XHCI_SCTX_0_SPEED_SET
temp |= XHCI_SCTX_0_SPEED_SET(2);
temp |= XHCI_SCTX_0_SPEED_SET(3);
temp |= XHCI_SCTX_0_SPEED_SET(1);
temp |= XHCI_SCTX_0_SPEED_SET(4);