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1 | /** @file\r | |
2 | Top level C file for debugport driver. Contains initialization function.\r | |
3 | This driver layers on top of SerialIo.\r | |
4 | ALL CODE IN THE SERIALIO STACK MUST BE RE-ENTRANT AND CALLABLE FROM\r | |
5 | INTERRUPT CONTEXT\r | |
6 | \r | |
7 | Copyright (c) 2006 - 2009, Intel Corporation. <BR>\r | |
8 | All rights reserved. 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 "DebugPort.h"\r | |
19 | \r | |
20 | //\r | |
21 | // Globals\r | |
22 | //\r | |
23 | EFI_DRIVER_BINDING_PROTOCOL gDebugPortDriverBinding = {\r | |
24 | DebugPortSupported,\r | |
25 | DebugPortStart,\r | |
26 | DebugPortStop,\r | |
27 | DEBUGPORT_DRIVER_VERSION,\r | |
28 | NULL,\r | |
29 | NULL\r | |
30 | };\r | |
31 | \r | |
32 | DEBUGPORT_DEVICE mDebugPortDevice = {\r | |
33 | DEBUGPORT_DEVICE_SIGNATURE,\r | |
34 | (EFI_HANDLE) 0,\r | |
35 | (EFI_HANDLE) 0,\r | |
36 | (VOID *) NULL,\r | |
37 | (EFI_DEVICE_PATH_PROTOCOL *) NULL,\r | |
38 | {\r | |
39 | DebugPortReset,\r | |
40 | DebugPortRead,\r | |
41 | DebugPortWrite,\r | |
42 | DebugPortPoll\r | |
43 | },\r | |
44 | (EFI_HANDLE) 0,\r | |
45 | (EFI_SERIAL_IO_PROTOCOL *) NULL,\r | |
46 | DEBUGPORT_UART_DEFAULT_BAUDRATE,\r | |
47 | DEBUGPORT_UART_DEFAULT_FIFO_DEPTH,\r | |
48 | DEBUGPORT_UART_DEFAULT_TIMEOUT,\r | |
49 | (EFI_PARITY_TYPE) DEBUGPORT_UART_DEFAULT_PARITY,\r | |
50 | DEBUGPORT_UART_DEFAULT_DATA_BITS,\r | |
51 | (EFI_STOP_BITS_TYPE) DEBUGPORT_UART_DEFAULT_STOP_BITS\r | |
52 | };\r | |
53 | \r | |
54 | /**\r | |
55 | Local worker function to obtain device path information from DebugPort variable.\r | |
56 | \r | |
57 | Records requested settings in DebugPort device structure.\r | |
58 | \r | |
59 | **/\r | |
60 | VOID\r | |
61 | GetDebugPortVariable (\r | |
62 | VOID\r | |
63 | )\r | |
64 | {\r | |
65 | UINTN DataSize;\r | |
66 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
67 | EFI_STATUS Status;\r | |
68 | \r | |
69 | DataSize = 0;\r | |
70 | \r | |
71 | Status = gRT->GetVariable (\r | |
72 | (CHAR16 *) EFI_DEBUGPORT_VARIABLE_NAME,\r | |
73 | &gEfiDebugPortVariableGuid,\r | |
74 | NULL,\r | |
75 | &DataSize,\r | |
76 | mDebugPortDevice.DebugPortVariable\r | |
77 | );\r | |
78 | \r | |
79 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
80 | if (mDebugPortDevice.DebugPortVariable != NULL) {\r | |
81 | FreePool (mDebugPortDevice.DebugPortVariable);\r | |
82 | }\r | |
83 | \r | |
84 | mDebugPortDevice.DebugPortVariable = AllocatePool (DataSize);\r | |
85 | if (mDebugPortDevice.DebugPortVariable != NULL) {\r | |
86 | gRT->GetVariable (\r | |
87 | (CHAR16 *) EFI_DEBUGPORT_VARIABLE_NAME,\r | |
88 | &gEfiDebugPortVariableGuid,\r | |
89 | NULL,\r | |
90 | &DataSize,\r | |
91 | mDebugPortDevice.DebugPortVariable\r | |
92 | );\r | |
93 | DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) mDebugPortDevice.DebugPortVariable;\r | |
94 | while (!IsDevicePathEnd (DevicePath) && !IS_UART_DEVICEPATH (DevicePath)) {\r | |
95 | DevicePath = NextDevicePathNode (DevicePath);\r | |
96 | }\r | |
97 | \r | |
98 | if (IsDevicePathEnd (DevicePath)) {\r | |
99 | FreePool (mDebugPortDevice.DebugPortVariable);\r | |
100 | mDebugPortDevice.DebugPortVariable = NULL;\r | |
101 | } else {\r | |
102 | CopyMem (\r | |
103 | &mDebugPortDevice.BaudRate,\r | |
104 | &((UART_DEVICE_PATH *) DevicePath)->BaudRate,\r | |
105 | sizeof (((UART_DEVICE_PATH *) DevicePath)->BaudRate)\r | |
106 | );\r | |
107 | mDebugPortDevice.ReceiveFifoDepth = DEBUGPORT_UART_DEFAULT_FIFO_DEPTH;\r | |
108 | mDebugPortDevice.Timeout = DEBUGPORT_UART_DEFAULT_TIMEOUT;\r | |
109 | CopyMem (\r | |
110 | &mDebugPortDevice.Parity,\r | |
111 | &((UART_DEVICE_PATH *) DevicePath)->Parity,\r | |
112 | sizeof (((UART_DEVICE_PATH *) DevicePath)->Parity)\r | |
113 | );\r | |
114 | CopyMem (\r | |
115 | &mDebugPortDevice.DataBits,\r | |
116 | &((UART_DEVICE_PATH *) DevicePath)->DataBits,\r | |
117 | sizeof (((UART_DEVICE_PATH *) DevicePath)->DataBits)\r | |
118 | );\r | |
119 | CopyMem (\r | |
120 | &mDebugPortDevice.StopBits,\r | |
121 | &((UART_DEVICE_PATH *) DevicePath)->StopBits,\r | |
122 | sizeof (((UART_DEVICE_PATH *) DevicePath)->StopBits)\r | |
123 | );\r | |
124 | }\r | |
125 | }\r | |
126 | }\r | |
127 | }\r | |
128 | \r | |
129 | /**\r | |
130 | Debug Port Driver entry point.\r | |
131 | \r | |
132 | Reads DebugPort variable to determine what device and settings to use as the\r | |
133 | debug port. Binds exclusively to SerialIo. Reverts to defaults if no variable\r | |
134 | is found.\r | |
135 | \r | |
136 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
137 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
138 | \r | |
139 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
140 | @retval EFI_OUT_OF_RESOURCES Fails to allocate memory for device.\r | |
141 | @retval other Some error occurs when executing this entry point.\r | |
142 | \r | |
143 | **/\r | |
144 | EFI_STATUS\r | |
145 | EFIAPI\r | |
146 | InitializeDebugPortDriver (\r | |
147 | IN EFI_HANDLE ImageHandle,\r | |
148 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
149 | )\r | |
150 | {\r | |
151 | EFI_STATUS Status;\r | |
152 | \r | |
153 | //\r | |
154 | // Install driver model protocol(s).\r | |
155 | //\r | |
156 | Status = EfiLibInstallDriverBindingComponentName2 (\r | |
157 | ImageHandle,\r | |
158 | SystemTable,\r | |
159 | &gDebugPortDriverBinding,\r | |
160 | ImageHandle,\r | |
161 | &gDebugPortComponentName,\r | |
162 | &gDebugPortComponentName2\r | |
163 | );\r | |
164 | ASSERT_EFI_ERROR (Status);\r | |
165 | \r | |
166 | return EFI_SUCCESS;\r | |
167 | }\r | |
168 | \r | |
169 | /**\r | |
170 | Checks to see if there's not already a DebugPort interface somewhere.\r | |
171 | \r | |
172 | If there's a DEBUGPORT variable, the device path must match exactly. If there's\r | |
173 | no DEBUGPORT variable, then device path is not checked and does not matter.\r | |
174 | Checks to see that there's a serial io interface on the controller handle\r | |
175 | that can be bound BY_DRIVER | EXCLUSIVE.\r | |
176 | If all these tests succeed, then we return EFI_SUCCESS, else, EFI_UNSUPPORTED\r | |
177 | or other error returned by OpenProtocol.\r | |
178 | \r | |
179 | @param This Protocol instance pointer.\r | |
180 | @param ControllerHandle Handle of device to test.\r | |
181 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
182 | device to start.\r | |
183 | \r | |
184 | @retval EFI_SUCCESS This driver supports this device.\r | |
185 | @retval EFI_UNSUPPORTED Debug Port device is not supported.\r | |
186 | @retval EFI_OUT_OF_RESOURCES Fails to allocate memory for device.\r | |
187 | @retval others Some error occurs.\r | |
188 | \r | |
189 | **/\r | |
190 | EFI_STATUS\r | |
191 | EFIAPI\r | |
192 | DebugPortSupported (\r | |
193 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
194 | IN EFI_HANDLE ControllerHandle,\r | |
195 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
196 | )\r | |
197 | {\r | |
198 | EFI_STATUS Status;\r | |
199 | EFI_DEVICE_PATH_PROTOCOL *Dp1;\r | |
200 | EFI_DEVICE_PATH_PROTOCOL *Dp2;\r | |
201 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
202 | EFI_DEBUGPORT_PROTOCOL *DebugPortInterface;\r | |
203 | EFI_HANDLE TempHandle;\r | |
204 | \r | |
205 | //\r | |
206 | // Check to see that there's not a debugport protocol already published,\r | |
207 | // since only one standard UART serial port could be supported by this driver.\r | |
208 | //\r | |
209 | if (gBS->LocateProtocol (&gEfiDebugPortProtocolGuid, NULL, (VOID **) &DebugPortInterface) != EFI_NOT_FOUND) {\r | |
210 | return EFI_UNSUPPORTED;\r | |
211 | }\r | |
212 | //\r | |
213 | // Read DebugPort variable to determine debug port selection and parameters\r | |
214 | //\r | |
215 | GetDebugPortVariable ();\r | |
216 | \r | |
217 | if (mDebugPortDevice.DebugPortVariable != NULL) {\r | |
218 | //\r | |
219 | // There's a DEBUGPORT variable, so do LocateDevicePath and check to see if\r | |
220 | // the closest matching handle matches the controller handle, and if it does,\r | |
221 | // check to see that the remaining device path has the DebugPort GUIDed messaging\r | |
222 | // device path only. Otherwise, it's a mismatch and EFI_UNSUPPORTED is returned.\r | |
223 | //\r | |
224 | Dp1 = DuplicateDevicePath ((EFI_DEVICE_PATH_PROTOCOL *) mDebugPortDevice.DebugPortVariable);\r | |
225 | if (Dp1 == NULL) {\r | |
226 | return EFI_OUT_OF_RESOURCES;\r | |
227 | }\r | |
228 | \r | |
229 | Dp2 = Dp1;\r | |
230 | \r | |
231 | Status = gBS->LocateDevicePath (\r | |
232 | &gEfiSerialIoProtocolGuid,\r | |
233 | &Dp2,\r | |
234 | &TempHandle\r | |
235 | );\r | |
236 | \r | |
237 | if (Status == EFI_SUCCESS && TempHandle != ControllerHandle) {\r | |
238 | Status = EFI_UNSUPPORTED;\r | |
239 | }\r | |
240 | \r | |
241 | if (Status == EFI_SUCCESS &&\r | |
242 | (Dp2->Type != MESSAGING_DEVICE_PATH ||\r | |
243 | Dp2->SubType != MSG_VENDOR_DP ||\r | |
244 | *((UINT16 *) Dp2->Length) != sizeof (DEBUGPORT_DEVICE_PATH))) {\r | |
245 | \r | |
246 | Status = EFI_UNSUPPORTED;\r | |
247 | }\r | |
248 | \r | |
249 | if (Status == EFI_SUCCESS && !CompareGuid (&gEfiDebugPortDevicePathGuid, (GUID *) (Dp2 + 1))) {\r | |
250 | Status = EFI_UNSUPPORTED;\r | |
251 | }\r | |
252 | \r | |
253 | FreePool (Dp1);\r | |
254 | if (EFI_ERROR (Status)) {\r | |
255 | return Status;\r | |
256 | }\r | |
257 | }\r | |
258 | \r | |
259 | Status = gBS->OpenProtocol (\r | |
260 | ControllerHandle,\r | |
261 | &gEfiSerialIoProtocolGuid,\r | |
262 | (VOID **) &SerialIo,\r | |
263 | This->DriverBindingHandle,\r | |
264 | ControllerHandle,\r | |
265 | EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE\r | |
266 | );\r | |
267 | if (EFI_ERROR (Status)) {\r | |
268 | return Status;\r | |
269 | }\r | |
270 | \r | |
271 | gBS->CloseProtocol (\r | |
272 | ControllerHandle,\r | |
273 | &gEfiSerialIoProtocolGuid,\r | |
274 | This->DriverBindingHandle,\r | |
275 | ControllerHandle\r | |
276 | );\r | |
277 | \r | |
278 | return EFI_SUCCESS;\r | |
279 | }\r | |
280 | \r | |
281 | /**\r | |
282 | Binds exclusively to serial io on the controller handle, Produces DebugPort\r | |
283 | protocol and DevicePath on new handle.\r | |
284 | \r | |
285 | @param This Protocol instance pointer.\r | |
286 | @param ControllerHandle Handle of device to bind driver to.\r | |
287 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
288 | device to start.\r | |
289 | \r | |
290 | @retval EFI_SUCCESS This driver is added to ControllerHandle.\r | |
291 | @retval EFI_OUT_OF_RESOURCES Fails to allocate memory for device.\r | |
292 | @retval others Some error occurs.\r | |
293 | \r | |
294 | **/\r | |
295 | EFI_STATUS\r | |
296 | EFIAPI\r | |
297 | DebugPortStart (\r | |
298 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
299 | IN EFI_HANDLE ControllerHandle,\r | |
300 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
301 | )\r | |
302 | {\r | |
303 | EFI_STATUS Status;\r | |
304 | DEBUGPORT_DEVICE_PATH DebugPortDP;\r | |
305 | EFI_DEVICE_PATH_PROTOCOL EndDP;\r | |
306 | EFI_DEVICE_PATH_PROTOCOL *Dp1;\r | |
307 | \r | |
308 | Status = gBS->OpenProtocol (\r | |
309 | ControllerHandle,\r | |
310 | &gEfiSerialIoProtocolGuid,\r | |
311 | (VOID **) &mDebugPortDevice.SerialIoBinding,\r | |
312 | This->DriverBindingHandle,\r | |
313 | ControllerHandle,\r | |
314 | EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE\r | |
315 | );\r | |
316 | if (EFI_ERROR (Status)) {\r | |
317 | return Status;\r | |
318 | }\r | |
319 | \r | |
320 | mDebugPortDevice.SerialIoDeviceHandle = ControllerHandle;\r | |
321 | \r | |
322 | //\r | |
323 | // Initialize the Serial Io interface...\r | |
324 | //\r | |
325 | Status = mDebugPortDevice.SerialIoBinding->SetAttributes (\r | |
326 | mDebugPortDevice.SerialIoBinding,\r | |
327 | mDebugPortDevice.BaudRate,\r | |
328 | mDebugPortDevice.ReceiveFifoDepth,\r | |
329 | mDebugPortDevice.Timeout,\r | |
330 | mDebugPortDevice.Parity,\r | |
331 | mDebugPortDevice.DataBits,\r | |
332 | mDebugPortDevice.StopBits\r | |
333 | );\r | |
334 | if (EFI_ERROR (Status)) {\r | |
335 | mDebugPortDevice.BaudRate = 0;\r | |
336 | mDebugPortDevice.Parity = DefaultParity;\r | |
337 | mDebugPortDevice.DataBits = 0;\r | |
338 | mDebugPortDevice.StopBits = DefaultStopBits;\r | |
339 | mDebugPortDevice.ReceiveFifoDepth = 0;\r | |
340 | Status = mDebugPortDevice.SerialIoBinding->SetAttributes (\r | |
341 | mDebugPortDevice.SerialIoBinding,\r | |
342 | mDebugPortDevice.BaudRate,\r | |
343 | mDebugPortDevice.ReceiveFifoDepth,\r | |
344 | mDebugPortDevice.Timeout,\r | |
345 | mDebugPortDevice.Parity,\r | |
346 | mDebugPortDevice.DataBits,\r | |
347 | mDebugPortDevice.StopBits\r | |
348 | );\r | |
349 | if (EFI_ERROR (Status)) {\r | |
350 | gBS->CloseProtocol (\r | |
351 | ControllerHandle,\r | |
352 | &gEfiSerialIoProtocolGuid,\r | |
353 | This->DriverBindingHandle,\r | |
354 | ControllerHandle\r | |
355 | );\r | |
356 | return Status;\r | |
357 | }\r | |
358 | }\r | |
359 | \r | |
360 | mDebugPortDevice.SerialIoBinding->Reset (mDebugPortDevice.SerialIoBinding);\r | |
361 | \r | |
362 | //\r | |
363 | // Create device path instance for DebugPort\r | |
364 | //\r | |
365 | DebugPortDP.Header.Type = MESSAGING_DEVICE_PATH;\r | |
366 | DebugPortDP.Header.SubType = MSG_VENDOR_DP;\r | |
367 | SetDevicePathNodeLength (&(DebugPortDP.Header), sizeof (DebugPortDP));\r | |
368 | CopyGuid (&DebugPortDP.Guid, &gEfiDebugPortDevicePathGuid);\r | |
369 | \r | |
370 | Dp1 = DevicePathFromHandle (ControllerHandle);\r | |
371 | if (Dp1 == NULL) {\r | |
372 | Dp1 = &EndDP;\r | |
373 | SetDevicePathEndNode (Dp1);\r | |
374 | }\r | |
375 | \r | |
376 | mDebugPortDevice.DebugPortDevicePath = AppendDevicePathNode (Dp1, (EFI_DEVICE_PATH_PROTOCOL *) &DebugPortDP);\r | |
377 | if (mDebugPortDevice.DebugPortDevicePath == NULL) {\r | |
378 | return EFI_OUT_OF_RESOURCES;\r | |
379 | }\r | |
380 | //\r | |
381 | // Publish DebugPort and Device Path protocols\r | |
382 | //\r | |
383 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
384 | &mDebugPortDevice.DebugPortDeviceHandle,\r | |
385 | &gEfiDevicePathProtocolGuid,\r | |
386 | mDebugPortDevice.DebugPortDevicePath,\r | |
387 | &gEfiDebugPortProtocolGuid,\r | |
388 | &mDebugPortDevice.DebugPortInterface,\r | |
389 | NULL\r | |
390 | );\r | |
391 | \r | |
392 | if (EFI_ERROR (Status)) {\r | |
393 | gBS->CloseProtocol (\r | |
394 | ControllerHandle,\r | |
395 | &gEfiSerialIoProtocolGuid,\r | |
396 | This->DriverBindingHandle,\r | |
397 | ControllerHandle\r | |
398 | );\r | |
399 | return Status;\r | |
400 | }\r | |
401 | //\r | |
402 | // Connect debugport child to serial io\r | |
403 | //\r | |
404 | Status = gBS->OpenProtocol (\r | |
405 | ControllerHandle,\r | |
406 | &gEfiSerialIoProtocolGuid,\r | |
407 | (VOID **) &mDebugPortDevice.SerialIoBinding,\r | |
408 | This->DriverBindingHandle,\r | |
409 | mDebugPortDevice.DebugPortDeviceHandle,\r | |
410 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
411 | );\r | |
412 | \r | |
413 | if (EFI_ERROR (Status)) {\r | |
414 | gBS->CloseProtocol (\r | |
415 | ControllerHandle,\r | |
416 | &gEfiSerialIoProtocolGuid,\r | |
417 | This->DriverBindingHandle,\r | |
418 | ControllerHandle\r | |
419 | );\r | |
420 | return Status;\r | |
421 | }\r | |
422 | \r | |
423 | return EFI_SUCCESS;\r | |
424 | }\r | |
425 | \r | |
426 | /**\r | |
427 | Stop this driver on ControllerHandle by removing Serial IO protocol on\r | |
428 | the ControllerHandle.\r | |
429 | \r | |
430 | @param This Protocol instance pointer.\r | |
431 | @param ControllerHandle Handle of device to stop driver on\r | |
432 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
433 | children is zero stop the entire bus driver.\r | |
434 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
435 | \r | |
436 | @retval EFI_SUCCESS This driver is removed ControllerHandle.\r | |
437 | @retval other This driver was not removed from this device.\r | |
438 | \r | |
439 | **/\r | |
440 | EFI_STATUS\r | |
441 | EFIAPI\r | |
442 | DebugPortStop (\r | |
443 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
444 | IN EFI_HANDLE ControllerHandle,\r | |
445 | IN UINTN NumberOfChildren,\r | |
446 | IN EFI_HANDLE *ChildHandleBuffer\r | |
447 | )\r | |
448 | {\r | |
449 | EFI_STATUS Status;\r | |
450 | \r | |
451 | if (NumberOfChildren == 0) {\r | |
452 | //\r | |
453 | // Close the bus driver\r | |
454 | //\r | |
455 | gBS->CloseProtocol (\r | |
456 | ControllerHandle,\r | |
457 | &gEfiSerialIoProtocolGuid,\r | |
458 | This->DriverBindingHandle,\r | |
459 | ControllerHandle\r | |
460 | );\r | |
461 | \r | |
462 | mDebugPortDevice.SerialIoBinding = NULL;\r | |
463 | \r | |
464 | gBS->CloseProtocol (\r | |
465 | ControllerHandle,\r | |
466 | &gEfiDevicePathProtocolGuid,\r | |
467 | This->DriverBindingHandle,\r | |
468 | ControllerHandle\r | |
469 | );\r | |
470 | \r | |
471 | FreePool (mDebugPortDevice.DebugPortDevicePath);\r | |
472 | \r | |
473 | return EFI_SUCCESS;\r | |
474 | } else {\r | |
475 | //\r | |
476 | // Disconnect SerialIo child handle\r | |
477 | //\r | |
478 | Status = gBS->CloseProtocol (\r | |
479 | mDebugPortDevice.SerialIoDeviceHandle,\r | |
480 | &gEfiSerialIoProtocolGuid,\r | |
481 | This->DriverBindingHandle,\r | |
482 | mDebugPortDevice.DebugPortDeviceHandle\r | |
483 | );\r | |
484 | \r | |
485 | if (EFI_ERROR (Status)) {\r | |
486 | return Status;\r | |
487 | }\r | |
488 | //\r | |
489 | // Unpublish our protocols (DevicePath, DebugPort)\r | |
490 | //\r | |
491 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
492 | mDebugPortDevice.DebugPortDeviceHandle,\r | |
493 | &gEfiDevicePathProtocolGuid,\r | |
494 | mDebugPortDevice.DebugPortDevicePath,\r | |
495 | &gEfiDebugPortProtocolGuid,\r | |
496 | &mDebugPortDevice.DebugPortInterface,\r | |
497 | NULL\r | |
498 | );\r | |
499 | \r | |
500 | if (EFI_ERROR (Status)) {\r | |
501 | gBS->OpenProtocol (\r | |
502 | ControllerHandle,\r | |
503 | &gEfiSerialIoProtocolGuid,\r | |
504 | (VOID **) &mDebugPortDevice.SerialIoBinding,\r | |
505 | This->DriverBindingHandle,\r | |
506 | mDebugPortDevice.DebugPortDeviceHandle,\r | |
507 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
508 | );\r | |
509 | } else {\r | |
510 | mDebugPortDevice.DebugPortDeviceHandle = NULL;\r | |
511 | }\r | |
512 | }\r | |
513 | \r | |
514 | return Status;\r | |
515 | }\r | |
516 | \r | |
517 | /**\r | |
518 | DebugPort protocol member function. Calls SerialIo:GetControl to flush buffer.\r | |
519 | We cannot call SerialIo:SetAttributes because it uses pool services, which use\r | |
520 | locks, which affect TPL, so it's not interrupt context safe or re-entrant.\r | |
521 | SerialIo:Reset() calls SetAttributes, so it can't be used either.\r | |
522 | \r | |
523 | The port itself should be fine since it was set up during initialization.\r | |
524 | \r | |
525 | @param This Protocol instance pointer.\r | |
526 | \r | |
527 | @return EFI_SUCCESS Always.\r | |
528 | \r | |
529 | **/\r | |
530 | EFI_STATUS\r | |
531 | EFIAPI\r | |
532 | DebugPortReset (\r | |
533 | IN EFI_DEBUGPORT_PROTOCOL *This\r | |
534 | )\r | |
535 | {\r | |
536 | UINTN BufferSize;\r | |
537 | UINTN BitBucket;\r | |
538 | \r | |
539 | while (This->Poll (This) == EFI_SUCCESS) {\r | |
540 | BufferSize = 1;\r | |
541 | This->Read (This, 0, &BufferSize, &BitBucket);\r | |
542 | }\r | |
543 | \r | |
544 | return EFI_SUCCESS;\r | |
545 | }\r | |
546 | \r | |
547 | /**\r | |
548 | DebugPort protocol member function. Calls SerialIo:Read() after setting\r | |
549 | if it's different than the last SerialIo access.\r | |
550 | \r | |
551 | @param This Pointer to DebugPort protocol.\r | |
552 | @param Timeout Timeout value.\r | |
553 | @param BufferSize On input, the size of Buffer.\r | |
554 | On output, the amount of data actually written.\r | |
555 | @param Buffer Pointer to buffer to read.\r | |
556 | \r | |
557 | @retval EFI_SUCCESS\r | |
558 | @retval others\r | |
559 | \r | |
560 | **/\r | |
561 | EFI_STATUS\r | |
562 | EFIAPI\r | |
563 | DebugPortRead (\r | |
564 | IN EFI_DEBUGPORT_PROTOCOL *This,\r | |
565 | IN UINT32 Timeout,\r | |
566 | IN OUT UINTN *BufferSize,\r | |
567 | IN VOID *Buffer\r | |
568 | )\r | |
569 | {\r | |
570 | DEBUGPORT_DEVICE *DebugPortDevice;\r | |
571 | UINTN LocalBufferSize;\r | |
572 | EFI_STATUS Status;\r | |
573 | UINT8 *BufferPtr;\r | |
574 | \r | |
575 | DebugPortDevice = DEBUGPORT_DEVICE_FROM_THIS (This);\r | |
576 | BufferPtr = Buffer;\r | |
577 | LocalBufferSize = *BufferSize;\r | |
578 | \r | |
579 | do {\r | |
580 | Status = DebugPortDevice->SerialIoBinding->Read (\r | |
581 | DebugPortDevice->SerialIoBinding,\r | |
582 | &LocalBufferSize,\r | |
583 | BufferPtr\r | |
584 | );\r | |
585 | if (Status == EFI_TIMEOUT) {\r | |
586 | if (Timeout > DEBUGPORT_UART_DEFAULT_TIMEOUT) {\r | |
587 | Timeout -= DEBUGPORT_UART_DEFAULT_TIMEOUT;\r | |
588 | } else {\r | |
589 | Timeout = 0;\r | |
590 | }\r | |
591 | } else if (EFI_ERROR (Status)) {\r | |
592 | break;\r | |
593 | }\r | |
594 | \r | |
595 | BufferPtr += LocalBufferSize;\r | |
596 | LocalBufferSize = *BufferSize - (BufferPtr - (UINT8 *) Buffer);\r | |
597 | } while (LocalBufferSize != 0 && Timeout > 0);\r | |
598 | \r | |
599 | *BufferSize = (UINTN) (BufferPtr - (UINT8 *) Buffer);\r | |
600 | \r | |
601 | return Status;\r | |
602 | }\r | |
603 | \r | |
604 | /**\r | |
605 | DebugPort protocol member function. Calls SerialIo:Write() Writes 8 bytes at\r | |
606 | a time and does a GetControl between 8 byte writes to help insure reads are\r | |
607 | interspersed This is poor-man's flow control.\r | |
608 | \r | |
609 | @param This Pointer to DebugPort protocol.\r | |
610 | @param Timeout Timeout value.\r | |
611 | @param BufferSize On input, the size of Buffer.\r | |
612 | On output, the amount of data actually written.\r | |
613 | @param Buffer Pointer to buffer to read.\r | |
614 | \r | |
615 | @retval EFI_SUCCESS The data was written.\r | |
616 | @retval others Fails when writting datas to debug port device.\r | |
617 | \r | |
618 | **/\r | |
619 | EFI_STATUS\r | |
620 | EFIAPI\r | |
621 | DebugPortWrite (\r | |
622 | IN EFI_DEBUGPORT_PROTOCOL *This,\r | |
623 | IN UINT32 Timeout,\r | |
624 | IN OUT UINTN *BufferSize,\r | |
625 | OUT VOID *Buffer\r | |
626 | )\r | |
627 | {\r | |
628 | DEBUGPORT_DEVICE *DebugPortDevice;\r | |
629 | UINTN Position;\r | |
630 | UINTN WriteSize;\r | |
631 | EFI_STATUS Status;\r | |
632 | UINT32 SerialControl;\r | |
633 | \r | |
634 | Status = EFI_SUCCESS;\r | |
635 | DebugPortDevice = DEBUGPORT_DEVICE_FROM_THIS (This);\r | |
636 | \r | |
637 | WriteSize = 8;\r | |
638 | for (Position = 0; Position < *BufferSize && !EFI_ERROR (Status); Position += WriteSize) {\r | |
639 | DebugPortDevice->SerialIoBinding->GetControl (\r | |
640 | DebugPortDevice->SerialIoBinding,\r | |
641 | &SerialControl\r | |
642 | );\r | |
643 | if (*BufferSize - Position < 8) {\r | |
644 | WriteSize = *BufferSize - Position;\r | |
645 | }\r | |
646 | \r | |
647 | Status = DebugPortDevice->SerialIoBinding->Write (\r | |
648 | DebugPortDevice->SerialIoBinding,\r | |
649 | &WriteSize,\r | |
650 | &((UINT8 *) Buffer)[Position]\r | |
651 | );\r | |
652 | }\r | |
653 | \r | |
654 | *BufferSize = Position;\r | |
655 | return Status;\r | |
656 | }\r | |
657 | \r | |
658 | /**\r | |
659 | DebugPort protocol member function. Calls SerialIo:Write() after setting\r | |
660 | if it's different than the last SerialIo access.\r | |
661 | \r | |
662 | @param This Pointer to DebugPort protocol.\r | |
663 | \r | |
664 | @retval EFI_SUCCESS At least 1 character is ready to be read from\r | |
665 | the DebugPort interface.\r | |
666 | @retval EFI_NOT_READY There are no characters ready to read from the\r | |
667 | DebugPort interface\r | |
668 | @retval EFI_DEVICE_ERROR A hardware failure occured... (from SerialIo)\r | |
669 | \r | |
670 | **/\r | |
671 | EFI_STATUS\r | |
672 | EFIAPI\r | |
673 | DebugPortPoll (\r | |
674 | IN EFI_DEBUGPORT_PROTOCOL *This\r | |
675 | )\r | |
676 | {\r | |
677 | EFI_STATUS Status;\r | |
678 | UINT32 SerialControl;\r | |
679 | DEBUGPORT_DEVICE *DebugPortDevice;\r | |
680 | \r | |
681 | DebugPortDevice = DEBUGPORT_DEVICE_FROM_THIS (This);\r | |
682 | \r | |
683 | Status = DebugPortDevice->SerialIoBinding->GetControl (\r | |
684 | DebugPortDevice->SerialIoBinding,\r | |
685 | &SerialControl\r | |
686 | );\r | |
687 | \r | |
688 | if (!EFI_ERROR (Status)) {\r | |
689 | if ((SerialControl & EFI_SERIAL_INPUT_BUFFER_EMPTY) != 0) {\r | |
690 | Status = EFI_NOT_READY;\r | |
691 | } else {\r | |
692 | Status = EFI_SUCCESS;\r | |
693 | }\r | |
694 | }\r | |
695 | \r | |
696 | return Status;\r | |
697 | }\r | |
698 | \r | |
699 | /**\r | |
700 | Unload function that is registered in the LoadImage protocol. It un-installs\r | |
701 | protocols produced and deallocates pool used by the driver. Called by the core\r | |
702 | when unloading the driver.\r | |
703 | \r | |
704 | @param ImageHandle\r | |
705 | \r | |
706 | @retval EFI_SUCCESS Unload Debug Port driver successfully.\r | |
707 | @retval EFI_ABORTED Serial IO is still binding.\r | |
708 | \r | |
709 | **/\r | |
710 | EFI_STATUS\r | |
711 | EFIAPI\r | |
712 | ImageUnloadHandler (\r | |
713 | EFI_HANDLE ImageHandle\r | |
714 | )\r | |
715 | {\r | |
716 | if (mDebugPortDevice.SerialIoBinding != NULL) {\r | |
717 | return EFI_ABORTED;\r | |
718 | }\r | |
719 | \r | |
720 | //\r | |
721 | // Clean up allocations\r | |
722 | //\r | |
723 | if (mDebugPortDevice.DebugPortVariable != NULL) {\r | |
724 | FreePool (mDebugPortDevice.DebugPortVariable);\r | |
725 | }\r | |
726 | \r | |
727 | return EFI_SUCCESS;\r | |
728 | }\r |