SSIFRDR
ssi->dma_dais[SNDRV_PCM_STREAM_CAPTURE].addr = (dma_addr_t)res->start + SSIFRDR;
*buf++ = (u16)(rz_ssi_reg_readl(ssi, SSIFRDR) >> 16);
*buf++ = rz_ssi_reg_readl(ssi, SSIFRDR);