blob: 1147b899f007d71eaebde3ff7d58d32ff27f935a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
35struct 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}
61EXPORT_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 */
72void framebuffer_release(struct fb_info *info)
73{
74 kfree(info);
75}
76EXPORT_SYMBOL(framebuffer_release);
77
78static 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
93static 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
106static 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
138static 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
149static 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
175static 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
193static 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
209static 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
216static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 if ((err = activate(fb_info, &var)))
233 return err;
234 return count;
235}
236
237static 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,
Jon Smirle2c16492005-06-13 15:52:36 -0700242 fb_info->var.yres_virtual);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
Jon Smirld2102242005-07-27 11:46:05 -0700245/* Format for cmap is "%02x%c%4x%4x%4x\n" */
246/* %02x entry %c transp %4x red %4x blue %4x green \n */
Jon Smirlf0b9d792005-07-28 21:16:19 -0700247/* 256 rows at 16 chars equals 4096, the normal page size */
248/* the code will automatically adjust for different page sizes */
Jon Smirld2102242005-07-27 11:46:05 -0700249static ssize_t store_cmap(struct class_device *class_device, const char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 size_t count)
251{
Jon Smirld2102242005-07-27 11:46:05 -0700252 struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
253 int rc, i, start, length, transp = 0;
254
Jon Smirlf0b9d792005-07-28 21:16:19 -0700255 if ((count > PAGE_SIZE) || ((count % 16) != 0))
Jon Smirld2102242005-07-27 11:46:05 -0700256 return -EINVAL;
257
258 if (!fb_info->fbops->fb_setcolreg && !fb_info->fbops->fb_setcmap)
259 return -EINVAL;
260
261 sscanf(buf, "%02x", &start);
262 length = count / 16;
263
264 for (i = 0; i < length; i++)
265 if (buf[i * 16 + 2] != ' ')
266 transp = 1;
267
268 /* If we can batch, do it */
269 if (fb_info->fbops->fb_setcmap && length > 1) {
270 struct fb_cmap umap;
271
272 memset(&umap, 0, sizeof(umap));
273 if ((rc = fb_alloc_cmap(&umap, length, transp)))
274 return rc;
275
276 umap.start = start;
277 for (i = 0; i < length; i++) {
278 sscanf(&buf[i * 16 + 3], "%4hx", &umap.red[i]);
279 sscanf(&buf[i * 16 + 7], "%4hx", &umap.blue[i]);
280 sscanf(&buf[i * 16 + 11], "%4hx", &umap.green[i]);
281 if (transp)
282 umap.transp[i] = (buf[i * 16 + 2] != ' ');
283 }
284 rc = fb_info->fbops->fb_setcmap(&umap, fb_info);
285 fb_copy_cmap(&umap, &fb_info->cmap);
286 fb_dealloc_cmap(&umap);
287
288 return rc;
289 }
290 for (i = 0; i < length; i++) {
291 u16 red, blue, green, tsp;
292
293 sscanf(&buf[i * 16 + 3], "%4hx", &red);
294 sscanf(&buf[i * 16 + 7], "%4hx", &blue);
295 sscanf(&buf[i * 16 + 11], "%4hx", &green);
296 tsp = (buf[i * 16 + 2] != ' ');
297 if ((rc = fb_info->fbops->fb_setcolreg(start++,
298 red, green, blue, tsp, fb_info)))
299 return rc;
300
301 fb_info->cmap.red[i] = red;
302 fb_info->cmap.blue[i] = blue;
303 fb_info->cmap.green[i] = green;
304 if (transp)
305 fb_info->cmap.transp[i] = tsp;
306 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return 0;
308}
309
310static ssize_t show_cmap(struct class_device *class_device, char *buf)
311{
312 struct fb_info *fb_info =
313 (struct fb_info *)class_get_devdata(class_device);
Jon Smirld2102242005-07-27 11:46:05 -0700314 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316 if (!fb_info->cmap.red || !fb_info->cmap.blue ||
Jon Smirld2102242005-07-27 11:46:05 -0700317 !fb_info->cmap.green)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 return -EINVAL;
319
Jon Smirlf0b9d792005-07-28 21:16:19 -0700320 if (fb_info->cmap.len > PAGE_SIZE / 16)
Jon Smirld2102242005-07-27 11:46:05 -0700321 return -EINVAL;
322
323 /* don't mess with the format, the buffer is PAGE_SIZE */
Jon Smirlf0b9d792005-07-28 21:16:19 -0700324 /* 256 entries at 16 chars per line equals 4096 = PAGE_SIZE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 for (i = 0; i < fb_info->cmap.len; i++) {
Jon Smirlf0b9d792005-07-28 21:16:19 -0700326 snprintf(&buf[ i * 16], PAGE_SIZE - i * 16, "%02x%c%4x%4x%4x\n", i + fb_info->cmap.start,
Jon Smirld2102242005-07-27 11:46:05 -0700327 ((fb_info->cmap.transp && fb_info->cmap.transp[i]) ? '*' : ' '),
328 fb_info->cmap.red[i], fb_info->cmap.blue[i],
329 fb_info->cmap.green[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 }
Jon Smirlf0b9d792005-07-28 21:16:19 -0700331 return 16 * fb_info->cmap.len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332}
333
334static ssize_t store_blank(struct class_device *class_device, const char * buf,
335 size_t count)
336{
337 struct fb_info *fb_info =
338 (struct fb_info *)class_get_devdata(class_device);
339 char *last = NULL;
340 int err;
341
342 acquire_console_sem();
343 fb_info->flags |= FBINFO_MISC_USEREVENT;
344 err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
345 fb_info->flags &= ~FBINFO_MISC_USEREVENT;
346 release_console_sem();
347 if (err < 0)
348 return err;
349 return count;
350}
351
352static ssize_t show_blank(struct class_device *class_device, char *buf)
353{
354// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
355 return 0;
356}
357
358static ssize_t store_console(struct class_device *class_device,
359 const char * buf, size_t count)
360{
361// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
362 return 0;
363}
364
365static ssize_t show_console(struct class_device *class_device, char *buf)
366{
367// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
368 return 0;
369}
370
371static ssize_t store_cursor(struct class_device *class_device,
372 const char * buf, size_t count)
373{
374// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
375 return 0;
376}
377
378static ssize_t show_cursor(struct class_device *class_device, char *buf)
379{
380// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
381 return 0;
382}
383
384static ssize_t store_pan(struct class_device *class_device, const char * buf,
385 size_t count)
386{
387 struct fb_info *fb_info =
388 (struct fb_info *)class_get_devdata(class_device);
389 struct fb_var_screeninfo var;
390 char *last = NULL;
391 int err;
392
393 var = fb_info->var;
394 var.xoffset = simple_strtoul(buf, &last, 0);
395 last++;
396 if (last - buf >= count)
397 return -EINVAL;
398 var.yoffset = simple_strtoul(last, &last, 0);
399
400 acquire_console_sem();
401 err = fb_pan_display(fb_info, &var);
402 release_console_sem();
403
404 if (err < 0)
405 return err;
406 return count;
407}
408
409static ssize_t show_pan(struct class_device *class_device, char *buf)
410{
411 struct fb_info *fb_info =
412 (struct fb_info *)class_get_devdata(class_device);
413 return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
414 fb_info->var.xoffset);
415}
416
James Simmons02459ea2005-07-30 23:49:54 +0100417static ssize_t show_name(struct class_device *class_device, char *buf)
418{
419 struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
420
421 return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
422}
423
Adrian Bunk75c96f82005-05-05 16:16:09 -0700424static struct class_device_attribute class_device_attrs[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 __ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
426 __ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
427 __ATTR(color_map, S_IRUGO|S_IWUSR, show_cmap, store_cmap),
428 __ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console),
429 __ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor),
430 __ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode),
431 __ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes),
432 __ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
433 __ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
James Simmons02459ea2005-07-30 23:49:54 +0100434 __ATTR(name, S_IRUGO, show_name, NULL),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435};
436
437int fb_init_class_device(struct fb_info *fb_info)
438{
439 unsigned int i;
440 class_set_devdata(fb_info->class_device, fb_info);
441
442 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
443 class_device_create_file(fb_info->class_device,
444 &class_device_attrs[i]);
445 return 0;
446}
447
448void fb_cleanup_class_device(struct fb_info *fb_info)
449{
450 unsigned int i;
451
452 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
453 class_device_remove_file(fb_info->class_device,
454 &class_device_attrs[i]);
455}
456
457