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Commit | Line | Data |
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637ff819 | 1 | /**@file\r |
bcd70414 | 2 | Serial driver for standard UARTS on an ISA bus.\r |
637ff819 | 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 | |
f3d08ccf | 111 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
637ff819 | 112 | ImageHandle,\r |
113 | SystemTable,\r | |
114 | &gSerialControllerDriver,\r | |
115 | ImageHandle,\r | |
116 | &gIsaSerialComponentName,\r | |
f3d08ccf | 117 | &gIsaSerialComponentName2\r |
637ff819 | 118 | );\r |
119 | ASSERT_EFI_ERROR (Status);\r | |
120 | \r | |
121 | \r | |
122 | return Status;\r | |
123 | }\r | |
124 | \r | |
bcd70414 | 125 | /**\r |
126 | Check to see if this driver supports the given controller\r | |
127 | \r | |
128 | @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
129 | @param Controller - The handle of the controller to test.\r | |
130 | @param RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
637ff819 | 131 | \r |
bcd70414 | 132 | @return EFI_SUCCESS - This driver can support the given controller\r |
133 | \r | |
134 | **/\r | |
637ff819 | 135 | EFI_STATUS\r |
136 | EFIAPI\r | |
137 | SerialControllerDriverSupported (\r | |
138 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
139 | IN EFI_HANDLE Controller,\r | |
140 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
141 | )\r | |
637ff819 | 142 | \r |
637ff819 | 143 | {\r |
144 | EFI_STATUS Status;\r | |
145 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
146 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
147 | UART_DEVICE_PATH UartNode;\r | |
148 | \r | |
149 | //\r | |
150 | // Ignore the RemainingDevicePath\r | |
151 | //\r | |
152 | //\r | |
153 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
154 | //\r | |
155 | Status = gBS->OpenProtocol (\r | |
156 | Controller,\r | |
157 | &gEfiDevicePathProtocolGuid,\r | |
158 | (VOID **) &ParentDevicePath,\r | |
159 | This->DriverBindingHandle,\r | |
160 | Controller,\r | |
161 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
162 | );\r | |
163 | if (Status == EFI_ALREADY_STARTED) {\r | |
164 | return EFI_SUCCESS;\r | |
165 | }\r | |
166 | \r | |
167 | if (EFI_ERROR (Status)) {\r | |
168 | return Status;\r | |
169 | }\r | |
170 | \r | |
171 | gBS->CloseProtocol (\r | |
172 | Controller,\r | |
173 | &gEfiDevicePathProtocolGuid,\r | |
174 | This->DriverBindingHandle,\r | |
175 | Controller\r | |
176 | );\r | |
177 | \r | |
178 | Status = gBS->OpenProtocol (\r | |
179 | Controller,\r | |
180 | &gEfiIsaIoProtocolGuid,\r | |
181 | (VOID **) &IsaIo,\r | |
182 | This->DriverBindingHandle,\r | |
183 | Controller,\r | |
184 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
185 | );\r | |
186 | \r | |
187 | if (Status == EFI_ALREADY_STARTED) {\r | |
188 | return EFI_SUCCESS;\r | |
189 | }\r | |
190 | \r | |
191 | if (EFI_ERROR (Status)) {\r | |
192 | return Status;\r | |
193 | }\r | |
194 | //\r | |
195 | // Use the ISA I/O Protocol to see if Controller is standard ISA UART that\r | |
196 | // can be managed by this driver.\r | |
197 | //\r | |
198 | Status = EFI_SUCCESS;\r | |
199 | if (IsaIo->ResourceList->Device.HID != EISA_PNP_ID (0x501)) {\r | |
200 | Status = EFI_UNSUPPORTED;\r | |
201 | goto Error;\r | |
202 | }\r | |
203 | //\r | |
204 | // Make sure RemainingDevicePath is valid\r | |
205 | //\r | |
206 | if (RemainingDevicePath != NULL) {\r | |
207 | Status = EFI_UNSUPPORTED;\r | |
208 | CopyMem (\r | |
209 | &UartNode,\r | |
210 | (UART_DEVICE_PATH *) RemainingDevicePath,\r | |
211 | sizeof (UART_DEVICE_PATH)\r | |
212 | );\r | |
213 | if (UartNode.Header.Type != MESSAGING_DEVICE_PATH ||\r | |
214 | UartNode.Header.SubType != MSG_UART_DP ||\r | |
215 | sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) &UartNode)\r | |
216 | ) {\r | |
217 | goto Error;\r | |
218 | }\r | |
219 | \r | |
220 | if (UartNode.BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {\r | |
221 | goto Error;\r | |
222 | }\r | |
223 | \r | |
224 | if (UartNode.Parity < NoParity || UartNode.Parity > SpaceParity) {\r | |
225 | goto Error;\r | |
226 | }\r | |
227 | \r | |
228 | if (UartNode.DataBits < 5 || UartNode.DataBits > 8) {\r | |
229 | goto Error;\r | |
230 | }\r | |
231 | \r | |
232 | if (UartNode.StopBits < OneStopBit || UartNode.StopBits > TwoStopBits) {\r | |
233 | goto Error;\r | |
234 | }\r | |
235 | \r | |
236 | if ((UartNode.DataBits == 5) && (UartNode.StopBits == TwoStopBits)) {\r | |
237 | goto Error;\r | |
238 | }\r | |
239 | \r | |
240 | if ((UartNode.DataBits >= 6) && (UartNode.DataBits <= 8) && (UartNode.StopBits == OneFiveStopBits)) {\r | |
241 | goto Error;\r | |
242 | }\r | |
243 | \r | |
244 | Status = EFI_SUCCESS;\r | |
245 | }\r | |
246 | \r | |
247 | Error:\r | |
248 | //\r | |
249 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
250 | //\r | |
251 | gBS->CloseProtocol (\r | |
252 | Controller,\r | |
253 | &gEfiIsaIoProtocolGuid,\r | |
254 | This->DriverBindingHandle,\r | |
255 | Controller\r | |
256 | );\r | |
257 | \r | |
258 | return Status;\r | |
259 | }\r | |
260 | \r | |
bcd70414 | 261 | /**\r |
262 | Start to management the controller passed in\r | |
263 | \r | |
264 | @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
265 | @param Controller - The handle of the controller to test.\r | |
266 | @param RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
267 | \r | |
268 | @return EFI_SUCCESS - Driver is started successfully\r | |
269 | \r | |
270 | **/\r | |
637ff819 | 271 | EFI_STATUS\r |
272 | EFIAPI\r | |
273 | SerialControllerDriverStart (\r | |
274 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
275 | IN EFI_HANDLE Controller,\r | |
276 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
277 | )\r | |
637ff819 | 278 | \r |
637ff819 | 279 | {\r |
280 | EFI_STATUS Status;\r | |
281 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
282 | SERIAL_DEV *SerialDevice;\r | |
283 | UINTN Index;\r | |
284 | UART_DEVICE_PATH Node;\r | |
285 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
286 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
287 | UINTN EntryCount;\r | |
288 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
289 | \r | |
290 | SerialDevice = NULL;\r | |
291 | //\r | |
292 | // Get the Parent Device Path\r | |
293 | //\r | |
294 | Status = gBS->OpenProtocol (\r | |
295 | Controller,\r | |
296 | &gEfiDevicePathProtocolGuid,\r | |
297 | (VOID **) &ParentDevicePath,\r | |
298 | This->DriverBindingHandle,\r | |
299 | Controller,\r | |
300 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
301 | );\r | |
302 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
303 | return Status;\r | |
304 | }\r | |
305 | //\r | |
306 | // Report status code enable the serial\r | |
307 | //\r | |
308 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
309 | EFI_PROGRESS_CODE,\r | |
310 | EFI_P_PC_ENABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
311 | ParentDevicePath\r | |
312 | );\r | |
313 | \r | |
314 | //\r | |
315 | // Grab the IO abstraction we need to get any work done\r | |
316 | //\r | |
317 | Status = gBS->OpenProtocol (\r | |
318 | Controller,\r | |
319 | &gEfiIsaIoProtocolGuid,\r | |
320 | (VOID **) &IsaIo,\r | |
321 | This->DriverBindingHandle,\r | |
322 | Controller,\r | |
323 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
324 | );\r | |
325 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
326 | goto Error;\r | |
327 | }\r | |
328 | \r | |
329 | if (Status == EFI_ALREADY_STARTED) {\r | |
330 | \r | |
331 | if (RemainingDevicePath == NULL) {\r | |
332 | return EFI_SUCCESS;\r | |
333 | }\r | |
334 | //\r | |
335 | // Make sure a child handle does not already exist. This driver can only\r | |
336 | // produce one child per serial port.\r | |
337 | //\r | |
338 | Status = gBS->OpenProtocolInformation (\r | |
339 | Controller,\r | |
340 | &gEfiIsaIoProtocolGuid,\r | |
341 | &OpenInfoBuffer,\r | |
342 | &EntryCount\r | |
343 | );\r | |
344 | if (EFI_ERROR (Status)) {\r | |
345 | return Status;\r | |
346 | }\r | |
347 | \r | |
348 | Status = EFI_ALREADY_STARTED;\r | |
349 | for (Index = 0; Index < EntryCount; Index++) {\r | |
350 | if (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) {\r | |
351 | Status = gBS->OpenProtocol (\r | |
352 | OpenInfoBuffer[Index].ControllerHandle,\r | |
353 | &gEfiSerialIoProtocolGuid,\r | |
354 | (VOID **) &SerialIo,\r | |
355 | This->DriverBindingHandle,\r | |
356 | Controller,\r | |
357 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
358 | );\r | |
359 | if (!EFI_ERROR (Status)) {\r | |
360 | CopyMem (&Node, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r | |
361 | Status = SerialIo->SetAttributes (\r | |
362 | SerialIo,\r | |
363 | Node.BaudRate,\r | |
364 | SerialIo->Mode->ReceiveFifoDepth,\r | |
365 | SerialIo->Mode->Timeout,\r | |
366 | (EFI_PARITY_TYPE) Node.Parity,\r | |
367 | Node.DataBits,\r | |
368 | (EFI_STOP_BITS_TYPE) Node.StopBits\r | |
369 | );\r | |
370 | }\r | |
371 | break;\r | |
372 | }\r | |
373 | }\r | |
374 | \r | |
375 | gBS->FreePool (OpenInfoBuffer);\r | |
376 | return Status;\r | |
377 | }\r | |
378 | //\r | |
379 | // Initialize the serial device instance\r | |
380 | //\r | |
6b88ceec | 381 | SerialDevice = AllocateCopyPool (sizeof (SERIAL_DEV), &gSerialDevTempate);\r |
637ff819 | 382 | if (SerialDevice == NULL) {\r |
383 | Status = EFI_OUT_OF_RESOURCES;\r | |
384 | goto Error;\r | |
385 | }\r | |
386 | \r | |
6b88ceec | 387 | SerialDevice->SerialIo.Mode = &(SerialDevice->SerialMode);\r |
637ff819 | 388 | SerialDevice->IsaIo = IsaIo;\r |
389 | SerialDevice->ParentDevicePath = ParentDevicePath;\r | |
637ff819 | 390 | \r |
391 | ADD_SERIAL_NAME (SerialDevice, IsaIo);\r | |
392 | \r | |
393 | for (Index = 0; SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type != EfiIsaAcpiResourceEndOfList; Index++) {\r | |
394 | if (SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type == EfiIsaAcpiResourceIo) {\r | |
395 | SerialDevice->BaseAddress = (UINT16) SerialDevice->IsaIo->ResourceList->ResourceItem[Index].StartRange;\r | |
396 | }\r | |
397 | }\r | |
398 | //\r | |
399 | // Report status code the serial present\r | |
400 | //\r | |
401 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
402 | EFI_PROGRESS_CODE,\r | |
403 | EFI_P_PC_PRESENCE_DETECT | EFI_PERIPHERAL_SERIAL_PORT,\r | |
404 | ParentDevicePath\r | |
405 | );\r | |
406 | \r | |
407 | if (!IsaSerialPortPresent (SerialDevice)) {\r | |
408 | Status = EFI_DEVICE_ERROR;\r | |
409 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
410 | EFI_ERROR_CODE,\r | |
411 | EFI_P_EC_NOT_DETECTED | EFI_PERIPHERAL_SERIAL_PORT,\r | |
412 | ParentDevicePath\r | |
413 | );\r | |
414 | goto Error;\r | |
415 | }\r | |
416 | \r | |
637ff819 | 417 | if (RemainingDevicePath != NULL) {\r |
418 | //\r | |
419 | // Match the configuration of the RemainingDevicePath. IsHandleSupported()\r | |
420 | // already checked to make sure the RemainingDevicePath contains settings\r | |
421 | // that we can support.\r | |
422 | //\r | |
423 | CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r | |
424 | } else {\r | |
425 | //\r | |
6b88ceec A |
426 | // Use the values from the gSerialDevTempate as no remaining device path was\r |
427 | // passed in.\r | |
637ff819 | 428 | //\r |
637ff819 | 429 | }\r |
430 | //\r | |
431 | // Build the device path by appending the UART node to the ParentDevicePath\r | |
432 | // from the WinNtIo handle. The Uart setings are zero here, since\r | |
433 | // SetAttribute() will update them to match the current setings.\r | |
434 | //\r | |
435 | SerialDevice->DevicePath = AppendDevicePathNode (\r | |
436 | ParentDevicePath,\r | |
6b88ceec | 437 | (EFI_DEVICE_PATH_PROTOCOL *)&SerialDevice->UartDevicePath\r |
637ff819 | 438 | );\r |
637ff819 | 439 | if (SerialDevice->DevicePath == NULL) {\r |
440 | Status = EFI_DEVICE_ERROR;\r | |
441 | goto Error;\r | |
442 | }\r | |
6b88ceec | 443 | \r |
637ff819 | 444 | //\r |
445 | // Fill in Serial I/O Mode structure based on either the RemainingDevicePath or defaults.\r | |
446 | //\r | |
637ff819 | 447 | SerialDevice->SerialMode.BaudRate = SerialDevice->UartDevicePath.BaudRate;\r |
637ff819 | 448 | SerialDevice->SerialMode.DataBits = SerialDevice->UartDevicePath.DataBits;\r |
449 | SerialDevice->SerialMode.Parity = SerialDevice->UartDevicePath.Parity;\r | |
450 | SerialDevice->SerialMode.StopBits = SerialDevice->UartDevicePath.StopBits;\r | |
451 | \r | |
452 | //\r | |
453 | // Issue a reset to initialize the COM port\r | |
454 | //\r | |
455 | Status = SerialDevice->SerialIo.Reset (&SerialDevice->SerialIo);\r | |
456 | if (EFI_ERROR (Status)) {\r | |
457 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
458 | EFI_ERROR_CODE,\r | |
459 | EFI_P_EC_CONTROLLER_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
460 | ParentDevicePath\r | |
461 | );\r | |
462 | goto Error;\r | |
463 | }\r | |
464 | //\r | |
465 | // Install protocol interfaces for the serial device.\r | |
466 | //\r | |
467 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
468 | &SerialDevice->Handle,\r | |
469 | &gEfiDevicePathProtocolGuid,\r | |
470 | SerialDevice->DevicePath,\r | |
471 | &gEfiSerialIoProtocolGuid,\r | |
472 | &SerialDevice->SerialIo,\r | |
473 | NULL\r | |
474 | );\r | |
475 | if (EFI_ERROR (Status)) {\r | |
476 | goto Error;\r | |
477 | }\r | |
478 | //\r | |
479 | // Open For Child Device\r | |
480 | //\r | |
481 | Status = gBS->OpenProtocol (\r | |
482 | Controller,\r | |
483 | &gEfiIsaIoProtocolGuid,\r | |
484 | (VOID **) &IsaIo,\r | |
485 | This->DriverBindingHandle,\r | |
486 | SerialDevice->Handle,\r | |
487 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
488 | );\r | |
489 | \r | |
490 | Error:\r | |
491 | if (EFI_ERROR (Status)) {\r | |
492 | gBS->CloseProtocol (\r | |
493 | Controller,\r | |
494 | &gEfiDevicePathProtocolGuid,\r | |
495 | This->DriverBindingHandle,\r | |
496 | Controller\r | |
497 | );\r | |
498 | gBS->CloseProtocol (\r | |
499 | Controller,\r | |
500 | &gEfiIsaIoProtocolGuid,\r | |
501 | This->DriverBindingHandle,\r | |
502 | Controller\r | |
503 | );\r | |
504 | if (SerialDevice) {\r | |
505 | if (SerialDevice->DevicePath) {\r | |
506 | gBS->FreePool (SerialDevice->DevicePath);\r | |
507 | }\r | |
508 | \r | |
509 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
510 | gBS->FreePool (SerialDevice);\r | |
511 | }\r | |
512 | }\r | |
513 | \r | |
514 | return Status;\r | |
515 | }\r | |
516 | \r | |
bcd70414 | 517 | /**\r |
518 | Disconnect this driver with the controller, uninstall related protocol instance\r | |
519 | \r | |
520 | @param This - A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
521 | @param Controller - The handle of the controller to test.\r | |
522 | @param NumberOfChildren - Number of child device.\r | |
523 | @param RemainingDevicePath - A pointer to the remaining portion of a device path.\r | |
524 | \r | |
525 | @retval EFI_SUCCESS - Operation successfully\r | |
526 | @retval EFI_DEVICE_ERROR - Cannot stop the driver successfully\r | |
527 | \r | |
528 | **/\r | |
637ff819 | 529 | EFI_STATUS\r |
530 | EFIAPI\r | |
531 | SerialControllerDriverStop (\r | |
532 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
533 | IN EFI_HANDLE Controller,\r | |
534 | IN UINTN NumberOfChildren,\r | |
535 | IN EFI_HANDLE *ChildHandleBuffer\r | |
536 | )\r | |
637ff819 | 537 | \r |
637ff819 | 538 | {\r |
539 | EFI_STATUS Status;\r | |
540 | UINTN Index;\r | |
541 | BOOLEAN AllChildrenStopped;\r | |
542 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
543 | SERIAL_DEV *SerialDevice;\r | |
544 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
545 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
546 | \r | |
547 | Status = gBS->HandleProtocol (\r | |
548 | Controller,\r | |
549 | &gEfiDevicePathProtocolGuid,\r | |
550 | (VOID **) &DevicePath\r | |
551 | );\r | |
552 | \r | |
553 | //\r | |
554 | // Report the status code disable the serial\r | |
555 | //\r | |
556 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
557 | EFI_PROGRESS_CODE,\r | |
558 | EFI_P_PC_DISABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
559 | DevicePath\r | |
560 | );\r | |
561 | \r | |
562 | //\r | |
563 | // Complete all outstanding transactions to Controller.\r | |
564 | // Don't allow any new transaction to Controller to be started.\r | |
565 | //\r | |
566 | if (NumberOfChildren == 0) {\r | |
567 | //\r | |
568 | // Close the bus driver\r | |
569 | //\r | |
570 | Status = gBS->CloseProtocol (\r | |
571 | Controller,\r | |
572 | &gEfiIsaIoProtocolGuid,\r | |
573 | This->DriverBindingHandle,\r | |
574 | Controller\r | |
575 | );\r | |
576 | \r | |
577 | Status = gBS->CloseProtocol (\r | |
578 | Controller,\r | |
579 | &gEfiDevicePathProtocolGuid,\r | |
580 | This->DriverBindingHandle,\r | |
581 | Controller\r | |
582 | );\r | |
583 | return Status;\r | |
584 | }\r | |
585 | \r | |
586 | AllChildrenStopped = TRUE;\r | |
587 | \r | |
588 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
589 | \r | |
590 | Status = gBS->OpenProtocol (\r | |
591 | ChildHandleBuffer[Index],\r | |
592 | &gEfiSerialIoProtocolGuid,\r | |
593 | (VOID **) &SerialIo,\r | |
594 | This->DriverBindingHandle,\r | |
595 | Controller,\r | |
596 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
597 | );\r | |
598 | if (!EFI_ERROR (Status)) {\r | |
599 | \r | |
600 | SerialDevice = SERIAL_DEV_FROM_THIS (SerialIo);\r | |
601 | \r | |
602 | Status = gBS->CloseProtocol (\r | |
603 | Controller,\r | |
604 | &gEfiIsaIoProtocolGuid,\r | |
605 | This->DriverBindingHandle,\r | |
606 | ChildHandleBuffer[Index]\r | |
607 | );\r | |
608 | \r | |
609 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
610 | ChildHandleBuffer[Index],\r | |
611 | &gEfiDevicePathProtocolGuid,\r | |
612 | SerialDevice->DevicePath,\r | |
613 | &gEfiSerialIoProtocolGuid,\r | |
614 | &SerialDevice->SerialIo,\r | |
615 | NULL\r | |
616 | );\r | |
617 | if (EFI_ERROR (Status)) {\r | |
618 | gBS->OpenProtocol (\r | |
619 | Controller,\r | |
620 | &gEfiIsaIoProtocolGuid,\r | |
621 | (VOID **) &IsaIo,\r | |
622 | This->DriverBindingHandle,\r | |
623 | ChildHandleBuffer[Index],\r | |
624 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
625 | );\r | |
626 | } else {\r | |
627 | if (SerialDevice->DevicePath) {\r | |
628 | gBS->FreePool (SerialDevice->DevicePath);\r | |
629 | }\r | |
630 | \r | |
631 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
632 | gBS->FreePool (SerialDevice);\r | |
633 | }\r | |
634 | }\r | |
635 | \r | |
636 | if (EFI_ERROR (Status)) {\r | |
637 | AllChildrenStopped = FALSE;\r | |
638 | }\r | |
639 | }\r | |
640 | \r | |
641 | if (!AllChildrenStopped) {\r | |
642 | return EFI_DEVICE_ERROR;\r | |
643 | }\r | |
644 | \r | |
645 | return EFI_SUCCESS;\r | |
646 | }\r | |
647 | \r | |
bcd70414 | 648 | /**\r |
649 | Detect whether specific FIFO is full or not\r | |
650 | \r | |
651 | @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
652 | \r | |
653 | @return whether specific FIFO is full or not\r | |
654 | \r | |
655 | **/\r | |
637ff819 | 656 | BOOLEAN\r |
657 | IsaSerialFifoFull (\r | |
658 | IN SERIAL_DEV_FIFO *Fifo\r | |
659 | )\r | |
637ff819 | 660 | \r |
637ff819 | 661 | {\r |
662 | if (Fifo->Surplus == 0) {\r | |
663 | return TRUE;\r | |
664 | }\r | |
665 | \r | |
666 | return FALSE;\r | |
667 | }\r | |
668 | \r | |
bcd70414 | 669 | /**\r |
670 | Detect whether specific FIFO is empty or not\r | |
671 | \r | |
672 | \r | |
673 | @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
674 | \r | |
675 | @return whether specific FIFO is empty or not\r | |
676 | \r | |
677 | **/\r | |
637ff819 | 678 | BOOLEAN\r |
679 | IsaSerialFifoEmpty (\r | |
680 | IN SERIAL_DEV_FIFO *Fifo\r | |
681 | )\r | |
637ff819 | 682 | \r |
637ff819 | 683 | {\r |
684 | if (Fifo->Surplus == SERIAL_MAX_BUFFER_SIZE) {\r | |
685 | return TRUE;\r | |
686 | }\r | |
687 | \r | |
688 | return FALSE;\r | |
689 | }\r | |
690 | \r | |
bcd70414 | 691 | /**\r |
692 | Add data to specific FIFO\r | |
693 | \r | |
694 | @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
695 | @param Data - the data added to FIFO\r | |
696 | \r | |
697 | @retval EFI_SUCCESS - Add data to specific FIFO successfully\r | |
698 | @retval EFI_OUT_OF_RESOURCE - Failed to add data because FIFO is already full\r | |
699 | \r | |
700 | **/\r | |
637ff819 | 701 | EFI_STATUS\r |
702 | IsaSerialFifoAdd (\r | |
703 | IN SERIAL_DEV_FIFO *Fifo,\r | |
704 | IN UINT8 Data\r | |
705 | )\r | |
637ff819 | 706 | \r |
637ff819 | 707 | {\r |
708 | //\r | |
709 | // if FIFO full can not add data\r | |
710 | //\r | |
711 | if (IsaSerialFifoFull (Fifo)) {\r | |
712 | return EFI_OUT_OF_RESOURCES;\r | |
713 | }\r | |
714 | //\r | |
715 | // FIFO is not full can add data\r | |
716 | //\r | |
717 | Fifo->Data[Fifo->Last] = Data;\r | |
718 | Fifo->Surplus--;\r | |
719 | Fifo->Last++;\r | |
720 | if (Fifo->Last == SERIAL_MAX_BUFFER_SIZE) {\r | |
721 | Fifo->Last = 0;\r | |
722 | }\r | |
723 | \r | |
724 | return EFI_SUCCESS;\r | |
725 | }\r | |
726 | \r | |
bcd70414 | 727 | /**\r |
728 | Remove data from specific FIFO\r | |
729 | \r | |
730 | @param Fifo - A pointer to the Data Structure SERIAL_DEV_FIFO\r | |
731 | @param Data - the data removed from FIFO\r | |
732 | \r | |
733 | @retval EFI_SUCCESS - Remove data from specific FIFO successfully\r | |
734 | @retval EFI_OUT_OF_RESOURCE - Failed to remove data because FIFO is empty\r | |
735 | \r | |
736 | **/\r | |
637ff819 | 737 | EFI_STATUS\r |
738 | IsaSerialFifoRemove (\r | |
739 | IN SERIAL_DEV_FIFO *Fifo,\r | |
740 | OUT UINT8 *Data\r | |
741 | )\r | |
637ff819 | 742 | \r |
637ff819 | 743 | {\r |
744 | //\r | |
745 | // if FIFO is empty, no data can remove\r | |
746 | //\r | |
747 | if (IsaSerialFifoEmpty (Fifo)) {\r | |
748 | return EFI_OUT_OF_RESOURCES;\r | |
749 | }\r | |
750 | //\r | |
751 | // FIFO is not empty, can remove data\r | |
752 | //\r | |
753 | *Data = Fifo->Data[Fifo->First];\r | |
754 | Fifo->Surplus++;\r | |
755 | Fifo->First++;\r | |
756 | if (Fifo->First == SERIAL_MAX_BUFFER_SIZE) {\r | |
757 | Fifo->First = 0;\r | |
758 | }\r | |
759 | \r | |
760 | return EFI_SUCCESS;\r | |
761 | }\r | |
762 | \r | |
bcd70414 | 763 | /**\r |
764 | Reads and writes all avaliable data.\r | |
765 | \r | |
766 | @param SerialDevice - The device to flush\r | |
767 | \r | |
768 | @retval EFI_SUCCESS - Data was read/written successfully.\r | |
769 | @retval EFI_OUT_OF_RESOURCE - Failed because software receive FIFO is full. Note, when\r | |
770 | this happens, pending writes are not done.\r | |
771 | \r | |
772 | **/\r | |
637ff819 | 773 | EFI_STATUS\r |
774 | IsaSerialReceiveTransmit (\r | |
775 | IN SERIAL_DEV *SerialDevice\r | |
776 | )\r | |
637ff819 | 777 | \r |
637ff819 | 778 | {\r |
779 | SERIAL_PORT_LSR Lsr;\r | |
780 | UINT8 Data;\r | |
781 | BOOLEAN ReceiveFifoFull;\r | |
782 | SERIAL_PORT_MSR Msr;\r | |
783 | SERIAL_PORT_MCR Mcr;\r | |
784 | UINTN TimeOut;\r | |
785 | \r | |
786 | Data = 0;\r | |
787 | \r | |
788 | //\r | |
789 | // Begin the read or write\r | |
790 | //\r | |
791 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
792 | do {\r | |
793 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
794 | if (!IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
795 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
796 | if (ReceiveFifoFull) {\r | |
797 | return EFI_OUT_OF_RESOURCES;\r | |
798 | }\r | |
799 | \r | |
800 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r | |
801 | }\r | |
802 | } while (!IsaSerialFifoEmpty (&SerialDevice->Transmit));\r | |
803 | } else {\r | |
804 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
805 | do {\r | |
806 | Lsr.Data = READ_LSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
807 | \r | |
808 | if (FeaturePcdGet (PcdNtEmulatorEnable)) {\r | |
809 | //\r | |
810 | // This is required for NT to avoid a forever-spin...\r | |
811 | // This would be better if READ_LSR was a polling operation\r | |
812 | // that would timeout.\r | |
813 | //\r | |
814 | Lsr.Bits.THRE = 1;\r | |
815 | }\r | |
816 | //\r | |
817 | // Flush incomming data to prevent a an overrun during a long write\r | |
818 | //\r | |
819 | if (Lsr.Bits.DR && !ReceiveFifoFull) {\r | |
820 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
821 | if (!ReceiveFifoFull) {\r | |
822 | if (Lsr.Bits.FIFOE || Lsr.Bits.OE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r | |
823 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
824 | EFI_ERROR_CODE,\r | |
825 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
826 | SerialDevice->DevicePath\r | |
827 | );\r | |
828 | if (Lsr.Bits.FIFOE || Lsr.Bits.PE || Lsr.Bits.FE || Lsr.Bits.BI) {\r | |
829 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
830 | continue;\r | |
831 | }\r | |
832 | }\r | |
833 | //\r | |
834 | // Make sure the receive data will not be missed, Assert DTR\r | |
835 | //\r | |
836 | if (SerialDevice->HardwareFlowControl) {\r | |
837 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
838 | Mcr.Bits.DTRC &= 0;\r | |
839 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
840 | }\r | |
841 | \r | |
842 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
843 | \r | |
844 | //\r | |
845 | // Deassert DTR\r | |
846 | //\r | |
847 | if (SerialDevice->HardwareFlowControl) {\r | |
848 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
849 | Mcr.Bits.DTRC |= 1;\r | |
850 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
851 | }\r | |
852 | \r | |
853 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r | |
854 | \r | |
855 | continue;\r | |
856 | } else {\r | |
857 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
858 | EFI_PROGRESS_CODE,\r | |
859 | EFI_P_SERIAL_PORT_PC_CLEAR_BUFFER | EFI_PERIPHERAL_SERIAL_PORT,\r | |
860 | SerialDevice->DevicePath\r | |
861 | );\r | |
862 | }\r | |
863 | }\r | |
864 | //\r | |
865 | // Do the write\r | |
866 | //\r | |
867 | if (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
868 | //\r | |
869 | // Make sure the transmit data will not be missed\r | |
870 | //\r | |
871 | if (SerialDevice->HardwareFlowControl) {\r | |
872 | //\r | |
873 | // Send RTS\r | |
874 | //\r | |
875 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
876 | Mcr.Bits.RTS |= 1;\r | |
877 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
878 | //\r | |
879 | // Wait for CTS\r | |
880 | //\r | |
881 | TimeOut = 0;\r | |
882 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
883 | while (!Msr.Bits.CTS) {\r | |
884 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
885 | TimeOut++;\r | |
886 | if (TimeOut > 5) {\r | |
887 | break;\r | |
888 | }\r | |
889 | \r | |
890 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
891 | }\r | |
892 | \r | |
893 | if (Msr.Bits.CTS) {\r | |
894 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
895 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
896 | }\r | |
897 | }\r | |
898 | //\r | |
899 | // write the data out\r | |
900 | //\r | |
901 | if (!SerialDevice->HardwareFlowControl) {\r | |
902 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
903 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
904 | }\r | |
905 | //\r | |
906 | // Make sure the transmit data will not be missed\r | |
907 | //\r | |
908 | if (SerialDevice->HardwareFlowControl) {\r | |
909 | //\r | |
910 | // Assert RTS\r | |
911 | //\r | |
912 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
913 | Mcr.Bits.RTS &= 0;\r | |
914 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
915 | }\r | |
916 | }\r | |
917 | } while (Lsr.Bits.THRE && !IsaSerialFifoEmpty (&SerialDevice->Transmit));\r | |
918 | }\r | |
919 | \r | |
920 | return EFI_SUCCESS;\r | |
921 | }\r | |
bcd70414 | 922 | \r |
637ff819 | 923 | //\r |
924 | // Interface Functions\r | |
925 | //\r | |
bcd70414 | 926 | /**\r |
927 | Reset serial device\r | |
928 | \r | |
929 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
930 | \r | |
931 | @retval EFI_SUCCESS - Reset successfully\r | |
932 | @retval EFI_DEVICE_ERROR - Failed to reset\r | |
933 | \r | |
934 | **/\r | |
637ff819 | 935 | EFI_STATUS\r |
936 | EFIAPI\r | |
937 | IsaSerialReset (\r | |
938 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
939 | )\r | |
637ff819 | 940 | {\r |
941 | EFI_STATUS Status;\r | |
942 | SERIAL_DEV *SerialDevice;\r | |
943 | SERIAL_PORT_LCR Lcr;\r | |
944 | SERIAL_PORT_IER Ier;\r | |
945 | SERIAL_PORT_MCR Mcr;\r | |
946 | SERIAL_PORT_FCR Fcr;\r | |
947 | EFI_TPL Tpl;\r | |
948 | \r | |
949 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
950 | \r | |
951 | //\r | |
952 | // Report the status code reset the serial\r | |
953 | //\r | |
954 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
955 | EFI_PROGRESS_CODE,\r | |
956 | EFI_P_PC_RESET | EFI_PERIPHERAL_SERIAL_PORT,\r | |
957 | SerialDevice->DevicePath\r | |
958 | );\r | |
959 | \r | |
960 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
961 | \r | |
962 | //\r | |
963 | // Make sure DLAB is 0.\r | |
964 | //\r | |
965 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
966 | Lcr.Bits.DLAB = 0;\r | |
967 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
968 | \r | |
969 | //\r | |
970 | // Turn off all interrupts\r | |
971 | //\r | |
972 | Ier.Data = READ_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
973 | Ier.Bits.RAVIE = 0;\r | |
974 | Ier.Bits.THEIE = 0;\r | |
975 | Ier.Bits.RIE = 0;\r | |
976 | Ier.Bits.MIE = 0;\r | |
977 | WRITE_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress, Ier.Data);\r | |
978 | \r | |
979 | //\r | |
980 | // Disable the FIFO.\r | |
981 | //\r | |
982 | Fcr.Bits.TRFIFOE = 0;\r | |
983 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r | |
984 | \r | |
985 | //\r | |
986 | // Turn off loopback and disable device interrupt.\r | |
987 | //\r | |
988 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
989 | Mcr.Bits.OUT1 = 0;\r | |
990 | Mcr.Bits.OUT2 = 0;\r | |
991 | Mcr.Bits.LME = 0;\r | |
992 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
993 | \r | |
994 | //\r | |
995 | // Clear the scratch pad register\r | |
996 | //\r | |
997 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0);\r | |
998 | \r | |
999 | //\r | |
1000 | // Go set the current attributes\r | |
1001 | //\r | |
1002 | Status = This->SetAttributes (\r | |
1003 | This,\r | |
1004 | This->Mode->BaudRate,\r | |
1005 | This->Mode->ReceiveFifoDepth,\r | |
1006 | This->Mode->Timeout,\r | |
1007 | (EFI_PARITY_TYPE) This->Mode->Parity,\r | |
1008 | (UINT8) This->Mode->DataBits,\r | |
1009 | (EFI_STOP_BITS_TYPE) This->Mode->StopBits\r | |
1010 | );\r | |
1011 | \r | |
1012 | if (EFI_ERROR (Status)) {\r | |
1013 | gBS->RestoreTPL (Tpl);\r | |
1014 | return EFI_DEVICE_ERROR;\r | |
1015 | }\r | |
1016 | //\r | |
1017 | // Go set the current control bits\r | |
1018 | //\r | |
1019 | Status = This->SetControl (\r | |
1020 | This,\r | |
1021 | This->Mode->ControlMask\r | |
1022 | );\r | |
1023 | \r | |
1024 | if (EFI_ERROR (Status)) {\r | |
1025 | gBS->RestoreTPL (Tpl);\r | |
1026 | return EFI_DEVICE_ERROR;\r | |
1027 | }\r | |
1028 | //\r | |
1029 | // for 16550A enable FIFO, 16550 disable FIFO\r | |
1030 | //\r | |
1031 | Fcr.Bits.TRFIFOE = 1;\r | |
1032 | Fcr.Bits.RESETRF = 1;\r | |
1033 | Fcr.Bits.RESETTF = 1;\r | |
1034 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r | |
1035 | \r | |
1036 | //\r | |
1037 | // Reset the software FIFO\r | |
1038 | //\r | |
1039 | SerialDevice->Receive.First = 0;\r | |
1040 | SerialDevice->Receive.Last = 0;\r | |
1041 | SerialDevice->Receive.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1042 | SerialDevice->Transmit.First = 0;\r | |
1043 | SerialDevice->Transmit.Last = 0;\r | |
1044 | SerialDevice->Transmit.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1045 | \r | |
1046 | gBS->RestoreTPL (Tpl);\r | |
1047 | \r | |
1048 | //\r | |
1049 | // Device reset is complete\r | |
1050 | //\r | |
1051 | return EFI_SUCCESS;\r | |
1052 | }\r | |
1053 | \r | |
bcd70414 | 1054 | /**\r |
1055 | Set new attributes to a serial device\r | |
1056 | \r | |
1057 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1058 | @param BaudRate - The baudrate of the serial device\r | |
1059 | @param ReceiveFifoDepth - The depth of receive FIFO buffer\r | |
1060 | @param Timeout - The request timeout for a single char\r | |
1061 | @param Parity - The type of parity used in serial device\r | |
1062 | @param DataBits - Number of databits used in serial device\r | |
1063 | @param StopBits - Number of stopbits used in serial device\r | |
1064 | \r | |
1065 | @retval EFI_SUCCESS - The new attributes were set\r | |
1066 | @retval EFI_INVALID_PARAMETERS - One or more attributes have an unsupported value\r | |
1067 | @retval EFI_UNSUPPORTED - Data Bits can not set to 5 or 6\r | |
1068 | @retval EFI_DEVICE_ERROR - The serial device is not functioning correctly (no return)\r | |
1069 | \r | |
1070 | **/\r | |
637ff819 | 1071 | EFI_STATUS\r |
1072 | EFIAPI\r | |
1073 | IsaSerialSetAttributes (\r | |
1074 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1075 | IN UINT64 BaudRate,\r | |
1076 | IN UINT32 ReceiveFifoDepth,\r | |
1077 | IN UINT32 Timeout,\r | |
1078 | IN EFI_PARITY_TYPE Parity,\r | |
1079 | IN UINT8 DataBits,\r | |
1080 | IN EFI_STOP_BITS_TYPE StopBits\r | |
1081 | )\r | |
637ff819 | 1082 | {\r |
1083 | EFI_STATUS Status;\r | |
1084 | SERIAL_DEV *SerialDevice;\r | |
1085 | UINT32 Divisor;\r | |
1086 | UINT32 Remained;\r | |
1087 | SERIAL_PORT_LCR Lcr;\r | |
1088 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r | |
1089 | EFI_TPL Tpl;\r | |
1090 | \r | |
1091 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1092 | \r | |
1093 | //\r | |
1094 | // Check for default settings and fill in actual values.\r | |
1095 | //\r | |
1096 | if (BaudRate == 0) {\r | |
6b88ceec | 1097 | BaudRate = FixedPcdGet64 (PcdUartDefaultBaudRate);\r |
637ff819 | 1098 | }\r |
1099 | \r | |
1100 | if (ReceiveFifoDepth == 0) {\r | |
1101 | ReceiveFifoDepth = SERIAL_PORT_DEFAULT_RECEIVE_FIFO_DEPTH;\r | |
1102 | }\r | |
1103 | \r | |
1104 | if (Timeout == 0) {\r | |
1105 | Timeout = SERIAL_PORT_DEFAULT_TIMEOUT;\r | |
1106 | }\r | |
1107 | \r | |
1108 | if (Parity == DefaultParity) {\r | |
6bee1632 | 1109 | Parity = (EFI_PARITY_TYPE)FixedPcdGet8 (PcdUartDefaultParity);\r |
637ff819 | 1110 | }\r |
1111 | \r | |
1112 | if (DataBits == 0) {\r | |
6b88ceec | 1113 | DataBits = FixedPcdGet8 (PcdUartDefaultDataBits);\r |
637ff819 | 1114 | }\r |
1115 | \r | |
1116 | if (StopBits == DefaultStopBits) {\r | |
6b88ceec | 1117 | StopBits = (EFI_STOP_BITS_TYPE) FixedPcdGet8 (PcdUartDefaultStopBits);\r |
637ff819 | 1118 | }\r |
1119 | //\r | |
1120 | // 5 and 6 data bits can not be verified on a 16550A UART\r | |
1121 | // Return EFI_INVALID_PARAMETER if an attempt is made to use these settings.\r | |
1122 | //\r | |
1123 | if ((DataBits == 5) || (DataBits == 6)) {\r | |
1124 | return EFI_INVALID_PARAMETER;\r | |
1125 | }\r | |
1126 | //\r | |
1127 | // Make sure all parameters are valid\r | |
1128 | //\r | |
1129 | if ((BaudRate > SERIAL_PORT_MAX_BAUD_RATE) || (BaudRate < SERIAL_PORT_MIN_BAUD_RATE)) {\r | |
1130 | return EFI_INVALID_PARAMETER;\r | |
1131 | }\r | |
1132 | //\r | |
1133 | // 50,75,110,134,150,300,600,1200,1800,2000,2400,3600,4800,7200,9600,19200,\r | |
1134 | // 38400,57600,115200\r | |
1135 | //\r | |
1136 | if (BaudRate < 75) {\r | |
1137 | BaudRate = 50;\r | |
1138 | } else if (BaudRate < 110) {\r | |
1139 | BaudRate = 75;\r | |
1140 | } else if (BaudRate < 134) {\r | |
1141 | BaudRate = 110;\r | |
1142 | } else if (BaudRate < 150) {\r | |
1143 | BaudRate = 134;\r | |
1144 | } else if (BaudRate < 300) {\r | |
1145 | BaudRate = 150;\r | |
1146 | } else if (BaudRate < 600) {\r | |
1147 | BaudRate = 300;\r | |
1148 | } else if (BaudRate < 1200) {\r | |
1149 | BaudRate = 600;\r | |
1150 | } else if (BaudRate < 1800) {\r | |
1151 | BaudRate = 1200;\r | |
1152 | } else if (BaudRate < 2000) {\r | |
1153 | BaudRate = 1800;\r | |
1154 | } else if (BaudRate < 2400) {\r | |
1155 | BaudRate = 2000;\r | |
1156 | } else if (BaudRate < 3600) {\r | |
1157 | BaudRate = 2400;\r | |
1158 | } else if (BaudRate < 4800) {\r | |
1159 | BaudRate = 3600;\r | |
1160 | } else if (BaudRate < 7200) {\r | |
1161 | BaudRate = 4800;\r | |
1162 | } else if (BaudRate < 9600) {\r | |
1163 | BaudRate = 7200;\r | |
1164 | } else if (BaudRate < 19200) {\r | |
1165 | BaudRate = 9600;\r | |
1166 | } else if (BaudRate < 38400) {\r | |
1167 | BaudRate = 19200;\r | |
1168 | } else if (BaudRate < 57600) {\r | |
1169 | BaudRate = 38400;\r | |
1170 | } else if (BaudRate < 115200) {\r | |
1171 | BaudRate = 57600;\r | |
1172 | } else if (BaudRate <= SERIAL_PORT_MAX_BAUD_RATE) {\r | |
1173 | BaudRate = 115200;\r | |
1174 | }\r | |
1175 | \r | |
1176 | if ((ReceiveFifoDepth < 1) || (ReceiveFifoDepth > SERIAL_PORT_MAX_RECEIVE_FIFO_DEPTH)) {\r | |
1177 | return EFI_INVALID_PARAMETER;\r | |
1178 | }\r | |
1179 | \r | |
1180 | if ((Timeout < SERIAL_PORT_MIN_TIMEOUT) || (Timeout > SERIAL_PORT_MAX_TIMEOUT)) {\r | |
1181 | return EFI_INVALID_PARAMETER;\r | |
1182 | }\r | |
1183 | \r | |
1184 | if ((Parity < NoParity) || (Parity > SpaceParity)) {\r | |
1185 | return EFI_INVALID_PARAMETER;\r | |
1186 | }\r | |
1187 | \r | |
1188 | if ((DataBits < 5) || (DataBits > 8)) {\r | |
1189 | return EFI_INVALID_PARAMETER;\r | |
1190 | }\r | |
1191 | \r | |
1192 | if ((StopBits < OneStopBit) || (StopBits > TwoStopBits)) {\r | |
1193 | return EFI_INVALID_PARAMETER;\r | |
1194 | }\r | |
1195 | //\r | |
1196 | // for DataBits = 5, StopBits can not set TwoStopBits\r | |
1197 | //\r | |
1198 | // if ((DataBits == 5) && (StopBits == TwoStopBits)) {\r | |
1199 | // return EFI_INVALID_PARAMETER;\r | |
1200 | // }\r | |
1201 | //\r | |
1202 | // for DataBits = 6,7,8, StopBits can not set OneFiveStopBits\r | |
1203 | //\r | |
1204 | if ((DataBits >= 6) && (DataBits <= 8) && (StopBits == OneFiveStopBits)) {\r | |
1205 | return EFI_INVALID_PARAMETER;\r | |
1206 | }\r | |
1207 | \r | |
1208 | //\r | |
1209 | // Compute divisor use to program the baud rate using a round determination\r | |
1210 | //\r | |
1211 | Divisor = (UINT32) DivU64x32Remainder (\r | |
1212 | SERIAL_PORT_INPUT_CLOCK,\r | |
1213 | ((UINT32) BaudRate * 16),\r | |
1214 | &Remained\r | |
1215 | );\r | |
1216 | if (Remained) {\r | |
1217 | Divisor += 1;\r | |
1218 | }\r | |
1219 | \r | |
1220 | if ((Divisor == 0) || (Divisor & 0xffff0000)) {\r | |
1221 | return EFI_INVALID_PARAMETER;\r | |
1222 | }\r | |
1223 | \r | |
1224 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1225 | \r | |
1226 | //\r | |
1227 | // Compute the actual baud rate that the serial port will be programmed for.\r | |
1228 | //\r | |
1229 | BaudRate = SERIAL_PORT_INPUT_CLOCK / Divisor / 16;\r | |
1230 | \r | |
1231 | //\r | |
1232 | // Put serial port on Divisor Latch Mode\r | |
1233 | //\r | |
1234 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1235 | Lcr.Bits.DLAB = 1;\r | |
1236 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
1237 | \r | |
1238 | //\r | |
1239 | // Write the divisor to the serial port\r | |
1240 | //\r | |
1241 | WRITE_DLL (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) (Divisor & 0xff));\r | |
1242 | WRITE_DLM (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) ((Divisor >> 8) & 0xff));\r | |
1243 | \r | |
1244 | //\r | |
1245 | // Put serial port back in normal mode and set remaining attributes.\r | |
1246 | //\r | |
1247 | Lcr.Bits.DLAB = 0;\r | |
1248 | \r | |
1249 | switch (Parity) {\r | |
1250 | case NoParity:\r | |
1251 | Lcr.Bits.PAREN = 0;\r | |
1252 | Lcr.Bits.EVENPAR = 0;\r | |
1253 | Lcr.Bits.STICPAR = 0;\r | |
1254 | break;\r | |
1255 | \r | |
1256 | case EvenParity:\r | |
1257 | Lcr.Bits.PAREN = 1;\r | |
1258 | Lcr.Bits.EVENPAR = 1;\r | |
1259 | Lcr.Bits.STICPAR = 0;\r | |
1260 | break;\r | |
1261 | \r | |
1262 | case OddParity:\r | |
1263 | Lcr.Bits.PAREN = 1;\r | |
1264 | Lcr.Bits.EVENPAR = 0;\r | |
1265 | Lcr.Bits.STICPAR = 0;\r | |
1266 | break;\r | |
1267 | \r | |
1268 | case SpaceParity:\r | |
1269 | Lcr.Bits.PAREN = 1;\r | |
1270 | Lcr.Bits.EVENPAR = 1;\r | |
1271 | Lcr.Bits.STICPAR = 1;\r | |
1272 | break;\r | |
1273 | \r | |
1274 | case MarkParity:\r | |
1275 | Lcr.Bits.PAREN = 1;\r | |
1276 | Lcr.Bits.EVENPAR = 0;\r | |
1277 | Lcr.Bits.STICPAR = 1;\r | |
1278 | break;\r | |
1279 | \r | |
1280 | default:\r | |
1281 | break;\r | |
1282 | }\r | |
1283 | \r | |
1284 | switch (StopBits) {\r | |
1285 | case OneStopBit:\r | |
1286 | Lcr.Bits.STOPB = 0;\r | |
1287 | break;\r | |
1288 | \r | |
1289 | case OneFiveStopBits:\r | |
1290 | case TwoStopBits:\r | |
1291 | Lcr.Bits.STOPB = 1;\r | |
1292 | break;\r | |
1293 | \r | |
1294 | default:\r | |
1295 | break;\r | |
1296 | }\r | |
1297 | //\r | |
1298 | // DataBits\r | |
1299 | //\r | |
1300 | Lcr.Bits.SERIALDB = (UINT8) ((DataBits - 5) & 0x03);\r | |
1301 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r | |
1302 | \r | |
1303 | //\r | |
1304 | // Set the Serial I/O mode\r | |
1305 | //\r | |
1306 | This->Mode->BaudRate = BaudRate;\r | |
1307 | This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;\r | |
1308 | This->Mode->Timeout = Timeout;\r | |
1309 | This->Mode->Parity = Parity;\r | |
1310 | This->Mode->DataBits = DataBits;\r | |
1311 | This->Mode->StopBits = StopBits;\r | |
1312 | \r | |
1313 | //\r | |
1314 | // See if Device Path Node has actually changed\r | |
1315 | //\r | |
1316 | if (SerialDevice->UartDevicePath.BaudRate == BaudRate &&\r | |
1317 | SerialDevice->UartDevicePath.DataBits == DataBits &&\r | |
1318 | SerialDevice->UartDevicePath.Parity == Parity &&\r | |
1319 | SerialDevice->UartDevicePath.StopBits == StopBits\r | |
1320 | ) {\r | |
1321 | gBS->RestoreTPL (Tpl);\r | |
1322 | return EFI_SUCCESS;\r | |
1323 | }\r | |
1324 | //\r | |
1325 | // Update the device path\r | |
1326 | //\r | |
1327 | SerialDevice->UartDevicePath.BaudRate = BaudRate;\r | |
1328 | SerialDevice->UartDevicePath.DataBits = DataBits;\r | |
1329 | SerialDevice->UartDevicePath.Parity = (UINT8) Parity;\r | |
1330 | SerialDevice->UartDevicePath.StopBits = (UINT8) StopBits;\r | |
1331 | \r | |
1332 | NewDevicePath = AppendDevicePathNode (\r | |
1333 | SerialDevice->ParentDevicePath,\r | |
1334 | (EFI_DEVICE_PATH_PROTOCOL *) &SerialDevice->UartDevicePath\r | |
1335 | );\r | |
1336 | if (NewDevicePath == NULL) {\r | |
1337 | gBS->RestoreTPL (Tpl);\r | |
1338 | return EFI_DEVICE_ERROR;\r | |
1339 | }\r | |
1340 | \r | |
1341 | if (SerialDevice->Handle != NULL) {\r | |
1342 | Status = gBS->ReinstallProtocolInterface (\r | |
1343 | SerialDevice->Handle,\r | |
1344 | &gEfiDevicePathProtocolGuid,\r | |
1345 | SerialDevice->DevicePath,\r | |
1346 | NewDevicePath\r | |
1347 | );\r | |
1348 | if (EFI_ERROR (Status)) {\r | |
1349 | gBS->RestoreTPL (Tpl);\r | |
1350 | return Status;\r | |
1351 | }\r | |
1352 | }\r | |
1353 | \r | |
1354 | if (SerialDevice->DevicePath) {\r | |
1355 | gBS->FreePool (SerialDevice->DevicePath);\r | |
1356 | }\r | |
1357 | \r | |
1358 | SerialDevice->DevicePath = NewDevicePath;\r | |
1359 | \r | |
1360 | gBS->RestoreTPL (Tpl);\r | |
1361 | \r | |
1362 | return EFI_SUCCESS;\r | |
1363 | }\r | |
1364 | \r | |
bcd70414 | 1365 | /**\r |
1366 | Set Control Bits\r | |
1367 | \r | |
1368 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1369 | @param Control - Control bits that can be settable\r | |
1370 | \r | |
1371 | @retval EFI_SUCCESS - New Control bits were set successfully\r | |
1372 | @retval EFI_UNSUPPORTED - The Control bits wanted to set are not supported\r | |
1373 | \r | |
1374 | **/\r | |
637ff819 | 1375 | EFI_STATUS\r |
1376 | EFIAPI\r | |
1377 | IsaSerialSetControl (\r | |
1378 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1379 | IN UINT32 Control\r | |
1380 | )\r | |
637ff819 | 1381 | {\r |
1382 | SERIAL_DEV *SerialDevice;\r | |
1383 | SERIAL_PORT_MCR Mcr;\r | |
1384 | EFI_TPL Tpl;\r | |
1385 | \r | |
1386 | //\r | |
1387 | // The control bits that can be set are :\r | |
1388 | // EFI_SERIAL_DATA_TERMINAL_READY: 0x0001 // WO\r | |
1389 | // EFI_SERIAL_REQUEST_TO_SEND: 0x0002 // WO\r | |
1390 | // EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE: 0x1000 // RW\r | |
1391 | // EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE: 0x2000 // RW\r | |
1392 | //\r | |
1393 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1394 | \r | |
1395 | //\r | |
1396 | // first determine the parameter is invalid\r | |
1397 | //\r | |
1398 | if (Control & 0xffff8ffc) {\r | |
1399 | return EFI_UNSUPPORTED;\r | |
1400 | }\r | |
1401 | \r | |
1402 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1403 | \r | |
1404 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1405 | Mcr.Bits.DTRC = 0;\r | |
1406 | Mcr.Bits.RTS = 0;\r | |
1407 | Mcr.Bits.LME = 0;\r | |
1408 | SerialDevice->SoftwareLoopbackEnable = FALSE;\r | |
1409 | SerialDevice->HardwareFlowControl = FALSE;\r | |
1410 | \r | |
1411 | if (Control & EFI_SERIAL_DATA_TERMINAL_READY) {\r | |
1412 | Mcr.Bits.DTRC = 1;\r | |
1413 | }\r | |
1414 | \r | |
1415 | if (Control & EFI_SERIAL_REQUEST_TO_SEND) {\r | |
1416 | Mcr.Bits.RTS = 1;\r | |
1417 | }\r | |
1418 | \r | |
1419 | if (Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r | |
1420 | Mcr.Bits.LME = 1;\r | |
1421 | }\r | |
1422 | \r | |
1423 | if (Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r | |
1424 | SerialDevice->HardwareFlowControl = TRUE;\r | |
1425 | }\r | |
1426 | \r | |
1427 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1428 | \r | |
1429 | if (Control & EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) {\r | |
1430 | SerialDevice->SoftwareLoopbackEnable = TRUE;\r | |
1431 | }\r | |
1432 | \r | |
1433 | gBS->RestoreTPL (Tpl);\r | |
1434 | \r | |
1435 | return EFI_SUCCESS;\r | |
1436 | }\r | |
1437 | \r | |
bcd70414 | 1438 | /**\r |
1439 | Get ControlBits\r | |
1440 | \r | |
1441 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1442 | @param Control - Control signals of the serial device\r | |
1443 | \r | |
1444 | @retval EFI_SUCCESS - Get Control signals successfully\r | |
1445 | \r | |
1446 | **/\r | |
637ff819 | 1447 | EFI_STATUS\r |
1448 | EFIAPI\r | |
1449 | IsaSerialGetControl (\r | |
1450 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1451 | OUT UINT32 *Control\r | |
1452 | )\r | |
637ff819 | 1453 | {\r |
1454 | SERIAL_DEV *SerialDevice;\r | |
1455 | SERIAL_PORT_MSR Msr;\r | |
1456 | SERIAL_PORT_MCR Mcr;\r | |
1457 | EFI_TPL Tpl;\r | |
1458 | \r | |
1459 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1460 | \r | |
1461 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1462 | \r | |
1463 | *Control = 0;\r | |
1464 | \r | |
1465 | //\r | |
1466 | // Read the Modem Status Register\r | |
1467 | //\r | |
1468 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1469 | \r | |
1470 | if (Msr.Bits.CTS) {\r | |
1471 | *Control |= EFI_SERIAL_CLEAR_TO_SEND;\r | |
1472 | }\r | |
1473 | \r | |
1474 | if (Msr.Bits.DSR) {\r | |
1475 | *Control |= EFI_SERIAL_DATA_SET_READY;\r | |
1476 | }\r | |
1477 | \r | |
1478 | if (Msr.Bits.RI) {\r | |
1479 | *Control |= EFI_SERIAL_RING_INDICATE;\r | |
1480 | }\r | |
1481 | \r | |
1482 | if (Msr.Bits.DCD) {\r | |
1483 | *Control |= EFI_SERIAL_CARRIER_DETECT;\r | |
1484 | }\r | |
1485 | //\r | |
1486 | // Read the Modem Control Register\r | |
1487 | //\r | |
1488 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1489 | \r | |
1490 | if (Mcr.Bits.DTRC) {\r | |
1491 | *Control |= EFI_SERIAL_DATA_TERMINAL_READY;\r | |
1492 | }\r | |
1493 | \r | |
1494 | if (Mcr.Bits.RTS) {\r | |
1495 | *Control |= EFI_SERIAL_REQUEST_TO_SEND;\r | |
1496 | }\r | |
1497 | \r | |
1498 | if (Mcr.Bits.LME) {\r | |
1499 | *Control |= EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE;\r | |
1500 | }\r | |
1501 | \r | |
1502 | if (SerialDevice->HardwareFlowControl) {\r | |
1503 | *Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
1504 | }\r | |
1505 | //\r | |
1506 | // See if the Transmit FIFO is empty\r | |
1507 | //\r | |
1508 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1509 | \r | |
1510 | if (IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1511 | *Control |= EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r | |
1512 | }\r | |
1513 | //\r | |
1514 | // See if the Receive FIFO is empty.\r | |
1515 | //\r | |
1516 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1517 | \r | |
1518 | if (IsaSerialFifoEmpty (&SerialDevice->Receive)) {\r | |
1519 | *Control |= EFI_SERIAL_INPUT_BUFFER_EMPTY;\r | |
1520 | }\r | |
1521 | \r | |
1522 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
1523 | *Control |= EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE;\r | |
1524 | }\r | |
1525 | \r | |
1526 | gBS->RestoreTPL (Tpl);\r | |
1527 | \r | |
1528 | return EFI_SUCCESS;\r | |
1529 | }\r | |
1530 | \r | |
bcd70414 | 1531 | /**\r |
1532 | Write the specified number of bytes to serial device\r | |
1533 | \r | |
1534 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1535 | @param BufferSize - On input the size of Buffer, on output the amount of\r | |
1536 | data actually written\r | |
1537 | @param Buffer - The buffer of data to write\r | |
1538 | \r | |
1539 | @retval EFI_SUCCESS - The data were written successfully\r | |
1540 | @retval EFI_DEVICE_ERROR - The device reported an error\r | |
1541 | @retval EFI_TIMEOUT - The write operation was stopped due to timeout\r | |
1542 | \r | |
1543 | **/\r | |
637ff819 | 1544 | EFI_STATUS\r |
1545 | EFIAPI\r | |
1546 | IsaSerialWrite (\r | |
1547 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1548 | IN OUT UINTN *BufferSize,\r | |
1549 | IN VOID *Buffer\r | |
1550 | )\r | |
637ff819 | 1551 | {\r |
1552 | SERIAL_DEV *SerialDevice;\r | |
1553 | UINT8 *CharBuffer;\r | |
1554 | UINT32 Index;\r | |
1555 | UINTN Elapsed;\r | |
1556 | UINTN ActualWrite;\r | |
1557 | EFI_TPL Tpl;\r | |
1558 | \r | |
1559 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1560 | Elapsed = 0;\r | |
1561 | ActualWrite = 0;\r | |
1562 | \r | |
1563 | if (*BufferSize == 0) {\r | |
1564 | return EFI_SUCCESS;\r | |
1565 | }\r | |
1566 | \r | |
1567 | if (!Buffer) {\r | |
1568 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1569 | EFI_ERROR_CODE,\r | |
1570 | EFI_P_EC_OUTPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1571 | SerialDevice->DevicePath\r | |
1572 | );\r | |
1573 | \r | |
1574 | return EFI_DEVICE_ERROR;\r | |
1575 | }\r | |
1576 | \r | |
1577 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1578 | \r | |
1579 | CharBuffer = (UINT8 *) Buffer;\r | |
1580 | \r | |
1581 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1582 | IsaSerialFifoAdd (&SerialDevice->Transmit, CharBuffer[Index]);\r | |
1583 | \r | |
1584 | while (IsaSerialReceiveTransmit (SerialDevice) != EFI_SUCCESS || !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1585 | //\r | |
1586 | // Unsuccessful write so check if timeout has expired, if not,\r | |
1587 | // stall for a bit, increment time elapsed, and try again\r | |
1588 | //\r | |
1589 | if (Elapsed >= This->Mode->Timeout) {\r | |
1590 | *BufferSize = ActualWrite;\r | |
1591 | gBS->RestoreTPL (Tpl);\r | |
1592 | return EFI_TIMEOUT;\r | |
1593 | }\r | |
1594 | \r | |
1595 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1596 | \r | |
1597 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1598 | }\r | |
1599 | \r | |
1600 | ActualWrite++;\r | |
1601 | //\r | |
1602 | // Successful write so reset timeout\r | |
1603 | //\r | |
1604 | Elapsed = 0;\r | |
1605 | }\r | |
1606 | \r | |
1607 | gBS->RestoreTPL (Tpl);\r | |
1608 | \r | |
1609 | return EFI_SUCCESS;\r | |
1610 | }\r | |
1611 | \r | |
bcd70414 | 1612 | /**\r |
1613 | Read the specified number of bytes from serial device\r | |
1614 | \r | |
1615 | @param This - Pointer to EFI_SERIAL_IO_PROTOCOL\r | |
1616 | @param BufferSize - On input the size of Buffer, on output the amount of\r | |
1617 | data returned in buffer\r | |
1618 | @param Buffer - The buffer to return the data into\r | |
1619 | \r | |
1620 | @retval EFI_SUCCESS - The data were read successfully\r | |
1621 | @retval EFI_DEVICE_ERROR - The device reported an error\r | |
1622 | @retval EFI_TIMEOUT - The read operation was stopped due to timeout\r | |
1623 | \r | |
1624 | **/\r | |
637ff819 | 1625 | EFI_STATUS\r |
1626 | EFIAPI\r | |
1627 | IsaSerialRead (\r | |
1628 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1629 | IN OUT UINTN *BufferSize,\r | |
1630 | OUT VOID *Buffer\r | |
1631 | )\r | |
637ff819 | 1632 | {\r |
1633 | SERIAL_DEV *SerialDevice;\r | |
1634 | UINT32 Index;\r | |
1635 | UINT8 *CharBuffer;\r | |
1636 | UINTN Elapsed;\r | |
1637 | EFI_STATUS Status;\r | |
1638 | EFI_TPL Tpl;\r | |
1639 | \r | |
1640 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1641 | Elapsed = 0;\r | |
1642 | \r | |
1643 | if (*BufferSize == 0) {\r | |
1644 | return EFI_SUCCESS;\r | |
1645 | }\r | |
1646 | \r | |
1647 | if (!Buffer) {\r | |
1648 | return EFI_DEVICE_ERROR;\r | |
1649 | }\r | |
1650 | \r | |
1651 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1652 | \r | |
1653 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1654 | \r | |
1655 | if (EFI_ERROR (Status)) {\r | |
1656 | *BufferSize = 0;\r | |
1657 | \r | |
1658 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1659 | EFI_ERROR_CODE,\r | |
1660 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1661 | SerialDevice->DevicePath\r | |
1662 | );\r | |
1663 | \r | |
1664 | gBS->RestoreTPL (Tpl);\r | |
1665 | \r | |
1666 | return EFI_DEVICE_ERROR;\r | |
1667 | }\r | |
1668 | \r | |
1669 | CharBuffer = (UINT8 *) Buffer;\r | |
1670 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1671 | while (IsaSerialFifoRemove (&SerialDevice->Receive, &(CharBuffer[Index])) != EFI_SUCCESS) {\r | |
1672 | //\r | |
1673 | // Unsuccessful read so check if timeout has expired, if not,\r | |
1674 | // stall for a bit, increment time elapsed, and try again\r | |
1675 | // Need this time out to get conspliter to work.\r | |
1676 | //\r | |
1677 | if (Elapsed >= This->Mode->Timeout) {\r | |
1678 | *BufferSize = Index;\r | |
1679 | gBS->RestoreTPL (Tpl);\r | |
1680 | return EFI_TIMEOUT;\r | |
1681 | }\r | |
1682 | \r | |
1683 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1684 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1685 | \r | |
1686 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1687 | if (Status == EFI_DEVICE_ERROR) {\r | |
1688 | *BufferSize = Index;\r | |
1689 | gBS->RestoreTPL (Tpl);\r | |
1690 | return EFI_DEVICE_ERROR;\r | |
1691 | }\r | |
1692 | }\r | |
1693 | //\r | |
1694 | // Successful read so reset timeout\r | |
1695 | //\r | |
1696 | Elapsed = 0;\r | |
1697 | }\r | |
1698 | \r | |
1699 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1700 | \r | |
1701 | gBS->RestoreTPL (Tpl);\r | |
1702 | \r | |
1703 | return EFI_SUCCESS;\r | |
1704 | }\r | |
1705 | \r | |
bcd70414 | 1706 | /**\r |
1707 | Use scratchpad register to test if this serial port is present\r | |
1708 | \r | |
1709 | @param SerialDevice - Pointer to serial device structure\r | |
1710 | \r | |
1711 | @return if this serial port is present\r | |
1712 | **/\r | |
637ff819 | 1713 | BOOLEAN\r |
1714 | IsaSerialPortPresent (\r | |
1715 | IN SERIAL_DEV *SerialDevice\r | |
1716 | )\r | |
637ff819 | 1717 | \r |
637ff819 | 1718 | {\r |
1719 | UINT8 Temp;\r | |
1720 | BOOLEAN Status;\r | |
1721 | \r | |
1722 | Status = TRUE;\r | |
1723 | \r | |
1724 | //\r | |
1725 | // Save SCR reg\r | |
1726 | //\r | |
1727 | Temp = READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1728 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0xAA);\r | |
1729 | \r | |
6b88ceec | 1730 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0xAA) {\r |
637ff819 | 1731 | if (!FeaturePcdGet (PcdNtEmulatorEnable)) {\r |
1732 | Status = FALSE;\r | |
1733 | }\r | |
1734 | }\r | |
1735 | \r | |
1736 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0x55);\r | |
1737 | \r | |
6b88ceec | 1738 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0x55) {\r |
637ff819 | 1739 | if (!FeaturePcdGet (PcdNtEmulatorEnable)) {\r |
1740 | Status = FALSE;\r | |
1741 | }\r | |
1742 | }\r | |
1743 | //\r | |
1744 | // Restore SCR\r | |
1745 | //\r | |
1746 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Temp);\r | |
1747 | return Status;\r | |
1748 | }\r | |
1749 | \r | |
bcd70414 | 1750 | /**\r |
1751 | Use IsaIo protocol to read serial port\r | |
1752 | \r | |
1753 | @param IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r | |
1754 | @param BaseAddress - Serial port register group base address\r | |
1755 | @param Offset - Offset in register group\r | |
1756 | \r | |
1757 | @return Data read from serial port\r | |
1758 | \r | |
1759 | **/\r | |
637ff819 | 1760 | UINT8\r |
1761 | IsaSerialReadPort (\r | |
1762 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1763 | IN UINT16 BaseAddress,\r | |
1764 | IN UINT32 Offset\r | |
1765 | )\r | |
637ff819 | 1766 | {\r |
1767 | UINT8 Data;\r | |
1768 | \r | |
1769 | //\r | |
1770 | // Use IsaIo to access IO\r | |
1771 | //\r | |
1772 | IsaIo->Io.Read (\r | |
1773 | IsaIo,\r | |
1774 | EfiIsaIoWidthUint8,\r | |
1775 | BaseAddress + Offset,\r | |
1776 | 1,\r | |
1777 | &Data\r | |
1778 | );\r | |
1779 | return Data;\r | |
1780 | }\r | |
1781 | \r | |
bcd70414 | 1782 | /**\r |
1783 | Use IsaIo protocol to write serial port\r | |
1784 | \r | |
1785 | @param IsaIo - Pointer to EFI_ISA_IO_PROTOCOL instance\r | |
1786 | @param BaseAddress - Serial port register group base address\r | |
1787 | @param Offset - Offset in register group\r | |
1788 | @param Data - data which is to be written to some serial port register\r | |
1789 | \r | |
1790 | **/\r | |
637ff819 | 1791 | VOID\r |
1792 | IsaSerialWritePort (\r | |
1793 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1794 | IN UINT16 BaseAddress,\r | |
1795 | IN UINT32 Offset,\r | |
1796 | IN UINT8 Data\r | |
1797 | )\r | |
637ff819 | 1798 | {\r |
1799 | //\r | |
1800 | // Use IsaIo to access IO\r | |
1801 | //\r | |
1802 | IsaIo->Io.Write (\r | |
1803 | IsaIo,\r | |
1804 | EfiIsaIoWidthUint8,\r | |
1805 | BaseAddress + Offset,\r | |
1806 | 1,\r | |
1807 | &Data\r | |
1808 | );\r | |
1809 | }\r | |
1810 | \r |