What: /config/usb-gadget
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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This group contains sub-groups corresponding to created
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USB gadgets.
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What: /config/usb-gadget/gadget
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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The attributes of a gadget:
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================ ============================================
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UDC bind a gadget to UDC/unbind a gadget;
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write UDC's name found in /sys/class/udc/*
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to bind a gadget, empty string "" to unbind.
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max_speed maximum speed the driver supports. Valid
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names are super-speed-plus, super-speed,
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high-speed, full-speed, and low-speed.
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bDeviceClass USB device class code
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bDeviceSubClass USB device subclass code
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bDeviceProtocol USB device protocol code
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bMaxPacketSize0 maximum endpoint 0 packet size
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bcdDevice bcd device release number
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bcdUSB bcd USB specification version number
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idProduct product ID
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idVendor vendor ID
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================ ============================================
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What: /config/usb-gadget/gadget/configs
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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This group contains a USB gadget's configurations
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What: /config/usb-gadget/gadget/configs/config
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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The attributes of a configuration:
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================ ======================================
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bmAttributes configuration characteristics
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MaxPower maximum power consumption from the bus
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================ ======================================
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What: /config/usb-gadget/gadget/configs/config/strings
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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This group contains subdirectories for language-specific
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strings for this configuration.
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What: /config/usb-gadget/gadget/configs/config/strings/language
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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The attributes:
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================ =========================
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configuration configuration description
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================ =========================
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What: /config/usb-gadget/gadget/functions
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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This group contains functions available to this USB gadget.
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What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>
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Date: May 2014
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KernelVersion: 3.16
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Description:
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This group contains "Feature Descriptors" specific for one
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gadget's USB interface or one interface group described
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by an IAD.
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The attributes:
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================= =====================================
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compatible_id 8-byte string for "Compatible ID"
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sub_compatible_id 8-byte string for "Sub Compatible ID"
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================= =====================================
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What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property>
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Date: May 2014
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KernelVersion: 3.16
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Description:
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This group contains "Extended Property Descriptors" specific for one
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gadget's USB interface or one interface group described
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by an IAD.
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The attributes:
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===== ===============================================
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type value 1..7 for interpreting the data
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- 1: unicode string
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- 2: unicode string with environment variable
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- 3: binary
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- 4: little-endian 32-bit
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- 5: big-endian 32-bit
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- 6: unicode string with a symbolic link
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- 7: multiple unicode strings
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data blob of data to be interpreted depending on
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type
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===== ===============================================
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What: /config/usb-gadget/gadget/strings
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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This group contains subdirectories for language-specific
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strings for this gadget.
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What: /config/usb-gadget/gadget/strings/language
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Date: Jun 2013
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KernelVersion: 3.11
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Description:
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The attributes:
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============ =================================
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serialnumber gadget's serial number (string)
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product gadget's product description
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manufacturer gadget's manufacturer description
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============ =================================
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What: /config/usb-gadget/gadget/os_desc
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Date: May 2014
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KernelVersion: 3.16
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Description:
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This group contains "OS String" extension handling attributes.
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============= ===============================================
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use flag turning "OS Desctiptors" support on/off
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b_vendor_code one-byte value used for custom per-device and
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per-interface requests
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qw_sign an identifier to be reported as "OS String"
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proper
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============= ===============================================
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