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usb_get_string_descr(9f) [sunos man page]

usb_get_string_descr(9F)				   Kernel Functions for Drivers 				  usb_get_string_descr(9F)

usb_get_string_descr - Get string descriptor from device SYNOPSIS
#include <sys/usb/usba.h> int usb_get_string_descr(dev_info_t *dip, uint16_t langid, uint8_t index, char *buf, size_t buflen); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) PARAMETERS
dip Pointer to the device's dev_info structure. langid Language ID. Currently only USB_LANG_ID (English ascii) is valid. index String index indicating descriptor to retrieve. buf Address into which the string descriptor is placed. buflen Size of buf in bytes. DESCRIPTION
The usb_get_string_descr() function retrieves a parsed string descriptor from a device. dip specifies the device, while index indicates which descriptor to return. String descriptors provide information about other descriptors, or information that is encoded in other descriptors, in readable form. Many descriptor types have one or more index fields which identify string descriptors. (See Sections 9.5 and 9.6 of the USB 2.0 specifica- tion.) For example, a configuration descriptor's seventh byte contains the string descriptor index describing a specific configuration. Retrieved descriptors that do not fit into buflen bytes are truncated. All returned descriptors are null-terminated. RETURN VALUES
USB_SUCCESS String descriptor is returned in buf. USB_INVALID_ARGS dip or buf are NULL, or index or buflen is 0. USB_FAILURE Descriptor cannot be retrieved. CONTEXT
May be called from user or kernel context. EXAMPLES
/* Get the first string descriptor. */ char buf[SIZE]; if (usb_get_string_descr( dip, USB_LANG_ID, 0, buf, SIZE) == USB_SUCCESS) { cmn_err (CE_NOTE, "%s%d: %s", ddi_driver_name(dip), ddi_get_instance(dip), buf); } ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |PCI-based systems | +-----------------------------+-----------------------------+ |Interface stability |Evolving | +-----------------------------+-----------------------------+ |Availability |SUNWusb | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), usb_get_dev_data(9F), usb_string_descr(9S) SunOS 5.10 5 Jan 2004 usb_get_string_descr(9F)

Check Out this Related Man Page

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 SYNOPSIS
#include <sys/usb/usba.h> INTERFACE LEVEL
Solaris DDI specific (Solaris 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 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(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_cfg_descr(9S), usb_ctrl_request(9S), usb_dev_descr(9S), usb_dev_qlf_descr(9S) SunOS 5.11 5 Jan 2004 usb_other_speed_cfg_descr(9S)
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