C++ (Cpp) __pcm_set_syndiv Examples

Example #1

static int pcm_set_rate(unsigned long *rate)
{
	unsigned long div;
	if (pcm_priv->pcm_device_mode == PCM_MASTER) {
		if (!pcm_priv)
			return -ENODEV;
		div = pcm_priv->pcmclk/(8*(*rate)) - 1;
		if (div >= 0 && div < 32) {
			__pcm_set_syndiv(div);
			*rate = pcm_priv->pcmclk/(8*(div+1));
			pcm_priv->rate = *rate;
		} else
			*rate = pcm_priv->rate;
	}
//	__pcm_set_syndiv(div);

	return 0;
}

Example #2

static int jz_pcm_startup(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct device *dev = dai->dev;
	struct jz_pcm *jz_pcm = dev_get_drvdata(dai->dev);

	PCM_DEBUG_MSG("enter %s, substream = %s\n",
			__func__,
			(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? "playback" : "capture");

	if (!jz_pcm->pcm_mode) {
		clk_enable(jz_pcm->clk_gate);
#if 1
		__pcm_as_slaver(dev);
#else
		clk_set_rate(jz_pcm->clk, 9600000);
		clk_enable(jz_pcm->clk);
		__pcm_as_master(dev);
		__pcm_set_clkdiv(dev, 9600000/20/8000 - 1);
		__pcm_set_syndiv(dev, 20 - 1);
#endif
		__pcm_set_msb_one_shift_in(dev);
		__pcm_set_msb_one_shift_out(dev);
		__pcm_play_lastsample(dev);
		__pcm_enable(dev);
		__pcm_clock_enable(dev);
	}

	if (substream->stream ==
			SNDRV_PCM_STREAM_PLAYBACK) {
		__pcm_disable_transmit_dma(dev);
		__pcm_disable_replay(dev);
		__pcm_clear_tur(dev);
		jz_pcm->pcm_mode |= PCM_WRITE;
	} else {
		__pcm_disable_receive_dma(dev);
		__pcm_disable_record(dev);
		__pcm_clear_ror(dev);
		jz_pcm->pcm_mode |= PCM_READ;
	}
	printk("start set PCM register....\n");
	return 0;
}