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 | * | |
b65fba3d GKH |
10 | * Released under the GPLv2 only. |
11 | * SPDX-License-Identifier: GPL-2.0 | |
1da177e4 LT |
12 | */ |
13 | ||
14 | ||
1da177e4 | 15 | #include <linux/kernel.h> |
2add5229 | 16 | #include <linux/string.h> |
1da177e4 | 17 | #include <linux/usb.h> |
1662e3a7 | 18 | #include <linux/usb/quirks.h> |
51fa9147 | 19 | #include <linux/of.h> |
1da177e4 LT |
20 | #include "usb.h" |
21 | ||
22 | /* Active configuration fields */ | |
8d8479db | 23 | #define usb_actconfig_show(field, format_string) \ |
d03f254f GKH |
24 | static ssize_t field##_show(struct device *dev, \ |
25 | struct device_attribute *attr, char *buf) \ | |
1da177e4 LT |
26 | { \ |
27 | struct usb_device *udev; \ | |
28 | struct usb_host_config *actconfig; \ | |
7dd9cba5 | 29 | ssize_t rc; \ |
1da177e4 | 30 | \ |
9251644a | 31 | udev = to_usb_device(dev); \ |
7dd9cba5 ON |
32 | rc = usb_lock_device_interruptible(udev); \ |
33 | if (rc < 0) \ | |
34 | return -EINTR; \ | |
1da177e4 LT |
35 | actconfig = udev->actconfig; \ |
36 | if (actconfig) \ | |
232275a0 | 37 | rc = sprintf(buf, format_string, \ |
8d8479db | 38 | actconfig->desc.field); \ |
232275a0 AS |
39 | usb_unlock_device(udev); \ |
40 | return rc; \ | |
1da177e4 LT |
41 | } \ |
42 | ||
8d8479db SAS |
43 | #define usb_actconfig_attr(field, format_string) \ |
44 | usb_actconfig_show(field, format_string) \ | |
d03f254f | 45 | static DEVICE_ATTR_RO(field) |
1da177e4 | 46 | |
d03f254f GKH |
47 | usb_actconfig_attr(bNumInterfaces, "%2d\n"); |
48 | usb_actconfig_attr(bmAttributes, "%2x\n"); | |
8d8479db | 49 | |
d03f254f | 50 | static ssize_t bMaxPower_show(struct device *dev, |
8d8479db SAS |
51 | struct device_attribute *attr, char *buf) |
52 | { | |
53 | struct usb_device *udev; | |
54 | struct usb_host_config *actconfig; | |
7dd9cba5 | 55 | ssize_t rc; |
8d8479db SAS |
56 | |
57 | udev = to_usb_device(dev); | |
7dd9cba5 ON |
58 | rc = usb_lock_device_interruptible(udev); |
59 | if (rc < 0) | |
60 | return -EINTR; | |
8d8479db | 61 | actconfig = udev->actconfig; |
232275a0 AS |
62 | if (actconfig) |
63 | rc = sprintf(buf, "%dmA\n", usb_get_max_power(udev, actconfig)); | |
64 | usb_unlock_device(udev); | |
65 | return rc; | |
8d8479db | 66 | } |
d03f254f | 67 | static DEVICE_ATTR_RO(bMaxPower); |
1da177e4 | 68 | |
d03f254f | 69 | static ssize_t configuration_show(struct device *dev, |
b724ae77 | 70 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
71 | { |
72 | struct usb_device *udev; | |
73 | struct usb_host_config *actconfig; | |
7dd9cba5 | 74 | ssize_t rc; |
1da177e4 | 75 | |
9251644a | 76 | udev = to_usb_device(dev); |
7dd9cba5 ON |
77 | rc = usb_lock_device_interruptible(udev); |
78 | if (rc < 0) | |
79 | return -EINTR; | |
1da177e4 | 80 | actconfig = udev->actconfig; |
232275a0 AS |
81 | if (actconfig && actconfig->string) |
82 | rc = sprintf(buf, "%s\n", actconfig->string); | |
83 | usb_unlock_device(udev); | |
84 | return rc; | |
1da177e4 | 85 | } |
d03f254f | 86 | static DEVICE_ATTR_RO(configuration); |
1da177e4 LT |
87 | |
88 | /* configuration value is always present, and r/w */ | |
8d8479db | 89 | usb_actconfig_show(bConfigurationValue, "%u\n"); |
1da177e4 | 90 | |
d03f254f GKH |
91 | static ssize_t bConfigurationValue_store(struct device *dev, |
92 | struct device_attribute *attr, | |
93 | const char *buf, size_t count) | |
1da177e4 | 94 | { |
9251644a | 95 | struct usb_device *udev = to_usb_device(dev); |
7dd9cba5 | 96 | int config, value, rc; |
1da177e4 | 97 | |
3f141e2a | 98 | if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255) |
1da177e4 | 99 | return -EINVAL; |
7dd9cba5 ON |
100 | rc = usb_lock_device_interruptible(udev); |
101 | if (rc < 0) | |
102 | return -EINTR; | |
9251644a | 103 | value = usb_set_configuration(udev, config); |
1da177e4 LT |
104 | usb_unlock_device(udev); |
105 | return (value < 0) ? value : count; | |
106 | } | |
356c05d5 | 107 | static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR, |
d03f254f | 108 | bConfigurationValue_show, bConfigurationValue_store); |
1da177e4 | 109 | |
51fa9147 VK |
110 | #ifdef CONFIG_OF |
111 | static ssize_t devspec_show(struct device *dev, struct device_attribute *attr, | |
112 | char *buf) | |
113 | { | |
114 | struct device_node *of_node = dev->of_node; | |
115 | ||
116 | return sprintf(buf, "%s\n", of_node_full_name(of_node)); | |
117 | } | |
118 | static DEVICE_ATTR_RO(devspec); | |
119 | #endif | |
120 | ||
1da177e4 LT |
121 | /* String fields */ |
122 | #define usb_string_attr(name) \ | |
d03f254f | 123 | static ssize_t name##_show(struct device *dev, \ |
b724ae77 | 124 | struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
125 | { \ |
126 | struct usb_device *udev; \ | |
da307123 | 127 | int retval; \ |
1da177e4 | 128 | \ |
9251644a | 129 | udev = to_usb_device(dev); \ |
7dd9cba5 ON |
130 | retval = usb_lock_device_interruptible(udev); \ |
131 | if (retval < 0) \ | |
132 | return -EINTR; \ | |
da307123 AS |
133 | retval = sprintf(buf, "%s\n", udev->name); \ |
134 | usb_unlock_device(udev); \ | |
135 | return retval; \ | |
1da177e4 | 136 | } \ |
d03f254f | 137 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
138 | |
139 | usb_string_attr(product); | |
140 | usb_string_attr(manufacturer); | |
141 | usb_string_attr(serial); | |
142 | ||
d03f254f GKH |
143 | static ssize_t speed_show(struct device *dev, struct device_attribute *attr, |
144 | char *buf) | |
1da177e4 LT |
145 | { |
146 | struct usb_device *udev; | |
147 | char *speed; | |
148 | ||
9251644a | 149 | udev = to_usb_device(dev); |
1da177e4 LT |
150 | |
151 | switch (udev->speed) { | |
152 | case USB_SPEED_LOW: | |
153 | speed = "1.5"; | |
154 | break; | |
155 | case USB_SPEED_UNKNOWN: | |
156 | case USB_SPEED_FULL: | |
157 | speed = "12"; | |
158 | break; | |
159 | case USB_SPEED_HIGH: | |
160 | speed = "480"; | |
161 | break; | |
551cdbbe | 162 | case USB_SPEED_WIRELESS: |
b132b04e GKH |
163 | speed = "480"; |
164 | break; | |
165 | case USB_SPEED_SUPER: | |
166 | speed = "5000"; | |
167 | break; | |
b2316645 MN |
168 | case USB_SPEED_SUPER_PLUS: |
169 | speed = "10000"; | |
170 | break; | |
1da177e4 LT |
171 | default: |
172 | speed = "unknown"; | |
173 | } | |
9251644a | 174 | return sprintf(buf, "%s\n", speed); |
1da177e4 | 175 | } |
d03f254f | 176 | static DEVICE_ATTR_RO(speed); |
1da177e4 | 177 | |
d03f254f GKH |
178 | static ssize_t busnum_show(struct device *dev, struct device_attribute *attr, |
179 | char *buf) | |
83f7d958 AS |
180 | { |
181 | struct usb_device *udev; | |
182 | ||
183 | udev = to_usb_device(dev); | |
184 | return sprintf(buf, "%d\n", udev->bus->busnum); | |
185 | } | |
d03f254f | 186 | static DEVICE_ATTR_RO(busnum); |
83f7d958 | 187 | |
d03f254f GKH |
188 | static ssize_t devnum_show(struct device *dev, struct device_attribute *attr, |
189 | char *buf) | |
1da177e4 LT |
190 | { |
191 | struct usb_device *udev; | |
192 | ||
9251644a ON |
193 | udev = to_usb_device(dev); |
194 | return sprintf(buf, "%d\n", udev->devnum); | |
1da177e4 | 195 | } |
d03f254f | 196 | static DEVICE_ATTR_RO(devnum); |
1da177e4 | 197 | |
d03f254f GKH |
198 | static ssize_t devpath_show(struct device *dev, struct device_attribute *attr, |
199 | char *buf) | |
9af23624 GKH |
200 | { |
201 | struct usb_device *udev; | |
202 | ||
203 | udev = to_usb_device(dev); | |
204 | return sprintf(buf, "%s\n", udev->devpath); | |
205 | } | |
d03f254f | 206 | static DEVICE_ATTR_RO(devpath); |
9af23624 | 207 | |
d03f254f GKH |
208 | static ssize_t version_show(struct device *dev, struct device_attribute *attr, |
209 | char *buf) | |
1da177e4 LT |
210 | { |
211 | struct usb_device *udev; | |
212 | u16 bcdUSB; | |
213 | ||
214 | udev = to_usb_device(dev); | |
215 | bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); | |
216 | return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); | |
217 | } | |
d03f254f | 218 | static DEVICE_ATTR_RO(version); |
1da177e4 | 219 | |
d03f254f GKH |
220 | static ssize_t maxchild_show(struct device *dev, struct device_attribute *attr, |
221 | char *buf) | |
1da177e4 LT |
222 | { |
223 | struct usb_device *udev; | |
224 | ||
9251644a ON |
225 | udev = to_usb_device(dev); |
226 | return sprintf(buf, "%d\n", udev->maxchild); | |
1da177e4 | 227 | } |
d03f254f | 228 | static DEVICE_ATTR_RO(maxchild); |
1da177e4 | 229 | |
d03f254f GKH |
230 | static ssize_t quirks_show(struct device *dev, struct device_attribute *attr, |
231 | char *buf) | |
7ceec1f1 ON |
232 | { |
233 | struct usb_device *udev; | |
234 | ||
235 | udev = to_usb_device(dev); | |
236 | return sprintf(buf, "0x%x\n", udev->quirks); | |
237 | } | |
d03f254f | 238 | static DEVICE_ATTR_RO(quirks); |
7ceec1f1 | 239 | |
d03f254f GKH |
240 | static ssize_t avoid_reset_quirk_show(struct device *dev, |
241 | struct device_attribute *attr, char *buf) | |
ef955341 ON |
242 | { |
243 | struct usb_device *udev; | |
244 | ||
245 | udev = to_usb_device(dev); | |
7fda953f | 246 | return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET)); |
ef955341 ON |
247 | } |
248 | ||
d03f254f GKH |
249 | static ssize_t avoid_reset_quirk_store(struct device *dev, |
250 | struct device_attribute *attr, | |
251 | const char *buf, size_t count) | |
ef955341 ON |
252 | { |
253 | struct usb_device *udev = to_usb_device(dev); | |
7dd9cba5 | 254 | int val, rc; |
ef955341 | 255 | |
7fc2cc32 | 256 | if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1) |
ef955341 | 257 | return -EINVAL; |
7dd9cba5 ON |
258 | rc = usb_lock_device_interruptible(udev); |
259 | if (rc < 0) | |
260 | return -EINTR; | |
7fc2cc32 | 261 | if (val) |
7fda953f | 262 | udev->quirks |= USB_QUIRK_RESET; |
ef955341 | 263 | else |
7fda953f | 264 | udev->quirks &= ~USB_QUIRK_RESET; |
ef955341 ON |
265 | usb_unlock_device(udev); |
266 | return count; | |
267 | } | |
d03f254f | 268 | static DEVICE_ATTR_RW(avoid_reset_quirk); |
ef955341 | 269 | |
d03f254f GKH |
270 | static ssize_t urbnum_show(struct device *dev, struct device_attribute *attr, |
271 | char *buf) | |
4d59d8a1 SS |
272 | { |
273 | struct usb_device *udev; | |
274 | ||
275 | udev = to_usb_device(dev); | |
276 | return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); | |
277 | } | |
d03f254f | 278 | static DEVICE_ATTR_RO(urbnum); |
4d59d8a1 | 279 | |
d03f254f GKH |
280 | static ssize_t removable_show(struct device *dev, struct device_attribute *attr, |
281 | char *buf) | |
0846e7e9 MG |
282 | { |
283 | struct usb_device *udev; | |
284 | char *state; | |
285 | ||
286 | udev = to_usb_device(dev); | |
287 | ||
288 | switch (udev->removable) { | |
289 | case USB_DEVICE_REMOVABLE: | |
290 | state = "removable"; | |
291 | break; | |
292 | case USB_DEVICE_FIXED: | |
293 | state = "fixed"; | |
294 | break; | |
295 | default: | |
296 | state = "unknown"; | |
297 | } | |
298 | ||
299 | return sprintf(buf, "%s\n", state); | |
300 | } | |
d03f254f | 301 | static DEVICE_ATTR_RO(removable); |
b41a60ec | 302 | |
d03f254f GKH |
303 | static ssize_t ltm_capable_show(struct device *dev, |
304 | struct device_attribute *attr, char *buf) | |
024f117c SS |
305 | { |
306 | if (usb_device_supports_ltm(to_usb_device(dev))) | |
307 | return sprintf(buf, "%s\n", "yes"); | |
308 | return sprintf(buf, "%s\n", "no"); | |
309 | } | |
d03f254f | 310 | static DEVICE_ATTR_RO(ltm_capable); |
024f117c | 311 | |
feccc30d | 312 | #ifdef CONFIG_PM |
b41a60ec | 313 | |
d03f254f GKH |
314 | static ssize_t persist_show(struct device *dev, struct device_attribute *attr, |
315 | char *buf) | |
b41a60ec AS |
316 | { |
317 | struct usb_device *udev = to_usb_device(dev); | |
318 | ||
319 | return sprintf(buf, "%d\n", udev->persist_enabled); | |
320 | } | |
321 | ||
d03f254f GKH |
322 | static ssize_t persist_store(struct device *dev, struct device_attribute *attr, |
323 | const char *buf, size_t count) | |
b41a60ec AS |
324 | { |
325 | struct usb_device *udev = to_usb_device(dev); | |
7dd9cba5 | 326 | int value, rc; |
b41a60ec AS |
327 | |
328 | /* Hubs are always enabled for USB_PERSIST */ | |
329 | if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
330 | return -EPERM; | |
331 | ||
332 | if (sscanf(buf, "%d", &value) != 1) | |
333 | return -EINVAL; | |
0c4db6df | 334 | |
7dd9cba5 ON |
335 | rc = usb_lock_device_interruptible(udev); |
336 | if (rc < 0) | |
337 | return -EINTR; | |
b41a60ec | 338 | udev->persist_enabled = !!value; |
0c4db6df | 339 | usb_unlock_device(udev); |
b41a60ec AS |
340 | return count; |
341 | } | |
d03f254f | 342 | static DEVICE_ATTR_RW(persist); |
b41a60ec AS |
343 | |
344 | static int add_persist_attributes(struct device *dev) | |
345 | { | |
346 | int rc = 0; | |
347 | ||
348 | if (is_usb_device(dev)) { | |
349 | struct usb_device *udev = to_usb_device(dev); | |
350 | ||
feccc30d AS |
351 | /* Hubs are automatically enabled for USB_PERSIST, |
352 | * no point in creating the attribute file. | |
353 | */ | |
354 | if (udev->descriptor.bDeviceClass != USB_CLASS_HUB) | |
355 | rc = sysfs_add_file_to_group(&dev->kobj, | |
356 | &dev_attr_persist.attr, | |
045cac6b | 357 | power_group_name); |
b41a60ec AS |
358 | } |
359 | return rc; | |
360 | } | |
361 | ||
362 | static void remove_persist_attributes(struct device *dev) | |
363 | { | |
364 | sysfs_remove_file_from_group(&dev->kobj, | |
365 | &dev_attr_persist.attr, | |
045cac6b | 366 | power_group_name); |
b41a60ec | 367 | } |
19c26239 | 368 | |
d03f254f GKH |
369 | static ssize_t connected_duration_show(struct device *dev, |
370 | struct device_attribute *attr, char *buf) | |
15123006 SS |
371 | { |
372 | struct usb_device *udev = to_usb_device(dev); | |
373 | ||
374 | return sprintf(buf, "%u\n", | |
375 | jiffies_to_msecs(jiffies - udev->connect_time)); | |
376 | } | |
d03f254f | 377 | static DEVICE_ATTR_RO(connected_duration); |
15123006 SS |
378 | |
379 | /* | |
380 | * If the device is resumed, the last time the device was suspended has | |
381 | * been pre-subtracted from active_duration. We add the current time to | |
382 | * get the duration that the device was actually active. | |
383 | * | |
384 | * If the device is suspended, the active_duration is up-to-date. | |
385 | */ | |
d03f254f GKH |
386 | static ssize_t active_duration_show(struct device *dev, |
387 | struct device_attribute *attr, char *buf) | |
15123006 SS |
388 | { |
389 | struct usb_device *udev = to_usb_device(dev); | |
390 | int duration; | |
391 | ||
392 | if (udev->state != USB_STATE_SUSPENDED) | |
393 | duration = jiffies_to_msecs(jiffies + udev->active_duration); | |
394 | else | |
395 | duration = jiffies_to_msecs(udev->active_duration); | |
396 | return sprintf(buf, "%u\n", duration); | |
397 | } | |
d03f254f | 398 | static DEVICE_ATTR_RO(active_duration); |
15123006 | 399 | |
d03f254f GKH |
400 | static ssize_t autosuspend_show(struct device *dev, |
401 | struct device_attribute *attr, char *buf) | |
19c26239 | 402 | { |
fcc4a01e | 403 | return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000); |
19c26239 AS |
404 | } |
405 | ||
d03f254f GKH |
406 | static ssize_t autosuspend_store(struct device *dev, |
407 | struct device_attribute *attr, const char *buf, | |
408 | size_t count) | |
19c26239 | 409 | { |
fcc4a01e | 410 | int value; |
19c26239 | 411 | |
fcc4a01e AS |
412 | if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 || |
413 | value <= -INT_MAX/1000) | |
19c26239 | 414 | return -EINVAL; |
19c26239 | 415 | |
fcc4a01e | 416 | pm_runtime_set_autosuspend_delay(dev, value * 1000); |
19c26239 AS |
417 | return count; |
418 | } | |
d03f254f | 419 | static DEVICE_ATTR_RW(autosuspend); |
19c26239 | 420 | |
2add5229 AS |
421 | static const char on_string[] = "on"; |
422 | static const char auto_string[] = "auto"; | |
2add5229 | 423 | |
469271f8 MB |
424 | static void warn_level(void) |
425 | { | |
a9030986 AS |
426 | static int level_warned; |
427 | ||
428 | if (!level_warned) { | |
429 | level_warned = 1; | |
430 | printk(KERN_WARNING "WARNING! power/level is deprecated; " | |
431 | "use power/control instead\n"); | |
432 | } | |
433 | } | |
434 | ||
d03f254f GKH |
435 | static ssize_t level_show(struct device *dev, struct device_attribute *attr, |
436 | char *buf) | |
2add5229 AS |
437 | { |
438 | struct usb_device *udev = to_usb_device(dev); | |
439 | const char *p = auto_string; | |
440 | ||
a9030986 | 441 | warn_level(); |
9e18c821 | 442 | if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto) |
8e4ceb38 | 443 | p = on_string; |
2add5229 AS |
444 | return sprintf(buf, "%s\n", p); |
445 | } | |
446 | ||
d03f254f GKH |
447 | static ssize_t level_store(struct device *dev, struct device_attribute *attr, |
448 | const char *buf, size_t count) | |
2add5229 AS |
449 | { |
450 | struct usb_device *udev = to_usb_device(dev); | |
451 | int len = count; | |
452 | char *cp; | |
9e18c821 | 453 | int rc = count; |
7dd9cba5 | 454 | int rv; |
2add5229 | 455 | |
a9030986 | 456 | warn_level(); |
2add5229 AS |
457 | cp = memchr(buf, '\n', count); |
458 | if (cp) | |
459 | len = cp - buf; | |
460 | ||
7dd9cba5 ON |
461 | rv = usb_lock_device_interruptible(udev); |
462 | if (rv < 0) | |
463 | return -EINTR; | |
2add5229 | 464 | |
2add5229 | 465 | if (len == sizeof on_string - 1 && |
088f7fec | 466 | strncmp(buf, on_string, len) == 0) |
9e18c821 | 467 | usb_disable_autosuspend(udev); |
2add5229 | 468 | |
088f7fec AS |
469 | else if (len == sizeof auto_string - 1 && |
470 | strncmp(buf, auto_string, len) == 0) | |
9e18c821 | 471 | usb_enable_autosuspend(udev); |
2add5229 | 472 | |
088f7fec | 473 | else |
2add5229 AS |
474 | rc = -EINVAL; |
475 | ||
476 | usb_unlock_device(udev); | |
9e18c821 | 477 | return rc; |
2add5229 | 478 | } |
d03f254f | 479 | static DEVICE_ATTR_RW(level); |
2add5229 | 480 | |
d03f254f GKH |
481 | static ssize_t usb2_hardware_lpm_show(struct device *dev, |
482 | struct device_attribute *attr, char *buf) | |
c1045e87 AX |
483 | { |
484 | struct usb_device *udev = to_usb_device(dev); | |
485 | const char *p; | |
486 | ||
de68bab4 | 487 | if (udev->usb2_hw_lpm_allowed == 1) |
c1045e87 AX |
488 | p = "enabled"; |
489 | else | |
490 | p = "disabled"; | |
491 | ||
492 | return sprintf(buf, "%s\n", p); | |
493 | } | |
494 | ||
d03f254f GKH |
495 | static ssize_t usb2_hardware_lpm_store(struct device *dev, |
496 | struct device_attribute *attr, | |
497 | const char *buf, size_t count) | |
c1045e87 AX |
498 | { |
499 | struct usb_device *udev = to_usb_device(dev); | |
500 | bool value; | |
501 | int ret; | |
502 | ||
7dd9cba5 ON |
503 | ret = usb_lock_device_interruptible(udev); |
504 | if (ret < 0) | |
505 | return -EINTR; | |
c1045e87 AX |
506 | |
507 | ret = strtobool(buf, &value); | |
508 | ||
de68bab4 SS |
509 | if (!ret) { |
510 | udev->usb2_hw_lpm_allowed = value; | |
c1045e87 | 511 | ret = usb_set_usb2_hardware_lpm(udev, value); |
de68bab4 | 512 | } |
c1045e87 AX |
513 | |
514 | usb_unlock_device(udev); | |
515 | ||
516 | if (!ret) | |
517 | return count; | |
518 | ||
519 | return ret; | |
520 | } | |
d03f254f | 521 | static DEVICE_ATTR_RW(usb2_hardware_lpm); |
c1045e87 | 522 | |
d03f254f GKH |
523 | static ssize_t usb2_lpm_l1_timeout_show(struct device *dev, |
524 | struct device_attribute *attr, | |
525 | char *buf) | |
17f34867 MN |
526 | { |
527 | struct usb_device *udev = to_usb_device(dev); | |
528 | return sprintf(buf, "%d\n", udev->l1_params.timeout); | |
529 | } | |
530 | ||
d03f254f GKH |
531 | static ssize_t usb2_lpm_l1_timeout_store(struct device *dev, |
532 | struct device_attribute *attr, | |
533 | const char *buf, size_t count) | |
17f34867 MN |
534 | { |
535 | struct usb_device *udev = to_usb_device(dev); | |
536 | u16 timeout; | |
537 | ||
538 | if (kstrtou16(buf, 0, &timeout)) | |
539 | return -EINVAL; | |
540 | ||
541 | udev->l1_params.timeout = timeout; | |
542 | ||
543 | return count; | |
544 | } | |
d03f254f | 545 | static DEVICE_ATTR_RW(usb2_lpm_l1_timeout); |
17f34867 | 546 | |
d03f254f GKH |
547 | static ssize_t usb2_lpm_besl_show(struct device *dev, |
548 | struct device_attribute *attr, char *buf) | |
17f34867 MN |
549 | { |
550 | struct usb_device *udev = to_usb_device(dev); | |
551 | return sprintf(buf, "%d\n", udev->l1_params.besl); | |
552 | } | |
553 | ||
d03f254f GKH |
554 | static ssize_t usb2_lpm_besl_store(struct device *dev, |
555 | struct device_attribute *attr, | |
556 | const char *buf, size_t count) | |
17f34867 MN |
557 | { |
558 | struct usb_device *udev = to_usb_device(dev); | |
559 | u8 besl; | |
560 | ||
561 | if (kstrtou8(buf, 0, &besl) || besl > 15) | |
562 | return -EINVAL; | |
563 | ||
564 | udev->l1_params.besl = besl; | |
565 | ||
566 | return count; | |
567 | } | |
d03f254f | 568 | static DEVICE_ATTR_RW(usb2_lpm_besl); |
17f34867 | 569 | |
bf5ce5bf | 570 | static ssize_t usb3_hardware_lpm_u1_show(struct device *dev, |
655fe4ef KS |
571 | struct device_attribute *attr, char *buf) |
572 | { | |
573 | struct usb_device *udev = to_usb_device(dev); | |
574 | const char *p; | |
7dd9cba5 | 575 | int rc; |
655fe4ef | 576 | |
7dd9cba5 ON |
577 | rc = usb_lock_device_interruptible(udev); |
578 | if (rc < 0) | |
579 | return -EINTR; | |
655fe4ef | 580 | |
bf5ce5bf | 581 | if (udev->usb3_lpm_u1_enabled) |
655fe4ef KS |
582 | p = "enabled"; |
583 | else | |
584 | p = "disabled"; | |
585 | ||
586 | usb_unlock_device(udev); | |
587 | ||
588 | return sprintf(buf, "%s\n", p); | |
589 | } | |
bf5ce5bf LB |
590 | static DEVICE_ATTR_RO(usb3_hardware_lpm_u1); |
591 | ||
592 | static ssize_t usb3_hardware_lpm_u2_show(struct device *dev, | |
593 | struct device_attribute *attr, char *buf) | |
594 | { | |
595 | struct usb_device *udev = to_usb_device(dev); | |
596 | const char *p; | |
7dd9cba5 | 597 | int rc; |
bf5ce5bf | 598 | |
7dd9cba5 ON |
599 | rc = usb_lock_device_interruptible(udev); |
600 | if (rc < 0) | |
601 | return -EINTR; | |
bf5ce5bf LB |
602 | |
603 | if (udev->usb3_lpm_u2_enabled) | |
604 | p = "enabled"; | |
605 | else | |
606 | p = "disabled"; | |
607 | ||
608 | usb_unlock_device(udev); | |
609 | ||
610 | return sprintf(buf, "%s\n", p); | |
611 | } | |
612 | static DEVICE_ATTR_RO(usb3_hardware_lpm_u2); | |
655fe4ef | 613 | |
c1045e87 AX |
614 | static struct attribute *usb2_hardware_lpm_attr[] = { |
615 | &dev_attr_usb2_hardware_lpm.attr, | |
17f34867 MN |
616 | &dev_attr_usb2_lpm_l1_timeout.attr, |
617 | &dev_attr_usb2_lpm_besl.attr, | |
c1045e87 AX |
618 | NULL, |
619 | }; | |
620 | static struct attribute_group usb2_hardware_lpm_attr_group = { | |
621 | .name = power_group_name, | |
622 | .attrs = usb2_hardware_lpm_attr, | |
623 | }; | |
624 | ||
655fe4ef | 625 | static struct attribute *usb3_hardware_lpm_attr[] = { |
bf5ce5bf LB |
626 | &dev_attr_usb3_hardware_lpm_u1.attr, |
627 | &dev_attr_usb3_hardware_lpm_u2.attr, | |
655fe4ef KS |
628 | NULL, |
629 | }; | |
630 | static struct attribute_group usb3_hardware_lpm_attr_group = { | |
631 | .name = power_group_name, | |
632 | .attrs = usb3_hardware_lpm_attr, | |
633 | }; | |
634 | ||
045cac6b AS |
635 | static struct attribute *power_attrs[] = { |
636 | &dev_attr_autosuspend.attr, | |
637 | &dev_attr_level.attr, | |
638 | &dev_attr_connected_duration.attr, | |
639 | &dev_attr_active_duration.attr, | |
640 | NULL, | |
641 | }; | |
642 | static struct attribute_group power_attr_group = { | |
643 | .name = power_group_name, | |
644 | .attrs = power_attrs, | |
645 | }; | |
646 | ||
19c26239 AS |
647 | static int add_power_attributes(struct device *dev) |
648 | { | |
649 | int rc = 0; | |
650 | ||
c1045e87 AX |
651 | if (is_usb_device(dev)) { |
652 | struct usb_device *udev = to_usb_device(dev); | |
045cac6b | 653 | rc = sysfs_merge_group(&dev->kobj, &power_attr_group); |
c1045e87 AX |
654 | if (udev->usb2_hw_lpm_capable == 1) |
655 | rc = sysfs_merge_group(&dev->kobj, | |
656 | &usb2_hardware_lpm_attr_group); | |
bf5ce5bf LB |
657 | if (udev->speed == USB_SPEED_SUPER && |
658 | udev->lpm_capable == 1) | |
655fe4ef KS |
659 | rc = sysfs_merge_group(&dev->kobj, |
660 | &usb3_hardware_lpm_attr_group); | |
c1045e87 AX |
661 | } |
662 | ||
19c26239 AS |
663 | return rc; |
664 | } | |
665 | ||
666 | static void remove_power_attributes(struct device *dev) | |
667 | { | |
c1045e87 | 668 | sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group); |
045cac6b | 669 | sysfs_unmerge_group(&dev->kobj, &power_attr_group); |
19c26239 AS |
670 | } |
671 | ||
672 | #else | |
673 | ||
ceb6c9c8 RW |
674 | #define add_persist_attributes(dev) 0 |
675 | #define remove_persist_attributes(dev) do {} while (0) | |
676 | ||
19c26239 AS |
677 | #define add_power_attributes(dev) 0 |
678 | #define remove_power_attributes(dev) do {} while (0) | |
679 | ||
ceb6c9c8 | 680 | #endif /* CONFIG_PM */ |
19c26239 | 681 | |
b41a60ec | 682 | |
1da177e4 LT |
683 | /* Descriptor fields */ |
684 | #define usb_descriptor_attr_le16(field, format_string) \ | |
685 | static ssize_t \ | |
d03f254f | 686 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 687 | char *buf) \ |
1da177e4 LT |
688 | { \ |
689 | struct usb_device *udev; \ | |
690 | \ | |
9251644a ON |
691 | udev = to_usb_device(dev); \ |
692 | return sprintf(buf, format_string, \ | |
1da177e4 LT |
693 | le16_to_cpu(udev->descriptor.field)); \ |
694 | } \ | |
d03f254f | 695 | static DEVICE_ATTR_RO(field) |
1da177e4 | 696 | |
d03f254f GKH |
697 | usb_descriptor_attr_le16(idVendor, "%04x\n"); |
698 | usb_descriptor_attr_le16(idProduct, "%04x\n"); | |
699 | usb_descriptor_attr_le16(bcdDevice, "%04x\n"); | |
1da177e4 LT |
700 | |
701 | #define usb_descriptor_attr(field, format_string) \ | |
702 | static ssize_t \ | |
d03f254f | 703 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 704 | char *buf) \ |
1da177e4 LT |
705 | { \ |
706 | struct usb_device *udev; \ | |
707 | \ | |
9251644a ON |
708 | udev = to_usb_device(dev); \ |
709 | return sprintf(buf, format_string, udev->descriptor.field); \ | |
1da177e4 | 710 | } \ |
d03f254f | 711 | static DEVICE_ATTR_RO(field) |
1da177e4 | 712 | |
d03f254f GKH |
713 | usb_descriptor_attr(bDeviceClass, "%02x\n"); |
714 | usb_descriptor_attr(bDeviceSubClass, "%02x\n"); | |
715 | usb_descriptor_attr(bDeviceProtocol, "%02x\n"); | |
716 | usb_descriptor_attr(bNumConfigurations, "%d\n"); | |
717 | usb_descriptor_attr(bMaxPacketSize0, "%d\n"); | |
e03f2e8a IPG |
718 | |
719 | ||
720 | /* show if the device is authorized (1) or not (0) */ | |
d03f254f GKH |
721 | static ssize_t authorized_show(struct device *dev, |
722 | struct device_attribute *attr, char *buf) | |
e03f2e8a IPG |
723 | { |
724 | struct usb_device *usb_dev = to_usb_device(dev); | |
725 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); | |
726 | } | |
727 | ||
e03f2e8a IPG |
728 | /* |
729 | * Authorize a device to be used in the system | |
730 | * | |
731 | * Writing a 0 deauthorizes the device, writing a 1 authorizes it. | |
732 | */ | |
d03f254f GKH |
733 | static ssize_t authorized_store(struct device *dev, |
734 | struct device_attribute *attr, const char *buf, | |
735 | size_t size) | |
e03f2e8a IPG |
736 | { |
737 | ssize_t result; | |
738 | struct usb_device *usb_dev = to_usb_device(dev); | |
739 | unsigned val; | |
740 | result = sscanf(buf, "%u\n", &val); | |
741 | if (result != 1) | |
742 | result = -EINVAL; | |
743 | else if (val == 0) | |
744 | result = usb_deauthorize_device(usb_dev); | |
745 | else | |
746 | result = usb_authorize_device(usb_dev); | |
469271f8 | 747 | return result < 0 ? result : size; |
e03f2e8a | 748 | } |
d03f254f GKH |
749 | static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, S_IRUGO | S_IWUSR, |
750 | authorized_show, authorized_store); | |
e03f2e8a | 751 | |
253e0572 | 752 | /* "Safely remove a device" */ |
d03f254f GKH |
753 | static ssize_t remove_store(struct device *dev, struct device_attribute *attr, |
754 | const char *buf, size_t count) | |
253e0572 AS |
755 | { |
756 | struct usb_device *udev = to_usb_device(dev); | |
757 | int rc = 0; | |
758 | ||
759 | usb_lock_device(udev); | |
760 | if (udev->state != USB_STATE_NOTATTACHED) { | |
761 | ||
762 | /* To avoid races, first unconfigure and then remove */ | |
763 | usb_set_configuration(udev, -1); | |
764 | rc = usb_remove_device(udev); | |
765 | } | |
766 | if (rc == 0) | |
767 | rc = count; | |
768 | usb_unlock_device(udev); | |
769 | return rc; | |
770 | } | |
d03f254f | 771 | static DEVICE_ATTR_IGNORE_LOCKDEP(remove, S_IWUSR, NULL, remove_store); |
253e0572 | 772 | |
e03f2e8a | 773 | |
1da177e4 LT |
774 | static struct attribute *dev_attrs[] = { |
775 | /* current configuration's attributes */ | |
b6eb2d84 | 776 | &dev_attr_configuration.attr, |
1da177e4 LT |
777 | &dev_attr_bNumInterfaces.attr, |
778 | &dev_attr_bConfigurationValue.attr, | |
779 | &dev_attr_bmAttributes.attr, | |
780 | &dev_attr_bMaxPower.attr, | |
781 | /* device attributes */ | |
9af23624 | 782 | &dev_attr_urbnum.attr, |
1da177e4 LT |
783 | &dev_attr_idVendor.attr, |
784 | &dev_attr_idProduct.attr, | |
785 | &dev_attr_bcdDevice.attr, | |
786 | &dev_attr_bDeviceClass.attr, | |
787 | &dev_attr_bDeviceSubClass.attr, | |
788 | &dev_attr_bDeviceProtocol.attr, | |
789 | &dev_attr_bNumConfigurations.attr, | |
cf5910bb | 790 | &dev_attr_bMaxPacketSize0.attr, |
1da177e4 | 791 | &dev_attr_speed.attr, |
83f7d958 | 792 | &dev_attr_busnum.attr, |
1da177e4 | 793 | &dev_attr_devnum.attr, |
9af23624 | 794 | &dev_attr_devpath.attr, |
1da177e4 LT |
795 | &dev_attr_version.attr, |
796 | &dev_attr_maxchild.attr, | |
7ceec1f1 | 797 | &dev_attr_quirks.attr, |
ef955341 | 798 | &dev_attr_avoid_reset_quirk.attr, |
e03f2e8a | 799 | &dev_attr_authorized.attr, |
253e0572 | 800 | &dev_attr_remove.attr, |
0846e7e9 | 801 | &dev_attr_removable.attr, |
024f117c | 802 | &dev_attr_ltm_capable.attr, |
51fa9147 VK |
803 | #ifdef CONFIG_OF |
804 | &dev_attr_devspec.attr, | |
805 | #endif | |
1da177e4 LT |
806 | NULL, |
807 | }; | |
808 | static struct attribute_group dev_attr_grp = { | |
809 | .attrs = dev_attrs, | |
810 | }; | |
811 | ||
2e5f10e4 AS |
812 | /* When modifying this list, be sure to modify dev_string_attrs_are_visible() |
813 | * accordingly. | |
814 | */ | |
815 | static struct attribute *dev_string_attrs[] = { | |
816 | &dev_attr_manufacturer.attr, | |
817 | &dev_attr_product.attr, | |
818 | &dev_attr_serial.attr, | |
819 | NULL | |
820 | }; | |
821 | ||
587a1f16 | 822 | static umode_t dev_string_attrs_are_visible(struct kobject *kobj, |
2e5f10e4 AS |
823 | struct attribute *a, int n) |
824 | { | |
a864e3aa HS |
825 | struct device *dev = container_of(kobj, struct device, kobj); |
826 | struct usb_device *udev = to_usb_device(dev); | |
2e5f10e4 AS |
827 | |
828 | if (a == &dev_attr_manufacturer.attr) { | |
829 | if (udev->manufacturer == NULL) | |
830 | return 0; | |
831 | } else if (a == &dev_attr_product.attr) { | |
832 | if (udev->product == NULL) | |
833 | return 0; | |
834 | } else if (a == &dev_attr_serial.attr) { | |
835 | if (udev->serial == NULL) | |
836 | return 0; | |
837 | } | |
838 | return a->mode; | |
839 | } | |
840 | ||
841 | static struct attribute_group dev_string_attr_grp = { | |
842 | .attrs = dev_string_attrs, | |
843 | .is_visible = dev_string_attrs_are_visible, | |
844 | }; | |
845 | ||
a4dbd674 | 846 | const struct attribute_group *usb_device_groups[] = { |
2e5f10e4 AS |
847 | &dev_attr_grp, |
848 | &dev_string_attr_grp, | |
849 | NULL | |
850 | }; | |
851 | ||
69d42a78 AS |
852 | /* Binary descriptors */ |
853 | ||
854 | static ssize_t | |
2c3c8bea CW |
855 | read_descriptors(struct file *filp, struct kobject *kobj, |
856 | struct bin_attribute *attr, | |
69d42a78 AS |
857 | char *buf, loff_t off, size_t count) |
858 | { | |
a864e3aa HS |
859 | struct device *dev = container_of(kobj, struct device, kobj); |
860 | struct usb_device *udev = to_usb_device(dev); | |
69d42a78 AS |
861 | size_t nleft = count; |
862 | size_t srclen, n; | |
b4a90d04 | 863 | int cfgno; |
217a9081 | 864 | void *src; |
69d42a78 | 865 | |
217a9081 AS |
866 | /* The binary attribute begins with the device descriptor. |
867 | * Following that are the raw descriptor entries for all the | |
868 | * configurations (config plus subsidiary descriptors). | |
69d42a78 | 869 | */ |
217a9081 AS |
870 | for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations && |
871 | nleft > 0; ++cfgno) { | |
872 | if (cfgno < 0) { | |
873 | src = &udev->descriptor; | |
874 | srclen = sizeof(struct usb_device_descriptor); | |
875 | } else { | |
876 | src = udev->rawdescriptors[cfgno]; | |
877 | srclen = __le16_to_cpu(udev->config[cfgno].desc. | |
878 | wTotalLength); | |
879 | } | |
69d42a78 | 880 | if (off < srclen) { |
217a9081 AS |
881 | n = min(nleft, srclen - (size_t) off); |
882 | memcpy(buf, src + off, n); | |
69d42a78 | 883 | nleft -= n; |
217a9081 AS |
884 | buf += n; |
885 | off = 0; | |
886 | } else { | |
887 | off -= srclen; | |
69d42a78 AS |
888 | } |
889 | } | |
69d42a78 AS |
890 | return count - nleft; |
891 | } | |
892 | ||
893 | static struct bin_attribute dev_bin_attr_descriptors = { | |
894 | .attr = {.name = "descriptors", .mode = 0444}, | |
895 | .read = read_descriptors, | |
896 | .size = 18 + 65535, /* dev descr + max-size raw descriptor */ | |
897 | }; | |
898 | ||
1b21d5e1 | 899 | int usb_create_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
900 | { |
901 | struct device *dev = &udev->dev; | |
1b21d5e1 | 902 | int retval; |
1da177e4 | 903 | |
69d42a78 AS |
904 | retval = device_create_bin_file(dev, &dev_bin_attr_descriptors); |
905 | if (retval) | |
906 | goto error; | |
907 | ||
b41a60ec AS |
908 | retval = add_persist_attributes(dev); |
909 | if (retval) | |
910 | goto error; | |
911 | ||
19c26239 AS |
912 | retval = add_power_attributes(dev); |
913 | if (retval) | |
914 | goto error; | |
3b23dd6f | 915 | return retval; |
1b21d5e1 | 916 | error: |
aa084f3e | 917 | usb_remove_sysfs_dev_files(udev); |
1b21d5e1 | 918 | return retval; |
1da177e4 LT |
919 | } |
920 | ||
9251644a | 921 | void usb_remove_sysfs_dev_files(struct usb_device *udev) |
1da177e4 LT |
922 | { |
923 | struct device *dev = &udev->dev; | |
924 | ||
19c26239 | 925 | remove_power_attributes(dev); |
b41a60ec | 926 | remove_persist_attributes(dev); |
69d42a78 | 927 | device_remove_bin_file(dev, &dev_bin_attr_descriptors); |
1da177e4 LT |
928 | } |
929 | ||
025d4430 | 930 | /* Interface Association Descriptor fields */ |
165fe97e CN |
931 | #define usb_intf_assoc_attr(field, format_string) \ |
932 | static ssize_t \ | |
d03f254f | 933 | iad_##field##_show(struct device *dev, struct device_attribute *attr, \ |
165fe97e CN |
934 | char *buf) \ |
935 | { \ | |
2c044a48 | 936 | struct usb_interface *intf = to_usb_interface(dev); \ |
165fe97e | 937 | \ |
2c044a48 GKH |
938 | return sprintf(buf, format_string, \ |
939 | intf->intf_assoc->field); \ | |
165fe97e | 940 | } \ |
d03f254f | 941 | static DEVICE_ATTR_RO(iad_##field) |
165fe97e | 942 | |
d03f254f GKH |
943 | usb_intf_assoc_attr(bFirstInterface, "%02x\n"); |
944 | usb_intf_assoc_attr(bInterfaceCount, "%02d\n"); | |
945 | usb_intf_assoc_attr(bFunctionClass, "%02x\n"); | |
946 | usb_intf_assoc_attr(bFunctionSubClass, "%02x\n"); | |
947 | usb_intf_assoc_attr(bFunctionProtocol, "%02x\n"); | |
165fe97e | 948 | |
1da177e4 LT |
949 | /* Interface fields */ |
950 | #define usb_intf_attr(field, format_string) \ | |
951 | static ssize_t \ | |
d03f254f | 952 | field##_show(struct device *dev, struct device_attribute *attr, \ |
b724ae77 | 953 | char *buf) \ |
1da177e4 | 954 | { \ |
9251644a | 955 | struct usb_interface *intf = to_usb_interface(dev); \ |
1da177e4 | 956 | \ |
9251644a | 957 | return sprintf(buf, format_string, \ |
b724ae77 | 958 | intf->cur_altsetting->desc.field); \ |
1da177e4 | 959 | } \ |
d03f254f | 960 | static DEVICE_ATTR_RO(field) |
1da177e4 | 961 | |
d03f254f GKH |
962 | usb_intf_attr(bInterfaceNumber, "%02x\n"); |
963 | usb_intf_attr(bAlternateSetting, "%2d\n"); | |
964 | usb_intf_attr(bNumEndpoints, "%02x\n"); | |
965 | usb_intf_attr(bInterfaceClass, "%02x\n"); | |
966 | usb_intf_attr(bInterfaceSubClass, "%02x\n"); | |
967 | usb_intf_attr(bInterfaceProtocol, "%02x\n"); | |
1da177e4 | 968 | |
d03f254f GKH |
969 | static ssize_t interface_show(struct device *dev, struct device_attribute *attr, |
970 | char *buf) | |
1da177e4 LT |
971 | { |
972 | struct usb_interface *intf; | |
2e5f10e4 | 973 | char *string; |
1da177e4 | 974 | |
9251644a | 975 | intf = to_usb_interface(dev); |
232275a0 | 976 | string = ACCESS_ONCE(intf->cur_altsetting->string); |
2e5f10e4 | 977 | if (!string) |
1da177e4 | 978 | return 0; |
2e5f10e4 | 979 | return sprintf(buf, "%s\n", string); |
1da177e4 | 980 | } |
d03f254f | 981 | static DEVICE_ATTR_RO(interface); |
1da177e4 | 982 | |
d03f254f GKH |
983 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
984 | char *buf) | |
360b52b0 GK |
985 | { |
986 | struct usb_interface *intf; | |
987 | struct usb_device *udev; | |
7521803d | 988 | struct usb_host_interface *alt; |
360b52b0 GK |
989 | |
990 | intf = to_usb_interface(dev); | |
991 | udev = interface_to_usbdev(intf); | |
232275a0 | 992 | alt = ACCESS_ONCE(intf->cur_altsetting); |
7521803d GKH |
993 | |
994 | return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X" | |
81df2d59 | 995 | "ic%02Xisc%02Xip%02Xin%02X\n", |
7521803d GKH |
996 | le16_to_cpu(udev->descriptor.idVendor), |
997 | le16_to_cpu(udev->descriptor.idProduct), | |
998 | le16_to_cpu(udev->descriptor.bcdDevice), | |
999 | udev->descriptor.bDeviceClass, | |
1000 | udev->descriptor.bDeviceSubClass, | |
1001 | udev->descriptor.bDeviceProtocol, | |
1002 | alt->desc.bInterfaceClass, | |
1003 | alt->desc.bInterfaceSubClass, | |
81df2d59 BM |
1004 | alt->desc.bInterfaceProtocol, |
1005 | alt->desc.bInterfaceNumber); | |
360b52b0 | 1006 | } |
d03f254f | 1007 | static DEVICE_ATTR_RO(modalias); |
360b52b0 | 1008 | |
d03f254f GKH |
1009 | static ssize_t supports_autosuspend_show(struct device *dev, |
1010 | struct device_attribute *attr, | |
1011 | char *buf) | |
49e7cc84 | 1012 | { |
232275a0 | 1013 | int s; |
49e7cc84 | 1014 | |
7dd9cba5 ON |
1015 | s = device_lock_interruptible(dev); |
1016 | if (s < 0) | |
1017 | return -EINTR; | |
49e7cc84 | 1018 | /* Devices will be autosuspended even when an interface isn't claimed */ |
232275a0 AS |
1019 | s = (!dev->driver || to_usb_driver(dev->driver)->supports_autosuspend); |
1020 | device_unlock(dev); | |
49e7cc84 | 1021 | |
232275a0 | 1022 | return sprintf(buf, "%u\n", s); |
49e7cc84 | 1023 | } |
d03f254f | 1024 | static DEVICE_ATTR_RO(supports_autosuspend); |
49e7cc84 | 1025 | |
310d2b41 SK |
1026 | /* |
1027 | * interface_authorized_show - show authorization status of an USB interface | |
1028 | * 1 is authorized, 0 is deauthorized | |
1029 | */ | |
1030 | static ssize_t interface_authorized_show(struct device *dev, | |
1031 | struct device_attribute *attr, char *buf) | |
1032 | { | |
1033 | struct usb_interface *intf = to_usb_interface(dev); | |
1034 | ||
1035 | return sprintf(buf, "%u\n", intf->authorized); | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * interface_authorized_store - authorize or deauthorize an USB interface | |
1040 | */ | |
1041 | static ssize_t interface_authorized_store(struct device *dev, | |
1042 | struct device_attribute *attr, const char *buf, size_t count) | |
1043 | { | |
1044 | struct usb_interface *intf = to_usb_interface(dev); | |
1045 | bool val; | |
1046 | ||
1047 | if (strtobool(buf, &val) != 0) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | if (val) | |
1051 | usb_authorize_interface(intf); | |
1052 | else | |
1053 | usb_deauthorize_interface(intf); | |
1054 | ||
1055 | return count; | |
1056 | } | |
1057 | static struct device_attribute dev_attr_interface_authorized = | |
1058 | __ATTR(authorized, S_IRUGO | S_IWUSR, | |
1059 | interface_authorized_show, interface_authorized_store); | |
1060 | ||
1da177e4 LT |
1061 | static struct attribute *intf_attrs[] = { |
1062 | &dev_attr_bInterfaceNumber.attr, | |
1063 | &dev_attr_bAlternateSetting.attr, | |
1064 | &dev_attr_bNumEndpoints.attr, | |
1065 | &dev_attr_bInterfaceClass.attr, | |
1066 | &dev_attr_bInterfaceSubClass.attr, | |
1067 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 1068 | &dev_attr_modalias.attr, |
49e7cc84 | 1069 | &dev_attr_supports_autosuspend.attr, |
310d2b41 | 1070 | &dev_attr_interface_authorized.attr, |
1da177e4 LT |
1071 | NULL, |
1072 | }; | |
1073 | static struct attribute_group intf_attr_grp = { | |
1074 | .attrs = intf_attrs, | |
1075 | }; | |
1076 | ||
2e5f10e4 AS |
1077 | static struct attribute *intf_assoc_attrs[] = { |
1078 | &dev_attr_iad_bFirstInterface.attr, | |
1079 | &dev_attr_iad_bInterfaceCount.attr, | |
1080 | &dev_attr_iad_bFunctionClass.attr, | |
1081 | &dev_attr_iad_bFunctionSubClass.attr, | |
1082 | &dev_attr_iad_bFunctionProtocol.attr, | |
1083 | NULL, | |
1084 | }; | |
1085 | ||
587a1f16 | 1086 | static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj, |
2e5f10e4 AS |
1087 | struct attribute *a, int n) |
1088 | { | |
a864e3aa HS |
1089 | struct device *dev = container_of(kobj, struct device, kobj); |
1090 | struct usb_interface *intf = to_usb_interface(dev); | |
2e5f10e4 AS |
1091 | |
1092 | if (intf->intf_assoc == NULL) | |
1093 | return 0; | |
1094 | return a->mode; | |
1095 | } | |
1096 | ||
1097 | static struct attribute_group intf_assoc_attr_grp = { | |
1098 | .attrs = intf_assoc_attrs, | |
1099 | .is_visible = intf_assoc_attrs_are_visible, | |
1100 | }; | |
1101 | ||
a4dbd674 | 1102 | const struct attribute_group *usb_interface_groups[] = { |
2e5f10e4 AS |
1103 | &intf_attr_grp, |
1104 | &intf_assoc_attr_grp, | |
1105 | NULL | |
1106 | }; | |
1107 | ||
643de624 | 1108 | void usb_create_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 1109 | { |
4f62efe6 AS |
1110 | struct usb_device *udev = interface_to_usbdev(intf); |
1111 | struct usb_host_interface *alt = intf->cur_altsetting; | |
1112 | ||
352d0263 | 1113 | if (intf->sysfs_files_created || intf->unregistering) |
643de624 | 1114 | return; |
1da177e4 | 1115 | |
643de624 | 1116 | if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS)) |
4f62efe6 | 1117 | alt->string = usb_cache_string(udev, alt->desc.iInterface); |
643de624 MN |
1118 | if (alt->string && device_create_file(&intf->dev, &dev_attr_interface)) |
1119 | ; /* We don't actually care if the function fails. */ | |
7e61559f | 1120 | intf->sysfs_files_created = 1; |
1da177e4 LT |
1121 | } |
1122 | ||
9251644a | 1123 | void usb_remove_sysfs_intf_files(struct usb_interface *intf) |
1da177e4 | 1124 | { |
7e61559f AS |
1125 | if (!intf->sysfs_files_created) |
1126 | return; | |
92b0da15 | 1127 | |
92b0da15 | 1128 | device_remove_file(&intf->dev, &dev_attr_interface); |
7e61559f | 1129 | intf->sysfs_files_created = 0; |
1da177e4 | 1130 | } |