MdePkg/Include/Protocol/UfsDeviceConfig.h

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

  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

  @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