VOID
sndStopDMA(
IN PGLOBAL_DEVICE_INFO pGDI
)
/*++
Routine Description:
Stop the DMA at once by disabling the hardware
Free the adapter channel.
(Opposite of sndStartDMA).
Arguments:
pGDI - pointer to global device info
Return Value:
None
--*/
{
//
// Pass HALT DMA to the MIPSSND
//
if (pGDI->DMABusy) {
KeSynchronizeExecution(pGDI->pInterrupt, StopDMA, pGDI);
//
// Flush our buffers
//
sndFlush(pGDI, 0);
sndFlush(pGDI, 1);
//
// Stop the DMA controller
//
if (pGDI->Usage == SoundInterruptUsageWaveIn) {
IoFreeAdapterChannel(pGDI->pAdapterObject[2]);
IoFreeAdapterChannel(pGDI->pAdapterObject[3]);
} else {
IoFreeAdapterChannel(pGDI->pAdapterObject[0]);
IoFreeAdapterChannel(pGDI->pAdapterObject[1]);
}
}
dprintf4(" dma_stopped");
//
// Note our new state
//
pGDI->DMABusy = FALSE;
}
///////////////////////////////////////////////////////////////////////////////
//
// OsrAdapterControlWrite
//
// This is routine is called by the I/O Manager when the Adapter resources
// (such as map registers) requested by the OsrStartWriteIrp function are
// available for our use.
//
// INPUTS:
//
// DeviceObject - Address of the DEVICE_OBJECT for our device.
//
// MapRegisterBase - Base address of the Map registers that have been
// reserved by the I/O Manager and HAL for our use.
//
// Context - address of the Write Irp for the operation to be started on the
// device.
//
// OUTPUTS:
//
// None.
//
// RETURNS:
//
// DeallocateObjectKeepRegisters - indicates that the map registers that
// were allocated to us should not be deallocated at this time.
// We will deallocate them with the Read operation completes.
//
// IRQL:
//
// This routine is called at IRQL_DISPATCH_LEVEL.
//
// NOTES:
//
///////////////////////////////////////////////////////////////////////////////
IO_ALLOCATION_ACTION
OsrAdapterControlWrite(IN PDEVICE_OBJECT DeviceObject, IN PIRP NotUsed,
IN PVOID MapRegisterBase, IN PVOID Context)
{
PIRP irp = (PIRP) Context;
PIO_STACK_LOCATION ioStack;
POSR_DEVICE_EXT devExt;
PUCHAR baseVa;
#if DBG
DbgPrint("AdapterControlWrite: Irp = 0x%0x\n", irp);
#endif
devExt = DeviceObject->DeviceExtension;
ioStack = IoGetCurrentIrpStackLocation(irp);
devExt->WriteLength = ioStack->Parameters.Write.Length - devExt->WriteSoFar;
#if DBG
DbgPrint("AdapterControlWrite: Length remaining = %d. \n", devExt->WriteLength);
#endif
//
// Get set-up for the transfer
//
devExt->WriteMapRegBase = MapRegisterBase;
baseVa = MmGetMdlVirtualAddress(irp->MdlAddress);
devExt->WriteStartingOffset = devExt->WriteSoFar;
//
// Get the base address and length of the segment to write.
//
devExt->WritePaToDevice = IoMapTransfer(devExt->WriteAdapter,
irp->MdlAddress,
MapRegisterBase,
baseVa+(devExt->WriteSoFar),
&devExt->WriteLength,
TRUE); // WriteToDevice
//
// Update the length transfered so far
//
devExt->WriteSoFar += devExt->WriteLength;
//
// Put the request on the device
//
(VOID)KeSynchronizeExecution(devExt->InterruptObject,
OsrStartWriteOnDevice,
DeviceObject);
return(DeallocateObjectKeepRegisters);
}
VOID
SerialInvokePerhapsLowerRTS(
IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemContext1,
IN PVOID SystemContext2
)
/*++
Routine Description:
This dpc routine exists solely to call the code that
tests if the rts line should be lowered when TRANSMIT
TOGGLE flow control is being used.
Arguments:
Dpc - Not Used.
DeferredContext - Really points to the device extension.
SystemContext1 - Not Used.
SystemContext2 - Not Used.
Return Value:
None.
--*/
{
PSERIAL_DEVICE_EXTENSION Extension = DeferredContext;
UNREFERENCED_PARAMETER(Dpc);
UNREFERENCED_PARAMETER(SystemContext1);
UNREFERENCED_PARAMETER(SystemContext2);
KeSynchronizeExecution(
Extension->Interrupt,
SerialPerhapsLowerRTS,
Extension
);
}
NTSTATUS
SerialIoControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine provides the initial processing for all of the
Ioctrls for the serial device.
Arguments:
DeviceObject - Pointer to the device object for this device
Irp - Pointer to the IRP for the current request
Return Value:
The function value is the final status of the call
--*/
{
//
// The status that gets returned to the caller and
// set in the Irp.
//
NTSTATUS Status;
//
// The current stack location. This contains all of the
// information we need to process this particular request.
//
PIO_STACK_LOCATION IrpSp;
//
// Just what it says. This is the serial specific device
// extension of the device object create for the serial driver.
//
PSERIAL_DEVICE_EXTENSION Extension = DeviceObject->DeviceExtension;
//
// A temporary to hold the old IRQL so that it can be
// restored once we complete/validate this request.
//
KIRQL OldIrql;
SerialDump(
SERIRPPATH,
("SERIAL: Dispatch entry for: %x\n",Irp)
);
if (SerialCompleteIfError(
DeviceObject,
Irp
) != STATUS_SUCCESS) {
return STATUS_CANCELLED;
}
IrpSp = IoGetCurrentIrpStackLocation(Irp);
Irp->IoStatus.Information = 0L;
Status = STATUS_SUCCESS;
switch (IrpSp->Parameters.DeviceIoControl.IoControlCode) {
case IOCTL_SERIAL_SET_BAUD_RATE : {
ULONG BaudRate;
//
// Will hold the value of the appropriate divisor for
// the requested baud rate. If the baudrate is invalid
// (because the device won't support that baud rate) then
// this value is undefined.
//
// Note: in one sense the concept of a valid baud rate
// is cloudy. We could allow the user to request any
// baud rate. We could then calculate the divisor needed
// for that baud rate. As long as the divisor wasn't less
// than one we would be "ok". (The percentage difference
// between the "true" divisor and the "rounded" value given
// to the hardware might make it unusable, but... ) It would
// really be up to the user to "Know" whether the baud rate
// is suitable. So much for theory, *We* only support a given
// set of baud rates.
//
SHORT AppropriateDivisor;
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_BAUD_RATE)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
} else {
BaudRate = ((PSERIAL_BAUD_RATE)(Irp->AssociatedIrp.SystemBuffer))->BaudRate;
}
//
// Get the baud rate from the irp. We pass it
// to a routine which will set the correct divisor.
//
Status = SerialGetDivisorFromBaud(
Extension->ClockRate,
BaudRate,
&AppropriateDivisor
);
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
if (NT_SUCCESS(Status)) {
SERIAL_IOCTL_SYNC S;
Extension->CurrentBaud = BaudRate;
S.Extension = Extension;
S.Data = (PVOID)AppropriateDivisor;
KeSynchronizeExecution(
Extension->Interrupt,
SerialSetBaud,
&S
);
}
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_BAUD_RATE: {
PSERIAL_BAUD_RATE Br = (PSERIAL_BAUD_RATE)Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_BAUD_RATE)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
Br->BaudRate = Extension->CurrentBaud;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
Irp->IoStatus.Information = sizeof(SERIAL_BAUD_RATE);
break;
}
case IOCTL_SERIAL_SET_LINE_CONTROL: {
//
// Points to the line control record in the Irp.
//
PSERIAL_LINE_CONTROL Lc =
((PSERIAL_LINE_CONTROL)(Irp->AssociatedIrp.SystemBuffer));
UCHAR LData;
UCHAR LStop;
UCHAR LParity;
UCHAR Mask = 0xff;
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_LINE_CONTROL)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
switch (Lc->WordLength) {
case 5: {
LData = SERIAL_5_DATA;
Mask = 0x1f;
break;
}
case 6: {
LData = SERIAL_6_DATA;
Mask = 0x3f;
break;
}
case 7: {
LData = SERIAL_7_DATA;
Mask = 0x7f;
break;
}
case 8: {
LData = SERIAL_8_DATA;
break;
}
default: {
Status = STATUS_INVALID_PARAMETER;
goto DoneWithIoctl;
}
}
switch (Lc->Parity) {
case NO_PARITY: {
LParity = SERIAL_NONE_PARITY;
break;
}
case EVEN_PARITY: {
LParity = SERIAL_EVEN_PARITY;
break;
}
case ODD_PARITY: {
LParity = SERIAL_ODD_PARITY;
break;
}
case SPACE_PARITY: {
LParity = SERIAL_SPACE_PARITY;
break;
}
case MARK_PARITY: {
LParity = SERIAL_MARK_PARITY;
break;
}
default: {
Status = STATUS_INVALID_PARAMETER;
goto DoneWithIoctl;
break;
}
}
switch (Lc->StopBits) {
case STOP_BIT_1: {
LStop = SERIAL_1_STOP;
break;
}
case STOP_BITS_1_5: {
if (LData != SERIAL_5_DATA) {
Status = STATUS_INVALID_PARAMETER;
goto DoneWithIoctl;
}
LStop = SERIAL_1_5_STOP;
break;
}
case STOP_BITS_2: {
if (LData == SERIAL_5_DATA) {
Status = STATUS_INVALID_PARAMETER;
goto DoneWithIoctl;
}
LStop = SERIAL_2_STOP;
break;
}
default: {
Status = STATUS_INVALID_PARAMETER;
goto DoneWithIoctl;
}
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
Extension->LineControl =
(UCHAR)((Extension->LineControl & SERIAL_LCR_BREAK) |
(LData | LParity | LStop));
Extension->ValidDataMask = Mask;
KeSynchronizeExecution(
Extension->Interrupt,
SerialSetLineControl,
Extension
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_LINE_CONTROL: {
PSERIAL_LINE_CONTROL Lc = (PSERIAL_LINE_CONTROL)Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_LINE_CONTROL)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
if ((Extension->LineControl & SERIAL_DATA_MASK) == SERIAL_5_DATA) {
Lc->WordLength = 5;
} else if ((Extension->LineControl & SERIAL_DATA_MASK)
== SERIAL_6_DATA) {
Lc->WordLength = 6;
} else if ((Extension->LineControl & SERIAL_DATA_MASK)
== SERIAL_7_DATA) {
Lc->WordLength = 7;
} else if ((Extension->LineControl & SERIAL_DATA_MASK)
== SERIAL_8_DATA) {
Lc->WordLength = 8;
}
if ((Extension->LineControl & SERIAL_PARITY_MASK)
== SERIAL_NONE_PARITY) {
Lc->Parity = NO_PARITY;
} else if ((Extension->LineControl & SERIAL_PARITY_MASK)
== SERIAL_ODD_PARITY) {
Lc->Parity = ODD_PARITY;
} else if ((Extension->LineControl & SERIAL_PARITY_MASK)
== SERIAL_EVEN_PARITY) {
Lc->Parity = EVEN_PARITY;
} else if ((Extension->LineControl & SERIAL_PARITY_MASK)
== SERIAL_MARK_PARITY) {
Lc->Parity = MARK_PARITY;
} else if ((Extension->LineControl & SERIAL_PARITY_MASK)
== SERIAL_SPACE_PARITY) {
Lc->Parity = SPACE_PARITY;
}
if (Extension->LineControl & SERIAL_2_STOP) {
if (Lc->WordLength == 5) {
Lc->StopBits = STOP_BITS_1_5;
} else {
Lc->StopBits = STOP_BITS_2;
}
} else {
Lc->StopBits = STOP_BIT_1;
}
Irp->IoStatus.Information = sizeof(SERIAL_LINE_CONTROL);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_SET_TIMEOUTS: {
PSERIAL_TIMEOUTS NewTimeouts =
((PSERIAL_TIMEOUTS)(Irp->AssociatedIrp.SystemBuffer));
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_TIMEOUTS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
if ((NewTimeouts->ReadIntervalTimeout == MAXULONG) &&
(NewTimeouts->ReadTotalTimeoutMultiplier == MAXULONG) &&
(NewTimeouts->ReadTotalTimeoutConstant == MAXULONG)) {
Status = STATUS_INVALID_PARAMETER;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
Extension->Timeouts.ReadIntervalTimeout =
NewTimeouts->ReadIntervalTimeout;
Extension->Timeouts.ReadTotalTimeoutMultiplier =
NewTimeouts->ReadTotalTimeoutMultiplier;
Extension->Timeouts.ReadTotalTimeoutConstant =
NewTimeouts->ReadTotalTimeoutConstant;
Extension->Timeouts.WriteTotalTimeoutMultiplier =
NewTimeouts->WriteTotalTimeoutMultiplier;
Extension->Timeouts.WriteTotalTimeoutConstant =
NewTimeouts->WriteTotalTimeoutConstant;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_TIMEOUTS: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_TIMEOUTS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
*((PSERIAL_TIMEOUTS)Irp->AssociatedIrp.SystemBuffer) = Extension->Timeouts;
Irp->IoStatus.Information = sizeof(SERIAL_TIMEOUTS);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_SET_CHARS: {
SERIAL_IOCTL_SYNC S;
PSERIAL_CHARS NewChars =
((PSERIAL_CHARS)(Irp->AssociatedIrp.SystemBuffer));
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_CHARS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// The only thing that can be wrong with the chars
// is that the xon and xoff characters are the
// same.
//
#if 0
if (NewChars->XonChar == NewChars->XoffChar) {
Status = STATUS_INVALID_PARAMETER;
break;
}
#endif
//
// We acquire the control lock so that only
// one request can GET or SET the characters
// at a time. The sets could be synchronized
// by the interrupt spinlock, but that wouldn't
// prevent multiple gets at the same time.
//
S.Extension = Extension;
S.Data = NewChars;
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
//
// Under the protection of the lock, make sure that
// the xon and xoff characters aren't the same as
// the escape character.
//
if (Extension->EscapeChar) {
if ((Extension->EscapeChar == NewChars->XonChar) ||
(Extension->EscapeChar == NewChars->XoffChar)) {
Status = STATUS_INVALID_PARAMETER;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
}
KeSynchronizeExecution(
Extension->Interrupt,
SerialSetChars,
&S
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_CHARS: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_CHARS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
*((PSERIAL_CHARS)Irp->AssociatedIrp.SystemBuffer) = Extension->SpecialChars;
Irp->IoStatus.Information = sizeof(SERIAL_CHARS);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_SET_DTR:
case IOCTL_SERIAL_CLR_DTR: {
//
// We acquire the lock so that we can check whether
// automatic dtr flow control is enabled. If it is
// then we return an error since the app is not allowed
// to touch this if it is automatic.
//
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
if ((Extension->HandFlow.ControlHandShake & SERIAL_DTR_MASK)
== SERIAL_DTR_HANDSHAKE) {
Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
} else {
KeSynchronizeExecution(
Extension->Interrupt,
((IrpSp->Parameters.DeviceIoControl.IoControlCode ==
IOCTL_SERIAL_SET_DTR)?
(SerialSetDTR):(SerialClrDTR)),
Extension
);
}
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_RESET_DEVICE: {
break;
}
case IOCTL_SERIAL_SET_RTS:
case IOCTL_SERIAL_CLR_RTS: {
//
// We acquire the lock so that we can check whether
// automatic rts flow control or transmit toggleing
// is enabled. If it is then we return an error since
// the app is not allowed to touch this if it is automatic
// or toggling.
//
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
if (((Extension->HandFlow.FlowReplace & SERIAL_RTS_MASK)
== SERIAL_RTS_HANDSHAKE) ||
((Extension->HandFlow.FlowReplace & SERIAL_RTS_MASK)
== SERIAL_TRANSMIT_TOGGLE)) {
Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
} else {
KeSynchronizeExecution(
Extension->Interrupt,
((IrpSp->Parameters.DeviceIoControl.IoControlCode ==
IOCTL_SERIAL_SET_RTS)?
(SerialSetRTS):(SerialClrRTS)),
Extension
);
}
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_SET_XOFF: {
KeSynchronizeExecution(
Extension->Interrupt,
SerialPretendXoff,
Extension
);
break;
}
case IOCTL_SERIAL_SET_XON: {
KeSynchronizeExecution(
Extension->Interrupt,
SerialPretendXon,
Extension
);
break;
}
case IOCTL_SERIAL_SET_BREAK_ON: {
KeSynchronizeExecution(
Extension->Interrupt,
SerialTurnOnBreak,
Extension
);
break;
}
case IOCTL_SERIAL_SET_BREAK_OFF: {
KeSynchronizeExecution(
Extension->Interrupt,
SerialTurnOffBreak,
Extension
);
break;
}
case IOCTL_SERIAL_SET_QUEUE_SIZE: {
//
// Type ahead buffer is fixed, so we just validate
// the the users request is not bigger that our
// own internal buffer size.
//
PSERIAL_QUEUE_SIZE Rs =
((PSERIAL_QUEUE_SIZE)(Irp->AssociatedIrp.SystemBuffer));
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_QUEUE_SIZE)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// We have to allocate the memory for the new
// buffer while we're still in the context of the
// caller. We don't even try to protect this
// with a lock because the value could be stale
// as soon as we release the lock - The only time
// we will know for sure is when we actually try
// to do the resize.
//
if (Rs->InSize <= Extension->BufferSize) {
Status = STATUS_SUCCESS;
break;
}
try {
IrpSp->Parameters.DeviceIoControl.Type3InputBuffer =
ExAllocatePoolWithQuota(
NonPagedPool,
Rs->InSize
);
} except (EXCEPTION_EXECUTE_HANDLER) {
IrpSp->Parameters.DeviceIoControl.Type3InputBuffer = NULL;
Status = GetExceptionCode();
}
if (!IrpSp->Parameters.DeviceIoControl.Type3InputBuffer) {
break;
}
//
// Well the data passed was big enough. Do the request.
//
// There are two reason we place it in the read queue:
//
// 1) We want to serialize these resize requests so that
// they don't contend with each other.
//
// 2) We want to serialize these requests with reads since
// we don't want reads and resizes contending over the
// read buffer.
//
return SerialStartOrQueue(
Extension,
Irp,
&Extension->ReadQueue,
&Extension->CurrentReadIrp,
SerialStartRead
);
break;
}
case IOCTL_SERIAL_GET_WAIT_MASK: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(ULONG)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// Simple scalar read. No reason to acquire a lock.
//
Irp->IoStatus.Information = sizeof(ULONG);
*((ULONG *)Irp->AssociatedIrp.SystemBuffer) = Extension->IsrWaitMask;
break;
}
case IOCTL_SERIAL_SET_WAIT_MASK: {
ULONG NewMask;
SerialDump(
SERDIAG3 | SERIRPPATH,
("SERIAL: In Ioctl processing for set mask\n")
);
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(ULONG)) {
SerialDump(
SERDIAG3,
("SERIAL: Invalid size fo the buffer %d\n",
IrpSp->Parameters.DeviceIoControl.InputBufferLength)
);
Status = STATUS_BUFFER_TOO_SMALL;
break;
} else {
NewMask = *((ULONG *)Irp->AssociatedIrp.SystemBuffer);
}
//
// Make sure that the mask only contains valid
// waitable events.
//
if (NewMask & ~(SERIAL_EV_RXCHAR |
SERIAL_EV_RXFLAG |
SERIAL_EV_TXEMPTY |
SERIAL_EV_CTS |
SERIAL_EV_DSR |
SERIAL_EV_RLSD |
SERIAL_EV_BREAK |
SERIAL_EV_ERR |
SERIAL_EV_RING |
SERIAL_EV_PERR |
SERIAL_EV_RX80FULL |
SERIAL_EV_EVENT1 |
SERIAL_EV_EVENT2)) {
SerialDump(
SERDIAG3,
("SERIAL: Unknown mask %x\n",NewMask)
);
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// Either start this irp or put it on the
// queue.
//
SerialDump(
SERDIAG3 | SERIRPPATH,
("SERIAL: Starting or queuing set mask irp %x\n",Irp)
);
return SerialStartOrQueue(
Extension,
Irp,
&Extension->MaskQueue,
&Extension->CurrentMaskIrp,
SerialStartMask
);
}
case IOCTL_SERIAL_WAIT_ON_MASK: {
SerialDump(
SERDIAG3 | SERIRPPATH,
("SERIAL: In Ioctl processing for wait mask\n")
);
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(ULONG)) {
SerialDump(
SERDIAG3,
("SERIAL: Invalid size fo the buffer %d\n",
IrpSp->Parameters.DeviceIoControl.InputBufferLength)
);
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// Either start this irp or put it on the
// queue.
//
SerialDump(
SERDIAG3 | SERIRPPATH,
("SERIAL: Starting or queuing wait mask irp %x\n",Irp)
);
return SerialStartOrQueue(
Extension,
Irp,
&Extension->MaskQueue,
&Extension->CurrentMaskIrp,
SerialStartMask
);
}
case IOCTL_SERIAL_IMMEDIATE_CHAR: {
KIRQL OldIrql;
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(UCHAR)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
IoAcquireCancelSpinLock(&OldIrql);
if (Extension->CurrentImmediateIrp) {
Status = STATUS_INVALID_PARAMETER;
IoReleaseCancelSpinLock(OldIrql);
} else {
//
// We can queue the char. We need to set
// a cancel routine because flow control could
// keep the char from transmitting. Make sure
// that the irp hasn't already been canceled.
//
if (Irp->Cancel) {
IoReleaseCancelSpinLock(OldIrql);
Status = STATUS_CANCELLED;
} else {
Extension->CurrentImmediateIrp = Irp;
Extension->TotalCharsQueued++;
IoReleaseCancelSpinLock(OldIrql);
SerialStartImmediate(Extension);
return STATUS_PENDING;
}
}
break;
}
case IOCTL_SERIAL_PURGE: {
ULONG Mask;
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(ULONG)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// Check to make sure that the mask only has
// 0 or the other appropriate values.
//
Mask = *((ULONG *)(Irp->AssociatedIrp.SystemBuffer));
if ((!Mask) || (Mask & (~(SERIAL_PURGE_TXABORT |
SERIAL_PURGE_RXABORT |
SERIAL_PURGE_TXCLEAR |
SERIAL_PURGE_RXCLEAR
)
)
)) {
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// Either start this irp or put it on the
// queue.
//
return SerialStartOrQueue(
Extension,
Irp,
&Extension->PurgeQueue,
&Extension->CurrentPurgeIrp,
SerialStartPurge
);
}
case IOCTL_SERIAL_GET_HANDFLOW: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_HANDFLOW)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(SERIAL_HANDFLOW);
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
*((PSERIAL_HANDFLOW)Irp->AssociatedIrp.SystemBuffer) =
Extension->HandFlow;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_SET_HANDFLOW: {
SERIAL_IOCTL_SYNC S;
PSERIAL_HANDFLOW HandFlow = Irp->AssociatedIrp.SystemBuffer;
//
// Make sure that the hand shake and control is the
// right size.
//
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_HANDFLOW)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// Make sure that there are no invalid bits set in
// the control and handshake.
//
if (HandFlow->ControlHandShake & SERIAL_CONTROL_INVALID) {
Status = STATUS_INVALID_PARAMETER;
break;
}
if (HandFlow->FlowReplace & SERIAL_FLOW_INVALID) {
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// Make sure that the app hasn't set an invlid DTR mode.
//
if ((HandFlow->ControlHandShake & SERIAL_DTR_MASK) ==
SERIAL_DTR_MASK) {
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// Make sure that haven't set totally invalid xon/xoff
// limits.
//
if ((HandFlow->XonLimit < 0) ||
((ULONG)HandFlow->XonLimit > Extension->BufferSize)) {
Status = STATUS_INVALID_PARAMETER;
break;
}
if ((HandFlow->XoffLimit < 0) ||
((ULONG)HandFlow->XoffLimit > Extension->BufferSize)) {
Status = STATUS_INVALID_PARAMETER;
break;
}
S.Extension = Extension;
S.Data = HandFlow;
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
//
// Under the protection of the lock, make sure that
// we aren't turning on error replacement when we
// are doing line status/modem status insertion.
//
if (Extension->EscapeChar) {
if (HandFlow->FlowReplace & SERIAL_ERROR_CHAR) {
Status = STATUS_INVALID_PARAMETER;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
}
KeSynchronizeExecution(
Extension->Interrupt,
SerialSetHandFlow,
&S
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_MODEMSTATUS: {
SERIAL_IOCTL_SYNC S;
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(ULONG)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(ULONG);
S.Extension = Extension;
S.Data = Irp->AssociatedIrp.SystemBuffer;
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
KeSynchronizeExecution(
Extension->Interrupt,
SerialGetModemUpdate,
&S
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_GET_DTRRTS: {
ULONG ModemControl;
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(ULONG)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(ULONG);
Irp->IoStatus.Status = STATUS_SUCCESS;
//
// Reading this hardware has no effect on the device.
//
ModemControl = READ_MODEM_CONTROL(Extension->Controller);
ModemControl &= SERIAL_DTR_STATE | SERIAL_RTS_STATE;
*(PULONG)Irp->AssociatedIrp.SystemBuffer = ModemControl;
break;
}
case IOCTL_SERIAL_GET_COMMSTATUS: {
SERIAL_IOCTL_SYNC S;
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_STATUS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(SERIAL_STATUS);
S.Extension = Extension;
S.Data = Irp->AssociatedIrp.SystemBuffer;
//
// Acquire the cancel spin lock so nothing much
// changes while were getting the state.
//
IoAcquireCancelSpinLock(&OldIrql);
KeSynchronizeExecution(
Extension->Interrupt,
SerialGetCommStatus,
&S
);
IoReleaseCancelSpinLock(OldIrql);
break;
}
case IOCTL_SERIAL_GET_PROPERTIES: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIAL_COMMPROP)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
//
// No synchronization is required since this information
// is "static".
//
SerialGetProperties(
Extension,
Irp->AssociatedIrp.SystemBuffer
);
Irp->IoStatus.Information = sizeof(SERIAL_COMMPROP);
Irp->IoStatus.Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_XOFF_COUNTER: {
PSERIAL_XOFF_COUNTER Xc = Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(SERIAL_XOFF_COUNTER)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
if (Xc->Counter <= 0) {
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// So far so good. Put the irp onto the write queue.
//
return SerialStartOrQueue(
Extension,
Irp,
&Extension->WriteQueue,
&Extension->CurrentWriteIrp,
SerialStartWrite
);
}
case IOCTL_SERIAL_LSRMST_INSERT: {
PUCHAR escapeChar = Irp->AssociatedIrp.SystemBuffer;
//
// Make sure we get a byte.
//
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(UCHAR)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
if (*escapeChar) {
//
// We've got some escape work to do. We will make sure that
// the character is not the same as the Xon or Xoff character,
// or that we are already doing error replacement.
//
if ((*escapeChar == Extension->SpecialChars.XoffChar) ||
(*escapeChar == Extension->SpecialChars.XonChar) ||
(Extension->HandFlow.FlowReplace & SERIAL_ERROR_CHAR)) {
Status = STATUS_INVALID_PARAMETER;
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
}
KeSynchronizeExecution(
Extension->Interrupt,
SerialSetEscapeChar,
Irp
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
break;
}
case IOCTL_SERIAL_CONFIG_SIZE: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(ULONG)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(ULONG);
Irp->IoStatus.Status = STATUS_SUCCESS;
*(PULONG)Irp->AssociatedIrp.SystemBuffer = 0;
break;
}
case IOCTL_SERIAL_GET_STATS: {
if (IrpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(SERIALPERF_STATS)) {
Status = STATUS_BUFFER_TOO_SMALL;
break;
}
Irp->IoStatus.Information = sizeof(SERIALPERF_STATS);
Irp->IoStatus.Status = STATUS_SUCCESS;
KeSynchronizeExecution(
Extension->Interrupt,
SerialGetStats,
Irp
);
break;
}
case IOCTL_SERIAL_CLEAR_STATS: {
KeSynchronizeExecution(
Extension->Interrupt,
SerialClearStats,
Extension
);
break;
}
default: {
Status = STATUS_INVALID_PARAMETER;
break;
}
}
DoneWithIoctl:;
Irp->IoStatus.Status = Status;
SerialDump(
SERIRPPATH,
("SERIAL: Complete Irp: %x\n",Irp)
);
IoCompleteRequest(
Irp,
0
);
return Status;
}
VOID
DBusStartIo(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine starts an I/O operation for the device.
Arguments:
DeviceObject - Pointer to the device object.
Irp - Pointer to the request packet.
Return Value:
None.
--*/
{
PDEVICE_EXTENSION deviceExtension;
PIO_STACK_LOCATION irpSp;
BusPrint((2, "DBusStartIo: enter\n"));
deviceExtension = DeviceObject->DeviceExtension;
//
// Bump the error log sequence number.
//
deviceExtension->SequenceNumber += 1;
//
// Get a pointer to the current parameters for this request. The
// information is contained in the current stack location.
//
irpSp = IoGetCurrentIrpStackLocation(Irp);
//
// We know we got here with an internal device control request. Switch
// on IoControlCode.
//
switch(irpSp->Parameters.DeviceIoControl.IoControlCode) {
//
// Enable mouse interrupts, by calling BusEnableInterrupts
// synchronously.
//
case IOCTL_INTERNAL_MOUSE_ENABLE:
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusEnableInterrupts,
(PVOID) deviceExtension
);
BusPrint((
2,
"DBusStartIo: mouse enable (count %d)\n",
deviceExtension->MouseEnableCount
));
Irp->IoStatus.Status = STATUS_SUCCESS;
//
// Complete the request.
//
IoStartNextPacket(DeviceObject, FALSE);
IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
break;
//
// Disable mouse interrupts, by calling BusDisableInterrupts
// synchronously.
//
case IOCTL_INTERNAL_MOUSE_DISABLE:
BusPrint((2, "DBusStartIo: mouse disable"));
if (deviceExtension->MouseEnableCount == 0) {
//
// Mouse already disabled.
//
BusPrint((2, " - error\n"));
Irp->IoStatus.Status = STATUS_DEVICE_DATA_ERROR;
} else {
//
// Disable mouse by calling BusDisableInterrupts.
//
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusDisableInterrupts,
(PVOID) deviceExtension
);
BusPrint((
2,
" (count %d)\n",
deviceExtension->MouseEnableCount
));
Irp->IoStatus.Status = STATUS_SUCCESS;
}
//
// Complete the request.
//
IoStartNextPacket(DeviceObject, FALSE);
IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
break;
default:
BusPrint((2, "DBusStartIo: INVALID REQUEST\n"));
//
// Log an internal error. Note that we're calling the
// error log DPC routine directly, rather than duplicating
// code.
//
BusErrorLogDpc(
(PKDPC) NULL,
DeviceObject,
Irp,
(PVOID) (ULONG) BUSMOUSE_INVALID_STARTIO_REQUEST
);
ASSERT(FALSE);
break;
}
BusPrint((2, "DBusStartIo: exit\n"));
return;
}
VOID
DBusIsrDpc(
IN PKDPC Dpc,
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
/*++
Routine Description:
This routine runs at DISPATCH_LEVEL IRQL to finish processing
mouse interrupts. It is queued in the mouse ISR. The real
work is done via a callback to the connected mouse class driver.
Arguments:
Dpc - Pointer to the DPC object.
DeviceObject - Pointer to the device object.
Irp - Pointer to the Irp.
Context - Not used.
Return Value:
None.
--*/
{
PDEVICE_EXTENSION deviceExtension;
GET_DATA_POINTER_CONTEXT getPointerContext;
SET_DATA_POINTER_CONTEXT setPointerContext;
VARIABLE_OPERATION_CONTEXT operationContext;
PVOID classService;
PVOID classDeviceObject;
LONG interlockedResult;
BOOLEAN moreDpcProcessing;
ULONG dataNotConsumed = 0;
ULONG inputDataConsumed = 0;
LARGE_INTEGER deltaTime;
UNREFERENCED_PARAMETER(Dpc);
UNREFERENCED_PARAMETER(Irp);
UNREFERENCED_PARAMETER(Context);
BusPrint((2, "DBusIsrDpc: enter\n"));
deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
//
// Use DpcInterlockVariable to determine whether the DPC is running
// concurrently on another processor. We only want one instantiation
// of the DPC to actually do any work. DpcInterlockVariable is -1
// when no DPC is executing. We increment it, and if the result is
// zero then the current instantiation is the only one executing, and it
// is okay to proceed. Otherwise, we just return.
//
//
operationContext.VariableAddress =
&deviceExtension->DpcInterlockVariable;
operationContext.Operation = IncrementOperation;
operationContext.NewValue = &interlockedResult;
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusDpcVariableOperation,
(PVOID) &operationContext
);
moreDpcProcessing = (interlockedResult == 0)? TRUE:FALSE;
while (moreDpcProcessing) {
dataNotConsumed = 0;
inputDataConsumed = 0;
//
// Get the port InputData queue pointers synchronously.
//
getPointerContext.DeviceExtension = deviceExtension;
setPointerContext.DeviceExtension = deviceExtension;
setPointerContext.InputCount = 0;
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusGetDataQueuePointer,
(PVOID) &getPointerContext
);
if (getPointerContext.InputCount != 0) {
//
// Call the connected class driver's callback ISR with the
// port InputData queue pointers. If we have to wrap the queue,
// break the operation into two pieces, and call the class callback
// ISR once for each piece.
//
classDeviceObject =
deviceExtension->ConnectData.ClassDeviceObject;
classService =
deviceExtension->ConnectData.ClassService;
ASSERT(classService != NULL);
if (getPointerContext.DataOut >= getPointerContext.DataIn) {
//
// We'll have to wrap the InputData circular buffer. Call
// the class callback ISR with the chunk of data starting at
// DataOut and ending at the end of the queue.
//
BusPrint((
2,
"DBusIsrDpc: calling class callback\n"
));
BusPrint((
2,
"DBusIsrDpc: with Start 0x%x and End 0x%x\n",
getPointerContext.DataOut,
deviceExtension->DataEnd
));
(*(PSERVICE_CALLBACK_ROUTINE) classService)(
classDeviceObject,
getPointerContext.DataOut,
deviceExtension->DataEnd,
&inputDataConsumed
);
dataNotConsumed = (((PUCHAR)
deviceExtension->DataEnd -
(PUCHAR) getPointerContext.DataOut)
/ sizeof(MOUSE_INPUT_DATA)) - inputDataConsumed;
BusPrint((
2,
"DBusIsrDpc: (Wrap) Call callback consumed %d items, left %d\n",
inputDataConsumed,
dataNotConsumed
));
setPointerContext.InputCount += inputDataConsumed;
if (dataNotConsumed) {
setPointerContext.DataOut =
((PUCHAR)getPointerContext.DataOut) +
(inputDataConsumed * sizeof(MOUSE_INPUT_DATA));
} else {
setPointerContext.DataOut =
deviceExtension->InputData;
getPointerContext.DataOut = setPointerContext.DataOut;
}
}
//
// Call the class callback ISR with data remaining in the queue.
//
if ((dataNotConsumed == 0) &&
(inputDataConsumed < getPointerContext.InputCount)){
BusPrint((
2,
"DBusIsrDpc: calling class callback\n"
));
BusPrint((
2,
"DBusIsrDpc: with Start 0x%x and End 0x%x\n",
getPointerContext.DataOut,
getPointerContext.DataIn
));
(*(PSERVICE_CALLBACK_ROUTINE) classService)(
classDeviceObject,
getPointerContext.DataOut,
getPointerContext.DataIn,
&inputDataConsumed
);
dataNotConsumed = (((PUCHAR) getPointerContext.DataIn -
(PUCHAR) getPointerContext.DataOut)
/ sizeof(MOUSE_INPUT_DATA)) - inputDataConsumed;
BusPrint((
2,
"DBusIsrDpc: Call callback consumed %d items, left %d\n",
inputDataConsumed,
dataNotConsumed
));
setPointerContext.DataOut =
((PUCHAR)getPointerContext.DataOut) +
(inputDataConsumed * sizeof(MOUSE_INPUT_DATA));
setPointerContext.InputCount += inputDataConsumed;
}
//
// Update the port InputData queue DataOut pointer and InputCount
// synchronously.
//
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusSetDataQueuePointer,
(PVOID) &setPointerContext
);
}
if (dataNotConsumed) {
//
// The class driver was unable to consume all the data.
// Reset the interlocked variable to -1. We do not want
// to attempt to move more data to the class driver at this
// point, because it is already overloaded. Need to wait a
// while to give the Raw Input Thread a chance to read some
// of the data out of the class driver's queue. We accomplish
// this "wait" via a timer.
//
BusPrint((2, "DBusIsrDpc: set timer in DPC\n"));
operationContext.Operation = WriteOperation;
interlockedResult = -1;
operationContext.NewValue = &interlockedResult;
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusDpcVariableOperation,
(PVOID) &operationContext
);
deltaTime.LowPart = (ULONG)(-10 * 1000 * 1000);
deltaTime.HighPart = -1;
(VOID) KeSetTimer(
&deviceExtension->DataConsumptionTimer,
deltaTime,
&deviceExtension->IsrDpcRetry
);
moreDpcProcessing = FALSE;
} else {
//
// Decrement DpcInterlockVariable. If the result goes negative,
// then we're all finished processing the DPC. Otherwise, either
// the ISR incremented DpcInterlockVariable because it has more
// work for the ISR DPC to do, or a concurrent DPC executed on
// some processor while the current DPC was running (the
// concurrent DPC wouldn't have done any work). Make sure that
// the current DPC handles any extra work that is ready to be
// done.
//
operationContext.Operation = DecrementOperation;
operationContext.NewValue = &interlockedResult;
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusDpcVariableOperation,
(PVOID) &operationContext
);
if (interlockedResult != -1) {
//
// The interlocked variable is still greater than or equal to
// zero. Reset it to zero, so that we execute the loop one
// more time (assuming no more DPCs execute and bump the
// variable up again).
//
operationContext.Operation = WriteOperation;
interlockedResult = 0;
operationContext.NewValue = &interlockedResult;
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusDpcVariableOperation,
(PVOID) &operationContext
);
BusPrint((2, "BUSMOUSE-DBusIsrDpc: loop in DPC\n"));
} else {
moreDpcProcessing = FALSE;
}
}
}
BusPrint((2, "DBusIsrDpc: exit\n"));
}
NTSTATUS
DBusInternalDeviceControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine is the dispatch routine for internal device control requests.
Arguments:
DeviceObject - Pointer to the device object.
Irp - Pointer to the request packet.
Return Value:
Status is returned.
--*/
{
PIO_STACK_LOCATION irpSp;
PDEVICE_EXTENSION deviceExtension;
NTSTATUS status;
BusPrint((2,"DBusInternalDeviceControl: enter\n"));
//
// Get a pointer to the device extension.
//
deviceExtension = DeviceObject->DeviceExtension;
//
// Initialize the returned Information field.
//
Irp->IoStatus.Information = 0;
//
// Get a pointer to the current parameters for this request. The
// information is contained in the current stack location.
//
irpSp = IoGetCurrentIrpStackLocation(Irp);
//
// Case on the device control subfunction that is being performed by the
// requestor.
//
switch (irpSp->Parameters.DeviceIoControl.IoControlCode) {
//
// Connect a mouse class device driver to the port driver.
//
case IOCTL_INTERNAL_MOUSE_CONNECT:
BusPrint((
2,
"DBusInternalDeviceControl: mouse connect\n"
));
//
// Only allow one connection.
//
// FUTURE: Consider allowing multiple connections, just for
// the sake of generality?
//
if (deviceExtension->ConnectData.ClassService
!= NULL) {
BusPrint((
2,
"DBusInternalDeviceControl: error - already connected\n"
));
status = STATUS_SHARING_VIOLATION;
break;
} else
if (irpSp->Parameters.DeviceIoControl.InputBufferLength <
sizeof(CONNECT_DATA)) {
BusPrint((
2,
"DBusInternalDeviceControl: error - invalid buffer length\n"
));
status = STATUS_INVALID_PARAMETER;
break;
}
//
// Copy the connection parameters to the device extension.
//
deviceExtension->ConnectData =
*((PCONNECT_DATA) (irpSp->Parameters.DeviceIoControl.Type3InputBuffer));
//
// Reinitialize the port input data queue synchronously.
//
KeSynchronizeExecution(
deviceExtension->InterruptObject,
(PKSYNCHRONIZE_ROUTINE) BusInitializeDataQueue,
(PVOID) deviceExtension
);
//
// Set the completion status.
//
status = STATUS_SUCCESS;
break;
//
// Disconnect a mouse class device driver from the port driver.
//
// NOTE: Not implemented.
//
case IOCTL_INTERNAL_MOUSE_DISCONNECT:
BusPrint((
2,
"DBusInternalDeviceControl: mouse disconnect\n"
));
//
// Perform a mouse interrupt disable call.
//
//
// Clear the connection parameters in the device extension.
// NOTE: Must synchronize this with the mouse ISR.
//
//
//deviceExtension->ConnectData.ClassDeviceObject =
// Null;
//deviceExtension->ConnectData.ClassService =
// Null;
//
// Set the completion status.
//
status = STATUS_NOT_IMPLEMENTED;
break;
//
// Enable mouse interrupts (mark the request pending and handle
// it in StartIo).
//
case IOCTL_INTERNAL_MOUSE_ENABLE:
BusPrint((
2,
"DBusInternalDeviceControl: mouse enable\n"
));
status = STATUS_PENDING;
break;
//
// Disable mouse interrupts (mark the request pending and handle
// it in StartIo).
//
case IOCTL_INTERNAL_MOUSE_DISABLE:
BusPrint((
2,
"DBusInternalDeviceControl: mouse disable\n"
));
status = STATUS_PENDING;
break;
//
// Query the mouse attributes. First check for adequate buffer
// length. Then, copy the mouse attributes from the device
// extension to the output buffer.
//
case IOCTL_MOUSE_QUERY_ATTRIBUTES:
BusPrint((
2,
"DBusInternalDeviceControl: mouse query attributes\n"
));
if (irpSp->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(MOUSE_ATTRIBUTES)) {
status = STATUS_BUFFER_TOO_SMALL;
} else {
//
// Copy the attributes from the DeviceExtension to the
// buffer.
//
*(PMOUSE_ATTRIBUTES) Irp->AssociatedIrp.SystemBuffer =
deviceExtension->Configuration.MouseAttributes;
Irp->IoStatus.Information = sizeof(MOUSE_ATTRIBUTES);
status = STATUS_SUCCESS;
}
break;
default:
BusPrint((
2,
"DBusInternalDeviceControl: INVALID REQUEST\n"
));
status = STATUS_INVALID_DEVICE_REQUEST;
break;
}
Irp->IoStatus.Status = status;
if (status == STATUS_PENDING) {
IoMarkIrpPending(Irp);
IoStartPacket(DeviceObject, Irp, (PULONG)NULL, NULL);
} else {
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
BusPrint((2,"DBusInternalDeviceControl: exit\n"));
return(status);
}
VOID
SerialStartTimerLowerRTS(
IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemContext1,
IN PVOID SystemContext2
)
/*++
Routine Description:
This routine starts a timer that when it expires will start
a dpc that will check if it can lower the rts line because
there are no characters in the hardware.
Arguments:
Dpc - Not Used.
DeferredContext - Really points to the device extension.
SystemContext1 - Not Used.
SystemContext2 - Not Used.
Return Value:
None.
--*/
{
PSERIAL_DEVICE_EXTENSION Extension = DeferredContext;
LARGE_INTEGER CharTime;
KIRQL OldIrql;
UNREFERENCED_PARAMETER(Dpc);
UNREFERENCED_PARAMETER(SystemContext1);
UNREFERENCED_PARAMETER(SystemContext2);
//
// Take out the lock to prevent the line control
// from changing out from under us while we calculate
// a character time.
//
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
CharTime = SerialGetCharTime(Extension);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
CharTime.QuadPart = -CharTime.QuadPart;
if (KeSetTimer(
&Extension->LowerRTSTimer,
CharTime,
&Extension->PerhapsLowerRTSDpc
)) {
//
// The timer was already in the timer queue. This implies
// that one path of execution that was trying to lower
// the RTS has "died". Synchronize with the ISR so that
// we can lower the count.
//
KeSynchronizeExecution(
Extension->Interrupt,
SerialDecrementRTSCounter,
Extension
);
}
}
///////////////////////////////////////////////////////////////////////////////
//
// OsrAdapterControlRead
//
// This is routine is called by the I/O Manager when the Adapter resources
// (such as map registers) requested by the OsrStartReadIrp function are
// available for our use.
//
// INPUTS:
//
// DeviceObject - Address of the DEVICE_OBJECT for our device.
//
// MapRegisterBase - Base address of the Map registers that have been
// reserved for us use.
//
// Context - address of the Read Irp for the operation to be started
//
// OUTPUTS:
//
// None.
//
// RETURNS:
//
// DeallocateObjectKeepRegisters - indicates that the Mapping Registers that
// were allocated to us should not be deallocated at this time. We
// will deallocate them from the DpcForIsr when the Read completes.
//
// IRQL:
//
// This routine is called at IRQL_DISPATCH_LEVEL.
//
// NOTES:
//
///////////////////////////////////////////////////////////////////////////////
IO_ALLOCATION_ACTION
OsrAdapterControlRead(IN PDEVICE_OBJECT DeviceObject, IN PIRP NotUsed,
IN PVOID MapRegisterBase, IN PVOID Context)
{
PIRP irp = (PIRP) Context;
PIO_STACK_LOCATION ioStack;
POSR_DEVICE_EXT devExt;
PUCHAR baseVa;
#if DBG
DbgPrint("AdapterControlRead: Irp = 0x%0x\n", irp);
DbgPrint("AdapterControlRead: Map Register Base = 0x%0x\n", MapRegisterBase);
#endif
devExt = DeviceObject->DeviceExtension;
ioStack = IoGetCurrentIrpStackLocation(irp);
devExt->ReadLength = ioStack->Parameters.Read.Length - devExt->ReadSoFar;
#if DBG
DbgPrint("AdapterControlRead: Length remaining = %d. \n", devExt->ReadLength);
#endif
//
// Get set-up for the transfer
//
devExt->ReadMapRegBase = MapRegisterBase;
devExt->ReadStartingOffset = devExt->ReadSoFar;
//
// Get requestor's virtual address of the buffer. This is used by
// IoMapTransfer() as an index into the buffer to track the progress
// of the map operation.
//
baseVa = MmGetMdlVirtualAddress(irp->MdlAddress);
//
// Get the logical base address and length of a fragment of the
// requestor's buffer.
//
// Even though we are a Busmaster device, our device does not support
// scatter/gather. Thus, we can only use a single base address and length
// at a time. If the requestor's buffer has more fragments, we will
// do additional DMA operations (one for each fragment) until the entire
// transfer has been completed.
//
devExt->ReadPaToDevice = IoMapTransfer(devExt->ReadAdapter,
irp->MdlAddress,
MapRegisterBase,
baseVa+(devExt->ReadSoFar),
&devExt->ReadLength,
FALSE); // FALSE = READ from device
//
// Track the length of the requestor's buffer we've read so far.
//
devExt->ReadSoFar += devExt->ReadLength;
//
// Start the request on the device -- Base Address and Length
// of this fragment are stored in the device extension
//
(VOID)KeSynchronizeExecution(devExt->InterruptObject,
OsrStartReadOnDevice,
DeviceObject);
return(DeallocateObjectKeepRegisters);
}
IO_ALLOCATION_ACTION
sndProgramDMA(
IN PDEVICE_OBJECT pDO,
IN PIRP pIrp,
IN PVOID pMRB,
IN PVOID Context
)
/*++
Routine Description:
This routine is executed when an adapter channel is allocated
for our DMA needs.
Arguments:
pDO - Device object
pIrp - IO request packet
pMRB -
Context - Which buffer are we using
Return Value:
Tell the system what to do with the adapter object
--*/
{
PGLOBAL_DEVICE_INFO pGDI;
int WhichBuffer;
UNREFERENCED_PARAMETER(pIrp);
WhichBuffer = (int) Context;
pGDI = ((PLOCAL_DEVICE_INFO)pDO->DeviceExtension)->pGlobalInfo;
pGDI->pMRB[WhichBuffer] = pMRB;
sndReStartDMA(pGDI, WhichBuffer);
//
// return a value that says we want to keep the channel
// and map registers.
//
if (WhichBuffer == 0) {
//
// Do the other one.
//
if (pGDI->Usage == SoundInterruptUsageWaveIn) {
dprintf4("Allocating adapter channel (buffer = 3)");
IoAllocateAdapterChannel(pGDI->pAdapterObject[3],
pGDI->pWaveInDevObj,
BYTES_TO_PAGES(pGDI->DmaHalfBufferSize),
sndProgramDMA,
(PVOID)1); // next buffer
} else {
dprintf4("Allocating adapter channel (buffer = 1)");
IoAllocateAdapterChannel(pGDI->pAdapterObject[1],
pGDI->pWaveOutDevObj,
BYTES_TO_PAGES(pGDI->DmaHalfBufferSize),
sndProgramDMA,
(PVOID)1); // next buffer
}
//
// Execution will continue in sndProgramDMA when the
// adapter has been allocated (AGAIN)
//
} else {
//
// Now program the hardware on the card to begin the transfer.
// Note that this must be synchronized with the isr
//
dprintf4("Calling (sync) sndInitiate");
KeSynchronizeExecution(pGDI->pInterrupt,
pGDI->StartDMA,
pGDI);
//
// Execution continues in the SoundInitiate routine
//
}
return KeepObject;
}
NTSTATUS NTAPI
SerialDeviceControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PIO_STACK_LOCATION Stack;
ULONG IoControlCode;
PSERIAL_DEVICE_EXTENSION DeviceExtension;
ULONG LengthIn, LengthOut;
ULONG_PTR Information = 0;
PVOID BufferIn, BufferOut;
PUCHAR ComPortBase;
NTSTATUS Status;
TRACE_(SERIAL, "IRP_MJ_DEVICE_CONTROL dispatch\n");
Stack = IoGetCurrentIrpStackLocation(Irp);
LengthIn = Stack->Parameters.DeviceIoControl.InputBufferLength;
LengthOut = Stack->Parameters.DeviceIoControl.OutputBufferLength;
DeviceExtension = (PSERIAL_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
ComPortBase = ULongToPtr(DeviceExtension->BaseAddress);
IoControlCode = Stack->Parameters.DeviceIoControl.IoControlCode;
SerialGetUserBuffers(Irp, IoControlCode, &BufferIn, &BufferOut);
/* FIXME: need to probe buffers */
/* FIXME: see http://www.osronline.com/ddkx/serial/serref_61bm.htm */
switch (IoControlCode)
{
case IOCTL_SERIAL_CLEAR_STATS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_CLEAR_STATS\n");
KeSynchronizeExecution(
DeviceExtension->Interrupt,
(PKSYNCHRONIZE_ROUTINE)SerialClearPerfStats,
DeviceExtension);
Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_CLR_DTR:
{
TRACE_(SERIAL, "IOCTL_SERIAL_CLR_DTR\n");
/* FIXME: If the handshake flow control of the device is configured to
* automatically use DTR, return STATUS_INVALID_PARAMETER */
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
DeviceExtension->MCR &= ~SR_MCR_DTR;
WRITE_PORT_UCHAR(SER_MCR(ComPortBase), DeviceExtension->MCR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
break;
}
case IOCTL_SERIAL_CLR_RTS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_CLR_RTS\n");
/* FIXME: If the handshake flow control of the device is configured to
* automatically use RTS, return STATUS_INVALID_PARAMETER */
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
DeviceExtension->MCR &= ~SR_MCR_RTS;
WRITE_PORT_UCHAR(SER_MCR(ComPortBase), DeviceExtension->MCR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
break;
}
case IOCTL_SERIAL_CONFIG_SIZE:
{
/* Obsolete on Microsoft Windows 2000+ */
PULONG pConfigSize;
TRACE_(SERIAL, "IOCTL_SERIAL_CONFIG_SIZE\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pConfigSize = (PULONG)BufferOut;
*pConfigSize = 0;
Information = sizeof(ULONG);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_BAUD_RATE:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_BAUD_RATE\n");
if (LengthOut < sizeof(SERIAL_BAUD_RATE))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
((PSERIAL_BAUD_RATE)BufferOut)->BaudRate = DeviceExtension->BaudRate;
Information = sizeof(SERIAL_BAUD_RATE);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_CHARS:
{
/* FIXME */
PSERIAL_CHARS pSerialChars;
ERR_(SERIAL, "IOCTL_SERIAL_GET_CHARS not implemented.\n");
if (LengthOut < sizeof(SERIAL_CHARS))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pSerialChars = (PSERIAL_CHARS)BufferOut;
pSerialChars->EofChar = 0;
pSerialChars->ErrorChar = 0;
pSerialChars->BreakChar = 0;
pSerialChars->EventChar = 0;
pSerialChars->XonChar = 0;
pSerialChars->XoffChar = 0;
Information = sizeof(SERIAL_CHARS);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_COMMSTATUS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_COMMSTATUS\n");
if (LengthOut < sizeof(SERIAL_STATUS))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
Status = SerialGetCommStatus((PSERIAL_STATUS)BufferOut, DeviceExtension);
Information = sizeof(SERIAL_STATUS);
}
break;
}
case IOCTL_SERIAL_GET_DTRRTS:
{
PULONG pDtrRts;
TRACE_(SERIAL, "IOCTL_SERIAL_GET_DTRRTS\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pDtrRts = (PULONG)BufferOut;
*pDtrRts = 0;
if (DeviceExtension->MCR & SR_MCR_DTR)
*pDtrRts |= SERIAL_DTR_STATE;
if (DeviceExtension->MCR & SR_MCR_RTS)
*pDtrRts |= SERIAL_RTS_STATE;
Information = sizeof(ULONG);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_HANDFLOW:
{
/* FIXME */
PSERIAL_HANDFLOW pSerialHandflow;
ERR_(SERIAL, "IOCTL_SERIAL_GET_HANDFLOW not implemented.\n");
if (LengthOut < sizeof(SERIAL_HANDFLOW))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pSerialHandflow = (PSERIAL_HANDFLOW)BufferOut;
pSerialHandflow->ControlHandShake = 0;
pSerialHandflow->FlowReplace = 0;
pSerialHandflow->XonLimit = 0;
pSerialHandflow->XoffLimit = 0;
Information = sizeof(SERIAL_HANDFLOW);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_LINE_CONTROL:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_LINE_CONTROL\n");
if (LengthOut < sizeof(SERIAL_LINE_CONTROL))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
*((PSERIAL_LINE_CONTROL)BufferOut) = DeviceExtension->SerialLineControl;
Information = sizeof(SERIAL_LINE_CONTROL);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_MODEM_CONTROL:
{
PULONG pMCR;
TRACE_(SERIAL, "IOCTL_SERIAL_GET_MODEM_CONTROL\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pMCR = (PULONG)BufferOut;
*pMCR = DeviceExtension->MCR;
Information = sizeof(ULONG);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_MODEMSTATUS:
{
PULONG pMSR;
TRACE_(SERIAL, "IOCTL_SERIAL_GET_MODEMSTATUS\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pMSR = (PULONG)BufferOut;
*pMSR = DeviceExtension->MSR;
Information = sizeof(ULONG);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_PROPERTIES:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_PROPERTIES\n");
if (LengthOut < sizeof(SERIAL_COMMPROP))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
Status = SerialGetCommProp((PSERIAL_COMMPROP)BufferOut, DeviceExtension);
Information = sizeof(SERIAL_COMMPROP);
}
break;
}
case IOCTL_SERIAL_GET_STATS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_STATS\n");
if (LengthOut < sizeof(SERIALPERF_STATS))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
KeSynchronizeExecution(DeviceExtension->Interrupt,
(PKSYNCHRONIZE_ROUTINE)SerialGetPerfStats, Irp);
Information = sizeof(SERIALPERF_STATS);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_TIMEOUTS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_GET_TIMEOUTS\n");
if (LengthOut != sizeof(SERIAL_TIMEOUTS) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
*(PSERIAL_TIMEOUTS)BufferOut = DeviceExtension->SerialTimeOuts;
Information = sizeof(SERIAL_TIMEOUTS);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_GET_WAIT_MASK:
{
PULONG pWaitMask;
TRACE_(SERIAL, "IOCTL_SERIAL_GET_WAIT_MASK\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pWaitMask = (PULONG)BufferOut;
*pWaitMask = DeviceExtension->WaitMask;
Information = sizeof(ULONG);
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_IMMEDIATE_CHAR:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_IMMEDIATE_CHAR not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_LSRMST_INSERT:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_LSRMST_INSERT not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_PURGE:
{
KIRQL Irql;
TRACE_(SERIAL, "IOCTL_SERIAL_PURGE\n");
/* FIXME: SERIAL_PURGE_RXABORT and SERIAL_PURGE_TXABORT
* should stop current request */
if (LengthIn != sizeof(ULONG) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
ULONG PurgeMask = *(PULONG)BufferIn;
Status = STATUS_SUCCESS;
/* FIXME: use SERIAL_PURGE_RXABORT and SERIAL_PURGE_TXABORT flags */
if (PurgeMask & SERIAL_PURGE_RXCLEAR)
{
KeAcquireSpinLock(&DeviceExtension->InputBufferLock, &Irql);
DeviceExtension->InputBuffer.ReadPosition = DeviceExtension->InputBuffer.WritePosition = 0;
if (DeviceExtension->UartType >= Uart16550A)
{
/* Clear also Uart FIFO */
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
WRITE_PORT_UCHAR(SER_FCR(ComPortBase), SR_FCR_CLEAR_RCVR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
KeReleaseSpinLock(&DeviceExtension->InputBufferLock, Irql);
}
if (PurgeMask & SERIAL_PURGE_TXCLEAR)
{
KeAcquireSpinLock(&DeviceExtension->OutputBufferLock, &Irql);
DeviceExtension->OutputBuffer.ReadPosition = DeviceExtension->OutputBuffer.WritePosition = 0;
if (DeviceExtension->UartType >= Uart16550A)
{
/* Clear also Uart FIFO */
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
WRITE_PORT_UCHAR(SER_FCR(ComPortBase), SR_FCR_CLEAR_XMIT);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
KeReleaseSpinLock(&DeviceExtension->OutputBufferLock, Irql);
}
}
break;
}
case IOCTL_SERIAL_RESET_DEVICE:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_RESET_DEVICE not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_SET_BAUD_RATE:
{
PULONG pNewBaudRate;
TRACE_(SERIAL, "IOCTL_SERIAL_SET_BAUD_RATE\n");
if (LengthIn != sizeof(ULONG) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
pNewBaudRate = (PULONG)BufferIn;
Status = SerialSetBaudRate(DeviceExtension, *pNewBaudRate);
}
break;
}
case IOCTL_SERIAL_SET_BREAK_OFF:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_BREAK_OFF not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_SET_BREAK_ON:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_BREAK_ON not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_SET_CHARS:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_CHARS not implemented.\n");
Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_SET_DTR:
{
/* FIXME: If the handshake flow control of the device is configured to
* automatically use DTR, return STATUS_INVALID_PARAMETER */
TRACE_(SERIAL, "IOCTL_SERIAL_SET_DTR\n");
if (!(DeviceExtension->MCR & SR_MCR_DTR))
{
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
DeviceExtension->MCR |= SR_MCR_DTR;
WRITE_PORT_UCHAR(SER_MCR(ComPortBase), DeviceExtension->MCR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
else
Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_SET_FIFO_CONTROL:
{
TRACE_(SERIAL, "IOCTL_SERIAL_SET_FIFO_CONTROL\n");
if (LengthIn != sizeof(ULONG) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
WRITE_PORT_UCHAR(SER_FCR(ComPortBase), (UCHAR)((*(PULONG)BufferIn) & 0xff));
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
break;
}
case IOCTL_SERIAL_SET_HANDFLOW:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_HANDFLOW not implemented.\n");
Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_SET_LINE_CONTROL:
{
TRACE_(SERIAL, "IOCTL_SERIAL_SET_LINE_CONTROL\n");
if (LengthIn < sizeof(SERIAL_LINE_CONTROL))
Status = STATUS_BUFFER_TOO_SMALL;
else if (BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
Status = SerialSetLineControl(DeviceExtension, (PSERIAL_LINE_CONTROL)BufferIn);
break;
}
case IOCTL_SERIAL_SET_MODEM_CONTROL:
{
PULONG pMCR;
TRACE_(SERIAL, "IOCTL_SERIAL_SET_MODEM_CONTROL\n");
if (LengthIn != sizeof(ULONG) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
pMCR = (PULONG)BufferIn;
DeviceExtension->MCR = (UCHAR)(*pMCR & 0xff);
WRITE_PORT_UCHAR(SER_MCR(ComPortBase), DeviceExtension->MCR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
break;
}
case IOCTL_SERIAL_SET_QUEUE_SIZE:
{
if (LengthIn < sizeof(SERIAL_QUEUE_SIZE ))
return STATUS_BUFFER_TOO_SMALL;
else if (BufferIn == NULL)
return STATUS_INVALID_PARAMETER;
else
{
KIRQL Irql;
PSERIAL_QUEUE_SIZE NewQueueSize = (PSERIAL_QUEUE_SIZE)BufferIn;
Status = STATUS_SUCCESS;
if (NewQueueSize->InSize > DeviceExtension->InputBuffer.Length)
{
KeAcquireSpinLock(&DeviceExtension->InputBufferLock, &Irql);
Status = IncreaseCircularBufferSize(&DeviceExtension->InputBuffer, NewQueueSize->InSize);
KeReleaseSpinLock(&DeviceExtension->InputBufferLock, Irql);
}
if (NT_SUCCESS(Status) && NewQueueSize->OutSize > DeviceExtension->OutputBuffer.Length)
{
KeAcquireSpinLock(&DeviceExtension->OutputBufferLock, &Irql);
Status = IncreaseCircularBufferSize(&DeviceExtension->OutputBuffer, NewQueueSize->OutSize);
KeReleaseSpinLock(&DeviceExtension->OutputBufferLock, Irql);
}
}
break;
}
case IOCTL_SERIAL_SET_RTS:
{
/* FIXME: If the handshake flow control of the device is configured to
* automatically use DTR, return STATUS_INVALID_PARAMETER */
TRACE_(SERIAL, "IOCTL_SERIAL_SET_RTS\n");
if (!(DeviceExtension->MCR & SR_MCR_RTS))
{
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
if (NT_SUCCESS(Status))
{
DeviceExtension->MCR |= SR_MCR_RTS;
WRITE_PORT_UCHAR(SER_MCR(ComPortBase), DeviceExtension->MCR);
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, ULongToPtr(DeviceExtension->ComPort));
}
}
else
Status = STATUS_SUCCESS;
break;
}
case IOCTL_SERIAL_SET_TIMEOUTS:
{
TRACE_(SERIAL, "IOCTL_SERIAL_SET_TIMEOUTS\n");
if (LengthIn != sizeof(SERIAL_TIMEOUTS) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
DeviceExtension->SerialTimeOuts = *(PSERIAL_TIMEOUTS)BufferIn;
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_SET_WAIT_MASK:
{
PULONG pWaitMask = (PULONG)BufferIn;
TRACE_(SERIAL, "IOCTL_SERIAL_SET_WAIT_MASK\n");
if (LengthIn != sizeof(ULONG) || BufferIn == NULL)
Status = STATUS_INVALID_PARAMETER;
else if (DeviceExtension->WaitOnMaskIrp) /* FIXME: Race condition ; field may be currently in modification */
{
WARN_(SERIAL, "An IRP is already currently processed\n");
Status = STATUS_INVALID_PARAMETER;
}
else
{
DeviceExtension->WaitMask = *pWaitMask;
Status = STATUS_SUCCESS;
}
break;
}
case IOCTL_SERIAL_SET_XOFF:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_XOFF not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_SET_XON:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_SET_XON not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
case IOCTL_SERIAL_WAIT_ON_MASK:
{
PIRP WaitingIrp;
TRACE_(SERIAL, "IOCTL_SERIAL_WAIT_ON_MASK\n");
if (LengthOut != sizeof(ULONG) || BufferOut == NULL)
Status = STATUS_INVALID_PARAMETER;
else
{
IoMarkIrpPending(Irp);
WaitingIrp = InterlockedCompareExchangePointer(
&DeviceExtension->WaitOnMaskIrp,
Irp,
NULL);
/* Check if an Irp is already pending */
if (WaitingIrp != NULL)
{
/* Unable to have a 2nd pending IRP for this IOCTL */
WARN_(SERIAL, "Unable to pend a second IRP for IOCTL_SERIAL_WAIT_ON_MASK\n");
Irp->IoStatus.Information = 0;
Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
return STATUS_PENDING;
}
break;
}
case IOCTL_SERIAL_XOFF_COUNTER:
{
/* FIXME */
ERR_(SERIAL, "IOCTL_SERIAL_XOFF_COUNTER not implemented.\n");
Status = STATUS_NOT_IMPLEMENTED;
break;
}
default:
{
/* Pass Irp to lower driver */
TRACE_(SERIAL, "Unknown IOCTL code 0x%x\n", Stack->Parameters.DeviceIoControl.IoControlCode);
IoSkipCurrentIrpStackLocation(Irp);
return IoCallDriver(DeviceExtension->LowerDevice, Irp);
}
}
Irp->IoStatus.Status = Status;
if (Status == STATUS_PENDING)
{
IoMarkIrpPending(Irp);
}
else
{
Irp->IoStatus.Information = Information;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
return Status;
}
NTSTATUS
SerialStartPurge(
IN PSERIAL_DEVICE_EXTENSION Extension
)
/*++
Routine Description:
Depending on the mask in the current irp, purge the interrupt
buffer, the read queue, or the write queue, or all of the above.
Arguments:
Extension - Pointer to the device extension.
Return Value:
Will return STATUS_SUCCESS always. This is reasonable
since the DPC completion code that calls this routine doesn't
care and the purge request always goes through to completion
once it's started.
--*/
{
PIRP NewIrp;
do {
ULONG Mask;
Mask = *((ULONG *)
(Extension->CurrentPurgeIrp->AssociatedIrp.SystemBuffer));
if (Mask & SERIAL_PURGE_TXABORT) {
SerialKillAllReadsOrWrites(
Extension->DeviceObject,
&Extension->WriteQueue,
&Extension->CurrentWriteIrp
);
SerialKillAllReadsOrWrites(
Extension->DeviceObject,
&Extension->WriteQueue,
&Extension->CurrentXoffIrp
);
}
if (Mask & SERIAL_PURGE_RXABORT) {
SerialKillAllReadsOrWrites(
Extension->DeviceObject,
&Extension->ReadQueue,
&Extension->CurrentReadIrp
);
}
if (Mask & SERIAL_PURGE_RXCLEAR) {
KIRQL OldIrql;
//
// Clean out the interrupt buffer.
//
// Note that we do this under protection of the
// the drivers control lock so that we don't hose
// the pointers if there is currently a read that
// is reading out of the buffer.
//
KeAcquireSpinLock(
&Extension->ControlLock,
&OldIrql
);
KeSynchronizeExecution(
Extension->Interrupt,
SerialPurgeInterruptBuff,
Extension
);
KeReleaseSpinLock(
&Extension->ControlLock,
OldIrql
);
}
Extension->CurrentPurgeIrp->IoStatus.Status = STATUS_SUCCESS;
Extension->CurrentPurgeIrp->IoStatus.Information = 0;
SerialGetNextIrp(
&Extension->CurrentPurgeIrp,
&Extension->PurgeQueue,
&NewIrp,
TRUE
);
} while (NewIrp);
return STATUS_SUCCESS;
}
BOOLEAN
KspSynchronizedEventRoutine(
IN KSEVENTS_LOCKTYPE EventsFlags,
IN PVOID EventsLock,
IN PKSEVENT_SYNCHRONIZED_ROUTINE SynchronizedRoutine,
IN PKSEVENT_CTX Ctx)
{
BOOLEAN Result = FALSE;
KIRQL OldLevel;
if (EventsFlags == KSEVENTS_NONE)
{
/* no synchronization required */
Result = SynchronizedRoutine(Ctx);
}
else if (EventsFlags == KSEVENTS_SPINLOCK)
{
/* use spin lock */
KeAcquireSpinLock((PKSPIN_LOCK)EventsLock, &OldLevel);
Result = SynchronizedRoutine(Ctx);
KeReleaseSpinLock((PKSPIN_LOCK)EventsLock, OldLevel);
}
else if (EventsFlags == KSEVENTS_MUTEX)
{
/* use a mutex */
KeWaitForSingleObject(EventsLock, Executive, KernelMode, FALSE, NULL);
Result = SynchronizedRoutine(Ctx);
KeReleaseMutex((PRKMUTEX)EventsLock, FALSE);
}
else if (EventsFlags == KSEVENTS_FMUTEX)
{
/* use a fast mutex */
ExAcquireFastMutex((PFAST_MUTEX)EventsLock);
Result = SynchronizedRoutine(Ctx);
ExReleaseFastMutex((PFAST_MUTEX)EventsLock);
}
else if (EventsFlags == KSEVENTS_FMUTEXUNSAFE)
{
/* acquire fast mutex unsafe */
KeEnterCriticalRegion();
ExAcquireFastMutexUnsafe((PFAST_MUTEX)EventsLock);
Result = SynchronizedRoutine(Ctx);
ExReleaseFastMutexUnsafe((PFAST_MUTEX)EventsLock);
KeLeaveCriticalRegion();
}
else if (EventsFlags == KSEVENTS_INTERRUPT)
{
/* use interrupt for locking */
Result = KeSynchronizeExecution((PKINTERRUPT)EventsLock, (PKSYNCHRONIZE_ROUTINE)SynchronizedRoutine, (PVOID)Ctx);
}
else if (EventsFlags == KSEVENTS_ERESOURCE)
{
/* use an eresource */
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite((PERESOURCE)EventsLock, TRUE);
Result = SynchronizedRoutine(Ctx);
ExReleaseResourceLite((PERESOURCE)EventsLock);
KeLeaveCriticalRegion();
}
return Result;
}