Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/usb/core/sysfs.c | |
3 | * | |
4 | * (C) Copyright 2002 David Brownell | |
5 | * (C) Copyright 2002,2004 Greg Kroah-Hartman | |
6 | * (C) Copyright 2002,2004 IBM Corp. | |
7 | * | |
8 | * All of the sysfs file attributes for usb devices and interfaces. | |
9 | * | |
10 | */ | |
11 | ||
12 | ||
1da177e4 | 13 | #include <linux/kernel.h> |
2add5229 | 14 | #include <linux/string.h> |
1da177e4 | 15 | #include <linux/usb.h> |
1662e3a7 | 16 | #include <linux/usb/quirks.h> |
1da177e4 LT |
17 | #include "usb.h" |
18 | ||
19 | /* Active configuration fields */ | |
20 | #define usb_actconfig_show(field, multiplier, format_string) \ | |
9251644a | 21 | static ssize_t show_##field(struct device *dev, \ |
b724ae77 | 22 | struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
23 | { \ |
24 | struct usb_device *udev; \ | |
25 | struct usb_host_config *actconfig; \ | |
26 | \ | |
9251644a | 27 | udev = to_usb_device(dev); \ |
1da177e4 LT |
28 | actconfig = udev->actconfig; \ |
29 | if (actconfig) \ | |
9251644a | 30 | return sprintf(buf, format_string, \ |
1da177e4 LT |
31 | actconfig->desc.field * multiplier); \ |
32 | else \ | |
33 | return 0; \ | |
34 | } \ | |
35 | ||
36 | #define usb_actconfig_attr(field, multiplier, format_string) \ | |
37 | usb_actconfig_show(field, multiplier, format_string) \ | |
38 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
39 | ||
9251644a ON |
40 | usb_actconfig_attr(bNumInterfaces, 1, "%2d\n") |
41 | usb_actconfig_attr(bmAttributes, 1, "%2x\n") | |
42 | usb_actconfig_attr(bMaxPower, 2, "%3dmA\n") | |
1da177e4 | 43 | |
b724ae77 AS |
44 | static ssize_t show_configuration_string(struct device *dev, |
45 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
46 | { |
47 | struct usb_device *udev; | |
48 | struct usb_host_config *actconfig; | |
1da177e4 | 49 | |
9251644a | 50 | udev = to_usb_device(dev); |
1da177e4 LT |
51 | actconfig = udev->actconfig; |
52 | if ((!actconfig) || (!actconfig->string)) | |
53 | return 0; | |
4f62efe6 | 54 | return sprintf(buf, "%s\n", actconfig->string); |
1da177e4 LT |
55 | } |
56 | static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); | |
57 | ||
58 | /* configuration value is always present, and r/w */ | |
59 | usb_actconfig_show(bConfigurationValue, 1, "%u\n"); | |
60 | ||
61 | static ssize_t | |
9251644a | 62 | set_bConfigurationValue(struct device *dev, struct device_attribute *attr, |
b724ae77 | 63 | const char *buf, size_t count) |
1da177e4 | 64 | { |
9251644a | 65 | struct usb_device *udev = to_usb_device(dev); |
1da177e4 LT |
66 | int config, value; |
67 | ||
3f141e2a | 68 | if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255) |
1da177e4 LT |
69 | return -EINVAL; |
70 | usb_lock_device(udev); | |
9251644a | 71 | value = usb_set_configuration(udev, config); |
1da177e4 LT |
72 | usb_unlock_device(udev); |
73 | return (value < 0) ? value : count; | |
74 | } | |
75 | ||
2c044a48 | 76 | static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, |
1da177e4 LT |
77 | show_bConfigurationValue, set_bConfigurationValue); |
78 | ||
79 | /* String fields */ | |
80 | #define usb_string_attr(name) \ | |
b724ae77 AS |
81 | static ssize_t show_##name(struct device *dev, \ |
82 | struct device_attribute *attr, char *buf) \ | |
1da177e4 LT |
83 | { \ |
84 | struct usb_device *udev; \ | |
da307123 | 85 | int retval; \ |
1da177e4 | 86 | \ |
9251644a | 87 | udev = to_usb_device(dev); \ |
da307123 AS |
88 | usb_lock_device(udev); \ |
89 | retval = sprintf(buf, "%s\n", udev->name); \ | |
90 | usb_unlock_device(udev); \ | |
91 | return retval; \ | |
1da177e4 LT |
92 | } \ |
93 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
94 | ||
95 | usb_string_attr(product); | |
96 | usb_string_attr(manufacturer); | |
97 | usb_string_attr(serial); | |
98 | ||
99 | static ssize_t | |
9251644a | 100 | show_speed(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
101 | { |
102 | struct usb_device *udev; | |
103 | char *speed; | |
104 | ||
9251644a | 105 | udev = to_usb_device(dev); |
1da177e4 LT |
106 | |
107 | switch (udev->speed) { | |
108 | case USB_SPEED_LOW: | |
109 | speed = "1.5"; | |
110 | break; | |
111 | case USB_SPEED_UNKNOWN: | |
112 | case USB_SPEED_FULL: | |
113 | speed = "12"; | |
114 | break; | |
115 | case USB_SPEED_HIGH: | |
116 | speed = "480"; | |
117 | break; | |
b132b04e GKH |
118 | case USB_SPEED_VARIABLE: |
119 | speed = "480"; | |
120 | break; | |
121 | case USB_SPEED_SUPER: | |
122 | speed = "5000"; | |
123 | break; | |
1da177e4 LT |
124 | default: |
125 | speed = "unknown"; | |
126 | } | |
9251644a | 127 | return sprintf(buf, "%s\n", speed); |
1da177e4 LT |
128 | } |
129 | static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); | |
130 | ||
83f7d958 AS |
131 | static ssize_t |
132 | show_busnum(struct device *dev, struct device_attribute *attr, char *buf) | |
133 | { | |
134 | struct usb_device *udev; | |
135 | ||
136 | udev = to_usb_device(dev); | |
137 | return sprintf(buf, "%d\n", udev->bus->busnum); | |
138 | } | |
139 | static DEVICE_ATTR(busnum, S_IRUGO, show_busnum, NULL); | |
140 | ||
1da177e4 | 141 | static ssize_t |
9251644a | 142 | show_devnum(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
143 | { |
144 | struct usb_device *udev; | |
145 | ||
9251644a ON |
146 | udev = to_usb_device(dev); |
147 | return sprintf(buf, "%d\n", udev->devnum); | |
1da177e4 LT |
148 | } |
149 | static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); | |
150 | ||
9af23624 GKH |
151 | static ssize_t |
152 | show_devpath(struct device *dev, struct device_attribute *attr, char *buf) | |
153 | { | |
154 | struct usb_device *udev; | |
155 | ||
156 | udev = to_usb_device(dev); | |
157 | return sprintf(buf, "%s\n", udev->devpath); | |
158 | } | |
159 | static DEVICE_ATTR(devpath, S_IRUGO, show_devpath, NULL); | |
160 | ||
1da177e4 | 161 | static ssize_t |
9251644a | 162 | show_version(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
163 | { |
164 | struct usb_device *udev; | |
165 | u16 bcdUSB; | |
166 | ||
167 | udev = to_usb_device(dev); | |
168 | bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); | |
169 | return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); | |
170 | } | |
171 | static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); | |
172 | ||
173 | static ssize_t | |
9251644a | 174 | show_maxchild(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
175 | { |
176 | struct usb_device *udev; | |
177 | ||
9251644a ON |
178 | udev = to_usb_device(dev); |
179 | return sprintf(buf, "%d\n", udev->maxchild); | |
1da177e4 LT |
180 | } |
181 | static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); | |
182 | ||
7ceec1f1 ON |
183 | static ssize_t |
184 | show_quirks(struct device *dev, struct device_attribute *attr, char *buf) | |
185 | { | |
186 | struct usb_device *udev; | |
187 | ||
188 | udev = to_usb_device(dev); | |
189 | return sprintf(buf, "0x%x\n", udev->quirks); | |
190 | } | |
191 | static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL); | |
192 | ||
ef955341 ON |
193 | static ssize_t |
194 | show_avoid_reset_quirk(struct device *dev, struct device_attribute *attr, char *buf) | |
195 | { | |
196 | struct usb_device *udev; | |
197 | ||
198 | udev = to_usb_device(dev); | |
199 | return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET_MORPHS)); | |
200 | } | |
201 | ||
202 | static ssize_t | |
203 | set_avoid_reset_quirk(struct device *dev, struct device_attribute *attr, | |
204 | const char *buf, size_t count) | |
205 | { | |
206 | struct usb_device *udev = to_usb_device(dev); | |
207 | int config; | |
208 | ||
209 | if (sscanf(buf, "%d", &config) != 1 || config < 0 || config > 1) | |
210 | return -EINVAL; | |
211 | usb_lock_device(udev); | |
212 | if (config) | |
213 | udev->quirks |= USB_QUIRK_RESET_MORPHS; | |
214 | else | |
215 | udev->quirks &= ~USB_QUIRK_RESET_MORPHS; | |
216 | usb_unlock_device(udev); | |
217 | return count; | |
218 | } | |
219 | ||
220 | static DEVICE_ATTR(avoid_reset_quirk, S_IRUGO | S_IWUSR, | |
221 | show_avoid_reset_quirk, set_avoid_reset_quirk); | |
222 | ||
4d59d8a1 SS |
223 | static ssize_t |
224 | show_urbnum(struct device *dev, struct device_attribute *attr, char *buf) | |
225 | { | |
226 | struct usb_device *udev; | |
227 | ||
228 | udev = to_usb_device(dev); | |
229 | return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); | |
230 | } | |
231 | static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL); | |
232 | ||
b41a60ec | 233 | |
feccc30d | 234 | #ifdef CONFIG_PM |
b41a60ec | 235 | |
feccc30d | 236 | static const char power_group[] = "power"; |
b41a60ec AS |
237 | |
238 | static ssize_t | |
239 | show_persist(struct device *dev, struct device_attribute *attr, char *buf) | |
240 | { | |
241 | struct usb_device *udev = to_usb_device(dev); | |
242 | ||
243 | return sprintf(buf, "%d\n", udev->persist_enabled); | |
244 | } | |
245 | ||
246 | static ssize_t | |
247 | set_persist(struct device *dev, struct device_attribute *attr, | |
248 | const char *buf, size_t count) | |
249 | { | |
250 | struct usb_device *udev = to_usb_device(dev); | |
251 | int value; | |
252 | ||
253 | /* Hubs are always enabled for USB_PERSIST */ | |
254 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
255 | return -EPERM; | |
256 | ||
257 | if (sscanf(buf, "%d", &value) != 1) | |
258 | return -EINVAL; | |
259 | usb_pm_lock(udev); | |
260 | udev->persist_enabled = !!value; | |
261 | usb_pm_unlock(udev); | |
262 | return count; | |
263 | } | |
264 | ||
265 | static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist); | |
266 | ||
267 | static int add_persist_attributes(struct device *dev) | |
268 | { | |
269 | int rc = 0; | |
270 | ||
271 | if (is_usb_device(dev)) { | |
272 | struct usb_device *udev = to_usb_device(dev); | |
273 | ||
feccc30d AS |
274 | /* Hubs are automatically enabled for USB_PERSIST, |
275 | * no point in creating the attribute file. | |
276 | */ | |
277 | if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) | |
278 | rc = sysfs_add_file_to_group(&dev->kobj, | |
279 | &dev_attr_persist.attr, | |
280 | power_group); | |
b41a60ec AS |
281 | } |
282 | return rc; | |
283 | } | |
284 | ||
285 | static void remove_persist_attributes(struct device *dev) | |
286 | { | |
287 | sysfs_remove_file_from_group(&dev->kobj, | |
288 | &dev_attr_persist.attr, | |
289 | power_group); | |
290 | } | |
b41a60ec AS |
291 | #else |
292 | ||
293 | #define add_persist_attributes(dev) 0 | |
294 | #define remove_persist_attributes(dev) do {} while (0) | |
295 | ||
feccc30d | 296 | #endif /* CONFIG_PM */ |
b41a60ec | 297 | |
19c26239 AS |
298 | #ifdef CONFIG_USB_SUSPEND |
299 | ||
15123006 SS |
300 | static ssize_t |
301 | show_connected_duration(struct device *dev, struct device_attribute *attr, | |
302 | char *buf) | |
303 | { | |
304 | struct usb_device *udev = to_usb_device(dev); | |
305 | ||
306 | return sprintf(buf, "%u\n", | |
307 | jiffies_to_msecs(jiffies - udev->connect_time)); | |
308 | } | |
309 | ||
310 | static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL); | |
311 | ||
312 | /* | |
313 | * If the device is resumed, the last time the device was suspended has | |
314 | * been pre-subtracted from active_duration. We add the current time to | |
315 | * get the duration that the device was actually active. | |
316 | * | |
317 | * If the device is suspended, the active_duration is up-to-date. | |
318 | */ | |
319 | static ssize_t | |
320 | show_active_duration(struct device *dev, struct device_attribute *attr, | |
321 | char *buf) | |
322 | { | |
323 | struct usb_device *udev = to_usb_device(dev); | |
324 | int duration; | |
325 | ||
326 | if (udev->state != USB_STATE_SUSPENDED) | |
327 | duration = jiffies_to_msecs(jiffies + udev->active_duration); | |
328 | else | |
329 | duration = jiffies_to_msecs(udev->active_duration); | |
330 | return sprintf(buf, "%u\n", duration); | |
331 | } | |
332 | ||
333 | static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL); | |
334 | ||
19c26239 AS |
335 | static ssize_t |
336 | show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf) | |
337 | { | |
338 | struct usb_device *udev = to_usb_device(dev); | |
339 | ||
eaafbc3a | 340 | return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ); |
19c26239 AS |
341 | } |
342 | ||
343 | static ssize_t | |
344 | set_autosuspend(struct device *dev, struct device_attribute *attr, | |
345 | const char *buf, size_t count) | |
346 | { | |
347 | struct usb_device *udev = to_usb_device(dev); | |
eaafbc3a | 348 | int value; |
19c26239 | 349 | |
eaafbc3a AS |
350 | if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ || |
351 | value <= - INT_MAX/HZ) | |
19c26239 AS |
352 | return -EINVAL; |
353 | value *= HZ; | |
354 | ||
19c26239 | 355 | udev->autosuspend_delay = value; |
eaafbc3a | 356 | if (value >= 0) |
19c26239 | 357 | usb_try_autosuspend_device(udev); |
eaafbc3a | 358 | else { |
2add5229 AS |
359 | if (usb_autoresume_device(udev) == 0) |
360 | usb_autosuspend_device(udev); | |
eaafbc3a | 361 | } |
19c26239 AS |
362 | return count; |
363 | } | |
364 | ||
365 | static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR, | |
366 | show_autosuspend, set_autosuspend); | |
367 | ||
2add5229 AS |
368 | static const char on_string[] = "on"; |
369 | static const char auto_string[] = "auto"; | |
2add5229 AS |
370 | |
371 | static ssize_t | |
372 | show_level(struct device *dev, struct device_attribute *attr, char *buf) | |
373 | { | |
374 | struct usb_device *udev = to_usb_device(dev); | |
375 | const char *p = auto_string; | |
376 | ||
8e4ceb38 AS |
377 | if (udev->state != USB_STATE_SUSPENDED && udev->autosuspend_disabled) |
378 | p = on_string; | |
2add5229 AS |
379 | return sprintf(buf, "%s\n", p); |
380 | } | |
381 | ||
382 | static ssize_t | |
383 | set_level(struct device *dev, struct device_attribute *attr, | |
384 | const char *buf, size_t count) | |
385 | { | |
386 | struct usb_device *udev = to_usb_device(dev); | |
387 | int len = count; | |
388 | char *cp; | |
389 | int rc = 0; | |
8e4ceb38 | 390 | int old_autosuspend_disabled; |
2add5229 AS |
391 | |
392 | cp = memchr(buf, '\n', count); | |
393 | if (cp) | |
394 | len = cp - buf; | |
395 | ||
396 | usb_lock_device(udev); | |
dd865571 | 397 | old_autosuspend_disabled = udev->autosuspend_disabled; |
2add5229 AS |
398 | |
399 | /* Setting the flags without calling usb_pm_lock is a subject to | |
400 | * races, but who cares... | |
401 | */ | |
402 | if (len == sizeof on_string - 1 && | |
403 | strncmp(buf, on_string, len) == 0) { | |
404 | udev->autosuspend_disabled = 1; | |
65bfd296 | 405 | rc = usb_external_resume_device(udev, PMSG_USER_RESUME); |
2add5229 AS |
406 | |
407 | } else if (len == sizeof auto_string - 1 && | |
408 | strncmp(buf, auto_string, len) == 0) { | |
409 | udev->autosuspend_disabled = 0; | |
65bfd296 | 410 | rc = usb_external_resume_device(udev, PMSG_USER_RESUME); |
2add5229 | 411 | |
2add5229 AS |
412 | } else |
413 | rc = -EINVAL; | |
414 | ||
8e4ceb38 | 415 | if (rc) |
dd865571 | 416 | udev->autosuspend_disabled = old_autosuspend_disabled; |
2add5229 AS |
417 | usb_unlock_device(udev); |
418 | return (rc < 0 ? rc : count); | |
419 | } | |
420 | ||
421 | static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level); | |
422 | ||
19c26239 AS |
423 | static int add_power_attributes(struct device *dev) |
424 | { | |
425 | int rc = 0; | |
426 | ||
2add5229 | 427 | if (is_usb_device(dev)) { |
19c26239 AS |
428 | rc = sysfs_add_file_to_group(&dev->kobj, |
429 | &dev_attr_autosuspend.attr, | |
430 | power_group); | |
2add5229 AS |
431 | if (rc == 0) |
432 | rc = sysfs_add_file_to_group(&dev->kobj, | |
433 | &dev_attr_level.attr, | |
434 | power_group); | |
15123006 SS |
435 | if (rc == 0) |
436 | rc = sysfs_add_file_to_group(&dev->kobj, | |
437 | &dev_attr_connected_duration.attr, | |
438 | power_group); | |
439 | if (rc == 0) | |
440 | rc = sysfs_add_file_to_group(&dev->kobj, | |
441 | &dev_attr_active_duration.attr, | |
442 | power_group); | |
2add5229 | 443 | } |
19c26239 AS |
444 | return rc; |
445 | } | |
446 | ||
447 | static void remove_power_attributes(struct device *dev) | |
448 | { | |
15123006 SS |
449 | sysfs_remove_file_from_group(&dev->kobj, |
450 | &dev_attr_active_duration.attr, | |
451 | power_group); | |
452 | sysfs_remove_file_from_group(&dev->kobj, | |
453 | &dev_attr_connected_duration.attr, | |
454 | power_group); | |
2add5229 AS |
455 | sysfs_remove_file_from_group(&dev->kobj, |
456 | &dev_attr_level.attr, | |
457 | power_group); | |
19c26239 AS |
458 | sysfs_remove_file_from_group(&dev->kobj, |
459 | &dev_attr_autosuspend.attr, | |
460 | power_group); | |
461 | } | |
462 | ||
463 | #else | |
464 | ||
465 | #define add_power_attributes(dev) 0 | |
466 | #define remove_power_attributes(dev) do {} while (0) | |
467 | ||
468 | #endif /* CONFIG_USB_SUSPEND */ | |
469 | ||
b41a60ec | 470 | |
1da177e4 LT |
471 | /* Descriptor fields */ |
472 | #define usb_descriptor_attr_le16(field, format_string) \ | |
473 | static ssize_t \ | |
9251644a | 474 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 475 | char *buf) \ |
1da177e4 LT |
476 | { \ |
477 | struct usb_device *udev; \ | |
478 | \ | |
9251644a ON |
479 | udev = to_usb_device(dev); \ |
480 | return sprintf(buf, format_string, \ | |
1da177e4 LT |
481 | le16_to_cpu(udev->descriptor.field)); \ |
482 | } \ | |
483 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
484 | ||
485 | usb_descriptor_attr_le16(idVendor, "%04x\n") | |
486 | usb_descriptor_attr_le16(idProduct, "%04x\n") | |
487 | usb_descriptor_attr_le16(bcdDevice, "%04x\n") | |
488 | ||
489 | #define usb_descriptor_attr(field, format_string) \ | |
490 | static ssize_t \ | |
9251644a | 491 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 492 | char *buf) \ |
1da177e4 LT |
493 | { \ |
494 | struct usb_device *udev; \ | |
495 | \ | |
9251644a ON |
496 | udev = to_usb_device(dev); \ |
497 | return sprintf(buf, format_string, udev->descriptor.field); \ | |
1da177e4 LT |
498 | } \ |
499 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
500 | ||
9251644a ON |
501 | usb_descriptor_attr(bDeviceClass, "%02x\n") |
502 | usb_descriptor_attr(bDeviceSubClass, "%02x\n") | |
503 | usb_descriptor_attr(bDeviceProtocol, "%02x\n") | |
504 | usb_descriptor_attr(bNumConfigurations, "%d\n") | |
505 | usb_descriptor_attr(bMaxPacketSize0, "%d\n") | |
1da177e4 | 506 | |
e03f2e8a IPG |
507 | |
508 | ||
509 | /* show if the device is authorized (1) or not (0) */ | |
510 | static ssize_t usb_dev_authorized_show(struct device *dev, | |
511 | struct device_attribute *attr, | |
512 | char *buf) | |
513 | { | |
514 | struct usb_device *usb_dev = to_usb_device(dev); | |
515 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); | |
516 | } | |
517 | ||
518 | ||
519 | /* | |
520 | * Authorize a device to be used in the system | |
521 | * | |
522 | * Writing a 0 deauthorizes the device, writing a 1 authorizes it. | |
523 | */ | |
524 | static ssize_t usb_dev_authorized_store(struct device *dev, | |
525 | struct device_attribute *attr, | |
526 | const char *buf, size_t size) | |
527 | { | |
528 | ssize_t result; | |
529 | struct usb_device *usb_dev = to_usb_device(dev); | |
530 | unsigned val; | |
531 | result = sscanf(buf, "%u\n", &val); | |
532 | if (result != 1) | |
533 | result = -EINVAL; | |
534 | else if (val == 0) | |
535 | result = usb_deauthorize_device(usb_dev); | |
536 | else | |
537 | result = usb_authorize_device(usb_dev); | |
538 | return result < 0? result : size; | |
539 | } | |
540 | ||
541 | static DEVICE_ATTR(authorized, 0644, | |
542 | usb_dev_authorized_show, usb_dev_authorized_store); | |
543 | ||
253e0572 AS |
544 | /* "Safely remove a device" */ |
545 | static ssize_t usb_remove_store(struct device *dev, | |
546 | struct device_attribute *attr, | |
547 | const char *buf, size_t count) | |
548 | { | |
549 | struct usb_device *udev = to_usb_device(dev); | |
550 | int rc = 0; | |
551 | ||
552 | usb_lock_device(udev); | |
553 | if (udev->state != USB_STATE_NOTATTACHED) { | |
554 | ||
555 | /* To avoid races, first unconfigure and then remove */ | |
556 | usb_set_configuration(udev, -1); | |
557 | rc = usb_remove_device(udev); | |
558 | } | |
559 | if (rc == 0) | |
560 | rc = count; | |
561 | usb_unlock_device(udev); | |
562 | return rc; | |
563 | } | |
564 | static DEVICE_ATTR(remove, 0200, NULL, usb_remove_store); | |
565 | ||
e03f2e8a | 566 | |
1da177e4 LT |
567 | static struct attribute *dev_attrs[] = { |
568 | /* current configuration's attributes */ | |
b6eb2d84 | 569 | &dev_attr_configuration.attr, |
1da177e4 LT |
570 | &dev_attr_bNumInterfaces.attr, |
571 | &dev_attr_bConfigurationValue.attr, | |
572 | &dev_attr_bmAttributes.attr, | |
573 | &dev_attr_bMaxPower.attr, | |
574 | /* device attributes */ | |
9af23624 | 575 | &dev_attr_urbnum.attr, |
1da177e4 LT |
576 | &dev_attr_idVendor.attr, |
577 | &dev_attr_idProduct.attr, | |
578 | &dev_attr_bcdDevice.attr, | |
579 | &dev_attr_bDeviceClass.attr, | |
580 | &dev_attr_bDeviceSubClass.attr, | |
581 | &dev_attr_bDeviceProtocol.attr, | |
582 | &dev_attr_bNumConfigurations.attr, | |
cf5910bb | 583 | &dev_attr_bMaxPacketSize0.attr, |
1da177e4 | 584 | &dev_attr_speed.attr, |
83f7d958 | 585 | &dev_attr_busnum.attr, |
1da177e4 | 586 | &dev_attr_devnum.attr, |
9af23624 | 587 | &dev_attr_devpath.attr, |
1da177e4 LT |
588 | &dev_attr_version.attr, |
589 | &dev_attr_maxchild.attr, | |
7ceec1f1 | 590 | &dev_attr_quirks.attr, |
ef955341 | 591 | &dev_attr_avoid_reset_quirk.attr, |
e03f2e8a | 592 | &dev_attr_authorized.attr, |
253e0572 | 593 | &dev_attr_remove.attr, |
1da177e4 LT |
594 | NULL, |
595 | }; | |
596 | static struct attribute_group dev_attr_grp = { | |
597 | .attrs = dev_attrs, | |
598 | }; | |
599 | ||
2e5f10e4 AS |
600 | /* When modifying this list, be sure to modify dev_string_attrs_are_visible() |
601 | * accordingly. | |
602 | */ | |
603 | static struct attribute *dev_string_attrs[] = { | |
604 | &dev_attr_manufacturer.attr, | |
605 | &dev_attr_product.attr, | |
606 | &dev_attr_serial.attr, | |
607 | NULL | |
608 | }; | |
609 | ||
610 | static mode_t dev_string_attrs_are_visible(struct kobject *kobj, | |
611 | struct attribute *a, int n) | |
612 | { | |
a864e3aa HS |
613 | struct device *dev = container_of(kobj, struct device, kobj); |
614 | struct usb_device *udev = to_usb_device(dev); | |
2e5f10e4 AS |
615 | |
616 | if (a == &dev_attr_manufacturer.attr) { | |
617 | if (udev->manufacturer == NULL) | |
618 | return 0; | |
619 | } else if (a == &dev_attr_product.attr) { | |
620 | if (udev->product == NULL) | |
621 | return 0; | |
622 | } else if (a == &dev_attr_serial.attr) { | |
623 | if (udev->serial == NULL) | |
624 | return 0; | |
625 | } | |
626 | return a->mode; | |
627 | } | |
628 | ||
629 | static struct attribute_group dev_string_attr_grp = { | |
630 | .attrs = dev_string_attrs, | |
631 | .is_visible = dev_string_attrs_are_visible, | |
632 | }; | |
633 | ||
a4dbd674 | 634 | const struct attribute_group *usb_device_groups[] = { |
2e5f10e4 AS |
635 | &dev_attr_grp, |
636 | &dev_string_attr_grp, | |
637 | NULL | |
638 | }; | |
639 | ||
69d42a78 AS |
640 | /* Binary descriptors */ |
641 | ||
642 | static ssize_t | |
643 | read_descriptors(struct kobject *kobj, struct bin_attribute *attr, | |
644 | char *buf, loff_t off, size_t count) | |
645 | { | |
a864e3aa HS |
646 | struct device *dev = container_of(kobj, struct device, kobj); |
647 | struct usb_device *udev = to_usb_device(dev); | |
69d42a78 AS |
648 | size_t nleft = count; |
649 | size_t srclen, n; | |
217a9081 AS |
650 | int cfgno; |
651 | void *src; | |
69d42a78 | 652 | |
217a9081 AS |
653 | /* The binary attribute begins with the device descriptor. |
654 | * Following that are the raw descriptor entries for all the | |
655 | * configurations (config plus subsidiary descriptors). | |
69d42a78 | 656 | */ |
217a9081 AS |
657 | for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations && |
658 | nleft > 0; ++cfgno) { | |
659 | if (cfgno < 0) { | |
660 | src = &udev->descriptor; | |
661 | srclen = sizeof(struct usb_device_descriptor); | |
662 | } else { | |
663 | src = udev->rawdescriptors[cfgno]; | |
664 | srclen = __le16_to_cpu(udev->config[cfgno].desc. | |
665 | wTotalLength); | |
666 | } | |
69d42a78 | 667 | if (off < srclen) { |
217a9081 AS |
668 | n = min(nleft, srclen - (size_t) off); |
669 | memcpy(buf, src + off, n); | |
69d42a78 | 670 | nleft -= n; |
217a9081 AS |
671 | buf += n; |
672 | off = 0; | |
673 | } else { | |
674 | off -= srclen; | |
69d42a78 AS |
675 | } |
676 | } | |
69d42a78 AS |
677 | return count - nleft; |
678 | } | |
679 | ||
680 | static struct bin_attribute dev_bin_attr_descriptors = { | |
681 | .attr = {.name = "descriptors", .mode = 0444}, | |
682 | .read = read_descriptors, | |
683 | .size = 18 + 65535, /* dev descr + max-size raw descriptor */ | |
684 | }; | |
685 | ||
1b21d5e1 | 686 | int usb_create_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
687 | { |
688 | struct device *dev = &udev->dev; | |
1b21d5e1 | 689 | int retval; |
1da177e4 | 690 | |
69d42a78 AS |
691 | retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); |
692 | if (retval) | |
693 | goto error; | |
694 | ||
b41a60ec AS |
695 | retval = add_persist_attributes(dev); |
696 | if (retval) | |
697 | goto error; | |
698 | ||
19c26239 AS |
699 | retval = add_power_attributes(dev); |
700 | if (retval) | |
701 | goto error; | |
3b23dd6f | 702 | return retval; |
1b21d5e1 | 703 | error: |
aa084f3e | 704 | usb_remove_sysfs_dev_files(udev); |
1b21d5e1 | 705 | return retval; |
1da177e4 LT |
706 | } |
707 | ||
9251644a | 708 | void usb_remove_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
709 | { |
710 | struct device *dev = &udev->dev; | |
711 | ||
19c26239 | 712 | remove_power_attributes(dev); |
b41a60ec | 713 | remove_persist_attributes(dev); |
69d42a78 | 714 | device_remove_bin_file(dev, &dev_bin_attr_descriptors); |
1da177e4 LT |
715 | } |
716 | ||
165fe97e CN |
717 | /* Interface Accociation Descriptor fields */ |
718 | #define usb_intf_assoc_attr(field, format_string) \ | |
719 | static ssize_t \ | |
2c044a48 | 720 | show_iad_##field(struct device *dev, struct device_attribute *attr, \ |
165fe97e CN |
721 | char *buf) \ |
722 | { \ | |
2c044a48 | 723 | struct usb_interface *intf = to_usb_interface(dev); \ |
165fe97e | 724 | \ |
2c044a48 GKH |
725 | return sprintf(buf, format_string, \ |
726 | intf->intf_assoc->field); \ | |
165fe97e CN |
727 | } \ |
728 | static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL); | |
729 | ||
2c044a48 GKH |
730 | usb_intf_assoc_attr(bFirstInterface, "%02x\n") |
731 | usb_intf_assoc_attr(bInterfaceCount, "%02d\n") | |
732 | usb_intf_assoc_attr(bFunctionClass, "%02x\n") | |
733 | usb_intf_assoc_attr(bFunctionSubClass, "%02x\n") | |
734 | usb_intf_assoc_attr(bFunctionProtocol, "%02x\n") | |
165fe97e | 735 | |
1da177e4 LT |
736 | /* Interface fields */ |
737 | #define usb_intf_attr(field, format_string) \ | |
738 | static ssize_t \ | |
9251644a | 739 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 740 | char *buf) \ |
1da177e4 | 741 | { \ |
9251644a | 742 | struct usb_interface *intf = to_usb_interface(dev); \ |
1da177e4 | 743 | \ |
9251644a | 744 | return sprintf(buf, format_string, \ |
b724ae77 | 745 | intf->cur_altsetting->desc.field); \ |
1da177e4 LT |
746 | } \ |
747 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
748 | ||
9251644a ON |
749 | usb_intf_attr(bInterfaceNumber, "%02x\n") |
750 | usb_intf_attr(bAlternateSetting, "%2d\n") | |
751 | usb_intf_attr(bNumEndpoints, "%02x\n") | |
752 | usb_intf_attr(bInterfaceClass, "%02x\n") | |
753 | usb_intf_attr(bInterfaceSubClass, "%02x\n") | |
754 | usb_intf_attr(bInterfaceProtocol, "%02x\n") | |
1da177e4 | 755 | |
b724ae77 AS |
756 | static ssize_t show_interface_string(struct device *dev, |
757 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
758 | { |
759 | struct usb_interface *intf; | |
2e5f10e4 | 760 | char *string; |
1da177e4 | 761 | |
9251644a | 762 | intf = to_usb_interface(dev); |
2e5f10e4 AS |
763 | string = intf->cur_altsetting->string; |
764 | barrier(); /* The altsetting might change! */ | |
765 | ||
766 | if (!string) | |
1da177e4 | 767 | return 0; |
2e5f10e4 | 768 | return sprintf(buf, "%s\n", string); |
1da177e4 LT |
769 | } |
770 | static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL); | |
771 | ||
b724ae77 AS |
772 | static ssize_t show_modalias(struct device *dev, |
773 | struct device_attribute *attr, char *buf) | |
360b52b0 GK |
774 | { |
775 | struct usb_interface *intf; | |
776 | struct usb_device *udev; | |
7521803d | 777 | struct usb_host_interface *alt; |
360b52b0 GK |
778 | |
779 | intf = to_usb_interface(dev); | |
780 | udev = interface_to_usbdev(intf); | |
7521803d GKH |
781 | alt = intf->cur_altsetting; |
782 | ||
783 | return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" | |
784 | "ic%02Xisc%02Xip%02X\n", | |
785 | le16_to_cpu(udev->descriptor.idVendor), | |
786 | le16_to_cpu(udev->descriptor.idProduct), | |
787 | le16_to_cpu(udev->descriptor.bcdDevice), | |
788 | udev->descriptor.bDeviceClass, | |
789 | udev->descriptor.bDeviceSubClass, | |
790 | udev->descriptor.bDeviceProtocol, | |
791 | alt->desc.bInterfaceClass, | |
792 | alt->desc.bInterfaceSubClass, | |
793 | alt->desc.bInterfaceProtocol); | |
360b52b0 GK |
794 | } |
795 | static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); | |
796 | ||
49e7cc84 SS |
797 | static ssize_t show_supports_autosuspend(struct device *dev, |
798 | struct device_attribute *attr, char *buf) | |
799 | { | |
800 | struct usb_interface *intf; | |
801 | struct usb_device *udev; | |
802 | int ret; | |
803 | ||
804 | intf = to_usb_interface(dev); | |
805 | udev = interface_to_usbdev(intf); | |
806 | ||
807 | usb_lock_device(udev); | |
808 | /* Devices will be autosuspended even when an interface isn't claimed */ | |
809 | if (!intf->dev.driver || | |
810 | to_usb_driver(intf->dev.driver)->supports_autosuspend) | |
811 | ret = sprintf(buf, "%u\n", 1); | |
812 | else | |
813 | ret = sprintf(buf, "%u\n", 0); | |
814 | usb_unlock_device(udev); | |
815 | ||
816 | return ret; | |
817 | } | |
818 | static DEVICE_ATTR(supports_autosuspend, S_IRUGO, show_supports_autosuspend, NULL); | |
819 | ||
1da177e4 LT |
820 | static struct attribute *intf_attrs[] = { |
821 | &dev_attr_bInterfaceNumber.attr, | |
822 | &dev_attr_bAlternateSetting.attr, | |
823 | &dev_attr_bNumEndpoints.attr, | |
824 | &dev_attr_bInterfaceClass.attr, | |
825 | &dev_attr_bInterfaceSubClass.attr, | |
826 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 827 | &dev_attr_modalias.attr, |
49e7cc84 | 828 | &dev_attr_supports_autosuspend.attr, |
1da177e4 LT |
829 | NULL, |
830 | }; | |
831 | static struct attribute_group intf_attr_grp = { | |
832 | .attrs = intf_attrs, | |
833 | }; | |
834 | ||
2e5f10e4 AS |
835 | static struct attribute *intf_assoc_attrs[] = { |
836 | &dev_attr_iad_bFirstInterface.attr, | |
837 | &dev_attr_iad_bInterfaceCount.attr, | |
838 | &dev_attr_iad_bFunctionClass.attr, | |
839 | &dev_attr_iad_bFunctionSubClass.attr, | |
840 | &dev_attr_iad_bFunctionProtocol.attr, | |
841 | NULL, | |
842 | }; | |
843 | ||
844 | static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj, | |
845 | struct attribute *a, int n) | |
846 | { | |
a864e3aa HS |
847 | struct device *dev = container_of(kobj, struct device, kobj); |
848 | struct usb_interface *intf = to_usb_interface(dev); | |
2e5f10e4 AS |
849 | |
850 | if (intf->intf_assoc == NULL) | |
851 | return 0; | |
852 | return a->mode; | |
853 | } | |
854 | ||
855 | static struct attribute_group intf_assoc_attr_grp = { | |
856 | .attrs = intf_assoc_attrs, | |
857 | .is_visible = intf_assoc_attrs_are_visible, | |
858 | }; | |
859 | ||
a4dbd674 | 860 | const struct attribute_group *usb_interface_groups[] = { |
2e5f10e4 AS |
861 | &intf_attr_grp, |
862 | &intf_assoc_attr_grp, | |
863 | NULL | |
864 | }; | |
865 | ||
1b21d5e1 | 866 | int usb_create_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 867 | { |
4f62efe6 AS |
868 | struct usb_device *udev = interface_to_usbdev(intf); |
869 | struct usb_host_interface *alt = intf->cur_altsetting; | |
1b21d5e1 | 870 | int retval; |
4f62efe6 | 871 | |
352d0263 | 872 | if (intf->sysfs_files_created || intf->unregistering) |
7e61559f | 873 | return 0; |
1da177e4 | 874 | |
1662e3a7 AS |
875 | if (alt->string == NULL && |
876 | !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS)) | |
4f62efe6 AS |
877 | alt->string = usb_cache_string(udev, alt->desc.iInterface); |
878 | if (alt->string) | |
2e5f10e4 | 879 | retval = device_create_file(&intf->dev, &dev_attr_interface); |
7e61559f | 880 | intf->sysfs_files_created = 1; |
1b21d5e1 | 881 | return 0; |
1da177e4 LT |
882 | } |
883 | ||
9251644a | 884 | void usb_remove_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 885 | { |
7e61559f AS |
886 | if (!intf->sysfs_files_created) |
887 | return; | |
92b0da15 | 888 | |
92b0da15 | 889 | device_remove_file(&intf->dev, &dev_attr_interface); |
7e61559f | 890 | intf->sysfs_files_created = 0; |
1da177e4 | 891 | } |