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bf6b810f SZ |
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 | This program and the accompanying materials\r | |
9 | are licensed and made available under the terms and conditions of the BSD License\r | |
10 | which accompanies this distribution. The full text of the license may be found at\r | |
11 | http://opensource.org/licenses/bsd-license.php\r | |
12 | \r | |
13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
15 | \r | |
16 | **/\r | |
17 | \r | |
18 | #include <Library/UefiBootServicesTableLib.h>\r | |
19 | #include <Library/SerialPortLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/PcdLib.h>\r | |
22 | \r | |
23 | #include <Protocol/SerialIo.h>\r | |
24 | #include <Protocol/DevicePath.h>\r | |
25 | \r | |
26 | typedef struct {\r | |
27 | VENDOR_DEVICE_PATH Guid;\r | |
28 | UART_DEVICE_PATH Uart;\r | |
29 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
30 | } SERIAL_DEVICE_PATH;\r | |
31 | \r | |
32 | /**\r | |
33 | Reset the serial device.\r | |
34 | \r | |
35 | @param This Protocol instance pointer.\r | |
36 | \r | |
37 | @retval EFI_SUCCESS The device was reset.\r | |
38 | @retval EFI_DEVICE_ERROR The serial device could not be reset.\r | |
39 | \r | |
40 | **/\r | |
41 | EFI_STATUS\r | |
42 | EFIAPI\r | |
43 | SerialReset (\r | |
44 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
45 | );\r | |
46 | \r | |
47 | /**\r | |
48 | Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,\r | |
49 | data bits, and stop bits on a serial device.\r | |
50 | \r | |
51 | @param This Protocol instance pointer.\r | |
52 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the\r | |
53 | device's default interface speed.\r | |
54 | @param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
55 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
56 | the device's default FIFO depth.\r | |
57 | @param Timeout The requested time out for a single character in microseconds.\r | |
58 | This timeout applies to both the transmit and receive side of the\r | |
59 | interface. A Timeout value of 0 will use the device's default time\r | |
60 | out value.\r | |
61 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
62 | DefaultParity will use the device's default parity value.\r | |
63 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
64 | value of 0 will use the device's default data bit setting.\r | |
65 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
66 | value of DefaultStopBits will use the device's default number of\r | |
67 | stop bits.\r | |
68 | \r | |
13d378fc JG |
69 | @retval EFI_SUCCESS The device was reset.\r |
70 | @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r | |
71 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
bf6b810f SZ |
72 | \r |
73 | **/\r | |
74 | EFI_STATUS\r | |
75 | EFIAPI\r | |
76 | SerialSetAttributes (\r | |
77 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
78 | IN UINT64 BaudRate,\r | |
79 | IN UINT32 ReceiveFifoDepth,\r | |
80 | IN UINT32 Timeout,\r | |
81 | IN EFI_PARITY_TYPE Parity,\r | |
82 | IN UINT8 DataBits,\r | |
83 | IN EFI_STOP_BITS_TYPE StopBits\r | |
84 | );\r | |
85 | \r | |
86 | /**\r | |
87 | Set the control bits on a serial device\r | |
88 | \r | |
89 | @param This Protocol instance pointer.\r | |
90 | @param Control Set the bits of Control that are settable.\r | |
91 | \r | |
92 | @retval EFI_SUCCESS The new control bits were set on the serial device.\r | |
93 | @retval EFI_UNSUPPORTED The serial device does not support this operation.\r | |
94 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
95 | \r | |
96 | **/\r | |
97 | EFI_STATUS\r | |
98 | EFIAPI\r | |
99 | SerialSetControl (\r | |
100 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
101 | IN UINT32 Control\r | |
102 | );\r | |
103 | \r | |
104 | /**\r | |
105 | Retrieves the status of the control bits on a serial device\r | |
106 | \r | |
107 | @param This Protocol instance pointer.\r | |
108 | @param Control A pointer to return the current Control signals from the serial device.\r | |
109 | \r | |
110 | @retval EFI_SUCCESS The control bits were read from the serial device.\r | |
111 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
112 | \r | |
113 | **/\r | |
114 | EFI_STATUS\r | |
115 | EFIAPI\r | |
116 | SerialGetControl (\r | |
117 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
118 | OUT UINT32 *Control\r | |
119 | );\r | |
120 | \r | |
121 | /**\r | |
122 | Writes data to a serial device.\r | |
123 | \r | |
124 | @param This Protocol instance pointer.\r | |
125 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
126 | data actually written.\r | |
127 | @param Buffer The buffer of data to write\r | |
128 | \r | |
129 | @retval EFI_SUCCESS The data was written.\r | |
130 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
131 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
132 | \r | |
133 | **/\r | |
134 | EFI_STATUS\r | |
135 | EFIAPI\r | |
136 | SerialWrite (\r | |
137 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
138 | IN OUT UINTN *BufferSize,\r | |
139 | IN VOID *Buffer\r | |
140 | );\r | |
141 | \r | |
142 | /**\r | |
143 | Reads data from a serial device.\r | |
144 | \r | |
145 | @param This Protocol instance pointer.\r | |
146 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
147 | data returned in Buffer.\r | |
148 | @param Buffer The buffer to return the data into.\r | |
149 | \r | |
150 | @retval EFI_SUCCESS The data was read.\r | |
151 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
152 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
153 | \r | |
154 | **/\r | |
155 | EFI_STATUS\r | |
156 | EFIAPI\r | |
157 | SerialRead (\r | |
158 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
159 | IN OUT UINTN *BufferSize,\r | |
160 | OUT VOID *Buffer\r | |
161 | );\r | |
162 | \r | |
163 | EFI_HANDLE mSerialHandle = NULL;\r | |
164 | \r | |
165 | SERIAL_DEVICE_PATH mSerialDevicePath = {\r | |
166 | {\r | |
167 | { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0} },\r | |
168 | EFI_CALLER_ID_GUID // Use the driver's GUID\r | |
169 | },\r | |
170 | {\r | |
171 | { MESSAGING_DEVICE_PATH, MSG_UART_DP, { sizeof (UART_DEVICE_PATH), 0} },\r | |
172 | 0, // Reserved\r | |
173 | 0, // BaudRate\r | |
174 | 0, // DataBits\r | |
175 | 0, // Parity\r | |
176 | 0 // StopBits\r | |
177 | },\r | |
178 | { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }\r | |
179 | };\r | |
180 | \r | |
181 | //\r | |
182 | // Template used to initialize the Serial IO protocols.\r | |
183 | //\r | |
184 | EFI_SERIAL_IO_MODE mSerialIoMode = {\r | |
c0beed6d LE |
185 | //\r |
186 | // value field set in SerialDxeInitialize()?\r | |
187 | //--------- ------------------- -----------------------------\r | |
188 | 0, // ControlMask\r | |
ea012619 | 189 | 1000 * 1000, // Timeout\r |
c0beed6d LE |
190 | 0, // BaudRate yes\r |
191 | 1, // ReceiveFifoDepth\r | |
192 | 0, // DataBits yes\r | |
193 | 0, // Parity yes\r | |
194 | 0 // StopBits yes\r | |
bf6b810f SZ |
195 | };\r |
196 | \r | |
197 | EFI_SERIAL_IO_PROTOCOL mSerialIoTemplate = {\r | |
198 | SERIAL_IO_INTERFACE_REVISION,\r | |
199 | SerialReset,\r | |
200 | SerialSetAttributes,\r | |
201 | SerialSetControl,\r | |
202 | SerialGetControl,\r | |
203 | SerialWrite,\r | |
204 | SerialRead,\r | |
205 | &mSerialIoMode\r | |
206 | };\r | |
207 | \r | |
208 | /**\r | |
209 | Reset the serial device.\r | |
210 | \r | |
211 | @param This Protocol instance pointer.\r | |
212 | \r | |
213 | @retval EFI_SUCCESS The device was reset.\r | |
214 | @retval EFI_DEVICE_ERROR The serial device could not be reset.\r | |
215 | \r | |
216 | **/\r | |
217 | EFI_STATUS\r | |
218 | EFIAPI\r | |
219 | SerialReset (\r | |
220 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
221 | )\r | |
222 | {\r | |
223 | EFI_STATUS Status;\r | |
bf6b810f SZ |
224 | \r |
225 | Status = SerialPortInitialize ();\r | |
226 | if (EFI_ERROR (Status)) {\r | |
227 | return Status;\r | |
228 | }\r | |
229 | \r | |
230 | //\r | |
91cc526b | 231 | // Go set the current attributes\r |
bf6b810f | 232 | //\r |
91cc526b PB |
233 | Status = This->SetAttributes (\r |
234 | This,\r | |
235 | This->Mode->BaudRate,\r | |
236 | This->Mode->ReceiveFifoDepth,\r | |
237 | This->Mode->Timeout,\r | |
238 | (EFI_PARITY_TYPE) This->Mode->Parity,\r | |
239 | (UINT8) This->Mode->DataBits,\r | |
240 | (EFI_STOP_BITS_TYPE) This->Mode->StopBits\r | |
241 | );\r | |
7ce5af40 JG |
242 | \r |
243 | //\r | |
244 | // The serial device may not support some of the attributes. To prevent\r | |
245 | // later failure, always return EFI_SUCCESS when SetAttributes is returning\r | |
246 | // EFI_INVALID_PARAMETER.\r | |
247 | //\r | |
248 | if (Status == EFI_INVALID_PARAMETER) {\r | |
249 | return EFI_SUCCESS;\r | |
250 | }\r | |
bf6b810f SZ |
251 | \r |
252 | return Status;\r | |
253 | }\r | |
254 | \r | |
255 | /**\r | |
256 | Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,\r | |
257 | data bits, and stop bits on a serial device.\r | |
258 | \r | |
259 | @param This Protocol instance pointer.\r | |
260 | @param BaudRate The requested baud rate. A BaudRate value of 0 will use the the\r | |
261 | device's default interface speed.\r | |
262 | @param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the\r | |
263 | serial interface. A ReceiveFifoDepth value of 0 will use\r | |
264 | the device's default FIFO depth.\r | |
265 | @param Timeout The requested time out for a single character in microseconds.\r | |
266 | This timeout applies to both the transmit and receive side of the\r | |
267 | interface. A Timeout value of 0 will use the device's default time\r | |
268 | out value.\r | |
269 | @param Parity The type of parity to use on this serial device. A Parity value of\r | |
270 | DefaultParity will use the device's default parity value.\r | |
271 | @param DataBits The number of data bits to use on the serial device. A DataBits\r | |
272 | value of 0 will use the device's default data bit setting.\r | |
273 | @param StopBits The number of stop bits to use on this serial device. A StopBits\r | |
274 | value of DefaultStopBits will use the device's default number of\r | |
275 | stop bits.\r | |
276 | \r | |
13d378fc JG |
277 | @retval EFI_SUCCESS The device was reset.\r |
278 | @retval EFI_INVALID_PARAMETER One or more attributes has an unsupported value.\r | |
279 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
bf6b810f SZ |
280 | \r |
281 | **/\r | |
282 | EFI_STATUS\r | |
283 | EFIAPI\r | |
284 | SerialSetAttributes (\r | |
285 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
286 | IN UINT64 BaudRate,\r | |
287 | IN UINT32 ReceiveFifoDepth,\r | |
288 | IN UINT32 Timeout,\r | |
289 | IN EFI_PARITY_TYPE Parity,\r | |
290 | IN UINT8 DataBits,\r | |
291 | IN EFI_STOP_BITS_TYPE StopBits\r | |
292 | )\r | |
293 | {\r | |
a7fd8452 SZ |
294 | EFI_STATUS Status;\r |
295 | EFI_TPL Tpl;\r | |
296 | UINT64 OriginalBaudRate;\r | |
297 | UINT32 OriginalReceiveFifoDepth;\r | |
298 | UINT32 OriginalTimeout;\r | |
299 | EFI_PARITY_TYPE OriginalParity;\r | |
300 | UINT8 OriginalDataBits;\r | |
301 | EFI_STOP_BITS_TYPE OriginalStopBits;\r | |
bf6b810f | 302 | \r |
a7fd8452 SZ |
303 | //\r |
304 | // Preserve the original input values in case\r | |
305 | // SerialPortSetAttributes() updates the input/output\r | |
306 | // parameters even on error.\r | |
307 | //\r | |
308 | OriginalBaudRate = BaudRate;\r | |
309 | OriginalReceiveFifoDepth = ReceiveFifoDepth;\r | |
310 | OriginalTimeout = Timeout;\r | |
311 | OriginalParity = Parity;\r | |
312 | OriginalDataBits = DataBits;\r | |
313 | OriginalStopBits = StopBits;\r | |
bf6b810f SZ |
314 | Status = SerialPortSetAttributes (&BaudRate, &ReceiveFifoDepth, &Timeout, &Parity, &DataBits, &StopBits);\r |
315 | if (EFI_ERROR (Status)) {\r | |
a7fd8452 SZ |
316 | //\r |
317 | // If it is just to set Timeout value and unsupported is returned,\r | |
318 | // do not return error.\r | |
319 | //\r | |
320 | if ((Status == EFI_UNSUPPORTED) &&\r | |
321 | (This->Mode->Timeout != OriginalTimeout) &&\r | |
322 | (This->Mode->ReceiveFifoDepth == OriginalReceiveFifoDepth) &&\r | |
323 | (This->Mode->BaudRate == OriginalBaudRate) &&\r | |
324 | (This->Mode->DataBits == (UINT32) OriginalDataBits) &&\r | |
325 | (This->Mode->Parity == (UINT32) OriginalParity) &&\r | |
326 | (This->Mode->StopBits == (UINT32) OriginalStopBits)) {\r | |
327 | //\r | |
328 | // Restore to the original input values.\r | |
329 | //\r | |
330 | BaudRate = OriginalBaudRate;\r | |
331 | ReceiveFifoDepth = OriginalReceiveFifoDepth;\r | |
332 | Timeout = OriginalTimeout;\r | |
333 | Parity = OriginalParity;\r | |
334 | DataBits = OriginalDataBits;\r | |
335 | StopBits = OriginalStopBits;\r | |
336 | Status = EFI_SUCCESS;\r | |
13d378fc JG |
337 | } else if (Status == EFI_INVALID_PARAMETER || Status == EFI_UNSUPPORTED) {\r |
338 | return EFI_INVALID_PARAMETER;\r | |
a7fd8452 | 339 | } else {\r |
13d378fc | 340 | return EFI_DEVICE_ERROR;\r |
a7fd8452 | 341 | }\r |
bf6b810f SZ |
342 | }\r |
343 | \r | |
344 | //\r | |
345 | // Set the Serial I/O mode and update the device path\r | |
346 | //\r | |
347 | \r | |
348 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
349 | \r | |
350 | //\r | |
351 | // Set the Serial I/O mode\r | |
352 | //\r | |
353 | This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;\r | |
354 | This->Mode->Timeout = Timeout;\r | |
355 | This->Mode->BaudRate = BaudRate;\r | |
356 | This->Mode->DataBits = (UINT32) DataBits;\r | |
357 | This->Mode->Parity = (UINT32) Parity;\r | |
358 | This->Mode->StopBits = (UINT32) StopBits;\r | |
359 | \r | |
360 | //\r | |
361 | // Check if the device path has actually changed\r | |
362 | //\r | |
363 | if (mSerialDevicePath.Uart.BaudRate == BaudRate &&\r | |
364 | mSerialDevicePath.Uart.DataBits == DataBits &&\r | |
365 | mSerialDevicePath.Uart.Parity == (UINT8) Parity &&\r | |
366 | mSerialDevicePath.Uart.StopBits == (UINT8) StopBits\r | |
367 | ) {\r | |
368 | gBS->RestoreTPL (Tpl);\r | |
369 | return EFI_SUCCESS;\r | |
370 | }\r | |
371 | \r | |
372 | //\r | |
373 | // Update the device path\r | |
374 | //\r | |
375 | mSerialDevicePath.Uart.BaudRate = BaudRate;\r | |
376 | mSerialDevicePath.Uart.DataBits = DataBits;\r | |
377 | mSerialDevicePath.Uart.Parity = (UINT8) Parity;\r | |
378 | mSerialDevicePath.Uart.StopBits = (UINT8) StopBits;\r | |
379 | \r | |
380 | Status = gBS->ReinstallProtocolInterface (\r | |
381 | mSerialHandle,\r | |
382 | &gEfiDevicePathProtocolGuid,\r | |
383 | &mSerialDevicePath,\r | |
384 | &mSerialDevicePath\r | |
385 | );\r | |
386 | \r | |
387 | gBS->RestoreTPL (Tpl);\r | |
388 | \r | |
389 | return Status;\r | |
390 | }\r | |
391 | \r | |
392 | /**\r | |
393 | Set the control bits on a serial device\r | |
394 | \r | |
395 | @param This Protocol instance pointer.\r | |
396 | @param Control Set the bits of Control that are settable.\r | |
397 | \r | |
398 | @retval EFI_SUCCESS The new control bits were set on the serial device.\r | |
399 | @retval EFI_UNSUPPORTED The serial device does not support this operation.\r | |
400 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
401 | \r | |
402 | **/\r | |
403 | EFI_STATUS\r | |
404 | EFIAPI\r | |
405 | SerialSetControl (\r | |
406 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
407 | IN UINT32 Control\r | |
408 | )\r | |
409 | {\r | |
410 | return SerialPortSetControl (Control);\r | |
411 | }\r | |
412 | \r | |
413 | /**\r | |
414 | Retrieves the status of the control bits on a serial device\r | |
415 | \r | |
416 | @param This Protocol instance pointer.\r | |
417 | @param Control A pointer to return the current Control signals from the serial device.\r | |
418 | \r | |
419 | @retval EFI_SUCCESS The control bits were read from the serial device.\r | |
420 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly.\r | |
421 | \r | |
422 | **/\r | |
423 | EFI_STATUS\r | |
424 | EFIAPI\r | |
425 | SerialGetControl (\r | |
426 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
427 | OUT UINT32 *Control\r | |
428 | )\r | |
429 | {\r | |
430 | return SerialPortGetControl (Control);\r | |
431 | }\r | |
432 | \r | |
433 | /**\r | |
434 | Writes data to a serial device.\r | |
435 | \r | |
436 | @param This Protocol instance pointer.\r | |
437 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
438 | data actually written.\r | |
439 | @param Buffer The buffer of data to write\r | |
440 | \r | |
441 | @retval EFI_SUCCESS The data was written.\r | |
442 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
443 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
444 | \r | |
445 | **/\r | |
446 | EFI_STATUS\r | |
447 | EFIAPI\r | |
448 | SerialWrite (\r | |
449 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
450 | IN OUT UINTN *BufferSize,\r | |
451 | IN VOID *Buffer\r | |
452 | )\r | |
453 | {\r | |
454 | UINTN Count;\r | |
455 | \r | |
456 | Count = SerialPortWrite (Buffer, *BufferSize);\r | |
457 | \r | |
458 | if (Count != *BufferSize) {\r | |
459 | *BufferSize = Count;\r | |
460 | return EFI_TIMEOUT;\r | |
461 | }\r | |
462 | \r | |
463 | return EFI_SUCCESS;\r | |
464 | }\r | |
465 | \r | |
466 | /**\r | |
467 | Reads data from a serial device.\r | |
468 | \r | |
469 | @param This Protocol instance pointer.\r | |
470 | @param BufferSize On input, the size of the Buffer. On output, the amount of\r | |
471 | data returned in Buffer.\r | |
472 | @param Buffer The buffer to return the data into.\r | |
473 | \r | |
474 | @retval EFI_SUCCESS The data was read.\r | |
475 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
476 | @retval EFI_TIMEOUT The data write was stopped due to a timeout.\r | |
477 | \r | |
478 | **/\r | |
479 | EFI_STATUS\r | |
480 | EFIAPI\r | |
481 | SerialRead (\r | |
482 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
483 | IN OUT UINTN *BufferSize,\r | |
484 | OUT VOID *Buffer\r | |
485 | )\r | |
486 | {\r | |
487 | UINTN Count;\r | |
4cf3f37c | 488 | UINTN TimeOut;\r |
bf6b810f SZ |
489 | \r |
490 | Count = 0;\r | |
491 | \r | |
4cf3f37c SZ |
492 | while (Count < *BufferSize) {\r |
493 | TimeOut = 0;\r | |
494 | while (TimeOut < mSerialIoMode.Timeout) {\r | |
495 | if (SerialPortPoll ()) {\r | |
496 | break;\r | |
497 | }\r | |
498 | gBS->Stall (10);\r | |
499 | TimeOut += 10;\r | |
500 | }\r | |
501 | if (TimeOut >= mSerialIoMode.Timeout) {\r | |
502 | break;\r | |
503 | }\r | |
504 | SerialPortRead (Buffer, 1);\r | |
505 | Count++;\r | |
506 | Buffer = (VOID *) ((UINT8 *) Buffer + 1);\r | |
bf6b810f SZ |
507 | }\r |
508 | \r | |
509 | if (Count != *BufferSize) {\r | |
510 | *BufferSize = Count;\r | |
511 | return EFI_TIMEOUT;\r | |
512 | }\r | |
513 | \r | |
514 | return EFI_SUCCESS;\r | |
515 | }\r | |
516 | \r | |
517 | /**\r | |
518 | Initialization for the Serial Io Protocol.\r | |
519 | \r | |
520 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
521 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
522 | \r | |
523 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
524 | @retval other Some error occurs when executing this entry point.\r | |
525 | \r | |
526 | **/\r | |
527 | EFI_STATUS\r | |
528 | EFIAPI\r | |
529 | SerialDxeInitialize (\r | |
530 | IN EFI_HANDLE ImageHandle,\r | |
531 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
532 | )\r | |
533 | {\r | |
534 | EFI_STATUS Status;\r | |
535 | \r | |
bf6b810f SZ |
536 | mSerialIoMode.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);\r |
537 | mSerialIoMode.DataBits = (UINT32) PcdGet8 (PcdUartDefaultDataBits);\r | |
538 | mSerialIoMode.Parity = (UINT32) PcdGet8 (PcdUartDefaultParity);\r | |
539 | mSerialIoMode.StopBits = (UINT32) PcdGet8 (PcdUartDefaultStopBits);\r | |
f423d760 | 540 | mSerialIoMode.ReceiveFifoDepth = PcdGet16 (PcdUartDefaultReceiveFifoDepth);\r |
bf6b810f SZ |
541 | mSerialDevicePath.Uart.BaudRate = PcdGet64 (PcdUartDefaultBaudRate);\r |
542 | mSerialDevicePath.Uart.DataBits = PcdGet8 (PcdUartDefaultDataBits);\r | |
543 | mSerialDevicePath.Uart.Parity = PcdGet8 (PcdUartDefaultParity);\r | |
544 | mSerialDevicePath.Uart.StopBits = PcdGet8 (PcdUartDefaultStopBits);\r | |
545 | \r | |
91cc526b PB |
546 | //\r |
547 | // Issue a reset to initialize the Serial Port\r | |
548 | //\r | |
549 | Status = mSerialIoTemplate.Reset (&mSerialIoTemplate);\r | |
550 | if (EFI_ERROR (Status)) {\r | |
551 | return Status;\r | |
552 | }\r | |
553 | \r | |
bf6b810f SZ |
554 | //\r |
555 | // Make a new handle with Serial IO protocol and its device path on it.\r | |
556 | //\r | |
557 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
558 | &mSerialHandle,\r | |
559 | &gEfiSerialIoProtocolGuid, &mSerialIoTemplate,\r | |
560 | &gEfiDevicePathProtocolGuid, &mSerialDevicePath,\r | |
561 | NULL\r | |
562 | );\r | |
563 | ASSERT_EFI_ERROR (Status);\r | |
564 | \r | |
565 | return Status;\r | |
566 | }\r | |
567 | \r |