Copyright (c) 2004, Sun Microsystems, Inc., All Rights Reserved
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#include <sys/usb/usba.h>
Solaris DDI specific (Solaris DDI)
The usb_cfg_descr_t configuration descriptor defines attributes 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 subcomponents (for example, interfaces and endpoints) of a configuration. 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 usb_get_dev_data(9F).
A configuration descriptor has the following fields:
uint8_t bLength Size of this descriptor in bytes. uint8_t bDescriptorType Set to USB_DESCR_TYPE_CFG. uint16_t wTotalLength Total length of data returned including this and all other descriptors in this configuration. uint8_t bNumInterfaces Number of interfaces in this configuration. uint8_t bConfigurationValue ID of this configuration (1-based). uint8_t iConfiguration Index of optional configuration string. Valid if > 0. uint8_t bmAttributes Configuration characteristics (See below). uint8_t bMaxPower Maximum power consumption, in 2mA units. Configuration descriptors define the following bmAttributes: USB_CFG_ATTR_SELFPWR - Set if config not using bus power. USB_CFG_ATTR_REMOTE_WAKEUP - Set if config supports rem wakeup.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Architecture | PCI-based systems |
| Interface stability | Committed |
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_dev_descr(9S), usb_dev_qlf_descr(9S), usb_ep_descr(9S), usb_if_descr(9S), usb_other_speed_cfg_descr(9S), usb_string_descr(9S)