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316172ba | 1 | /** @file\r |
eceb3a4c | 2 | Null Serial Port library instance with empty functions.\r |
316172ba | 3 | \r |
eceb3a4c | 4 | Copyright (c) 2006 - 2008, Intel Corporation\r |
316172ba | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
316172ba | 13 | **/\r |
14 | \r | |
c892d846 | 15 | \r |
7f1c3191 | 16 | #include <Base.h>\r |
c892d846 | 17 | \r |
18 | \r | |
316172ba | 19 | #include <Library/SerialPortLib.h>\r |
20 | \r | |
eceb3a4c | 21 | /**\r |
316172ba | 22 | Programmed hardware of Serial port.\r |
23 | \r | |
eceb3a4c | 24 | @return Always return RETURN_UNSUPPORTED.\r |
316172ba | 25 | \r |
26 | **/\r | |
7f1c3191 | 27 | RETURN_STATUS\r |
316172ba | 28 | EFIAPI\r |
29 | SerialPortInitialize (\r | |
30 | VOID\r | |
31 | )\r | |
32 | {\r | |
7f1c3191 | 33 | return RETURN_UNSUPPORTED;\r |
316172ba | 34 | }\r |
35 | \r | |
36 | /**\r | |
37 | Write data to serial device.\r | |
38 | \r | |
39 | @param Buffer Point of data buffer which need to be writed.\r | |
40 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
41 | \r | |
eceb3a4c | 42 | @retval 0 No data is to be written.\r |
316172ba | 43 | \r |
44 | **/\r | |
45 | UINTN\r | |
46 | EFIAPI\r | |
47 | SerialPortWrite (\r | |
48 | IN UINT8 *Buffer,\r | |
49 | IN UINTN NumberOfBytes\r | |
50 | )\r | |
51 | {\r | |
52 | return 0;\r | |
53 | }\r | |
54 | \r | |
55 | \r | |
56 | /**\r | |
57 | Read data from serial device and save the datas in buffer.\r | |
58 | \r | |
6f5cf759 | 59 | @param Buffer Point of data buffer, which contains the data\r |
eceb3a4c LG |
60 | returned from the serial device.\r |
61 | @param NumberOfBytes Number of bytes which will be read.\r | |
316172ba | 62 | \r |
eceb3a4c | 63 | @retval 0 No data is to be read.\r |
316172ba | 64 | \r |
65 | **/\r | |
66 | UINTN\r | |
67 | EFIAPI\r | |
68 | SerialPortRead (\r | |
69 | OUT UINT8 *Buffer,\r | |
70 | IN UINTN NumberOfBytes\r | |
71 | )\r | |
72 | {\r | |
73 | return 0;\r | |
74 | }\r | |
75 | \r | |
a2ddd00b LG |
76 | /**\r |
77 | Poll the serial device to see if there is any data waiting.\r | |
78 | \r | |
79 | If there is data waiting to be read from the serial port, then return\r | |
6f5cf759 | 80 | TRUE. If there is no data waiting to be read from the serial port, then\r |
a2ddd00b LG |
81 | return FALSE.\r |
82 | \r | |
83 | @retval FALSE There is no data waiting to be read.\r | |
84 | \r | |
85 | **/\r | |
86 | BOOLEAN\r | |
87 | EFIAPI\r | |
88 | SerialPortPoll (\r | |
89 | VOID\r | |
90 | )\r | |
91 | {\r | |
6f5cf759 | 92 | return FALSE;\r |
93 | }\r | |
a2ddd00b | 94 | \r |