Exemplo n.º 1
0
static int s3c_idma_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct lpam_i2s_pdata *prtd = substream->runtime->private_data;
	unsigned long idma_totbytes;

	pr_debug("Entered %s\n", __func__);

	idma_totbytes = params_buffer_bytes(params);
	prtd->end = LP_TXBUFF_ADDR + idma_totbytes;
	prtd->period = params_periods(params);
	s3c_idma.dma_end    = prtd->end;
	s3c_idma.period_val = prtd->period;

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	memset(runtime->dma_area, 0, LP_BUFSIZE);

	runtime->dma_bytes = idma_totbytes;

	s3c_idma_setcallbk(s3c_idma_done, params_period_bytes(params));

	prtd->start = runtime->dma_addr;
	prtd->pos = prtd->start;
	prtd->end = prtd->start + idma_totbytes;

	printk("DmaAddr=@%x Total=%lubytes PrdSz=%u #Prds=%u\n",
			prtd->start, idma_totbytes, params_period_bytes(params), prtd->period);

	return 0;
}
Exemplo n.º 2
0
static int s3c_idma_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct lpam_i2s_pdata *prtd = substream->runtime->private_data;

	pr_debug("Entered %s\n", __func__);

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	runtime->dma_bytes = params_buffer_bytes(params);
	memset(runtime->dma_area, 0, runtime->dma_bytes);

	prtd->start = prtd->pos = runtime->dma_addr;
	prtd->period = params_periods(params);
	prtd->periodsz = params_period_bytes(params);
	prtd->end = LP_TXBUFF_ADDR + runtime->dma_bytes;

	s3c_idma_setcallbk(substream, s3c_idma_done);

	pr_info("DmaAddr=@%x Total=%dbytes PrdSz=%d #Prds=%d dma_area=0x%x\n",
			prtd->start, runtime->dma_bytes, prtd->periodsz,
			prtd->period, (unsigned int)runtime->dma_area);
	return 0;
}