usb_dev_qlf_descr(9S)					    Data Structures for Drivers 				     usb_dev_qlf_descr(9S)

NAME

       usb_dev_qlf_descr - USB device qualifier descriptor

SYNOPSIS

       #include <sys/usb/usba.h>

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

DESCRIPTION

       The device qualifier descriptor usb_dev_qlf_descr_t defines how fields of a high speed device's device descriptor would look if that device
       is run at a different speed.  If a high-speed device is running currently at full/high speed, fields of this descriptor reflect how  device
       descriptor  fields  would  look if speed was changed to high/full. Please refer to section 9.6.2 of the USB 2.0 specification.  The USB 2.0
       specification is available at www.usb.org.

       A device descriptor contains the following fields:

       uint8_t	       bLength		       Size of this descriptor.

       uint8_t	       bDescriptorType	       Set to USB_DESCR_TYPE_DEV_QLF.

       uint16_t        bcdUSB		       USB specification release
					       number in binary coded decimal.

       uint8_t	       bDeviceClass	       Device class code.
					       (See usb_dev_descr(9s).)

       uint8_t	       bDeviceSubClass	       Device subclass code.(See
					       USB 2.0 specification of
					       applicable device class for
					       information.)

       uint8_t	       bDeviceProtocol	       Protocol code.(See
					       USB 2.0 specification of
					       applicable device class for
					       information.)

       uint8_t	       bMaxPacketSize0	       Maximum packet size of
					       endpoint 0.

       uint8_t	       bNumConfigurations      Number of available
					       configurations.

       uint8_t	       bReserved	       Reserved.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |PCI-based systems 	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWusbu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5),	  usb_get_alt_if(9F),	  usb_get_cfg(9F),     usb_get_dev_data(9F),	 usb_get_string_descr(9F).     usb_parse_data(9F),
       usb_ctrl_request(9S),	usb_cfg_descr(9S),    usb_dev_descr(9S),    usb_ep_descr(9S),	usb_if_descr(9S),   usb_other_speed_cfg_descr(9S),
       usb_string_descr(9S)

SunOS 5.10							    5 Jan 2004						     usb_dev_qlf_descr(9S)