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usb_if_descr(9s)

Kernel & Driver Data Structures                               usb_if_descr(9S)



NAME
       usb_if_descr - USB interface descriptor

SYNOPSIS
       #include <sys/usb/usba.h>

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI)

DESCRIPTION
       The usb_if_descr_t interface descriptor defines attributes of an inter‐
       face. A configuration contains one or  more  interfaces.  An  interface
       contains one or more endpoints.


       Please refer to Section 9.6.5 of the USB 2.0 specification. The USB 2.0
       specification is available at https://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 attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE  _  ArchitecturePCI-based systems _ Interface Stability‐
       Committed _ Availabilitysystem/io/usb


SEE ALSO
       attributes(7),           usb_get_alt_if(9F),           usb_get_cfg(9F),
       usb_get_dev_data(9F),   usb_get_string_descr(9F),   usb_parse_data(9F),
       usb_cfg_descr(9S),       usb_ctrl_request(9S),       usb_dev_descr(9S),
       usb_dev_qlf_descr(9S), usb_ep_descr(9S), usb_other_speed_cfg_descr(9S),
       usb_string_descr(9S)



Oracle Solaris 11.4               5 Jan 2004                  usb_if_descr(9S)
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