static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
return bytes_to_frames(runtime, io->byte_pos);
}
static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
rdai->clk_master = 0;
break;
case SND_SOC_DAIFMT_CBS_CFS:
rdai->clk_master = 1; /* codec is slave, cpu is master */
break;
default:
return -EINVAL;
}
/* set format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
rdai->sys_delay = 0;
rdai->data_alignment = 0;
rdai->frm_clk_inv = 0;
break;
case SND_SOC_DAIFMT_LEFT_J:
rdai->sys_delay = 1;
rdai->data_alignment = 0;
rdai->frm_clk_inv = 1;
break;
case SND_SOC_DAIFMT_RIGHT_J:
rdai->sys_delay = 1;
rdai->data_alignment = 1;
rdai->frm_clk_inv = 1;
break;
}
/* set clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_IF:
rdai->bit_clk_inv = rdai->bit_clk_inv;
rdai->frm_clk_inv = !rdai->frm_clk_inv;
break;
case SND_SOC_DAIFMT_IB_NF:
rdai->bit_clk_inv = !rdai->bit_clk_inv;
rdai->frm_clk_inv = rdai->frm_clk_inv;
break;
case SND_SOC_DAIFMT_IB_IF:
rdai->bit_clk_inv = !rdai->bit_clk_inv;
rdai->frm_clk_inv = !rdai->frm_clk_inv;
break;
case SND_SOC_DAIFMT_NB_NF:
default:
break;
}
return 0;
}
static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
int ret;
unsigned long flags;
rsnd_lock(priv, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
ret = rsnd_dai_stream_init(io, substream);
if (ret < 0)
goto dai_trigger_end;
ret = rsnd_platform_call(priv, dai, start, ssi_id);
if (ret < 0)
goto dai_trigger_end;
ret = rsnd_dai_call(init, io, priv);
if (ret < 0)
goto dai_trigger_end;
ret = rsnd_dai_call(start, io, priv);
if (ret < 0)
goto dai_trigger_end;
break;
case SNDRV_PCM_TRIGGER_STOP:
ret = rsnd_dai_call(stop, io, priv);
if (ret < 0)
goto dai_trigger_end;
ret = rsnd_dai_call(quit, io, priv);
if (ret < 0)
goto dai_trigger_end;
ret = rsnd_platform_call(priv, dai, stop, ssi_id);
if (ret < 0)
goto dai_trigger_end;
break;
default:
ret = -EINVAL;
}
dai_trigger_end:
rsnd_unlock(priv, flags);
return ret;
}