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	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |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 5.11							    5 Jan 2004						     usb_dev_qlf_descr(9S)