From 9cc148d8c50df689e6647132746026c3354a2700 Mon Sep 17 00:00:00 2001 From: Kevin Chiu Date: Sun, 18 Oct 2020 17:19:22 +0800 Subject: mb/google/zork: update USB 2.0 controller Lane Parameter for morphius Enhance USB 2.0 SI by increasing the level of "HS DC Voltage Level" and "Disconnect Threshold Adjustment". COMPDISTUNE0: 0x3->0x7 TXVREFTUNE0: 0x6->0xf BUG=b:162614573 BRANCH=zork TEST=1. emerge-zork coreboot 2. check U2 registers are set correctly 3. test with servo v4 type-c, it's working expectedly. 4. U2 SI pass Signed-off-by: Kevin Chiu Change-Id: I278cc0aaddbc9fce595bf57ca69ee8abfc9f5659 Reviewed-on: https://review.coreboot.org/c/coreboot/+/46537 Reviewed-by: Rob Barnes Reviewed-by: Felix Held Tested-by: build bot (Jenkins) --- src/mainboard/google/zork/variants/morphius/overridetree.cb | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/mainboard') diff --git a/src/mainboard/google/zork/variants/morphius/overridetree.cb b/src/mainboard/google/zork/variants/morphius/overridetree.cb index ecadb072c1..66b371be04 100644 --- a/src/mainboard/google/zork/variants/morphius/overridetree.cb +++ b/src/mainboard/google/zork/variants/morphius/overridetree.cb @@ -35,6 +35,19 @@ chip soc/amd/picasso .ports.xhci0_port2 = 1, /* Left USB3A port 2 */ }" + # USB 2.0 strength + register "usb_2_port_tune_params[3]" = "{ + .com_pds_tune = 0x07, + .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, + }" + # Enable I2C2 for trackpad, touchscreen, pen at 400kHz register "i2c[2]" = "{ .speed = I2C_SPEED_FAST, -- cgit v1.2.3