/*************************************************************************/ /*!
@File
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@License        Dual MIT/GPLv2

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*/ /**************************************************************************/

#include <linux/interrupt.h>

#include "pvr_debug.h"
#include "allocmem.h"
#include "interrupt_support.h"

typedef struct LISR_DATA_TAG
{
	IMG_UINT32	ui32IRQ;
	PFN_SYS_LISR	pfnLISR;
	void		*pvData;
} LISR_DATA;

static irqreturn_t SystemISRWrapper(int irq, void *dev_id)
{
	LISR_DATA *psLISRData = (LISR_DATA *)dev_id;

	PVR_UNREFERENCED_PARAMETER(irq);

	if (psLISRData)
	{
		if (psLISRData->pfnLISR(psLISRData->pvData))
		{
			return IRQ_HANDLED;
		}
	}
	else
	{
		PVR_DPF((PVR_DBG_ERROR, "%s: Missing interrupt data", __func__));
	}

	return IRQ_NONE;
}

PVRSRV_ERROR OSInstallSystemLISR(IMG_HANDLE *phLISR,
				 IMG_UINT32 ui32IRQ,
				 const IMG_CHAR *pszDevName,
				 PFN_SYS_LISR pfnLISR,
				 void *pvData,
				 IMG_UINT32 ui32Flags)
{
	LISR_DATA *psLISRData;
	unsigned long ulIRQFlags = 0;

	if (pfnLISR == NULL || pvData == NULL)
	{
		return PVRSRV_ERROR_INVALID_PARAMS;
	}

	if (ui32Flags & ~SYS_IRQ_FLAG_MASK)
	{
		return PVRSRV_ERROR_INVALID_PARAMS;
	}

	switch (ui32Flags & SYS_IRQ_FLAG_TRIGGER_MASK)
	{
		case SYS_IRQ_FLAG_TRIGGER_DEFAULT:
			break;
		case SYS_IRQ_FLAG_TRIGGER_LOW:
			ulIRQFlags |= IRQF_TRIGGER_LOW;
			break;
		case SYS_IRQ_FLAG_TRIGGER_HIGH:
			ulIRQFlags |= IRQF_TRIGGER_HIGH;
			break;
		default:
			return PVRSRV_ERROR_INVALID_PARAMS;
	}

	if (ui32Flags & SYS_IRQ_FLAG_SHARED)
	{
		ulIRQFlags |= IRQF_SHARED;
	}

	psLISRData = OSAllocMem(sizeof *psLISRData);
	if (psLISRData == NULL)
	{
		return PVRSRV_ERROR_OUT_OF_MEMORY;
	}

	psLISRData->ui32IRQ = ui32IRQ;
	psLISRData->pfnLISR = pfnLISR;
	psLISRData->pvData = pvData;

	if (request_irq(ui32IRQ, SystemISRWrapper, ulIRQFlags, pszDevName, psLISRData))
	{
		OSFreeMem(psLISRData);

		return PVRSRV_ERROR_UNABLE_TO_REGISTER_ISR_HANDLER;
	}

	*phLISR = (IMG_HANDLE)psLISRData;

	return PVRSRV_OK;
}

PVRSRV_ERROR OSUninstallSystemLISR(IMG_HANDLE hLISR)
{
	LISR_DATA *psLISRData = (LISR_DATA *)hLISR;

	if (psLISRData == NULL)
	{
		return PVRSRV_ERROR_INVALID_PARAMS;
	}

	free_irq(psLISRData->ui32IRQ, psLISRData);

	OSFreeMem(psLISRData);

	return PVRSRV_OK;
}