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1 | /** @file\r | |
2 | This library class provides common serial I/O port functions.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2012 - 2014, ARM Ltd. All rights reserved.\r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | \r | |
8 | **/\r | |
9 | \r | |
10 | #ifndef __SERIAL_PORT_LIB__\r | |
11 | #define __SERIAL_PORT_LIB__\r | |
12 | \r | |
13 | #include <Uefi/UefiBaseType.h>\r | |
14 | #include <Protocol/SerialIo.h>\r | |
15 | \r | |
16 | /**\r | |
17 | Initialize the serial device hardware.\r | |
18 | \r | |
19 | If no initialization is required, then return RETURN_SUCCESS.\r | |
20 | If the serial device was successfully initialized, then return RETURN_SUCCESS.\r | |
21 | If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.\r | |
22 | \r | |
23 | @retval RETURN_SUCCESS The serial device was initialized.\r | |
24 | @retval RETURN_DEVICE_ERROR The serial device could not be initialized.\r | |
25 | \r | |
26 | **/\r | |
27 | RETURN_STATUS\r | |
28 | EFIAPI\r | |
29 | SerialPortInitialize (\r | |
30 | VOID\r | |
31 | );\r | |
32 | \r | |
33 | /**\r | |
34 | Write data from buffer to serial device.\r | |
35 | \r | |
36 | Writes NumberOfBytes data bytes from Buffer to the serial device.\r | |
37 | The number of bytes actually written to the serial device is returned.\r | |
38 | If the return value is less than NumberOfBytes, then the write operation failed.\r | |
39 | If Buffer is NULL, then ASSERT().\r | |
40 | If NumberOfBytes is zero, then return 0.\r | |
41 | \r | |
42 | @param Buffer Pointer to the data buffer to be written.\r | |
43 | @param NumberOfBytes Number of bytes to written to the serial device.\r | |
44 | \r | |
45 | @retval 0 NumberOfBytes is 0.\r | |
46 | @retval >0 The number of bytes written to the serial device.\r | |
47 | If this value is less than NumberOfBytes, then the write operation failed.\r | |
48 | \r | |
49 | **/\r | |
50 | UINTN\r | |
51 | EFIAPI\r | |
52 | SerialPortWrite (\r | |
53 | IN UINT8 *Buffer,\r | |
54 | IN UINTN NumberOfBytes\r | |
55 | );\r | |
56 | \r | |
57 | \r | |
58 | /**\r | |
59 | Read data from serial device and save the datas in buffer.\r | |
60 | \r | |
61 | Reads NumberOfBytes data bytes from a serial device into the buffer\r | |
62 | specified by Buffer. The number of bytes actually read is returned.\r | |
63 | If the return value is less than NumberOfBytes, then the rest operation failed.\r | |
64 | If Buffer is NULL, then ASSERT().\r | |
65 | If NumberOfBytes is zero, then return 0.\r | |
66 | \r | |
67 | @param Buffer Pointer to the data buffer to store the data read from the serial device.\r | |
68 | @param NumberOfBytes Number of bytes which will be read.\r | |
69 | \r | |
70 | @retval 0 Read data failed, no data is to be read.\r | |
71 | @retval >0 Actual number of bytes read from serial device.\r | |
72 | \r | |
73 | **/\r | |
74 | UINTN\r | |
75 | EFIAPI\r | |
76 | SerialPortRead (\r | |
77 | OUT UINT8 *Buffer,\r | |
78 | IN UINTN NumberOfBytes\r | |
79 | );\r | |
80 | \r | |
81 | /**\r | |
82 | Polls a serial device to see if there is any data waiting to be read.\r | |
83 | \r | |
84 | Polls a serial device to see if there is any data waiting to be read.\r | |
85 | If there is data waiting to be read from the serial device, then TRUE is returned.\r | |
86 | If there is no data waiting to be read from the serial device, then FALSE is returned.\r | |
87 | \r | |
88 | @retval TRUE Data is waiting to be read from the serial device.\r | |
89 | @retval FALSE There is no data waiting to be read from the serial device.\r | |
90 | \r | |
91 | **/\r | |
92 | BOOLEAN\r | |
93 | EFIAPI\r | |
94 | SerialPortPoll (\r | |
95 | VOID\r | |
96 | );\r | |
97 | \r | |
98 | /**\r | |
99 | Sets the control bits on a serial device.\r | |
100 | \r | |
101 | @param Control Sets the bits of Control that are settable.\r | |
102 | \r | |
103 | @retval RETURN_SUCCESS The new control bits were set on the serial device.\r | |
104 | @retval RETURN_UNSUPPORTED The serial device does not support this operation.\r | |
105 | @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.\r | |
106 | \r | |
107 | **/\r | |
108 | RETURN_STATUS\r | |
109 | EFIAPI\r | |
110 | SerialPortSetControl (\r | |
111 | IN UINT32 Control\r | |
112 | );\r | |
113 | \r | |
114 | /**\r | |
115 | Retrieve the status of the control bits on a serial device.\r | |
116 | \r | |
117 | @param Control A pointer to return the current control signals from the serial device.\r | |
118 | \r | |
119 | @retval RETURN_SUCCESS The control bits were read from the serial device.\r | |
120 | @retval RETURN_UNSUPPORTED The serial device does not support this operation.\r | |
121 | @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.\r | |
122 | \r | |
123 | **/\r | |
124 | RETURN_STATUS\r | |
125 | EFIAPI\r | |
126 | SerialPortGetControl (\r | |
127 | OUT UINT32 *Control\r | |
128 | );\r | |
129 | \r | |
130 | /**\r | |
131 | Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,\r | |
132 | data bits, and stop bits on a serial device.\r | |
133 | \r | |
134 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the\r | |
135 | device's default interface speed.\r | |
136 | On output, the value actually set.\r | |
137 | @param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
138 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
139 | the device's default FIFO depth.\r | |
140 | On output, the value actually set.\r | |
141 | @param Timeout The requested time out for a single character in microseconds.\r | |
142 | This timeout applies to both the transmit and receive side of the\r | |
143 | interface. A Timeout value of 0 will use the device's default time\r | |
144 | out value.\r | |
145 | On output, the value actually set.\r | |
146 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
147 | DefaultParity will use the device's default parity value.\r | |
148 | On output, the value actually set.\r | |
149 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
150 | vaule of 0 will use the device's default data bit setting.\r | |
151 | On output, the value actually set.\r | |
152 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
153 | value of DefaultStopBits will use the device's default number of\r | |
154 | stop bits.\r | |
155 | On output, the value actually set.\r | |
156 | \r | |
157 | @retval RETURN_SUCCESS The new attributes were set on the serial device.\r | |
158 | @retval RETURN_UNSUPPORTED The serial device does not support this operation.\r | |
159 | @retval RETURN_INVALID_PARAMETER One or more of the attributes has an unsupported value.\r | |
160 | @retval RETURN_DEVICE_ERROR The serial device is not functioning correctly.\r | |
161 | \r | |
162 | **/\r | |
163 | RETURN_STATUS\r | |
164 | EFIAPI\r | |
165 | SerialPortSetAttributes (\r | |
166 | IN OUT UINT64 *BaudRate,\r | |
167 | IN OUT UINT32 *ReceiveFifoDepth,\r | |
168 | IN OUT UINT32 *Timeout,\r | |
169 | IN OUT EFI_PARITY_TYPE *Parity,\r | |
170 | IN OUT UINT8 *DataBits,\r | |
171 | IN OUT EFI_STOP_BITS_TYPE *StopBits\r | |
172 | );\r | |
173 | \r | |
174 | #endif\r |