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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> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/smp_lock.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/major.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/mman.h> | |
a8f340e3 | 26 | #include <linux/vt.h> |
1da177e4 LT |
27 | #include <linux/init.h> |
28 | #include <linux/linux_logo.h> | |
29 | #include <linux/proc_fs.h> | |
30 | #include <linux/console.h> | |
31 | #ifdef CONFIG_KMOD | |
32 | #include <linux/kmod.h> | |
33 | #endif | |
1da177e4 | 34 | #include <linux/err.h> |
1da177e4 LT |
35 | #include <linux/device.h> |
36 | #include <linux/efi.h> | |
37 | ||
38 | #if defined(__mc68000__) || defined(CONFIG_APUS) | |
39 | #include <asm/setup.h> | |
40 | #endif | |
41 | ||
42 | #include <asm/io.h> | |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/page.h> | |
45 | #include <asm/pgtable.h> | |
46 | ||
47 | #include <linux/fb.h> | |
48 | ||
49 | /* | |
50 | * Frame buffer device initialization and setup routines | |
51 | */ | |
52 | ||
53 | #define FBPIXMAPSIZE (1024 * 8) | |
54 | ||
1da177e4 LT |
55 | struct fb_info *registered_fb[FB_MAX]; |
56 | int num_registered_fb; | |
57 | ||
58 | /* | |
59 | * Helpers | |
60 | */ | |
61 | ||
b8c90945 AD |
62 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
63 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 64 | { |
b8c90945 AD |
65 | int depth = 0; |
66 | ||
67 | if (fix->visual == FB_VISUAL_MONO01 || | |
68 | fix->visual == FB_VISUAL_MONO10) | |
69 | depth = 1; | |
70 | else { | |
71 | if (var->green.length == var->blue.length && | |
72 | var->green.length == var->red.length && | |
73 | var->green.offset == var->blue.offset && | |
74 | var->green.offset == var->red.offset) | |
75 | depth = var->green.length; | |
76 | else | |
77 | depth = var->green.length + var->red.length + | |
78 | var->blue.length; | |
79 | } | |
80 | ||
81 | return depth; | |
1da177e4 LT |
82 | } |
83 | EXPORT_SYMBOL(fb_get_color_depth); | |
84 | ||
85 | /* | |
f5a9951c | 86 | * Data padding functions. |
1da177e4 | 87 | */ |
f1ab5dac | 88 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 89 | { |
829e79b6 | 90 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 91 | } |
f1ab5dac | 92 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 93 | |
f1ab5dac JS |
94 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
95 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
96 | { |
97 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
98 | int i, j; | |
99 | ||
100 | for (i = height; i--; ) { | |
101 | for (j = 0; j < idx; j++) { | |
102 | tmp = dst[j]; | |
103 | tmp &= mask; | |
104 | tmp |= *src >> shift_low; | |
105 | dst[j] = tmp; | |
106 | tmp = *src << shift_high; | |
107 | dst[j+1] = tmp; | |
108 | src++; | |
109 | } | |
110 | tmp = dst[idx]; | |
111 | tmp &= mask; | |
112 | tmp |= *src >> shift_low; | |
113 | dst[idx] = tmp; | |
114 | if (shift_high < mod) { | |
115 | tmp = *src << shift_high; | |
116 | dst[idx+1] = tmp; | |
117 | } | |
118 | src++; | |
119 | dst += d_pitch; | |
120 | } | |
121 | } | |
f1ab5dac | 122 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
123 | |
124 | /* | |
125 | * we need to lock this section since fb_cursor | |
126 | * may use fb_imageblit() | |
127 | */ | |
128 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
129 | { | |
130 | u32 align = buf->buf_align - 1, offset; | |
131 | char *addr = buf->addr; | |
132 | ||
133 | /* If IO mapped, we need to sync before access, no sharing of | |
134 | * the pixmap is done | |
135 | */ | |
136 | if (buf->flags & FB_PIXMAP_IO) { | |
137 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
138 | info->fbops->fb_sync(info); | |
139 | return addr; | |
140 | } | |
141 | ||
142 | /* See if we fit in the remaining pixmap space */ | |
143 | offset = buf->offset + align; | |
144 | offset &= ~align; | |
145 | if (offset + size > buf->size) { | |
146 | /* We do not fit. In order to be able to re-use the buffer, | |
147 | * we must ensure no asynchronous DMA'ing or whatever operation | |
148 | * is in progress, we sync for that. | |
149 | */ | |
150 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
151 | info->fbops->fb_sync(info); | |
152 | offset = 0; | |
153 | } | |
154 | buf->offset = offset + size; | |
155 | addr += offset; | |
156 | ||
157 | return addr; | |
158 | } | |
159 | ||
160 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
161 | |
162 | static inline unsigned safe_shift(unsigned d, int n) | |
163 | { | |
164 | return n < 0 ? d >> -n : d << n; | |
165 | } | |
166 | ||
167 | static void fb_set_logocmap(struct fb_info *info, | |
168 | const struct linux_logo *logo) | |
169 | { | |
170 | struct fb_cmap palette_cmap; | |
171 | u16 palette_green[16]; | |
172 | u16 palette_blue[16]; | |
173 | u16 palette_red[16]; | |
174 | int i, j, n; | |
175 | const unsigned char *clut = logo->clut; | |
176 | ||
177 | palette_cmap.start = 0; | |
178 | palette_cmap.len = 16; | |
179 | palette_cmap.red = palette_red; | |
180 | palette_cmap.green = palette_green; | |
181 | palette_cmap.blue = palette_blue; | |
182 | palette_cmap.transp = NULL; | |
183 | ||
184 | for (i = 0; i < logo->clutsize; i += n) { | |
185 | n = logo->clutsize - i; | |
186 | /* palette_cmap provides space for only 16 colors at once */ | |
187 | if (n > 16) | |
188 | n = 16; | |
189 | palette_cmap.start = 32 + i; | |
190 | palette_cmap.len = n; | |
191 | for (j = 0; j < n; ++j) { | |
192 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
193 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
194 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
195 | clut += 3; | |
196 | } | |
197 | fb_set_cmap(&palette_cmap, info); | |
198 | } | |
199 | } | |
200 | ||
201 | static void fb_set_logo_truepalette(struct fb_info *info, | |
202 | const struct linux_logo *logo, | |
203 | u32 *palette) | |
204 | { | |
205 | unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; | |
206 | unsigned char redmask, greenmask, bluemask; | |
207 | int redshift, greenshift, blueshift; | |
208 | int i; | |
209 | const unsigned char *clut = logo->clut; | |
210 | ||
211 | /* | |
212 | * We have to create a temporary palette since console palette is only | |
213 | * 16 colors long. | |
214 | */ | |
215 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
216 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
217 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
218 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
219 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
220 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
221 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
222 | ||
223 | for ( i = 0; i < logo->clutsize; i++) { | |
224 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
225 | safe_shift((clut[1] & greenmask), greenshift) | | |
226 | safe_shift((clut[2] & bluemask), blueshift)); | |
227 | clut += 3; | |
228 | } | |
229 | } | |
230 | ||
231 | static void fb_set_logo_directpalette(struct fb_info *info, | |
232 | const struct linux_logo *logo, | |
233 | u32 *palette) | |
234 | { | |
235 | int redshift, greenshift, blueshift; | |
236 | int i; | |
237 | ||
238 | redshift = info->var.red.offset; | |
239 | greenshift = info->var.green.offset; | |
240 | blueshift = info->var.blue.offset; | |
241 | ||
242 | for (i = 32; i < logo->clutsize; i++) | |
243 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
244 | } | |
245 | ||
246 | static void fb_set_logo(struct fb_info *info, | |
247 | const struct linux_logo *logo, u8 *dst, | |
248 | int depth) | |
249 | { | |
b8c90945 | 250 | int i, j, k; |
1da177e4 | 251 | const u8 *src = logo->data; |
b8c90945 AD |
252 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
253 | u8 fg = 1, d; | |
1da177e4 | 254 | |
b8c90945 | 255 | if (fb_get_color_depth(&info->var, &info->fix) == 3) |
1da177e4 LT |
256 | fg = 7; |
257 | ||
b8c90945 AD |
258 | if (info->fix.visual == FB_VISUAL_MONO01 || |
259 | info->fix.visual == FB_VISUAL_MONO10) | |
260 | fg = ~((u8) (0xfff << info->var.green.length)); | |
261 | ||
1da177e4 LT |
262 | switch (depth) { |
263 | case 4: | |
264 | for (i = 0; i < logo->height; i++) | |
265 | for (j = 0; j < logo->width; src++) { | |
266 | *dst++ = *src >> 4; | |
267 | j++; | |
268 | if (j < logo->width) { | |
269 | *dst++ = *src & 0x0f; | |
270 | j++; | |
271 | } | |
272 | } | |
273 | break; | |
274 | case 1: | |
275 | for (i = 0; i < logo->height; i++) { | |
276 | for (j = 0; j < logo->width; src++) { | |
277 | d = *src ^ xor; | |
278 | for (k = 7; k >= 0; k--) { | |
279 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
280 | j++; | |
281 | } | |
282 | } | |
283 | } | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
288 | /* | |
289 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
290 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
291 | * the visual format and color depth of the framebuffer, the DAC, the | |
292 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
293 | * | |
294 | * Case 1 - linux_logo_clut224: | |
295 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
296 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
297 | * | |
298 | * For visuals that require color info from the pseudo_palette, we also construct | |
299 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
300 | * will be set. | |
301 | * | |
302 | * Case 2 - linux_logo_vga16: | |
303 | * The number of colors just matches the console colors, thus there is no need | |
304 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
305 | * each byte contains color information for two pixels (upper and lower nibble). | |
306 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
307 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
308 | * | |
309 | * Case 3 - linux_logo_mono: | |
310 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
311 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
312 | * be set to 1. | |
313 | */ | |
314 | static struct logo_data { | |
315 | int depth; | |
316 | int needs_directpalette; | |
317 | int needs_truepalette; | |
318 | int needs_cmapreset; | |
319 | const struct linux_logo *logo; | |
320 | } fb_logo; | |
321 | ||
9c44e5f6 AD |
322 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
323 | { | |
324 | u32 size = width * height, i; | |
325 | ||
326 | out += size - 1; | |
327 | ||
328 | for (i = size; i--; ) | |
329 | *out-- = *in++; | |
330 | } | |
331 | ||
332 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
333 | { | |
f837e6f7 | 334 | int i, j, h = height - 1; |
9c44e5f6 AD |
335 | |
336 | for (i = 0; i < height; i++) | |
337 | for (j = 0; j < width; j++) | |
f837e6f7 | 338 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
339 | } |
340 | ||
341 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
342 | { | |
343 | int i, j, w = width - 1; | |
344 | ||
345 | for (i = 0; i < height; i++) | |
346 | for (j = 0; j < width; j++) | |
347 | out[height * (w - j) + i] = *in++; | |
348 | } | |
349 | ||
350 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
351 | struct fb_image *image, int rotate) | |
352 | { | |
353 | u32 tmp; | |
354 | ||
355 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
356 | fb_rotate_logo_ud(image->data, dst, image->width, |
357 | image->height); | |
f837e6f7 AD |
358 | image->dx = info->var.xres - image->width; |
359 | image->dy = info->var.yres - image->height; | |
9c44e5f6 | 360 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
361 | fb_rotate_logo_cw(image->data, dst, image->width, |
362 | image->height); | |
9c44e5f6 AD |
363 | tmp = image->width; |
364 | image->width = image->height; | |
365 | image->height = tmp; | |
f837e6f7 AD |
366 | image->dx = info->var.xres - image->width; |
367 | } else if (rotate == FB_ROTATE_CCW) { | |
9c44e5f6 AD |
368 | fb_rotate_logo_ccw(image->data, dst, image->width, |
369 | image->height); | |
f837e6f7 AD |
370 | tmp = image->width; |
371 | image->width = image->height; | |
372 | image->height = tmp; | |
373 | image->dy = info->var.yres - image->height; | |
9c44e5f6 AD |
374 | } |
375 | ||
376 | image->data = dst; | |
377 | } | |
378 | ||
379 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
380 | int rotate) | |
381 | { | |
382 | int x; | |
383 | ||
384 | if (rotate == FB_ROTATE_UR) { | |
385 | for (x = 0; x < num_online_cpus() && | |
386 | x * (fb_logo.logo->width + 8) <= | |
387 | info->var.xres - fb_logo.logo->width; x++) { | |
388 | info->fbops->fb_imageblit(info, image); | |
389 | image->dx += fb_logo.logo->width + 8; | |
390 | } | |
391 | } else if (rotate == FB_ROTATE_UD) { | |
392 | for (x = 0; x < num_online_cpus() && | |
393 | x * (fb_logo.logo->width + 8) <= | |
394 | info->var.xres - fb_logo.logo->width; x++) { | |
395 | info->fbops->fb_imageblit(info, image); | |
396 | image->dx -= fb_logo.logo->width + 8; | |
397 | } | |
398 | } else if (rotate == FB_ROTATE_CW) { | |
399 | for (x = 0; x < num_online_cpus() && | |
400 | x * (fb_logo.logo->width + 8) <= | |
401 | info->var.yres - fb_logo.logo->width; x++) { | |
402 | info->fbops->fb_imageblit(info, image); | |
403 | image->dy += fb_logo.logo->width + 8; | |
404 | } | |
405 | } else if (rotate == FB_ROTATE_CCW) { | |
406 | for (x = 0; x < num_online_cpus() && | |
407 | x * (fb_logo.logo->width + 8) <= | |
408 | info->var.yres - fb_logo.logo->width; x++) { | |
409 | info->fbops->fb_imageblit(info, image); | |
410 | image->dy -= fb_logo.logo->width + 8; | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
1da177e4 | 416 | { |
b8c90945 | 417 | int depth = fb_get_color_depth(&info->var, &info->fix); |
9c44e5f6 | 418 | int yres; |
1da177e4 LT |
419 | |
420 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
421 | ||
422 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
423 | return 0; | |
424 | ||
425 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
426 | depth = info->var.blue.length; | |
427 | if (info->var.red.length < depth) | |
428 | depth = info->var.red.length; | |
429 | if (info->var.green.length < depth) | |
430 | depth = info->var.green.length; | |
431 | } | |
432 | ||
0c683dbf | 433 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
397eeab3 AD |
434 | /* assume console colormap */ |
435 | depth = 4; | |
436 | } | |
437 | ||
1da177e4 LT |
438 | if (depth >= 8) { |
439 | switch (info->fix.visual) { | |
440 | case FB_VISUAL_TRUECOLOR: | |
441 | fb_logo.needs_truepalette = 1; | |
442 | break; | |
443 | case FB_VISUAL_DIRECTCOLOR: | |
444 | fb_logo.needs_directpalette = 1; | |
445 | fb_logo.needs_cmapreset = 1; | |
446 | break; | |
447 | case FB_VISUAL_PSEUDOCOLOR: | |
448 | fb_logo.needs_cmapreset = 1; | |
449 | break; | |
450 | } | |
451 | } | |
452 | ||
453 | /* Return if no suitable logo was found */ | |
454 | fb_logo.logo = fb_find_logo(depth); | |
6d9885a8 JS |
455 | |
456 | if (!fb_logo.logo) { | |
457 | return 0; | |
458 | } | |
1da177e4 | 459 | |
9c44e5f6 AD |
460 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
461 | yres = info->var.yres; | |
462 | else | |
463 | yres = info->var.xres; | |
464 | ||
6d9885a8 | 465 | if (fb_logo.logo->height > yres) { |
1da177e4 LT |
466 | fb_logo.logo = NULL; |
467 | return 0; | |
468 | } | |
9c44e5f6 | 469 | |
1da177e4 LT |
470 | /* What depth we asked for might be different from what we get */ |
471 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
472 | fb_logo.depth = 8; | |
473 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
474 | fb_logo.depth = 4; | |
475 | else | |
476 | fb_logo.depth = 1; | |
477 | return fb_logo.logo->height; | |
478 | } | |
479 | ||
9c44e5f6 | 480 | int fb_show_logo(struct fb_info *info, int rotate) |
1da177e4 LT |
481 | { |
482 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 483 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 484 | struct fb_image image; |
1da177e4 LT |
485 | |
486 | /* Return if the frame buffer is not mapped or suspended */ | |
487 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
488 | return 0; | |
489 | ||
490 | image.depth = 8; | |
491 | image.data = fb_logo.logo->data; | |
492 | ||
493 | if (fb_logo.needs_cmapreset) | |
494 | fb_set_logocmap(info, fb_logo.logo); | |
495 | ||
496 | if (fb_logo.needs_truepalette || | |
497 | fb_logo.needs_directpalette) { | |
498 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
499 | if (palette == NULL) | |
500 | return 0; | |
501 | ||
502 | if (fb_logo.needs_truepalette) | |
503 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
504 | else | |
505 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
506 | ||
507 | saved_pseudo_palette = info->pseudo_palette; | |
508 | info->pseudo_palette = palette; | |
509 | } | |
510 | ||
511 | if (fb_logo.depth <= 4) { | |
512 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
513 | GFP_KERNEL); | |
514 | if (logo_new == NULL) { | |
515 | kfree(palette); | |
516 | if (saved_pseudo_palette) | |
517 | info->pseudo_palette = saved_pseudo_palette; | |
518 | return 0; | |
519 | } | |
520 | image.data = logo_new; | |
521 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
522 | } | |
523 | ||
9c44e5f6 AD |
524 | image.dx = 0; |
525 | image.dy = 0; | |
1da177e4 LT |
526 | image.width = fb_logo.logo->width; |
527 | image.height = fb_logo.logo->height; | |
1da177e4 | 528 | |
9c44e5f6 AD |
529 | if (rotate) { |
530 | logo_rotate = kmalloc(fb_logo.logo->width * | |
531 | fb_logo.logo->height, GFP_KERNEL); | |
532 | if (logo_rotate) | |
533 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 534 | } |
9c44e5f6 AD |
535 | |
536 | fb_do_show_logo(info, &image, rotate); | |
537 | ||
1da177e4 LT |
538 | kfree(palette); |
539 | if (saved_pseudo_palette != NULL) | |
540 | info->pseudo_palette = saved_pseudo_palette; | |
541 | kfree(logo_new); | |
9c44e5f6 | 542 | kfree(logo_rotate); |
1da177e4 LT |
543 | return fb_logo.logo->height; |
544 | } | |
545 | #else | |
9c44e5f6 AD |
546 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
547 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
548 | #endif /* CONFIG_LOGO */ |
549 | ||
550 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
551 | int len, int *eof, void *private) | |
552 | { | |
553 | struct fb_info **fi; | |
554 | int clen; | |
555 | ||
556 | clen = 0; | |
a09fd48f GU |
557 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && clen < 4000; |
558 | fi++) | |
1da177e4 LT |
559 | if (*fi) |
560 | clen += sprintf(buf + clen, "%d %s\n", | |
561 | (*fi)->node, | |
562 | (*fi)->fix.id); | |
563 | *start = buf + offset; | |
564 | if (clen > offset) | |
565 | clen -= offset; | |
566 | else | |
567 | clen = 0; | |
568 | return clen < len ? clen : len; | |
569 | } | |
570 | ||
571 | static ssize_t | |
572 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
573 | { | |
574 | unsigned long p = *ppos; | |
ad9a824e | 575 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
576 | int fbidx = iminor(inode); |
577 | struct fb_info *info = registered_fb[fbidx]; | |
578 | u32 *buffer, *dst; | |
579 | u32 __iomem *src; | |
580 | int c, i, cnt = 0, err = 0; | |
581 | unsigned long total_size; | |
582 | ||
583 | if (!info || ! info->screen_base) | |
584 | return -ENODEV; | |
585 | ||
586 | if (info->state != FBINFO_STATE_RUNNING) | |
587 | return -EPERM; | |
588 | ||
589 | if (info->fbops->fb_read) | |
590 | return info->fbops->fb_read(file, buf, count, ppos); | |
591 | ||
592 | total_size = info->screen_size; | |
0a484a3a | 593 | |
1da177e4 LT |
594 | if (total_size == 0) |
595 | total_size = info->fix.smem_len; | |
596 | ||
597 | if (p >= total_size) | |
0a484a3a AD |
598 | return 0; |
599 | ||
1da177e4 | 600 | if (count >= total_size) |
0a484a3a AD |
601 | count = total_size; |
602 | ||
1da177e4 LT |
603 | if (count + p > total_size) |
604 | count = total_size - p; | |
605 | ||
1da177e4 LT |
606 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
607 | GFP_KERNEL); | |
608 | if (!buffer) | |
609 | return -ENOMEM; | |
610 | ||
611 | src = (u32 __iomem *) (info->screen_base + p); | |
612 | ||
613 | if (info->fbops->fb_sync) | |
614 | info->fbops->fb_sync(info); | |
615 | ||
616 | while (count) { | |
617 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
618 | dst = buffer; | |
619 | for (i = c >> 2; i--; ) | |
620 | *dst++ = fb_readl(src++); | |
621 | if (c & 3) { | |
622 | u8 *dst8 = (u8 *) dst; | |
623 | u8 __iomem *src8 = (u8 __iomem *) src; | |
624 | ||
625 | for (i = c & 3; i--;) | |
626 | *dst8++ = fb_readb(src8++); | |
627 | ||
628 | src = (u32 __iomem *) src8; | |
629 | } | |
630 | ||
631 | if (copy_to_user(buf, buffer, c)) { | |
632 | err = -EFAULT; | |
633 | break; | |
634 | } | |
635 | *ppos += c; | |
636 | buf += c; | |
637 | cnt += c; | |
638 | count -= c; | |
639 | } | |
640 | ||
641 | kfree(buffer); | |
0a484a3a | 642 | |
1da177e4 LT |
643 | return (err) ? err : cnt; |
644 | } | |
645 | ||
646 | static ssize_t | |
647 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
648 | { | |
649 | unsigned long p = *ppos; | |
ad9a824e | 650 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
651 | int fbidx = iminor(inode); |
652 | struct fb_info *info = registered_fb[fbidx]; | |
653 | u32 *buffer, *src; | |
654 | u32 __iomem *dst; | |
0a484a3a | 655 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
656 | unsigned long total_size; |
657 | ||
658 | if (!info || !info->screen_base) | |
659 | return -ENODEV; | |
660 | ||
661 | if (info->state != FBINFO_STATE_RUNNING) | |
662 | return -EPERM; | |
663 | ||
664 | if (info->fbops->fb_write) | |
665 | return info->fbops->fb_write(file, buf, count, ppos); | |
666 | ||
667 | total_size = info->screen_size; | |
0a484a3a | 668 | |
1da177e4 LT |
669 | if (total_size == 0) |
670 | total_size = info->fix.smem_len; | |
671 | ||
672 | if (p > total_size) | |
6a2a8866 | 673 | return -EFBIG; |
0a484a3a | 674 | |
6a2a8866 AD |
675 | if (count > total_size) { |
676 | err = -EFBIG; | |
0a484a3a | 677 | count = total_size; |
6a2a8866 AD |
678 | } |
679 | ||
680 | if (count + p > total_size) { | |
681 | if (!err) | |
682 | err = -ENOSPC; | |
0a484a3a | 683 | |
0a484a3a | 684 | count = total_size - p; |
6a2a8866 | 685 | } |
0a484a3a | 686 | |
1da177e4 LT |
687 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
688 | GFP_KERNEL); | |
689 | if (!buffer) | |
690 | return -ENOMEM; | |
691 | ||
692 | dst = (u32 __iomem *) (info->screen_base + p); | |
693 | ||
694 | if (info->fbops->fb_sync) | |
695 | info->fbops->fb_sync(info); | |
696 | ||
697 | while (count) { | |
698 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
699 | src = buffer; | |
0a484a3a | 700 | |
1da177e4 LT |
701 | if (copy_from_user(src, buf, c)) { |
702 | err = -EFAULT; | |
703 | break; | |
704 | } | |
0a484a3a | 705 | |
1da177e4 LT |
706 | for (i = c >> 2; i--; ) |
707 | fb_writel(*src++, dst++); | |
0a484a3a | 708 | |
1da177e4 LT |
709 | if (c & 3) { |
710 | u8 *src8 = (u8 *) src; | |
711 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
712 | ||
713 | for (i = c & 3; i--; ) | |
714 | fb_writeb(*src8++, dst8++); | |
715 | ||
716 | dst = (u32 __iomem *) dst8; | |
717 | } | |
0a484a3a | 718 | |
1da177e4 LT |
719 | *ppos += c; |
720 | buf += c; | |
721 | cnt += c; | |
722 | count -= c; | |
723 | } | |
0a484a3a | 724 | |
1da177e4 LT |
725 | kfree(buffer); |
726 | ||
6a2a8866 | 727 | return (cnt) ? cnt : err; |
1da177e4 LT |
728 | } |
729 | ||
730 | #ifdef CONFIG_KMOD | |
731 | static void try_to_load(int fb) | |
732 | { | |
733 | request_module("fb%d", fb); | |
734 | } | |
735 | #endif /* CONFIG_KMOD */ | |
736 | ||
737 | int | |
738 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
739 | { | |
1207069f | 740 | struct fb_fix_screeninfo *fix = &info->fix; |
1da177e4 LT |
741 | int xoffset = var->xoffset; |
742 | int yoffset = var->yoffset; | |
1207069f AD |
743 | int err = 0, yres = info->var.yres; |
744 | ||
745 | if (var->yoffset > 0) { | |
746 | if (var->vmode & FB_VMODE_YWRAP) { | |
747 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
748 | err = -EINVAL; | |
749 | else | |
750 | yres = 0; | |
751 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
752 | err = -EINVAL; | |
753 | } | |
754 | ||
755 | if (var->xoffset > 0 && (!fix->xpanstep || | |
756 | (var->xoffset % fix->xpanstep))) | |
757 | err = -EINVAL; | |
758 | ||
759 | if (err || !info->fbops->fb_pan_display || xoffset < 0 || | |
760 | yoffset < 0 || var->yoffset + yres > info->var.yres_virtual || | |
761 | var->xoffset + info->var.xres > info->var.xres_virtual) | |
762 | return -EINVAL; | |
1da177e4 | 763 | |
1da177e4 LT |
764 | if ((err = info->fbops->fb_pan_display(var, info))) |
765 | return err; | |
766 | info->var.xoffset = var->xoffset; | |
767 | info->var.yoffset = var->yoffset; | |
768 | if (var->vmode & FB_VMODE_YWRAP) | |
769 | info->var.vmode |= FB_VMODE_YWRAP; | |
770 | else | |
771 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | int | |
776 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
777 | { | |
3edea483 | 778 | int err, flags = info->flags; |
1da177e4 LT |
779 | |
780 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
781 | struct fb_videomode mode1, mode2; | |
782 | int ret = 0; | |
783 | ||
784 | fb_var_to_videomode(&mode1, var); | |
785 | fb_var_to_videomode(&mode2, &info->var); | |
786 | /* make sure we don't delete the videomode of current var */ | |
787 | ret = fb_mode_is_equal(&mode1, &mode2); | |
788 | ||
789 | if (!ret) { | |
790 | struct fb_event event; | |
791 | ||
792 | event.info = info; | |
793 | event.data = &mode1; | |
256154fb | 794 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
795 | } |
796 | ||
797 | if (!ret) | |
798 | fb_delete_videomode(&mode1, &info->modelist); | |
799 | ||
800 | return ret; | |
801 | } | |
802 | ||
803 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
804 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
805 | if (!info->fbops->fb_check_var) { | |
806 | *var = info->var; | |
807 | return 0; | |
808 | } | |
809 | ||
810 | if ((err = info->fbops->fb_check_var(var, info))) | |
811 | return err; | |
812 | ||
813 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
814 | struct fb_videomode mode; | |
815 | int err = 0; | |
816 | ||
817 | info->var = *var; | |
818 | if (info->fbops->fb_set_par) | |
819 | info->fbops->fb_set_par(info); | |
820 | ||
821 | fb_pan_display(info, &info->var); | |
822 | ||
823 | fb_set_cmap(&info->cmap, info); | |
824 | ||
825 | fb_var_to_videomode(&mode, &info->var); | |
826 | ||
827 | if (info->modelist.prev && info->modelist.next && | |
828 | !list_empty(&info->modelist)) | |
829 | err = fb_add_videomode(&mode, &info->modelist); | |
830 | ||
3edea483 | 831 | if (!err && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 832 | struct fb_event event; |
7726e9e1 AD |
833 | int evnt = (var->activate & FB_ACTIVATE_ALL) ? |
834 | FB_EVENT_MODE_CHANGE_ALL : | |
835 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
836 | |
837 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
838 | event.info = info; | |
256154fb | 839 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
840 | } |
841 | } | |
842 | } | |
843 | return 0; | |
844 | } | |
845 | ||
846 | int | |
847 | fb_blank(struct fb_info *info, int blank) | |
848 | { | |
849 | int ret = -EINVAL; | |
850 | ||
851 | if (blank > FB_BLANK_POWERDOWN) | |
852 | blank = FB_BLANK_POWERDOWN; | |
853 | ||
854 | if (info->fbops->fb_blank) | |
855 | ret = info->fbops->fb_blank(blank, info); | |
856 | ||
857 | if (!ret) { | |
858 | struct fb_event event; | |
859 | ||
860 | event.info = info; | |
861 | event.data = ␣ | |
256154fb | 862 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 LT |
863 | } |
864 | ||
865 | return ret; | |
866 | } | |
867 | ||
868 | static int | |
869 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
870 | unsigned long arg) | |
871 | { | |
872 | int fbidx = iminor(inode); | |
873 | struct fb_info *info = registered_fb[fbidx]; | |
874 | struct fb_ops *fb = info->fbops; | |
875 | struct fb_var_screeninfo var; | |
876 | struct fb_fix_screeninfo fix; | |
877 | struct fb_con2fbmap con2fb; | |
878 | struct fb_cmap_user cmap; | |
879 | struct fb_event event; | |
880 | void __user *argp = (void __user *)arg; | |
881 | int i; | |
882 | ||
883 | if (!fb) | |
884 | return -ENODEV; | |
885 | switch (cmd) { | |
886 | case FBIOGET_VSCREENINFO: | |
887 | return copy_to_user(argp, &info->var, | |
888 | sizeof(var)) ? -EFAULT : 0; | |
889 | case FBIOPUT_VSCREENINFO: | |
890 | if (copy_from_user(&var, argp, sizeof(var))) | |
891 | return -EFAULT; | |
892 | acquire_console_sem(); | |
893 | info->flags |= FBINFO_MISC_USEREVENT; | |
894 | i = fb_set_var(info, &var); | |
895 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
896 | release_console_sem(); | |
897 | if (i) return i; | |
898 | if (copy_to_user(argp, &var, sizeof(var))) | |
899 | return -EFAULT; | |
900 | return 0; | |
901 | case FBIOGET_FSCREENINFO: | |
902 | return copy_to_user(argp, &info->fix, | |
903 | sizeof(fix)) ? -EFAULT : 0; | |
904 | case FBIOPUTCMAP: | |
905 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
906 | return -EFAULT; | |
907 | return (fb_set_user_cmap(&cmap, info)); | |
908 | case FBIOGETCMAP: | |
909 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
910 | return -EFAULT; | |
911 | return fb_cmap_to_user(&info->cmap, &cmap); | |
912 | case FBIOPAN_DISPLAY: | |
913 | if (copy_from_user(&var, argp, sizeof(var))) | |
914 | return -EFAULT; | |
915 | acquire_console_sem(); | |
916 | i = fb_pan_display(info, &var); | |
917 | release_console_sem(); | |
918 | if (i) | |
919 | return i; | |
920 | if (copy_to_user(argp, &var, sizeof(var))) | |
921 | return -EFAULT; | |
922 | return 0; | |
923 | case FBIO_CURSOR: | |
924 | return -EINVAL; | |
925 | case FBIOGET_CON2FBMAP: | |
926 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
927 | return -EFAULT; | |
928 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
929 | return -EINVAL; | |
930 | con2fb.framebuffer = -1; | |
931 | event.info = info; | |
932 | event.data = &con2fb; | |
256154fb | 933 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
1da177e4 LT |
934 | return copy_to_user(argp, &con2fb, |
935 | sizeof(con2fb)) ? -EFAULT : 0; | |
936 | case FBIOPUT_CON2FBMAP: | |
937 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
938 | return - EFAULT; | |
939 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
940 | return -EINVAL; | |
941 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
942 | return -EINVAL; | |
943 | #ifdef CONFIG_KMOD | |
944 | if (!registered_fb[con2fb.framebuffer]) | |
945 | try_to_load(con2fb.framebuffer); | |
946 | #endif /* CONFIG_KMOD */ | |
947 | if (!registered_fb[con2fb.framebuffer]) | |
948 | return -EINVAL; | |
949 | event.info = info; | |
950 | event.data = &con2fb; | |
256154fb AD |
951 | return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, |
952 | &event); | |
1da177e4 LT |
953 | case FBIOBLANK: |
954 | acquire_console_sem(); | |
955 | info->flags |= FBINFO_MISC_USEREVENT; | |
956 | i = fb_blank(info, arg); | |
957 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
958 | release_console_sem(); | |
959 | return i; | |
960 | default: | |
961 | if (fb->fb_ioctl == NULL) | |
962 | return -EINVAL; | |
67a6680d | 963 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
964 | } |
965 | } | |
966 | ||
967 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
968 | struct fb_fix_screeninfo32 { |
969 | char id[16]; | |
970 | compat_caddr_t smem_start; | |
971 | u32 smem_len; | |
972 | u32 type; | |
973 | u32 type_aux; | |
974 | u32 visual; | |
975 | u16 xpanstep; | |
976 | u16 ypanstep; | |
977 | u16 ywrapstep; | |
978 | u32 line_length; | |
979 | compat_caddr_t mmio_start; | |
980 | u32 mmio_len; | |
981 | u32 accel; | |
982 | u16 reserved[3]; | |
983 | }; | |
984 | ||
985 | struct fb_cmap32 { | |
986 | u32 start; | |
987 | u32 len; | |
988 | compat_caddr_t red; | |
989 | compat_caddr_t green; | |
990 | compat_caddr_t blue; | |
991 | compat_caddr_t transp; | |
992 | }; | |
993 | ||
994 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
995 | unsigned int cmd, unsigned long arg) | |
996 | { | |
997 | struct fb_cmap_user __user *cmap; | |
998 | struct fb_cmap32 __user *cmap32; | |
999 | __u32 data; | |
1000 | int err; | |
1001 | ||
1002 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1003 | cmap32 = compat_ptr(arg); | |
1004 | ||
1005 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1006 | return -EFAULT; | |
1007 | ||
1008 | if (get_user(data, &cmap32->red) || | |
1009 | put_user(compat_ptr(data), &cmap->red) || | |
1010 | get_user(data, &cmap32->green) || | |
1011 | put_user(compat_ptr(data), &cmap->green) || | |
1012 | get_user(data, &cmap32->blue) || | |
1013 | put_user(compat_ptr(data), &cmap->blue) || | |
1014 | get_user(data, &cmap32->transp) || | |
1015 | put_user(compat_ptr(data), &cmap->transp)) | |
1016 | return -EFAULT; | |
1017 | ||
1018 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1019 | ||
1020 | if (!err) { | |
1021 | if (copy_in_user(&cmap32->start, | |
1022 | &cmap->start, | |
1023 | 2 * sizeof(__u32))) | |
1024 | err = -EFAULT; | |
1025 | } | |
1026 | return err; | |
1027 | } | |
1028 | ||
1029 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1030 | struct fb_fix_screeninfo32 __user *fix32) | |
1031 | { | |
1032 | __u32 data; | |
1033 | int err; | |
1034 | ||
1035 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1036 | ||
1037 | data = (__u32) (unsigned long) fix->smem_start; | |
1038 | err |= put_user(data, &fix32->smem_start); | |
1039 | ||
1040 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1041 | err |= put_user(fix->type, &fix32->type); | |
1042 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1043 | err |= put_user(fix->visual, &fix32->visual); | |
1044 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1045 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1046 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1047 | err |= put_user(fix->line_length, &fix32->line_length); | |
1048 | ||
1049 | data = (__u32) (unsigned long) fix->mmio_start; | |
1050 | err |= put_user(data, &fix32->mmio_start); | |
1051 | ||
1052 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1053 | err |= put_user(fix->accel, &fix32->accel); | |
1054 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1055 | sizeof(fix->reserved)); | |
1056 | ||
1057 | return err; | |
1058 | } | |
1059 | ||
1060 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1061 | unsigned int cmd, unsigned long arg) | |
1062 | { | |
1063 | mm_segment_t old_fs; | |
1064 | struct fb_fix_screeninfo fix; | |
1065 | struct fb_fix_screeninfo32 __user *fix32; | |
1066 | int err; | |
1067 | ||
1068 | fix32 = compat_ptr(arg); | |
1069 | ||
1070 | old_fs = get_fs(); | |
1071 | set_fs(KERNEL_DS); | |
1072 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1073 | set_fs(old_fs); | |
1074 | ||
1075 | if (!err) | |
1076 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1077 | ||
1078 | return err; | |
1079 | } | |
1080 | ||
1da177e4 LT |
1081 | static long |
1082 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1083 | { | |
ad9a824e | 1084 | struct inode *inode = file->f_path.dentry->d_inode; |
c7f82d9c | 1085 | int fbidx = iminor(inode); |
1da177e4 LT |
1086 | struct fb_info *info = registered_fb[fbidx]; |
1087 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1088 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1089 | |
1da177e4 | 1090 | lock_kernel(); |
c7f82d9c AB |
1091 | switch(cmd) { |
1092 | case FBIOGET_VSCREENINFO: | |
1093 | case FBIOPUT_VSCREENINFO: | |
1094 | case FBIOPAN_DISPLAY: | |
1095 | case FBIOGET_CON2FBMAP: | |
1096 | case FBIOPUT_CON2FBMAP: | |
1097 | arg = (unsigned long) compat_ptr(arg); | |
1098 | case FBIOBLANK: | |
1099 | ret = fb_ioctl(inode, file, cmd, arg); | |
1100 | break; | |
1101 | ||
1102 | case FBIOGET_FSCREENINFO: | |
1103 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1104 | break; | |
1105 | ||
1106 | case FBIOGETCMAP: | |
1107 | case FBIOPUTCMAP: | |
1108 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1109 | break; | |
1110 | ||
1111 | default: | |
1112 | if (fb->fb_compat_ioctl) | |
67a6680d | 1113 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1114 | break; |
1115 | } | |
1da177e4 LT |
1116 | unlock_kernel(); |
1117 | return ret; | |
1118 | } | |
1119 | #endif | |
1120 | ||
1121 | static int | |
1122 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
1123 | { | |
ad9a824e | 1124 | int fbidx = iminor(file->f_path.dentry->d_inode); |
1da177e4 LT |
1125 | struct fb_info *info = registered_fb[fbidx]; |
1126 | struct fb_ops *fb = info->fbops; | |
1127 | unsigned long off; | |
1128 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
1129 | unsigned long start; | |
1130 | u32 len; | |
1131 | #endif | |
1132 | ||
1133 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1134 | return -EINVAL; | |
1135 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1136 | if (!fb) | |
1137 | return -ENODEV; | |
1138 | if (fb->fb_mmap) { | |
1139 | int res; | |
1140 | lock_kernel(); | |
216d526c | 1141 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1142 | unlock_kernel(); |
1143 | return res; | |
1144 | } | |
1145 | ||
1146 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
1147 | /* Should never get here, all fb drivers should have their own | |
1148 | mmap routines */ | |
1149 | return -EINVAL; | |
1150 | #else | |
1151 | /* !sparc32... */ | |
1152 | lock_kernel(); | |
1153 | ||
1154 | /* frame buffer memory */ | |
1155 | start = info->fix.smem_start; | |
1156 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1157 | if (off >= len) { | |
1158 | /* memory mapped io */ | |
1159 | off -= len; | |
1160 | if (info->var.accel_flags) { | |
1161 | unlock_kernel(); | |
1162 | return -EINVAL; | |
1163 | } | |
1164 | start = info->fix.mmio_start; | |
1165 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1166 | } | |
1167 | unlock_kernel(); | |
1168 | start &= PAGE_MASK; | |
1169 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1170 | return -EINVAL; | |
1171 | off += start; | |
1172 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1173 | /* This is an IO map - tell maydump to skip this VMA */ | |
1174 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
1da177e4 LT |
1175 | #if defined(__mc68000__) |
1176 | #if defined(CONFIG_SUN3) | |
1177 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
1178 | #elif defined(CONFIG_MMU) | |
1179 | if (CPU_IS_020_OR_030) | |
1180 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
1181 | if (CPU_IS_040_OR_060) { | |
1182 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
1183 | /* Use no-cache mode, serialized */ | |
1184 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
1185 | } | |
1186 | #endif | |
1187 | #elif defined(__powerpc__) | |
8b150478 | 1188 | vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT, |
1da177e4 LT |
1189 | vma->vm_end - vma->vm_start, |
1190 | vma->vm_page_prot); | |
1191 | #elif defined(__alpha__) | |
1192 | /* Caching is off in the I/O space quadrant by design. */ | |
1193 | #elif defined(__i386__) || defined(__x86_64__) | |
1194 | if (boot_cpu_data.x86 > 3) | |
1195 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
14778d90 | 1196 | #elif defined(__mips__) || defined(__sparc_v9__) |
1da177e4 LT |
1197 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1198 | #elif defined(__hppa__) | |
1199 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
1200 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
1201 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1202 | #elif defined(__ia64__) | |
1203 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
1204 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1205 | else | |
1206 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1207 | #else | |
1208 | #warning What do we have to do here?? | |
1209 | #endif | |
1210 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
1211 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1212 | return -EAGAIN; | |
1da177e4 LT |
1213 | return 0; |
1214 | #endif /* !sparc32 */ | |
1215 | } | |
1216 | ||
1217 | static int | |
1218 | fb_open(struct inode *inode, struct file *file) | |
1219 | { | |
1220 | int fbidx = iminor(inode); | |
1221 | struct fb_info *info; | |
1222 | int res = 0; | |
1223 | ||
1224 | if (fbidx >= FB_MAX) | |
1225 | return -ENODEV; | |
1226 | #ifdef CONFIG_KMOD | |
1227 | if (!(info = registered_fb[fbidx])) | |
1228 | try_to_load(fbidx); | |
1229 | #endif /* CONFIG_KMOD */ | |
1230 | if (!(info = registered_fb[fbidx])) | |
1231 | return -ENODEV; | |
1232 | if (!try_module_get(info->fbops->owner)) | |
1233 | return -ENODEV; | |
cae8a12f | 1234 | file->private_data = info; |
1da177e4 LT |
1235 | if (info->fbops->fb_open) { |
1236 | res = info->fbops->fb_open(info,1); | |
1237 | if (res) | |
1238 | module_put(info->fbops->owner); | |
1239 | } | |
1240 | return res; | |
1241 | } | |
1242 | ||
1243 | static int | |
1244 | fb_release(struct inode *inode, struct file *file) | |
1245 | { | |
cae8a12f | 1246 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1247 | |
1248 | lock_kernel(); | |
1da177e4 LT |
1249 | if (info->fbops->fb_release) |
1250 | info->fbops->fb_release(info,1); | |
1251 | module_put(info->fbops->owner); | |
1252 | unlock_kernel(); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | static struct file_operations fb_fops = { | |
1257 | .owner = THIS_MODULE, | |
1258 | .read = fb_read, | |
1259 | .write = fb_write, | |
1260 | .ioctl = fb_ioctl, | |
1261 | #ifdef CONFIG_COMPAT | |
1262 | .compat_ioctl = fb_compat_ioctl, | |
1263 | #endif | |
1264 | .mmap = fb_mmap, | |
1265 | .open = fb_open, | |
1266 | .release = fb_release, | |
1267 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1268 | .get_unmapped_area = get_fb_unmapped_area, | |
1269 | #endif | |
1270 | }; | |
1271 | ||
9a179176 AD |
1272 | struct class *fb_class; |
1273 | EXPORT_SYMBOL(fb_class); | |
1da177e4 LT |
1274 | /** |
1275 | * register_framebuffer - registers a frame buffer device | |
1276 | * @fb_info: frame buffer info structure | |
1277 | * | |
1278 | * Registers a frame buffer device @fb_info. | |
1279 | * | |
1280 | * Returns negative errno on error, or zero for success. | |
1281 | * | |
1282 | */ | |
1283 | ||
1284 | int | |
1285 | register_framebuffer(struct fb_info *fb_info) | |
1286 | { | |
1287 | int i; | |
1288 | struct fb_event event; | |
96fe6a21 | 1289 | struct fb_videomode mode; |
1da177e4 LT |
1290 | |
1291 | if (num_registered_fb == FB_MAX) | |
1292 | return -ENXIO; | |
1293 | num_registered_fb++; | |
1294 | for (i = 0 ; i < FB_MAX; i++) | |
1295 | if (!registered_fb[i]) | |
1296 | break; | |
1297 | fb_info->node = i; | |
1298 | ||
78cde088 GKH |
1299 | fb_info->dev = device_create(fb_class, fb_info->device, |
1300 | MKDEV(FB_MAJOR, i), "fb%d", i); | |
1301 | if (IS_ERR(fb_info->dev)) { | |
1da177e4 | 1302 | /* Not fatal */ |
78cde088 GKH |
1303 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1304 | fb_info->dev = NULL; | |
1da177e4 | 1305 | } else |
78cde088 | 1306 | fb_init_device(fb_info); |
1da177e4 LT |
1307 | |
1308 | if (fb_info->pixmap.addr == NULL) { | |
1309 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1310 | if (fb_info->pixmap.addr) { | |
1311 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1312 | fb_info->pixmap.buf_align = 1; | |
1313 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1314 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1315 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1316 | } | |
1317 | } | |
1318 | fb_info->pixmap.offset = 0; | |
1319 | ||
96fe6a21 | 1320 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1321 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1322 | |
96fe6a21 AD |
1323 | fb_var_to_videomode(&mode, &fb_info->var); |
1324 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1325 | registered_fb[i] = fb_info; |
1326 | ||
1da177e4 | 1327 | event.info = fb_info; |
256154fb | 1328 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
1da177e4 LT |
1329 | return 0; |
1330 | } | |
1331 | ||
1332 | ||
1333 | /** | |
1334 | * unregister_framebuffer - releases a frame buffer device | |
1335 | * @fb_info: frame buffer info structure | |
1336 | * | |
1337 | * Unregisters a frame buffer device @fb_info. | |
1338 | * | |
1339 | * Returns negative errno on error, or zero for success. | |
1340 | * | |
1341 | */ | |
1342 | ||
1343 | int | |
1344 | unregister_framebuffer(struct fb_info *fb_info) | |
1345 | { | |
e614b18d | 1346 | struct fb_event event; |
1da177e4 LT |
1347 | int i; |
1348 | ||
1349 | i = fb_info->node; | |
1350 | if (!registered_fb[i]) | |
1351 | return -EINVAL; | |
1da177e4 | 1352 | |
e614b18d AD |
1353 | if (fb_info->pixmap.addr && |
1354 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1355 | kfree(fb_info->pixmap.addr); |
1356 | fb_destroy_modelist(&fb_info->modelist); | |
1357 | registered_fb[i]=NULL; | |
1358 | num_registered_fb--; | |
78cde088 GKH |
1359 | fb_cleanup_device(fb_info); |
1360 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
e614b18d | 1361 | event.info = fb_info; |
256154fb | 1362 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
1da177e4 LT |
1363 | return 0; |
1364 | } | |
1365 | ||
1da177e4 LT |
1366 | /** |
1367 | * fb_set_suspend - low level driver signals suspend | |
1368 | * @info: framebuffer affected | |
1369 | * @state: 0 = resuming, !=0 = suspending | |
1370 | * | |
1371 | * This is meant to be used by low level drivers to | |
1372 | * signal suspend/resume to the core & clients. | |
1373 | * It must be called with the console semaphore held | |
1374 | */ | |
1375 | void fb_set_suspend(struct fb_info *info, int state) | |
1376 | { | |
1377 | struct fb_event event; | |
1378 | ||
1379 | event.info = info; | |
1380 | if (state) { | |
256154fb | 1381 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1382 | info->state = FBINFO_STATE_SUSPENDED; |
1383 | } else { | |
1384 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1385 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1386 | } |
1387 | } | |
1388 | ||
1389 | /** | |
1390 | * fbmem_init - init frame buffer subsystem | |
1391 | * | |
1392 | * Initialize the frame buffer subsystem. | |
1393 | * | |
1394 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1395 | * | |
1396 | */ | |
1397 | ||
1398 | static int __init | |
1399 | fbmem_init(void) | |
1400 | { | |
1401 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1402 | ||
1da177e4 LT |
1403 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
1404 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1405 | ||
56b22935 | 1406 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1407 | if (IS_ERR(fb_class)) { |
1408 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1409 | fb_class = NULL; | |
1410 | } | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | #ifdef MODULE | |
1415 | module_init(fbmem_init); | |
1416 | static void __exit | |
1417 | fbmem_exit(void) | |
1418 | { | |
56b22935 | 1419 | class_destroy(fb_class); |
5a340cce | 1420 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | module_exit(fbmem_exit); | |
1424 | MODULE_LICENSE("GPL"); | |
1425 | MODULE_DESCRIPTION("Framebuffer base"); | |
1426 | #else | |
1427 | subsys_initcall(fbmem_init); | |
1428 | #endif | |
1429 | ||
1430 | int fb_new_modelist(struct fb_info *info) | |
1431 | { | |
1432 | struct fb_event event; | |
1433 | struct fb_var_screeninfo var = info->var; | |
1434 | struct list_head *pos, *n; | |
1435 | struct fb_modelist *modelist; | |
1436 | struct fb_videomode *m, mode; | |
1437 | int err = 1; | |
1438 | ||
1439 | list_for_each_safe(pos, n, &info->modelist) { | |
1440 | modelist = list_entry(pos, struct fb_modelist, list); | |
1441 | m = &modelist->mode; | |
1442 | fb_videomode_to_var(&var, m); | |
1443 | var.activate = FB_ACTIVATE_TEST; | |
1444 | err = fb_set_var(info, &var); | |
1445 | fb_var_to_videomode(&mode, &var); | |
1446 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1447 | list_del(pos); | |
1448 | kfree(pos); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | err = 1; | |
1453 | ||
1454 | if (!list_empty(&info->modelist)) { | |
1455 | event.info = info; | |
256154fb | 1456 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1457 | } |
1458 | ||
1459 | return err; | |
1460 | } | |
1461 | ||
1462 | static char *video_options[FB_MAX]; | |
1463 | static int ofonly; | |
1464 | ||
4dc3b16b PP |
1465 | extern const char *global_mode_option; |
1466 | ||
1da177e4 LT |
1467 | /** |
1468 | * fb_get_options - get kernel boot parameters | |
1469 | * @name: framebuffer name as it would appear in | |
1470 | * the boot parameter line | |
1471 | * (video=<name>:<options>) | |
1472 | * @option: the option will be stored here | |
1473 | * | |
1474 | * NOTE: Needed to maintain backwards compatibility | |
1475 | */ | |
1476 | int fb_get_options(char *name, char **option) | |
1477 | { | |
1478 | char *opt, *options = NULL; | |
1479 | int opt_len, retval = 0; | |
1480 | int name_len = strlen(name), i; | |
1481 | ||
1482 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1483 | retval = 1; | |
1484 | ||
1485 | if (name_len && !retval) { | |
1486 | for (i = 0; i < FB_MAX; i++) { | |
1487 | if (video_options[i] == NULL) | |
1488 | continue; | |
1489 | opt_len = strlen(video_options[i]); | |
1490 | if (!opt_len) | |
1491 | continue; | |
1492 | opt = video_options[i]; | |
1493 | if (!strncmp(name, opt, name_len) && | |
1494 | opt[name_len] == ':') | |
1495 | options = opt + name_len + 1; | |
1496 | } | |
1497 | } | |
1498 | if (options && !strncmp(options, "off", 3)) | |
1499 | retval = 1; | |
1500 | ||
1501 | if (option) | |
1502 | *option = options; | |
1503 | ||
1504 | return retval; | |
1505 | } | |
1506 | ||
bc6d7fdf | 1507 | #ifndef MODULE |
1da177e4 LT |
1508 | /** |
1509 | * video_setup - process command line options | |
1510 | * @options: string of options | |
1511 | * | |
1512 | * Process command line options for frame buffer subsystem. | |
1513 | * | |
1514 | * NOTE: This function is a __setup and __init function. | |
1515 | * It only stores the options. Drivers have to call | |
1516 | * fb_get_options() as necessary. | |
1517 | * | |
1518 | * Returns zero. | |
1519 | * | |
1520 | */ | |
75c96f85 | 1521 | static int __init video_setup(char *options) |
1da177e4 LT |
1522 | { |
1523 | int i, global = 0; | |
1524 | ||
1525 | if (!options || !*options) | |
1526 | global = 1; | |
1527 | ||
1528 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1529 | ofonly = 1; | |
1530 | global = 1; | |
1531 | } | |
1532 | ||
1533 | if (!global && !strstr(options, "fb:")) { | |
1534 | global_mode_option = options; | |
1535 | global = 1; | |
1536 | } | |
1537 | ||
1538 | if (!global) { | |
1539 | for (i = 0; i < FB_MAX; i++) { | |
1540 | if (video_options[i] == NULL) { | |
1541 | video_options[i] = options; | |
1542 | break; | |
1543 | } | |
1544 | ||
1545 | } | |
1546 | } | |
1547 | ||
9b41046c | 1548 | return 1; |
1da177e4 LT |
1549 | } |
1550 | __setup("video=", video_setup); | |
bc6d7fdf | 1551 | #endif |
1da177e4 LT |
1552 | |
1553 | /* | |
1554 | * Visible symbols for modules | |
1555 | */ | |
1556 | ||
1557 | EXPORT_SYMBOL(register_framebuffer); | |
1558 | EXPORT_SYMBOL(unregister_framebuffer); | |
1559 | EXPORT_SYMBOL(num_registered_fb); | |
1560 | EXPORT_SYMBOL(registered_fb); | |
1561 | EXPORT_SYMBOL(fb_prepare_logo); | |
1562 | EXPORT_SYMBOL(fb_show_logo); | |
1563 | EXPORT_SYMBOL(fb_set_var); | |
1564 | EXPORT_SYMBOL(fb_blank); | |
1565 | EXPORT_SYMBOL(fb_pan_display); | |
1566 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 | 1567 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 | 1568 | EXPORT_SYMBOL(fb_get_options); |
1da177e4 LT |
1569 | |
1570 | MODULE_LICENSE("GPL"); |