The following diagram shows how one device can have two separate device nodes:
The existing function driver can implement the firmware update mechanism, as shown in the following diagram:Īlternatively, if you want to update the function driver and the firmware update driver separately, create a second device node, on which you will install the firmware update driver. Adding firmware update logic to a vendor-supplied driver Submit your firmware update package as a separate driver submission. Typically, the firmware update driver package contains the following:
If your device uses a Microsoft-supplied driver, you must provide a separate firmware update driver package.
If your device uses a vendor-supplied driver, you have the option of adding the firmware update logic and payload to your existing function driver, or providing a separate firmware update driver package. To do this, you'll provide an update mechanism, implemented as a device driver, that includes the firmware payload. For information about updating system firmware, see Windows UEFI firmware update platform.
This topic describes how to update a removable or in-chassis device's firmware using the Windows Update (WU) service.