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