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ASoC: arizona: Factor out rate selection code 

In preparation for more advanced sample rate managment move the existing
code out of the main hw_params() function.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-10-10 15:10:08 +09:00
parent 66b6eaf23a
commit b272efc860
1 changed files with 54 additions and 37 deletions
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91
sound/soc/codecs/arizona.c
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@ -702,17 +702,63 @@ static int arizona_startup(struct snd_pcm_substream *substream,
constraint);
}
static int arizona_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
int base = dai->driver->base;
int i, sr_val;
/*
* We will need to be more flexible than this in future,
* currently we use a single sample rate for SYSCLK.
*/
for (i = 0; i < ARRAY_SIZE(arizona_sr_vals); i++)
if (arizona_sr_vals[i] == params_rate(params))
break;
if (i == ARRAY_SIZE(arizona_sr_vals)) {
arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
params_rate(params));
return -EINVAL;
}
sr_val = i;
switch (dai_priv->clk) {
case ARIZONA_CLK_SYSCLK:
snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,
ARIZONA_SAMPLE_RATE_1_MASK, sr_val);
if (base)
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK, 0);
break;
case ARIZONA_CLK_ASYNCCLK:
snd_soc_update_bits(codec, ARIZONA_ASYNC_SAMPLE_RATE_1,
ARIZONA_ASYNC_SAMPLE_RATE_MASK, sr_val);
if (base)
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK,
8 << ARIZONA_AIF1_RATE_SHIFT);
break;
default:
arizona_aif_err(dai, "Invalid clock %d\n", dai_priv->clk);
return -EINVAL;
}
return 0;
}
static int arizona_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
int base = dai->driver->base;
const int *rates;
int i;
int bclk, lrclk, wl, frame, sr_val;
int i, ret;
int bclk, lrclk, wl, frame;
if (params_rate(params) % 8000)
rates = &arizona_44k1_bclk_rates[0];
@ -732,16 +778,6 @@ static int arizona_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(arizona_sr_vals); i++)
if (arizona_sr_vals[i] == params_rate(params))
break;
if (i == ARRAY_SIZE(arizona_sr_vals)) {
arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
params_rate(params));
return -EINVAL;
}
sr_val = i;
lrclk = snd_soc_params_to_bclk(params) / params_rate(params);
arizona_aif_dbg(dai, "BCLK %dHz LRCLK %dHz\n",
@ -750,28 +786,9 @@ static int arizona_hw_params(struct snd_pcm_substream *substream,
wl = snd_pcm_format_width(params_format(params));
frame = wl << ARIZONA_AIF1TX_WL_SHIFT | wl;
/*
* We will need to be more flexible than this in future,
* currently we use a single sample rate for SYSCLK.
*/
switch (dai_priv->clk) {
case ARIZONA_CLK_SYSCLK:
snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,
ARIZONA_SAMPLE_RATE_1_MASK, sr_val);
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK, 0);
break;
case ARIZONA_CLK_ASYNCCLK:
snd_soc_update_bits(codec, ARIZONA_ASYNC_SAMPLE_RATE_1,
ARIZONA_ASYNC_SAMPLE_RATE_MASK, sr_val);
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK,
8 << ARIZONA_AIF1_RATE_SHIFT);
break;
default:
arizona_aif_err(dai, "Invalid clock %d\n", dai_priv->clk);
return -EINVAL;
}
ret = arizona_hw_params_rate(substream, params, dai);
if (ret != 0)
return ret;
snd_soc_update_bits(codec, base + ARIZONA_AIF_BCLK_CTRL,
ARIZONA_AIF1_BCLK_FREQ_MASK, bclk);