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2ef2b01e A |
1 | /** @file\r |
2 | Serial I/O Port library functions with no library constructor/destructor\r | |
3 | \r | |
d6ebcab7 | 4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
3402aac7 | 5 | \r |
d6ebcab7 | 6 | This program and the accompanying materials\r |
2ef2b01e A |
7 | are licensed and made available under the terms and conditions of the BSD License\r |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Uefi.h>\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/SemihostLib.h>\r | |
19 | #include <Library/SerialPortLib.h>\r | |
20 | \r | |
21 | \r | |
22 | /*\r | |
23 | \r | |
24 | Programmed hardware of Serial port.\r | |
25 | \r | |
26 | @return Always return EFI_UNSUPPORTED.\r | |
27 | \r | |
28 | **/\r | |
29 | RETURN_STATUS\r | |
30 | EFIAPI\r | |
31 | SerialPortInitialize (\r | |
32 | VOID\r | |
33 | )\r | |
34 | {\r | |
35 | if (SemihostConnectionSupported ()) {\r | |
36 | return RETURN_SUCCESS;\r | |
37 | } else {\r | |
38 | return RETURN_UNSUPPORTED;\r | |
39 | }\r | |
40 | }\r | |
41 | \r | |
42 | /**\r | |
43 | Write data to serial device.\r | |
44 | \r | |
45 | @param Buffer Point of data buffer which need to be writed.\r | |
46 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
47 | \r | |
48 | @retval 0 Write data failed.\r | |
49 | @retval !0 Actual number of bytes writed to serial device.\r | |
50 | \r | |
51 | **/\r | |
52 | \r | |
53 | #define PRINT_BUFFER_SIZE 512\r | |
54 | #define PRINT_BUFFER_THRESHOLD (PRINT_BUFFER_SIZE - 4)\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 | |
63 | UINT8 PrintBuffer[PRINT_BUFFER_SIZE];\r | |
64 | UINTN SourceIndex = 0;\r | |
65 | UINTN DestinationIndex = 0;\r | |
66 | UINT8 CurrentCharacter;\r | |
67 | \r | |
68 | while (SourceIndex < NumberOfBytes)\r | |
69 | {\r | |
70 | CurrentCharacter = Buffer[SourceIndex++];\r | |
3402aac7 | 71 | \r |
2ef2b01e A |
72 | switch (CurrentCharacter)\r |
73 | {\r | |
74 | case '\r':\r | |
75 | continue;\r | |
76 | \r | |
77 | case '\n':\r | |
78 | PrintBuffer[DestinationIndex++] = ' ';\r | |
79 | // fall through\r | |
80 | \r | |
81 | default:\r | |
82 | PrintBuffer[DestinationIndex++] = CurrentCharacter;\r | |
83 | break;\r | |
84 | }\r | |
85 | \r | |
86 | if (DestinationIndex > PRINT_BUFFER_THRESHOLD)\r | |
87 | {\r | |
88 | PrintBuffer[DestinationIndex] = '\0';\r | |
89 | SemihostWriteString ((CHAR8 *) PrintBuffer);\r | |
90 | \r | |
91 | DestinationIndex = 0;\r | |
92 | }\r | |
93 | }\r | |
3402aac7 | 94 | \r |
2ef2b01e A |
95 | if (DestinationIndex > 0)\r |
96 | {\r | |
97 | PrintBuffer[DestinationIndex] = '\0';\r | |
98 | SemihostWriteString ((CHAR8 *) PrintBuffer);\r | |
99 | }\r | |
100 | \r | |
5f4f1334 | 101 | return NumberOfBytes;\r |
2ef2b01e A |
102 | }\r |
103 | \r | |
104 | \r | |
105 | /**\r | |
106 | Read data from serial device and save the datas in buffer.\r | |
107 | \r | |
108 | @param Buffer Point of data buffer which need to be writed.\r | |
109 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
110 | \r | |
111 | @retval 0 Read data failed.\r | |
112 | @retval !0 Aactual number of bytes read from serial device.\r | |
113 | \r | |
114 | **/\r | |
115 | UINTN\r | |
116 | EFIAPI\r | |
117 | SerialPortRead (\r | |
118 | OUT UINT8 *Buffer,\r | |
119 | IN UINTN NumberOfBytes\r | |
120 | )\r | |
121 | {\r | |
122 | *Buffer = SemihostReadCharacter ();\r | |
123 | return 1;\r | |
124 | }\r | |
125 | \r | |
126 | \r | |
127 | \r | |
128 | /**\r | |
129 | Check to see if any data is avaiable to be read from the debug device.\r | |
130 | \r | |
131 | @retval TRUE At least one byte of data is avaiable to be read\r | |
225290eb | 132 | @retval FALSE No data is avaiable to be read\r |
2ef2b01e A |
133 | \r |
134 | **/\r | |
135 | BOOLEAN\r | |
136 | EFIAPI\r | |
137 | SerialPortPoll (\r | |
138 | VOID\r | |
139 | )\r | |
140 | {\r | |
141 | // Since SemiHosting read character is blocking always say we have a char ready?\r | |
142 | return SemihostConnectionSupported ();\r | |
143 | }\r | |
144 | \r |