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637ff819 | 1 | /**@file\r |
2 | Serial driver for standard UARTS on an ISA bus.\r | |
3 | \r | |
366565e0 | 4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
5 | All rights reserved. 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 | |
637ff819 | 12 | \r |
13 | **/\r | |
14 | \r | |
15 | #include "Serial.h"\r | |
16 | \r | |
17 | //\r | |
18 | // ISA Serial Driver Global Variables\r | |
19 | //\r | |
20 | EFI_DRIVER_BINDING_PROTOCOL gSerialControllerDriver = {\r | |
21 | SerialControllerDriverSupported,\r | |
22 | SerialControllerDriverStart,\r | |
23 | SerialControllerDriverStop,\r | |
24 | 0xa,\r | |
25 | NULL,\r | |
26 | NULL\r | |
27 | };\r | |
28 | \r | |
29 | \r | |
6b88ceec A |
30 | SERIAL_DEV gSerialDevTempate = {\r |
31 | SERIAL_DEV_SIGNATURE,\r | |
32 | NULL,\r | |
33 | { // SerialIo\r | |
34 | SERIAL_IO_INTERFACE_REVISION,\r | |
35 | IsaSerialReset,\r | |
36 | IsaSerialSetAttributes,\r | |
37 | IsaSerialSetControl,\r | |
38 | IsaSerialGetControl,\r | |
39 | IsaSerialWrite,\r | |
40 | IsaSerialRead,\r | |
41 | NULL\r | |
42 | },\r | |
43 | { // SerialMode\r | |
44 | SERIAL_PORT_DEFAULT_CONTROL_MASK,\r | |
45 | SERIAL_PORT_DEFAULT_TIMEOUT,\r | |
46 | FixedPcdGet64 (PcdUartDefaultBaudRate), // BaudRate\r | |
47 | SERIAL_PORT_DEFAULT_RECEIVE_FIFO_DEPTH,\r | |
48 | FixedPcdGet8 (PcdUartDefaultDataBits), // DataBits\r | |
49 | FixedPcdGet8 (PcdUartDefaultParity), // Parity\r | |
50 | FixedPcdGet8 (PcdUartDefaultStopBits) // StopBits\r | |
51 | },\r | |
52 | NULL,\r | |
53 | NULL,\r | |
54 | { // UartDevicePath\r | |
55 | {\r | |
56 | MESSAGING_DEVICE_PATH,\r | |
57 | MSG_UART_DP,\r | |
a02c7e15 | 58 | {\r |
59 | (UINT8) (sizeof (UART_DEVICE_PATH)),\r | |
60 | (UINT8) ((sizeof (UART_DEVICE_PATH)) >> 8)\r | |
61 | }\r | |
6b88ceec A |
62 | },\r |
63 | 0,\r | |
64 | FixedPcdGet64 (PcdUartDefaultBaudRate), \r | |
65 | FixedPcdGet8 (PcdUartDefaultDataBits),\r | |
66 | FixedPcdGet8 (PcdUartDefaultParity),\r | |
67 | FixedPcdGet8 (PcdUartDefaultStopBits)\r | |
68 | },\r | |
69 | NULL,\r | |
70 | 0, //BaseAddress\r | |
71 | {\r | |
72 | 0,\r | |
73 | 0,\r | |
74 | SERIAL_MAX_BUFFER_SIZE,\r | |
75 | { 0 }\r | |
76 | },\r | |
77 | {\r | |
78 | 0,\r | |
79 | 0,\r | |
80 | SERIAL_MAX_BUFFER_SIZE,\r | |
81 | { 0 }\r | |
82 | },\r | |
83 | FALSE,\r | |
84 | FALSE,\r | |
85 | UART16550A,\r | |
86 | NULL\r | |
87 | };\r | |
88 | \r | |
637ff819 | 89 | /**\r |
90 | The user Entry Point for module IsaSerial. The user code starts with this function.\r | |
91 | \r | |
92 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
93 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
94 | \r | |
95 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
96 | @retval other Some error occurs when executing this entry point.\r | |
97 | \r | |
98 | **/\r | |
99 | EFI_STATUS\r | |
100 | EFIAPI\r | |
6b88ceec | 101 | InitializeIsaSerial (\r |
637ff819 | 102 | IN EFI_HANDLE ImageHandle,\r |
103 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
104 | )\r | |
105 | {\r | |
106 | EFI_STATUS Status;\r | |
107 | \r | |
108 | //\r | |
109 | // Install driver model protocol(s).\r | |
110 | //\r | |
111 | Status = EfiLibInstallAllDriverProtocols (\r | |
112 | ImageHandle,\r | |
113 | SystemTable,\r | |
114 | &gSerialControllerDriver,\r | |
115 | ImageHandle,\r | |
116 | &gIsaSerialComponentName,\r | |
117 | NULL,\r | |
118 | NULL\r | |
119 | );\r | |
120 | ASSERT_EFI_ERROR (Status);\r | |
121 | \r | |
122 | \r | |
123 | return Status;\r | |
124 | }\r | |
125 | \r | |
126 | \r | |
127 | EFI_STATUS\r | |
128 | EFIAPI\r | |
129 | SerialControllerDriverSupported (\r | |
130 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
131 | IN EFI_HANDLE Controller,\r | |
132 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
133 | )\r | |
134 | /*++\r | |
135 | \r | |
136 | Routine Description:\r | |
137 | \r | |
138 | Check to see if this driver supports the given controller\r | |
139 | \r | |
140 | Arguments:\r | |
141 | \r | |
142 | This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
143 | Controller - The handle of the controller to test.\r | |
144 | RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
145 | \r | |
146 | Returns:\r | |
147 | \r | |
148 | EFI_SUCCESS - This driver can support the given controller\r | |
149 | \r | |
150 | --*/\r | |
151 | {\r | |
152 | EFI_STATUS Status;\r | |
153 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
154 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
155 | UART_DEVICE_PATH UartNode;\r | |
156 | \r | |
157 | //\r | |
158 | // Ignore the RemainingDevicePath\r | |
159 | //\r | |
160 | //\r | |
161 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
162 | //\r | |
163 | Status = gBS->OpenProtocol (\r | |
164 | Controller,\r | |
165 | &gEfiDevicePathProtocolGuid,\r | |
166 | (VOID **) &ParentDevicePath,\r | |
167 | This->DriverBindingHandle,\r | |
168 | Controller,\r | |
169 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
170 | );\r | |
171 | if (Status == EFI_ALREADY_STARTED) {\r | |
172 | return EFI_SUCCESS;\r | |
173 | }\r | |
174 | \r | |
175 | if (EFI_ERROR (Status)) {\r | |
176 | return Status;\r | |
177 | }\r | |
178 | \r | |
179 | gBS->CloseProtocol (\r | |
180 | Controller,\r | |
181 | &gEfiDevicePathProtocolGuid,\r | |
182 | This->DriverBindingHandle,\r | |
183 | Controller\r | |
184 | );\r | |
185 | \r | |
186 | Status = gBS->OpenProtocol (\r | |
187 | Controller,\r | |
188 | &gEfiIsaIoProtocolGuid,\r | |
189 | (VOID **) &IsaIo,\r | |
190 | This->DriverBindingHandle,\r | |
191 | Controller,\r | |
192 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
193 | );\r | |
194 | \r | |
195 | if (Status == EFI_ALREADY_STARTED) {\r | |
196 | return EFI_SUCCESS;\r | |
197 | }\r | |
198 | \r | |
199 | if (EFI_ERROR (Status)) {\r | |
200 | return Status;\r | |
201 | }\r | |
202 | //\r | |
203 | // Use the ISA I/O Protocol to see if Controller is standard ISA UART that\r | |
204 | // can be managed by this driver.\r | |
205 | //\r | |
206 | Status = EFI_SUCCESS;\r | |
207 | if (IsaIo->ResourceList->Device.HID != EISA_PNP_ID (0x501)) {\r | |
208 | Status = EFI_UNSUPPORTED;\r | |
209 | goto Error;\r | |
210 | }\r | |
211 | //\r | |
212 | // Make sure RemainingDevicePath is valid\r | |
213 | //\r | |
214 | if (RemainingDevicePath != NULL) {\r | |
215 | Status = EFI_UNSUPPORTED;\r | |
216 | CopyMem (\r | |
217 | &UartNode,\r | |
218 | (UART_DEVICE_PATH *) RemainingDevicePath,\r | |
219 | sizeof (UART_DEVICE_PATH)\r | |
220 | );\r | |
221 | if (UartNode.Header.Type != MESSAGING_DEVICE_PATH ||\r | |
222 | UartNode.Header.SubType != MSG_UART_DP ||\r | |
223 | sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &UartNode)\r | |
224 | ) {\r | |
225 | goto Error;\r | |
226 | }\r | |
227 | \r | |
228 | if (UartNode.BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {\r | |
229 | goto Error;\r | |
230 | }\r | |
231 | \r | |
232 | if (UartNode.Parity < NoParity || UartNode.Parity > SpaceParity) {\r | |
233 | goto Error;\r | |
234 | }\r | |
235 | \r | |
236 | if (UartNode.DataBits < 5 || UartNode.DataBits > 8) {\r | |
237 | goto Error;\r | |
238 | }\r | |
239 | \r | |
240 | if (UartNode.StopBits < OneStopBit || UartNode.StopBits > TwoStopBits) {\r | |
241 | goto Error;\r | |
242 | }\r | |
243 | \r | |
244 | if ((UartNode.DataBits == 5) && (UartNode.StopBits == TwoStopBits)) {\r | |
245 | goto Error;\r | |
246 | }\r | |
247 | \r | |
248 | if ((UartNode.DataBits >= 6) && (UartNode.DataBits <= 8) && (UartNode.StopBits == OneFiveStopBits)) {\r | |
249 | goto Error;\r | |
250 | }\r | |
251 | \r | |
252 | Status = EFI_SUCCESS;\r | |
253 | }\r | |
254 | \r | |
255 | Error:\r | |
256 | //\r | |
257 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
258 | //\r | |
259 | gBS->CloseProtocol (\r | |
260 | Controller,\r | |
261 | &gEfiIsaIoProtocolGuid,\r | |
262 | This->DriverBindingHandle,\r | |
263 | Controller\r | |
264 | );\r | |
265 | \r | |
266 | return Status;\r | |
267 | }\r | |
268 | \r | |
269 | EFI_STATUS\r | |
270 | EFIAPI\r | |
271 | SerialControllerDriverStart (\r | |
272 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
273 | IN EFI_HANDLE Controller,\r | |
274 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
275 | )\r | |
276 | /*++\r | |
277 | \r | |
278 | Routine Description:\r | |
279 | \r | |
280 | Start to management the controller passed in\r | |
281 | \r | |
282 | Arguments:\r | |
283 | \r | |
284 | This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
285 | Controller - The handle of the controller to test.\r | |
286 | RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
287 | \r | |
288 | Returns:\r | |
289 | \r | |
290 | EFI_SUCCESS - Driver is started successfully\r | |
291 | \r | |
292 | --*/\r | |
293 | {\r | |
294 | EFI_STATUS Status;\r | |
295 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
296 | SERIAL_DEV *SerialDevice;\r | |
297 | UINTN Index;\r | |
298 | UART_DEVICE_PATH Node;\r | |
299 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
300 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
301 | UINTN EntryCount;\r | |
302 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
303 | \r | |
304 | SerialDevice = NULL;\r | |
305 | //\r | |
306 | // Get the Parent Device Path\r | |
307 | //\r | |
308 | Status = gBS->OpenProtocol (\r | |
309 | Controller,\r | |
310 | &gEfiDevicePathProtocolGuid,\r | |
311 | (VOID **) &ParentDevicePath,\r | |
312 | This->DriverBindingHandle,\r | |
313 | Controller,\r | |
314 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
315 | );\r | |
316 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
317 | return Status;\r | |
318 | }\r | |
319 | //\r | |
320 | // Report status code enable the serial\r | |
321 | //\r | |
322 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
323 | EFI_PROGRESS_CODE,\r | |
324 | EFI_P_PC_ENABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
325 | ParentDevicePath\r | |
326 | );\r | |
327 | \r | |
328 | //\r | |
329 | // Grab the IO abstraction we need to get any work done\r | |
330 | //\r | |
331 | Status = gBS->OpenProtocol (\r | |
332 | Controller,\r | |
333 | &gEfiIsaIoProtocolGuid,\r | |
334 | (VOID **) &IsaIo,\r | |
335 | This->DriverBindingHandle,\r | |
336 | Controller,\r | |
337 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
338 | );\r | |
339 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
340 | goto Error;\r | |
341 | }\r | |
342 | \r | |
343 | if (Status == EFI_ALREADY_STARTED) {\r | |
344 | \r | |
345 | if (RemainingDevicePath == NULL) {\r | |
346 | return EFI_SUCCESS;\r | |
347 | }\r | |
348 | //\r | |
349 | // Make sure a child handle does not already exist. This driver can only\r | |
350 | // produce one child per serial port.\r | |
351 | //\r | |
352 | Status = gBS->OpenProtocolInformation (\r | |
353 | Controller,\r | |
354 | &gEfiIsaIoProtocolGuid,\r | |
355 | &OpenInfoBuffer,\r | |
356 | &EntryCount\r | |
357 | );\r | |
358 | if (EFI_ERROR (Status)) {\r | |
359 | return Status;\r | |
360 | }\r | |
361 | \r | |
362 | Status = EFI_ALREADY_STARTED;\r | |
363 | for (Index = 0; Index < EntryCount; Index++) {\r | |
364 | if (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {\r | |
365 | Status = gBS->OpenProtocol (\r | |
366 | OpenInfoBuffer[Index].ControllerHandle,\r | |
367 | &gEfiSerialIoProtocolGuid,\r | |
368 | (VOID **) &SerialIo,\r | |
369 | This->DriverBindingHandle,\r | |
370 | Controller,\r | |
371 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
372 | );\r | |
373 | if (!EFI_ERROR (Status)) {\r | |
374 | CopyMem (&Node, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r | |
375 | Status = SerialIo->SetAttributes (\r | |
376 | SerialIo,\r | |
377 | Node.BaudRate,\r | |
378 | SerialIo->Mode->ReceiveFifoDepth,\r | |
379 | SerialIo->Mode->Timeout,\r | |
380 | (EFI_PARITY_TYPE) Node.Parity,\r | |
381 | Node.DataBits,\r | |
382 | (EFI_STOP_BITS_TYPE) Node.StopBits\r | |
383 | );\r | |
384 | }\r | |
385 | break;\r | |
386 | }\r | |
387 | }\r | |
388 | \r | |
389 | gBS->FreePool (OpenInfoBuffer);\r | |
390 | return Status;\r | |
391 | }\r | |
392 | //\r | |
393 | // Initialize the serial device instance\r | |
394 | //\r | |
6b88ceec | 395 | SerialDevice = AllocateCopyPool (sizeof (SERIAL_DEV), &gSerialDevTempate);\r |
637ff819 | 396 | if (SerialDevice == NULL) {\r |
397 | Status = EFI_OUT_OF_RESOURCES;\r | |
398 | goto Error;\r | |
399 | }\r | |
400 | \r | |
6b88ceec | 401 | SerialDevice->SerialIo.Mode = &(SerialDevice->SerialMode);\r |
637ff819 | 402 | SerialDevice->IsaIo = IsaIo;\r |
403 | SerialDevice->ParentDevicePath = ParentDevicePath;\r | |
637ff819 | 404 | \r |
405 | ADD_SERIAL_NAME (SerialDevice, IsaIo);\r | |
406 | \r | |
407 | for (Index = 0; SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type != EfiIsaAcpiResourceEndOfList; Index++) {\r | |
408 | if (SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type == EfiIsaAcpiResourceIo) {\r | |
409 | SerialDevice->BaseAddress = (UINT16) SerialDevice->IsaIo->ResourceList->ResourceItem[Index].StartRange;\r | |
410 | }\r | |
411 | }\r | |
412 | //\r | |
413 | // Report status code the serial present\r | |
414 | //\r | |
415 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
416 | EFI_PROGRESS_CODE,\r | |
417 | EFI_P_PC_PRESENCE_DETECT | EFI_PERIPHERAL_SERIAL_PORT,\r | |
418 | ParentDevicePath\r | |
419 | );\r | |
420 | \r | |
421 | if (!IsaSerialPortPresent (SerialDevice)) {\r | |
422 | Status = EFI_DEVICE_ERROR;\r | |
423 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
424 | EFI_ERROR_CODE,\r | |
425 | EFI_P_EC_NOT_DETECTED | EFI_PERIPHERAL_SERIAL_PORT,\r | |
426 | ParentDevicePath\r | |
427 | );\r | |
428 | goto Error;\r | |
429 | }\r | |
430 | \r | |
637ff819 | 431 | if (RemainingDevicePath != NULL) {\r |
432 | //\r | |
433 | // Match the configuration of the RemainingDevicePath. IsHandleSupported()\r | |
434 | // already checked to make sure the RemainingDevicePath contains settings\r | |
435 | // that we can support.\r | |
436 | //\r | |
437 | CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r | |
438 | } else {\r | |
439 | //\r | |
6b88ceec A |
440 | // Use the values from the gSerialDevTempate as no remaining device path was\r |
441 | // passed in.\r | |
637ff819 | 442 | //\r |
637ff819 | 443 | }\r |
444 | //\r | |
445 | // Build the device path by appending the UART node to the ParentDevicePath\r | |
446 | // from the WinNtIo handle. The Uart setings are zero here, since\r | |
447 | // SetAttribute() will update them to match the current setings.\r | |
448 | //\r | |
449 | SerialDevice->DevicePath = AppendDevicePathNode (\r | |
450 | ParentDevicePath,\r | |
6b88ceec | 451 | (EFI_DEVICE_PATH_PROTOCOL *)&SerialDevice->UartDevicePath\r |
637ff819 | 452 | );\r |
637ff819 | 453 | if (SerialDevice->DevicePath == NULL) {\r |
454 | Status = EFI_DEVICE_ERROR;\r | |
455 | goto Error;\r | |
456 | }\r | |
6b88ceec | 457 | \r |
637ff819 | 458 | //\r |
459 | // Fill in Serial I/O Mode structure based on either the RemainingDevicePath or defaults.\r | |
460 | //\r | |
637ff819 | 461 | SerialDevice->SerialMode.BaudRate = SerialDevice->UartDevicePath.BaudRate;\r |
637ff819 | 462 | SerialDevice->SerialMode.DataBits = SerialDevice->UartDevicePath.DataBits;\r |
463 | SerialDevice->SerialMode.Parity = SerialDevice->UartDevicePath.Parity;\r | |
464 | SerialDevice->SerialMode.StopBits = SerialDevice->UartDevicePath.StopBits;\r | |
465 | \r | |
466 | //\r | |
467 | // Issue a reset to initialize the COM port\r | |
468 | //\r | |
469 | Status = SerialDevice->SerialIo.Reset (&SerialDevice->SerialIo);\r | |
470 | if (EFI_ERROR (Status)) {\r | |
471 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
472 | EFI_ERROR_CODE,\r | |
473 | EFI_P_EC_CONTROLLER_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
474 | ParentDevicePath\r | |
475 | );\r | |
476 | goto Error;\r | |
477 | }\r | |
478 | //\r | |
479 | // Install protocol interfaces for the serial device.\r | |
480 | //\r | |
481 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
482 | &SerialDevice->Handle,\r | |
483 | &gEfiDevicePathProtocolGuid,\r | |
484 | SerialDevice->DevicePath,\r | |
485 | &gEfiSerialIoProtocolGuid,\r | |
486 | &SerialDevice->SerialIo,\r | |
487 | NULL\r | |
488 | );\r | |
489 | if (EFI_ERROR (Status)) {\r | |
490 | goto Error;\r | |
491 | }\r | |
492 | //\r | |
493 | // Open For Child Device\r | |
494 | //\r | |
495 | Status = gBS->OpenProtocol (\r | |
496 | Controller,\r | |
497 | &gEfiIsaIoProtocolGuid,\r | |
498 | (VOID **) &IsaIo,\r | |
499 | This->DriverBindingHandle,\r | |
500 | SerialDevice->Handle,\r | |
501 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
502 | );\r | |
503 | \r | |
504 | Error:\r | |
505 | if (EFI_ERROR (Status)) {\r | |
506 | gBS->CloseProtocol (\r | |
507 | Controller,\r | |
508 | &gEfiDevicePathProtocolGuid,\r | |
509 | This->DriverBindingHandle,\r | |
510 | Controller\r | |
511 | );\r | |
512 | gBS->CloseProtocol (\r | |
513 | Controller,\r | |
514 | &gEfiIsaIoProtocolGuid,\r | |
515 | This->DriverBindingHandle,\r | |
516 | Controller\r | |
517 | );\r | |
518 | if (SerialDevice) {\r | |
519 | if (SerialDevice->DevicePath) {\r | |
520 | gBS->FreePool (SerialDevice->DevicePath);\r | |
521 | }\r | |
522 | \r | |
523 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
524 | gBS->FreePool (SerialDevice);\r | |
525 | }\r | |
526 | }\r | |
527 | \r | |
528 | return Status;\r | |
529 | }\r | |
530 | \r | |
531 | EFI_STATUS\r | |
532 | EFIAPI\r | |
533 | SerialControllerDriverStop (\r | |
534 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
535 | IN EFI_HANDLE Controller,\r | |
536 | IN UINTN NumberOfChildren,\r | |
537 | IN EFI_HANDLE *ChildHandleBuffer\r | |
538 | )\r | |
539 | /*++\r | |
540 | \r | |
541 | Routine Description:\r | |
542 | \r | |
543 | Disconnect this driver with the controller, uninstall related protocol instance\r | |
544 | \r | |
545 | Arguments:\r | |
546 | \r | |
547 | This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
548 | Controller - The handle of the controller to test.\r | |
549 | NumberOfChildren - Number of child device.\r | |
550 | RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
551 | \r | |
552 | Returns:\r | |
553 | \r | |
554 | EFI_SUCCESS - Operation successfully\r | |
555 | EFI_DEVICE_ERROR - Cannot stop the driver successfully\r | |
556 | \r | |
557 | --*/\r | |
558 | {\r | |
559 | EFI_STATUS Status;\r | |
560 | UINTN Index;\r | |
561 | BOOLEAN AllChildrenStopped;\r | |
562 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
563 | SERIAL_DEV *SerialDevice;\r | |
564 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
565 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
566 | \r | |
567 | Status = gBS->HandleProtocol (\r | |
568 | Controller,\r | |
569 | &gEfiDevicePathProtocolGuid,\r | |
570 | (VOID **) &DevicePath\r | |
571 | );\r | |
572 | \r | |
573 | //\r | |
574 | // Report the status code disable the serial\r | |
575 | //\r | |
576 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
577 | EFI_PROGRESS_CODE,\r | |
578 | EFI_P_PC_DISABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
579 | DevicePath\r | |
580 | );\r | |
581 | \r | |
582 | //\r | |
583 | // Complete all outstanding transactions to Controller.\r | |
584 | // Don't allow any new transaction to Controller to be started.\r | |
585 | //\r | |
586 | if (NumberOfChildren == 0) {\r | |
587 | //\r | |
588 | // Close the bus driver\r | |
589 | //\r | |
590 | Status = gBS->CloseProtocol (\r | |
591 | Controller,\r | |
592 | &gEfiIsaIoProtocolGuid,\r | |
593 | This->DriverBindingHandle,\r | |
594 | Controller\r | |
595 | );\r | |
596 | \r | |
597 | Status = gBS->CloseProtocol (\r | |
598 | Controller,\r | |
599 | &gEfiDevicePathProtocolGuid,\r | |
600 | This->DriverBindingHandle,\r | |
601 | Controller\r | |
602 | );\r | |
603 | return Status;\r | |
604 | }\r | |
605 | \r | |
606 | AllChildrenStopped = TRUE;\r | |
607 | \r | |
608 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
609 | \r | |
610 | Status = gBS->OpenProtocol (\r | |
611 | ChildHandleBuffer[Index],\r | |
612 | &gEfiSerialIoProtocolGuid,\r | |
613 | (VOID **) &SerialIo,\r | |
614 | This->DriverBindingHandle,\r | |
615 | Controller,\r | |
616 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
617 | );\r | |
618 | if (!EFI_ERROR (Status)) {\r | |
619 | \r | |
620 | SerialDevice = SERIAL_DEV_FROM_THIS (SerialIo);\r | |
621 | \r | |
622 | Status = gBS->CloseProtocol (\r | |
623 | Controller,\r | |
624 | &gEfiIsaIoProtocolGuid,\r | |
625 | This->DriverBindingHandle,\r | |
626 | ChildHandleBuffer[Index]\r | |
627 | );\r | |
628 | \r | |
629 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
630 | ChildHandleBuffer[Index],\r | |
631 | &gEfiDevicePathProtocolGuid,\r | |
632 | SerialDevice->DevicePath,\r | |
633 | &gEfiSerialIoProtocolGuid,\r | |
634 | &SerialDevice->SerialIo,\r | |
635 | NULL\r | |
636 | );\r | |
637 | if (EFI_ERROR (Status)) {\r | |
638 | gBS->OpenProtocol (\r | |
639 | Controller,\r | |
640 | &gEfiIsaIoProtocolGuid,\r | |
641 | (VOID **) &IsaIo,\r | |
642 | This->DriverBindingHandle,\r | |
643 | ChildHandleBuffer[Index],\r | |
644 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
645 | );\r | |
646 | } else {\r | |
647 | if (SerialDevice->DevicePath) {\r | |
648 | gBS->FreePool (SerialDevice->DevicePath);\r | |
649 | }\r | |
650 | \r | |
651 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
652 | gBS->FreePool (SerialDevice);\r | |
653 | }\r | |
654 | }\r | |
655 | \r | |
656 | if (EFI_ERROR (Status)) {\r | |
657 | AllChildrenStopped = FALSE;\r | |
658 | }\r | |
659 | }\r | |
660 | \r | |
661 | if (!AllChildrenStopped) {\r | |
662 | return EFI_DEVICE_ERROR;\r | |
663 | }\r | |
664 | \r | |
665 | return EFI_SUCCESS;\r | |
666 | }\r | |
667 | \r | |
668 | BOOLEAN\r | |
669 | IsaSerialFifoFull (\r | |
670 | IN SERIAL_DEV_FIFO *Fifo\r | |
671 | )\r | |
672 | /*++\r | |
673 | \r | |
674 | Routine Description:\r | |
675 | \r | |
676 | Detect whether specific FIFO is full or not\r | |
677 | \r | |
678 | Arguments:\r | |
679 | \r | |
680 | Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
681 | \r | |
682 | Returns:\r | |
683 | \r | |
684 | TRUE - the FIFO is full\r | |
685 | FALSE - the FIFO is not full\r | |
686 | \r | |
687 | --*/\r | |
688 | {\r | |
689 | if (Fifo->Surplus == 0) {\r | |
690 | return TRUE;\r | |
691 | }\r | |
692 | \r | |
693 | return FALSE;\r | |
694 | }\r | |
695 | \r | |
696 | BOOLEAN\r | |
697 | IsaSerialFifoEmpty (\r | |
698 | IN SERIAL_DEV_FIFO *Fifo\r | |
699 | )\r | |
700 | /*++\r | |
701 | \r | |
702 | Routine Description:\r | |
703 | \r | |
704 | Detect whether specific FIFO is empty or not\r | |
705 | \r | |
706 | Arguments:\r | |
707 | \r | |
708 | Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
709 | \r | |
710 | Returns:\r | |
711 | \r | |
712 | TRUE - the FIFO is empty\r | |
713 | FALSE - the FIFO is not empty\r | |
714 | \r | |
715 | --*/\r | |
716 | {\r | |
717 | if (Fifo->Surplus == SERIAL_MAX_BUFFER_SIZE) {\r | |
718 | return TRUE;\r | |
719 | }\r | |
720 | \r | |
721 | return FALSE;\r | |
722 | }\r | |
723 | \r | |
724 | EFI_STATUS\r | |
725 | IsaSerialFifoAdd (\r | |
726 | IN SERIAL_DEV_FIFO *Fifo,\r | |
727 | IN UINT8 Data\r | |
728 | )\r | |
729 | /*++\r | |
730 | \r | |
731 | Routine Description:\r | |
732 | \r | |
733 | Add data to specific FIFO\r | |
734 | \r | |
735 | Arguments:\r | |
736 | \r | |
737 | Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
738 | Data - the data added to FIFO\r | |
739 | \r | |
740 | Returns:\r | |
741 | \r | |
742 | EFI_SUCCESS - Add data to specific FIFO successfully\r | |
743 | EFI_OUT_OF_RESOURCE - Failed to add data because FIFO is already full\r | |
744 | \r | |
745 | --*/\r | |
746 | {\r | |
747 | //\r | |
748 | // if FIFO full can not add data\r | |
749 | //\r | |
750 | if (IsaSerialFifoFull (Fifo)) {\r | |
751 | return EFI_OUT_OF_RESOURCES;\r | |
752 | }\r | |
753 | //\r | |
754 | // FIFO is not full can add data\r | |
755 | //\r | |
756 | Fifo->Data[Fifo->Last] = Data;\r | |
757 | Fifo->Surplus--;\r | |
758 | Fifo->Last++;\r | |
759 | if (Fifo->Last == SERIAL_MAX_BUFFER_SIZE) {\r | |
760 | Fifo->Last = 0;\r | |
761 | }\r | |
762 | \r | |
763 | return EFI_SUCCESS;\r | |
764 | }\r | |
765 | \r | |
766 | EFI_STATUS\r | |
767 | IsaSerialFifoRemove (\r | |
768 | IN SERIAL_DEV_FIFO *Fifo,\r | |
769 | OUT UINT8 *Data\r | |
770 | )\r | |
771 | /*++\r | |
772 | \r | |
773 | Routine Description:\r | |
774 | \r | |
775 | Remove data from specific FIFO\r | |
776 | \r | |
777 | Arguments:\r | |
778 | \r | |
779 | Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
780 | Data - the data removed from FIFO\r | |
781 | \r | |
782 | Returns:\r | |
783 | EFI_SUCCESS - Remove data from specific FIFO successfully\r | |
784 | EFI_OUT_OF_RESOURCE - Failed to remove data because FIFO is empty\r | |
785 | \r | |
786 | --*/\r | |
787 | {\r | |
788 | //\r | |
789 | // if FIFO is empty, no data can remove\r | |
790 | //\r | |
791 | if (IsaSerialFifoEmpty (Fifo)) {\r | |
792 | return EFI_OUT_OF_RESOURCES;\r | |
793 | }\r | |
794 | //\r | |
795 | // FIFO is not empty, can remove data\r | |
796 | //\r | |
797 | *Data = Fifo->Data[Fifo->First];\r | |
798 | Fifo->Surplus++;\r | |
799 | Fifo->First++;\r | |
800 | if (Fifo->First == SERIAL_MAX_BUFFER_SIZE) {\r | |
801 | Fifo->First = 0;\r | |
802 | }\r | |
803 | \r | |
804 | return EFI_SUCCESS;\r | |
805 | }\r | |
806 | \r | |
807 | EFI_STATUS\r | |
808 | IsaSerialReceiveTransmit (\r | |
809 | IN SERIAL_DEV *SerialDevice\r | |
810 | )\r | |
811 | /*++\r | |
812 | \r | |
813 | Routine Description:\r | |
814 | \r | |
815 | Reads and writes all avaliable data.\r | |
816 | \r | |
817 | Arguments:\r | |
818 | \r | |
819 | SerialDevice - The device to flush\r | |
820 | \r | |
821 | Returns:\r | |
822 | \r | |
823 | EFI_SUCCESS - Data was read/written successfully.\r | |
824 | EFI_OUT_OF_RESOURCE - Failed because software receive FIFO is full. Note, when\r | |
825 | this happens, pending writes are not done.\r | |
826 | \r | |
827 | --*/\r | |
828 | {\r | |
829 | SERIAL_PORT_LSR Lsr;\r | |
830 | UINT8 Data;\r | |
831 | BOOLEAN ReceiveFifoFull;\r | |
832 | SERIAL_PORT_MSR Msr;\r | |
833 | SERIAL_PORT_MCR Mcr;\r | |
834 | UINTN TimeOut;\r | |
835 | \r | |
836 | Data = 0;\r | |
837 | \r | |
838 | //\r | |
839 | // Begin the read or write\r | |
840 | //\r | |
841 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
842 | do {\r | |
843 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
844 | if (!IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
845 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
846 | if (ReceiveFifoFull) {\r | |
847 | return EFI_OUT_OF_RESOURCES;\r | |
848 | }\r | |
849 | \r | |
850 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r | |
851 | }\r | |
852 | } while (!IsaSerialFifoEmpty (&SerialDevice->Transmit));\r | |
853 | } else {\r | |
854 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
855 | do {\r | |
856 | Lsr.Data = READ_LSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
857 | \r | |
858 | if (FeaturePcdGet (PcdNtEmulatorEnable)) {\r | |
859 | //\r | |
860 | // This is required for NT to avoid a forever-spin...\r | |
861 | // This would be better if READ_LSR was a polling operation\r | |
862 | // that would timeout.\r | |
863 | //\r | |
864 | Lsr.Bits.THRE = 1;\r | |
865 | }\r | |
866 | //\r | |
867 | // Flush incomming data to prevent a an overrun during a long write\r | |
868 | //\r | |
869 | if (Lsr.Bits.DR && !ReceiveFifoFull) {\r | |
870 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
871 | if (!ReceiveFifoFull) {\r | |
872 | if (Lsr.Bits.FIFOE || Lsr.Bits.OE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r | |
873 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
874 | EFI_ERROR_CODE,\r | |
875 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
876 | SerialDevice->DevicePath\r | |
877 | );\r | |
878 | if (Lsr.Bits.FIFOE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r | |
879 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
880 | continue;\r | |
881 | }\r | |
882 | }\r | |
883 | //\r | |
884 | // Make sure the receive data will not be missed, Assert DTR\r | |
885 | //\r | |
886 | if (SerialDevice->HardwareFlowControl) {\r | |
887 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
888 | Mcr.Bits.DTRC &= 0;\r | |
889 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
890 | }\r | |
891 | \r | |
892 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
893 | \r | |
894 | //\r | |
895 | // Deassert DTR\r | |
896 | //\r | |
897 | if (SerialDevice->HardwareFlowControl) {\r | |
898 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
899 | Mcr.Bits.DTRC |= 1;\r | |
900 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
901 | }\r | |
902 | \r | |
903 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r | |
904 | \r | |
905 | continue;\r | |
906 | } else {\r | |
907 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
908 | EFI_PROGRESS_CODE,\r | |
909 | EFI_P_SERIAL_PORT_PC_CLEAR_BUFFER | EFI_PERIPHERAL_SERIAL_PORT,\r | |
910 | SerialDevice->DevicePath\r | |
911 | );\r | |
912 | }\r | |
913 | }\r | |
914 | //\r | |
915 | // Do the write\r | |
916 | //\r | |
917 | if (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
918 | //\r | |
919 | // Make sure the transmit data will not be missed\r | |
920 | //\r | |
921 | if (SerialDevice->HardwareFlowControl) {\r | |
922 | //\r | |
923 | // Send RTS\r | |
924 | //\r | |
925 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
926 | Mcr.Bits.RTS |= 1;\r | |
927 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
928 | //\r | |
929 | // Wait for CTS\r | |
930 | //\r | |
931 | TimeOut = 0;\r | |
932 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
933 | while (!Msr.Bits.CTS) {\r | |
934 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
935 | TimeOut++;\r | |
936 | if (TimeOut > 5) {\r | |
937 | break;\r | |
938 | }\r | |
939 | \r | |
940 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
941 | }\r | |
942 | \r | |
943 | if (Msr.Bits.CTS) {\r | |
944 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
945 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
946 | }\r | |
947 | }\r | |
948 | //\r | |
949 | // write the data out\r | |
950 | //\r | |
951 | if (!SerialDevice->HardwareFlowControl) {\r | |
952 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
953 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
954 | }\r | |
955 | //\r | |
956 | // Make sure the transmit data will not be missed\r | |
957 | //\r | |
958 | if (SerialDevice->HardwareFlowControl) {\r | |
959 | //\r | |
960 | // Assert RTS\r | |
961 | //\r | |
962 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
963 | Mcr.Bits.RTS &= 0;\r | |
964 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
965 | }\r | |
966 | }\r | |
967 | } while (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit));\r | |
968 | }\r | |
969 | \r | |
970 | return EFI_SUCCESS;\r | |
971 | }\r | |
972 | //\r | |
973 | // Interface Functions\r | |
974 | //\r | |
975 | EFI_STATUS\r | |
976 | EFIAPI\r | |
977 | IsaSerialReset (\r | |
978 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
979 | )\r | |
980 | /*++\r | |
981 | \r | |
982 | Routine Description:\r | |
983 | \r | |
984 | Reset serial device\r | |
985 | \r | |
986 | Arguments:\r | |
987 | \r | |
988 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
989 | \r | |
990 | Returns:\r | |
991 | \r | |
992 | EFI_SUCCESS - Reset successfully\r | |
993 | EFI_DEVICE_ERROR - Failed to reset\r | |
994 | \r | |
995 | --*/\r | |
996 | {\r | |
997 | EFI_STATUS Status;\r | |
998 | SERIAL_DEV *SerialDevice;\r | |
999 | SERIAL_PORT_LCR Lcr;\r | |
1000 | SERIAL_PORT_IER Ier;\r | |
1001 | SERIAL_PORT_MCR Mcr;\r | |
1002 | SERIAL_PORT_FCR Fcr;\r | |
1003 | EFI_TPL Tpl;\r | |
1004 | \r | |
1005 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1006 | \r | |
1007 | //\r | |
1008 | // Report the status code reset the serial\r | |
1009 | //\r | |
1010 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1011 | EFI_PROGRESS_CODE,\r | |
1012 | EFI_P_PC_RESET | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1013 | SerialDevice->DevicePath\r | |
1014 | );\r | |
1015 | \r | |
1016 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1017 | \r | |
1018 | //\r | |
1019 | // Make sure DLAB is 0.\r | |
1020 | //\r | |
1021 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1022 | Lcr.Bits.DLAB = 0;\r | |
1023 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
1024 | \r | |
1025 | //\r | |
1026 | // Turn off all interrupts\r | |
1027 | //\r | |
1028 | Ier.Data = READ_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1029 | Ier.Bits.RAVIE = 0;\r | |
1030 | Ier.Bits.THEIE = 0;\r | |
1031 | Ier.Bits.RIE = 0;\r | |
1032 | Ier.Bits.MIE = 0;\r | |
1033 | WRITE_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress, Ier.Data);\r | |
1034 | \r | |
1035 | //\r | |
1036 | // Disable the FIFO.\r | |
1037 | //\r | |
1038 | Fcr.Bits.TRFIFOE = 0;\r | |
1039 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r | |
1040 | \r | |
1041 | //\r | |
1042 | // Turn off loopback and disable device interrupt.\r | |
1043 | //\r | |
1044 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1045 | Mcr.Bits.OUT1 = 0;\r | |
1046 | Mcr.Bits.OUT2 = 0;\r | |
1047 | Mcr.Bits.LME = 0;\r | |
1048 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1049 | \r | |
1050 | //\r | |
1051 | // Clear the scratch pad register\r | |
1052 | //\r | |
1053 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0);\r | |
1054 | \r | |
1055 | //\r | |
1056 | // Go set the current attributes\r | |
1057 | //\r | |
1058 | Status = This->SetAttributes (\r | |
1059 | This,\r | |
1060 | This->Mode->BaudRate,\r | |
1061 | This->Mode->ReceiveFifoDepth,\r | |
1062 | This->Mode->Timeout,\r | |
1063 | (EFI_PARITY_TYPE) This->Mode->Parity,\r | |
1064 | (UINT8) This->Mode->DataBits,\r | |
1065 | (EFI_STOP_BITS_TYPE) This->Mode->StopBits\r | |
1066 | );\r | |
1067 | \r | |
1068 | if (EFI_ERROR (Status)) {\r | |
1069 | gBS->RestoreTPL (Tpl);\r | |
1070 | return EFI_DEVICE_ERROR;\r | |
1071 | }\r | |
1072 | //\r | |
1073 | // Go set the current control bits\r | |
1074 | //\r | |
1075 | Status = This->SetControl (\r | |
1076 | This,\r | |
1077 | This->Mode->ControlMask\r | |
1078 | );\r | |
1079 | \r | |
1080 | if (EFI_ERROR (Status)) {\r | |
1081 | gBS->RestoreTPL (Tpl);\r | |
1082 | return EFI_DEVICE_ERROR;\r | |
1083 | }\r | |
1084 | //\r | |
1085 | // for 16550A enable FIFO, 16550 disable FIFO\r | |
1086 | //\r | |
1087 | Fcr.Bits.TRFIFOE = 1;\r | |
1088 | Fcr.Bits.RESETRF = 1;\r | |
1089 | Fcr.Bits.RESETTF = 1;\r | |
1090 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r | |
1091 | \r | |
1092 | //\r | |
1093 | // Reset the software FIFO\r | |
1094 | //\r | |
1095 | SerialDevice->Receive.First = 0;\r | |
1096 | SerialDevice->Receive.Last = 0;\r | |
1097 | SerialDevice->Receive.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1098 | SerialDevice->Transmit.First = 0;\r | |
1099 | SerialDevice->Transmit.Last = 0;\r | |
1100 | SerialDevice->Transmit.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1101 | \r | |
1102 | gBS->RestoreTPL (Tpl);\r | |
1103 | \r | |
1104 | //\r | |
1105 | // Device reset is complete\r | |
1106 | //\r | |
1107 | return EFI_SUCCESS;\r | |
1108 | }\r | |
1109 | \r | |
1110 | EFI_STATUS\r | |
1111 | EFIAPI\r | |
1112 | IsaSerialSetAttributes (\r | |
1113 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1114 | IN UINT64 BaudRate,\r | |
1115 | IN UINT32 ReceiveFifoDepth,\r | |
1116 | IN UINT32 Timeout,\r | |
1117 | IN EFI_PARITY_TYPE Parity,\r | |
1118 | IN UINT8 DataBits,\r | |
1119 | IN EFI_STOP_BITS_TYPE StopBits\r | |
1120 | )\r | |
1121 | /*++\r | |
1122 | \r | |
1123 | Routine Description:\r | |
1124 | \r | |
1125 | Set new attributes to a serial device\r | |
1126 | \r | |
1127 | Arguments:\r | |
1128 | \r | |
1129 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1130 | BaudRate - The baudrate of the serial device\r | |
1131 | ReceiveFifoDepth - The depth of receive FIFO buffer\r | |
1132 | Timeout - The request timeout for a single char\r | |
1133 | Parity - The type of parity used in serial device\r | |
1134 | DataBits - Number of databits used in serial device\r | |
1135 | StopBits - Number of stopbits used in serial device\r | |
1136 | \r | |
1137 | Returns:\r | |
1138 | \r | |
1139 | EFI_SUCCESS - The new attributes were set\r | |
1140 | EFI_INVALID_PARAMETERS - One or more attributes have an unsupported value\r | |
1141 | EFI_UNSUPPORTED - Data Bits can not set to 5 or 6\r | |
1142 | EFI_DEVICE_ERROR - The serial device is not functioning correctly (no return)\r | |
1143 | \r | |
1144 | --*/\r | |
1145 | {\r | |
1146 | EFI_STATUS Status;\r | |
1147 | SERIAL_DEV *SerialDevice;\r | |
1148 | UINT32 Divisor;\r | |
1149 | UINT32 Remained;\r | |
1150 | SERIAL_PORT_LCR Lcr;\r | |
1151 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r | |
1152 | EFI_TPL Tpl;\r | |
1153 | \r | |
1154 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1155 | \r | |
1156 | //\r | |
1157 | // Check for default settings and fill in actual values.\r | |
1158 | //\r | |
1159 | if (BaudRate == 0) {\r | |
6b88ceec | 1160 | BaudRate = FixedPcdGet64 (PcdUartDefaultBaudRate);\r |
637ff819 | 1161 | }\r |
1162 | \r | |
1163 | if (ReceiveFifoDepth == 0) {\r | |
1164 | ReceiveFifoDepth = SERIAL_PORT_DEFAULT_RECEIVE_FIFO_DEPTH;\r | |
1165 | }\r | |
1166 | \r | |
1167 | if (Timeout == 0) {\r | |
1168 | Timeout = SERIAL_PORT_DEFAULT_TIMEOUT;\r | |
1169 | }\r | |
1170 | \r | |
1171 | if (Parity == DefaultParity) {\r | |
6bee1632 | 1172 | Parity = (EFI_PARITY_TYPE)FixedPcdGet8 (PcdUartDefaultParity);\r |
637ff819 | 1173 | }\r |
1174 | \r | |
1175 | if (DataBits == 0) {\r | |
6b88ceec | 1176 | DataBits = FixedPcdGet8 (PcdUartDefaultDataBits);\r |
637ff819 | 1177 | }\r |
1178 | \r | |
1179 | if (StopBits == DefaultStopBits) {\r | |
6b88ceec | 1180 | StopBits = (EFI_STOP_BITS_TYPE) FixedPcdGet8 (PcdUartDefaultStopBits);\r |
637ff819 | 1181 | }\r |
1182 | //\r | |
1183 | // 5 and 6 data bits can not be verified on a 16550A UART\r | |
1184 | // Return EFI_INVALID_PARAMETER if an attempt is made to use these settings.\r | |
1185 | //\r | |
1186 | if ((DataBits == 5) || (DataBits == 6)) {\r | |
1187 | return EFI_INVALID_PARAMETER;\r | |
1188 | }\r | |
1189 | //\r | |
1190 | // Make sure all parameters are valid\r | |
1191 | //\r | |
1192 | if ((BaudRate > SERIAL_PORT_MAX_BAUD_RATE) || (BaudRate < SERIAL_PORT_MIN_BAUD_RATE)) {\r | |
1193 | return EFI_INVALID_PARAMETER;\r | |
1194 | }\r | |
1195 | //\r | |
1196 | // 50,75,110,134,150,300,600,1200,1800,2000,2400,3600,4800,7200,9600,19200,\r | |
1197 | // 38400,57600,115200\r | |
1198 | //\r | |
1199 | if (BaudRate < 75) {\r | |
1200 | BaudRate = 50;\r | |
1201 | } else if (BaudRate < 110) {\r | |
1202 | BaudRate = 75;\r | |
1203 | } else if (BaudRate < 134) {\r | |
1204 | BaudRate = 110;\r | |
1205 | } else if (BaudRate < 150) {\r | |
1206 | BaudRate = 134;\r | |
1207 | } else if (BaudRate < 300) {\r | |
1208 | BaudRate = 150;\r | |
1209 | } else if (BaudRate < 600) {\r | |
1210 | BaudRate = 300;\r | |
1211 | } else if (BaudRate < 1200) {\r | |
1212 | BaudRate = 600;\r | |
1213 | } else if (BaudRate < 1800) {\r | |
1214 | BaudRate = 1200;\r | |
1215 | } else if (BaudRate < 2000) {\r | |
1216 | BaudRate = 1800;\r | |
1217 | } else if (BaudRate < 2400) {\r | |
1218 | BaudRate = 2000;\r | |
1219 | } else if (BaudRate < 3600) {\r | |
1220 | BaudRate = 2400;\r | |
1221 | } else if (BaudRate < 4800) {\r | |
1222 | BaudRate = 3600;\r | |
1223 | } else if (BaudRate < 7200) {\r | |
1224 | BaudRate = 4800;\r | |
1225 | } else if (BaudRate < 9600) {\r | |
1226 | BaudRate = 7200;\r | |
1227 | } else if (BaudRate < 19200) {\r | |
1228 | BaudRate = 9600;\r | |
1229 | } else if (BaudRate < 38400) {\r | |
1230 | BaudRate = 19200;\r | |
1231 | } else if (BaudRate < 57600) {\r | |
1232 | BaudRate = 38400;\r | |
1233 | } else if (BaudRate < 115200) {\r | |
1234 | BaudRate = 57600;\r | |
1235 | } else if (BaudRate <= SERIAL_PORT_MAX_BAUD_RATE) {\r | |
1236 | BaudRate = 115200;\r | |
1237 | }\r | |
1238 | \r | |
1239 | if ((ReceiveFifoDepth < 1) || (ReceiveFifoDepth > SERIAL_PORT_MAX_RECEIVE_FIFO_DEPTH)) {\r | |
1240 | return EFI_INVALID_PARAMETER;\r | |
1241 | }\r | |
1242 | \r | |
1243 | if ((Timeout < SERIAL_PORT_MIN_TIMEOUT) || (Timeout > SERIAL_PORT_MAX_TIMEOUT)) {\r | |
1244 | return EFI_INVALID_PARAMETER;\r | |
1245 | }\r | |
1246 | \r | |
1247 | if ((Parity < NoParity) || (Parity > SpaceParity)) {\r | |
1248 | return EFI_INVALID_PARAMETER;\r | |
1249 | }\r | |
1250 | \r | |
1251 | if ((DataBits < 5) || (DataBits > 8)) {\r | |
1252 | return EFI_INVALID_PARAMETER;\r | |
1253 | }\r | |
1254 | \r | |
1255 | if ((StopBits < OneStopBit) || (StopBits > TwoStopBits)) {\r | |
1256 | return EFI_INVALID_PARAMETER;\r | |
1257 | }\r | |
1258 | //\r | |
1259 | // for DataBits = 5, StopBits can not set TwoStopBits\r | |
1260 | //\r | |
1261 | // if ((DataBits == 5) && (StopBits == TwoStopBits)) {\r | |
1262 | // return EFI_INVALID_PARAMETER;\r | |
1263 | // }\r | |
1264 | //\r | |
1265 | // for DataBits = 6,7,8, StopBits can not set OneFiveStopBits\r | |
1266 | //\r | |
1267 | if ((DataBits >= 6) && (DataBits <= 8) && (StopBits == OneFiveStopBits)) {\r | |
1268 | return EFI_INVALID_PARAMETER;\r | |
1269 | }\r | |
1270 | \r | |
1271 | //\r | |
1272 | // Compute divisor use to program the baud rate using a round determination\r | |
1273 | //\r | |
1274 | Divisor = (UINT32) DivU64x32Remainder (\r | |
1275 | SERIAL_PORT_INPUT_CLOCK,\r | |
1276 | ((UINT32) BaudRate * 16),\r | |
1277 | &Remained\r | |
1278 | );\r | |
1279 | if (Remained) {\r | |
1280 | Divisor += 1;\r | |
1281 | }\r | |
1282 | \r | |
1283 | if ((Divisor == 0) || (Divisor & 0xffff0000)) {\r | |
1284 | return EFI_INVALID_PARAMETER;\r | |
1285 | }\r | |
1286 | \r | |
1287 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1288 | \r | |
1289 | //\r | |
1290 | // Compute the actual baud rate that the serial port will be programmed for.\r | |
1291 | //\r | |
1292 | BaudRate = SERIAL_PORT_INPUT_CLOCK / Divisor / 16;\r | |
1293 | \r | |
1294 | //\r | |
1295 | // Put serial port on Divisor Latch Mode\r | |
1296 | //\r | |
1297 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1298 | Lcr.Bits.DLAB = 1;\r | |
1299 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
1300 | \r | |
1301 | //\r | |
1302 | // Write the divisor to the serial port\r | |
1303 | //\r | |
1304 | WRITE_DLL (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) (Divisor & 0xff));\r | |
1305 | WRITE_DLM (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) ((Divisor >> 8) & 0xff));\r | |
1306 | \r | |
1307 | //\r | |
1308 | // Put serial port back in normal mode and set remaining attributes.\r | |
1309 | //\r | |
1310 | Lcr.Bits.DLAB = 0;\r | |
1311 | \r | |
1312 | switch (Parity) {\r | |
1313 | case NoParity:\r | |
1314 | Lcr.Bits.PAREN = 0;\r | |
1315 | Lcr.Bits.EVENPAR = 0;\r | |
1316 | Lcr.Bits.STICPAR = 0;\r | |
1317 | break;\r | |
1318 | \r | |
1319 | case EvenParity:\r | |
1320 | Lcr.Bits.PAREN = 1;\r | |
1321 | Lcr.Bits.EVENPAR = 1;\r | |
1322 | Lcr.Bits.STICPAR = 0;\r | |
1323 | break;\r | |
1324 | \r | |
1325 | case OddParity:\r | |
1326 | Lcr.Bits.PAREN = 1;\r | |
1327 | Lcr.Bits.EVENPAR = 0;\r | |
1328 | Lcr.Bits.STICPAR = 0;\r | |
1329 | break;\r | |
1330 | \r | |
1331 | case SpaceParity:\r | |
1332 | Lcr.Bits.PAREN = 1;\r | |
1333 | Lcr.Bits.EVENPAR = 1;\r | |
1334 | Lcr.Bits.STICPAR = 1;\r | |
1335 | break;\r | |
1336 | \r | |
1337 | case MarkParity:\r | |
1338 | Lcr.Bits.PAREN = 1;\r | |
1339 | Lcr.Bits.EVENPAR = 0;\r | |
1340 | Lcr.Bits.STICPAR = 1;\r | |
1341 | break;\r | |
1342 | \r | |
1343 | default:\r | |
1344 | break;\r | |
1345 | }\r | |
1346 | \r | |
1347 | switch (StopBits) {\r | |
1348 | case OneStopBit:\r | |
1349 | Lcr.Bits.STOPB = 0;\r | |
1350 | break;\r | |
1351 | \r | |
1352 | case OneFiveStopBits:\r | |
1353 | case TwoStopBits:\r | |
1354 | Lcr.Bits.STOPB = 1;\r | |
1355 | break;\r | |
1356 | \r | |
1357 | default:\r | |
1358 | break;\r | |
1359 | }\r | |
1360 | //\r | |
1361 | // DataBits\r | |
1362 | //\r | |
1363 | Lcr.Bits.SERIALDB = (UINT8) ((DataBits - 5) & 0x03);\r | |
1364 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
1365 | \r | |
1366 | //\r | |
1367 | // Set the Serial I/O mode\r | |
1368 | //\r | |
1369 | This->Mode->BaudRate = BaudRate;\r | |
1370 | This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;\r | |
1371 | This->Mode->Timeout = Timeout;\r | |
1372 | This->Mode->Parity = Parity;\r | |
1373 | This->Mode->DataBits = DataBits;\r | |
1374 | This->Mode->StopBits = StopBits;\r | |
1375 | \r | |
1376 | //\r | |
1377 | // See if Device Path Node has actually changed\r | |
1378 | //\r | |
1379 | if (SerialDevice->UartDevicePath.BaudRate == BaudRate &&\r | |
1380 | SerialDevice->UartDevicePath.DataBits == DataBits &&\r | |
1381 | SerialDevice->UartDevicePath.Parity == Parity &&\r | |
1382 | SerialDevice->UartDevicePath.StopBits == StopBits\r | |
1383 | ) {\r | |
1384 | gBS->RestoreTPL (Tpl);\r | |
1385 | return EFI_SUCCESS;\r | |
1386 | }\r | |
1387 | //\r | |
1388 | // Update the device path\r | |
1389 | //\r | |
1390 | SerialDevice->UartDevicePath.BaudRate = BaudRate;\r | |
1391 | SerialDevice->UartDevicePath.DataBits = DataBits;\r | |
1392 | SerialDevice->UartDevicePath.Parity = (UINT8) Parity;\r | |
1393 | SerialDevice->UartDevicePath.StopBits = (UINT8) StopBits;\r | |
1394 | \r | |
1395 | NewDevicePath = AppendDevicePathNode (\r | |
1396 | SerialDevice->ParentDevicePath,\r | |
1397 | (EFI_DEVICE_PATH_PROTOCOL *) &SerialDevice->UartDevicePath\r | |
1398 | );\r | |
1399 | if (NewDevicePath == NULL) {\r | |
1400 | gBS->RestoreTPL (Tpl);\r | |
1401 | return EFI_DEVICE_ERROR;\r | |
1402 | }\r | |
1403 | \r | |
1404 | if (SerialDevice->Handle != NULL) {\r | |
1405 | Status = gBS->ReinstallProtocolInterface (\r | |
1406 | SerialDevice->Handle,\r | |
1407 | &gEfiDevicePathProtocolGuid,\r | |
1408 | SerialDevice->DevicePath,\r | |
1409 | NewDevicePath\r | |
1410 | );\r | |
1411 | if (EFI_ERROR (Status)) {\r | |
1412 | gBS->RestoreTPL (Tpl);\r | |
1413 | return Status;\r | |
1414 | }\r | |
1415 | }\r | |
1416 | \r | |
1417 | if (SerialDevice->DevicePath) {\r | |
1418 | gBS->FreePool (SerialDevice->DevicePath);\r | |
1419 | }\r | |
1420 | \r | |
1421 | SerialDevice->DevicePath = NewDevicePath;\r | |
1422 | \r | |
1423 | gBS->RestoreTPL (Tpl);\r | |
1424 | \r | |
1425 | return EFI_SUCCESS;\r | |
1426 | }\r | |
1427 | \r | |
1428 | EFI_STATUS\r | |
1429 | EFIAPI\r | |
1430 | IsaSerialSetControl (\r | |
1431 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1432 | IN UINT32 Control\r | |
1433 | )\r | |
1434 | /*++\r | |
1435 | \r | |
1436 | Routine Description:\r | |
1437 | \r | |
1438 | Set Control Bits\r | |
1439 | \r | |
1440 | Arguments:\r | |
1441 | \r | |
1442 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1443 | Control - Control bits that can be settable\r | |
1444 | \r | |
1445 | Returns:\r | |
1446 | \r | |
1447 | EFI_SUCCESS - New Control bits were set successfully\r | |
1448 | EFI_UNSUPPORTED - The Control bits wanted to set are not supported\r | |
1449 | \r | |
1450 | --*/\r | |
1451 | {\r | |
1452 | SERIAL_DEV *SerialDevice;\r | |
1453 | SERIAL_PORT_MCR Mcr;\r | |
1454 | EFI_TPL Tpl;\r | |
1455 | \r | |
1456 | //\r | |
1457 | // The control bits that can be set are :\r | |
1458 | // EFI_SERIAL_DATA_TERMINAL_READY: 0x0001 // WO\r | |
1459 | // EFI_SERIAL_REQUEST_TO_SEND: 0x0002 // WO\r | |
1460 | // EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE: 0x1000 // RW\r | |
1461 | // EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE: 0x2000 // RW\r | |
1462 | //\r | |
1463 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1464 | \r | |
1465 | //\r | |
1466 | // first determine the parameter is invalid\r | |
1467 | //\r | |
1468 | if (Control & 0xffff8ffc) {\r | |
1469 | return EFI_UNSUPPORTED;\r | |
1470 | }\r | |
1471 | \r | |
1472 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1473 | \r | |
1474 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1475 | Mcr.Bits.DTRC = 0;\r | |
1476 | Mcr.Bits.RTS = 0;\r | |
1477 | Mcr.Bits.LME = 0;\r | |
1478 | SerialDevice->SoftwareLoopbackEnable = FALSE;\r | |
1479 | SerialDevice->HardwareFlowControl = FALSE;\r | |
1480 | \r | |
1481 | if (Control & EFI_SERIAL_DATA_TERMINAL_READY) {\r | |
1482 | Mcr.Bits.DTRC = 1;\r | |
1483 | }\r | |
1484 | \r | |
1485 | if (Control & EFI_SERIAL_REQUEST_TO_SEND) {\r | |
1486 | Mcr.Bits.RTS = 1;\r | |
1487 | }\r | |
1488 | \r | |
1489 | if (Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r | |
1490 | Mcr.Bits.LME = 1;\r | |
1491 | }\r | |
1492 | \r | |
1493 | if (Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r | |
1494 | SerialDevice->HardwareFlowControl = TRUE;\r | |
1495 | }\r | |
1496 | \r | |
1497 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1498 | \r | |
1499 | if (Control & EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) {\r | |
1500 | SerialDevice->SoftwareLoopbackEnable = TRUE;\r | |
1501 | }\r | |
1502 | \r | |
1503 | gBS->RestoreTPL (Tpl);\r | |
1504 | \r | |
1505 | return EFI_SUCCESS;\r | |
1506 | }\r | |
1507 | \r | |
1508 | EFI_STATUS\r | |
1509 | EFIAPI\r | |
1510 | IsaSerialGetControl (\r | |
1511 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1512 | OUT UINT32 *Control\r | |
1513 | )\r | |
1514 | /*++\r | |
1515 | \r | |
1516 | Routine Description:\r | |
1517 | \r | |
1518 | Get ControlBits\r | |
1519 | \r | |
1520 | Arguments:\r | |
1521 | \r | |
1522 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1523 | Control - Control signals of the serial device\r | |
1524 | \r | |
1525 | Returns:\r | |
1526 | \r | |
1527 | EFI_SUCCESS - Get Control signals successfully\r | |
1528 | \r | |
1529 | --*/\r | |
1530 | {\r | |
1531 | SERIAL_DEV *SerialDevice;\r | |
1532 | SERIAL_PORT_MSR Msr;\r | |
1533 | SERIAL_PORT_MCR Mcr;\r | |
1534 | EFI_TPL Tpl;\r | |
1535 | \r | |
1536 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1537 | \r | |
1538 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1539 | \r | |
1540 | *Control = 0;\r | |
1541 | \r | |
1542 | //\r | |
1543 | // Read the Modem Status Register\r | |
1544 | //\r | |
1545 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1546 | \r | |
1547 | if (Msr.Bits.CTS) {\r | |
1548 | *Control |= EFI_SERIAL_CLEAR_TO_SEND;\r | |
1549 | }\r | |
1550 | \r | |
1551 | if (Msr.Bits.DSR) {\r | |
1552 | *Control |= EFI_SERIAL_DATA_SET_READY;\r | |
1553 | }\r | |
1554 | \r | |
1555 | if (Msr.Bits.RI) {\r | |
1556 | *Control |= EFI_SERIAL_RING_INDICATE;\r | |
1557 | }\r | |
1558 | \r | |
1559 | if (Msr.Bits.DCD) {\r | |
1560 | *Control |= EFI_SERIAL_CARRIER_DETECT;\r | |
1561 | }\r | |
1562 | //\r | |
1563 | // Read the Modem Control Register\r | |
1564 | //\r | |
1565 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1566 | \r | |
1567 | if (Mcr.Bits.DTRC) {\r | |
1568 | *Control |= EFI_SERIAL_DATA_TERMINAL_READY;\r | |
1569 | }\r | |
1570 | \r | |
1571 | if (Mcr.Bits.RTS) {\r | |
1572 | *Control |= EFI_SERIAL_REQUEST_TO_SEND;\r | |
1573 | }\r | |
1574 | \r | |
1575 | if (Mcr.Bits.LME) {\r | |
1576 | *Control |= EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE;\r | |
1577 | }\r | |
1578 | \r | |
1579 | if (SerialDevice->HardwareFlowControl) {\r | |
1580 | *Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
1581 | }\r | |
1582 | //\r | |
1583 | // See if the Transmit FIFO is empty\r | |
1584 | //\r | |
1585 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1586 | \r | |
1587 | if (IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1588 | *Control |= EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r | |
1589 | }\r | |
1590 | //\r | |
1591 | // See if the Receive FIFO is empty.\r | |
1592 | //\r | |
1593 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1594 | \r | |
1595 | if (IsaSerialFifoEmpty (&SerialDevice->Receive)) {\r | |
1596 | *Control |= EFI_SERIAL_INPUT_BUFFER_EMPTY;\r | |
1597 | }\r | |
1598 | \r | |
1599 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
1600 | *Control |= EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE;\r | |
1601 | }\r | |
1602 | \r | |
1603 | gBS->RestoreTPL (Tpl);\r | |
1604 | \r | |
1605 | return EFI_SUCCESS;\r | |
1606 | }\r | |
1607 | \r | |
1608 | EFI_STATUS\r | |
1609 | EFIAPI\r | |
1610 | IsaSerialWrite (\r | |
1611 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1612 | IN OUT UINTN *BufferSize,\r | |
1613 | IN VOID *Buffer\r | |
1614 | )\r | |
1615 | /*++\r | |
1616 | \r | |
1617 | Routine Description:\r | |
1618 | \r | |
1619 | Write the specified number of bytes to serial device\r | |
1620 | \r | |
1621 | Arguments:\r | |
1622 | \r | |
1623 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1624 | BufferSize - On input the size of Buffer, on output the amount of\r | |
1625 | data actually written\r | |
1626 | Buffer - The buffer of data to write\r | |
1627 | \r | |
1628 | Returns:\r | |
1629 | \r | |
1630 | EFI_SUCCESS - The data were written successfully\r | |
1631 | EFI_DEVICE_ERROR - The device reported an error\r | |
1632 | EFI_TIMEOUT - The write operation was stopped due to timeout\r | |
1633 | \r | |
1634 | --*/\r | |
1635 | {\r | |
1636 | SERIAL_DEV *SerialDevice;\r | |
1637 | UINT8 *CharBuffer;\r | |
1638 | UINT32 Index;\r | |
1639 | UINTN Elapsed;\r | |
1640 | UINTN ActualWrite;\r | |
1641 | EFI_TPL Tpl;\r | |
1642 | \r | |
1643 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1644 | Elapsed = 0;\r | |
1645 | ActualWrite = 0;\r | |
1646 | \r | |
1647 | if (*BufferSize == 0) {\r | |
1648 | return EFI_SUCCESS;\r | |
1649 | }\r | |
1650 | \r | |
1651 | if (!Buffer) {\r | |
1652 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1653 | EFI_ERROR_CODE,\r | |
1654 | EFI_P_EC_OUTPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1655 | SerialDevice->DevicePath\r | |
1656 | );\r | |
1657 | \r | |
1658 | return EFI_DEVICE_ERROR;\r | |
1659 | }\r | |
1660 | \r | |
1661 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1662 | \r | |
1663 | CharBuffer = (UINT8 *) Buffer;\r | |
1664 | \r | |
1665 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1666 | IsaSerialFifoAdd (&SerialDevice->Transmit, CharBuffer[Index]);\r | |
1667 | \r | |
1668 | while (IsaSerialReceiveTransmit (SerialDevice) != EFI_SUCCESS || !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1669 | //\r | |
1670 | // Unsuccessful write so check if timeout has expired, if not,\r | |
1671 | // stall for a bit, increment time elapsed, and try again\r | |
1672 | //\r | |
1673 | if (Elapsed >= This->Mode->Timeout) {\r | |
1674 | *BufferSize = ActualWrite;\r | |
1675 | gBS->RestoreTPL (Tpl);\r | |
1676 | return EFI_TIMEOUT;\r | |
1677 | }\r | |
1678 | \r | |
1679 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1680 | \r | |
1681 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1682 | }\r | |
1683 | \r | |
1684 | ActualWrite++;\r | |
1685 | //\r | |
1686 | // Successful write so reset timeout\r | |
1687 | //\r | |
1688 | Elapsed = 0;\r | |
1689 | }\r | |
1690 | \r | |
1691 | gBS->RestoreTPL (Tpl);\r | |
1692 | \r | |
1693 | return EFI_SUCCESS;\r | |
1694 | }\r | |
1695 | \r | |
1696 | EFI_STATUS\r | |
1697 | EFIAPI\r | |
1698 | IsaSerialRead (\r | |
1699 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1700 | IN OUT UINTN *BufferSize,\r | |
1701 | OUT VOID *Buffer\r | |
1702 | )\r | |
1703 | /*++\r | |
1704 | \r | |
1705 | Routine Description:\r | |
1706 | \r | |
1707 | Read the specified number of bytes from serial device\r | |
1708 | \r | |
1709 | Arguments:\r | |
1710 | \r | |
1711 | This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1712 | BufferSize - On input the size of Buffer, on output the amount of\r | |
1713 | data returned in buffer\r | |
1714 | Buffer - The buffer to return the data into\r | |
1715 | \r | |
1716 | Returns:\r | |
1717 | \r | |
1718 | EFI_SUCCESS - The data were read successfully\r | |
1719 | EFI_DEVICE_ERROR - The device reported an error\r | |
1720 | EFI_TIMEOUT - The read operation was stopped due to timeout\r | |
1721 | \r | |
1722 | --*/\r | |
1723 | {\r | |
1724 | SERIAL_DEV *SerialDevice;\r | |
1725 | UINT32 Index;\r | |
1726 | UINT8 *CharBuffer;\r | |
1727 | UINTN Elapsed;\r | |
1728 | EFI_STATUS Status;\r | |
1729 | EFI_TPL Tpl;\r | |
1730 | \r | |
1731 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1732 | Elapsed = 0;\r | |
1733 | \r | |
1734 | if (*BufferSize == 0) {\r | |
1735 | return EFI_SUCCESS;\r | |
1736 | }\r | |
1737 | \r | |
1738 | if (!Buffer) {\r | |
1739 | return EFI_DEVICE_ERROR;\r | |
1740 | }\r | |
1741 | \r | |
1742 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1743 | \r | |
1744 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1745 | \r | |
1746 | if (EFI_ERROR (Status)) {\r | |
1747 | *BufferSize = 0;\r | |
1748 | \r | |
1749 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1750 | EFI_ERROR_CODE,\r | |
1751 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1752 | SerialDevice->DevicePath\r | |
1753 | );\r | |
1754 | \r | |
1755 | gBS->RestoreTPL (Tpl);\r | |
1756 | \r | |
1757 | return EFI_DEVICE_ERROR;\r | |
1758 | }\r | |
1759 | \r | |
1760 | CharBuffer = (UINT8 *) Buffer;\r | |
1761 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1762 | while (IsaSerialFifoRemove (&SerialDevice->Receive, &(CharBuffer[Index])) != EFI_SUCCESS) {\r | |
1763 | //\r | |
1764 | // Unsuccessful read so check if timeout has expired, if not,\r | |
1765 | // stall for a bit, increment time elapsed, and try again\r | |
1766 | // Need this time out to get conspliter to work.\r | |
1767 | //\r | |
1768 | if (Elapsed >= This->Mode->Timeout) {\r | |
1769 | *BufferSize = Index;\r | |
1770 | gBS->RestoreTPL (Tpl);\r | |
1771 | return EFI_TIMEOUT;\r | |
1772 | }\r | |
1773 | \r | |
1774 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1775 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1776 | \r | |
1777 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1778 | if (Status == EFI_DEVICE_ERROR) {\r | |
1779 | *BufferSize = Index;\r | |
1780 | gBS->RestoreTPL (Tpl);\r | |
1781 | return EFI_DEVICE_ERROR;\r | |
1782 | }\r | |
1783 | }\r | |
1784 | //\r | |
1785 | // Successful read so reset timeout\r | |
1786 | //\r | |
1787 | Elapsed = 0;\r | |
1788 | }\r | |
1789 | \r | |
1790 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1791 | \r | |
1792 | gBS->RestoreTPL (Tpl);\r | |
1793 | \r | |
1794 | return EFI_SUCCESS;\r | |
1795 | }\r | |
1796 | \r | |
1797 | BOOLEAN\r | |
1798 | IsaSerialPortPresent (\r | |
1799 | IN SERIAL_DEV *SerialDevice\r | |
1800 | )\r | |
1801 | /*++\r | |
1802 | \r | |
1803 | Routine Description:\r | |
1804 | \r | |
1805 | Use scratchpad register to test if this serial port is present\r | |
1806 | \r | |
1807 | Arguments:\r | |
1808 | \r | |
1809 | SerialDevice - Pointer to serial device structure\r | |
1810 | \r | |
1811 | Returns:\r | |
1812 | \r | |
1813 | TRUE - The serial port is present\r | |
1814 | FALSE - The serial port is NOT present\r | |
1815 | \r | |
1816 | --*/\r | |
1817 | {\r | |
1818 | UINT8 Temp;\r | |
1819 | BOOLEAN Status;\r | |
1820 | \r | |
1821 | Status = TRUE;\r | |
1822 | \r | |
1823 | //\r | |
1824 | // Save SCR reg\r | |
1825 | //\r | |
1826 | Temp = READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1827 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0xAA);\r | |
1828 | \r | |
6b88ceec | 1829 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0xAA) {\r |
637ff819 | 1830 | if (!FeaturePcdGet (PcdNtEmulatorEnable)) {\r |
1831 | Status = FALSE;\r | |
1832 | }\r | |
1833 | }\r | |
1834 | \r | |
1835 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0x55);\r | |
1836 | \r | |
6b88ceec | 1837 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0x55) {\r |
637ff819 | 1838 | if (!FeaturePcdGet (PcdNtEmulatorEnable)) {\r |
1839 | Status = FALSE;\r | |
1840 | }\r | |
1841 | }\r | |
1842 | //\r | |
1843 | // Restore SCR\r | |
1844 | //\r | |
1845 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Temp);\r | |
1846 | return Status;\r | |
1847 | }\r | |
1848 | \r | |
1849 | UINT8\r | |
1850 | IsaSerialReadPort (\r | |
1851 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1852 | IN UINT16 BaseAddress,\r | |
1853 | IN UINT32 Offset\r | |
1854 | )\r | |
1855 | /*++\r | |
1856 | \r | |
1857 | Routine Description:\r | |
1858 | \r | |
1859 | Use IsaIo protocol to read serial port\r | |
1860 | \r | |
1861 | Arguments:\r | |
1862 | \r | |
1863 | IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r | |
1864 | BaseAddress - Serial port register group base address\r | |
1865 | Offset - Offset in register group\r | |
1866 | \r | |
1867 | Returns:\r | |
1868 | \r | |
1869 | Data read from serial port\r | |
1870 | \r | |
1871 | --*/\r | |
1872 | {\r | |
1873 | UINT8 Data;\r | |
1874 | \r | |
1875 | //\r | |
1876 | // Use IsaIo to access IO\r | |
1877 | //\r | |
1878 | IsaIo->Io.Read (\r | |
1879 | IsaIo,\r | |
1880 | EfiIsaIoWidthUint8,\r | |
1881 | BaseAddress + Offset,\r | |
1882 | 1,\r | |
1883 | &Data\r | |
1884 | );\r | |
1885 | return Data;\r | |
1886 | }\r | |
1887 | \r | |
1888 | VOID\r | |
1889 | IsaSerialWritePort (\r | |
1890 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1891 | IN UINT16 BaseAddress,\r | |
1892 | IN UINT32 Offset,\r | |
1893 | IN UINT8 Data\r | |
1894 | )\r | |
1895 | /*++\r | |
1896 | \r | |
1897 | Routine Description:\r | |
1898 | \r | |
1899 | Use IsaIo protocol to write serial port\r | |
1900 | \r | |
1901 | Arguments:\r | |
1902 | \r | |
1903 | IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r | |
1904 | BaseAddress - Serial port register group base address\r | |
1905 | Offset - Offset in register group\r | |
1906 | Data - data which is to be written to some serial port register\r | |
1907 | \r | |
1908 | Returns:\r | |
1909 | \r | |
1910 | None\r | |
1911 | \r | |
1912 | --*/\r | |
1913 | {\r | |
1914 | //\r | |
1915 | // Use IsaIo to access IO\r | |
1916 | //\r | |
1917 | IsaIo->Io.Write (\r | |
1918 | IsaIo,\r | |
1919 | EfiIsaIoWidthUint8,\r | |
1920 | BaseAddress + Offset,\r | |
1921 | 1,\r | |
1922 | &Data\r | |
1923 | );\r | |
1924 | }\r | |
1925 | \r |