/*++ Copyright (c) 1995 Microsoft Corporation Module Name: ioctl.c Abstract: Device driver for USB printers Environment: kernel mode only Notes: THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. Copyright (c) 1996 Microsoft Corporation. All Rights Reserved. Revision History: 5-4-96 : created --*/ #define DRIVER #include "wdm.h" #include "stdarg.h" #include "stdio.h" #include #include #include "usbdlib.h" #include "usbprint.h" #include "ioctl.h" #include "usbdlib.h" #include "ntddpar.h" int USBPRINT_GetLptStatus(IN PDEVICE_OBJECT DeviceObject); NTSTATUS HPUsbIOCTLVendorSetCommand(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp); NTSTATUS HPUsbIOCTLVendorGetCommand(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp); NTSTATUS HPUsbVendorSetCommand(IN PDEVICE_OBJECT DeviceObject,IN PUCHAR buffer,IN ULONG length); NTSTATUS HPUsbVendorGetCommand(IN PDEVICE_OBJECT DeviceObject,IN PUCHAR buffer,IN ULONG length,OUT PULONG pBytesRead); NTSTATUS USBPRINT_SoftReset(IN PDEVICE_OBJECT DeviceObject) /*++ Routine Description: Issues the class specific "Soft reset" command to the printer Arguments: DeviceObject - pointer to the device object for this instance of the printer device. Return Value: ntStatus of the URB --*/ { NTSTATUS ntStatus; PURB urb; PUSB_CONFIGURATION_DESCRIPTOR configurationDescriptor = NULL; PDEVICE_EXTENSION deviceExtension; LARGE_INTEGER timeOut; USBPRINT_KdPrint2 (("'USBPRINT.SYS: enter USBPRINT_SoftReset\n")); deviceExtension = DeviceObject->DeviceExtension; urb = ExAllocatePoolWithTag(NonPagedPool,sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), USBP_TAG); if (urb) { UsbBuildVendorRequest(urb, //urb URB_FUNCTION_CLASS_INTERFACE, //request target sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), //request len USBD_TRANSFER_DIRECTION_OUT|USBD_SHORT_TRANSFER_OK, //flags 0, //reserved bits 2, //request code 0, //wValue deviceExtension->Interface->InterfaceNumber<<8, //wIndex NULL, //return buffer address NULL, //mdl 0, //return length NULL); //link param timeOut.QuadPart = FAILURE_TIMEOUT; ntStatus = USBPRINT_CallUSBD(DeviceObject, urb, &timeOut); USBPRINT_KdPrint3 (("'USBPRINT.SYS: urb->Hdr.Status=%d\n",((struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST *)urb)->Hdr.Status)); if (NT_SUCCESS(ntStatus) && urb->UrbControlVendorClassRequest.TransferBufferLength > 2) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: CallUSBD succeeded\n")); } else { USBPRINT_KdPrint1(("'USBPRINT.SYS: Error; CallUSBD failed")); } ExFreePool(urb); } /*end if URB OK*/ else { USBPRINT_KdPrint1(("'USBPRINT.SYS: Error; urb allocation failed")); ntStatus=STATUS_NO_MEMORY; } return ntStatus; } /*end function Get1284_Id*/ int USBPRINT_Get1284Id(IN PDEVICE_OBJECT DeviceObject,PVOID pIoBuffer,int iLen) /*++ Routine Description: Requests and returns Printer 1284 Device ID Arguments: DeviceObject - pointer to the device object for this instance of the printer device. pIoBuffer - pointer to IO buffer from user mode iLen - Length of *pIoBuffer; Return Value: Success: Length of data written to *pIoBuffer (icluding lenght field in first two bytes of data) Failure: -1 --*/ { NTSTATUS ntStatus; PURB urb; ULONG siz; int iReturn = -1; PUSB_CONFIGURATION_DESCRIPTOR configurationDescriptor = NULL; PDEVICE_EXTENSION deviceExtension; LARGE_INTEGER timeOut; USBPRINT_KdPrint2 (("'USBPRINT.SYS: enter USBPRINT_Get1284\n")); deviceExtension = DeviceObject->DeviceExtension; urb = ExAllocatePoolWithTag(NonPagedPool,sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), USBP_TAG); if (urb) { siz = iLen; UsbBuildVendorRequest(urb, //urb URB_FUNCTION_CLASS_INTERFACE, //request target sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), //request len USBD_TRANSFER_DIRECTION_IN|USBD_SHORT_TRANSFER_OK, //flags 0, //reserved bits 0, //request code 0, //wValue deviceExtension->Interface->InterfaceNumber<<8, //wIndex pIoBuffer, //return buffer address NULL, //mdl iLen, //return length NULL); //link param timeOut.QuadPart = FAILURE_TIMEOUT; ntStatus = USBPRINT_CallUSBD(DeviceObject, urb, &timeOut); USBPRINT_KdPrint3 (("'USBPRINT.SYS: urb->Hdr.Status=%d\n",((struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST *)urb)->Hdr.Status)); if (NT_SUCCESS(ntStatus) && urb->UrbControlVendorClassRequest.TransferBufferLength > 2) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: CallUSBD succeeded\n")); iReturn= *((unsigned char *)pIoBuffer); iReturn<<=8; iReturn+=*(((unsigned char *)pIoBuffer)+1); if ( iReturn > 0 && iReturn < iLen ) { *(((char *)pIoBuffer)+iReturn)='\0'; USBPRINT_KdPrint3 (("'USBPRINT.SYS: return size ==%d\n",iReturn)); } else { iReturn = -1; } } else { USBPRINT_KdPrint1(("'USBPRINT.SYS: Error; CallUSBD failed\n")); iReturn=-1; } ExFreePool(urb); } /*end if URB OK*/ else { USBPRINT_KdPrint1(("'USBPRINT.SYS: Error; urb allocation failed")); iReturn=-1; } return iReturn; } /*end function Get1284_Id*/ int USBPRINT_GetLptStatus(IN PDEVICE_OBJECT DeviceObject) /*++ Routine Description: Requests and returns Printer status byte from USB printer Arguments: DeviceObject - pointer to the device object for this instance of the printer device. Return Value: Success: status value 0-255 Failure: -1 --*/ { NTSTATUS ntStatus; PURB urb; ULONG siz; unsigned char RETURN_BUFF[1]; PUSB_CONFIGURATION_DESCRIPTOR configurationDescriptor = NULL; PDEVICE_EXTENSION deviceExtension; LARGE_INTEGER timeOut; RETURN_BUFF[0] = 0; timeOut.QuadPart = FAILURE_TIMEOUT; deviceExtension = DeviceObject->DeviceExtension; urb = ExAllocatePoolWithTag(NonPagedPool,sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), USBP_TAG); if (urb) { siz = sizeof(RETURN_BUFF); UsbBuildVendorRequest(urb, URB_FUNCTION_CLASS_INTERFACE, sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), USBD_TRANSFER_DIRECTION_IN|USBD_SHORT_TRANSFER_OK, 0, //reserved bits 1, //request code 0, deviceExtension->Interface->InterfaceNumber, RETURN_BUFF, //return buffer address NULL, //mdl sizeof(RETURN_BUFF), //return length NULL); //link param ntStatus = USBPRINT_CallUSBD(DeviceObject, urb, &timeOut); USBPRINT_KdPrint3 (("'USBPRINT.SYS: urb->Hdr.Status=%d\n",((struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST *)urb)->Hdr.Status)); ExFreePool(urb); if (NT_SUCCESS(ntStatus)) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: CallUSBD succeeded\n")); return (int) RETURN_BUFF[0]; } else { USBPRINT_KdPrint1(("'USBPRINT.SYS: Error; CallUSBD failed")); return -1; } } /*end if URB OK*/ else { return -1; } } /*end function GetLptStatus*/ NTSTATUS USBPRINT_GetPortStatus( IN PDEVICE_OBJECT DeviceObject, IN PULONG PortStatus ) /*++ Routine Description: returns the port status for our device Arguments: Return Value: STATUS_SUCCESS if successful, STATUS_UNSUCCESSFUL otherwise --*/ { NTSTATUS ntStatus, status = STATUS_SUCCESS; PIRP irp; KEVENT event; IO_STATUS_BLOCK ioStatus; PIO_STACK_LOCATION nextStack; PDEVICE_EXTENSION deviceExtension; USBPRINT_KdPrint2 (("'USBPRINT.SYS: enter USBPRINT_GetPortStatus\n")); deviceExtension = DeviceObject->DeviceExtension; *PortStatus = 0; // // issue a synchronous request // KeInitializeEvent(&event, NotificationEvent, FALSE); irp = IoBuildDeviceIoControlRequest( IOCTL_INTERNAL_USB_GET_PORT_STATUS, deviceExtension->TopOfStackDeviceObject, NULL, 0, NULL, 0, TRUE, /* INTERNAL */ &event, &ioStatus); if(irp==NULL) { ioStatus.Status=STATUS_NO_MEMORY; goto GetPortStatusDone; } // // Call the class driver to perform the operation. If the returned status // is PENDING, wait for the request to complete. // nextStack = IoGetNextIrpStackLocation(irp); ASSERT(nextStack != NULL); nextStack->Parameters.Others.Argument1 = PortStatus; USBPRINT_KdPrint3 (("'USBPRINT.SYS: calling USBD port status api\n")); ntStatus = IoCallDriver(deviceExtension->TopOfStackDeviceObject, irp); USBPRINT_KdPrint3 (("'USBPRINT.SYS: return from IoCallDriver USBD (in getportstatus)%x\n", ntStatus)); if (ntStatus == STATUS_PENDING) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Wait for single object\n")); status = KeWaitForSingleObject( &event, Suspended, KernelMode, FALSE, NULL); USBPRINT_KdPrint3 (("'USBPRINT.SYS: Wait for single object, returned %x\n", status)); } else { ioStatus.Status = ntStatus; } if (!NT_SUCCESS(ntStatus)) { USBPRINT_KdPrint1 (("'USBPRINT.SYS: Error! IoCallDriver failed\n")); } else { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Success! IoCallDriver did not fail\n")); } USBPRINT_KdPrint3 (("'USBPRINT.SYS: Port status = %x\n", *PortStatus)); // // USBD maps the error code for us // GetPortStatusDone: ntStatus = ioStatus.Status; USBPRINT_KdPrint3 (("'USBPRINT.SYS: USBPRINT_GetPortStatus (%x)\n", ntStatus)); return ntStatus; } NTSTATUS USBPRINT_ResetParentPort( IN IN PDEVICE_OBJECT DeviceObject ) /*++ Routine Description: Reset the our parent port Arguments: Return Value: STATUS_SUCCESS if successful, STATUS_UNSUCCESSFUL otherwise --*/ { NTSTATUS ntStatus, status = STATUS_SUCCESS; PIRP irp; KEVENT event; IO_STATUS_BLOCK ioStatus; PIO_STACK_LOCATION nextStack; PDEVICE_EXTENSION deviceExtension; USBPRINT_KdPrint2 (("'USBPRINT.SYS: enter USBPRINT_ResetPort\n")); deviceExtension = DeviceObject->DeviceExtension; // // issue a synchronous request // KeInitializeEvent(&event, NotificationEvent, FALSE); irp = IoBuildDeviceIoControlRequest( IOCTL_INTERNAL_USB_RESET_PORT, deviceExtension->TopOfStackDeviceObject, NULL, 0, NULL, 0, TRUE, /* INTERNAL */ &event, &ioStatus); // // Call the class driver to perform the operation. If the returned status // is PENDING, wait for the request to complete. // if(irp==NULL) { ioStatus.Status=STATUS_NO_MEMORY; goto ResetPortDone; } nextStack = IoGetNextIrpStackLocation(irp); ASSERT(nextStack != NULL); USBPRINT_KdPrint3 (("'USBPRINT.SYS: calling USBD enable port api\n")); ntStatus = IoCallDriver(deviceExtension->TopOfStackDeviceObject, irp); USBPRINT_KdPrint3 (("'USBPRINT.SYS: return from IoCallDriver USBD (in reset parent port)%x\n", ntStatus)); if (ntStatus == STATUS_PENDING) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Wait for single object\n")); status = KeWaitForSingleObject( &event, Suspended, KernelMode, FALSE, NULL); USBPRINT_KdPrint3 (("'USBPRINT.SYS: Wait for single object, returned %x\n", status)); } else { ioStatus.Status = ntStatus; } // // USBD maps the error code for us // ResetPortDone: ntStatus = ioStatus.Status; USBPRINT_KdPrint3 (("'USBPRINT.SYS: USBPRINT_ResetPort (%x)\n", ntStatus)); return ntStatus; } NTSTATUS USBPRINT_ProcessIOCTL( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp ) /*++ Routine Description: Arguments: DeviceObject - pointer to the device object for this printer Return Value: NT status code --*/ { PIO_STACK_LOCATION irpStack; PVOID ioBuffer; ULONG inputBufferLength; ULONG outputBufferLength; PDEVICE_EXTENSION deviceExtension; ULONG ioControlCode; NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST; PUCHAR pch; USBPRINT_KdPrint2 (("'USBPRINT.SYS: IRP_MJ_DEVICE_CONTROL\n")); USBPRINT_IncrementIoCount(DeviceObject); // // Get a pointer to the current location in the Irp. This is where // the function codes and parameters are located. // deviceExtension = DeviceObject->DeviceExtension; if (deviceExtension->IsChildDevice == TRUE) { ntStatus = STATUS_NOT_SUPPORTED; Irp->IoStatus.Status = ntStatus; Irp->IoStatus.Information = 0; IoCompleteRequest (Irp,IO_NO_INCREMENT); USBPRINT_DecrementIoCount(DeviceObject); return ntStatus; } if (deviceExtension->AcceptingRequests == FALSE) { ntStatus = STATUS_DEVICE_DATA_ERROR; Irp->IoStatus.Status = ntStatus; Irp->IoStatus.Information = 0; IoCompleteRequest (Irp,IO_NO_INCREMENT); USBPRINT_DecrementIoCount(DeviceObject); return ntStatus; } irpStack = IoGetCurrentIrpStackLocation (Irp); Irp->IoStatus.Information = 0; ioBuffer = Irp->AssociatedIrp.SystemBuffer; inputBufferLength = irpStack->Parameters.DeviceIoControl.InputBufferLength; outputBufferLength = irpStack->Parameters.DeviceIoControl.OutputBufferLength; ioControlCode = irpStack->Parameters.DeviceIoControl.IoControlCode; // // Handle Ioctls from User mode // switch (ioControlCode) { case IOCTL_PAR_QUERY_DEVICE_ID: { int iReturn; char * pTempBuffer; USBPRINT_KdPrint1 (("'USBPRINT.SYS: Enter in PAR_QUERY_DEVICE_ID\n")); pTempBuffer=ExAllocatePool(NonPagedPool,outputBufferLength+3); //3 == 2 bytes for the size at the beginning, plus 1 for the null at the end if(pTempBuffer==NULL) { Irp->IoStatus.Information=0; ntStatus=STATUS_NO_MEMORY; } else { iReturn=USBPRINT_Get1284Id(DeviceObject,pTempBuffer,outputBufferLength+2); if(iReturn>0) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Success in PAR_QUERY_DEVICE_ID\n")); Irp->IoStatus.Information=iReturn-1; *(pTempBuffer+iReturn)='\0'; RtlCopyBytes(ioBuffer,pTempBuffer+2,iReturn-1); //+2 to step past the size bytes at the beginning, -1 is +1 for null -2 for size bytes ntStatus=STATUS_SUCCESS; } /*if success*/ else { USBPRINT_KdPrint1 (("'USBPRINT.SYS: Failure in PAR_QUERY_DEVICE_ID\n")); Irp->IoStatus.Information=0; ntStatus=STATUS_DEVICE_DATA_ERROR; } /*else failure*/ ExFreePool(pTempBuffer); } /*end else malloc OK*/ USBPRINT_KdPrint1 (("'USBPRINT.SYS: Exit in PAR_QUERY_DEVICE_ID\n")); } break; case IOCTL_USBPRINT_SOFT_RESET: ntStatus=USBPRINT_SoftReset(DeviceObject); Irp->IoStatus.Information=0; break; case IOCTL_USBPRINT_GET_1284_ID: { int iReturn; pch = (PUCHAR) ioBuffer; if(outputBufferLengthIoStatus.Information=0; ntStatus=STATUS_BUFFER_TOO_SMALL; } else { iReturn=USBPRINT_Get1284Id(DeviceObject,ioBuffer,outputBufferLength); if(iReturn>=0) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Success in GET_1284_ID\n")); *pch=(UCHAR)iReturn; Irp->IoStatus.Information=iReturn; ntStatus=STATUS_SUCCESS; } /*if success*/ else { USBPRINT_KdPrint1 (("'USBPRINT.SYS: Failure in GET_1284_ID\n")); Irp->IoStatus.Information=0; ntStatus=STATUS_DEVICE_DATA_ERROR; } /*else failure*/ } /*end else buffer len OK*/ } break; //end case GET_1284_ID case IOCTL_USBPRINT_GET_LPT_STATUS: { int iReturn; pch = (PUCHAR) ioBuffer; if(outputBufferLengthIoStatus.Information=0; ntStatus=STATUS_BUFFER_TOO_SMALL; } else { iReturn= USBPRINT_GetLptStatus(DeviceObject); if(iReturn>=0) { USBPRINT_KdPrint3 (("'USBPRINT.SYS: Success in GET_LPT_STATUS\n")); *pch=(UCHAR)iReturn; Irp->IoStatus.Information=1; ntStatus=STATUS_SUCCESS; } /*if success*/ else { USBPRINT_KdPrint1 (("'USBPRINT.SYS: Failure in GET_LPT_STATUS\n")); Irp->IoStatus.Information=0; ntStatus=STATUS_DEVICE_DATA_ERROR; } /*else failure*/ } /*end else buffer OK*/ } break; case IOCTL_USBPRINT_VENDOR_SET_COMMAND: ntStatus=HPUsbIOCTLVendorSetCommand(DeviceObject,Irp); break; case IOCTL_USBPRINT_VENDOR_GET_COMMAND: ntStatus=HPUsbIOCTLVendorGetCommand(DeviceObject,Irp); break; case IOCTL_USBPRINT_RESET_DEVICE: { ULONG portStatus; USBPRINT_KdPrint3 (("'USBPRINT.SYS: Reset Device Test\n")); TRAP(); // test this // // Check the port state, if it is disabled we will need // to re-enable it // ntStatus = USBPRINT_GetPortStatus(DeviceObject, &portStatus); if (NT_SUCCESS(ntStatus) && !(portStatus & USBD_PORT_ENABLED) &&portStatus & USBD_PORT_CONNECTED) { // // port is disabled, attempt reset // //USBPRINT_EnableParentPort(DeviceObject); USBPRINT_KdPrint2 (("'USBPRINT.SYS: Resetting port\n")); USBPRINT_ResetParentPort(DeviceObject); } } break; default: ntStatus = STATUS_INVALID_DEVICE_REQUEST; break; } Irp->IoStatus.Status = ntStatus; IoCompleteRequest (Irp, IO_NO_INCREMENT ); USBPRINT_DecrementIoCount(DeviceObject); return ntStatus; } /****************STUFF FROM HP:*************************/ /*------------------------------------------------------------------------------- * HPUsbIOCTLVendorSetCommand() - Send a vendor defined SET command *------------------------------------------------------------------------------- */ NTSTATUS HPUsbIOCTLVendorSetCommand(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp) { // Local Variables NTSTATUS ntStatus; PIO_STACK_LOCATION currentIrpStack; // Set up a local pointer to the Irp stack currentIrpStack = IoGetCurrentIrpStackLocation(Irp); // Send the SET command ntStatus = HPUsbVendorSetCommand(DeviceObject, (PUCHAR) Irp->AssociatedIrp.SystemBuffer, currentIrpStack->Parameters.DeviceIoControl.InputBufferLength); // Set the Irp information values Irp->IoStatus.Status = ntStatus; Irp->IoStatus.Information = 0; // Return return ntStatus; } /*------------------------------------------------------------------------------- * HPUsbIOCTLVendorGetCommand() - Send a vendor defined GET command *------------------------------------------------------------------------------- */ NTSTATUS HPUsbIOCTLVendorGetCommand(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp) { // Local Variables NTSTATUS ntStatus; PIO_STACK_LOCATION currentIrpStack; ULONG bytesRead = 0; // Set up a local pointer to the Irp stack currentIrpStack = IoGetCurrentIrpStackLocation(Irp); // Get the port status ntStatus = HPUsbVendorGetCommand(DeviceObject, (PUCHAR) Irp->AssociatedIrp.SystemBuffer, currentIrpStack->Parameters.DeviceIoControl.OutputBufferLength, &bytesRead); // Set the Irp information values Irp->IoStatus.Status = ntStatus; Irp->IoStatus.Information = bytesRead; // Return return ntStatus; } /*------------------------------------------------------------------------------- * HPUsbVendorSetCommand() - Send a vendor specified SET command * * Inputs: * buffer[0] - Vendor Request Code (bRequest function code) * buffer[1] - Vendor Request Value Most Significant Byte (wValue MSB) * buffer[2] - Vendor Request Value Least Significant Byte (wValue LSB) * buffer[3...] - Any data to be sent as part of the command * *------------------------------------------------------------------------------- */ NTSTATUS HPUsbVendorSetCommand(IN PDEVICE_OBJECT DeviceObject, IN PUCHAR buffer, IN ULONG length) { // Local variables NTSTATUS ntStatus; PDEVICE_EXTENSION deviceExtension; PUSBD_INTERFACE_INFORMATION interface; PURB urb; ULONG size; UCHAR bRequest; USHORT wValue; USHORT wIndex; if ( buffer == NULL || length < 3 ) return STATUS_INVALID_PARAMETER; // Set up a local pointer to the device extension deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension; // Set up a local pointer to the interface interface = deviceExtension->Interface; // Determine the size of the URB size = sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST); // Allocate memory for the USB Request Block (URB) // urb = (PURB) // ExAllocatePoolWithTag(NonPagedPool,size,HPUSB_ALLOC_TAG); urb = ExAllocatePoolWithTag(NonPagedPool,size, USBP_TAG); // Check for an error if (urb == NULL) return STATUS_NO_MEMORY; // Store the vendor request code bRequest = buffer[0]; // Store the vendor request parameter wValue = (buffer[1] << 8) | buffer[2]; // Create the wIndex value (Interface:Alternate) wIndex = (interface->InterfaceNumber << 8) | (interface->AlternateSetting); // Use a macro in the standard USB header files to build the URB UsbBuildVendorRequest(urb, URB_FUNCTION_VENDOR_INTERFACE, (USHORT) size, 0, 0, bRequest, wValue, wIndex, buffer, NULL, length, NULL); // // Timeout cancellation should happen from user mode // ntStatus = USBPRINT_CallUSBD(DeviceObject,urb, NULL); // Free allocated memory ExFreePool(urb); // Return Success return ntStatus; } /*------------------------------------------------------------------------------- * HPUsbVendorGetCommand() - Send a vendor specified GET command * * Inputs: * buffer[0] - Vendor Request Code (bRequest function code) * buffer[1] - Vendor Request Value Most Significant Byte (wValue MSB) * buffer[2] - Vendor Request Value Least Significant Byte (wValue LSB) * Outputs: * buffer[ ] - Response data * *------------------------------------------------------------------------------- */ NTSTATUS HPUsbVendorGetCommand(IN PDEVICE_OBJECT DeviceObject, IN PUCHAR buffer, IN ULONG length, OUT PULONG pBytesRead) { // Local variables NTSTATUS ntStatus; PDEVICE_EXTENSION deviceExtension; PUSBD_INTERFACE_INFORMATION interface; PURB urb; ULONG size; UCHAR bRequest; USHORT wValue; USHORT wIndex; if ( buffer == NULL || length < 3 ) return STATUS_INVALID_PARAMETER; // Initialize the pBytesRead return value *pBytesRead = 0; // Set up a local pointer to the device extension deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension; // Set up a local pointer to the interface interface = deviceExtension->Interface; // Determine the size of the URB size = sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST); // Allocate memory for the USB Request Block (URB) // urb = (PURB) // ExAllocatePoolWithTag(NonPagedPool,size,HPUSB_ALLOC_TAG); urb = ExAllocatePoolWithTag(NonPagedPool,size, USBP_TAG); // Check for an error if (urb == NULL) return STATUS_NO_MEMORY; // Store the vendor request code bRequest = buffer[0]; // Store the vendor request parameter wValue = (buffer[1] << 8) | buffer[2]; // Create the wIndex value (Interface:Alternate) wIndex = (interface->InterfaceNumber << 8) | (interface->AlternateSetting); // Use a macro in the standard USB header files to build the URB UsbBuildVendorRequest(urb, URB_FUNCTION_VENDOR_INTERFACE, (USHORT) size, USBD_TRANSFER_DIRECTION_IN | USBD_SHORT_TRANSFER_OK, 0, bRequest, wValue, wIndex, buffer, NULL, length, NULL); // // Timeout cancellation should happen from user mode // ntStatus = USBPRINT_CallUSBD(DeviceObject,urb, NULL); // Retrieve the number of bytes read if (NT_SUCCESS(ntStatus)) *pBytesRead = urb->UrbControlVendorClassRequest.TransferBufferLength; // Free allocated memory ExFreePool(urb); // Return Success return ntStatus; } /* // ----------------------------------------------------------- // Kernel Mode Usage // ----------------------------------------------------------- // Create the channel change request Buffer[0] = HP_VENDOR_COMMAND_DO_SOMETHING; Buffer[1] = HP_PARAMETER_UPPER_BYTE; Buffer[2] = HP_PARAMETER_LOWER_BYTE; // Send the request status = CallDeviceIoControl( m_pTargetDeviceObject, // the device to send the new irp to IOCTL_HPUSB_VENDOR_GET_COMMAND, // the ioctl to send to the driver , Buffer, // the input buffer for the ioctl 3, // the length of the input buffer Buffer, // the output buffer for the ioctl 1, // the length of the output buffer FALSE, // create the irp with IRP_MJ_DEVICE_CONTROL NULL); // use the provided completion routine */