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