MdePkg/Include/Protocol/UfsDeviceConfig.h

/** @file
  This file defines the EFI UFS Device Config Protocol.

  Copyright (c) 2017, 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
  which 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.

  @par Revision Reference:
  This Protocol is introduced in UEFI Specification 2.7

**/

#ifndef __UFS_DEVICE_CONFIG_PROTOCOL_H__
#define __UFS_DEVICE_CONFIG_PROTOCOL_H__

//
// EFI UFS Device Config Protocol GUID value
//
#define EFI_UFS_DEVICE_CONFIG_GUID \
  { 0xb81bfab0, 0xeb3, 0x4cf9, { 0x84, 0x65, 0x7f, 0xa9, 0x86, 0x36, 0x16, 0x64 }};

//
// Forward reference for pure ANSI compatability
//
typedef struct _EFI_UFS_DEVICE_CONFIG_PROTOCOL  EFI_UFS_DEVICE_CONFIG_PROTOCOL;

/**
  Read or write specified device descriptor of a UFS device.

  The service is used to read/write UFS device descriptors. The consumer of this API is responsible
  for allocating the data buffer pointed by Descriptor.

  @param[in]      This          The pointer to the EFI_UFS_DEVICE_CONFIG_PROTOCOL instance.
  @param[in]      Read          The boolean variable to show r/w direction.
  @param[in]      DescId        The ID of device descriptor.
  @param[in]      Index         The Index of device descriptor.
  @param[in]      Selector      The Selector of device descriptor.
  @param[in, out] Descriptor    The buffer of device descriptor to be read or written.
  @param[in, out] DescSize      The size of device descriptor buffer. On input, the size, in bytes,
                                of the data buffer specified by Descriptor. On output, the number
                                of bytes that were actually transferred.

  @retval EFI_SUCCESS           The device descriptor is read/written successfully.
  @retval EFI_INVALID_PARAMETER This is NULL or Descriptor is NULL or DescSize is NULL.
                                DescId, Index and Selector are invalid combination to point to a
                                type of UFS device descriptor.
  @retval EFI_DEVICE_ERROR      The device descriptor is not read/written successfully.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UFS_DEVICE_CONFIG_RW_DESCRIPTOR) (
  IN EFI_UFS_DEVICE_CONFIG_PROTOCOL    *This,
  IN BOOLEAN                           Read,
  IN UINT8                             DescId,
  IN UINT8                             Index,
  IN UINT8                             Selector,
  IN OUT UINT8                         *Descriptor,
  IN OUT UINT32                        *DescSize
  );

/**
  Read or write specified flag of a UFS device.

  The service is used to read/write UFS flag descriptors. The consumer of this API is responsible
  for allocating the buffer pointed by Flag. The buffer size is 1 byte as UFS flag descriptor is
  just a single Boolean value that represents a TRUE or FALSE, '0' or '1', ON or OFF type of value.

  @param[in]      This          The pointer to the EFI_UFS_DEVICE_CONFIG_PROTOCOL instance.
  @param[in]      Read          The boolean variable to show r/w direction.
  @param[in]      FlagId        The ID of flag to be read or written.
  @param[in, out] Flag          The buffer to set or clear flag.

  @retval EFI_SUCCESS           The flag descriptor is set/clear successfully.
  @retval EFI_INVALID_PARAMETER This is NULL or Flag is NULL.
                                FlagId is an invalid UFS flag ID.
  @retval EFI_DEVICE_ERROR      The flag is not set/clear successfully.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UFS_DEVICE_CONFIG_RW_FLAG) (
  IN EFI_UFS_DEVICE_CONFIG_PROTOCOL    *This,
  IN BOOLEAN                           Read,
  IN UINT8                             FlagId,
  IN OUT UINT8                         *Flag
  );

/**
  Read or write specified attribute of a UFS device.

  The service is used to read/write UFS attributes. The consumer of this API is responsible for
  allocating the data buffer pointed by Attribute.

  @param[in]      This          The pointer to the EFI_UFS_DEVICE_CONFIG_PROTOCOL instance.
  @param[in]      Read          The boolean variable to show r/w direction.
  @param[in]      AttrId        The ID of Attribute.
  @param[in]      Index         The Index of Attribute.
  @param[in]      Selector      The Selector of Attribute.
  @param[in, out] Attribute     The buffer of Attribute to be read or written.
  @param[in, out] AttrSize      The size of Attribute buffer. On input, the size, in bytes, of the
                                data buffer specified by Attribute. On output, the number of bytes
                                that were actually transferred.

  @retval EFI_SUCCESS           The attribute is read/written successfully.
  @retval EFI_INVALID_PARAMETER This is NULL or Attribute is NULL or AttrSize is NULL.
                                AttrId, Index and Selector are invalid combination to point to a
                                type of UFS attribute.
  @retval EFI_DEVICE_ERROR      The attribute is not read/written successfully.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_UFS_DEVICE_CONFIG_RW_ATTRIBUTE) (
  IN EFI_UFS_DEVICE_CONFIG_PROTOCOL    *This,
  IN BOOLEAN                           Read,
  IN UINT8                             AttrId,
  IN UINT8                             Index,
  IN UINT8                             Selector,
  IN OUT UINT8                         *Attribute,
  IN OUT UINT32                        *AttrSize
  );

///
/// UFS Device Config Protocol structure.
///
struct _EFI_UFS_DEVICE_CONFIG_PROTOCOL {
  EFI_UFS_DEVICE_CONFIG_RW_DESCRIPTOR    RwUfsDescriptor;
  EFI_UFS_DEVICE_CONFIG_RW_FLAG          RwUfsFlag;
  EFI_UFS_DEVICE_CONFIG_RW_ATTRIBUTE     RwUfsAttribute;
};

///
/// UFS Device Config Protocol GUID variable.
///
extern EFI_GUID gEfiUfsDeviceConfigProtocolGuid;

#endif