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@@ -263,3 +263,41 @@ Description:
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Supported values are 0 - 15.
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More information on how besl values map to microseconds can be found in
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USB 2.0 ECN Errata for Link Power Management, section 4.10)
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+
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+What: /sys/bus/usb/devices/.../devnum
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+KernelVersion: since at least 2.6.18
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+Description:
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+ Device address on the USB bus.
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+
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+What: /sys/bus/usb/devices/.../bConfigurationValue
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+KernelVersion: since at least 2.6.18
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+Description:
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+ bConfigurationValue of the *active* configuration for the
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+ device. Writing 0 or -1 to bConfigurationValue will reset the
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+ active configuration (unconfigure the device). Writing
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+ another value will change the active configuration.
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+
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+ Note that some devices, in violation of the USB spec, have a
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+ configuration with a value equal to 0. Writing 0 to
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+ bConfigurationValue for these devices will install that
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+ configuration, rather then unconfigure the device.
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+
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+ Writing -1 will always unconfigure the device.
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+
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+What: /sys/bus/usb/devices/.../busnum
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+KernelVersion: 2.6.22
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+Description:
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+ Bus-number of the USB-bus the device is connected to.
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+
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+What: /sys/bus/usb/devices/.../descriptors
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+KernelVersion: 2.6.26
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+Description:
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+ Binary file containing cached descriptors of the device. The
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+ binary data consists of the device descriptor followed by the
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+ descriptors for each configuration of the device.
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+ Note that the wTotalLength of the config descriptors can not
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+ be trusted, as the device may have a smaller config descriptor
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+ than it advertises. The bLength field of each (sub) descriptor
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+ can be trusted, and can be used to seek forward one (sub)
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+ descriptor at a time until the next config descriptor is found.
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+ All descriptors read from this file are in bus-endian format
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Hans de Goede