XHCI_STS_OFFSET
timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
val = readl(op_reg_base + XHCI_STS_OFFSET);
timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
val = readl(op_reg_base + XHCI_STS_OFFSET);