Ejemplo n.º 1
0
/*
 * Set the SSPA audio DMA parameters and sample size.
 * Can be called multiple times by oss emulation.
 */
static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params,
			       struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
	struct ssp_device *sspa = sspa_priv->sspa;
	struct snd_dmaengine_dai_dma_data *dma_params;
	u32 sspa_ctrl;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_TXCTL);
	else
		sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_RXCTL);

	sspa_ctrl &= ~SSPA_CTL_XFRLEN1_MASK;
	sspa_ctrl |= SSPA_CTL_XFRLEN1(params_channels(params) - 1);
	sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
	sspa_ctrl |= SSPA_CTL_XWDLEN1(SSPA_CTL_32_BITS);
	sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_8_BITS);
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_16_BITS);
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_20_BITS);
		break;
	case SNDRV_PCM_FORMAT_S24_3LE:
		sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_24_BITS);
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_32_BITS);
		break;
	default:
		return -EINVAL;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
		mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1);
	} else {
		mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
		mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0);
	}

	dma_params = &sspa_priv->dma_params[substream->stream];
	dma_params->addr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
				(sspa->phys_base + SSPA_TXD) :
				(sspa->phys_base + SSPA_RXD);
	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_params);
	return 0;
}
Ejemplo n.º 2
0
static void mmp_sspa_rx_disable(struct ssp_device *sspa)
{
	unsigned int sspa_sp;

	sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
	sspa_sp &= ~SSPA_SP_S_EN;
	sspa_sp |= SSPA_SP_WEN;
	mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
}
Ejemplo n.º 3
0
static void mmp_sspa_tx_enable(struct ssp_device *sspa)
{
	unsigned int sspa_sp;

	sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
	sspa_sp &= ~SSPA_SP_S_RST;
	sspa_sp |= SSPA_SP_S_EN;
	mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
}
Ejemplo n.º 4
0
/*
 * Set up the sspa dai format. The sspa port must be inactive
 * before calling this function as the physical
 * interface format is changed.
 */
static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
				 unsigned int fmt)
{
	struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(cpu_dai);
	struct ssp_device *sspa = sspa_priv->sspa;
	u32 sspa_sp, sspa_ctrl;

	/* check if we need to change anything at all */
	if (sspa_priv->dai_fmt == fmt)
		return 0;

	/* we can only change the settings if the port is not in use */
	if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) ||
	    (mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) {
		dev_err(&sspa->pdev->dev,
			"can't change hardware dai format: stream is in use\n");
		return -EINVAL;
	}

	/* reset port settings */
	sspa_sp   = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
	sspa_ctrl = 0;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		sspa_sp |= SSPA_SP_MSL;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		sspa_sp |= SSPA_SP_FSP;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		sspa_sp |= SSPA_TXSP_FPER(63);
		sspa_sp |= SSPA_SP_FWID(31);
		sspa_ctrl |= SSPA_CTL_XDATDLY(1);
		break;
	default:
		return -EINVAL;
	}

	mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
	mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);

	sspa_sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
	mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
	mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);

	/*
	 * FIXME: hw issue, for the tx serial port,
	 * can not config the master/slave mode;
	 * so must clean this bit.
	 * The master/slave mode has been set in the
	 * rx port.
	 */
	sspa_sp &= ~SSPA_SP_MSL;
	mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);

	mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
	mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);

	/* Since we are configuring the timings for the format by hand
	 * we have to defer some things until hw_params() where we
	 * know parameters like the sample size.
	 */
	sspa_priv->dai_fmt = fmt;
	return 0;
}