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15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/usb.h>
18#include <linux/usb/quirks.h>
19#include <linux/of.h>
20#include "usb.h"
21
22
23#define usb_actconfig_show(field, format_string) \
24static ssize_t field##_show(struct device *dev, \
25 struct device_attribute *attr, char *buf) \
26{ \
27 struct usb_device *udev; \
28 struct usb_host_config *actconfig; \
29 ssize_t rc; \
30 \
31 udev = to_usb_device(dev); \
32 rc = usb_lock_device_interruptible(udev); \
33 if (rc < 0) \
34 return -EINTR; \
35 actconfig = udev->actconfig; \
36 if (actconfig) \
37 rc = sprintf(buf, format_string, \
38 actconfig->desc.field); \
39 usb_unlock_device(udev); \
40 return rc; \
41} \
42
43#define usb_actconfig_attr(field, format_string) \
44 usb_actconfig_show(field, format_string) \
45 static DEVICE_ATTR_RO(field)
46
47usb_actconfig_attr(bNumInterfaces, "%2d\n");
48usb_actconfig_attr(bmAttributes, "%2x\n");
49
50static ssize_t bMaxPower_show(struct device *dev,
51 struct device_attribute *attr, char *buf)
52{
53 struct usb_device *udev;
54 struct usb_host_config *actconfig;
55 ssize_t rc;
56
57 udev = to_usb_device(dev);
58 rc = usb_lock_device_interruptible(udev);
59 if (rc < 0)
60 return -EINTR;
61 actconfig = udev->actconfig;
62 if (actconfig)
63 rc = sprintf(buf, "%dmA\n", usb_get_max_power(udev, actconfig));
64 usb_unlock_device(udev);
65 return rc;
66}
67static DEVICE_ATTR_RO(bMaxPower);
68
69static ssize_t configuration_show(struct device *dev,
70 struct device_attribute *attr, char *buf)
71{
72 struct usb_device *udev;
73 struct usb_host_config *actconfig;
74 ssize_t rc;
75
76 udev = to_usb_device(dev);
77 rc = usb_lock_device_interruptible(udev);
78 if (rc < 0)
79 return -EINTR;
80 actconfig = udev->actconfig;
81 if (actconfig && actconfig->string)
82 rc = sprintf(buf, "%s\n", actconfig->string);
83 usb_unlock_device(udev);
84 return rc;
85}
86static DEVICE_ATTR_RO(configuration);
87
88
89usb_actconfig_show(bConfigurationValue, "%u\n");
90
91static ssize_t bConfigurationValue_store(struct device *dev,
92 struct device_attribute *attr,
93 const char *buf, size_t count)
94{
95 struct usb_device *udev = to_usb_device(dev);
96 int config, value, rc;
97
98 if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255)
99 return -EINVAL;
100 rc = usb_lock_device_interruptible(udev);
101 if (rc < 0)
102 return -EINTR;
103 value = usb_set_configuration(udev, config);
104 usb_unlock_device(udev);
105 return (value < 0) ? value : count;
106}
107static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR,
108 bConfigurationValue_show, bConfigurationValue_store);
109
110#ifdef CONFIG_OF
111static 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, "%pOF\n", of_node);
117}
118static DEVICE_ATTR_RO(devspec);
119#endif
120
121
122#define usb_string_attr(name) \
123static ssize_t name##_show(struct device *dev, \
124 struct device_attribute *attr, char *buf) \
125{ \
126 struct usb_device *udev; \
127 int retval; \
128 \
129 udev = to_usb_device(dev); \
130 retval = usb_lock_device_interruptible(udev); \
131 if (retval < 0) \
132 return -EINTR; \
133 retval = sprintf(buf, "%s\n", udev->name); \
134 usb_unlock_device(udev); \
135 return retval; \
136} \
137static DEVICE_ATTR_RO(name)
138
139usb_string_attr(product);
140usb_string_attr(manufacturer);
141usb_string_attr(serial);
142
143static ssize_t speed_show(struct device *dev, struct device_attribute *attr,
144 char *buf)
145{
146 struct usb_device *udev;
147 char *speed;
148
149 udev = to_usb_device(dev);
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;
162 case USB_SPEED_WIRELESS:
163 speed = "480";
164 break;
165 case USB_SPEED_SUPER:
166 speed = "5000";
167 break;
168 case USB_SPEED_SUPER_PLUS:
169 speed = "10000";
170 break;
171 default:
172 speed = "unknown";
173 }
174 return sprintf(buf, "%s\n", speed);
175}
176static DEVICE_ATTR_RO(speed);
177
178static ssize_t rx_lanes_show(struct device *dev, struct device_attribute *attr,
179 char *buf)
180{
181 struct usb_device *udev;
182
183 udev = to_usb_device(dev);
184 return sprintf(buf, "%d\n", udev->rx_lanes);
185}
186static DEVICE_ATTR_RO(rx_lanes);
187
188static ssize_t tx_lanes_show(struct device *dev, struct device_attribute *attr,
189 char *buf)
190{
191 struct usb_device *udev;
192
193 udev = to_usb_device(dev);
194 return sprintf(buf, "%d\n", udev->tx_lanes);
195}
196static DEVICE_ATTR_RO(tx_lanes);
197
198static ssize_t busnum_show(struct device *dev, struct device_attribute *attr,
199 char *buf)
200{
201 struct usb_device *udev;
202
203 udev = to_usb_device(dev);
204 return sprintf(buf, "%d\n", udev->bus->busnum);
205}
206static DEVICE_ATTR_RO(busnum);
207
208static ssize_t devnum_show(struct device *dev, struct device_attribute *attr,
209 char *buf)
210{
211 struct usb_device *udev;
212
213 udev = to_usb_device(dev);
214 return sprintf(buf, "%d\n", udev->devnum);
215}
216static DEVICE_ATTR_RO(devnum);
217
218static ssize_t devpath_show(struct device *dev, struct device_attribute *attr,
219 char *buf)
220{
221 struct usb_device *udev;
222
223 udev = to_usb_device(dev);
224 return sprintf(buf, "%s\n", udev->devpath);
225}
226static DEVICE_ATTR_RO(devpath);
227
228static ssize_t version_show(struct device *dev, struct device_attribute *attr,
229 char *buf)
230{
231 struct usb_device *udev;
232 u16 bcdUSB;
233
234 udev = to_usb_device(dev);
235 bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
236 return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
237}
238static DEVICE_ATTR_RO(version);
239
240static ssize_t maxchild_show(struct device *dev, struct device_attribute *attr,
241 char *buf)
242{
243 struct usb_device *udev;
244
245 udev = to_usb_device(dev);
246 return sprintf(buf, "%d\n", udev->maxchild);
247}
248static DEVICE_ATTR_RO(maxchild);
249
250static ssize_t quirks_show(struct device *dev, struct device_attribute *attr,
251 char *buf)
252{
253 struct usb_device *udev;
254
255 udev = to_usb_device(dev);
256 return sprintf(buf, "0x%x\n", udev->quirks);
257}
258static DEVICE_ATTR_RO(quirks);
259
260static ssize_t avoid_reset_quirk_show(struct device *dev,
261 struct device_attribute *attr, char *buf)
262{
263 struct usb_device *udev;
264
265 udev = to_usb_device(dev);
266 return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET));
267}
268
269static ssize_t avoid_reset_quirk_store(struct device *dev,
270 struct device_attribute *attr,
271 const char *buf, size_t count)
272{
273 struct usb_device *udev = to_usb_device(dev);
274 int val, rc;
275
276 if (sscanf(buf, "%d", &val) != 1 || val < 0 || val > 1)
277 return -EINVAL;
278 rc = usb_lock_device_interruptible(udev);
279 if (rc < 0)
280 return -EINTR;
281 if (val)
282 udev->quirks |= USB_QUIRK_RESET;
283 else
284 udev->quirks &= ~USB_QUIRK_RESET;
285 usb_unlock_device(udev);
286 return count;
287}
288static DEVICE_ATTR_RW(avoid_reset_quirk);
289
290static ssize_t urbnum_show(struct device *dev, struct device_attribute *attr,
291 char *buf)
292{
293 struct usb_device *udev;
294
295 udev = to_usb_device(dev);
296 return sprintf(buf, "%d\n", atomic_read(&udev->urbnum));
297}
298static DEVICE_ATTR_RO(urbnum);
299
300static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
301 char *buf)
302{
303 struct usb_device *udev;
304 char *state;
305
306 udev = to_usb_device(dev);
307
308 switch (udev->removable) {
309 case USB_DEVICE_REMOVABLE:
310 state = "removable";
311 break;
312 case USB_DEVICE_FIXED:
313 state = "fixed";
314 break;
315 default:
316 state = "unknown";
317 }
318
319 return sprintf(buf, "%s\n", state);
320}
321static DEVICE_ATTR_RO(removable);
322
323static ssize_t ltm_capable_show(struct device *dev,
324 struct device_attribute *attr, char *buf)
325{
326 if (usb_device_supports_ltm(to_usb_device(dev)))
327 return sprintf(buf, "%s\n", "yes");
328 return sprintf(buf, "%s\n", "no");
329}
330static DEVICE_ATTR_RO(ltm_capable);
331
332#ifdef CONFIG_PM
333
334static ssize_t persist_show(struct device *dev, struct device_attribute *attr,
335 char *buf)
336{
337 struct usb_device *udev = to_usb_device(dev);
338
339 return sprintf(buf, "%d\n", udev->persist_enabled);
340}
341
342static ssize_t persist_store(struct device *dev, struct device_attribute *attr,
343 const char *buf, size_t count)
344{
345 struct usb_device *udev = to_usb_device(dev);
346 int value, rc;
347
348
349 if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
350 return -EPERM;
351
352 if (sscanf(buf, "%d", &value) != 1)
353 return -EINVAL;
354
355 rc = usb_lock_device_interruptible(udev);
356 if (rc < 0)
357 return -EINTR;
358 udev->persist_enabled = !!value;
359 usb_unlock_device(udev);
360 return count;
361}
362static DEVICE_ATTR_RW(persist);
363
364static int add_persist_attributes(struct device *dev)
365{
366 int rc = 0;
367
368 if (is_usb_device(dev)) {
369 struct usb_device *udev = to_usb_device(dev);
370
371
372
373
374 if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
375 rc = sysfs_add_file_to_group(&dev->kobj,
376 &dev_attr_persist.attr,
377 power_group_name);
378 }
379 return rc;
380}
381
382static void remove_persist_attributes(struct device *dev)
383{
384 sysfs_remove_file_from_group(&dev->kobj,
385 &dev_attr_persist.attr,
386 power_group_name);
387}
388
389static ssize_t connected_duration_show(struct device *dev,
390 struct device_attribute *attr, char *buf)
391{
392 struct usb_device *udev = to_usb_device(dev);
393
394 return sprintf(buf, "%u\n",
395 jiffies_to_msecs(jiffies - udev->connect_time));
396}
397static DEVICE_ATTR_RO(connected_duration);
398
399
400
401
402
403
404
405
406static ssize_t active_duration_show(struct device *dev,
407 struct device_attribute *attr, char *buf)
408{
409 struct usb_device *udev = to_usb_device(dev);
410 int duration;
411
412 if (udev->state != USB_STATE_SUSPENDED)
413 duration = jiffies_to_msecs(jiffies + udev->active_duration);
414 else
415 duration = jiffies_to_msecs(udev->active_duration);
416 return sprintf(buf, "%u\n", duration);
417}
418static DEVICE_ATTR_RO(active_duration);
419
420static ssize_t autosuspend_show(struct device *dev,
421 struct device_attribute *attr, char *buf)
422{
423 return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000);
424}
425
426static ssize_t autosuspend_store(struct device *dev,
427 struct device_attribute *attr, const char *buf,
428 size_t count)
429{
430 int value;
431
432 if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 ||
433 value <= -INT_MAX/1000)
434 return -EINVAL;
435
436 pm_runtime_set_autosuspend_delay(dev, value * 1000);
437 return count;
438}
439static DEVICE_ATTR_RW(autosuspend);
440
441static const char on_string[] = "on";
442static const char auto_string[] = "auto";
443
444static void warn_level(void)
445{
446 static int level_warned;
447
448 if (!level_warned) {
449 level_warned = 1;
450 printk(KERN_WARNING "WARNING! power/level is deprecated; "
451 "use power/control instead\n");
452 }
453}
454
455static ssize_t level_show(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 struct usb_device *udev = to_usb_device(dev);
459 const char *p = auto_string;
460
461 warn_level();
462 if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto)
463 p = on_string;
464 return sprintf(buf, "%s\n", p);
465}
466
467static ssize_t level_store(struct device *dev, struct device_attribute *attr,
468 const char *buf, size_t count)
469{
470 struct usb_device *udev = to_usb_device(dev);
471 int len = count;
472 char *cp;
473 int rc = count;
474 int rv;
475
476 warn_level();
477 cp = memchr(buf, '\n', count);
478 if (cp)
479 len = cp - buf;
480
481 rv = usb_lock_device_interruptible(udev);
482 if (rv < 0)
483 return -EINTR;
484
485 if (len == sizeof on_string - 1 &&
486 strncmp(buf, on_string, len) == 0)
487 usb_disable_autosuspend(udev);
488
489 else if (len == sizeof auto_string - 1 &&
490 strncmp(buf, auto_string, len) == 0)
491 usb_enable_autosuspend(udev);
492
493 else
494 rc = -EINVAL;
495
496 usb_unlock_device(udev);
497 return rc;
498}
499static DEVICE_ATTR_RW(level);
500
501static ssize_t usb2_hardware_lpm_show(struct device *dev,
502 struct device_attribute *attr, char *buf)
503{
504 struct usb_device *udev = to_usb_device(dev);
505 const char *p;
506
507 if (udev->usb2_hw_lpm_allowed == 1)
508 p = "enabled";
509 else
510 p = "disabled";
511
512 return sprintf(buf, "%s\n", p);
513}
514
515static ssize_t usb2_hardware_lpm_store(struct device *dev,
516 struct device_attribute *attr,
517 const char *buf, size_t count)
518{
519 struct usb_device *udev = to_usb_device(dev);
520 bool value;
521 int ret;
522
523 ret = usb_lock_device_interruptible(udev);
524 if (ret < 0)
525 return -EINTR;
526
527 ret = strtobool(buf, &value);
528
529 if (!ret) {
530 udev->usb2_hw_lpm_allowed = value;
531 ret = usb_set_usb2_hardware_lpm(udev, value);
532 }
533
534 usb_unlock_device(udev);
535
536 if (!ret)
537 return count;
538
539 return ret;
540}
541static DEVICE_ATTR_RW(usb2_hardware_lpm);
542
543static ssize_t usb2_lpm_l1_timeout_show(struct device *dev,
544 struct device_attribute *attr,
545 char *buf)
546{
547 struct usb_device *udev = to_usb_device(dev);
548 return sprintf(buf, "%d\n", udev->l1_params.timeout);
549}
550
551static ssize_t usb2_lpm_l1_timeout_store(struct device *dev,
552 struct device_attribute *attr,
553 const char *buf, size_t count)
554{
555 struct usb_device *udev = to_usb_device(dev);
556 u16 timeout;
557
558 if (kstrtou16(buf, 0, &timeout))
559 return -EINVAL;
560
561 udev->l1_params.timeout = timeout;
562
563 return count;
564}
565static DEVICE_ATTR_RW(usb2_lpm_l1_timeout);
566
567static ssize_t usb2_lpm_besl_show(struct device *dev,
568 struct device_attribute *attr, char *buf)
569{
570 struct usb_device *udev = to_usb_device(dev);
571 return sprintf(buf, "%d\n", udev->l1_params.besl);
572}
573
574static ssize_t usb2_lpm_besl_store(struct device *dev,
575 struct device_attribute *attr,
576 const char *buf, size_t count)
577{
578 struct usb_device *udev = to_usb_device(dev);
579 u8 besl;
580
581 if (kstrtou8(buf, 0, &besl) || besl > 15)
582 return -EINVAL;
583
584 udev->l1_params.besl = besl;
585
586 return count;
587}
588static DEVICE_ATTR_RW(usb2_lpm_besl);
589
590static ssize_t usb3_hardware_lpm_u1_show(struct device *dev,
591 struct device_attribute *attr, char *buf)
592{
593 struct usb_device *udev = to_usb_device(dev);
594 const char *p;
595 int rc;
596
597 rc = usb_lock_device_interruptible(udev);
598 if (rc < 0)
599 return -EINTR;
600
601 if (udev->usb3_lpm_u1_enabled)
602 p = "enabled";
603 else
604 p = "disabled";
605
606 usb_unlock_device(udev);
607
608 return sprintf(buf, "%s\n", p);
609}
610static DEVICE_ATTR_RO(usb3_hardware_lpm_u1);
611
612static ssize_t usb3_hardware_lpm_u2_show(struct device *dev,
613 struct device_attribute *attr, char *buf)
614{
615 struct usb_device *udev = to_usb_device(dev);
616 const char *p;
617 int rc;
618
619 rc = usb_lock_device_interruptible(udev);
620 if (rc < 0)
621 return -EINTR;
622
623 if (udev->usb3_lpm_u2_enabled)
624 p = "enabled";
625 else
626 p = "disabled";
627
628 usb_unlock_device(udev);
629
630 return sprintf(buf, "%s\n", p);
631}
632static DEVICE_ATTR_RO(usb3_hardware_lpm_u2);
633
634static struct attribute *usb2_hardware_lpm_attr[] = {
635 &dev_attr_usb2_hardware_lpm.attr,
636 &dev_attr_usb2_lpm_l1_timeout.attr,
637 &dev_attr_usb2_lpm_besl.attr,
638 NULL,
639};
640static struct attribute_group usb2_hardware_lpm_attr_group = {
641 .name = power_group_name,
642 .attrs = usb2_hardware_lpm_attr,
643};
644
645static struct attribute *usb3_hardware_lpm_attr[] = {
646 &dev_attr_usb3_hardware_lpm_u1.attr,
647 &dev_attr_usb3_hardware_lpm_u2.attr,
648 NULL,
649};
650static struct attribute_group usb3_hardware_lpm_attr_group = {
651 .name = power_group_name,
652 .attrs = usb3_hardware_lpm_attr,
653};
654
655static struct attribute *power_attrs[] = {
656 &dev_attr_autosuspend.attr,
657 &dev_attr_level.attr,
658 &dev_attr_connected_duration.attr,
659 &dev_attr_active_duration.attr,
660 NULL,
661};
662static struct attribute_group power_attr_group = {
663 .name = power_group_name,
664 .attrs = power_attrs,
665};
666
667static int add_power_attributes(struct device *dev)
668{
669 int rc = 0;
670
671 if (is_usb_device(dev)) {
672 struct usb_device *udev = to_usb_device(dev);
673 rc = sysfs_merge_group(&dev->kobj, &power_attr_group);
674 if (udev->usb2_hw_lpm_capable == 1)
675 rc = sysfs_merge_group(&dev->kobj,
676 &usb2_hardware_lpm_attr_group);
677 if ((udev->speed == USB_SPEED_SUPER ||
678 udev->speed == USB_SPEED_SUPER_PLUS) &&
679 udev->lpm_capable == 1)
680 rc = sysfs_merge_group(&dev->kobj,
681 &usb3_hardware_lpm_attr_group);
682 }
683
684 return rc;
685}
686
687static void remove_power_attributes(struct device *dev)
688{
689 sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group);
690 sysfs_unmerge_group(&dev->kobj, &power_attr_group);
691}
692
693#else
694
695#define add_persist_attributes(dev) 0
696#define remove_persist_attributes(dev) do {} while (0)
697
698#define add_power_attributes(dev) 0
699#define remove_power_attributes(dev) do {} while (0)
700
701#endif
702
703
704
705#define usb_descriptor_attr_le16(field, format_string) \
706static ssize_t \
707field##_show(struct device *dev, struct device_attribute *attr, \
708 char *buf) \
709{ \
710 struct usb_device *udev; \
711 \
712 udev = to_usb_device(dev); \
713 return sprintf(buf, format_string, \
714 le16_to_cpu(udev->descriptor.field)); \
715} \
716static DEVICE_ATTR_RO(field)
717
718usb_descriptor_attr_le16(idVendor, "%04x\n");
719usb_descriptor_attr_le16(idProduct, "%04x\n");
720usb_descriptor_attr_le16(bcdDevice, "%04x\n");
721
722#define usb_descriptor_attr(field, format_string) \
723static ssize_t \
724field##_show(struct device *dev, struct device_attribute *attr, \
725 char *buf) \
726{ \
727 struct usb_device *udev; \
728 \
729 udev = to_usb_device(dev); \
730 return sprintf(buf, format_string, udev->descriptor.field); \
731} \
732static DEVICE_ATTR_RO(field)
733
734usb_descriptor_attr(bDeviceClass, "%02x\n");
735usb_descriptor_attr(bDeviceSubClass, "%02x\n");
736usb_descriptor_attr(bDeviceProtocol, "%02x\n");
737usb_descriptor_attr(bNumConfigurations, "%d\n");
738usb_descriptor_attr(bMaxPacketSize0, "%d\n");
739
740
741
742static ssize_t authorized_show(struct device *dev,
743 struct device_attribute *attr, char *buf)
744{
745 struct usb_device *usb_dev = to_usb_device(dev);
746 return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
747}
748
749
750
751
752
753
754static ssize_t authorized_store(struct device *dev,
755 struct device_attribute *attr, const char *buf,
756 size_t size)
757{
758 ssize_t result;
759 struct usb_device *usb_dev = to_usb_device(dev);
760 unsigned val;
761 result = sscanf(buf, "%u\n", &val);
762 if (result != 1)
763 result = -EINVAL;
764 else if (val == 0)
765 result = usb_deauthorize_device(usb_dev);
766 else
767 result = usb_authorize_device(usb_dev);
768 return result < 0 ? result : size;
769}
770static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, S_IRUGO | S_IWUSR,
771 authorized_show, authorized_store);
772
773
774static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
775 const char *buf, size_t count)
776{
777 struct usb_device *udev = to_usb_device(dev);
778 int rc = 0;
779
780 usb_lock_device(udev);
781 if (udev->state != USB_STATE_NOTATTACHED) {
782
783
784 usb_set_configuration(udev, -1);
785 rc = usb_remove_device(udev);
786 }
787 if (rc == 0)
788 rc = count;
789 usb_unlock_device(udev);
790 return rc;
791}
792static DEVICE_ATTR_IGNORE_LOCKDEP(remove, S_IWUSR, NULL, remove_store);
793
794
795static struct attribute *dev_attrs[] = {
796
797 &dev_attr_configuration.attr,
798 &dev_attr_bNumInterfaces.attr,
799 &dev_attr_bConfigurationValue.attr,
800 &dev_attr_bmAttributes.attr,
801 &dev_attr_bMaxPower.attr,
802
803 &dev_attr_urbnum.attr,
804 &dev_attr_idVendor.attr,
805 &dev_attr_idProduct.attr,
806 &dev_attr_bcdDevice.attr,
807 &dev_attr_bDeviceClass.attr,
808 &dev_attr_bDeviceSubClass.attr,
809 &dev_attr_bDeviceProtocol.attr,
810 &dev_attr_bNumConfigurations.attr,
811 &dev_attr_bMaxPacketSize0.attr,
812 &dev_attr_speed.attr,
813 &dev_attr_rx_lanes.attr,
814 &dev_attr_tx_lanes.attr,
815 &dev_attr_busnum.attr,
816 &dev_attr_devnum.attr,
817 &dev_attr_devpath.attr,
818 &dev_attr_version.attr,
819 &dev_attr_maxchild.attr,
820 &dev_attr_quirks.attr,
821 &dev_attr_avoid_reset_quirk.attr,
822 &dev_attr_authorized.attr,
823 &dev_attr_remove.attr,
824 &dev_attr_removable.attr,
825 &dev_attr_ltm_capable.attr,
826#ifdef CONFIG_OF
827 &dev_attr_devspec.attr,
828#endif
829 NULL,
830};
831static struct attribute_group dev_attr_grp = {
832 .attrs = dev_attrs,
833};
834
835
836
837
838static struct attribute *dev_string_attrs[] = {
839 &dev_attr_manufacturer.attr,
840 &dev_attr_product.attr,
841 &dev_attr_serial.attr,
842 NULL
843};
844
845static umode_t dev_string_attrs_are_visible(struct kobject *kobj,
846 struct attribute *a, int n)
847{
848 struct device *dev = container_of(kobj, struct device, kobj);
849 struct usb_device *udev = to_usb_device(dev);
850
851 if (a == &dev_attr_manufacturer.attr) {
852 if (udev->manufacturer == NULL)
853 return 0;
854 } else if (a == &dev_attr_product.attr) {
855 if (udev->product == NULL)
856 return 0;
857 } else if (a == &dev_attr_serial.attr) {
858 if (udev->serial == NULL)
859 return 0;
860 }
861 return a->mode;
862}
863
864static struct attribute_group dev_string_attr_grp = {
865 .attrs = dev_string_attrs,
866 .is_visible = dev_string_attrs_are_visible,
867};
868
869const struct attribute_group *usb_device_groups[] = {
870 &dev_attr_grp,
871 &dev_string_attr_grp,
872 NULL
873};
874
875
876
877static ssize_t
878read_descriptors(struct file *filp, struct kobject *kobj,
879 struct bin_attribute *attr,
880 char *buf, loff_t off, size_t count)
881{
882 struct device *dev = container_of(kobj, struct device, kobj);
883 struct usb_device *udev = to_usb_device(dev);
884 size_t nleft = count;
885 size_t srclen, n;
886 int cfgno;
887 void *src;
888
889
890
891
892
893 for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations &&
894 nleft > 0; ++cfgno) {
895 if (cfgno < 0) {
896 src = &udev->descriptor;
897 srclen = sizeof(struct usb_device_descriptor);
898 } else {
899 src = udev->rawdescriptors[cfgno];
900 srclen = __le16_to_cpu(udev->config[cfgno].desc.
901 wTotalLength);
902 }
903 if (off < srclen) {
904 n = min(nleft, srclen - (size_t) off);
905 memcpy(buf, src + off, n);
906 nleft -= n;
907 buf += n;
908 off = 0;
909 } else {
910 off -= srclen;
911 }
912 }
913 return count - nleft;
914}
915
916static struct bin_attribute dev_bin_attr_descriptors = {
917 .attr = {.name = "descriptors", .mode = 0444},
918 .read = read_descriptors,
919 .size = 18 + 65535,
920};
921
922int usb_create_sysfs_dev_files(struct usb_device *udev)
923{
924 struct device *dev = &udev->dev;
925 int retval;
926
927 retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
928 if (retval)
929 goto error;
930
931 retval = add_persist_attributes(dev);
932 if (retval)
933 goto error;
934
935 retval = add_power_attributes(dev);
936 if (retval)
937 goto error;
938 return retval;
939error:
940 usb_remove_sysfs_dev_files(udev);
941 return retval;
942}
943
944void usb_remove_sysfs_dev_files(struct usb_device *udev)
945{
946 struct device *dev = &udev->dev;
947
948 remove_power_attributes(dev);
949 remove_persist_attributes(dev);
950 device_remove_bin_file(dev, &dev_bin_attr_descriptors);
951}
952
953
954#define usb_intf_assoc_attr(field, format_string) \
955static ssize_t \
956iad_##field##_show(struct device *dev, struct device_attribute *attr, \
957 char *buf) \
958{ \
959 struct usb_interface *intf = to_usb_interface(dev); \
960 \
961 return sprintf(buf, format_string, \
962 intf->intf_assoc->field); \
963} \
964static DEVICE_ATTR_RO(iad_##field)
965
966usb_intf_assoc_attr(bFirstInterface, "%02x\n");
967usb_intf_assoc_attr(bInterfaceCount, "%02d\n");
968usb_intf_assoc_attr(bFunctionClass, "%02x\n");
969usb_intf_assoc_attr(bFunctionSubClass, "%02x\n");
970usb_intf_assoc_attr(bFunctionProtocol, "%02x\n");
971
972
973#define usb_intf_attr(field, format_string) \
974static ssize_t \
975field##_show(struct device *dev, struct device_attribute *attr, \
976 char *buf) \
977{ \
978 struct usb_interface *intf = to_usb_interface(dev); \
979 \
980 return sprintf(buf, format_string, \
981 intf->cur_altsetting->desc.field); \
982} \
983static DEVICE_ATTR_RO(field)
984
985usb_intf_attr(bInterfaceNumber, "%02x\n");
986usb_intf_attr(bAlternateSetting, "%2d\n");
987usb_intf_attr(bNumEndpoints, "%02x\n");
988usb_intf_attr(bInterfaceClass, "%02x\n");
989usb_intf_attr(bInterfaceSubClass, "%02x\n");
990usb_intf_attr(bInterfaceProtocol, "%02x\n");
991
992static ssize_t interface_show(struct device *dev, struct device_attribute *attr,
993 char *buf)
994{
995 struct usb_interface *intf;
996 char *string;
997
998 intf = to_usb_interface(dev);
999 string = READ_ONCE(intf->cur_altsetting->string);
1000 if (!string)
1001 return 0;
1002 return sprintf(buf, "%s\n", string);
1003}
1004static DEVICE_ATTR_RO(interface);
1005
1006static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
1007 char *buf)
1008{
1009 struct usb_interface *intf;
1010 struct usb_device *udev;
1011 struct usb_host_interface *alt;
1012
1013 intf = to_usb_interface(dev);
1014 udev = interface_to_usbdev(intf);
1015 alt = READ_ONCE(intf->cur_altsetting);
1016
1017 return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
1018 "ic%02Xisc%02Xip%02Xin%02X\n",
1019 le16_to_cpu(udev->descriptor.idVendor),
1020 le16_to_cpu(udev->descriptor.idProduct),
1021 le16_to_cpu(udev->descriptor.bcdDevice),
1022 udev->descriptor.bDeviceClass,
1023 udev->descriptor.bDeviceSubClass,
1024 udev->descriptor.bDeviceProtocol,
1025 alt->desc.bInterfaceClass,
1026 alt->desc.bInterfaceSubClass,
1027 alt->desc.bInterfaceProtocol,
1028 alt->desc.bInterfaceNumber);
1029}
1030static DEVICE_ATTR_RO(modalias);
1031
1032static ssize_t supports_autosuspend_show(struct device *dev,
1033 struct device_attribute *attr,
1034 char *buf)
1035{
1036 int s;
1037
1038 s = device_lock_interruptible(dev);
1039 if (s < 0)
1040 return -EINTR;
1041
1042 s = (!dev->driver || to_usb_driver(dev->driver)->supports_autosuspend);
1043 device_unlock(dev);
1044
1045 return sprintf(buf, "%u\n", s);
1046}
1047static DEVICE_ATTR_RO(supports_autosuspend);
1048
1049
1050
1051
1052
1053static ssize_t interface_authorized_show(struct device *dev,
1054 struct device_attribute *attr, char *buf)
1055{
1056 struct usb_interface *intf = to_usb_interface(dev);
1057
1058 return sprintf(buf, "%u\n", intf->authorized);
1059}
1060
1061
1062
1063
1064static ssize_t interface_authorized_store(struct device *dev,
1065 struct device_attribute *attr, const char *buf, size_t count)
1066{
1067 struct usb_interface *intf = to_usb_interface(dev);
1068 bool val;
1069
1070 if (strtobool(buf, &val) != 0)
1071 return -EINVAL;
1072
1073 if (val)
1074 usb_authorize_interface(intf);
1075 else
1076 usb_deauthorize_interface(intf);
1077
1078 return count;
1079}
1080static struct device_attribute dev_attr_interface_authorized =
1081 __ATTR(authorized, S_IRUGO | S_IWUSR,
1082 interface_authorized_show, interface_authorized_store);
1083
1084static struct attribute *intf_attrs[] = {
1085 &dev_attr_bInterfaceNumber.attr,
1086 &dev_attr_bAlternateSetting.attr,
1087 &dev_attr_bNumEndpoints.attr,
1088 &dev_attr_bInterfaceClass.attr,
1089 &dev_attr_bInterfaceSubClass.attr,
1090 &dev_attr_bInterfaceProtocol.attr,
1091 &dev_attr_modalias.attr,
1092 &dev_attr_supports_autosuspend.attr,
1093 &dev_attr_interface_authorized.attr,
1094 NULL,
1095};
1096static struct attribute_group intf_attr_grp = {
1097 .attrs = intf_attrs,
1098};
1099
1100static struct attribute *intf_assoc_attrs[] = {
1101 &dev_attr_iad_bFirstInterface.attr,
1102 &dev_attr_iad_bInterfaceCount.attr,
1103 &dev_attr_iad_bFunctionClass.attr,
1104 &dev_attr_iad_bFunctionSubClass.attr,
1105 &dev_attr_iad_bFunctionProtocol.attr,
1106 NULL,
1107};
1108
1109static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
1110 struct attribute *a, int n)
1111{
1112 struct device *dev = container_of(kobj, struct device, kobj);
1113 struct usb_interface *intf = to_usb_interface(dev);
1114
1115 if (intf->intf_assoc == NULL)
1116 return 0;
1117 return a->mode;
1118}
1119
1120static struct attribute_group intf_assoc_attr_grp = {
1121 .attrs = intf_assoc_attrs,
1122 .is_visible = intf_assoc_attrs_are_visible,
1123};
1124
1125const struct attribute_group *usb_interface_groups[] = {
1126 &intf_attr_grp,
1127 &intf_assoc_attr_grp,
1128 NULL
1129};
1130
1131void usb_create_sysfs_intf_files(struct usb_interface *intf)
1132{
1133 struct usb_device *udev = interface_to_usbdev(intf);
1134 struct usb_host_interface *alt = intf->cur_altsetting;
1135
1136 if (intf->sysfs_files_created || intf->unregistering)
1137 return;
1138
1139 if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
1140 alt->string = usb_cache_string(udev, alt->desc.iInterface);
1141 if (alt->string && device_create_file(&intf->dev, &dev_attr_interface))
1142 ;
1143 intf->sysfs_files_created = 1;
1144}
1145
1146void usb_remove_sysfs_intf_files(struct usb_interface *intf)
1147{
1148 if (!intf->sysfs_files_created)
1149 return;
1150
1151 device_remove_file(&intf->dev, &dev_attr_interface);
1152 intf->sysfs_files_created = 0;
1153}
1154
