USB_OTHER_SPEED_CFG_DESCR(9S) Data Structures for Drivers

NAME

usb_other_speed_cfg_descr - USB other speed configuration descriptor

SYNOPSIS

#include <sys/usb/usba.h>

INTERFACE LEVEL

illumos DDI specific (illumos DDI)

DESCRIPTION

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.

ATTRIBUTES

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


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

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_dev_qlf_descr(9S)

January 5, 2004 USB_OTHER_SPEED_CFG_DESCR(9S)