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> |
1da177e4 LT |
16 | #include "usb.h" |
17 | ||
18 | /* Active configuration fields */ | |
19 | #define usb_actconfig_show(field, multiplier, format_string) \ | |
9251644a | 20 | static ssize_t show_##field(struct device *dev, \ |
b724ae77 | 21 | struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
22 | { \ |
23 | struct usb_device *udev; \ | |
24 | struct usb_host_config *actconfig; \ | |
25 | \ | |
9251644a | 26 | udev = to_usb_device(dev); \ |
1da177e4 LT |
27 | actconfig = udev->actconfig; \ |
28 | if (actconfig) \ | |
9251644a | 29 | return sprintf(buf, format_string, \ |
1da177e4 LT |
30 | actconfig->desc.field * multiplier); \ |
31 | else \ | |
32 | return 0; \ | |
33 | } \ | |
34 | ||
35 | #define usb_actconfig_attr(field, multiplier, format_string) \ | |
36 | usb_actconfig_show(field, multiplier, format_string) \ | |
37 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
38 | ||
9251644a ON |
39 | usb_actconfig_attr(bNumInterfaces, 1, "%2d\n") |
40 | usb_actconfig_attr(bmAttributes, 1, "%2x\n") | |
41 | usb_actconfig_attr(bMaxPower, 2, "%3dmA\n") | |
1da177e4 | 42 | |
b724ae77 AS |
43 | static ssize_t show_configuration_string(struct device *dev, |
44 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
45 | { |
46 | struct usb_device *udev; | |
47 | struct usb_host_config *actconfig; | |
1da177e4 | 48 | |
9251644a | 49 | udev = to_usb_device(dev); |
1da177e4 LT |
50 | actconfig = udev->actconfig; |
51 | if ((!actconfig) || (!actconfig->string)) | |
52 | return 0; | |
4f62efe6 | 53 | return sprintf(buf, "%s\n", actconfig->string); |
1da177e4 LT |
54 | } |
55 | static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); | |
56 | ||
57 | /* configuration value is always present, and r/w */ | |
58 | usb_actconfig_show(bConfigurationValue, 1, "%u\n"); | |
59 | ||
60 | static ssize_t | |
9251644a | 61 | set_bConfigurationValue(struct device *dev, struct device_attribute *attr, |
b724ae77 | 62 | const char *buf, size_t count) |
1da177e4 | 63 | { |
9251644a | 64 | struct usb_device *udev = to_usb_device(dev); |
1da177e4 LT |
65 | int config, value; |
66 | ||
3f141e2a | 67 | if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255) |
1da177e4 LT |
68 | return -EINVAL; |
69 | usb_lock_device(udev); | |
9251644a | 70 | value = usb_set_configuration(udev, config); |
1da177e4 LT |
71 | usb_unlock_device(udev); |
72 | return (value < 0) ? value : count; | |
73 | } | |
74 | ||
2c044a48 | 75 | static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, |
1da177e4 LT |
76 | show_bConfigurationValue, set_bConfigurationValue); |
77 | ||
78 | /* String fields */ | |
79 | #define usb_string_attr(name) \ | |
b724ae77 AS |
80 | static ssize_t show_##name(struct device *dev, \ |
81 | struct device_attribute *attr, char *buf) \ | |
1da177e4 LT |
82 | { \ |
83 | struct usb_device *udev; \ | |
1da177e4 | 84 | \ |
9251644a | 85 | udev = to_usb_device(dev); \ |
4f62efe6 | 86 | return sprintf(buf, "%s\n", udev->name); \ |
1da177e4 LT |
87 | } \ |
88 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
89 | ||
90 | usb_string_attr(product); | |
91 | usb_string_attr(manufacturer); | |
92 | usb_string_attr(serial); | |
93 | ||
94 | static ssize_t | |
9251644a | 95 | show_speed(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
96 | { |
97 | struct usb_device *udev; | |
98 | char *speed; | |
99 | ||
9251644a | 100 | udev = to_usb_device(dev); |
1da177e4 LT |
101 | |
102 | switch (udev->speed) { | |
103 | case USB_SPEED_LOW: | |
104 | speed = "1.5"; | |
105 | break; | |
106 | case USB_SPEED_UNKNOWN: | |
107 | case USB_SPEED_FULL: | |
108 | speed = "12"; | |
109 | break; | |
110 | case USB_SPEED_HIGH: | |
111 | speed = "480"; | |
112 | break; | |
113 | default: | |
114 | speed = "unknown"; | |
115 | } | |
9251644a | 116 | return sprintf(buf, "%s\n", speed); |
1da177e4 LT |
117 | } |
118 | static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); | |
119 | ||
83f7d958 AS |
120 | static ssize_t |
121 | show_busnum(struct device *dev, struct device_attribute *attr, char *buf) | |
122 | { | |
123 | struct usb_device *udev; | |
124 | ||
125 | udev = to_usb_device(dev); | |
126 | return sprintf(buf, "%d\n", udev->bus->busnum); | |
127 | } | |
128 | static DEVICE_ATTR(busnum, S_IRUGO, show_busnum, NULL); | |
129 | ||
1da177e4 | 130 | static ssize_t |
9251644a | 131 | show_devnum(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
132 | { |
133 | struct usb_device *udev; | |
134 | ||
9251644a ON |
135 | udev = to_usb_device(dev); |
136 | return sprintf(buf, "%d\n", udev->devnum); | |
1da177e4 LT |
137 | } |
138 | static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); | |
139 | ||
140 | static ssize_t | |
9251644a | 141 | show_version(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
142 | { |
143 | struct usb_device *udev; | |
144 | u16 bcdUSB; | |
145 | ||
146 | udev = to_usb_device(dev); | |
147 | bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); | |
148 | return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); | |
149 | } | |
150 | static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); | |
151 | ||
152 | static ssize_t | |
9251644a | 153 | show_maxchild(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
154 | { |
155 | struct usb_device *udev; | |
156 | ||
9251644a ON |
157 | udev = to_usb_device(dev); |
158 | return sprintf(buf, "%d\n", udev->maxchild); | |
1da177e4 LT |
159 | } |
160 | static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); | |
161 | ||
7ceec1f1 ON |
162 | static ssize_t |
163 | show_quirks(struct device *dev, struct device_attribute *attr, char *buf) | |
164 | { | |
165 | struct usb_device *udev; | |
166 | ||
167 | udev = to_usb_device(dev); | |
168 | return sprintf(buf, "0x%x\n", udev->quirks); | |
169 | } | |
170 | static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL); | |
171 | ||
4d59d8a1 SS |
172 | static ssize_t |
173 | show_urbnum(struct device *dev, struct device_attribute *attr, char *buf) | |
174 | { | |
175 | struct usb_device *udev; | |
176 | ||
177 | udev = to_usb_device(dev); | |
178 | return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); | |
179 | } | |
180 | static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL); | |
181 | ||
b41a60ec AS |
182 | |
183 | #if defined(CONFIG_USB_PERSIST) || defined(CONFIG_USB_SUSPEND) | |
184 | static const char power_group[] = "power"; | |
185 | #endif | |
186 | ||
187 | #ifdef CONFIG_USB_PERSIST | |
188 | ||
189 | static ssize_t | |
190 | show_persist(struct device *dev, struct device_attribute *attr, char *buf) | |
191 | { | |
192 | struct usb_device *udev = to_usb_device(dev); | |
193 | ||
194 | return sprintf(buf, "%d\n", udev->persist_enabled); | |
195 | } | |
196 | ||
197 | static ssize_t | |
198 | set_persist(struct device *dev, struct device_attribute *attr, | |
199 | const char *buf, size_t count) | |
200 | { | |
201 | struct usb_device *udev = to_usb_device(dev); | |
202 | int value; | |
203 | ||
204 | /* Hubs are always enabled for USB_PERSIST */ | |
205 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
206 | return -EPERM; | |
207 | ||
208 | if (sscanf(buf, "%d", &value) != 1) | |
209 | return -EINVAL; | |
210 | usb_pm_lock(udev); | |
211 | udev->persist_enabled = !!value; | |
212 | usb_pm_unlock(udev); | |
213 | return count; | |
214 | } | |
215 | ||
216 | static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist); | |
217 | ||
218 | static int add_persist_attributes(struct device *dev) | |
219 | { | |
220 | int rc = 0; | |
221 | ||
222 | if (is_usb_device(dev)) { | |
223 | struct usb_device *udev = to_usb_device(dev); | |
224 | ||
225 | /* Hubs are automatically enabled for USB_PERSIST */ | |
226 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
227 | udev->persist_enabled = 1; | |
228 | rc = sysfs_add_file_to_group(&dev->kobj, | |
229 | &dev_attr_persist.attr, | |
230 | power_group); | |
231 | } | |
232 | return rc; | |
233 | } | |
234 | ||
235 | static void remove_persist_attributes(struct device *dev) | |
236 | { | |
237 | sysfs_remove_file_from_group(&dev->kobj, | |
238 | &dev_attr_persist.attr, | |
239 | power_group); | |
240 | } | |
241 | ||
242 | #else | |
243 | ||
244 | #define add_persist_attributes(dev) 0 | |
245 | #define remove_persist_attributes(dev) do {} while (0) | |
246 | ||
247 | #endif /* CONFIG_USB_PERSIST */ | |
248 | ||
19c26239 AS |
249 | #ifdef CONFIG_USB_SUSPEND |
250 | ||
15123006 SS |
251 | static ssize_t |
252 | show_connected_duration(struct device *dev, struct device_attribute *attr, | |
253 | char *buf) | |
254 | { | |
255 | struct usb_device *udev = to_usb_device(dev); | |
256 | ||
257 | return sprintf(buf, "%u\n", | |
258 | jiffies_to_msecs(jiffies - udev->connect_time)); | |
259 | } | |
260 | ||
261 | static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL); | |
262 | ||
263 | /* | |
264 | * If the device is resumed, the last time the device was suspended has | |
265 | * been pre-subtracted from active_duration. We add the current time to | |
266 | * get the duration that the device was actually active. | |
267 | * | |
268 | * If the device is suspended, the active_duration is up-to-date. | |
269 | */ | |
270 | static ssize_t | |
271 | show_active_duration(struct device *dev, struct device_attribute *attr, | |
272 | char *buf) | |
273 | { | |
274 | struct usb_device *udev = to_usb_device(dev); | |
275 | int duration; | |
276 | ||
277 | if (udev->state != USB_STATE_SUSPENDED) | |
278 | duration = jiffies_to_msecs(jiffies + udev->active_duration); | |
279 | else | |
280 | duration = jiffies_to_msecs(udev->active_duration); | |
281 | return sprintf(buf, "%u\n", duration); | |
282 | } | |
283 | ||
284 | static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL); | |
285 | ||
19c26239 AS |
286 | static ssize_t |
287 | show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf) | |
288 | { | |
289 | struct usb_device *udev = to_usb_device(dev); | |
290 | ||
eaafbc3a | 291 | return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ); |
19c26239 AS |
292 | } |
293 | ||
294 | static ssize_t | |
295 | set_autosuspend(struct device *dev, struct device_attribute *attr, | |
296 | const char *buf, size_t count) | |
297 | { | |
298 | struct usb_device *udev = to_usb_device(dev); | |
eaafbc3a | 299 | int value; |
19c26239 | 300 | |
eaafbc3a AS |
301 | if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ || |
302 | value <= - INT_MAX/HZ) | |
19c26239 AS |
303 | return -EINVAL; |
304 | value *= HZ; | |
305 | ||
19c26239 | 306 | udev->autosuspend_delay = value; |
eaafbc3a | 307 | if (value >= 0) |
19c26239 | 308 | usb_try_autosuspend_device(udev); |
eaafbc3a | 309 | else { |
2add5229 AS |
310 | if (usb_autoresume_device(udev) == 0) |
311 | usb_autosuspend_device(udev); | |
eaafbc3a | 312 | } |
19c26239 AS |
313 | return count; |
314 | } | |
315 | ||
316 | static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR, | |
317 | show_autosuspend, set_autosuspend); | |
318 | ||
2add5229 AS |
319 | static const char on_string[] = "on"; |
320 | static const char auto_string[] = "auto"; | |
321 | static const char suspend_string[] = "suspend"; | |
322 | ||
323 | static ssize_t | |
324 | show_level(struct device *dev, struct device_attribute *attr, char *buf) | |
325 | { | |
326 | struct usb_device *udev = to_usb_device(dev); | |
327 | const char *p = auto_string; | |
328 | ||
329 | if (udev->state == USB_STATE_SUSPENDED) { | |
330 | if (udev->autoresume_disabled) | |
331 | p = suspend_string; | |
332 | } else { | |
333 | if (udev->autosuspend_disabled) | |
334 | p = on_string; | |
335 | } | |
336 | return sprintf(buf, "%s\n", p); | |
337 | } | |
338 | ||
339 | static ssize_t | |
340 | set_level(struct device *dev, struct device_attribute *attr, | |
341 | const char *buf, size_t count) | |
342 | { | |
343 | struct usb_device *udev = to_usb_device(dev); | |
344 | int len = count; | |
345 | char *cp; | |
346 | int rc = 0; | |
dd865571 | 347 | int old_autosuspend_disabled, old_autoresume_disabled; |
2add5229 AS |
348 | |
349 | cp = memchr(buf, '\n', count); | |
350 | if (cp) | |
351 | len = cp - buf; | |
352 | ||
353 | usb_lock_device(udev); | |
dd865571 AS |
354 | old_autosuspend_disabled = udev->autosuspend_disabled; |
355 | old_autoresume_disabled = udev->autoresume_disabled; | |
2add5229 AS |
356 | |
357 | /* Setting the flags without calling usb_pm_lock is a subject to | |
358 | * races, but who cares... | |
359 | */ | |
360 | if (len == sizeof on_string - 1 && | |
361 | strncmp(buf, on_string, len) == 0) { | |
362 | udev->autosuspend_disabled = 1; | |
363 | udev->autoresume_disabled = 0; | |
364 | rc = usb_external_resume_device(udev); | |
365 | ||
366 | } else if (len == sizeof auto_string - 1 && | |
367 | strncmp(buf, auto_string, len) == 0) { | |
368 | udev->autosuspend_disabled = 0; | |
369 | udev->autoresume_disabled = 0; | |
370 | rc = usb_external_resume_device(udev); | |
371 | ||
372 | } else if (len == sizeof suspend_string - 1 && | |
373 | strncmp(buf, suspend_string, len) == 0) { | |
374 | udev->autosuspend_disabled = 0; | |
375 | udev->autoresume_disabled = 1; | |
376 | rc = usb_external_suspend_device(udev, PMSG_SUSPEND); | |
377 | ||
378 | } else | |
379 | rc = -EINVAL; | |
380 | ||
dd865571 AS |
381 | if (rc) { |
382 | udev->autosuspend_disabled = old_autosuspend_disabled; | |
383 | udev->autoresume_disabled = old_autoresume_disabled; | |
384 | } | |
2add5229 AS |
385 | usb_unlock_device(udev); |
386 | return (rc < 0 ? rc : count); | |
387 | } | |
388 | ||
389 | static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level); | |
390 | ||
19c26239 AS |
391 | static int add_power_attributes(struct device *dev) |
392 | { | |
393 | int rc = 0; | |
394 | ||
2add5229 | 395 | if (is_usb_device(dev)) { |
19c26239 AS |
396 | rc = sysfs_add_file_to_group(&dev->kobj, |
397 | &dev_attr_autosuspend.attr, | |
398 | power_group); | |
2add5229 AS |
399 | if (rc == 0) |
400 | rc = sysfs_add_file_to_group(&dev->kobj, | |
401 | &dev_attr_level.attr, | |
402 | power_group); | |
15123006 SS |
403 | if (rc == 0) |
404 | rc = sysfs_add_file_to_group(&dev->kobj, | |
405 | &dev_attr_connected_duration.attr, | |
406 | power_group); | |
407 | if (rc == 0) | |
408 | rc = sysfs_add_file_to_group(&dev->kobj, | |
409 | &dev_attr_active_duration.attr, | |
410 | power_group); | |
2add5229 | 411 | } |
19c26239 AS |
412 | return rc; |
413 | } | |
414 | ||
415 | static void remove_power_attributes(struct device *dev) | |
416 | { | |
15123006 SS |
417 | sysfs_remove_file_from_group(&dev->kobj, |
418 | &dev_attr_active_duration.attr, | |
419 | power_group); | |
420 | sysfs_remove_file_from_group(&dev->kobj, | |
421 | &dev_attr_connected_duration.attr, | |
422 | power_group); | |
2add5229 AS |
423 | sysfs_remove_file_from_group(&dev->kobj, |
424 | &dev_attr_level.attr, | |
425 | power_group); | |
19c26239 AS |
426 | sysfs_remove_file_from_group(&dev->kobj, |
427 | &dev_attr_autosuspend.attr, | |
428 | power_group); | |
429 | } | |
430 | ||
431 | #else | |
432 | ||
433 | #define add_power_attributes(dev) 0 | |
434 | #define remove_power_attributes(dev) do {} while (0) | |
435 | ||
436 | #endif /* CONFIG_USB_SUSPEND */ | |
437 | ||
b41a60ec | 438 | |
1da177e4 LT |
439 | /* Descriptor fields */ |
440 | #define usb_descriptor_attr_le16(field, format_string) \ | |
441 | static ssize_t \ | |
9251644a | 442 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 443 | char *buf) \ |
1da177e4 LT |
444 | { \ |
445 | struct usb_device *udev; \ | |
446 | \ | |
9251644a ON |
447 | udev = to_usb_device(dev); \ |
448 | return sprintf(buf, format_string, \ | |
1da177e4 LT |
449 | le16_to_cpu(udev->descriptor.field)); \ |
450 | } \ | |
451 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
452 | ||
453 | usb_descriptor_attr_le16(idVendor, "%04x\n") | |
454 | usb_descriptor_attr_le16(idProduct, "%04x\n") | |
455 | usb_descriptor_attr_le16(bcdDevice, "%04x\n") | |
456 | ||
457 | #define usb_descriptor_attr(field, format_string) \ | |
458 | static ssize_t \ | |
9251644a | 459 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 460 | char *buf) \ |
1da177e4 LT |
461 | { \ |
462 | struct usb_device *udev; \ | |
463 | \ | |
9251644a ON |
464 | udev = to_usb_device(dev); \ |
465 | return sprintf(buf, format_string, udev->descriptor.field); \ | |
1da177e4 LT |
466 | } \ |
467 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
468 | ||
9251644a ON |
469 | usb_descriptor_attr(bDeviceClass, "%02x\n") |
470 | usb_descriptor_attr(bDeviceSubClass, "%02x\n") | |
471 | usb_descriptor_attr(bDeviceProtocol, "%02x\n") | |
472 | usb_descriptor_attr(bNumConfigurations, "%d\n") | |
473 | usb_descriptor_attr(bMaxPacketSize0, "%d\n") | |
1da177e4 | 474 | |
e03f2e8a IPG |
475 | |
476 | ||
477 | /* show if the device is authorized (1) or not (0) */ | |
478 | static ssize_t usb_dev_authorized_show(struct device *dev, | |
479 | struct device_attribute *attr, | |
480 | char *buf) | |
481 | { | |
482 | struct usb_device *usb_dev = to_usb_device(dev); | |
483 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); | |
484 | } | |
485 | ||
486 | ||
487 | /* | |
488 | * Authorize a device to be used in the system | |
489 | * | |
490 | * Writing a 0 deauthorizes the device, writing a 1 authorizes it. | |
491 | */ | |
492 | static ssize_t usb_dev_authorized_store(struct device *dev, | |
493 | struct device_attribute *attr, | |
494 | const char *buf, size_t size) | |
495 | { | |
496 | ssize_t result; | |
497 | struct usb_device *usb_dev = to_usb_device(dev); | |
498 | unsigned val; | |
499 | result = sscanf(buf, "%u\n", &val); | |
500 | if (result != 1) | |
501 | result = -EINVAL; | |
502 | else if (val == 0) | |
503 | result = usb_deauthorize_device(usb_dev); | |
504 | else | |
505 | result = usb_authorize_device(usb_dev); | |
506 | return result < 0? result : size; | |
507 | } | |
508 | ||
509 | static DEVICE_ATTR(authorized, 0644, | |
510 | usb_dev_authorized_show, usb_dev_authorized_store); | |
511 | ||
512 | ||
1da177e4 LT |
513 | static struct attribute *dev_attrs[] = { |
514 | /* current configuration's attributes */ | |
b6eb2d84 | 515 | &dev_attr_configuration.attr, |
1da177e4 LT |
516 | &dev_attr_bNumInterfaces.attr, |
517 | &dev_attr_bConfigurationValue.attr, | |
518 | &dev_attr_bmAttributes.attr, | |
519 | &dev_attr_bMaxPower.attr, | |
4d59d8a1 | 520 | &dev_attr_urbnum.attr, |
1da177e4 LT |
521 | /* device attributes */ |
522 | &dev_attr_idVendor.attr, | |
523 | &dev_attr_idProduct.attr, | |
524 | &dev_attr_bcdDevice.attr, | |
525 | &dev_attr_bDeviceClass.attr, | |
526 | &dev_attr_bDeviceSubClass.attr, | |
527 | &dev_attr_bDeviceProtocol.attr, | |
528 | &dev_attr_bNumConfigurations.attr, | |
cf5910bb | 529 | &dev_attr_bMaxPacketSize0.attr, |
1da177e4 | 530 | &dev_attr_speed.attr, |
83f7d958 | 531 | &dev_attr_busnum.attr, |
1da177e4 LT |
532 | &dev_attr_devnum.attr, |
533 | &dev_attr_version.attr, | |
534 | &dev_attr_maxchild.attr, | |
7ceec1f1 | 535 | &dev_attr_quirks.attr, |
e03f2e8a | 536 | &dev_attr_authorized.attr, |
1da177e4 LT |
537 | NULL, |
538 | }; | |
539 | static struct attribute_group dev_attr_grp = { | |
540 | .attrs = dev_attrs, | |
541 | }; | |
542 | ||
69d42a78 AS |
543 | /* Binary descriptors */ |
544 | ||
545 | static ssize_t | |
546 | read_descriptors(struct kobject *kobj, struct bin_attribute *attr, | |
547 | char *buf, loff_t off, size_t count) | |
548 | { | |
549 | struct usb_device *udev = to_usb_device( | |
550 | container_of(kobj, struct device, kobj)); | |
551 | size_t nleft = count; | |
552 | size_t srclen, n; | |
553 | ||
554 | usb_lock_device(udev); | |
555 | ||
556 | /* The binary attribute begins with the device descriptor */ | |
557 | srclen = sizeof(struct usb_device_descriptor); | |
558 | if (off < srclen) { | |
559 | n = min_t(size_t, nleft, srclen - off); | |
560 | memcpy(buf, off + (char *) &udev->descriptor, n); | |
561 | nleft -= n; | |
562 | buf += n; | |
563 | off = 0; | |
564 | } else { | |
565 | off -= srclen; | |
566 | } | |
567 | ||
568 | /* Then follows the raw descriptor entry for the current | |
569 | * configuration (config plus subsidiary descriptors). | |
570 | */ | |
571 | if (udev->actconfig) { | |
572 | int cfgno = udev->actconfig - udev->config; | |
573 | ||
574 | srclen = __le16_to_cpu(udev->actconfig->desc.wTotalLength); | |
575 | if (off < srclen) { | |
576 | n = min_t(size_t, nleft, srclen - off); | |
577 | memcpy(buf, off + udev->rawdescriptors[cfgno], n); | |
578 | nleft -= n; | |
579 | } | |
580 | } | |
581 | usb_unlock_device(udev); | |
582 | return count - nleft; | |
583 | } | |
584 | ||
585 | static struct bin_attribute dev_bin_attr_descriptors = { | |
586 | .attr = {.name = "descriptors", .mode = 0444}, | |
587 | .read = read_descriptors, | |
588 | .size = 18 + 65535, /* dev descr + max-size raw descriptor */ | |
589 | }; | |
590 | ||
1b21d5e1 | 591 | int usb_create_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
592 | { |
593 | struct device *dev = &udev->dev; | |
1b21d5e1 | 594 | int retval; |
1da177e4 | 595 | |
1b21d5e1 GKH |
596 | retval = sysfs_create_group(&dev->kobj, &dev_attr_grp); |
597 | if (retval) | |
598 | return retval; | |
1da177e4 | 599 | |
69d42a78 AS |
600 | retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); |
601 | if (retval) | |
602 | goto error; | |
603 | ||
b41a60ec AS |
604 | retval = add_persist_attributes(dev); |
605 | if (retval) | |
606 | goto error; | |
607 | ||
19c26239 AS |
608 | retval = add_power_attributes(dev); |
609 | if (retval) | |
610 | goto error; | |
611 | ||
1b21d5e1 | 612 | if (udev->manufacturer) { |
9251644a | 613 | retval = device_create_file(dev, &dev_attr_manufacturer); |
1b21d5e1 GKH |
614 | if (retval) |
615 | goto error; | |
616 | } | |
617 | if (udev->product) { | |
9251644a | 618 | retval = device_create_file(dev, &dev_attr_product); |
1b21d5e1 GKH |
619 | if (retval) |
620 | goto error; | |
621 | } | |
622 | if (udev->serial) { | |
9251644a | 623 | retval = device_create_file(dev, &dev_attr_serial); |
1b21d5e1 GKH |
624 | if (retval) |
625 | goto error; | |
626 | } | |
627 | retval = usb_create_ep_files(dev, &udev->ep0, udev); | |
628 | if (retval) | |
629 | goto error; | |
630 | return 0; | |
631 | error: | |
aa084f3e | 632 | usb_remove_sysfs_dev_files(udev); |
1b21d5e1 | 633 | return retval; |
1da177e4 LT |
634 | } |
635 | ||
9251644a | 636 | void usb_remove_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
637 | { |
638 | struct device *dev = &udev->dev; | |
639 | ||
be69e5b1 | 640 | usb_remove_ep_files(&udev->ep0); |
aa084f3e AS |
641 | device_remove_file(dev, &dev_attr_manufacturer); |
642 | device_remove_file(dev, &dev_attr_product); | |
643 | device_remove_file(dev, &dev_attr_serial); | |
19c26239 | 644 | remove_power_attributes(dev); |
b41a60ec | 645 | remove_persist_attributes(dev); |
69d42a78 | 646 | device_remove_bin_file(dev, &dev_bin_attr_descriptors); |
1da177e4 | 647 | sysfs_remove_group(&dev->kobj, &dev_attr_grp); |
1da177e4 LT |
648 | } |
649 | ||
165fe97e CN |
650 | /* Interface Accociation Descriptor fields */ |
651 | #define usb_intf_assoc_attr(field, format_string) \ | |
652 | static ssize_t \ | |
2c044a48 | 653 | show_iad_##field(struct device *dev, struct device_attribute *attr, \ |
165fe97e CN |
654 | char *buf) \ |
655 | { \ | |
2c044a48 | 656 | struct usb_interface *intf = to_usb_interface(dev); \ |
165fe97e | 657 | \ |
2c044a48 GKH |
658 | return sprintf(buf, format_string, \ |
659 | intf->intf_assoc->field); \ | |
165fe97e CN |
660 | } \ |
661 | static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL); | |
662 | ||
2c044a48 GKH |
663 | usb_intf_assoc_attr(bFirstInterface, "%02x\n") |
664 | usb_intf_assoc_attr(bInterfaceCount, "%02d\n") | |
665 | usb_intf_assoc_attr(bFunctionClass, "%02x\n") | |
666 | usb_intf_assoc_attr(bFunctionSubClass, "%02x\n") | |
667 | usb_intf_assoc_attr(bFunctionProtocol, "%02x\n") | |
165fe97e | 668 | |
1da177e4 LT |
669 | /* Interface fields */ |
670 | #define usb_intf_attr(field, format_string) \ | |
671 | static ssize_t \ | |
9251644a | 672 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 673 | char *buf) \ |
1da177e4 | 674 | { \ |
9251644a | 675 | struct usb_interface *intf = to_usb_interface(dev); \ |
1da177e4 | 676 | \ |
9251644a | 677 | return sprintf(buf, format_string, \ |
b724ae77 | 678 | intf->cur_altsetting->desc.field); \ |
1da177e4 LT |
679 | } \ |
680 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
681 | ||
9251644a ON |
682 | usb_intf_attr(bInterfaceNumber, "%02x\n") |
683 | usb_intf_attr(bAlternateSetting, "%2d\n") | |
684 | usb_intf_attr(bNumEndpoints, "%02x\n") | |
685 | usb_intf_attr(bInterfaceClass, "%02x\n") | |
686 | usb_intf_attr(bInterfaceSubClass, "%02x\n") | |
687 | usb_intf_attr(bInterfaceProtocol, "%02x\n") | |
1da177e4 | 688 | |
b724ae77 AS |
689 | static ssize_t show_interface_string(struct device *dev, |
690 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
691 | { |
692 | struct usb_interface *intf; | |
693 | struct usb_device *udev; | |
694 | int len; | |
695 | ||
9251644a ON |
696 | intf = to_usb_interface(dev); |
697 | udev = interface_to_usbdev(intf); | |
1da177e4 LT |
698 | len = snprintf(buf, 256, "%s", intf->cur_altsetting->string); |
699 | if (len < 0) | |
700 | return 0; | |
701 | buf[len] = '\n'; | |
702 | buf[len+1] = 0; | |
703 | return len+1; | |
704 | } | |
705 | static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL); | |
706 | ||
b724ae77 AS |
707 | static ssize_t show_modalias(struct device *dev, |
708 | struct device_attribute *attr, char *buf) | |
360b52b0 GK |
709 | { |
710 | struct usb_interface *intf; | |
711 | struct usb_device *udev; | |
7521803d | 712 | struct usb_host_interface *alt; |
360b52b0 GK |
713 | |
714 | intf = to_usb_interface(dev); | |
715 | udev = interface_to_usbdev(intf); | |
7521803d GKH |
716 | alt = intf->cur_altsetting; |
717 | ||
718 | return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" | |
719 | "ic%02Xisc%02Xip%02X\n", | |
720 | le16_to_cpu(udev->descriptor.idVendor), | |
721 | le16_to_cpu(udev->descriptor.idProduct), | |
722 | le16_to_cpu(udev->descriptor.bcdDevice), | |
723 | udev->descriptor.bDeviceClass, | |
724 | udev->descriptor.bDeviceSubClass, | |
725 | udev->descriptor.bDeviceProtocol, | |
726 | alt->desc.bInterfaceClass, | |
727 | alt->desc.bInterfaceSubClass, | |
728 | alt->desc.bInterfaceProtocol); | |
360b52b0 GK |
729 | } |
730 | static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); | |
731 | ||
165fe97e CN |
732 | static struct attribute *intf_assoc_attrs[] = { |
733 | &dev_attr_iad_bFirstInterface.attr, | |
734 | &dev_attr_iad_bInterfaceCount.attr, | |
735 | &dev_attr_iad_bFunctionClass.attr, | |
736 | &dev_attr_iad_bFunctionSubClass.attr, | |
737 | &dev_attr_iad_bFunctionProtocol.attr, | |
738 | NULL, | |
739 | }; | |
740 | static struct attribute_group intf_assoc_attr_grp = { | |
741 | .attrs = intf_assoc_attrs, | |
742 | }; | |
743 | ||
1da177e4 LT |
744 | static struct attribute *intf_attrs[] = { |
745 | &dev_attr_bInterfaceNumber.attr, | |
746 | &dev_attr_bAlternateSetting.attr, | |
747 | &dev_attr_bNumEndpoints.attr, | |
748 | &dev_attr_bInterfaceClass.attr, | |
749 | &dev_attr_bInterfaceSubClass.attr, | |
750 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 751 | &dev_attr_modalias.attr, |
1da177e4 LT |
752 | NULL, |
753 | }; | |
754 | static struct attribute_group intf_attr_grp = { | |
755 | .attrs = intf_attrs, | |
756 | }; | |
757 | ||
4f62efe6 AS |
758 | static inline void usb_create_intf_ep_files(struct usb_interface *intf, |
759 | struct usb_device *udev) | |
094f1649 GKH |
760 | { |
761 | struct usb_host_interface *iface_desc; | |
762 | int i; | |
763 | ||
764 | iface_desc = intf->cur_altsetting; | |
765 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) | |
36679ea5 | 766 | usb_create_ep_files(&intf->dev, &iface_desc->endpoint[i], |
4f62efe6 | 767 | udev); |
094f1649 GKH |
768 | } |
769 | ||
be69e5b1 | 770 | static inline void usb_remove_intf_ep_files(struct usb_interface *intf) |
094f1649 GKH |
771 | { |
772 | struct usb_host_interface *iface_desc; | |
773 | int i; | |
774 | ||
775 | iface_desc = intf->cur_altsetting; | |
776 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) | |
be69e5b1 | 777 | usb_remove_ep_files(&iface_desc->endpoint[i]); |
094f1649 GKH |
778 | } |
779 | ||
1b21d5e1 | 780 | int usb_create_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 781 | { |
aa084f3e | 782 | struct device *dev = &intf->dev; |
4f62efe6 AS |
783 | struct usb_device *udev = interface_to_usbdev(intf); |
784 | struct usb_host_interface *alt = intf->cur_altsetting; | |
1b21d5e1 | 785 | int retval; |
4f62efe6 | 786 | |
7e61559f AS |
787 | if (intf->sysfs_files_created) |
788 | return 0; | |
aa084f3e | 789 | retval = sysfs_create_group(&dev->kobj, &intf_attr_grp); |
1b21d5e1 | 790 | if (retval) |
aa084f3e | 791 | return retval; |
1da177e4 | 792 | |
4f62efe6 AS |
793 | if (alt->string == NULL) |
794 | alt->string = usb_cache_string(udev, alt->desc.iInterface); | |
795 | if (alt->string) | |
aa084f3e | 796 | retval = device_create_file(dev, &dev_attr_interface); |
165fe97e CN |
797 | if (intf->intf_assoc) |
798 | retval = sysfs_create_group(&dev->kobj, &intf_assoc_attr_grp); | |
4f62efe6 | 799 | usb_create_intf_ep_files(intf, udev); |
7e61559f | 800 | intf->sysfs_files_created = 1; |
1b21d5e1 | 801 | return 0; |
1da177e4 LT |
802 | } |
803 | ||
9251644a | 804 | void usb_remove_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 805 | { |
aa084f3e | 806 | struct device *dev = &intf->dev; |
1da177e4 | 807 | |
7e61559f AS |
808 | if (!intf->sysfs_files_created) |
809 | return; | |
aa084f3e AS |
810 | usb_remove_intf_ep_files(intf); |
811 | device_remove_file(dev, &dev_attr_interface); | |
812 | sysfs_remove_group(&dev->kobj, &intf_attr_grp); | |
165fe97e | 813 | sysfs_remove_group(&intf->dev.kobj, &intf_assoc_attr_grp); |
7e61559f | 814 | intf->sysfs_files_created = 0; |
1da177e4 | 815 | } |