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; | |
551cdbbe | 118 | case USB_SPEED_WIRELESS: |
b132b04e GKH |
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 | |
b41a60ec AS |
236 | static ssize_t |
237 | show_persist(struct device *dev, struct device_attribute *attr, char *buf) | |
238 | { | |
239 | struct usb_device *udev = to_usb_device(dev); | |
240 | ||
241 | return sprintf(buf, "%d\n", udev->persist_enabled); | |
242 | } | |
243 | ||
244 | static ssize_t | |
245 | set_persist(struct device *dev, struct device_attribute *attr, | |
246 | const char *buf, size_t count) | |
247 | { | |
248 | struct usb_device *udev = to_usb_device(dev); | |
249 | int value; | |
250 | ||
251 | /* Hubs are always enabled for USB_PERSIST */ | |
252 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
253 | return -EPERM; | |
254 | ||
255 | if (sscanf(buf, "%d", &value) != 1) | |
256 | return -EINVAL; | |
0c4db6df AS |
257 | |
258 | usb_lock_device(udev); | |
b41a60ec | 259 | udev->persist_enabled = !!value; |
0c4db6df | 260 | usb_unlock_device(udev); |
b41a60ec AS |
261 | return count; |
262 | } | |
263 | ||
264 | static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist); | |
265 | ||
266 | static int add_persist_attributes(struct device *dev) | |
267 | { | |
268 | int rc = 0; | |
269 | ||
270 | if (is_usb_device(dev)) { | |
271 | struct usb_device *udev = to_usb_device(dev); | |
272 | ||
feccc30d AS |
273 | /* Hubs are automatically enabled for USB_PERSIST, |
274 | * no point in creating the attribute file. | |
275 | */ | |
276 | if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) | |
277 | rc = sysfs_add_file_to_group(&dev->kobj, | |
278 | &dev_attr_persist.attr, | |
045cac6b | 279 | power_group_name); |
b41a60ec AS |
280 | } |
281 | return rc; | |
282 | } | |
283 | ||
284 | static void remove_persist_attributes(struct device *dev) | |
285 | { | |
286 | sysfs_remove_file_from_group(&dev->kobj, | |
287 | &dev_attr_persist.attr, | |
045cac6b | 288 | power_group_name); |
b41a60ec | 289 | } |
b41a60ec AS |
290 | #else |
291 | ||
292 | #define add_persist_attributes(dev) 0 | |
293 | #define remove_persist_attributes(dev) do {} while (0) | |
294 | ||
feccc30d | 295 | #endif /* CONFIG_PM */ |
b41a60ec | 296 | |
19c26239 AS |
297 | #ifdef CONFIG_USB_SUSPEND |
298 | ||
15123006 SS |
299 | static ssize_t |
300 | show_connected_duration(struct device *dev, struct device_attribute *attr, | |
301 | char *buf) | |
302 | { | |
303 | struct usb_device *udev = to_usb_device(dev); | |
304 | ||
305 | return sprintf(buf, "%u\n", | |
306 | jiffies_to_msecs(jiffies - udev->connect_time)); | |
307 | } | |
308 | ||
309 | static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL); | |
310 | ||
311 | /* | |
312 | * If the device is resumed, the last time the device was suspended has | |
313 | * been pre-subtracted from active_duration. We add the current time to | |
314 | * get the duration that the device was actually active. | |
315 | * | |
316 | * If the device is suspended, the active_duration is up-to-date. | |
317 | */ | |
318 | static ssize_t | |
319 | show_active_duration(struct device *dev, struct device_attribute *attr, | |
320 | char *buf) | |
321 | { | |
322 | struct usb_device *udev = to_usb_device(dev); | |
323 | int duration; | |
324 | ||
325 | if (udev->state != USB_STATE_SUSPENDED) | |
326 | duration = jiffies_to_msecs(jiffies + udev->active_duration); | |
327 | else | |
328 | duration = jiffies_to_msecs(udev->active_duration); | |
329 | return sprintf(buf, "%u\n", duration); | |
330 | } | |
331 | ||
332 | static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL); | |
333 | ||
19c26239 AS |
334 | static ssize_t |
335 | show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf) | |
336 | { | |
fcc4a01e | 337 | return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000); |
19c26239 AS |
338 | } |
339 | ||
340 | static ssize_t | |
341 | set_autosuspend(struct device *dev, struct device_attribute *attr, | |
342 | const char *buf, size_t count) | |
343 | { | |
fcc4a01e | 344 | int value; |
19c26239 | 345 | |
fcc4a01e AS |
346 | if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 || |
347 | value <= -INT_MAX/1000) | |
19c26239 | 348 | return -EINVAL; |
19c26239 | 349 | |
fcc4a01e | 350 | pm_runtime_set_autosuspend_delay(dev, value * 1000); |
19c26239 AS |
351 | return count; |
352 | } | |
353 | ||
354 | static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR, | |
355 | show_autosuspend, set_autosuspend); | |
356 | ||
2add5229 AS |
357 | static const char on_string[] = "on"; |
358 | static const char auto_string[] = "auto"; | |
2add5229 | 359 | |
a9030986 AS |
360 | static void warn_level(void) { |
361 | static int level_warned; | |
362 | ||
363 | if (!level_warned) { | |
364 | level_warned = 1; | |
365 | printk(KERN_WARNING "WARNING! power/level is deprecated; " | |
366 | "use power/control instead\n"); | |
367 | } | |
368 | } | |
369 | ||
2add5229 AS |
370 | static ssize_t |
371 | show_level(struct device *dev, struct device_attribute *attr, char *buf) | |
372 | { | |
373 | struct usb_device *udev = to_usb_device(dev); | |
374 | const char *p = auto_string; | |
375 | ||
a9030986 | 376 | warn_level(); |
9e18c821 | 377 | if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto) |
8e4ceb38 | 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; | |
9e18c821 | 389 | int rc = count; |
2add5229 | 390 | |
a9030986 | 391 | warn_level(); |
2add5229 AS |
392 | cp = memchr(buf, '\n', count); |
393 | if (cp) | |
394 | len = cp - buf; | |
395 | ||
396 | usb_lock_device(udev); | |
397 | ||
2add5229 | 398 | if (len == sizeof on_string - 1 && |
088f7fec | 399 | strncmp(buf, on_string, len) == 0) |
9e18c821 | 400 | usb_disable_autosuspend(udev); |
2add5229 | 401 | |
088f7fec AS |
402 | else if (len == sizeof auto_string - 1 && |
403 | strncmp(buf, auto_string, len) == 0) | |
9e18c821 | 404 | usb_enable_autosuspend(udev); |
2add5229 | 405 | |
088f7fec | 406 | else |
2add5229 AS |
407 | rc = -EINVAL; |
408 | ||
409 | usb_unlock_device(udev); | |
9e18c821 | 410 | return rc; |
2add5229 AS |
411 | } |
412 | ||
413 | static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level); | |
414 | ||
045cac6b AS |
415 | static struct attribute *power_attrs[] = { |
416 | &dev_attr_autosuspend.attr, | |
417 | &dev_attr_level.attr, | |
418 | &dev_attr_connected_duration.attr, | |
419 | &dev_attr_active_duration.attr, | |
420 | NULL, | |
421 | }; | |
422 | static struct attribute_group power_attr_group = { | |
423 | .name = power_group_name, | |
424 | .attrs = power_attrs, | |
425 | }; | |
426 | ||
19c26239 AS |
427 | static int add_power_attributes(struct device *dev) |
428 | { | |
429 | int rc = 0; | |
430 | ||
045cac6b AS |
431 | if (is_usb_device(dev)) |
432 | rc = sysfs_merge_group(&dev->kobj, &power_attr_group); | |
19c26239 AS |
433 | return rc; |
434 | } | |
435 | ||
436 | static void remove_power_attributes(struct device *dev) | |
437 | { | |
045cac6b | 438 | sysfs_unmerge_group(&dev->kobj, &power_attr_group); |
19c26239 AS |
439 | } |
440 | ||
441 | #else | |
442 | ||
443 | #define add_power_attributes(dev) 0 | |
444 | #define remove_power_attributes(dev) do {} while (0) | |
445 | ||
446 | #endif /* CONFIG_USB_SUSPEND */ | |
447 | ||
b41a60ec | 448 | |
1da177e4 LT |
449 | /* Descriptor fields */ |
450 | #define usb_descriptor_attr_le16(field, format_string) \ | |
451 | static ssize_t \ | |
9251644a | 452 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 453 | char *buf) \ |
1da177e4 LT |
454 | { \ |
455 | struct usb_device *udev; \ | |
456 | \ | |
9251644a ON |
457 | udev = to_usb_device(dev); \ |
458 | return sprintf(buf, format_string, \ | |
1da177e4 LT |
459 | le16_to_cpu(udev->descriptor.field)); \ |
460 | } \ | |
461 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
462 | ||
463 | usb_descriptor_attr_le16(idVendor, "%04x\n") | |
464 | usb_descriptor_attr_le16(idProduct, "%04x\n") | |
465 | usb_descriptor_attr_le16(bcdDevice, "%04x\n") | |
466 | ||
467 | #define usb_descriptor_attr(field, format_string) \ | |
468 | static ssize_t \ | |
9251644a | 469 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 470 | char *buf) \ |
1da177e4 LT |
471 | { \ |
472 | struct usb_device *udev; \ | |
473 | \ | |
9251644a ON |
474 | udev = to_usb_device(dev); \ |
475 | return sprintf(buf, format_string, udev->descriptor.field); \ | |
1da177e4 LT |
476 | } \ |
477 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
478 | ||
9251644a ON |
479 | usb_descriptor_attr(bDeviceClass, "%02x\n") |
480 | usb_descriptor_attr(bDeviceSubClass, "%02x\n") | |
481 | usb_descriptor_attr(bDeviceProtocol, "%02x\n") | |
482 | usb_descriptor_attr(bNumConfigurations, "%d\n") | |
483 | usb_descriptor_attr(bMaxPacketSize0, "%d\n") | |
1da177e4 | 484 | |
e03f2e8a IPG |
485 | |
486 | ||
487 | /* show if the device is authorized (1) or not (0) */ | |
488 | static ssize_t usb_dev_authorized_show(struct device *dev, | |
489 | struct device_attribute *attr, | |
490 | char *buf) | |
491 | { | |
492 | struct usb_device *usb_dev = to_usb_device(dev); | |
493 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); | |
494 | } | |
495 | ||
496 | ||
497 | /* | |
498 | * Authorize a device to be used in the system | |
499 | * | |
500 | * Writing a 0 deauthorizes the device, writing a 1 authorizes it. | |
501 | */ | |
502 | static ssize_t usb_dev_authorized_store(struct device *dev, | |
503 | struct device_attribute *attr, | |
504 | const char *buf, size_t size) | |
505 | { | |
506 | ssize_t result; | |
507 | struct usb_device *usb_dev = to_usb_device(dev); | |
508 | unsigned val; | |
509 | result = sscanf(buf, "%u\n", &val); | |
510 | if (result != 1) | |
511 | result = -EINVAL; | |
512 | else if (val == 0) | |
513 | result = usb_deauthorize_device(usb_dev); | |
514 | else | |
515 | result = usb_authorize_device(usb_dev); | |
516 | return result < 0? result : size; | |
517 | } | |
518 | ||
519 | static DEVICE_ATTR(authorized, 0644, | |
520 | usb_dev_authorized_show, usb_dev_authorized_store); | |
521 | ||
253e0572 AS |
522 | /* "Safely remove a device" */ |
523 | static ssize_t usb_remove_store(struct device *dev, | |
524 | struct device_attribute *attr, | |
525 | const char *buf, size_t count) | |
526 | { | |
527 | struct usb_device *udev = to_usb_device(dev); | |
528 | int rc = 0; | |
529 | ||
530 | usb_lock_device(udev); | |
531 | if (udev->state != USB_STATE_NOTATTACHED) { | |
532 | ||
533 | /* To avoid races, first unconfigure and then remove */ | |
534 | usb_set_configuration(udev, -1); | |
535 | rc = usb_remove_device(udev); | |
536 | } | |
537 | if (rc == 0) | |
538 | rc = count; | |
539 | usb_unlock_device(udev); | |
540 | return rc; | |
541 | } | |
542 | static DEVICE_ATTR(remove, 0200, NULL, usb_remove_store); | |
543 | ||
e03f2e8a | 544 | |
1da177e4 LT |
545 | static struct attribute *dev_attrs[] = { |
546 | /* current configuration's attributes */ | |
b6eb2d84 | 547 | &dev_attr_configuration.attr, |
1da177e4 LT |
548 | &dev_attr_bNumInterfaces.attr, |
549 | &dev_attr_bConfigurationValue.attr, | |
550 | &dev_attr_bmAttributes.attr, | |
551 | &dev_attr_bMaxPower.attr, | |
552 | /* device attributes */ | |
9af23624 | 553 | &dev_attr_urbnum.attr, |
1da177e4 LT |
554 | &dev_attr_idVendor.attr, |
555 | &dev_attr_idProduct.attr, | |
556 | &dev_attr_bcdDevice.attr, | |
557 | &dev_attr_bDeviceClass.attr, | |
558 | &dev_attr_bDeviceSubClass.attr, | |
559 | &dev_attr_bDeviceProtocol.attr, | |
560 | &dev_attr_bNumConfigurations.attr, | |
cf5910bb | 561 | &dev_attr_bMaxPacketSize0.attr, |
1da177e4 | 562 | &dev_attr_speed.attr, |
83f7d958 | 563 | &dev_attr_busnum.attr, |
1da177e4 | 564 | &dev_attr_devnum.attr, |
9af23624 | 565 | &dev_attr_devpath.attr, |
1da177e4 LT |
566 | &dev_attr_version.attr, |
567 | &dev_attr_maxchild.attr, | |
7ceec1f1 | 568 | &dev_attr_quirks.attr, |
ef955341 | 569 | &dev_attr_avoid_reset_quirk.attr, |
e03f2e8a | 570 | &dev_attr_authorized.attr, |
253e0572 | 571 | &dev_attr_remove.attr, |
1da177e4 LT |
572 | NULL, |
573 | }; | |
574 | static struct attribute_group dev_attr_grp = { | |
575 | .attrs = dev_attrs, | |
576 | }; | |
577 | ||
2e5f10e4 AS |
578 | /* When modifying this list, be sure to modify dev_string_attrs_are_visible() |
579 | * accordingly. | |
580 | */ | |
581 | static struct attribute *dev_string_attrs[] = { | |
582 | &dev_attr_manufacturer.attr, | |
583 | &dev_attr_product.attr, | |
584 | &dev_attr_serial.attr, | |
585 | NULL | |
586 | }; | |
587 | ||
588 | static mode_t dev_string_attrs_are_visible(struct kobject *kobj, | |
589 | struct attribute *a, int n) | |
590 | { | |
a864e3aa HS |
591 | struct device *dev = container_of(kobj, struct device, kobj); |
592 | struct usb_device *udev = to_usb_device(dev); | |
2e5f10e4 AS |
593 | |
594 | if (a == &dev_attr_manufacturer.attr) { | |
595 | if (udev->manufacturer == NULL) | |
596 | return 0; | |
597 | } else if (a == &dev_attr_product.attr) { | |
598 | if (udev->product == NULL) | |
599 | return 0; | |
600 | } else if (a == &dev_attr_serial.attr) { | |
601 | if (udev->serial == NULL) | |
602 | return 0; | |
603 | } | |
604 | return a->mode; | |
605 | } | |
606 | ||
607 | static struct attribute_group dev_string_attr_grp = { | |
608 | .attrs = dev_string_attrs, | |
609 | .is_visible = dev_string_attrs_are_visible, | |
610 | }; | |
611 | ||
a4dbd674 | 612 | const struct attribute_group *usb_device_groups[] = { |
2e5f10e4 AS |
613 | &dev_attr_grp, |
614 | &dev_string_attr_grp, | |
615 | NULL | |
616 | }; | |
617 | ||
69d42a78 AS |
618 | /* Binary descriptors */ |
619 | ||
620 | static ssize_t | |
2c3c8bea CW |
621 | read_descriptors(struct file *filp, struct kobject *kobj, |
622 | struct bin_attribute *attr, | |
69d42a78 AS |
623 | char *buf, loff_t off, size_t count) |
624 | { | |
a864e3aa HS |
625 | struct device *dev = container_of(kobj, struct device, kobj); |
626 | struct usb_device *udev = to_usb_device(dev); | |
69d42a78 AS |
627 | size_t nleft = count; |
628 | size_t srclen, n; | |
217a9081 AS |
629 | int cfgno; |
630 | void *src; | |
69d42a78 | 631 | |
217a9081 AS |
632 | /* The binary attribute begins with the device descriptor. |
633 | * Following that are the raw descriptor entries for all the | |
634 | * configurations (config plus subsidiary descriptors). | |
69d42a78 | 635 | */ |
217a9081 AS |
636 | for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations && |
637 | nleft > 0; ++cfgno) { | |
638 | if (cfgno < 0) { | |
639 | src = &udev->descriptor; | |
640 | srclen = sizeof(struct usb_device_descriptor); | |
641 | } else { | |
642 | src = udev->rawdescriptors[cfgno]; | |
643 | srclen = __le16_to_cpu(udev->config[cfgno].desc. | |
644 | wTotalLength); | |
645 | } | |
69d42a78 | 646 | if (off < srclen) { |
217a9081 AS |
647 | n = min(nleft, srclen - (size_t) off); |
648 | memcpy(buf, src + off, n); | |
69d42a78 | 649 | nleft -= n; |
217a9081 AS |
650 | buf += n; |
651 | off = 0; | |
652 | } else { | |
653 | off -= srclen; | |
69d42a78 AS |
654 | } |
655 | } | |
69d42a78 AS |
656 | return count - nleft; |
657 | } | |
658 | ||
659 | static struct bin_attribute dev_bin_attr_descriptors = { | |
660 | .attr = {.name = "descriptors", .mode = 0444}, | |
661 | .read = read_descriptors, | |
662 | .size = 18 + 65535, /* dev descr + max-size raw descriptor */ | |
663 | }; | |
664 | ||
1b21d5e1 | 665 | int usb_create_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
666 | { |
667 | struct device *dev = &udev->dev; | |
1b21d5e1 | 668 | int retval; |
1da177e4 | 669 | |
69d42a78 AS |
670 | retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); |
671 | if (retval) | |
672 | goto error; | |
673 | ||
b41a60ec AS |
674 | retval = add_persist_attributes(dev); |
675 | if (retval) | |
676 | goto error; | |
677 | ||
19c26239 AS |
678 | retval = add_power_attributes(dev); |
679 | if (retval) | |
680 | goto error; | |
3b23dd6f | 681 | return retval; |
1b21d5e1 | 682 | error: |
aa084f3e | 683 | usb_remove_sysfs_dev_files(udev); |
1b21d5e1 | 684 | return retval; |
1da177e4 LT |
685 | } |
686 | ||
9251644a | 687 | void usb_remove_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
688 | { |
689 | struct device *dev = &udev->dev; | |
690 | ||
19c26239 | 691 | remove_power_attributes(dev); |
b41a60ec | 692 | remove_persist_attributes(dev); |
69d42a78 | 693 | device_remove_bin_file(dev, &dev_bin_attr_descriptors); |
1da177e4 LT |
694 | } |
695 | ||
165fe97e CN |
696 | /* Interface Accociation Descriptor fields */ |
697 | #define usb_intf_assoc_attr(field, format_string) \ | |
698 | static ssize_t \ | |
2c044a48 | 699 | show_iad_##field(struct device *dev, struct device_attribute *attr, \ |
165fe97e CN |
700 | char *buf) \ |
701 | { \ | |
2c044a48 | 702 | struct usb_interface *intf = to_usb_interface(dev); \ |
165fe97e | 703 | \ |
2c044a48 GKH |
704 | return sprintf(buf, format_string, \ |
705 | intf->intf_assoc->field); \ | |
165fe97e CN |
706 | } \ |
707 | static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL); | |
708 | ||
2c044a48 GKH |
709 | usb_intf_assoc_attr(bFirstInterface, "%02x\n") |
710 | usb_intf_assoc_attr(bInterfaceCount, "%02d\n") | |
711 | usb_intf_assoc_attr(bFunctionClass, "%02x\n") | |
712 | usb_intf_assoc_attr(bFunctionSubClass, "%02x\n") | |
713 | usb_intf_assoc_attr(bFunctionProtocol, "%02x\n") | |
165fe97e | 714 | |
1da177e4 LT |
715 | /* Interface fields */ |
716 | #define usb_intf_attr(field, format_string) \ | |
717 | static ssize_t \ | |
9251644a | 718 | show_##field(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 719 | char *buf) \ |
1da177e4 | 720 | { \ |
9251644a | 721 | struct usb_interface *intf = to_usb_interface(dev); \ |
1da177e4 | 722 | \ |
9251644a | 723 | return sprintf(buf, format_string, \ |
b724ae77 | 724 | intf->cur_altsetting->desc.field); \ |
1da177e4 LT |
725 | } \ |
726 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
727 | ||
9251644a ON |
728 | usb_intf_attr(bInterfaceNumber, "%02x\n") |
729 | usb_intf_attr(bAlternateSetting, "%2d\n") | |
730 | usb_intf_attr(bNumEndpoints, "%02x\n") | |
731 | usb_intf_attr(bInterfaceClass, "%02x\n") | |
732 | usb_intf_attr(bInterfaceSubClass, "%02x\n") | |
733 | usb_intf_attr(bInterfaceProtocol, "%02x\n") | |
1da177e4 | 734 | |
b724ae77 AS |
735 | static ssize_t show_interface_string(struct device *dev, |
736 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
737 | { |
738 | struct usb_interface *intf; | |
2e5f10e4 | 739 | char *string; |
1da177e4 | 740 | |
9251644a | 741 | intf = to_usb_interface(dev); |
2e5f10e4 AS |
742 | string = intf->cur_altsetting->string; |
743 | barrier(); /* The altsetting might change! */ | |
744 | ||
745 | if (!string) | |
1da177e4 | 746 | return 0; |
2e5f10e4 | 747 | return sprintf(buf, "%s\n", string); |
1da177e4 LT |
748 | } |
749 | static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL); | |
750 | ||
b724ae77 AS |
751 | static ssize_t show_modalias(struct device *dev, |
752 | struct device_attribute *attr, char *buf) | |
360b52b0 GK |
753 | { |
754 | struct usb_interface *intf; | |
755 | struct usb_device *udev; | |
7521803d | 756 | struct usb_host_interface *alt; |
360b52b0 GK |
757 | |
758 | intf = to_usb_interface(dev); | |
759 | udev = interface_to_usbdev(intf); | |
7521803d GKH |
760 | alt = intf->cur_altsetting; |
761 | ||
762 | return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" | |
763 | "ic%02Xisc%02Xip%02X\n", | |
764 | le16_to_cpu(udev->descriptor.idVendor), | |
765 | le16_to_cpu(udev->descriptor.idProduct), | |
766 | le16_to_cpu(udev->descriptor.bcdDevice), | |
767 | udev->descriptor.bDeviceClass, | |
768 | udev->descriptor.bDeviceSubClass, | |
769 | udev->descriptor.bDeviceProtocol, | |
770 | alt->desc.bInterfaceClass, | |
771 | alt->desc.bInterfaceSubClass, | |
772 | alt->desc.bInterfaceProtocol); | |
360b52b0 GK |
773 | } |
774 | static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); | |
775 | ||
49e7cc84 SS |
776 | static ssize_t show_supports_autosuspend(struct device *dev, |
777 | struct device_attribute *attr, char *buf) | |
778 | { | |
779 | struct usb_interface *intf; | |
780 | struct usb_device *udev; | |
781 | int ret; | |
782 | ||
783 | intf = to_usb_interface(dev); | |
784 | udev = interface_to_usbdev(intf); | |
785 | ||
786 | usb_lock_device(udev); | |
787 | /* Devices will be autosuspended even when an interface isn't claimed */ | |
788 | if (!intf->dev.driver || | |
789 | to_usb_driver(intf->dev.driver)->supports_autosuspend) | |
790 | ret = sprintf(buf, "%u\n", 1); | |
791 | else | |
792 | ret = sprintf(buf, "%u\n", 0); | |
793 | usb_unlock_device(udev); | |
794 | ||
795 | return ret; | |
796 | } | |
797 | static DEVICE_ATTR(supports_autosuspend, S_IRUGO, show_supports_autosuspend, NULL); | |
798 | ||
1da177e4 LT |
799 | static struct attribute *intf_attrs[] = { |
800 | &dev_attr_bInterfaceNumber.attr, | |
801 | &dev_attr_bAlternateSetting.attr, | |
802 | &dev_attr_bNumEndpoints.attr, | |
803 | &dev_attr_bInterfaceClass.attr, | |
804 | &dev_attr_bInterfaceSubClass.attr, | |
805 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 806 | &dev_attr_modalias.attr, |
49e7cc84 | 807 | &dev_attr_supports_autosuspend.attr, |
1da177e4 LT |
808 | NULL, |
809 | }; | |
810 | static struct attribute_group intf_attr_grp = { | |
811 | .attrs = intf_attrs, | |
812 | }; | |
813 | ||
2e5f10e4 AS |
814 | static struct attribute *intf_assoc_attrs[] = { |
815 | &dev_attr_iad_bFirstInterface.attr, | |
816 | &dev_attr_iad_bInterfaceCount.attr, | |
817 | &dev_attr_iad_bFunctionClass.attr, | |
818 | &dev_attr_iad_bFunctionSubClass.attr, | |
819 | &dev_attr_iad_bFunctionProtocol.attr, | |
820 | NULL, | |
821 | }; | |
822 | ||
823 | static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj, | |
824 | struct attribute *a, int n) | |
825 | { | |
a864e3aa HS |
826 | struct device *dev = container_of(kobj, struct device, kobj); |
827 | struct usb_interface *intf = to_usb_interface(dev); | |
2e5f10e4 AS |
828 | |
829 | if (intf->intf_assoc == NULL) | |
830 | return 0; | |
831 | return a->mode; | |
832 | } | |
833 | ||
834 | static struct attribute_group intf_assoc_attr_grp = { | |
835 | .attrs = intf_assoc_attrs, | |
836 | .is_visible = intf_assoc_attrs_are_visible, | |
837 | }; | |
838 | ||
a4dbd674 | 839 | const struct attribute_group *usb_interface_groups[] = { |
2e5f10e4 AS |
840 | &intf_attr_grp, |
841 | &intf_assoc_attr_grp, | |
842 | NULL | |
843 | }; | |
844 | ||
643de624 | 845 | void usb_create_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 846 | { |
4f62efe6 AS |
847 | struct usb_device *udev = interface_to_usbdev(intf); |
848 | struct usb_host_interface *alt = intf->cur_altsetting; | |
849 | ||
352d0263 | 850 | if (intf->sysfs_files_created || intf->unregistering) |
643de624 | 851 | return; |
1da177e4 | 852 | |
643de624 | 853 | if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS)) |
4f62efe6 | 854 | alt->string = usb_cache_string(udev, alt->desc.iInterface); |
643de624 MN |
855 | if (alt->string && device_create_file(&intf->dev, &dev_attr_interface)) |
856 | ; /* We don't actually care if the function fails. */ | |
7e61559f | 857 | intf->sysfs_files_created = 1; |
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 | } |