From 4ead6b33671bba5f67f1cb0d6df5979b47e4ccc0 Mon Sep 17 00:00:00 2001 From: John Zhao Date: Fri, 1 Jan 2021 14:19:36 -0800 Subject: soc/intel/tigerlake: Enable USB2 port reset message on Type-C ports USB3 is in CPU and USB2 in PCH on Tigerlake. Cross die messaging is implemented between CPU and PCH through the IOSF SB bridge. a PCH xHCI USB2 port reset event issued by the xHCI driver shall trigger a message upstream to CPU to wake it from the low power state which allows a USB3 device that downgraded to USB2 to upgrade back to USB3. BUG=b:176575892 TEST=Built and booted to kernel on Voxel board. Signed-off-by: John Zhao Change-Id: I672f30a117980bc10bd71e9b77c5fa76286b9f5f Reviewed-on: https://review.coreboot.org/c/coreboot/+/49052 Reviewed-by: Tim Wawrzynczak Reviewed-by: Chiranjeevi Rapolu Tested-by: build bot (Jenkins) --- src/soc/intel/tigerlake/fsp_params.c | 3 +++ src/soc/intel/tigerlake/include/soc/usb.h | 2 ++ 2 files changed, 5 insertions(+) (limited to 'src/soc') diff --git a/src/soc/intel/tigerlake/fsp_params.c b/src/soc/intel/tigerlake/fsp_params.c index ed34897274..295f7896f2 100644 --- a/src/soc/intel/tigerlake/fsp_params.c +++ b/src/soc/intel/tigerlake/fsp_params.c @@ -159,6 +159,9 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) params->Usb2OverCurrentPin[i] = config->usb2_ports[i].ocpin; else params->Usb2OverCurrentPin[i] = 0xff; + + if (config->usb2_ports[i].type_c) + params->PortResetMessageEnable[i] = 1; } for (i = 0; i < ARRAY_SIZE(config->usb3_ports); i++) { diff --git a/src/soc/intel/tigerlake/include/soc/usb.h b/src/soc/intel/tigerlake/include/soc/usb.h index 69b5ca89a7..5dea4bf52e 100644 --- a/src/soc/intel/tigerlake/include/soc/usb.h +++ b/src/soc/intel/tigerlake/include/soc/usb.h @@ -31,6 +31,7 @@ struct usb2_port_config { uint8_t tx_emp_enable; uint8_t pre_emp_bias; uint8_t pre_emp_bit; + uint8_t type_c; }; /* USB Overcurrent pins definition */ @@ -112,6 +113,7 @@ enum { .tx_emp_enable = USB2_PRE_EMP_ON, \ .pre_emp_bias = USB2_BIAS_56P3MV, \ .pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \ + .type_c = 1, \ } struct usb3_port_config { -- cgit v1.2.3