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1 | /** @file\r |
2 | Serial I/O Port library functions with base address discovered from FDT\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r | |
5 | Copyright (c) 2012 - 2013, ARM Ltd. All rights reserved.<BR>\r | |
6 | Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r | |
7 | Copyright (c) 2014, Red Hat, Inc.<BR>\r | |
8 | \r | |
9 | This program and the accompanying materials\r | |
10 | are licensed and made available under the terms and conditions of the BSD License\r | |
11 | which accompanies this distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include <Base.h>\r | |
20 | \r | |
21 | #include <Library/PcdLib.h>\r | |
22 | #include <Library/SerialPortLib.h>\r | |
23 | #include <Pi/PiBootMode.h>\r | |
24 | #include <Uefi/UefiBaseType.h>\r | |
25 | #include <Uefi/UefiMultiPhase.h>\r | |
26 | #include <Pi/PiHob.h>\r | |
27 | #include <Library/HobLib.h>\r | |
28 | #include <Guid/EarlyPL011BaseAddress.h>\r | |
29 | \r | |
30 | #include <Drivers/PL011Uart.h>\r | |
31 | \r | |
32 | STATIC UINTN mSerialBaseAddress;\r | |
33 | \r | |
34 | RETURN_STATUS\r | |
35 | EFIAPI\r | |
36 | SerialPortInitialize (\r | |
37 | VOID\r | |
38 | )\r | |
39 | {\r | |
40 | return RETURN_SUCCESS;\r | |
41 | }\r | |
42 | \r | |
43 | /**\r | |
44 | \r | |
45 | Program hardware of Serial port\r | |
46 | \r | |
47 | @return RETURN_NOT_FOUND if no PL011 base address could be found\r | |
48 | Otherwise, result of PL011UartInitializePort () is returned\r | |
49 | \r | |
50 | **/\r | |
51 | RETURN_STATUS\r | |
52 | EFIAPI\r | |
53 | FdtPL011SerialPortLibInitialize (\r | |
54 | VOID\r | |
55 | )\r | |
56 | {\r | |
57 | VOID *Hob;\r | |
58 | CONST UINT64 *UartBase;\r | |
59 | UINT64 BaudRate;\r | |
60 | UINT32 ReceiveFifoDepth;\r | |
61 | EFI_PARITY_TYPE Parity;\r | |
62 | UINT8 DataBits;\r | |
63 | EFI_STOP_BITS_TYPE StopBits;\r | |
64 | \r | |
65 | Hob = GetFirstGuidHob (&gEarlyPL011BaseAddressGuid);\r | |
66 | if (Hob == NULL || GET_GUID_HOB_DATA_SIZE (Hob) != sizeof *UartBase) {\r | |
67 | return RETURN_NOT_FOUND;\r | |
68 | }\r | |
69 | UartBase = GET_GUID_HOB_DATA (Hob);\r | |
70 | \r | |
71 | mSerialBaseAddress = (UINTN)*UartBase;\r | |
72 | if (mSerialBaseAddress == 0) {\r | |
73 | return RETURN_NOT_FOUND;\r | |
74 | }\r | |
75 | \r | |
76 | BaudRate = (UINTN)PcdGet64 (PcdUartDefaultBaudRate);\r | |
77 | ReceiveFifoDepth = 0; // Use the default value for Fifo depth\r | |
78 | Parity = (EFI_PARITY_TYPE)PcdGet8 (PcdUartDefaultParity);\r | |
79 | DataBits = PcdGet8 (PcdUartDefaultDataBits);\r | |
80 | StopBits = (EFI_STOP_BITS_TYPE) PcdGet8 (PcdUartDefaultStopBits);\r | |
81 | \r | |
82 | return PL011UartInitializePort (\r | |
83 | mSerialBaseAddress, &BaudRate, &ReceiveFifoDepth,\r | |
84 | &Parity, &DataBits, &StopBits);\r | |
85 | }\r | |
86 | \r | |
87 | /**\r | |
88 | Write data to serial device.\r | |
89 | \r | |
90 | @param Buffer Point of data buffer which need to be written.\r | |
91 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
92 | \r | |
93 | @retval 0 Write data failed.\r | |
94 | @retval !0 Actual number of bytes written to serial device.\r | |
95 | \r | |
96 | **/\r | |
97 | UINTN\r | |
98 | EFIAPI\r | |
99 | SerialPortWrite (\r | |
100 | IN UINT8 *Buffer,\r | |
101 | IN UINTN NumberOfBytes\r | |
102 | )\r | |
103 | {\r | |
104 | if (mSerialBaseAddress != 0) {\r | |
105 | return PL011UartWrite (mSerialBaseAddress, Buffer, NumberOfBytes);\r | |
106 | }\r | |
107 | return 0;\r | |
108 | }\r | |
109 | \r | |
110 | /**\r | |
111 | Read data from serial device and save the data in buffer.\r | |
112 | \r | |
113 | @param Buffer Point of data buffer which need to be written.\r | |
114 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
115 | \r | |
116 | @retval 0 Read data failed.\r | |
117 | @retval !0 Actual number of bytes read from serial device.\r | |
118 | \r | |
119 | **/\r | |
120 | UINTN\r | |
121 | EFIAPI\r | |
122 | SerialPortRead (\r | |
123 | OUT UINT8 *Buffer,\r | |
124 | IN UINTN NumberOfBytes\r | |
125 | )\r | |
126 | {\r | |
127 | if (mSerialBaseAddress != 0) {\r | |
128 | return PL011UartRead (mSerialBaseAddress, Buffer, NumberOfBytes);\r | |
129 | }\r | |
130 | return 0;\r | |
131 | }\r | |
132 | \r | |
133 | /**\r | |
134 | Check to see if any data is available to be read from the debug device.\r | |
135 | \r | |
136 | @retval TRUE At least one byte of data is available to be read\r | |
137 | @retval FALSE No data is available to be read\r | |
138 | \r | |
139 | **/\r | |
140 | BOOLEAN\r | |
141 | EFIAPI\r | |
142 | SerialPortPoll (\r | |
143 | VOID\r | |
144 | )\r | |
145 | {\r | |
146 | if (mSerialBaseAddress != 0) {\r | |
147 | return PL011UartPoll (mSerialBaseAddress);\r | |
148 | }\r | |
149 | return FALSE;\r | |
150 | }\r |