MAC_TXCFG
val = readl(gp->regs + MAC_TXCFG);
writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_TXCFG);
writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
writel(val, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_TXCFG);
writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
val = readl(gp->regs + MAC_TXCFG);
writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
writel(0, gp->regs + MAC_TXCFG);
writel(0, gp->regs + MAC_TXCFG);
readl(gp->regs + MAC_TXCFG));