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/** @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
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