KS_DMA_RX_CTRL
writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);
writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);
writel((hw->rx_cfg & ~DMA_RX_ENABLE), hw->io + KS_DMA_RX_CTRL);
writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL);