NAME

SYNOPSIS

#include <sys/usb/usba.h>

INTERFACE LEVEL

DESCRIPTION

Please refer to Section 9.6.5 of the USB 2.0 specification. The USB 2.0 specification is available at www.usb.org.

One or more configuration descriptors are retrieved from a USB device during device enumeration. They can be accessed via usb_get_dev_data(9F).

A interface descriptor has the following fields:

uint8_t     bLength                 Size of this descriptor
                                    in bytes.
uint8_t     bDescriptorType         Set to USB_DESCR_TYPE_IF.
uint8_t     bInterfaceNumber        Interface number (0-based).
uint8_t     bAlternateSetting       Alternate setting number for
                                    this interface and its
                                    endpoints (0-based).
uint8_t     bNumEndpoints           Number of endpoints,
                                    excluding endpoint 0.
uint8_t     bInterfaceClass         Interface Class code
                                    (see below).
uint8_t     bInterfaceSubClass      Sub class code. (See USB 2.0
                                    specification of applicable
                                    interface class for information.)
uint8_t     bInterfaceProtocol      Protocol code.  (See USB 2.0
                                    specification of applicable
                                    interface class for information.)
uint8_t     iInterface              Index of optional string
                                    describing this interface
                                    Valid if > 0. Pass to
                                    usb_get_string_descr(9F) to
                                    retrieve string.
USB 2.0 specification interface descriptor bInterfaceClass field
values are as follows:
        USB_CLASS_APP           Application-specific interface class
        USB_CLASS_AUDIO         Audio interface class
        USB_CLASS_CCID          Chip/Smartcard interface class
        USB_CLASS_CDC_CTRL      CDC control interface class
        USB_CLASS_CDC_DATA      CDC data interface class
        USB_CLASS_SECURITY      Content security interface class
        USB_CLASS_DIAG          Diagnostic interface class
        USB_CLASS_HID           HID interface class
        USB_CLASS_HUB           HUB interface class
        USB_CLASS_MASS_STORAGE  Mass storage interface class
        USB_CLASS_PHYSICAL      Physical interface class
        USB_CLASS_PRINTER       Printer interface class
        USB_CLASS_VENDOR_SPEC   Vendor-specific interface class
        USB_CLASS_WIRELESS      Wireless interface class

ATTRIBUTES

SEE ALSO