embeddedsw/XilinxProcessorIPLib/drivers/gpiops/src/xgpiops_hw.c

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/**
*
* @file xgpiops_hw.c
*
* This file contains low level GPIO functions.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -----------------------------------------------
* 1.02a hk   08/22/13 First Release
*
* </pre>
*
******************************************************************************/

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

#include "xgpiops_hw.h"
#include "xgpiops.h"

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

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

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

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

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


/*****************************************************************************/
/*
*
* This function resets the GPIO module by writing reset values to
* all registers
*
* @param	Base address of GPIO module
*
* @return	None
*
* @note		None.
*
******************************************************************************/
void XGpioPs_ResetHw(u32 BaseAddress)
{
	u32 BankCount;

	/*
	 * Write reset values to all mask data registers
	 */
	for(BankCount = 2U; BankCount < (u32)XGPIOPS_MAX_BANKS; BankCount++) {

		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_DATA_MASK_OFFSET) +
				 XGPIOPS_DATA_LSW_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_DATA_MASK_OFFSET) +
				 XGPIOPS_DATA_MSW_OFFSET), 0x0U);
	}
	/*
	 * Write reset values to all output data registers
	 */
	for(BankCount = 2U; BankCount < (u32)XGPIOPS_MAX_BANKS; BankCount++) {

		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_DATA_BANK_OFFSET) +
				 XGPIOPS_DATA_OFFSET), 0x0U);
	}

	/*
	 * Reset all registers of all 4 banks
	 */
	for(BankCount = 0U; BankCount < (u32)XGPIOPS_MAX_BANKS; BankCount++) {

		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_DIRM_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_OUTEN_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTMASK_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTEN_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTDIS_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTSTS_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTPOL_OFFSET), 0x0U);
		XGpioPs_WriteReg(BaseAddress,
				((BankCount * XGPIOPS_REG_MASK_OFFSET) +
				 XGPIOPS_INTANY_OFFSET), 0x0U);
	}

	/*
	 * Bank 0 Int type
	 */
	XGpioPs_WriteReg(BaseAddress, XGPIOPS_INTTYPE_OFFSET,
			XGPIOPS_INTTYPE_BANK0_RESET);
	/*
	 * Bank 1 Int type
	 */
	XGpioPs_WriteReg(BaseAddress,
			((u32)XGPIOPS_REG_MASK_OFFSET + (u32)XGPIOPS_INTTYPE_OFFSET),
			XGPIOPS_INTTYPE_BANK1_RESET);
	/*
	 * Bank 2 Int type
	 */
	XGpioPs_WriteReg(BaseAddress,
			(((u32)2 * XGPIOPS_REG_MASK_OFFSET) + XGPIOPS_INTTYPE_OFFSET),
			XGPIOPS_INTTYPE_BANK2_RESET);
	/*
	 * Bank 3 Int type
	 */
	XGpioPs_WriteReg(BaseAddress,
			(((u32)3 * XGPIOPS_REG_MASK_OFFSET) + XGPIOPS_INTTYPE_OFFSET),
			XGPIOPS_INTTYPE_BANK3_RESET);

}