#/bin/bash
#
# SFP28(25GbE) Retimer(DS250DF230) Setup(I2C) Init
#

# check paramter
    if [ $# -ne 1 ]; then
        echo "Usage: sfp28_retimer_setup_init [port]"
        echo "                                [port] --> (0:SFP28_0, 1:SFP28_1) $1 "
        exit 1
    fi

# command tmp
    CMD_RT='/tmp/.ess_cmd_rt'


# **************************************************************************************************
    sfp28_port=$1


# **************************************************************************************************
# 25G Retimer I2C Address
# **************************************************************************************************
# i2c-15  i2c  i2c-1-mux (chan_id 2)  I2C adapter  I2C3_CH2  25G Retimer #1
# i2c-16  i2c  i2c-1-mux (chan_id 3)  I2C adapter  I2C3_CH3  25G Retimer #2

# Retimer I2C Address 0x18

    if [ $sfp28_port -eq 0 ]; then
        I2C_ADR="15"
#       echo " *** 25G Retimer 0 Setup Init *** "
    fi
    if [ $sfp28_port -eq 1 ]; then
        I2C_ADR="16"
#       echo " *** 25G Retimer 1 Setup Init *** "
    fi


# **************************************************************************************************

    echo " *** 25G Retimer Setup Init Start *** "

# **************************************************************************************************

# **********************************************************
# Device ID
# **********************************************************
# ------------------------------------------------------
# Read the Device ID
# ------------------------------------------------------

    i2cget -f -y $I2C_ADR 0x18 0xF1 > $CMD_RT           # Device ID DS250DF230: 0x15
    DATA_TMP="$(cat $CMD_RT)"
    echo " Device ID : $DATA_TMP"


# **********************************************************
# Reset Channel Registers
# **********************************************************
# ------------------------------------------------------
# Reset All Channel Registers
# ------------------------------------------------------

    echo " Reset All Channel Registers"

    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFC 0x01        # Select channel 0
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x03        # Select broadcast mode

    i2cset -f -y -m 0x04 $I2C_ADR 0x18 0x00 0x04        # Assert channel register reset.
                                                        # This bit is self-clearing.

    i2cset -f -y -m 0xFF $I2C_ADR 0x18 0xFC 0x00        # Select channel X
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x00        # Select shared mode

    sleep 0.5


# **********************************************************
# Configure Cross-Point
# **********************************************************
# ------------------------------------------------------
# Configure Cross-Point CH0
# ------------------------------------------------------

    echo " Configure Cross-Point CH0"

    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFC 0x01        # Select channel 0
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x01        # Select channel mode

    i2cset -f -y -m 0x08 $I2C_ADR 0x18 0x95 0x08        # Set eq_enable to 1
    i2cset -f -y -m 0x08 $I2C_ADR 0x18 0x96 0x00        # Set EQ en_local to 0
    i2cset -f -y -m 0x04 $I2C_ADR 0x18 0x96 0x04        # Set EQ en_fanout to 1
    i2cset -f -y -m 0x01 $I2C_ADR 0x18 0x96 0x00        # Set EQ xpnt_slave to 0
    i2cset -f -y -m 0x02 $I2C_ADR 0x18 0x96 0x02        # Set EQ sel_xpt to 1
    i2cset -f -y -m 0x01 $I2C_ADR 0x18 0x96 0x00        # Set EQ xpnt_slave to 0
    i2cset -f -y -m 0x0C $I2C_ADR 0x18 0x0A 0x0C        # Force CDR Reset
    i2cset -f -y -m 0x0C $I2C_ADR 0x18 0x0A 0x00        # Release CDR Reset

    i2cset -f -y -m 0xFF $I2C_ADR 0x18 0xFC 0x00        # Select channel X
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x00        # Select shared mode


# ------------------------------------------------------
# Configure Cross-Point CH1
# ------------------------------------------------------

    echo " Configure Cross-Point CH1"

    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFC 0x02        # Select channel 1
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x01        # Select channel mode

    i2cset -f -y -m 0x08 $I2C_ADR 0x18 0x95 0x08        # Set eq_enable to 1
    i2cset -f -y -m 0x08 $I2C_ADR 0x18 0x96 0x00        # Set EQ en_local to 0
    i2cset -f -y -m 0x04 $I2C_ADR 0x18 0x96 0x04        # Set EQ en_fanout to 1
    i2cset -f -y -m 0x01 $I2C_ADR 0x18 0x96 0x00        # Set EQ xpnt_slave to 0
    i2cset -f -y -m 0x02 $I2C_ADR 0x18 0x96 0x02        # Set EQ sel_xpt to 1
    i2cset -f -y -m 0x01 $I2C_ADR 0x18 0x96 0x00        # Set EQ xpnt_slave to 0
    i2cset -f -y -m 0x0C $I2C_ADR 0x18 0x0A 0x0C        # Force CDR Reset
    i2cset -f -y -m 0x0C $I2C_ADR 0x18 0x0A 0x00        # Release CDR Reset

    i2cset -f -y -m 0xFF $I2C_ADR 0x18 0xFC 0x00        # Select channel X
    i2cset -f -y -m 0x03 $I2C_ADR 0x18 0xFF 0x00        # Select shared mode

    sleep 1

# **************************************************************************************************

    echo " *** 25G Retimer Setup Init END *** "

# **************************************************************************************************


exit 0