embeddedsw/XilinxProcessorIPLib/drivers/cresample/src/xcresample_intr.c

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/*****************************************************************************/
/**
*
* @file xcresample_intr.c
*
* This file contains interrupt related functions of Chroma Resampler core
* Please see xcresample.h for more details of the core.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who     Date     Changes
* ----- ------- -------- ---------------------------------------------------
* 4.0   adk     03/12/14 First Release.
*                        Implemented XCresample_IntrHandler and
*                        XCresample_SetCallBack functions.
*
* </pre>
*
******************************************************************************/

/***************************** Include Files *********************************/

#include "xcresample.h"

/************************** Constant Definitions *****************************/


/***************** Macros (Inline Functions) Definitions *********************/


/**************************** Type Definitions *******************************/


/************************** Function Prototypes ******************************/


/************************** Variable Definitions *****************************/


/************************** Function Definitions *****************************/

/*****************************************************************************/
/**
*
* This function is the interrupt handler for the Chroma Resampler driver.
*
* This handler reads the pending interrupt from the STATUS register,
* determines the source of the interrupts and calls the respective
* callbacks for the interrupts that are enabled in IRQ_ENABLE register,
* and finally clears the interrupts.
*
* The application is responsible for connecting this function to the interrupt
* system. Application beyond this driver is also responsible for providing
* callbacks to	handle interrupts and installing the callbacks using
* Xcresample_SetCallBack() during initialization phase.
*
* @param	InstancePtr is a pointer to the XCresample instance that just
*		interrupted.
*
* @return	None.
*
* @note		Interrupt interface should be enabled.
*
******************************************************************************/
void XCresample_IntrHandler(void *InstancePtr)
{
	u32 PendingIntr;
	u32 ErrorStatus;
	XCresample *XCresamplePtr = NULL;
	XCresamplePtr = (XCresample *)((void *)InstancePtr);

	/* Verify Arguments. */
	Xil_AssertVoid(XCresamplePtr != NULL);
	Xil_AssertVoid(XCresamplePtr->IsReady ==
			(u32)(XIL_COMPONENT_IS_READY));
	Xil_AssertVoid(XCresamplePtr->Config.HasIntcIf != (u16)0x0);

	/* Get pending interrupts */
	PendingIntr = (u32)XCresample_IntrGetPending(XCresamplePtr);

	/* A Slave Error interrupt has happened */
	if (((PendingIntr) & (XCRE_IXR_SE_MASK)) ==
			 		(XCRE_IXR_SE_MASK)) {
		ErrorStatus = (PendingIntr) & ((u32)(XCRE_IXR_SE_MASK));
		XCresamplePtr->ErrCallBack(XCresamplePtr->ErrRef, ErrorStatus);
	}

	/* A processing start has happened */
	if (((PendingIntr) & (XCRE_IXR_PROCS_STARTED_MASK)) ==
					(XCRE_IXR_PROCS_STARTED_MASK)) {
		XCresamplePtr->ProcStartCallBack
				(XCresamplePtr->ProcStartRef);
	}

	/* A frame done interrupt has happened */
	if (((PendingIntr) & (XCRE_IXR_EOF_MASK)) ==
					(XCRE_IXR_EOF_MASK)) {
		XCresamplePtr->FrameDoneCallBack
				(XCresamplePtr->FrameDoneRef);
	}

	/* Clear pending interrupt(s) */
	XCresample_IntrClear(XCresamplePtr, PendingIntr);
}

/*****************************************************************************/
/**
*
* This routine installs an asynchronous callback function for the given
* HandlerType:
*
* <pre>
* HandlerType              Callback Function Type
* -----------------------  --------------------------------------------------
* XCRE_HANDLER_FRAMEDONE   FrameDoneCallBack
* XCRE_HANDLER_PROCSTART   ProcStartCallBack
* XCRE_HANDLER_ERROR       ErrCallBack
*
* </pre>
*
* @param	InstancePtr is a pointer to the XCresample instance to be
*		worked on.
* @param	HandlerType specifies which callback is to be attached.
* @param	CallBackFunc is the address of the callback function.
* @param	CallBackRef is a user data item that will be passed to the
*		callback function when it is invoked.
*
* @return
*		- XST_SUCCESS when handler is installed.
*		- XST_INVALID_PARAM when HandlerType is invalid.
*
* @note		Invoking this function for a handler that already has been
*		installed replaces it with the new handler.
*
******************************************************************************/
int XCresample_SetCallBack(XCresample *InstancePtr, u32 HandlerType,
				void *CallBackFunc, void *CallBackRef)
{
	int Status;

	/* Verify arguments. */
	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(InstancePtr->IsReady ==
				(u32)(XIL_COMPONENT_IS_READY));
	Xil_AssertNonvoid(CallBackFunc != NULL);
	Xil_AssertNonvoid(CallBackRef != NULL);
	Xil_AssertNonvoid((HandlerType >= XCRE_HANDLER_PROCSTART) &&
			(HandlerType <= XCRE_HANDLER_ERROR));

	/* Calls the respective call backs according to handler type */
	switch (HandlerType) {
		case XCRE_HANDLER_PROCSTART:
			InstancePtr->ProcStartCallBack =
				(XCresample_CallBack)((void *)CallBackFunc);
			InstancePtr->ProcStartRef = CallBackRef;
			Status = (XST_SUCCESS);
			break;

		case XCRE_HANDLER_FRAMEDONE:
			InstancePtr->FrameDoneCallBack =
				(XCresample_CallBack)((void *)CallBackFunc);
			InstancePtr->FrameDoneRef = CallBackRef;
			Status = (XST_SUCCESS);
			break;

		case XCRE_HANDLER_ERROR:
			InstancePtr->ErrCallBack =
			 (XCresample_ErrorCallBack)((void *)CallBackFunc);
			InstancePtr->ErrRef = CallBackRef;
			Status = (XST_SUCCESS);
			break;

		default:
			Status = (XST_INVALID_PARAM);
			break;

	}

	return Status;
}