Prev: WDM Screen Capture Driver
Next: [USB]Problem about IOCTL_INTERNAL_USB_CYCLE_PORT
From: polybear on 25 Feb 2005 01:10
I got you. the firmware should handle app restart the communication
protocal.

but i still want to know , if there is any way that client driver can reset
device?


"Doron Holan [MS]" <doronh(a)nospam.microsoft.com> ýýýgýýlýýsýD
:uVgJrpvGFHA.3628(a)TK2MSFTNGP15.phx.gbl...
> this cycle port IOCTL will actually cause your device to be surprise
> removed. that means that if an app has a handle open to your device, it
> will have to reopen the handle every time the machine comes back from low
> power.
>
> d
>
> --
> Please do not send e-mail directly to this alias. this alias is for
> newsgroup purposes only.
> This posting is provided "AS IS" with no warranties, and confers no
rights.
>
>
> "Alexander Grigoriev" <alegr(a)earthlink.net> wrote in message
> news:eR7J6ouGFHA.3068(a)tk2msftngp13.phx.gbl...
> > Windows usually reenumerates the bus after return from suspend. This
> > should involve a reset. Check it with USB analyzer.
> >
> > "polybear" <polybear(a)no-sp> wrote in message
> > news:e8UWzUmGFHA.3912(a)TK2MSFTNGP10.phx.gbl...
> >>
> >> When system resume from suspend power status, my device must be reset.
> >>
> >>
> >> Since there are no IRP_MN_WAIT_WAKE .
> >> (I guess that IRP_MN_WAIT_WAKE not been receipted because this device
is
> >> not
> >> a remote-wakeup supported device.)
> >>
> >> I call this cycle port function when the system power chang to working
> >> power
> >> status
> >> (in IRP_MN_SET_POWER).
> >>
> >>
==========================================================================
> >> NTSTATUS ntStatus, status = STATUS_SUCCESS;
> >> PIRP irp;
> >> KEVENT event;
> >> IO_STATUS_BLOCK ioStatus;
> >> // PIO_STACK_LOCATION nextStack;
> >> PDEVICE_EXTENSION deviceExtension;
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("enter BulkUsb_CyclePort\n"));
> >>
> >> deviceExtension = DeviceObject->DeviceExtension;
> >> KeInitializeEvent(&event, NotificationEvent, FALSE);
> >>
> >> irp = IoBuildDeviceIoControlRequest(
> >> IOCTL_INTERNAL_USB_CYCLE_PORT,
> >> deviceExtension->TopOfStackDeviceObject,
> >> NULL,
> >> 0,
> >> NULL,
> >> 0,
> >> TRUE, // internal ( use
> >> IRP_MJ_INTERNAL_DEVICE_CONTROL )
> >> &event,
> >> &ioStatus);
> >>
> >>
> >> // nextStack = IoGetNextIrpStackLocation(irp);
> >> // nextStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
> >> // nextStack->Parameters.DeviceIoControl.IoControlCode =
> >> // IOCTL_INTERNAL_USB_CYCLE_PORT;
> >>
> >> // BULKUSB_ASSERT(nextStack != NULL);
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("BulkUsb_CyclePort() calling
USBD
> >> reset port api\n"));
> >>
> >> ntStatus = IoCallDriver(deviceExtension->TopOfStackDeviceObject,
> >> irp);
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("BulkUsb_CyclePort() return
from
> >> IoCallDriver USBD %x\n", ntStatus));
> >>
> >> if (ntStatus == STATUS_PENDING) {
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("BulkUsb_CyclePort() Wait
for
> >> single object\n"));
> >>
> >> status = KeWaitForSingleObject(
> >> &event,
> >> Suspended,
> >> KernelMode,
> >> FALSE,
> >> NULL);
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("BulkUsb_CyclePort() Wait
for
> >> single object, returned %x\n", status));
> >>
> >> } else {
> >> ioStatus.Status = ntStatus;
> >> }
> >>
> >> //
> >> // USBD maps the error code for us
> >> //
> >> ntStatus = ioStatus.Status;
> >>
> >> BULKUSB_KdPrint( DBGLVL_DEFAULT,("Exit BulkUsb_CyclePort (%x)\n",
> >> ntStatus));
> >>
> >> return ntStatus;
> >>
> >>
==Result====================================================================
> >> ==============
> >>
> >> enter BulkUsb_CyclePort
> >> BulkUsb:
> >> BulkUsb_CyclePort() calling USBD reset port api
> >> BulkUsb:
> >> BulkUsb_CyclePort() return from IoCallDriver USBD c000000d
> >> BulkUsb:
> >> Exit BulkUsb_CyclePort (c000000d)
> >>
> >>
> >>
> >> "Leo Havmýller" <rtxleh(a)nospam.nospam> ýýýgýýlýýsýD
> >> :ODTpDqlGFHA.3912(a)TK2MSFTNGP10.phx.gbl...
> >>> > nextStack = IoGetNextIrpStackLocation(irp);
> >>> > nextStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
> >>>
> >>> These are not needed.
> >>>
> >>> > ntStatus =
> >>> > IoCallDriver(deviceExtension->TopOfStackDeviceObject,
> >>> > irp);
> >>>
> >>> What is the ntStatus returned?
> >>>
> >>> Leo Havmýller.
> >>>
> >>>
> >>
> >>
> >
> >
>
>


First  |  Prev  | 
Pages: 1 2 3
Prev: WDM Screen Capture Driver
Next: [USB]Problem about IOCTL_INTERNAL_USB_CYCLE_PORT