Hi all,
In \FmpDevicePkg\Library\FmpDeviceLibNull\FmpDeviceLib.c
There are comments for RegisterFmpInstaller:
/**
Used to pass the FMP install function to this lib. This allows the library to
have control of the handle that the FMP instance is installed on. This allows
the library to use DriverBinding protocol model to locate its device(s) in the
system.
@param[in] Func Function pointer to FMP install function.
@retval EFI_SUCCESS Library has saved function pointer and will call
function pointer on each DriverBinding Start.
@retval EFI_UNSUPPORTED Library doesn't use driver binding and only supports
a single instance.
@retval other error Error occurred. Don't install FMP
**/
EFI_STATUS
EFIAPI
RegisterFmpInstaller (
IN FMP_DEVICE_LIB_REGISTER_FMP_INSTALLER Func
)
{
//
// This is a system firmware update that does not use Driver Binding Protocol
//
return EFI_UNSUPPORTED;
}
However, since the ‘RegisterFmpInstaller’ of the example directly returns
EFI_UNSUPPORTED , it does not demonstrate how to handle the DriverBinding
protocol.
In addition, I refer to
the example of \MdeModulePkg\Bus\Usb\UsbMouseAbsolutePointerDxe adding the
driverbinding protocol to locate the USBMouse device to the
'RegisterFmpInstaller' function. And set the return value of
RegisterFmpInstaller to EFI_SUCCESS.
where RegisterFmpInstaller is in the following file:
edk2-platforms\Platform\Intel\Vlv2TbltDevicePkg\Feature\Capsule\Library\FmpDeviceLibSample
Then tested on Minnowboard.
Test command: CapsuleApp.efi Red.cap
The test results are as follows:
* During the Capsule update process, when FmpDeviceSetImageWithStatus is
executed, USBMouseAbsolutePointerDriverBindingSupported has not been executed,
that is, USB Device IO cannot be operated yet.
* After USBMouseAbsolutePointerDriverBindingSupporte d is executed, USBIO can
be operated, but at this time FmpDeviceSetImageWithStatus has been executed,
that is, capsule update is too late to process.
My questions are as follows:
* Is there an example of how RegisterFmpInstaller handles the driverbinding
protocol?
* When processing the Capsule update (FmpDeviceSetImageWithStatus), the
USBMouseAbsolutePointerDriverBindingSupported has not been executed. What
should I do?
* The parameter in RegisterFmpInstaller is the function pointer '
FMP_DEVICE_LIB_REGISTER_FMP_INSTALLER Func ', and how should the parameter
Handle in Func (ie InstallFmpInstance , see below) be passed from FmpDxe to
FmpDeviceLib ?
Any suggestion is highly appreciated!
Thanks!
EFI_STATUS
EFIAPI
FmpDxeEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
….
Status = RegisterFmpInstaller(InstallFmpInstance);
…
}
EFI_STATUS
EFIAPI
InstallFmpInstance (
IN EFI_HANDLE Handle
)
{….
}
EFI_STATUS
EFIAPI
RegisterFmpInstaller(
IN FMP_DEVICE_LIB_REGISTER_FMP_INSTALLER Func
)
{
// Because this is a sample lib with very simple fake device we don't use
// the driverbinding protocol to locate our device.
//
return EFI_UNSUPPORTED;
}
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