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04af8bf2 DG |
1 | /** @file\r |
2 | Platform Hook Library instance for UART device.\r | |
3 | \r | |
422e5d2f | 4 | Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>\r |
04af8bf2 DG |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include <Base.h>\r | |
422e5d2f GD |
10 | #include <PiDxe.h>\r |
11 | #include <UniversalPayload/SerialPortInfo.h>\r | |
04af8bf2 | 12 | #include <Library/PlatformHookLib.h>\r |
04af8bf2 | 13 | #include <Library/PcdLib.h>\r |
422e5d2f | 14 | #include <Library/HobLib.h>\r |
04af8bf2 | 15 | \r |
422e5d2f GD |
16 | /** Library Constructor\r |
17 | \r | |
18 | @retval RETURN_SUCCESS Success.\r | |
19 | **/\r | |
20 | EFI_STATUS\r | |
21 | EFIAPI\r | |
22 | PlatformHookSerialPortConstructor (\r | |
23 | VOID\r | |
24 | )\r | |
25 | {\r | |
26 | // Nothing to do here. This constructor is added to\r | |
27 | // enable the chain of constructor invocation for\r | |
28 | // dependent libraries.\r | |
29 | return RETURN_SUCCESS;\r | |
30 | }\r | |
04af8bf2 DG |
31 | \r |
32 | /**\r | |
33 | Performs platform specific initialization required for the CPU to access\r | |
34 | the hardware associated with a SerialPortLib instance. This function does\r | |
35 | not initialize the serial port hardware itself. Instead, it initializes\r | |
36 | hardware devices that are required for the CPU to access the serial port\r | |
37 | hardware. This function may be called more than once.\r | |
38 | \r | |
39 | @retval RETURN_SUCCESS The platform specific initialization succeeded.\r | |
40 | @retval RETURN_DEVICE_ERROR The platform specific initialization could not be completed.\r | |
41 | \r | |
42 | **/\r | |
43 | RETURN_STATUS\r | |
44 | EFIAPI\r | |
45 | PlatformHookSerialPortInitialize (\r | |
46 | VOID\r | |
47 | )\r | |
48 | {\r | |
422e5d2f GD |
49 | RETURN_STATUS Status;\r |
50 | UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO *SerialPortInfo;\r | |
51 | UINT8 *GuidHob;\r | |
52 | UNIVERSAL_PAYLOAD_GENERIC_HEADER *GenericHeader;\r | |
04af8bf2 | 53 | \r |
422e5d2f GD |
54 | GuidHob = GetFirstGuidHob (&gUniversalPayloadSerialPortInfoGuid);\r |
55 | if (GuidHob == NULL) {\r | |
56 | return EFI_NOT_FOUND;\r | |
04af8bf2 DG |
57 | }\r |
58 | \r | |
e5efcf8b | 59 | GenericHeader = (UNIVERSAL_PAYLOAD_GENERIC_HEADER *)GET_GUID_HOB_DATA (GuidHob);\r |
422e5d2f GD |
60 | if ((sizeof (UNIVERSAL_PAYLOAD_GENERIC_HEADER) > GET_GUID_HOB_DATA_SIZE (GuidHob)) || (GenericHeader->Length > GET_GUID_HOB_DATA_SIZE (GuidHob))) {\r |
61 | return EFI_NOT_FOUND;\r | |
04af8bf2 DG |
62 | }\r |
63 | \r | |
422e5d2f | 64 | if (GenericHeader->Revision == UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO_REVISION) {\r |
e5efcf8b | 65 | SerialPortInfo = (UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO *)GET_GUID_HOB_DATA (GuidHob);\r |
422e5d2f GD |
66 | if (GenericHeader->Length < UNIVERSAL_PAYLOAD_SIZEOF_THROUGH_FIELD (UNIVERSAL_PAYLOAD_SERIAL_PORT_INFO, RegisterBase)) {\r |
67 | //\r | |
68 | // Return if can't find the Serial Port Info Hob with enough length\r | |
69 | //\r | |
70 | return EFI_NOT_FOUND;\r | |
71 | }\r | |
04af8bf2 | 72 | \r |
422e5d2f GD |
73 | Status = PcdSetBoolS (PcdSerialUseMmio, SerialPortInfo->UseMmio);\r |
74 | if (RETURN_ERROR (Status)) {\r | |
75 | return Status;\r | |
76 | }\r | |
e5efcf8b | 77 | \r |
422e5d2f GD |
78 | Status = PcdSet64S (PcdSerialRegisterBase, SerialPortInfo->RegisterBase);\r |
79 | if (RETURN_ERROR (Status)) {\r | |
80 | return Status;\r | |
81 | }\r | |
e5efcf8b | 82 | \r |
422e5d2f GD |
83 | Status = PcdSet32S (PcdSerialRegisterStride, SerialPortInfo->RegisterStride);\r |
84 | if (RETURN_ERROR (Status)) {\r | |
85 | return Status;\r | |
86 | }\r | |
e5efcf8b | 87 | \r |
422e5d2f GD |
88 | Status = PcdSet32S (PcdSerialBaudRate, SerialPortInfo->BaudRate);\r |
89 | if (RETURN_ERROR (Status)) {\r | |
90 | return Status;\r | |
91 | }\r | |
04af8bf2 | 92 | \r |
422e5d2f | 93 | return RETURN_SUCCESS;\r |
04af8bf2 DG |
94 | }\r |
95 | \r | |
422e5d2f | 96 | return EFI_NOT_FOUND;\r |
04af8bf2 | 97 | }\r |