diff options
-rw-r--r-- | src/soc/mediatek/mt8188/usb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8188/usb.c b/src/soc/mediatek/mt8188/usb.c index 2312e2d42a..75d4667e7a 100644 --- a/src/soc/mediatek/mt8188/usb.c +++ b/src/soc/mediatek/mt8188/usb.c @@ -11,7 +11,22 @@ #include <soc/pll_common.h> #include <soc/usb.h> +#define TRAP_USB20_P1_USBD1_EN 0x10005600 + +static void mt_set_trapping_pin(void) +{ + /* + * MT8188 supports port0/port1 download. The hardware needs a trapping pin to + * select the port to use. When port1 is selected, the phy of port1 will be + * switched to port0. That is, port1 connector will be the physical line of + * port0. Since port0 phy isn't initialized in coreboot, switch back to port1 + * phy. + */ + setbits32p(TRAP_USB20_P1_USBD1_EN, BIT(9)); +} + void mtk_usb_prepare(void) { mt_pll_set_usb_clock(); + mt_set_trapping_pin(); } |