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1 | /** @file\r |
2 | *\r | |
3 | * Copyright (c) 2011-2016, ARM Limited. All rights reserved.\r | |
4 | *\r | |
5 | * 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 | |
13 | **/\r | |
14 | \r | |
15 | #ifndef __PL011_UART_LIB_H__\r | |
16 | #define __PL011_UART_LIB_H__\r | |
17 | \r | |
18 | #include <Uefi/UefiBaseType.h>\r | |
19 | \r | |
20 | #include <Protocol/SerialIo.h>\r | |
21 | \r | |
22 | /**\r | |
23 | \r | |
24 | Initialise the serial port to the specified settings.\r | |
25 | All unspecified settings will be set to the default values.\r | |
26 | \r | |
27 | @param[in] UartBase The base address of the serial device.\r | |
28 | @param[in] UartClkInHz The clock in Hz for the serial device.\r | |
29 | Ignored if the PCD PL011UartInteger is not 0\r | |
30 | @param[in out] BaudRate The baud rate of the serial device. If the\r | |
31 | baud rate is not supported, the speed will be\r | |
32 | reduced to the nearest supported one and the\r | |
33 | variable's value will be updated accordingly.\r | |
34 | @param[in out] ReceiveFifoDepth The number of characters the device will\r | |
35 | buffer on input. Value of 0 will use the\r | |
36 | device's default FIFO depth.\r | |
37 | @param[in out] Parity If applicable, this is the EFI_PARITY_TYPE\r | |
38 | that is computed or checked as each character\r | |
39 | is transmitted or received. If the device\r | |
40 | does not support parity, the value is the\r | |
41 | default parity value.\r | |
42 | @param[in out] DataBits The number of data bits in each character.\r | |
43 | @param[in out] StopBits If applicable, the EFI_STOP_BITS_TYPE number\r | |
44 | of stop bits per character.\r | |
45 | If the device does not support stop bits, the\r | |
46 | value is the default stop bit value.\r | |
47 | \r | |
48 | @retval RETURN_SUCCESS All attributes were set correctly on the\r | |
49 | serial device.\r | |
50 | @retval RETURN_INVALID_PARAMETER One or more of the attributes has an\r | |
51 | unsupported value.\r | |
52 | \r | |
53 | **/\r | |
54 | RETURN_STATUS\r | |
55 | EFIAPI\r | |
56 | PL011UartInitializePort (\r | |
57 | IN UINTN UartBase,\r | |
58 | IN UINT32 UartClkInHz,\r | |
59 | IN OUT UINT64 *BaudRate,\r | |
60 | IN OUT UINT32 *ReceiveFifoDepth,\r | |
61 | IN OUT EFI_PARITY_TYPE *Parity,\r | |
62 | IN OUT UINT8 *DataBits,\r | |
63 | IN OUT EFI_STOP_BITS_TYPE *StopBits\r | |
64 | );\r | |
65 | \r | |
66 | /**\r | |
67 | \r | |
68 | Assert or deassert the control signals on a serial port.\r | |
69 | The following control signals are set according their bit settings :\r | |
70 | . Request to Send\r | |
71 | . Data Terminal Ready\r | |
72 | \r | |
73 | @param[in] UartBase UART registers base address\r | |
74 | @param[in] Control The following bits are taken into account :\r | |
75 | . EFI_SERIAL_REQUEST_TO_SEND : assert/deassert the\r | |
76 | "Request To Send" control signal if this bit is\r | |
77 | equal to one/zero.\r | |
78 | . EFI_SERIAL_DATA_TERMINAL_READY : assert/deassert\r | |
79 | the "Data Terminal Ready" control signal if this\r | |
80 | bit is equal to one/zero.\r | |
81 | . EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : enable/disable\r | |
82 | the hardware loopback if this bit is equal to\r | |
83 | one/zero.\r | |
84 | . EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : not supported.\r | |
85 | . EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : enable/\r | |
86 | disable the hardware flow control based on CTS (Clear\r | |
87 | To Send) and RTS (Ready To Send) control signals.\r | |
88 | \r | |
89 | @retval RETURN_SUCCESS The new control bits were set on the device.\r | |
90 | @retval RETURN_UNSUPPORTED The device does not support this operation.\r | |
91 | \r | |
92 | **/\r | |
93 | RETURN_STATUS\r | |
94 | EFIAPI\r | |
95 | PL011UartSetControl (\r | |
96 | IN UINTN UartBase,\r | |
97 | IN UINT32 Control\r | |
98 | );\r | |
99 | \r | |
100 | /**\r | |
101 | \r | |
102 | Retrieve the status of the control bits on a serial device.\r | |
103 | \r | |
104 | @param[in] UartBase UART registers base address\r | |
105 | @param[out] Control Status of the control bits on a serial device :\r | |
106 | \r | |
107 | . EFI_SERIAL_DATA_CLEAR_TO_SEND,\r | |
108 | EFI_SERIAL_DATA_SET_READY,\r | |
109 | EFI_SERIAL_RING_INDICATE,\r | |
110 | EFI_SERIAL_CARRIER_DETECT,\r | |
111 | EFI_SERIAL_REQUEST_TO_SEND,\r | |
112 | EFI_SERIAL_DATA_TERMINAL_READY\r | |
113 | are all related to the DTE (Data Terminal Equipment)\r | |
114 | and DCE (Data Communication Equipment) modes of\r | |
115 | operation of the serial device.\r | |
116 | . EFI_SERIAL_INPUT_BUFFER_EMPTY : equal to one if the\r | |
117 | receive buffer is empty, 0 otherwise.\r | |
118 | . EFI_SERIAL_OUTPUT_BUFFER_EMPTY : equal to one if the\r | |
119 | transmit buffer is empty, 0 otherwise.\r | |
120 | . EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : equal to one if\r | |
121 | the hardware loopback is enabled (the ouput feeds the\r | |
122 | receive buffer), 0 otherwise.\r | |
123 | . EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : equal to one if\r | |
124 | a loopback is accomplished by software, 0 otherwise.\r | |
125 | . EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : equal to\r | |
126 | one if the hardware flow control based on CTS (Clear\r | |
127 | To Send) and RTS (Ready To Send) control signals is\r | |
128 | enabled, 0 otherwise.\r | |
129 | \r | |
130 | @retval RETURN_SUCCESS The control bits were read from the serial device.\r | |
131 | \r | |
132 | **/\r | |
133 | RETURN_STATUS\r | |
134 | EFIAPI\r | |
135 | PL011UartGetControl (\r | |
136 | IN UINTN UartBase,\r | |
137 | OUT UINT32 *Control\r | |
138 | );\r | |
139 | \r | |
140 | /**\r | |
141 | Write data to serial device.\r | |
142 | \r | |
143 | @param Buffer Point of data buffer which need to be written.\r | |
144 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
145 | \r | |
146 | @retval 0 Write data failed.\r | |
147 | @retval !0 Actual number of bytes written to serial device.\r | |
148 | \r | |
149 | **/\r | |
150 | UINTN\r | |
151 | EFIAPI\r | |
152 | PL011UartWrite (\r | |
153 | IN UINTN UartBase,\r | |
154 | IN UINT8 *Buffer,\r | |
155 | IN UINTN NumberOfBytes\r | |
156 | );\r | |
157 | \r | |
158 | /**\r | |
159 | Read data from serial device and save the data in buffer.\r | |
160 | \r | |
161 | @param Buffer Point of data buffer which need to be written.\r | |
162 | @param NumberOfBytes Number of output bytes which are cached in Buffer.\r | |
163 | \r | |
164 | @retval 0 Read data failed.\r | |
165 | @retval !0 Actual number of bytes read from serial device.\r | |
166 | \r | |
167 | **/\r | |
168 | UINTN\r | |
169 | EFIAPI\r | |
170 | PL011UartRead (\r | |
171 | IN UINTN UartBase,\r | |
172 | OUT UINT8 *Buffer,\r | |
173 | IN UINTN NumberOfBytes\r | |
174 | );\r | |
175 | \r | |
176 | /**\r | |
177 | Check to see if any data is available to be read from the debug device.\r | |
178 | \r | |
179 | @retval TRUE At least one byte of data is available to be read\r | |
180 | @retval FALSE No data is available to be read\r | |
181 | \r | |
182 | **/\r | |
183 | BOOLEAN\r | |
184 | EFIAPI\r | |
185 | PL011UartPoll (\r | |
186 | IN UINTN UartBase\r | |
187 | );\r | |
188 | \r | |
189 | #endif\r |