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

type

target

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.

COPYRIGHT¶