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 */ | |
8d8479db | 20 | #define usb_actconfig_show(field, format_string) \ |
d03f254f GKH |
21 | static ssize_t field##_show(struct device *dev, \ |
22 | struct device_attribute *attr, char *buf) \ | |
1da177e4 LT |
23 | { \ |
24 | struct usb_device *udev; \ | |
25 | struct usb_host_config *actconfig; \ | |
7dd9cba5 | 26 | ssize_t rc; \ |
1da177e4 | 27 | \ |
9251644a | 28 | udev = to_usb_device(dev); \ |
7dd9cba5 ON |
29 | rc = usb_lock_device_interruptible(udev); \ |
30 | if (rc < 0) \ | |
31 | return -EINTR; \ | |
1da177e4 LT |
32 | actconfig = udev->actconfig; \ |
33 | if (actconfig) \ | |
232275a0 | 34 | rc = sprintf(buf, format_string, \ |
8d8479db | 35 | actconfig->desc.field); \ |
232275a0 AS |
36 | usb_unlock_device(udev); \ |
37 | return rc; \ | |
1da177e4 LT |
38 | } \ |
39 | ||
8d8479db SAS |
40 | #define usb_actconfig_attr(field, format_string) \ |
41 | usb_actconfig_show(field, format_string) \ | |
d03f254f | 42 | static DEVICE_ATTR_RO(field) |
1da177e4 | 43 | |
d03f254f GKH |
44 | usb_actconfig_attr(bNumInterfaces, "%2d\n"); |
45 | usb_actconfig_attr(bmAttributes, "%2x\n"); | |
8d8479db | 46 | |
d03f254f | 47 | static ssize_t bMaxPower_show(struct device *dev, |
8d8479db SAS |
48 | struct device_attribute *attr, char *buf) |
49 | { | |
50 | struct usb_device *udev; | |
51 | struct usb_host_config *actconfig; | |
7dd9cba5 | 52 | ssize_t rc; |
8d8479db SAS |
53 | |
54 | udev = to_usb_device(dev); | |
7dd9cba5 ON |
55 | rc = usb_lock_device_interruptible(udev); |
56 | if (rc < 0) | |
57 | return -EINTR; | |
8d8479db | 58 | actconfig = udev->actconfig; |
232275a0 AS |
59 | if (actconfig) |
60 | rc = sprintf(buf, "%dmA\n", usb_get_max_power(udev, actconfig)); | |
61 | usb_unlock_device(udev); | |
62 | return rc; | |
8d8479db | 63 | } |
d03f254f | 64 | static DEVICE_ATTR_RO(bMaxPower); |
1da177e4 | 65 | |
d03f254f | 66 | static ssize_t configuration_show(struct device *dev, |
b724ae77 | 67 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
68 | { |
69 | struct usb_device *udev; | |
70 | struct usb_host_config *actconfig; | |
7dd9cba5 | 71 | ssize_t rc; |
1da177e4 | 72 | |
9251644a | 73 | udev = to_usb_device(dev); |
7dd9cba5 ON |
74 | rc = usb_lock_device_interruptible(udev); |
75 | if (rc < 0) | |
76 | return -EINTR; | |
1da177e4 | 77 | actconfig = udev->actconfig; |
232275a0 AS |
78 | if (actconfig && actconfig->string) |
79 | rc = sprintf(buf, "%s\n", actconfig->string); | |
80 | usb_unlock_device(udev); | |
81 | return rc; | |
1da177e4 | 82 | } |
d03f254f | 83 | static DEVICE_ATTR_RO(configuration); |
1da177e4 LT |
84 | |
85 | /* configuration value is always present, and r/w */ | |
8d8479db | 86 | usb_actconfig_show(bConfigurationValue, "%u\n"); |
1da177e4 | 87 | |
d03f254f GKH |
88 | static ssize_t bConfigurationValue_store(struct device *dev, |
89 | struct device_attribute *attr, | |
90 | const char *buf, size_t count) | |
1da177e4 | 91 | { |
9251644a | 92 | struct usb_device *udev = to_usb_device(dev); |
7dd9cba5 | 93 | int config, value, rc; |
1da177e4 | 94 | |
3f141e2a | 95 | if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255) |
1da177e4 | 96 | return -EINVAL; |
7dd9cba5 ON |
97 | rc = usb_lock_device_interruptible(udev); |
98 | if (rc < 0) | |
99 | return -EINTR; | |
9251644a | 100 | value = usb_set_configuration(udev, config); |
1da177e4 LT |
101 | usb_unlock_device(udev); |
102 | return (value < 0) ? value : count; | |
103 | } | |
356c05d5 | 104 | static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR, |
d03f254f | 105 | bConfigurationValue_show, bConfigurationValue_store); |
1da177e4 LT |
106 | |
107 | /* String fields */ | |
108 | #define usb_string_attr(name) \ | |
d03f254f | 109 | static ssize_t name##_show(struct device *dev, \ |
b724ae77 | 110 | struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
111 | { \ |
112 | struct usb_device *udev; \ | |
da307123 | 113 | int retval; \ |
1da177e4 | 114 | \ |
9251644a | 115 | udev = to_usb_device(dev); \ |
7dd9cba5 ON |
116 | retval = usb_lock_device_interruptible(udev); \ |
117 | if (retval < 0) \ | |
118 | return -EINTR; \ | |
da307123 AS |
119 | retval = sprintf(buf, "%s\n", udev->name); \ |
120 | usb_unlock_device(udev); \ | |
121 | return retval; \ | |
1da177e4 | 122 | } \ |
d03f254f | 123 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
124 | |
125 | usb_string_attr(product); | |
126 | usb_string_attr(manufacturer); | |
127 | usb_string_attr(serial); | |
128 | ||
d03f254f GKH |
129 | static ssize_t speed_show(struct device *dev, struct device_attribute *attr, |
130 | char *buf) | |
1da177e4 LT |
131 | { |
132 | struct usb_device *udev; | |
133 | char *speed; | |
134 | ||
9251644a | 135 | udev = to_usb_device(dev); |
1da177e4 LT |
136 | |
137 | switch (udev->speed) { | |
138 | case USB_SPEED_LOW: | |
139 | speed = "1.5"; | |
140 | break; | |
141 | case USB_SPEED_UNKNOWN: | |
142 | case USB_SPEED_FULL: | |
143 | speed = "12"; | |
144 | break; | |
145 | case USB_SPEED_HIGH: | |
146 | speed = "480"; | |
147 | break; | |
551cdbbe | 148 | case USB_SPEED_WIRELESS: |
b132b04e GKH |
149 | speed = "480"; |
150 | break; | |
151 | case USB_SPEED_SUPER: | |
152 | speed = "5000"; | |
153 | break; | |
b2316645 MN |
154 | case USB_SPEED_SUPER_PLUS: |
155 | speed = "10000"; | |
156 | break; | |
1da177e4 LT |
157 | default: |
158 | speed = "unknown"; | |
159 | } | |
9251644a | 160 | return sprintf(buf, "%s\n", speed); |
1da177e4 | 161 | } |
d03f254f | 162 | static DEVICE_ATTR_RO(speed); |
1da177e4 | 163 | |
d03f254f GKH |
164 | static ssize_t busnum_show(struct device *dev, struct device_attribute *attr, |
165 | char *buf) | |
83f7d958 AS |
166 | { |
167 | struct usb_device *udev; | |
168 | ||
169 | udev = to_usb_device(dev); | |
170 | return sprintf(buf, "%d\n", udev->bus->busnum); | |
171 | } | |
d03f254f | 172 | static DEVICE_ATTR_RO(busnum); |
83f7d958 | 173 | |
d03f254f GKH |
174 | static ssize_t devnum_show(struct device *dev, struct device_attribute *attr, |
175 | char *buf) | |
1da177e4 LT |
176 | { |
177 | struct usb_device *udev; | |
178 | ||
9251644a ON |
179 | udev = to_usb_device(dev); |
180 | return sprintf(buf, "%d\n", udev->devnum); | |
1da177e4 | 181 | } |
d03f254f | 182 | static DEVICE_ATTR_RO(devnum); |
1da177e4 | 183 | |
d03f254f GKH |
184 | static ssize_t devpath_show(struct device *dev, struct device_attribute *attr, |
185 | char *buf) | |
9af23624 GKH |
186 | { |
187 | struct usb_device *udev; | |
188 | ||
189 | udev = to_usb_device(dev); | |
190 | return sprintf(buf, "%s\n", udev->devpath); | |
191 | } | |
d03f254f | 192 | static DEVICE_ATTR_RO(devpath); |
9af23624 | 193 | |
d03f254f GKH |
194 | static ssize_t version_show(struct device *dev, struct device_attribute *attr, |
195 | char *buf) | |
1da177e4 LT |
196 | { |
197 | struct usb_device *udev; | |
198 | u16 bcdUSB; | |
199 | ||
200 | udev = to_usb_device(dev); | |
201 | bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); | |
202 | return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); | |
203 | } | |
d03f254f | 204 | static DEVICE_ATTR_RO(version); |
1da177e4 | 205 | |
d03f254f GKH |
206 | static ssize_t maxchild_show(struct device *dev, struct device_attribute *attr, |
207 | char *buf) | |
1da177e4 LT |
208 | { |
209 | struct usb_device *udev; | |
210 | ||
9251644a ON |
211 | udev = to_usb_device(dev); |
212 | return sprintf(buf, "%d\n", udev->maxchild); | |
1da177e4 | 213 | } |
d03f254f | 214 | static DEVICE_ATTR_RO(maxchild); |
1da177e4 | 215 | |
d03f254f GKH |
216 | static ssize_t quirks_show(struct device *dev, struct device_attribute *attr, |
217 | char *buf) | |
7ceec1f1 ON |
218 | { |
219 | struct usb_device *udev; | |
220 | ||
221 | udev = to_usb_device(dev); | |
222 | return sprintf(buf, "0x%x\n", udev->quirks); | |
223 | } | |
d03f254f | 224 | static DEVICE_ATTR_RO(quirks); |
7ceec1f1 | 225 | |
d03f254f GKH |
226 | static ssize_t avoid_reset_quirk_show(struct device *dev, |
227 | struct device_attribute *attr, char *buf) | |
ef955341 ON |
228 | { |
229 | struct usb_device *udev; | |
230 | ||
231 | udev = to_usb_device(dev); | |
7fda953f | 232 | return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET)); |
ef955341 ON |
233 | } |
234 | ||
d03f254f GKH |
235 | static ssize_t avoid_reset_quirk_store(struct device *dev, |
236 | struct device_attribute *attr, | |
237 | const char *buf, size_t count) | |
ef955341 ON |
238 | { |
239 | struct usb_device *udev = to_usb_device(dev); | |
7dd9cba5 | 240 | int val, rc; |
ef955341 | 241 | |
7fc2cc32 | 242 | if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1) |
ef955341 | 243 | return -EINVAL; |
7dd9cba5 ON |
244 | rc = usb_lock_device_interruptible(udev); |
245 | if (rc < 0) | |
246 | return -EINTR; | |
7fc2cc32 | 247 | if (val) |
7fda953f | 248 | udev->quirks |= USB_QUIRK_RESET; |
ef955341 | 249 | else |
7fda953f | 250 | udev->quirks &= ~USB_QUIRK_RESET; |
ef955341 ON |
251 | usb_unlock_device(udev); |
252 | return count; | |
253 | } | |
d03f254f | 254 | static DEVICE_ATTR_RW(avoid_reset_quirk); |
ef955341 | 255 | |
d03f254f GKH |
256 | static ssize_t urbnum_show(struct device *dev, struct device_attribute *attr, |
257 | char *buf) | |
4d59d8a1 SS |
258 | { |
259 | struct usb_device *udev; | |
260 | ||
261 | udev = to_usb_device(dev); | |
262 | return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); | |
263 | } | |
d03f254f | 264 | static DEVICE_ATTR_RO(urbnum); |
4d59d8a1 | 265 | |
d03f254f GKH |
266 | static ssize_t removable_show(struct device *dev, struct device_attribute *attr, |
267 | char *buf) | |
0846e7e9 MG |
268 | { |
269 | struct usb_device *udev; | |
270 | char *state; | |
271 | ||
272 | udev = to_usb_device(dev); | |
273 | ||
274 | switch (udev->removable) { | |
275 | case USB_DEVICE_REMOVABLE: | |
276 | state = "removable"; | |
277 | break; | |
278 | case USB_DEVICE_FIXED: | |
279 | state = "fixed"; | |
280 | break; | |
281 | default: | |
282 | state = "unknown"; | |
283 | } | |
284 | ||
285 | return sprintf(buf, "%s\n", state); | |
286 | } | |
d03f254f | 287 | static DEVICE_ATTR_RO(removable); |
b41a60ec | 288 | |
d03f254f GKH |
289 | static ssize_t ltm_capable_show(struct device *dev, |
290 | struct device_attribute *attr, char *buf) | |
024f117c SS |
291 | { |
292 | if (usb_device_supports_ltm(to_usb_device(dev))) | |
293 | return sprintf(buf, "%s\n", "yes"); | |
294 | return sprintf(buf, "%s\n", "no"); | |
295 | } | |
d03f254f | 296 | static DEVICE_ATTR_RO(ltm_capable); |
024f117c | 297 | |
feccc30d | 298 | #ifdef CONFIG_PM |
b41a60ec | 299 | |
d03f254f GKH |
300 | static ssize_t persist_show(struct device *dev, struct device_attribute *attr, |
301 | char *buf) | |
b41a60ec AS |
302 | { |
303 | struct usb_device *udev = to_usb_device(dev); | |
304 | ||
305 | return sprintf(buf, "%d\n", udev->persist_enabled); | |
306 | } | |
307 | ||
d03f254f GKH |
308 | static ssize_t persist_store(struct device *dev, struct device_attribute *attr, |
309 | const char *buf, size_t count) | |
b41a60ec AS |
310 | { |
311 | struct usb_device *udev = to_usb_device(dev); | |
7dd9cba5 | 312 | int value, rc; |
b41a60ec AS |
313 | |
314 | /* Hubs are always enabled for USB_PERSIST */ | |
315 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
316 | return -EPERM; | |
317 | ||
318 | if (sscanf(buf, "%d", &value) != 1) | |
319 | return -EINVAL; | |
0c4db6df | 320 | |
7dd9cba5 ON |
321 | rc = usb_lock_device_interruptible(udev); |
322 | if (rc < 0) | |
323 | return -EINTR; | |
b41a60ec | 324 | udev->persist_enabled = !!value; |
0c4db6df | 325 | usb_unlock_device(udev); |
b41a60ec AS |
326 | return count; |
327 | } | |
d03f254f | 328 | static DEVICE_ATTR_RW(persist); |
b41a60ec AS |
329 | |
330 | static int add_persist_attributes(struct device *dev) | |
331 | { | |
332 | int rc = 0; | |
333 | ||
334 | if (is_usb_device(dev)) { | |
335 | struct usb_device *udev = to_usb_device(dev); | |
336 | ||
feccc30d AS |
337 | /* Hubs are automatically enabled for USB_PERSIST, |
338 | * no point in creating the attribute file. | |
339 | */ | |
340 | if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) | |
341 | rc = sysfs_add_file_to_group(&dev->kobj, | |
342 | &dev_attr_persist.attr, | |
045cac6b | 343 | power_group_name); |
b41a60ec AS |
344 | } |
345 | return rc; | |
346 | } | |
347 | ||
348 | static void remove_persist_attributes(struct device *dev) | |
349 | { | |
350 | sysfs_remove_file_from_group(&dev->kobj, | |
351 | &dev_attr_persist.attr, | |
045cac6b | 352 | power_group_name); |
b41a60ec | 353 | } |
19c26239 | 354 | |
d03f254f GKH |
355 | static ssize_t connected_duration_show(struct device *dev, |
356 | struct device_attribute *attr, char *buf) | |
15123006 SS |
357 | { |
358 | struct usb_device *udev = to_usb_device(dev); | |
359 | ||
360 | return sprintf(buf, "%u\n", | |
361 | jiffies_to_msecs(jiffies - udev->connect_time)); | |
362 | } | |
d03f254f | 363 | static DEVICE_ATTR_RO(connected_duration); |
15123006 SS |
364 | |
365 | /* | |
366 | * If the device is resumed, the last time the device was suspended has | |
367 | * been pre-subtracted from active_duration. We add the current time to | |
368 | * get the duration that the device was actually active. | |
369 | * | |
370 | * If the device is suspended, the active_duration is up-to-date. | |
371 | */ | |
d03f254f GKH |
372 | static ssize_t active_duration_show(struct device *dev, |
373 | struct device_attribute *attr, char *buf) | |
15123006 SS |
374 | { |
375 | struct usb_device *udev = to_usb_device(dev); | |
376 | int duration; | |
377 | ||
378 | if (udev->state != USB_STATE_SUSPENDED) | |
379 | duration = jiffies_to_msecs(jiffies + udev->active_duration); | |
380 | else | |
381 | duration = jiffies_to_msecs(udev->active_duration); | |
382 | return sprintf(buf, "%u\n", duration); | |
383 | } | |
d03f254f | 384 | static DEVICE_ATTR_RO(active_duration); |
15123006 | 385 | |
d03f254f GKH |
386 | static ssize_t autosuspend_show(struct device *dev, |
387 | struct device_attribute *attr, char *buf) | |
19c26239 | 388 | { |
fcc4a01e | 389 | return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000); |
19c26239 AS |
390 | } |
391 | ||
d03f254f GKH |
392 | static ssize_t autosuspend_store(struct device *dev, |
393 | struct device_attribute *attr, const char *buf, | |
394 | size_t count) | |
19c26239 | 395 | { |
fcc4a01e | 396 | int value; |
19c26239 | 397 | |
fcc4a01e AS |
398 | if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 || |
399 | value <= -INT_MAX/1000) | |
19c26239 | 400 | return -EINVAL; |
19c26239 | 401 | |
fcc4a01e | 402 | pm_runtime_set_autosuspend_delay(dev, value * 1000); |
19c26239 AS |
403 | return count; |
404 | } | |
d03f254f | 405 | static DEVICE_ATTR_RW(autosuspend); |
19c26239 | 406 | |
2add5229 AS |
407 | static const char on_string[] = "on"; |
408 | static const char auto_string[] = "auto"; | |
2add5229 | 409 | |
469271f8 MB |
410 | static void warn_level(void) |
411 | { | |
a9030986 AS |
412 | static int level_warned; |
413 | ||
414 | if (!level_warned) { | |
415 | level_warned = 1; | |
416 | printk(KERN_WARNING "WARNING! power/level is deprecated; " | |
417 | "use power/control instead\n"); | |
418 | } | |
419 | } | |
420 | ||
d03f254f GKH |
421 | static ssize_t level_show(struct device *dev, struct device_attribute *attr, |
422 | char *buf) | |
2add5229 AS |
423 | { |
424 | struct usb_device *udev = to_usb_device(dev); | |
425 | const char *p = auto_string; | |
426 | ||
a9030986 | 427 | warn_level(); |
9e18c821 | 428 | if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto) |
8e4ceb38 | 429 | p = on_string; |
2add5229 AS |
430 | return sprintf(buf, "%s\n", p); |
431 | } | |
432 | ||
d03f254f GKH |
433 | static ssize_t level_store(struct device *dev, struct device_attribute *attr, |
434 | const char *buf, size_t count) | |
2add5229 AS |
435 | { |
436 | struct usb_device *udev = to_usb_device(dev); | |
437 | int len = count; | |
438 | char *cp; | |
9e18c821 | 439 | int rc = count; |
7dd9cba5 | 440 | int rv; |
2add5229 | 441 | |
a9030986 | 442 | warn_level(); |
2add5229 AS |
443 | cp = memchr(buf, '\n', count); |
444 | if (cp) | |
445 | len = cp - buf; | |
446 | ||
7dd9cba5 ON |
447 | rv = usb_lock_device_interruptible(udev); |
448 | if (rv < 0) | |
449 | return -EINTR; | |
2add5229 | 450 | |
2add5229 | 451 | if (len == sizeof on_string - 1 && |
088f7fec | 452 | strncmp(buf, on_string, len) == 0) |
9e18c821 | 453 | usb_disable_autosuspend(udev); |
2add5229 | 454 | |
088f7fec AS |
455 | else if (len == sizeof auto_string - 1 && |
456 | strncmp(buf, auto_string, len) == 0) | |
9e18c821 | 457 | usb_enable_autosuspend(udev); |
2add5229 | 458 | |
088f7fec | 459 | else |
2add5229 AS |
460 | rc = -EINVAL; |
461 | ||
462 | usb_unlock_device(udev); | |
9e18c821 | 463 | return rc; |
2add5229 | 464 | } |
d03f254f | 465 | static DEVICE_ATTR_RW(level); |
2add5229 | 466 | |
d03f254f GKH |
467 | static ssize_t usb2_hardware_lpm_show(struct device *dev, |
468 | struct device_attribute *attr, char *buf) | |
c1045e87 AX |
469 | { |
470 | struct usb_device *udev = to_usb_device(dev); | |
471 | const char *p; | |
472 | ||
de68bab4 | 473 | if (udev->usb2_hw_lpm_allowed == 1) |
c1045e87 AX |
474 | p = "enabled"; |
475 | else | |
476 | p = "disabled"; | |
477 | ||
478 | return sprintf(buf, "%s\n", p); | |
479 | } | |
480 | ||
d03f254f GKH |
481 | static ssize_t usb2_hardware_lpm_store(struct device *dev, |
482 | struct device_attribute *attr, | |
483 | const char *buf, size_t count) | |
c1045e87 AX |
484 | { |
485 | struct usb_device *udev = to_usb_device(dev); | |
486 | bool value; | |
487 | int ret; | |
488 | ||
7dd9cba5 ON |
489 | ret = usb_lock_device_interruptible(udev); |
490 | if (ret < 0) | |
491 | return -EINTR; | |
c1045e87 AX |
492 | |
493 | ret = strtobool(buf, &value); | |
494 | ||
de68bab4 SS |
495 | if (!ret) { |
496 | udev->usb2_hw_lpm_allowed = value; | |
c1045e87 | 497 | ret = usb_set_usb2_hardware_lpm(udev, value); |
de68bab4 | 498 | } |
c1045e87 AX |
499 | |
500 | usb_unlock_device(udev); | |
501 | ||
502 | if (!ret) | |
503 | return count; | |
504 | ||
505 | return ret; | |
506 | } | |
d03f254f | 507 | static DEVICE_ATTR_RW(usb2_hardware_lpm); |
c1045e87 | 508 | |
d03f254f GKH |
509 | static ssize_t usb2_lpm_l1_timeout_show(struct device *dev, |
510 | struct device_attribute *attr, | |
511 | char *buf) | |
17f34867 MN |
512 | { |
513 | struct usb_device *udev = to_usb_device(dev); | |
514 | return sprintf(buf, "%d\n", udev->l1_params.timeout); | |
515 | } | |
516 | ||
d03f254f GKH |
517 | static ssize_t usb2_lpm_l1_timeout_store(struct device *dev, |
518 | struct device_attribute *attr, | |
519 | const char *buf, size_t count) | |
17f34867 MN |
520 | { |
521 | struct usb_device *udev = to_usb_device(dev); | |
522 | u16 timeout; | |
523 | ||
524 | if (kstrtou16(buf, 0, &timeout)) | |
525 | return -EINVAL; | |
526 | ||
527 | udev->l1_params.timeout = timeout; | |
528 | ||
529 | return count; | |
530 | } | |
d03f254f | 531 | static DEVICE_ATTR_RW(usb2_lpm_l1_timeout); |
17f34867 | 532 | |
d03f254f GKH |
533 | static ssize_t usb2_lpm_besl_show(struct device *dev, |
534 | struct device_attribute *attr, char *buf) | |
17f34867 MN |
535 | { |
536 | struct usb_device *udev = to_usb_device(dev); | |
537 | return sprintf(buf, "%d\n", udev->l1_params.besl); | |
538 | } | |
539 | ||
d03f254f GKH |
540 | static ssize_t usb2_lpm_besl_store(struct device *dev, |
541 | struct device_attribute *attr, | |
542 | const char *buf, size_t count) | |
17f34867 MN |
543 | { |
544 | struct usb_device *udev = to_usb_device(dev); | |
545 | u8 besl; | |
546 | ||
547 | if (kstrtou8(buf, 0, &besl) || besl > 15) | |
548 | return -EINVAL; | |
549 | ||
550 | udev->l1_params.besl = besl; | |
551 | ||
552 | return count; | |
553 | } | |
d03f254f | 554 | static DEVICE_ATTR_RW(usb2_lpm_besl); |
17f34867 | 555 | |
bf5ce5bf | 556 | static ssize_t usb3_hardware_lpm_u1_show(struct device *dev, |
655fe4ef KS |
557 | struct device_attribute *attr, char *buf) |
558 | { | |
559 | struct usb_device *udev = to_usb_device(dev); | |
560 | const char *p; | |
7dd9cba5 | 561 | int rc; |
655fe4ef | 562 | |
7dd9cba5 ON |
563 | rc = usb_lock_device_interruptible(udev); |
564 | if (rc < 0) | |
565 | return -EINTR; | |
655fe4ef | 566 | |
bf5ce5bf | 567 | if (udev->usb3_lpm_u1_enabled) |
655fe4ef KS |
568 | p = "enabled"; |
569 | else | |
570 | p = "disabled"; | |
571 | ||
572 | usb_unlock_device(udev); | |
573 | ||
574 | return sprintf(buf, "%s\n", p); | |
575 | } | |
bf5ce5bf LB |
576 | static DEVICE_ATTR_RO(usb3_hardware_lpm_u1); |
577 | ||
578 | static ssize_t usb3_hardware_lpm_u2_show(struct device *dev, | |
579 | struct device_attribute *attr, char *buf) | |
580 | { | |
581 | struct usb_device *udev = to_usb_device(dev); | |
582 | const char *p; | |
7dd9cba5 | 583 | int rc; |
bf5ce5bf | 584 | |
7dd9cba5 ON |
585 | rc = usb_lock_device_interruptible(udev); |
586 | if (rc < 0) | |
587 | return -EINTR; | |
bf5ce5bf LB |
588 | |
589 | if (udev->usb3_lpm_u2_enabled) | |
590 | p = "enabled"; | |
591 | else | |
592 | p = "disabled"; | |
593 | ||
594 | usb_unlock_device(udev); | |
595 | ||
596 | return sprintf(buf, "%s\n", p); | |
597 | } | |
598 | static DEVICE_ATTR_RO(usb3_hardware_lpm_u2); | |
655fe4ef | 599 | |
c1045e87 AX |
600 | static struct attribute *usb2_hardware_lpm_attr[] = { |
601 | &dev_attr_usb2_hardware_lpm.attr, | |
17f34867 MN |
602 | &dev_attr_usb2_lpm_l1_timeout.attr, |
603 | &dev_attr_usb2_lpm_besl.attr, | |
c1045e87 AX |
604 | NULL, |
605 | }; | |
606 | static struct attribute_group usb2_hardware_lpm_attr_group = { | |
607 | .name = power_group_name, | |
608 | .attrs = usb2_hardware_lpm_attr, | |
609 | }; | |
610 | ||
655fe4ef | 611 | static struct attribute *usb3_hardware_lpm_attr[] = { |
bf5ce5bf LB |
612 | &dev_attr_usb3_hardware_lpm_u1.attr, |
613 | &dev_attr_usb3_hardware_lpm_u2.attr, | |
655fe4ef KS |
614 | NULL, |
615 | }; | |
616 | static struct attribute_group usb3_hardware_lpm_attr_group = { | |
617 | .name = power_group_name, | |
618 | .attrs = usb3_hardware_lpm_attr, | |
619 | }; | |
620 | ||
045cac6b AS |
621 | static struct attribute *power_attrs[] = { |
622 | &dev_attr_autosuspend.attr, | |
623 | &dev_attr_level.attr, | |
624 | &dev_attr_connected_duration.attr, | |
625 | &dev_attr_active_duration.attr, | |
626 | NULL, | |
627 | }; | |
628 | static struct attribute_group power_attr_group = { | |
629 | .name = power_group_name, | |
630 | .attrs = power_attrs, | |
631 | }; | |
632 | ||
19c26239 AS |
633 | static int add_power_attributes(struct device *dev) |
634 | { | |
635 | int rc = 0; | |
636 | ||
c1045e87 AX |
637 | if (is_usb_device(dev)) { |
638 | struct usb_device *udev = to_usb_device(dev); | |
045cac6b | 639 | rc = sysfs_merge_group(&dev->kobj, &power_attr_group); |
c1045e87 AX |
640 | if (udev->usb2_hw_lpm_capable == 1) |
641 | rc = sysfs_merge_group(&dev->kobj, | |
642 | &usb2_hardware_lpm_attr_group); | |
bf5ce5bf LB |
643 | if (udev->speed == USB_SPEED_SUPER && |
644 | udev->lpm_capable == 1) | |
655fe4ef KS |
645 | rc = sysfs_merge_group(&dev->kobj, |
646 | &usb3_hardware_lpm_attr_group); | |
c1045e87 AX |
647 | } |
648 | ||
19c26239 AS |
649 | return rc; |
650 | } | |
651 | ||
652 | static void remove_power_attributes(struct device *dev) | |
653 | { | |
c1045e87 | 654 | sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group); |
045cac6b | 655 | sysfs_unmerge_group(&dev->kobj, &power_attr_group); |
19c26239 AS |
656 | } |
657 | ||
658 | #else | |
659 | ||
ceb6c9c8 RW |
660 | #define add_persist_attributes(dev) 0 |
661 | #define remove_persist_attributes(dev) do {} while (0) | |
662 | ||
19c26239 AS |
663 | #define add_power_attributes(dev) 0 |
664 | #define remove_power_attributes(dev) do {} while (0) | |
665 | ||
ceb6c9c8 | 666 | #endif /* CONFIG_PM */ |
19c26239 | 667 | |
b41a60ec | 668 | |
1da177e4 LT |
669 | /* Descriptor fields */ |
670 | #define usb_descriptor_attr_le16(field, format_string) \ | |
671 | static ssize_t \ | |
d03f254f | 672 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 673 | char *buf) \ |
1da177e4 LT |
674 | { \ |
675 | struct usb_device *udev; \ | |
676 | \ | |
9251644a ON |
677 | udev = to_usb_device(dev); \ |
678 | return sprintf(buf, format_string, \ | |
1da177e4 LT |
679 | le16_to_cpu(udev->descriptor.field)); \ |
680 | } \ | |
d03f254f | 681 | static DEVICE_ATTR_RO(field) |
1da177e4 | 682 | |
d03f254f GKH |
683 | usb_descriptor_attr_le16(idVendor, "%04x\n"); |
684 | usb_descriptor_attr_le16(idProduct, "%04x\n"); | |
685 | usb_descriptor_attr_le16(bcdDevice, "%04x\n"); | |
1da177e4 LT |
686 | |
687 | #define usb_descriptor_attr(field, format_string) \ | |
688 | static ssize_t \ | |
d03f254f | 689 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 690 | char *buf) \ |
1da177e4 LT |
691 | { \ |
692 | struct usb_device *udev; \ | |
693 | \ | |
9251644a ON |
694 | udev = to_usb_device(dev); \ |
695 | return sprintf(buf, format_string, udev->descriptor.field); \ | |
1da177e4 | 696 | } \ |
d03f254f | 697 | static DEVICE_ATTR_RO(field) |
1da177e4 | 698 | |
d03f254f GKH |
699 | usb_descriptor_attr(bDeviceClass, "%02x\n"); |
700 | usb_descriptor_attr(bDeviceSubClass, "%02x\n"); | |
701 | usb_descriptor_attr(bDeviceProtocol, "%02x\n"); | |
702 | usb_descriptor_attr(bNumConfigurations, "%d\n"); | |
703 | usb_descriptor_attr(bMaxPacketSize0, "%d\n"); | |
e03f2e8a IPG |
704 | |
705 | ||
706 | /* show if the device is authorized (1) or not (0) */ | |
d03f254f GKH |
707 | static ssize_t authorized_show(struct device *dev, |
708 | struct device_attribute *attr, char *buf) | |
e03f2e8a IPG |
709 | { |
710 | struct usb_device *usb_dev = to_usb_device(dev); | |
711 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); | |
712 | } | |
713 | ||
e03f2e8a IPG |
714 | /* |
715 | * Authorize a device to be used in the system | |
716 | * | |
717 | * Writing a 0 deauthorizes the device, writing a 1 authorizes it. | |
718 | */ | |
d03f254f GKH |
719 | static ssize_t authorized_store(struct device *dev, |
720 | struct device_attribute *attr, const char *buf, | |
721 | size_t size) | |
e03f2e8a IPG |
722 | { |
723 | ssize_t result; | |
724 | struct usb_device *usb_dev = to_usb_device(dev); | |
725 | unsigned val; | |
726 | result = sscanf(buf, "%u\n", &val); | |
727 | if (result != 1) | |
728 | result = -EINVAL; | |
729 | else if (val == 0) | |
730 | result = usb_deauthorize_device(usb_dev); | |
731 | else | |
732 | result = usb_authorize_device(usb_dev); | |
469271f8 | 733 | return result < 0 ? result : size; |
e03f2e8a | 734 | } |
d03f254f GKH |
735 | static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, S_IRUGO | S_IWUSR, |
736 | authorized_show, authorized_store); | |
e03f2e8a | 737 | |
253e0572 | 738 | /* "Safely remove a device" */ |
d03f254f GKH |
739 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
740 | const char *buf, size_t count) | |
253e0572 AS |
741 | { |
742 | struct usb_device *udev = to_usb_device(dev); | |
743 | int rc = 0; | |
744 | ||
745 | usb_lock_device(udev); | |
746 | if (udev->state != USB_STATE_NOTATTACHED) { | |
747 | ||
748 | /* To avoid races, first unconfigure and then remove */ | |
749 | usb_set_configuration(udev, -1); | |
750 | rc = usb_remove_device(udev); | |
751 | } | |
752 | if (rc == 0) | |
753 | rc = count; | |
754 | usb_unlock_device(udev); | |
755 | return rc; | |
756 | } | |
d03f254f | 757 | static DEVICE_ATTR_IGNORE_LOCKDEP(remove, S_IWUSR, NULL, remove_store); |
253e0572 | 758 | |
e03f2e8a | 759 | |
1da177e4 LT |
760 | static struct attribute *dev_attrs[] = { |
761 | /* current configuration's attributes */ | |
b6eb2d84 | 762 | &dev_attr_configuration.attr, |
1da177e4 LT |
763 | &dev_attr_bNumInterfaces.attr, |
764 | &dev_attr_bConfigurationValue.attr, | |
765 | &dev_attr_bmAttributes.attr, | |
766 | &dev_attr_bMaxPower.attr, | |
767 | /* device attributes */ | |
9af23624 | 768 | &dev_attr_urbnum.attr, |
1da177e4 LT |
769 | &dev_attr_idVendor.attr, |
770 | &dev_attr_idProduct.attr, | |
771 | &dev_attr_bcdDevice.attr, | |
772 | &dev_attr_bDeviceClass.attr, | |
773 | &dev_attr_bDeviceSubClass.attr, | |
774 | &dev_attr_bDeviceProtocol.attr, | |
775 | &dev_attr_bNumConfigurations.attr, | |
cf5910bb | 776 | &dev_attr_bMaxPacketSize0.attr, |
1da177e4 | 777 | &dev_attr_speed.attr, |
83f7d958 | 778 | &dev_attr_busnum.attr, |
1da177e4 | 779 | &dev_attr_devnum.attr, |
9af23624 | 780 | &dev_attr_devpath.attr, |
1da177e4 LT |
781 | &dev_attr_version.attr, |
782 | &dev_attr_maxchild.attr, | |
7ceec1f1 | 783 | &dev_attr_quirks.attr, |
ef955341 | 784 | &dev_attr_avoid_reset_quirk.attr, |
e03f2e8a | 785 | &dev_attr_authorized.attr, |
253e0572 | 786 | &dev_attr_remove.attr, |
0846e7e9 | 787 | &dev_attr_removable.attr, |
024f117c | 788 | &dev_attr_ltm_capable.attr, |
1da177e4 LT |
789 | NULL, |
790 | }; | |
791 | static struct attribute_group dev_attr_grp = { | |
792 | .attrs = dev_attrs, | |
793 | }; | |
794 | ||
2e5f10e4 AS |
795 | /* When modifying this list, be sure to modify dev_string_attrs_are_visible() |
796 | * accordingly. | |
797 | */ | |
798 | static struct attribute *dev_string_attrs[] = { | |
799 | &dev_attr_manufacturer.attr, | |
800 | &dev_attr_product.attr, | |
801 | &dev_attr_serial.attr, | |
802 | NULL | |
803 | }; | |
804 | ||
587a1f16 | 805 | static umode_t dev_string_attrs_are_visible(struct kobject *kobj, |
2e5f10e4 AS |
806 | struct attribute *a, int n) |
807 | { | |
a864e3aa HS |
808 | struct device *dev = container_of(kobj, struct device, kobj); |
809 | struct usb_device *udev = to_usb_device(dev); | |
2e5f10e4 AS |
810 | |
811 | if (a == &dev_attr_manufacturer.attr) { | |
812 | if (udev->manufacturer == NULL) | |
813 | return 0; | |
814 | } else if (a == &dev_attr_product.attr) { | |
815 | if (udev->product == NULL) | |
816 | return 0; | |
817 | } else if (a == &dev_attr_serial.attr) { | |
818 | if (udev->serial == NULL) | |
819 | return 0; | |
820 | } | |
821 | return a->mode; | |
822 | } | |
823 | ||
824 | static struct attribute_group dev_string_attr_grp = { | |
825 | .attrs = dev_string_attrs, | |
826 | .is_visible = dev_string_attrs_are_visible, | |
827 | }; | |
828 | ||
a4dbd674 | 829 | const struct attribute_group *usb_device_groups[] = { |
2e5f10e4 AS |
830 | &dev_attr_grp, |
831 | &dev_string_attr_grp, | |
832 | NULL | |
833 | }; | |
834 | ||
69d42a78 AS |
835 | /* Binary descriptors */ |
836 | ||
837 | static ssize_t | |
2c3c8bea CW |
838 | read_descriptors(struct file *filp, struct kobject *kobj, |
839 | struct bin_attribute *attr, | |
69d42a78 AS |
840 | char *buf, loff_t off, size_t count) |
841 | { | |
a864e3aa HS |
842 | struct device *dev = container_of(kobj, struct device, kobj); |
843 | struct usb_device *udev = to_usb_device(dev); | |
69d42a78 AS |
844 | size_t nleft = count; |
845 | size_t srclen, n; | |
b4a90d04 | 846 | int cfgno; |
217a9081 | 847 | void *src; |
69d42a78 | 848 | |
217a9081 AS |
849 | /* The binary attribute begins with the device descriptor. |
850 | * Following that are the raw descriptor entries for all the | |
851 | * configurations (config plus subsidiary descriptors). | |
69d42a78 | 852 | */ |
217a9081 AS |
853 | for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations && |
854 | nleft > 0; ++cfgno) { | |
855 | if (cfgno < 0) { | |
856 | src = &udev->descriptor; | |
857 | srclen = sizeof(struct usb_device_descriptor); | |
858 | } else { | |
859 | src = udev->rawdescriptors[cfgno]; | |
860 | srclen = __le16_to_cpu(udev->config[cfgno].desc. | |
861 | wTotalLength); | |
862 | } | |
69d42a78 | 863 | if (off < srclen) { |
217a9081 AS |
864 | n = min(nleft, srclen - (size_t) off); |
865 | memcpy(buf, src + off, n); | |
69d42a78 | 866 | nleft -= n; |
217a9081 AS |
867 | buf += n; |
868 | off = 0; | |
869 | } else { | |
870 | off -= srclen; | |
69d42a78 AS |
871 | } |
872 | } | |
69d42a78 AS |
873 | return count - nleft; |
874 | } | |
875 | ||
876 | static struct bin_attribute dev_bin_attr_descriptors = { | |
877 | .attr = {.name = "descriptors", .mode = 0444}, | |
878 | .read = read_descriptors, | |
879 | .size = 18 + 65535, /* dev descr + max-size raw descriptor */ | |
880 | }; | |
881 | ||
1b21d5e1 | 882 | int usb_create_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
883 | { |
884 | struct device *dev = &udev->dev; | |
1b21d5e1 | 885 | int retval; |
1da177e4 | 886 | |
69d42a78 AS |
887 | retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); |
888 | if (retval) | |
889 | goto error; | |
890 | ||
b41a60ec AS |
891 | retval = add_persist_attributes(dev); |
892 | if (retval) | |
893 | goto error; | |
894 | ||
19c26239 AS |
895 | retval = add_power_attributes(dev); |
896 | if (retval) | |
897 | goto error; | |
3b23dd6f | 898 | return retval; |
1b21d5e1 | 899 | error: |
aa084f3e | 900 | usb_remove_sysfs_dev_files(udev); |
1b21d5e1 | 901 | return retval; |
1da177e4 LT |
902 | } |
903 | ||
9251644a | 904 | void usb_remove_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
905 | { |
906 | struct device *dev = &udev->dev; | |
907 | ||
19c26239 | 908 | remove_power_attributes(dev); |
b41a60ec | 909 | remove_persist_attributes(dev); |
69d42a78 | 910 | device_remove_bin_file(dev, &dev_bin_attr_descriptors); |
1da177e4 LT |
911 | } |
912 | ||
025d4430 | 913 | /* Interface Association Descriptor fields */ |
165fe97e CN |
914 | #define usb_intf_assoc_attr(field, format_string) \ |
915 | static ssize_t \ | |
d03f254f | 916 | iad_##field##_show(struct device *dev, struct device_attribute *attr, \ |
165fe97e CN |
917 | char *buf) \ |
918 | { \ | |
2c044a48 | 919 | struct usb_interface *intf = to_usb_interface(dev); \ |
165fe97e | 920 | \ |
2c044a48 GKH |
921 | return sprintf(buf, format_string, \ |
922 | intf->intf_assoc->field); \ | |
165fe97e | 923 | } \ |
d03f254f | 924 | static DEVICE_ATTR_RO(iad_##field) |
165fe97e | 925 | |
d03f254f GKH |
926 | usb_intf_assoc_attr(bFirstInterface, "%02x\n"); |
927 | usb_intf_assoc_attr(bInterfaceCount, "%02d\n"); | |
928 | usb_intf_assoc_attr(bFunctionClass, "%02x\n"); | |
929 | usb_intf_assoc_attr(bFunctionSubClass, "%02x\n"); | |
930 | usb_intf_assoc_attr(bFunctionProtocol, "%02x\n"); | |
165fe97e | 931 | |
1da177e4 LT |
932 | /* Interface fields */ |
933 | #define usb_intf_attr(field, format_string) \ | |
934 | static ssize_t \ | |
d03f254f | 935 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 936 | char *buf) \ |
1da177e4 | 937 | { \ |
9251644a | 938 | struct usb_interface *intf = to_usb_interface(dev); \ |
1da177e4 | 939 | \ |
9251644a | 940 | return sprintf(buf, format_string, \ |
b724ae77 | 941 | intf->cur_altsetting->desc.field); \ |
1da177e4 | 942 | } \ |
d03f254f | 943 | static DEVICE_ATTR_RO(field) |
1da177e4 | 944 | |
d03f254f GKH |
945 | usb_intf_attr(bInterfaceNumber, "%02x\n"); |
946 | usb_intf_attr(bAlternateSetting, "%2d\n"); | |
947 | usb_intf_attr(bNumEndpoints, "%02x\n"); | |
948 | usb_intf_attr(bInterfaceClass, "%02x\n"); | |
949 | usb_intf_attr(bInterfaceSubClass, "%02x\n"); | |
950 | usb_intf_attr(bInterfaceProtocol, "%02x\n"); | |
1da177e4 | 951 | |
d03f254f GKH |
952 | static ssize_t interface_show(struct device *dev, struct device_attribute *attr, |
953 | char *buf) | |
1da177e4 LT |
954 | { |
955 | struct usb_interface *intf; | |
2e5f10e4 | 956 | char *string; |
1da177e4 | 957 | |
9251644a | 958 | intf = to_usb_interface(dev); |
232275a0 | 959 | string = ACCESS_ONCE(intf->cur_altsetting->string); |
2e5f10e4 | 960 | if (!string) |
1da177e4 | 961 | return 0; |
2e5f10e4 | 962 | return sprintf(buf, "%s\n", string); |
1da177e4 | 963 | } |
d03f254f | 964 | static DEVICE_ATTR_RO(interface); |
1da177e4 | 965 | |
d03f254f GKH |
966 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
967 | char *buf) | |
360b52b0 GK |
968 | { |
969 | struct usb_interface *intf; | |
970 | struct usb_device *udev; | |
7521803d | 971 | struct usb_host_interface *alt; |
360b52b0 GK |
972 | |
973 | intf = to_usb_interface(dev); | |
974 | udev = interface_to_usbdev(intf); | |
232275a0 | 975 | alt = ACCESS_ONCE(intf->cur_altsetting); |
7521803d GKH |
976 | |
977 | return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" | |
81df2d59 | 978 | "ic%02Xisc%02Xip%02Xin%02X\n", |
7521803d GKH |
979 | le16_to_cpu(udev->descriptor.idVendor), |
980 | le16_to_cpu(udev->descriptor.idProduct), | |
981 | le16_to_cpu(udev->descriptor.bcdDevice), | |
982 | udev->descriptor.bDeviceClass, | |
983 | udev->descriptor.bDeviceSubClass, | |
984 | udev->descriptor.bDeviceProtocol, | |
985 | alt->desc.bInterfaceClass, | |
986 | alt->desc.bInterfaceSubClass, | |
81df2d59 BM |
987 | alt->desc.bInterfaceProtocol, |
988 | alt->desc.bInterfaceNumber); | |
360b52b0 | 989 | } |
d03f254f | 990 | static DEVICE_ATTR_RO(modalias); |
360b52b0 | 991 | |
d03f254f GKH |
992 | static ssize_t supports_autosuspend_show(struct device *dev, |
993 | struct device_attribute *attr, | |
994 | char *buf) | |
49e7cc84 | 995 | { |
232275a0 | 996 | int s; |
49e7cc84 | 997 | |
7dd9cba5 ON |
998 | s = device_lock_interruptible(dev); |
999 | if (s < 0) | |
1000 | return -EINTR; | |
49e7cc84 | 1001 | /* Devices will be autosuspended even when an interface isn't claimed */ |
232275a0 AS |
1002 | s = (!dev->driver || to_usb_driver(dev->driver)->supports_autosuspend); |
1003 | device_unlock(dev); | |
49e7cc84 | 1004 | |
232275a0 | 1005 | return sprintf(buf, "%u\n", s); |
49e7cc84 | 1006 | } |
d03f254f | 1007 | static DEVICE_ATTR_RO(supports_autosuspend); |
49e7cc84 | 1008 | |
310d2b41 SK |
1009 | /* |
1010 | * interface_authorized_show - show authorization status of an USB interface | |
1011 | * 1 is authorized, 0 is deauthorized | |
1012 | */ | |
1013 | static ssize_t interface_authorized_show(struct device *dev, | |
1014 | struct device_attribute *attr, char *buf) | |
1015 | { | |
1016 | struct usb_interface *intf = to_usb_interface(dev); | |
1017 | ||
1018 | return sprintf(buf, "%u\n", intf->authorized); | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * interface_authorized_store - authorize or deauthorize an USB interface | |
1023 | */ | |
1024 | static ssize_t interface_authorized_store(struct device *dev, | |
1025 | struct device_attribute *attr, const char *buf, size_t count) | |
1026 | { | |
1027 | struct usb_interface *intf = to_usb_interface(dev); | |
1028 | bool val; | |
1029 | ||
1030 | if (strtobool(buf, &val) != 0) | |
1031 | return -EINVAL; | |
1032 | ||
1033 | if (val) | |
1034 | usb_authorize_interface(intf); | |
1035 | else | |
1036 | usb_deauthorize_interface(intf); | |
1037 | ||
1038 | return count; | |
1039 | } | |
1040 | static struct device_attribute dev_attr_interface_authorized = | |
1041 | __ATTR(authorized, S_IRUGO | S_IWUSR, | |
1042 | interface_authorized_show, interface_authorized_store); | |
1043 | ||
1da177e4 LT |
1044 | static struct attribute *intf_attrs[] = { |
1045 | &dev_attr_bInterfaceNumber.attr, | |
1046 | &dev_attr_bAlternateSetting.attr, | |
1047 | &dev_attr_bNumEndpoints.attr, | |
1048 | &dev_attr_bInterfaceClass.attr, | |
1049 | &dev_attr_bInterfaceSubClass.attr, | |
1050 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 1051 | &dev_attr_modalias.attr, |
49e7cc84 | 1052 | &dev_attr_supports_autosuspend.attr, |
310d2b41 | 1053 | &dev_attr_interface_authorized.attr, |
1da177e4 LT |
1054 | NULL, |
1055 | }; | |
1056 | static struct attribute_group intf_attr_grp = { | |
1057 | .attrs = intf_attrs, | |
1058 | }; | |
1059 | ||
2e5f10e4 AS |
1060 | static struct attribute *intf_assoc_attrs[] = { |
1061 | &dev_attr_iad_bFirstInterface.attr, | |
1062 | &dev_attr_iad_bInterfaceCount.attr, | |
1063 | &dev_attr_iad_bFunctionClass.attr, | |
1064 | &dev_attr_iad_bFunctionSubClass.attr, | |
1065 | &dev_attr_iad_bFunctionProtocol.attr, | |
1066 | NULL, | |
1067 | }; | |
1068 | ||
587a1f16 | 1069 | static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj, |
2e5f10e4 AS |
1070 | struct attribute *a, int n) |
1071 | { | |
a864e3aa HS |
1072 | struct device *dev = container_of(kobj, struct device, kobj); |
1073 | struct usb_interface *intf = to_usb_interface(dev); | |
2e5f10e4 AS |
1074 | |
1075 | if (intf->intf_assoc == NULL) | |
1076 | return 0; | |
1077 | return a->mode; | |
1078 | } | |
1079 | ||
1080 | static struct attribute_group intf_assoc_attr_grp = { | |
1081 | .attrs = intf_assoc_attrs, | |
1082 | .is_visible = intf_assoc_attrs_are_visible, | |
1083 | }; | |
1084 | ||
a4dbd674 | 1085 | const struct attribute_group *usb_interface_groups[] = { |
2e5f10e4 AS |
1086 | &intf_attr_grp, |
1087 | &intf_assoc_attr_grp, | |
1088 | NULL | |
1089 | }; | |
1090 | ||
643de624 | 1091 | void usb_create_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 1092 | { |
4f62efe6 AS |
1093 | struct usb_device *udev = interface_to_usbdev(intf); |
1094 | struct usb_host_interface *alt = intf->cur_altsetting; | |
1095 | ||
352d0263 | 1096 | if (intf->sysfs_files_created || intf->unregistering) |
643de624 | 1097 | return; |
1da177e4 | 1098 | |
643de624 | 1099 | if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS)) |
4f62efe6 | 1100 | alt->string = usb_cache_string(udev, alt->desc.iInterface); |
643de624 MN |
1101 | if (alt->string && device_create_file(&intf->dev, &dev_attr_interface)) |
1102 | ; /* We don't actually care if the function fails. */ | |
7e61559f | 1103 | intf->sysfs_files_created = 1; |
1da177e4 LT |
1104 | } |
1105 | ||
9251644a | 1106 | void usb_remove_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 1107 | { |
7e61559f AS |
1108 | if (!intf->sysfs_files_created) |
1109 | return; | |
92b0da15 | 1110 | |
92b0da15 | 1111 | device_remove_file(&intf->dev, &dev_attr_interface); |
7e61559f | 1112 | intf->sysfs_files_created = 0; |
1da177e4 | 1113 | } |