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79964ac8 1/** @file\r
4a71b21a 2 This file declares Smbus PPI which provides the basic I/O interfaces that a PEIM \r
3 uses to access its SMBus controller and the slave devices attached to it.\r
79964ac8 4\r
2bbaeb0d 5 Copyright (c) 2007 - 2009, Intel Corporation\r
79964ac8 6 All rights reserved. This program and the accompanying materials\r
7 are licensed and made available under the terms and conditions of the BSD License\r
8 which accompanies this distribution. The full text of the license may be found at\r
9 http://opensource.org/licenses/bsd-license.php\r
10\r
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
13\r
79964ac8 14 @par Revision Reference:\r
15 This PPI is defined in Framework of EFI SmBus PPI spec.\r
16 Version 0.9\r
17\r
18**/\r
19\r
4ebb0d9e 20#ifndef _PEI_SMBUS_PPI_H_\r
21#define _PEI_SMBUS_PPI_H_\r
79964ac8 22\r
3f3181b4 23#include <Ppi/Smbus2.h>\r
79964ac8 24\r
25#define EFI_PEI_SMBUS_PPI_GUID \\r
26 { \\r
27 0xabd42895, 0x78cf, 0x4872, {0x84, 0x44, 0x1b, 0x5c, 0x18, 0xb, 0xfb, 0xda } \\r
28 }\r
29\r
30typedef struct _EFI_PEI_SMBUS_PPI EFI_PEI_SMBUS_PPI;\r
31\r
32/**\r
33 Executes an SMBus operation to an SMBus controller.\r
34\r
516e9f28 35 @param[in] PeiServices A pointer to the system PEI Services Table.\r
36 @param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.\r
37 @param[in] SlaveAddress The SMBUS hardware address to which the SMBUS\r
38 device is preassigned or allocated.\r
39 @param[in] Command This command is transmitted by the SMBus host\r
40 controller to the SMBus slave device and the interpretation is\r
41 SMBus slave device specific.\r
42 @param[in] Operation Signifies which particular SMBus hardware protocol\r
43 instance that it will use to execute the SMBus transactions.\r
44 @param[in] PecCheck Defines if Packet Error Code (PEC) checking is required\r
45 for this operation.\r
46 @param[in, out] Length Signifies the number of bytes that this operation will do.\r
47 @param[in, out] Buffer Contains the value of data to execute to the SMBus slave device.\r
79964ac8 48\r
49 @retval EFI_SUCCESS The last data that was returned from the access\r
50 matched the poll exit criteria.\r
9ca1b12e 51 @retval EFI_CRC_ERROR The checksum is not correct (PEC is incorrect).\r
79964ac8 52 @retval EFI_TIMEOUT Timeout expired before the operation was completed.\r
53 Timeout is determined by the SMBus host controller device.\r
54 @retval EFI_OUT_OF_RESOURCES The request could not be completed\r
55 due to a lack of resources.\r
56 @retval EFI_DEVICE_ERROR The request was not completed because\r
57 a failure reflected in the Host Status Register bit.\r
58 @retval EFI_INVALID_PARAMETER Operation is not defined in EFI_SMBUS_OPERATION.\r
9ca1b12e 59 @retval EFI_INVALID_PARAMETER Length/Buffer is NULL for operations except for EfiSmbusQuickRead and\r
79964ac8 60 EfiSmbusQuickWrite. Length is outside the range of valid values.\r
61 @retval EFI_UNSUPPORTED The SMBus operation or PEC is not supported.\r
62 @retval EFI_BUFFER_TOO_SMALL Buffer is not sufficient for this operation.\r
63\r
64**/\r
65typedef\r
66EFI_STATUS\r
69686d56 67(EFIAPI *EFI_PEI_SMBUS_PPI_EXECUTE_OPERATION)(\r
79964ac8 68 IN EFI_PEI_SERVICES **PeiServices,\r
700a7869 69 IN EFI_PEI_SMBUS_PPI *This,\r
79964ac8 70 IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
71 IN EFI_SMBUS_DEVICE_COMMAND Command,\r
72 IN EFI_SMBUS_OPERATION Operation,\r
73 IN BOOLEAN PecCheck,\r
74 IN OUT UINTN *Length,\r
75 IN OUT VOID *Buffer\r
76 );\r
77\r
79964ac8 78/**\r
79 CallBack function can be registered in EFI_PEI_SMBUS_PPI_NOTIFY.\r
80\r
2a924b00 81 This function is user-defined and will called when the SlaveAddress/Data pair happens.\r
82\r
516e9f28 83 @param[in] PeiServices A pointer to the system PEI Services Table.\r
84 @param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.\r
85 @param[in] SlaveAddress The SMBUS hardware address to which the SMBUS\r
86 device is preassigned or allocated.\r
87 @param[in] Data Data of the SMBus host notify command that\r
88 the caller wants to be called.\r
79964ac8 89\r
9ca1b12e 90 @return Status Code returned by callback function.\r
79964ac8 91\r
92**/\r
93typedef\r
94EFI_STATUS\r
69686d56 95(EFIAPI *EFI_PEI_SMBUS_NOTIFY_FUNCTION)(\r
79964ac8 96 IN EFI_PEI_SERVICES **PeiServices,\r
700a7869 97 IN EFI_PEI_SMBUS_PPI *SmbusPpi,\r
79964ac8 98 IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
99 IN UINTN Data\r
100 );\r
101\r
102/**\r
103 The ArpDevice() function enumerates the entire bus or enumerates a specific\r
104 device that is identified by SmbusUdid.\r
105\r
516e9f28 106 @param[in] PeiServices A pointer to the system PEI Services Table.\r
107 @param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.\r
108 @param[in] ArpAll A Boolean expression that indicates if the host drivers need\r
109 to enumerate all the devices or enumerate only the device that is identified\r
110 by SmbusUdid. If ArpAll is TRUE, SmbusUdid and SlaveAddress are optional.\r
111 If ArpAll is FALSE, ArpDevice will enumerate SmbusUdid and the address\r
112 will be at SlaveAddress.\r
113 @param[in] SmbusUdid The targeted SMBus Unique Device Identifier (UDID).\r
114 The UDID may not exist for SMBus devices with fixed addresses.\r
115 @param[in, out] SlaveAddress The new SMBus address for the slave device for\r
116 which the operation is targeted.\r
2a924b00 117 This address may be NULL.\r
79964ac8 118\r
119 @retval EFI_SUCCESS The SMBus slave device address was set.\r
120 @retval EFI_INVALID_PARAMETER SlaveAddress is NULL.\r
121 @retval EFI_OUT_OF_RESOURCES The request could not be completed\r
122 due to a lack of resources.\r
123 @retval EFI_TIMEOUT The SMBus slave device did not respond.\r
124 @retval EFI_DEVICE_ERROR The request was not completed because the transaction failed.\r
2a924b00 125 @retval EFI_UNSUPPORTED ArpDevice() are not implemented by this PEIM. \r
126 This return value is not defined in Framwork Specification.\r
127 This return value had been intruduced in PI Specification.\r
79964ac8 128\r
129**/\r
130typedef\r
131EFI_STATUS\r
69686d56 132(EFIAPI *EFI_PEI_SMBUS_PPI_ARP_DEVICE)(\r
79964ac8 133 IN EFI_PEI_SERVICES **PeiServices,\r
700a7869 134 IN EFI_PEI_SMBUS_PPI *This,\r
79964ac8 135 IN BOOLEAN ArpAll,\r
136 IN EFI_SMBUS_UDID *SmbusUdid, OPTIONAL\r
137 IN OUT EFI_SMBUS_DEVICE_ADDRESS *SlaveAddress OPTIONAL\r
138 );\r
139\r
79964ac8 140/**\r
141 The GetArpMap() function returns the mapping of all the SMBus devices\r
142 that are enumerated by the SMBus host driver.\r
143\r
516e9f28 144 @param[in] PeiServices A pointer to the system PEI Services Table.\r
145 @param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.\r
146 @param[in, out] Length Size of the buffer that contains the SMBus device map.\r
147 @param[in, out] SmbusDeviceMap The pointer to the device map as enumerated\r
148 by the SMBus controller driver.\r
79964ac8 149\r
2a924b00 150 @retval EFI_SUCCESS The device map was returned correctly in the buffer.\r
151 @retval EFI_UNSUPPORTED GetArpMap() are not implemented by this PEIM. \r
152 This return value was not defined in Framwork Specification.\r
153 This return value had been intruduced in PI Specification.\r
79964ac8 154\r
155**/\r
156typedef\r
157EFI_STATUS\r
69686d56 158(EFIAPI *EFI_PEI_SMBUS_PPI_GET_ARP_MAP)(\r
79964ac8 159 IN EFI_PEI_SERVICES **PeiServices,\r
700a7869 160 IN EFI_PEI_SMBUS_PPI *This,\r
79964ac8 161 IN OUT UINTN *Length,\r
162 IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap\r
163 );\r
164\r
165/**\r
9ca1b12e 166 Allows a device driver to register for a callback when the bus driver detects a state that it needs to \r
167 propagate to other PEIMs that are registered for a callback.\r
168\r
79964ac8 169 The Notify() function registers all the callback functions to allow the\r
170 bus driver to call these functions when the SlaveAddress/Data pair happens.\r
2a924b00 171 All functions to be registered with EFI_PEI_SMBUS_PPI_NOTIFY must be of type\r
172 EFI_PEI_SMBUS_NOTIFY_FUNCTION.\r
79964ac8 173\r
516e9f28 174 @param[in] PeiServices A pointer to the system PEI Services Table.\r
175 @param[in] This A pointer to the EFI_PEI_SMBUS_PPI instance.\r
176 @param[in] SlaveAddress Address that the host controller detects as\r
177 sending a message and calls all the registered functions.\r
178 @param[in] Data Data that the host controller detects as sending a message\r
179 and calls all the registered functions.\r
180 @param[in] NotifyFunction The function to call when the bus driver\r
181 detects the SlaveAddress and Data pair.\r
79964ac8 182\r
516e9f28 183 @retval EFI_SUCCESS NotifyFunction has been registered.\r
2a924b00 184 @retval EFI_UNSUPPORTED Notify() are not implemented by this PEIM. \r
185 This return value is not defined in Framwork Specification.\r
186 This return value had been intruduced in PI Specification.\r
79964ac8 187\r
188**/\r
189typedef\r
190EFI_STATUS\r
69686d56 191(EFIAPI *EFI_PEI_SMBUS_PPI_NOTIFY)(\r
9ca1b12e 192 IN EFI_PEI_SERVICES **PeiServices,\r
193 IN EFI_PEI_SMBUS_PPI *This,\r
194 IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress,\r
195 IN UINTN Data,\r
700a7869 196 IN EFI_PEI_SMBUS_NOTIFY_FUNCTION NotifyFunction\r
79964ac8 197 );\r
198\r
9ca1b12e 199///\r
200/// Provides the basic I/O interfaces that a PEIM uses to access\r
201/// its SMBus controller and the slave devices attached to it.\r
202///\r
79964ac8 203struct _EFI_PEI_SMBUS_PPI {\r
2bbaeb0d 204 ///\r
205 /// Executes the SMBus operation to an SMBus slave device.\r
206 ///\r
79964ac8 207 EFI_PEI_SMBUS_PPI_EXECUTE_OPERATION Execute;\r
2bbaeb0d 208 \r
209 ///\r
210 /// Allows an SMBus 2.0 device(s) to be Address Resolution Protocol (ARP)\r
211 ///\r
79964ac8 212 EFI_PEI_SMBUS_PPI_ARP_DEVICE ArpDevice;\r
2bbaeb0d 213 \r
214 ///\r
215 /// Allows a PEIM to retrieve the address that was allocated by the SMBus\r
216 /// host controller during enumeration/ARP. \r
217 ///\r
79964ac8 218 EFI_PEI_SMBUS_PPI_GET_ARP_MAP GetArpMap;\r
2bbaeb0d 219 \r
220 ///\r
221 /// Allows a driver to register for a callback to the SMBus host\r
222 /// controller driver when the bus issues a notification to the bus controller PEIM. \r
223 ///\r
79964ac8 224 EFI_PEI_SMBUS_PPI_NOTIFY Notify;\r
225};\r
226\r
227extern EFI_GUID gEfiPeiSmbusPpiGuid;\r
228\r
229#endif\r