/*
 * Copyright (c) 2007-2008, Advanced Micro Devices, Inc.
 *               All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the
 *      distribution.
 *    * Neither the name of Advanced Micro Devices, Inc. nor the names
 *      of its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written
 *      permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Some portions copyright (c) 2010-2013 Xilinx, Inc.  All rights reserved.
 *
 * Xilinx, Inc.
 * XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
 * COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
 * ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR
 * STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION
 * IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE
 * FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
 * XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
 * THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO
 * ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE
 * FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 */

/* Standard includes. */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"

/* FreeRTOS+TCP includes. */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_Sockets.h"
#include "FreeRTOS_IP_Private.h"
#include "FreeRTOS_Routing.h"
#include "NetworkBufferManagement.h"

#include "Zynq/x_emacpsif.h"
#include "xparameters_ps.h"
#include "xparameters.h"

#define ETH0_PHY_ADDRESS    ( 1 ) /* Hardwired in WFI PCB */
#define ETH1_PHY_ADDRESS    ( 2 ) /* Hardwired in WFI PCB */
int phy_detected[ 2 ] = { ETH0_PHY_ADDRESS, ETH1_PHY_ADDRESS };


/* Advertisement control register. */
#define ADVERTISE_10HALF                       0x0020 /* Try for 10mbps half-duplex  */
#define ADVERTISE_10FULL                       0x0040 /* Try for 10mbps full-duplex  */
#define ADVERTISE_100HALF                      0x0080 /* Try for 100mbps half-duplex */
#define ADVERTISE_100FULL                      0x0100 /* Try for 100mbps full-duplex */

#define ADVERTISE_100_AND_10                 \
    ( ADVERTISE_10FULL | ADVERTISE_100FULL | \
      ADVERTISE_10HALF | ADVERTISE_100HALF )
#define ADVERTISE_100                          ( ADVERTISE_100FULL | ADVERTISE_100HALF )
#define ADVERTISE_10                           ( ADVERTISE_10FULL | ADVERTISE_10HALF )

#define ADVERTISE_1000                         0x0300


#define IEEE_CONTROL_REG_OFFSET                0
#define IEEE_STATUS_REG_OFFSET                 1
#define IEEE_AUTONEGO_ADVERTISE_REG            4
#define IEEE_PARTNER_ABILITIES_1_REG_OFFSET    5
#define IEEE_1000_ADVERTISE_REG_OFFSET         9
#define IEEE_PARTNER_ABILITIES_3_REG_OFFSET    10
#define IEEE_COPPER_SPECIFIC_CONTROL_REG       16
#define IEEE_SPECIFIC_STATUS_REG               17
#define IEEE_COPPER_SPECIFIC_STATUS_REG_2      19
#define IEEE_CONTROL_REG_MAC                   21
#define IEEE_PAGE_ADDRESS_REGISTER             22


#define IEEE_CTRL_1GBPS_LINKSPEED_MASK         0x2040
#define IEEE_CTRL_LINKSPEED_MASK               0x0040
#define IEEE_CTRL_LINKSPEED_1000M              0x0040
#define IEEE_CTRL_LINKSPEED_100M               0x2000
#define IEEE_CTRL_LINKSPEED_10M                0x0000
#define IEEE_CTRL_RESET_MASK                   0x8000
#define IEEE_CTRL_AUTONEGOTIATE_ENABLE         0x1000
#if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
    #define IEEE_CTRL_RESET                    0x9140
    #define IEEE_CTRL_ISOLATE_DISABLE          0xFBFF
#endif
#define IEEE_STAT_AUTONEGOTIATE_CAPABLE        0x0008
#define IEEE_STAT_AUTONEGOTIATE_COMPLETE       0x0020
#define IEEE_STAT_AUTONEGOTIATE_RESTART        0x0200
#define IEEE_STAT_1GBPS_EXTENSIONS             0x0100
#define IEEE_AN1_ABILITY_MASK                  0x1FE0
#define IEEE_AN3_ABILITY_MASK_1GBPS            0x0C00
#define IEEE_AN1_ABILITY_MASK_100MBPS          0x0380
#define IEEE_AN1_ABILITY_MASK_10MBPS           0x0060
#define IEEE_RGMII_TXRX_CLOCK_DELAYED_MASK     0x0030

#define IEEE_ASYMMETRIC_PAUSE_MASK             0x0800
#define IEEE_PAUSE_MASK                        0x0400
#define IEEE_AUTONEG_ERROR_MASK                0x8000

#define PHY_DETECT_REG                         1
#define PHY_DETECT_MASK                        0x1808

#define XEMACPS_GMII2RGMII_SPEED1000_FD        0x140
#define XEMACPS_GMII2RGMII_SPEED100_FD         0x2100
#define XEMACPS_GMII2RGMII_SPEED10_FD          0x100
#define XEMACPS_GMII2RGMII_REG_NUM             0x10

/* Frequency setting */
#define SLCR_LOCK_ADDR                         ( XPS_SYS_CTRL_BASEADDR + 0x4 )
#define SLCR_UNLOCK_ADDR                       ( XPS_SYS_CTRL_BASEADDR + 0x8 )
#define SLCR_GEM0_CLK_CTRL_ADDR                ( XPS_SYS_CTRL_BASEADDR + 0x140 )
#define SLCR_GEM1_CLK_CTRL_ADDR                ( XPS_SYS_CTRL_BASEADDR + 0x144 )
#ifdef PEEP
    #define SLCR_GEM_10M_CLK_CTRL_VALUE        0x00103031
    #define SLCR_GEM_100M_CLK_CTRL_VALUE       0x00103001
    #define SLCR_GEM_1G_CLK_CTRL_VALUE         0x00103011
#endif
#define SLCR_LOCK_KEY_VALUE                    0x767B
#define SLCR_UNLOCK_KEY_VALUE                  0xDF0D
#define SLCR_ADDR_GEM_RST_CTRL                 ( XPS_SYS_CTRL_BASEADDR + 0x214 )
#define EMACPS_SLCR_DIV_MASK                   0xFC0FC0FF

#define EMAC0_BASE_ADDRESS                     0xE000B000
#define EMAC1_BASE_ADDRESS                     0xE000C000

#define PHY_ADDRESS_COUNT                      32

#define MINIMUM_SLEEP_TIME                     2


static int detect_phy( XEmacPs * xemacpsp )
{
    u16 id_lower, id_upper;
    u32 phy_addr;

    for( phy_addr = 0; phy_addr < PHY_ADDRESS_COUNT; phy_addr++ )
    {
        XEmacPs_PhyRead( xemacpsp, phy_addr, PHY_DETECT_REG, &id_lower );

        if( ( id_lower != 0xFFFF ) &&
            ( ( id_lower & PHY_DETECT_MASK ) == PHY_DETECT_MASK ) )
        {
            /* Found a valid PHY address */
            FreeRTOS_printf( ( "XEmacPs detect_phy: PHY detected at address %d.\n", ( unsigned ) phy_addr ) );
            phy_detected[ xemacpsp->Config.DeviceId ] = phy_addr;
            return phy_addr;
        }
    }

    FreeRTOS_printf( ( "XEmacPs detect_phy: No PHY detected.  Assuming a PHY at address 0\n" ) );

    /* default to zero */
    return 0;
}

#ifdef PEEP
    unsigned get_IEEE_phy_speed( XEmacPs * xemacpsp )
    {
        u16 control;
        u16 status;
        u16 partner_capabilities;
        u16 partner_capabilities_1000;
        u16 phylinkspeed;
        u32 phy_addr = detect_phy( xemacpsp );

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET,
                          ADVERTISE_1000 );
        /* Advertise PHY speed of 100 and 10 Mbps */
        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG,
                          ADVERTISE_100_AND_10 );

        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET,
                         &control );
        control |= ( IEEE_CTRL_AUTONEGOTIATE_ENABLE |
                     IEEE_STAT_AUTONEGOTIATE_RESTART );

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, control );

        /* Read PHY control and status registers is successful. */
        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, &control );
        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET, &status );

        if( ( control & IEEE_CTRL_AUTONEGOTIATE_ENABLE ) && ( status &
                                                              IEEE_STAT_AUTONEGOTIATE_CAPABLE ) )
        {
            while( !( status & IEEE_STAT_AUTONEGOTIATE_COMPLETE ) )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET,
                                 &status );
            }

            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_PARTNER_ABILITIES_1_REG_OFFSET,
                             &partner_capabilities );

            if( status & IEEE_STAT_1GBPS_EXTENSIONS )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_PARTNER_ABILITIES_3_REG_OFFSET,
                                 &partner_capabilities_1000 );

                if( partner_capabilities_1000 & IEEE_AN3_ABILITY_MASK_1GBPS )
                {
                    return 1000;
                }
            }

            if( partner_capabilities & IEEE_AN1_ABILITY_MASK_100MBPS )
            {
                return 100;
            }

            if( partner_capabilities & IEEE_AN1_ABILITY_MASK_10MBPS )
            {
                return 10;
            }

            FreeRTOS_printf( ( "%s: unknown PHY link speed, setting TEMAC speed to be 10 Mbps\n",
                               __FUNCTION__ ) );
            return 10;
        }
        else
        {
            /* Update TEMAC speed accordingly */
            if( status & IEEE_STAT_1GBPS_EXTENSIONS )
            {
                /* Get commanded link speed */
                phylinkspeed = control & IEEE_CTRL_1GBPS_LINKSPEED_MASK;

                switch( phylinkspeed )
                {
                    case ( IEEE_CTRL_LINKSPEED_1000M ):
                        return 1000;

                    case ( IEEE_CTRL_LINKSPEED_100M ):
                        return 100;

                    case ( IEEE_CTRL_LINKSPEED_10M ):
                        return 10;

                    default:
                        FreeRTOS_printf( ( "%s: unknown PHY link speed (%d), setting TEMAC speed to be 10 Mbps\n",
                                           __FUNCTION__, phylinkspeed ) );
                        return 10;
                }
            }
            else
            {
                return ( control & IEEE_CTRL_LINKSPEED_MASK ) ? 100 : 10;
            }
        }
    }

#else /* Zynq */
    unsigned get_IEEE_phy_speed( XEmacPs * xemacpsp )
    {
        u16 temp;
        u16 control;
        u16 status;
        u16 partner_capabilities;

        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
            u32 phy_addr = XPAR_PCSPMA_SGMII_PHYADDR;
        #else
            /* PHY addresses hardcoded ETH0=1 and ETH1=2. */
            u32 phy_addr = detect_phy( xemacpsp );
        #endif
        FreeRTOS_printf( ( "Start PHY autonegotiation \n" ) );

        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
        #else
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER, 2 );
            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC, &control );
            control |= IEEE_RGMII_TXRX_CLOCK_DELAYED_MASK;
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC, control );

            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER, 0 );

            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, &control );
            control |= IEEE_ASYMMETRIC_PAUSE_MASK;
            control |= IEEE_PAUSE_MASK;
            control |= ADVERTISE_100;
            control |= ADVERTISE_10;
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, control );

            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET,
                             &control );
            control |= ADVERTISE_1000;
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET,
                              control );

            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER, 0 );
            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG,
                             &control );
            control |= ( 7 << 12 ); /* max number of gigabit attempts */
            control |= ( 1 << 11 ); /* enable downshift */
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG,
                              control );
        #endif /* if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1 */
        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, &control );
        control |= IEEE_CTRL_AUTONEGOTIATE_ENABLE;
        control |= IEEE_STAT_AUTONEGOTIATE_RESTART;
        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
            control &= IEEE_CTRL_ISOLATE_DISABLE;
        #endif

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, control );


        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
        #else
            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, &control );
            control |= IEEE_CTRL_RESET_MASK;
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, control );

            while( 1 )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, &control );

                if( control & IEEE_CTRL_RESET_MASK )
                {
                    continue;
                }
                else
                {
                    break;
                }
            }
        #endif /* if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1 */
        FreeRTOS_printf( ( "Waiting for PHY to complete autonegotiation.\n" ) );

        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET, &status );

        while( !( status & IEEE_STAT_AUTONEGOTIATE_COMPLETE ) )
        {
            vTaskDelay( MINIMUM_SLEEP_TIME );
            #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
            #else
                XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_STATUS_REG_2,
                                 &temp );

                if( temp & IEEE_AUTONEG_ERROR_MASK )
                {
                    FreeRTOS_printf( ( "Auto negotiation error \n" ) );
                }
            #endif
            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET,
                             &status );
        }

        FreeRTOS_printf( ( "autonegotiation complete \n" ) );

        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
        #else
            XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_SPECIFIC_STATUS_REG, &partner_capabilities );
        #endif

        #if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1
            FreeRTOS_printf( ( "Waiting for Link to be up; Polling for SGMII core Reg \n" ) );
            XEmacPs_PhyRead( xemacpsp, phy_addr, 5, &temp );

            while( !( temp & 0x8000 ) )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, 5, &temp );
            }

            if( ( temp & 0x0C00 ) == 0x0800 )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, 0, &temp );
                return 1000;
            }
            else if( ( temp & 0x0C00 ) == 0x0400 )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, 0, &temp );
                return 100;
            }
            else if( ( temp & 0x0C00 ) == 0x0000 )
            {
                XEmacPs_PhyRead( xemacpsp, phy_addr, 0, &temp );
                return 10;
            }
            else
            {
                FreeRTOS_printf( ( "get_IEEE_phy_speed(): Invalid speed bit value, Deafulting to Speed = 10 Mbps\n" ) );
                XEmacPs_PhyRead( xemacpsp, phy_addr, 0, &temp );
                XEmacPs_PhyWrite( xemacpsp, phy_addr, 0, 0x0100 );
                return 10;
            }
        #else /* if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1 */
            if( ( ( partner_capabilities >> 14 ) & 3 ) == 2 ) /* 1000Mbps */
            {
                return 1000;
            }
            else if( ( ( partner_capabilities >> 14 ) & 3 ) == 1 ) /* 100Mbps */
            {
                return 100;
            }
            else /* 10Mbps */
            {
                return 10;
            }
        #endif /* if XPAR_GIGE_PCS_PMA_CORE_PRESENT == 1 */
    }
#endif /* Zynq */

unsigned configure_IEEE_phy_speed( XEmacPs * xemacpsp,
                                   unsigned speed )
{
    u16 control;
    u32 phy_addr;
    int i;

    for( i = 0; i < 2; i++ )
    {
        phy_addr = phy_detected[ i ]; /* Both PHYs are connected to ETH0 */

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER, 2 );
        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC, &control );
        control |= IEEE_RGMII_TXRX_CLOCK_DELAYED_MASK;
        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC, control );

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER, 0 );

        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, &control );
        control |= IEEE_ASYMMETRIC_PAUSE_MASK;
        control |= IEEE_PAUSE_MASK;
        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, control );

        XEmacPs_PhyRead( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, &control );
        control &= ~IEEE_CTRL_LINKSPEED_1000M;
        control &= ~IEEE_CTRL_LINKSPEED_100M;
        control &= ~IEEE_CTRL_LINKSPEED_10M;

        if( speed == 1000 )
        {
            control |= IEEE_CTRL_LINKSPEED_1000M;
        }

        else if( speed == 100 )
        {
            control |= IEEE_CTRL_LINKSPEED_100M;
            /* Dont advertise PHY speed of 1000 Mbps */
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET, 0 );
            /* Dont advertise PHY speed of 10 Mbps */
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG,
                              ADVERTISE_100 );
        }

        else if( speed == 10 )
        {
            control |= IEEE_CTRL_LINKSPEED_10M;
            /* Dont advertise PHY speed of 1000 Mbps */
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET,
                              0 );
            /* Dont advertise PHY speed of 100 Mbps */
            XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG,
                              ADVERTISE_10 );
        }

        XEmacPs_PhyWrite( xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET,
                          control | IEEE_CTRL_RESET_MASK );
        {
            volatile int wait;

            for( wait = 0; wait < 100000; wait++ )
            {
            }
        }
    }

    return 0;
}

static void SetUpSLCRDivisors( int mac_baseaddr,
                               int speed )
{
    volatile u32 slcrBaseAddress;

    #ifndef PEEP
        u32 SlcrDiv0;
        u32 SlcrDiv1 = 0;
        u32 SlcrTxClkCntrl;
    #endif

    *( volatile unsigned int * ) ( SLCR_UNLOCK_ADDR ) = SLCR_UNLOCK_KEY_VALUE;

    if( ( unsigned long ) mac_baseaddr == EMAC0_BASE_ADDRESS )
    {
        slcrBaseAddress = SLCR_GEM0_CLK_CTRL_ADDR;
    }
    else
    {
        slcrBaseAddress = SLCR_GEM1_CLK_CTRL_ADDR;
    }

    #ifdef PEEP
        if( speed == 1000 )
        {
            *( volatile unsigned int * ) ( slcrBaseAddress ) =
                SLCR_GEM_1G_CLK_CTRL_VALUE;
        }
        else if( speed == 100 )
        {
            *( volatile unsigned int * ) ( slcrBaseAddress ) =
                SLCR_GEM_100M_CLK_CTRL_VALUE;
        }
        else
        {
            *( volatile unsigned int * ) ( slcrBaseAddress ) =
                SLCR_GEM_10M_CLK_CTRL_VALUE;
        }
    #else /* ifdef PEEP */
        if( speed == 1000 )
        {
            if( ( unsigned long ) mac_baseaddr == EMAC0_BASE_ADDRESS )
            {
                #ifdef XPAR_PS7_ETHERNET_0_ENET_SLCR_1000MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_0_ENET_SLCR_1000MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_0_ENET_SLCR_1000MBPS_DIV1;
                #endif
            }
            else
            {
                #ifdef XPAR_PS7_ETHERNET_1_ENET_SLCR_1000MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_1_ENET_SLCR_1000MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_1_ENET_SLCR_1000MBPS_DIV1;
                #endif
            }
        }
        else if( speed == 100 )
        {
            if( ( unsigned long ) mac_baseaddr == EMAC0_BASE_ADDRESS )
            {
                #ifdef XPAR_PS7_ETHERNET_0_ENET_SLCR_100MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_0_ENET_SLCR_100MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_0_ENET_SLCR_100MBPS_DIV1;
                #endif
            }
            else
            {
                #ifdef XPAR_PS7_ETHERNET_1_ENET_SLCR_100MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_1_ENET_SLCR_100MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_1_ENET_SLCR_100MBPS_DIV1;
                #endif
            }
        }
        else
        {
            if( ( unsigned long ) mac_baseaddr == EMAC0_BASE_ADDRESS )
            {
                #ifdef XPAR_PS7_ETHERNET_0_ENET_SLCR_10MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_0_ENET_SLCR_10MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_0_ENET_SLCR_10MBPS_DIV1;
                #endif
            }
            else
            {
                #ifdef XPAR_PS7_ETHERNET_1_ENET_SLCR_10MBPS_DIV0
                    SlcrDiv0 = XPAR_PS7_ETHERNET_1_ENET_SLCR_10MBPS_DIV0;
                    SlcrDiv1 = XPAR_PS7_ETHERNET_1_ENET_SLCR_10MBPS_DIV1;
                #endif
            }
        }

        SlcrTxClkCntrl = *( volatile unsigned int * ) ( slcrBaseAddress );
        SlcrTxClkCntrl &= EMACPS_SLCR_DIV_MASK;
        SlcrTxClkCntrl |= ( SlcrDiv1 << 20 );
        SlcrTxClkCntrl |= ( SlcrDiv0 << 8 );
        *( volatile unsigned int * ) ( slcrBaseAddress ) = SlcrTxClkCntrl;
    #endif /* ifdef PEEP */
    *( volatile unsigned int * ) ( SLCR_LOCK_ADDR ) = SLCR_LOCK_KEY_VALUE;
}


unsigned link_speed;
unsigned Phy_Setup( XEmacPs * xemacpsp )
{
    unsigned long conv_present = 0;
    unsigned long convspeeddupsetting = 0;
    unsigned long convphyaddr = 0;

    #ifdef XPAR_GMII2RGMIICON_0N_ETH0_ADDR
        convphyaddr = XPAR_GMII2RGMIICON_0N_ETH0_ADDR;
        conv_present = 1;
    #else
        #ifdef XPAR_GMII2RGMIICON_0N_ETH1_ADDR
            convphyaddr = XPAR_GMII2RGMIICON_0N_ETH1_ADDR;
            conv_present = 1;
        #endif
    #endif

    #ifdef  ipconfigNIC_LINKSPEED_AUTODETECT
        link_speed = get_IEEE_phy_speed( xemacpsp );

        if( link_speed == 1000 )
        {
            SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 1000 );
            convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED1000_FD;
        }
        else if( link_speed == 100 )
        {
            SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 100 );
            convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED100_FD;
        }
        else
        {
            SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 10 );
            convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED10_FD;
        }
    #elif   defined( ipconfigNIC_LINKSPEED1000 )
        SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 1000 );
        link_speed = 1000;
        configure_IEEE_phy_speed( xemacpsp, link_speed );
        convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED1000_FD;
        vTaskDelay( MINIMUM_SLEEP_TIME );
    #elif   defined( ipconfigNIC_LINKSPEED100 )
        SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 100 );
        link_speed = 100;
        configure_IEEE_phy_speed( xemacpsp, link_speed );
        convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED100_FD;
        vTaskDelay( MINIMUM_SLEEP_TIME );
    #elif   defined( ipconfigNIC_LINKSPEED10 )
        SetUpSLCRDivisors( xemacpsp->Config.BaseAddress, 10 );
        link_speed = 10;
        configure_IEEE_phy_speed( xemacpsp, link_speed );
        convspeeddupsetting = XEMACPS_GMII2RGMII_SPEED10_FD;
        vTaskDelay( MINIMUM_SLEEP_TIME );
    #endif /* ifdef  ipconfigNIC_LINKSPEED_AUTODETECT */

    if( conv_present )
    {
        XEmacPs_PhyWrite( xemacpsp, convphyaddr,
                          XEMACPS_GMII2RGMII_REG_NUM, convspeeddupsetting );
    }

    FreeRTOS_printf( ( "link speed: %d\n", link_speed ) );
    return link_speed;
}
