How to make a USB control request in a timer callback... [Device Drivers]

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From: sinosoidal on 29 Dec 2009 11:38

Hi,

I'm trying to make the following in a timer callback:

VOID
DpxMttCalibrationStateEvtTimerFunction(
IN WDFTIMER Timer
)
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_EXTENSION devContext =
GetDeviceContext(WdfTimerGetParentObject(Timer));

UCHAR CalibrationState;

status = DpxMttGetCalibrationState(devContext,&CalibrationState);

if (status==STATUS_SUCCESS)
{
if (devContext->Context.State.Calibrated==0)
{
if (CalibrationState==1)
devContext->Context.State.Calibrated = 1;
else
devContext->Context.State.Calibrated = 0;
}
}
else
{
devContext->Context.State.Calibrated = 0;
}
}

where

NTSTATUS
DpxMttGetCalibrationState(
IN PDEVICE_EXTENSION devContext,
OUT PUCHAR CalibrationState
)
{
NTSTATUS status = STATUS_SUCCESS;
WDF_MEMORY_DESCRIPTOR memDesc;
WDF_USB_CONTROL_SETUP_PACKET controlSetupPacket;
ULONG bytesTransferred = 0;

WDF_USB_CONTROL_SETUP_PACKET_INIT_VENDOR(&controlSetupPacket,
BmRequestDeviceToHost,
BmRequestToDevice,
0x03,
0,
0);

WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&memDesc,
CalibrationState,
sizeof(UCHAR));

status = WdfUsbTargetDeviceSendControlTransferSynchronously(
devContext->UsbDevice,
NULL, // Optional WDFREQUEST
NULL, //
PWDF_REQUEST_SEND_OPTIONS
&controlSetupPacket,
&memDesc,
&bytesTransferred
);

return status;
}

But this always results in a blue screen! why?

The same happens when I put it on the usb frame arrival callback.

The only place it worked in know was in device io control events handler.

I need to do this inside the kernel without being triggered from outside.

Any tips?

thanks,

Nuno

From: Don Burn on 29 Dec 2009 11:45

You are issuing a call that can only be used at PASSIVE_LEVEL at
DISPATCH_LEVEL. The EvtTimerFunc is a DPC routine that runs at
DISPATCH_LEVEL. Use a WDF work item from the EvtTimerFunc to get a
function running at PASSIVE.

--
Don Burn (MVP, Windows DKD)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr
Remove StopSpam to reply

"sinosoidal" <sinosoidal(a)discussions.microsoft.com> wrote in message
news:A709505F-3663-4800-8279-B5154C2E8037(a)microsoft.com...
> Hi,
>
> I'm trying to make the following in a timer callback:
>
> VOID
> DpxMttCalibrationStateEvtTimerFunction(
> IN WDFTIMER Timer
> )
> {
> NTSTATUS status = STATUS_SUCCESS;
> PDEVICE_EXTENSION devContext =
> GetDeviceContext(WdfTimerGetParentObject(Timer));
>
> UCHAR CalibrationState;
>
> status = DpxMttGetCalibrationState(devContext,&CalibrationState);
>
> if (status==STATUS_SUCCESS)
> {
> if (devContext->Context.State.Calibrated==0)
> {
> if (CalibrationState==1)
> devContext->Context.State.Calibrated = 1;
> else
> devContext->Context.State.Calibrated = 0;
> }
> }
> else
> {
> devContext->Context.State.Calibrated = 0;
> }
> }
>
>
> where
>
> NTSTATUS
> DpxMttGetCalibrationState(
> IN PDEVICE_EXTENSION devContext,
> OUT PUCHAR CalibrationState
> )
> {
> NTSTATUS status = STATUS_SUCCESS;
> WDF_MEMORY_DESCRIPTOR memDesc;
> WDF_USB_CONTROL_SETUP_PACKET controlSetupPacket;
> ULONG bytesTransferred = 0;
>
> WDF_USB_CONTROL_SETUP_PACKET_INIT_VENDOR(&controlSetupPacket,
> BmRequestDeviceToHost,
> BmRequestToDevice,
> 0x03,
> 0,
> 0);
>
> WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&memDesc,
> CalibrationState,
> sizeof(UCHAR));
>
> status = WdfUsbTargetDeviceSendControlTransferSynchronously(
> devContext->UsbDevice,
> NULL, // Optional
> WDFREQUEST
> NULL, //
> PWDF_REQUEST_SEND_OPTIONS
> &controlSetupPacket,
> &memDesc,
> &bytesTransferred
> );
>
> return status;
> }
>
> But this always results in a blue screen! why?
>
> The same happens when I put it on the usb frame arrival callback.
>
> The only place it worked in know was in device io control events handler.
>
> I need to do this inside the kernel without being triggered from outside.
>
> Any tips?
>
> thanks,
>
> Nuno
>
> __________ Information from ESET NOD32 Antivirus, version of virus
> signature database 4725 (20091229) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>

__________ Information from ESET NOD32 Antivirus, version of virus signature database 4725 (20091229) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

From: sinosoidal on 30 Dec 2009 07:58

Hi Don,

I have followed your suggestions and have made the following but it fails to
create the work item with the error:

c0200212

which i'm not sure what it really means because it doesnt appear in ntstatus.h

Ayn tips?

Thanks,

Nuno

VOID
ReadWriteWorkItem(
IN WDFWORKITEM WorkItem
)
{
PWORKITEM_CONTEXT pItemContext;
NTSTATUS status;

pItemContext = GetWorkItemContext(WorkItem);

status = DpxMttGetCalibrationState(pItemContext->DevContext);

if (!NT_SUCCESS(status))
{
//UsbSamp_DbgPrint(1, ("ResetPipe failed 0x%x\n", status));
}

WdfObjectDelete(WorkItem);

return;
}

NTSTATUS
QueuePassiveLevelCallback(
IN PDEVICE_EXTENSION devContext
)
{
NTSTATUS status = STATUS_SUCCESS;
PWORKITEM_CONTEXT context;
WDF_OBJECT_ATTRIBUTES attributes;
WDF_WORKITEM_CONFIG workitemConfig;
WDFWORKITEM hWorkItem;

WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
WDF_OBJECT_ATTRIBUTES_SET_CONTEXT_TYPE(&attributes, WORKITEM_CONTEXT);
attributes.ParentObject = devContext->Device;

WDF_WORKITEM_CONFIG_INIT(&workitemConfig, ReadWriteWorkItem);

status = WdfWorkItemCreate( &workitemConfig,
&attributes,
&hWorkItem);

if (!NT_SUCCESS(status))
{
DebugPrint(("Failed to create work item %x\n", status));
return status;
}

context = GetWorkItemContext(hWorkItem);

context->DevContext = devContext;

//
// Execute this work item.
//
WdfWorkItemEnqueue(hWorkItem);

return STATUS_SUCCESS;
}

NTSTATUS
DpxMttGetCalibrationState(
IN PDEVICE_EXTENSION devContext
)
{
NTSTATUS status = STATUS_SUCCESS;
WDF_MEMORY_DESCRIPTOR memDesc;
WDF_USB_CONTROL_SETUP_PACKET controlSetupPacket;
ULONG bytesTransferred = 0;
UCHAR calibrationState;

WDF_USB_CONTROL_SETUP_PACKET_INIT_VENDOR(&controlSetupPacket,
BmRequestDeviceToHost,
BmRequestToDevice,
0x03,
0,
0);

WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&memDesc,
&calibrationState,
sizeof(UCHAR));

status = WdfUsbTargetDeviceSendControlTransferSynchronously(
devContext->UsbDevice,
NULL, // Optional WDFREQUEST
NULL, //
PWDF_REQUEST_SEND_OPTIONS
&controlSetupPacket,
&memDesc,
&bytesTransferred
);

if (status==STATUS_SUCCESS)
{
if (calibrationState==1)
devContext->Context.State.Calibrated = 1;
else
devContext->Context.State.Calibrated = 0;
}
else
{
devContext->Context.State.Calibrated = 0;
}

return status;
}

VOID
DpxMttFrameArrivalEvtTimerFunction(
IN WDFTIMER Timer
)
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_EXTENSION devContext =
GetDeviceContext(WdfTimerGetParentObject(Timer));

//
// Check is the device is calibrated
//

UCHAR CalibrationState;

if (devContext->Context.State.Calibrated==0)
{
QueuePassiveLevelCallback(devContext);
}

}

From: sinosoidal on 30 Dec 2009 07:59

From: sinosoidal on 30 Dec 2009 11:27

Hi Don,

I have another problem now.

I now have a work item and i passed to the work item context a pointer to my
device context in which i have the pointer to wdfusbdevice.

The problem is that by the time I try to assign the devContext to my work
item context, the wdfusbdevice pointer is null and inside the callback is
also null and then I cant make call the usb control transfer function.

How do I sort this out?

In my last 3 repeated posts i have the code which i'm using now...

Any tips?

Thanks,

Nuno

"Don Burn" wrote:

> You are issuing a call that can only be used at PASSIVE_LEVEL at
> DISPATCH_LEVEL. The EvtTimerFunc is a DPC routine that runs at
> DISPATCH_LEVEL. Use a WDF work item from the EvtTimerFunc to get a
> function running at PASSIVE.
>
>
> --
> Don Burn (MVP, Windows DKD)
> Windows Filesystem and Driver Consulting
> Website: http://www.windrvr.com
> Blog: http://msmvps.com/blogs/WinDrvr
> Remove StopSpam to reply
>
>
>
> "sinosoidal" <sinosoidal(a)discussions.microsoft.com> wrote in message
> news:A709505F-3663-4800-8279-B5154C2E8037(a)microsoft.com...
> > Hi,
> >
> > I'm trying to make the following in a timer callback:
> >
> > VOID
> > DpxMttCalibrationStateEvtTimerFunction(
> > IN WDFTIMER Timer
> > )
> > {
> > NTSTATUS status = STATUS_SUCCESS;
> > PDEVICE_EXTENSION devContext =
> > GetDeviceContext(WdfTimerGetParentObject(Timer));
> >
> > UCHAR CalibrationState;
> >
> > status = DpxMttGetCalibrationState(devContext,&CalibrationState);
> >
> > if (status==STATUS_SUCCESS)
> > {
> > if (devContext->Context.State.Calibrated==0)
> > {
> > if (CalibrationState==1)
> > devContext->Context.State.Calibrated = 1;
> > else
> > devContext->Context.State.Calibrated = 0;
> > }
> > }
> > else
> > {
> > devContext->Context.State.Calibrated = 0;
> > }
> > }
> >
> >
> > where
> >
> > NTSTATUS
> > DpxMttGetCalibrationState(
> > IN PDEVICE_EXTENSION devContext,
> > OUT PUCHAR CalibrationState
> > )
> > {
> > NTSTATUS status = STATUS_SUCCESS;
> > WDF_MEMORY_DESCRIPTOR memDesc;
> > WDF_USB_CONTROL_SETUP_PACKET controlSetupPacket;
> > ULONG bytesTransferred = 0;
> >
> > WDF_USB_CONTROL_SETUP_PACKET_INIT_VENDOR(&controlSetupPacket,
> > BmRequestDeviceToHost,
> > BmRequestToDevice,
> > 0x03,
> > 0,
> > 0);
> >
> > WDF_MEMORY_DESCRIPTOR_INIT_BUFFER(&memDesc,
> > CalibrationState,
> > sizeof(UCHAR));
> >
> > status = WdfUsbTargetDeviceSendControlTransferSynchronously(
> > devContext->UsbDevice,
> > NULL, // Optional
> > WDFREQUEST
> > NULL, //
> > PWDF_REQUEST_SEND_OPTIONS
> > &controlSetupPacket,
> > &memDesc,
> > &bytesTransferred
> > );
> >
> > return status;
> > }
> >
> > But this always results in a blue screen! why?
> >
> > The same happens when I put it on the usb frame arrival callback.
> >
> > The only place it worked in know was in device io control events handler.
> >
> > I need to do this inside the kernel without being triggered from outside.
> >
> > Any tips?
> >
> > thanks,
> >
> > Nuno
> >
> > __________ Information from ESET NOD32 Antivirus, version of virus
> > signature database 4725 (20091229) __________
> >
> > The message was checked by ESET NOD32 Antivirus.
> >
> > http://www.eset.com
> >
> >
> >
>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus signature database 4725 (20091229) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>
>
> .
>

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