0001 What: /config/usb-gadget
0002 Date: Jun 2013
0003 KernelVersion: 3.11
0004 Description:
0005 This group contains sub-groups corresponding to created
0006 USB gadgets.
0007
0008 What: /config/usb-gadget/gadget
0009 Date: Jun 2013
0010 KernelVersion: 3.11
0011 Description:
0012
0013 The attributes of a gadget:
0014
0015 ================ ============================================
0016 UDC bind a gadget to UDC/unbind a gadget;
0017 write UDC's name found in /sys/class/udc/*
0018 to bind a gadget, empty string "" to unbind.
0019
0020 max_speed maximum speed the driver supports. Valid
0021 names are super-speed-plus, super-speed,
0022 high-speed, full-speed, and low-speed.
0023
0024 bDeviceClass USB device class code
0025 bDeviceSubClass USB device subclass code
0026 bDeviceProtocol USB device protocol code
0027 bMaxPacketSize0 maximum endpoint 0 packet size
0028 bcdDevice bcd device release number
0029 bcdUSB bcd USB specification version number
0030 idProduct product ID
0031 idVendor vendor ID
0032 ================ ============================================
0033
0034 What: /config/usb-gadget/gadget/configs
0035 Date: Jun 2013
0036 KernelVersion: 3.11
0037 Description:
0038 This group contains a USB gadget's configurations
0039
0040 What: /config/usb-gadget/gadget/configs/config
0041 Date: Jun 2013
0042 KernelVersion: 3.11
0043 Description:
0044 The attributes of a configuration:
0045
0046 ================ ======================================
0047 bmAttributes configuration characteristics
0048 MaxPower maximum power consumption from the bus
0049 ================ ======================================
0050
0051 What: /config/usb-gadget/gadget/configs/config/strings
0052 Date: Jun 2013
0053 KernelVersion: 3.11
0054 Description:
0055 This group contains subdirectories for language-specific
0056 strings for this configuration.
0057
0058 What: /config/usb-gadget/gadget/configs/config/strings/language
0059 Date: Jun 2013
0060 KernelVersion: 3.11
0061 Description:
0062 The attributes:
0063
0064 ================ =========================
0065 configuration configuration description
0066 ================ =========================
0067
0068
0069 What: /config/usb-gadget/gadget/functions
0070 Date: Jun 2013
0071 KernelVersion: 3.11
0072 Description:
0073 This group contains functions available to this USB gadget.
0074
0075 What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>
0076 Date: May 2014
0077 KernelVersion: 3.16
0078 Description:
0079 This group contains "Feature Descriptors" specific for one
0080 gadget's USB interface or one interface group described
0081 by an IAD.
0082
0083 The attributes:
0084
0085 ================= =====================================
0086 compatible_id 8-byte string for "Compatible ID"
0087 sub_compatible_id 8-byte string for "Sub Compatible ID"
0088 ================= =====================================
0089
0090 What: /config/usb-gadget/gadget/functions/<func>.<inst>/interface.<n>/<property>
0091 Date: May 2014
0092 KernelVersion: 3.16
0093 Description:
0094 This group contains "Extended Property Descriptors" specific for one
0095 gadget's USB interface or one interface group described
0096 by an IAD.
0097
0098 The attributes:
0099
0100 ===== ===============================================
0101 type value 1..7 for interpreting the data
0102
0103 - 1: unicode string
0104 - 2: unicode string with environment variable
0105 - 3: binary
0106 - 4: little-endian 32-bit
0107 - 5: big-endian 32-bit
0108 - 6: unicode string with a symbolic link
0109 - 7: multiple unicode strings
0110 data blob of data to be interpreted depending on
0111 type
0112 ===== ===============================================
0113
0114 What: /config/usb-gadget/gadget/strings
0115 Date: Jun 2013
0116 KernelVersion: 3.11
0117 Description:
0118 This group contains subdirectories for language-specific
0119 strings for this gadget.
0120
0121 What: /config/usb-gadget/gadget/strings/language
0122 Date: Jun 2013
0123 KernelVersion: 3.11
0124 Description:
0125 The attributes:
0126
0127 ============ =================================
0128 serialnumber gadget's serial number (string)
0129 product gadget's product description
0130 manufacturer gadget's manufacturer description
0131 ============ =================================
0132
0133 What: /config/usb-gadget/gadget/os_desc
0134 Date: May 2014
0135 KernelVersion: 3.16
0136 Description:
0137 This group contains "OS String" extension handling attributes.
0138
0139 ============= ===============================================
0140 use flag turning "OS Descriptors" support on/off
0141 b_vendor_code one-byte value used for custom per-device and
0142 per-interface requests
0143 qw_sign an identifier to be reported as "OS String"
0144 proper
0145 ============= ===============================================
