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