C++ (Cpp) dw_dma_cyclic_stop Examples

Example #1

static int atmel_abdac_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
	int retval = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
	case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
	case SNDRV_PCM_TRIGGER_START:
		clk_enable(dac->sample_clk);
		retval = dw_dma_cyclic_start(dac->dma.chan);
		if (retval)
			goto out;
		dac_writel(dac, CTRL, DAC_BIT(EN));
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
	case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
	case SNDRV_PCM_TRIGGER_STOP:
		dw_dma_cyclic_stop(dac->dma.chan);
		dac_writel(dac, DATA, 0);
		dac_writel(dac, CTRL, 0);
		clk_disable(dac->sample_clk);
		break;
	default:
		retval = -EINVAL;
		break;
	}
out:
	return retval;
}

Example #2

File: ac97c.c Project: vickylinuxer/at91sam9g35-kernel

static int
atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
	unsigned long camr, ptcr = 0;
	int retval = 0;

	camr = ac97c_readl(chip, CAMR);
	ptcr = readl(chip->regs + ATMEL_PDC_PTSR);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
	case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
	case SNDRV_PCM_TRIGGER_START:
		if (cpu_is_at32ap7000()) {
			retval = dw_dma_cyclic_start(chip->dma.rx_chan);
			if (retval)
				goto out;
		} else {
			ptcr = ATMEL_PDC_RXTEN;
		}
		camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
	case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
	case SNDRV_PCM_TRIGGER_STOP:
		if (cpu_is_at32ap7000())
			dw_dma_cyclic_stop(chip->dma.rx_chan);
		else
			ptcr |= (ATMEL_PDC_RXTDIS);
		if (chip->opened <= 1)
			camr &= ~AC97C_CMR_CENA;
		break;
	default:
		retval = -EINVAL;
		break;
	}

	ac97c_writel(chip, CAMR, camr);
	if (!cpu_is_at32ap7000())
		writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
out:
	return retval;
}