TIMBDMA_IER
ier = ioread32(td->membase + TIMBDMA_IER);
iowrite32(ier, td->membase + TIMBDMA_IER);
iowrite32(ier, td->membase + TIMBDMA_IER);
iowrite32(0, td->membase + TIMBDMA_IER);
iowrite32(0x0, td->membase + TIMBDMA_IER);