[NTOS:MM] Implement and use MiAcquirePfnLockAtDpcLevel/MiReleasePfnLockFromDpcLevel.
[reactos.git] / drivers / serial / serenum / detect.c
1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS Serial enumerator driver
4 * FILE: drivers/bus/serenum/detect.c
5 * PURPOSE: Detection of serial devices
6 *
7 * PROGRAMMERS: Jason Filby (jasonfilby@yahoo.com)
8 * Filip Navara (xnavara@volny.cz)
9 * Hervé Poussineau (hpoussin@reactos.org)
10 */
11
12 #include "serenum.h"
13
14 #include <debug.h>
15
16 static NTSTATUS
17 DeviceIoControl(
18 IN PDEVICE_OBJECT DeviceObject,
19 IN ULONG CtlCode,
20 IN PVOID InputBuffer OPTIONAL,
21 IN ULONG_PTR InputBufferSize,
22 IN OUT PVOID OutputBuffer OPTIONAL,
23 IN OUT PULONG_PTR OutputBufferSize)
24 {
25 KEVENT Event;
26 PIRP Irp;
27 IO_STATUS_BLOCK IoStatus;
28 NTSTATUS Status;
29
30 KeInitializeEvent (&Event, NotificationEvent, FALSE);
31
32 Irp = IoBuildDeviceIoControlRequest(CtlCode,
33 DeviceObject,
34 InputBuffer,
35 InputBufferSize,
36 OutputBuffer,
37 (OutputBufferSize) ? *OutputBufferSize : 0,
38 FALSE,
39 &Event,
40 &IoStatus);
41 if (Irp == NULL)
42 {
43 WARN_(SERENUM, "IoBuildDeviceIoControlRequest() failed\n");
44 return STATUS_INSUFFICIENT_RESOURCES;
45 }
46
47 Status = IoCallDriver(DeviceObject, Irp);
48
49 if (Status == STATUS_PENDING)
50 {
51 INFO_(SERENUM, "Operation pending\n");
52 KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
53 Status = IoStatus.Status;
54 }
55
56 if (OutputBufferSize)
57 {
58 *OutputBufferSize = IoStatus.Information;
59 }
60
61 return Status;
62 }
63
64 static NTSTATUS
65 ReadBytes(
66 IN PDEVICE_OBJECT LowerDevice,
67 OUT PUCHAR Buffer,
68 IN ULONG BufferSize,
69 OUT PULONG_PTR FilledBytes)
70 {
71 PIRP Irp;
72 IO_STATUS_BLOCK ioStatus;
73 KEVENT event;
74 LARGE_INTEGER zero;
75 NTSTATUS Status;
76
77 KeInitializeEvent(&event, NotificationEvent, FALSE);
78 zero.QuadPart = 0;
79 Irp = IoBuildSynchronousFsdRequest(
80 IRP_MJ_READ,
81 LowerDevice,
82 Buffer, BufferSize,
83 &zero,
84 &event,
85 &ioStatus);
86 if (!Irp)
87 return FALSE;
88
89 Status = IoCallDriver(LowerDevice, Irp);
90 if (Status == STATUS_PENDING)
91 {
92 KeWaitForSingleObject(&event, Suspended, KernelMode, FALSE, NULL);
93 Status = ioStatus.Status;
94 }
95 INFO_(SERENUM, "Bytes received: %lu/%lu\n",
96 ioStatus.Information, BufferSize);
97 *FilledBytes = ioStatus.Information;
98 return Status;
99 }
100
101 static NTSTATUS
102 ReportDetectedDevice(
103 IN PDEVICE_OBJECT DeviceObject,
104 IN PUNICODE_STRING DeviceDescription,
105 IN PUNICODE_STRING DeviceId,
106 IN PUNICODE_STRING InstanceId,
107 IN PUNICODE_STRING HardwareIds,
108 IN PUNICODE_STRING CompatibleIds)
109 {
110 PDEVICE_OBJECT Pdo = NULL;
111 PPDO_DEVICE_EXTENSION PdoDeviceExtension = NULL;
112 PFDO_DEVICE_EXTENSION FdoDeviceExtension;
113 NTSTATUS Status;
114
115 TRACE_(SERENUM, "ReportDetectedDevice() called with %wZ (%wZ) detected\n", DeviceId, DeviceDescription);
116
117 Status = IoCreateDevice(
118 DeviceObject->DriverObject,
119 sizeof(PDO_DEVICE_EXTENSION),
120 NULL,
121 FILE_DEVICE_CONTROLLER,
122 FILE_AUTOGENERATED_DEVICE_NAME,
123 FALSE,
124 &Pdo);
125 if (!NT_SUCCESS(Status)) goto ByeBye;
126
127 Pdo->Flags |= DO_BUS_ENUMERATED_DEVICE;
128 Pdo->Flags |= DO_POWER_PAGABLE;
129 PdoDeviceExtension = (PPDO_DEVICE_EXTENSION)Pdo->DeviceExtension;
130 FdoDeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
131 RtlZeroMemory(PdoDeviceExtension, sizeof(PDO_DEVICE_EXTENSION));
132 PdoDeviceExtension->Common.IsFDO = FALSE;
133 Status = DuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, DeviceDescription, &PdoDeviceExtension->DeviceDescription);
134 if (!NT_SUCCESS(Status)) goto ByeBye;
135 Status = DuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, DeviceId, &PdoDeviceExtension->DeviceId);
136 if (!NT_SUCCESS(Status)) goto ByeBye;
137 Status = DuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, InstanceId, &PdoDeviceExtension->InstanceId);
138 if (!NT_SUCCESS(Status)) goto ByeBye;
139 Status = DuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, HardwareIds, &PdoDeviceExtension->HardwareIds);
140 if (!NT_SUCCESS(Status)) goto ByeBye;
141 Status = DuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE, CompatibleIds, &PdoDeviceExtension->CompatibleIds);
142 if (!NT_SUCCESS(Status)) goto ByeBye;
143
144 /* Device attached to serial port (Pdo) may delegate work to
145 * serial port stack (Fdo = DeviceObject variable) */
146 Pdo->StackSize = DeviceObject->StackSize + 1;
147
148 FdoDeviceExtension->AttachedPdo = Pdo;
149 PdoDeviceExtension->AttachedFdo = DeviceObject;
150
151 Pdo->Flags |= DO_BUFFERED_IO;
152 Pdo->Flags &= ~DO_DEVICE_INITIALIZING;
153
154 return STATUS_SUCCESS;
155
156 ByeBye:
157 if (Pdo)
158 {
159 ASSERT(PdoDeviceExtension);
160 if (PdoDeviceExtension->DeviceDescription.Buffer)
161 RtlFreeUnicodeString(&PdoDeviceExtension->DeviceDescription);
162 if (PdoDeviceExtension->DeviceId.Buffer)
163 RtlFreeUnicodeString(&PdoDeviceExtension->DeviceId);
164 if (PdoDeviceExtension->InstanceId.Buffer)
165 RtlFreeUnicodeString(&PdoDeviceExtension->InstanceId);
166 if (PdoDeviceExtension->HardwareIds.Buffer)
167 RtlFreeUnicodeString(&PdoDeviceExtension->HardwareIds);
168 if (PdoDeviceExtension->CompatibleIds.Buffer)
169 RtlFreeUnicodeString(&PdoDeviceExtension->CompatibleIds);
170 IoDeleteDevice(Pdo);
171 }
172 return Status;
173 }
174
175 static BOOLEAN
176 IsValidPnpIdString(
177 IN PUCHAR Buffer,
178 IN ULONG BufferLength)
179 {
180 ANSI_STRING String;
181
182 /* FIXME: IsValidPnpIdString not implemented */
183 UNIMPLEMENTED;
184 String.Length = String.MaximumLength = BufferLength;
185 String.Buffer = (PCHAR)Buffer;
186 ERR_(SERENUM, "Buffer %Z\n", &String);
187 return TRUE;
188 }
189
190 static NTSTATUS
191 ReportDetectedPnpDevice(
192 IN PUCHAR Buffer,
193 IN ULONG BufferLength)
194 {
195 ANSI_STRING String;
196
197 /* FIXME: ReportDetectedPnpDevice not implemented */
198 UNIMPLEMENTED;
199 String.Length = String.MaximumLength = BufferLength;
200 String.Buffer = (PCHAR)Buffer;
201 ERR_(SERENUM, "Buffer %Z\n", &String);
202 /* Call ReportDetectedDevice */
203 return STATUS_SUCCESS;
204 }
205
206 #define BEGIN_ID '('
207 #define END_ID ')'
208
209 static NTSTATUS
210 Wait(
211 IN ULONG milliseconds)
212 {
213 KTIMER Timer;
214 LARGE_INTEGER DueTime;
215
216 DueTime.QuadPart = milliseconds * -10;
217 KeInitializeTimer(&Timer);
218 KeSetTimer(&Timer, DueTime, NULL);
219 return KeWaitForSingleObject(&Timer, Executive, KernelMode, FALSE, NULL);
220 }
221
222 NTSTATUS
223 SerenumDetectPnpDevice(
224 IN PDEVICE_OBJECT DeviceObject,
225 IN PDEVICE_OBJECT LowerDevice)
226 {
227 HANDLE Handle = NULL;
228 UCHAR Buffer[256];
229 ULONG BaudRate;
230 ULONG_PTR TotalBytesReceived = 0;
231 ULONG_PTR Size;
232 ULONG Msr, Purge;
233 ULONG i;
234 BOOLEAN BufferContainsBeginId = FALSE;
235 BOOLEAN BufferContainsEndId = FALSE;
236 SERIAL_LINE_CONTROL Lcr;
237 SERIAL_TIMEOUTS Timeouts;
238 SERIALPERF_STATS PerfStats;
239 NTSTATUS Status;
240
241 /* Open port */
242 Status = ObOpenObjectByPointer(
243 LowerDevice,
244 OBJ_KERNEL_HANDLE,
245 NULL,
246 0,
247 NULL,
248 KernelMode,
249 &Handle);
250 if (!NT_SUCCESS(Status)) goto ByeBye;
251
252 /* 1. COM port initialization, check for device enumerate */
253 TRACE_(SERENUM, "COM port initialization, check for device enumerate\n");
254 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_DTR,
255 NULL, 0, NULL, NULL);
256 if (!NT_SUCCESS(Status)) goto ByeBye;
257 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
258 NULL, 0, NULL, NULL);
259 if (!NT_SUCCESS(Status)) goto ByeBye;
260 Wait(200);
261 Size = sizeof(Msr);
262 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_GET_MODEMSTATUS,
263 NULL, 0, &Msr, &Size);
264 if (!NT_SUCCESS(Status)) goto ByeBye;
265 if ((Msr & SERIAL_DSR_STATE) == 0) goto DisconnectIdle;
266
267 /* 2. COM port setup, 1st phase */
268 TRACE_(SERENUM, "COM port setup, 1st phase\n");
269 BaudRate = 1200;
270 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_BAUD_RATE,
271 &BaudRate, sizeof(BaudRate), NULL, 0);
272 if (!NT_SUCCESS(Status)) goto ByeBye;
273 Lcr.WordLength = 7;
274 Lcr.Parity = NO_PARITY;
275 Lcr.StopBits = STOP_BIT_1;
276 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_LINE_CONTROL,
277 &Lcr, sizeof(Lcr), NULL, NULL);
278 if (!NT_SUCCESS(Status)) goto ByeBye;
279 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_DTR,
280 NULL, 0, NULL, NULL);
281 if (!NT_SUCCESS(Status)) goto ByeBye;
282 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
283 NULL, 0, NULL, NULL);
284 if (!NT_SUCCESS(Status)) goto ByeBye;
285 Wait(200);
286 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
287 NULL, 0, NULL, NULL);
288 if (!NT_SUCCESS(Status)) goto ByeBye;
289 Wait(200);
290
291 /* 3. Wait for response, 1st phase */
292 TRACE_(SERENUM, "Wait for response, 1st phase\n");
293 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_RTS,
294 NULL, 0, NULL, NULL);
295 if (!NT_SUCCESS(Status)) goto ByeBye;
296 Timeouts.ReadIntervalTimeout = 0;
297 Timeouts.ReadTotalTimeoutMultiplier = 0;
298 Timeouts.ReadTotalTimeoutConstant = 200;
299 Timeouts.WriteTotalTimeoutMultiplier = Timeouts.WriteTotalTimeoutConstant = 0;
300 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_TIMEOUTS,
301 &Timeouts, sizeof(Timeouts), NULL, NULL);
302 if (!NT_SUCCESS(Status)) goto ByeBye;
303 Status = ReadBytes(LowerDevice, Buffer, sizeof(Buffer), &Size);
304 if (!NT_SUCCESS(Status)) goto ByeBye;
305 if (Size != 0) goto CollectPnpComDeviceId;
306
307 /* 4. COM port setup, 2nd phase */
308 TRACE_(SERENUM, "COM port setup, 2nd phase\n");
309 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_DTR,
310 NULL, 0, NULL, NULL);
311 if (!NT_SUCCESS(Status)) goto ByeBye;
312 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
313 NULL, 0, NULL, NULL);
314 if (!NT_SUCCESS(Status)) goto ByeBye;
315 Purge = SERIAL_PURGE_RXABORT | SERIAL_PURGE_RXCLEAR;
316 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_PURGE,
317 &Purge, sizeof(ULONG), NULL, NULL);
318 if (!NT_SUCCESS(Status)) goto ByeBye;
319 Wait(200);
320
321 /* 5. Wait for response, 2nd phase */
322 TRACE_(SERENUM, "Wait for response, 2nd phase\n");
323 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
324 NULL, 0, NULL, NULL);
325 if (!NT_SUCCESS(Status)) goto ByeBye;
326 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_RTS,
327 NULL, 0, NULL, NULL);
328 if (!NT_SUCCESS(Status)) goto ByeBye;
329 Status = ReadBytes(LowerDevice, Buffer, 1, &TotalBytesReceived);
330 if (!NT_SUCCESS(Status)) goto ByeBye;
331 if (TotalBytesReceived != 0) goto CollectPnpComDeviceId;
332 Size = sizeof(Msr);
333 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_GET_MODEMSTATUS,
334 NULL, 0, &Msr, &Size);
335 if (!NT_SUCCESS(Status)) goto ByeBye;
336 if ((Msr & SERIAL_DSR_STATE) == 0) goto VerifyDisconnect; else goto ConnectIdle;
337
338 /* 6. Collect PnP COM device ID */
339 CollectPnpComDeviceId:
340 TRACE_(SERENUM, "Collect PnP COM device ID\n");
341 Timeouts.ReadIntervalTimeout = 200;
342 Timeouts.ReadTotalTimeoutMultiplier = 0;
343 Timeouts.ReadTotalTimeoutConstant = 2200;
344 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_TIMEOUTS,
345 &Timeouts, sizeof(Timeouts), NULL, NULL);
346 if (!NT_SUCCESS(Status)) goto ByeBye;
347 Status = ReadBytes(LowerDevice, &Buffer[TotalBytesReceived], sizeof(Buffer) - TotalBytesReceived, &Size);
348 if (!NT_SUCCESS(Status)) goto ByeBye;
349 TotalBytesReceived += Size;
350 Size = sizeof(PerfStats);
351 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_GET_STATS,
352 NULL, 0, &PerfStats, &Size);
353 if (!NT_SUCCESS(Status)) goto ByeBye;
354 if (PerfStats.FrameErrorCount + PerfStats.ParityErrorCount != 0) goto ConnectIdle;
355 for (i = 0; i < TotalBytesReceived; i++)
356 {
357 if (Buffer[i] == BEGIN_ID) BufferContainsBeginId = TRUE;
358 if (Buffer[i] == END_ID) BufferContainsEndId = TRUE;
359 }
360 if (TotalBytesReceived == 1 || BufferContainsEndId)
361 {
362 if (IsValidPnpIdString(Buffer, TotalBytesReceived))
363 {
364 Status = ReportDetectedPnpDevice(Buffer, TotalBytesReceived);
365 goto ByeBye;
366 }
367 goto ConnectIdle;
368 }
369 if (!BufferContainsBeginId) goto ConnectIdle;
370 if (!BufferContainsEndId) goto ConnectIdle;
371 Size = sizeof(Msr);
372 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_GET_MODEMSTATUS,
373 NULL, 0, &Msr, &Size);
374 if (!NT_SUCCESS(Status)) goto ByeBye;
375 if ((Msr & SERIAL_DSR_STATE) == 0) goto VerifyDisconnect;
376
377 /* 7. Verify disconnect */
378 VerifyDisconnect:
379 TRACE_(SERENUM, "Verify disconnect\n");
380 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
381 NULL, 0, NULL, NULL);
382 if (!NT_SUCCESS(Status)) goto ByeBye;
383 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
384 NULL, 0, NULL, NULL);
385 if (!NT_SUCCESS(Status)) goto ByeBye;
386 Wait(5000);
387 goto DisconnectIdle;
388
389 /* 8. Connect idle */
390 ConnectIdle:
391 TRACE_(SERENUM, "Connect idle\n");
392 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
393 NULL, 0, NULL, NULL);
394 if (!NT_SUCCESS(Status)) goto ByeBye;
395 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
396 NULL, 0, NULL, NULL);
397 if (!NT_SUCCESS(Status)) goto ByeBye;
398 BaudRate = 300;
399 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_BAUD_RATE,
400 &BaudRate, sizeof(BaudRate), NULL, NULL);
401 if (!NT_SUCCESS(Status)) goto ByeBye;
402 Lcr.WordLength = 7;
403 Lcr.Parity = NO_PARITY;
404 Lcr.StopBits = STOP_BIT_1;
405 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_LINE_CONTROL,
406 &Lcr, sizeof(Lcr), NULL, NULL);
407 if (!NT_SUCCESS(Status)) goto ByeBye;
408 if (TotalBytesReceived == 0)
409 Status = STATUS_DEVICE_NOT_CONNECTED;
410 else
411 Status = STATUS_SUCCESS;
412 goto ByeBye;
413
414 /* 9. Disconnect idle */
415 DisconnectIdle:
416 TRACE_(SERENUM, "Disconnect idle\n");
417 /* FIXME: report to OS device removal, if it was present */
418 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
419 NULL, 0, NULL, NULL);
420 if (!NT_SUCCESS(Status)) goto ByeBye;
421 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_CLR_RTS,
422 NULL, 0, NULL, NULL);
423 if (!NT_SUCCESS(Status)) goto ByeBye;
424 BaudRate = 300;
425 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_BAUD_RATE,
426 &BaudRate, sizeof(BaudRate), NULL, NULL);
427 if (!NT_SUCCESS(Status)) goto ByeBye;
428 Lcr.WordLength = 7;
429 Lcr.Parity = NO_PARITY;
430 Lcr.StopBits = STOP_BIT_1;
431 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_LINE_CONTROL,
432 &Lcr, sizeof(Lcr), NULL, NULL);
433 if (!NT_SUCCESS(Status)) goto ByeBye;
434 Status = STATUS_DEVICE_NOT_CONNECTED;
435
436 ByeBye:
437 /* Close port */
438 if (Handle)
439 ZwClose(Handle);
440 return Status;
441 }
442
443 NTSTATUS
444 SerenumDetectLegacyDevice(
445 IN PDEVICE_OBJECT DeviceObject,
446 IN PDEVICE_OBJECT LowerDevice)
447 {
448 HANDLE Handle = NULL;
449 ULONG Fcr, Mcr;
450 ULONG BaudRate;
451 ULONG Command;
452 SERIAL_TIMEOUTS Timeouts;
453 SERIAL_LINE_CONTROL LCR;
454 ULONG i, Count = 0;
455 UCHAR Buffer[16];
456 UNICODE_STRING DeviceDescription;
457 UNICODE_STRING DeviceId;
458 UNICODE_STRING InstanceId;
459 UNICODE_STRING HardwareIds;
460 UNICODE_STRING CompatibleIds;
461 NTSTATUS Status;
462
463 TRACE_(SERENUM, "SerenumDetectLegacyDevice(DeviceObject %p, LowerDevice %p)\n",
464 DeviceObject,
465 LowerDevice);
466
467 RtlZeroMemory(Buffer, sizeof(Buffer));
468
469 /* Open port */
470 Status = ObOpenObjectByPointer(
471 LowerDevice,
472 OBJ_KERNEL_HANDLE,
473 NULL,
474 0,
475 NULL,
476 KernelMode,
477 &Handle);
478 if (!NT_SUCCESS(Status)) return Status;
479
480 /* Reset UART */
481 TRACE_(SERENUM, "Reset UART\n");
482 Mcr = 0; /* MCR: DTR/RTS/OUT2 off */
483 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_MODEM_CONTROL,
484 &Mcr, sizeof(Mcr), NULL, NULL);
485 if (!NT_SUCCESS(Status)) goto ByeBye;
486
487 /* Set communications parameters */
488 TRACE_(SERENUM, "Set communications parameters\n");
489 /* DLAB off */
490 Fcr = 0;
491 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_FIFO_CONTROL,
492 &Fcr, sizeof(Fcr), NULL, NULL);
493 if (!NT_SUCCESS(Status)) goto ByeBye;
494 /* Set serial port speed */
495 BaudRate = 1200;
496 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_BAUD_RATE,
497 &BaudRate, sizeof(BaudRate), NULL, NULL);
498 if (!NT_SUCCESS(Status)) goto ByeBye;
499 /* Set LCR */
500 LCR.WordLength = 7;
501 LCR.Parity = NO_PARITY;
502 LCR.StopBits = STOP_BITS_2;
503 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_LINE_CONTROL,
504 &LCR, sizeof(LCR), NULL, NULL);
505 if (!NT_SUCCESS(Status)) goto ByeBye;
506
507 /* Flush receive buffer */
508 TRACE_(SERENUM, "Flush receive buffer\n");
509 Command = SERIAL_PURGE_RXCLEAR;
510 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_MODEM_CONTROL,
511 &Command, sizeof(Command), NULL, NULL);
512 if (!NT_SUCCESS(Status)) goto ByeBye;
513 /* Wait 100 ms */
514 Wait(100);
515
516 /* Enable DTR/RTS */
517 TRACE_(SERENUM, "Enable DTR/RTS\n");
518 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_DTR,
519 NULL, 0, NULL, NULL);
520 if (!NT_SUCCESS(Status)) goto ByeBye;
521 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_RTS,
522 NULL, 0, NULL, NULL);
523 if (!NT_SUCCESS(Status)) goto ByeBye;
524
525 /* Set timeout to 500 microseconds */
526 TRACE_(SERENUM, "Set timeout to 500 microseconds\n");
527 Timeouts.ReadIntervalTimeout = 100;
528 Timeouts.ReadTotalTimeoutMultiplier = 0;
529 Timeouts.ReadTotalTimeoutConstant = 500;
530 Timeouts.WriteTotalTimeoutMultiplier = Timeouts.WriteTotalTimeoutConstant = 0;
531 Status = DeviceIoControl(LowerDevice, IOCTL_SERIAL_SET_TIMEOUTS,
532 &Timeouts, sizeof(Timeouts), NULL, NULL);
533 if (!NT_SUCCESS(Status)) goto ByeBye;
534
535 /* Fill the read buffer */
536 TRACE_(SERENUM, "Fill the read buffer\n");
537 Status = ReadBytes(LowerDevice, Buffer, sizeof(Buffer)/sizeof(Buffer[0]), (PVOID)&Count);
538 if (!NT_SUCCESS(Status)) goto ByeBye;
539
540 RtlInitUnicodeString(&DeviceId, L"Serenum\\Mouse");
541 RtlInitUnicodeString(&InstanceId, L"0000"); /* FIXME */
542 for (i = 0; i < Count; i++)
543 {
544 if (Buffer[i] == 'B')
545 {
546 /* Sign for Microsoft Ballpoint */
547 /* Hardware id: *PNP0F09
548 * Compatible id: *PNP0F0F, SERIAL_MOUSE
549 */
550 RtlInitUnicodeString(&DeviceDescription, L"Microsoft Ballpoint device");
551 SerenumInitMultiSzString(&HardwareIds, "*PNP0F09", NULL);
552 SerenumInitMultiSzString(&CompatibleIds, "*PNP0F0F", "SERIAL_MOUSE", NULL);
553 Status = ReportDetectedDevice(DeviceObject,
554 &DeviceDescription, &DeviceId, &InstanceId, &HardwareIds, &CompatibleIds);
555 RtlFreeUnicodeString(&HardwareIds);
556 RtlFreeUnicodeString(&CompatibleIds);
557 goto ByeBye;
558 }
559 else if (Buffer[i] == 'M')
560 {
561 /* Sign for Microsoft Mouse protocol followed by button specifier */
562 if (i == sizeof(Buffer) - 1)
563 {
564 /* Overflow Error */
565 Status = STATUS_DEVICE_NOT_CONNECTED;
566 goto ByeBye;
567 }
568 switch (Buffer[i + 1])
569 {
570 case '3':
571 /* Hardware id: *PNP0F08
572 * Compatible id: SERIAL_MOUSE
573 */
574 RtlInitUnicodeString(&DeviceDescription, L"Microsoft Mouse with 3-buttons");
575 SerenumInitMultiSzString(&HardwareIds, "*PNP0F08", NULL);
576 SerenumInitMultiSzString(&CompatibleIds, "SERIAL_MOUSE", NULL);
577 break;
578 default:
579 /* Hardware id: *PNP0F01
580 * Compatible id: SERIAL_MOUSE
581 */
582 RtlInitUnicodeString(&DeviceDescription, L"Microsoft Mouse with 2-buttons or Microsoft Wheel Mouse");
583 SerenumInitMultiSzString(&HardwareIds, "*PNP0F01", NULL);
584 SerenumInitMultiSzString(&CompatibleIds, "SERIAL_MOUSE", NULL);
585 break;
586 }
587 Status = ReportDetectedDevice(DeviceObject,
588 &DeviceDescription, &DeviceId, &InstanceId, &HardwareIds, &CompatibleIds);
589 RtlFreeUnicodeString(&HardwareIds);
590 RtlFreeUnicodeString(&CompatibleIds);
591 goto ByeBye;
592 }
593 }
594
595 Status = STATUS_DEVICE_NOT_CONNECTED;
596
597 ByeBye:
598 /* Close port */
599 if (Handle)
600 ZwClose(Handle);
601 return Status;
602 }