/**
 * File: gpiops_intr.c
 * Author: Theo Tsang <sihao.tsang@gmail.com>
 * Date: 2023-03-24 15:00
 * Description: omit
 *
 * Ver   Who  Date       Changes
 * ----- ---- ---------- -------------
 * 1.00  Theo 03/15/2024 First release
 */

#include "gpiops_intr.h"

XScuGic InstancePtr;

static void GpioPs_IntrHander_example(void *CallBackRef, u32 Bank, u32 Status)
{
	xil_printf("Data read from GPIO Interrupt Bank=0x%x, IO_bit=0x%x\r\n", Bank, Status);
}

/**
 * Set the handler and Enable the interrupt.
 *
 * @param	InstancePtr is a pointer to the XScuGic instance.
 * @param	GpioInstancePtr is omit.
 * @param	Int_Id contains the ID of the interrupt source and should be
 *		 	in the range of 0 to XSCUGIC_MAX_NUM_INTR_INPUTS - 1
 * 
 * @return      None.
 *
 * @note		None.
 *
 */
void GpioPs_Setup_Intr_System(XScuGic * InstancePtr, XGpioPs *GpioInstancePtr, u16 Int_Id)
{
	/* Set up the time Interrupt */
	XScuGic_Connect(InstancePtr, Int_Id, (Xil_ExceptionHandler)XGpioPs_IntrHandler, (void *)GpioInstancePtr);

	/* Set the handler for gpio interrupts */
	XGpioPs_SetCallbackHandler(GpioInstancePtr, (void *)GpioInstancePtr, GpioPs_IntrHander_example);

	/* Enable the interrupt for GPIO at GIC */
	XScuGic_Enable(InstancePtr, Int_Id);
}

/**
 * Set the global interrupt callback function and enable global 
 * interrupt.
 *
 * @param	InstancePtr is omit.
 * 
 * @return      None.
 *
 * @note		None.
 *
 */
void Setup_Intr_Exception(XScuGic * InstancePtr)
{
	/* Enable interrupts from the hardware */
	Xil_ExceptionInit();
	Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT, (Xil_ExceptionHandler)XScuGic_InterruptHandler, (void *)InstancePtr);
	Xil_ExceptionEnable();
}

/**
 * Initialize the interrupt controller driver.
 *
 * @param	InstancePtr is omit.
 * 
 * @return
 *		- XST_SUCCESS if initialization was successful
 *
 * @note		None.
 *
 */
s32 Init_Intr_System(XScuGic * InstancePtr)
{
	int status;

	XScuGic_Config * ConfigPtr;
	/**
	 * Initialize the interrupt controller driver so that it is ready to
	 * use.
	 */
	ConfigPtr = XScuGic_LookupConfig(INTR_DEVICE_ID);
	if (NULL == ConfigPtr) {
        return XST_FAILURE;
    }

    status = XScuGic_CfgInitialize(InstancePtr, ConfigPtr, ConfigPtr->CpuBaseAddress);
    if (status != XST_SUCCESS) {
        return XST_FAILURE;
    }

	return XST_SUCCESS;
}

void GpioPs_Intr_Init(XGpioPs *GpioInstancePtr)
{
	Init_Intr_System(&InstancePtr);

	GpioPs_Setup_Intr_System(&InstancePtr, GpioInstancePtr, GPIO_INTERRUPT_ID);

	Setup_Intr_Exception(&InstancePtr);
}