Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fbsysfs.c - framebuffer device class and attributes | |
3 | * | |
4 | * Copyright (c) 2004 James Simmons <jsimmons@infradead.org> | |
5 | * | |
6 | * This program is free software you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * Note: currently there's only stubs for framebuffer_alloc and | |
14 | * framebuffer_release here. The reson for that is that until all drivers | |
15 | * are converted to use it a sysfsification will open OOPSable races. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/fb.h> | |
20 | #include <linux/console.h> | |
21 | ||
22 | /** | |
23 | * framebuffer_alloc - creates a new frame buffer info structure | |
24 | * | |
25 | * @size: size of driver private data, can be zero | |
26 | * @dev: pointer to the device for this fb, this can be NULL | |
27 | * | |
28 | * Creates a new frame buffer info structure. Also reserves @size bytes | |
29 | * for driver private data (info->par). info->par (if any) will be | |
30 | * aligned to sizeof(long). | |
31 | * | |
32 | * Returns the new structure, or NULL if an error occured. | |
33 | * | |
34 | */ | |
35 | struct fb_info *framebuffer_alloc(size_t size, struct device *dev) | |
36 | { | |
37 | #define BYTES_PER_LONG (BITS_PER_LONG/8) | |
38 | #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) | |
39 | int fb_info_size = sizeof(struct fb_info); | |
40 | struct fb_info *info; | |
41 | char *p; | |
42 | ||
43 | if (size) | |
44 | fb_info_size += PADDING; | |
45 | ||
46 | p = kmalloc(fb_info_size + size, GFP_KERNEL); | |
47 | if (!p) | |
48 | return NULL; | |
49 | memset(p, 0, fb_info_size + size); | |
50 | info = (struct fb_info *) p; | |
51 | ||
52 | if (size) | |
53 | info->par = p + fb_info_size; | |
54 | ||
55 | info->device = dev; | |
56 | ||
57 | return info; | |
58 | #undef PADDING | |
59 | #undef BYTES_PER_LONG | |
60 | } | |
61 | EXPORT_SYMBOL(framebuffer_alloc); | |
62 | ||
63 | /** | |
64 | * framebuffer_release - marks the structure available for freeing | |
65 | * | |
66 | * @info: frame buffer info structure | |
67 | * | |
68 | * Drop the reference count of the class_device embedded in the | |
69 | * framebuffer info structure. | |
70 | * | |
71 | */ | |
72 | void framebuffer_release(struct fb_info *info) | |
73 | { | |
74 | kfree(info); | |
75 | } | |
76 | EXPORT_SYMBOL(framebuffer_release); | |
77 | ||
78 | static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var) | |
79 | { | |
80 | int err; | |
81 | ||
82 | var->activate |= FB_ACTIVATE_FORCE; | |
83 | acquire_console_sem(); | |
84 | fb_info->flags |= FBINFO_MISC_USEREVENT; | |
85 | err = fb_set_var(fb_info, var); | |
86 | fb_info->flags &= ~FBINFO_MISC_USEREVENT; | |
87 | release_console_sem(); | |
88 | if (err) | |
89 | return err; | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int mode_string(char *buf, unsigned int offset, | |
94 | const struct fb_videomode *mode) | |
95 | { | |
96 | char m = 'U'; | |
97 | if (mode->flag & FB_MODE_IS_DETAILED) | |
98 | m = 'D'; | |
99 | if (mode->flag & FB_MODE_IS_VESA) | |
100 | m = 'V'; | |
101 | if (mode->flag & FB_MODE_IS_STANDARD) | |
102 | m = 'S'; | |
103 | return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d-%d\n", m, mode->xres, mode->yres, mode->refresh); | |
104 | } | |
105 | ||
106 | static ssize_t store_mode(struct class_device *class_device, const char * buf, | |
107 | size_t count) | |
108 | { | |
109 | struct fb_info *fb_info = | |
110 | (struct fb_info *)class_get_devdata(class_device); | |
111 | char mstr[100]; | |
112 | struct fb_var_screeninfo var; | |
113 | struct fb_modelist *modelist; | |
114 | struct fb_videomode *mode; | |
115 | struct list_head *pos; | |
116 | size_t i; | |
117 | int err; | |
118 | ||
119 | memset(&var, 0, sizeof(var)); | |
120 | ||
121 | list_for_each(pos, &fb_info->modelist) { | |
122 | modelist = list_entry(pos, struct fb_modelist, list); | |
123 | mode = &modelist->mode; | |
124 | i = mode_string(mstr, 0, mode); | |
125 | if (strncmp(mstr, buf, max(count, i)) == 0) { | |
126 | ||
127 | var = fb_info->var; | |
128 | fb_videomode_to_var(&var, mode); | |
129 | if ((err = activate(fb_info, &var))) | |
130 | return err; | |
131 | fb_info->mode = mode; | |
132 | return count; | |
133 | } | |
134 | } | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
138 | static ssize_t show_mode(struct class_device *class_device, char *buf) | |
139 | { | |
140 | struct fb_info *fb_info = | |
141 | (struct fb_info *)class_get_devdata(class_device); | |
142 | ||
143 | if (!fb_info->mode) | |
144 | return 0; | |
145 | ||
146 | return mode_string(buf, 0, fb_info->mode); | |
147 | } | |
148 | ||
149 | static ssize_t store_modes(struct class_device *class_device, const char * buf, | |
150 | size_t count) | |
151 | { | |
152 | struct fb_info *fb_info = | |
153 | (struct fb_info *)class_get_devdata(class_device); | |
154 | LIST_HEAD(old_list); | |
155 | int i = count / sizeof(struct fb_videomode); | |
156 | ||
157 | if (i * sizeof(struct fb_videomode) != count) | |
158 | return -EINVAL; | |
159 | ||
160 | acquire_console_sem(); | |
161 | list_splice(&fb_info->modelist, &old_list); | |
162 | fb_videomode_to_modelist((struct fb_videomode *)buf, i, | |
163 | &fb_info->modelist); | |
164 | if (fb_new_modelist(fb_info)) { | |
165 | fb_destroy_modelist(&fb_info->modelist); | |
166 | list_splice(&old_list, &fb_info->modelist); | |
167 | } else | |
168 | fb_destroy_modelist(&old_list); | |
169 | ||
170 | release_console_sem(); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static ssize_t show_modes(struct class_device *class_device, char *buf) | |
176 | { | |
177 | struct fb_info *fb_info = | |
178 | (struct fb_info *)class_get_devdata(class_device); | |
179 | unsigned int i; | |
180 | struct list_head *pos; | |
181 | struct fb_modelist *modelist; | |
182 | const struct fb_videomode *mode; | |
183 | ||
184 | i = 0; | |
185 | list_for_each(pos, &fb_info->modelist) { | |
186 | modelist = list_entry(pos, struct fb_modelist, list); | |
187 | mode = &modelist->mode; | |
188 | i += mode_string(buf, i, mode); | |
189 | } | |
190 | return i; | |
191 | } | |
192 | ||
193 | static ssize_t store_bpp(struct class_device *class_device, const char * buf, | |
194 | size_t count) | |
195 | { | |
196 | struct fb_info *fb_info = | |
197 | (struct fb_info *)class_get_devdata(class_device); | |
198 | struct fb_var_screeninfo var; | |
199 | char ** last = NULL; | |
200 | int err; | |
201 | ||
202 | var = fb_info->var; | |
203 | var.bits_per_pixel = simple_strtoul(buf, last, 0); | |
204 | if ((err = activate(fb_info, &var))) | |
205 | return err; | |
206 | return count; | |
207 | } | |
208 | ||
209 | static ssize_t show_bpp(struct class_device *class_device, char *buf) | |
210 | { | |
211 | struct fb_info *fb_info = | |
212 | (struct fb_info *)class_get_devdata(class_device); | |
213 | return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel); | |
214 | } | |
215 | ||
216 | static ssize_t store_virtual(struct class_device *class_device, | |
217 | const char * buf, size_t count) | |
218 | { | |
219 | struct fb_info *fb_info = | |
220 | (struct fb_info *)class_get_devdata(class_device); | |
221 | struct fb_var_screeninfo var; | |
222 | char *last = NULL; | |
223 | int err; | |
224 | ||
225 | var = fb_info->var; | |
226 | var.xres_virtual = simple_strtoul(buf, &last, 0); | |
227 | last++; | |
228 | if (last - buf >= count) | |
229 | return -EINVAL; | |
230 | var.yres_virtual = simple_strtoul(last, &last, 0); | |
1da177e4 LT |
231 | |
232 | if ((err = activate(fb_info, &var))) | |
233 | return err; | |
234 | return count; | |
235 | } | |
236 | ||
237 | static ssize_t show_virtual(struct class_device *class_device, char *buf) | |
238 | { | |
239 | struct fb_info *fb_info = | |
240 | (struct fb_info *)class_get_devdata(class_device); | |
241 | return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual, | |
e2c16499 | 242 | fb_info->var.yres_virtual); |
1da177e4 LT |
243 | } |
244 | ||
c14e2cfc JS |
245 | static ssize_t show_stride(struct class_device *class_device, char *buf) |
246 | { | |
247 | struct fb_info *fb_info = | |
248 | (struct fb_info *)class_get_devdata(class_device); | |
249 | return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length); | |
250 | } | |
251 | ||
d2102247 JS |
252 | /* Format for cmap is "%02x%c%4x%4x%4x\n" */ |
253 | /* %02x entry %c transp %4x red %4x blue %4x green \n */ | |
f0b9d796 JS |
254 | /* 256 rows at 16 chars equals 4096, the normal page size */ |
255 | /* the code will automatically adjust for different page sizes */ | |
d2102247 | 256 | static ssize_t store_cmap(struct class_device *class_device, const char *buf, |
1da177e4 LT |
257 | size_t count) |
258 | { | |
d2102247 JS |
259 | struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); |
260 | int rc, i, start, length, transp = 0; | |
261 | ||
f0b9d796 | 262 | if ((count > PAGE_SIZE) || ((count % 16) != 0)) |
d2102247 JS |
263 | return -EINVAL; |
264 | ||
265 | if (!fb_info->fbops->fb_setcolreg && !fb_info->fbops->fb_setcmap) | |
266 | return -EINVAL; | |
267 | ||
268 | sscanf(buf, "%02x", &start); | |
269 | length = count / 16; | |
270 | ||
271 | for (i = 0; i < length; i++) | |
272 | if (buf[i * 16 + 2] != ' ') | |
273 | transp = 1; | |
274 | ||
275 | /* If we can batch, do it */ | |
276 | if (fb_info->fbops->fb_setcmap && length > 1) { | |
277 | struct fb_cmap umap; | |
278 | ||
279 | memset(&umap, 0, sizeof(umap)); | |
280 | if ((rc = fb_alloc_cmap(&umap, length, transp))) | |
281 | return rc; | |
282 | ||
283 | umap.start = start; | |
284 | for (i = 0; i < length; i++) { | |
285 | sscanf(&buf[i * 16 + 3], "%4hx", &umap.red[i]); | |
286 | sscanf(&buf[i * 16 + 7], "%4hx", &umap.blue[i]); | |
287 | sscanf(&buf[i * 16 + 11], "%4hx", &umap.green[i]); | |
288 | if (transp) | |
289 | umap.transp[i] = (buf[i * 16 + 2] != ' '); | |
290 | } | |
291 | rc = fb_info->fbops->fb_setcmap(&umap, fb_info); | |
292 | fb_copy_cmap(&umap, &fb_info->cmap); | |
293 | fb_dealloc_cmap(&umap); | |
294 | ||
295 | return rc; | |
296 | } | |
297 | for (i = 0; i < length; i++) { | |
298 | u16 red, blue, green, tsp; | |
299 | ||
300 | sscanf(&buf[i * 16 + 3], "%4hx", &red); | |
301 | sscanf(&buf[i * 16 + 7], "%4hx", &blue); | |
302 | sscanf(&buf[i * 16 + 11], "%4hx", &green); | |
303 | tsp = (buf[i * 16 + 2] != ' '); | |
304 | if ((rc = fb_info->fbops->fb_setcolreg(start++, | |
305 | red, green, blue, tsp, fb_info))) | |
306 | return rc; | |
307 | ||
308 | fb_info->cmap.red[i] = red; | |
309 | fb_info->cmap.blue[i] = blue; | |
310 | fb_info->cmap.green[i] = green; | |
311 | if (transp) | |
312 | fb_info->cmap.transp[i] = tsp; | |
313 | } | |
1da177e4 LT |
314 | return 0; |
315 | } | |
316 | ||
317 | static ssize_t show_cmap(struct class_device *class_device, char *buf) | |
318 | { | |
319 | struct fb_info *fb_info = | |
320 | (struct fb_info *)class_get_devdata(class_device); | |
d2102247 | 321 | unsigned int i; |
1da177e4 LT |
322 | |
323 | if (!fb_info->cmap.red || !fb_info->cmap.blue || | |
d2102247 JS |
324 | !fb_info->cmap.green) |
325 | return -EINVAL; | |
326 | ||
f0b9d796 | 327 | if (fb_info->cmap.len > PAGE_SIZE / 16) |
1da177e4 LT |
328 | return -EINVAL; |
329 | ||
d2102247 | 330 | /* don't mess with the format, the buffer is PAGE_SIZE */ |
f0b9d796 | 331 | /* 256 entries at 16 chars per line equals 4096 = PAGE_SIZE */ |
1da177e4 | 332 | for (i = 0; i < fb_info->cmap.len; i++) { |
f0b9d796 | 333 | snprintf(&buf[ i * 16], PAGE_SIZE - i * 16, "%02x%c%4x%4x%4x\n", i + fb_info->cmap.start, |
d2102247 JS |
334 | ((fb_info->cmap.transp && fb_info->cmap.transp[i]) ? '*' : ' '), |
335 | fb_info->cmap.red[i], fb_info->cmap.blue[i], | |
336 | fb_info->cmap.green[i]); | |
1da177e4 | 337 | } |
f0b9d796 | 338 | return 16 * fb_info->cmap.len; |
1da177e4 LT |
339 | } |
340 | ||
341 | static ssize_t store_blank(struct class_device *class_device, const char * buf, | |
342 | size_t count) | |
343 | { | |
344 | struct fb_info *fb_info = | |
345 | (struct fb_info *)class_get_devdata(class_device); | |
346 | char *last = NULL; | |
347 | int err; | |
348 | ||
349 | acquire_console_sem(); | |
350 | fb_info->flags |= FBINFO_MISC_USEREVENT; | |
351 | err = fb_blank(fb_info, simple_strtoul(buf, &last, 0)); | |
352 | fb_info->flags &= ~FBINFO_MISC_USEREVENT; | |
353 | release_console_sem(); | |
354 | if (err < 0) | |
355 | return err; | |
356 | return count; | |
357 | } | |
358 | ||
359 | static ssize_t show_blank(struct class_device *class_device, char *buf) | |
360 | { | |
361 | // struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static ssize_t store_console(struct class_device *class_device, | |
366 | const char * buf, size_t count) | |
367 | { | |
368 | // struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static ssize_t show_console(struct class_device *class_device, char *buf) | |
373 | { | |
374 | // struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static ssize_t store_cursor(struct class_device *class_device, | |
379 | const char * buf, size_t count) | |
380 | { | |
381 | // struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | static ssize_t show_cursor(struct class_device *class_device, char *buf) | |
386 | { | |
387 | // struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static ssize_t store_pan(struct class_device *class_device, const char * buf, | |
392 | size_t count) | |
393 | { | |
394 | struct fb_info *fb_info = | |
395 | (struct fb_info *)class_get_devdata(class_device); | |
396 | struct fb_var_screeninfo var; | |
397 | char *last = NULL; | |
398 | int err; | |
399 | ||
400 | var = fb_info->var; | |
401 | var.xoffset = simple_strtoul(buf, &last, 0); | |
402 | last++; | |
403 | if (last - buf >= count) | |
404 | return -EINVAL; | |
405 | var.yoffset = simple_strtoul(last, &last, 0); | |
406 | ||
407 | acquire_console_sem(); | |
408 | err = fb_pan_display(fb_info, &var); | |
409 | release_console_sem(); | |
410 | ||
411 | if (err < 0) | |
412 | return err; | |
413 | return count; | |
414 | } | |
415 | ||
416 | static ssize_t show_pan(struct class_device *class_device, char *buf) | |
417 | { | |
418 | struct fb_info *fb_info = | |
419 | (struct fb_info *)class_get_devdata(class_device); | |
420 | return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset, | |
421 | fb_info->var.xoffset); | |
422 | } | |
423 | ||
02459eaa JS |
424 | static ssize_t show_name(struct class_device *class_device, char *buf) |
425 | { | |
426 | struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device); | |
427 | ||
428 | return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id); | |
429 | } | |
430 | ||
75c96f85 | 431 | static struct class_device_attribute class_device_attrs[] = { |
1da177e4 LT |
432 | __ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp), |
433 | __ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank), | |
434 | __ATTR(color_map, S_IRUGO|S_IWUSR, show_cmap, store_cmap), | |
435 | __ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console), | |
436 | __ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor), | |
437 | __ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode), | |
438 | __ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes), | |
439 | __ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan), | |
440 | __ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual), | |
02459eaa | 441 | __ATTR(name, S_IRUGO, show_name, NULL), |
c14e2cfc | 442 | __ATTR(stride, S_IRUGO, show_stride, NULL), |
1da177e4 LT |
443 | }; |
444 | ||
445 | int fb_init_class_device(struct fb_info *fb_info) | |
446 | { | |
447 | unsigned int i; | |
448 | class_set_devdata(fb_info->class_device, fb_info); | |
449 | ||
450 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) | |
451 | class_device_create_file(fb_info->class_device, | |
452 | &class_device_attrs[i]); | |
453 | return 0; | |
454 | } | |
455 | ||
456 | void fb_cleanup_class_device(struct fb_info *fb_info) | |
457 | { | |
458 | unsigned int i; | |
459 | ||
460 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) | |
461 | class_device_remove_file(fb_info->class_device, | |
462 | &class_device_attrs[i]); | |
463 | } | |
464 | ||
465 |