RXCFG_RX_FD
writel(readl(ns->base + RXCFG) | RXCFG_RX_FD,
writel(readl(ns->base + RXCFG) & ~RXCFG_RX_FD,
writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD