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1 | /** @file\r | |
2 | Serial IO protocol as defined in the UEFI 2.0 specification.\r | |
3 | \r | |
4 | Abstraction of a basic serial device. Targeted at 16550 UART, but\r | |
5 | could be much more generic.\r | |
6 | \r | |
7 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | \r | |
10 | **/\r | |
11 | \r | |
12 | #ifndef __SERIAL_IO_PROTOCOL_H__\r | |
13 | #define __SERIAL_IO_PROTOCOL_H__\r | |
14 | \r | |
15 | #define EFI_SERIAL_IO_PROTOCOL_GUID \\r | |
16 | { \\r | |
17 | 0xBB25CF6F, 0xF1D4, 0x11D2, {0x9A, 0x0C, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0xFD } \\r | |
18 | }\r | |
19 | \r | |
20 | ///\r | |
21 | /// Protocol GUID defined in EFI1.1.\r | |
22 | ///\r | |
23 | #define SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL_GUID\r | |
24 | \r | |
25 | typedef struct _EFI_SERIAL_IO_PROTOCOL EFI_SERIAL_IO_PROTOCOL;\r | |
26 | \r | |
27 | \r | |
28 | ///\r | |
29 | /// Backward-compatible with EFI1.1.\r | |
30 | ///\r | |
31 | typedef EFI_SERIAL_IO_PROTOCOL SERIAL_IO_INTERFACE;\r | |
32 | \r | |
33 | ///\r | |
34 | /// Parity type that is computed or checked as each character is transmitted or received. If the\r | |
35 | /// device does not support parity, the value is the default parity value.\r | |
36 | ///\r | |
37 | typedef enum {\r | |
38 | DefaultParity,\r | |
39 | NoParity,\r | |
40 | EvenParity,\r | |
41 | OddParity,\r | |
42 | MarkParity,\r | |
43 | SpaceParity\r | |
44 | } EFI_PARITY_TYPE;\r | |
45 | \r | |
46 | ///\r | |
47 | /// Stop bits type\r | |
48 | ///\r | |
49 | typedef enum {\r | |
50 | DefaultStopBits,\r | |
51 | OneStopBit,\r | |
52 | OneFiveStopBits,\r | |
53 | TwoStopBits\r | |
54 | } EFI_STOP_BITS_TYPE;\r | |
55 | \r | |
56 | //\r | |
57 | // define for Control bits, grouped by read only, write only, and read write\r | |
58 | //\r | |
59 | //\r | |
60 | // Read Only\r | |
61 | //\r | |
62 | #define EFI_SERIAL_CLEAR_TO_SEND 0x00000010\r | |
63 | #define EFI_SERIAL_DATA_SET_READY 0x00000020\r | |
64 | #define EFI_SERIAL_RING_INDICATE 0x00000040\r | |
65 | #define EFI_SERIAL_CARRIER_DETECT 0x00000080\r | |
66 | #define EFI_SERIAL_INPUT_BUFFER_EMPTY 0x00000100\r | |
67 | #define EFI_SERIAL_OUTPUT_BUFFER_EMPTY 0x00000200\r | |
68 | \r | |
69 | //\r | |
70 | // Write Only\r | |
71 | //\r | |
72 | #define EFI_SERIAL_REQUEST_TO_SEND 0x00000002\r | |
73 | #define EFI_SERIAL_DATA_TERMINAL_READY 0x00000001\r | |
74 | \r | |
75 | //\r | |
76 | // Read Write\r | |
77 | //\r | |
78 | #define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE 0x00001000\r | |
79 | #define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE 0x00002000\r | |
80 | #define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000\r | |
81 | \r | |
82 | //\r | |
83 | // Serial IO Member Functions\r | |
84 | //\r | |
85 | /**\r | |
86 | Reset the serial device.\r | |
87 | \r | |
88 | @param This Protocol instance pointer.\r | |
89 | \r | |
90 | @retval EFI_SUCCESS The device was reset.\r | |
91 | @retval EFI_DEVICE_ERROR The serial device could not be reset.\r | |
92 | \r | |
93 | **/\r | |
94 | typedef\r | |
95 | EFI_STATUS\r | |
96 | (EFIAPI *EFI_SERIAL_RESET)(\r | |
97 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
98 | );\r | |
99 | \r | |
100 | /**\r | |
101 | Sets the baud rate, receive FIFO depth, transmit/receice time out, parity,\r | |
102 | data bits, and stop bits on a serial device.\r | |
103 | \r | |
104 | @param This Protocol instance pointer.\r | |
105 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the\r | |
106 | device's default interface speed.\r | |
107 | @param ReveiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
108 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
109 | the device's default FIFO depth.\r | |
110 | @param Timeout The requested time out for a single character in microseconds.\r | |
111 | This timeout applies to both the transmit and receive side of the\r | |
112 | interface. A Timeout value of 0 will use the device's default time\r | |
113 | out value.\r | |
114 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
115 | DefaultParity will use the device's default parity value.\r | |
116 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
117 | vaule of 0 will use the device's default data bit setting.\r | |
118 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
119 | value of DefaultStopBits will use the device's default number of\r | |
120 | stop bits.\r | |
121 | \r | |
122 | @retval EFI_SUCCESS The device was reset.\r | |
123 | @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r | |
124 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
125 | \r | |
126 | **/\r | |
127 | typedef\r | |
128 | EFI_STATUS\r | |
129 | (EFIAPI *EFI_SERIAL_SET_ATTRIBUTES)(\r | |
130 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
131 | IN UINT64 BaudRate,\r | |
132 | IN UINT32 ReceiveFifoDepth,\r | |
133 | IN UINT32 Timeout,\r | |
134 | IN EFI_PARITY_TYPE Parity,\r | |
135 | IN UINT8 DataBits,\r | |
136 | IN EFI_STOP_BITS_TYPE StopBits\r | |
137 | );\r | |
138 | \r | |
139 | /**\r | |
140 | Set the control bits on a serial device\r | |
141 | \r | |
142 | @param This Protocol instance pointer.\r | |
143 | @param Control Set the bits of Control that are settable.\r | |
144 | \r | |
145 | @retval EFI_SUCCESS The new control bits were set on the serial device.\r | |
146 | @retval EFI_UNSUPPORTED The serial device does not support this operation.\r | |
147 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
148 | \r | |
149 | **/\r | |
150 | typedef\r | |
151 | EFI_STATUS\r | |
152 | (EFIAPI *EFI_SERIAL_SET_CONTROL_BITS)(\r | |
153 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
154 | IN UINT32 Control\r | |
155 | );\r | |
156 | \r | |
157 | /**\r | |
158 | Retrieves the status of thecontrol bits on a serial device\r | |
159 | \r | |
160 | @param This Protocol instance pointer.\r | |
161 | @param Control A pointer to return the current Control signals from the serial device.\r | |
162 | \r | |
163 | @retval EFI_SUCCESS The control bits were read from the serial device.\r | |
164 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
165 | \r | |
166 | **/\r | |
167 | typedef\r | |
168 | EFI_STATUS\r | |
169 | (EFIAPI *EFI_SERIAL_GET_CONTROL_BITS)(\r | |
170 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
171 | OUT UINT32 *Control\r | |
172 | );\r | |
173 | \r | |
174 | /**\r | |
175 | Writes data to a serial device.\r | |
176 | \r | |
177 | @param This Protocol instance pointer.\r | |
178 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
179 | data actually written.\r | |
180 | @param Buffer The buffer of data to write\r | |
181 | \r | |
182 | @retval EFI_SUCCESS The data was written.\r | |
183 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
184 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
185 | \r | |
186 | **/\r | |
187 | typedef\r | |
188 | EFI_STATUS\r | |
189 | (EFIAPI *EFI_SERIAL_WRITE)(\r | |
190 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
191 | IN OUT UINTN *BufferSize,\r | |
192 | IN VOID *Buffer\r | |
193 | );\r | |
194 | \r | |
195 | /**\r | |
196 | Writes data to a serial device.\r | |
197 | \r | |
198 | @param This Protocol instance pointer.\r | |
199 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
200 | data returned in Buffer.\r | |
201 | @param Buffer The buffer to return the data into.\r | |
202 | \r | |
203 | @retval EFI_SUCCESS The data was read.\r | |
204 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
205 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
206 | \r | |
207 | **/\r | |
208 | typedef\r | |
209 | EFI_STATUS\r | |
210 | (EFIAPI *EFI_SERIAL_READ)(\r | |
211 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
212 | IN OUT UINTN *BufferSize,\r | |
213 | OUT VOID *Buffer\r | |
214 | );\r | |
215 | \r | |
216 | /**\r | |
217 | @par Data Structure Description:\r | |
218 | The data values in SERIAL_IO_MODE are read-only and are updated by the code\r | |
219 | that produces the SERIAL_IO_PROTOCOL member functions.\r | |
220 | \r | |
221 | @param ControlMask\r | |
222 | A mask for the Control bits that the device supports. The device\r | |
223 | must always support the Input Buffer Empty control bit.\r | |
224 | \r | |
225 | @param TimeOut\r | |
226 | If applicable, the number of microseconds to wait before timing out\r | |
227 | a Read or Write operation.\r | |
228 | \r | |
229 | @param BaudRate\r | |
230 | If applicable, the current baud rate setting of the device; otherwise,\r | |
231 | baud rate has the value of zero to indicate that device runs at the\r | |
232 | device's designed speed.\r | |
233 | \r | |
234 | @param ReceiveFifoDepth\r | |
235 | The number of characters the device will buffer on input\r | |
236 | \r | |
237 | @param DataBits\r | |
238 | The number of characters the device will buffer on input\r | |
239 | \r | |
240 | @param Parity\r | |
241 | If applicable, this is the EFI_PARITY_TYPE that is computed or\r | |
242 | checked as each character is transmitted or reveived. If the device\r | |
243 | does not support parity the value is the default parity value.\r | |
244 | \r | |
245 | @param StopBits\r | |
246 | If applicable, the EFI_STOP_BITS_TYPE number of stop bits per\r | |
247 | character. If the device does not support stop bits the value is\r | |
248 | the default stop bit values.\r | |
249 | \r | |
250 | **/\r | |
251 | typedef struct {\r | |
252 | UINT32 ControlMask;\r | |
253 | \r | |
254 | //\r | |
255 | // current Attributes\r | |
256 | //\r | |
257 | UINT32 Timeout;\r | |
258 | UINT64 BaudRate;\r | |
259 | UINT32 ReceiveFifoDepth;\r | |
260 | UINT32 DataBits;\r | |
261 | UINT32 Parity;\r | |
262 | UINT32 StopBits;\r | |
263 | } EFI_SERIAL_IO_MODE;\r | |
264 | \r | |
265 | #define EFI_SERIAL_IO_PROTOCOL_REVISION 0x00010000\r | |
266 | #define EFI_SERIAL_IO_PROTOCOL_REVISION1p1 0x00010001\r | |
267 | #define SERIAL_IO_INTERFACE_REVISION EFI_SERIAL_IO_PROTOCOL_REVISION\r | |
268 | \r | |
269 | ///\r | |
270 | /// The Serial I/O protocol is used to communicate with UART-style serial devices.\r | |
271 | /// These can be standard UART serial ports in PC-AT systems, serial ports attached\r | |
272 | /// to a USB interface, or potentially any character-based I/O device.\r | |
273 | ///\r | |
274 | struct _EFI_SERIAL_IO_PROTOCOL {\r | |
275 | ///\r | |
276 | /// The revision to which the EFI_SERIAL_IO_PROTOCOL adheres. All future revisions\r | |
277 | /// must be backwards compatible. If a future version is not backwards compatible,\r | |
278 | /// it is not the same GUID.\r | |
279 | ///\r | |
280 | UINT32 Revision;\r | |
281 | EFI_SERIAL_RESET Reset;\r | |
282 | EFI_SERIAL_SET_ATTRIBUTES SetAttributes;\r | |
283 | EFI_SERIAL_SET_CONTROL_BITS SetControl;\r | |
284 | EFI_SERIAL_GET_CONTROL_BITS GetControl;\r | |
285 | EFI_SERIAL_WRITE Write;\r | |
286 | EFI_SERIAL_READ Read;\r | |
287 | ///\r | |
288 | /// Pointer to SERIAL_IO_MODE data.\r | |
289 | ///\r | |
290 | EFI_SERIAL_IO_MODE *Mode;\r | |
291 | ///\r | |
292 | /// Pointer to a GUID identifying the device connected to the serial port.\r | |
293 | /// This field is NULL when the protocol is installed by the serial port\r | |
294 | /// driver and may be populated by a platform driver for a serial port\r | |
295 | /// with a known device attached. The field will remain NULL if there is\r | |
296 | /// no platform serial device identification information available.\r | |
297 | ///\r | |
298 | CONST EFI_GUID *DeviceTypeGuid; // Revision 1.1\r | |
299 | };\r | |
300 | \r | |
301 | extern EFI_GUID gEfiSerialIoProtocolGuid;\r | |
302 | \r | |
303 | #endif\r |