Ronak Kanabar | 1ae366f | 2023-06-07 01:21:56 +0530 | [diff] [blame^] | 1 | /** @file |
| 2 | The Super I/O Protocol is installed by the Super I/O driver. The Super I/O driver is a UEFI driver |
| 3 | model compliant driver. In the Start() routine of the Super I/O driver, a handle with an instance |
| 4 | of EFI_SIO_PROTOCOL is created for each device within the Super I/O. The device within the |
| 5 | Super I/O is powered up, enabled, and assigned with the default set of resources. In the Stop() |
| 6 | routine of the Super I/O driver, the device is disabled and Super I/O protocol is uninstalled. |
| 7 | |
| 8 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> |
| 9 | SPDX-License-Identifier: BSD-2-Clause-Patent |
| 10 | |
| 11 | **/ |
| 12 | |
| 13 | #ifndef __EFI_SUPER_IO_PROTOCOL_H__ |
| 14 | #define __EFI_SUPER_IO_PROTOCOL_H__ |
| 15 | #include <IndustryStandard/Acpi.h> |
| 16 | |
| 17 | #define EFI_SIO_PROTOCOL_GUID \ |
| 18 | { 0x215fdd18, 0xbd50, 0x4feb, { 0x89, 0xb, 0x58, 0xca, 0xb, 0x47, 0x39, 0xe9 } } |
| 19 | |
| 20 | typedef union { |
| 21 | ACPI_SMALL_RESOURCE_HEADER *SmallHeader; |
| 22 | ACPI_LARGE_RESOURCE_HEADER *LargeHeader; |
| 23 | } ACPI_RESOURCE_HEADER_PTR; |
| 24 | |
| 25 | typedef struct { |
| 26 | UINT8 Register; ///< Register number. |
| 27 | UINT8 AndMask; ///< Bitwise AND mask. |
| 28 | UINT8 OrMask; ///< Bitwise OR mask. |
| 29 | } EFI_SIO_REGISTER_MODIFY; |
| 30 | |
| 31 | typedef struct _EFI_SIO_PROTOCOL EFI_SIO_PROTOCOL; |
| 32 | |
| 33 | /** |
| 34 | Provides a low level access to the registers for the Super I/O. |
| 35 | |
| 36 | @param[in] This Indicates a pointer to the calling context. |
| 37 | @param[in] Write Specifies the type of the register operation. If this parameter is TRUE, Value is |
| 38 | interpreted as an input parameter and the operation is a register write. If this parameter |
| 39 | is FALSE, Value is interpreted as an output parameter and the operation is a register |
| 40 | read. |
| 41 | @param[in] ExitCfgMode Exit Configuration Mode Indicator. If this parameter is set to TRUE, the Super I/O |
| 42 | driver will turn off configuration mode of the Super I/O prior to returning from this |
| 43 | function. If this parameter is set to FALSE, the Super I/O driver will leave Super I/O |
| 44 | in the configuration mode. |
| 45 | The Super I/O driver must track the current state of the Super I/O and enable the |
| 46 | configuration mode of Super I/O if necessary prior to register access. |
| 47 | @param[in] Register Register number. |
| 48 | @param[in, out] Value If Write is TRUE, Value is a pointer to the buffer containing the byte of data to be |
| 49 | written to the Super I/O register. If Write is FALSE, Value is a pointer to the |
| 50 | destination buffer for the byte of data to be read from the Super I/O register. |
| 51 | |
| 52 | @retval EFI_SUCCESS The operation completed successfully |
| 53 | @retval EFI_INVALID_PARAMETER The Value is NULL |
| 54 | @retval EFI_INVALID_PARAMETER Invalid Register number |
| 55 | |
| 56 | **/ |
| 57 | typedef |
| 58 | EFI_STATUS |
| 59 | (EFIAPI *EFI_SIO_REGISTER_ACCESS)( |
| 60 | IN CONST EFI_SIO_PROTOCOL *This, |
| 61 | IN BOOLEAN Write, |
| 62 | IN BOOLEAN ExitCfgMode, |
| 63 | IN UINT8 Register, |
| 64 | IN OUT UINT8 *Value |
| 65 | ); |
| 66 | |
| 67 | /** |
| 68 | Provides an interface to get a list of the current resources consumed by the device in the ACPI |
| 69 | Resource Descriptor format. |
| 70 | |
| 71 | GetResources() returns a list of resources currently consumed by the device. The |
| 72 | ResourceList is a pointer to the buffer containing resource descriptors for the device. The |
| 73 | descriptors are in the format of Small or Large ACPI resource descriptor as defined by ACPI |
| 74 | specification (2.0 & 3.0). The buffer of resource descriptors is terminated with the 'End tag' |
| 75 | resource descriptor. |
| 76 | |
| 77 | @param[in] This Indicates a pointer to the calling context. |
| 78 | @param[out] ResourceList A pointer to an ACPI resource descriptor list that defines the current resources used by |
| 79 | the device. Type ACPI_RESOURCE_HEADER_PTR is defined in the "Related |
| 80 | Definitions" below. |
| 81 | |
| 82 | @retval EFI_SUCCESS The operation completed successfully |
| 83 | @retval EFI_INVALID_PARAMETER ResourceList is NULL |
| 84 | |
| 85 | **/ |
| 86 | typedef |
| 87 | EFI_STATUS |
| 88 | (EFIAPI *EFI_SIO_GET_RESOURCES)( |
| 89 | IN CONST EFI_SIO_PROTOCOL *This, |
| 90 | OUT ACPI_RESOURCE_HEADER_PTR *ResourceList |
| 91 | ); |
| 92 | |
| 93 | /** |
| 94 | Sets the resources for the device. |
| 95 | |
| 96 | @param[in] This Indicates a pointer to the calling context. |
| 97 | @param[in] ResourceList Pointer to the ACPI resource descriptor list. Type ACPI_RESOURCE_HEADER_PTR |
| 98 | is defined in the "Related Definitions" section of |
| 99 | EFI_SIO_PROTOCOL.GetResources(). |
| 100 | |
| 101 | @retval EFI_SUCCESS The operation completed successfully |
| 102 | @retval EFI_INVALID_PARAMETER ResourceList is invalid |
| 103 | @retval EFI_ACCESS_DENIED Some of the resources in ResourceList are in use |
| 104 | |
| 105 | **/ |
| 106 | typedef |
| 107 | EFI_STATUS |
| 108 | (EFIAPI *EFI_SIO_SET_RESOURCES)( |
| 109 | IN CONST EFI_SIO_PROTOCOL *This, |
| 110 | IN ACPI_RESOURCE_HEADER_PTR ResourceList |
| 111 | ); |
| 112 | |
| 113 | /** |
| 114 | Provides a collection of resource descriptor lists. Each resource descriptor list in the collection |
| 115 | defines a combination of resources that can potentially be used by the device. |
| 116 | |
| 117 | @param[in] This Indicates a pointer to the calling context. |
| 118 | @param[out] ResourceCollection Collection of the resource descriptor lists. |
| 119 | |
| 120 | @retval EFI_SUCCESS The operation completed successfully |
| 121 | @retval EFI_INVALID_PARAMETER ResourceCollection is NULL |
| 122 | **/ |
| 123 | typedef |
| 124 | EFI_STATUS |
| 125 | (EFIAPI *EFI_SIO_POSSIBLE_RESOURCES)( |
| 126 | IN CONST EFI_SIO_PROTOCOL *This, |
| 127 | OUT ACPI_RESOURCE_HEADER_PTR *ResourceCollection |
| 128 | ); |
| 129 | |
| 130 | /** |
| 131 | Provides an interface for a table based programming of the Super I/O registers. |
| 132 | |
| 133 | The Modify() function provides an interface for table based programming of the Super I/O |
| 134 | registers. This function can be used to perform programming of multiple Super I/O registers with a |
| 135 | single function call. For each table entry, the Register is read, its content is bitwise ANDed with |
| 136 | AndMask, and then ORed with OrMask before being written back to the Register. The Super |
| 137 | I/O driver must track the current state of the Super I/O and enable the configuration mode of Super I/ |
| 138 | O if necessary prior to table processing. Once the table is processed, the Super I/O device has to be |
| 139 | returned to the original state. |
| 140 | |
| 141 | @param[in] This Indicates a pointer to the calling context. |
| 142 | @param[in] Command A pointer to an array of NumberOfCommands EFI_SIO_REGISTER_MODIFY |
| 143 | structures. Each structure specifies a single Super I/O register modify operation. Type |
| 144 | EFI_SIO_REGISTER_MODIFY is defined in the "Related Definitions" below. |
| 145 | @param[in] NumberOfCommands Number of elements in the Command array. |
| 146 | |
| 147 | @retval EFI_SUCCESS The operation completed successfully |
| 148 | @retval EFI_INVALID_PARAMETER Command is NULL |
| 149 | |
| 150 | **/ |
| 151 | typedef |
| 152 | EFI_STATUS |
| 153 | (EFIAPI *EFI_SIO_MODIFY)( |
| 154 | IN CONST EFI_SIO_PROTOCOL *This, |
| 155 | IN CONST EFI_SIO_REGISTER_MODIFY *Command, |
| 156 | IN UINTN NumberOfCommands |
| 157 | ); |
| 158 | |
| 159 | struct _EFI_SIO_PROTOCOL { |
| 160 | EFI_SIO_REGISTER_ACCESS RegisterAccess; |
| 161 | EFI_SIO_GET_RESOURCES GetResources; |
| 162 | EFI_SIO_SET_RESOURCES SetResources; |
| 163 | EFI_SIO_POSSIBLE_RESOURCES PossibleResources; |
| 164 | EFI_SIO_MODIFY Modify; |
| 165 | }; |
| 166 | |
| 167 | extern EFI_GUID gEfiSioProtocolGuid; |
| 168 | |
| 169 | #endif // __EFI_SUPER_IO_PROTOCOL_H__ |