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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 | |
7e284acb | 11 | #include <PiDxe.h>\r |
12 | #include <Library/SerialPortLib.h>\r | |
13 | #include <Library/EmuThunkLib.h>\r | |
14 | \r | |
7e284acb | 15 | /**\r |
16 | Initialize the serial device hardware.\r | |
d18d8a1d | 17 | \r |
7e284acb | 18 | If no initialization is required, then return RETURN_SUCCESS.\r |
19 | If the serial device was successfully initialized, then return RETURN_SUCCESS.\r | |
20 | If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.\r | |
d18d8a1d | 21 | \r |
7e284acb | 22 | @retval RETURN_SUCCESS The serial device was initialized.\r |
23 | @retval RETURN_DEVICE_ERROR The serial device could not be initialized.\r | |
24 | \r | |
25 | **/\r | |
26 | RETURN_STATUS\r | |
27 | EFIAPI\r | |
28 | SerialPortInitialize (\r | |
29 | VOID\r | |
30 | )\r | |
31 | {\r | |
32 | return RETURN_SUCCESS;\r | |
33 | }\r | |
34 | \r | |
35 | /**\r | |
d18d8a1d | 36 | Write data from buffer to serial device.\r |
37 | \r | |
38 | Writes NumberOfBytes data bytes from Buffer to the serial device.\r | |
7e284acb | 39 | The number of bytes actually written to the serial device is returned.\r |
40 | If the return value is less than NumberOfBytes, then the write operation failed.\r | |
d18d8a1d | 41 | If Buffer is NULL, then ASSERT().\r |
7e284acb | 42 | If NumberOfBytes is zero, then return 0.\r |
43 | \r | |
44 | @param Buffer The pointer to the data buffer to be written.\r | |
45 | @param NumberOfBytes The number of bytes to written to the serial device.\r | |
46 | \r | |
47 | @retval 0 NumberOfBytes is 0.\r | |
d18d8a1d | 48 | @retval >0 The number of bytes written to the serial device.\r |
7e284acb | 49 | If this value is less than NumberOfBytes, then the read operation failed.\r |
50 | \r | |
51 | **/\r | |
52 | UINTN\r | |
53 | EFIAPI\r | |
54 | SerialPortWrite (\r | |
a550d468 MK |
55 | IN UINT8 *Buffer,\r |
56 | IN UINTN NumberOfBytes\r | |
7e284acb | 57 | )\r |
58 | {\r | |
9184d5da | 59 | if (gEmuThunk == NULL) {\r |
60 | return NumberOfBytes;\r | |
61 | }\r | |
79e4f2a5 | 62 | \r |
7e284acb | 63 | return gEmuThunk->WriteStdErr (Buffer, NumberOfBytes);\r |
64 | }\r | |
65 | \r | |
7e284acb | 66 | /**\r |
67 | Read data from serial device and save the datas in buffer.\r | |
d18d8a1d | 68 | \r |
7e284acb | 69 | Reads NumberOfBytes data bytes from a serial device into the buffer\r |
d18d8a1d | 70 | specified by Buffer. The number of bytes actually read is returned.\r |
7e284acb | 71 | If the return value is less than NumberOfBytes, then the rest operation failed.\r |
d18d8a1d | 72 | If Buffer is NULL, then ASSERT().\r |
7e284acb | 73 | If NumberOfBytes is zero, then return 0.\r |
74 | \r | |
75 | @param Buffer The pointer to the data buffer to store the data read from the serial device.\r | |
76 | @param NumberOfBytes The number of bytes which will be read.\r | |
77 | \r | |
78 | @retval 0 Read data failed; No data is to be read.\r | |
79 | @retval >0 The actual number of bytes read from serial device.\r | |
80 | \r | |
81 | **/\r | |
82 | UINTN\r | |
83 | EFIAPI\r | |
84 | SerialPortRead (\r | |
a550d468 MK |
85 | OUT UINT8 *Buffer,\r |
86 | IN UINTN NumberOfBytes\r | |
7e284acb | 87 | )\r |
88 | {\r | |
89 | return 0;\r | |
90 | }\r | |
91 | \r | |
92 | /**\r | |
93 | Polls a serial device to see if there is any data waiting to be read.\r | |
94 | \r | |
95 | Polls a serial device to see if there is any data waiting to be read.\r | |
96 | If there is data waiting to be read from the serial device, then TRUE is returned.\r | |
97 | If there is no data waiting to be read from the serial device, then FALSE is returned.\r | |
98 | \r | |
99 | @retval TRUE Data is waiting to be read from the serial device.\r | |
100 | @retval FALSE There is no data waiting to be read from the serial device.\r | |
101 | \r | |
102 | **/\r | |
103 | BOOLEAN\r | |
104 | EFIAPI\r | |
105 | SerialPortPoll (\r | |
106 | VOID\r | |
107 | )\r | |
108 | {\r | |
109 | return FALSE;\r | |
110 | }\r |