1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/** @file
PCH SMBus Driver.
Copyright (c) 2018, 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.
**/
#include "PchSmbus.h"
#include <Library/ConfigBlockLib.h>
extern EFI_GUID gEfiSmbusArpMapGuid;
/**
Execute an SMBus operation
@param[in] This The protocol instance
@param[in] SlaveAddress The address of the SMBUS slave device
@param[in] Command The SMBUS command
@param[in] Operation Which SMBus protocol will be issued
@param[in] PecCheck If Packet Error Code Checking is to be used
@param[in, out] Length Length of data
@param[in, out] Buffer Data buffer
@retval EFI_SUCCESS The SMBUS operation is successful
@retval Others Something error occurred
**/
EFI_STATUS
EFIAPI
SmbusExecute (
IN CONST EFI_SMBUS_HC_PROTOCOL *This,
IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,
IN EFI_SMBUS_DEVICE_COMMAND Command,
IN EFI_SMBUS_OPERATION Operation,
IN BOOLEAN PecCheck,
IN OUT UINTN *Length,
IN OUT VOID *Buffer
)
{
DEBUG ((DEBUG_INFO, "SmbusExecute() Start, SmbusDeviceAddress=%x, Command=%x, Operation=%x\n", (SlaveAddress.SmbusDeviceAddress << 1), Command, Operation));
InitializeSmbusRegisters ();
return SmbusExec (
SlaveAddress,
Command,
Operation,
PecCheck,
Length,
Buffer
);
}
/**
<b>SMBus DXE Module Entry Point</b>\n
- <b>Introduction</b>\n
The SMBus module is a DXE driver that provides a standard way to execute an SMBus command.
- @pre
- @link SC_POLICY SC_POLICY_HOB @endlink
- This module uses the parameters in SmbusConfig for platform reserved (non ARP capable) addresses.
- @result
The SMBus driver produces EFI_SMBUS_HC_PROTOCOL which is documented in the SMBus Host Controller
Protocol Specification.
@param[in] ImageHandle ImageHandle of this module
@param[in] SystemTable EFI System Table
@retval EFI_SUCCESS Driver initializes successfully
@retval Others Some error occurred
**/
EFI_STATUS
EFIAPI
InitializeScSmbus (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
SC_POLICY_HOB *ScPolicy;
EFI_STATUS Status;
UINTN DataSize;
VOID *Data;
EFI_PEI_HOB_POINTERS HobList;
SC_SMBUS_CONFIG *SmbusConfig;
DEBUG ((DEBUG_INFO, "InitializeScSmbus() Start\n"));
HobList.Guid = GetFirstGuidHob (&gScPolicyHobGuid);
ASSERT (HobList.Guid != NULL);
ScPolicy = GET_GUID_HOB_DATA (HobList.Guid);
Status = GetConfigBlock ((VOID *) ScPolicy, &gSmbusConfigGuid, (VOID *) &SmbusConfig);
ASSERT_EFI_ERROR (Status);
mSmbusContext = AllocateZeroPool (sizeof (SMBUS_INSTANCE));
if (mSmbusContext == NULL) {
ASSERT (FALSE);
return EFI_OUT_OF_RESOURCES;
}
mSmbusContext->Signature = PCH_SMBUS_PRIVATE_DATA_SIGNATURE;
mSmbusContext->IoDone = IoDone;
mSmbusContext->SmbusIoRead = SmbusIoRead;
mSmbusContext->SmbusIoWrite = SmbusIoWrite;
mSmbusContext->SmbusController.Execute = SmbusExecute;
mSmbusContext->SmbusController.ArpDevice = SmbusArpDevice;
mSmbusContext->SmbusController.GetArpMap = SmbusGetArpMap;
mSmbusContext->SmbusController.Notify = SmbusNotify;
mSmbusContext->PlatformNumRsvd = SmbusConfig->NumRsvdSmbusAddresses;
mSmbusContext->PlatformRsvdAddr = SmbusConfig->RsvdSmbusAddressTable;
ASSERT (mSmbusContext->PlatformNumRsvd <= SC_MAX_SMBUS_RESERVED_ADDRESS);
//
// See if PEI already ARPed any devices, and if so, update our device map.
//
// Get Hob list
//
Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, (VOID **) &HobList.Raw);
ASSERT_EFI_ERROR (Status);
HobList.Raw = GetNextGuidHob (&gEfiSmbusArpMapGuid, HobList.Raw);
//
// If we found the right hob, store the information. Otherwise, continue.
//
if (HobList.Raw != NULL) {
Data = (VOID *) ((UINT8 *) (&HobList.Guid->Name) + sizeof (EFI_GUID));
DataSize = HobList.Header->HobLength - sizeof (EFI_HOB_GUID_TYPE);
CopyMem (mSmbusContext->DeviceMap, Data, DataSize);
mSmbusContext->DeviceMapEntries = (UINT8) (DataSize / sizeof (EFI_SMBUS_DEVICE_MAP));
}
//
// Initialize the NotifyFunctionList
//
InitializeListHead (&mSmbusContext->NotifyFunctionList);
//
// Install the SMBus interface
//
Status = gBS->InstallMultipleProtocolInterfaces (
&mSmbusContext->Handle,
&gEfiSmbusHcProtocolGuid,
&mSmbusContext->SmbusController,
NULL
);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "InitializeScSmbus() End\n"));
return EFI_SUCCESS;
}
|
