388 | /** | |
1389 | * fbmem_init - init frame buffer subsystem | |
1390 | * | |
1391 | * Initialize the frame buffer subsystem. | |
1392 | * | |
1393 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1394 | * | |
1395 | */ | |
1396 | ||
1397 | static int __init | |
1398 | fbmem_init(void) | |
1399 | { | |
1400 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1401 | ||
1da177e4 LT |
1402 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1403 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1404 | ||
56b22935 | 1405 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1406 | if (IS_ERR(fb_class)) { |
1407 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1408 | fb_class = NULL; | |
1409 | } | |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | #ifdef MODULE | |
1414 | module_init(fbmem_init); | |
1415 | static void __exit | |
1416 | fbmem_exit(void) | |
1417 | { | |
56b22935 | 1418 | class_destroy(fb_class); |
5a340cce | 1419 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1420 | } |
1421 | ||
1422 | module_exit(fbmem_exit); | |
1423 | MODULE_LICENSE("GPL"); | |
1424 | MODULE_DESCRIPTION("Framebuffer base"); | |
1425 | #else | |
1426 | subsys_initcall(fbmem_init); | |
1427 | #endif | |
1428 | ||
1429 | int fb_new_modelist(struct fb_info *info) | |
1430 | { | |
1431 | struct fb_event event; | |
1432 | struct fb_var_screeninfo var = info->var; | |
1433 | struct list_head *pos, *n; | |
1434 | struct fb_modelist *modelist; | |
1435 | struct fb_videomode *m, mode; | |
1436 | int err = 1; | |
1437 | ||
1438 | list_for_each_safe(pos, n, &info->modelist) { | |
1439 | modelist = list_entry(pos, struct fb_modelist, list); | |
1440 | m = &modelist->mode; | |
1441 | fb_videomode_to_var(&var, m); | |
1442 | var.activate = FB_ACTIVATE_TEST; | |
1443 | err = fb_set_var(info, &var); | |
1444 | fb_var_to_videomode(&mode, &var); | |
1445 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1446 | list_del(pos); | |
1447 | kfree(pos); | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | err = 1; | |
1452 | ||
1453 | if (!list_empty(&info->modelist)) { | |
1454 | event.info = info; | |
256154fb | 1455 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1456 | } |
1457 | ||
1458 | return err; | |
1459 | } | |
1460 | ||
0128beee HD |
1461 | static char *video_options[FB_MAX] __read_mostly; |
1462 | static int ofonly __read_mostly; | |
1da177e4 | 1463 | |
4dc3b16b PP |
1464 | extern const char *global_mode_option; |
1465 | ||
1da177e4 LT |
1466 | /** |
1467 | * fb_get_options - get kernel boot parameters | |
1468 | * @name: framebuffer name as it would appear in | |
1469 | * the boot parameter line | |
1470 | * (video=<name>:<options>) | |
1471 | * @option: the option will be stored here | |
1472 | * | |
1473 | * NOTE: Needed to maintain backwards compatibility | |
1474 | */ | |
1475 | int fb_get_options(char *name, char **option) | |
1476 | { | |
1477 | char *opt, *options = NULL; | |
1478 | int opt_len, retval = 0; | |
1479 | int name_len = strlen(name), i; | |
1480 | ||
1481 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1482 | retval = 1; | |
1483 | ||
1484 | if (name_len && !retval) { | |
1485 | for (i = 0; i < FB_MAX; i++) { | |
1486 | if (video_options[i] == NULL) | |
1487 | continue; | |
1488 | opt_len = strlen(video_options[i]); | |
1489 | if (!opt_len) | |
1490 | continue; | |
1491 | opt = video_options[i]; | |
1492 | if (!strncmp(name, opt, name_len) && | |
1493 | opt[name_len] == ':') | |
1494 | options = opt + name_len + 1; | |
1495 | } | |
1496 | } | |
1497 | if (options && !strncmp(options, "off", 3)) | |
1498 | retval = 1; | |
1499 | ||
1500 | if (option) | |
1501 | *option = options; | |
1502 | ||
1503 | return retval; | |
1504 | } | |
1505 | ||
bc6d7fdf | 1506 | #ifndef MODULE |
1da177e4 LT |
1507 | /** |
1508 | * video_setup - process command line options | |
1509 | * @options: string of options | |
1510 | * | |
1511 | * Process command line options for frame buffer subsystem. | |
1512 | * | |
1513 | * NOTE: This function is a __setup and __init function. | |
1514 | * It only stores the options. Drivers have to call | |
1515 | * fb_get_options() as necessary. | |
1516 | * | |
1517 | * Returns zero. | |
1518 | * | |
1519 | */ | |
75c96f85 | 1520 | static int __init video_setup(char *options) |
1da177e4 LT |
1521 | { |
1522 | int i, global = 0; | |
1523 | ||
1524 | if (!options || !*options) | |
1525 | global = 1; | |
1526 | ||
1527 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1528 | ofonly = 1; | |
1529 | global = 1; | |
1530 | } | |
1531 | ||
1532 | if (!global && !strstr(options, "fb:")) { | |
1533 | global_mode_option = options; | |
1534 | global = 1; | |
1535 | } | |
1536 | ||
1537 | if (!global) { | |
1538 | for (i = 0; i < FB_MAX; i++) { | |
1539 | if (video_options[i] == NULL) { | |
1540 | video_options[i] = options; | |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | } | |
1545 | } | |
1546 | ||
9b41046c | 1547 | return 1; |
1da177e4 LT |
1548 | } |
1549 | __setup("video=", video_setup); | |
bc6d7fdf | 1550 | #endif |
1da177e4 LT |
1551 | |
1552 | /* | |
1553 | * Visible symbols for modules | |
1554 | */ | |
1555 | ||
1556 | EXPORT_SYMBOL(register_framebuffer); | |
1557 | EXPORT_SYMBOL(unregister_framebuffer); | |
1558 | EXPORT_SYMBOL(num_registered_fb); | |
1559 | EXPORT_SYMBOL(registered_fb); | |
1560 | EXPORT_SYMBOL(fb_prepare_logo); | |
1561 | EXPORT_SYMBOL(fb_show_logo); | |
1562 | EXPORT_SYMBOL(fb_set_var); | |
1563 | EXPORT_SYMBOL(fb_blank); | |
1564 | EXPORT_SYMBOL(fb_pan_display); | |
1565 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1566 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1567 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1568 | |
1569 | MODULE_LICENSE("GPL"); |