From 4dcccc83656cfe98af93ef47e6fbc269f16c900d Mon Sep 17 00:00:00 2001 From: Kane Chen Date: Wed, 23 Sep 2020 11:18:06 +0800 Subject: [PATCH] mb/google/zork: Modify USB 2.0 PHY parameters for Woomax Modify USB 2.0 PHY parameters for improve usb eye diagram. 1. USB 2.0 TypeC port0: .com_pds_tune = 0x03, .sq_rx_tune = 0x3, .tx_fsls_tune = 0x3, .tx_pre_emp_amp_tune = 0x03, .tx_pre_emp_pulse_tune = 0x0, .tx_rise_tune = 0x1, .rx_vref_tune = 0xf, .tx_hsxv_tune = 0x3, .tx_res_tune = 0x01, 2. USB 2.0 TypeC port3: .com_pds_tune = 0x03, .sq_rx_tune = 0x3, .tx_fsls_tune = 0x3, .tx_pre_emp_amp_tune = 0x03, .tx_pre_emp_pulse_tune = 0x0, .tx_rise_tune = 0x1, .rx_vref_tune = 0xf, .tx_hsxv_tune = 0x3, .tx_res_tune = 0x01, BUG=b:169207729 BRANCH=zork TEST=emerge-zork coreboot chromeos-bootimage Signed-off-by: Kane Chen Change-Id: I764238485a1a81eb0d4740ac58c80a43f965f550 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45641 Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) --- .../zork/variants/woomax/overridetree.cb | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/src/mainboard/google/zork/variants/woomax/overridetree.cb b/src/mainboard/google/zork/variants/woomax/overridetree.cb index de39891cc1..d1c5507feb 100644 --- a/src/mainboard/google/zork/variants/woomax/overridetree.cb +++ b/src/mainboard/google/zork/variants/woomax/overridetree.cb @@ -22,6 +22,30 @@ chip soc/amd/picasso register "telemetry_vddcr_soc_offset" = "0" # End : OPN Performance Configuration + #USB 2.0 strength + register "usb_2_port_tune_params[0]" = "{ + .com_pds_tune = 0x03, + .sq_rx_tune = 0x3, + .tx_fsls_tune = 0x3, + .tx_pre_emp_amp_tune = 0x03, + .tx_pre_emp_pulse_tune = 0x0, + .tx_rise_tune = 0x1, + .rx_vref_tune = 0xf, + .tx_hsxv_tune = 0x3, + .tx_res_tune = 0x01, + }" + + register "usb_2_port_tune_params[3]" = "{ + .com_pds_tune = 0x03, + .sq_rx_tune = 0x3, + .tx_fsls_tune = 0x3, + .tx_pre_emp_amp_tune = 0x03, + .tx_pre_emp_pulse_tune = 0x0, + .tx_rise_tune = 0x1, + .rx_vref_tune = 0xf, + .tx_hsxv_tune = 0x3, + .tx_res_tune = 0x01, + }" # USB OC pin mapping register "usb_port_overcurrent_pin[2]" = "USB_OC_NONE" # NC