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949f388f | 1 | /** @file\r |
2 | Serial Port Lib that thunks back to Emulator services to write to StdErr. \r | |
3 | All read functions are stubed out. There is no constructor so this lib can \r | |
4 | be linked with PEI Core.\r | |
5 | \r | |
6 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
7 | Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>\r | |
8 | This program and the accompanying materials\r | |
9 | are licensed and made available under the terms and conditions of the BSD License\r | |
10 | which accompanies this distribution. The full text of the license may be found at\r | |
11 | http://opensource.org/licenses/bsd-license.php.\r | |
12 | \r | |
13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
15 | \r | |
16 | **/\r | |
17 | \r | |
18 | \r | |
19 | #include <PiPei.h>\r | |
20 | #include <Library/SerialPortLib.h>\r | |
21 | #include <Library/PeiServicesLib.h>\r | |
22 | \r | |
23 | #include <Ppi/EmuThunk.h>\r | |
24 | #include <Protocol/EmuThunk.h>\r | |
25 | \r | |
26 | \r | |
27 | \r | |
28 | /**\r | |
29 | Initialize the serial device hardware.\r | |
30 | \r | |
31 | If no initialization is required, then return RETURN_SUCCESS.\r | |
32 | If the serial device was successfully initialized, then return RETURN_SUCCESS.\r | |
33 | If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.\r | |
34 | \r | |
35 | @retval RETURN_SUCCESS The serial device was initialized.\r | |
36 | @retval RETURN_DEVICE_ERROR The serial device could not be initialized.\r | |
37 | \r | |
38 | **/\r | |
39 | RETURN_STATUS\r | |
40 | EFIAPI\r | |
41 | SerialPortInitialize (\r | |
42 | VOID\r | |
43 | )\r | |
44 | {\r | |
45 | return RETURN_SUCCESS;\r | |
46 | }\r | |
47 | \r | |
48 | /**\r | |
49 | Write data from buffer to serial device. \r | |
50 | \r | |
51 | Writes NumberOfBytes data bytes from Buffer to the serial device. \r | |
52 | The number of bytes actually written to the serial device is returned.\r | |
53 | If the return value is less than NumberOfBytes, then the write operation failed.\r | |
54 | If Buffer is NULL, then ASSERT(). \r | |
55 | If NumberOfBytes is zero, then return 0.\r | |
56 | \r | |
57 | @param Buffer The pointer to the data buffer to be written.\r | |
58 | @param NumberOfBytes The number of bytes to written to the serial device.\r | |
59 | \r | |
60 | @retval 0 NumberOfBytes is 0.\r | |
61 | @retval >0 The number of bytes written to the serial device. \r | |
62 | If this value is less than NumberOfBytes, then the read operation failed.\r | |
63 | \r | |
64 | **/\r | |
65 | UINTN\r | |
66 | EFIAPI\r | |
67 | SerialPortWrite (\r | |
68 | IN UINT8 *Buffer,\r | |
69 | IN UINTN NumberOfBytes\r | |
70 | )\r | |
71 | {\r | |
72 | EMU_THUNK_PPI *ThunkPpi;\r | |
73 | EFI_STATUS Status;\r | |
74 | EMU_THUNK_PROTOCOL *Thunk;\r | |
75 | \r | |
76 | //\r | |
77 | // Locate EmuThunkPpi for retrieving standard output handle\r | |
78 | //\r | |
79 | Status = PeiServicesLocatePpi (\r | |
80 | &gEmuThunkPpiGuid,\r | |
81 | 0,\r | |
82 | NULL,\r | |
83 | (VOID **) &ThunkPpi\r | |
84 | );\r | |
85 | if (!EFI_ERROR (Status)) {\r | |
86 | Thunk = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();\r | |
87 | return Thunk->WriteStdErr (Buffer, NumberOfBytes);\r | |
88 | }\r | |
89 | \r | |
90 | return 0;\r | |
91 | }\r | |
92 | \r | |
93 | \r | |
94 | /**\r | |
95 | Read data from serial device and save the datas in buffer.\r | |
96 | \r | |
97 | Reads NumberOfBytes data bytes from a serial device into the buffer\r | |
98 | specified by Buffer. The number of bytes actually read is returned. \r | |
99 | If the return value is less than NumberOfBytes, then the rest operation failed.\r | |
100 | If Buffer is NULL, then ASSERT(). \r | |
101 | If NumberOfBytes is zero, then return 0.\r | |
102 | \r | |
103 | @param Buffer The pointer to the data buffer to store the data read from the serial device.\r | |
104 | @param NumberOfBytes The number of bytes which will be read.\r | |
105 | \r | |
106 | @retval 0 Read data failed; No data is to be read.\r | |
107 | @retval >0 The actual number of bytes read from serial device.\r | |
108 | \r | |
109 | **/\r | |
110 | UINTN\r | |
111 | EFIAPI\r | |
112 | SerialPortRead (\r | |
113 | OUT UINT8 *Buffer,\r | |
114 | IN UINTN NumberOfBytes\r | |
115 | )\r | |
116 | {\r | |
117 | return 0;\r | |
118 | }\r | |
119 | \r | |
120 | /**\r | |
121 | Polls a serial device to see if there is any data waiting to be read.\r | |
122 | \r | |
123 | Polls a serial device to see if there is any data waiting to be read.\r | |
124 | If there is data waiting to be read from the serial device, then TRUE is returned.\r | |
125 | If there is no data waiting to be read from the serial device, then FALSE is returned.\r | |
126 | \r | |
127 | @retval TRUE Data is waiting to be read from the serial device.\r | |
128 | @retval FALSE There is no data waiting to be read from the serial device.\r | |
129 | \r | |
130 | **/\r | |
131 | BOOLEAN\r | |
132 | EFIAPI\r | |
133 | SerialPortPoll (\r | |
134 | VOID\r | |
135 | )\r | |
136 | {\r | |
137 | return FALSE;\r | |
138 | }\r | |
139 | \r | |
140 | \r |