IOCTL_NFCRM_SET_RADIO_STATE IOCTL (nfcradiodev.h)
This IOCTL is used by the radio management application or service to set the radio power state of the proximity device. The MediaRadioOn field is used to indicate the request power state. When the proximity radio power state is disabled, the driver should disable the proximity device interfaces (GUID_DEVINTERFACE_NFP and GUID_DEVINTERFACE_SMARTCARD_READER interfaces) and disable the P2P and reader/writer modes of the device. If the proximity radio power state is enabled, the driver should enable the proximity device interfaces and enable P2P and reader/writer modes of the controller. For more information about optimizing power modes on this device, see NFC Power Management.
Input buffer length
Output buffer length
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Possible error codes are:
|STATUS_INVALID_DEVICE_STATE||This code is returned when the device is already in the proximity radio power state that is being set by the client.|
The STATUS_INVALID_PARAMETER return code is no longer required. A bug was discovered in Windows 10 build 10240, that Windows would send a non-null output parameter with this IOCTL. This bug was fixed in later versions of Windows. To simplify code, drivers can ignore the output parameters in all versions of Windows 10.
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