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Commit | Line | Data |
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7e284acb | 1 | /** @file\r |
d18d8a1d | 2 | Serial Port Lib that thunks back to Emulator services to write to StdErr.\r |
3 | All read functions are stubed out.\r | |
7e284acb | 4 | \r |
5 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
6 | Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>\r | |
e3ba31da | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
7e284acb | 8 | \r |
9 | **/\r | |
10 | \r | |
11 | \r | |
12 | #include <PiDxe.h>\r | |
13 | #include <Library/SerialPortLib.h>\r | |
14 | #include <Library/EmuThunkLib.h>\r | |
15 | \r | |
16 | \r | |
17 | \r | |
18 | \r | |
19 | /**\r | |
20 | Initialize the serial device hardware.\r | |
d18d8a1d | 21 | \r |
7e284acb | 22 | If no initialization is required, then return RETURN_SUCCESS.\r |
23 | If the serial device was successfully initialized, then return RETURN_SUCCESS.\r | |
24 | If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.\r | |
d18d8a1d | 25 | \r |
7e284acb | 26 | @retval RETURN_SUCCESS The serial device was initialized.\r |
27 | @retval RETURN_DEVICE_ERROR The serial device could not be initialized.\r | |
28 | \r | |
29 | **/\r | |
30 | RETURN_STATUS\r | |
31 | EFIAPI\r | |
32 | SerialPortInitialize (\r | |
33 | VOID\r | |
34 | )\r | |
35 | {\r | |
36 | return RETURN_SUCCESS;\r | |
37 | }\r | |
38 | \r | |
39 | /**\r | |
d18d8a1d | 40 | Write data from buffer to serial device.\r |
41 | \r | |
42 | Writes NumberOfBytes data bytes from Buffer to the serial device.\r | |
7e284acb | 43 | The number of bytes actually written to the serial device is returned.\r |
44 | If the return value is less than NumberOfBytes, then the write operation failed.\r | |
d18d8a1d | 45 | If Buffer is NULL, then ASSERT().\r |
7e284acb | 46 | If NumberOfBytes is zero, then return 0.\r |
47 | \r | |
48 | @param Buffer The pointer to the data buffer to be written.\r | |
49 | @param NumberOfBytes The number of bytes to written to the serial device.\r | |
50 | \r | |
51 | @retval 0 NumberOfBytes is 0.\r | |
d18d8a1d | 52 | @retval >0 The number of bytes written to the serial device.\r |
7e284acb | 53 | If this value is less than NumberOfBytes, then the read operation failed.\r |
54 | \r | |
55 | **/\r | |
56 | UINTN\r | |
57 | EFIAPI\r | |
58 | SerialPortWrite (\r | |
59 | IN UINT8 *Buffer,\r | |
60 | IN UINTN NumberOfBytes\r | |
61 | )\r | |
62 | {\r | |
9184d5da | 63 | if (gEmuThunk == NULL) {\r |
64 | return NumberOfBytes;\r | |
65 | }\r | |
79e4f2a5 | 66 | \r |
7e284acb | 67 | return gEmuThunk->WriteStdErr (Buffer, NumberOfBytes);\r |
68 | }\r | |
69 | \r | |
70 | \r | |
71 | /**\r | |
72 | Read data from serial device and save the datas in buffer.\r | |
d18d8a1d | 73 | \r |
7e284acb | 74 | Reads NumberOfBytes data bytes from a serial device into the buffer\r |
d18d8a1d | 75 | specified by Buffer. The number of bytes actually read is returned.\r |
7e284acb | 76 | If the return value is less than NumberOfBytes, then the rest operation failed.\r |
d18d8a1d | 77 | If Buffer is NULL, then ASSERT().\r |
7e284acb | 78 | If NumberOfBytes is zero, then return 0.\r |
79 | \r | |
80 | @param Buffer The pointer to the data buffer to store the data read from the serial device.\r | |
81 | @param NumberOfBytes The number of bytes which will be read.\r | |
82 | \r | |
83 | @retval 0 Read data failed; No data is to be read.\r | |
84 | @retval >0 The actual number of bytes read from serial device.\r | |
85 | \r | |
86 | **/\r | |
87 | UINTN\r | |
88 | EFIAPI\r | |
89 | SerialPortRead (\r | |
90 | OUT UINT8 *Buffer,\r | |
91 | IN UINTN NumberOfBytes\r | |
92 | )\r | |
93 | {\r | |
94 | return 0;\r | |
95 | }\r | |
96 | \r | |
97 | /**\r | |
98 | Polls a serial device to see if there is any data waiting to be read.\r | |
99 | \r | |
100 | Polls a serial device to see if there is any data waiting to be read.\r | |
101 | If there is data waiting to be read from the serial device, then TRUE is returned.\r | |
102 | If there is no data waiting to be read from the serial device, then FALSE is returned.\r | |
103 | \r | |
104 | @retval TRUE Data is waiting to be read from the serial device.\r | |
105 | @retval FALSE There is no data waiting to be read from the serial device.\r | |
106 | \r | |
107 | **/\r | |
108 | BOOLEAN\r | |
109 | EFIAPI\r | |
110 | SerialPortPoll (\r | |
111 | VOID\r | |
112 | )\r | |
113 | {\r | |
114 | return FALSE;\r | |
115 | }\r | |
116 | \r | |
117 | \r |