->ssc.base;
	dma_params->substream = substream;

	ssc_p->dma_params[dir] = dma_params;

	/*
	 * The cpu_dai->dma_data field is only used to communicate the
	 * appropriate DMA parameters to the pcm driver hw_params()
	 * function.  It should not be used for other purposes
	 * as it is common to all substreams.
	 */
	rtd->dai->cpu_dai->dma_data = dma_params;

	channels = params_channels(params);

	/*
	 * Determine sample size in bits and the PDC increment.
	 */
	switch(params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		bits = 8;
		dma_params->pdc_xfer_size = 1;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		bits = 16;
		dma_params->pdc_xfer_size = 2;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		bits = 24;
		dma_params->pdc_xfer_size = 4;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		bits = 32;
		dma_params->pdc_xfer_size = 4;
		break;
	default:
		printk(KERN_WARNING "at91-ssc: unsupported PCM format");
		return -EINVAL;
	}

	/*
	 * The SSC only supports up to 16-bit samples in I2S format, due
	 * to the size of the Frame Mode Register FSLEN field.
	 */
	if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
		&& bits > 16) {
		printk(KERN_WARNING
			"at91-ssc: sample size %d is too large for I2S\n", bits);
		return -EINVAL;
	}

	/*
	 * Compute SSC register settings.
	 */
	switch (ssc_p->daifmt
		& (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {

	case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
		/*
		 * I2S format, SSC provides BCLK and LRC clocks.
		 *
		 * The SSC transmit and receive clocks are generated from the
		 * MCK divider, and the BCLK signal is output on the SSC TK line.
		 */
		rcmr =	  (( ssc_p->rcmr_period		<< 24) & AT91_SSC_PERIOD)
			| (( 1				<< 16) & AT91_SSC_STTDLY)
			| (( AT91_SSC_START_FALLING_RF	     ) & AT91_SSC_START)
			| (( AT91_SSC_CK_RISING		     ) & AT91_SSC_CKI)
			| (( AT91_SSC_CKO_NONE		     ) & AT91_SSC_CKO)
			| (( AT91_SSC_CKS_DIV		     ) & AT91_SSC_CKS);

		rfmr =	  (( AT91_SSC_FSEDGE_POSITIVE	     ) & AT91_SSC_FSEDGE)
			| (( AT91_SSC_FSOS_NEGATIVE	     