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

usb_other_speed_cfg_descr - USB other speed configuration descriptor

#include <sys/usb/usba.h>

illumos DDI specific (illumos DDI)

The usb_other_speed_cfg_descr_t configuration descriptor defines how fields of a high speed device's configuration descriptor change if that device is run at its other speed. Fields of this descriptor reflect configuration descriptor field changes if a device's speed is changed from full to high speed, or from high to full speed.

Please refer to Section 9.6.4 of the USB 2.0 specification. The USB 2.0 specification is available at www.usb.org.

This descriptor has the following fields:


uint8_t     bLength                Size of this descriptor,
                                   in bytes.
uint8_t     bDescriptorType        Set to USB_DESCR_TYPE_OTHER_SPEED_CFG.
uint16_t    wTotalLength           Total length of data returned */
                                   including all descriptors in
                                   the current other-speed
                                   configuration.
uint8_t     bNumInterfaces         Number of interfaces in
                                   the selected configuration.
uint8_t     bConfigurationValue    ID of the current other-speed
                                   configuration (1-based).
uint8_t     iConfiguration         Configuration value.
                                   Valid if > 0. Pass to
                                   usb_get_string_descr(9F)
                                   to retrieve string.
uint8_t     bmAttributes           Configuration characteristics
                                   [See usb_cfg_descr(9S).]
uint8_t     bMaxPower              Maximum power consumption
                                   in 2mA units.

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE
Architecture PCI-based systems
Interface stability Committed

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_dev_qlf_descr(9S)
January 5, 2004 OmniOS