blob: 40c80c8190e2f744dfc43e3f99fb08189a0c303e [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>
Michael Hanselmann5474c122006-06-25 05:47:08 -070021#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -070023#define FB_SYSFS_FLAG_ATTR 1
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/**
26 * framebuffer_alloc - creates a new frame buffer info structure
27 *
28 * @size: size of driver private data, can be zero
29 * @dev: pointer to the device for this fb, this can be NULL
30 *
31 * Creates a new frame buffer info structure. Also reserves @size bytes
32 * for driver private data (info->par). info->par (if any) will be
33 * aligned to sizeof(long).
34 *
35 * Returns the new structure, or NULL if an error occured.
36 *
37 */
38struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
39{
40#define BYTES_PER_LONG (BITS_PER_LONG/8)
41#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
42 int fb_info_size = sizeof(struct fb_info);
43 struct fb_info *info;
44 char *p;
45
46 if (size)
47 fb_info_size += PADDING;
48
Antonino A. Daplasdef1ede2006-01-09 20:53:45 -080049 p = kzalloc(fb_info_size + size, GFP_KERNEL);
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 if (!p)
52 return NULL;
Antonino A. Daplasdef1ede2006-01-09 20:53:45 -080053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 info = (struct fb_info *) p;
55
56 if (size)
57 info->par = p + fb_info_size;
58
59 info->device = dev;
60
Michael Hanselmann5474c122006-06-25 05:47:08 -070061#ifdef CONFIG_FB_BACKLIGHT
Richard Purdie37ce69a2007-02-10 14:10:33 +000062 mutex_init(&info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -070063#endif
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 return info;
66#undef PADDING
67#undef BYTES_PER_LONG
68}
69EXPORT_SYMBOL(framebuffer_alloc);
70
71/**
72 * framebuffer_release - marks the structure available for freeing
73 *
74 * @info: frame buffer info structure
75 *
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -070076 * Drop the reference count of the device embedded in the
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 * framebuffer info structure.
78 *
79 */
80void framebuffer_release(struct fb_info *info)
81{
82 kfree(info);
83}
84EXPORT_SYMBOL(framebuffer_release);
85
86static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var)
87{
88 int err;
89
90 var->activate |= FB_ACTIVATE_FORCE;
91 acquire_console_sem();
92 fb_info->flags |= FBINFO_MISC_USEREVENT;
93 err = fb_set_var(fb_info, var);
94 fb_info->flags &= ~FBINFO_MISC_USEREVENT;
95 release_console_sem();
96 if (err)
97 return err;
98 return 0;
99}
100
101static int mode_string(char *buf, unsigned int offset,
102 const struct fb_videomode *mode)
103{
104 char m = 'U';
Daniel R Thompson9dac73a2006-06-26 00:27:00 -0700105 char v = 'p';
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 if (mode->flag & FB_MODE_IS_DETAILED)
108 m = 'D';
109 if (mode->flag & FB_MODE_IS_VESA)
110 m = 'V';
111 if (mode->flag & FB_MODE_IS_STANDARD)
112 m = 'S';
Daniel R Thompson9dac73a2006-06-26 00:27:00 -0700113
114 if (mode->vmode & FB_VMODE_INTERLACED)
115 v = 'i';
116 if (mode->vmode & FB_VMODE_DOUBLE)
117 v = 'd';
118
119 return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d%c-%d\n",
120 m, mode->xres, mode->yres, v, mode->refresh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121}
122
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700123static ssize_t store_mode(struct device *device, struct device_attribute *attr,
124 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700126 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 char mstr[100];
128 struct fb_var_screeninfo var;
129 struct fb_modelist *modelist;
130 struct fb_videomode *mode;
131 struct list_head *pos;
132 size_t i;
133 int err;
134
135 memset(&var, 0, sizeof(var));
136
137 list_for_each(pos, &fb_info->modelist) {
138 modelist = list_entry(pos, struct fb_modelist, list);
139 mode = &modelist->mode;
140 i = mode_string(mstr, 0, mode);
141 if (strncmp(mstr, buf, max(count, i)) == 0) {
142
143 var = fb_info->var;
144 fb_videomode_to_var(&var, mode);
145 if ((err = activate(fb_info, &var)))
146 return err;
147 fb_info->mode = mode;
148 return count;
149 }
150 }
151 return -EINVAL;
152}
153
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700154static ssize_t show_mode(struct device *device, struct device_attribute *attr,
155 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700157 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 if (!fb_info->mode)
160 return 0;
161
162 return mode_string(buf, 0, fb_info->mode);
163}
164
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700165static ssize_t store_modes(struct device *device,
166 struct device_attribute *attr,
167 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700169 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 LIST_HEAD(old_list);
171 int i = count / sizeof(struct fb_videomode);
172
173 if (i * sizeof(struct fb_videomode) != count)
174 return -EINVAL;
175
176 acquire_console_sem();
177 list_splice(&fb_info->modelist, &old_list);
Geert Uytterhoeven9791d762007-02-12 00:55:19 -0800178 fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 &fb_info->modelist);
180 if (fb_new_modelist(fb_info)) {
181 fb_destroy_modelist(&fb_info->modelist);
182 list_splice(&old_list, &fb_info->modelist);
183 } else
184 fb_destroy_modelist(&old_list);
185
186 release_console_sem();
187
188 return 0;
189}
190
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700191static ssize_t show_modes(struct device *device, struct device_attribute *attr,
192 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700194 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 unsigned int i;
196 struct list_head *pos;
197 struct fb_modelist *modelist;
198 const struct fb_videomode *mode;
199
200 i = 0;
201 list_for_each(pos, &fb_info->modelist) {
202 modelist = list_entry(pos, struct fb_modelist, list);
203 mode = &modelist->mode;
204 i += mode_string(buf, i, mode);
205 }
206 return i;
207}
208
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700209static ssize_t store_bpp(struct device *device, struct device_attribute *attr,
210 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700212 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct fb_var_screeninfo var;
214 char ** last = NULL;
215 int err;
216
217 var = fb_info->var;
218 var.bits_per_pixel = simple_strtoul(buf, last, 0);
219 if ((err = activate(fb_info, &var)))
220 return err;
221 return count;
222}
223
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700224static ssize_t show_bpp(struct device *device, struct device_attribute *attr,
225 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700227 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
229}
230
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700231static ssize_t store_rotate(struct device *device,
232 struct device_attribute *attr,
233 const char *buf, size_t count)
Antonino A. Daplasa812c942005-11-08 21:39:15 -0800234{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700235 struct fb_info *fb_info = dev_get_drvdata(device);
Antonino A. Daplasa812c942005-11-08 21:39:15 -0800236 struct fb_var_screeninfo var;
237 char **last = NULL;
238 int err;
239
240 var = fb_info->var;
241 var.rotate = simple_strtoul(buf, last, 0);
242
243 if ((err = activate(fb_info, &var)))
244 return err;
245
246 return count;
247}
248
249
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700250static ssize_t show_rotate(struct device *device,
251 struct device_attribute *attr, char *buf)
Antonino A. Daplasa812c942005-11-08 21:39:15 -0800252{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700253 struct fb_info *fb_info = dev_get_drvdata(device);
Antonino A. Daplasa812c942005-11-08 21:39:15 -0800254
255 return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
256}
257
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700258static ssize_t store_virtual(struct device *device,
259 struct device_attribute *attr,
260 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700262 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 struct fb_var_screeninfo var;
264 char *last = NULL;
265 int err;
266
267 var = fb_info->var;
268 var.xres_virtual = simple_strtoul(buf, &last, 0);
269 last++;
270 if (last - buf >= count)
271 return -EINVAL;
272 var.yres_virtual = simple_strtoul(last, &last, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 if ((err = activate(fb_info, &var)))
275 return err;
276 return count;
277}
278
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700279static ssize_t show_virtual(struct device *device,
280 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700282 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
Jon Smirle2c16492005-06-13 15:52:36 -0700284 fb_info->var.yres_virtual);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700287static ssize_t show_stride(struct device *device,
288 struct device_attribute *attr, char *buf)
James Simmonsc14e2cf2005-10-24 21:46:21 +0100289{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700290 struct fb_info *fb_info = dev_get_drvdata(device);
James Simmonsc14e2cf2005-10-24 21:46:21 +0100291 return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
292}
293
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700294static ssize_t store_blank(struct device *device,
295 struct device_attribute *attr,
296 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700298 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 char *last = NULL;
300 int err;
301
302 acquire_console_sem();
303 fb_info->flags |= FBINFO_MISC_USEREVENT;
304 err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
305 fb_info->flags &= ~FBINFO_MISC_USEREVENT;
306 release_console_sem();
307 if (err < 0)
308 return err;
309 return count;
310}
311
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700312static ssize_t show_blank(struct device *device,
313 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700315// struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 return 0;
317}
318
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700319static ssize_t store_console(struct device *device,
320 struct device_attribute *attr,
321 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700323// struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 return 0;
325}
326
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700327static ssize_t show_console(struct device *device,
328 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700330// struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 return 0;
332}
333
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700334static ssize_t store_cursor(struct device *device,
335 struct device_attribute *attr,
336 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700338// struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 return 0;
340}
341
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700342static ssize_t show_cursor(struct device *device,
343 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700345// struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 return 0;
347}
348
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700349static ssize_t store_pan(struct device *device,
350 struct device_attribute *attr,
351 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700353 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 struct fb_var_screeninfo var;
355 char *last = NULL;
356 int err;
357
358 var = fb_info->var;
359 var.xoffset = simple_strtoul(buf, &last, 0);
360 last++;
361 if (last - buf >= count)
362 return -EINVAL;
363 var.yoffset = simple_strtoul(last, &last, 0);
364
365 acquire_console_sem();
366 err = fb_pan_display(fb_info, &var);
367 release_console_sem();
368
369 if (err < 0)
370 return err;
371 return count;
372}
373
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700374static ssize_t show_pan(struct device *device,
375 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700377 struct fb_info *fb_info = dev_get_drvdata(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
379 fb_info->var.xoffset);
380}
381
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700382static ssize_t show_name(struct device *device,
383 struct device_attribute *attr, char *buf)
James Simmons02459ea2005-07-30 23:49:54 +0100384{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700385 struct fb_info *fb_info = dev_get_drvdata(device);
James Simmons02459ea2005-07-30 23:49:54 +0100386
387 return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
388}
389
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700390static ssize_t store_fbstate(struct device *device,
391 struct device_attribute *attr,
392 const char *buf, size_t count)
Matthew Garrett30420f82006-01-09 20:53:01 -0800393{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700394 struct fb_info *fb_info = dev_get_drvdata(device);
Matthew Garrett30420f82006-01-09 20:53:01 -0800395 u32 state;
396 char *last = NULL;
397
398 state = simple_strtoul(buf, &last, 0);
399
400 acquire_console_sem();
401 fb_set_suspend(fb_info, (int)state);
402 release_console_sem();
403
404 return count;
405}
406
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700407static ssize_t show_fbstate(struct device *device,
408 struct device_attribute *attr, char *buf)
Matthew Garrett30420f82006-01-09 20:53:01 -0800409{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700410 struct fb_info *fb_info = dev_get_drvdata(device);
Matthew Garrett30420f82006-01-09 20:53:01 -0800411 return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
412}
413
Michael Hanselmann5474c122006-06-25 05:47:08 -0700414#ifdef CONFIG_FB_BACKLIGHT
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700415static ssize_t store_bl_curve(struct device *device,
416 struct device_attribute *attr,
417 const char *buf, size_t count)
Michael Hanselmann5474c122006-06-25 05:47:08 -0700418{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700419 struct fb_info *fb_info = dev_get_drvdata(device);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700420 u8 tmp_curve[FB_BACKLIGHT_LEVELS];
421 unsigned int i;
422
Michael Hanselmann25981de2006-09-25 16:25:07 -0700423 /* Some drivers don't use framebuffer_alloc(), but those also
424 * don't have backlights.
425 */
426 if (!fb_info || !fb_info->bl_dev)
427 return -ENODEV;
428
Michael Hanselmann5474c122006-06-25 05:47:08 -0700429 if (count != (FB_BACKLIGHT_LEVELS / 8 * 24))
430 return -EINVAL;
431
432 for (i = 0; i < (FB_BACKLIGHT_LEVELS / 8); ++i)
433 if (sscanf(&buf[i * 24],
434 "%2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx\n",
435 &tmp_curve[i * 8 + 0],
436 &tmp_curve[i * 8 + 1],
437 &tmp_curve[i * 8 + 2],
438 &tmp_curve[i * 8 + 3],
439 &tmp_curve[i * 8 + 4],
440 &tmp_curve[i * 8 + 5],
441 &tmp_curve[i * 8 + 6],
442 &tmp_curve[i * 8 + 7]) != 8)
443 return -EINVAL;
444
445 /* If there has been an error in the input data, we won't
446 * reach this loop.
447 */
Richard Purdie37ce69a2007-02-10 14:10:33 +0000448 mutex_lock(&fb_info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700449 for (i = 0; i < FB_BACKLIGHT_LEVELS; ++i)
450 fb_info->bl_curve[i] = tmp_curve[i];
Richard Purdie37ce69a2007-02-10 14:10:33 +0000451 mutex_unlock(&fb_info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700452
453 return count;
454}
455
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700456static ssize_t show_bl_curve(struct device *device,
457 struct device_attribute *attr, char *buf)
Michael Hanselmann5474c122006-06-25 05:47:08 -0700458{
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700459 struct fb_info *fb_info = dev_get_drvdata(device);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700460 ssize_t len = 0;
461 unsigned int i;
462
Michael Hanselmann25981de2006-09-25 16:25:07 -0700463 /* Some drivers don't use framebuffer_alloc(), but those also
464 * don't have backlights.
465 */
466 if (!fb_info || !fb_info->bl_dev)
467 return -ENODEV;
468
Richard Purdie37ce69a2007-02-10 14:10:33 +0000469 mutex_lock(&fb_info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700470 for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
471 len += snprintf(&buf[len], PAGE_SIZE,
472 "%02x %02x %02x %02x %02x %02x %02x %02x\n",
473 fb_info->bl_curve[i + 0],
474 fb_info->bl_curve[i + 1],
475 fb_info->bl_curve[i + 2],
476 fb_info->bl_curve[i + 3],
477 fb_info->bl_curve[i + 4],
478 fb_info->bl_curve[i + 5],
479 fb_info->bl_curve[i + 6],
480 fb_info->bl_curve[i + 7]);
Richard Purdie37ce69a2007-02-10 14:10:33 +0000481 mutex_unlock(&fb_info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700482
483 return len;
484}
485#endif
486
Jon Smirl913e7ec2006-04-12 19:43:35 -0400487/* When cmap is added back in it should be a binary attribute
488 * not a text one. Consideration should also be given to converting
489 * fbdev to use configfs instead of sysfs */
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700490static struct device_attribute device_attrs[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 __ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
492 __ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 __ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console),
494 __ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor),
495 __ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode),
496 __ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes),
497 __ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
498 __ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
James Simmons02459ea2005-07-30 23:49:54 +0100499 __ATTR(name, S_IRUGO, show_name, NULL),
James Simmonsc14e2cf2005-10-24 21:46:21 +0100500 __ATTR(stride, S_IRUGO, show_stride, NULL),
Antonino A. Daplasa812c942005-11-08 21:39:15 -0800501 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
Matthew Garrett30420f82006-01-09 20:53:01 -0800502 __ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
Michael Hanselmann5474c122006-06-25 05:47:08 -0700503#ifdef CONFIG_FB_BACKLIGHT
504 __ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),
505#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506};
507
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700508int fb_init_device(struct fb_info *fb_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700510 int i, error = 0;
511
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700512 dev_set_drvdata(fb_info->dev, fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700514 fb_info->class_flag |= FB_SYSFS_FLAG_ATTR;
515
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700516 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
517 error = device_create_file(fb_info->dev, &device_attrs[i]);
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700518
519 if (error)
520 break;
521 }
522
523 if (error) {
524 while (--i >= 0)
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700525 device_remove_file(fb_info->dev, &device_attrs[i]);
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700526 fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
527 }
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 return 0;
530}
531
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700532void fb_cleanup_device(struct fb_info *fb_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
534 unsigned int i;
535
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700536 if (fb_info->class_flag & FB_SYSFS_FLAG_ATTR) {
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -0700537 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
538 device_remove_file(fb_info->dev, &device_attrs[i]);
Antonino A. Daplas1a6600b2006-10-03 01:14:50 -0700539
540 fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
541 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
Michael Hanselmann5474c122006-06-25 05:47:08 -0700544#ifdef CONFIG_FB_BACKLIGHT
545/* This function generates a linear backlight curve
546 *
547 * 0: off
548 * 1-7: min
549 * 8-127: linear from min to max
550 */
551void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max)
552{
553 unsigned int i, flat, count, range = (max - min);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
Richard Purdie37ce69a2007-02-10 14:10:33 +0000555 mutex_lock(&fb_info->bl_curve_mutex);
556
Michael Hanselmann5474c122006-06-25 05:47:08 -0700557 fb_info->bl_curve[0] = off;
558
559 for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat)
560 fb_info->bl_curve[flat] = min;
561
562 count = FB_BACKLIGHT_LEVELS * 15 / 16;
563 for (i = 0; i < count; ++i)
564 fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count);
Richard Purdie37ce69a2007-02-10 14:10:33 +0000565
566 mutex_unlock(&fb_info->bl_curve_mutex);
Michael Hanselmann5474c122006-06-25 05:47:08 -0700567}
568EXPORT_SYMBOL_GPL(fb_bl_default_curve);
569#endif