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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 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/module.h> | |
16 | ||
c7f82d9c | 17 | #include <linux/compat.h> |
1da177e4 LT |
18 | #include <linux/types.h> |
19 | #include <linux/errno.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/smp_lock.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/major.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/mman.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/linux_logo.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/console.h> | |
32 | #ifdef CONFIG_KMOD | |
33 | #include <linux/kmod.h> | |
34 | #endif | |
35 | #include <linux/devfs_fs_kernel.h> | |
36 | #include <linux/err.h> | |
1da177e4 LT |
37 | #include <linux/device.h> |
38 | #include <linux/efi.h> | |
39 | ||
40 | #if defined(__mc68000__) || defined(CONFIG_APUS) | |
41 | #include <asm/setup.h> | |
42 | #endif | |
43 | ||
44 | #include <asm/io.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/page.h> | |
47 | #include <asm/pgtable.h> | |
48 | ||
49 | #include <linux/fb.h> | |
50 | ||
51 | /* | |
52 | * Frame buffer device initialization and setup routines | |
53 | */ | |
54 | ||
55 | #define FBPIXMAPSIZE (1024 * 8) | |
56 | ||
e041c683 | 57 | static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); |
1da177e4 LT |
58 | struct fb_info *registered_fb[FB_MAX]; |
59 | int num_registered_fb; | |
60 | ||
61 | /* | |
62 | * Helpers | |
63 | */ | |
64 | ||
b8c90945 AD |
65 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
66 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 67 | { |
b8c90945 AD |
68 | int depth = 0; |
69 | ||
70 | if (fix->visual == FB_VISUAL_MONO01 || | |
71 | fix->visual == FB_VISUAL_MONO10) | |
72 | depth = 1; | |
73 | else { | |
74 | if (var->green.length == var->blue.length && | |
75 | var->green.length == var->red.length && | |
76 | var->green.offset == var->blue.offset && | |
77 | var->green.offset == var->red.offset) | |
78 | depth = var->green.length; | |
79 | else | |
80 | depth = var->green.length + var->red.length + | |
81 | var->blue.length; | |
82 | } | |
83 | ||
84 | return depth; | |
1da177e4 LT |
85 | } |
86 | EXPORT_SYMBOL(fb_get_color_depth); | |
87 | ||
88 | /* | |
f5a9951c | 89 | * Data padding functions. |
1da177e4 | 90 | */ |
f1ab5dac | 91 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 92 | { |
829e79b6 | 93 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 94 | } |
f1ab5dac | 95 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 96 | |
f1ab5dac JS |
97 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
98 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
99 | { |
100 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
101 | int i, j; | |
102 | ||
103 | for (i = height; i--; ) { | |
104 | for (j = 0; j < idx; j++) { | |
105 | tmp = dst[j]; | |
106 | tmp &= mask; | |
107 | tmp |= *src >> shift_low; | |
108 | dst[j] = tmp; | |
109 | tmp = *src << shift_high; | |
110 | dst[j+1] = tmp; | |
111 | src++; | |
112 | } | |
113 | tmp = dst[idx]; | |
114 | tmp &= mask; | |
115 | tmp |= *src >> shift_low; | |
116 | dst[idx] = tmp; | |
117 | if (shift_high < mod) { | |
118 | tmp = *src << shift_high; | |
119 | dst[idx+1] = tmp; | |
120 | } | |
121 | src++; | |
122 | dst += d_pitch; | |
123 | } | |
124 | } | |
f1ab5dac | 125 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
126 | |
127 | /* | |
128 | * we need to lock this section since fb_cursor | |
129 | * may use fb_imageblit() | |
130 | */ | |
131 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
132 | { | |
133 | u32 align = buf->buf_align - 1, offset; | |
134 | char *addr = buf->addr; | |
135 | ||
136 | /* If IO mapped, we need to sync before access, no sharing of | |
137 | * the pixmap is done | |
138 | */ | |
139 | if (buf->flags & FB_PIXMAP_IO) { | |
140 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
141 | info->fbops->fb_sync(info); | |
142 | return addr; | |
143 | } | |
144 | ||
145 | /* See if we fit in the remaining pixmap space */ | |
146 | offset = buf->offset + align; | |
147 | offset &= ~align; | |
148 | if (offset + size > buf->size) { | |
149 | /* We do not fit. In order to be able to re-use the buffer, | |
150 | * we must ensure no asynchronous DMA'ing or whatever operation | |
151 | * is in progress, we sync for that. | |
152 | */ | |
153 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
154 | info->fbops->fb_sync(info); | |
155 | offset = 0; | |
156 | } | |
157 | buf->offset = offset + size; | |
158 | addr += offset; | |
159 | ||
160 | return addr; | |
161 | } | |
162 | ||
163 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
164 | |
165 | static inline unsigned safe_shift(unsigned d, int n) | |
166 | { | |
167 | return n < 0 ? d >> -n : d << n; | |
168 | } | |
169 | ||
170 | static void fb_set_logocmap(struct fb_info *info, | |
171 | const struct linux_logo *logo) | |
172 | { | |
173 | struct fb_cmap palette_cmap; | |
174 | u16 palette_green[16]; | |
175 | u16 palette_blue[16]; | |
176 | u16 palette_red[16]; | |
177 | int i, j, n; | |
178 | const unsigned char *clut = logo->clut; | |
179 | ||
180 | palette_cmap.start = 0; | |
181 | palette_cmap.len = 16; | |
182 | palette_cmap.red = palette_red; | |
183 | palette_cmap.green = palette_green; | |
184 | palette_cmap.blue = palette_blue; | |
185 | palette_cmap.transp = NULL; | |
186 | ||
187 | for (i = 0; i < logo->clutsize; i += n) { | |
188 | n = logo->clutsize - i; | |
189 | /* palette_cmap provides space for only 16 colors at once */ | |
190 | if (n > 16) | |
191 | n = 16; | |
192 | palette_cmap.start = 32 + i; | |
193 | palette_cmap.len = n; | |
194 | for (j = 0; j < n; ++j) { | |
195 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
196 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
197 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
198 | clut += 3; | |
199 | } | |
200 | fb_set_cmap(&palette_cmap, info); | |
201 | } | |
202 | } | |
203 | ||
204 | static void fb_set_logo_truepalette(struct fb_info *info, | |
205 | const struct linux_logo *logo, | |
206 | u32 *palette) | |
207 | { | |
208 | unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; | |
209 | unsigned char redmask, greenmask, bluemask; | |
210 | int redshift, greenshift, blueshift; | |
211 | int i; | |
212 | const unsigned char *clut = logo->clut; | |
213 | ||
214 | /* | |
215 | * We have to create a temporary palette since console palette is only | |
216 | * 16 colors long. | |
217 | */ | |
218 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
219 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
220 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
221 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
222 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
223 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
224 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
225 | ||
226 | for ( i = 0; i < logo->clutsize; i++) { | |
227 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
228 | safe_shift((clut[1] & greenmask), greenshift) | | |
229 | safe_shift((clut[2] & bluemask), blueshift)); | |
230 | clut += 3; | |
231 | } | |
232 | } | |
233 | ||
234 | static void fb_set_logo_directpalette(struct fb_info *info, | |
235 | const struct linux_logo *logo, | |
236 | u32 *palette) | |
237 | { | |
238 | int redshift, greenshift, blueshift; | |
239 | int i; | |
240 | ||
241 | redshift = info->var.red.offset; | |
242 | greenshift = info->var.green.offset; | |
243 | blueshift = info->var.blue.offset; | |
244 | ||
245 | for (i = 32; i < logo->clutsize; i++) | |
246 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
247 | } | |
248 | ||
249 | static void fb_set_logo(struct fb_info *info, | |
250 | const struct linux_logo *logo, u8 *dst, | |
251 | int depth) | |
252 | { | |
b8c90945 | 253 | int i, j, k; |
1da177e4 | 254 | const u8 *src = logo->data; |
b8c90945 AD |
255 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
256 | u8 fg = 1, d; | |
1da177e4 | 257 | |
b8c90945 | 258 | if (fb_get_color_depth(&info->var, &info->fix) == 3) |
1da177e4 LT |
259 | fg = 7; |
260 | ||
b8c90945 AD |
261 | if (info->fix.visual == FB_VISUAL_MONO01 || |
262 | info->fix.visual == FB_VISUAL_MONO10) | |
263 | fg = ~((u8) (0xfff << info->var.green.length)); | |
264 | ||
1da177e4 LT |
265 | switch (depth) { |
266 | case 4: | |
267 | for (i = 0; i < logo->height; i++) | |
268 | for (j = 0; j < logo->width; src++) { | |
269 | *dst++ = *src >> 4; | |
270 | j++; | |
271 | if (j < logo->width) { | |
272 | *dst++ = *src & 0x0f; | |
273 | j++; | |
274 | } | |
275 | } | |
276 | break; | |
277 | case 1: | |
278 | for (i = 0; i < logo->height; i++) { | |
279 | for (j = 0; j < logo->width; src++) { | |
280 | d = *src ^ xor; | |
281 | for (k = 7; k >= 0; k--) { | |
282 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
283 | j++; | |
284 | } | |
285 | } | |
286 | } | |
287 | break; | |
288 | } | |
289 | } | |
290 | ||
291 | /* | |
292 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
293 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
294 | * the visual format and color depth of the framebuffer, the DAC, the | |
295 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
296 | * | |
297 | * Case 1 - linux_logo_clut224: | |
298 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
299 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
300 | * | |
301 | * For visuals that require color info from the pseudo_palette, we also construct | |
302 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
303 | * will be set. | |
304 | * | |
305 | * Case 2 - linux_logo_vga16: | |
306 | * The number of colors just matches the console colors, thus there is no need | |
307 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
308 | * each byte contains color information for two pixels (upper and lower nibble). | |
309 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
310 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
311 | * | |
312 | * Case 3 - linux_logo_mono: | |
313 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
314 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
315 | * be set to 1. | |
316 | */ | |
317 | static struct logo_data { | |
318 | int depth; | |
319 | int needs_directpalette; | |
320 | int needs_truepalette; | |
321 | int needs_cmapreset; | |
322 | const struct linux_logo *logo; | |
323 | } fb_logo; | |
324 | ||
9c44e5f6 AD |
325 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
326 | { | |
327 | u32 size = width * height, i; | |
328 | ||
329 | out += size - 1; | |
330 | ||
331 | for (i = size; i--; ) | |
332 | *out-- = *in++; | |
333 | } | |
334 | ||
335 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
336 | { | |
337 | int i, j, w = width - 1; | |
338 | ||
339 | for (i = 0; i < height; i++) | |
340 | for (j = 0; j < width; j++) | |
341 | out[height * j + w - i] = *in++; | |
342 | } | |
343 | ||
344 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
345 | { | |
346 | int i, j, w = width - 1; | |
347 | ||
348 | for (i = 0; i < height; i++) | |
349 | for (j = 0; j < width; j++) | |
350 | out[height * (w - j) + i] = *in++; | |
351 | } | |
352 | ||
353 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
354 | struct fb_image *image, int rotate) | |
355 | { | |
356 | u32 tmp; | |
357 | ||
358 | if (rotate == FB_ROTATE_UD) { | |
359 | image->dx = info->var.xres - image->width; | |
360 | image->dy = info->var.yres - image->height; | |
361 | fb_rotate_logo_ud(image->data, dst, image->width, | |
362 | image->height); | |
363 | } else if (rotate == FB_ROTATE_CW) { | |
364 | tmp = image->width; | |
365 | image->width = image->height; | |
366 | image->height = tmp; | |
367 | image->dx = info->var.xres - image->height; | |
368 | fb_rotate_logo_cw(image->data, dst, image->width, | |
369 | image->height); | |
370 | } else if (rotate == FB_ROTATE_CCW) { | |
371 | tmp = image->width; | |
372 | image->width = image->height; | |
373 | image->height = tmp; | |
374 | image->dy = info->var.yres - image->width; | |
375 | fb_rotate_logo_ccw(image->data, dst, image->width, | |
376 | image->height); | |
377 | } | |
378 | ||
379 | image->data = dst; | |
380 | } | |
381 | ||
382 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
383 | int rotate) | |
384 | { | |
385 | int x; | |
386 | ||
387 | if (rotate == FB_ROTATE_UR) { | |
388 | for (x = 0; x < num_online_cpus() && | |
389 | x * (fb_logo.logo->width + 8) <= | |
390 | info->var.xres - fb_logo.logo->width; x++) { | |
391 | info->fbops->fb_imageblit(info, image); | |
392 | image->dx += fb_logo.logo->width + 8; | |
393 | } | |
394 | } else if (rotate == FB_ROTATE_UD) { | |
395 | for (x = 0; x < num_online_cpus() && | |
396 | x * (fb_logo.logo->width + 8) <= | |
397 | info->var.xres - fb_logo.logo->width; x++) { | |
398 | info->fbops->fb_imageblit(info, image); | |
399 | image->dx -= fb_logo.logo->width + 8; | |
400 | } | |
401 | } else if (rotate == FB_ROTATE_CW) { | |
402 | for (x = 0; x < num_online_cpus() && | |
403 | x * (fb_logo.logo->width + 8) <= | |
404 | info->var.yres - fb_logo.logo->width; x++) { | |
405 | info->fbops->fb_imageblit(info, image); | |
406 | image->dy += fb_logo.logo->width + 8; | |
407 | } | |
408 | } else if (rotate == FB_ROTATE_CCW) { | |
409 | for (x = 0; x < num_online_cpus() && | |
410 | x * (fb_logo.logo->width + 8) <= | |
411 | info->var.yres - fb_logo.logo->width; x++) { | |
412 | info->fbops->fb_imageblit(info, image); | |
413 | image->dy -= fb_logo.logo->width + 8; | |
414 | } | |
415 | } | |
416 | } | |
417 | ||
418 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
1da177e4 | 419 | { |
b8c90945 | 420 | int depth = fb_get_color_depth(&info->var, &info->fix); |
9c44e5f6 | 421 | int yres; |
1da177e4 LT |
422 | |
423 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
424 | ||
425 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
426 | return 0; | |
427 | ||
428 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
429 | depth = info->var.blue.length; | |
430 | if (info->var.red.length < depth) | |
431 | depth = info->var.red.length; | |
432 | if (info->var.green.length < depth) | |
433 | depth = info->var.green.length; | |
434 | } | |
435 | ||
0c683dbf | 436 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
397eeab3 AD |
437 | /* assume console colormap */ |
438 | depth = 4; | |
439 | } | |
440 | ||
1da177e4 LT |
441 | if (depth >= 8) { |
442 | switch (info->fix.visual) { | |
443 | case FB_VISUAL_TRUECOLOR: | |
444 | fb_logo.needs_truepalette = 1; | |
445 | break; | |
446 | case FB_VISUAL_DIRECTCOLOR: | |
447 | fb_logo.needs_directpalette = 1; | |
448 | fb_logo.needs_cmapreset = 1; | |
449 | break; | |
450 | case FB_VISUAL_PSEUDOCOLOR: | |
451 | fb_logo.needs_cmapreset = 1; | |
452 | break; | |
453 | } | |
454 | } | |
455 | ||
456 | /* Return if no suitable logo was found */ | |
457 | fb_logo.logo = fb_find_logo(depth); | |
6d9885a8 JS |
458 | |
459 | if (!fb_logo.logo) { | |
460 | return 0; | |
461 | } | |
1da177e4 | 462 | |
9c44e5f6 AD |
463 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
464 | yres = info->var.yres; | |
465 | else | |
466 | yres = info->var.xres; | |
467 | ||
6d9885a8 | 468 | if (fb_logo.logo->height > yres) { |
1da177e4 LT |
469 | fb_logo.logo = NULL; |
470 | return 0; | |
471 | } | |
9c44e5f6 | 472 | |
1da177e4 LT |
473 | /* What depth we asked for might be different from what we get */ |
474 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
475 | fb_logo.depth = 8; | |
476 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
477 | fb_logo.depth = 4; | |
478 | else | |
479 | fb_logo.depth = 1; | |
480 | return fb_logo.logo->height; | |
481 | } | |
482 | ||
9c44e5f6 | 483 | int fb_show_logo(struct fb_info *info, int rotate) |
1da177e4 LT |
484 | { |
485 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 486 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 487 | struct fb_image image; |
1da177e4 LT |
488 | |
489 | /* Return if the frame buffer is not mapped or suspended */ | |
490 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
491 | return 0; | |
492 | ||
493 | image.depth = 8; | |
494 | image.data = fb_logo.logo->data; | |
495 | ||
496 | if (fb_logo.needs_cmapreset) | |
497 | fb_set_logocmap(info, fb_logo.logo); | |
498 | ||
499 | if (fb_logo.needs_truepalette || | |
500 | fb_logo.needs_directpalette) { | |
501 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
502 | if (palette == NULL) | |
503 | return 0; | |
504 | ||
505 | if (fb_logo.needs_truepalette) | |
506 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
507 | else | |
508 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
509 | ||
510 | saved_pseudo_palette = info->pseudo_palette; | |
511 | info->pseudo_palette = palette; | |
512 | } | |
513 | ||
514 | if (fb_logo.depth <= 4) { | |
515 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
516 | GFP_KERNEL); | |
517 | if (logo_new == NULL) { | |
518 | kfree(palette); | |
519 | if (saved_pseudo_palette) | |
520 | info->pseudo_palette = saved_pseudo_palette; | |
521 | return 0; | |
522 | } | |
523 | image.data = logo_new; | |
524 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
525 | } | |
526 | ||
9c44e5f6 AD |
527 | image.dx = 0; |
528 | image.dy = 0; | |
1da177e4 LT |
529 | image.width = fb_logo.logo->width; |
530 | image.height = fb_logo.logo->height; | |
1da177e4 | 531 | |
9c44e5f6 AD |
532 | if (rotate) { |
533 | logo_rotate = kmalloc(fb_logo.logo->width * | |
534 | fb_logo.logo->height, GFP_KERNEL); | |
535 | if (logo_rotate) | |
536 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 537 | } |
9c44e5f6 AD |
538 | |
539 | fb_do_show_logo(info, &image, rotate); | |
540 | ||
1da177e4 LT |
541 | kfree(palette); |
542 | if (saved_pseudo_palette != NULL) | |
543 | info->pseudo_palette = saved_pseudo_palette; | |
544 | kfree(logo_new); | |
9c44e5f6 | 545 | kfree(logo_rotate); |
1da177e4 LT |
546 | return fb_logo.logo->height; |
547 | } | |
548 | #else | |
9c44e5f6 AD |
549 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
550 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
551 | #endif /* CONFIG_LOGO */ |
552 | ||
553 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
554 | int len, int *eof, void *private) | |
555 | { | |
556 | struct fb_info **fi; | |
557 | int clen; | |
558 | ||
559 | clen = 0; | |
560 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++) | |
561 | if (*fi) | |
562 | clen += sprintf(buf + clen, "%d %s\n", | |
563 | (*fi)->node, | |
564 | (*fi)->fix.id); | |
565 | *start = buf + offset; | |
566 | if (clen > offset) | |
567 | clen -= offset; | |
568 | else | |
569 | clen = 0; | |
570 | return clen < len ? clen : len; | |
571 | } | |
572 | ||
573 | static ssize_t | |
574 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
575 | { | |
576 | unsigned long p = *ppos; | |
577 | struct inode *inode = file->f_dentry->d_inode; | |
578 | int fbidx = iminor(inode); | |
579 | struct fb_info *info = registered_fb[fbidx]; | |
580 | u32 *buffer, *dst; | |
581 | u32 __iomem *src; | |
582 | int c, i, cnt = 0, err = 0; | |
583 | unsigned long total_size; | |
584 | ||
585 | if (!info || ! info->screen_base) | |
586 | return -ENODEV; | |
587 | ||
588 | if (info->state != FBINFO_STATE_RUNNING) | |
589 | return -EPERM; | |
590 | ||
591 | if (info->fbops->fb_read) | |
592 | return info->fbops->fb_read(file, buf, count, ppos); | |
593 | ||
594 | total_size = info->screen_size; | |
0a484a3a | 595 | |
1da177e4 LT |
596 | if (total_size == 0) |
597 | total_size = info->fix.smem_len; | |
598 | ||
599 | if (p >= total_size) | |
0a484a3a AD |
600 | return 0; |
601 | ||
1da177e4 | 602 | if (count >= total_size) |
0a484a3a AD |
603 | count = total_size; |
604 | ||
1da177e4 LT |
605 | if (count + p > total_size) |
606 | count = total_size - p; | |
607 | ||
1da177e4 LT |
608 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
609 | GFP_KERNEL); | |
610 | if (!buffer) | |
611 | return -ENOMEM; | |
612 | ||
613 | src = (u32 __iomem *) (info->screen_base + p); | |
614 | ||
615 | if (info->fbops->fb_sync) | |
616 | info->fbops->fb_sync(info); | |
617 | ||
618 | while (count) { | |
619 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
620 | dst = buffer; | |
621 | for (i = c >> 2; i--; ) | |
622 | *dst++ = fb_readl(src++); | |
623 | if (c & 3) { | |
624 | u8 *dst8 = (u8 *) dst; | |
625 | u8 __iomem *src8 = (u8 __iomem *) src; | |
626 | ||
627 | for (i = c & 3; i--;) | |
628 | *dst8++ = fb_readb(src8++); | |
629 | ||
630 | src = (u32 __iomem *) src8; | |
631 | } | |
632 | ||
633 | if (copy_to_user(buf, buffer, c)) { | |
634 | err = -EFAULT; | |
635 | break; | |
636 | } | |
637 | *ppos += c; | |
638 | buf += c; | |
639 | cnt += c; | |
640 | count -= c; | |
641 | } | |
642 | ||
643 | kfree(buffer); | |
0a484a3a | 644 | |
1da177e4 LT |
645 | return (err) ? err : cnt; |
646 | } | |
647 | ||
648 | static ssize_t | |
649 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
650 | { | |
651 | unsigned long p = *ppos; | |
652 | struct inode *inode = file->f_dentry->d_inode; | |
653 | int fbidx = iminor(inode); | |
654 | struct fb_info *info = registered_fb[fbidx]; | |
655 | u32 *buffer, *src; | |
656 | u32 __iomem *dst; | |
0a484a3a | 657 | int c, i, cnt = 0, err = 0; |
1da177e4 LT |
658 | unsigned long total_size; |
659 | ||
660 | if (!info || !info->screen_base) | |
661 | return -ENODEV; | |
662 | ||
663 | if (info->state != FBINFO_STATE_RUNNING) | |
664 | return -EPERM; | |
665 | ||
666 | if (info->fbops->fb_write) | |
667 | return info->fbops->fb_write(file, buf, count, ppos); | |
668 | ||
669 | total_size = info->screen_size; | |
0a484a3a | 670 | |
1da177e4 LT |
671 | if (total_size == 0) |
672 | total_size = info->fix.smem_len; | |
673 | ||
674 | if (p > total_size) | |
6a2a8866 | 675 | return -EFBIG; |
0a484a3a | 676 | |
6a2a8866 AD |
677 | if (count > total_size) { |
678 | err = -EFBIG; | |
0a484a3a | 679 | count = total_size; |
6a2a8866 AD |
680 | } |
681 | ||
682 | if (count + p > total_size) { | |
683 | if (!err) | |
684 | err = -ENOSPC; | |
0a484a3a | 685 | |
0a484a3a | 686 | count = total_size - p; |
6a2a8866 | 687 | } |
0a484a3a | 688 | |
1da177e4 LT |
689 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
690 | GFP_KERNEL); | |
691 | if (!buffer) | |
692 | return -ENOMEM; | |
693 | ||
694 | dst = (u32 __iomem *) (info->screen_base + p); | |
695 | ||
696 | if (info->fbops->fb_sync) | |
697 | info->fbops->fb_sync(info); | |
698 | ||
699 | while (count) { | |
700 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
701 | src = buffer; | |
0a484a3a | 702 | |
1da177e4 LT |
703 | if (copy_from_user(src, buf, c)) { |
704 | err = -EFAULT; | |
705 | break; | |
706 | } | |
0a484a3a | 707 | |
1da177e4 LT |
708 | for (i = c >> 2; i--; ) |
709 | fb_writel(*src++, dst++); | |
0a484a3a | 710 | |
1da177e4 LT |
711 | if (c & 3) { |
712 | u8 *src8 = (u8 *) src; | |
713 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
714 | ||
715 | for (i = c & 3; i--; ) | |
716 | fb_writeb(*src8++, dst8++); | |
717 | ||
718 | dst = (u32 __iomem *) dst8; | |
719 | } | |
0a484a3a | 720 | |
1da177e4 LT |
721 | *ppos += c; |
722 | buf += c; | |
723 | cnt += c; | |
724 | count -= c; | |
725 | } | |
0a484a3a | 726 | |
1da177e4 LT |
727 | kfree(buffer); |
728 | ||
6a2a8866 | 729 | return (cnt) ? cnt : err; |
1da177e4 LT |
730 | } |
731 | ||
732 | #ifdef CONFIG_KMOD | |
733 | static void try_to_load(int fb) | |
734 | { | |
735 | request_module("fb%d", fb); | |
736 | } | |
737 | #endif /* CONFIG_KMOD */ | |
738 | ||
739 | int | |
740 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
741 | { | |
1207069f | 742 | struct fb_fix_screeninfo *fix = &info->fix; |
1da177e4 LT |
743 | int xoffset = var->xoffset; |
744 | int yoffset = var->yoffset; | |
1207069f AD |
745 | int err = 0, yres = info->var.yres; |
746 | ||
747 | if (var->yoffset > 0) { | |
748 | if (var->vmode & FB_VMODE_YWRAP) { | |
749 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
750 | err = -EINVAL; | |
751 | else | |
752 | yres = 0; | |
753 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
754 | err = -EINVAL; | |
755 | } | |
756 | ||
757 | if (var->xoffset > 0 && (!fix->xpanstep || | |
758 | (var->xoffset % fix->xpanstep))) | |
759 | err = -EINVAL; | |
760 | ||
761 | if (err || !info->fbops->fb_pan_display || xoffset < 0 || | |
762 | yoffset < 0 || var->yoffset + yres > info->var.yres_virtual || | |
763 | var->xoffset + info->var.xres > info->var.xres_virtual) | |
764 | return -EINVAL; | |
1da177e4 | 765 | |
1da177e4 LT |
766 | if ((err = info->fbops->fb_pan_display(var, info))) |
767 | return err; | |
768 | info->var.xoffset = var->xoffset; | |
769 | info->var.yoffset = var->yoffset; | |
770 | if (var->vmode & FB_VMODE_YWRAP) | |
771 | info->var.vmode |= FB_VMODE_YWRAP; | |
772 | else | |
773 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
774 | return 0; | |
775 | } | |
776 | ||
777 | int | |
778 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
779 | { | |
3edea483 | 780 | int err, flags = info->flags; |
1da177e4 LT |
781 | |
782 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
783 | struct fb_videomode mode1, mode2; | |
784 | int ret = 0; | |
785 | ||
786 | fb_var_to_videomode(&mode1, var); | |
787 | fb_var_to_videomode(&mode2, &info->var); | |
788 | /* make sure we don't delete the videomode of current var */ | |
789 | ret = fb_mode_is_equal(&mode1, &mode2); | |
790 | ||
791 | if (!ret) { | |
792 | struct fb_event event; | |
793 | ||
794 | event.info = info; | |
795 | event.data = &mode1; | |
e041c683 | 796 | ret = blocking_notifier_call_chain(&fb_notifier_list, |
1da177e4 LT |
797 | FB_EVENT_MODE_DELETE, &event); |
798 | } | |
799 | ||
800 | if (!ret) | |
801 | fb_delete_videomode(&mode1, &info->modelist); | |
802 | ||
803 | return ret; | |
804 | } | |
805 | ||
806 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
807 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
808 | if (!info->fbops->fb_check_var) { | |
809 | *var = info->var; | |
810 | return 0; | |
811 | } | |
812 | ||
813 | if ((err = info->fbops->fb_check_var(var, info))) | |
814 | return err; | |
815 | ||
816 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
817 | struct fb_videomode mode; | |
818 | int err = 0; | |
819 | ||
820 | info->var = *var; | |
821 | if (info->fbops->fb_set_par) | |
822 | info->fbops->fb_set_par(info); | |
823 | ||
824 | fb_pan_display(info, &info->var); | |
825 | ||
826 | fb_set_cmap(&info->cmap, info); | |
827 | ||
828 | fb_var_to_videomode(&mode, &info->var); | |
829 | ||
830 | if (info->modelist.prev && info->modelist.next && | |
831 | !list_empty(&info->modelist)) | |
832 | err = fb_add_videomode(&mode, &info->modelist); | |
833 | ||
3edea483 | 834 | if (!err && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 835 | struct fb_event event; |
7726e9e1 AD |
836 | int evnt = (var->activate & FB_ACTIVATE_ALL) ? |
837 | FB_EVENT_MODE_CHANGE_ALL : | |
838 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
839 | |
840 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
841 | event.info = info; | |
e041c683 AS |
842 | blocking_notifier_call_chain(&fb_notifier_list, |
843 | evnt, &event); | |
1da177e4 LT |
844 | } |
845 | } | |
846 | } | |
847 | return 0; | |
848 | } | |
849 | ||
850 | int | |
851 | fb_blank(struct fb_info *info, int blank) | |
852 | { | |
853 | int ret = -EINVAL; | |
854 | ||
855 | if (blank > FB_BLANK_POWERDOWN) | |
856 | blank = FB_BLANK_POWERDOWN; | |
857 | ||
858 | if (info->fbops->fb_blank) | |
859 | ret = info->fbops->fb_blank(blank, info); | |
860 | ||
861 | if (!ret) { | |
862 | struct fb_event event; | |
863 | ||
864 | event.info = info; | |
865 | event.data = ␣ | |
e041c683 AS |
866 | blocking_notifier_call_chain(&fb_notifier_list, |
867 | FB_EVENT_BLANK, &event); | |
1da177e4 LT |
868 | } |
869 | ||
870 | return ret; | |
871 | } | |
872 | ||
873 | static int | |
874 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
875 | unsigned long arg) | |
876 | { | |
877 | int fbidx = iminor(inode); | |
878 | struct fb_info *info = registered_fb[fbidx]; | |
879 | struct fb_ops *fb = info->fbops; | |
880 | struct fb_var_screeninfo var; | |
881 | struct fb_fix_screeninfo fix; | |
882 | struct fb_con2fbmap con2fb; | |
883 | struct fb_cmap_user cmap; | |
884 | struct fb_event event; | |
885 | void __user *argp = (void __user *)arg; | |
886 | int i; | |
887 | ||
888 | if (!fb) | |
889 | return -ENODEV; | |
890 | switch (cmd) { | |
891 | case FBIOGET_VSCREENINFO: | |
892 | return copy_to_user(argp, &info->var, | |
893 | sizeof(var)) ? -EFAULT : 0; | |
894 | case FBIOPUT_VSCREENINFO: | |
895 | if (copy_from_user(&var, argp, sizeof(var))) | |
896 | return -EFAULT; | |
897 | acquire_console_sem(); | |
898 | info->flags |= FBINFO_MISC_USEREVENT; | |
899 | i = fb_set_var(info, &var); | |
900 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
901 | release_console_sem(); | |
902 | if (i) return i; | |
903 | if (copy_to_user(argp, &var, sizeof(var))) | |
904 | return -EFAULT; | |
905 | return 0; | |
906 | case FBIOGET_FSCREENINFO: | |
907 | return copy_to_user(argp, &info->fix, | |
908 | sizeof(fix)) ? -EFAULT : 0; | |
909 | case FBIOPUTCMAP: | |
910 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
911 | return -EFAULT; | |
912 | return (fb_set_user_cmap(&cmap, info)); | |
913 | case FBIOGETCMAP: | |
914 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
915 | return -EFAULT; | |
916 | return fb_cmap_to_user(&info->cmap, &cmap); | |
917 | case FBIOPAN_DISPLAY: | |
918 | if (copy_from_user(&var, argp, sizeof(var))) | |
919 | return -EFAULT; | |
920 | acquire_console_sem(); | |
921 | i = fb_pan_display(info, &var); | |
922 | release_console_sem(); | |
923 | if (i) | |
924 | return i; | |
925 | if (copy_to_user(argp, &var, sizeof(var))) | |
926 | return -EFAULT; | |
927 | return 0; | |
928 | case FBIO_CURSOR: | |
929 | return -EINVAL; | |
930 | case FBIOGET_CON2FBMAP: | |
931 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
932 | return -EFAULT; | |
933 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
934 | return -EINVAL; | |
935 | con2fb.framebuffer = -1; | |
936 | event.info = info; | |
937 | event.data = &con2fb; | |
e041c683 | 938 | blocking_notifier_call_chain(&fb_notifier_list, |
1da177e4 LT |
939 | FB_EVENT_GET_CONSOLE_MAP, &event); |
940 | return copy_to_user(argp, &con2fb, | |
941 | sizeof(con2fb)) ? -EFAULT : 0; | |
942 | case FBIOPUT_CON2FBMAP: | |
943 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
944 | return - EFAULT; | |
945 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
946 | return -EINVAL; | |
947 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
948 | return -EINVAL; | |
949 | #ifdef CONFIG_KMOD | |
950 | if (!registered_fb[con2fb.framebuffer]) | |
951 | try_to_load(con2fb.framebuffer); | |
952 | #endif /* CONFIG_KMOD */ | |
953 | if (!registered_fb[con2fb.framebuffer]) | |
954 | return -EINVAL; | |
955 | event.info = info; | |
956 | event.data = &con2fb; | |
e041c683 | 957 | return blocking_notifier_call_chain(&fb_notifier_list, |
1da177e4 LT |
958 | FB_EVENT_SET_CONSOLE_MAP, |
959 | &event); | |
960 | case FBIOBLANK: | |
961 | acquire_console_sem(); | |
962 | info->flags |= FBINFO_MISC_USEREVENT; | |
963 | i = fb_blank(info, arg); | |
964 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
965 | release_console_sem(); | |
966 | return i; | |
967 | default: | |
968 | if (fb->fb_ioctl == NULL) | |
969 | return -EINVAL; | |
67a6680d | 970 | return fb->fb_ioctl(info, cmd, arg); |
1da177e4 LT |
971 | } |
972 | } | |
973 | ||
974 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
975 | struct fb_fix_screeninfo32 { |
976 | char id[16]; | |
977 | compat_caddr_t smem_start; | |
978 | u32 smem_len; | |
979 | u32 type; | |
980 | u32 type_aux; | |
981 | u32 visual; | |
982 | u16 xpanstep; | |
983 | u16 ypanstep; | |
984 | u16 ywrapstep; | |
985 | u32 line_length; | |
986 | compat_caddr_t mmio_start; | |
987 | u32 mmio_len; | |
988 | u32 accel; | |
989 | u16 reserved[3]; | |
990 | }; | |
991 | ||
992 | struct fb_cmap32 { | |
993 | u32 start; | |
994 | u32 len; | |
995 | compat_caddr_t red; | |
996 | compat_caddr_t green; | |
997 | compat_caddr_t blue; | |
998 | compat_caddr_t transp; | |
999 | }; | |
1000 | ||
1001 | static int fb_getput_cmap(struct inode *inode, struct file *file, | |
1002 | unsigned int cmd, unsigned long arg) | |
1003 | { | |
1004 | struct fb_cmap_user __user *cmap; | |
1005 | struct fb_cmap32 __user *cmap32; | |
1006 | __u32 data; | |
1007 | int err; | |
1008 | ||
1009 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1010 | cmap32 = compat_ptr(arg); | |
1011 | ||
1012 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1013 | return -EFAULT; | |
1014 | ||
1015 | if (get_user(data, &cmap32->red) || | |
1016 | put_user(compat_ptr(data), &cmap->red) || | |
1017 | get_user(data, &cmap32->green) || | |
1018 | put_user(compat_ptr(data), &cmap->green) || | |
1019 | get_user(data, &cmap32->blue) || | |
1020 | put_user(compat_ptr(data), &cmap->blue) || | |
1021 | get_user(data, &cmap32->transp) || | |
1022 | put_user(compat_ptr(data), &cmap->transp)) | |
1023 | return -EFAULT; | |
1024 | ||
1025 | err = fb_ioctl(inode, file, cmd, (unsigned long) cmap); | |
1026 | ||
1027 | if (!err) { | |
1028 | if (copy_in_user(&cmap32->start, | |
1029 | &cmap->start, | |
1030 | 2 * sizeof(__u32))) | |
1031 | err = -EFAULT; | |
1032 | } | |
1033 | return err; | |
1034 | } | |
1035 | ||
1036 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1037 | struct fb_fix_screeninfo32 __user *fix32) | |
1038 | { | |
1039 | __u32 data; | |
1040 | int err; | |
1041 | ||
1042 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1043 | ||
1044 | data = (__u32) (unsigned long) fix->smem_start; | |
1045 | err |= put_user(data, &fix32->smem_start); | |
1046 | ||
1047 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1048 | err |= put_user(fix->type, &fix32->type); | |
1049 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1050 | err |= put_user(fix->visual, &fix32->visual); | |
1051 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1052 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1053 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1054 | err |= put_user(fix->line_length, &fix32->line_length); | |
1055 | ||
1056 | data = (__u32) (unsigned long) fix->mmio_start; | |
1057 | err |= put_user(data, &fix32->mmio_start); | |
1058 | ||
1059 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1060 | err |= put_user(fix->accel, &fix32->accel); | |
1061 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1062 | sizeof(fix->reserved)); | |
1063 | ||
1064 | return err; | |
1065 | } | |
1066 | ||
1067 | static int fb_get_fscreeninfo(struct inode *inode, struct file *file, | |
1068 | unsigned int cmd, unsigned long arg) | |
1069 | { | |
1070 | mm_segment_t old_fs; | |
1071 | struct fb_fix_screeninfo fix; | |
1072 | struct fb_fix_screeninfo32 __user *fix32; | |
1073 | int err; | |
1074 | ||
1075 | fix32 = compat_ptr(arg); | |
1076 | ||
1077 | old_fs = get_fs(); | |
1078 | set_fs(KERNEL_DS); | |
1079 | err = fb_ioctl(inode, file, cmd, (unsigned long) &fix); | |
1080 | set_fs(old_fs); | |
1081 | ||
1082 | if (!err) | |
1083 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1084 | ||
1085 | return err; | |
1086 | } | |
1087 | ||
1da177e4 LT |
1088 | static long |
1089 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1090 | { | |
c7f82d9c AB |
1091 | struct inode *inode = file->f_dentry->d_inode; |
1092 | int fbidx = iminor(inode); | |
1da177e4 LT |
1093 | struct fb_info *info = registered_fb[fbidx]; |
1094 | struct fb_ops *fb = info->fbops; | |
c7f82d9c | 1095 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1096 | |
1da177e4 | 1097 | lock_kernel(); |
c7f82d9c AB |
1098 | switch(cmd) { |
1099 | case FBIOGET_VSCREENINFO: | |
1100 | case FBIOPUT_VSCREENINFO: | |
1101 | case FBIOPAN_DISPLAY: | |
1102 | case FBIOGET_CON2FBMAP: | |
1103 | case FBIOPUT_CON2FBMAP: | |
1104 | arg = (unsigned long) compat_ptr(arg); | |
1105 | case FBIOBLANK: | |
1106 | ret = fb_ioctl(inode, file, cmd, arg); | |
1107 | break; | |
1108 | ||
1109 | case FBIOGET_FSCREENINFO: | |
1110 | ret = fb_get_fscreeninfo(inode, file, cmd, arg); | |
1111 | break; | |
1112 | ||
1113 | case FBIOGETCMAP: | |
1114 | case FBIOPUTCMAP: | |
1115 | ret = fb_getput_cmap(inode, file, cmd, arg); | |
1116 | break; | |
1117 | ||
1118 | default: | |
1119 | if (fb->fb_compat_ioctl) | |
67a6680d | 1120 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1121 | break; |
1122 | } | |
1da177e4 LT |
1123 | unlock_kernel(); |
1124 | return ret; | |
1125 | } | |
1126 | #endif | |
1127 | ||
1128 | static int | |
1129 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
1130 | { | |
1131 | int fbidx = iminor(file->f_dentry->d_inode); | |
1132 | struct fb_info *info = registered_fb[fbidx]; | |
1133 | struct fb_ops *fb = info->fbops; | |
1134 | unsigned long off; | |
1135 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
1136 | unsigned long start; | |
1137 | u32 len; | |
1138 | #endif | |
1139 | ||
1140 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
1141 | return -EINVAL; | |
1142 | off = vma->vm_pgoff << PAGE_SHIFT; | |
1143 | if (!fb) | |
1144 | return -ENODEV; | |
1145 | if (fb->fb_mmap) { | |
1146 | int res; | |
1147 | lock_kernel(); | |
216d526c | 1148 | res = fb->fb_mmap(info, vma); |
1da177e4 LT |
1149 | unlock_kernel(); |
1150 | return res; | |
1151 | } | |
1152 | ||
1153 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
1154 | /* Should never get here, all fb drivers should have their own | |
1155 | mmap routines */ | |
1156 | return -EINVAL; | |
1157 | #else | |
1158 | /* !sparc32... */ | |
1159 | lock_kernel(); | |
1160 | ||
1161 | /* frame buffer memory */ | |
1162 | start = info->fix.smem_start; | |
1163 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
1164 | if (off >= len) { | |
1165 | /* memory mapped io */ | |
1166 | off -= len; | |
1167 | if (info->var.accel_flags) { | |
1168 | unlock_kernel(); | |
1169 | return -EINVAL; | |
1170 | } | |
1171 | start = info->fix.mmio_start; | |
1172 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
1173 | } | |
1174 | unlock_kernel(); | |
1175 | start &= PAGE_MASK; | |
1176 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1177 | return -EINVAL; | |
1178 | off += start; | |
1179 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1180 | /* This is an IO map - tell maydump to skip this VMA */ | |
1181 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
1da177e4 LT |
1182 | #if defined(__mc68000__) |
1183 | #if defined(CONFIG_SUN3) | |
1184 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
1185 | #elif defined(CONFIG_MMU) | |
1186 | if (CPU_IS_020_OR_030) | |
1187 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
1188 | if (CPU_IS_040_OR_060) { | |
1189 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
1190 | /* Use no-cache mode, serialized */ | |
1191 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
1192 | } | |
1193 | #endif | |
1194 | #elif defined(__powerpc__) | |
8b150478 | 1195 | vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT, |
1da177e4 LT |
1196 | vma->vm_end - vma->vm_start, |
1197 | vma->vm_page_prot); | |
1198 | #elif defined(__alpha__) | |
1199 | /* Caching is off in the I/O space quadrant by design. */ | |
1200 | #elif defined(__i386__) || defined(__x86_64__) | |
1201 | if (boot_cpu_data.x86 > 3) | |
1202 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
14778d90 | 1203 | #elif defined(__mips__) || defined(__sparc_v9__) |
1da177e4 LT |
1204 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1205 | #elif defined(__hppa__) | |
1206 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
1207 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
1208 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1209 | #elif defined(__ia64__) | |
1210 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
1211 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1212 | else | |
1213 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1214 | #else | |
1215 | #warning What do we have to do here?? | |
1216 | #endif | |
1217 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
1218 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1219 | return -EAGAIN; | |
1da177e4 LT |
1220 | return 0; |
1221 | #endif /* !sparc32 */ | |
1222 | } | |
1223 | ||
1224 | static int | |
1225 | fb_open(struct inode *inode, struct file *file) | |
1226 | { | |
1227 | int fbidx = iminor(inode); | |
1228 | struct fb_info *info; | |
1229 | int res = 0; | |
1230 | ||
1231 | if (fbidx >= FB_MAX) | |
1232 | return -ENODEV; | |
1233 | #ifdef CONFIG_KMOD | |
1234 | if (!(info = registered_fb[fbidx])) | |
1235 | try_to_load(fbidx); | |
1236 | #endif /* CONFIG_KMOD */ | |
1237 | if (!(info = registered_fb[fbidx])) | |
1238 | return -ENODEV; | |
1239 | if (!try_module_get(info->fbops->owner)) | |
1240 | return -ENODEV; | |
cae8a12f | 1241 | file->private_data = info; |
1da177e4 LT |
1242 | if (info->fbops->fb_open) { |
1243 | res = info->fbops->fb_open(info,1); | |
1244 | if (res) | |
1245 | module_put(info->fbops->owner); | |
1246 | } | |
1247 | return res; | |
1248 | } | |
1249 | ||
1250 | static int | |
1251 | fb_release(struct inode *inode, struct file *file) | |
1252 | { | |
cae8a12f | 1253 | struct fb_info * const info = file->private_data; |
1da177e4 LT |
1254 | |
1255 | lock_kernel(); | |
1da177e4 LT |
1256 | if (info->fbops->fb_release) |
1257 | info->fbops->fb_release(info,1); | |
1258 | module_put(info->fbops->owner); | |
1259 | unlock_kernel(); | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | static struct file_operations fb_fops = { | |
1264 | .owner = THIS_MODULE, | |
1265 | .read = fb_read, | |
1266 | .write = fb_write, | |
1267 | .ioctl = fb_ioctl, | |
1268 | #ifdef CONFIG_COMPAT | |
1269 | .compat_ioctl = fb_compat_ioctl, | |
1270 | #endif | |
1271 | .mmap = fb_mmap, | |
1272 | .open = fb_open, | |
1273 | .release = fb_release, | |
1274 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1275 | .get_unmapped_area = get_fb_unmapped_area, | |
1276 | #endif | |
1277 | }; | |
1278 | ||
56b22935 | 1279 | static struct class *fb_class; |
1da177e4 LT |
1280 | |
1281 | /** | |
1282 | * register_framebuffer - registers a frame buffer device | |
1283 | * @fb_info: frame buffer info structure | |
1284 | * | |
1285 | * Registers a frame buffer device @fb_info. | |
1286 | * | |
1287 | * Returns negative errno on error, or zero for success. | |
1288 | * | |
1289 | */ | |
1290 | ||
1291 | int | |
1292 | register_framebuffer(struct fb_info *fb_info) | |
1293 | { | |
1294 | int i; | |
1295 | struct fb_event event; | |
96fe6a21 | 1296 | struct fb_videomode mode; |
1da177e4 LT |
1297 | |
1298 | if (num_registered_fb == FB_MAX) | |
1299 | return -ENXIO; | |
1300 | num_registered_fb++; | |
1301 | for (i = 0 ; i < FB_MAX; i++) | |
1302 | if (!registered_fb[i]) | |
1303 | break; | |
1304 | fb_info->node = i; | |
1305 | ||
53f46542 | 1306 | fb_info->class_device = class_device_create(fb_class, NULL, MKDEV(FB_MAJOR, i), |
1da177e4 LT |
1307 | fb_info->device, "fb%d", i); |
1308 | if (IS_ERR(fb_info->class_device)) { | |
1309 | /* Not fatal */ | |
1310 | printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device)); | |
1311 | fb_info->class_device = NULL; | |
1312 | } else | |
1313 | fb_init_class_device(fb_info); | |
1314 | ||
1315 | if (fb_info->pixmap.addr == NULL) { | |
1316 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1317 | if (fb_info->pixmap.addr) { | |
1318 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1319 | fb_info->pixmap.buf_align = 1; | |
1320 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1321 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1322 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1323 | } | |
1324 | } | |
1325 | fb_info->pixmap.offset = 0; | |
1326 | ||
96fe6a21 | 1327 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1328 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1329 | |
96fe6a21 AD |
1330 | fb_var_to_videomode(&mode, &fb_info->var); |
1331 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1332 | registered_fb[i] = fb_info; |
1333 | ||
1334 | devfs_mk_cdev(MKDEV(FB_MAJOR, i), | |
1335 | S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); | |
1336 | event.info = fb_info; | |
e041c683 | 1337 | blocking_notifier_call_chain(&fb_notifier_list, |
1da177e4 LT |
1338 | FB_EVENT_FB_REGISTERED, &event); |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | ||
1343 | /** | |
1344 | * unregister_framebuffer - releases a frame buffer device | |
1345 | * @fb_info: frame buffer info structure | |
1346 | * | |
1347 | * Unregisters a frame buffer device @fb_info. | |
1348 | * | |
1349 | * Returns negative errno on error, or zero for success. | |
1350 | * | |
1351 | */ | |
1352 | ||
1353 | int | |
1354 | unregister_framebuffer(struct fb_info *fb_info) | |
1355 | { | |
1356 | int i; | |
1357 | ||
1358 | i = fb_info->node; | |
1359 | if (!registered_fb[i]) | |
1360 | return -EINVAL; | |
1361 | devfs_remove("fb/%d", i); | |
1362 | ||
1363 | if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1364 | kfree(fb_info->pixmap.addr); | |
1365 | fb_destroy_modelist(&fb_info->modelist); | |
1366 | registered_fb[i]=NULL; | |
1367 | num_registered_fb--; | |
1368 | fb_cleanup_class_device(fb_info); | |
56b22935 | 1369 | class_device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1da177e4 LT |
1370 | return 0; |
1371 | } | |
1372 | ||
1373 | /** | |
1374 | * fb_register_client - register a client notifier | |
1375 | * @nb: notifier block to callback on events | |
1376 | */ | |
1377 | int fb_register_client(struct notifier_block *nb) | |
1378 | { | |
e041c683 | 1379 | return blocking_notifier_chain_register(&fb_notifier_list, nb); |
1da177e4 LT |
1380 | } |
1381 | ||
1382 | /** | |
1383 | * fb_unregister_client - unregister a client notifier | |
1384 | * @nb: notifier block to callback on events | |
1385 | */ | |
1386 | int fb_unregister_client(struct notifier_block *nb) | |
1387 | { | |
e041c683 | 1388 | return blocking_notifier_chain_unregister(&fb_notifier_list, nb); |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | /** | |
1392 | * fb_set_suspend - low level driver signals suspend | |
1393 | * @info: framebuffer affected | |
1394 | * @state: 0 = resuming, !=0 = suspending | |
1395 | * | |
1396 | * This is meant to be used by low level drivers to | |
1397 | * signal suspend/resume to the core & clients. | |
1398 | * It must be called with the console semaphore held | |
1399 | */ | |
1400 | void fb_set_suspend(struct fb_info *info, int state) | |
1401 | { | |
1402 | struct fb_event event; | |
1403 | ||
1404 | event.info = info; | |
1405 | if (state) { | |
e041c683 AS |
1406 | blocking_notifier_call_chain(&fb_notifier_list, |
1407 | FB_EVENT_SUSPEND, &event); | |
1da177e4 LT |
1408 | info->state = FBINFO_STATE_SUSPENDED; |
1409 | } else { | |
1410 | info->state = FBINFO_STATE_RUNNING; | |
e041c683 AS |
1411 | blocking_notifier_call_chain(&fb_notifier_list, |
1412 | FB_EVENT_RESUME, &event); | |
1da177e4 LT |
1413 | } |
1414 | } | |
1415 | ||
1416 | /** | |
1417 | * fbmem_init - init frame buffer subsystem | |
1418 | * | |
1419 | * Initialize the frame buffer subsystem. | |
1420 | * | |
1421 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1422 | * | |
1423 | */ | |
1424 | ||
1425 | static int __init | |
1426 | fbmem_init(void) | |
1427 | { | |
1428 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1429 | ||
1430 | devfs_mk_dir("fb"); | |
1431 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) | |
1432 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1433 | ||
56b22935 | 1434 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1435 | if (IS_ERR(fb_class)) { |
1436 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1437 | fb_class = NULL; | |
1438 | } | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | #ifdef MODULE | |
1443 | module_init(fbmem_init); | |
1444 | static void __exit | |
1445 | fbmem_exit(void) | |
1446 | { | |
56b22935 | 1447 | class_destroy(fb_class); |
5a340cce | 1448 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | module_exit(fbmem_exit); | |
1452 | MODULE_LICENSE("GPL"); | |
1453 | MODULE_DESCRIPTION("Framebuffer base"); | |
1454 | #else | |
1455 | subsys_initcall(fbmem_init); | |
1456 | #endif | |
1457 | ||
1458 | int fb_new_modelist(struct fb_info *info) | |
1459 | { | |
1460 | struct fb_event event; | |
1461 | struct fb_var_screeninfo var = info->var; | |
1462 | struct list_head *pos, *n; | |
1463 | struct fb_modelist *modelist; | |
1464 | struct fb_videomode *m, mode; | |
1465 | int err = 1; | |
1466 | ||
1467 | list_for_each_safe(pos, n, &info->modelist) { | |
1468 | modelist = list_entry(pos, struct fb_modelist, list); | |
1469 | m = &modelist->mode; | |
1470 | fb_videomode_to_var(&var, m); | |
1471 | var.activate = FB_ACTIVATE_TEST; | |
1472 | err = fb_set_var(info, &var); | |
1473 | fb_var_to_videomode(&mode, &var); | |
1474 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1475 | list_del(pos); | |
1476 | kfree(pos); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | err = 1; | |
1481 | ||
1482 | if (!list_empty(&info->modelist)) { | |
1483 | event.info = info; | |
e041c683 | 1484 | err = blocking_notifier_call_chain(&fb_notifier_list, |
1da177e4 LT |
1485 | FB_EVENT_NEW_MODELIST, |
1486 | &event); | |
1487 | } | |
1488 | ||
1489 | return err; | |
1490 | } | |
1491 | ||
a812c94b AD |
1492 | /** |
1493 | * fb_con_duit - user<->fbcon passthrough | |
1494 | * @info: struct fb_info | |
1495 | * @event: notification event to be passed to fbcon | |
1496 | * @data: private data | |
1497 | * | |
1498 | * DESCRIPTION | |
1499 | * This function is an fbcon-user event passing channel | |
1500 | * which bypasses fbdev. This is hopefully temporary | |
1501 | * until a user interface for fbcon is created | |
1502 | */ | |
1503 | int fb_con_duit(struct fb_info *info, int event, void *data) | |
1504 | { | |
1505 | struct fb_event evnt; | |
1506 | ||
1507 | evnt.info = info; | |
1508 | evnt.data = data; | |
1509 | ||
e041c683 | 1510 | return blocking_notifier_call_chain(&fb_notifier_list, event, &evnt); |
a812c94b | 1511 | } |
a812c94b | 1512 | |
1da177e4 LT |
1513 | static char *video_options[FB_MAX]; |
1514 | static int ofonly; | |
1515 | ||
4dc3b16b PP |
1516 | extern const char *global_mode_option; |
1517 | ||
1da177e4 LT |
1518 | /** |
1519 | * fb_get_options - get kernel boot parameters | |
1520 | * @name: framebuffer name as it would appear in | |
1521 | * the boot parameter line | |
1522 | * (video=<name>:<options>) | |
1523 | * @option: the option will be stored here | |
1524 | * | |
1525 | * NOTE: Needed to maintain backwards compatibility | |
1526 | */ | |
1527 | int fb_get_options(char *name, char **option) | |
1528 | { | |
1529 | char *opt, *options = NULL; | |
1530 | int opt_len, retval = 0; | |
1531 | int name_len = strlen(name), i; | |
1532 | ||
1533 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1534 | retval = 1; | |
1535 | ||
1536 | if (name_len && !retval) { | |
1537 | for (i = 0; i < FB_MAX; i++) { | |
1538 | if (video_options[i] == NULL) | |
1539 | continue; | |
1540 | opt_len = strlen(video_options[i]); | |
1541 | if (!opt_len) | |
1542 | continue; | |
1543 | opt = video_options[i]; | |
1544 | if (!strncmp(name, opt, name_len) && | |
1545 | opt[name_len] == ':') | |
1546 | options = opt + name_len + 1; | |
1547 | } | |
1548 | } | |
1549 | if (options && !strncmp(options, "off", 3)) | |
1550 | retval = 1; | |
1551 | ||
1552 | if (option) | |
1553 | *option = options; | |
1554 | ||
1555 | return retval; | |
1556 | } | |
1557 | ||
bc6d7fdf | 1558 | #ifndef MODULE |
1da177e4 LT |
1559 | /** |
1560 | * video_setup - process command line options | |
1561 | * @options: string of options | |
1562 | * | |
1563 | * Process command line options for frame buffer subsystem. | |
1564 | * | |
1565 | * NOTE: This function is a __setup and __init function. | |
1566 | * It only stores the options. Drivers have to call | |
1567 | * fb_get_options() as necessary. | |
1568 | * | |
1569 | * Returns zero. | |
1570 | * | |
1571 | */ | |
75c96f85 | 1572 | static int __init video_setup(char *options) |
1da177e4 LT |
1573 | { |
1574 | int i, global = 0; | |
1575 | ||
1576 | if (!options || !*options) | |
1577 | global = 1; | |
1578 | ||
1579 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1580 | ofonly = 1; | |
1581 | global = 1; | |
1582 | } | |
1583 | ||
1584 | if (!global && !strstr(options, "fb:")) { | |
1585 | global_mode_option = options; | |
1586 | global = 1; | |
1587 | } | |
1588 | ||
1589 | if (!global) { | |
1590 | for (i = 0; i < FB_MAX; i++) { | |
1591 | if (video_options[i] == NULL) { | |
1592 | video_options[i] = options; | |
1593 | break; | |
1594 | } | |
1595 | ||
1596 | } | |
1597 | } | |
1598 | ||
9b41046c | 1599 | return 1; |
1da177e4 LT |
1600 | } |
1601 | __setup("video=", video_setup); | |
bc6d7fdf | 1602 | #endif |
1da177e4 LT |
1603 | |
1604 | /* | |
1605 | * Visible symbols for modules | |
1606 | */ | |
1607 | ||
1608 | EXPORT_SYMBOL(register_framebuffer); | |
1609 | EXPORT_SYMBOL(unregister_framebuffer); | |
1610 | EXPORT_SYMBOL(num_registered_fb); | |
1611 | EXPORT_SYMBOL(registered_fb); | |
1612 | EXPORT_SYMBOL(fb_prepare_logo); | |
1613 | EXPORT_SYMBOL(fb_show_logo); | |
1614 | EXPORT_SYMBOL(fb_set_var); | |
1615 | EXPORT_SYMBOL(fb_blank); | |
1616 | EXPORT_SYMBOL(fb_pan_display); | |
1617 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 LT |
1618 | EXPORT_SYMBOL(fb_set_suspend); |
1619 | EXPORT_SYMBOL(fb_register_client); | |
1620 | EXPORT_SYMBOL(fb_unregister_client); | |
1621 | EXPORT_SYMBOL(fb_get_options); | |
1da177e4 LT |
1622 | |
1623 | MODULE_LICENSE("GPL"); |