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878ddf1f | 1 | /*++\r |
2 | \r | |
98419ef4 | 3 | Copyright (c) 2006 - 2007, Intel Corporation\r |
4 | All rights reserved. This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
878ddf1f | 11 | \r |
12 | Module Name:\r | |
13 | \r | |
14 | PciCommand.c\r | |
98419ef4 | 15 | \r |
878ddf1f | 16 | Abstract:\r |
17 | \r | |
18 | PCI Bus Driver\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
f0ec738d | 24 | #include "pcibus.h"\r |
878ddf1f | 25 | \r |
26 | EFI_STATUS\r | |
27 | PciOperateRegister (\r | |
28 | IN PCI_IO_DEVICE *PciIoDevice,\r | |
29 | IN UINT16 Command,\r | |
30 | IN UINT8 Offset,\r | |
31 | IN UINT8 Operation,\r | |
32 | OUT UINT16 *PtrCommand\r | |
33 | )\r | |
34 | /*++\r | |
35 | \r | |
36 | Routine Description:\r | |
37 | \r | |
38 | Arguments:\r | |
39 | \r | |
40 | Returns:\r | |
41 | \r | |
42 | None\r | |
43 | \r | |
44 | --*/\r | |
45 | // TODO: PciIoDevice - add argument and description to function comment\r | |
46 | // TODO: Command - add argument and description to function comment\r | |
47 | // TODO: Offset - add argument and description to function comment\r | |
48 | // TODO: Operation - add argument and description to function comment\r | |
49 | // TODO: PtrCommand - add argument and description to function comment\r | |
50 | {\r | |
51 | UINT16 OldCommand;\r | |
52 | EFI_STATUS Status;\r | |
53 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
54 | \r | |
55 | OldCommand = 0;\r | |
56 | PciIo = &PciIoDevice->PciIo;\r | |
57 | \r | |
58 | if (Operation != EFI_SET_REGISTER) {\r | |
98419ef4 | 59 | Status = PciIoRead (\r |
60 | PciIo,\r | |
61 | EfiPciIoWidthUint16,\r | |
62 | Offset,\r | |
63 | 1,\r | |
64 | &OldCommand\r | |
65 | );\r | |
878ddf1f | 66 | \r |
67 | if (Operation == EFI_GET_REGISTER) {\r | |
68 | *PtrCommand = OldCommand;\r | |
69 | return Status;\r | |
70 | }\r | |
71 | }\r | |
72 | \r | |
73 | if (Operation == EFI_ENABLE_REGISTER) {\r | |
1cc8ee78 | 74 | OldCommand = (UINT16) (OldCommand | Command);\r |
878ddf1f | 75 | } else if (Operation == EFI_DISABLE_REGISTER) {\r |
1cc8ee78 | 76 | OldCommand = (UINT16) (OldCommand & ~(Command));\r |
878ddf1f | 77 | } else {\r |
78 | OldCommand = Command;\r | |
79 | }\r | |
80 | \r | |
98419ef4 | 81 | return PciIoWrite (\r |
878ddf1f | 82 | PciIo,\r |
83 | EfiPciIoWidthUint16,\r | |
84 | Offset,\r | |
85 | 1,\r | |
86 | &OldCommand\r | |
98419ef4 | 87 | );\r |
878ddf1f | 88 | }\r |
89 | \r | |
90 | BOOLEAN\r | |
91 | PciCapabilitySupport (\r | |
92 | IN PCI_IO_DEVICE *PciIoDevice\r | |
93 | )\r | |
94 | /*++\r | |
95 | \r | |
96 | Routine Description:\r | |
97 | \r | |
98 | Arguments:\r | |
99 | \r | |
100 | Returns:\r | |
98419ef4 | 101 | \r |
878ddf1f | 102 | None\r |
103 | \r | |
104 | --*/\r | |
105 | // TODO: PciIoDevice - add argument and description to function comment\r | |
106 | {\r | |
107 | \r | |
108 | if (PciIoDevice->Pci.Hdr.Status & EFI_PCI_STATUS_CAPABILITY) {\r | |
109 | return TRUE;\r | |
110 | }\r | |
111 | \r | |
112 | return FALSE;\r | |
113 | }\r | |
114 | \r | |
115 | EFI_STATUS\r | |
116 | LocateCapabilityRegBlock (\r | |
117 | IN PCI_IO_DEVICE *PciIoDevice,\r | |
118 | IN UINT8 CapId,\r | |
119 | IN OUT UINT8 *Offset,\r | |
120 | OUT UINT8 *NextRegBlock OPTIONAL\r | |
121 | )\r | |
122 | /*++\r | |
123 | \r | |
124 | Routine Description:\r | |
125 | Locate cap reg.\r | |
126 | \r | |
127 | Arguments:\r | |
128 | PciIoDevice - A pointer to the PCI_IO_DEVICE.\r | |
129 | CapId - The cap ID.\r | |
130 | Offset - A pointer to the offset.\r | |
131 | NextRegBlock - A pointer to the next block.\r | |
132 | \r | |
133 | Returns:\r | |
98419ef4 | 134 | \r |
878ddf1f | 135 | None\r |
136 | \r | |
137 | --*/\r | |
138 | // TODO: EFI_UNSUPPORTED - add return value to function comment\r | |
139 | // TODO: EFI_SUCCESS - add return value to function comment\r | |
140 | // TODO: EFI_NOT_FOUND - add return value to function comment\r | |
141 | {\r | |
142 | UINT8 CapabilityPtr;\r | |
143 | UINT16 CapabilityEntry;\r | |
144 | UINT8 CapabilityID;\r | |
145 | \r | |
146 | //\r | |
147 | // To check the cpability of this device supports\r | |
148 | //\r | |
149 | if (!PciCapabilitySupport (PciIoDevice)) {\r | |
150 | return EFI_UNSUPPORTED;\r | |
151 | }\r | |
152 | \r | |
153 | if (*Offset != 0) {\r | |
154 | CapabilityPtr = *Offset;\r | |
155 | } else {\r | |
156 | \r | |
157 | CapabilityPtr = 0;\r | |
158 | if (IS_CARDBUS_BRIDGE (&PciIoDevice->Pci)) {\r | |
159 | \r | |
98419ef4 | 160 | PciIoRead (\r |
161 | &PciIoDevice->PciIo,\r | |
162 | EfiPciIoWidthUint8,\r | |
163 | EFI_PCI_CARDBUS_BRIDGE_CAPABILITY_PTR,\r | |
164 | 1,\r | |
165 | &CapabilityPtr\r | |
166 | );\r | |
878ddf1f | 167 | } else {\r |
168 | \r | |
98419ef4 | 169 | PciIoRead (\r |
170 | &PciIoDevice->PciIo,\r | |
171 | EfiPciIoWidthUint8,\r | |
172 | EFI_PCI_CAPABILITY_PTR,\r | |
173 | 1,\r | |
174 | &CapabilityPtr\r | |
175 | );\r | |
878ddf1f | 176 | }\r |
177 | }\r | |
178 | \r | |
179 | while (CapabilityPtr > 0x3F) {\r | |
180 | //\r | |
181 | // Mask it to DWORD alignment per PCI spec\r | |
182 | //\r | |
183 | CapabilityPtr &= 0xFC;\r | |
98419ef4 | 184 | PciIoRead (\r |
185 | &PciIoDevice->PciIo,\r | |
186 | EfiPciIoWidthUint16,\r | |
187 | CapabilityPtr,\r | |
188 | 1,\r | |
189 | &CapabilityEntry\r | |
190 | );\r | |
878ddf1f | 191 | \r |
192 | CapabilityID = (UINT8) CapabilityEntry;\r | |
193 | \r | |
194 | if (CapabilityID == CapId) {\r | |
195 | *Offset = CapabilityPtr;\r | |
196 | if (NextRegBlock != NULL) {\r | |
197 | *NextRegBlock = (UINT8) (CapabilityEntry >> 8);\r | |
198 | }\r | |
199 | \r | |
200 | return EFI_SUCCESS;\r | |
201 | }\r | |
202 | \r | |
203 | CapabilityPtr = (UINT8) (CapabilityEntry >> 8);\r | |
204 | }\r | |
205 | \r | |
206 | return EFI_NOT_FOUND;\r | |
207 | }\r |