Data Structures for Drivers                     usbcfgdescr(9S)



NAME
     usbcfgdescr - USB configuration descriptor

SYNOPSIS
     #include 


INTERFACE LEVEL
     Solaris DI specific (Solaris DI)

DESCRIPTION
     The usbcfgdescrt configuration descriptor defines  attri-
     butes  of  a  configuration. A configuration contains one or
     more interfaces. A configuration descriptor acts as a header
     for  the  group  of other descriptors describing the subcom-
     ponents (for example, interfaces and endpoints) of a  confi-
     guration.  Please  refer  to  Section  9.6.3  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 usbgetdevdata(9F).


     A configuration descriptor has the following fields:

       uint8t         bLength                 Size of this descriptor
                                               in bytes.

       uint8t         bDescriptorType         Set to USBDESCRTYPECFG.

       uint16t        wTotalLength            Total length of data returned
                                               including this and all other
                                               descriptors in this configuration.

       uint8t         bNumInterfaces          Number of interfaces in this
                                               configuration.

       uint8t         bConfigurationValue     ID of this configuration
                                               (1-based).

       uint8t         iConfiguration          Index of optional configuration
                                               string. Valid if > 0.

       uint8t         bmAttributes            Configuration characteristics
                                               (See below).

       uint8t         bMaxPower               Maximum power consumption, in
                                               2mA units.




SunOS 5.11           Last change: 5 Jan 2004                    1






Data Structures for Drivers                     usbcfgdescr(9S)



       Configuration descriptors define the following bmAttributes:
            USBCFGATRSELFPWR       -      Set if config not using bus power.
            USBCFGATREMOTEWAKEUP -      Set if config supports rem wakeup.


ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Architecture                 PCI-based systems           
    
     Interface stability          Committed                   
    
     Availability                 SUNWusbu                    
    


SEE ALSO
     attributes(5),     usbgetaltif(9F),      usbgetcfg(9F),
     usbgetdevdata(9F),              usbgetstringdescr(9F),
     usbparsedata(9F), usbctrlrequest(9S), usbdevdescr(9S),
     usbdevqlfdescr(9S),  usbepdescr(9S),  usbifdescr(9S),
     usbotherspeedcfgdescr(9S), usbstringdescr(9S)



























SunOS 5.11           Last change: 5 Jan 2004                    2