]>
Commit | Line | Data |
---|---|---|
91c68197 | 1 | /** @file\r |
bcd70414 | 2 | Serial driver for standard UARTS on an ISA bus.\r |
637ff819 | 3 | \r |
1ace0001 | 4 | Copyright (c) 2006 - 2010, Intel Corporation<BR>\r |
91c68197 LG |
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 | |
366565e0 | 9 | \r |
91c68197 LG |
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 | |
6b008b74 | 44 | SERIAL_PORT_SUPPORT_CONTROL_MASK,\r |
6b88ceec A |
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 | |
91c68197 | 85 | Uart16550A,\r |
77b91d89 | 86 | NULL\r |
6b88ceec A |
87 | };\r |
88 | \r | |
6b008b74 RN |
89 | /**\r |
90 | Check the device path node whether it's the Flow Control node or not.\r | |
91 | \r | |
92 | @param[in] FlowControl The device path node to be checked.\r | |
93 | \r | |
94 | @retval TRUE It's the Flow Control node.\r | |
95 | @retval FALSE It's not.\r | |
96 | \r | |
97 | **/\r | |
98 | BOOLEAN\r | |
99 | IsUartFlowControlNode (\r | |
100 | IN UART_FLOW_CONTROL_DEVICE_PATH *FlowControl\r | |
101 | )\r | |
102 | {\r | |
103 | return (BOOLEAN) (\r | |
104 | (DevicePathType (FlowControl) == MESSAGING_DEVICE_PATH) &&\r | |
105 | (DevicePathSubType (FlowControl) == MSG_VENDOR_DP) &&\r | |
106 | (CompareGuid (&FlowControl->Guid, &gEfiUartDevicePathGuid))\r | |
107 | );\r | |
108 | }\r | |
109 | \r | |
110 | /**\r | |
111 | Check the device path node whether it contains Flow Control node or not.\r | |
112 | \r | |
113 | @param[in] DevicePath The device path to be checked.\r | |
114 | \r | |
115 | @retval TRUE It contains the Flow Control node.\r | |
116 | @retval FALSE It doesn't.\r | |
117 | \r | |
118 | **/\r | |
119 | BOOLEAN\r | |
120 | ContainsFlowControl (\r | |
121 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
122 | )\r | |
123 | {\r | |
124 | while (!IsDevicePathEnd (DevicePath)) {\r | |
125 | if (IsUartFlowControlNode ((UART_FLOW_CONTROL_DEVICE_PATH *) DevicePath)) {\r | |
126 | return TRUE;\r | |
127 | }\r | |
128 | DevicePath = NextDevicePathNode (DevicePath);\r | |
129 | }\r | |
130 | \r | |
131 | return FALSE;\r | |
132 | }\r | |
133 | \r | |
637ff819 | 134 | /**\r |
135 | The user Entry Point for module IsaSerial. The user code starts with this function.\r | |
136 | \r | |
137 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
138 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
139 | \r | |
140 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
141 | @retval other Some error occurs when executing this entry point.\r | |
142 | \r | |
143 | **/\r | |
144 | EFI_STATUS\r | |
145 | EFIAPI\r | |
6b88ceec | 146 | InitializeIsaSerial (\r |
637ff819 | 147 | IN EFI_HANDLE ImageHandle,\r |
148 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
149 | )\r | |
150 | {\r | |
151 | EFI_STATUS Status;\r | |
152 | \r | |
153 | //\r | |
154 | // Install driver model protocol(s).\r | |
155 | //\r | |
f3d08ccf | 156 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
637ff819 | 157 | ImageHandle,\r |
158 | SystemTable,\r | |
159 | &gSerialControllerDriver,\r | |
160 | ImageHandle,\r | |
161 | &gIsaSerialComponentName,\r | |
f3d08ccf | 162 | &gIsaSerialComponentName2\r |
637ff819 | 163 | );\r |
164 | ASSERT_EFI_ERROR (Status);\r | |
165 | \r | |
166 | \r | |
167 | return Status;\r | |
168 | }\r | |
169 | \r | |
bcd70414 | 170 | /**\r |
171 | Check to see if this driver supports the given controller\r | |
172 | \r | |
91c68197 LG |
173 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r |
174 | @param Controller The handle of the controller to test.\r | |
175 | @param RemainingDevicePath A pointer to the remaining portion of a device path.\r | |
637ff819 | 176 | \r |
91c68197 | 177 | @return EFI_SUCCESS This driver can support the given controller\r |
bcd70414 | 178 | \r |
179 | **/\r | |
637ff819 | 180 | EFI_STATUS\r |
181 | EFIAPI\r | |
182 | SerialControllerDriverSupported (\r | |
183 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
184 | IN EFI_HANDLE Controller,\r | |
185 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
186 | )\r | |
637ff819 | 187 | \r |
637ff819 | 188 | {\r |
189 | EFI_STATUS Status;\r | |
190 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
191 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
af4a6385 | 192 | UART_DEVICE_PATH *UartNode;\r |
6b008b74 RN |
193 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
194 | UART_FLOW_CONTROL_DEVICE_PATH *FlowControlNode;\r | |
195 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
196 | UINTN EntryCount;\r | |
197 | UINTN Index;\r | |
bf19b440 | 198 | BOOLEAN HasFlowControl;\r |
637ff819 | 199 | \r |
200 | //\r | |
af4a6385 | 201 | // Check RemainingDevicePath validation\r |
637ff819 | 202 | //\r |
af4a6385 | 203 | if (RemainingDevicePath != NULL) {\r |
204 | //\r | |
205 | // Check if RemainingDevicePath is the End of Device Path Node, \r | |
206 | // if yes, go on checking other conditions\r | |
207 | //\r | |
208 | if (!IsDevicePathEnd (RemainingDevicePath)) {\r | |
209 | //\r | |
210 | // If RemainingDevicePath isn't the End of Device Path Node,\r | |
211 | // check its validation\r | |
212 | //\r | |
213 | Status = EFI_UNSUPPORTED;\r | |
214 | \r | |
215 | UartNode = (UART_DEVICE_PATH *) RemainingDevicePath;\r | |
216 | if (UartNode->Header.Type != MESSAGING_DEVICE_PATH ||\r | |
217 | UartNode->Header.SubType != MSG_UART_DP ||\r | |
218 | sizeof (UART_DEVICE_PATH) != DevicePathNodeLength ((EFI_DEVICE_PATH_PROTOCOL *) UartNode)\r | |
219 | ) {\r | |
220 | goto Error;\r | |
221 | }\r | |
222 | \r | |
223 | if (UartNode->BaudRate > SERIAL_PORT_MAX_BAUD_RATE) {\r | |
224 | goto Error;\r | |
225 | }\r | |
226 | \r | |
227 | if (UartNode->Parity < NoParity || UartNode->Parity > SpaceParity) {\r | |
228 | goto Error;\r | |
229 | }\r | |
230 | \r | |
231 | if (UartNode->DataBits < 5 || UartNode->DataBits > 8) {\r | |
232 | goto Error;\r | |
233 | }\r | |
234 | \r | |
235 | if (UartNode->StopBits < OneStopBit || UartNode->StopBits > TwoStopBits) {\r | |
236 | goto Error;\r | |
237 | }\r | |
238 | \r | |
239 | if ((UartNode->DataBits == 5) && (UartNode->StopBits == TwoStopBits)) {\r | |
240 | goto Error;\r | |
241 | }\r | |
242 | \r | |
243 | if ((UartNode->DataBits >= 6) && (UartNode->DataBits <= 8) && (UartNode->StopBits == OneFiveStopBits)) {\r | |
244 | goto Error;\r | |
245 | }\r | |
6b008b74 RN |
246 | \r |
247 | FlowControlNode = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (UartNode);\r | |
248 | if (IsUartFlowControlNode (FlowControlNode)) {\r | |
249 | //\r | |
250 | // If the second node is Flow Control Node,\r | |
251 | // return error when it request other than hardware flow control.\r | |
252 | //\r | |
253 | if ((ReadUnaligned32 (&FlowControlNode->FlowControlMap) & ~UART_FLOW_CONTROL_HARDWARE) != 0) {\r | |
254 | goto Error;\r | |
255 | }\r | |
256 | }\r | |
af4a6385 | 257 | }\r |
258 | }\r | |
259 | \r | |
637ff819 | 260 | //\r |
261 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
262 | //\r | |
263 | Status = gBS->OpenProtocol (\r | |
264 | Controller,\r | |
af4a6385 | 265 | &gEfiIsaIoProtocolGuid,\r |
266 | (VOID **) &IsaIo,\r | |
637ff819 | 267 | This->DriverBindingHandle,\r |
268 | Controller,\r | |
269 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
270 | );\r | |
271 | if (Status == EFI_ALREADY_STARTED) {\r | |
6b008b74 RN |
272 | if (RemainingDevicePath == NULL || IsDevicePathEnd (RemainingDevicePath)) {\r |
273 | //\r | |
274 | // If RemainingDevicePath is NULL or is the End of Device Path Node\r | |
275 | //\r | |
276 | return EFI_SUCCESS;\r | |
277 | }\r | |
278 | //\r | |
279 | // When the driver has produced device path with flow control node but RemainingDevicePath only contains UART node,\r | |
280 | // return unsupported, and vice versa.\r | |
281 | //\r | |
282 | Status = gBS->OpenProtocolInformation (\r | |
283 | Controller,\r | |
284 | &gEfiIsaIoProtocolGuid,\r | |
285 | &OpenInfoBuffer,\r | |
286 | &EntryCount\r | |
287 | );\r | |
288 | if (EFI_ERROR (Status)) {\r | |
289 | return Status;\r | |
290 | }\r | |
291 | \r | |
292 | for (Index = 0; Index < EntryCount; Index++) {\r | |
293 | if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
294 | Status = gBS->OpenProtocol (\r | |
295 | OpenInfoBuffer[Index].ControllerHandle,\r | |
296 | &gEfiDevicePathProtocolGuid,\r | |
297 | (VOID **) &DevicePath,\r | |
298 | This->DriverBindingHandle,\r | |
299 | Controller,\r | |
300 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
301 | );\r | |
bf19b440 RN |
302 | if (!EFI_ERROR (Status)) {\r |
303 | HasFlowControl = ContainsFlowControl (RemainingDevicePath);\r | |
304 | if (HasFlowControl ^ ContainsFlowControl (DevicePath)) {\r | |
305 | Status = EFI_UNSUPPORTED;\r | |
306 | }\r | |
6b008b74 RN |
307 | }\r |
308 | break;\r | |
309 | }\r | |
310 | }\r | |
311 | FreePool (OpenInfoBuffer);\r | |
312 | return Status;\r | |
637ff819 | 313 | }\r |
314 | \r | |
315 | if (EFI_ERROR (Status)) {\r | |
316 | return Status;\r | |
317 | }\r | |
318 | \r | |
af4a6385 | 319 | //\r |
320 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
321 | //\r | |
637ff819 | 322 | gBS->CloseProtocol (\r |
323 | Controller,\r | |
af4a6385 | 324 | &gEfiIsaIoProtocolGuid,\r |
637ff819 | 325 | This->DriverBindingHandle,\r |
326 | Controller\r | |
327 | );\r | |
328 | \r | |
af4a6385 | 329 | //\r |
330 | // Open the EFI Device Path protocol needed to perform the supported test\r | |
331 | //\r | |
637ff819 | 332 | Status = gBS->OpenProtocol (\r |
333 | Controller,\r | |
af4a6385 | 334 | &gEfiDevicePathProtocolGuid,\r |
335 | (VOID **) &ParentDevicePath,\r | |
637ff819 | 336 | This->DriverBindingHandle,\r |
337 | Controller,\r | |
338 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
339 | );\r | |
637ff819 | 340 | if (Status == EFI_ALREADY_STARTED) {\r |
341 | return EFI_SUCCESS;\r | |
342 | }\r | |
343 | \r | |
344 | if (EFI_ERROR (Status)) {\r | |
345 | return Status;\r | |
346 | }\r | |
347 | //\r | |
348 | // Use the ISA I/O Protocol to see if Controller is standard ISA UART that\r | |
349 | // can be managed by this driver.\r | |
350 | //\r | |
351 | Status = EFI_SUCCESS;\r | |
352 | if (IsaIo->ResourceList->Device.HID != EISA_PNP_ID (0x501)) {\r | |
353 | Status = EFI_UNSUPPORTED;\r | |
354 | goto Error;\r | |
355 | }\r | |
637ff819 | 356 | \r |
357 | Error:\r | |
358 | //\r | |
af4a6385 | 359 | // Close protocol, don't use device path protocol in the Support() function\r |
637ff819 | 360 | //\r |
361 | gBS->CloseProtocol (\r | |
362 | Controller,\r | |
af4a6385 | 363 | &gEfiDevicePathProtocolGuid,\r |
637ff819 | 364 | This->DriverBindingHandle,\r |
365 | Controller\r | |
366 | );\r | |
367 | \r | |
368 | return Status;\r | |
369 | }\r | |
370 | \r | |
bcd70414 | 371 | /**\r |
372 | Start to management the controller passed in\r | |
373 | \r | |
91c68197 LG |
374 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r |
375 | @param Controller The handle of the controller to test.\r | |
376 | @param RemainingDevicePath A pointer to the remaining portion of a device path.\r | |
bcd70414 | 377 | \r |
91c68197 | 378 | @return EFI_SUCCESS Driver is started successfully\r |
bcd70414 | 379 | \r |
380 | **/\r | |
637ff819 | 381 | EFI_STATUS\r |
382 | EFIAPI\r | |
383 | SerialControllerDriverStart (\r | |
384 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
385 | IN EFI_HANDLE Controller,\r | |
386 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
387 | )\r | |
637ff819 | 388 | \r |
637ff819 | 389 | {\r |
390 | EFI_STATUS Status;\r | |
391 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
392 | SERIAL_DEV *SerialDevice;\r | |
393 | UINTN Index;\r | |
637ff819 | 394 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r |
395 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
396 | UINTN EntryCount;\r | |
397 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
6b008b74 RN |
398 | UART_DEVICE_PATH *Uart;\r |
399 | UINT32 FlowControlMap;\r | |
400 | UART_FLOW_CONTROL_DEVICE_PATH *FlowControl;\r | |
401 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;\r | |
402 | UINT32 Control;\r | |
637ff819 | 403 | \r |
404 | SerialDevice = NULL;\r | |
405 | //\r | |
406 | // Get the Parent Device Path\r | |
407 | //\r | |
408 | Status = gBS->OpenProtocol (\r | |
409 | Controller,\r | |
410 | &gEfiDevicePathProtocolGuid,\r | |
411 | (VOID **) &ParentDevicePath,\r | |
412 | This->DriverBindingHandle,\r | |
413 | Controller,\r | |
414 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
415 | );\r | |
416 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
417 | return Status;\r | |
418 | }\r | |
419 | //\r | |
420 | // Report status code enable the serial\r | |
421 | //\r | |
422 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
423 | EFI_PROGRESS_CODE,\r | |
424 | EFI_P_PC_ENABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
425 | ParentDevicePath\r | |
426 | );\r | |
427 | \r | |
428 | //\r | |
429 | // Grab the IO abstraction we need to get any work done\r | |
430 | //\r | |
431 | Status = gBS->OpenProtocol (\r | |
432 | Controller,\r | |
433 | &gEfiIsaIoProtocolGuid,\r | |
434 | (VOID **) &IsaIo,\r | |
435 | This->DriverBindingHandle,\r | |
436 | Controller,\r | |
437 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
438 | );\r | |
439 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
440 | goto Error;\r | |
441 | }\r | |
442 | \r | |
443 | if (Status == EFI_ALREADY_STARTED) {\r | |
444 | \r | |
af4a6385 | 445 | if (RemainingDevicePath == NULL || IsDevicePathEnd (RemainingDevicePath)) {\r |
446 | //\r | |
447 | // If RemainingDevicePath is NULL or is the End of Device Path Node\r | |
448 | //\r | |
637ff819 | 449 | return EFI_SUCCESS;\r |
450 | }\r | |
af4a6385 | 451 | \r |
637ff819 | 452 | //\r |
453 | // Make sure a child handle does not already exist. This driver can only\r | |
454 | // produce one child per serial port.\r | |
455 | //\r | |
456 | Status = gBS->OpenProtocolInformation (\r | |
457 | Controller,\r | |
458 | &gEfiIsaIoProtocolGuid,\r | |
459 | &OpenInfoBuffer,\r | |
460 | &EntryCount\r | |
461 | );\r | |
462 | if (EFI_ERROR (Status)) {\r | |
463 | return Status;\r | |
464 | }\r | |
465 | \r | |
466 | Status = EFI_ALREADY_STARTED;\r | |
467 | for (Index = 0; Index < EntryCount; Index++) {\r | |
1ace0001 | 468 | if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r |
637ff819 | 469 | Status = gBS->OpenProtocol (\r |
470 | OpenInfoBuffer[Index].ControllerHandle,\r | |
471 | &gEfiSerialIoProtocolGuid,\r | |
472 | (VOID **) &SerialIo,\r | |
473 | This->DriverBindingHandle,\r | |
474 | Controller,\r | |
475 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
476 | );\r | |
477 | if (!EFI_ERROR (Status)) {\r | |
6b008b74 | 478 | Uart = (UART_DEVICE_PATH *) RemainingDevicePath;\r |
637ff819 | 479 | Status = SerialIo->SetAttributes (\r |
480 | SerialIo,\r | |
6b008b74 | 481 | Uart->BaudRate,\r |
637ff819 | 482 | SerialIo->Mode->ReceiveFifoDepth,\r |
483 | SerialIo->Mode->Timeout,\r | |
6b008b74 RN |
484 | (EFI_PARITY_TYPE) Uart->Parity,\r |
485 | Uart->DataBits,\r | |
486 | (EFI_STOP_BITS_TYPE) Uart->StopBits\r | |
637ff819 | 487 | );\r |
6b008b74 RN |
488 | \r |
489 | FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (Uart);\r | |
490 | if (!EFI_ERROR (Status) && IsUartFlowControlNode (FlowControl)) {\r | |
491 | Status = SerialIo->GetControl (SerialIo, &Control);\r | |
492 | if (!EFI_ERROR (Status)) {\r | |
493 | if (ReadUnaligned32 (&FlowControl->FlowControlMap) == UART_FLOW_CONTROL_HARDWARE) {\r | |
494 | Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
495 | } else {\r | |
496 | Control &= ~EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
497 | }\r | |
498 | //\r | |
499 | // Clear the bits that are not allowed to pass to SetControl\r | |
500 | //\r | |
501 | Control &= (EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY |\r | |
502 | EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE | EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE | \r | |
503 | EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE);\r | |
504 | Status = SerialIo->SetControl (SerialIo, Control);\r | |
505 | }\r | |
506 | }\r | |
637ff819 | 507 | }\r |
508 | break;\r | |
509 | }\r | |
510 | }\r | |
511 | \r | |
9be29006 | 512 | FreePool (OpenInfoBuffer);\r |
513 | return Status;\r | |
637ff819 | 514 | }\r |
af4a6385 | 515 | \r |
516 | if (RemainingDevicePath != NULL) {\r | |
517 | if (IsDevicePathEnd (RemainingDevicePath)) {\r | |
518 | //\r | |
519 | // If RemainingDevicePath is the End of Device Path Node,\r | |
520 | // skip enumerate any device and return EFI_SUCESSS\r | |
521 | // \r | |
522 | return EFI_SUCCESS;\r | |
523 | }\r | |
524 | }\r | |
525 | \r | |
637ff819 | 526 | //\r |
527 | // Initialize the serial device instance\r | |
528 | //\r | |
6b88ceec | 529 | SerialDevice = AllocateCopyPool (sizeof (SERIAL_DEV), &gSerialDevTempate);\r |
637ff819 | 530 | if (SerialDevice == NULL) {\r |
531 | Status = EFI_OUT_OF_RESOURCES;\r | |
532 | goto Error;\r | |
533 | }\r | |
534 | \r | |
6b88ceec | 535 | SerialDevice->SerialIo.Mode = &(SerialDevice->SerialMode);\r |
637ff819 | 536 | SerialDevice->IsaIo = IsaIo;\r |
537 | SerialDevice->ParentDevicePath = ParentDevicePath;\r | |
6b008b74 RN |
538 | FlowControl = NULL;\r |
539 | FlowControlMap = 0;\r | |
637ff819 | 540 | \r |
af4a6385 | 541 | //\r |
542 | // Check if RemainingDevicePath is NULL, \r | |
543 | // if yes, use the values from the gSerialDevTempate as no remaining device path was\r | |
544 | // passed in.\r | |
545 | //\r | |
546 | if (RemainingDevicePath != NULL) {\r | |
547 | //\r | |
548 | // If RemainingDevicePath isn't NULL, \r | |
549 | // match the configuration of the RemainingDevicePath. IsHandleSupported()\r | |
550 | // already checked to make sure the RemainingDevicePath contains settings\r | |
551 | // that we can support.\r | |
552 | //\r | |
553 | CopyMem (&SerialDevice->UartDevicePath, RemainingDevicePath, sizeof (UART_DEVICE_PATH));\r | |
6b008b74 RN |
554 | FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) NextDevicePathNode (RemainingDevicePath);\r |
555 | if (IsUartFlowControlNode (FlowControl)) {\r | |
556 | FlowControlMap = ReadUnaligned32 (&FlowControl->FlowControlMap);\r | |
557 | } else {\r | |
558 | FlowControl = NULL;\r | |
559 | }\r | |
af4a6385 | 560 | }\r |
561 | \r | |
91c68197 | 562 | AddName (SerialDevice, IsaIo);\r |
637ff819 | 563 | \r |
564 | for (Index = 0; SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type != EfiIsaAcpiResourceEndOfList; Index++) {\r | |
565 | if (SerialDevice->IsaIo->ResourceList->ResourceItem[Index].Type == EfiIsaAcpiResourceIo) {\r | |
566 | SerialDevice->BaseAddress = (UINT16) SerialDevice->IsaIo->ResourceList->ResourceItem[Index].StartRange;\r | |
567 | }\r | |
568 | }\r | |
6b008b74 RN |
569 | \r |
570 | SerialDevice->HardwareFlowControl = (BOOLEAN) (FlowControlMap == UART_FLOW_CONTROL_HARDWARE);\r | |
571 | \r | |
637ff819 | 572 | //\r |
573 | // Report status code the serial present\r | |
574 | //\r | |
575 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
576 | EFI_PROGRESS_CODE,\r | |
577 | EFI_P_PC_PRESENCE_DETECT | EFI_PERIPHERAL_SERIAL_PORT,\r | |
578 | ParentDevicePath\r | |
579 | );\r | |
580 | \r | |
581 | if (!IsaSerialPortPresent (SerialDevice)) {\r | |
582 | Status = EFI_DEVICE_ERROR;\r | |
583 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
584 | EFI_ERROR_CODE,\r | |
585 | EFI_P_EC_NOT_DETECTED | EFI_PERIPHERAL_SERIAL_PORT,\r | |
586 | ParentDevicePath\r | |
587 | );\r | |
588 | goto Error;\r | |
589 | }\r | |
590 | \r | |
637ff819 | 591 | //\r |
8f3e1229 | 592 | // Build the device path by appending the UART node to the ParentDevicePath.\r |
6b008b74 | 593 | // The Uart setings are zero here, since SetAttribute() will update them to match \r |
8f3e1229 | 594 | // the default setings.\r |
637ff819 | 595 | //\r |
596 | SerialDevice->DevicePath = AppendDevicePathNode (\r | |
597 | ParentDevicePath,\r | |
6b008b74 | 598 | (EFI_DEVICE_PATH_PROTOCOL *) &SerialDevice->UartDevicePath\r |
637ff819 | 599 | );\r |
6b008b74 RN |
600 | //\r |
601 | // Only produce the Flow Control node when remaining device path has it\r | |
602 | //\r | |
603 | if (FlowControl != NULL) {\r | |
604 | TempDevicePath = SerialDevice->DevicePath;\r | |
605 | if (TempDevicePath != NULL) {\r | |
606 | SerialDevice->DevicePath = AppendDevicePathNode (\r | |
607 | TempDevicePath,\r | |
608 | (EFI_DEVICE_PATH_PROTOCOL *) FlowControl\r | |
609 | );\r | |
610 | FreePool (TempDevicePath);\r | |
611 | }\r | |
612 | }\r | |
637ff819 | 613 | if (SerialDevice->DevicePath == NULL) {\r |
6b008b74 | 614 | Status = EFI_OUT_OF_RESOURCES;\r |
637ff819 | 615 | goto Error;\r |
616 | }\r | |
6b88ceec | 617 | \r |
637ff819 | 618 | //\r |
619 | // Fill in Serial I/O Mode structure based on either the RemainingDevicePath or defaults.\r | |
620 | //\r | |
637ff819 | 621 | SerialDevice->SerialMode.BaudRate = SerialDevice->UartDevicePath.BaudRate;\r |
637ff819 | 622 | SerialDevice->SerialMode.DataBits = SerialDevice->UartDevicePath.DataBits;\r |
623 | SerialDevice->SerialMode.Parity = SerialDevice->UartDevicePath.Parity;\r | |
624 | SerialDevice->SerialMode.StopBits = SerialDevice->UartDevicePath.StopBits;\r | |
625 | \r | |
626 | //\r | |
627 | // Issue a reset to initialize the COM port\r | |
628 | //\r | |
629 | Status = SerialDevice->SerialIo.Reset (&SerialDevice->SerialIo);\r | |
630 | if (EFI_ERROR (Status)) {\r | |
631 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
632 | EFI_ERROR_CODE,\r | |
633 | EFI_P_EC_CONTROLLER_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
634 | ParentDevicePath\r | |
635 | );\r | |
636 | goto Error;\r | |
637 | }\r | |
638 | //\r | |
639 | // Install protocol interfaces for the serial device.\r | |
640 | //\r | |
641 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
642 | &SerialDevice->Handle,\r | |
643 | &gEfiDevicePathProtocolGuid,\r | |
644 | SerialDevice->DevicePath,\r | |
645 | &gEfiSerialIoProtocolGuid,\r | |
646 | &SerialDevice->SerialIo,\r | |
647 | NULL\r | |
648 | );\r | |
649 | if (EFI_ERROR (Status)) {\r | |
650 | goto Error;\r | |
651 | }\r | |
652 | //\r | |
653 | // Open For Child Device\r | |
654 | //\r | |
655 | Status = gBS->OpenProtocol (\r | |
656 | Controller,\r | |
657 | &gEfiIsaIoProtocolGuid,\r | |
658 | (VOID **) &IsaIo,\r | |
659 | This->DriverBindingHandle,\r | |
660 | SerialDevice->Handle,\r | |
661 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
662 | );\r | |
663 | \r | |
664 | Error:\r | |
665 | if (EFI_ERROR (Status)) {\r | |
666 | gBS->CloseProtocol (\r | |
667 | Controller,\r | |
668 | &gEfiDevicePathProtocolGuid,\r | |
669 | This->DriverBindingHandle,\r | |
670 | Controller\r | |
671 | );\r | |
672 | gBS->CloseProtocol (\r | |
673 | Controller,\r | |
674 | &gEfiIsaIoProtocolGuid,\r | |
675 | This->DriverBindingHandle,\r | |
676 | Controller\r | |
677 | );\r | |
91c68197 LG |
678 | if (SerialDevice != NULL) {\r |
679 | if (SerialDevice->DevicePath != NULL) {\r | |
637ff819 | 680 | gBS->FreePool (SerialDevice->DevicePath);\r |
681 | }\r | |
682 | \r | |
683 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
684 | gBS->FreePool (SerialDevice);\r | |
685 | }\r | |
686 | }\r | |
687 | \r | |
688 | return Status;\r | |
689 | }\r | |
690 | \r | |
bcd70414 | 691 | /**\r |
692 | Disconnect this driver with the controller, uninstall related protocol instance\r | |
693 | \r | |
91c68197 LG |
694 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r |
695 | @param Controller The handle of the controller to test.\r | |
696 | @param NumberOfChildren Number of child device.\r | |
697 | @param ChildHandleBuffer A pointer to the remaining portion of a device path.\r | |
bcd70414 | 698 | \r |
91c68197 LG |
699 | @retval EFI_SUCCESS Operation successfully\r |
700 | @retval EFI_DEVICE_ERROR Cannot stop the driver successfully\r | |
bcd70414 | 701 | \r |
702 | **/\r | |
637ff819 | 703 | EFI_STATUS\r |
704 | EFIAPI\r | |
705 | SerialControllerDriverStop (\r | |
706 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
707 | IN EFI_HANDLE Controller,\r | |
708 | IN UINTN NumberOfChildren,\r | |
709 | IN EFI_HANDLE *ChildHandleBuffer\r | |
710 | )\r | |
637ff819 | 711 | \r |
637ff819 | 712 | {\r |
713 | EFI_STATUS Status;\r | |
714 | UINTN Index;\r | |
715 | BOOLEAN AllChildrenStopped;\r | |
716 | EFI_SERIAL_IO_PROTOCOL *SerialIo;\r | |
717 | SERIAL_DEV *SerialDevice;\r | |
718 | EFI_ISA_IO_PROTOCOL *IsaIo;\r | |
719 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
720 | \r | |
721 | Status = gBS->HandleProtocol (\r | |
722 | Controller,\r | |
723 | &gEfiDevicePathProtocolGuid,\r | |
724 | (VOID **) &DevicePath\r | |
725 | );\r | |
726 | \r | |
727 | //\r | |
728 | // Report the status code disable the serial\r | |
729 | //\r | |
730 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
731 | EFI_PROGRESS_CODE,\r | |
732 | EFI_P_PC_DISABLE | EFI_PERIPHERAL_SERIAL_PORT,\r | |
733 | DevicePath\r | |
734 | );\r | |
735 | \r | |
736 | //\r | |
737 | // Complete all outstanding transactions to Controller.\r | |
738 | // Don't allow any new transaction to Controller to be started.\r | |
739 | //\r | |
740 | if (NumberOfChildren == 0) {\r | |
741 | //\r | |
742 | // Close the bus driver\r | |
743 | //\r | |
744 | Status = gBS->CloseProtocol (\r | |
745 | Controller,\r | |
746 | &gEfiIsaIoProtocolGuid,\r | |
747 | This->DriverBindingHandle,\r | |
748 | Controller\r | |
749 | );\r | |
750 | \r | |
751 | Status = gBS->CloseProtocol (\r | |
752 | Controller,\r | |
753 | &gEfiDevicePathProtocolGuid,\r | |
754 | This->DriverBindingHandle,\r | |
755 | Controller\r | |
756 | );\r | |
757 | return Status;\r | |
758 | }\r | |
759 | \r | |
760 | AllChildrenStopped = TRUE;\r | |
761 | \r | |
762 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
763 | \r | |
764 | Status = gBS->OpenProtocol (\r | |
765 | ChildHandleBuffer[Index],\r | |
766 | &gEfiSerialIoProtocolGuid,\r | |
767 | (VOID **) &SerialIo,\r | |
768 | This->DriverBindingHandle,\r | |
769 | Controller,\r | |
770 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
771 | );\r | |
772 | if (!EFI_ERROR (Status)) {\r | |
773 | \r | |
774 | SerialDevice = SERIAL_DEV_FROM_THIS (SerialIo);\r | |
775 | \r | |
776 | Status = gBS->CloseProtocol (\r | |
777 | Controller,\r | |
778 | &gEfiIsaIoProtocolGuid,\r | |
779 | This->DriverBindingHandle,\r | |
780 | ChildHandleBuffer[Index]\r | |
781 | );\r | |
782 | \r | |
783 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
784 | ChildHandleBuffer[Index],\r | |
785 | &gEfiDevicePathProtocolGuid,\r | |
786 | SerialDevice->DevicePath,\r | |
787 | &gEfiSerialIoProtocolGuid,\r | |
788 | &SerialDevice->SerialIo,\r | |
789 | NULL\r | |
790 | );\r | |
791 | if (EFI_ERROR (Status)) {\r | |
792 | gBS->OpenProtocol (\r | |
793 | Controller,\r | |
794 | &gEfiIsaIoProtocolGuid,\r | |
795 | (VOID **) &IsaIo,\r | |
796 | This->DriverBindingHandle,\r | |
797 | ChildHandleBuffer[Index],\r | |
798 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
799 | );\r | |
800 | } else {\r | |
91c68197 | 801 | if (SerialDevice->DevicePath != NULL) {\r |
637ff819 | 802 | gBS->FreePool (SerialDevice->DevicePath);\r |
803 | }\r | |
804 | \r | |
805 | FreeUnicodeStringTable (SerialDevice->ControllerNameTable);\r | |
806 | gBS->FreePool (SerialDevice);\r | |
807 | }\r | |
808 | }\r | |
809 | \r | |
810 | if (EFI_ERROR (Status)) {\r | |
811 | AllChildrenStopped = FALSE;\r | |
812 | }\r | |
813 | }\r | |
814 | \r | |
815 | if (!AllChildrenStopped) {\r | |
816 | return EFI_DEVICE_ERROR;\r | |
817 | }\r | |
818 | \r | |
819 | return EFI_SUCCESS;\r | |
820 | }\r | |
821 | \r | |
bcd70414 | 822 | /**\r |
91c68197 | 823 | Detect whether specific FIFO is full or not.\r |
bcd70414 | 824 | \r |
91c68197 | 825 | @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r |
bcd70414 | 826 | \r |
827 | @return whether specific FIFO is full or not\r | |
828 | \r | |
829 | **/\r | |
637ff819 | 830 | BOOLEAN\r |
831 | IsaSerialFifoFull (\r | |
832 | IN SERIAL_DEV_FIFO *Fifo\r | |
833 | )\r | |
637ff819 | 834 | \r |
637ff819 | 835 | {\r |
836 | if (Fifo->Surplus == 0) {\r | |
837 | return TRUE;\r | |
838 | }\r | |
839 | \r | |
840 | return FALSE;\r | |
841 | }\r | |
842 | \r | |
bcd70414 | 843 | /**\r |
91c68197 | 844 | Detect whether specific FIFO is empty or not.\r |
bcd70414 | 845 | \r |
91c68197 | 846 | @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r |
bcd70414 | 847 | \r |
848 | @return whether specific FIFO is empty or not\r | |
849 | \r | |
850 | **/\r | |
637ff819 | 851 | BOOLEAN\r |
852 | IsaSerialFifoEmpty (\r | |
853 | IN SERIAL_DEV_FIFO *Fifo\r | |
854 | )\r | |
637ff819 | 855 | \r |
637ff819 | 856 | {\r |
857 | if (Fifo->Surplus == SERIAL_MAX_BUFFER_SIZE) {\r | |
858 | return TRUE;\r | |
859 | }\r | |
860 | \r | |
861 | return FALSE;\r | |
862 | }\r | |
863 | \r | |
bcd70414 | 864 | /**\r |
91c68197 | 865 | Add data to specific FIFO.\r |
bcd70414 | 866 | \r |
91c68197 LG |
867 | @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r |
868 | @param Data the data added to FIFO\r | |
bcd70414 | 869 | \r |
91c68197 LG |
870 | @retval EFI_SUCCESS Add data to specific FIFO successfully\r |
871 | @retval EFI_OUT_OF_RESOURCE Failed to add data because FIFO is already full\r | |
bcd70414 | 872 | \r |
873 | **/\r | |
637ff819 | 874 | EFI_STATUS\r |
875 | IsaSerialFifoAdd (\r | |
876 | IN SERIAL_DEV_FIFO *Fifo,\r | |
877 | IN UINT8 Data\r | |
878 | )\r | |
637ff819 | 879 | \r |
637ff819 | 880 | {\r |
881 | //\r | |
882 | // if FIFO full can not add data\r | |
883 | //\r | |
884 | if (IsaSerialFifoFull (Fifo)) {\r | |
885 | return EFI_OUT_OF_RESOURCES;\r | |
886 | }\r | |
887 | //\r | |
888 | // FIFO is not full can add data\r | |
889 | //\r | |
890 | Fifo->Data[Fifo->Last] = Data;\r | |
891 | Fifo->Surplus--;\r | |
892 | Fifo->Last++;\r | |
893 | if (Fifo->Last == SERIAL_MAX_BUFFER_SIZE) {\r | |
894 | Fifo->Last = 0;\r | |
895 | }\r | |
896 | \r | |
897 | return EFI_SUCCESS;\r | |
898 | }\r | |
899 | \r | |
bcd70414 | 900 | /**\r |
91c68197 | 901 | Remove data from specific FIFO.\r |
bcd70414 | 902 | \r |
91c68197 LG |
903 | @param Fifo A pointer to the Data Structure SERIAL_DEV_FIFO\r |
904 | @param Data the data removed from FIFO\r | |
bcd70414 | 905 | \r |
91c68197 LG |
906 | @retval EFI_SUCCESS Remove data from specific FIFO successfully\r |
907 | @retval EFI_OUT_OF_RESOURCE Failed to remove data because FIFO is empty\r | |
bcd70414 | 908 | \r |
909 | **/\r | |
637ff819 | 910 | EFI_STATUS\r |
911 | IsaSerialFifoRemove (\r | |
912 | IN SERIAL_DEV_FIFO *Fifo,\r | |
913 | OUT UINT8 *Data\r | |
914 | )\r | |
637ff819 | 915 | \r |
637ff819 | 916 | {\r |
917 | //\r | |
918 | // if FIFO is empty, no data can remove\r | |
919 | //\r | |
920 | if (IsaSerialFifoEmpty (Fifo)) {\r | |
921 | return EFI_OUT_OF_RESOURCES;\r | |
922 | }\r | |
923 | //\r | |
924 | // FIFO is not empty, can remove data\r | |
925 | //\r | |
926 | *Data = Fifo->Data[Fifo->First];\r | |
927 | Fifo->Surplus++;\r | |
928 | Fifo->First++;\r | |
929 | if (Fifo->First == SERIAL_MAX_BUFFER_SIZE) {\r | |
930 | Fifo->First = 0;\r | |
931 | }\r | |
932 | \r | |
933 | return EFI_SUCCESS;\r | |
934 | }\r | |
935 | \r | |
bcd70414 | 936 | /**\r |
937 | Reads and writes all avaliable data.\r | |
938 | \r | |
91c68197 | 939 | @param SerialDevice The device to flush\r |
bcd70414 | 940 | \r |
91c68197 LG |
941 | @retval EFI_SUCCESS Data was read/written successfully.\r |
942 | @retval EFI_OUT_OF_RESOURCE Failed because software receive FIFO is full. Note, when\r | |
bcd70414 | 943 | this happens, pending writes are not done.\r |
944 | \r | |
945 | **/\r | |
637ff819 | 946 | EFI_STATUS\r |
947 | IsaSerialReceiveTransmit (\r | |
948 | IN SERIAL_DEV *SerialDevice\r | |
949 | )\r | |
637ff819 | 950 | \r |
637ff819 | 951 | {\r |
952 | SERIAL_PORT_LSR Lsr;\r | |
953 | UINT8 Data;\r | |
954 | BOOLEAN ReceiveFifoFull;\r | |
955 | SERIAL_PORT_MSR Msr;\r | |
956 | SERIAL_PORT_MCR Mcr;\r | |
957 | UINTN TimeOut;\r | |
958 | \r | |
959 | Data = 0;\r | |
960 | \r | |
961 | //\r | |
962 | // Begin the read or write\r | |
963 | //\r | |
964 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
965 | do {\r | |
966 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
967 | if (!IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
968 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
969 | if (ReceiveFifoFull) {\r | |
970 | return EFI_OUT_OF_RESOURCES;\r | |
971 | }\r | |
972 | \r | |
973 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r | |
974 | }\r | |
975 | } while (!IsaSerialFifoEmpty (&SerialDevice->Transmit));\r | |
976 | } else {\r | |
977 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r | |
fa70a2c4 | 978 | //\r |
979 | // For full handshake flow control, tell the peer to send data\r | |
980 | // if receive buffer is available.\r | |
981 | //\r | |
982 | if (SerialDevice->HardwareFlowControl &&\r | |
77b91d89 | 983 | !FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)&&\r |
fa70a2c4 | 984 | !ReceiveFifoFull\r |
985 | ) {\r | |
986 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
987 | Mcr.Bits.Rts = 1;\r | |
988 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
989 | }\r | |
637ff819 | 990 | do {\r |
991 | Lsr.Data = READ_LSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
992 | \r | |
637ff819 | 993 | //\r |
994 | // Flush incomming data to prevent a an overrun during a long write\r | |
995 | //\r | |
91c68197 | 996 | if ((Lsr.Bits.Dr == 1) && !ReceiveFifoFull) {\r |
637ff819 | 997 | ReceiveFifoFull = IsaSerialFifoFull (&SerialDevice->Receive);\r |
998 | if (!ReceiveFifoFull) {\r | |
91c68197 | 999 | if (Lsr.Bits.FIFOe == 1 || Lsr.Bits.Oe == 1 || Lsr.Bits.Pe == 1 || Lsr.Bits.Fe == 1 || Lsr.Bits.Bi == 1) {\r |
637ff819 | 1000 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r |
1001 | EFI_ERROR_CODE,\r | |
1002 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1003 | SerialDevice->DevicePath\r | |
1004 | );\r | |
91c68197 | 1005 | if (Lsr.Bits.FIFOe == 1 || Lsr.Bits.Pe == 1|| Lsr.Bits.Fe == 1 || Lsr.Bits.Bi == 1) {\r |
637ff819 | 1006 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r |
1007 | continue;\r | |
1008 | }\r | |
1009 | }\r | |
637ff819 | 1010 | \r |
1011 | Data = READ_RBR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1012 | \r | |
fa70a2c4 | 1013 | IsaSerialFifoAdd (&SerialDevice->Receive, Data);\r |
1014 | \r | |
637ff819 | 1015 | //\r |
fa70a2c4 | 1016 | // For full handshake flow control, if receive buffer full\r |
1017 | // tell the peer to stop sending data.\r | |
637ff819 | 1018 | //\r |
fa70a2c4 | 1019 | if (SerialDevice->HardwareFlowControl &&\r |
77b91d89 | 1020 | !FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake) &&\r |
fa70a2c4 | 1021 | IsaSerialFifoFull (&SerialDevice->Receive)\r |
1022 | ) {\r | |
1023 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1024 | Mcr.Bits.Rts = 0;\r | |
637ff819 | 1025 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r |
1026 | }\r | |
1027 | \r | |
637ff819 | 1028 | \r |
1029 | continue;\r | |
1030 | } else {\r | |
1031 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1032 | EFI_PROGRESS_CODE,\r | |
1033 | EFI_P_SERIAL_PORT_PC_CLEAR_BUFFER | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1034 | SerialDevice->DevicePath\r | |
1035 | );\r | |
1036 | }\r | |
1037 | }\r | |
1038 | //\r | |
1039 | // Do the write\r | |
1040 | //\r | |
91c68197 | 1041 | if (Lsr.Bits.Thre == 1 && !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r |
637ff819 | 1042 | //\r |
1043 | // Make sure the transmit data will not be missed\r | |
1044 | //\r | |
1045 | if (SerialDevice->HardwareFlowControl) {\r | |
1046 | //\r | |
fa70a2c4 | 1047 | // For half handshake flow control assert RTS before sending.\r |
637ff819 | 1048 | //\r |
77b91d89 | 1049 | if (FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)) {\r |
fa70a2c4 | 1050 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r |
1051 | Mcr.Bits.Rts= 0;\r | |
1052 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1053 | }\r | |
637ff819 | 1054 | //\r |
1055 | // Wait for CTS\r | |
1056 | //\r | |
1057 | TimeOut = 0;\r | |
1058 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
711d0721 | 1059 | while ((Msr.Bits.Dcd == 1) && ((Msr.Bits.Cts == 0) ^ FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {\r |
637ff819 | 1060 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r |
1061 | TimeOut++;\r | |
1062 | if (TimeOut > 5) {\r | |
1063 | break;\r | |
1064 | }\r | |
1065 | \r | |
1066 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1067 | }\r | |
1068 | \r | |
711d0721 | 1069 | if ((Msr.Bits.Dcd == 0) || ((Msr.Bits.Cts == 1) ^ FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake))) {\r |
637ff819 | 1070 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r |
1071 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
1072 | }\r | |
fa70a2c4 | 1073 | \r |
637ff819 | 1074 | //\r |
fa70a2c4 | 1075 | // For half handshake flow control, tell DCE we are done.\r |
637ff819 | 1076 | //\r |
77b91d89 | 1077 | if (FeaturePcdGet(PcdIsaBusSerialUseHalfHandshake)) {\r |
fa70a2c4 | 1078 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r |
1079 | Mcr.Bits.Rts = 1;\r | |
1080 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1081 | }\r | |
1082 | } else {\r | |
1083 | IsaSerialFifoRemove (&SerialDevice->Transmit, &Data);\r | |
1084 | WRITE_THR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Data);\r | |
637ff819 | 1085 | }\r |
1086 | }\r | |
91c68197 | 1087 | } while (Lsr.Bits.Thre == 1 && !IsaSerialFifoEmpty (&SerialDevice->Transmit));\r |
637ff819 | 1088 | }\r |
1089 | \r | |
1090 | return EFI_SUCCESS;\r | |
1091 | }\r | |
bcd70414 | 1092 | \r |
637ff819 | 1093 | //\r |
1094 | // Interface Functions\r | |
1095 | //\r | |
bcd70414 | 1096 | /**\r |
91c68197 | 1097 | Reset serial device.\r |
bcd70414 | 1098 | \r |
91c68197 | 1099 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
bcd70414 | 1100 | \r |
91c68197 LG |
1101 | @retval EFI_SUCCESS Reset successfully\r |
1102 | @retval EFI_DEVICE_ERROR Failed to reset\r | |
bcd70414 | 1103 | \r |
1104 | **/\r | |
637ff819 | 1105 | EFI_STATUS\r |
1106 | EFIAPI\r | |
1107 | IsaSerialReset (\r | |
1108 | IN EFI_SERIAL_IO_PROTOCOL *This\r | |
1109 | )\r | |
637ff819 | 1110 | {\r |
1111 | EFI_STATUS Status;\r | |
1112 | SERIAL_DEV *SerialDevice;\r | |
1113 | SERIAL_PORT_LCR Lcr;\r | |
1114 | SERIAL_PORT_IER Ier;\r | |
1115 | SERIAL_PORT_MCR Mcr;\r | |
1116 | SERIAL_PORT_FCR Fcr;\r | |
1117 | EFI_TPL Tpl;\r | |
6b008b74 | 1118 | UINT32 Control;\r |
637ff819 | 1119 | \r |
1120 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1121 | \r | |
1122 | //\r | |
1123 | // Report the status code reset the serial\r | |
1124 | //\r | |
1125 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1126 | EFI_PROGRESS_CODE,\r | |
1127 | EFI_P_PC_RESET | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1128 | SerialDevice->DevicePath\r | |
1129 | );\r | |
1130 | \r | |
1131 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1132 | \r | |
1133 | //\r | |
1134 | // Make sure DLAB is 0.\r | |
1135 | //\r | |
1136 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
91c68197 | 1137 | Lcr.Bits.DLab = 0;\r |
637ff819 | 1138 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r |
1139 | \r | |
1140 | //\r | |
1141 | // Turn off all interrupts\r | |
1142 | //\r | |
1143 | Ier.Data = READ_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
91c68197 LG |
1144 | Ier.Bits.Ravie = 0;\r |
1145 | Ier.Bits.Theie = 0;\r | |
1146 | Ier.Bits.Rie = 0;\r | |
1147 | Ier.Bits.Mie = 0;\r | |
637ff819 | 1148 | WRITE_IER (SerialDevice->IsaIo, SerialDevice->BaseAddress, Ier.Data);\r |
1149 | \r | |
1150 | //\r | |
1151 | // Disable the FIFO.\r | |
1152 | //\r | |
91c68197 | 1153 | Fcr.Bits.TrFIFOE = 0;\r |
637ff819 | 1154 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r |
1155 | \r | |
1156 | //\r | |
1157 | // Turn off loopback and disable device interrupt.\r | |
1158 | //\r | |
1159 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
91c68197 LG |
1160 | Mcr.Bits.Out1 = 0;\r |
1161 | Mcr.Bits.Out2 = 0;\r | |
1162 | Mcr.Bits.Lme = 0;\r | |
637ff819 | 1163 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r |
1164 | \r | |
1165 | //\r | |
1166 | // Clear the scratch pad register\r | |
1167 | //\r | |
1168 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0);\r | |
1169 | \r | |
1170 | //\r | |
1171 | // Go set the current attributes\r | |
1172 | //\r | |
1173 | Status = This->SetAttributes (\r | |
1174 | This,\r | |
1175 | This->Mode->BaudRate,\r | |
1176 | This->Mode->ReceiveFifoDepth,\r | |
1177 | This->Mode->Timeout,\r | |
1178 | (EFI_PARITY_TYPE) This->Mode->Parity,\r | |
1179 | (UINT8) This->Mode->DataBits,\r | |
1180 | (EFI_STOP_BITS_TYPE) This->Mode->StopBits\r | |
1181 | );\r | |
1182 | \r | |
1183 | if (EFI_ERROR (Status)) {\r | |
1184 | gBS->RestoreTPL (Tpl);\r | |
1185 | return EFI_DEVICE_ERROR;\r | |
1186 | }\r | |
1187 | //\r | |
1188 | // Go set the current control bits\r | |
1189 | //\r | |
6b008b74 RN |
1190 | Control = 0;\r |
1191 | if (SerialDevice->HardwareFlowControl) {\r | |
1192 | Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
1193 | }\r | |
1194 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
1195 | Control |= EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE;\r | |
1196 | }\r | |
637ff819 | 1197 | Status = This->SetControl (\r |
1198 | This,\r | |
6b008b74 | 1199 | Control\r |
637ff819 | 1200 | );\r |
1201 | \r | |
1202 | if (EFI_ERROR (Status)) {\r | |
1203 | gBS->RestoreTPL (Tpl);\r | |
1204 | return EFI_DEVICE_ERROR;\r | |
1205 | }\r | |
1206 | //\r | |
1207 | // for 16550A enable FIFO, 16550 disable FIFO\r | |
1208 | //\r | |
91c68197 LG |
1209 | Fcr.Bits.TrFIFOE = 1;\r |
1210 | Fcr.Bits.ResetRF = 1;\r | |
1211 | Fcr.Bits.ResetTF = 1;\r | |
637ff819 | 1212 | WRITE_FCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Fcr.Data);\r |
1213 | \r | |
1214 | //\r | |
1215 | // Reset the software FIFO\r | |
1216 | //\r | |
1217 | SerialDevice->Receive.First = 0;\r | |
1218 | SerialDevice->Receive.Last = 0;\r | |
1219 | SerialDevice->Receive.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1220 | SerialDevice->Transmit.First = 0;\r | |
1221 | SerialDevice->Transmit.Last = 0;\r | |
1222 | SerialDevice->Transmit.Surplus = SERIAL_MAX_BUFFER_SIZE;\r | |
1223 | \r | |
1224 | gBS->RestoreTPL (Tpl);\r | |
1225 | \r | |
1226 | //\r | |
1227 | // Device reset is complete\r | |
1228 | //\r | |
1229 | return EFI_SUCCESS;\r | |
1230 | }\r | |
1231 | \r | |
bcd70414 | 1232 | /**\r |
91c68197 | 1233 | Set new attributes to a serial device.\r |
bcd70414 | 1234 | \r |
91c68197 LG |
1235 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
1236 | @param BaudRate The baudrate of the serial device\r | |
1237 | @param ReceiveFifoDepth The depth of receive FIFO buffer\r | |
1238 | @param Timeout The request timeout for a single char\r | |
1239 | @param Parity The type of parity used in serial device\r | |
1240 | @param DataBits Number of databits used in serial device\r | |
1241 | @param StopBits Number of stopbits used in serial device\r | |
bcd70414 | 1242 | \r |
91c68197 LG |
1243 | @retval EFI_SUCCESS The new attributes were set\r |
1244 | @retval EFI_INVALID_PARAMETERS One or more attributes have an unsupported value\r | |
1245 | @retval EFI_UNSUPPORTED Data Bits can not set to 5 or 6\r | |
1246 | @retval EFI_DEVICE_ERROR The serial device is not functioning correctly (no return)\r | |
bcd70414 | 1247 | \r |
1248 | **/\r | |
637ff819 | 1249 | EFI_STATUS\r |
1250 | EFIAPI\r | |
1251 | IsaSerialSetAttributes (\r | |
1252 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1253 | IN UINT64 BaudRate,\r | |
1254 | IN UINT32 ReceiveFifoDepth,\r | |
1255 | IN UINT32 Timeout,\r | |
1256 | IN EFI_PARITY_TYPE Parity,\r | |
1257 | IN UINT8 DataBits,\r | |
1258 | IN EFI_STOP_BITS_TYPE StopBits\r | |
1259 | )\r | |
637ff819 | 1260 | {\r |
1261 | EFI_STATUS Status;\r | |
1262 | SERIAL_DEV *SerialDevice;\r | |
1263 | UINT32 Divisor;\r | |
1264 | UINT32 Remained;\r | |
1265 | SERIAL_PORT_LCR Lcr;\r | |
6b008b74 | 1266 | UART_DEVICE_PATH *Uart;\r |
637ff819 | 1267 | EFI_TPL Tpl;\r |
1268 | \r | |
1269 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1270 | \r | |
1271 | //\r | |
1272 | // Check for default settings and fill in actual values.\r | |
1273 | //\r | |
1274 | if (BaudRate == 0) {\r | |
c37f052f | 1275 | BaudRate = PcdGet64 (PcdUartDefaultBaudRate);\r |
637ff819 | 1276 | }\r |
1277 | \r | |
1278 | if (ReceiveFifoDepth == 0) {\r | |
1279 | ReceiveFifoDepth = SERIAL_PORT_DEFAULT_RECEIVE_FIFO_DEPTH;\r | |
1280 | }\r | |
1281 | \r | |
1282 | if (Timeout == 0) {\r | |
1283 | Timeout = SERIAL_PORT_DEFAULT_TIMEOUT;\r | |
1284 | }\r | |
1285 | \r | |
1286 | if (Parity == DefaultParity) {\r | |
c37f052f | 1287 | Parity = (EFI_PARITY_TYPE)PcdGet8 (PcdUartDefaultParity);\r |
637ff819 | 1288 | }\r |
1289 | \r | |
1290 | if (DataBits == 0) {\r | |
c37f052f | 1291 | DataBits = PcdGet8 (PcdUartDefaultDataBits);\r |
637ff819 | 1292 | }\r |
1293 | \r | |
1294 | if (StopBits == DefaultStopBits) {\r | |
c37f052f | 1295 | StopBits = (EFI_STOP_BITS_TYPE) PcdGet8 (PcdUartDefaultStopBits);\r |
637ff819 | 1296 | }\r |
1297 | //\r | |
1298 | // 5 and 6 data bits can not be verified on a 16550A UART\r | |
1299 | // Return EFI_INVALID_PARAMETER if an attempt is made to use these settings.\r | |
1300 | //\r | |
1301 | if ((DataBits == 5) || (DataBits == 6)) {\r | |
1302 | return EFI_INVALID_PARAMETER;\r | |
1303 | }\r | |
1304 | //\r | |
1305 | // Make sure all parameters are valid\r | |
1306 | //\r | |
1307 | if ((BaudRate > SERIAL_PORT_MAX_BAUD_RATE) || (BaudRate < SERIAL_PORT_MIN_BAUD_RATE)) {\r | |
1308 | return EFI_INVALID_PARAMETER;\r | |
1309 | }\r | |
1310 | //\r | |
1311 | // 50,75,110,134,150,300,600,1200,1800,2000,2400,3600,4800,7200,9600,19200,\r | |
1312 | // 38400,57600,115200\r | |
1313 | //\r | |
1314 | if (BaudRate < 75) {\r | |
1315 | BaudRate = 50;\r | |
1316 | } else if (BaudRate < 110) {\r | |
1317 | BaudRate = 75;\r | |
1318 | } else if (BaudRate < 134) {\r | |
1319 | BaudRate = 110;\r | |
1320 | } else if (BaudRate < 150) {\r | |
1321 | BaudRate = 134;\r | |
1322 | } else if (BaudRate < 300) {\r | |
1323 | BaudRate = 150;\r | |
1324 | } else if (BaudRate < 600) {\r | |
1325 | BaudRate = 300;\r | |
1326 | } else if (BaudRate < 1200) {\r | |
1327 | BaudRate = 600;\r | |
1328 | } else if (BaudRate < 1800) {\r | |
1329 | BaudRate = 1200;\r | |
1330 | } else if (BaudRate < 2000) {\r | |
1331 | BaudRate = 1800;\r | |
1332 | } else if (BaudRate < 2400) {\r | |
1333 | BaudRate = 2000;\r | |
1334 | } else if (BaudRate < 3600) {\r | |
1335 | BaudRate = 2400;\r | |
1336 | } else if (BaudRate < 4800) {\r | |
1337 | BaudRate = 3600;\r | |
1338 | } else if (BaudRate < 7200) {\r | |
1339 | BaudRate = 4800;\r | |
1340 | } else if (BaudRate < 9600) {\r | |
1341 | BaudRate = 7200;\r | |
1342 | } else if (BaudRate < 19200) {\r | |
1343 | BaudRate = 9600;\r | |
1344 | } else if (BaudRate < 38400) {\r | |
1345 | BaudRate = 19200;\r | |
1346 | } else if (BaudRate < 57600) {\r | |
1347 | BaudRate = 38400;\r | |
1348 | } else if (BaudRate < 115200) {\r | |
1349 | BaudRate = 57600;\r | |
1350 | } else if (BaudRate <= SERIAL_PORT_MAX_BAUD_RATE) {\r | |
1351 | BaudRate = 115200;\r | |
1352 | }\r | |
1353 | \r | |
1354 | if ((ReceiveFifoDepth < 1) || (ReceiveFifoDepth > SERIAL_PORT_MAX_RECEIVE_FIFO_DEPTH)) {\r | |
1355 | return EFI_INVALID_PARAMETER;\r | |
1356 | }\r | |
1357 | \r | |
1358 | if ((Timeout < SERIAL_PORT_MIN_TIMEOUT) || (Timeout > SERIAL_PORT_MAX_TIMEOUT)) {\r | |
1359 | return EFI_INVALID_PARAMETER;\r | |
1360 | }\r | |
1361 | \r | |
1362 | if ((Parity < NoParity) || (Parity > SpaceParity)) {\r | |
1363 | return EFI_INVALID_PARAMETER;\r | |
1364 | }\r | |
1365 | \r | |
1366 | if ((DataBits < 5) || (DataBits > 8)) {\r | |
1367 | return EFI_INVALID_PARAMETER;\r | |
1368 | }\r | |
1369 | \r | |
1370 | if ((StopBits < OneStopBit) || (StopBits > TwoStopBits)) {\r | |
1371 | return EFI_INVALID_PARAMETER;\r | |
1372 | }\r | |
19bf20e1 | 1373 | \r |
637ff819 | 1374 | //\r |
1375 | // for DataBits = 6,7,8, StopBits can not set OneFiveStopBits\r | |
1376 | //\r | |
1377 | if ((DataBits >= 6) && (DataBits <= 8) && (StopBits == OneFiveStopBits)) {\r | |
1378 | return EFI_INVALID_PARAMETER;\r | |
1379 | }\r | |
1380 | \r | |
1381 | //\r | |
1382 | // Compute divisor use to program the baud rate using a round determination\r | |
1383 | //\r | |
1384 | Divisor = (UINT32) DivU64x32Remainder (\r | |
1385 | SERIAL_PORT_INPUT_CLOCK,\r | |
1386 | ((UINT32) BaudRate * 16),\r | |
1387 | &Remained\r | |
1388 | );\r | |
91c68197 | 1389 | if (Remained != 0) {\r |
637ff819 | 1390 | Divisor += 1;\r |
1391 | }\r | |
1392 | \r | |
91c68197 | 1393 | if ((Divisor == 0) || ((Divisor & 0xffff0000) != 0)) {\r |
637ff819 | 1394 | return EFI_INVALID_PARAMETER;\r |
1395 | }\r | |
1396 | \r | |
1397 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1398 | \r | |
1399 | //\r | |
1400 | // Compute the actual baud rate that the serial port will be programmed for.\r | |
1401 | //\r | |
1402 | BaudRate = SERIAL_PORT_INPUT_CLOCK / Divisor / 16;\r | |
1403 | \r | |
1404 | //\r | |
1405 | // Put serial port on Divisor Latch Mode\r | |
1406 | //\r | |
1407 | Lcr.Data = READ_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
91c68197 | 1408 | Lcr.Bits.DLab = 1;\r |
637ff819 | 1409 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r |
1410 | \r | |
1411 | //\r | |
1412 | // Write the divisor to the serial port\r | |
1413 | //\r | |
1414 | WRITE_DLL (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) (Divisor & 0xff));\r | |
1415 | WRITE_DLM (SerialDevice->IsaIo, SerialDevice->BaseAddress, (UINT8) ((Divisor >> 8) & 0xff));\r | |
1416 | \r | |
1417 | //\r | |
1418 | // Put serial port back in normal mode and set remaining attributes.\r | |
1419 | //\r | |
91c68197 | 1420 | Lcr.Bits.DLab = 0;\r |
637ff819 | 1421 | \r |
1422 | switch (Parity) {\r | |
1423 | case NoParity:\r | |
91c68197 LG |
1424 | Lcr.Bits.ParEn = 0;\r |
1425 | Lcr.Bits.EvenPar = 0;\r | |
1426 | Lcr.Bits.SticPar = 0;\r | |
637ff819 | 1427 | break;\r |
1428 | \r | |
1429 | case EvenParity:\r | |
91c68197 LG |
1430 | Lcr.Bits.ParEn = 1;\r |
1431 | Lcr.Bits.EvenPar = 1;\r | |
1432 | Lcr.Bits.SticPar = 0;\r | |
637ff819 | 1433 | break;\r |
1434 | \r | |
1435 | case OddParity:\r | |
91c68197 LG |
1436 | Lcr.Bits.ParEn = 1;\r |
1437 | Lcr.Bits.EvenPar = 0;\r | |
1438 | Lcr.Bits.SticPar = 0;\r | |
637ff819 | 1439 | break;\r |
1440 | \r | |
1441 | case SpaceParity:\r | |
91c68197 LG |
1442 | Lcr.Bits.ParEn = 1;\r |
1443 | Lcr.Bits.EvenPar = 1;\r | |
1444 | Lcr.Bits.SticPar = 1;\r | |
637ff819 | 1445 | break;\r |
1446 | \r | |
1447 | case MarkParity:\r | |
91c68197 LG |
1448 | Lcr.Bits.ParEn = 1;\r |
1449 | Lcr.Bits.EvenPar = 0;\r | |
1450 | Lcr.Bits.SticPar = 1;\r | |
637ff819 | 1451 | break;\r |
1452 | \r | |
1453 | default:\r | |
1454 | break;\r | |
1455 | }\r | |
1456 | \r | |
1457 | switch (StopBits) {\r | |
1458 | case OneStopBit:\r | |
91c68197 | 1459 | Lcr.Bits.StopB = 0;\r |
637ff819 | 1460 | break;\r |
1461 | \r | |
1462 | case OneFiveStopBits:\r | |
1463 | case TwoStopBits:\r | |
91c68197 | 1464 | Lcr.Bits.StopB = 1;\r |
637ff819 | 1465 | break;\r |
1466 | \r | |
1467 | default:\r | |
1468 | break;\r | |
1469 | }\r | |
1470 | //\r | |
1471 | // DataBits\r | |
1472 | //\r | |
91c68197 | 1473 | Lcr.Bits.SerialDB = (UINT8) ((DataBits - 5) & 0x03);\r |
637ff819 | 1474 | WRITE_LCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Lcr.Data);\r |
1475 | \r | |
1476 | //\r | |
1477 | // Set the Serial I/O mode\r | |
1478 | //\r | |
1479 | This->Mode->BaudRate = BaudRate;\r | |
1480 | This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;\r | |
1481 | This->Mode->Timeout = Timeout;\r | |
1482 | This->Mode->Parity = Parity;\r | |
1483 | This->Mode->DataBits = DataBits;\r | |
1484 | This->Mode->StopBits = StopBits;\r | |
1485 | \r | |
1486 | //\r | |
1487 | // See if Device Path Node has actually changed\r | |
1488 | //\r | |
1489 | if (SerialDevice->UartDevicePath.BaudRate == BaudRate &&\r | |
1490 | SerialDevice->UartDevicePath.DataBits == DataBits &&\r | |
1491 | SerialDevice->UartDevicePath.Parity == Parity &&\r | |
1492 | SerialDevice->UartDevicePath.StopBits == StopBits\r | |
1493 | ) {\r | |
1494 | gBS->RestoreTPL (Tpl);\r | |
1495 | return EFI_SUCCESS;\r | |
1496 | }\r | |
1497 | //\r | |
1498 | // Update the device path\r | |
1499 | //\r | |
1500 | SerialDevice->UartDevicePath.BaudRate = BaudRate;\r | |
1501 | SerialDevice->UartDevicePath.DataBits = DataBits;\r | |
1502 | SerialDevice->UartDevicePath.Parity = (UINT8) Parity;\r | |
1503 | SerialDevice->UartDevicePath.StopBits = (UINT8) StopBits;\r | |
1504 | \r | |
6b008b74 | 1505 | Status = EFI_SUCCESS;\r |
637ff819 | 1506 | if (SerialDevice->Handle != NULL) {\r |
6b008b74 RN |
1507 | Uart = (UART_DEVICE_PATH *) (\r |
1508 | (UINTN) SerialDevice->DevicePath\r | |
1509 | + GetDevicePathSize (SerialDevice->ParentDevicePath)\r | |
1510 | - END_DEVICE_PATH_LENGTH\r | |
1511 | );\r | |
1512 | CopyMem (Uart, &SerialDevice->UartDevicePath, sizeof (UART_DEVICE_PATH));\r | |
637ff819 | 1513 | Status = gBS->ReinstallProtocolInterface (\r |
1514 | SerialDevice->Handle,\r | |
1515 | &gEfiDevicePathProtocolGuid,\r | |
1516 | SerialDevice->DevicePath,\r | |
6b008b74 | 1517 | SerialDevice->DevicePath\r |
637ff819 | 1518 | );\r |
637ff819 | 1519 | }\r |
1520 | \r | |
637ff819 | 1521 | gBS->RestoreTPL (Tpl);\r |
1522 | \r | |
6b008b74 | 1523 | return Status;\r |
637ff819 | 1524 | }\r |
1525 | \r | |
bcd70414 | 1526 | /**\r |
91c68197 | 1527 | Set Control Bits.\r |
bcd70414 | 1528 | \r |
91c68197 LG |
1529 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
1530 | @param Control Control bits that can be settable\r | |
bcd70414 | 1531 | \r |
91c68197 LG |
1532 | @retval EFI_SUCCESS New Control bits were set successfully\r |
1533 | @retval EFI_UNSUPPORTED The Control bits wanted to set are not supported\r | |
bcd70414 | 1534 | \r |
1535 | **/\r | |
637ff819 | 1536 | EFI_STATUS\r |
1537 | EFIAPI\r | |
1538 | IsaSerialSetControl (\r | |
1539 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1540 | IN UINT32 Control\r | |
1541 | )\r | |
637ff819 | 1542 | {\r |
6b008b74 RN |
1543 | SERIAL_DEV *SerialDevice;\r |
1544 | SERIAL_PORT_MCR Mcr;\r | |
1545 | EFI_TPL Tpl;\r | |
1546 | UART_FLOW_CONTROL_DEVICE_PATH *FlowControl;\r | |
1547 | EFI_STATUS Status;\r | |
637ff819 | 1548 | \r |
1549 | //\r | |
1550 | // The control bits that can be set are :\r | |
1551 | // EFI_SERIAL_DATA_TERMINAL_READY: 0x0001 // WO\r | |
1552 | // EFI_SERIAL_REQUEST_TO_SEND: 0x0002 // WO\r | |
1553 | // EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE: 0x1000 // RW\r | |
1554 | // EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE: 0x2000 // RW\r | |
6b008b74 | 1555 | // EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE: 0x4000 // RW\r |
637ff819 | 1556 | //\r |
1557 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1558 | \r | |
1559 | //\r | |
1560 | // first determine the parameter is invalid\r | |
1561 | //\r | |
6b008b74 RN |
1562 | if (Control & (~(EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY |\r |
1563 | EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE | EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE | \r | |
1564 | EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE))) {\r | |
637ff819 | 1565 | return EFI_UNSUPPORTED;\r |
1566 | }\r | |
1567 | \r | |
1568 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1569 | \r | |
1570 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
91c68197 LG |
1571 | Mcr.Bits.DtrC = 0;\r |
1572 | Mcr.Bits.Rts = 0;\r | |
1573 | Mcr.Bits.Lme = 0;\r | |
637ff819 | 1574 | SerialDevice->SoftwareLoopbackEnable = FALSE;\r |
1575 | SerialDevice->HardwareFlowControl = FALSE;\r | |
1576 | \r | |
91c68197 LG |
1577 | if ((Control & EFI_SERIAL_DATA_TERMINAL_READY) == EFI_SERIAL_DATA_TERMINAL_READY) {\r |
1578 | Mcr.Bits.DtrC = 1;\r | |
637ff819 | 1579 | }\r |
1580 | \r | |
91c68197 LG |
1581 | if ((Control & EFI_SERIAL_REQUEST_TO_SEND) == EFI_SERIAL_REQUEST_TO_SEND) {\r |
1582 | Mcr.Bits.Rts = 1;\r | |
637ff819 | 1583 | }\r |
1584 | \r | |
91c68197 LG |
1585 | if ((Control & EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) == EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE) {\r |
1586 | Mcr.Bits.Lme = 1;\r | |
637ff819 | 1587 | }\r |
1588 | \r | |
91c68197 | 1589 | if ((Control & EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) == EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE) {\r |
637ff819 | 1590 | SerialDevice->HardwareFlowControl = TRUE;\r |
1591 | }\r | |
1592 | \r | |
1593 | WRITE_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Mcr.Data);\r | |
1594 | \r | |
91c68197 | 1595 | if ((Control & EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) == EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE) {\r |
637ff819 | 1596 | SerialDevice->SoftwareLoopbackEnable = TRUE;\r |
1597 | }\r | |
1598 | \r | |
6b008b74 RN |
1599 | Status = EFI_SUCCESS;\r |
1600 | if (SerialDevice->Handle != NULL) {\r | |
1601 | FlowControl = (UART_FLOW_CONTROL_DEVICE_PATH *) (\r | |
1602 | (UINTN) SerialDevice->DevicePath\r | |
1603 | + GetDevicePathSize (SerialDevice->ParentDevicePath)\r | |
1604 | - END_DEVICE_PATH_LENGTH\r | |
1605 | + sizeof (UART_DEVICE_PATH)\r | |
1606 | );\r | |
1607 | if (IsUartFlowControlNode (FlowControl) &&\r | |
1608 | ((ReadUnaligned32 (&FlowControl->FlowControlMap) == UART_FLOW_CONTROL_HARDWARE) ^ SerialDevice->HardwareFlowControl)) {\r | |
1609 | //\r | |
1610 | // Flow Control setting is changed, need to reinstall device path protocol\r | |
1611 | //\r | |
1612 | WriteUnaligned32 (&FlowControl->FlowControlMap, SerialDevice->HardwareFlowControl ? UART_FLOW_CONTROL_HARDWARE : 0);\r | |
1613 | Status = gBS->ReinstallProtocolInterface (\r | |
1614 | SerialDevice->Handle,\r | |
1615 | &gEfiDevicePathProtocolGuid,\r | |
1616 | SerialDevice->DevicePath,\r | |
1617 | SerialDevice->DevicePath\r | |
1618 | );\r | |
1619 | }\r | |
1620 | }\r | |
1621 | \r | |
637ff819 | 1622 | gBS->RestoreTPL (Tpl);\r |
1623 | \r | |
6b008b74 | 1624 | return Status;\r |
637ff819 | 1625 | }\r |
1626 | \r | |
bcd70414 | 1627 | /**\r |
91c68197 | 1628 | Get ControlBits.\r |
bcd70414 | 1629 | \r |
91c68197 LG |
1630 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
1631 | @param Control Control signals of the serial device\r | |
bcd70414 | 1632 | \r |
91c68197 | 1633 | @retval EFI_SUCCESS Get Control signals successfully\r |
bcd70414 | 1634 | \r |
1635 | **/\r | |
637ff819 | 1636 | EFI_STATUS\r |
1637 | EFIAPI\r | |
1638 | IsaSerialGetControl (\r | |
1639 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1640 | OUT UINT32 *Control\r | |
1641 | )\r | |
637ff819 | 1642 | {\r |
1643 | SERIAL_DEV *SerialDevice;\r | |
1644 | SERIAL_PORT_MSR Msr;\r | |
1645 | SERIAL_PORT_MCR Mcr;\r | |
1646 | EFI_TPL Tpl;\r | |
1647 | \r | |
1648 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1649 | \r | |
1650 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1651 | \r | |
1652 | *Control = 0;\r | |
1653 | \r | |
1654 | //\r | |
1655 | // Read the Modem Status Register\r | |
1656 | //\r | |
1657 | Msr.Data = READ_MSR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1658 | \r | |
91c68197 | 1659 | if (Msr.Bits.Cts == 1) {\r |
637ff819 | 1660 | *Control |= EFI_SERIAL_CLEAR_TO_SEND;\r |
1661 | }\r | |
1662 | \r | |
91c68197 | 1663 | if (Msr.Bits.Dsr == 1) {\r |
637ff819 | 1664 | *Control |= EFI_SERIAL_DATA_SET_READY;\r |
1665 | }\r | |
1666 | \r | |
91c68197 | 1667 | if (Msr.Bits.Ri == 1) {\r |
637ff819 | 1668 | *Control |= EFI_SERIAL_RING_INDICATE;\r |
1669 | }\r | |
1670 | \r | |
91c68197 | 1671 | if (Msr.Bits.Dcd == 1) {\r |
637ff819 | 1672 | *Control |= EFI_SERIAL_CARRIER_DETECT;\r |
1673 | }\r | |
1674 | //\r | |
1675 | // Read the Modem Control Register\r | |
1676 | //\r | |
1677 | Mcr.Data = READ_MCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1678 | \r | |
91c68197 | 1679 | if (Mcr.Bits.DtrC == 1) {\r |
637ff819 | 1680 | *Control |= EFI_SERIAL_DATA_TERMINAL_READY;\r |
1681 | }\r | |
1682 | \r | |
91c68197 | 1683 | if (Mcr.Bits.Rts == 1) {\r |
637ff819 | 1684 | *Control |= EFI_SERIAL_REQUEST_TO_SEND;\r |
1685 | }\r | |
1686 | \r | |
91c68197 | 1687 | if (Mcr.Bits.Lme == 1) {\r |
637ff819 | 1688 | *Control |= EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE;\r |
1689 | }\r | |
1690 | \r | |
1691 | if (SerialDevice->HardwareFlowControl) {\r | |
1692 | *Control |= EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE;\r | |
1693 | }\r | |
1694 | //\r | |
1695 | // See if the Transmit FIFO is empty\r | |
1696 | //\r | |
1697 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1698 | \r | |
1699 | if (IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1700 | *Control |= EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r | |
1701 | }\r | |
1702 | //\r | |
1703 | // See if the Receive FIFO is empty.\r | |
1704 | //\r | |
1705 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1706 | \r | |
1707 | if (IsaSerialFifoEmpty (&SerialDevice->Receive)) {\r | |
1708 | *Control |= EFI_SERIAL_INPUT_BUFFER_EMPTY;\r | |
1709 | }\r | |
1710 | \r | |
1711 | if (SerialDevice->SoftwareLoopbackEnable) {\r | |
1712 | *Control |= EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE;\r | |
1713 | }\r | |
1714 | \r | |
1715 | gBS->RestoreTPL (Tpl);\r | |
1716 | \r | |
1717 | return EFI_SUCCESS;\r | |
1718 | }\r | |
1719 | \r | |
bcd70414 | 1720 | /**\r |
91c68197 | 1721 | Write the specified number of bytes to serial device.\r |
bcd70414 | 1722 | \r |
91c68197 LG |
1723 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
1724 | @param BufferSize On input the size of Buffer, on output the amount of\r | |
bcd70414 | 1725 | data actually written\r |
91c68197 | 1726 | @param Buffer The buffer of data to write\r |
bcd70414 | 1727 | \r |
91c68197 LG |
1728 | @retval EFI_SUCCESS The data were written successfully\r |
1729 | @retval EFI_DEVICE_ERROR The device reported an error\r | |
1730 | @retval EFI_TIMEOUT The write operation was stopped due to timeout\r | |
bcd70414 | 1731 | \r |
1732 | **/\r | |
637ff819 | 1733 | EFI_STATUS\r |
1734 | EFIAPI\r | |
1735 | IsaSerialWrite (\r | |
1736 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1737 | IN OUT UINTN *BufferSize,\r | |
1738 | IN VOID *Buffer\r | |
1739 | )\r | |
637ff819 | 1740 | {\r |
1741 | SERIAL_DEV *SerialDevice;\r | |
1742 | UINT8 *CharBuffer;\r | |
1743 | UINT32 Index;\r | |
1744 | UINTN Elapsed;\r | |
1745 | UINTN ActualWrite;\r | |
1746 | EFI_TPL Tpl;\r | |
1747 | \r | |
1748 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1749 | Elapsed = 0;\r | |
1750 | ActualWrite = 0;\r | |
1751 | \r | |
1752 | if (*BufferSize == 0) {\r | |
1753 | return EFI_SUCCESS;\r | |
1754 | }\r | |
1755 | \r | |
91c68197 | 1756 | if (Buffer == NULL) {\r |
637ff819 | 1757 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r |
1758 | EFI_ERROR_CODE,\r | |
1759 | EFI_P_EC_OUTPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1760 | SerialDevice->DevicePath\r | |
1761 | );\r | |
1762 | \r | |
1763 | return EFI_DEVICE_ERROR;\r | |
1764 | }\r | |
1765 | \r | |
1766 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1767 | \r | |
1768 | CharBuffer = (UINT8 *) Buffer;\r | |
1769 | \r | |
1770 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1771 | IsaSerialFifoAdd (&SerialDevice->Transmit, CharBuffer[Index]);\r | |
1772 | \r | |
1773 | while (IsaSerialReceiveTransmit (SerialDevice) != EFI_SUCCESS || !IsaSerialFifoEmpty (&SerialDevice->Transmit)) {\r | |
1774 | //\r | |
1775 | // Unsuccessful write so check if timeout has expired, if not,\r | |
1776 | // stall for a bit, increment time elapsed, and try again\r | |
1777 | //\r | |
1778 | if (Elapsed >= This->Mode->Timeout) {\r | |
1779 | *BufferSize = ActualWrite;\r | |
1780 | gBS->RestoreTPL (Tpl);\r | |
1781 | return EFI_TIMEOUT;\r | |
1782 | }\r | |
1783 | \r | |
1784 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1785 | \r | |
1786 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1787 | }\r | |
1788 | \r | |
1789 | ActualWrite++;\r | |
1790 | //\r | |
1791 | // Successful write so reset timeout\r | |
1792 | //\r | |
1793 | Elapsed = 0;\r | |
1794 | }\r | |
1795 | \r | |
1796 | gBS->RestoreTPL (Tpl);\r | |
1797 | \r | |
1798 | return EFI_SUCCESS;\r | |
1799 | }\r | |
1800 | \r | |
bcd70414 | 1801 | /**\r |
91c68197 | 1802 | Read the specified number of bytes from serial device.\r |
bcd70414 | 1803 | \r |
91c68197 LG |
1804 | @param This Pointer to EFI_SERIAL_IO_PROTOCOL\r |
1805 | @param BufferSize On input the size of Buffer, on output the amount of\r | |
1806 | data returned in buffer\r | |
1807 | @param Buffer The buffer to return the data into\r | |
bcd70414 | 1808 | \r |
91c68197 LG |
1809 | @retval EFI_SUCCESS The data were read successfully\r |
1810 | @retval EFI_DEVICE_ERROR The device reported an error\r | |
1811 | @retval EFI_TIMEOUT The read operation was stopped due to timeout\r | |
bcd70414 | 1812 | \r |
1813 | **/\r | |
637ff819 | 1814 | EFI_STATUS\r |
1815 | EFIAPI\r | |
1816 | IsaSerialRead (\r | |
1817 | IN EFI_SERIAL_IO_PROTOCOL *This,\r | |
1818 | IN OUT UINTN *BufferSize,\r | |
1819 | OUT VOID *Buffer\r | |
1820 | )\r | |
637ff819 | 1821 | {\r |
1822 | SERIAL_DEV *SerialDevice;\r | |
1823 | UINT32 Index;\r | |
1824 | UINT8 *CharBuffer;\r | |
1825 | UINTN Elapsed;\r | |
1826 | EFI_STATUS Status;\r | |
1827 | EFI_TPL Tpl;\r | |
1828 | \r | |
1829 | SerialDevice = SERIAL_DEV_FROM_THIS (This);\r | |
1830 | Elapsed = 0;\r | |
1831 | \r | |
1832 | if (*BufferSize == 0) {\r | |
1833 | return EFI_SUCCESS;\r | |
1834 | }\r | |
1835 | \r | |
91c68197 | 1836 | if (Buffer == NULL) {\r |
637ff819 | 1837 | return EFI_DEVICE_ERROR;\r |
1838 | }\r | |
1839 | \r | |
1840 | Tpl = gBS->RaiseTPL (TPL_NOTIFY);\r | |
1841 | \r | |
1842 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1843 | \r | |
1844 | if (EFI_ERROR (Status)) {\r | |
1845 | *BufferSize = 0;\r | |
1846 | \r | |
1847 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
1848 | EFI_ERROR_CODE,\r | |
1849 | EFI_P_EC_INPUT_ERROR | EFI_PERIPHERAL_SERIAL_PORT,\r | |
1850 | SerialDevice->DevicePath\r | |
1851 | );\r | |
1852 | \r | |
1853 | gBS->RestoreTPL (Tpl);\r | |
1854 | \r | |
1855 | return EFI_DEVICE_ERROR;\r | |
1856 | }\r | |
1857 | \r | |
1858 | CharBuffer = (UINT8 *) Buffer;\r | |
1859 | for (Index = 0; Index < *BufferSize; Index++) {\r | |
1860 | while (IsaSerialFifoRemove (&SerialDevice->Receive, &(CharBuffer[Index])) != EFI_SUCCESS) {\r | |
1861 | //\r | |
1862 | // Unsuccessful read so check if timeout has expired, if not,\r | |
1863 | // stall for a bit, increment time elapsed, and try again\r | |
1864 | // Need this time out to get conspliter to work.\r | |
1865 | //\r | |
1866 | if (Elapsed >= This->Mode->Timeout) {\r | |
1867 | *BufferSize = Index;\r | |
1868 | gBS->RestoreTPL (Tpl);\r | |
1869 | return EFI_TIMEOUT;\r | |
1870 | }\r | |
1871 | \r | |
1872 | gBS->Stall (TIMEOUT_STALL_INTERVAL);\r | |
1873 | Elapsed += TIMEOUT_STALL_INTERVAL;\r | |
1874 | \r | |
1875 | Status = IsaSerialReceiveTransmit (SerialDevice);\r | |
1876 | if (Status == EFI_DEVICE_ERROR) {\r | |
1877 | *BufferSize = Index;\r | |
1878 | gBS->RestoreTPL (Tpl);\r | |
1879 | return EFI_DEVICE_ERROR;\r | |
1880 | }\r | |
1881 | }\r | |
1882 | //\r | |
1883 | // Successful read so reset timeout\r | |
1884 | //\r | |
1885 | Elapsed = 0;\r | |
1886 | }\r | |
1887 | \r | |
1888 | IsaSerialReceiveTransmit (SerialDevice);\r | |
1889 | \r | |
1890 | gBS->RestoreTPL (Tpl);\r | |
1891 | \r | |
1892 | return EFI_SUCCESS;\r | |
1893 | }\r | |
1894 | \r | |
bcd70414 | 1895 | /**\r |
91c68197 | 1896 | Use scratchpad register to test if this serial port is present.\r |
bcd70414 | 1897 | \r |
91c68197 | 1898 | @param SerialDevice Pointer to serial device structure\r |
bcd70414 | 1899 | \r |
1900 | @return if this serial port is present\r | |
1901 | **/\r | |
637ff819 | 1902 | BOOLEAN\r |
1903 | IsaSerialPortPresent (\r | |
1904 | IN SERIAL_DEV *SerialDevice\r | |
1905 | )\r | |
637ff819 | 1906 | \r |
637ff819 | 1907 | {\r |
1908 | UINT8 Temp;\r | |
1909 | BOOLEAN Status;\r | |
1910 | \r | |
1911 | Status = TRUE;\r | |
1912 | \r | |
1913 | //\r | |
1914 | // Save SCR reg\r | |
1915 | //\r | |
1916 | Temp = READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress);\r | |
1917 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0xAA);\r | |
1918 | \r | |
6b88ceec | 1919 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0xAA) {\r |
ea2d9086 | 1920 | Status = FALSE;\r |
637ff819 | 1921 | }\r |
1922 | \r | |
1923 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, 0x55);\r | |
1924 | \r | |
6b88ceec | 1925 | if (READ_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress) != 0x55) {\r |
ea2d9086 | 1926 | Status = FALSE;\r |
637ff819 | 1927 | }\r |
1928 | //\r | |
1929 | // Restore SCR\r | |
1930 | //\r | |
1931 | WRITE_SCR (SerialDevice->IsaIo, SerialDevice->BaseAddress, Temp);\r | |
1932 | return Status;\r | |
1933 | }\r | |
1934 | \r | |
bcd70414 | 1935 | /**\r |
91c68197 | 1936 | Use IsaIo protocol to read serial port.\r |
bcd70414 | 1937 | \r |
91c68197 LG |
1938 | @param IsaIo Pointer to EFI_ISA_IO_PROTOCOL instance\r |
1939 | @param BaseAddress Serial port register group base address\r | |
1940 | @param Offset Offset in register group\r | |
bcd70414 | 1941 | \r |
1942 | @return Data read from serial port\r | |
1943 | \r | |
1944 | **/\r | |
637ff819 | 1945 | UINT8\r |
1946 | IsaSerialReadPort (\r | |
1947 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1948 | IN UINT16 BaseAddress,\r | |
1949 | IN UINT32 Offset\r | |
1950 | )\r | |
637ff819 | 1951 | {\r |
1952 | UINT8 Data;\r | |
1953 | \r | |
1954 | //\r | |
1955 | // Use IsaIo to access IO\r | |
1956 | //\r | |
1957 | IsaIo->Io.Read (\r | |
1958 | IsaIo,\r | |
1959 | EfiIsaIoWidthUint8,\r | |
1960 | BaseAddress + Offset,\r | |
1961 | 1,\r | |
1962 | &Data\r | |
1963 | );\r | |
1964 | return Data;\r | |
1965 | }\r | |
1966 | \r | |
bcd70414 | 1967 | /**\r |
91c68197 | 1968 | Use IsaIo protocol to write serial port.\r |
bcd70414 | 1969 | \r |
91c68197 LG |
1970 | @param IsaIo Pointer to EFI_ISA_IO_PROTOCOL instance\r |
1971 | @param BaseAddress Serial port register group base address\r | |
1972 | @param Offset Offset in register group\r | |
1973 | @param Data data which is to be written to some serial port register\r | |
bcd70414 | 1974 | \r |
1975 | **/\r | |
637ff819 | 1976 | VOID\r |
1977 | IsaSerialWritePort (\r | |
1978 | IN EFI_ISA_IO_PROTOCOL *IsaIo,\r | |
1979 | IN UINT16 BaseAddress,\r | |
1980 | IN UINT32 Offset,\r | |
1981 | IN UINT8 Data\r | |
1982 | )\r | |
637ff819 | 1983 | {\r |
1984 | //\r | |
1985 | // Use IsaIo to access IO\r | |
1986 | //\r | |
1987 | IsaIo->Io.Write (\r | |
1988 | IsaIo,\r | |
1989 | EfiIsaIoWidthUint8,\r | |
1990 | BaseAddress + Offset,\r | |
1991 | 1,\r | |
1992 | &Data\r | |
1993 | );\r | |
1994 | }\r | |
1995 | \r |