REG_TX_CFG
readl(cp->regs + REG_TX_CFG),
writel(val, cp->regs + REG_TX_CFG);
val = readl(cp->regs + REG_TX_CFG) | TX_CFG_DMA_EN;
writel(val, cp->regs + REG_TX_CFG);
val = readl(cp->regs + REG_TX_CFG);
writel(val, cp->regs + REG_TX_CFG);