NAME

usb_dev_qlf_descr - USB device qualifier descriptor

SYNOPSIS

#include <sys/usb/usba.h>

INTERFACE LEVEL

illumos DDI specific (illumos 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(7) for descriptions of the following attributes:

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_ep_descr(9S), usb_if_descr(9S), usb_other_speed_cfg_descr(9S), usb_string_descr(9S)