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

# check paramter
    if [ $# -ne 1 ]; then
        echo "Usage: sfp28_retimer_setup_cdr_reset [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 *** "
    fi
    if [ $sfp28_port -eq 1 ]; then
        I2C_ADR="16"
#       echo " *** 25G Retimer 1 Setup *** "
    fi


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

    echo " *** 25G Retimer Setup CDR Reset Start *** "

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

# **********************************************************
# CDR Reset
# **********************************************************

    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

# ------------------------------------------------------
# Assert CDR Reset
# ------------------------------------------------------

    echo " Assert CDR Reset"

    i2cset -f -y -m 0x0C $I2C_ADR 0x18 0x0A 0x0C        # Assert CDR reset
    sleep 1

# ------------------------------------------------------
# Release CDR Reset
# ------------------------------------------------------

    echo " Release 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 5


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

    echo " *** 25G Retimer Setup CDR Reset END *** "

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


exit 0