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mb/google/volteer: Configure Delbin USB2 ports for Type C 

Two USB2 ports 4 and 9 are assigned to type C connectors on Delbin
board. This update configures these USB2 ports for Type C which will
allow USB2 port reset message upstream from PCH to CPU to recover a USB3
device that downgraded to USB2 to upgrade back to USB3.

BUG=b:176575892
TEST=Booted to kernel on Delbin board and verified usb2 port reset
message enable bits through pch xhci_mmio_base + R_XHCI_MEM_U2PRM_U2PRDE
where the offset register R_XHCI_MEM_U2PRM_U2PRDE has value 0x92f4.
Validated various USB3 devices enumeration.

Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: Idb3ce949e1ecf3adc7615e0af79a38a0cc9be18f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49202
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
John Zhao 2021-01-06 20:52:16 -08:00 committed by Tim Wawrzynczak
parent e862a004d7
commit 9c1a335fbc
1 changed files with 2 additions and 0 deletions
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2
src/mainboard/google/volteer/variants/delbin/overridetree.cb
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@ -51,7 +51,9 @@ chip soc/intel/tigerlake
.tx_emp_enable = USB2_PRE_EMP_ON,
.pre_emp_bias = USB2_BIAS_56P3MV,
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP,
.type_c = 1,
}"
register "usb2_ports[8]" = "USB2_PORT_TYPE_C(OC_SKIP)"
# Acoustic settings
register "AcousticNoiseMitigation" = "1"