/** @file

  EDKII Universal Flash Storage Host Controller Protocol.

Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under 
the terms and conditions of the BSD License that accompanies this distribution.  
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.                                            

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/


#ifndef __EDKII_UFS_HC_PROTOCOL_H__
#define __EDKII_UFS_HC_PROTOCOL_H__

//
// UFS Host Controller Protocol GUID value
//
#define EDKII_UFS_HOST_CONTROLLER_PROTOCOL_GUID \
    { \
      0xebc01af5, 0x7a9, 0x489e, { 0xb7, 0xce, 0xdc, 0x8, 0x9e, 0x45, 0x9b, 0x2f } \
    }

//
// Forward reference for pure ANSI compatability
//
typedef struct _EDKII_UFS_HOST_CONTROLLER_PROTOCOL  EDKII_UFS_HOST_CONTROLLER_PROTOCOL;


/**
  Get the MMIO base address of UFS host controller.

  @param  This          The protocol instance pointer.
  @param  MmioBar       Pointer to the UFS host controller MMIO base address.

  @retval EFI_SUCCESS            The operation succeeds.
  @retval EFI_INVALID_PARAMETER  The parameters are invalid.

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_GET_MMIO_BAR)(
  IN     EDKII_UFS_HOST_CONTROLLER_PROTOCOL     *This,
     OUT UINTN                                  *MmioBar
  );

///
/// *******************************************************
/// EFI_UFS_HOST_CONTROLLER_OPERATION
/// *******************************************************
///
typedef enum {
  ///
  /// A read operation from system memory by a bus master.
  ///
  EdkiiUfsHcOperationBusMasterRead,
  ///
  /// A write operation from system memory by a bus master.
  ///
  EdkiiUfsHcOperationBusMasterWrite,
  ///
  /// Provides both read and write access to system memory by both the processor and a
  /// bus master. The buffer is coherent from both the processor's and the bus master's point of view.
  ///
  EdkiiUfsHcOperationBusMasterCommonBuffer,
  EdkiiUfsHcOperationMaximum
} EDKII_UFS_HOST_CONTROLLER_OPERATION;

/**                                                                 
  Provides the UFS controller-specific addresses needed to access system memory.
            
  @param  This                  A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
  @param  Operation             Indicates if the bus master is going to read or write to system memory.
  @param  HostAddress           The system memory address to map to the UFS controller.
  @param  NumberOfBytes         On input the number of bytes to map. On output the number of bytes
                                that were mapped.                                                 
  @param  DeviceAddress         The resulting map address for the bus master UFS controller to use to
                                access the hosts HostAddress.                                        
  @param  Mapping               A resulting value to pass to Unmap().
                                  
  @retval EFI_SUCCESS           The range was mapped for the returned NumberOfBytes.
  @retval EFI_UNSUPPORTED       The HostAddress cannot be mapped as a common buffer.                                
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.
  @retval EFI_DEVICE_ERROR      The system hardware could not map the requested address.
                                   
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_MAP)(
  IN     EDKII_UFS_HOST_CONTROLLER_PROTOCOL   *This,
  IN     EDKII_UFS_HOST_CONTROLLER_OPERATION  Operation,
  IN     VOID                                 *HostAddress,
  IN OUT UINTN                                *NumberOfBytes,
     OUT EFI_PHYSICAL_ADDRESS                 *DeviceAddress,
     OUT VOID                                 **Mapping
  );

/**                                                                 
  Completes the Map() operation and releases any corresponding resources.
            
  @param  This                  A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.                                      
  @param  Mapping               The mapping value returned from Map().
                                  
  @retval EFI_SUCCESS           The range was unmapped.
  @retval EFI_DEVICE_ERROR      The data was not committed to the target system memory.
                                   
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_UNMAP)(
  IN  EDKII_UFS_HOST_CONTROLLER_PROTOCOL     *This,
  IN  VOID                                   *Mapping
  );

/**                                                                 
  Allocates pages that are suitable for an EfiUfsHcOperationBusMasterCommonBuffer
  mapping.                                                                       
            
  @param  This                  A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
  @param  Type                  This parameter is not used and must be ignored.
  @param  MemoryType            The type of memory to allocate, EfiBootServicesData or
                                EfiRuntimeServicesData.                               
  @param  Pages                 The number of pages to allocate.                                
  @param  HostAddress           A pointer to store the base system memory address of the
                                allocated range.                                        
  @param  Attributes            The requested bit mask of attributes for the allocated range.
                                  
  @retval EFI_SUCCESS           The requested memory pages were allocated.
  @retval EFI_UNSUPPORTED       Attributes is unsupported. The only legal attribute bits are
                                MEMORY_WRITE_COMBINE and MEMORY_CACHED.                     
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
  @retval EFI_OUT_OF_RESOURCES  The memory pages could not be allocated.  
                                   
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_ALLOCATE_BUFFER)(
  IN     EDKII_UFS_HOST_CONTROLLER_PROTOCOL   *This,
  IN     EFI_ALLOCATE_TYPE                    Type,
  IN     EFI_MEMORY_TYPE                      MemoryType,
  IN     UINTN                                Pages,
     OUT VOID                                 **HostAddress,
  IN     UINT64                               Attributes
  );

/**                                                                 
  Frees memory that was allocated with AllocateBuffer().
            
  @param  This                  A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.  
  @param  Pages                 The number of pages to free.                                
  @param  HostAddress           The base system memory address of the allocated range.                                    
                                  
  @retval EFI_SUCCESS           The requested memory pages were freed.
  @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
                                was not allocated with AllocateBuffer().
                                     
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_FREE_BUFFER)(
  IN  EDKII_UFS_HOST_CONTROLLER_PROTOCOL   *This,
  IN  UINTN                                Pages,
  IN  VOID                                 *HostAddress
  );

/**                                                                 
  Flushes all posted write transactions from the UFS bus to attached UFS device.
            
  @param  This                  A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.  
                                  
  @retval EFI_SUCCESS           The posted write transactions were flushed from the UFS bus
                                to attached UFS device.                                      
  @retval EFI_DEVICE_ERROR      The posted write transactions were not flushed from the UFS
                                bus to attached UFS device due to a hardware error.                           
                                     
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_FLUSH)(
  IN  EDKII_UFS_HOST_CONTROLLER_PROTOCOL   *This
  );

typedef enum {
  EfiUfsHcWidthUint8      = 0,
  EfiUfsHcWidthUint16,
  EfiUfsHcWidthUint32,
  EfiUfsHcWidthUint64,
  EfiUfsHcWidthMaximum
} EDKII_UFS_HOST_CONTROLLER_PROTOCOL_WIDTH;

/**
  Enable a UFS bus driver to access UFS MMIO registers in the UFS Host Controller memory space.

  @param  This                  A pointer to the EDKII_UFS_HOST_CONTROLLER_PROTOCOL instance.
  @param  Width                 Signifies the width of the memory operations.
  @param  Offset                The offset within the UFS Host Controller MMIO space to start the
                                memory operation.
  @param  Count                 The number of memory operations to perform.
  @param  Buffer                For read operations, the destination buffer to store the results.
                                For write operations, the source buffer to write data from.

  @retval EFI_SUCCESS           The data was read from or written to the UFS host controller.
  @retval EFI_UNSUPPORTED       The address range specified by Offset, Width, and Count is not
                                valid for the UFS Host Controller memory space.
  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_UFS_HC_MMIO_READ_WRITE)(
  IN     EDKII_UFS_HOST_CONTROLLER_PROTOCOL        *This,
  IN     EDKII_UFS_HOST_CONTROLLER_PROTOCOL_WIDTH  Width,
  IN     UINT64                                    Offset,
  IN     UINTN                                     Count,
  IN OUT VOID                                      *Buffer
  );

///
///  UFS Host Controller Protocol structure.
///
struct _EDKII_UFS_HOST_CONTROLLER_PROTOCOL {
  EDKII_UFS_HC_GET_MMIO_BAR           GetUfsHcMmioBar;
  EDKII_UFS_HC_ALLOCATE_BUFFER        AllocateBuffer;
  EDKII_UFS_HC_FREE_BUFFER            FreeBuffer;
  EDKII_UFS_HC_MAP                    Map;
  EDKII_UFS_HC_UNMAP                  Unmap;
  EDKII_UFS_HC_FLUSH                  Flush;
  EDKII_UFS_HC_MMIO_READ_WRITE        Read;
  EDKII_UFS_HC_MMIO_READ_WRITE        Write;
};

///
///  UFS Host Controller Protocol GUID variable.
///
extern EFI_GUID gEdkiiUfsHostControllerProtocolGuid;

#endif