IPCR_ENABLE
void __iomem *reg = mb->rx_regs + IPCR_ENABLE;
void __iomem *reg = mb->rx_regs + IPCR_ENABLE;
status = readl(mb->rx_regs + IPCR_ENABLE) &
if (!(readl(mb->tx_regs + IPCR_ENABLE) & BIT(idx))) {