diff options
| -rw-r--r-- | src/mainboard/google/gru/mainboard.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c index 5926e492cf..bb9b6fca98 100644 --- a/src/mainboard/google/gru/mainboard.c +++ b/src/mainboard/google/gru/mainboard.c @@ -260,15 +260,20 @@ static void setup_usb(void) RK_CLRSETBITS(0xffff, 0xa7)); /* - * Disable the pre-emphasize in eop state and chirp + * 1. Disable the pre-emphasize in eop state and chirp * state to avoid mis-trigger the disconnect detection * and also avoid high-speed handshake fail for PHY0 * and PHY1 consist of otg-port and host-port. + * + * 2. Configure PHY0 and PHY1 otg-ports squelch detection + * threshold to 125mV (default is 150mV). */ - write32(&rk3399_grf->usbphy0_ctrl[0], RK_CLRBITS(0x3)); - write32(&rk3399_grf->usbphy1_ctrl[0], RK_CLRBITS(0x3)); - write32(&rk3399_grf->usbphy0_ctrl[13], RK_CLRBITS(0x3)); - write32(&rk3399_grf->usbphy1_ctrl[13], RK_CLRBITS(0x3)); + write32(&rk3399_grf->usbphy0_ctrl[0], + RK_CLRSETBITS(7 << 13 | 3 << 0, 6 << 13)); + write32(&rk3399_grf->usbphy1_ctrl[0], + RK_CLRSETBITS(7 << 13 | 3 << 0, 6 << 13)); + write32(&rk3399_grf->usbphy0_ctrl[13], RK_CLRBITS(3 << 0)); + write32(&rk3399_grf->usbphy1_ctrl[13], RK_CLRBITS(3 << 0)); /* * ODT auto compensation bypass, and set max driver |