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/*****************************************************************************/
/**
*
* @file xemacps_hw.c
* @addtogroup emacps_v3_7
* @{
*
* This file contains the implementation of the ethernet interface reset sequence
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -------------------------------------------------------
* 1.05a kpc 28/06/13 First release
* 3.00 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
* </pre>
*
******************************************************************************/
/***************************** Include Files *********************************/
#include "xemacps_hw.h"
#include "xparameters.h"
/************************** Constant Definitions *****************************/
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
/*****************************************************************************/
/**
* This function perform the reset sequence to the given emacps interface by
* configuring the appropriate control bits in the emacps specifc registers.
* the emacps reset squence involves the following steps
* Disable all the interuupts
* Clear the status registers
* Disable Rx and Tx engines
* Update the Tx and Rx descriptor queue registers with reset values
* Update the other relevant control registers with reset value
*
* @param BaseAddress of the interface
*
* @return N/A
*
* @note
* This function will not modify the slcr registers that are relavant for
* emacps controller
******************************************************************************/
void XEmacPs_ResetHw(u32 BaseAddr)
{
u32 RegVal;
/* Disable the interrupts */
XEmacPs_WriteReg(BaseAddr,XEMACPS_IDR_OFFSET,0x0U);
/* Stop transmission,disable loopback and Stop tx and Rx engines */
RegVal = XEmacPs_ReadReg(BaseAddr,XEMACPS_NWCTRL_OFFSET);
RegVal &= ~((u32)XEMACPS_NWCTRL_TXEN_MASK|
(u32)XEMACPS_NWCTRL_RXEN_MASK|
(u32)XEMACPS_NWCTRL_HALTTX_MASK|
(u32)XEMACPS_NWCTRL_LOOPEN_MASK);
/* Clear the statistic registers, flush the packets in DPRAM*/
RegVal |= (XEMACPS_NWCTRL_STATCLR_MASK|
XEMACPS_NWCTRL_FLUSH_DPRAM_MASK);
XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCTRL_OFFSET,RegVal);
/* Clear the interrupt status */
XEmacPs_WriteReg(BaseAddr,XEMACPS_ISR_OFFSET,XEMACPS_IXR_ALL_MASK);
/* Clear the tx status */
XEmacPs_WriteReg(BaseAddr,XEMACPS_TXSR_OFFSET,(XEMACPS_TXSR_ERROR_MASK|
(u32)XEMACPS_TXSR_TXCOMPL_MASK|
(u32)XEMACPS_TXSR_TXGO_MASK));
/* Clear the rx status */
XEmacPs_WriteReg(BaseAddr,XEMACPS_RXSR_OFFSET,
XEMACPS_RXSR_FRAMERX_MASK);
/* Clear the tx base address */
XEmacPs_WriteReg(BaseAddr,XEMACPS_TXQBASE_OFFSET,0x0U);
/* Clear the rx base address */
XEmacPs_WriteReg(BaseAddr,XEMACPS_RXQBASE_OFFSET,0x0U);
/* Update the network config register with reset value */
XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCFG_OFFSET,XEMACPS_NWCFG_RESET_MASK);
/* Update the hash address registers with reset value */
XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHL_OFFSET,0x0U);
XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHH_OFFSET,0x0U);
}
/** @} */