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1 | /** @file\r | |
2 | Serial driver that layers on top of a Serial Port Library instance.\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
5 | Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>\r | |
6 | Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r | |
7 | \r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | \r | |
10 | **/\r | |
11 | \r | |
12 | #include <Library/UefiBootServicesTableLib.h>\r | |
13 | #include <Library/SerialPortLib.h>\r | |
14 | #include <Library/DebugLib.h>\r | |
15 | #include <Library/PcdLib.h>\r | |
16 | \r | |
17 | #include <Protocol/SerialIo.h>\r | |
18 | #include <Protocol/DevicePath.h>\r | |
19 | #include <Guid/SerialPortLibVendor.h>\r | |
20 | \r | |
21 | typedef struct {\r | |
22 | VENDOR_DEVICE_PATH Guid;\r | |
23 | UART_DEVICE_PATH Uart;\r | |
24 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
25 | } SERIAL_DEVICE_PATH;\r | |
26 | \r | |
27 | /**\r | |
28 | Reset the serial device.\r | |
29 | \r | |
30 | @param This Protocol instance pointer.\r | |
31 | \r | |
32 | @retval EFI_SUCCESS The device was reset.\r | |
33 | @retval EFI_DEVICE_ERROR The serial device could not be reset.\r | |
34 | \r | |
35 | **/\r | |
36 | EFI_STATUS\r | |
37 | EFIAPI\r | |
38 | SerialReset (\r | |
39 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
40 | );\r | |
41 | \r | |
42 | /**\r | |
43 | Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,\r | |
44 | data bits, and stop bits on a serial device.\r | |
45 | \r | |
46 | @param This Protocol instance pointer.\r | |
47 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the\r | |
48 | device's default interface speed.\r | |
49 | @param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
50 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
51 | the device's default FIFO depth.\r | |
52 | @param Timeout The requested time out for a single character in microseconds.\r | |
53 | This timeout applies to both the transmit and receive side of the\r | |
54 | interface. A Timeout value of 0 will use the device's default time\r | |
55 | out value.\r | |
56 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
57 | DefaultParity will use the device's default parity value.\r | |
58 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
59 | value of 0 will use the device's default data bit setting.\r | |
60 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
61 | value of DefaultStopBits will use the device's default number of\r | |
62 | stop bits.\r | |
63 | \r | |
64 | @retval EFI_SUCCESS The device was reset.\r | |
65 | @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r | |
66 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
67 | \r | |
68 | **/\r | |
69 | EFI_STATUS\r | |
70 | EFIAPI\r | |
71 | SerialSetAttributes (\r | |
72 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
73 | IN UINT64 BaudRate,\r | |
74 | IN UINT32 ReceiveFifoDepth,\r | |
75 | IN UINT32 Timeout,\r | |
76 | IN EFI_PARITY_TYPE Parity,\r | |
77 | IN UINT8 DataBits,\r | |
78 | IN EFI_STOP_BITS_TYPE StopBits\r | |
79 | );\r | |
80 | \r | |
81 | /**\r | |
82 | Set the control bits on a serial device\r | |
83 | \r | |
84 | @param This Protocol instance pointer.\r | |
85 | @param Control Set the bits of Control that are settable.\r | |
86 | \r | |
87 | @retval EFI_SUCCESS The new control bits were set on the serial device.\r | |
88 | @retval EFI_UNSUPPORTED The serial device does not support this operation.\r | |
89 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
90 | \r | |
91 | **/\r | |
92 | EFI_STATUS\r | |
93 | EFIAPI\r | |
94 | SerialSetControl (\r | |
95 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
96 | IN UINT32 Control\r | |
97 | );\r | |
98 | \r | |
99 | /**\r | |
100 | Retrieves the status of the control bits on a serial device\r | |
101 | \r | |
102 | @param This Protocol instance pointer.\r | |
103 | @param Control A pointer to return the current Control signals from the serial device.\r | |
104 | \r | |
105 | @retval EFI_SUCCESS The control bits were read from the serial device.\r | |
106 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
107 | \r | |
108 | **/\r | |
109 | EFI_STATUS\r | |
110 | EFIAPI\r | |
111 | SerialGetControl (\r | |
112 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
113 | OUT UINT32 *Control\r | |
114 | );\r | |
115 | \r | |
116 | /**\r | |
117 | Writes data to a serial device.\r | |
118 | \r | |
119 | @param This Protocol instance pointer.\r | |
120 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
121 | data actually written.\r | |
122 | @param Buffer The buffer of data to write\r | |
123 | \r | |
124 | @retval EFI_SUCCESS The data was written.\r | |
125 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
126 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
127 | \r | |
128 | **/\r | |
129 | EFI_STATUS\r | |
130 | EFIAPI\r | |
131 | SerialWrite (\r | |
132 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
133 | IN OUT UINTN *BufferSize,\r | |
134 | IN VOID *Buffer\r | |
135 | );\r | |
136 | \r | |
137 | /**\r | |
138 | Reads data from a serial device.\r | |
139 | \r | |
140 | @param This Protocol instance pointer.\r | |
141 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
142 | data returned in Buffer.\r | |
143 | @param Buffer The buffer to return the data into.\r | |
144 | \r | |
145 | @retval EFI_SUCCESS The data was read.\r | |
146 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
147 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
148 | \r | |
149 | **/\r | |
150 | EFI_STATUS\r | |
151 | EFIAPI\r | |
152 | SerialRead (\r | |
153 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
154 | IN OUT UINTN *BufferSize,\r | |
155 | OUT VOID *Buffer\r | |
156 | );\r | |
157 | \r | |
158 | EFI_HANDLE mSerialHandle = NULL;\r | |
159 | \r | |
160 | SERIAL_DEVICE_PATH mSerialDevicePath = {\r | |
161 | {\r | |
162 | { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0} },\r | |
163 | EDKII_SERIAL_PORT_LIB_VENDOR_GUID\r | |
164 | },\r | |
165 | {\r | |
166 | { MESSAGING_DEVICE_PATH, MSG_UART_DP, { sizeof (UART_DEVICE_PATH), 0} },\r | |
167 | 0, // Reserved\r | |
168 | 0, // BaudRate\r | |
169 | 0, // DataBits\r | |
170 | 0, // Parity\r | |
171 | 0 // StopBits\r | |
172 | },\r | |
173 | { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }\r | |
174 | };\r | |
175 | \r | |
176 | //\r | |
177 | // Template used to initialize the Serial IO protocols.\r | |
178 | //\r | |
179 | EFI_SERIAL_IO_MODE mSerialIoMode = {\r | |
180 | //\r | |
181 | // value field set in SerialDxeInitialize()?\r | |
182 | //--------- ------------------- -----------------------------\r | |
183 | 0, // ControlMask\r | |
184 | 1000 * 1000, // Timeout\r | |
185 | 0, // BaudRate yes\r | |
186 | 1, // ReceiveFifoDepth\r | |
187 | 0, // DataBits yes\r | |
188 | 0, // Parity yes\r | |
189 | 0 // StopBits yes\r | |
190 | };\r | |
191 | \r | |
192 | EFI_SERIAL_IO_PROTOCOL mSerialIoTemplate = {\r | |
193 | SERIAL_IO_INTERFACE_REVISION,\r | |
194 | SerialReset,\r | |
195 | SerialSetAttributes,\r | |
196 | SerialSetControl,\r | |
197 | SerialGetControl,\r | |
198 | SerialWrite,\r | |
199 | SerialRead,\r | |
200 | &mSerialIoMode\r | |
201 | };\r | |
202 | \r | |
203 | /**\r | |
204 | Reset the serial device.\r | |
205 | \r | |
206 | @param This Protocol instance pointer.\r | |
207 | \r | |
208 | @retval EFI_SUCCESS The device was reset.\r | |
209 | @retval EFI_DEVICE_ERROR The serial device could not be reset.\r | |
210 | \r | |
211 | **/\r | |
212 | EFI_STATUS\r | |
213 | EFIAPI\r | |
214 | SerialReset (\r | |
215 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
216 | )\r | |
217 | {\r | |
218 | EFI_STATUS Status;\r | |
219 | \r | |
220 | Status = SerialPortInitialize ();\r | |
221 | if (EFI_ERROR (Status)) {\r | |
222 | return Status;\r | |
223 | }\r | |
224 | \r | |
225 | //\r | |
226 | // Go set the current attributes\r | |
227 | //\r | |
228 | Status = This->SetAttributes (\r | |
229 | This,\r | |
230 | This->Mode->BaudRate,\r | |
231 | This->Mode->ReceiveFifoDepth,\r | |
232 | This->Mode->Timeout,\r | |
233 | (EFI_PARITY_TYPE) This->Mode->Parity,\r | |
234 | (UINT8) This->Mode->DataBits,\r | |
235 | (EFI_STOP_BITS_TYPE) This->Mode->StopBits\r | |
236 | );\r | |
237 | \r | |
238 | //\r | |
239 | // The serial device may not support some of the attributes. To prevent\r | |
240 | // later failure, always return EFI_SUCCESS when SetAttributes is returning\r | |
241 | // EFI_INVALID_PARAMETER.\r | |
242 | //\r | |
243 | if (Status == EFI_INVALID_PARAMETER) {\r | |
244 | return EFI_SUCCESS;\r | |
245 | }\r | |
246 | \r | |
247 | return Status;\r | |
248 | }\r | |
249 | \r | |
250 | /**\r | |
251 | Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,\r | |
252 | data bits, and stop bits on a serial device.\r | |
253 | \r | |
254 | @param This Protocol instance pointer.\r | |
255 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the\r | |
256 | device's default interface speed.\r | |
257 | @param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
258 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
259 | the device's default FIFO depth.\r | |
260 | @param Timeout The requested time out for a single character in microseconds.\r | |
261 | This timeout applies to both the transmit and receive side of the\r | |
262 | interface. A Timeout value of 0 will use the device's default time\r | |
263 | out value.\r | |
264 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
265 | DefaultParity will use the device's default parity value.\r | |
266 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
267 | value of 0 will use the device's default data bit setting.\r | |
268 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
269 | value of DefaultStopBits will use the device's default number of\r | |
270 | stop bits.\r | |
271 | \r | |
272 | @retval EFI_SUCCESS The device was reset.\r | |
273 | @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r | |
274 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
275 | \r | |
276 | **/\r | |
277 | EFI_STATUS\r | |
278 | EFIAPI\r | |
279 | SerialSetAttributes (\r | |
280 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
281 | IN UINT64 BaudRate,\r | |
282 | IN UINT32 ReceiveFifoDepth,\r | |
283 | IN UINT32 Timeout,\r | |
284 | IN EFI_PARITY_TYPE Parity,\r | |
285 | IN UINT8 DataBits,\r | |
286 | IN EFI_STOP_BITS_TYPE StopBits\r | |
287 | )\r | |
288 | {\r | |
289 | EFI_STATUS Status;\r | |
290 | EFI_TPL Tpl;\r | |
291 | UINT64 OriginalBaudRate;\r | |
292 | UINT32 OriginalReceiveFifoDepth;\r | |
293 | UINT32 OriginalTimeout;\r | |
294 | EFI_PARITY_TYPE OriginalParity;\r | |
295 | UINT8 OriginalDataBits;\r | |
296 | EFI_STOP_BITS_TYPE OriginalStopBits;\r | |
297 | \r | |
298 | //\r | |
299 | // Preserve the original input values in case\r | |
300 | // SerialPortSetAttributes() updates the input/output\r | |
301 | // parameters even on error.\r | |
302 | //\r | |
303 | OriginalBaudRate = BaudRate;\r | |
304 | OriginalReceiveFifoDepth = ReceiveFifoDepth;\r | |
305 | OriginalTimeout = Timeout;\r | |
306 | OriginalParity = Parity;\r | |
307 | OriginalDataBits = DataBits;\r | |
308 | OriginalStopBits = StopBits;\r | |
309 | Status = SerialPortSetAttributes (&BaudRate, &ReceiveFifoDepth, &Timeout, &Parity, &DataBits, &StopBits);\r | |
310 | if (EFI_ERROR (Status)) {\r | |
311 | //\r | |
312 | // If it is just to set Timeout value and unsupported is returned,\r | |
313 | // do not return error.\r | |
314 | //\r | |
315 | if ((Status == EFI_UNSUPPORTED) &&\r | |
316 | (This->Mode->Timeout != OriginalTimeout) &&\r | |
317 | (This->Mode->ReceiveFifoDepth == OriginalReceiveFifoDepth) &&\r | |
318 | (This->Mode->BaudRate == OriginalBaudRate) &&\r | |
319 | (This->Mode->DataBits == (UINT32) OriginalDataBits) &&\r | |
320 | (This->Mode->Parity == (UINT32) OriginalParity) &&\r | |
321 | (This->Mode->StopBits == (UINT32) OriginalStopBits)) {\r | |
322 | //\r | |
323 | // Restore to the original input values.\r | |
324 | //\r | |
325 | BaudRate = OriginalBaudRate;\r | |
326 | ReceiveFifoDepth = OriginalReceiveFifoDepth;\r | |
327 | Timeout = OriginalTimeout;\r | |
328 | Parity = OriginalParity;\r | |
329 | DataBits = OriginalDataBits;\r | |
330 | StopBits = OriginalStopBits;\r | |
331 | Status = EFI_SUCCESS;\r | |
332 | } else if (Status == EFI_INVALID_PARAMETER || Status == EFI_UNSUPPORTED) {\r | |
333 | return EFI_INVALID_PARAMETER;\r | |
334 | } else {\r | |
335 | return EFI_DEVICE_ERROR;\r | |
336 | }\r | |
337 | }\r | |
338 | \r | |
339 | //\r | |
340 | // Set the Serial I/O mode and update the device path\r | |
341 | //\r | |
342 | \r | |
343 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
344 | \r | |
345 | //\r | |
346 | // Set the Serial I/O mode\r | |
347 | //\r | |
348 | This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;\r | |
349 | This->Mode->Timeout = Timeout;\r | |
350 | This->Mode->BaudRate = BaudRate;\r | |
351 | This->Mode->DataBits = (UINT32) DataBits;\r | |
352 | This->Mode->Parity = (UINT32) Parity;\r | |
353 | This->Mode->StopBits = (UINT32) StopBits;\r | |
354 | \r | |
355 | //\r | |
356 | // Check if the device path has actually changed\r | |
357 | //\r | |
358 | if (mSerialDevicePath.Uart.BaudRate == BaudRate &&\r | |
359 | mSerialDevicePath.Uart.DataBits == DataBits &&\r | |
360 | mSerialDevicePath.Uart.Parity == (UINT8) Parity &&\r | |
361 | mSerialDevicePath.Uart.StopBits == (UINT8) StopBits\r | |
362 | ) {\r | |
363 | gBS->RestoreTPL (Tpl);\r | |
364 | return EFI_SUCCESS;\r | |
365 | }\r | |
366 | \r | |
367 | //\r | |
368 | // Update the device path\r | |
369 | //\r | |
370 | mSerialDevicePath.Uart.BaudRate = BaudRate;\r | |
371 | mSerialDevicePath.Uart.DataBits = DataBits;\r | |
372 | mSerialDevicePath.Uart.Parity = (UINT8) Parity;\r | |
373 | mSerialDevicePath.Uart.StopBits = (UINT8) StopBits;\r | |
374 | \r | |
375 | Status = gBS->ReinstallProtocolInterface (\r | |
376 | mSerialHandle,\r | |
377 | &gEfiDevicePathProtocolGuid,\r | |
378 | &mSerialDevicePath,\r | |
379 | &mSerialDevicePath\r | |
380 | );\r | |
381 | \r | |
382 | gBS->RestoreTPL (Tpl);\r | |
383 | \r | |
384 | return Status;\r | |
385 | }\r | |
386 | \r | |
387 | /**\r | |
388 | Set the control bits on a serial device\r | |
389 | \r | |
390 | @param This Protocol instance pointer.\r | |
391 | @param Control Set the bits of Control that are settable.\r | |
392 | \r | |
393 | @retval EFI_SUCCESS The new control bits were set on the serial device.\r | |
394 | @retval EFI_UNSUPPORTED The serial device does not support this operation.\r | |
395 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
396 | \r | |
397 | **/\r | |
398 | EFI_STATUS\r | |
399 | EFIAPI\r | |
400 | SerialSetControl (\r | |
401 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
402 | IN UINT32 Control\r | |
403 | )\r | |
404 | {\r | |
405 | return SerialPortSetControl (Control);\r | |
406 | }\r | |
407 | \r | |
408 | /**\r | |
409 | Retrieves the status of the control bits on a serial device\r | |
410 | \r | |
411 | @param This Protocol instance pointer.\r | |
412 | @param Control A pointer to return the current Control signals from the serial device.\r | |
413 | \r | |
414 | @retval EFI_SUCCESS The control bits were read from the serial device.\r | |
415 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
416 | \r | |
417 | **/\r | |
418 | EFI_STATUS\r | |
419 | EFIAPI\r | |
420 | SerialGetControl (\r | |
421 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
422 | OUT UINT32 *Control\r | |
423 | )\r | |
424 | {\r | |
425 | return SerialPortGetControl (Control);\r | |
426 | }\r | |
427 | \r | |
428 | /**\r | |
429 | Writes data to a serial device.\r | |
430 | \r | |
431 | @param This Protocol instance pointer.\r | |
432 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
433 | data actually written.\r | |
434 | @param Buffer The buffer of data to write\r | |
435 | \r | |
436 | @retval EFI_SUCCESS The data was written.\r | |
437 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
438 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
439 | \r | |
440 | **/\r | |
441 | EFI_STATUS\r | |
442 | EFIAPI\r | |
443 | SerialWrite (\r | |
444 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
445 | IN OUT UINTN *BufferSize,\r | |
446 | IN VOID *Buffer\r | |
447 | )\r | |
448 | {\r | |
449 | UINTN Count;\r | |
450 | \r | |
451 | Count = SerialPortWrite (Buffer, *BufferSize);\r | |
452 | \r | |
453 | if (Count != *BufferSize) {\r | |
454 | *BufferSize = Count;\r | |
455 | return EFI_TIMEOUT;\r | |
456 | }\r | |
457 | \r | |
458 | return EFI_SUCCESS;\r | |
459 | }\r | |
460 | \r | |
461 | /**\r | |
462 | Reads data from a serial device.\r | |
463 | \r | |
464 | @param This Protocol instance pointer.\r | |
465 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
466 | data returned in Buffer.\r | |
467 | @param Buffer The buffer to return the data into.\r | |
468 | \r | |
469 | @retval EFI_SUCCESS The data was read.\r | |
470 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
471 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
472 | \r | |
473 | **/\r | |
474 | EFI_STATUS\r | |
475 | EFIAPI\r | |
476 | SerialRead (\r | |
477 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
478 | IN OUT UINTN *BufferSize,\r | |
479 | OUT VOID *Buffer\r | |
480 | )\r | |
481 | {\r | |
482 | UINTN Count;\r | |
483 | UINTN TimeOut;\r | |
484 | \r | |
485 | Count = 0;\r | |
486 | \r | |
487 | while (Count < *BufferSize) {\r | |
488 | TimeOut = 0;\r | |
489 | while (TimeOut < mSerialIoMode.Timeout) {\r | |
490 | if (SerialPortPoll ()) {\r | |
491 | break;\r | |
492 | }\r | |
493 | gBS->Stall (10);\r | |
494 | TimeOut += 10;\r | |
495 | }\r | |
496 | if (TimeOut >= mSerialIoMode.Timeout) {\r | |
497 | break;\r | |
498 | }\r | |
499 | SerialPortRead (Buffer, 1);\r | |
500 | Count++;\r | |
501 | Buffer = (VOID *) ((UINT8 *) Buffer + 1);\r | |
502 | }\r | |
503 | \r | |
504 | if (Count != *BufferSize) {\r | |
505 | *BufferSize = Count;\r | |
506 | return EFI_TIMEOUT;\r | |
507 | }\r | |
508 | \r | |
509 | return EFI_SUCCESS;\r | |
510 | }\r | |
511 | \r | |
512 | /**\r | |
513 | Initialization for the Serial Io Protocol.\r | |
514 | \r | |
515 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
516 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
517 | \r | |
518 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
519 | @retval other Some error occurs when executing this entry point.\r | |
520 | \r | |
521 | **/\r | |
522 | EFI_STATUS\r | |
523 | EFIAPI\r | |
524 | SerialDxeInitialize (\r | |
525 | IN EFI_HANDLE ImageHandle,\r | |
526 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
527 | )\r | |
528 | {\r | |
529 | EFI_STATUS Status;\r | |
530 | \r | |
531 | mSerialIoMode.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);\r | |
532 | mSerialIoMode.DataBits = (UINT32) PcdGet8 (PcdUartDefaultDataBits);\r | |
533 | mSerialIoMode.Parity = (UINT32) PcdGet8 (PcdUartDefaultParity);\r | |
534 | mSerialIoMode.StopBits = (UINT32) PcdGet8 (PcdUartDefaultStopBits);\r | |
535 | mSerialIoMode.ReceiveFifoDepth = PcdGet16 (PcdUartDefaultReceiveFifoDepth);\r | |
536 | mSerialDevicePath.Uart.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);\r | |
537 | mSerialDevicePath.Uart.DataBits = PcdGet8 (PcdUartDefaultDataBits);\r | |
538 | mSerialDevicePath.Uart.Parity = PcdGet8 (PcdUartDefaultParity);\r | |
539 | mSerialDevicePath.Uart.StopBits = PcdGet8 (PcdUartDefaultStopBits);\r | |
540 | \r | |
541 | //\r | |
542 | // Issue a reset to initialize the Serial Port\r | |
543 | //\r | |
544 | Status = mSerialIoTemplate.Reset (&mSerialIoTemplate);\r | |
545 | if (EFI_ERROR (Status)) {\r | |
546 | return Status;\r | |
547 | }\r | |
548 | \r | |
549 | //\r | |
550 | // Make a new handle with Serial IO protocol and its device path on it.\r | |
551 | //\r | |
552 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
553 | &mSerialHandle,\r | |
554 | &gEfiSerialIoProtocolGuid, &mSerialIoTemplate,\r | |
555 | &gEfiDevicePathProtocolGuid, &mSerialDevicePath,\r | |
556 | NULL\r | |
557 | );\r | |
558 | ASSERT_EFI_ERROR (Status);\r | |
559 | \r | |
560 | return Status;\r | |
561 | }\r | |
562 | \r |