C++ (Cpp) dw_dma_get_src_addr 예제들

예제 #1

static snd_pcm_uframes_t
atmel_abdac_pointer(struct snd_pcm_substream *substream)
{
	struct atmel_abdac	*dac = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime	*runtime = substream->runtime;
	snd_pcm_uframes_t	frames;
	unsigned long		bytes;

	bytes = dw_dma_get_src_addr(dac->dma.chan);
	bytes -= runtime->dma_addr;

	frames = bytes_to_frames(runtime, bytes);
	if (frames >= runtime->buffer_size)
		frames -= runtime->buffer_size;

	return frames;
}

예제 #2

static snd_pcm_uframes_t
atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream)
{
	struct atmel_ac97c	*chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime	*runtime = substream->runtime;
	snd_pcm_uframes_t	frames;
	unsigned long		bytes;

	if (cpu_is_at32ap7000())
		bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
	else
		bytes = readl(chip->regs + ATMEL_PDC_TPR);
	bytes -= runtime->dma_addr;

	frames = bytes_to_frames(runtime, bytes);
	if (frames >= runtime->buffer_size)
		frames -= runtime->buffer_size;
	return frames;
}