1 files changed, 64 insertions, 0 deletions
diff --git a/FatPkg/EnhancedFatDxe/Fat.c b/FatPkg/EnhancedFatDxe/Fat.c
index 2e6c089650..e29c64cb03 100644
--- a/FatPkg/EnhancedFatDxe/Fat.c
+++ b/FatPkg/EnhancedFatDxe/Fat.c
@@ -14,6 +14,17 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include "Fat.h"
 
+/**
+
+  Register Driver Binding protocol for this driver.
+
+  @param  ImageHandle           - Handle for the image of this driver.
+  @param  SystemTable           - Pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS           - Driver loaded.
+  @return other                 - Driver not loaded.
+
+**/
 EFI_STATUS
 EFIAPI
 FatEntryPoint (
@@ -21,12 +32,36 @@ FatEntryPoint (
   IN EFI_SYSTEM_TABLE   *SystemTable
   );
 
+/**
+
+  Unload function for this image. Uninstall DriverBinding protocol.
+
+  @param ImageHandle           - Handle for the image of this driver.
+
+  @retval EFI_SUCCESS           - Driver unloaded successfully.
+  @return other                 - Driver can not unloaded.
+
+**/
 EFI_STATUS
 EFIAPI
 FatUnload (
   IN EFI_HANDLE         ImageHandle
   );
 
+/**
+
+  Test to see if this driver can add a file system to ControllerHandle.
+  ControllerHandle must support both Disk IO and Block IO protocols.
+
+  @param  This                  - Protocol instance pointer.
+  @param  ControllerHandle      - Handle of device to test.
+  @param  RemainingDevicePath   - Not used.
+
+  @retval EFI_SUCCESS           - This driver supports this device.
+  @retval EFI_ALREADY_STARTED   - This driver is already running on this device.
+  @return other                 - This driver does not support this device.
+
+**/
 EFI_STATUS
 EFIAPI
 FatDriverBindingSupported (
@@ -35,6 +70,22 @@ FatDriverBindingSupported (
   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
   );
 
+/**
+
+  Start this driver on ControllerHandle by opening a Block IO and Disk IO
+  protocol, reading Device Path. Add a Simple File System protocol to
+  ControllerHandle if the media contains a valid file system.
+
+  @param  This                  - Protocol instance pointer.
+  @param  ControllerHandle      - Handle of device to bind driver to.
+  @param  RemainingDevicePath   - Not used.
+
+  @retval EFI_SUCCESS           - This driver is added to DeviceHandle.
+  @retval EFI_ALREADY_STARTED   - This driver is already running on DeviceHandle.
+  @retval EFI_OUT_OF_RESOURCES  - Can not allocate the memory.
+  @return other                 - This driver does not support this device.
+
+**/
 EFI_STATUS
 EFIAPI
 FatDriverBindingStart (
@@ -43,6 +94,19 @@ FatDriverBindingStart (
   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
   );
 
+/**
+
+  Stop this driver on ControllerHandle.
+
+  @param  This                  - Protocol instance pointer.
+  @param  ControllerHandle      - Handle of device to stop driver on.
+  @param  NumberOfChildren      - Not used.
+  @param  ChildHandleBuffer     - Not used.
+
+  @retval EFI_SUCCESS           - This driver is removed DeviceHandle.
+  @return other                 - This driver was not removed from this device.
+
+**/
 EFI_STATUS
 EFIAPI
 FatDriverBindingStop (