static int byt_aif1_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int ret;
snd_soc_dai_set_bclk_ratio(codec_dai, 50);
ret = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_PLL1,
params_rate(params) * 512,
SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(rtd->dev, "can't set codec clock %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_pll(codec_dai, 0, RT5640_PLL1_S_BCLK1,
params_rate(params) * 50,
params_rate(params) * 512);
if (ret < 0) {
dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
return ret;
}
return 0;
}
static int snd_rpi_hifiberry_dacplus_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
}
static int snd_rpi_proto_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int sysclk = 12288000; /* This is fixed on this board */
/* Set proto bclk */
int ret = snd_soc_dai_set_bclk_ratio(cpu_dai,32*2);
if (ret < 0){
dev_err(codec->dev,
"Failed to set BCLK ratio %d\n", ret);
return ret;
}
/* Set proto sysclk */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
sysclk, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(codec->dev,
"Failed to set WM8731 SYSCLK: %d\n", ret);
return ret;
}
return 0;
}
static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int sysclk = 27000000; /* This is fixed on this board */
long mclk_freq=0;
int mclk_div=1;
int ret;
samplerate = params_rate(params);
switch (samplerate) {
case 44100:
case 48000:
case 88200:
case 96000:
mclk_freq=samplerate*256;
mclk_div=WM8804_MCLKDIV_256FS;
break;
case 176400:
case 192000:
mclk_freq=samplerate*128;
mclk_div=WM8804_MCLKDIV_128FS;
break;
default:
dev_err(substream->pcm->dev,
"Failed to set WM8804 SYSCLK, unsupported samplerate\n");
}
snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
sysclk, SND_SOC_CLOCK_OUT);
if (ret < 0) {
dev_err(substream->pcm->dev,
"Failed to set WM8804 SYSCLK: %d\n", ret);
return ret;
}
/* Enable TX output */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
/* Power on */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
}
static int snd_rpi_iqaudio_dac_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
// NOT USED struct snd_soc_dai *codec_dai = rtd->codec_dai;
// NOT USED struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int sample_bits =
snd_pcm_format_physical_width(params_format(params));
return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
}
static int tau_dac_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
int ret, i;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card_drvdata *drvdata =
snd_soc_card_get_drvdata(rtd->card);
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai **codec_dais = rtd->codec_dais;
int num_codecs = rtd->num_codecs;
unsigned int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
unsigned int mclk_rate, bclk_rate;
unsigned int lrclk_rate = params_rate(params);
int width = params_width(params);
u16 osr;
if (width == 24)
width = 25;
switch (lrclk_rate) {
case 44100:
case 88200:
case 176400:
mclk_rate = 22579200;
break;
case 32000:
case 48000:
case 96000:
case 192000:
mclk_rate = 24576000;
break;
default:
dev_err(rtd->card->dev, "Sample rate not supported: %d",
lrclk_rate);
return -EINVAL;
}
bclk_rate = 2 * width * lrclk_rate;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_bclk_ratio(cpu_dai, 2 * width);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFS | fmt);
if (ret < 0)
return ret;
/* calculate oversampling rate */
if (lrclk_rate <= 48000)
osr = 0; /* TODO: define WM8741_OSR_LOW etc. in wm8741.h */
else if (lrclk_rate <= 96000)
osr = 1;
else
osr = 2;
for (i = 0; i < num_codecs; i++) {
/* set codec sysclk */
ret = snd_soc_dai_set_sysclk(codec_dais[i],
WM8741_SYSCLK, mclk_rate, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dais[i],
SND_SOC_DAIFMT_CBS_CFS | fmt);
if (ret < 0)
return ret;
/* set codec oversampling rate */
ret = snd_soc_update_bits(codec_dais[i]->codec,
WM8741_MODE_CONTROL_1,
WM8741_OSR_MASK, osr << WM8741_OSR_SHIFT);
if (ret < 0)
return ret;
}
/* enable clocks */
ret = tau_dac_clk_enable(drvdata, mclk_rate, bclk_rate);
if (ret < 0) {
dev_err(rtd->card->dev, "Starting clocks failed: %d\n", ret);
return ret;
}
ret = tau_dac_clk_prepare(drvdata);
if (ret < 0) {
dev_err(rtd->card->dev, "Preparing clocks failed: %d\n", ret);
return ret;
}
/* enable codecs */
/* TODO: TBC: powering down the codes is probably not required if we
* use the AVMID reference.
*/
for (i = 0; i < num_codecs; i++) {
snd_soc_update_bits(codec_dais[i]->codec, WM8741_FORMAT_CONTROL,
WM8741_PWDN_MASK, 0);
}
dev_dbg(rtd->card->dev, "%s: mclk = %u, bclk = %u, lrclk = %u, width = %d, fmt = 0x%x",
__func__, mclk_rate, bclk_rate, lrclk_rate, width, fmt);
return 0;
}
