Typically, the firmware update driver is a lightweight device driver that implements the following procedures:Īt device start or in the driver's EVT_WDF_DRIVER_DEVICE_ADD callback function: The driver binary can use KMDF, UMDF 2 or the Windows Driver Model.īecause WU can't execute software, the firmware update driver must hand the firmware to Plug and Play (PnP) for installation. In both cases, the firmware update driver package must be universal.įor more info about universal drivers, see Getting started with Windows drivers. 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 article describes how to update a removable or in-chassis device's firmware using the Windows Update (WU) service.
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