USB_GET_STATUS

Section: (9)
Updated: 13 April 2004
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NAME

usb_get_status - issues a GET_STATUS call

SYNOPSIS

int usb_get_status (struct usb_device * dev, int type, int target, void * data);

ARGUMENTS

dev: the device whose status is being checked
type: USB_RECIP_*; for device, interface, or endpoint
target: zero (for device), else interface or endpoint number
data: pointer to two bytes of bitmap data

CONTEXT

!in_interrupt ()

DESCRIPTION

Returns device, interface, or endpoint status. Normally only of interest to see if the device is self powered, or has enabled the remote wakeup facility; or whether a bulk or interrupt endpoint is halted (``stalled'').

Bits in these status bitmaps are set using the SET_FEATURE request, and cleared using the CLEAR_FEATURE request. The usb_clear_halt function should be used to clear halt (``stall'') status.

This call is synchronous, and may not be used in an interrupt context.

Returns the number of bytes received on success, or else the status code returned by the underlying usb_control_msg call.

ABOUT THIS DOCUMENT

This documentation was generated with kernel version 2.6.1.

This document was created by man2html, using the manual pages.
Time: 11:22:04 GMT, April 13, 2004