2023.03.15
TEST MEMO

　Enable crosspoints.
　　CPU → Retimer → SFP28 (CH-0), SFP28 → Retimer → CPU (CH-1) (CH-1) configuration.
　Link training and auto-negotiation are disabled for both link partners.
　
  FEC function is disabled for both link partners.
　
  Script set to Retimer (SFP28 has 2 ports)
　　⇒ The result is Link Up and communication is possible.


　Execution script
　　SFP28 #0
　　　./sfp28_retimer_setup_init.sh 0
　　　./sfp28_retimer_setup_cdr_bypass.sh 0
　　　./sfp28_retimer_setup_cdr_reset.sh 0
　　SFP28 #1
　　　./sfp28_retimer_setup_init.sh 1
　　　./sfp28_retimer_setup_cdr_bypass.sh 1
　　　./sfp28_retimer_setup_cdr_reset.sh 1

　Script Summary
　 sfp28_retimer_setup_init.sh
　　Reset All Channel Registers
　　Cross-Point Setup

　 sfp28_retimer_setup_cdr_bypass.sh
　　CH-0
　　　Adapt Mode = 0
　　　CDR Bypass, Pre-LOCK = Raw Data, Post-LOCK = Raw Data
　　　CTLE Boost = 0
　　　EQ gain to 1
　　　VGA Gain to 1
　　CH-1
　　　Adapt Mode = 0
　　　CDR Bypass, Pre-LOCK = Mute, Post-LOCK = Retimed data
　　　CTLE Boost = 0
　　　EQ gain to 1
　　　VGA Gain to 1

　 sfp28_retimer_setup_cdr_reset.sh
　　Assert CDR Reset
　　1 sec wait
　　Release CDR Reset