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
|
/** @file
PCH Smbus Driver
@copyright
Copyright (c) 2004 - 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#include "PchSmbus.h"
EFI_GUID mEfiSmbusArpMapGuid = EFI_SMBUS_ARP_MAP_GUID;
/**
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 Other Values Something error occurred
**/
EFI_STATUS
EFIAPI
SmbusExecute (
IN 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 ((EFI_D_INFO, "SmbusExecute() Start, SmbusDeviceAddress=%x, Command=%x, Operation=%x\n", (SlaveAddress.SmbusDeviceAddress << 1), Command, Operation));
InitializeSmbusRegisters ();
return SmbusExec (
SlaveAddress,
Command,
Operation,
PecCheck,
Length,
Buffer
);
}
/**
Smbus driver entry point
@param[in] ImageHandle ImageHandle of this module
@param[in] SystemTable EFI System Table
@retval EFI_SUCCESS Driver initializes successfully
@retval Other values Some error occurred
**/
EFI_STATUS
EFIAPI
InitializePchSmbus (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
DXE_PCH_PLATFORM_POLICY_PROTOCOL *PchPlatformPolicy;
EFI_STATUS Status;
UINTN DataSize;
VOID *Data;
EFI_PEI_HOB_POINTERS HobList;
DEBUG ((EFI_D_INFO, "InitializePchSmbus() Start\n"));
Status = gBS->LocateProtocol (
&gDxePchPlatformPolicyProtocolGuid,
NULL,
(VOID **) &PchPlatformPolicy
);
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 = PchPlatformPolicy->SmbusConfig->NumRsvdSmbusAddresses;
mSmbusContext->PlatformRsvdAddr = PchPlatformPolicy->SmbusConfig->RsvdSmbusAddressTable;
///
/// 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 (&mEfiSmbusArpMapGuid, 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,
&gEfiSmbusProtocolGuid,
&mSmbusContext->SmbusController,
NULL
);
ASSERT_EFI_ERROR (Status);
DEBUG ((EFI_D_INFO, "InitializePchSmbus() End\n"));
return EFI_SUCCESS;
}
|
