2 * drivers/usb/core/sysfs.c
4 * (C) Copyright 2002 David Brownell
5 * (C) Copyright 2002,2004 Greg Kroah-Hartman
6 * (C) Copyright 2002,2004 IBM Corp.
8 * All of the sysfs file attributes for usb devices and interfaces.
13 #include <linux/kernel.h>
14 #include <linux/string.h>
15 #include <linux/usb.h>
16 #include <linux/usb/quirks.h>
19 /* Active configuration fields */
20 #define usb_actconfig_show(field, multiplier, format_string) \
21 static ssize_t show_##field(struct device *dev, \
22 struct device_attribute *attr, char *buf) \
24 struct usb_device *udev; \
25 struct usb_host_config *actconfig; \
27 udev = to_usb_device(dev); \
28 actconfig = udev->actconfig; \
30 return sprintf(buf, format_string, \
31 actconfig->desc.field * multiplier); \
36 #define usb_actconfig_attr(field, multiplier, format_string) \
37 usb_actconfig_show(field, multiplier, format_string) \
38 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
40 usb_actconfig_attr(bNumInterfaces, 1, "%2d\n")
41 usb_actconfig_attr(bmAttributes, 1, "%2x\n")
42 usb_actconfig_attr(bMaxPower, 2, "%3dmA\n")
44 static ssize_t show_configuration_string(struct device *dev,
45 struct device_attribute *attr, char *buf)
47 struct usb_device *udev;
48 struct usb_host_config *actconfig;
50 udev = to_usb_device(dev);
51 actconfig = udev->actconfig;
52 if ((!actconfig) || (!actconfig->string))
54 return sprintf(buf, "%s\n", actconfig->string);
56 static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL);
58 /* configuration value is always present, and r/w */
59 usb_actconfig_show(bConfigurationValue, 1, "%u\n");
62 set_bConfigurationValue(struct device *dev, struct device_attribute *attr,
63 const char *buf, size_t count)
65 struct usb_device *udev = to_usb_device(dev);
68 if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255)
70 usb_lock_device(udev);
71 value = usb_set_configuration(udev, config);
72 usb_unlock_device(udev);
73 return (value < 0) ? value : count;
76 static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR,
77 show_bConfigurationValue, set_bConfigurationValue);
80 #define usb_string_attr(name) \
81 static ssize_t show_##name(struct device *dev, \
82 struct device_attribute *attr, char *buf) \
84 struct usb_device *udev; \
87 udev = to_usb_device(dev); \
88 usb_lock_device(udev); \
89 retval = sprintf(buf, "%s\n", udev->name); \
90 usb_unlock_device(udev); \
93 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
95 usb_string_attr(product);
96 usb_string_attr(manufacturer);
97 usb_string_attr(serial);
100 show_speed(struct device *dev, struct device_attribute *attr, char *buf)
102 struct usb_device *udev;
105 udev = to_usb_device(dev);
107 switch (udev->speed) {
111 case USB_SPEED_UNKNOWN:
118 case USB_SPEED_WIRELESS:
121 case USB_SPEED_SUPER:
127 return sprintf(buf, "%s\n", speed);
129 static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);
132 show_busnum(struct device *dev, struct device_attribute *attr, char *buf)
134 struct usb_device *udev;
136 udev = to_usb_device(dev);
137 return sprintf(buf, "%d\n", udev->bus->busnum);
139 static DEVICE_ATTR(busnum, S_IRUGO, show_busnum, NULL);
142 show_devnum(struct device *dev, struct device_attribute *attr, char *buf)
144 struct usb_device *udev;
146 udev = to_usb_device(dev);
147 return sprintf(buf, "%d\n", udev->devnum);
149 static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);
152 show_devpath(struct device *dev, struct device_attribute *attr, char *buf)
154 struct usb_device *udev;
156 udev = to_usb_device(dev);
157 return sprintf(buf, "%s\n", udev->devpath);
159 static DEVICE_ATTR(devpath, S_IRUGO, show_devpath, NULL);
162 show_version(struct device *dev, struct device_attribute *attr, char *buf)
164 struct usb_device *udev;
167 udev = to_usb_device(dev);
168 bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
169 return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
171 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
174 show_maxchild(struct device *dev, struct device_attribute *attr, char *buf)
176 struct usb_device *udev;
178 udev = to_usb_device(dev);
179 return sprintf(buf, "%d\n", udev->maxchild);
181 static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);
184 show_quirks(struct device *dev, struct device_attribute *attr, char *buf)
186 struct usb_device *udev;
188 udev = to_usb_device(dev);
189 return sprintf(buf, "0x%x\n", udev->quirks);
191 static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL);
194 show_avoid_reset_quirk(struct device *dev, struct device_attribute *attr, char *buf)
196 struct usb_device *udev;
198 udev = to_usb_device(dev);
199 return sprintf(buf, "%d\n", !!(udev->quirks & USB_QUIRK_RESET_MORPHS));
203 set_avoid_reset_quirk(struct device *dev, struct device_attribute *attr,
204 const char *buf, size_t count)
206 struct usb_device *udev = to_usb_device(dev);
209 if (sscanf(buf, "%d", &config) != 1 || config < 0 || config > 1)
211 usb_lock_device(udev);
213 udev->quirks |= USB_QUIRK_RESET_MORPHS;
215 udev->quirks &= ~USB_QUIRK_RESET_MORPHS;
216 usb_unlock_device(udev);
220 static DEVICE_ATTR(avoid_reset_quirk, S_IRUGO | S_IWUSR,
221 show_avoid_reset_quirk, set_avoid_reset_quirk);
224 show_urbnum(struct device *dev, struct device_attribute *attr, char *buf)
226 struct usb_device *udev;
228 udev = to_usb_device(dev);
229 return sprintf(buf, "%d\n", atomic_read(&udev->urbnum));
231 static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL);
234 show_removable(struct device *dev, struct device_attribute *attr, char *buf)
236 struct usb_device *udev;
239 udev = to_usb_device(dev);
241 switch (udev->removable) {
242 case USB_DEVICE_REMOVABLE:
245 case USB_DEVICE_FIXED:
252 return sprintf(buf, "%s\n", state);
254 static DEVICE_ATTR(removable, S_IRUGO, show_removable, NULL);
259 show_persist(struct device *dev, struct device_attribute *attr, char *buf)
261 struct usb_device *udev = to_usb_device(dev);
263 return sprintf(buf, "%d\n", udev->persist_enabled);
267 set_persist(struct device *dev, struct device_attribute *attr,
268 const char *buf, size_t count)
270 struct usb_device *udev = to_usb_device(dev);
273 /* Hubs are always enabled for USB_PERSIST */
274 if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
277 if (sscanf(buf, "%d", &value) != 1)
280 usb_lock_device(udev);
281 udev->persist_enabled = !!value;
282 usb_unlock_device(udev);
286 static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist);
288 static int add_persist_attributes(struct device *dev)
292 if (is_usb_device(dev)) {
293 struct usb_device *udev = to_usb_device(dev);
295 /* Hubs are automatically enabled for USB_PERSIST,
296 * no point in creating the attribute file.
298 if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
299 rc = sysfs_add_file_to_group(&dev->kobj,
300 &dev_attr_persist.attr,
306 static void remove_persist_attributes(struct device *dev)
308 sysfs_remove_file_from_group(&dev->kobj,
309 &dev_attr_persist.attr,
314 #define add_persist_attributes(dev) 0
315 #define remove_persist_attributes(dev) do {} while (0)
317 #endif /* CONFIG_PM */
319 #ifdef CONFIG_USB_SUSPEND
322 show_connected_duration(struct device *dev, struct device_attribute *attr,
325 struct usb_device *udev = to_usb_device(dev);
327 return sprintf(buf, "%u\n",
328 jiffies_to_msecs(jiffies - udev->connect_time));
331 static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL);
334 * If the device is resumed, the last time the device was suspended has
335 * been pre-subtracted from active_duration. We add the current time to
336 * get the duration that the device was actually active.
338 * If the device is suspended, the active_duration is up-to-date.
341 show_active_duration(struct device *dev, struct device_attribute *attr,
344 struct usb_device *udev = to_usb_device(dev);
347 if (udev->state != USB_STATE_SUSPENDED)
348 duration = jiffies_to_msecs(jiffies + udev->active_duration);
350 duration = jiffies_to_msecs(udev->active_duration);
351 return sprintf(buf, "%u\n", duration);
354 static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL);
357 show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
359 return sprintf(buf, "%d\n", dev->power.autosuspend_delay / 1000);
363 set_autosuspend(struct device *dev, struct device_attribute *attr,
364 const char *buf, size_t count)
368 if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/1000 ||
369 value <= -INT_MAX/1000)
372 pm_runtime_set_autosuspend_delay(dev, value * 1000);
376 static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR,
377 show_autosuspend, set_autosuspend);
379 static const char on_string[] = "on";
380 static const char auto_string[] = "auto";
382 static void warn_level(void) {
383 static int level_warned;
387 printk(KERN_WARNING "WARNING! power/level is deprecated; "
388 "use power/control instead\n");
393 show_level(struct device *dev, struct device_attribute *attr, char *buf)
395 struct usb_device *udev = to_usb_device(dev);
396 const char *p = auto_string;
399 if (udev->state != USB_STATE_SUSPENDED && !udev->dev.power.runtime_auto)
401 return sprintf(buf, "%s\n", p);
405 set_level(struct device *dev, struct device_attribute *attr,
406 const char *buf, size_t count)
408 struct usb_device *udev = to_usb_device(dev);
414 cp = memchr(buf, '\n', count);
418 usb_lock_device(udev);
420 if (len == sizeof on_string - 1 &&
421 strncmp(buf, on_string, len) == 0)
422 usb_disable_autosuspend(udev);
424 else if (len == sizeof auto_string - 1 &&
425 strncmp(buf, auto_string, len) == 0)
426 usb_enable_autosuspend(udev);
431 usb_unlock_device(udev);
435 static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level);
438 show_usb2_hardware_lpm(struct device *dev, struct device_attribute *attr,
441 struct usb_device *udev = to_usb_device(dev);
444 if (udev->usb2_hw_lpm_enabled == 1)
449 return sprintf(buf, "%s\n", p);
453 set_usb2_hardware_lpm(struct device *dev, struct device_attribute *attr,
454 const char *buf, size_t count)
456 struct usb_device *udev = to_usb_device(dev);
460 usb_lock_device(udev);
462 ret = strtobool(buf, &value);
465 ret = usb_set_usb2_hardware_lpm(udev, value);
467 usb_unlock_device(udev);
475 static DEVICE_ATTR(usb2_hardware_lpm, S_IRUGO | S_IWUSR, show_usb2_hardware_lpm,
476 set_usb2_hardware_lpm);
478 static struct attribute *usb2_hardware_lpm_attr[] = {
479 &dev_attr_usb2_hardware_lpm.attr,
482 static struct attribute_group usb2_hardware_lpm_attr_group = {
483 .name = power_group_name,
484 .attrs = usb2_hardware_lpm_attr,
487 static struct attribute *power_attrs[] = {
488 &dev_attr_autosuspend.attr,
489 &dev_attr_level.attr,
490 &dev_attr_connected_duration.attr,
491 &dev_attr_active_duration.attr,
494 static struct attribute_group power_attr_group = {
495 .name = power_group_name,
496 .attrs = power_attrs,
499 static int add_power_attributes(struct device *dev)
503 if (is_usb_device(dev)) {
504 struct usb_device *udev = to_usb_device(dev);
505 rc = sysfs_merge_group(&dev->kobj, &power_attr_group);
506 if (udev->usb2_hw_lpm_capable == 1)
507 rc = sysfs_merge_group(&dev->kobj,
508 &usb2_hardware_lpm_attr_group);
514 static void remove_power_attributes(struct device *dev)
516 sysfs_unmerge_group(&dev->kobj, &usb2_hardware_lpm_attr_group);
517 sysfs_unmerge_group(&dev->kobj, &power_attr_group);
522 #define add_power_attributes(dev) 0
523 #define remove_power_attributes(dev) do {} while (0)
525 #endif /* CONFIG_USB_SUSPEND */
528 /* Descriptor fields */
529 #define usb_descriptor_attr_le16(field, format_string) \
531 show_##field(struct device *dev, struct device_attribute *attr, \
534 struct usb_device *udev; \
536 udev = to_usb_device(dev); \
537 return sprintf(buf, format_string, \
538 le16_to_cpu(udev->descriptor.field)); \
540 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
542 usb_descriptor_attr_le16(idVendor, "%04x\n")
543 usb_descriptor_attr_le16(idProduct, "%04x\n")
544 usb_descriptor_attr_le16(bcdDevice, "%04x\n")
546 #define usb_descriptor_attr(field, format_string) \
548 show_##field(struct device *dev, struct device_attribute *attr, \
551 struct usb_device *udev; \
553 udev = to_usb_device(dev); \
554 return sprintf(buf, format_string, udev->descriptor.field); \
556 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
558 usb_descriptor_attr(bDeviceClass, "%02x\n")
559 usb_descriptor_attr(bDeviceSubClass, "%02x\n")
560 usb_descriptor_attr(bDeviceProtocol, "%02x\n")
561 usb_descriptor_attr(bNumConfigurations, "%d\n")
562 usb_descriptor_attr(bMaxPacketSize0, "%d\n")
566 /* show if the device is authorized (1) or not (0) */
567 static ssize_t usb_dev_authorized_show(struct device *dev,
568 struct device_attribute *attr,
571 struct usb_device *usb_dev = to_usb_device(dev);
572 return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
577 * Authorize a device to be used in the system
579 * Writing a 0 deauthorizes the device, writing a 1 authorizes it.
581 static ssize_t usb_dev_authorized_store(struct device *dev,
582 struct device_attribute *attr,
583 const char *buf, size_t size)
586 struct usb_device *usb_dev = to_usb_device(dev);
588 result = sscanf(buf, "%u\n", &val);
592 result = usb_deauthorize_device(usb_dev);
594 result = usb_authorize_device(usb_dev);
595 return result < 0? result : size;
598 static DEVICE_ATTR_IGNORE_LOCKDEP(authorized, 0644,
599 usb_dev_authorized_show, usb_dev_authorized_store);
601 /* "Safely remove a device" */
602 static ssize_t usb_remove_store(struct device *dev,
603 struct device_attribute *attr,
604 const char *buf, size_t count)
606 struct usb_device *udev = to_usb_device(dev);
609 usb_lock_device(udev);
610 if (udev->state != USB_STATE_NOTATTACHED) {
612 /* To avoid races, first unconfigure and then remove */
613 usb_set_configuration(udev, -1);
614 rc = usb_remove_device(udev);
618 usb_unlock_device(udev);
621 static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0200, NULL, usb_remove_store);
624 static struct attribute *dev_attrs[] = {
625 /* current configuration's attributes */
626 &dev_attr_configuration.attr,
627 &dev_attr_bNumInterfaces.attr,
628 &dev_attr_bConfigurationValue.attr,
629 &dev_attr_bmAttributes.attr,
630 &dev_attr_bMaxPower.attr,
631 /* device attributes */
632 &dev_attr_urbnum.attr,
633 &dev_attr_idVendor.attr,
634 &dev_attr_idProduct.attr,
635 &dev_attr_bcdDevice.attr,
636 &dev_attr_bDeviceClass.attr,
637 &dev_attr_bDeviceSubClass.attr,
638 &dev_attr_bDeviceProtocol.attr,
639 &dev_attr_bNumConfigurations.attr,
640 &dev_attr_bMaxPacketSize0.attr,
641 &dev_attr_speed.attr,
642 &dev_attr_busnum.attr,
643 &dev_attr_devnum.attr,
644 &dev_attr_devpath.attr,
645 &dev_attr_version.attr,
646 &dev_attr_maxchild.attr,
647 &dev_attr_quirks.attr,
648 &dev_attr_avoid_reset_quirk.attr,
649 &dev_attr_authorized.attr,
650 &dev_attr_remove.attr,
651 &dev_attr_removable.attr,
654 static struct attribute_group dev_attr_grp = {
658 /* When modifying this list, be sure to modify dev_string_attrs_are_visible()
661 static struct attribute *dev_string_attrs[] = {
662 &dev_attr_manufacturer.attr,
663 &dev_attr_product.attr,
664 &dev_attr_serial.attr,
668 static umode_t dev_string_attrs_are_visible(struct kobject *kobj,
669 struct attribute *a, int n)
671 struct device *dev = container_of(kobj, struct device, kobj);
672 struct usb_device *udev = to_usb_device(dev);
674 if (a == &dev_attr_manufacturer.attr) {
675 if (udev->manufacturer == NULL)
677 } else if (a == &dev_attr_product.attr) {
678 if (udev->product == NULL)
680 } else if (a == &dev_attr_serial.attr) {
681 if (udev->serial == NULL)
687 static struct attribute_group dev_string_attr_grp = {
688 .attrs = dev_string_attrs,
689 .is_visible = dev_string_attrs_are_visible,
692 const struct attribute_group *usb_device_groups[] = {
694 &dev_string_attr_grp,
698 /* Binary descriptors */
701 read_descriptors(struct file *filp, struct kobject *kobj,
702 struct bin_attribute *attr,
703 char *buf, loff_t off, size_t count)
705 struct device *dev = container_of(kobj, struct device, kobj);
706 struct usb_device *udev = to_usb_device(dev);
707 size_t nleft = count;
712 /* The binary attribute begins with the device descriptor.
713 * Following that are the raw descriptor entries for all the
714 * configurations (config plus subsidiary descriptors).
716 for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations &&
717 nleft > 0; ++cfgno) {
719 src = &udev->descriptor;
720 srclen = sizeof(struct usb_device_descriptor);
722 src = udev->rawdescriptors[cfgno];
723 srclen = __le16_to_cpu(udev->config[cfgno].desc.
727 n = min(nleft, srclen - (size_t) off);
728 memcpy(buf, src + off, n);
736 return count - nleft;
739 static struct bin_attribute dev_bin_attr_descriptors = {
740 .attr = {.name = "descriptors", .mode = 0444},
741 .read = read_descriptors,
742 .size = 18 + 65535, /* dev descr + max-size raw descriptor */
745 int usb_create_sysfs_dev_files(struct usb_device *udev)
747 struct device *dev = &udev->dev;
750 retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
754 retval = add_persist_attributes(dev);
758 retval = add_power_attributes(dev);
763 usb_remove_sysfs_dev_files(udev);
767 void usb_remove_sysfs_dev_files(struct usb_device *udev)
769 struct device *dev = &udev->dev;
771 remove_power_attributes(dev);
772 remove_persist_attributes(dev);
773 device_remove_bin_file(dev, &dev_bin_attr_descriptors);
776 /* Interface Accociation Descriptor fields */
777 #define usb_intf_assoc_attr(field, format_string) \
779 show_iad_##field(struct device *dev, struct device_attribute *attr, \
782 struct usb_interface *intf = to_usb_interface(dev); \
784 return sprintf(buf, format_string, \
785 intf->intf_assoc->field); \
787 static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL);
789 usb_intf_assoc_attr(bFirstInterface, "%02x\n")
790 usb_intf_assoc_attr(bInterfaceCount, "%02d\n")
791 usb_intf_assoc_attr(bFunctionClass, "%02x\n")
792 usb_intf_assoc_attr(bFunctionSubClass, "%02x\n")
793 usb_intf_assoc_attr(bFunctionProtocol, "%02x\n")
795 /* Interface fields */
796 #define usb_intf_attr(field, format_string) \
798 show_##field(struct device *dev, struct device_attribute *attr, \
801 struct usb_interface *intf = to_usb_interface(dev); \
803 return sprintf(buf, format_string, \
804 intf->cur_altsetting->desc.field); \
806 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
808 usb_intf_attr(bInterfaceNumber, "%02x\n")
809 usb_intf_attr(bAlternateSetting, "%2d\n")
810 usb_intf_attr(bNumEndpoints, "%02x\n")
811 usb_intf_attr(bInterfaceClass, "%02x\n")
812 usb_intf_attr(bInterfaceSubClass, "%02x\n")
813 usb_intf_attr(bInterfaceProtocol, "%02x\n")
815 static ssize_t show_interface_string(struct device *dev,
816 struct device_attribute *attr, char *buf)
818 struct usb_interface *intf;
821 intf = to_usb_interface(dev);
822 string = intf->cur_altsetting->string;
823 barrier(); /* The altsetting might change! */
827 return sprintf(buf, "%s\n", string);
829 static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
831 static ssize_t show_modalias(struct device *dev,
832 struct device_attribute *attr, char *buf)
834 struct usb_interface *intf;
835 struct usb_device *udev;
836 struct usb_host_interface *alt;
838 intf = to_usb_interface(dev);
839 udev = interface_to_usbdev(intf);
840 alt = intf->cur_altsetting;
842 return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
843 "ic%02Xisc%02Xip%02X\n",
844 le16_to_cpu(udev->descriptor.idVendor),
845 le16_to_cpu(udev->descriptor.idProduct),
846 le16_to_cpu(udev->descriptor.bcdDevice),
847 udev->descriptor.bDeviceClass,
848 udev->descriptor.bDeviceSubClass,
849 udev->descriptor.bDeviceProtocol,
850 alt->desc.bInterfaceClass,
851 alt->desc.bInterfaceSubClass,
852 alt->desc.bInterfaceProtocol);
854 static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
856 static ssize_t show_supports_autosuspend(struct device *dev,
857 struct device_attribute *attr, char *buf)
859 struct usb_interface *intf;
860 struct usb_device *udev;
863 intf = to_usb_interface(dev);
864 udev = interface_to_usbdev(intf);
866 usb_lock_device(udev);
867 /* Devices will be autosuspended even when an interface isn't claimed */
868 if (!intf->dev.driver ||
869 to_usb_driver(intf->dev.driver)->supports_autosuspend)
870 ret = sprintf(buf, "%u\n", 1);
872 ret = sprintf(buf, "%u\n", 0);
873 usb_unlock_device(udev);
877 static DEVICE_ATTR(supports_autosuspend, S_IRUGO, show_supports_autosuspend, NULL);
879 static struct attribute *intf_attrs[] = {
880 &dev_attr_bInterfaceNumber.attr,
881 &dev_attr_bAlternateSetting.attr,
882 &dev_attr_bNumEndpoints.attr,
883 &dev_attr_bInterfaceClass.attr,
884 &dev_attr_bInterfaceSubClass.attr,
885 &dev_attr_bInterfaceProtocol.attr,
886 &dev_attr_modalias.attr,
887 &dev_attr_supports_autosuspend.attr,
890 static struct attribute_group intf_attr_grp = {
894 static struct attribute *intf_assoc_attrs[] = {
895 &dev_attr_iad_bFirstInterface.attr,
896 &dev_attr_iad_bInterfaceCount.attr,
897 &dev_attr_iad_bFunctionClass.attr,
898 &dev_attr_iad_bFunctionSubClass.attr,
899 &dev_attr_iad_bFunctionProtocol.attr,
903 static umode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
904 struct attribute *a, int n)
906 struct device *dev = container_of(kobj, struct device, kobj);
907 struct usb_interface *intf = to_usb_interface(dev);
909 if (intf->intf_assoc == NULL)
914 static struct attribute_group intf_assoc_attr_grp = {
915 .attrs = intf_assoc_attrs,
916 .is_visible = intf_assoc_attrs_are_visible,
919 const struct attribute_group *usb_interface_groups[] = {
921 &intf_assoc_attr_grp,
925 void usb_create_sysfs_intf_files(struct usb_interface *intf)
927 struct usb_device *udev = interface_to_usbdev(intf);
928 struct usb_host_interface *alt = intf->cur_altsetting;
930 if (intf->sysfs_files_created || intf->unregistering)
933 if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
934 alt->string = usb_cache_string(udev, alt->desc.iInterface);
935 if (alt->string && device_create_file(&intf->dev, &dev_attr_interface))
936 ; /* We don't actually care if the function fails. */
937 intf->sysfs_files_created = 1;
940 void usb_remove_sysfs_intf_files(struct usb_interface *intf)
942 if (!intf->sysfs_files_created)
945 device_remove_file(&intf->dev, &dev_attr_interface);
946 intf->sysfs_files_created = 0;