/*********************************************************************
 *
 *                 Ethernet Controller API 
 *
 *********************************************************************
 * FileName:        eth_mac_open_lib.c
 * Dependencies:
 * Processor:       PIC32
 *
 * Compiler:        MPLAB XC32
 *                  MPLAB IDE
 * Company:         Microchip Technology, Inc.
 *
 * Software License Agreement
 * Microchip Audio Library – PIC32 Software.
 * Copyright © 2008 Microchip Technology Inc.  All rights reserved.
 * 
 * Microchip licenses the Software for your use with Microchip microcontrollers
 * and Microchip digital signal controllers pursuant to the terms of the
 * Non-Exclusive Software License Agreement accompanying this Software.
 *
 * SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION,
 * ANY WARRANTY OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS
 * FOR A PARTICULAR PURPOSE.
 * MICROCHIP AND ITS LICENSORS ASSUME NO RESPONSIBILITY FOR THE ACCURACY,
 * RELIABILITY OR APPLICATION OF THE SOFTWARE AND DOCUMENTATION.
 * IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR OBLIGATED
 * UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH
 * OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
 * DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL,
 * SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS
 * OR LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY,
 * SERVICES, OR ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED
 * TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
 *
 *$Id: $
 ********************************************************************/

#include "_eth_include.h"


#ifdef _ETH	// the Ethernet device is present


/****************************************************************************
 * Function:        EthMACOpen
 *
 * PreCondition:    EthInit called!
 *
 * Input:           oFlags - open flags
 *                  pauseType - pause type to be supported by the MAC
 *
 * Output:          None  
 *
 * Side Effects:    None
 *
 * Overview:        This function performs the open and configuration of the Eth MAC.
 *                  It needs to be called after an EthInit() was called and the PHY initialized.
 *                  
 *
 * Note:            - If no auto-negotiation is performed, the EthMACOpen() could be called immediately after EthInit() and PHY initialization.
 *                  - Otherwise the open flags and the pause type should be the ones obtained as a result of the PHY negotiation procedure! 
 *****************************************************************************/
void EthMACOpen(eEthOpenFlags oFlags, eEthMacPauseType pauseType)
{
	unsigned int	cfg1;

	cfg1=_EMACxCFG1_RXENABLE_MASK|((oFlags&ETH_OPEN_MAC_LOOPBACK)?_EMACxCFG1_LOOPBACK_MASK:0);

	if(oFlags&ETH_OPEN_FDUPLEX)
	{
		if(pauseType&ETH_MAC_PAUSE_TYPE_EN_TX)
		{
			cfg1|=_EMACxCFG1_TXPAUSE_MASK;
		}	
		if(pauseType&ETH_MAC_PAUSE_TYPE_EN_RX)
		{
			cfg1|=_EMACxCFG1_RXPAUSE_MASK;
		}
	}	
	
	EMACxCFG1=cfg1;

	EMACxCFG2=_EMACxCFG2_EXCESSDFR_MASK|_EMACxCFG2_AUTOPAD_MASK|_EMACxCFG2_PADENABLE_MASK|_EMACxCFG2_CRCENABLE_MASK|
			((oFlags&ETH_OPEN_HUGE_PKTS)?_EMACxCFG2_HUGEFRM_MASK:0)|_EMACxCFG2_LENGTHCK_MASK|
			((oFlags&ETH_OPEN_HDUPLEX)?0:_EMACxCFG2_FULLDPLX_MASK);
		

	EMACxIPGT=(oFlags&ETH_OPEN_HDUPLEX)?0x12:0x15;
	EMACxIPGR=(0xc<<_EMACxIPGR_NB2BIPKTGP1_POSITION)|(0x12<<_EMACxIPGR_NB2BIPKTGP2_POSITION);
	EMACxCLRT=(0x37<<_EMACxCLRT_CWINDOW_POSITION)|(0xf<<_EMACxCLRT_RETX_POSITION);


	if(oFlags&ETH_OPEN_RMII)
	{
		EMACxSUPP=_EMACxSUPP_RESETRMII_MASK;	// reset the RMII module
		
		EMACxSUPP=(oFlags&ETH_OPEN_100)?_EMACxSUPP_SPEEDRMII_MASK:0;	// release the reset and configure RMII
	}
}

#endif	// _ETH