]>
Commit | Line | Data |
---|---|---|
1fde2f61 | 1 | /** @file\r |
2 | Serial I/O Port library functions with no library constructor/destructor\r | |
3 | \r | |
4 | \r | |
cf748a1a | 5 | Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r |
1fde2f61 | 6 | \r |
cf748a1a | 7 | This program and the accompanying materials\r |
1fde2f61 | 8 | are licensed and made available under the terms and conditions of the BSD License\r |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <Base.h>\r | |
1fde2f61 | 18 | #include <Library/SerialPortLib.h>\r |
19 | #include <Library/PcdLib.h>\r | |
20 | #include <Library/IoLib.h>\r | |
b76848cb | 21 | \r |
22 | #include <ArmEb/ArmEb.h>\r | |
1fde2f61 | 23 | \r |
24 | /*\r | |
25 | \r | |
26 | Programmed hardware of Serial port.\r | |
27 | \r | |
28 | @return Always return EFI_UNSUPPORTED.\r | |
29 | \r | |
30 | **/\r | |
31 | RETURN_STATUS\r | |
32 | EFIAPI\r | |
33 | SerialPortInitialize (\r | |
34 | VOID\r | |
35 | )\r | |
36 | {\r | |
ebeffc42 | 37 | UINT32 Base = PcdGet32 (PcdConsoleUartBase);\r |
1fde2f61 | 38 | \r |
39 | // initialize baud rate generator to 115200 based on EB clock REFCLK24MHZ\r | |
40 | MmioWrite32 (Base + UARTIBRD, UART_115200_IDIV);\r | |
41 | MmioWrite32 (Base + UARTFBRD, UART_115200_FDIV);\r | |
42 | \r | |
43 | // no parity, 1 stop, no fifo, 8 data bits\r | |
44 | MmioWrite32 (Base + UARTLCR_H, 0x60);\r | |
45 | \r | |
46 | // clear any pending errors\r | |
47 | MmioWrite32 (Base + UARTECR, 0);\r | |
48 | \r | |
49 | // enable tx, rx, and uart overall\r | |
50 | MmioWrite32 (Base + UARTCR, 0x301);\r | |
51 | \r | |
52 | return RETURN_SUCCESS;\r | |
53 | }\r | |
54 | \r | |
55 | /**\r | |
56 | Write data to serial device.\r | |
57 | \r | |
58 | @param Buffer Point of data buffer which need to be writed.\r | |
59 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
60 | \r | |
61 | @retval 0 Write data failed.\r | |
62 | @retval !0 Actual number of bytes writed to serial device.\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 | |
ebeffc42 | 72 | UINT32 FR = PcdGet32 (PcdConsoleUartBase) + UARTFR;\r |
73 | UINT32 DR = PcdGet32 (PcdConsoleUartBase) + UARTDR;\r | |
1fde2f61 | 74 | UINTN Count;\r |
75 | \r | |
76 | for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r | |
77 | while ((MmioRead32 (FR) & UART_TX_EMPTY_FLAG_MASK) != 0);\r | |
78 | MmioWrite8 (DR, *Buffer);\r | |
79 | }\r | |
80 | \r | |
81 | return NumberOfBytes;\r | |
82 | }\r | |
83 | \r | |
84 | \r | |
85 | /**\r | |
86 | Read data from serial device and save the datas in buffer.\r | |
87 | \r | |
88 | @param Buffer Point of data buffer which need to be writed.\r | |
89 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
90 | \r | |
91 | @retval 0 Read data failed.\r | |
92 | @retval !0 Aactual number of bytes read from serial device.\r | |
93 | \r | |
94 | **/\r | |
95 | UINTN\r | |
96 | EFIAPI\r | |
97 | SerialPortRead (\r | |
98 | OUT UINT8 *Buffer,\r | |
99 | IN UINTN NumberOfBytes\r | |
100 | )\r | |
101 | {\r | |
ebeffc42 | 102 | UINT32 FR = PcdGet32 (PcdConsoleUartBase) + UARTFR;\r |
103 | UINT32 DR = PcdGet32 (PcdConsoleUartBase) + UARTDR;\r | |
1fde2f61 | 104 | UINTN Count;\r |
105 | \r | |
106 | for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r | |
107 | while ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0);\r | |
108 | *Buffer = MmioRead8 (DR);\r | |
109 | }\r | |
110 | \r | |
111 | return NumberOfBytes;\r | |
112 | }\r | |
113 | \r | |
114 | \r | |
115 | /**\r | |
116 | Check to see if any data is avaiable to be read from the debug device.\r | |
117 | \r | |
118 | @retval EFI_SUCCESS At least one byte of data is avaiable to be read\r | |
119 | @retval EFI_NOT_READY No data is avaiable to be read\r | |
120 | @retval EFI_DEVICE_ERROR The serial device is not functioning properly\r | |
121 | \r | |
122 | **/\r | |
123 | BOOLEAN\r | |
124 | EFIAPI\r | |
125 | SerialPortPoll (\r | |
126 | VOID\r | |
127 | )\r | |
128 | {\r | |
ebeffc42 | 129 | UINT32 FR = PcdGet32 (PcdConsoleUartBase) + UARTFR;\r |
1fde2f61 | 130 | \r |
131 | if ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0) {\r | |
132 | return TRUE;\r | |
133 | } else {\r | |
134 | return FALSE;\r | |
135 | }\r | |
136 | }\r | |
137 | \r |